You must know the tower crane safety management knowledge

As a crane practitioners, in addition to playing a "mainstay" role in building construction, but also an important part of safety in production. According to long-term service crane driver, commander summed up the crane driver safety fifteen issues, and I hope to be helpful crane training.

1, as a crane driver, the body must be healthy, two should maintain good vision, no color blindness, hearing no sensitive ears. Must pass safety training, special operations personnel to obtain operating permits before they operate independently.

2, the crane hook must be sensitive, rope drum, broken rope safety device, must have a valid ultra limit, amplitude limit, walking limit, torque limiter, the cab lifting stopper, etc., up ladder due retainer.

3, the crane driver must be familiar with the operation of the performance of construction crane, operated by crane to relevant regulations, it is strictly prohibited illegal operations. Should be familiar with the mechanical maintenance, repair knowledge, according to the provisions of the machinery for routine maintenance. It is particularly worth mentioning is that second-hand crane during maintenance should also check their useful life is in line with the provisions of the specification and the relevant departments.

4, the crane driver before the job should lift rail tongs, remove obstacles on the track, tighten the screws splints; hanging should be checked again before use.

5, crane personnel in the job, it should open the cab window, pay attention to traffic signals; cab heating in winter, there should be fire, electric shock measures.

6, after passing the acceptance test the crane installation can be put into use. Do not use without the acceptance or non-acceptance of the crane.

7, crane rail travel to near the limit switch, should slow down in advance parking; signal is unknown or may cause an accident, you should pause operation.

8, when more than one tower crane joint operation, should pay attention to maintaining the respective operating distance.

9, when the object lifting ban on the article station or for processing.

10, when lifting someone can not lower the boom to stay or walk, the boom, the object must be kept a safe distance from overhead wires; lifting must adhere to the "do not hang ten" safe operating regulations.

11, lifting heavy non-free-fall, with a slow decline in the weight drop foot brake or hand brake control.

12, when the tower crane lifting load at or near full capacity, non-landed arm or two actions simultaneously.

13, after the job is completed, the crane should be parked in the middle of the track, the arm should not be too high, it should forward air source, card grip rail clamp, cut off the power; lifting objects should be put down, stopped brake lever in neutral and closed lock.

14 In addition, self-elevating tower crane when lifting objects, balance weight must be moved to a predetermined position.

15, must relax tower ceiling rose cable, relaxed length should be slightly larger than the total lifting height, and fixing the cable reel; should be closer to lifting the car and the counterweight tower cap and stopped rotating part, is strictly prohibited Tower cap rotation. Source: HC Engineering Machinery Network

Choose cost-effective concrete batching plant needs where several departure

Choose cost-effective concrete batching plant to listen to the evaluation of the production of front-line staff to the scene, to see the manufacturer's production capability, multi-select several manufacturers to shop around, requiring manufacturers to spot test machine and other aspects.
1, to the concrete batching plant on the site where the old user learning experience, ask how much concrete batching plant daily output, the failure rate, if more was on the service, your concrete batching plant prices where more money to buy;
 2, multi-faceted understanding of concrete batching plant knowledge, as far as possible to select the device in their own efforts, some manufacturers for you is purely blind flicker, such as concrete mixing plants hzs35 one hour are they amounted to less than 35 square concrete, actually told you he There are secret law can reach, after the encounter this kind of problem when listening to a lively, not credible;
3, requires concrete batching plant manufacturers to introduce their latest client site, this is the best way to test the quality of equipment manufacturers, if the manufacturers about avoidance, the following questions would not talk about, this factory have a problem;
4, to a certain number of manufacturers to study, not only to increase our understanding of the concrete batching plant, but also through comparison to judge, so there is a bargain bottom line.
In the actual purchase equipment concrete mixer them, the situation appears much more complex than these, do not easily place an order, to examine the decision after mature, buy concrete batching plant at risk, the investment need to be cautious.

Concrete batching plant selects address factors that need attention

We should have to do everything before their plans, planning to do things, so we can do more with less. Of course, for their own stable soil batching plant location is not careless, between the establishment must have a very detailed plan. If not, then the position will very much affect the business concrete batching plant, and even lead to the collapse of batching plant. So when choosing where you want the focus to consider what issues it?
First, when the site selection must be based on people-oriented principle, as far as possible away from residential areas. We know that stabilized soil batching plant noise will be great, if too close to residential areas, then will wake residents, affect the quality of life of residents, so is not conducive to the development of stabilized soil batching plant.
Second, consider some of the external factors, such as water. Stabilized soil batching plant takes a lot of water every day, and if too far away from the water, then not only will you produce a great deal of impact will be, will increase a lot of unnecessary spending, resulting in increased cost of the concrete.
Third, the traffic is a very important factor, try to choose a place convenient transportation at the site, so easy to purchase and shipping, will give their batching plants bring a lot of customers, making the business more prosperous .
Finally, we need to be built according to their size stabilized soil batching plant selection area, best to reserve space for their future development batching plant.

Summer, talk about concrete mixers clever addition to odor tips

In summer, the smell of the concrete mixer how to handle it? The following small series for everyone to say a few clever tips and deodorization:
Formaldehyde volatile period for long features, we want to carry out a long-term “tug of war.” So we have to choose a method of long-term fight against formaldehyde!

1, window ventilation is the most practical and most convenient and effective way, so usually try more windows open for ventilation, helping harmful volatile substances, if you want to turn on the air, but also to make more use of the outer loop, mainly to ensure that fresh outside air to quickly enter In most cases, the outside air is cleaner than the air inside the vehicle.
 2, the use of activated carbon adsorption of formaldehyde emitted car smell, and smell with these “long war”, good effect. There are a lot of stores have ready-packed car sales with activated carbon in addition to taste, such as “happy forest activated carbon”, the price is not expensive.
 3, you can buy car air purifiers car air PM2.5, toxic gases (formaldehyde, benzene, TVOC, etc.), odor, bacteria, viruses and other vehicle pollution, such as Foxwoods car air purifier uses capture rate of up to 80% of the nano plant fiber, with its high density and permeability of physical characteristics, filtering suspended dust particles in the air. In addition to odor effect is obvious.
Finally, it should be noted that after the car into the exposure, please do not rush to open air, it will make you inhale more formal, long-term inhalation can affect their health, should be lowered all the windows or open the door, then open big the fan speed air circulation, three or four minutes and then close the windows open air, so that is more conducive to good health. 

How to handle it about concrete pump blocked pump?

In situ concrete construction in most afraid of is the emergence of concrete pumps pump blocking phenomenon, which not only affect the construction schedule, but also a waste of engineering materials. Now Hunan people and heavy engineering and technical personnel to tell you how to deal with concrete pump blocked pump!
Usually concrete delivery pumping system operation abruptly interrupted, and there is abnormal sound, concrete pump has a strong vibration, but without a corresponding vibration in the pipeline. This is likely to be clogged with a valve at the outlet. Remedy: Pour water into the hopper mud, repeated forward and reverse start the pump, so that blockage open mouth open. If you still can not rule out the blockage, it can only be artificially excluded, remove the tubing, remove debris at the discharge port with a valve.
In fact, the mechanical equipment and people, but also require routine maintenance and repair, or else no matter how good, and then stick the concrete pump problems will arise, so the completion of each construction should be promptly flushed with high pressure water pump and pipeline, Remove residual, including concrete, so that we can maximize the use of, for their own cost savings to bring more revenue!

What configuration required equipment concrete mixer

Batching plant mixer is not the component parts of each component carry out their duties, but also has very close links with each other, because it determines whether the normal operation of the mixer, so the mixer, it It is very important configuration. So, what equipping concrete mixer needs?
Large extent can be summarized in three aspects: transmission, gear system, concrete batching plant accessories.
Batching plant mixer transmission system, comprising: a rotating belt, gear, and hydraulic rotation and so on. Belt drive is the most common transmission system, a plurality of belt belt drive system requirement is a job of work, and each belt is a unified model, the length of the little difference, so as to maintain off a belt are hard, even by force, stirring transmission effect will be much better.
Mixer gear reducer is a key factor affecting the normal operation of the mixer, gear oil spill will have an impact on the effect of stirring mixer mixing quality.
concrete batching plant accessories (mixer accessories), good quality mixer accessories, directly determines the mixing efficiency mixer, since the forging of different materials, quality mixer accessories will be different, resulting in a stirrer hardness and wear resistance will have a lot of differences.
In summary mixer system is composed of three: transmission, gear system, concrete batching plant accessories.

Spring cone crusher cone unit assembly requirements

Spring cone crusher which spherical bearings bolted to the body, the upper and lower bushing by means of an interference fit, keys and bolts positioned at the top of its spherical bearing spindle bowl tile sphere, while the lower bushing is set in skew eccentric the outer cylinder, the gap between the two is about 1mm, eccentric eccentrically rotating movement, by means of contact with the body and the eccentric bushing suite to support moving cone.

In the empty payload, the liner into contact with the bowl bearing frame to prevent overturning and damping rotation, lubricants directly through the spindle lubrication bowl tiles and the upper and lower bushings, T-ring binder in moving cone below the groove inside, and the top of the counterweight u sealing rings labyrinth seal to prevent oil spills, and to protect the surface from dust gears and bearings against, moving cone-shaped baffle plate beneath the skirt, to prevent splashing of oil leaking from the labyrinth seal ring

When refueling the most suitable concrete mixer

Due to the large concrete mixer truck fuel consumption, often need to refuel. Often have concrete mixer driver complained noon plus a full tank of fuel, not to call it a day in the evening soon no oil. The same car, the same load, which is why I use the mixer so fast? I said that according to his analysis of the situation, summed up the reasons:
One can avoid the midday sun by the drug, the high temperature of the invasion, partly because gasoline is billing volume rather than weight, thermal expansion and contraction. Gasoline volume at night or early morning is relatively small, the same volume of gasoline may have better quality, it is not easy blistering and volatile, so at night or early morning refueling. Although the vast majority have a underground oil storage depots, petrol is not directly exposed to higher temperatures, the temperature is relatively stable. But in theory, when the hot weather, gasoline or will be expanded slightly when passing through tankers. Especially in the hot summer weather, the outdoor temperature is 37 degrees Celsius at noon, potentially increasing the coefficient of expansion of the gasoline, the owner is also the most suitable for refueling.
So you owners who pay attention, to try to choose at night or early morning when more cost-effective and energy-saving fuel. 

Should pay attention to what matters to clean concrete mixer

With the development in recent years, new rural construction, urban renewal and other aspects of development, roads, bridges, housing and other construction is booming, concrete as the most important construction materials, concrete mixers various construction machinery ideal mixing equipment. With respect to the bridge, crane, the mixer is relatively maintenance is relatively easy, but can not be underestimated, perhaps a small detail will directly affect concrete mixers, such as: concrete mixer cleaning.
Concrete mixer should be cleaned to note the following:
First, regular maintenance procedures specified projects, maintenance operations, such as cleaning, lubricating, refueling
Second, the concrete mixer before starting first check the controller is good, and stones into the water after the suspension was stirred cylinder 10 to 15 minutes cleaning, then cleared the water and stone. The operator shall enter such as stirring barrel cleaning, in addition to cut off the power and remove the fuse outside, and shall lock switch box.
Third, prohibit the use of a sledgehammer beat way to clear accumulated in the concrete mixer concrete barrel, it can only be removed with a chisel.
Fourth, in the cold season, after the work is completed and the application of water to wash the mixer drum pumps, water tanks, water discharge pipes inside the net, so water pumps, water tanks, water pipes freezing.

What is concrete mixer

The self falling mixer has a long history, as early as the beginning of twentieth Century, the drum type concrete mixer driven by the steam engine began to appear. After the 1950s, reversing the type material and tilt pulls out feeding type double tapered mixer and crack drum mixer etc. in succession and development. On the inner wall of the self - falling concrete mixer, the mixing blades are radially arranged on the inner wall. After work, the mixing drum around the horizontal axis rotary and join the mixing tube material, the leaves are up to a certain height, by the weight drop, so the cycle of movement to stir effect. The structure of the self - falling concrete mixer is simple, which is generally based on the mixed concrete.
Forced mixer, after the beginning of 1950s, the rapid development and promotion. The first is the vertical disc type forced concrete mixer. This mixer is divided into two types, one is the vortex and the one is the one. After the seventies of the 19th century, with the application of lightweight aggregate, circular groove horizontal shaft type forced mixer. It is divided into two kinds of single horizontal shaft type and the double horizontal shaft type, both from the fall and forced two kinds of mixing characteristics. The linear velocity of the blades is small, the wear resistance is good and the energy consumption is little. The forced concrete mixer is arranged on the rotating shaft of the rotating shaft of the mixing barrel, and the mixing blade is arranged on the rotating shaft, and the material is added into the mixing barrel. The stirring mode is much stronger than that of the self - stirring mode, which is mainly suitable for mixing dry hard concrete.
The continuous concrete mixer is equipped with a screw type mixing blade, and each material is fed into a mixer, and the concrete is continuously discharged out of the discharge end. The mixing time is short, the productivity is high, and the development of this kind of mixer is notable.
With the development of concrete materials and construction technology, many new types of concrete mixer, such as steam heating type mixer, supercritical speed mixer, sound mixer, the mixing vane of the rolling disc mixer and the two stirring of concrete mixer, etc..

Buy concrete pump method

Starting from the technical parameters Typically, a concrete pump has the following main technical parameters: transport emissions, the outlet pressure, electrical power and distribution valves form. In accordance with the new national standards, which several key parameters from the concrete model of the pump can be learned. The following concrete pump "HBT60-16-110S" concrete pump as an example of their representatives significance
HB-- concrete pump pinyin abbreviation
T-- towed
S-- dispensing valve for the S-shaped swing pipe valve
60-- maximum transport capacity, m3 / h
16 ---- concrete conveying the maximum pressure at the pump outlet, MPa
110-- motor power, kW
Marked according to the outlet pressure rating, is divided into a low pressure pump (≤5MPa), the pump (6-10MPs) and high-pressure pump (> 10MPa); according to the maximum throughput per hour, there are 20-100m3 range, and large Most concrete pump can achieve two tranches of variable displacement or stepless variable. Users should be based on the actual needs of the project, according to the height of transmission distance and choose the outlet pressure; according to the ability to feed stirring, the choice of the output side volume; according to pumping concrete aggregate situation, choose the form of the dispensing valve. S-shaped swing pipe valve pressure loss during pumping, smooth concrete flow channel, but by limiting the diameter of a higher aggregate requirements, suitable for medium and high-pressure pump, suitable for high-rise buildings and concrete quality long-distance, high-lift transport; gate valve because of low demand for aggregate is 'eat whole grains' has said that the medium-pressure pumps used more often, pumping height of 100 meters, 300 meters level.
Starting from the motor power
A concrete pump motor power is to determine the amount of outlet pressure and delivery side a prerequisite under motor power in certain circumstances, increase the amount of pressure will make the delivery reduced; on the contrary, reducing the outlet pressure will make the delivery quantity increase. In order to ensure concrete pumps both have a larger throughput, but also a certain outlet pressure and the matching of economic power in the concrete pump's design, mostly using a constant power piston pump; that is constant power value Once selected, when the outlet pressure increases, the pump displacement volume is reduced automatically reach and power to design corresponding value; if necessary to achieve the outlet pressure is high, but also want the purpose of transmission capacity. The only way is to increase the motor power. Therefore, in the new national standards, citing the ability to index concept concrete pump (in MPa · m3 / h as the unit of measure); that is the actual pump delivery pressure and the amount of the actual export of concrete per hour, good product, the value, the more large, the greater its ability index, the greater the electrical power will, thus achieving large displacement, high lift purposes. I am in the design, functional design also uses a high voltage switch to meet the different construction requirements, economic status, but also have a greater transport capacity, or in the same motor power, resulting in a higher outlet pressure .

Disclaimer: concrete pump channel for publication of all the information does not represent or endorse the accuracy or reliability of its contents; You hereby acknowledge that any reliance risk information should be born of themselves.

Reason tower crane standard section cracks and how to respond

Tower crane tower in part by a chassis base section, reinforce highly festival, standard section, half section, of which, most likely to swap portfolio standard section is also very important component, in the course of this may occur that kind of problem, such as cracks, transverse cracks appeared following the situation on the last section of the tower crane slewing how to deal with:

The main reason for this rift is the irrational structure, leading to material fatigue yield stress concentration, the formation of cracks. In general this phenomenon tower crane time is not long, no more than six years, some might appear a year, this situation is generally what structure? Are generally turning back seat and welded connections with right-angle side and a standard rectangular section steel using double-sided welding, and the other at right angles to the side and turn back seat welding, have undercut phenomenon. So the structure is very important! Decided to transfer the force structure, layout structure determines whether a reasonable and smooth power transmission and power transmission direction.

Undercut is because the standard in the production engineering section welding irregularities caused undercut reduces the effective cross-sectional area of ​​the standard section of the base material, reducing the capacity of the steel structure, also causing stress concentration, and develop into a crack source, in this Under kinds of action material fatigue easily cause crack or fracture.

All production units using the unit and installation should pay attention to these safety problems, the installation of safety as the first element, must pay serious attention, safety consciousness. The use of units have the choice of quality manufacturers and avoid irrational use of poor quality products, strict adherence to the process of doing wrong practices, timely inspection maintenance, preventive measure to reduce accidents!

Concrete mixer introduced to enhance the work of the hopper

In the production process of the concrete mixer, concrete mixer hopper lift function is more important. Especially when the concrete mixer concrete manufacturing complete, finished products to be shipped under construction on the roof and other places. Thus it is necessary to rely on concrete mixer lifting hopper.

But this time it must mention also concrete mixer hopper lifting rope used. Their work intensity that we can not imagine. Therefore, the choice of concrete mixers hopper rope when lifting, not only to choose quality assurance. During use, but also pay special attention to this maintenance.
Lifting hopper concrete mixer, concrete batching plant frequency is relatively high, every day a lot of material transported to the roof, hundreds of kilograms of feed hopper, right, up and down hundreds of times a day, imagine their work intensity, rope It is the main wear parts, which is why the proper use and maintenance of wire rope obviously particularly important.
Concrete mixer raised to the mixer in hoisting rope through imports. Especially in today, whether roads or bridges, or on residential construction have been to the peak of the time, the use of concrete mixers will be more frequent, then it represents a frequency hopper lifting concrete mixer used will also increase.
So, good for lifting concrete mixer hopper rope maintenance is important work. This not only ensures that the concrete mixer profits, but also to ensure better production efficiency concrete mixer.

Tower crane driver safety rules introduced

1. The driver should be trained, familiar with mechanical structure and performance, you must be certified.
2. The driver shall not operate a non-driver and drink when sick nor operate.
3. When you begin, first issued a warning whistle, to draw attention.
4. After the factory overhaul and reassemble the tower crane dismantling, shall be tested. Confirm before use meet the technical performance.
5. Check the brake section before work, security and lubrication moieties, check the stopper, the safety devices are sensitive and reliable.
6. tower cranes must have a reliable grounding, electrical equipment should be properly connected to the housing body.
7. All safety devices and limit switches must be complete, sensitive and effective.
8. night operations, lighting must be good.
9. The strict implementation of "Ten is not hanging" operation, you must disable the tower crane hooks and changing trolley receive a predetermined position.
10. The tower crane with track may not have the obstacles and local subsidence phenomenon, more than six winds and thunderstorms, fog, stop job blurred.
11. A driver and signal by signal workers work closely with the command to work.
12. The driver in the shift to explain the device, the driver to take over the inspection and commissioning of the equipment to ensure safety to work properly, there must shift recording.
13. A group of tower crane job to avoid first tower Secretary attention to highly concentrated around, problems may arise, for timely processing.
14. operation of the control switch panel to zero, cut off the power and lock the brake boxes and operating rooms.

How to improve the productivity of concrete batching plant

Concrete batching plant after 20 years of development, technology becomes more mature, from the original low efficiency, high energy consumption and efficient development of low-power today, concrete batching plant market once again experiencing change, as now the real estate market boom sustained, concrete batching plant market also continues to heat up, and now gradually improving production efficiency batching plant, in the actual production of what other factors affecting productivity batching plant it?

Feeding time, stirring time and the material time, the user during use to check regularly butterfly and related electrical components to ensure smooth operation mechanism connected between the powder hopper and mixer is smooth, guaranteed feed

Normal time; for stirring time, the user should check the soundness of internal mixer blade lining, raw material put in place, put in the time period, the existence of the phenomenon axle affect the stirring effect and time; for the material time, the general increase in concretea hopper capacity of concrete out of the hopper or storage container designed to reduce the discharge time.

Users should be based on production capacity and transport distance batching plant, equipped with a sufficient number of vehicles, and will not produce too much concrete progress not timely shipping, the impact of the project.

To often batching plant equipment maintenance and management, so that the device is in the best working condition, routine maintenance checks for the existence of safety hazards in a timely manner, and to be eliminated to ensure the concrete batching plant to work safely and efficiently.

Hydraulic Cone Crusher features and technical advantages

Hydraulic efficiency hydraulic cone crusher has overrunning spring cone crusher and general hydraulic cone crusher is more advantageous:
1, crushing ratio, high production efficiency
The higher speed and stroke combination of the HP cone crusherrated power and capacity greatly increased, improving the crushing ratio and production efficiency.
2, the vulnerability of low consumption, low running costs
Reasonable structure, advanced crushing principle and technical data, reliable operation, low operating cost; all components have crusher wear protection, will reduce maintenance costs to a minimum, the general life can be increased by more than 30%.
3, lamination broken, excellent finished grain shape
By using a special intergranular laminating crushing chamber design principles and matching speed, to replace the traditional single particle crushing principle, to achieve selective crushing of materials, significantly improved product ratio and cube fines content, to a great extent reduced the flakiness materials.
4, hydraulic protection and hydraulic cavity clearing, high degree of automation, reduce downtime
Hydraulically adjustable discharge opening and crusher overload protection operation level has been greatly improved, and make maintenance easier, more convenient, less downtime; I plant cone crusher iron release the bidirectional hydraulic cylinders allow iron through crushing chamber, the aircraft in the event of excessive iron and transient nausea vehicle, the hydraulic energy from the top, automatic nesting, greatly reducing the original spring cone crusher downtime required for artificial nesting troubles, and many other manufacturers crusher it will shut down due to excessive iron death card.
5, rare lubrication, reliable advanced, improve life
Unique design of thin oil lubrication system, greatly improving the service life of equipment. High performance non-contact labyrinth seals wear, improve the reliability of blocking dust, eliminating the common faults of the original spring cone crusher oil mixed with water and other fundamentally.
6, a variety of crushing chamber, flexible, adaptable
Cone crusher simply replace fixed cone liner, dynamic cone liner, crushing cavity shape from standard coarse cavity to ultra-short head superfine cavity any change, adapt to a wide range of product size requirement.
7, maintenance is simple and easy to operate
Cone crusher and maintain all parts are removable from the top or side, convenient dynamic cone and fixed cone removable without dismantling the rack, fastening bolts, so routine replacement HP cone crusher liner more convenient. The use of a hydraulic motor, so that production efficiency crusher best.
8, which provides a higher production capacity, the best product shape, and easy automatic control, with maximum reliability and flexibility, really create more value for users.

Water injection to the reactor accident in Japan will use concrete boom pump

The 21st informed that Japan will use concrete boom pump to the Fukushima Daiichi nuclear power plant accident in the reactor water. After the truck boom extends up to about 58 meters, accurately to the waste water tank by remote control from a height.

It reported that the Japanese construction companies to provide triple County's three truck has arrived at the scene, Gifu County a truck company will also join. Defense Minister Kitazawa handsome said it would use all the same model in Japan pump, in order to ensure sustainable conduct water operations.

It is reported that Japan used truck production from Germany, the body is about 15 meters, used in the construction of the commons upward transport concrete. This pump has been used allegedly blocked the work of the Soviet Chernobyl nuclear reactor accident in the former.

Folding Boom can remote operation from 100 to 300 meters away. After the installation of cameras to the top of the boom, the staff according to the image on the display, the reactor building 30 meters from the ground, the hole formed by the explosion of water to the spent fuel pools. Allegedly 100 tons per hour can filling.

Provides two sets of pump of Yokkaichi, Mie Prefecture, central member of the construction machinery president Hasegawa Code, said: "can accurately be water in the intense radiation away from the plant hope in times of crisis to help you a hand.." He also expressed concern that: " rushed to the scene as the operator of three members will be afraid of radiation. no problem, right? "