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? "

Some concrete batching plant equipment related features

Demolition concrete batching plant will encounter a lot of related equipment, we understand these devices only after a series of things to know how correct handling the demolition, and after the installation and so on. Today, we start to understand some of the relevant characteristics of the overall device.

Concrete batching plant equipment is a mixing console, material weighing system, material handling systems, material storage system, the control system of the five components of the system and other ancillary facilities consisting of building materials manufacturing equipment, and its main job is to cement the principle of cementing material, The sand, lime, cinders and other raw materials were mixed and stirred, and finally made into concrete, as the wall material into the construction of production. Concrete batching plant since been put into use in China's building materials industry has played an important role, of course, this is also the concrete batching plant itself has superior characteristics of the decision.
Concrete batching plant equipment is divided into sand feed, powder feed, water and feed additives, transmission stirring with four parts storage, equipment Tongshen overall steel casting, high-quality H-beams not only look beautiful, but also enhance the overall structural strength of concrete batching plant equipment easy to install, it can be applied to a variety of complex terrain structures.
Concrete batching plant equipment with good stirring performance, the device uses a spiral twin-shaft forced mixing console, not only the mixer can be strong, to dry hard, plastic and various proportions of concrete are able to achieve a good mixing effect. Stir and high efficiency.
Concrete batching plant equipment not only has excellent mixing console, also has a variety of sophisticated accessories, such as screw conveyor, metering sensors, pneumatic components, these components ensure that the concrete batching plant during operation with high reliability, precise measurement skills and long service life. At the same time, concrete batching plant all maintenance parts are seized with a catwalk or ladder, and has enough room to maneuver, mixing console can be equipped with high-pressure automatic cleaning system has a function starvation and over-temperature alarm function, easy to equipment maintenance.
Concrete batching plant equipment has a good environmental performance, the machine running the process, powder manipulation are within the full blockade of the system, high-efficiency dust collector tank pink / mist spray and other methods greatly reduce the dust pollution of the environment, while concrete batching plant for pneumatic systems and unloading equipment are used exhaust muffler device effectively reduces noise pollution.
Demolition concrete batching plant must not damage these devices, known batching plant equipment these features, we also can be handy in the demolition of more time, and we can more fully use these devices in the future use of the process.