Explain in detail driving brakes

     drum lifter is an intermittent motion mechanism, it's work is characterized by frequent starting and braking, therefore brake work in Jinan traffic in both devices is the role of the safety device has three brakes: Support, Stop, drop weight.
     Typical driving braking device consists of the bottom plate, brake drum, brake shoes, wheel cylinders, a return spring, the positioning pins and other component parts. Plate mounted in a fixed position on the axle, which is stationary, the above equipped with brake shoes, wheel cylinders, a return spring, the positioning pin, receiving a rotational torque braking. each drum has a pair of brake shoes, with a friction lining on the brake shoes brake drum is mounted on a hub on the wheel is rotated together with the components, which is made of a certain amount of iron, shaped like a drum circle. when braking, the wheel cylinder piston driven compression brake drum brake shoes, brake drum by friction reducer, forcing the wheels stop turning.
     On the brake drum, usually only one wheel cylinder, brake master cylinder from the wheel cylinder by hydraulic, the wheel cylinder to the left and right ends of simultaneously top end of the piston brake shoe hoof, force equal, but because the wheel is rotating, brake drum brake shoe pressure acting on the left-right asymmetry, resulting in their own self-energizing or minus force. Therefore, the industry side of the self-energizing brake shoe called the leading shoe, cut themselves side of the force from the brake shoe called hoof, hoof collar friction torque is 2 to 2.5 times from the hoof, the two brake shoe friction linings wear are not the same.

SSDHL electric chain hoist

SSDHL electric chain hoist, After driving beam welding forming, overall length is shortened, driving beam in hand soldering shutout head plate, stiffeners, the weld longitudinal shrinkage, so that driving beam is shortened, more stiffeners, shorten more. A stiffener reached weld after the height requirements, approximately shrink about 1 mm, so the driving beams when given the total length, should be fully considered stiffeners number, plus the stiffener welding after contraction spacing vertical driving beam at both ends of the cut should be cut line outside the office, so that no dicing lines. after the above treatment, the total length of the driving beam to meet the requirements.

Causes of driving several variations of injury

     Driving is a modern industrial production 50 ton electric chain hoist, are widely used in lifting, transport, handling, and installation of various items of work for increasing labor productivity, play a huge role, and Shandong in the use of traffic there will inevitably be deformed, the following causes of traffic on the deformation and deformation may occur for analysis:
     1, trolley manualthe next bend. Because of traffic on both sides of stiffener beam welding finished weld cooling contraction, resulting in different internal stress, and the formation of lateral bending. Correction lateral bending triangular heating method, the horizontal flange plate correction, heating position when the election in the convex side of the horizontal flange plate, heated to a red triangle, cold water to cool quickly, by the contractile force to achieve the purpose of correction.
     When the vertical plate rigidity is large, the board may consider appropriate in the road vertical and horizontal position of the linear heating plate, the purpose is to reduce the role of the board to contain the horizontal flange plates. When one does not rectified, could close next continues heating correction, to avoid overlap the previous.
     2, arched. Camber deformation more material cut by the material, the heat caused by uneven. When the driving assembly is completed, because the web is wide, the upper and lower flange plates contain, triangular heating method, there is no effect. Therefore, prior to assembly staff must, to carefully examine the web, web correction after passing to assemble, otherwise, wasted time, money, and corrective effect is not obvious, the formation of defects.

Driving common troubleshooting methods

     In lane use, if there is easy outages phenomenon sometimes occurs in the transmission conduit spark some serious blasting trolley line, "resulting collector replacement too frequently, affecting production this end, the following electric hoist and trolley:
     An increase between two opposing collector brush spring strength, flexibility, ensure that the spring recovery freely;
     Second, increasing the collector brush chamfered and polished smooth;
     Third, deepen reinforcement collector in the spring seat, spring is not easy to ensure the recovery of the brush "bit string" at work.;
     Fourth, the two security trolley line connecting block connections have chamfered to ensure a smooth transition collector. At the same time, in order to ensure the normal use of safety trolley line, the standard operating road workers, maintenance workers of regular maintenance, periodic inspection also essential.

Technical types of crane design

     It can be said bridge cranesinvention greatly liberated the labor force, it reduces human labor, plays an extremely important role in the construction, transportation and industry. Although we are familiar with on the crane, but really not many people understand the crane. I professional development, production and sales of cranes, in order to allow our customers to better understand our products, here to tell you about the type of technology designed crane.
     First, the development of the design: the application of mature design experience or have viable new technologies, new crane design, including functional design and mechanical design.
     Second, the upgrade design: The upgrade of the existing crane design based on experience and technology development in order to improve performance, reduce manufacturing costs or reduce operating costs.
     Third, the derivative design: In order to meet the new needs of the gantry cranes as part of the modifications or deletions, which developed from the standard type of derivative products.
     Fourth, the serial design: in a crane as female, design a series of similar shape with the same function, but power, tonnage, dimensions are different range of products.

Crane routine maintenance items

    electric winch is a heavy mechanical handling equipment, Shandong Crane in everyday use, in order to avoid accidents, we should pay attention to the daily maintenance items from small series to introduce you to the following routine maintenance items crane:
     The first is the crane pulley overhaul: pulley cover should be installed securely, no damage or significant deformation; pulleys rotating flexible, clean smooth no cracks, no defects rim part, no damage rope defects; uneven wear volume 3mm round slot or when the wall thickness of the wear volume of the original wall thickness of 20%, or round bottom groove diameter is reduced to 50% capacity wire rope diameter pulley should be scrapped.
     Secondly, is the strong electric winch hook overhaul: the amount of wear hook dangerous section shall not exceed 10% of the original size of the board hook bushing wear amount should not exceed 50% of the original size, the mandrel shall not exceed the original amount of wear. 5% of the size of; the surface should be smooth, without break, acute defects and other defects are not allowed on the hook welding; danger the lower section of the hook and undercut the tail section of the threaded portion of the non-hook cracks; hook should rotating flexible, bolts, cotter pins, etc. must be tightened intact.
     Finally, the maintenance of the crane rope: rope ends fixed platen should ≥2 months; rope length must ensure that the hook lowest position (including pit), the remainder left on the roll of rope less than 3 laps; wire rope should no kink, dead, hard curved, plastic deformation, such as hemp core prolapse severely deformed, lubrication condition.

Line daily management measures hanging

     Line hanging as an important architectural works of lifting equipments, in order to ensure the safety of everyday use, the relevant line hanging units must develop a good use of appropriate management practices. Here in Shandong line hanging our sales and after-sales experience for everyone daily management measures introduced hanging downward:
     First, everyone should carefully check the vehicle in front of machinery and equipment, spare parts and security guards the integrity and reliability. If the main accessory controller, brake brakes, bells, emergency switches and other failures, should be promptly addressed.
     Second, the members must obey the command signal, but anyone issued an emergency stop signal line hanging, should immediately stop the running time between the crane and the crane, to maintain a certain distance.
     Third, the driver must be in the command signal, only to confirm the operation, before the driver should-ringing, when approaching the winch, limit the size of the car driving near the end or close to each other, slows down.
     Fourth, safe passage should provide special sites or escalator, walk up and down. In addition to repair rail cars were not allowed to go out for a walk both sides. Walking railcar is strictly prohibited. Allowed to cross from one line to another line hanging hanging.
     Fifth, when the line stopped gantry cranes, lifting objects shall not be suspended in the air. During the operation, floors or warning bell should hang out. Disable items at the top of people's heads.
     Six, maintenance line hanging when looking for a safe place to tilt, turn off the power, hang warning signs. Ground fencing and hanging the "no entry" signs.
     Seven, became a tonnage heavy objects, you should try hanging slightly off the ground, in order to confirm the suspension stability, good brakes, and then rise slowly run. Not handle three control operations.
     Eight, line hanging sudden power outage, you need to switch lever to "0". Driver can not leave the cab when not lay down or unlock pieces.
     Nine, in case of open-air line hanging storm, lightning, or six more than the wind should stop working, turn off the power, the front and rear wheels should match the pad cards firmly.

double girder

double girderof mechanical, electrical and metal structure consists of three parts. Double girder cranes in the indoor and outdoor industrial and mining, iron and steel industry, railways, ports and logistics flow and other departments and establishments have been widely used. There are double girder crane mechanical parts, consisting of a metal part and the electrical part of the structure. following on from the small series for you  crane mediated mechanism.
     A mechanical parts: three agencies that vertical lifter, trolley traveling mechanism and traveling mechanism lifting mechanism is used to vertically goods, trolley traveling mechanism is used to move laterally with a load; carts run. agency for the lifting trolley and articles for longitudinal movement, in order to achieve a three-dimensional space to do with the handling, loading and unloading cargo.
     Second, the structural part of the metal: the bridge and small frame components.
     Third, the electrical parts: the electrical equipment and electrical wiring components.