When the concrete pump is in operation, if it is used improperly, it will easily lead to premature failure of some parts of the pump, which not only increases the maintenance cost of the equipment, but also seriously affects the production. How to improve the service life of concrete pump wearing parts is worth exploring. 1. Cutting ring and glasses plate The cutting ring and the glasses plate are a pair of tightly fitting parts with relative movement, and the contact faces of the two are welded with a layer of wear-resistant material, and the gap between the two can be adjusted through the special-shaped nut at the end of the S-shaped spline shaft ( 0.1 to 0.2) mm. A rubber spring fitted between the S-shaped tube and the cutting ring allows the cutting ring and the eyeglass plate to move relative to each other flexibly. As the use time prolongs, the rubber spring loses its elasticity, and the joint surface of the cutting ring and the eyeglass plate will wear, resulting in an increase in the gap between the two. When the gap is >0.7mm, it needs to be adjusted immediately, otherwise the pumped mortar will enter by the "gap". Once the mortar enters the friction surface, the wear rate of the cutting ring and the glasses plate will be greatly accelerated. When pumping concrete, the cutting ring swings with the swing of the S-shaped tube, which plays the role of cutting concrete. Therefore, the cutting ring wears faster, and the higher the pressure of the concrete at the exit, the more serious the wear of the cutting ring. Typically, the wear of the cutting ring occurs first at the edge and at two symmetrical locations at an angle of 90° to the top. Therefore, when the above part of the cutting ring is worn, the cutting ring can be rotated at an angle and then continue to be used, which is equivalent to doubling the service life of the cutting ring. The wear of the eyeglass plate occurs first at the middle nose bridge, and the larger the gap between the eyeglass plate and the cutting ring, the faster the wear rate. Therefore, it is necessary to pay attention to the gap between the glasses plate and the cutting ring at all times. Once the gap is found to increase, it is necessary to immediately tighten the profile nut or replace the wear parts to prevent the mortar from entering the friction surface. When the rubber spring loses its elasticity, it needs to be replaced immediately. For the repairable cutting ring and the glasses plate, the D507 electrode can be used after repair welding. 2. Piston and delivery cylinder The piston is generally made of polyurethane material, which is more elastic and wear-resistant, and the inner wall of the conveying cylinder is also plated with wear-resistant material. There are two kinds of lubrication methods between the piston and the delivery cylinder: one is automatic lubrication, one for each pumping, the refueling system automatically adds one lubricating oil; the other is the manual refueling system, which requires manual refueling. For the automatic refueling system, it is necessary to regularly check whether the oil passage is unblocked, otherwise the piston and the conveying cylinder will be sharply worn once the oil passage is blocked; for the manual refueling system, the operator should replenish the lubricating oil regularly according to the working environment, usually 1 Times / h. Remember: When refueling, be sure to jog the piston to the lower part of the vertical refueling point so that the lubricant just enters the oil groove in the middle of the piston. During the pumping process, the operator should also perform the "cry-cylinder" operation frequently, that is, when the main cylinder piston runs to the end point, operate the jog button for 5-8s to supplement the hydraulic oil of the main cylinder to close the oil chamber (for relying on For the pump that is close to the switch reversing, the proximity switch should be as close as possible to the side of the main cylinder) to make full use of the stroke of the delivery cylinder to avoid local wear of the delivery cylinder. The operator should also pay close attention to the water tank. Once the water is found to be turbid or there is sand in the water, the piston may be worn and the piston needs to be replaced in time, otherwise the piston and the delivery cylinder will be aggravated. If the water becomes turbid quickly after replacing the new piston, it indicates that the delivery cylinder is worn and the transfer cylinder needs to be replaced. If conditions permit, the cylinder can be judged by the method of measuring the bore diameter. Under normal circumstances, the thickness of the chrome plating on the inner wall of the cylinder is only (0.2 ~ 0.25) mm. When the bore diameter is increased (0.45 ~ 0.55) mm, it needs to be replaced. Cylinder. In addition, the water temperature of the cooling water in the water tank is also very important. The water temperature is too high, which will also aggravate the wear of the piston. The cooling water in the water tank needs to be replaced frequently. 3. Conveying pipeline When taking over, be sure to pick up from the outlet of the pump, that is, from front to back. Do not connect the two ends first, then connect the middle. Incorrect connection will cause "internal forces" between the pipes, and it is easy to cause the pipe to break from the joint during pumping. After the pipeline is connected, the outlet of the pump, the elbow, and the suspended space of the pipeline must be fixed firmly to prevent the pipeline from damaging and damaging the pipeline. Because the closer to the pump, the higher the pressure of the concrete in the pipeline, the new pipe with a thick wall is used at the outlet of the pump, and the old pipe with a thin wall is used farther away from the pump, which can improve the use of the pipe. Life expectancy while reducing the possibility of squib. For elbows, the most serious wear is away from the side of the pump. It is advisable to use the elbows often to extend the service life. 4. Discharge port, conical tube, distribution valve For consumable parts such as discharge port, conical tube, distribution valve, etc., once the wear layer is found to be worn away, it can be used for a period of time by surfacing with D507 electrode. Due to the different working conditions of various construction sites, such as the level of concrete, the distance of pumping, and the height, the service life of wearing parts such as cutting rings and glasses plates varies greatly at different construction sites, but as long as they are properly used and treated, the pumps are used. The service life of the consumables can be greatly extended. Concerned about surprises Label: How to improve the service life of concrete pump wearing parts Previous: Selection of motor protector Next: Impact crusher structural features
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