1. Cut ring and eyeglass plate

Cutting ring and glasses plate are a pair of closely matched parts with relatively moving parts. The contact surfaces of both are welded with a layer of wear-resistant material. The gap between them can be adjusted at (0.1 ~ 0.2)mm through the special-shaped nut at the end of the spline shaft of s-shaped tube.The rubber spring between the s-shaped tube and the cutting ring enables the cutting ring and the eyeglass plate to move flexibly relative to each other. 

With the extension of time, the joint surface of cutting ring and glasses plate will be worn, which will lead to the increase of the gap between them.When the gap > 0.7mm, it should be adjusted immediately, otherwise the pumped mortar will enter by "gap".Once the mortar enters the friction surface, the wear rate of cutting ring and glasses plate will be greatly accelerated.

Therefore, it is necessary to always pay attention to the gap between the glasses plate and the cutting ring. Once the gap is found to increase, it is necessary to tighten the special-shaped nut or replace the worn parts immediately.When the rubber spring loses its elasticity, it needs to be replaced immediately.

2. Piston and delivery cylinder

The piston is generally made of polyurethane, which is elastic and wear-resistant. The inner wall of the conveying cylinder is also plated with wear-resistant materials.There are generally two types of lubrication between the piston and the delivery cylinder: one is automatic lubrication, each pump once, the lubrication system automatically add a lubricating oil;The other is the manual refueling system, which requires manual refueling on a regular basis.For automatic refueling system, it is necessary to check whether the oil route is smooth regularly.For the manual refueling system, the operator should supplement the lubricating oil regularly, usually 1 time /h.

Operators should also pay close attention to the water tank, once found that the water has been cloudy or there is sand in the water, indicating that the piston may wear, need to replace the piston in time.If the replacement of a new piston, the water quickly become cloudy, it indicates that the cylinder has been worn out, need to replace the cylinder.In general, the thickness of chrome plating layer on the inner wall of the cylinder is only (0.2 ~ 0.25)mm. When the cylinder diameter increases (0.45 ~ 0.55)mm, the conveying cylinder needs to be replaced.

3. Pipeline

Take over, must pick up from the pump outlet, that is, from the front to the back, must not first pick up two ends, and then the middle.

Because the closer to the pump, the higher the pressure of concrete in the pipe, so in the pump outlet to use the wall thickness of the new pipe, the wall thin old pipe used in the distance from the pump, which can improve the service life of the pipe, at the same time reduce the possibility of pipe explosion.

4. Discharge port, conical pipe and distributing valve

For vulnerable parts such as discharge port, conical pipe and distribution valve, once the wear-resistant layer is found to be worn off, surfacing welding with D507 electrode in time can still be used for a period of time.

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