Pulsation-free wet spraying machine

Abstract

A pulsation-free wet spraying machine resolves the issue of pulsing during pumping of a concrete spraying machine The wet spraying machine includes a frame, a pumping mechanism, a swing mechanism and a hydraulic system, wherein the pumping mechanism includes a hopper, a material chamber, a concrete feeding mechanism, an auxiliary feeding mechanism and a distribution valve. The hopper of the pumping mechanism is disposed above the material chamber. The distribution valve is disposed inside the material chamber, the concrete feeding mechanism and the auxiliary feeding mechanism both include a hydraulic cylinder, a concrete piston and a concrete cylinder, a discharge pipe is a three-way pipe fixed at a side surface of the material chamber, an auxiliary discharge pipe of the discharge pipe is connected with an auxiliary concrete cylinder, and a through hole is disposed on the auxiliary concrete cylinder. The swing mechanism includes a swing hydraulic cylinder, a swing arm and a swing hydraulic cylinder base, an auxiliary piston rod of the auxiliary feeding mechanism passes through a mandrel to push an auxiliary concrete piston to move inside the auxiliary concrete cylinder. In addition, the pulsation-free wet spraying machine stably feeds a material, has a compact structure, and is wear-resistant.

1 . A pulsation-free wet spraying machine, comprising a frame, a pumping mechanism, a swing mechanism and a hydraulic system,
 wherein the pumping mechanism comprises a hopper, a material chamber, a concrete feeding mechanism, an auxiliary feeding mechanism, a distribution valve and a discharge pipe, the hopper is disposed above the material chamber, the concrete feeding mechanism comprises two main hydraulic cylinders, two concrete pistons and two concrete cylinders, the auxiliary feeding mechanism comprises an auxiliary hydraulic cylinder, an auxiliary concrete piston and an auxiliary concrete cylinder, and the concrete cylinder of the concrete feeding mechanism is in communication with the material chamber; the distribution valve is disposed inside the material chamber and in communication with the concrete cylinders and the discharge pipe; and the distribution valve friction plate is connected with the distribution valve; the discharge pipe is disposed on the material chamber, the discharge pipe is a three-way pipe comprising an auxiliary discharge pipe and a main discharge pipe, the auxiliary discharge pipe is connected with the auxiliary concrete cylinder on which an air hole is disposed, and an auxiliary piston rod of the auxiliary feeding mechanism passes through a mandrel to push the auxiliary concrete piston to move inside the auxiliary concrete cylinder;   the swing mechanism comprises a swing hydraulic cylinder, a swing arm and a swing hydraulic cylinder base, the swing hydraulic cylinder base is mounted at an outer side of the material chamber, the swing hydraulic cylinders are symmetrically arranged at both sides of the swing hydraulic cylinder base, and the swing arm is hinged with the swing hydraulic cylinders; the swing arm is mounted through a spline in cooperation with the mandrel;   the motor/hydraulic system comprises a hydraulic oil tank and a motor, and the pumping mechanism, the swing mechanism and the hydraulic system are all disposed on the frame;   the concrete piston of the concrete feeding mechanism retracts inside the concrete cylinder to suck material into the concrete cylinder, and the piston rod pushes the concrete piston to push the material out of the concrete cylinder and transport the material to the discharge pipe through the distribution valve; when the concrete feeding mechanism pushes the material, the auxiliary concrete piston of the auxiliary feeding mechanism retracts inside the auxiliary concrete cylinder to help suck the material from the auxiliary discharge pipe, so that the material in the auxiliary concrete cylinder is pushed to the discharge pipe when the distribution valve swings; the auxiliary concrete piston in the auxiliary concrete cylinder pushes the material, baffle plates at both wings of the distribution valve friction plate block outlets of two concrete cylinders.   
     
     
         2 . The pulsation-free wet spraying machine according to  claim 1 , wherein the concrete piston is disposed at an end of a hydraulic cylinder piston rod of the concrete feeding mechanism and moves inside the concrete cylinder; the auxiliary concrete piston is disposed at an end of the auxiliary piston rod of the auxiliary feeding mechanism and moves inside the auxiliary concrete cylinder. 
     
     
         3 . The pulsation-free wet spraying machine according to  claim 1 , wherein the material chamber is disposed below the hopper and in communication with the hopper, two main hydraulic cylinders of the concrete feeding mechanism are arranged in parallel at side surface of the material chamber, the main hydraulic cylinders are mounted on a water rinsing bath, and the auxiliary hydraulic cylinder is mounted above the main hydraulic cylinders. 
     
     
         4 . The pulsation-free wet spraying machine according to  claim 1 , wherein a distribution valve, a front friction plate, a rear friction plate, a distribution valve friction plate, a rubber spring and a sealing ring are disposed inside the material chamber, the front friction plate is disposed at a front end of the distribution valve, the distribution valve friction plate is disposed at a rear end of the distribution valve, the rubber spring is disposed between the distribution valve friction plate and the distribution valve, and the sealing ring is disposed between the distribution valve and the front friction plate; and the distribution valve friction plate and the rear friction plate are in close contact. 
     
     
         5 . The pulsation-free wet spraying machine according to  claim 4 , wherein one through-hole is disposed on the front friction plate, and two through-holes are disposed on the rear friction plate. 
     
     
         6 . The pulsation-free wet spraying machine according to  claim 1 , wherein the mandrel is square in the middle and circular at both ends, the mandrel is mounted through a mandrel cover in cooperation with a fitting slot at an upper part of the distribution valve, and the mandrel cover is fixed with nuts; the distribution valve swings along with the mandrel. 
     
     
         7 . (canceled) 
     
     
         8 . (canceled)