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 is disposed above the material chamber, the concrete feeding mechanism and the auxiliary feeding mechanism each include a hydraulic cylinder, a concrete piston and a concrete cylinder, the concrete cylinder of the concrete feeding mechanism and an auxiliary concrete cylinder of the auxiliary feeding mechanism are both connected with the material chamber, a discharge port is disposed on the material chamber, sealing between the distribution valve and the discharge port is provided by a sealing ring, the distribution valve is disposed inside the material chamber, a front friction plate and a rear friction plate are further disposed inside the material chamber, the swing mechanism includes a swing hydraulic cylinder, a mandrel, a swing arm and a swing hydraulic cylinder base, and the mandrel drives the distribution valve to swing. 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 port, the hopper is disposed above the material chamber, two concrete cylinders of the concrete feeding mechanism are in communication with the material chamber, and an auxiliary concrete cylinder of the auxiliary feeding mechanism is in communication with the distribution valve in the material chamber; the distribution valve is disposed inside the material chamber, a front end of the distribution valve is in communication with the discharge port, and a rear end of the distribution valve is in communication with the concrete cylinders and the auxiliary concrete cylinder in a swinging process;   the swing mechanism comprises a swing hydraulic cylinder, a mandrel, 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 motor/hydraulic system are all disposed on the frame;   in a swinging process of the distribution valve, the rear end of the distribution valve is always in communication with the auxiliary concrete cylinder, and the front end of the distribution valve is always in communication with the discharge port; the concrete cylinder of the concrete feeding mechanism sucks a material from the material chamber, the concrete feeding mechanism pushes the material in the concrete cylinder to the distribution valve through the concrete piston, so that the material reaches the discharge port through the distribution valve; when any of the concrete cylinders pumps the material, the auxiliary concrete piston in the auxiliary concrete cylinder retracts to enable the auxiliary concrete cylinder to suck the material from the distribution valve; when the distribution valve swings, the material in the auxiliary concrete cylinder is pushed to the distribution valve; when 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 the concrete cylinders.   
     
     
         2 . The pulsation-free wet spraying machine according to  claim 1 , wherein the concrete feeding mechanism comprises main hydraulic cylinder, a concrete piston and a concrete cylinder, and a piston rod of the main hydraulic cylinder pushes the concrete piston to move inside the concrete cylinder; the auxiliary feeding mechanism comprises an auxiliary hydraulic cylinder, an auxiliary concrete piston and an auxiliary concrete cylinder, and an auxiliary piston rod of the auxiliary hydraulic cylinder pushes the auxiliary concrete piston to move inside the auxiliary concrete cylinder. 
     
     
         3 . The pulsation-free wet spraying machine according to  claim 2 , wherein the hopper is mounted above the material chamber, the concrete feeding mechanism and the auxiliary feeding mechanism are arranged at a side surface of the material chamber, the main hydraulic cylinder is 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 rear friction plate, a distribution valve friction plate, a rubber spring, a sealing ring and a front friction plate are disposed inside the material chamber, the rear friction plate and the distribution valve friction plate are sequentially disposed between the concrete cylinder of the concrete feeding mechanism and the distribution valve, the rubber spring is disposed between the distribution valve friction plate and the distribution valve, baffle plates are disposed at both wings of the distribution valve friction plate, and the sealing ring is disposed between the distribution valve and the front friction plate; the distribution valve friction plate and the rear friction plate are in close contact. 
     
     
         5 . The pulsation-free wet spraying machine according to  claim 1 , wherein an opening of the front end of the distribution valve is in a shape same as a shape of the discharge port swept by swing of the distribution valve, a shape of an upper part of an opening of the rear end of the distribution valve is same as a shape of the auxiliary concrete cylinder swept by the swing of the distribution valve, and a shape of a lower part of the opening of the rear end of the distribution valve is same as a shape of the concrete cylinder swept by the swing of the distribution valve. 
     
     
         6 . (canceled) 
     
     
         7 . The pulsation-free wet spraying machine according to  claim 1 , wherein the front friction plate is disposed between the distribution valve and the discharge port, and the distribution valve friction plate and the rear friction plate are disposed between the distribution valve and the concrete cylinder of the concrete feeding mechanism; one through-hole is disposed on the front friction plate, and three through-holes are disposed on the rear friction plate; the distribution valve friction plate and the rear friction plate are in close contact. 
     
     
         8 . (canceled) 
     
     
         9 . (canceled)