Jining Jiuzhong Machinery Equipment Co., Ltd. Sales Department

Liquid injection gun
The liquid injection gun is a constant pressure liquid injection gun suitable for single hydraulic props in coal mines. The liquid injection gun consists of a liquid injection nozzle, a snap ring liquid inlet pipe, a gun body, a differential piston, a control ejector rod, an adjusting nut, a manual device, a spring, etc. A differential piston is used to lock the ejector rod and open the liquid inlet valve. The locking method is mechanical. When the initial supporting force of the single hydraulic prop reaches the specified value, the differential piston automatically unlocks through hydraulic differential and closes the liquid inlet valve. The inlet valve can also be closed by manual device. The constant pressure liquid injection gun can adjust the size of the spring force by adjusting the nut and adjust the initial support force of the single hydraulic support.
Technical performance of liquid injection gun
, working pressure
, handle force during liquid injection
, working medium containing %% emulsion
Liquid injection gun is suitable for coal mines Single hydraulic prop. It consists of a gun body, a liquid supply pipe, an operating handle, a liquid supply check valve assembly, a liquid supply ejector rod, a liquid inlet and outlet check valve assembly, a locking sleeve and a liquid injection pipe connected to the gun head in sequence. The gauge joint connects the pressure gauge and the gun body to form a micro gauge assembly, allowing the pressure gauge to be read perpendicularly to the human line of sight, which facilitates reading, disassembly and assembly by reaming the front section of the inner diameter of the liquid injection pipe and deepening the depth of the sealing ring groove. , which reduces the impact of the pressure fluid on the sealing ring and prevents the sealing ring from being washed away when dirt is washed away from the filling nozzle. The micrometer component changes the original complex overflow display and cancels the check valve set in the original liquid supply pipe, greatly simplifying the structure, reducing weight, simple operation, small size, light weight, low cost, and good effect. Has wide practicality.
A liquid injection gun used for mining single hydraulic props, including a valve body, a locking sleeve, a handle, a push rod, an isolation sleeve, a one-way valve seat, a steel ball, a spring, a compression screw, and an outlet. The liquid port is connected to the liquid inlet pipe with a joint at the rear end of the valve body. The handle is connected to the valve body through a pin. The isolation sleeve, one-way valve seat, steel ball, and spring are sequentially installed in the rear part of the valve body. It is in There is a liquid groove on the valve body, and the outside of the liquid groove is sealed by a sealing plate. There is a forward liquid hole in the front of the valve body, and a rear liquid hole and a semicircular arc flow groove are provided on the isolation sleeve. The forward liquid hole is It is connected to the rear liquid inlet hole through the liquid groove, and the processing technology is relatively simple. It has the characteristics of compact structure, small volume, and good sealing performance.
Working principle of the liquid injection gun
Insert the initial support liquid injection gun into the three-way valve body, tighten the locking sleeve, hold the operating handle inside, drive the liquid supply ejector, and open the liquid supply One-way valve, high-pressure fluid is supplied to the pressure gauge all the way, and injected into the lower cavity of the pillar through the inclined hole in the upper chamber of the high-pressure release device, the liquid injection pipe, and the three-way valve, forcing the living column of the pillar to rise. When the upper end of the pillar contacts the top beam , close to the roof. Depending on the index of the pressure gauge, if the pressure reaches the specified roof pressure of this working surface, the liquid supply will be stopped immediately, the handle will be pushed out instantly, the pressure relief ejector will be driven, the pressure relief check valve will be opened, and the high-pressure liquid will be discharged through the release hole. The pressure inside the gun is zero and the gun can be taken out smoothly.
Storage
① When storing the safety valve, the liquid in the clean cavity should be removed, cleaned, and coated with low-condensation anti-rust hydraulic oil
② At the same time, plug the inlet and return ports with plastic plugs. And place it in a clean and dry place
Factory address Liying Industrial Park, Rencheng District, Jining, Shandong
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