Reciprocating pneumatic valve, air cylinder with same and grease pump

Abstract

The invention relates to a pneumatic valve, in particular to a reciprocating pneumatic valve, an air cylinder with the reciprocating pneumatic valve and a grease pump. The reciprocating pneumatic valve comprises a main valve body, a reversing core rod, a left valve body and a right valve body. The left valve body and the right valve body are fixed to the two sides of the main valve body correspondingly. The reversing core rod is movably installed in a reversing core hole of the main valve body. The reciprocating pneumatic valve is simple in structure, reliable in operation, low in machining cost and convenient to use. The air cylinder achieves automatic reciprocating and is simple in structure and practical, a reversing valve and intake and exhaust channels are separated from a piston anddo not occupy the movement space of the piston, the air cylinder is rapid in response, small in occupied space, small in volume, low in manufacturing cost, low in energy consumption and long in service life, the seal effect of the air cylinder and the seal effect of the reciprocating pneumatic valve are good, and assembly and maintenance are convenient. The grease pump is simple and reliable in structure, achieves simultaneous oil suction and oil filling and is not prone to blockage, oil suction and oil filling are not influenced by the temperature, and the efficiency is high.

Description

technical field [0001] The invention relates to a pneumatic valve, especially a reciprocating pneumatic valve and a cylinder and a grease pump using the valve. Background technique [0002] The piston linear reciprocating cylinder uses compressed air as the energy source, converts the compressed air energy into mechanical energy, and is used as a reciprocating actuator in the pneumatic system. The function of the cylinder is to overcome the load and drive the component to move. [0003] Cylinders in the prior art mainly contain two kinds of single-acting cylinders and double-acting cylinders, and the air valves controlling the movement of the pistons of these cylinders are independent of each other. The single-acting cylinder intakes air on one side of the cylinder, and the piston is reset by the spring thrust set on the other side of the cylinder, and the automatic reciprocating movement of the piston cannot be realized under the inflated body of the cylinder; the double-ac...

AI Technical Summary

Problems solved by technology

The single-acting cylinder intakes air on one side of the cylinder, and the piston is reset by the spring thrust set on the other side of the cylinder, and the automatic reciprocating movement of the piston cannot be realized under the inflated body of the cylinder; the double-acting cylinder needs to constantly change the position of the cylinder The reciprocating motion of the piston can only be realized by the direction of intake and exhaust, and the operation process is complicated

[0004] Therefore, when these two types of cylinder drive components are used to perform reciprocating linear motion, they usually need to be connected with a special automatic control system to achieve, resulting in a complex structure of the cylinder system and high manufacturing costs.

[0005] In the current automatic reciprocating cylinder, the reversing valve and the intake and exhaust pipelines are all located outside the cylinder, which makes the shape of the cylinder complex, takes up a large space, is inconvenient to install, and costs a lot.

It cannot be used in places where the space is particularly small, and there are many connection points of the intake and exhaust pipes, that is, there are many leakage points, and the maintenance is more complicated.

[0006] Such as the automatic linear reciprocating cylinder disclosed in Chinese patent CN103256273A, it controls the gap between the first air chamber, the second air chamber and the third air chamber through the valve core, the valve core positioning device and the valve core reversing device arranged on the piston. The connection relationship realizes the automatic reciprocating linear motion of the piston under the condition of continuously inflating the cylinder and without other control equipment, but it places the valve on the piston head, so that the inner cavity of the cylinder is impacted when it moves. The motion stability is poor, the internal structure is too complex, the processing cost is too high, and the performance is unstable

[0007] Most of the existing butter pumps use the method of squeezing out the oil. After the oil in the liquid state flows naturally into the oil inlet at the bottom of the outer sleeve of the butter pump, the inner coin at the bottom of the outer sleeve is equipped with a lifting plate to squeeze the oil through. The power is pumped to the outside world, such as the pneumatic butter pump announced by Chinese patent CN201884914U, which includes a distribution gas and an air chamber cover assembly. The top of the distribution gas is connected to one end of the air pipe, and the other end of the air pipe is connected to the air chamber cover assembly; the air chamber cover assembly includes The air chamber cover, the air chamber cover is provided with an air distribution paper cushion, an air distribution valve seat, and a limit plate in sequence from the inside to the outside, and the air distribution slider is arranged in the limit plate; The hexagonal screws fix the damping spring, the limit plate, the air distribution valve seat and the air distribution paper pad in the air chamber cover; the damping spring is set on the air distribution slider; the air chamber cover is fixedly connected by the hexagon socket head On the upper part of the distribution body, the air chamber cover assembly is fixedly connected with the distribution body. The grease pump adopts the oil inlet method of naturally flowing into the oil inlet. This oil inlet method is affected by the fluidity of the oil. If the oil flow is low temperature When the performance is poor, the oil cannot naturally flow into the oil inlet, and the lifting plate on the grease pump cannot transport the oil to the top. Such a grease pump cannot be used in a low temperature environment. Wear and tear causes the butter pump to fail and cannot work normally, requiring frequent replacement of the air distribution slider for maintenance

Images