soft start valve

Abstract

The invention discloses a soft start valve, which comprises a valve body with an inlet and an outlet. The valve body is provided with a relative valve port and a valve core. The upper surface of the valve core is connected with a valve stem. The sleeve slides up and down. There is also a chamber in the valve body. A valve cover is provided on the top of the valve body. The bottom surface of the valve cover is sealed with the valve body and the valve stem guide sleeve. There is a piston with a piston rod in the cylinder, the lower end of the piston rod is connected with the valve rod, the first throttling channel is communicated between the chamber and the inlet, and the chamber is communicated with the top of the piston cylinder with a The second throttling passage communicates with the third throttling passage between the top of the piston cylinder and the outlet. The soft start valve product of the present invention can utilize sealing components such as valve body rough parts, lower end caps and valve cores of conventional pressure reducing valves, and does not need to add new molds, which can greatly reduce the manufacturing cost.

Description

technical field [0001] The invention relates to a valve, in particular to a valve with a soft start function. Background technique [0002] A pressure reducing valve is a commonly used valve element used to reduce the pressure of a fluid. The structure of a direct-acting pressure reducing valve is as follows: figure 1 As shown, an inlet 3 and an outlet 6 are provided on the valve body 1 , a valve port 2 is provided between the inlet 3 and the outlet 6 , the valve core 5 is opposite to the valve port 2 , and the valve core spring 4 bears on the valve core 5 . A diaphragm 11 is provided between the valve body 1 and the valve cover 12 , and the diaphragm spring 13 is pressed against the top of the diaphragm 11 . A valve stem 7 is connected between the diaphragm 11 and the valve core 5, and the elastic force of the diaphragm spring 13 is adjusted to make the diaphragm 11 move downwards. At the same time, the valve stem 7 pushes the valve core 5 to move downwards. A throttling...

AI Technical Summary

Problems solved by technology

[0004] Existing soft start valves are generally independently designed and manufactured products, with a large number of parts, and cannot be used in common with the parts of the pressure reducing valve, requiring special mold manufacturing, which will increase the cost of parts manufacturing and inventory

Such as the Chinese invention patent application CN200710185721.4 discloses such a soft start valve device, which can well realize the soft start function, but the manufacturing cost is relatively high

Images