CN204805690U - Pneumatic control valve - Google Patents

Abstract

The utility model relates to a pneumatic control valve, comprising a valve body, the valve body includes an upper valve cover and a valve seat, the upper valve cover is connected to the valve seat, the upper valve cover is provided with a pneumatic actuator, the pneumatic actuator includes a piston, a cylinder, Valve stem, diversion pipe and valve core, the piston is connected to the valve stem, the valve stem is connected in the cylinder, the valve stem is connected to the diversion pipe, the diversion pipe is provided with an outlet, the valve core is provided with a seal, and the upper valve cover The right side of the air inlet is also provided with an air inlet, and there are two air inlets, which are respectively the first and the second air inlet, and the valve seat is provided with a valve, and the valve seat is also provided with a connecting pipe. The control valve adopts air control method, adopts a two-position, two-port cut-off structure, and realizes control through a pneumatic actuator. It has a compact structure, stable performance, small size, light weight, convenient assembly, disassembly and maintenance, and a wide range of applications.

Description

A pneumatic control valve

technical field

The utility model relates to a control valve, in particular to a pneumatic control valve.

Background technique

Pneumatic control valves refer to pneumatic components that control the pressure, flow and flow direction of airflow in a pneumatic system and ensure the normal operation of pneumatic actuators or mechanisms. The structure of the pneumatic control valve can be decomposed into two parts: the valve body and the valve core. The valve body includes the valve seat and the valve hole. Air is the driving force, and the movement of the valve body is driven by pushing the film or the movement of the piston to control the opening of the valve to achieve the purpose of control. However, the existing pneumatic control valves are relatively large in size, heavy, and inconvenient for assembly, disassembly and maintenance. , and the gas control is poor, and the overall performance is unstable, so it needs to be improved.

Utility model content

In order to solve the problems of the prior art, the utility model provides a pneumatic control valve which adopts air control mode, has two air inlets, adopts a two-position two-port cut-off structure, and realizes control through a pneumatic actuator.

The specific technical scheme of the utility model is as follows: a pneumatic control valve includes a valve body, the valve body includes an upper valve cover and a valve seat, the upper valve cover is connected to the valve seat, and the upper valve cover is provided with a pneumatic The actuator, the pneumatic actuator includes a piston, a cylinder, a valve rod, a guide tube and a valve core, the piston is connected to the valve rod, the valve rod is connected in the cylinder, the valve rod is connected to the guide tube, the An outlet is provided on the guide tube, a seal is provided on the valve core, and an air inlet is provided on the right side of the upper valve cover, and there are two air inlets, which are respectively the first inlet The air port and the second air inlet, the first air inlet and the second air inlet are arranged vertically up and down, the valve seat is provided with a valve, the valve seat is also provided with a connecting pipe, and the connecting pipe includes an inlet Gas port, gas outlet port and diversion port, the inlet port is located at the left end of the valve seat, the gas outlet port is located at the right end of the valve seat, one end of the diversion port communicates with the flow port, its The other end communicates with the gas outlet.

Below is the subsidiary technical scheme of the utility model.

As a preferred solution, the material of the valve body is brass.

As a preferred solution, the material of the valve stem is stainless steel.

As a preferred solution, the air inlet port and the air outlet port are arranged in relative positions.

As a preferred solution, the valve core is made of tetrafluoroethylene.

As a preferred solution, the sealing member is made of fluorine rubber.

The technical effect of the utility model: a pneumatic control valve of the utility model adopts the air control mode, and it is provided with two air inlets, adopts a two-position two-port cut-off structure, and realizes control through a pneumatic actuator, which is especially suitable for It is suitable for explosion-proof and explosion-proof places, with compact structure, stable performance, small size, light weight, convenient assembly, disassembly and maintenance, and wide application range.

Description of drawings

Fig. 1 is a schematic structural view of a pneumatic control valve according to an embodiment of the present invention.

In the figure: valve body 1, upper valve cover 11, valve seat 12, pneumatic actuator 2, piston 21, cylinder 22, valve stem 23, guide tube 24, outlet 241, valve 25, valve core 3, seal 31 , The air inlet 4, the first air inlet 41, the second air inlet 42, the connecting pipe 5, the air inlet port 51, the air outlet port 52, and the diversion port 53.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in FIG. 1 , a pneumatic control valve of this embodiment includes a valve body 1 made of brass. With such arrangement, it can be formed by forging to completely eliminate the defects of valve body air holes. The valve body 1 includes an upper valve cover 11 and a valve seat 12, the upper valve cover 11 is connected to the valve seat 12, and the upper valve cover 11 is provided with a pneumatic actuator 2, which is convenient for pneumatic control. The pneumatic actuator 2 includes a piston 21, a cylinder 22, a valve stem 23, a guide tube 24 and a valve core 25. The piston 21 is connected to the valve stem 23, and the material of the valve stem 23 is stainless steel. In this way, the valve rod 22 is connected in the cylinder 22, the valve rod 23 is connected to the guide tube 24, the guide tube 24 is provided with an outlet 241, and the material of the valve core 3 is tetrafluoroethylene. Such arrangement has strong corrosion resistance and good sealing performance. The valve core 3 is provided with a sealing member 31, and the material of the sealing member 31 is fluorine rubber. Set in this way, oil resistance and high temperature resistance. The right side of described upper valve cover 11 is also provided with air inlet 4, and described air inlet is provided with two, and it is respectively the first air inlet 41 and the second air inlet 42, and it is vertically arranged up and down, Set up like this, form the structure of two two ports. The valve seat 12 is provided with a connecting pipe 5, and the connecting pipe 5 includes an air inlet port 51, an air outlet port 52 and a diversion port 53, and the air inlet port 51 is located at the left end of the valve seat 12, and the air outlet The port 52 is located at the right end of the valve seat 12, and the inlet port 51 and the gas outlet port 52 are arranged in opposite positions. Such arrangement facilitates reversing, realizes gas connection, disconnection and direction change. One end of the diversion port 53 communicates with the outlet 241 , and the other end communicates with the air outlet port 52 . This arrangement facilitates ventilation.

The working principle of a pneumatic control valve of the utility model is as follows: the start and close of the pneumatic control valve adopts the air control mode, and the switch of the valve is controlled by the cylinder provided in the upper valve cover, and the air pressure can be adjusted due to the output force of the cylinder. , can prevent the valve from leaking, and its reversing is quick and sensitive, realizes gas connection, disconnection and change of direction, and the air is fed through the second air inlet provided under the cylinder, so that the piston moves upward, and the valve stem moves upward, so that the valve core Both the valve and the valve are in the open state; while the first air inlet provided above the cylinder is inhaled, which makes the piston move downward, so that the spool and the valve are both in the closed state.

A pneumatic control valve of the utility model adopts an air control method, which is provided with two air inlets, adopts a two-position two-port cut-off structure, and realizes control through a pneumatic actuator, and is especially suitable for explosion-proof and explosion-proof places. Compact structure, stable performance, small size, light weight, convenient assembly and disassembly and maintenance, wide application range, suitable for water, oil, air, etc. It should be pointed out that the above-mentioned preferred embodiments are only to illustrate the technical conception and characteristics of the present utility model, and its purpose is to enable those familiar with this technology to understand the content of the present utility model and implement it accordingly, and not to limit this utility model. Protection scope of utility model. All equivalent changes or modifications made according to the spirit of the utility model shall fall within the protection scope of the utility model.

Claims (6)

1. a pneumatic control valve, comprise valve body, described valve body comprises bonnet and valve seat, described bonnet is connected on valve seat, it is characterized in that: described bonnet is provided with pneumatic actuator, described pneumatic actuator comprises piston, cylinder, valve rod, honeycomb duct and spool, described piston connects valve rod, described valve rod is connected in cylinder, described valve rod connects honeycomb duct, described honeycomb duct is provided with outflow opening, described spool is provided with Sealing, the right side of described bonnet is also provided with suction port, described suction port is provided with two, it is respectively the first suction port and the second suction port, lower vertical setting presented by described first suction port and the second suction port, described valve seat is provided with valve, described valve seat is also provided with adapter, described adapter comprises air inlet port, to give vent to anger port and flow-guiding mouth, described air inlet port is located at the left end of valve seat, described port of giving vent to anger is located at the right-hand member of valve seat, one end of described flow-guiding mouth is communicated with outflow opening, its the other end is communicated with port of giving vent to anger.

2. a kind of pneumatic control valve as claimed in claim 1, is characterized in that: the material of described valve body is brass.

3. a kind of pneumatic control valve as claimed in claim 1, is characterized in that: the material of described valve rod is stainless steel.

4. a kind of pneumatic control valve as claimed in claim 1, is characterized in that: described air inlet port and port of giving vent to anger are that relative position is arranged.

5. a kind of pneumatic control valve as claimed in claim 1, is characterized in that: the material of described spool is tetrafluoroethylene.

6. a kind of pneumatic control valve as claimed in claim 1, is characterized in that: the material of described Sealing is fluorine rubber.