CN209414693U - A kind of novel pneumatic check valve - Google Patents

Abstract

The utility model relates to a novel pneumatic one-way valve. The invention mainly solves the technical problems of large energy loss and high manufacturing cost of the existing pneumatic check valve. Its technical scheme includes an air intake pipe, a rubber pad spool and an air outlet pipe; internal threads are provided on the inner surface of the exhaust end of the air intake pipe, and external threads are provided on the outer surface of the air intake end of the air outlet pipe. The air outlet pipe is connected with the outer thread through the internal thread, and the rubber pad valve core is arranged at the end face of the bottom hole of the internal thread of the intake pipe, and the rubber pad valve core is pressed tightly through the air intake pipe and the air outlet pipe; the rubber pad valve core It consists of an outer fixed ring and an inner movable ring, the outer fixed ring and the inner movable ring are connected through a bridge structure, and a gap is left between the outer fixed ring and the inner movable ring. The utility model has the advantages of simple structure, convenient installation, small opening pressure, better sealing performance, and can be widely used in pneumatic systems.

Description

A New Pneumatic Check Valve

technical field

The utility model relates to a novel pneumatic one-way valve.

Background technique

A one-way valve is a component used to control the one-way flow of fluid medium. It can realize the flow of fluid medium from one direction of the component to another direction, and can prevent the fluid medium in the other direction from flowing back to the previous direction. Pneumatic check valve is a control valve that controls the one-way flow of gas medium, and it has been widely used in industrial production.

Most of the current one-way valves adopt the structural form of a spring to compress the valve core to realize the one-way flow of the fluid medium. But in the pneumatic system, usually the working pressure of the system is low. When the check valve with spring structure is used, the system needs to overcome the spring resistance to ensure the opening of the check valve, which will cause a lot of energy loss and affect the entire pressure. For a pneumatic system that is not high, it will have a great impact. What's more, when the system pressure is too low, the one-way valve cannot be opened. Moreover, the one-way valve with a spring structure has a complex structure, high manufacturing cost, and troublesome maintenance.

Utility model content

The purpose of the utility model is to solve the technical problems of large energy loss and high manufacturing cost of the existing pneumatic one-way valve, and provide a new type of pneumatic one-way valve.

In order to achieve the above object, the technical scheme that the utility model takes is:

A new type of pneumatic one-way valve, which: includes an air intake pipe, a rubber pad valve core and an air outlet pipe; an internal thread is provided on the inner surface of the exhaust end of the air intake pipe, and an outer thread is provided on the outer surface of the air intake end of the air outlet pipe. The air inlet pipe and the air outlet pipe are connected with the outer thread through the inner thread, and the rubber pad valve core is arranged at the end face of the bottom hole of the inner thread of the air inlet pipe, and the rubber pad valve core is pressed tightly through the air inlet pipe and the air outlet pipe. The rubber pad spool is composed of an outer fixed ring and an inner movable ring, the outer fixed ring and the inner movable ring are connected through a bridge structure, and a gap is left between the outer fixed ring and the inner movable ring.

Preferably, the inner thread of the air inlet pipe and the outer thread of the air outlet pipe are located at the connecting part of the air inlet pipe and the air outlet pipe, and the outer diameter of the connecting part of the air inlet pipe and the air outlet pipe is larger than other parts of the air inlet pipe and the air outlet pipe.

Preferably, the rubber pad valve core is a circular rubber pad with a thickness of 1 mm.

Preferably, the outer diameter of the outer fixing ring is the same as the inner thread diameter of the intake pipe.

Preferably, the diameter of the inner movable ring is greater than the diameter of the exhaust port of the air intake pipe, and smaller than the diameter of the air intake port of the adjacent air outlet pipe,

Compared with the traditional pneumatic one-way valve with spring structure, the utility model is equipped with a newly designed rubber pad valve core between the inlet pipe and the outlet pipe, so the utility model has the advantages of simple structure, convenient installation, small opening pressure, and tight sealing Better performance, can be widely used in pneumatic systems and other advantages.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a front view of the rubber pad spool.

Detailed ways

The utility model is described in detail below in conjunction with accompanying drawing.

As shown in Fig. 1 and Fig. 2, a novel pneumatic one-way valve described in this embodiment includes an air inlet pipe 1, a rubber pad spool 3 and an air outlet pipe 2; the rubber pad spool 3 has a thickness of 1mm round rubber mat. An internal thread is provided on the inner surface of the exhaust end of the air intake pipe 1, and an external thread is provided on the outer surface of the air intake end of the air outlet pipe 2, and the air intake pipe 1 and the air outlet pipe 2 are communicated with the external thread by the internal thread The rubber pad spool 3 is arranged at the end face of the bottom hole of the internal thread of the air intake pipe 1, and the rubber pad spool 3 is pressed tightly by the air intake pipe 1 and the air outlet pipe 2; Composed of the inner movable ring 32, the outer fixed ring 31 and the inner movable ring 32 are connected through a bridge structure, and a gap is left between the outer fixed ring 31 and the inner movable ring 32.

In this embodiment, the internal thread of the air inlet pipe 1 and the external thread of the air outlet pipe 2 are located at the connecting part of the air inlet pipe and the air outlet pipe, and the outer diameter of the connecting part of the air inlet pipe and the air outlet pipe is larger than other parts of the air inlet pipe and the air outlet pipe. part. The outer diameter of the outer fixed ring 31 is the same as the internal thread diameter of the intake pipe 1, which can effectively prevent the bias phenomenon of the rubber pad valve core 3 in the intake pipe 2; the diameter of the inner movable ring 32 is larger than that of the intake pipe 1. The diameter of the exhaust port is less than the diameter of the air inlet of the adjacent air outlet pipe 2, so that the inner movable ring 32 can be hindered from opening towards the air outlet of the air inlet pipe 1, but it can be opened to the air inlet of the air outlet pipe 2. Orientation open.

The specific usage of the utility model is as follows: In the pneumatic system, when the pressure at the end of the inlet pipe 1 is higher than the pressure at the end of the outlet pipe 2, the gas medium enters the gas check valve through the inlet end of the inlet pipe 1 and flows through the rubber pad When the spool is 3, due to the effect of pressure difference, the inner movable ring 32 will be forced towards the outlet end of the air outlet pipe 2, and at the same time, because the inner movable ring 32 is not obstructed on the side of the air outlet pipe 2, the inner movable ring 32 will be forced toward the outlet end of the air outlet pipe. Open in the direction of 2, so that the air inlet pipe 1 and the air outlet pipe 2 are connected, so the gas medium can smoothly enter the air outlet pipe 2 through the rubber pad valve core 3, and flow into the next working element through the air outlet pipe 2, realizing a one-way valve The gas in the inlet pipe 1 flows toward the outlet pipe 2.

In the pneumatic system, when the pressure at the end of the outlet pipe 2 is higher than the pressure at the end of the inlet pipe 1, due to the pressure difference, the inner movable ring 32 will be forced in the direction of the inlet pipe 1, but the inner movable ring 32 is hindered by the inlet pipe 1. , causing the inner movable ring 32 to be pressed against the end surface of the inner threaded bottom hole of the intake pipe 1 by the high-pressure fluid medium in the outlet pipe 2, so that the inner movable ring 32 cannot be opened, resulting in the inability of the inlet pipe 1 and the outlet pipe 2 to communicate, so that the gas The medium cannot flow into the intake pipe 1 through the rubber pad valve core 3, so that the one-way flow function of the gas medium from the intake pipe 1 to the air outlet pipe 2 can be realized.

Claims (5)

1. a kind of novel pneumatic check valve, it is characterized in that: including air inlet pipe (1), rubber pad spool (3) and escape pipe (2)；In place It is equipped with internal screw thread in the inner surface of the exhaust end of air inlet pipe (1), is equipped with outer spiral shell in the outer surface for being located at the inlet end of escape pipe (2) Line, the air inlet pipe (1) and escape pipe (2) are connected by internal screw thread with external screw thread, and the rubber pad spool (3) is located at air inlet The bottom outlet endface of (1) internal screw thread is managed, and is compressed rubber pad spool (3) by air inlet pipe (1) and escape pipe (2)；It is described Rubber pad spool (3) is made of outer retainer plate (31) and interior active ring (32), the outer retainer plate (31) and interior active ring (32) It is connected by way of bridge-type structure, there are gaps between the outer retainer plate (31) and interior active ring (32).

2. a kind of novel pneumatic check valve according to claim 1, it is characterized in that: the internal screw thread of the air inlet pipe (1) with The external screw thread of escape pipe (2) is located at the coupling part of air inlet pipe and escape pipe, and air inlet pipe and escape pipe coupling part is outer Diameter is greater than the other parts of air inlet pipe and escape pipe.

3. a kind of novel pneumatic check valve according to claim 1, it is characterized in that: the rubber pad spool (3) is thickness For the round rubber pad of 1mm.

4. a kind of novel pneumatic check valve according to claim 1, it is characterized in that: the overall diameter of the outer retainer plate (31) It is identical as the internal thread diameter of air inlet pipe (1).

5. a kind of novel pneumatic check valve according to claim 1, it is characterized in that: the diameter of the interior active ring (32) is big In the diameter of the exhaust outlet of air inlet pipe (1), and it is less than the diameter of the air inlet of adjacent escape pipe (2).