Pneumatic valve

Abstract

The utility model discloses a pneumatic valve which comprises an upper valve body and a lower valve body which are fixedly connected through a connecting bolt, and an inner cavity of the upper valve body is communicated with an inner cavity of the lower valve body. A horizontally-arranged rubber pad is installed in the upper valve body, and a gap is formed between the outer ring of the rubber pad and the side wall of an inner cavity of the upper valve body. A cylindrical piston with an inner cavity is installed in the lower valve body in an up-down sliding mode, the middle position of the outer side of the piston protrudes outwards to form an annular protruding part, the upper surface of the protruding part and the inner wall of the lower valve body form an upper cavity, and the lower surface of the protruding part and the inner wall of the lower valve body form a lower cavity. The piston is arranged in the valve body, the structure is simple and compact, safety and reliability are achieved, and the failure rate is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pneumatic valve belongs to pneumatic valve technical field. BACKGROUND

[0002] Pneumatic valves are used in many technical applications to control air flow, valves are control components in fluid conveying systems, with functions of cutting off, regulating, guiding, preventing reverse flow, stabilizing pressure, dividing or overflow pressure relief. Valves used in fluid control systems, from the simplest stop valve to the most complex self-control system used in various valves, the variety and specification are quite numerous, valves can be used to control the flow of air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media and other types of fluids.

[0003] Most of the existing valves are changed by manually rotating the valve body to operate the use state of the valve, such valve can only deal with simple use requirements, and is not convenient to realize remote control, and the conventional pneumatic valve is a pneumatic diaphragm valve, which is composed of a pneumatic actuator and a valve body, in actual use, the pneumatic actuator is arranged outside the valve body, which is large in size and complex in structure, and is not flexible in control.

[0004] Therefore, it is necessary to improve the prior art. CONTENT OF THE UTILITY MODEL

[0005] The utility model discloses to the deficiency in the background art, provide a kind of pneumatic valve, piston is built into the inside of valve body, simple and compact structure, safe and reliable, low failure rate.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme:

[0007] A kind of pneumatic valve, including the upper valve body and lower valve body fixedly connected by connecting bolt between each other, the inner cavity of upper valve body and lower valve body is communicated with each other;

[0008] The upper valve body is installed with the rubber pad of horizontal arrangement, and the outer ring of the rubber pad is arranged with the inner cavity side wall of the upper valve body with clearance;

[0009] The lower valve body is slidably installed with the piston of cylindrical shape with inner cavity in upper and lower, the middle position of the outer side of the piston is outwardly protruding to form annular protruding portion, the upper surface of the protruding portion forms upper cavity with the inner wall of the lower valve body, and the lower surface of the protruding portion forms lower cavity with the inner wall of the lower valve body.

[0010] Further, the inside of the upper valve body is provided with a mounting seat, the mounting seat is fixedly connected with the inner wall of the upper valve body by extension arm, and the rubber pad is arranged on the lower surface of the mounting seat.

[0011] Further, the outer circle of the mounting seat is arranged with a gap to the inner cavity side wall of the upper valve body, the lower surface of the rubber pad is provided with a steel pressing plate, and the steel pressing plate and the rubber pad are fixed to the lower surface of the mounting seat by the fixing bolt.

[0012] Further, the lower end of the upper valve body is provided with a first air inlet channel, the first air inlet channel is communicated with the upper cavity, the lower valve body is provided with a second air inlet channel, and the first air inlet channel is communicated with the lower cavity.

[0013] Further, the outer circle of the protruding part of the piston is provided with a first sealing ring.

[0014] Further, the inner side wall of the upper valve body and the inner side wall of the lower valve body are both provided with a second sealing ring and a third sealing ring.

[0015] Further, the lower end of the inner side wall of the lower valve body extends inward to form a retaining ring, and the retaining ring limits the position of the piston.

[0016] Further, the lower end of the protruding part is vertically provided with a guide rod, the guide rod is slidingly installed in the lower valve body, the lower end of the guide rod extends out of the lower valve body, and the guide rod and the lower valve body are sealed by a sealing ring.

[0017] After the above technical scheme is adopted, compared with the prior art, the utility model has the following advantages:

[0018] The outer circle of the rubber pad is arranged with a gap to the inner cavity side wall of the upper valve body, the rubber pad is horizontally installed in the upper valve body, the outer circle of the rubber pad is arranged with a gap to the inner cavity side wall of the upper valve body, the lower valve body is slidingly installed with a cylindrical piston provided with an inner cavity, and the piston is slidingly installed to realize the opening and closing of the valve.

[0019] The utility model will be described in detail below in combination with the drawings and examples. DRAWINGS

[0020] Figure 1 It is the structural schematic diagram of the utility model;

[0021] Figure 2 It is Figure 1 The sectional view along A-A.

[0022] In the drawings,

[0023] 1-upper valve body, 2-lower valve body, 201-retaining ring, 3-connecting bolt, 4-mounting seat, 5-rubber pad, 6-steel pressing plate, 7-fixing bolt, 8-piston, 801-protruding part, 9-first air inlet channel, 10-first sealing ring, 11-second sealing ring, 12-third sealing ring, 13-guide rod, 14-sealing ring, 15-second air inlet channel. DETAILED DESCRIPTION

[0024] In order to have a clearer understanding of the technical features, objects and effects of the utility model, the specific implementation mode of the utility model will be explained by referring to the drawings.

[0025] As shown in Figures 1-2 The utility model provides a pneumatic valve, including mutually through connecting bolt 3 fixed connection's upper valve body 1 and lower valve body 2, the inner chamber of upper valve body 1 and lower valve body 2 is communicated with each other,

[0026] The upper valve body 1 is installed with the horizontally arranged rubber pad 5, and the outer ring of the rubber pad 5 is arranged with a gap on the inner cavity side wall of the upper valve body 1.

[0027] The lower valve body 2 is slidably installed with a cylindrical piston 8 with an inner cavity in the upper and lower directions, the middle position of the outer side of the piston 8 is outwardly protruded to form an annular protruding portion 801, the upper surface of the protruding portion 801 forms an upper cavity with the inner wall of the lower valve body 2, and the lower surface of the protruding portion 801 forms a lower cavity with the inner wall of the lower valve body 2.

[0028] Alternately, compressed air is introduced into the upper cavity and the lower cavity, the piston 8 is pushed to slide up and down, when the piston 8 is located at the upper end, the upper opening of the piston 8 is in contact with the lower surface of the rubber pad 5, so that the upper valve body 1 and the lower valve body 2 cannot be ventilated, and the utility model is in the cut-off state, when the piston 8 is located at the lower end, the upper opening of the piston 8 is separated from the lower surface of the rubber pad 5, so that the upper valve body 1 and the lower valve body 2 are mutually penetrated. The piston 8 is slidably arranged in the valve body, which does not occupy space, has simple structure, is safe and reliable, and has low failure rate.

[0029] The inside of the upper valve body 1 is provided with a mounting seat 4, the mounting seat 4 is fixedly connected with the inner wall of the upper valve body 1 through an extension arm, and the rubber pad 5 is arranged on the lower surface of the mounting seat 4.

[0030] The outer ring of the mounting seat 4 is arranged with a gap on the inner cavity side wall of the upper valve body 1, the lower surface of the rubber pad 5 is provided with a steel pressing plate 6, and the steel pressing plate 6 and the rubber pad 5 are fixed on the lower surface of the mounting seat 4 by the fixing bolt 7.

[0031] The lower end of the upper valve body 1 is provided with a first air inlet channel 9, the first air inlet channel 9 is communicated with the upper cavity, the lower valve body 2 is provided with a second air inlet channel 15, and the first air inlet channel 9 is communicated with the lower cavity.

[0032] The outer ring of the protruding portion 801 of the piston 8 is provided with a first sealing ring 10, and the first sealing ring 10 seals between the upper cavity and the lower cavity.

[0033] The inner side wall of the upper valve body 1 and the inner side wall of the lower valve body 2 are provided with a second sealing ring 11 and a third sealing ring 12, the second sealing ring 11 and the third sealing ring 12 of the inner side wall of the upper valve body 1 seal the upper cavity, and the second sealing ring 11 and the third sealing ring 12 of the inner side wall of the lower valve body 2 seal the lower cavity.

[0034] The lower end of the inner side wall of the lower valve body 2 extends inward to form a blocking ring 201, and the blocking ring 201 limits the position of the piston 8.

[0035] The lower end of the convex part 801 is vertically provided with a guide rod 13, the guide rod 13 is slidingly arranged in the lower valve body 2, the lower end of the guide rod 13 extends out of the lower valve body 2, the guide rod 13 is sealed with the lower valve body 2 through a sealing ring 14, and the length of the guide rod 13 extending out of the lower valve body 2 can indicate the position of the piston 8.

[0036] The specific working principle of the utility model is as follows:

[0037] The upper valve body 1 and the lower valve body 2 are fixedly connected through connecting bolts 3, the upper valve body 1 is internally provided with a horizontally arranged rubber pad 5, the outer ring of the rubber pad 5 is arranged in a gap with the inner cavity side wall of the upper valve body 1, the lower valve body 2 is internally slidingly arranged with a cylindrical piston 8 provided with an inner cavity, the outer side of the piston 8 is provided with a convex part 801, the upper surface of the convex part 801 forms an upper cavity with the inner wall of the lower valve body 2, the lower surface of the convex part 801 forms a lower cavity with the inner wall of the lower valve body 2, compressed air is alternately introduced into the upper cavity and the lower cavity, the piston 8 is slidingly pushed, when the piston 8 is located at the upper end, the upper opening of the piston 8 abuts against the lower surface of the rubber pad 5, so that the upper valve body 1 and the lower valve body 2 cannot be ventilated, and the utility model is in a cut-off state, when the piston 8 is located at the lower end, the upper opening of the piston 8 is separated from the lower surface of the rubber pad 5, so that the upper valve body 1 and the lower valve body 2 are mutually penetrated. The piston 8 is slidingly arranged in the valve body, does not occupy space, has simple structure, is safe and reliable, and has low failure rate.

[0038] The above is an example of the best implementation mode of the utility model, wherein the parts not described in detail are all the common knowledge of the ordinary skilled in the art. The protection scope of the utility model is subject to the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. A pneumatic valve, characterized by: The upper valve body (1) and the lower valve body (2) are fixedly connected by connecting bolts (3), and the inner cavities of the upper valve body (1) and the lower valve body (2) are communicated with each other; A horizontally arranged rubber pad (5) is arranged in the upper valve body (1), and the outer ring of the rubber pad (5) is arranged in a gap with the inner cavity side wall of the upper valve body (1); A cylindrical piston (8) provided with an inner cavity is slidably arranged in the lower valve body (2), the outer side of the piston (8) is protruded in the middle position to form an annular protruding part (801), the upper surface of the protruding part (801) forms an upper cavity with the inner wall of the lower valve body (2), and the lower surface of the protruding part (801) forms a lower cavity with the inner wall of the lower valve body (2).

2. A pneumatic valve as claimed in claim 1, characterized in that: An installation seat (4) is arranged in the upper valve body (1), the installation seat (4) is fixedly connected with the inner wall of the upper valve body (1) through an extension arm, and the rubber pad (5) is arranged on the lower surface of the installation seat (4).

3. A pneumatic valve as claimed in claim 2, characterised in that: The outer ring of the installation seat (4) is arranged in a gap with the inner cavity side wall of the upper valve body (1), the lower surface of the rubber pad (5) is provided with a steel pressing plate (6), and a fixing bolt (7) is arranged to fix the steel pressing plate (6) and the rubber pad (5) to the lower surface of the installation seat (4).

4. A pneumatic valve as defined in claim 1, wherein: A first air inlet channel (9) is arranged at the lower end of the upper valve body (1), the first air inlet channel (9) is communicated with the upper cavity, a second air inlet channel (15) is arranged on the lower valve body (2), and the first air inlet channel (9) is communicated with the lower cavity.

5. A pneumatic valve as defined in claim 1, wherein: A first sealing ring (10) is arranged at the outer ring of the protruding part (801) of the piston (8).

6. A pneumatic valve as defined in claim 1, wherein: Second and third sealing rings (11, 12) are arranged on the inner side walls of the upper valve body (1) and the lower valve body (2).

7. A pneumatic valve as defined in claim 1, wherein: The inner side wall of the lower valve body (2) is inwardly extended to form a retaining ring (201), and the retaining ring (201) limits the piston (8).

8. A pneumatic valve as defined in claim 1, wherein: A guide rod (13) is vertically arranged at the lower end of the protruding part (801), the guide rod (13) is slidably arranged in the lower valve body (2), the lower end of the guide rod (13) is arranged outside the lower valve body (2), and the guide rod (13) is sealed with the lower valve body (2) through a sealing ring (14).

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