A pneumatic quick coupling

Abstract

This utility model relates to a quick-connect and disconnection device, particularly a pneumatic quick-connect coupling. A pneumatic quick-connect coupling includes a male connector and a female connector. The male connector includes a plug, with a smooth wall a and a retaining ring arranged sequentially from front to back on the front outer wall of the plug. A sealing ring is provided behind the retaining ring. The female connector includes a housing, with a housing connector body fitted onto the rear outer wall of the housing. A valve sleeve is provided at the connection between the housing and the housing connector body. A bushing is provided on the front inner wall of the housing, with a valve core behind the bushing. A valve core spring is provided between the valve core and the valve sleeve. An outer sleeve is fitted onto the front outer wall of the housing, connected to a steel ball. The steel ball is located in a through hole in the housing. An outer sleeve spring is provided between the outer sleeve and the housing connector body. The advantages of this utility model are: novel structure, ingenious and simple design, plug without valve core and valve seat, ensuring large flow rate, single-handed operation, single-open / close valve, and the long plug can be tightly inserted into the female connector. It can be used as a pneumatic tool, testing and control equipment, and for compressed air.

Description

Technical Field

[0001] This utility model relates to a quick-connection device, and more particularly to a pneumatic quick connector. Background Technology

[0002] Quick couplings, including hydraulic quick couplings and various fluid quick couplings, are connection devices that quickly connect or disconnect pipelines, enabling rapid assembly and disassembly. Because quick couplings have a bidirectional backflow prevention function, preventing leaks when disconnecting pipelines, they are widely used in petroleum, metallurgy, hydropower, engineering machinery, shipbuilding, and electromechanical equipment industries. The connection structure of a quick coupling is its most important part; its connection method and structure directly determine the ease of use, reliability, and product quality. Quick couplings consist of two parts: a female connector and a male connector. Common designs are complex and have short plugs, which may affect the performance and safety of the quick coupling. Summary of the Invention

[0003] To address the aforementioned technical problems of complex design and short plug, this utility model provides a pneumatic quick connector.

[0004] The technical solution of this utility model is as follows:

[0005] A pneumatic quick connector includes a male connector and a female connector. The male connector includes a plug, and the outer wall of the front part of the plug consists of a smooth wall a and a retaining ring from front to back. A sealing ring body is provided on the rear side of the retaining ring. The female connector includes a housing, and a housing connector body is fitted on the rear outer wall of the housing. A valve sleeve is provided at the connection between the housing and the housing connector body. A bushing is provided on the front inner wall of the housing. A valve core is located on the rear side of the bushing. A valve core spring is provided between the valve core and the valve sleeve. An outer sleeve is fitted on the front outer wall of the housing. The outer sleeve is connected to a steel ball, which is located in a through hole in the housing. An outer sleeve spring is provided between the outer sleeve and the housing connector body.

[0006] The inner wall of the valve sleeve is recessed and equipped with a valve sleeve O-ring, which contacts the housing and the housing connector.

[0007] The outer wall of the front part of the housing is provided with an outer retaining ring, which contacts the outer wall of the outer casing.

[0008] The inner wall of the bushing is a smooth wall b at the front and an inclined wall b at the rear. A shell O-ring is provided between the bushing and the valve core. The valve core is fishbone shaped. The rear cross-section of the valve core is conical. The valve core O-ring is recessed on the left outer wall of the cone. The front of the valve core is funnel-shaped.

[0009] The outer wall of the sealing ring is a smooth wall, and the front and rear are inclined walls a and b, with the smooth wall b in front of the inclined wall a.

[0010] The technical solution of this utility model has a novel structure, ingenious and simple design. The plug has no valve core or valve seat, ensuring a large flow rate and can be operated with one hand. It has a single open and close valve, and the long plug can be tightly inserted into the body. It can be used as a pneumatic tool, testing and control equipment, and compressed air. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the male connector of this utility model;

[0013] Figure 3 This is a schematic diagram of the structure of the bushing of this utility model. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0015] like Figure 1 , 2 A pneumatic quick connector shown in Figure 3 includes a male connector and a female connector. The male connector includes a plug 2. The outer front wall of the plug 2 consists of a smooth wall a15 and a retaining ring 16 from front to back. A sealing ring 17 is provided on the rear side of the retaining ring 16. The female connector includes a housing 1. A housing connector body 12 is fitted on the rear outer wall of the housing 1. A valve sleeve 10 is provided at the connection between the housing 1 and the housing connector body 12. A bushing 11 is provided on the front inner wall of the housing 1. A valve core 4 is located on the rear side of the bushing 11. A valve core spring 8 is provided between the valve core 4 and the valve sleeve 10. An outer sleeve 3 is fitted on the front outer wall of the housing 1. The outer sleeve 3 is connected to a steel ball 5. The steel ball 5 is in a through hole in the housing 1. An outer sleeve spring 6 is provided between the outer sleeve 3 and the housing connector body 12.

[0016] The inner wall of the valve sleeve 10 is recessed and provided with a valve sleeve O-ring 9, which contacts the housing 1 and the housing connector 12.

[0017] The outer wall of the front part of the housing 1 is provided with an outer retaining ring 14, which contacts the outer wall of the outer casing 3.

[0018] The inner wall of the bushing 11 is a smooth wall b at the front and an inclined wall b at the rear. A housing O-ring 13 is provided between the bushing 11 and the valve core 4. The valve core 4 is fishbone shaped. The rear cross-section of the valve core 4 is conical. A valve core O-ring 7 is recessed on the outer wall of the left side of the conical body. The front of the valve core 4 is funnel-shaped.

[0019] The outer wall of the sealing ring body 17 is a smooth wall, and the front and rear are inclined walls a19 and b20, respectively. A smooth wall b18 is provided in front of the inclined wall a19.

[0020] When in use, plug 2 is inserted straight in, and the smooth wall a15 moves inward to block the inner wall of bushing 11 and the O-ring 13 of the housing, improving the sealing performance. The sealing ring 17 contacts the inner wall of the opening of housing 1, sealing the front and rear sections. The inclined walls a19 and b20 transition, and the plug length increases, making it a long plug. It is fixed by the steel ball 5 holding the retaining ring 16. The outer retaining ring 14 blocks the outer sleeve 3 to prevent the outer sleeve 3 from moving forward, making it easy to operate with one hand. The valve core 4 has an inclined hole at the front, opening the channel and allowing for one-handed operation and single-handed valve opening and closing. The long plug can be inserted tightly into the main body.

[0021] It should be understood that the above description is only a preferred embodiment of the present utility model and is not sufficient to limit the technical solution of the present utility model. For those skilled in the art, within the spirit and principles of the present utility model, additions, subtractions, substitutions, transformations or improvements can be made based on the above description, and all such additions, subtractions, substitutions or improvements should fall within the protection scope of the appended claims of the present utility model.

Claims

1. A pneumatic quick connector, comprising a male connector and a female connector, characterized in that: The male connector includes a plug (2), the front outer wall of the plug (2) consists of a smooth wall a (15) and a retaining ring (16) from front to back, and a sealing ring body (17) is provided on the back side of the retaining ring (16). The female connector includes a housing (1), the rear outer wall of the housing (1) is fitted with a housing connector body (12), a valve sleeve (10) is provided at the connection between the housing (1) and the housing connector body (12), a bushing (11) is provided on the front inner wall of the housing (1), a valve core (4) is provided on the back side of the bushing (11), a valve core spring (8) is provided between the valve core (4) and the valve sleeve (10), an outer sleeve (3) is fitted on the front outer wall of the housing (1), the outer sleeve (3) is connected to a steel ball (5), the steel ball (5) is in the through hole of the housing (1), and an outer sleeve spring (6) is provided between the outer sleeve (3) and the housing connector body (12).

2. A pneumatic quick coupling according to claim 1, characterized in that: The inner wall of the valve sleeve (10) is recessed and provided with a valve sleeve O-ring (9), which contacts the housing (1) and the housing connector (12).

3. A pneumatic quick coupling according to claim 1, characterized in that: The outer wall of the front part of the housing (1) is provided with an outer retaining ring (14), which is in contact with the outer wall of the outer casing (3).

4. A pneumatic quick coupling according to claim 1, characterized in that: The inner wall of the bushing (11) is a smooth wall b at the front and an inclined wall b at the rear. A housing O-ring (13) is provided between the bushing (11) and the valve core (4). The valve core (4) is fishbone shaped. The rear cross section of the valve core (4) is a cone. The valve core O-ring (7) is recessed on the left outer wall of the cone. The front of the valve core (4) is funnel shaped.

5. A pneumatic quick coupling according to claim 1, characterized in that: The outer wall of the sealing ring body (17) is a smooth wall, and the front and rear are inclined walls a (19) and inclined walls b (20), with a smooth wall b (18) in front of the inclined wall a (19).

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