Pneumatic quick coupling

Abstract

This utility model relates to a quick-connect and disconnection device, particularly a pneumatic quick-connect coupling. The 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 beveled wall a on the front outer wall from front to back. A ball-holding groove is provided on the rear side of the beveled wall a. 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, no valve core or valve seat in the plug, ensuring large flow rate, and single-handed operation. It features a single-open / close valve and 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, especially 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 check valve function, preventing leakage when the pipeline is disconnected, 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. Existing structures typically include a valve seat and a valve core, which is relatively complex in design and may affect the performance and safety of the quick coupling. Summary of the Invention

[0003] To address the aforementioned technical issues related to complex design, this utility model provides a pneumatic quick coupling.

[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 an inclined wall a from front to back. A ball retaining groove is provided on the rear side of the inclined wall a. 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 end of the housing is provided with a 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 technical solution of this utility model has a novel structure, ingenious and simple design. The plug has no valve core or valve seat, which ensures a large flow rate and can be operated with one hand. It has a single open and close valve and can be used as a pneumatic tool, testing and control equipment for compressed air. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 This is a schematic diagram of the male connector of this utility model;

[0012] Figure 3 This is a schematic diagram of the structure of the female connector bushing of this utility model. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0014] like Figure 1 , 2 The 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 a14 and an inclined wall a15 from front to back. A ball-holding groove 16 is provided on the rear side of the inclined wall a15. 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 the through hole of the housing 1. An outer sleeve spring 6 is provided between the outer sleeve 3 and the housing connector body 12.

[0015] 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.

[0016] The outer wall of the front end of the housing 1 is provided with a retaining ring 17, which contacts the outer wall of the outer sleeve 3.

[0017] 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 11 is fishbone shaped. The rear cross-section of the valve core 4 is conical. A valve core O-ring 7 is recessed on the left outer wall of the conical body. The front of the valve core 4 is funnel-shaped.

[0018] When in use, plug 2 is inserted straight in, and smooth wall a14 moves inward to block the inner wall of valve core 4 and the O-ring 13 of the housing, improving the sealing performance. Sloping wall b and sloping wall a15 come into contact, and smooth wall b comes into contact with smooth wall c behind sloping wall a15. It is fixed by steel ball 5 locking post and ball groove 16. The retaining ring 17 blocks the outer sleeve 3 to prevent the outer sleeve 3 from moving forward, which is convenient for single-handed operation. The valve core 4 has a sloping hole at the front, and the channel is open, which can be operated with one hand and the valve can be opened and closed by one hand.

[0019] 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 coupling, comprising a male coupling and a female coupling, characterized in that: The male connector includes a plug (2), the front outer wall of the plug (2) consists of a smooth wall a (14) and an inclined wall a (15) from front to back, and a ball groove (16) is provided on the rear side of the inclined wall a (15). 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 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 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. The 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. The pneumatic quick coupling according to claim 1, characterized in that: The outer wall of the front end of the housing (1) is provided with a retaining ring (17), which is in contact with the outer wall of the outer sleeve (3).

4. The 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.

Images