Hydraulic quick coupling

Abstract

This utility model relates to a quick-connect and disconnection device, particularly a hydraulic quick-connect coupling. The hydraulic quick-connect coupling includes a male connector and a female connector. The male connector includes a plug, a valve seat a in the middle of the inner wall of the plug, an annular opening a at the front of the inner wall of the plug, a valve core a in the annular opening a, a valve core spring a between the valve seat a and the valve core a, a protrusion a at the top of the valve core a with a diameter increasing from top to bottom, a beveled section behind the protrusion that contacts the beveled surface of the inner wall of the plug, a valve core O-ring a recessed in the beveled section, a convex ring a at the front of the plug with a retaining groove, and a female connector including a housing and an outer sleeve, a valve seat b in the middle of the inner wall of the housing, and a valve core b in the middle of the inner wall of the housing. The advantages of this utility model are: through the convex rings a and b, the plug and housing contact parts fit tightly, and there are two contact points, with a housing O-ring and a housing plastic sealant at the contact points, improving the sealing effect.

Description

Technical Field

[0001] This utility model relates to a quick-connection device, especially a hydraulic quick-connect coupling. 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. Existing structures often lack sufficient sealing and may affect the performance and safety of the quick coupling. Summary of the Invention

[0003] To address the aforementioned technical problem of insufficient sealing, this utility model provides a hydraulic quick coupling.

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

[0005] Hydraulic quick couplings include male and female couplings. The male coupling includes a plug, a valve seat a in the middle of the inner wall of the plug, an annular opening a at the front of the inner wall of the plug, a valve core a in the annular opening a, a valve core spring a between the valve seat a and the valve core a, a convex part at the top of the valve core a with a diameter that increases from top to bottom, a beveled part behind the convex part that contacts the beveled surface of the inner wall of the plug, a valve core O-ring a recessed in the beveled part, and a convex ring a at the front of the plug with a backstop groove. The female coupling includes a housing and an outer sleeve, a valve seat b in the middle of the inner wall of the housing, and a valve core spring a between the valve seat a and the outer sleeve. A valve core b is located in the middle of the inner wall of the body. A valve core spring b is located between the valve seat b and the valve core b. The top of the valve core b has a protrusion with a diameter that increases from top to bottom. A beveled part is located behind the protrusion. The beveled part contacts the protruding beveled surface of the inner wall of the housing. A valve core O-ring b is recessed in the beveled part. An outer sleeve is fitted on the front of the outer wall of the housing. A retaining ring gasket is located on the inner wall behind the outer sleeve. An outer sleeve spring is located between the outer sleeve and the retaining ring gasket. The outer sleeve is connected to a steel ball. The steel ball is in the through hole of the housing. An annular opening b is located at the front of the valve core b. A convex ring b is located on the inner wall of the outer side of the annular opening. The convex ring b contacts the outer side of the front of the plug.

[0006] The inner wall of the front part of the shell is provided with a shell O-ring and a shell plastic core.

[0007] The inner wall of the plug is provided with a valve seat retaining ring a, which contacts the valve seat a; the inner wall of the housing is provided with a valve seat retaining ring b, which contacts the valve seat b.

[0008] An outer retaining ring a is provided between the inner wall of the front part of the outer sleeve and the housing, and the outer retaining ring a is located on the outer wall of the front part of the housing. An outer retaining ring b is provided between the retaining ring pad and the housing, and the outer retaining ring b is located on the outer wall of the front part of the housing.

[0009] The technical solution of this utility model has a novel structure and a clever and simple design. Through the convex rings a and b, the plug and the housing contact parts fit tightly, and there are two of them. The contact points have housing O-rings and housing plastic king, which improves the sealing effect. The rear part of the outer wall of valve core a and valve core b is stamped to firmly hold valve core O-rings a and b, preventing them from falling off and extending their service life. Attached Figure Description

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

[0011] Figure 2 , 3 This is a schematic diagram of the structure of valve core a and valve core b of this utility model;

[0012] Figure 4 , 5 This is a schematic diagram of the structure of valve seat a and valve seat b 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 Hydraulic quick couplings shown in figures 3, 4, and 5 include male and female couplings. The male coupling includes a plug 2, with a valve seat a in the middle of the inner wall of the plug 2, an annular opening a at the front of the inner wall of the plug 2, a valve core a in the annular opening a, and a valve core spring a between the valve seat a and the valve core a. The valve core a has a protrusion at the top, the diameter of which increases from top to bottom, and a beveled part behind the protrusion. The beveled part contacts the protruding beveled surface of the inner wall of the plug. A valve core O-ring a is recessed in the beveled part. A convex ring a16 is provided at the front of the plug 2, and a retaining groove is provided on the convex ring a16. The female coupling includes a housing 1 and an outer sleeve 3. A valve seat b5 is provided in the middle of the inner wall of the housing 1. A valve core b4 is provided in the middle, and a valve core spring b12 is provided between the valve seat b5 and the valve core b4. The top of the valve core b4 has a protrusion with a diameter that increases from top to bottom. A beveled part is provided behind the protrusion, which contacts the beveled surface of the inner wall of the housing. A valve core O-ring b13 is recessed in the beveled part. An outer sleeve 3 is fitted on the front part of the outer wall of the housing 1. A retaining ring gasket 14 is provided on the inner wall of the rear of the outer sleeve 3. An outer sleeve spring 9 is provided between the outer sleeve 3 and the retaining ring gasket 14. The outer sleeve 3 is connected to a steel ball 8, which is in the through hole of the housing 1. An annular opening b is provided at the front of the valve core b4. A convex ring b15 is provided on the inner wall of the outer side of the annular opening, and the convex ring b15 contacts the outer front part of the plug 2.

[0015] The inner wall of the front part of the inner wall of the shell 1 is provided with a shell O-ring 6 and a shell plastic king 7.

[0016] The inner wall of the plug 2 is provided with a valve seat retaining ring a, which contacts the valve seat a. The inner wall of the housing 1 is provided with a valve seat retaining ring b11, which contacts the valve seat b5.

[0017] An outer retaining ring a10 is provided between the inner front wall of the outer sleeve 3 and the housing 1. The outer retaining ring a10 is located on the outer front wall of the housing 1. An outer retaining ring b17 is provided between the retaining ring pad 14 and the housing 1. The outer retaining ring b17 is located on the outer front wall of the housing 1.

[0018] In use, the front part of plug 2 is recessed inward, and the front part of housing 1 is recessed outward. The front part of plug 2 fits perfectly with the convex ring b15, and there are housing O-ring 6 and housing plastic ring 7 here. The convex ring a16 fits against the inner wall of the front part of housing 1, and the steel ball 8 is stuck in the anti-reverse groove. Normally, a convex ring needs to be set on the outer wall of housing 1 to connect the outer sleeve 3. Now, a retaining ring washer 14 is used instead, which is more flexible and convenient. And it is blocked by the outer sleeve retaining ring b17. The diameter of the convex part of valve core a and valve core b4 is from the front The rear part becomes larger, resulting in a larger flow channel area when the valve is in contact with the main body. It also has a bend for buffering and acceleration. The absence of a joint body reduces the number of parts and lowers costs. The rear diameter of the inner wall of the plug 2 and the housing 1 is larger than the front diameter. The rear outer walls of the valve cores a and b4 are stamped to firmly hold the valve core O-rings a and b13, preventing them from falling off, improving the sealing effect, and extending the service life. The valve seat a and the valve seat b have a circular body in the middle, which connects to the connecting body and the outer wall. There are flow channel holes between the connecting bodies.

[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 hydraulic quick coupling, comprising a male coupling and a female coupling, characterized in that: The male connector includes a plug (2), a valve seat a is provided in the middle of the inner wall of the plug (2), an annular opening a is provided in the front of the inner wall of the plug (2), a valve core a is provided in the annular opening a, a valve core spring a is provided between the valve seat a and the valve core a, a convex part is provided at the top of the valve core a, the diameter of the convex part increases from top to bottom, a beveled part is provided behind the convex part, the beveled part contacts the convex and beveled part of the inner wall of the plug, a valve core O-ring a is provided in the recess of the beveled part, a convex ring a (16) is provided in the front of the plug (2), a backstop groove is provided on the convex ring a (16), and a female connector includes a housing (1) and an outer sleeve (3), a valve seat is provided in the middle of the inner wall of the housing (1). b(5), valve core b(4) is provided in the middle of the inner wall of the housing (1), valve core spring b(12) is provided between valve seat b(5) and valve core b(4), valve core b(4) has a protrusion at the top, the diameter of the protrusion increases from top to bottom, and a sloping part is provided behind the protrusion. The sloping part contacts the convex sloping surface of the inner wall of the housing. A valve core O-ring b(13) is provided in the recess of the sloping part. An outer sleeve (3) is provided in the front of the outer wall of the housing (1). A retaining ring pad (14) is provided in the inner wall of the rear part of the outer sleeve (3). An outer sleeve spring (9) is provided between the outer sleeve (3) and the retaining ring pad (14). The outer sleeve (3) is connected to the steel ball (8). The steel ball (8) is in the through hole of the housing (1). An annular opening b is provided in the front of the valve core b(4). A convex ring b(15) is provided in the inner wall of the outer side of the annular opening. The convex ring b(15) contacts the outer side of the front of the plug (2).

2. The hydraulic quick coupling according to claim 1, characterized in that: The inner wall of the shell (1) is provided with a shell O-ring (6) and a shell plastic king (7).

3. The hydraulic quick coupling according to claim 1, characterized in that: The inner wall of the plug (2) is provided with a valve seat retaining ring a, which contacts the valve seat a. The inner wall of the housing (1) is provided with a valve seat retaining ring b (11), which contacts the valve seat b (5).

4. The hydraulic quick coupling according to claim 1, characterized in that: An outer retaining ring a (10) is provided between the inner wall of the front part of the outer sleeve (3) and the shell (1). The outer retaining ring a (10) is located on the outer wall of the front part of the shell (1). An outer retaining ring b (17) is provided between the retaining ring pad (14) and the shell (1). The outer retaining ring b (17) is located on the outer wall of the front part of the shell (1).

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