A hydraulic quick coupling

Abstract

This utility model relates to a quick-connect and disconnection device, particularly a hydraulic quick-connect coupling. A 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 at the top of the valve core a with a diameter increasing from top to bottom, a beveled portion behind the protrusion that contacts the protruding beveled surface of the inner wall of the plug, a valve core O-ring a recessed area on the beveled portion, a convex ring a in the middle of the plug with a backstop groove, and a plug connector body fitted onto the outer wall of the rear of the plug. The female connector includes a housing and an outer sleeve. 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; the contact points have a housing O-ring and a housing plastic core, improving the sealing effect; the rear of the outer walls of the valve cores a and b are stamped.

Description

Technical Field

[0001] This utility model relates to a quick-connection device, and more particularly to 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 leakage 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. In some scenarios, short connectors may not meet requirements and could affect the performance and safety of the quick coupling. Summary of the Invention

[0003] To address the technical problem that the aforementioned short connectors cannot meet the requirements, this utility model provides a hydraulic quick connector.

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

[0005] A hydraulic quick connector includes a male connector and a female connector. The male connector includes a plug, a valve seat a is provided in the middle of the inner wall of the plug, an annular opening a is provided at the front of the inner wall of the plug, 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, the valve core a has a protrusion at the top, the diameter of the protrusion increases from top to bottom, a beveled part is provided behind the protrusion, the beveled part contacts the beveled surface of the inner wall of the plug, a valve core O-ring a is recessed in the beveled part, a convex ring a is provided in the middle of the plug, the convex ring a has a backlash groove, and a plug connector body is sleeved on the outer wall of the rear part of the plug. The female connector includes a housing and an outer sleeve, the inner wall of the housing has a valve seat a valve core ... There is a valve seat b, and a valve core b is located in the middle of the inner wall of the housing. 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, which contacts the 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 outer wall of the housing, and a housing connector body is fitted on the rear outer wall of the housing. An outer sleeve spring is located between the outer sleeve and the housing connector body. The outer sleeve is connected to a steel ball, which is located 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, and the convex ring b contacts the outer side of the front of the plug.

[0006] The inner wall of the front part of the housing is provided with a housing O-ring and a housing plastic core, the inner wall of the front part of the housing is provided with a convex ring c, the outer wall of the front part of the housing connector is provided with a convex ring d, and the convex ring c and convex ring d are covered with an outer sleeve.

[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. The inner wall of the plug includes a front wall and a rear wall, with the valve seat retaining ring a between the front wall and the rear wall. Both the front wall and the rear wall are smooth walls, and the length of the rear wall is greater than the length of the front wall.

[0008] The diameter of the rear inner wall of the plug connector is smaller than the diameter of the front wall. The middle part of the inner wall of the housing connector has an intermediate wall, the length of which is greater than the length of the front and rear inner walls of the housing connector.

[0009] The outer wall of the front part of the outer jacket is provided with an arc-shaped groove, and a groove is provided on the rear side of the arc-shaped groove. The number of grooves is at least two. The rear part of the inner wall of the outer jacket is provided with a recessed wall, and the outer wall of the outer jacket is knurled.

[0010] 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 cores to improve the sealing effect. The rear part of the outer wall of valve cores a and b is stamped to firmly hold valve core O-rings a and b, preventing them from falling off and extending their service life. In addition, the plug has a plug connector body, the housing has a housing connector body, the inner wall of the plug has an extended rear wall body, and the housing connector body has an extended middle wall body, making the overall length long enough. It is a long connector, which can be used in scenarios where short connectors cannot be used, thus making up for the deficiencies. 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 structure of the female connector of this utility model;

[0013] Figure 3 This is a schematic diagram of the male connector of this utility model;

[0014] Figure 4 A schematic diagram of the structure of the outer jacket of this utility model;

[0015] Figure 5 , 6 This is a schematic diagram of the structure of valve core a and valve core b of this utility model;

[0016] Figure 7 , 8 This is a schematic diagram of the structure of valve seat a and valve seat b of this utility model. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0018] like Figure 1 , 2 A hydraulic quick connector shown in figures 3, 4, 5, 6, 7, and 8 includes a male connector and a female connector. The male connector includes a plug 2, a valve seat a5 located in the middle of the inner wall of the plug 2, an annular opening a located at the front of the inner wall of the plug 2, a valve core a4 located at the annular opening a, a valve core spring a12 located between the valve seat a5 and the valve core a4, 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 part, a convex ring a17 located in the middle of the plug 2 with a backstop groove, and a plug connector body 15 fitted onto the outer wall of the rear part of the plug 2. The female connector includes a housing 1 and an outer sleeve 3. A valve seat b is provided in the middle of the inner wall of body 1, and a valve core b is provided in the middle of the inner wall of housing 1. A valve core spring b is provided 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 provided behind the protrusion, and the beveled part contacts the protruding beveled surface of the inner wall of housing. A valve core O-ring b13 is recessed in the beveled part. An outer sleeve 3 is fitted on the front outer wall of housing 1, and a housing connector body 14 is fitted on the rear outer wall of housing 1. An outer sleeve spring 9 is provided between the outer sleeve 3 and the housing connector body 14. The outer sleeve 3 is connected to a steel ball 8, and the steel ball 8 is in the through hole of housing 1. An annular opening b is provided at the front of the valve core b. A convex ring b18 is provided on the inner wall of the outer side of the annular opening, and the convex ring b18 contacts the outer front side of the plug 2.

[0019] The inner wall of the shell 1 is provided with a shell O-ring 6 and a shell plastic ring 7 at the front part of the inner wall. The inner wall of the shell 1 is provided with a convex ring c. The outer wall of the shell connector 14 is provided with a convex ring d at the front part of the outer wall. The convex ring c and the convex ring d are covered with an outer sleeve 3.

[0020] The inner wall of the plug 2 is provided with a valve seat retaining ring a11, which contacts the valve seat a. The inner wall of the housing 1 is provided with a valve seat retaining ring b, which contacts the valve seat b. The inner wall of the plug 2 includes a front wall and a rear wall 19, with the valve seat retaining ring a11 provided between the front wall and the rear wall 19. Both the front wall and the rear wall 19 are smooth walls, and the length of the rear wall 19 is greater than the length of the front wall.

[0021] The diameter of the rear inner wall of the plug connector body 15 is smaller than the diameter of the front wall. The middle of the inner wall of the shell connector body 14 is provided with an intermediate wall 20, the length of which is greater than the length of the front and rear inner walls of the shell connector body 14.

[0022] The outer wall of the outer jacket 3 is provided with an arc-shaped groove 21, and a groove is provided on the rear side of the arc-shaped groove 21. The number of grooves is at least two. The rear part of the inner wall of the outer jacket 3 is provided with a recessed wall 22. The outer wall of the outer jacket 3 is knurled.

[0023] In use, the front of plug 2 is recessed inward, and the front of housing 1 is recessed outward. The front of plug 2 fits perfectly with the convex ring b18, and there is a housing O-ring 6 and a housing plastic ring 7 here. The convex ring a17 fits against the inner wall of the front 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. The convex ring is used to connect the outer sleeve 3, which is suitable for short types. However, for long types, there is a housing connector body 14. The longer outer sleeve 3 can cover the convex rings c and d, which is more secure and safe. The lengthening of the recessed wall 22 and the convex ring c provides more space for the outer sleeve spring 9. A larger outer sleeve spring 9 is needed to maintain the elasticity. The convex rings of valve core a4 and valve core b... The diameter of the part increases from front to back, which increases the flow area when it is pressed against the wall, and there is a bend for buffering and acceleration. The absence of a joint body reduces the number of parts and lowers the cost. The length of the rear wall 19 is greater than that of the front wall, which increases the length of the plug 2. The length of the middle wall 20 is greater than the length of the inner walls of the front and rear of the housing connector 14, which is suitable for use in installations that require long distances. The rear of the outer walls of valve cores a4 and b are stamped to firmly hold valve core O-rings a and b13, preventing them from falling off, improving the sealing effect, and extending their service life. The middle part of valve seat a and valve seat b is a circular body, which connects to the connecting body and the outer wall. There are flow channel holes between the connecting bodies.

[0024] 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 connector and a female connector, characterized in that: The male connector includes a plug (2), a valve seat a (5) 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 (4) is provided in the annular opening a, a valve core spring a (12) is provided between the valve seat a (5) and the valve core a (4), 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 (17) is provided in the middle of the plug (2), a backstop groove is provided on the convex ring a (17), a plug connector body (15) is fitted on the outer wall of the rear part of the plug (2), and the female connector includes... Includes a housing (1) and an outer sleeve (3). A valve seat b is provided in the middle of the inner wall of the housing (1). A valve core b is provided in the middle of the inner wall of the housing (1). A valve core spring b is provided between the valve seat b and the valve core b. The top of the valve core b has a protrusion. The diameter of the protrusion increases from top to bottom. A sloping part is provided behind the protrusion. The sloping part contacts the protruding 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 on the front outer wall of the housing (1). A housing connector body (14) is provided on the rear outer wall of the housing (1). An outer sleeve spring (9) is provided between the outer sleeve (3) and the housing connector body (14). The outer sleeve (3) is connected to a steel ball (8). The steel ball (8) is in the through hole of the housing (1). An annular opening b is provided at the front of the valve core b. A convex ring b (18) is provided on the inner wall of the outer side of the annular opening. The convex ring b (18) contacts the outer side of the front of the plug (2).

2. A 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), the inner wall of the front part of the shell (1) is provided with a convex ring c, the outer wall of the shell connector body (14) is provided with a convex ring d, and the outer sleeve of the convex ring c and the convex ring d is provided with an outer sleeve (3).

3. A 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 (11), which contacts the valve seat a. The inner wall of the housing (1) is provided with a valve seat retaining ring b, which contacts the valve seat b. The inner wall of the plug (2) includes a front wall and a rear wall (19), with a valve seat retaining ring a (11) between the front wall and the rear wall (19). Both the front wall and the rear wall (19) are smooth walls, and the length of the rear wall (19) is greater than the length of the front wall.

4. A hydraulic quick coupling according to claim 1, characterized in that: The diameter of the rear inner wall of the plug connector body (15) is smaller than the diameter of the front wall body. The middle of the inner wall of the shell connector body (14) is provided with an intermediate wall body (20), and the length of the intermediate wall body (20) is greater than the length of the front inner wall and the rear inner wall of the shell connector body (14).

5. A hydraulic quick coupling according to claim 1, characterized in that: The outer wall of the outer jacket (3) is provided with an arc-shaped groove (21) on the front side, and a groove is provided on the rear side of the arc-shaped groove (21). The number of grooves is at least two. The inner wall of the outer jacket (3) is provided with a recessed wall (22) on the rear side. The outer wall of the outer jacket (3) is knurled.

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