Hydraulic quick coupling

Abstract

This invention 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 plug connector body located on the rear inner wall of the plug, a plug protruding valve seat located on the inner wall of the middle portion of the plug connector body, a plug concave valve seat vertically engaged with the plug protruding valve seat, an annular notch located on the inner wall of the middle portion of the plug, a plug valve core located inside the annular notch, and a plug valve core spring located between the plug valve core and the plug protruding valve seat. The female connector includes a housing and an outer sleeve. A housing valve core is located on the middle portion of the inner wall of the housing, a housing valve sleeve is fitted onto the front portion of the housing valve core, the housing valve sleeve is engaged with the front inner wall of the housing, an outer sleeve is fitted onto the front outer wall of the housing, and a housing valve sleeve spring is located between the middle inner wall of the housing and the housing valve sleeve. The advantages of this invention are: they are individually hot-stamped, facilitating processing and assembly, resulting in better efficiency; the housing valve sleeve is a metal part, with a rubber-coated part engaged at the front end.

Description

Technical Field

[0001] This invention relates to a quick-connection device, particularly 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 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 valve seat structures, typically rod-shaped, are relatively difficult and complex to manufacture, and may affect the performance and safety of the quick coupling. Summary of the Invention

[0003] To address the aforementioned technical problem of difficult valve seat machining, this invention provides a hydraulic quick coupling.

[0004] The technical solution of the present invention is as follows: A hydraulic quick coupling includes a male coupling and a female coupling. The male coupling includes a plug, a plug body on the rear inner wall of the plug, a plug lug valve seat on the inner wall of the middle part of the plug body, a plug concave valve seat vertically engaged with the plug lug valve seat, an annular notch on the inner wall of the middle part of the plug, a plug valve core on the inner side of the annular notch, and a plug valve core spring between the plug valve core and the plug lug valve seat. The female coupling includes a housing and an outer sleeve. A housing valve core on the middle inner wall of the housing, a housing valve sleeve on the front part of the housing valve core, the housing valve sleeve being engaged with the inner wall of the front part of the housing, an outer sleeve on the outer wall of the front part of the housing, and a housing valve sleeve spring between the inner wall of the middle part of the housing and the housing valve sleeve.

[0005] An O-ring is provided between the plug and the plug connector body. The outer side of the annular bayonet is a right-angled wall, and the inner side of the annular bayonet is successively a slanted wall a, a smooth wall, and a slanted wall b. The plug connector body is located on the inner wall behind the slanted wall b. The inner wall of the front part of the plug connector body is a slanted wall c, and an O-ring is provided on the outer wall of the middle part of the plug.

[0006] The plug protruding valve seat has a slot a at the bottom, notches a at both ends, grooves a on both sides of the front part of the plug protruding valve seat, a slot b at the front part of the plug concave valve seat, notches b at both ends, grooves b on both sides of the front part of the plug concave valve seat, the plug protruding valve seat and the plug concave valve seat are T-shaped, slot a is engaged in slot b, and the plug protruding valve seat and the plug concave valve seat are installed in a cross shape.

[0007] The rear part of the plug valve core is provided with a protrusion, which is engaged on the outer wall of the plug protrusion valve seat. The outer wall of the plug valve core is in contact with the inclined wall a. The outer wall is a pointed protrusion. The O-ring of the plug valve core is recessed on the pointed protrusion. The front end of the plug valve core is recessed in the middle.

[0008] The outer wall of the front part of the housing is provided with a housing O-ring, the outer wall of the middle part is provided with an outer retaining ring, the inner wall of the middle part of the housing is provided with a convex ring body, the rear end of the convex ring body is provided with an inclined wall d, the convex ring body fixes the rear end of the housing valve core, the front end of the convex ring body is provided with a right-angled wall body, and the front side of the right-angled wall body is a smooth wall.

[0009] The valve core of the housing has a protrusion in the middle of the front end, and a flow channel hole is provided on the outer wall of the middle part of the valve core. The left end of the flow channel hole is a vertical hole, and the right end of the flow channel hole is an oblique hole with an angle of 18°. The outer wall of the oblique hole is an arc wall.

[0010] The front end of the housing valve sleeve is provided with a retaining ring, the front end of the retaining ring is provided with a groove, the groove is provided with a rubber-coated part, and the outer wall of the rear part of the housing valve sleeve is recessed with a housing valve sleeve O-ring and a housing valve sleeve plastic king.

[0011] The outer casing is circular in the middle, with rotating pieces on the outer wall. The rotating pieces are symmetrically arranged on the same diameter, with the outer part being larger than the inner part, forming a sloping shape.

[0012] Using the technical solution of this invention, the structure is novel, the design is ingenious and simple. The plug or outer wall of the housing is hexagonal, which requires tools to rotate, making it relatively inconvenient. The outer sleeve can be rotated by an integrally formed rotating plate, and it is larger on the outside and smaller on the inside, making it easy to grasp and operate. The plug protruding valve seat and the plug concave valve seat form a cross shape as a valve seat structure. They are individually punched, which is easy to process and easy to assemble, resulting in better efficiency. The housing valve sleeve is a metal part, and the front end is clamped with a rubber-coated part, which enhances the overall integrity, improves sealing and strength, and makes it less likely to detach. The housing valve core has a large area of ​​vertical holes and oblique holes, which allows for a large flow rate, and the arc-shaped wall facilitates fluid movement and reduces impact and wear on the wall. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the female connector of the present invention; Figure 3 This is a schematic diagram of the male connector of the present invention; Figure 4 , 5 This is a schematic diagram of the structure of the outer casing of the present invention; Figure 6 , 7 This is a schematic diagram of the structure of the valve core of the housing of the present invention; Figure 8 This is a schematic diagram of the structure of the plug protrusion valve seat of the present invention; Figure 9 This is a schematic diagram of the structure of the plug recess valve seat of the present invention; Figure 10 , 11 This is a schematic diagram of the structure of the housing valve sleeve of the present invention. 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 Hydraulic quick connectors shown in 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and 11 include male and female connectors. The male connector includes a plug 2, a plug connector body 15 is provided on the rear part of the inner wall of the plug 2, a plug protruding valve seat 13 is provided on the inner wall of the middle part of the plug connector body 15, the plug protruding valve seat 13 is vertically engaged with the plug concave valve seat 14, an annular retaining groove 19 is provided on the inner wall of the middle part of the plug 2, a plug valve core 5 is provided on the inner side of the annular retaining groove 19, and a plug valve core spring 12 is provided between the plug valve core 5 and the plug protruding valve seat 13. The female connector includes a housing 1 and an outer sleeve 3, a housing valve core 4 is provided on the middle part of the inner wall of the housing 1, a housing valve sleeve 10 is fitted on the front part of the housing valve core 4, the housing valve sleeve 10 is engaged on the inner wall of the front part of the housing 1, an outer sleeve 3 is fitted on the outer wall of the front part of the housing 1, and a housing valve sleeve spring 7 is provided between the inner wall of the middle part of the housing 1 and the housing valve sleeve 10.

[0016] A plug connector O-ring 16 is provided between the plug 2 and the plug connector body 15. The outer side of the annular retainer 19 is a right-angled wall, and the inner side of the annular retainer 19 is successively a sloping wall a, a smooth wall and a sloping wall b. The plug connector body 15 is located on the inner wall behind the sloping wall b. The inner wall of the front part of the plug connector body 15 is a sloping wall c. A plug O-ring 18 is provided on the outer wall of the middle part of the plug 2.

[0017] The plug protruding valve seat 13 has a slot a20 at its bottom, notches a at both ends, and grooves a on both sides of its front. The plug concave valve seat 14 has a slot b21 at its front, notches b at both ends, and grooves b on both sides of its front. The plug protruding valve seat 13 and the plug concave valve seat 14 are T-shaped, with slot a20 engaged in slot b21. The plug protruding valve seat 13 and the plug concave valve seat 14 are installed in a cross shape.

[0018] The plug valve core 5 has a protrusion at the rear, which is engaged on the outer wall of the plug protrusion valve seat 13. The outer wall of the plug valve core 5 is in contact with the inclined wall a. The outer wall is a pointed protrusion. The pointed protrusion is recessed with the plug valve core O-ring 17. The front end of the plug valve core 5 is recessed in the middle.

[0019] The outer wall of the front part of the housing 1 is provided with a housing O-ring 11, the outer wall of the middle part is provided with an outer retaining ring 6, the inner wall of the middle part of the housing 1 is provided with a convex ring body 22, the rear end of the convex ring body 20 is provided with an inclined wall d, the convex ring body 22 fixes the rear end of the housing valve core 4, the front end of the convex ring body 22 is provided with a right-angled wall, and the front side of the right-angled wall is a smooth wall.

[0020] The front end of the valve core 4 has a protrusion in the middle, and the outer wall of the middle part of the valve core 4 has a flow channel hole. The left end of the flow channel hole is a vertical hole, and the right part of the flow channel hole is an oblique hole with an angle of 18°. The outer wall of the oblique hole is an arc wall.

[0021] The front end of the housing valve sleeve 10 is provided with a retaining ring 23, the front end of the retaining ring 23 is provided with a groove, the groove is provided with a rubber-coated part 24, and the outer wall of the rear part of the housing valve sleeve 10 is recessed with a housing valve sleeve O-ring 8 and a housing valve sleeve plastic king 9.

[0022] The outer jacket 3 is circular in the middle, with rotating pieces on the outer wall. The rotating pieces are symmetrically arranged on the same diameter, with the outer part being larger than the inner part, forming a sloping shape.

[0023] In use, the inner wall of the outer sleeve 3 and the front outer wall of the plug 2 are threaded. The plug 2 is initially inserted between the housing 1 and the outer sleeve 3. The rotating disc can be rotated for easy operation without the need for other tools. The protrusion of the housing valve core 4 contacts the recess in the middle of the plug valve core 5. The front end of the annular retaining ring 19 pushes the retaining ring 23 inward, gradually opening the flow channel on the outer wall of the plug valve core 5. The arc-shaped wall on the plug valve core 5 facilitates the increase of fluid velocity and reduces impact and wear. The flow channel hole is enlarged, the angle of the inclined hole is 18°, the overall width is large, and the flow diameter is large. The housing valve core 10 is cylindrical. It fits tightly against the inner wall of the housing 1, providing a good seal. The housing valve sleeve O-ring 8 and housing valve sleeve plastic king 9 enhance the sealing effect. The retaining ring 23 contacts the housing 1. The inclined wall a leads to the smooth wall, expanding the diameter. Then, through the inclined walls b and c, a curved flow channel is formed, resulting in good speed. The protrusion of the plug valve core 5 provides support for the plug protruding valve seat 13. The plug protruding valve seat 13 and the plug concave valve seat 14 are interlocked to form a valve seat structure in a cross shape. The notches a and b are engaged with the steps of the plug connector body 15, resulting in a robust structure. This replaces the commonly used bar-material-machined valve seat, which is difficult to machine and has high costs.

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 plug connector body (15) is provided on the rear part of the inner wall of the plug (2), a plug protruding valve seat (13) is provided on the inner wall of the middle part of the plug connector body (15), the plug protruding valve seat (13) is vertically locked with the plug concave valve seat (14), the inner wall of the middle part of the plug (2) is provided with an annular bayonet (19), the inner side of the annular bayonet (19) is provided with a plug valve core (5), and a plug valve core spring (12) is provided between the plug valve core (5) and the plug protruding valve seat (13). The female connector includes a housing (1) and an outer sleeve (3), a housing valve core (4) is provided on the middle part of the inner wall of the housing (1), a housing valve sleeve (10) is sleeved on the front part of the housing valve core (4), the housing valve sleeve (10) is locked on the inner wall of the front part of the housing (1), the outer sleeve (3) is sleeved on the outer wall of the front part of the housing (1), and a housing valve sleeve spring (7) is provided between the inner wall of the middle part of the housing (1) and the housing valve sleeve (10).

2. The hydraulic quick coupling according to claim 1, characterized in that: A plug connector O-ring (16) is provided between the plug (2) and the plug connector body (15). The outer side of the annular bayonet (19) is a right-angled wall, and the inner side of the annular bayonet (19) is successively a slanted wall a, a smooth wall and a slanted wall b. The plug connector body (15) is located on the inner wall behind the slanted wall b. The inner wall of the front part of the plug connector body (15) is a slanted wall c. A plug O-ring (18) is provided on the outer wall of the middle part of the plug (2).

3. The hydraulic quick coupling according to claim 1, characterized in that: The plug protruding valve seat (13) has a slot a (20) at the bottom, notches a at both ends, grooves a on both sides of the front part of the plug protruding valve seat (13), a slot b (21) at the front part of the plug concave valve seat (14), notches b at both ends, grooves b on both sides of the front part of the plug concave valve seat (14), the plug protruding valve seat (13) and the plug concave valve seat (14) are T-shaped, the slot a (20) is engaged in the slot b (21), and the plug protruding valve seat (13) and the plug concave valve seat (14) are installed in a cross shape.

4. The hydraulic quick coupling according to claim 1, characterized in that: The plug valve core (5) has a protrusion at the rear. The protrusion is engaged on the outer wall of the plug protrusion valve seat (13). The outer wall of the plug valve core (5) is in contact with the inclined wall a. The outer wall is a pointed protrusion. The pointed protrusion is recessed with a plug valve core O-ring (17). The front end of the plug valve core (5) is recessed in the middle.

5. The hydraulic quick coupling according to claim 1, characterized in that: The outer wall of the front part of the housing (1) is provided with a housing O-ring (11), the outer wall of the middle part is provided with an outer retaining ring (6), the inner wall of the middle part of the housing (1) is provided with a convex ring body (22), the rear end of the convex ring body (22) is provided with an inclined wall d, the convex ring body (22) fixes the rear end of the housing valve core (4), the front end of the convex ring body (22) is provided with a right-angle wall body, and the front side of the right-angle wall body is a smooth wall.

6. The hydraulic quick coupling according to claim 1, characterized in that: The front end of the valve core (4) is provided with a protrusion in the middle. The outer wall of the middle part of the valve core (4) is provided with a flow channel hole. The left end of the flow channel hole is a vertical hole, and the right part of the flow channel hole is an oblique hole with an angle of 18°. The outer wall of the oblique hole is an arc-shaped wall.

7. The hydraulic quick coupling according to claim 1, characterized in that: The front end of the housing valve sleeve (10) is provided with a retaining ring (23), the front end of the retaining ring (23) is provided with a slot, the slot is provided with a rubber-coated part (24), and the outer wall of the rear part of the housing valve sleeve (10) is recessed with a housing valve sleeve O-ring (8) and a housing valve sleeve plastic king (9).

8. The hydraulic quick coupling according to claim 1, characterized in that: The outer jacket (3) is a ring in the middle, with rotating pieces on the outer wall. The rotating pieces are symmetrically arranged on the same diameter, with the outer part being larger than the inner part, forming a slope.

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