Blind plug type fluid connector
Blind-mating fluid connectors solve the installation problem of male and female connectors not being able to be directly locked through structural design such as moving sleeve, retaining ring and vent hole, and achieve reliable sealing and automatic guidance without locking structure, thereby improving installation efficiency and fluid flow rate.
Patent Information
- Application Number
- CN202510891289.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-30
- Publication Date
- 2025-11-14
AI Technical Summary
Male and female connectors cannot be directly locked in certain scenarios, leading to installation difficulties.
A blind-mating fluid connector was designed. By setting structures such as moving sleeve, retaining ring, O-ring and vent hole on the plug and housing, a sealing connection without locking structure is achieved, allowing a certain degree of radial floating, and automatic guidance and venting functions are realized through the inclined wall.
It achieves a leak-free, sealed connection, ensures reliable installation, and can automatically align even with deviations, improving installation efficiency and fluid flow rate.
Smart Images
Figure CN120946873A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a quick-connect and disconnection connection device, particularly a blind-mating fluid 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. Commonly, they are inserted and locked by a steel ball and a backflow preventer. However, in some special scenarios, directly locking the male and female connectors together cannot guarantee proper installation, which presents a challenge. Summary of the Invention
[0003] To address the technical problem of installation difficulties caused by the inability to directly lock the male and female connectors, this invention provides a blind-mating fluid connector.
[0004] The technical solution of the present invention is as follows: A blind-mating fluid connector includes a male connector and a female connector. The male connector is mounted on a plug mounting base, and the female connector is mounted on a housing mounting base. The plug mounting base and the housing mounting base move relative to each other to allow the male connector and the female connector to engage and open a flow channel. The male connector includes a plug, a plug valve seat on the outer rear wall of the plug, a plug valve core on the inner front wall of the plug, a plug valve core spring between the plug valve seat and the plug valve core, and a plug moving sleeve on the outer middle wall of the plug. The female connector includes a housing and a housing moving sleeve. A housing moving sleeve is fitted on the outer middle wall of the housing, a housing valve core on the inner rear wall of the housing, a bushing between the front part of the housing valve core and the housing, and a housing valve core spring between the bushing and the rear part of the housing valve core.
[0005] The inner wall of the rear end of the housing is provided with a housing retaining ring, and an arc groove is opened on the outer side of the housing retaining ring. The outer wall of the rear part of the housing is provided with a slot a, and a housing O-ring a is provided on the slot a. The inner side of the front end of the housing is provided with an inclined wall, and a groove d is provided on the inner side of the inclined wall. A housing O-ring b is provided in the groove d.
[0006] The inner wall of the moving sleeve of the housing is recessed and has a groove a. The moving sleeve O-ring is provided in the groove a. The groove a has an exhaust hole a that communicates with the outside.
[0007] The inner wall of the rear end of the plug is provided with a plug retaining ring, and an arc groove is opened on the outer side of the plug retaining ring. The outer wall of the rear part of the plug is provided with a slot b, and a plug O-ring is provided on the slot b. The inner wall of the middle part of the plug moving sleeve is recessed with a groove b, and the plug moving sleeve O-ring is provided in the groove b. The groove b is provided with a vent hole b communicating with the outside.
[0008] The front part of the valve core is an annular body b, with a groove c around the front of the annular body b. An O-ring of the valve core is placed in the groove c. The rear part of the annular body b is a frustum a, with a diameter larger at the front and smaller at the back. The frustum a is connected to a fluid orifice seat via a straight rod. The fluid orifice seat includes a circular body and a connecting rod. The connecting rod is located at the center of the circular body. Connecting ribs are provided between the connecting rod and the circular body. The connecting ribs are evenly distributed. The circular body has a fluid orifice. A guide wall a is formed on the outer side of the fluid orifice, and a guide wall b is formed on the inner side. A boss is formed at the rear of the fluid orifice seat, and the guide wall b is on the outer wall of the boss.
[0009] The front part of the plug valve core is an annular body a, which is a fluid distributor. The fluid distributor has baffles at both ends. The fluid distributor extends beyond the baffles to form a step. Both ends of the fluid distributor are arc surfaces. The cross-sectional width of the fluid distributor is larger at the front and smaller at the back.
[0010] The technical solution of this invention has a novel structure, ingenious and simple design, no locking structure, and relies on an external structure for locking. It can maintain a seal in both the plugged and unplugged states, with no leakage, and reliable installation. The shell material and coating have strong wear resistance and corrosion resistance, and have a radial floating function with a maximum radial floating amount of 0.25mm. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the male connector used in this invention; Figure 3 This is a schematic diagram of the structure of the female connector used in this invention; Figure 4 This is a schematic diagram of the structure of the movable sleeve of the plug of the present invention; Figure 5 , 6 7 is a schematic diagram of the plug valve core of the present invention; Figure 8 This is a schematic diagram of the structure of the housing of the present invention; Figure 9 , 10 This is a schematic diagram of the structure of the moving sleeve of the housing of the present invention; Figure 11 , 12 This is a schematic diagram of the structure of the valve core of the housing of the present invention. Detailed Implementation
[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example
[0013] like Figure 1 , 2 The blind-mating fluid connectors shown in 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12 include a male connector and a female connector. The male connector is mounted on a plug mounting base 19, and the female connector is mounted on a housing mounting base 20. The plug mounting base 19 and the housing mounting base 20 move relative to each other to allow the male connector and the female connector to cooperate and open the flow channel. The male connector includes a plug 2, a plug valve seat 8 is provided on the outer rear wall of the plug 2, a plug valve core 6 is provided on the inner front wall of the plug 2, a plug valve core spring 15 is provided between the plug valve seat 8 and the plug valve core 6, and a plug moving sleeve 3 is sleeved on the outer middle wall of the plug 2. The female connector includes a housing 1 and a housing moving sleeve 4, a housing moving sleeve 4 is sleeved on the outer middle wall of the housing 1, a housing valve core 5 is provided on the inner rear wall of the housing 1, a bushing 7 is provided between the front of the housing valve core 5 and the housing 1, and a housing valve core spring 14 is provided between the bushing 7 and the rear of the housing valve core 5.
[0014] The inner wall of the rear end of the housing 1 is provided with a housing retaining ring 12, and an arc groove a34 is opened on the outer side of the housing retaining ring 12. The outer wall of the rear part of the housing 1 is provided with a slot a, and a housing O-ring a16 is provided on the slot a. The inner side of the front end of the housing is provided with an inclined wall 35, and a groove d is provided on the inner side of the inclined wall 35. A housing O-ring b10 is provided in the groove d.
[0015] The inner wall of the moving sleeve 4 of the housing is recessed and has a groove a. The moving sleeve O-ring 18 is provided in the groove a. The groove a has an exhaust hole a that communicates with the outside.
[0016] The inner wall of the rear end of the plug 2 is provided with a plug retaining ring 13, and an arc groove b is opened on the outer side of the plug retaining ring 13. The outer wall of the rear part of the plug 2 is provided with a slot b, and a plug O-ring 17 is provided on the slot b. The inner wall of the middle part of the plug moving sleeve 3 is recessed with a groove b, and a plug moving sleeve O-ring 11 is provided in the groove b. The groove b is provided with a vent hole b36 that communicates with the outside.
[0017] The front part of the housing valve core 5 is an annular body b23, with a groove c around the front of the annular body b23. An O-ring of the housing valve core is placed in the groove c. The rear part of the annular body b23 is a frustum a27, with a diameter larger at the front and smaller at the rear. The frustum a27 is connected to the fluid orifice seat 24 through a straight rod. The fluid orifice seat 24 includes a circular body and a connecting rod 29. The connecting rod 29 is located at the center of the circular body. A connecting rib 28 is provided between the connecting rod 29 and the circular body. The connecting rib 28 is evenly distributed. The circular body has a fluid orifice. A guide wall a25 is opened on the outer side of the fluid orifice, and a guide wall b26 is opened on the inner side. A boss is formed at the rear of the fluid orifice seat 24, and the guide wall b26 is on the outer wall of the boss.
[0018] The front part of the plug valve core 6 is an annular body a30, which is a fluid distributor 31. The fluid distributor 31 has baffles 32 at both ends. The fluid distributor 31 extends beyond the baffles 32 to form a step 33. Both ends of the fluid distributor 31 are arc surfaces, and the cross-sectional width of the fluid distributor 31 is larger at the front and smaller at the back.
[0019] During use, the male and female connectors themselves cannot be locked. They are mounted on the plug mounting base 19 and the housing mounting base 20, which are sleeves that enclose the housing moving sleeve 4 and the plug outer sleeve 3. The baffle 32 facilitates the blocking and diversion of the fluid from the two arc surfaces of the diverter 31. The outer wall of the baffle 32 is arc-shaped to prevent erosion. The annular bodies b23 and b24 have smooth surface contact. The plug mounting base 19 and the housing mounting base 20 are part of the equipment and are locked by the external structure. Therefore, when they are moved and connected, there may be some deviation. Thus, the use of the plug moving sleeve 3 and the housing moving sleeve 4 allows for a certain radial float, with a maximum radial float of 0.25mm. Furthermore, if there is air inside that cannot be discharged during movement and connection, it will be very difficult to remove. Therefore, there are vent holes a and b36 to release pressure. The arc grooves a34 and b facilitate the installation and removal of the housing retaining ring 12 and the plug retaining ring 13, providing protection and preventing damage caused by prying. The inner side of the front end of the housing is provided with a sloping wall 35. When the plug 2 touches the housing 1, it may not be aligned and may hit the sloping wall 35. The sloping wall 35 is a large sloping wall with automatic guidance and centering function. The housing valve core 5 is integrally formed, serving as both a valve seat and a valve core. Fluid flows through the fluid hole, and the guide sloping wall a25, guide sloping wall b26, and frustum a27 facilitate the improvement of the flow channel curve and increase the flow rate. The fluid 31 behind the plug valve core 6 quickly flows to both sides through the arc surface. The step 33 facilitates the locking of the plug valve core spring 15. The overall structure realizes blind insertion fluid transmission.
[0020] It should be understood that the above description is only a preferred embodiment of the present invention and is not sufficient to limit the technical solution of the present invention. For those skilled in the art, within the spirit and principles of the present invention, 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 invention.
Claims
1. A blind-mating fluid connector, comprising a male connector and a female connector, characterized in that: The male connector is mounted on the plug mounting base (19), and the female connector is mounted on the housing mounting base (20). The plug mounting base (19) and the housing mounting base (20) move relative to each other so that the male connector and the female connector cooperate to open the flow channel. The male connector includes a plug (2), a plug valve seat (8) is provided on the outer wall of the rear part of the plug (2), a plug valve core (6) is provided on the inner wall of the front part of the plug (2), a plug valve core spring (15) is provided between the plug valve seat (8) and the plug valve core (6), and a plug moving sleeve (3) is provided on the outer wall of the middle part of the plug (2). The female connector includes a housing (1) and a housing moving sleeve (4). The housing moving sleeve (4) is provided on the outer wall of the middle part of the housing (1), a housing valve core (5) is provided on the inner wall of the rear end of the housing (1), a bushing (7) is provided between the front part of the housing valve core (5) and the housing (1), and a housing valve core spring (14) is provided between the bushing (7) and the rear part of the housing valve core (5).
2. The blind-mating fluid connector according to claim 1, characterized in that: The inner wall of the rear end of the housing (1) is provided with a housing retaining ring (12), and an arc groove is opened on the outer side of the housing retaining ring (12). The outer wall of the rear part of the housing (1) is provided with a slot a, and a housing O-ring a (16) is provided on the slot a. The inner side of the front end of the housing is provided with an inclined wall (35), and a groove d is provided on the inner side of the inclined wall (35). A housing O-ring b (10) is provided in the groove d.
3. The blind-mating fluid connector according to claim 1, characterized in that: The inner wall of the moving sleeve (4) of the housing is recessed and has a groove a. The moving sleeve O-ring (18) is provided in the groove a. The groove a has an exhaust hole a that communicates with the outside.
4. The blind-mating fluid connector according to claim 1, characterized in that: The inner wall of the rear end of the plug (2) is provided with a plug retaining ring (13), and the outer side of the plug retaining ring (13) is provided with an arc groove. The outer wall of the rear part of the plug (2) is provided with a slot b, and a plug O-ring (17) is provided on the slot b. The inner wall of the middle part of the plug moving sleeve (3) is recessed with a groove b, and a plug moving sleeve O-ring (11) is provided in the groove b. The groove b is provided with an exhaust hole b (36) that communicates with the outside.
5. The blind-mating fluid connector according to claim 1, characterized in that: The front part of the housing valve core (5) is an annular body b (23), and the front part of the annular body b (23) is provided with a groove c. The groove c is provided with an O-ring of the housing valve core. The rear part of the annular body b (23) is a frustum a (27). The diameter of the frustum a (27) is larger at the front and smaller at the back. The frustum a (27) is connected to the fluid hole seat (24) through a straight rod. The fluid hole seat (24) includes a circular body and a connecting rod (29). The connecting rod (29) is located at the center of the circular body. A connecting rib (28) is provided between the connecting rod (29) and the circular body. The connecting rib (28) is evenly distributed. The circular body has a fluid hole. A guide wall a (25) is opened on the outside of the fluid hole, and a guide wall b (26) is opened on the inside. A boss is formed at the rear part of the fluid hole seat (24). The guide wall b (26) is on the outer wall of the boss.
6. The blind-mating fluid connector according to claim 1, characterized in that: The front part of the plug valve core (6) is an annular body a (30), the annular body a (30) is a fluid divider (31), the upper and lower ends of the fluid divider (31) are provided with baffles (32), the fluid divider (31) extends beyond the baffles (32) to form a step (33), both ends of the fluid divider (31) are arc surfaces, and the cross-sectional width of the fluid divider (31) is larger in the front and smaller in the back.