Quick connector for joint

Abstract

The invention discloses a quick connector for joints. The quick connector comprises a connector body, a piston assembly, a clamping assembly and a communicating piece. One end of the connector body is connected with an external pipeline, the other end of the connector body is connected with an external joint, and the connector body is hollow and provided with a piston cavity; the piston assembly comprises a piston and a first wedge-shaped assembly fixedly connected to the piston, the piston is arranged in the piston cavity, positive pressure and / or negative pressure are / is supplied to cavity bodies on the two sides of the piston so that the piston can move in the piston cavity in the first direction, and the first wedge-shaped assembly is synchronously driven to move; the clamping assembly comprises a second wedge-shaped assembly, the second wedge-shaped assembly is in wedge-shaped fit with the first wedge-shaped assembly, and the second wedge-shaped assembly moves in the second direction under the action of the first wedge-shaped assembly so as to clamp and lock the external connector; the communicating piece penetrates through the piston assembly, one end of the communicating piece communicates with an external pipeline, and the other end communicates with an external connector. According to the invention, rapid sealing connection of the joint can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of joint connection, and in particular to a joint quick connector. Background Art

[0002] At present, when connecting pipeline interfaces or instrument joints, a threaded sealing connection method is usually adopted, that is, one connection end is provided with an internal thread, and the other connection end is provided with an external thread, and the sealing connection of the two connection ends is achieved through the meshing action of the external thread and the internal thread. However, the threaded sealing connection method basically relies on manual hand-tightening connection, which is troublesome to install. In many cases, pipeline interfaces or instrument joints only need to be temporarily sealed. After the sealing connection is released, it still needs to be manually disassembled again by hand. Therefore, the connection and disassembly method of manual hand-tightening is time-consuming and labor-intensive, and the work efficiency is not high. Summary of the invention

[0003] The object of the present invention is to provide a joint quick connector to solve the problem that the existing manual hand-tightening connection method is time-consuming, labor-intensive and has low work efficiency.

[0004] In order to solve the above problems, the present invention adopts the following technical solutions: A quick connector, characterized in that it comprises: a connector body, a piston assembly, a clamping assembly and a connecting piece; A connector body, one end of which is used to connect to an external pipeline, and the other end of which is used to connect to an external joint, and a piston cavity is provided in the hollow of the connector body; The piston assembly is arranged in the connector body, and comprises: a piston and a first wedge assembly fixedly connected to the piston, the piston is installed in the piston cavity, and the piston moves in the piston cavity along the first direction by supplying positive pressure and / or negative pressure to the cavities on both sides of the piston, and at the same time drives the first wedge assembly to move synchronously along the first direction; The clamping assembly includes a second wedge assembly movably mounted on the connector body, the second wedge assembly is wedge-matched with the first wedge assembly, and the second wedge assembly moves along the second direction under the action of the first wedge assembly to clamp and lock the external device connector; A connecting piece runs through the piston assembly, and a connecting hole is provided in the connecting piece. One end of the connecting hole is sealed and connected to an external pipeline, and the other end of the connecting hole is sealed and connected to an external joint when the second wedge assembly clamps and locks the external joint.

[0005] Optionally, the connecting piece can be moved along a first direction toward the external device connector to achieve a sealed and tight connection with the external device connector.

[0006] Optionally, an installation cavity is provided in the connector body, and one end of the connecting piece close to the external pipeline can be movably installed in the installation cavity. A second sealing ring is provided on the outer wall of the connecting piece corresponding to the installation cavity. The second sealing ring is used to seal the gap between the installation cavity and the connecting piece, and when the connecting piece slides along the first direction relative to the installation cavity, the connection sealing between the external pipeline and the connecting hole is maintained.

[0007] Optionally, the piston chamber is divided into a first chamber and a second chamber with variable volumes by the piston; The connector body is provided with a first drive hole and a second drive hole at the positions of the first cavity and the second cavity corresponding to the piston cavity, respectively; the first drive hole is used to supply positive pressure to the first cavity to drive the piston to move downward, and the second drive hole is used to supply positive pressure to the second cavity to drive the piston to move upward; or the first drive hole is used to supply negative pressure to the first cavity to drive the piston to move upward, and the second drive hole is used to supply negative pressure to the second cavity to drive the piston to move downward; or A first driving hole is provided at a first cavity position of the connector body corresponding to the piston cavity; when positive pressure is supplied to the first cavity through the first driving hole, the piston is driven to move downward, and when negative pressure is supplied to the first cavity through the first driving hole, the piston is driven to move upward; or A second driving hole is provided at the second cavity position of the connector body corresponding to the piston cavity; when positive pressure is supplied to the second cavity through the second driving hole, the piston is driven to move upward, and when negative pressure is supplied to the second cavity through the second driving hole, the piston is driven to move downward.

[0008] Optionally, the piston assembly further includes a linkage portion, the piston is fixedly connected to the first wedge assembly through the linkage portion, a through hole is provided on the side of the piston cavity close to the clamping assembly of the connector body, the first wedge assembly includes a fixing seat, the linkage portion passes through the through hole and is fixedly connected to the fixing seat of the first wedge assembly; A third sealing ring is embedded in the inner wall of the through hole, and the third sealing ring is used to seal the gap between the through hole and the linkage part to ensure that the sealing of the piston cavity is maintained when the linkage part moves relative to the through hole.

[0009] Optionally, the first wedge assembly includes a plurality of first wedge blocks, and the plurality of first wedge blocks are arranged on the fixing seat at intervals and distributed in a ring shape; The second wedge assembly includes a plurality of second wedge blocks, the plurality of second wedge blocks correspond to the plurality of first wedge blocks one by one, and are wedge-matched respectively; Each first wedge block includes a guide groove and two first wedge surfaces symmetrically located on both sides of the guide groove, and each second wedge block includes a guide block and two second wedge surfaces symmetrically located on both sides of the guide block; The guide block can move relative to the guide groove, and each first wedge block and the corresponding second wedge block can move in a plane under the guidance of the guide block and the guide groove; The two first wedge surfaces of the first wedge block respectively cooperate with the two second wedge surfaces of the corresponding second wedge blocks in an inclined sliding manner, and the multiple second wedge blocks are tightened under the inclined sliding action of the first wedge surfaces and the second wedge surfaces to clamp and lock the external device connector.

[0010] Optionally, the second wedge assembly also includes a plurality of reset members, each reset member includes a reset rod and a reset spring, the reset rod passes through the connector body and is fixedly connected to the corresponding second wedge block, one end of the reset spring acts on the connector body, and the other end acts on the reset rod to provide a reset force corresponding to the second wedge block.

[0011] Optionally, the piston comprises an inner convex ring and an outer convex ring which are staggered, and the inner convex ring is farther away from the first wedge-shaped component than the outer convex ring; The inner convex ring and the outer convex ring are respectively embedded with a fourth sealing ring and a fifth sealing ring. The fourth sealing ring is used to seal the inner side surface of the piston with the inner cavity wall of the piston cavity, and the fifth sealing ring is used to seal the outer side surface of the piston with the outer cavity wall of the piston cavity.

[0012] Optionally, a first convex ring is provided on the outer side wall of the connecting piece; A limit surface is provided on the connector body at a position corresponding to the first convex ring, and the limit surface abuts against the first convex ring to limit the movement range of the connecting piece along the first direction; or a shoulder surface is provided on the linkage part, and the shoulder surface abuts against the first convex ring to limit the movement range of the connecting piece along the first direction, and when the piston assembly moves downward, the shoulder surface of the linkage part presses against the first convex ring of the connecting piece, driving the connecting piece to move downward synchronously.

[0013] Optionally, a second convex ring is provided on the outer side wall of the connecting piece, the second convex ring is located between the first convex ring and the second sealing ring, and a sixth sealing ring is nested on the outer side of the second convex ring; When the connecting piece is installed in the installation cavity, the outer wall of the connecting piece, the inner wall of the installation cavity, and the second convex ring together form a closed cavity; The connector body is also provided with at least one connecting hole connecting the sealed cavity and the piston cavity; The piston is recessed at a position corresponding to at least one connecting hole to form an exhaust passage; According to the activity state of the piston in the piston chamber, the sealed chamber is alternately connected with the second chamber or the exhaust channel through at least one connecting hole.

[0014] By adopting the above technical solution, the present invention has the following advantages: 1. The joint quick connector of the present invention can realize the rapid sealing connection of the external joint, replacing the traditional connection method of manually screwing nuts or screws, simplifying the joint, especially the connection complexity of the external threaded joint, further improving the efficiency of the joint sealing connection, and promoting the development of the automation direction of the joint connection.

[0015] 2. The joint quick connector of the present invention has high structural stability and high sealing performance, can achieve stable connection with external joints, and effectively avoid connection dislocation, air leakage, liquid leakage or pressure leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the three-dimensional structure of a joint quick connector according to a first embodiment of the present invention; Figure 2 yes Figure 1 One of the three-dimensional exploded diagrams of the connector quick connector; Figure 3 yes Figure 1 The second three-dimensional exploded diagram of the quick connector; Figure 4 yes Figure 1 One of the cross-sectional structural schematic diagrams of the joint quick connector; Figure 5 yes Figure 1 The second schematic diagram of the cross-sectional structure of the quick connector; Figure 6 is a schematic cross-sectional structural diagram of a joint quick connector in a loosened state according to a second embodiment of the present invention; Figure 7 It is a schematic cross-sectional structural diagram of a joint quick connector in a clamped state according to a second embodiment of the present invention.

[0017] Reference numerals: 100. Quick connector; 10. Connector body, 11. Piston cavity, 111. First cavity, 112. Second cavity, 113. Through hole, 114. Connecting hole, 12. First drive hole, 13. Second drive hole, 14. Mounting cavity, 141. Third sealing ring, 15. First body, 16. Second body, 17. Third body, 18. Fourth body, 19. Limiting surface; 20. Piston assembly, 21. Piston, 211. Inner convex ring, 212. Outer convex ring, 213. Fourth sealing ring, 214. Fifth sealing ring, 215. Exhaust passage, 22. First wedge assembly, 221. Fixed seat, 222. First wedge block, 2221. Guide groove, 2222. First wedge surface, 23. Linkage part, 231. Shoulder surface; 30. Clamping assembly, 31. Second wedge assembly, 311. Second wedge block, 3111. Guide block, 3112. Second wedge surface, 312. Reset member, 3121. Reset rod, 3122. Reset spring; 40. connecting piece, 41. connecting hole, 42. first sealing ring, 43. first convex ring, 44. second sealing ring, 46. second convex ring, 47. sixth sealing ring; 50. Sealed cavity. DETAILED DESCRIPTION

[0018] In order to make the technical purpose, technical solution and beneficial effects of the present invention clearer, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] like Figure 1-5 As shown, the first embodiment of the present invention provides a joint quick connector 100, comprising: a connector body 10, a piston assembly 20, a clamping assembly 30 and a connecting piece 40; A connector body 10, one end of which is used to connect to an external pipeline, and the other end of which is used to connect to an external joint; a piston chamber 11 is provided in the hollow of the connector body 10; The piston assembly 20 is disposed in the connector body 10, and includes: a piston 21 and a first wedge assembly 22 fixedly connected to the piston 21. The piston 21 is installed in the piston cavity 11, and the piston 21 is moved in the piston cavity 11 along the first direction by supplying positive pressure and / or negative pressure to the cavities on both sides of the piston 21, and the first wedge assembly 22 is driven to move in the first direction synchronously; The clamping assembly 30 includes a second wedge assembly 31 movably mounted on the connector body 10, the second wedge assembly 31 is wedge-matched with the first wedge assembly 22, and the second wedge assembly 31 moves along the second direction under the action of the first wedge assembly 22 to clamp and lock the external device connector; The connecting piece 40 passes through the piston assembly 20 and has a connecting hole 41 in the hollow of the connecting piece 40. One end of the connecting hole 41 is sealed and connected to the external pipeline, and the other end of the connecting hole 41 is sealed and connected to the external joint when the second wedge assembly 31 clamps and locks the external joint.

[0020] It should be noted that the first direction of the present invention is preferably a vertical direction, corresponding to the y-axis direction in the figure, and the second direction is preferably a parallel direction, corresponding to the x-axis direction in the figure, but not limited thereto.

[0021] According to an embodiment of the present invention, the connecting piece 40 can move along a first direction relative to the piston assembly 20. When high pressure passes through the external pipeline, the connecting piece 40 can move along the first direction toward the external connector under the action of high pressure and achieve a sealed and tight connection with the external connector.

[0022] It can be understood that a sealing gasket is provided at the upper end of the connecting piece 40, and the sealing gasket is used to improve the sealing performance between the connecting piece 40 and the external connector.

[0023] It is understood that when the external pipeline passes through high-pressure gas or liquid, the lower end of the connecting piece 40 is pushed upward by the high pressure and is tightly connected to the external connector. The greater the pressure of the high-pressure gas or liquid, the higher the sealing performance of the connection between the connecting piece 40 and the external connector.

[0024] It can be understood that the area of ​​the pressure surface of the lower end of the connecting piece 40 along the first direction is larger than the area of ​​the pressure surface of the upper end of the connecting piece 40 along the first direction. In this way, when the external pipeline passes through high-pressure gas or liquid, the high-pressure gas or liquid will fill the connecting hole. At this time, the pressure surface of the lower end of the connecting piece 40 generates an upward pressure force under the action of pressure, that is, F1=P1*S1, where P1 is the pressure of the high-pressure gas or liquid, and S1 is the pressure area of ​​the lower end of the connecting piece; the pressure surface of the upper end of the connecting piece 40 generates a downward pressure force under the same pressure, that is, F2=P1*S2, S2 is the pressure area of ​​the upper end of the connecting piece 40. Since the pressure surface of the upper end is larger than the pressure surface of the lower end, an upward holding force F3=F1-F2=P1*(S1-S2) will be generated on the connecting piece 40, thereby pushing the connecting piece 40 upward to tightly contact with the external connector. And as the pressure of the high-pressure gas or liquid increases, the driving force becomes greater, thereby achieving a sealed connection.

[0025] Since the upward holding force F3 of the connecting piece 40 increases with the pressure of the high-pressure gas or liquid, the maximum value of the pressure of the high-pressure gas or liquid is preset to P3. In order to overcome the upward holding force F3 of the connecting piece 40 acting on the opening force F4 of the clamping assembly and realize the stable clamping of the external connector by the clamping assembly, it is necessary to ensure that the clamping force F5 of the clamping assembly is greater than the opening force F4.

[0026] The preset external connector is an external thread connector, and the thread angle of the external thread is b, then the opening force F4 = F3*sin(b / 2)*cos(b / 2)=P3*(S1-S2)*sin(b / 2)*cos(b / 2).

[0027] The clamping force F5 of the clamping assembly comes from the piston assembly. The piston 21 is subjected to the positive pressure and / or negative pressure of the cavities on both sides. The area of ​​the piston 21 is preset to be S3, and the pressure it is subjected to is P2. Then the upward thrust of the piston 21 is F6=P2*S3; the angle of the preset wedge fit is a; then F5= F6*sina*cosa= P2*S3*sina*cosa. In order to satisfy that the clamping force F5 is greater than the opening force F4, it is necessary to satisfy that P2*S3*sina*cosa is greater than P3*(S1-S2)*sin(b / 2)*cos(b / 2).

[0028] According to an embodiment of the present invention, a first sealing ring 42 is fixedly sleeved on the outer wall of the connecting piece 40 corresponding to the piston assembly 20. The first sealing ring 42 is used to seal the gap between the connecting piece 40 and the piston assembly 20, and ensure the sealing of the piston chamber 11 when the connecting piece 40 and the piston assembly 20 move relative to each other.

[0029] It can be understood that the sealing of the second chamber 112 of the piston chamber 11 can be ensured by the first sealing ring 42 .

[0030] According to an embodiment of the present invention, a first convex ring 43 is sleeved on the outer wall of the connecting piece 40, and a limiting surface 19 is provided at a position corresponding to the first convex ring 43 of the connector body 10. The limiting surface 19 resists the first convex ring 43 to limit the movement range of the connecting piece 40 along the first direction.

[0031] It can be understood that when the connecting piece 40 receives pipeline air pressure or hydraulic pressure, it will move upward. If there is no limiting effect of the first convex ring 43 and the limiting surface 19, the connecting piece 40 may fall out from the upper end of the joint quick connector. Therefore, by providing the first convex ring 43 and the limiting surface 19, the risk of the connecting piece 40 falling out from the upper end of the joint quick connector when it is pressed or tilted and inverted can be effectively prevented, further improving the structural stability of the connector.

[0032] According to an embodiment of the present invention, an installation cavity 14 is provided in the end of the connector body 10 close to the external pipeline, and the end of the connecting piece 40 close to the external pipeline can be movably installed in the installation cavity 14. The connecting piece 40 is provided with a second sealing ring 44 on the outer wall corresponding to the installation cavity 14. The second sealing ring 44 is used to seal the gap between the installation cavity 14 and the connecting piece 40, and when the connecting piece 40 slides along the first direction relative to the installation cavity 14, the connection sealing between the external pipeline and the connecting hole 41 is maintained.

[0033] It can be understood that the inner diameter of the installation cavity 14 and the outer diameter of the connecting piece 40 are adapted to each other, but the invention is not limited thereto.

[0034] According to an embodiment of the present invention, the piston chamber 11 is divided into a first chamber 111 and a second chamber 112 by the piston 21; The connector body 10 is provided with a first driving hole 12 and a second driving hole 13 at positions corresponding to the first cavity 111 and the second cavity 112 of the piston cavity 11, respectively; the first driving hole 12 is used to supply positive pressure to the first cavity 111 to drive the piston 21 to move downward, and the second driving hole 13 is used to supply positive pressure to the second cavity 112 to drive the piston to move upward; or The connector body 10 is provided with a first driving hole 12 and a second driving hole 13 at positions corresponding to the first cavity 111 and the second cavity 112 of the piston cavity 11; the piston cavity 11 is divided into the first cavity 111 and the second cavity 112 by the piston 21, the first driving hole 12 is used to supply negative pressure to the first cavity 111 to drive the piston 21 to move upward, and the second driving hole 13 is used to supply negative pressure to the second cavity 112 to drive the piston to move downward; or The connector body 10 is provided with a first driving hole 12 at a position corresponding to the first cavity 111 of the piston cavity 11; when positive pressure is supplied to the first cavity 111 through the first driving hole 12, the piston 21 is driven to move downward, and when negative pressure is supplied to the first cavity 111 through the first driving hole 12, the piston is driven to move upward; or A second driving hole 13 is opened at the position of the second cavity 112 of the piston cavity 11 of the connector body 10; when positive pressure is supplied to the second cavity 112 through the second driving hole 13, the piston 21 is driven to move upward, and when negative pressure is supplied to the second cavity 112 through the second driving hole 13, the piston is driven to move downward.

[0035] When the first driving mode is adopted, if the first driving hole 12 supplies driving fluid to the first chamber 111, the pressure of the first chamber 111 increases, which will push the piston to move downward, and the first wedge assembly moves downward, and the second wedge assembly can be opened under the action of the reset member. If the second driving hole 13 supplies driving fluid to the second chamber 112, the pressure of the second chamber 112 increases, which will push the piston to move upward, and the first wedge assembly moves upward. Under the action of the first wedge assembly, the second wedge assembly tightens and clamps and locks the external joint along the second direction. The latter three driving modes can refer to the first driving mode and can also realize the second wedge assembly clamping and locking the external joint.

[0036] It can be understood that the first chamber 111 and the second chamber 112 in this embodiment are relative to the first direction, and the volumes of the first chamber 111 and the second chamber 112 are not fixed, but change alternately with the movement of the piston 21 in the piston chamber 11 .

[0037] According to an embodiment of the present invention, the piston assembly 20 also includes a linkage portion 23, and the piston 21 is fixedly connected to the first wedge assembly 22 through the linkage portion 23. The connector body 10 has a through hole 113 on one side of the piston cavity 11 close to the clamping assembly 30. The first wedge assembly 22 includes a fixed seat 221. The linkage portion 23 passes through the through hole 113 and is fixedly connected to the fixed seat 221 of the first wedge assembly 22.

[0038] According to an embodiment of the present invention, a third sealing ring 141 is embedded in the inner wall of the through hole 113, and the third sealing ring 141 is used to seal the gap between the through hole 113 and the linkage part 23 to ensure that the sealing of the piston chamber 11 is always maintained when the linkage part 23 moves relative to the through hole 113.

[0039] According to an embodiment of the present invention, the first wedge assembly 22 includes a plurality of first wedge blocks 222, and the plurality of first wedge blocks 222 are arranged on the fixing seat 221 at intervals and are distributed in a ring shape; The second wedge assembly 31 includes a plurality of second wedge blocks 311, and the plurality of second wedge blocks 311 correspond to the plurality of first wedge blocks 222 one by one and perform wedge-shaped cooperation respectively; Each first wedge block 222 includes a guide groove 2221 and two first wedge surfaces 2222 symmetrically located on both sides of the guide groove 2221, and each second wedge block 311 includes a guide block 3111 and two second wedge surfaces 3112 symmetrically located on both sides of the guide block 3111; The guide block 3111 can move relative to the guide groove 2221, and each first wedge block 222 and the corresponding second wedge block 311 can move in the same plane under the guidance of the guide block 3111 and the guide groove 2221; The two first wedge surfaces 2222 of the first wedge block 222 respectively cooperate with the two second wedge surfaces 3112 of the corresponding second wedge block 311 in an inclined sliding manner, and the multiple second wedge blocks 311 are tightened under the inclined sliding action of the first wedge surfaces 2222 and the second wedge surfaces 3112 to clamp and lock the external device connector.

[0040] In this embodiment, the external joint is an external threaded joint, and the inner wall of each second wedge block 311 is provided with an internal thread. When the multiple second wedge blocks 311 are tightened toward the middle, the internal threads of the multiple second wedge blocks 311 can engage with the external threads of the external threaded joint, thereby realizing a quick connection of the external threaded joint.

[0041] According to an embodiment of the present invention, the second wedge assembly 31 also includes a plurality of reset members 312, each reset member 312 includes a reset rod 3121 and a reset spring 3122, the reset rod 3121 passes through the connector body 10 and is fixedly connected to the corresponding second wedge block 311, one end of the reset spring 3122 acts on the connector body 10, and the other end acts on the reset rod 3121 to provide a reset force corresponding to the second wedge block 311.

[0042] It can be understood that the reset rod 3121 passes through the connector body 10 and is fixedly connected to the guide block 3111 on the corresponding second wedge block 311. The reset spring 3122 can be a spring or a tension spring. In this embodiment, a spring is used, and a boss is provided at one end of the reset rod away from the corresponding second wedge block. The spring is sleeved on the reset rod, one end of the spring elastically presses against the boss of the reset rod, and the other end presses against the connector body.

[0043] In this embodiment, two reset members 312 correspond to one second wedge block 311, and the two reset members 312 are arranged at intervals along the first direction at both ends of the second wedge block 311. It can be understood that since each second wedge block 311 needs to maintain a high clamping stability when clamping and locking the external device connector, if the second wedge block 311 is tilted, the clamping will be loosened. Therefore, the present invention arranges two reset members 312 along the first direction, and the two reset rods 3121 respectively penetrate the connector body 10, so as to ensure that the second wedge block 311 can stably move along the second direction and will not deviate relative to the second direction, thereby avoiding the phenomenon of clamping looseness.

[0044] It can be understood that the connector body 10 can be an integrally formed part. For the convenience of processing, the connector body 10 can also be assembled from split parts, for example, it can be divided into a first body 15, a second body 16, a third body 17 and a fourth body 18, the first body 15, the second body 16 and the third body 17 are fixedly connected in sequence, and the fourth body 18 is clamped and fixed between the second body 16 and the third body 17 to provide a limit surface 19; the first body 15 is used to install the second wedge assembly 31, and the second body 16 and the third body 17 are jointly enclosed to form a piston cavity 11 for movably accommodating the piston 21. The installation cavity 14 is opened in the third body 17. But it is not limited to this.

[0045] In order to further fully explain the joint quick connector 100, the working principle of the joint quick connector 100 of the first embodiment is introduced below.

[0046] When it is necessary to connect an external connector, the external gas source supplies a driving fluid (such as gas) to the second chamber 112 through the second driving hole 13, and the pressure of the second chamber 112 increases, which will push the piston 21 to move upward, and simultaneously drive the first wedge assembly 22 to move upward. Under the inclined sliding action of the first wedge surface 2222 and the second wedge surface 3112, the multiple second wedge blocks 311 respectively overcome the reset force of the reset spring 3122 to tighten to clamp and lock the external connector. At the same time, the external pipeline is passed through high-pressure gas or liquid, and the lower end of the connecting piece 40 is subjected to the high-pressure pressure, which will be pushed upward and tightly connected to the external connector. And the greater the pressure of the high-pressure gas or liquid, the higher the sealing of the connection between the connecting piece 40 and the external connector. Thereby effectively preventing the risk of leakage.

[0047] When the external connector needs to be loosened, the high-pressure gas or liquid is disconnected from the external pipeline, and the lower end of the connecting piece 40 is no longer subjected to the high-pressure pressure. The sealing tight connection between the connecting piece 40 and the external connector is loosened, that is, the connecting piece 40 and the external connector remain in a loose state, and the connecting piece 40 may slide downward under its own gravity and separate from the external connector. The external gas source supplies the driving fluid (such as gas) to the first chamber 111 through the first driving hole 12, and the pressure of the first chamber 111 increases, which will push the piston 21 to move downward, and at the same time drive the first wedge assembly 22 to move downward. After losing the corresponding inclined surface resistance force of the first wedge block 222, the second wedge blocks 311 of the plurality of second wedge assemblies 31 can be opened outward under the reset force of the reset spring 3122, thereby loosening the external connector.

[0048] It is understandable that the external device connector may be a pipe connector or a pressure instrument connector, but is not limited thereto.

[0049] like Figure 6-7 As shown, the second embodiment of the present invention also provides another quick connector, which is different from the first embodiment in the following aspects: It should be noted that the quick connector of the second embodiment has the same symbols as the quick connector of the first embodiment for the same components. Figure 6 The cross-sectional structure diagram shows a loosened state of a joint quick connector according to a second embodiment of the present invention. Figure 7 The cross-sectional structure diagram shows a clamped state of a joint quick connector according to a second embodiment of the present invention.

[0050] Specifically, the piston 21 includes an inner convex ring 211 and an outer convex ring 212 which are staggered, and the inner convex ring 211 is farther away from the first wedge assembly 22 than the outer convex ring 212; The inner convex ring 211 and the outer convex ring 212 are respectively embedded with a fourth sealing ring 213 and a fifth sealing ring 214. The fourth sealing ring 213 is used to seal the inner side surface of the piston 21 with the inner cavity wall of the piston cavity 11, and the fifth sealing ring 214 is used to seal the outer side surface of the piston 21 with the outer cavity wall of the piston cavity.

[0051] A first convex ring 43 is provided on the outer wall of the connecting piece 40; the linkage portion 23 is provided with a shoulder surface 231, and the shoulder surface 231 abuts against the first convex ring 43 to limit the movement range of the connecting piece 40 along the first direction, and when the piston assembly 20 moves downward, the shoulder surface 231 of the linkage portion 23 presses against the first convex ring 43 of the connecting piece, driving the connecting piece 40 to move downward synchronously.

[0052] A second convex ring 46 is provided on the outer wall of the connecting member 40. The second convex ring 46 is located between the first convex ring 43 and the second sealing ring 44. A sixth sealing ring 47 is embedded on the outer side of the second convex ring 46. When the connecting member 40 is installed in the installation cavity 14, the outer wall of the connecting member 40, the inner wall of the installation cavity 14, and the second protruding ring 46 together form a closed cavity 50; The connector body 10 is also provided with at least one connecting hole 114 connecting the sealed cavity 50 and the piston cavity 11; The piston 21 is recessed at a position corresponding to at least one connecting hole 114 to form an exhaust passage 215; According to the activity state of the piston 21 in the piston chamber 11 , the sealed chamber 50 is alternately connected with the second chamber 112 or the exhaust passage 215 through at least one connecting hole 114 .

[0053] It can be understood that the sealed cavity 50 is located between the second sealing ring 44 and the sixth sealing ring 47 , and the second sealing ring 44 and the sixth sealing ring 47 are used to ensure that the sealing of the sealed cavity 50 is always maintained when the connecting piece 40 moves relative to the installation cavity 14 .

[0054] In order to further fully explain the joint quick connector 100, the working principle of the joint quick connector 100 of the second embodiment is introduced below.

[0055] When it is necessary to connect an external connector, the external air source supplies a driving fluid (such as gas) to the second chamber 112 through the second driving hole 13. The pressure of the second chamber 112 increases, which will push the piston 21 to move upward, and simultaneously drive the first wedge assembly 22 to move upward. At this time, the fourth sealing ring 213 on the inner convex ring 211 of the piston is below the connecting hole 114. Under the inclined sliding action of the first wedge surface 2222 and the second wedge surface 3112, the multiple second wedge blocks 311 respectively overcome the restoring force of the restoring spring 3122 to tighten to clamp and lock the external connector. When the piston moves upward to the maximum, at this time, the fourth sealing ring 213 on the inner convex ring 211 of the piston is above the connecting hole 114, and the closed cavity 50 is connected to the second cavity 112 through the connecting hole 114, and the pressurized gas in the second cavity 112 enters the closed cavity 50 through the connecting hole 114, thereby pressurizing the closed cavity 50, thereby prompting the connecting piece 40 to press against the external connector upward, and squeeze the seal between the two to deform to achieve a sealed connection between the connecting piece 40 and the external connector. Later, when the external pipeline passes high-pressure gas or liquid, the lower end of the connecting piece 40 is affected by the high-pressure pressure, and will be pushed upward and tightly connected to the external connector. And the greater the pressure of the high-pressure gas or liquid, the higher the sealing of the connection between the connecting piece 40 and the external connector. Thereby effectively preventing the risk of leakage.

[0056] When the external joint needs to be loosened, the high-pressure gas or liquid is disconnected from the external pipeline, and the lower end of the connecting piece 40 is no longer affected by the high pressure in the external pipeline. The external gas source supplies the driving fluid (such as gas) to the first chamber 111 through the first driving hole 12, and the pressure of the first chamber 111 increases, which will push the piston 21 to move downward, and at the same time drive the first wedge assembly 22 to move downward. After losing the inclined surface resistance force of the corresponding first wedge block 222, the second wedge blocks 311 of the plurality of second wedge assemblies 31 can be opened outward under the reset force of the reset spring 3122, thereby loosening the external joint. At the same time, the shoulder surface 231 of the linkage part 23 presses against the first convex ring 43 of the connecting piece 40, driving the connecting piece 40 to move downward synchronously, and the volume of the closed cavity 50 continues to decrease. Because in the initial stage of the downward movement of the piston assembly, the fourth sealing ring 213 on the inner convex ring 211 of the piston is above the connecting hole 114. At this time, the closed cavity 50 is connected with the second cavity 112 through the connecting hole 114, and the excess gas due to the shrinkage of the closed cavity 50 is discharged to the second cavity 112 through the connecting hole 114 (at this time, the second cavity 112 is in an atmospheric state), and is smoothly discharged to the atmosphere. As the piston assembly moves downward, when the fourth sealing ring 213 on the inner convex ring 211 of the piston is below the connecting hole 114, at this time, the closed cavity 50 is connected to the exhaust channel 215 through the connecting hole 114, and the excess gas of the closed cavity 50 due to the shrinkage volume is smoothly discharged through the connecting hole 114 and the exhaust channel 215, and will not cause the problem of the closed cavity 50 being hindered from moving downward due to the increase in pressure due to the shrinkage volume. Then, the connecting piece 40 is reset to the lowest end to prepare for the next insertion of the external connector. It can be understood that if the connecting piece 40 cannot be reset to the low end, the external connector will not be fully inserted due to the obstruction of the connecting piece 40, which may easily lead to the risk of connection failure of the clamping assembly due to insufficient thread depth of the clamping external connector.

[0057] The connector quick connector 100 of the present invention can realize a quick sealed connection to an external connector, replacing the traditional connection method of manually screwing nuts or screws, simplifying the connector, especially the connection complexity of the external threaded connector, further improving the efficiency of the connector sealing connection, and promoting the development of the automation direction of the connector connection. At the same time, the connector quick connector 100 of the present invention has high structural stability and high sealing performance, can realize a stable connection with an external connector, and effectively avoid the phenomenon of connection dislocation, air leakage, liquid leakage or pressure leakage.

[0058] The above embodiments do not impose any formal limitations on the shape, material, structure, etc. of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

Claims

1. A quick connector, characterized in that: include: Connector body, piston assembly, clamping assembly and connecting piece; A connector body, one end of which is used to connect to an external pipeline, and the other end of which is used to connect to an external joint, and a piston cavity is provided in the hollow of the connector body; The piston assembly is arranged in the connector body, and comprises: a piston and a first wedge assembly fixedly connected to the piston, the piston is installed in the piston cavity, and the piston moves in the piston cavity along the first direction by supplying positive pressure and / or negative pressure to the cavities on both sides of the piston, and at the same time drives the first wedge assembly to move synchronously along the first direction; The clamping assembly includes a second wedge assembly movably mounted on the connector body, the second wedge assembly is wedge-matched with the first wedge assembly, and the second wedge assembly moves along the second direction under the action of the first wedge assembly to clamp and lock the external device connector; A connecting piece runs through the piston assembly, and a connecting hole is provided in the connecting piece. One end of the connecting hole is sealed and connected to an external pipeline, and the other end of the connecting hole is sealed and connected to an external joint when the second wedge assembly clamps and locks the external joint.

2. A quick connector according to claim 1, characterized in that: The connecting piece can move toward the external device connector along a first direction to achieve a sealed and tight connection with the external device connector.

3. A quick connector according to claim 1, characterized in that: An installation cavity is provided in the connector body, and one end of the connecting piece close to the external pipeline can be movably installed in the installation cavity. A second sealing ring is provided on the outer wall of the connecting piece corresponding to the installation cavity. The second sealing ring is used to seal the gap between the installation cavity and the connecting piece, and when the connecting piece slides along a first direction relative to the installation cavity, the connection sealing between the external pipeline and the connecting hole is maintained.

4. A quick connector according to claim 1, characterized in that: The piston chamber is divided into a first chamber and a second chamber with variable volumes by the piston; The connector body is provided with a first drive hole and a second drive hole at the positions of the first cavity and the second cavity corresponding to the piston cavity, respectively; the first drive hole is used to supply positive pressure to the first cavity to drive the piston to move downward, and the second drive hole is used to supply positive pressure to the second cavity to drive the piston to move upward; or the first drive hole is used to supply negative pressure to the first cavity to drive the piston to move upward, and the second drive hole is used to supply negative pressure to the second cavity to drive the piston to move downward; or A first driving hole is provided at a first cavity position of the connector body corresponding to the piston cavity; when positive pressure is supplied to the first cavity through the first driving hole, the piston is driven to move downward, and when negative pressure is supplied to the first cavity through the first driving hole, the piston is driven to move upward; or A second driving hole is provided at the second cavity position of the connector body corresponding to the piston cavity; when positive pressure is supplied to the second cavity through the second driving hole, the piston is driven to move upward, and when negative pressure is supplied to the second cavity through the second driving hole, the piston is driven to move downward.

5. The quick connector according to claim 1, characterized in that: The piston assembly also includes a linkage part, through which the piston is fixedly connected to the first wedge assembly, a through hole is provided on the side of the piston cavity close to the clamping assembly of the connector body, the first wedge assembly includes a fixing seat, the linkage part passes through the through hole and is fixedly connected to the fixing seat of the first wedge assembly; A third sealing ring is embedded in the inner wall of the through hole, and the third sealing ring is used to seal the gap between the through hole and the linkage part to ensure that the sealing of the piston cavity is maintained when the linkage part moves relative to the through hole.

6. A joint quick connector according to claim 5, characterized in that: The first wedge assembly includes a plurality of first wedge blocks, which are arranged on the fixed seat at intervals and distributed in a ring shape; The second wedge assembly includes a plurality of second wedge blocks, the plurality of second wedge blocks correspond to the plurality of first wedge blocks one by one, and are wedge-matched respectively; Each first wedge block includes a guide groove and two first wedge surfaces symmetrically located on both sides of the guide groove, and each second wedge block includes a guide block and two second wedge surfaces symmetrically located on both sides of the guide block; The guide block can move relative to the guide groove, and each first wedge block and the corresponding second wedge block can move in a plane under the guidance of the guide block and the guide groove; The two first wedge surfaces of the first wedge block respectively cooperate with the two second wedge surfaces of the corresponding second wedge blocks in an inclined sliding manner, and the multiple second wedge blocks are tightened under the inclined sliding action of the first wedge surfaces and the second wedge surfaces to clamp and lock the external device connector.

7. A joint quick connector according to claim 6, characterized in that: The second wedge assembly also includes a plurality of reset parts, each of which includes a reset rod and a reset spring, the reset rod passes through the connector body and is fixedly connected to the corresponding second wedge block, one end of the reset spring acts on the connector body, and the other end acts on the reset rod to provide a reset force corresponding to the second wedge block.

8. A quick connector according to any one of claims 1 to 7, characterized in that: The piston comprises an inner convex ring and an outer convex ring which are staggered, and the inner convex ring is farther away from the first wedge-shaped component than the outer convex ring; The inner convex ring and the outer convex ring are respectively embedded with a fourth sealing ring and a fifth sealing ring. The fourth sealing ring is used to seal the inner side surface of the piston with the inner cavity wall of the piston cavity, and the fifth sealing ring is used to seal the outer side surface of the piston with the outer cavity wall of the piston cavity.

9. A quick connector according to any one of claims 1 to 7, characterized in that: A first convex ring is provided on the outer side wall of the connecting piece; A limit surface is provided on the connector body at a position corresponding to the first convex ring, and the limit surface abuts against the first convex ring to limit the movement range of the connecting piece along the first direction; or a shoulder surface is provided on the linkage part, and the shoulder surface abuts against the first convex ring to limit the movement range of the connecting piece along the first direction, and when the piston assembly moves downward, the shoulder surface of the linkage part presses against the first convex ring of the connecting piece, driving the connecting piece to move downward synchronously.

10. A joint quick connector according to claim 9, characterized in that: A second convex ring is provided on the outer wall of the connecting piece, the second convex ring is located between the first convex ring and the second sealing ring, and a sixth sealing ring is nested on the outer side of the second convex ring; When the connecting piece is installed in the installation cavity, the outer wall of the connecting piece, the inner wall of the installation cavity, and the second convex ring together form a closed cavity; The connector body is also provided with at least one connecting hole connecting the sealed cavity and the piston cavity; The piston is recessed at a position corresponding to at least one connecting hole to form an exhaust passage; According to the activity state of the piston in the piston chamber, the sealed chamber is alternately connected with the second chamber or the exhaust channel through at least one connecting hole.

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