A quick-change connector that is easy to process

Abstract

The present invention provides a quick-change connector that is easy to process, including a connector body, a connector sleeve, a connecting sleeve, a valve core, a valve core sleeve and a movable sleeve. The connector body and the connecting sleeve are connected by matching a first connecting thread with a third connecting thread, and the connector sleeve and the connecting sleeve are connected by matching a second connecting thread with a third connecting thread. A gap is left between the valve core sleeve and the valve core to form a fluid channel. The head of the valve core sleeve can be sealed on the sealing part of the valve core to close the fluid channel. The movable sleeve can push the valve core sleeve away from the sealing part of the valve core to open the fluid channel. The connector sleeve, connecting sleeve, valve core sleeve and other components of the present invention are straight-through round tubes, which are small in size, have fewer processing parts, save materials, are convenient for automated mechanical processing, have simple processes and low costs. Moreover, only local mechanical processing is required, which produces less debris and does not cause the problem of difficult chip removal. It can also ensure the concentricity of each component, facilitate assembly, and have stable product performance.

Description

Technical Field

[0001] The present invention relates to the technical field of quick-change joints, and in particular to a quick-change joint that is easy to process. Background Art

[0002] Quick-change connectors are widely used in the fields of petroleum, chemical industry, metallurgy, hydropower, engineering machinery, shipbuilding, electromechanical equipment, etc. due to their rapid plug-in and pull-out capabilities, one-way sealing, and non-return function. An existing quick-change connector includes a connector body, a connector sleeve, a connection sleeve, a valve core sleeve, and a valve core disposed in the valve core sleeve. The valve core is used to close or open the fluid channel within the quick-change connector. To facilitate the connection or installation of components such as springs, the connector sleeve, connection sleeve, and valve core sleeve will inevitably have a protruding portion on the outside. Therefore, during processing, it is necessary to select a pipe with a larger aperture, and then perform machining on the pipe to remove excess material to reserve the protruding portion. This wastes material, increases cost, and is also relatively large in size. Furthermore, a lot of debris is inevitably generated during the processing, making chip removal difficult and inconvenient. Furthermore, the inner and outer walls of the connector sleeve, connection sleeve, valve core sleeve, and other components need to be machined, making it difficult to ensure their concentricity, inconvenient for assembly, and unable to guarantee product performance. Summary of the Invention

[0003] The object of the present invention is to provide a quick-change connector that is easy to process and can solve the technical problems mentioned in the background technology.

[0004] To achieve the above-mentioned object, the technical solution of the present invention is as follows: a quick-change connector that is easy to process, comprising a hollow connector body, a connecting portion for connection provided at the tail of the connector body, and a first connecting thread for connection machined on the inner wall of the head of the connector body;

[0005] A joint sleeve, which is a straight-through round tube, has a second connecting thread machined on the inner wall of the tail of the joint sleeve for connection, and a locking mechanism for connection is provided on the head of the joint sleeve;

[0006] A connecting sleeve, which is a straight round tube, and the outer wall of the connecting sleeve is processed with a third connecting thread for connection, the head of the connector body is installed outside the tail of the connecting sleeve, and the first connecting thread cooperates with the third connecting thread to connect the connector body to the connecting sleeve, and the tail of the connector sleeve is installed outside the head of the connecting sleeve, and the second connecting thread cooperates with the third connecting thread to connect the connector sleeve to the connecting sleeve;

[0007] a valve core, which is inserted into the joint body, the joint sleeve, and the connecting sleeve; the tail of the valve core is fixed between the joint body and the connecting sleeve via a valve seat; the valve seat has a valve seat hole for fluid to pass through, and the head of the valve core serves as a sealing portion;

[0008] a valve core sleeve, which is slidably disposed between the connecting sleeve and the valve core, and is a straight circular tube. A gap is left between the valve core sleeve and the valve core to form a fluid passage, and the outer wall of the tail of the valve core sleeve is in sliding and sealing contact with the inner wall of the connecting sleeve, and the head of the valve core sleeve can be sealed on the sealing portion of the valve core to close the fluid passage;

[0009] A movable sleeve is slidably arranged between the valve core sleeve and the joint sleeve. The movable sleeve can push the valve core sleeve away from the sealing part of the valve core to open the fluid channel. A reset member is provided on the outside of the valve core sleeve, which can move the valve core sleeve and the movable sleeve away from the connecting sleeve.

[0010] Preferably, a first retaining spring groove is machined on the outer wall of the valve core sleeve, a first retaining spring is installed in the first retaining spring groove, a retaining ring is installed on the outer sleeve of the valve core sleeve, and the retaining ring is blocked on the inner side of the first retaining spring, and the reset member includes a first spring and a second spring, the first spring is supported between the retaining ring and the connecting sleeve, the second spring is supported between the retaining ring and the movable sleeve or the second spring is supported between the movable sleeve and the connecting sleeve.

[0011] Preferably, a spring groove is machined on the end of the head of the connecting sleeve, and one end of the first spring is supported in the spring groove.

[0012] Preferably, no thread is provided in the middle of the outer wall of the connecting sleeve so that the third connecting thread is divided into two sections, one section of the third connecting thread cooperates with the first connecting thread, and the other section of the third connecting thread cooperates with the second connecting thread.

[0013] Preferably, a first valve seat shaft shoulder is machined on the inner wall of the tail portion of the connecting sleeve and blocks the inner side of the valve seat, and a second valve seat shaft shoulder is formed in the head portion of the joint body and blocks the outer side of the valve seat.

[0014] Preferably, a sealing groove is machined on the inner wall of the head of the connecting sleeve, and a sealing ring is provided in the sealing groove for sealing between the connecting sleeve and the valve core sleeve.

[0015] Preferably, a push shoulder is machined on the outer wall of the head of the valve core sleeve, the head of the movable sleeve shrinks inward to form a pushing portion located outside the push shoulder, the tail of the movable sleeve is provided with a limiting portion protruding outward, and a limiting shoulder located outside the limiting portion is machined on the inner wall of the head of the joint sleeve.

[0016] Preferably, the head of the joint sleeve is machined with a plurality of through holes evenly distributed along the circumference, the locking mechanism includes a locking sleeve and a plurality of steel balls, the steel balls are installed in the through holes one by one, the locking sleeve is sleeved outside the joint sleeve and forces the steel balls to be placed in the through holes, a third spring is provided between the tail of the locking sleeve and the joint sleeve, and an avoidance groove opposite to the steel balls is provided in the head of the locking sleeve.

[0017] Preferably, the head of the connector sleeve is located on the outside of the through hole and is machined with a second retaining ring groove, in which a second retaining ring is installed. The second retaining ring is used to prevent the locking sleeve from falling off the connector sleeve. The head of the connector sleeve is located on the inside of the through hole and is machined with a spring shoulder, and one end of the third spring rests on the spring shoulder.

[0018] Preferably, a sealing ring is provided between the connecting sleeve and the joint body.

[0019] Compared with the prior art, the beneficial effects of the present invention are that the joint sleeve, connecting sleeve, valve core sleeve and other components of the present invention are selected from straight-through round tubes, which are small in size and have fewer processing parts, can save materials, and are convenient for automated mechanical processing, with a simple process and low cost; and only local mechanical processing is required, resulting in less debris and no problem of chip removal difficulties. The concentricity of each component can also be guaranteed, facilitating assembly and ensuring stable product performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 It is a cross-sectional view of the connecting sleeve of the present invention.

[0022] Figure 3 It is a cross-sectional view of the movable sleeve of the present invention.

[0023] Figure 4 It is a cross-sectional view of the joint sleeve of the present invention.

[0024] Figure 5 It is a cross-sectional view of the valve core sleeve of the present invention. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0026] like Figure 1-Figure 5As shown, the present invention provides a quick-change connector that is easy to process, including a hollow connector body 1. The tail of the connector body 1 is provided with a connecting portion 2 for connection, which can be an internal thread or an external thread. The inner wall of the head of the connector body 1 is machined with a first connecting thread 3 for connection.

[0027] A joint sleeve 4 is a straight round tube. A second connecting thread 5 for connection is machined on the inner wall of the tail of the joint sleeve 4. A locking mechanism for connection is provided on the head of the joint sleeve 5.

[0028] A connecting sleeve 6, which is a straight round tube, and a third connecting thread 7 for connection is machined on the outer wall of the connecting sleeve 6. The head of the joint body 1 is installed outside the tail of the connecting sleeve 6, and the first connecting thread 3 cooperates with the third connecting thread 7 to connect the joint body 1 to the connecting sleeve 6. The tail of the joint sleeve 4 is installed outside the head of the connecting sleeve 6, and the second connecting thread 5 cooperates with the third connecting thread 7 to connect the joint sleeve 4 to the connecting sleeve 4.

[0029] a valve core 8, which is inserted into the connector body 1, the connector sleeve 4, and the connecting sleeve 6. The tail of the valve core 8 is fixed between the connector body 1 and the connecting sleeve 6 by a valve seat 9. The valve seat 9 has a valve seat hole 10 for fluid to pass through. The head of the valve core 8 is a sealing portion 11;

[0030] a valve core sleeve 12, which is slidably disposed between the connecting sleeve 6 and the valve core 8. The valve core sleeve 12 is a straight round tube. A gap is left between the valve core sleeve 12 and the valve core 8 to form a fluid passage 13. The outer wall of the tail of the valve core sleeve 12 is in sliding and sealing contact with the inner wall of the connecting sleeve 6. The head of the valve core sleeve 12 can be sealed on the sealing portion of the valve core 8 to close the fluid passage;

[0031] A movable sleeve 14 is slidably arranged between the valve core sleeve 12 and the joint sleeve 4. The movable sleeve 14 can push the valve core sleeve 12 away from the sealing part of the valve core 8 to open the fluid channel 13. The valve core sleeve 12 is provided with a reset part outside the valve core sleeve 12 that can move the valve core sleeve 12 and the movable sleeve 14 away from the connecting sleeve 6.

[0032] When in use, the present invention is docked with another quick-change connector. The head of the quick-change connector is inserted into the connector sleeve 4 and pushes open the movable sleeve 14. The movable sleeve 14 pushes the valve core sleeve 12, and the valve core sleeve 12 no longer seals on the sealing portion 11 of the valve core 8, thereby opening the fluid channel 13. At the same time, the locking mechanism on the connector sleeve 4 fixes the head of the other quick-change connector, thus achieving a fixed connection between the two quick-change connectors. After the locking mechanism releases the head of the other quick-change connector, the head of the quick-change connector is withdrawn from the connector sleeve 4. The movable sleeve 14 and the valve core sleeve 12 are reset by the reset member, and the valve core sleeve 12 is once again sealed on the sealing portion 11 of the valve core 8, thereby closing the fluid channel 13.

[0033] Preferably, a first retaining spring groove 15 is machined on the outer wall of the valve core sleeve 12, and a first retaining spring 16 is installed in the first retaining spring groove 15. A retaining ring 17 is installed on the outer surface of the valve core sleeve 12, and the retaining ring 17 is blocked on the inner side of the first retaining spring 16. The reset member includes a first spring 18 and a second spring 19. The first spring 18 is supported between the retaining ring 17 and the connecting sleeve 6, and the second spring 19 is supported between the retaining ring 17 and the movable sleeve 14. The first spring 18 and the second spring 19 are arranged side by side, and there is a difference in elastic force between the two. Alternatively, the second spring 19 is supported between the movable sleeve 14 and the connecting sleeve 6, and the second spring 19 is sleeved on the outside of the first spring 18. There may be a difference in elastic force between the two, or there may not be a difference in elastic force. When in use, when pushing open the movable sleeve 14, it is necessary to overcome the elastic force of the second spring 19 and make the movable sleeve 14 approach the connecting sleeve 6. The movable sleeve 14 continues to move.

[0034] The elastic force of the first spring 18 is overcome and the valve core sleeve 12 is pushed close to the connecting sleeve 6 , so that the valve core sleeve 12 is no longer sealed on the sealing portion 11 of the valve core 8 , thereby opening the fluid channel 13 .

[0035] Preferably, a spring groove 20 is machined on the end of the head of the connecting sleeve 6 , and one end of the first spring 18 is supported in the spring groove 20 .

[0036] Preferably, the middle portion of the outer wall of the connecting sleeve 6 is not provided with threads, thereby dividing the third connecting thread 7 into two sections, one section of the third connecting thread 7 being mated with the first connecting thread 3, and the other section of the third connecting thread 7 being mated with the second connecting thread 5. The two sections of the third connecting thread 7 may have the same or opposite rotation directions.

[0037] Preferably, a first valve seat shoulder 21 is machined on the inner wall of the tail of the connecting sleeve 6 to block the inner side of the valve seat 9, and a second valve seat shoulder 22 is formed in the head of the joint body 1 to block the outer side of the valve seat 9, so that the valve seat 9 is clamped and fixed between the first valve seat shoulder 21 and the second valve seat shoulder 22.

[0038] Preferably, a sealing groove 23 is machined on the inner wall of the head of the connecting sleeve 6, and a sealing ring 24 is provided in the sealing groove 23 for sealing between the connecting sleeve 6 and the valve core sleeve 12. The sealing groove 23 is provided in the head of the connecting sleeve 6, that is, in one end close to the valve core sleeve, so that during the movement of the valve core sleeve 12, the sealing ring 24 can still seal between the valve core sleeve 12 and the connecting sleeve 6, thereby achieving a good sealing effect.

[0039] Preferably, a push shoulder 25 is machined on the outer wall of the head of the valve core sleeve 12, and the head of the movable sleeve 14 is contracted inward to form a push portion 26 located outside the push shoulder 25. A stop portion 27 is protruded outward from the tail of the movable sleeve 14, and a stop shoulder 28 is machined on the inner wall of the head of the joint sleeve 4 to the outside of the stop portion 27. The push shoulder 25 cooperates with the push portion 26 to make the push more stable, and the stop portion 27 cooperates with the stop shoulder 28 to prevent the movable sleeve 14 from falling out of the joint sleeve 4.

[0040] Preferably, the head of the joint sleeve 4 is machined with a plurality of through holes 29 evenly distributed along the circumferential direction. The locking mechanism includes a locking sleeve 30 and a plurality of steel balls 31. The steel balls 31 are installed in the through holes 29 one by one. The locking sleeve 30 is sleeved on the outside of the joint sleeve 4 and forces the steel balls 31 to be placed in the through holes 29. A third spring 32 is provided between the tail of the locking sleeve 30 and the joint sleeve 4. An avoidance groove 33 opposite to the steel balls 31 is provided in the head of the locking sleeve 30. During connection, the avoidance groove 33 of the locking sleeve 30 is opposite to the steel ball 21, the third spring 32 is compressed, and then the head of the other quick-change connector is inserted into the connector sleeve 4 and the movable sleeve 14 is pushed open until a circle of grooves on the head of the other quick-change connector is opposite to the steel ball 31. The locking sleeve 30 moves outward under the action of the third spring 32 and forces the steel ball 31 to be placed in the through hole 29 and stuck in the groove on the head of the other quick-change connector, thereby connecting the two quick-change connectors together.

[0041] Preferably, the head of the connector sleeve 4 is located on the outside of the through hole 29 and is machined with a second retaining ring groove 34, in which a second retaining ring 35 is installed. The second retaining ring 35 is used to prevent the locking sleeve 30 from falling off the connector sleeve 4. The head of the connector sleeve 4 is located on the inside of the through hole 29 and is machined with a spring shoulder 36, and one end of the third spring 35 rests on the spring shoulder 36.

[0042] Preferably, a sealing ring 24 is also provided between the connecting sleeve 6 and the joint body 1 to achieve a good sealing effect.

[0043] The connector sleeve, connecting sleeve, valve core sleeve and other components of the present invention are made of straight-through round tubes. When processing the connector sleeve, the straight-through round tube is first cut to a fixed length to form the connector sleeve. A limit shoulder can be machined inward from the tail of the connector sleeve, and then a second connecting thread can be machined on the inner wall of the tail. A spring shoulder, a second retaining ring groove and a through hole can be machined on the outside of the head. When processing the connecting sleeve, the straight-through round tube is first cut to a fixed length to form the connector sleeve. A first valve seat shoulder can be machined on the inner wall of the tail of the connector sleeve, a sealing groove and a spring groove can be machined on the inner wall of the head, and finally a third connecting thread can be machined on the outer wall of the connector sleeve. When processing the valve core sleeve, the straight-through round tube is first cut to a fixed length to form the valve core sleeve. A push shoulder can be machined on the head of the connector sleeve, and a first retaining ring groove can be machined on the inner side of the push shoulder. The connector sleeve, connecting sleeve, valve core sleeve and other components of the present invention are made of straight-through round tubes of appropriate diameters, which are small in size and have fewer processing parts, can save materials, and are convenient for automated mechanical processing, with a simple process and low cost. Moreover, only local mechanical processing is required, which produces less debris and does not cause the problem of chip removal difficulties. The concentricity of each component can also be guaranteed, which facilitates assembly and ensures stable product performance.

[0044] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and the embodiments. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A quick-change connector that is easy to process, characterized by: The invention comprises a hollow joint body, wherein the tail of the joint body is provided with a connecting portion for connection, and the inner wall of the head of the joint body is machined with a first connecting thread for connection; A joint sleeve, which is a straight-through round tube, has a second connecting thread machined on the inner wall of the tail of the joint sleeve for connection, and a locking mechanism for connection is provided on the head of the joint sleeve; A connecting sleeve, which is a straight round tube, and has a third connecting thread machined on its outer wall for connection. The head of the connector body is mounted on the outside of the tail of the connector sleeve, and the first connecting thread cooperates with the third connecting thread to connect the connector body to the connecting sleeve. The tail of the connector sleeve is mounted on the outside of the head of the connector sleeve, and the second connecting thread cooperates with the third connecting thread to connect the connector sleeve to the connecting sleeve. a valve core, which is inserted into the joint body, the joint sleeve, and the connecting sleeve; the tail of the valve core is fixed between the joint body and the connecting sleeve via a valve seat; the valve seat has a valve seat hole for fluid to pass through, and the head of the valve core serves as a sealing portion; a valve core sleeve, which is slidably disposed between the connecting sleeve and the valve core, and is a straight circular tube. A gap is left between the valve core sleeve and the valve core to form a fluid passage, and the outer wall of the tail of the valve core sleeve is in sliding and sealing contact with the inner wall of the connecting sleeve, and the head of the valve core sleeve can be sealed on the sealing portion of the valve core to close the fluid passage; A movable sleeve is slidably arranged between the valve core sleeve and the joint sleeve. The movable sleeve can push the valve core sleeve away from the sealing part of the valve core to open the fluid channel. A reset member is provided on the outside of the valve core sleeve, which can move the valve core sleeve and the movable sleeve away from the connecting sleeve.

2. The quick-change connector that is easy to process according to claim 1, characterized in that: A first retaining spring groove is machined on the outer wall of the valve core sleeve, and a first retaining spring is installed in the first retaining spring groove. A retaining ring is installed on the outer surface of the valve core sleeve, and the retaining ring is blocked on the inner side of the first retaining spring. The reset member includes a first spring and a second spring. The first spring is supported between the retaining ring and the connecting sleeve, and the second spring is supported between the retaining ring and the movable sleeve or the second spring is supported between the movable sleeve and the connecting sleeve.

3. The quick-change connector that is easy to process according to claim 2, characterized in that: A spring groove is machined on the end of the head portion of the connecting sleeve, and one end of the first spring is supported in the spring groove.

4. The easy-to-process quick-change connector according to any one of claims 1 to 3, characterized in that: The middle portion of the outer wall of the connecting sleeve is not provided with threads, so that the third connecting thread is divided into two sections, one section of the third connecting thread cooperates with the first connecting thread, and the other section of the third connecting thread cooperates with the second connecting thread.

5. The easy-to-process quick-change connector according to any one of claims 1 to 3, characterized in that: A first valve seat shaft shoulder is machined on the inner wall of the tail of the connecting sleeve and blocks the inner side of the valve seat, and a second valve seat shaft shoulder is formed in the head of the joint body and blocks the outer side of the valve seat.

6. The easy-to-process quick-change connector according to any one of claims 1 to 3, characterized in that: A sealing groove is machined on the inner wall of the head of the connecting sleeve, and a sealing ring is provided in the sealing groove to seal between the connecting sleeve and the valve core sleeve.

7. The easy-to-process quick-change connector according to any one of claims 1 to 3, characterized in that: A pushing shoulder is machined on the outer wall of the head of the valve core sleeve, the head of the movable sleeve shrinks inward to form a pushing portion located outside the pushing shoulder, the tail of the movable sleeve is provided with a limiting portion protruding outward, and a limiting shoulder is machined on the inner wall of the head of the joint sleeve and located outside the limiting portion.

8. The easy-to-process quick-change connector according to any one of claims 1 to 3, characterized in that: The head of the joint sleeve is machined with a plurality of through holes evenly distributed along the circumference. The locking mechanism includes a locking sleeve and a plurality of steel balls. The steel balls are installed in the through holes one by one. The locking sleeve is sleeved outside the joint sleeve and forces the steel balls to be placed in the through holes. A third spring is provided between the tail of the locking sleeve and the joint sleeve. An avoidance groove opposite to the steel balls is provided in the head of the locking sleeve.

9. The quick-change connector that is easy to process according to claim 8, characterized in that: The head of the joint sleeve is located on the outside of the through hole and is machined with a second retaining ring groove, in which a second retaining ring is installed. The second retaining ring is used to prevent the locking sleeve from falling off the joint sleeve. The head of the joint sleeve is located on the inside of the through hole and is machined with a spring shoulder, and one end of the third spring rests on the spring shoulder.

10. The easy-to-process quick-change connector according to any one of claims 1 to 3, characterized in that: A sealing ring is provided between the connecting sleeve and the joint body.

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