Quick-change connector

Abstract

The utility model discloses a quick-change connector which comprises a sleeve, a first clamping part and a second clamping part. The connecting pipe is provided with a second clamping part, and the connecting pipe can move in the sleeve in the axial direction so that the first clamping part and the second clamping part can be locked; the valve assembly is arranged in the sleeve; one end of the transmission part is connected to a valve element or a valve seat of the valve assembly, and at least part of the end, deviating from the valve element or the valve seat, of the transmission part is located on the moving path of the connecting pipe; the valve assembly is arranged to move into the sleeve along with the connecting pipe, a valve element or a valve seat of the valve assembly is pushed by the transmission piece, and the two sides of the valve assembly are communicated. When the quick-change connector is used, the connecting pipe is inserted into the sleeve, along with movement of the connecting pipe in the sleeve, the valve assembly is pushed by the connecting pipe to be opened, the sleeve is closed, the buckle on the connecting pipe is locked in the clamping groove of the sleeve, connection of the connecting pipe and the sleeve is achieved, the sleeve is kept closed, the quick-change connector is connected through the buckle, and connection and disconnection operation of the connector is simplified.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic equipment testing technology, specifically a quick-change coupling. Background Technology

[0002] With the continuous improvement of industrial automation and intelligence, hydraulic systems are increasingly widely used in various industries. The performance of hydraulic systems directly affects the operating efficiency and stability of equipment, thus placing higher demands on the testing and diagnosis of hydraulic systems. Quick-connect couplings for hydraulic systems are key components used in hydraulic system testing and diagnosis, enabling rapid connection to testing equipment for system performance testing and troubleshooting. Quick-connect couplings need to possess characteristics such as rapid connection and disconnection, good sealing performance, and strong pressure resistance to meet the needs of hydraulic system testing. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, this utility model provides a quick-connect coupling that uses a snap-fit ​​connection, simplifying the connection and disconnection operations.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a quick-connect coupling, comprising:

[0005] A sleeve, wherein a first snap-fit ​​portion is provided inside the sleeve;

[0006] A connecting pipe is provided with a second snap-fit ​​portion, and the connecting pipe can move axially within the sleeve to lock the first snap-fit ​​portion and the second snap-fit ​​portion together.

[0007] A valve assembly disposed within the sleeve;

[0008] A transmission component, one end of which is connected to the valve core or valve seat of the valve assembly, and at least part of the end of the transmission component facing away from the valve core or valve seat is located on the movement path of the connecting pipe;

[0009] The valve assembly is configured such that, as the connecting pipe moves into the sleeve, the valve core or valve seat of the valve assembly is pushed by the transmission member, thereby connecting the two sides of the valve assembly.

[0010] With the above solution, when connecting the connecting pipe and the sleeve, the connecting pipe is inserted into the sleeve. As the connecting pipe moves inside the sleeve, the valve seat or valve core of the valve assembly is pushed open by the connecting pipe, opening the sleeve passage. The first and second snap-fit ​​parts are then locked, thus connecting the connecting pipe and the sleeve and maintaining the sleeve passage. This quick-connect coupling uses a snap-fit ​​connection, simplifying the connection and disconnection operations.

[0011] Furthermore, the first snap-fit ​​portion includes a slot, and the second snap-fit ​​portion includes a buckle. At least two buckles are provided at the end of the connecting tube inserted into the sleeve, and the buckles protrude radially outward along the connecting tube. The at least two buckles can be symmetrically distributed along the circumference of the connecting tube to ensure a stable connection between the connecting tube and the sleeve.

[0012] Furthermore, the inner wall of the sleeve is provided with a groove, which extends along the axial direction of the sleeve;

[0013] The slot is provided along the circumferential direction of the sleeve, and the slot and the groove intersect.

[0014] The buckle of the connecting tube can move along the groove into the slot.

[0015] With the above technical solution, when connecting the connecting pipe and the sleeve, the buckle of the connecting pipe moves along the groove, which can prevent the buckle of the connecting pipe from rubbing against the inner wall of the sleeve. The buckle moves along the groove into the slot, and the connecting pipe is rotated to lock the buckle in the slot, thus connecting and fixing the connecting pipe and the sleeve.

[0016] Furthermore, the sleeve has a first end and a second end, and the connecting tube is inserted into the sleeve from the first end;

[0017] The inner side of the sleeve is provided with a first sealing part and a first connecting part in sequence from the first end inward. The inner diameter of the first sealing part is larger than that of the first connecting part. The groove and the slot are provided in the first connecting part.

[0018] The connecting pipe is provided with a second sealing part that can be interference-fitted with the first sealing part, and a second connecting part that can be connected and fixed with the first connecting part, and the buckle is provided on the second connecting part.

[0019] When the first connecting part and the second connecting part are locked, the first sealing part and the second sealing part are interference fit, and under the action of the sealing ring, the connection tube and the sleeve are sealed.

[0020] Furthermore, the outer diameter of the second connecting part is less than or equal to the inner diameter of the first connecting part, the outer diameter of the second sealing part is greater than or equal to the inner diameter of the first connecting part, and the outer diameter of the second sealing part is less than or equal to the inner diameter of the first sealing part.

[0021] With the above technical solution, during the process of inserting the connecting tube into the sleeve, the buckle will not rub against the inner wall of the sleeve, and at the same time, the first connecting part can restrict the movement of the second sealing part, thus playing an auxiliary positioning role.

[0022] Furthermore, the valve assembly includes:

[0023] Valve core, which is fixed inside the sleeve;

[0024] A valve seat is provided on the side of the valve core away from the connecting pipe, and the valve seat is provided with a through hole;

[0025] An elastic element is provided, one end of which is fixedly connected to the sleeve, and the other end of which is connected to the valve seat. Under the action of the elastic element, the valve core abuts against the through hole of the valve seat, thereby closing the valve assembly.

[0026] When the connecting pipe and sleeve are not connected, the valve seat abuts against the valve core under the action of the elastic element to ensure that the valve assembly is closed.

[0027] Furthermore, the valve seat is connected to the transmission component on the side facing the valve core.

[0028] When connecting the connecting pipe and the sleeve, as the connecting pipe moves, the transmission component is pushed by the connecting pipe, causing the valve seat to overcome the spring force and move away from the valve core, thereby connecting the two sides of the valve assembly.

[0029] Furthermore, the inner wall of the sleeve is provided with an installation groove, and an installation plate is provided in the installation groove, with the valve core fixed on the installation plate.

[0030] Furthermore, a sealing ring is provided on the outside of the connecting pipe, and a sealing ring is sleeved on the outside of the valve assembly.

[0031] Based on the above technical solution, the beneficial effects of this utility model are as follows:

[0032] The quick-connector disclosed in this application allows the connecting pipe to be inserted into the sleeve during connection. As the connecting pipe moves within the sleeve, the valve assembly is pushed open by the connecting pipe, opening the sleeve passage. The buckle on the connecting pipe is then locked into the slot of the sleeve, thus connecting the connecting pipe and the sleeve and maintaining the sleeve passage. This quick-connector uses a buckle connection, simplifying the connection and disconnection operations.

[0033] To make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a cross-sectional view of the quick-change connector in an embodiment of this utility model;

[0036] Figure 2 This is a schematic diagram of the sleeve structure in an embodiment of this utility model;

[0037] Figure 3 This is a schematic diagram of the connecting pipe in an embodiment of this utility model;

[0038] Figure 4 This is a schematic diagram of the valve core structure in an embodiment of this utility model;

[0039] Figure 5 This is a schematic diagram of the valve seat in an embodiment of this utility model.

[0040] The reference numerals in the above figures are as follows: 1. Sleeve; 11. First sealing part; 111. Groove; 112. Slot; 12. First connecting part; 13. Mounting groove; 2. Connecting pipe; 21. Second sealing part; 22. Second connecting part; 221. Snap fastener; 31. Valve core; 32. Valve seat; 321. Through hole; 322. Transmission rod; 33. Elastic element; 34. Mounting plate; 35. Retaining ring. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0042] It should be noted that in the description of this utility model, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0043] Example: This example discloses a quick-connect coupling, comprising:

[0044] The sleeve 1 has a first end for connecting to the connecting pipe 2 and a second end for connecting to the testing equipment. From the first end inwards, the sleeve 1 is provided with a first sealing part 11 and a first connecting part 12.

[0045] In some feasible embodiments, the inner diameter of the first sealing portion 11 is larger than the inner diameter of the first connecting portion 12.

[0046] The first sealing part 11 is provided with a groove 111 and a slot 112, the groove 111 extending along the axial direction of the sleeve 1. The slot 112 extends along the circumferential direction of the sleeve 1, and the groove 111 and the slot 112 intersect.

[0047] The connecting pipe 2 is provided with a second sealing part 21 that can be interference-fitted with the first sealing part 11, and a second connecting part 22 that can be connected and fixed to the first connecting part 12. When the first connecting part 12 and the second connecting part 22 are locked, the first sealing part 11 and the second sealing part 21 are interference-fitted. A sealing ring is sleeved on the outer side of the second sealing part 21, and the sealing ring ensures a seal between the connecting pipe 2 and the sleeve 1.

[0048] In some feasible embodiments, the outer diameter of the second connecting portion 22 is equal to the inner diameter of the first connecting portion 12, the outer diameter of the second sealing portion 21 is greater than the inner diameter of the first connecting portion 12, and the outer diameter of the second sealing portion 21 is equal to the inner diameter of the first sealing portion 11.

[0049] The second connecting part 22 is provided with a buckle 221 on the side opposite to the second sealing part 21, and the buckle 221 protrudes outward along the radial direction of the connecting pipe 2.

[0050] In some feasible embodiments, the second connecting portion 22 is provided with two latches 221 on the side opposite to the second sealing portion 21, and the two latches 221 are symmetrically distributed in the circumferential direction of the connecting tube 2. Correspondingly, the sleeve 1 is provided with two grooves 111 and slots 112.

[0051] When connecting the connecting tube 2 and the sleeve 1, the second connecting part 22 of the connecting tube 2 is inserted into the first end of the sleeve 1, so that the two latches 221 are respectively located in the two grooves 111. As the connecting tube 2 moves toward the sleeve 1, the latches 221 move along the grooves 111 into the slots 112. Rotating the connecting tube 2 causes the latches 221 to leave the grooves 111 and fully enter the slots 112, thereby preventing the latches 221 from detaching from the sleeve 1 along the grooves 111, and the connection is completed.

[0052] In some feasible embodiments, the buckle is disposed inside the sleeve 1, and the slot and groove are disposed on the outer surface of the connecting pipe 2.

[0053] A valve assembly is also provided inside the sleeve 1. The valve assembly is located on the side of the first connecting part 112 opposite to the first connecting part 111, and the valve assembly is located on the moving path of the connecting pipe 2. The valve assembly is configured such that as the connecting pipe 2 moves into the sleeve 1, the valve assembly is pushed by the connecting pipe 2, thereby connecting the two sides of the valve assembly.

[0054] The valve assembly includes a valve core 31 disposed within a sleeve 1, a valve seat 32 that cooperates with the valve core 31 to block the sleeve 1, the valve seat 32 being disposed on the side of the valve core 31 away from the first connecting portion 12, the valve seat 32 being provided with a through hole 321 that cooperates with the valve core 31, and an elastic member 33 that abuts the valve core 31 and the through hole 321 of the valve seat 32.

[0055] In some feasible embodiments, the inner wall of the sleeve 1 is provided with an annular mounting groove 13, and a mounting plate 34 is provided in the mounting groove 13. At least two opposite ends of the mounting plate 34 are inserted into the mounting groove 13. A retaining ring 35 is also provided in the mounting groove 13 to lock the mounting plate 34. A connecting hole is provided on the mounting plate 34 relative to the axis of the sleeve 1. The valve core 31 is wedge-shaped, and a threaded hole is provided at the bottom of the valve core 31. By passing a screw through the connecting hole and the threaded hole, the valve core 31 can be fixed on the mounting plate 34.

[0056] The outer diameter of the valve seat 32 is equal to the inner diameter of the sleeve 1, and a sealing ring is fitted on the outer side of the valve seat 32. The through hole of the valve seat 32 is configured to fit the wedge shape of the valve core 31.

[0057] The elastic element 33 includes a spring, one end of which is fixed to the inner wall of the sleeve 1, and the other end of which is connected and fixed to the valve seat 32. When no external force is applied, under the action of the spring, the valve core 31 always remains abutted against the through hole of the valve seat 32, thereby achieving the purpose of closing the valve assembly.

[0058] In some feasible embodiments, the valve core 31 may be spherical, and correspondingly, the through hole 321 on the valve seat 32 is frustum-shaped.

[0059] A transmission component is provided on the side of the valve seat 32 facing the valve core 31.

[0060] In some feasible embodiments, the transmission element includes a transmission rod 322 extending perpendicular to the valve seat 32 and toward a first end of the sleeve 1. The transmission rod 322 extends into the movement path of the connecting pipe 2.

[0061] When connecting the connecting pipe 2 and the sleeve 1, as the connecting pipe 2 moves, the transmission rod 322 is pushed by the connecting pipe 2, causing the valve seat 32 to overcome the spring force and move away from the valve core 31, thereby connecting the two sides of the valve assembly. Until the latch 221 moves along the groove 111 into the slot 112, the connecting pipe 2 is rotated, causing the latch 221 to leave the groove 111 and fully enter the slot 112. Under the action of the spring, the connecting pipe 2 is subjected to pressure from the valve seat 32 towards the first end of the sleeve 1, thereby causing the latch 221 to abut against the slot 112.

[0062] When disconnection is required, rotate the connecting tube 2 again so that the buckle 221 rotates from the slot 112 back into the groove 111, and the connecting tube 2 can be removed. The spring pushes the valve seat 32 to move toward the valve core 31, so that the wedge-shaped through hole 321 of the valve seat 32 fits with the valve core 31 to cut off the flow.

[0063] This utility model uses specific embodiments to illustrate the principle and implementation of the utility model. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the utility model. Therefore, the content of this specification should not be construed as a limitation of the utility model.

Claims

1. A quick-connect coupling, characterized in that, include: A sleeve, wherein a first snap-fit ​​portion is provided inside the sleeve; A connecting pipe is provided with a second snap-fit ​​portion, and the connecting pipe can move axially within the sleeve to lock the first snap-fit ​​portion and the second snap-fit ​​portion together. A valve assembly disposed within the sleeve; A transmission component, one end of which is connected to the valve core or valve seat of the valve assembly, and at least part of the end of the transmission component facing away from the valve core or valve seat is located on the movement path of the connecting pipe; The valve assembly is configured such that, as the connecting pipe moves into the sleeve, the valve core or valve seat of the valve assembly is pushed by the transmission member, thereby connecting the two sides of the valve assembly.

2. The quick-connect coupling as described in claim 1, characterized in that, The first snap-fit ​​part includes a snap-fit ​​groove, the second snap-fit ​​part includes a snap-fit ​​buckle, and at least two snap-fit ​​buckles are provided at one end of the connecting tube that is inserted into the sleeve, and the snap-fit ​​buckles protrude outward along the radial direction of the connecting tube.

3. The quick-connect coupling as described in claim 2, characterized in that, The inner wall of the sleeve is provided with a groove, which extends along the axial direction of the sleeve; The slot is provided along the circumferential direction of the sleeve, and the slot and the groove intersect. The buckle of the connecting tube can move along the groove into the slot.

4. The quick-connect coupling as described in claim 3, characterized in that, The sleeve has a first end and a second end, and the connecting tube is inserted into the sleeve from the first end; The inner side of the sleeve is provided with a first sealing part and a first connecting part in sequence from the first end inward. The inner diameter of the first sealing part is larger than that of the first connecting part. The groove and the slot are provided in the first connecting part. The connecting pipe is provided with a second sealing part that can be interference-fitted with the first sealing part, and a second connecting part that can be connected and fixed with the first connecting part, and the buckle is provided on the second connecting part.

5. The quick-connect coupling as described in claim 4, characterized in that, The outer diameter of the second connecting part is less than or equal to the inner diameter of the first connecting part, the outer diameter of the second sealing part is greater than or equal to the inner diameter of the first connecting part, and the outer diameter of the second sealing part is less than or equal to the inner diameter of the first sealing part.

6. The quick-connect coupling as described in claim 1, characterized in that, The valve assembly includes: Valve core, which is fixed inside the sleeve; A valve seat is provided on the side of the valve core away from the connecting pipe, and the valve seat is provided with a through hole; An elastic element is provided, one end of which is fixedly connected to the sleeve, and the other end of which is connected to the valve seat. Under the action of the elastic element, the valve core abuts against the through hole of the valve seat, thereby closing the valve assembly.

7. The quick-connect coupling as described in claim 6, characterized in that, The valve seat is connected to the transmission component on the side facing the valve core.

8. The quick-connect coupling as described in claim 6, characterized in that, The inner wall of the sleeve is provided with an installation groove, and an installation plate is provided in the installation groove. The valve core is fixed on the installation plate.

9. The quick-connect coupling as described in claim 1, characterized in that, A sealing ring is provided on the outside of the connecting pipe, and a sealing ring is sleeved on the outside of the valve assembly.

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