Air tightness test joint for liquid cooling plate

Abstract

The invention discloses a liquid cooling plate air tightness test connector which comprises a connector body, an air pipe connecting piece is arranged at one end of the connector body, a sealing piece is arranged on the air pipe connecting piece, an adjusting sleeve is rotationally arranged in the connector body, and a plurality of spiral openings distributed in the circumferential direction of the adjusting sleeve are formed in the adjusting sleeve. A plurality of guide strips are axially arranged on the connector body, positioning rods capable of penetrating into the spiral opening in a radial moving mode are inserted into gaps of the guide strips, a cylindrical elastic sleeve is arranged in the adjusting sleeve, the positioning rods penetrate through and are fixed to the elastic sleeve, a movable sleeve is movably arranged outside the connector body in a sleeving mode, and a plurality of protruding strips are arranged on the inner wall of the movable sleeve. An elastic piece is arranged between the movable sleeve and the connector body, a limiting ring is arranged on the connector body, and a guide face is arranged at the matched end of the protruding strip and the positioning rod. The liquid cooling plate air tightness test joint can be suitable for positioning of various liquid cooling plate interface pipes with different axial positions of the positioning grooves, so that the detection cost is reduced, and the test efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of liquid-cooled plate testing equipment, specifically a liquid-cooled plate airtightness testing connector. Background Technology

[0002] As a key heat dissipation component in high heat flux density equipment such as power batteries for new energy vehicles and data center servers, the sealing of the internal flow channels of liquid cooling plates directly affects the safety and stability of equipment operation. To ensure that there is no risk of coolant leakage during long-term operation, the liquid cooling plates must undergo rigorous airtightness testing before leaving the factory.

[0003] Currently, quick-connect test connectors are typically used to connect liquid cooling plates to their interfaces during airtightness testing. Existing airtightness test connectors mainly consist of a connector body, a sealing ring, and a drive handle. Their working principle is as follows: the connector body is inserted into the interface tube of the liquid cooling plate. By operating the drive handle, the sleeve inside the connector body moves axially, compressing the sealing ring and causing it to expand radially, thus tightly adhering to the inner wall or end face of the interface tube, achieving a sealed connection.

[0004] However, existing test connectors have the following technical limitations in application: 1. Poor adaptability and low compatibility: Existing airtightness test connectors typically adopt an integrated structure design, with fixed outer diameter of the connector body, specifications of the sealing ring, and the mating position of the positioning groove on the liquid cooling plate interface tube. However, in actual production, different models of liquid cooling plates have significant differences in the pipe diameter, wall thickness, and axial position of the external positioning groove to meet different assembly space and flow requirements.

[0005] 2. High changeover costs and low testing efficiency: Because existing connectors are not compatible with multiple specifications, when different models of liquid cooling plates need to be switched for testing on the production line, operators must stop the machine to replace them with matching dedicated test connectors. This not only increases the procurement and inventory costs of connectors, but also consumes a lot of production time due to frequent disassembly and debugging, seriously affecting the cycle time of airtightness testing and overall production efficiency.

[0006] 3. Limited Positioning Accuracy: For test connectors that rely on snapping into the positioning groove of the interface tube for axial fixation, when the position of the positioning groove shifts due to product design changes, existing fixed-size connectors often cannot accurately engage. Forcibly tightening the seal can easily lead to connector slippage or uneven wear of the sealing ring, resulting in inaccurate test results or damage to the liquid cooling plate interface. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a liquid-cooled plate airtightness test connector. This universal liquid-cooled plate airtightness test connector can flexibly adapt to different pipe diameters and different positioning groove positions, thereby reducing testing costs and improving testing efficiency.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a liquid-cooled plate airtightness test connector, comprising a connector body, a gas pipe connector at one end of the connector body, a sealing element at the end of the gas pipe connector located inside the connector body, an adjusting sleeve rotatably disposed inside the connector body, a plurality of spiral openings distributed along the circumference of the adjusting sleeve on the adjusting sleeve, a plurality of guide strips axially disposed on the connector body, a positioning rod that can move radially through the spiral openings is inserted into the gaps of the guide strips, and a cylindrical elastic sleeve is disposed inside the adjusting sleeve. The rod passes through and is fixed to the elastic sleeve. The connector body is movably fitted with a movable sleeve. The inner wall of the movable sleeve is provided with several protrusions. The gaps between the protrusions and the adjacent guide strips are matched with the position of the positioning rod. An elastic element is provided between one end of the movable sleeve and the connector body. A limit ring is provided on the connector body at the other end of the movable sleeve. The elastic force of the elastic element pushes the movable sleeve so that the positioning rod is radially pushed inward into the connector body by the protrusions to be inserted into the positioning groove of the liquid cooling plate interface tube. The mating end of the protrusion and the positioning rod is provided with a guide surface. When using this liquid-cooled plate airtightness test connector, first move the movable sleeve towards the elastic element, causing the positioning rod to move radially outward under the action of the elastic sleeve. Then, insert the liquid-cooled plate interface tube from the center of the adjusting sleeve until it is tightly pressed against the sealing element. After that, release the movable sleeve, and the movable sleeve will return to its original position under the elastic force of the elastic element. The guide surface of the convex strip will press the positioning rod radially inward into the positioning groove of the liquid-cooled plate interface tube to position the liquid-cooled plate interface tube. The axial position of the positioning rod can be adjusted by rotating the adjusting sleeve. This allows the liquid-cooled plate airtightness test connector to be used for positioning liquid-cooled plate interface tubes with different axial positions of various positioning grooves, eliminating the need to replace the liquid-cooled plate airtightness test connector, thereby reducing testing costs and improving testing efficiency.

[0009] In the above technical solution, preferably, the spiral opening intersects with the gaps of at least two guide strips, and at least two positioning rods of unequal lengths are inserted into each spiral opening. Positioning rods of the same length within each spiral opening are located on the same circular surface. A small-diameter portion is provided between the guide strip and the support portion of the elastic element, allowing the protrusion to fully enter and rotate. After the movable sleeve compresses the elastic element until the protrusion fully enters the small-diameter portion, the movable sleeve is rotated to switch the positioning rod aligned with the protrusion. This structure allows the movable sleeve to be rotated so that the protrusion fully enters the small-diameter portion, thereby changing the gap between the guide strip aligned with the protrusion and the positioning rod aligned with it. Because different length positioning rods are provided, the inner ends of the positioning rods of different lengths are positioned differently when radially pressed into the connector body by the protrusion. This allows for the positioning of liquid-cooled plate interface pipes of different diameters or different positioning groove depths, eliminating the need to replace the liquid-cooled plate airtightness test connector, thus reducing testing costs and improving testing efficiency.

[0010] In the above technical solution, preferably, a positioning component is provided between the adjusting sleeve and the connector body. This structure allows for positioning of the adjusting sleeve and connector body after the adjusting sleeve has completed its adjustment, preventing accidental rotation.

[0011] In the above technical solution, preferably, the positioning component includes a plurality of slots disposed at the end of the connector body, an extension disposed on the adjusting sleeve, and a plug movably passing through the extension. The plug is inserted into any of the slots to position the connector body and the adjusting sleeve. This structure allows for quick positioning of the adjusting sleeve and connector body by removing the plug from the slot and then reinserting it after switching.

[0012] In the above technical solution, preferably, the guide surface is an arc-shaped surface. This structure makes the fit between the positioning rod and the protrusion smoother.

[0013] In the above technical solution, preferably, the outer end of the positioning rod is a hemispherical surface. This structure makes the fit between the positioning rod and the protrusion smoother.

[0014] In the above technical solution, preferably, the air pipe connector is threadedly connected to the connector body. This structure allows for adjustment of the sealing element's position by the relative rotation of the air pipe connector and the connector body, enabling fine-tuning and adaptation of liquid cooling plate interface pipes with poor machining accuracy.

[0015] In the above technical solution, preferably, the connector body includes an air pipe connecting disc and a guide cylinder portion, which are joined together to form an annular groove. The adjusting sleeve is provided with an annular protrusion that rotates within the annular groove. This structure facilitates the rotational engagement between the adjusting sleeve and the connector body, and also facilitates the assembly of the elastic element.

[0016] In the above technical solution, preferably, the air pipe connecting plate and the guide cylinder are fixed by bolts.

[0017] Compared with the prior art, the present invention has the following advantages: When using this liquid-cooled plate airtightness test connector, the movable sleeve is first moved towards the elastic element side, so that the positioning rod moves radially outward under the action of the elastic sleeve. Then, the liquid-cooled plate interface tube is inserted from the center of the adjusting sleeve until it is pressed against the sealing element. After that, the movable sleeve is released, and the movable sleeve returns to its original position under the elastic force of the elastic element. The guide surface of the convex strip presses the positioning rod radially inward into the positioning groove of the liquid-cooled plate interface tube to position the liquid-cooled plate interface tube. The axial position of the positioning rod can be adjusted by rotating the adjusting sleeve, so that the liquid-cooled plate airtightness test connector can be used to position liquid-cooled plate interface tubes with different axial positions of various positioning grooves. There is no need to replace the liquid-cooled plate airtightness test connector, thereby reducing the testing cost and improving the testing efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of the present invention with the movable sleeve removed.

[0020] Figure 3 This is an exploded structural diagram of an embodiment of the present invention.

[0021] Figure 4 This is a cross-sectional schematic diagram of an embodiment of the present invention.

[0022] Figure 5 This is a cross-sectional view of an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the structure of the movable sleeve in an embodiment of the present invention. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: See below Figures 1 to 6A liquid-cooled plate airtightness test connector includes a connector body 1, with a gas pipe connector 2 at one end of the connector body 1 and a sealing element 3 at the end of the gas pipe connector 2 located inside the connector body 1. An adjusting sleeve 4 is rotatably disposed inside the connector body 1, and the adjusting sleeve 4 has a plurality of spiral openings 5 ​​distributed along the circumference of the adjusting sleeve 4. In this embodiment, there are three spiral openings 5, which are evenly distributed along the circumference of the adjusting sleeve 4. A plurality of guide strips 6 are axially disposed on the connector body 1, and a positioning rod 7 that can move radially and pass through the spiral openings 5 ​​is inserted into the gaps between the guide strips 6. A cylindrical elastic sleeve 8 is disposed inside the adjusting sleeve 4, and the positioning rod 7 passes through and is fixed to the elastic sleeve. On the 8th, a movable sleeve 9 is movably fitted on the outside of the connector body 1. The inner wall of the movable sleeve 9 is provided with three evenly spaced protrusions 10. The gap between the protrusions 10 and the adjacent guide strips 6 is matched, and the position is matched with the positioning rod 7. An elastic element 11 is provided between one end of the movable sleeve 9 and the connector body 1. In this embodiment, the elastic element 11 is a spring sleeved on the connector body 1. A limit ring 12 is provided on the connector body 1 at the other end of the movable sleeve 9. The elastic force of the elastic element 11 pushes the movable sleeve 9 so that the protrusions 10 push the positioning rod 7 radially inward into the connector body 1 to insert into the positioning groove of the liquid cooling plate interface tube. A guide surface 13 is provided at the mating end of the protrusions 10 and the positioning rod 7. When using this liquid-cooled plate airtightness test connector, firstly, the movable sleeve 9 is moved towards the elastic element 11, so that the positioning rod 7 moves radially outward under the action of the elastic sleeve 8. Then, the liquid-cooled plate interface tube is inserted from the center of the adjusting sleeve 4 until it is pressed against the sealing element 3. After that, the movable sleeve 9 is released, and the movable sleeve 9 returns to its original position under the elastic force of the elastic element 11. The guide surface 13 of the protrusion 10 presses the positioning rod 7 radially inward into the positioning groove of the liquid-cooled plate interface tube to position the liquid-cooled plate interface tube. In this embodiment, the three protrusions 10 can press three positioning rods 7 inward to position the liquid-cooled plate interface tube. The axial position of the positioning rod 7 can be adjusted by rotating the adjusting sleeve 4, so that the liquid-cooled plate airtightness test connector can be used for positioning liquid-cooled plate interface tubes with different axial positions of various positioning grooves. There is no need to replace the liquid-cooled plate airtightness test connector, thereby reducing the testing cost and improving the testing efficiency.

[0025] The spiral opening 5 intersects with the gaps of at least two guide bars 6. At least two positioning rods 7 of unequal lengths are inserted in each spiral opening 5. In this embodiment, the spiral opening 5 intersects with the gaps of four guide bars 6. Four positioning rods 7 of unequal lengths are inserted in each spiral opening 5. The positioning rods 7 in each spiral opening 5 are of equal length to the positioning rods 7 in the same circular plane in the other two spiral openings 5. That is, the positioning rods 7 of the same length in each spiral opening 5 are located in the same circular plane. The positioning rods 7 located in the same circular plane form a group. The protrusion 10 presses a group of positioning rods 7 radially in each time. The remaining positioning rods 7 are not affected by the pressure of the protrusion 10 and remain almost stationary under the elastic force of the elastic sleeve 8. There is a small diameter portion 14 between the guide bar 6 and the support portion of the elastic member 11 for the protrusion 10 to fully enter and rotate. After the movable sleeve 9 compresses the elastic member 11 until the protrusion 10 fully enters the small diameter portion 14, the movable sleeve 9 is rotated to switch the positioning rods 7 aligned with the protrusion 10. This structure allows the convex strip 10 to fully enter the small-diameter portion 14 by moving the movable sleeve 9. The rotatable sleeve 9 changes the gap between the guide strip 6 aligned with the convex strip 10 and the positioning rod 7 aligned with it. Because it is equipped with positioning rods 7 of different lengths, the inner end of each positioning rod 7 is positioned differently when radially pressed into the connector body 1 by the convex strip 10. This allows for the positioning of liquid-cooled plate interface pipes of different diameters or different positioning groove depths. In this embodiment, there are four sets of positioning rods 7 of different lengths. The rotation of the movable sleeve 9 allows each set of positioning rods 7 to operate independently, adapting to four different diameters or positioning groove depths of liquid-cooled plate interface pipes. This eliminates the need to replace the liquid-cooled plate airtightness test connector, thereby reducing testing costs and improving testing efficiency. Of course, in other embodiments, the positioning rods 7 can have even more lengths.

[0026] In order to position the adjusting sleeve 4 and the connector body 1 after the adjusting sleeve 4 has been adjusted and to prevent accidental rotation, a positioning component is provided between the adjusting sleeve 4 and the connector body 1.

[0027] In this embodiment, the positioning component includes a plurality of slots 15 disposed at the end of the connector body 1, and an extension 16 disposed on the adjusting sleeve 4. An insert 17 is movably inserted through the extension 16, and the insert 17 is inserted into any slot 15 to position the connector body 1 and the adjusting sleeve 4. This structure allows for quick positioning of the adjusting sleeve 4 and the connector body 1 by removing the insert 17 from the slot 15 and then reinserting it after switching.

[0028] Of course, in other embodiments, any positioning component in the prior art can be used to position the adjusting sleeve 4 and the connector body 1, for example, by bolt positioning.

[0029] In this embodiment, the guide surface 13 is an arc-shaped surface. This structure makes the fit between the positioning rod 7 and the protrusion 10 smoother.

[0030] In this embodiment, the outer end of the positioning rod 7 is a hemispherical surface. This structure makes the fit between the positioning rod 7 and the protrusion 10 smoother.

[0031] The air pipe connector 2 is threadedly connected to the connector body 1. This structure allows for adjustment of the position of the sealing element 3 by rotating the air pipe connector 2 relative to the connector body 1, enabling fine-tuning and adaptation of liquid cooling plate interface pipes with poor machining accuracy.

[0032] In this embodiment, the connector body 1 includes an air pipe connecting plate 18 and a guide cylinder part 19. The air pipe connecting plate 18 and the guide cylinder part 19 are joined together to form an annular groove 20. The adjusting sleeve 4 is provided with an annular protrusion 21 that rotates and engages within the annular groove 20. This structure facilitates the rotational engagement between the adjusting sleeve 4 and the connector body 1, and also facilitates the assembly of the elastic element 11.

[0033] In this embodiment, the air pipe connecting plate 18 and the guide cylinder part 19 are fixed by bolts.

[0034] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A liquid-cooled plate airtightness test connector, comprising a connector body (1), wherein one end of the connector body (1) is provided with an air pipe connector (2), characterized in that: The tracheal connector (2) has a sealing element (3) at one end inside the connector body (1). An adjusting sleeve (4) is rotatably arranged inside the connector body (1). Several spiral openings (5) are arranged on the adjusting sleeve (4) along the circumferential direction of the adjusting sleeve (4). Several guide strips (6) are axially arranged on the connector body (1). A positioning rod (7) that can move radially through the spiral opening (5) is inserted into the gap of the guide strips (6). A cylindrical elastic sleeve (8) is arranged inside the adjusting sleeve (4). The positioning rod (7) passes through and is fixed on the elastic sleeve (8). A movable sleeve (9) is movably fitted on the outside of the connector body (1). (9) The inner wall is provided with a plurality of protrusions (10), the gaps of the plurality of protrusions (10) and the adjacent guide strips (6) are matched, and the position of the positioning rod (7) is matched. An elastic element (11) is provided between one end of the movable sleeve (9) and the connector body (1). A limit ring (12) is provided on the connector body (1) at the other end of the movable sleeve (9). The elastic force of the elastic element (11) pushes the movable sleeve (9) so that the positioning rod (7) is radially pushed inward by the protrusions (10) into the connector body (1) to be inserted into the positioning groove of the liquid cooling plate interface pipe. A guide surface (13) is provided at the mating end of the protrusions (10) and the positioning rod (7).

2. The liquid-cooled plate airtightness test connector as described in claim 1, characterized in that: The spiral opening (5) intersects with the gaps of at least two guide bars (6). At least two positioning rods (7) of different lengths are inserted in each spiral opening (5). Positioning rods (7) of the same length in each spiral opening (5) are located in the same circular surface. There is a small diameter portion (14) between the guide bar (6) and the support portion of the elastic member (11) for the protrusion (10) to fully enter and rotate. After the movable sleeve (9) compresses the elastic member (11) until the protrusion (10) fully enters the small diameter portion (14), the movable sleeve (9) is rotated to switch the positioning rod (7) aligned with the protrusion (10).

3. The liquid-cooled plate airtightness test connector as described in claim 1, characterized in that: A positioning component is provided between the adjusting sleeve (4) and the connector body (1).

4. The liquid-cooled plate airtightness test connector as described in claim 3, characterized in that: The positioning component includes a plurality of slots (15) disposed at the end of the connector body (1) and an extension (16) disposed on the adjusting sleeve (4). The extension (16) is movably provided with a plug (17), which is inserted into any of the slots (15) to position the connector body (1) and the adjusting sleeve (4).

5. The liquid-cooled plate airtightness test connector as described in claim 1, characterized in that: The guide surface (13) is an arc-shaped surface.

6. The liquid-cooled plate airtightness test connector as described in claim 1, characterized in that: The outer end of the positioning rod (7) is a hemispherical surface.

7. The liquid-cooled plate airtightness test connector as described in claim 1, characterized in that: The tracheal connector (2) is threadedly connected to the connector body (1).

8. The liquid-cooled plate airtightness test connector as described in claim 1, characterized in that: The connector body (1) includes a tracheal connecting plate (18) and a guide cylinder part (19). The tracheal connecting plate (18) and the guide cylinder part (19) are joined together to form an annular groove (20). The adjusting sleeve (4) is provided with an annular protrusion (21) that rotates and engages within the annular groove (20).

9. The liquid-cooled plate airtightness test connector as described in claim 1, characterized in that: The air pipe connecting plate (18) is fixed to the guide cylinder part (19) by bolts.

Images