A heat exchanger seal detection connection device

Abstract

The purpose of this utility model is to solve the technical problems of existing sealing joints, such as inconvenient installation, easy wear, and thus affecting the sealing performance and resulting in low testing efficiency. It provides a heat exchanger sealing test connection device, including a quick-connect fitting, a connecting plate, a sealing element, and a first and second retaining ring disposed on the outer surface of the inlet and outlet water pipes of the heat exchanger to be tested. The first and second retaining rings are connected by a spiral buckle to ensure clamping of the inlet and outlet water pipes. Double-ended studs connect both ends of the connecting plate to the ends of the first and second retaining rings respectively. A clamping nut is used to press the connecting plate, ensuring a tight fit between the sealing element at the bottom center of the connecting plate and the ports of the inlet and outlet water pipes, guaranteeing a tight seal during the testing process. Matching through holes are provided at the center of both the connecting plate and the sealing element, and the through hole at the top of the connecting plate is detachably connected to the quick-connect fitting.

Description

Technical Field

[0001] This utility model relates to a connection device used for sealing testing, specifically a heat exchanger sealing testing connection device. Background Technology

[0002] The retarder is an important auxiliary device in the vehicle braking system. During operation, the retarder generates a significant amount of heat, requiring a heat exchanger to assist in heat dissipation and maintain its normal operating temperature. Poor sealing of the heat exchanger can lead to coolant leakage, affecting its heat dissipation efficiency and causing excessively high retarder temperatures. This can impact the lifespan and safety of the vehicle braking system and related components. Therefore, to ensure the safe operation of the vehicle braking system, heat exchanger sealing tests are typically performed to determine its integrity or the cause of any retarder malfunction. However, during heat exchanger sealing tests, the inlet and outlet nozzles are usually large in diameter and lack dedicated sealing test fixtures. Conventional fixtures and components are often used, resulting in poor sealing performance and unsuitability for high-pressure testing. Furthermore, the inconvenience of installing and disassembling the inlet and outlet oil connection fixtures further complicates the sealing test, leading to low efficiency.

[0003] Chinese patent CN215811418U discloses a sealing test connector for large-diameter nozzle heat exchangers, including an inlet, a retaining ring, a seal, a connector body, and a quick connector. The connector body and the retaining ring are locked together by threads, and the seal is tightly fitted to the inlet end face of the nozzle, ensuring the airtightness of the connection between the connector body and the inlet to improve the accuracy of the test data and ensure the safety of the test. However, since the retaining ring in this technical solution only engages with the inlet, it is easy for the retaining ring to loosen during installation. Therefore, the installation of the retaining ring and the connector body is inconvenient, and it is time-consuming and labor-intensive when conducting batch tests. Moreover, this technical solution is prone to wear after long-term use, which will cause the installation to be loose and thus affect the sealing performance. Therefore, the sealing test efficiency of this technical solution is low. Utility Model Content

[0004] The purpose of this invention is to solve the technical problems of existing sealing joints, such as inconvenient installation, easy wear, and thus affecting sealing performance and resulting in low sealing detection efficiency, and to provide a heat exchanger sealing detection connection device.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A heat exchanger seal testing connection device, characterized in that:

[0007] Includes quick-connect fitting, connecting plate, seal, first retaining ring and second retaining ring;

[0008] Both the first and second retaining rings are semi-circular structures. The first and second retaining rings are connected and locked by a spiral buckle to clamp the outer surface of the inlet and outlet water pipes of the heat exchanger to be tested.

[0009] The two ends of the connecting plate are connected to the two ends of the first retaining ring and the second retaining ring respectively by double-ended studs and two compression nuts. The two ends of the double-ended studs and the two compression nuts are used to press and connect the connecting plate with the inlet and outlet water pipes, so that the sealing element is tightly fitted with the end face of the inlet and outlet water pipes of the heat exchanger to be tested, ensuring the sealing performance.

[0010] Both the connecting plate and the sealing element have matching through holes at their center. The sealing element is located at the bottom of the connecting plate and is used for sealing the connection between the inlet and outlet water pipes and the connecting plate. A quick-connect fitting is connected to the through hole at the top of the connecting plate. The quick-connect fitting is used to connect to an external compressed air source.

[0011] Furthermore, the first retaining ring includes a first half-ring, a first connecting head and a first locking head respectively disposed at both ends of the first half-ring. Both the first connecting head and the first locking head are annular. The first locking head has a flat surface on the side near the second half-ring. The first connecting head and the first locking head are respectively provided with a retaining groove and a first locking groove along the radial direction of the first half-ring.

[0012] The second retaining ring includes a second half-ring, a second connecting head and a second locking head respectively disposed at both ends of the second half-ring. The shape of the second connecting head is adapted to the retaining groove, and the second locking head is a plate-shaped structure adapted to one side plane of the first locking head. The second locking head is provided with a second locking groove along the radial direction of the second half-ring.

[0013] The first connector, the second connector, and the first locking head are all provided with connecting holes of the same size, and the size of the connecting holes is adapted to the double-ended stud.

[0014] The second connector is inserted into the slot of the first connector. The lower end of one of the two double-ended studs passes through the first and second connectors, allowing the second retaining ring to rotate a certain angle around the double-ended stud for auxiliary device mounting and fixing. The upper end passes through the connecting plate and is connected to one end of the first and second retaining rings via two clamping nuts. The spiral buckle is set in the first locking groove and passes through the second locking groove to connect the first and second locking heads together. At the same time, the lower end of the other double-ended stud passes through the first locking head and the spiral buckle, and the upper end passes through the connecting plate and is connected to the other end of the first and second retaining rings via two clamping nuts.

[0015] Furthermore, one end of the spiral buckle is a connecting ring, the shape of which is adapted to the first locking groove. The connecting ring is disposed in the first locking groove and sleeved on the other outer side of the double-ended stud.

[0016] The other end of the spiral buckle is a stud, which passes through the second locking groove and locks the first locking head and the second locking head together with a locking nut.

[0017] Furthermore, both ends of the connecting plate are provided with fixing plates, and fixing holes are provided on the fixing plates. The upper end of the double-headed stud passes through the fixing holes and the connecting plate is fixed and pressed by the clamping nut.

[0018] Furthermore, a groove adapted to the size of the sealing element is provided at the center of the bottom of the connecting plate, and the sealing element is disposed in the groove at the bottom of the connecting plate.

[0019] Furthermore, a boss is provided at the center of the top of the connecting plate, and the boss is connected to the quick connector by a thread, which facilitates tightening and fixing with tools such as wrenches when installing the quick connector.

[0020] Furthermore, two tightening blocks for easy locking are provided radially on the outer end faces of the compression nut and the locking nut.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) This utility model utilizes a first retaining ring and a second retaining ring to be sleeved on the outside of the inlet and outlet of the heat exchanger to be tested, and fixes the first retaining ring and the second retaining ring together by a spiral buckle. Then, a double-headed stud is used to connect the two ends of the first retaining ring and the second retaining ring to the two ends of the connecting plate respectively. The clamping nut is used to clamp the connecting plate so that the sealing element at the bottom of the connecting plate is closely attached to the end face of the inlet and outlet of the heat exchanger to be tested, ensuring the sealing performance and the connection strength of the device. It is not easy to fall off during the test, and it can be frequently disassembled and reused without being easily damaged, thus improving the sealing test efficiency.

[0023] (2) In this utility model, the first connector and the second connector are coaxially connected to a double-ended stud through the connecting hole, so that the first retaining ring and the second retaining ring can be opened and closed to be sleeved at any position on the outside of the inlet and outlet water pipes of the heat exchanger to be tested. The connecting ring of the spiral buckle is sleeved on another double-ended stud and located in the first locking groove. The stud of the spiral buckle passes through the second locking groove and the first retaining ring and the second retaining ring are locked and fixed by the locking nut, ensuring that the inlet and outlet water pipes are clamped and the clamping force is uniform, avoiding the retaining ring from loosening. The entire device can be disassembled by simply loosening the locking nut. The structure is simple and the disassembly is convenient.

[0024] (3) The present invention provides a groove at the bottom center of the connecting plate that matches the size of the sealing element, which can effectively prevent the sealing from being incomplete due to the movement of the sealing element during installation, thus affecting the test results, further improving the sealing performance of the inlet and outlet water pipes of the heat exchanger to be tested, and improving the testing efficiency. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of an embodiment of a heat exchanger sealing detection connection device according to the present invention;

[0026] Figure 2 This is a cross-sectional view of the heat exchanger sealing detection connection device in an embodiment of this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the first retaining ring in an embodiment of the present utility model; wherein, Figure (a) is a top view of the first retaining ring, and Figure (b) is a bottom view of Figure (a);

[0028] Figure 4 This is a schematic diagram of the structure of the second retaining ring in an embodiment of the present utility model; wherein, Figure (a) is a top view of the second retaining ring, and Figure (b) is a bottom view of Figure (a);

[0029] Figure 5 This is a schematic diagram of the connecting plate in an embodiment of the present utility model; wherein, Figure (a) is a bottom view of the connecting plate and Figure (b) is a cross-sectional view of the connecting plate;

[0030] Figure 6 This is a schematic diagram of the spiral buckle structure in an embodiment of the present utility model;

[0031] Figure 7 This is a schematic diagram showing the connection relationship between the first retaining ring and the second retaining ring in an embodiment of this utility model.

[0032] In the diagram: 1-Quick connector, 2-Connecting plate, 21-Fixing plate, 22-Fixing hole, 23-Groove, 24-Boss, 3-Seal, 4-Inlet / outlet water pipe, 5-First retaining ring, 51-First half ring, 52-First connector, 53-First locking head, 54-Slot, 55-First locking groove, 6-Second retaining ring, 61-Second half ring, 62-Second connector, 63-Second locking head, 64-Second locking groove, 7-Spiral buckle, 8-Double-ended stud, 9-Pressure nut. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] See appendix Figure 1 and attached Figure 2As shown, this embodiment provides a heat exchanger sealing test connection device, including a quick-connect connector 1, a connecting plate 2, a sealing element 3, a first retaining ring 5 and a second retaining ring 6. The first retaining ring 5 and the second retaining ring 6 are both semi-annular structures, and the first retaining ring 5 and the second retaining ring 6 are connected and locked by a spiral buckle 7, which can clamp the outer surface of the inlet and outlet water pipes (4) of the heat exchanger to be tested. The two ends of the connecting plate 2 are connected to the two ends of the first retaining ring 5 and the second retaining ring 6 respectively by double-headed studs 8 and two compression nuts 9. The connecting plate 2 is pressed by tightening the compression nuts 9. The sealing element 3 is set at the bottom center groove 23 of the connecting plate 2. A square boss 24 is set at the top center of the connecting plate 2. A through hole is set at the center of the connecting plate 2 and the sealing element 3. The quick-connect connector 1 is threaded to the top through hole of the connecting plate 2 and is located on the square boss 24. The quick-connect connector 1 is connected to an external compressed air source.

[0035] As attached Figure 3 and attached Figure 4 As shown, the first retaining ring 5 includes a first half-ring 51, a first connecting head 52 and a first locking head 53 respectively disposed at both ends of the first half-ring 51. The first connecting head 52 and the first locking head 53 are both annular. The first locking head 53 has a flat surface on the side near the second half-ring (6). The first connecting head 52 and the first locking head 53 are respectively provided with a retaining groove 54 and a first locking groove 55 along the radial direction of the first half-ring 51. The second retaining ring 6 includes a second half-ring 61, a second connecting head 62 and a second locking head 63 respectively disposed at both ends of the second half-ring 61. The shape of the second connecting head 62 is adapted to the retaining groove 54. The second locking head 63 is a plate-shaped structure adapted to the flat surface on one side of the first locking head 53. The second locking head 63 is provided with a second locking groove 64 along the radial direction of the second half-ring 61. The first connecting head 52, the second connecting head 62 and the first locking head 53 are all provided with connecting holes of the same size. The size of the connecting holes is adapted to the double-ended stud 8.

[0036] As attached Figure 5 As shown, both ends of the connecting plate 2 are provided with fixing plates 21. Fixing holes 22 are provided on the fixing plates 21. The double-headed studs 8 pass through the fixing holes 22 and the connecting holes and are threadedly connected to the clamping nuts 9. By tightening the clamping nuts 9, the connecting plate 2 is pressed so that the bottom surface of the sealing element 3 is pressed against the end face of the inlet and outlet water pipes 4 of the heat exchanger to be tested, so as to ensure good sealing.

[0037] As attached Figure 6 As shown, one end of the spiral buckle 7 is a connecting ring, the size and width of which are adapted to the first locking groove 55. The connecting ring is sleeved on the outside of the double-ended stud 8 and located within the first locking groove 55; the other end of the spiral buckle 7 is a stud, as shown in the attached figure. Figure 7 As shown, the stud passes through the second locking groove 64 and locks the first locking head 53 and the second locking head 63 together with the locking nut.

[0038] To facilitate tightening and loosening without the need for additional tools, both the locking nut and the clamping nut 9 are designed with irregular shapes, such as tightening blocks on their surfaces.

[0039] The connection method for this device during heat exchanger sealing testing is as follows:

[0040] (1) Connect the quick connector 1 to the connecting plate 2 by thread. To ensure sealing, sealant tape can be wrapped around the quick connector 1. Two double-ended studs 8 are passed through the fixing holes 22 on the fixing plates 21 at both ends of the connecting plate, and two clamping nuts 9 are pre-tightened to one end of the two double-ended studs 8. Then, the connecting ring of the spiral buckle 7 is engaged in the first locking groove 55 of the first buckle. The other ends of the two double-ended studs 8 are passed through the connecting holes of the first buckle 5 and the second buckle 6, and the connecting ring of the spiral buckle 7 is engaged with the clamping nuts 9.

[0041] (2) Place the sealing element 3, press one side of the sealing element 3 into the groove 23 at the bottom of the connecting plate 2, open the second retaining ring 6 at a certain angle, and put the whole device on the inlet and outlet water pipes 4 of the heat exchanger to be tested, so that the inner arc surface of the first retaining ring 5 matches the outer surface of the inlet and outlet water pipes 4.

[0042] (3) Adjust the second retaining ring 6 so that the inner arc surface of the second retaining ring 6 matches the outer surface of the inlet and outlet water pipes 4, and adjust the stud of the spiral buckle 7 to pass through the second locking head 63 and pre-tighten the locking nut;

[0043] (4) Tighten the two compression nuts 9 on the top of the connecting plate 2 simultaneously until the other side of the seal 3 is tightly fitted with the end face of the inlet and outlet water pipes 4, and then tighten the locking nut to make the device tightly fixed to the inlet and outlet water pipes 4.

[0044] (5) Connect external testing equipment and conduct heat exchanger sealing test. After the test is completed, disconnect the compressed air source of quick connector 1, loosen the locking nut and clamping nut 9, rotate the stud of spiral buckle 7, adjust the angle of second retaining ring 6, and take out the device assembly.

[0045] (6) When testing the 2nd, 3rd...nth heat exchanger, the method is the same as steps (1) to (5) above.

[0046] The above are merely embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the technical solution of this utility model should be included within the protection scope of this utility model. Furthermore, it should be noted that the accompanying drawings are merely illustrative and are not drawn to scale, and should not be construed as limiting the actual scope of protection claimed by this utility model.

Claims

1. A heat exchanger sealing detection connection device, characterized in that: Includes quick-connect fitting (1), connecting plate (2), seal (3), first retaining ring (5), and second retaining ring (6); Both the first retaining ring (5) and the second retaining ring (6) are semi-circular structures. The first retaining ring (5) and the second retaining ring (6) are connected and locked by a spiral buckle (7) to clamp the outer surface of the inlet and outlet water pipes (4) of the heat exchanger to be tested. The two ends of the connecting plate (2) are connected to the two ends of the first retaining ring (5) and the second retaining ring (6) respectively by double-headed studs (8) and two clamping nuts (9). The two ends of the double-headed studs (8) and the two clamping nuts (9) are used to clamp the connecting plate (2) and the inlet and outlet water pipes (4). The connecting plate (2) and the sealing element (3) are both provided with matching through holes at their center positions. The sealing element (3) is located at the bottom of the connecting plate (2) and is used for sealing connection between the inlet and outlet water pipes (4) and the connecting plate (2). A quick connector (1) is connected to the top through hole of the connecting plate (2). The quick connector (1) is used to connect to an external compressed air source.

2. The heat exchanger sealing detection connection device according to claim 1, characterized in that: The first retaining ring (5) includes a first half ring (51), a first connector (52) and a first locking head (53) respectively disposed at both ends of the first half ring (51). The first connector (52) and the first locking head (53) are both annular. The first locking head (53) has a flat surface on the side near the second half ring (61). The first connector (52) and the first locking head (53) are respectively provided with a retaining groove (54) and a first locking groove (55) along the radial direction of the first half ring (51). The second retaining ring (6) includes a second half ring (61), a second connector (62) and a second locking head (63) respectively disposed at both ends of the second half ring (61). The shape of the second connector (62) is adapted to the retaining groove (54). The second locking head (63) is a plate-shaped structure adapted to one side plane of the first locking head (53). The second locking head (63) is provided with a second locking groove (64) along the radial direction of the second half ring (61). The first connector (52), the second connector (62) and the first locking head (53) are all provided with connecting holes of the same size, and the size of the connecting holes is adapted to the double-ended stud (8); The second connector (62) is inserted into the slot (54) of the first connector (52). The lower end of one of the two double-headed studs (8) passes through the first connector (52) and the second connector (62), and the upper end passes through the connecting plate (2). The two clamping nuts (9) are used to connect one end of the connecting plate (2) to one end of the first retaining ring (5) and the second retaining ring (6). The spiral buckle (7) is set in the first locking groove (55) and passes through the second locking groove (64) to connect the first locking head (53) and the second locking head (63) together. At the same time, the lower end of the other double-headed stud (8) passes through the first locking head (53) and the spiral buckle (7), and the upper end passes through the connecting plate (2). The two clamping nuts (9) are used to connect the other end of the connecting plate (2) to the other end of the first retaining ring (5) and the second retaining ring (6).

3. The heat exchanger sealing detection connection device according to claim 2, characterized in that: One end of the spiral buckle (7) is a connecting ring, the shape of which is adapted to the first locking groove (55). The connecting ring is set in the first locking groove (55) and sleeved on the other side of the double-headed stud (8). The other end of the spiral buckle (7) is a stud, which passes through the second locking groove (64) and locks the first locking head (53) and the second locking head (63) together with the locking nut.

4. The heat exchanger sealing detection connection device according to claim 2, characterized in that: Both ends of the connecting plate (2) are provided with fixing plates (21), and fixing holes (22) are provided on the fixing plates (21). The upper end of the double-headed stud (8) passes through the fixing holes (22) and the connecting plate (2) is fixed and pressed by the clamping nut (9).

5. The heat exchanger sealing detection connection device according to claim 1, characterized in that: The bottom center of the connecting plate (2) is provided with a groove (23) that is adapted to the size of the sealing element (3), and the sealing element (3) is provided in the groove (23) at the bottom of the connecting plate (2).

6. The heat exchanger sealing detection connection device according to claim 1, characterized in that: The connecting plate (2) has a boss (24) at the top center, and the boss (24) is connected to the quick connector (1) by a thread.

7. The heat exchanger sealing detection connection device according to claim 3, characterized in that: The compression nut (9) and the locking nut have two tightening blocks arranged radially on their outer end faces for easy locking.

Images