Leakage detection device and detection apparatus

Abstract

The utility model provides a kind of sealing detection device and detection equipment, it is related to sealing test technical field, the sealing detection device includes detection tooling, two groups of inflation plugging component and air tightness detector, detection tooling includes jig base and jig upper seat, vacuum test cavity is opened in jig upper seat, jig upper seat is matched with jig base, and vacuum test cavity is closed by jig base, to seal workpiece in vacuum test cavity;The inflation plugging end of inflation plugging component is movably arranged in vacuum test cavity, for being connected with the air inlet pipe and air outlet pipe of workpiece;The detection end of air tightness detector is sealingly connected with vacuum test cavity.Workpiece is placed in vacuum test cavity, the air inlet pipe and air outlet pipe of workpiece are sealed and inflated by inflation plugging end, air tightness detector detects the leakage of vacuum test cavity, the sealing of workpiece whole is detected, solve the problem that the detection area of existing detection device is limited, and the risk of missed detection is high.

Description

Technical Field

[0001] This utility model relates to the field of sealing test technology, and in particular to a sealing test device and test equipment. Background Technology

[0002] As a critical heat exchange component in power systems such as automobiles, construction machinery, and wind turbine gearboxes, oil coolers require absolute isolation between their internal oil passages and the external cooling medium. Leakage can lead not only to lubricant emulsification and system lubrication failure, but also to serious accidents such as overheating of the entire machine and bearing burnout.

[0003] For example, patent CN220418773U discloses a sealing detection device for an oil cooler. This device uses an air pump to introduce air into the oil cooler through the inlet, and then connects it to a detection box via a T-connector. It detects whether there is a gas leak inside the oil cooler. If there is a gas leak at the oil inlet or outlet, the leaked gas enters the detection box through the air inlet. Due to the pressure change, the gas pushes a piston block to slide inside the detection box, which in turn drives a spring to push a stop block to press against a pressure sensor. Finally, the pressure sensor displays the result. However, this device can only detect gas leaks at the oil inlet and outlet of the oil cooler. It cannot detect leaks in other parts, resulting in a limited detection area and a high risk of missed detections. Utility Model Content

[0004] In view of this, the present invention proposes a sealing detection device and equipment, which can solve the problem that the existing device can only detect whether there is gas leakage at the oil inlet and outlet of the oil cooler, and cannot detect when there is poor sealing in other parts, resulting in limited detection area and high risk of missed detection.

[0005] The technical solution of this utility model is implemented as follows: This utility model provides a sealing performance testing device, comprising: The testing fixture includes a fixture base and a movable fixture upper seat. The fixture base is used to place the workpiece, and the fixture upper seat has a vacuum testing chamber. The fixture upper seat is used to cooperate with the fixture base and to seal the vacuum testing chamber through the fixture base, so as to seal the workpiece in the vacuum testing chamber. Two sets of inflatable sealing assemblies are mounted on the upper seat of the fixture. The inflatable sealing end of each assembly is movably disposed within the vacuum testing chamber and is respectively used to connect to the inlet and outlet pipes of the workpiece. An airtightness tester, the testing end of which is sealed to the vacuum test chamber.

[0006] Based on the above technical solutions, preferably, the inflatable sealing assembly includes: A mounting base is disposed on the upper seat of the fixture; and A cylinder is mounted on the mounting base. The cylinder includes a main body and a piston rod connected to the main body. The piston rod passes through the mounting base and is located inside the vacuum test chamber. The inflation sealing end is located at the end of the piston rod and is made of flexible material. An inflation tube is provided inside the piston rod. An inflation hole is opened through the inflation sealing end. One end of the inflation tube is inserted into the inflation hole, and the other end of the inflation tube passes through the main body and is connected to an inflation connector.

[0007] More preferably, the main body and the mounting base are sealed together by a first sealing ring.

[0008] More preferably, the mounting base includes a mounting plate and a mounting body connected together. The mounting plate is connected to the main body, and the mounting body is fitted with a connecting member. The connecting member is sealed to the upper seat of the fixture through a second sealing ring, and the mounting body is sealed to the connecting member through a third sealing ring.

[0009] More preferably, the end of the inflation tube and the end of the inflation sealing end are spaced apart in the direction of movement of the piston rod.

[0010] Based on the above technical solutions, preferably, the upper seat of the fixture is provided with a first tracheal cavity and a second tracheal cavity, a first tracheal seat is provided in the first tracheal cavity, the air inlet pipe is embedded in the first tracheal seat, a second tracheal seat is provided in the second tracheal cavity, the air outlet pipe is embedded in the second tracheal seat, and the two inflation sealing ends are respectively provided in the first tracheal cavity and the second tracheal cavity.

[0011] Based on the above technical solutions, preferably, the fixture base is provided with a positioning groove, and the workpiece is limited and fixed in the positioning groove.

[0012] Based on the above technical solutions, preferably, it also includes at least one set of positioning mechanisms, wherein the positioning mechanism includes a positioning hole and a positioning post that fit together, wherein one of the positioning hole and the positioning post is disposed on the upper seat of the fixture, and the other is disposed on the base of the fixture.

[0013] Based on the above technical solutions, preferably, it also includes a marking mechanism disposed on the upper seat of the fixture, wherein the marking end of the marking mechanism is movably disposed within the vacuum testing chamber for marking the workpiece.

[0014] This utility model also provides a testing device, including the sealing testing device described above.

[0015] The sealing performance testing device and equipment of this utility model have the following advantages over the prior art: (1) By fitting the upper fixture seat onto the base fixture, the workpiece is positioned on the base fixture, thereby sealing the workpiece in the vacuum test chamber. The movement of the two gas-filling sealing ends seals the inlet and outlet pipes respectively. Dry gas is then injected into the workpiece through one set of gas-filling sealing components. The gas tightness tester detects whether there is gas leakage in the vacuum test chamber, thus achieving the test of the workpiece's sealing performance. This device can test the overall sealing performance of the workpiece, thereby effectively solving the problem that the existing device can only detect whether there is gas leakage at the oil inlet and outlet of the oil cooler. When other parts have poor sealing, it cannot be detected, resulting in a limited detection area and a high risk of missed detection. (2) By placing the marking end of the marking mechanism inside the vacuum testing chamber, the marking mechanism is used to mark qualified or unqualified workpieces after the workpiece test is completed, avoiding errors caused by manual marking, improving the automation level of the production line, reducing manual labor, and increasing production efficiency. In addition, since the marking action is completed inside the vacuum testing chamber, the workpiece can be marked synchronously without secondary transfer, thereby reducing logistics links and avoiding the risk of material mixing. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the overall structure of the sealing performance testing device of this utility model; Figure 2 This is an exploded view of the sealing performance testing device of this utility model; Figure 3 This is a perspective view of the fixture upper seat in the sealing test device of this utility model; Figure 4 This is a side view of the fixture upper seat in the sealing test device of this utility model; Figure 5 for Figure 4 A cross-sectional view along the AA direction; Figure 6 for Figure 5 Enlarged view of section B in the middle.

[0018] Figure label: 1. Inspection fixture; 11. Fixture base; 111. Positioning groove; 12. Fixture upper seat; 121. First air tube cavity; 122. Second air tube cavity; 13. Vacuum test chamber; 14. First air tube seat; 15. Second air tube seat; 2. Inflation and sealing assembly; 21. Inflation and sealing end; 211. Inflation hole; 22. Mounting seat; 221. Mounting plate; 222. Mounting body; 23. Cylinder; 231. Main body; 232. Piston rod; 24. Inflation pipe; 25. First sealing ring; 26. Connector; 27. Second sealing ring; 28. Third sealing ring; 29. ​​Spacing; 210. Inflation connector; 3. Positioning mechanism; 31. Positioning hole; 32. Positioning post; 4. Marking mechanism; 41. Marking end; 100. Workpiece; 101. Inlet pipe; 102. Outlet pipe. Detailed Implementation

[0019] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0020] like Figures 1 to 6 As shown, this utility model provides a sealing test device, which includes a test fixture 1, two sets of gas-filled sealing components 2, and an airtightness tester. The test fixture 1 includes a fixture base 11 and a movable fixture upper seat 12. The fixture base 11 is used to place the workpiece 100. The fixture upper seat 12 has a vacuum test chamber 13. The fixture upper seat 12 is used to cooperate with the fixture base 11 and to seal the vacuum test chamber 13 through the fixture base 11, so as to seal the workpiece 100 in the vacuum test chamber 13. The two sets of gas-filled sealing components 2 are disposed on the fixture upper seat 12. The gas-filled sealing end 21 of the gas-filled sealing component 2 is movably disposed in the vacuum test chamber 13 and is used to connect to the air inlet pipe 101 and the air outlet pipe 102 of the workpiece 100, respectively. The test end of the airtightness tester is sealed to the vacuum test chamber 13.

[0021] Workpiece 100 is placed on fixture base 11, and fixture upper seat 12 is placed on fixture base 11, thereby sealing workpiece 100 in vacuum test chamber 13. The movement of two gas-filling sealing ends 21 seals the inlet pipe 101 and outlet pipe 102 respectively, and dry gas is injected into workpiece 100 through one of the gas-filling sealing components 2. The air tightness tester detects whether there is gas leakage in vacuum test chamber 13, thereby realizing the test of the sealing performance of workpiece 100. This device can test the overall sealing performance of workpiece 100, thus effectively solving the problem that existing devices can only detect whether there is gas leakage at the oil inlet and outlet of the oil cooler, and cannot detect when there is poor sealing in other parts, resulting in limited detection area and high risk of missed detection.

[0022] In this embodiment, the testing of an automotive oil cooler is used as an example for illustration. However, those skilled in the art will understand that this device is applicable as long as the workpiece 100 has an inlet pipe 101 and an outlet pipe 102 and the sealing of the outer casing needs to be verified.

[0023] In some embodiments, the testing fixture 1 includes a fixture base 11 and a movable fixture upper seat 12. The movable setting of the fixture upper seat 12 includes manual drive and electric drive. The manual drive is that the operator directly places the fixture upper seat 12 on the fixture base 11. The electric drive includes using a driving component such as a cylinder 23 or a motor to drive the movement of the fixture upper seat 12, thereby setting the fixture upper seat 12 on the fixture base 11 for cooperation with the fixture base 11.

[0024] In addition, to ensure the reliability of the vacuum test chamber 13 seal, the fixture base 11 and the fixture upper seat 12 are sealed together by a sealing ring.

[0025] In some embodiments, the inflation sealing assembly 2 includes a mounting base 22 and a cylinder 23. The mounting base 22 is disposed on the upper fixture 12; the cylinder 23 is disposed on the mounting base 22. The cylinder 23 includes a main body 231 and a piston rod 232 connected to the main body 231. The piston rod 232 passes through the mounting base 22 and is located inside the vacuum test chamber 13. The inflation sealing end 21 is disposed at the end of the piston rod 232 and is made of a flexible material. An inflation tube 24 is disposed inside the piston rod 232. An inflation hole 211 is opened through the inflation sealing end 21. One end of the inflation tube 24 is inserted into the inflation hole 211, and the other end of the inflation tube 24 passes through the main body 231 and is connected to an inflation connector 210. By using a flexible material for the inflation sealing end 21, the force applied when sealing the inlet pipe 101 or outlet pipe 102 is flexible, effectively avoiding damage to the workpiece 100 and affecting the test results. Furthermore, the inflation tube 24 is placed inside the cylinder 23, the mounting base 22, and the inflation sealing end 21, providing safety protection for the inflation tube 24 and ensuring inflation stability. Additionally, during the sealing process of the workpiece 100, the workpiece 100 can be directly connected to the inflation tube 24, reducing operational steps and improving testing efficiency.

[0026] Optionally, the main body 231 and the mounting base 22 are sealed together by a first sealing ring 25 to ensure a sealed connection between the cylinder 23 and the mounting base 22, and to ensure that the sealing effect is not affected by gas leakage during the movement of the cylinder 23.

[0027] In some embodiments, the mounting base 22 includes a mounting plate 221 and a mounting body 222 connected together. The mounting plate 221 is connected to the main body 231. The mounting body 222 is fitted with a connector 26. The connector 26 is sealed to the upper fixture seat 12 through a second sealing ring 27. The mounting body 222 is sealed to the connector 26 through a third sealing ring 28. The double sealing using the second sealing ring 27 and the third sealing ring 28 further prevents gas leakage and improves detection reliability.

[0028] Optionally, a gap 29 is formed between the end of the inflation tube 24 and the end of the inflation sealing end 21 in the moving direction of the piston rod 232. When the inflation sealing end 21 contacts the workpiece 100, it will undergo a certain deformation under the action of force to ensure the sealing effect. The gap 29 can effectively avoid the situation where the inflation tube 24 is deformed due to contact.

[0029] In some embodiments, the upper fixture 12 is provided with a first tracheal cavity 121 and a second tracheal cavity 122, both of which are connected to the vacuum testing chamber 13; a first tracheal seat 14 is provided in the first tracheal cavity 121, and an air inlet pipe 101 is embedded in the first tracheal seat 14; a second tracheal seat 15 is provided in the second tracheal cavity 122, and an air outlet pipe 102 is embedded in the second tracheal seat 15; and two inflation sealing ends 21 are respectively provided in the first tracheal cavity 121 and the second tracheal cavity 122. The inlet pipe 101 of the workpiece 100 is fixed by the first air pipe seat 14, and the outlet pipe 102 of the workpiece 100 is fixed by the second air pipe seat 15. Thus, during the process of sealing by moving the inflation sealing end 21, the relative positions of the inlet pipe 101 and the outlet pipe 102 can be guaranteed, ensuring the sealing effect and the inflation effect. This avoids the inlet pipe 101 or the outlet pipe 102 from shifting position during the sealing and inflation process, which would lead to poor sealing and cause the inflation pipe 24 to inflate the vacuum test chamber 13, affecting the test effect.

[0030] In some embodiments, the fixture base 11 is provided with a positioning groove 111, and the workpiece 100 is limited and fixed in the positioning groove 111. The positioning groove 111 enables the workpiece 100 to be accurately placed in the positioning groove 111 in one go during loading, thereby avoiding repeated manual adjustment of the position, shortening the loading cycle and reducing operation error. It can also ensure that the workpiece 100 will not shift during the inspection process, improving the repeatability and accuracy of the inspection.

[0031] In some embodiments, the sealing test device further includes at least one set of positioning mechanisms 3. Each positioning mechanism 3 includes a positioning hole 31 and a positioning post 32 that engage with each other. One of the positioning hole 31 and the positioning post 32 is disposed on the upper fixture 12, and the other is disposed on the fixture base 11. By inserting the positioning post 32 into the positioning hole 31, the positioning of the upper fixture 12 and the fixture base 11 is ensured to be accurate when closed, avoiding poor sealing due to misalignment. In this embodiment, two sets of positioning mechanisms 3 are provided, symmetrically arranged on both sides of the test fixture 1. Of course, multiple sets of positioning mechanisms 3 can also be provided, spaced apart on the test fixture 1.

[0032] In some embodiments, the sealing test device further includes a marking mechanism 4 disposed on the upper fixture 12. The marking end 41 of the marking mechanism 4 is movably disposed within the vacuum test chamber 13 for marking the workpiece 100. After the workpiece 100 is tested, the marking mechanism 4 marks the qualified or unqualified workpiece 100, avoiding errors from manual marking, improving the automation level of the production line, reducing manual labor, and increasing production efficiency. Furthermore, since the marking action is completed within the vacuum test chamber 13, the workpiece 100 can be marked synchronously without secondary transfer, thereby reducing logistics links and avoiding the risk of material mixing. In this embodiment, when the workpiece 100 test result is unqualified, the marking end 41 of the marking mechanism 4 moves to mark the workpiece 100.

[0033] The marking end 41 can be a drill bit, a marker pen, or an imprinting component, etc., used to imprint QR codes or characters. The marking mechanism 4 also includes a marking drive component, which is mounted on the fixture upper seat 12. The marking end 41 is connected to the movable end of the marking drive component, and the marking end 41 is moved by the marking drive component. The marking drive component can be a marking cylinder 23 or a marking motor, etc. In this embodiment, the marking drive component is a marking cylinder 23.

[0034] In summary, this application provides a sealing test device. The oil cooler workpiece 100 is placed on the fixture base 11 and positioned using the positioning groove 111. Then, the upper fixture seat 12 is moved onto the fixture base 11 to seal the vacuum test chamber 13. Next, two cylinders 23 drive the corresponding piston rods 232 to extend, causing the two gas-filling sealing ends 21 to respectively press against the inlet pipe 101 and outlet pipe 102 of the workpiece 100. Dry gas is then injected into one of the gas-filling pipes 24, and the test is performed using an airtightness tester. If the workpiece 100 fails the test, the marking end 41 of the marking mechanism 4 extends and marks the surface of the workpiece 100. Therefore, this device can detect the overall sealing performance of the workpiece 100, thus effectively solving the problem that existing devices can only detect whether there is gas leakage at the oil inlet and outlet of the oil cooler, and cannot detect when there is poor sealing in other parts, resulting in limited detection area and high risk of missed detection. This utility model also provides a detection device, including the sealing performance detection device described in the above embodiment.

[0035] like Figures 1 to 6 As shown, this utility model also provides a testing device, including the sealing testing device described above.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealing performance testing device, characterized in that, include: The testing fixture (1) includes a fixture base (11) and a movable fixture upper seat (12). The fixture base (11) is used to place the workpiece (100). The fixture upper seat (12) is provided with a vacuum testing chamber (13). The fixture upper seat (12) is used to cooperate with the fixture base (11) and to close the vacuum testing chamber (13) through the fixture base (11) so as to seal the workpiece (100) in the vacuum testing chamber (13). Two sets of inflation sealing assemblies (2) are disposed on the upper seat (12) of the fixture. The inflation sealing end (21) of the inflation sealing assembly (2) is movably disposed in the vacuum test chamber (13) and is respectively used to connect to the air inlet pipe (101) and the air outlet pipe (102) of the workpiece (100); and The airtightness tester has its testing end sealed to the vacuum test chamber (13).

2. The sealing performance testing device as described in claim 1, characterized in that: The inflatable sealing assembly (2) includes: Mounting base (22) is disposed on the upper seat (12) of the fixture; and A cylinder (23) is mounted on the mounting base (22). The cylinder (23) includes a main body (231) and a piston rod (232) connected to the main body (231). The piston rod (232) passes through the mounting base (22) and is located in the vacuum test chamber (13). The inflation sealing end (21) is located at the end of the piston rod (232) and is made of flexible material. An inflation tube (24) is provided inside the piston rod (232). An inflation hole (211) is opened through the inflation sealing end (21). One end of the inflation tube (24) is inserted into the inflation hole (211), and the other end of the inflation tube (24) passes through the main body (231) and is connected to an inflation connector (210).

3. The sealing performance testing device as described in claim 2, characterized in that: The main body (231) and the mounting base (22) are sealed together by a first sealing ring (25).

4. The sealing performance testing device as described in claim 2, characterized in that: The mounting base (22) includes a mounting plate (221) and a mounting body (222) connected to each other. The mounting plate (221) is connected to the main body (231). The mounting body (222) is covered with a connector (26). The connector (26) is sealed to the upper fixture seat (12) through a second sealing ring (27). The mounting body (222) is sealed to the connector (26) through a third sealing ring (28).

5. The sealing performance testing device as described in claim 2, characterized in that: The end of the inflation tube (24) and the end of the inflation sealing end (21) are spaced apart (29) in the direction of movement of the piston rod (232).

6. The sealing performance testing device as described in claim 1, characterized in that: The fixture upper seat (12) is provided with a first tracheal cavity (121) and a second tracheal cavity (122), both of which are connected to the vacuum test chamber (13); A first tracheal seat (14) is provided in the first tracheal cavity (121), and the air inlet pipe (101) is embedded in the first tracheal seat (14). A second tracheal seat (15) is provided in the second tracheal cavity (122), and the air outlet pipe (102) is embedded in the second tracheal seat (15). Two air-filled sealing ends (21) are respectively provided in the first tracheal cavity (121) and the second tracheal cavity (122).

7. The sealing performance testing device as described in claim 1, characterized in that: The fixture base (11) is provided with a positioning groove (111), and the workpiece (100) is limited and fixed in the positioning groove (111).

8. The sealing performance testing device as described in claim 1, characterized in that: It also includes at least one positioning mechanism (3), which includes a positioning hole (31) and a positioning post (32) that are inserted and fitted together. One of the positioning hole (31) and the positioning post (32) is disposed on the upper seat (12) of the fixture, and the other is disposed on the base (11) of the fixture.

9. The sealing performance testing device as described in claim 1, characterized in that: It also includes a marking mechanism (4) disposed on the upper seat (12) of the fixture, wherein the marking end (41) of the marking mechanism (4) is movably disposed in the vacuum test chamber (13) for marking the workpiece (100).

10. A testing device, characterized in that: Includes the sealing detection device as described in any one of claims 1 to 9.

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