A detection tool for testing a part for leaks

Abstract

The present application relates to a kind of detection tool for testing the leakage of parts, detection tool includes standard sealing ball, connecting joint, booster assembly, the gas path is opened in the connecting joint, the gas path one end is communicated with the booster assembly, the other end is provided with mounting groove, the opening of the gas path one end is equipped with standard sealing ball limit slot between the mounting groove, the standard sealing limit slot is matched with the standard sealing ball, and is provided with the air passage of the mounting groove and the gas path, so that when the outer edge of the mounting groove and the end surface of the part to be detected provided with the opening are sealed and contacted, the two ends of the standard sealing ball are respectively contacted with the sealing surface and the standard sealing ball limit slot, the mounting groove is kept in communication with the gas path by air passage, and the booster assembly can be inflated and pressurized in the mounting groove and the gas path.Compared with the prior art, the present application has the advantages of high detection efficiency, easy to use, improve rework efficiency, etc.

Description

Technical Field

[0001] This invention relates to the field of mechanical testing technology, and in particular to a testing fixture for testing leaks in parts. Background Technology

[0002] A type of part with a sealing surface, such as Figure 5 , Figure 6 As shown, one end of the part has a cavity, and the inner wall of the cavity is a sealing surface. Before this type of part enters the market, it must undergo a vacuum test. The general requirement for leak testing is: at @24″Hg, for 2 seconds, the pressure gauge reading should not decrease by more than 1″Hg.

[0003] Because this leak detection method has high requirements, it also places high demands on the quality and skills of the testing personnel, which greatly limits the difficulty and efficiency of leak detection.

[0004] Currently, there is a lack of devices that can reduce the difficulty of testing the sealing performance of such parts without affecting the accuracy of the test. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a detection fixture for testing leaks in parts.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] The technical solution of the present invention is to provide a detection fixture for testing leakage in a component. A conical protrusion is provided on one end face of the component to be tested. A passage is formed on the conical protrusion along its protrusion direction. A sealing surface is provided on the inner edge of the opening at one end of the passage.

[0008] The testing fixture includes a standard sealing ball, a connecting joint, and a pressurization assembly.

[0009] An air passage is provided through the connector. One end of the air passage is connected to the pressurization component, and the other end has a mounting groove. A standard sealing ball limiting groove is provided between the opening of one end of the air passage and the mounting groove.

[0010] The standard sealing limiting groove is adapted to the standard sealing ball and has a venting groove that connects the mounting groove and the air passage, so that when the outer edge of the mounting groove seals against the end face of the part to be tested with the opening, both ends of the standard sealing ball abut against the sealing surface and the standard sealing ball limiting groove respectively. The mounting groove is kept connected to the air passage through the venting groove, and the pressurizing component can pressurize the mounting groove and the air passage.

[0011] When the sealing surface and the standard sealing ball are in good seal, the pressure in the mounting groove and the air passage is maintained.

[0012] When the sealing surface fails to seal properly with the standard sealing ball, the pressure inside the mounting groove and the air passage leaks outward through the channel.

[0013] In some specific embodiments, a groove is provided around the outer edge of the mounting groove along the outer periphery of the air passage opening, and a sealing ring is provided in the groove. The two sides of the sealing ring are respectively sealed and abutted against the groove and the end face of the part to be tested where the opening is provided.

[0014] In some specific embodiments, the booster gas assembly includes an air pipe connected to the air passage and an air pump connected to the air pipe.

[0015] In some specific embodiments, one end of the air pipe is provided with an air pipe connector that is sealed to the air passage, and the other end of the air pipe is provided with a pressure reducing valve that is connected to the air pump.

[0016] In some specific embodiments, the air pipe is equipped with a switch valve.

[0017] In some specific embodiments, the connecting joint is also provided with a pressure gauge for detecting the air pressure in the air passage.

[0018] In some specific embodiments, the top of the connecting joint is provided with a detection passage that communicates with the air passage. One end of the detection passage is connected to the air passage, and the other end is connected to the pressure gauge.

[0019] In some specific embodiments, the testing fixture further includes a push rod for fixing the part to be tested, wherein the end face of the part to be tested away from the cavity abuts against the connecting rod end of the push rod.

[0020] In some specific embodiments, a washer is provided at the end of the connecting rod.

[0021] In some specific embodiments, the push rod is fixed to the base plate, and the connecting joint is also fixed to the base plate.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) High efficiency: The testing fixture of this invention is a comprehensive inspection tool with high testing efficiency and easy to make a quick judgment on site.

[0024] (2) Simple and easy to use: The testing equipment of this invention does not require high skill level from employees. As long as they master basic testing skills, they can complete the inspection independently.

[0025] (3) Improve rework efficiency: Parts that have passed the inspection by using the tooling of this invention can be transferred to subsequent processes without leakage due to quality issues, which greatly improves delivery efficiency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention.

[0027] Figure 2 This is an exploded view of the structure of the present invention.

[0028] Figure 3 This is a three-dimensional structural diagram of the connector of the present invention.

[0029] Figure 4 This is a side view of the structure of the connector of the present invention.

[0030] Figure 5 This is a schematic diagram of the three-dimensional structure of the part to be inspected.

[0031] Figure 6 This is a side view of the structure of the part to be inspected.

[0032] The diagram is labeled as follows:

[0033] 1 is the push rod, 2 is the pressure gauge, 3 is the switch valve, 4 is the pressure reducing valve, 5 is the air pipe connector, 6 is the standard sealing ball, 7 is the sealing ring, 8 is the air pipe, 9 is the bolt, 10 is the base plate, 11 is the connecting joint, 11-1 is the detection passage, 11-2 is the air passage, 11-3 is the air vent, 11-4 is the groove, 12 is the part to be tested, and 13 is the air pump. Detailed Implementation

[0034] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] In the following embodiments, unless otherwise specified, the functional components or structures are conventional components or structures used in the art to achieve the corresponding functions.

[0038] Example 1:

[0039] like Figures 5-6The part 12 to be tested shown has a conical protrusion on one end face. The conical protrusion has a channel along its protrusion direction, and a sealing surface is provided on the inner edge of the opening at one end of the channel.

[0040] like Figures 1-4 As shown, this is a testing fixture for testing leaks in parts, including a standard sealing ball 6, a connecting joint 11, and a pressure boosting assembly.

[0041] An air passage 11-2 is provided through the connecting joint 11. One end of the air passage 11-2 is connected to the pressurization component, and the other end has a mounting groove. A standard sealing ball limiting groove is provided between the opening of one end of the air passage 11-2 and the mounting groove.

[0042] The standard sealing limiting groove is adapted to the standard sealing ball 6, and a venting groove 11-3 is provided to connect the mounting groove and the air passage 11-2, so that when the outer edge of the mounting groove is in sealing contact with the end face of the part to be tested 12 with the opening, both ends of the standard sealing ball 6 are respectively in contact with the sealing surface and the standard sealing ball limiting groove. The mounting groove is kept in communication with the air passage 11-2 through the venting groove 11-3, and the pressurization component can pressurize the mounting groove and the air passage 11-2.

[0043] When the sealing surface and the standard sealing ball 6 are well sealed, the pressure in the mounting groove and the air passage 11-2 is maintained;

[0044] When the sealing surface fails to seal properly with the standard sealing ball 6, the pressure inside the mounting groove and the air passage 11-2 leaks outward through the channel.

[0045] In this technical solution, the pressure-holding capacity of the gas path 11-2 is used to determine whether gas flows into the channel of the part to be tested 12. When the gas path 11-2 cannot hold pressure and leaks into the channel, an airflow path is formed from the gas path 11-2 through the vicinity of the standard sealing ball 6 to the channel. When no leakage occurs, this airflow path is closed. That is, when the structure of the part to be tested 12 (the channel sealing surface seals with the standard sealing ball 6) meets the standard, no leakage occurs; when the structure of the part to be tested 12 does not meet the standard, leakage occurs.

[0046] To improve detection accuracy, a groove 11-4 is provided around the outer edge of the mounting groove along the outer periphery of the opening of the air passage 11-2. A sealing ring 7 is provided in the groove 11-4. The two sides of the sealing ring 7 are respectively sealed and abutted against the groove 11-4 and the end face of the part to be tested 12 with the opening.

[0047] The pressurization component includes an air pipe 8 connected to the air path 11-2 and an air pump 13 connected to the air pipe 8. One end of the air pipe 8 is provided with an air pipe joint 5 that is hermetically connected to the air path 11-2, the other end of the air pipe 8 is provided with a pressure reducing valve 4 connected to the air pump 13, and a switch valve 3 is provided on the air pipe 8. Exemplarily, the pressure reducing valve 4 is a pressure gauge pressure reducing valve, and the switch valve 3 is a manual valve quick joint switch. The air pressure in the air path 11-2 is adjusted to a specified value through the pressure reducing valve 4, and the switch valve 3 is closed to maintain a sealed state to detect the airtightness of the part to be detected 12.

[0048] The top of the connection joint 11 is provided with a detection passage 11-1 communicating with the air path 11-2. One end of the detection passage 11-1 communicates with the air path 11-2, and the other end is connected to the pressure gauge 2. The pressure of the air path 11-2 is monitored through the pressure gauge 2 to reflect the airtightness of the part to be detected 12.

[0049] The detection tooling further includes a push rod 1 for fixing the part to be detected 12. The end face of the part to be detected 12 away from the cavity abuts against the connecting rod end of the push rod 1. Exemplarily, the push rod 1 can be an elbow clamp horizontal pressing type quick clamp. To avoid bruising the part to be detected 12, a gasket is provided at the connecting rod end.

[0050] The bottom plate 10 and the push rod 1, connection joint 11 are respectively connected and fixed by bolts 9 to maintain the stability of the part to be detected 12 and the connection joint 11.

[0051] The detection tooling of the present invention provides an operation method:

[0052] During operation, first fix the bottom plate 10, connection joint 11, and push rod 1 with bolts 9. The connection joint 11 is connected to the pressure gauge 2, air pipe joint 5, air pipe 8, switch valve 3, pressure reducing valve 4, and air pump 13. Close the switch valve 3 on the air pipe 8 and adjust the pressure reducing valve 4 to 0.08 MPa. Then, sequentially install a standard sealing ball 6, sealing ring 7, and the part to be detected 12 in the connection joint 11. The push rod 1 pushes the standard sealing ball 6 to the standard sealing ball limiting groove at the port of the air path 11-2 through the part to be detected 12, so that the outer edge of the installation groove of the connection joint 11 is hermetically abutted against the end face with an opening on the part to be detected 12. Both ends of the standard sealing ball 6 are respectively abutted against the sealing surface and the standard sealing ball limiting groove, and the part to be detected 12 is fixed. When the connection is completed, turn on the air pump 13 and switch valve 3. When it is confirmed that the air pressure of the pressure gauge 2 reaches 0.08 MPa, close the switch valve 3. Observe the pressure value of the pressure gauge 2 and keep it for 4 seconds. If the pressure drop is less than 0.0067 MPa, it is qualified; otherwise, it is unqualified.

[0053] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A testing fixture for testing leakage in a component, wherein a conical protrusion is provided on one end face of the component (12) to be tested, a passage is provided on the conical protrusion along its protrusion direction, and a sealing surface is provided on the inner edge of the opening at one end of the passage, characterized in that, The testing fixture includes a standard sealing ball (6), a connecting joint (11), and a pressurization assembly. An air passage (11-2) is provided through the connecting joint (11). One end of the air passage (11-2) is connected to the pressurization component, and the other end is provided with a mounting groove. A standard sealing ball limiting groove is provided between the opening of one end of the air passage (11-2) and the mounting groove. The standard sealing limiting groove is adapted to the standard sealing ball (6) and has a venting groove (11-3) that connects the mounting groove and the air passage (11-2) so that when the outer edge of the mounting groove is sealed against the end face of the part to be tested (12) with the opening, the two ends of the standard sealing ball (6) respectively abut against the sealing surface and the standard sealing ball limiting groove. The mounting groove is connected to the air passage (11-2) through the venting groove (11-3), and the pressurizing component can pressurize the mounting groove and the air passage (11-2) by filling them with air. When the sealing surface and the standard sealing ball (6) are well sealed, the pressure in the mounting groove and the air passage (11-2) is maintained; When the sealing surface fails to seal properly with the standard sealing ball (6), the pressure in the mounting groove and the air passage (11-2) leaks outward through the channel.

2. The testing fixture according to claim 1, characterized in that, A groove (11-4) is provided around the outer edge of the mounting groove along the opening of the air passage (11-2). A sealing ring (7) is provided in the groove (11-4). The two sides of the sealing ring (7) are respectively sealed and abutted against the groove (11-4) and the end face of the part to be tested (12) with the opening.

3. The testing fixture according to claim 1, characterized in that, The booster air assembly includes an air pipe (8) connected to the air passage (11-2) and an air pump connected to the air pipe (8).

4. The testing fixture according to claim 3, characterized in that, One end of the air pipe (8) is provided with an air pipe connector (5) that is sealed to the air passage (11-2), and the other end of the air pipe (8) is provided with a pressure reducing valve (4) that is connected to the air pump.

5. The testing fixture according to claim 4, characterized in that, The air pipe (8) is equipped with a switch valve (3).

6. The testing fixture according to claim 1, characterized in that, The connecting joint (11) is also equipped with a pressure gauge (2) for detecting the air pressure of the air passage (11-2).

7. The testing fixture according to claim 6, characterized in that, The top of the connecting connector (11) is provided with a detection passage (11-1) that communicates with the air passage (11-2). One end of the detection passage (11-1) is connected to the air passage (11-2), and the other end is connected to the pressure gauge (2).

8. The testing fixture according to claim 1, characterized in that, The testing fixture also includes a push rod (1) for fixing the part to be tested (12), with the end face of the part to be tested (12) away from the passage abutting against the connecting rod end of the push rod (1).

9. The testing fixture according to claim 8, characterized in that, The connecting rod end is provided with a washer.

10. The testing fixture according to claim 8, characterized in that, The push rod (1) is fixed on the base plate (10), and the connecting joint (11) is also fixed on the base plate (10).

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