A push-pull type ground shell leak detection tool

Abstract

The utility model discloses a push -and -pull type ground connection shell leak detection tool belongs to spare and part detection technical field. The tool includes movable base, support positioning board, support, upper seal subassembly, air inlet pipe and lower seal subassembly. Support positioning board is connected on movable base through inverted V type guide rail, and is equipped with positioning hole in the middle part, and right side has right positioning spare, and support left side is equipped with left positioning assembly, and top is connected with upper seal subassembly and air inlet pipe, and upper and lower seal subassembly are all by linear pneumatic actuator drive, and respectively seal the upper and lower opening of the workpiece to be measured, and air inlet pipe communicates with gas source and pressure test pipeline, and movable base bottom is equipped with trundle. The utility model discloses through multidirectional positioning structure to improve the positioning accuracy, can according to workpiece size flexible adjustment sealing position, and the versatility is strong, and it is convenient to move and simple to operate, can effectively guarantee the accuracy of leak detection result, improve detection efficiency, reduce production cost and labor intensity, is suitable for the sealing detection of various ground connection shell.

Description

Technical Field

[0001] This utility model relates to the field of component testing technology, specifically to a push-pull type grounding shell leak detection tool. Background Technology

[0002] In industrial production, the sealing performance of grounding enclosure components is directly related to their performance and safety. Especially in fields with high protection requirements, such as power equipment and communication equipment, if there is a leakage problem in the grounding enclosure, external dust and moisture may enter the interior, causing short circuits, malfunctions, or even safety accidents. Therefore, leakage detection of grounding enclosures is a key link in the production process.

[0003] Current grounding casing leak detection fixtures suffer from several technical defects: The positioning structure design is unreasonable; most fixtures fix the workpiece under test using only a single direction, making it prone to workpiece displacement during testing. This results in incomplete sealing between the sealing component and the workpiece opening, leading to misjudgments in leak detection results. Furthermore, the high degree of manual intervention is a significant issue; the positioning and sealing operations of some fixtures require manual completion, increasing the workload of operators and making it susceptible to operational errors that affect detection accuracy, thus failing to meet the testing requirements of mass production. These problems severely restrict the efficient implementation of grounding casing leak detection and urgently require optimization and improvement. Utility Model Content

[0004] In view of the problems and shortcomings of the existing technology, this utility model provides a push-pull type grounding shell leak detection tool.

[0005] The technical solution of this utility model is as follows: This push-pull type grounding housing leak detection fixture includes a movable base, a support positioning plate, a bracket, an upper sealing assembly, an air inlet pipe, and a lower sealing assembly. The support positioning plate is connected to the platform on the upper part of the movable base through a V-shaped guide rail, and has a positioning hole in its middle. A right positioning component is provided on the right side of the support positioning plate. The upper part of the movable base is connected to the bracket, the left side of the bracket is connected to the left positioning assembly, and the top is connected to the upper sealing assembly and the air inlet pipe. The left positioning assembly includes a linear pneumatic actuator mounted on the bracket and a positioning plate connected to the free end of the pneumatic actuator. The upper sealing assembly includes an upper cover plate, which is driven to move up and down by a linear pneumatic actuator vertically mounted on the top of the bracket. The air outlet of the air inlet pipe passes through the upper cover plate and faces the interior of the workpiece to be tested. The air inlet is connected to the air source and pressure test pipeline. The lower sealing assembly is located at the bottom of the top platform of the movable base, and includes a lower cover plate, which is driven to move up and down by a linear pneumatic actuator vertically mounted at the bottom of the top platform of the movable base.

[0006] The upper cover plate is a circular plate, and the upper sealing assembly includes four sets of linear pneumatic actuators. The four sets of linear pneumatic actuators are evenly distributed along the circumference of the upper cover plate and fixed by a cross, which can ensure that the upper cover plate is subjected to uniform force and has a tight seal.

[0007] The left positioning component is provided in three sets, which are arranged in a linear array to improve the positioning accuracy and stability of the left side of the workpiece under test.

[0008] The support positioning plate is fixed to the platform on the upper part of the movable base by a connector, which is a bolt. Nuts that mate with the bolts are provided on the front side of both the support positioning plate and the upper platform of the movable base. The bolts (with nuts) secure the support positioning plate to the upper platform of the movable base, facilitating adjustment and ensuring a firm connection.

[0009] The right positioning component includes a vertical plate with reinforcing ribs on the outside, which can stabilize the positioning and enhance the rigidity of the plate.

[0010] The bottom of the upper cover plate is provided with a sealing plug, which is made of elastic and wear-resistant material to enhance the sealing effect and extend the service life.

[0011] The movable base is equipped with casters at the bottom, which facilitates the movement of the tooling to adapt to different testing scenarios.

[0012] The air inlet pipe is equipped with a pressure sensor interface, which facilitates the connection of pressure detection equipment to monitor the changes in air pressure inside the workpiece in real time.

[0013] The beneficial effects of this utility model are: Through the coordinated action of the left positioning component, right positioning component, and supporting positioning plate, the workpiece under test is positioned in multiple dimensions from the left, right, and top and bottom directions, effectively avoiding sealing failure caused by workpiece displacement during the testing process and ensuring the accuracy of leak detection results. The left positioning component, upper sealing component, and lower sealing component are all driven by linear pneumatic actuators, which can flexibly adjust the positioning position and sealing height according to the size of the workpiece under test, eliminating the need for special tooling for different specifications of workpieces, significantly reducing production costs and equipment storage requirements. The positioning and sealing operations are automated through linear pneumatic actuators, reducing manual intervention and the labor intensity of operators, while avoiding the impact of human operation errors on testing accuracy, meeting the high-efficiency testing requirements of mass production. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment; Figure 2 for Figure 1 Top view; Figure 3 This is a top view of the support frame; Figure 4 This is a sectional view of the workpiece to be measured; The components represented by the reference numerals in the diagram are: 1. Movable base; 2. Inverted V-shaped guide rail; 3. Support positioning plate; 4. Left positioning component; 5. Bracket; 6. Upper sealing component; 7. Air inlet pipe; 8. Linear pneumatic actuator; 9. Right positioning component; 10. Lower sealing component; 11. Connector; 12. Workpiece to be tested. Detailed Implementation

[0015] The technical means adopted to achieve the intended purpose of this utility model will be further described below with reference to the accompanying drawings of the embodiments of this utility model.

[0016] Example This embodiment provides a push-pull type grounding housing leak detection fixture. The components of this fixture are tightly connected and work together to achieve efficient and accurate leak detection of grounding housing components. Its overall structural design takes into account stability, versatility, and ease of operation. The specific structure, connection relationships, and functions of each part are as follows: The movable base 1 serves as the basic load-bearing component of the tooling. Its upper part is machined with a flat installation platform for installing components such as the support positioning plate 3 and the bracket 5. The lower part is equipped with four casters, which makes it convenient for operators to move the tooling to any designated position according to the testing needs of the production site.

[0017] The support positioning plate 3 is connected to the platform on the upper part of the movable base 1 through a sliding fit with the inverted V-shaped guide rail 2. The inverted V-shaped guide rail has an inverted V-shaped cross-section, which precisely matches the V-shaped groove at the bottom of the support positioning plate 3. This fit not only ensures the stability of the support positioning plate 3 during movement, but also limits its lateral displacement, making it easy for operators to install the positioning support plate by sliding. A circular positioning hole is opened in the middle of the support positioning plate 3. The diameter of the positioning hole matches the outer diameter of the lower part of the workpiece 12 to be tested. During testing, the lower part of the workpiece 12 to be tested passes through the positioning hole from top to bottom, thereby restricting the movement of the workpiece 12. The up-and-down movement of plate 2 provides a stable positioning base for subsequent sealing operations. In addition, the support positioning plate 3 and the upper platform of the movable base 1 are further fixed by the connector 11. The connector 11 is bolted, and the front side of the support positioning plate 3 and the upper platform of the movable base 1 are pre-welded with matching internal thread nuts. After the support positioning plate 3 is adjusted to the appropriate position, the bolts are passed from top to bottom through the bolt holes on the support positioning plate 3 and the nuts on the platform of the movable base 1. Tightening the bolts will firmly fix the support positioning plate 3 on the movable base 1, preventing the support positioning plate 3 from loosening during the testing process.

[0018] A right positioning component 9 is welded and fixed to the right side of the supporting positioning plate 3. The right positioning component 9 consists of a vertical plate and a reinforcing rib plate, which can fit tightly against the outer wall of the workpiece 12 to be tested from the right side, restricting the right displacement of the workpiece 12 to be tested and ensuring that the workpiece 12 to be tested will not shift to the right side during the testing process. In order to prevent the vertical plate from bending and deforming due to force during the positioning process, a triangular reinforcing rib plate is welded to the outside of the plate, which significantly improves the structural rigidity and load-bearing capacity of the right positioning component 9 and extends its service life.

[0019] The upper platform of the movable base 1 is fixedly connected to the bracket 5 by bolts; the left positioning component 4 is installed on the left side wall of the bracket 5 by bolts. In this embodiment, there are three sets of left positioning components 4, which are evenly distributed in a linear array. This multi-array arrangement can position the workpiece 12 to be tested from multiple directions on the left side, avoiding workpiece displacement caused by uneven force on a single positioning point, and further improving positioning stability. Each set of left positioning components 4 includes a linear pneumatic actuator 8 and a positioning plate. The linear pneumatic actuator 8 is a cylinder, and its cylinder body is fixed to the left beam of the bracket 5 by bolts. The free end of the piston rod is welded to the positioning plate. The movement trajectory of the piston rod of the linear pneumatic actuator 8 is parallel to the top surface of the supporting positioning plate 3, ensuring that the positioning plate remains horizontal during movement and can stably perform lateral compression positioning of the workpiece 12 to be tested.

[0020] The top of the bracket 5 is fixedly mounted with an upper sealing assembly 6 and an air inlet pipe 7 via a cross-shaped structure. The upper sealing assembly 6 includes an upper cover plate and four sets of linear pneumatic actuators 8, which are circular in shape. Their diameter is 20mm larger than the diameter of the upper opening of the workpiece 12 under test, thus completely covering the upper opening of the workpiece 12 under test and providing sufficient coverage area for sealing operations. The four sets of linear pneumatic actuators 8 are all cylinders, which are evenly distributed along the circumference of the upper cover plate at the four ends of the cross-shaped structure. The top of the cylinders of the four sets of linear pneumatic actuators 8 are fixed to the top crossbeam of the bracket 5 with bolts. This symmetrical distribution ensures that the upper cover plate is subjected to uniform force during up and down movement, avoiding tilting and ensuring the sealing plug and the workpiece under test are properly aligned. The upper opening of the workpiece 12 is precisely fitted; a sealing plug is fixed at the bottom of the upper cover plate. The sealing plug is made of silicone rubber material, which can tightly fit the edge of the upper opening of the workpiece 12 under compression, effectively preventing gas leakage; the air outlet of the air inlet pipe 7 passes through the central hole of the upper cover plate and extends into the interior of the workpiece 12 under test. The other end is the air inlet, which is connected to the external compressed air source and pressure test pipeline. The air inlet pipe 7 is also equipped with a pressure sensor interface, which can be connected to a high-precision pressure sensor to monitor the air pressure change inside the workpiece 12 under test in real time. By observing the reading of the pressure sensor, the operator can determine whether there is a leakage problem in the workpiece 12 under test, providing accurate data support for leak detection.

[0021] The bottom of the top platform of the movable base 1 is equipped with a lower sealing assembly 10 via a bracket plate. The lower sealing assembly 10 has a similar structure to the upper sealing assembly 6 and is used to seal the bottom opening of the workpiece 12 to be tested. It includes a lower cover plate and a set of linear pneumatic actuators. The lower cover plate has a circular structure and its diameter matches the diameter of the bottom opening of the workpiece 12 to be tested. The linear pneumatic actuators are installed at the bottom of the platform of the movable base 1. The free end of the piston rod is welded to the bottom of the lower cover plate. The linear pneumatic actuators drive the lower cover plate to move up and down. When it moves upward, the top surface of the lower cover plate tightly fits the edge of the bottom opening of the workpiece 12 to be tested, thereby achieving a bottom seal. Together with the upper sealing assembly 6, it forms a fully enclosed space for the workpiece 12 to be tested, ensuring the accuracy of leak detection.

[0022] See Figure 1 The method of using the push-pull type grounding housing leak detection fixture in this embodiment is as follows: First, the operator pushes the fixture to the designated testing position on the production site, and then locks the casters to fix the fixture position; next, pushes the support positioning plate 3 to move back and forth along the inverted V-shaped guide rail 2, adjusts it to a suitable position, and then tightens the bolts 11 to fix the support positioning plate 3; then, the lower part of the workpiece to be tested 12 is passed through the positioning hole in the middle of the support positioning plate 3 from top to bottom, so that the bottom of the workpiece to be tested 12 is placed at the corresponding position on the movable base 1 platform, at which time the right side of the workpiece to be tested 12 is in close contact with the vertical plate of the right positioning component 9; the air source switch of the left positioning component 4 is activated, and the piston rods of the three sets of linear pneumatic actuators 8 extend synchronously, driving the positioning plate to move towards the workpiece to be tested 12 until the positioning plate is in close contact with the left side wall of the workpiece to be tested 12, completing the all-round positioning of the workpiece to be tested 12; then, the air source switches of the upper sealing component 6 and the lower sealing component 10 are activated respectively, and the four sets of linear pneumatic actuators 8 of the upper sealing component 6 drive the upper cover plate to move downward, so that the bottom The sealing plug tightly blocks the upper opening of the workpiece 12 under test. At the same time, the two sets of linear pneumatic actuators 8 of the lower sealing assembly 10 drive the lower cover plate to move upward, blocking the bottom opening of the workpiece 12 under test, thus achieving a complete seal of the workpiece 12 under test. Compressed air is injected into the workpiece 12 under test through the air inlet pipe 7. After the air pressure stabilizes, the air inlet valve is closed, and the pressure sensor interface is connected to monitor the air pressure change inside the workpiece 12 under test in real time. If the air pressure remains stable within 30 minutes without significant drop, it indicates that the workpiece 12 under test has good sealing performance and meets the requirements. If the air pressure drops, it indicates that the workpiece 12 under test has a leak and needs to be marked and repaired. After the test is completed, the exhaust valve is opened to release the gas inside the workpiece 12 under test. Then, the linear pneumatic actuators 8 are started in reverse to reset the positioning plate of the left positioning assembly 4, move the upper cover plate of the upper sealing assembly 6 upward, and move the lower cover plate of the lower sealing assembly 10 downward. Finally, the workpiece 12 under test is removed from the positioning hole of the support positioning plate 3, and the next workpiece can be tested.

Claims

1. A push-pull type grounding housing leak detection fixture, characterized in that, It includes a movable base (1), a support positioning plate (3), a bracket (5), an upper sealing assembly (6), an air inlet pipe (7), and a lower sealing assembly (10). The support positioning plate (3) is connected to the platform on the upper part of the movable base (1) by cooperating with the inverted V-shaped guide rail (2). The middle part is provided with a positioning hole, and the right side of the support positioning plate (3) is provided with a right positioning piece (9). The upper part of the movable base (1) is connected to the bracket (5), the left side of the bracket (5) is connected to the left positioning component (4), and the top is connected to the sealing component (6) and the air inlet pipe (7); the left positioning component (4) includes a linear pneumatic actuator (8) mounted on the bracket (5) and a positioning plate connected to the free end of the pneumatic actuator (8); The upper sealing assembly (6) includes an upper cover plate, which is driven to move up and down by a linear pneumatic actuator (8) vertically mounted on the top of the bracket (5). The outlet of the air inlet pipe (7) passes through the upper cover plate and faces the inside of the workpiece (12) to be tested. The air inlet is connected to the air source and pressure test pipeline. The bottom of the top platform of the movable base (1) is provided with a lower sealing assembly (10), which includes a lower cover plate, which is driven to move up and down by a linear pneumatic actuator (8) vertically mounted at the bottom of the top platform of the movable base (1).

2. The push-pull type grounding housing leak detection fixture according to claim 1, characterized in that, The upper cover plate is a circular plate, and the upper sealing assembly (6) includes four sets of linear pneumatic actuators (8). The four sets of linear pneumatic actuators (8) are evenly distributed along the circumference of the upper cover plate and are fixed by a cross.

3. The push-pull type grounding housing leak detection fixture according to claim 1, characterized in that, The left positioning component (4) is provided in three groups, and the three groups of left positioning components (4) are arranged in a linear array.

4. The push-pull type grounding housing leak detection fixture according to claim 1, characterized in that, The support positioning plate (3) and the platform on the upper part of the movable base (1) are fixed by a connector (11). The connector (11) is a bolt. The front side of the support positioning plate (3) and the upper platform of the movable base (1) is provided with a nut that cooperates with the bolt.

5. The push-pull type grounding housing leak detection fixture according to claim 1, characterized in that, The right positioning component (9) includes a vertical plate with a reinforcing rib on the outside.

6. The push-pull type grounding housing leak detection fixture according to claim 1, characterized in that, The bottom of the upper cover plate is provided with a sealing plug, which is made of elastic and wear-resistant material.

7. The push-pull type grounding housing leak detection fixture according to claim 1, characterized in that, The movable base (1) is equipped with casters at the bottom.

8. The push-pull type grounding housing leak detection fixture according to claim 1, characterized in that, The air inlet pipe (7) is equipped with a pressure sensor interface, which facilitates the connection of pressure detection equipment to monitor the air pressure changes inside the workpiece (12) in real time.

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