A manual air tightness measuring device

Abstract

The utility model discloses a kind of manual airtightness measuring equipment, including support, sealing assembly, workpiece seat and airtightness detector, workpiece seat is detachably installed on support, sealing assembly is set in the top of workpiece seat, airtightness detector is connected with workpiece seat, the end of workpiece is sealed by sealing assembly, the other end is connected with airtightness detector by workpiece seat;Workpiece cavity that is cooperated with product is concave in workpiece seat;The utility model sets mounting seat and sealing assembly, mounting seat connects airtightness detector, and the airtightness of workpiece is detected. Cylinder selects double-acting cylinder, cooperates with reversing valve to make cylinder temporarily lose power, facilitate to move plug manually to the through hole of workpiece. Plug is connected with cylinder by floating assembly, can effectively avoid not sealing due to workpiece position deviation, cause false detection.

Description

Technical Field

[0001] This utility model relates to airtightness testing, and in particular to a manual airtightness measuring device. Background Technology

[0002] During the production of automotive parts, it is necessary to test the airtightness of the parts to determine whether any leakage has occurred, thereby ensuring their quality and normal function.

[0003] For some smaller parts, assembly and hole sealing are very difficult. Even slight deviations in the sealing components can prevent the holes from being sealed. Therefore, it is necessary to improve the airtightness testing equipment to meet different testing requirements. Utility Model Content

[0004] To address the shortcomings of the existing technology, the main objective of this utility model is to overcome these deficiencies and disclose a manual airtightness measuring device, comprising a support, a sealing assembly, a workpiece seat, and an airtightness tester. The workpiece seat is detachably mounted on the support, the sealing assembly is disposed above the workpiece seat, and the airtightness tester is connected to the workpiece seat. One end of the workpiece is sealed by the sealing assembly, and the other end is connected to the airtightness tester through the workpiece seat. The workpiece seat has a recessed workpiece cavity that mates with the product.

[0005] The sealing assembly includes a cylinder, a floating assembly, and a plug. The cylinder is fixedly mounted on the bracket, and the plug is disposed on the piston rod of the cylinder via the floating assembly. The cylinder drives the plug to move up and down.

[0006] Furthermore, the floating assembly includes a ball head and a connecting block, the plug is disposed on the connecting block, a floating cavity is disposed within the connecting block, and the ball head is disposed within the floating cavity and connected to the cylinder.

[0007] Furthermore, the connecting block has a horizontal through hole to form the floating cavity, and the upper surface of the connecting block has a first connecting hole that communicates with the floating cavity. The size of the first connecting hole is larger than the size of the piston rod of the cylinder and smaller than the size of the ball head.

[0008] Furthermore, the ball head is connected to the cylinder by a thread or a tight fit.

[0009] Furthermore, the plug includes a connecting part and a sealing part, the connecting part being installed with the floating component, and the sealing part having a spherical structure.

[0010] Furthermore, the cylinder is a double-acting cylinder.

[0011] Furthermore, the cylinder is connected to the air source via a reversing valve.

[0012] Furthermore, the plug is threaded or tightly fitted with the floating component.

[0013] Furthermore, it also includes a calibration component for calibrating the downforce of the cylinder.

[0014] Furthermore, the calibration components include a pressure gauge and a digital display.

[0015] The beneficial effects achieved by this utility model are as follows:

[0016] This invention features a mounting base and a sealing assembly. The mounting base connects to an airtightness testing instrument to perform airtightness testing on the workpiece. A double-acting cylinder is selected, and a reversing valve is used to temporarily de-energize the cylinder, facilitating manual movement of the plug to the through-hole of the workpiece. The plug is connected to the cylinder via a floating assembly, effectively preventing incomplete sealing and false detections due to workpiece misalignment. Attached Figure Description

[0017] Figure 1 This is a structural diagram of a product;

[0018] Figure 2 This is a schematic diagram of the structure of a manual airtightness measuring device according to the present invention;

[0019] Figure 3 for Figure 2 Enlarged view of A in the middle;

[0020] Figure 4 This is a cross-sectional view of a manual airtightness measuring device according to the present invention;

[0021] Figure 5 for Figure 4 Enlarged view of A in the middle;

[0022] Figure 6 This is a schematic diagram of a calibration component used in a manual airtightness measuring device according to the present invention;

[0023] The attached figures are labeled as follows:

[0024] 1. Bracket, 2. Sealing assembly, 3. Workpiece seat, 4. Calibration assembly, 21. Cylinder, 22. Floating assembly, 23. Plug, 24. Connector, 221. Ball head, 222. Connecting block, 223. Floating cavity, 231. Connecting part, 232. Sealing part, 31. Workpiece cavity, 41. Pressure gauge, 42. Digital display. Detailed Implementation

[0025] 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 embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0026] like Figure 1 The diagram shows a schematic structure of the product, which is cylindrical in shape with a through hole running through it axially.

[0027] A manual airtightness measuring device, such as Figures 2-6 As shown, the device includes a bracket 1, a sealing assembly 2, a workpiece seat 3, and an airtightness tester (not shown). The workpiece seat 3 is detachably mounted on the bracket 1. The sealing assembly 2 is positioned above the workpiece seat 3. The airtightness tester is connected to the workpiece seat 3. One end of the workpiece is sealed by the sealing assembly 2, and the other end is connected to the airtightness tester through the workpiece seat 3. The workpiece seat 3 has a recessed workpiece cavity 31 that mates with the product. The product is positioned through the workpiece cavity 31.

[0028] The sealing assembly 2 includes a cylinder 21, a floating assembly 22, and a plug 23. The cylinder 21 is fixedly mounted on the bracket 1, and the plug 23 is mounted on the piston rod of the cylinder 21 via the floating assembly 22. The cylinder 21 drives the plug 23 to move up and down. After the workpiece is placed in the workpiece cavity 31, the cylinder 21 drives the plug 23 to move downward, and the pressure of the cylinder 21 seals the upper opening of the workpiece. Then, an airtightness tester pressurizes the workpiece and measures whether the pressure changes, thus reflecting the airtightness test result.

[0029] In one embodiment, such as Figures 2-6 As shown, the floating assembly 22 includes a ball head 221 and a connecting block 222. A plug 23 is disposed on the connecting block 222. A floating cavity 223 is disposed inside the connecting block 222. The ball head 221 is disposed inside the floating cavity 223 and connected to the cylinder 21.

[0030] Specifically, the connecting block 222 has a through hole to form a floating cavity 223. The upper surface of the connecting block 222 has a first connecting hole axially connected to the floating cavity 223. The size of the first connecting hole is larger than the size of the piston rod of the cylinder 21 but smaller than the size of the ball head 221. During assembly, the ball head 221 is inserted into the floating cavity 223 through the horizontally arranged through hole of the connecting block 222. The piston rod of the cylinder 21 passes through the first connecting hole and connects with the ball head 221, thereby floatingly connecting the connecting block 222 and the cylinder 21. The horizontal position of the plug 23 can be slightly adjusted. In this embodiment, the connecting block 222 has an overall cylindrical structure with a radially arranged through hole to form the floating cavity 223.

[0031] In the above embodiments, such as Figures 2-6As shown, the ball head 221 and the cylinder 21 are connected by threads or a tight fit. Specifically, the ball head 221 has a second connecting hole, which is tightly fitted with the cylinder 21. Alternatively, the second connecting hole has an internal thread, and the piston rod of the cylinder 21 has an external thread that mates with it, thus enabling a threaded connection between the cylinder 21 and the ball head 221.

[0032] In one embodiment, such as Figures 2-6 As shown, the plug 23 includes a connecting part 231 and a sealing part 232. The connecting part 231 is installed with the floating assembly 22, and the sealing part 232 has a spherical structure. This spherical structure allows for sealing of the workpiece even after fine adjustments to the horizontal position.

[0033] In one embodiment, such as Figures 2-6 As shown, cylinder 21 is a double-acting cylinder. Preferably, cylinder 21 is connected to an air source via a reversing valve (not shown). The reversing valve controls the air source input, controlling the piston rod of cylinder 21 to extend and retract; alternatively, after both air ports of the cylinder are disconnected from the air source and connected to the atmosphere, the piston rod can be manually driven to move. During workpiece installation, after placing the workpiece on the workpiece seat 3, the lower end of the workpiece through hole is connected to the air port in the workpiece seat 3, and the air port is connected to an airtightness tester. The plug 23 is moved downwards by manual drive to place the sealing part 232 at the upper end of the workpiece, ensuring that the sealing part 232 is accurately positioned at the upper opening of the workpiece. Then, cylinder 21 is activated to press the sealing part 232 onto the workpiece.

[0034] In one embodiment, such as Figures 2-6 As shown, the plug 23 is threaded or tightly fitted to the floating component 22. Specifically, a third connecting hole is provided at the lower end of the connecting block 222, and a connecting member 24 is provided inside the connecting hole. A third connecting hole is also provided on the connecting member 24, and the plug 23 is tightly fitted or threaded to the third connecting hole. In this embodiment, the connecting member 24 is clearance fitted to the connecting hole, so that the connecting member 24 can move axially along the third connecting hole. The connecting member 24 has a stepped structure, so that after the connecting member 24 and the connecting block 222 are assembled, a lower limit position is provided; that is, the connecting member 24 cannot pass axially downward through the third connecting hole.

[0035] In one embodiment, such as Figures 2-6 As shown, it also includes a calibration component 4, which calibrates the downforce of cylinder 21.

[0036] In the above embodiments, such as Figures 2-6As shown, the calibration component 4 includes a pressure gauge 41 and a digital display 42. In use, the pressure gauge 41 is placed on the bracket 1 and located below the plug 23. The cylinder 21 drives the plug 23 to move downward and act on the pressure gauge 41. The pressure value of the digital display 42 is read, and then the force of the cylinder 21 is adjusted so that the pressure value of the sealing workpiece is within the specified range.

[0037] When using this utility model, such as Figures 2-6 As shown, after placing the calibration component 4 on the support 1, the downward pressure of the sealing component 2 is calibrated. Then, the calibration component 4 is removed, the workpiece seat 3 is placed on the support 1, and the workpiece seat 3 is connected to the airtightness tester. After completion, the workpiece is placed in the workpiece cavity 31, and the plug 23 is pulled down so that the plug 23 contacts the through hole of the workpiece. Then, the equipment is started, and the cylinder 21 applies pressure to the plug 23. Gas at a set pressure is introduced into the workpiece through the airtightness tester. After a certain period of stillness, the pressure is measured. The difference between the measured pressure value and the initial pressure value is considered within a specified range. If it is, the airtightness is good; otherwise, the airtightness is poor. After the test is completed, the cylinder 21 is reset.

[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of implementation of the present utility model. Any modifications or equivalent substitutions to the present utility model without departing from the spirit and scope thereof should be covered within the protection scope of the claims of the present utility model.

Claims

1. A manual airtightness measuring device, characterized in that, The device includes a bracket, a sealing assembly, a workpiece seat, and an airtightness tester. The workpiece seat is detachably mounted on the bracket. The sealing assembly is positioned above the workpiece seat. The airtightness tester is connected to the workpiece seat. One end of the workpiece is sealed by the sealing assembly, and the other end is connected to the airtightness tester through the workpiece seat. The workpiece seat has a recessed workpiece cavity that mates with the product. The sealing assembly includes a cylinder, a floating assembly, and a plug. The cylinder is fixedly mounted on the bracket, and the plug is disposed on the piston rod of the cylinder via the floating assembly. The cylinder drives the plug to move up and down.

2. The manual airtightness measuring device according to claim 1, characterized in that, The floating assembly includes a ball head and a connecting block. The plug is disposed on the connecting block, and a floating cavity is provided inside the connecting block. The ball head is disposed inside the floating cavity and connected to the cylinder.

3. The manual airtightness measuring device according to claim 2, characterized in that, The connecting block has a horizontal through hole to form the floating cavity. The upper surface of the connecting block has a first connecting hole that communicates with the floating cavity. The size of the first connecting hole is larger than the size of the piston rod of the cylinder and smaller than the size of the ball head.

4. The manual airtightness measuring device according to claim 2, characterized in that, The ball head is connected to the cylinder by a thread or a tight fit.

5. A manual airtightness measuring device according to claim 1, characterized in that, The plug includes a connecting part and a sealing part. The connecting part is installed with the floating component, and the sealing part is a spherical structure.

6. The manual airtightness measuring device according to claim 1, characterized in that, The cylinder is a double-acting cylinder.

7. A manual airtightness measuring device according to claim 6, characterized in that, The cylinder is connected to the air source via a reversing valve.

8. A manual airtightness measuring device according to claim 1, characterized in that, The plug is threaded or tightly fitted to the floating component.

9. A manual airtightness measuring device according to claim 1, characterized in that, It also includes a calibration component, through which the downforce of the cylinder is calibrated.

10. A manual airtightness measuring device according to claim 9, characterized in that, The calibration components include a pressure gauge and a digital display.

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