Improved air tightness test tool

Abstract

The improved air tightness test tool comprises an air inlet processing device which is used for dehumidifying air; the air inlet end part of the downward pressing type detection device is connected with the air outlet end part of the air inlet treatment device through an air pipe; the downward pressing type detection device comprises a base and a downward pressing assembly. A workpiece placing seat is arranged on the base, the side part of the workpiece placing seat is connected with an air inlet end part and an air outlet end part, a switch is arranged on the air outlet end part, and the switch can be a button; the workpiece placing seat is also connected with an air pressure detection device; and an air cavity is formed in the workpiece placing seat, and is communicated to the air inlet end part, the exhaust end part, the air pressure detection device and a placing position on the workpiece placing seat. The utility model provides an improved air tightness test tool, which is provided with a preposed gas processing device, and is compact in structure, convenient to operate and high in accuracy of detection results.

Description

Technical Field

[0001] This utility model belongs to the technical field of workpiece sealing test device, specifically relating to an improved airtightness test fixture. Background Technology

[0002] In industrial production and scientific research, the airtightness testing of workpieces is a crucial step in ensuring product quality and equipment reliability. Furthermore, with technological advancements, the requirements for workpiece sealing performance are becoming increasingly stringent. Existing technologies for airtightness testing of some workpieces have several shortcomings, such as complex and costly fixtures, cumbersome operation, and the lack of pre-installed air dehumidification devices. These shortcomings lead to low efficiency in workpiece airtightness testing, increased labor and time costs, and the introduction of errors.

[0003] Therefore, based on the above-mentioned situation, this application further designs and improves the airtightness testing fixture for workpieces. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model provides an improved airtightness testing fixture with a pre-positioned gas treatment device. The fixture is also compact, easy to operate, and provides highly accurate test results.

[0005] The present invention is solved by the following technical solution.

[0006] An improved airtightness testing fixture includes: an air intake treatment device for dehumidifying the gas; a pressure-type testing device, wherein the air intake end of the pressure-type testing device and the air outlet end of the air intake treatment device are connected by an air pipe; the pressure-type testing device includes a base and a pressure-type component; a workpiece placement seat is provided on the base, and the side of the workpiece placement seat is connected to an air intake end and an exhaust end, and the exhaust end is provided with a switch, which can be a toggle switch; a pressure detection device is also connected to the workpiece placement seat; an air chamber is provided in the workpiece placement seat, which is connected to the air intake end, the exhaust end, the pressure detection device, and the placement position on the workpiece placement seat. When the workpiece is pressed onto the placement position, the air chamber can be blocked to perform an airtightness test; the pressure-type component is used to apply pressure to the workpiece.

[0007] The airtightness testing fixture in this application is used to test the airtightness of a workpiece placed on a workpiece holder. Specifically, after the workpiece is placed, it is pressed down by a pressing component. Then, an air source (such as an external air pump) delivers gas through an air intake treatment device, which then enters the air intake end through an air pipe. The gas then enters the chamber inside the workpiece holder, where it is exhausted. The gas is pressurized in the chamber for a period of time, and the pressure change during this period is detected by an air pressure detection device to determine whether the workpiece's airtightness is up to standard. The operation is convenient. Furthermore, the gas in this application is treated by the air intake treatment device to eliminate moisture, avoiding the influence of moisture condensation in the chamber on the test results, resulting in high detection accuracy.

[0008] In a preferred embodiment, the pressing component includes a column, and the upper part of the column is provided with an installation structure. The installation structure is provided with a pressing component and a matching operating component. After the pressing component moves down, it can press on the workpiece. The structure has high stability and is easy to operate.

[0009] In a preferred embodiment, the operating element is a pressure wrench, which facilitates one-handed operation.

[0010] In a preferred embodiment, the column is mounted on the base, resulting in a high degree of integration of the overall structure.

[0011] In a preferred embodiment, the air intake treatment device is provided with an air source inlet, a gas dehumidification component, and an air outlet. The gas dehumidification component can be a conventional silica dehumidification device, etc.

[0012] In a preferred embodiment, the air pressure detection end of the air pressure detection device is installed on the side of the workpiece placement seat, so as not to affect the handling of the workpiece.

[0013] In a preferred embodiment, an intermediate component is provided between the exhaust end and the workpiece placement seat, the intermediate component being a capillary standard leakage channel component or a calibrator.

[0014] Compared with the prior art, the present invention has the following advantages: it provides an improved airtightness testing fixture with a front-end gas treatment device, and the testing fixture has a compact structure, is easy to operate, and has high accuracy in test results. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the airtightness testing fixture of this utility model.

[0016] Figure 2 This is a schematic diagram of the pressure-type detection device in this utility model.

[0017] Figure 3 This is a top view of the pressure-type detection device in this utility model. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] In the following embodiments, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this utility model, it should be understood that the terms such as center, longitudinal, transverse, length, width, thickness, upper, lower, front, back, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, and counterclockwise, indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features shown. In the description of this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] See Figures 1 to 3 This utility model relates to an improved airtightness testing fixture, comprising: an air intake treatment device 1 for dehumidifying the gas; a pressure-type testing device 3, wherein the air intake end 35 of the pressure-type testing device 3 is connected to the air outlet end 13 of the air intake treatment device 1 via an air pipe 2; the pressure-type testing device 3 includes a base 31 and a pressure-type component; a workpiece placement seat 39 is provided on the base 31, and the side of the workpiece placement seat 39 is connected to the air intake end 35 and the exhaust end 36, and the exhaust end 36 is provided with a switch 361, which can be a toggle switch; a pressure detection device 6 is also connected to the workpiece placement seat 39; an air chamber is provided in the workpiece placement seat 39, which is connected to the air intake end 35, the exhaust end 36, the pressure detection device 6, and the placement position on the workpiece placement seat 39, and the workpiece 5 can be blocked by pressing it onto the placement position to perform an airtightness test; the pressure-type component is used to apply pressure to the workpiece 5.

[0022] Specifically, as shown in the attached drawings, the pressing assembly includes a column 32, with a mounting structure 321 on its upper part. This mounting structure 321 has a pressing component 34 and a matching operating component 33. The pressing component 34 can press down on the workpiece 5 after being lowered, resulting in high structural stability and convenient operation. In the embodiment shown in the attached drawings, the operating component 33 is a pressing wrench, facilitating one-handed operation. Furthermore, the column 32 is mounted on a base 31, resulting in a high degree of integration of the overall structure.

[0023] In addition, from the appendix Figure 1 As can be seen from the above, the air intake treatment device 1 is equipped with an air source inlet 11, a gas dehumidification component 12, and an air outlet 13. The gas dehumidification component 12 can be a conventional silica dehumidification device, etc.

[0024] The airtightness testing fixture in this application can be used to test high-strength, tough, and weather-resistant bolts.

[0025] In this application, the air pressure detection end 61 of the air pressure detection device 6 is installed on the side of the workpiece placement seat 39, which does not affect the handling of the workpiece 5; an intermediate component 362 is also provided between the exhaust end 36 and the workpiece placement seat 39. The intermediate component 362 is a capillary standard leakage channel component or a calibrator, used for related operations. Specifically, the capillary standard leakage standard of the capillary standard leakage channel component can be 0.3 ml / min, and the calibrator can be a CAL series calibrator, such as model CAL-1.0-B.

[0026] As described above, the airtightness testing fixture in this application is used to test the airtightness of workpiece 5 placed on workpiece placement seat 39. Specifically, after workpiece 5 is placed, it is pressed down by a pressing component. Then, an air source (such as an external air pump) delivers gas through the air intake treatment device 1, then through the air pipe 2 into the air intake end 35, and then into the chamber inside workpiece placement seat 39. At this time, the gas is discharged through the exhaust end 36. The gas is pressurized in the chamber for a period of time. The change in air pressure during this period is detected by the air pressure detection device 6, which can determine whether the airtightness of workpiece 5 is qualified. The operation is convenient. Furthermore, the gas in this application eliminates water vapor after being treated by the air intake treatment device 1, which can avoid the influence of water vapor condensation in the chamber on the test results, resulting in high detection accuracy.

[0027] In a specific embodiment, the pressure sensor in the air pressure detection device 6 can be a PSE540 series pressure sensor. The PSE540 series has a measurement range of 0~1MPa (minimum display 0.001MPa), which can meet the testing requirements. The pressure sensor controller in the air pressure detection device 6 can be a matching PSE300 series. The testing standard in one embodiment is as follows: 30psi=200kPa=0.2MPa, (reference) air pressure 0.1MPa, pressurization to 30psi for 10s, pressure holding for 15s, detection for 17s, the leakage rate of the test result is within 0.3ml / min, the air tightness is qualified, and the leakage rate is calculated as follows: Q (leakage rate) = V volume (ml) × ∆P pressure change (Pa) / 101325 (Pa) × 60 (time conversion) / T (measurement time (sec); V volume is the air chamber volume, which can be 2.6667ml.

[0028] As described above, this utility model provides an improved airtightness testing fixture with a front-mounted gas treatment device. The fixture is also compact, easy to operate, and provides highly accurate test results.

[0029] The scope of protection of this utility model includes, but is not limited to, the above embodiments. The scope of protection of this utility model is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of this utility model.

Claims

1. An improved airtightness testing fixture, characterized in that, include: An air intake treatment device (1) is used to dehumidify the gas; The pressure-type detection device (3) is connected to the air outlet end (13) of the air intake treatment device (1) via an air pipe (2). The pressure-type detection device (3) includes a base (31) and a pressure assembly; The base (31) is provided with a workpiece placement seat (39), and the side of the workpiece placement seat (39) is connected to an air inlet end (35) and an exhaust end (36). The exhaust end (36) is provided with a switch (361), and the workpiece placement seat (39) is also connected to an air pressure detection device (6). The workpiece placement seat (39) is provided with an air chamber, which is connected to the air inlet end (35), the air outlet end (36), the air pressure detection device (6) and the placement position on the workpiece placement seat (39). After the workpiece (5) is pressed on the placement position, the air chamber can be blocked to conduct an airtightness test. The pressing assembly is used to apply pressure to the workpiece (5).

2. The improved airtightness testing fixture according to claim 1, characterized in that, The pressing assembly includes a column (32), and the upper part of the column (32) is provided with an installation structure (321). The installation structure (321) is provided with a pressing component (34) and a matching operating component (33). After the pressing component (34) moves down, it can press on the workpiece (5).

3. The improved airtightness testing fixture according to claim 2, characterized in that, The operating component (33) is a pressure wrench.

4. The improved airtightness testing fixture according to claim 2, characterized in that, The column (32) is mounted on the base (31).

5. The improved airtightness testing fixture according to claim 1, characterized in that, The air intake treatment device (1) is provided with an air source inlet (11), a gas dehumidification component (12), and an air outlet (13).

6. The improved airtightness testing fixture according to claim 1, characterized in that, The air pressure detection end (61) of the air pressure detection device (6) is installed on the side of the workpiece placement seat (39).

7. The improved airtightness testing fixture according to claim 1, characterized in that, An intermediate component (362) is provided between the exhaust end (36) and the workpiece placement seat (39), and the intermediate component (362) is a capillary standard leakage channel component or a calibrator.

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