Air tightness detection device

Abstract

The utility model belongs to the technical field of pipeline detection devices, and discloses an air tightness detection device, which comprises a timing module, an air path module and a circuit module, the air path module comprises an air distribution device and a plurality of test paths, and the circuit module comprises a plurality of electromagnetic valves and a digital display pressure gauge. The plurality of electromagnetic valves and the digital display pressure gauges are respectively arranged in each test channel, the electromagnetic valves are used for controlling the on-off of air channels of the test channels, the digital display pressure gauges are used for displaying air pressure values of the test channels, and the timing module is used for timing after the test channels are ventilated. According to the utility model, the existing airtightness comprehensive tester on the market is simplified, the designed gas circuit and circuit structure can meet the basic pipeline test requirements, the scheme also comprises a plurality of groups of detection channels, each group of detection channels is equipped with a digital pressure gauge and is independently controlled by a group of switches and electromagnetic valves without mutual interference, and the detection efficiency is improved. The electronic timer is controlled by the switch, timing is started when the switch is pressed during detection, and the detection time is controlled by the timer.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline detection devices, and in particular relates to an airtightness detection device. Background Art

[0002] Air tightness testing is widely used in various industries, such as automotive parts, electronic products, aerospace, medical devices, food packaging and other industries. They have strict requirements on air tightness. It is related to the performance and safety of the product, so it is very important to conduct air tightness testing before the product leaves the factory.

[0003] Air tightness testing usually selects appropriate testing methods based on the product's use environment and intended use. Positive pressure testing usually uses compressed air to inflate the product and test the air pressure leakage value at the product output end; negative pressure testing usually uses a negative pressure pump to evacuate the product and test the air pressure leakage value at the product output end.

[0004] The air tightness comprehensive testers currently on the market are highly intelligent, integrating display controllers, sensors, analysis software, etc., with high integration and accurate test results. However, due to the high functional integration, the price of such air tightness comprehensive testers is often high. Taking the four-channel air tightness tester as an example, the price of the ordinary precision model is about more than 20,000 yuan, which is costly for small production enterprises. If the user does not have high requirements for the use function and accuracy, these instruments are not very cost-effective. Utility Model Content

[0005] The utility model aims to provide an airtightness detection device to solve the above-mentioned technical problems.

[0006] In order to achieve the above-mentioned purpose, the specific technical scheme of an airtightness detection device of the utility model is as follows:

[0007] An air tightness detection device includes a timing module, an air circuit module and a circuit module. The air circuit module includes an air distribution device and a multi-path test path. The circuit module includes multiple solenoid valves and multiple digital pressure gauges. The multiple solenoid valves and multiple digital pressure gauges are respectively arranged in each test path. The solenoid valves are used to control the on-off of the air path of the test path. The digital pressure gauges are used to display the air pressure value of the test path. The timing module is used to control the detection time.

[0008] Furthermore, it includes a power supply module, which includes a DC power supply and a power switch, the DC power supply is connected to the power switch, and the DC power supply is connected to the circuit module, and the power supply of the circuit module is controlled by the power switch.

[0009] Furthermore, the timing module includes a timer switch and an electronic timer, the timer switch is connected to the electronic timer, and the timer switch is used to control the on and off of the electronic timer.

[0010] Furthermore, the air distribution device is provided with a pneumatic quick connector and a plurality of throttle valves, the pneumatic quick connector is connected to a compressed air source via an air pipe; the plurality of throttle valves are respectively connected to multi-path test passages.

[0011] Furthermore, each test path includes a test air pipe and a test connector, and the circuit module also includes multiple solenoid valve switches and three-way quick connectors. The multiple solenoid valve switches are respectively connected in series with the multiple solenoid valves, and the multiple solenoid valve switches are connected in parallel. The positive and negative poles of the parallel solenoid valve switches are connected to the power switch. The throttle valve is connected to the air inlet of the corresponding solenoid valve through the test air pipe, and the air outlet of the solenoid valve is respectively connected to the air inlet of the corresponding three-way quick connector through the test air pipe. The air outlet one of the three-way quick connector is respectively connected to the corresponding digital pressure gauge, and the air outlet two of the three-way quick connector is respectively connected to the test connector through the test air pipe.

[0012] Furthermore, it also includes a chassis, which includes a front panel, a rear panel, a left panel, a right panel, an upper panel, a lower panel and support feet. The front panel, the rear panel, the left panel, the right panel, the upper panel and the lower panel are surrounded by six panels to form a square box body. The support feet are fixedly installed at the four corners below the lower panel to support the entire device.

[0013] Furthermore, the front panel has a timer hole, a timer switch hole, a power switch hole, a pressure gauge hole, a solenoid valve switch hole, and a test connector hole. The timer hole is used to expose the display screen of the electronic timer, the timer switch hole is used to expose the timer switch, the power switch hole is used to expose the power switch, the pressure gauge hole is used to expose the display screen of the digital pressure gauge, the solenoid valve switch hole is used to expose the solenoid valve switch, and the test connector hole is used to expose the test connector.

[0014] Furthermore, the left panel and the right panel are provided with ventilation holes for heat dissipation of the device.

[0015] Furthermore, the test passage includes a silicone wire sleeve, and the rear panel is provided with a hole for an air distributor and a hole for a silicone wire sleeve. The hole for the air distributor is used to fix the air distributor on the rear panel, and a silicone wire sleeve is arranged on the hole for the silicone wire sleeve. After the test air pipe is connected to the air distributor, it is introduced into the interior of the chassis through the silicone wire sleeve.

[0016] Furthermore, the test paths are provided with four paths, and the circuit modules are also provided with four paths accordingly.

[0017] An air tightness detection device of the utility model has the following advantages: the utility model simplifies the existing air tightness comprehensive testers on the market, selects low-cost electronic components and gas path components that meet basic functions, and the designed gas path and circuit structure can meet basic pipeline testing needs. The solution also includes multiple groups of detection channels, each group of detection channels is equipped with a digital pressure gauge and is independently controlled by a group of switches and solenoid valves without interfering with each other. The solution also includes an electronic timer, which is also controlled by a switch. When detecting, pressing the timer switch starts timing, and the detection time is controlled by the electronic timer.

[0018] This device can be used for positive pressure air tightness testing and negative pressure air tightness testing. It has a wide range of applications, simple operation, and low cost. Compared with the ordinary four-channel air tightness tester on the market, its price has dropped by 90%, greatly saving the company's procurement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the disassembled structure of the airtightness detection device of the utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of the air tightness detection device of the utility model;

[0021] Figure 3 It is a top view of the air tightness detection device of the utility model;

[0022] Explanation of the marks in the figure: 11. DC power supply; 12. Power switch; 21. Timer switch; 22. Electronic timer; 31. Air distributor; 311. Pneumatic quick connector; 312. Throttle valve; 32. Test passage; 321. Silicone grommet; 322. Test air pipe; 323. Test connector; 41. Solenoid valve switch; 42. Solenoid valve; 43. Digital pressure gauge; 44. Three-way quick connector; 51. Front panel; 511. Timer hole; 512. Timer switch hole; 513. Power switch hole; 514. Pressure gauge hole; 515. Solenoid valve switch hole; 516. Test connector hole; 52. Rear panel; 521. Air distributor hole; 522. Silicone grommet hole; 53. Left panel; 531. Air vent; 54. Right panel; 55. Upper panel; 56. Lower panel; 57. Support foot. DETAILED DESCRIPTION

[0023] In order to better understand the purpose, structure and function of the utility model, the air tightness detection device of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0024] like Figure 1-3As shown, an air tightness detection device of the utility model includes a chassis, a power module, a timing module, a gas circuit module and a circuit module, wherein the power module, the timing module, the gas circuit module and the circuit module are arranged in the chassis, the power module is used to supply power to the timing module and the circuit module, the gas circuit module includes a gas distribution device 31 and a multi-channel test path 32, the multi-channel test path 32 is connected to the gas distribution device 31, and the circuit module is respectively connected to the multi-channel test path 32, and is used to control the on and off of the test path and display the air pressure of the test path. The timing module is used to control the detection time.

[0025] The power module includes a DC power supply 11 and a power switch 12 . The DC power supply 11 is connected to the power switch 12 . The DC power supply 11 is connected to the circuit module. The power supply of the circuit module is controlled by the power switch 12 .

[0026] The timing module includes a timer switch 21 and an electronic timer 22. The timer switch 21 is connected to the electronic timer 22. The timer switch 21 is used to control the on and off of the electronic timer.

[0027] The air distribution device 31 of the air circuit module has a pneumatic quick connector 311 and multiple throttle valves 312. The pneumatic quick connector 311 is connected to the compressed air source through an air pipe; the multiple throttle valves 312 are respectively connected to the multiple test passages 32; each test passage 32 includes a silicone wire sheath 321, a test air pipe 322 and a test connector 323.

[0028] The circuit module includes multiple solenoid valve switches 41, solenoid valves 42, digital pressure gauges 43 and three-way quick connectors 44. Multiple solenoid valves 42 are respectively arranged in each test passage 32 to control the on-off of the gas circuit of the test passage 32. Specifically, multiple solenoid valve switches 41 are respectively connected in series with multiple solenoid valves 42, and then multiple solenoid valve switches 41 are connected in parallel. Finally, the positive and negative poles of the parallel solenoid valve switches 41 are connected to the power switch 12, the throttle valve 312 is connected to the corresponding air inlet of the solenoid valve 42 through the test air pipe 322, the air outlet of the solenoid valve 42 is respectively connected to the air inlet of the corresponding three-way quick connector 44 through the test air pipe 322, the air outlet one of the three-way quick connector 44 is respectively connected to the corresponding digital pressure gauge 43, and the air outlet two of the three-way quick connector 44 is respectively connected to the test connector 323 through the test air pipe 322. The solenoid valve switch 41 is used to control the solenoid valve 42, and the throttle valve 312 is used to control the air pressure of the test passage 32. When the solenoid valve switch 41 is powered on, the solenoid valve 42 is opened and the test passage 32 is ventilated; when the solenoid valve switch 41 is powered off, the solenoid valve 42 is closed and the test passage 32 is cut off from air. The digital pressure gauge 43 is used to display the air pressure value of the test passage 32.

[0029] The chassis includes a front panel 51, a rear panel 52, a left panel 53, a right panel 54, an upper panel 55, a lower panel 56 and support feet 57. The front panel 51, the rear panel 52, the left panel 53, the right panel 54, the upper panel 55 and the lower panel 56 form a square box. The support feet 57 are fixedly installed at the four corners below the lower panel 56 to support the entire device. The left panel 53 and the right panel 54 are provided with air vents 531 for heat dissipation of the device. The front panel 51 has a timer hole 511, a timer switch hole 512, a power switch hole 513, a pressure gauge hole 514, a solenoid valve switch hole 515, and a test connector hole 516. The timer hole 511 is used to expose the display screen of the electronic timer 22, the timer switch hole 512 is used to expose the timer switch 21, the power switch hole 513 is used to expose the power switch 12, the pressure gauge hole 514 is used to expose the display screen of the digital pressure gauge 43, the solenoid valve switch hole 515 is used to expose the solenoid valve switch 41, and the test connector hole 516 is used to expose the test connector 323. The rear panel 52 has a gas distributor hole 521 and a silicone sheath hole 522. The gas distributor hole 521 is used to fix the gas distributor 31, and the silicone sheath hole 522 is provided with a silicone sheath 321. After the test gas pipe 322 is connected to the gas distributor 31, it is introduced into the chassis through the silicone sheath 321.

[0030] In this embodiment, four test paths 32 are provided, and four circuit modules are also provided correspondingly.

[0031] Working principle:

[0032] The electronic timer is set with the timing time in advance, and the digital pressure gauge is set with the threshold value in advance. When testing, turn on the power switch, confirm that the digital pressure gauge displays normally, connect the product to the test connector, press the solenoid valve switch, the solenoid valve is energized and opened, and the product begins to inflate. When the air pressure reaches the set value, press the solenoid valve switch again, the solenoid valve is powered off and closed. At this time, press the timer switch to start timing, and when the timing ends, observe the displayed air pressure value. If the air pressure value is within the set range, the digital pressure gauge will display green. If the air pressure leaks and exceeds the set range, the digital pressure gauge will display red.

[0033] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. An air tightness detection device, comprising a timing module, an air path module and a circuit module, characterized in that: The gas circuit module comprises a gas distribution device (31) and a multi-channel test channel (32); the circuit module comprises a plurality of solenoid valves (42) and a plurality of digital pressure gauges (43); the plurality of solenoid valves (42) and the plurality of digital pressure gauges (43) are respectively arranged in each test channel (32); the solenoid valves (42) are used to control the on-off of the gas circuit of the test channel (32); the digital pressure gauges (43) are used to display the gas pressure value of the test channel (32); and the timing module is used to control the detection time.

2. The airtightness detection device according to claim 1, characterized in that: The invention comprises a power supply module, wherein the power supply module comprises a direct current power supply (11) and a power switch (12), wherein the direct current power supply (11) is connected to the power switch (12), and the direct current power supply (11) is connected to the circuit module, and the power supply of the circuit module is controlled by the power switch (12).

3. The airtightness detection device according to claim 1, characterized in that: The timing module comprises a timer switch (21) and an electronic timer (22); the timer switch (21) is connected to the electronic timer (22); and the timer switch (21) is used to control the on and off of the electronic timer (22).

4. The airtightness detection device according to claim 2, characterized in that: The gas distribution device (31) is provided with a pneumatic quick connector (311) and a plurality of throttle valves (312); the pneumatic quick connector (311) is connected to a compressed air source via an air pipe; and the plurality of throttle valves (312) are respectively connected to the multi-path test passages (32).

5. The airtightness detection device according to claim 4, characterized in that: Each test passage (32) comprises a test air pipe (322) and a test connector (323); the circuit module further comprises a plurality of solenoid valve switches (41) and a three-way quick connector (44); the plurality of solenoid valve switches (41) are respectively connected in series with the plurality of solenoid valves (42); the plurality of solenoid valve switches (41) are connected in parallel; the positive and negative electrodes of the parallel-connected solenoid valve switches (41) are connected to a power switch (12); the throttle valve (312) is connected to the air inlet of the corresponding solenoid valve (42) through the test air pipe (322); the air outlet of the solenoid valve (42) is respectively connected to the air inlet of the corresponding three-way quick connector (44) through the test air pipe (322); the air outlet 1 of the three-way quick connector (44) is respectively connected to the corresponding digital pressure gauge (43); and the air outlet 2 of the three-way quick connector (44) is respectively connected to the test connector (323) through the test air pipe (322).

6. The airtightness detection device according to claim 5, characterized in that: The device also includes a chassis, which includes a front panel (51), a rear panel (52), a left panel (53), a right panel (54), an upper panel (55), a lower panel (56) and support feet (57). The front panel (51), the rear panel (52), the left panel (53), the right panel (54), the upper panel (55) and the lower panel (56) are combined to form a square box body. The support feet (57) are fixedly installed at the four corners below the lower panel (56) to support the entire device.

7. The airtightness detection device according to claim 6, characterized in that: The front panel (51) has a timer hole (511), a timer switch hole (512), a power switch hole (513), a pressure gauge hole (514), a solenoid valve switch hole (515), and a test connector hole (516). The timer hole (511) is used to expose a display screen of an electronic timer, the timer switch hole (512) is used to expose a timer switch, the power switch hole (513) is used to expose a power switch, the pressure gauge hole (514) is used to expose a display screen of a digital pressure gauge, the solenoid valve switch hole (515) is used to expose a solenoid valve switch (41), and the test connector hole (516) is used to expose a test connector (323).

8. The airtightness detection device according to claim 6, characterized in that: The left panel (53) and the right panel (54) are provided with ventilation holes (531) for heat dissipation of the device.

9. The airtightness detection device according to claim 6, characterized in that: The test passage comprises a silicone wire sheath (321); the rear panel (52) is provided with a gas distribution device hole (521) and a silicone wire sheath hole (522); the gas distribution device hole (521) is used to fix the gas distribution device (31) on the rear panel (52); the silicone wire sheath hole (522) is provided with a silicone wire sheath (321); and the test gas pipe (322) is connected to the gas distribution device (31) and then introduced into the interior of the chassis through the silicone wire sheath (321).

10. The airtightness detection device according to claim 1, characterized in that: The test paths (32) are provided with four paths, and the circuit modules are also provided with four paths accordingly.

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