CN212206510U - Air tightness detection device - Google Patents

Air tightness detection device Download PDF

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Publication number
CN212206510U
CN212206510U CN202021036320.XU CN202021036320U CN212206510U CN 212206510 U CN212206510 U CN 212206510U CN 202021036320 U CN202021036320 U CN 202021036320U CN 212206510 U CN212206510 U CN 212206510U
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China
Prior art keywords
pressure
solenoid valve
cavity
air
pressure transmitter
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CN202021036320.XU
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Chinese (zh)
Inventor
张伟
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Ningbo Jiabaoli Automation Equipment Co ltd
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Ningbo Jiabaoli Automation Equipment Co ltd
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Abstract

The utility model relates to an airtight test technical field especially relates to an air tightness detection device, including first solenoid valve, the second solenoid valve, air supply filter generator and pressure transmitter, air supply filter generator passes through first solenoid valve and is connected with the air supply, pressure transmitter's input passes through the second solenoid valve and is connected with air supply filter generator, be equipped with first regulator between second solenoid valve and the air supply filter generator, a serial communication port, be equipped with the second regulator that is used for carrying out the fine setting to atmospheric pressure between pressure transmitter's the output and the test fixture, the output of second regulator and test fixture's air inlet zonulae occludens, be connected through the gas pipeline between second regulator's input and the pressure transmitter. The problem that the test result is inaccurate due to the fact that the pressure in the cavity is inconsistent with the output pressure of the pressure transmitter caused by bending of the pipeline is effectively solved.

Description

Air tightness detection device
Technical Field
The utility model relates to an airtight test technical field especially relates to an air tightness detection device.
Background
The traditional airtight performance detection method comprises the steps of sealing a product, injecting compressed air into the product, then putting the product into water, manually checking whether bubbles leak or not to perform performance detection, wherein in the method, water can be attached to the surface or the cavity of the product after detection; the detection can cause pollution to the product, and the product is easy to be indirectly corroded. Moreover, the detection process is long in time, and whether the products are qualified or not is judged manually, so that batch detection cannot be carried out, the outgoing quality of each product cannot be guaranteed, and the production efficiency is influenced.
To solve the above problems, an automatic airtightness detector controlled by a solenoid valve is usually used for detection, however, when the detector is used, because the cavity of the test fixture is connected with the pressure transmitter by a pipeline, errors are generated between the pressure in the cavity and the pressure output by the pressure transmitter due to the bending of the pipeline, and the test result is inaccurate.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an air tightness detection device to solve above-mentioned technical problem.
The utility model provides a technical problem can adopt following technical scheme to realize:
the utility model provides an air tightness detection device, includes first solenoid valve, second solenoid valve, test fixture, air supply filter generator and pressure transmitter, the air supply filter generator passes through first solenoid valve is connected with the air supply, pressure transmitter's input passes through the second solenoid valve with the air supply filter generator is connected, the second solenoid valve with be equipped with first regulator between the air supply filter generator, wherein, be equipped with the second regulator that is used for carrying out the fine setting to atmospheric pressure between pressure transmitter's the output and the test fixture, the output of second regulator with test fixture's air inlet zonulae occludens, the input of second regulator with connect through the gas transmission pipeline between the pressure transmitter.
The fine adjustment device is arranged between the pressure transmitter and the test fixture, so that the problem that in the prior art, only a gas pipeline is connected is avoided, and the error is generated between the gas pressure entering the test fixture and the pressure at the output end of the pressure transmitter due to the gravity of the gas pipeline, and the error often causes insufficient test precision, so that some samples to be tested with small cracks cannot be detected.
Optionally, the air tightness detection device further comprises a control circuit, and the control circuit is electrically connected with the first electromagnetic valve, the air source filtering generator, the first pressure regulating device, the second electromagnetic valve and the pressure transmitting device respectively.
Optionally, a cavity is arranged on the test fixture, a vent is arranged on the cavity, the cavity is buckled on a to-be-detected region of a to-be-detected product in use, and the control circuit judges whether the to-be-detected product is a qualified product according to the change of the air pressure information acquired by the pressure transmitter.
Preferably, the test fixture comprises an upper fixture and a lower fixture, the cavity is arranged between the upper fixture and the lower fixture, and an anti-skid part is arranged on the interface between the upper fixture or the lower fixture and the cavity.
More preferably, the cavity is made of ferromagnetic material, and the anti-slip part is an electromagnet.
More preferably, the antiskid part adopts an antiskid sucker.
Divide into anchor clamps and lower anchor clamps with test fixture can effectually carry out the gas tightness test according to the operating mode of difference to the different positions of the product that awaits measuring, increase the antiskid portion simultaneously between anchor clamps and die cavity and both can guarantee that the die cavity does not drop, can guarantee again according to the position of different operating mode adjustment die cavities.
Optionally, a through-type two-way solenoid valve is arranged between the cavity and the pressure transmitter, and the through-type two-way solenoid valve is connected with the control circuit. The straight-through two-way solenoid valve is used for selectively communicating with the outside atmosphere. By adopting the mode, the air tightness detector can exhaust air rapidly by selectively communicating with the external atmosphere.
Optionally, the control circuit is further connected to a display screen, and the display screen is used for displaying the working state of the air tightness detection device.
Optionally, a sealing gasket is arranged between the cavity and the product to be tested. The sealing gasket can be made of elastic materials, and if the surface of a test product is not smooth, the sealing gasket can keep the sealing property between the cavity and the product to be tested, so that the accuracy of a test result is ensured.
Optionally, the second pressure regulating device comprises a pressure regulating valve and a barometer, the barometer is connected with the vent, the output end of the pressure regulating valve is connected with the barometer, and the input end of the pressure regulating valve is connected with the gas transmission pipeline.
Preferably, the pressure regulating valve adopts a one-way throttle valve.
Optionally, a control button is arranged on the air tightness detection device, and the control button is connected with the control circuit. The control buttons may include, for example, on/off buttons: air-tight instrument power on/off mode; a start button: starting the air tightness instrument for detection at a single time; a reset button: the air tightness instrument is recovered to the initial state; in the above manner, the operator can selectively operate the working state of the air tightness detector according to the requirement.
Has the advantages that: adopt the design scheme of the utility model can effectual solution because the die cavity internal pressure that the pipeline buckled and leads to the unsafe problem of test result with pressure transmitter output pressure is inconsistent to make the die cavity can be applicable to different operating modes, promote the efficiency that detects.
Drawings
Fig. 1 is an overall schematic view of an air tightness detecting device according to the present invention;
fig. 2 is a schematic view of the air tightness detecting device of the present invention;
in the figure: 1. the gas source filters generator, 2, the cover body, 3, pressure transmitter, 4, second regulator, 5, the gas source, 6, the die cavity, 7, lower anchor clamps, 8, last anchor clamps, 9, first solenoid valve, 10, display screen, 11, reset button, 12, start button, 13, through two-way solenoid valve.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention will be further explained with reference to the specific drawings.
Referring to fig. 1 and 2, an air tightness detection device, including first solenoid valve 9, the second solenoid valve, air supply filter generator 1 and pressure transmitter 3, air supply filter generator is connected with air supply 5 through first solenoid valve, pressure transmitter's input passes through the second solenoid valve and is connected with air supply filter generator, be equipped with first regulator between second solenoid valve and the air supply filter generator, wherein be equipped with between pressure transmitter's the output and the test fixture and be used for carrying out the second regulator 4 that finely tunes to atmospheric pressure, the output of second regulator and the air inlet zonulae occludens that the test was controlled, be connected through the gas pipeline between second regulator's the input and the pressure transmitter.
The fine adjustment device is arranged between the pressure transmitter and the test fixture, so that the problem that in the prior art, only a gas pipeline is connected is avoided, and the error is generated between the gas pressure entering the test fixture and the pressure at the output end of the pressure transmitter due to the gravity of the gas pipeline, and the error often causes insufficient test precision, so that some samples to be tested with small cracks cannot be detected.
In one embodiment, the air tightness detection device further comprises a control circuit, and the control circuit is electrically connected with the first electromagnetic valve, the air source filtering generator, the first pressure regulating device, the second electromagnetic valve and the pressure transmitting device respectively.
In one embodiment, the test fixture is provided with a cavity 6, the cavity is provided with a vent, the cavity is buckled on a to-be-detected area of a to-be-detected product in use, and the control circuit judges whether the to-be-detected product is a qualified product according to the change of air pressure information acquired by the pressure transmitter.
Preferably, the test fixture comprises an upper fixture 8 and a lower fixture 7, the cavity is arranged between the upper fixture and the lower fixture, and an anti-skid part is arranged on the interface of the upper fixture or the lower fixture and the cavity.
More preferably, the cavity is made of ferromagnetic material, and the antiskid part is an electromagnet.
More preferably, the antiskid part adopts an antiskid sucker.
Divide into anchor clamps and lower anchor clamps with test fixture can effectually carry out the gas tightness test according to the operating mode of difference to the different positions of the product that awaits measuring, increase the antiskid portion simultaneously between anchor clamps and die cavity and both can guarantee that the die cavity does not drop, can guarantee the position of different operating mode adjustment die cavities more again.
In one embodiment, a through type two-way electromagnetic valve 13 is arranged between the cavity and the pressure transmitter, and the through type two-way electromagnetic valve is connected with a control circuit. The straight-through two-way solenoid valve is used for selectively communicating with the outside atmosphere. By adopting the mode, the air tightness detector can exhaust air rapidly by selectively communicating with the external atmosphere.
In one embodiment, the control circuit is further connected to a display screen 10 for displaying the operating status of the air tightness detecting device. A dust inlet cover body 2 in the air tightness detection device can be arranged above the display screen.
In one embodiment, a sealing gasket is arranged between the cavity and the product to be tested. The sealing gasket can be made of elastic materials, and if the surface of a test product is not smooth, the sealing gasket can keep the sealing property between the cavity and the product to be tested, so that the accuracy of a test result is ensured.
In one embodiment, the second pressure regulating device comprises a pressure regulating valve and a pressure gauge, the pressure gauge is connected with the vent, the output end of the pressure regulating valve is connected with the pressure gauge, and the input end of the pressure regulating valve is connected with the gas transmission pipeline.
Preferably, the pressure regulating valve is a one-way throttle valve.
In one embodiment, the air tightness detection device is provided with a control button, and the control button is connected with the control circuit. The control buttons may include, for example, on/off buttons: air-tight instrument power on/off mode; start button 12: starting the air tightness instrument for detection at a single time; reset button 11: the air tightness instrument is recovered to the initial state; in the above manner, the operator can selectively operate the working state of the air tightness detector according to the requirement.
The air tightness detection device can be divided into a clamping stage, an inflation stage, a pressure maintaining stage, a detection stage and an exhaust stage when in use.
1) And in the clamping stage, buckling the air tightness instrument testing interface on the area to be detected of the product to be detected.
2) In the inflation stage, after the start button is pressed, the control circuit controls the electromagnetic valve to open the cavity of the test fixture cylinder, open the electric control valve and the pressure transmitter, and close the straight-through type electromagnetic valve to be connected with the air source for driving so that the air path between the test fixtures of the pressure transmitter reaches a negative pressure state. The pressure transmitter acquires air pressure information between the air source filtering generator and the testing jig and sends the control circuit to display the air pressure information in real time through the display screen. The air pressure of the air source is 0.1-0.6 MPa.
3) In the pressure maintaining stage, the connection of the testing jig cavity and the straight-through type electromagnetic valve is controlled by the control circuit to be switched to be closed, and the pressure maintaining time is 5 seconds, wherein the straight-through type two-way electromagnetic valve is closed to keep the air pressure in the air passage between the pressure transmitter and the testing jig cavity stable. The pressure transmitter continuously acquires air pressure information between the air source filter generator and the testing jig cavity and sends the control circuit to display the air pressure information in real time through the display screen. It should be noted that the above-mentioned pressure maintaining time of 5 seconds is only an exemplary illustration, and can be actually set according to the size of the technical parameter of air tightness of the product to be detected.
4) In the detection stage, the electromagnetic valve is controlled by the control circuit to be connected with the testing jig cavity and the straight-through two-way electromagnetic valve is switched to be closed, and the electromagnetic valve is continuously kept closed. After the pressure maintaining time is 5 seconds in the step 3), the pressure transmitter starts to acquire and record the air pressure information in the air path between the test product end and the cavity of the test fixture 3 within 5 seconds, and sends the control circuit to further display the air pressure information in real time through the display screen. The air tightness detector calculates the air pressure difference value before 5 seconds and after 5 seconds by acquiring the air pressure information, and then judges whether the product to be detected is a qualified product. It should be noted that the above-mentioned duration test time of 5 seconds is only an exemplary illustration, and can be set according to the size of the product to be detected.
The pressure regulating valve in the second pressure regulating device can be adjusted in real time at the stage to ensure that the pressure in the cavity and the output pressure of the pressure transmitter are kept consistent.
5) In the exhaust stage, the electromagnetic valve is controlled by the control circuit to be connected with the testing jig cavity and the straight-through two-way electromagnetic valve is switched to be in an open state, so that the air path from the product testing end to the testing jig cavity is communicated with the external atmosphere and is restored to be at the standard atmospheric pressure.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. The utility model provides an air tightness detection device, includes first solenoid valve, second solenoid valve, air supply filter generator and pressure transmitter, air supply filter generator passes through first solenoid valve is connected with the air supply, pressure transmitter's input passes through the second solenoid valve with air supply filter generator connects, the second solenoid valve with be equipped with first regulator between the air supply filter generator, a serial communication port, be equipped with the second regulator that is used for carrying out the fine setting to atmospheric pressure between pressure transmitter's the output and the test fixture, the output of second regulator with the air inlet zonulae occludens that the test was controlled, the input of second regulator with connect through the gas transmission pipeline between the pressure transmitter.
2. The airtightness detection apparatus according to claim 1, further comprising a control circuit, wherein the control circuit is electrically connected to the first electromagnetic valve, the air source filter generator, the first pressure regulating device, the second electromagnetic valve, and the pressure transmitting device, respectively.
3. The airtightness detection apparatus according to claim 2, wherein the test fixture is provided with a cavity, the cavity is provided with a vent, the cavity is fastened to a region to be detected of a product to be detected in use, and the control circuit determines whether the product to be detected is a qualified product according to a change in the air pressure information acquired by the pressure transmitter.
4. The apparatus according to claim 3, wherein the testing fixture comprises an upper fixture and a lower fixture, the cavity is disposed between the upper fixture and the lower fixture, and an anti-slip portion is disposed on a contact surface of the upper fixture or the lower fixture with the cavity.
5. The airtightness detection apparatus according to claim 4, wherein a through type two-way solenoid valve is provided between the cavity and the pressure transmitter, and the through type two-way solenoid valve is connected to the control circuit.
6. The airtightness detection apparatus according to claim 2, wherein the control circuit is further connected to a display screen, and the display screen is configured to display an operating state of the airtightness detection apparatus.
7. The airtightness detection apparatus according to claim 3, wherein the second pressure adjustment apparatus includes a pressure adjustment valve and a pressure gauge, the pressure gauge is connected to the vent, an output end of the pressure valve is connected to the pressure gauge, and an input end of the pressure adjustment valve is connected to the gas transmission pipe.
8. The airtightness detection apparatus according to claim 7, wherein the pressure-regulating valve is a one-way throttle valve.
9. The airtightness detection apparatus according to any one of claims 2 to 8, wherein a control button is provided on the airtightness detection apparatus, and the control button is connected to the control circuit.
CN202021036320.XU 2020-06-08 2020-06-08 Air tightness detection device Active CN212206510U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021036320.XU CN212206510U (en) 2020-06-08 2020-06-08 Air tightness detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021036320.XU CN212206510U (en) 2020-06-08 2020-06-08 Air tightness detection device

Publications (1)

Publication Number Publication Date
CN212206510U true CN212206510U (en) 2020-12-22

Family

ID=73808927

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021036320.XU Active CN212206510U (en) 2020-06-08 2020-06-08 Air tightness detection device

Country Status (1)

Country Link
CN (1) CN212206510U (en)

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