Automatic leak detection device for gas generator

Abstract

An automatic leak detection device for a gas generator comprises a supporting platform, a bottom plate is arranged on the supporting platform, and a leak detection tank lower body is fixed on the bottom plate; the middle parts of the bottom plate and the supporting platform are respectively provided with a through hole and an exhaust pipeline is inserted into the through hole; a first electromagnetic valve, a second electromagnetic valve and an air suction electromagnetic valve are mounted at the lower end of the air suction pipeline through a four-way joint, the first electromagnetic valve is connected with an air inlet of a helium leak detector, an air outlet of the helium leak detector is connected with a vacuum pump, and the second electromagnetic valve is connected with a pre-vacuumizing pump; a top plate is fixedly supported on two sides of the bottom plate through two stand columns, a power source is arranged in the middle of the top plate, and a leak detection tank upper body is fixed at the lower end of the power source; two groups of guide assemblies are symmetrically arranged on the top plate, and guide columns of the guide assemblies are respectively connected to the mounting plate; and an automatic scanning gun is fixed on one of the stand columns and corresponds to the gas generator to be detected. The device is high in detection efficiency, product quality can be guaranteed, product production information is in one-to-one correspondence, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The utility model relates to an automatic detection device, in particular to an automatic leakage detection device for a gas generator. Background Art

[0002] During the production process of gas generators, it is necessary to test the sealing of gas generators. The sealing of gas generators will affect the performance of the product. If the sealing of the product is unqualified, the reagents in the gas generator will be damp, causing the gas generator to fail to work normally, thus losing its protective effect on the occupants. At present, the sealing of gas generators is tested manually, which is not only inefficient but also prone to missed detection. In addition, the QR code of each product needs to be scanned one by one during the test to ensure that the product production information corresponds one by one to prevent the outflow of unqualified products, which is labor-intensive. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a gas generator automatic leak detection device which has high detection efficiency, can ensure product quality, one-to-one correspondence of product production information, and reduces the labor intensity of personnel.

[0004] The technical solution of the utility model is as follows:

[0005] An automatic leak detection device for a gas generator comprises a trough-shaped support platform, wherein: a bottom plate is arranged on the support platform, a lower body of a leak detection tank is fixed on the bottom plate, and the gas generator to be detected is placed thereon; corresponding through holes are arranged in the middle of the bottom plate and the support platform, and a gas extraction pipeline is plugged therein, and the upper end of the gas extraction pipeline is sealed and plugged with the lower body of the leak detection tank;

[0006] A four-way valve is connected to the lower end of the exhaust pipeline inside the support platform, and a first solenoid valve, a second solenoid valve and an air suction solenoid valve are installed through the four-way valve. The first solenoid valve is connected to the air inlet of the helium leak detector through a pipeline, and the air outlet of the helium leak detector is connected to the vacuum pump through a pipeline. The second solenoid valve is connected to the pre-vacuum pump through a pipeline;

[0007] A top plate is fixedly supported by two symmetrically arranged columns on both sides of the bottom plate, a power source is provided in the middle of the top plate, and an upper body of the leak detection tank is fixed at the lower end of the power source through a mounting plate, which is used to control the upper body of the leak detection tank to move downward and press on the lower body of the leak detection tank to form a sealed leak detection tank; two groups of guide assemblies are symmetrically provided on both sides of the power source on the top plate, and the guide columns of the two groups of guide assemblies are respectively connected to the mounting plates to realize the guidance of the upper body of the leak detection tank;

[0008] An automatic scanning gun is fixed on one of the columns through a jacket. The automatic scanning gun corresponds to the gas generator to be detected and is used to scan the QR code on the gas generator and feed back to the industrial computer to store product production information.

[0009] As a further preference, the power source is a cylinder, and is fixed in the middle of the top plate in the vertical direction, a connecting plate is fixed at the lower end of the piston rod of the cylinder, and the mounting plate is fixed under the connecting plate.

[0010] As a further preference, a laser sensor is provided on another column through a jacket and a bolt, and the laser sensor corresponds to the gas generator to be detected and is used to detect whether the gas generator is installed in place.

[0011] As a further preference, a vacuum gauge is provided near the lower end of the exhaust pipeline for measuring the vacuum degree in the leak detection tank.

[0012] As a further preference, each group of the guide components includes a guide sleeve fixed on the top plate, in which a guide column is slidably installed through a linear bearing; a buffer plate is connected between the upper ends of the two guide columns, two hydraulic buffers are symmetrically provided at both ends of the buffer plate, and positioning columns are respectively provided on the top plate at corresponding positions of the hydraulic buffers, which are used to achieve buffering and positioning when the upper body of the leak detection tank is pressed downward.

[0013] As a further preference, a positioning sleeve is provided in the lower body of the leak detection tank, which is plugged into the lower body of the leak detection tank through two pins and is used to support the gas generator to be tested; a positioning pin is provided on one side of the upper end of the positioning sleeve for circumferentially positioning the gas generator to be tested.

[0014] The beneficial effects of the utility model are as follows: a gas generator to be detected can be placed and positioned through the lower body of the leak detection tank, and the upper body of the leak detection tank is driven downward by a power source and then pressed on the lower body of the leak detection tank to form a sealed leak detection tank, in which the gas generator to be detected can be covered; the gas generator can be detected through the cooperation of a pre-vacuum pump and a helium leak detector, which can not only automatically detect the airtightness of the gas generator, with a high degree of automation and high detection efficiency; but also can automatically scan the QR code on the gas generator to prevent human error, ensure one-to-one correspondence between product production information, and reduce the labor intensity of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 yes Figure 1 A partial enlarged view of .

[0017] In the figure: supporting platform 1, pre-vacuum pump 2, helium leak detector 3, first solenoid valve 4, vacuum pump 5, bottom plate 6, second solenoid valve 7, vacuum gauge 8, leak detection tank lower body 9, positioning sleeve 10, automatic scanning gun 11, mounting plate 12, guide sleeve 13, guide column 14, hydraulic buffer 15, buffer plate 16, power source 17, positioning column 18, connecting plate 19, top plate 20, leak detection tank upper body 21, gas generator 22, O-ring 23, laser sensor 24, jacket 25, column 26, suction solenoid valve 27, exhaust pipeline 28, four-way 29. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0019] like Figure 1 and Figure 2 As shown, the utility model relates to an automatic leak detection device for a gas generator, comprising a groove-shaped supporting platform 1, on which a bottom plate 6 is fixed, on which a lower body 9 of a leak detection tank is fixed, a circular groove is provided on the lower body 9 of the leak detection tank, and corresponding through holes are respectively provided in the middle of the bottom plate 6 and the supporting platform 1 and are plugged with an exhaust pipeline 28, and the upper end of the exhaust pipeline 28 is sealed and plugged with the groove in the lower body 9 of the leak detection tank.

[0020] At the lower end of the exhaust pipeline 28, a spool 29 is connected inside the support platform 1, and the first solenoid valve 4, the second solenoid valve 7 and the suction solenoid valve 27 are sealed and connected through the spool 29 and the pipeline. The first solenoid valve 4 is connected to the air inlet of the helium leak detector 3 through a pipeline. The helium leak detector 3 is a helium mass spectrometer leak detector, and its air outlet is connected to the vacuum pump 5 through a pipeline; the second solenoid valve 7 is connected to the pre-vacuum pump 2 through a pipeline. The other end of the suction solenoid valve 27 is connected to the outside.

[0021] Two columns 26 are symmetrically fixed on both sides of the bottom plate 6, and the top plate 20 is fixedly supported by the columns 26; a power source 17 is provided in the middle of the top plate 20, and a mounting plate 12 is connected to the lower end of the power source 17, and a leak detection tank upper body 21 is fixed below the mounting plate 12, which is used to press on the leak detection tank lower body 9 to form a sealed leak detection tank after descending; two groups of guide components are symmetrically provided on both sides of the power source 17 on the top plate 20, and the guide columns 14 of the two groups of guide components are respectively connected to the mounting plate 12, which are used to guide the leak detection tank upper body. An O-type sealing ring 23 is embedded in the upper end surface of the leak detection tank lower body 9, which is used to improve the sealing of the leak detection tank.

[0022] An automatic scanner 11 is fixed to one of the columns 26 by means of a jacket 25 and bolts. The automatic scanner 11 corresponds to the gas generator to be detected and is used to scan the QR code on the gas generator and feed back to the industrial computer to store product production information. A laser sensor 24 is fixed to another column 26 by means of a jacket 25 and bolts. The laser sensor 24 corresponds to the gas generator to be detected and is used to detect whether the gas generator is installed in place.

[0023] The power source 17 is preferably a cylinder, and is fixed in the middle of the top plate in the vertical direction. A connecting plate 19 is fixed at the lower end of the piston rod of the cylinder, and the mounting plate 12 is fixed below the connecting plate 19 by bolts. A vacuum gauge 8 is installed near the lower end of the exhaust line 28 to measure the vacuum degree in the leak detection tank.

[0024] Each guide assembly includes a guide sleeve 13 fixed on the top plate 20, and a guide column 14 is slidably installed in the guide sleeve 13 through a linear bearing 19. A buffer plate 16 is connected between the upper ends of the two guide columns 14, and two hydraulic buffers 15 are symmetrically arranged at both ends of the buffer plate 16. Positioning columns 18 are respectively arranged on the top plate 20 corresponding to the positions of the hydraulic buffers 15, which are used to achieve buffering and positioning when the upper body 21 of the leak detection tank is pressed down.

[0025] A positioning sleeve 10 is inserted into the lower body 9 of the leak detection tank through a clearance fit. The positioning sleeve 10 is plugged into the inner bottom surface of the lower body 9 of the leak detection tank through two symmetrically arranged pins to support the gas generator to be detected. A positioning pin is provided on one side of the upper end of the positioning sleeve 10 to circumferentially position the gas generator to be detected.

[0026] The gas generator automatic leak detection device is also provided with a PLC controller (not shown in the figure) for receiving the signal of the laser sensor 24 and controlling the operation of the automatic scanning gun 11, the power source 17 and each solenoid valve.

[0027] During operation, the helium leak detector 3, the vacuum pump 5, and the pre-vacuum pump 2 are started in sequence, and the first solenoid valve 4, the second solenoid valve 7 and the suction solenoid valve 27 are controlled to be closed; the gas generator 22 to be leak-checked is inserted into the positioning sleeve through the positioning pin and placed in the lower body 9 of the leak detection tank, and the laser sensor 24 detects the gas generator to be leak-checked and sends a signal to the controller. The controller first controls the automatic scanning gun 11 to start, scans the QR code on the gas generator, and feeds back to the industrial computer to store the product production information.

[0028] Then the controller controls the power source 17 to extend, pushes the mounting plate 12 to drive the upper body 21 of the leak detection tank to move downward, and performs buffering and limiting through the positioning column 18 and the hydraulic buffer 15. When the upper body of the leak detection tank contacts the lower body 9 of the leak detection tank, a sealed leak detection tank is formed; when the power source 17 is extended into place, the second solenoid valve 7 is controlled to open, and after the inside of the leak detection tank is evacuated into a vacuum through the started pre-vacuum pump 2, the second solenoid valve 7 is controlled to close, and the first solenoid valve 4 is opened, and the gas generator 22 is leak-tested through the started helium leak detector 3. After the leak test is completed, the first solenoid valve 4 is controlled to close, and the suction solenoid valve 27 is opened to allow the leak detection tank to be suctioned. After the inside of the leak detection tank returns to normal pressure, the power source 17 is controlled to reset, and the gas generator 22 can be manually taken out.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic leak detection device for a gas generator, comprising a grooved support platform, characterized in that: A bottom plate is provided on the support platform, and a lower body of the leak detection tank is fixed on the bottom plate for placing the gas generator to be detected; corresponding through holes are provided in the middle of the bottom plate and the support platform and are plugged with exhaust pipelines, and the upper end of the exhaust pipeline is sealed and plugged with the lower body of the leak detection tank; A four-way valve is connected to the lower end of the exhaust pipeline inside the support platform, and a first solenoid valve, a second solenoid valve and an air suction solenoid valve are installed through the four-way valve. The first solenoid valve is connected to the air inlet of the helium leak detector through a pipeline, and the air outlet of the helium leak detector is connected to the vacuum pump through a pipeline. The second solenoid valve is connected to the pre-vacuum pump through a pipeline; A top plate is fixedly supported by two symmetrically arranged columns on both sides of the bottom plate, a power source is provided in the middle of the top plate, and an upper body of the leak detection tank is fixed at the lower end of the power source through a mounting plate, which is used to control the upper body of the leak detection tank to move downward and press on the lower body of the leak detection tank to form a sealed leak detection tank; two groups of guide assemblies are symmetrically provided on both sides of the power source on the top plate, and the guide columns of the two groups of guide assemblies are respectively connected to the mounting plates to realize the guidance of the upper body of the leak detection tank; An automatic scanning gun is fixed on one of the columns through a jacket. The automatic scanning gun corresponds to the gas generator to be detected and is used to scan the QR code on the gas generator and feed back to the industrial computer to store product production information.

2. The automatic leak detection device for a gas generator according to claim 1, characterized in that: The power source is a cylinder, which is fixed in the middle of the top plate in the vertical direction. A connecting plate is fixed at the lower end of the piston rod of the cylinder, and the mounting plate is fixed under the connecting plate.

3. The automatic leak detection device for a gas generator according to claim 1, characterized in that: A laser sensor is arranged on another column through a jacket and a bolt. The laser sensor corresponds to the gas generator to be detected and is used to detect whether the gas generator is installed in place.

4. The automatic leak detection device for a gas generator according to claim 1, characterized in that: A vacuum gauge is provided near the lower end of the air extraction pipeline to measure the vacuum degree in the leak detection tank.

5. The automatic leak detection device for a gas generator according to claim 1, characterized in that: Each group of the guide components includes a guide sleeve fixed on the top plate, in which a guide column is slidably installed through a linear bearing; a buffer plate is connected between the upper ends of the two guide columns, and two hydraulic buffers are symmetrically provided at both ends of the buffer plate, and positioning columns are respectively provided on the top plate at the positions corresponding to the hydraulic buffers, which are used to achieve buffering and positioning when the upper body of the leak detection tank is pressed downward.

6. The automatic leak detection device for a gas generator according to claim 1 is characterized in that: A positioning sleeve is arranged in the lower body of the leak detection tank, and the positioning sleeve is plugged with the lower body of the leak detection tank through two pins to support the gas generator to be detected; a positioning pin is arranged on one side of the upper end of the positioning sleeve to circumferentially position the gas generator to be detected.

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