Air tightness testing device for pressure sensor

Abstract

The utility model discloses an air tightness testing device used for a pressure sensor, comprising a carrier used for placing a plurality of products, two sides of the carrier are provided with a first clamping assembly and a second clamping assembly, and the first clamping assembly and the second clamping assembly cooperate to fix the plurality of products on the carrier at the same time; a detection assembly capable of testing a plurality of products on the carrier at the same time is arranged above the carrier, and data acquired by the detection assembly is acquired by a data acquisition card and then transmitted to an industrial personal computer; a gas injection assembly capable of injecting gas into the multiple products on the carrier at the same time is arranged below the carrier. According to the utility model, air tightness detection can be carried out on a plurality of products on a carrier in a centralized manner, air inflation test and air leakage detection are carried out uniformly after clamping and positioning, the plurality of products can be detected in a centralized manner at one time, and the overall detection efficiency of the products is improved; meanwhile, by means of the movable track, the product can be matched with other equipment, and the production requirements of a production line are met.

Description

Technical Field

[0001] The utility model belongs to the field of automobile parts detection and relates to an airtightness testing device for a pressure sensor. Background Art

[0002] When the car engine is started, its internal part is in a state of high temperature and high pressure. The engine oil pressure sensor is an important device for detecting the oil pressure of the vehicle engine. The detected data can help control the normal operation of the engine. For this reason, the above-mentioned pressure sensor needs to be tested for performance before assembly, among which air tightness testing is an important part.

[0003] The existing air tightness test of pressure sensors requires heating the pressure sensor first, then taking it out of the oven and filling it with 3~4Mpa nitrogen, and using equipment outside the pressure sensor to detect whether there is nitrogen leakage, so as to judge the air tightness performance of the pressure sensor. The existing air tightness test device of pressure sensors cannot perform air tightness tests on a large scale and cannot meet the batch testing requirements of existing workshops.

[0004] Therefore, it is necessary to improve the prior art to overcome the defects in the prior art. Utility Model Content

[0005] The utility model aims to provide an airtightness testing device for a pressure sensor, which can perform batch airtightness testing on a plurality of pressure sensors and improve the airtightness testing efficiency of the pressure sensors.

[0006] The purpose of the utility model is achieved through the following technical solutions:

[0007] A device for testing air tightness of a pressure sensor comprises a carrier for placing a plurality of products, wherein a first clamping assembly and a second clamping assembly are arranged on both sides of the carrier, and the first clamping assembly and the second clamping assembly cooperate to fix the plurality of products on the carrier simultaneously; a detection assembly capable of testing the plurality of products on the carrier simultaneously is arranged above the carrier, and data obtained by the detection assembly is acquired by a data acquisition card and then transmitted to an industrial computer; and a gas injection assembly capable of injecting gas into the plurality of products on the carrier simultaneously is arranged below the carrier.

[0008] Furthermore, the carrier is slidably arranged on a moving track, and a positioning cylinder for positioning the carrier is arranged on one side of the moving track.

[0009] Furthermore, the first clamping assembly and the second clamping assembly are distributed on both sides of the moving track, and the first clamping assembly, the second clamping assembly and the moving track are fixedly arranged on the mounting frame.

[0010] Furthermore, the mounting frame is fixedly arranged on the upper end of the control cabinet, and one end of the gas injection assembly is fixedly arranged in the control cabinet.

[0011] In one embodiment, the gas injection assembly includes a driving device fixedly connected to the control cabinet, a lifting plate connected to the driving device is provided in the mounting frame, a plurality of gas connecting pipes corresponding to the products are provided on the lifting plate, a guide plate for limiting the position of the gas connecting pipe is provided on the mounting frame, and an inflation joint aligned with the product is provided at the upper end of the gas connecting pipe; a pressure indicator is provided between the gas connecting pipe and the external gas source.

[0012] Furthermore, a guide sleeve is provided on the mounting frame, a guide column is vertically provided in the guide sleeve, the upper end of the guide column is fixedly connected to the lifting plate, and the lower end of the guide column.

[0013] Furthermore, an elastic slot is provided on the lifting plate, one end of the air receiving pipe is provided in the elastic slot, a spring is provided in the elastic slot, the upper end of the spring abuts against the air receiving pipe, and the lower end of the spring abuts against the bottom plate of the elastic slot.

[0014] In one embodiment, the first clamping assembly and the second clamping assembly have the same structure and both include a pair of slide seats fixed on a mounting frame, a slide groove is provided in each of the pair of slide seats, a slide plate is provided in the two slide grooves, a clamping plate is provided at one end of the slide plate, a clamping groove corresponding to the product is provided on the clamping plate, and the other end of the slide plate is connected to the clamping cylinder.

[0015] In one embodiment, the detection component includes a lifting frame fixed on a mounting frame, a vertical cylinder is provided at the upper end of the lifting frame, the vertical cylinder is connected to the detection bracket through a connecting component, and a plurality of data acquisition connectors corresponding to the product are provided at the lower end of the detection bracket.

[0016] Further, the connecting assembly includes an upper supporting plate and a lower supporting plate connected to the vertical cylinder, the detection bracket is arranged on the lower supporting plate, the lower end of the upper supporting plate has a card slot A, the upper end of the lower supporting plate has a card slot B corresponding to the card slot A, a connecting plate is arranged between the upper supporting plate and the lower supporting plate, the upper end of the connecting plate is arranged in the card slot A, and the lower end of the connecting plate is arranged in the card slot B, and the connecting plate is fixedly connected to the upper supporting plate and the lower supporting plate by a locking member.

[0017] Furthermore, a scanning gun group is arranged on the lifting frame, and the scanning gun group has a scanning gun that can identify the number on the carrier.

[0018] The above technical solution has the following beneficial effects: this product can be used in high temperature environments, can perform air tightness tests on multiple products on the carrier, and can perform inflation tests and leakage tests uniformly after clamping and positioning. It can perform centralized testing on multiple products at one time, thereby improving the overall testing efficiency of the products. At the same time, relying on the mobile track, the product can cooperate with other equipment to meet the production needs of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure provided by the utility model.

[0022] Figure 2 This is a schematic diagram of the internal structure of the control cabinet provided by the utility model.

[0023] Figure 3 This is a schematic diagram of the local three-dimensional structure provided by the utility model.

[0024] Figure 4 for Figure 3 A magnified schematic diagram of area A in the middle.

[0025] Figure 5 for Figure 3 Schematic diagram of the main view state structure.

[0026] Figure 6 This is a structural schematic diagram of the carrier and product provided by the utility model.

[0027] In the figure: 1-control cabinet; 2-mounting frame; 3-moving track; 4-carrier; 41-positioning hole; 5-positioning cylinder; 6-first clamping assembly; 61, 62-slide seat; 63-slide plate; 64-clamping plate; 65-clamping cylinder; 7-second clamping assembly; 8-detection assembly; 81-lifting frame; 82-vertical cylinder; 83-detection bracket; 84-data acquisition connector; 85-upper receiving plate; 86-lower receiving plate; 87-connecting plate; 9-gas injection assembly; 91-driving device; 92-lifting plate; 93-gas pipe; 94-inflation connector; 95-pressure indicator; 96-elastic card slot; 10-data acquisition card; 11-industrial computer; 12-scanning gun group. DETAILED DESCRIPTION

[0028] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other. Example

[0029] See also Figure 1-Figure 6 As shown, an air tightness test device for a pressure sensor includes a control cabinet 1 and a mounting frame 2 arranged at the upper end of the control cabinet 1. The mounting frame 2 has an upper loading plate and a lower supporting plate, a cavity is left between the upper loading plate and the lower supporting plate, and the lower supporting plate is bolted to the control cabinet 1. A moving track 3 is arranged on the upper loading plate, and a carrier 4 with multiple products is arranged on the moving track 3 and moves forward driven by the moving track 3. A plurality of positioning holes 41 are arranged on the side wall of the carrier 4, and a positioning cylinder 5 is arranged on one side of the moving track. The piston rod of the positioning cylinder 5 is pushed out and acts on the positioning hole to fix the position of the carrier 4.

[0030] The first clamping assembly 6 and the second clamping assembly 7 are fixedly arranged on the upper loading plates on both sides of the moving track 3. When the carrier 4 is positioned by the positioning cylinder 5, the first clamping assembly 6 and the second clamping assembly 7 cooperate to fix multiple products on the carrier 4 at the same time. At this time, a detection assembly 8 that can test multiple products on the carrier 4 at the same time is arranged above the carrier 4. The data obtained by the detection assembly 8 is acquired by the data acquisition card 10 and then transmitted to the industrial computer 11. The industrial computer 11 processes the collected data and transmits it to the server. A gas injection assembly 9 that can inject gas into multiple products on the carrier at the same time is arranged below the carrier 4.

[0031] Specifically, the gas injection assembly 9 includes a driving device 91, which includes an outer sleeve and an inner sleeve. The inner sleeve is arranged inside the outer sleeve and exposed at the upper end of the outer sleeve. A servo motor is arranged outside the outer sleeve. A ball screw pair connected to the servo motor is arranged inside the outer sleeve. The ball screw pair is arranged vertically and the nut thereon is fixedly connected to the inner sleeve through a connector. Through the above structural design, the inner sleeve on the driving device 91 can move vertically up and down. The driving device 91 is installed in the control cabinet 1.

[0032] A lifting plate 92 is provided in the cavity of the mounting frame 2, and the lifting plate 92 is fixedly connected to the inner sleeve on the driving device 91. In order to make the lifting plate 92 move up and down stably, guide sleeves are provided on the mounting frame 2 on both sides of the driving device 91, and guide pillars are vertically provided in the guide sleeves, and the upper ends of the guide pillars are fixedly connected to the lifting plate 92. A plurality of air connection pipes 93 corresponding to the products are provided on the lifting plate 92, and a guide plate for limiting the position of the air connection pipe 93 is provided on the mounting frame 2, that is, the guide plate has a plurality of openings, and the air connection pipe 93 is inserted into the corresponding openings to prevent the air connection pipe 93 from shaking left and right during use. An inflation joint 94 is provided at the upper end of the air connection pipe 93, which is aligned with the product, and a sealing ring is provided on the inflation joint 94 to ensure that when the inflation joint 94 is filled with nitrogen into the product, the nitrogen will not overflow from the inflation joint 94.

[0033] In order to ensure the stability of the nitrogen pressure filled into the product, a pressure indicator 95 (model Drucker pace5000) is used in this embodiment. Specifically, a pressure indicator 95 is provided between the gas connection pipe 93 and the external gas source, and the pressure indicator 95 provides stable nitrogen to the gas connection pipe 93.

[0034] In this embodiment, a buffer structure is added to the gas injection assembly 9 to mitigate the impact force when the inflation connector 94 is pressed against the product. Specifically, an elastic card slot 96 is provided on the lifting plate 92, and one end of the air connecting pipe 93 is provided in the corresponding elastic card slot 96. A spring is provided in the above-mentioned elastic card slot 96, and the upper end of the spring abuts against the upper part of the air connecting pipe 93, and the lower end abuts against the bottom plate of the elastic card slot. Through the buffering of the spring, the upward impact force of the air connecting pipe 93 and the inflation connector 94 is reduced during use, thereby ensuring the stability of the contact between the inflation connector 94 and the product (the part of the product in contact with the inflation connector is made of plastic material, and excessive impact is likely to cause deformation or cracks in the plastic structure of this part).

[0035] In this embodiment, 16 products are placed evenly on a carrier 4. In this embodiment, two sets of identical airtightness testing devices are used to perform airtightness tests on them simultaneously, and the two sets of airtightness testing devices are abutted together. When the number of products on the carrier is larger, more sets of airtightness testing devices can be used to jointly perform airtightness tests on the products thereon, which has a wide range of applications.

[0036] The first clamping assembly 6 and the second clamping assembly 7 of this embodiment have the same structure. For the convenience of description, the first clamping assembly 6 is taken as an example for explanation.

[0037] The first clamping assembly 6 includes a pair of slides 61 and 62 fixed on the mounting frame 2, and slide grooves are provided in the slides 61 and 62, and slide plates 63 are provided in the two slide grooves. A clamping plate 64 is provided at one end of the slide plate 63, and a clamping groove corresponding to the product is provided on the clamping plate 64, and the other end of the slide plate 63 is connected to the clamping cylinder 65. The cylinder seat of the clamping cylinder 65 is fixed on the mounting frame 2. When in use, the stroke of the clamping cylinder 65 is pre-adjusted. When the carrier 4 is in place, the clamping cylinders on the first clamping assembly 6 and the second clamping assembly 7 are synchronously expanded to clamp and position the two sides of the product so that the product will not be displaced during the nitrogen stamping process (here, the contact surface between the product and the first clamping assembly 6 and the second clamping assembly 7 is made of metal material).

[0038] In this embodiment, the detection assembly 8 includes a lifting frame 81 fixed on the mounting frame 2, and a vertical cylinder 82 is arranged at the upper end of the lifting frame 81, and the vertical cylinder 82 is connected to the detection bracket 83 through a connection assembly, and a plurality of data acquisition connectors 84 corresponding to the product are arranged at the lower end of the detection bracket 83. The connection assembly includes an upper receiving plate 85 and a lower receiving plate 86 connected to the vertical cylinder 82, and the detection bracket 83 is arranged on the lower receiving plate 86, and the lower end of the upper receiving plate 85 has a card slot A, and the upper end of the lower receiving plate 86 has a card slot B corresponding to the card slot A, and a connection plate 87 is arranged between the upper receiving plate 85 and the lower receiving plate 86, and the upper end of the connection plate 87 is arranged in the card slot A, and the lower end of the connection plate 87 is arranged in the card slot B, and the connection plate 87 is fixedly connected to the upper receiving plate 85 and the lower receiving plate 86 through a locking member. The application of the above connection assembly is helpful for the stable up and down movement of the detection bracket 83.

[0039] In this embodiment, a scanner group 12 is arranged on the lifting frame, and the scanner group has a scanner that can identify the number on the carrier.

[0040] When the data obtained by the detection component 8 is acquired by the data acquisition card 10, it is transmitted to the industrial computer 11, which processes the collected data and transmits it to the server for storage. The scanner will identify the number of each carrier passing through and transmit it to the corresponding directory of the server, thereby obtaining the corresponding data on whether the product on each carrier is qualified for air tightness testing. Provide data support for the back-end operation of the production line.

[0041] The air tightness testing device of this embodiment is an integral part of the overall production line. The controller on the production line of the actuator components distributed thereon uniformly controls the air tightness testing device, the power supply unit on the production line uniformly supplies power to the air tightness testing device, and the gas source on the production line uniformly provides gas supply to ensure the normal operation of the air tightness testing device.

[0042] The air tightness testing device of the utility model can be used in a high temperature environment, can perform air tightness testing on multiple products on a carrier, and uniformly perform inflation test and leakage test after clamping and positioning. It can perform centralized testing on multiple products at one time, thereby improving the overall testing efficiency of the products. At the same time, relying on the mobile track, the product can cooperate with other equipment to meet the production needs of the production line.

[0043] The above is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. An airtightness testing device for a pressure sensor, characterized in that: It comprises a carrier for placing multiple products, wherein a first clamping assembly and a second clamping assembly are arranged on both sides of the carrier, and the first clamping assembly and the second clamping assembly can cooperate to fix multiple products on the carrier at the same time; a detection assembly capable of testing multiple products on the carrier at the same time is arranged above the carrier, and the data obtained by the detection assembly is acquired by a data acquisition card and then transmitted to an industrial computer; a gas injection assembly capable of injecting gas into multiple products on the carrier at the same time is arranged below the carrier.

2. The airtightness testing device according to claim 1, characterized in that: The carrier is slidably arranged on a moving track, and a positioning cylinder for positioning the carrier is arranged on one side of the moving track.

3. The airtightness testing device according to claim 2, characterized in that: The first clamping assembly and the second clamping assembly are distributed on both sides of the moving track, and the first clamping assembly, the second clamping assembly and the moving track are fixedly arranged on the mounting frame.

4. The airtightness testing device according to claim 3, characterized in that: The mounting frame is fixedly arranged on the upper end of the control cabinet, and one end of the gas injection assembly is fixedly arranged in the control cabinet.

5. The airtightness testing device according to claim 4, characterized in that: The gas injection assembly includes a driving device fixedly connected to the control cabinet, a lifting plate connected to the driving device is arranged in the mounting frame, a plurality of gas connecting pipes corresponding to the products are arranged on the lifting plate, a guide plate for limiting the position of the gas connecting pipe is arranged on the mounting frame, an inflation joint aligned with the product is arranged at the upper end of the gas connecting pipe; a pressure indicator is arranged between the gas connecting pipe and the external gas source.

6. The airtightness testing device according to claim 5, characterized in that: The mounting frame is provided with a guide sleeve, a guide column is vertically provided in the guide sleeve, the upper end of the guide column is fixedly connected to the lifting plate, and the lower end of the guide column.

7. The airtightness testing device according to claim 5 or 6, characterized in that: The lifting plate is provided with an elastic slot, one end of the air receiving pipe is provided in the elastic slot, a spring is provided in the elastic slot, the upper end of the spring abuts against the air receiving pipe, and the lower end of the spring abuts against the bottom plate of the elastic slot.

8. The airtightness testing device according to claim 3, characterized in that: The first clamping assembly and the second clamping assembly have the same structure and both include a pair of slide seats fixed on a mounting frame, a slide groove is provided in each of the pair of slide seats, a slide plate is provided in the two slide grooves, a clamping plate is provided at one end of the slide plate, a clamping groove corresponding to the product is provided on the clamping plate, and the other end of the slide plate is connected to the clamping cylinder.

9. The airtightness testing device according to claim 3, characterized in that: The detection component includes a lifting frame fixed on the mounting frame, a vertical cylinder is arranged at the upper end of the lifting frame, the vertical cylinder is connected to the detection bracket through a connection component, and a plurality of data acquisition connectors corresponding to the product are arranged at the lower end of the detection bracket.

10. The airtightness testing device according to claim 9, characterized in that: The connecting assembly includes an upper connecting plate and a lower connecting plate connected to the vertical cylinder, the detection bracket is arranged on the lower connecting plate, the lower end of the upper connecting plate has a card slot A, the upper end of the lower connecting plate has a card slot B corresponding to the card slot A, a connecting plate is arranged between the upper connecting plate and the lower connecting plate, the upper end of the connecting plate is arranged in the card slot A, the lower end of the connecting plate is arranged in the card slot B, and the connecting plate is fixedly connected to the upper connecting plate and the lower connecting plate by a locking member.

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