CN218584287U - Airtightness testing device for sensor shell - Google Patents
Airtightness testing device for sensor shell Download PDFInfo
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- CN218584287U CN218584287U CN202222857528.3U CN202222857528U CN218584287U CN 218584287 U CN218584287 U CN 218584287U CN 202222857528 U CN202222857528 U CN 202222857528U CN 218584287 U CN218584287 U CN 218584287U
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Abstract
The utility model relates to a sensor housing's airtight testing arrangement, including cylinder, the pneumatic switching-over valve of electromagnetism, normally closed electromagnetism admission valve, normally closed electromagnetism water intaking valve, normally closed electromagnetism drain valve, installation lath, connecting seat, little sealed pad, big sealed pad, water tank and corresponding connecting tube etc. implement to compress tightly, seal sensor housing through pneumatics, fill into the gas of certain pressure and immerse in aquatic in sensor housing's airtight cavity, observe whether the bubble spills over around the airtight cavity, realize the water proofness of inspection sensor housing. Compared with the prior art, the patent has the advantages that: overall structure is simple exquisite, and spare part is selected, connected mode and whole theory of operation are reasonable clear, and accessible logic control realizes semi-automatic detection, and efficient and observe the degree of distinguishing height, has application and spreading value in the sensor trade to the medium and small batch production of similar part.
Description
Technical Field
The utility model relates to an airtight test technique among the machine-building process, concretely relates to sensor housing's airtight testing arrangement.
Background
The application environment of the sensor product is severe, so the sensor is generally physically isolated from the surrounding environment except that the sensor directly touches the measured medium, and has different waterproof grade requirements and the like. The shell used as the protective layer of the sensor has the watertight protection requirement in the design, and the watertight protection requirement is generally checked by using an airtight test method in the manufacturing process. The oil pressure sensor is a shell of the oil pressure sensor, the front part of the shell is a machined connector, the rear part of the shell is a base formed by stamping a metal plate, and the front part and the rear part of the shell are manufactured by annular welding. The shell has good manufacturability and economy, and has wide application in the sensor industry for engines. However, the shell has requirements on welding in a welding process, and the welding seam has requirements on strength and water tightness. In the actual manufacturing process, the watertight requirement of the shell is generally converted into an air tightness test which can be visually observed, and how to carry out the air tightness test efficiently, massively, stably and reliably becomes a problem which needs to be solved.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model aims to solve the technical problem that a sealed cavity is established for the sensor shell, a tested welding seam is contained in the sealed cavity, the sealed cavity is placed into water, gas with certain pressure is input into the sealed cavity, whether bubbles overflow around the sealed cavity or not is observed within a certain time, and if yes, the welding seam does not meet the watertight requirement; if not, the welding seam meets the watertight requirement.
In order to solve the technical problem, the utility model provides a technical scheme does: an air tightness testing device of a sensor shell comprises a water tank 13, wherein a support 12 is additionally arranged at the bottom of the water tank 13, a matched sensor shell 10 is installed on the support 12, a matched connecting seat 8 is connected to the top of the sensor shell 10, the side part of the connecting seat 8 is connected with an external normally closed electromagnetic air inlet valve 3 through a pipeline, the normally closed electromagnetic air inlet valve 3 is connected with an air source through a matched pipeline, and a cover plate fastened by bolts is arranged at the upper part of the connecting seat 8;
the installation lath 7 is installed to add on the installation lath 7 and is equipped with a cylinder 1, and cylinder 1 is corresponding with connecting seat 8 positions on vertical direction, and the cylinder push rod end connection of cylinder 1 is on the apron of connecting seat 8, and the air inlet valve port and the exhaust valve port of the pneumatic solenoid directional valve 2 of one side are connected respectively through two pipelines to 1 lateral part of cylinder, and the pneumatic solenoid directional valve 2 is connected with the air supply through supporting pipe.
In an embodiment of the present invention, two overflow openings 5 are formed on the side of the water tank 13, and the two overflow openings 5 are arranged one above the other.
In an embodiment of the present invention, the overflow port 5 is additionally provided with a normally closed electromagnetic drain valve 6 through a pipeline.
In one embodiment of the present invention, the bottom of the sensor housing 10 is provided with a large sealing pad 11 connected and matched with the sensor housing, and the bottom of the large sealing pad 11 is fixed on the bracket 12.
In an embodiment of the present invention, a base with a hard conduit is disposed in the sensor housing 10, and the top of the hard conduit is inserted into the bottom hole of the connecting seat 8 and is communicated with the connecting seat 8 and the pipeline of the normally closed electromagnetic intake valve 3, so as to form a sealed gas circuit.
In one embodiment of the present invention, a small sealing pad 9 is installed at the bottom hole of the connecting seat 8.
In an embodiment of the present invention, the water tank 13 is filled with tap water, and the outer wall of the water tank 13 is coated with water level marks of different water level heights.
In an embodiment of the present invention, the side of the mounting plate strip 7 is provided with two through holes, one through hole is used for the matching pipeline of the normally closed electromagnetic inlet valve 3 to pass through, the other through hole is used for the matching pipeline of the normally closed electromagnetic inlet valve 4 to pass through, and the end of the matching pipeline of the normally closed electromagnetic inlet valve 4 is immersed below the liquid level of the water tank 13.
Compared with the prior art, the technical scheme of the utility model have following advantage: overall structure is simple exquisite, and spare part is selected, connected mode and whole theory of operation are reasonable clear, and accessible logic control realizes semi-automatic detection, and efficient and observe the degree of discernment height, has application and spreading value in the sensor trade to the medium and small batch production of similar part.
Drawings
In order to make the content of the present invention more clearly understood, the present invention will be described in further detail with reference to the following embodiments of the present invention, in conjunction with the accompanying drawings.
Fig. 1 is a schematic structural diagram of an air tightness testing device for a sensor housing according to the present invention.
As shown in the figure: 1. a cylinder; 2. an electromagnetic pneumatic directional valve; 3. a normally closed electromagnetic air intake valve; 4. a normally closed electromagnetic water inlet valve; 5. an overflow port; 6. normally closing the electromagnetic drain valve; 7. installing a batten; 8. a connecting seat; 9. a small seal gasket; 10. a sensor housing; 11. a large seal gasket; 12. a support; 13. a water tank.
Detailed Description
As shown in fig. 1, the present embodiment provides an air tightness testing device for a sensor housing, where the components include a cylinder 1, an electromagnetic pneumatic directional valve 2, a normally closed electromagnetic intake valve 3, a normally closed electromagnetic intake valve 4, an overflow port 5, a normally closed electromagnetic drain valve 6, a mounting lath 7, a connecting seat 8, a small sealing gasket 9, a sensor housing 10, a large sealing gasket 11, a bracket 12, a water tank 13, and the like, where:
the cylinder 1 can adjust the sealing and pressing force on the sensor shell 10 by adjusting air pressure;
the electromagnetic pneumatic reversing valve 2 can change the direction (extending or retracting) of a push rod of the air cylinder 1 through control;
the normally closed electromagnetic air inlet valve 3 is communicated with the connecting seat 8, and can charge gas with certain pressure into a closed cavity formed by the sensor shell 10;
the normally closed electromagnetic water inlet valve 4 can be controlled to add water into the water tank 13, so that the sensor shell 10 is immersed in the water;
the overflow port 5 is a drain port (overflow port at high water level) of which the water level of the water tank exceeds a water level I;
a water discharging device (an overflow opening at a low water level) which is used for controlling the water level of the water tank 1 to be reduced to a water level II through a normally closed electromagnetic water discharging valve 6;
the mounting lath 7 is a metal frame of the cylinder 1 and is connected with the upper end surface of the water tank 13;
one end of the connecting seat 8 is connected with a push rod of the cylinder 1, the lower part of the connecting seat can be provided with a small sealing gasket 9, and an air passage is communicated with the normally closed electromagnetic air inlet valve 3;
the small sealing gasket 9 is made of rubber or polyurethane elastomer materials, and achieves the sealing of the contact surface through elastic deformation;
the sensor shell 10 is a part needing a watertight test;
the large sealing gasket 11 is made of rubber or polyurethane elastomer materials, and achieves the sealing of a contact surface through elastic deformation;
the bracket 12 plays a role in positioning and is matched with the large sealing gasket 11 for use;
the water tank 13 provides a container for an aqueous medium for a water-tight test.
The assembly process of the device is as follows:
(1) The large packing 11 is installed, as shown in fig. 1, the bracket 12 is installed and fixed in the water tank 13, and the large packing 11 is positioned and fixed to the bracket 12.
(2) Mounting the cylinder 1, as shown in fig. 1, fixing the mounting lath 7 to the end surface of the water tank 13, and then fixing the cylinder 1 to the mounting lath 7 by corresponding screws, wherein an air inlet and an air outlet of the cylinder 1 are connected with the electromagnetic pneumatic reversing valve and the pipeline 2. The center line of the push rod of the cylinder 1 and the center line of the large packing 11 are ensured to be coaxial, and the height of the bracket 12 is adjusted to fit the stroke of the push rod of the cylinder 1. A connecting seat 8 is arranged on the end face of a push rod of the air cylinder 1, a small sealing gasket 9 is embedded into the lower portion of the connecting seat 8, and the side face of the connecting seat 8 is connected with the normally closed electromagnetic air inlet valve and the channel 3.
(3) The water inlet and outlet are installed, as shown in fig. 1, a normally closed electromagnetic inlet valve and channel 4 is fixed on a mounting lath 7, a normally closed electromagnetic outlet valve and channel 6 is installed at the bottom of a water tank 13, and a spillway opening 5 is installed at a corresponding position of the water tank 13.
The motion process of the device is as follows:
(1) And (2) pressing, as shown in fig. 1, placing a sensor shell 10 (with the large end facing downwards) on a large sealing gasket 11, adjusting the air inlet pressure of the air cylinder 1, extending a push rod of the air cylinder 1, pressing the small end face of the sensor shell 10 by the end face of a small sealing gasket 9 and transmitting pressing force, and forming a closed cavity by the connecting seat 8, the small sealing gasket 9, the sensor shell 10, the large sealing gasket 11, the normally closed electromagnetic air inlet valve and the channel 3.
(2) And (3) filling water, wherein as shown in figure 1, the normally closed electromagnetic water inlet valve 4 is communicated to fill water into the water tank 13 until the water level of the water tank 13 reaches a water line I, and then is closed.
(3) When the normally closed electromagnetic air inlet valve 3 is switched on in the watertight test, air with certain air pressure is contained in a sealed cavity formed by the sensor shell 10, whether bubbles overflow around the sealed cavity or not is observed within a certain time, and if yes, the welding seam of the sensor shell 10 cannot meet the watertight requirement; if not, the welding seam reaches the watertight requirement.
(4) After the time of reaching the airtight test, the normally closed electromagnetic drain valve 6 is conducted until the water level in the water tank 13 reaches the waterline two, the normally closed electromagnetic drain valve 6 is closed, and meanwhile, the normally closed electromagnetic intake valve 3 is also closed. The electromagnetic pneumatic reversing valve 2 of the air cylinder 1 is reversed, the push rod of the air cylinder 1 retracts, the sensor shell 10 which is finished with the test is taken out at the moment, the sensor shell 10 to be tested is placed again, and a new round of watertight test is started.
The following table is a one cycle test run:
it should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Various other modifications and alterations will occur to those skilled in the art upon reading the foregoing description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.
Claims (8)
1. An apparatus for testing the hermeticity of a sensor housing, comprising:
the water tank is characterized by comprising a water tank (13), wherein a support (12) is additionally arranged at the bottom of the water tank (13), a matched sensor shell (10) is arranged on the support (12), a matched connecting seat (8) is connected to the top of the sensor shell (10), the side part of the connecting seat (8) is connected with an external normally closed electromagnetic air inlet valve (3) through a pipeline, the normally closed electromagnetic air inlet valve (3) is connected with an air source through a matched pipeline, and a cover plate fastened by bolts is arranged at the upper part of the connecting seat (8);
the pneumatic control valve comprises a mounting lath (7), wherein a cylinder (1) is additionally arranged on the mounting lath (7), the cylinder (1) corresponds to the connecting seat (8) in the vertical direction, the end part of a cylinder push rod of the cylinder (1) is connected to a cover plate of the connecting seat (8), the side part of the cylinder (1) is respectively connected with an air inlet valve port and an air outlet valve port of the electromagnetic pneumatic reversing valve (2) on one side through two pipelines, and the electromagnetic pneumatic reversing valve (2) is connected with an air source through a matched pipeline.
2. The airtightness testing apparatus for a sensor housing according to claim 1, wherein: two overflow gaps (5) are formed in the side portion of the water tank (13), and the two overflow gaps (5) are arranged in an up-and-down mode.
3. The airtightness testing apparatus for a sensor housing according to claim 2, wherein: and a matched normally closed electromagnetic drain valve (6) is additionally arranged at the overflow port (5) through a pipeline.
4. The airtightness testing device for a sensor casing according to claim 1, wherein: the sensor is characterized in that a large sealing gasket (11) which is connected and matched is arranged at the bottom of the sensor shell (10), and the bottom of the large sealing gasket (11) is fixed on the support (12).
5. The airtightness testing device for a sensor casing according to claim 1, wherein: a base with a hard guide pipe is arranged in the sensor shell (10), and the top of the hard guide pipe is inserted into a hole at the bottom of the connecting seat (8) and communicated with the connecting seat (8) and a matched pipeline of the normally closed electromagnetic air inlet valve (3) to form a sealed air path.
6. The airtightness testing apparatus for a sensor housing according to claim 5, wherein: and a matched small sealing gasket (9) is additionally arranged at the hole site at the bottom of the connecting seat (8).
7. The airtightness testing device for a sensor casing according to claim 1, wherein: tap water is filled in the water tank (13), and water level identification lines with different water level heights are sprayed on the outer wall of the water tank (13).
8. The airtightness testing device for a sensor casing according to claim 1, wherein: two through holes are formed in the side portion of the mounting lath (7), one through hole is used for a matched pipeline of the normally closed electromagnetic air inlet valve (3) to penetrate, the other through hole is used for a matched pipeline connected with the normally closed electromagnetic water inlet valve (4) to penetrate, and the tail end of the matched pipeline of the normally closed electromagnetic water inlet valve (4) is immersed below the liquid level of the water tank (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222857528.3U CN218584287U (en) | 2022-10-28 | 2022-10-28 | Airtightness testing device for sensor shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222857528.3U CN218584287U (en) | 2022-10-28 | 2022-10-28 | Airtightness testing device for sensor shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218584287U true CN218584287U (en) | 2023-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222857528.3U Active CN218584287U (en) | 2022-10-28 | 2022-10-28 | Airtightness testing device for sensor shell |
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| CN (1) | CN218584287U (en) |
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2022
- 2022-10-28 CN CN202222857528.3U patent/CN218584287U/en active Active
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