CN214471489U - Protective structure of pressure sensor - Google Patents
Protective structure of pressure sensor Download PDFInfo
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- CN214471489U CN214471489U CN202120582201.2U CN202120582201U CN214471489U CN 214471489 U CN214471489 U CN 214471489U CN 202120582201 U CN202120582201 U CN 202120582201U CN 214471489 U CN214471489 U CN 214471489U
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Abstract
The utility model relates to a protective structure of a pressure sensor, which comprises a cover body and a dust removal unit; the cover body is arranged at the upper end of the pressure sensor, and a protection cavity is formed between the cover body and the pressure sensor; here, the pressure sensor is a pressure sensor of a gauge type; the dust removal unit is arranged at the upper end of the cover body and comprises a first plate and a second plate which are arranged in parallel up and down, a first baffle ring is arranged on the end surface of the lower end of the first plate, a second baffle ring is arranged on the end surface of the upper end of the second plate, the first baffle ring and the second baffle ring are coaxially arranged and are arranged in a vertically staggered mode along the radial direction of the first baffle ring to form a concentric corrugated diversion channel, and a connecting pipe is connected between the first plate and the second plate; the connecting pipe is including being located the inside netted pipeline section of diversion passageway, connecting pipe intercommunication diversion passageway and protection cavity, the utility model discloses a diversion passageway removes dust, simultaneously the utility model discloses better gas permeability has.
Description
Technical Field
The utility model relates to a pressure sensor technical field, especially a pressure sensor's protective structure.
Background
The gauge pressure type pressure sensor is used for measuring the difference value between the measured gas pressure and the atmospheric pressure, the atmospheric pressure values under different environments are different due to the influence of factors such as temperature, humidity, altitude and the like, and in order to ensure the output precision of the gauge pressure type pressure sensor, the atmospheric pressure value and the internal pressure of the pressure sensor are required to be ensured to be balanced.
In a severe atmospheric environment, dust enters inside an MEMS (micro electro mechanical system) pressure sensor while the inside of a gauge pressure type pressure sensor communicates with the environment, and affects the measurement accuracy and durability of the pressure sensor.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the dust to existence among the prior art enters into the inside technical problem who influences pressure sensor measurement accuracy and durability of pressure sensor, provides a pressure sensor's protective structure.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a protective structure for a pressure sensor, comprising:
the cover body is arranged at the upper end of the pressure sensor, and a protection cavity is formed between the cover body and the pressure sensor;
the dust removal unit is installed on the upper end of the cover body and comprises a first plate and a second plate which are arranged in an up-down parallel mode, the lower end face of the first plate is provided with a first baffle ring, the upper end face of the second plate is provided with a second baffle ring, the first baffle ring and the second baffle ring are coaxially arranged and are arranged in a staggered mode from top to bottom along the radial direction of the first baffle ring, a concentric corrugated diversion channel is formed, a connecting pipe is connected between the first plate and the second plate and comprises a mesh pipe section located inside the diversion channel, the connecting pipe is located in the circle center of the diversion channel, the connecting pipe is communicated with the diversion channel and a protection cavity, and the outer circumference of the diversion channel is communicated with the atmospheric environment.
The utility model has the advantages that: the diversion channel is communicated with the atmospheric environment and the protection cavity, and the protection cavity is communicated with the inside of the pressure sensor, so that the communication between the inside of the pressure sensor and the environment is realized; dust in the atmospheric environment enters the diversion channel along with the gas, the gas collides with the side wall of the diversion channel in the process, and the dust adheres to the side wall of the diversion channel to remove dust from the gas entering the protection cavity, so that the protection of the pressure sensor is realized; more important point is that, the diversion passageway is concentric circles corrugate, and the connecting pipe is located the centre of a circle of diversion passageway, connecting pipe intercommunication diversion passageway and protection cavity, the outer circumference of diversion passageway and atmospheric environment intercommunication, make the utility model discloses better gas permeability has to guarantee pressure sensor measurement accuracy.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the dust removal unit is detachably connected with the cover body.
The beneficial effect of adopting the further scheme is that: the dust removal unit can be replaced as a whole.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, be equipped with first through-hole on the second plate, the lid upper end is equipped with the second through-hole, and the connecting pipe lower extreme passes first through-hole and installs inside the second through-hole.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the lower end of the connecting pipe is in threaded connection with the second through hole.
The beneficial effect of adopting the further scheme is that: the screw connection has simple structure, reliable connection and convenient assembly and disassembly
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Furthermore, the lower end of the connecting pipe is in clearance fit with the first through hole.
The beneficial effect of adopting the further scheme is that: because the lower end of the connecting pipe is in clearance fit with the first through hole, the first plate and the second plate can be disassembled, and dust attached to the surfaces of the first retaining ring and the second retaining ring can be cleaned conveniently.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Furthermore, the outer circle surface of the connecting pipe is provided with a positioning part, and the lower end face of the positioning part is used for abutting against the upper end face of the second plate.
The beneficial effect of adopting the further scheme is that: the first retaining ring and the second retaining ring are guaranteed to be staggered up and down through the positioning portion, and therefore smoothness of the diversion channel is guaranteed.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Furthermore, the positioning part is annular and coaxial with the connecting pipe.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Furthermore, the number of the first retaining rings is not less than two, and the number of the second retaining rings is not less than two.
The beneficial effect of adopting the further scheme is that: the first retaining ring is not less than two, the second retaining ring is not less than two, and gas turns for many times in the turning channel, so that the dust removal effect is favorably improved.
Drawings
Fig. 1 is a schematic view of the protection structure of the pressure sensor according to the present invention after being assembled with the pressure sensor;
fig. 2 is a perspective view of the protective structure of the pressure sensor of the present invention;
fig. 3 is a top view of the protective structure of the pressure sensor of the present invention;
fig. 4 is a cross-sectional view taken at a-a in fig. 3.
In the drawings, the components represented by the respective reference numerals are listed below:
10. the dust removal device comprises a cover body, 20, a pressure sensor, 30, a protection cavity, 40, a dust removal unit, 41, a first plate, 42, a first retaining ring, 43, a second plate, 44, a second retaining ring, 45, a connecting pipe, 46, a positioning part, 50 and a turning channel.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1 to 4, a protective structure of a pressure sensor includes a cover 10 and a dust removing unit; the cover body 10 is arranged at the upper end of the pressure sensor, and a protection cavity 30 is formed between the cover body 10 and the pressure sensor 20; here, the pressure sensor 20 is a pressure sensor of a gauge type; the dust removal unit is installed at the upper end of the cover body 10, the dust removal unit 40 comprises a first plate 41 and a second plate 43 which are arranged in parallel from top to bottom, a first baffle ring 42 is arranged on the end face of the lower end of the first plate 41, a second baffle ring 44 is arranged on the end face of the upper end of the second plate 43, the first baffle ring 42 and the second baffle ring 44 are coaxially arranged and are arranged in a vertically staggered mode along the radial direction of the first baffle ring 42 to form a concentric corrugated diversion channel 50, a connecting pipe 45 is connected between the first plate 41 and the second plate 43, the connecting pipe 45 is located in the center of the diversion channel 50, the connecting pipe 45 comprises a mesh pipe section located inside the diversion channel 50, the connecting pipe 45 is communicated with the diversion channel 50 and the protection cavity 30, and the outer circumference of the diversion channel 50 is communicated with the atmospheric environment.
In this embodiment, the diversion channel 50 communicates with the atmosphere and the protection cavity 30, and the protection cavity 30 communicates with the inside of the pressure sensor 20, so that the inside of the pressure sensor 20 communicates with the atmosphere; dust in the atmospheric environment enters the diversion channel 50 along with the gas, and in the process, the gas collides with the side wall of the diversion channel 50, and the dust adheres to the side wall of the diversion channel 50 to remove dust from the gas entering the protection cavity 30, so that the pressure sensor 20 is protected; more importantly, the diversion channel 50 is in a concentric ripple shape, the connecting pipe 45 is located at the center of the diversion channel 50, the connecting pipe 45 is communicated with the diversion channel 50 and the protection cavity 30, and the outer circumference of the diversion channel 50 is communicated with the atmosphere environment, so that the protection structure of the pressure sensor 20 has better air permeability to ensure the measurement accuracy of the pressure sensor 20 in the embodiment.
In one embodiment of the present invention, the first retainer 42 is not less than two, and the second retainer 44 is not less than two. For example, two first baffle rings 42 and two second baffle rings 44 are provided, and the first baffle rings 42 and the second baffle rings 44 are arranged in a vertically staggered manner along the radial direction of the first baffle rings 42, so that the gas is deflected for multiple times in the deflecting channel 50, and a better dust removal effect is obtained.
In order to prolong the service life of the pressure sensor 20, in an embodiment of the present invention, the dust removing unit 40 is detachably connected to the cover 10, so that the dust removing unit 40 can be replaced in time in a severe atmosphere environment. As a further optimization of the present embodiment, a first through hole is formed in the second plate 43, a second through hole is formed in the upper end of the cover 10, the lower end of the connecting pipe 45 passes through the first through hole and is installed inside the second through hole, and the upper end of the connecting pipe 45 is connected to the first plate 41 by welding or screwing. Here, the structure of the connection pipe 45 is further explained, and the connection pipe 45 includes a mesh pipe section and a threaded pipe section which are coaxially arranged up and down, wherein the mesh pipe section is formed by connecting sheet metal meshes end to end, and the mesh pipe section is welded with the threaded pipe section; in this embodiment, the dust removing unit 40 is detachably connected to the cover 10 in such a manner that the lower end of the connecting pipe 45 is screwed to the second through hole; the screw connection has simple structure, reliable connection and convenient assembly and disassembly.
In one embodiment of the present invention, the lower end of the connecting pipe 45 is clearance-fitted to the first through hole. Due to the clearance fit between the lower end of the connecting pipe 45 and the first through hole, the first plate 41 and the second plate 43 can be detached, so that dust attached to the surfaces of the first retaining ring 42 and the second retaining ring 44 can be cleaned conveniently.
In an embodiment of the present invention, the outer circumferential surface of the connecting pipe 45 is provided with a positioning portion 46, and the lower end surface of the positioning portion 46 is used for abutting against the upper end surface of the second plate 43; the positioning portion 46 ensures that the first baffle ring 42 and the second baffle ring 44 are staggered up and down, so as to ensure the smoothness of the diversion channel 50. For example, in the present embodiment, the positioning portion 46 is annular, and the positioning portion 46 is coaxial with the connecting pipe 45.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (8)
1. A protective structure for a pressure sensor, comprising:
the cover body (10), the cover body (10) is installed on the upper end of the pressure sensor (20), and a protection cavity (30) is formed between the cover body (10) and the pressure sensor (20);
the dust removal unit (40) is arranged at the upper end of the cover body (10), the dust removal unit (40) comprises a first plate (41) and a second plate (43) which are arranged in parallel from top to bottom, a first baffle ring (42) is arranged on the end face of the lower end of the first plate (41), a second baffle ring (44) and the first baffle ring (42) are arranged on the end face of the upper end of the second plate (43), the second keeps off ring (44) coaxial arrangement and both keep off ring (42) radial staggered arrangement from top to bottom along first, form direction changing passageway (50) of concentric circles corrugate, be connected with connecting pipe (45) between first plate (41) and second plate (43), connecting pipe (45) are including being located the inside netted pipeline section of direction changing passageway, connecting pipe (45) are located the centre of a circle of direction changing passageway (50), connecting pipe (45) intercommunication direction changing passageway (50) and protection cavity (30), direction changing passageway (50) outer circumference and atmospheric environment intercommunication.
2. A protective structure for a pressure sensor according to claim 1, wherein said dust-removing unit (40) is detachably connected to the cover body (10).
3. The pressure sensor protection structure according to claim 2, wherein the second plate (43) is provided with a first through hole, the cover (10) is provided with a second through hole at the upper end, and the lower end of the connecting pipe (45) passes through the first through hole and is installed inside the second through hole.
4. A pressure sensor shielding structure according to claim 3, wherein the lower end of the connecting tube (45) is screwed to the second through hole.
5. A pressure sensor shielding structure according to claim 3, wherein the lower end of the connecting tube (45) is clearance fitted with the first through hole.
6. A protection structure of a pressure sensor according to claim 3, characterized in that the outer circumferential surface of the connecting pipe (45) is provided with a positioning portion (46), and the lower end surface of the positioning portion (46) is used for abutting against the upper end surface of the second plate (43).
7. A pressure sensor shielding structure according to claim 6, wherein the positioning portion (46) is annular, and the positioning portion (46) is coaxial with the connecting tube (45).
8. A pressure sensor shielding structure according to claim 1, wherein said first stop ring (42) is not less than two and said second stop ring (44) is not less than two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120582201.2U CN214471489U (en) | 2021-03-22 | 2021-03-22 | Protective structure of pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120582201.2U CN214471489U (en) | 2021-03-22 | 2021-03-22 | Protective structure of pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214471489U true CN214471489U (en) | 2021-10-22 |
Family
ID=78159152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120582201.2U Active CN214471489U (en) | 2021-03-22 | 2021-03-22 | Protective structure of pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214471489U (en) |
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2021
- 2021-03-22 CN CN202120582201.2U patent/CN214471489U/en active Active
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