CN219736631U - Small-sized large-range pressure sensor - Google Patents
Small-sized large-range pressure sensor Download PDFInfo
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- CN219736631U CN219736631U CN202320409943.4U CN202320409943U CN219736631U CN 219736631 U CN219736631 U CN 219736631U CN 202320409943 U CN202320409943 U CN 202320409943U CN 219736631 U CN219736631 U CN 219736631U
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- optical fiber
- clamping
- pressure sensor
- fixing seat
- fiber
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- 239000013307 optical fiber Substances 0.000 claims abstract description 84
- 239000000835 fiber Substances 0.000 claims abstract description 68
- 239000012528 membrane Substances 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims description 15
- 239000003292 glue Substances 0.000 claims description 12
- 230000003044 adaptive effect Effects 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to the technical field of pressure sensors, and discloses a small-sized large-range pressure sensor, which comprises an optical fiber grating, a diaphragm, a front end head, an optical fiber fixing seat, an optical fiber sleeve and a shell. The front end of the front end head is provided with a first clamping and embedding groove for the membrane to pass through and a second clamping and embedding groove which is arranged on the bottom of the first clamping and embedding groove and is matched with the membrane; the optical fiber fixing seat is connected to the rear end of the front end head at a position corresponding to the second clamping groove; one end of the optical fiber sleeve is connected with the rear end face of the diaphragm, and the other end of the optical fiber sleeve is embedded into the optical fiber fixing seat in an extending way; the shell is sleeved on the optical fiber fixing seat and is connected with the front end head; the rear end of the shell is provided with an optical fiber through hole; one end of the fiber bragg grating is fixedly arranged at one end of the fiber fixing seat, and the other end sequentially passes through the other end of the fiber fixing seat and extends into the fiber sleeve. The small-sized large-range pressure sensor is simple in structure, stable, reliable, convenient to assemble and disassemble, small in size, large in measuring range and good in measuring accuracy.
Description
Technical Field
The utility model relates to the technical field of pressure sensors, in particular to a small-sized large-range pressure sensor.
Background
The pressure sensor is the most commonly used sensor in industrial practice, is widely applied to various industrial self-control environments, and relates to various industries such as water conservancy and hydropower, railway traffic, intelligent building, production self-control, aerospace, military industry, petrochemical industry, oil well, electric power, ships, machine tools, pipelines and the like.
Chinese patent No. CN201310033789.6 discloses a fiber grating pressure sensor. The fiber grating pressure sensor comprises a pressure sensing shell, a fixing structure, a protection device, a sealing interface, a fiber grating, a sealing ring, a guide rod and an armored sheath. The pressure sensing shell is in threaded connection with the shell; one side of the elastic membrane in the pressure-sensing shell is subjected to pressure sensing, a groove is formed in the center of the other side of the elastic membrane, the elastic membrane is connected with one end of a guide rod for fixing the fiber bragg grating in a threaded manner or in glue manner, and the elastic membrane and the pressure-sensing shell are of an integrated structure; the other end of the shell with the hollow structure is connected with a fixed structure for fixing the other end of the fiber grating through an internal thread and is in threaded connection with the protection device through an external thread; the protection device is provided with a round hole penetrating through the fiber bragg grating, and the other end of the protection device is in threaded connection with the sealing interface; the other end of the sealing interface penetrating through the fiber bragg grating is connected with the armored sheath; the threaded connection parts are provided with sealing rings for enhancing sealing. However, the fiber grating pressure sensor has a complex overall structure and is not convenient to assemble and disassemble.
Disclosure of Invention
The utility model aims to overcome the problems in the prior art and provides a small-sized large-range pressure sensor which is convenient to assemble and disassemble.
In order to achieve the above purpose, the present utility model adopts the following scheme:
a small, wide-range pressure sensor comprising a fiber bragg grating, further comprising:
the membrane sheet is arranged on the surface of the membrane sheet,
the front end head is provided with a first clamping and embedding groove for the membrane to pass through and a second clamping and embedding groove which is arranged on the bottom of the first clamping and embedding groove and is matched with the membrane;
the optical fiber fixing seat is connected to the rear end of the front end head at a position corresponding to the second clamping groove;
one end of the optical fiber sleeve is connected with the rear end face of the diaphragm, and the other end of the optical fiber sleeve extends and is embedded into the optical fiber fixing seat;
the shell is sleeved on the optical fiber fixing seat and is connected with the front end head; the rear end of the shell is provided with an optical fiber through hole; one end of the fiber bragg grating is fixedly arranged at one end of the fiber fixing seat, and the other end of the fiber bragg grating sequentially penetrates through the other end of the fiber fixing seat and extends into the fiber sleeve.
Further, a mounting cavity for the optical fiber fixing seat to penetrate is arranged at the rear end of the front end head; a clamping hole which is communicated with the second clamping groove and the mounting cavity is formed in the position of the front end head corresponding to the second clamping groove; the front end of the optical fiber fixing seat penetrates into the mounting cavity to be connected with the clamping hole in an adaptive clamping mode.
Further, the optical fiber fixing seat comprises an optical fiber extension tube body part and an optical fiber positioning table part; the front end of the optical fiber extension tube body is in fit and embedded connection with the embedded hole; the rear end of the optical fiber extension tube body is connected with the optical fiber positioning table part; the optical fiber extension pipe body is provided with an optical fiber extension pipe through which the optical fiber sleeve can penetrate; the optical fiber positioning table part is provided with an optical fiber positioning surface; and the optical fiber positioning surface is provided with an optical fiber sealing glue positioning groove which is communicated with the optical fiber extension pipeline and is used for sealing glue to fix the optical fiber grating.
Further, the positions of the optical fiber through holes are arranged corresponding to the positions of the optical fiber sealing glue positioning grooves.
Further, the membrane is in a circular sheet shape; the first clamping and embedding grooves and the second clamping and embedding grooves are cylindrical grooves; the groove diameter of the first clamping groove is larger than that of the second clamping groove.
Further, the front head includes a cylindrical portion and a nut-shaped cylindrical portion; the cylindrical part is connected to the front end of the nut-shaped cylindrical part; the first clamping groove and the second clamping groove are both positioned on the cylindrical part.
Further, the front end of the housing has a mounting end adapted to be coupled into the mounting cavity.
Further, the mounting end is threadably coupled to the mounting cavity.
Further, the diaphragm is made of stainless steel.
Compared with the prior art, the utility model has the following advantages:
the utility model forms the small-sized large-range pressure sensor by combining the fiber bragg grating, the diaphragm, the front end head, the fiber bragg fixed seat, the fiber bragg sleeve and the shell, the diaphragm and the fiber bragg grating are stably installed, the structure is simple, the disassembly and the assembly are convenient, the whole volume of the small-sized large-range pressure sensor is small, the measuring range is large, and the measuring accuracy is good.
Drawings
The utility model will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is one of the exploded perspective views of the small, wide range pressure sensor of the present utility model.
FIG. 2 is a second exploded perspective view of the small, wide range pressure sensor of the present utility model.
Fig. 3 is a schematic perspective view of a small-sized wide-range pressure sensor according to the present utility model.
The drawings include:
front end 1, cylindrical portion 11, nut-shaped cylindrical portion 12, first snap groove 13, second snap groove 14, installation cavity 15, snap hole 16, optical fiber fixing base 2, optical fiber extension tube body 21, optical fiber extension tube 211, optical fiber positioning table portion 22, optical fiber positioning surface 221, optical fiber sealing positioning groove 222, optical fiber sleeve 3, housing 4, optical fiber wire hole 41, installation end 42, and diaphragm 5.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
As shown in fig. 1 to 3, a small-sized wide-range pressure sensor includes a fiber bragg grating, a diaphragm 5, a front head 1, a fiber fixing base 2, a fiber sleeve 3, and a housing 4. Wherein the fiber grating is of a conventional structure, and is not marked in the drawing. The front end of the front end head 1 is provided with a first clamping and embedding groove 13 for the membrane 5 to pass through and a second clamping and embedding groove 14 which is arranged on the bottom of the first clamping and embedding groove 13 and is matched with the membrane 5; the optical fiber fixing seat 2 is connected to the rear end of the front end head 1 at a position corresponding to the second clamping groove 14; one end of the optical fiber sleeve 3 is connected with the rear end face of the diaphragm 5, and the other end is embedded into the optical fiber fixing seat 2 in an extending way; the shell 4 is sleeved on the optical fiber fixing seat 2 and is connected with the front end head 1; the rear end of the shell 4 is provided with an optical fiber through hole 41; one end of the fiber bragg grating is fixedly arranged at one end of the fiber fixing seat 2, and the other end sequentially passes through the other end of the fiber fixing seat 2 and extends into the fiber sleeve 3.
This small-size wide range pressure sensor combines together through setting up fiber grating, diaphragm 5, front end 1, optic fibre fixing base 2, fiber sleeve 3 and shell 4 and forms small-size wide range pressure sensor, and diaphragm 5 and fiber grating realize stable installation, simple structure, easy dismounting, small-size wide range pressure sensor holistic is small moreover, and measuring range is big, and measurement accuracy is good.
In this embodiment, a mounting cavity 15 is provided at the rear end of the front end head 1 for the optical fiber fixing seat 2 to penetrate; a clamping hole 16 which is communicated with the second clamping groove 14 and the mounting cavity 15 is formed in the position of the front end head 1 corresponding to the second clamping groove 14; the front end of the optical fiber fixing seat 2 penetrates into the mounting cavity 15 to be connected with the clamping hole 16 in an adaptive clamping manner. Through setting up installation cavity 15 and inlay card hole 16, make things convenient for the location installation of optic fibre fixing base 2, easy dismounting makes this small-size wide range pressure sensor's overall structure stable installation.
Specifically, the front head 1 includes a cylindrical portion 11 and a nut-shaped cylindrical portion 12; the cylindrical portion 11 is connected to the front end of the nut-shaped cylindrical portion 12; the first clamping groove 13 and the second clamping groove 14 are positioned on the cylindrical part 11. The diameter of the cylindrical portion 11 is 18-20mm, preferably 20mm. The overall length of the front head 1 is 18-20mm, preferably 20mm, wherein the length of the cylindrical portion 11 is 14-15mm, preferably 15mm. Through setting up cylinder portion 11 and nut form cylinder portion 12 and forming front end 1, nut form cylinder portion 12 makes things convenient for the user to twist with the hands or twist with the spanner directly, makes things convenient for this small-size wide range pressure sensor's whole assembly, reaches easy dismounting's effect, adopts set for size design front end 1 moreover, makes this small-size wide range pressure sensor holistic small, facilitates the use.
Preferably, the membrane 5 is in the shape of a circular sheet; the first clamping and embedding groove 13 and the second clamping and embedding groove 14 are cylindrical grooves; the groove diameter of the first clamping groove 13 is larger than the groove diameter of the second clamping groove 14. Preferably, the groove diameter of the first clamping groove 13 is 14mm, the groove diameter of the second clamping groove 14 is 12mm, and the groove diameter of the first clamping groove 13 and the groove diameter of the second clamping groove 14 are set so as to facilitate observing whether the diaphragm 5 is installed in place or not, and observing the position of the diaphragm 5 and the condition of the diaphragm 5, and timely adjusting and replacing the diaphragm 5. Preferably, the diaphragm 5 is made of stainless steel, has excellent rigidity and durability, and is convenient for stable measurement of the small-sized large-range pressure sensor.
In this embodiment, the optical fiber fixing base 2 includes an optical fiber extension tube portion 21 and an optical fiber positioning stage portion 22; the front end of the optical fiber extension tube body 21 is in fit and embedded connection with the embedded hole 16; the rear end of the optical fiber extension tube body 21 is connected with the optical fiber positioning table part 22; the fiber extension pipe body 21 has a fiber extension pipe 211 through which the fiber ferrule 3 can be inserted; the optical fiber positioning table portion 22 has an optical fiber positioning surface 221; the optical fiber positioning surface 221 is provided with an optical fiber sealing glue positioning groove 222 which is communicated with the optical fiber extension pipeline 211 and is used for sealing glue to fix the optical fiber grating. Through setting up optic fibre seal glue constant head tank 222, fiber grating gets into shell 4 from optic fibre lead-through hole 41, fiber grating's the other end is through fiber seal glue constant head tank 222, optic fibre extension pipeline 211, then extend into in the fiber sleeve 3, fiber grating's one end is arranged in optic fibre seal glue constant head tank 222 to preferably adopt silicone rubber to bond at fiber seal glue constant head tank 222, make fiber grating install on fiber fixing base 2 steadily, be favorable to this small-size wide range pressure sensor overall structure stability, be convenient for accurate measurement.
Preferably, the position of the fiber through hole 41 corresponds to the position of the fiber sealing positioning groove 222, so that the wires connected with the fiber grating conveniently pass through the fiber through hole 41, and then the positions correspond to each other, and the fiber grating is more conveniently positioned and installed on the fiber fixing seat 2.
For the detachable mounting of the housing 4 to the front head 1, the front end of the housing 4 has a mounting end 42 which is adapted to be connected into the mounting cavity 15. Preferably, the mounting end 42 is in threaded connection with the mounting cavity 15, and has a simple structure and convenient assembly and disassembly. Of course, the mounting end 42 and the mounting cavity 15 may be fixed in a snap fit manner.
In summary, the embodiment of the utility model provides a small-sized wide-range pressure sensor, wherein the small-sized wide-range pressure sensor is formed by combining an optical fiber grating, a diaphragm 5, a front end head 1, an optical fiber fixing seat 2, an optical fiber sleeve 3 and a shell 4, the diaphragm 5 and the optical fiber grating are stably installed, the structure is simple, the disassembly and the assembly are convenient, the whole volume of the small-sized wide-range pressure sensor is small, the measuring range is large, and the measuring accuracy is good.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.
Claims (9)
1. The utility model provides a small-size wide-range pressure sensor, includes fiber bragg grating, its characterized in that still includes:
the membrane sheet is arranged on the surface of the membrane sheet,
the front end head is provided with a first clamping and embedding groove for the membrane to pass through and a second clamping and embedding groove which is arranged on the bottom of the first clamping and embedding groove and is matched with the membrane;
the optical fiber fixing seat is connected to the rear end of the front end head at a position corresponding to the second clamping groove;
one end of the optical fiber sleeve is connected with the rear end face of the diaphragm, and the other end of the optical fiber sleeve extends and is embedded into the optical fiber fixing seat;
the shell is sleeved on the optical fiber fixing seat and is connected with the front end head; the rear end of the shell is provided with an optical fiber through hole; one end of the fiber bragg grating is fixedly arranged at one end of the fiber fixing seat, and the other end of the fiber bragg grating sequentially penetrates through the other end of the fiber fixing seat and extends into the fiber sleeve.
2. The small-sized and wide-range pressure sensor according to claim 1, wherein a mounting cavity for the fiber fixing seat to penetrate is arranged on the rear end of the front end head; a clamping hole which is communicated with the second clamping groove and the mounting cavity is formed in the position of the front end head corresponding to the second clamping groove; the front end of the optical fiber fixing seat penetrates into the mounting cavity to be connected with the clamping hole in an adaptive clamping mode.
3. The miniature, wide-range pressure sensor of claim 2, wherein said fiber optic mounting base comprises a fiber optic extension tube portion and a fiber optic positioning table portion; the front end of the optical fiber extension tube body is in fit and embedded connection with the embedded hole; the rear end of the optical fiber extension tube body is connected with the optical fiber positioning table part; the optical fiber extension pipe body is provided with an optical fiber extension pipe through which the optical fiber sleeve can penetrate; the optical fiber positioning table part is provided with an optical fiber positioning surface; and the optical fiber positioning surface is provided with an optical fiber sealing glue positioning groove which is communicated with the optical fiber extension pipeline and used for sealing glue to fix the optical fiber grating.
4. A miniature, wide range pressure sensor according to claim 3, wherein the position of said fiber optic line aperture is located in correspondence with the position of said fiber optic seal positioning slot.
5. The small, wide range pressure sensor of claim 1, wherein the diaphragm is in the shape of a circular sheet; the first clamping and embedding grooves and the second clamping and embedding grooves are cylindrical grooves; the groove diameter of the first clamping groove is larger than that of the second clamping groove.
6. The small, wide-range pressure sensor of claim 1, wherein the front tip comprises a cylindrical portion and a nut-like cylindrical portion; the cylindrical part is connected to the front end of the nut-shaped cylindrical part; the first clamping groove and the second clamping groove are both positioned on the cylindrical part.
7. The small, wide range pressure sensor of claim 2, wherein the front end of the housing has a mounting end adapted to be coupled into the mounting cavity.
8. The miniature, wide range pressure sensor of claim 7, wherein said mounting end is threadably connected to said mounting cavity.
9. The small, wide range pressure sensor of claim 1, wherein the diaphragm is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320409943.4U CN219736631U (en) | 2023-03-06 | 2023-03-06 | Small-sized large-range pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320409943.4U CN219736631U (en) | 2023-03-06 | 2023-03-06 | Small-sized large-range pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219736631U true CN219736631U (en) | 2023-09-22 |
Family
ID=88059702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320409943.4U Active CN219736631U (en) | 2023-03-06 | 2023-03-06 | Small-sized large-range pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219736631U (en) |
-
2023
- 2023-03-06 CN CN202320409943.4U patent/CN219736631U/en active Active
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