CN209745472U - Pressure switching module for calibrating optical fiber pressure sensor - Google Patents
Pressure switching module for calibrating optical fiber pressure sensor Download PDFInfo
- Publication number
- CN209745472U CN209745472U CN201920759707.9U CN201920759707U CN209745472U CN 209745472 U CN209745472 U CN 209745472U CN 201920759707 U CN201920759707 U CN 201920759707U CN 209745472 U CN209745472 U CN 209745472U
- Authority
- CN
- China
- Prior art keywords
- pressure
- pressure sensor
- optical fiber
- liquid flow
- valve body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
The utility model discloses a pressure switching module for optic fibre pressure sensor is markd, including valve body, connector, two at least sealed section of thick bamboo, at least one briquetting and at least one swivel nut. The valve body is internally provided with a liquid flow passage, the valve body is provided with at least two half through holes, the first ends of the half through holes are communicated with the liquid flow passage, and the second ends of the half through holes extend to the surface of the valve body and are threaded holes. The connector is fixed in the first end of liquid runner, and sealed section of thick bamboo has the cavity and is the through structure. The first end of the sealing barrel is in threaded connection with the threaded hole, and the cavity is communicated with the semi-through hole through the threaded hole. The pressing block is provided with a channel for the optical cable to pass through, the side walls of the pressing block and the threaded sleeve are provided with strip-shaped notches along the bus direction, and the threaded sleeve is used for being in threaded connection with the second end of the sealing cylinder. The utility model discloses compact structure, manufacturing are simple, convenient to use, when not influencing the calibration accuracy, can promote optic fibre pressure sensor's demarcation efficiency by a wide margin, reduce man-hour consumption and intensity of labour.
Description
Technical Field
the utility model relates to a pressure sensor calibration device technical field especially relates to a can mark a plurality of optic fibre pressure sensor's pressure switching module simultaneously.
Background
The pressure sensor is widely applied to various technical fields of ocean observation and monitoring. A pressure sensor is a device or apparatus that senses a pressure signal and converts the pressure signal into a usable output signal according to a certain rule. Most of the conventional pressure sensors are electronic pressure sensors, and can be divided into piezoresistive pressure sensors, piezoelectric pressure sensors and the like according to different measurement principles. With the rapid development of optical fiber sensing technology, various optical fiber pressure sensors used for ocean observation and monitoring are also in use.
the optical fiber pressure sensor is a sensor which converts seawater pressure into a measurable optical signal. Fiber optic pressure sensors are generally composed primarily of a pressure sensing element, an optical cable, an FC joint, and the like. One end of the optical cable is connected with the pressure sensing element, and the other end is connected with the FC joint. The optical fiber pressure sensor has the working principle that light beams incident from a light source are sent into a pressure sensing element through an optical cable, the wavelength of the light beams is changed under the interaction of the inside of the pressure sensing element and the external pressure to form optical signals which can be modulated, the optical signals are sent back through the optical cable, and the measured pressure parameters are obtained after the demodulation of a demodulator. Compared to electronic pressure sensors, fiber optic pressure sensors have many advantages: anti-interference performance against electromagnetism and antigenic radiation; fine diameter, soft texture, light weight; insulating, non-inductive electrical performance; chemical properties of water resistance, high temperature resistance, corrosion resistance and the like.
The optical fiber pressure sensor must be calibrated before leaving the factory, and the calibration process generally follows the following steps: the pressure sensing element is connected with the pressure calibration equipment through the switching tool, and the FC joint is connected with the demodulator. Starting from 0MPa, recording the characterization pressure value of the pressure calibration equipment and the wavelength data of the optical fiber pressure sensor; then, gradually boosting the pressure of the pressure calibration equipment, and stopping boosting every time 1MPa is added, and recording the characterization pressure value and the wavelength data; and stopping boosting until the pressure is boosted to a pressure value specified by the index range of the optical fiber pressure sensor. Then, the pressure is reduced at intervals of 1MPa until the pressure reaches 0MPa, and the representation pressure value and the wavelength data are continuously and sequentially recorded. And respectively performing curve fitting on the pressure values recorded in the pressure increasing/reducing process and the corresponding wavelength data to obtain the calibration coefficient of the optical fiber pressure sensor. And substituting the calibration coefficient and the wavelength data recorded in the pressure reduction/pressure increase process into a calibration formula to obtain a pressure value measured by the optical fiber pressure sensor, and comparing the pressure value with the characterization pressure value of the pressure calibration equipment to obtain the calibration error of the optical fiber pressure sensor.
The length of the optical cable of the optical fiber pressure sensor is mainly determined by the distance between the application environment of the optical fiber pressure sensor and the demodulator. After the optical fiber pressure sensor is calibrated, the optical cable of the optical fiber pressure sensor is generally not lengthened or shortened, because the optical cable needs to be welded no matter the optical cable is lengthened or shortened, the phenomenon of optical signal attenuation can be generated during the welding of the optical cable, and the measurement precision is influenced; in addition, stress and sealing protection are required to be carried out on a welding point after the optical cable is welded, so that the risks of breakage of the optical cable and corrosion of seawater are increased. Therefore, the longest optical fiber tail cable of the optical fiber pressure sensor can reach hundreds of meters or even kilometers during calibration.
According to different sealing forms, the common structural forms of the high-precision optical fiber pressure sensor include a cylindrical surface sealing type and an end surface sealing type. The cylindrical surface sealing type optical fiber pressure sensor is cylindrical in shape, and a sealing ring groove is formed in the outer portion of the cylinder and used for installing an O-shaped ring. The end part of the end face sealing type optical fiber pressure sensor is provided with a fastening thread, and a sealing gasket is arranged at the joint of the fastening thread and the sensor.
Because there are above-mentioned differences in structural style and measurement principle between optical fiber pressure sensor and traditional pressure sensor, therefore the calibration demand of optical fiber pressure sensor can't be adapted to common adapter that is used for pressure sensor to calibrate. In addition, when the optical fiber pressure sensors are produced in batches, calibration work of a large number of optical fiber pressure sensors needs to be carried out, and if a method that one pressure calibration device is used for calibrating only one optical fiber pressure sensor at a time is still adopted, the problems of large workload, high labor intensity, low device utilization rate and the like exist. Therefore, it is very necessary to develop a pressure adapter module capable of calibrating a plurality of optical fiber pressure sensors at the same time, so as to improve the calibration efficiency of the optical fiber pressure sensors and reduce the labor consumption and labor intensity. In addition, in order to meet the calibration requirements of the optical fiber pressure sensors with different structural forms, the pressure switching module has certain universality and can be compatible with the optical fiber pressure sensors with the two structural forms.
Because friction exists between the pressure medium used by the pressure calibration equipment and the internal pipeline of the pressure switching module, certain pressure loss can be generated, and the calibration precision is influenced. The main factors affecting the pressure loss include: pipe roughness and length. The length of the pipeline is mainly determined by the number of sensor installation interfaces reserved on the pressure switching module. The number of the installation interfaces is increased, the longer the pipeline length is, the larger the pressure loss is, and the lower the calibration precision is, so that the number of the sensor installation interfaces reserved on the pressure switching module is not suitable to be too large.
However, for the optical fiber pressure sensor with lower measurement accuracy index requirement, the pressure loss caused by the pressure switching module has less influence on the calibration result of the sensor. Under the condition that the roughness of the pipeline is determined, a reserved sensor mounting interface can be properly added, and the calibration efficiency is improved.
Therefore, in order to meet the calibration requirements of optical fiber pressure sensors with different precisions, the processing precision of the pressure switching module is improved, the processing difficulty is reduced, and the pressure switching module has certain expansibility.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a pressure switching module suitable for a plurality of optic fibre pressure sensor are markd simultaneously for solve when demarcating big batch optic fibre pressure sensor, current pressure sensor is markd with the problem that the demand can't be satisfied to the adapter.
In order to achieve the above object, the utility model provides a following scheme:
The utility model discloses a pressure switching module for optic fibre pressure sensor is markd, include:
The valve body is internally provided with a liquid flow passage, the first end of the liquid flow passage extends to the surface of the valve body, the valve body is provided with at least two half through holes, the first ends of the half through holes are communicated with the liquid flow passage, and the second ends of the half through holes extend to the surface of the valve body and are threaded holes;
The connector is fixed at the first end of the liquid flow channel and is used for being hermetically connected with an output pipe connector of the pressure calibration equipment, so that the liquid flow channel is communicated with an output pipe of the pressure calibration equipment;
The sealing device comprises at least two sealing cylinders, a screw hole and a half through hole, wherein each sealing cylinder is provided with a cavity and is of a through structure, the first end of each sealing cylinder is in threaded connection with the corresponding threaded hole, the cavity is communicated with the corresponding half through hole through the screw hole, the cavity is used for accommodating a pressure sensing element of the optical fiber pressure sensor, the screw hole can be in threaded connection with a stud of the end face sealing type optical fiber pressure sensor, the side wall of the cavity can be in sealed connection with a cylindrical sealing ring of the cylindrical sealing type optical fiber pressure sensor, and the second end of each sealing cylinder is provided;
The pressing block is provided with a channel for the optical cable to pass through, the side wall of the pressing block is provided with a strip-shaped notch along the bus direction, and the pressing block is used for abutting against one end face of the optical cable connected to the pressure sensing element of the cylindrical sealing type optical fiber pressure sensor;
The side wall of the threaded sleeve is provided with a strip-shaped notch along the bus direction, the threaded sleeve is in threaded connection with the second end of the sealing cylinder for accommodating the pressure sensing element of the cylindrical sealing type optical fiber pressure sensor, and the threaded sleeve is used for enabling the pressing block to press the pressure sensing element of the cylindrical sealing type optical fiber pressure sensor.
Preferably, the valve further comprises a conduction pipe and an end cover, wherein the first end of the liquid flow passage is provided with an internal thread, the connector is in threaded connection with the first end of the liquid flow passage, the second end of the liquid flow passage extends to the surface of the valve body, the number of the valve bodies is n, the number of the conduction pipes is n-1, the number of the end cover is one, n is larger than or equal to 2, one end of the conduction pipe is used for being inserted into the second end of the liquid flow passage on one valve body and is in sealed connection, the other end of the conduction pipe is used for being in threaded connection with the first end of the liquid flow passage on the other valve body, the two adjacent valve bodies are locked through a fastener, and the end cover is used for sealing the second end of the liquid flow passage of one.
Preferably, the valve body comprises a left panel, a cross block and a right panel, the left panel and the right panel are respectively and integrally connected with two ends of the cross block, a first end of the liquid flow channel is located on the left panel, a second end of the liquid flow channel is located on the right panel, and the liquid flow channel is coaxial with the cross block.
Preferably, the cross block is provided with four ribs extending longitudinally, the second ends of the half through holes are positioned on the side surfaces of the ribs far away from the axis of the cross block, and the axis of the half through holes is perpendicular to the axis of the cross block.
preferably, the number of the half through holes is six, and every two half through holes are positioned in one rib plate.
Preferably, the end cap has a cylindrical protrusion thereon for being inserted into and sealingly coupled with a second end of the liquid flow passage of one of the valve bodies at the end portion.
Preferably, two end faces of the connector, the right end face of the valve body and a plane on the sealing barrel for abutting against the valve body are provided with annular grooves, and sealing rings are arranged in the annular grooves.
Preferably, the optical fiber pressure sensor further comprises a cylindrical plug, the shape of the cylindrical plug is consistent with that of a pressure sensing element of the cylindrical sealing type optical fiber pressure sensor, a sealing ring is arranged in an annular groove in the cylindrical surface of the cylindrical plug, and the cylindrical plug is used for being fixed in one of the sealing cylinders through one of the pressing blocks and one of the threaded sleeves.
The utility model discloses for prior art gain following technological effect:
The utility model relates to a pressure switching module for optical fiber pressure sensor marks when using, after adorning optical fiber pressure sensor on each switching anchor clamps, with the output tube connection of connector and pressure calibration equipment, can realize the demarcation work to a plurality of optical fiber pressure sensor. After calibration is completed, the calibrated optical fiber pressure sensor can be quickly taken out only by unscrewing the threaded sleeve, and a new sensor is replaced. When necessary, two or more pressure switching modules can be connected in series by the conduction pipe, so that the number of the sensors calibrated at the same time is increased, and the working efficiency is improved.
the utility model discloses compact structure, manufacturing are simple, convenient to use, when not influencing the calibration accuracy, can promote optic fibre pressure sensor's demarcation efficiency by a wide margin, reduce man-hour consumption and intensity of labour.
drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a pressure adapter module for calibrating an optical fiber pressure sensor;
FIG. 2 is an axial view of the valve body structure;
FIG. 3 is a front sectional view of the valve body;
FIG. 4 is a top sectional view of the valve body;
FIG. 5 is a front sectional view of the pressure adapter module mounting two different configurations of pressure sensors;
FIG. 6 is a schematic diagram of a cylindrical sealing type optical fiber pressure sensor;
FIG. 7 is a schematic diagram of an end-sealed optical fiber pressure sensor;
FIG. 8 is a front sectional view of two pressure adapter modules connected in series;
FIG. 9 is a serial axial view of the pressure transition module;
description of reference numerals: 1. a connector; 2. a valve body; 3. transferring the clamp; 4. an end cap; 5. a cylindrical surface sealing type optical fiber pressure sensor; 6. an end face sealing type optical fiber pressure sensor; 7. a conduction pipe; 8. a cylindrical plug; 9. a screw; 20. screw holes; 21. a left end face; 22. an upper end surface; 23. a right end face; 24. a rear end face; 25. a front end face; 26. a liquid flow passage; 27. a half via; 28. a threaded orifice; 29. a light hole; 31. a sealing cylinder; 32. a threaded sleeve; 33. briquetting; 34. a screw hole; 35. a cavity; 36. a strip-shaped notch; 51. a pressure-sensitive element; 52. an optical cable; 53.FC connectors; o-ring mounting grooves; 55. a gasket mounting location; 56. a stud.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
the utility model aims at providing a pressure switching module suitable for a plurality of optic fibre pressure sensor are markd simultaneously for solve when demarcating big batch optic fibre pressure sensor, current pressure sensor is markd with the problem that the demand can't be satisfied to the adapter.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 to 9, the present embodiment provides a pressure adapter module for calibrating an optical fiber pressure sensor, which includes a valve body 2, a connector 1, at least two sealing cylinders 31, at least one pressing block 33, and at least one thread insert 32.
wherein, the valve body 2 has a liquid flow passage 26 inside, and a first end of the liquid flow passage 26 extends to the surface of the valve body 2. At least two half through holes 27 are formed in the valve body 2, a first end of each half through hole 27 is communicated with the liquid flow passage 26, and a second end of each half through hole 27 extends to the surface of the valve body 2 and is a threaded hole 28. The connector 1 is fixed at a first end of the liquid channel 26, and the connector 1 is used for being hermetically connected with an output pipe connector of the pressure calibration device, so that the liquid channel 26 is communicated with an output pipe of the pressure calibration device. The sealing cylinder 31 has a cavity 35 and is a through structure, a first end of the sealing cylinder 31 is in threaded connection with the threaded hole 28, the cavity 35 is communicated with the semi-through hole 27 through a threaded hole 34, the cavity 35 is used for accommodating a pressure sensing element 51 of the optical fiber pressure sensor, the threaded hole 34 can be in threaded connection with a stud 56 of the end face sealing type optical fiber pressure sensor 6, the side wall of the cavity 35 can be in sealing connection with a cylindrical sealing ring of the cylindrical sealing type optical fiber pressure sensor 5, and a second end of the sealing cylinder 31 is provided with an external thread. The pressing block 33 is provided with a channel for the optical cable 52 to pass through, the side wall of the pressing block 33 is provided with a strip-shaped notch 36 along the bus direction, and the pressing block 33 is used for abutting against one end face of the pressure sensing element 51 of the cylindrical sealing type optical fiber pressure sensor 5, which is connected with the optical cable 52. The side wall of the screw sleeve 32 is provided with a strip-shaped notch 36 along the bus direction, the screw sleeve 32 is used for being in threaded connection with the second end of the sealing cylinder 31 for accommodating the pressure sensing element 51 of the cylindrical sealing type optical fiber pressure sensor 5, and the screw sleeve 32 is used for enabling the pressing block 33 to press the pressure sensing element 51 of the cylindrical sealing type optical fiber pressure sensor 5.
When the pressure switching module of the embodiment is used, corresponding installation modes are selected according to different optical fiber pressure sensors needing to be calibrated. For the end-sealed type optical fiber pressure sensor 6, it includes a stud 56, a pressure-sensitive element 51, an optical cable 52, and an FC joint 53 connected in this order. The end surface of the pressure sensing element 51 for receiving the stud 56 is generally a gasket receiving location 55 for receiving a gasket that is fitted over the stud 56. When the end-face-sealed fiber pressure sensor 6 is connected to the valve body 2, the pressure-sensitive element 51 of the end-face-sealed fiber pressure sensor 6 is simply placed in the cavity 35 of the seal cylinder 31, and the pressure-sensitive element 51 is rotated until the pressure-sensitive element 51 and the corresponding seal cylinder 31 clamp the gasket. With the cylinder sealing type optical fiber pressure sensor 5, which includes a pressure-sensitive element 51, an optical cable 52, and an FC joint 53 connected in this order, the pressure-sensitive element 51 is provided at its side surface with an O-ring mounting groove 54 in which an O-ring is mounted. When the cylindrical sealing type optical fiber pressure sensor 5 is connected with the valve body 2, the pressure sensing element 51 of the cylindrical sealing type optical fiber pressure sensor 5 needs to be placed in the cavity 35 of the sealing cylinder 31, the optical cable 52 enters the channel for the optical cable 52 to pass through the strip-shaped notch 36 of the pressing block 33, the optical cable 52 enters the threaded sleeve 32 through the strip-shaped notch 36 of the threaded sleeve 32, and the pressing block 33 and the pressure sensing element 51 of the cylindrical sealing type optical fiber pressure sensor 5 are pressed downwards together by rotating the threaded sleeve 32. After the screw sleeve 32 and the sealing barrel 31 are locked, the screw sleeve 32 and the strip-shaped notch 36 of the pressing block 33 are staggered to prevent the optical cable 52 from sliding out of the strip-shaped notch 36. The width of the strip-shaped notch 36 is slightly larger than the diameter of the optical cable 52, so that the pressing block 33 and the thread insert 32 can be quickly sleeved on the optical cable 52 without penetrating the pressing block 33 and the thread insert 32 from the FC joint 53 at the tail end of the optical cable 52 of hundreds of meters.
Because the pressure switching module of the embodiment is provided with at least two sealing cylinders 31, a plurality of optical fiber pressure sensors can be simultaneously installed, and the calibration efficiency is improved. Different installation modes can be selected according to different types of the optical fiber pressure sensors needing to be calibrated. The end-face-sealed optical fiber pressure sensor 6 can be directly mounted by rotating the pressure-sensitive element 51, the adapter jig 3 is the sealing cylinder 31, the cylindrical-sealed optical fiber pressure sensor 5 can be mounted by the pressing block 33 and the screw sleeve 32, and the adapter jig 3 is the sealing cylinder 31, the pressing block 33 and the screw sleeve 32. Therefore, the pressure switching module of the embodiment can be compatible with two types of optical fiber pressure sensors, improves the utilization rate of equipment and has better universality. After optical fiber pressure sensors are arranged on the switching clamps 3, the connector 1 is connected with an output pipe of the pressure calibration equipment, so that calibration of a plurality of optical fiber pressure sensors can be realized. After calibration is completed, the calibrated optical fiber pressure sensor can be quickly taken out only by unscrewing the threaded sleeve 32, and a new sensor is replaced.
when a pressure adapter module cannot meet the installation requirement of the optical fiber pressure sensor, in order to improve the calibration efficiency, the embodiment further comprises a conduction pipe 7 and an end cover 4. The first end of the liquid flow passage 26 has an internal thread, the connector 1 is screwed with the first end of the liquid flow passage 26, and the second end of the liquid flow passage 26 extends to the surface of the valve body 2. The number of the valve bodies 2 is n, the number of the conduction pipes 7 is n-1, the number of the end covers 4 is one, and n is more than or equal to 2. One end of the conducting pipe 7 is a cylindrical surface for inserting and sealing connection with a second end of the liquid flow passage 26 of the valve body 2. The other end of the conduit 7 is threaded for threaded engagement with a first end of a fluid passage 26 in the other valve body 2. Two adjacent valve bodies 2 are locked by a fastener, the end cover 4 is used for sealing the second end of the liquid flow passage 26 of one valve body 2 at the end, and the end cover 4 is a flange cover.
a plurality of pressure switching modules are connected in series through the conduction pipe 7, and the calibration requirements of any number of optical fiber pressure sensors can be met. The first end of the liquid flow passage 26 is provided with an internal thread, so that the conduction pipe 7 and the connector 1 can be quickly assembled and disassembled in a rotating mode, and the calibration efficiency is improved. In order to realize the serial assembly, the second end of the liquid flow passage 26 extends to the surface of the valve body 2, and when the number of the pressure switching modules is only one, the second end of the liquid flow passage 26 needs to be sealed by the end cover 4.
In order to reduce the weight of the valve body 2, the valve body 2 of the present embodiment includes a left panel, a cross block, and a right panel, which are integrally connected to both ends of the cross block, respectively. The first end of the liquid flow channel 26 is located on the left panel and the second end of the liquid flow channel 26 is located on the right panel, the liquid flow channel 26 being coaxial with the cross block. The valve body 2 is a metal block, and a cross block in the middle of the valve body 2 is formed by milling. The cross block is provided with four rib plates extending longitudinally, the second ends of the half through holes 27 are positioned on the side surfaces of the rib plates far away from the axle center of the cross block, and the axle center of the half through holes 27 is perpendicular to the axle center of the cross block. The right panel is provided with a screw hole 20, the left panel is provided with a unthreaded hole 29 which is opposite to the screw hole 20, and the left panel and the right panel of two adjacent valve bodies 2 can be locked by a screw 9.
In this embodiment, the number of the half through holes 27 is six, the number of the corresponding sealing cylinders 31 is also six, the number of the pressing blocks 33 and the number of the thread sleeves 32 are selected according to requirements, and every two half through holes 27 are located in one rib plate. Taking the perspective of fig. 1, 2 and 9 as an example, the second ends of the half through holes 27 are respectively located on the front end surface 25, the rear end surface 24 and the upper end surface 22 of the valve body 2, the connector 1 is mounted on the left end surface 21 of the valve body 2, and the end cap 4 is mounted on the right end surface 23 of the valve body 2.
In order to improve the sealing effect of the end cover 4, the end cover 4 of the present embodiment has a cylindrical protrusion for inserting and sealing into the second end of the liquid flow passage 26 of one of the valve bodies 2 at the end.
in order to improve the sealing performance of other connecting positions, annular grooves are formed in the two end faces of the connecting head 1, the right end face 23 of the valve body 2 and the plane of the sealing cylinder 31, which is used for abutting against the valve body 2, and sealing rings are arranged in the annular grooves.
In this embodiment, the number of the half through holes 27 is six, and when the number of the optical fiber pressure sensors actually required to be calibrated is not an integral multiple of six, the redundant half through holes 27 need to be blocked. For this purpose, the present embodiment further includes a cylindrical plug 8, the shape of the cylindrical plug 8 is the same as the shape of the pressure sensing element 51 of the cylinder-sealed optical fiber pressure sensor 5, a sealing ring is also provided in an annular groove on the cylindrical surface of the cylindrical plug 8, the cylindrical plug 8 is configured to be fixed in one of the sealing cylinders 31 by a pressing block 33 and a screw sleeve 32, where the pressing block 33 and the screw sleeve 32 are installed in the same manner as the pressing block 33 and the screw sleeve 32 corresponding to the cylinder-sealed optical fiber pressure sensor 5.
the principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (8)
1. A pressure switching module for calibrating a fiber optic pressure sensor, comprising:
the valve body is internally provided with a liquid flow passage, the first end of the liquid flow passage extends to the surface of the valve body, the valve body is provided with at least two half through holes, the first ends of the half through holes are communicated with the liquid flow passage, and the second ends of the half through holes extend to the surface of the valve body and are threaded holes;
The connector is fixed at the first end of the liquid flow channel and is used for being hermetically connected with an output pipe connector of the pressure calibration equipment, so that the liquid flow channel is communicated with an output pipe of the pressure calibration equipment;
the sealing device comprises at least two sealing cylinders, a screw hole and a half through hole, wherein each sealing cylinder is provided with a cavity and is of a through structure, the first end of each sealing cylinder is in threaded connection with the corresponding threaded hole, the cavity is communicated with the corresponding half through hole through the screw hole, the cavity is used for accommodating a pressure sensing element of the optical fiber pressure sensor, the screw hole can be in threaded connection with a stud of the end face sealing type optical fiber pressure sensor, the side wall of the cavity can be in sealed connection with a cylindrical sealing ring of the cylindrical sealing type optical fiber pressure sensor, and the second end of each sealing cylinder is provided;
The pressing block is provided with a channel for the optical cable to pass through, the side wall of the pressing block is provided with a strip-shaped notch along the bus direction, and the pressing block is used for abutting against one end face of the optical cable connected to the pressure sensing element of the cylindrical sealing type optical fiber pressure sensor;
The side wall of the threaded sleeve is provided with a strip-shaped notch along the bus direction, the threaded sleeve is in threaded connection with the second end of the sealing cylinder for accommodating the pressure sensing element of the cylindrical sealing type optical fiber pressure sensor, and the threaded sleeve is used for enabling the pressing block to press the pressure sensing element of the cylindrical sealing type optical fiber pressure sensor.
2. The pressure adapter module for fiber optic pressure sensor calibration according to claim 1, it is characterized by also comprising a conduction pipe and an end cover, wherein the first end of the liquid flow passage is provided with internal threads, the connector is in threaded connection with the first end of the liquid flow passage, the second end of the liquid flow passage extends to the surface of the valve body, n valve bodies, n-1 conduction pipes, one end cover, n is more than or equal to 2, one end of the conduction pipe is inserted into the second end of the liquid flow passage on the valve body and is connected with the second end in a sealing way, the other end of the conduction pipe is in threaded connection with the first end of the liquid flow channel on the other valve body, the two adjacent valve bodies are locked by a fastening piece, the end cap is configured to seal a second end of the liquid flow passage of one of the valve bodies at the end.
3. The pressure switching module for calibrating an optical fiber pressure sensor according to claim 2, wherein the valve body comprises a left panel, a cross block and a right panel, the left panel and the right panel are respectively integrally connected to two ends of the cross block, a first end of the liquid flow channel is located on the left panel, a second end of the liquid flow channel is located on the right panel, and the liquid flow channel is coaxial with the cross block.
4. the pressure adapter module for calibration of fiber optic pressure sensors of claim 3, wherein said cross block has four ribs extending longitudinally, the second ends of said half through holes are located on the sides of said ribs away from the axis of said cross block, the axis of said half through holes is perpendicular to the axis of said cross block.
5. The pressure adapter module for calibration of fiber optic pressure sensors of claim 4, wherein said half through holes are six, and two of said half through holes are located in one of said ribs.
6. The pressure adapter module for calibrating a fiber optic pressure sensor of claim 3, wherein said end cap has a cylindrical protrusion thereon for inserting into and sealing engagement with a second end of said liquid flow passage of one of said valve bodies at the end.
7. the pressure adapter module for calibrating an optical fiber pressure sensor according to claim 3, wherein two end faces of the connector, the right end face of the valve body, and a plane of the sealing cylinder for abutting against the valve body are provided with annular grooves, and sealing rings are arranged in the annular grooves.
8. The pressure adapter module for calibrating an optical fiber pressure sensor according to claim 1, further comprising a cylindrical plug having a shape corresponding to that of the pressure sensing element of the cylindrically sealed optical fiber pressure sensor, wherein a sealing ring is disposed in an annular groove on a cylindrical surface of the cylindrical plug, and the cylindrical plug is configured to be fixed in one of the sealing cylinders by one of the pressing blocks and one of the threaded sleeves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920759707.9U CN209745472U (en) | 2019-05-24 | 2019-05-24 | Pressure switching module for calibrating optical fiber pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920759707.9U CN209745472U (en) | 2019-05-24 | 2019-05-24 | Pressure switching module for calibrating optical fiber pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209745472U true CN209745472U (en) | 2019-12-06 |
Family
ID=68723158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920759707.9U Active CN209745472U (en) | 2019-05-24 | 2019-05-24 | Pressure switching module for calibrating optical fiber pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209745472U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082030A (en) * | 2019-05-24 | 2019-08-02 | 国家海洋技术中心 | A kind of pressure interconnecting module for fibre optic compression sensor calibration |
| CN111740270A (en) * | 2020-07-30 | 2020-10-02 | 中国工程物理研究院总体工程研究所 | Connector adapter of high-temperature radiation-resistant waterproof TNC (TNC) switching M5 socket based on PEEK (polyether-ether-ketone) |
-
2019
- 2019-05-24 CN CN201920759707.9U patent/CN209745472U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082030A (en) * | 2019-05-24 | 2019-08-02 | 国家海洋技术中心 | A kind of pressure interconnecting module for fibre optic compression sensor calibration |
| CN110082030B (en) * | 2019-05-24 | 2024-03-08 | 国家海洋技术中心 | Pressure switching module for calibrating optical fiber pressure sensor |
| CN111740270A (en) * | 2020-07-30 | 2020-10-02 | 中国工程物理研究院总体工程研究所 | Connector adapter of high-temperature radiation-resistant waterproof TNC (TNC) switching M5 socket based on PEEK (polyether-ether-ketone) |
| CN111740270B (en) * | 2020-07-30 | 2024-05-07 | 中国工程物理研究院总体工程研究所 | Connector adapter of high-temperature irradiation-resistant waterproof TNC (TNC) adapter M5 socket |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209745472U (en) | Pressure switching module for calibrating optical fiber pressure sensor | |
| EP0205789A2 (en) | Pressure and temperature sensor for fluidic systems | |
| CN104122029A (en) | New-structured air pressure differential sensor assembly | |
| CN110082030B (en) | Pressure switching module for calibrating optical fiber pressure sensor | |
| CN117307841A (en) | Perception structure integrated flange with parameter monitoring function | |
| CN202025111U (en) | Seal port for optical fiber butting | |
| CN101021599A (en) | Universal separate prefabricated plugging optical fiber grating sensor and producing and using method thereof | |
| CN110595702B (en) | Double-oil-pipe pumping pressure tool and hydraulic test method | |
| CN205958169U (en) | Serial -type fiber grating pressure sensor | |
| CN112254662B (en) | Three-dimensional strain measurement device and method suitable for deep fractured rock mass | |
| CN210108268U (en) | Elastic displacement optical fiber sensor | |
| CN204988601U (en) | Flat membrane pressure sensor | |
| CN214702571U (en) | Pressure transmitter capable of being adjusted to zero externally | |
| CN112612086A (en) | Gym optical cable connector with assembling function and stable connection and use method thereof | |
| CN214743909U (en) | Anti-interference joint of hydraulic flow sensor | |
| CN113607192B (en) | Indirect connection type optical fiber gyro assembly testing device | |
| CN110161281A (en) | A kind of Optical-Fiber Flowing Rate Sensor | |
| CN213041437U (en) | Pressure transmitter is piecing devices for calibration | |
| CN218272848U (en) | Optical cable sealing device | |
| CN210424163U (en) | Novel internal and external screw plug | |
| CN215261649U (en) | Fiber grating strain sensor for monitoring concrete in water delivery tunnel | |
| CN213779157U (en) | Mass flowmeter gas access switching device | |
| CN218765646U (en) | Temperature sensor protection tube | |
| CN220366919U (en) | High temperature resistant thermocouple | |
| CN209945607U (en) | Oil-water separator for preventing rubber sleeve from being damaged |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |