CN112729658A - Displacement type ultrahigh pressure sensor - Google Patents
Displacement type ultrahigh pressure sensor Download PDFInfo
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- CN112729658A CN112729658A CN202011530654.7A CN202011530654A CN112729658A CN 112729658 A CN112729658 A CN 112729658A CN 202011530654 A CN202011530654 A CN 202011530654A CN 112729658 A CN112729658 A CN 112729658A
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- pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
- G01L7/02—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges
- G01L7/026—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges with optical transmitting or indicating means
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- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a displacement type ultrahigh pressure sensor which comprises a high pressure cylinder, a pressure transmission rod, a connecting cylinder, a low pressure cylinder, a round rod, a laser displacement sensor, a ring, a cylinder and an elastomer, wherein the elastomer is of a thick-wall cylinder structure with an end socket. When the pressure sensor works, pressure is converted into displacement through the elastic body, the axial displacement of the elastic body is measured by using the high-precision displacement sensor, and the relation between the pressure and the displacement is established. The performance of the sensor is determined by the material characteristics of the elastomer, the working pressure range can reach more than 1000MPa by selecting high-strength steel, and the sensor is high in precision, strong in anti-interference capability and good in stability and is suitable for static ultrahigh pressure measurement.
Description
Technical Field
The invention belongs to the field of ultrahigh pressure measurement, and particularly relates to a displacement type ultrahigh pressure sensor.
Background
In modern industrial production, static ultrahigh pressure applications of more than 1000MPa, such as synthetic crystals and hydrostatic extrusion, are widely used. Therefore, the development of the corresponding ultrahigh pressure sensor has important significance.
Chinese patent CN200720032183.0 discloses a strain square tube pressure sensor, which measures the deformation of an object under stress through a strain gauge, and has high precision but poor anti-interference capability.
Chinese patent CN201320699023.7 discloses a simple and accurate spring tube pressure meter, which converts the deformation of object under stress into the deflection of pointer, and has strong anti-interference ability, but low precision, and is difficult to realize the pressure measurement above 1000 MPa.
Disclosure of Invention
The invention aims to provide a displacement type ultrahigh pressure sensor, which solves the problem that an elastic deformation type pressure sensor is high in precision, strong in anti-interference capability and high in measuring range upper limit and cannot meet the requirements at the same time.
The technical solution for realizing the purpose of the invention is as follows: a displacement type ultrahigh pressure sensor can bear a high pressure medium of more than 1000MPa and comprises a high pressure cylinder, a pressure transmission rod, a connecting cylinder, a low pressure cylinder, a round rod, a laser displacement sensor, a ring, a cylinder and an elastic body.
The pressure source is connected to high-pressure section of thick bamboo one end, and the other end is connected with the one end of connecting cylinder, and the center of high-pressure section of thick bamboo is the second order through-hole, and be close to pressure source one side be the pressure port, be close to connecting cylinder one side be the mounting hole.
One end of the pressure transmission rod extends into the mounting hole of the high-pressure cylinder to form a sealed high-pressure cavity with the high-pressure cylinder, the other end of the pressure transmission rod penetrates through the connecting cylinder to extend into the low-pressure cylinder, and the end face of the pressure transmission rod extending into the high-pressure cylinder is provided with a cross groove for the circulation of high-pressure media.
One end of the low-pressure cylinder is fixedly connected with the other end of the connecting cylinder, the low-pressure cylinder is not in contact with the high-pressure cylinder, so that a cavity is formed in the connecting cylinder, and the other end of the low-pressure cylinder is fixedly connected with one end of the cylinder.
The elastomer is arranged in the low-pressure cylinder, one end of the elastomer is contacted with the pressure transmission rod, and the other end of the elastomer is provided with a deep blind hole from the center of the end surface.
One end of the round rod is connected with the deep blind hole of the elastomer in an adhesive mode, and the elastomer and the low-pressure cylinder are fixedly connected into a whole through the nut.
The ring is fixed at the other end of the cylinder.
The laser displacement sensor is fixed on the outer wall surface of the circular ring, and light rays of the laser displacement sensor can irradiate the circular rod through the center of the circular ring.
High-pressure medium enters the high-pressure cavity through a pressure hole of the high-pressure cylinder, working pressure is indirectly applied to the elastic body through the pressure transmission rod to enable the elastic body to generate axial displacement, the axial displacement of the round rod is measured through the laser displacement sensor, the relation between the pressure and the displacement is established, and the measurement of the pressure is achieved.
Compared with the prior art, the invention has the remarkable advantages that:
(1) the measurement range is large and can reach more than 1000 MPa.
(2) Elastomers of different materials can be selected to meet different range and precision requirements.
(3) The pressure source is separated from the elastomer by the pressure transmission rod, so that the influence of temperature is reduced.
(4) Simple structure, installation and maintenance are convenient.
Drawings
Fig. 1 is a schematic structural diagram of the displacement type ultra-high pressure sensor according to the present invention.
Detailed Description
The present invention is described in further detail below with reference to the attached drawing figures.
Referring to fig. 1, the displacement type ultra-high pressure sensor according to the present invention includes a high pressure cylinder 1, a pressure transmission rod 2, a connecting cylinder 3, a low pressure cylinder 4, a round rod 5, a nut 6, a bolt 7, a laser displacement sensor 8, a ring 9, a cylinder 10, an elastic body 11, and a high pressure sealing member 12.
The external screw thread has all been processed at 1 both ends of high-pressure section of thick bamboo, and the pressure source is connected to one end, and the terminal surface lateral wall of being connected with the pressure source is equipped with a boss that has 10 conical surfaces, guarantees the sealing performance of both junctions, and the other end is connected with connecting cylinder 3, and the center of high-pressure section of thick bamboo 1 is the second order through-hole, and the pressure hole that is close to pressure source one side for the passage of high-pressure medium, be close to connecting cylinder 3 one side the mounting hole for installation pressure transmission pole 2. The high-pressure cylinder 1 is made of ultrahigh-strength steel and subjected to self-reinforcing treatment, and can bear high pressure of more than 1000 MPa.
The pressure transmission rod 2 separates a pressure source from the elastic body, reduces the influence of temperature on a measurement result, transmits working pressure to the elastic body 11, is provided with a cross groove at one end close to the high-pressure cylinder 1 for the circulation of high-pressure medium, is provided with a high-pressure sealing element 12 at the part close to the cross groove, and forms a sealed high-pressure cavity with the high-pressure cylinder 1. The material of the pressure transmission rod 2 is tungsten carbide with high rigidity.
The connecting cylinder 3 is used for connecting the high-pressure cylinder 1 and the low-pressure cylinder 4, a cavity is formed in the middle, a through hole is formed in the radial direction of the connecting cylinder 3, when a high-pressure medium leaks, the high-pressure medium flows out of the through hole and cannot flow into the low-pressure cylinder 4. The high-pressure medium is mostly high-pressure oil.
One end of the low-pressure cylinder 4 is connected with the connecting cylinder 3 through external threads, the other end of the low-pressure cylinder is fixedly connected with the cylinder 10, and a central cavity is used for installing the elastic body 11.
The round rod 5 is connected with the inner hole of the elastic body 11 in an adhesive mode and transmits axial displacement.
The nut 6 is used for fixedly connecting the round rod 5, the elastic body 11 and the low-pressure cylinder 4 into a whole.
The bolt 7 is used for connecting the cylinder 10 and the ring 9 and adjusting the included angle.
The laser displacement sensor 8 is used for measuring the axial displacement of the round rod 5.
The circular ring 9 is of an axisymmetric structure, so that light rays of the laser displacement sensor 8 can pass through the center of the circular ring 9; 3 through holes which are uniformly distributed are circumferentially processed and are used for connecting the cylinder 10; the outer surface is processed into a circular arc surface.
One end of the cylinder 10 is sleeved on the surface of the low-pressure cylinder 4; the inner surface of the other end is processed into a conical surface which is matched with the arc surface of the circular ring 9; 3 evenly distributed screw holes are processed in the circumferential direction and are connected with a circular ring 9 through bolts 7.
The bolt 7 is used for connecting the cylinder 10 and the ring 9 and adjusting the included angle.
The elastic body 11 is of an axisymmetric structure, and the end part of the elastic body is provided with a conical surface which is matched with the conical surface of the low-pressure cylinder 4 to ensure the centering property; a blind hole is processed inside for connecting the round rod 5; axial displacement occurs when pressure is applied. The bearing capacity of the elastomer, the axial displacement under the same structure and load and the performance of the sensor can be changed by selecting materials with different properties (high strength and low rigidity).
The high-pressure sealing element 12 is formed by combining a triangular soft steel ring and an O-shaped rubber ring, and the sealing performance between the pressure transmission rod 2 and the high-pressure cylinder 1 is ensured.
The installation step:
firstly, a high-pressure sealing element 12 is arranged outside a pressure transmission rod 2 and then is placed in a mounting hole of a high-pressure cylinder 1 to form a high-pressure cavity;
then one end of the round rod 5 is connected with the deep blind hole of the elastic body 11 in an adhesive mode, the elastic body 11 is inserted into the cavity in the center of the low-pressure cylinder 4, and the nut 6 is screwed on.
The high-pressure cartridge 1 and the low-pressure cartridge 4 are then mounted on the connecting cartridges 3, respectively.
And finally, sleeving the cylinder 10 on the low-pressure cylinder 4, threading the bolt 7 through a through hole of the circular ring 9 and screwing the bolt on the cylinder 10, and installing the laser displacement sensor 8 on the circular ring 9. The matching angle of the cylinder 10 and the ring 9 is adjusted by changing the pretightening force of the threads, so that the light of the laser displacement sensor 8 is perpendicular to the end face of the round rod 5.
According to the measuring method of the displacement type ultrahigh pressure sensor, a high-pressure medium enters a high-pressure cavity through a pressure hole of a high-pressure cylinder 1, working pressure is indirectly applied to an elastic body 11 through a pressure transmission rod 2 to enable the elastic body to generate axial displacement, the axial displacement of a round rod 5 is measured through a laser displacement sensor, and a measured pressure value is reversely pushed out through a linear relation between calibrated displacement and pressure.
Claims (10)
1. A displacement type ultrahigh pressure sensor is used for measuring high pressure of more than 1000MPa and comprises a high pressure cylinder (1), a pressure transmission rod (2), a connecting cylinder (3), a low pressure cylinder (4), a round rod (5), a screw cap (6), a laser displacement sensor (8), a ring (9), a cylinder (10) and an elastic body (11);
one end of the high-pressure barrel (1) is connected with a pressure source, the other end of the high-pressure barrel is connected with one end of the connecting barrel (3), the center of the high-pressure barrel (1) is a second-order through hole, one side close to the pressure source is a pressure hole, and one side close to the connecting barrel (3) is a mounting hole;
one end of the pressure transmission rod (2) extends into the mounting hole of the high-pressure cylinder (1) to form a sealed high-pressure cavity with the high-pressure cylinder (1), the other end of the pressure transmission rod penetrates through the connecting cylinder (3) to extend into the low-pressure cylinder (4), and the end face of the pressure transmission rod (2) extending into the high-pressure cylinder (1) is provided with a cross groove for the circulation of a high-pressure medium;
one end of the low-pressure barrel (4) is fixedly connected with the other end of the connecting barrel (3), the low-pressure barrel (4) is not in contact with the high-pressure barrel (1), so that a cavity is formed in the connecting barrel (3), and the other end of the low-pressure barrel (4) is fixedly connected with one end of the cylinder (10);
the elastic body (11) is arranged in the low-pressure cylinder (4), one end of the elastic body is contacted with the pressure transmission rod (2), and the other end of the elastic body is provided with a deep blind hole from the center of the end surface;
a nut (6) having a center hole formed along the direction of the central axis thereof;
one end of the round rod (5) extends into the deep blind hole of the elastic body (11), the end surface of the round rod is connected with the surface of the blind hole in an adhesive mode, the other end of the round rod extends out of the central hole of the nut (6), and axial displacement of the deep blind hole end of the elastic body (11) is transmitted; the elastic body (11) and the low-pressure cylinder (4) are fixedly connected into a whole by the screw cap (6);
the circular ring (9) is movably connected with the other end of the cylinder (10);
the laser displacement sensor (8) is fixed on the outer wall surface of the circular ring (9), and light rays of the laser displacement sensor (8) can irradiate the end surface of the circular rod (5) through the center of the circular ring (9).
2. The displacement type uhp sensor according to claim 1, wherein: a through hole is formed in the radial direction of the outer wall of the cavity of the connecting cylinder (3), when a high-pressure medium leaks, the high-pressure medium flows out of the through hole, pressure is relieved in time, and work safety is guaranteed.
3. The displacement type uhp sensor according to claim 1, wherein: a high-pressure sealing element (12) is arranged on the pressure transmission rod (2) extending into the high-pressure cylinder (1), so that a sealed high-pressure cavity is formed between the pressure transmission rod (2) and the high-pressure cylinder (1).
4. The displacement type uhp sensor according to claim 3, wherein: the high-pressure sealing element (12) is formed by combining a triangular soft steel ring and an O-shaped rubber ring, and the sealing performance between the pressure transmission rod (2) and the high-pressure cylinder (1) is ensured.
5. The displacement type uhp sensor according to claim 1, wherein: the pressure transmission rod (2) separates the pressure source from the elastic body (11), reduces the influence of temperature on the measurement result, and transmits the working pressure to the elastic body (11).
6. The displacement type uhp sensor according to claim 1, wherein: the inner cavity of the low-pressure cylinder (4) is a second-order through hole, the diameter of the first-order through hole on the same side with the cylinder (10) is large, and the step surface of the second-order through hole is in conical surface transition.
7. The displacement type uhp sensor according to claim 6, wherein: the end face of one end of the elastic body (11) is provided with a positioning boss, the positioning boss is positioned in the first-step through hole of the low-pressure cylinder (4), and the root of the boss is matched with the conical surface to ensure centering.
8. The displacement type uhp sensor according to claim 1, wherein: one end of the circular ring (9) is embedded into the cylinder (10), and the circular ring and the cylinder are movably matched to adjust the included angle of the central shaft.
9. The displacement type uhp sensor according to claim 1, wherein: the high-pressure cylinder (1) is made of ultra-high-strength steel, and the pressure transmission rod (2) is made of high-rigidity tungsten carbide.
10. A measurement method based on the displacement type ultra-high pressure sensor according to any one of claims 1 to 9, characterized in that: high-pressure medium enters the high-pressure cavity through a pressure hole of the high-pressure cylinder (1), working pressure is indirectly applied to the elastic body (11) through the pressure transmission rod (2) to enable the elastic body to generate axial displacement, the axial displacement of the round rod (5) is measured through the laser displacement sensor (8), and the measured pressure value is reversely pushed out through the linear relation between the calibrated displacement and the pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011530654.7A CN112729658B (en) | 2020-12-22 | 2020-12-22 | Displacement type ultrahigh pressure sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011530654.7A CN112729658B (en) | 2020-12-22 | 2020-12-22 | Displacement type ultrahigh pressure sensor |
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| Publication Number | Publication Date |
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| CN112729658A true CN112729658A (en) | 2021-04-30 |
| CN112729658B CN112729658B (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011530654.7A Active CN112729658B (en) | 2020-12-22 | 2020-12-22 | Displacement type ultrahigh pressure sensor |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2731426Y (en) * | 2004-09-29 | 2005-10-05 | 濮阳市沃隆密封机械制造有限公司 | Safety pressure device |
| CN103438807A (en) * | 2013-08-19 | 2013-12-11 | 南京理工大学 | High-pressure pilot-operated type pneumatic electromagnetic-valve valve element displacement measurement device and method |
| CN105953968A (en) * | 2016-05-27 | 2016-09-21 | 俞滨 | Novel superhigh pressure sensor and pressure detection method |
| CN107869647A (en) * | 2016-09-28 | 2018-04-03 | 德罗普萨股份公司 | Over-pressed indicator and its external member and the method for setting its intervention pressure |
-
2020
- 2020-12-22 CN CN202011530654.7A patent/CN112729658B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2731426Y (en) * | 2004-09-29 | 2005-10-05 | 濮阳市沃隆密封机械制造有限公司 | Safety pressure device |
| CN103438807A (en) * | 2013-08-19 | 2013-12-11 | 南京理工大学 | High-pressure pilot-operated type pneumatic electromagnetic-valve valve element displacement measurement device and method |
| CN105953968A (en) * | 2016-05-27 | 2016-09-21 | 俞滨 | Novel superhigh pressure sensor and pressure detection method |
| CN107869647A (en) * | 2016-09-28 | 2018-04-03 | 德罗普萨股份公司 | Over-pressed indicator and its external member and the method for setting its intervention pressure |
Non-Patent Citations (1)
| Title |
|---|
| 郭鑫等: "自增强承压圆筒结构的超高压力传感器", 《光学精密工程》 * |
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| CN112729658B (en) | 2023-01-24 |
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