CN114184315B - Sealing device for pressure scanning valve - Google Patents
Sealing device for pressure scanning valve Download PDFInfo
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- CN114184315B CN114184315B CN202111487056.0A CN202111487056A CN114184315B CN 114184315 B CN114184315 B CN 114184315B CN 202111487056 A CN202111487056 A CN 202111487056A CN 114184315 B CN114184315 B CN 114184315B
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- sealing
- thrust mechanism
- connecting rod
- pressure scanning
- scanning valve
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- 238000007789 sealing Methods 0.000 title claims abstract description 111
- 230000007246 mechanism Effects 0.000 claims abstract description 33
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims description 37
- 239000002184 metal Substances 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 4
- 238000002474 experimental method Methods 0.000 description 14
- 230000006872 improvement Effects 0.000 description 9
- 239000003921 oil Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a sealing device for a pressure scanning valve, which comprises a sealing box body, a thrust mechanism, a movable cover and a connecting rod, wherein the sealing box body is fixed at one end of the connecting rod, and the thrust mechanism is fixed at the other end of the connecting rod; the movable cover is fixedly connected with a push rod of the thrust mechanism; the push rod moves with the movable cover to realize the tight connection or separation of the sealed box body and the movable cover. The invention has the advantages of simple and compact structure, simple and convenient operation, low cost and the like.
Description
Technical Field
The invention mainly relates to the technical field of pressure scanning valves, in particular to a sealing device for a pressure scanning valve.
Background
Pressure scanning valves are very popular in the aerospace field. The pressure scanning valve is a multi-channel pressure scanning valve formed by integrating an intelligent pressure sensor component with a small embedded data acquisition system. The pressure measuring device belongs to high-performance pressure measuring equipment, is used for measuring the pressure of the dry non-corrosive gas in multiple channels, and is applied to wind tunnel tests, various aircrafts, engine tests and the like. The atmospheric pressure value measured by the pressure scanning valve can show temperature drift characteristics along with temperature change, and in order to compensate the temperature drift characteristics and improve the measurement accuracy of the pressure scanning valve, a large number of pressure scanning calibration experiments are required.
The sealing device is used as key equipment for pressure scanning calibration experiments, and the consistency of the gas sealing performance, the temperature and the internal temperature of the constant temperature and humidity test box can directly influence the calibration effect and the measurement precision of the pressure scanning valve. Meanwhile, the sealing device is placed inside the constant temperature and humidity test box, an operator needs to realize pressurization and ventilation (particularly, temperature exchange with gas inside the constant temperature and humidity test box) of the sealing device through simple and convenient operation outside the constant temperature and humidity test box, and convenience of sealing and gas exchange of the sealing device is also particularly important.
That is, in the current pressure calibration experiment of the pressure scanning valve, the sealing device needs to be pressurized with air from outside, which makes it difficult to ensure the air tightness of the sealing device in the high-temperature and high-pressure environment. At low temperature-40 deg.c and high temperature over +50 deg.c, high pressure (maximum pressure may reach 3.0 MPa) may result in insufficient air tightness of the sealing device, resulting in pressure inside the sealing device. Meanwhile, because no gas exchange exists between the sealing device and the constant temperature and humidity test box, when the temperature of the constant temperature and humidity test box reaches the preset experimental value, the temperature value detected by the temperature sensor in the sealing device is still far from the preset value of the constant temperature and humidity test box, and the precision index of the experiment is greatly influenced.
From the above, the technical problems in the current field are as follows: (1) poor sealing performance of the sealing device; (2) The synchronization of the sealing device and the internal temperature of the constant temperature and humidity test box cannot be realized.
The existing pressure scanning valve sealing device adopts a cuboid box body structure. The structure of the box body consists of the box body and a sealing end cover (a cable, a serial port line and a PU hose interface are arranged on the end cover). In the experiment, the pressure scanning valve to be detected is placed in the box body, the end cover (without a sealing ring) is covered, and the pre-tightening method is to fasten by adopting four M4 bolts and compress four threaded rods for the second time. The sealing device is placed in a constant temperature and humidity test box, and the cable, the serial port line and the PU hose can be led out through a sealing hole of the constant temperature and humidity test box and are connected with external experimental equipment. The data acquisition and calibration experiments of all channels of the pressure scanning valve under different temperature points and different pressures are realized by pressing external equipment and setting the temperature of a constant temperature and constant humidity test box.
This conventional approach suffers from the following disadvantages:
1. in the existing pressure scanning valve sealing device, a box body and a sealing end cover are directly fastened by bolts, and then are secondarily compressed by four threaded rods. When high-low temperature and high-pressure experiments are carried out, the sealing effect of the sealing device is poor, and air leakage easily occurs at the sealing surface; and the PU hose can not meet the experiment requirement in low temperature resistance, the root of the PU hose is broken, and the pressure of gas pumped into the sealing device by the pressurizing device can not reach a preset value.
2. During the experiment, the temperature in the sealing device can not reach the temperature value that constant temperature and humidity test box set up, and the two temperature values are far away, can directly influence the data that calibration experiment gathered.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems existing in the prior art, the invention provides the sealing device for the pressure scanning valve, which has the advantages of simple and compact structure, simplicity and convenience in operation and low cost.
In order to solve the technical problems, the invention adopts the following technical scheme:
the sealing device for the pressure scanning valve comprises a sealing box body, a thrust mechanism, a movable cover and a connecting rod, wherein the sealing box body is fixed at one end of the connecting rod, and the thrust mechanism is fixed at the other end of the connecting rod; the movable cover is fixedly connected with a push rod of the thrust mechanism; the push rod moves with the movable cover to realize the tight connection or separation of the sealed box body and the movable cover.
As a further improvement of the invention: the sealing box body is fixed at one end of the connecting rod through a nut, and the thrust mechanism is fixed at the other end of the connecting rod through a locking nut.
As a further improvement of the invention: the two ends of the connecting rod are in a threaded rod structure form and are used for locking nuts to fix the sealing box body and the thrust mechanism.
As a further improvement of the invention: the movable cover is fixed with the push rod of the thrust mechanism through welding.
As a further improvement of the invention: the two ends of the connecting rod are also provided with ladder-shaped structures for limiting the movement positions of the sealing box body and the thrust mechanism.
As a further improvement of the invention: and a sealing ring is arranged in the groove of the sealing box body.
As a further improvement of the invention: the sealing box body comprises a stepped hole for installing an aviation plug and leading out the wire number of the pressure scanning valve positioned in the sealing box body.
As a further improvement of the invention: the sealing box body comprises a threaded hole and is used for being connected with a metal corrugated hose, and the sealing box body can be pressurized outside the constant temperature and humidity test box through the pressurizing device.
As a further improvement of the invention: one end of the metal corrugated pipe is connected with the movable cover, and the other end of the metal corrugated pipe is sealed by the plug.
As a further improvement of the invention: the thrust mechanism is connected with the oil pipe and the manual pump through nuts, and the oil pipe penetrates through a sealing hole of the constant temperature and humidity test box.
Compared with the prior art, the invention has the advantages that:
1. the sealing device for the pressure scanning valve has the advantages of simple and compact structure, simplicity and convenience in operation and capability of rapidly realizing the sealing of the sealing device. Moreover, the high-temperature high-pressure sealing device with the movable cover can also realize the exchange of the sealing device and the gas temperature in the constant-temperature constant-humidity test box outside the constant-temperature constant-humidity test box.
2. The sealing device for the pressure scanning valve aims at the defects of insufficient sealing performance of the sealing device and unbalanced temperature value of gas temperature in the sealing device and set temperature value in a constant temperature and humidity test box in the prior art, and the sealing effect can be ensured by controlling the thrust mechanism to realize the compression of the sealing box body, the O-shaped sealing ring and the sealing cover, so that stable pressure is provided for the pressure scanning valve. The invention has the advantages of compact structure, simple operation, capability of realizing the quick sealing of the sealing box body and the movable cover through the thrust mechanism, and the like, and can realize the temperature and humidity balance of the sealing device gas and the gas in the constant temperature and humidity test box only by operating outside the constant temperature and humidity test box.
Drawings
Fig. 1 is a schematic diagram of the structural principle of the present invention in a specific application example.
Fig. 2 is a schematic diagram of the principle of the front view structure of the present invention in a specific application example.
FIG. 3 is a schematic view of the axial structure of the seal box in a specific application example of the invention.
FIG. 4 is an axial schematic view of a seal case in a specific application example of the present invention.
Fig. 5 is a schematic cross-sectional view of the structure at A-A in fig. 4.
FIG. 6 is a schematic view of the structure of an O-ring seal in a specific application example of the invention.
Fig. 7 is a schematic view of the structure of the movable cover in a specific application example of the present invention.
Fig. 8 is a schematic view of the structure of the connecting rod in a specific application example of the present invention.
Fig. 9 is a schematic axial structure of a thrust mechanism in a specific application example of the present invention.
Fig. 10 is a schematic diagram showing the front structure of the thrust mechanism in a specific application example of the present invention.
Fig. 11 is a schematic view of the structural principle of the present invention in a use environment in a specific application example.
Fig. 12 is a schematic view of the sealing state structure in a specific application example of the present invention.
Fig. 13 is a schematic diagram of the principle of the separation state structure in a specific application example of the present invention.
Legend description:
1. sealing the box body; 2. a thrust mechanism; 3. a lock nut; 4. a push rod; 5. a seal ring; 6. a movable cover; 7. a connecting rod; 8. an oil pipe; 9. a manual pump; 10. a metal corrugated hose; 11. aviation plug; 12. a threaded hole; 13. a stepped hole; 14. constant temperature and humidity test box; 15. sealing the hole.
Detailed Description
The invention will be described in further detail with reference to the drawings and the specific examples.
The invention is mainly suitable for the pressure scanning valve calibration experiment, which is as follows: the pressure scanning valve is internally provided with a plurality of silicon piezoresistive pressure sensors, and the pressure sensors can drift along with the change of temperature. Therefore, in the development stage, the temperature characteristics of the pressure sensor need to be studied, and the pressure measured values of the pressure sensor at different temperature points need to be calibrated.
As shown in fig. 1 to 13, the sealing device for a pressure scanning valve of the present invention is a high-temperature high-pressure sealing device with a movable cover; it comprises the following steps: the sealing box body 1, the thrust mechanism 2, the lock nut 3, the movable cover 6 and the connecting rod 7, wherein the sealing box body 1 is fixed at one end of the connecting rod 7, and the thrust mechanism 2 is fixed at the other end of the connecting rod 7; the movable cover 6 is fixedly connected with the push rod 4 of the thrust mechanism 2 (for example, can be fixed by welding); the push rod 4 moves with the movable cover 6 to realize tight connection or separation of the sealed box body 1 and the movable cover 6 and realize temperature balance between the sealing device and the inside of the constant temperature and humidity test box 14.
For example, in the present embodiment, the sealing case 1 is fixed at the left end of the connecting rod 7, the thrust mechanism 2 is connected to the right end of the connecting rod 7, and then the push rod 4 moves leftwards with the movable cover 6, so that the sealing case 1 and the movable cover 6 are tightly connected, and the push rod 4 moves rightwards to separate the sealing case 1 and the movable cover 6. The connecting rod 7 is used for ensuring the structural strength of the whole sealing device.
In a specific application example, the movable cover 6 is fixed to the push rod 4 of the thrust mechanism 2 by welding, and it can be understood that other fixing connection modes can be adopted according to actual needs, so as to ensure that rigid connection and linkage can be realized.
In a specific application example, the sealing box 1 is fixed at one end of the connecting rod 7 through a nut, and the thrust mechanism 2 is fixed at the other end of the connecting rod 7 through a locking nut 3.
In a specific application example, two ends of the connecting rod 7 are in a threaded rod structure form, and the threaded rod structure form is used for fixing the sealing box body 1 and the thrust mechanism 2 by the locking nut 3. The two ends of the connecting rod 7 are also provided with ladder-shaped structures for limiting the movement positions of the sealing box body 1 and the thrust mechanism 2.
In a specific application example, a sealing ring 5, such as an O-ring or other types of sealing rings, may be disposed in the groove of the sealing box 1.
Referring to fig. 3 to 5, in a specific application example, the sealing case 1 includes a stepped hole 13 for installing an aviation plug 11 to draw out an electric wire of a pressure scanning valve located inside the sealing case 1.
In order to synchronize the internal temperature of the sealing device with the set temperature of the constant temperature and humidity test chamber 14, in a specific application example, the sealing box body 1 includes a threaded hole 12 for connecting with the metal corrugated hose 10, and the sealing box body 1 can be pressurized outside the constant temperature and humidity test chamber 14 through the pressurizing device. One end of the metal corrugated hose 10 is connected with the movable cover 6, and the other end is sealed by a plug. During the experiment, when measuring corresponding temperature point, can be with the end cap of metal ripple unscrewing (pull out the metal ripple through the sealed opening 15 of constant temperature and humidity test chamber 14), place in constant temperature and humidity test chamber 14, wait for 2 hours, accomplish gas temperature synchronization, pull out the bellows again, screw in the end cap, the rethread is suppressed the device, is beaten into pressure, measurement experiment data. The data for each different temperature point is repeatedly measured in sequence.
Referring to fig. 9-13, in a specific application example, the thrust mechanism 2 is connected with the oil pipe 8 and the manual pump 9 through a nut, the oil pipe 8 passes through a sealing hole 15 of the constant temperature and humidity test box 14, the sealing device of the invention is positioned inside the constant temperature and humidity test box 14, the manual pump 9 is positioned outside the constant temperature and humidity test box 14, and an operator can realize left and right movement of the push rod 4 only by pressurizing the manual pump 9 outside the constant temperature and humidity test box 14.
The above-mentioned constant temperature and humidity test chamber 14, also called constant temperature and humidity test equipment, incubator, etc. The temperature and humidity in the working chamber of the test box are controlled in a constant range in a certain time by utilizing the refrigerating equipment, the heating equipment, the humidifying equipment and the dehumidifying equipment, so that a specific temperature and temperature environment is manufactured artificially, and the environment resistance detection is carried out on the specific equipment, thereby achieving the purposes of finding problems and improving the design and manufacturing process.
By adopting the structure, the sealing device of the pressure scanning valve has good sealing performance in the low-high temperature (the low temperature can reach-40 ℃, the high temperature can reach +60 ℃) and the high pressure (the maximum pressure can reach 3.0 Mpa) states. In the experiment, the invention can realize the synchronization of the internal temperature of the sealing device and the internal temperature of the constant temperature and humidity test box 14.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the invention without departing from the principles thereof are intended to be within the scope of the invention as set forth in the following claims.
Claims (8)
1. The sealing device for the pressure scanning valve is characterized by comprising a sealing box body (1), a thrust mechanism (2), a movable cover (6) and a connecting rod (7), wherein the sealing box body (1) is fixed at one end of the connecting rod (7), and the thrust mechanism (2) is fixed at the other end of the connecting rod (7); the movable cover (6) is fixedly connected with the push rod (4) of the thrust mechanism (2); the push rod (4) moves with the movable cover (6) to realize tight connection or separation of the sealed box body (1) and the movable cover (6); the sealing box body (1) comprises a threaded hole (12) for connecting a metal corrugated hose (10), and the sealing box body (1) is pressurized outside the constant temperature and humidity test box (14) through a pressurizing device; one end of the metal corrugated hose (10) is connected with the movable cover (6), and the other end of the metal corrugated hose is sealed by a plug.
2. Sealing arrangement for a pressure scanning valve according to claim 1, characterized in that the sealing box (1) is fixed to one end of the connecting rod (7) by means of a nut, and the thrust mechanism (2) is fixed to the other end of the connecting rod (7) by means of a lock nut (3).
3. Sealing arrangement for a pressure scanning valve according to claim 2, characterized in that the two ends of the connecting rod (7) are in the form of threaded rods for the locking nut (3) to fix the sealing box (1) and the thrust mechanism (2).
4. A sealing device for a pressure scanning valve according to claim 1 or 2 or 3, characterized in that the movable cover (6) is fixed to the push rod (4) of the thrust mechanism (2) by welding.
5. A sealing arrangement for a pressure scanning valve according to claim 1 or 2 or 3, characterized in that the connecting rod (7) is further provided with a stepped structure on both ends for limiting the movement position of the sealing box (1) and the thrust mechanism (2).
6. A sealing arrangement for a pressure scanning valve according to claim 1 or 2 or 3, characterized in that a sealing ring (5) is arranged in the groove of the sealing box (1).
7. A sealing arrangement for a pressure scanning valve according to claim 1 or 2 or 3, characterized in that the sealing box (1) comprises a stepped bore (13) for mounting an aviation plug (11) for leading out the electrical wires of the pressure scanning valve located inside the sealing box (1).
8. A sealing arrangement for a pressure scanning valve according to claim 1 or 2 or 3, characterized in that the thrust mechanism (2) is connected to an oil pipe (8), a manual pump (9) by means of a nut, the oil pipe (8) passing through a sealing hole (15) of a constant temperature and humidity test chamber (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111487056.0A CN114184315B (en) | 2021-12-07 | 2021-12-07 | Sealing device for pressure scanning valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111487056.0A CN114184315B (en) | 2021-12-07 | 2021-12-07 | Sealing device for pressure scanning valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114184315A CN114184315A (en) | 2022-03-15 |
| CN114184315B true CN114184315B (en) | 2023-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111487056.0A Active CN114184315B (en) | 2021-12-07 | 2021-12-07 | Sealing device for pressure scanning valve |
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| Country | Link |
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| CN (1) | CN114184315B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568310A (en) * | 2015-01-19 | 2015-04-29 | 北京大学 | Testing device for high-temperature pressure sensor |
| CN207036347U (en) * | 2017-08-01 | 2018-02-23 | 苏州感芯微系统技术有限公司 | Pressure sensor module incubator calibration equipment |
| CN110346285A (en) * | 2019-07-22 | 2019-10-18 | 中国石油大学(华东) | Mechanical characteristic detection device and force detection system |
| CN210603721U (en) * | 2019-11-20 | 2020-05-22 | 武汉神动汽车电子电器股份有限公司 | Multi-path full-automatic testing device for detecting pressure sensor |
| CN111998996A (en) * | 2020-09-27 | 2020-11-27 | 中国航空工业集团公司北京长城计量测试技术研究所 | Bellows type gas pulsation pressure generator |
-
2021
- 2021-12-07 CN CN202111487056.0A patent/CN114184315B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568310A (en) * | 2015-01-19 | 2015-04-29 | 北京大学 | Testing device for high-temperature pressure sensor |
| CN207036347U (en) * | 2017-08-01 | 2018-02-23 | 苏州感芯微系统技术有限公司 | Pressure sensor module incubator calibration equipment |
| CN110346285A (en) * | 2019-07-22 | 2019-10-18 | 中国石油大学(华东) | Mechanical characteristic detection device and force detection system |
| CN210603721U (en) * | 2019-11-20 | 2020-05-22 | 武汉神动汽车电子电器股份有限公司 | Multi-path full-automatic testing device for detecting pressure sensor |
| CN111998996A (en) * | 2020-09-27 | 2020-11-27 | 中国航空工业集团公司北京长城计量测试技术研究所 | Bellows type gas pulsation pressure generator |
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| Publication number | Publication date |
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| CN114184315A (en) | 2022-03-15 |
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