CN109737905B - Safety valve core displacement monitoring system of large pressure container - Google Patents
Safety valve core displacement monitoring system of large pressure container Download PDFInfo
- Publication number
- CN109737905B CN109737905B CN201811589621.2A CN201811589621A CN109737905B CN 109737905 B CN109737905 B CN 109737905B CN 201811589621 A CN201811589621 A CN 201811589621A CN 109737905 B CN109737905 B CN 109737905B
- Authority
- CN
- China
- Prior art keywords
- valve
- inclination angle
- rod
- computer
- telescopic rod
- 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
Images
Landscapes
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The embodiment of the invention provides a safety valve core displacement monitoring system of a large-scale pressure vessel, which comprises: a valve core; a valve stem connected to the valve core; one end of the telescopic rod is connected with the valve rod, and the other end of the telescopic rod is connected with the valve wall; the micro-electro-mechanical system inclination angle sensor is arranged on the telescopic rod; the computer is arranged on the valve wall and is connected with the inclination angle sensor of the micro electro mechanical system; when the valve rod rises or falls, the inclination angle between the telescopic rod and the horizontal plane is detected by the inclination angle sensor of the micro-electro-mechanical system, and the vertical displacement of the valve rod is calculated by the computer according to the inclination angle information, so that the displacement information of the valve core is obtained. The system has higher engineering practicality and practical value due to the adoption of the low-cost MEMS device.
Description
Technical Field
The embodiment of the invention relates to the technical field of safety valves, in particular to a safety valve core displacement monitoring system of a large-scale pressure container.
Background
The safety valve is a component which is opened and closed and is in a normally closed state under the action of external force. When the pressure of the medium in the equipment or the pipeline rises to exceed a specified value, the aim of pressure relief is achieved by discharging the medium to the outside of the system, so that accidents of the system caused by overhigh pressure are avoided. The safety valve is mainly used for boilers, pressure vessels and pipelines, controls the internal pressure not to exceed a specified value, and plays an important role in protecting personal safety and equipment operation.
The safety valve (also called breather valve) of a large pressure vessel is of great importance, and if the safety valve cannot be opened or closed normally, the pressure vessel can explode or leak. The safety valve is in a closed state at ordinary times, and whether the valve core of the safety valve acts or not and the action amplitude are not easy to judge from the outside. If a displacement sensor is adopted to measure the relative displacement of the valve core, the opening and closing action and the displacement of the valve core can be calculated. However, the conventional displacement sensor has certain limitations in use in such application environments, for example, the pull wire displacement sensor is easily polluted by oil stains, the ultrasonic distance measurement mode is easily interfered by air flow when the pressure vessel is depressurized, the eddy current sensor needs to be specifically calculated according to mechanical parts in the valve body and has a higher unit price, and the magnetic displacement sensor can adapt to the oil stain environment but has a certain distance measurement blind area and has a higher unit price. Therefore, there is a need in engineering for an on-line monitoring system that can calculate the approximate displacement, and that is easy to install, low cost, oil-resistant, and corrosion-resistant.
The prior art (application No. CN201410391984.0) discloses a safety valve precision displacement sensor, which includes a switch induction rod, a position detection circuit and a shaping circuit, wherein the switch induction rod is installed at the rear side of a valve core and is electrically connected with the position detection circuit, the position detection circuit is electrically connected with the shaping circuit, and the shaping circuit is a two-way signal output. Because the technical scheme generates displacement signals through the magnetic field induction principle to detect the position of the valve core, the anti-interference capability in a strong electromagnetic radiation area is poor, and accurate measurement cannot be carried out.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a valve core displacement monitoring system for a safety valve of a large-sized pressure container.
The embodiment of the invention provides a safety valve core displacement monitoring system of a large-scale pressure vessel, which is characterized by comprising the following components:
a valve core;
a valve stem connected to the valve core;
one end of the telescopic rod is connected with the valve rod, and the other end of the telescopic rod is connected with the valve wall;
the micro-electro-mechanical system inclination angle sensor is arranged on the telescopic rod;
the computer is arranged on the valve wall and is connected with the micro-electro-mechanical system inclination angle sensor;
when the valve rod rises or falls, the inclination angle sensor of the micro electro mechanical system detects the inclination angle between the telescopic rod and the horizontal plane, and the computer calculates the vertical displacement of the valve rod according to the inclination angle information, so that the displacement information of the valve core is obtained.
Further, the computer sends the displacement information of the valve core to the outside of the valve body in a wired mode.
Further, the vertical displacement of the valve stem is related to the inclination angle as follows:
vertical displacement is the horizontal distance of the valve stem from the valve wall x tan (inclination angle).
Further, the wired manner is to form a through hole on the valve wall, communicate the computer with the outside through the through hole using a wire, the computer transmits information to the outside through the wire, and the outside supplies power to the computer through the wire.
Further, the wire is a multi-strand composite wire.
Furthermore, the telescopic rods are symmetrically arranged on the left and right of the valve rod, and the micro electro mechanical system inclination angle sensors are arranged on each telescopic rod to form the symmetrical arrangement of the micro electro mechanical system inclination angle sensors on the valve rod.
Further, the telescopic rod is connected with the valve rod and the valve wall in a hinged mode.
Further, the length and the installation position of the telescopic rod can be adjusted according to the diameter of the valve body, the stroke of the valve core and the installation condition.
Furthermore, the measurement precision of the micro-electro-mechanical system inclination angle sensor can reach 0.1 degree, and the measurement precision of the vertical displacement of the valve rod can reach 1 millimeter.
Further, the computer may be an embedded computer with low power consumption.
According to the safety valve core displacement monitoring system for the large pressure container, provided by the embodiment of the invention, the up-and-down movement of the valve rod is converted into the change of the inclination angle of the telescopic rod by using the telescopic rod, the inclination angle is detected by using an MEMS (micro electro mechanical system) inclination angle sensor and is transmitted to a computer arranged in the valve, and the computer calculates the displacement of the valve rod in real time, so that whether the safety valve is opened or closed is judged. Because of the adoption of the low-cost MEMS device, the monitoring system has higher engineering practicality and practical value.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a structural diagram of a valve core displacement monitoring system of a safety valve of a large-sized pressure container.
1-valve core, 2-valve rod, 3-valve wall, 4-telescopic rod, 5-MEMS tilt angle sensor and 6-computer
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 shows a relief valve spool displacement monitoring system for a large pressure vessel according to an embodiment of the present invention.
As shown in fig. 1, the monitoring system includes a valve core 1, a valve rod 2, a valve wall 3, an expansion rod 4, an MEMS (micro electro mechanical system) tilt angle sensor 5, and a computer 6. The valve rod 2 is positioned at the upper part of the valve core 1 and is vertically connected with the valve core 1, namely the valve rod 2 is vertical to the horizontal plane. One end of the telescopic rod 4 is installed on the valve rod 2, the other end of the telescopic rod is installed on the valve wall 3, and the MEMS inclination angle sensor 5 is fixed on the telescopic rod 4. The computer 6 is mounted inside the valve wall 3 and is connected to the MEMS tilt sensor 5 by means of wires. The telescopic rod 4 forms an inclination angle theta with the horizontal plane.
When the valve rod 2 ascends or descends, the MEMS inclination angle sensor 5 detects an inclination angle theta, and the computer 6 calculates the vertical displacement of the valve rod 2 in real time according to the inclination angle theta, so that the displacement information of the valve core 1 is obtained.
According to the safety valve core displacement monitoring system of the large pressure container, provided by the embodiment of the invention, the telescopic rod is utilized to convert the vertical movement of the valve rod into the inclination angle change of the telescopic rod, the displacement information of the valve core is calculated in real time, and the system has higher engineering practicality and practical value due to the adoption of the low-cost MEMS device.
As shown in fig. 1, the horizontal distance between the valve rod 2 and the valve wall 3 is a fixed value, the telescopic rod 4 forms an inclination angle θ with the horizontal plane, and the vertical displacement of the valve rod 2 has a fixed triangular relationship with the inclination angle θ, that is: vertical displacement is the horizontal distance of the valve stem from the valve wall x tan θ.
When the valve rod 2 ascends, the telescopic rod 4 stretches, the inclination angle theta is increased, the MEMS inclination angle sensor 5 detects the inclination angle theta, and the computer 6 calculates the ascending distance of the valve rod 2 according to the relational expression so as to obtain the ascending displacement information of the valve core 1.
When the valve rod 2 descends, the telescopic rod 4 is shortened, the inclination angle theta is reduced, the MEMS inclination angle sensor 5 detects the inclination angle theta, and the computer 6 calculates the descending distance of the valve rod 2 according to the relational expression, so that the descending displacement information of the valve core 1 is obtained.
In the embodiment of the invention, the displacement information of the valve core 1 and the opening and closing action information of the safety valve obtained according to the displacement information can be sent to the outside of the valve body in a wired mode. The wired mode is as follows: the valve wall 3 is drilled, a plurality of strands of composite wires are adopted to communicate the computer 6 with the outside, and the computer 6 sends displacement information of the valve core 1 and opening and closing action information of the safety valve to the outside through the wires. Meanwhile, the computer 6 is externally supplied with power through the multi-strand composite wire, so that the problems of information transmission and power supply are solved.
As shown in fig. 1, the telescopic rod 4 may be hinged to the valve stem 2 at one end and to the valve wall 3 at the other end. Moreover, the telescopic rods 4 can be symmetrically installed on the left and right sides of the valve rod 2, and the MEMS inclination angle sensors 5 are installed on each telescopic rod 4, so that the MEMS inclination angle sensors 5 are symmetrically distributed on the left and right sides of the valve rod 2, and the anti-interference capacity in the detection process is further improved.
In the embodiment of the invention, the length and the installation position of the telescopic rod 4 can be adjusted according to the diameter of the valve body, the stroke of the valve core and the installation condition. The measurement accuracy of the MEMS tilt angle sensor 5 can reach 0.1 degree, the range can be limited within the range of 0-45 degrees by adjusting the total length of the telescopic rod 4, and the measurement accuracy of the vertical displacement of the valve rod 2 can reach 1 millimeter.
In the embodiment of the present invention, the computer 6 may be an embedded computer with low power consumption.
According to the safety valve spool displacement monitoring system provided by the embodiment of the invention, the telescopic rod is used for converting the vertical movement of the valve rod into the inclination angle change of the telescopic rod, the MEMS inclination angle sensor is used for detecting the inclination angle and transmitting the inclination angle to the computer arranged in the valve, and the computer calculates the displacement of the valve rod in real time and judges whether the safety valve is opened or closed according to the displacement. Because of the adoption of the low-cost MEMS device, the monitoring system has higher engineering practicality and practical value.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a large-scale pressure vessel's relief valve case displacement monitoring system which characterized in that includes:
a valve core;
a valve stem connected to the valve core;
one end of the telescopic rod is connected with the valve rod, and the other end of the telescopic rod is connected with the valve wall;
the micro-electro-mechanical system inclination angle sensor is arranged on the telescopic rod; the telescopic rods are symmetrically arranged on the left and right of the valve rod, and the micro electro mechanical system inclination angle sensor is arranged on each telescopic rod to form that the micro electro mechanical system inclination angle sensors are symmetrically arranged on the left and right of the valve rod;
the computer is arranged on the valve wall and is connected with the micro-electro-mechanical system inclination angle sensor;
when the valve rod rises or falls, the inclination angle sensor of the micro electro mechanical system detects the inclination angle between the telescopic rod and the horizontal plane, and the computer calculates the vertical displacement of the valve rod according to the inclination angle information so as to obtain the displacement information of the valve core; the relationship between the vertical displacement of the valve stem and the inclination angle is as follows:
vertical displacement is the horizontal distance of the valve stem from the valve wall x tan (inclination angle).
2. The system of claim 1, wherein the computer sends information about the displacement of the spool to the outside of the valve body by wire.
3. The system of claim 2, wherein the wired manner is to form a through hole on the valve wall, communicate the computer with the outside through the through hole using a wire, the computer transmits information to the outside through the wire, and the outside supplies power to the computer through the wire.
4. The system of claim 3, wherein the wire is a multi-strand composite wire.
5. The system of claim 1, wherein the telescoping rod is hingedly connected to the valve stem and the valve wall.
6. The system of claim 5, wherein the length and mounting position of the telescoping rod are adjustable based on valve body diameter, valve spool travel and mounting conditions.
7. The system of claim 1, wherein the mems tilt sensor measures up to 0.1 degrees and the vertical displacement of the valve stem measures up to 1 mm.
8. The system of claim 1, wherein the computer is a low power embedded computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811589621.2A CN109737905B (en) | 2018-12-25 | 2018-12-25 | Safety valve core displacement monitoring system of large pressure container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811589621.2A CN109737905B (en) | 2018-12-25 | 2018-12-25 | Safety valve core displacement monitoring system of large pressure container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109737905A CN109737905A (en) | 2019-05-10 |
| CN109737905B true CN109737905B (en) | 2021-04-13 |
Family
ID=66361146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811589621.2A Active CN109737905B (en) | 2018-12-25 | 2018-12-25 | Safety valve core displacement monitoring system of large pressure container |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109737905B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1166139A1 (en) * | 1983-11-18 | 1985-07-07 | Bogatushin Boris Ya | Device for determining values of trigonometric functions |
| CN204329886U (en) * | 2015-01-18 | 2015-05-13 | 蒋梦 | A kind of link-type displacement monitor |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR910002234B1 (en) * | 1982-12-01 | 1991-04-08 | 히다찌 겡끼 가부시기가이샤 | Load weight indicating system for load moving machine |
| JP2009162736A (en) * | 2008-01-07 | 2009-07-23 | Michihide Kondo | Length gauge class loaded with calculation software of angle and planimeter |
| CN102392664B (en) * | 2011-07-26 | 2014-04-16 | 北京天地玛珂电液控制***有限公司 | Hydraulic support with inclination sensors and height measurement method thereof |
| CN103995542B (en) * | 2014-05-04 | 2017-02-15 | 江苏大学 | Method for adjusting level device |
| CN105370936A (en) * | 2014-08-11 | 2016-03-02 | 芜湖市金越电子科技有限公司 | A safety valve precision displacement sensor |
| CN105466371B (en) * | 2015-11-23 | 2018-06-01 | 西安航空制动科技有限公司 | The device and measuring method of survey aircraft undercarriage wheel shaft end position |
| CN105571564B (en) * | 2015-12-11 | 2018-05-29 | 北京天地玛珂电液控制***有限公司 | A kind of elevation carrection sensor and the hydraulic support using elevation carrection sensor |
| EP3436392B8 (en) * | 2016-03-31 | 2021-04-21 | NHLO Holding B.V. | Apparatus comprising a pivotable arm and a configurable spring |
| CN108413911A (en) * | 2018-02-26 | 2018-08-17 | 中国长江电力股份有限公司 | A kind of main dispensing spool displacement measurement method of contactless governor and device |
| CN108168513A (en) * | 2018-02-27 | 2018-06-15 | 北京天地玛珂电液控制***有限公司 | A kind of hydraulic support height measuring device and method |
| CN207832155U (en) * | 2018-03-08 | 2018-09-07 | 郑小飞 | A kind of portable platform clearance survey equipment |
-
2018
- 2018-12-25 CN CN201811589621.2A patent/CN109737905B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1166139A1 (en) * | 1983-11-18 | 1985-07-07 | Bogatushin Boris Ya | Device for determining values of trigonometric functions |
| CN204329886U (en) * | 2015-01-18 | 2015-05-13 | 蒋梦 | A kind of link-type displacement monitor |
Non-Patent Citations (1)
| Title |
|---|
| 基于多电动机的智能升降工作台控制***设计与实现;王天雷; 张京玲; 王柱; 贺跃帮; 陈振杰;《电气应用》;20161231;第35卷(第23期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109737905A (en) | 2019-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102384303B (en) | Cutoff valve control system | |
| CN104685323B (en) | Fill level monitoring system and flow measuring device | |
| KR20140111306A (en) | Method for determining a position of a piston in a piston pressure accumulator by means of inductive sensors and suitably designed piston pressure accumulator | |
| CN109737905B (en) | Safety valve core displacement monitoring system of large pressure container | |
| CN109425413B (en) | Marine adjustable liquid level alarm sensor with double alarm points | |
| CN101929484A (en) | Built-in piston cylinder for stroke detecting device | |
| CN105429302B (en) | Transmission line of electricity real-time windage yaw on-line detecting system | |
| CN2685848Y (en) | Water level detector | |
| CN210089805U (en) | Transducer and buoy liquid level meter | |
| FI87104B (en) | HYDRAULJACK MED ETT SYSTEM FOER KONTROLLERING AV KOLVENS LAEGE. | |
| CN206074086U (en) | Fluid level measuring device | |
| CN111721398B (en) | Beam-pumping unit support top amplitude detection device | |
| US11092474B2 (en) | Liquid level sensor | |
| CN209979027U (en) | Liquid level sensor | |
| CN208704834U (en) | A kind of anti-mud blocking laser liquid-level sensor measuring tube and laser liquid-level sensor | |
| CN102183275A (en) | Low-power consumption float flow sensor | |
| CN201716081U (en) | Coil surrounding type warning flow meter | |
| CN101929485A (en) | Built-in plunger-type cylinder of travel test device | |
| CN105136219A (en) | Low power consumption floater flow sensor | |
| CN204924307U (en) | Lever flow sensor | |
| CN219532141U (en) | Metal tube float flowmeter | |
| CN212988456U (en) | Transformer oil tank state parameter acquisition device | |
| CN216050089U (en) | High-sensitivity thermal flow switch | |
| CN213658026U (en) | Liquid level measuring device | |
| RU176580U1 (en) | Safety loop control unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |