CN118408151A - 0-210MPa electrodeless adjustable electric pressure relief valve control system - Google Patents
0-210MPa electrodeless adjustable electric pressure relief valve control system Download PDFInfo
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- CN118408151A CN118408151A CN202410889890.XA CN202410889890A CN118408151A CN 118408151 A CN118408151 A CN 118408151A CN 202410889890 A CN202410889890 A CN 202410889890A CN 118408151 A CN118408151 A CN 118408151A
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 66
- 238000001514 detection method Methods 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 230000033228 biological regulation Effects 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 239000012528 membrane Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
The application relates to a 0-210MPa stepless adjustable electric pressure release valve control system, which comprises a pressure regulating pipeline, a plurality of pressure difference sensors arranged in the pressure regulating pipeline at intervals, a pressure regulator arranged at the proximal end of the pressure regulating pipeline, a pressure compensator arranged at the distal end of the pressure regulating pipeline, and a controller electrically connected with the pressure difference sensors, the pressure regulator and the pressure compensator, wherein the pressure regulator carries out primary regulation on the internal pressure of the pressure regulating pipeline according to the feedback of the pressure difference sensors, and the pressure compensator carries out secondary regulation on the internal pressure of the pressure regulating pipeline; a regulating end of a pressure compensator exists in front of each differential pressure sensor. According to the 0-210MPa stepless adjustable electric pressure relief valve control system disclosed by the application, dynamic pressure adjustment of the main pipeline is realized by providing an active dynamic pressure adjustment mode, so that the pressure of the main pipeline and the pressure of each terminal connected with the main pipeline can be kept stable.
Description
Technical Field
The application relates to the technical field of control, in particular to a 0-210MPa stepless adjustable electric pressure relief valve control system.
Background
When the pressure in the equipment or the pipeline exceeds the set pressure of the pressure relief valve, the pressure relief valve is automatically opened, so that the medium pressure in the equipment and the pipeline is ensured to be under the set pressure, the equipment and the pipeline are protected from accidents, and the pressure relief valve in the form aims at safe production.
The other type of pressure release valve is also called an adjustable differential pressure control valve, a differential pressure balance valve or a differential pressure regulating valve, and is automatically regulated by means of the pressure change of the medium to be regulated, so that the flow change caused by the residual pressure head and pressure fluctuation of a pipe network is automatically eliminated, the differential pressure between an inlet and an outlet of a user is constant, and the system operation is stabilized.
The constant pressure difference is widely used in the metering field, and has wide application prospect in precise industrial production, such as dense production areas using main pipelines for feeding, and flow valves, metering valves and the like are simultaneously used at each terminal to realize stable feeding. When the production of the terminal is stopped or started, pressure fluctuation in the main pipeline is caused, so that transient unstable states occur at each terminal.
The occurrence and influence of this unstable state is more pronounced in high pressure conditions, which may cause short instabilities in the feed at the terminal and even impact on the stable feed equipment of the terminal.
Disclosure of Invention
The application provides a 0-210MPa stepless adjustable electric pressure release valve control system, which realizes dynamic pressure adjustment of a main pipeline by providing an active dynamic pressure adjustment mode, so that the pressure of the main pipeline and the pressure of each terminal connected with the main pipeline can be kept stable.
The above object of the present application is achieved by the following technical solutions:
The application provides a 0-210MPa stepless adjustable electric pressure release valve control system, which comprises:
A pressure regulating conduit;
The pressure difference sensors are arranged in the pressure regulating pipeline at intervals;
The pressure regulator is arranged at the proximal end of the pressure regulating pipeline and is used for regulating the internal pressure of the pressure regulating pipeline once according to the feedback of the pressure difference sensor;
the pressure compensator is arranged at the far end of the pressure regulating pipeline, a plurality of regulating ends of the pressure compensator are connected with the pressure regulating pipeline, and the pressure compensator is used for secondarily regulating the internal pressure of the pressure regulating pipeline;
the controller is electrically connected with the differential pressure sensor, the pressure regulator and the pressure compensator;
the pressure compensator comprises two pressure difference sensors, wherein the front of each pressure difference sensor is provided with an adjusting end of the pressure compensator, and only one adjusting end of the pressure compensator is arranged between any two adjacent pressure difference sensors.
In one possible implementation of the application, a differential pressure sensor includes:
the main body is arranged on the inner wall of the pressure regulating pipeline;
the detection body is arranged on the main body, and an open detection cavity is formed in the detection body;
the diaphragm is arranged on the detection body and seals the open detection cavity;
The telescopic F-P contact pressure sensor is arranged in the open detection cavity, and the axis of the telescopic F-P contact pressure sensor and the axis of the open detection cavity are positioned on the same straight line;
the detection end of the telescopic F-P contact pressure sensor is abutted on the diaphragm.
In one possible implementation of the application, the area on the membrane is divided into a rigid contact area and a flexible telescopic area;
The rigid contact area is positioned inside the flexible expansion area;
The detection end of the telescopic F-P contact pressure sensor is abutted on the rigid contact area.
In one possible implementation of the application, there are a plurality of guiding ridges on the flexible expansion region, one end of the guiding ridge being located at the inner edge of the flexible expansion region, and the other end of the guiding ridge being located at the outer edge of the flexible expansion region.
In one possible implementation of the application, there are multiple F-P cavities on the sensing end of the telescopic F-P contact pressure sensor, with each F-P cavity abutting against a diaphragm.
In one possible implementation of the application, the pressure compensator comprises:
the annular compensation bin is arranged on the pressure adjusting pipeline and is communicated with the space in the pressure adjusting pipeline;
the first end of the compensation pipeline is connected with the annular compensation bin;
And the compensation water pump is connected with the second end of the compensation pipeline and is also electrically connected with the controller.
In one possible implementation of the application, the first end of the compensation conduit also extends into the interior of the annular compensation chamber.
In one possible implementation manner of the present application, the method further includes:
The annular adjusting air bag is arranged in the pressure adjusting pipeline, and is positioned behind the annular compensation bin in the medium flowing direction in the pressure adjusting pipeline;
the air pressure regulator is connected with the annular regulating air bag;
the air pressure regulator is electrically connected with the controller.
In one possible implementation manner of the application, the number of the annular adjusting air bags is multiple, and one annular adjusting air bag is arranged behind each annular compensating bin in the medium flow direction in the pressure adjusting pipeline;
only one annular regulating air bag exists between any two adjacent flow velocity sensors.
The beneficial effects of the application are as follows:
The pressure in the pressure regulating pipeline is regulated once through the pressure regulator, and the pressure compensator is used for regulating the pressure in the pressure regulating pipeline twice, so that the number of the pressure compensators is multiple, successive secondary regulation can be realized, and the regulation mode can realize pressure stabilization in the pressure regulating pipeline and pressure stabilization at each terminal connected with the pressure regulating pipeline.
Drawings
Fig. 1 is a deployment schematic diagram of a stepless adjustable electric pressure relief valve control system provided by the application.
Fig. 2 is a schematic structural diagram of a stepless adjustable electric pressure release valve control system provided by the application.
Fig. 3 is a schematic structural view of a pressure regulator provided by the present application.
Fig. 4 is a schematic structural diagram of a differential pressure sensor provided by the present application.
Fig. 5 is a schematic view of area division on a membrane according to the present application.
Fig. 6 is a schematic diagram of a deformation process on a membrane according to the present application.
Fig. 7 is a schematic view showing the distribution of guide ridges on a film sheet according to the present application.
Fig. 8 is a schematic structural view of a pressure compensator provided by the present application.
Fig. 9 is a schematic view of the position of an annular adjusting air bag provided by the application.
Fig. 10 is a schematic diagram of the working process of the annular adjusting air bag provided by the application.
In the figure, 11, a pressure regulating pipeline, 12, a differential pressure sensor, 13, a pressure regulator, 14, a pressure compensator, 22, an annular regulating air bag, 23, a pressure regulator, 6, a controller, 121, a main body, 122, a detecting body, 123, an open detecting cavity, 124, a diaphragm, 125, a telescopic F-P contact pressure sensor, 126, a guide ridge, 141, an annular compensating bin, 142, a compensating pipeline, 143 and a compensating water pump.
Detailed Description
The technical scheme in the application is further described in detail below with reference to the accompanying drawings.
The application discloses a 0-210MPa stepless adjustable electric pressure release valve control system, referring to FIG. 1 (a dotted line frame in the figure is a deployment position of the 0-210MPa stepless adjustable electric pressure release valve control system disclosed by the application) and FIG. 2, in some examples, the 0-210MPa stepless adjustable electric pressure release valve control system disclosed by the application comprises a pressure regulating pipeline 11, a pressure difference sensor 12, a pressure regulator 13 and a pressure compensator 14, wherein the number of the pressure difference sensors 12 is a plurality, and the pressure difference sensors 12 are arranged in the pressure regulating pipeline 11 at intervals.
The pressure regulator 13 is installed at the proximal end of the pressure regulating pipe 11, and the pressure compensator 14 is installed at the distal end of the pressure regulating pipe 11, where the proximal and distal ends refer to both ends of the pressure regulating pipe 11, and the proximal and distal ends are just names for convenience of description.
As for the pressure regulator 13, the structure thereof can be shown with reference to fig. 3.
The pressure regulator 13 primarily regulates the internal pressure of the pressure regulating pipe 11 based on feedback from the differential pressure sensor 12, and the pressure compensator 14 secondarily regulates the internal pressure of the pressure regulating pipe 11.
The plurality of adjustment ends of the pressure compensator 14 are connected to the pressure adjustment pipe 11 in order to secondarily adjust the internal pressure of the pressure adjustment pipe 11. There is one adjustment end of the pressure compensator 14 in front of each differential pressure sensor 12, and there is only one adjustment end of the pressure compensator 14 between any two adjacent differential pressure sensors 12.
It will be appreciated that there is some error in the pressure regulation of the pressure inside the pressure regulating conduit 11 by the pressure regulator 13, which error is further amplified when the pressure inside the pressure regulating conduit 11 is large.
For the working mode of the pressure regulator 13, flow area control is generally used, the pressure regulator 13 can be regarded as a valve controlled by a motor, and when a valve core in the valve rotates, the flow area in the valve synchronously changes, so that the flow parameter of the medium in the pressure regulating pipeline 11 changes.
In addition, it is also noted that if the pipe diameter (flow area) becomes small, the flow rate becomes small accordingly, and the variation is very remarkable. This is because the flow in the pipe is kept constant for the same time according to the law of conservation of flow, and therefore when the pipe diameter becomes small, the flow rate increases, resulting in an increase in frictional resistance. As resistance increases, more pressure is required to maintain the same water flow.
Thus, as the tube diameter becomes smaller, a higher pressure is required to maintain the same water flow, while if the pressure is unchanged, the water flow decreases.
In general, the operating parameters of the pressure regulator 13 are provided by end sensors, which results in a certain hysteresis in the action of the pressure regulator 13. In view of this problem, the present application adopts a mode of adjusting the pressure regulator 13 and the pressure compensator 14 together, and the specific procedures are as follows:
When the number of the terminals changes (increases or decreases), the feeding system is required to adjust the feeding amount in time, and for the terminals with unchanged states, the demand of the terminals for the raw materials (media) is unchanged, which requires that the flow speed of the raw materials (media) in each branch pipeline is unchanged, and the situation is described:
When the number of the terminals is increased, the output pressure of the feeding system is increased;
as the number of terminals decreases, the output pressure of the feed system decreases;
Since the pressure is positively correlated with the flow rate of the raw material (medium), the feed system should be adjusted for the raw material (medium) in a single adjustment, i.e. the adjustment can be described simply as calculating the raw material demand for each end only once.
But this causes a non-linear change in the flow velocity of the raw material (medium) inside the pressure-regulating conduit 11, for which pressure-regulating conduit 11 it is still necessary to achieve a constant flow velocity at the distal end.
In order to solve the problem, the application uses a continuous different position compensation mode, uses the water pressure of raw materials (media) as compensation basis at each compensation position, reduces the flow speed when the water pressure is too high, and increases the flow speed when the water pressure is too low.
In the present application, referring to fig. 4, the differential pressure sensor 12 includes a main body 121, a detecting body 122, an open detecting cavity 123, a diaphragm 124, and a telescopic F-P contact pressure sensor 125, wherein the main body 121 is fixedly installed on an inner wall of the pressure adjusting pipe 11, the detecting body 122 is installed on the main body 121, and the detecting body 122 has an open detecting cavity 123.
A diaphragm 124 is mounted on the detecting body 122 and closes the open detecting chamber 123, and the diaphragm 124 functions to deform. A telescopic F-P contact pressure sensor 125 is installed in the open sensing chamber 123 and functions to sense the deformation amount of the diaphragm 124.
This requires that the axis of the telescopic F-P contact pressure sensor 125 and the axis of the open sensing chamber 123 be on the same line, because the amount of deformation at the center of the diaphragm 124 needs to be sensed, and the sensing end of the telescopic F-P contact pressure sensor 125 abuts against the diaphragm 124 at the time of sensing.
The telescopic F-P contact pressure sensor 125 includes a linear telescopic member and an F-P contact pressure sensor mounted on the linear telescopic member, and the working principle of the F-P contact pressure sensor is the interference principle of light, so that the detection accuracy is higher.
But this also results in a limited detection range of the F-P contact pressure sensor, and the solution of the present application is to use the sum of the amount of movement of the linear expansion element and the variable of the F-P contact pressure sensor as the deformation amount of the diaphragm 124.
In some possible implementations, referring to fig. 5, the area on the diaphragm 124 is divided into a rigid contact area (circular area in fig. 5) and a flexible contact area (annular area in fig. 5), the rigid contact area is located inside the flexible contact area, and the detection end of the telescopic F-P contact pressure sensor 125 abuts on the rigid contact area.
In some possible implementations, the rigid contact area is affixed to the diaphragm 124 at a central location using a circular piece that is stronger than the diaphragm 124.
Referring to fig. 6, the contact area between the diaphragm 124 and the telescopic F-P contact pressure sensor 125 can be increased, so that the detection data can be obtained through the telescopic F-P contact pressure sensor 125.
Further, referring to fig. 7, a plurality of guiding ridges 126 exist on the flexible expansion area, one end of the guiding ridge 126 is located at the inner edge of the flexible expansion area, the other end of the guiding ridge 126 is located at the outer edge of the flexible expansion area, and the guiding ridge 126 is used for ensuring that the deformation direction of the membrane 124 can be matched with the predetermined direction when the membrane is deformed.
Further, a plurality of F-P cavities exist on the detecting end of the telescopic F-P contact pressure sensor 125, and the plurality of F-P cavities are all abutted against the diaphragm 124, so that a more accurate pressure value can be obtained by means of average calculation.
In some examples, referring to fig. 8, the pressure compensator 14 includes an annular compensating chamber 141, a compensating pipe 142, and a compensating water pump 143, the annular compensating chamber 141 being located on the pressure adjusting pipe 11 and communicating with the space within the pressure adjusting pipe 11, the compensating pipe 142 having a first end connected to the annular compensating chamber 141 and a second end connected to the compensating water pump 143, the compensating water pump 143 also being electrically connected to the controller 6.
The specific operation mode of the pressure compensator 14 is that when the pressure of the pressure regulating pipeline 11 is too high, the pressure compensator 14 reduces the pressure of the pressure regulating pipeline 11 in a split-flow mode; when the pressure of the pressure-adjusting pipe 11 is too low, the pressure compensator 14 increases the pressure of the pressure-adjusting pipe 11 by supplementing the raw material (medium).
In some possible implementations, the first end of the compensation conduit 142 also extends into the interior of the annular compensation chamber 141.
Further, referring to fig. 9 and 10, an annular regulating air bag 22 and an air pressure regulator 23 are added, the annular regulating air bag 22 is located inside the pressure regulating pipe 11, and the annular regulating air bag 22 is located behind the annular compensating chamber 141 in the medium flow direction inside the pressure regulating pipe 11.
It should be understood that, when the pressure compensator 14 increases the pressure of the pressure-adjusting pipe 11 by supplementing the raw material (medium), the pressure distribution inside the pressure-adjusting pipe 11 may be uneven due to the structural form of the pressure compensator 14.
The annular regulator bladder 22 may form a variable diameter region behind the pressure compensator 14 by way of a volume increase that may promote a pressure distribution that tends to be uniform inside the pressure regulator tube 11.
Further, the number of the annular regulating airbags 22 is plural, one annular regulating airbag 22 exists behind each pressure compensator 14 in the medium flow direction in the pressure regulating pipe 11, and only one annular regulating airbag 22 exists between any two adjacent flow rate sensors 21.
The embodiments of the present application are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in this way, therefore: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (9)
1. A0-210 MPa stepless adjustable electric pressure release valve control system is characterized by comprising:
a pressure regulating conduit (11);
a plurality of differential pressure sensors (12) arranged in the pressure regulating pipeline (11) at intervals;
a pressure regulator (13) provided at the proximal end of the pressure regulating pipe (11), the pressure regulator (13) regulating the internal pressure of the pressure regulating pipe (11) once according to the feedback of the differential pressure sensor (12);
The pressure compensator (14) is arranged at the far end of the pressure regulating pipeline (11), a plurality of regulating ends of the pressure compensator (14) are connected with the pressure regulating pipeline (11), and the pressure compensator (14) is used for secondarily regulating the internal pressure of the pressure regulating pipeline (11);
a controller (6) electrically connected with the differential pressure sensor (12), the pressure regulator (13) and the pressure compensator (14);
wherein, the front of each differential pressure sensor (12) is provided with an adjusting end of a pressure compensator (14), and only one adjusting end of the pressure compensator (14) is arranged between any two adjacent differential pressure sensors (12).
2. The 0-210MPa stepless adjustable electric pressure relief valve control system according to claim 1, characterized in that the differential pressure sensor (12) comprises:
a main body (121) provided on the pressure regulating pipe (11);
A detection body (122) provided on the main body (121), and an open detection chamber (123) is provided on the detection body (122);
A diaphragm (124) which is provided on the detection body (122) and closes the open detection chamber (123);
The telescopic F-P contact pressure sensor (125) is arranged in the open detection cavity (123), and the axis of the telescopic F-P contact pressure sensor (125) and the axis of the open detection cavity (123) are positioned on the same straight line;
The detection end of the telescopic F-P contact pressure sensor (125) is abutted against the diaphragm (124).
3. The 0-210MPa stepless adjustable electric pressure relief valve control system of claim 2, characterized in that the area on the diaphragm (124) is divided into a rigid contact area and a flexible expansion area;
The rigid contact area is positioned inside the flexible expansion area;
The detection end of the telescopic F-P contact pressure sensor (125) is abutted on the rigid contact area.
4. A 0-210MPa stepless adjustable electric pressure release valve control system according to claim 3, characterized in that there are a plurality of guiding ridges (126) on the flexible expansion zone, one end of the guiding ridge (126) is located at the inner edge of the flexible expansion zone, and the other end of the guiding ridge (126) is located at the outer edge of the flexible expansion zone.
5. The 0-210MPa stepless adjustable electric pressure release valve control system of any one of claims 2-4, wherein a plurality of F-P cavities are present on the detection end of the telescopic F-P contact pressure sensor (125), and each F-P cavity is abutted against the diaphragm (124).
6. The 0-210MPa stepless adjustable electric pressure relief valve control system according to claim 1, characterized in that the pressure compensator (14) comprises:
The annular compensation bin (141) is arranged on the pressure regulating pipeline (11) and is communicated with the space in the pressure regulating pipeline (11);
A compensation pipe (142) with a first end connected to the annular compensation chamber (141);
and the compensation water pump (143) is connected with the second end of the compensation pipeline (142), and the compensation water pump (143) is also electrically connected with the controller (6).
7. The 0-210MPa stepless adjustable electric pressure relief valve control system of claim 6, wherein the first end of the compensation pipe (142) also extends into the annular compensation chamber (141) everywhere.
8. The 0-210MPa stepless adjustable electric pressure relief valve control system of claim 1, further comprising:
the annular adjusting air bag (22) is arranged inside the pressure adjusting pipeline (11), and the annular adjusting air bag (22) is positioned behind the annular compensating bin (141) in the medium flow direction in the pressure adjusting pipeline (11);
A gas pressure regulator (23) connected with the annular regulating air bag (22);
The air pressure regulator (23) is electrically connected with the controller (6).
9. The 0-210MPa stepless adjustable electric pressure release valve control system according to claim 8, wherein,
The number of the annular adjusting air bags (22) is multiple, and one annular adjusting air bag (22) is arranged behind each annular compensating bin (141) in the medium flowing direction in the pressure adjusting pipeline (11);
Only one annular adjusting air bag (22) exists between any two adjacent annular compensating bins (141).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410889890.XA CN118408151B (en) | 2024-07-04 | 2024-07-04 | 0-210MPa electrodeless adjustable electric pressure relief valve control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410889890.XA CN118408151B (en) | 2024-07-04 | 2024-07-04 | 0-210MPa electrodeless adjustable electric pressure relief valve control system |
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| CN118408151A true CN118408151A (en) | 2024-07-30 |
| CN118408151B CN118408151B (en) | 2024-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| Publication number | Publication date |
|---|---|
| CN118408151B (en) | 2024-09-10 |
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