CN215982028U - Pressure and temperature regulating system - Google Patents
Pressure and temperature regulating system Download PDFInfo
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- CN215982028U CN215982028U CN202122079248.XU CN202122079248U CN215982028U CN 215982028 U CN215982028 U CN 215982028U CN 202122079248 U CN202122079248 U CN 202122079248U CN 215982028 U CN215982028 U CN 215982028U
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Abstract
The utility model discloses a pressure and temperature regulating system. The device comprises a medium pipeline, an inlet arranged at the input end of the medium pipeline, a discharge outlet arranged at the output end of the medium pipeline, a temperature reduction mixing chamber, a buffer and a silencer which are sequentially arranged on the medium pipeline, and a test piece arranged between the buffer and the silencer; the temperature-reducing mixing chamber is connected with a temperature-reducing water input pipeline system; the system also comprises a multi-position monitoring system which is used for monitoring signals of flow, pressure and temperature in the medium pipeline; and the controller is used for adjusting the sizes of the flow control valve, the temperature control valve, the plurality of pressure control valves and the plurality of back pressure control valves according to the signals of the flow, the pressure and the temperature in the medium pipeline. The system increases the regulation range of pressure and temperature, automatically and intelligently regulates when the system runs in a variable parameter mode, automatically controls process parameters and accurately regulates according to multi-contact information feedback under the condition of no need of human interference, and ensures the stability and accuracy of the variable parameter running of the system.
Description
Technical Field
The utility model belongs to the technical field of industrial or domestic centralized or decentralized heat supply pressure container equipment, and particularly relates to a pressure and temperature regulating system.
Background
When the existing temperature and pressure reducing device is used for multi-stage regulation, the structure of a single pressure control valve and a multi-stage pressure reducing pore plate is generally adopted to regulate the pressure; the temperature regulation is controlled by adopting a structure of a throttle valve/a throttling device plus a flow control valve; the control system is single-point control; meanwhile, the number of monitoring points of the system process parameters is small. The existing temperature and pressure reducing device has the following defects:
1. the pressure is regulated by a single pressure control valve, the regulation range of the pressure is limited, and the regulation precision is poor; the pressure control valve and the multi-stage pressure reduction pore plate are only suitable for systems with stable pressure parameters and small running parameter deviation. When the system parameters change greatly, the fixed pressure reduction function of the pressure reduction pore plate can not be ensured, and the pressure regulation can not meet the operation requirement only by the pressure control valve;
2. the temperature regulation is ensured only by the regulation of a single flow control valve, and the risks of low regulation precision and poor regulation effect exist;
3. the control system is single-point control, the control process is not consistent, the automation degree is low, and the adjusting effect is poor;
4. the monitoring points of the system process parameters are few, the feedback information is not accurate enough, and the feedback is delayed.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a pressure and temperature regulating system for solving the above-mentioned drawbacks of the prior art.
The technical scheme adopted by the utility model is as follows: a pressure and temperature regulating system comprises a medium pipeline, an inlet arranged at the input end of the medium pipeline, a discharge outlet arranged at the output end of the medium pipeline, a temperature reduction mixing chamber, a buffer and a silencer which are sequentially arranged on the medium pipeline, and a test piece arranged between the buffer and the silencer; the temperature-reducing mixing chamber is connected with a temperature-reducing water input pipeline system; also comprises
The multi-position monitoring system is used for monitoring signals of flow, pressure and temperature in the medium pipeline;
and the controller is used for adjusting the sizes of the flow control valve, the temperature control valve, the plurality of pressure control valves and the plurality of back pressure control valves according to the signals of the flow, the pressure and the temperature in the medium pipeline.
And a first shutoff valve and a flow control valve are arranged between the inlet and the temperature-reducing mixing chamber, and the plurality of pressure control valves are arranged on a medium pipeline between the flow control valve and the temperature-reducing mixing chamber and a temperature-reducing water input pipeline system.
The plurality of pressure control valves comprise a first pressure control valve, a second pressure control valve and a third pressure control valve, wherein the first pressure control valve and the second pressure control valve are arranged on a medium pipeline between the flow control valve and the temperature reduction mixing chamber.
The desuperheating water input pipeline system comprises a pump, and the desuperheating water mixing chamber is connected with the pump through a desuperheating water medium pipeline; and a second shutoff valve, a third pressure control valve and a temperature control valve are arranged on the desuperheating water medium pipeline.
Wherein, the medium pipeline is a mixture of water and water vapor; liquid water is in the temperature-reducing water medium pipeline.
The back pressure control valves are arranged on the medium pipeline between the test piece and the silencer.
The plurality of back pressure control valves includes a first back pressure control valve, a second back pressure control valve, and a third back pressure control valve.
The multi-site monitoring system comprises:
the first pressure sensor is arranged on a medium pipeline at the rear end of the first pressure control valve and used for collecting pressure signals;
the second pressure sensor is arranged on a medium pipeline at the rear end of the second pressure control valve and used for collecting pressure signals;
the third pressure sensor is arranged on a medium pipeline at the front end of the buffer and used for collecting pressure signals;
the fourth pressure sensor is arranged on the test piece and used for collecting pressure signals;
the first temperature sensor is arranged on the medium pipeline at the front end of the buffer and used for collecting temperature signals;
the second temperature sensor is arranged on the test piece and used for acquiring a temperature signal;
the first flow monitoring meter is arranged on the test piece and used for acquiring a flow signal;
and the second flow monitoring meter is arranged on the medium pipeline at the rear end of the flow control valve and is used for acquiring flow signals.
The controller is used for adjusting the sizes of the first pressure control valve, the second pressure control valve, the third pressure control valve, the first back pressure control valve, the second back pressure control valve and the third back pressure control valve according to pressure signals acquired by the first pressure sensor, the second pressure sensor, the third pressure sensor and the fourth pressure sensor;
the controller is used for adjusting the size of the temperature control valve according to the temperature signals collected by the first temperature sensor and the second temperature sensor;
the controller is used for adjusting the size of the flow control valve according to the flow signals collected by the first flow monitoring meter and the second flow monitoring meter.
And the pressure control valves of the inlet of the medium pipeline input end and the outlet of the medium pipeline output end are used for pressure distribution according to the decompression ratio rho of 0.546.
The utility model is composed of a shut-off valve, a flow control valve, a pressure control valve, a temperature reduction mixing chamber, a back pressure control valve, pressure and temperature sensors, a flow monitoring meter, a control system and the like.
The on-off valve control system is switched on and off, a proper stop valve and a proper gate valve are selected to realize the switching function, and a signal input point is connected into a central control room or a system operation program to automatically control the system to be switched on and off according to set conditions.
The flow control valve controls the medium flow entering the system, and regulating valves with different structures and pressure levels can be selected according to requirements to realize the control of the medium flow.
The pressure control valve performs step adjustment on the system pressure, and the pressure reduction stage is determined according to the difference value between the system inlet medium pressure and the system required outlet pressure.
The temperature-reducing mixing chamber is formed by combining and distributing the pressure and the flow of the temperature-reducing water through a temperature-reducing nozzle, the temperature-reducing water, a flow control valve, a pressure control valve, a switch valve and the like, and the combined action finally achieves the temperature-reducing effect.
The back pressure control valves of different grades are arranged to adjust the back pressure of the system according to the pressure grade required by the system, so that the stability and accuracy of the operation parameters are ensured.
A group of pressure sensors are arranged behind each stage of pressure control valve and used for accurately monitoring the pressure change process; a group of temperature sensors are respectively arranged at an inlet and an outlet of the main pipeline to monitor the temperature change of the inlet and the outlet of the system; the inlet of the system is provided with a flow monitoring meter for monitoring the change of the medium flow at the inlet of the system in real time.
The control system consists of a detection element, a transmitter, a controller, an actuator and a controlled object. The detecting element and the transmitter are used for detecting the controlled variable and converting the detection signal into a standard signal. The controller compares the standard signal output by the detection and transmission link with a set value to obtain a deviation signal, calculates the deviation signal according to a certain control rule, outputs the calculation to the actuator, can be realized by an analog instrument, and can also be realized by a digital controller consisting of a microprocessor, such as a PID control function module adopted in DCS and FCS. The actuator is in the final position of the control loop, i.e. the final element. The actuator is used for receiving the output signal of the controller and controlling the change of various technical parameters in the system. When the load of the production process changes or the operating condition changes, the controlled variable of the process is transmitted to the controller through the detection and transmission of the detection element and the transmitter, and then the controlled variable is output to the actuator of the regulating valve after the regular operation of the controller, so that the corresponding technical parameters in the process are changed, and the controlled variable is consistent with the set value.
The utility model mainly aims at the pressure and temperature control system which operates in a variable parameter manner, increases the adjustment range of pressure and temperature, automatically and intelligently adjusts the system in the variable parameter manner, automatically controls process parameters and accurately adjusts the process parameters according to multi-contact information feedback without human intervention, and ensures the stability and accuracy of the variable parameter operation of the system.
The intelligent linkage processing of the control system is arranged in the system, and the existing single-point independent control is upgraded into linear continuous control; meanwhile, an intelligent operation module is added in the control system, manual interference is not needed when the system is in variable parameter operation, the system can automatically control the action of the valve according to a preset operation curve, the operation parameters are automatically adjusted, and the stability and the accuracy of the system operation are improved.
The utility model adds a multi-position monitoring system, namely a pressure sensor, a temperature sensor and a flow monitoring meter, in the system, can accurately monitor the change process of variable parameters in the system on line in real time and feed back the variable parameters to the control system in time, provides accurate data for system operation, provides data support for accurate control of the system and improves the precision degree of system operation.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Wherein, 1-a first shut-off valve, 2-a second shut-off valve, 3-a flow control valve, 4-a first pressure control valve, 5-a second pressure control valve, 6-a third pressure control valve, 7-a temperature control valve, 8-a first back pressure control valve, 9-a second back pressure control valve, 10-a third back pressure control valve, 11-a pump, 12-a temperature reduction mixing chamber, 13-a buffer, 14-a test piece, 15-a silencer, 16-a controller, 17-a first pressure sensor, 18-a second pressure sensor, 19-a third pressure sensor, 20-a fourth pressure sensor, 21-a first temperature sensor, 22-a second temperature sensor, 23-a first flow monitor, 24-a second flow monitor, A-inlet and B-discharge.
Detailed Description
The utility model will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the utility model, but are for clear understanding.
As shown in fig. 1, the pressure and temperature regulating system of the present invention comprises a medium pipeline, an inlet a disposed at an input end of the medium pipeline, a discharge port B disposed at an output end of the medium pipeline, a temperature-reducing mixing chamber 12, a buffer 13, a silencer 15 sequentially disposed on the medium pipeline, and a test piece 14 disposed between the buffer 13 and the silencer 15; the temperature-reducing mixing chamber 12 is connected with a temperature-reducing water input pipeline system; also comprises
The multi-position monitoring system is used for monitoring signals of flow, pressure and temperature in the medium pipeline;
and a controller 16 for adjusting the sizes of the flow control valve 3, the temperature control valve 7, the plurality of pressure control valves, and the plurality of back pressure control valves according to the signals of the flow rate, the pressure, and the temperature in the medium pipeline.
A first shutoff valve 1 and a flow control valve 3 are arranged between the inlet A and the temperature-reducing mixing chamber 12, and the pressure control valves are arranged on a medium pipeline between the flow control valve 3 and the temperature-reducing mixing chamber 12 and a temperature-reducing water input pipeline system.
The pressure control valves comprise a first pressure control valve 4, a second pressure control valve 5 and a third pressure control valve 6, wherein the first pressure control valve 4 and the second pressure control valve 5 are arranged on a medium pipeline between the flow control valve 3 and the temperature-reducing mixing chamber 12.
The desuperheating water input pipeline system comprises a pump 11, and the desuperheating water mixing chamber 12 is connected with the pump 11 through a desuperheating water medium pipeline; and a second shut-off valve 2, a third pressure control valve 6 and a temperature control valve 7 are arranged on the desuperheating water medium pipeline.
The back pressure control valves are arranged on the medium pipeline between the test piece 14 and the silencer 15.
The plurality of back pressure control valves include a first back pressure control valve 8, a second back pressure control valve 9, and a third back pressure control valve 10.
The multi-site monitoring system comprises:
the first pressure sensor 17 is arranged on a medium pipeline at the rear end of the first pressure control valve 4 and used for collecting pressure signals;
the second pressure sensor 18 is arranged on a medium pipeline at the rear end of the second pressure control valve 5 and used for collecting pressure signals;
the third pressure sensor 19 is arranged on a medium pipeline at the front end of the buffer 13 and used for collecting pressure signals;
the fourth pressure sensor 20 is arranged on the test piece 14 and used for collecting pressure signals;
the first temperature sensor 21 is arranged on a medium pipeline at the front end of the buffer 13 and used for collecting temperature signals;
the second temperature sensor 22 is arranged on the test piece 14 and used for acquiring a temperature signal;
the first flow monitor 23 is arranged on the test piece 14 and used for acquiring a flow signal;
and the second flow monitoring meter 24 is arranged on a medium pipeline at the rear end of the flow control valve 3 and is used for acquiring flow signals.
The controller 16 is used for adjusting the sizes of the first pressure control valve 4, the second pressure control valve 5, the third pressure control valve 6, the first back pressure control valve 8, the second back pressure control valve 9 and the third back pressure control valve 10 according to the pressure signals collected by the first pressure sensor 17, the second pressure sensor 18, the third pressure sensor 19 and the fourth pressure sensor 20;
the controller 16 is used for adjusting the size of the temperature control valve 7 according to the temperature signals collected by the first temperature sensor 21 and the second temperature sensor 22;
the controller 16 is used for adjusting the size of the flow control valve 3 according to the flow signals collected by the first flow monitor meter 23 and the second flow monitor meter 24.
And the pressure control valves of the inlet A of the medium pipeline input end and the outlet B of the medium pipeline output end are subjected to pressure distribution according to the decompression ratio rho of 0.546.
The operation principle of the control system is as follows:
1. designing and inputting required flow, pressure and temperature values;
2. a circuit is as follows: the actual value Q measured by the flow monitoring point is compared with the flow value QF input by design, and then
a: q is QF +/-1.2 t/h, the flow control valve 3 does not act, and the initial state is kept;
b: q is more than QF +1.2t/h, the flow control valve 3 is automatically adjusted, the flow area is reduced, and the flow control valve is fixed at an adjusting position after meeting the flow requirement;
c: q is less than QF-1.2t/h, the flow control valve 3 is automatically adjusted, the flow area is increased, and the flow control valve is fixed at an adjusting position after meeting the flow requirement;
3. a circuit II: comparing the actual value P measured by the pressure signal sampling point with the designed input pressure value PF, then
(1) When the second pressure level is not more than PF and less than the first pressure level:
a: when P is PF ± 0.15MPa, the first pressure control valve 4 and the second pressure control valve 5 are not actuated and remain in the initial state;
b: p is more than PF +0.15MPa, the first pressure control valve 4 is automatically adjusted, the flow area is reduced, the pressure loss is increased, the first pressure control valve is fixed at an adjusting position after the pressure requirement is met, and the second pressure control valve 5 is kept in a full-open state;
c: p is less than PF-0.15MPa, the first pressure control valve 4 is automatically adjusted, the flow area is increased, the pressure loss is reduced, the first pressure control valve is fixed at an adjusting position after the pressure requirement is met, and the second pressure control valve 5 is kept in a full-open state;
(2) when the third pressure level is less than or equal to PF and less than the second pressure level, the first pressure control valve 4 is arranged at the first pressure sensor 17, and the pressure P1 is a second pressure level value:
a: when P is PF ± 0.15MPa, the first pressure control valve 4 and the second pressure control valve 5 are not actuated and remain in the initial state;
b: p is more than PF +0.15MPa, the second pressure control valve 5 is automatically adjusted, the flow area is reduced, the pressure loss is increased, the pressure control valve is fixed at an adjusting position after the pressure requirement is met, and the first pressure control valve 4 is used for fine adjustment compensation;
c: p is less than PF-0.15MPa, the second pressure control valve 5 is automatically adjusted, the flow area is increased, the pressure loss is reduced, the pressure control valve is fixed at an adjusting position after the pressure requirement is met, and the first pressure control valve 4 is used for fine adjustment compensation;
4. line (c): the actual value T measured by the temperature signal sampling point is compared with the designed input temperature value TF, then
a: t is TF ± 3 ℃, the temperature control valve 7 does not operate, and the initial state is maintained;
b: t is more than TF +3 ℃, the temperature control valve 7 automatically adjusts, increases the flow area, increases the amount of desuperheating water, and is fixed at an adjusting position after the temperature requirement is met;
c: t is less than TF-3 ℃, the temperature control valve 7 automatically adjusts, reduces the flow area, reduces the amount of temperature reduction water, and is fixed at an adjusting position after the temperature requirement is met;
5. in the running process of the system, the first back pressure control valve 8, the second back pressure control valve 9 and the third back pressure control valve 10 are always in a continuous automatic regulation state.
The working principle of the system of the utility model is as follows:
the control of the pressure, the temperature and the flow of the system is regulated by corresponding control valves, the control area of each valve is set according to the change of the system operation parameters, when the system operation parameters meet the operation setting parameter range of a certain valve, the system automatically sends an instruction to the valve actuator to drive the valve to move up and down, the medium flow of a medium flowing through the valve is changed, and therefore the change of the flow, the pressure and the temperature of the medium passing through the valve is changed.
The working principle of the control system is as follows:
the control system receives and converts the monitoring signals transmitted by each monitoring unit in the monitoring system, compares the monitoring signals with the initial setting values in the system, calculates the deviation signals according to a certain control rule, then sends out adjusting instructions suitable for system operation, conveys the adjusting instructions to each execution unit, and guides the execution units to act, so that the operation parameters of each adjusting system are changed, and the normal and stable operation of the system is ensured.
The connection of each adjusting unit of the system is in series connection, and the action condition of other control units can be influenced when one unit acts, so that the control process is a linear continuous change process until the final parameters are determined, and the system starts to operate stably; the adjustment process is an intelligent automatic adjustment process.
The utility model changes the single and small-range adjusting pressure and temperature adjusting system in the existing system into the composite and large-range adjusting pressure and temperature control system, increases the operating range of system parameters and improves the adjusting capability of the system; the operation requirements of clients on multi-parameter and large-range adjustment are met, the utilization rate of products is improved, repeated purchase of equipment is reduced, and the purchase cost of enterprises is reduced.
The intelligent linkage processing of the control system is set in the system design, and the original single-point independent control is upgraded into linear continuous control; meanwhile, an intelligent operation module is added in the control system, so that manual interference is not needed when the system is operated in a variable parameter mode, and the stability and the accuracy of the operation of the system are improved; meanwhile, the efficiency of variable parameter debugging of the system is improved, the possibility of error during manual debugging is avoided, and the manual debugging cost is saved.
The system is additionally provided with a multi-position monitoring system, namely a pressure sensor, a temperature sensor and a flow monitoring meter, so that the change process of variable parameters in the system can be monitored accurately on line in real time and fed back to the control system in time, and technicians can know the operation condition of the system accurately in time; meanwhile, powerful data support is provided for real-time operation and accurate control of the system, and the precision of system operation is improved.
Those not described in detail in this specification are within the skill of the art.
Claims (9)
1. A pressure temperature regulation system, includes medium pipeline, its characterized in that: an inlet (A) and a discharge outlet (B) which are arranged at the input end and the output end of the medium pipeline, a temperature-reducing mixing chamber (12), a buffer (13) and a silencer (15) which are arranged on the medium pipeline in sequence, and a test piece (14) which is arranged between the buffer (13) and the silencer (15); the temperature-reducing mixing chamber (12) is connected with a temperature-reducing water input pipeline system; also comprises
The multi-position monitoring system is used for monitoring signals of flow, pressure and temperature in the medium pipeline;
and a controller (16) for adjusting the size of the flow control valve (3), the temperature control valve (7), the plurality of pressure control valves and the plurality of back pressure control valves according to the signals of the flow, the pressure and the temperature in the medium pipeline.
2. The pressure and temperature regulation system of claim 1, wherein: a first shut-off valve (1) and a flow control valve (3) are arranged between the inlet (A) and the desuperheating mixing chamber (12), and the pressure control valves are arranged on a medium pipeline between the flow control valve (3) and the desuperheating mixing chamber (12) and a desuperheating water input pipeline system.
3. The pressure and temperature regulation system of claim 2, wherein: the plurality of pressure control valves comprise a first pressure control valve (4), a second pressure control valve (5) and a third pressure control valve (6), wherein the first pressure control valve (4) and the second pressure control valve (5) are arranged on a medium pipeline between the flow control valve (3) and the temperature-reducing mixing chamber (12).
4. The pressure and temperature regulation system of claim 3, wherein: the desuperheating water input pipeline system comprises a pump (11), and the desuperheating water mixing chamber (12) is connected with the pump (11) through a desuperheating water medium pipeline; and a second shut-off valve (2), a third pressure control valve (6) and a temperature control valve (7) are arranged on the desuperheating water medium pipeline.
5. The pressure and temperature regulation system of claim 1, wherein: the back pressure control valves are arranged on a medium pipeline between the test piece (14) and the silencer (15).
6. The pressure and temperature regulation system of claim 5, wherein: the plurality of back pressure control valves include a first back pressure control valve (8), a second back pressure control valve (9), and a third back pressure control valve (10).
7. The pressure temperature regulation system of any one of claims 1 to 6, wherein: the multi-site monitoring system comprises:
the first pressure sensor (17) is arranged on a medium pipeline at the rear end of the first pressure control valve (4) and is used for acquiring pressure signals;
the second pressure sensor (18) is arranged on a medium pipeline at the rear end of the second pressure control valve (5) and is used for acquiring pressure signals;
the third pressure sensor (19) is arranged on a medium pipeline at the front end of the buffer (13) and is used for acquiring pressure signals;
the fourth pressure sensor (20) is arranged on the test piece (14) and used for acquiring a pressure signal;
the first temperature sensor (21) is arranged on a medium pipeline at the front end of the buffer (13) and is used for acquiring temperature signals;
the second temperature sensor (22) is arranged on the test piece (14) and used for acquiring a temperature signal;
the first flow monitoring meter (23) is arranged on the test piece (14) and is used for acquiring a flow signal;
and the second flow monitoring meter (24) is arranged on a medium pipeline at the rear end of the flow control valve (3) and is used for acquiring flow signals.
8. The pressure and temperature regulation system of claim 7, wherein:
the controller (16) is used for adjusting the sizes of the first pressure control valve (4), the second pressure control valve (5), the third pressure control valve (6), the first back pressure control valve (8), the second back pressure control valve (9) and the third back pressure control valve (10) according to pressure signals collected by the first pressure sensor (17), the second pressure sensor (18), the third pressure sensor (19) and the fourth pressure sensor (20);
the controller (16) is used for adjusting the size of the temperature control valve (7) according to the temperature signals collected by the first temperature sensor (21) and the second temperature sensor (22);
the controller (16) is used for adjusting the size of the flow control valve (3) according to the flow signals collected by the first flow monitoring meter (23) and the second flow monitoring meter (24).
9. The pressure and temperature regulation system of claim 1, wherein: and the pressure control valves of the inlet (A) of the medium pipeline input end and the outlet (B) of the medium pipeline output end carry out pressure distribution according to the decompression ratio rho of 0.546.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122079248.XU CN215982028U (en) | 2021-08-31 | 2021-08-31 | Pressure and temperature regulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122079248.XU CN215982028U (en) | 2021-08-31 | 2021-08-31 | Pressure and temperature regulating system |
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| Publication Number | Publication Date |
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| CN215982028U true CN215982028U (en) | 2022-03-08 |
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| CN202122079248.XU Active CN215982028U (en) | 2021-08-31 | 2021-08-31 | Pressure and temperature regulating system |
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| CN (1) | CN215982028U (en) |
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2021
- 2021-08-31 CN CN202122079248.XU patent/CN215982028U/en active Active
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