CN219085312U - Two-stage expander regulation control system - Google Patents
Two-stage expander regulation control system Download PDFInfo
- Publication number
- CN219085312U CN219085312U CN202223352195.5U CN202223352195U CN219085312U CN 219085312 U CN219085312 U CN 219085312U CN 202223352195 U CN202223352195 U CN 202223352195U CN 219085312 U CN219085312 U CN 219085312U
- Authority
- CN
- China
- Prior art keywords
- expander
- stage
- control module
- valve
- inlet
- 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
- Control Of Turbines (AREA)
Abstract
The utility model discloses a two-stage expander adjusting control system, which comprises a PCL controller, wherein the PCL controller is electrically connected with an expander, a first-stage inlet, a second-stage outlet and a high-speed shaft are arranged on the expander, the first-stage inlet is connected to the second-stage inlet through a heat conducting pipe, an adjusting valve is arranged at the interface of the first-stage inlet and the heat conducting pipe, an expander performance control module, an expander enthalpy supplementing control module, an expander overspeed protection control module and an expander running state monitoring control module are arranged in the PCL controller, and the PCL controller is electrically connected with the expander.
Description
Technical Field
The utility model relates to the technical field of expanders, in particular to a two-stage expander adjusting and controlling system.
Background
The expander is a machine which obtains energy by utilizing the principle that mechanical work is output outwards when compressed gas expands and reduces pressure so as to reduce the temperature of the gas. Expansion machines are commonly used in cryogenic equipment. The expansion machines are divided into two types of piston expansion machines and turbine expansion machines according to the movement form and the structure.
The existing expansion machine cannot be automatically adjusted in performance, excessive liquid and even ice are caused when the total outlet temperature of the expansion machine is too low, meanwhile, the rotating speed and other running states of the expansion machine cannot be monitored in real time, abnormal conditions cannot be found and treated in time, and equipment faults of the expansion machine are easily caused.
Therefore, in order to solve the deficiencies of the prior art, it is necessary to provide a two-stage expander adjustment control system.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a two-stage expander adjusting and controlling system, which is electrically connected with an expander through a PCL controller and used for adjusting the opening degree of a guide vane, the opening degree of a regulating valve, a cut-off valve and a bypass valve of the expander, so that the performance adjustment of the expander, the enthalpy compensation adjustment of a two-stage inlet, overspeed protection control and mechanical running state monitoring control are realized, the running safety of the expander is ensured from two stages of performance and state monitoring control of the expander, the equipment is prevented from failure, and real-time monitoring and adjustment are realized.
The above object of the present utility model is achieved by the following means.
The two-stage expander regulation control system comprises a PCL controller, wherein the PCL controller is electrically connected with an expander, a first-stage inlet, a second-stage outlet and a high-speed shaft are arranged on the expander, the first-stage inlet is connected to the second-stage inlet through a heat conducting pipe, a regulating valve is arranged at the interface of the first-stage inlet and the heat conducting pipe, and an expander performance control module, an expander enthalpy compensation control module, an expander overspeed protection control module and an expander running state monitoring control module are arranged in the PCL controller;
the expander performance control module is electrically connected to the first-stage inlet and the second-stage inlet respectively, the expander enthalpy compensation control module is electrically connected to the second-stage outlet and the regulating valve respectively, and the expander running state monitoring control module and the expander overspeed protection control module are electrically connected to the first-stage inlet, the second-stage inlet and the high-speed shaft respectively.
Specifically, a first cut-off valve, a first bypass valve, a first guide vane actuator and a first pressure transmitter are arranged on the first section of inlet, a second cut-off valve, a second bypass valve, a second guide vane actuator and a second pressure transmitter are arranged on the second section of inlet, and an expander performance control module is electrically connected with the first guide vane actuator, the first pressure transmitter, the second guide vane actuator and the second pressure transmitter respectively.
Preferably, the platinum thermal resistor is arranged on the second-section outlet, and the expander enthalpy-supplementing control module is electrically connected with the platinum thermal resistor and the regulating valve respectively.
Specifically, a voter is arranged on the overspeed protection control module of the expansion machine, a plurality of rotation speed monitors are arranged on the high-speed shaft, the voter is electrically connected with the rotation speed monitors, and the overspeed protection control module of the expansion machine is respectively and electrically connected with the voter, the first cut-off valve, the first bypass valve, the second cut-off valve and the second bypass valve.
Further, the number of the rotation speed monitors is the same as the number of voters of the voter.
Further, the expander running state monitoring control module is electrically connected with the first cut-off valve, the first bypass valve, the second cut-off valve, the second bypass valve and the high-speed shaft respectively.
Preferably, the high-speed shaft is further provided with a temperature monitor, a vibration monitor and a displacement monitor, and the temperature monitor, the vibration monitor and the displacement monitor are electrically connected to the monitoring control module of the running state of the expansion machine.
Preferably, the intersection of the heat pipe and the length of inlet is located on the side of the first shut-off valve adjacent the length of inlet.
According to the utility model, the PCL controller is electrically connected with the expander, and the opening degree of the guide vane, the opening degree of the regulating valve, the cut-off valve and the bypass valve of the expander are regulated, so that the performance regulation, the enthalpy compensation regulation of the two-stage inlet, the overspeed protection control and the mechanical running state monitoring control of the expander are realized, the running safety of the expander is ensured, the equipment is prevented from being failed, and the real-time monitoring and adjustment are realized.
Drawings
The utility model is further illustrated by the accompanying drawings, which are not to be construed as limiting the utility model in any way.
FIG. 1 is a system block diagram of a two-stage expander modulation control system of the present utility model.
FIG. 2 is a system block diagram of expander performance control of a two-stage expander modulation control system of the present utility model.
FIG. 3 is a block diagram of a system for expander enthalpy control for a two-stage expander modulation control system of the present utility model.
FIG. 4 is a system block diagram of an expander overspeed protection control of a two-stage expander modulation control system of the present utility model.
Fig. 5 is a system block diagram of expander operating condition monitoring control of a two-stage expander modulation control system of the present utility model.
From fig. 1 to 5, it includes:
1. a PCL controller;
11. an expander performance control module;
12. the enthalpy compensation control module of the expander;
13. an overspeed protection control module of the expander;
131. a voter;
14. the expander running state monitoring control module;
2. an expander;
21. a section of inlet;
211. a first shut-off valve 212, a first bypass valve 213, a first vane actuator 214, a first pressure transmitter;
22. a two-stage inlet;
221. a second shut-off valve 222, a second bypass valve 223, a second vane actuator 224, a second pressure transmitter;
23. a second-stage outlet;
231. a platinum thermal resistor;
24. a high-speed shaft;
241. a rotation speed monitor 242, a temperature monitor 243, a vibration monitor 244, and a displacement monitor;
3. a heat conduction pipe;
4. and (3) regulating the valve.
Detailed Description
The utility model will be further described with reference to the following examples.
Example 1.
As shown in fig. 1, a two-stage expander regulation control system comprises a PCL controller 1, wherein the PCL controller 1 is electrically connected with an expander 2, a first-stage inlet 21, a second-stage inlet 22, a second-stage outlet 23 and a high-speed shaft 24 are arranged on the expander 2, the first-stage inlet 21 is connected to the second-stage inlet 22 through a heat-conducting pipe 3, a regulating valve 4 is arranged at the interface of the first-stage inlet 21 and the heat-conducting pipe 3, and an expander performance control module 11, an expander enthalpy-supplementing control module 12, an expander overspeed protection control module 13 and an expander running state monitoring control module 14 are arranged in the PCL controller 1;
the expander performance control module 11 is electrically connected to the first-stage inlet 21 and the second-stage inlet 22, the expander enthalpy compensation control module 12 is electrically connected to the second-stage outlet 23 and the regulating valve 4, and the expander running state monitoring control module 14 and the expander overspeed protection control module 13 are electrically connected to the first-stage inlet 21, the second-stage inlet 22 and the high-speed shaft 24.
The PCL controller 1 is mainly composed of the following four control modules, namely: the system comprises an expander performance control module 11, an expander enthalpy compensation control module 12, an expander overspeed protection control module 13 and an expander running state monitoring control module 14.
As shown in fig. 2, the performance control module 11 of the expander is connected to the first-stage inlet 21 and the second-stage inlet 22, and the opening degree of the guide vanes of the first-stage inlet 21 and the second-stage inlet 22 is controlled by pressure transmission of the first-stage inlet 21 and the second-stage inlet 22, so that the performance of the expander 2 is ensured to be good.
As shown in fig. 3, the expander enthalpy-compensating control module 12 sends out a resistance signal through the second-stage outlet 23, and enters the expander enthalpy-compensating control module 12 to perform operation, and compares the resistance signal with a set value, and then determines the opening of the regulating valve 4 to regulate the amount of the enthalpy-compensating air.
As shown in fig. 4, the overspeed protection control module 13 of the expander performs voting comparison between the rotational speed signal transmitted from the high-speed shaft 24 and a set value, and controls the cutting and bypass of the first-stage inlet 21 and the second-stage inlet 22, thereby ensuring safety.
As shown in fig. 5, the expander operation state monitoring control module 14 controls the cutting and bypass of the first-stage inlet 21 and the second-stage inlet 22 by comparing the monitoring signals of vibration, displacement and rotation speed transmitted from the high-speed shaft 24 with the set values, thereby ensuring the safety.
As shown in fig. 2, a first cut-off valve 211, a first bypass valve 212, a first guide vane actuator 213 and a first pressure transmitter 214 are disposed on the first inlet 21, a second cut-off valve 221, a second bypass valve 222, a second guide vane actuator 223 and a second pressure transmitter 224 are disposed on the second inlet 22, and the expander performance control module 11 is electrically connected to the first guide vane actuator 213, the first pressure transmitter 214, the second guide vane actuator 223 and the second pressure transmitter 224, respectively.
As shown in fig. 1-5, the expander 2 performs safety protection on equipment by monitoring two stages of performance and running state of the expander 1 through the PCL controller 1, in order to prevent excessive liquid and even icing caused by too low total outlet temperature of the expander 2, the first cut-off valve 211 of the first inlet 21 of the expander 2 is used for leading hot air to the second inlet 22 of the expander 2 through the heat conducting pipe 3 to ensure the enthalpy value of the second inlet 22, the first pressure transmitter 214 and the second pressure transmitter 224 send 4-20mA signals to enter the PCL controller 1 for operation, the first guide vane executor 213 and the second guide vane executor 223 regulate the first guide vane IGV-74051a and the second guide vane IGV-74053A of the expander 2, when abnormal conditions occur in the expander 2, the PCL controller 1 sends a command to enable the first cut-off valve 211 and the second cut-off valve 221 to be quickly closed, the first bypass valve 212 and the second bypass valve 222 to be quickly opened, the equipment is safe, and the platinum resistor TE-74054a ensures that the signals enter the PCL controller 100 for operation, and then the rotation speed of the PCL controller 100 is monitored for entering the operation, and the rotation speed of the expander 2 is controlled by the operation controller 1.
As shown in FIG. 2, the first pressure transmitter 214 is installed at the first section inlet 21, the second pressure transmitter 224 is installed at the second section inlet 22, the first pressure transmitter 214PT-74051A and the second pressure transmitter 224PT-74053A send 4-20mA signals to the expander performance control module 11 on the PCL controller 1 for operation, the operation result is compared with an expander performance curve model, PID operation is carried out on the result, after the opening degree of the inlet guide vanes of each section is determined, 4-20mA signals are sent to the first inlet guide vane actuator and the second inlet guide vane actuator installed on the first section inlet 21 and the second section inlet 22, and the inlet guide vanes IGV-74051A and IGV-74053A of each section of the expander 2 are regulated to ensure the good performance of the expander 2.
As shown in fig. 3, the second-stage outlet 23 is provided with a platinum thermal resistor 231, and the expander enthalpy-compensating control module 12 is electrically connected to the platinum thermal resistor 231 and the regulating valve 4, respectively.
In order to prevent excessive liquid and even icing caused by too low total outlet temperature of the expander 2, hot air is led to the second-stage inlet 22 of the expander 2 from the first cut-off valve 211 of the first-stage inlet 21 of the expander 2 to ensure the enthalpy value of the second-stage inlet 22, a Pt100 signal is sent by the platinum thermal resistor 231TE-74054A of the second-stage outlet 23 to enter the expander enthalpy-supplementing control module 12 on the PCL controller 1 for operation, the comparison is carried out with a set value, the opening of the regulating valve 4 is determined after the comparison, and the result is sent to the regulating valve 4TV-74054A actuating mechanism through a 4-20mA signal to regulate the enthalpy-supplementing amount.
As shown in fig. 4, the expander overspeed protection control module 13 is provided with a voter 131, the high-speed shaft 24 is provided with a plurality of rotation speed monitors 241, the voter 131 is electrically connected with the rotation speed monitors 241, and the expander overspeed protection control module 13 is electrically connected with the voter 131, the first cut-off valve 211, the first bypass valve 212, the second cut-off valve 221 and the second bypass valve 222, respectively.
In this embodiment, a trisection rotation speed monitor 241 is adopted, signals are sent from three rotation speed monitors 241SE-74151AA, SE-74151AB and SE-74151AC on the high speed shaft 24 of the expander 2 to enter, a trisection voter 131 on the overspeed protection control module 13 of the expander is adopted, if the rotation speed is too high after the comparison with a set value, the overspeed protection control module 13 of the expander sends a stop instruction, the first cut-off valve 211 and the second cut-off valve 221 of each section of inlet are rapidly closed, the first bypass valve 212 and the second bypass valve 222 are rapidly opened, and the equipment safety is ensured.
The number of rotation speed monitors 241 is the same as the number of votes by the voter 131.
The number of the rotation speed monitors 241 is the same as that of the voters 131, so that voting judgment is realized, and the rotation speed measurement of the rotation speed monitors 241 is prevented from being inaccurate.
As shown in fig. 5, the expander operation state monitoring control module 14 is electrically connected to the first shut-off valve 211, the first bypass valve 212, the second shut-off valve 221, the second bypass valve 222, and the high speed shaft 24, respectively.
Also provided on the high speed shaft 24 are a temperature monitor 242, a vibration monitor 243 and a displacement monitor 244, the temperature monitor 242, the vibration monitor 243 and the displacement monitor 244 being electrically connected to the expander operating condition monitoring control module 14.
The temperature monitor 242, the vibration monitor 243 and the displacement monitor 244 on the high-speed shaft 24 are used for monitoring the temperature, vibration, displacement and rotation speed of each shaft and bearing of the unit, signals are sent to the expander running state monitoring control module 14 to be compared with set values, if the actual values are too high, a stop instruction is sent, the first cut-off valve 211 and the second cut-off valve 221 of each inlet are rapidly closed, the first bypass valve 212 and the second bypass valve 222 are rapidly opened, and the equipment safety is ensured.
As shown in fig. 1 to 5, the intersection of the heat conduction pipe 3 and the one-stage inlet 21 is located on the side of the first shut-off valve 211 near the one-stage inlet 21.
The heat conducting pipe 3 is installed between the first-stage inlet 21 and the second-stage inlet 22 and before the cut-off valve of the first-stage inlet 21, so that the heat conducting pipe 3 cannot supplement enthalpy to the second-stage inlet 22 when equipment failure occurs, and the total outlet temperature of the expander 2 is prevented from being excessively low.
The performance curve model of the expander 2 in the utility model is preset in the expander performance control module 11, and is compared with the calculated data, and the preset values described in the expander enthalpy compensation control module 12, the expander overspeed protection control module 13 and the expander running state monitoring control module 14 are all standard values preset in the module.
According to the utility model, the PCL controller 1 is electrically connected with the expander 2, and the guide vane opening of the expander 2, the valve opening of the regulating valve 4, the cut-off valve and the bypass valve are regulated, so that the performance regulation of the expander 2, the enthalpy compensation regulation of the two-stage inlet 22, overspeed protection control and mechanical operation state monitoring control are realized, the operation safety of the expander 2 is ensured from the two stages of the performance and state monitoring control of the expander 2, the equipment is prevented from being failed, and the regulation is monitored in real time.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the scope of the present utility model, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solution of the present utility model without departing from the spirit and scope of the technical solution of the present utility model.
Claims (8)
1. A two-stage expander regulation control system is characterized in that: the device comprises a PCL controller, wherein the PCL controller is electrically connected with an expander, a first-stage inlet, a second-stage outlet and a high-speed shaft are arranged on the expander, the first-stage inlet is connected to the second-stage inlet through a heat conducting pipe, an adjusting valve is arranged at the interface of the first-stage inlet and the heat conducting pipe, and an expander performance control module, an expander enthalpy compensation control module, an expander overspeed protection control module and an expander running state monitoring control module are arranged in the PCL controller;
the expander performance control module is electrically connected to the first-stage inlet and the second-stage inlet respectively, the expander enthalpy compensation control module is electrically connected to the second-stage outlet and the regulating valve respectively, and the expander running state monitoring control module and the expander overspeed protection control module are electrically connected to the first-stage inlet, the second-stage inlet and the high-speed shaft respectively.
2. The two-stage expander modulation control system of claim 1 wherein: the first section of inlet is provided with a first cut-off valve, a first bypass valve, a first guide vane actuator and a first pressure transmitter, the second section of inlet is provided with a second cut-off valve, a second bypass valve, a second guide vane actuator and a second pressure transmitter, and the expander performance control module is respectively and electrically connected with the first guide vane actuator, the first pressure transmitter, the second guide vane actuator and the second pressure transmitter.
3. The two-stage expander modulation control system of claim 1 wherein: and the second-section outlet is provided with a platinum thermal resistor, and the enthalpy-supplementing control module of the expander is respectively and electrically connected with the platinum thermal resistor and the regulating valve.
4. The two-stage expander modulation control system of claim 2 wherein: the overspeed protection control module of the expansion machine is provided with a voter, a plurality of rotation speed monitors are arranged on the high-speed shaft, the voter is electrically connected with the rotation speed monitors, and the overspeed protection control module of the expansion machine is respectively and electrically connected with the voter, the first cut-off valve, the first bypass valve, the second cut-off valve and the second bypass valve.
5. The two-stage expander modulation control system of claim 4 wherein: the number of the rotating speed monitors is the same as the voting number of the voters.
6. The two-stage expander modulation control system of claim 4 wherein: the expander running state monitoring control module is electrically connected with the first cut-off valve, the first bypass valve, the second cut-off valve, the second bypass valve and the high-speed shaft respectively.
7. The two-stage expander modulation control system of claim 4 wherein: the high-speed shaft is further provided with a temperature monitor, a vibration monitor and a displacement monitor, wherein the temperature monitor, the vibration monitor and the displacement monitor are electrically connected to the monitoring control module of the running state of the expander.
8. The two-stage expander modulation control system of claim 6 wherein: the intersection of the heat conduction pipe and the section of inlet is positioned on one side of the first shut-off valve, which is close to the section of inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223352195.5U CN219085312U (en) | 2022-12-12 | 2022-12-12 | Two-stage expander regulation control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223352195.5U CN219085312U (en) | 2022-12-12 | 2022-12-12 | Two-stage expander regulation control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219085312U true CN219085312U (en) | 2023-05-26 |
Family
ID=86406541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223352195.5U Active CN219085312U (en) | 2022-12-12 | 2022-12-12 | Two-stage expander regulation control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219085312U (en) |
-
2022
- 2022-12-12 CN CN202223352195.5U patent/CN219085312U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2730766B1 (en) | Heat exchange arrangement for a gas turbine | |
| CN111350595A (en) | Control system of shale gas supply device at wellhead of micro gas turbine generator | |
| CN110529417B (en) | Automatic online cutting machine operation method of multi-machine parallel centrifugal compressor unit | |
| US20180156227A1 (en) | System and method for turbomachinery rotor and blade prognostics and diagnostics | |
| CN219085312U (en) | Two-stage expander regulation control system | |
| CN110821759B (en) | Hydraulic variable propeller fault rapid positioning and safe shutdown method | |
| CN111521403A (en) | Automatic load regulation control method and system for cold and hot shock test of diesel engine | |
| CN103104453B (en) | The controlling method of cooling system and device | |
| JP4528693B2 (en) | Steam turbine power plant and control method thereof | |
| CN102425558A (en) | Monitoring device for combustion drive compression unit | |
| CN202326341U (en) | Combustion drive compressor unit monitoring device | |
| US5960624A (en) | Process for regulating gas pressures of catalyst regenerator expansion turbines | |
| CN101539136B (en) | Automatic variable-frequency regulating device for compressor of electric refrigerating machine | |
| CN116241343B (en) | System for optimizing operation control and adjusting security of steam turbine | |
| CN214468852U (en) | Control system of catalytic device smoke exhaust ventilator | |
| CN101737170B (en) | Aeroengine generating system | |
| CN221883048U (en) | Aeroengine camshaft state monitoring control system | |
| CN112360578B (en) | Self-adaptive closed circulation thermoelectric conversion system | |
| JP2021099042A (en) | Compressor system | |
| CN216922661U (en) | Control device for inlet rotatable guide vanes of gas compressor | |
| CN110111920B (en) | Intelligent adjusting device for ensuring stable leakage temperature of nuclear power station | |
| CN112594186B (en) | Intelligent control system and control method for oil-free screw compressor | |
| JPH08296405A (en) | Thermal stress decreasing operation method for steam turbine in uniaxial combined cycle | |
| CN118481760A (en) | Steam inlet valve control system and control method for steam turbine | |
| CN212774434U (en) | Protection device for emergency security and overspeed limitation of thermal turbine unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |