CN212054829U - High-pressure fire-resistant oil electrohydraulic control system of main steam pipeline quick closing valve of steam turbine - Google Patents
High-pressure fire-resistant oil electrohydraulic control system of main steam pipeline quick closing valve of steam turbine Download PDFInfo
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- CN212054829U CN212054829U CN202020668904.2U CN202020668904U CN212054829U CN 212054829 U CN212054829 U CN 212054829U CN 202020668904 U CN202020668904 U CN 202020668904U CN 212054829 U CN212054829 U CN 212054829U
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- 230000009970 fire resistant effect Effects 0.000 title claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims 2
- 230000005611 electricity Effects 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000004146 energy storage Methods 0.000 abstract 2
- 239000003921 oil Substances 0.000 description 68
- 239000010720 hydraulic oil Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
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Abstract
The utility model provides a high pressure fire resistant oil electricity liquid control system of steam turbine owner steam line fast valve of closing, it has solved the fast valve of closing and has not had independent pressurize function scheduling problem, it includes fast control module and the servomotor module of closing, the servomotor module has the single-action pneumatic cylinder of being connected with the fast valve of closing, be provided with the energy storage ware module on fast control module's the oil pipe that advances, fast control module has main electromagnetic control valve, main electromagnetic control valve is through advancing between oil pipe way and the servomotor module and being connected with the closed valve return circuit, open valve return circuit and pressurize return circuit, the energy storage ware module, each part and return oil pipe connection in fast control module and the servomotor module, be provided with the manual valve of pressurize of being connected with main electromagnetic control valve on the pressurize return circuit, be connected with pressurize pilot operated directional control valve on the manual valve, pressurize pilot operated directional control valve and open the valve return circuit and be connected. The utility model has the advantages of independent pressure maintaining, stable operation and the like.
Description
Technical Field
The utility model belongs to the technical field of hydraulic control, concretely relates to high pressure fire resistant oil electricity liquid control system of steam turbine main steam pipeline fast valve of closing.
Background
The main steam pipeline quick closing valve of the steam turbine in the petrochemical industry is a quick closing valve added due to safety and environmental protection requirements, is in redundant arrangement with the main steam valve quick closing valve of the steam turbine with quick closing capability, and is a new requirement of the steam turbine industry. At present, in the petrochemical industry, a steam turbine quick closing valve is an electro-hydraulic control system using hydraulic lubricating oil or high-pressure fire-resistant oil as a medium to complete the task. In order to rapidly close a main valve quick closing valve of a steam turbine body in a critical situation, a quick closing control assembly with redundancy is generally adopted. However, the existing control system has higher requirements on the safety and reliability of the valve and the control system thereof, and the turbine main steam pipeline quick closing valve in the petrochemical industry with the worse field environment cannot be completely applicable. The existing hydraulic control system does not have the function of independent pressure maintaining for the quick closing valve, once a hydraulic pump station has a problem, the quick closing valve is immediately closed, and the turbine is shut down to cause a large amount of loss. Besides, the electromagnetic valve has a jamming fault and also has a self-reversing fault, and the existing hydraulic control system cannot effectively prevent the jamming fault.
In order to solve the defects of the prior art, people have long searched for and put forward various solutions. For example, the chinese patent document discloses a redundant remote shutdown control circuit [201520120303.7] for a main steam circuit of a steam turbine, which includes three remote-controlled branch hydraulic circuits with the same redundant configuration of components, each branch hydraulic circuit is composed of an electromagnetic directional valve and a hydraulic directional valve, a first oil outlet of the electromagnetic directional valve is communicated with the hydraulic directional valve, a second oil outlet of the electromagnetic directional valve is respectively communicated with an oil return pipeline, an oil outlet of the hydraulic directional valve is respectively communicated with a two-way cartridge valve, a first oil outlet of the two-way cartridge valve is communicated with the oil return pipeline, and a second oil outlet of the two-way cartridge valve is connected with a control oil circuit of the quick shutdown valve.
The problem of solenoid valve self-commutation has been solved to a certain extent to above-mentioned scheme, but this scheme still has a lot of insufficiencies, for example does not have independent pressurize, can't maintain the fast valve open mode when the hydraulic pump trouble etc. problem.
Disclosure of Invention
The utility model aims at the above-mentioned problem, provide a reasonable in design, the high pressure fire resistant oil electricity liquid control system of the turbine main steam line fast valve that independently pressurize.
In order to achieve the above purpose, the utility model adopts the following technical proposal: the high-pressure fire-resistant electro-hydraulic control system of the turbine main steam pipeline quick closing valve comprises a quick closing control module and a servomotor module, wherein the servomotor module is provided with a single-action hydraulic cylinder connected with the quick closing valve, an energy accumulator module is arranged on an oil inlet pipeline of the quick closing control module, the quick closing control module is provided with a main electromagnetic control valve arranged on the oil inlet pipeline, the main electromagnetic control valve is connected with the servomotor module through the oil inlet pipeline in parallel with a valve closing loop, a valve opening loop, a pressure maintaining loop and the energy accumulator module, each component in the quick-closing control module and the oil motor module is connected with an oil return pipeline, a pressure maintaining manual valve connected with the main electromagnetic control valve is arranged on the pressure maintaining loop, a pressure maintaining hydraulic control reversing valve is connected to the pressure maintaining manual valve and connected with a valve opening loop, the valve opening loop and the pressure maintaining loop are connected with an oil discharge port of the single-action hydraulic cylinder, and the valve closing loop is connected with an oil injection port of the single-action hydraulic cylinder. The built-in pressure maintaining loop ensures that the quick closing valve can continuously maintain the opening state in a short time when the hydraulic pump of the control and execution mechanism breaks down and cannot maintain the normal operating pressure of a working medium, and can greatly reduce the loss caused by the shutdown of the steam turbine.
In the high-pressure fire-resistant electro-hydraulic control system of the steam turbine main steam pipeline quick-closing valve, the valve opening loop comprises a plurality of parallel valve opening branches, each valve opening branch is provided with a valve opening electromagnetic control valve and a valve opening hydraulic control reversing valve which are sequentially connected in series, an oil outlet of the valve opening electromagnetic control valve in each valve opening branch is connected with a hydraulic control interface of the valve opening hydraulic control reversing valve in another different valve opening branch, and the valve opening loop is provided with a valve opening manual valve which is connected with the valve opening branch in parallel. The valve opening loop is provided with a plurality of mutually controlled valve opening branches, so that the situation that the quick-closing valve control logic is interlocked to stop and cannot continue to work normally when the oil pressure of the valve opening branches is low is avoided.
In the high-pressure fire-resistant electro-hydraulic control system of the turbine main steam pipeline quick-closing valve, the valve opening branch, the valve opening manual valve and the single-acting hydraulic cylinder are connected through a plurality of two-way cartridge valves which are connected in parallel. The two-way cartridge valve controls the pressure from the valve opening loop to the single-acting hydraulic cylinder, so that the stability of oil inlet is ensured and the direction of oil inlet is controlled.
In the high-pressure fire-resistant electro-hydraulic control system of the turbine main steam pipeline quick-closing valve, the hydraulic control interface of the pressure maintaining hydraulic control reversing valve is connected with the valve opening branch and the valve opening manual valve. The pressure maintaining hydraulic control reversing valve is controlled by the valve opening branch and the valve opening manual valve, and when the valve opening loop is relieved due to faults, the pressure maintaining hydraulic control reversing valve is opened to maintain the opening pressure of the single-action hydraulic cylinder.
In the high-pressure fire-resistant electro-hydraulic control system of the steam turbine main steam pipeline quick closing valve, the valve closing electromagnetic control valve is connected in series on the valve closing loop. The valve closing electromagnetic control valve controls the closing of the single-acting hydraulic cylinder.
In the high-pressure fire-resistant electro-hydraulic control system of the turbine main steam pipeline quick closing valve, the valve opening loop and the pressure maintaining loop are respectively externally connected with an overflow valve. The overflow valve prevents the excessive oil pressure inside the valve opening loop and the pressure maintaining loop from releasing pressure emergently.
In the high-pressure fire-resistant oil electro-hydraulic control system of the turbine main steam pipeline quick closing valve, the hydraulic rod of the single-action hydraulic cylinder is sleeved with the spring combination, and the outer side of the hydraulic rod is provided with the position switch. The spring combination provides power for the single-action hydraulic cylinder, and the hydraulic rod is guaranteed to return automatically when no hydraulic pressure exists.
In the high-pressure fire-resistant oil electro-hydraulic control system of the turbine main steam pipeline quick-closing valve, the energy accumulator module comprises a plurality of energy accumulators externally connected to the oil inlet pipeline, pressure gauges are respectively arranged between the energy accumulators and the oil inlet pipeline, and a plurality of stop valves are connected in series to the oil inlet pipeline and the oil return pipeline in the energy accumulator module. The accumulator module can continuously maintain the oil pressure of the system for a period of time under the condition of no external oil source, and provides extra time for rush repair of the hydraulic pump.
In the high-pressure fire-resistant oil electro-hydraulic control system of the turbine main steam pipeline quick closing valve, the oil inlets of the oil inlet pipeline, the valve closing loop, the valve opening loop and the pressure maintaining loop are provided with the one-way valves, and the oil inlet pipeline and the oil return pipeline are connected with the throttle valves in series. The check valve controls the one-way flow of the hydraulic oil and is matched with the throttle valve to ensure the stable flow of the hydraulic oil.
In the high-pressure fire-resistant electro-hydraulic control system of the main steam pipeline quick closing valve of the steam turbine, a heat tracing/cooling mechanism is communicated among the energy accumulator module, the quick closing control module and the servomotor module. The heat tracing/cooling mechanism can receive cooling water when the temperature of the system is too high, and can pass hot water or steam when the temperature of the system is too low to maintain the internal temperature of each module to be stable.
Compared with the prior art, the utility model has the advantages of: the pressure maintaining loop with independent pressure maintaining function can maintain the opening state of the quick closing valve and avoid the shutdown of the steam turbine caused by the sudden closing of the quick closing valve; the energy accumulator module can continuously maintain the oil pressure of the system for a period of time under the condition of no external oil source, and provides extra time for rush repair of the hydraulic pump; the built-in heat tracing/cooling mechanism ensures the stable temperature in each module and prolongs the service life of the control system.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic structural view of an accumulator module of the present invention;
fig. 3 is a schematic structural diagram of the quick-closing control module of the present invention;
fig. 4 is a schematic structural diagram of the servomotor module of the present invention;
in the figure, an accumulator module 1, an accumulator 11, a pressure gauge 12, a stop valve 13, a quick-closing control module 2, a main electromagnetic control valve 21, a servomotor module 3, a quick-closing valve 31, a single-acting hydraulic cylinder 32, a hydraulic rod 33, a spring assembly 34, a position switch 35, an oil inlet pipeline 4, a one-way valve 41, a throttle valve 42, a valve closing circuit 5, a valve closing electromagnetic control valve 51, a valve opening circuit 6, a valve opening branch 61, a valve opening electromagnetic control valve 62, a valve opening pilot-operated directional valve 63, a valve opening manual valve 64, a two-way cartridge valve 65, an overflow valve 66, a pressure maintaining circuit 7, a pressure maintaining pilot-operated directional valve 71, a pressure maintaining pilot-operated directional valve 72, an oil return pipeline 8.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-4, the high-pressure fire-resistant electro-hydraulic control system of the turbine main steam pipeline quick-closing valve comprises a quick-closing control module 2 and a servomotor module 3, wherein the servomotor module 3 is provided with a single-acting hydraulic cylinder 32 connected with the quick-closing valve 31, an energy accumulator module 1 is arranged on an oil inlet pipeline 4 of the quick-closing control module 2, the quick-closing control module 2 is provided with a main electromagnetic control valve 21 arranged on the oil inlet pipeline 4, the main electromagnetic control valve 21 is connected with a valve closing loop 5, a valve opening loop 6 and a pressure maintaining loop 7 through the oil inlet pipeline 4 and the servomotor module 3, each component in the energy accumulator module 1, the quick-closing control module 2 and the servomotor module 3 is connected with an oil return pipeline 8, the pressure maintaining loop 7 is provided with a pressure maintaining manual valve 71 connected with the main electromagnetic control valve 21, the manual pressure maintaining valve 71 is connected with a hydraulic control reversing valve 72 in parallel, the pressure maintaining reversing valve 72 is, the valve opening circuit 6 and the pressure maintaining circuit 7 are connected to an oil drain port of the single-acting hydraulic cylinder 32, and the valve closing circuit 5 is connected to an oil filling port of the single-acting hydraulic cylinder 32. When the quick closing valve 31 is opened, the main electromagnetic control valve 21 opens the oil inlet line 4 and the valve opening circuit 6 is started. Hydraulic oil is injected into an oil discharge port of the single-acting hydraulic cylinder 32 to drive a hydraulic rod 33 of the single-acting hydraulic cylinder 32 to retract and maintain hydraulic pressure by the pressure maintaining loop 7; when the quick closing valve 31 is closed, the valve closing circuit 5 is started, the oil return lines 8 of the valve opening circuit 6 and the pressure maintaining circuit 7 are decompressed, and the hydraulic rod 33 of the single-acting hydraulic cylinder 32 extends out to close the quick closing valve 31.
Specifically, the valve-opening circuit 6 includes a plurality of parallel valve-opening branches 61, the valve-opening branch 61 has a valve-opening electromagnetic control valve 62 and a valve-opening pilot-controlled directional control valve 63 connected in series in sequence, an oil outlet of the valve-opening electromagnetic control valve 62 in the valve-opening branch 61 is connected with a pilot-controlled interface of the valve-opening pilot-controlled directional control valve 63 in another different valve-opening branch 61, and a valve-opening manual valve 64 connected in parallel with the valve-opening branch 61 is disposed on the valve-opening circuit 6. The valve-opening electromagnetic control valve 62 in the valve-opening branch 61 is opened by the control circuit, and the hydraulic oil flows into the valve-opening pilot-controlled directional control valve 63. Meanwhile, the valve-opening pilot-controlled directional control valve 63 is controlled by the valve-opening electromagnetic control valve 62 in the other valve-opening branch 61, forming a linkage mechanism.
The valve-opening branch 61 and the valve-opening manual valve 64 are connected to the single-acting hydraulic cylinder 32 via two-way cartridge valves 65 connected in parallel. The two-way cartridge valve 65 ensures that hydraulic oil output by the valve-opening branch 61 and the valve-opening manual valve 64 flows in one direction. Meanwhile, the flow can be controlled, and the oil inlet stability of the single-action hydraulic cylinder 32 is ensured.
Further, the pilot-controlled interface of the pressure-maintaining pilot-controlled directional control valve 72 is connected with the valve-opening branch 61 and the valve-opening manual valve 64. The pressure-maintaining pilot-controlled directional control valve 72 is opened when the valve-opening branch 61 fails, and maintains the quick-closing valve 31 connected to the single-acting hydraulic cylinder 32 open.
Further, a valve-closing electromagnetic control valve 51 is connected in series to the valve-closing circuit 5. The valve-closing electromagnetic control valve 51 of the valve-closing circuit 5 controls the cylinder oil inlet of the single-acting hydraulic cylinder 32 and provides closing power for the quick-closing valve 31.
In addition, relief valves 66 are externally connected to the valve opening circuit 6 and the pressure holding circuit 7, respectively. When the quick closing valve 31 is completely opened and enters normal operation, a small amount of oil enters the oil return pipeline 8 through the overflow valve 66, and good fluidity of the whole system is ensured.
Meanwhile, a spring assembly 34 is sleeved on a hydraulic rod 33 of the single-acting hydraulic cylinder 32, and a position switch 35 is arranged on the outer side of the spring assembly. The quick-closing valve 31 can be kept open as long as the force of the system on the hydraulic rod 33 of the single-acting hydraulic cylinder 32 is greater than the force of the spring combination 34.
Visibly, the energy accumulator module 1 comprises a plurality of energy accumulators 11 externally connected to the oil inlet pipeline 4, pressure gauges 12 are respectively arranged between the energy accumulators 11 and the oil inlet pipeline 4, and a plurality of stop valves 13 are connected in series on the oil inlet pipeline 4 and the oil return pipeline 8 in the energy accumulator module 1. When the system pressure increases instantaneously, the energy accumulator module 1 can absorb the energy of the part to ensure that the pressure of the whole system is normal. When the system is out of order and oil cannot be supplied, the accumulator 11 can continuously maintain the system oil pressure for a period of time.
Obviously, the oil inlets of the oil inlet pipeline 4, the valve closing loop 5, the valve opening loop 6 and the pressure maintaining loop 7 are provided with one-way valves 41, and the oil inlet pipeline 4 and the oil return pipeline 8 are connected in series with a plurality of throttle valves 42. Oil is filled into the oil inlet pipeline 4, the valve closing loop 5, the valve opening loop 6 or the pressure maintaining loop 7 through the one-way valve 41, the pressure of hydraulic oil is ensured, and the flow of the hydraulic oil is controlled by matching with the throttle valve 42.
Obviously, a heat tracing/cooling mechanism 9 is communicated among the energy accumulator module 1, the speed closing control module 2 and the servomotor module 3. The heat tracing/cooling mechanism 9 can receive cooling water when the temperature of the system is too high, and can pass hot water or steam when the temperature of the system is too low, so that the internal temperature is kept stable, and the quality reduction of oil products caused by the temperature change of hydraulic oil is avoided.
In summary, the principle of the present embodiment is: the closing and opening of the quick-closing valve 31 connected to the single-acting hydraulic cylinder 32 are controlled by the valve-closing circuit 5, the valve-opening circuit 6, and the pressure-maintaining circuit 7. Meanwhile, the pressure maintaining circuit 7 comprises a pressure maintaining manual valve 71 and a pressure maintaining hydraulic control reversing valve 72 which are connected in parallel, and when a hydraulic pump of the system fails, the quick closing valve 31 is kept open.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although terms such as the accumulator module 1, the accumulator 11, the pressure gauge 12, the stop valve 13, the quick-closing control module 2, the main electromagnetic control valve 21, the servomotor module 3, the quick-closing valve 31, the single-acting hydraulic cylinder 32, the hydraulic rod 33, the spring assembly 34, the position switch 35, the oil feed line 4, the check valve 41, the throttle valve 42, the valve-closing circuit 5, the valve-closing electromagnetic control valve 51, the valve-opening circuit 6, the valve-opening branch 61, the valve-opening electromagnetic control valve 62, the valve-opening pilot-operated directional valve 63, the valve-opening manual valve 64, the two-way pilot-operated valve cartridge 65, the relief valve 66, the pressure-holding circuit 7, the pressure-holding manual valve 71, the pressure-holding directional valve 72, the oil return line 8, the heat tracing/cooling mechanism 9, and. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
Claims (10)
1. A high-pressure fire-resistant electro-hydraulic control system of a turbine main steam pipeline quick-closing valve comprises a quick-closing control module (2) and a servomotor module (3), wherein the servomotor module (3) is provided with a single-action hydraulic cylinder (32) connected with the quick-closing valve (31), and is characterized in that an energy accumulator module (1) is arranged on an oil inlet pipeline (4) of the quick-closing control module (2), the quick-closing control module (2) is provided with a main electromagnetic control valve (21) arranged on the oil inlet pipeline (4), the main electromagnetic control valve (21) is connected with a valve closing loop (5), a valve opening loop (6) and a pressure maintaining loop (7) through the oil inlet pipeline (4) and the servomotor module (3), and all parts of the energy accumulator module (1), the quick-closing control module (2) and the servomotor module (3) are connected with an oil return pipeline (8), the hydraulic control system is characterized in that a pressure maintaining manual valve (71) connected with a main electromagnetic control valve (21) is arranged on the pressure maintaining loop (7), a pressure maintaining hydraulic control reversing valve (72) is connected to the pressure maintaining manual valve (71), the pressure maintaining hydraulic control reversing valve (72) is connected with a valve opening loop (6), the valve opening loop (6) and the pressure maintaining loop (7) are connected with an oil discharge port of a single-action hydraulic cylinder (32), and a valve closing loop (5) is connected with an oil filling port of the single-action hydraulic cylinder (32).
2. The high-pressure fire-resistant electro-hydraulic control system of the turbine main steam pipeline quick-closing valve according to claim 1, characterized in that the valve-opening circuit (6) comprises a plurality of valve-opening branches (61) connected in parallel, the valve-opening branch (61) is provided with a valve-opening electromagnetic control valve (62) and a valve-opening pilot-controlled reversing valve (63) connected in series in sequence, an oil outlet of the valve-opening electromagnetic control valve (62) in the valve-opening branch (61) is connected with a pilot-controlled interface of the valve-opening pilot-controlled reversing valve (63) in another different valve-opening branch (61), and the valve-opening circuit (6) is provided with a valve-opening manual valve (64) connected in parallel with the valve-opening branch (61).
3. The high-pressure fire-resistant electro-hydraulic control system of the turbine main steam pipeline quick closing valve as claimed in claim 2, characterized in that the valve opening branch (61) and the valve opening manual valve (64) are connected with the single-acting hydraulic cylinder (32) through a plurality of two-way cartridge valves (65) connected in parallel.
4. The high-pressure fuel-resistant electro-hydraulic control system of the turbine main steam pipeline quick closing valve according to claim 2 or 3, characterized in that a hydraulic control interface of the pressure maintaining hydraulic control reversing valve (72) is connected with the valve opening branch (61) and the valve opening manual valve (64).
5. The high-pressure fire-resistant electro-hydraulic control system of the main steam pipeline quick closing valve of the steam turbine as claimed in claim 1, characterized in that a valve-closing electromagnetic control valve (51) is connected in series on the valve-closing loop (5).
6. The high-pressure fuel-resistant electro-hydraulic control system of the turbine main steam pipeline quick closing valve according to claim 1, characterized in that the valve opening loop (6) and the pressure maintaining loop (7) are respectively externally connected with an overflow valve (66).
7. The high-pressure fire-resistant oil electro-hydraulic control system of the main steam pipeline quick closing valve of the steam turbine as claimed in claim 1, characterized in that a spring assembly (34) is sleeved on a hydraulic rod (33) of the single-acting hydraulic cylinder (32), and a position switch (35) is arranged on the outer side of the hydraulic rod.
8. The high-pressure fire-resistant electro-hydraulic control system of the main steam pipeline quick closing valve of the steam turbine as claimed in claim 1, wherein the energy accumulator module (1) comprises a plurality of energy accumulators (11) externally connected to the oil inlet pipeline (4), a pressure gauge (12) is respectively arranged between each energy accumulator (11) and the oil inlet pipeline (4), and a plurality of stop valves (13) are connected in series to the oil inlet pipeline (4) and the oil return pipeline (8) in the energy accumulator module (1).
9. The high-pressure fire-resistant oil electro-hydraulic control system of the main steam pipeline quick closing valve of the steam turbine according to claim 1, characterized in that oil inlets of the oil inlet pipeline (4), the valve closing loop (5), the valve opening loop (6) and the pressure maintaining loop (7) are provided with one-way valves (41), and the oil inlet pipeline (4) and the oil return pipeline (8) are connected with a plurality of throttle valves (42) in series.
10. The high-pressure fire-resistant electro-hydraulic control system of the main steam pipeline quick closing valve of the steam turbine as claimed in claim 1, wherein a heat tracing/cooling mechanism (9) is communicated among the energy accumulator module (1), the quick closing control module (2) and the servomotor module (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020668904.2U CN212054829U (en) | 2020-04-27 | 2020-04-27 | High-pressure fire-resistant oil electrohydraulic control system of main steam pipeline quick closing valve of steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020668904.2U CN212054829U (en) | 2020-04-27 | 2020-04-27 | High-pressure fire-resistant oil electrohydraulic control system of main steam pipeline quick closing valve of steam turbine |
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| CN212054829U true CN212054829U (en) | 2020-12-01 |
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| CN202020668904.2U Active CN212054829U (en) | 2020-04-27 | 2020-04-27 | High-pressure fire-resistant oil electrohydraulic control system of main steam pipeline quick closing valve of steam turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116201739A (en) * | 2023-01-10 | 2023-06-02 | 华能安源发电有限责任公司 | Misoperation-preventing tripping control device and system for steam feed pump |
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2020
- 2020-04-27 CN CN202020668904.2U patent/CN212054829U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116201739A (en) * | 2023-01-10 | 2023-06-02 | 华能安源发电有限责任公司 | Misoperation-preventing tripping control device and system for steam feed pump |
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