CN113374540A - Integrated quick-closing regulating valve based on self-capacitance type electro-hydraulic actuator - Google Patents
Integrated quick-closing regulating valve based on self-capacitance type electro-hydraulic actuator Download PDFInfo
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- CN113374540A CN113374540A CN202110637613.6A CN202110637613A CN113374540A CN 113374540 A CN113374540 A CN 113374540A CN 202110637613 A CN202110637613 A CN 202110637613A CN 113374540 A CN113374540 A CN 113374540A
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 43
- 239000003921 oil Substances 0.000 description 32
- 238000010586 diagram Methods 0.000 description 11
- 239000012208 gear oil Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 2
- 230000001739 rebound effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010626 work up procedure Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/20—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted
- F01D17/22—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical
- F01D17/24—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical electrical
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/20—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted
- F01D17/22—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical
- F01D17/26—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical fluid, e.g. hydraulic
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
The invention relates to an integrated quick-closing regulating valve based on a self-capacitance type electro-hydraulic actuator, which comprises a steam regulating valve, a spring, the self-capacitance type electro-hydraulic actuator and a two-position two-way control valve, wherein the steam regulating valve is driven by the self-capacitance type electro-hydraulic actuator; the spring is sleeved outside the driving rod of the self-contained electro-hydraulic actuator, and two ends of the spring respectively support the self-contained electro-hydraulic actuator and a valve seat valve body of the steam regulating valve; two oil ports of the two-position two-way control valve are respectively communicated with an upper side oil cylinder and a lower side oil cylinder of the self-capacitance type electro-hydraulic actuator. One valve replaces the combination of two valves, so that the occupied space size is reduced, and the cost expenditure is reduced; the steam flow adjusting function can be realized; but also can respectively or simultaneously receive mechanical/hydraulic/electric signals and implement a quick-closing protection function; and the pressure loss of the system valve is reduced.
Description
Technical Field
The invention relates to a steam turbine adjusting and security technology, in particular to an integrated quick-closing adjusting valve based on a self-capacitance type electro-hydraulic actuator.
Background
The new steam entering the turbine generally passes through two valves, namely a quick-closing valve (also called a main valve) and a regulating valve. Quick-closing valves generally implement on-off control: when the steam turbine operates, the quick closing valve is in a fully open state, so that new steam can smoothly pass through the quick closing valve; when the turbine is in emergency states such as overspeed, the quick closing valve can receive signals and implement quick closing action so as to realize the safety protection function of the turbine. The steam regulating valve regulates the flow of steam entering the steam turbine through the control of the opening degree of the valve.
The self-contained electro-hydraulic actuator is an electro-hydraulic actuator integrating an oil supply device and an actuator. Such as REXA, JODAN, ROTORK electro-hydraulic actuators, and domestic simulated related products. As shown in the structural schematic diagram of the self-capacitance electro-hydraulic actuator in figure 1,
the self-contained electro-hydraulic actuator 1 adopts double-side oil cylinders, the oil cylinders (101, 103) on the two sides are respectively connected with a gear oil pump 104 capable of running in a forward and reverse rotation mode, and a driving piston 102 pushes an actuating rod 105 to work up and down. The control of the actuator stroke is achieved by the gear oil pump 104 steering control. The self-contained electro-hydraulic actuator 1 has been gradually used as an actuator of a steam control valve of a small industrial steam turbine due to high structural integration and reliable performance.
The signals received by the quick-closing valve to perform the quick-closing operation generally include mechanical (flyweight), hydraulic (pulse oil pump pressure), and electrical (ETS switching value) signals. The time from full opening to full closing of the quick closing valve is generally required to be within 0.5 s. The existing self-capacitance electro-hydraulic actuator has the execution speed which is difficult to meet the requirement of quickly closing the valve and the quickly closing time, and can not meet the requirement of receiving the related quickly closing signal.
Because can not unite two into one the valve function, the conventionality gets into the steam turbine to new steam and sets up two steam valve, and the pressure loss of two valves is great on the one hand, influences the thermal efficiency, and two valves occupy more space dimensions simultaneously, and the investment is great moreover.
Disclosure of Invention
Aiming at the problems that new steam enters a steam turbine and uses two valves, namely a quick-closing valve and a regulating valve, an integrated quick-closing regulating valve based on a self-capacitance type electro-hydraulic actuator is provided, one valve replaces the original two valves, the steam flow can be regulated, and signals can be received and the quick-closing protection function can be executed.
The technical scheme of the invention is as follows: an integrated quick-closing regulating valve based on a self-capacitance type electro-hydraulic actuator comprises a steam regulating valve driven by the self-capacitance type electro-hydraulic actuator, a spring, the self-capacitance type electro-hydraulic actuator and a two-position two-way control valve; the spring is sleeved outside the driving rod of the self-contained electro-hydraulic actuator, and two ends of the spring respectively support the self-contained electro-hydraulic actuator and a valve seat valve body of the steam regulating valve; two oil ports of the two-position two-way control valve are respectively communicated with an upper side oil cylinder and a lower side oil cylinder of the self-capacitance type electro-hydraulic actuator.
Preferably, the two-position two-way control valve is in an open state, the two oil ports are not communicated, and the self-contained electro-hydraulic actuator outputs driving force to control the opening of the steam regulating valve under the condition of overcoming the elastic force of the spring so as to realize regulation; the two-position two-way control valve is in a closed state, the two oil ports are communicated with the two oil cylinders on the upper side and the lower side of the self-contained electro-hydraulic actuator, so that the oil cylinders on the upper side and the lower side lose pressure difference, and the valve is quickly closed under the action of spring force resilience; and realizing quick closing.
Preferably, the steam regulating valve comprises a valve head in a valve seat valve body, a valve seat valve body and a valve rod fixedly connected with the valve head; the valve rod of the steam regulating valve is connected with the actuating rod of the self-contained electro-hydraulic actuator to form a driving rod of the self-contained electro-hydraulic actuator, and the valve seat valve body is arranged at the upper end of the spring.
Preferably, the two-position two-way control valve can be rapidly closed under any one of mechanical force, electromagnetic force and oil pressure.
The invention has the beneficial effects that: the integrated quick-closing regulating valve based on the self-capacitance type electro-hydraulic actuator has the advantages that one valve replaces the combination of two valves, the occupied space size is reduced, and the cost expenditure is reduced; the steam flow adjusting function can be realized; but also can respectively or simultaneously receive mechanical/hydraulic/electric signals and implement a quick-closing protection function; and the pressure loss of the system valve is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a conventional self-contained electro-hydraulic actuator;
FIG. 2 is a schematic structural diagram of an integrated quick-closing regulating valve based on a self-contained electro-hydraulic actuator according to the invention;
FIG. 3 is a schematic diagram of the application of the integrated speed-closing control valve of the present invention to a mechanical speed-closing control valve in a steam turbine;
FIG. 4 is a schematic diagram of the present invention applied to a mechanical speed-closing control valve in a steam turbine;
FIG. 5 is a schematic diagram of the present invention in use in a mechanical/electromagnetic speed-closing control valve in a steam turbine;
FIG. 6 is a schematic diagram of a diaphragm quick-closing control valve of the present invention in use in a steam turbine;
FIG. 7 is a schematic view of the multi-function speed-closing control valve of the present invention in a steam turbine.
Reference numerals: 1. a self-contained electro-hydraulic actuator; 101. an upper side oil cylinder; 102. a piston; 103. a lower side oil cylinder; 104. a gear oil pump; 105. an actuating lever; 2. a spring; 3. a steam regulating valve; 301. a valve head; 302. a valve seat and a valve body; 303. a valve stem; 4. a two-position two-way control valve; 5. an electromagnetic valve; 6. a manual valve; 7. a diaphragm valve; 8. lubricating the oil conduit.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 2, the structure of the integrated quick-closing regulating valve based on the self-contained electro-hydraulic actuator of the invention is schematically illustrated, and the integrated quick-closing regulating valve comprises four parts, namely a steam regulating valve 3, a spring 2, a self-contained electro-hydraulic actuator 1 and a two-position two-way control valve 4. The steam regulating valve 3 comprises a valve head 301 in a valve seat body 302, the valve seat body 302 and a valve rod 303 fixedly connected with the valve head 301. The valve rod 303 of the steam regulating valve 3 is connected with the actuating rod 105 of the self-contained electro-hydraulic actuator 1; the spring 2 is sleeved outside the valve rod 303 of the steam regulating valve 3 and the actuating rod 105 of the self-contained electro-hydraulic actuator 1, and two ends of the spring respectively support the self-contained electro-hydraulic actuator 1 and a valve seat valve body 302 of the steam regulating valve 3; two oil ports of the two-position two-way control valve 4 are respectively communicated with the upper side oil cylinder 101 and the lower side oil cylinder 103 of the self-contained electro-hydraulic actuator 1.
Under the normal operation condition, the two-position two-way control valve 4 is in an open state, two oil ports are not communicated, the self-contained electro-hydraulic actuator 1 overcomes the spring force under the action of a positive and negative rotating oil pump, and the opening degree of a valve of the steam regulating valve 3 is controlled; when a signal for rapidly closing the valve is obtained, the two-position two-way control valve 4 acts to communicate the two oil cylinders on the upper side and the lower side of the self-contained electro-hydraulic actuator 1, so that the oil cylinders on the upper side and the lower side lose pressure difference, and the valve is rapidly closed under the action of spring force resilience.
As shown in fig. 3, the application schematic diagram of the integrated quick-closing control valve in the mechanical quick-closing control valve in the steam turbine is that after an external shutdown electric signal is obtained, the electromagnetic valve 5 is electrically controlled to operate the two-position two-way control valve 4 to communicate with the two oil cylinders on the upper side and the lower side of the self-contained electro-hydraulic actuator 1, so that the oil cylinders on the upper side and the oil cylinders on the lower side lose pressure difference, and the valve rod 303 of the steam control valve 3 is quickly closed under the spring force rebound effect.
As shown in fig. 4, a schematic diagram of the application of the mechanical quick-closing control valve to the steam turbine is provided with a two-position two-way mechanical control valve, after a handle of the manual valve 6 is manually or mechanically impacted, the two-position two-way control valve 4 acts to communicate with two oil cylinders on the upper side and the lower side of the self-contained electro-hydraulic actuator 1, so that the oil cylinders on the upper side and the lower side lose pressure difference, and the valve rod 303 of the steam control valve 3 is quickly closed under the action of spring force rebound.
As shown in fig. 5, in an application schematic diagram of the mechanical/electromagnetic quick-closing control valve in a steam turbine, a two-position two-way mechanical and electromagnetic combined action control valve is configured, after a handle is manually or mechanically impacted, or an electromagnet is electrified, the two-position two-way control valve 4 acts to communicate with two oil cylinders on the upper side and the lower side of the self-contained electro-hydraulic actuator 1, so that the oil cylinders on the upper side and the lower side lose pressure difference, and the valve rod 303 of the steam control valve 3 is quickly closed under the spring force rebound effect.
As shown in an application schematic diagram of the diaphragm quick-closing regulating valve in a steam turbine shown in fig. 6, a normally-closed diaphragm control valve 7 is configured, a lubricating oil pipeline 8 is added on the diaphragm control valve 7 and the two-position two-way control valve 4 together with a pipeline, after the lubricating oil pressure acts, the diaphragm control valve 7 is opened, the two-position two-way control valve 4 acts to communicate with two oil cylinders on the upper side and the lower side of the self-contained electro-hydraulic actuator 1, so that the oil cylinders on the upper side and the lower side lose pressure difference, and the valve rod 303 of the steam regulating valve 3 is quickly closed under the spring force rebound action.
As shown in fig. 7, after the multi-functional speed-closing regulating valve is applied to a steam turbine and is constructed by multiple control valves in parallel, the integrated speed-closing regulating valve has multiple closing modes such as mechanical speed closing, electromagnetic speed closing, oil pressure speed closing and the like, and can better meet the requirements of speed-closing protection reliability under various control conditions of the steam turbine while considering the regulating valve. The valve is suitable for being simultaneously used in the control design of the regulating valve and the quick-closing valve.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (4)
1. An integrated quick-closing regulating valve based on a self-capacitance type electro-hydraulic actuator is characterized by comprising a steam regulating valve driven by the self-capacitance type electro-hydraulic actuator, a spring, the self-capacitance type electro-hydraulic actuator and a two-position two-way control valve; the spring is sleeved outside the driving rod of the self-contained electro-hydraulic actuator, and two ends of the spring respectively support the self-contained electro-hydraulic actuator and a valve seat valve body of the steam regulating valve; two oil ports of the two-position two-way control valve are respectively communicated with an upper side oil cylinder and a lower side oil cylinder of the self-capacitance type electro-hydraulic actuator.
2. The integrated quick-closing regulating valve based on the self-contained electro-hydraulic actuator is characterized in that the two-position two-way control valve is in an open state, two oil ports are not communicated, and the self-contained electro-hydraulic actuator outputs driving force to control the opening degree of a steam regulating valve under the condition of overcoming the elastic force of a spring so as to realize regulation; the two-position two-way control valve is in a closed state, the two oil ports are communicated with the two oil cylinders on the upper side and the lower side of the self-contained electro-hydraulic actuator, so that the oil cylinders on the upper side and the lower side lose pressure difference, and the valve is quickly closed under the action of spring force resilience; and realizing quick closing.
3. The integrated quick-closing regulating valve based on the self-contained electro-hydraulic actuator according to claim 1 or 2, characterized in that the steam regulating valve comprises a valve head in a valve seat valve body, a valve seat valve body and a valve rod fixedly connected with the valve head; the valve rod of the steam regulating valve is connected with the actuating rod of the self-contained electro-hydraulic actuator to form a driving rod of the self-contained electro-hydraulic actuator, and the valve seat valve body is arranged at the upper end of the spring.
4. The integrated quick-closing regulating valve based on the self-contained electro-hydraulic actuator as claimed in claim 2, wherein the two-position two-way control valve realizes quick closing under any one of mechanical force, electromagnetic force and oil pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110637613.6A CN113374540A (en) | 2021-06-08 | 2021-06-08 | Integrated quick-closing regulating valve based on self-capacitance type electro-hydraulic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110637613.6A CN113374540A (en) | 2021-06-08 | 2021-06-08 | Integrated quick-closing regulating valve based on self-capacitance type electro-hydraulic actuator |
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| CN113374540A true CN113374540A (en) | 2021-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110637613.6A Pending CN113374540A (en) | 2021-06-08 | 2021-06-08 | Integrated quick-closing regulating valve based on self-capacitance type electro-hydraulic actuator |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201810355U (en) * | 2010-09-07 | 2011-04-27 | 上海电气电站设备有限公司 | Low-power energy-saving hydraulic switch type execution mechanism realizing one-way spring fast retraction |
| CN103629194A (en) * | 2013-12-10 | 2014-03-12 | 沈阳东北电力调节技术有限公司 | Mechanical quick-operation type integrated electro-hydraulic actuator |
| CN104197079A (en) * | 2014-08-11 | 2014-12-10 | 袁前灿 | Spring-hydraulic dual redundancy quick-action and servo control electro-hydraulic executor |
| CN205350521U (en) * | 2016-01-26 | 2016-06-29 | 扬州恒春电子有限公司 | Automatically controlled hydraulic actuator with emergent function of turn -offing |
| JP2018123732A (en) * | 2017-01-31 | 2018-08-09 | 株式会社東芝 | Steam turbine valve driving device |
| CN112049982A (en) * | 2020-09-24 | 2020-12-08 | 中国船舶重工集团公司第七0四研究所 | Small-sized integrated speed-changing main valve actuator |
-
2021
- 2021-06-08 CN CN202110637613.6A patent/CN113374540A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201810355U (en) * | 2010-09-07 | 2011-04-27 | 上海电气电站设备有限公司 | Low-power energy-saving hydraulic switch type execution mechanism realizing one-way spring fast retraction |
| CN103629194A (en) * | 2013-12-10 | 2014-03-12 | 沈阳东北电力调节技术有限公司 | Mechanical quick-operation type integrated electro-hydraulic actuator |
| CN104197079A (en) * | 2014-08-11 | 2014-12-10 | 袁前灿 | Spring-hydraulic dual redundancy quick-action and servo control electro-hydraulic executor |
| CN205350521U (en) * | 2016-01-26 | 2016-06-29 | 扬州恒春电子有限公司 | Automatically controlled hydraulic actuator with emergent function of turn -offing |
| JP2018123732A (en) * | 2017-01-31 | 2018-08-09 | 株式会社東芝 | Steam turbine valve driving device |
| CN112049982A (en) * | 2020-09-24 | 2020-12-08 | 中国船舶重工集团公司第七0四研究所 | Small-sized integrated speed-changing main valve actuator |
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Application publication date: 20210910 |
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