CN2703873Y - Oil-way main-break protective velve assembly for steam turbine safety system - Google Patents
Oil-way main-break protective velve assembly for steam turbine safety system Download PDFInfo
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- CN2703873Y CN2703873Y CN 200320114468 CN200320114468U CN2703873Y CN 2703873 Y CN2703873 Y CN 2703873Y CN 200320114468 CN200320114468 CN 200320114468 CN 200320114468 U CN200320114468 U CN 200320114468U CN 2703873 Y CN2703873 Y CN 2703873Y
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- solenoid directional
- directional control
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Abstract
The utility model discloses an oil-way main-break protective valve assembly for steam turbine safety system, mainly aiming to solve the problems of the existing protective valve assembly, such as excessive elements, complex structure and high cost. The utility model is provided with a double-layer control structure comprising a leading control level and a liquid pressure amplification level, both of which are redundantly configured by at least two identical elements; the leading control level is composed of three electromagnetic directional valves with positioning indicators. The oil inlet of the electromagnetic directional valve is communicated with the main oil pipe channel of the safety oil through an oil inlet restrictor; the oil outlet of the electromagnetic directional valve is communicated with the oil outlet pipe channel. The control port of each electromagnetic directional valve is connected to the control port of one of the other two electromagnetic directional valves; thus, any two electromagnetic directional valves can compose a series control oil way. The liquid pressure amplification level is composed of two unloading valves in parallel; the oil inlet of the unloading valve is communicated with the main oil pipe channel of the safety oil; and the oil outlet of the unloading valve is communicated with the oil outlet pipe channel. The outlet end of the oil pressure signal of the electromagnetic directional valve is communicated with the inlet end of the oil pressure signal of the unloading valve. The utility model has the advantage of high reliability.
Description
Technical field
The utility model belongs to steam turbine safety system assembly, specifically, is that a kind of steam turbine safety system oil circuit master is interdicted the Protective valve group.
Background technique
The steam turbine safety system as shown in Figure 1; when steam turbine set was normally moved, safety valve (be among Fig. 1 high pressure master interdict the Protective valve group) was in closed condition, and main safe oil circuit keeps normal operating pressure; oil engine control steam inlet valve is in opening state, and steam enters steam turbine smoothly.When steam turbine set had an accident the needs shutdown, steam turbine control centre sent halt instruction, and safety valve is opened; with pressure oil (HPT) emptying in the main safe oil circuit, the oil circuit decompression, oil engine control steam inlet valve cuts out; block the steam that enters steam turbine, steam turbine is out of service.As seen, safety valve is the central hub of steam turbine safety system, plays a part very key, therefore, its reliability is had very high requirement.Reliability is embodied in two aspects, and the one, when accepting halt instruction, do not allow the safety valve tripping; The 2nd, when not having halt instruction, do not allow the safety valve malfunction.Obviously, single safety valve is difficult to meet the demands, thus in actual engineering, adopt the valve group of a plurality of similar elements redundant configuration to realize the oil extraction release usually, to guarantee the reliability of system.Existing safe valve block structure as shown in Figure 2, this valve group adopts four valve block structures, working connection is earlier in parallel in twos by four separate valves groups (every group contains a pilot solenoid valve and a cartridge valve), and then series connection, constitutes the main control oil circuit.This valve group has very high reliability, but shortcoming is complexity of structure, and number of elements is many, and manufacture difficulty is big, the cost height.
The model utility content
The purpose of this utility model, exactly in order to overcome the shortcoming of above-mentioned existing safety valve group, a kind of equal unfailing performance that has is provided, can reach equal control effect, and element few, simple in structure, be easy to make, safety valve group with low cost, its technical solution is as follows:
A kind of steam turbine safety system oil circuit master is interdicted the Protective valve group, comprise meter in device, solenoid directional control valve, status indicator, unloading valve, it is characterized in that: guide's controlled stage and hydraulic pressure amplifier stage by at least two similar elements redundant configuration are formed double-layer control structure; Described guide's controlled stage is made up of three solenoid directional control valves that have status indicator, the filler opening of solenoid directional control valve is communicated with the oily main oil pipe of safety road by the meter in device, its oil drain out is communicated with the oil extraction pipeline, one control port in two solenoid directional control valves of the control port of every solenoid directional control valve and all the other is connected, and makes any two solenoid directional control valves all form a series connection control oil channel; Described hydraulic pressure amplifier stage is composed in parallel by two unloading valves, and the filler opening of unloading valve is communicated with the oily main oil pipe of safety road, and its oil drain out is communicated with the oil extraction pipeline; The fuel injection pressure signal output terminal of solenoid directional control valve is communicated with the fuel injection pressure signal input end of unloading valve.
Described status indicator is pressure switch or valve phase indicator.
The beneficial effects of the utility model are: the reliability height, and element is few, and is simple in structure, is easy to make, and with low cost, only the element purchase commodity is one, can save cost 30%.
Below in conjunction with accompanying drawing in detail the utility model is described in detail.
Description of drawings
Fig. 1 is a steam turbine safety protection oil system schematic representation;
Fig. 2 is structure, the schematic diagram of existing safety valve group;
Fig. 3 is structure of the present utility model, schematic diagram;
Fig. 4 is another kind of structure of the present utility model, schematic diagram.
Embodiment
Embodiment one
Referring to Fig. 3, the utility model is a double-layer control structure, and every layer is all adopted the multicomponent redundant configuration, and first layer is guide's controlled stage, is made up of meter in device 1, three solenoid directional control valves 2, three pressure switches 3; Three solenoid directional control valves 2 are connected in parallel, and every solenoid directional control valve 2 all is provided with a pressure switch 3, and the oil inlet P of solenoid directional control valve 2 is communicated with safety oil (HPT) main oil pipe road by meter in device 1, and its oil drain out is communicated with oil extraction (T) pipeline; One control port B in two solenoid directional control valves of the control port A of every solenoid directional control valve and all the other is connected, any two solenoid directional control valves are all formed a series connection control oil channel, make guide's controlled stage form " three get two " logic hydraulic circuit, output oil pressure control signal.The second layer is the hydraulic pressure amplifier stage, is connected in parallel by two plug-in type unloading valves 4, and the filler opening of unloading valve 4 is communicated with safety oil (HPT) main oil pipe road, and its oil drain out is communicated with oil extraction (T) pipeline, forms " two get one " logic hydraulic circuit; The signal input part of unloading valve 4 is accepted the oil pressure control signal of guide's controlled stage output by the signal output part of pipeline connection solenoid directional control valve 2, carries out the emptying release to pressure oil in the working connection (HPT).
Its working principle is: from the accidental shutdown instruction of steam turbine control centre, be applied to simultaneously respectively on three solenoid directional control valves 2, because three solenoid directional control valves 2 constitute " three get two " logic hydraulic circuit, " three get two ", as long as 2 conductings of any two (or more than two) solenoid directional control valves are promptly arranged, just can make the control oil pressure release of pilot stage, this has just fully been avoided guide's controlled stage " to refuse " possibility of action; " three get two " goes back " surplusing one ", " surplus one ", be that any solenoid directional control valve 2 has fault, two solenoid directional control valves, 2 energy proper functioning are still arranged, guarantee that guide's controlled stage has the output of oil pressure control signal, this has just been avoided the possibility of guide's controlled stage " mistake " action, and therefore, guide's controlled stage has very high reliability.
Oil pressure control signal from guide's controlled stage, be applied to simultaneously respectively on two unloading valves 4, because two unloading valves 4 constitute " two get one " logic hydraulic circuit, and are identical with above-mentioned principle, " two get one ", promptly have unloading valve 4 fault-free at least, but the hydraulic pressure amplifier stage is normally just, with safety oil (HPT) emptying in the working connection, any unloading valve 4 faults, still have another can only proper functioning, this have just fully been avoided the hydraulic pressure amplifier stage " to refuse " possibility of action.Therefore, the hydraulic pressure amplifier stage also has very high reliability.
In order to guarantee the reliability of every solenoid directional control valve 2 itself, need often it to be carried out the online activity test, so that in time get rid of its fault, at any time keep normal state, so every solenoid directional control valve 2 all disposes pressure switch 3, state indication when being used to test also can be used as normal detection to solenoid directional control valve 2 work in service simultaneously.
Because take the two-stage control mode of redundant configuration, whole valve group had both embodied abundant security doctrine, had realized optimum configuration with minimum element again, realize the same device identical functions, reach equal effect.
Embodiment two
Referring to Fig. 4, with embodiment's one difference, be to substitute pressure switches 3 with solenoid valve valve phase indicator 5, all the other and embodiment one are identical, so will not describe in detail.
Claims (3)
1. a steam turbine safety system oil circuit master is interdicted the Protective valve group, comprise meter in device, solenoid directional control valve, status indicator, unloading valve, it is characterized in that: guide's controlled stage and hydraulic pressure amplifier stage by at least two similar elements redundant configuration are formed double-layer control structure; Described guide's controlled stage is made up of three solenoid directional control valves that have status indicator, the filler opening of solenoid directional control valve is communicated with the oily main oil pipe of safety road by the meter in device, its oil drain out is communicated with the oil extraction pipeline, one control port in two solenoid directional control valves of the control port of every solenoid directional control valve and all the other is connected, and makes any two solenoid directional control valves all form a series connection control oil channel; Described hydraulic pressure amplifier stage is composed in parallel by two unloading valves, and the filler opening of unloading valve is communicated with the oily main oil pipe of safety road, and its oil drain out is communicated with the oil extraction pipeline; The fuel injection pressure signal output terminal of solenoid directional control valve is communicated with the fuel injection pressure signal input end of unloading valve.
2. interdict the Protective valve group according to the described steam turbine safety system of claim 1 oil circuit master, it is characterized in that: described status indicator is a pressure switch.
3. interdict the Protective valve group according to the described steam turbine safety system of claim 1 oil circuit master, it is characterized in that: described status indicator is a valve phase indicator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320114468 CN2703873Y (en) | 2003-11-07 | 2003-11-07 | Oil-way main-break protective velve assembly for steam turbine safety system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320114468 CN2703873Y (en) | 2003-11-07 | 2003-11-07 | Oil-way main-break protective velve assembly for steam turbine safety system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2703873Y true CN2703873Y (en) | 2005-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320114468 Expired - Lifetime CN2703873Y (en) | 2003-11-07 | 2003-11-07 | Oil-way main-break protective velve assembly for steam turbine safety system |
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| CN (1) | CN2703873Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518485A (en) * | 2011-12-13 | 2012-06-27 | 中广核工程有限公司 | Tripping oil-return system for steam turbine for nuclear power station |
| CN104153829A (en) * | 2014-07-17 | 2014-11-19 | 北京首钢股份有限公司 | Method and device for starting power system of turbine unit for automatically switching oil circuits |
| CN108799213A (en) * | 2018-07-27 | 2018-11-13 | 佛山市恒力泰机械有限公司 | A kind of security system and method for refractory brick automatic hydraulic press |
| CN109516419A (en) * | 2018-12-08 | 2019-03-26 | 安徽柳工起重机有限公司 | High-altitude operation vehicle Safety Redundancy control device |
| CN111577406A (en) * | 2020-05-13 | 2020-08-25 | 东方电气自动控制工程有限公司 | Three-taking two-hydraulic shutoff protection device with online verification function |
| CN112648021A (en) * | 2020-11-30 | 2021-04-13 | 华电电力科学研究院有限公司 | Steam turbine AST electromagnetic valve activity test device and online maintenance and transformation method thereof |
-
2003
- 2003-11-07 CN CN 200320114468 patent/CN2703873Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518485A (en) * | 2011-12-13 | 2012-06-27 | 中广核工程有限公司 | Tripping oil-return system for steam turbine for nuclear power station |
| CN104153829A (en) * | 2014-07-17 | 2014-11-19 | 北京首钢股份有限公司 | Method and device for starting power system of turbine unit for automatically switching oil circuits |
| CN104153829B (en) * | 2014-07-17 | 2015-11-18 | 北京首钢股份有限公司 | Realize steam turbine set power system starting method and the device of oil circuit automatic switchover |
| CN108799213A (en) * | 2018-07-27 | 2018-11-13 | 佛山市恒力泰机械有限公司 | A kind of security system and method for refractory brick automatic hydraulic press |
| CN108799213B (en) * | 2018-07-27 | 2023-11-28 | 佛山市恒力泰机械有限公司 | Safety system and method of automatic hydraulic press for refractory bricks |
| CN109516419A (en) * | 2018-12-08 | 2019-03-26 | 安徽柳工起重机有限公司 | High-altitude operation vehicle Safety Redundancy control device |
| CN109516419B (en) * | 2018-12-08 | 2024-01-30 | 安徽柳工起重机有限公司 | Safety redundant control device for overhead working truck |
| CN111577406A (en) * | 2020-05-13 | 2020-08-25 | 东方电气自动控制工程有限公司 | Three-taking two-hydraulic shutoff protection device with online verification function |
| CN112648021A (en) * | 2020-11-30 | 2021-04-13 | 华电电力科学研究院有限公司 | Steam turbine AST electromagnetic valve activity test device and online maintenance and transformation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: DONGFANG ELECTRIC GROUP DONGFANG STEAM TURBINE CO. Free format text: FORMER NAME OR ADDRESS: DONGFAN STEAM TURBINE FACTORY |
|
| CP03 | Change of name, title or address |
Address after: 618201 Deyang City, Sichuan province Mianzhu Hanwang town Patentee after: Dongfang Turbine Co., Ltd., Dongfang Electric Group Address before: 618201 Deyang City, Sichuan province Mianzhu Hanwang town Patentee before: Dongfang Steam Turbine Plant |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20131107 Granted publication date: 20050608 |