CN201474731U - Combination valve for a speed regulation system of a steam turbine - Google Patents
Combination valve for a speed regulation system of a steam turbine Download PDFInfo
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- CN201474731U CN201474731U CN2009201732073U CN200920173207U CN201474731U CN 201474731 U CN201474731 U CN 201474731U CN 2009201732073 U CN2009201732073 U CN 2009201732073U CN 200920173207 U CN200920173207 U CN 200920173207U CN 201474731 U CN201474731 U CN 201474731U
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Abstract
The utility model provides a combination valve for a speed regulation system of a steam turbine, which is characterized in that the combination valve comprises a fist electromagnetic directional valve, a second electromagnetic directional valve, a roller directional valve and a quick-closing valve; wherein the first electromagnetic directional valve, the second electromagnetic directional valve, and the roller directional valve are connected in series. The quick-closing valve comprises a T-shaped valve chamber, a first piston chamber and a second piston chamber which are respectively communicated with a first valve port and a second valve port, and a first cone valve and a second cone valve; the first piston chamber and the second piston chamber are also communicated with a third working port, a third valve port is communicated with a safety oil pipeline, thus leading the first cone valve and the second cone valve to be able to respectively open or close the first valve port and the second valve port under the safety oil pressure; and the first piston chamber and the second piston chamber are respectively provided with a first throttling orifice and a second throttling orifice, wherein the first throttling orifice is communicated with a high pressure main porthole oil port in the speed regulation system of the steam turbine, and the second throttling orifice is communicated with a low pressure main porthole oil port in the speed regulation system of the steam turbine.
Description
Technical field
The utility model relates to steam turbine control field, particularly a kind of combination brake switch and proporting that is used for turbine regulating system.
Background technique
The speed-adjusting and control system of steam turbine is the important component part of steam turbine, and in general, the speed control system of steam turbine is made up of parts such as high pressure fireresistant oil station, membrane valve, oil engine, low-voltage safety oil system and high and low pressure accumulators.Wherein, the major control of high pressure fireresistant oil system is to liking oil engine.
Oil engine is made up of oil cylinder, integrated package, electrohydraulic control/solenoid valve, displacement transducer/position limit switch etc.By the difference of control mode, oil engine can be divided into two kinds of continuous control type and two control types.Wherein the modulating valve oil engine is controlled oil engine by electrohydraulic control according to the command signal of load variations and is realized continuous control, and main stop valve is realized two controls by solenoid valve, and the high pressure fireresistant oil system provides power source as process oil for each oil engine of steam turbine.If break down during steam turbine operation, safeguarding mechanism can be closed each oil engine of steam turbine by low-voltage safety oil system and membrane valve control high pressure fireresistant oil system, thereby realizes the purpose of protection steam turbine.
Hence one can see that, in the speed control system of steam turbine, need realize speed governing to steam turbine by regulating a plurality of parts such as solenoid valve, membrane valve and low-voltage safety oil system.When wherein arbitrary parts break down, all can cause the operation troubles of turbine regulating system.
The model utility content
For fear of the problems referred to above, the utility model provides a kind of combination brake switch and proporting that is used for turbine regulating system, can simplify the complexity of turbine regulating system, and realizes safe and reliable control.
The technological scheme that its technical problem that solves the utility model adopts is:
A kind of combination brake switch and proporting that is used for turbine regulating system, described combination brake switch and proporting comprise first solenoid directional control valve, second solenoid directional control valve, roller selector valve and fast valve;
Described first solenoid valve has first inlet, first working hole and first return opening;
Described second solenoid valve has second inlet, second working hole and second return opening;
Described roller selector valve has the 3rd inlet, the 3rd working hole and the 3rd return opening;
Wherein, first inlet is communicated with high pressure fireresistant oil pipeline in the described turbine regulating system, and first working hole and second enters the mouth and is communicated with, and second working hole and the 3rd enters the mouth and is communicated with, and the 3rd working hole is communicated with safe oil-piping in the described turbine regulating system;
First return opening, second return opening and the 3rd return opening all are communicated with no pressure oil returning tube in the described turbine regulating system;
And, described fast valve comprise T type valve pocket, the first piston chamber and second piston cavity that are communicated with first valve port and second valve port of T type valve pocket respectively and lay respectively at described first piston chamber and second piston cavity in first cone valve and second cone valve;
The described first piston chamber and second piston cavity also are communicated with the 3rd working hole, the 3rd valve port of described T type valve pocket is communicated with safe oil-piping, so that first valve port and second valve port can be closed or open to first cone valve and second cone valve respectively under the effect of safety oil pressure;
Have the first segment discharge orifice and second throttle orifice in the described first piston chamber and second piston cavity respectively, the first segment discharge orifice is communicated with high pressure main inlet throttle-stop valve hydraulic fluid port in the described turbine regulating system, and second throttle orifice is communicated with low pressure main inlet throttle-stop valve hydraulic fluid port in the described turbine regulating system.
Preferably, described combination brake switch and proporting also comprises the 3rd solenoid valve, and described the 3rd solenoid valve has the 4th inlet, the 4th working hole and the 4th return opening;
Wherein, the 4th working hole is communicated with the pressure oil returning tube is arranged, and the 4th return opening is communicated with low pressure main inlet throttle-stop valve hydraulic fluid port by second throttle orifice, and the 4th inlet is communicated with high pressure main inlet throttle-stop valve hydraulic fluid port by the first segment discharge orifice.
Combination brake switch and proporting of the present utility model utilizes high pressure oil that the high pressure fireresistant oil system provides that the safety oil and the process oil of hydraulic control system are all become high pressure fireresistant oil, steam turbine high and low pressure main inlet throttle-stop valve can be controlled and throttle can be controlled again, thereby the simplification hydraulic control system has relatively reduced membrane valve and low-voltage safety oil system with existing system.
Description of drawings
Fig. 1 a is the plan view that is used for the combination brake switch and proporting of turbine regulating system of the present utility model.
Fig. 1 b is the plan view that is used for the combination brake switch and proporting of turbine regulating system of the present utility model.
Fig. 1 c is the side view that is used for the combination brake switch and proporting of turbine regulating system of the present utility model.
Fig. 2 is the structural representation of the turbine regulating system of application combination brake switch and proporting of the present utility model.
Fig. 3 a be steam turbine set when hanging lock safety oil flow to schematic representation.
Fig. 3 b be steam turbine set when making lock safety oil flow to schematic representation.
Fig. 3 c be steam turbine unit overspeed protection action or when manually making lock safety oil flow to schematic representation.
Fig. 3 d be high and low pressure main stop valve oil engine when carrying out movement test safety oil flow to schematic representation.
Embodiment
The purpose of this utility model is to provide a kind of turbine regulating system that is used for the combination brake switch and proporting of turbine regulating system and uses this combination brake switch and proporting, can simplify the complexity of turbine regulating system, and realizes safe and reliable control.
For making the purpose of this utility model, technological scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the utility model is further described.
Fig. 1 a to Fig. 1 c is respectively plan view, plan view and the side view that is used for the combination brake switch and proporting of turbine regulating system of the present utility model, shown in Fig. 1 a to Fig. 1 c, the combination brake switch and proporting that is used for turbine regulating system of the present utility model comprises first solenoid directional control valve 101, second solenoid directional control valve 102, roller selector valve 103 and fast valve 104.
Wherein, combination brake switch and proporting have the filler opening 111 that is communicated with the high pressure fireresistant oil pipeline of turbine regulating system, the oil outlet 112 that is communicated with no pressure oil returning tube, the safe hydraulic fluid port 114 that is communicated with safe oil-piping and with have that the pressure oil returning tube is communicated with pressure return opening 113 arranged.Two throttle orifices of fast valve 104 are communicated with high pressure main inlet throttle-stop valve hydraulic fluid port 115 and low pressure main inlet throttle-stop valve hydraulic fluid port 116 respectively.
In addition, combination brake switch and proporting also comprises the 3rd solenoid valve 105, and it can be communicated with high pressure main inlet throttle-stop valve hydraulic fluid port 115, low pressure main inlet throttle-stop valve hydraulic fluid port 116 and pressure return opening 113, to be used to test the high low pressure main inlet throttle-stop valve.
Fig. 2 is the structural representation of the turbine regulating system of application combination brake switch and proporting of the present utility model.As shown in Figure 2, first solenoid valve 201 has first inlet 211, first working hole 212 and first return opening 213; Second solenoid valve 202 has second inlet 221, second working hole 222 and second return opening 223; Roller selector valve 203 has the 3rd inlet the 231, the 3rd working hole 232 and the 3rd return opening 233.
Wherein, first inlet 211 is communicated with high pressure fireresistant oil pipeline 301 by filler opening 111 as shown in Figure 1a, first working hole 212 is communicated with second inlet 221, and second working hole 222 is communicated with the 3rd inlet 231, and the 3rd working hole 232 is communicated with safe oil-piping 302.
First return opening 213, second return opening 223 and the 3rd the return opening 233 all oil outlet 112 by as shown in Figure 1a are communicated with no pressure oil returning tube 303.
The first piston chamber 241 and second piston cavity 242 that fast valve 204 comprises T type valve pocket, interconnect by T type valve pocket and lay respectively in the piston cavity, can under the pressure effect of safety oil, close or open first valve port 243 of T type valve pocket and first cone valve 245 and second cone valve 246 of second valve port 244 respectively.
The 3rd working hole 232 is communicated with the first piston chamber 241 and second piston cavity 242 respectively, and the 3rd valve port 247 of T type valve pocket is communicated with pressure oil returning tube 304 is arranged.
Have the first segment discharge orifice 248 and second throttle orifice 249 in the first piston chamber 241 and second piston cavity 242 respectively, first segment discharge orifice 248 is communicated with high pressure main inlet throttle-stop valve hydraulic fluid port 305, and second throttle orifice 249 is communicated with low pressure main inlet throttle-stop valve hydraulic fluid port 306.
Combination brake switch and proporting of the present utility model comprises that also the 3rd solenoid valve 205, the three solenoid valves 205 have the 4th inlet the 251, the 4th working hole 252 and the 4th return opening 253.
Wherein, the 4th working hole 252 is communicated with pressure oil returning tube 304 is arranged, and the 4th inlet 251 is communicated with high pressure main inlet throttle-stop valve hydraulic fluid port 305 by first segment discharge orifice 248, and the 4th return opening 253 is communicated with low pressure main inlet throttle-stop valve hydraulic fluid port 306 by second throttle orifice 249.
Combination brake switch and proporting of the present utility model also can further comprise emergency trip device 106, and it is used for manual-lock roller selector valve 103 under emergency.
The working principle of combination brake switch and proporting under following several working conditions that is used for turbine regulating system of the present utility model is:
Steam turbine set is hung lock
Fig. 3 a be steam turbine set when hanging lock safety oil flow to schematic representation.After steam turbine set is hung lock, first solenoid valve 201, second solenoid valve 202 and roller selector valve 203 left bit line astragal electricity, conducting between the inlet of solenoid valve and the working hole ends between working hole and the return opening at this moment.
The high pressure fireresistant oil order is through first inlet, 211, first working hole 212, second inlet, 221, second working hole 222, the 3rd inlet the 231 and the 3rd working hole 232, enter in the first piston chamber 241 and second piston cavity 242 of fast valve 204, and promote first cone valve 245 and second cone valve 246 cuts out first valve port 243 and second valve port 244.
This moment, safe oil pressure was set up, safety oil by the first segment discharge orifice 248 in the piston cavity and second throttle orifice 249, flow to high pressure main inlet throttle-stop valve hydraulic fluid port 305 respectively and low pressure main inlet throttle-stop valve hydraulic fluid port 306 is communicated with, and enter into the oil cylinder of high and low pressure main stop valve oil engine, finally make the main stop valve standard-sized sheet of main stop valve oil engine.
Steam turbine set is made lock (electromagnetism is made lock)
Fig. 3 b be steam turbine set when making lock safety oil flow to schematic representation.After unit control system is made lock, first solenoid valve 201 and second solenoid valve, 202 right bit line astragal electricity, roller selector valve 203 left bit line astragals.At this moment, end conducting between working hole and the return opening between the inlet of first solenoid valve and second solenoid valve and the working hole.And conducting between the inlet of roller selector valve and the working hole ends between working hole and the return opening.
At this moment, high pressure fireresistant oil is by 201 blocking-up of first solenoid valve, safety oil order in the first piston chamber 241 of fast valve 204 and second piston cavity 242 is communicated with no pressure oil returning tube 303 by the 3rd working hole 232, the 3rd inlet 231, second working hole 222 and second return opening 223, and safe oil pressure is let out remove.
Under the pressure effect of the safe oil-piping 304 that is communicated with the 3rd valve port 247, first cone valve 245 and second cone valve 246 are opened first valve port 243 and second valve port 244.The oil of high and low pressure main stop valve oil engine oil cylinder is communicated with pressure oil returning tube 304 is arranged by first valve port 243, second valve port 244 and the 3rd valve port 247, makes the main stop valve of main stop valve oil engine close rapidly.
Lock is moved or manually beats in the unit overspeed protection
Fig. 3 c be steam turbine unit overspeed protection action or when manually making lock safety oil flow to schematic representation.After unit overspeed protection action or manually making lock, first solenoid valve 201 and second solenoid valve, 202 left bit line astragal electricity, and roller selector valve 203 under the effect of emergency trip device, right bit line astragal.At this moment, conducting between the inlet of first solenoid valve and second solenoid valve and the working hole ends between working hole and the return opening.And end conducting between working hole and the return opening between the inlet of roller selector valve and the working hole.
At this moment, high pressure fireresistant oil is after order is through first inlet, 211, first working hole 212, second inlet, 221, second working hole 222, by 203 blocking-up of roller selector valve.Safety oil order in the first piston chamber 241 of fast valve 204 and second piston cavity 242 is communicated with no pressure oil returning tube 303 by the 3rd working hole 232, the 3rd return opening 233, and safe oil pressure is let out remove.
Under the pressure effect of the safe oil-piping 304 that is communicated with the 3rd valve port 247, first cone valve 245 and second cone valve 246 are opened first valve port 243 and second valve port 244.The oil of high and low pressure main stop valve oil engine oil cylinder is communicated with pressure oil returning tube 304 is arranged by first valve port 243, second valve port 244 and the 3rd valve port 247, makes the main stop valve of main stop valve oil engine close rapidly.
The movement test of high and low pressure main stop valve oil engine
Fig. 3 d be high and low pressure main stop valve oil engine when carrying out movement test safety oil flow to schematic representation.Combination brake switch and proporting of the present utility model also comprises the 3rd solenoid valve 205, and it is used for high and low pressure main stop valve oil engine is carried out movement test.
When high and low pressure main stop valve oil engine needs movement test, when the 3rd solenoid valve 205 left bit line astragals, then the 4th inlet the 251 and the 4th working hole 252 conductings, the oil of high pressure main stop valve oil engine oil cylinder is communicated with pressure oil returning tube 304 is arranged by first segment discharge orifice 248; When the 3rd solenoid valve 205 right bit line astragal electricity, then conducting between the 4th working hole 252 and the 4th return opening 253, the oil of low pressure main stop valve oil engine oil cylinder is communicated with pressure oil returning tube 304 is arranged by second throttle orifice 249.This moment, oil engine can slowly be closed downwards, by the control coil electrification time, can finish high and low pressure main stop valve oil engine movement test at an arbitrary position.
Combination brake switch and proporting of the present utility model is provided with two the first relatively independent solenoid valves and second solenoid valve; be used for the safety protection of steam turbine, two solenoid valves are worked simultaneously, get one as two; when a solenoid valve breaks down, another solenoid valve still can ensure the safety protection of steam turbine.In addition; also be provided with one the 3rd solenoid valve; the movement test of the high and low pressure main inlet throttle-stop valve valve when being used for steam turbine high and low pressure main inlet throttle-stop valve on-line operation; the purpose of this test is when preventing the steam turbine long-time running; if the high and low pressure main inlet throttle-stop valve is often unmovable; in case main inlet throttle-stop valve valve generation jam causes the high and low pressure main inlet throttle-stop valve not close when having an accident, the steam turbine runaway accident takes place.In order to cancel normal hydraulic oil as safe oil; simultaneously making the lock protective gear with mechanical overspeed protection control is integrated; one cover roller selector valve also is set on high and low pressure main inlet throttle-stop valve fast valve and the pet valve; when two solenoid valves with after making lock protective gear extension lock; set up safe oil by the roller selector valve, reach the unlatching of control high and low pressure main inlet throttle-stop valve.
The utility model is based on steam turbine industry normal hydraulic oil and high pressure fireresistant oil and unites and improve on the basis of carrying out hydraulic control and innovate.Utilize high pressure oil that the high pressure fireresistant oil system provides that the safety oil and the process oil of hydraulic control system are all become high pressure fireresistant oil, steam turbine high and low pressure main inlet throttle-stop valve can be controlled and throttle can be controlled again, thereby the simplification hydraulic control system has relatively reduced membrane valve and low-voltage safety oil system with existing system.
The above, it is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, any those skilled in the art, in not breaking away from the technical solutions of the utility model scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, to any simple modification, equivalent variations and modification that above embodiment did, all still belong to the scope of technical solutions of the utility model according to technical spirit of the present utility model.
Claims (2)
1. a combination brake switch and proporting that is used for turbine regulating system is characterized in that, described combination brake switch and proporting comprises first solenoid directional control valve, second solenoid directional control valve, roller selector valve and fast valve;
Described first solenoid valve has first inlet, first working hole and first return opening;
Described second solenoid valve has second inlet, second working hole and second return opening;
Described roller selector valve has the 3rd inlet, the 3rd working hole and the 3rd return opening;
Wherein, first inlet is communicated with high pressure fireresistant oil pipeline in the described turbine regulating system, and first working hole and second enters the mouth and is communicated with, and second working hole and the 3rd enters the mouth and is communicated with, and the 3rd working hole is communicated with safe oil-piping in the described turbine regulating system;
First return opening, second return opening and the 3rd return opening all are communicated with no pressure oil returning tube in the described turbine regulating system;
And, described fast valve comprise T type valve pocket, the first piston chamber and second piston cavity that are communicated with first valve port and second valve port of T type valve pocket respectively and lay respectively at described first piston chamber and second piston cavity in first cone valve and second cone valve;
The described first piston chamber and second piston cavity also are communicated with the 3rd working hole, the 3rd valve port of described T type valve pocket is communicated with safe oil-piping, so that first valve port and second valve port can be closed or open to first cone valve and second cone valve respectively under the effect of safety oil pressure;
Have the first segment discharge orifice and second throttle orifice in the described first piston chamber and second piston cavity respectively, the first segment discharge orifice is communicated with high pressure main inlet throttle-stop valve hydraulic fluid port in the described turbine regulating system, and second throttle orifice is communicated with low pressure main inlet throttle-stop valve hydraulic fluid port in the described turbine regulating system.
2. the combination brake switch and proporting that is used for turbine regulating system as claimed in claim 1 is characterized in that described combination brake switch and proporting also comprises the 3rd solenoid valve, and described the 3rd solenoid valve has the 4th inlet, the 4th working hole and the 4th return opening;
Wherein, the 4th working hole is communicated with the pressure oil returning tube is arranged, and the 4th return opening is communicated with low pressure main inlet throttle-stop valve hydraulic fluid port by second throttle orifice, and the 4th inlet is communicated with high pressure main inlet throttle-stop valve hydraulic fluid port by the first segment discharge orifice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201732073U CN201474731U (en) | 2009-08-21 | 2009-08-21 | Combination valve for a speed regulation system of a steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201732073U CN201474731U (en) | 2009-08-21 | 2009-08-21 | Combination valve for a speed regulation system of a steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201474731U true CN201474731U (en) | 2010-05-19 |
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ID=42410979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201732073U Expired - Lifetime CN201474731U (en) | 2009-08-21 | 2009-08-21 | Combination valve for a speed regulation system of a steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201474731U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355263A (en) * | 2017-05-16 | 2017-11-17 | 上海淦凌电力设备有限公司 | A kind of small machine highback pressure control system of water pump |
| CN110242363A (en) * | 2019-03-14 | 2019-09-17 | 华电电力科学研究院有限公司 | A kind of protection system of the high security for Turbo-generator Set |
-
2009
- 2009-08-21 CN CN2009201732073U patent/CN201474731U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355263A (en) * | 2017-05-16 | 2017-11-17 | 上海淦凌电力设备有限公司 | A kind of small machine highback pressure control system of water pump |
| CN110242363A (en) * | 2019-03-14 | 2019-09-17 | 华电电力科学研究院有限公司 | A kind of protection system of the high security for Turbo-generator Set |
| CN110242363B (en) * | 2019-03-14 | 2024-02-09 | 华电电力科学研究院有限公司 | High-safety protection system for steam turbine generator unit |
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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: BEIJING ELECTRIC POWER EQUIPMENT GENERAL FACTORY C Free format text: FORMER NAME: BEIJING POWER EQUIPMENT GENERAL PLANT |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 102401 Beijing City, Fangshan District Liangxiang Haotian Street No. 12 Patentee after: Co., Ltd of Beijing Electrical Equipment Factory Address before: 102401 Beijing City, Fangshan District Liangxiang Haotian Street No. 12 Patentee before: Beijing Electric Power Equipment General Factory |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100519 |