CN100370115C - Servomotor oil circuit regulating valve assembly of steam turbine regulating system - Google Patents
Servomotor oil circuit regulating valve assembly of steam turbine regulating system Download PDFInfo
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- CN100370115C CN100370115C CNB2006100213569A CN200610021356A CN100370115C CN 100370115 C CN100370115 C CN 100370115C CN B2006100213569 A CNB2006100213569 A CN B2006100213569A CN 200610021356 A CN200610021356 A CN 200610021356A CN 100370115 C CN100370115 C CN 100370115C
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Abstract
The present invention discloses a steam turbine regulating system servomotor oil circuit regulating valve group which comprises DDV valves mutually connected into a whole body, an electromagnetic reversing valve, a throttle valve and an unloading valve. The present invention is characterized in that through redundant configuration, at least two DDV valves are connected in parallel; oil openings P B of the DDV valves are connected in parallel; the oil openings T A are connected in parallel; the oil openings connected in parallel are communicated with pressure oil or pulsation oil; the oil openings T A connected in parallel are communicated with the pulsation oil or row oil. The present invention has the advantages of redundant configuration of DDV valves, high reliability of valve group, bilateral oil inlet of the DDV valves, high work stability and safety and high regulating quality of the valve group.
Description
Technical field
The present invention relates to steam turbine control system, relate in particular to the servomotor oil circuit modulating valve group of this system.
Background technique
Steam turbine control system as shown in Figure 1, when steam turbine normally moved, the winding of servomotor oil circuit modulating valve was instructed by DEH, thereby the aperture of steam regulation valve is advanced in the control of control oil engine stroke, change the steam flow that enters steam turbine, realize regulating the purpose of turbine speed.DDV valve in the valve group is the conversion elements that the instruction of DEH electricity changes into hydraulic pressure command, and when needs were driven big steam regulation valve, DEH made the DDV valve increase oil-feed or turns down oil extraction, thereby the oil engine impulse oil pressure is increased, oil engine is up, opens big valve, and steam flow increases; Otherwise, then make oil engine descending, turn down steam regulation valve, steam flow reduces.As seen, DDV valve group is the central hub of steam turbine control system, plays a part very crucially, therefore, its reliability is had very high requirement.Existing DDV valve block structure is as shown in Figure 2: by the DDV valve 1., solenoid directional control valve 2., throttle valve 3., 4. unloading valve wait and form, 1. oil engine pulsation oil circuit is controlled by single DDV valve, in case 1. fault of DDV valve will cause stopping accident.In addition, the DDV valve of existing valve group adopts four-way or threeway Placement, and during work, oil enters the spool chamber from DDV valve hydraulic fluid port on one side, and the hydraulic fluid port from the valve another side flows out poor work stability again; Especially, because fluid surges power and steady-state fluid force along with the pressure reduction before and after the spool constantly changes to the moment of spool, exerting oneself of the linear force motor of DDV valve also in continuous variation, if flow controller is adjusted improper to DDV valve operation point between limber up period, the DDV valve just can not provide enough flows to make impulse oil pressure power reach required pressure, under this operating mode, just might occur producing the big power of surging because of big flow, the linear force motor emergent power of DDV valve is saturated, force motor can't promote the situation of spool, this is a kind of operating mode of danger close to steam turbine set, has major safety risks.
Summary of the invention
Purpose of the present invention is the shortcoming that overcomes existing servomotor oil circuit modulating valve group, provides higher, the stable Security of a kind of reliability better high-quality servomotor oil circuit modulating valve group.
The technical solution that realizes the object of the invention is as follows:
A kind of steam turbine control system servomotor oil circuit modulating valve group comprises the DDV valve, solenoid directional control valve, throttle valve, the unloading valve that are connected to each other as a whole, it is characterized in that: described DDV valve redundant configuration, at least two parallel connections; Respectively with its hydraulic fluid port P, B parallel connection, hydraulic fluid port T, A parallel connection constitute two-way bilateral Placement by external pipe.
This valve group adopts the oil-feed control mode, and hydraulic fluid port P in parallel, the B of described DDV valve are communicated with pressure oil, and hydraulic fluid port T in parallel, A are communicated with pulsation oil.
This valve group adopts the oil extraction control mode, and hydraulic fluid port P in parallel, the B of described DDV valve is communicated with pulsation oil, hydraulic fluid port T in parallel, A oil extraction.
The hydraulic fluid port connecting passage of described DDV valve, solenoid directional control valve, throttle valve, unloading valve adopts the oil circuit integrated package, and described each valve all is installed on the oil circuit integrated package.
Described oil circuit integrated package is provided with impulse oil pressure power and detects mouth, and this detection mouth is equipped with pressure gauge or pressure transducer.
Beneficial effect of the present invention:
Since DDV valve redundant configuration, and adopt two-way bilateral Placement, on the one hand, the bilateral oil-feed of DDV valve, oil mass increases about one times; On the other hand, constitute afterflow control, be that the valve group carries out the transition to another steady working condition from a certain operating mode, whole control process has flow to pass through the DDV valve all the time, after stable, keep a constant flow in the DDV valve, can not stop, thereby guaranteed that the valve group has very high reliability, stability, effectively avoided the possibility that the linear force motor emergent power of DDV valve is saturated, can't promote spool.
Be example with valve group below, describe the present invention in detail by two DDV valve redundant configuration.
Description of drawings
Fig. 1 is a Steam Turhine Adjustment oil circuit system schematic;
Fig. 2 is the structural drawing of existing servomotor oil circuit modulating valve group;
Fig. 3 is a kind of structural drawing of the present invention;
Fig. 4 is an another kind of structural drawing of the present invention;
Fig. 5 is another structural drawing of the present invention.
Embodiment
Embodiment one
Referring to Fig. 3: this valve group by the DDV valve 1., solenoid directional control valve 2., throttle valve 3., unloading valve 4., pressure gauge 5., 6. the oil circuit integrated package combine.Wherein:
The DDV valve is two parallel connections 1., redundant configuration, and its hydraulic fluid port P is communicated with pressure oil, and hydraulic fluid port A is communicated with pulsation oil, hydraulic fluid port T oil extraction, hydraulic fluid port B shutoff need not.
3. throttle valve is connected between DDV valve hydraulic fluid port A, the T 1..But translational adjustment system static relation, the various operating modes of assurance valve group can stably be worked.
Solenoid directional control valve import 2. is communicated with security personnel's oil, and outlet is communicated with unloading valve upper chamber 4..
Unloading valve lower chambers is 4. connected pulsation oil, and upper chamber connects from solenoid directional control valve security personnel's oil 2..The feather valve switch so just can guarantee unit tripping operating mode or removal of load operating mode by the control of security personnel's oil, releases impulse oil pressure fast, the quick closing valve steam regulation valve, and the cutting-off valve admission guarantees unit safety, has improved the Security of adjusting security system.
Above-mentioned each valve is installed in the oil circuit integrated package and 6. goes up, and according to the hydraulic fluid port annexation of above-mentioned each valve, processes the 6. inner asphalt channel of oil circuit integrated package, each valve is installed on the oil circuit integrated package corresponding hydraulic fluid port 6. again.
5. or pressure transducer 6. open a mouth that is communicated with pulsation oil at the oil circuit integrated package, be used for the setting pressure table, monitor impulse oil pressure.
The working principle of this valve group: from the control command of the DEH of Steam Turhine Adjustment control centre, put on simultaneously on two DDV valves, two DDV valves move simultaneously, the control impulse oil pressure, and then actuator's oil engine of control steam regulation valve, adjust the oil engine piston stroke, change the aperture of steam regulation valve, reach the purpose of control steam flow.When a DDV valve fault, which fault DEH can detect and judge automatically, automatically signal is superimposed on the another DDV valve; system still can proper functioning; this has just been avoided causing because of DDV valve fault the possibility of steam turbine set shutdown, and therefore, the valve group has very high reliability.
Embodiment two
Referring to Fig. 4, with embodiment's one difference be: hydraulic fluid port P, B 1. is in parallel for the DDV valve, hydraulic fluid port T, A parallel connection.The valve group adopts the oil-feed control mode, and DDV valve hydraulic fluid port P in parallel, B 1. is communicated with pressure oil, and hydraulic fluid port T in parallel, A are communicated with pulsation oil.Because pressure oil is from the both sides oil-feed 1. of DDV valve, avoided the possibility that the linear force motor emergent power of DDV valve is saturated, can't promote spool, working stability, Security are good, the regulation quality height of valve group.All the other are identical with embodiment one.
Embodiment three
Referring to Fig. 5, with embodiment's two differences be: the valve group adopts the oil extraction control mode, and DDV valve hydraulic fluid port P in parallel, B 1. is communicated with pulsation oil, hydraulic fluid port T in parallel, A oil extraction.Its control effect is suitable with embodiment two.All the other are identical with embodiment two.
Obviously, in the actual engineering, should preferentially select embodiment two or embodiment three.
Claims (5)
1. steam turbine control system servomotor oil circuit modulating valve group, comprise the DDV valve, solenoid directional control valve, throttle valve, the unloading valve that are connected to each other as a whole, it is characterized in that: described DDV valve redundant configuration, at least two parallel connections, by external pipe respectively with its hydraulic fluid port P, B parallel connection, hydraulic fluid port T, A parallel connection constitute two-way bilateral Placement.
2. steam turbine control system servomotor oil circuit modulating valve group according to claim 1 is characterized in that: this valve group adopts the oil-feed control mode, and hydraulic fluid port P in parallel, the B of described DDV valve are communicated with pressure oil, and hydraulic fluid port T in parallel, A are communicated with pulsation oil.
3. steam turbine control system servomotor oil circuit modulating valve group according to claim 1 is characterized in that: this valve group adopts the oil extraction control mode, and hydraulic fluid port P in parallel, the B of described DDV valve is communicated with pulsation oil, hydraulic fluid port T in parallel, A oil extraction.
4. steam turbine control system servomotor oil circuit modulating valve group according to claim 1, it is characterized in that: the hydraulic fluid port connecting passage of described DDV valve, solenoid directional control valve, throttle valve, unloading valve adopts the oil circuit integrated package, and described each valve all is installed on the oil circuit integrated package.
5. steam turbine control system servomotor oil circuit modulating valve group according to claim 4 is characterized in that: described oil circuit integrated package is provided with impulse oil pressure power and detects mouth, and this detection mouth is equipped with pressure gauge or pressure transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100213569A CN100370115C (en) | 2006-07-06 | 2006-07-06 | Servomotor oil circuit regulating valve assembly of steam turbine regulating system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100213569A CN100370115C (en) | 2006-07-06 | 2006-07-06 | Servomotor oil circuit regulating valve assembly of steam turbine regulating system |
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| Publication Number | Publication Date |
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| CN1877086A CN1877086A (en) | 2006-12-13 |
| CN100370115C true CN100370115C (en) | 2008-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100213569A Active CN100370115C (en) | 2006-07-06 | 2006-07-06 | Servomotor oil circuit regulating valve assembly of steam turbine regulating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173310A (en) * | 2019-05-09 | 2019-08-27 | 岭澳核电有限公司 | A kind of steam turbine for nuclear power station steam valve regulating system and its method of controlling security |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939406B (en) * | 2014-02-24 | 2015-12-30 | 中国人民解放军空军工程大学 | The two redundancy electro-hydraulic servo valve control system of warm back-up based on pipeline fluid parameter designing |
| CN105351014A (en) * | 2015-12-11 | 2016-02-24 | 上海新力机器厂 | Novel disc type unloading valve of EH oil system oil engine of steam turbine |
| CN112302735B (en) * | 2020-10-26 | 2022-08-02 | 华北电力科学研究院有限责任公司 | Steam turbine main valve auxiliary system and control method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2438860Y (en) * | 2000-09-19 | 2001-07-11 | 北京和利时系统工程股份有限公司 | Hight-voltage electrohydraulic servo system mounted with DDV valve |
-
2006
- 2006-07-06 CN CNB2006100213569A patent/CN100370115C/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2438860Y (en) * | 2000-09-19 | 2001-07-11 | 北京和利时系统工程股份有限公司 | Hight-voltage electrohydraulic servo system mounted with DDV valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173310A (en) * | 2019-05-09 | 2019-08-27 | 岭澳核电有限公司 | A kind of steam turbine for nuclear power station steam valve regulating system and its method of controlling security |
| CN110173310B (en) * | 2019-05-09 | 2022-05-24 | 岭澳核电有限公司 | Steam valve adjusting system of steam turbine of nuclear power station and safety control method thereof |
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| CN1877086A (en) | 2006-12-13 |
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Owner name: SICHUAN ORIENT ELECTRIC AUTOMATIC CONTROL ENGINEER Effective date: 20121107 |
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Free format text: CORRECT: ADDRESS; FROM: 618201 DEYANG, SICHUAN PROVINCE TO: 618000 DEYANG, SICHUAN PROVINCE |
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Effective date of registration: 20121107 Address after: 618000 Jiangxi hi tech Industrial Park, Sichuan, Jinsha Road, No. 666, No. Patentee after: Dongfang Turbine Co., Ltd., Dongfang Electric Group Patentee after: Sichuan Orient Electric Automatic Control Engineering Co., Ltd. Address before: 618201 Deyang City, Sichuan Province town of Hanwang Patentee before: Dongfang Turbine Co., Ltd., Dongfang Electric Group |
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Address after: 618000 Jinsha Jiangxi Road, high tech Industrial Park, Deyang, Sichuan, 666 Co-patentee after: Dongfang Electric Automatic Control Engineering Co., Ltd. Patentee after: Dongfang Turbine Co., Ltd., Dongfang Electric Group Address before: 618000 Jinsha Jiangxi Road, high tech Industrial Park, Deyang, Sichuan, 666 Co-patentee before: Sichuan Orient Electric Automatic Control Engineering Co., Ltd. Patentee before: Dongfang Turbine Co., Ltd., Dongfang Electric Group |