CN103423505B - HV rapid switching valve - Google Patents
HV rapid switching valve Download PDFInfo
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- CN103423505B CN103423505B CN201210152454.1A CN201210152454A CN103423505B CN 103423505 B CN103423505 B CN 103423505B CN 201210152454 A CN201210152454 A CN 201210152454A CN 103423505 B CN103423505 B CN 103423505B
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Abstract
A kind of rapid switching valve, comprise control valve unit, hydraulic pressure execution device, described control valve unit comprises valve body, in described valve body, be provided with valve seat, and valve core head can coordinate and falls to being sitting on described valve seat; Described valve core head is connected with valve rod, and it is outer and be connected with described hydraulic pressure execution device that described valve rod protrudes upward described valve body vertically; It is characterized in that, described hydraulic pressure execution device comprises driving mechanism, hydraulic control module, and wherein, described driving mechanism comprises for the spring assembly driving described stem movement oil cylinder-piston rod assembly and be installed on described valve rod; Described hydraulic control module is for controlling the motion of oil cylinder-piston rod assembly.Above-mentioned HV rapid switching valve, have concurrently open soon, quick closing valve and regulatory function; Further, both can connect with control system and realize automatic linkage and control, can carry out again on the spot with long-range Non-follow control, valve position signal can be exported and accept external valve position signal, reaching the object that remote adjustment controls.
Description
Technical field
The present invention relates to a kind of rapid switching valve, especially relate to boiler feed pump turbine switching valve (HV valve).
Background technique
Boiler feed pump is the key being related to steam generator system safe and stable operation, is to utilize modern automatic control technology to design the important component part with the boiler automatic liquid level regulating system set up.Current China has boiler equipment more than 40 ten thousand, and wherein major part is industrial enterprise's boiler and power plant's steam generator system, and a very little part is used for the commercial fields such as resident's bathing pool.The stable operation of feed water pump is the basis of boiler operatiopn, is the important component part of modern boiler liquid level regulating system.Once feed water pump breaks down the security of operation of serious harm boiler, serious also will cause the generation of major accident.Therefore, strengthen routine servicing and the maintenance of steam generator system feed water pump, become the important process of modern boiler attendance department.
The driving style of boiler feed pump, general point motor and steam turbine two kinds of driving styles.Motor many employings Wechselstrommotor, so the rotating speed of feed water pump is constant speed, boiler feedwater control regulates through " throttling ".But electric motor operated is convenient, flexibly, take up an area little, and steam turbine drags, and it has steam pipework and operated valve member, runs and comparatively bothers, and takes up an area also large, but variable speed runs, without " throttling " loss.So, medium or small hot power station, when electrical network connects (online) generally all adopt electronic mode, only have isolated thermoelectricity plant (during without electrical network), first-phase project, in order to initiating switchup, boiler water filling, a starting trouble and the feed water pump of joining a steam turbine dragging must be had, be convenient to start use for the first time.What electrically driven feedpump consumed is the generated energy (station service) of power plant, be main frame from coal through a series of transformation of energy, and steam feed pump is the heat energy of steam consumed, be by coal through boiler convert to main steam do work after or do not do work and directly drag feed water pump into feed water pump small turbine.That is the dragging steam of feed water pump small turbine have two kinds may, a kind of is the live steam of boiler, and one is after main steam turbine, has done drawing gas of part merit.
Boiler feed pump turbine switching valve (HV valve) is used on boiler feed pump small turbine admission passage for subsequent use, requirement for this switching valve is when system needs to carry out the switching of vapour source, receive switching command can react fast, valve (all≤0.2 second open and close time) can be opened or closed rapidly.Meanwhile, also wish that this switching valve has regulatory function, the throttle flow of small turbine can be regulated according to instruction, to meet the needs of boiler feed water pump power.
Summary of the invention
For this reason, the object of the present invention is to provide a kind of HV rapid switching valve, have concurrently open soon, quick closing valve and regulatory function.
Further, the object of the present invention is to provide a kind of HV rapid switching valve, both can connect with control system and realize automatic linkage and control, can carry out again on the spot with long-range Non-follow control, valve position signal can be exported and accept external valve position signal, reaching the object that remote adjustment controls.
For this reason, the invention provides a kind of rapid switching valve, comprise control valve unit, hydraulic pressure execution device, described control valve unit comprises valve body, in described valve body, be provided with valve seat, and valve core head can be engaged on described valve seat; Described valve core head is connected with valve rod, and it is outer and be connected with described hydraulic pressure execution device that described valve rod protrudes upward described valve body vertically; Wherein, described hydraulic pressure execution device comprises driving mechanism, hydraulic control module, and wherein, described driving mechanism comprises for the spring assembly driving described stem movement oil cylinder-piston rod assembly and be installed on described valve rod; Described hydraulic control module for the motion that controls oil cylinder-piston rod assembly to carry out quick closing valve, to open and adjustment operation soon.
Preferably, described driving mechanism comprises oil cylinder and can reciprocating piston rod wherein, described piston rod and described valve rod coaxially arranged and be fixed together.
Preferably, the length that described piston rod stretches out described cylinder body is provided with described spring assembly, described spring assembly be Compress Spring with shrink with can relative described piston rod movement during stretching, extension.
Preferably, described hydraulic control module comprises the fast valving control valve being communicated with working voltage oil, the cartridge valve be connected with described fast valving control valve, and described cartridge valve is connected to the entrance of described oil cylinder and is connected to oil sump tank; Also comprise the adjusting control valve being communicated with working voltage oil, described adjusting control valve is connected to the entrance of described oil cylinder and is connected to oil sump tank.
Preferably, described fast valving control valve is set as quick closing valve in the energized state, often opens under non-power status; When converting the valve position state of fast valving control valve, fast valving control valve can be set as quick closing valve under non-power status, often opens in the energized state.
Preferably, described hydraulic control module also comprises lock-up valve, and described lock-up valve to be connected between described adjusting control valve and cartridge valve and to be connected to the entrance of described oil cylinder.
Preferably, also comprise Systematical control processing unit, this Systematical control processing unit receives the signal from external control signal unit and inner valve position feedback unit, and transmits signals to described adjusting control valve.
Preferably, described hydraulic control module also comprises linear displacement transducer assembly, to respond to the position of the valve rod of described control valve unit.
Preferably, described hydraulic pressure execution device by support installing on described valve body.
Preferably, described valve rod is provided with Sealing to realize the sealing between described valve body and described valve rod, and described Sealing adopts three layers of filling-material structure.
In addition, be provided with groove, be provided with contiguous block at valve stem end in valve core head axial centre position, described contiguous block is engaged in described groove, and a spool gland to be sheathed on valve rod and to be connected on valve gap.
Described valve gap is also provided with guide sleeve, and described valve rod extends through guide sleeve and stretches out outside valve body, and described Sealing is arranged between described valve rod and described guide sleeve.
Invention further preferably includes electric control system, this electric control system is made up of this control part and control part far away, reaches position, valve pass puts in place, the instruction of actual opening valve degree with output valve.
Compared with prior art, rapid switching valve of the present invention have concurrently open soon, quick closing valve and regulatory function, be particularly useful on boiler feed pump small turbine admission passage for subsequent use, can react fast when receiving switching command, open or close valve rapidly, and the throttle flow of small turbine can be regulated according to instruction, to meet the needs of boiler feed water pump power.
Accompanying drawing explanation
Referring now to the following drawings, an example of the present invention embodiment is described, in the accompanying drawings:
Fig. 1 shows the schematic diagram comprising the intake system that HV rapid switching valve of the present invention is applied;
Fig. 2 shows the structural representation of HV rapid switching valve of the present invention, and wherein control valve unit is sectional view;
Fig. 3 is the structural representation of HV rapid switching valve control valve unit of the present invention;
Fig. 4 A and Fig. 4 B shows the actuating device of hydraulic system shown in Fig. 4 structural representation; And
Fig. 5 shows the hydraulic pressure execution device fundamental diagram of HV rapid switching valve of the present invention shown in Fig. 2.
Embodiment
First shown in Figure 1, there is shown the schematic diagram comprising the intake system that HV rapid switching valve of the present invention is applied, the basic functional principle of switching valve in this intake system is described below in conjunction with this figure.
When dragging the small turbine load down of boiler feed pump, working steam parameter also declines thereupon.Steam turbine drops to vapour source switching point from high load, namely turbine system is answered to control needs, during the Pressure testing comparison value that user sets and below this value, if low pressure modulating valve aperture is to when being greater than 95%, working steam still can not meet the demands, then need to be switched to high-pressure steam source, identical with low pressure modulating valve, a difference is obtained after actual speed and given rotating speed, after PID calculates, the LVDT signal of switching valve oil engine turns back to servoboard, it and control signal relatively after, export and control electric current to electrohydraulic control, control electro-hydraulic servo valve events, change the aperture of switching valve, change turbine speed to meet above-mentioned requirements, when actual speed is consistent with rotating speed of target, when the LVDT feedback signal of switching valve oil engine is consistent with control signal, electrohydraulic control cuts off oil engine and enters, oil extraction, switch aperture to keep, complete a self-regulating process.Meanwhile, low pressure modulating valve oil engine will continue out large to standard-sized sheet, and the upper reverse stop valve of low pressure admission pipeline is switched to high-pressure steam source and completes after automatically closing.Operating mode below switching point, low pressure modulating valve standard-sized sheet, generating unit speed is controlled by switching valve.
When steam turbine load up, working steam and high-pressure steam source parameter rise all thereupon, steam turbine from low-load rise to vapour source switching point and more than, working steam parameter can meet the requirement of main engine power to confluent, need be switched to low-pressure steam source.Because high-pressure steam source parameter rises, switching valve meets the requirement of main engine power to confluent by turning down gradually, and starts handoff procedure, and in handoff procedure, four sections of extraction check valves will be opened automatically, after after switching valve complete shut-down, handoff procedure completes, generating unit speed is controlled by low pressure modulating valve again.
Again as shown in Figure 2, there is shown the structural representation of HV rapid switching valve of the present invention, wherein control valve unit is sectional view; And Fig. 3 shows the structural representation of control valve unit.Rapid switching valve control valve unit 100 of the present invention comprises valve body 101, this valve body 101 comprises steam inlet 1011 and steam (vapor) outlet 1012, at valve inner, be provided with valve seat 102 between steam inlet 1011 and steam (vapor) outlet 1012, valve core head 103 can coordinate to fall to being sitting on valve seat 102.Valve core head 103 is connected to one end of valve rod 104.As shown in Figure 3, valve core head 103 axial centre position is provided with a groove 1031, on the end of valve rod 104, be provided with the contiguous block 1041 that size is greater than valve rod 104 diameter, this contiguous block 1041 is arranged in the groove 1031 of valve core head simultaneously.In addition, as shown in the figure, a spool gland 105 is also arranged with above valve core head 103, on valve rod 104, this spool gland 105 forms the shoulder part 1051 that contiguous block 1041 can be pressed in the groove 1031 of valve core head 103 near the end face of contiguous block 1041, thus valve core head is connected to valve stem end.Meanwhile, spool gland 105, end face is relative therewith the other end axially upwards extends along valve rod 104, and by pin 106 be fixed on bonnet 107, along valve rod 104 axially on the guide sleeve 1071 of downward-extension.By this structure, valve core head 103 can be fixedly connected on one end of valve rod 104.
In addition, in order to ensure valve rod 104 through bonnet 107 move up and down in process, valve rod 104 can move smoothly along guide sleeve 1071, simultaneously in order to reduce the wearing and tearing between valve rod 104 and guide sleeve, also in order to prevent the fluid in valve body 101 from may leak into outside valve means with the to-and-fro motion of valve rod 104, between valve rod 104 and guide sleeve 1071, be also provided with lining 108 and Sealing 109, Sealing 109 is such as made up of filler.
Bonnet 7 is by dismountable fixed block, and such as screw, nut are connected on valve body 101.In addition, in order to ensure sealing effect, bonnet 107 is stretched in one end of Sealing 109, and the filler forming Sealing 109 firmly fixes in place by fixing bolt 1011 by a hold-down grid 1010.
Below by reference to the accompanying drawings to rapid switching valve of the present invention adopt control valve unit embodiment to be described; Wherein, Sealing 109 can adopt tri-layer filling-material structure, to guarantee that valve stem seal is without leaking outside.In addition, hold-down grid 1010 adopts the structure of adjustable pretightening force, by arranging disc spring, provides auxiliary preload pressure to seal to filler.But what it will be understood by those skilled in the art that although this embodiment adopts is the control valve unit of dihedral single-seat valve form, dihedral single-seat valve structure have leakage rate little, close tight feature, in related domain, the control valve unit of other structure can also be used for the present invention.Be not described in detail in this.
Control valve unit of the present invention is driven by a set of hydraulic pressure execution device, is driven specifically by valve rod is connected with hydraulic pressure execution device, to realize unlatching proposed by the invention, closedown, quick closedown, Flow-rate adjustment and to protect the functions such as position.Be described in detail below in conjunction with accompanying drawing illustrated embodiment and illustrate.
As shown in Fig. 2 and Fig. 4 A, 4B, rapid switching valve of the present invention also comprises hydraulic pressure execution device 200, this hydraulic pressure execution device 200 comprises support 201, and this support 201 is erected in the valve rod 104 axially top of control valve unit, is fixed on bonnet 107 by the link of such as bolt component.
Support 201 is in housing structure form, and this housing structure is such as roughly in cylindrical or cube shaped.In the inside of support 201, be provided with piston rod 202 coaxially with valve rod 104, the lower end of this piston rod 202 is connected with valve rod 104 by land 2012.Spring assembly 203 one end is resisted against the baffle plate 204 be fixed on piston rod 202, and its other end is resisted against the inner side roof of support 201.In the present embodiment, this spring assembly 203 is spiral compression spring forms; But, it will be understood by those skilled in the art that the spring assembly that also can adopt other form, such as belleville spring.In addition, in order to prevent spring assembly 203 off-axis to, in the present embodiment, baffle plate 204 is formed with convex shoulder 2041, the roof of support 201 is provided with baffle ring 205, and convex shoulder 2041 adapts with the diameter of baffle ring 205 and the internal diameter of helical spring 203, like this, in spring assembly compression with when stretching, the axial displacement of stablizing, not offseting can be realized.As shown in Figure 4 A and 4 B shown in FIG., baffle plate 204 can be fixedly connected on piston rod 202 by nut, and baffle ring 205 can be connected to inside support on roof by the similar fashion such as Bond, fixed block, or can form with roof inside support.
Piston rod 202 extends vertically upward, extends through hydraulic control module 206, and this hydraulic control module 206, for the motion of control piston bar 202, will be described in more detail below.Piston rod 202 extends further vertically upward, stretches in oil cylinder 207.The part that piston rod 202 is arranged in oil cylinder 207 is provided with piston 208.It is outside that piston rod 202 stretches out oil cylinder 207 further.
In the illustrated embodiment in which, the cylinder cap outside of oil cylinder 207 is provided with limit switch assembly 209, and the limit position that piston rod 202 axially moves upward is set to piston rod and stretches out the top 2021 of oil cylinder and contact with the limit switch 2091 in limit switch assembly 209.
Between hydraulic control module 206 and oil cylinder 207, be connected with oil pipe 2010 to realize the fuel feeding to oil cylinder 207 according to the working condition of hydraulic control module 206, thus realize the motion control to piston rod 202.Hereafter will be further described this.
Hydraulic pressure execution device 200 also comprises linear displacement transducer assembly 2011, and this linear displacement transducer 2011 is arranged on the outside of oil cylinder 207, and its effect makes feedback for the position of the valve rod 104 to control valve unit 100.Hereafter also will be further described this.
As shown in Figure 5, there is shown linkage structure and the working principle of the hydraulic pressure execution device of rapid switching valve of the present invention.As shown in the figure, hydraulic control module 206 comprises filler opening 2061, the fast valving control valve 2062 that can be connected with filler opening 2061, and this fast valving control valve 2062 is set as quick closing valve in the energized state, often opens under non-power status; Certainly, the art personnel are appreciated that fast valving control valve can be set as quick closing valve under non-power status, often opens in the energized state if under the state of the valve position of conversion solenoid valve; The cartridge valve 2063 be connected with fast valving control valve 2062, this cartridge valve 2063 is connected to the filler opening 2071 of oil cylinder 207, and is connected to oil sump tank T; The filler opening 2061 of hydraulic control module 206 is also connected to adjusting control valve 2064, this adjusting control valve 2064 is also connected to the filler opening 2071 of oil cylinder 207, and adjusting control valve 2071 is also connected to oil sump tank T, and be connected with the Systematical control processing unit 301 of electric control system 300, the signal from this Systematical control processing unit 301 can be accepted.Systematical control processing unit 301 receives the signal from valve position feedback unit 302 simultaneously, and receives the signal from external control signal unit 303.
By the layout of above hydraulic control module 206 and according to the signal from Systematical control processing unit 301, working procedure of the present invention is as described below:
Open: fast valving control valve 2062 is not charged, working voltage oil P is through the control chamber of fast valving control valve 2062 to cartridge valve 2063, and cartridge valve 2063 closes; Adjusting control valve 2064 accepts valve opening signal, and the inner oil-feed path of adjusting control valve 2064 is connected, and pressure oil, through adjusting control valve, enters oil cylinder 207.Piston 202 works and compression spring assembly 203, spring energy-storage, valve opening.
Close: fast valving control valve 2062 is not charged, working voltage oil P is through the control chamber of fast valving control valve 2062 to cartridge valve 2063, and cartridge valve 2063 closes; Adjusting control valve 2064 accepts to close valve signal, and the inner way to cycle oil of adjusting control valve 2064 is connected, and oil cylinder 207 becomes path with fuel tank T-shaped, now spring assembly 203 releases energy, piston 202 works under spring force, and oil enters fuel tank T 2064 times from oil cylinder 207 through adjusting control valve, and valve is normally closed.
Quick closedown: fast valving control valve 2062 obtains electric, the hydraulic fluid port that working voltage oil P enters fast valving control valve 2062 is closed, oil in the control chamber of cartridge valve 2063 gets back to fuel tank T through fast valving control valve 2062, cartridge valve 2063 is opened, spring assembly 203 releases energy simultaneously, piston 202 rapid operation under spring force, hydraulic oil flows back to fuel tank T from oil cylinder 207 fast through cartridge valve 2063, completes valve rapid-closing.
Regulatory function: fast valving control valve 2062 is not charged, working voltage oil P is through the control chamber of fast valving control valve 2062 to cartridge valve 2063, and cartridge valve 2063 closes; Adjusting control valve 2064 hopper bit instruction signal, oil-feed (oil return) path or on-off, to realize valve position adjusting control function.
In addition, more as shown in Figure 5, be connected on the path of oil cylinder oil inlet mouth 2071, be also provided with lock-up valve 2065 at adjusting control valve 2064, this lock-up valve realizes protecting bit function, that is:
Protect bit function: fast valving control valve 2062 is not charged, working voltage oil P is through the control chamber of fast valving control valve 2062 to cartridge valve 2063, and cartridge valve 2063 closes; Now lock-up valve 2065 is charged, and valve is in original position.
Electric control system 300 receives valve and reaches a signal, closes the signal such as signal, actual opening valve degree signal (i.e. valve position signal) that puts in place.
In addition, support 101 can be provided with the terminal box 303 for electric control system 300, to save space, convenient installation, maintenance simultaneously.
Below in conjunction with the embodiments, rapid switching valve of the present invention is described in detail; But those skilled in the art can understand, in the scope not departing from connotation of the present invention, can also to making multiple change or modification, these changes or modification all will fall into protection scope of the present invention.
Claims (9)
1. a rapid switching valve, comprises control valve unit, hydraulic pressure execution device, and described control valve unit comprises valve body, in described valve body, be provided with valve seat, and valve core head can fall to being sitting on described valve seat ordinatedly; Described valve core head is connected with valve rod, and it is outer and be connected with described hydraulic pressure execution device that described valve rod protrudes upward described valve body vertically; It is characterized in that, described hydraulic pressure execution device comprises driving mechanism, hydraulic control module, and wherein, described driving mechanism comprises for the spring assembly driving described stem movement oil cylinder-piston rod assembly and be installed on described valve rod; Described hydraulic control module for the motion that controls oil cylinder-piston rod assembly to carry out quick closing valve, to open and adjustment operation soon; Wherein:
Described hydraulic control module comprises the fast valving control valve being communicated with working voltage oil, the cartridge valve be connected with described fast valving control valve, and described cartridge valve is connected to the entrance of described oil cylinder and is connected to oil sump tank; Also comprise the adjusting control valve being communicated with working voltage oil, described adjusting control valve is connected to the entrance of described oil cylinder and is connected to oil sump tank.
2. rapid switching valve as claimed in claim 1, is characterized in that, described driving mechanism comprises oil cylinder and can reciprocating piston rod wherein, described piston rod and described valve rod coaxially arranged and be fixed together.
3. rapid switching valve as claimed in claim 2, it is characterized in that, the length that described piston rod stretches out described oil cylinder is provided with described spring assembly, described spring assembly be Compress Spring with shrink with can relative described piston rod movement during stretching, extension.
4. rapid switching valve as claimed in claim 1, it is characterized in that, described fast valving control valve is set as quick closing valve in the energized state, often opens under non-power status.
5. the rapid switching valve as described in claim 1 or 4, is characterized in that, described hydraulic control module also comprises lock-up valve, and described lock-up valve to be connected between described adjusting control valve and cartridge valve and to be connected to the entrance of described oil cylinder.
6. rapid switching valve as claimed in claim 5, it is characterized in that, also comprise Systematical control processing unit, this Systematical control processing unit receives the signal from external control signal unit and inner valve position feedback unit, and transmits signals to described adjusting control valve.
7. rapid switching valve as claimed in claim 6, it is characterized in that, described hydraulic control module also comprises linear displacement transducer assembly, to respond to the position of the valve rod of described control valve unit.
8. rapid switching valve as claimed in claim 1, is characterized in that, described hydraulic pressure execution device by support installing on described valve body.
9. rapid switching valve as claimed in claim 1, it is characterized in that, described valve rod is provided with Sealing to realize the sealing between described valve body and described valve rod, and described Sealing adopts three layers of filling-material structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210152454.1A CN103423505B (en) | 2012-05-16 | 2012-05-16 | HV rapid switching valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210152454.1A CN103423505B (en) | 2012-05-16 | 2012-05-16 | HV rapid switching valve |
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| CN103423505A CN103423505A (en) | 2013-12-04 |
| CN103423505B true CN103423505B (en) | 2016-03-23 |
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| CN201210152454.1A Active CN103423505B (en) | 2012-05-16 | 2012-05-16 | HV rapid switching valve |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807490B (en) * | 2014-01-15 | 2016-04-20 | 同济大学 | A kind of gas-liquid linked fast valve door system |
| CN106870023B (en) * | 2017-04-14 | 2018-12-07 | 贵州电网有限责任公司电力科学研究院 | A kind of feed pump turbine speed-regulating system quick-closing valve opening device and open method |
| CN107747645A (en) * | 2017-11-25 | 2018-03-02 | 浙江杰特优动力机械有限公司 | A kind of quick-closing valve hydraulic cylinder assembly and its method of work |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH659307A5 (en) * | 1981-07-23 | 1987-01-15 | Kraftwerk Union Ag | ELECTROHYDRAULIC ACTUATOR ON A TURBINE VALVE. |
| DE9115429U1 (en) * | 1991-12-12 | 1992-04-16 | Exner-Chemie Ventile GmbH, Spezialarmaturen, 4040 Neuss | Valve |
| CN2112730U (en) * | 1991-10-30 | 1992-08-12 | 上海市平安高压调节阀厂 | Regulating valve for water supply |
| CN2157362Y (en) * | 1993-01-06 | 1994-02-23 | 荆加福 | Automatic backwater controlling valve for micropressure and atmospheric hot-water boiler |
| CN2227240Y (en) * | 1995-02-27 | 1996-05-15 | 上海平安高压调节阀门厂 | Minimum discharge controlled valve for boiler water supply pump |
| CN200946522Y (en) * | 2006-08-14 | 2007-09-12 | 黄云平 | Quick-close steam-extraction check valve |
| CN101625033A (en) * | 2009-08-05 | 2010-01-13 | 无锡卓尔阀业有限公司 | Water supply control valve for high-pressure boiler |
| CN202646869U (en) * | 2012-05-16 | 2013-01-02 | 江南阀门有限公司 | High voltage (HV) fast switch valve |
-
2012
- 2012-05-16 CN CN201210152454.1A patent/CN103423505B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH659307A5 (en) * | 1981-07-23 | 1987-01-15 | Kraftwerk Union Ag | ELECTROHYDRAULIC ACTUATOR ON A TURBINE VALVE. |
| CN2112730U (en) * | 1991-10-30 | 1992-08-12 | 上海市平安高压调节阀厂 | Regulating valve for water supply |
| DE9115429U1 (en) * | 1991-12-12 | 1992-04-16 | Exner-Chemie Ventile GmbH, Spezialarmaturen, 4040 Neuss | Valve |
| CN2157362Y (en) * | 1993-01-06 | 1994-02-23 | 荆加福 | Automatic backwater controlling valve for micropressure and atmospheric hot-water boiler |
| CN2227240Y (en) * | 1995-02-27 | 1996-05-15 | 上海平安高压调节阀门厂 | Minimum discharge controlled valve for boiler water supply pump |
| CN200946522Y (en) * | 2006-08-14 | 2007-09-12 | 黄云平 | Quick-close steam-extraction check valve |
| CN101625033A (en) * | 2009-08-05 | 2010-01-13 | 无锡卓尔阀业有限公司 | Water supply control valve for high-pressure boiler |
| CN202646869U (en) * | 2012-05-16 | 2013-01-02 | 江南阀门有限公司 | High voltage (HV) fast switch valve |
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Application publication date: 20131204 Assignee: Zhejiang Zhonghao Valve Co.,Ltd. Assignor: JIANGNAN VALVE Co.,Ltd. Contract record no.: X2021330000244 Denomination of invention: HV quick change-over valve Granted publication date: 20160323 License type: Common License Record date: 20210923 Application publication date: 20131204 Assignee: Zhejiang zhenfuhao Valve Co.,Ltd. Assignor: JIANGNAN VALVE Co.,Ltd. Contract record no.: X2021330000288 Denomination of invention: HV quick change-over valve Granted publication date: 20160323 License type: Common License Record date: 20210923 Application publication date: 20131204 Assignee: Zhejiang juzhixin Valve Co.,Ltd. Assignor: JIANGNAN VALVE Co.,Ltd. Contract record no.: X2021330000292 Denomination of invention: HV quick change-over valve Granted publication date: 20160323 License type: Common License Record date: 20210923 |