CN207715785U - A kind of subcritical steam converter valve - Google Patents
A kind of subcritical steam converter valve Download PDFInfo
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- CN207715785U CN207715785U CN201820040614.6U CN201820040614U CN207715785U CN 207715785 U CN207715785 U CN 207715785U CN 201820040614 U CN201820040614 U CN 201820040614U CN 207715785 U CN207715785 U CN 207715785U
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Abstract
The utility model discloses a kind of subcritical steam converter valves, belong to pressure reducing valve technical field.Existing valve base of pressure reducing valve sealing surface washes away seriously, and interior leakage phenomenon is more, influences the normal use of pressure reducing valve, needs to frequently replace pressure reducing valve, causes its use cost high.The main valve plug of the utility model is hollow cavity, and axial direction wears a valve rod, and main valve plug side wall opens up flow aperture, and main valve plug inner cavity is arranged pilot valve, and the valve rod is fixedly connected with pilot valve.The valve rod driving pilot valve of the utility model is moved in main valve plug inner cavity, its exposing can be blocked or made to the flow aperture of main valve plug, and then control the steam flow of pressure reducing valve.When needing frequently to discharge small flow steam heat preserving pipeline, need to only pilot valve be driven to move, expose the flow aperture of main valve plug, discharge small flow steam, steam enters in main valve plug, sealing surface of seat will not be washed away, the interior leakage of pressure reducing valve will not be caused, can effectively extend pressure reducing valve uses the longevity.
Description
Technical field
The utility model is related to a kind of subcritical steam converter valves, belong to pressure reducing valve technical field.
Background technology
Subcritical steam converter valve is the important tune of 330MW Steam Turbine in Fire Power Plant bypath system high temperature high steams
One of unit is saved, its main function is to ensure the unit safeties such as boiler, steam turbine, reheater, condenser, efficient, economy
Operation.So its safety, stability and reliability are particularly important, most domestic power plant is completely dependent on import at present, and
The producer of state's interior energy manufacture production is also few, and the spread in performance of similar valve is uneven in the market.Steam Turbine in Fire Power Plant is normal
When operation, subcritical steam converter valve is to be chronically at closed state, when steam turbine breaks down, it is desirable to subcritical desuperheat
Boiler main steam is introduced bypass around steam turbine, while boiler main steam being subtracted by the necessary Quick open valve door of pressure reducing valve
It is sent into low side after temperature and is depressurized desuperheat again.The frequent small guide vane Open valve of meeting under even in everyday situations allows a small amount of steam outflow to use
With the temperature of Heat-insulation valve downstream pipe, but valve is frequently opened, and discharges small flow steam heat preserving pipeline, valve seat can be caused close
Cover washes away seriously, and interior leakage phenomenon is more, influences the normal use of pressure reducing valve, needs to frequently replace pressure reducing valve, cause its use at
This height.
Utility model content
In view of the drawbacks of the prior art, the purpose of this utility model is to provide one kind frequently discharging small flow steam insulation
The service life that will not cause interior leakage that will not be washed away to sealing surface of seat after pipeline is long, and low subcritical of use cost subtracts
Steam converter valve.
To achieve the above object, the technical solution of the utility model is：
A kind of subcritical steam converter valve, include the valve body for media flow, the valve seat set on valve inner, can be in valve
The main valve plug and valve deck to reciprocatingly slide in vivo, the main valve plug are hollow cavity, and axial direction wears one for driving main valve plug past
The valve rod moved again, main valve plug side wall open up at least one flow aperture for being flowed into for a small amount of medium, main valve plug inner cavity set
If one can block the pilot valve of flow aperture, the valve rod is fixedly connected with pilot valve.
The valve rod driving pilot valve of the utility model is moved in main valve plug inner cavity, can be carried out to the flow aperture of main valve plug
Its exposing is blocked or made, and then controls the steam flow of pressure reducing valve.When needing frequently to discharge small flow steam heat preserving pipeline,
Need to only pilot valve be driven to move, expose the flow aperture of main valve plug, discharge small flow steam, steam enters in main valve plug, no
Sealing surface of seat can be washed away, the interior leakage of pressure reducing valve will not be caused, the service life that can effectively extend pressure reducing valve is long, nothing
Pressure reducing valve need to be replaced repeatedly, and use cost is low.
Multiple flow apertures of respective area can be uniformly drilled out in main valve plug surrounding, are moved up and down by pilot valve to change
Area is worked as in the screening of flow aperture, achievees the purpose that adjust steam flow.Main valve plug is arranged several flow apertures, pilot valve according to
Different occasions, selection block the small number of perforations difference of flow, allow pilot valve not only to have the monomer functional of pressure release, be also equipped with simultaneously
Regulatory function of the valve when small flow discharges steam.
As optimization technique measure, the valve deck opens up the sliding eye for wearing valve rod, and the valve rod is fixedly connected with one
The locating part of sliding hole peripheral can be contradicted, the locating part is located in valve body cavity body.It is equipped between the valve rod and sliding eye
Packing seat, filler pressing sleeve and spacer ring are sealed, and filler is loaded in gap between Packing seat, filler pressing sleeve and sliding eye.It is described
Hold-down grid is arranged in valve deck above filler pressing sleeve, and hold-down grid is fixed on by stud one and nut one on gland.
As optimization technique measure, the valve stem slides connect an elastic component, and described elastic component one end can be with locating part
Inconsistent, the other end is fixedly connected with main valve plug, and driving main valve plug resets.
As optimization technique measure, the elastic component is connected in the cartridge cover of main valve plug, and the cartridge cover is fixed on master
Simple and practical in structure on spool inner wall, scheme is practical.
As optimization technique measure, the elastic component is spring, and spring is inconsistent by a spring capping and locating piece, bullet
Spring technology maturation reduces R＆D costs convenient for buying.
As optimization technique measure, the pilot valve includes that can block the stopper of flow aperture and be fixed with valve rod
The interconnecting piece of connection, the stopper is located at cartridge cover side, and is separated by a certain distance with the end of cartridge cover.The gear of pilot valve
Portion and cartridge cover are inconsistent, and valve rod drives main valve plug to be moved to valve deck end, and further elastic component is compressed, while main valve plug is beaten
It opens, steam largely enters, and when locating piece and valve deck are inconsistent, main valve plug is opened completely, the opening degree of main valve plug, can root
According to flexibly selection, and then balance, the stable regulation of realization unit is needed, when valve rod does not provide driving force, elastic component drives master
Valve core reset.
As optimization technique measure, the valve body is equipped with into vapour chamber, steam output chamber, described into vapour chamber and steam output chamber transverse and longitudinal cloth
It sets, the valve seat is bolted in the steam output chamber end.The utility model valve seat is screwed onto on valve body, complexity compared with prior art
Welding sequence, not only saved work(but also saved trouble, and greatly facilitated assembly and maintenance work, in addition the convertibility of valve seat, while
Improve the whole service life of the utility model.
As optimization technique measure, the steam output chamber is fixedly connected with a valve cup ring, institute with into the adjacent end sidewalls of vapour chamber
It states valve cup ring and opens up through-hole, a fastener is fixed on valve seat on valve body across through-hole, simple in structure, practical.
As optimization technique measure, the valve seat connects a valve cage, and valve cage upper end is spirally connected with valve deck, and lower end is positioned with valve seat
But axial displacement is arranged several admission openings, can avoid being fixed formula valve cage under high temperature environment without constraint, the valve cage side wall
Because thermally expanding the extruding generated, bending, the phenomenon for losing circle.The gap of main valve plug and valve cage increases to 0.3mm, is suitable for both
Workpiece generates different size of swell increment because of shape and the difference of wall thickness.Two rectangular channels are cut out in main valve plug upper end.It is inlayed in slot
Embedding special guide ring, guide ring are to disconnect ring-type, it has certain radial elastic power, the radial ruler of the adaptive valve cage inner circle of energy
Very little variation.Several parallel small arc-shaped annular grooves are processed with the boss position that valve cage positions in valve seat, to improve flow resistance drop
The flow velocity of low gap steam stream.Above-mentioned several points improve the hair that can effectively prevent trim card resistance phenomenon in the case where thermally expanding environment
It is raw.
As optimization technique measure, the valve body is spirally connected by pressure ring and valve deck ring with valve deck, square head screw and nut two
It sequentially passes through valve deck ring and pressure ring is fixed together valve deck and valve body, and mutually sealed with valve deck by pendant collet, sealing ring, carried
The reliability of high sealing.
Compared with prior art, the utility model has the advantages that：
The valve rod driving pilot valve of the utility model is moved in main valve plug inner cavity, can be carried out to the flow aperture of main valve plug
Its exposing is blocked or made, and then controls the steam flow of pressure reducing valve.When needing frequently to discharge small flow steam heat preserving pipeline,
Need to only pilot valve be driven to move, expose the flow aperture of main valve plug, discharge small flow steam, steam enters in main valve plug, no
Sealing surface of seat can be washed away, the interior leakage of pressure reducing valve will not be caused, the service life that can effectively extend pressure reducing valve is long, nothing
Pressure reducing valve need to be replaced repeatedly, and use cost is low.
Multiple flow apertures of respective area are uniformly drilled out in main valve plug surrounding, are moved up and down by pilot valve to change stream
Area is worked as in the screening of amount aperture, achievees the purpose that adjust steam flow.Several flow apertures are arranged in main valve plug, and pilot valve is not according to
Same occasion, selection block the small number of perforations difference of flow, allow pilot valve not only to have the monomer functional of pressure release, while being also equipped with valve
Men little flows discharge regulatory function when steam.
Description of the drawings
Fig. 1 is the utility model section view；
Fig. 2 is that Figure 1A-A locate section view；
Fig. 3 is Fig. 1 part-structure enlarged drawings.
Reference sign：
1- valve bodies, 2- gaskets, 3- valve seats, 4- valve cup rings, 5- main valve plugs, 51- flow apertures, 6- pilot valves, 61- gears
Portion, 62- interconnecting pieces, 7- cartridge covers, 8- guide rings, 9- valve cages, 10- elastic components, 11- spring cappings, 12- valve decks, 13- sealings
Circle, 14- pendant collets, 15- pressure rings, 16- valve deck rings, 17- Packing seats, 18- spacer rings, 19- fillers, 20- filler pressing sleeves, 21- fillers
Pressing plate, 22- studs one, 23- nuts one, 24- pneumatic actuators, 25- square head screws, 26- nuts two, 27- studs three, 28-
Nut three, 29- valve rods, 30- locating pieces, 31- pins one, 32- bolts, 33- spring washers, 34- pins two, 35- fasteners, 36- water supply groups
Part, 37- nozzle carriers, 38- springs are adjustable atomizer.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
On the contrary, the utility model cover it is any be defined by the claims do in the spirit and scope of the utility model
Replacement, modification, equivalent method and scheme.Further, right below in order to make the public have a better understanding the utility model
It is detailed to describe some specific detail sections in the datail description of the utility model.Do not have for a person skilled in the art
The description of these detail sections can also understand the utility model completely.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.On the contrary, when element is referred to as " directly existing " another element "upper",
There is no intermediary elements.Term as used herein " cross ", " vertical ", "upper", "lower" and similar statement simply to illustrate that
Purpose.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with the technology for belonging to the utility model
The normally understood meaning of technical staff in domain is identical.Term as used herein is intended merely to the mesh of description specific embodiment
, it is not intended that limitation the utility model.
As shown in Figs. 1-3, a kind of subcritical steam converter valve includes for the valve body 1 of media flow, inside valve body 1
Valve seat 3, the main valve plug 5 that can reciprocatingly slide in valve body 1 and valve deck 12.The main valve plug 5 is hollow cavity, and axial direction is worn
If a valve rod 29 for driving main valve plug 5 to move back and forth, 5 side wall of main valve plug opens up at least one for being flowed into for a small amount of medium
Flow aperture 51,5 inner cavity of main valve plug, which is arranged one, can block the pilot valve 6 of flow aperture 51, the valve rod 29 and guide
Spool 6 is fixedly connected by pin 2 34.
The valve rod 29 of the utility model drives pilot valve 6 to be moved in 5 inner cavity of main valve plug, can be small to the flow of main valve plug 5
Its exposing is blocked or is made in hole 51, and then controls the steam flow of pressure reducing valve.It is protected when needing frequently to discharge small flow steam
When warm pipeline, pilot valve 6 need to only be driven to move, expose the flow aperture 51 of main valve plug 5, discharge small flow steam, steam into
Enter in main valve plug, 3 sealing surface of valve seat will not be washed away, the interior leakage of pressure reducing valve will not be caused, can effectively extend pressure reducing valve
Service life it is long, without replacing pressure reducing valve repeatedly, use cost is low.
Multiple flow apertures 51 of respective area are uniformly drilled out in 5 surrounding of main valve plug, are moved up and down by pilot valve 6 to change
Area is worked as in the screening of variable-flow aperture 51, achievees the purpose that adjust steam flow.Several flow apertures 51, guide is arranged in main valve plug 5
For spool 6 according to different occasions, flow aperture 51 number difference is blocked in selection, and pilot valve 6 is allowed not only to have the monomer work(of pressure release
Can, while being also equipped with regulatory function of the valve when small flow discharges steam.
The valve body 1 is equipped with into vapour chamber, steam output chamber, and described to be arranged into vapour chamber and steam output chamber transverse and longitudinal, the valve seat 3 is bolted in
The steam output chamber end is simultaneously sealed by gasket 2.The utility model valve seat 3 is screwed onto on valve body 1, compared with prior art
Complicated welding sequence, not only saved work(but also saved trouble, and greatly facilitated assembly and maintenance work, in addition the convertibility of valve seat 3,
The whole service life of the utility model is also improved simultaneously.
The steam output chamber is fixedly connected with a valve cup ring 4 with into the adjacent end sidewalls of vapour chamber, and the valve cup ring 4 opens up logical
Hole, a fastener 35 are fixed on valve seat 3 on valve body 1 across through-hole, and the fastener 35 can be holding screw.
9 upper end of valve cage positions blending bolt 32 with valve deck 12, spring washer 33 fastens, and lower end is positioned with valve seat 3 but axial displacement
Without constraint, can avoid being fixed formula valve cage 9 under high temperature environment because thermally expanding the extruding generated, bending, the phenomenon for losing circle.It is main
Spool 5 and the gap of valve cage 9 increase to 0.3mm, are suitable for both workpiece because shape and the difference of wall thickness generate different size
Swell increment.Two rectangular channels are cut out in 5 upper end of main valve plug.Special guide ring 8 is inlayed in slot, guide ring 8 is to disconnect ring-type, it
With certain radial elastic power, the radial dimension variation of energy 9 inner circle of adaptive valve cage.In the boss that valve seat 3 and valve cage 9 position
Position processes several parallel small arc-shaped annular grooves, and the flow velocity of gap steam stream is reduced to improve flow resistance.Above-mentioned several points change
Into the generation that can effectively prevent trim card resistance phenomenon in the case where thermally expanding environment.
The valve body 1 is spirally connected by pressure ring 15 and valve deck ring with valve deck 12, and square head screw 25 and nut 2 26 sequentially pass through
Valve deck ring and pressure ring 15 are fixed together valve deck 12 and valve body 1, and mutually close by pendant collet 14, sealing ring 13 and valve deck 12
Envelope, improves the reliability of sealing.The pilot valve 6 includes that can block the stopper 61 of flow aperture 51 and consolidate with valve rod 29
Surely the interconnecting piece 62 connected, the stopper 61 is located at 7 side of cartridge cover, and is separated by a certain distance with the end of cartridge cover 7.
The valve deck 12 opens up the sliding eye for wearing valve rod 29, and filler 19 is equipped between the valve rod 29 and sliding eye
Pad 17, filler pressing sleeve 20 and spacer ring 18 are sealed, and are filled out in gap between 19 pad 17 of filler, filler pressing sleeve 20 and sliding eye
Material 19.Hold-down grid 21 is arranged in the valve deck 12 above filler pressing sleeve 20, and hold-down grid 21 passes through stud 1 and nut one
23 are fixed on gland.
The valve rod 29, which is fixedly connected with one, can contradict the locating part of sliding hole peripheral, and the locating part is thin nut and leads to
It crosses pin 1 to be fixedly connected with valve rod 29, the locating part is located in 1 cavity of valve body.The valve rod 29 is slidably connected an elastic component
10,10 one end of the elastic component can be inconsistent with locating part, and the other end is fixedly connected with main valve plug 5.The elastic component 10 connects
It is connected in the cartridge cover 7 of main valve plug 5, the cartridge cover 7 is fixed on 5 inner wall of main valve plug.The elastic component 10 is spring, spring
It is inconsistent by a spring capping 11 and locating piece 30.
1 upper end of valve body is spirally connected pneumatic actuator 24 by nut 3 28, stud 3 27, and 1 lower end connecting spring of valve body can
It includes the four big component composition such as nozzle, spring, spring base, spool to adjust atomizer 38, the adjustable atomizer 38 of spring.Spray
Mouth is mounted in nozzle carrier 37, is communicated with to water assembly 36, when desuperheating water flow nozzle seat 37, is overcome spring by the pressure of water
It pushing spool to generate displacement and sprays water mist, hydraulic pressure is bigger, and emitted dose is bigger, if hydraulic pressure reduces below the active force of spring, spring
Active force pushes spool to reduce the circulation area in spool gap to negative direction displacement, and the smaller emitted dose of hydraulic pressure is smaller, desuperheating water
Pressure and flow be by being controlled to a preposition regulating valve of water assembly 36, desuperheating water behind spool gap by spraying grain
The water mist of diameter very little, be uniformly blended in high-temperature steam heat absorption evaporation formed it is new by the mixed vapour after desuperheat.Spring can
Adjust 38 atomizing effect of atomizer good, heat absorption is fast.
A kind of embodiment applied to Steam Turbine of the utility model：
When Steam Turbine runs well, main valve plug 5 is failure to actuate substantially, completes the small of pipeline by pilot valve 6 completely
Flow keeps the temperature the adjusting of steam, and the flow that pneumatic actuator 24 drives pilot valve 6 to close main valve plug 5 in whole or in part is small
The small flow heat preservation of pipeline is completed in hole 51.When Steam Turbine starts or stops transport, the valve rod 29 of pneumatic actuator 24 first drives
Pilot valve 6 is moved to 12 end of valve deck, and then the stopper 61 of pilot valve 6 and cartridge cover 7 are inconsistent, and valve rod 29 drives main valve plug
5 move to 12 end of valve deck, and further elastic component 10 is compressed, while main valve plug 5 is opened, and steam largely enters, when locating piece 30
When inconsistent with valve deck 12, main valve plug 5 is opened completely, the opening degree of main valve plug 5, can flexibly select as needed, in turn
Balance, the stable regulation for realizing unit, when valve rod 29 does not provide driving force, elastic component 10 drives main valve plug 5 to reset.
The two valve balmy and bracing of the utility model, rational division of labor realize the double acting of pilot valve 6：Identical steam stream
Under amount, when by different size of spool, their Lift is different, and main valve plug Lift is low, upper-lower seal face
Between gap it is small, steam flow rate is fast, and it is big to wash away harm；Pilot valve Lift is high, and the gap between upper-lower seal face is big,
Steam flow rate is slow, and it is small to wash away harm；Final purpose is to avoid the frequent movement under small guide vane operating mode of main valve plug 5, is reduced to valve seat
Sealing surface washes away number, reduces failure rate, improves the sealing performance of valve seat.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement etc., should be included in the utility model made by within the spirit and principle of utility model
Protection domain within.
Claims (10)
1. a kind of subcritical steam converter valve includes the valve body for media flow（1）, be set to valve body（1）Internal valve seat（3）、
It can be in valve body（1）The main valve plug inside to reciprocatingly slide（5）And valve deck（12）, which is characterized in that the main valve plug（5）It is hollow
Chamber, axial direction wear one for driving main valve plug（5）The valve rod of reciprocating motion（29）, main valve plug（5）Side wall opens up at least one
Flow aperture for being flowed into for a small amount of medium（51）, main valve plug（5）Inner cavity, which is arranged one, can block flow aperture（51）Elder generation
Guide valve core（6）, the valve rod（29）With pilot valve（6）It is fixedly connected.
2. a kind of subcritical steam converter valve as described in claim 1, which is characterized in that the valve deck（12）It opens up for wearing
If valve rod（29）Sliding eye, the valve rod（29）The locating part of sliding hole peripheral, the limit can be contradicted by being fixedly connected with one
Part is located at valve body（1）In cavity.
3. a kind of subcritical steam converter valve as claimed in claim 2, which is characterized in that the valve rod（29）It is slidably connected one
Elastic component（10）, the elastic component（10）One end can be inconsistent with locating part, the other end and main valve plug（5）It is fixedly connected.
4. a kind of subcritical steam converter valve as claimed in claim 3, which is characterized in that the elastic component（10）It is connected to master
Spool（5）Cartridge cover（7）On, the cartridge cover（7）It is fixed on main valve plug（5）On inner wall.
5. a kind of subcritical steam converter valve as claimed in claim 4, which is characterized in that the elastic component（10）For spring,
Spring passes through a spring capping（11）With locating piece（30）It is inconsistent.
6. a kind of subcritical steam converter valve as claimed in claim 5, which is characterized in that the pilot valve（6）Including energy
Enough block flow aperture（51）Stopper（61）And and valve rod（29）The interconnecting piece being fixedly connected（62）, the stopper（61）Position
In cartridge cover（7）Side, and and cartridge cover（7）End be separated by a certain distance.
7. a kind of subcritical steam converter valve as claimed in any one of claims 1 to 6, which is characterized in that the valve body（1）If
Have into vapour chamber, steam output chamber, described to be arranged into vapour chamber and steam output chamber transverse and longitudinal, the valve seat（3）It is bolted in the steam output chamber end.
8. a kind of subcritical steam converter valve as claimed in claim 7, which is characterized in that the steam output chamber with into vapour chamber phase
Adjacent end sidewalls are fixedly connected with a valve cup ring（4）, the valve cup ring（4）Open up through-hole, a fastener（35）Across through-hole handle
Valve seat（3）It is fixed on valve body（1）On.
9. a kind of subcritical steam converter valve as claimed in claim 8, which is characterized in that the valve seat（3）Connect a valve cage
（9）, valve cage（9）Upper end and valve deck（12）It is spirally connected, lower end and valve seat（3）It positions but axial displacement is without constraint, the valve cage（9）Side
Several admission openings are arranged in wall.
10. a kind of subcritical steam converter valve as claimed in claim 9, which is characterized in that the valve body（1）Pass through pendant collet
（14）, sealing ring（13）With valve deck（12）It is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820040614.6U CN207715785U (en) | 2018-01-10 | 2018-01-10 | A kind of subcritical steam converter valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820040614.6U CN207715785U (en) | 2018-01-10 | 2018-01-10 | A kind of subcritical steam converter valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207715785U true CN207715785U (en) | 2018-08-10 |
Family
ID=63055375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820040614.6U Active CN207715785U (en) | 2018-01-10 | 2018-01-10 | A kind of subcritical steam converter valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207715785U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984207A (en) * | 2021-04-09 | 2021-06-18 | 艾肯（江苏）工业技术有限公司 | Pressure reducing valve |
| CN114251513A (en) * | 2021-12-24 | 2022-03-29 | 江苏大学 | Pressure reducing valve |
-
2018
- 2018-01-10 CN CN201820040614.6U patent/CN207715785U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984207A (en) * | 2021-04-09 | 2021-06-18 | 艾肯（江苏）工业技术有限公司 | Pressure reducing valve |
| CN114251513A (en) * | 2021-12-24 | 2022-03-29 | 江苏大学 | Pressure reducing valve |
| CN114251513B (en) * | 2021-12-24 | 2024-04-09 | 苏州阀医生流体控制技术有限公司 | Pressure reducing valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 311115 No. 7 Xiuyan Road, Fengdu Village, Pingyao Town, Yuhang District, Hangzhou City, Zhejiang Province Patentee after: Zhejiang Dongchen Valve Technology Co., Ltd. Address before: 311115 No. 7 Xiuyan Road, Fengdu Village, Pingyao Town, Yuhang District, Hangzhou City, Zhejiang Province Patentee before: Hangzhou Dongchen Heating Power Auxiliary Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |