CN110118267A - A kind of fixation device and method precisely installed for valve seat - Google Patents
A kind of fixation device and method precisely installed for valve seat Download PDFInfo
- Publication number
- CN110118267A CN110118267A CN201910542343.3A CN201910542343A CN110118267A CN 110118267 A CN110118267 A CN 110118267A CN 201910542343 A CN201910542343 A CN 201910542343A CN 110118267 A CN110118267 A CN 110118267A
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- Prior art keywords
- valve seat
- fixing piece
- valve
- valve body
- threaded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000009434 installation Methods 0.000 claims description 31
- 238000007789 sealing Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0626—Easy mounting or dismounting means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve Housings (AREA)
Abstract
A kind of fixation device and method precisely installed for valve seat, belongs to valve seat mounting technique field.Fixation device of the invention includes mutually matched first fixing piece of multiple groups and the second fixing piece, first fixing piece successively includes the first threaded joints, the axis of elongation and the first operation portion for connecting valve body threaded hole, and one end that the first threaded joints connect the axis of elongation is equipped with the first connected unit；Second fixing piece includes the second threaded joints for connecting valve body threaded hole and valve seat threaded hole simultaneously, the second operation portion, and second fixing piece be equipped with cooperation the axis of elongation central through hole, second threaded joints are equipped with the second connected unit of the first connected unit of cooperation far from one end of the second operation portion, and the first threaded joints are identical as the outer diameter of the second threaded joints.Heavy caliber valve seat can effectively, accurately be installed on valve body under vertical state, ensure that the sealing performance and its high reliability of valve seat by the present invention.
Description
Technical field
The present invention relates to valve seat mounting technique field more particularly to a kind of fixation device precisely installed for valve seat and sides
Method.
Background technique
The power station AP1000 PRHR HX(passive residual heat removal heat exchanger) it is located in IRWST(containment the water that reloads
Container) in, pipe side maintains RCS(reactor coolant loop) under pressure, it is full of cryogenic coolant, under accident conditions,
Passive residual heat removal heat exchanger flow control valve is opened, and realizes security function.During normal operation at the flow control valve
In closed position, if valve generates interior leakage and will lead to refuelling water storage tank temperature raising in containment, leakage rate is excessive to be will lead to
Power plant's shutdown.
Passive residual heat removal heat exchanger flow control valve valve body is C type ball valve, and valve seal grade is Class
V, therefore very high requirement is proposed to the installation quality of valve all parts, the valve seat installation for especially influencing sealing is assembly
The key point for needing to pay special attention in the process.The valve is the heavy caliber c-type ball valve being horizontally mounted, and valve seat is vertically installed at
On valve body, valve is excessive designed for the gap between the guide surface that valve seat is fixed on valve body and valve seat outer ring, Wu Fashi
Existing positioning action, therefore the precise positioning of valve seat can only guarantee by valve seat fastening bolt.Under actual conditions, valve seat fastens spiral shell
The neck portion design of bolt has smooth bar part, easily occurs what valve seat slid from the smooth bar part of bolt in the final stage of actually dress assembly
Phenomenon causes valve seat to repeat to assemble.Therefore, the installation of valve seat has the level of skill, operating experience, field conditions etc. of personnel
More serious test.And the valve is in nuclear island primary Ioops system, the dosage rate under disintegration state in pipeline is very high.Knot
The design for closing valve itself considers insufficient and considers live physical condition, needs design, production for valve seat precise positioning, installation
Device improves the accuracy rate and precision of assembly, guarantees the leakproofness of valve, under the premise of ensuring quality and safety, realizes valve
The efficient, lean and correct assembly of seat to reduce personal radiation dose, unit safety and reliably run it is most important.
Summary of the invention
The purpose of the present invention is to solve the above-mentioned problems of the prior art, provide one kind and precisely install for valve seat
Fixation device and method, can under vertical state, effectively, accurately be installed on valve body by heavy caliber valve seat, thus
Ensure the sealing performance and its high reliability of valve seat.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of fixation device precisely installed for valve seat, including mutually matched first fixing piece of multiple groups and the second fixing piece,
First fixing piece successively includes the first threaded joints, the axis of elongation and the first operation portion for connecting valve body threaded hole, described
One end that first threaded joints connect the axis of elongation is equipped with the first connected unit；Second fixing piece includes connection valve simultaneously
Second threaded joints of body threaded hole and valve seat threaded hole, the second operation portion, and second fixing piece is equipped with described in cooperation
The central through hole of the axis of elongation, second threaded joints are equipped with far from one end of second operation portion cooperates described first to connect
The second consecutive connected unit, first threaded joints are identical as the outer diameter of the second threaded joints.
The use principle of this fixation device: multiple first fixing pieces are first installed on valve body by its first threaded joints
Multiple threaded holes in, then valve seat is installed to valve body, the axis of elongation of the first fixing piece passes through the threaded hole of valve seat just,
Then by the axis of elongation of the second fixing piece set to the first fixing piece, and by its second threaded joints successively screw in valve seat and
Valve body completes the positioning of valve seat and valve body until the first connected unit is fitted closely with the second connected unit at this time, subsequent again by valve seat
Fastening bolt screws in other threaded holes, finally dismantles the first fixing piece and the second fixing piece, and in the threaded hole after its disassembly
Valve seat fastening bolt is screwed in, the accurate installation of valve seat is completed.The present apparatus has not only acted as accurate centering between valve seat and valve body
Effect, simultaneously because valve seat is in a vertical state, also acts the load-bearing effect to valve seat, it is avoided to occur due to gravity partially
Oblique situation.In addition, at least needing such as to be respectively arranged on using 3 groups of fixing pieces in order to ensure the Stability and veracity of positioning
At 0 °, 120 °, 240 °, i.e., at three trisection points of just upper, lower-left and bottom right, or 4 groups of fixing pieces is used, be such as respectively arranged on
At 0 °, 90 °, 180 °, 270 °, i.e., it is just upper, just under, it is just left and it is positive it is right everywhere.It can also be by measuring come into one in installation process
Step ensures to neutrality, and is adjusted by modes such as addition gaskets.
Preferably as the present invention, first connected unit and the second connected unit have the tapered surface matched.The structure
Can more ensure between the first fixing piece and the second fixing piece to neutrality, so that it is guaranteed that valve seat and valve body to neutral and installation
Accuracy.
The present invention also provides a kind of methods precisely installed for valve seat, are precisely installed using valve seat is used for as described above
Fixation device, include the following steps:
Step 1, by four the first fixing pieces be separately mounted to valve body it is just upper, just under, in just left and positive right four threaded holes；
Step 2, valve seat is installed to valve body, and the merging adjustment gasket between the lowest part and valve body of valve seat；
Step 3, measure respectively in valve seat outer rim and valve body it is just upper between valve seat installation pilot hole side wall, just under, the just left and positive right side
The gap at place, it is ensured that gap is identical everywhere, if any deviation, then by merging adjustment gasket come equilibrium gap difference；
Step 4, four the second fixing pieces are respectively sleeved on the first fixing piece, and are mounted on four threaded holes of valve body and valve seat
It is interior；
Step 5, it is in turn mounted on valve seat and valve body in remaining threaded hole using valve seat fastening bolt；
Step 6, four group of first fixing piece and the second fixing piece are successively removed, and valve seat is installed in respective screw hole and fastens spiral shell
Bolt；
Step 7, all valve seat fastening bolts are fastened to regulation moment values.
Preferred as the present invention, the adjustment gasket installs pilot hole internal diameter with a thickness of valve seat in valve seat outer diameter and valve body
Between difference half.
Preferably as the present invention, before the step 1 further include: used to all threaded holes on valve body and/or valve seat
The mode of crossing method is numbered and makes marks, at the same in it is just upper, just under, the spiral shell on just left, positive right four positions
Pit heavy label.The mode of the right-angled intersection i.e. with four threaded holes for one group, between every group of four threaded holes between
Every 90 °, and according to number order, every two threaded hole is in positive opposite side, with reference to Fig. 3.By numbering so that subsequent installation
The operation of fixing piece or valve seat fastening bolt is more quick, at the same according to the sequence of right-angled intersection installation more can ensure that valve seat by
Power uniformity is conducive to improve installation accuracy.And mark, that is, mounting fixing parts position emphatically, indicative stronger, installation is not
It is error-prone.
As it is of the invention preferably, when first fixing piece and the second fixing piece be installed according to threaded hole number order into
Row.As described above, this kind of mounting means and sequence are faster, it is more efficient, while can ensure that the uniform force of valve seat, it is conducive to
Improve installation accuracy.
Preferably as the present invention, it is carried out when the valve seat fastening bolt is installed according to threaded hole number order.Similarly, this kind
Mounting means and sequence are faster, more efficient, while can ensure that the uniform force of valve seat, are conducive to improve installation accuracy.
Preferably as the present invention, according to threaded hole number order when all valve seat fastening bolts are fastened to regulation moment values
It carries out.Similarly, this kind of fastening means and sequence are faster, more efficient, while can ensure that the uniform force of valve seat, conducive to mentioning
Height installation accuracy.
Preferably as the present invention, between the step 4 and step 5 further include: take out all adjustment gaskets.Precise positioning
Afterwards, adjustment gasket can take out, and impact to avoid the normal use to valve.
Preferably as the present invention, after the step 7 further include: measure valve seat mounting hole in valve seat outer rim and valve body again
It is just upper between side wall, just under, the gap at just left and just right place carry out subsequent valve installation operation if gap is identical everywhere.It should
Step aims to ensure that the accuracy of installation, if needed since operation error or other factors result in the generation of error
It is adjusted or reinstalls, avoid impacting valve tightness.
The invention has the advantages that
1, it overcomes under heavy caliber valve seat vertical state since valve seat self gravity leads to this installation problem of deflection easily occur；
2, by valve seat precise positioning on valve body, and high accurancy and precision is further ensured that by way of clearance measurement；
3, valve seat is fixedly secured on valve body before and after being fastened, and guarantees the effect of valve seat fastening and the leakproofness of valve.
4, compared to traditional installation, fastening means, this method is more safe, effective and reliable.
Detailed description of the invention
Fig. 1 is the mounting structure schematic diagram of the fixed device of the present invention；
Fig. 2 is the structural schematic diagram after valve seat is installed；
Fig. 3 is the schematic diagram of valve seat upper screwed hole numbering.
The first fixing piece of 1-；The second fixing piece of 2-；3- valve body；4- valve seat；5- valve seat fastening bolt；6- adjusts gasket.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
A kind of fixation device precisely installed for valve seat, including mutually matched first fixing piece 1 and second of multiple groups are solid
Determine part 2, first fixing piece successively includes the first threaded joints for connecting 3 threaded hole of valve body, the axis of elongation and the first operation
Portion, one end that first threaded joints connect the axis of elongation are equipped with the first connected unit；Second fixing piece includes same
When connection 3 threaded hole of valve body and 4 threaded hole of valve seat the second threaded joints, the second operation portion, and second fixing piece is set
There is the central through hole for cooperating the axis of elongation, second threaded joints are equipped with cooperation far from one end of second operation portion
Second connected unit of first connected unit, first threaded joints are identical as the outer diameter of the second threaded joints.It is described
First connected unit and the second connected unit have the tapered surface matched.
It uses principle: multiple first fixing pieces is first installed on to multiple threaded holes of valve body by its first threaded joints
It is interior, then valve seat is installed to valve body, the axis of elongation of the first fixing piece passes through the threaded hole of valve seat just, then consolidates second
Determine on part set to the axis of elongation of the first fixing piece, and successively screws in valve seat and valve body by its second threaded joints, until the
The tapered surface of one connected unit and the second connected unit fits closely, and completes the positioning of valve seat and valve body at this time, subsequent again that valve seat is tight
Fixing bolt screws in other threaded holes, finally dismantles the first fixing piece and the second fixing piece, and the threaded hole inward turning after its disassembly
Enter valve seat fastening bolt, completes the accurate installation of valve seat.The present apparatus has not only acted as the work of accurate centering between valve seat and valve body
With also acting the load-bearing effect to valve seat, it avoided deflection occur due to gravity simultaneously because valve seat is in a vertical state
The case where.In addition, in order to ensure the Stability and veracity of positioning, at least need using 3 groups of fixing pieces, be such as respectively arranged on 0 °,
At 120 °, 240 °, i.e., at three trisection points of just upper, lower-left and bottom right, or use 4 groups of fixing pieces, be such as respectively arranged on 0 °,
At 90 °, 180 °, 270 °, i.e., it is just upper, just under, it is just left and it is positive it is right everywhere.It can also be by measuring come further true in installation process
It protects to neutrality, and is adjusted by modes such as addition gaskets.
The present invention also provides a kind of methods precisely installed for valve seat, are precisely installed using valve seat is used for as described above
Fixation device, include the following steps:
Step 1, by four the first fixing pieces 1 be separately mounted to valve body 3 it is just upper, just under, in just left and positive right four threaded holes；
Step 2, valve seat 4 is installed to valve body 3, and the merging adjustment gasket 6 between the lowest part and valve body of valve seat 4；It is described
Adjust the half with a thickness of the difference in 4 outer diameter of valve seat and valve body 3 between valve seat installation pilot hole internal diameter of gasket 6；
Step 3, measure respectively in 4 outer rim of valve seat and valve body 3 it is just upper between valve seat installation pilot hole side wall, just under, it is positive left and just
The gap at right place, it is ensured that gap is identical everywhere, if any deviation, then by merging adjustment gasket 6 come equilibrium gap difference；
Step 4, four the second fixing pieces 2 are respectively sleeved on the first fixing piece 1, and are mounted on four spiral shells of valve body 3 and valve seat 4
In pit；
Step 5, it is in turn mounted on valve seat 4 and valve body 3 in remaining threaded hole using valve seat fastening bolt 5；
Step 6, four group of first fixing piece 1 and the second fixing piece 2 are successively removed, and valve seat fastening is installed in respective screw hole
Bolt 5；
Step 7, all valve seat fastening bolts 5 are fastened to regulation moment values.
Specifically, all threaded holes on valve body and/or valve seat are numbered and are done by the way of crossing method
Label, at the same in it is just upper, just under, threaded hole on just left, positive right four positions heavy label.Certainly, if only to valve
Threaded hole on body is numbered and is made marks, and needs to guarantee that the valve seat after the label is not mounted blocks.The right-angled intersection
Mode is spaced 90 °, and according to number order, every two i.e. with four threaded holes for one group between every group of four threaded holes
Threaded hole is in positive opposite side, with reference to Fig. 3, by taking the valve body of 16 threaded holes as an example.By numbering so that subsequent mounting fixing parts
Or the operation of valve seat fastening bolt is more quick, while more can ensure that the uniform force of valve seat according to the installation of the sequence of right-angled intersection
Property, it is conducive to improve installation accuracy.And mark (number 1-4 in Fig. 3) the i.e. position of mounting fixing parts emphatically, it is indicative more
By force, it installs not easy to make mistakes.
As described above, when installation first fixing piece and the second fixing piece, and install and fasten the valve seat fastening
When bolt, carried out according to threaded hole number order.It to improve installation effectiveness, while can ensure that the uniform force of valve seat, mention
Height installation accuracy.
In addition, between the step 4 and step 5 further include: take out all adjustment gaskets.After precise positioning, adjusting pad
Piece can be taken off, and impact to avoid the normal use to valve.
Finally, after the step 7 further include: measure in valve seat outer rim and valve body again between valve seat mounting hole side wall just
It is upper, just under, the gap at just left and just right place carry out subsequent valve installation operation if gap is identical everywhere.The step is intended to really
Ensure public security dress accuracy, if since operation error or other factors result in the generation of error, need to be adjusted or
It reinstalls, avoids impacting valve tightness.
The foregoing is only a preferred embodiment of the present invention, the specific embodiment is whole based on the present invention
A kind of implementation under design, and scope of protection of the present invention is not limited thereto, any skill for being familiar with the art
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by art personnel, should all cover in protection of the invention
Within the scope of.Therefore, the scope of protection of the invention shall be subject to the scope of protection specified in the patent claim.
Claims (10)
1. a kind of fixation device precisely installed for valve seat, which is characterized in that including mutually matched first fixing piece of multiple groups
With the second fixing piece, first fixing piece successively includes connecting the first threaded joints of valve body threaded hole, the axis of elongation and the
One operation portion, one end that first threaded joints connect the axis of elongation are equipped with the first connected unit；Second fixing piece
The second threaded joints, the second operation portion including connecting valve body threaded hole and valve seat threaded hole simultaneously, and described second is fixed
Part is equipped with the central through hole for cooperating the axis of elongation, and second threaded joints are equipped with far from one end of second operation portion
Cooperate the second connected unit of first connected unit, first threaded joints are identical as the outer diameter of the second threaded joints.
2. the fixation device according to claim 1 precisely installed for valve seat, which is characterized in that first connected unit
There is the tapered surface matched with the second connected unit.
3. a kind of method precisely installed for valve seat, which is characterized in that using accurate for valve seat as described in claim 1
The fixation device of installation, includes the following steps:
Step 1, by four the first fixing pieces be separately mounted to valve body it is just upper, just under, in just left and positive right four threaded holes；
Step 2, valve seat is installed to valve body, and the merging adjustment gasket between the lowest part and valve body of valve seat；
Step 3, measure respectively in valve seat outer rim and valve body it is just upper between valve seat installation pilot hole side wall, just under, the just left and positive right side
The gap at place, it is ensured that gap is identical everywhere, if any deviation, then by merging adjustment gasket come equilibrium gap difference；
Step 4, four the second fixing pieces are respectively sleeved on the first fixing piece, and are mounted on four threaded holes of valve body and valve seat
It is interior；
Step 5, it is in turn mounted on valve seat and valve body in remaining threaded hole using valve seat fastening bolt；
Step 6, four group of first fixing piece and the second fixing piece are successively removed, and valve seat is installed in respective screw hole and fastens spiral shell
Bolt；
Step 7, all valve seat fastening bolts are fastened to regulation moment values.
4. the method according to claim 3 precisely installed for valve seat, which is characterized in that the thickness of the adjustment gasket
The half of difference between pilot hole internal diameter is installed for valve seat in valve seat outer diameter and valve body.
5. the method according to claim 3 precisely installed for valve seat, which is characterized in that also wrapped before the step 1
It includes: all threaded holes on valve body and/or valve seat being numbered and made marks by the way of crossing method, while to place
In it is just upper, just under, threaded hole on just left, positive right four positions heavy label.
6. the method according to claim 5 precisely installed for valve seat, which is characterized in that installation first fixing piece
With when the second fixing piece according to threaded hole number order carry out.
7. the method according to claim 5 precisely installed for valve seat, which is characterized in that install the valve seat fastening spiral shell
It is carried out when bolt according to threaded hole number order.
8. the method according to claim 3 precisely installed for valve seat, which is characterized in that by all valve seat fastening bolts
It is carried out when being fastened to regulation moment values according to threaded hole number order.
9. the method according to claim 3 precisely installed for valve seat, which is characterized in that the step 4 and step 5 it
Between further include: all adjustment gaskets are taken out.
10. the method according to claim 3 precisely installed for valve seat, which is characterized in that also wrapped after the step 7
Include: measure again in valve seat outer rim and valve body it is just upper between valve seat mounting hole side wall, just under, the gap at just left and just right place, if
Gap is identical everywhere, then carries out subsequent valve installation operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910542343.3A CN110118267B (en) | 2019-06-21 | 2019-06-21 | Fixing device and method for precisely installing valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910542343.3A CN110118267B (en) | 2019-06-21 | 2019-06-21 | Fixing device and method for precisely installing valve seat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110118267A true CN110118267A (en) | 2019-08-13 |
| CN110118267B CN110118267B (en) | 2024-02-27 |
Family
ID=67524352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910542343.3A Active CN110118267B (en) | 2019-06-21 | 2019-06-21 | Fixing device and method for precisely installing valve seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110118267B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110970328A (en) * | 2019-11-18 | 2020-04-07 | 长江存储科技有限责任公司 | Sealing ring installation jig and installation method |
| CN112719826A (en) * | 2020-12-03 | 2021-04-30 | 中广核核电运营有限公司 | Butterfly valve clack dismounting device and method |
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|---|---|---|---|---|
| KR100631756B1 (en) * | 2005-04-11 | 2006-10-12 | 전병규 | Virtual assembling machine of rivet bolt |
| CN202091608U (en) * | 2010-12-31 | 2011-12-28 | 深圳深爱半导体股份有限公司 | Pneumatic water valve |
| CN105465401A (en) * | 2015-12-31 | 2016-04-06 | 宁波丰基特种阀门有限公司 | Ball valve easy to replace valve seat |
| CN210141335U (en) * | 2019-06-21 | 2020-03-13 | 三门核电有限公司 | Fixing device for accurate installation of valve seat |
-
2019
- 2019-06-21 CN CN201910542343.3A patent/CN110118267B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100631756B1 (en) * | 2005-04-11 | 2006-10-12 | 전병규 | Virtual assembling machine of rivet bolt |
| CN202091608U (en) * | 2010-12-31 | 2011-12-28 | 深圳深爱半导体股份有限公司 | Pneumatic water valve |
| CN105465401A (en) * | 2015-12-31 | 2016-04-06 | 宁波丰基特种阀门有限公司 | Ball valve easy to replace valve seat |
| CN210141335U (en) * | 2019-06-21 | 2020-03-13 | 三门核电有限公司 | Fixing device for accurate installation of valve seat |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110970328A (en) * | 2019-11-18 | 2020-04-07 | 长江存储科技有限责任公司 | Sealing ring installation jig and installation method |
| CN110970328B (en) * | 2019-11-18 | 2022-06-07 | 长江存储科技有限责任公司 | Sealing ring installation jig and installation method |
| CN112719826A (en) * | 2020-12-03 | 2021-04-30 | 中广核核电运营有限公司 | Butterfly valve clack dismounting device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110118267B (en) | 2024-02-27 |
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