CN108975164A - A kind of positioning tool and hanging method can be improved valve body hoisting safety - Google Patents
A kind of positioning tool and hanging method can be improved valve body hoisting safety Download PDFInfo
- Publication number
- CN108975164A CN108975164A CN201810912160.1A CN201810912160A CN108975164A CN 108975164 A CN108975164 A CN 108975164A CN 201810912160 A CN201810912160 A CN 201810912160A CN 108975164 A CN108975164 A CN 108975164A
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- China
- Prior art keywords
- valve body
- positioning tool
- plane
- floral disc
- positioning
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- 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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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve Housings (AREA)
Abstract
The invention discloses a kind of positioning tools and hanging method that can be improved valve body hoisting safety, are related to valve body positioning tool field.Aim to solve the problem that lifting valve body by magnetic force suspender or lateral strong holding device there are problems that compared with high safety hidden danger when processing using traditional positioning tool to valve body.Its drip irrigation device includes: floral disc plate；Several plane positioning blocks of the floral disc plate are carried on, several plane positioning blocks are uniformly arranged along floral disc plate circumferencial direction, and are in gap setting between the adjacent plane positioning block；And it is carried on the center bridge of the plane positioning block, the centering cambered surface being engaged with valve body inner sidewall is provided on the center bridge.Using positioning tool of the invention, suspender belt can be used, valve body is lifted, so as to improve the security and stability of valve body lifting, reduces security risk.
Description
Technical field
The present invention relates to valve body positioning tool fields, more specifically, it relates to which one kind can be improved valve body Hoisting Security
The positioning tool and hanging method of property.
Background technique
Valve body is a main parts size in valve.
Referring to Figures 1 and 2, in cylindrical tube shape before valve body 1 is processed, man-hour requirement is added to connect by positioning tool with lathe.
Existing positioning tool includes fixed bottom plate 23, and positioning tool passes through fixed bottom plate 23 and connect with lathe；It is set on fixed bottom plate 23
It is equipped with fixed supported slab 21, fixed core plate 22 is provided on fixed supported slab 21；When valve body 1 is connect with positioning tool, it is set in solid
Determine on core plate 22, and end wall is contacted with fixed supported slab 21, fixed core plate 22 plays positioning action to valve body 1.
Since it is desired that valve body 1 is set on fixed core plate 22, thus existing hanging method be by magnetic force suspender or
Valve body 1 is lifted on positioning tool by person's transverse direction strong holding device, without using suspender belt, because being lifted valve body 1 using suspender belt
Onto positioning tool, suspender belt can not be detached.
But the weight of valve body 1 is big, lifts valve body 1 there are security risk by magnetic force suspender or lateral strong holding device,
Often there is the case where valve body 1 falls off, jeopardize product quality and personnel safety, this problems demand solves.
Summary of the invention
In view of the deficienciess of the prior art, one of the objects of the present invention is to provide one kind can be improved valve body lifting peace
The positioning tool of full property, has the advantage that can be improved valve body Hoisting Security stability.
To achieve the above object, the present invention provides the following technical scheme that
A kind of positioning tool can be improved valve body hoisting safety, comprising:
Floral disc plate；
Several plane positioning blocks of the floral disc plate are carried on, several plane positioning blocks are equal along floral disc plate circumferencial direction
Cloth setting, and be in gap setting between the adjacent plane positioning block；And
It is carried on the center bridge of the plane positioning block, is provided with the centering being engaged with valve body inner sidewall on the center bridge
Cambered surface.
By using above-mentioned technical proposal, after valve body is connect with positioning tool, bottom wall is contacted with plane positioning block, centering
Centering cambered surface on block is contacted with valve body inner sidewall, then several center bridges play positioning action to valve body；Adjacent plane locating piece
Between there are gaps, then apply positioning tool of the invention, valve body can be lifted using suspender belt, by valve body and positioning work
After load connects, by the gap between adjacent plane locating piece, it can be convenient and detach suspender belt；With existing positioning tool phase
Than positioning tool of the invention can lift valve body using suspender belt, so as to improve the safety and stability of valve body lifting
Property.
Further, the rounded setting in the centering cambered surface top edges and corners.
By using above-mentioned technical proposal, the rounded setting in cambered surface top edges and corners of feeling relieved can facilitate and be arranged valve body
On several center bridges, so that centering cambered surface be made to contact with valve body inner sidewall.
Further, the limit plectane being provided on the floral disc plate among several plane positioning blocks, institute
The height for stating limit plectane is lower than the height of plane positioning block；It is offered on the limit plectane and plane positioning block end inlay card
The limiting slot of cooperation.
By using above-mentioned technical proposal, the limiting slot inlay card on the end and limit plectane of plane positioning block cooperates, energy
The position precision of plane positioning block is improved, enough so as to guarantee that the centering cambered surface on center bridge and valve body inner sidewall closely paste
It closes；The height for limiting plectane is lower than the height of plane positioning block, then will not influence and detach suspender belt, hang so as to improve valve body
The security and stability of dress.
Further, the end that the plane positioning block is contacted with limit plectane is in halfpace type.
By using above-mentioned technical proposal, the end of plane positioning block is in halfpace type, on the one hand can facilitate and determine plane
In position block end insertion limiting slot, it is on the other hand capable of increasing the gap between adjacent plane locating piece, to facilitate suspender belt
It detaches.
Further, the center bridge is set as being detachably connected with plane positioning block.
By using above-mentioned technical proposal, center bridge is set as being detachably connected with plane positioning block, can facilitate to fixed
Heart block is replaced or is overhauled.
Further, the first bolt and the first pin connecting with plane positioning block are equipped on the center bridge；Institute
State the first threaded hole offered on plane positioning block with the cooperation of the first bolt, and the first pin hole with the cooperation of the first pin.
By using above-mentioned technical proposal, the first bolt is connect with the first threaded hole, can be facilitated center bridge and plane
Locating piece is installed or is separated；First pin and the first pin hole cooperate, and play position-limiting action to center bridge, guarantee the position of center bridge
Precision is set, so that centering cambered surface be made to contact with the cooperation of valve body inner sidewall；The first pin and the first pin hole cooperate simultaneously, can be improved
The stability that center bridge is connect with plane positioning block.
Further, several first threaded holes and the first pin hole, the centering are uniformly offered on the plane positioning block
Cambered surface is set in parallel when being located at different location on plane positioning block.
By using above-mentioned technical proposal, several first threaded holes and the first pin hole are set on plane positioning block, it can
Position of the center bridge on plane positioning block is adjusted, and when cambered surface of feeling relieved is located at different location is set in parallel, so as to
The valve body for adapting to different inner diameters specification, increases the use scope of positioning tool, saves the production cost of enterprise.
Further, it is provided with and holds down assembly on the floral disc plate, described hold down assembly includes:
Pressing plate, the length of the pressing plate are greater than the outer diameter of valve body；
Across the clamping screw of the pressing plate, the bottom end of the clamping screw is to be threadedly coupled with floral disc plate；And
Rotation is set to the clamp nut on the clamping screw, and the clamp nut can be contacted with pressing plate roof.
By using above-mentioned technical proposal, after valve body is contacted with plane positioning block, pressing plate is contacted with valve body roof, then
Clamping screw is passed through into pressing plate and is threadedly coupled with floral disc plate, clamp nut is then screwed, pastes it closely with pressing plate roof
It closes, so as to be bonded valve body with positioning tool, and then conveniently valve body is processed.
Further, several flexible cushion blocks are provided between the pressing plate and valve body.
It is provided with flexible cushion block by using above-mentioned technical proposal, between pressing plate and valve body, pressing plate can be prevented in valve body
Impression is caused on surface, influences the surface quality of valve body.
Another object of the present invention is to provide a kind of using the above-mentioned positioning tool that can be improved valve body hoisting safety
Hanging method, there is the advantage of valve body hoisting safety of can be improved.
To achieve the above object, the present invention provides the following technical scheme that
A kind of hanging method using the above-mentioned positioning tool that can be improved valve body hoisting safety, comprising the following steps:
Positioning tool is lifted on lathe；
Valve body is lifted on positioning tool by suspender belt, makes suspender belt between adjacent plane locating piece, then removes suspender belt.
By using above-mentioned technical proposal, suspender belt is passed through into valve body, then connect suspender belt with the suspension hook on crane
Valve body is lifted on positioning tool with security and stability, detaches suspender belt after the completion of lifting；Existing hanging method uses
Magnetic force suspender, magnetic force suspender and valve body are face contacts, and in contrast, the present invention lifts valve body using suspender belt, so as to
Enough improve the security and stability of valve body lifting.
In conclusion the invention has the following advantages:
1, using is in gap setting between adjacent plane locating piece, so as to use suspender belt to lift valve body, in turn
It can be improved the security and stability of valve body lifting；
2, it using the relative position that can adjust center bridge Yu plane positioning block, is advised to generate and can be suitable for different inner diameters
The effect of lattice valve body；
3, valve body is lifted using by suspender belt, to generate the effect that can be improved valve body Hoisting Security stability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of valve body in background technique；
Fig. 2 is the structural schematic diagram of positioning tool in background technique；
Fig. 3 is a kind of structural schematic diagram for the positioning tool that can be improved valve body hoisting safety in embodiment 1；
Fig. 4 is the structural schematic diagram of plane positioning block and center bridge in embodiment 1；
Fig. 5 is the structural schematic diagram that plectane and plane positioning block are limited in embodiment 1；
Fig. 6 shows for the positioning tool that can be improved valve body hoisting safety a kind of in embodiment 1 and the structure of valve body connection status
It is intended to.
In figure: 1, valve body；21, fixed supported slab；22, fixed core plate；23, fixed bottom plate；3, floral disc plate；31, strip groove；
32, annular groove；4, plane positioning block；41, the second bolt；42, the second pin hole；43, the second pin；44, the first threaded hole；45,
One pin hole；5, center bridge；51, centering cambered surface；52, the first bolt；53, the first pin；6, plectane is limited；61, limiting slot；62,
Screwed hole of centre；63, third bolt；71, pressing plate；72, clamping screw；73, clamp nut；74, flexible cushion block；81, spiral shell is fastened
Bolt；82, backing plate is fastened.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Embodiment 1:
A kind of positioning tool can be improved valve body hoisting safety, referring to Fig. 3 comprising floral disc plate 3, floral disc plate 3 are in
Cylindrical type；Plane positioning block 4 there are four being uniformly arranged on floral disc plate 3, four plane positioning blocks 4 are along 3 circumference side of floral disc plate
To being uniformly arranged；It is in gap setting between adjacent plane locating piece 4, detaches suspender belt so as to facilitate.
Referring to Fig. 3, several strip grooves 31, strip groove 31, one side are uniformly offered along its circumferencial direction on floral disc plate 3
The chip of cutting fluid and generation in process can be facilitated to be discharged from floral disc plate 3, on the other hand can facilitate by
Floral disc plate 3 is connect with lathe；Clamping bolt 81 is equipped in the present embodiment in strip groove 31, be arranged on clamping bolt 81 with
Clamping bolt 81, then connect with lathe and screw by the fastening backing plate 82 of 3 roof of floral disc plate contact, can by floral disc plate 3 and
Lathe connection；Several annular grooves 32 being arranged concentrically are additionally provided on floral disc plate 3, annular groove 32 can facilitate 3 surface of floral disc plate
Cutting fluid discharge.
Referring to Fig. 4, plane positioning block 4 and floral disc plate 3(are connected referring to Fig. 3) by four the second bolts 41 in the present embodiment
It connects, plane positioning block 4 is replaced or overhauled so as to convenient；Four second pins are also provided on plane positioning block 4
Hole 42, the second pin 43 with the cooperation of the second pin hole 42 is embedded on floral disc plate 3, and the second pin 43 is matched with the second pin hole 42
It closes, can be improved the position precision of plane positioning block 4；The rounded setting in second pin, 43 end in the present embodiment, so as to
Facilitate and the second pin 43 is embedded in the second pin hole 42.
Referring to Fig. 4, it is provided with center bridge 5 on plane positioning block 4, centering cambered surface 51 is provided on center bridge 5, cambered surface of feeling relieved
51 and valve body 1(is referring to Fig.1) inner sidewall cooperation, then four center bridges 5 can play positioning action to valve body 1；Centering cambered surface 51
Rounded setting at the seamed edge of top contacts so as to side's centering cambered surface 51 with the cooperation of 1 inner sidewall of valve body.
Referring to Fig. 4, the first bolt 52 being threadedly coupled with plane positioning block 4, plane positioning block 4 are equipped on center bridge 5
On offer with the first bolt 52 cooperation the first threaded hole 44, the first bolt 52 and the first threaded hole 44 cooperation, can facilitate
Center bridge 5 is replaced or overhauled；First bolt 52 there are two being worn on center bridge 5 in the present embodiment, so as to mention
The stability that high center bridge 5 is connect with plane positioning block 4.
It referring to Fig. 4, is embedded on center bridge 5 there are four the first pin 53, is offered and the first pin 53 on plane positioning block 4
First pin hole 45 of cooperation, 52 two sides of the first bolt are symmetrical arranged that there are two the first pins 53 in the present embodiment；First pin
Column 53 and the first pin hole 45 cooperate, and on the one hand can be improved the position precision of center bridge 5, to make feel relieved cambered surface 51 and valve body 1
(referring to Fig.1) inner sidewall is engaged, and on the other hand can be improved the stability that center bridge 5 is connect with plane positioning block 4.
It is uniformly arranged that there are three the first threaded hole 44 and six are right on plane positioning block 4 referring to Fig. 4, in the present embodiment
Claim the first pin hole 45 for being set to 44 two sides of the first threaded hole；By three the first threaded holes 44, center bridge 5 can be adjusted and put down
The relative position of face locating piece 4, and cambered surface 51 of feeling relieved is set in parallel when being located at different location, it is different so as to be suitable for
The valve body 1 of internal diameter specification, increases the use scope of positioning tool.
Referring to Fig. 5, floral disc plate 3(is referring to Fig. 3) on be provided with limit plectane 6, limit plectane 6 and be located at four plane positionings
The axis that plectane 6 is limited among block 4, and in the present embodiment is identical as the axis of floral disc plate 3；Limit plectane 6 and floral disc plate 3
It is connected by eight third bolts 63, so as to facilitate installation or disassembly limit plectane 6.
Referring to Fig. 5, the limiting slot 61 cooperated there are four uniformly opening up on plectane 6 with plane positioning block 4, plane positioning are limited
The end of block 4 is embedded in limiting slot 61, so as to improve the position precision and stability of plane positioning block 4；The present embodiment
The end that middle plane positioning block 4 cooperates with limiting slot 61 is in halfpace type, on the one hand can be facilitated plane positioning block 4 and limiting slot
61 connections, are on the other hand capable of increasing the gap between adjacent plane locating piece 4, detach suspender belt to facilitate；While in order to
It does not influence to detach suspender belt, the height that plectane 6 is limited in the present embodiment is lower than the height of plane positioning block 4.
Referring to Fig. 6, it is provided with and holds down assembly on floral disc plate 3, hold down assembly including pressing plate 71, the length of pressing plate 71 is greater than
The outer diameter of valve body 1；Clamping screw 72 is equipped among pressing plate 71,72 end of clamping screw is to be threadedly coupled with floral disc plate 3, this
Plectane 6(is limited in embodiment referring to Fig. 5) on equally offer screwed hole of centre 62(reference connect with clamping screw 72 and scheme
5), so as to increasing the stability that clamping screw 72 is connect with floral disc plate 3；Pressing plate 71 and plane positioning block in the present embodiment
4 is opposite, so as to improve the stability that valve body 1 is connect with positioning tool.
Referring to Fig. 6, it is installed with clamp nut 73 on clamping screw 72, clamp nut 73 can be with 71 roof of pressing plate after screwing
Contact, so as to fasten valve body 1 and plane positioning block 4；It is symmetrically arranged between pressing plate 71 and valve body 1 in the present embodiment soft
Property cushion block 74 because pressing plate 71 and valve body 1 are all steel, the flexible preferred copper billet of cushion block 74, so as to prevent in valve body 1
Cause impression in surface.
Working principle is as follows:
After valve body 1 is connect with positioning tool, bottom wall is contacted with plane positioning block 4, centering cambered surface 51 and valve body on center bridge 5
The contact of 1 inner sidewall, then four center bridges 5 play positioning action to valve body 1；There are gaps between adjacent plane locating piece 4, then answer
With positioning tool of the invention, valve body 1 can be lifted using suspender belt, after valve body 1 is connect with positioning tool, pass through phase
Gap between adjacent plane positioning block 4, can be convenient and detach suspender belt；Compared with existing positioning tool, positioning of the invention
Tooling can lift valve body 1 using suspender belt, so as to improve the security and stability of the lifting of valve body 1.
Embodiment 2:
A kind of hanging method using the above-mentioned positioning tool that can be improved valve body hoisting safety, comprising the following steps:
Lifting bolt is screwed in the screwed hole of centre of limit plectane, then suspender belt is passed through to the hanging ring of lifting bolt, cooperation is hung
Positioning tool is lifted on lathe by vehicle；
It is each passed through valve body using two suspender belts, cooperates crane, valve body is lifted on positioning tool, and it is adjacent to be located at suspender belt
Between plane positioning block, suspender belt is then removed.
Working principle is as follows:
For existing hanging method using magnetic force suspender or lateral strong holding device, magnetic force suspender and valve body are face contacts, laterally strong
Power fixture and valve body are side force point contacts, and in contrast, the present invention lifts valve body using suspender belt, so as to improve valve
The security and stability of body lifting.
Claims (10)
1. a kind of positioning tool that can be improved valve body hoisting safety, it is characterised in that: include:
Floral disc plate (3)；
Several plane positioning blocks (4) of the floral disc plate (3) are carried on, several plane positioning blocks (4) are along floral disc plate
(3) circumferencial direction is uniformly arranged, and is in gap setting between the adjacent plane positioning block (4)；And
It is carried on the center bridge (5) of the plane positioning block (4), is provided on the center bridge (5) and is connect with valve body (1) inner sidewall
Touch the centering cambered surface (51) of cooperation.
2. the positioning tool according to claim 1 that can be improved valve body hoisting safety, it is characterised in that: the centering
The rounded setting in cambered surface (51) top edges and corners.
3. the positioning tool according to claim 1 that can be improved valve body hoisting safety, it is characterised in that: the floral disc
The limit plectane (6) intermediate positioned at several plane positioning blocks (4), the height of limit plectane (6) are provided on plate (3)
Degree is lower than the height of plane positioning block (4)；It offers on the limit plectane (6) and cooperates with plane positioning block (4) end inlay card
Limiting slot (61).
4. the positioning tool according to claim 3 that can be improved valve body hoisting safety, it is characterised in that: the plane
The end that locating piece (4) is contacted with limit plectane (6) is in halfpace type.
5. it can be improved the positioning tool of valve body hoisting safety in -4 described in any claim according to claim 1,
Be characterized in that: the center bridge (5) is set as being detachably connected with plane positioning block (4).
6. the positioning tool according to claim 5 that can be improved valve body hoisting safety, it is characterised in that: the centering
The first bolt (52) and the first pin (53) connecting with plane positioning block (4) are equipped on block (5)；The plane positioning block
(4) the first threaded hole (44) with the first bolt (52) cooperation, and the first pin with the first pin (53) cooperation are offered on
Hole (45).
7. the positioning tool according to claim 6 that can be improved valve body hoisting safety, it is characterised in that: the plane
Several first threaded holes (44) and the first pin hole (45) are uniformly offered on locating piece (4), the centering cambered surface (51) is located at flat
It is set in parallel when different location on face locating piece (4).
8. it can be improved the positioning tool of valve body hoisting safety in -4 described in any claim according to claim 1,
It is characterized in that: being provided with and hold down assembly on the floral disc plate (3), described hold down assembly includes:
Pressing plate (71), the length of the pressing plate (71) are greater than the outer diameter of valve body (1)；
Clamping screw (72) across the pressing plate (71), the bottom end and floral disc plate (3) of the clamping screw (72) are screw thread
Connection；And
Rotation is set to the clamp nut (73) on the clamping screw (72), and the clamp nut (73) can be with pressing plate (71) roof
Contact.
9. the positioning tool according to claim 8 that can be improved valve body hoisting safety, it is characterised in that: the pressing plate
(71) several flexible cushion blocks (74) are provided between valve body (1).
10. a kind of using the positioning work that can be improved valve body hoisting safety described in any claim in claim 1-4
The hanging method of dress, it is characterised in that: the following steps are included:
Positioning tool is lifted on lathe；
Valve body is lifted on positioning tool by suspender belt, makes suspender belt between adjacent plane locating piece, then removes suspender belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810912160.1A CN108975164A (en) | 2018-08-10 | 2018-08-10 | A kind of positioning tool and hanging method can be improved valve body hoisting safety |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810912160.1A CN108975164A (en) | 2018-08-10 | 2018-08-10 | A kind of positioning tool and hanging method can be improved valve body hoisting safety |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108975164A true CN108975164A (en) | 2018-12-11 |
Family
ID=64552844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810912160.1A Pending CN108975164A (en) | 2018-08-10 | 2018-08-10 | A kind of positioning tool and hanging method can be improved valve body hoisting safety |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108975164A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202292174U (en) * | 2011-09-09 | 2012-07-04 | 索特传动设备有限公司 | Clamping and centering device of ring-shaped workpieces |
| CN203184985U (en) * | 2013-04-22 | 2013-09-11 | 中国北车集团大同电力机车有限责任公司 | Processing and positioning device of hollow shaft sleeve |
| CN206811393U (en) * | 2017-09-13 | 2017-12-29 | 合肥康尔信电力***有限公司 | A kind of flange welding positioning tooling |
-
2018
- 2018-08-10 CN CN201810912160.1A patent/CN108975164A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202292174U (en) * | 2011-09-09 | 2012-07-04 | 索特传动设备有限公司 | Clamping and centering device of ring-shaped workpieces |
| CN203184985U (en) * | 2013-04-22 | 2013-09-11 | 中国北车集团大同电力机车有限责任公司 | Processing and positioning device of hollow shaft sleeve |
| CN206811393U (en) * | 2017-09-13 | 2017-12-29 | 合肥康尔信电力***有限公司 | A kind of flange welding positioning tooling |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| PB01 | Publication | ||
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Application publication date: 20181211 |