CN204171962U - Pneumatic operated valve attaching/detaching apparatus - Google Patents
Pneumatic operated valve attaching/detaching apparatus Download PDFInfo
- Publication number
- CN204171962U CN204171962U CN201420620664.3U CN201420620664U CN204171962U CN 204171962 U CN204171962 U CN 204171962U CN 201420620664 U CN201420620664 U CN 201420620664U CN 204171962 U CN204171962 U CN 204171962U
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- CN
- China
- Prior art keywords
- pneumatic operated
- operated valve
- hole section
- detaching apparatus
- spool
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 10
- 229910001369 Brass Inorganic materials 0.000 description 4
- 239000010951 brass Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Valve Housings (AREA)
Abstract
The utility model provides a kind of pneumatic operated valve attaching/detaching apparatus, this pneumatic operated valve attaching/detaching apparatus comprises: the first dismounting portion (10), comprise first end and second end relative with first end, first dismounting portion (10) has runs through first end and the second end and the first installing hole (11) coordinated with the valve rod (21) of pneumatic operated valve, first end is the first drive end, and the end face of the second end is provided with the fixture block (12) coordinated with the draw-in groove on the spool of pneumatic operated valve (22).The technical solution of the utility model efficiently solves in prior art the problem dismantling spool inconvenience.
Description
Technical field
The utility model relates to oil field equipment maintenance technique field, in particular to a kind of pneumatic operated valve attaching/detaching apparatus.
Background technology
At present, every platform water treating softener device of uphole steam generator is provided with size pneumatic operated valve 21, the instruction that pneumatic operated valve receiving control program sends, and hydrous water process softening plant completes operation, regenerative process.Pneumatic operated valve is imported from America entirely, and the spool material of pneumatic operated valve is HP59 brass, and the hardness of HP59 brass is lower.
During on-the-spot maintenance pneumatic operated valve needing spool to disassemble, because pneumatic operated valve does not have supporting extracting tool, needing two operator's operations when dismantling spool.Particularly, an operator fixes valve rod with screwdriver, and another operator's screwdriver and hammer knock spool groove, so just spool can be disassembled from valve seat.Inspection can be carried out to sealing gasket, O RunddichtringO etc. after having dismantled spool to change.
Because the brass of spool is softer, when knocking, when the strength of operator is excessive, valve rod groove, the easy deformed damaged of spool groove may be caused like this; When the strength of operator is too small, cannot spool be opened again, and then cause mainteinance repair work not only consuming time but also require great effort.
Utility model content
The utility model aims to provide a kind of pneumatic operated valve attaching/detaching apparatus, to solve in prior art the problem dismantling spool inconvenience.
To achieve these goals, the utility model provides a kind of pneumatic operated valve attaching/detaching apparatus, comprise: the first dismounting portion, comprise first end and second end relative with first end, first dismounting portion has runs through first end and the second end and the first installing hole coordinated with the valve rod of pneumatic operated valve, first end is the first drive end, and the end face of the second end is provided with the fixture block coordinated with the draw-in groove on the spool of pneumatic operated valve.
Further, pneumatic operated valve also comprises nut, and nut sleeve is located on the end of the thread segment of valve rod, and the valve rod groove on the end face of the thread segment of valve rod is arranged in nut.
Further, pneumatic operated valve attaching/detaching apparatus also comprises the second dismounting portion, second dismounting portion has the second installing hole running through it, second installing hole comprises the first hole section and the second hole section that are connected, the aperture of the first hole section is greater than the aperture of the second hole section, first hole section and nut screw connection, the second hole section forms dismounting hole.
Further, pneumatic operated valve attaching/detaching apparatus also comprises the second dismounting portion, second dismounting portion has the second installing hole running through it, second installing hole comprises the first hole section and the second hole section that are connected, the aperture of the first hole section is greater than the aperture of the second hole section, first hole section coordinates with the external screw thread of valve rod, and the second hole section forms dismounting hole.
Further, the one end away from spool in the second dismounting portion is the second drive end.
Further, fixture block extends along the radial direction of valve rod.
Further, draw-in groove comprises the first draw-in groove and the second draw-in groove, and fixture block comprises the first fixture block coordinated with the first draw-in groove and the second fixture block coordinated with the second draw-in groove, and the first fixture block and the second fixture block are positioned at the relative both sides of the first installing hole.
Further, the first installing hole comprises the 3rd hole section, the 4th hole section and the 5th hole section that connect successively, the one end fits towards spool in the 5th hole section and the second dismounting portion.
Further, the cross sectional shape of first end is hexagon.
Further, the cross sectional shape of the one end away from spool in the second dismounting portion is hexagon.
Application the technical solution of the utility model, pneumatic operated valve attaching/detaching apparatus comprises the first dismounting portion, first dismounting portion comprises first end and second end relative with first end, first dismounting portion has runs through first end and the second end and the first installing hole coordinated with the valve rod of pneumatic operated valve, first end is the first drive end, and the end face of the second end is provided with the fixture block coordinated with the draw-in groove on the spool of pneumatic operated valve.When dismantling the spool of pneumatic operated valve, operator's hand screwdriver is put into valve rod groove and is fixed valve rod, and the first drive end pulled by another hand spanner, so just spool can be disassembled in valve seat.Above-mentioned unloading process only needs people's operation, and convenient disassembly, saves manpower and operating time, significantly reduce the labour intensity of operating personnel.Meanwhile, use above-mentioned pneumatic operated valve attaching/detaching apparatus not need to knock spool draw-in groove and just spool can be disassembled, the situation effectively avoided draw-in groove to deform or damage, and then the spoilage effectively reducing operated pneumatic valve assembly.Above-mentioned pneumatic operated valve attaching/detaching apparatus is also applicable to spool, valve rod to be arranged in valve seat.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the structural representation coordinated with pneumatic operated valve according to the embodiment of pneumatic operated valve attaching/detaching apparatus of the present utility model;
Fig. 2 shows the structural representation in the first dismounting portion of the pneumatic operated valve attaching/detaching apparatus of Fig. 1;
Fig. 3 shows the A-A in the first dismounting portion of Fig. 2 to cross-sectional schematic;
Fig. 4 shows the B in the first dismounting portion of Fig. 2 to structural representation;
Fig. 5 shows the structural representation in the second dismounting portion of the pneumatic operated valve attaching/detaching apparatus of Fig. 1;
Fig. 6 shows the C-C in the second dismounting portion of Fig. 5 to cross-sectional schematic; And
Fig. 7 shows the D-D in the second dismounting portion of Fig. 5 to cross-sectional schematic.
Above-mentioned accompanying drawing comprises the following drawings mark:
10, the first dismounting portion; 11, the first installing hole;
111, the 3rd hole section; 112, the 4th hole section;
113, the 5th hole section; 12, fixture block;
121, the first fixture block; 122, the second fixture block;
21, valve rod; 22, spool;
30, the second dismounting portion; 31, the second installing hole;
311, the first hole section; 312, the second hole section;
40, nut.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
It is noted that following detailed description is all exemplary, be intended to provide further instruction to the application.Unless otherwise, all technology used herein and scientific terminology have the identical meanings usually understood with the application person of an ordinary skill in the technical field.
It should be noted that used term is only to describe detailed description of the invention here, and be not intended to the illustrative embodiments of restricted root according to the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative is also intended to comprise plural form, in addition, it is to be further understood that, " comprise " when using term in this manual and/or " comprising " time, it indicates existing characteristics, step, operation, device, assembly and/or their combination.
Now, the illustrative embodiments according to the application is described with reference to the accompanying drawings in more detail.But these illustrative embodiments can be implemented by multiple different form, and should not be interpreted as being only limited to embodiment set forth herein.Should be understood that, there is provided these embodiments be in order to make the application open thorough and complete, and the design of these illustrative embodiments is fully conveyed to those of ordinary skill in the art, in the accompanying drawings, for the sake of clarity, expand the thickness in layer and region, and use the device that identical Reference numeral represents identical, thus will omit description of them.
As depicted in figs. 1 and 2, the pneumatic operated valve attaching/detaching apparatus of the present embodiment comprises the first dismounting portion 10, first dismounting portion 10 comprises first end and second end relative with first end, first dismounting portion 10 has runs through first end and the second end and the first installing hole 11 coordinated with the valve rod 21 of pneumatic operated valve, first end is the first drive end, and the end face of the second end is provided with the fixture block 12 coordinated with the draw-in groove on the spool 22 of pneumatic operated valve.
The pneumatic operated valve attaching/detaching apparatus of application the present embodiment, pneumatic operated valve attaching/detaching apparatus comprises the first dismounting portion 10, first dismounting portion 10 comprises first end and second end relative with first end, first dismounting portion 10 has runs through first end and the second end and the first installing hole 11 coordinated with the valve rod 21 of pneumatic operated valve, first end is the first drive end, and the end face of the second end is provided with the fixture block 12 coordinated with the draw-in groove on the spool 22 of pneumatic operated valve.When dismantling the spool 22 of pneumatic operated valve, operator's hand screwdriver is put into valve rod groove and is fixed valve rod 21, and the first drive end pulled by another hand spanner, so just spool 22 can be disassembled in valve seat.Above-mentioned unloading process only needs people's operation, and convenient disassembly, saves manpower and operating time, significantly reduce the labour intensity of operating personnel.Meanwhile, use above-mentioned pneumatic operated valve attaching/detaching apparatus not need to knock spool draw-in groove and just spool 22 can be disassembled, the situation effectively avoided draw-in groove to deform or damage, and then the spoilage effectively reducing operated pneumatic valve assembly.Above-mentioned pneumatic operated valve attaching/detaching apparatus is also applicable to spool 22, valve rod 21 to be arranged in valve seat.
Operator needs very large active force spool 22 could be disassembled in valve seat when dismantling spool 22, valve rod 21, at this moment the power that screwdriver acts in valve rod groove may be excessive, valve rod groove may be caused like this to deform, and then cause nut 40 can not be arranged on valve rod 21, thus add the spoilage of operated pneumatic valve assembly.
In the present embodiment, pneumatic operated valve also comprises nut 40, and nut 40 is set on the end of the thread segment of valve rod 21, and the valve rod groove on the end face of the thread segment of valve rod 21 is arranged in nut 40.When screwdriver coordinates with valve rod groove, nut 40 can stop the distortion of valve rod groove effectively, and then effectively reduces the spoilage of operated pneumatic valve assembly.
As shown in Figure 5, in the present embodiment, pneumatic operated valve attaching/detaching apparatus also comprises the second dismounting portion 30, second dismounting portion 30 has the second installing hole 31 running through it, second installing hole 31 comprises the first hole section 311 and the second hole section 312 be connected, the aperture of the first hole section 311 is greater than the aperture of the second hole section 312, and the first hole section 311 coordinates with nut 40, and the second hole section 312 forms dismounting hole.Screwdriver coordinates with valve rod groove through the second hole section 312.During installation, first nut 40 can be arranged in the first hole section 311, then the second dismounting portion 30 be moved towards valve rod 21 together with nut 40, nut 40 is arranged on the thread segment of valve rod 21.During mounting nuts 40, need valve rod groove to be arranged in nut 40, effectively can stop the distortion of valve rod groove like this, and then effectively reduce the spoilage of operated pneumatic valve assembly.
As shown in Figure 7, preferably, the cross sectional shape of the first hole section 311 is hexagon.This spline structure is simple, easy to process.More preferably, the cross sectional shape of the first hole section 311 is regular hexagon.Certainly, the cross sectional shape of the first hole section 311 is also not limited to this.
In the present embodiment, the one end away from spool 22 in the second dismounting portion 30 is the second drive end.Operator can operate the second drive end and is arranged on by nut 40 on the thread segment of valve rod 21, easy and simple to handle, saves manpower, effectively reduces the labour intensity of operating personnel.
As shown in Figure 6, preferably, the cross sectional shape of the one end away from spool 22 in the second dismounting portion 30 is hexagon.Just can be arranged on the thread segment of valve rod 21 by nut 40 by common dismantling device (such as spanner) like this, structure is simple, easy to use, processes easy.More preferably, the cross sectional shape of the one end away from spool 22 in the second dismounting portion 30 is regular hexagon.Certainly, the cross sectional shape of the one end away from spool 22 in the second dismounting portion 30 is also not limited to this.
In the present embodiment, fixture block 12 extends along the radial direction of valve rod 21.The contact area of fixture block 12 and draw-in groove can be increased like this, make to act on active force on draw-in groove evenly, operate easier to be laborsaving.
As shown in Figure 4, in the present embodiment, draw-in groove comprises the first draw-in groove and the second draw-in groove, and fixture block 12 comprises the first fixture block 121 coordinated with the first draw-in groove and the second fixture block 122, first fixture block 121 coordinated with the second draw-in groove is positioned at the relative both sides of the first installing hole 11 with the second fixture block 122.Fixture block 12 can be made so completely mutually embedding with draw-in groove, dismounting and act on active force on draw-in groove when spool 22 is installed evenly, operate easier to be laborsaving, the situation that so also can effectively stop draw-in groove to deform, and then effectively reduce the spoilage of spool.
As shown in Figure 2, in the present embodiment, the first installing hole 11 comprise connect successively the 3rd hole section 111, the 4th hole section 112 and the 5th hole section the 113, five hole section 113 and the second dismounting portion 30 the one end fits towards spool 22.
As shown in Figure 3, in the present embodiment, the cross sectional shape of first end is hexagon.Just first end can be driven like this by common dismantling device (such as spanner), and then spool 22, valve rod 21 disassembled in valve seat or spool 22, valve rod 21 are arranged in valve seat, structure is simple, easy to operate, handy flexibly, process easy.Preferably, the cross sectional shape of first end is regular hexagon.Certainly, the cross sectional shape of first end is also not limited to this.
As shown in Figure 2, in the present embodiment, the first dismounting portion 10 comprises the first shell of column, the second shell of column and the first driving section that connect successively, and the end face of the first shell of column is provided with fixture block 12, and first drives section to form the first drive end.This spline structure is simple, and volume is little, easy to carry, handy flexibly, safe and reliable.Preferably, the first shell of column and the second shell of column are cylindrical section.
As shown in Figure 5, in the present embodiment, the second dismounting portion 30 comprises the 3rd shell of column and second connected successively and drives section, and second drives section to form the second drive end.This spline structure is simple, and volume is little, easy to carry, handy flexibly, safe and reliable.Preferably, the 3rd shell of column is cylindrical section.
In the present embodiment, the aperture of the 5th hole section 113 is identical with the external diameter of the 3rd shell of column, the aperture of the 3rd hole section 111 and the 4th hole section 112 and the major diameter fit of valve rod 21.The external diameter of the first shell of column is identical with the external diameter of spool 22, and the external diameter of the first shell of column is greater than the external diameter of the second shell of column.The aperture of the second hole section 312 and the major diameter fit of valve rod 21.
The dismounting spool 22 of the pneumatic operated valve attaching/detaching apparatus of application the present embodiment, the operation principle of valve rod 21 are as follows:
When dismantling the spool 22 of pneumatic operated valve, the fixture block 12 in the first dismounting portion 10 is mounted in the draw-in groove on spool 22, again nut 40 is put into the first hole section 311, then the 5th hole section 113 the second dismounting portion 30 being put into the first dismounting portion 10 fixes valve rod, use spanner to rotate the second drive end nut 40 is screwed on the thread segment of valve rod 21, make valve rod groove be arranged in nut 40.At this moment operator's hand screwdriver is put into valve rod groove and is fixed valve rod 21, and the first drive end pulled by another hand spanner, so just spool 22, valve rod 21 can be disassembled in valve seat.
The spool 22 of pneumatic operated valve, the installation process of valve rod 21 and unloading process are similar, and in this not go into detail.
Introduce as background technology, need two operator's operations when dismounting spool of the prior art, valve rod, particularly, another operator's screwdriver and hammer knock spool groove.Because the brass of spool is softer, when knocking, when the strength of operator is excessive, valve rod groove, the easy deformed damaged of spool groove may be caused like this; When the strength of operator is too small, cannot spool be opened again, and then cause mainteinance repair work not only consuming time but also require great effort.In order to solve the problem, present applicant proposes a kind of pneumatic operated valve attaching/detaching apparatus, the pneumatic operated valve attaching/detaching apparatus of application the present embodiment, dismounting and spool 22 is installed, the process of valve rod 21 only needs people operation, take-down time is down to 7min by original 15min, and the removing damaged rate of pneumatic operated valve is down to 1.65% by original 8.1%.The volume of the pneumatic operated valve attaching/detaching apparatus of the present embodiment is little, easy to carry, handy flexibly, safe and reliable, simple to operation, easy to use, save manpower, save time, effectively reduce the labour intensity of operating personnel, and then effectively reduce equipment failure rate, thus rate when effectively improve water treating softener plant running.
In unshowned in the drawings embodiment, the first hole section coordinates with the external screw thread of valve rod, and the second hole section forms dismounting hole.First hole section is screwed hole, and the first hole section also can stop the distortion of valve rod groove effectively, and then effectively reduces the spoilage of pneumatic operated valve.
It should be noted that, term " first ", " second " etc. in the description of the application and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as the embodiment example of the application described herein if with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
For convenience of description, here can usage space relative terms, as " ... on ", " in ... top ", " at ... upper surface ", " above " etc., be used for the spatial relation described as a device shown in the figure or feature and other devices or feature.Should be understood that, space relative terms is intended to comprise the different azimuth in use or operation except the described in the drawings orientation of device.Such as, " in other devices or structure below " or " under other devices or structure " will be positioned as after if the device in accompanying drawing is squeezed, being then described as the device of " above other devices or structure " or " on other devices or structure ".Thus, exemplary term " in ... top " can comprise " in ... top " and " in ... below " two kinds of orientation.This device also can other different modes location (90-degree rotation or be in other orientation), and relatively describe space used here and make respective explanations.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a pneumatic operated valve attaching/detaching apparatus, is characterized in that, comprising:
First dismounting portion (10), comprise first end and second end relative with described first end, described first dismounting portion (10) has runs through described first end and described second end and the first installing hole (11) coordinated with the valve rod (21) of pneumatic operated valve, described first end is the first drive end, and the end face of described second end is provided with the fixture block (12) coordinated with the draw-in groove on the spool of described pneumatic operated valve (22).
2. pneumatic operated valve attaching/detaching apparatus according to claim 1, it is characterized in that, described pneumatic operated valve also comprises nut (40), described nut (40) is set on the end of the thread segment of described valve rod (21), and the valve rod groove on the end face of the thread segment of described valve rod (21) is arranged in described nut (40).
3. pneumatic operated valve attaching/detaching apparatus according to claim 2, it is characterized in that, described pneumatic operated valve attaching/detaching apparatus also comprises the second dismounting portion (30), described second dismounting portion (30) has the second installing hole (31) running through it, described second installing hole (31) comprises the first hole section (311) and the second hole section (312) that are connected, the aperture of described first hole section (311) is greater than the aperture of described second hole section (312), described first hole section (311) coordinates with described nut (40), described second hole section (312) forms dismounting hole.
4. pneumatic operated valve attaching/detaching apparatus according to claim 2, it is characterized in that, described pneumatic operated valve attaching/detaching apparatus also comprises the second dismounting portion (30), described second dismounting portion (30) has the second installing hole (31) running through it, described second installing hole (31) comprises the first hole section (311) and the second hole section (312) that are connected, the aperture of described first hole section (311) is greater than the aperture of described second hole section (312), described first hole section (311) coordinates with the external screw thread of described valve rod (21), described second hole section (312) forms dismounting hole.
5. the pneumatic operated valve attaching/detaching apparatus according to claim 3 or 4, is characterized in that, the one end away from described spool (22) in described second dismounting portion (30) is the second drive end.
6. pneumatic operated valve attaching/detaching apparatus according to claim 1, is characterized in that, described fixture block (12) extends along the radial direction of described valve rod (21).
7. pneumatic operated valve attaching/detaching apparatus according to claim 1, it is characterized in that, described draw-in groove comprises the first draw-in groove and the second draw-in groove, described fixture block (12) comprises the first fixture block (121) coordinated with described first draw-in groove and the second fixture block (122) coordinated with described second draw-in groove, and described first fixture block (121) is positioned at the relative both sides of described first installing hole (11) with described second fixture block (122).
8. the pneumatic operated valve attaching/detaching apparatus according to claim 3 or 4, it is characterized in that, described first installing hole (11) comprises the 3rd hole section (111), the 4th hole section (112) and the 5th hole section (113) that connect successively, the one end fits towards described spool (22) in described 5th hole section (113) and described second dismounting portion (30).
9. pneumatic operated valve attaching/detaching apparatus according to claim 1, is characterized in that, the cross sectional shape of described first end is hexagon.
10. the pneumatic operated valve attaching/detaching apparatus according to claim 3 or 4, is characterized in that, the cross sectional shape of the one end away from described spool (22) in described second dismounting portion (30) is hexagon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420620664.3U CN204171962U (en) | 2014-10-24 | 2014-10-24 | Pneumatic operated valve attaching/detaching apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420620664.3U CN204171962U (en) | 2014-10-24 | 2014-10-24 | Pneumatic operated valve attaching/detaching apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204171962U true CN204171962U (en) | 2015-02-25 |
Family
ID=52560798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420620664.3U Expired - Fee Related CN204171962U (en) | 2014-10-24 | 2014-10-24 | Pneumatic operated valve attaching/detaching apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204171962U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104942750A (en) * | 2015-06-30 | 2015-09-30 | 郝胜元 | Main oil pressure electromagnetic valve maintenance tool and using method thereof |
| CN112338865A (en) * | 2019-08-09 | 2021-02-09 | 中核检修有限公司 | Force unloading device for pneumatic valve maintenance |
-
2014
- 2014-10-24 CN CN201420620664.3U patent/CN204171962U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104942750A (en) * | 2015-06-30 | 2015-09-30 | 郝胜元 | Main oil pressure electromagnetic valve maintenance tool and using method thereof |
| CN104942750B (en) * | 2015-06-30 | 2017-12-26 | 重庆盛瓒科技有限公司 | A kind of main oil pressure magnetic valve maintenance frock and its application method |
| CN112338865A (en) * | 2019-08-09 | 2021-02-09 | 中核检修有限公司 | Force unloading device for pneumatic valve maintenance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150225 |
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| CF01 | Termination of patent right due to non-payment of annual fee |