CN110877872A - Laborsaving assembly and disassembly tools of transformer suspension type respirator - Google Patents
Laborsaving assembly and disassembly tools of transformer suspension type respirator Download PDFInfo
- Publication number
- CN110877872A CN110877872A CN201911223250.0A CN201911223250A CN110877872A CN 110877872 A CN110877872 A CN 110877872A CN 201911223250 A CN201911223250 A CN 201911223250A CN 110877872 A CN110877872 A CN 110877872A
- Authority
- CN
- China
- Prior art keywords
- frame
- respirator
- lifting
- positioning
- suspension type
- 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.)
- Pending
Links
- 239000000725 suspension Substances 0.000 title claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 230000009194 climbing Effects 0.000 claims description 8
- 238000012423 maintenance Methods 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000000741 silica gel Substances 0.000 description 4
- 229910002027 silica gel Inorganic materials 0.000 description 4
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
- B66F7/12—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by mechanical jacks
- B66F7/14—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by mechanical jacks screw operated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The invention discloses a labor-saving dismounting tool for a suspension type respirator of a transformer, which comprises a support frame detachably connected with a respirator connecting frame, a lifting frame for lifting the respirator and a jacking mechanism for jacking the lifting frame, wherein the lifting frame is positioned below a respirator mounting seat and is in sliding connection with the support frame, and the jacking mechanism is connected with the support frame. The invention has the characteristics of being capable of lifting and fixing the respirator, replacing manual labor and facilitating operation and maintenance personnel to tighten bolts.
Description
Technical Field
The invention relates to the technical field of replacement of a transformer respirator, in particular to a labor-saving dismounting tool for a suspension type transformer respirator.
Background
The transformer breather is also called as a transformer moisture absorber or a transformer silica gel tank and is used for absorbing moisture in air entering an oil conservator rubber bag and a diaphragm, removing and drying sundries and moisture in air entering an oil conservator of a transformer (or a mutual inductor) due to the change of the temperature of the transformer oil so as to prevent the transformer from being affected with damp, so that the insulation strength of the transformer oil is ensured, and after the transformer breather is used for a period of time, the silica gel in the breather needs to be replaced.
The standing transformer respirator is usually in a suspension type, is about 2-3 meters away from the ground, and is installed on an installation seat through a transverse connecting frame and a fixed connecting pipe as shown in figure 5, wherein the installation seat is fixed at the bottom end of the connecting pipe. Because no special tool is provided, when the replacement work of the silica gel of the respirator is carried out, one person needs to screw the screw at the upper part, and the other person needs to forcibly lift up the respirator at the lower part, otherwise, the three bolts at the connecting part are difficult to twist due to uneven stress. And the respirator has after having changed silica gel more than ten jin of weight, and the manpower is often very hard with its lifting up, need keep holding in the palm tight state moreover and can not loosen the hand until three bolts are whole to be fastened, otherwise the unable fastening of bolt leads to the respirator not tight, causes to wet and influences transformer normal operating, and the long-time heavy burden of personnel is lifted and not only probably leads to the glass shell of respirator to break owing to the atress inequality, also can lead to other people, equipment injury accident owing to personnel's physical strength is unsupported.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a labor-saving dismounting tool for a suspension type transformer respirator, which can lift and fix the respirator, replaces manual labor and is convenient for operation and maintenance personnel to tighten bolts.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a laborsaving assembly and disassembly tools of transformer suspension type respirator, is used for dismantling the support frame of being connected, the support frame that is used for lifting the respirator and be used for the jacking with the respirator link lift the climbing mechanism of frame, lift the frame and be located respirator mount pad below and with support frame sliding connection, climbing mechanism with the support frame is connected.
Further, the respirator connecting pipe fixing device further comprises a positioning mechanism, the positioning mechanism comprises a positioning frame and a tray, the positioning frame is provided with a positioning hole used for being in sleeve joint with the respirator connecting pipe, the axis of the tray passes through the center of the positioning hole, the positioning frame is detachably connected with the supporting frame, the tray is rotatably connected with the lifting frame, and the tray can rotate 360 degrees around the axis.
Further, the locating rack includes first locating rack and second locating rack, first locating rack and second locating rack all include coupling part and circular arc part, the mutual butt of circular arc part of first locating rack and second locating rack forms the locating hole, and one of them butt department is articulated, and another butt department can be dismantled and connect the connection
Furthermore, the locating rack is connected with the supporting frame through elastic pins, and a plurality of elastic pin holes used for adjusting the distance between the locating rack and the tray are formed in the supporting frame.
Furthermore, a spherical bearing is arranged at the rotary connection position of the tray and the lifting frame.
Further, climbing mechanism includes adjusting nut, the regulation is located lift frame below just passes through threaded connection in the support frame.
In another scheme of the invention, the jacking mechanism comprises a fixed bracket, a jacking rod and an adjusting nut, the fixed bracket is positioned below the lifting frame and fixedly connected with the supporting frame, one end of the jacking rod is abutted against the lifting frame, the other end of the jacking rod penetrates through the fixed bracket, and the adjusting nut is positioned above the fixed bracket and is connected with the jacking rod through threads.
Furthermore, a guide fixing sleeve is arranged at one end, abutted against the lifting frame, of the jacking rod, and the guide fixing sleeve is fixedly connected with the lifting frame.
The invention has the following advantages: the whole respirator can be fixedly hung on the respirator connecting frame through the supporting frame, the respirator is placed on the lifting frame during installation, the lifting frame is driven to ascend until the lifting frame abuts against the respirator installing seat so as to fix the respirator, the lifting mechanism is adjusted to abut against the bottom of the respirator so as to loosen the bolt during disassembly, the lifting frame descends by adjusting the lifting mechanism, the respirator can be taken down, manual labor is replaced, and operation and maintenance personnel can conveniently tighten or disassemble the bolt.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is a front view of a labor-saving tool for mounting and dismounting a transformer-suspended respirator in accordance with embodiment 1;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a front view of the power saving tool for mounting and dismounting the transformer suspended type respirator in the embodiment 2;
FIG. 4 is an enlarged view of FIG. 3 at A;
FIG. 5 is a view showing the working state of the power saving tool for mounting and dismounting the transformer-suspended respirator of the present invention;
in the figure: 1-support frame, 101-elastic pin hole, 2-lifting frame, 3-lifting mechanism, 301-adjusting nut, 302-lifting rod, 303-fixing bracket, 4-positioning mechanism, 401-positioning frame, 401 a-positioning hole, 401 b-first positioning frame, 403 c-second positioning frame, 402-tray, 5-spherical bearing, 6-elastic pin, 7-guiding fixing sleeve, 8-respirator connecting frame, 9-respirator connecting pipe, 10-respirator mounting seat and 11-respirator.
Detailed Description
The technical solution in the embodiments of the present application is described below with reference to the drawings in the embodiments of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Example 1
As shown in fig. 1-4, a transformer suspension type respirator 11 laborsaving assembly and disassembly tools, including support frame 1, lift frame 2 and climbing mechanism 3, lift frame 2 and support frame 1 sliding connection, climbing mechanism 3 is connected with support frame 1, concretely, in this embodiment, support frame 1 is two guide bars that set up side by side, lift frame 2 both ends are equipped with the through-hole, lift frame 2 cover is on two guide bars, climbing mechanism 3 includes two adjusting nut 301, the below of lifting, respectively through an adjusting nut 301 of threaded connection on two guide bars, in order to prevent the screw thread conquassation of adjusting nut 301 and lifting bar 302 junction, can increase the thickness of adjusting nut 301, with the distance of increase threaded connection.
Can hang whole fixed on respirator link 8 through support frame 1, fixed mode can select the elastic pin 6, mechanical connecting piece commonly used such as bolt is fixed, respirator 11 places on lifting frame 2 during the installation, thereby adjust adjusting nut 301 and drive lifting frame 2 and rise until butt respirator mount pad 10 fixed with respirator 11, during the dismantlement, adjust adjusting nut 301 and make lifting frame 2 butt respirator 11 bottoms, loosen the bolt, adjust adjusting nut 301 and make lifting frame 2 descends, can take off respirator 11, the hand labor has been replaced, make things convenient for fortune dimension personnel to tighten or dismantle the bolt.
The respiratory device comprises a support frame 1, a breather mounting seat 10, a positioning mechanism 4 and a support frame, wherein the breather mounting seat is provided with a breather connecting pipe 9, the breather mounting seat is provided with a breather connecting pipe and a breather mounting hole, the breather connecting pipe is used for connecting the breather mounting seat 10 with the support frame 1, the breather connecting pipe is used for connecting the breather mounting seat with the support frame 2, the breather connecting pipe is used for connecting the breather mounting seat with the support; specifically, in this embodiment, locating rack 401 both ends are equipped with the through-hole cover on support frame 1, and the side is connected with support frame 1 through elastic pin 6, and elastic pin 6 is connected locating rack 401 and support frame 1 back, can fix on respirator link 8, during the operation, need not to connect support frame 1 and respirator link 8 independently again, directly is fixed locating rack 401, support frame 1 and respirator link 8 three, reduces the operation action, raises the efficiency.
In order to rotate the tray 402, a spherical bearing 5 is arranged at the joint of the tray 402 and the lifting frame 2 in a rotating connection mode, when the respirator 11 is installed, the positioning frame 401 is sleeved on the respirator connecting pipe 9, the respirator 11 is placed on the tray 402, the axial lead of the respirator 11 is ensured to coincide with the axial lead of the tray 402 as much as possible (namely, the axial lead of the respirator 11 and the mounting seat is ensured to coincide to a certain extent), the lifting frame 2 is driven to ascend by adjusting the adjusting nut 301 until the lifting frame is to be abutted to the bottom surface of the respirator mounting seat 10, the lifting is stopped, the tray 402 is rotated, bolt holes in the respirator 11 are aligned with bolt holes in the respirator mounting seat 10, the adjusting nut 301 is continuously adjusted until the respirator 11 is abutted to the respirator mounting seat 10, and the bolts can be screwed.
In order to facilitate the socket connection of the positioning hole 401a and the respirator connection pipe 9, the positioning frame 401 includes a first positioning frame 401b and a second positioning frame 403c, both the first positioning frame 401b and the second positioning frame 403c include a connection portion and an arc portion, the arc portions of the first positioning frame 401b and the second positioning frame 403c are mutually abutted to form the positioning hole 401a, one of the abutted portions is hinged, the other abutted portion is detachably connected, during processing and manufacturing, the first positioning frame 401b and the second positioning frame 403c can be separately processed or integrally formed, after being integrally formed, the positioning frame 401 is cut into two symmetrical portions along the central line direction of the central hole, one of the two portions is hinged through a pin shaft, the other end is connected through a bolt, during use, only the bolt needs to be taken down, and the positioning frame 401 is opened along the hinged point, so that the positioning frame 401 can be quickly sleeved on the respirator connection pipe 9.
In order to adapt to respirators 11 of different models, namely different heights, the supporting frame 1 is provided with a plurality of elastic pin holes 101 along the length direction, and the distance between the positioning frame 401 and the tray 402 can be adjusted by moving the position of the positioning frame 401 to be matched with the different elastic pin holes 101, so that the breathing apparatuses 11 of different heights are adapted.
Example 2
The difference between this embodiment and embodiment 1 is that the jacking mechanism 3 includes a fixing bracket 303, a jacking rod 302 and an adjusting nut 301 in addition to the adjusting nut 301, the fixing bracket 303 is located below the lifting frame 2 and is fixedly connected to the supporting frame 1, specifically, through holes are provided at both ends of the fixing bracket 303 and are sleeved on the supporting frame 1, and are fixed by common members such as an elastic pin 6 or a bolt, the jacking rod 302 is provided with threads, a through hole is provided at the middle part of the fixing bracket 303, the jacking rod 302 passes through the middle part of the fixing bracket 303 and abuts against the bottom of the lifting frame 2, the fixing bracket 303 plays a guiding role, the adjusting nut 301 is located above the fixing bracket 303 and is connected to the jacking rod 302, the lower end surface of the adjusting nut 301 abuts against the fixing bracket 303, in order to prevent the threaded collapse at the connection between the adjusting nut 301 and the jacking rod 302, the thickness of the adjusting nut 301 can be increased, so as.
In order to facilitate the lifting rod 302 to rotate and lift more easily when adjusting the adjusting nut 301, a bearing is provided between the lifting rod 302 and the through hole in the middle of the fixing bracket 303.
In order to move at one end of the jacking rod 302 abutted against the lifting frame 2, a guide fixing sleeve 7 is arranged at one end of the jacking rod 302 abutted against the lifting frame 2, the guide fixing sleeve 7 is fixedly connected with the lifting frame 2, and the fixing mode can be selected to be connected with a screw.
The working process of the invention is as follows: the positioning frame 401 is opened and sleeved on the respirator connecting pipe 9, the bolt is screwed, the supporting frame 1 is inserted into the fixing frame, the positioning frame 401 is moved to the elastic pin hole 101 at the proper position on the supporting frame 1 according to the height of the respirator 11, the elastic pin 6 is inserted, and the respirator connecting frame is fixed on the respirator connecting frame 8.
When the respirator 11 is installed, the respirator 11 is placed on the tray 402 as shown in fig. 5, the axial lead of the respirator 11 is ensured to coincide with the axial lead of the tray 402 as much as possible (namely, the axial lead of the respirator 11 and the mounting seat is ensured to coincide to a certain extent), the adjusting nut 301 is adjusted, the lifting frame 2 is driven to ascend until the lifting frame is abutted to the bottom surface of the respirator mounting seat 10, the jacking is stopped, the tray 402 is rotated, bolt holes in the respirator 11 are aligned with bolt holes in the respirator mounting seat 10, the adjusting nut 301 is continuously adjusted until the respirator 11 is abutted to the respirator mounting seat 10, and the bolts can be screwed down.
When the respirator 11 is disassembled, the adjusting nut 301 is adjusted to drive the lifting frame 2 to ascend until the tray 402 abuts against the bottom surface of the respirator 11, the breathing connecting bolt is unscrewed, and the adjusting nut 301 is reversely adjusted to drive the lifting frame 2 to descend, so that the respirator 11 is taken down.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides a laborsaving assembly and disassembly tools of transformer suspension type respirator which characterized in that: including be used for with respirator link (8) can dismantle support frame (1) of being connected, be used for lifting support (2) of respirator (11) and be used for the jacking lift mechanism (3) of lifting support (2), lift support (2) and support frame (1) sliding connection, jacking mechanism (3) with support frame (1) are connected.
2. The labor-saving dismounting tool for transformer suspension type respirators according to claim 1, wherein: still include positioning mechanism (4), positioning mechanism (4) include locating rack (401) and tray (402), locating rack (401) are equipped with locating hole (401a) that are used for cup jointing with respirator connecting pipe (9), the axial lead of tray (402) passes through the center of locating hole (401a), locating rack (401) with support frame (1) can be dismantled and be connected, tray (402) rotate with lifting frame (2) and be connected, tray (402) can be 360 rotatory around the axial lead.
3. The labor-saving dismounting tool for transformer suspension type respirators according to claim 2, wherein: the positioning frame (401) comprises a first positioning frame (401b) and a second positioning frame (403c), the first positioning frame (401b) and the second positioning frame (403c) both comprise a connecting portion and an arc portion, the arc portions of the first positioning frame (401b) and the second positioning frame (403c) are mutually abutted to form the positioning hole (401a), one abutting portion is hinged, and the other abutting portion is detachably connected.
4. The labor-saving dismounting tool for transformer suspension type respirators according to claim 2, wherein: the positioning frame (401) is connected with the supporting frame (1) through an elastic pin (6), and a plurality of elastic pin holes (101) used for adjusting the distance between the positioning frame (401) and the tray (402) are formed in the supporting frame (1).
5. The labor-saving dismounting tool for transformer suspension type respirators according to claim 2, wherein: and a spherical bearing (5) is arranged at the rotary connection part of the tray (402) and the lifting frame (2).
6. The labor-saving dismounting tool for transformer suspension type respirators according to claim 1, wherein: climbing mechanism (3) are including adjusting nut (301), adjusting nut (301) are located lift frame (2) below and pass through threaded connection in support frame (1).
7. The labor-saving dismounting tool for transformer suspension type respirators according to claim 1, wherein: climbing mechanism (3) include mounting bracket (303), lifting rod (302) and adjusting nut (301), mounting bracket (303) are located lift frame (2) below and in support frame (1) fixed connection, lifting rod (302) one end with lift frame (2) butt, the other end passes mounting bracket (303), adjusting nut (301) are located mounting bracket (303) top and in lifting rod (302) pass through threaded connection.
8. The labor-saving dismounting tool for transformer suspension type respirators according to claim 7, wherein: the jacking rod (302) with the one end of lifting frame (2) butt is equipped with the fixed cover of direction (7), the fixed cover of direction (7) with lifting frame (2) fixed connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911223250.0A CN110877872A (en) | 2019-12-03 | 2019-12-03 | Laborsaving assembly and disassembly tools of transformer suspension type respirator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911223250.0A CN110877872A (en) | 2019-12-03 | 2019-12-03 | Laborsaving assembly and disassembly tools of transformer suspension type respirator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110877872A true CN110877872A (en) | 2020-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911223250.0A Pending CN110877872A (en) | 2019-12-03 | 2019-12-03 | Laborsaving assembly and disassembly tools of transformer suspension type respirator |
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|---|---|
| CN (1) | CN110877872A (en) |
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| CN103836309A (en) * | 2014-02-24 | 2014-06-04 | 润邦卡哥特科工业有限公司 | Adjustable motor installation rotary table and application of adjustable motor installation rotary table |
| CN104577834A (en) * | 2015-01-12 | 2015-04-29 | 国家电网公司 | Transformer aspirator silica gel replacement tool |
| CN204333702U (en) * | 2015-01-29 | 2015-05-13 | 李庆才 | A kind of transformer breather changes instrument |
| CN105336485A (en) * | 2015-11-30 | 2016-02-17 | 国家电网公司 | Auxiliary combined platform for power transformer moisture absorber silica gel replacement |
| CN206901686U (en) * | 2017-07-12 | 2018-01-19 | 中国电建集团核电工程公司 | Punch device lifting device |
| CN207218097U (en) * | 2017-09-20 | 2018-04-10 | 国网江苏省电力公司泰州供电公司 | A kind of oil-filled transformer respirator changes servicing unit |
| CN108706503A (en) * | 2018-05-31 | 2018-10-26 | 广船国际有限公司 | A kind of hanging code installation method |
| CN211521470U (en) * | 2019-12-03 | 2020-09-18 | 中国南方电网有限责任公司超高压输电公司天生桥局 | Laborsaving assembly and disassembly tools of transformer suspension type respirator |
-
2019
- 2019-12-03 CN CN201911223250.0A patent/CN110877872A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203079628U (en) * | 2012-10-30 | 2013-07-24 | 中国西电电气股份有限公司 | Adjustable supporting apparatus used for assembling whole-phase coil of transformer |
| CN103836309A (en) * | 2014-02-24 | 2014-06-04 | 润邦卡哥特科工业有限公司 | Adjustable motor installation rotary table and application of adjustable motor installation rotary table |
| CN104577834A (en) * | 2015-01-12 | 2015-04-29 | 国家电网公司 | Transformer aspirator silica gel replacement tool |
| CN204333702U (en) * | 2015-01-29 | 2015-05-13 | 李庆才 | A kind of transformer breather changes instrument |
| CN105336485A (en) * | 2015-11-30 | 2016-02-17 | 国家电网公司 | Auxiliary combined platform for power transformer moisture absorber silica gel replacement |
| CN206901686U (en) * | 2017-07-12 | 2018-01-19 | 中国电建集团核电工程公司 | Punch device lifting device |
| CN207218097U (en) * | 2017-09-20 | 2018-04-10 | 国网江苏省电力公司泰州供电公司 | A kind of oil-filled transformer respirator changes servicing unit |
| CN108706503A (en) * | 2018-05-31 | 2018-10-26 | 广船国际有限公司 | A kind of hanging code installation method |
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