CN112355974A - Automatic fastening device for bolts of wiring board of live primary equipment in transformer substation - Google Patents
Automatic fastening device for bolts of wiring board of live primary equipment in transformer substation Download PDFInfo
- Publication number
- CN112355974A CN112355974A CN202011257870.9A CN202011257870A CN112355974A CN 112355974 A CN112355974 A CN 112355974A CN 202011257870 A CN202011257870 A CN 202011257870A CN 112355974 A CN112355974 A CN 112355974A
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- remote control
- torque wrench
- fixed
- control electric
- electric torque
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- 239000012212 insulator Substances 0.000 claims description 13
- 210000003127 knee Anatomy 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 230000008602 contraction Effects 0.000 abstract description 2
- 230000005520 electrodynamics Effects 0.000 description 8
- 230000007547 defect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
- B25B27/143—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same for installing wire thread inserts or tubular threaded inserts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The invention discloses an automatic fastening device for bolts of a wiring board of live primary equipment in a transformer substation, which comprises an insulating rod, a remote control electric torque wrench and a fixed pipe, wherein a limiting piece is arranged, so that the bolts on the wiring board are clamped between the remote control electric torque wrench and the limiting piece, and the purpose of automatic fastening is realized; the remote control electric torque wrench is provided with the insulating rod, the distance between the remote control electric torque wrench and the limiting part is convenient to adjust by rotating the insulating rod, the operation is convenient, the fastening is convenient, the power-off operation is not needed when the remote control electric torque wrench is fastened, the convenience in operation is improved, the heating degree of equipment is greatly relieved, the remote control fan is arranged, cold air is blown to the position of a bolt when the remote control electric torque wrench is fastened, the heat on the bolt is cooled, the problem that the bolt cannot be fastened thoroughly due to the principle of expansion with heat and contraction with cold when the bolt is at high temperature is avoided, and the fastening effect of the bolt is greatly improved.
Description
Technical Field
The invention relates to the technical field of primary overhaul of power transformation, in particular to an automatic fastening device for bolts of a wiring board of charged primary equipment in a transformer substation.
Background
Heating at the outdoor primary equipment terminal blocks can cause electrical discharges between the terminal blocks, thereby causing the temperature of the metal portions of the terminal blocks to rise above the melting point and burn. The defects of the position of the wiring board generally account for more than 60% of the heating defects, and most of the defects are caused by insufficient fastening torque of bolts on the wiring board or loosening of the bolts according to the maintenance experience, the bolts at the position of the wiring board need to be fastened, but when the bolts are fastened, the substation needs to be powered off for safe operation, the normal operation of electric power is greatly influenced, and great inconvenience exists.
Disclosure of Invention
The invention aims to provide an automatic fastening device facing a bolt of a live primary equipment wiring board in a transformer substation, which does not need power failure operation during fastening, can greatly relieve the heating degree of equipment, greatly improve the fastening effect of the bolt, improve the bolt overhauling efficiency on the primary equipment wiring board and is convenient to operate, so as to solve the problem that the bolt on the live equipment wiring board is inconvenient to fasten.
The purpose of the invention is realized as follows:
the utility model provides an automatic fastener towards electrified primary equipment wiring board bolt in transformer substation, the characteristic is: the remote control electric torque wrench comprises an insulating rod, a remote control electric torque wrench and a fixed pipe, wherein a connecting buckle is fixedly arranged on the insulating rod, and the lower end of a threaded rod is inserted into the insulating rod through a connecting buckle; an upper fixing block is fixedly arranged in the middle of the fixed pipe, a lower fixing block is fixedly arranged at the lower part of the fixed pipe, and the upper part and the middle part of the threaded rod are respectively connected to the upper fixing block and the lower fixing block in a threaded mode; the upper end of the fixed pipe is fixedly connected with one end of the cross rod, the other end of the cross rod is fixedly provided with a clamping seat, and the remote control electric torque wrench is clamped in the clamping seat from top to bottom through a clamping groove; the movable tube is sleeved at the middle position of the threaded rod in the fixed tube, the gap capable of exposing the threaded rod is arranged on the side wall of the middle of the fixed tube, one end of the lower arm penetrates through the gap to stretch into one side of the fixed tube, the lower arm is fixedly mounted at one side of the movable tube, the limiting part is fixedly mounted at the other end of the lower arm outside the fixed tube, and the limiting part is located under the remote control electric torque wrench.
Preferably, be equipped with the open-ended insulator spindle square hole that makes progress on the insulator spindle, be equipped with the recess at the inner wall in insulator spindle square hole, the lateral wall of connecting the buckle lower extreme be equipped with the insulator spindle square hole the recess matched with connect the buckle protruding, connect the buckle and pass through buckle formula connection and be in the same place with the insulator spindle is fixed, be equipped with the open-ended threaded rod round hole that makes progress on connecting the buckle, the lower extreme of threaded rod passes through threaded connection and is connected the buckle and fix together, and then is connected with the insulator spindle.
Preferably, the threaded rod is provided with a lower limit nut and an upper limit nut which are respectively connected with the upper end and the lower end of the movable tube in a threaded manner and used for limiting the vertical stroke of the movable tube.
Preferably, the limiting part comprises a bent rod, a limiting rod and a magnetic block, the lower end of the limiting rod is fixedly mounted at the upper end of the bent rod and is fixedly connected with the other end of the lower arm through the bent rod, and the magnetic block is fixedly mounted at the upper end of the limiting rod.
Preferably, the magnetic block and the limiting rod are in hexagonal column structures.
Preferably, a fixed pipe round hole is formed in one end of the cross rod, the upper end of the fixed pipe upwards penetrates through the cross rod round hole of the cross rod and then is fixedly installed in the fixed pipe round hole, and the fixed pipe, the lower arm and the cross rod are made of insulating materials.
Preferably, the remote control fan is fixedly installed at the upper end in the fixed pipe, the air dispersing holes are uniformly formed in the side wall of the upper end of the fixed pipe and at the lower end opposite to the remote control electric torque wrench, the air dispersing holes and the lower end of the remote control electric torque wrench are positioned on the same horizontal line, and the radiating fins capable of cooling the surrounding air are fixedly installed in the fixed pipe and opposite to the air dispersing holes.
Preferably, both sides of the upper end of the clamping seat are provided with inserting holes on the same horizontal line, a fixing rod for preventing the remote control electric torque wrench from being separated upwards is inserted into the inserting holes, and the lower end of the fixing rod is in contact with the upper surface of the remote control electric torque wrench.
The invention has the technical effects and advantages that:
1. the invention makes the bolt on the wiring board clamped between the remote control electrodynamic torque wrench and the limiting piece by arranging the limiting piece and the remote control electrodynamic torque wrench, controls the positive and negative rotation of the electrodynamic torque by the remote control device, further drives the positive and negative rotation of the bolt, and realizes the purpose of automatic fastening; the distance between the remote control electrodynamic torque wrench and the limiting piece is convenient to adjust, operate and fasten by arranging the insulating rod and rotating the insulating rod, and the heating degree of equipment can be relieved without power failure operation during fastening;
2. according to the invention, the remote control fan is arranged, so that cold air is blown to the position of the bolt on the wiring board during fastening, the heat on the bolt is cooled, the problem that the bolt is not fastened thoroughly due to the principle of expansion with heat and contraction with cold when the bolt is at high temperature is avoided, and the fastening effect of the bolt is greatly improved;
3. the invention has simple structure, reasonable design, convenient operation and use and greatly improves the bolt overhauling efficiency on the primary equipment wiring board.
The invention solves the problem that the bolt on the equipment wiring board is inconvenient to fasten.
Drawings
FIG. 1 is a front cross-sectional view of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a rear view of FIG. 2;
FIG. 4 is a schematic structural diagram of the card socket;
in the figure: 1. an insulating rod; 2. a remote controlled electric torque wrench; 3. a fixed tube; 4. a threaded rod; 5. an upper fixed block; 6. a lower fixed block; 7. a cross bar; 8. a card holder; 9. a movable tube; 10. a lower arm; 11. a limiting member; 12. a notch; 13. connecting a buckle; 14. a lower limit nut; 15. an upper limiting nut; 16. bending a rod; 17. a limiting rod; 18. a magnetic block; 19. a circular hole; 20. remotely controlling the fan; 21. air diffusing holes; 22. a heat sink; 23. inserting holes; 24. fixing the rod; 25. a square hole of the insulating rod; 26. a groove; 27. connecting the buckle bulges; 28. threaded rod round hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution:
an automatic fastening device for a bolt of a wiring board of live primary equipment in a transformer substation comprises an insulating rod 1, a remote control electric torque wrench 2 and a fixed tube 3, wherein an insulating rod square hole 25 with an upward opening is formed in the upper surface of the insulating rod 1, a groove 26 is formed in the inner wall of the insulating rod square hole 25, a connecting buckle bulge 27 matched with the groove 26 of the insulating rod square hole 25 is formed in the outer side wall of the lower end of a connecting buckle 13, the connecting buckle 13 is fixed with the insulating rod 1 through buckle type connection, a threaded rod round hole 28 with an upward opening is formed in the upper surface of the connecting buckle 13, and the lower end of a threaded rod 4 is fixed with the connecting buckle 13 through threaded type connection and further connected with the insulating rod 1; an upper fixing block 5 is fixedly arranged in the middle of the inside of the fixed pipe 3, a lower fixing block 6 is fixedly arranged on the lower portion of the inside of the fixed pipe 3, and the upper portion and the middle portion of the threaded rod 4 are respectively connected to the upper fixing block 5 and the lower fixing block 6 in a threaded mode; a fixed pipe round hole 19 is formed in one end of the cross rod 7, the upper end of the fixed pipe 3 penetrates through the cross rod round hole 19 of the cross rod 7 upwards and then is fixedly installed inside the fixed pipe round hole 19, the upper end of the fixed pipe 3 is fixedly connected with one end of the cross rod 7, the fixed pipe 3, the lower arm 10 and the cross rod 7 are all made of insulating materials, a clamping seat 8 is fixedly installed at the other end of the cross rod 7, and the remote control electric torque wrench 2 is clamped inside the clamping seat 8 from top to bottom through a clamping groove; a movable pipe 9 is sleeved in the fixed pipe 3 and in the middle of the threaded rod 4, and a lower limiting nut 14 and an upper limiting nut 15 for limiting the vertical stroke of the movable pipe 9 are respectively in threaded connection with the upper end and the lower end of the movable pipe 9 on the threaded rod 4; be equipped with the breach 12 that can expose threaded rod 4 at the middle part lateral wall of fixed pipe 3, the one end of lower arm 10 is passed breach 12 and is stretched into fixed pipe 3 back fixed mounting in one side of movable tube 9, the other end fixed mounting of lower arm 10 outside fixed pipe 3 has locating part 11, locating part 11 includes knee 16, gag lever post 17 and magnetic path 18, the lower extreme fixed mounting of gag lever post 17 is in the upper end of knee 16 and through the other end fixed connection of knee 16 with lower arm 10, magnetic path 18 fixed mounting is in the upper end of gag lever post 17, magnetic path 18 is the hexagonal column structure with gag lever post 17, locating part 11 is located remote control electric torque wrench 2 under.
A remote control fan 20 is fixedly installed at the upper end in the fixed tube 3, air diffusing holes 21 are uniformly opened on the side wall of the upper end of the fixed tube 3 and at the lower end opposite to the remote control electric torque wrench 2, the air diffusing holes 21 and the lower end of the remote control electric torque wrench 2 are on the same horizontal line, and a radiating fin 22 capable of cooling the surrounding air is fixedly installed in the fixed tube 3 and opposite to the air diffusing holes 21.
The two sides of the upper end of the clamping seat 8 are provided with inserting holes 23 on the same horizontal line, a fixing rod 24 for preventing the remote control electric torque wrench 2 from being separated upwards is inserted into the inserting holes 23, and the lower end of the fixing rod 24 is contacted with the upper surface of the remote control electric torque wrench 2.
Referring to fig. 1 and 2, when the remote control electric torque wrench is used, the insulation rod 1 is fixedly connected with the fixing tube 3 provided with the threaded rod 4 through the connecting buckle 13, the remote control electric torque wrench 2 is clamped in the clamping seat 8, the fixing rod 24 is inserted in the insertion hole 23, the remote control electric torque wrench 2 can be fixed in the clamping seat 8 through the fixing rod 24, and the remote control fan 20 is remotely started through the remote control device, so that the heat radiating fins 22 cool the surrounding air. After cooling, the remote control fan 20 is stopped, the invention is stretched into the bolt position of an external primary equipment wiring board through the insulating rod 1, the limiting piece 11 is clamped with the lower end of a target bolt on the primary equipment wiring board to be fastened, the limiting piece 11 is composed of a bent rod 16, a limiting rod 17 and a magnetic block 18, the magnetic block 18 is convenient for adsorbing the lower end of the bolt, the limiting rod 17 is convenient for stretching into the lower end of the target bolt, and the limiting rod 17 and the magnetic block 18 are both in a hexagonal column structure, so that the target bolt is convenient to limit. Through insulator spindle 1, it makes threaded rod 4 rotate between last fixed block 5 and lower fixed block 6 to twist threaded rod 4, and because threaded rod 4 and last fixed block 5 are threaded connection with lower fixed block 6, and then when threaded rod 4 rotated, can make fixed pipe 3 descend, fixed pipe 3 drives horizontal pole 7 again, cassette 8 descends together, remote control electrodynamic moment spanner 2 on cassette 8 also follows the decline, make remote control electrodynamic moment spanner 2's lower extreme and target bolt's upper end looks joint. When the fixed pipe 3 descends, because the lower arm 10 is sleeved on the threaded rod 4 through the movable pipe 9, one end of the lower arm 10 penetrates through the outside of the fixed pipe 3 through the notch 12, and further when the threaded rod 4 rotates, the lower arm 10 and the limiting part 11 are kept from rotating, because the upper end and the lower end of the movable pipe 9 on the threaded rod 4 are respectively in threaded connection with the lower limiting nut 14 and the upper limiting nut 15, the movable pipe 9, the lower arm 10 and the limiting part 11 are prevented from descending along with the descending of the fixed pipe 3, the stability of the remote control electric torque wrench in use is improved, and further a target bolt is always clamped between the remote control electric torque wrench 2 and the limiting part 11. The remote control electric torque wrench 2 is started through the remote control device, so that the remote control electric torque wrench 2 can be used for screwing and fastening a target bolt, and the automatic fastening effect is realized. When fastening, open remote control fan 20 through remote control unit for outside air is from upwards inhaling to the inside of fixed pipe 3 down, and cools off the back through fin 22, blows off through scattered gas pocket 21 again, because scattered gas pocket 21 is in same water flat line with remote control electrodynamic moment spanner 2 on, and then makes cold air blow to the position that remote control electrodynamic moment spanner 2 was twisted, is convenient for cool down the processing to the target bolt, avoids when the target bolt temperature is too high, twists and does not fasten, improves and screws up the effect.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (8)
1. The utility model provides an automatic fastener towards electrified primary equipment wiring board bolt in transformer substation which characterized in that: : the remote control electric torque wrench comprises an insulating rod, a remote control electric torque wrench and a fixed pipe, wherein a connecting buckle is fixedly arranged on the insulating rod, and the lower end of a threaded rod is spliced with the insulating rod through the connecting buckle; an upper fixing block is fixedly arranged in the middle of the fixed pipe, a lower fixing block is fixedly arranged at the lower part of the fixed pipe, and the upper part and the middle part of the threaded rod are respectively connected to the upper fixing block and the lower fixing block in a threaded mode; the upper end of the fixed pipe is fixedly connected with one end of the cross rod, the other end of the cross rod is fixedly provided with a clamping seat, and the remote control electric torque wrench is clamped in the clamping seat from top to bottom through a clamping groove; the movable tube is sleeved at the middle position of the threaded rod in the fixed tube, the gap capable of exposing the threaded rod is arranged on the side wall of the middle of the fixed tube, one end of the lower arm penetrates through the gap to stretch into one side of the fixed tube, the lower arm is fixedly mounted at one side of the movable tube, the limiting part is fixedly mounted at the other end of the lower arm outside the fixed tube, and the limiting part is located under the remote control electric torque wrench.
2. The automatic fastening device for live primary equipment terminal block bolts in substations according to claim 1, characterized in that: be equipped with the open-ended insulator spindle square hole that makes progress on the insulator spindle, be equipped with the recess at the inner wall in insulator spindle square hole, the lateral wall of connecting buckle lower extreme be equipped with the insulator spindle square hole the recess matched with connect the buckle protruding, connect the buckle and pass through buckle formula connection and be in the same place with the insulator spindle is fixed, be equipped with the open-ended threaded rod round hole that makes progress on connect the buckle, the lower extreme of threaded rod passes through the threaded connection and is in the same place with connect the buckle is fixed, and then is connected with the insulator spindle.
3. The automatic fastening device for live primary equipment terminal block bolts in substations according to claim 1, characterized in that: the upper end and the lower end of the movable tube on the threaded rod are respectively in threaded connection with a lower limiting nut and an upper limiting nut which are used for limiting the up-down stroke of the movable tube.
4. The automatic fastening device for live primary equipment terminal block bolts in substations according to claim 1, characterized in that: the locating part includes knee, gag lever post and magnetic path, and the lower extreme fixed mounting of gag lever post is in the upper end of knee and through the other end fixed connection of knee and underarm, and magnetic path fixed mounting is in the upper end of gag lever post, and the underarm adopts insulating material to make.
5. The automatic fastening device for live primary equipment terminal block bolts in substations according to claim 4, characterized in that: the magnetic block and the limiting rod are of hexagonal column structures.
6. The automatic fastening device for live primary equipment terminal block bolts in substations according to claim 1, characterized in that: fixed pipe round hole has been seted up to the one end at the horizontal pole, and fixed pipe's upper end upwards passes the horizontal pole round hole back fixed mounting of horizontal pole and manages the inside of round hole at fixed, and fixed pipe and horizontal pole all adopt insulating material to make.
7. The automatic fastening device for live primary equipment terminal block bolts in substations according to claim 1, characterized in that: the remote control electric torque wrench is characterized in that a remote control fan is fixedly installed at the upper end in the fixed pipe, air dispersing holes are uniformly formed in the side wall of the upper end of the fixed pipe and at the position right opposite to the lower end of the remote control electric torque wrench, the air dispersing holes and the lower end of the remote control electric torque wrench are located on the same horizontal line, and radiating fins capable of cooling surrounding air are fixedly installed in the fixed pipe and opposite to the air dispersing holes.
8. The automatic fastening device for live primary equipment terminal block bolts in substations according to claim 1, characterized in that: the upper end of the clamping seat is provided with two sides with inserting holes on the same horizontal line, the inside of the inserting holes is inserted with a fixed rod for preventing the remote control electric torque wrench from being separated upwards, and the lower end of the fixed rod is contacted with the upper surface of the remote control electric torque wrench.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011257870.9A CN112355974A (en) | 2020-11-12 | 2020-11-12 | Automatic fastening device for bolts of wiring board of live primary equipment in transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011257870.9A CN112355974A (en) | 2020-11-12 | 2020-11-12 | Automatic fastening device for bolts of wiring board of live primary equipment in transformer substation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112355974A true CN112355974A (en) | 2021-02-12 |
Family
ID=74516059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011257870.9A Pending CN112355974A (en) | 2020-11-12 | 2020-11-12 | Automatic fastening device for bolts of wiring board of live primary equipment in transformer substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112355974A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113263479A (en) * | 2021-03-08 | 2021-08-17 | 国网安徽省电力有限公司检修分公司 | Electrified high-voltage joint bolt fastening device of transformer substation |
| CN114012665A (en) * | 2021-11-12 | 2022-02-08 | 中国华冶科工集团有限公司 | High-strength bolt mounting device and mounting method thereof |
| CN115139261A (en) * | 2022-09-01 | 2022-10-04 | 天津航天机电设备研究所 | Expansion bolt reversing tool for space station target adapter |
-
2020
- 2020-11-12 CN CN202011257870.9A patent/CN112355974A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113263479A (en) * | 2021-03-08 | 2021-08-17 | 国网安徽省电力有限公司检修分公司 | Electrified high-voltage joint bolt fastening device of transformer substation |
| CN113263479B (en) * | 2021-03-08 | 2023-08-18 | 国网安徽省电力有限公司超高压分公司 | Electrified high-voltage connector bolt fastening device of transformer substation |
| CN114012665A (en) * | 2021-11-12 | 2022-02-08 | 中国华冶科工集团有限公司 | High-strength bolt mounting device and mounting method thereof |
| CN114012665B (en) * | 2021-11-12 | 2023-09-22 | 中国华冶科工集团有限公司 | High-strength bolt mounting device and mounting method thereof |
| CN115139261A (en) * | 2022-09-01 | 2022-10-04 | 天津航天机电设备研究所 | Expansion bolt reversing tool for space station target adapter |
| CN115139261B (en) * | 2022-09-01 | 2022-11-25 | 天津航天机电设备研究所 | Expansion bolt reversing tool for space station target adapter |
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