CN102950570B - PT (Potential Transformer) fuse replacement auxiliary tool - Google Patents
PT (Potential Transformer) fuse replacement auxiliary tool Download PDFInfo
- Publication number
- CN102950570B CN102950570B CN201210458748.7A CN201210458748A CN102950570B CN 102950570 B CN102950570 B CN 102950570B CN 201210458748 A CN201210458748 A CN 201210458748A CN 102950570 B CN102950570 B CN 102950570B
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- China
- Prior art keywords
- ratchet
- leading screw
- screw
- lead screw
- pawl
- 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
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- 230000001681 protective effect Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Abstract
The invention discloses a PT (Potential Transformer) fuse replacement auxiliary tool, which is applied to replacement of a PT fuse in a power system. The PT fuse replacement auxiliary tool comprises a clamp of a lead screw nut structure and an operating rod, wherein the operating rod is connected with a lead screw for operating the lead screw to rotate; the clamp mainly consists of pressing plates and a lead screw; the turning direction of the thread direction at the upper end of the lead screw is reverse; the pressing plates are arranged at the two ends of the lead screw in a threaded matching mode respectively; the operating rod is connected to a middle position of the lead screw through a ratchet and pawl mechanism; the ratchet and pawl mechanism comprises a ratchet which is fixedly arranged at a middle position of the lead screw; a U-shaped pawl fixing seat which is sleeved on the lead screw is arranged outside the ratchet; a pawl is hinged in a pawl fixing seat; and a lifting pin and a spring which are butted against the bottom of the pawl are arranged in the pawl fixing seat below the pawl. According to the PT fuse replacement auxiliary tool, the two ends of a fuse seat are clamped by controlling the lead screw nut clamp through the operating rod, so that a screw of the fuse seat can be easily screwed off; and the PT fuse replacement auxiliary tool can be operated by a single person, is convenient to operate and is simple and practical.
Description
Technical field
The invention belongs to transformer station and safeguard construction field, be specifically related to a kind of PT fuse replacement aid.
Background technology
PT insurance is a kind of safeties conventional in power system, it arranges a protective tube in the endoporus of an insulation magnetic tube, the electric conductor place at protective tube two ends is provided with spring, the end cap of the spring connecting electric wire and push down protective tube two ends is provided with at the two ends of insulation magnetic tube, respectively there is flange at the two ends of insulation magnetic tube, end cap is positioned at the outside of flange, the inner side of flange is provided with catch, be bolted between catch and end cap, thus end cap is fixed on the two ends of insulation magnetic tube, and protective tube is compressed.Boss with holes is also provided with, for connecting electric wire at the center of the lateral surface of end cap.In transformer station's regular maintenance, often need to change PT insurance, because outdoor PT fuse replacement is more difficult, even if two people change, because PT two ends spring force is very large, a people also handy very large power pins Insurance Block, can change.On the framework of adding operation, activity space is little, adds the danger of many people high-rise working.
Summary of the invention
The technical issues that need to address of the present invention are to provide a kind of simple and practical, PT fuse replacement aid of being convenient to one man operation.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of PT fuse replacement aid, the fixture comprising screw-nut structure and the action bars be connected with leading screw for operating screw turns, wherein fixture is primarily of pressing plate and leading screw composition, the hand of spiral rotation direction of leading screw upper end is contrary, one end is dextrorotation, and one end is derotation; Pressing plate is two pieces, is arranged on leading screw two ends respectively by thread fiting mode; Action bars is connected to the centre position of leading screw by ratchet and pawl arrangement.
The present invention improves further to be: described ratchet and pawl arrangement comprises ratchet, ratchet steady pin, ejector pin, spring, is fixed on the ratchet in leading screw centre position, ratchet arranged outside has the ratchet holder of the U-shaped be sleeved on leading screw, ratchet to be hinged in ratchet holder by ratchet steady pin and with ratchet steady pin for axle rotates, be provided with in ratchet holder below ratchet with ratchet bottom the ejector pin of apical grafting and spring, ejector pin and spring are placed in the blind hole bottom ratchet holder.
The present invention improves to be further: the ratchet holder both sides of described ratchet and pawl arrangement are provided with the circlip be stuck on leading screw.
The present invention improves to be further: be the arcuate structure with two teeth corresponding to ratchet cylindrical above described ratchet, the bottom of ratchet is v-shaped structure, and the two sides of V-arrangement are ejector pin working face.
The present invention improves to be further: the other end that described pressing plate is relative with threaded one end is fork configuration.
The present invention improves further to be: the outside of described leading screw two end clamp plate circumferentially have draw-in groove, in draw-in groove, circlip is installed.
The present invention improves to be further: the screw thread at described leading screw two ends is be arranged on the internal thread in the endoporus of leading screw two ends, described two block pressur plates is welded with respectively and installs screw rod by the screw-internal thread fit at screw thread and leading screw two ends.
Owing to have employed technique scheme, the technological progress that the present invention obtains is: the present invention controls feed screw nut fixture by action bars and clamped at the two ends of PT Insurance Block, and the spring-compressed in PT is insured, make the bolt of connection end cap and catch not stressed, the screw of Insurance Block easily can be backed out, this device can one man operation, easy to operate, simple and practical, a people insures with regard to replaceable PT.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
When Fig. 2 is ratchet of the present invention work, the A-A of Fig. 1 is to structural representation;
Fig. 3 is the structural representation of Fig. 2 ratchet of the present invention when not working;
Fig. 4 is the another kind of syndeton schematic diagram of leading screw of the present invention and pressing plate;
Wherein, 1, pressing plate, 2, leading screw, 3, ratchet and pawl arrangement, 4, ratchet holder, 5, ratchet, 6, action bars, 7, ratchet steady pin, 8, ejector pin, 9, spring, 10, screw rod.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further details.
Embodiment 1
A kind of PT fuse replacement aid, as shown in Figure 1, the present invention is formed primarily of the fixture of screw-nut structure, action bars 6 and ratchet and pawl arrangement 3, the action bars 6 for operating leading screw 2 rotation comprising leading screw 2, be arranged on the pressing plate 1 at leading screw two ends and be connected with leading screw 2, action bars 6 is connected with leading screw 2 by ratchet and pawl arrangement 3, for chucking operation clamping, unclamp.Fixture forms primarily of pressing plate 1 and leading screw 2, the other end that described pressing plate 1 is relative with threaded one end is fork configuration, pressing plate 1 insures the end cap at two ends for compressing PT, groove and the PT guard terminal of the fork configuration of pressing plate cover wiring projection and coordinate, and are subject to uniform pressure to enable the entirety of end cap.Leading screw 2 mid portion one section is polished rod, and for fixed ratchet wheel detent mechanism 3, leading screw 2 two ends are screw thread, and hand of spiral rotation direction is contrary, and one end is dextrorotation, and one end is derotation; Pressing plate is two pieces, and pressing plate 1 has screwed hole, and one of them is dextrorotation screw thread, and one is derotation screw thread, and two block pressur plates 1 are arranged on leading screw 2 two ends respectively by thread fiting mode, forms screw-nut structure.The outside of leading screw 2 liang of end clamp plates circumferentially have draw-in groove, in draw-in groove, circlip is installed, makes pressing plate can not self falling.Action bars is connected to the centre position of leading screw (2) by ratchet and pawl arrangement (3).
The structure of above-mentioned ratchet and pawl arrangement 3 enters shown in Fig. 2,3.Ratchet and pawl arrangement comprises ratchet and pawl arrangement and comprises ratchet 5, ratchet steady pin 7, ejector pin 8, spring 9, ratchet, ratchet holder 4, ratchet is fixed on the centre position of leading screw 2, ratchet holder 4 is U-shaped structure, ratchet holder 4 is sleeved on the outside of ratchet on leading screw 2, ratchet holder 4 both sides are provided with the circlip be stuck on leading screw 2, this circlip is stuck in the circlip slot on leading screw, ratchet holder 4, ratchet, ratchet 5 etc. to be fixed on the centre position of screw mandrel, can not left and right play.
Ratchet 5 is fixed between two side plates in ratchet holder 4 by ratchet steady pin 7, ratchet 5 can be that axle freely rotates along ratchet steady pin 7, be the arcuate structure with two teeth corresponding to ratchet cylindrical above ratchet 5, the bottom of ratchet 5 is v-shaped structure, the two sides of V-arrangement are ejector pin working face, use working face when two working faces are respectively leading screw rotating after ratchet commutation.Be provided with in ratchet holder 4 below ratchet 5 with ratchet 5 bottom the ejector pin 8 of apical grafting and spring 9, during work, one side in the bottom chevron shaped two sides of ratchet is withstood by ejector pin 8 and the following spring 9 of ejector pin, and ejector pin 8 and spring 9 are placed in the blind hole bottom ratchet holder 4.
In order to ensure that pressing plate 1 can not too much because of pine, or departs from leading screw during adjustment at ordinary times, end, leading screw 2 two ends has radial draw-in groove, draw-in groove interior installation circlip.
Operation principle of the present invention is as follows: when the present invention installs, and is first fixed on leading screw by ratchet, then is installed by ratchet and pawl arrangement, and circlip card is good, rear installation pressing plate, finally installs the circlip stopping pressing plate.
When changing insurance, the end cap that PT insures two ends is blocked with pressing plate, rotating operation bar, pressing plate is utilized PT to be insured the end cap clamping at two ends, now, the connecting bolt between end cap and catch, can light unthread bolts no longer by the active force of spring in PT insurance, open end cap, remove the protective tube burnt.And then commutated by ratchet, then by action bars, pressing plate is movement outwards, is unclamped by two end caps that PT insures, and the insurance of fusing is taken out, changes qualified insurance, repeat above step, by bolted.
Embodiment 2
The difference of the present embodiment and embodiment 1 is: the screw thread at described leading screw 2 two ends is be arranged on the internal thread in the endoporus of leading screw two ends, described two block pressur plates is welded with respectively and installs screw rod 10 by the screw-internal thread fit at screw thread and leading screw two ends, as described in Figure 4.At the two ends of leading screw 2, no longer circlip is set.
Claims (4)
1. a PT fuse replacement aid, it is characterized in that: comprise the fixture of screw-nut structure and be connected the action bars (6) rotated for operating leading screw (2) with leading screw (2), wherein fixture is primarily of pressing plate (1) and leading screw (2) composition, the hand of spiral rotation direction at leading screw (2) two ends is contrary, one end is dextrorotation, and one end is derotation; Pressing plate is two pieces, is arranged on leading screw (2) two ends respectively by thread fiting mode; Action bars is connected to the centre position of leading screw (2) by ratchet and pawl arrangement (3);
Described ratchet and pawl arrangement (3) comprises ratchet (5), ratchet steady pin (7), ejector pin (8), spring (9), be fixed on the ratchet in leading screw (2) centre position, the ratchet holder (4) of U-shaped, described ratchet holder (4) is sleeved on the leading screw (2) outside ratchet, ratchet (5) to be hinged in ratchet holder (4) by ratchet steady pin (7) and with ratchet steady pin (7) for axle rotates, be provided with in ratchet holder (4) below ratchet (5) and the ejector pin (8) of ratchet (5) bottom apical grafting and spring (9), ejector pin (8) and spring (9) are placed in the blind hole of ratchet holder (4) bottom,
Ratchet holder (4) both sides of described ratchet and pawl arrangement (3) are provided with the circlip be stuck on leading screw (2);
Be the arcuate structure with two teeth corresponding to ratchet cylindrical above described ratchet (5), the bottom of ratchet (5) is v-shaped structure, and the two sides of V-arrangement are ejector pin working face.
2. a kind of PT fuse replacement aid according to claim 1, is characterized in that the other end that described pressing plate (1) is relative with threaded one end is fork configuration.
3. a kind of PT fuse replacement aid according to claim 1, what it is characterized in that the outside of described leading screw (2) two end clamp plate circumferentially has draw-in groove, installs circlip in draw-in groove.
4. a kind of PT fuse replacement aid according to claim 1, it is characterized in that: the screw thread at described leading screw (2) two ends is be arranged on the internal thread in the endoporus of leading screw two ends, described two block pressur plates are welded with respectively and by the screw-internal thread fit at screw thread and leading screw two ends, screw rod (10) are installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210458748.7A CN102950570B (en) | 2012-11-15 | 2012-11-15 | PT (Potential Transformer) fuse replacement auxiliary tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210458748.7A CN102950570B (en) | 2012-11-15 | 2012-11-15 | PT (Potential Transformer) fuse replacement auxiliary tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102950570A CN102950570A (en) | 2013-03-06 |
| CN102950570B true CN102950570B (en) | 2015-03-11 |
Family
ID=47760257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210458748.7A Expired - Fee Related CN102950570B (en) | 2012-11-15 | 2012-11-15 | PT (Potential Transformer) fuse replacement auxiliary tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102950570B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105870820A (en) * | 2016-06-02 | 2016-08-17 | 国网新疆电力公司奎屯供电公司 | Replacing tool special for 35 KV outdoor PT fuse |
| CN106644370A (en) * | 2016-11-22 | 2017-05-10 | 中国空气动力研究与发展中心低速空气动力研究所 | Wind tunnel test model assembly and disassembly assistance system |
| CN108851829B (en) * | 2018-06-15 | 2024-03-08 | 南京冠茂电子科技有限公司 | Finance business place safety integral counter |
| CN110098574B (en) * | 2019-05-31 | 2024-04-19 | 国网江苏省电力有限公司徐州供电分公司 | Auxiliary mechanism for replacing high-pressure protective tube |
| CN112828809B (en) * | 2020-12-31 | 2023-02-28 | 上海新昇半导体科技有限公司 | Fixed wrench and workpiece fixing method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1380328A (en) * | 1920-02-25 | 1921-05-31 | George T Wroughton | Valve-spring lifter for internal-combustion engines |
| US1384969A (en) * | 1919-12-01 | 1921-07-19 | Otsuka Teruyoshi | Valve-lifter |
| US1451715A (en) * | 1921-05-05 | 1923-04-17 | Seppmann Alfred Bruno | Valve cage vise and spring remover |
| US5036573A (en) * | 1989-11-20 | 1991-08-06 | Congdon Thomas E | Holland fifth wheel cylinder removal tool |
| CN2592329Y (en) * | 2003-01-22 | 2003-12-17 | 张志强 | Combined push-pull boosting apparatus |
| CN201291443Y (en) * | 2008-10-27 | 2009-08-19 | 浙江吉利汽车有限公司 | Interspace regulating device |
| CN201833327U (en) * | 2010-10-09 | 2011-05-18 | 井陉县供电公司 | Replacement auxiliary fixture for T-type safety device |
| CN201846005U (en) * | 2010-11-02 | 2011-05-25 | 宁夏电力公司银川供电局 | Tool for replacing fuse of outdoor voltage transformer |
| CN202964520U (en) * | 2012-11-15 | 2013-06-05 | 赞皇县供电公司 | Auxiliary tool for replacing PT (Potential Transformer) fuse |
-
2012
- 2012-11-15 CN CN201210458748.7A patent/CN102950570B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1384969A (en) * | 1919-12-01 | 1921-07-19 | Otsuka Teruyoshi | Valve-lifter |
| US1380328A (en) * | 1920-02-25 | 1921-05-31 | George T Wroughton | Valve-spring lifter for internal-combustion engines |
| US1451715A (en) * | 1921-05-05 | 1923-04-17 | Seppmann Alfred Bruno | Valve cage vise and spring remover |
| US5036573A (en) * | 1989-11-20 | 1991-08-06 | Congdon Thomas E | Holland fifth wheel cylinder removal tool |
| CN2592329Y (en) * | 2003-01-22 | 2003-12-17 | 张志强 | Combined push-pull boosting apparatus |
| CN201291443Y (en) * | 2008-10-27 | 2009-08-19 | 浙江吉利汽车有限公司 | Interspace regulating device |
| CN201833327U (en) * | 2010-10-09 | 2011-05-18 | 井陉县供电公司 | Replacement auxiliary fixture for T-type safety device |
| CN201846005U (en) * | 2010-11-02 | 2011-05-25 | 宁夏电力公司银川供电局 | Tool for replacing fuse of outdoor voltage transformer |
| CN202964520U (en) * | 2012-11-15 | 2013-06-05 | 赞皇县供电公司 | Auxiliary tool for replacing PT (Potential Transformer) fuse |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102950570A (en) | 2013-03-06 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| 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: 20150311 Termination date: 20151115 |
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| EXPY | Termination of patent right or utility model |