CN202964520U - Auxiliary tool for replacing PT (Potential Transformer) fuse - Google Patents
Auxiliary tool for replacing PT (Potential Transformer) fuse Download PDFInfo
- Publication number
- CN202964520U CN202964520U CN 201220602200 CN201220602200U CN202964520U CN 202964520 U CN202964520 U CN 202964520U CN 201220602200 CN201220602200 CN 201220602200 CN 201220602200 U CN201220602200 U CN 201220602200U CN 202964520 U CN202964520 U CN 202964520U
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- ratchet
- leading screw
- screw
- pawl
- fuse
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- 230000001681 protective effect Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000005516 engineering process 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
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Abstract
The utility model discloses an auxiliary tool for replacing a PT (Potential Transformer) fuse. The auxiliary tool is applied to replacement of the PT fuse in a power system. The auxiliary tool for replacing the PT fuse comprises a clamp with a leadscrew nut structure and an operation rod, wherein the operation rod is connected with a lead screw and is used for operating the lead screw to rotate; the clamp mainly comprises press plates and the lead screw; the screwing directions of the directions of threads at the upper end of the lead screw are opposite; the press plates are respectively arranged at two ends of the lead screw in a thread fit manner; the operation rod is connected to the middle position of the lead screw through a ratchet-pawl mechanism; the ratchet-pawl mechanism comprises a ratchet which is fixedly arranged at the middle position of the lead screw; a U-shaped pawl fixing seat sheathed on the lead screw is arranged on the outer side of the ratchet; a pawl is hinged in the pawl fixing seat; and a lifting pin supporting against the bottom of the pawl and a spring are arranged in the pawl fixing seat at the lower part of the pawl. According to the auxiliary tool disclosed by the utility model, the clamp with the leadscrew nut structure is controlled by the operation rod to clamp two ends of a fuse holder, and thus screws of the fuse holder can be flexibly screwed off; and the auxiliary tool can be operated by one person and is convenient in operation, simple and practical.
Description
Technical field
The utility model belongs to transformer station and safeguards construction field, is specifically related to a kind of PT fuse replacement aid.
Background technology
The PT insurance is a kind of safeties commonly used in power system, it is in the endoporus of an insulation magnetic tube, a protective tube to be set, the electric conductor place at protective tube two ends is provided with spring, be provided with the end cap that connects electric wire and push down the spring at protective tube two ends 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 inboard of flange is provided with catch, be bolted between catch and end cap, thereby end cap is fixed on the two ends of insulation magnetic tube, and protective tube is compressed.Center at the lateral surface of end cap also is provided with boss with holes, is used for connecting electric wire.In transformer station's regular maintenance, often need to change the PT insurance, because outdoor PT fuse replacement is more difficult, even two people change, because PT two ends spring force is very large, a people also handy very large power pins Insurance Block, can change.Add on the framework of operation activity space little, increased the danger of many people high-rise working.
The utility model content
The utility model technical issues that need to address are to provide a kind of simple and practical, PT fuse replacement aid of being convenient to the one man operation.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of PT fuse replacement aid, comprise the fixture of screw-nut structure and be connected with leading screw and be used for the action bars that the operation leading screw rotates, wherein fixture mainly is comprised of pressing plate and leading screw, the hand of spiral rotation direction of leading screw upper end is opposite, one end is dextrorotation, and an end is derotation; Pressing plate is two, is arranged on leading screw two ends by thread fiting mode respectively; Action bars is connected to the centre position of leading screw by ratchet and pawl arrangement.
The utility model is further to improve 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, the ratchet arranged outside has the ratchet holder of the U-shaped that is sleeved on leading screw, ratchet is hinged in the ratchet holder by the ratchet steady pin and rotates take the ratchet steady pin as axle, be provided with ejector pin and the spring of apical grafting bottom ratchet in the following ratchet holder of ratchet, ejector pin and spring are placed in the blind hole of ratchet holder bottom.
The utility model is further to improve to be: the ratchet holder both sides of described ratchet and pawl arrangement are provided with the circlip that is stuck on leading screw.
The utility model is further to improve to be: the top of described ratchet is to have accordingly the arcuate structure of two teeth with the ratchet cylindrical, and the bottom of ratchet is v-shaped structure, and the two sides of V-arrangement are the ejector pin working face.
The utility model is further to improve to be: the other end that described pressing plate is relative with a threaded end is fork configuration.
The utility model is further to improve to be: have draw-in groove on the circumference in the outside of described leading screw two end clamp plates, circlip is installed in draw-in groove.
The utility model is further to improve to be: the screw thread at described leading screw two ends is the internal thread that is arranged in the endoporus of leading screw two ends, is welded with respectively on described two block pressur plates by the screw-internal thread fit installation screw rod of screw thread with the leading screw two ends.
Owing to having adopted technique scheme, the technological progress that the utility model is obtained is: the utility model is controlled the feed screw nut fixture by action bars the two ends of PT Insurance Block is clamped, and with the spring-compressed in the PT insurance, make the bolt that connects end cap and catch not stressed, the screw of Insurance Block easily can be backed out, this device can the one man operation, and is easy to operate, simple and practical, a people insures with regard to replaceable PT.
Description of drawings
Fig. 1 is the utility model structural representation;
When Fig. 2 is the work of the utility model ratchet, the A-A of Fig. 1 is to structural representation;
Fig. 3 is the structural representation of the utility model Fig. 2 ratchet when not working;
Fig. 4 is the another kind of syndeton schematic diagram of leading screw of the present utility model and pressing plate;
Wherein, 1, pressing plate, 2, leading screw, 3, ratchet and pawl arrangement, 4, the ratchet holder, 5, ratchet, 6, action bars, 7, the ratchet steady pin, 8, ejector pin, 9, spring, 10, screw rod.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is described in further details.
A kind of PT fuse replacement aid, as shown in Figure 1, the utility model mainly is made of fixture, action bars 6 and the ratchet and pawl arrangement 3 of screw-nut structure, comprise leading screw 2, be arranged on the pressing plate 1 at leading screw two ends and be connected the action bars 6 that operation leading screw 2 rotates that is used for that connects with leading screw, action bars 6 is connected by ratchet and pawl arrangement 3 connections with leading screw, for the clamping of chucking operation, unclamp.Fixture mainly is comprised of pressing plate 1 and leading screw 2, the other end that described pressing plate 1 is relative with a threaded end is fork configuration, pressing plate 1 is used for compressing the end cap at PT insurance two ends, the groove of the fork configuration of pressing plate covers the wiring projection with the PT guard terminal and coordinates, so that the integral body of end cap can be subject to uniform pressure.One section of leading screw 2 mid portion is polished rod, is used for fixed ratchet wheel detent mechanism 3, and leading screw 2 two ends are screw thread, and the hand of spiral rotation direction is opposite, and an end is dextrorotation, and an end is derotation; Pressing plate is two, has screwed hole on pressing plate 1, and one of them is the dextrorotation screw thread, and one for the derotation screw thread, and two block pressur plates 1 are arranged on leading screw 2 two ends by thread fiting mode respectively, consist of screw-nut structure.Have draw-in groove on the circumference in the outside of 2 liang of end clamp plates of leading screw, circlip is installed in draw-in groove, make the pressing plate can 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 that ratchet and pawl arrangement 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 the 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 that is stuck on leading screw 2, this circlip is stuck in circlip slot on leading screw, ratchet holder 4, ratchet, ratchet 5 etc. are fixed on the centre position of screw mandrel, can the 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, the top of ratchet 5 is to have accordingly the arcuate structure of two teeth with the ratchet cylindrical, the bottom of ratchet 5 is v-shaped structure, the two sides of V-arrangement are the ejector pin working face, the use working face when two working faces are respectively the leading screw rotating after the ratchet commutation.Be provided with ejector pin 8 and spring 9 with ratchet 5 bottom apical graftings in the following ratchet holder 4 of ratchet 5, 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 of ratchet holder 4 bottoms.
For guarantee pressing plate 1 not can because of pine too much, break away from leading screw when perhaps adjusting at ordinary times, leading screw 2 ends, two ends have radially draw-in groove, installation circlip in draw-in groove.
Operation principle of the present utility model is as follows: when the utility model is installed, first ratchet is fixed on leading screw, then ratchet and pawl arrangement installed, and the circlip card is good, rear installation pressing plate is installed the circlip that stops pressing plate at last.
When changing insurance, block the end cap at PT insurance two ends with pressing plate, the rotating operation bar, utilize pressing plate that the end cap that PT insures two ends is clamped, at this moment, the connecting bolt between end cap and catch no longer is subjected to the active force of the spring in the PT insurance, can easily turn on bolt, open end cap, remove the protective tube that burns.And then with the ratchet commutation, then by action bars, pressing plate outwards moves, two end caps that PT is insured unclamp, and the insurance of fusing is taken out, and change qualified insurance, repeat above step, with bolted.
The difference of the present embodiment and embodiment 1 is: the screw thread at described leading screw 2 two ends is the internal thread that is arranged in the endoporus of leading screw two ends, is welded with respectively on described two block pressur plates by the screw-internal thread fit at screw thread and leading screw two ends screw rod 10 is installed, as described in Figure 4.Two ends at leading screw 2 no longer arrange circlip.
Claims (7)
1. PT fuse replacement aid, it is characterized in that: comprise the fixture of screw-nut structure and be connected 2 with leading screw) connect for the action bars (6) that operates leading screw (2) rotation, wherein fixture mainly is comprised of pressing plate (1) and leading screw (2), the hand of spiral rotation direction at leading screw (2) two ends is opposite, one end is dextrorotation, and an end is derotation; Pressing plate is two, is arranged on leading screw (2) two ends by thread fiting mode respectively; Action bars is connected to the centre position of leading screw (2) by ratchet and pawl arrangement (3).
2. a kind of PT fuse replacement aid according to claim 1, it is characterized in that 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 arranged outside has the ratchet holder (4) that is sleeved on the U-shaped on leading screw (2), ratchet (5) is hinged in ratchet holder (4) by ratchet steady pin (7) and rotates take ratchet steady pin (7) as axle, be provided with ejector pin (8) and the spring (9) of apical grafting bottom ratchet (5) in the following ratchet holder (4) of ratchet (5), ejector pin (8) and spring (9) are placed in the blind hole of ratchet holder (4) bottom.
3. a kind of PT fuse replacement aid according to claim 2 is characterized in that ratchet holder (4) both sides of described ratchet and pawl arrangement (3) are provided with the circlip that is stuck on leading screw (2).
4. a kind of PT fuse replacement aid according to claim 2, it is characterized in that the top of described ratchet (5) is to have accordingly the arcuate structure of two teeth with the ratchet cylindrical, the bottom of ratchet (5) is v-shaped structure, and the two sides of V-arrangement are the ejector pin working face.
5. a kind of PT fuse replacement aid according to claim 1, is characterized in that described pressing plate (1) other end relative with a threaded end is fork configuration.
6. a kind of PT fuse replacement aid according to claim 1 is characterized in that having draw-in groove on the circumference in the outside of described leading screw (2) two end clamp plates, and circlip is installed in draw-in groove.
7. 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 the internal thread that is arranged in the endoporus of leading screw two ends, is welded with respectively on described two block pressur plates by the screw-internal thread fit at screw thread and leading screw two ends screw rod (10) is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220602200 CN202964520U (en) | 2012-11-15 | 2012-11-15 | Auxiliary tool for replacing PT (Potential Transformer) fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220602200 CN202964520U (en) | 2012-11-15 | 2012-11-15 | Auxiliary tool for replacing PT (Potential Transformer) fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202964520U true CN202964520U (en) | 2013-06-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220602200 Expired - Fee Related CN202964520U (en) | 2012-11-15 | 2012-11-15 | Auxiliary tool for replacing PT (Potential Transformer) fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202964520U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102950570A (en) * | 2012-11-15 | 2013-03-06 | 赞皇县供电公司 | PT (Potential Transformer) fuse replacement auxiliary tool |
| CN103481240A (en) * | 2013-09-23 | 2014-01-01 | 华南理工大学 | Auxiliary pasting and dismantling device for bridge monitoring vibrating wire sensor |
| CN104340922A (en) * | 2013-08-06 | 2015-02-11 | 中国石油化工集团公司 | Portable position regulation mechanism |
| CN105415003A (en) * | 2015-11-26 | 2016-03-23 | 安徽鼎远金属制品有限公司 | Clamping seat for inner damping sleeve |
| CN107160325A (en) * | 2017-06-09 | 2017-09-15 | 国网辽宁省电力有限公司朝阳供电公司 | A kind of powered device and method for winning R type spring catch |
-
2012
- 2012-11-15 CN CN 201220602200 patent/CN202964520U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102950570A (en) * | 2012-11-15 | 2013-03-06 | 赞皇县供电公司 | PT (Potential Transformer) fuse replacement auxiliary tool |
| CN102950570B (en) * | 2012-11-15 | 2015-03-11 | 赞皇县供电公司 | PT (Potential Transformer) fuse replacement auxiliary tool |
| CN104340922A (en) * | 2013-08-06 | 2015-02-11 | 中国石油化工集团公司 | Portable position regulation mechanism |
| CN103481240A (en) * | 2013-09-23 | 2014-01-01 | 华南理工大学 | Auxiliary pasting and dismantling device for bridge monitoring vibrating wire sensor |
| CN105415003A (en) * | 2015-11-26 | 2016-03-23 | 安徽鼎远金属制品有限公司 | Clamping seat for inner damping sleeve |
| CN107160325A (en) * | 2017-06-09 | 2017-09-15 | 国网辽宁省电力有限公司朝阳供电公司 | A kind of powered device and method for winning R type spring catch |
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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: 20130605 Termination date: 20151115 |
|
| EXPY | Termination of patent right or utility model |