CN213340272U - Coal mine overvoltage-preventing fusing device convenient to replace - Google Patents
Coal mine overvoltage-preventing fusing device convenient to replace Download PDFInfo
- Publication number
- CN213340272U CN213340272U CN202022797587.7U CN202022797587U CN213340272U CN 213340272 U CN213340272 U CN 213340272U CN 202022797587 U CN202022797587 U CN 202022797587U CN 213340272 U CN213340272 U CN 213340272U
- Authority
- CN
- China
- Prior art keywords
- fixedly connected
- block
- rod
- limiting
- spring
- 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.)
- Active
Links
- 239000003245 coal Substances 0.000 title claims abstract description 18
- 230000001681 protective effect Effects 0.000 claims abstract description 23
- 238000009434 installation Methods 0.000 claims abstract description 8
- 229910052573 porcelain Inorganic materials 0.000 claims description 14
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 2
- 230000004927 fusion Effects 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000003044 adaptive effect Effects 0.000 abstract description 3
- 230000006978 adaptation Effects 0.000 description 6
- 230000005484 gravity Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
Images
Abstract
The utility model discloses an overvoltage-preventing fusing device for coal mine convenient to replace, which relates to the technical field of coal mine safety production devices and aims at solving the problem of inconvenient installation and replacement in the prior art, the following proposal is provided, comprising a protective box, wherein both sides of the protective box are both fixed with a conduit, a placing plate fixedly connected with the protective box is arranged between the conduits, a moving block arranged in parallel is slidably connected on the placing plate, two moving blocks are both provided with an installation device, the installation device is connected with a third conductive block fixedly connected with the moving block through an electric wire, a contact block is slidably sleeved in the third conductive block, one side of the contact block is fixedly connected with an adaptive block slidably connected with the protective box, the utility model has simple structure and convenient use, and the limiting device, the installation device, the moving block and the like are mutually matched, so that under the condition of no power failure, the fusing device is disassembled, replaced and installed, and the overall maintenance process is facilitated.
Description
Technical Field
The utility model relates to a colliery safety in production technical field especially relates to a colliery is with preventing excessive pressure fuse device convenient to change.
Background
The basic principle of overvoltage fusing is that when the current is increased to a certain value, the temperature of the metal wire sheet is increased to the fusing temperature of the metal wire sheet to fuse, so that the current is cut off, and the purpose of short-circuit protection is achieved.
In the production and mining process of colliery, because the use of multiple electricity or the change of voltage for electric current produces the change in the circuit, when electrical apparatus control became invalid, can fuse, in order to reach final guarantee effect, but in the use of reality, after fuse fusing, need cut off the power supply to whole device, then carry out new fuse and change, make whole change process comparatively loaded down with trivial details, increase maintenance duration, make whole engineering delay.
SUMMERY OF THE UTILITY MODEL
The utility model provides a pair of colliery is with preventing excessive pressure fuse device convenient to change has solved the installation and has changed inconvenient problem.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the overvoltage and fuse preventing device for the coal mine convenient to replace comprises a protective box, wherein wire conduits are fixed on two sides of the protective box, a placing plate fixedly connected with the protective box is arranged between the two wire conduits, moving blocks arranged in parallel are connected on the placing plate in a sliding manner, mounting devices are arranged on the two moving blocks, the mounting devices are connected with a third conductive block fixedly connected with the moving blocks through wires, a contact block is sleeved in the third conductive block in a sliding manner, an adaptive block slidably connected with the protective box is fixedly connected with one side of the contact block, a second spring fixedly connected with the protective box is fixedly connected with one side of the adaptive block, a connecting sleeve is sleeved on one of the moving blocks in a threaded manner, a third spring is fixedly connected in the connecting sleeve, and the other end of the third spring is connected with a connecting column slidably sleeved with the connecting sleeve, one end of the connecting column is in threaded sleeve joint with the other moving block, the two moving blocks are fixedly connected with function rods, one side of each function rod is fixedly connected with a contact strip electrically connected with the mounting device, the two moving blocks are fixedly connected with limiting plates, limiting devices are arranged on the limiting plates, one side of the protection box is rotatably connected with an opening door, and one side of the opening door is provided with a jacking block in contact with the limiting devices.
Preferably, the mounting device includes a porcelain rod slidably sleeved with the moving block, a first spring fixedly connected with the moving block is fixedly connected to both sides of the porcelain rod, a first connecting block is fixedly connected to the bottom end of the porcelain rod, a first conductive block fixedly connected with the moving block is slidably sleeved on the outer wall of the first connecting block, a connecting rod slidably sleeved with the moving block is fixedly connected to the lower side of the first connecting block, a second connecting block is fixedly connected to the other end of the connecting rod, a second conductive block fixedly connected with the moving block is slidably sleeved on the outer wall of the second connecting block, the second conductive block is connected with a third conductive block through an electric wire, and the first conductive block is connected with the electric shock strip through an electric wire.
Preferably, the first conductive block and the second conductive block are both provided with a connecting hole, and the moving block is provided with an inlet hole communicated with the connecting hole.
Preferably, the limiting device comprises an upper extending plate and a lower extending plate which are respectively fixedly connected with the two limiting plates, the upper side of the upper extending plate is fixedly connected with a fourth spring, the upper end of the fourth spring is fixedly connected with a limiting rod, the bottom end of the limiting rod is connected with a jacking rod which is in sliding sleeve connection with the lower extending plate, and the jacking rod is in sliding connection with a jacking block.
Preferably, go up extension plate and lower extension plate and all be provided with the limited hole, the one end of limiting rod and jack-up pole all is located the limited hole, the outer wall fixedly connected with safety block of limiting rod, be provided with the safety groove down in the extension plate, the safety block is with the cell wall sliding connection of mounting groove.
Preferably, the protection box is fixedly connected with a fifth spring, the other end of the fifth spring is fixedly connected with a maintaining and stabilizing block in sliding sleeve joint with the protection box, and the other end of the maintaining and stabilizing block is fixedly connected with a maintaining and stabilizing rod in sliding sleeve joint with the moving block.
Preferably, one side of the conduit is provided with a communicating pipe fixedly connected with the protective box, a plurality of sixth springs are fixedly connected in the communicating pipe, and the other ends of the sixth springs are fixedly connected with an arc-shaped plate located in the communicating pipe.
The utility model has the advantages that:
1. through the mutual matching of the movable block matching limiting device, the mounting device, the movable block and the like, the fusing device can be detached, replaced and mounted under the condition of no power failure, and the process of overall maintenance is facilitated.
2. Through the cooperation such as door opening and limiting device, can just switch on the circuit when closing the door, the maintenance workman's of assurance safety installs two fusible links simultaneously, increases factor of safety.
Drawings
Fig. 1 is a schematic cross-sectional front view of an overvoltage protection fuse device for a coal mine, which is convenient to replace according to the present invention;
fig. 2 is a left side cross-sectional view of the overvoltage protection fuse device for coal mine convenient to replace according to the present invention;
FIG. 3 is a schematic top cross-sectional view of an easy-to-replace over-voltage fuse protector for coal mines according to the present invention;
fig. 4 is an enlarged schematic view of a place a of the overvoltage protection fuse device for coal mine convenient to replace, which is provided by the utility model;
fig. 5 is an enlarged schematic view of a place B of the overvoltage-preventing fusing device for coal mine, which is convenient to replace;
fig. 6 is the utility model provides a coal mine is with preventing that excessive pressure fusing device's C department enlargies the schematic diagram convenient to change.
Reference numbers in the figures: 1. a protective box; 2. a fifth spring; 3. maintaining and stabilizing the blocks; 4. a function lever; 5. a limiting plate; 6. a moving block; 7. maintaining and stabilizing the rod; 8. a communicating pipe; 9. connecting columns; 10. connecting sleeves; 11. placing the plate; 12. an adaptation block; 13. a second spring; 14. a conduit; 15. a porcelain rod; 16. opening the door; 17. a touch strip; 20. a first spring; 22. a first conductive block; 23. a connecting rod; 24. a first connection block; 25. an access hole; 26. a second conductive block; 27. a second connecting block; 28. a contact block; 29. a third conductive block; 30. a lower extension plate; 31. jacking up the rod; 32. ejecting the block; 33. a fourth spring; 34. a restraining bar; 35. an upper extension plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-6, an overvoltage-preventing fusing device for coal mine convenient to replace comprises a protective box 1, wherein wire conduits 14 are fixed on both sides of the protective box 1, a placing plate 11 fixedly connected with the protective box 1 is arranged between the two wire conduits 14, parallel moving blocks 6 are connected on the placing plate 11 in a sliding manner, mounting devices are arranged on the two moving blocks 6, the mounting devices are connected with third conductive blocks 29 fixedly connected with the moving blocks 6 through wires, contact blocks 28 are sleeved in the third conductive blocks 29 in a sliding manner, one side of each contact block 28 is fixedly connected with an adapting block 12 slidably connected with the protective box 1, one side of each adapting block 12 is fixedly connected with a second spring 13 fixedly connected with the protective box 1, one of the moving blocks 6 is sleeved with a connecting sleeve 10 in a threaded manner, a third spring is fixedly connected in the connecting sleeve 10, and the other end of the third spring is connected with a connecting column 9 slidably sleeved with the connecting sleeve 10, one end of a connecting column 9 is in threaded sleeve joint with another moving block 6, a function rod 4 is fixedly connected to each of the two moving blocks 6, an electric shock strip 17 electrically connected with a mounting device is fixedly connected to one side of each function rod 4, limiting plates 5 are fixedly connected to the two moving blocks 6, limiting devices are arranged on the limiting plates 5, an opening door 16 is rotatably connected to one side of the protection box 1, and a jacking block 32 in contact with the limiting devices is arranged on one side of the opening door 16.
After the work fuse is broken, the opening door 16 is opened, then the limiting device is contacted, the moving block 6 is taken out through the limiting plate 5 connected with the limiting device, then the whole device is taken out, then the device is wave-mounted on the outer side of the protection box 1, the fused fuse is taken out, then a new fuse is mounted through the limiting device, then the two moving blocks 6 are extruded, the two moving blocks 6 are moved oppositely, the two moving blocks 6 are relatively limited through the limiting device, the adaptation block 12 is pushed by the elastic force of the second spring 13, the adaptation block 12 is moved oppositely, a specified position is reached, at the moment, the limiting device is held, then the moving block 6 is moved, one side of the moving block 6 is contacted with the contact block 28, at the moment, the zero line and the live line are respectively contacted with the two moving blocks 6 to realize conduction, at the moment, the two contact strips 17 are not contacted, the whole circuit is still, the whole door 16 is opened, the top opening block 32 contacts the limiting device at the moment, the state of the limiting device is changed, the moving sleeve 10 and the connecting rod 9 move relatively at the moment through the elastic force of the third spring, the two moving blocks 6 move relatively, the two contact strips 17 are contacted with each other, the whole circuit forms a passage, when the current is higher than a certain fixed value again, the fuse wires on the two sides are respectively fused, and the safety coefficient is increased.
The mounting device comprises a porcelain rod 15 which is in sliding sleeve joint with a moving block 6, two sides of the porcelain rod 15 are fixedly connected with a first spring 20 which is fixedly connected with the moving block 6, the bottom end of the porcelain rod 15 is fixedly connected with a first connecting block 24, the outer wall of the first connecting block 24 is in sliding sleeve joint with a first conductive block 22 which is fixedly connected with the moving block 6, the lower part of the first connecting block 24 is fixedly connected with a connecting rod 23 which is in sliding sleeve joint with the moving block 6, the other end of the connecting rod 23 is fixedly connected with a second connecting block 27, the outer wall of the second connecting block 27 is in sliding sleeve joint with a second conductive block 26 which is fixedly connected with the moving block 6, the second conductive block 26 is connected with a third conductive block 29 through an electric wire, the first conductive block 22 is connected with an electric shock strip 17 through an electric wire, connecting holes are arranged in the first conductive block 22 and the second conductive block 26, an inlet, when the fuse is installed, the porcelain rod 15 is pulled, the first connecting block 24 and the second connecting block 27 are moved under the driving of the porcelain rod 15 and the connecting rod 23, so that the connecting holes and the access holes 25 on the movement of the first connecting block 24 and the second connecting block 27 are communicated with each other, at the moment, two ends of the fuse which is cut in the early stage respectively enter the first connecting block 24 and the second connecting block 27 through the access holes 25, then the pulling rod 15 is loosened, under the action of the first spring 20, the first connecting block 24 and the second connecting block 27 move downwards, meanwhile, the fuse is tensioned, and timely disconnection in melting is guaranteed.
The limiting device comprises an upper extending plate 35 and a lower extending plate 30 which are fixedly connected with two limiting plates 5 respectively, a fourth spring 33 is fixedly connected on the upper side of the upper extending plate 35, a limiting rod 34 is fixedly connected on the upper end of the fourth spring 33, a jacking rod 31 which is slidably sleeved on the lower extending plate 30 is connected at the bottom end of the limiting rod 34, the jacking rod 31 is slidably connected with a jacking block 32, the upper extending plate 35 and the lower extending plate 30 are both provided with limiting holes, one end of the limiting rod 34 and one end of the jacking rod 31 are both positioned in the limiting holes, a safety block is fixedly connected on the outer wall of the limiting rod 34, a safety groove is arranged in the lower extending plate 30 and is slidably connected with the groove wall of the mounting groove, when the limiting device is taken, the upper extending plate 35 and the lower extending plate 30 can be respectively held, the moving block 6 can be conveniently taken out, then when the two moving blocks 6 move oppositely when being installed, the limiting rod 34 enters the limiting holes in the lower extending plate 30 under, the jacking rod 31 moves under the action of gravity, the upper extension plate 35 and the lower extension rod 30 are relatively fixed at the moment, two disconnection between the electric contact strips 17 are guaranteed, the door 16 is closed and opened after installation is completed, the jacking block 32 contacts the jacking rod 31, the jacking rod 31 moves upwards, the limiting rod 34 is jacked open, and under the action of the third spring, the two moving blocks 6 move relatively to realize contact of the electric contact strips 17.
One side of conduit 14 is provided with the siphunculus 8 with protective housing 1 fixed connection, a plurality of sixth springs of fixedly connected with in the siphunculus 8, and the other end fixedly connected with of sixth spring is located the arc that siphunculus 8, and intercommunicating pore 8 makes things convenient for external electric wire's injeciton.
The working principle is as follows: after the fuse is broken, the opening door 16 is opened, the upper extension plate 35 and the lower extension plate 30 are respectively held, the moving block 6 is taken out through the limiting plate 5 connected with the upper extension plate 35 and the lower extension plate 30, then the whole device is taken out, the porcelain rod 15 is fluctuated at the outer side of the protection box 1, the first connecting block 24 and the second connecting block 27 are moved under the driving of the porcelain rod 15 and the connecting rod 23, the connecting hole and the access hole 25 on the movement of the first connecting block 24 and the second connecting block 27 are mutually communicated, the fuse which is broken before is taken out, then the two ends of the fuse which is cut in the earlier stage are respectively led into the first connecting block 24 and the second connecting block 27 through the access hole 25, then the lifting rod 15 is loosened, the first connecting block 24 and the second connecting block 27 are moved downwards under the action of the first spring 20, the fuse is simultaneously tensioned, and then the two moving blocks 6 are pressed, the two moving blocks 6 move oppositely, namely the upper extension plate 35 and the lower extension rod 30 move oppositely, under the action of the fourth spring 33, the limiting rod 34 enters the limiting hole in the lower extension plate 30, the jacking rod 31 moves under the action of gravity, at this time, the upper extension plate 35 and the lower extension rod 30 are relatively fixed, the disconnection between the two contact strips 17 is ensured, when the moving block 6 is taken out, the second spring 13 pushes the adaptation block 12 by elasticity, so that the adaptation block 12 moves oppositely, a specified position is reached, at this time, the upper extension plate 35 and the lower extension rod 30 are held, then the moving block 6 is moved, one side of the moving block 6 is contacted with the contact block 28, at this time, the zero line and the live line are respectively contacted with the two moving blocks 6, the conduction is realized, at this time, the two contact strips 17 are not contacted yet, the whole circuit is still in an open circuit state, and after the installation, the whole open door 16 is closed, at the moment, the jacking block 32 contacts the limiting device, so that the state of the limiting device is changed, at the moment, the movable sleeve 10 and the connecting rod 9 generate relative motion through the elastic force of the third spring, and then the two movable blocks 6 jack the rod 31, so that the jacking rod 31 moves upwards, the jacking limiting rod 34 moves, under the action of the third spring, the two movable blocks 6 move relatively, the contact of the electric contact strip 17 is realized, the whole circuit forms a passage, when the current is higher than a certain fixed value again, the fuse wires on the two sides are respectively fused, and the safety coefficient is increased.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. The overvoltage and fuse preventing device for the coal mine is convenient to replace and comprises a protective box (1) and is characterized in that wire conduits (14) are fixed on two sides of the protective box (1), a placing plate (11) fixedly connected with the protective box (1) is arranged between the two wire conduits (14), moving blocks (6) arranged in parallel are connected on the placing plate (11) in a sliding mode, mounting devices are arranged on the two moving blocks (6), the mounting devices are connected with third conductive blocks (29) fixedly connected with the moving blocks (6) through wires, contact blocks (28) are sleeved in the third conductive blocks (29) in a sliding mode, an adapting block (12) fixedly connected with the protective box (1) in a sliding mode is fixedly connected to one side of each contact block (28), and a second spring (13) fixedly connected with the protective box (1) is fixedly connected to one side of each adapting block (12), one of them movable block (6) screw thread sleeve has adapter sleeve (10), fixedly connected with third spring in adapter sleeve (10), and the other end of third spring is connected with spliced pole (9) that cup joints with adapter sleeve (10) slip, the one end and another of spliced pole (9) movable block (6) screw thread sleeve, two equal fixedly connected with function pole (4) on movable block (6), one side fixedly connected with of function pole (4) touches electric strip (17) with the installation device electricity is connected, two equal fixedly connected with limiting plate (5) on movable block (6), be provided with limiting device on limiting plate (5), one side of guard box (1) is rotated and is connected with opening door (16), one side of opening door (16) is provided with the piece (32) of pushing up that contacts with limiting device.
2. The overvoltage and fuse preventing device convenient to replace for the coal mine according to claim 1, wherein the mounting device comprises a porcelain rod (15) in sliding sleeve connection with a moving block (6), both sides of the porcelain rod (15) are fixedly connected with first springs (20) fixedly connected with the moving block (6), the bottom end of the porcelain rod (15) is fixedly connected with a first connecting block (24), a first conductive block (22) fixedly connected with the moving block (6) is in sliding sleeve connection with the outer wall of the first connecting block (24), a connecting rod (23) in sliding sleeve connection with the moving block (6) is fixedly connected below the first connecting block (24), a second connecting block (27) is fixedly connected with the other end of the connecting rod (23), a second conductive block (26) fixedly connected with the moving block (6) is in sliding sleeve connection with the outer wall of the second connecting block (27), the second conductive block (26) is connected with a third conductive block (29) through a wire, and the first conductive block (22) is connected with the electric contact strip (17) through a wire.
3. The overvoltage-preventing fusing device convenient to replace for the coal mine according to claim 2, wherein connecting holes are formed in the first conducting block (22) and the second conducting block (26), and an inlet hole (25) communicated with the connecting holes is formed in the moving block (6).
4. The coal mine overvoltage-preventing fusing device convenient to replace according to claim 1, wherein the limiting device comprises an upper extending plate (35) and a lower extending plate (30) which are fixedly connected with two limiting plates (5) respectively, the upper side of the upper extending plate (35) is fixedly connected with a fourth spring (33), the upper end of the fourth spring (33) is fixedly connected with a limiting rod (34), the bottom end of the limiting rod (34) is connected with a jacking rod (31) which is slidably sleeved on the lower extending plate (30), and the jacking rod (31) is slidably connected with a jacking block (32).
5. The coal mine overvoltage-preventing fusing device convenient to replace according to claim 4, wherein limiting holes are formed in the upper extending plate (35) and the lower extending plate (30), one ends of the limiting rods (34) and one ends of the jacking rods (31) are located in the limiting holes, safety blocks are fixedly connected to the outer wall of each limiting rod (34), safety grooves are formed in the lower extending plate (30), and the safety blocks are connected with the groove walls of the mounting grooves in a sliding mode.
6. The overvoltage and fuse preventing device convenient to replace according to claim 1, wherein a fifth spring (2) is fixedly connected to the protection box (1), a maintaining and stabilizing block (3) in sliding sleeve connection with the protection box (1) is fixedly connected to the other end of the fifth spring (2), and a maintaining and stabilizing rod (7) in sliding sleeve connection with the moving block (6) is fixedly connected to the other end of the maintaining and stabilizing block (3).
7. The coal mine overvoltage and fusion preventing device convenient to replace according to claim 1, wherein a through pipe (8) fixedly connected with the protective box (1) is arranged on one side of the conduit (14), a plurality of sixth springs are fixedly connected in the through pipe (8), and an arc-shaped plate located in the through pipe (8) is fixedly connected to the other end of each sixth spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022797587.7U CN213340272U (en) | 2020-11-27 | 2020-11-27 | Coal mine overvoltage-preventing fusing device convenient to replace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022797587.7U CN213340272U (en) | 2020-11-27 | 2020-11-27 | Coal mine overvoltage-preventing fusing device convenient to replace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213340272U true CN213340272U (en) | 2021-06-01 |
Family
ID=76079539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022797587.7U Active CN213340272U (en) | 2020-11-27 | 2020-11-27 | Coal mine overvoltage-preventing fusing device convenient to replace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213340272U (en) |
-
2020
- 2020-11-27 CN CN202022797587.7U patent/CN213340272U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110034002B (en) | Fuse capable of automatically recovering | |
| CN110867707A (en) | Overload protection type socket | |
| CN218097841U (en) | Wireless detection terminal for extra-high voltage power cable wiring terminal | |
| CN211479975U (en) | Fuse base convenient for replacing parts | |
| CN210468386U (en) | Mining high-voltage vacuum power distribution device with grounding disconnecting link | |
| CN213340272U (en) | Coal mine overvoltage-preventing fusing device convenient to replace | |
| CN202855602U (en) | Switch current carrying mechanism | |
| CN204088239U (en) | Self-recoverage fuse | |
| CN113053701A (en) | Automatic recovery fuse | |
| CN201311901Y (en) | Novel jumper of high-voltage fuse wire | |
| CN205028878U (en) | No. two fuses | |
| CN216958756U (en) | Self-power-off safety socket for office work | |
| CN201199488Y (en) | Contact apparatus for starter | |
| CN205944021U (en) | Drop -out switching device that no fuse can repeatedly be operated | |
| CN208570511U (en) | It is capable of the fuse of quick-replaceable melt | |
| CN204189695U (en) | Isolating switch fuse group | |
| CN103326192A (en) | Safety socket | |
| CN220795761U (en) | Overload-proof safety connection equipment for computer | |
| CN211182139U (en) | Short-circuit protection device | |
| CN219592117U (en) | Surge protector convenient to change fuse | |
| CN112117592A (en) | Connection device for electron tube of electronic device | |
| CN209895996U (en) | Combinable circuit breaker shell | |
| CN212967498U (en) | Power switch blade with prevent function of striking sparks | |
| CN205177755U (en) | Arc control device on circuit breaker | |
| CN116544815B (en) | Overheat early warning safety protection distribution box |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231130 Address after: 719000 Shendong Community, Houliuta Village, Daliuta Town, Shenmu City, Yulin City, Shaanxi Province Patentee after: Shaanxi Quanzheng Mining Information Co.,Ltd. Address before: 550000 6 / F, unit 1, Yurong new town, 139 Xintian Avenue South, Yunyan District, Guiyang City, Guizhou Province Patentee before: Guizhou Dagong Electromechanical Equipment Co.,Ltd. |