CN111736095B - Short-circuit fault detection device - Google Patents
Short-circuit fault detection device Download PDFInfo
- Publication number
- CN111736095B CN111736095B CN202010727863.4A CN202010727863A CN111736095B CN 111736095 B CN111736095 B CN 111736095B CN 202010727863 A CN202010727863 A CN 202010727863A CN 111736095 B CN111736095 B CN 111736095B
- Authority
- CN
- China
- Prior art keywords
- side wall
- metal sheet
- box body
- indicating
- sheet
- 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
- 238000001514 detection method Methods 0.000 title claims abstract description 45
- 229910052751 metal Inorganic materials 0.000 claims abstract description 122
- 239000002184 metal Substances 0.000 claims abstract description 122
- 239000007788 liquid Substances 0.000 claims description 42
- 239000004020 conductor Substances 0.000 claims description 9
- 238000009434 installation Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 5
- 230000005489 elastic deformation Effects 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 3
- 239000012212 insulator Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Connection Or Junction Boxes (AREA)
Abstract
The invention discloses a short-circuit fault detection device which comprises an insulating box body and an indicating component, wherein a cavity body respectively comprises a first side wall, a second side wall, a third side wall and a fourth side wall, the third side wall and the fourth side wall are respectively positioned between the first side wall and the second side wall, a first metal sheet and a second metal sheet are respectively arranged in the cavity body and are distributed at intervals along a second direction, two ends of the first metal sheet and two ends of the second metal sheet are respectively and fixedly connected with the first side wall and the second side wall, and the second metal sheet is an elastic sheet. The indicating component comprises an indicating box body, an indicating cover and a first elastic component, the indicating box body is arranged on the fourth side wall, the indicating cover is detachably connected with the indicating box body through a buckle assembly, one end of the first elastic component is connected with the non-end portion of the second metal sheet, and the other end of the first elastic component penetrates through the indicating box body and then is connected with the indicating cover. The staff can be directly through observing whether the instruction lid is pushed away from the instruction box body, can judge the circuit that power electronic transformer broke down rapidly, convenient detection.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to a short-circuit fault detection device.
Background
The power electronic transformer generally has a protection circuit inside, and when the inside and the outside of the power electronic transformer are short-circuited, the protection circuit can act rapidly to avoid burning out the power electronic transformer. However, the operator cannot know the specific line where the short circuit occurs because of the rapid operation.
The short-circuit fault detection device is used for detecting a short-circuit line of a power electronic transformer in the market, but the short-circuit fault detection device in the prior art is single in structure and cannot meet the use requirements of users.
Disclosure of Invention
The invention aims to: a short-circuit fault detection device is provided to solve the defects in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the short-circuit fault detection device comprises an insulation box body and an indication component;
the insulating box body is internally provided with a cavity, the cavity respectively comprises a first side wall, a second side wall, a third side wall and a fourth side wall which are respectively positioned between the first side wall and the second side wall, the first side wall and the second side wall are arranged at intervals and oppositely in a first direction, the third side wall and the fourth side wall are arranged at intervals and oppositely in a second direction, the cavity is internally provided with first metal sheets which are distributed at intervals along the second direction and second metal sheets which are electrically connected with the first metal sheets through electric conductors, both ends of the first metal sheet and both ends of the second metal sheet are respectively fixedly connected with the first side wall and the second side wall, the first metal sheet is adjacent to the third side wall, the second metal sheet is adjacent to the fourth side wall, the second metal sheet is an elastic sheet, and the first metal sheet and the second metal sheet are respectively connected with the access lead and the output lead;
the indicating component comprises an indicating box body, an indicating cover and a first elastic component, the indicating box body is arranged on the fourth side wall, the indicating cover is arranged on one side of the cavity back to back, the indicating cover is detachably connected with the indicating box body through a buckle assembly, one end of the first elastic component is connected with the non-end portion of the second metal sheet, and the other end of the first elastic component penetrates through the indicating box body and then is connected with the indicating cover.
As a preferable technical solution of the short-circuit fault detection device, the first side wall and the second side wall are both provided with vent holes communicated with the cavity, and the vent holes are respectively provided between the first metal sheet and the second metal sheet and between the second metal sheet and the fourth side wall.
As a preferred technical solution of the short-circuit fault detection device, two first limit bumps and two second limit bumps are fixedly connected to the first side wall and the second side wall respectively, the first limit bumps and the second limit bumps are located in the cavity, one of the first limit bumps and one of the second limit bumps are close to a side surface of the first metal sheet departing from the fourth side wall, the other of the first limit bumps and the other of the second limit bumps are close to a side surface of the second metal sheet departing from the third side wall, the first metal sheet includes a first connection sheet and first fixing portions respectively disposed at two ends of the first connection sheet, the two first fixing portions are respectively fixedly connected to the first side wall and the second side wall, the first connection sheet is respectively fixedly connected to the first limit bumps and the second limit bumps corresponding thereto, the second metal sheet comprises a second connecting sheet and second fixing parts respectively arranged at two ends of the second connecting sheet, and the second connecting sheet is respectively and fixedly connected with the first limiting lug and the second limiting lug corresponding to the second connecting sheet.
As a preferable technical solution of the short-circuit fault detection device, the first connection piece is of a straight structure, and the second connection piece is of a wave structure.
As a preferred technical scheme of short-circuit fault detection device, the mounting hole has been seted up in the fourth lateral wall through, it installs to instruct the box body in the mounting hole, just instruct the lateral wall of box body with the lateral wall of mounting hole is connected, instruct the box body for the one end of instructing the lid is seted up and is used for dodging the hole, it is used for dodging to dodge the hole first elastomeric element
As a short-circuit fault detection device's an preferred technical scheme, first elastomeric element is first pressure spring, the one end of first pressure spring with the second sheetmetal deviates from a side of first sheetmetal is connected, and the other end passes dodge the hole and with the direction lid orientation a side of cavity is connected.
As an optimal technical scheme of the short-circuit fault detection device, the buckle assembly comprises a buckle protrusion and a buckle groove in matched and clamped connection with the buckle protrusion, the buckle protrusion is located on the side wall of the indication box body, and the buckle groove is located on the indication cover.
As a preferable technical solution of the short-circuit fault detection device, a second elastic member is disposed between the second metal sheet and the fourth side wall, one end of the second elastic member is connected with an adjusting bolt, the fourth side wall is provided with an adjusting threaded hole in a penetrating manner, the adjusting bolt is screwed in the adjusting threaded hole, and one end of the second elastic member, which is far away from the adjusting bolt, is connected with the second metal sheet.
As an optimal technical scheme of the short-circuit fault detection device, the access lead and the access lead are both provided with wiring terminals, and the wiring terminals are puncture-free wiring terminals.
As a preferred technical solution of the short-circuit fault detection device, a liquid box is disposed inside the indication box body, the liquid box contains indication liquid, a puncture needle corresponding to the liquid box is disposed on one side of the second connection sheet, which is away from the first connection sheet, a needle head of the puncture needle penetrates through the indication box body and extends into the indication box body, a gap is formed between the puncture needle and the liquid box, when the second metal sheet is pushed to deform, the second metal sheet drives the puncture needle to move towards the liquid box and puncture the liquid box, and the indication box is provided with a leakage hole for indicating leakage of liquid.
The invention has the beneficial effects that: the two ends of the first metal sheet and the second metal sheet are respectively fixedly connected with the first side wall and the second side wall, the second metal sheet is pushed towards the direction of the indication box body under the pushing of the repulsive force, and the non-end part of the second metal sheet is pushed to protrude towards the direction of the indication box body due to the fact that the second metal sheet is an elastic metal sheet. The non-tip of second sheetmetal compresses first elastic component after being promoted, and first elastic component produces the pushing force to instructing the lid after being compressed, and then will instruct the lid to push away from instructing the box body. When the fault line is recovered to be normal, the currents on the first metal sheet and the second metal sheet are reduced, so that the repulsive force between the first metal sheet and the second metal sheet is reduced, and the second metal sheet automatically recovers elastic deformation at the moment. This short-circuit fault detection device, the heavy current that produces when the short circuit takes place in the circuit and produce huge repulsion force on first sheetmetal and second sheetmetal, promote the second sheetmetal and take place elastic deformation to will instruct the lid to push away from instructing the box body, be different from the structure among the prior art, staff can directly instruct the lid through the observation whether to be pushed away from instructing the box body, can judge the circuit that power electronic transformer broke down rapidly, convenient detection.
Drawings
The invention is explained in more detail below with reference to the figures and examples.
Fig. 1 is a sectional view of a short-circuit fault detection apparatus according to an embodiment.
Fig. 2 is a sectional view of a short fault detection apparatus according to another embodiment.
Fig. 3 is a schematic structural diagram of an indication box according to an embodiment.
In the figure:
1. an insulating box body; 101. a first side wall; 102. a second side wall; 103. a third side wall; 104. a fourth side wall; 2. a first metal sheet; 201. a first connecting piece; 202. a first fixed part; 3. a second metal sheet; 301. a second connecting sheet; 302. a second fixed part; 4. a cavity; 5. a first limit bump; 6. a second limit bump; 7. an indicating cover; 701. a cover body; 702. a connecting portion; 8. the buckle is protruded; 9. indicating the box body; 10. a first elastic member; 11. a second elastic member; 12. adjusting the bolt; 13. a vent hole; 14. connecting a lead; 15. connecting out a lead; 16. a puncture-free wiring terminal; 17. an external thread; 18. an electrical conductor; 19. puncturing the needle; 20. a liquid cartridge.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
As shown in fig. 1 to 3, the present invention provides a short-circuit fault detection device, which is applied to short-circuit detection of a power electronic transformer, and comprises an insulation box 1 and an indication component. The insulating box 1 has a cavity 4 therein, and the cavity 4 is respectively a first sidewall 101, a second sidewall 102, a third sidewall 103, a fourth sidewall 104, a fifth sidewall (not shown in the figure), and a sixth sidewall (not shown in the figure). The first sidewall 101 and the second sidewall 102 are spaced and oppositely disposed in a first direction, the third sidewall 103 and the fourth sidewall 104 are spaced and oppositely disposed in a second direction, and the fifth sidewall and the sixth sidewall are spaced and oppositely disposed in a third direction. The first side wall 101 is parallel to the second side wall 102, the third side wall 103 is parallel to the fourth side wall 104, the fifth side wall is parallel to the sixth side wall, and the first side wall 101, the second side wall 102, the third side wall 103, the fourth side wall 104, the fifth side wall and the sixth side wall respectively enclose the insulating box body 1 which is in a cuboid structure. The cavity 4 is internally provided with a first metal sheet 2 and a second metal sheet 3 which are respectively distributed along the second direction at intervals, the first metal sheet 2 is electrically conducted with the second metal sheet 3 through an electric conductor 18, two ends of the first metal sheet 2 and two ends of the second metal sheet 3 are respectively fixedly connected with the first side wall 101 and the second side wall 102, the first metal sheet 2 is close to the third side wall 103, the second metal sheet 3 is close to the fourth side wall 104, the second metal sheet 3 is an elastic sheet, and the first metal sheet 2 and the second metal sheet 3 are respectively connected with an access lead 14 and an output lead 15.
The indicating component comprises an indicating box body 9, an indicating cover 7 and a first elastic component 10, the indicating box body 9 is arranged on the fourth side wall 104, the indicating cover 7 is arranged on one side, back to the cavity 4, of the indicating box body 9, and the indicating cover 7 is detachably connected with the indicating box body 9 through a buckle assembly. One end of the first elastic component 10 is connected with the non-end part of the second metal sheet 3, and the other end of the first elastic component passes through the indication box body 9 and then is connected with the indication cover 7.
Referring to fig. 1, in this specification, the first direction refers to a Z direction, the second direction refers to an X direction, and the third direction refers to a Y direction.
In a specific use, the output bus is connected to the short-circuit failure detection device through the connecting lead 14, current flows from the first metal sheet 2 to the second metal sheet 3 through the conductor 18 and flows out through the connecting lead 15, the current direction of the first metal sheet 2 is opposite to that of the second metal sheet 3, and as can be seen from the principle of electrodynamic force, when the currents of the two conductors are in the same direction, an attractive force is generated between the two conductors, and when the currents of the two conductors are in the opposite direction, a repulsive force is generated between the two conductors.
When a short circuit occurs in the line, a large short circuit current suddenly appears on the first metal sheet 2 and the second metal sheet 3, and a large repulsive force is generated between the first metal sheet 2 and the second metal sheet 3. Both ends of the first metal sheet 2 and the second metal sheet 3 are respectively fixedly connected with the first side wall 101 and the second side wall 102, the second metal sheet 3 is pushed towards the direction of the indication box 9 under the pushing of the repulsive force, and the non-end part of the second metal sheet 3 is pushed to protrude towards the direction of the indication box 9 because the second metal sheet 3 is an elastic metal sheet. The non-end of the second metal sheet 3 is pushed to compress the first elastic component 10, and the first elastic component 10 is compressed to generate pushing force on the indicating cover 7, so that the indicating cover 7 is pushed away from the indicating box body 9. When the fault line is recovered to be normal, the currents on the first metal sheet 2 and the second metal sheet 3 are reduced, so that the repulsive force between the first metal sheet 2 and the second metal sheet 3 is reduced, and at the moment, the second metal sheet 3 automatically recovers elastic deformation. This short-circuit fault detection device, the heavy current that produces when the short circuit takes place in the circuit and produce huge repulsion force on first sheetmetal 2 and second sheetmetal 3, promote second sheetmetal 3 and take place elastic deformation to promote to instruct lid 7 and push away from instructing box body 9, be different from the structure among the prior art, the staff can directly instruct lid 7 through observing whether pushed away from instructing box body 9, can judge the circuit that power electronic transformer broke down rapidly, convenient detection.
In order to avoid that the fifth and sixth side walls obstruct the non-end portion of the second metal sheet 3 from being pushed to deform, in the present embodiment, said second metal sheet 3 is spaced from said fifth and sixth side walls, respectively.
In a preferred embodiment, the first sidewall 101 and the second sidewall 102 are both opened with vent holes 13 communicating with the cavity 4, and the vent holes 13 are respectively disposed between the first metal sheet 2 and the second metal sheet 3 and between the second metal sheet 3 and the fourth sidewall 104. The vent hole 13 is arranged to communicate the inside and the outside of the insulating box 1, keep the air pressure inside the cavity 4 the same as the external atmospheric pressure, and prevent the air pressure inside the cavity 4 from influencing the recovery of the second metal sheet 3 after the non-end part of the second metal sheet 3 is pushed by the repulsive force to deform.
In an embodiment, two first limiting protrusions 5 and two second limiting protrusions 6 are fixedly connected to the first side wall 101 and the second side wall 102, respectively, the first limiting protrusions 5 and the second limiting protrusions 6 are located in the cavity 4, one of the first limiting protrusions 5 and one of the second limiting protrusions 6 are close to a side surface of the first metal sheet 2 departing from the fourth side wall 104, and the other one of the first limiting protrusions 5 and the other one of the second limiting protrusions 6 are close to a side surface of the second metal sheet 3 departing from the third side wall 103. The first metal sheet 2 comprises a first connecting sheet 201 and first fixing portions 202 respectively arranged at two ends of the first connecting sheet 201, the two first fixing portions 202 are respectively fixedly connected with the first side wall 101 and the second side wall 102, and the first connecting sheet 201 is respectively fixedly connected with the corresponding first limiting bump 5 and the second limiting bump 6. The second metal sheet 3 comprises a second connecting sheet 301 and second fixing portions 302 respectively arranged at two ends of the second connecting sheet 301, and the second connecting sheet 301 is respectively fixedly connected with the corresponding first limiting lug 5 and the second limiting lug 6. In this embodiment, the connecting sheet, the limiting protrusion and the two fixing portions are respectively connected to the first side wall 101 and the second side wall 102, so as to ensure that the same metal sheet has at least three fixing connection points, which can effectively improve the connection strength between the metal sheet and the insulating box 1, and prevent the metal sheet from separating from the side wall of the insulating box 1 under the pushing of the repulsive force. In addition, since the first limiting bump 5 and the second limiting bump 6 are both fixedly connected with the side wall of the first connecting piece 201 and the second connecting piece 301 which are away from each other, the first connecting piece 201 and the second connecting piece 301 respectively have a tendency to move towards the third side wall 103 and the fourth side wall 104 under the pushing of the first connecting piece 201 and the second connecting piece 301 by the repulsive force, and at this time, a certain resisting force can be applied to the first connecting piece 201 and the second connecting piece 301 through the first limiting bump 5 and the second limiting bump 6, so that the possibility that the first metal sheet 2 and the second metal sheet 3 are separated from the first side wall 101 and the second side wall 102 is reduced.
Specifically, the first limit bump 5 and the second limit bump 6 are both insulators.
In this embodiment, the first connecting piece 201 has a straight structure, and the second connecting piece 301 has a wavy structure. The second connecting sheet 301 with the wavy structure has high sensitivity, and under the condition that the first connecting sheet 201 and the second connecting sheet 301 are subjected to small repulsive force, the second connecting sheet 301 can be deformed obviously, and the shape of the first connecting sheet 201 is kept unchanged as much as possible.
In another embodiment, the first connecting piece 201 and the second connecting piece 301 are both straight sheet-like structures, and the second connecting piece 301 of such a structure is easily elastically deformed when receiving a repulsive force, so that the detection sensitivity is high.
In an embodiment, a mounting hole is formed through the fourth side wall 104, the indication box body 9 is mounted in the mounting hole, the side wall of the indication box body 9 is connected with the side wall of the mounting hole, and an avoiding hole is formed at one end of the indication box body 9 opposite to the indication cover 7 and used for avoiding the first elastic component 10. Wherein, the indication box body 9 and the indication cover 7 are insulators. Specifically, first elastic component 10 is first pressure spring, the one end of first pressure spring with second sheetmetal 3 deviates from a side of first sheetmetal 2 is connected, and the other end passes dodge the hole and with indicate lid 7 orientation a side of cavity 4 is connected.
In this embodiment, the indication box 9 is a cylinder structure with two open ends, one open end of the cylinder structure is the avoiding hole, and the other open end is provided with the indication cover 7.
Specifically, buckle subassembly include buckle arch 8 and with the buckle recess of 8 cooperation joints of buckle, buckle arch 8 is located instruct on the lateral wall of box body 9, the buckle recess is located instruct on the lid 7, realize instructing lid 7 and instruct the dismantlement of box body 9 to be connected.
The indicating cover 7 includes a cover body 701 and a connecting portion 702 annularly disposed on the periphery of the cover body 701, one end of the first elastic member 10 away from the second metal sheet 3 is connected to the cover body 701, and the snap protrusion 8 is disposed on the connecting portion 702.
In order to facilitate installation of the indication box body 9, the installation hole is a threaded hole, the side wall of the indication box body 9 is provided with an external thread 17 screwed in a matched mode with the thread of the installation hole, the indication box body 9 can be directly screwed into the installation hole during actual installation, the indication box body 9 can be installed on the insulation box body 1 without any tool, and installation difficulty is effectively reduced.
In order to adjust the sensitivity of the short-circuit fault detection device, a second elastic component 11 is arranged between the second metal sheet 3 and the fourth side wall 104, an adjusting bolt 12 is connected to one end of the second elastic component 11, an adjusting threaded hole is formed in the fourth side wall 104 in a penetrating mode, the adjusting bolt 12 is screwed in the adjusting threaded hole, and one end, far away from the adjusting bolt 12, of the second elastic component 11 is connected with the second metal sheet 3. By changing the depth to which the adjustment bolt 12 is screwed into the adjustment threaded hole, the length by which the second elastic member 11 is compressed can be adjusted. Because first elastic component 10 and second elastic component 11 are all connected with second sheetmetal 3, when adjusting bolt 12 screwed into adjusting threaded hole degree of depth is dark (namely second elastic component 11 is compressed to shorter length), can push away from instruction box body 9 with instruction lid 7 after second sheetmetal 3 is promoted to take place great deformation, when adjusting bolt 12 screwed into adjusting threaded hole degree of depth is shallow (namely second elastic component 11 is compressed to longer length), second sheetmetal 3 is promoted to take place less deformation and can push away from instruction box body 9 with instruction lid 7.
For the convenience with short-circuit fault detection device, access wire 14 with connect out wire 15 and all be provided with binding post, binding post is for exempting from puncture-type binding post 16. The wiring terminal is arranged to be a puncture-free wiring terminal 16, so that the access lead 14 and the output lead 15 are conveniently connected with an output bus on the power electronic transformer. Of course, in other embodiments, the connection terminal is not limited to the puncture-free connection terminal 16, and any connection terminal may be used to electrically connect the incoming wire 14 or the outgoing wire 15 with the output bus.
In practical design, the incoming lead 14 and the outgoing lead 15 are led out from the third side wall 103 and the fourth side wall 104 of the insulation box 1 to the outside of the insulation box 1 respectively. By adopting the design, the connecting terminals on the incoming lead 14 and the outgoing lead 15 are led out from different side walls of the insulating box body 1, so that the connecting terminals on the incoming lead 14 and the connecting terminals on the outgoing lead 15 are far away as possible, and when the short-circuit fault detection device is connected to the output bus in parallel, the phenomenon that the two connecting terminals repel each other due to the existence of electric power can be effectively prevented.
In other embodiments, the short-circuit fault detection device can also be connected in series to the output bus.
In one embodiment, a liquid box 20 is disposed inside the indication box body 9, the liquid box 20 contains indication liquid, a puncture needle 19 corresponding to the liquid box 20 is disposed on a side of the second connection sheet 301 away from the first connection sheet 201, a needle head of the puncture needle 19 penetrates through the indication box body 9 and extends into the indication box body 9, a gap is formed between the puncture needle 19 and the liquid box 20, when the second metal sheet 3 is pushed to deform, the second metal sheet 3 drives the puncture needle 19 to move towards the liquid box 20 and puncture the liquid box 20, and the indication box body 9 is provided with a leakage hole for indicating leakage of the liquid. When a short circuit occurs to a circuit, a large short circuit current suddenly appears on the first metal sheet 2 and the second metal sheet 3, a large repulsive force is generated between the first metal sheet 2 and the second metal sheet 3 at the moment, the second connecting sheet 301 is pushed by the repulsive force to protrude towards the direction of the indication box body 9, the puncture needle 19 is driven to move towards the direction of the indication box body 9 at the moment, the puncture needle 19 punctures the inside of the liquid box 20 after moving for a certain distance, so that the indication liquid flows out of the inside of the liquid box 20, due to the existence of the leakage hole, the indication liquid can flow out of the leakage hole to the outside of the indication box body 9, and a user can observe whether the short circuit occurs to the circuit from the outside of the indication box body 9. The liquid box 20 may be made of aluminum foil or tin foil, which is convenient for the puncture needle 19 to puncture. The arrangement of the liquid box 20 and the puncture needle 19 provides guarantee for the reliability of the short-circuit fault detection device, the flexibility of the use of the short-circuit fault detection device is further enhanced, and a worker can observe whether the indication cover 7 is pushed away from the indication box body 9 to judge whether the circuit is short-circuited or not and can also judge whether the circuit is short-circuited or not by observing whether the indication liquid seeps out from the outside of the indication box body 9. In addition, when the indication cover 7 is accidentally clamped on the indication box body 9, the short-circuit fault detection device can still be normally used, and the reliability is guaranteed.
Specifically, the indicating liquid is colored liquid, which is convenient for a user to observe.
Preferably, a sponge layer is wrapped on the periphery of the indication box body 9, and the sponge layer covers the leakage hole. After the liquid box 20 is punctured, the indicating liquid flows out of the indicating box body 9 from the leakage hole and is absorbed by the sponge layer, so that the sponge layer is dyed with the color of the indicating liquid. The sponge layer can effectively prevent the indicating liquid drops from falling on the ground. In order to facilitate the observation of the color of the indicating liquid on the sponge layer, the sponge layer is made of light sponge, for example, white sponge in this embodiment.
In a preferred embodiment, the liquid cartridge 20 is detachably connected to the inner sidewall of the indication case 9, for example, by a screw, or by a screw, and the like, so that the short-circuit failure detection apparatus can be reused by replacing the liquid cartridge 20 after the liquid cartridge 20 is punctured.
In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are based on the orientation or positional relationship shown in the drawings for convenience in description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (9)
1. A short-circuit fault detection device is characterized by comprising an insulating box body and an indicating component;
the insulating box body is internally provided with a cavity, the cavity comprises a first side wall, a second side wall, a third side wall and a fourth side wall which are respectively positioned between the first side wall and the second side wall, the first side wall and the second side wall are arranged at intervals and oppositely in a first direction, the third side wall and the fourth side wall are arranged at intervals and oppositely in a second direction, the cavity is internally provided with first metal sheets which are distributed at intervals along the second direction and second metal sheets which are electrically connected with the first metal sheets through electric conductors, both ends of the first metal sheet and both ends of the second metal sheet are respectively fixedly connected with the first side wall and the second side wall, the first metal sheet is adjacent to the third side wall, the second metal sheet is adjacent to the fourth side wall, the second metal sheet is an elastic sheet, and the first metal sheet and the second metal sheet are respectively connected with the access lead and the output lead;
the indicating component comprises an indicating box body, an indicating cover and a first elastic component, the indicating box body is arranged on the fourth side wall, the indicating cover is arranged on one side of the indicating box body back to the cavity body, the indicating cover is detachably connected with the indicating box body through a buckle assembly, one end of the first elastic component is connected with the non-end part of the second metal sheet, the other end of the first elastic component penetrates through the indicating box body and then is connected with the indicating cover, a liquid box is arranged in the indicating box body, indicating liquid is contained in the liquid box, a puncture needle corresponding to the liquid box is arranged on one side of the second connecting sheet, which is far away from the first connecting sheet, the needle head of the puncture needle penetrates through the indicating box body and extends into the indicating box body, a gap is formed between the puncture needle and the liquid box, when the second metal sheet is pushed to deform, the second metal sheet drives the puncture needle to move towards the direction of the liquid box and puncture the liquid box, and the indication box body is provided with a leakage hole for indicating leakage of liquid.
2. The short-circuit fault detection device according to claim 1, wherein the first side wall and the second side wall are both provided with vent holes communicating with the cavity, and the vent holes are respectively provided between the first metal sheet and the second metal sheet and between the second metal sheet and the fourth side wall.
3. The short-circuit fault detection device according to claim 1, wherein two first limit bumps and two second limit bumps are fixedly connected to the first side wall and the second side wall respectively, the first limit bumps and the second limit bumps are located in the cavity, one of the first limit bumps and one of the second limit bumps are close to a side surface of the first metal sheet facing away from the fourth side wall, the other of the first limit bumps and the other of the second limit bumps are close to a side surface of the second metal sheet facing away from the third side wall, the first metal sheet includes a first connection sheet and first fixing portions respectively disposed at two ends of the first connection sheet, the two first fixing portions are fixedly connected to the first side wall and the second side wall respectively, and the first connection sheet is fixedly connected to the corresponding first limit bumps and the corresponding second limit bumps respectively, the second metal sheet comprises a second connecting sheet and second fixing parts respectively arranged at two ends of the second connecting sheet, and the second connecting sheet is respectively and fixedly connected with the first limiting lug and the second limiting lug corresponding to the second connecting sheet.
4. The short-circuit fault detection device of claim 3, wherein the first connection tab is of a straight configuration and the second connection tab is of a wavy configuration.
5. The short-circuit fault detection device according to claim 1, wherein a mounting hole is formed through the fourth side wall, the indication box body is mounted in the mounting hole, the side wall of the indication box body is connected with the side wall of the mounting hole, an avoidance hole is formed at one end of the indication box body opposite to the indication cover, and the avoidance hole is used for avoiding the first elastic component.
6. The short-circuit fault detection device according to claim 5, wherein the first elastic member is a first pressure spring, one end of the first pressure spring is connected to a side surface of the second metal sheet away from the first metal sheet, and the other end of the first pressure spring passes through the avoiding hole and is connected to a side surface of the indicating cover facing the cavity.
7. The short-circuit fault detection device according to claim 1, wherein the snap assembly comprises a snap protrusion and a snap groove cooperatively clamped with the snap protrusion, the snap protrusion is located on a side wall of the indication box body, and the snap groove is located on the indication cover.
8. The short-circuit failure detection device according to claim 1, wherein a second elastic member is provided between the second metal piece and the fourth side wall, an adjustment bolt is connected to one end of the second elastic member, an adjustment threaded hole is provided through the fourth side wall, the adjustment bolt is screwed into the adjustment threaded hole, and one end of the second elastic member, which is away from the adjustment bolt, is connected to the second metal piece.
9. The short-circuit fault detection device according to claim 5, wherein the incoming lead and the outgoing lead are provided with connection terminals, and the connection terminals are puncture-free connection terminals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010727863.4A CN111736095B (en) | 2020-07-23 | 2020-07-23 | Short-circuit fault detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010727863.4A CN111736095B (en) | 2020-07-23 | 2020-07-23 | Short-circuit fault detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111736095A CN111736095A (en) | 2020-10-02 |
| CN111736095B true CN111736095B (en) | 2021-11-02 |
Family
ID=72657760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010727863.4A Active CN111736095B (en) | 2020-07-23 | 2020-07-23 | Short-circuit fault detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111736095B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202839973U (en) * | 2012-09-28 | 2013-03-27 | 永固集团股份有限公司 | Intelligent temperature sensing electric power connection wire clamp |
| CN103065885B (en) * | 2013-01-24 | 2015-06-03 | 浙江天正电气股份有限公司 | Novel earth leakage circuit breaker |
| CN109085452B (en) * | 2018-09-17 | 2021-07-06 | 广东电网有限责任公司 | Short-circuit fault detection device |
| CN208921811U (en) * | 2018-09-17 | 2019-05-31 | 广东电网有限责任公司 | Short-circuit fault detection device |
| CN108896786B (en) * | 2018-09-20 | 2023-08-01 | 广东电网有限责任公司 | Fault warning device and fault warning system |
| CN208653672U (en) * | 2018-09-27 | 2019-03-26 | 浙江科易电气有限公司 | Transformer special C-shaped thermometric wire clamp |
-
2020
- 2020-07-23 CN CN202010727863.4A patent/CN111736095B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111736095A (en) | 2020-10-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9380721B2 (en) | Cable clip for module electronics | |
| US4698725A (en) | Pressure sensitive interrupters for capacitors | |
| CN209896150U (en) | High-voltage protection structure of combined battery pack | |
| US20240274928A1 (en) | End cover assembly, energy storage apparatus, and electricity-consumption device | |
| EP2302718A1 (en) | Secondary battery | |
| CN111736095B (en) | Short-circuit fault detection device | |
| CN210136291U (en) | Block terminal electric leakage detection device | |
| CN220419480U (en) | Operation and maintenance fault diagnosis device for power system | |
| CN111796127A (en) | Connecting device for collecting single voltage of fuel cell | |
| CN218069748U (en) | Circuit breaker | |
| CN210669113U (en) | High-voltage switch cabinet | |
| CN211906502U (en) | Remote controller and electronic product with same | |
| CN216085072U (en) | Battery top cover, battery and device using battery | |
| CN218826905U (en) | High-reliability breaker type low-voltage switch cabinet | |
| CN220796994U (en) | Battery interface structure for photographic equipment and battery | |
| CN215527666U (en) | Leakage protector | |
| CN217641854U (en) | Wiring terminal and wiring structure | |
| CN214477617U (en) | Battery overcharge break gas production pressure testing device | |
| CN218940265U (en) | Wire harness switching device | |
| CN219959068U (en) | Battery cell and power battery | |
| EP4016023A1 (en) | Power storage module | |
| CN220711120U (en) | Contact-reliable surge protector and electronic equipment | |
| CN216699102U (en) | Electric shock protection device for electrical equipment shell based on electric field detection | |
| CN213936881U (en) | PT cabinet with pressure release function | |
| CN113692140B (en) | Connecting mechanism and connecting method of resonator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |