Portable small-current grounding line selection device

Abstract

The utility model provides a portable small current grounding line selection device comprising a housing, the left side and the right side of the inner wall of the housing are respectively provided with a plurality of heat dissipation holes, the left side and the right side of the housing are respectively and movably provided with a concentric-square-shaped frame, and the inner wall of each concentric-square-shaped frame is fixedly provided with a filter screen. The left side and the right side of the shell are each provided with two limiting assemblies, and each limiting assembly comprises an L-shaped limiting block, a circular rod, a limiting stop block, a circular hole and a torsional spring. Through arrangement of the temperature sensor, the controller, the heat dissipation fan, heat dissipation holes and a filter screen, the interior of the shell can be conveniently and automatically cooled; meanwhile, dust in the air is filtered under the arrangement of a filter screen, the filter screen can be conveniently taken down to be cleaned through the arrangement of a concentric-square-shaped frame, an L-shaped limiting block, a round rod and a torsional spring, and the situation that the heat dissipation effect in the shell is affected due to the fact that the filter screen is blocked by the dust is effectively avoided.

Description

Technical Field

[0001] The utility model relates to a small current grounding line selection device, in particular to a convenient small current grounding line selection device, belonging to the technical field of electric power equipment. Background Art

[0002] The small current grounding line selection device is a protection device for power systems. It is mainly used to detect and locate grounding faults in the system. Grounding faults may cause damage to equipment in the power system, affect the stable operation of the power system, and may even cause safety accidents such as fires. The small current grounding line selection device is suitable for distribution network systems with voltage levels of 66kV and below, where the neutral point is not grounded or grounded through resistors or arc suppression coils. It can be widely used in power supply systems of substations, power plants, hydropower stations, and large factories and mines such as petroleum, chemical, and metallurgy. It can accurately detect and isolate lines with single-phase grounding faults in the system, and can cooperate with the matching small current intelligent insulation monitoring system to monitor and warn the insulation status of the line;

[0003] A Chinese patent publication (publication number: CN208459531U) discloses a low-current grounding line selection device, including a device body and a limiting mechanism inside the device body and a repair mechanism at the rear end of the device body, wherein the limiting mechanism includes an operation panel, and limiting columns are fixed at the four corners of the rear end surface of the operation panel, and a main housing is arranged on the outside of the operation panel, and connecting columns are fixed at the four corners of the inner side of the main housing, and connecting holes are arranged on the inner side of the connecting columns; the connecting holes and limiting columns designed in the utility model can directly fix the two during installation, avoiding the phenomenon of connection misalignment caused by the difficulty in aligning the fixing holes during fixation, effectively ensuring the stability of the connection, and improving the work efficiency, and the designed rear protective plate can be directly opened through the clamping column when a fault occurs inside the low-current grounding line selection device, without the need to remove the screws one by one, which greatly simplifies the operation and makes the repair very convenient and quick;

[0004] The grounding line selection device does not need to be disassembled by removing screws to remove the rear protective plate, which improves the convenience and speed of maintenance. However, the heat dissipation method through the provided heat dissipation holes makes it easy for external dust to enter the interior of the device through the heat dissipation holes, affecting the normal operation of internal components. Therefore, a convenient small current grounding line selection device is proposed. Utility Model Content

[0005] In view of this, the utility model provides a convenient small current grounding line selection device to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial choice.

[0006] The technical solution of the utility model is achieved as follows: a portable small current grounding line selection device includes a shell, a plurality of heat dissipation holes are opened on the left side and the right side of the inner wall of the shell, a circular frame is movably provided on the left and right sides of the shell, a filter is fixedly installed on the inner wall of the circular frame, two limit assemblies are provided on the left and right sides of the shell, and the limit assemblies include an L-shaped limit block, a round rod, a limit stopper, a round hole and a torsion spring.

[0007] Further preferably, the sides of the two filters that are close to each other are in active contact with the left side and the right side of the shell respectively.

[0008] Further preferably, two circular rods are fixedly installed on the left and right sides of the shell, and a limit stop block is fixedly installed on one end of the circular rod away from the shell, a circular hole is opened on one side of the L-shaped limit block, and the L-shaped limit block is movably sleeved on the outer side of the circular rod. A torsion spring is wound around the outer side of the circular rod, one end of the torsion spring is fixedly connected to the outer side of the circular rod, and the other end of the torsion spring is fixedly connected to the inner wall of the circular hole.

[0009] Further preferably, a heat dissipation fan is fixedly mounted on the left side of the inner wall of the shell, a controller is fixedly mounted on the top of the inner wall of the shell, and a temperature sensor is fixedly mounted on the right side of the inner wall of the shell.

[0010] Further preferably, the electrical output end of the temperature sensor is electrically connected to the electrical input end of the controller, and the electrical output end of the controller is electrically connected to the electrical input end of the heat dissipation fan.

[0011] Further preferably, a U-shaped frame is fixedly installed on the left and right sides of the shell, and rectangular baffles are fixedly installed on the sides of the two U-shaped frames that are away from each other, and the sides of the two rectangular baffles that are close to each other are respectively in movable contact with the sides of the two circular frames that are away from each other, and the inner wall of the U-shaped frame is in movable contact with the outer side of the circular frame.

[0012] Further preferably, the inner wall of the L-shaped limiting block is in movably contact with the outer side of the circular frame.

[0013] The embodiment of the utility model has the following advantages due to the adoption of the above technical solution:

[0014] 1. The utility model is provided with a temperature sensor, a controller, a heat dissipation fan, heat dissipation holes, and a filter. When the temperature sensor detects that the temperature inside the shell is too high, since the temperature sensor is electrically connected to the controller, and the controller is electrically connected to the heat dissipation fan, the temperature sensor enters the instruction into the controller, and the controller starts the heat dissipation fan to work, and introduces air into the interior of the shell through a plurality of heat dissipation holes, so that the interior of the shell is automatically cooled, and at the same time, dust in the air is filtered under the setting of the filter.

[0015] 2. The utility model provides a circular frame, an L-shaped limit block, a round rod and a torsion spring. By pushing the circular frame to the left, the circular frame pushes the two L-shaped limit blocks to rotate in opposite directions away from each other on the outer sides of the round rod. While the L-shaped limit block rotates, the torsion spring is twisted, and the circular frame continues to be pushed to the left until it is completely separated from the L-shaped limit block. At this time, the limit on the circular frame can be released, and the filter can be removed, making it easy to remove the filter for cleaning, effectively preventing the filter from being blocked by dust and affecting the heat dissipation effect inside the shell.

[0016] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is the main axonometric structural diagram of the utility model;

[0019] Figure 2 This is a bottom-up sectional axonometric structural diagram of the utility model;

[0020] Figure 3 It is a side view, sectional, axonometric structural diagram of the utility model;

[0021] Figure 4 This is a main sectional isometric structural diagram of the utility model;

[0022] Figure 5 For the utility model Figure 4 A magnified structural diagram of part A.

[0023] Figure numerals: 1, shell; 2, circular frame; 3, filter; 4, limit assembly; 401, L-shaped limit block; 402, round rod; 403, limit block; 404, round hole; 405, torsion spring; 5, heat dissipation hole; 6, controller; 7, temperature sensor; 8, heat dissipation fan; 9, U-shaped frame; 10, rectangular baffle. DETAILED DESCRIPTION

[0024] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0025] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0026] like Figure 1-5 As shown, an embodiment of the utility model provides a portable small current grounding line selection device, including a shell 1, a plurality of heat dissipation holes 5 are opened on the left side and the right side of the inner wall of the shell 1, a circular frame 2 is movably provided on the left and right sides of the shell 1, a filter screen 3 is fixedly installed on the inner wall of the circular frame 2, two limit assemblies 4 are provided on the left and right sides of the shell 1, and the limit assembly 4 includes an L-shaped limit block 401, a circular rod 402, a limit stop block 403, a circular hole 404 and a torsion spring 405.

[0027] In one embodiment, the sides of the two filters 3 that are close to each other are in active contact with the left and right sides of the shell 1 respectively. Under the setting of the filters 3, the air introduced into the shell 1 by the heat dissipation fan 8 is filtered to prevent dust from entering the shell 1.

[0028] In one embodiment, two circular rods 402 are fixedly installed on the left and right sides of the shell 1, and a limit stop block 403 is fixedly installed on one end of the circular rod 402 away from the shell 1. A circular hole 404 is opened on one side of the L-shaped limit block 401, and the L-shaped limit block 401 is movably sleeved on the outer side of the circular rod 402. A torsion spring 405 is wound around the outer side of the circular rod 402, and one end of the torsion spring 405 is fixedly connected to the outer side of the circular rod 402, and the other end of the torsion spring 405 is fixedly connected to the inner wall of the circular hole 404. The torsion spring 405 is twisted by rotating the L-shaped limit block 401, and at the same time, the L-shaped limit block 401 is separated from the circular frame 2, and the fixation of the circular frame 2 is released, so that the circular frame 2 and the filter screen 3 can be removed for cleaning.

[0029] In one embodiment, a heat dissipation fan 8 is fixedly installed on the left side of the inner wall of the shell 1, a controller 6 is fixedly installed on the top of the inner wall of the shell 1, and a temperature sensor 7 is fixedly installed on the right side of the inner wall of the shell 1. The electrical output end of the temperature sensor 7 is electrically connected to the electrical input end of the controller 6, and the electrical output end of the controller 6 is electrically connected to the electrical input end of the heat dissipation fan 8. The temperature inside the shell 1 is detected by the set temperature sensor 7. Since the temperature sensor 7 is electrically connected to the controller 6, when the temperature sensor 7 detects that the temperature is too high, the temperature sensor 7 enters the instruction into the controller 6, and the controller 6 controls the start-up of the heat dissipation fan 8 according to the instruction to dissipate the heat inside the shell 1.

[0030] In one embodiment, a U-shaped frame 9 is fixedly installed on the left and right sides of the shell 1, and a rectangular baffle 10 is fixedly installed on the sides of the two U-shaped frames 9 that are away from each other. The sides of the two rectangular baffles 10 that are close to each other are respectively in movable contact with the sides of the two circular frames 2 that are away from each other, and the inner wall of the U-shaped frame 9 is in movable contact with the outer side of the circular frame 2. The setting of the U-shaped frame 9 and the rectangular baffle 10 makes it easy to position the installation of the circular frame 2.

[0031] In one embodiment, the inner wall of the L-shaped limiting block 401 is in active contact with the outer side of the circular frame 2 , and the circular frame 2 is limited by the provided L-shaped limiting block 401 .

[0032] When the utility model is working: the temperature inside the housing 1 is detected under the action of the temperature sensor 7. When the temperature sensor 7 detects that the temperature inside the housing 1 is high, the temperature sensor 7 will specify the input to the controller 6, and then the controller 6 starts the heat dissipation fan 8 according to the instruction. The heat dissipation fan 8 works to continuously introduce the air on the left side into the interior of the housing 1 through the multiple heat dissipation holes 5 on the left side, and then the air is discharged under the action of the multiple heat dissipation holes 5 on the right side. At the same time, the dust and impurities in the air are filtered under the action of the filter 3, and the interior of the housing 1 is automatically cooled.

[0033] If the filter 3 is not cleaned for a long time, the filter 3 may be clogged with dust. When the filter 3 needs to be removed to clean the dust clogged in the gap, the circular frame 2 is pushed to the left, so that the circular frame 2 pushes the two L-shaped limit blocks 401 to rotate away from each other, and the L-shaped limit blocks 401 rotate on the outside of the round rod 402. While the L-shaped limit blocks 401 rotate, the torsion spring 405 is twisted until the circular frame 2 is completely separated from the two L-shaped limit blocks 401, and the filter 3 can be removed for cleaning.

[0034] When the filter 3 needs to be installed, the two limit assemblies 4 are rotated in opposite directions. While the two limit assemblies 4 are rotating, the torsion spring 405 is twisted, so that one side of the circular frame 2 contacts the outer side of the shell 1, and the circular frame 2 is pushed to the right, so that the circular frame 2 drives the filter 3 to move and contact the inner walls of the two U-shaped frames 9. At the same time, the circular frame 2 is limited under the action of the rectangular baffle 10, and the circular frame 2 is gradually separated from the two L-shaped limit blocks 401. The twisted torsion spring 405 is gradually reset, so that the L-shaped limit block 401 is reset, the circular frame 2 is limited, and the filter 3 is limited at the same time, and the installation of the filter 3 is completed.

[0035] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A portable low-current grounding line selection device, characterized in that: The invention comprises a shell (1), wherein a plurality of heat dissipation holes (5) are provided on the left side and the right side of the inner wall of the shell (1), a circular frame (2) is movably provided on the left side and the right side of the shell (1), a filter screen (3) is fixedly installed on the inner wall of the circular frame (2), and two limit assemblies (4) are provided on the left side and the right side of the shell (1), wherein the limit assemblies (4) comprise an L-shaped limit block (401), a circular rod (402), a limit stopper (403), a circular hole (404) and a torsion spring (405).

2. A portable low-current grounding line selection device according to claim 1, characterized in that: The sides of the two filter screens (3) that are close to each other are in active contact with the left side and the right side of the housing (1) respectively.

3. A portable low-current grounding line selection device according to claim 1, characterized in that: Two circular rods (402) are fixedly mounted on the left and right sides of the shell (1); a limit stopper (403) is fixedly mounted on one end of the circular rod (402) away from the shell (1); a circular hole (404) is provided on one side of the L-shaped limiter (401); the L-shaped limiter (401) is movably sleeved on the outside of the circular rod (402); a torsion spring (405) is wound around the outside of the circular rod (402); one end of the torsion spring (405) is fixedly connected to the outside of the circular rod (402); and the other end of the torsion spring (405) is fixedly connected to the inner wall of the circular hole (404).

4. A portable low-current grounding line selection device according to claim 1, characterized in that: A heat dissipation fan (8) is fixedly mounted on the left side of the inner wall of the shell (1), a controller (6) is fixedly mounted on the top of the inner wall of the shell (1), and a temperature sensor (7) is fixedly mounted on the right side of the inner wall of the shell (1).

5. A portable low-current grounding line selection device according to claim 4, characterized in that: The electrical output end of the temperature sensor (7) is electrically connected to the electrical input end of the controller (6), and the electrical output end of the controller (6) is electrically connected to the electrical input end of the heat dissipation fan (8).

6. A portable low-current grounding line selection device according to claim 1, characterized in that: A U-shaped frame (9) is fixedly mounted on the left and right sides of the shell (1); a rectangular baffle (10) is fixedly mounted on the sides of the two U-shaped frames (9) that are away from each other; the sides of the two rectangular baffles (10) that are close to each other are in active contact with the sides of the two circular frames (2) that are away from each other; and the inner wall of the U-shaped frame (9) is in active contact with the outer side of the circular frame (2).

7. A portable low-current grounding line selection device according to claim 1, characterized in that: The inner wall of the L-shaped limiting block (401) is in movable contact with the outer side of the circular frame (2).

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