Current line selection device

Abstract

The utility model relates to the technical field of power equipment, in particular to a current line selection device, which comprises a line selection shell, a line selection component and a display controller are respectively arranged inside and on the front side of the line selection shell, and the display controller is electrically connected with the line selection component; by starting the motor, the transmission shaft can rotate to drive the two fan blades to reversely move at a high speed, at the moment, the upper half part of the blocking piece rotates due to suction force and gets close to the fixing plate, the lower half part of the blocking piece abuts against the filter screen, a gap is formed between the lower half part of the blocking piece and the fixing opening, and external air can enter from the upper portion of the blocking piece; when the current line selection device does not need to be used, the plugging sheet can rotate and is kept in a vertical state to plug the fixing opening, external dust entering the line selection shell can be effectively reduced, and the service life of the current line selection device is prolonged. Therefore, the operation performance of the current line selection device is improved and the service life of the current line selection device is prolonged.

Description

Technical Field

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

[0002] A low-current grounding system refers to a three-phase system in which the neutral point is not grounded or is grounded through an arc suppression coil and high-impedance grounding. When a grounding fault occurs in one phase, the grounding fault current is often much smaller than the load current because a short-circuit loop cannot be formed. Therefore, a low-current grounding line selection device is used. In order to ensure the heat dissipation capacity of internal electrical appliances, a current line selection device with heat dissipation has now appeared.

[0003] For example, the patent specification of an existing Chinese patent (publication number: CN220795383U) discloses a small current grounding line selection device with high line selection accuracy. The heat dissipation structure can facilitate heat dissipation of the device body. When the device is in use, more heat will be generated. At this time, the device needs to be cooled. The heat dissipation fan can extract the heat inside the device body, and then the heat dissipation fan discharges the heat to the outside through the air inlet.

[0004] However, in the implementation of relevant technologies, it was found that the small current grounding line selection device with high line selection accuracy designed above has the following problems: although the small current grounding line selection device with high line selection accuracy can dissipate heat inside, external dust will enter the device through the air inlet, and not only adhere to the fan blades, but also adhere to the electrical appliances, thereby affecting the performance and thermal conductivity of the electrical appliances. Although a few existing air inlets with filters can block dust, a small amount of fine dust will still enter the device through the holes in the filter.

[0005] In view of this, a current line selection device is provided to overcome the above-mentioned defects. Utility Model Content

[0006] The utility model aims to solve the shortcomings in the prior art and proposes a current line selection device.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a current line selection device, including a line selection shell, wherein the interior and the front side of the line selection shell are respectively provided with line selection components and a display controller, the display controller is electrically connected to the line selection components, the line selection components are used to connect with a transformer device, a fixed opening is opened on one side of the line selection shell, a filter is embedded in the fixed opening, a rotating shaft is rotatably connected in the fixed opening, a sealing piece is fixedly sleeved on the rotating shaft, one side of the sealing piece cooperates with the filter, and a ventilation component is arranged in the line selection shell, which is used to exchange the heat generated in the line selection shell with the outside world.

[0008] As a further description of the above technical solution: the ventilation component includes a fixed plate, which is fixedly installed in the line selection shell, one side of the fixed plate is rotatably connected to a transmission shaft, and two fan blades are arranged on the transmission shaft, and the other side of the fixed plate is provided with a motor, the driving shaft of the motor rotates through the fixed plate and is fixedly connected to one end of the transmission shaft, and the motor is electrically connected to the line selection components.

[0009] As a further description of the above technical solution: a striking block is fixedly installed on the bottom of one side of the sealing piece, and the striking block cooperates with the filter screen to resist each other. When one side of the filter screen is covered with dust, in order not to affect the heat exchange of the filter screen, the sealing piece can drive the striking block to hit the filter screen once when rotating, so as not to affect the heat exchange of the filter screen. The dust adhered to one side of the filter screen can be shaken off, thereby ensuring the air permeability of the filter screen.

[0010] As a further description of the above technical solution: a dust box is fixedly installed on one side of the line selection shell, and the dust box is located obliquely below the fixed port. The dust that is shaken off will fall into the dust box, and the dust can be collected to avoid polluting the environment inside the transformer cabinet.

[0011] As a further description of the above technical solution: two limit shafts are symmetrically fixedly arranged in the ash receiving box, a sealing plate is rotatably sleeved on the limit shaft, and two sensitive springs are movably sleeved on the limit shaft, and the two ends of the sensitive springs are respectively fixedly connected to the sealing plate and the inner wall of the ash receiving box. When dust falls into the ash receiving box, it will also fall on the top of the sealing plate. Since the dust has a certain mass, the sealing plate can be pressed to rotate downward with the limit shaft as the axis and twist the sensitive spring, so that the dust slides into the ash receiving box along the sealing plate, and then the sensitive spring controls the sealing plate to rebound, which can seal the dust in the ash receiving box and the material receiving box to prevent the dust from flying out and adhering to the filter again.

[0012] As a further description of the above technical solution: positioning pieces are fixedly provided on both sides of the line selection shell, and a buffer pad is provided at the bottom of the positioning piece. A plurality of threaded holes are provided in the positioning piece and the buffer pad for threaded insertion of positioning screws. The line selection shell is placed in a cabinet of electrical equipment such as a transformer, and then a plurality of positioning screws are inserted into the threaded holes, and the ends of the positioning screws are extended into the cabinet, so that the line selection shell can be stably installed. In addition, by providing a buffer pad, the buffer pad material can be set to fluororubber. Since fluororubber has good high temperature resistance and elasticity, it can be used in a high temperature environment. The elasticity can be used to buffer the vibration generated by the equipment, which can further improve the stability.

[0013] As a further description of the above technical solution: a placement opening is provided on the front side of the ash receiving box, the placement opening is connected to the inside of the ash receiving box, a receiving box is slidably inserted in the placement opening, and a handle is provided on the front side of the receiving box. By pulling the handle, the receiving box can be pulled out of the placement opening, so that dust in the receiving box can be easily handled.

[0014] The utility model has the following beneficial effects:

[0015] The current line selection device designed by the utility model can turn on the motor to rotate the transmission shaft and drive the two fan blades to move in opposite directions at high speed. At this time, the upper part of the sealing piece rotates due to suction and approaches the fixed plate, and the lower part of the sealing piece will be against the filter and create a gap with the fixed port, so that outside air can enter through the top of the sealing piece, and the internal heat is discharged through the bottom of the sealing piece, so as to achieve the heat exchange effect and conveniently cool the inside of the line selection shell. When the current line selection device is not in use, the sealing piece will rotate and remain in a vertical state to seal the fixed port, which can effectively reduce the entry of external dust into the line selection shell, thereby helping to improve the operating performance of the current line selection device and extend its service life.

[0016] The current line selection device designed by the utility model can drive the striking block to hit the filter when the sealing piece rotates, so that the dust adhered to one side of the filter can be shaken off, thereby ensuring the air permeability of the filter. Then the dust shaken off will fall into the ash box. Because the dust has a certain mass, the sealing plate can be pressed to rotate downward with the limiting axis as the axis and twist the sensitive spring, so that the dust slides into the ash box along the sealing plate. Then the sensitive spring controls the sealing plate to rebound and seal the dust in the ash box and the material box to prevent the dust from flying out and adhering to the filter again. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the interior of the ash receiving box of the utility model in a half-section view;

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the interior of the line selection housing of the utility model in a half-section view;

[0020] Figure 4 For this utility model Figure 2 Enlarged view of point A in the middle.

[0021] Legend:

[0022] 1. Line selection housing; 2. Line selection components; 3. Display controller; 4. Fixing port; 5. Filter; 6. Rotating shaft; 7. Sealing piece; 8. Fixing plate; 9. Transmission shaft; 10. Fan blade; 11. Motor; 12. Striking block; 13. Ash receiving box; 14. Limiting shaft; 15. Sealing plate; 16. Sensitive spring; 17. Positioning piece; 18. Threaded hole; 19. Buffer pad; 20. Placement port; 21. Material receiving box. DETAILED DESCRIPTION

[0023] Reference Figure 1-4 The utility model provides a current line selection device: it includes a line selection shell 1, the interior and front side of the line selection shell 1 are respectively provided with a line selection component 2 and a display controller 3, the display controller 3 is electrically connected to the line selection component 2, the line selection component 2 is used to connect with a transformer device, a fixed port 4 is opened on one side of the line selection shell 1, a filter screen 5 is embedded in the fixed port 4, a rotating shaft 6 is rotatably connected in the fixed port 4, a sealing piece 7 is fixedly sleeved on the rotating shaft 6, one side of the sealing piece 7 cooperates with the filter screen 5 to abut against, a ventilation component is arranged in the line selection shell 1, for exchanging the heat generated in the line selection shell 1 with the outside, the ventilation component includes a fixed plate 8, the fixed plate 8 is fixedly installed in the line selection shell 1, one side of the fixed plate 8 is rotatably connected with a transmission shaft 9, two fan blades 10 are arranged on the transmission shaft 9, a motor 11 is arranged on the other side of the fixed plate 8, the driving shaft of the motor 11 rotates through the fixed plate 8 and is fixedly connected to one end of the transmission shaft 9, and the motor 11 is electrically connected to the line selection component 2.

[0024] During specific implementation, a large amount of heat will be generated when the line selection component 2 is running. At this time, the motor 11 will be automatically turned on while the line selection component 2 is running, so that the transmission shaft 9 rotates and drives the two fan blades 10 to move in opposite directions at high speed. At this time, the upper half of the blocking piece 7 is close to the fixed plate 8 due to the suction generated by the movement of the fan blades 10, and the blocking piece 7 rotates with the rotating shaft 6 as the axis. At this time, the lower half of the blocking piece 7 will be against the filter 5, and the blocking piece 7 will be tilted to create a gap with the fixed port 4, so that outside air enters through the top of the blocking piece 7, and the internal heat will be discharged through the bottom of the blocking piece 7, so as to achieve a heat exchange effect, and it is convenient to cool the inside of the line selection shell 1. In addition, when the current line selection device is not needed, the blocking piece 7 will rotate and remain in a vertical state, so as to block the fixed port 4, which can effectively reduce the entry of external dust into the line selection shell 1, thereby helping to improve the operating performance of the current line selection device and extend its service life.

[0025] As a further implementation of the above technical solution: a striking block 12 is fixedly installed at the bottom of one side of the blocking piece 7, and the striking block 12 cooperates with the filter screen 5 to abut against it. When one side of the filter screen 5 is covered with dust, in order not to affect the heat exchange of the filter screen 5, the blocking piece 7 can drive the striking block 12 to hit the filter screen 5 once when rotating, so as not to affect the heat exchange of the filter screen 5, and the dust adhering to one side of the filter screen 5 can be shaken off, thereby ensuring the air permeability of the filter screen 5.

[0026] As a further implementation of the above technical solution: a dust box 13 is fixedly installed on one side of the line selection housing 1, and the dust box 13 is located obliquely below the fixing port 4. The dust that is shaken off will fall into the dust box 13, and the dust can be collected to avoid polluting the environment in the transformer cabinet.

[0027] As a further implementation scheme of the above technical scheme: two limit shafts 14 are symmetrically fixedly arranged in the ash receiving box 13, a sealing plate 15 is rotatably sleeved on the limit shaft 14, two sensitive springs 16 are movably sleeved on the limit shaft 14, and both ends of the sensitive spring 16 are fixedly connected to the sealing plate 15 and the inner wall of the ash receiving box 13 respectively.

[0028] During specific implementation, based on the above implementation, when the dust falls into the ash box 13, it will also fall on the top of the sealing plate 15. As the dust accumulates more and more, the dust has a certain mass, so the sealing plate 15 can be pressed to rotate downward with the limiting shaft 14 as the axis and twist the sensitive spring 16, so that the dust slides into the ash box 13 along the sealing plate 15. Then the sensitive spring 16 controls the sealing plate 15 to rebound and seal the dust in the ash box 13 and the material box 21, so as to prevent the dust from flying out and adhering to the filter 5 again.

[0029] As a further implementation scheme of the above technical scheme: positioning members 17 are fixedly provided on both sides of the line selection housing 1, and a buffer pad 19 is provided at the bottom of the positioning member 17. A plurality of threaded holes 18 are provided in the positioning member 17 and the buffer pad 19 for threaded insertion of positioning screws. The line selection housing 1 is placed in a cabinet of electrical equipment such as a transformer, and then a plurality of positioning screws are selected into the threaded holes 18, and the ends of the positioning screws are extended into the cabinet, so that the line selection housing 1 can be stably installed. In addition, by providing the buffer pad 19, the material of the buffer pad 19 can be set to be fluororubber. Since fluororubber has good high temperature resistance and elasticity, it can be used in a high temperature environment. The elasticity can be used to buffer the vibration generated by the equipment, which can further improve the stability.

[0030] As a further implementation of the above technical solution: a placement opening 20 is provided on the front side of the ash receiving box 13, the placement opening 20 is connected to the inside of the ash receiving box 13, a material receiving box 21 is slidably inserted in the placement opening 20, and a handle is provided on the front side of the material receiving box 21. By pulling the handle, the material receiving box 21 can be pulled out of the placement opening 20, so that the dust in the material receiving box 21 can be easily handled.

[0031] Working principle:

[0032] When using the utility model, first place the line selection housing 1 in the cabinet of electrical equipment such as transformers, then select multiple positioning screws into the threaded holes 18, and extend the ends of the positioning screws into the cabinet, so that the line selection housing 1 can be stably installed, and then multiple transformer devices are connected to the line selection component 2 inside the line selection housing 1, and the current line selection device can be used. The line selection component 2 usually includes a line selection current transformer, a line selection calculator, a signal acquisition unit, a digital signal processor, a line selection logic processing unit, a control unit, a debugging interface, and a DC power supply. The principle is: the line selection component 2 can monitor the direction and size of the current of the connected device in real time. When the current direction changes or exceeds the set value, the device will automatically adjust to ensure that the current flow direction in the system meets the requirements. In a complex power system, there may be multiple currents that need to be transmitted at the same time. At this time, the current line selection device can divert the current to different lines according to the set parameters to avoid overloading or damaging some equipment. Since the line selection component 2 and even the entire current line selection device are existing well-known technologies, no excessive explanation is given in this manual;

[0033] When the line selection component 2 is running, a large amount of heat will be generated. At this time, the motor 11 will be automatically turned on while the line selection component 2 is running, so that the transmission shaft 9 rotates and drives the two fan blades 10 to move in the opposite direction at high speed. At this time, the upper half of the blocking piece 7 is close to the fixed plate 8 due to the suction force generated by the movement of the fan blades 10, and the blocking piece 7 rotates with the rotating shaft 6 as the axis. At this time, the lower half of the blocking piece 7 will be against the filter screen 5, and the blocking piece 7 will be tilted to create a gap with the fixed port 4, so that the outside air enters through the top of the blocking piece 7, and the internal heat will be discharged through the bottom of the blocking piece 7, so as to achieve the heat exchange effect, and it is convenient to cool down the inside of the line selection shell 1. In addition, when the current line selection device is not needed, the blocking piece 7 will rotate and remain in a vertical state, so as to block the fixed port 4, which can effectively reduce the entry of external dust into the line selection shell 1, thereby helping to improve the operating performance of the current line selection device and extend its service life;

[0034] When one side of the filter 5 is covered with dust, in order not to affect the heat exchange of the filter 5, the sealing piece 7 can be driven by the striking block 12 to hit the filter 5 once when rotating, so that the dust adhered to one side of the filter 5 can be shaken off, thereby ensuring the air permeability of the filter 5. Then the dust shaken off will fall into the ash box 13. As the dust accumulates more and more, the dust has a certain mass, so the sealing plate 15 can be pressed to rotate downward with the limit shaft 14 as the axis and twist the sensitive spring 16, so that the dust slides into the ash box 13 along the sealing plate 15, and then the sensitive spring 16 controls the sealing plate 15 to rebound and seal the dust in the ash box 13 and the material box 21, so as to prevent the dust from flying out and adhering to the filter 5 again. Finally, the handle is pulled to pull the material box 21 out of the placement port 20, so that the dust in the material box 21 can be easily handled.

[0035] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A current line selection device, comprising a line selection housing (1), wherein a line selection component (2) and a display controller (3) are respectively arranged inside and on the front side of the line selection housing (1), wherein the display controller (3) is electrically connected to the line selection component (2), wherein the line selection component (2) is used to be connected to a transformer device, wherein a fixing opening (4) is provided on one side of the line selection housing (1), wherein a filter screen (5) is embedded in the fixing opening (4), wherein the fixing opening (4) is characterized in that: A rotating shaft (6) is rotatably connected in the fixed opening (4), a sealing piece (7) is fixedly sleeved on the rotating shaft (6), one side of the sealing piece (7) cooperates with the filter screen (5) to abut against the filter screen, and a ventilation component is provided in the line selection housing (1) for exchanging heat generated in the line selection housing (1) with the outside.

2. A current line selection device according to claim 1, characterized in that: The ventilation component comprises a fixing plate (8), wherein the fixing plate (8) is fixedly mounted in a line selection housing (1), one side of the fixing plate (8) is rotatably connected to a transmission shaft (9), and two fan blades (10) are arranged on the transmission shaft (9), and the other side of the fixing plate (8) is provided with a motor (11), and the driving shaft of the motor (11) rotatably passes through the fixing plate (8) and is fixedly connected to one end of the transmission shaft (9), and the motor (11) is electrically connected to the line selection component (2).

3. A current line selection device according to claim 1, characterized in that: A striking block (12) is fixedly mounted on the bottom of one side of the blocking piece (7), and the striking block (12) cooperates with the filter screen (5) to abut against each other.

4. A current line selection device according to claim 1, characterized in that: An ash receiving box (13) is fixedly mounted on one side of the line selection housing (1), and the ash receiving box (13) is located obliquely below the fixing opening (4).

5. A current line selection device according to claim 4, characterized in that: Two limit shafts (14) are symmetrically fixedly arranged in the ash receiving box (13), a sealing plate (15) is rotatably sleeved on the limit shaft (14), two sensitive springs (16) are movably sleeved on the limit shaft (14), and two ends of the sensitive springs (16) are respectively fixedly connected to the sealing plate (15) and the inner wall of the ash receiving box (13).

6. A current line selection device according to claim 1, characterized in that: Positioning members (17) are fixedly provided on both sides of the line selection housing (1), a buffer pad (19) is provided at the bottom of the positioning member (17), and a plurality of threaded holes (18) are provided in the positioning member (17) and the buffer pad (19) for threadedly inserting positioning screws.

7. A current line selection device according to claim 4, characterized in that: The front side of the ash receiving box (13) is provided with a placement opening (20), the placement opening (20) is communicated with the interior of the ash receiving box (13), a material receiving box (21) is slidably inserted into the placement opening (20), and a handle is provided on the front side of the material receiving box (21).

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