Protective cover of low-voltage knife switch

Abstract

The invention relates to the technical field of low-voltage knife switches, in particular to a protective cover of a low-voltage knife switch, which comprises a frame body, a protective cover and a protective cover, the cover body is hinged to the frame body, and a trigger head is arranged at the position, corresponding to the inductive head, of the cover body; a point contact switch is arranged in the inductive head, and when the cover body and the frame body are in a closed state, the point contact switch is in a triggered state; the point contact switch of the inductive head is connected with the earth leakage protection switch of the low-voltage knife switch, when the point contact switch is in a trigger state, the setting value of the earth leakage protection switch is a normal value, and when the point contact switch is not in the trigger state, the setting value of the earth leakage protection switch is reduced to a safety maintenance range. When the cover body is closed, the trigger head is inserted into the inductive head to trigger the point contact switch, so that the setting value of the leakage protection switch is kept to guarantee normal work of equipment; and when the cover body is opened for maintenance, the point contact switch loses triggering, the setting value is reduced to a safety range, and electric leakage triggers the tripping mechanism to be switched off, so that the safety of maintenance personnel is guaranteed in all directions.

Description

Technical Field

[0001] This invention relates to the field of low-voltage disconnect switch technology, and in particular to a protective cover for a low-voltage disconnect switch. Background Technology

[0002] Low-voltage disconnectors are commonly used power distribution equipment in power systems and are widely used for the switching control and isolation of low-voltage lines. However, traditional low-voltage disconnectors lack dedicated protective devices, and the exposed conductive components are susceptible to the effects of external environments such as dust, rain, and corrosive gases, leading to decreased insulation performance, accelerated component aging, and increased safety hazards such as short circuits and leakage. In the use of existing low-voltage disconnectors, except for the operating handle, the other wiring sides and the disconnector body are exposed. During low-voltage outgoing line maintenance, workers are prone to accidentally touching the energized disconnector and the conductors at the wiring points, posing a risk of electric shock and insufficient safety.

[0003] Therefore, a protective cover for a low-voltage switch is proposed. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that operators are prone to accidentally touching live disconnectors and conductors at wiring points, which poses a risk of electric shock and is not safe enough.

[0005] The above-mentioned technical problems are solved by the following technical solution: This invention proposes a protective cover for a low-voltage switch, comprising, The frame has a sensor head mounted on it; A cover is hinged to the frame, and a trigger head is provided on the cover corresponding to the sensor head. The sensor head is equipped with a touch switch, which is triggered when the cover and frame are in the closed state. The touch switch of the sensing head is connected to the leakage protection switch of the low-voltage knife switch. When the touch switch is in the triggered state, the setting value of the leakage protection switch is in the normal value. When the touch switch is not in the triggered state, the setting value of the leakage protection switch is reduced to the safe maintenance range. When the setting value of the residual current circuit breaker is within the safe maintenance range, when the residual current circuit breaker of the low-voltage disconnector is triggered, the tripping actuator of the low-voltage disconnector executes the disconnection command. When the setting value of the residual current circuit breaker returns to the normal value, the tripping actuator executes the closing command.

[0006] In a preferred embodiment of the protective cover for the low-voltage switch of the present invention, it further includes a mounting mechanism disposed on the frame; The installation mechanism includes a deflection block movably mounted on the frame and a rubber pressure rod mounted on the deflection block.

[0007] In a preferred embodiment of the protective cover of the low-voltage switch of the present invention: the deflection block is arranged in an arc shape, and the included angle formed by the deflection block and the inner wall of the frame on the side closer to the cover is smaller than the included angle on the side farther from the cover.

[0008] In a preferred embodiment of the protective cover for the low-voltage switch of the present invention: the installation mechanism further includes a pull rope disposed on the deflection block, the pull rope being disposed through the frame.

[0009] In a preferred embodiment of the protective cover for the low-voltage switch of the present invention: the installation mechanism further includes a pull block disposed at one end of the pull rope, and a tension spring is provided on the side of the pull block near the frame, and the tension spring is sleeved on the outside of the pull rope.

[0010] In a preferred embodiment of the protective cover for the low-voltage switch of the present invention, it further includes a wire harness protection mechanism disposed on the frame and the cover. The wire harness protection mechanism includes a wire insertion port, a fixed brush and a movable brush disposed in the wire insertion port, and a screw. The outer wall of the screw is threadedly connected to a threaded block, and a sliding plate is provided on the threaded block. The movable brush is located on the sliding plate.

[0011] In a preferred embodiment of the protective cover for the low-pressure switch of the present invention, a temperature sensor is further provided on the frame. The surface of the frame is provided with ventilation mesh; The frame is equipped with an electric gate at the ventilation mesh openings; When the temperature sensor detects that the temperature difference between the inside and outside of the frame exceeds the set threshold, the electric gate opens.

[0012] In a preferred embodiment of the protective cover for the low-voltage switch of the present invention: the frame and the cover are made of transparent material.

[0013] In a preferred embodiment of the protective cover for the low-voltage switch of the present invention: a metal block is provided on the frame; The cover is equipped with a handle and a magnet; The magnet and the metal block are positioned relative to each other.

[0014] In a preferred embodiment of the protective cover for the low-voltage switch of the present invention, it further includes a solar panel disposed on the cover and a power supply disposed on the frame.

[0015] The beneficial effects of this invention are as follows: when the cover is closed, the trigger head is inserted into the sensing head to trigger the contact switch, so that the setting value of the leakage protection switch is kept at 100mA to ensure the normal operation of the equipment; when the cover is opened for maintenance, the contact switch loses its trigger and the setting value drops to the safe range of 10mA. At this time, the leakage will trigger the tripping mechanism to disconnect the circuit breaker. The circuit breaker will only be closed after the setting value is restored after the cover is closed, thus ensuring the safety of maintenance personnel in all aspects. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0017] Figure 1 A schematic diagram of the overall structure of the protective cover for the low-voltage switch is shown.

[0018] Figure 2 A reference diagram showing the open state of the protective cover of the low-voltage switch is shown.

[0019] Figure 3 It shows Figure 2 Enlarged view of point A in the middle.

[0020] Figure 4 A schematic diagram of the connection structure of the protective cover of the low-voltage switch, the electric switch plate, and the power supply is shown.

[0021] Figure 5 A first cross-sectional structural schematic diagram of the protective cover of the low-voltage switch is shown.

[0022] Figure 6 It shows Figure 5 Enlarged view of section B in the middle.

[0023] Figure 7 A second cross-sectional view of the protective cover of the low-voltage switch is shown.

[0024] Figure 8 A reference diagram showing the positions of the metal blocks and magnets in the protective cover of the low-voltage switch is provided.

[0025] In the picture: 1. Frame; 11. Sensor head; 12. Ventilation mesh; 13. Metal block; 2. Cover; 21. Trigger head; 22. Handle; 23. Magnet; 3. Installation mechanism; 31. Deflection block; 32. Rubber pressure rod; 33. Pull rope; 34. Pull block; 35. Tension spring; 4. Wire harness protection mechanism; 41. Wire threading port; 42. Fixed brush; 43. Movable brush; 44. Screw; 45. Threaded block; 46. Sliding plate; 5. Temperature sensor; 6. Electric gate; 7. Solar panel; 8. Power supply. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0027] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0028] Reference Figures 1-8 This embodiment provides a protective cover for a low-voltage switch, including a frame 1 with a sensor head 11 on it; a cover 2 hinged to the frame 1, and a trigger head 21 corresponding to the sensor head 11 on the cover 2; the sensor head 11 and the trigger head 21 are located on the same side, and the trigger head 21 can be inserted into the sensor head 11 when the cover 2 is closed.

[0029] The frame 1 and cover 2 are made of transparent material, which makes it easy to inspect the internal low-voltage switch.

[0030] It should be noted that the frame 1 has a C-shaped structure and the cover 2 has an L-shaped structure. When the cover 2 and the frame 1 are in the closed state, the cover 2 and the frame 1 form a box-shaped structure with an opening.

[0031] The sensor head 11 is equipped with a touch switch. When the cover 2 and the frame 1 are in the closed state, the touch switch is in the triggered state. When the cover 2 is closed, the trigger head 21 is inserted into the sensor head 11 and squeezes the touch switch in the sensor head 11. After being squeezed, the touch switch is in the triggered state. That is, when the cover 2 is kept closed, the touch switch is always in the triggered state.

[0032] The touch switch of the induction head 11 is connected to the leakage protection switch of the low-voltage knife switch. When the touch switch is in the triggered state, the setting value of the leakage protection switch is in the normal value. When the touch switch is not in the triggered state, the setting value of the leakage protection switch is reduced to the safe maintenance range. It should be noted that low-voltage disconnectors are usually connected to residual current circuit breakers (RCCBs). When the low-voltage disconnector is working normally, the RCCB setting is 100mA. When the contact switch is in the triggered state, the RCCB receives the "equipment normal" command, and the RCCB setting is 100mA. When maintenance work is required, that is, when cover 2 needs to be opened, after cover 2 is opened, the contact switch is no longer pressed and is no longer in the triggered state. The RCCB stops receiving the "equipment normal" command. At this time, the RCCB will automatically adjust its setting to reduce it to 10mA to protect the safety of maintenance personnel and allow them to perform maintenance.

[0033] When the setting value of the residual current circuit breaker is within the safe maintenance range, when the residual current circuit breaker of the low-voltage disconnector is triggered, the tripping actuator of the low-voltage disconnector executes the disconnection command. When the setting value of the residual current circuit breaker returns to the normal value, the tripping actuator executes the closing command.

[0034] It should be noted that all low-voltage disconnectors are connected to a tripping actuator. The tripping actuator is used to perform opening and closing operations. When in maintenance mode, that is, when the setting value of the residual current circuit breaker is 10mA, if an electric shock occurs and the residual current circuit breaker is triggered to perform protection, the tripping actuator will automatically perform the opening operation, that is, the disconnection command. This will continue until the maintenance is completed and the cover 2 is closed again, that is, after the maintenance is completed and the setting value of the residual current circuit breaker returns to the normal value. Only then will the tripping actuator send a command to close the circuit, so as to ensure the normal operation of maintenance personnel.

[0035] The frame 1 is provided with a metal block 13; the cover 2 is provided with a handle 22 and a magnet 23; the magnet 23 and the metal block 13 are located in opposite positions.

[0036] The metal block 13 and magnet 23 facilitate the closing and opening of the cover 2.

[0037] In summary, the low-voltage switch protective cover offers significant advantages: the transparent frame 1 and cover 2 facilitate viewing of the internal switch status; when cover 2 is closed, the trigger head 21 inserts into the sensing head 11 to trigger the contact switch, maintaining the leakage protection switch setting value at 100mA to ensure normal equipment operation; when cover 2 is opened for maintenance, the contact switch loses its triggering function, and the setting value drops to the safe range of 10mA. At this time, leakage current will trigger the tripping mechanism to disconnect the circuit breaker. After cover 2 is closed, the setting value returns to normal before the circuit breaker is closed again, ensuring the safety of maintenance personnel in all aspects.

[0038] Reference Figures 1-8 As an optional embodiment, it also includes a mounting mechanism 3 disposed on the frame 1; it should be noted that there are two sets of mounting mechanisms 3, which are symmetrically disposed on both sides of the frame 1.

[0039] The mounting mechanism 3 includes a deflection block 31 movably mounted on the frame 1, and a rubber pressure rod 32 mounted on the deflection block 31.

[0040] Reference Figure 4 and Figure 6 It should be noted that there are several deflection blocks 31 arranged in a horizontal array. The deflection blocks 31 can produce a slight angular deflection, and the deflection angle is limited. Preferably, the deflection angle is 1-2°.

[0041] Several deflection blocks 31 are connected together to the same rubber pressure rod 32, which is used to abut against the assembly plate of the low-voltage switch.

[0042] Preferably, the deflection block 31 is arranged in an arc shape, and the angle formed by the deflection block 31 and the inner wall of the frame 1 on the side closer to the cover 2 is smaller than the angle on the side farther from the cover 2.

[0043] Reference Figure 5 and Figure 6 It should be noted that the mounting plate of the low-voltage switch has corresponding abutment surfaces on both sides. When the rubber pressure rod 32 abuts against the abutment surface on the mounting plate, if the frame 1 is subjected to a pull-out force away from the mounting plate, the rubber pressure rod 32 will have a downward deflection tendency. This is because the friction force it receives is downward, while the deflection block 31 is tilted upward. Therefore, the deflection block 31 cannot deflect due to the abutment surface, which forms a fixation on the frame 1, preventing it from being pulled out and separated from the mounting plate.

[0044] In addition, the initial distance between the two rubber pressure rods 32 is set to match the distance between the two contact surfaces. Since the deflection block 31 can only deflect at a small angle, and given the deformability of the rubber itself, when installing the frame 1 onto the assembly plate, the frame 1 can be directly aligned with the assembly plate and inserted. During the insertion process, the deflection block 31 can guide and position the frame until the two rubber pressure rods 32 abut against the two contact surfaces, thus installing the frame 1.

[0045] Preferably, the installation mechanism 3 also includes a pull rope 33 disposed on the deflection block 31, the pull rope 33 being disposed through the frame 1.

[0046] Pulling the pull rope 33 can cause the deflection block 31 to deflect slightly. After pulling the pull rope 33, the force of the rubber pressure rod 32 against the contact surface is reduced. Therefore, the pulling force balances the contact force of the rubber pressure rod 32. At this time, the frame 1 is pulled up. Since the friction between the rubber pressure rod 32 and the contact surface is reduced, the frame 1 can be removed smoothly, thus disassembling the frame 1.

[0047] The mounting mechanism 3 also includes a pull block 34 located at one end of the pull rope 33. A tension spring 35 is provided on the side of the pull block 34 near the frame 1. The tension spring 35 is sleeved on the outside of the pull rope 33. The tension spring 35 can provide tension so that the pull block 34 is always close to and attached to the outside of the frame 1. In addition, one end of the tension spring 35 is fixedly connected to the outer wall of the frame 1.

[0048] When installing the protective cover, simply align the frame 1 with the mounting plate of the low-voltage switch and insert it, so that the rubber pressure rod 32 abuts against the contact surface. When pulling the frame 1 outward, the friction force exerted by the rubber pressure rod 32 on the contact surface will form a lock. The greater the pulling force, the stronger the locking force becomes, which can prevent the protective cover from being accidentally removed or falling off, greatly improving the installation efficiency. In addition, there is no need to change the original low-voltage switch structure during installation, and it can be directly adapted to the previous low-voltage switch mounting plate, reducing the cost of modification. When replacing or disassembling the protective cover, by pulling the pull blocks 34 on both sides, the rubber pressure rod 32 is slightly deflected by the pull rope 33, so that the pulling force and the force of the rubber pressure rod 32 against the contact surface are balanced. At this time, the frame 1 can be lifted directly to disassemble the protective cover.

[0049] Alternatively, the deflection block 31 does not need to be set to a slightly deflectable state. The same installation and disassembly effect can be achieved by making the deflection block 31 with a slightly deformable material.

[0050] Reference Figures 1-8 As an optional embodiment, it also includes a wire harness protection mechanism 4 disposed on the frame 1 and the cover 2; it should be noted that there are several wire harness protection mechanisms 4, arranged in two groups, as shown in the figure. Figure 4 There are three wire harness protection mechanisms 4 on the frame 1, forming a group, and three wire harness protection mechanisms 4 on the cover 2, forming a group. The three wire harness protection mechanisms 4 in the two groups are arranged in a one-to-one correspondence, which is used to allow the wire harness connected to the low voltage switch to pass through.

[0051] The wire harness protection mechanism 4 includes a wire pass-through port 41, a fixed brush 42 and a movable brush 43 disposed in the wire pass-through port 41, and a screw 44. The outer wall of the screw 44 is threadedly connected to a threaded block 45. A sliding plate 46 is provided on the threaded block 45, and the movable brush 43 is located on the sliding plate 46.

[0052] A screw 44 is threaded through the frame 1 or the cover 2. Three threaded blocks 45 are threadedly connected to the same screw 44. The threaded blocks 45 can only slide and cannot rotate. A sliding plate 46 is slidably disposed within the frame 1 or the cover 2. By rotating the screw 44, multiple threaded blocks 45 can slide simultaneously, causing the sliding plate 46 to slide simultaneously. This causes the movable brush 43 and the fixed brush 42 to move closer to each other. The bristles on the movable brush 43 and the fixed brush 42 are staggered. The wire harness passes through the wire insertion port 41. After the movable brush 43 approaches the fixed brush 42, the bristles of the two brushes interlock to form a closed state, sealing the gap in the wire insertion port 41. This achieves a dustproof effect, preventing dust, insects, and rainwater from entering.

[0053] Reference Figures 1-8 As an optional embodiment, it also includes a temperature sensor 5 disposed on the frame 1; the temperature sensor 5 can detect the temperature inside the box structure formed by the frame 1 and the cover 2, as well as the temperature outside the box structure, and detect the temperature difference between the inside and outside of the protective cover.

[0054] The surface of the frame 1 is provided with ventilation mesh 12; the ventilation mesh 12 is used to achieve ventilation inside and outside the protective cover.

[0055] An electric gate 6 is provided at the ventilation mesh 12 of the frame 1; the electric gate 6 can be opened and closed to block and close the ventilation mesh 12, or to open the ventilation mesh 12 to ventilate the inside of the protective cover.

[0056] It should be noted that the electric gate 6 consists of a plate and a screw and slide rail structure. The screw and slide rail structure controls the displacement of the plate, thereby opening and closing the ventilation mesh 12.

[0057] When the temperature sensor 5 detects that the temperature difference between the inside and outside of the frame 1 exceeds the set threshold, the electric gate 6 opens.

[0058] It also includes a solar panel 7 installed on the cover 2 and a power supply 8 installed on the frame 1. The solar panel 7 is used to convert light energy into electrical energy and store it in the power supply 8. The power supply 8 and the solar panel 7 are used to power the electric gate 6, temperature sensor 5 and other equipment.

[0059] When in use, the low-voltage switch will generate heat, and the temperature inside the protective cover will rise. When the temperature sensor 5 detects that the temperature difference between the inside and outside of the protective cover is too large and exceeds the set threshold, a command is sent to control the electric gate 6 to open, so that the ventilation mesh 12 opens, forming an air circulation channel between the inside and outside of the protective cover and the external environment. Through natural ventilation, the internal and external temperatures are balanced, the heat accumulated inside is removed, and any moisture that may be formed is dispelled. This quickly restores the internal temperature and humidity balance and avoids water mist that may be generated due to the difference between the internal and external environments, which could cause the circuit to become damp.

[0060] When the temperature sensor 5 detects that the temperature difference between the inside and outside has returned to the set threshold, it issues another command to control the electric gate 6 to re-close the ventilation mesh 12, ensuring that the sealing performance of the protective cover is not affected and effectively blocking the intrusion of external dust, rainwater, insects and other debris.

[0061] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A protective cover for a low-voltage disconnect switch, characterized in that: include, A frame (1) is provided with a sensor head (11). The cover (2) is hinged to the frame (1), and the cover (2) is provided with a trigger head (21) at the corresponding sensor head (11). The sensor head (11) is equipped with a touch switch. When the cover (2) and the frame (1) are in a closed state, the touch switch is in a triggered state. The touch switch of the sensing head (11) is connected to the leakage protection switch of the low-voltage knife switch. When the touch switch is in the triggered state, the setting value of the leakage protection switch is in the normal value. When the touch switch is not in the triggered state, the setting value of the leakage protection switch is reduced to the safe maintenance range. When the setting value of the residual current circuit breaker is within the safe maintenance range, when the residual current circuit breaker of the low-voltage disconnector is triggered, the tripping actuator of the low-voltage disconnector executes the disconnection command. When the setting value of the residual current circuit breaker returns to the normal value, the tripping actuator executes the closing command.

2. The protective cover for the low-voltage disconnect switch according to claim 1, characterized in that: It also includes a mounting mechanism (3) provided on the frame (1); The installation mechanism (3) includes a deflection block (31) movably mounted on the frame (1) and a rubber pressure rod (32) mounted on the deflection block (31).

3. The protective cover for the low-voltage disconnect switch according to claim 2, characterized in that: The deflection block (31) is arranged in an arc shape, and the angle formed by the deflection block (31) and the inner wall of the frame (1) on the side closer to the cover (2) is smaller than the angle on the side farther away from the cover (2).

4. The protective cover for the low-voltage disconnect switch according to claim 3, characterized in that: The installation mechanism (3) also includes a pull rope (33) on the deflection block (31), which passes through the frame (1).

5. The protective cover for the low-voltage disconnect switch according to claim 4, characterized in that: The installation mechanism (3) also includes a pull block (34) located at one end of the pull rope (33). The pull block (34) has a tension spring (35) on the side near the frame (1). The tension spring (35) is sleeved on the outside of the pull rope (33).

6. The protective cover for the low-voltage disconnect switch according to any one of claims 1 to 5, characterized in that: It also includes a wire protection mechanism (4) provided on the frame (1) and the cover (2); The wire harness protection mechanism (4) includes a wire insertion port (41), a fixed brush (42) and a movable brush (43) disposed in the wire insertion port (41), and a screw (44). The outer wall of the screw (44) is threadedly connected to a threaded block (45). A sliding plate (46) is provided on the threaded block (45), and the movable brush (43) is located on the sliding plate (46).

7. The protective cover for the low-voltage disconnect switch according to claim 1, characterized in that: It also includes a temperature sensor (5) disposed on the frame (1); The surface of the frame (1) is provided with ventilation mesh (12); An electric gate (6) is provided at the ventilation mesh (12) of the frame (1); When the temperature sensor (5) detects that the temperature difference between the inside and outside of the frame (1) exceeds the set threshold, the electric gate (6) opens.

8. The protective cover for the low-voltage disconnect switch according to claim 1, characterized in that: The frame (1) and cover (2) are made of transparent material.

9. The protective cover for the low-voltage disconnect switch according to claim 1, characterized in that: The frame (1) is provided with a metal block (13); The cover (2) is provided with a handle (22) and a magnet (23); The magnet (23) and the metal block (13) are positioned relative to each other.

10. The protective cover for the low-voltage disconnect switch according to any one of claims 7 to 9, characterized in that: It also includes a solar panel (7) disposed on the cover (2) and a power supply (8) disposed on the frame (1).

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