A safety disconnection device

Abstract

The utility model relates to electric power construction technical field, and disclose a kind of safety power-off equipment, comprising: electric box, the inner wall of electric box is equipped with several switches;Shielding structure, shielding structure includes baffle, first installation slot, second installation slot and avoidance slot, baffle is slidably arranged in the front of switch, the front wall of baffle is through first installation slot, second installation slot and avoidance slot, when the handle of switch is lifted and is closed, handle will push baffle and move up, along with baffle and move up, first installation slot and second installation slot are respectively with the incoming and outgoing line terminal of switch misregistration, to reach the purpose of closed switch cannot be wired, and when the handle of switch falls and is powered off, first installation slot is aligned with the incoming line terminal of switch, second installation slot is aligned with the outgoing line terminal of switch, wiring terminal is shielded by mechanical structure, is shielded when closed, eliminate live working, improve safety and protection performance, reduce the risk of electric arc burn and short-circuit accident.

Description

Technical Field

[0001] This utility model relates to the field of power construction technology, and in particular to a safety power-off device. Background Technology

[0002] During power construction, power disconnection equipment is a commonly used device for controlling the on / off state of power lines.

[0003] A search revealed an existing technology that discloses an automatic power-off safety power supply device (announcement number: CN116960788A), comprising a housing; the housing has a door hinged to its front end, a mounting plate on the rear wall, and evenly spaced cable outlet holes on the bottom wall; a box is located at the front end of the mounting plate, and a cover is snapped onto the front end of the box; wiring boards are installed in the mounting holes at both the top and bottom ends of the box, and wiring holes are opened at the opposite outer ends of the wiring boards; a mounting base is located inside the box, and a fuse is placed inside the mounting base; a locking block is located at the front end of each wiring board, and the fuse is installed in conjunction with the locking block; a pressure plate is symmetrically rotatably connected to the left wall of the box via a rotating seat.

[0004] In the existing technology, the terminals of the switches that control the opening and closing of the circuit are mostly exposed. Some people will take the initiative to do live work for convenience, that is, to connect or disconnect the wires when the switch is closed, without following the rule that the power must be disconnected before plugging or unplugging. This can easily lead to electric arc burns and short circuit accidents.

[0005] Therefore, we propose a safe power-off device. Utility Model Content

[0006] The present invention mainly addresses the technical problem of the risks associated with operating exposed terminals while they are energized, and provides a safe power-off device.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a safety power-off device, comprising: An electrical box, the inner wall of which is equipped with several switches; A protective structure is installed on the inner wall of the electrical box to shield the terminals of the switch. The protective structure includes a baffle, a first mounting groove, a second mounting groove, and a clearance groove. The baffle is slidably disposed in front of the switch. The front wall of the baffle is formed by the first mounting groove, the second mounting groove, and the clearance groove. The handle of the switch passes through the clearance groove. When the clearance groove is closed, the first mounting groove and the second mounting groove are misaligned with the incoming and outgoing terminals of the switch, respectively.

[0008] In a preferred embodiment of this utility model, the baffle is a rectangular plate with a cross-sectional dimension larger than that of the switch. The first mounting groove and the second mounting groove are rectangular grooves of equal size. The height of the baffle is greater than the rotation stroke of the switch handle, and the handle does not interfere with the switch.

[0009] In a preferred embodiment of this utility model, the protective structure further includes mounting rods, with one mounting rod on each side of the baffle. The mounting rods are locked to the electrical box by bolts, and the baffle can slide vertically along the mounting rods.

[0010] In a preferred embodiment of this utility model, the protective structure further includes an anti-detachment groove, the mounting rod is formed into an L-shaped folded rod, the vertical part of the mounting rod has an anti-detachment groove, and the baffle is located in the anti-detachment groove.

[0011] In a preferred embodiment of this utility model, the anti-detachment groove is a rectangular groove, the baffle is fitted with the anti-detachment groove with a clearance, and two parallel mounting rods together limit and guide the baffle.

[0012] In a preferred embodiment of this utility model, the protective structure further includes a limiting protrusion and a sliding channel. The inner wall of the mounting rod is provided with an anti-detachment groove. The limiting protrusion is fixedly connected to the baffle and is slidably disposed in the sliding channel.

[0013] In a preferred embodiment of this utility model, the sliding channel is a rectangular groove, the side length of the sliding channel is less than the length of the mounting rod, the limiting protrusion forms a rectangular block that fits the sliding channel with a clearance, the front and rear walls of the baffle are provided with the same limiting protrusion, and the inner front and inner rear walls of the mounting rod are provided with the same sliding channel.

[0014] This utility model provides a safe power-off device. It has the following beneficial effects: 1. This safety power-off device, when the switch handle is raised to close the circuit, pushes the baffle upward. As the baffle moves upward, the first and second mounting slots are misaligned with the switch's inlet and outlet terminals, respectively. At this time, the connected wires cannot be loosened or removed with a screwdriver, thus achieving the purpose of preventing wiring when the circuit is closed. When the switch handle is lowered to de-energize, the baffle falls, the first mounting slot aligns with the switch's inlet terminal, and the second mounting slot aligns with the switch's outlet terminal. The mechanical structure blocks the wiring terminals, preventing live operation when the circuit is closed, improving safety and protection performance, and reducing the risk of arc burns and short circuit accidents.

[0015] 2. This safety power-off device guides the baffle through two parallel mounting rods, and the baffle slides in the corresponding sliding channel with the limiting protrusions on the front and rear walls of the baffle. The anti-disengagement groove is used to guide and limit the baffle, ensuring the stability of the vertical sliding of the baffle. Thus, when the switch handle is opened or closed, the first mounting groove and the second mounting groove can be precisely aligned with the wiring terminals of the switch. Attached Figure Description

[0016] Figure 1 This is a perspective view of the entire utility model; Figure 2 This is a perspective view of the switch and baffle of this utility model; Figure 3 This is a schematic diagram of the baffle sliding down according to this utility model; Figure 4 This is a perspective view of the mounting rod of this utility model; Figure 5 This is a perspective view of the baffle of this utility model.

[0017] Legend: 10. Electrical box; 11. Switch; 20. Baffle; 21. First mounting slot; 22. Second mounting slot; 23. Clearance slot; 24. Limiting protrusion; 30. Mounting rod; 31. Anti-detachment slot; 32. Sliding channel. Detailed Implementation

[0018] A safety power-off device, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes: Electrical box 10, with several switches 11 installed on its inner wall; A protective structure, installed on the inner wall of the electrical box 10, is used to shield the terminals of the switch 11. The protective structure includes a baffle 20, a first mounting groove 21, a second mounting groove 22, and a clearance groove 23. The baffle 20 is slidably disposed in front of the switch 11. The front wall of the baffle 20 has the first mounting groove 21, the second mounting groove 22, and the clearance groove 23 extending through it. The handle of the switch 11 passes through the clearance groove 23. When the clearance groove 23 is closed, the first mounting groove 21 and the second mounting groove 22 are misaligned with the incoming and outgoing terminals of the switch 11, respectively. The baffle 20 is a rectangular plate with a cross-sectional area of ​​[missing information]. The dimensions of the baffle 20 are greater than the cross-sectional dimensions of the switch 11. The first mounting groove 21 and the second mounting groove 22 are rectangular grooves of equal size. The height of the baffle 20 is greater than the rotation stroke of the handle of the switch 11. The handle does not interfere with the switch 11. The upper edge of the clearance groove 23 is provided with an integrally formed wedge block or inclined surface. When the handle rotates from the open position (vertically downward) to the closed position (vertically upward), the outer edge of the handle will contact the inclined surface of the wedge block and generate an upward component force, thereby reliably pushing the baffle 20 to slide upward until the handle is completely inserted into the top of the clearance groove 23. In this design, the terminal fastening bolts for wiring are located on the front wall of switch 11. To ensure proper operation where the power is off before plugging or unplugging, when the handle of switch 11 is raised to close the circuit, the handle pushes the baffle 20 upward. As the baffle 20 moves upward, the first mounting groove 21 and the second mounting groove 22 are misaligned with the inlet and outlet terminals of switch 11, respectively. At this time, the connected wires cannot be loosened or removed with a screwdriver, thus achieving the purpose of preventing wiring when the circuit is closed. When the handle of switch 11 is lowered to de-energize the circuit, the baffle 20 falls, the first mounting groove 21 aligns with the inlet terminal of switch 11, and the second mounting groove 22 aligns with the outlet terminal of switch 11. The wiring terminals are blocked by the mechanical structure, preventing live operation when the circuit is closed, thus improving safety and protection performance. The baffle 20 can be reset by its own gravity or by manual pushing.

[0019] like Figure 4 and Figure 5 As shown, the protective structure also includes mounting rods 30. One mounting rod 30 is provided on each side of the baffle 20. The mounting rods 30 are bolted to the electrical box 10. The baffle 20 can slide vertically along the mounting rods 30. The protective structure also includes an anti-detachment groove 31. The mounting rods 30 form L-shaped folded rods, and the vertical portion of the mounting rods 30 has an anti-detachment groove 31. The baffle 20 is located within the anti-detachment groove 31, which is a rectangular groove. The baffle 20 and the anti-detachment groove 31 are clearance-fitted. The two parallel mounting rods 30 together limit and guide the baffle 20. The protective structure also includes a limiting protrusion 24 and a sliding channel 32. The inner wall of the mounting rod 30 has an anti-detachment groove 31. The limiting protrusion 24 is fixedly connected to the baffle 20, and the limiting protrusion 24 can slide. The sliding channel 32 is a rectangular groove, and its side length is less than that of the mounting rod 30. The limiting protrusion 24 forms a rectangular block that fits the sliding channel 32 with a clearance. The front and rear walls of the baffle 20 are provided with the same limiting protrusion 24. The inner front and inner rear walls of the mounting rod 30 are provided with the same sliding channel 32. The left and right sides of the baffle 20 are each provided with two limiting protrusions 24, which are located at the upper and lower parts of the baffle height, respectively. Correspondingly, two parallel sliding channels 32 are opened on the front and rear walls of each mounting rod 30. Through the cooperation of the four sets of protrusions and channels, a four-point positioning and guiding system is formed, which effectively prevents the baffle 20 from swaying and tilting in the front, back and left and right during the sliding process. In this scheme, in order to improve the stability of the sliding of the baffle 20, two parallel mounting rods 30 are used to guide the baffle 20. The limiting protrusions 24 on the front and rear walls of the baffle 20 slide in the corresponding sliding channels 32. The anti-disengagement groove 31 is used to guide and limit the baffle 20, ensuring the stability of the vertical sliding of the baffle 20. As a result, when the handle of the switch 11 is opened or closed, the first mounting groove 21 and the second mounting groove 22 can be accurately aligned with the wiring terminals of the switch 11.

[0020] The working principle of this utility model is as follows: The terminal fastening bolts used for wiring are located on the front wall of the switch 11. In order to achieve the standard operation of plugging and unplugging only when the power is off, when the handle of the switch 11 is raised to close the circuit, the handle will push the baffle 20 to move upward. As the baffle 20 moves upward, the first mounting groove 21 and the second mounting groove 22 are misaligned with the inlet and outlet terminals of the switch 11, respectively. At this time, it is impossible to loosen or remove the connected wires with a screwdriver, thereby achieving the purpose of not being able to connect wires when the circuit is closed. When the handle of the switch 11 is lowered to disconnect the power, the baffle 20 falls down, the first mounting groove 21 is aligned with the inlet terminal of the switch 11, and the second mounting groove 22 is aligned with the outlet terminal of the switch 11. The baffle 20 is guided by two parallel mounting rods 30. With the help of the limiting protrusions 24 on the front and rear walls of the baffle 20, it slides in the corresponding sliding channel 32. The anti-detachment groove 31 is used to guide and limit the baffle 20, ensuring the stability of the vertical sliding of the baffle 20. The baffle 20 is made of VO-grade flame retardant, high-strength engineering plastic (such as reinforced nylon PA66 or polycarbonate PC) in one injection molding. Its insulation resistivity is greater than 100MΩ and it can withstand the dielectric strength test of AC 2500V / min to ensure its safety and reliability in long-term use in electrical environment. The center distance L1 between the first mounting groove 21 and the second mounting groove 22 is equal to the center distance between the incoming and outgoing terminals of the target switch 11. The vertical length H of the clearance groove 23 is greater than the rotation stroke of the switch handle, and its lowest point position ensures that the mounting groove can be accurately aligned with the terminal in the open state.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A safety power-off device, characterized in that, include: An electrical box (10) has several switches (11) installed on its inner wall. A shielding structure is installed on the inner wall of the electrical box (10) to shield the terminals of the switch (11). The shielding structure includes a baffle (20), a first mounting groove (21), a second mounting groove (22), and a clearance groove (23). The baffle (20) is slidably installed in front of the switch (11). The front wall of the baffle (20) is provided with the first mounting groove (21), the second mounting groove (22), and the clearance groove (23). The handle of the switch (11) passes through the clearance groove (23). When the clearance groove (23) is closed, the first mounting groove (21) and the second mounting groove (22) are misaligned with the incoming and outgoing terminals of the switch (11).

2. The safety power-off device according to claim 1, characterized in that: The baffle (20) is a rectangular plate with a cross-sectional dimension larger than that of the switch (11). The first mounting groove (21) and the second mounting groove (22) are rectangular grooves of equal size. The height of the baffle (20) is greater than the rotation stroke of the handle of the switch (11). The handle does not interfere with the switch (11).

3. The safety power-off device according to claim 1, characterized in that: The shielding structure also includes mounting rods (30). A mounting rod (30) is provided on each side of the baffle (20). The mounting rods (30) are locked and fixed to the electrical box (10) by bolts. The baffle (20) can slide vertically along the mounting rods (30).

4. The safety power-off device according to claim 3, characterized in that: The protective structure also includes an anti-detachment groove (31), the mounting rod (30) forms an L-shaped folded rod, the vertical part of the mounting rod (30) is provided with an anti-detachment groove (31), and the baffle (20) is located in the anti-detachment groove (31).

5. The safety power-off device according to claim 4, characterized in that: The anti-detachment groove (31) is a rectangular groove, and the baffle (20) is fitted with the anti-detachment groove (31) with a clearance. Two parallel mounting rods (30) together limit and guide the baffle (20).

6. The safety power-off device according to claim 4, characterized in that: The shielding structure also includes a limiting protrusion (24) and a sliding channel (32). The inner wall of the mounting rod (30) is provided with an anti-detachment groove (31). The limiting protrusion (24) is fixedly connected to the baffle (20). The limiting protrusion (24) is slidably disposed in the sliding channel (32).

7. The safety power-off device according to claim 6, characterized in that: The sliding channel (32) is a rectangular groove. The side length of the sliding channel (32) is less than the length of the mounting rod (30). The limiting protrusion (24) forms a rectangular block that is clearance-fitted with the sliding channel (32). The front and rear walls of the baffle (20) are provided with the same limiting protrusion (24). The inner front and inner rear walls of the mounting rod (30) are provided with the same sliding channel (32).

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