Secondary overvoltage protection device

Abstract

The utility model discloses a secondary overvoltage protection device which comprises a box body, the front and back surfaces of the box body are both provided with line banks, the top of each line bank is provided with two symmetrical limiting strips, the limiting strips are fixedly connected with the box body, one side, far away from the box body, of each line bank is fixedly connected with two symmetrical first connecting plates, and the two symmetrical first connecting plates are fixedly connected with the box body. Two symmetrical clamping grooves are formed in the surface of the first connecting plate. According to the utility model, the sliding blocks are pushed to enable the clamping grooves to extrude the clamping blocks, so that the two clamping blocks move oppositely, at the moment, the spring is extruded to contract, and when the clamping blocks pass through the clamping grooves, the spring pushes the two clamping blocks to deviate from each other, so that the clamping blocks are clamped with the clamping grooves, and the wiring terminal strip can be fixed through the fixing structure; the replacement of the wiring terminal strip on the surface of the secondary overvoltage protector is prevented from consuming much time, and the disassembly and assembly efficiency of the wiring terminal strip is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of secondary overvoltage protection devices, in particular to a secondary overvoltage protection device. Background Art

[0002] In power systems, it is usually necessary to install a secondary overvoltage alarm protector to protect the system and the electrical equipment in the system. The surface of the secondary overvoltage protector is also fixed with a terminal block by bolts, which is used to fix the secondary overvoltage protector to the two ends of the CT secondary winding. During normal operation, the leakage current is extremely small and presents a high-resistance state. When the CT secondary circuit is open or the primary winding has an abnormal overcurrent, the overvoltage generated by the secondary winding causes the protector to quickly operate and short-circuit the CT secondary side. The fault location is automatically displayed on the panel, and a passive contact signal is output.

[0003] At present, most circuit systems are equipped with secondary overvoltage protectors to protect electrical equipment. When the secondary overvoltage protector is in use, the terminal block on its surface may be damaged. In this case, the terminal block on its surface needs to be disassembled and replaced. When the terminal block on the surface of the secondary overvoltage protector is replaced, the current needs to be disconnected. In order to reduce the time of current disconnection, a secondary overvoltage protection device is needed. The terminal block can be fixed by a fixed structure, so as to avoid the need to spend more time on the replacement of the terminal block on the surface of the secondary overvoltage protector and improve the efficiency of the disassembly and assembly of the terminal block. Utility Model Content

[0004] The purpose of the utility model is to provide a secondary overvoltage protection device, which has the function of fixing the terminal block through a fixing structure, avoiding the need to spend a lot of time on replacing the terminal block on the surface of the secondary overvoltage protector, and improving the efficiency of disassembly and assembly of the terminal block, so as to solve the above-mentioned background technical problems.

[0005] The top and bottom ends of the support frame are provided with a toothed connection of the support frame, and the toothed connection of the support frame is connected with the toothed connection of the support frame to form a toothed connection.

[0006] Preferably, a shift plate is fixedly connected to a side of the slider away from the box body, the shift plate is rectangular, and anti-slip grooves are provided on the surface of the shift plate.

[0007] Preferably, the top and bottom of the inner cavity of the card slot are fixedly connected with a baffle, the baffle is semi-cylindrical, and the opposite sides of the two card blocks are both inclined surfaces.

[0008] Preferably, both sides of the box body are fixedly connected with a second connecting plate, and the top of the second connecting plate is provided with two symmetrical mounting holes.

[0009] Preferably, the wiring block is fitted with the box body, the limiting strip is fitted with the top of the wiring block, and the slide is U-shaped.

[0010] Preferably, heat dissipation openings are provided on both sides of the box body, the right side of the slide is parallel to the connecting plate, and the groove is adapted to the card block.

[0011] The beneficial effects of the utility model are:

[0012] 1. The utility model pushes the slider to squeeze the card slot against the card block, so that the two card blocks move toward each other. At this time, the spring will be squeezed and contracted. When the card block passes through the card slot, the spring will push the two card blocks away from each other, so that the card block and the card slot are engaged. This can achieve the purpose of fixing the terminal block through the fixed structure, avoiding the need to consume a lot of time to replace the terminal block on the surface of the secondary overvoltage protector, and improving the efficiency of disassembly and assembly of the terminal block;

[0013] 2. The utility model sets a baffle, and when the card slot squeezes the card block, the baffle will fit on the inclined surface of the card block surface, reducing the friction between the inclined surface of the card block surface and the corners of the card slot, avoiding the card block from getting stuck with the surface of the card slot, and improving the smoothness of the card slot squeezing the card block. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] in:

[0015] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the utility model;

[0016] Figure 2 This is a three-dimensional disassembled schematic diagram of an embodiment of the utility model;

[0017] Figure 3 This is a front view schematic diagram of an embodiment of the utility model;

[0018] Figure 4 This is an embodiment of the utility model Figure 2 A partial enlarged view of point A.

[0019] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0020] 1. Box body, 2. Terminal block, 3. Limiting bar, 4. Connecting plate 1, 5. Slot, 6. Slide, 7. Slider, 8. Limiting block, 9. Limiting slot, 10. Groove, 11. Block, 12. Slide bar, 13. Spring, 14. Switch plate, 15. Stop bar, 16. Connecting plate 2. DETAILED DESCRIPTION

[0021] Hereinafter, embodiments of the secondary overvoltage protection device of the present invention will be described with reference to the accompanying drawings.

[0022] Example 1:

[0023] Figure 1-4The secondary overvoltage protection device of an embodiment of the present invention is shown, which includes a box body 1, both sides of the box body 1 are fixedly connected with a connecting plate 2 16, and the top of the connecting plate 2 16 is provided with two symmetrical mounting holes, the front and back sides of the box body 1 are provided with a terminal block 2, and the top of the terminal block 2 is provided with two symmetrical limit bars 3, the limit bar 3 is fixedly connected to the box body 1, and the side of the terminal block 2 away from the box body 1 is fixedly connected with two symmetrical connecting plates 1 4, and the surface of the connecting plate 1 4 is provided with two symmetrical card grooves 5, and the top and bottom of the inner cavity of the card groove 5 are fixedly connected with a baffle 15, the baffle 15 is semi-cylindrical, and the opposite sides of the two card blocks 11 are both inclined. Through the setting of the baffle 15, when the card slot 5 squeezes the card block 11, the baffle 15 will fit on the inclined surface of the card block 11 surface, reducing the friction between the inclined surface of the card block 11 surface and the corner of the card slot 5, avoiding the card block 11 and the surface of the card slot 5 from getting stuck, and improving The top and bottom of the slider 7 are fixedly connected to the limit block 8, and the top and bottom of the slider 6 are provided with a limit groove 9, and the limit block 8 is adapted to the limit groove 9. The opposite side of the two sliders 7 is provided with two symmetrical grooves 10, and the inner cavity of the groove 10 is slidably connected with a card block 11, which is engaged with the slot 5. The inner cavity of the groove 10 is fixedly connected with two symmetrical slide rods 12, which penetrate the card block 11 and are slidably connected to the card block 11. The surface of the slide rod 12 is provided with a spring 13, one end of the spring 13 is fixedly connected to the card block 11, and the other end of the spring 13 is fixedly connected to the inner wall of the groove 10.

[0024] Example 2:

[0025] Figure 1-4A secondary overvoltage protection device according to an embodiment of the present invention is shown, which includes a box body 1. Both sides of the box body 1 are provided with heat dissipation ports. The right side of the slide 6 is parallel to the connecting plate 1-4. The groove 10 is adapted to the card block 11. The front and back of the box body 1 are provided with terminal blocks 2. The terminal blocks 2 are fitted with the box body 1. The limit strips 3 are fitted with the top of the terminal blocks 2. The slide 6 is U-shaped. Two symmetrical limit strips 3 are provided on the top of the terminal blocks 2. The limit strips 3 are fixedly connected to the box body 1. The side of the terminal block 2 away from the box body 1 is fixedly connected to two symmetrical connecting plates 1-4. Two symmetrical card slots 5 are provided on the surface of the connecting plate 1-4. The front and back of the box body 1 are fixedly connected to two A symmetrical slide 6, the inner cavity of the slide 6 is slidably connected with a slider 7, the top and bottom of the slider 7 are fixedly connected to the limit block 8, the top and bottom of the slide 6 are provided with a limit groove 9, the limit block 8 is adapted to the limit groove 9, and two symmetrical grooves 10 are provided on the opposite side of the two slides 7. The inner cavity of the groove 10 is slidably connected with a card block 11, the card block 11 is engaged with the card slot 5, and the inner cavity of the groove 10 is fixedly connected with two symmetrical sliding rods 12, the sliding rod 12 passes through the card block 11 and is slidably connected to the card block 11, and the surface of the sliding rod 12 is provided with a spring 13, one end of the spring 13 is fixedly connected to the card block 11, and the other end of the spring 13 is fixedly connected to the inner wall of the groove 10.

[0026] Working principle: When using the present invention, the user places the terminal block 2 on the front and back of the box body 1 so that the limit strip 3 fits on the top of the terminal block 2, and pushes the slider 7 to make the card block 11 enter the inner cavity of the card slot 5. At this time, the card slot 5 will squeeze the card block 11, so that the two card blocks 11 move in opposite directions. At this time, the spring 13 will be squeezed and contracted. When passing through the card slot 5, the spring 13 will stretch, so that the two card blocks 11 move away from each other. At this time, the card block 11 will engage with the card slot 5, completing the installation of the terminal block 2, avoiding the need to spend more time on replacing the surface terminal block of the secondary overvoltage protector, and improving the efficiency of disassembly and assembly of the terminal block.

[0027] To sum up: the secondary overvoltage protection device pushes the slider 7 to make the slot 5 squeeze the block 11, so that the two blocks 11 move in opposite directions. At this time, the spring 13 will be squeezed and contracted. When the block 11 passes through the slot 5, the spring 13 will push the two blocks 11 away from each other, so that the block 11 is engaged with the slot 5, so that the terminal block can be fixed by the fixed structure, avoiding the need to spend more time on replacing the terminal block on the surface of the secondary overvoltage protector, and improving the efficiency of disassembly and assembly of the terminal block.

Claims

1. A secondary overvoltage protection device, characterized in that: The invention comprises a box body (1): a wiring block (2) is provided on the front and back of the box body (1); two symmetrical limit bars (3) are provided on the top of the wiring block (2); the limit bars (3) are fixedly connected to the box body (1); two symmetrical connecting plates (4) are fixedly connected on the side of the wiring block (2) away from the box body (1); two symmetrical card slots (5) are provided on the surface of the connecting plate (4); two symmetrical slides (6) are fixedly connected on the front and back of the box body (1); a slider (7) is slidably connected to the inner cavity of the slider (6); the top and bottom of the slider (7) are fixedly connected to the limit block (8); the top and bottom of the slider (6) are fixedly connected to the limit block (8); A limiting groove (9) is provided on each of the two sliders (7), and the limiting block (8) is adapted to the limiting groove (9). Two symmetrical grooves (10) are provided on opposite sides of the two sliders (7). The inner cavity of the groove (10) is slidably connected with a clamping block (11), and the clamping block (11) is engaged with the clamping groove (5). The inner cavity of the groove (10) is fixedly connected with two symmetrical sliding rods (12). The sliding rod (12) passes through the clamping block (11) and is slidably connected with the clamping block (11). A spring (13) is sleeved on the surface of the sliding rod (12), and one end of the spring (13) is fixedly connected to the clamping block (11), and the other end of the spring (13) is fixedly connected to the inner wall of the groove (10).

2. A secondary overvoltage protection device according to claim 1, characterized in that: A shift plate (14) is fixedly connected to the side of the slider (7) away from the box body (1); the shift plate (14) is rectangular, and the surface of the shift plate (14) is provided with anti-slip grooves.

3. A secondary overvoltage protection device according to claim 2, characterized in that: The top and bottom of the inner cavity of the card slot (5) are fixedly connected with a blocking bar (15), the blocking bar (15) is semi-cylindrical, and the opposite sides of the two card blocks (11) are both inclined surfaces.

4. A secondary overvoltage protection device according to claim 3, characterized in that: Both sides of the box body (1) are fixedly connected with a second connecting plate (16), and the top of the second connecting plate (16) is provided with two symmetrical mounting holes.

5. A secondary overvoltage protection device according to claim 4, characterized in that: The wiring block (2) is fitted with the box body (1), the limiting strip (3) is fitted with the top of the wiring block (2), and the slide (6) is U-shaped.

6. A secondary overvoltage protection device according to claim 5, characterized in that: Both sides of the box body (1) are provided with heat dissipation openings, the right side of the slide (6) is parallel to the connecting plate (4), and the groove (10) is adapted to the clamping block (11).

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