Fireproof device of drop-out fuse

Abstract

The utility model belongs to the technical field of electric power operation and maintenance, and discloses a fireproof device for a drop-out fuse, which comprises a fuse body, a fusion tube is mounted at one end of the fuse body, a fuse body is arranged in the fusion tube, and a fireproof cover is sleeved outside the fuse body. Through cooperation of a fireproof cover, a rotating disc, a clamping plate, an inclined block and other structures, sparks can be extinguished in the device conveniently, combustion of nearby inflammables caused by scattering of the sparks is avoided, through clamping of a fuse body, the fuse body is prevented from being attached to the inner wall of the fireproof cover, the fireproof effect is prevented from being affected, and the service life of the fuse body is prolonged. The surface of the fireproof cover is provided with micro meshes, so that sparks are intercepted under the condition that high-pressure gas discharge is not affected, the interior of the fireproof cover is coated with a fireproof material, so that the sparks can be extinguished in the fireproof cover conveniently, the sparks are prevented from falling onto inflammables, and the safety of the fuse body is improved.

Description

Technical Field

[0001] This utility model belongs to the field of power operation and maintenance technology, specifically a fireproof device for drop-out switches. Background Technology

[0002] In 10kV distribution line branches and distribution transformers, a commonly used short-circuit protection switch is the drop-out fuse. Its advantages are that it can adapt well to the outdoor environment, is easy to operate, and is economical. Therefore, it is widely used in 10kV distribution lines for equipment switching operations.

[0003] Existing drop-out fuses mainly consist of a fuse wire, fuse tube, contacts, auxiliary spring, and deformable post. When interrupting fault current, drop-out fuses may cause an electric arc under short-circuit or overload conditions, generating high temperatures and electromagnetic fields. If the drop-out switch is of poor quality, the generated arc may not be extinguished quickly, causing the internal materials of the fuse to burn and forming sparks. If these sparks fall onto nearby flammable materials, they can cause a fire, endangering nearby people and property. Therefore, a fireproof device for drop-out switches is proposed to solve the problems mentioned in the background technology. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a fireproof device for drop switches, which has the advantage of facilitating the extinguishing of sparks inside the device, thereby preventing sparks from scattering and causing nearby flammable materials to ignite.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fireproof device for a drop switch, comprising a fuse body, a fuse tube installed at one end of the fuse body, a fuse wire body disposed inside the fuse tube, a fireproof cover fitted over the fuse wire body, micro-mesh openings on the surface of the fireproof cover, a base fixedly connected to the bottom of the fireproof cover, a turntable movably connected inside the base, a guide groove circumferentially formed at 90 degrees on the surface of the turntable, a square block movably connected circumferentially at 90 degrees inside the base, a clamping plate fixedly connected to one end of the square block, and an inclined block circumferentially formed at 180 degrees on the top of the base, with a second spring fixedly connected to opposite sides of the two inclined blocks.

[0006] Preferably, a fuse pressure plate is installed on the outside of the bottom end of the fuse body, and a through hole is opened in the middle of both the fireproof cover and the base.

[0007] Preferably, the inner wall of the fireproof cover is coated with a special fireproof coating, and the fireproof cover is cone-shaped.

[0008] Preferably, the bottom of the square block is provided with a protrusion, which is movably engaged inside the guide groove. When the turntable rotates, it causes the protrusion on the square block to slide along the trajectory of the guide groove.

[0009] Preferably, the inner wall of the base is provided with a straight groove at a 90-degree angle, which is used to circumferentially limit the protrusions on the square block when the turntable rotates.

[0010] Preferably, a pull rod is movably connected to the bottom of the base, and the top end of the pull rod is fixedly connected to the bottom end of one of the square blocks.

[0011] Preferably, the tops of the two inclined blocks on opposite sides are both inclined, and the surface of the base is provided with a groove for limiting the inclined blocks.

[0012] Preferably, the end of the second spring away from the inclined block is fixedly connected to the outer wall of the fireproof cover, and the second spring is used to squeeze the inclined block and make the two inclined blocks maintain the tendency to move in opposite directions.

[0013] Preferably, the clamping plate is arc-shaped and made of high-temperature resistant plastic material. In the initial state, all four clamping plates are in contact with the outer wall of the fuse body.

[0014] Preferably, a first spring is fixedly connected to the end of the square block away from the clamping plate, and the square block is elastically connected to the base through the first spring.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention utilizes the cooperation of structures such as a fireproof cover, a turntable, a clamping plate, and an inclined block to facilitate the extinguishing of sparks inside the device, thereby preventing sparks from scattering and igniting nearby flammable materials. The clamping plate design facilitates the clamping of the fuse body, ensuring that the fuse body is centered in the fireproof cover and preventing it from adhering to the inner wall of the fireproof cover, which would affect the fireproof effect. The surface of the fireproof cover has micro-mesh holes, which intercept sparks without affecting the discharge of high-pressure gas. The interior of the fireproof cover is coated with fire-retardant material, which facilitates the extinguishing of sparks inside the fireproof cover, thereby preventing them from falling onto flammable materials and improving the safety of the fuse body. Attached Figure Description

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

[0018] Figure 2 This is a schematic diagram of the structure of the fireproof cover of this utility model;

[0019] Figure 3 This is a schematic diagram of the front section of the fireproof cover of this utility model;

[0020] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 This is a schematic diagram showing the positional relationship between the turntable, square block, clamping plate, and first spring piece of this utility model.

[0022] In the diagram: 1. Fuse body; 101. Fuse tube; 102. Fuse wire body; 103. Fuse wire pressure plate; 2. Fireproof cover; 3. Micro mesh; 4. Base; 5. Turntable; 6. Guide groove; 7. Square block; 8. Clamping plate; 9. First spring; 10. Pull rod; 11. Inclined block; 12. Second spring; 13. Straight slot. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1 to 5 As shown, this utility model provides a fireproof device for a drop switch, including a fuse body 1, a fuse tube 101 installed at one end of the fuse body 1, a fuse wire body 102 disposed inside the fuse tube 101, a fireproof cover 2 sleeved on the outside of the fuse wire body 102, micro mesh holes 3 opened on the surface of the fireproof cover 2, a base 4 fixedly connected to the bottom of the fireproof cover 2, a turntable 5 movably connected inside the base 4, a guide groove 6 circumferentially formed at 90 degrees on the surface of the turntable 5, a square block 7 movably connected circumferentially at 90 degrees inside the base 4, a clamping plate 8 fixedly connected to one end of the square block 7, and an inclined block 11 circumferentially formed at 180 degrees on the top of the base 4, with a second spring piece 12 fixedly connected to opposite sides of the two inclined blocks 11.

[0025] The above solution employs the following: the clamping plate 8 is designed to easily clamp the fuse body 102, thereby ensuring that the fuse body 102 is located in the center of the fireproof cover 2, preventing the fuse body 102 from sticking to the inner wall of the fireproof cover 2 and affecting the fireproof effect. The surface of the fireproof cover 2 is provided with micro-mesh 3, which intercepts sparks without affecting the discharge of high-pressure gas. The interior of the fireproof cover 2 is coated with fire-retardant material, which facilitates the extinguishing of sparks inside the fireproof cover 2, thereby preventing them from falling onto flammable materials and improving the safety of the fuse body 1.

[0026] like Figures 2 to 5As shown, a fuse pressure plate 103 is installed on the outside of the bottom end of the fuse body 102. The fireproof cover 2 and the base 4 are both provided with through holes in the middle. The inner wall of the fireproof cover 2 is coated with a special fireproof coating. The fireproof cover 2 is conical in shape. The bottom of the square block 7 is provided with a protrusion. The protrusion is movably engaged in the inside of the guide groove 6. When the turntable 5 rotates, it drives the protrusion on the square block 7 to slide along the trajectory of the guide groove 6. The inner wall of the base 4 is provided with a straight groove 13 at a 90-degree angle. The straight groove 13 is used to circumferentially limit the protrusion on the square block 7 when the turntable 5 rotates.

[0027] The above solution is adopted: the fireproof cover 2 is cone-shaped. The purpose of the cone shape is that when installing the fireproof cover 2, it can better adapt to the different sizes of the fusion tube 101. The gradually narrowing shape of the top of the fireproof cover 2 can reduce the space occupied above, thus making the installation more flexible.

[0028] like Figures 2 to 5 As shown, a pull rod 10 is movably connected to the bottom of the base 4. The top of the pull rod 10 is fixedly connected to the bottom of one of the square blocks 7. The tops of the two inclined blocks 11 on opposite sides are both inclined. The surface of the base 4 is provided with a sliding groove for limiting the inclined blocks 11. The end of the second spring piece 12 away from the inclined blocks 11 is fixedly connected to the outer wall of the fireproof cover 2. The second spring piece 12 is used to squeeze the inclined blocks 11 and make the two inclined blocks 11 maintain the tendency to move in opposite directions.

[0029] The above solution is adopted: the design of the second spring 12 is such that after the fireproof cover 2 enters the inside of the molten tube 101, the second spring 12 will automatically adjust the opening degree according to the inner diameter of the molten tube 101, thereby driving the inclined block 11 to abut against the inner wall of the molten tube 101, thereby achieving the effect of fixing the fireproof cover 2. Therefore, through the design of the second spring 12, it is possible to fix the fireproof cover 2 inside the molten tube 101 of different diameters within a certain range.

[0030] like Figures 2 to 5 As shown, the clamping plate 8 is arc-shaped and made of high-temperature resistant plastic material. In the initial state, all four clamping plates 8 are in contact with the outer wall of the fuse body 102. The square block 7 is fixedly connected to the first spring piece 9 at the end away from the clamping plate 8. The square block 7 is elastically connected to the base 4 through the first spring piece 9.

[0031] The above solution involves clamping the fuse body 102 against the outer wall of the clamping plate 8. The clamping plate 8 clamps the fuse body 102, ensuring that the fuse body 102 is always located in the center of the fireproof cover 2. When a fault current occurs in the circuit and causes the fuse body 102 to melt, an electric arc and high temperature will be generated. If the fuse body 102 is in contact with the inner wall of the fireproof cover 2, the electric arc may damage the inner wall of the fireproof cover 2, thereby affecting the fireproof effect.

[0032] The working principle and usage process of this utility model are as follows: First, the operator pulls the lever 10 away from the fireproof cover 2, causing the lever 10 to move one of the square blocks 7. As one square block 7 moves, its protrusions slide along the guide groove 6, causing the turntable 5 to rotate. This causes the protrusions on the other three square blocks 7 to slide along the guide groove 6, thereby causing the four clamping plates 8 to unfold. When the protrusions abut against the inner wall of the guide groove 6, the operator... Personnel can easily insert the fuse body 102 into the fireproof cover 2 through the through holes in the middle of the fireproof cover 2 and the base 4. Then, the operator releases the pull rod 10, so that the square block 7 drives the clamping plate 8 to reset under the action of the first spring 9, thereby making all four clamping plates 8 abut against the outer wall of the fuse body 102, thus effectively clamping the fuse body 102, and keeping the fuse body 102 always in the middle of the fireproof cover 2, thereby preventing the fuse body 102 from sticking to the inner wall of the fireproof cover 2 during vibration.

[0033] Subsequently, the operator inserts the fireproof cover 2, which is fitted outside the fuse body 102, into the bottom of the molten tube 101. As the fireproof cover 2 enters the molten tube 101, it causes the inclined surface of the wedge block 11 to come into contact with the outer wall of the molten tube 101, thereby squeezing the two wedge blocks 11 to move towards each other. When the top of the base 4 comes into contact with the bottom of the molten tube 101, the fireproof cover 2 is completely inside the molten tube 101. Then, under the action of the elastic force of the second spring 12, the two wedge blocks 11 move in opposite directions until the plane of the wedge block 11 comes into contact with the inner wall of the fireproof cover 2, thereby supporting and limiting the position of the fireproof cover 2, and finally completing the operation.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drop-out fuse fireproof device, comprising a fuse body (1), characterized in that: A fuse tube (101) is installed at one end of the fuse body (1). A fuse wire body (102) is provided inside the fuse tube (101). A fireproof cover (2) is fitted on the outside of the fuse wire body (102). A micro mesh (3) is opened on the surface of the fireproof cover (2). A base (4) is fixedly connected to the bottom of the fireproof cover (2). A turntable (5) is movably connected inside the base (4). A guide groove (6) is opened at a 90-degree angle on the surface of the turntable (5). A square block (7) is movably connected at a 90-degree angle on the inside of the base (4). A clamping plate (8) is fixedly connected to one end of the square block (7). An inclined block (11) is set at a 180-degree angle on the top of the base (4). A second spring piece (12) is fixedly connected to the opposite side of the two inclined blocks (11).

2. The fireproof device for drop-out fuses according to claim 1, characterized in that: A fuse pressure plate (103) is installed on the outside of the bottom end of the fuse body (102), and a through hole is opened in the middle of the fireproof cover (2) and the base (4).

3. The fireproof device for drop-out fuses according to claim 1, characterized in that: The fireproof cover (2) is cone-shaped.

4. The fireproof device for drop-out fuses according to claim 1, characterized in that: The bottom of the square block (7) is provided with a protrusion, which is movably engaged inside the guide groove (6). When the turntable (5) rotates, it drives the protrusion on the square block (7) to slide along the trajectory of the guide groove (6).

5. The fireproof device for drop-out fuses according to claim 1, characterized in that: The inner wall of the base (4) is provided with a straight groove (13) at a 90-degree angle. The straight groove (13) is used to circumferentially limit the protrusion on the square block (7) when the turntable (5) rotates.

6. The fireproof device for drop-out fuses according to claim 1, characterized in that: The bottom of the base (4) is movably connected to a pull rod (10), and the top of the pull rod (10) is fixedly connected to the bottom of one of the square blocks (7).

7. The fireproof device for drop-out fuses according to claim 1, characterized in that: The tops of the two inclined blocks (11) on opposite sides are both inclined, and the surface of the base (4) is provided with a groove for limiting the inclined blocks (11).

8. The fireproof device for drop-out fuses according to claim 1, characterized in that: The end of the second spring (12) away from the inclined block (11) is fixedly connected to the outer wall of the fireproof cover (2). The second spring (12) is used to squeeze the inclined block (11) and make the two inclined blocks (11) maintain the tendency to move in opposite directions.

9. The fireproof device for drop-out fuses according to claim 1, characterized in that: The clamping plate (8) is arc-shaped and made of high-temperature resistant plastic material. In the initial state, all four clamping plates (8) are in contact with the outer wall of the fuse body (102).

10. The fireproof device for drop-out fuses according to claim 1, characterized in that: The square block (7) is fixedly connected to a first spring piece (9) at one end away from the clamping plate (8), and the square block (7) is elastically connected to the base (4) through the first spring piece (9).

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