Modular drop-out fuse

Abstract

This utility model relates to the field of power equipment technology and discloses a modular drop-out fuse, including an insulating support. Both the upper and lower ends of the insulating support are equipped with buffer mechanisms. Insulating sheets are fixedly connected at equal intervals to the upper and lower sides of the insulating support. A drop-out mechanism is provided at the bottom of the buffer mechanism. Wiring assemblies are provided on both the upper and lower sides of the buffer mechanism. A rainproof assembly is provided on the right side of the buffer mechanism. A disassembly and assembly mechanism is provided inside the rainproof assembly to maintain the stability of the device. The buffer mechanism includes two stationary contacts. In this utility model, when a circuit fault causes the fuse to blow, the fuse tube falls and, driven by a metal clamp, the ejector plate rotates around the trunnion sleeve, achieving a smooth drop. The fuse tube falls under gravity, and the damper of the buffer mechanism provides damping to slow down the speed, while the spring absorbs the impact force, preventing damage to the fuse tube due to rapid descent.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, and in particular to a modular drop-out fuse. Background Technology

[0002] The function of a fuse is to cut off the circuit by melting its own fusible element when an overload or short circuit fault occurs. This action can quickly prevent excessive current from causing further damage to various electrical equipment in the circuit, thereby ensuring the safe and stable operation of the power system, avoiding the consequences of equipment damage caused by circuit faults, ensuring the reliability of power supply, and enabling electrical equipment to work normally.

[0003] Modular drop-out fuses are innovative power protection devices developed from traditional fuses. They design each functional part of the fuse as an independent module. This modular design facilitates manufacturing and maintenance, and improves the versatility and interchangeability of the fuse. In practical applications, when a module fails, it is not necessary to replace the entire fuse; only the corresponding faulty module needs to be replaced, effectively shortening maintenance time and improving the operating efficiency of the power system. At the same time, the drop-out design ensures that after the fuse element melts, its fusible element will automatically drop, forming a clear disconnection gap, which makes it easy for maintenance personnel to intuitively judge the fault status.

[0004] In traditional fuses, the heat generated by the current passing through the fusible element during operation is transferred to the fuse carrier. However, the small heat dissipation area and poor heat dissipation path of the fuse carrier lead to excessively high temperatures, affecting the normal fusing characteristics of the fusible element. Current technologies use heat dissipation fins made of high thermal conductivity materials in the fuse carrier to increase the heat dissipation area and ensure the normal fusing characteristics of the fusible element. However, in actual use, the fuse carrier is directly dropped freely under the action of gravity at high speed, which generates a large impact force. Long-term use can cause cracks and deformation damage to the fuse carrier, affecting the normal use and service life of the fuse. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a modular drop-out fuse, which aims to improve the problem in the prior art where the fusible component falls freely under gravity, affecting the normal use and service life of the fuse.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a modular drop-out fuse, comprising an insulating support, a buffer mechanism provided at both the upper and lower ends of the insulating support, insulating sheets fixedly connected at equal intervals on both the upper and lower sides of the insulating support, a drop-out mechanism provided at the bottom of the buffer mechanism, wiring assemblies provided on both the upper and lower sides of the buffer mechanism, a rainproof assembly provided on the right side of the buffer mechanism, and a disassembly and assembly mechanism provided inside the rainproof assembly, the disassembly and assembly mechanism being used to maintain the stability of the device;

[0007] The buffer mechanism includes two stationary contacts. The adjacent sides of the two stationary contacts are fixedly connected to the upper and lower sides of the insulating support, respectively. The front and rear sides of the lower stationary contact are fixedly connected to connecting shafts. The outer walls of the two connecting shafts are rotatably connected to movable rings. The tops of the two movable rings are fixedly connected to operating rods. The tops of the two operating rods are fixedly connected to dampers. The outer walls of the two dampers are slidably connected to springs. The tops of the two springs and the two dampers are fixedly connected to corresponding collars. The inner walls of the two collars are rotatably connected to fixed shafts. The adjacent ends of the two fixed shafts are fixedly connected to the same fuse tube.

[0008] As a further description of the above technical solution:

[0009] The drop mechanism includes a moving contact, the top of which is fixedly connected to the bottom of the lower stationary contact. A trunnion sleeve is rotatably connected to the inner wall of the moving contact. A pop-out plate is fixedly connected to the top right side of the trunnion sleeve. A metal hoop is rotatably connected to the top right side of the pop-out plate. The top of the metal hoop is fixedly connected to the bottom end of the fuse tube.

[0010] As a further description of the above technical solution:

[0011] The wiring assembly includes two screws, which are threaded to the inner wall of the corresponding stationary contact. Both screws have nuts threaded to their outer walls. The upper screw has an upper terminal threaded to the middle of its outer wall, and the lower screw has a lower terminal threaded to the middle of its outer wall.

[0012] As a further description of the above technical solution:

[0013] The rain-shielding assembly includes a rain-shielding plate, the bottom of which is fixedly connected to the top of the upper stationary contact. A duckbill plate is fixedly connected to the right side of the inner wall of the rain-shielding plate, and a connecting buckle is fixedly connected to the left side of the inner wall of the rain-shielding plate.

[0014] As a further description of the above technical solution:

[0015] The disassembly and assembly mechanism includes a screw, the outer wall of which is threaded to the top of the rain shield, and a slider is threaded to the bottom of the outer wall of the screw. A groove is provided on the right side of the rain shield, and the inner wall of the groove is slidably connected to the outer wall of the slider. A top plate is fixedly connected to the bottom of the slider, and a spring is fixedly connected to the bottom of the top plate. A base is fixedly connected to the bottom of the spring, and the bottom of the base fits against the top of the duckbill. A positioning component is provided on the inner wall of the groove.

[0016] As a further description of the above technical solution:

[0017] The positioning component includes two springs, the outer walls of which are slidably connected to the front and rear sides of the inner wall of the slide groove, and a positioning ball is fixedly connected to each adjacent side of the two springs. The front and rear sides of the slider are provided with positioning grooves, and the inner walls of the two positioning grooves are slidably connected to the outer walls of the corresponding positioning balls.

[0018] As a further description of the above technical solution:

[0019] Each of the two connecting shafts has a limiting block fixedly connected to its opposite end, and the two limiting blocks are respectively fitted with the corresponding movable rotating ring.

[0020] As a further description of the above technical solution:

[0021] The outer wall of the upper screw two penetrates the inner wall of the rain shield, and the top of the rain shield is in contact with the bottom of the upper terminal.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, when the circuit fails and the fuse blows, the device is activated. The fuse tube falls and is driven by the metal hoop to rotate the ejector plate around the trunnion sleeve, achieving a smooth drop. The fuse tube falls under gravity, and the damper of the buffer mechanism provides damping to slow down the speed. The spring absorbs the impact force and prevents the fuse tube from being damaged due to rapid falling. At the same time, the wiring assembly adjusts the tightness of the connection between the wiring terminal and the stationary contact by rotating the nut, which stabilizes the circuit. The rain shield prevents rainwater from entering, extends the life of the device, and improves the overall reliability and stability of the fuse.

[0024] 2. In this utility model, the slider is inserted into the right groove of the rain shield. The spring on the inner wall of the groove pushes the positioning ball, which cooperates with the positioning groove of the slider. The positioning ball is inserted to achieve the initial positioning of the slider. Then, the screw is screwed in. Because the screw is threadedly connected to the slider, the slider slides down along the groove when rotating, which drives the top plate to descend and compress the second spring. When the base is in contact with the top of the duckbill, the screw is stopped and the second spring is compressed into place. This design enables convenient replacement of the spring through positioning and tightening. The spring can be replaced by reversing the operation, ensuring the stable operation of the fuse tube. Attached Figure Description

[0025] Figure 1 This is a perspective view of a modular drop-out fuse proposed in this utility model;

[0026] Figure 2 This is a front view of a modular drop-out fuse proposed in this utility model;

[0027] Figure 3 This is a schematic diagram of a rainproof assembly for a modular drop-out fuse proposed in this utility model;

[0028] Figure 4 This is a schematic diagram of the drop-out mechanism of a modular drop-out fuse proposed in this utility model;

[0029] Figure 5 This is a schematic diagram of the disassembly and assembly mechanism of a modular drop-out fuse proposed in this utility model.

[0030] Legend:

[0031] 1. Insulating support; 2. Buffer mechanism; 201. Stationary contact; 202. Connecting shaft; 203. Moving ring; 204. Operating lever; 205. Damper; 206. Spring 1; 207. Collar; 208. Fixed shaft; 209. Fuse tube; 3. Assembly / disassembly mechanism; 301. Screw 1; 302. Slide groove; 303. Sliding block; 304. Top plate; 305. Spring 2; 306. Base; 307. Positioning assembly; 3 071. Spring 3; 3072. Positioning ball; 3073. Positioning groove; 4. Insulating sheet; 5. Drop mechanism; 501. Moving contact; 502. Trunnion sleeve; 503. Pop-out plate; 504. Metal hoop; 6. Wiring assembly; 601. Screw 2; 602. Nut; 603. Upper terminal; 604. Lower terminal; 7. Rain shelter assembly; 701. Rain shelter plate; 702. Duckbill plate; 703. Connecting buckle; 8. Limit block. Detailed Implementation

[0032] 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.

[0033] Reference Figure 1 , Figure 3 and Figure 4This utility model provides an embodiment of a modular drop-out fuse, including an insulating support 1 that supports the entire fuse structure. Both the upper and lower ends of the insulating support 1 are equipped with buffer mechanisms 2, which buffer the falling fuse tube 209 after the fuse melts. Insulating sheets 4 are fixedly connected at equal intervals on both the upper and lower sides of the insulating support 1, enhancing the insulation performance between the fuse components. A drop-out mechanism 5 is provided at the bottom of the buffer mechanism 2, ensuring the fuse tube 209 falls smoothly when the fuse melts. Wiring assemblies 6 are provided on both the upper and lower sides of the buffer mechanism 2, providing a stable connection between the circuit and the fuse. A rainproof assembly 7 is provided on the right side of the buffer mechanism 2, preventing rain from entering the fuse tube. To prevent rainwater from entering the fuse and protect internal components, the rainproof assembly 7 has an internal disassembly and assembly mechanism 3. This mechanism maintains the stability of the device. The buffer mechanism 2 includes two stationary contacts 201. These contacts 201 connect to the circuit and provide mounting positions for other components. The adjacent sides of the two stationary contacts 201 are fixedly connected to the upper and lower sides of the insulating support 1, respectively. Connecting shafts 202 are fixedly connected to the front and rear sides of the lower stationary contact 201. These shafts 202 provide rotational support for the movable rotating rings 203. Movable rotating rings 203 are rotatably connected to the outer walls of both connecting shafts 202. These rings 203 can rotate on the connecting shafts 202 to drive related components. Operating levers 204 are fixedly connected to the tops of both movable rotating rings 203. Operating levers 204 are used to transmit force and realize the linkage of related components. Dampers 205 are fixedly connected to the top ends of both operating levers 204. Dampers 205 can slow down the falling speed of the fuse tube 209. Springs 206 are slidably connected to the outer walls of the two dampers 205. Springs 206 absorb part of the impact force through elastic deformation. Corresponding collars 207 are fixedly connected to the top ends of the two springs 206 and the two dampers 205. Collars 207 are used to connect to and slide along the fixed shaft 208. Fixed shafts 208 are rotatably connected to the inner walls of the two collars 207. Fixed shafts 208 provide support for the installation and rotation of the fuse tube 209. The same fuse tube 209 is fixedly connected to adjacent ends of the two fixed shafts 208. Fuse tube 209 contains a fuse that melts to protect the circuit in case of a fault. The drop mechanism 5 includes a moving contact 501, which works with the stationary contact 201 to switch the circuit on and off. The top of the moving contact 501 is fixedly connected to the bottom of the stationary contact 201. A trunnion sleeve 502 is rotatably connected to the inner wall of the moving contact 501, providing a pivot point for the ejector plate 503. The ejector plate 503 is fixedly connected to the top right side of the trunnion sleeve 502, assisting the fuse tube 209 in falling smoothly. A metal clamp 504 is rotatably connected to the top right side of the ejector plate 503, connecting the fuse tube 209 and the ejector plate 503. The top of the metal clamp 504 is fixedly connected to the bottom end of the fuse tube 209.Wiring assembly 6 includes two screws 601, which are used to fix the terminals and adjust the tightness of the connection. The two screws 601 are threaded onto the inner wall of the corresponding stationary contact 201. Nuts 602 are threaded onto the outer wall of each screw 601, and the nuts 602 cooperate with the screws 601 to achieve a tight fit. An upper terminal 603 is threaded onto the middle of the outer wall of the upper screw 601, which is used to connect the incoming line of an external circuit. A lower terminal 604 is threaded onto the middle of the outer wall of the lower screw 601, which is used to connect the outgoing line of an external circuit. Rainproof assembly 7 includes a rainproof plate 701, which prevents rainwater from entering the fuse. The bottom of the rainproof plate 701 is fixedly connected to the top of the upper stationary contact 201. A duckbill plate 702 is fixedly connected to the right side of the inner wall of the rainproof plate 701. The duckbill plate 702... For strong rain protection, a connecting buckle 703 is fixedly connected to the left side of the inner wall of the rain shield 701. The connecting buckle 703 can be used to connect and fix the rain shield assembly 7. After the fuse blows, the fuse tube 209 falls. The damper 205 of the buffer mechanism 2 and the spring 206 work together to buffer the impact of the falling fuse tube 209. After it stops falling, the collar 207 can be manually slid outward along the outer wall of the fixed shaft 208. It moves the moving ring 203 outward through a simple connecting component until the collar 207 is disengaged from the fixed shaft 208, making it easy to remove the fuse tube 209. Rotating the fuse tube 209 changes the angle between the metal clamp 504 and the pop-out plate 503, allowing the fuse tube 209 to be removed. During installation, the operation is reversed. First, connect the metal clamp 504 and the pop-out plate 503 to prepare for the installation of the fuse tube 209. Then, slide the inner collar 207 to fit it onto the fixed shaft 208 to complete the installation of the fuse tube 209.

[0034] Specifically, when the fuse blows, the fuse tube 209 tends to fall under the influence of gravity. At this time, the buffer mechanism 2 comes into play. The collar 207 connected to the fuse tube 209 is connected to the damper 205 and spring 206 via the fixed shaft 208. The damper 205 provides damping force to slow down the falling speed of the fuse tube 209, while the spring 206 absorbs part of the impact force through elastic deformation. The two work together to effectively buffer the fall of the fuse tube 209 and prevent it from being damaged by the large impact force generated by the rapid fall. During this process, the moving contact 501 is connected to the ejector via the trunnion sleeve 502. The plate 503 is connected, and the metal clamp 504 connects the ejector plate 503 to the bottom end of the fuse tube 209. When the fuse melts, the fuse tube 209 falls and drives the metal clamp 504, which in turn causes the ejector plate 503 to rotate around the trunnion sleeve 502, so that the fuse tube 209 can fall smoothly. The wiring assembly 6 is responsible for the circuit connection. By rotating the nut 602, the tightness of the connection between the upper terminal 603 and the lower terminal 604 and the stationary contact 201 can be adjusted to ensure that the circuit connection is stable. The rain shield 701 prevents rainwater from entering the fuse and protects the internal components from rainwater corrosion, thus extending the service life of the device.

[0035] Reference Figure 3 and Figure 5 The disassembly / assembly mechanism 3 includes a screw 301, the outer wall of which is threadedly connected to the top of the rain shield 701. A slider 303 is threadedly connected to the bottom of the outer wall of the screw 301. A groove 302 is provided on the right side of the rain shield 701, and the inner wall of the groove 302 is slidably connected to the outer wall of the slider 303. A top plate 304 is fixedly connected to the bottom of the slider 303. A spring 305 is fixedly connected to the bottom of the top plate 304. A base 306 is fixedly connected to the bottom of the spring 305. The part is attached to the top of the duckbill plate 702. The inner wall of the slide groove 302 is provided with a positioning component 307. The positioning component 307 includes two springs 3071. The outer walls of the two springs 3071 are slidably connected to the front and rear sides of the inner wall of the slide groove 302 respectively. A positioning ball 3072 is fixedly connected to each adjacent side of the two springs 3071. The front and rear sides of the slider 303 are provided with positioning grooves 3073. The inner walls of the two positioning grooves 3073 are slidably connected to the outer walls of the corresponding positioning balls 3072 respectively.

[0036] Specifically, when installing spring 305, slide block 303 is inserted into the groove 302 on the right side of rain shield 701. At this time, springs 3071 on the front and rear sides of the inner wall of groove 302 will push positioning ball 3072 inward. The positioning grooves 3073 on the front and rear sides of slide block 303 cooperate with positioning ball 3072. Under the elastic force of spring 3071, positioning ball 3072 automatically gets into positioning groove 3073, realizing the initial positioning of slide block 303 in groove 302. After positioning is completed, the screw 301 is tightened. Screw 301 is screwed into the top of rain shield 701. Screw 301 and slider 303 are connected by threads. As screw 301 rotates, slider 303 will gradually slide down along slide groove 302. During the sliding process, top plate 304 is fixedly connected to slider 303 and will also fall down, thereby compressing spring 305. When base 306 is tightly attached to the top of duck tongue plate 702, screw 301 is stopped from being tightened. At this time, spring 305 is in a compressed state, realizing the convenient replacement of spring 305 in disassembly and assembly mechanism 3. The spring can be replaced by positioning component 307 and screw 301 is tightened and fixed. The spring can be replaced by reversing the operation, ensuring the stability of fuse tube 209 during operation.

[0037] Reference Figure 1 , Figure 2 and Figure 4Limiting blocks 8 are fixedly connected to the opposite ends of the two connecting shafts 202. The limiting blocks 8 limit the excessive displacement and detachment of the moving ring 203. The two limiting blocks 8 are respectively engaged with the corresponding moving ring 203 to ensure that the moving ring 203 rotates within the specified range. The middle of the outer wall of the upper screw 601 penetrates the inner wall of the rain shield 701 to realize the connection between the wiring assembly 6 and the rain shield assembly 7. The top of the rain shield 701 is engaged with the bottom of the upper wiring terminal 603 to enhance the stability of the connection.

[0038] Specifically, the limiting block 8 serves to restrict the excessive displacement and detachment of the movable rotating ring 203, ensuring that the movable rotating ring 203 rotates within the specified range. The middle of the outer wall of the upper screw 601 penetrates the inner wall of the rain shield 701, realizing the connection between the wiring assembly 6 and the rain shield assembly 7, and enhancing the stability of the connection.

[0039] Working principle: When a circuit malfunctions and the fuse blows, the fuse tube 209 tends to fall under the influence of gravity. At this time, the buffer mechanism 2 comes into play. The collar 207 connected to the fuse tube 209 is connected to the damper 205 and spring 206 via the fixed shaft 208. The damper 205 provides damping force to slow down the falling speed of the fuse tube 209, while the spring 206 absorbs part of the impact force through elastic deformation. The two work together to effectively buffer the fall of the fuse tube 209 and prevent it from being damaged by the large impact force generated by the rapid fall. During this process, the moving contact 501 passes through the trunnion sleeve 50 2. Connected to the ejector plate 503, the metal clamp 504 connects the ejector plate 503 to the bottom end of the fuse tube 209. When the fuse melts, the fuse tube 209 falls and drives the metal clamp 504, which in turn causes the ejector plate 503 to rotate around the trunnion sleeve 502, so that the fuse tube 209 can fall smoothly. The wiring assembly 6 is responsible for the circuit connection. By rotating the nut 602, the tightness of the connection between the upper wiring terminal 603 and the lower wiring terminal 604 and the stationary contact 201 can be adjusted to ensure that the circuit connection is stable. The rain shield 701 prevents rainwater from entering the fuse and protects the internal components from rainwater corrosion, thus extending the service life of the device.

[0040] Furthermore, when installing spring 2 305, slide block 303 is inserted into the groove 302 on the right side of rain shield 701. At this time, spring 3 3071 on the front and rear sides of the inner wall of groove 302 will push positioning ball 3072 inward. The positioning groove 3073 on the front and rear sides of slide block 303 cooperates with positioning ball 3072. Under the elastic force of spring 3 3071, positioning ball 3072 automatically gets into positioning groove 3073, realizing the initial positioning of slide block 303 in groove 302. After positioning is completed, the tightening operation begins with screw 1 301. Screw 1 301 is screwed into the top of rain shield 701. Screw 301 and slider 303 are connected by threads. As screw 301 rotates, slider 303 will gradually slide down along slide groove 302. During the sliding process, top plate 304 is fixedly connected to slider 303 and will also fall down, thereby compressing spring 305. When base 306 is tightly attached to the top of duck tongue plate 702, screw 301 is stopped from being tightened. At this time, spring 305 is in a compressed state, realizing the convenient replacement of spring 305 in disassembly and assembly mechanism 3. The spring can be replaced by positioning component 307 and screw 301 is tightened and fixed. The spring can be replaced by reversing the operation, ensuring the stability of fuse tube 209 during operation.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A modular drop-out fuse, comprising an insulating support (1), characterized in that: The upper and lower ends of the insulating support (1) are provided with buffer mechanisms (2), and the upper and lower sides of the insulating support (1) are fixedly connected with insulating sheets (4) at equal intervals. The bottom of the buffer mechanism (2) is provided with a drop mechanism (5), and the upper and lower sides of the buffer mechanism (2) are provided with wiring assemblies (6). The right side of the buffer mechanism (2) is provided with a rain shield assembly (7), and the rain shield assembly (7) is provided with a disassembly and assembly mechanism (3) inside. The disassembly and assembly mechanism (3) is used to maintain the stability of the device. The buffer mechanism (2) includes two stationary contacts (201). The adjacent sides of the two stationary contacts (201) are fixedly connected to the upper and lower sides of the insulating support (1). The front and rear sides of the lower stationary contact (201) are fixedly connected to a connecting shaft (202). The outer walls of the two connecting shafts (202) are rotatably connected to a movable ring (203). The top of the two movable rings (203) is fixedly connected to an operating rod (204). The top of the two operating rods (204) is fixedly connected to a damper (205). The outer walls of the two dampers (205) are slidably connected to a spring (206). The tops of the two springs (206) and the two dampers (205) are fixedly connected to corresponding collars (207). The inner walls of the two collars (207) are rotatably connected to a fixed shaft (208). The adjacent ends of the two fixed shafts (208) are fixedly connected to the same fuse tube (209).

2. A modular drop-out fuse according to claim 1, characterized in that: The drop mechanism (5) includes a moving contact (501), the top of which is fixedly connected to the bottom of the lower stationary contact (201). The inner wall of the moving contact (501) is rotatably connected to a trunnion sleeve (502). The top right side of the trunnion sleeve (502) is fixedly connected to a pop-out plate (503). The top right side of the pop-out plate (503) is rotatably connected to a metal hoop (504). The top of the metal hoop (504) is fixedly connected to the bottom end of the fuse tube (209).

3. A modular drop-out fuse according to claim 1, characterized in that: The wiring assembly (6) includes two screws (601), which are threaded to the inner wall of the corresponding stationary contact (201). The outer walls of the two screws (601) are threaded with nuts (602). The upper screw (601) has an upper terminal (603) threaded to the middle of its outer wall, and the lower screw (601) has a lower terminal (604) threaded to the middle of its outer wall.

4. A modular drop-out fuse according to claim 1, characterized in that: The rain shield assembly (7) includes a rain shield plate (701), the bottom of which is fixedly connected to the top of the upper stationary contact (201), a duckbill plate (702) is fixedly connected to the right side of the inner wall of the rain shield plate (701), and a connecting buckle (703) is fixedly connected to the left side of the inner wall of the rain shield plate (701).

5. A modular drop-out fuse according to claim 4, characterized in that: The disassembly and assembly mechanism (3) includes a screw (301), the outer wall of which is threaded to the top of the rain shield (701), and a slider (303) is threaded to the bottom of the outer wall of the screw (301). A groove (302) is provided on the right side of the rain shield (701). The inner wall of the groove (302) is slidably connected to the outer wall of the slider (303). The bottom of the slider (303) is fixedly connected to a top plate (304). The bottom of the top plate (304) is fixedly connected to a spring (305). The bottom of the spring (305) is fixedly connected to a base (306). The bottom of the base (306) is in contact with the top of the duckbill plate (702). A positioning component (307) is provided on the inner wall of the groove (302).

6. A modular drop-out fuse according to claim 5, characterized in that: The positioning component (307) includes two springs (3071), the outer walls of the two springs (3071) are slidably connected to the front and rear sides of the inner wall of the slide groove (302), and a positioning ball (3072) is fixedly connected to each adjacent side of the two springs (3071). The slider (303) has positioning grooves (3073) on its front and rear sides, and the inner walls of the two positioning grooves (3073) are slidably connected to the outer walls of the corresponding positioning balls (3072).

7. A modular drop-out fuse according to claim 1, characterized in that: Each of the two connecting shafts (202) is fixedly connected to a limiting block (8) at one of its opposite ends, and the two limiting blocks (8) are respectively attached to the corresponding moving rings (203).

8. A modular drop-out fuse according to claim 3, characterized in that: The outer wall of the upper screw 2 (601) penetrates the inner wall of the rain shield (701), and the top of the rain shield (701) is in contact with the bottom of the upper terminal (603).

Images