Drop-out fuse tube

Abstract

The application belongs to the technical field of electric power operation, and discloses a drop-out fuse tube, wherein the drop-out fuse tube comprises an upper sleeve, a fuse tube, a lower sleeve, a bottom bracket and an elastic driving assembly; the upper sleeve is abutted against a pressing plate; the fuse tube comprises a fuse tube body, a fuse and a waterproof sleeve; the fuse tube body is detachably connected to the upper sleeve; the fuse is arranged in the fuse tube body and detachably connected to one end of the upper sleeve; the waterproof sleeve is arranged between the fuse and the fuse tube body; the lower sleeve is arranged outside the fuse tube body; the other end of the fuse is connected to the bottom bracket; and the elastic driving assembly is arranged between the fuse tube body and the bottom bracket and is configured to drive the bottom bracket away from the fuse tube body. The waterproof sleeve is used for waterproofing and moisture-proofing of the fuse; the upper sleeve is removed to facilitate observation of the use condition and quality state of the fuse; the fuse is connected to the bottom bracket, so that the bottom bracket can apply force to the fuse, and the fuse can be quickly dropped after being fused.

Description

Technical Field

[0001] This invention relates to the field of power operation technology, and in particular to a drop-out fuse tube. Background Technology

[0002] Drop-out fuses are a commonly used short-circuit protection switch. When a drop-out fuse is installed on a 10kV distribution line branch, it can reduce the power outage area. Because it has a clear disconnection point, it has the function of a disconnecting switch, thus creating a safe working environment for the maintenance section's lines and equipment.

[0003] Drop-out fuses generally consist of a fuse tube, upper cover groove, lower support, upper contact, lower contact, guide hook, operating ring, ceramic component, and mounting bracket. The fuse wire is usually housed inside the fuse tube. Over time, the fuse wire may become unwieldy or break. Especially in environments with persistent humidity, drop-out fuses are prone to accumulating moss and other plant matter inside the fuse tube, which not only reduces the fuse wire's lifespan but also necessitates frequent fuse maintenance.

[0004] Secondly, during the initial purchase or maintenance process, it is difficult to directly observe the quality of the fuse or determine its usage status through the fuse tube. Furthermore, during the fuse blowing process, it is impossible to quickly detect the fuse's failure and perform maintenance accordingly. If the fuse blowing process is prolonged, and there is incomplete melting and detachment, it will lead to single-phase operation of the transformer, causing even greater power supply problems. Summary of the Invention

[0005] The purpose of this invention is to provide a drop-out fuse tube that is waterproof and moisture-proof, facilitates observation of the fuse status, and allows the fuse to fall off quickly after melting.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Drop-out fuse tubes, including:

[0008] Upper sleeve, which abuts against the tablet press;

[0009] A fuse tube includes a fuse tube body, a fuse wire, and a waterproof sleeve. The fuse tube body is detachably connected to the upper sleeve. The fuse wire passes through the fuse tube body and is detachably connected to the upper sleeve at one end. The waterproof sleeve is disposed between the fuse wire and the fuse tube body.

[0010] The lower sleeve is fitted onto the outside of the fuse tube body;

[0011] The other end of the fuse is connected to the bottom bracket;

[0012] An elastic drive assembly, sandwiched between the fuse tube body and the bottom bracket, is configured to drive the bottom bracket away from the fuse tube body.

[0013] Optionally, the waterproof sleeve includes a thermoplastic tube that is fitted over the outside of the fuse, with one end detachably connected to the upper sleeve and the other end abutting against the bottom bracket.

[0014] Optionally, the waterproof sleeve may also include a drying tube, which is fitted over the outside of the thermoplastic tube and has one end detachably connected to the upper sleeve and the other end slidably connected to the fuse tube body.

[0015] Optionally, the upper sleeve includes an upper sleeve body and an upper contact. The upper sleeve body is sleeved on the outside of the fuse tube body. One end of the upper contact abuts against the pressure plate, and the other end is inserted into the fuse tube body and detachably connected to the fuse.

[0016] Optionally, the upper sleeve may further include a limiting sleeve, which is fitted over the outside of the upper contact and engages with the fuse tube body.

[0017] Optionally, the fuse tube body is provided with a receiving groove, the elastic drive assembly is slidably disposed in the receiving groove, and the fuse is slidably connected to the elastic drive assembly.

[0018] Alternatively, the elastic drive assembly includes a movable member that is slidably limited within the receiving groove along the length direction of the fuse, and the fuse is slidably connected to the movable member.

[0019] Optionally, the elastic drive assembly further includes a limiting post and an elastic element. One end of the limiting post is fixed to the movable element, and the other end is slidably connected to the fuse tube body. The elastic element is sleeved on the outside of the limiting post, and both ends are fixed to the accommodating groove wall and the movable element, respectively.

[0020] Optionally, the elastic drive assembly further includes a support member, the bottom bracket being provided with a groove, one end of the support member being fixed to the movable member, and the other end being slidably disposed in the groove.

[0021] Alternatively, the waterproof sleeve may be made of a transparent material.

[0022] The beneficial effects of this invention are:

[0023] The waterproof bushing facilitates waterproofing and moisture protection for the fuse inside the fuse tube, preventing contamination of the fuse tube and fuse by a humid environment and extending the fuse's service life. The detachable connection between the fuse and the upper bushing allows for easy removal of the upper bushing to observe the fuse's condition and quality. The fuse passes through the fuse tube body and is connected to the bottom bracket. An elastic drive component is sandwiched between the fuse tube body and the bottom bracket, allowing the bottom bracket to apply force to the fuse. This ensures the fuse quickly detaches after melting, allowing operators to visually observe the fuse's detachment and prevent transformer phase loss operation problems. Attached Figure Description

[0024] Figure 1 This is an overall structural diagram of the drop-out fuse tube described in this invention;

[0025] Figure 2 yes Figure 1 Enlarged view of A in the middle;

[0026] Figure 3 yes Figure 1 Enlarged view of B in the middle;

[0027] Figure 4 This is a schematic diagram of the drop-out fuse tube in use according to the present invention.

[0028] In the picture:

[0029] 100-Tablet compression; 10-Upper sleeve; 20-Fuse tube; 30-Lower sleeve; 40-Bottom bracket; 50-Elastic drive assembly; 11-Upper sleeve body; 12-Upper contact; 13-Limiting sleeve; 21-Fuse tube body; 22-Fuse; 23-Thermoplastic tube; 24-Drying tube; 401-Slide groove; 51-Moving part; 52-Limiting post; 53-Elastic part; 54-Supporting part. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] Drop-out fuses are a common type of short-circuit protection switch, consisting of a fuse tube, upper and lower contacts, a support, an operating ring, and a mounting bracket. In some fuses installed in humid environments for extended periods, moss and other plant matter can easily accumulate inside the fuse tube, contaminating it and reducing the lifespan of the fuse wire. Furthermore, it's difficult to directly observe the fuse's condition and status while it's inside the fuse tube. Even after the fuse has blown, incomplete detachment can lead to single-phase operation of the transformer, causing power problems.

[0034] Example 1

[0035] The technical solution of this embodiment will be further described below with reference to the accompanying drawings and specific implementation methods.

[0036] like Figures 1-4 As shown, this embodiment provides a drop-out fuse tube, including an upper sleeve 10, a fuse tube 20, a lower sleeve 30, a bottom bracket 40, and an elastic drive assembly 50. The upper sleeve 10 abuts against the pressure plate 100. The fuse tube 20 includes a fuse tube body 21, a fuse wire 22, and a waterproof sleeve. The fuse tube body 21 is detachably connected to the upper sleeve 10. The fuse wire 22 passes through the fuse tube body 21, with one end detachably connected to the upper sleeve 10. The waterproof sleeve is disposed between the fuse wire 22 and the fuse tube body 21. The lower sleeve 30 is fitted over the outside of the fuse tube body 21, and the other end of the fuse wire 22 is connected to the bottom bracket 40. The elastic drive assembly 50 is sandwiched between the fuse tube body 21 and the bottom bracket 40 and is configured to drive the bottom bracket 40 away from the fuse tube body 21.

[0037] In this embodiment, the waterproof sleeve facilitates waterproofing and moisture protection for the fuse 22 inside the fuse tube 20, preventing contamination of the fuse 22 by a humid environment and extending its service life. The detachable connection between the fuse 22 and the upper sleeve 10 allows for easy removal of the upper sleeve 10 to observe the usage and quality status of the fuse 22. The fuse 22 passes through the fuse tube body 21 and is connected to the bottom bracket 40. An elastic drive component 50 is sandwiched between the fuse tube body 21 and the bottom bracket 40, allowing the bottom bracket 40 to apply force to the fuse 22. This enables the fuse 22 to quickly detach after melting, allowing operators to visually observe the detachment status of the fuse 22 and preventing transformer phase loss operation problems.

[0038] The overall structure of the drop-out fuse tube in this embodiment will be described below.

[0039] like Figure 1 As shown, the drop-out fuse tube mainly includes an upper sleeve 10, a fuse tube 20, a lower sleeve 30, a bottom bracket 40, and an elastic drive assembly 50.

[0040] In this embodiment, one end of the upper sleeve 10 abuts against the pressure plate 100, and the other end is detachably connected to the fuse tube 20. The other end of the fuse tube 20 is fitted with a lower sleeve 30. The bottom bracket 40 is connected to the fuse tube 20, and the elastic drive assembly 50 is sandwiched between the bottom bracket 40 and the fuse tube 20. The upper sleeve 10 and the lower sleeve 30 cover both ends of the fuse tube 20, and the fuse tube 20 is further connected to the bottom bracket 40 through the elastic drive assembly 50.

[0041] like Figure 2 As shown, the upper sleeve 10 includes an upper sleeve body 11, an upper contact 12, and a limiting sleeve 13.

[0042] Optionally, the upper sleeve body 11 is configured as an annular cylindrical structure, with a through hole extending through it. In this embodiment, the upper sleeve body 11 is fitted onto the outside of the fuse tube 20, and the diameter of the through hole is equal to the outer diameter of the fuse tube 20. Specifically, the upper sleeve body 11 is fixed to the outside of the fuse tube 20, providing protection for the fuse tube 20 and improving the connection strength between the fuse tube 20 and other components.

[0043] The upper contact 12 is configured such that one end is snapped into the fuse tube 20, and the other end abuts against the pressure plate 100. This forms a circuit path between the pressure plate 100 and the fuse tube 20. At the same time, the upper contact 12 can be removed by snapping it in, which makes it easy to observe the internal condition of the fuse tube 20. This allows for random inspection of the fuse tubes of drop-out fuse tubes, reducing purchase costs. During long-term use, the upper contact 12 can also be removed to monitor the internal condition of the fuse tube 20 in real time and perform timely maintenance and replacement.

[0044] Furthermore, such as Figure 2As shown, a stepped groove is provided at one end of the upper contact 12. When the upper contact 12 is inserted into the fuse tube 20, the stepped groove is closely attached to the fuse tube 20, and the end face of the stepped groove is higher than the end face of the fuse tube 20, while the bottom surface of the stepped groove is lower than the end face of the fuse tube 20.

[0045] In this embodiment, the limiting sleeve 13 is configured to be sleeved on the outside of the upper contact 12 and inserted into the fuse tube 20.

[0046] Specifically, the limiting sleeve 13 is configured as a ring structure. The inner diameter of the limiting sleeve 13 is not less than the outer diameter of the upper contact 12 where the stepped groove is provided. The outer diameter of the limiting sleeve 13 is slightly larger than the inner diameter of the fuse tube 20, so that the limiting sleeve 13 and the fuse tube 20 are interference-fitted, thereby limiting the upper contact 12.

[0047] Optionally, when the limiting sleeve 13 is fitted onto the outside of the upper contact 12, one end face of the limiting sleeve 13 abuts against the bottom surface of the stepped groove, and the other end face is parallel to the end face of the stepped groove. The outer side of the limiting sleeve 13 is tightly attached to the fuse tube 20. Thus, the limiting sleeve 13 is clamped between the upper contact 12 and the fuse tube 20, limiting and fixing the position of the upper contact 12 inserted into the fuse tube 20.

[0048] Furthermore, the limiting sleeve 13 and the upper contact 12 are connected by a thread, which facilitates the removal of the upper contact 12 and limits and fixes its position when the upper contact 12 is not removed.

[0049] like Figure 2 As shown, the fuse tube 20 includes a fuse tube body 21, a fuse 22, a thermoplastic tube 23, and a drying tube 24.

[0050] In this embodiment, the fuse tube body 21 is configured as a cylindrical structure, with one end of the fuse tube body 21 being a sleeve end and the other end being a closed end. The upper sleeve 10 is detachably connected to the sleeve end of the fuse tube body 21. Specifically, the upper sleeve body 11 of the upper sleeve 10 is sleeved on the outside of the sleeve end of the fuse tube body 21, thereby achieving a fixed connection between the upper sleeve body 11 and the sleeve end of the fuse tube body 21.

[0051] Optionally, the fuse tube body 21 has a through-hole at the socket end, and the closed end seals the socket. For example... Figure 2 As shown, the upper contact 12 and the limiting sleeve 13 are inserted into the fuse tube body 21. The stepped groove of the upper contact 12 is close to the side wall of the socket of the fuse tube body 21. The limiting sleeve 13 is clamped between the upper contact 12 and the side wall of the socket, so as to realize the limiting and fixing of the upper contact 12 and the fuse tube body 21.

[0052] Furthermore, the fuse 22 passes through the fuse tube body 21, and one end is detachably connected to the upper sleeve 10. In this embodiment, the fuse 22 and the upper contact 12 are detachably connected. Specifically, one end of the fuse 22 is provided with a buckle, and the end of the upper contact 12 connected to the fuse 22 is provided with a groove. The buckle of the fuse 22 is configured to extend into the groove and abut against the bottom of the groove.

[0053] Optionally, the other end of the fuse 22 is connected to the bottom bracket 40. Specifically, the closed end of the fuse tube body 21 is provided with a through hole. The through hole extends along the length of the fuse tube body 21. The through hole connects to the socket hole, and the diameter of the through hole is smaller than the diameter of the socket hole but larger than the diameter of the fuse 22.

[0054] The fuse 22 is sequentially inserted through the socket and the through hole and connected to the bottom bracket 40. This achieves a sliding connection between the fuse 22 and the fuse tube body 21, so that the movement of the fuse 22 is not affected by the fuse tube body 21. After the fuse 22 melts, it can move in the socket and the through hole and quickly fall out of the fuse tube body 21, reducing the power consumption problem of the transformer operating with a single phase.

[0055] Specifically, a waterproof sleeve is provided between the fuse 22 and the fuse tube body 21. The waterproof sleeve is fitted over the outside of the fuse 22, and one end of the waterproof sleeve is detachably connected to the upper sleeve 10, while the other end is slidably connected to the fuse tube body 21. The waterproof sleeve can move synchronously with the fuse 22 within the fuse tube body 21, facilitating the melting and detachment of the fuse 22.

[0056] Furthermore, the waterproof sleeve includes a thermoplastic tube 23 and a drying tube 24. In this embodiment, the thermoplastic tube 23 is sleeved on the outside of the fuse 22, such as... Figure 2 and Figure 3 As shown, the inner diameter of the thermoplastic tube 23 is slightly larger than the outer diameter of the fuse 22, thereby achieving the coverage of the fuse 22.

[0057] Optionally, the thermoplastic tube 23 is made of a material that shrinks under heat. During operation, the fuse 22 generates a lot of heat, and the thermoplastic tube 23 shrinks under heat, increasing the wrapping effect on the fuse 22. This prevents the fuse 22 from becoming loose or breaking. When the fuse 22 melts and falls off, it can also ensure that the fuse 22 remains intact, allowing the fuse 22 to fall off completely from the fuse tube body 21.

[0058] Furthermore, one end of the thermoplastic tube 23 is detachably connected to the upper sleeve 10, and the other end abuts against the bottom bracket 40. Specifically, as shown... Figure 2 As shown, the thermoplastic tube 23 abuts against the snap fastener of the fuse 22 and is positioned in the groove of the upper contact 12.

[0059] Optionally, such as Figure 3As shown, the diameter of the through hole of the fuse tube body 21 is larger than the outer diameter of the thermoplastic tube 23. The thermoplastic tube 23 is sequentially inserted through the socket hole and the through hole and abuts against the bottom bracket 40.

[0060] like Figure 2 and Figure 3 As shown, the drying tube 24 is sleeved on the outside of the thermoplastic tube 23, and one end of the drying tube 24 is detachably connected to the upper sleeve 10, while the other end is slidably connected to the fuse tube body 21. Specifically, the inner diameter of the drying tube 24 is larger than the outer diameter of the thermoplastic tube 23, and the outer diameter of the drying tube 24 is smaller than the inner diameter of the sleeve hole of the fuse tube body 21, thereby achieving a sliding connection between the drying tube 24 and the fuse tube body 21.

[0061] Optionally, the drying tube 24 is detachably connected to the upper contact 12 of the upper sleeve 10. In this embodiment, the outer diameter of the drying tube 24 is the same as the inner diameter of the groove. The end of the drying tube 24 connected to the upper contact 12 is provided with an external thread, and the inner wall of the groove of the upper contact 12 is provided with an internal thread. The drying tube 24 and the thread on the groove are screwed together. That is, the drying tube 24 and the upper contact 12 are detachably connected by a screw connection.

[0062] Furthermore, after the drying tube 24 is screwed to the upper contact 12, it presses against the bottom surface of the groove of the upper contact 12, so that the fuse 22 and the upper contact 12 are in close contact, and a detachable connection between the fuse 22 and the upper contact 12 is achieved. In other embodiments, other methods can also be used to achieve a detachable connection between the fuse 22 and the upper sleeve 10.

[0063] Optionally, the drying tube 24 is configured as a desiccant compression molding structure, and the inner wall surface of the drying tube 24, that is, the contact surface between the drying tube 24 and the thermoplastic tube 23, is coated with an insulating and waterproof layer. The waterproof layer and desiccant material effectively provide waterproofing, moisture protection, insulation, and support, preventing the growth of moss or other plants inside the fuse tube 20 during rainy seasons or long-term humid environments. This extends the service life of the fuse tube 20 and the internal fuse 22, reducing the device failure rate.

[0064] Specifically, in this embodiment, the thermoplastic tube 23 and the drying tube 24 in the waterproof sleeve are made of transparent material, and the fuse tube body 21 is also made of transparent material, so that construction personnel can directly observe the working status of the fuse 22.

[0065] like Figure 3 As shown, the lower sleeve 30 is configured as an annular cylindrical structure. In this embodiment, the lower sleeve 30 is sleeved on the outside of the fuse tube 20. Specifically, the lower sleeve 30 is fixed to the outside of the closed end of the fuse tube body 21, which protects the fuse tube 20 and also improves the connection strength between the fuse tube 20 and other components.

[0066] like Figure 4 As shown, the bottom bracket 40 includes an additional spring, an extended spring pressure plate, and fastening screws. The additional spring is permanently welded to the lower sleeve 30. After the fuse 22 passes through the fuse tube body 21, the end of the fuse 22 is fastened to the extended spring pressure plate by the fastening screws.

[0067] Specifically, when the fuse is fixed, the extended spring plate presses the added spring, which is essentially in an energy storage state, providing a rebound force for the normal drop of the switch. Furthermore, the fuse 22 passes through the fuse tube body 21, the gap between the added spring and the extended spring plate in sequence, and is then reinforced and fixed to the extended spring plate by fastening screws.

[0068] In this embodiment, the extended spring pressure plate is also provided with a slide groove 401, and the elastic drive component 50 is slidably disposed in the slide groove 401, thereby realizing the connection between the elastic drive component 50 and the bottom bracket 40.

[0069] Furthermore, the elastic drive assembly 50 is sandwiched between the fuse tube body 21 and the bottom bracket 40, and is configured to drive the bottom bracket 40 away from the fuse tube body 21. Optionally, the fuse 22 and the thermoplastic tube 23 are slidably connected to the elastic drive assembly 50, and the drying tube 24 abuts against the elastic drive assembly 50. The elastic drive assembly 50 is configured with a certain degree of elasticity.

[0070] Specifically, the extended spring pressure plate supports the elastic drive assembly 50 through the slide groove 401 and compresses the elastic drive assembly 50, thereby storing energy in the fuse 22. This allows the fuse 22 to quickly disconnect under the elastic action of the elastic drive assembly 50 after it melts, causing the upper sleeve 10 to lose support and break away from the pressure plate 100, sliding down the inner wall of the fuse tube body 21. This reduces the problem of the fuse 22 not falling off after melting and also makes it easier for operators to visually judge the melting status of the fuse 22 and maintain and replace it in a timely manner.

[0071] Furthermore, by tightening the screws, the fuse 22 is stretched and pressed against the outer part of the extended spring pressure plate, thereby achieving secondary energy storage of the fuse 22, which further enhances the ability of the fuse 22 to quickly fall out of the fuse tube body 21 after melting.

[0072] Example 2

[0073] This embodiment provides a drop-out fuse tube, wherein components that are the same as or corresponding to those in Embodiment 1 are labeled with the same reference numerals as those in Embodiment 1. For simplicity, only the differences between Embodiment 2 and Embodiment 1 are described. The differences are as follows:

[0074] In this embodiment, a receiving groove is provided inside the closed end of the fuse tube body 21, and the through hole of the fuse tube body 21 communicates with the receiving groove. Figure 3 As shown, the elastic drive component 50 is slidably disposed in the receiving groove.

[0075] Specifically, the elastic drive assembly 50 includes a movable member 51, a limiting post 52, an elastic member 53, and a support member 54. The movable member 51 slides along the length of the fuse 22 and is limited within the receiving groove, and the fuse 22 is slidably connected to the movable member 51.

[0076] Optionally, the movable component 51 is configured as a plate-like structure, and a through hole is provided on the movable component 51, with the through hole and the through-hole located on the same axis. The fuse 22 can pass through the through hole to move within the receiving groove, and simultaneously detach from the through hole after melting. Specifically, the fuse 22 and the thermoplastic tube 23 are slidably connected to the through hole of the movable component 51, and the drying tube 24 abuts against the movable component 51.

[0077] Furthermore, a limiting post 52 and an elastic member 53 are fixedly connected to one side of the movable member 51, and a support member 54 is fixedly connected to the other side. In this embodiment, the two limiting posts 52 are symmetrically arranged on the movable member 51, located on both sides of the fuse 22. Furthermore, the other ends of the two limiting posts 52 are slidably connected to the fuse tube body 21, thereby enabling the movable member 51 to slide stably within the receiving groove and preventing it from tilting.

[0078] Furthermore, the elastic element 53 is sleeved on the outside of the limiting post 52, with its two ends fixed to the accommodating groove wall and the movable element 51, respectively. The elastic element 53 applies a pushing or pulling force to the movable element 51, facilitating the reset of the movable element 51 and storing energy in a compressed state.

[0079] In this embodiment, the elastic element 53 is set as a spring, but in other embodiments it can also be set as other structures with elastic effects.

[0080] Optionally, the support member 54 is disposed on the side of the movable member 51 near the bottom bracket 40. One end of the support member 54 is fixed to the movable member 51, and the other end is slidably disposed in the slide groove 401. When the support member 54 slides toward the fuse tube body 21 in the slide groove 401, the movable member 51 is compressed by force to compress the elastic member 53, and the limiting post 52 slides in the receiving groove, pressing against the drying tube 24.

[0081] Specifically, after the thermoplastic tube 23 is sleeved on the outside of the fuse 22, the snap-fit ​​end of the fuse 22 is placed against the bottom of the groove of the upper contact 12. The drying tube 24 is sleeved on the outside of the thermoplastic tube 23 and screwed into the groove of the upper contact 12. The other end of the drying tube 24 is placed against the movable part 51, and the other end of the thermoplastic tube 23 is placed against the extended spring pressure plate. The fuse 22 is tightly attached to the outside of the extended spring pressure plate, and the end of the fuse 22 is fastened with a fastening screw. At the same time, the support 54 is placed against the slide groove 401 of the extended spring pressure plate, completing the overall installation of the device.

[0082] After installation, the extended spring pressure plate is pressed tight, causing the support member 54 to slide upward in the slide groove 401, pushing the movable member 51 to compress the elastic member 53 upward in the receiving groove, and causing the limiting post 52 to slide inside the fuse tube body 21.

[0083] Under the action of the elastic element 53, the fuse 22 is provided with a storage of energy. After the fuse 22 melts, the stored energy can be released quickly, causing the movable element 51 to pop down a certain distance, which facilitates the rapid disconnection between the upper contact 12 and the pressure plate 100. At the same time, the support element 54 pushes the extended spring pressure plate downward, so that the fuse falls off completely.

[0084] Optionally, after the fastening screw stretches the fuse 22 against the outer part of the extended spring pressure plate, it can press and fix the end of the fuse 22 to provide secondary energy storage, further enhancing the ability of the fuse 22 to quickly fall out into the fuse tube body 21 after it melts.

[0085] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A drop-out fuse tube, characterized in that, include: Upper sleeve (10), which abuts against the pressure plate (100). The fuse tube (20) includes a fuse tube body (21), a fuse (22), and a waterproof sleeve. The fuse tube body (21) is detachably connected to the upper sleeve (10). The fuse (22) passes through the fuse tube body (21) and is detachably connected to the upper sleeve (10) at one end. The waterproof sleeve is disposed between the fuse (22) and the fuse tube body (21). The lower sleeve (30) is sleeved on the outside of the fuse tube body (21); Bottom bracket (40), the other end of the fuse (22) is connected to the bottom bracket (40); An elastic drive assembly (50), sandwiched between the fuse tube body (21) and the bottom bracket (40), is configured to drive the bottom bracket (40) away from the fuse tube body (21). The waterproof sleeve includes a thermoplastic tube (23), which is sleeved on the outside of the fuse (22), and one end is detachably connected to the upper sleeve (10), while the other end abuts against the bottom bracket (40). The waterproof sleeve also includes a drying tube (24), which is sleeved on the outside of the thermoplastic tube (23), and one end is detachably connected to the upper sleeve (10), while the other end is slidably connected to the fuse tube body (21). The fuse tube body (21) is provided with a receiving groove, the elastic drive assembly (50) is slidably disposed in the receiving groove, and the fuse (22) is slidably connected to the elastic drive assembly (50). The elastic drive assembly (50) includes a movable member (51), which slides within the receiving groove along the length direction of the fuse (22), and the fuse (22) is slidably connected to the movable member (51). The elastic drive assembly (50) further includes a limiting post (52) and an elastic element (53). One end of the limiting post (52) is fixed to the movable element (51), and the other end is slidably connected to the fuse tube body (21). The elastic element (53) is sleeved on the outside of the limiting post (52), and both ends are fixed to the accommodating groove wall and the movable element (51) respectively. The elastic drive assembly (50) also includes a support member (54), and a groove (401) is provided on the bottom bracket (40). One end of the support member (54) is fixed to the movable member (51), and the other end is slidably disposed in the groove (401). The fuse (22) and the thermoplastic tube (23) are slidably connected to the through hole of the movable part (51), and the drying tube (24) abuts against the movable part (51).

2. The drop-out fuse tube according to claim 1, characterized in that, The upper sleeve (10) includes an upper sleeve body (11) and an upper contact (12). The upper sleeve body (11) is sleeved on the outside of the fuse tube body (21). One end of the upper contact (12) abuts against the pressure plate (100), and the other end is inserted into the fuse tube body (21) and detachably connected to the fuse (22).

3. The drop-out fuse tube according to claim 2, characterized in that, The upper sleeve (10) also includes a limiting sleeve (13), which is sleeved on the outside of the upper contact (12) and inserted into the fuse tube body (21).

4. The drop-out fuse tube according to any one of claims 1-3, characterized in that, The waterproof sleeve is made of a transparent material.

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