Remotely controllable high voltage drop-out fuse

Abstract

The utility model discloses high pressure drop -out fuse of remote control, relates to fuse technical field, including insulating piece and fuse piece, the insulating piece both ends are connected with fuse piece through upper locking piece and lower locking piece respectively, the fuse piece is including fuse tube, the slide connection of fuse tube has the guide rod, the rotary connection of fuse tube has the adjusting ring, the inclined guide slot is established on the inner wall of adjusting ring, the plug rod that is inserted into the guide slot is equipped on the guide rod, the movable contact is equipped on the guide rod, the heat conduction box is equipped in the fuse tube, the slide connection of heat conduction box has the limiting rod for limiting the rotation of adjusting ring, the heat expansion gas is filled in the heat conduction box, the upper locking piece includes the stationary contact that can be contacted with movable contact, is equipped with the control unit for controlling the stationary contact movement on the upper locking piece, the utility model can carry out the protective opening of pre -planning after remote control failure also.

Description

Technical Field

[0001] This utility model relates to the field of fuse technology, and in particular to a remotely controllable high-voltage drop-out fuse. Background Technology

[0002] High-voltage drop-out fuses are installed between high-voltage lines and transformers in power grids to facilitate maintenance and repair of transformer equipment and lines, or to meet power rationing needs. Ordinary high-voltage drop-out fuses generally consist of a high-voltage porcelain insulator, a fuse tube, and a high-voltage switch. One end of the fuse tube is movably connected to the porcelain insulator and the high-voltage switch, while the other end is connected to the porcelain insulator via a fuse hook. When opening the circuit breaker, a special high-voltage insulating rod is required to manually pull it down. During operation, operators need to wear insulating boots and gloves, making the operation cumbersome and prone to safety accidents, especially during inclement weather such as rain. Currently, wireless remote control is also used to open and close the fuse, providing timely pre-protection for the line.

[0003] However, when using remotely controlled drop-out fuses for circuit breaker control, if the control system malfunctions or fails, causing the fuse temperature to rise sharply and the temperature signal to be unable to be transmitted in real time, the fuse cannot be protected in time. As a result, the fuse wire will burn out on its own to protect itself. This not only requires frequent replacement of the fuse, but also makes it difficult to provide effective protection for the line.

[0004] Therefore, the invention of a remotely controllable high-voltage drop-out fuse solves the above problems. Summary of the Invention

[0005] The main purpose of this utility model is to provide a remotely controllable high-voltage drop-out fuse, which can effectively solve the technical problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a remotely controllable high-voltage drop-out fuse, comprising an insulating component and a fuse element. The two ends of the insulating component are connected to the fuse element via an upper locking component and a lower locking component, respectively. The fuse element includes a fuse tube, a guide rod slidably connected inside the fuse tube, and an adjusting ring rotatably connected inside the fuse tube. An inclined guide groove is provided on the inner wall of the adjusting ring. The guide rod is provided with a plug inserted into the guide groove and a moving contact. A heat-conducting box is provided inside the fuse tube, and a limiting rod for limiting the rotation of the adjusting ring is slidably connected inside the heat-conducting box. The heat-conducting box is filled with thermally expanding gas. The upper locking component includes a stationary contact that can contact the moving contact and a control unit for controlling the movement of the stationary contact.

[0007] Preferably, the fusible element includes a mounting ring fixedly connected to the fusible tube, an annular groove is provided in the mounting ring, the adjusting ring is slidably connected to the annular groove through a slider, a positioning block is fixed in the annular groove, and a first elastic element is provided between the slider and the positioning block.

[0008] Preferably, an auxiliary plate is fixed on the guide rod and slidably connected to the melting tube, a limiting plate is fixed inside the melting tube between the mounting ring and the auxiliary plate, and a second elastic element is fitted on the guide rod between the auxiliary plate and the limiting plate.

[0009] Preferably, a push plate is slidably connected to the limiting rod inside the heat-conducting box, the thermal expansion gas is located inside the heat-conducting box on the side of the push plate near the limiting rod, and the side of the push plate away from the limiting rod is connected to the heat-conducting box through a third elastic element.

[0010] Preferably, the height of the guide groove gradually increases in the counterclockwise direction along the melting tube, a limiting hole is provided on the circumferential side of the adjusting ring, the limiting rod can be inserted into the limiting hole and can move along the circumferential side of the adjusting ring, and an operating ring that is rotatably connected to the melting tube is fixed on the adjusting ring by an operating rod.

[0011] Preferably, the upper locking member includes a connecting seat fixedly connected to the insulating member, the stationary contact is an elastic conductive metal sheet, a support box is slidably connected to the connecting seat, an insulating rod fixedly connected to the stationary contact is slidably connected inside the support box, and the free end of the insulating rod is connected to the support box by a spring.

[0012] Preferably, an electric push rod is fixed on the connecting seat, and the output end of the electric push rod is fixedly connected to the support box for controlling the position change of the stationary contact. A fuse is provided between the guide rod and the lower locking member.

[0013] Preferably, the control unit includes a control panel, a wireless transmission module, and a temperature sensor located inside the molten tube, wherein the temperature sensor and the electric push rod are both electrically connected to the control panel.

[0014] Preferably, the wireless transmission module is a GPRS wireless transmission module, and the control unit connects to the cloud platform server through the wireless transmission module. The cloud platform server is used to receive and identify the signals of the control unit.

[0015] Preferably, the lower locking member includes a connecting frame with grooves that is fixedly connected to the insulating member, a hook that matches the connecting frame is fixed on the fusible tube, and a torsion spring is provided between the connecting frame and the hook.

[0016] The technical effects and advantages of this utility model are as follows: This invention utilizes the coordinated linkage of thermal expansion gas, adjusting ring, guide groove, guide rod, limiting rod, and limiting hole. This not only allows the thermal expansion gas and limiting rod to release the restriction on the adjusting ring when the temperature inside the fuse tube rises, but also enables the adjusting ring to quickly disengage the moving contact from the stationary contact via the guide groove, insert rod, and guide rod. Simultaneously, the sliding force of the guide rod acts on the adjusting ring, causing it to rotate rapidly, ensuring the moving and stationary contacts disengage quickly and preventing arcing. Furthermore, it provides a degree of protection for the fuse, extending its service life and reducing the need for frequent fuse replacements. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the upper locking component in this utility model; Figure 3 This is a cross-sectional view of the upper locking component in this utility model; Figure 4 This is a structural schematic diagram of the lower locking component in this utility model; Figure 5 This is a schematic diagram of the fuse in this utility model; Figure 6 This is a cross-sectional view of the fuse in this utility model; Figure 7 This utility model Figure 6 A magnified view of a section at point A in the middle; Figure 8 This is a cross-sectional view of the fuse element in this utility model from another perspective; Figure 9 This is a schematic diagram of the internal structure of the fuse in this utility model; Figure 10 This is a schematic diagram showing the structure of the mounting ring in this utility model.

[0018] In the diagram: 1. Insulating component; 2. Fuse; 201. Fusible tube; 202. Guide rod; 203. Adjusting ring; 204. Guide groove; 205. Insert rod; 206. Moving contact; 207. Heat-conducting box; 208. Limiting rod; 209. Thermal expansion gas; 210. Mounting ring; 211. Annular groove; 212. Slider; 213. Positioning block; 214. First elastic element; 215. Auxiliary plate; 216. Limiting plate; 217. Second elastic element; 218. Push plate; 219. Third elastic element; 220. Limiting hole; 221. Operating rod; 222. Operating ring; 3. Upper locking element; 301. Stationary contact; 302. Connecting seat; 303. Support box; 304. Insulating rod; 305. Spring; 306. Electric push rod; 307. Fuse; 4. Lower locking component; 401. Connecting bracket; 402. Hook component; 403. Torsion spring; 5. Control unit; 501. Temperature sensor. Detailed Implementation

[0019] 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.

[0020] Example 1 like Figures 1 to 4 As shown, this embodiment provides a remotely controllable high-voltage drop-out fuse, including an insulating component 1 and a fuse 2. The two ends of the insulating component 1 are connected to the fuse 2 through an upper locking component 3 and a lower locking component 4, respectively. The upper locking component 3 is provided with a control unit 5 for controlling the movement of the stationary contact 301.

[0021] The upper locking member 3 includes a connecting seat 302 fixedly connected to the insulating member 1, a stationary contact 301 being an elastic conductive metal sheet, a support box 303 slidably connected to the connecting seat 302, an insulating rod 304 fixedly connected to the stationary contact 301 slidably connected inside the support box 303, and the free end of the insulating rod 304 being connected to the support box 303 via a spring 305.

[0022] An electric push rod 306 is fixed on the connecting seat 302. The output end of the electric push rod 306 is fixedly connected to the support box 303 and is used to control the position change of the stationary contact 301. A fuse 307 is provided between the guide rod 202 and the lower locking member 4.

[0023] The control unit 5 includes a control panel, a wireless transmission module, and a temperature sensor 501 located inside the fusible tube 201. The temperature sensor 501 and the electric push rod 306 are both electrically connected to the control panel.

[0024] The wireless transmission module is a GPRS wireless transmission module. The control unit 5 connects to the cloud platform server through the wireless transmission module. The cloud platform server is used to receive and identify the signals of the control unit 5.

[0025] The lower locking member 4 includes a connecting frame 401 with grooves that is fixedly connected to the insulating member 1. A hook member 402 that matches the connecting frame 401 is fixed on the fuse tube 201. A torsion spring 403 is provided between the connecting frame 401 and the hook member 402.

[0026] In use, when the temperature sensor 501 detects that the temperature inside the fuse tube 201 exceeds the normal range, the temperature sensor 501 transmits the temperature signal in real time to the cloud platform server via the wireless transmission module on the control unit 5 for analysis. When it is necessary to separate the stationary contact 301 and the fuse 2, the cloud platform server transmits a control signal to the control unit 5. The control unit 5 then activates the electric push rod 306 via the control panel. The electric push rod 306 drives the support box 303 to slide along the connecting seat 302, thus allowing the support box to... 303 drives the stationary contact 301 away from the fuse 2 via the insulating rod 304, so that the upper locking member 3 no longer locks the fuse 2. At this time, under the action of the torsion spring 403 and the weight of the fuse 2 itself, the torsion spring 403 drives the fuse 2 to swing downward along the connecting frame 401 via the hook member 402, thereby completing the separation of the fuse 2 from the stationary contact 301. In this way, when the internal temperature of the fuse 2 is abnormal, the abnormal temperature signal can be remotely fed back for remote decision-making, which not only ensures the safety of the line, but also improves the service life of the fuse.

[0027] Example 2 During the above-mentioned use, it was found that when the temperature sensor 501 malfunctions or the control unit 5 malfunctions, the transmitted temperature signal deviates. This makes it easy to misjudge the internal temperature of the fuse 2 and make it impossible to decide whether to remotely disconnect the line connection. As a result, it is impossible to protect the abnormal line in time, which eventually leads to the fuse 2 melting and protecting itself. Therefore, further improvements were made based on the above-mentioned embodiments.

[0028] like Figures 3 to 10 As shown, the fuse element 2 includes a fuse tube 201, a guide rod 202 slidably connected inside the fuse tube 201, an adjusting ring 203 rotatably connected inside the fuse tube 201, an inclined guide groove 204 is provided on the inner wall of the adjusting ring 203, an insertion rod 205 is provided on the guide rod 202 to insert into the guide groove 204, a moving contact 206 is provided on the guide rod 202, a heat-conducting box 207 is provided inside the fuse tube 201, a limiting rod 208 for limiting the rotation of the adjusting ring 203 is slidably connected inside the heat-conducting box 207, and the heat-conducting box 207 is filled with thermal expansion gas 209. The upper locking element 3 includes a stationary contact 301 that can contact the moving contact 206.

[0029] The fuse element 2 includes a mounting ring 210 fixedly connected to the fuse tube 201. An annular groove 211 is provided in the mounting ring 210. An adjusting ring 203 is slidably connected to the annular groove 211 via a slider 212. A positioning block 213 is fixed in the annular groove 211. A first elastic element 214 is provided between the slider 212 and the positioning block 213.

[0030] An auxiliary plate 215 is fixed on the guide rod 202 and slidably connected to the melting tube 201. A limiting plate 216 is fixed inside the melting tube 201 between the mounting ring 210 and the auxiliary plate 215. A second elastic element 217 is fitted on the guide rod 202 between the auxiliary plate 215 and the limiting plate 216.

[0031] A push plate 218 is slidably connected to a limiting rod 208 inside the heat conduction box 207. The thermal expansion gas 209 is located inside the heat conduction box 207 on the side of the push plate 218 close to the limiting rod 208. The side of the push plate 218 away from the limiting rod 208 is connected to the heat conduction box 207 through a third elastic member 219.

[0032] The height of the guide groove 204 gradually increases in the counterclockwise direction along the melting tube 201. A limit hole 220 is provided on the circumferential side of the adjusting ring 203. The limit rod 208 can be inserted into the limit hole 220 and can move along the circumferential side of the adjusting ring 203. An operating ring 222 that is rotatably connected to the melting tube 201 is fixed on the adjusting ring 203 through the operating rod 221.

[0033] In use, when the remote control of the control unit 5 fails and the temperature inside the fuse tube 201 becomes abnormal, the heat inside the fuse tube 201 is transferred to the heat-conducting box 207, causing the internal temperature of the heat-conducting box 207 to rise. As a result, the thermal expansion gas 209 inside the heat-conducting box 207 expands due to the heat, gradually increasing its volume. This causes the pressure of the thermal expansion gas 209 inside the heat-conducting box 207 to gradually exceed the elastic force of the third elastic element 219. The thermal expansion gas 209 then pushes the push plate 218 along the heat-conducting box 207 away from the adjusting ring. When the third elastic element 219 is compressed, the push plate 218 drives the limiting rod 208 to be pulled out from the limiting hole 220, and no longer positions the rotation of the adjusting ring 203. At this time, under the action of the first elastic element 214, the first elastic element 214 drives the adjusting ring 203 to rotate counterclockwise along the mounting ring 210 through the slider 212. The rotation of the adjusting ring 203 drives the guide rod 202 to slide along the direction of the fuse tube 201 towards the locking part 4 through the inclined guide groove 204 and the insertion rod 205.

[0034] Simultaneously, under the action of the second elastic element 217, the second elastic element 217 drives the guide rod 202 to slide downward towards the locking part 4 through the auxiliary plate 215. At this time, with the cooperation of the first elastic element 214 and the second elastic element 217, the adjusting ring 203 can rotate quickly. The adjusting ring 203 rotates quickly and drives the guide rod 202 to slide quickly along the fuse tube 201 towards the locking part 4 through the guide groove 204 and the insertion rod 205. This allows the guide rod 202 to slide quickly along the fuse tube 201 together with the moving contact 206. This not only allows the moving contact 206 and the stationary contact 301 to separate quickly, but also reduces the occurrence of arcing. Then, under the action of the torsion spring 403 and the weight of the fuse 2 itself, the torsion spring 403 drives the fuse 2 to swing downward along the connecting frame 401 through the hook part 402, thereby completing the complete separation of the moving contact 206 and the stationary contact 301, thus providing a certain degree of pre-protection for the line.

[0035] After the faulty circuit is repaired, since the fuse 307 is within its normal operating range, simply rotate the operating ring 222 to drive the adjusting ring 203 clockwise via the operating lever 221. As the thermal expansion gas 209 inside the heat-conducting box 207 gradually dissipates and returns to its initial state, under the action of the third elastic element 219, the third elastic element 219 drives the limiting rod 208 to contact the circumferential side of the adjusting ring 203 via the push plate 218. When the adjusting ring 203... When the limiting hole 220 and the limiting rod 208 are in the same straight line, the limiting rod 208 is inserted into the limiting hole 220 to limit the rotation of the adjusting ring 203. During the rotation of the adjusting ring 203, the adjusting ring 203 drives the guide rod 202 to slide through the guide groove 204 and the insertion rod 205. The guide rod 202 moves with the moving contact 206 to the initial position, and then pushes the fuse tube 201 to be locked between the upper locking member 3 and the lower locking member 4 again, so that the moving contact 206 and the stationary contact 301 contact each other again.

[0036] In summary, through the coordinated linkage of the thermal expansion gas 209, adjusting ring 203, guide groove 204, guide rod 202, limiting rod 208, and limiting hole 220, the thermal expansion gas 209 and limiting rod 208 can release the restriction on the adjusting ring 203 when the temperature inside the fuse tube 201 rises. This allows the adjusting ring 203 to drive the moving contact 206 to quickly disengage from the stationary contact 301 via the guide groove 204, insert rod 205, and guide rod 202. Simultaneously, the sliding force of the guide rod 202 also acts on the adjusting ring 203, causing it to rotate rapidly. This ensures that the moving contact 206 and stationary contact 301 can quickly disengage, preventing arcing. Furthermore, it provides a certain degree of protection for the fuse 307, increasing the fuse's service life and reducing the need for frequent fuse replacements.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A remotely controllable high-voltage drop-out fuse, comprising an insulating component (1) and a fusible element (2), wherein both ends of the insulating component (1) are connected to the fusible element (2) via an upper locking component (3) and a lower locking component (4), characterized in that, The fuse (2) includes a fuse tube (201), a guide rod (202) is slidably connected inside the fuse tube (201), an adjusting ring (203) is rotatably connected inside the fuse tube (201), an inclined guide groove (204) is provided on the inner wall of the adjusting ring (203), an insert rod (205) is provided on the guide rod (202) and a moving contact (206) is provided on the guide rod (202). 01) A heat-conducting box (207) is provided inside. A limiting rod (208) for limiting the rotation of the adjusting ring (203) is slidably connected inside the heat-conducting box (207). The heat-conducting box (207) is filled with thermal expansion gas (209). The upper locking member (3) includes a stationary contact (301) that can contact the moving contact (206). The upper locking member (3) is provided with a control unit (5) for controlling the movement of the stationary contact (301).

2. The remotely controllable high-voltage drop-out fuse according to claim 1, characterized in that: The fuse element (2) includes a mounting ring (210) fixedly connected to the fuse tube (201). An annular groove (211) is provided in the mounting ring (210). The adjusting ring (203) is slidably connected to the annular groove (211) through a slider (212). A positioning block (213) is fixed in the annular groove (211). A first elastic element (214) is provided between the slider (212) and the positioning block (213).

3. The remotely controllable high-voltage drop-out fuse according to claim 2, characterized in that: An auxiliary plate (215) is fixed on the guide rod (202) and slidably connected to the melting tube (201). A limiting plate (216) is fixed inside the melting tube (201) between the mounting ring (210) and the auxiliary plate (215). A second elastic element (217) is fitted on the guide rod (202) between the auxiliary plate (215) and the limiting plate (216).

4. The remotely controllable high-voltage drop-out fuse according to claim 3, characterized in that: The heat-conducting box (207) is slidably connected to the limiting rod (208). The thermal expansion gas (209) is located in the heat-conducting box (207) on the side of the push plate (218) close to the limiting rod (208). The side of the push plate (218) away from the limiting rod (208) is connected to the heat-conducting box (207) through a third elastic element (219).

5. The remotely controllable high-voltage drop-out fuse according to claim 4, characterized in that: The height of the guide groove (204) gradually increases in the counterclockwise direction of the melting tube (201). A limiting hole (220) is provided on the circumferential side of the adjusting ring (203). The limiting rod (208) can be inserted into the limiting hole (220) and can move along the circumferential side of the adjusting ring (203). An operating ring (222) that is rotatably connected to the melting tube (201) is fixed on the adjusting ring (203) through an operating rod (221).

6. The remotely controllable high-voltage drop-out fuse according to claim 5, characterized in that: The upper locking member (3) includes a connecting seat (302) fixedly connected to the insulating member (1), the stationary contact (301) is an elastic conductive metal sheet, a support box (303) is slidably connected to the connecting seat (302), an insulating rod (304) fixedly connected to the stationary contact (301) is slidably connected inside the support box (303), and the free end of the insulating rod (304) is connected to the support box (303) through a spring (305).

7. The remotely controllable high-voltage drop-out fuse according to claim 6, characterized in that: An electric push rod (306) is fixed on the connecting seat (302). The output end of the electric push rod (306) is fixedly connected to the support box (303) and is used to control the position change of the stationary contact (301). A fuse (307) is provided between the guide rod (202) and the lower locking member (4).

8. The remotely controllable high-voltage drop-out fuse according to claim 1, characterized in that: The control unit (5) includes a control panel, a wireless transmission module, and a temperature sensor (501) located inside the fusible tube (201). The temperature sensor (501) and the electric push rod (306) are both electrically connected to the control panel.

9. The remotely controllable high-voltage drop-out fuse according to claim 8, characterized in that: The wireless transmission module is a GPRS wireless transmission module. The control unit (5) is connected to the cloud platform server through the wireless transmission module. The cloud platform server is used to receive and identify the signals of the control unit (5).

10. The remotely controllable high-voltage drop-out fuse according to claim 1, characterized in that: The lower locking member (4) includes a connecting frame (401) fixedly connected to the insulating member (1) and having a groove. A hook (402) matching the connecting frame (401) is fixed on the fusion tube (201). A torsion spring (403) is provided between the connecting frame (401) and the hook (402).

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