Intelligent drop-out fuse and automatic opening and closing control method thereof

Abstract

Disclosed is an intelligent drop-out fuse, comprising: a fuse tube, in which a fuse is arranged, the lower end of the fuse tube can be rotatably arranged on the lower contact bracket, and the upper end is used to be combined with the upper contact bracket; an execution component, comprising a guide rail box, a slider, an electromagnet and an auxiliary spring, the guide rail box is arranged on the upper contact bracket, the slider can be slidably arranged in the guide rail box, an electromagnet is arranged on opposite sides of the slider moving path of the guide rail box, each electromagnet is sleeved with an auxiliary spring, and the auxiliary spring is connected to the guide rail box at one end close to the corresponding electromagnet; a push rod, one end of the push rod is rotatably connected to the slider, and the other end is rotatably connected to the fuse tube, and the push rod and the fuse tube are detachably connected; an intelligent component, used to detect the working state of the fuse tube; a processing unit, used to receive the working state information of the intelligent component and send an action instruction to the execution component. The fuse can greatly improve the safety of the operation of the power equipment. Also disclosed is an automatic opening and closing method.

Description

Technical Field

[0001] The present invention relates to the technical field of fuses, and more specifically, to an intelligent drop-out type fuse and an automatic opening and closing control method thereof. Background Art

[0002] A fuse is an electronic component that protects power circuits. It is an electrical appliance that uses the heat generated by itself to melt the fuse and disconnect the circuit when the current exceeds the specified value. It is a current protector made based on the principle that after the current exceeds the specified value for a period of time, the heat generated by itself will melt the fuse and disconnect the circuit.

[0003] However, the existing fuses have a low level of intelligence and cannot monitor and judge the risk status of the fuse tube in real time, and automatically control the corresponding opening and closing according to the monitoring and judgment results. In addition, the opening and closing stability of the existing fuses is poor. Furthermore, the existing fuses cannot extinguish themselves quickly, resulting in the emergence of safety hazards, and the safety is poor. Summary of the invention

[0004] In view of this, an object of the present invention is to provide an intelligent drop-out fuse and an automatic opening and closing control method thereof, aiming to solve the problems existing in the prior art.

[0005] According to a first aspect of the present invention, there is provided an intelligent drop-out fuse, comprising:

[0006] A fuse tube, in which a fuse is arranged, wherein the lower end of the fuse tube can be rotatably arranged on the lower contact support, and the upper end of the fuse tube is used to be combined with the upper contact support;

[0007] An actuator assembly, comprising a guide rail box, a slider, an electromagnet and an auxiliary spring, wherein the guide rail box is arranged on the upper contact bracket, the slider is slidably arranged in the guide rail box, an electromagnet is respectively arranged on opposite sides of the moving path of the slider on the guide rail box, each electromagnet is sleeved with an auxiliary spring, and one end of the auxiliary spring close to the corresponding electromagnet is connected to the guide rail box;

[0008] A push rod, one end of which is rotatably connected to the slider, and the other end of which is rotatably connected to the melting tube, and the push rod and the melting tube are detachably connected;

[0009] An intelligent component, arranged on the melting tube, for detecting the working state of the melting tube;

[0010] The processing unit is arranged on the guide rail box and is electrically connected to the intelligent component and the execution component respectively, and is used for receiving the working state information of the intelligent component and issuing action instructions to the execution component.

[0011] Preferably, a pull ring is provided at the upper end of the fusion tube, a dropper is provided between the pull ring and the lower end of the push rod, and the pull ring and the push rod are connected via the dropper;

[0012] The shedder includes two bracket plates, an automatic spring block, a connecting shaft and a connecting torsion spring. The two bracket plates are parallel to each other and are arranged at a preset distance. A bracket plate is respectively passed through the two ends of the connecting shaft and is rotatably connected to the bracket plates. The connecting torsion springs are respectively sleeved on the two ends of the connecting shaft. One leg of the connecting torsion spring is fixed on the connecting shaft, and the other leg is fixed on the corresponding bracket plate. An automatic spring block is respectively provided on one side of each bracket plate away from the connecting shaft. The two automatic spring blocks are used in combination to separate or combine with the pull ring.

[0013] Preferably, the automatic spring block includes a block, a spring column, a magnet, a return spring and a driving magnet. The spring column can be slidably passed through the block. The driving magnet is fixed to the end face of the first end of the block. The first end of the spring column can be slidably passed through the driving magnet. The second end of the spring column passes through the block to form a spring tongue. The magnet is arranged on the spring column and is located between the driving magnet and the spring tongue. The return spring is arranged on the spring column and is located between the magnet and the driving magnet.

[0014] Preferably, a pre-tightening device is further included, and the pre-tightening device includes:

[0015] A locking and adjusting assembly connected to the fusion tube via a sleeve joint;

[0016] An elastic guide piece, which is a curved structure, wherein a first end of the elastic guide piece is located at the lower end of the melting tube, and a second end is connected to the lower contact support and is disposed close to the locking adjustment assembly;

[0017] A pre-tightening torsion spring, arranged on the lower contact bracket, with a first leg fixed on the lower contact bracket and a second leg fixed on the elastic guide sheet;

[0018] Wherein, the fuse passes through the elastic guide piece and is connected to the locking and adjusting component, and is pre-tightened and fixed by the locking and adjusting component.

[0019] Preferably, the locking and adjusting assembly comprises:

[0020] The lock body comprises a connecting plate and a baffle plate which are vertically connected to each other and have an adjustment slot therein;

[0021] A connecting block, which is an L-shaped structure and can be slidably disposed in the adjusting groove;

[0022] A connecting stud, which is provided on the connecting block and has a locking nut on the knob;

[0023] An adjusting screw, wherein the first end of the adjusting screw is connected to the connecting block, the second end of the adjusting screw passes through the baffle and is slidable relative to the baffle, and the second end of the adjusting screw is screwed with an adjusting nut, which is pressed tightly against the baffle.

[0024] Preferably, a fire extinguisher is provided on the melting tube, and the fire extinguisher is communicated with the melting tube.

[0025] Preferably, the fire extinguisher comprises a cylinder body and a top cover covering the cylinder body;

[0026] A general-purpose carbon dioxide gas cylinder is arranged in the cylinder, an exhaust port of the general-purpose gas cylinder is communicated with the melting pipe, and an electromagnetic valve is arranged at the exhaust port for controlling the exhaust of the exhaust port;

[0027] A pull-out switch is disposed in the cylinder, and the pull-out switch is electrically coupled to the solenoid valve.

[0028] Preferably, the pull switch comprises an upper power-on sheet, a plug sheet, a lower power-on sheet and a resisting spring, as well as a power-on column and a pull rope, which are arranged in the cylinder;

[0029] The upper power-on piece is fixed at the lower end of the cylinder body, the power-on column can be slidably arranged at the lower part of the upper power-on piece, a resistance spring is arranged between the upper end surface of the power-on column and the bottom surface of the upper power-on piece, the lower power-on piece is arranged below the power-on column, the lower power-on piece is fixed in the cylinder body and is arranged at a preset distance from the upper power-on piece, the lower power-on piece is used to connect to an external power supply, the first end of the plug is horizontally inserted between the power-on column and the lower power-on piece, the second end of the plug is exposed to the outside of the cylinder, one end of the pull rope is connected to the second end of the plug, and the other end is connected to the high-voltage insulating support.

[0030] According to a second aspect of the present invention, there is provided an intelligent drop-out fuse automatic switching control method, comprising:

[0031] The intelligent component detects the working status of the melting tube in real time and outputs the monitoring current;

[0032] The processing unit receives the monitoring current and feeds the monitoring current back to the control base station, and the control base station compares the monitoring current with the fuse current and the rated current, and determines the state of the fuse according to the comparison result;

[0033] According to the determination result of the fuse, a corresponding control instruction is sent to the execution component to control the connection or separation between the fusion tube and the push rod.

[0034] Preferably, the control base station compares the monitoring current with the fuse current and the rated current, and determines the state of the fuse according to the comparison result, including:

[0035] When the monitoring current is greater than the rated current and less than the fusing current, it is determined that the fuse of the fuse tube has a tendency to fusing;

[0036] When the monitoring current is within the normal rated current range, it is determined that the drop fuse is in a normal working state;

[0037] When the monitoring current value is 0, it is continued to determine whether there is smoke in the fuse tube. If it is determined that there is smoke in the fuse tube, it is determined that the fuse of the fuse tube is blown; if it is determined that there is no smoke in the fuse tube, it is determined that the fuse is in a disconnected state.

[0038] Compared with the prior art, the present invention has the following beneficial technical effects:

[0039] 1. The intelligent drop-out fuse and the automatic opening and closing control method in the first embodiment can make accurate autonomous and intelligent judgment on the melting and falling state of the fuse, and realize automatic opening and closing; when any one or two phases of the three-phase electricity of the fuse are in the melting and falling state, the other phase lines can be disconnected to ensure the stability of the operation of the power equipment; through automatic control, the timeliness of disconnection is realized, and the safety of the fuse operation is improved.

[0040] 2. The intelligent drop-out fuse in the second embodiment is convenient for pre-tightening the fuse after installation by setting a pre-tightening device on the lower contact bracket, so that the fuse is in a tensioned state, so that the pre-tightening torsion spring compressed by the elastic guide piece has a larger elastic force, and the fuse closing is more stable, which greatly reduces the occurrence of natural tripping; the elastic guide piece can ensure that the fuse is centered in the fuse tube, which is conducive to maintaining the consistency of the fuse's fusing characteristics, and avoids causing greater damage to the fuse tube when the fuse is blown, and is also conducive to the fuse automatically falling off from the fuse tube after it is blown. In this way, the technical problems of the inconvenience of tightening the fuse of the traditional fuse during installation and the poor centering effect of the fuse in the fuse tube of the traditional fuse are solved.

[0041] 3. The intelligent drop-out fuse in this embodiment is provided with a fire extinguisher on the fuse tube and an automatic trigger mechanism, so that when the fuse melts and causes the fuse tube to automatically fall, the fuse automatically triggers the solenoid valve to open, allowing the fire extinguishing agent in the fire extinguisher to enter the fuse tube to extinguish the fire. In this way, the occurrence of a safety hazard caused by the fuse burning and not being able to extinguish itself quickly when the fuse melts is avoided, and the safety of the circuit is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings.

[0043] Figure 1 A structural schematic diagram of the closing state of the intelligent drop-out fuse according to the first embodiment of the present invention is shown.

[0044] Figure 2 A structural schematic diagram of an open state of an intelligent drop-out fuse according to Embodiment 1 of the present invention is shown.

[0045] Figure 3 A schematic diagram of the three-dimensional structure of a fuse tube of an intelligent drop-out fuse according to the first embodiment of the present invention is shown.

[0046] Figure 4 A schematic diagram of the structure of an execution component according to the first embodiment of the present invention is shown.

[0047] Figure 5 A schematic structural diagram of a shedder combined with a pull ring according to Embodiment 1 of the present invention is shown.

[0048] Figure 6 A schematic structural diagram of the shedder and the pull ring being separated according to the first embodiment of the present invention is shown.

[0049] Figure 7-8 The schematic diagrams respectively show the structure of the automatic bullet block in two different states according to the first embodiment of the present invention.

[0050] Fig. 9 A flow chart of an automatic switching control method for an intelligent drop-out fuse according to Embodiment 1 of the present invention is shown.

[0051] Fig.10 A structural schematic diagram of the closing state of the intelligent drop-out fuse according to the second embodiment of the present invention is shown.

[0052] Fig.11 A schematic structural diagram of a fusion tube provided with a pre-tightening device according to a second embodiment of the present invention is shown.

[0053] Fig.12 Shows Fig.11 Enlarged view of part A in .

[0054] Fig.13 Shows Fig.12 Enlarged view of part B in .

[0055] Fig.14 A structural schematic diagram of a locking and adjusting assembly in a non-pretightened state according to Embodiment 2 of the present invention is shown.

[0056] Fig.15 A structural schematic diagram of a locking and adjusting assembly in a pre-tightened state according to Embodiment 2 of the present invention is shown.

[0057] Figure 16-18The schematic diagrams respectively show the structures of multiple states in the fuse pre-tightening process according to the second embodiment of the present invention.

[0058] Fig.19 A schematic structural diagram of the combination of a clamp body and a melting tube according to the second embodiment of the present invention is shown.

[0059] Fig. 20 A structural schematic diagram of a closed state of an intelligent drop-out fuse according to Embodiment 3 of the present invention is shown.

[0060] Fig.21 A structural schematic diagram of the open-gate drop state of the intelligent drop-out fuse according to the third embodiment of the present invention is shown.

[0061] Fig. 22 A schematic structural diagram of a combination of a melting tube and a fire extinguisher according to a third embodiment of the present invention is shown.

[0062] Fig.23 Shows Fig. 22 Enlarged view of part D in .

[0063] Fig.24 Shows Fig.23 Schematic diagram of the structure with the pull-out switch disconnected.

[0064] Fig.25 A schematic structural diagram of a fire extinguisher provided with a manual switch according to Embodiment 3 of the present invention is shown.

[0065] Figure 26-27 The schematic diagrams respectively show the structure of different connection states between the fire extinguisher and the melting tube according to the third embodiment of the present invention.

[0066] In the figure:

[0067] Upper contact bracket 100, lower contact bracket 200, collar joint 300, high-voltage insulating support 400, fuse tube 1, fuse 11, clamp body 12, actuator 2, guide rail box 21, slider 22, electromagnet 23, auxiliary spring 24, push rod 3, intelligent component 4, processing unit 5, shedder 6, bracket plate 61, automatic spring block 62, block 621, spring column 622, magnet 623, reset spring 624, drive magnet 625, connecting shaft 63, connecting torsion spring 64, push rod 7, preload device 8, locking adjustment component 81, lock body 8 11. Connecting block 812, connecting stud 813, locking nut 814, adjusting screw 815, adjusting nut 816, elastic guide piece 82, pre-tightening torsion spring 83, fire extinguisher 9, cylinder body 91, top cover 92, general purpose carbon dioxide gas cylinder 93, solenoid valve 94, pull-out switch 95, upper power-on piece 951, insert piece 952, lower power-on piece 953, resistance spring 954, power-on column 955, pull rope 956, manual switch 96, connecting pipe assembly 97, connecting outer pipe 971, connecting inner pipe 972, outer sleeve 973, screw nut 974. DETAILED DESCRIPTION

[0068] Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. In each of the accompanying drawings, the same elements are represented by the same or similar reference numerals. For the sake of clarity, the various parts in the accompanying drawings are not drawn to scale.

[0069] Embodiment 1:

[0070] like Figures 1 to 8As shown, this embodiment provides an intelligent drop-out fuse, which includes a fuse tube 1, an actuator 2, a push rod 73, an intelligent component 4 and a processing unit 5. The fuse tube 1 is provided with a fuse 11, the lower end of the fuse tube 1 can be rotatably arranged on the lower contact bracket 200, and the upper end is used to be combined with the upper contact bracket 100; the actuator 2 includes a guide rail box 21, a slider 22, an electromagnet 23 and an auxiliary spring 24, the guide rail box 21 is arranged on the upper contact bracket 100, the slider 22 can be slidably arranged in the guide rail box 21, and the electromagnets 23 are respectively arranged on opposite sides of the moving path of the slider 22 on the guide rail box 21, and each electromagnet 23 is sleeved with an auxiliary spring 24, and the auxiliary spring 24 is provided on the upper contact bracket 100. 4 is connected to the guide rail box at one end close to the corresponding electromagnet 23; a push rod 73, one end of the push rod 73 is rotatably connected to the slider 22, and the other end is rotatably connected to the melting tube 1, and the push rod 73 and the melting tube 1 are detachably connected; an intelligent component 4 is provided on the melting tube 1 and is used to detect the working state of the melting tube 1; a processing unit 5 is provided on the guide rail box 21 and is electrically connected to the intelligent component 4 and the execution component 2 respectively, and is used to receive the working state information of the intelligent component 4 and send an action instruction to the execution component 2.

[0071] In this embodiment, the electromagnet 23 can be powered from the high voltage side or the battery, or the current transformer. When the electromagnet 23 is energized, the slider 22 is driven to move to the right, and the slider 22 drives the push rod 73 to rotate the fuse tube 1 clockwise around the lower part of the fuse tube 1 until the slider 22 is located on the right side of the guide rail box 21, and the upper moving contact is separated from the upper static contact, thereby realizing the opening of the fuse; when the electromagnet 23 is energized, the slider 22 is driven to move to the left, and the slider 22 drives the push rod 73 to rotate the fuse tube 1 counterclockwise around the lower part of the fuse tube 1 until the slider 22 is located on the left side of the guide rail box 21, and the upper moving contact is in contact with the upper static contact, thereby realizing the closing of the fuse.

[0072] The upper end of the melting tube 1 is provided with a pull ring, and a shedder 6 is provided between the pull ring and the lower end of the push rod 73, and the pull ring and the push rod 73 are connected via the shedder 6; the shedder 6 includes two bracket plates 61, an automatic spring block 62, a connecting shaft 63 and a connecting torsion spring 64, the two bracket plates 61 are parallel to each other and are arranged at a preset distance, and the two ends of the connecting shaft 63 are respectively penetrated by a bracket plate 61 and rotatably connected to the bracket plate 61, and the two ends of the connecting shaft 63 are respectively sleeved with the connecting torsion spring 64, one leg of the connecting torsion spring 64 is fixed on the connecting shaft 63, and the other leg is fixed on the corresponding bracket plate 61, and each bracket plate 61 is provided with an automatic spring block 62 on one side away from the connecting shaft 63, and the two automatic spring blocks 62 are used in conjunction with each other to separate or combine with the pull ring. In this embodiment, the shedder 6 can be connected to the push rod 73 via its connecting shaft 63.

[0073] The automatic spring block 62 includes a block body 621, a spring column 622, a magnet 623, a return spring 624 and a driving magnet 625. The spring column 622 can be slidably passed through the block body 621. The driving magnet 625 is fixed to the end face of the first end of the block body 621. The first end of the spring column 622 can be slidably passed through the driving magnet 625. The second end of the spring column 622 passes through the block body 621 to form a spring tongue. The magnet 623 is arranged on the spring column 622 and is located between the driving magnet 625 and the spring tongue. The return spring 624 is arranged on the spring column 622 and is located between the driving magnet 625 and the spring tongue.

[0074] In this embodiment, there are two automatic spring blocks 62, which are symmetrically arranged on both sides of the pull ring of the melting tube 1. Each automatic spring block 62 is provided with a sliding groove, which extends from the first end face of the block 621 to the second end of the block 621 to a preset depth. The magnet 623 can be slidably arranged in the sliding groove, and the two ends of the reset spring 624 are respectively arranged on the magnet 623 and the electromagnet 23. When the driving magnet 625 is powered off, the magnet 623 pushes the spring tongue out of the second end face of the block 621 and penetrates into the pull ring of the melting tube 1 under the action of the spring force of the reset spring 624, thereby realizing the connection between the shedder 6 and the melting tube 1, and then realizing the connection between the melting tube 1 and the push rod 73. When the driving magnet 625 is powered on, the spring tongue retracts, and the automatic spring block 62 is separated from the pull ring, thereby realizing the separation of the melting tube 1 from the push rod 73.

[0075] like Fig. 9 As shown, this embodiment also discloses an intelligent drop-out fuse automatic opening and closing control method, comprising the following steps S1-S3:

[0076] S1), the intelligent component 4 detects the working status of the melting tube 1 in real time and outputs the monitoring current;

[0077] S2), the processing unit 5 receives the monitoring current and performs digital processing, and feeds back the monitoring current to the control base station, the control base station compares the monitoring current with the fuse current and the rated current, and determines the state of the fuse according to the comparison result;

[0078] This step specifically includes the following steps:

[0079] S21), the processing unit 5 receives the monitoring current and feeds back the monitoring current to the control base station;

[0080] S22), when the monitoring current is greater than the rated current and less than the fusing current, it is determined that the fuse 11 of the fuse tube 1 has a tendency to fusing;

[0081] S23), when the monitoring current is in the normal rated current interval, it is determined that the drop fuse is in a normal working state;

[0082] S24), when the monitoring current value is 0, it continues to determine whether there is smoke in the fuse tube 1. If it is determined that there is smoke in the fuse tube 1, it is determined that the fuse 11 of the fuse tube 1 is blown. If it is determined that there is no smoke in the fuse tube 1, it is determined that the fuse is in a disconnected state. At this time, the control execution component 2 disconnects the other two-phase circuits to achieve three-phase disconnection of the three-phase electricity; on the contrary, when the monitoring current value is 0 and the intelligent component 4 does not detect smoke, it is determined that the fuse is in a disconnected state; at this time, a maintenance alarm is issued.

[0083] S3), according to the determination result of the fuse, a corresponding control instruction is sent to the execution component 2 to control the connection or separation between the fusion tube 1 and the push rod 73.

[0084] This step specifically includes the following steps:

[0085] S31), if it is determined that the fuse 11 of the fusion tube 1 has a tendency to be blown, the processing unit 5 controls the actuator 2 to act, and the actuator 2 drives the push rod 73 to flip, so that the fusion tube 1 flips and is disconnected from the push rod 73, thereby realizing the free fall of the fusion tube 1;

[0086] S32), if it is determined that the drop fuse is in a normal working state, the processing unit 5 controls the execution component 2 not to act, so that the push rod 73 is connected to the pull ring of the fuse tube 1.

[0087] The intelligent drop-out fuse and automatic opening and closing control method in this embodiment can simultaneously make accurate autonomous and intelligent judgment on the blowing and dropping state of the fuse and realize automatic opening and closing; when any one or two phases of the three-phase electricity of the fuse are in the blowing and dropping state, the other phase lines can be disconnected to ensure the stability of the operation of the power equipment; through automatic control, the timeliness of disconnection is realized, and the safety of the fuse operation is improved.

[0088] Embodiment 2:

[0089] like Figures 10 to 19 As shown, the intelligent drop-out fuse in this embodiment, based on the first embodiment, further includes a pre-tightening device 8.

[0090] The pre-tightening device 8 includes a locking adjustment component 81, an elastic guide piece 82 and a pre-tightening torsion spring 83. The locking adjustment component 81 is connected to the lower end of the melting tube 1 via a sleeve joint 300; the elastic guide piece 82 is a curved structure, the first end of the elastic guide piece 82 is located at the lower end of the melting tube 1, the second end is connected to the lower contact bracket 200, and is arranged close to the locking adjustment component 81; the pre-tightening torsion spring 83 is arranged on the lower contact bracket 200, the first leg of which is fixed to the lower contact bracket 200, and the second leg is fixed to the elastic guide piece 82; the fuse 11 passes through the elastic guide piece 82 and is connected to the locking adjustment component 81, and is pre-tightened and fixed by the locking adjustment component 81.

[0091] The locking and adjusting assembly 81 includes a lock body 811, a connecting block 812, a connecting stud 813 and an adjusting screw 815. The lock body 811 includes a connecting plate and a baffle plate connected vertically to each other, and an adjusting slot is provided therein; the connecting block 812 is an L-shaped structure and can be slidably arranged in the adjusting slot; the connecting stud 813 is arranged on the connecting block 812 and has a locking nut 814 on the knob; the adjusting screw 815 has a first end connected to the connecting block 812, a second end passing through the baffle plate and slidable relative to the baffle plate, and an adjusting nut 816 is screwed on the second end of the adjusting screw 815, and the adjusting nut 816 is pressed against the baffle plate.

[0092] Furthermore, a wiring slot is provided on the connection plate to facilitate the arrangement and routing of the fuse 11 .

[0093] Referring to the figure, further, a clamp 12 is provided on the lower end surface of the melting tube 1, the clamp 12 is clamped at the lower end of the melting tube 1, the upper end of the elastic guide piece 82 is provided in the clamp 12, for example, a clamping opening is provided at the center of the clamp 12, the guide piece is clamped on the clamp 12 through the clamping opening, and the elastic guide piece 82 is provided with a guide groove along its extension direction for guiding and pre-tightening the fuse 11 to prevent the fuse 11 from slipping. By providing the clamp 12, on the one hand, the lower end surface of the melting tube 1 is sealed, and on the other hand, the upper end of the elastic guide piece 82 is positioned to prevent the elastic guide plate from tilting and excessive pre-tightening of the fuse 11.

[0094] In this embodiment, the collar joint 300 can be a curved elastic sheet structure, and the elastic guide plate can be specifically made of elastic. The elastic guide plate includes a first straight portion, a bent portion, and a second straight portion, and the first straight portion and the second straight portion are connected via the bent portion. In a natural state, the first straight portion and the second straight portion are substantially vertical. Further, the guide groove is opened on the second straight portion, and an enlarged portion is provided on the second straight portion, and the enlarged portion partially wraps the lower end of the lower contact bracket 200. The upper end of the first straight portion is positioned on the clamp 12, and the fuse 11 is wound around the first straight portion and then passed through the second straight portion, and is connected to the locking adjustment component 81.

[0095] See also Figures 14 to 18 When the pre-tightening device 8 in this embodiment is used, the installation and adjustment process of the fuse 11 can refer to the following steps:

[0096] 1. Pass the free end, i.e. the lower end, of the fuse 11 through the elastic guide piece 82, so that the fuse 11 bypasses and passes through the elastic guide piece 82;

[0097] 2. Wrap the lower end of the fuse 11 around the connecting stud 813. You can manually tighten the fuse 11 to fit against the guide sheet, and pre-tighten the locking nut 814 to fix the end of the fuse 11.

[0098] 3. Continue to tighten the fuse 11, so that the pre-tightening torsion spring 83 is compressed, and the second leg of the pre-tightening torsion spring 83 rotates around the axis of the torsion spring together with the elastic guide piece 82;

[0099] 4. Rotate the adjusting nut 816, and the connecting block 812 is pulled outward through the adjusting screw 815, and the fuse 11 is further pulled until the upper end of the elastic guide piece 82 is located at the axial position of the lower end of the fuse tube 1, thereby driving the fuse 11 to be tightened, increasing the pre-tightening force, and ensuring the stability of the closing. When the fuse 11 is tensioned, the fuse tube 1 and the pre-tightening device 8 form a whole and maintain a fixed angle. When the fuse 11 is blown, the fuse tube 1 can rotate relative to the pre-tightening device 8, and the fuse tube 1 falls under its own gravity.

[0100] The intelligent drop-out fuse in this embodiment is convenient for pre-tightening the fuse 11 after installation by arranging the pre-tightening device 8 on the lower contact support 200, so that the fuse 11 is in a tensioned state, so that the pre-tightening torsion spring 83 compressed by the elastic guide piece 82 has a larger elastic force, and the fuse closing is more stable, which greatly reduces the occurrence of natural opening; the elastic guide piece 82 can ensure that the fuse 11 is centered in the fuse tube 1, which is conducive to maintaining the consistency of the fusing characteristics of the fuse 11, and avoiding major damage to the fuse tube 1 when the fuse 11 is blown, and is also conducive to the automatic fall-off of the fuse 11 from the fuse tube 1 after the fuse 11 is blown. In this way, the technical problems of the inconvenience of tightening the fuse 11 of the traditional fuse during installation and the poor centering effect of the fuse 11 in the fuse tube 1 of the traditional fuse are solved.

[0101] Embodiment three:

[0102] like Figures 20 to 27 As shown, the intelligent drop-out fuse in this embodiment is further provided with a fire extinguisher 9 on the basis of the second embodiment.

[0103] The molten tube 1 is provided with a fire extinguisher 9, and the fire extinguisher 9 is connected to the molten tube 1. Specifically, a connecting pipe assembly 97 is provided between the fire extinguisher 9 and the molten tube 1, and the two are connected via a connecting pipe. The connecting pipe assembly 97 includes a connecting outer tube 971, a connecting inner tube 972, an outer sleeve 973 and a screw nut 974. The first end of the connecting outer tube 971 is connected to the fire extinguisher 9, the outer sleeve 973 is sealed and sleeved on the second end of the connecting outer tube 971, the outer sleeve 973 is slidably connected to the connecting outer tube 971, the first end of the connecting inner tube 972 is sealed and inserted into the second end of the connecting outer tube 971, the outer sleeve 973 is connected to the connecting inner tube 972, and the screw nut 974 is provided on the second end of the connecting inner tube 972. The outer sleeve 973 and the connecting outer tube 971 can be connected by threads, and the connecting tube assembly 97 can be connected to or disconnected from the melting tube 1 by rotating the screw nut 974 in forward and reverse directions, thereby realizing the connection or separation between the fire extinguisher 9 and the melting tube 1. The fire extinguisher 9 and the melting tube 1 are arranged in parallel, and the length of the connecting tube assembly 97 is adjustable, which facilitates the connection between the fire extinguisher 9 and the melting tube 1.

[0104] The fire extinguisher 9 includes a cylinder 91 and a top cover 92 covering the cylinder 91; a general carbon dioxide gas cylinder 93 is arranged in the cylinder 91, the exhaust port of the general gas cylinder is connected to the melting tube 1, and the exhaust port is provided with a solenoid valve 94 for controlling the exhaust of the exhaust port; a pull-out switch 95 is arranged in the cylinder 91, and the pull-out switch 95 is electrically coupled to the solenoid valve 94.

[0105] The pull-out switch 95 includes an upper power-on sheet 951, a plug sheet 952, a lower power-on sheet 953 and a resisting spring 954, as well as a power-on post 955 and a pull rope 956, which are arranged in the cylinder 91; the upper power-on sheet 951 is fixed to the lower end of the cylinder 91, the power-on post 955 is slidably arranged at the lower part of the upper power-on sheet 951, a resisting spring 954 is arranged between the upper end surface of the power-on post 955 and the bottom surface of the upper power-on sheet 951, and a The lower power-on sheet 953 is fixed in the cylinder 91 and is set at a preset distance from the upper power-on sheet 951. The lower power-on sheet 953 is used to connect to an external power source. The first end of the plug 952 is inserted horizontally between the power-on column 955 and the lower power-on sheet, and the second end of the plug 952 is exposed outside the cylinder 91. One end of the pull rope 956 is connected to the second end of the plug 952, and the other end is connected to the high-voltage insulating support 400. When the pull switch 95 is disconnected, the solenoid valve 94 is in a closed state, blocking the fire extinguishing agent in the fire extinguisher 9 from entering the melting tube 1; when the pull switch 95 is turned on, the solenoid valve 94 is in an open state, allowing the fire extinguishing agent in the fire extinguisher 9 to enter the melting tube 1.

[0106] In this embodiment, the tip of the first end of the plug 952 is a wedge-shaped structure, so that it can be inserted horizontally between the power-on column 955 and the lower power-on sheet; the lower end of the power-on column 955 is a hemispherical contact, and the wedge-shaped structure faces the hemispherical contact, so that the wedge-shaped structure can be inserted between the hemispherical contact and the lower power-on sheet 953.

[0107] Furthermore, a manual switch 96 is provided at the bottom of the cylinder 91, and the manual switch 96 is connected in series with the pull switch 95. When the fuse tube 1 needs to be pulled down manually, the manual switch 96 can be pressed first to disconnect the manual switch 96, and then the fuse tube 1 can be pulled down. When the fuse tube 1 is reset to a vertical state, the plug 952 is first located between the hemispherical contact and the lower power-on sheet, and then the manual switch 96 is adjusted to be turned on. When installing the fuse tube 1 with a fire extinguishing tube, the fuse tube 1 can be closed first to make the upper static contact contact with the upper moving contact, and then the other end of the pull rope 956 can be fixed to the bracket or the high-voltage insulating support 400. Before pulling down the fuse tube 1, the pull rope 956 can be removed from the bracket or the high-voltage insulating support 400.

[0108] The side wall of the fire extinguisher 9 is provided with a wiring groove, and a wiring terminal is provided inside the fire extinguisher 9, and the lead wires connecting the solenoid valve 94 and the pull-out switch 95 can be connected through the wiring terminal. During installation, after the fire extinguisher 9 is connected to the fire extinguisher 9, the lead wires on the side of the solenoid valve 94 are connected to the wiring terminal, which is convenient for wiring.

[0109] Furthermore, the fire extinguisher 9 may be provided with a battery for directly supplying power to the solenoid valve 94, or may be provided with a capacitor voltage division or a current transformer for supplying power from the high voltage side.

[0110] When the fuse 11 melts and causes the melting tube 1 to automatically fall, the fuse automatically triggers the electromagnetic valve 94 to open, allowing the fire extinguishing agent in the fire extinguisher 9 to enter the melting tube 1 to extinguish the fire.

[0111] The intelligent drop-out fuse in this embodiment is provided with a fire extinguisher 9 on the fuse tube 1 and an automatic trigger mechanism, so that when the fuse 11 melts and causes the fuse tube 1 to automatically fall, the fuse automatically triggers the electromagnetic valve 94 to open, so that the fire extinguishing agent in the fire extinguisher 9 enters the fuse tube 1 to extinguish the fire. In this way, the occurrence of a safety hazard caused by the failure of the fuse 11 to burn quickly and self-extinguish when the fuse 11 melts is avoided, and the safety of the circuit is greatly improved.

[0112] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0113] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. An intelligent drop-out fuse, characterized in that: include: A fuse tube, in which a fuse is arranged, wherein the lower end of the fuse tube can be rotatably arranged on the lower contact support, and the upper end of the fuse tube is used to be combined with the upper contact support; An actuator assembly, comprising a guide rail box, a slider, an electromagnet and an auxiliary spring, wherein the guide rail box is arranged on the upper contact bracket, the slider is slidably arranged in the guide rail box, an electromagnet is respectively arranged on opposite sides of the moving path of the slider on the guide rail box, each electromagnet is sleeved with an auxiliary spring, and one end of the auxiliary spring close to the corresponding electromagnet is connected to the guide rail box; A push rod, one end of which is rotatably connected to the slider, and the other end of which is rotatably connected to the melting tube, and the push rod and the melting tube are detachably connected; An intelligent component, arranged on the melting tube, for detecting the working state of the melting tube; The processing unit is arranged on the guide rail box and is electrically connected to the intelligent component and the execution component respectively, and is used for receiving the working state information of the intelligent component and issuing action instructions to the execution component.

2. The intelligent drop-out fuse according to claim 1, characterized in that: A pull ring is provided at the upper end of the fusion tube, a shedder is provided between the pull ring and the lower end of the push rod, and the pull ring and the push rod are connected via the shedder; The shedder includes two bracket plates, an automatic spring block, a connecting shaft and a connecting torsion spring. The two bracket plates are parallel to each other and are arranged at a preset distance. A bracket plate is respectively passed through the two ends of the connecting shaft and is rotatably connected to the bracket plates. The connecting torsion springs are respectively sleeved on the two ends of the connecting shaft. One leg of the connecting torsion spring is fixed on the connecting shaft, and the other leg is fixed on the corresponding bracket plate. An automatic spring block is respectively provided on one side of each bracket plate away from the connecting shaft. The two automatic spring blocks are used in combination to separate or combine with the pull ring.

3. The intelligent drop-out fuse according to claim 2, characterized in that: The automatic spring block includes a block, a spring column, a magnet, a reset spring and a driving magnet. The spring column can be slidably passed through the block. The driving magnet is fixed to the end face of the first end of the block. The first end of the spring column can be slidably passed through the driving magnet. The second end of the spring column passes through the block to form a spring tongue. The magnet is arranged on the spring column and is located between the driving magnet and the spring tongue. The reset spring is arranged on the spring column and is located between the magnet and the driving magnet.

4. The intelligent drop-out fuse according to claim 1, characterized in that: Also included is a pre-tightening device, the pre-tightening device comprising: A locking and adjusting assembly connected to the fusion tube via a sleeve joint; An elastic guide piece, which is a curved structure, wherein a first end of the elastic guide piece is located at the lower end of the melting tube, and a second end is connected to the lower contact support and is disposed close to the locking adjustment assembly; A pre-tightening torsion spring, arranged on the lower contact bracket, with a first leg fixed on the lower contact bracket and a second leg fixed on the elastic guide sheet; Wherein, the fuse passes through the elastic guide piece and is connected to the locking and adjusting component, and is pre-tightened and fixed by the locking and adjusting component.

5. The intelligent drop-out fuse according to claim 4, characterized in that: The locking and adjusting assembly comprises: The lock body comprises a connecting plate and a baffle plate which are vertically connected to each other and have an adjustment slot therein; A connecting block, which is an L-shaped structure and can be slidably disposed in the adjusting groove; A connecting stud, which is provided on the connecting block and has a locking nut on the knob; An adjusting screw, wherein the first end of the adjusting screw is connected to the connecting block, the second end of the adjusting screw passes through the baffle and is slidable relative to the baffle, and the second end of the adjusting screw is screwed with an adjusting nut, which is pressed tightly against the baffle.

6. The intelligent drop-out fuse according to claim 1, characterized in that: A fire extinguisher is arranged on the melting tube, and the fire extinguisher is communicated with the melting tube.

7. The intelligent drop-out fuse according to claim 6, characterized in that: The fire extinguisher comprises a cylinder body and a top cover covering the cylinder body; A general-purpose carbon dioxide gas cylinder is arranged in the cylinder, an exhaust port of the general-purpose gas cylinder is communicated with the melting pipe, and an electromagnetic valve is arranged at the exhaust port for controlling the exhaust of the exhaust port; A pull-out switch is provided in the cylinder, and the pull-out switch is electrically coupled to the solenoid valve.

8. The intelligent drop-out fuse according to claim 7, characterized in that: The pull-out switch comprises an upper power-on sheet, a plug sheet, a lower power-on sheet and a resisting spring, as well as a power-on column and a pull rope, which are arranged in the cylinder; The upper power-on piece is fixed at the lower end of the cylinder body, the power-on column can be slidably arranged at the lower part of the upper power-on piece, a resistance spring is arranged between the upper end surface of the power-on column and the bottom surface of the upper power-on piece, the lower power-on piece is arranged below the power-on column, the lower power-on piece is fixed in the cylinder body and is arranged at a preset distance from the upper power-on piece, the lower power-on piece is used to connect to an external power supply, the first end of the plug is horizontally inserted between the power-on column and the lower power-on piece, the second end of the plug is exposed to the outside of the cylinder, one end of the pull rope is connected to the second end of the plug, and the other end is connected to the high-voltage insulating support.

9. An intelligent drop-out fuse automatic opening and closing control method, characterized in that: include: The intelligent component detects the working status of the melting tube in real time and outputs the monitoring current; The processing unit receives the monitoring current and feeds the monitoring current back to the control base station, and the control base station compares the monitoring current with the fuse current and the rated current, and determines the state of the fuse according to the comparison result; According to the determination result of the fuse, a corresponding control instruction is sent to the execution component to control the connection or separation between the fusion tube and the push rod.

10. The intelligent automatic opening and closing control method of drop-out fuse according to claim 9, characterized in that: The control base station compares the monitoring current with the fuse current and the rated current, and determines the state of the fuse according to the comparison result, including: When the monitoring current is greater than the rated current and less than the fusing current, it is determined that the fuse of the fuse tube has a tendency to fusing; When the monitoring current is within the normal rated current range, it is determined that the drop fuse is in a normal working state; When the monitoring current value is 0, it is continued to determine whether there is smoke in the fuse tube. If it is determined that there is smoke in the fuse tube, it is determined that the fuse of the fuse tube is blown; if it is determined that there is no smoke in the fuse tube, it is determined that the fuse is in a disconnected state.

Images