Induction type magnetic blowout fuse

Abstract

The application relates to the technical field of current equipment, and discloses an inductive magnetic dynamic fuse, which comprises an insulating rod, the top of the insulating rod is fixedly connected with a waterproof cover, the top of the waterproof cover is fixedly connected with an upper wiring terminal, the bottom of the insulating rod is fixedly connected with an ear shaft sleeve, when a short-circuit fault occurs, the magnetic field intensity of an electromagnetic coil instantaneously increases, the magnetic field pushes down a spring rod, the electrically-conductive rod is separated from the energized rod, an electric arc is generated, the electric arc spreads to the right along the inclined surface at the top of the electrically-conductive rod, directly hits the quartz sand gathered at the bottom of the electromagnetic coil, high-efficiency arc extinguishing is realized through the quartz sand, the quartz sand is blocked through the separation sleeve, the contact area of the quartz sand and the electrically-conductive rod is reduced, the resistance of the quartz sand to the connecting rod and the electrically-conductive rod in the descending process is reduced, the electrically-conductive rod and the energized rod are rapidly separated, the loop is rapidly cut off, and the slow separation speed of the electrically-conductive rod and the energized rod is effectively prevented, so that the electric arc is prevented from continuously burning.

Description

Technical Field

[0001] This invention relates to the field of current equipment technology, specifically to an induction magnetic fuse. Background Technology

[0002] A fuse is an electrical device that breaks the circuit by melting a fusible element when the current exceeds a specified value. An induction-type magnetic fuse utilizes the magnetic effect of current: when a short circuit occurs, the huge short circuit current causes the built-in electromagnetic induction coil to instantly generate a strong magnetic field, driving the mechanical structure to quickly cut off the circuit. It can be used for current monitoring in the manufacturing process of power semiconductor tubes, transistor chips, and electronic components, providing critical short circuit protection.

[0003] When a drop-out fuse experiences a short circuit, the electromagnetic coil generates a strong magnetic force to cut off the circuit, and an electric arc is formed inside the insulating sleeve. Usually, quartz sand is filled in the insulating sleeve to absorb the energy of the electric arc. However, when the contacts separate, the quartz sand may increase the resistance to the movement of the contacts, slow down the movement speed of the contacts, and affect the rapid extinguishing of the electric arc. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides an inductive magnetic fuse, including an insulating rod, a waterproof cover fixedly connected to the top of the insulating rod, an upper terminal fixedly connected to the top of the waterproof cover, an trunnion sleeve fixedly connected to the bottom of the insulating rod, and a lower terminal fixedly connected to the bottom left side of the trunnion sleeve, and further comprising: An energizing mechanism is installed on the outer wall of the insulating rod, and the energizing mechanism includes a partition sleeve installed on the outer wall of the insulating rod; A separation mechanism is installed on the inner wall of the energizing mechanism. The separation mechanism includes a conductive rod that is slidably connected to the inner wall of the separator sleeve for connecting current. A buffer assembly is installed on the inner wall of the energizing mechanism, and the buffer assembly includes an energizing rod installed on the outer wall of the insulating rod; During use, the device is installed at an angle. After the operator connects the external lines to the upper and lower terminals respectively, the current will enter the upper terminal from the lines, pass through the waterproof cover, and flow through the power-conducting mechanism to the trunnion sleeve. Finally, the current will converge at the lower terminal and flow to the load below, completing the entire conductive circuit.

[0005] Preferably, the energizing mechanism further includes: A connecting component is installed on the outer wall of the insulating rod; Rotating assembly, which is installed on the inner wall of the trunnion sleeve.

[0006] Preferably, the separation mechanism further includes: Electromagnetic components are installed on the inner wall of the connecting components; An isolation component is installed on the inner wall of the connecting component.

[0007] Preferably, the buffer component includes: The sleeve component is installed on the inner wall of the connecting component; The pressure component is installed on the inner wall of the connecting component.

[0008] Preferably, the connecting assembly includes an insulating sleeve disposed on the outer wall of the insulating rod, and the bottom of the inner wall of the insulating sleeve is fixedly connected to the bottom of the partition sleeve; The inner wall of the waterproof cover is rotatably connected with a spring-loaded duck tongue, the bottom of the insulating sleeve is fixedly connected with a metal hoop, and the inside of the insulating sleeve is filled with quartz sand. The metal hoop is used to conduct current.

[0009] Preferably, the rotating assembly includes a rotating trunnion rotatably connected to the inner wall of the trunnion sleeve, and the bottom outer wall of the insulating sleeve is fixedly connected to the top of the rotating trunnion by a metal hoop; A spring is fixedly connected to the bottom of the inner wall of the trunnion sleeve, and the left side of the trunnion contacts the top of the spring when the trunnion is rotated. The spring is normally in a compressed state and is used to provide the initial power for the rotation of the insulating sleeve.

[0010] Preferably, the electromagnetic component includes an electromagnetic coil fixedly connected to the inner wall of the insulating sleeve, and a spring rod slidably connected to the inner wall of the insulating sleeve; The top of the electromagnetic coil contacts the bottom of the spring tongue, the bottom of the electromagnetic coil is fixedly connected to the top of the energized rod, and the bottom of the energized rod contacts the top of the conductive rod. The current flows through the waterproof cover, then sequentially through the spring duckbill, electromagnetic coil, energizing rod, conductive rod, separating sleeve, and the metal hoop at the bottom of the insulating sleeve. The current then flows through the rotating trunnion and trunnion sleeve through the metal hoop, and finally, the current converges at the lower terminal. When the current flows normally, the magnetic field generated in the electromagnetic coil is not strong enough to overcome the spring force of the spring rod. When a short circuit fault occurs, the current flowing in the electromagnetic coil will increase sharply, causing the magnetic field strength of the electromagnetic coil to rise instantaneously. The magnetic field will then push the spring rod down, allowing the spring rod to accumulate rebound force. Because the insulating sleeve is installed at an angle and the quartz sand inside the insulating sleeve is not completely filled, the quartz sand will accumulate towards the bottom of the electromagnetic coil.

[0011] Preferably, the isolation assembly includes a spring compression rod slidably connected to the inner wall of the insulating sleeve, wherein the outer wall of the spring compression rod is slidably connected to the inner wall of the spring rod; A connecting rod is fixedly connected to the bottom of the spring rod, and the right side of the connecting rod is fixedly connected to the top left side of the conductive rod. The spring compression rod is normally in a compressed state. The spring compression rod is made of ceramic, and the connecting rod is also made of ceramic. It is used to isolate the current. When the spring rod descends, it will drive the connecting rod to descend, causing the conductive rod to descend and separating the conductive rod from the bottom of the energized rod. As the current flows, it will move from the bottom of the energized rod to the right side of the conductive rod, allowing the current to flow to the straight position of the conductive rod. When the conductive rod separates from the energized rod, an electric arc will be generated. The electric arc will spread to the right along the sloping surface at the top of the conductive rod and directly hit the quartz sand gathered at the bottom of the electromagnetic coil. The quartz sand gathers on one side and quickly absorbs the arc energy to achieve efficient arc extinguishing. By using a separator sleeve to block the quartz sand, the contact area between the quartz sand and the conductive rod is reduced. The quartz sand gathers towards the bottom of the electromagnetic coil, reducing the amount of quartz sand at the connecting rod position. This reduces the resistance from the quartz sand encountered by the connecting rod and the conductive rod during their descent, thus enabling the conductive rod and the energized rod to separate quickly and the circuit to be cut off rapidly. This effectively prevents the conductive rod and the energized rod from separating too slowly, which could lead to the continued burning of the electric arc. When the conductive rod descends a sufficient distance, the top of the inner wall of the spring rod will contact the spring compression rod, thereby squeezing the spring compression rod to descend and releasing the compression limit of the spring duck tongue on the spring compression rod. At this time, since the spring piece is in a compressed state, the accumulated rebound force of the spring piece will be released, pushing the rotating trunnion to rotate, which in turn drives the insulating sleeve to rotate. With the insulating sleeve installed at an angle, the insulating sleeve will rotate rapidly due to its own weight, causing the top of the electromagnetic coil to separate from the spring duck tongue, causing the insulating sleeve to fall and achieving rapid disconnection of the current circuit. The rebound force of the spring compression rod will be released, allowing it to return to its original position.

[0012] Preferably, the sleeve assembly includes a blocking sleeve fixedly connected to the inner wall of the insulating sleeve, and a push rod slidably connected to the inner wall of the blocking sleeve, with the top of the push rod fixedly connected to the bottom of the connecting rod.

[0013] Preferably, the pressing assembly includes a collecting sleeve fixedly connected to the inner wall of the insulating sleeve, and a limiting sleeve slidably connected to the inner wall of the collecting sleeve; The outer wall of the push rod is fixedly connected to the inner wall of the collecting sleeve, and the outer wall of the collecting sleeve is slidably connected to the inner wall of the blocking sleeve. When the connecting rod descends, it will drive the push rod and the limiting sleeve to descend as well. Since some quartz sand is pre-accumulated on the top of the limiting sleeve, when the limiting sleeve descends, the quartz sand will flow into the collecting sleeve. It will contact the inner wall of the collecting sleeve through the outer wall of the blocking sleeve, and the inner wall of the blocking sleeve will contact the outer wall of the push rod. This will separate the quartz sand from the outer wall of the push rod and the limiting sleeve, so that the push rod and the limiting sleeve will experience less resistance during the descent process. When the conductive rod and the energized rod separate and complete the arc extinguishing, the magnetic field strength generated by the electromagnetic coil will weaken, the pushing force on the spring rod will weaken, and the rebound force of the spring rod will be released, allowing it to return to its original position. The top of the limiting sleeve accumulates a lot of quartz sand. As the limiting sleeve rises, it pushes the quartz sand to move. Due to the poor fluidity of the quartz sand, it needs to overcome a large amount of friction and extrusion, which increases the upward resistance of the limiting sleeve and slows down the return speed of the limiting sleeve, push rod, connecting rod, and spring rod. This allows the spring rod to return slowly, effectively preventing the spring rod from quickly returning after the energized rod and conductive rod separate, causing the conductive rod to come into contact with the energized rod again, which would make the circuit connected. At this time, the top of the electromagnetic coil has not yet fully separated from the spring tongue, resulting in an insufficient gap between the two. This causes an electric arc to be generated at the top of the electromagnetic coil and spread to the outside, affecting the safety of the circuit breaker.

[0014] The present invention has the following beneficial effects: (1) When using this invention, the device is installed at an angle. When a short circuit occurs, the magnetic field strength of the electromagnetic coil increases instantaneously, and the magnetic field will push the spring rod down. Since the insulating sleeve is installed at an angle and the quartz sand inside the insulating sleeve is not completely filled, the quartz sand will gather towards the bottom of the electromagnetic coil. When the spring rod descends, it will cause the conductive rod to descend and separate from the bottom of the energized rod, which will generate an electric arc. The electric arc spreads to the right along the inclined surface at the top of the conductive rod and directly hits the quartz sand gathered at the bottom of the electromagnetic coil. The quartz sand achieves efficient arc extinguishing. The separator sleeve blocks the quartz sand, reduces the contact area between the quartz sand and the conductive rod, and reduces the resistance of the quartz sand encountered by the connecting rod and the conductive rod during the descent. This achieves rapid separation of the conductive rod and the energized rod, and rapid circuit cut-off. It effectively prevents the electric arc from continuing to burn if the separation speed of the conductive rod and the energized rod is too slow.

[0015] (2) In this invention, when the connecting rod descends, it will drive the push rod and the limiting sleeve to descend. Since some quartz sand is pre-gathered on the top of the limiting sleeve, when the magnetic field strength generated by the electromagnetic coil weakens, the spring rod will release its rebound force, causing it to return to its original position. The limiting sleeve will rise and push the quartz sand to move. Since the quartz sand has poor fluidity, it needs to overcome a large friction and squeezing force, which will increase the upward resistance of the limiting sleeve and slow down the return speed of the spring rod. This effectively prevents the spring rod from quickly returning to its original position after the energized rod and the conductive rod are separated, causing the conductive rod to contact the energized rod again, which would make the circuit connected. At this time, the top of the electromagnetic coil has not been fully separated from the spring tongue, resulting in a small gap between the two, causing an electric arc to be generated on the top of the electromagnetic coil and spread to the outside, affecting the safety of the circuit breaker.

[0016] (3) In this invention, since some quartz sand is gathered at the top of the limiting sleeve, when the limiting sleeve descends, it will be affected by the weight of the quartz sand at the top of the limiting sleeve, which will form an additional downward thrust, accelerate the descent speed of the limiting sleeve, thereby accelerating the descent speed of the push rod, connecting rod and conductive rod. The magnetic thrust generated by the electromagnetic coil will accelerate the separation speed of the energized rod and the conductive rod, further accelerating the circuit breaking speed.

[0017] (4) In this invention, when the power supply needs to be restored after the line maintenance is completed, the operator will use tools to push the insulating sleeve and the rotating ear shaft to rotate in the direction of the spring duck tongue. When the insulating sleeve rotates and falls, the quartz sand inside will flow and change the position of the quartz sand, causing the quartz sand to flow towards the bottom of the spring rod. During the process of pushing the insulating sleeve back into place, the quartz sand will move towards the bottom of the inner wall of the insulating sleeve. Through the automatic flow of quartz sand during each disconnection and return process, the quartz sand accumulated at the bottom of the electromagnetic coil will be automatically rotated, effectively preventing some quartz sand from being sintered by high temperature due to long-term exposure to electric arc burning, reducing the arc extinguishing effect, thereby keeping the quartz sand in a loose particle state for a long time and maintaining good arc extinguishing performance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic cross-sectional view of the insulating sleeve of the present invention; Figure 5 This is a cross-sectional view of the spring rod of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle; Figure 7 This is a schematic cross-sectional view of the separator sleeve of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of point C in the middle; Figure 9 This is a schematic diagram of the working process of the insulating sleeve of the present invention; Figure 10 This is a schematic diagram of the insulated rod tilting according to the present invention.

[0020] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Energizing mechanism; 11. Connecting assembly; 12. Rotating assembly; 13. Insulating rod; 14. Waterproof cover; 15. Upper terminal; 16. Trunnion sleeve; 17. Lower terminal; 101. Separating sleeve; 111. Insulating sleeve; 112. Spring tongue; 121. Rotating trunnion; 122. Spring piece; 2. Separating mechanism; 21. Electromagnetic assembly; 22. Isolation assembly; 201. Conductive rod; 211. Electromagnetic coil; 212. Spring rod; 221. Spring compression rod; 222. Connecting rod; 3. Buffer assembly; 31. Sleeve assembly; 32. Pressing assembly; 301. Energizing rod; 311. Blocking sleeve; 312. Push rod; 321. Collecting sleeve; 322. Limiting sleeve. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1, please refer to Figures 1-7 This invention relates to an inductive magnetic fuse, comprising an insulating rod 13, a waterproof cover 14 fixedly connected to the top of the insulating rod 13, an upper terminal 15 fixedly connected to the top of the waterproof cover 14, an trunnion sleeve 16 fixedly connected to the bottom of the insulating rod 13, and a lower terminal 17 fixedly connected to the bottom left side of the trunnion sleeve 16. The invention also includes: The energizing mechanism 1 is installed on the outer wall of the insulating rod 13. The energizing mechanism 1 includes a partition sleeve 101 installed on the outer wall of the insulating rod 13. Separation mechanism 2 is installed on the inner wall of energizing mechanism 1. Separation mechanism 2 includes a conductive rod 201 that is slidably connected to the inner wall of separator sleeve 101 for connecting current. The buffer assembly 3 is installed on the inner wall of the energizing mechanism 1. The buffer assembly 3 includes an energizing rod 301 installed on the outer wall of the insulating rod 13. During use, the device is installed at an angle, such as... Figure 10 As shown, after the operator connects the external line to the upper terminal 15 and the lower terminal 17 respectively, the current will enter the upper terminal 15 from the line, pass through the waterproof cover 14, and flow through the power-conducting mechanism 1 to the trunnion sleeve 16. Finally, the current will converge at the lower terminal 17 and flow to the load below, completing the entire conductive circuit.

[0023] The power supply mechanism 1 also includes: Connection component 11 is installed on the outer wall of insulating rod 13; Rotating assembly 12 is installed on the inner wall of trunnion sleeve 16.

[0024] Separation mechanism 2 also includes: Electromagnetic component 21 is installed on the inner wall of connecting component 11; Isolation component 22 is installed on the inner wall of connection component 11.

[0025] Buffer component 3 includes: The sleeve component 31 is installed on the inner wall of the connecting component 11; The pressing component 32 is installed on the inner wall of the connecting component 11.

[0026] Example 2, please refer to Figures 3-10 The present invention is an inductive magnetic fuse. Based on the first embodiment, the connecting assembly 11 includes an insulating sleeve 111 disposed on the outer wall of the insulating rod 13, and the bottom of the inner wall of the insulating sleeve 111 is fixedly connected to the bottom of the partition sleeve 101. The inner wall of the waterproof cover 14 is rotatably connected to a spring duck tongue 112, the bottom of the insulating sleeve 111 is fixedly connected to a metal hoop, and the interior of the insulating sleeve 111 is filled with quartz sand. The metal hoop is used to conduct current.

[0027] The rotating assembly 12 includes a rotating trunnion 121 rotatably connected to the inner wall of the trunnion sleeve 16, and the bottom outer wall of the insulating sleeve 111 is fixedly connected to the top of the rotating trunnion 121 by a metal hoop. A spring piece 122 is fixedly connected to the bottom of the inner wall of the trunnion sleeve 16, and the left side of the trunnion 121 contacts the top of the spring piece 122 when the trunnion 121 is rotated. Among them, the spring piece 122 is normally in a compressed state and is used to provide the initial power for the rotation of the insulating sleeve 111.

[0028] The electromagnetic component 21 includes an electromagnetic coil 211 fixedly connected to the inner wall of the insulating sleeve 111, and a spring rod 212 slidably connected to the inner wall of the insulating sleeve 111. The top of the electromagnetic coil 211 contacts the bottom of the spring duck tongue 112, the bottom of the electromagnetic coil 211 is fixedly connected to the top of the energized rod 301, and the bottom of the energized rod 301 contacts the top of the conductive rod 201. The current passes through the waterproof cover 14, and then flows sequentially through the spring duck tongue 112, the electromagnetic coil 211, the energizing rod 301, the conductive rod 201, the separating sleeve 101, and the metal hoop at the bottom of the insulating sleeve 111. The current then flows through the rotating trunnion 121 and the trunnion sleeve 16 through the metal hoop, and finally, the current converges at the lower terminal 17. When current flows normally, the magnetic field generated in the electromagnetic coil 211 is insufficient to overcome the spring force of the spring rod 212. When a short circuit occurs, the current flowing through the electromagnetic coil 211 increases sharply, causing the magnetic field strength to rise instantaneously. This magnetic field then pushes the spring rod 212 downwards, allowing it to accumulate restoring force. Because the insulating sleeve 111 is installed at an angle and the quartz sand inside is not completely filled, the quartz sand will accumulate towards the bottom of the electromagnetic coil 211. Figure 7 The position of G in the middle is shown.

[0029] The isolation assembly 22 includes a spring compression rod 221 that is slidably connected to the inner wall of the insulating sleeve 111, and the outer wall of the spring compression rod 221 is slidably connected to the inner wall of the spring rod 212; A connecting rod 222 is fixedly connected to the bottom of the spring rod 212, and the right side of the connecting rod 222 is fixedly connected to the top left side of the conductive rod 201. The spring compression rod 221 is normally in a compressed state. Both the spring compression rod 221 and the connecting rod 222 are made of ceramic and are used to isolate current. When the spring rod 212 descends, it causes the connecting rod 222 to descend, leading to the descent of the conductive rod 201. This causes the conductive rod 201 to separate from the bottom of the energized rod 301. As current flows, it moves from the bottom of the energized rod 301 towards the right side of the conductive rod 201, allowing current to flow to the straight section of the conductive rod 201. Figure 7 As shown in the position of H, when the conductive rod 201 separates from the energized rod 301, an electric arc will be generated. The electric arc spreads to the right along the inclined surface at the top of the conductive rod 201 and directly hits the quartz sand gathered at the bottom of the electromagnetic coil 211. The quartz sand gathers on one side and quickly absorbs the electric arc energy to achieve efficient arc extinguishing. By blocking the quartz sand with the separator sleeve 101, the contact area between the quartz sand and the conductive rod 201 is reduced. The quartz sand gathers towards the bottom of the electromagnetic coil 211, reducing the amount of quartz sand at the position of the connecting rod 222. This reduces the resistance of the quartz sand encountered by the connecting rod 222 and the conductive rod 201 during their descent, thereby enabling the conductive rod 201 to quickly separate from the energized rod 301 and quickly cut off the circuit. This effectively prevents the electric arc from continuing to burn if the separation speed of the conductive rod 201 and the energized rod 301 is too slow. When the conductive rod 201 descends a sufficient distance, the top of the inner wall of the spring rod 212 contacts the spring compression rod 221, thereby compressing the spring compression rod 221 to descend and releasing the compression limit of the spring duck tongue 112 on the spring compression rod 221. At this time, since the spring piece 122 is in a compressed state, the accumulated rebound force of the spring piece 122 will be released, pushing the rotating trunnion 121 to rotate, driving the insulating sleeve 111 to rotate. With the insulating sleeve 111 installed at an angle, under the influence of its own weight, the insulating sleeve 111 will rotate rapidly, causing the top of the electromagnetic coil 211 to separate from the spring duck tongue 112, causing the insulating sleeve 111 to fall, thus achieving rapid disconnection of the current circuit. Figure 9 As shown, the spring force of the spring compression rod 221 will be released, causing it to return to its original position.

[0030] The sleeve assembly 31 includes a blocking sleeve 311 fixedly connected to the inner wall of the insulating sleeve 111. A push rod 312 is slidably connected to the inner wall of the blocking sleeve 311. The top of the push rod 312 is fixedly connected to the bottom of the connecting rod 222.

[0031] The pressing assembly 32 includes a collecting sleeve 321 fixedly connected to the inner wall of the insulating sleeve 111, and a limiting sleeve 322 slidably connected to the inner wall of the collecting sleeve 321. The outer wall of the push rod 312 is fixedly connected to the inner wall of the collecting sleeve 321, and the outer wall of the collecting sleeve 321 is slidably connected to the inner wall of the blocking sleeve 311. When the connecting rod 222 descends, it will drive the push rod 312 and the limiting sleeve 322 to descend. Since some quartz sand is pre-gathered on the top of the limiting sleeve 322, when the limiting sleeve 322 descends, the quartz sand will flow into the collecting sleeve 321. It will contact the inner wall of the collecting sleeve 321 through the outer wall of the blocking sleeve 311, and the inner wall of the blocking sleeve 311 will contact the outer wall of the push rod 312. This will separate the quartz sand from the outer wall of the push rod 312 and the limiting sleeve 322, so that the resistance encountered by the push rod 312 and the limiting sleeve 322 during the descent process is small. When the conductive rod 201 and the energized rod 301 separate and complete the arc extinguishing, the magnetic field strength generated by the electromagnetic coil 211 will weaken, the pushing force on the spring rod 212 will weaken, and the rebound force of the spring rod 212 will be released, so that it returns to its original position. The top of the limiting sleeve 322 accumulates a large amount of quartz sand. As the limiting sleeve 322 rises, it pushes the quartz sand to move. Due to the poor fluidity of the quartz sand, it needs to overcome a large amount of friction and extrusion, which increases the upward resistance of the limiting sleeve 322 and slows down the return speed of the limiting sleeve 322, push rod 312, connecting rod 222 and spring rod 212. This allows the spring rod 212 to return slowly, effectively preventing the spring rod 212 from quickly returning after the energized rod 301 separates from the conductive rod 201, causing the conductive rod 201 to contact the energized rod 301 again, which would make the circuit connected. At this time, the top of the electromagnetic coil 211 has not yet fully separated from the spring tongue 112, resulting in an insufficient distance between the two. This causes an electric arc to be generated on the top of the electromagnetic coil 211 and spread to the outside, affecting the safety of the circuit breaker.

[0032] One specific application of this embodiment is: when using this invention, the device is installed at an angle, such as... Figure 10 As shown, after the operator connects the external line to the upper terminal 15 and the lower terminal 17 respectively, the current in the line will flow through the upper terminal 15 to the waterproof cover 14, and then through the waterproof cover 14 to the spring duck tongue 112, the electromagnetic coil 211, the energizing rod 301, the conductive rod 201, the separator sleeve 101 and the metal hoop at the bottom of the insulating sleeve 111. The current flows through the metal hoop to the rotating trunnion 121 and the trunnion sleeve 16. Finally, the current converges at the lower terminal 17 and flows to the load below, completing the entire conductive circuit. When current flows normally, the magnetic field generated in the electromagnetic coil 211 is insufficient to overcome the spring force of the spring rod 212. When a short circuit occurs, the current flowing through the electromagnetic coil 211 increases sharply, causing the magnetic field strength to rise instantaneously. This magnetic field then pushes the spring rod 212 downwards, allowing it to accumulate restoring force. Because the insulating sleeve 111 is installed at an angle and the quartz sand inside is not completely filled, the quartz sand will accumulate towards the bottom of the electromagnetic coil 211. Figure 7 The position of G in the middle is shown; When the spring rod 212 descends, it will cause the connecting rod 222 to descend, causing the conductive rod 201 to descend and separate from the bottom of the energized rod 301. As current flows, it will move from the bottom of the energized rod 301 towards the right side of the conductive rod 201, allowing the current to flow to the straight position of the conductive rod 201. Figure 7 As shown in the position of H, when the conductive rod 201 separates from the energized rod 301, an electric arc will be generated. The electric arc spreads to the right along the inclined surface at the top of the conductive rod 201 and directly hits the quartz sand gathered at the bottom of the electromagnetic coil 211. The quartz sand gathers on one side and quickly absorbs the electric arc energy to achieve efficient arc extinguishing. By blocking the quartz sand with the separator sleeve 101, the contact area between the quartz sand and the conductive rod 201 is reduced. The quartz sand gathers towards the bottom of the electromagnetic coil 211, reducing the amount of quartz sand at the position of the connecting rod 222. This reduces the resistance of the quartz sand encountered by the connecting rod 222 and the conductive rod 201 during their descent, thereby enabling the conductive rod 201 to quickly separate from the energized rod 301 and quickly cut off the circuit. This effectively prevents the electric arc from continuing to burn if the separation speed of the conductive rod 201 and the energized rod 301 is too slow. When the conductive rod 201 descends a sufficient distance, the top of the inner wall of the spring rod 212 contacts the spring compression rod 221, thereby compressing the spring compression rod 221 to descend and releasing the compression limit of the spring duck tongue 112 on the spring compression rod 221. At this time, since the spring piece 122 is in a compressed state, the accumulated rebound force of the spring piece 122 will be released, pushing the rotating trunnion 121 to rotate, driving the insulating sleeve 111 to rotate. With the insulating sleeve 111 installed at an angle, under the influence of its own weight, the insulating sleeve 111 will rotate rapidly, causing the top of the electromagnetic coil 211 to separate from the spring duck tongue 112, causing the insulating sleeve 111 to fall, thus achieving rapid disconnection of the current circuit. Figure 9 As shown, the spring force of the spring compression rod 221 will be released, causing it to return to its original position; When the connecting rod 222 descends, it will drive the push rod 312 and the limiting sleeve 322 to descend. Since some quartz sand is pre-gathered at the top of the limiting sleeve 322, when the limiting sleeve 322 descends, the quartz sand will flow into the collecting sleeve 321. It will contact the inner wall of the collecting sleeve 321 through the outer wall of the blocking sleeve 311, and the inner wall of the blocking sleeve 311 will contact the outer wall of the push rod 312. This will separate the quartz sand from directly contacting the outer walls of the push rod 312 and the limiting sleeve 322, so that the resistance encountered by the push rod 312 and the limiting sleeve 322 during the descent process is small. When the conductive rod 201 and the energized rod 301 separate and complete the arc extinguishing, the magnetic field strength generated by the electromagnetic coil 211 will weaken, the pushing force on the spring rod 212 will weaken, and the rebound force of the spring rod 212 will be released, so that it returns to its original position. The top of the limiting sleeve 322 accumulates a lot of quartz sand. When the limiting sleeve 322 rises, it pushes the quartz sand to move. Due to the poor fluidity of the quartz sand, it needs to overcome a large friction and extrusion force, which increases the upward resistance of the limiting sleeve 322 and slows down the return speed of the limiting sleeve 322, push rod 312, connecting rod 222 and spring rod 212. This allows the spring rod 212 to return slowly, effectively preventing the spring rod 212 from quickly returning after the energized rod 301 separates from the conductive rod 201, causing the conductive rod 201 to contact the energized rod 301 again, which would make the circuit connected. At this time, the top of the electromagnetic coil 211 has not yet fully separated from the spring tongue 112, resulting in a small gap between the two. This causes an electric arc to be generated on the top of the electromagnetic coil 211 and spread to the outside, affecting the safety of the circuit breaker. Because some quartz sand accumulates at the top of the limiting sleeve 322, when the limiting sleeve 322 descends, the weight of the quartz sand at the top of the limiting sleeve 322 will create an additional downward thrust, accelerating the descent speed of the limiting sleeve 322. This, in turn, accelerates the descent speed of the push rod 312, connecting rod 222, and conductive rod 201. The magnetic thrust generated by the electromagnetic coil 211, combined with this, will accelerate the separation speed of the energized rod 301 and the conductive rod 201, further accelerating the circuit breaking speed. When power needs to be restored after line maintenance, the operator will use tools to push the insulating sleeve 111 and the rotating trunnion 121 towards the spring tongue 112 until the spring compression rod 221 contacts the spring tongue 112. The spring tongue 112 will then compress the spring compression rod 221, causing it to descend and accumulate rebound force, providing support for the insulating sleeve 111. This will cause the top of the electromagnetic coil 211 to contact the bottom of the spring tongue 112 again. During the rotation of the rotating trunnion 121 back to its original position, it will also contact the spring piece 122. Figure 3 As shown in position E, this compresses the spring 122, putting it into a compressed state. When the insulating sleeve 111 rotates and falls, the quartz sand inside it will flow and change its position, causing the quartz sand to flow towards the bottom of the spring rod 212. During the process of pushing the insulating sleeve 111 back to its original position, the quartz sand will move towards the bottom of the inner wall of the insulating sleeve 111. Through the automatic flow of quartz sand during each breaking and returning process, the quartz sand accumulated at the bottom of the electromagnetic coil 211 will be automatically rotated, effectively preventing some quartz sand from being sintered by high temperature due to long-term exposure to electric arc, which would reduce the arc extinguishing effect. This allows the quartz sand to remain in a loose particle state for a long time, maintaining good arc extinguishing performance. When the insulating sleeve 111 rotates and its falling angle is too large, the quartz sand flows towards the bottom of the spring rod 212. During this process, the quartz sand at the top of the limiting sleeve 322 will loosen, which will reduce the moving resistance of the limiting sleeve 322 and allow the spring rod 212 to return to its original position smoothly. This effectively prevents excessive quartz sand from filling the top of the limiting sleeve 322, which would cause excessive resistance and make it difficult for the spring rod 212 to return to its original position, affecting the contact between the conductive rod 201 and the energized rod 301, and affecting the establishment of the next circuit.

[0033] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An inductive magnetic fuse, comprising an insulating rod (13), a waterproof cover (14) fixedly connected to the top of the insulating rod (13), an upper terminal (15) fixedly connected to the top of the waterproof cover (14), an trunnion sleeve (16) fixedly connected to the bottom of the insulating rod (13), and a lower terminal (17) fixedly connected to the bottom left side of the trunnion sleeve (16), characterized in that, Also includes: The power supply mechanism (1) is installed on the outer wall of the insulating rod (13), and the power supply mechanism (1) includes a partition sleeve (101) installed on the outer wall of the insulating rod (13). Separation mechanism (2), which is installed on the inner wall of the energizing mechanism (1), includes a conductive rod (201) slidably connected to the inner wall of the separator sleeve (101) for connecting current; The buffer assembly (3) is installed on the inner wall of the energizing mechanism (1), and the buffer assembly (3) includes an energizing rod (301) installed on the outer wall of the insulating rod (13). In use, the current enters the upper terminal (15) from the line, passes through the waterproof cover (14), and flows through the power-conducting mechanism (1) to the trunnion sleeve (16). Finally, the current gathers at the lower terminal (17) and flows to the load below, completing the entire conductive circuit.

2. The inductive magnetic fuse according to claim 1, characterized in that: The energizing mechanism (1) further includes: A connecting assembly (11) is installed on the outer wall of the insulating rod (13); Rotating assembly (12) is mounted on the inner wall of trunnion sleeve (16).

3. The inductive magnetic fuse according to claim 2, characterized in that: The separation mechanism (2) further includes: An electromagnetic component (21) is installed on the inner wall of the connecting component (11); An isolation component (22) is installed on the inner wall of the connecting component (11).

4. The inductive magnetic fuse according to claim 3, characterized in that: The buffer component (3) includes: A sleeve assembly (31) is installed on the inner wall of the connecting assembly (11); A pressing component (32) is installed on the inner wall of the connecting component (11).

5. An inductive magnetic fuse according to claim 4, characterized in that: The connecting assembly (11) includes an insulating sleeve (111) disposed on the outer wall of the insulating rod (13), and the bottom of the inner wall of the insulating sleeve (111) is fixedly connected to the bottom of the partition sleeve (101). The inner wall of the waterproof cover (14) is rotatably connected to a spring duck tongue (112), the bottom of the insulating sleeve (111) is fixedly connected to a metal hoop, and the interior of the insulating sleeve (111) is filled with quartz sand. The current flows through the waterproof cover (14) and then to the spring duck tongue (112).

6. An inductive magnetic fuse according to claim 5, characterized in that: The rotating assembly (12) includes a rotating trunnion (121) rotatably connected to the inner wall of the trunnion sleeve (16), and the bottom outer wall of the insulating sleeve (111) is fixedly connected to the top of the rotating trunnion (121) by a metal hoop. The bottom of the inner wall of the trunnion sleeve (16) is fixedly connected to a spring piece (122), and the left side of the rotating trunnion (121) contacts the top of the spring piece (122).

7. An inductive magnetic fuse according to claim 5, characterized in that: The electromagnetic component (21) includes an electromagnetic coil (211) fixedly connected to the inner wall of the insulating sleeve (111), and a spring rod (212) is slidably connected to the inner wall of the insulating sleeve (111). The top of the electromagnetic coil (211) is in contact with the bottom of the spring duck tongue (112), the bottom of the electromagnetic coil (211) is fixedly connected to the top of the energized rod (301), and the bottom of the energized rod (301) is in contact with the top of the conductive rod (201). The current flows through the spring duck tongue (112) and then sequentially through the electromagnetic coil (211), the energizing rod (301), the conductive rod (201), the separator sleeve (101), and the metal hoop at the bottom of the insulating sleeve (111). It then flows through the metal hoop to the trunnion sleeve (16) and finally to the lower terminal (17).

8. An inductive magnetic fuse according to claim 7, characterized in that: The isolation assembly (22) includes a spring compression rod (221) slidably connected to the inner wall of the insulating sleeve (111), the outer wall of the spring compression rod (221) being slidably connected to the inner wall of the spring rod (212); The bottom of the spring rod (212) is fixedly connected to a connecting rod (222), and the right side of the connecting rod (222) is fixedly connected to the top left side of the conductive rod (201). When a short circuit occurs, the current flowing through the electromagnetic coil (211) will increase sharply, which will increase the magnetic field generated, and push the spring rod (212) down, which will drive the connecting rod (222) and the conductive rod (201) down, so that the top of the conductive rod (201) separates from the bottom of the electromagnetic coil (211) to break the circuit.

9. An inductive magnetic fuse according to claim 8, characterized in that: The sleeve assembly (31) includes a blocking sleeve (311) fixedly connected to the inner wall of the insulating sleeve (111), and a push rod (312) is slidably connected to the inner wall of the blocking sleeve (311). The top of the push rod (312) is fixedly connected to the bottom of the connecting rod (222).

10. An inductive magnetic fuse according to claim 9, characterized in that: The pressing assembly (32) includes a collecting sleeve (321) fixedly connected to the inner wall of the insulating sleeve (111), and a limiting sleeve (322) is slidably connected to the inner wall of the collecting sleeve (321). The outer wall of the push rod (312) is fixedly connected to the inner wall of the collecting sleeve (321), and the outer wall of the collecting sleeve (321) is slidably connected to the inner wall of the blocking sleeve (311). When the push rod (312) descends, it will cause the limiting sleeve (322) to descend, and the quartz sand in the insulating sleeve (111) will flow into the collecting sleeve (321).

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