An intelligent fuse

Abstract

The present invention provides an intelligent fuse, which relates to the technical field of power maintenance. It is provided with a static contact matching the connecting arm, and an elastic arm is fixedly connected to the top of the insulating seat; it also includes an insulating support and a fuse tube. The bottom of the insulating support is fixedly connected with a connecting arm, and the bottom of the fuse tube also includes a fusing element, a winding assembly, a wire feeding assembly, a clamping assembly and an actuating mechanism; through the settings of the wire feeding assembly, the actuating mechanism, the clamping assembly and the reset mechanism, when the staff performs wire replacement and reset operations on the high-drop fuse on the ground, they only need to push the connecting ring upward through the insulating rod to make the residual fuse of the fuse fall off, and then push the fuse tube to reset again. There is no need for the staff to perform cumbersome operations on the fuse tube and the fuse wire. Especially for large-scale power system failures, the reset efficiency of the fuse has significant advantages.

Description

Technical Field

[0001] The present invention relates to the technical field of power maintenance, and particularly to an intelligent fuse. Background Art

[0002] Drop fuses are generally installed on the branch lines of 10kV distribution lines, which can narrow the power outage range. Because they have an obvious disconnection point and possess the function of a disconnecting switch, a safe working environment is created.

[0003] Since drop fuses are usually installed at a relatively high position, when the fuse needs to be replaced, the staff must use an insulating rod to remove the fuse tube at a high place. After replacing the internal fuse, it is reinstalled on the insulating support. However, after a large-scale power failure, there are often a large number of fuse tubes that need to be replaced in the distribution system. If replaced one by one in the conventional way, not only is the operation difficult, but also the work efficiency is low.

[0004] Chinese Patent with application number CN202111319043.2 discloses a drop fuse, which includes an insulating support, a fuse tube, a reel and a fuse. A support arm is fixedly arranged at the bottom of the insulating support, and a clamping part is fixedly arranged at the top of the insulating support. The fuse tube includes a tube body, a static contact and a moving contact. The static contact and the moving contact are relatively arranged at both ends of the tube body. The static contact is fixedly connected to one end of the tube body, and the static contact is hinged to the support arm. The moving contact is movably provided with an elastic clamping part, and an elastic contraction part is fixedly arranged between the elastic clamping part and the fuse tube. The reel is movably arranged on the side wall of the tube body, and a first through hole is arranged through the side wall of the tube body. The moving contact is provided with a second through hole. One end of the fuse is wound on the reel of the reel, and the other end passes through the two through holes and abuts against the elastic clamping part. The elastic clamping part is detachably connected to the fuse. The support arm, the static contact, the fuse, the elastic clamping part and the clamping part are electrically conductive. This fuse stores the fuse through a reel. When the fuse melts, the operator needs to remove the fuse tube, then pull out a part of the fuse in the reel, and fix the fuse on the elastic clamping part, saving the step of replacing the fuse again. However, this method still requires removing the fuse tube, and the improvement of the overall efficiency is not high in a large-scale power system failure.

[0005] The Chinese patent with the application number CN202111319037.7 discloses a drop - out fuse, which includes an insulating support, a fuse tube, a locking member and a fuse wire. The upper and lower ends of the insulating support are respectively provided with a clamping portion and an arm; the fuse tube includes a tube body, a static contact and a moving contact. The static contact is hinged to the arm, and a fixing column is movably arranged on the moving contact. A clamping groove is formed on the side wall of the fixing column. An elastic contraction portion is fixedly arranged between the fixing column and the tube body. The fixing column has a working position where it is clamped with the clamping portion and a non - working position where it is separated from the clamping portion. The elastic contraction portion always has a tendency to drive the fixing column to rotate towards the non - working position; the locking member can lock the fixing column in the working position; equally - spaced first pull rings are fixedly arranged on the fuse wire. A reel is arranged outside the tube body. One end of the fuse wire is wound around the reel shaft of the reel, and the other end passes through the tube body, the moving contact and the clamping groove in sequence. The first pull ring at the outermost end of the fuse wire abuts against the fixing column. Through the above structure, effects such as high fuse wire replacement efficiency and low operation difficulty are achieved. The ultimate effect of this fuse is that it is not necessary to remove the fuse tube body, and only the fuse wire in the reel needs to be re - connected. However, the connection process of the fuse wire still needs to be carried out manually. Since the fuse itself is at a relatively high position, it is difficult for the staff to directly perform more delicate operations on the fuse wire remotely on the ground through an insulating rod.

[0006] Therefore, it is necessary to invent an intelligent fuse to solve the above problems. Summary of the Invention

[0007] In view of the above problems, the present invention provides an intelligent fuse, which has the advantages of high wire replacement efficiency and strong universality.

[0008] The present invention includes an insulating support and a fuse tube. A connecting arm is fixedly connected to the bottom of the insulating support. A static contact matching the connecting arm is arranged at the bottom of the fuse tube. An elastic arm is fixedly connected to the top of the insulating seat. The present invention further includes:

[0009] A fusing member, which is located inside the fuse tube and can perform a fusing action. A conductive member penetrating into the interior of the fuse tube is fixedly connected to the static contact, and the conductive member is in contact with the fusing member;

[0010] A winding component, including a reel located on one side of the fuse tube. A reel shaft is coaxially arranged inside the reel;

[0011] A wire feeding component, including a wire feeding block that moves up and down inside the fuse tube. The wire feeding block has a first sliding state and a second sliding state. In the first sliding state, the wire feeding block drives the fusing member to move upward. In the second sliding state, the wire feeding block resets to the initial position. An actuating mechanism is arranged at the bottom of the fuse tube to drive the wire feeding block into the first sliding state. A reset mechanism is arranged on the wire feeding component to make the wire feeding block enter the second sliding state;

[0012] The clamping component includes a clamping contact head fixedly connected to an elastic arm. A connecting groove is formed in the clamping contact head. Clamping blocks are respectively slidably connected to both sides of the connecting groove. Both the clamping contact head and the clamping blocks are electrically conductive. When the top of the fuse tube approaches the clamping contact head to form a limit, the two clamping blocks approach each other.

[0013] Preferably, the fusing element includes a fuse wire. One end of the fuse wire is wound around a reel, and the other end is clamped to a wire feeding block. The fuse wire includes multiple sections of fusing parts and conductive parts arranged alternately. The melting point of the fusing part is lower than that of the conductive part, and the melting points of the respective fusing parts change in a stepped manner, with the melting point of the fusing part closer to the reel side being the highest.

[0014] Preferably, an annular cavity is formed in the wire feeding block. A clamping plate is slidably connected in the annular cavity. The clamping plate is connected to the annular cavity through a spring. A connecting rod is eccentrically arranged on the wire feeding block. The connecting rod is of a hollow structure. The reset mechanism is located at the top of the connecting rod. A branch pipe located in the annular cavity is arranged on the connecting rod. A positioning cylinder is provided on the clamping plate and is in sealed sliding connection with the branch pipe. The bottom of the connecting rod is in sealed sliding connection with a fixed rod. The fixed rod is a tubular structure with openings at both ends. An elastic reset member is arranged between the fixed rod and the wire feeding block.

[0015] Preferably, the actuating mechanism includes an annular cylinder coaxially fixed to the bottom of the fuse tube. A partition is coaxially fixed in the annular cylinder. The partition divides the annular cylinder into an inner cavity and an outer cavity. The inner cavity and the outer cavity communicate with each other. The fixed rod is fixedly connected to the top of the annular cylinder and communicates with the inner cavity. A piston member that slides up and down is arranged in the outer cavity. The bottom of the annular cylinder is fixedly connected with an L-shaped pipe. The piston member is in sealed sliding connection with the L-shaped pipe. The end of the L-shaped pipe far from the annular cylinder is in sealed sliding connection with a ball head rod;

[0016] An installation part is arranged on the connecting arm. The installation part includes an installation plate. An activity groove is formed in the installation plate. A connecting plate is fixedly connected to one side of the installation plate. An activity channel is formed between the connecting plate and the installation plate. The ball head part of the ball head rod is located in the activity channel;

[0017] An air hole communicating with the outer cavity is formed at the top of the annular cylinder. The bottom of the annular cylinder is fixedly connected with an air inlet pipe. A conical flow channel is arranged in the air inlet pipe. A sealing ball that moves up and down is arranged in the conical flow channel.

[0018] Preferably, the reset mechanism includes a sealing plug located at the top of the connecting rod. The sealing plug is in sealed sliding connection with the connecting rod. Below the sealing plug, a connecting cylinder is fixedly connected through a plurality of connecting columns. An air outlet channel is formed between the sealing plug and the connecting cylinder. A plurality of circumferentially distributed L-shaped flow channels are formed at the top of the connecting rod. A push rod is coaxially fixed inside the fixed rod, and a retaining ring is coaxially fixed at the top inner wall of the melting tube.

[0019] A limiting groove is formed inside the connecting rod, and a limiting ring is coaxially fixed at the bottom of the connecting cylinder.

[0020] Preferably, the clamping component further includes a moving rod slidably connected to the clamping contact head. One end of the clamping block away from the connecting groove is arranged as an arc surface and is provided with a clamping groove. Two symmetrically distributed connecting strips are fixedly connected to the moving rod. A sliding rod is fixed at one end of the connecting strip away from the moving rod. A clamping block matching the clamping groove is fixedly connected to the top of the sliding rod.

[0021] Preferably, two symmetrically distributed sliding cavities are formed inside the clamping contact head. A sliding rod is coaxially slidable inside the sliding cavity. One end of the sliding rod passing through the sliding cavity is fixedly connected to the top of the clamping block. The other end of the sliding rod is coaxially fixed with a positioning plate. Limiting cavities are respectively formed at the tops of the two sliding cavities. A limiting plate is slidably connected in the limiting cavity through a spring. A plurality of equidistantly distributed one-way limiting teeth are fixedly connected to the bottom of the limiting plate. The distance between each one-way limiting tooth matches the thickness of the positioning plate.

[0022] One end of the two limiting plates passing through the limiting cavity is fixedly connected to the same connecting ring.

[0023] Preferably, the fusing element includes a variable diameter component and a metal wire. The variable diameter component includes a housing coaxially fixed below the wire feeding block. A rotating cylinder is coaxially rotatable inside the housing. A positioning rod is fixedly connected inside the melting tube. A spiral track is formed on the positioning rod. A connecting wheel matching the threaded track is arranged on the positioning rod. The connecting wheel and the rotating cylinder are connected through a synchronous belt transmission structure. An installation block is fixedly connected to the outer wall of the housing. The installation block is rotationally connected to the connecting wheel.

[0024] A plurality of circumferentially distributed arc-shaped blocks are fixedly connected to the inner wall of the rotating cylinder. An arc-shaped groove is formed in the arc-shaped block. The cross-section of the arc-shaped groove is a spherical structure. A plurality of roller units matching the arc-shaped blocks are arranged inside the rotating cylinder. The roller unit includes a connecting frame and a roller. One side of the connecting frame is fixedly connected with a connecting piece matching the arc-shaped groove. Sliding grooves matching the rollers are respectively formed on the upper and lower sides of the housing.

[0025] Preferably, a plurality of circumferentially distributed pressing strips are arranged on the outer wall of the roller.

[0026] Preferably, the roller includes an upper rotating rod in the upper half and a lower rotating rod in the lower half, and threaded strips are mirror - arranged on the outer walls of the upper rotating rod and the lower rotating rod respectively.

[0027] The technical solution provided by the present invention has the following beneficial effects compared with the prior art:

[0028] 1. Through the settings of the wire feeding component, the actuating mechanism, the clamping component and the reset mechanism, etc., when the staff performs wire replacement and reset operations on the high - altitude drop - type fuse on the ground, they only need to push the connecting ring upward through the insulating rod to make the residual fuse of the fuse break off, and then push the fuse tube to reset again. During the reset process of the fuse tube, the new fuse will be re - connected to the clamping component. The whole process does not require the staff to perform cumbersome operations on the fuse tube and the fuse, greatly improving the efficiency of fuse wire replacement and reset, especially for large - scale power system failures, and there is a significant advantage in the reset efficiency of the fuse.

[0029] 2. Through the settings of the housing, the rotating cylinder, the positioning rod and the rolling unit, etc., after installing the conventional metal wire in the fuse tube, the diameter - changing component can extrude and change the diameter of the metal wire, making the resistance of the diameter - changing section increase significantly, so as to realize the control of the fuse position of the metal wire and improve the universality of the fuse.

[0030] 3. Through the settings of the upper rotating rod, the lower rotating rod and the spiral strip, etc., while the metal wire is subjected to a lateral extrusion force, it will also be subjected to upward and downward pulling forces, causing the metal wire to undergo tensile deformation, further improving the diameter - changing effect of the metal wire and also avoiding the problem of elastic reset of the metal wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a three - dimensional schematic diagram of the present invention.

[0032] Figure 2 is a side view in the plane of the present invention.

[0033] Figure 3 is a cross - sectional view in the plane of the present invention.

[0034] Figure 4 is a partial cross - sectional view of the clamping contact head and the connecting piece in the present invention.

[0035] Figure 5 is a three - dimensional cross - sectional view of the wire feeding component in the present invention.

[0036] Figure 6 is a three - dimensional cross - sectional view of the actuating mechanism in the present invention.

[0037] Figure 7 is a schematic diagram of the cooperation of the air inlet pipe and the sealing ball in the present invention.

[0038] Figure 8 is the present invention Figure 5Schematic enlarged view of the structure at B in [the figure].

[0039] Figure 9 is the present invention Figure 3 Schematic enlarged view of the structure at A in [the figure].

[0040] Figure 10 is a three-dimensional semi-sectional view of the card contact head of the present invention from another angle.

[0041] Figure 11 is a plane cross-sectional view of Embodiment 2 of the present invention.

[0042] Figure 12 is a three-dimensional cross-sectional view of the variable diameter component of the present invention.

[0043] Figure 13 is a schematic diagram of the cooperation between the housing and the connecting member of the present invention.

[0044] Figure 14 is a three-dimensional schematic diagram of the arc-shaped block and the arc-shaped groove of the present invention.

[0045] Figure 15 is a three-dimensional schematic diagram of the upper rotating rod and the lower rotating rod in Embodiment 3 of the present invention.

[0046] Figure 16 is a three-dimensional schematic diagram of the connecting member of the present invention.

[0047] Description of the reference numerals in the schematic diagram:

[0048] 1. Insulating support; 2. Fuse tube; 3. Connecting arm; 4. Static contact; 5. Elastic arm; 6. Fuse element; 7. Conductive member; 8. Reel; 9. Wire feeding block; 10. Card contact head; 11. Connecting groove; 12. Clamping block; 13. Fusing part; 14. Conductive part; 15. Annular cavity; 16. Clamping plate; 17. Connecting rod; 18. Branch pipe; 19. Positioning cylinder; 20. Fixed rod; 21. Elastic reset member; 22. Annular cylinder; 23. Partition; 24. Inner cavity; 25. Outer cavity; 26. Piston member; 27. L-shaped pipe; 28. Ball head rod; 29. Mounting plate; 30. Activity groove; 31. Connecting plate; 32. Activity channel; 33. Intake pipe; 34. Sealing ball; 35. Sealing plug; 36. Connecting cylinder; 37. Air outlet channel; 38. L-shaped flow channel; 39. Thrust rod; 40. Retaining ring; 41. Moving rod; 42. Card slot; 43. Connecting strip; 44. Sliding rod; 45. Sliding cavity; 46. Slide bar; 47. Positioning plate; 48. Limiting cavity; 49. Limiting plate; 50. One-way limiting teeth; 51. Connecting ring; 52. Variable diameter component; 53. Metal wire; 54. Housing; 55. Rotating cylinder; 56. Positioning rod; 57. Connecting wheel; 58. Mounting block; 59. Arc-shaped block; 60. Arc-shaped groove; 61. Connecting frame; 62. Roller; 63. Connecting member; 64. Upper rotating rod; 65. Lower rotating rod; 66. Threaded strip. Detailed implementation manners

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0050] Embodiment 1

[0051] In the use of a drop-out fuse, when replacing the fuse wire, the staff needs to use an insulating rod to remove the fuse tube 2 at a high place. After replacing the internal fuse wire, it is reinstalled on the insulating support 1. There are also some drop-out fuses that adopt the method of winding the fuse wire. When the fuse wire melts, the fuse tube 2 is removed, and the fuse wire is directly pulled and fixed again, or the fuse tube 2 is not removed, and only an insulating rod is used to operate the fuse wire below. However, the above two methods still have corresponding problems: First, although the steps of replacing the fuse wire again are saved, the fuse tube 2 still needs to be removed, so in large-scale power system failures, the overall efficiency improvement is not high; Second, since the fuse itself is at a relatively high position, it is difficult for the staff to directly perform relatively delicate operations on the fuse wire remotely on the ground through the insulating rod. To solve the above problems, an intelligent fuse is proposed in this embodiment.

[0052] As shown by Figures 1 to 3 It includes an insulating support 1 and a fuse tube 2. A connecting arm 3 is fixedly connected to the bottom of the insulating support 1. A static contact 4 matching the connecting arm 3 is arranged at the bottom of the fuse tube 2. An elastic arm 5 is fixedly connected to the top of the insulating seat. It also includes a fusing element 6, a winding assembly, a wire feeding assembly, and a clamping assembly. The fusing element 6 is located in the fuse tube 2 and can perform a fusing action. A conductive member 7 penetrating into the interior of the fuse tube 2 is fixedly connected to the static contact 4. The conductive member 7 is in contact with the fusing element 6. In this embodiment, the fusing element 6 includes a fuse wire, and the fuse wire includes a plurality of staggered fusing parts 13 and conductive parts 14. The melting point of the fusing part 13 is lower than that of the conductive part 14, and the melting point of the fusing part 13 changes in a stepped manner.

[0053] Refer to Figure 2 and Figure 3 As shown, the winding assembly includes a reel 8 on one side of the fuse tube 2. A spool is coaxially arranged in the reel 8. One end of the fuse wire is wound around the spool. The melting point of the fusing part 13 near the spool is the highest. A torsion spring is arranged between the spool and the reel 8 so that the fuse wire is subjected to a certain pre-tightening force on the spool.

[0054] Refer to Figure 3As shown in the figure, the wire feeding assembly includes a wire feeding block 9 that moves up and down within a melting tube 2. One end of the fuse wire away from the reel is clamped to the wire feeding block 9. The wire feeding block 9 has a first sliding state and a second sliding state. In the first sliding state, the wire feeding block 9 drives the fuse wire to move upward, and the fuse wire in the reel 8 pays out. In the second sliding state, the wire feeding block 9 resets to its initial position.

[0055] An actuator is provided at the bottom of the melting tube 2 to drive the wire feeding block 9 into the first sliding state. A reset mechanism is provided on the wire feeding assembly to enable the wire feeding block 9 to enter the second sliding state.

[0056] Reference Figure 3 And Figure 4 As shown in the figure, the clamping assembly includes a clamping contact head 10 fixedly connected to an elastic arm 5. A connection groove 11 is formed on the clamping contact head 10. Two clamping blocks 12 are respectively slidably connected to both sides of the connection groove 11. When the top of the melting tube 2 approaches the clamping contact head 10 to form a limit, the two clamping blocks 12 approach each other and fix the fuse wire. A plurality of ridges or bumps are fixed on the contact surfaces of the two clamping blocks 12 and the fuse wire to strengthen the fixing of the clamping blocks 12 to the fuse wire.

[0057] Reference Figure 5 As shown in the figure, to further supplement the wire feeding assembly, an annular cavity 15 is formed in the wire feeding block 9. A clamping plate 16 is slidably connected to the annular cavity 15. The clamping plate 16 is connected to the annular cavity 15 by a spring. The clamping force of the clamping plate 16 on the fuse wire is less than the clamping force of the two clamping blocks 12 on the fuse wire. The fuse wire is coaxial with the wire feeding block 9 and its end passes through the annular cavity 15. At this time, the clamping plate 16 fixes the fuse wire under the action of the spring. A plurality of clamping blocks are provided on the contact surface between the clamping plate 16 and the fuse wire to strengthen the fixing of the fuse wire. An eccentric connecting rod 17 is provided on the wire feeding block 9. The connecting rod 17 is of a hollow structure. The reset mechanism is located at the top of the connecting rod 17. A branch pipe 18 located within the annular cavity 15 is provided on the connecting rod 17. A positioning cylinder 19 that is hermetically slidably connected to the branch pipe 18 is provided on the clamping plate 16. When gas enters the interior of the connecting rod 17, the positioning cylinder 19 slides on the branch pipe 18 to further strengthen the fixing of the clamping plate 16 to the fuse wire. The bottom of the connecting rod 17 is hermetically slidably connected to a fixing rod 20. The fixing rod 20 is a tubular structure with openings at both ends. An elastic reset member 21 is provided between the fixing rod 20 and the wire feeding block 9. The elastic reset member 21 is a spring.

[0058] Reference Figure 6As shown in the figure, the actuator includes an annular cylinder 22 coaxially fixed to the bottom of the fuse tube 2. A partition 23 is coaxially fixed inside the annular cylinder 22. The partition 23 divides the annular cylinder 22 into an inner cavity 24 and an outer cavity 25. The inner cavity 24 and the outer cavity 25 communicate with each other. The fixed rod 20 is fixedly connected to the top of the annular cylinder 22 and communicates with the inner cavity 24. A piston member 26 that slides up and down is arranged in the outer cavity 25. The piston member 26 includes a piston ring that slides in the outer cavity 25. A piston rod is fixedly connected below the piston ring. One end of the piston rod away from the piston ring is fixedly connected to a piston plate. The bottom of the annular cylinder 22 is fixedly connected to an L-shaped pipe 27. The piston plate slides in the L-shaped pipe 27 in a sealed manner. One end of the L-shaped pipe 27 away from the annular cylinder 22 is slidably connected to a ball head rod 28 in a sealed manner.

[0059] Reference Figure 3 and Figure 9 As shown in the figure, an installation part is arranged on the connecting arm 3. The installation part includes an installation plate 29. An activity groove 30 is opened on the installation plate 29. A connecting plate 31 is fixedly connected to one side of the installation plate 29. An activity channel 32 is formed between the connecting plate 31 and the installation plate 29. The ball head part of the ball head rod 28 is located in the activity channel 32.

[0060] Reference Figure 7 As shown in the figure, considering that when the fuse melts, the fuse tube 2 will tilt. At this time, the piston member 26 moves upward in the outer cavity 25. In order to ensure the normal movement of the piston member 26, air holes communicating with the outer cavity 25 are opened at the top of the annular cylinder 22. An air inlet pipe 33 is fixedly connected to the bottom of the annular cylinder 22. A conical flow channel is arranged in the air inlet pipe 33. A sealing ball 34 that moves up and down is arranged in the conical flow channel. When the piston member 26 moves upward in the outer cavity 25, the sealing ball 34 will move upward under the drive of pressure. At this time, external gas will enter the annular cylinder 22.

[0061] Reference Figure 8 As shown in the figure, the reset mechanism includes a sealing plug 35 located at the top of the connecting rod 17. The sealing plug 35 is slidably connected to the connecting rod 17 in a sealed manner. A connecting cylinder 36 is fixedly connected below the sealing plug 35 through a plurality of connecting columns. An air outlet channel 37 is formed between the sealing plug 35 and the connecting cylinder 36. A plurality of L-shaped flow channels 38 that are circumferentially distributed are opened at the top of the connecting rod 17. A top rod 39 is coaxially fixed inside the fixed rod 20. A retaining ring 40 is coaxially fixed to the top of the inner wall of the fuse tube 2. When the actuator drives the wire feeding block 9 and the fuse to move upward to the maximum extent, after the sealing plug 35 is blocked by the retaining ring 40, it slides downward until the air outlet channel 37 matches the L-shaped flow channel 38. The connecting rod 17 changes from a sealed state to a deflated state. At this time, the connecting rod 17 enters the second sliding state under the action of the elastic reset member 21 and the self-weight of the wire feeding block 9. Finally, the wire feeding block 9 resets to the initial position.

[0062] To prevent excessive movement of the sealing plug 35, a limiting groove is provided in the connecting rod 17, and a limiting ring is coaxially fixed at the bottom of the connecting cylinder 36. When the connecting cylinder 36 slides on the top of the connecting rod 17, the limiting groove can limit the moving distance of the connecting cylinder 36 and prevent the sealing plug 35 from moving excessively.

[0063] Reference Figure 4 and Figure 10 As shown, to further supplement the structure of the clamping component, the clamping component further includes a moving rod 41 slidably connected to the clamping contact head 10. One end of the clamping block 12 away from the connecting groove 11 is provided with an arc surface and a clamping groove 42 is provided. The cross-section of the clamping groove 42 is a T-shaped, spherical or regular polygon structure. Two symmetrically distributed connecting bars 43 are fixedly connected to the moving rod 41. One end of the connecting bar 43 away from the moving rod 41 is fixed with a sliding rod 44. A clamping block matching the clamping groove 42 is fixedly connected to the top of the sliding rod 44. When the top of the fuse tube 2 is limited by the clamping contact head 10, the moving rod 41 moves upward after being squeezed by the fuse tube 2, and the two sliding rods 44 move upward accordingly and make the two clamping blocks 12 approach each other.

[0064] Reference Figure 10 As shown, two symmetrically distributed sliding cavities 45 are provided in the clamping contact head 10. A sliding rod 46 is coaxially slidable in the sliding cavity 45. One end of the sliding rod 46 passing through the sliding cavity 45 is fixedly connected to the top of the clamping block 12. The other end of the sliding rod 46 is coaxially fixed with a positioning plate 47. Limiting cavities 48 are respectively provided at the tops of the two sliding cavities 45. A limiting plate 49 is slidably connected in the limiting cavity 48 through a spring. A plurality of equidistantly distributed one-way limiting teeth 50 are fixedly connected to the bottom of the limiting plate 49. The spacing of each one-way limiting tooth 50 matches the thickness of the positioning plate 47.

[0065] One end of the two limiting plates 49 passing through the limiting cavity 48 is fixedly connected to the same connecting ring 51.

[0066] In use, the fuse tube 2 is installed on the connecting arm 3 through an insulating rod. During installation, the ball head part of the ball head rod 28 is located in the movable channel 32, and then the fuse tube 2 is pushed to move towards the side of the elastic arm 5. During the movement, the ball head rod 28 displaces in the L-shaped tube 27, and the piston part 26 compresses downward to make the gas in the inner cavity 24 enter the fixed rod 20 and the connecting rod 17. The connecting rod 17 drives the wire feeding block 9 and the fuse wire to move upward. When the top of the fuse tube 2 generates a limit with the contact head 10, the moving rod 41 is extruded by the fuse tube 2 and moves upward. At this time, the two clamping blocks 12 approach each other under the push of the sliding rod 44 and fix the fuse wire. The one-way limiting teeth 50 on the limiting plate 49 limit the positioning plate 47, thereby completing the fixation of the fuse wire. At the same time, when the wire feeding block 9 and the fuse wire move upward to the highest position, the sealing plug 35 slides downward after being blocked by the retaining ring 40. When the air outlet channel 37 communicates with the L-shaped flow channel 38, the connecting rod 17 changes from a sealed state to a deflated state. At this time, the connecting rod 17 enters the second sliding state under the action of the elastic resetting member 21 and the self-weight of the wire feeding block 9, and finally the wire feeding block 9 returns to the initial position. Finally, when the fuse wire is melted and broken, the fuse tube 2 is separated from the elastic arm 5 and the contact head 10 and tilts to one side. The operator only needs to push the connecting ring 51 upward through the insulating rod, the positioning plate 47 will be released from the limit, the two clamping blocks 12 will move away under the action of the spring, and the residual fuse wire after melting will fall off by itself. Then, the operator can use the insulating rod to push the fuse tube 2 to reset again.

[0067] Through the settings of the wire feeding assembly, the actuating mechanism, the clamping assembly, the reset mechanism, etc., when the staff performs wire replacement and reset operations on the high-mounted drop-out fuse on the ground, the operator only needs to push the connecting ring 51 upward through the insulating rod to make the residual fuse wire after melting fall off, and then push the fuse tube 2 to reset again. During the reset process of the fuse tube 2, the new fuse wire will be reconnected to the clamping assembly. The whole process does not require the staff to perform cumbersome operations on the fuse tube 2 and the fuse wire, which greatly improves the efficiency of fuse wire replacement and reset, especially for large-scale power system failures, and has significant advantages in the reset efficiency of the fuse.

[0068] Embodiment 2

[0069] Since the above embodiment uses a specially treated fuse wire, the melting position of the fuse wire can be controlled according to the change of the melting point, so that most of the existing fuse wires on the market do not meet the use conditions of the fuse, which to a certain extent limits the universality of the fuse. In view of the above problems, further improvements are made on the basis of the above embodiment.

[0070] Reference Figure 11 and Figure 12As shown, the fuse element 6 includes a diameter-changing component 52 and a metal wire 53. The metal wire 53 is a common fuse wire on the existing market. The diameter-changing component 52 includes a housing 54 coaxially fixed below the wire-feeding block 9. A rotating cylinder 55 rotates coaxially inside the housing 54. A positioning rod 56 is fixedly connected inside the fuse tube 2. A spiral track is provided on the positioning rod 56. A connecting wheel 57 matching the threaded track is arranged on the positioning rod 56. The connecting wheel 57 is connected to the rotating cylinder 55 through a synchronous belt transmission structure. An installation block 58 is fixedly connected to the outer wall of the housing 54. The installation block 58 is rotatably connected to the connecting wheel 57.

[0071] Reference Figure 13 、 Figure 14 and Figure 16 As shown, a plurality of arc-shaped blocks 59 evenly distributed in a circumferential direction are fixedly connected to the inner wall of the rotating cylinder 55. An arc-shaped groove 60 is provided on the arc-shaped block 59. The cross-section of the arc-shaped groove 60 is a spherical structure. A plurality of roller units matching the arc-shaped blocks 59 are arranged inside the rotating cylinder 55. The roller unit includes a connecting frame 61 and a roller 62. Connecting shafts are coaxially fixed to the upper and lower ends of the roller 62 respectively. The connecting shafts are rotatably connected to the connecting frame 61. A connecting piece 63 matching the arc-shaped groove 60 is fixedly connected to one side of the connecting frame 61. Chute grooves matching the connecting shafts are respectively provided on the upper and lower sides of the housing 54.

[0072] In order to strengthen the extrusion force of the roller 62 on the metal wire 53 and improve the diameter-changing effect of the metal wire 53, a plurality of pressure strips evenly distributed in a circumferential direction are arranged on the outer wall of the roller 62.

[0073] During use, when the wire-feeding block 9 drives the housing 54 to move upward, the connecting wheel 57 moves and rotates on the positioning rod 56. The rotating cylinder 55 rotates inside the housing 54. At this time, the relative positions of the arc-shaped block 59 and the connecting frame 61 change. The connecting frame 61 drives the roller 62 to approach the metal wire 53 and generates a relatively large pressing force on the metal wire 53. As the rotating cylinder 55 rotates, the roller 62 continuously extrudes the metal wire 53. Finally, the diameter of the metal wire 53 is reduced. The resistance of this section with a smaller diameter is higher, so it is more likely to melt.

[0074] Through the settings of the housing 54, the rotating cylinder 55, the positioning rod 56, the roller unit, etc., after the conventional metal wire 53 is installed in the fuse tube 2, the diameter-changing component 52 can extrude and change the diameter of the metal wire 53, making the resistance of the diameter-changing section increase significantly, so as to realize the control of the melting position of the metal wire 53 and improve the universality of the fuse.

[0075] Embodiment III

[0076] In order to further strengthen the diameter-changing effect of the metal wire 53 and prevent the problem of elastic reset of the metal wire 53 after extrusion.

[0077] Reference Figure 15 andFigure 16 As shown, the roller 62 includes an upper rotating rod 64 in the upper half and a lower rotating rod 65 in the lower half. Threaded strips 66 are respectively arranged in a mirror image on the outer walls of the upper rotating rod 64 and the lower rotating rod 65.

[0078] In use, when the roller 62 squeezes the wire 53 while rotating, during the rotation of the roller 62, the threaded strips 66 arranged on the upper rotating rod 64 and the lower rotating rod 65 respectively generate upward and downward pulling forces on the wire 53. At this time, the middle part of the variable diameter section undergoes tensile deformation, thereby forming the fuse position with the smallest diameter.

[0079] Through the settings of the upper rotating rod 64, the lower rotating rod 65 and the spiral strip, etc., while the wire 53 is subjected to a lateral extrusion force, it will also be subjected to upward and downward pulling forces to cause the wire 53 to undergo tensile deformation, further improving the variable diameter effect of the wire 53 and also avoiding the problem of elastic reset of the wire 53.

[0080] The above embodiments are only the preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention fall within the scope of protection required by the present invention.

Claims

1. An intelligent fuse, comprising an insulating support (1) and a fuse tube (2). A connecting arm (3) is fixedly connected to the bottom of the insulating support (1). A static contact (4) matching the connecting arm (3) is arranged at the bottom of the fuse tube (2). An elastic arm (5) is fixedly connected to the top of the insulating support (1), characterized in that, Further comprising: A fusing element (6), which is located inside the fuse tube (2) and can perform a fusing action. A conductive member (7) penetrating into the interior of the fuse tube (2) is fixedly connected to the static contact (4), and the conductive member (7) contacts the fusing element (6); A winding assembly, including a reel (8) located on one side of the fuse tube (2), and a spool is coaxially arranged inside the reel (8); A wire feeding assembly, including a wire feeding block (9) that moves up and down inside the fuse tube (2). The wire feeding block (9) has a first sliding state and a second sliding state. In the first sliding state, the wire feeding block (9) drives the fusing element (6) to move upward. In the second sliding state, the wire feeding block (9) resets to the initial position. An actuating mechanism is provided at the bottom of the fuse tube (2) to drive the wire feeding block (9) into the first sliding state, and a reset mechanism is provided on the wire feeding assembly to enable the wire feeding block (9) to enter the second sliding state; A clamping assembly, including a clamping contact head (10) fixedly connected to the elastic arm (5). A connecting groove (11) is formed in the clamping contact head (10), and clamping blocks (12) are respectively slidably connected to both sides of the connecting groove (11). The clamping contact head (10) and the clamping blocks (12) are both electrically conductive. When the top of the fuse tube (2) approaches the clamping contact head (10) to form a limit, the two clamping blocks (12) approach each other; Two symmetrically distributed sliding cavities (45) are formed in the clamping contact head (10). Limiting cavities (48) are respectively formed at the tops of the two sliding cavities (45). A limiting plate (49) is slidably connected to the limiting cavity (48) through a spring. One ends of the two limiting plates (49) penetrating through the limiting cavity (48) are fixedly connected to the same connecting ring (51).

2. The intelligent fuse according to claim 1, wherein: The fusing element (6) includes a fuse wire. One end of the fuse wire is wound around the spool, and the other end is clamped to the wire feeding block (9). The fuse wire includes multiple staggered fusing portions (13) and conductive portions (14). The melting point of the fusing portion (13) is lower than that of the conductive portion (14), and the melting points of the respective fusing portions (13) change in a stepped manner, with the melting point of the fusing portion (13) closer to the spool side being the highest.

3. The intelligent fuse according to claim 1, wherein: An annular cavity (15) is formed in the wire feeding block (9). A clamping plate (16) is slidably connected to the annular cavity (15). The clamping plate (16) is connected to the annular cavity (15) through a spring. A connecting rod (17) is eccentrically arranged on the wire feeding block (9). The connecting rod (17) is of a hollow structure. The reset mechanism is located at the top of the connecting rod (17). A branch pipe (18) located inside the annular cavity (15) is provided on the connecting rod (17). A positioning cylinder (19) that is hermetically and slidably connected to the branch pipe (18) is provided on the clamping plate (16). The bottom of the connecting rod (17) is hermetically and slidably connected to a fixed rod (20). The fixed rod (20) is a tubular structure with both ends open. An elastic reset member (21) is provided between the fixed rod (20) and the wire feeding block (9).

4. The intelligent fuse according to claim 3, characterized in that: The actuator includes an annular cylinder (22) coaxially fixed to the bottom of the fuse tube (2). A partition (23) is coaxially fixed inside the annular cylinder (22). The partition (23) divides the annular cylinder (22) into an inner cavity (24) and an outer cavity (25). The inner cavity (24) and the outer cavity (25) communicate with each other. The fixed rod (20) is fixedly connected to the top of the annular cylinder (22) and communicates with the inner cavity (24). A piston member (26) that slides up and down is arranged in the outer cavity (25). The bottom of the annular cylinder (22) is fixedly connected to an L-shaped pipe (27). The piston member (26) is in sealed sliding connection with the L-shaped pipe (27). A ball head rod (28) is in sealed sliding connection with one end of the L-shaped pipe (27) away from the annular cylinder (22). An installation part is arranged on the connecting arm (3). The installation part includes an installation plate (29). A moving slot (30) is formed in the installation plate (29). A connecting plate (31) is fixedly connected to one side of the installation plate (29). An activity channel (32) is formed between the connecting plate (31) and the installation plate (29). The ball head part of the ball head rod (28) is located in the activity channel (32). An air hole communicating with the outer cavity (25) is formed in the top of the annular cylinder (22). The bottom of the annular cylinder (22) is fixedly connected to an air inlet pipe (33). A conical flow channel is arranged in the air inlet pipe (33). A sealing ball (34) that moves up and down is arranged in the conical flow channel.

5. An intelligent fuse according to claim 4, characterized in that: The reset mechanism includes a sealing plug (35) located at the top of the connecting rod (17). The sealing plug (35) is in sealed sliding connection with the connecting rod (17). A connecting cylinder (36) is fixedly connected to the lower part of the sealing plug (35) through a plurality of connecting columns. An air outlet channel (37) is formed between the sealing plug (35) and the connecting cylinder (36). A plurality of L-shaped flow channels (38) evenly distributed in a circumferential direction are formed in the top of the connecting rod (17). A push rod (39) is coaxially fixed inside the fixed rod (20). A retaining ring (40) is coaxially fixed to the top inner wall of the fuse tube (2). A limiting slot is formed in the connecting rod (17). A limiting ring is coaxially fixed to the bottom of the connecting cylinder (36).

6. The intelligent fuse according to claim 5, characterized in that: The clamping component further includes a moving rod (41) slidably connected to the clamping contact head (10). One end of the clamping block (12) away from the connecting slot (11) is arranged as an arc surface and is provided with a clamping slot (42). Two symmetrically distributed connecting strips (43) are fixedly connected to the moving rod (41). A sliding rod (44) is fixed to the end of the connecting strip (43) away from the moving rod (41). A clamping block matched with the clamping slot (42) is fixedly connected to the top of the sliding rod (44).

7. An intelligent fuse according to claim 6, characterized in that: A slide bar (46) slides coaxially within the slide cavity (45). One end of the slide bar (46) that penetrates through the slide cavity (45) is fixedly connected to the top of the clamping block (12). The other end of the slide bar (46) is coaxially fixed with a positioning plate (47). A plurality of equally spaced one-way limiting teeth (50) are fixedly connected to the bottom of the limiting plate (49). The spacing of each one-way limiting tooth (50) matches the thickness of the positioning plate (47).

8. An intelligent fuse according to claim 7, characterized in that: The fusing element (6) includes a diameter-changing component (52) and a metal wire (53). The diameter-changing component (52) includes a housing (54) coaxially fixed below the wire-feeding block (9). A rotating cylinder (55) rotates coaxially within the housing (54). A positioning rod (56) is fixedly connected within the melting tube (2). A spiral track is provided on the positioning rod (56). A connecting wheel (57) that matches the threaded track is provided on the positioning rod (56). The connecting wheel (57) is connected to the rotating cylinder (55) through a synchronous belt drive structure. An installation block (58) is fixedly connected to the outer wall of the housing (54). The installation block (58) is rotatably connected to the connecting wheel (57). A plurality of circumferentially evenly distributed arc-shaped blocks (59) are fixedly connected to the inner wall of the rotating cylinder (55). An arc-shaped groove (60) is provided on the arc-shaped block (59). A plurality of rolling-roller units that match the arc-shaped blocks (59) are provided within the rotating cylinder (55). The rolling-roller unit includes a connecting frame (61) and a roller (62). A connecting member (63) that matches the arc-shaped groove (60) is fixedly connected to one side of the connecting frame (61). Slide grooves that match the rolling rollers are respectively provided on the upper and lower sides of the housing (54).

9. An intelligent fuse according to claim 8, characterized in that: A plurality of circumferentially evenly distributed pressing strips are provided on the outer wall of the roller (62).

10. An intelligent fuse according to claim 8, characterized in that: The roller (62) includes an upper rotating rod (64) in the upper half and a lower rotating rod (65) in the lower half. Threaded strips (66) are respectively arranged in a mirror image on the outer walls of the upper rotating rod (64) and the lower rotating rod (65).

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