Drop-out fuse in alpine region

Abstract

The invention discloses a drop-out fuse in an alpine region, and particularly relates to the technical field of power equipment, which comprises an insulator, a first support arm mounted at the top of the insulator, a second support arm mounted at the bottom of the insulator, hook grooves symmetrically formed in two sides of the second support arm, and a fuse tube limited on the hook grooves of the second support arm, two sides of the bottom of the fuse tube are provided with two rotating shafts. Under the cooperation of the limiting mechanism and the semi-ring piece, the two rotating shafts can be limited, continuous friction guiding is completed through the trigger piece and the multiple friction pieces, impact damage to the fuse tube is reduced, the fuse tube can swing towards the first supporting arm to complete locking action, and the safety of the fuse tube is improved. The fuse tube is arranged on the insulator, the problem of damage caused by repeated impact between the fuse tube and the insulator is avoided, and meanwhile, the auxiliary mechanism is added and can provide a certain twisting force for the rotating shaft, so that the fuse tube falls off more smoothly subsequently, and the problems of slow separation response and unsatisfactory separation effect are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of electric power equipment, in particular to a drop-out fuse for high-cold areas. Background Art

[0002] The drop-out fuse consists of an insulator, a fuse tube and a fuse. When a system fault occurs, the fault current causes the fuse to blow quickly. As the fuse blows, the fuse tube loses its tightening force and falls quickly under the action of its own gravity, disconnecting the circuit and cutting off the faulty section of the line or the faulty equipment.

[0003] A drop-out fuse disclosed in a patent application with reference publication number CN114038725B is provided with an insulator, a first arm, a second arm, a fuse tube and a plurality of fuses. When the circuit needs to be connected again, there is no need to remove the fuse tube from the power distribution system and then install the fuse. The dropped fuse tube is directly flipped upward until the card block of the next fuse abuts against the pressure block, thereby achieving the effect of quickly replacing the fuse and connecting the circuit.

[0004] The above-mentioned drop-out fuse can be well replaced with a plurality of fuses by the design of multiple fuses. However, the fuse tube and the support arm of such drop-out fuse are limited only by the hook groove provided on the support arm, and the dropped fuse tube cannot be stably guided and limited. Therefore, when the fuse tube falls freely, it is very easy to break away from the support arm and fall from a high altitude, which poses a great safety hazard. In addition, the fuse tube is disturbed by external environmental factors such as wind force, and will swing randomly on the support arm, which is very easy to cause impact damage to the insulator and circuit safety accidents. Moreover, this type of drop-out fuse does not provide assistance for the separation of the fuse tube and the insulator. Therefore, when the fuse is disconnected, there is a problem of slow response and unsatisfactory separation effect between the fuse tube and the insulator, which can easily interfere with the circuit operation and cannot quickly disconnect the circuit. Summary of the invention

[0005] The object of the present invention is to provide a drop-out fuse for use in high-cold areas to solve the above-mentioned technical problems.

[0006] To solve the above technical problems, the present invention is implemented through the following technical solutions.

[0007] The present invention is a drop-out type fuse for high-cold areas, comprising an insulator, a No. 1 support arm installed on the top of the insulator, a No. 2 support arm installed on the bottom of the insulator, hook grooves symmetrically opened on both sides of the No. 2 support arm, a fuse tube is restricted on the hook groove of the No. 2 support arm, two rotating shafts are installed on both sides of the bottom of the fuse tube, a limiting mechanism is added to one side of the No. 2 support arm, the limiting mechanism is used to complete the limiting action on the rotating shaft, and the limiting work of the fuse tube is completed by the limiting mechanism, a guiding locking mechanism is added to the limiting mechanism, the guiding locking mechanism is used to complete the guiding and locking action on the fuse tube, and an auxiliary mechanism is added to the No. 2 support arm, the auxiliary mechanism is used to complete the auxiliary disconnection of the fuse tube, and the auxiliary mechanism is linked with the guiding locking mechanism, and the guiding locking mechanism is reinforced and restricted by the auxiliary mechanism.

[0008] Furthermore, a semi-ring member is rotatably installed on one side of the No. 2 support arm through a pin shaft, and one of the rotating shafts is locked by cooperating between the semi-ring member and the hook groove, and a locking screw is threadedly inserted through one end of the semi-ring member, and a No. 1 positioning groove is opened on one side of the No. 2 support arm.

[0009] Furthermore, the limiting mechanism includes an annular member concentrically sleeved on the outside of one of the rotating shafts, a wedge block is installed on one side of the annular member, support ears are fixedly installed on the top and bottom of the annular member, and two guide rods are respectively installed on the top and top of one side of the second support arm, the two guide rods slide through the two support ears correspondingly, adjusting nuts are installed on the top of the two guide rods, and reset springs are sleeved on the outside of the two guide rods.

[0010] Furthermore, the guiding and locking mechanism comprises a plurality of friction parts which are arranged in a circular array on the inner wall of the annular part, each friction part is provided with a guiding inclined surface, and each friction part forms a limiting wall on the side away from the guiding inclined surface. A trigger part is detachably mounted on the rotating shaft, and the friction guiding and locking operations of the fuse tube are completed by the cooperation between the trigger part and the plurality of friction parts.

[0011] Furthermore, the trigger component includes a lifting frame, which is detachably fixed on a rotating shaft and has a gear ring fixedly sleeved on the rotating shaft. A sliding seat is slidably installed in the lifting frame, and a lifting arm is installed on the upper surface of the sliding seat. The lifting arm slides through the top of the lifting frame, a friction column is installed on the top of the lifting arm, and a push spring is installed between the bottom of the sliding seat and the lifting frame.

[0012] Furthermore, area No. 1 and area No. 2 are respectively recessed inwardly on both sides of the lifting arm, and a trigger plate No. 1 is slidably engaged in area No. 1, and a trigger plate No. 2 is slidably engaged in area No. 2, and four sliding rods are installed in a rectangular shape between the trigger plate No. 1 and the trigger plate No. 2, and the four sliding rods are correspondingly slid through the lifting arm arrangement, and the trigger plate No. 1 and the trigger plate No. 2 are respectively hidden in area No. 1 and area No. 2 under normal conditions, and deformation springs are correspondingly sleeved on the outside of the four sliding rods.

[0013] Furthermore, an adjustment seat is installed on one side of the slide seat, a positioning screw is passed through the adjustment seat through threaded engagement, and a No. 2 positioning groove is opened at the bottom of one side of the lifting frame.

[0014] Furthermore, the auxiliary mechanism includes a telescopic sleeve installed on one side of the second support arm, a sliding piece is slidably engaged in the telescopic sleeve, a push arm is detachably fixedly installed on one side of the sliding piece, a rack is installed on one side of the push arm, and the rack is meshed with the gear ring accordingly.

[0015] Furthermore, a pulling spring is installed in the telescopic sleeve. The pulling spring is detachably fixedly installed between the sliding piece and the end cover. The pushing arm is pulled to retract into the telescopic sleeve by the pulling spring.

[0016] Furthermore, an extension rod is detachably fixedly mounted on one side of the push arm, an assembly frame is mounted on one end of the extension rod, and a roller is rotatably mounted on one side of the assembly frame through a bracket.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention adds a limiting mechanism to the second support arm. Under the cooperation of the limiting mechanism and the semi-ring member, the two rotating shafts can be restricted, so that the fuse tube obtains a stable state, and the problem of falling off the insulator is avoided. At the same time, the overall installation and disassembly are convenient, which is conducive to subsequent maintenance; the present invention is provided with a guiding locking mechanism. After the fuse tube is separated from the insulator, the trigger member and the plurality of friction members complete continuous friction guidance, and the dynamic potential energy of the fuse tube can be absorbed step by step, reducing the impact damage of the fuse tube, and the guiding locking mechanism can swing the fuse tube toward the first support arm to complete the locking action, avoiding the problem of damage caused by repeated collisions between the fuse tube and the insulator, and improving the safety of the fuse tube after falling off; the present invention is provided with an auxiliary mechanism, and the auxiliary mechanism can provide a certain torsional force to the rotating shaft, so that the subsequent falling off of the fuse tube is smoother, and the problem of slow separation response and unsatisfactory separation effect is avoided. The auxiliary mechanism can complete the positioning of the guiding locking mechanism, and the displacement of the guiding locking mechanism during friction guidance is avoided, so that the operation of the fuse is safer and the occurrence of safety accidents is reduced. Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the overall front view of the present invention; Figure 2 It is a schematic diagram of the distribution of insulators and fuse tubes of the present invention; Figure 3 It is a schematic diagram of disconnection between the fuse tube and the insulator of the present invention; Figure 4 It is a schematic diagram of installing the fuse tube of the present invention on the second support arm; Figure 5 It is a schematic diagram of the installation of the limiting mechanism of the present invention on the second support arm; Figure 6 It is a schematic diagram of the restriction mechanism of the present invention; Figure 7 It is a schematic diagram of the distribution of the annular member and the rotating shaft of the present invention; Figure 8 It is a schematic diagram of the guide locking mechanism of the present invention; Fig. 9 A schematic diagram of a triggering member of the present invention; Fig.10 This is a schematic diagram of the distribution of the first trigger plate and the second trigger plate of the present invention; Fig.11 It is a schematic diagram of the auxiliary mechanism of the present invention; Fig.12 It is a schematic diagram of the distribution of the auxiliary mechanism and the guide locking mechanism of the present invention; Fig.13 It is a schematic diagram of the meshing of the rack and the gear ring of the present invention.

[0019] In the figure: 1, insulator; 2, No. 1 support arm; 3, No. 2 support arm; 4, hook groove; 5, fuse tube; 6, rotating shaft; 7, half ring; 8, locking screw; 9, No. 1 positioning groove; 10, ring; 11, wedge block; 12, support ear; 13, guide rod; 14, adjusting nut; 15, reset spring; 16, friction member; 17, guide slope; 18, limiting wall; 19, trigger member; 191, lifting frame; 192, gear ring; 193, slide seat; 194, lifting Lowering arm; 195, friction column; 196, push spring; 20, zone No. 1; 21, zone No. 2; 22, trigger plate No. 1; 23, slideway No. 1; 24, trigger plate No. 2; 25, slideway No. 2; 26, slide bar; 27, deformation spring; 28, adjustment seat; 29, positioning screw; 30, positioning groove No. 2; 31, telescopic sleeve; 32, slide; 33, push arm; 34, rack; 35, pull spring; 36, extension rod; 37, assembly frame; 38, roller. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0022] Embodiment 1: The present invention provides a technical solution: Figures 1 to 13 As shown, a drop-out fuse for high-cold areas includes an insulator 1, which specifically adopts one of a ceramic insulator 1 and a synthetic insulator 1, and a perforated sheet is installed on one side of the insulator 1, a No. 1 support arm 2 is installed on the top of the insulator 1, and a No. 2 support arm 3 is installed on the bottom of the insulator 1, and hook grooves 4 are symmetrically opened on both sides of the No. 2 support arm 3, and the top of the hook groove 4 is open, which is convenient for the installation and disassembly of the rotating shaft 6 on the fuse tube 5, and the fuse tube 5 is restricted on the hook groove 4 of the No. 2 support arm 3, and two rotating shafts 6 are installed on both sides of the bottom of the fuse tube 5, and the two rotating shafts 6 are correspondingly restricted in the two hook grooves 4, and a stopper for limiting the fuse tube 5 is provided on the No. 2 support arm 3, and the stopper is used to complete the restriction of the extreme falling position of the fuse tube 5, and the top of the fuse tube 5 is connected to the No. 1 support arm 2 of the insulator 1. Corresponding contacts, and a fuse is installed in the fuse tube 5, the fuse is correspondingly overlapped on the No. 1 branch arm 2, and a release is installed on the No. 1 branch arm 2, and the fuse is connected to the No. 1 branch arm 2 through the release. The overall operation process of the fuse is well known to technicians of this skill and will not be described in detail here. A limiting mechanism is added to one side of the No. 2 branch arm 3, and the limiting mechanism is used to complete the limiting action on the rotating shaft 6, and the limiting work of the fuse tube 5 is completed by the limiting mechanism. A guiding locking mechanism is added to the limiting mechanism, and the guiding locking mechanism is used to complete the guiding and locking action on the fuse tube 5. At the same time, an auxiliary mechanism is added to the No. 2 branch arm 3, and the auxiliary mechanism is used to assist in the disconnection of the fuse tube 5, and the auxiliary mechanism is linked with the guiding locking mechanism, and the guiding locking mechanism is reinforced and restricted by the auxiliary mechanism; Among them, a semi-ring member 7 is rotatably installed on one side of the No. 2 support arm 3 through a pin shaft, and the semi-ring member 7 is correspondingly arranged on one side of one of the rotating shafts 6. The semi-ring member 7 is used to complete the blocking of the open side of the hook groove 4. The semi-ring member 7 can bypass the semi-ring member 7 through the pin shaft, and one of the rotating shafts 6 is locked by cooperating with the semi-ring member 7 and the hook groove 4. A locking screw 8 is threadedly screwed through one end of the semi-ring member 7, and a No. 1 positioning groove 9 is provided on one side of the No. 2 support arm 3. The bottom of the locking screw 8 is correspondingly inserted into the No. 1 positioning groove 9 to complete the locking. Under the cooperation of the semi-ring member 7 and the limiting mechanism, the limiting work of the two rotating shafts 6 is completed; In the embodiment of the present invention, the limiting mechanism includes an annular member 10 concentrically sleeved on the outside of one of the rotating shafts 6, a wedge block 11 is installed on one side of the annular member 10, and ears 12 are fixedly installed on the top and bottom of the annular member 10, and two guide rods 13 are respectively installed on the top and top of one side of the second support arm 3, and the two guide rods 13 are correspondingly slid through the two ears 12. The outer walls of the two guide rods 13 are provided with threaded areas, and the tops of the two guide rods 13 are screwed with adjusting nuts 14. The adjusting nuts 14 are screwed in the threaded areas. To complete the up and down movement under the guidance, the two guide rods 13 are both sleeved with a return spring 15 on the outside, each return spring 15 is arranged between the support ear 12 and the adjustment nut 14, the return spring 15 is used to push the ring 10 to move toward the second support arm 3, and a retaining ring is fixedly sleeved under the support ear 12 on the outside of the two guide rods 13, the retaining ring is used to limit the position of the ring 10, when the support ear 12 contacts the retaining ring, the ring 10 blocks the rotating shaft 6, and a pull ring is installed on the side of the ring 10 away from the second support arm 3; It is worth mentioning that when limiting the fuse tube 5: by providing a limiting mechanism, first operate the pull ring to move, so that the ring 10 slides under the guidance of the guide rod 13, and compresses the reset spring 15, thereby completing the avoidance of the rotating shaft 6, and then the two rotating shafts 6 on the fuse tube 5 are correspondingly engaged with the hook groove 4 to complete the limitation, and then release the pull ring, and push the ring 10 to reset the rotating shaft 6 through the reset spring 15 to complete the shielding. At the same time, rotate the half ring 7 to bypass the rotating shaft 6 and block the hook groove 4, and then operate the locking screw 8 to insert it into the No. 1 positioning groove 9 to lock it, which further ensures the stability of the fuse tube 5. At the same time, the overall installation and disassembly of the limiting mechanism is convenient, which is conducive to subsequent maintenance.

[0023] Embodiment 2: Based on the guide locking mechanism provided in Embodiment 1, this embodiment provides a further technical solution of the guide locking mechanism.

[0024] like Figures 8 to 10 As shown, the guide locking mechanism includes a plurality of friction members 16 arranged in a circular array on the inner wall of the ring member 10, each friction member 16 is provided with a guide slope 17, and a limiting wall 18 is formed on the side of each friction member 16 away from the guide slope 17. The starting position of the guide slope 17 of each friction member 16 is consistent, and corresponds to the moving direction when the fuse tube 5 falls off, so that the guide slope 17 of the friction member 16 can complete the friction guidance of the fuse tube 5, and a trigger member 19 can be detachably installed on the rotating shaft 6. The trigger member 19 can complete the triggering action by friction contact with the plurality of friction members 16, and the friction guidance and locking operation of the fuse tube 5 are completed by the cooperation of the trigger member 19 and the plurality of friction members 16; It is worth noting that when the fuse tube 5 is frictionally restricted: by providing a guide locking mechanism, when the fuse tube 5 is separated, the fuse tube 5 carries the rotating shaft 6 to rotate in the hook groove 4, and at the same time drives the trigger member 19 to follow up, and pushes the lifting arm 194 out through the push spring 196, so that the friction column 195 and the friction member 16 are in friction contact to complete the deceleration. At the same time, under the action of the guide inclined surface 17 on the friction member 16, the lifting arm 194 is synchronously contracted in the lifting frame 191 and compresses the pushing spring 196, so that the friction force of the friction column 195 gradually increases when sliding on the guide inclined surface 17 of the friction member 16, thereby completing the fuse. The multiple absorption of the kinetic energy of the fuse tube 5, the multiple friction members 16 complete the deceleration and guiding operation on the fuse tube 5 until the fuse tube 5 stops rotating, so that the separation of the fuse tube 5 is more stable, avoiding the problem of impact on the insulator 1, and at the same time, the side wall of the friction member 16 is formed with a limiting wall 18, so when it is blown by the external wind, the fuse tube 5 is pushed to move, but the lifting arm 194 on the trigger member 19 is extended under the action of the pushing spring 196, so the friction column 195 and the lifting arm 194 will contact with the limiting wall 18 to complete the blocking, so that the rotating shaft 6 and the trigger member 19 cannot complete the rotation, thereby completing the fuse tube 5, and at the same time, when the lifting arm 194 contacts the limiting wall 18, the No. 1 trigger plate 22 on the lifting arm 194 will be disturbed by the wind and will apply a driving force to the limiting wall 18, driving the No. 1 trigger plate 22 to move in the No. 1 area 20, and the movement amount is transmitted to the No. 2 trigger plate 24 through the four slide bars 26, so that the No. 2 trigger plate 24 carries a certain pressure and squeezes and contacts the lifting frame 191, so that the lifting arm 194 is stable, avoiding the problem that the lifting arm 194 cannot achieve a good locking effect when it is retracted into the lifting frame 191. After the driving force applied by the No. 1 trigger plate 22 stops, the deformation spring 27 pushes The first trigger plate 22 and the second trigger plate 24 are reset. Since the first trigger plate 22 and the second trigger plate 24 are hidden in the first area 20 and the second area 21 respectively, interference with the rotation guide of the fuse tube 5 is avoided, so that the lifting arm 194 can be smoothly telescopically moved in the lifting frame 191. At the same time, when the fuse tube 5 is subsequently reinstalled with a fuse, the lifting arm 194 is pressed, and then the positioning screw 29 is rotated and inserted into the second positioning groove 30, so that the lifting arm 194 is retracted into the lifting frame 191, which is conducive to the reset of the fuse tube 5. After the reset, the positioning screw 29 can be unlocked again. The overall operation is convenient and fast; In the embodiment of the present invention, the trigger member 19 includes a lifting frame 191, which is open all around. The lifting frame 191 can be detachably fixed on the rotating shaft 6, and a gear ring 192 is fixedly sleeved on the rotating shaft 6. A slide seat 193 is slidably installed in the lifting frame 191, and a lifting arm 194 is detachably fixedly installed on the upper surface of the slide seat 193. The lifting arm 194 slides through the top of the lifting frame 191, and a through hole matching the lifting arm 194 is opened at the top of the lifting frame 191. A friction column 195 is detachably installed on the top of the lifting arm 194. The friction column 195 is in friction contact with the friction member 16, and a push spring 196 is detachably installed between the bottom of the slide seat 193 and the lifting frame 191. The friction column 195 is driven to move toward the friction member 16 by the push spring 196. The elastic coefficient of the push spring 196 can be freely set according to actual working requirements, and the friction column 195 and the lifting arm 194 can contact with the limiting wall 18 to complete the limiting action; Among them, a No. 1 area 20 and a No. 2 area 21 are respectively recessed inwardly on both sides of the lifting arm 194, a No. 1 trigger plate 22 is slidably engaged in the No. 1 area 20, and a No. 1 slideway 23 cooperating with the No. 1 trigger plate 22 is provided at the top and bottom of the No. 1 area 20, and the No. 1 slideway 23 can limit the No. 1 trigger plate 22 in the No. 1 area 20 to prevent the No. 1 trigger plate 22 from moving out of the No. 1 area 20, and a No. 2 trigger plate 24 is slidably engaged in the No. 2 area 21, and a No. 2 slideway 25 cooperating with the No. 2 trigger plate 24 is provided at the top and bottom of the No. 2 area 21, and one side of the No. 2 slideway 25 is openly designed so that the No. 2 trigger plate 24 can move out of the No. 2 area 21, and four slide bars 26 are installed in a rectangular shape between the No. 1 trigger plate 22 and the No. 2 trigger plate 24, so that the No. 1 trigger plate 22 and the No. 2 trigger plate 24 form a whole. Four slide bars 26 are correspondingly slid through the lifting arm 194, and the No. 1 trigger plate 22 and the No. 2 trigger plate 24 are respectively hidden in the No. 1 area 20 and the No. 2 area 21 under normal conditions, and deformation springs 27 are correspondingly sleeved on the outside of the four slide bars 26, each deformation spring 27 is arranged between the No. 1 area 20 and the No. 1 trigger plate 22, and the No. 1 trigger plate 22 and the No. 2 trigger plate 24 are pushed to complete the reset through multiple deformation springs 27, and an adjustment seat 28 is installed on one side of the slide seat 193, and a positioning screw 29 is threadedly screwed on the adjustment seat 28, and a No. 2 positioning groove 30 is opened at the bottom of one side of the lifting frame 191. The positioning screw 29 is correspondingly inserted into the No. 2 positioning groove 30 to complete the locking work. When the positioning screw 29 is inserted into the No. 2 positioning groove 30, the lifting arm 194 is retracted to the lifting frame 191 to complete the avoidance with the friction member 16.

[0025] Embodiment 3: Based on the auxiliary mechanism provided in Embodiment 1, this embodiment provides a further technical solution of the auxiliary mechanism.

[0026] like Figures 11 to 13As shown, the auxiliary mechanism includes a telescopic sleeve 31 installed on one side of the second support arm 3. The top of the telescopic sleeve 31 is open. A slide 32 is slidably engaged in the telescopic sleeve 31. An open area is penetrated and opened on the telescopic sleeve 31. The slide 32 extends to the open area to complete the restriction. A push arm 33 is detachably fixedly installed on one side of the slide 32. A rack 34 is installed on one side of the push arm 33. The length of the rack 34 can be freely increased or decreased according to the swing amplitude of the fuse tube 5. The rack 34 is meshed with the gear ring 192. The bottom of the telescopic sleeve 31 is screwed with an end cover to facilitate subsequent disassembly. It is worth noting that when the fuse tube 5 is assisted to be separated: by providing an auxiliary mechanism, the rack 34 is meshed with the gear ring 192, and the pulling spring 35 provides a pulling force, so that the shaft 6 obtains a torsional force. When the fuse tube 5 is released, the pulling spring 35 pulls the push arm 33 and the rack 34 to reset. The movement of the rack 34 drives the gear ring 192 and the shaft 6 to complete the rotation, so that the fuse tube 5 is quickly released, avoiding the problem of slow separation response. In addition, when the push arm 33 is reset, the roller 38 is pulled to move and contact with the wedge block 11, and the inclined surface of the wedge block 11 is affected. After the roller 38 contacts the wedge block 11, the ring member 10 can be pressed and limited, so that the ring member 10 remains stable during the subsequent friction guidance of the fuse tube 5, avoiding the problem that the ring member 10 is displaced and cannot be guided and locked. When the rack 34 is reset later, it is only necessary to pull the handle to make the rack 34 contact the gear ring 192. Therefore, when the fuse tube 5 is reset, the shaft 6 and the gear ring 192 will rotate, and then push the rack 34 to move, so as to complete the power storage operation of the rack 34, which is beneficial to the subsequent separation of the fuse tube 5. In the embodiment of the present invention, a pulling spring 35 is installed in the telescopic sleeve 31, and the pulling spring 35 is detachably fixedly installed between the slide 32 and the end cover. The push arm 33 is pulled to retract into the telescopic sleeve 31 by the pulling spring 35. An extension rod 36 is detachably fixedly installed on one side of the push arm 33, and an assembly frame 37 is installed at one end of the extension rod 36. A roller 38 is rotatably installed on one side of the assembly frame 37 through a bracket. Under normal circumstances, the roller 38 is separately set from the wedge block 11, and the roller 38 is matched with the wedge block 11. The positioning work of the annular member 10 is completed by squeezing the wedge block 11 by the roller 38, and a handle is installed on the other side of the assembly frame 37.

[0027] The present invention provides a drop-out fuse for high-cold areas, and the specific working principle is as follows: the fuse is fixed in a working position by a perforated sheet, and then the two rotating shafts 6 on the fuse tube 5 are slidably engaged with the second support arm 3 through the hook groove 4, and then the fuse tube 5 is pushed to the first support arm 2 with the fuse to complete the connection, and a limiting mechanism is added to the second support arm 3, and the two rotating shafts 6 can be restricted under the cooperation of the limiting mechanism and the semi-ring member 7, so that the fuse tube 5 obtains a stable state, and the problem of falling off the insulator 1 is avoided, and the overall installation and disassembly are convenient, which is conducive to subsequent maintenance; In addition, a guiding locking mechanism is added to the limiting mechanism. After the fuse tube 5 is separated from the insulator 1, continuous friction guiding is completed through the trigger member 19 and the multiple friction members 16, which can absorb the kinetic potential energy of the fuse tube 5 step by step, reducing the impact damage of the fuse tube 5, and the guiding locking mechanism can swing the fuse tube 5 toward the first arm 2 to complete the locking action, avoiding the problem of damage caused by repeated collisions between the fuse tube 5 and the insulator 1, and improving the safety of the fuse tube 5 after it falls off. At the same time, an auxiliary mechanism is added, which can provide a certain torsional force to the rotating shaft 6, so that the subsequent falling off of the fuse tube 5 is smoother, avoiding the problems of slow separation response and unsatisfactory separation effect, and the auxiliary mechanism can complete the positioning of the guiding locking mechanism, avoiding the displacement of the guiding locking mechanism during friction guidance, making the operation of the fuse safer and reducing the number of safety accidents.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0029] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A drop-out fuse for use in high-cold regions, comprising an insulator (1), a first support arm (2) being mounted on the top of the insulator (1), a second support arm (3) being mounted on the bottom of the insulator (1), hook grooves (4) being symmetrically formed on both sides of the second support arm (3), a fuse tube (5) being restricted on the hook grooves (4) of the second support arm (3), and characterized in that: Two rotating shafts (6) are installed on both sides of the bottom of the fuse tube (5), and a limiting mechanism is added to one side of the second support arm (3), the limiting mechanism is used to complete the limiting action on the rotating shaft (6), and the limiting work of the fuse tube (5) is completed through the limiting mechanism; A guiding locking mechanism is added to the limiting mechanism, and the guiding locking mechanism is used to guide and lock the fuse tube (5). At the same time, an auxiliary mechanism is added to the second support arm (3), and the auxiliary mechanism is used to assist in disconnecting the fuse tube (5). The auxiliary mechanism and the guiding locking mechanism are linked, and the guiding locking mechanism is reinforced and restricted by the auxiliary mechanism.

2. The drop-out fuse for high-cold areas according to claim 1, characterized in that: A semi-ring member (7) is rotatably mounted on one side of the No. 2 support arm (3) via a pin shaft, and one of the rotating shafts (6) is locked by cooperating between the semi-ring member (7) and the hook groove (4), and a locking screw (8) is threadedly screwed through one end of the semi-ring member (7), and a No. 1 positioning groove (9) is provided on one side of the No. 2 support arm (3).

3. The drop-out fuse for high-cold areas according to claim 1, characterized in that: The limiting mechanism comprises an annular member (10) concentrically sleeved on the outside of one of the rotating shafts (6), a wedge block (11) being mounted on one side of the annular member (10), support ears (12) being fixedly mounted on the top and bottom of the annular member (10), and two guide rods (13) being mounted on the top and top of one side of the second support arm (3), respectively, the two guide rods (13) being arranged to slide through the two support ears (12) correspondingly, adjusting nuts (14) being mounted on the tops of the two guide rods (13), and return springs (15) being sleeved on the outsides of the two guide rods (13).

4. The drop-out fuse for high-cold areas according to claim 3, characterized in that: The guide locking mechanism comprises a plurality of friction members (16) arranged in a circular array on the inner wall of a ring member (10), each friction member (16) being provided with a guide inclined surface (17), a limiting wall (18) being formed on a side of each friction member (16) away from the guide inclined surface (17), and a trigger member (19) being detachably mounted on the rotating shaft (6), the trigger member (19) cooperates with the plurality of friction members (16) to complete friction guiding and locking operations on the fuse tube (5).

5. The drop-out fuse for high-cold areas according to claim 4, characterized in that: The trigger member (19) comprises a lifting frame (191), the lifting frame (191) being detachably fixedly mounted on a rotating shaft (6), and a gear ring (192) being fixedly sleeved on the rotating shaft (6), a slide seat (193) being slidably mounted in the lifting frame (191), a lifting arm (194) being mounted on the upper surface of the slide seat (193), the lifting arm (194) being slidably arranged through the top of the lifting frame (191), a friction column (195) being mounted on the top of the lifting arm (194), and a push spring (196) being mounted between the bottom of the slide seat (193) and the lifting frame (191).

6. The drop-out fuse for high-cold areas according to claim 5, characterized in that: A first area (20) and a second area (21) are respectively recessed inwardly provided on both sides of the lifting arm (194); a first trigger plate (22) is slidably engaged in the first area (20); a second trigger plate (24) is slidably engaged in the second area (21); and four slide bars (26) are installed in a rectangular shape between the first trigger plate (22) and the second trigger plate (24); the four slide bars (26) are correspondingly slidably passed through the lifting arm (194); and the first trigger plate (22) and the second trigger plate (24) are respectively hidden in the first area (20) and the second area (21) in a normal state; and deformation springs (27) are correspondingly sleeved on the outside of the four slide bars (26).

7. The drop-out fuse for high-cold areas according to claim 6, characterized in that: An adjusting seat (28) is installed on one side of the slide seat (193), a positioning screw (29) is threadedly screwed through the adjusting seat (28), and a second positioning groove (30) is opened at the bottom of one side of the lifting frame (191).

8. The drop-out fuse for high-cold areas according to claim 7, characterized in that: The auxiliary mechanism comprises a telescopic sleeve (31) mounted on one side of the second support arm (3), a sliding member (32) slidably engaged in the telescopic sleeve (31), a push arm (33) detachably fixedly mounted on one side of the slide member (32), a rack (34) mounted on one side of the push arm (33), and the rack (34) is arranged to mesh with the gear ring (192) in a corresponding manner.

9. The drop-out fuse for high-cold areas according to claim 8, characterized in that: A pulling spring (35) is installed in the telescopic sleeve (31). The pulling spring (35) is detachably fixedly installed between the sliding member (32) and the end cover. The pushing arm (33) is pulled by the pulling spring (35) to be retracted into the telescopic sleeve (31).

10. The drop-out fuse for high-cold areas according to claim 9, characterized in that: An extension rod (36) is detachably fixedly mounted on one side of the push arm (33), an assembly frame (37) is mounted on one end of the extension rod (36), a roller (38) is rotatably mounted on one side of the assembly frame (37) via a bracket, and the roller (38) is arranged in cooperation with the wedge block (11).

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