Double-break vacuum circuit breaker

Abstract

The double-break vacuum circuit breaker comprises a tank body assembly, a transmission case, a first vacuum arc-extinguishing chamber, a second vacuum arc-extinguishing chamber, an adjusting assembly and a hard connecting piece, the tank body assembly is provided with a containing cavity, the transmission case is contained in the containing cavity, and the transmission case is provided with a first conductive seat and a second conductive seat which are oppositely arranged in the left-right direction; the first vacuum arc-extinguishing chamber and the second vacuum arc-extinguishing chamber are both arranged in the transmission case, the first vacuum arc-extinguishing chamber is provided with a first movable end and a first static end, the first movable end penetrates through the first conductive seat, the second vacuum arc-extinguishing chamber is provided with a second movable end and a second static end, the second movable end penetrates through the second conductive seat, and the second static end penetrates through the second conductive seat. The adjusting assembly is used for enabling the first vacuum arc-extinguishing chamber and the second vacuum arc-extinguishing chamber to move left and right relative to the transmission case so as to adjust the distance between the first static end and the second static end, the two ends of the hard connecting piece are connected with the first conductive base and the second conductive base respectively, the breaking capacity can be improved, and the high-voltage-grade and large-current working conditions can be used.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a double-break vacuum circuit breaker. Background Art

[0002] Circuit breakers are electrical equipment that ensures the safe and reliable operation of power grids and are important unit components in high-voltage GIS equipment. According to the current operation experience of power grids, the probability of reignition of vacuum circuit breakers when switching capacitor banks is still high. The reignition rate is: when the circuit breaker is opened and the contacts are disconnected, an arc will be generated between the contacts. A relatively high voltage is required to generate an arc, while a relatively low voltage is required to maintain the existence of the arc. The arc is often extinguished when the current passes through zero. At this time, if the dielectric insulation strength between the contacts is greater than the arc maintenance voltage between the contacts, the arc will be extinguished. Otherwise, if the dielectric insulation strength between the contacts is less than the arc maintenance voltage between the contacts, the dielectric will be broken down, the arc will burn again, and the arc will reignite. The heat generated by the reignition of the arc is large, which can easily cause damage to the circuit breaker or generate overvoltage in the system. Due to the frequent operation of the capacitor bank switch, frequent faults occur in the system, which brings serious harm to the power equipment and also limits the application of vacuum circuit breakers in this regard. Therefore, innovating a new vacuum circuit breaker to solve the problem of high reignition rate of capacitor banks switched by vacuum circuit breakers is an urgent issue to be solved for the safe operation of the power grid.

[0003] With the development of technology, double-break circuit breakers have emerged. The breaking capacity of the double-break arrangement is more than twice that of the single-break breaking capacity. Existing double-break circuit breakers generally achieve breaking by setting two vacuum interrupters in series, but the two vacuum interrupters are connected by soft connections such as copper foil and copper braids, resulting in double-break circuit breakers being only suitable for low voltage levels and low current conditions, and not for high voltage levels and high current conditions. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a double-break vacuum circuit breaker, which can XX.

[0005] According to an embodiment of the utility model, a double-break vacuum circuit breaker includes a tank assembly, a transmission box, a first vacuum arc extinguishing chamber, a second vacuum arc extinguishing chamber, an adjustment assembly and a hard connector, the tank assembly is provided with a accommodating cavity, the transmission box is accommodated in the accommodating cavity, the transmission box is provided with a first conductive seat and a second conductive seat arranged opposite to each other in the left and right directions, the first vacuum arc extinguishing chamber and the second vacuum arc extinguishing chamber are arranged in the transmission box, the first vacuum arc extinguishing chamber has a first moving end and a first static end, the first moving end is penetrated through the first conductive seat, the second vacuum arc extinguishing chamber has a second moving end and a second static end, the second moving end is penetrated through the second conductive seat, the adjustment assembly is arranged in the transmission box, the adjustment assembly is used to make the first moving end and the second moving end move left and right relative to the transmission box to adjust the distance between the first moving end and the second moving end, the hard connector is arranged in the transmission box, and the two ends of the hard connector are respectively connected to the first conductive seat and the second conductive seat.

[0006] The double-break vacuum circuit breaker according to the embodiment of the utility model has at least the following beneficial effects:

[0007] The accommodating cavity is filled with environmentally friendly gases such as high-voltage insulating air. The user can move the adjusting component to make the first vacuum arc chamber and the second vacuum arc chamber realize simultaneous disconnection. Since the first movable end is movably arranged on the first conductive seat, and the first movable end can be conductively contacted with the first conductive seat, the second movable end is movably arranged on the second conductive seat, and the second movable end can be conductively contacted with the second conductive seat, the two ends of the hard connector are respectively fixedly connected to the first conductive seat and the second conductive seat, so that the first vacuum arc chamber and the second vacuum arc chamber are connected in series through the cooperation between the first conductive seat, the hard connector and the second conductive seat, which can abandon the traditional technical solution of using soft connection components such as wires to connect the first vacuum arc chamber and the second vacuum arc chamber in series, so that the double-disconnection vacuum circuit breaker can not only improve the breaking capacity, but also can be used in high voltage levels and large current conditions.

[0008] According to some embodiments of the utility model, the adjusting assembly includes an adjusting member, a first connecting rod and a second connecting rod, the adjusting member is movably arranged in the transmission box and the tank assembly, one end of the first connecting rod is hinged to the first moving end, the other end of the first connecting rod is hinged to the adjusting member, one end of the second connecting rod is hinged to the second moving end, and the other end of the second connecting rod is hinged to the adjusting member.

[0009] According to some embodiments of the present invention, a first guide structure is provided between the first connecting rod and the transmission box, and a second guide structure is provided between the second connecting rod and the transmission box.

[0010] According to some embodiments of the utility model, the first guide structure includes a first guide rod and a first guide hole provided in the transmission box, the first guide rod is movably inserted into the first guide hole, one end of the first connecting rod is rotatably mounted on the first guide rod, and the first movable end is connected to the first guide rod.

[0011] According to some embodiments of the utility model, the second guide structure includes a second guide rod and a second guide hole provided in the transmission box, the second guide rod is movably inserted into the second guide hole, one end of the second connecting rod is rotatably mounted on the second guide rod, and the second movable end is connected to the second guide rod.

[0012] According to some embodiments of the utility model, a third guide structure is provided between the adjusting member and the transmission box.

[0013] According to some embodiments of the utility model, the third guide structure includes a third guide rod and a third guide hole provided in the transmission box, the third guide rod is movably inserted into the third guide hole, the other end of the first connecting rod and the other end of the second connecting rod are rotatably mounted on the third guide rod, and the adjusting member is connected to the third guide rod.

[0014] According to some embodiments of the utility model, the first conductive seat is provided with a first overlapping surface, the second conductive seat is provided with a second overlapping surface, and the two ends of the hard connector are respectively provided with a third overlapping surface and a fourth overlapping surface, the first overlapping surface overlaps the third overlapping surface, and the second overlapping surface overlaps the fourth overlapping surface.

[0015] According to some embodiments of the utility model, the first vacuum arc extinguishing chamber is provided with a plurality of first pressure-equalizing shielding covers, which are arranged side by side and spaced apart from each other on the left and right sides; the second vacuum arc extinguishing chamber is provided with a plurality of second pressure-equalizing shielding covers, which are arranged side by side and spaced apart from each other on the left and right sides.

[0016] According to some embodiments of the utility model, it also includes at least two first equalizing capacitor modules and at least two second equalizing capacitor modules, multiple first equalizing capacitor shielding covers are electrically connected through the first equalizing capacitor modules, at least two of the first equalizing capacitor modules are arranged at circumferential intervals along the first equalizing capacitor shielding cover, multiple second equalizing capacitor shielding covers are electrically connected through the second equalizing capacitor modules, and at least two of the second equalizing capacitor modules are arranged at circumferential intervals along the second equalizing capacitor shielding cover.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 A schematic diagram of the structure of a double-break vacuum circuit breaker according to an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of the internal structure of a double-break vacuum circuit breaker according to an embodiment of the utility model;

[0021] Figure 3 It is a structural schematic diagram of a double-break vacuum circuit breaker of an embodiment of the utility model when the tank assembly is hidden;

[0022] Figure 4 It is a schematic diagram of the assembly of the transmission box, the adjustment assembly, the first vacuum interrupter and the second vacuum interrupter of the embodiment of the utility model;

[0023] Figure 5 It is a schematic diagram of assembling the regulating assembly, the first vacuum interrupter and the second vacuum interrupter of an embodiment of the utility model;

[0024] Figure 6 for Figure 5 A partial enlarged view of part A;

[0025] Figure 7 It is a schematic structural diagram of the first conductive seat or the second conductive seat of an embodiment of the utility model;

[0026] Figure 8 This is a schematic structural diagram of a hard connector according to an embodiment of the utility model.

[0027] Reference numerals:

[0028] Tank assembly 100, accommodating chamber 110;

[0029] Transmission box 200, first conductive seat 210, first lap joint surface 211, first through hole 212, second conductive seat 220, second lap joint surface 221, second through hole 222, first guide hole 230, second guide hole 240, third guide hole 250, heat dissipation hole 260;

[0030] A first vacuum interrupter 300, a first moving end 310, and a first static end 320;

[0031] A second vacuum interrupter 400, a second moving end 410, and a second static end 420;

[0032] The adjusting assembly 500, the adjusting member 510, the first connecting rod 520, the second connecting rod 530, the first guiding rod 540, the first limiting member 541, the second guiding rod 550, the second limiting member 551, the third guiding rod 560, the third limiting member 561, the pulling member 570, and the buffer member 580;

[0033] Hard connector 600, third lap joint surface 610, fourth lap joint surface 620;

[0034] A first voltage balancing shield 710, a second voltage balancing shield 720, a first voltage balancing capacitor module 730, and a second voltage balancing capacitor module 740;

[0035] A first pot-type insulator 810 and a second pot-type insulator 820 . DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0040] Reference Figure 1 , Figure 2According to the double-break vacuum circuit breaker of the embodiment of the utility model, it includes a tank assembly 100, a transmission box 200, a first vacuum interrupter 300, a second vacuum interrupter 400, an adjustment assembly 500 and a hard connector 600, the tank assembly 100 is provided with a receiving chamber 110, the transmission box 200 is accommodated in the receiving chamber 110, the transmission box 200 is provided with a first conductive seat 210 and a second conductive seat 220 arranged opposite to each other in the left and right directions, the first vacuum interrupter 300 and the second vacuum interrupter 400 are arranged in the transmission box 200, the first vacuum interrupter 300 has a first moving end 310 and a first static end 320, the first moving end 310 is penetrated in the first conductive seat 210, the second vacuum interrupter 400 has a second moving end 410 and a second static end 420, the second moving end 410 is penetrated in the second conductive seat 220, the adjustment assembly Component 500 is arranged on transmission box 200, and adjustment component 500 is used to make the first movable end 310 and the second movable end 410 move left and right relative to transmission box 200 to adjust the distance between the first movable end 310 and the second movable end 4100, and hard connection component 600 is arranged on transmission box 200, and the two ends of hard connection component 600 are respectively connected with the first conductive seat 210 and the second conductive seat 220, so that the first vacuum arc chamber 300 and the second vacuum arc chamber 400 are connected in series through the cooperation between the first conductive seat 210, the hard connection component 600 and the second conductive seat 220, and the traditional technical scheme of using soft connection components such as copper foil and copper braided belt to connect the first vacuum arc chamber 300 and the second vacuum arc chamber 400 in series can be abandoned, so that the double-disconnection vacuum circuit breaker can not only improve the breaking capacity, but also can use high voltage level and large current conditions.

[0041] Specifically, the accommodating cavity 110 is filled with environmentally friendly gases such as high-voltage insulating air. The user can move the adjustment component 500 to enable the first vacuum interrupter 300 and the second vacuum interrupter 400 to be disconnected simultaneously. Since the first movable end 310 is movably arranged on the first conductive seat 210, and the first movable end 310 can be conductively contacted with the first conductive seat 210, and the second movable end 410 is movably arranged on the second conductive seat 220, and the second movable end 410 can be conductively contacted with the second conductive seat 220, the hard connector 6 The two ends of 00 are respectively fixedly connected to the first conductive seat 210 and the second conductive seat 220, so that the first vacuum arc chamber 300 and the second vacuum arc chamber 400 are connected in series through the cooperation between the first conductive seat 210, the hard connector 600 and the second conductive seat 220, which can abandon the traditional technical solution of using soft connection components such as wires to connect the first vacuum arc chamber 300 and the second vacuum arc chamber 400 in series, so that the double-disconnect vacuum circuit breaker can not only improve the breaking capacity, but also can use high voltage levels and large current conditions.

[0042] It should be noted that, refer to Figure 7The first conductive seat 210 is provided with a first through hole 212, the second conductive seat 220 is provided with a second through hole 222, the first movable end 310 is passed through the first through hole 212, and the first movable end 310 is sleeved with a first spring contact finger, the first movable end 310 is electrically connected to the first conductive seat 210 through the first spring contact finger, the second movable end 410 is passed through the second through hole 222, and the second movable end 410 is sleeved with a second spring contact finger, the second movable end 410 is electrically connected to the second conductive seat 220 through the second spring contact finger, which can improve the conductive stability between the first movable end 310 and the first conductive seat 210, and improve the conductive stability between the second movable end 410 and the second conductive seat 220, which will not be described in detail herein.

[0043] It should be pointed out that, referring to Figure 1 , Figure 2 The two ends of the tank assembly 100 are respectively connected to the first pot-type insulator 810 and the second pot-type insulator 820, the first static end 320 contacts the first pot-type insulator 810, and the second static end 420 contacts the second pot-type insulator 820. When the double-break vacuum circuit breaker is in the closed state, the first moving end 310 contacts the first static end 320, and a high-voltage current can be input from the first pot-type insulator 810. The high-voltage current passes through the first static end 320, the first moving end 310, the first conductive seat 210, the hard connector 600, the second conductive seat 220, and the second moving end 420 in sequence. The first movable end 310 and the second movable end 410 are connected to each other by the movable adjustment component 500, and the second movable end 410 is connected to the second static end 420. The double-break vacuum circuit breaker is output from the second pot-type insulator 820. When the double-break vacuum circuit breaker is in the open state, the first movable end 310 is disconnected from the first static end 320, and the second movable end is disconnected from the second static end 420. The operator can move the adjustment component 500 to make the first movable end 310 and the second movable end 410 approach or move away from each other, so that the double-break vacuum circuit breaker can be switched between the closed state and the open state, and the synchronous breaking of the first vacuum interrupter 300 and the second vacuum interrupter 400 can be achieved. It will not be described in detail here.

[0044] It is understandable that the hard connector 600 is a structure such as a conductive rod or a conductive bar, and the hard connector 600 can be made of a conductive material such as copper or silver, which is not limited here.

[0045] Reference Figures 4 to 6 In some embodiments of the utility model, the adjusting assembly 500 includes an adjusting member 510, a first connecting rod 520 and a second connecting rod 530. The adjusting member 510 is movably arranged in the transmission box 200 and the tank assembly 100. One end of the first connecting rod 520 is hinged to the first movable end 310, and the other end of the first connecting rod 520 is hinged to the adjusting member 510. One end of the second connecting rod 530 is hinged to the second movable end 410, and the other end of the second connecting rod 530 is hinged to the adjusting member 510, so as to realize the synchronous opening and closing of the first vacuum arc chamber 300 and the second vacuum arc chamber 400.

[0046] Specifically, the transmission box 200 is a T-shaped structure, and the transmission box 200 has a first end, a second end and a third end. The first end and the second end are arranged opposite to each other in the left-right direction. The first conductive seat 210 is arranged at the first end, and the second conductive seat 220 is arranged at the second end. The adjusting member 510 is passed through the third end. The two ends of the first connecting rod 520 are respectively hinged to the first movable end 310 and the adjusting member 510, and the two ends of the second connecting rod 530 are respectively hinged to the second movable end 410 and the adjusting member 510. When the adjusting member 510 moves, the first static end 320 and the second static end 420 can approach or move away from each other, so that the double-disconnect vacuum circuit breaker can switch between the closed state and the open state, and the synchronous opening and closing of the first vacuum arc chamber 300 and the second vacuum arc chamber 400 can be realized.

[0047] It should be noted that the adjustment component 500 can also be a matching structure of a first rack, a second rack and a gear. The first rack and the second rack are arranged opposite to each other. The first rack is movably arranged at the first end, and the first rack is connected to the first movable end 310. The second rack is movably arranged at the second end, and the second rack is connected to the second movable end 410. The gear is located between the first rack and the second rack, and the gear is respectively engaged with the first rack and the second rack. When the gear rotates, it can also drive the first static end and the second static end 420 to approach or move away from each other, so as to realize the synchronous opening and closing of the first vacuum arc chamber 300 and the second vacuum arc chamber 400. There is no limitation here.

[0048] It should be noted that the transmission box 200 is provided with a plurality of heat dissipation holes 260. The connection between the first conductive seat 210 and the second conductive seat 220 and the hard connector 600 is likely to generate a large amount of heat in the transmission box 200. By providing a plurality of heat dissipation holes 260, the heat in the transmission box 200 can be quickly transferred to the accommodating cavity 110, so that the double-break vacuum circuit breaker can be suitable for large current working conditions, which will not be described in detail here.

[0049] It should be pointed out that the adjustment assembly 500 also includes a pulling member 570, and a buffer member 580 is provided between one end of the pulling member 570 and the adjustment member 510, and one end of the buffer member 580 is connected to the pulling member 570, and the other end of the buffer member 580 is connected to the end of the adjustment member 510 away from the first connecting rod 520, and the end of the pulling member 570 away from the adjustment member 510 is penetrated through the tank assembly 100 and extends out of the tank assembly 100, so that when the operator pulls the adjustment member 510 to move through the pulling member 570, the buffer member 580 can reduce the impact of the adjustment member 510, and can smoothly realize the disconnection of the first vacuum interrupter 300 and the second vacuum interrupter 400, which will not be described in detail here. It can be understood that the buffer member 580 is a structure that can undergo axial elastic deformation, such as a compression spring or a rubber member, and is not limited here.

[0050] Reference Figures 4 to 6 In some embodiments of the utility model, a first guide structure is provided between the first connecting rod 520 and the transmission box 200, and a second guide structure is provided between the second connecting rod 530 and the transmission box 200. The first guide structure can guide the first connecting rod 520, and the second guide structure can guide the second connecting rod 530, so that the first vacuum arc chamber 300 and the second vacuum arc chamber 400 can move on the same straight line, so that the first vacuum arc chamber 300 and the second vacuum arc chamber 400 can be opened synchronously.

[0051] Reference Figures 4 to 6 In some embodiments of the utility model, the first guide structure includes a first guide rod 540 and a first guide hole 230 provided in the transmission box 200, the first guide rod 540 is movably inserted into the first guide hole 230, one end of the first connecting rod 520 is rotatably sleeved on the first guide rod 540, the first movable end 310 is connected to the first guide rod 540, and the first connecting rod 520 can be guided to move the first vacuum arc chamber 300 in the left and right directions, which can improve the movement stability of the first vacuum arc chamber 300, so that the first static end 320 can stably contact the first basin insulator 810.

[0052] Specifically, first guide holes 230 are respectively provided on the opposite sides of the transmission box 200, and the first guide holes 230 are waist-shaped hole structures. Both ends of the first guide rod 540 are respectively passed through the corresponding first guide holes 230, and the diameter of the first guide hole 230 matches the width of the first guide hole 230. One end of the first connecting rod 520 is rotatably mounted on the first guide rod 540, and the first movable end 310 is connected to the first guide rod 540, which can guide the first connecting rod 520 so that the first vacuum arc chamber 300 moves in the left and right directions, thereby improving the movement stability of the first vacuum arc chamber 300, so that the first static end 320 can stably contact the first basin insulator 810.

[0053] It should be noted that the first guide structure may also be a structure in which a guide groove and a guide pin cooperate, which will not be described in detail here.

[0054] It should be pointed out that the two ends of the first guide rod 540 extend out of the corresponding first guide holes 230 respectively, and the two ends of the first guide rod 540 are respectively connected with the first limiting members 541, and the first limiting members 541 can abut against the periphery of the corresponding first guide hole 230. The first limiting members 541 are connected to the first guide rod 540 by threaded connection or clamping, which can facilitate the assembly of the first guide rod 540, which will not be described in detail here.

[0055] Reference Figures 4 to 6In some embodiments of the utility model, the second guide structure includes a second guide rod 550 and a second guide hole 240 provided in the transmission box 200, the second guide rod 550 is movably inserted into the second guide hole 240, one end of the second connecting rod 530 is rotatably sleeved on the second guide rod 550, the second movable end 410 is connected to the second guide rod 550, and can guide the first connecting rod 520 so that the first vacuum arc chamber 300 moves in the left and right directions, which can improve the movement stability of the second vacuum arc chamber 400, so that the second static end 420 can stably contact the second basin insulator 820.

[0056] Specifically, second guide holes 240 are respectively provided on the opposite sides of the transmission box 200, and the second guide holes 240 are waist-shaped hole structures. Both ends of the second guide rod 550 are respectively passed through the corresponding second guide holes 240, and the diameter of the second guide hole 240 matches the width of the second guide hole 240. One end of the second connecting rod 530 is rotatably mounted on the second guide rod 550, and the second movable end 410 is connected to the second guide rod 550, which can guide the second connecting rod 530 so that the second vacuum arc chamber 400 moves in the left and right directions, thereby improving the movement stability of the second vacuum arc chamber 400, so that the second static end 420 can stably contact the second pot-type insulator 820.

[0057] It should be noted that the length direction of the first guide hole 230 is parallel to the length direction of the second guide hole 240 , which will not be described in detail herein.

[0058] It should be noted that the second guide structure may also be a structure in which a guide groove and a guide pin cooperate, which will not be described in detail here.

[0059] It should be pointed out that the two ends of the second guide rod 550 extend out of the corresponding second guide holes 240 respectively, and the two ends of the second guide rod 550 are respectively connected with second limit members 551, and the second limit members 551 can abut against the periphery of the corresponding second guide hole 240. The second limit members 551 are connected to the second guide rod 550 by threaded connection or clamping, which can facilitate the assembly of the second guide rod 550, which will not be described in detail here.

[0060] Reference Figures 4 to 6 In some embodiments of the utility model, a third guide structure is provided between the adjusting member 510 and the transmission box 200, and the third guide structure can guide the adjusting member 510 so that the adjusting member 510 moves along a preset direction, so that the adjusting member 510 can stably adjust the distance between the first static end 320 and the second static end 420, and can facilitate the switching of the double-break vacuum circuit breaker between the closed state and the open state.

[0061] Reference Figures 4 to 6In some embodiments of the utility model, the third guide structure includes a third guide rod 560 and a third guide hole 250 provided in the transmission box 200. The third guide rod 560 is movably inserted into the third guide hole 250. The other end of the first connecting rod 520 and the other end of the second connecting rod 530 are rotatably sleeved on the third guide rod 560. The adjusting member 510 is connected to the third guide rod 560, and can guide the adjusting member 510 to move along a preset direction, so that the adjusting member 510 can stably adjust the distance between the first static end 320 and the second static end 420, and can facilitate the switching of the double-break vacuum circuit breaker between the closed state and the open state.

[0062] Specifically, third guide holes 250 are respectively provided on the opposite sides of the transmission box 200, and the third guide holes 250 are waist-shaped hole structures. Both ends of the third guide rod 560 are respectively passed through the corresponding third guide holes 250, and the diameter of the third guide hole 250 matches the width of the third guide hole 250. One end of the third connecting rod is rotatably mounted on the third guide rod 560, and the third moving end is connected to the third guide rod 560, which can guide the third connecting rod so that the third vacuum arc chamber moves in the left and right directions, thereby improving the movement stability of the third vacuum arc chamber, so that the third static end can stably contact the third basin insulator.

[0063] It should be noted that the length direction of the third guide hole 250 is perpendicular to the length direction of the first guide hole 230 , which will not be described in detail herein.

[0064] It should be noted that the third guide structure may also be a structure in which a guide groove and a guide pin cooperate, which will not be described in detail here.

[0065] It should be pointed out that the two ends of the third guide rod 560 extend out of the corresponding third guide holes 250 respectively, and the two ends of the third guide rod 560 are respectively connected with third limiting members 561, and the third limiting members 561 can abut against the periphery of the corresponding third guide hole 250. The third limiting members 561 are connected to the third guide rod 560 by threaded connection or clamping, which can facilitate the assembly of the third guide rod 560, which will not be described in detail here.

[0066] Reference Figure 6 , Figure 8In some embodiments of the utility model, the first conductive seat 210 is provided with a first overlapping surface 211, and one end of the hard connector 600 is provided with a third overlapping surface 610, the first overlapping surface 211 overlaps the third overlapping surface 610, the second conductive seat 220 is provided with a second overlapping surface 221, and the two ends of the hard connector 600 are respectively provided with the third overlapping surface 610 and the fourth overlapping surface 620, the first overlapping surface 211 overlaps the third overlapping surface 610, and the second overlapping surface 221 overlaps the fourth overlapping surface 620, which can improve the connection stability between the first conductive seat 210 and the hard connector 600, and improve the connection stability between the second conductive seat 220 and the hard connector 600, so as to reduce the number of failures of the double-break vacuum circuit breaker and improve the use reliability of the double-break vacuum circuit breaker.

[0067] Specifically, the first conductive seat 210 is connected to one end of the hard connector 600 by bolting, and the second conductive seat 220 is connected to the other end of the hard connector 600 by bolting. The first lap surface 211, the second lap surface 221, the third lap surface 610 and the fourth lap surface 620 are all planar structures. The first lap surface 211 abuts against the third lap surface 610, and the second lap surface 221 abuts against the fourth lap surface 620, which can increase the contact area between the hard connector 600 and the first conductive seat 210 and the second conductive seat 220, improve the connection stability between the first conductive seat 210 and the hard connector 600, and improve the connection stability between the second conductive seat 220 and the hard connector 600, so as to reduce the number of failures of the double-break vacuum circuit breaker and improve the reliability of the use of the double-break vacuum circuit breaker.

[0068] It should be noted that, in some specific implementations, the first overlapping surface 211 , the second overlapping surface 221 , the third overlapping surface 610 , and the fourth overlapping surface 620 may also be arcuate structures, which is not limited here.

[0069] Reference Figure 2 , Figure 3 In some embodiments of the utility model, the first vacuum arc extinguishing chamber 300 is provided with a plurality of first voltage-equalizing shielding covers 710, which are arranged side by side and spaced apart from each other on the left and right sides; the second vacuum arc extinguishing chamber 400 is provided with a plurality of second voltage-equalizing shielding covers 720, which are arranged side by side and spaced apart from each other on the left and right sides, which can reduce the unevenness of the electric field strength to make the electric field uniform, thereby improving the safety and stability of the electrical structure.

[0070] Specifically, the first voltage-equalizing shielding cover 710 and the second voltage-equalizing shielding cover 720 are both annular structures. Multiple first voltage-equalizing shielding covers 710 are mounted in the first vacuum arc extinguishing chamber 300, and multiple second voltage-equalizing shielding covers 720 are mounted in the second vacuum arc extinguishing chamber 400, which can reduce the unevenness of the electric field strength to make the electric field uniform, thereby improving the safety and stability of the electrical structure.

[0071] Reference Figure 2 , Figure 3 In some embodiments of the utility model, it also includes two first equalizing capacitor modules 730 and two second equalizing capacitor modules 740, multiple first equalizing capacitor shielding covers 710 are electrically connected through the first equalizing capacitor module 730, and the two first equalizing capacitor modules 730 are arranged at intervals along the circumference of the first equalizing shielding cover 710, multiple second equalizing shielding covers 720 are electrically connected through the second equalizing capacitor module 740, and the two second equalizing capacitor modules 740 are arranged at intervals along the circumference of the second equalizing shielding cover 720. When any of the two first equalizing capacitor modules 730 fails, the other first equalizing capacitor module 730 can still be improved.

[0072] Of course, in some specific implementations, the first voltage-equalizing capacitor modules 730 may be configured with three or four, and the second voltage-equalizing capacitor modules 740 may be configured with three or four, etc., which is not limited here.

[0073] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The embodiment is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiment, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the present purpose.

Claims

1. A double-break vacuum circuit breaker, characterized in that: include: The tank assembly (100) is provided with a receiving chamber (110); A transmission box (200) is accommodated in the accommodating chamber (110), wherein the transmission box (200) is provided with a first conductive seat (210) and a second conductive seat (220) which are arranged opposite to each other in a left-right direction; The first vacuum interrupter (300) and the second vacuum interrupter (400) are both arranged in the transmission box (200), the first vacuum interrupter (300) having a first moving end (310) and a first static end (320), the first moving end (310) being inserted through the first conductive seat (210), the second vacuum interrupter (400) having a second moving end (410) and a second static end (420), the second moving end (410) being inserted through the second conductive seat (220); an adjusting component (500) disposed on the transmission box (200), the adjusting component (500) being used to move the first movable end (310) and the second movable end (410) leftward and rightward relative to the transmission box (200) so as to adjust the distance between the first movable end (310) and the second movable end (410); A hard connector (600) is provided on the transmission box (200), and two ends of the hard connector (600) are respectively connected to the first conductive seat (210) and the second conductive seat (220).

2. The double-break vacuum circuit breaker according to claim 1, characterized in that: The adjusting assembly (500) comprises an adjusting member (510), a first connecting rod (520) and a second connecting rod (530); the adjusting member (510) is movably arranged in the transmission box (200) and the tank assembly (100); one end of the first connecting rod (520) is hinged to the first movable end (310); the other end of the first connecting rod (520) is hinged to the adjusting member (510); one end of the second connecting rod (530) is hinged to the second movable end (410); and the other end of the second connecting rod (530) is hinged to the adjusting member (510).

3. The double-break vacuum circuit breaker according to claim 2, characterized in that: A first guide structure is provided between the first connecting rod (520) and the transmission box (200), and a second guide structure is provided between the second connecting rod (530) and the transmission box (200).

4. The double-break vacuum circuit breaker according to claim 3, characterized in that: The first guide structure comprises a first guide rod (540) and a first guide hole (230) provided in the transmission box (200); the first guide rod (540) is movably inserted into the first guide hole (230); one end of the first connecting rod (520) is rotatably sleeved on the first guide rod (540); and the first movable end (310) is connected to the first guide rod (540).

5. The double-break vacuum circuit breaker according to claim 3, characterized in that: The second guide structure comprises a second guide rod (550) and a second guide hole (240) provided in the transmission box (200); the second guide rod (550) is movably inserted into the second guide hole (240); one end of the second connecting rod (530) is rotatably sleeved on the second guide rod (550); and the second movable end (410) is connected to the second guide rod (550).

6. The double-break vacuum circuit breaker according to claim 2, characterized in that: A third guide structure is provided between the adjusting member (510) and the transmission box (200).

7. The double-break vacuum circuit breaker according to claim 6, characterized in that: The third guide structure comprises a third guide rod (560) and a third guide hole (250) provided on the transmission box (200); the third guide rod (560) is movably inserted into the third guide hole (250); the other end of the first connecting rod (520) and the other end of the second connecting rod (530) are both rotatably sleeved on the third guide rod (560); and the adjusting member (510) is connected to the third guide rod (560).

8. The double-break vacuum circuit breaker according to claim 1, characterized in that: The first conductive seat (210) is provided with a first overlapping surface (211), the second conductive seat (220) is provided with a second overlapping surface (221), and the two ends of the hard connector (600) are respectively provided with a third overlapping surface (610) and a fourth overlapping surface (620), the first overlapping surface (211) overlaps with the third overlapping surface (610), and the second overlapping surface (221) overlaps with the fourth overlapping surface (620).

9. The double-break vacuum circuit breaker according to claim 1, characterized in that: The first vacuum interrupter (300) is provided with a plurality of first voltage-equalizing shielding covers (710), and the plurality of first voltage-equalizing shielding covers (710) are arranged side by side and spaced apart from each other on the left and right sides; the second vacuum interrupter (400) is provided with a plurality of second voltage-equalizing shielding covers (720), and the plurality of second voltage-equalizing shielding covers (720) are arranged side by side and spaced apart from each other on the left and right sides.

10. The double-break vacuum circuit breaker according to claim 9, characterized in that: It also includes at least two first voltage-equalizing capacitor modules (730) and at least two second voltage-equalizing capacitor modules (740), multiple first voltage-equalizing shielding covers (710) are electrically connected through the first voltage-equalizing capacitor module (730), at least two of the first voltage-equalizing capacitor modules (730) are arranged at intervals along the circumference of the first voltage-equalizing shielding cover (710), multiple second voltage-equalizing shielding covers (720) are electrically connected through the second voltage-equalizing capacitor module (740), and at least two of the second voltage-equalizing capacitor modules (740) are arranged at intervals along the circumference of the second voltage-equalizing shielding cover (720).

Images