Outdoor high-voltage primary and secondary integrated complete set pole circuit breaker

Abstract

The application relates to the technical field of circuit breakers, in particular to an outdoor high-voltage primary and secondary fusion integrated pole-mounted circuit breaker, which comprises a mechanism box, three arc extinguishing chambers uniformly fixed on the top of the mechanism box, fixed contacts fixed on the top of the three arc extinguishing chambers, movable contacts slidingly installed at the bottom of the three arc extinguishing chambers, and a transmission device installed in the mechanism box, an insulating pull rod is threadedly connected to the bottom of each of the three movable contacts, an annular limiting groove is formed in the bottom of each of the three movable contacts, a supporting mechanism is arranged in the top end of the mechanism box, and an auxiliary mechanism is arranged between the side plate one and the side plate two. The application has the beneficial effect of solving the problem that, when the damaged insulating pull rod is replaced, the movable contact at the top is touched and moves upwards, thereby causing the movable contact to collide with other components and be damaged, and avoiding the influence on the stroke calibration accuracy in the subsequent arc extinguishing chamber.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit breakers, in particular to an outdoor high-voltage primary and secondary integrated complete set of pole-mounted circuit breaker. BACKGROUND

[0002] The primary and secondary integrated complete set of pole-mounted circuit breaker is a key integrated and intelligent device in a power distribution network, mainly applied to overhead lines of 10k and below voltage levels, and is responsible for short-circuit protection, overload protection, fault isolation, remote monitoring, data acquisition and other functions. The core feature is the deep integration of traditional "primary equipment" and "secondary equipment", realizing the miniaturization, intelligentization and integrated operation of the device.

[0003] When the current transformer in the pole-mounted circuit breaker detects abnormal current, it will trigger the transmission device inside the mechanism box to move the main shaft horizontally, and then pull the moving contact in the arc extinguishing chamber downward by an insulating pull rod, so that the moving contact is separated from the static contact. One of the core functions of the insulating pull rod is to isolate high voltage from the grounding end (or different potential components). When cracks, damage, delamination, carbonization marks (such as arc burning black marks) appear on the surface of the insulating pull rod, or the insulating layer is deteriorated due to long-term dampness and oil pollution, its insulation performance is not up to standard and it must be replaced. When replacing the insulating pull rod, the pole-mounted circuit breaker needs to be in the open state, at which time the moving contact is separated downward from the static contact. After the insulating pull rod and the moving contact are separated, the moving contact is in a vertical falling state, and its bottom is not supported or limited. During the replacement of the insulating pull rod, the moving contact is easily touched and moved upward, causing the internal parts of the arc extinguishing chamber (such as the static contact and the nozzle) to collide and be damaged, thereby affecting the subsequent travel calibration accuracy of the arc extinguishing chamber. In addition, the structure connected to the bottom of the insulating pull rod in the transmission device needs to be repeatedly adjusted and positioned when connected to the insulating pull rod, which increases the time for replacing the insulating pull rod. SUMMARY

[0004] The purpose of the present application is to provide an outdoor high-voltage primary and secondary integrated complete set of pole-mounted circuit breaker to solve the problems raised in the background art.

[0005] In order to achieve the above object, the present application provides the following technical scheme: an outdoor high-voltage primary and secondary fusion complete set pole circuit breaker, comprising a mechanism box, three arc extinguishing chambers uniformly fixed on the top of the mechanism box, fixed contacts fixed on the top of the three arc extinguishing chambers, movable contacts slidingly installed at the bottom of the three arc extinguishing chambers, and a transmission device installed in the mechanism box, the bottom of each of the three movable contacts is threadedly connected with an insulating pull rod, the two sides of each of the three insulating pull rods are correspondingly provided with a side plate one and a side plate two, the top of each of the three side plate ones is fixedly connected with the mechanism box, the bottom of each of the three movable contacts is provided with an annular limiting groove, the inside of the top of the mechanism box is provided with a supporting mechanism, the transmission device is connected with three evenly distributed transmission frames, the top of each of the three transmission frames is rotatably connected with the bottom of each of the three insulating pull rods, and the side plate one and the side plate two are both provided with an auxiliary mechanism.

[0006] The supporting mechanism comprises a threaded rod and three evenly distributed limiting assemblies, the threaded rod is rotatably installed at the top of the mechanism box, an adjusting rod is threadedly sleeved with the outside of the threaded rod, a T-shaped sliding block one is fixedly installed at the top of the adjusting rod, and a T-shaped sliding groove one is formed in the top of the mechanism box.

[0007] The limiting assembly comprises two insulating limiting blocks, the two insulating limiting blocks are matched with the annular limiting groove, a rack one and a rack two are fixedly installed at the side away from each other of the two insulating limiting blocks respectively, a gear is arranged between the rack one and the rack two, the gear is rotatably installed in the inside of the mechanism box, the gear is meshed with the rack one and the rack two respectively, the top of the rack one is fixedly connected with the adjusting rod, and the top of the rack two is slidingly connected with the mechanism box.

[0008] Arc-shaped grooves are formed at the two ends of the top of the transmission frame.

[0009] The auxiliary mechanism comprises two L-shaped fixing frames and two push rods, the bottom of each of the two L-shaped fixing frames is fixedly connected with the transmission device, a limiting support is slidingly installed at one end of each of the two L-shaped fixing frames, a trapezoidal block is fixedly installed at the top of each of the two limiting supports, a spring is fixedly installed at the bottom of one end of each of the two trapezoidal blocks, one end of each of the two trapezoidal blocks away from the corresponding spring is matched with the bottom of one of the two push rods, the two push rods are fixedly connected with the rack one and the rack two respectively, and the bottom of each of the two limiting supports is matched with the corresponding arc-shaped groove.

[0010] Preferably, a threaded connecting head is fixedly installed at the top of each of the three insulating pull rods, and a threaded connecting hole is formed at the bottom of each of the three movable contacts, and each of the three threaded connecting holes is matched with one of the three threaded connecting heads.

[0011] Preferably, the top of the three racks is fixedly provided with a T-shaped sliding block two, and the top of the mechanism box is provided with a T-shaped sliding groove two, and the three T-shaped sliding blocks two are slidably arranged in the T-shaped sliding groove two.

[0012] Preferably, the inside of the side plate one and the side plate two is respectively provided with a strip-shaped sliding groove one and a strip-shaped sliding groove two from top to bottom, the two ends of the three transmission frames are provided with a positioning pin, the two ends of the plurality of positioning pins are slidably arranged in the corresponding strip-shaped sliding groove one and the strip-shaped sliding groove two, and the bottom of the three insulating pull rods is provided with a pin hole, and the three pin holes are matched with the corresponding positioning pins.

[0013] Preferably, the top of the three side plates two is provided with an anti-shielding mechanism, the anti-shielding mechanism comprises a special-shaped frame, a guide rod one and a guide rod two, the top of the special-shaped frame is fixedly connected with the inner wall of the mechanism box, a sliding shaft is slidably arranged in the special-shaped frame, the bottom of the sliding shaft is fixedly connected with the corresponding side plate two, the guide rod one is slidably arranged on the top of the side plate two, the end of the guide rod one away from the side plate two is slidably arranged on the outside of the guide rod two, and the guide rod two is fixedly connected with the mechanism box.

[0014] Compared with the prior art, the beneficial effects of the present application are:

[0015] Through the supporting mechanism, the three insulating pull rods can be limited before the damaged insulating pull rod is replaced, and the three insulating pull rods are prevented from moving up and down, so that the problem that the moving contact is damaged due to the upward movement of the moving contact at the top when the damaged insulating pull rod is replaced in the prior art is solved, and the influence on the stroke calibration accuracy in the subsequent arc-extinguishing chamber is avoided.

[0016] Through the auxiliary mechanism, the position of the transmission frame before replacement is fixed, and when the new insulating pull rod is installed, the connection between the insulating pull rod and the transmission frame can be quickly positioned by the positioning pin, so that it is not necessary to repeatedly calibrate and adjust the position of the insulating pull rod and the transmission frame at the bottom, which is beneficial to save the time for replacing the insulating pull rod. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0018] Figure 2 It is a schematic diagram of the local structure of the present application;

[0019] Figure 3 It is a schematic diagram of the internal structure of the mechanism box of the present application;

[0020] Figure 4 It is an enlarged view of structure A in the present application; Figure 3 ​

[0021] Figure 5 Figure 1 is a schematic diagram of the top structure of the transmission device of the present application;

[0022] Figure 6 Figure 2 is a schematic diagram of the combined one-side structure of side plate one and side plate two of the present application;

[0023] Figure 7 Figure 3 is a schematic diagram of the combined other-side structure of side plate one and side plate two of the present application;

[0024] Figure 8 Figure 4 is a schematic diagram of the anti-blocking mechanism structure of the present application;

[0025] Figure 9 Figure 5 is a schematic diagram of the separation of the moving contact, the insulating pull rod and the transmission frame of the present application.

[0026] In the drawings, the components represented by each reference numeral are listed as follows: 1, mechanism box; 2, arc extinguishing chamber; 3, fixed contact; 4, moving contact; 5, transmission device; 6, insulating pull rod; 7, threaded connection head; 8, threaded connection hole; 9, side plate one; 10, annular limiting groove; 11, threaded rod; 12, adjusting rod; 13, T-shaped sliding block one; 14, T-shaped sliding groove one; 15, insulating limiting block; 16, rack one; 17, rack two; 18, gear; 19, T-shaped sliding block two; 20, T-shaped sliding groove two; 21, transmission frame; 22, strip-shaped sliding groove one; 23, strip-shaped sliding groove two; 24, positioning pin; 25, pin hole; 26, side plate two; 27, arc-shaped groove; 28, L-shaped fixing frame; 29, limiting support; 30, trapezoidal block; 31, pushing rod; 32, special-shaped frame; 33, sliding shaft; 34, guide rod one; 35, guide rod two; 36, spring. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0028] The present application provides a technical solution: as Figures 1-9The outdoor high-voltage primary and secondary integrated complete set pole circuit breaker shown comprises a mechanism box 1, three arc extinguishing chambers 2 uniformly fixed on the top of the mechanism box 1, fixed contacts 3 fixed on the top of the three arc extinguishing chambers 2, movable contacts 4 slidingly installed at the bottom of the three arc extinguishing chambers 2, and a transmission device 5 installed inside the mechanism box 1, the bottom of each of the three movable contacts 4 is threadedly connected with an insulating pull rod 6, the two sides of each of the three insulating pull rods 6 are correspondingly provided with a side plate one 9 and a side plate two 26, the top of each of the three side plate ones 9 is fixedly connected with the mechanism box 1, the bottom of each of the three movable contacts 4 is provided with an annular limiting groove 10, the inside of the top end of the mechanism box 1 is provided with a supporting mechanism, the transmission device 5 is connected with three evenly distributed transmission frames 21, the top of each of the three transmission frames 21 is rotatably connected with the bottom of each of the three insulating pull rods 6, and an auxiliary mechanism is arranged between the side plate one 9 and the side plate two 26.

[0029] The supporting mechanism comprises a threaded rod 11 and three evenly distributed limiting assemblies, the threaded rod 11 is rotatably installed at the top end of the mechanism box 1, an adjusting rod 12 is threadedly sleeved outside the threaded rod 11, a T-shaped sliding block one 13 is fixedly installed at the top of the adjusting rod 12, and a T-shaped sliding groove one 14 is formed in the top of the mechanism box 1, and the T-shaped sliding block one 13 is slidingly installed in the inside of the T-shaped sliding groove one 14.

[0030] The limiting assembly comprises two insulating limiting blocks 15, the two insulating limiting blocks 15 are matched with the annular limiting groove 10, a rack one 16 and a rack two 17 are fixedly installed at the sides away from each other of the two insulating limiting blocks 15, a gear 18 is arranged between the rack one 16 and the rack two 17, the gear 18 is rotatably installed in the inside of the mechanism box 1, the gear 18 is meshed with the rack one 16 and the rack two 17 respectively, the top of the rack one 16 is fixedly connected with the adjusting rod 12, and the top of the rack two 17 is slidingly connected with the mechanism box 1.

[0031] Arc-shaped grooves 27 are formed at the two ends of the top of each of the transmission frames 21.

[0032] The auxiliary mechanism comprises two L-shaped fixing frames 28 and two push rods 31, the bottom of each of the two L-shaped fixing frames 28 is fixedly connected with the transmission device 5, a limiting support 29 is slidingly installed at one end of each of the two L-shaped fixing frames 28, a trapezoidal block 30 is fixedly installed at the top of each of the two limiting supports 29, a spring 36 is fixedly installed at the bottom of one end of each of the two trapezoidal blocks 30, the bottom of one end of each of the two trapezoidal blocks 30 away from the corresponding spring 36 is matched with the bottom of one of the two push rods 31, the two push rods 31 are fixedly connected with the rack one 16 and the rack two 17 respectively, and the bottom of each of the two limiting supports 29 is matched with the corresponding arc-shaped groove 27.

[0033] The top of the three insulating pull rods 6 is fixedly provided with a threaded connector 7, and the bottom of the three movable contacts 4 is provided with a threaded connecting hole 8, which is matched with the threaded connector 7.

[0034] The top of the three racks 17 is fixedly provided with a T-shaped sliding block 19, and the top end of the mechanism box 1 is provided with a T-shaped sliding groove 20, and the three T-shaped sliding blocks 19 are slidingly installed in the T-shaped sliding groove 20.

[0035] The inside of the side plate 9 and the side plate 26 is respectively provided with a strip-shaped sliding groove 22 and a strip-shaped sliding groove 23 from top to bottom, both ends of the three transmission frames 21 are provided with a positioning pin 24, both ends of the plurality of positioning pins 24 are slidingly installed in the corresponding strip-shaped sliding groove 22 and the strip-shaped sliding groove 23, and the bottom of the three insulating pull rods 6 is provided with a pin hole 25, which is matched with the corresponding positioning pin 24.

[0036] The top of the three side plates 26 is provided with an anti-blocking mechanism, which comprises a special-shaped frame 32, a guide rod 34 and a guide rod 35, the top of the special-shaped frame 32 is fixedly connected with the inner wall of the mechanism box 1, the inside of the special-shaped frame 32 is slidingly installed with a sliding shaft 33, the bottom of the sliding shaft 33 is fixedly connected with the corresponding side plate 26, the guide rod 34 is slidingly installed on the top of the side plate 26, the end of the guide rod 34 away from the side plate 26 is slidingly installed on the outside of the guide rod 35, and the guide rod 35 is fixedly connected with the mechanism box 1.

[0037] Working principle: before replacing the three insulating pull rods 6 in the mechanism box 1, the pole-mounted circuit breaker is in the open state, the main shaft of the transmission device 5 moves horizontally, under the action of the three transmission frames 21, the three insulating pull rods 6 and the three movable contacts 4 move downward, and the annular limiting groove 10 outside the three movable contacts 4 is matched with the corresponding insulating limiting block 15.

[0038] When the three insulating pull rods 6 are replaced, first rotate the threaded rod 11, and under the action of the T-shaped slider 13 and the T-shaped sliding groove 14, the adjusting rod 12 moves horizontally. The movement process of one of the limiting components is as follows: while the adjusting rod 12 moves, the rack 16 moves synchronously, the gear 18 rotates, and then the rack 17 moves. When the rack 17 moves, the T-shaped slider 19 at the top of the rack 17 slides in the T-shaped sliding groove 20, and the two insulating limiting blocks 15 move towards each other and into the annular limiting groove 10, thereby limiting the corresponding moving contact 4. The movement processes of the other two limiting components are the same as the above movement process, and the three insulating pull rods 6 are simultaneously limited to avoid moving up and down, thereby solving the problem that in the prior art, when the damaged insulating pull rod 6 is replaced, the moving contact 4 at the top is touched and moves up, causing the moving contact 4 to collide with other components and be damaged, and avoiding affecting the stroke calibration accuracy in the subsequent arc-extinguishing chamber 2.

[0039] During the movement of the plurality of racks 16 and 17, the corresponding auxiliary mechanisms move synchronously. The movement process of one of the auxiliary mechanisms is as follows: the two push rods 31 move synchronously inward, the bottoms of the two push rods 31 move away from the corresponding trapezoidal blocks 30, under the action of the two springs 36, the two limiting supports 29 move synchronously downward and into the corresponding arc-shaped grooves 27, thereby fixing the position of the corresponding transmission frame 21. When a new insulating pull rod 6 is installed, the positioning pin 24 can be quickly used to connect the insulating pull rod 6 and the transmission frame 21, thereby eliminating the need to repeatedly calibrate and adjust the position of the insulating pull rod 6 and the transmission frame 21 at the bottom, which is beneficial to save time for replacing the insulating pull rod 6.

[0040] When a certain insulating pull rod 6 is replaced, first remove the positioning pin 24 connecting the insulating pull rod 6 and the transmission frame 21 at the bottom, and then rotate the insulating pull rod 6 to separate it from the moving contact 4 at the top.

[0041] The bottoms of the three side plates 26 are fixedly connected between the transmission device 5 through bolts. When it is inconvenient for an operator to directly replace the three insulating pull rods 6, a certain side plate 26 can be removed by taking out the bolts at the bottom and pulling the side plate 26. The movement process of the corresponding anti-shielding mechanism is as follows: when the side plate 26 is pulled, the sliding shaft 33 at the top of the side plate 26 slides along the special-shaped frame 32. First, the side plate 26 moves without deviation, so that the ends of the two positioning pins 24 are separated from the corresponding strip-shaped sliding grooves 22 and 23. Then, the side plate 26 is inclined and slides for a distance and then moves horizontally. The side plate 26 does not shield the insulating pull rod 6 that needs to be replaced, thereby facilitating the operator to replace the damaged insulating pull rod 6. The movement processes of the other two anti-shielding mechanisms are the same as above.

[0042] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0043] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations to these embodiments can be made without departing from the principles and spirits of the application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An outdoor high-voltage primary and secondary fused integrated pole circuit breaker, comprising a mechanism box (1), three arc-extinguishing chambers (2) uniformly fixed on the top of the mechanism box (1), fixed contact (3) fixed on the top of the three arc-extinguishing chambers (2), movable contact (4) slidingly installed at the bottom of the three arc-extinguishing chambers (2), and transmission device (5) installed inside the mechanism box (1), characterized in that: The bottoms of the three moving contacts (4) are threadedly connected with insulating pull rods (6), the two sides of the three insulating pull rods (6) are correspondingly provided with side plates one (9) and side plates two (26), the tops of the three side plates one (9) are fixedly connected with the mechanism box (1), the bottoms of the three moving contacts (4) are provided with annular limiting grooves (10), the inside of the top of the mechanism box (1) is provided with a supporting mechanism, the transmission device (5) is connected with three evenly distributed transmission frames (21), the tops of the three transmission frames (21) are rotatably connected with the bottoms of the three insulating pull rods (6), and the side plates one (9) and the side plates two (26) are provided with auxiliary mechanisms. The supporting mechanism comprises a threaded rod (11) and three evenly distributed limiting assemblies, the threaded rod (11) is rotatably installed at the top of the mechanism box (1), the outside of the threaded rod (11) is threadedly sleeved with an adjusting rod (12), the top of the adjusting rod (12) is fixedly installed with a T-shaped sliding block one (13), the top of the mechanism box (1) is provided with a T-shaped sliding groove one (14), and the T-shaped sliding block one (13) is slidably installed in the inside of the T-shaped sliding groove one (14). The limiting assembly comprises two insulating limiting blocks (15), the two insulating limiting blocks (15) are matched with the annular limiting grooves (10), the sides, away from each other, of the two insulating limiting blocks (15) are fixedly installed with a rack one (16) and a rack two (17) respectively, a gear (18) is arranged between the rack one (16) and the rack two (17), the gear (18) is rotatably installed in the inside of the mechanism box (1), the gear (18) is meshed with the rack one (16) and the rack two (17) respectively, the top of the rack one (16) is fixedly connected with the adjusting rod (12), and the top of the rack two (17) is slidably connected with the mechanism box (1). The two ends of the top of the transmission frame (21) are provided with arc-shaped grooves (27). The auxiliary mechanism comprises two L-shaped fixing frames (28) and two push rods (31), the bottoms of the two L-shaped fixing frames (28) are fixedly connected with the transmission device (5), one end of each of the two L-shaped fixing frames (28) is slidably installed with a limiting support (29), the tops of the two limiting supports (29) are fixedly installed with trapezoidal blocks (30), the bottoms of one ends of the two trapezoidal blocks (30) are fixedly installed with springs (36), one ends of the two trapezoidal blocks (30), away from the corresponding springs (36), are matched with the bottoms of the two push rods (31) respectively, the two push rods (31) are fixedly connected with the rack one (16) and the rack two (17) respectively, and the bottoms of the two limiting supports (29) are matched with the corresponding arc-shaped grooves (27).

2. The outdoor high-voltage primary and secondary fused integrated pole circuit breaker according to claim 1, characterized in that: The tops of the three insulating pull rods (6) are fixedly installed with threaded connecting heads (7), the bottoms of the three moving contacts (4) are provided with threaded connecting holes (8), and the three threaded connecting holes (8) are matched with the three threaded connecting heads (7) respectively.

3. The outdoor high-voltage primary and secondary fused integrated pole circuit breaker according to claim 1, characterized in that: The top of the three rack twos (17) is fixedly installed with T-shaped sliding block twos (19), and the top end of the mechanism box (1) is provided with T-shaped sliding grooves twos (20), and the three T-shaped sliding block twos (19) are slidably installed in the T-shaped sliding grooves twos (20).

4. The outdoor high-voltage primary and secondary fused integrated pole circuit breaker according to claim 1, characterized in that: The inside of the side plate one (9) and the side plate two (26) is respectively provided with a strip-shaped sliding groove one (22) and a strip-shaped sliding groove two (23) from top to bottom, both ends of the three transmission frames (21) are sleeved with positioning pins (24), both ends of the plurality of positioning pins (24) are slidably installed in the corresponding strip-shaped sliding groove one (22) and strip-shaped sliding groove two (23) respectively, and the bottom of the three insulating pull rods (6) is provided with a pin hole (25), and the three pin holes (25) are matched with the corresponding positioning pins (24) respectively.

5. The outdoor high-voltage primary and secondary fused integrated pole circuit breaker according to claim 1, characterized in that: The top of the three side plate twos (26) is provided with an anti-blocking mechanism, the anti-blocking mechanism comprises a special-shaped frame (32), a guide rod one (34) and a guide rod two (35), the top of the special-shaped frame (32) is fixedly connected with the inner wall of the mechanism box (1), the inside of the special-shaped frame (32) is slidably installed with a sliding shaft (33), the bottom of the sliding shaft (33) is fixedly connected with the corresponding side plate two (26), the guide rod one (34) is slidably sleeved on the top of the side plate two (26), one end of the guide rod one (34) away from the side plate two (26) is slidably sleeved on the outside of the guide rod two (35), and the guide rod two (35) is fixedly connected with the mechanism box (1).

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