Anti-burnout primary and secondary fusion sleeve pole-mounted circuit breaker

Abstract

The invention relates to the technical field of circuit breakers, in particular to an anti-burnout primary and secondary fusion sleeve column circuit breaker, which comprises a circuit breaker main body, three isolating knife switches, three contact elastic sheets, a rotary driving mechanism and a mounting framework, and is characterized in that when a front knife board is clamped on the two contact elastic sheets, the front knife board is clamped on the two contact elastic sheets; the two contact elastic pieces can be pushed inwards through the outward pushing mechanism, so that the two contact elastic pieces clamp the front cutting board, and the problem that the elastic force of the contact elastic pieces is lost due to long-term use is solved. When the front cutting board and the rear cutting board are bent due to the rust block, the front cutting board rotates, the front cutting board and the rust block of the contact elastic piece form a rotary cutting mode, the rust block is broken point by point in the mode, and resistance borne by the isolation cutting board when the isolation cutting board is lifted is reduced. And in addition, pulling friction can be generated in the rotary cutting mode, the rust blocks are prevented from being taken up wholly, and more gaps between the isolation cutter plate and the rust blocks are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and particularly to a circuit breaker on a primary-secondary integrated sleeve column that prevents burning. Background Art

[0002] For a circuit breaker on a primary-secondary integrated sleeve column, its isolating blade and contact are prone to generating gaps and misalignments under the action of electrodynamic force, resulting in the generation of electric arcs between the isolating blade and the contact, and ultimately burning and eroding the isolating blade and the contact. However, the main reason for the generation of this gap is that the elastic force of the contact spring piece is lost after long-term use. And in the long-term outdoor environment, it is inevitable that the contact position between the contact spring piece and the isolating blade will rust and cause adhesion. When the knife switch rotates and lifts, it will encounter a large resistance, making the isolating blade unable to lift. After forcibly lifting, the rust block between the isolating blade and the contact spring piece will be taken out, and the rust block will be cleaned by the worker. When the isolating blade is inserted into the contact spring piece again, the gap between them will increase, resulting in the generation of electric arcs and burning. And the process of forcibly lifting requires the worker to climb onto the electric pole for operation, and the circuit breaker cannot cut off the power by itself. If the power cannot be cut off in time, the circuit breaker will still burn due to high load. Moreover, the process of the worker coming and climbing onto the electric pole takes a lot of time, and the power-off process is relatively dangerous.

[0003] Therefore, it is necessary to design a circuit breaker on a primary-secondary integrated sleeve column that prevents burning, which can avoid the loss of its own elastic force caused by the long-term use of the contact spring piece. At the same time, when the isolating blade and the contact spring piece are rust-bonded, it can reduce the resistance when the isolating blade is lifted, and reduce the lifting of the rust block, avoiding the generation of more gaps between the isolating blade and the rust block. Summary of the Invention

[0004] Aiming at the above-mentioned existing technical deficiencies, the purpose of the present invention is to provide a circuit breaker on a primary-secondary integrated sleeve column that prevents burning, which can avoid the loss of its own elastic force caused by the long-term use of the contact spring piece. At the same time, when the isolating blade and the contact spring piece are rust-bonded, it can reduce the resistance when the isolating blade is lifted, and reduce the lifting of the rust block, avoiding the generation of more gaps between the isolating blade and the rust block.

[0005] To achieve the above object, the present invention adopts the following technical solutions: The present invention provides a one - two - time fusion sleeve - column circuit breaker to prevent burning, which includes a circuit breaker main body, three isolating knives, three contact spring pieces, a rotary driving mechanism and a mounting frame. The mounting frame is fixedly connected to the circuit breaker main body. There are three conductive rods arranged on the circuit breaker main body. The three contact spring pieces are fixedly installed on the mounting frame. The three isolating knives are respectively used to connect the three conductive rods with the contact spring pieces. Each isolating knife includes a front knife plate, a rear knife plate and an elastic straightening mechanism. One end of the rear knife plate is hinged to the conductive rod, and the other end of the rear knife plate is hinged to the front knife plate. The elastic straightening mechanism is fixedly installed on the rear knife plate. An inclined slot one is opened on the front knife plate. There is a push column one that can be horizontally pushed on the elastic straightening mechanism. When the push column one abuts against the bottom of the inclined slot one, the top of the rear knife plate is parallel to the top of the front knife plate.

[0006] Preferably, outer - pushing mechanisms are symmetrically and fixedly arranged on both sides of the rear knife plate. The contact spring piece is divided into two half - spring pieces, and each half - spring piece corresponds to an outer - pushing mechanism. The outer - pushing mechanism is used to push the two contact spring pieces to move outward.

[0007] Preferably, each outer - pushing mechanism includes a bent plate, an elastic inner - pushing mechanism, a push column two, a guide plate and a slider. The contact spring piece is fixedly installed on the elastic seat of the elastic inner - pushing mechanism. One end of the bent plate is fixedly connected to the contact spring piece. The guide plate is fixedly installed on the rear knife plate. The front knife plate is rotatably connected to the guide plate. A strip - shaped accommodating groove is opened on the guide plate. The width of the slider is smaller than the width of the strip - shaped accommodating groove. The slider is located in the strip - shaped accommodating groove. Two inclined slots two are opened on the guide plate. Two sliding columns inserted into the inclined slots two are fixedly arranged on the slider. The push column two is fixedly installed on the slider. The end of the slider passes through the guide plate and contacts the bent plate. An avoidance hole for the end of the slider to pass through is opened on the guide plate. One side of the slider contacts the push column one.

[0008] Preferably, the elastic inner - pushing mechanism includes a guide seat one, a sliding seat, a guide column one, a spring one and a limiting circular plate. The sliding seat is slidably installed on the guide seat one. The half - spring piece is fixedly installed on the sliding seat. The guide column one is slidably connected to the guide seat one. A guide plate for guiding the guide column one is fixedly arranged on the guide seat one. The spring one is used to provide an elastic force for the contact spring piece towards the front knife plate. The limiting circular plate is fixedly installed at the end of the guide column one.

[0009] Preferably, the elastic straightening mechanism further includes symmetrically arranged elastic seats. Each elastic seat includes a displacement plate, a guide column two, a spring two, a guide seat three and a reinforcing frame. One end of the displacement plate is fixedly connected to the push column one. The guide column two is fixedly connected to the other end of the displacement plate. The guide seat three is fixedly installed on the side of the rear knife plate. The guide column two is slidably connected to the guide seat three. The spring two is used to apply an elastic force to the displacement plate away from the guide seat three. The reinforcing frame is connected to the side of the displacement plate and the tail of the guide column two. A guide hole for the push column two to pass through is opened on the outer edge of the displacement plate.

[0010] Preferably, the rotary drive mechanism includes an isolation rotating shaft, an isolation pull rod and a main crank arm. The isolation rotating shaft is rotatably connected to the mounting frame. One end of the main crank arm is fixedly mounted on the isolation rotating shaft. The other end of the main crank arm is hinged to the bottom of the isolation pull rod. The top of the isolation pull rod is hinged to the rear blade.

[0011] Preferably, a reset mechanism is fixedly provided on the mounting frame, and the reset mechanism is used to provide a rotational thrust to the isolation rotating shaft. The reset mechanism includes a secondary crutch arm and a telescopic rod. One end of the secondary crutch arm is fixedly installed on the isolation rotating shaft, and the other end of the secondary crutch arm is rotatably connected to the telescopic rod. One end of the telescopic rod is hinged to the mounting frame.

[0012] The beneficial effect of the present invention is that when the front blade plate of the anti-burning primary and secondary fusion sleeve column mounted circuit breaker is inserted into the two contact spring pieces, the two contact spring pieces can be pushed inward by the outward pushing mechanism, so that the two contact spring pieces clamp the front blade plate, thereby solving the problem of the contact spring pieces losing their own elastic force due to long-term use.

[0013] When the front blade and the rear blade are bent due to the rust block, the front blade rotates, and the front blade forms a rotational cutting mode with the rust block of the contact spring, which breaks the rust block point by point and reduces the resistance encountered when the isolation blade is lifted. In addition, this rotational cutting mode can generate pulling friction, avoid lifting the entire rust block, and avoid a large gap between the isolation blade and the rust block.

[0014] When the front blade and the rear blade are bent, the push mechanism pushes the contact spring piece outward adaptively, so that a pulling force is generated between the two contact spring pieces and the front blade, and the displacement distance of the contact spring piece is small, so as to prevent the rust block from being torn. In this way, during the sawing friction process, the front blade and the contact spring piece are also subjected to pulling force from two sides, so that the front blade and the contact spring piece are easier to separate.

[0015] The push-out mechanism does not use an electric control method, and the overall structure is small and delicate. It can adaptively push the contact spring outward at the moment when the front blade and the rear blade are bent. The distance of the push column 2 moving outward is limited by the slope of the inclined slot 2, and the distance can be set to be small to avoid excessive pulling of the contact spring to move outward. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 Schematic three-dimensional structure diagram of the present invention.

[0018] Figure 2 Front view before and after the state switch of this state.

[0019] Figure 3 Schematic partial three-dimensional structure diagram of the present invention.

[0020] Figure 4 Schematic partial three-dimensional structure connection diagram of the present invention.

[0021] Figure 5 Schematic diagram of the installation state of the elastic straightening mechanism and the front knife plate.

[0022] Figure 6 Schematic diagram of the disassembled state of the external pushing mechanism.

[0023] Figure 7 Schematic three-dimensional structure diagram of the elastic internal pushing mechanism.

[0024] Figure 8 Schematic three-dimensional structure diagram of the rotation driving mechanism.

[0025] Figure 9 Schematic three-dimensional structure diagram of the reset mechanism.

[0026] Explanation of reference numerals: 1. Circuit breaker main body; 1a. Conductive rod; 2. Front knife plate; 2a. First inclined groove; 3. Rear knife plate; 4. Contact spring piece; 5. Rotation driving mechanism; 5a. Isolation rotating shaft; 5b. Isolation pull rod; 5c. Main crank arm; 6. Elastic straightening mechanism; 6a. First push column; 6b. Displacement plate; 6c. Second guide post; 6d. Second spring; 6e. Third guide seat; 6f. Reinforcement frame; 7. Installation frame; 8. External pushing mechanism; 8a. Bent plate; 8b. Elastic internal pushing mechanism; 8b1. First guide seat; 8b2. Slide seat; 8b3. First guide post; 8b4. First spring; 8b5. Limit circular plate; 8c. Second push column; 8e. Guide plate; 8e1. Second inclined groove; 8f. Slide block; 8h. Slide post; 9. Reset mechanism; 9a. Sub-crank arm; 9b. Telescopic rod. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Embodiment: The present invention provides a circuit breaker on a primary-secondary integrated sleeve column that prevents burning, as Figures 1-5As shown in the figure, it includes a circuit breaker body 1, three isolating knife switches, three contact spring pieces 4, a rotary drive mechanism 5 and a mounting frame 7. The mounting frame 7 is fixedly connected to the circuit breaker body 1. There are three conductive rods 1a provided on the circuit breaker body 1. The three contact spring pieces 4 are fixedly installed on the mounting frame 7. The three isolating knife switches are respectively used to connect the three conductive rods 1a with the contact spring pieces 4. Each isolating knife switch includes a front knife plate 2, a rear knife plate 3 and an elastic straightening mechanism 6. One end of the rear knife plate 3 is hinged to the conductive rod 1a, and the other end of the rear knife plate 3 is hinged to the front knife plate 2. The elastic straightening mechanism 6 is fixedly installed on the rear knife plate 3. An inclined groove 2a is provided on the front knife plate 2. A push column 6a capable of horizontal pushing is provided on the elastic straightening mechanism 6. By horizontally pushing the push column 6a, when the push column 6a abuts against the bottom of the inclined groove 2a, the top of the rear knife plate 3 will be parallel to the top of the front knife plate 2. At this time, there is no bending between the front knife plate 2 and the rear knife plate 3. During the process of the front knife plate 2 rotating and engaging with the contact spring piece 4, due to the abutting effect of the push column 6a on the front knife plate 2, the front knife plate 2 cannot bend upward, that is, there is sufficient supporting force during the process of the front knife plate 2 engaging. When the front knife plate 2 needs to be separated from the contact spring piece 4, due to rust between the front knife plate 2 and the contact spring piece 4, when the front knife plate 2 is lifted upward, if the resistance is small, the elastic straightening mechanism 6 will not be compressed, and if the resistance is large, the elastic straightening mechanism 6 will be compressed, and the front knife plate 2 and the rear knife plate 3 will form a bend, as Figure 2 shown, it will change from the state in the above figure to the state in the following figure. During the transformation process, the front knife plate 2 is rotated, and the front knife plate 2 will form a rotational cutting method with the rust block of the contact spring piece 4. This method will break the rust block point by point, reducing the resistance received when the isolating knife plate is lifted. And this rotational cutting method can generate pulling friction, avoiding lifting the entire rust block and avoiding a large gap between the isolating knife plate and the rust block.

[0029] And during the process of the front knife plate 2 and the rear knife plate 3 continuing to rotate and lift, the front knife plate 2 will form a sawing action with the contact spring piece 4, reducing the resistance between the front knife plate 2 and the contact spring piece 4, and being able to perform sawing friction on the rusty area of the contact spring piece 4, further reducing the risk of lifting the entire rust block. Once the contact spring piece 4 is separated from the front knife plate 2, the elastic straightening mechanism 6 will push the front knife plate 2 to reset, preparing for the next time the front knife plate 2 rotates and engages with the contact spring piece 4.

[0030] Although the above method can solve the problem during rusting, it cannot solve the loss of its own elasticity caused by the long-term use of the contact spring piece. And even though using the front knife plate 2 reduces the risk of lifting the rust block of the contact spring piece 4, there is still a probability that the contact surface of the contact spring piece 4 will be ground thin during the sawing friction process. Therefore, as Figure 4As shown in the figure, external pushing mechanisms 8 are symmetrically and fixedly arranged on both sides of the rear knife plate 3. The contact spring piece 4 is divided into two half spring pieces, and each half spring piece corresponds to an external pushing mechanism 8. The external pushing mechanism 8 is used to push the two contact spring pieces 4 to move outward. When the front knife plate 2 and the rear knife plate 3 are bent, the two external pushing mechanisms 8 will simultaneously push the two contact spring pieces 4 to move outward. By pushing the two contact spring pieces 4 to move outward through the external pushing mechanism 8, a pulling force will be generated between the two contact spring pieces 4 and the front knife plate 2, and the displacement distance of the contact spring piece 4 is small, avoiding the rust block from being pulled apart. In this way, during the sawing friction process, the front knife plate 2 and the contact spring piece 4 are also subjected to pulling forces on both sides, making it easier to separate the front knife plate 2 and the contact spring piece 4. And when the front knife plate 2 is clamped on the two contact spring pieces 4, the two contact spring pieces 4 can be pushed inward by the external pushing mechanism 8, so that the two contact spring pieces 4 clamp the front knife plate 2, solving the problem of the loss of its own elasticity caused by the long-term use of the contact spring piece.

[0031] Since the external pushing mechanism 8 needs to adaptively push the contact spring piece 4 outward when the front knife plate 2 and the rear knife plate 3 are bent, and the displacement distance is small, it is difficult to use an electric control device for control operations. Therefore, as Figure 4 and Figure 6 shown, each external pushing mechanism 8 includes a bent plate 8a, an elastic internal pushing mechanism 8b, a second push column 8c, a guide plate 8e and a slider 8f. The contact spring piece 4 is fixedly installed on the elastic seat of the elastic internal pushing mechanism 8b. One end of the bent plate 8a is fixedly connected to the contact spring piece 4. The guide plate 8e is fixedly installed on the rear knife plate 3. The front knife plate 2 is rotatably connected to the guide plate 8e, that is, a rotational connection is formed between the rear knife plate 3 and the front knife plate 2. A strip-shaped accommodating groove is provided on the guide plate 8e. The width of the slider 8f is smaller than the width of the strip-shaped accommodating groove. The slider 8f is located in the strip-shaped accommodating groove. Two second inclined grooves 8e1 are provided on the guide plate 8e. Two sliding columns 8h inserted into the second inclined grooves 8e1 are fixedly arranged on the slider 8f. The second push column 8c is fixedly installed on the slider 8f. The end of the slider 8f passes through the guide plate 8e and contacts the bent plate 8a. An avoidance hole for the end of the slider 8f to pass through is provided on the guide plate 8e. One side of the slider 8f contacts the first push column 6a. When the front knife plate 2 is bent, the first push column 6a will slide, and the sliding direction of the first push column 6a is parallel to the length direction of the rear knife plate 3, so that the first push column 6a can slide along the strip-shaped accommodating groove. When the first push column 6a moves, it will push the slider 8f to slide outward along the second inclined groove 8e1, so that the second push column 8c will push the bent plate 8a, and the bent plate 8a will pull the contact spring piece 4 to move outward, so that the two contact spring pieces 4 can be separated from the front knife plate 2 at the same time, and the distance that the second push column 8c moves outward is limited by the slope of the inclination of the second inclined groove 8e1, and the distance can be set small to avoid over-pulling the contact spring piece 4 to move outward. And the contact spring piece 4 can be adaptively pushed outward at the moment when the front knife plate 2 and the rear knife plate 3 are bent.

[0032] As Figure 7 shown, the elastic inner pushing mechanism 8b includes a first guide seat 8b1, a sliding seat 8b2, a first guide post 8b3, a first spring 8b4 and a limiting circular plate 8b5. The sliding seat 8b2 is slidably mounted on the first guide seat 8b1. The half elastic piece is fixedly mounted on the sliding seat 8b2. The first guide post 8b3 is slidably connected to the first guide seat 8b1. A guide plate for guiding the first guide post 8b3 is fixedly provided on the first guide seat 8b1. The first spring 8b4 is used to provide an elastic force for the contact elastic piece 4 towards the front knife plate 2. The first spring 8b4 is sleeved on the first guide post 8b3. The first spring 8b4 is located between the sliding seat 8b2 and the guide plate. The limiting circular plate 8b5 is fixedly mounted at the end of the first guide post 8b3. When the contact elastic piece 4 is pulled outwards by the bending plate 8a, the sliding seat 8b2 will move outwards, that is, drive the separation between the half elastic piece of the contact elastic piece 4 and the front knife plate 2. When the front knife plate 2 is clamped into the contact elastic piece 4, through the elastic thrust of the first spring 8b4, it can be ensured that the fitting is maintained even if the contact elastic piece 4 is worn thin.

[0033] As Figure 4 shown, the elastic straightening mechanism 6 further includes symmetrically arranged elastic seats. Each elastic seat includes a displacement plate 6b, a second guide post 6c, a second spring 6d, a third guide seat 6e and a strengthening frame 6f. One end of the displacement plate 6b is fixedly connected to the first push post 6a. The second guide post 6c is fixedly connected to the other end of the displacement plate 6b. The third guide seat 6e is fixedly mounted on the side of the rear knife plate 3. The second guide post 6c is slidably connected to the third guide seat 6e. The second spring 6d is used to apply an elastic force to the displacement plate 6b away from the third guide seat 6e. The second spring 6d is sleeved on the second guide post 6c. One end of the second spring 6d abuts against the displacement plate 6b, and the other end abuts against the third guide seat 6e. The strengthening frame 6f is connected to the side of the displacement plate 6b and the tail of the second guide post 6c. When the front knife plate 2 and the rear knife plate 3 are bent and push the first push post 6a to move horizontally, the first push post 6a will drive the displacement plate 6b to move horizontally, which causes the second spring 6d to be compressed. When the front knife plate 2 is separated from the contact elastic piece 4, the second spring 6d will push the first push post 6a forward through the elastic force, that is, push the front knife plate 2 and the rear knife plate 3 to reset to a parallel state. The strengthening frame 6f strengthens the structural strength of the displacement plate 6b and the second guide post 6c. A guide hole for the second push post 8c to pass through is provided on the outer edge of the displacement plate 6b. By providing the guide hole, the second push post 8c can pass through the displacement plate 6b to contact the bending plate 8a.

[0034] As Figure 8As shown in the figure, the rotation drive mechanism 5 includes an isolation rotating shaft 5a, an isolation pull rod 5b, and a main crank arm 5c. The isolation rotating shaft 5a is rotatably connected to the mounting frame 7. One end of the main crank arm 5c is fixedly installed on the isolation rotating shaft 5a, and the other end of the main crank arm 5c is hinged to the bottom of the isolation pull rod 5b. The top of the isolation pull rod 5b is hinged to the rear knife plate 3. By rotating the isolation rotating shaft 5a, the isolation rotating shaft 5a can drive the isolation pull rod 5b to rotate through the main crank arm 5c, so that the rear knife plate 3 can rotate and swing.

[0035] As Figure 9 shown in the figure, a reset mechanism 9 is fixedly arranged on the mounting frame 7. The reset mechanism 9 is used to provide a rotational thrust to the isolation rotating shaft 5a. The reset mechanism 9 includes a secondary crank arm 9a and a telescopic rod 9b. One end of the secondary crank arm 9a is fixedly installed on the isolation rotating shaft 5a, the other end of the secondary crank arm 9a is rotatably connected to the telescopic rod 9b, and one end of the telescopic rod 9b is hinged to the mounting frame 7. When the front knife plate 2 and the rear knife plate 3 are in the closed state, the thrust provided by the telescopic rod 9b pushes the front knife plate 2 against the contact spring piece 4. During opening, the front knife plate 2 rotates upward. When it exceeds the maximum compression position of the telescopic rod 9b, the telescopic rod 9b will instead apply an upward thrust to the front knife plate 2 through the isolation rotating shaft 5a.

[0036] During use, when the front knife plate 2 rotates upward and separates from the contact spring piece 4, the rotation drive mechanism 5 will push the rear knife plate 3 to rotate upward. If the friction between the front knife plate 2 and the contact spring piece 4 is large, the spring two 6d will be compressed, causing the front knife plate 2 and the rear knife plate 3 to bend. During the bending process, the slider 8f will slide obliquely through the inclined groove two 8e1 of 8b, causing the push rod two 8c to push the bending plate 8a to both sides. This causes the two half spring pieces to separate to both sides, making it easier for the front knife plate 2 to lift and avoiding taking off too many rust blocks. After the front knife plate 2 is completely separated from the contact spring piece 4, the elastic straightening mechanism 6 will push the front knife plate 2 parallel to the rear knife plate 3.

[0037] When the front knife plate 2 is stuck on the two contact spring pieces 4, the outer push mechanism 8 can push the two contact spring pieces 4 inward, so that the two contact spring pieces 4 clamp the front knife plate 2, solving the problem of the loss of its own elasticity caused by the long-term use of the contact spring piece.

[0038] When the front knife plate 2 and the rear knife plate 3 are bent due to rust blocks, the front knife plate 2 rotates. The front knife plate 2 will form a rotational cutting method with the rust blocks of the contact spring piece 4. This method will break the rust blocks one by one, reducing the resistance when the isolation knife plate is lifted. And this rotational cutting method can generate a pulling friction, avoiding lifting the rust blocks as a whole and avoiding generating too many gaps between the isolation knife plate and the rust blocks.

[0039] Moreover, when the front cutting plate 2 and the rear cutting plate 3 are bent, the outward pushing mechanism 8 adaptively pushes the contact spring piece 4 outwards, so that a tensile force is generated between the two contact spring pieces 4 and the front cutting plate 2, and the displacement distance of the contact spring piece 4 is small, avoiding the rust block from being pulled apart. In this way, during the sawing friction process, a tensile force is also applied to the front cutting plate 2 and the contact spring piece 4 from two sides, making it easier to separate the front cutting plate 2 and the contact spring piece 4.

[0040] Moreover, the outward pushing mechanism 8 does not adopt an electric control method, and the overall structure is small and delicate, and can adaptively push the contact spring piece 4 outwards instantly when the front cutting plate 2 and the rear cutting plate 3 are bent. And the distance that the second push post 8c moves outwards is limited by the slope of the inclination of the second inclined groove 8e1, and the distance can be set to be small to avoid excessively pulling the contact spring piece 4 to move outwards.

[0041] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and its equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A circuit breaker on a primary and secondary integrated sleeve column that prevents burnout, characterized in that It includes a circuit breaker body (1), three isolating knife switches, three contact spring pieces (4), a rotary drive mechanism (5) and a mounting frame (7). The mounting frame (7) is fixedly connected to the circuit breaker body (1). There are three conductive rods (1a) provided on the circuit breaker body (1). The three contact spring pieces (4) are fixedly installed on the mounting frame (7). The three isolating knife switches are respectively used to connect the three conductive rods (1a) with the contact spring pieces (4). Each isolating knife switch includes a front knife plate (2), a rear knife plate (3) and an elastic straightening mechanism (6). One end of the rear knife plate (3) is hinged to the conductive rod (1a), and the other end of the rear knife plate (3) is hinged to the front knife plate (2). The elastic straightening mechanism (6) is fixedly installed on the rear knife plate (3). An inclined groove one (2a) is formed on the front knife plate (2). A push column one (6a) capable of horizontal pushing is provided on the elastic straightening mechanism (6). When the push column one (6a) abuts against the bottom of the inclined groove one (2a), the top of the rear knife plate (3) is parallel to the top of the front knife plate (2).

2. The one-time and secondary integrated sleeve column-mounted circuit breaker for preventing burnout according to claim 1, characterized in that Outer pushing mechanisms (8) are symmetrically and fixedly arranged on both sides of the rear knife plate (3). The contact spring piece (4) is divided into two half spring pieces, and each half spring piece corresponds to an outer pushing mechanism (8). The outer pushing mechanism (8) is used to push the two contact spring pieces (4) to move outward.

3. The one-time and secondary integrated sleeve column-mounted circuit breaker for preventing burnout according to claim 2, wherein Each outer pushing mechanism (8) includes a bent plate (8a), an elastic inner pushing mechanism (8b), a push column two (8c), a guide plate (8e) and a slider (8f). The contact spring piece (4) is fixedly installed on the elastic seat of the elastic inner pushing mechanism (8b). One end of the bent plate (8a) is fixedly connected to the contact spring piece (4). The guide plate (8e) is fixedly installed on the rear knife plate (3). The front knife plate (2) is rotatably connected to the guide plate (8e). A strip-shaped accommodating groove is formed on the guide plate (8e). The width of the slider (8f) is smaller than the width of the strip-shaped accommodating groove. The slider (8f) is located in the strip-shaped accommodating groove. Two inclined grooves two (8e1) are formed on the guide plate (8e). Two sliding columns (8h) inserted into the inclined grooves two (8e1) are fixedly arranged on the slider (8f). The push column two (8c) is fixedly installed on the slider (8f). The end of the slider (8f) passes through the guide plate (8e) and contacts the bent plate (8a). An avoidance hole for the end of the slider (8f) to pass through is formed on the guide plate (8e). One side of the slider (8f) contacts the push column one (6a).

4. The one-time and secondary integrated sleeve column-mounted circuit breaker for preventing burnout according to claim 3, wherein The elastic inner pushing mechanism (8b) includes a guide seat one (8b1), a sliding seat (8b2), a guide column one (8b3), a spring one (8b4) and a limiting circular plate (8b5). The sliding seat (8b2) is slidably installed on the guide seat one (8b1). The half spring piece is fixedly installed on the sliding seat (8b2). The guide column one (8b3) is slidably connected to the guide seat one (8b1). A guide plate for guiding the guide column one (8b3) is fixedly arranged on the guide seat one (8b1). The spring one (8b4) is used to provide an elastic force for the contact spring piece (4) towards the front knife plate (2). The limiting circular plate (8b5) is fixedly installed at the end of the guide column one (8b3).

5. The one-time and secondary integrated sleeve column circuit breaker for preventing burnout according to claim 3, characterized in that, The elastic straightening mechanism (6) further includes symmetrically arranged elastic seats. Each elastic seat includes a displacement plate (6b), a second guide post (6c), a second spring (6d), a third guide seat (6e), and a reinforcing frame (6f). One end of the displacement plate (6b) is fixedly connected to the first push post (6a). The second guide post (6c) is fixedly connected to the other end of the displacement plate (6b). The third guide seat (6e) is fixedly installed on the side of the rear knife plate (3). The second guide post (6c) is slidably connected to the third guide seat (6e). The second spring (6d) is used to apply an elastic force to the displacement plate (6b) away from the third guide seat (6e). The reinforcing frame (6f) is connected to the side of the displacement plate (6b) and the tail of the second guide post (6c). A guide hole for the second push post (8c) to pass through is formed in the outer edge of the displacement plate (6b).

6. The one-time and secondary integrated sleeve column circuit breaker for preventing burnout according to claim 1, wherein The rotary drive mechanism (5) includes an isolation rotating shaft (5a), an isolation pull rod (5b), and a main crank arm (5c). The isolation rotating shaft (5a) is rotatably connected to the mounting frame (7). One end of the main crank arm (5c) is fixedly installed on the isolation rotating shaft (5a). The other end of the main crank arm (5c) is hinged to the bottom of the isolation pull rod (5b). The top of the isolation pull rod (5b) is hinged to the rear knife plate (3).

7. The one-time and secondary integrated sleeve column-mounted circuit breaker for preventing burnout according to claim 6, wherein A reset mechanism (9) is fixedly arranged on the mounting frame (7). The reset mechanism (9) is used to provide a rotational thrust to the isolation rotating shaft (5a). The reset mechanism (9) includes a secondary crank arm (9a) and a telescopic rod (9b). One end of the secondary crank arm (9a) is fixedly installed on the isolation rotating shaft (5a). The other end of the secondary crank arm (9a) is rotatably connected to the telescopic rod (9b). One end of the telescopic rod (9b) is hinged to the mounting frame (7).

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