Rapid pole-mounted circuit breaker

Abstract

The rapid pole-mounted circuit breaker comprises a vacuum arc-extinguishing chamber, the bottom of the vacuum arc-extinguishing chamber is fixedly connected with an insulating shell, the lower end of a moving contact is connected with an insulating pull rod, a transverse moving rod sliding transversely is arranged in the insulating shell, the lower end of the insulating pull rod is hinged to a connecting rod, and the connecting rod is hinged to the transverse moving rod. A locking sleeve is fixedly connected in the insulating shell, an installation cavity is formed in the locking sleeve, a locking pin is connected in the installation cavity in a sliding mode, a locking groove is formed in the transverse moving rod, and the locking pin penetrates through an opening of the installation cavity to be inserted into the locking groove in the opening process. After the transverse moving rod moves, the locking pin is inserted into the locking groove to lock the transverse moving rod, and after the position of the transverse moving rod is locked, the insulating pull rod and the moving contact are mechanically locked, so that an opening state is kept, and the risk of electric shock caused by misoperation is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of circuit breakers, and in particular to a fast pole-mounted circuit breaker. Background Art

[0002] A pole-mounted circuit breaker is a key switch device installed on a power pole in a power transmission and distribution network. It is mainly used to automatically cut off the power supply in the event of a power failure or bad condition to protect equipment and personnel from electric shock. A pole-mounted circuit breaker is mainly composed of a mechanical switch and an electromagnetic trigger. When there is a fault current in the circuit, the electromagnetic trigger will be activated, and the mechanical switch will cut off the circuit to prevent the current from continuing to flow. The application of pole-mounted circuit breakers has greatly improved the power supply reliability of the power grid and provided a strong power guarantee for people's production and life.

[0003] When the pole-mounted circuit breaker is in use, the electromagnetic coil generates magnetic force to cause the pull rod to pull the moving contact in the arc extinguishing chamber to move, so that the circuit breaker can close or open, thereby linking or cutting off the circuit. When the electromagnetic coil drives the pull rod to move the moving contact in the arc extinguishing chamber away from the static contact, the circuit breaker opens. At this time, the circuit breaker needs to be kept open so that the circuit breaker can continue to disconnect the circuit, which is convenient for maintenance personnel to repair the faulty circuit. The existing method is to maintain the circuit breaker in the open state through the repulsive force generated by the electromagnetic coil. This method has the risk that when the electromagnetic coil fails, the electromagnetic coil cannot generate the force to maintain the circuit breaker in the open state. For this reason, it is necessary to improve the pole-mounted circuit breaker so that the circuit breaker can remain in the open state for a long time when it is opened. Summary of the invention

[0004] The purpose of the present invention is to solve the above technical problems and provide a fast pole-mounted circuit breaker.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A fast pole-mounted circuit breaker, comprising a vacuum interrupter, wherein a static contact and a moving contact are arranged in the vacuum interrupter, an insulating shell is fixedly connected to the bottom of the vacuum interrupter, an eddy current repulsion tripping coil and an eddy current repulsion closing coil are fixedly connected in the insulating shell, avoidance holes are provided in the eddy current repulsion tripping coil and the eddy current repulsion closing coil, an insulating pull rod is connected to the lower end of the moving contact, the insulating pull rod passes through the eddy current repulsion tripping coil and is fixedly connected to an eddy current metal disk, the eddy current metal disk is located between the eddy current repulsion tripping coil and the eddy current repulsion closing coil; a transverse sliding rod is arranged in the insulating shell, the lower end of the insulating pull rod is hingedly connected to a connecting rod, the end of the connecting rod away from the insulating pull rod is hinged on the transverse sliding rod, and the insulating pull rod moves up and down while driving the transverse sliding rod to move laterally through the connecting rod;

[0007] A locking sleeve is fixedly connected inside the insulating shell, and the locking sleeve is arranged on the transverse rod. A mounting cavity is provided on the locking sleeve, and a locking pin is slidably connected in the mounting cavity. The side of the mounting cavity close to the transverse rod is set as an open structure, and a locking groove is provided on the transverse rod. When the gate is opened, the locking pin passes through the opening of the mounting cavity and is inserted into the locking groove.

[0008] Furthermore, a compression spring is arranged in the installation cavity, and the compression spring abuts against an end of the locking pin away from the transverse rod to push the locking pin out in the direction of the transverse rod.

[0009] Furthermore, the lower end of the insulating pull rod is fixedly connected to a limit plate, and the limit plate extends between the installation cavity and the transverse rod to limit the locking pin in the installation cavity. During the downward movement of the insulating pull rod, the limit plate is driven to move so that the limit plate is disengaged from the locking pin so that the locking pin pops out and locks in the locking groove.

[0010] Furthermore, the insulating rod and the locking sleeve are arranged in a staggered manner, thereby avoiding interference between the insulating rod and the locking sleeve during movement.

[0011] Furthermore, a paddle is fixedly connected to the locking pin, an electric push rod is installed on the locking sleeve, a driving end of the electric push rod is located between the paddle and the transverse rod, and the driving end of the electric push rod pushes the paddle away from the transverse rod when it is extended.

[0012] Furthermore, a booster spring is arranged in the insulating shell, one end of the booster spring is fixed on the insulating shell, and the other end of the booster spring is fixed on the transverse rod, and during the transverse movement of the transverse rod, the booster spring shortens and pops out to the side close to the moving direction of the transverse rod.

[0013] Furthermore, an elastic compensation structure is provided on the insulating pull rod, and the elastic compensation structure includes a connecting rod fixed at one end of the moving contact, and a first spring is fixedly connected to the connecting rod, and the lower end of the first spring is fixed to the insulating pull rod; a connecting sleeve is provided at the upper end of the insulating pull rod, and the lower end of the connecting rod extends into the connecting sleeve and is fixedly connected to a limiting rod, and the inner wall of the connecting sleeve is provided with upper and lower sliding grooves, and the limiting rod extends into the sliding groove and moves up and down along the sliding groove.

[0014] Furthermore, the static contact is fixed in the vacuum interrupter, the moving contact is slidably matched with the vacuum interrupter, an upper terminal and a lower terminal are fixedly connected to the vacuum interrupter, the static contact is electrically connected to the upper terminal, and the moving contact is electrically connected to the lower terminal via a soft connecting conductor.

[0015] Furthermore, the vacuum interrupter is provided at multiple locations, and the lower ends of the insulating pull rods in the multiple vacuum interrupters are connected to the same transverse rod through a connecting rod.

[0016] Furthermore, the upper wiring terminal and the lower wiring terminal are located on the same side of the vacuum interrupter to facilitate wiring.

[0017] Furthermore, the connecting rod and the connecting sleeve are both made of insulating materials; and the booster spring is provided at multiple locations.

[0018] A fast pole-mounted circuit breaker provided by the present invention has the following beneficial effects: by adopting the above technical scheme, when opening the circuit, the eddy current repulsion opening coil is energized to generate repulsion, so that the eddy current metal disk moves downward and drives the moving contact to move downward, thereby driving the insulating pull rod to move downward, and the insulating pull rod moves downward and drives the transverse rod to move left and right. After the transverse rod moves, the locking pin is opposite to the locking groove and the locking pin is inserted in the locking groove to lock the transverse rod. After the position of the transverse rod is locked, the insulating pull rod and the moving contact are mechanically locked, thereby maintaining the opening state, and the opening state can be maintained even when there is no power failure in the opening system, so as to avoid the risk of electric shock caused by misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings:

[0020] Figure 1 A schematic structural diagram of a fast pole-mounted circuit breaker provided by the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the local structure of part A in the middle;

[0022] Figure 3 A schematic diagram of a local structure of a locking sleeve in a fast pole-mounted circuit breaker provided by the present invention;

[0023] Figure 4 A schematic diagram of the cross-sectional structure of a locking sleeve in a fast pole-mounted circuit breaker provided by the present invention;

[0024] Figure 5 A schematic diagram of the cross-sectional structure of a locking sleeve of a fast pole-mounted circuit breaker in an open state provided by the present invention;

[0025] Figure 6 A structural schematic diagram of the open state of a fast pole-mounted circuit breaker provided by the present invention.

[0026] Explanation of the numbers in the figure: 1. Vacuum interrupter; 11. Static contact; 12. Moving contact; 13. Upper terminal; 14. Lower terminal; 2. Insulating shell; 21. Booster spring; 3. Eddy current repulsion opening coil; 4. Eddy current repulsion closing coil; 5. Insulating pull rod; 51. Connecting rod; 52. Limit plate; 6. Eddy current metal disk; 7. Transverse rod; 71. Locking groove; 8. Locking sleeve; 81. Mounting cavity; 82. Locking pin; 83. Compression spring; 84. Paddle; 85. Electric push rod; 9. Elastic compensation structure; 91. Connecting rod; 92. First spring; 93. Connecting sleeve; 94. Limit rod; 95. Slide groove. DETAILED DESCRIPTION

[0027] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up-down-left-right-front-back...) are only used to explain the relative position relationship - movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0030] like Figure 1-Figure 6 As shown, a fast pole-mounted circuit breaker comprises a vacuum interrupter 1, wherein a static contact 11 and a moving contact 12 are arranged in the vacuum interrupter 1, an insulating shell 2 is fixedly connected to the bottom of the vacuum interrupter 1, an eddy current repulsion tripping coil 3 and an eddy current repulsion closing coil 4 are fixedly connected in the insulating shell 2, avoidance holes are provided in the eddy current repulsion tripping coil 3 and the eddy current repulsion closing coil 4, an insulating rod 5 is connected to the lower end of the moving contact 12, the insulating rod 5 passes through the eddy current repulsion tripping coil 3 and is fixedly connected to an eddy current metal disk 6, and the eddy current metal disk 6 is located between the eddy current repulsion tripping coil 3 and the eddy current repulsion closing coil 4; a transversely sliding traverse rod 7 is arranged in the insulating shell 2, the lower end of the insulating rod 5 is hingedly connected to a connecting rod 51, the end of the connecting rod 51 away from the insulating rod 5 is hinged on the traverse rod 7, and the insulating rod 5 moves up and down while driving the traverse rod 7 to move laterally through the connecting rod 51;

[0031] A locking sleeve 8 is fixedly connected inside the insulating shell 2, and the locking sleeve 8 is sleeved on the transverse rod 7. A mounting cavity 81 is provided on the locking sleeve 8, and a locking pin 82 is slidably connected in the mounting cavity 81. The side of the mounting cavity 81 close to the transverse rod 7 is set to an open structure, and a locking groove 71 is provided on the transverse rod 7. When the gate is opened, the locking pin 82 passes through the opening of the mounting cavity 81 and is inserted into the locking groove 71.

[0032] By adopting the above technical solution, when opening the circuit, the eddy current repulsion opening coil 3 is energized to generate a repulsive force, so that the eddy current metal disk 6 moves downward, driving the moving contact 12 to move downward, and then driving the insulating pull rod 5 to move downward. The insulating pull rod 5 moves downward and drives the transverse rod 7 to move left and right. After the transverse rod 7 moves, the locking pin 82 is opposite to the locking groove 71 and the locking pin 82 is inserted in the locking groove 71 to lock the transverse rod 7. After the position of the transverse rod 7 is locked, the insulating pull rod 5 and the moving contact 12 are mechanically locked, thereby maintaining the opening state, and the opening state can be maintained when there is no power failure in the opening system, so as to avoid the risk of electric shock caused by misoperation.

[0033] Specifically, a compression spring 83 is provided in the installation cavity 81, and the compression spring 83 abuts against the end of the locking pin 82 away from the transverse rod 7 to push the locking pin 82 toward the transverse rod 7. The compression spring 83 is provided to provide elastic force so that the locking pin 82 can be automatically locked into the transverse rod.

[0034] Specifically, the lower end of the insulating pull rod 5 is fixedly connected to a limiting plate 52, and the limiting plate 52 extends between the installation cavity 81 and the traverse rod 7 to limit the locking pin 82 in the installation cavity 81. When the insulating pull rod 5 moves downward, the limiting plate 52 is driven to move so that the limiting plate 52 and the locking pin 82 are disengaged so that the locking pin 82 pops out and is locked in the locking groove 71. The locking pin 82 is blocked by the limiting plate 52. When the insulating pull rod 5 moves downward to a set position, the limiting plate 52 releases the blocking of the locking pin 82, and the locking pin 82 can be locked in the insulating rod.

[0035] Specifically, the insulating rod 5 and the locking sleeve 8 are arranged in a staggered manner, so as to avoid interference between the insulating rod 5 and the locking sleeve during movement.

[0036] Specifically, a paddle 84 is fixedly connected to the locking pin 82, and an electric push rod 85 is installed on the locking sleeve 8. The driving end of the electric push rod 85 is located between the paddle 84 and the transverse rod 7. When the driving end of the electric push rod 85 is extended, the paddle 84 is pushed away from the transverse rod 7. The electric push rod 85 is started to drive the paddle 84 to move, so that the locking pin 82 moves into the installation cavity 81 to disengage from the locking groove 71, so that the locking pin 82 is retracted into the installation cavity 81 to reset, thereby releasing the lock of the multiple locking grooves 71, and then the closing operation is performed to control the eddy current repulsion closing coil 4 to be energized to drive the moving contact 12 upward to abut against the static contact 11 for electrical connection.

[0037] Specifically, a booster spring 21 is provided in the insulating housing 2, one end of the booster spring 21 is fixed to the insulating housing 2, and the other end of the booster spring 21 is fixed to the transverse rod 7, and during the transverse movement of the transverse rod 7, the booster spring 21 shortens and pops out toward the side close to the moving direction of the transverse rod 7. By providing the booster spring 21, during the process of the insulating pull rod 5 moving downward to drive the transverse rod 7 to move laterally, after the transverse rod 7 drives one end of the booster spring 21 to move past the critical point, a thrust is provided to make the transverse rod 7 continue to move, so that the transverse rod 7 can continue to move to a desired position.

[0038] Specifically, an elastic compensation structure 9 is provided on the insulating pull rod 5, and the elastic compensation structure 9 includes a connecting rod 91 fixed at one end of the moving contact 12, and a first spring 92 is fixedly connected to the connecting rod 91, and the lower end of the first spring 92 is fixed to the insulating pull rod 5; a connecting sleeve 93 is provided at the upper end of the insulating pull rod 5, and the lower end of the connecting rod 91 extends into the connecting sleeve 93 and is fixedly connected to a limiting rod 94, and an inner wall of the connecting sleeve 93 is provided with a slide groove 95 arranged up and down, and the limiting rod 94 extends into the slide groove 95 and moves up and down along the slide groove 95. By setting up the elastic compensation structure 9, when closing the circuit, the eddy current repulsion closing coil 4 drives the eddy current metal disk 6 to move upward to drive the moving contact 12 and the static contact 11, and at the same time drives the insulating pull rod 5 to move upward. During the process, the insulating pull rod 5 moves upward to the end of the stroke, and at the same time, the moving contact 12 and the static contact 11 are abutted to close the circuit, and the first spring 92 is compressed to compensate for the error between the two strokes. After the moving contact 12 is worn, it is supplemented by the first spring 92 so that the moving contact 12 can still abut against the static contact 11, thereby ensuring the reliability of closing the circuit.

[0039] Specifically, the static contact 11 is fixed in the vacuum interrupter 1, the moving contact 12 is slidably matched with the vacuum interrupter 1, an upper terminal 13 and a lower terminal 14 are fixedly connected to the vacuum interrupter 1, the static contact 11 is electrically connected to the upper terminal 13, and the moving contact 12 is electrically connected to the lower terminal 14 through a soft connecting conductor.

[0040] Specifically, the vacuum interrupter 1 is provided at multiple locations, and the lower ends of the insulating pull rods 5 in the multiple vacuum interrupters 1 are connected to the same transverse rod 7 through the connecting rod 51. Thus, the multi-phase circuit can perform closing and opening actions synchronously, thereby improving efficiency.

[0041] Specifically, the upper terminal 13 and the lower terminal 14 are located on the same side of the vacuum interrupter 1 to facilitate wiring. The connecting rod 91 and the connecting sleeve 93 are both made of insulating materials; the booster springs 21 are arranged in parallel at multiple locations.

[0042] The parts not involved in this technical solution can be implemented by using existing technologies.

[0043] The above shows and describes the basic principles, main features and characteristics of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of the present invention to be protected includes the attached claims and their equivalents.

Claims

1. A fast pole mounted circuit breaker, comprising a vacuum interrupter (1), wherein a stationary contact (11) and a moving contact (12) are arranged in the vacuum interrupter (1), characterized in that: The bottom of the vacuum interrupter (1) is fixedly connected to an insulating shell (2), an eddy current repulsion opening coil (3) and an eddy current repulsion closing coil (4) are fixedly connected inside the insulating shell (2), avoidance holes are provided in the eddy current repulsion opening coil (3) and the eddy current repulsion closing coil (4), the lower end of the moving contact (12) is connected to an insulating pull rod (5), the insulating pull rod (5) passes through the eddy current repulsion opening coil (3) and is fixedly connected to an eddy current metal disk (6 ), the eddy current metal disk (6) is located between the eddy current repulsion opening coil (3) and the eddy current repulsion closing coil (4); a transverse sliding rod (7) is arranged in the insulating housing (2); the lower end of the insulating pull rod (5) is hingedly connected to a connecting rod (51); the end of the connecting rod (51) away from the insulating pull rod (5) is hinged on the transverse rod (7); when the insulating pull rod (5) moves up and down, the connecting rod (51) drives the transverse rod (7) to move laterally; A locking sleeve (8) is fixedly connected inside the insulating housing (2), the locking sleeve (8) is sleeved on the transverse rod (7), a mounting cavity (81) is provided on the locking sleeve (8), a locking pin (82) is slidably connected in the mounting cavity (81), a side of the mounting cavity (81) close to the transverse rod (7) is arranged as an open structure, a locking groove (71) is provided on the transverse rod (7), and when the gate is opened, the locking pin (82) passes through the opening of the mounting cavity (81) and is inserted into the locking groove (71).

2. A fast pole mounted circuit breaker according to claim 1, characterized in that: A compression spring (83) is arranged in the installation cavity (81), and the compression spring (83) abuts against an end of the locking pin (82) away from the transverse rod (7) to push the locking pin (82) out in the direction of the transverse rod (7).

3. A fast pole mounted circuit breaker according to claim 2, characterized in that: The lower end of the insulating pull rod (5) is fixedly connected to a limit plate (52), and the limit plate (52) extends between the installation cavity (81) and the transverse rod (7) to limit the locking pin (82) in the installation cavity (81). When the insulating pull rod (5) moves downward, the limit plate (52) is driven to move so that the limit plate (52) and the locking pin (82) are disengaged so that the locking pin (82) pops out and is locked in the locking groove (71).

4. A fast pole mounted circuit breaker according to claim 3, characterized in that: The insulating pull rod (5) and the locking sleeve (8) are arranged in a staggered manner.

5. A fast pole mounted circuit breaker according to claim 3, characterized in that: The locking pin (82) is fixedly connected with a paddle (84), the locking sleeve (8) is mounted with an electric push rod (85), the driving end of the electric push rod (85) is located between the paddle (84) and the transverse rod (7), and when the driving end of the electric push rod (85) is extended, the paddle (84) is pushed away from the transverse rod (7).

6. A fast pole mounted circuit breaker according to claim 2, characterized in that: A booster spring (21) is arranged in the insulating housing (2), one end of the booster spring (21) is fixed on the insulating housing (2), and the other end of the booster spring (21) is fixed on the transverse rod (7), and during the transverse movement of the transverse rod (7), the booster spring (21) shortens and pops out toward the side close to the moving direction of the transverse rod (7).

7. A fast pole mounted circuit breaker according to claim 2, characterized in that: The insulating pull rod (5) is provided with an elastic compensation structure (9), and the elastic compensation structure (9) includes a connecting rod (91) fixed to one end of the moving contact (12), and a first spring (92) is fixedly connected to the connecting rod (91), and the lower end of the first spring (92) is fixed to the insulating pull rod (5); the upper end of the insulating pull rod (5) is provided with a connecting sleeve (93), and the lower end of the connecting rod (91) extends into the connecting sleeve (93) and is fixedly connected to a limiting rod (94), and the inner wall of the connecting sleeve (93) is provided with a sliding groove (95) arranged up and down, and the limiting rod (94) extends into the sliding groove (95) and moves up and down along the sliding groove (95).

8. A fast pole mounted circuit breaker according to claim 2, characterized in that: The stationary contact (11) is fixed in the vacuum interrupter (1), the moving contact (12) is slidably matched with the vacuum interrupter (1), an upper wiring terminal (13) and a lower wiring terminal (14) are fixedly connected to the vacuum interrupter (1), the stationary contact (11) is electrically connected to the upper wiring terminal (13), and the moving contact (12) is electrically connected to the lower wiring terminal (14) via a soft connecting conductor.

9. A fast pole mounted circuit breaker according to claim 2, characterized in that: The vacuum interrupter (1) is provided at multiple locations, and the lower ends of the insulating pull rods (5) in the multiple vacuum interrupter chambers (1) are connected to the same transverse rod (7) via a connecting rod (51).

10. A fast pole mounted circuit breaker according to claim 2, characterized in that: The upper wiring terminal (13) and the lower wiring terminal (14) are located on the same side of the vacuum interrupter (1); the connecting rod (91) and the connecting sleeve (93) are both made of insulating materials; and the booster spring (21) is provided at multiple locations.

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