Novel middle-mounted circuit breaker

Abstract

The invention discloses a novel middle-mounted circuit breaker which comprises an insulating sleeve, an insulating shell is fixedly connected to the bottom of the insulating sleeve, an opening repulsion coil and a closing repulsion coil are fixedly connected in the insulating shell, and an insulating pull rod is fixedly connected with a repulsion disc. The periphery of the repulsive force disc is in sealing fit with the inner wall of the insulating shell and slides up and down along the inner wall of the insulating shell, the repulsive force disc divides an inner cavity of the insulating shell into an upper cavity and a lower cavity, a cooling plate is arranged on the outer side of the insulating shell, a cooling pipeline is arranged in the cooling plate, the upper cavity is connected with one end of the cooling pipeline, and the lower cavity is connected with the other end of the cooling pipeline. And the insulating shell and the cooling pipeline are filled with cooling liquid. According to the invention, the repulsive force disc moves downwards, and the cooling liquid cooled in the cooling plate is sucked into the upper cavity, so that the temperature in the upper cavity is reduced; the repulsive force disc moves upwards, cooling liquid in the cooling plate enters the lower cavity, and the situation that the service life of equipment is shortened due to the too high coil temperature is avoided.

Description

Technical Field

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

[0002] A circuit breaker is a key power control device designed to automatically or manually connect, carry and disconnect currents under normal circuit conditions in a power system, and to reliably disconnect circuits after a certain delay under specified abnormal circuit conditions (such as short circuit, overload or undervoltage) to protect the safety of circuits and equipment, prevent faults from expanding, and ensure the stable operation of the power system.

[0003] The center-mounted circuit breaker is a high-performance electrical device, usually installed in an air-insulated metal-enclosed withdrawable switch cabinet. The main function of the center-mounted circuit breaker is to connect, carry and disconnect the current under normal circuit conditions, and to reliably disconnect the circuit after a certain delay under specified abnormal circuit conditions (such as short circuit, overload or undervoltage). In this way, it can quickly cut off the circuit when a fault occurs in the power system to protect the safety of the circuit and equipment, prevent the fault from expanding, and ensure the stable operation of the power system.

[0004] One of the existing driving methods of center-mounted circuit breakers is to use a repulsion coil to drive. The repulsion coil generates electromagnetic repulsion based on electromagnetic induction and eddy current effects. When the capacitor in the external circuit discharges to the driving coil, the coil generates a pulse and forms an alternating magnetic field nearby. This alternating magnetic field will generate induced eddy currents in the metal disk. The coil current interacts with the magnetic field generated by the eddy current to form an electromagnetic repulsion force, thereby driving the mechanical parts to move, thereby realizing the closing and opening movements of the circuit breaker. When the repulsion coil in the existing center-mounted circuit breaker is in use, the current flowing through the coil will generate heat, causing the temperature of the equipment to rise. If the temperature of the environment around the coil cannot be reduced in time, the life of the coil will be affected. Summary of the invention

[0005] The purpose of the present invention is to solve the above technical problems and provide a new type of center-mounted circuit breaker.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A novel center-mounted circuit breaker comprises an insulating sleeve, an insulating shell, a fixed contact, a movable contact, an insulating pull rod, a closing repulsion coil, an opening repulsion coil, and a repulsion disk, wherein the fixed contact is fixed in the insulating sleeve, the movable contact is arranged in the insulating sleeve and slides up and down along the insulating sleeve, and the insulating pull rod is connected to the lower end of the movable contact; the bottom of the insulating sleeve is fixedly connected with an insulating shell, the opening repulsion coil and the closing repulsion coil are fixedly connected in the insulating shell, the insulating pull rod extends into the insulating shell and is fixedly connected with the repulsion disk, and the repulsion disk is located between the opening repulsion coil and the closing repulsion coil;

[0008] The repulsion disk is sealed with the inner wall of the insulating shell and slides up and down along the inner wall of the insulating shell. The repulsion disk divides the inner cavity of the insulating shell into an upper cavity and a lower cavity. A cooling plate is provided on the outside of the insulating shell, and a cooling pipe is provided in the cooling plate. The upper cavity is connected to one end of the cooling pipe, and the lower cavity is connected to the other end of the cooling pipe. The insulating shell and the cooling pipe are filled with coolant.

[0009] Furthermore, the cooling pipe is wound in the cooling plate.

[0010] Furthermore, the surface of the cooling plate is provided with heat dissipation fins.

[0011] Furthermore, a disturbance device is provided in the insulating shell, and the disturbance device includes a rack fixed on the repulsion disk and a rotating shaft rotatably connected to the inner wall of the insulating shell, the rack is arranged parallel to the insulating pull rod, and a first gear is fixedly connected to the rotating shaft, and the rack is meshed with the first gear to form a gear and rack transmission, a rotating cylinder is sleeved on the outer wall of the insulating pull rod, and a first bevel gear is fixedly connected to the outer wall of the rotating cylinder, and a second bevel gear is fixedly connected to the rotating shaft, and the first bevel gear is meshed with the second bevel gear to form a bevel gear transmission, and a disturbance rod is fixedly connected to the outer wall of the rotating cylinder.

[0012] Furthermore, a fixing seat is fixedly connected to the inner cavity side wall of the insulating shell, and the rotating shaft is rotatably connected to the fixing seat; the end of the rotating cylinder is rotatably connected to the inner wall of the insulating shell.

[0013] Furthermore, the disturbance device is provided at two locations, and the two disturbance devices are respectively located in the upper cavity and the lower cavity.

[0014] Furthermore, the repulsion disk, the opening repulsion coil and the closing repulsion coil are arranged parallel to each other.

[0015] Furthermore, an upper wiring terminal and a lower wiring terminal are fixedly connected to the insulating sleeve, the upper wiring terminal is electrically connected to the fixed contact, and the lower wiring terminal is electrically connected to the movable contact through a soft wire.

[0016] Furthermore, the lower end of the insulating shell is fixedly connected to a mounting shell, and a first holding magnet and a second holding magnet are fixedly connected inside the mounting shell. A suction disk is arranged between the first holding magnet and the second holding magnet, and the lower end of the insulating pull rod passes through the insulating shell and is fixedly connected to the suction disk. When the repulsion disk is in contact with the opening repulsion coil, the suction disk is adsorbed on the first holding magnet, and when the repulsion disk is in contact with the closing repulsion coil, the suction disk is adsorbed on the second holding magnet.

[0017] Furthermore, a buffer mechanism is provided at the upper end of the insulating pull rod, and the buffer mechanism includes a movable sleeve fixed at the upper end of the insulating pull rod, the lower end of the movable contact extends into the movable sleeve and slides up and down with the movable sleeve, a slide groove is provided on the inner side wall of the movable sleeve, a slider is fixedly connected to the movable contact and the slider is located in the slide groove, a compression spring is provided in the movable sleeve, and the compression spring abuts against the lower end of the movable contact.

[0018] A novel center-mounted circuit breaker provided by the present invention has the following beneficial effects: it is connected to a control circuit through an opening repulsion coil or a closing repulsion coil, thereby controlling the movement of a repulsion disk to drive the insulating pull rod to move downward or upward, thereby driving the movable contact to separate from or abut against the fixed contact to realize an opening or closing action; during the opening process, the repulsion disk moves downward, so that the cooling liquid in the lower cavity is pressed into the cooling plate, and the cooling liquid cooled in the cooling plate is sucked into the upper cavity, thereby reducing the temperature in the upper cavity, thereby cooling the opening repulsion coil; similarly, during the closing process, the repulsion disk moves upward, so that the cooling liquid in the cooling plate enters the lower cavity, thereby cooling the closing repulsion coil in the lower cavity, thereby avoiding excessive coil temperature and reducing the life of the equipment. 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 diagram of the structure of a novel center-mounted circuit breaker in a closed state 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 for Figure 1 Schematic diagram of the local structure of the middle B part;

[0023] Figure 4 The present invention provides a schematic structural diagram of a novel center-mounted circuit breaker in an open state.

[0024] Explanation of the numbers in the figure: 1. Insulating sleeve; 11. Fixed contact; 12. Movable contact; 13. Upper terminal; 14. Lower terminal; 2. Insulating shell; 21. Upper cavity; 22. Lower cavity; 3. Insulating pull rod; 4. Closing repulsion coil; 5. Opening repulsion coil; 6. Repulsion disk; 7. Cooling plate; 71. Cooling duct; 8. Disturbance device; 81. Rack; 82. Rotating shaft; 83. First gear; 84. Rotating cylinder; 85. First bevel gear; 86. Second bevel gear; 87. Disturbance rod; 88. Fixed seat; 9. Mounting shell; 91. First retaining magnet; 92. Second retaining magnet; 93. Suction disk; 10. Buffer mechanism; 101. Movable sleeve; 102. Slide groove; 103. Sliding block; 104. Compression spring. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] 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.

[0028] like Figure 1-Figure 4 As shown, a novel center-mounted circuit breaker comprises an insulating sleeve 1, an insulating shell 2, a fixed contact 11, a movable contact 12, an insulating pull rod 3, a closing repulsion coil 4, an opening repulsion coil 5, and a repulsion disk 6, wherein the fixed contact 11 is fixed in the insulating sleeve 1, the movable contact 12 is arranged in the insulating sleeve 1 and slides up and down along the insulating sleeve 1, and the insulating pull rod 3 is connected to the lower end of the movable contact 12; the bottom of the insulating sleeve 1 is fixedly connected with an insulating shell 2, the opening repulsion coil 5 and the closing repulsion coil 4 are fixedly connected in the insulating shell 2, the insulating pull rod 3 extends into the insulating shell 2 and is fixedly connected with the repulsion disk 6, and the repulsion disk 6 is located between the opening repulsion coil 5 and the closing repulsion coil 4;

[0029] The repulsion disk 6 is sealed with the inner wall of the insulating shell 2 and slides up and down along the inner wall of the insulating shell 2. The repulsion disk 6 divides the inner cavity of the insulating shell 2 into an upper cavity 21 and a lower cavity 22. A cooling plate 7 is provided on the outside of the insulating shell 2. A cooling pipe 71 is provided in the cooling plate 7. The upper cavity 21 is connected to one end of the cooling pipe 71, and the lower cavity 22 is connected to the other end of the cooling pipe 71. The insulating shell 2 and the cooling pipe 71 are filled with coolant.

[0030] By adopting the above technical scheme, the opening repulsion coil 5 or the closing repulsion coil 4 is connected to the control circuit, so as to control the movement of the repulsion disk 6 to drive the insulating pull rod 3 to move downward or upward, thereby driving the movable contact 12 to separate from or abut against the fixed contact 11 to realize the opening or closing action; during the opening process, the repulsion disk 6 moves downward, so that the cooling liquid in the lower cavity 22 is pressed into the cooling plate 7, and the cooling liquid cooled in the cooling plate 7 is sucked into the upper cavity 21, so that the temperature in the upper cavity 21 is reduced, thereby cooling the opening repulsion coil 5; similarly, during the closing process, the repulsion disk 6 moves upward, so that the cooling liquid in the cooling plate 7 enters the lower cavity 22, so that the closing repulsion coil 4 in the lower cavity 22 is cooled, so as to avoid excessive coil temperature and reduce the life of the equipment.

[0031] Specifically, the cooling pipe 71 is wound in the cooling plate 7, thereby increasing the length of the cooling pipe 71 and facilitating heat dissipation of the coolant in the cooling pipe 71. Specifically, the surface of the cooling plate 7 is provided with heat dissipation fins, thereby improving heat dissipation efficiency.

[0032] Specifically, a disturbance device 8 is provided in the insulating shell 2, and the disturbance device 8 includes a rack 81 fixed on the repulsion disk 6 and a rotating shaft 82 rotatably connected to the inner wall of the insulating shell 2, the rack 81 is arranged in parallel with the insulating pull rod 3, and a first gear 83 is fixedly connected to the rotating shaft 82, and the rack 81 is meshed with the first gear 83 to form a gear-rack 81 transmission, and a rotating cylinder 84 is sleeved on the outer wall of the insulating pull rod 3, and a first bevel gear 85 is fixedly connected to the outer wall of the rotating cylinder 84, and a second bevel gear 86 is fixedly connected to the rotating shaft 82, and the first bevel gear 85 is meshed with the second bevel gear 86 to form a bevel gear transmission, and a disturbance rod 87 is fixedly connected to the outer wall of the rotating cylinder 84. When the repulsion disk 6 moves up and down, it drives the rack 81 to move up and down, and the rack 81 drives the first gear 83 to rotate, so that the second bevel gear 86 on the rotating shaft 82 rotates, and then drives the first bevel gear 85 to rotate. The rotation of the first bevel gear 85 causes the rotating cylinder 84 to rotate, and then drives the disturbance rod 87 to rotate to disturb the coolant in the insulating shell 2, so that the internal liquid temperature is uniform and it is beneficial to the heat dissipation of the coil.

[0033] Specifically, a fixing seat 88 is fixedly connected to the inner cavity side wall of the insulating shell 2 , and the rotating shaft 82 is rotatably connected to the fixing seat 88 ; the end of the rotating cylinder 84 is rotatably connected to the inner wall of the insulating shell 2 .

[0034] Specifically, the disturbance device 8 is provided at two locations, and the two disturbance devices 8 are respectively located in the upper cavity 21 and the lower cavity 22. By providing two disturbance devices 8, the surrounding environment of the opening repulsion coil 5 or the closing repulsion coil 4 is disturbed and cooled respectively.

[0035] Specifically, the repulsion disk 6 is arranged parallel to the opening repulsion coil 5 and the closing repulsion coil 4 .

[0036] Specifically, the insulating sleeve 1 is fixedly connected with an upper terminal 13 and a lower terminal 14, the upper terminal 13 is electrically connected to the fixed contact 11, and the lower terminal 14 is electrically connected to the movable contact through a flexible wire. It can be understood that the fixed contact 11, the movable contact 12, the upper terminal 13, and the lower terminal 14 are all electrical conductors.

[0037] Specifically, the lower end of the insulating shell 2 is fixedly connected to a mounting shell 9, and a first holding magnet 91 and a second holding magnet 92 are fixedly connected inside the mounting shell 9. A suction disk 93 is provided between the first holding magnet 91 and the second holding magnet 92. The lower end of the insulating pull rod 3 passes through the insulating shell 2 and is fixedly connected to the suction disk 93. When the repulsion disk 6 is in contact with the opening repulsion coil 5, the suction disk 93 is adsorbed on the first holding magnet 91. When the repulsion disk 6 is in contact with the closing repulsion coil 4, the suction disk 93 is adsorbed on the second holding magnet 92. By providing the first holding magnet 91 and the second holding magnet 92, an additional force formed by the magnetic attraction is provided to keep the insulating pull rod 3 in the opening or closing state, thereby avoiding the risk of misoperation caused by the change of the opening and closing state after the repulsion coil is powered off.

[0038] Specifically, a buffer mechanism 10 is provided at the upper end of the insulating pull rod 3, and the buffer mechanism 10 includes a movable sleeve 101 fixed at the upper end of the insulating pull rod 3, the lower end of the movable contact 12 extends into the movable sleeve 101 and slides up and down with the movable sleeve 101, a slide groove 102 is provided on the inner side wall of the movable sleeve 101, a slider 103 is fixedly connected to the movable contact 12 and the slider 103 is located in the slide groove 102, and a compression spring 104 is provided in the movable sleeve 101, and the compression spring 104 abuts against the lower end of the movable contact 12. The elastic force provided by the compression spring 104 enables the movable contact 12 to remain abutted against the fixed contact 11 when the switch is closed. It should be noted that the buffer mechanism 10 is provided in the insulating sleeve 1.

[0039] The parts not involved in this technical solution can be implemented by using existing technologies.

[0040] 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 new type of center-mounted circuit breaker, characterized in that: The invention comprises an insulating sleeve (1), an insulating shell (2), a fixed contact (11), a movable contact (12), an insulating pull rod (3), a closing repulsion coil (4), an opening repulsion coil (5), and a repulsion disk (6), wherein the fixed contact (11) is fixed in the insulating sleeve (1), the movable contact (12) is arranged in the insulating sleeve (1) and slides up and down along the insulating sleeve (1), and the insulating pull rod (3) is connected to the lower end of the movable contact (12); the bottom of the insulating sleeve (1) is fixedly connected to the insulating shell (2), the opening repulsion coil (5) and the closing repulsion coil (4) are fixedly connected in the insulating shell (2), the insulating pull rod (3) extends into the insulating shell (2) and is fixedly connected to the repulsion disk (6), and the repulsion disk (6) is located between the opening repulsion coil (5) and the closing repulsion coil (4); The circumference of the repulsion disk (6) is sealed with the inner wall of the insulating shell (2) and slides up and down along the inner wall of the insulating shell (2); the repulsion disk (6) divides the inner cavity of the insulating shell (2) into an upper cavity (21) and a lower cavity (22); a cooling plate (7) is arranged on the outside of the insulating shell (2); a cooling pipe (71) is arranged in the cooling plate (7); the upper cavity (21) is connected to one end of the cooling pipe (71); the lower cavity (22) is connected to the other end of the cooling pipe (71); and the insulating shell (2) and the cooling pipe (71) are filled with cooling liquid.

2. A novel center-mounted circuit breaker according to claim 1, characterized in that: The cooling pipe (71) is wound in the cooling plate (7).

3. A novel center-mounted circuit breaker according to claim 1, characterized in that: The surface of the cooling plate (7) is provided with heat dissipation fins.

4. A novel center-mounted circuit breaker according to claim 1, characterized in that: A disturbance device (8) is arranged in the insulating shell (2), and the disturbance device (8) comprises a rack (81) fixed on the repulsion disk (6) and a rotating shaft (82) rotatably connected to the inner wall of the insulating shell (2), the rack (81) is arranged in parallel with the insulating pull rod (3), the rotating shaft (82) is fixedly connected to a first gear (83), the rack (81) and the first gear (83) are meshed to form a gear-rack (81) transmission, the outer wall of the insulating pull rod (3) is sleeved with a rotating cylinder (84), the outer wall of the rotating cylinder (84) is fixedly connected to a first bevel gear (85), the rotating shaft (82) is fixedly connected to a second bevel gear (86), the first bevel gear (85) and the second bevel gear (86) are meshed to form a bevel gear transmission, and a disturbance rod (87) is fixedly connected to the outer wall of the rotating cylinder (84).

5. A novel center-mounted circuit breaker according to claim 4, characterized in that: A fixing seat (88) is fixedly connected to the inner cavity side wall of the insulating shell (2), and the rotating shaft (82) is rotatably connected to the fixing seat (88); and the end of the rotating cylinder (84) is rotatably connected to the inner wall of the insulating shell (2).

6. A novel center-mounted circuit breaker according to claim 4, characterized in that: The disturbance device (8) is provided at two locations, and the two disturbance devices (8) are respectively located in the upper cavity (21) and the lower cavity (22).

7. A novel center-mounted circuit breaker according to claim 1, characterized in that: The repulsion disk (6) is arranged parallel to the opening repulsion coil (5) and the closing repulsion coil (4).

8. A novel center-mounted circuit breaker according to claim 1, characterized in that: An upper wiring terminal (13) and a lower wiring terminal (14) are fixedly connected to the insulating sleeve (1); the upper wiring terminal (13) is electrically connected to the fixed contact (11); and the lower wiring terminal (14) is electrically connected to the movable contact (12) via a soft wire.

9. A novel center-mounted circuit breaker according to claim 1, characterized in that: The lower end of the insulating shell (2) is fixedly connected to a mounting shell (9), and a first holding magnet (91) and a second holding magnet (92) are fixedly connected inside the mounting shell (9), and a suction disk (93) is provided between the first holding magnet (91) and the second holding magnet (92). The lower end of the insulating pull rod (3) passes through the insulating shell (2) and is fixedly connected to the suction disk (93). When the repulsion disk (6) is in contact with the opening repulsion coil (5), the suction disk (93) is adsorbed on the first holding magnet (91), and when the repulsion disk (6) is in contact with the closing repulsion coil (4), the suction disk (93) is adsorbed on the second holding magnet (92).

10. A novel center-mounted circuit breaker according to any one of claims 1 to 9, characterized in that: A buffer mechanism (10) is provided at the upper end of the insulating pull rod (3), and the buffer mechanism (10) includes a movable sleeve (101) fixed at the upper end of the insulating pull rod (3); the lower end of the movable contact (12) extends into the movable sleeve (101) and slides up and down with the movable sleeve (101); a slide groove (102) is provided on the inner side wall of the movable sleeve (101); a slider (103) is fixedly connected to the movable contact (12) and the slider (103) is located in the slide groove (102); a compression spring (104) is provided in the movable sleeve (101), and the compression spring (104) abuts against the lower end of the movable contact (12).

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