Traction DC circuit breaker fast disconnect device

Abstract

The present invention provides a traction DC circuit breaker quick-disconnecting device. When disconnection is required, the emergency tripping rod is manually pushed backward on the front side of a trolley. Since the bottom end of the movable column is inserted into the groove of the emergency tripping rod, the movable column is pushed upward, driving the connecting arm to further tilt backward and upward, thereby pulling the straight rod of the disconnecting mechanism to disconnect. Alternatively, the DC circuit breaker can be manually moved relative to the emergency tripping rod by using a tool. Similarly, since the bottom end of the movable column is inserted into the groove of the emergency tripping rod, the movable column is pushed upward, driving the connecting arm to further tilt backward and upward, thereby pulling the straight rod of the disconnecting mechanism to disconnect. Alternatively, the electromagnet is energized to generate magnetism, which draws the iron disconnecting rod forward, and the disconnecting rod pulls the straight rod downward, thereby disconnecting the disconnecting mechanism. In this way, three disconnecting modes are provided, which is very rich and greatly improves safety.

Description

Technical Field

[0001] The present invention relates to the field of traction DC circuit breakers, and in particular to a fast disconnecting device for a traction DC circuit breaker. Background Art

[0002] DC circuit breakers primarily include neutral busbar circuit breakers, neutral busbar grounding circuit breakers, metal circuit transfer circuit breakers, and earth circuit transfer circuit breakers. These breakers offer exceptional current-limiting performance, accurately protecting relay protection and automatic devices from overloads, short circuits, and other fault hazards. Through extensive and comprehensive scientific testing, these breakers, with their superior current-limiting and arc-extinguishing capabilities, can provide fully selective protection between main (sub) panels, protective panels, and relay panels in DC systems under 3000Ah. Patent CN202011365346.3 discloses a modular manual-automatic integrated isolation and disconnecting device, including an electrical control module body and a main disconnecting bracket module. The electrical control module body is installed on the main disconnecting bracket module. The main disconnecting bracket module includes a base. The front end of the lead screw is rotatably connected to the mounting plate A, and its end passes through the mounting plate A and is connected to the manually adjusted meshing gear. The tail end of the lead screw is rotatably connected to the mounting plate B, and its end passes through the mounting plate B and is transmission-connected to the power output shaft of the drive motor. The tail of the base has a plug-in tail seat, and the lead screw nut is fixedly connected to the bracket device. The disconnecting device of this patent is inconvenient and slow to operate. There is no single disconnecting device and the method is single. The current traction DC circuit breaker requires quick disconnection. The existing traction DC circuit breaker segmentation only has electric quick disconnection, and a variety of disconnecting methods are needed to better meet the needs of use. Therefore, it is very necessary to solve this problem. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a traction DC circuit breaker quick disconnecting device. When disconnection is required, the emergency tripping rod is manually pushed backward on the front side of the trolley. Since the bottom end of the movable column is inserted into the groove of the emergency tripping rod, the movable column is pushed upward, driving the connecting arm to further tilt backward and upward, thereby pulling the straight rod of the disconnecting mechanism to disconnect. The DC circuit breaker can also be moved relative to the emergency tripping rod by manually rotating the screw with a tool on the front side of the trolley. Similarly, since the bottom end of the movable column is inserted into the groove of the emergency tripping rod, the movable column is pushed upward, driving the connecting arm to further tilt backward and upward, thereby pulling the straight rod of the disconnecting mechanism to disconnect. The electromagnet can also be energized to generate magnetism, which will suck the iron disconnecting rod forward, and the disconnecting rod will pull the straight rod downward, thereby disconnecting the disconnecting mechanism. In this way, there are three disconnecting modes, which are very rich, greatly improve safety, and solve the problems encountered in the background technology.

[0004] The purpose of the present invention is to provide a traction DC circuit breaker fast disconnect device, comprising a trolley, a DC circuit breaker is provided on the trolley, a base plate is provided at the bottom of the DC circuit breaker, a screw is connected to the right side of the base plate, the screw is rotated by a tool to drive the base plate to move forward and backward on the trolley, and a disconnecting mechanism is provided inside the DC circuit breaker.

[0005] The trolley is provided with a horizontal emergency tripping lever that moves forward and backward at the bottom of the base plate. The emergency tripping lever is moved forward and backward by a tool. The top of the rear end of the emergency tripping lever has a downwardly concave groove, and the front and rear sides of the groove are upward ramps. The emergency tripping lever is located on the lower side of the base plate and does not contact it.

[0006] The breaking mechanism is connected with a straight rod extending outward, a rotatable connecting arm is sleeved on the rear side of the straight rod, and the rear end of the connecting arm is movably connected to a longitudinal movable column downward, and the bottom end of the movable column is inserted into the groove;

[0007] When the emergency trip rod and the DC circuit breaker move forward and backward relative to each other, the movable column moves upward driven by the ramp of the groove, and the movable column drives the connecting arm to move the straight rod downward, thereby disconnecting the disconnecting mechanism.

[0008] A further improvement is that: the DC circuit breaker is provided with a side plate on the front side, an electromagnet is provided on the front side of the side plate, and an iron horizontal breaking rod is movably connected to the rear side of the electromagnet, and the breaking rod is located below the straight rod and movably connected to it;

[0009] The electromagnet generates magnetism when it is energized, which attracts the iron breaking rod to the right. The breaking rod pulls the straight rod downward, thereby breaking the breaking mechanism.

[0010] A further improvement is that the electromagnet is connected to a control device, and the control device controls the power on and off of the electromagnet.

[0011] A further improvement is that: when the DC circuit breaker is not disconnected, the connecting arm is inclined upward and rearward; when the DC circuit breaker is disconnected, the inclination angle of the connecting arm toward the upper and rearward increases.

[0012] A further improvement is that the front end of the trolley is a baffle, and the lead screw and the emergency tripping rod pass through the baffle forward.

[0013] A further improvement is that the bottom plate is open at the groove, and a through slot block for the movable column to pass through is provided at the top of the opening of the bottom plate.

[0014] The beneficial effects of the present invention are as follows: when disconnection is required, the emergency tripping rod is manually pushed backward on the front side of the trolley. Since the bottom end of the movable column is inserted into the groove of the emergency tripping rod, the movable column is pushed upward, driving the connecting arm to further tilt backward and upward, thereby pulling the straight rod of the disconnecting mechanism to disconnect. The DC circuit breaker can also be moved relative to the emergency tripping rod by manually rotating the screw with a tool on the front side of the trolley. Similarly, since the bottom end of the movable column is inserted into the groove of the emergency tripping rod, the movable column is pushed upward, driving the connecting arm to further tilt backward and upward, thereby pulling the straight rod of the disconnecting mechanism to disconnect. The electromagnet can also be energized to generate magnetism, which will suck the iron disconnecting rod forward, and the disconnecting rod will pull the straight rod downward, thereby disconnecting the disconnecting mechanism. In this way, there are three disconnecting modes, which are very rich and greatly improve safety.

[0015] The present invention performs disconnection by pushing or pulling the emergency trip rod inward or outward outside the baffle, so that the emergency trip rod moves laterally relative to the DC circuit breaker; or by using a tool outside the baffle to move the lead screw inward or outward, so that the DC circuit breaker moves laterally relative to the emergency trip rod, so as to disconnect; or by controlling the electromagnet to generate magnetism through the control device, so as to disconnect the disconnect mechanism.

[0016] The present invention disconnects the DC circuit breaker in three ways: mechanical disconnection and electrical control disconnection. The mechanical disconnection has two disconnection modes, which has good selectivity and guarantees timely disconnection and safety to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the present invention.

[0018] Figure 2 It is a schematic diagram of the present invention with the bottom plate hidden.

[0019] Among them: 1-cart, 2-DC circuit breaker, 3-bottom plate, 4-through slot block, 5-screw, 6-emergency tripping rod, 7-groove, 8-straight rod, 9-connecting arm, 10-movable column, 11-side plate, 12-electromagnet, 13-tripping rod, 14-baffle. DETAILED DESCRIPTION

[0020] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the examples. The examples are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0021] like Figure 1 and 2As shown, this embodiment provides a traction DC circuit breaker fast disconnect device, including a trolley 1, on which a DC circuit breaker 2 is provided. A base plate 3 is provided at the bottom of the DC circuit breaker 2. A screw 5 is connected to the right side of the base plate 3. The screw 5 is rotated by a tool to drive the base plate 3 to move forward and backward on the trolley 1. The DC circuit breaker 2 has a disconnect mechanism, which is connected to a straight rod 8. The straight rod 8 is pulled down to disconnect the disconnect mechanism.

[0022] The mechanical disconnect mechanism is as follows: a horizontal emergency trip lever 6 is installed on the trolley 1 at the bottom of the base plate 3, allowing for forward and backward movement. The emergency trip lever 6 is moved forward and backward at the front of the trolley using a tool. A downwardly recessed groove 7 is located at the top of the rear end of the emergency trip lever 6, with upward ramps on both sides. The emergency trip lever 6 is located below the base plate 3 and does not contact it. The disconnect mechanism is connected to an outwardly extending straight rod 8, which is fitted with a rotatable connecting arm 9 at its rear end. The rear end of the connecting arm 9 is movably connected downward to a longitudinal movable column 10, the bottom end of which is inserted into the groove 7. When the DC circuit breaker 2 is not disconnected, the connecting arm 9 is tilted upward and rearward. When the DC circuit breaker 2 is disconnected, the tilt angle of the connecting arm 9 increases. The front end of the trolley 1 is provided with a baffle 14, through which the lead screw 5 and the emergency trip lever 6 extend forward. The base plate 3 is open at the groove 7, and a slot 4 is provided at the top of the opening to allow the movable column 10 to pass.

[0023] Mechanical disconnection method 1: During disconnection, the emergency trip lever 6 is moved forward or backward on the front side of the trolley. The DC circuit breaker is stationary. Since the bottom end of the movable column 10 is inserted into the groove 7 of the emergency trip lever 6, the movable column 10 pushes upward, driving the connecting arm to tilt further backward and upward, thereby pulling the straight rod 8 of the disconnecting mechanism downward to disconnect.

[0024] Mechanical disconnection method 2: On the front side of the trolley, the lead screw 5 is rotated by a tool to move the DC short-term circuit 2 forward or backward. The emergency trip rod 6 is stationary. Since the bottom end of the movable column 10 is inserted into the groove 7 of the emergency trip rod 6, the movable column 10 pushes upward, driving the connecting arm to further tilt backward and upward, thereby pulling the straight rod 8 of the disconnecting mechanism downward for disconnection.

[0025] Electrically controlled disconnection: The DC circuit breaker 2 is provided with a side plate 11 on the front side, and an electromagnet 12 is installed in front of the side plate 11. A transverse iron disconnect rod 13 is movably connected to the rear side of the electromagnet 12. Disconnect rod 13 is located below and movably connected to the straight rod 8. When electromagnet 12 is energized, it generates magnetism, which attracts the iron disconnect rod 13 to the right. Disconnect rod 13 pulls the straight rod 8 downward, thereby disconnecting the disconnect mechanism. The electromagnet 12 is connected to a control device, which controls the power on and off of the electromagnet 12.

[0026] This embodiment disconnects the DC circuit breaker by pushing or pulling the emergency trip lever inward or outward outside the baffle, causing it to move laterally relative to the DC circuit breaker. Alternatively, a tool is used outside the baffle to move a lead screw inward or outward, causing it to move laterally relative to the emergency trip lever. Alternatively, a control device energizes an electromagnet to generate magnetism, thereby tripping the disconnect mechanism. Three methods are available for disconnecting the DC circuit breaker: mechanical disconnection and electrically controlled disconnection. This provides excellent selectivity, maximizing timely disconnection and ensuring safety.

Claims

1. A traction DC circuit breaker quick disconnect device, comprising a trolley (1), a DC circuit breaker (2) being provided on the trolley (1), a base plate (3) being provided at the bottom of the DC circuit breaker (2), a screw (5) being connected to the right side of the base plate (3), the screw (5) being rotated by a tool to drive the base plate (3) to move forward and backward on the trolley (1), a disconnect mechanism being provided in the DC circuit breaker (2), and characterized in that: The trolley (1) is provided with a horizontal emergency tripping lever (6) that moves forward and backward at the bottom of the base plate (3). The emergency tripping lever (6) moves forward and backward by a tool. A downwardly concave groove (7) is provided at the top of the rear end of the emergency tripping lever (6). The front and rear sides of the groove (7) are upwardly inclined. The emergency tripping lever (6) is located on the lower side of the base plate (3) and does not contact it. The disconnecting mechanism is connected to a straight rod (8) extending outward, a rotatable connecting arm (9) is sleeved on the rear side of the straight rod (8), and a longitudinal movable column (10) is movably connected downward at the rear end of the connecting arm (9), and the bottom end of the movable column (10) is inserted into the groove (7); When the emergency tripping rod (6) and the DC circuit breaker (2) move forward and backward relative to each other, the movable column (10) moves upward under the drive of the ramp of the groove (7), and the movable column (10) drives the connecting arm (9) to move the straight rod (8) downward, thereby disconnecting the disconnecting mechanism; The DC circuit breaker (2) is provided with a side plate (11) on the front side, an electromagnet (12) is provided on the front side of the side plate (11), and an iron transverse breaking rod (13) is movably connected to the rear side of the electromagnet (12), and the breaking rod (13) is located below the straight rod (8) and movably connected thereto; The electromagnet (12) is energized to generate magnetism, which attracts the iron breaking rod (13) to the right, and the breaking rod (13) pulls the straight rod (8) downward, thereby breaking the breaking mechanism; The front end of the trolley (1) is a baffle (14), and the lead screw (5) and the emergency tripping rod (6) pass through the baffle (14) forward.

2. The traction DC circuit breaker rapid disconnect device according to claim 1, characterized in that: The electromagnet (12) is connected to a control device, and the control device controls the power on and off of the electromagnet (12).

3. The traction DC circuit breaker rapid disconnect device according to claim 1, characterized in that: When the DC circuit breaker (2) is not disconnected, the connecting arm (9) is tilted upward and rearward; when the DC circuit breaker (2) is disconnected, the tilt angle of the connecting arm (9) toward the upper and rearward increases.

4. The traction DC circuit breaker rapid disconnect device according to claim 1, characterized in that: The bottom plate (3) is open at the groove (7), and a passing slot block (4) for the movable column (10) to pass through is provided at the top of the opening of the bottom plate (3).

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