35kV handcart type quick circuit breaker

Abstract

The utility model discloses a 35kV handcart type fast circuit breaker, comprising a mechanism box body, an eddy current repulsion mechanism is arranged in the mechanism box body, the output end of the eddy current repulsion mechanism is arranged on a transmission assembly, and the eddy current repulsion mechanism is connected with the transmission assembly through a guide assembly; the main conductive loop assembly comprises an insulating pull rod; the eddy current repulsive force mechanism discharges the coil through the capacitor assembly, the eddy current disc forms eddy current to generate repulsive force, the transmission assembly pulls the insulation pull rod to move, and opening and closing actions are achieved. According to the utility model, the eddy current repulsion mechanism is adopted, so that the switching-on and switching-off time is short, the starting is fast, and small-range protection of line current protection can be realized; transmission is simple and reliable, and service life is long; the appearance and the interface size are consistent with those of a conventional spring mechanism circuit breaker, and interchangeability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a 35kV trolley-type fast circuit breaker. Background Art

[0002] At present, fast circuit breaker technology is commonly used in power systems. In the mode of limiting system short-circuit current, 10 or 35kV single-phase fast circuit breakers are usually used in combination with long-time reactors to form a zero-loss deep current limiting device; in the mode of suppressing system voltage sag, 10 or 35kV fast circuit breakers are usually used in combination with short-time reactors to form a bus residual voltage preservation device; in the fault line selection mode, phase-splitting fast circuit breakers are used to form arc extinguishing selection devices; in the dual power switching mode, fast circuit breakers are used to form a complete set of fast switching devices. In the field of DC circuit breakers, fast circuit breakers are used to quickly cut off the short-circuit current of the main current branch.

[0003] In common 35kV distribution network systems, they usually use spring operating mechanisms or permanent magnetic operating mechanisms. The response time of the circuit breakers matched with these mechanisms is relatively slow. The opening time of the matching circuit breakers is generally greater than 30ms, and the closing time is greater than 45ms. The opening time of the specially designed and manufactured permanent magnetic mechanism circuit breaker can be controlled between 12-15ms. Too long opening and closing time is not conducive to the rapid isolation of faults, and problems such as large-scale power outages and voltage sags will occur. It is also not conducive to the realization of small differential current protection. Utility Model Content

[0004] The main purpose of the utility model is to provide a 35kV trolley-type fast circuit breaker, aiming to solve the existing technical problems.

[0005] To achieve the above purpose, the utility model provides a 35kV trolley-type fast circuit breaker, comprising:

[0006] A mechanism box, in which an eddy current repulsion mechanism is arranged, an output end of the eddy current repulsion mechanism is arranged on a transmission assembly, and the eddy current repulsion mechanism and the transmission assembly are connected via a guide assembly;

[0007] Main conductive circuit assembly, including insulating tie rods;

[0008] The eddy current repulsion mechanism discharges the coil therein through the capacitor component, and the eddy current disk forms an eddy current to generate repulsion, which pulls the insulating pull rod to move through the transmission component to achieve opening and closing actions.

[0009] Furthermore, the transmission assembly includes a driving square shaft, on which an A-phase bracket, a B-phase bracket and a C-phase bracket are arranged in sequence, and the B-phase bracket is provided with a crank arm, which is connected to the upper end of the fisheye joint bearing, and the lower end of the fisheye joint bearing is connected to the central axis screw in the eddy current repulsion mechanism.

[0010] Furthermore, the crank arm has three ends a, b, and c, all of which are provided with axle pins, and the a end and the c end are respectively connected to the B-phase bracket and the upper end of the fisheye joint bearing through the axle pin.

[0011] Furthermore, the transmission assembly also includes an interlocking bent plate fixed on the driving square shaft.

[0012] Furthermore, an auxiliary switch assembly is also provided in the mechanism box.

[0013] Furthermore, it also includes a roller assembly, a five-protection assembly, a propulsion mechanism and a door panel.

[0014] Furthermore, the mechanism box is also provided with a power supply component for supplying power to the capacitor component, an opening and closing indication component for observing the closing and opening states of the switch, and a grounding contact component for grounding.

[0015] The beneficial effects of the utility model are embodied in:

[0016] In the utility model, an eddy current repulsion mechanism is adopted, the opening and closing time is short, the starting is fast, and small differential protection of line current protection can be realized; the transmission is simple and reliable, and the service life is long; the appearance and interface size are consistent with those of conventional spring mechanism circuit breakers, and the interchangeability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the circuit breaker of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the mechanism box of the utility model;

[0019] Figure 3 This is a schematic diagram of the transmission assembly structure of the utility model;

[0020] Figure 4 It is a schematic diagram of the crank arm structure of the utility model.

[0021] Description of reference numerals:

[0022] 1. Roller assembly; 2. Five-protection assembly; 3. Mechanism box; 4. Main conductive circuit assembly; 5. Door panel; 6. Propulsion mechanism;

[0023] 31. Capacitor assembly; 32. Transmission assembly; 33. Auxiliary switch assembly; 34. Guide assembly; 35. Power supply assembly; 36. Opening and closing indication assembly; 37. Eddy current repulsion mechanism; 38. Grounding contact assembly;

[0024] 321, A-phase bracket; 322, needle bearing; 323, driving square shaft; 324, connecting plate; 325, B-phase bracket; 326, pulling head; 327, first axle pin; 328, crank arm; 329, second axle pin; 3210, C-phase bracket; 3211, third axle pin; 3212, fisheye spherical bearing; 3213, fourth axle pin; 3214, interlocking bent plate. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-3 The utility model provides a 35kV trolley-type fast circuit breaker, comprising:

[0027] The mechanism box 3 has an eddy current repulsion mechanism 37 disposed therein, the output end of the eddy current repulsion mechanism 37 is disposed at the transmission assembly 32, and the eddy current repulsion mechanism 37 is connected to the transmission assembly 32 via a guide assembly 34;

[0028] The main conductive circuit assembly 4 includes an insulating pull rod;

[0029] The eddy current repulsion mechanism 37 discharges the coil therein through the capacitor assembly 31, and the eddy current disk forms an eddy current to generate repulsion, which pulls the insulating pull rod to move through the transmission assembly 32 to achieve the opening and closing actions.

[0030] During normal operation, the power supply component 35 has pre-charged the capacitor component 31; when the switch closing and opening action is required, the power supply component 35 controls the capacitor component 31 to discharge the coil in the eddy current repulsion mechanism 37, and the eddy current disk in the eddy current repulsion mechanism 37 forms an eddy current, thereby generating a repulsive force to drive the entire transmission system to move.

[0031] The main conductive circuit assembly 4 mainly includes a sealed pole, a contact arm, an insulating sleeve, and a plum blossom contact.

[0032] The capacitor assembly 31 is installed on the bottom plate of the mechanism box 3, and the capacitor can be a film capacitor or an electrolytic capacitor.

[0033] This embodiment adopts an eddy current repulsion mechanism, which has a short opening and closing time and a fast starting, and can achieve small differential protection for line current protection; the transmission is simple and reliable, and the service life is long; the appearance and interface dimensions are consistent with those of conventional spring mechanism circuit breakers, and the interchangeability is strong.

[0034] Preferably, the eddy current repulsion mechanism 37 adopts a double-coil bistable structure, and the coil is installed in a groove of the epoxy plate; the eddy current repulsion mechanism 37 serves as a driving source of power and is vertically installed at the bottom of the mechanism box 3.

[0035] In one embodiment, see Figure 3 The transmission assembly 32 includes a driving square shaft 323, on which an A-phase bracket 321, a B-phase bracket 325 and a C-phase bracket 3210 are arranged in sequence. The B-phase bracket 325 is provided with a crank arm 328, which is connected to the upper end of the fisheye joint bearing 3212, and the lower end of the fisheye joint bearing 3212 is connected to the central axis screw in the eddy current repulsion mechanism 37.

[0036] Specifically, a connecting plate 324 is provided on the A phase bracket 321, one end of the connecting plate 324 is connected to a pull head 326, and the other end is connected to the driving square shaft 323 through a needle bearing 322 and a second shaft pin 329. The B phase bracket 325 and the C phase bracket 3210 have the same connection structure as the A phase bracket 321.

[0037] In one embodiment, see Figure 3 and Figure 4 The crank arm 328 has three ends a, b, and c, all of which are provided with shaft pins, and the a end and the c end are respectively connected to the B-phase bracket 325 and the upper end of the fisheye joint bearing 3212 through shaft pins. Specifically, the a end of the crank arm 328 is connected to the B-phase bracket 325 through the first shaft pin 327, the c end is connected to the upper end of the fisheye joint bearing 3212 through the third shaft pin 3211, and the b end is provided with a fourth shaft pin 3213.

[0038] In one embodiment, see Figure 3 The transmission assembly 32 also includes an interlocking bent plate 3214 fixed on the driving square shaft 323.

[0039] In this embodiment, the interlocking bent plate 3214 also moves left and right during the closing and opening actions; when in the opening position, the interlocking bent plate 3214 will make way for the swing rod in the propulsion mechanism 6 to rotate, so that the propulsion mechanism 6 can be rocked in and out. When in the closing position, the interlocking bent plate 3214 will block the rotation of the swing rod in the propulsion mechanism 6, thereby preventing the propulsion mechanism 6 from rocking in and out to achieve the purpose of five protections.

[0040] In one embodiment, an auxiliary switch assembly 33 is further disposed in the mechanism housing 3 .

[0041] In one embodiment, see Figure 1 , and also includes a roller assembly 1, a five-protection assembly 2, a propulsion mechanism 6 and a door panel 5.

[0042] The roller assembly 1 is mainly composed of a roller, a U-shaped bending plate, and an axle pin; the roller assembly 1 is installed on each of the left and right sides of the mechanism box 3, and the roller is installed on the U-shaped bending plate and fixed with an axle pin. The function of the roller assembly 1 is to move in the guide rail when entering and exiting the cabinet to achieve isolation between the working position and the maintenance position;

[0043] The five-protection assembly 7 is mainly composed of a roller sleeve, an axle pin, a bent plate, and a fixed rod. Its function is to cooperate with the valve mechanism in the cabinet to achieve high-voltage isolation of the equipment when entering and exiting the cabinet;

[0044] The door panel 5 is provided with an observation window for observing the main circuit status, and a handle for transferring and pulling the switch;

[0045] The function of the propulsion mechanism 6 is to cooperate with the cabinet to realize the swinging in and out of the circuit breaker in the cabinet.

[0046] In one embodiment, see Figure 2 The mechanism box 3 is also provided with a power supply component 35 for supplying power to the capacitor component 31, an opening and closing indication component 36 for observing the closing and opening states, and a grounding contact component 38 for grounding.

[0047] The specific working process of the circuit breaker in this application is as follows:

[0048] When the circuit breaker needs to close or open, the power supply assembly 35 has pre-charged the capacitor assembly 31; when the circuit breaker needs to close or open, the power supply controls the capacitor to discharge the coil in the eddy current repulsion mechanism 37, and the eddy current disk forms an eddy current to generate a repulsive force to drive the entire transmission system to move. When closing, the central axis screw in the eddy current repulsion mechanism 37 pushes the fisheye joint bearing 3212 to move downward, and the crank arm 328 rotates clockwise with the shaft pin 3213 as the fulcrum, driving the driving square shaft 323 to move horizontally to the right. At the same time, under the action of the connecting plate 324, the driving pull head 326 pushes the insulating pull rod in the main conductive circuit assembly 4 vertically upward to achieve the closing operation. When opening the switch, the central axis screw in the eddy current repulsion mechanism 37 pushes the fisheye joint bearing 3212 to move upward, and the crank arm 328 rotates counterclockwise with the shaft pin 3213 as the fulcrum, driving the driving square shaft 323 to move horizontally to the left. At the same time, under the action of the connecting plate 324, the driving pull head 326 pulls the insulating pull rod in the main conductive circuit assembly 4 vertically downward to realize the opening operation.

[0049] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0050] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that satisfy both A and B. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist.

[0051] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A 35kV trolley-type fast circuit breaker, characterized in that ,include: A mechanism box (3) is provided with an eddy current repulsion mechanism (37) therein, wherein an output end of the eddy current repulsion mechanism (37) is provided at a transmission assembly (32), and the eddy current repulsion mechanism (37) is connected to the transmission assembly (32) via a guide assembly (34); A main conductive circuit assembly (4), comprising an insulating pull rod; The eddy current repulsion mechanism (37) discharges the coil therein through the capacitor component (31), and the eddy current disk forms an eddy current to generate a repulsive force, which pulls the insulating pull rod to move through the transmission component (32), thereby realizing the opening and closing actions.

2. A 35kV trolley-type fast circuit breaker as claimed in claim 1, characterized in that: The transmission assembly (32) comprises a driving square shaft (323), on which an A-phase bracket (321), a B-phase bracket (325) and a C-phase bracket (3210) are arranged in sequence; the B-phase bracket (325) is provided with a crank arm (328), the crank arm (328) is connected to the upper end of a fisheye joint bearing (3212), and the lower end of the fisheye joint bearing (3212) is connected to a central axis screw in an eddy current repulsion mechanism (37).

3. A 35kV trolley-type fast circuit breaker as claimed in claim 2, characterized in that: The crank arm (328) has three ends a, b, and c, all of which are provided with shaft pins, and the a end and the c end are respectively connected to the B-phase bracket (325) and the upper end of the fisheye joint bearing (3212) through the shaft pins.

4. A 35kV trolley-type fast circuit breaker as claimed in claim 2, characterized in that: The transmission assembly (32) further comprises an interlocking bent plate (3214) fixed on the driving square shaft (323).

5. A 35kV trolley-type fast circuit breaker as claimed in claim 1, characterized in that: An auxiliary switch assembly (33) is also provided in the mechanism box (3).

6. A 35kV trolley-type fast circuit breaker as claimed in claim 1, characterized in that: It also includes a roller assembly (1), a five-protection assembly (2), a propulsion mechanism (6) and a door panel (5).

7. A 35kV trolley-type fast circuit breaker as claimed in claim 1, characterized in that: The mechanism housing (3) is also provided with a power supply component (35) for supplying power to the capacitor component (31), an opening / closing indication component (36) for observing the closing / opening state, and a grounding contact component (38) for grounding.

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