High-voltage circuit breaker control mechanism

Abstract

The utility model discloses a high-voltage circuit breaker control mechanism, and relates to the technical field of high-voltage circuit breaker control. The device comprises a movable main shaft, a fixed end, a movable end, a magnetic ring and a coil structure, wherein the magnetic ring is arranged between an inner pole body and an outer pole body of the fixed end; a plurality of supporting columns are arranged at the lower end of the outer pole body in an annular array mode, a lower cover body is fixed to the lower ends of the supporting columns, the portions, between the outer pole body and the lower cover body, of the supporting columns are slidably sleeved with movable end heads, and coil structures are arranged on the inner walls of the movable end heads; the movable main shaft penetrates through the upper cover body, the fixed end, the movable end and the lower cover body from top to bottom. According to the utility model, the structure of the permanent magnetic mechanism as a control mechanism is improved, so that the design is more compact; the control mechanism is applied to the high-voltage circuit breaker, so that a permanent magnetic mechanism, a static contact, a moving contact and a vacuum arc-extinguishing chamber of the high-voltage circuit breaker can be arranged in the same vertical shell, the size of the high-voltage circuit breaker is effectively compressed, and the high-voltage circuit breaker can be applied in a narrow space.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage circuit breaker control, in particular to a high-voltage circuit breaker control mechanism. Background Art

[0002] High-voltage circuit breakers are the main control equipment in circuits above 1000KV, and the control mechanism used to control the opening and closing of the circuit breaker is the core component of the circuit breaker. Permanent magnet mechanism is a commonly used control mechanism for high-voltage circuit breakers. Due to its complex structure and large space occupation, it is generally impossible to place it in a housing of the circuit breaker with the vacuum arc extinguishing chamber. Instead, the permanent magnet mechanism must be placed in a separately set drive housing, and then the connecting rod is used to drive the moving contact inserted into the vacuum arc extinguishing chamber in the circuit breaker to move, thereby controlling the opening and closing of the circuit breaker. For example, the Chinese invention patent "Single-phase operated three-phase permanent magnet mechanism indoor high-voltage circuit breaker" with publication number CN104299836A is a structural form in which the permanent magnet mechanism is externally installed.

[0003] The above existing design results in a large overall volume of the high-voltage circuit breaker, which cannot be used in narrow spaces such as underground explosion-proof switches. If the existing permanent magnet mechanism is simply designed with a reduced size and placed in the same housing as the vacuum interrupter, the magnetic flux will be reduced, reducing the pulling force on the moving contact, and cannot meet the needs of rapid power-off of high-voltage circuits.

[0004] In view of this, the applicant has developed a high-voltage circuit breaker control mechanism that adopts an intensive design while ensuring sufficient driving force for the moving contact, so that the moving and static contacts can quickly and fully contact when the circuit breaker is closed, avoiding an open circuit. Utility Model Content

[0005] The purpose of the utility model is to provide a high-voltage circuit breaker control mechanism in order to solve the above-mentioned problems.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-voltage circuit breaker control mechanism, comprising an upper cover body, a lower cover body, a movable spindle, an inner spring, an outer spring, a fixed end, a movable end, a magnetic ring and a coil structure, wherein the fixed end comprises an outer pole body and an inner pole body, the outer pole body and the inner pole body are coaxially fixed at the lower end of the upper cover body from the outside to the inside, and a magnetic ring is installed between the inner pole body and the outer pole body; a plurality of support columns are arranged in a circular array at the lower end of the outer pole body, the lower cover body is fixed at the lower end of the support columns, a movable end is slidably sleeved on the support columns between the outer pole body and the lower cover body, and a coil structure is arranged on the inner wall of the movable end; the movable spindle penetrates the upper cover body, the fixed end, the movable end and the lower cover body from top to bottom; an adjusting nut is installed through a thread on the outer wall of one end of the movable spindle that passes downward through the movable end.

[0007] As a further solution of the utility model: an annular boss is arranged on the outer wall of the shaft body where the movable main shaft is located inside the fixed end head, an inner spring is sleeved on the movable main shaft, the upper end of the inner spring is pressed against the annular boss, and the lower end of the inner spring is pressed against the movable end head; an outer spring is sleeved outside the inner spring, the upper end of the outer spring is pressed against the upper cover body or the fixed end head, and the lower end of the outer spring is pressed against the movable end head.

[0008] As a further solution of the utility model, the inner spring and the outer spring are coaxially mounted and do not interfere with each other during the expansion and contraction process.

[0009] As a further solution of the utility model: the movable end head is in a circular ring shape, and a through hole matching the movable main shaft is provided in the central axis of the movable end head. An inner ring groove and an outer ring groove with open upper ends are coaxially provided on the movable end head from the outside to the inside, and the lower ends of the inner spring and the outer spring are pressed against the lower bottom surface of the inner ring groove, and the coil structure is arranged in the outer ring groove.

[0010] As a further solution of the utility model: a guide hole that passes through the movable end head and matches the number and position of the support columns is opened up and down, and the movable end head is slidably mounted on the support column through the guide hole; the diameter of the guide hole is larger than the outer wall thickness of the outer ring groove and forms a strip groove that passes through the inside and outside.

[0011] As a further solution of the present invention: the coil structure comprises a coil support, and a coil winding group is wound on the coil support.

[0012] As a further solution of the utility model: the magnetic ring includes more than three permanent magnet blocks, and the permanent magnet blocks are arranged in a ring array around the central axis of the inner body.

[0013] As a further solution of the utility model: a copper sleeve is fixed below the upper cover, the upper end of the outer spring is pressed against the copper sleeve, and the lower end of the outer spring is pressed against the movable end.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model improves the structure of the permanent magnet mechanism as a control mechanism, making its design more compact; in particular, the improvement of the movable end structure makes it synchronously contact with the outer pole body and the inner pole body of the fixed end, thereby increasing the magnetic flux and improving the driving force for moving the movable contact, making the circuit breaker suitable for various specifications of high-voltage circuit switching operations and more universal.

[0016] In addition, by specially designing the guide hole opened on the movable end, the diameter of the guide hole is larger than the outer wall thickness of the outer ring groove and a strip groove is formed that runs through the inside and outside, which can further optimize the distribution of magnetic flux lines inside the movable end, reduce eddy currents, and reduce magnetic losses.

[0017] 2. Applying the control mechanism described in the utility model to a high-voltage circuit breaker can enable the permanent magnet mechanism, static contact, moving contact, and vacuum interrupter of the high-voltage circuit breaker to be arranged in the same vertical housing, effectively compressing the volume of the high-voltage circuit breaker so that it can be used in a small space. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the utility model (excluding the upper cover);

[0020] Figure 3 It is a schematic diagram of the internal structure of the utility model (excluding the coil winding group);

[0021] Figure 4 It is a schematic diagram of the installation structure of the fixed end head and the magnetic ring of the utility model;

[0022] Figure 5 It is a three-dimensional structural schematic diagram of the movable end of the utility model;

[0023] Figure 6 The utility model is a schematic diagram of the installation structure applied to a high-voltage circuit breaker.

[0024] In the figure: 1. outer shell; 2. upper terminal; 3. lower terminal; 4. moving contact; 5. insulator; 6. permanent magnet mechanism; 601. fixed end; 6011. inner pole body; 6012. outer pole body; 602. movable end; 6021. through hole; 6022. inner ring groove; 6023. guide hole; 6024. outer ring groove; 603. adjusting nut; 604. lower cover; 605. support column; 606. upper cover; 607. movable spindle; 608. permanent magnet block; 609. outer spring; 610. inner spring; 611. coil bracket; 7. static contact; 8. vacuum arc chamber. 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. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figures 1 to 6The utility model discloses a high-voltage circuit breaker control mechanism, comprising an upper cover 606, a lower cover 604, a movable main shaft 607, an inner spring 610, an outer spring 609, a fixed end 601, a movable end 602, a magnetic ring and a coil structure, wherein the fixed end 601 comprises an outer pole body 6012 and an inner pole body 6011, the outer pole body 6012 and the inner pole body 6011 are coaxially fixed to the lower end of the upper cover 606 from the outside to the inside, and a magnetic ring is installed between the inner pole body 6011 and the outer pole body 6012; a plurality of supporting rings are arranged in an annular array at the lower end of the outer pole body 6012; Column 605, the lower end of the support column 605 is fixed with a lower cover body 604, a movable end 602 is slidably mounted on the support column 605 between the outer pole 6012 and the lower cover body 604, and a coil structure is arranged on the inner wall of the movable end 602; the movable main shaft 607 penetrates the upper cover body 606, the fixed end 601, the movable end 602 and the lower cover body 604 from top to bottom; the upper end of the movable main shaft 607 is connected to the moving contact 4 through the insulator 5, and an adjusting nut 603 is threadedly installed on the outer wall of one end of the movable main shaft 607 that passes through the movable end 602 downward.

[0027] An annular boss is arranged on the outer wall of the shaft body of the movable main shaft 607 located inside the fixed end head 601, and an inner spring 610 is installed on the movable main shaft 607, the upper end of the inner spring 610 is pressed against the annular boss, and the lower end of the inner spring 610 is pressed against the movable end head 602; an outer spring 609 is installed outside the inner spring 610, the upper end of the outer spring 609 is pressed against the upper cover body 606 or the fixed end head 601, and the lower end of the outer spring 609 is pressed against the movable end head 602.

[0028] The inner spring 610 and the outer spring 609 are coaxially mounted and do not interfere with each other during the expansion and contraction process.

[0029] The movable end head 602 is in a circular shape, and a through hole 6021 matching the movable main shaft 607 is provided on the central axis of the movable end head 602. An inner ring groove 6022 and an outer ring groove 6024 with open upper ends are coaxially provided on the movable end head 602 from the outside to the inside. The lower ends of the inner spring 610 and the outer spring 609 are pressed against the lower bottom surface of the inner ring groove 6022, and the coil structure is arranged in the outer ring groove 6024.

[0030] A guide hole 6023 is provided on the movable end 602 to pass through the upper and lower parts and matches the number and position of the support column 605. The movable end 602 is slidably mounted on the support column 605 through the guide hole 6023. The diameter of the guide hole 6023 is larger than the outer wall thickness of the outer ring groove 6024 and forms a strip groove passing through the inside and outside.

[0031] The coil structure includes a coil support 611 , on which a coil winding group is wound.

[0032] The magnetic ring includes more than three permanent magnet blocks 608, and the permanent magnet blocks 608 are arranged in a ring array around the central axis of the inner body.

[0033] A copper sleeve is fixed below the upper cover 606 , the upper end of the outer spring 609 is pressed against the copper sleeve, and the lower end of the outer spring 609 is pressed against the movable end 602 .

[0034] When the utility model is applied to a high voltage circuit breaker, its structure is as follows Figure 6 As shown, the high-voltage circuit breaker includes a shell 1, in which a static contact 7, a moving contact 4, a vacuum interrupter 8, an insulator 5 and a permanent magnet mechanism 6 are arranged. The upper end of the static contact 7 is connected to the upper terminal 2, and the lower end of the static contact 7 is inserted into the vacuum interrupter 8; the lower end of the moving contact 4 is connected to the movable main shaft 607 of the permanent magnet mechanism 6 through the insulator 5, the upper end of the moving contact 4 is slidably inserted into the vacuum interrupter 8, and the moving contact 4 is connected to the lower terminal 3.

[0035] The working principle of the high voltage circuit breaker is as follows:

[0036] First, the adjusting nut 603 is rotated to make the distance between the adjusting nut 603 and the bottom of the movable end 602 meet the set value of the overtravel. The adjusting nut 603 cooperates with the setting of the inner spring 610, so that even if the moving contact 4 and the stationary contact 7 are worn out after long-term use, the elastic force of the inner spring 610 and the compensation of the overtravel can be used to push the moving contact 4 to continue to move forward for a period of overtravel after completing the opening distance movement, so as to ensure that the moving contact 4 and the stationary contact 7 can fully contact each other when closing the circuit breaker, and avoid the open circuit condition of incomplete closure.

[0037] When the coil structure is charged to generate magnetic force, the movable end 602 is attracted by the magnetic ring and moves upward along the support column 605 until it is attracted to the fixed end 601. During the upward movement of the movable end 602, the inner spring 610 can be synchronously driven to move upward and be compressed, and at the same time, an upward thrust is given to the movable main shaft 607. Under the action of this thrust, the movable main shaft 607 drives the insulator 5 and the moving contact 4 to move upward until the moving contact 4 contacts the static contact 7 in the vacuum arc extinguishing chamber 8, completing the closing operation.

[0038] When the power is cut off to the coil structure, the magnetic force weakens and gradually disappears. Since the outer spring 609 is always in a compressed state, the movable end 602 is quickly separated from the fixed end 601 under the strong rebound action of the outer spring 609. When the movable end 602 moves downward along the support column 605, it first moves a preset overtravel, and then contacts the adjusting nut 603 and drives the movable main shaft 607 to move downward through the adjusting nut 603. The movable main shaft 607 can drive the moving contact 4 to quickly separate from the static contact 7 through the insulator 5 to complete the opening operation.

[0039] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high voltage circuit breaker control mechanism, characterized in that: The invention comprises an upper cover body (606), a lower cover body (604), a movable main shaft (607), an inner spring (610), an outer spring (609), a fixed end head (601), a movable end head (602), a magnetic ring and a coil structure, wherein the fixed end head (601) comprises an outer pole body (6012) and an inner pole body (6011), the outer pole body (6012) and the inner pole body (6011) are coaxially fixed to the lower end of the upper cover body (606) from the outside to the inside, and a magnetic ring is installed between the inner pole body (6011) and the outer pole body (6012); a plurality of support rings are arranged in an annular array at the lower end of the outer pole body (6012); A support column (605) is fixed at the lower end of the support column (605) with a lower cover body (604); a movable end head (602) is slidably mounted on the support column (605) between the outer pole body (6012) and the lower cover body (604); a coil structure is arranged on the inner wall of the movable end head (602); the movable main shaft (607) penetrates the upper cover body (606), the fixed end head (601), the movable end head (602) and the lower cover body (604) from top to bottom; and an adjusting nut (603) is installed on the outer wall of one end of the movable main shaft (607) passing through the movable end head (602) downward through a thread.

2. A high voltage circuit breaker control mechanism according to claim 1, characterized in that: The movable main shaft (607) is located inside the fixed end (601), and an annular boss is arranged on the outer wall of the shaft body. An inner spring (610) is sleeved on the movable main shaft (607), and the upper end of the inner spring (610) is pressed against the annular boss, and the lower end of the inner spring (610) is pressed against the movable end (602); an outer spring (609) is sleeved outside the inner spring (610), and the upper end of the outer spring (609) is pressed against the upper cover (606) or the fixed end (601), and the lower end of the outer spring (609) is pressed against the movable end (602).

3. A high voltage circuit breaker control mechanism according to claim 2, characterized in that: The inner spring (610) and the outer spring (609) are coaxially mounted and do not interfere with each other during the expansion and contraction process.

4. A high voltage circuit breaker control mechanism according to claim 2, characterized in that: The movable end head (602) is in the shape of a ring. A through hole (6021) matching the movable main shaft (607) is provided on the central axis of the movable end head (602). An inner ring groove (6022) and an outer ring groove (6024) with an open upper end are coaxially provided on the movable end head (602) from the outside to the inside. The lower ends of the inner spring (610) and the outer spring (609) are pressed against the lower bottom surface of the inner ring groove (6022), and the coil structure is arranged in the outer ring groove (6024).

5. A high voltage circuit breaker control mechanism according to claim 4, characterized in that: The movable end head (602) is provided with guide holes (6023) penetrating up and down and matching the number and position of the support column (605), and the movable end head (602) is slidably mounted on the support column (605) through the guide holes (6023); the diameter of the guide holes (6023) is larger than the outer wall thickness of the outer ring groove (6024) and forms a strip-shaped slot penetrating inside and outside.

6. A high voltage circuit breaker control mechanism according to claim 1, characterized in that: The coil structure comprises a coil support (611), on which a coil winding group is wound.

7. A high voltage circuit breaker control mechanism according to claim 1, characterized in that: The magnetic ring comprises more than three permanent magnet blocks (608), and the permanent magnet blocks (608) are arranged in a ring array around the central axis of the inner body.

8. A high voltage circuit breaker control mechanism according to claim 1, characterized in that: A copper sleeve is fixed below the upper cover (606), the upper end of the outer spring (609) is pressed against the copper sleeve, and the lower end of the outer spring (609) is pressed against the movable end (602).

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