An operating mechanism for a vacuum interrupter circuit breaker

Abstract

The application discloses an operating mechanism of a vacuum arc-extinguishing circuit breaker, which comprises a shell, a vacuum arc-extinguishing chamber and a guide rod, a T-shaped circular groove is arranged in the guide rod, a T-shaped circular rod is slidably connected in the T-shaped circular groove of the guide rod, a crowbar is hingedly connected to the lower end of the T-shaped circular rod through a hinge shaft, a hinge seat is arranged at the lower end of the shell, the middle end of the crowbar is hingedly connected in the hinge seat, a circular boss of the shell is provided with a pneumatic cylinder on the outer surface through bolts, a pushing fork is fixed to the end face of the pushing rod at the lower end of the pneumatic cylinder, and the rear end of the crowbar is hingedly connected in the pushing fork. The crowbar can be directly controlled to be turned up and down by the pneumatic cylinder, so that the guide rod can be directly controlled to move upwards to be combined or to move downwards to be separated, the control is facilitated, the structure is simple, and the cost is low.

Description

Technical Field

[0001] This invention relates to the field of circuit breakers, and more specifically, to an operating mechanism for a vacuum arc-extinguishing circuit breaker. Background Technology

[0002] The operating mechanism of traditional indoor AC high-voltage vacuum circuit breakers in power distribution systems is a mechanical drive mechanism, which mainly consists of connecting rods, latches, and energy supply systems.

[0003] Its mechanical drive mechanism has many components, large cumulative motion tolerance, slow response (typically tens of milliseconds), poor controllability, low efficiency, complex structure, and high cost. Summary of the Invention

[0004] To address the problems existing in the prior art, the purpose of this invention is to provide an operating mechanism for a vacuum arc-extinguishing circuit breaker. By using a cylinder to drive a pry bar to rotate up and down, the guide rod can be directly controlled to move upward and merge, and downward and separate, which is easy to control, has a simple structure, and is low in cost.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] An operating mechanism for a vacuum interrupter circuit breaker includes a housing, a vacuum interrupter chamber, and a guide rod. The guide rod has a T-shaped groove, and a T-shaped rod is slidably connected within the T-shaped groove. A pry bar is hinged to the lower end of the T-shaped rod via a hinge shaft. A hinge seat is located at the lower end of the housing, and the middle end of the pry bar is hinged within the hinge seat. A cylinder is bolted to the outer surface of the annular boss on the housing. A push fork is fixed to the end face of the cylinder's lower push rod, and the rear end of the pry bar is hinged within the push fork. The cylinder drives the pry bar to rotate up and down, directly controlling the guide rod to move upwards to merge and downwards to separate, facilitating control, and offering a simple structure and low cost. A sealing partition is provided between the vacuum interrupter chamber and the chamber containing the guide rod, and a pressure block is provided above the sealing partition to press a sealing cover plate.

[0007] The cylinder drives the push fork to descend, causing the front end of the pry bar to tilt upward, lifting the T-shaped round rod and pressing the guide rod to rise and close the circuit; after the cylinder drives the push fork to retract, the front end of the pry bar flips downward, causing the T-shaped round rod and guide rod to move downward, thus opening the circuit.

[0008] Furthermore, the rear end of the outer casing is provided with a strip-shaped opening, and the outer surface of the rear side of the pry bar is slidably connected to the inside of the strip-shaped opening. When flipped, it can slide inside the strip-shaped opening without any obstruction.

[0009] Furthermore, a compression spring is placed on the upper side of the T-shaped groove of the guide rod. When the T-shaped rod presses the compression spring upward, it can drive the T-shaped rod to rise and press the guide rod to rise. Because the compression spring is set by the cylinder control, the compression spring can be buffered and adjusted when the T-shaped rod rises, so as not to damage the internal components.

[0010] Furthermore, the outer surface of the T-shaped rod is wrapped with an insulating rubber layer to improve its insulation performance.

[0011] Furthermore, a triangular support block is fixed to the lower surface of the annular boss of the outer shell, which can support the annular boss and make the cylinder more stable after it is fixed.

[0012] The rotation angle between the pry bar and the hinge shaft, as well as the rotation angle between the pry bar and the push fork, are both 30° to 135°.

[0013] Compared with the prior art, the advantages of this invention are:

[0014] (1) The pry bar is driven up and down by the cylinder, which can directly control the guide bar to move up and merge, and move down and separate. It is easy to control, has a simple structure and low cost.

[0015] (2) A slot is provided at the rear end of the outer casing. The outer surface of the pry bar is slidably connected to the slot. When flipping, it can slide in the slot without obstruction.

[0016] (3) A compression spring is placed on the upper side of the T-shaped groove of the guide rod. When the T-shaped rod presses the compression spring upward, it can drive the T-shaped rod to rise and press the guide rod to rise. Because the compression spring is set by the cylinder, the compression spring can be buffered and adjusted when the T-shaped rod rises, so as not to damage the internal components.

[0017] (4) The outer surface of the T-shaped round rod is wrapped with an insulating rubber layer to improve the insulation performance.

[0018] (5) A triangular support block is fixed on the lower surface of the annular boss of the outer shell, which can support the annular boss and make the cylinder more stable after it is fixed. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a top cross-sectional view showing the connection relationship between the pry bar and the hinge seat in this invention.

[0021] Figure 3 This is a partial structural side view of the push fork of the present invention.

[0022] Explanation of the labels in the diagram:

[0023] 1. Outer shell, 2. Vacuum interrupter chamber, 3. Guide rod, 4. T-shaped circular groove, 5. T-shaped circular rod, 6. Hinge shaft, 7. Pry bar, 8. Hinge seat, 9. Cylinder, 10. Push fork, 100. Strip-shaped opening, 40. Compression spring. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] Please see Figure 1-3 An operating mechanism for a vacuum interrupter circuit breaker includes a housing 1, a vacuum interrupter chamber 2, and a guide rod 3. The guide rod 3 has a T-shaped groove 4, and a T-shaped rod 5 is slidably connected within the T-shaped groove 4. A pry bar 7 is hinged to the lower end of the T-shaped rod 5 via a hinge shaft 6. A hinge seat 8 is located at the lower end of the housing 1, and the middle end of the pry bar 7 is hinged within the hinge seat 8. A cylinder 9 (existing technology) is bolted to the outer surface of the annular boss of the housing 1. A push fork 10 is fixed to the end face of the lower push rod of the cylinder 9, and the rear end of the pry bar 7 is hinged within the push fork 10. A sealing partition is provided between the vacuum interrupter chamber 2 and the chamber containing the guide rod 3, and a pressure block for pressing a sealing cover is provided above the sealing partition.

[0027] Please see Figure 1-3 The outer casing 1 has a slot 100 at its rear end. The outer surface of the pry bar 7 is slidably connected to the slot 100. When flipping, it can slide within the slot 100 without obstruction. A compression spring 40 is placed on the upper side of the T-shaped groove 4 of the guide rod 3. The T-shaped rod 5 presses the compression spring 40 upward. When the pry bar 7 is tilted upward, it can drive the T-shaped rod 5 to rise and press the guide rod 3 to rise. Because it is controlled by the cylinder 9 and the compression spring 40 is set, the compression spring 40 can be buffered and adjusted when the T-shaped rod 5 rises, so as not to damage the internal components. The outer surface of the T-shaped rod 5 is covered with an insulating rubber layer to improve the insulation performance. A triangular support block is fixed on the lower end surface of the annular boss of the outer casing 1 to support the annular boss. The cylinder 9 is fixed to make it more stable.

[0028] In use, a T-shaped groove 4 is provided inside the guide rod 3, and a T-shaped rod 5 is slidably connected inside the T-shaped groove 4 of the guide rod 3. The lower end of the T-shaped rod 5 is hinged to a pry bar 7 through a hinge shaft 6. The lower end of the outer shell 1 is provided with a hinge seat 8, and the middle end of the pry bar 7 is hinged in the hinge seat 8. The outer surface of the annular boss of the outer shell 1 is connected to a cylinder 9 by bolts. The end face of the push rod at the lower end of the cylinder 9 is fixed with a push fork 10. The rear end of the pry bar 7 is hinged in the push fork 10. The cylinder 9 can drive the push fork 10 to descend, which can cause the front end of the pry bar 7 to tilt upward, which can lift the T-shaped rod 5 to rise and squeeze the guide rod 3 to rise and close the circuit.

[0029] The rotation angle between the lever 7 and the hinge shaft 6, as well as the rotation angle between the lever 7 and the push fork 10, are both 30° to 135°, making operation more convenient and efficient when using a large range of motion.

[0030] After the cylinder 9 drives the push fork 10 to retract, the front end of the pry bar 7 can be flipped downwards, causing the T-shaped round rod 5 and the guide rod 3 to move downwards, which can open the gate. It is easy to control directly, with fewer linkage mechanisms, low cost and high efficiency.

[0031] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. An operating mechanism for a vacuum arc-extinguishing circuit breaker, comprising a housing (1), a vacuum arc-extinguishing chamber (2), and a guide rod (3), characterized in that: The guide rod (3) has a T-shaped groove (4) inside, and a T-shaped rod (5) is slidably connected in the T-shaped groove (4) of the guide rod (3). The lower end of the T-shaped rod (5) is hinged to a pry bar (7) through a hinge shaft (6). The lower end of the outer shell (1) has a hinge seat (8). The middle end of the pry bar (7) is hinged in the hinge seat (8). The outer surface of the annular boss of the outer shell (1) is bolted to a cylinder (9). The end face of the push rod at the lower end of the cylinder (9) is fixed. There is a push fork (10), and the rear end of the pry bar (7) is hinged in the push fork (10); the cylinder drives the push fork to descend, causing the front end of the pry bar to tilt upward, lifting the T-shaped round rod and squeezing the guide rod to rise and close the circuit; after the cylinder drives the push fork to retract, the front end of the pry bar flips downward, causing the T-shaped round rod and the guide rod to move downward, thereby opening the circuit; a sealing partition is provided between the vacuum interrupter chamber (2) and the chamber where the guide rod (3) is located, and a pressure block for pressing the sealing cover is provided above the sealing partition; The outer casing (1) has a slot (100) at its rear end, and the outer surface of the pry bar (7) is slidably connected to the slot (100) on its rear side. The guide rod (3) has a T-shaped groove (4) inside, and a T-shaped rod (5) is slidably connected in the T-shaped groove (4) of the guide rod (3). The lower end of the T-shaped rod (5) is hinged to a pry bar (7) through a hinge shaft (6). The lower end of the outer shell (1) is provided with a hinge seat (8). The middle end of the pry bar (7) is hinged in the hinge seat (8). The outer surface of the annular boss of the outer shell (1) is connected to a cylinder (9) by bolts. The end face of the push rod at the lower end of the cylinder (9) is fixed with a push fork (10). The rear end of the pry bar (7) is hinged in the push fork (10). The cylinder (9) drives the push fork (10) to descend, causing the front end of the pry bar (7) to tilt upward, lifting the T-shaped rod (5) to rise, and squeezing the guide rod (3) to rise and close the circuit.

2. The operating mechanism of a vacuum arc-extinguishing circuit breaker according to claim 1, characterized in that: A compression spring (40) is placed on the upper side of the T-shaped groove (4) of the guide rod (3), and the T-shaped rod (5) presses the compression spring (40) upward.

3. The operating mechanism of a vacuum arc-extinguishing circuit breaker according to claim 1, characterized in that: The outer surface of the T-shaped round rod (5) is covered with an insulating rubber layer.

4. The operating mechanism of a vacuum arc-extinguishing circuit breaker according to claim 1, characterized in that: A triangular support block is fixed to the lower surface of the annular boss of the outer shell (1).

5. The operating mechanism of a vacuum arc-extinguishing circuit breaker according to claim 1 or 2, characterized in that: The rotation angle between the pry bar (7) and the hinge shaft (6) and the rotation angle between the pry bar (7) and the push fork (10) are both 30° to 135°.

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