Mechanical interlocking device for high-voltage electrical equipment

Abstract

This invention relates to the field of high-voltage switches, specifically a mechanical interlocking device for high-voltage electrical equipment. It is used to interlock or de-interlock a drive shaft of electrical equipment one and a drive shaft of electrical equipment two. The device includes a drive line, a return spring, a pawl, a ratchet, a crank arm, and a guide assembly. The guide assembly has a wire-passing channel. The crank arm is mounted on the drive shaft of electrical equipment two. The pawl rotates in a fixed position at its center, with one end serving as a connecting end and the other as a limiting pawl. The ratchet is mounted on the drive shaft of electrical equipment one, and its outer circumference has multiple evenly distributed ratchet grooves. The drive line passes through the wire-passing channel, and its two ends are connected to the outer end of the crank arm and the connecting end of the pawl, respectively. The return spring is tensioned between the guide assembly and the connecting end of the pawl. This invention, perfectly combined with electrical interlocking, provides a universal mechanical interlocking system applicable to high-voltage electrical equipment, achieving double interlocking, reducing the risk of misoperation, and improving equipment and personal safety.

Description

Technical Field

[0001] This invention relates to the field of high-voltage switches, and in particular to a mechanical interlocking device for high-voltage electrical equipment. Background Technology

[0002] Interlocking between high-voltage electrical equipment is a crucial measure to meet the five electrical safety requirements, ensure the safe operation of the power grid, guarantee equipment and personnel safety, and prevent misoperation. Interlocking is generally divided into mechanical interlocking and electrical interlocking. In current high-voltage electrical equipment control systems, due to limitations in equipment installation location and varying equipment structures, the vast majority of electrical equipment can only use electrical interlocking schemes. However, electrical interlocking circuits are complex and have poor visibility, thus posing risks and hazards for maintenance personnel to misoperate. Summary of the Invention

[0003] The purpose of this invention is to address the problems existing in the background technology by proposing a mechanical interlocking device for high-voltage electrical equipment, which is perfectly integrated with electrical interlocking. It is a mechanical interlocking device applicable to high-voltage electrical equipment, realizing double interlocking, reducing the risk of misoperation, and improving the safety factor of equipment and personnel.

[0004] The present invention provides a mechanical interlocking device for high-voltage electrical equipment, used to interlock or de-interlock a drive shaft of electrical equipment 1 and a drive shaft of electrical equipment 2. The device includes a drive line, a return spring, a pawl, a ratchet, a crank arm, and a guide assembly. The guide assembly has a wire-passing channel. The crank arm is mounted on the drive shaft of electrical equipment 2. The pawl rotates in a fixed position at its center, with one end serving as a connecting end and the other as a limiting pawl. The ratchet is mounted on the drive shaft of electrical equipment 1, and its outer circumference has multiple evenly distributed ratchet grooves. The drive line passes through the wire-passing channel, and both ends of the drive line are connected to the outer end of the crank arm and the connecting end of the pawl, respectively. The return spring is tensioned between the guide assembly and the connecting end of the pawl. When the drive shaft of electrical equipment 2 drives the crank arm to rotate to pull the drive line, the limiting pawl extends into the ratchet groove, allowing the ratchet and the drive shaft of electrical equipment 1 to rotate only in one direction. When the drive shaft of electrical equipment 2 drives the crank arm to rotate in the opposite direction, the limiting pawl opens from the ratchet groove, allowing the ratchet and the drive shaft of electrical equipment 1 to rotate clockwise or counterclockwise.

[0005] Preferably, the transmission line passes through the middle of the return spring.

[0006] Preferably, the guide assembly includes a fixed platform one and a fixed platform two that are fixedly installed. The fixed platform one has a through hole one, and the fixed platform two has a through hole two.

[0007] Preferably, the guide assembly further includes an outer tube, the middle of which is a through channel, and the two ends of the through channel are connected to through hole one and through hole two, respectively. The wire threading channel consists of through hole one, the through channel and through hole two.

[0008] Preferably, it further includes a limiting block fixedly disposed between the pawl and the ratchet, the limiting block defining the extreme position of the limiting pawl rotating in the direction of the ratchet.

[0009] Compared with existing technologies, this invention has the following beneficial technical effects: This invention can be perfectly integrated with electrical interlocking, providing a mechanical interlock applicable to high-voltage electrical equipment, thereby achieving double interlocking, reducing the risk of misoperation, and improving equipment and personal safety. When the second drive shaft of the electrical equipment drives the crank arm to rotate to pull the transmission line, the limiting pawl extends into the ratchet groove, mechanically interlocking the second drive shaft and the first drive shaft, allowing the first drive shaft to rotate only in one direction. When the second drive shaft drives the crank arm in reverse, the limiting pawl disengages from the ratchet groove, releasing the mechanical interlock between the second and first drive shafts, allowing the first drive shaft to rotate clockwise or counterclockwise. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of electrical equipment one and electrical equipment two when they are interlocked in this invention; Figure 2 This is a schematic diagram of the structure of electrical equipment 1 and electrical equipment 2 in this invention when they are not interlocked.

[0011] Reference numerals in the attached diagram: 1. Transmission line; 11. Outer tube; 2. Fixed platform one; 3. Return spring; 4. Pawl; 5. Limit block; 6. Transmission shaft of electrical equipment one; 7. Ratchet; 8. Crank arm; 9. Transmission shaft of electrical equipment two; 10. Fixed platform two. Detailed Implementation

[0012] like Figure 1 and Figure 2 As shown in the figure, this embodiment proposes a mechanical interlocking device for high-voltage electrical equipment, used to interlock or de-interlock the drive shaft 6 of electrical equipment one and the drive shaft 9 of electrical equipment two, including a drive line 1, a return spring 3, a pawl 4, a limit block 5, a ratchet 7, a crank arm 8 and a guide assembly.

[0013] The guiding assembly includes an outer tube 11 and two fixed platforms 10, which are fixedly installed in the electrical equipment. The fixed platforms 11 and 10 remain in their fixed positions. Fixed platform 12 is located on one side of the drive shaft 6 of the electrical equipment and has a through hole 1. Fixed platform 10 is located on one side of the drive shaft 9 of the electrical equipment and has a through hole 2. The outer tube 11 can be designed with different bending forms according to actual needs to define the direction of the transmission line 1. The middle part of the outer tube 11 is a through channel, and both ends of the through channel are connected to through hole 1 and through hole 2 respectively. The through hole 1, the through channel, and through hole 2 form a wire-passing channel.

[0014] The crank arm 8 is mounted on the second transmission shaft 9 of the electrical equipment. When the second transmission shaft 9 of the electrical equipment rotates, it will drive the crank arm 8 to rotate.

[0015] The pawl 4 rotates in a fixed position, that is, it is rotatably installed in a fixed position in the electrical equipment. One end of the pawl 4 is the connecting end, and the other end of the pawl 4 is the limiting pawl.

[0016] The ratchet 7 is mounted on the drive shaft 6 of the electrical equipment. The ratchet 7 has multiple evenly distributed ratchet grooves on its outer circumference, and the ratchet grooves are inclined to the side that gradually tilts counterclockwise away from the central axis.

[0017] The reset spring 3 is tensioned between the guide assembly and the connecting end of the pawl 4, specifically tensioned between the fixed platform 2 and the connecting end of the pawl 4, without obstructing the through hole 1 on the fixed platform 2.

[0018] The transmission line 1 passes through the cable channel, and its two ends are connected to the outer end of the crank arm 8 and the connecting end of the pawl 4, respectively. Most of the transmission line 1 is effectively shielded and protected. The transmission line 1 can be made of steel wire rope. Specifically, both the crank arm 8 and the pawl 4 are provided with connecting holes, and the two ends of the transmission line 1 are connected to the two connecting holes, respectively. The transmission line 1 passes through the middle of the return spring 3, resulting in a compact structure.

[0019] like Figure 1 As shown, when the transmission shaft 9 of the electrical equipment drives the crank arm 8 to rotate counterclockwise, it can drive the pawl 4 to move clockwise through the transmission line 1 and compress the reset spring 3. The limiting pawl of the pawl 4 extends into the ratchet groove to prevent the ratchet 7 from rotating counterclockwise, thus achieving one-way locking.

[0020] like Figure 2 As shown, when the transmission shaft 9 of the electrical equipment drives the crank arm 8 to rotate clockwise, the reset spring 3 extends, pushing the pawl 4 to rotate counterclockwise, and the limit pawl part rotates out from the inside of the ratchet groove, releasing the one-way lock on the ratchet 7.

[0021] The limiting block 5 is fixedly installed in the electrical equipment, located between the pawl 4 and the ratchet 7. The limiting block 5 limits the extreme position of the limiting pawl part in the direction of the ratchet 7. When the limiting pawl part of the pawl 4 rotates clockwise to contact the limiting block 5, the limiting pawl part rotates to the correct position, that is, it extends into the ratchet groove of the ratchet 7.

[0022] This embodiment can be perfectly integrated with electrical interlocking, providing a mechanical interlock applicable to high-voltage electrical equipment, thus achieving double interlocking, reducing the risk of misoperation, and improving the safety of equipment and personnel. When the second drive shaft 9 of the electrical equipment drives the crank arm 8 to rotate and pull the transmission line 1, the limiting pawl extends into the ratchet groove, mechanically interlocking the second drive shaft 9 and the first drive shaft 6 of the electrical equipment. The ratchet 7 and the first drive shaft 6 of the electrical equipment can only rotate in one direction. When the second drive shaft 9 of the electrical equipment drives the crank arm 8 in reverse, the return spring 3 extends to the return state and pushes the connecting end of the ratchet 4. The ratchet 4 pulls the transmission line 1, and the limiting pawl rotates out of the ratchet groove, releasing the mechanical interlock between the second drive shaft 9 and the first drive shaft 6 of the electrical equipment. The ratchet 7 and the first drive shaft 6 of the electrical equipment can then rotate clockwise or counterclockwise.

[0023] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A mechanical interlocking device for high-voltage electrical equipment, characterized in that, For interlocking or de-interlocking the drive shaft (6) of electrical equipment one and the drive shaft (9) of electrical equipment two, including: Guide components with threading channels; The crank arm (8) is mounted on the second drive shaft (9) of the electrical equipment; The pawl (4) rotates in a fixed position in the middle, with one end being the connecting end and the other end being the limiting pawl. The ratchet (7) is mounted on the drive shaft (6) of the electrical equipment and has multiple evenly distributed ratchet grooves on its outer periphery; The transmission line (1) passes through the wire channel and is connected at both ends to the outer end of the crank arm (8) and the connecting end of the pawl (4); The return spring (3) is tensioned between the guide assembly and the pawl (4) connection end; When the second drive shaft (9) of the electrical equipment drives the crank arm (8) to rotate to pull the transmission line (1), the limiting pawl extends into the ratchet groove, and the ratchet (7) and the first drive shaft (6) of the electrical equipment can only rotate in one direction. When the second drive shaft (9) of the electrical equipment drives the crank arm (8) to reverse, the limiting pawl opens from the ratchet groove, and the ratchet (7) and the first drive shaft (6) of the electrical equipment can rotate clockwise or counterclockwise.

2. The mechanical interlocking device for high-voltage electrical equipment according to claim 1, characterized in that, The transmission line (1) passes through the middle of the return spring (3).

3. The mechanical interlocking device for high-voltage electrical equipment according to claim 1, characterized in that, The guide assembly includes a fixed platform one (2) and a fixed platform two (10) that are fixedly installed. The fixed platform one (2) has a through hole one, and the fixed platform two (10) has a through hole two.

4. A mechanical interlocking device for high-voltage electrical equipment according to claim 3, characterized in that, The guide assembly also includes an outer tube (11), the middle of which is a through channel. The two ends of the through channel are connected to through hole one and through hole two respectively. The wire threading channel consists of through hole one, through channel and through hole two.

5. A mechanical interlocking device for high-voltage electrical equipment according to claim 1, characterized in that, It also includes a limiting block (5) fixedly set between the pawl (4) and the ratchet (7), the limiting block (5) limiting the extreme position of the limiting pawl in the direction of the ratchet (7).

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