CN218384977U - Locking device of high-voltage vacuum circuit breaker - Google Patents

Abstract

The utility model relates to a vacuum circuit breaker technical field especially relates to a high-pressure vacuum circuit breaker locking device. The method comprises the following steps: the main shaft, the interlocking shaft and the locking structure are isolated; the locking structure comprises a locking rod, a locking groove, a positioning groove and a spring; the locking rod is arranged between the locking groove and the positioning groove; the spring can drive the locking rod to extend into the locking groove; the locking grooves are arranged in a step shape; the locking groove is formed in the isolation main shaft; when the isolating main shaft rotates, the locking groove can be driven to move relative to the locking rod, so that the locking rod extends into or is separated from the positioning groove; the positioning groove is arranged on the interlocking shaft; when the linkage shaft rotates, the positioning groove can be driven to move relative to the locking rod. In the prior art, the operation sequence of the isolation disconnecting link and the breaker cannot be strictly limited. Compared with the prior art, the utility model discloses can strictly restrict the operation order of isolation switch and circuit breaker to the effectual incident of having avoided leading to because of operating personnel maloperation has effectually improved the operational safety nature.

Description

Locking device of high-voltage vacuum circuit breaker

Technical Field

The utility model relates to a vacuum circuit breaker technical field especially relates to a high-pressure vacuum circuit breaker locking device.

Background

The high-voltage vacuum circuit breaker is named because arc extinguishing media of the high-voltage vacuum circuit breaker and insulating media of contact gaps after arc extinguishing are high vacuum; the arc extinguishing device has the advantages of small volume, light weight, suitability for frequent operation and no need of maintenance for arc extinguishing, and is popularized to be applied to a power distribution network. Due to the requirement of ensuring the safety of operators and equipment, an isolation disconnecting link and a common breaker are also arranged in the high-voltage vacuum circuit breaker. When the high-voltage vacuum circuit breaker is required to be opened, the circuit breaker is required to be operated firstly, and then the isolation disconnecting link is required to be operated. When the high-voltage vacuum circuit breaker needs to be operated to switch on, the isolation knife switch needs to be operated firstly to switch on, and then the circuit breaker needs to be operated to switch on. It can be seen that the order of operations differs for different operations. In order to avoid safety accidents caused by misoperation, a corresponding locking device is required to be additionally arranged in the high-voltage vacuum circuit breaker so as to limit the operation sequence, thereby improving the safety.

Chinese patent discloses a high-pressure vacuum circuit breaker interlocking structure [ application No.: CN201620702308.5, publication No.: CN205692752U includes: the baffle is suitable for being fixed on an isolation main shaft for operating the isolation disconnecting link switching-on and switching-off, and is provided with a locking hole; the driving plate is arranged on the base, is suitable for being linked with the breaker and can move to a first position when the breaker is in a closing state and move to a second position when the breaker is in an opening state; the connecting rod is arranged on the base through the guide structure and can move back and forth along the axial direction of the connecting rod; the elastic structure is arranged between the connecting rod and the driving plate; when the isolation main shaft is operated to enable the isolation disconnecting link to be in a switching-on state, the baffle plate moves to a switching-on position, and when the breaker is operated to switch on, the driving plate moves to the first position and pushes the connecting rod to move towards the baffle plate through the elastic structure; when the locking hole is aligned with the connecting rod, the driving plate pushes the connecting rod to pass through the locking hole through an elastic structure to realize locking; when the locking hole is not aligned with the connecting rod, the driving plate pushes the connecting rod to be contacted with the baffle plate through the elastic structure, and the elastic structure deforms to store energy. Although the technical scheme of this patent provides a locking structure, in the technical scheme of this patent, in order to prevent that the baffle from damaging for under the breaker can not normally be with the isolation switch locking the condition, still can normally close a floodgate, destroyed the requirement of safe operation to the operation order, this just brings the potential safety hazard for follow-up separating brake operation.

SUMMERY OF THE UTILITY MODEL

To the technical problem of prior art, the utility model provides a high-pressure vacuum circuit breaker locking device.

In order to solve the technical problem, the utility model provides a following technical scheme:

a high voltage vacuum circuit breaker lockout device comprising: the main shaft, the interlocking shaft and the locking structure are isolated; the locking structure comprises a locking rod, a locking groove, a positioning groove and a spring; the locking rod is arranged between the locking groove and the positioning groove; the spring can drive the locking rod to extend into the locking groove; the locking grooves are arranged in a step shape; the locking groove is formed in the isolation main shaft; when the isolating main shaft rotates, the locking groove can be driven to move relative to the locking rod, so that the locking rod extends into or is separated from the positioning groove; the positioning groove is arranged on the interlocking shaft; when the linkage shaft rotates, the positioning groove can be driven to move relative to the locking rod.

In an actual state, when the high-voltage vacuum circuit breaker is in a switching-off state, one end of the locking rod extends into the locking groove under the pushing of the spring, and the other end of the locking rod extends into the positioning groove. At this time, the lock shaft is locked by the lock lever and cannot rotate. When the high-voltage vacuum circuit breaker needs to be switched from opening to closing, the isolation disconnecting link needs to be switched on first, namely, the isolation main shaft is rotated to enter a switching-on position. When the isolation main shaft rotates, the locking groove is driven to move relative to the locking rod, the locking groove is arranged in a ladder shape, and when the locking groove moves to a specified position, the locking rod moves relative to the positioning groove under the pushing of the spring, so that the locking rod is separated from the positioning groove. Therefore, the isolation knife switch completes closing, and the interlocking shaft can rotate. And rotating the linkage shaft to enable the linkage shaft to rotate to a specified state, so that the circuit breaker completes switching on. Thus, the closing of the high-voltage vacuum circuit breaker is completed. When the linkage shaft rotates, the positioning groove is driven to rotate relative to the locking rod. When the high-voltage vacuum circuit breaker is required to be switched from closing to opening. Because of the constant head tank no longer is in the position corresponding with the locking lever, then the locking lever produces conflict with the interlock axle for the locking lever can not move for the interlock axle, and locking lever is reverse to spacing the locking groove, makes the main shaft of keeping apart can not drive the motion of locking groove promptly. Therefore, the interlocking shaft can only be operated to rotate firstly, namely, the breaker is operated to open the brake firstly. When the interlocking shaft rotates to a designated state, the positioning groove rotates to a position corresponding to the locking rod again. At this time, the isolation main shaft can be rotated reversely, so that the locking groove moves reversely, and the locking rod extends into the positioning groove again. Thereby completing the opening of the isolation switch. Thereby, the opening operation of the high voltage vacuum circuit breaker is completed. To sum up, the utility model discloses a locking structure has strictly restricted the action order of keeping apart main shaft, interlock axle to the effectual security that improves the operation.

Furthermore, the locking structure also comprises a fixed plate and a movable plate; the locking rod penetrates through the fixing plate; a locking lever movable relative to the fixing plate; the locking rod is fixedly connected with the movable plate; the spring is arranged between the fixed plate and the movable plate.

Furthermore, a baffle is fixedly arranged on the isolation main shaft; the locking groove is arranged on the baffle.

Furthermore, the locking groove comprises a sliding groove and a limiting groove; the sliding groove is communicated with the limiting groove; the depth of the limiting groove is larger than that of the sliding groove.

Furthermore, a limiting groove is formed in the baffle; the sliding groove is arc-shaped; the chute has a baffle extending to one side of the baffle.

Furthermore, one end of the locking rod, which extends into the locking groove, is provided with a guide inclined plane; the locking groove corresponds to the guide slope.

Furthermore, the locking rod is also provided with a smooth surface; the smooth surface intersects the guide slope.

Drawings

FIG. 1: the whole structure of the opening state.

FIG. 2 is a schematic diagram: and (4) a whole structure diagram of a closing state.

FIG. 3: locking groove structure chart.

FIG. 4: locking lever end structure diagram.

In the figure: 1. isolating the main shaft; 11. a baffle plate; 111. a through hole; 2. a linking shaft; 21. a connecting rod; 22. a drive plate; 23. a drive key; 221. a transmission groove; 211. a limiting plate; 3. a locking structure; 31. a locking lever; 32. a locking groove; 33. positioning a groove; 34. a spring; 35. a fixing plate; 36. a movable plate; 321. a chute; 322. a limiting groove; 311. a guide ramp; 312. And (7) smoothing the surface.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

A high voltage vacuum circuit breaker lockout device comprising: the device comprises an isolation main shaft 1, a linkage shaft 2 and a locking structure 3. The high-voltage vacuum circuit breaker is generally provided with two parts, namely an isolation disconnecting link and a common circuit breaker (hereinafter referred to as a circuit breaker). The isolating main shaft 1 is a part of an isolating disconnecting link. When the disconnecting link needs to be disconnected or switched on, the disconnecting link needs to be disconnected or switched on by rotating the isolating main shaft 1. The isolation main shaft 1 is fixedly provided with a baffle plate 11. When the isolation spindle 1 rotates, the baffle 11 rotates about the isolation spindle 1. The baffle 11 is further provided with a through hole 111.

The interlock shaft 2 is part of the circuit breaker. When the breaker needs to be switched on or switched off, the breaker needs to be switched on or switched off by rotating the linkage shaft 2. The connecting rod 21, the transmission plate 22 and the transmission key 23 are arranged on the connecting shaft 2. The transmission plate 22 is fixedly provided on the interlocking shaft 2. When the interlocking shaft 2 rotates, the transmission plate 22 can rotate about the interlocking shaft 2. The driving plate 22 is provided with a driving groove 221. One end of the connecting rod 21 is fixedly connected with the transmission key 23. The connecting rod 21 is provided with a limiting plate 211, and the limiting plate 211 is fixedly connected with other parts of the high-voltage vacuum circuit breaker. Under the limiting action of the limiting plate 211, the connecting rod 21 can slide along a fixed direction. Meanwhile, the driving key 23 slidably extends into the driving groove 221. When the link shaft 2 drives the transmission groove 221 to move through the transmission plate 22, the transmission groove 221 can shift the transmission key 23, so as to drive the connecting rod 21 to move through the transmission key 23.

The locking structure 3 includes a locking lever 31, a locking groove 32, a positioning groove 33, a spring 34, a fixed plate 35, and a movable plate 36. The locking groove 32 includes a sliding groove 321 and a limiting groove 322. The sliding slot 321 is arc-shaped. The sliding groove 321 is disposed on the baffle plate 11, and the sliding groove 321 extends from the baffle plate 11 to one side of the baffle plate 11. The limiting groove 322 is formed in the baffle 11. The limiting groove 322 is communicated with the sliding groove 321. The depth of the limiting groove 322 is greater than that of the sliding groove 321, so that the locking groove 32 is stepped. When the baffle 11 moves under the driving of the isolation spindle 1, the baffle 11 can drive the locking groove 32 to move synchronously. The positioning groove 33 is opened on the interlocking shaft 2. When the interlocking shaft 2 rotates, the positioning groove 33 can be synchronously driven to move. The locking lever 31 is disposed between the locking groove 32 and the positioning groove 33. One end of the locking lever 31 corresponds to the locking groove 32, and the other end corresponds to the positioning groove 33. The locking lever 31 has a guide inclined surface 311 and a smooth surface 312 at one end corresponding to the locking groove 32, and the smooth surface 312 intersects with the guide inclined surface 311. Correspondingly, the shape of the stopper groove 322 corresponds to the shape of the end of the locking lever 31. Under the action of the guiding inclined surface 311, the end of the locking lever 31 can smoothly slide into the sliding groove 321 from the limiting groove 322. When the locking lever 31 slides into the slide groove 321, the smooth surface 312 abuts against the bottom surface of the slide groove 321. Therefore, the contact area between the locking rod 31 and the sliding groove 321 is increased through the smooth surface 312, so that the locking rod 31 is prevented from scratching the sliding groove 321 when the locking rod 31 and the sliding groove 321 move relatively, and otherwise, the sliding groove 321 is prevented from causing uncontrollable deformation of the end part of the locking rod 31. Meanwhile, the locking lever 31 penetrates the fixing plate 35, and the locking lever 31 is movable relative to the fixing plate 35. The fixed plate 35 is fixedly connected with other parts of the high-voltage vacuum circuit breaker. The locking bar 31 is also fixedly connected to the movable plate 36. The spring 34 is disposed between the fixed plate 35 and the movable plate 36, and thus, an elastic force can be applied to the locking lever 31 through the movable plate 36, so that the locking lever 31 can maintain a state of being protruded into the locking groove 32.

In an actual state, when the high voltage vacuum circuit breaker is in an open state. The isolation disconnecting link is in an opening state, and the breaker is in an opening state. As shown in the drawings, one end of the locking lever 31 is located in the slide groove 321, and the other end is embedded in the positioning groove 33. At this time, the locking lever 31 locks the interlock shaft 2 of the circuit breaker so that the interlock shaft 2 cannot rotate.

When the high-voltage vacuum circuit breaker is required to be switched from an opening state to a closing state. Since the lock lever 31 locks the interlocking shaft 2, the interlocking shaft 2 cannot rotate. At this time, the isolation knife switch can only be operated to be switched on first, that is, the isolation spindle 1 is operated to rotate first. When the isolation spindle 1 rotates, the isolation spindle 1 will drive the baffle plate 11 to rotate, and then drive the sliding chute 321 to move relative to the locking rod 31 through the baffle plate 11. The spacing groove 322 is continuously close to the locking rod 31 along with the rotation of the isolation spindle 1, when the spacing groove 322 moves to a position corresponding to the locking rod 31, the isolation spindle 1 rotates to a specified position, and the isolation disconnecting link completes the closing operation. At this time, the through hole 111 on the shutter 11 moves to a position corresponding to the link 21. Meanwhile, under the thrust action of the spring 34, the end of the locking rod 31 extends into the limiting groove 322. At this point, the operator can hear a distinct "click" indicating that the isolation spindle 1 is rotated into position. Because the depth of the limiting groove 322 is greater than the depth of the sliding groove 321, when the locking rod 31 extends into the limiting groove 322, the locking rod 31 will displace to a certain extent, so that the other end of the locking rod 31 is separated from the positioning groove 33, thereby completing unlocking of the interlocking shaft 2. Thus, the breaker can be operated to be closed, that is, the interlocking shaft 2 is operated to rotate. When the interlocking shaft 2 rotates, the interlocking shaft 2 drives the connecting rod 21 to slide through the matching of the transmission plate 22 and the transmission key 23. When the link shaft 2 rotates to a designated position, that is, the circuit breaker completes closing, the link rod 21 passes through the through hole 111 of the blocking plate 11. Thereby, the spacer spindle 1 is locked by the link 21. Meanwhile, during the rotation of the interlocking shaft 2, the interlocking shaft 2 will drive the positioning groove 33 to move relative to the locking lever 31. At this time, the positioning groove 33 no longer corresponds to the locking lever 31, so that the locking lever 31 abuts against the outer edge of the interlocking shaft 2. Therefore, the operation of switching the high-voltage vacuum circuit breaker from opening to closing is completed.

When the high-voltage vacuum circuit breaker needs to be converted from a closing state to an opening state. Since the locking lever 31 abuts the outer edge of the interlocking shaft 2, the locking lever 31 cannot extend into the positioning groove 33, that is, the locking lever 31 cannot move relative to the interlocking shaft 2. Therefore, the locking rod 31 cannot slide into the sliding groove 321 from the limiting groove 322, and the locking rod 31 locks the isolation spindle 1. At the same time, the link 21 passes through the baffle 11 through the through hole 111, and therefore, the link 21 also locks the isolation spindle 1. Therefore, the breaker can only be operated to open the brake first, i.e. the interlocking shaft 2 is operated to rotate reversely first. When the interlocking shaft 2 rotates reversely, the interlocking shaft 2 drives the connecting rod 21 to move through the cooperation of the transmission plate 22 and the transmission key 23, so that the connecting rod 21 is separated from the baffle 11. At the same time, the interlocking shaft 2 will synchronously bring the detent 33 into movement relative to the locking lever 31. When the positioning groove 33 moves to a position corresponding to the locking lever 31, the interlocking shaft 2 rotates to a designated position, and the opening operation of the circuit breaker is completed. At this time, the link 21 is disengaged from the shutter 11. The positioning groove 33 corresponds to the locking lever 31, and the locking lever 31 is movable relative to the interlocking shaft 2 so as to protrude into the positioning groove 33. I.e. the isolating main shaft 1 is unlocked. Therefore, the isolation disconnecting link can be operated to be disconnected, namely, the isolation main shaft 1 can be rotated. When the isolation spindle 1 rotates reversely, the isolation spindle 1 drives the locking groove 32 to move reversely. During the movement of the locking groove 32, the locking rod 31 will slide into the sliding groove 321 from the limiting groove 322 under the action of the guiding inclined surface 311. Because the depth of the sliding groove 321 is less than the depth of the limiting groove 322. The locking lever 31 is pushed so that the other end of the locking lever 31 extends into the positioning groove 33, completing the locking of the interlocking shaft 2. And continuing to rotate the isolation main shaft 1 until the isolation main shaft 1 rotates to a specified position. At this time, the opening of the isolation switch is completed. Thus, the opening of the high-voltage vacuum circuit breaker is completed.

To sum up the utility model discloses a locking structure 3 has carried out the strict limit to the operation order of keeping apart main shaft 1, interlocking axle 2. When the high-voltage vacuum circuit breaker needs to be switched on, the isolation knife switch can be operated firstly to be switched on, and then the circuit breaker is operated to be switched on. When the high-voltage vacuum circuit breaker is required to be opened, the circuit breaker is only operated to be opened first, and the isolation disconnecting link is operated to be opened. Therefore, the operation safety is effectively improved. On the other hand, the utility model discloses make only at the accurate motion to the assigned position of isolation main shaft 1 or interlock axle 2 for when locking structure 3 can correctly carry out aforementioned motion process, just can carry out subsequent operation. Therefore, the operation of an operator is in place during actual operation, the misoperation of the high-voltage vacuum circuit breaker caused by the fact that the operator is not in place is avoided, and the safety is further improved.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (7)

1. A high-voltage vacuum circuit breaker locking device is characterized in that: the method comprises the following steps: the device comprises an isolation main shaft (1), a linkage shaft (2) and a locking structure (3);

the locking structure (3) comprises a locking rod (31), a locking groove (32), a positioning groove (33) and a spring (34);

the locking lever (31) is disposed between the locking groove (32) and the positioning groove (33);

the spring (34) can drive the locking rod (31) to extend into the locking groove (32);

the locking grooves (32) are arranged in a step shape;

the locking groove (32) is formed in the isolation main shaft (1);

when the isolating main shaft (1) rotates, the locking groove (32) can be driven to move relative to the locking rod (31), so that the locking rod (31) extends into or is separated from the positioning groove (33);

the positioning groove (33) is formed in the linkage shaft (2);

when the interlocking shaft (2) rotates, the positioning groove (33) can be driven to move relative to the locking rod (31).

2. The locking device of a high voltage vacuum circuit breaker according to claim 1, characterized in that: the locking structure (3) further comprises a fixed plate (35) and a movable plate (36);

the locking rod (31) penetrates through the fixing plate (35);

the locking lever (31) being movable relative to the fixing plate (35);

the locking rod (31) is fixedly connected with the movable plate (36);

the spring (34) is disposed between the fixed plate (35) and the movable plate (36).

3. A high voltage vacuum interrupter locking device according to claim 1, characterized in that: a baffle (11) is fixedly arranged on the isolation main shaft (1);

the locking groove (32) is formed in the baffle plate (11).

4. A locking device for a high voltage vacuum circuit breaker according to claim 3, characterized in that: the locking groove (32) comprises a sliding groove (321) and a limiting groove (322);

the sliding groove (321) is communicated with the limiting groove (322);

the depth of the limiting groove (322) is larger than that of the sliding groove (321).

5. The locking device of claim 4, wherein: the limiting groove (322) is formed in the baffle (11);

the sliding groove (321) is arc-shaped;

the sliding groove (321) is provided with the baffle plate (11) extending towards one side of the baffle plate (11).

6. A high voltage vacuum interrupter locking device according to claim 1, characterized in that: one end of the locking rod (31) extending into the locking groove (32) is provided with a guide inclined surface (311);

the locking groove (32) corresponds to the guide slope (311).

7. The locking device of a high voltage vacuum circuit breaker according to claim 6, characterized in that: the locking rod (31) is also provided with a smooth surface (312);

the smooth surface (312) intersects the guide slope (311).

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