CN110571091B - Interlocking mechanism of ZW32 type pole-mounted switch isolating knife and switch mechanism - Google Patents

Abstract

The interlocking mechanism of the isolating knife of the ZW32 type pole-mounted switch and the switch mechanism of the present invention comprises a mechanism interlocking plate, a limit shaft, a transmission connecting plate, a main shaft crank arm, and a shaft sleeve. The mechanism interlocking plate is fixedly connected to the mechanism closing shaft and rotates synchronously with the mechanism closing shaft. The lower part of the main shaft crank arm is fixedly connected to the isolating knife switch main shaft. The upper part of the main shaft crank arm is hinged to one end of the transmission connecting plate. The other end of the transmission connecting plate is hinged to the right end of the limit shaft. The left end of the limit shaft can extend to the left to be clamped with the mechanism interlocking plate. The shaft sleeve is sleeved on the outer surface of the limit shaft and is fixedly connected to the circuit breaker housing. The interlocking mechanism of the isolating knife closing of the pole-mounted switch and the switch mechanism of the present invention has a simple structure. When the isolating knife switch is not closed in place, the rotation of the circuit breaker closing shaft can be limited, thereby avoiding the occurrence of a switch burning accident caused by the isolating knife switch not being closed in place and the circuit breaker continuing to be closed.

Description

Interlocking mechanism between the isolating knife and the switch mechanism of ZW32 type column switch

Technical Field

The invention relates to the field of electric power equipment, and in particular to a column switch interlocking mechanism.

Background technique

At present, the ZW32 pole-mounted switches on the market all have the problem of inaccurate and unstable mechanical interlocking between the isolating knife and the circuit breaker. During the long-term outdoor use of the isolating knife switch, there is a problem of inadequate manual opening and closing due to the failure of lubrication of the transmission parts and the increase of opening and closing resistance. Since the switch is suspended at a high position on the pole tower, it is difficult for the operator to find the problem in time, causing the switch to burn out after power is supplied, affecting the power supply of the grid users.

In order to prevent the isolation knife switch from being opened and closed in place, the ZW32 column switch interlocking mechanism is currently used. The existing ZW32 column switch interlocking mechanism includes an interlocking rod, an isolation knife switch spindle, an isolation knife switch spindle limit plate, a switch spindle, and an isolation interlocking shaft. When the column switch is closed, the switch spindle in the switch box moves to the left, driving the isolation interlocking shaft to rotate, causing the interlocking rod to move to the left and extend out of the isolation knife bracket, thereby jamming the isolation knife switch spindle limit plate, thereby limiting the operation of the isolation knife.

Although the pole-mounted switch of this structure has the function of locking the isolating knife switch operation when the switch is closed, it lacks the protection measure of locking the switch when the isolating knife switch is not closed in place.

Summary of the invention

The technical problem to be solved by the present invention is to provide an interlocking mechanism between a ZW32 type column mounted switch isolating knife and a switch mechanism, which has a simple structure and can limit the rotation of the closing shaft of the circuit breaker mechanism when the isolating knife switch is not closed in place, thereby avoiding the switch burning accident caused by the isolating knife switch not being closed in place and the circuit breaker continuing to be closed.

The interlocking mechanism of the ZW32 type column switch isolating knife and the switch mechanism of the present invention comprises a mechanism interlocking plate, a limit shaft, a transmission connecting plate, a main shaft crank arm and a shaft sleeve. The mechanism interlocking plate is fixedly connected to the mechanism closing shaft and rotates synchronously with the mechanism closing shaft. The lower part of the main shaft crank arm is fixedly connected to the main shaft of the isolating knife switch. The upper part of the main shaft crank arm is hinged to one end of the transmission connecting plate, and the other end of the transmission connecting plate is hinged to the right end of the limit shaft. The left end of the limit shaft can extend to the left and be clamped with the mechanism interlocking plate. The shaft sleeve is sleeved on the outer surface of the limit shaft and is fixedly connected to the circuit breaker housing.

The present invention discloses an interlocking mechanism for a ZW32 type column mounted switch isolating knife and a switch mechanism, wherein there are two transmission link plates, and the right end of the limit shaft is located between the two transmission link plates and is hinged by a first pin shaft.

The interlocking mechanism of the ZW32 type column switch isolating knife and the switch mechanism of the present invention, wherein the upper part of the main shaft crank arm is hinged to the transmission link plate through a second pin shaft.

The interlocking mechanism of the ZW32 type column mounted switch isolating knife and the switch mechanism of the present invention, wherein the limit axis is arranged horizontally.

The interlocking mechanism of the ZW32 type column switch isolating knife and the switch mechanism of the present invention, wherein the outer surface of the limit shaft is sleeved with a plurality of sealing rings, and the sealing rings are located between the shaft sleeve and the limit shaft.

The interlocking mechanism of the isolating knife of the ZW32 type column mounted switch and the switch mechanism of the present invention, wherein a sealing gasket is arranged between the shaft sleeve and the circuit breaker housing.

The present invention discloses an interlocking mechanism between a ZW32 type column mounted switch isolating knife and a switch mechanism, wherein the mechanism interlocking plate is a plate with a rectangular cross section, the main shaft crank arm is a cam, a mounting hole is provided at the lower portion of the main shaft crank arm, the isolating knife switch main shaft passes through the mounting hole and is welded and fixed to the main shaft crank arm.

The invention discloses an interlocking mechanism between a ZW32 type column mounted switch isolating knife and a switch mechanism, wherein a groove is arranged on the interlocking plate of the mechanism, and the left end of the limit shaft can extend into the groove.

The present invention discloses an interlocking mechanism between a ZW32 type column mounted switch isolating knife and a switch mechanism, wherein the left end portion of the limit shaft is blocked in the rotation direction of the mechanism interlocking plate.

The present invention discloses an interlocking mechanism between a ZW32 type column mounted switch isolating knife and a switch mechanism, wherein the left end portion of the limit shaft is located behind the mechanism interlocking plate.

The interlocking mechanism of the isolating knife of the ZW32 type column switch and the switch mechanism of the present invention is different from the prior art in that the interlocking mechanism of the isolating knife of the ZW32 type column switch and the switch mechanism of the present invention performs mechanism interlocking by converting the rotation of the isolating knife switch main shaft into the lateral linear motion of the limit shaft when the isolating knife is opened and closed, and includes a mechanism interlocking plate, a limit shaft, a transmission connecting plate, a main shaft crank arm, and a shaft sleeve. The mechanism interlocking plate is fixedly connected to the mechanism closing shaft and rotates synchronously with the mechanism closing shaft. The lower part of the main shaft crank arm is fixedly connected to the isolating knife switch main shaft. The upper part of the main shaft crank arm is hinged to one end of the transmission connecting plate, and the other end of the transmission connecting plate is hinged to the right end of the limit shaft. The left end of the limit shaft can extend to the left and be clamped with the mechanism interlocking plate. The shaft sleeve is sleeved on The outer surface of the limit shaft is fixedly connected to the circuit breaker housing and has a simple structure. When the isolating knife is closed, the main shaft crank arm rotates clockwise. After the isolating knife is closed, the limit shaft is separated from the movement track of the mechanism interlocking plate. The limit shaft is not in the movement direction of the mechanism interlocking plate, and the interlocking is released. When the isolating knife is not closed in place, the rotation angle of the isolating knife main shaft becomes smaller, and the limit shaft moves to the right but fails to separate from the movement track of the mechanism interlocking plate. Therefore, when the switch mechanism is closed, the movement direction of the mechanism interlocking plate is stuck by the limit shaft, and the mechanism interlocking plate is fixedly connected to the mechanism closing shaft. Therefore, the mechanism closing shaft cannot continue to rotate, and the circuit breaker mechanism is prohibited from moving and cannot continue to close, thereby avoiding the switch burning accident caused by closing the circuit breaker when the isolating knife is not closed in place.

The interlocking mechanism of the pole-mounted switch disconnector closing and switch mechanism of the present invention is further described below in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the front view of the interlocking mechanism of the isolating knife and the switch mechanism of the ZW32 type column switch of the present invention;

2 is a right side structural schematic diagram of the interlocking mechanism of the ZW32 type column mounted switch isolating knife and the switch mechanism of the present invention;

3 is a diagram showing the use state of the interlocking mechanism of the isolating knife and the switch mechanism of the ZW32 type column switch of the present invention (the isolating knife is in a semi-closed state);

4 is a diagram showing the use status of the interlocking mechanism of the isolating knife and the switch mechanism of the ZW32 type column switch of the present invention (the isolating knife is in the closed state).

Detailed ways

As shown in Figures 1 and 2, the interlocking mechanism of the ZW32 type column switch isolating knife and the switch mechanism of the present invention includes a mechanism interlocking plate 1, a limit shaft 2, a transmission connecting plate 3, a main shaft crank arm 4, and a sleeve 5. The mechanism interlocking plate 1 is fixedly connected to the mechanism closing shaft 10 and rotates synchronously with the mechanism closing shaft 10. The lower part of the main shaft crank arm 4 is fixedly connected to the isolating knife switch main shaft 11. The upper part of the main shaft crank arm 4 is hinged to one end of the transmission connecting plate 3, and the other end of the transmission connecting plate 3 is hinged to the right end of the limit shaft 2. The limit shaft 2 is horizontally arranged, and the left end of the limit shaft 2 can extend to the left and be clamped with the mechanism interlocking plate 1. The sleeve 5 is sleeved on the outer surface of the limit shaft 2 and is fixedly connected to the circuit breaker housing 12.

There are two transmission link plates 3. As shown in FIG. 1 , the right end of the limit shaft 2 is located between the two transmission link plates 3 and is hinged through a first pin 6. The upper part of the main shaft crank arm 4 is hinged to the transmission link plate 3 through a second pin 7.

As shown in FIG. 1 , a plurality of sealing rings 8 are sleeved on the outer surface of the limiting shaft 2 . The sealing rings 8 are located between the shaft sleeve 5 and the limiting shaft 2 . A sealing gasket 9 is provided between the shaft sleeve 5 and the circuit breaker housing.

As shown in Figures 1 and 2, the mechanism interlocking plate 1 adopts a plate with a rectangular cross-section, the spindle crank arm 4 adopts a cam, a mounting hole is provided at the lower portion of the spindle crank arm 4, and the isolation knife switch spindle 11 passes through the mounting hole and is welded and fixed to the spindle crank arm 4.

In this embodiment, the clamping mode of the limit shaft 2 and the mechanism interlocking plate 1 is: the left end of the limit shaft 2 is blocked in the rotation direction of the mechanism interlocking plate 1, and the left end of the limit shaft 2 is located behind the mechanism interlocking plate 1. Of course, the clamping mode of the two can also be: a groove is provided on the mechanism interlocking plate 1, and the left end of the limit shaft 2 can extend into the groove.

The installation steps of the interlocking mechanism of the ZW32 type column switch isolating knife and the switch mechanism of the present invention are as follows: after the shaft sleeve 5 is equipped with a sealing gasket 9, it is installed on the corresponding nails and openings of the circuit breaker housing 12, and is fastened to the circuit breaker housing 12 with bolts; the mechanism interlocking plate 1 is installed on the mechanism closing shaft 10, and the position of the mechanism interlocking plate 1 corresponds to that of the shaft sleeve 5; the sealing ring 8 is installed on the outer surface of the limit shaft 2 and then inserted into the shaft sleeve 5, and the right end of the limit shaft 2 is clamped by two transmission connecting plates 3 and connected together by a first pin shaft 6; the other end of the transmission connecting plate 3 is connected to the main shaft crank arm 4 by a second pin shaft 7.

In the ZW32 type column switch (circuit breaker), the opening and closing handle is connected to the mechanism closing shaft 10 in a transmission manner. The closing of the circuit breaker is achieved by driving the opening and closing handle to rotate the mechanism closing shaft 10. The isolating knife switch main shaft 11 is connected to the insulating pull rod 13, and the insulating pull rod 13 is hinged to the isolating blade 14. Operating the isolating blade 14 of the isolating knife switch can drive the insulating pull rod 13 to move, and then drive the isolating knife switch main shaft 11 to rotate. The main shaft crank arm 4 is welded and fixed to the isolating knife switch main shaft 11. Therefore, operating the isolating blade 14 of the isolating knife switch can cause the main shaft crank arm 4 to rotate clockwise.

The interlocking mechanism of the ZW32 type column switch isolating knife and the switch mechanism of the present invention is interlocked by converting the rotation of the isolating knife switch main shaft 11 when the isolating knife is opened and closed into the horizontal linear motion of the limit shaft 2. When the isolating knife is closed, the main shaft crank arm 4 rotates clockwise, as shown in Figure 4, and the limit shaft 2 is separated from the motion track of the mechanism interlocking plate 1 after the closing is in place, and the limit shaft 2 is not in the motion direction of the mechanism interlocking plate 1, and the interlocking is released. As shown in Figure 3, when the isolating knife is not closed in place, the rotation angle of the isolating knife switch main shaft 11 becomes smaller, and the limit shaft 2 moves to the right but fails to separate from the motion track of the mechanism interlocking plate 1, so that when the switch mechanism (circuit breaker) is closed, the action direction of the mechanism interlocking plate 1 is stuck by the limit shaft 2, and the mechanism interlocking plate 1 is fixedly connected to the mechanism closing shaft 10, so the mechanism closing shaft 10 cannot continue to rotate, and the switch mechanism (circuit breaker) is prohibited from moving and cannot continue to close, thereby avoiding the switch burning accident caused by closing the circuit breaker when the isolating knife is not closed in place.

The embodiments described above are merely descriptions of preferred implementation modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims (7)

1. An interlocking mechanism for a ZW32 type column switch isolating knife and a switch mechanism, characterized in that it comprises a mechanism interlocking plate (1), a limit shaft (2), a transmission link plate (3), a main shaft crank arm (4), and a shaft sleeve (5), wherein the mechanism interlocking plate (1) is fixedly connected to the mechanism closing shaft and rotates synchronously with the mechanism closing shaft, the lower part of the main shaft crank arm (4) is fixedly connected to the main shaft of the isolating knife switch, the upper part of the main shaft crank arm (4) is hinged to one end of the transmission link plate (3), the other end of the transmission link plate (3) is hinged to the right end of the limit shaft (2), the left end of the limit shaft (2) can extend to the left to be clamped with the mechanism interlocking plate (1), and the shaft sleeve (5) is sleeved on the outer surface of the limit shaft (2) and is fixedly connected to the circuit breaker housing; There are two transmission link plates (3), and the right end of the limit shaft (2) is located between the two transmission link plates (3) and is hinged via a first pin shaft (6); The upper part of the main shaft crank arm (4) is hinged to the transmission link plate (3) via a second pin shaft (7); The mechanism interlocking plate (1) is a plate with a rectangular cross section, the spindle crank arm (4) is a cam, a mounting hole is provided at the lower part of the spindle crank arm (4), the isolating knife switch spindle passes through the mounting hole and is welded and fixed to the spindle crank arm (4). 2. The interlocking mechanism of the ZW32 type column mounted switch isolating knife and the switch mechanism according to claim 1 is characterized in that: the limit axis (2) is arranged horizontally. 3. The interlocking mechanism of the ZW32 type column switch isolating knife and the switch mechanism according to claim 2 is characterized in that: the outer surface of the limit shaft (2) is sleeved with multiple sealing rings (8), and the sealing rings (8) are located between the sleeve (5) and the limit shaft (2). 4. The interlocking mechanism of the ZW32 type column mounted switch isolating knife and the switch mechanism according to claim 3, characterized in that a sealing gasket (9) is provided between the shaft sleeve (5) and the circuit breaker housing. 5. The interlocking mechanism of the ZW32 type column switch isolating knife and the switch mechanism according to claim 4 is characterized in that: a groove is provided on the mechanism interlocking plate (1), and the left end of the limit shaft (2) can extend into the groove. 6. The interlocking mechanism of the ZW32 type column switch isolating knife and the switch mechanism according to claim 4 is characterized in that the left end of the limit shaft (2) blocks the rotation direction of the mechanism interlocking plate (1). 7. The interlocking mechanism of the ZW32 type column mounted switch isolating knife and the switch mechanism according to claim 6, characterized in that the left end of the limit shaft (2) is located behind the mechanism interlocking plate (1).