CN218123290U - Two-section type interlocking device of electric grounding switch and circuit breaker - Google Patents

Abstract

The utility model discloses a two-stage interlocking device for an electric grounding switch and a circuit breaker, which belongs to the technical field of switch cabinets. Including the operation hole baffle, the operation hole baffle is set in the vertical limit chute inside the cabinet, the upper part of the operation hole baffle is provided with a hollowed out operation window, and also includes the interlocking plate, movable interlocking plate and circuit breaker interlocking plate. The original manual operation interlock structure is retained, and the downward restriction of the toggle operation hole baffle can be lifted by toggling the circuit breaker interlock plate, and the operation hole baffle is manually pressed down to expose the end of the grounding switch operation shaft from the operation window. Realize the closing and opening of the grounding switch; the electric operation mode relies on the electromagnet to energize and release the movable interlocking plate, release the downward restriction of the toggle operation hole baffle, and unlock the rotation of the operating shaft of the grounding switch. The rotation of the operating shaft and the cam piece will not Blocked by the horizontal sliding surface of the baffle plate of the operation hole, the rotation of the operation shaft is unimpeded, thereby realizing the closing and opening of the grounding switch.

Description

A two-stage interlocking device for electric earthing switch and circuit breaker

technical field

The utility model relates to a two-stage interlocking device for an electric grounding switch and a circuit breaker, which belongs to the technical field of switch cabinets.

Background technique

The grounding switch is used to release the static charge of the electrical equipment being overhauled. It is an important mechanical grounding device to ensure the personal safety of the overhauling personnel. It can withstand the current for a certain period of time under abnormal conditions such as short circuit. , no load current is passed. In general use, the grounding switch is a part of the isolating switch, and the two are often combined into one device. At present, there are two operation modes for closing and opening of the grounding switch: (1) traditional manual operation mode; (2) electric operation mode.

In the traditional manual operation mode, the operating shaft is connected with the switch main shaft of the grounding switch by a gear, and the grounding switch operating handle is manually used to cover the end of the operating shaft, and the operating shaft is turned to drive the switch main shaft to realize the closing and opening of the grounding switch.

In the electric operation mode, the motor directly drives the switch spindle to rotate to realize the closing and opening of the grounding switch.

Both of the above two operation methods require an interlock device. Only when the back door of the switch cabinet is closed can the grounding switch be opened; only after the grounding switch is closed can the back door of the switch cabinet be opened. In addition, the interlocking plate of the circuit breaker can also be linked with the grounding switch during manual operation. When the interlocking plate of the circuit breaker is unlocked, the grounding switch can be closed to ensure the safety of operators and equipment. The interlocking device can prevent the operator from entering the electrified compartment by mistake and ensure the safety of equipment and personnel.

At present, the conventional interlock mechanism without electric operation has been perfected, but with the development of switchgear automation, the electric operation mode has been more and more widely used, and more and more grounding switches have electric functions. The existing interlock mechanism can no longer meet the requirements. In order to allow the electric earthing switch to be operated both manually and electrically, a two-stage interlocking device for the electric earthing switch and the circuit breaker is designed. The two-stage interlock device adds an interlock that meets the requirements of electric operation on the basis of the original interlock requirements for manual operation.

Utility model content

The technical problem to be solved by the utility model is to provide a two-stage interlocking device for an electric grounding switch and a circuit breaker, which solves the problem that the current grounding switch interlocking device cannot be compatible with two modes of electric operation and manual operation.

The technical problem to be solved by the utility model is realized by taking the following technical solutions:

Preferred option 1, a two-stage interlocking device for an electric grounding switch and a circuit breaker, including an operation hole baffle, the operation hole baffle is arranged in the vertical limit chute inside the cabinet, and the upper end of the operation hole baffle is pulled The spring is connected to the upper cabinet, and the upper part of the operation hole baffle is provided with a hollowed-out operation window. When the operation hole baffle is located at the top of the vertical limit chute, the lower part of the operation hole baffle will cover the grounding switch operating shaft inside. The inner side of the baffle plate of the operation hole is provided with a horizontal slide plate, and the operating shaft of the grounding switch is provided with a cam plate pressed against the horizontal slide plate, and also includes an interlock plate, a movable interlock plate and a circuit breaker interlock plate;

The interlocking plate is fixed on the bottom of the baffle plate of the operation hole, the upper part of the interlocking plate is provided with a horizontal baffle plate, and the lower part is provided with a vertical chute, and one side of the vertical chute is fixed with an electromagnet which is extended when the power is off;

The movable interlocking plate is limited to slide up and down in the vertical chute, the top of the movable interlocking plate is fixed with a guide shaft passing through the horizontal baffle, and the top of the guide shaft is fixed with a lock nut for limiting the downward movement of the movable interlocking plate. The guide shaft is covered with a compression spring between the horizontal baffle and the movable interlocking plate. A positioning hole is set on one side of the movable interlocking plate. When the compression spring is in the state of maximum extension, the suction rod of the electromagnet is just inserted into the positioning hole. Inside;

The circuit breaker interlocking plate is located below the movable interlocking plate in the horizontal limit chute on the inside of the cabinet, the outer wall of the horizontal limit chute is provided with a horizontal chute hole, and the outside of the circuit breaker interlocking plate is set through the horizontal For the handle of the chute hole, when the circuit breaker interlock plate protrudes from the horizontal limit chute, it will be blocked by the lower end of the movable interlock plate. When the circuit breaker interlock plate is completely retracted into the horizontal limit chute, limit.

On the basis of the original manual grounding switch structure, a two-stage interlocking device is designed. The two-stage interlocking device refers to the first section consisting of the operation hole baffle plate and the interlocking plate, and the movable interlocking plate connected under the interlocking plate through a compression spring and a guide shaft is the second section.

Manual operation mode:

When starting the manual operation mode, the electromagnet is not energized, and the suction rod of the electromagnet is extended and inserted into the positioning hole of the movable interlocking plate, and the operation hole baffle, the interlocking plate, and the movable interlocking plate move together. Manually retract the handle and the interlocking plate of the circuit breaker into the horizontal limit chute, so that the lower end of the movable interlocking plate is unlimited, the baffle plate of the operation hole can move down, and the cam piece on the operating shaft is not blocked by the horizontal sliding plate surface. Complete the unlocking of the operating shaft, and then pull down the baffle plate of the operating hole by manually overcoming the tension of the tension spring, and expose the end of the operating shaft of the grounding switch from the operating window, use the operating handle of the grounding switch to cover the end of the operating shaft, and the operating handle of the grounding switch drives the operating shaft. So as to drive the main shaft of the switch to realize the closing and opening of the grounding switch.

Electric operating mode:

When the electric operation mode is started to drive, the electromagnet is energized, and the suction rod of the electromagnet is separated from the positioning hole, and the operation hole baffle plate and the interlocking plate can move relative to the movable interlocking plate. The interlocking plate of the circuit breaker is in an extended state, blocking the lower end of the movable interlocking plate, and restricting the movement of the movable interlocking plate. The motor drives the switch spindle of the grounding switch to rotate, and the switch spindle drives the operating shaft to rotate through the gear. The cam on the operating shaft presses down the horizontal slide surface inside the operating hole baffle, and the operating hole baffle and the interlocking plate overcome the elastic force of the compression spring. The movable interlocking plate moves downward to unlock the operating shaft of the earthing switch, so that the rotation of the operating shaft is unimpeded, thereby realizing the closing and opening of the earthing switch.

The second preferred option, the movable interlocking plate is provided with a vertical long waist hole, and the vertical chute is fixed with a pressure riveting screw that cooperates with the long waist hole to slide.

The long waist hole is used to install the movable interlocking plate, which can move within the limited range of the long waist hole, and the operation is stable and reliable.

Preferred option 3, the operating hole baffle is provided with a vertical slideway, and a slidingly fitted limit block is arranged in the vertical slideway, and the limit block and the vertical limit slideway are fixed by screws and nuts.

In addition to being set in the vertical limit chute inside the cabinet, the operation hole baffle also cooperates with the limit block through the vertical slide to make the up and down sliding more smooth and stable.

In the fourth preferred solution, the bottom edge of the operation window of the operation hole baffle is provided with an outwardly protruding orifice.

The orifice plate can be pressed down manually to realize the downward movement of the operation hole baffle, so as to expose the operation window.

The beneficial effects of the utility model are:

(1) The original manual operation interlock structure is retained, and the downward restriction of the toggle operation hole baffle can be released by toggling the circuit breaker interlock plate, and the operation hole baffle can be manually pressed down to expose the grounding switch operation shaft from the operation window At the end, use the grounding switch operating handle to cover the end of the operating shaft, and turn the operating shaft to drive the switch main shaft to realize the closing and opening of the grounding switch;

(2) The electric operation mode relies on the electromagnet to energize and release the movable interlocking plate. Even if the circuit breaker interlocking plate is not manually toggled, when the movable interlocking plate is blocked, the operating hole baffle can overcome the elastic force of the compression spring and move down. The rotation of the operating shaft of the grounding switch is unlocked by the electromagnet, and the rotation of the operating shaft and the cam piece will not be blocked by the horizontal slide surface of the operation hole baffle, and the rotation of the cam piece will press down on the horizontal slide plate, so that the rotation of the operating shaft is unimpeded, thereby realizing grounding Closing and opening of the switch.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a top view structural schematic diagram of the operation hole baffle plate and the vertical limit chute;

Fig. 3 is a structural schematic diagram of the utility model applied to a switch cabinet;

Fig. 4 is the structural representation that electromagnet locks movable interlocking plate;

Fig. 5 is a structural schematic diagram of the horizontal sliding plate surface of the operating shaft of the earthing switch being pressed down by the cam piece;

Fig. 6 is a schematic diagram of the structure after the electromagnet unlocks the movable interlocking plate.

In the figure: 1, operation hole baffle; 101, operation window; 102, horizontal slide surface; 103, vertical slideway; 104, limit block; 105, orifice plate; 2, vertical limit chute; 3, Extension spring; 301, connecting seat; 4, cabinet body; 5, operating shaft; 501, cam piece; 6, interlocking plate; 601, horizontal baffle plate; 602, vertical chute; 603, electromagnet; 604, suction Combined rod; 605, pressure riveting screw; 7, movable interlocking plate; 701, guide shaft; 702, lock nut; 703, compression spring; 704, positioning hole; 705, long waist hole; 8, circuit breaker interlocking plate ; 801, horizontal limit chute; 802, horizontal chute hole; 803, handle; 9, grounding switch; 901, switch spindle.

detailed description

In order to understand the technical means, creative features, goals and effects of the utility model easily, the utility model will be further elaborated below in conjunction with specific embodiments.

Example 1

As shown in Figure 1, Figure 2, and Figure 5, the two-stage interlocking device includes an operation hole baffle 1, which is arranged in the vertical limit chute 2 inside the cabinet body 4, and the operation hole baffle 1. The upper end is connected with the upper cabinet body 4 through the tension spring 3. The upper end of the tension spring 3 is connected with the inside of the cabinet body 4 through the connection seat 301. The upper part of the operation hole bezel 1 is provided with a hollowed out operation window 101. When the operation hole bezel 1 is located in the vertical When the straight limit chute 2 is at the top, the bottom of the operating hole baffle plate 1 blocks the operating shaft 5 of the grounding switch 9 in the inner side, the inner side of the operating hole baffle plate 1 is provided with a horizontal slide surface 102, and the operating shaft 5 of the grounding switch 9 is provided with a pressure plate. Cam piece 501 on horizontal skateboard surface 102.

As shown in Figure 3, in the traditional manual operation mode, the operating shaft 5 is connected with the switch main shaft 901 of the grounding switch 9 by means of a gear, and the operating handle of the grounding switch is placed on the end of the operating shaft 5 manually, and the operating shaft 5 is rotated to drive the switch main shaft 901, realizing closing and opening of the grounding switch 9. When the electric operation mode is adopted, a gear can be arranged on the switch main shaft 901, and the motor drives the gear and the switch main shaft 901 to rotate, thereby realizing the electric closing and opening operations of the grounding switch.

In addition to the above structure, this scheme also includes an interlocking plate 6, a movable interlocking plate 7 and a circuit breaker interlocking plate 8;

The interlocking plate 6 is fixed on the bottom of the operation hole baffle 1, the upper part of the interlocking plate 6 is provided with a horizontal baffle 601, and the lower part is provided with a vertical chute 602, and one side of the vertical chute 602 is fixed with a pull-in rod 604 extending in the power-off state. The long electromagnet 603, the electromagnet 603 adopts commercially available products, is mainly composed of a pull-in rod 604 adsorbed by an electromagnetic coil, and a return spring that pushes the pull-in rod 604 out to elongate when the power is off;

The movable interlocking plate 7 is limited to slide up and down in the vertical chute 602. The top of the movable interlocking plate 7 is fixed with a guide shaft 701 passing through the horizontal baffle plate 601. The locking nut 702, the guide shaft 701 is covered with a compression spring 703 between the horizontal baffle plate 601 and the movable interlocking plate 7, a positioning hole 704 is set on one side of the movable interlocking plate 7, and when the compression spring 703 is at the maximum elongation state, the pull-in rod 604 of the electromagnet 603 is just inserted into the positioning hole 704;

The circuit breaker interlock plate 8 is located in the horizontal limit chute 801 inside the cabinet body 4 under the movable interlock plate 7, and the horizontal limit chute 801 is provided with a horizontal chute hole 802 on the outer wall, and the circuit breaker interlock plate 8 A handle 803 passing through the horizontal chute hole 802 is provided on the outside. When the circuit breaker interlock plate 8 protrudes from the horizontal limit chute 801, it is blocked at the lower end of the movable interlock plate 7, and the circuit breaker interlock plate 8 is completely retracted into the horizontal limit. During position chute 801, movable interlocking plate 7 lower ends are unlimited.

On the basis of the structure of the original manual earthing switch 9, a two-stage interlocking device is designed. The two-stage interlocking device refers to: the first section composed of the operation hole baffle plate 1 and the interlocking plate 6, and the movable interlocking plate 7 connected under the interlocking plate 6 by the compression spring 703 and the guide shaft 701 is the second. part.

Manual operation mode:

As shown in Figure 1, when the manual operation mode is started, the electromagnet 603 is not energized, and the pull-in rod 604 of the electromagnet 603 is extended and inserted into the positioning hole 704 of the movable interlocking plate 7 to operate the hole baffle plate 1, the interlocking plate 6, The movable interlocking plate 7 moves integrally. Manually move the handle 803 and the circuit breaker interlock plate 8 into the horizontal limit chute 801, so that the lower end of the movable interlock plate 7 is unlimited, the operation hole baffle plate 1 can move down, and the cam plate 501 on the operation shaft 5 Not blocked by the horizontal slide surface 102, the unlocking of the operating shaft 5 is completed, and then the operating hole baffle 1 is pulled down by manually overcoming the tension of the tension spring 3, and the end of the operating shaft 5 of the grounding switch 9 is exposed from the operating window 101, and the operating handle of the grounding switch 9 is used Covered on the end of the operating shaft 5, the operating handle of the grounding switch 9 drives the operating shaft 5, thereby driving the switch main shaft 901 to realize closing and opening of the grounding switch 9.

The original manual operation interlock structure is retained, and the downward restriction of the operation hole baffle 1 can be lifted by toggling the circuit breaker interlock plate 8, and the operation hole baffle 1 is manually pressed down to expose the grounding switch 9 from the operation window 101 At the end of the operating shaft 5, use the operating handle of the grounding switch 9 to cover the end of the operating shaft 5, and turn the operating shaft 5 to drive the switch main shaft 901 to realize closing and opening of the grounding switch 9.

Electric operating mode:

As shown in Figure 1, Figure 4-Figure 6, when the electric operation mode is started, the electromagnet 603 is energized, the suction rod 604 of the electromagnet 603 is disengaged from the positioning hole 704, and the operation hole baffle plate 1 and the interlock plate 6 can be opposite to each other. Movable interlocking plate 7 motions. The circuit breaker interlocking plate 8 is in an extended state, blocking the lower end of the movable interlocking plate 7 and limiting the movement of the movable interlocking plate 7 . The motor drives the switch main shaft 901 of the grounding switch 9 to rotate, and the switch main shaft 901 drives the operating shaft 5 to rotate through gears. The cam piece 501 on the operating shaft 5 presses down the horizontal slide surface 102 on the inner side of the operating hole baffle 1, and the operating hole baffle 1 And the interlocking plate 6 overcomes the elastic force of the compression spring 703 and moves downward relative to the movable interlocking plate 7, unlocking the operating shaft 5 of the grounding switch 9, so that the operating shaft 5 rotates without hindrance, thereby realizing the closing and opening of the grounding switch 9.

The electric operation mode relies on the electromagnet 603 to energize and release the movable interlocking plate 7. Even if the circuit breaker interlocking plate 8 is not manually activated, when the movable interlocking plate 7 is blocked, the operating hole baffle 1 can overcome the elastic force of the compression spring 703 Move down, unlock the grounding switch 9 through the electromagnet 603, and the rotation of the operation shaft 5 will not be blocked by the horizontal slide surface 102 of the operation hole baffle 1, and the rotation of the cam plate 501 will press down the horizontal slide , so that the rotation of the operating shaft 5 is unimpeded, thereby realizing the closing and opening of the grounding switch 9 .

Original electric operation mode (without electromagnet 603 and movable interlocking plate 7):

When starting the drive in the electric operation mode, the operator still needs to manually toggle the circuit breaker interlock plate 8, so that the lower end of the operation hole baffle 1 is unlimited, so that the operation hole baffle 1 cannot be moved down, and the cam piece is restricted by the horizontal slide surface 102 501 rotates, thereby causing the operation shaft 5 to fail to rotate, so that the switch main shaft 901 and the motor that are connected to the operation shaft 5 through gears are locked. However, this program does not need to manually release the circuit breaker interlock plate 8, and the operation hole baffle plate 1 and the interlock plate 6 located in the first section can be unlocked by the electromagnet 603 and connected with the movable interlock plate 7 of the second section, so that the first section The segment can be moved down relative to the second segment, so that the earthing switch 9 can be operated manually and fully automatically.

Example 2

As shown in FIG. 4 , other structures are the same as in Embodiment 1. The movable interlocking plate 7 is provided with a vertical long waist hole 705 , and the vertical chute 602 is fixed with a pressure riveting screw 605 that slides with the long waist hole 705 . The specific fixing method is to set thread at the end of the pressure riveting screw 605, screw the nut into the pressure riveting screw 605, and there is a gap from the movable interlocking plate 7, so that the movable interlocking plate 7 can slide up and down freely.

The movable interlocking plate 7 is movably installed with the long waist hole 705, which can move within the limited range of the long waist hole 705, and the operation is stable and reliable.

Example 3

As shown in Figures 1 and 2, other structures are the same as in Embodiment 2. The operating hole baffle plate 1 is provided with a vertical slideway 103, and a slidingly fitted limit block 104 is arranged in the vertical slideway 103. Fix the limit block 104 with the vertical limit chute 2 .

In addition to being arranged in the vertical limit chute 2 inside the cabinet body 4, the operation hole baffle plate 1 also cooperates with the limit block 104 through the vertical slideway 103, so that the up and down sliding is smoother and more stable.

Example 4

As shown in FIG. 1 and FIG. 2 , other structures are the same as in Embodiment 1, and the bottom edge of the operation window 101 of the operation hole baffle plate 1 is provided with an outwardly protruding orifice plate 105 .

The operation hole baffle plate 1 can be moved down by manually pressing down the orifice plate 105 so as to expose the operation window 101 .

In addition, the orifice plate 105 can also be used in conjunction with another orifice plate 105 (not shown) fixed on the corresponding position above the back of the cabinet body 4, and the two orifice plates 105 can be locked by a lock to prevent unauthorized personnel from mistakenly operate.

The basic principles, main features and advantages of the present utility model have been shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above-mentioned embodiments. On the premise of not departing from the spirit and scope of the utility model, the utility model also has various changes and improvements, and these changes and improvements all fall into the Into the scope of protection required by the utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (4)

1. A two-section type interlocking device of an electric grounding switch and a circuit breaker comprises an operation hole baffle, wherein the operation hole baffle is arranged in a vertical limiting chute in a cabinet body, the upper end of the operation hole baffle is connected with a cabinet body above the operation hole baffle through a tension spring, a hollowed-out operation window is arranged at the upper part of the operation hole baffle, when the operation hole baffle is positioned at the uppermost part of the vertical limiting chute, an operation shaft of the grounding switch is shielded inside by the lower part of the operation hole baffle, a horizontal sliding plate surface is arranged at the inner side of the operation hole baffle, and the operation shaft of the grounding switch is provided with a cam piece pressed on the horizontal sliding plate surface;

the interlocking plate is fixed at the bottom of the operating hole baffle, a horizontal baffle is arranged at the upper part of the interlocking plate, a vertical chute is arranged at the lower part of the interlocking plate, and an electromagnet for drawing the attraction rod to extend in a power-off state is fixed on one side of the vertical chute;

the movable interlocking plate is limited to slide up and down in the vertical chute, a guide shaft penetrating through the horizontal baffle is fixed at the top of the movable interlocking plate, a locking nut used for limiting the downward movement of the movable interlocking plate is fixed at the top end of the guide shaft, a compression spring between the horizontal baffle and the movable interlocking plate is sleeved on the guide shaft, a positioning hole is formed in one side of the movable interlocking plate, and when the compression spring is in a maximum extension state, a suction rod of the electromagnet is just inserted into the positioning hole;

the circuit breaker interlocking plate is arranged below the movable interlocking plate and located in a horizontal limiting sliding groove on the inner side of the cabinet body, a horizontal sliding groove hole is formed in the outer side wall of the horizontal limiting sliding groove, a handle penetrating through the horizontal sliding groove hole is arranged on the outer side of the circuit breaker interlocking plate, the circuit breaker interlocking plate is blocked at the lower end of the movable interlocking plate when extending out of the horizontal limiting sliding groove, and when the circuit breaker interlocking plate is completely retracted into the horizontal limiting sliding groove, the lower end of the movable interlocking plate is not limited.

2. The two-stage interlocking device of the electric grounding switch and the circuit breaker as claimed in claim 1, wherein the movable interlocking plate is provided with a vertical long waist hole, and a rivet pressing screw which is matched with the long waist hole to slide is fixed on the vertical chute.

3. The two-stage interlocking device of the electric grounding switch and the circuit breaker according to claim 1 or 2, wherein the operation hole baffle is provided with a vertical slideway, a limiting block in sliding fit is arranged in the vertical slideway, and the limiting block and the vertical limiting chute are fixed through screws and nuts.

4. The two-stage interlock device for an electric grounding switch and circuit breaker as claimed in claim 1, wherein the bottom edge of the operation window of the operation hole baffle is provided with an outwardly protruding hole plate.

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