CN217157992U

CN217157992U - Interlocking device for rear door and grounding switch operating shaft of middle-placed switch cabinet

Info

Publication number: CN217157992U
Application number: CN202122920313.7U
Authority: CN
Inventors: 何明; 姚梅珍; 杨晓琴
Original assignee: Jiangsu Chengxiang Electric Appliance Co ltd
Current assignee: Jiangsu Chengxiang Electric Appliance Co ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-08-09
Anticipated expiration: 2031-11-25

Abstract

The utility model discloses an in put cubical switchboard back door and earthing switch operating axis interlock. It includes the earthing switch operating axis, fixed mounting's on the cubical switchboard locating plate and the cubical switchboard back door fixed mounting's hasp board, the hasp axle is installed to the rear end of earthing switch operating axis, and settle between the rear end of earthing switch operating axis and hasp axle has reset spring, the rear end of hasp axle be provided with hasp board complex locking piece and with locating plate complex locating pin, it is spacing with the locating plate to make locating pin and locating plate carry out simultaneously when hasp board and locking piece are in the unblock position, thereby can push the removal of hasp axle through the hasp board and make the unblock and then can make the rotation of earthing switch operating axis between locating pin and the locating plate. After the structure is adopted, the purpose of preventing accidental injury accidents can be realized by simply and skillfully designing the structure, the operation is very convenient, the interlocking is also very reliable, and the problem of potential safety hazard caused by the fault of the existing interlocking mechanism is effectively solved.

Description

Interlocking device for rear door and grounding switch operating shaft of centrally installed switchgear

Technical Field

The utility model relates to an interlock of high tension switchgear back door, put cubical switchboard back door and earthing switch operating axis interlock in specific saying so.

Background

In the high-voltage switch equipment, for the rear door of a central switch cabinet, the requirement that the rear door can not be opened when a grounding switch is not closed is met, the specific requirement that the earthing switch cannot be operated when the rear door of the switch cabinet is not closed, in the prior art, an interlocking mechanism is usually arranged between an earthing switch operating shaft and a circuit breaker, by the interlocking mechanism, the switch cabinet can not transmit power when the grounding switch is not opened, thereby preventing accidents, however, the existing interlocking mechanism is usually very complex in design, high in equipment cost, many in transmission links, poor in reliability, the problems that the interlocking mechanism is in failure, the reliable interlocking cannot be realized and the operation and the use are inconvenient are often caused in the using process, therefore, people can mistakenly enter the electrified interval because the rear door of the cabinet is not closed, and the problem of accident accidents still exists.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide an operation simple to use, interlocking are reliable to can avoid the interlocking device trouble to bring the back door of the centrally installed switchgear and earthing switch operating axis interlock of potential safety hazard problem.

In order to solve the technical problem, the utility model discloses an in put cubical switchboard back door and earthing switch operating axis interlock, including installing in the cubical switchboard ground switch operating axis that can rotate, fixed mounting's locating plate and cubical switchboard back door on the hasp board, the hasp axle that can ground switch operating axis back-and-forth movement relatively is installed to the rear end of earthing switch operating axis, and settle between the rear end of ground switch operating axis and the hasp axle has reset spring, when the earthing switch operating axis rotates to make earthing switch be in the combined floodgate state, can make hasp board and locking piece be in the unblock position, thereby it is spacing with the locating plate to make locating pin and locating plate carry out simultaneously, thereby the hasp board that removes along with the cubical switchboard back door can push away the removal of hasp axle and make the unblock between locating pin and the locating plate and then can make the earthing switch operating axis rotate.

The locking piece is the bar piece, be provided with on the hasp board with locking piece complex waist shape hole groove, be provided with the spacing groove that is used for injecing the locating pin on the locating plate.

The kidney-shaped hole groove is vertically arranged on the lock catch plate, and the limit groove is vertically arranged on the positioning plate.

The two ends of the positioning pin radially extend out of the outer surface of the lock shaft, and the positioning plate is provided with two limiting grooves matched with the two ends of the positioning pin.

The rear end of the grounding switch operating shaft is provided with a section of shaft neck, the locking shaft is provided with a sliding groove matched with the shaft neck, and the shaft neck extends into the sliding groove and is matched with the locking shaft through a guide structure so that the locking shaft can move back and forth relative to the grounding switch operating shaft.

The guide structure comprises a waist-shaped hole formed in the shaft neck and a connecting hole formed in the lock catch shaft, and a connecting pin for connecting the lock catch shaft and the shaft neck through the waist-shaped hole is connected in series in the connecting hole.

The guide structure comprises a waist-shaped hole formed in the lock catch shaft and a connecting pin fixedly mounted on the shaft neck, and the shaft neck extends into the sliding groove and enables the connecting pin to extend out of the waist-shaped hole.

After adopting foretell structure, through the hasp axle that can ground switch operating axis back-and-forth movement relatively that sets up, set up on the hasp axle with hasp board complex locking piece and with locating plate complex locating pin, consequently when can making ground switch not close a floodgate, back door interlocking can't be relieved, the back door can't be opened, and when the cubical switchboard back door was not closed, ground switch operating axis was pinned, can't rotate, ground switch can't operate, thereby the operational safety problem has been guaranteed, from this through simple ingenious structural design alright realize the purpose that prevents the accident and take place, and its operation is also very convenient, interlocking is also very reliable, effectively stopped current interlocking device trouble and brought the potential safety hazard problem.

Drawings

Fig. 1 is a schematic view of a partial structure of a rear door of a middle switch cabinet in an open state;

fig. 2 is a schematic view of a partial structure of the rear door of the middle switch cabinet according to the present invention.

Detailed Description

The following describes the middle-placed switch cabinet back door and earthing switch operating shaft interlocking device in further detail with reference to the accompanying drawings and specific embodiments.

As shown in the figures, the middle-placed switch cabinet back door and ground switch operating shaft interlocking device of the utility model can be applied to a KYN28A middle-placed high-voltage switch cabinet, KNY61 switch cabinet, it comprises a ground switch operating shaft 1 which is installed in the switch cabinet and can only rotate but can not move back and forth, and can not move left and right, a positioning plate 2 fixedly installed on the switch cabinet, and a lock catch plate 3 fixedly installed on the switch cabinet back door, a lock catch shaft 4 which can move back and forth relative to the ground switch operating shaft is installed at the back end of the ground switch operating shaft 1 (the direction of moving from the back cabinet door to the inside of the switch cabinet is defined as the front, the direction of moving from the inside of the switch cabinet to the outside of the back cabinet door is defined as the back), a locking piece 6 matched with the lock catch plate 3 and a positioning pin 7 matched with the positioning plate 2 are arranged at the back end of the lock catch shaft 4, a kidney-shaped hole groove 8 matched with the locking piece 6 is arranged on the lock catch plate 3, the waist-shaped hole groove 8 is vertically arranged on the lock catch plate 3, the positioning plate 2 is provided with an upper limiting groove and a lower limiting groove which are vertically arranged and used for limiting the positioning pin 7, as can be seen from the figure, the locking piece 6 is a strip-shaped piece which can be limited in the waist-shaped hole groove 8, two ends of the positioning pin 7 radially extend out of the outer surface of the lock catch shaft 4, the positioning plate 2 is provided with a through hole which can enable the lock catch shaft 4 to extend out, after the lock catch shaft 4 extends out of the through hole, two ends of the positioning pin 7 can be limited in the two limiting grooves, the rotation of the earthing switch operating shaft 1 is also prevented, the rear end of the earthing switch operating shaft 1 is provided with a section of shaft neck 9, the lock catch shaft 4 is provided with a chute matched with the shaft neck, the shaft neck 9 extends into the chute and is matched and installed with the lock catch shaft through a guide structure, so that the lock catch shaft can enable the lock catch shaft to be butted with the earthing switch operating shaft to move back and forth, in addition, the resetting spring which is limited between the rear end of the earthing switch operating shaft 1 and the front end of the lock catch shaft 4 is sleeved on the shaft 9 5; when the grounding switch operating shaft 1 rotates to enable the grounding switch to be in a closing state, the lock catch plate 3 and the locking piece 6 can be located at unlocking positions, the positioning pin 7 and the positioning plate 2 are limited, and when the rear door of the switch cabinet is closed, the lock catch plate 3 can push the lock catch shaft 4 to move forwards, so that the positioning pin 7 and the positioning plate 2 are unlocked, and the grounding switch operating shaft 1 can rotate.

Furthermore, the guiding structure can comprise a waist-shaped hole formed in the shaft neck 9 and a connecting hole formed in the locking shaft 4, a connecting pin 10 for connecting the locking shaft and the shaft neck through the waist-shaped hole is connected in series in the connecting hole, the guiding structure can also comprise a waist-shaped hole formed in the locking shaft 4 and a connecting pin 10 fixedly installed on the shaft neck 9, the shaft neck 9 extends into the sliding groove and enables the connecting pin 10 to extend out of the waist-shaped hole, and the locking shaft and the grounding switch operating shaft are connected together through the connecting pin, so that the locking shaft can move back and forth in the axial direction and can rotate together with the grounding switch operating shaft.

Furthermore, in the prior art, the interlocking is arranged between the grounding switch operating shaft and the circuit breaker, when the grounding switch is not opened, the circuit breaker cannot enter the working position, and the high-voltage switch cabinet cannot transmit power, so that the safety protection purpose is further improved.

The working principle is as follows:

(1) switch cabinet back door from closed state to open state

When the earthing switch operating shaft 1 is rotated to enable the earthing switch to be in a closing state, the directions of the positioning pin 7 on the locking shaft 4 and the two limiting grooves on the positioning plate 2 are consistent, the strip-shaped block at the rear end of the locking shaft 4 and the kidney-shaped hole groove of the locking plate 3 mounted on the rear cabinet door are also in a consistent state, the door is in an unlocking state, when the door is opened, the locking shaft 4 pushes the locking shaft to move backwards (outside the rear cabinet door) under the action of a reset spring until the positioning pin 7 completely enters the two limiting grooves of the positioning plate (see fig. 1), the locking shaft 4 is locked and cannot rotate at the moment, and the earthing switch operating shaft 1 and the locking shaft 4 are connected together through a connecting pin, so that the earthing switch operating shaft cannot rotate at the moment, and the condition that the earthing switch cannot be opened under the door opening state is guaranteed.

(2) Switch cabinet back door from open state to closed state

When closing back cabinet door, the bar-shaped piece on the hasp axle 4 can get into the kidney shape open-slot of hasp board 3 at first, then hasp board 3 can lean on the rear end face of pressing hasp axle 4 to push hasp axle 4 forward (the inside direction of cubical switchboard), locating pin 7 on the hasp axle 4 also moves forward along with the hasp axle together, locating pin 7 gradually leaves two spacing grooves of locating plate, when the back cabinet door is closed, locating pin 7 breaks away from two spacing grooves of locating plate completely, earthing switch operating axis 1 is unblock this moment, can rotate earthing switch operating axis 1 and make earthing switch separating brake, after earthing switch separating brake, bar-shaped piece on the hasp axle 4 is perpendicular with the kidney shape open-slot on the hasp board 3 (see figure 2), back cabinet door is pinned.

Claims

1. The utility model provides a put cubical switchboard back door and earthing switch operating axis interlock which characterized in that: the novel grounding switch cabinet is characterized by comprising a grounding switch operating shaft (1) which is arranged in the switch cabinet and can rotate, a positioning plate (2) fixedly arranged on the switch cabinet and a lock catch plate (3) fixedly arranged on a rear door of the switch cabinet, wherein the rear end of the grounding switch operating shaft (1) is provided with a lock catch shaft (4) which can move back and forth relative to the grounding switch operating shaft, a reset spring (5) is arranged between the rear end of the grounding switch operating shaft (1) and the lock catch shaft (4), and the rear end of the lock catch shaft (4) is provided with a locking piece (6) matched with the lock catch plate (3) and a positioning pin (7) matched with the positioning plate (2); when the grounding switch operating shaft (1) rotates to enable the grounding switch to be in a closing state, the locking plate (3) and the locking piece (6) can be located at unlocking positions, the positioning pin (7) and the positioning plate (2) are limited, and the locking plate (3) moving along with the rear door of the switch cabinet can push the locking shaft (4) to move, so that the positioning pin (7) and the positioning plate (2) are unlocked, and the grounding switch operating shaft (1) can rotate.

2. The center-mounted switchgear back door and earthing switch operating shaft interlocking device according to claim 1, characterized in that: the locking piece (6) is a strip-shaped block, a kidney-shaped hole groove (8) matched with the locking piece (6) is formed in the lock catch plate (3), and a limiting groove used for limiting the positioning pin (7) is formed in the positioning plate (2).

3. The center-mounted switchgear back door and earthing switch operating shaft interlocking device according to claim 2, characterized in that: the waist-shaped hole groove (8) is vertically arranged on the lock catch plate (3), and the limit groove is vertically arranged on the locating plate (2).

4. The center-mounted switchgear back door and earthing switch operating shaft interlocking device according to claim 3, characterized in that: the two ends of the positioning pin (7) radially extend out of the outer surface of the lock shaft (4), and the positioning plate (2) is provided with two limiting grooves matched with the two ends of the positioning pin (7).

5. The center-mounted switchgear back door and earthing switch operating shaft interlock device according to claim 1, 2, 3 or 4, characterized in that: the rear end of the grounding switch operating shaft (1) is provided with a section of shaft neck (9), the locking shaft (4) is provided with a sliding groove matched with the shaft neck, and the shaft neck (9) extends into the sliding groove and is matched with the locking shaft through a guide structure so that the locking shaft can move back and forth relative to the grounding switch operating shaft.

6. The center-mounted switchgear back door and earthing switch operating shaft interlocking device according to claim 5, characterized in that: the guide structure comprises a waist-shaped hole formed in the shaft neck (9) and a connecting hole formed in the lock catch shaft (4), and a connecting pin (10) for connecting the lock catch shaft and the shaft neck through the waist-shaped hole is connected in series in the connecting hole.

7. The center-mounted switchgear back door and earthing switch operating shaft interlocking device according to claim 5, characterized in that: the guide structure comprises a waist-shaped hole formed in the lock catch shaft (4) and a connecting pin (10) fixedly mounted on the shaft neck (9), and the shaft neck (9) extends into the sliding groove and enables the connecting pin (10) to extend out of the waist-shaped hole.