CN221008805U - Electrical cabinet - Google Patents

Abstract

The present disclosure provides an electrical cabinet including a circuit breaker, a door, and a safety restraint mechanism. The circuit breaker includes a breaking button, a first protrusion and a second protrusion. The trip button is configured to move the first tab and the second tab when actuated, thereby breaking the ground circuit. The safety restraint mechanism includes a door connector and a lock connected to the door. The door link is positioned at a first door connection position and a second door connection position as the door is opened and closed. The locking piece comprises a first locking part and a second locking part. The mating guide of the locking member mates with the guide of the door connector such that: when the door connecting piece is at the first door connecting position, the locking piece is positioned at a locking position, in which the first locking part is positioned on a first moving path of the first protruding part, and the second locking part is positioned on a second moving path of the second protruding part, so as to prevent the brake release button from being actuated; the locking member is positioned in the unlocked position when the door link is in the second door link position.

Description

Electrical cabinet

Technical Field

The present disclosure relates to an electrical cabinet.

Background

The medium-voltage cabinet comprises a three-position switch and a breaker, and the three-position switch and the breaker jointly control the connection or disconnection of a grounding loop of the medium-voltage cabinet. The circuit breaker performs an opening and closing operation through a transmission mechanism such as a circuit breaker spring operating mechanism. The opening of the circuit breaker will cause the opening of the ground circuit of the electrical cabinet. When the switch-off button of the circuit breaker is pressed, the switch-off button enables the moving contact and the fixed contact to be separated through the transmission mechanism, so that the grounding loop is disconnected.

For safety of operators, the electrical cabinet should be in a grounded state before the cable chamber door is opened, and the circuit breaker is kept in an on state, and when the cable chamber door is in an opened state, the circuit breaker needs to be prevented from being opened (i.e., disconnected) by a safety restriction mechanism.

Disclosure of utility model

At least some embodiments of the present disclosure provide an electrical cabinet including a circuit breaker, a door for opening and closing a cable chamber, and a safety restraint mechanism. The circuit breaker comprises a fixed contact, a moving contact, a brake separating button, a first protruding part and a second protruding part. The switch-off button is configured to drive the first protruding part and the second protruding part to move when actuated, and drive the moving contact to move via the first protruding part and the second protruding part so as to separate the moving contact from the fixed contact, thereby disconnecting the grounding circuit of the electrical cabinet. The safety restraint mechanism includes a door connector and a lock connected to the door. The door link translates in a first direction as the door opens and closes to be positioned in a first door connection position corresponding to the opening of the door and a second door connection position corresponding to the closing of the door. The door connector is provided with a guide. The locking member includes a first locking portion, a second locking portion, and a mating guide. The mating guide mates with the guide such that: when the door connecting piece is at the first door connecting position, the locking piece is positioned at a locking position, in which the first locking part is positioned on a first moving path of the first protruding part, and the second locking part is positioned on a second moving path of the second protruding part, so as to prevent the brake release button from being actuated; when the door link is in the second door connection position, the lock is positioned in an unlocked position in which the first lock portion is clear of the first path of movement and the second lock portion is clear of the second path of movement to allow the release button to be actuated.

For example, in some embodiments, the safety restraint mechanism further includes a fastener, the circuit breaker includes a housing wall, and the first tab and the second tab extend from the housing wall. The securing member is secured to a housing wall of the circuit breaker and the locking member is pivotally mounted to the securing member such that the locking member moves between a locked position proximate the circuit breaker and an unlocked position distal the circuit breaker.

For example, in some embodiments, the first direction is parallel to the housing wall, the pivot axis of the locking member is perpendicular to the first direction and parallel to the housing wall, and the extension directions of the first and second protrusions are perpendicular to the housing wall.

For example, in some embodiments, the guide is a guide opening extending in a second direction that is inclined toward the circuit breaker relative to the first direction, and the mating guide is a guide pin disposed in the guide opening.

For example, in some embodiments, the lock includes a lock body and a tab. A tab extends from the locking protrusion and perpendicular to the locking body, and a guide pin is connected to the tab. The locking body is in the form of a sheet extending parallel to the housing wall, and the first locking portion and the second locking portion are included in the locking body.

For example, in some embodiments, the first locking portion is a hook that forms a first notch. In the locking position, the first protrusion is inserted into the first notch to be hooked by the first locking portion.

For example, in some embodiments, the second locking portion forms a second notch. In the locked position, the second protrusion is inserted into the second notch, and the stop edge of the second notch is located on the second moving path. The stopper edge is inclined with respect to the extending direction of the second projection to enlarge the second notch in a direction toward the second projection.

For example, in some embodiments, the first protrusion is fixed to the release button and the second protrusion is movable relative to the release button.

Drawings

Fig. 1 shows a perspective view of an electrical cabinet according to an embodiment of the present disclosure;

Fig. 2 shows a perspective view of the circuit breaker and safety restraint mechanism of fig. 1, wherein in fig. 2 and 3 the door link is in a first door-connected position and the lock is in a locked position, and in fig. 4 the door link is in a second door-connected position and the lock is in an unlocked position;

FIGS. 5 and 6 illustrate side views of the safety restraint mechanism shown in FIG. 2, respectively;

FIG. 7 shows a side view of a portion of the safety restraint mechanism depicted in FIG. 2, wherein in FIG. 5 the door link is in a first door-connected position and the lock is in a locked position, and in FIGS. 6 and 7 the door link is in a second door-connected position and the lock is in an unlocked position; and

Fig. 8 shows a perspective view of a part of the installation limiting mechanism according to fig. 2.

Detailed Description

Hereinafter, an electrical cabinet according to an embodiment of the present disclosure is described in detail with reference to the accompanying drawings.

Fig. 1 shows a perspective view of an electrical cabinet according to an embodiment of the present disclosure. As shown in fig. 1, the electrical cabinet includes a circuit breaker 150 and a cable chamber door 140 for opening and closing the cable chamber. For operator safety, it is desirable to prevent the circuit breaker 150 from breaking the circuit while the door 140 is in the open state.

Fig. 2 shows a perspective view of the circuit breaker 150 and the safety restraint mechanism of fig. 1. Fig. 3 and 4 show another perspective view of the circuit breaker 150 and the safety restraint mechanism shown in fig. 2, respectively. In fig. 2 and 3, the door link 111 is in the first door link position and the lock 120 is in the locked position. In fig. 4, the door link 111 is in the second door link position and the lock 120 is in the unlocked position.

As shown in fig. 2 to 4, the circuit breaker 150 includes a breaking button 151, a closing button 152, a first protrusion 153, and a second protrusion 154. In addition, the circuit breaker 150 further includes a moving contact (not shown) and a stationary contact (not shown) for switching on and off a circuit. When the opening button 151 is pressed, the opening button 151 drives the first protrusion 153 and the second protrusion 154 to move, and drives the moving contact to move via the first protrusion 153 and the second protrusion 154, so as to separate the moving contact from the fixed contact, thereby disconnecting the ground circuit. When the closing button 152 is pressed, the closing button 152 drives the moving contact to move so as to enable the moving contact to contact with the fixed contact, and therefore the circuit breaker is closed. In the case of a circuit breaker closing, the circuit breaker may open a ground circuit together with the three-position switch in the ground position. In this example, the first protrusion 153 is fixed to the release button 151. The second protrusion 154 is movable with respect to the release button 151. That is, the first protrusion 153 may be regarded as a part of the release button 151, and the second protrusion 154 is a transmission member in a transmission path between the release button 151 and the moving contact, but the present disclosure is not limited thereto.

As described above, the door 140 is used to open and close the cable chamber. In order to ensure that the ground circuit is not broken by the circuit breaker in the state in which the door 140 is opened, a safety limiting mechanism is provided between the door 140 and the circuit breaker 150.

Fig. 5 and 6 show side views of the safety restraint mechanism shown in fig. 2, respectively. Fig. 7 shows a side view of a portion of the safety restraint mechanism described in fig. 2 (the second door link 112 is not shown in fig. 2-4 and 7 for clarity). In fig. 5, the door link 111 is in the first door link position and the lock 120 is in the locked position. In fig. 6 and 7, the door link 111 is in the second door link position and the lock 120 is in the unlocked position.

As shown in fig. 5-7, the safety restraint mechanism includes a second door link 112, a door link 111, a lock 120, and a securing member 130. The door link 111 is connected to the door 140 via a second door link 112. For example, the door link 111 and the second door link 112 may be fixedly connected. The door link 111 translates in a first direction (vertical direction) as the door 140 is opened and closed to be positioned at a first door connection position corresponding to the opening of the door 140 and a second door connection position corresponding to the closing of the door 140. In this example, the first door connection position is an upper side position of the door link 111, and the second door connection position is a lower side position of the door link 111. It should be noted that there may be a lateral offset between the first door connection position and the second door connection position, but the door link 111 may be considered to translate generally in the first direction. The door link 111 is provided with a guide opening 113 (i.e., a guide) in which a guide pin 123 (i.e., a mating guide) of the locking member 120 is disposed in the door 140 guide. Accordingly, the guide opening 113 and the guide pin 123 are engaged with each other such that the locking member 120 is located at the locking position when the door link 111 is at the first door link position, and the locking member 120 is located at the unlocking position when the door link 111 is at the second door link position. It is noted that the present disclosure may also cooperate the position of the door link 111 and the position of the lock 120 by other guiding arrangements between the lock 120 and the door link 111.

As shown in fig. 7, the locking member 120 includes a first locking portion 122 and a second locking portion 121. As shown in fig. 2 and 3, in the locked position, the first locking portion 122 is on the first moving path of the first protrusion 153, and the second locking portion 121 is on the second moving path of the second protrusion 154. Accordingly, the first and second locking parts 122 and 121 prevent the first and second protrusions 153 and 154, respectively, from moving to jointly prevent the brake release button 151 from being actuated. As shown in fig. 4, in the unlocked position, the first locking portion 122 is clear of the first path of movement and the second locking portion 121 is clear of the second path of movement to allow the release button to be actuated. Accordingly, when the door 140 of the cable chamber is in an opened state, the first and second locking parts 122 and 121 prevent the first and second protruding parts 153 and 154, respectively, to prevent the opening button from being pressed, thereby preventing the ground circuit from being disconnected by the circuit breaker. The blocking of the first protrusion 153 and the second protrusion 154 by the first locking part 122 and the second locking part 121 achieves double locking as compared to the blocking of only one of the first protrusion 153 and the second protrusion 154. Therefore, the moment that the brake release button 151 can be pressed by the safety limiting mechanism can be increased, and the brake release button 151 is prevented from being accidentally released due to the violent pressing of the brake release button 151. For example, in the case where only the first protrusion 153 is prevented, the brake release button 151 may be accidentally released, resulting in an erroneous operation by the operator, which forms a safety hazard.

As shown in fig. 2 and 7, the circuit breaker 150 further includes a housing wall 155, the first direction being parallel to the extending direction of the housing wall 155. The first protrusion 153 and the second protrusion 154 extend outwardly in a direction perpendicular to the housing wall 155 so as to be accessible by the locking member 120 disposed outside the circuit breaker 150. The fixture 130 is a sheet-like member that is fixedly mounted to the circuit breaker 150 in abutment with the housing wall 155. The locking member 120 is pivotally mounted to the fixed member 130 such that the locking member 120 pivots about a pivot axis X between a locked position (see fig. 2, 3 and 5) proximate the circuit breaker 150 and an unlocked position (see fig. 4, 6 and 7) distal from the circuit breaker 150. As shown in fig. 7, the guide opening 113 extends in a second direction, which is inclined toward the circuit breaker 150. By the engagement of the guide pin 123 of the locking member 120 and the guide opening 113 of the door link 111 with each other, the movement of the door link 111 in the first direction causes the locking member 120 to pivot between the locking position and the unlocking position. Specifically, when the door link 111 is at the upper first door link position, the guide pin 123 is located at the lower end of the guide opening, and the locking piece 120 is pivoted clockwise to the locking position; when the door link 111 is in the second door connection position of the lower side, the guide pin 123 is located at the upper end of the guide opening, and the locking member 120 is pivoted counterclockwise to the unlocking position. Due to the simple structure of the safety restricting mechanism, the transmission chain is short, and thus the accumulation of dimensional errors is small, preventing the first locking portion 122 and the second locking portion 121 from failing to be blocked due to the accumulation of dimensional errors. Thus, the possibility that the opening button 151 is accidentally opened is reduced. Further, due to the simple structure of the safety restricting mechanism, it can be disposed in a narrow space, reducing the occupied area. In addition, the door link 111 and the lock 120 can each be made of a material having high rigidity (e.g., stainless steel) instead of using plastic that is easily deformed, further allowing for reduction in the accumulation of dimensional errors.

The shape of the individual components in the safety restraint mechanism can be designed according to the layout in the electrical cabinet to achieve a compact layout. The locking member 120 includes a locking body 124 and a tab 125 extending from the locking body 124 in a direction perpendicular to the locking body. The guide pin 123 is provided on a tab 125 extending in a direction parallel to the housing wall 155 and perpendicular to the first direction. The guide pin 123 is parallel to the pivot axis X of the locking member 120. The locking body 124 and the tab 125 are both sheet-like, and the locking member 120 may be simply formed by a stamping process, for example. The first locking portion 122 and the second locking portion 121 are included in the locking body 124. The locking member 120 is mounted such that the locking body 124 extends in a direction parallel to the housing wall 155, so that the first and second locking portions 122 and 121 also extend in a direction parallel to the housing wall 155.

The first locking portion 122 is hook-shaped forming a first notch, and the second locking portion 121 forms a second notch. In the locked position, the first protrusion 153 is inserted into the first notch to be hooked by the first locking portion 122, and the second protrusion 154 is inserted into the second notch such that the stop edge 126 of the second notch is located on the second moving path. Fig. 8 shows a perspective view of a part of the installation limiting mechanism according to fig. 2. As shown in fig. 8, the stop edge 126 may be inclined with respect to the extending direction of the second protrusion 154 to enlarge the second notch in a direction toward the second protrusion 154. Thus, the second notch is formed as a tapered opening. The stop edge 126 guides the insertion of the second tab 154 into the second notch and limits the second tab 154 to the extreme position to enhance the lock retention.

The scope of the present disclosure is defined not by the above-described embodiments but by the appended claims and their equivalents.

Claims (8)

1. An electrical cabinet, comprising:

The circuit breaker comprises a fixed contact, a moving contact, a brake separating button, a first protruding part and a second protruding part, wherein the brake separating button is configured to drive the first protruding part and the second protruding part to move when being actuated, and drive the moving contact to move through the first protruding part and the second protruding part so as to separate the moving contact from the fixed contact, thereby disconnecting a grounding loop of the electrical cabinet;

a door for opening and closing the cable chamber; and

A safety restraint mechanism comprising:

A door link connected to the door and translated in a first direction as the door is opened and closed to be positioned at a first door connection position corresponding to the opening of the door and a second door connection position corresponding to the closing of the door, the door link being provided with a guide; and

A locking member including a first locking portion, a second locking portion, and a mating guide, wherein the mating guide mates with the guide such that,

When the door link is in the first door connection position, the locking member is positioned in a locking position in which the first locking portion is on a first movement path of the first protrusion and the second locking portion is on a second movement path of the second protrusion to prevent the brake release button from being actuated,

When the door link is in the second door connection position, the lock is positioned in an unlocked position in which the first lock is clear of the first path of movement and the second lock is clear of the second path of movement to allow the release button to be actuated.

2. An electrical cabinet according to claim 1, wherein,

The safety restraint mechanism further includes a securing member, the circuit breaker includes a housing wall, the first projection and the second projection extend from the housing wall,

The securing member is secured to the housing wall of the circuit breaker, and the locking member is pivotally mounted to the securing member such that the locking member moves between the locked position proximate the circuit breaker and the unlocked position distal the circuit breaker.

3. An electrical cabinet according to claim 2, wherein,

The first direction is parallel to the housing wall, a pivot axis of the locking member is perpendicular to the first direction and parallel to the housing wall, and an extension direction of the first protrusion and the second protrusion is perpendicular to the housing wall.

4. An electrical cabinet according to claim 3, wherein,

The guide is a guide opening extending in a second direction that is inclined toward the circuit breaker with respect to the first direction, and the mating guide is a guide pin disposed in the guide opening.

5. The electrical cabinet of claim 4, wherein the electrical cabinet comprises a housing,

The locking piece includes a locking body and a tab protruding from and extending perpendicular to the locking body, the guide pin being connected to the tab, the locking body being in the form of a sheet extending parallel to the housing wall, the first and second locking portions being included in the locking body.

6. An electrical cabinet according to any one of claims 1-3, wherein,

The first locking portion is in a hook shape forming a first notch, and in the locking position, the first protruding portion is inserted into the first notch to be hooked by the first locking portion.

7. An electrical cabinet according to any one of claims 1-3, wherein,

The second locking portion forms a second notch into which the second protruding portion is inserted in the locked position, a stopper edge of the second notch being located on the second moving path, the stopper edge being inclined with respect to an extending direction of the second protruding portion to expand the second notch in a direction toward the second protruding portion.

8. An electrical cabinet according to any one of claims 1-3, wherein,

The first protrusion is fixed to the release button, and the second protrusion is movable relative to the release button.