CN215644202U

CN215644202U - Circuit breaker cabinet with interlocking mechanism

Info

Publication number: CN215644202U
Application number: CN202023329412.XU
Authority: CN
Inventors: 刘吉; 郭军辉
Original assignee: Schneider Electric Industries SAS
Current assignee: Schneider Electric Industries SAS
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2022-01-25
Anticipated expiration: 2030-12-31

Abstract

A circuit breaker cabinet having an interlock mechanism, the circuit breaker cabinet comprising a cable chamber door connected thereto; the circuit breaker cabinet further comprises a three-position mechanism and a circuit breaker mechanism housed within an interior of the circuit breaker cabinet; the cable chamber door acts on the three-position mechanism and the circuit breaker mechanism through the interlocking mechanism; when three conditions of grounding switch-on of the three-station mechanism, switch-on of the breaker mechanism and taking out of an operating handle from a grounding operating hole of the three-station mechanism are met simultaneously, the door of the cable chamber can be opened; and after the cable chamber door is opened, the three-station mechanism and the circuit breaker mechanism cannot be opened.

Description

Circuit breaker cabinet with interlocking mechanism

Technical Field

The present disclosure relates to a circuit breaker cabinet having an interlock mechanism.

Background

In the prior art, the interlocking mechanism of the cable chamber door is in transmission connection with the mechanism main transmission chain in the circuit breaker cabinet, and the movement of the interlocking mechanism of the cable chamber door can influence the movement of the mechanism main transmission chain. When the cable chamber door is opened to realize the interlocking logic, an operator needs to carry one hand to interlock the other hand to open the cable chamber door, the operation steps are complicated, and the risk of misoperation is increased.

In addition, the prior art also does not implement an interlock logic where the circuit breaker mechanism cannot be tripped after the cable compartment door is opened.

SUMMERY OF THE UTILITY MODEL

The circuit breaker cabinet according to the general idea of the present disclosure employs a three-position mechanism, a circuit breaker mechanism and a cabinet body structure, and therefore a brand new interlocking mechanism for a cable chamber door is designed for the circuit breaker cabinet, which ensures that the cable chamber door can be opened only when three conditions of grounding closing of the three-position mechanism, closing of the circuit breaker mechanism and taking out of an operating handle from a grounding operating hole are simultaneously satisfied, and the three-position mechanism and the circuit breaker mechanism cannot be opened after the cable chamber door is opened.

To address one or more deficiencies in the prior art, a circuit breaker cabinet having an interlock mechanism is presented according to one aspect of the present disclosure that includes a cable chamber door connected thereto.

The circuit breaker cabinet also includes a three-position mechanism and a circuit breaker mechanism housed within the interior of the circuit breaker cabinet.

The cable chamber door acts on the three-position mechanism and the circuit breaker mechanism through the interlocking mechanism.

And when three conditions of grounding switch-on of the three-station mechanism, switch-on of the breaker mechanism and taking out of the grounding operation hole of the three-station mechanism by the operating handle are met simultaneously, the door of the cable chamber can be opened. And after the cable chamber door is opened, the three-station mechanism and the circuit breaker mechanism cannot be opened.

According to the above aspect of the present disclosure, a driving plate is fixedly provided on the cable chamber door.

The interlocking mechanism includes a cable chamber door fixing plate, a holding plate, and a cable chamber door driving plate.

And a transmission plate pin and a transmission plate elongated hole are arranged on the transmission plate of the cable chamber door.

The drive plate is in pin fit with the drive plate.

The cable chamber door driving plate is connected to the cable chamber door fixing plate by a pin passing through the driving plate elongated hole.

The retention plate is pivotally connected to the cable chamber door securing plate.

According to the above aspects of the present disclosure, when the cable chamber door is not opened, the holding plate is in the holding plate unlocking position by the driving plate, and the cable chamber door driving plate is in the driving plate unlocking position by the driving plate.

In the opening process of the cable chamber door, the driving plate of the cable chamber door is driven by the driving plate to move upwards through the matching of the driving plate and the driving plate pin.

When the cable chamber door is opened, the retaining plate is located at a retaining plate retaining position under the action of the first return spring, the force borne by the retaining plate at the retaining plate retaining position exceeds a dead point, and at the moment, the retaining plate acts on the cable chamber door transmission plate, so that the cable chamber door transmission plate is retained at the transmission plate retaining position.

According to the above aspects of the present disclosure, the interlocking mechanism includes the lower straight moving plate and the link plate.

The connecting plate is connected with the cable chamber door transmission plate through a fastener.

And the lower straight moving plate is provided with a lower straight moving plate elongated hole.

The connecting plate is connected to the lower straight moving plate by a bolt passing through the elongated hole of the lower straight moving plate.

According to the above aspects of the present disclosure, the interlock mechanism includes a long shaft, a locking intermediate link plate, a short shaft, a locking connection plate, a breaker mechanism fixing plate, and a rotary shutter.

The locking web is connected to the lower straight moving plate by fasteners.

And a locking connecting plate elongated hole is formed in the locking connecting plate.

The locking intermediate yoke plate is connected to the locking connection plate by the stub shafts that fit in the locking connection plate elongated holes.

The locking middle yoke plate and the rotary baffle plate are connected with the circuit breaker mechanism fixing plate through the long shaft.

According to the above aspects of the disclosure, when the cable chamber door is not opened, the rotating baffle is in the rotating baffle unlocking position, at this time, the rotating baffle leaves the space above the straight moving plate of the opening button system in the breaker mechanism, and the straight moving plate of the opening button system can move upwards, so that the opening button can be pressed down, and the breaker mechanism can be opened.

When the cable chamber door is opened, the locking connecting plate moves upwards under the driving of the lower straight moving plate, the locking connecting plate drives the long shaft, the locking intermediate connecting plate, the short shaft and the rotating baffle plate to move, and finally the rotating baffle plate rotates to a rotating baffle plate holding position after the cable chamber door is opened and is held at the position under the action of the holding plate, when the rotating baffle plate is stressed to pass through a dead point at the rotating baffle plate holding position, the rotating baffle plate can block the straight moving plate of the opening button system from moving upwards, so that the opening button can not be pressed down, and the breaker mechanism can not open the brake.

According to the above aspects of the present disclosure, the interlock mechanism includes an upper straight moving plate, a breaker mechanism blocking plate, and an L-shaped support plate.

The lower translation plate is connected to the L-shaped support plate by fasteners.

The L-shaped support plate is connected to the upper straight moving plate by a fastener.

The circuit breaker mechanism shutter is attached to the upper straight moving plate by fasteners.

The lower straight moving plate and the upper straight moving plate are provided with the elongated holes for compensating deformation of the air box, so that the problem that the position of a mechanism and the like is uncertain due to deformation of the air box in the breaker cabinet can be well compensated, and the structure has strong adaptability.

According to the above aspects of the present disclosure, when the circuit breaker mechanism is in the open state, the spindle welding crank welded to the spindle of the circuit breaker mechanism is in the crank blocking position, the spindle welding crank blocks the circuit breaker mechanism damper from moving upward, and thus blocks the upper and lower linear motion plates from moving upward, and the cable chamber door cannot be opened.

A gap is reserved between the main shaft welding crank arm and the breaker mechanism baffle, so that the normal movement of the main shaft welding crank arm cannot be influenced.

Work as when circuit breaker mechanism is in the combined floodgate state, the welding is in on circuit breaker mechanism's the main shaft welding connecting lever is in connecting lever unblock position, this moment main shaft welding connecting lever yields the top space of circuit breaker mechanism baffle, circuit breaker mechanism baffle can the upward movement but receives the spacing of circuit breaker mechanism's limiting plate, and then go up straight movable plate with straight movable plate can the upward movement down, cable chamber door can be opened.

According to the above aspects of the present disclosure, the interlocking mechanism includes the fixed plate, the sliding plate 2, the support plate, the second return spring, and the ground shield.

The fixed plate is mounted to the three-position mechanism.

The grounding baffle is connected to an upper straight moving plate elongated hole arranged on the upper straight moving plate through a bolt.

The sliding plate is supported and guided by a support plate provided on the fixed plate and the fixed plate together, so that the sliding plate can move relative to the fixed plate and is mainly subjected to shear forces.

The second return spring acts between the slide plate and the fixed plate.

According to the above aspects of the present disclosure, when the three-position mechanism is in a grounding opening or isolation closing state, the three-position mechanism rotating shaft on the three-position mechanism is in a rotating shaft blocking position, and the three-position mechanism rotating shaft blocks the grounding baffle from moving upwards, so that the cable chamber door cannot be opened.

And a gap is reserved between the three-station mechanism rotating shaft and the grounding baffle, so that the normal movement of the three-station mechanism rotating shaft is not influenced.

When the three-station mechanism is in a grounding closing state, the three-station mechanism rotating shaft on the three-station mechanism is located at a rotating shaft unlocking position, at the moment, the three-station mechanism rotating shaft gives way to the space above the grounding baffle, and the grounding baffle can move upwards, so that the cable chamber door can be opened.

According to the above aspects of the present disclosure, when the operating handle is not inserted into the ground operation hole, the ground operation hole rotating shutter assembly on the three-position mechanism is in the shutter assembly blocking position under the action of the third return spring, the sliding plate follows the ground operation hole rotating shutter assembly under the action of the third return spring and is in the sliding plate unlocking position, the sliding plate gives way to the upper space of the upper linear motion plate, and the upper linear motion plate can move upward, so that the cable chamber door can be opened.

When the operating handle is inserted into the grounding operating hole, the grounding operating hole rotating baffle plate assembly on the three-station mechanism is in a non-blocking position of the baffle plate assembly under the action of the operating handle, the sliding plate following the grounding operating hole rotating baffle plate assembly is in a blocking position of the sliding plate, and the sliding plate can block the upper straight moving plate from moving upwards, so that the cable chamber door cannot be opened.

And a gap is reserved between the sliding plate and the upper linear motion plate, so that the normal motion of the upper linear motion plate is not influenced.

When the cable chamber door is opened, the upper direct-acting plate is kept at a direct-acting plate blocking position under the action of the retaining plate, and the upper direct-acting plate can block the sliding plate from moving rightwards, so that the rotating baffle plate assembly of the grounding operation hole cannot rotate clockwise, the grounding operation hole is blocked, an operation handle cannot be inserted, and the three-station mechanism cannot be operated.

The interlocking mechanism according to the disclosure is designed with a unique holding structure, a brand new design structure with gaps between the interlocking part and the main transmission chain part of the three-station mechanism and the circuit breaker mechanism, a brand new design structure for transferring stress positions, a design structure for passing dead points, a compensation structure design capable of compensating deformation of the gas tank and an overall design structure capable of realizing all logics only by operating a cable chamber door are developed, reliable grounding of the circuit breaker cabinet is ensured, and personal safety of overhaul and maintenance personnel is ensured.

So that the manner in which the disclosure is made in detail herein can be better understood, and in which the contributions to the art may be better appreciated, the disclosure has been summarized rather broadly. There are, of course, embodiments of the disclosure that will be described below and which will form the subject matter of the claims appended hereto.

As such, those skilled in the art will appreciate that the conception upon which this disclosure is based may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present disclosure. It is important, therefore, that the appended claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present disclosure.

Drawings

The present disclosure will be better understood and its advantages will become more apparent to those skilled in the art from the following drawings. The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations and are not intended to limit the scope of the present disclosure.

Fig. 1 shows a front view of a circuit breaker cabinet according to the present disclosure;

FIG. 2 illustrates a cross-sectional view taken along line B-B of FIG. 1 in accordance with the present disclosure;

FIG. 3 shows a plan view of an interlock mechanism according to the present disclosure from one perspective;

FIG. 4 shows a plan view of an interlock mechanism according to the present disclosure from another perspective;

FIG. 5 illustrates a cross-sectional view taken along line C-C of FIG. 3 according to the present disclosure;

fig. 6 shows the state of the holding device when the cable chamber door is not opened;

fig. 7 shows the state of the holding device when the cable chamber door is opened;

fig. 8 shows a state of the cable compartment door interlock mechanism at the circuit breaker mechanism when the cable compartment door is not opened;

fig. 9 illustrates a state of the cable compartment door interlock mechanism at the breaker mechanism when the cable compartment door is opened;

FIG. 10 is a view showing a relative position state of a breaker mechanism barrier and a spindle welding crank arm when the breaker mechanism is opened;

FIG. 11 illustrates a relative position of a damper of the circuit breaker mechanism with respect to a welding crank of the spindle when the circuit breaker mechanism is closed;

fig. 12 shows the relative position state of the grounding baffle and the rotating shaft of the three-position mechanism when the three-position mechanism is in grounding opening or isolation closing;

fig. 13 shows a relative position state of the grounding baffle and the rotating shaft of the three-position mechanism when the three-position mechanism is grounded and switched on;

fig. 14 shows a state in which the slide plate is interlocked with the ground operation hole rotating shutter assembly when the operation handle is not inserted;

FIG. 15 is an enlarged view of circled portion A in FIG. 5, showing that the slide plate does not block the movement of the upper straight movable plate when the operating handle is not inserted;

FIG. 16 shows the state of the slide plate in linkage with the ground engaging operation hole rotating shutter assembly when the operation handle is inserted;

FIG. 17 shows the slide plate blocking the movement of the upper straight movable plate when the operating handle is inserted;

fig. 18 shows that when the cable chamber door is opened, the upper translational plate blocks the movement of the sliding plate, thereby disabling the ground operating hole rotary shutter assembly from rotating clockwise and blocking the ground operating hole, which disables the insertion of the operating handle.

Detailed Description

Specific embodiments according to the present disclosure will be described below with reference to fig. 1 to 18.

According to one embodiment of the present disclosure, as shown in fig. 1 and 2, a circuit breaker cabinet with an interlock mechanism is presented that includes a cable chamber door 24 connected thereto.

The circuit breaker cabinet further comprises a three-position mechanism 25, a circuit breaker mechanism 26 and an air box 27 housed in the interior of the frame 28 of the circuit breaker cabinet.

The cable chamber door 24 acts on the three-position mechanism 25 and the circuit breaker mechanism through the interlocking mechanism.

The cable chamber door 24 can be opened only when three conditions of grounding closing of the three-position mechanism 25, closing of the breaker mechanism 26 and taking out of the operating handle from the grounding operating hole of the three-position mechanism 25 are simultaneously met, and after the cable chamber door 24 is opened, the three-position mechanism 25 and the breaker mechanism 26 cannot be opened.

According to the above-described embodiment of the present disclosure, as shown in fig. 3 to 7, the driving plate 22 is fixedly provided on the cable chamber door 24.

The interlocking mechanism includes a cable chamber door fixing plate 20, a holding plate 21, and a cable chamber door driving plate 18.

A driving plate pin 18-1 and a driving plate elongated hole 18-2 are provided on the cable chamber door driving plate 18.

The drive plate 22 mates with the drive plate pin 18-1.

The cable chamber door actuator plate 18 is connected to the cable chamber door retainer plate 20 by a pin 19 that passes through the actuator plate elongated aperture 18-2.

The holding plate 21 is pivotably connected to the cable chamber door fixing plate 20.

According to the above-described various embodiments of the present disclosure, as shown in fig. 6, when the cable chamber door 24 is not opened, the holding plate 21 is in the holding plate unlocking position by the driving plate 22, and the cable chamber door driving plate 18 is in the driving plate unlocking position by the driving plate 22.

During the opening process of the cable chamber door 24, the cable chamber door driving plate 18 moves upward under the driving of the driving plate 22 by the cooperation of the driving plate 22 and the driving plate pin 18-1.

When the cable chamber door 24 is opened, as shown in fig. 7, the holding plate 21 is in the holding plate holding position under the action of the first return spring 4-1, the force applied to the holding plate 21 in the holding plate holding position exceeds the dead point, and at this time, the holding plate 21 acts on the cable chamber door transmission plate 18, so that the cable chamber door transmission plate 18 is held in the transmission plate holding position.

The over-dead-center design in the cable chamber door interlock as described above reduces the design strength of the force receiving member (holding plate 21) while ensuring the holding function, enabling the force receiving member to be made simpler and more economical and the design structure of its unique holding device (holding plate 21) is not only simple in structure but also safe and reliable.

According to the above-described various embodiments of the present disclosure, as shown in fig. 3, the interlocking mechanism includes the lower straight moving plate 16 and the coupling plate 17.

The connecting plate 17 and the cable chamber door driving plate 18 are connected together by a fastener.

The lower straight moving plate 16 is provided with a lower straight moving plate elongated hole 16-1.

The connecting plate 17 is connected to the lower translational plate 16 by a bolt passing through the lower translational plate elongated hole 16-1.

According to the above-described various embodiments of the present disclosure, as shown in fig. 8 and 9, the interlocking mechanism includes a long shaft 10, a locking intermediate link plate 11, a short shaft 12, a locking connection plate 13, a breaker mechanism fixing plate 14, and a rotary shutter 15.

The locking connection plate 13 is connected to the lower straight moving plate 16 by fasteners.

The locking connecting plate 13 is provided with a locking connecting plate elongated hole 13-1.

The locking intermediate yoke plate 11 is connected to the locking connection plate 13 by the stub shafts 12 fitted in the locking connection plate elongated holes 13-1.

The latching intermediate yoke plate 11 and the rotating barrier 15 are connected to the breaker mechanism mounting plate 14 by the long shaft 10.

According to the above embodiments of the present disclosure, as shown in fig. 8, when the cable chamber door 24 is not opened, the rotary shutter 15 is in the rotary shutter unlocking position, and at this time, the rotary shutter 15 opens the space above the trip button system straight movable plate 31 in the circuit breaker mechanism 26, and the trip button system straight movable plate 31 can move upward, so that the trip button can be pressed, and the circuit breaker mechanism 26 can trip.

When the cable chamber door 24 is opened, as shown in fig. 9, the locking connecting plate 13 moves upward under the action of the lower straight moving plate 16, the locking connecting plate 11 in turn moves the long shaft 10, the locking intermediate link plate 11, the short shaft 12 and the rotating baffle 15, and finally the rotating baffle 15 rotates to a rotating baffle holding position after the cable chamber door 24 is opened and is held at the position under the action of the holding plate 21, when the rotating baffle 15 is forced to pass a dead point at the rotating baffle holding position, the rotating baffle 15 blocks the straight moving plate 31 of the tripping button system to move upward, so that the tripping button cannot be pressed, and the circuit breaker mechanism 26 cannot trip.

Likewise, the over-dead-center design in the cable chamber door interlock as described above reduces the design strength of the force-receiving member (the rotating flap 15) while ensuring the retention function, enabling the force-receiving member to be made simpler and more economical.

According to the above various embodiments of the present disclosure, the interlock mechanism includes the upper linear movable plate 6, the breaker mechanism shutter 8, and the L-shaped support plate 9.

The lower straight moving plate 16 is connected to the L-shaped support plate 9 by fasteners.

The L-shaped support plate 9 is connected to the upper translational plate 6 by fasteners.

The breaker mechanism shutter 8 is attached to the upper translational plate 6 by fasteners.

The lower direct-acting plate 16 and the upper direct-acting plate 6 are provided with elongated holes for compensating deformation of the air box, so that the problem of position uncertainty of mechanisms and the like caused by deformation of the air box 27 in the breaker cabinet can be well compensated, and the structure has strong adaptability.

According to the above embodiments of the present disclosure, as shown in fig. 10, when the circuit breaker mechanism 26 is in the open state, the spindle welding crank 30 welded to the spindle 26-1 of the circuit breaker mechanism 26 is in the crank blocking position, the spindle welding crank 30 blocks the circuit breaker mechanism shutter 8 from moving upward, and thus blocks the upper linear motion plate 6 and the lower linear motion plate 16 from moving upward, and the cable chamber door 24 cannot be opened.

A gap is formed between the main shaft welding crank arm 30 and the breaker mechanism baffle 8, so that the normal movement of the main shaft welding crank arm 30 is not influenced.

When the circuit breaker mechanism 26 is in a closing state, as shown in fig. 11, the spindle welding connecting lever 30 is welded on the spindle 26-1 of the circuit breaker mechanism 26 and located at a connecting lever unlocking position, at this time, the spindle welding connecting lever 30 lets out the upper space of the circuit breaker mechanism baffle 8, the circuit breaker mechanism baffle 8 can move upwards but is limited by the limiting plate 7 of the circuit breaker mechanism 26, and then the upper straight moving plate 6 and the lower straight moving plate 16 can move upwards, and the cable chamber door 24 can be opened.

The design structure in the cable chamber door interlock as described above that does not affect the small clearance of the main drive chain (the main shaft welding crank arm 30 and the main shaft 26-1 of the breaker mechanism 26) does not have any effect on the normal movement of the main drive chain of the mechanism, i.e., the function of the interlock itself is achieved and the performance of the mechanism itself is guaranteed.

According to the above-described respective embodiments of the present disclosure, as shown in fig. 12 to 18, the interlocking mechanism includes the fixed plate 1, the sliding plate 2, the support plate 3, the second return spring 4-2, and the ground shield 5.

The fixed plate 1 is installed on the three-station mechanism (25) of the circuit breaker cabinet.

The ground baffle 5 is connected to an upper translation plate elongated hole 6-1 provided on the upper translation plate 6 by a bolt.

The sliding plate 2 is supported and guided by a support plate 3 provided on the fixed plate 1 in conjunction with the fixed plate 1, so that the sliding plate 2 can move relative to the fixed plate 1 and is subjected mainly to shear forces.

The second return spring 4-2 acts between the slide plate 2 and the fixed plate 1.

According to the above embodiments of the present disclosure, as shown in fig. 12, when the three-position mechanism 25 is in the ground disconnecting or disconnecting switching state, the three-position mechanism rotating shaft 23 on the three-position mechanism 25 is in the rotating shaft blocking position, and the three-position mechanism rotating shaft 23 blocks the ground baffle 5 from moving upwards, so that the cable chamber door 24 cannot be opened.

A gap is formed between the three-position mechanism rotating shaft 23 and the grounding baffle 5, so that the normal movement of the three-position mechanism rotating shaft 23 is not influenced.

When the three-position mechanism 25 is in a grounding and closing state, as shown in fig. 13, the three-position mechanism rotating shaft 23 on the three-position mechanism 25 is in a rotating shaft unlocking position, at this time, the three-position mechanism rotating shaft 23 gives way to the space above the grounding baffle 5, and the grounding baffle 5 can move upwards, so that the cable chamber door 24 can be opened.

The design structure in the cable chamber door interlock as described above, which does not affect the small gap of the main transmission chain (three-position mechanism rotating shaft 23), has no influence on the normal movement of the main transmission chain of the mechanism, and not only the function of the interlock itself is realized, but also the performance of the mechanism itself is ensured.

According to the above-mentioned embodiments of the present disclosure, as shown in fig. 14, when the operating handle is not inserted into the ground operating hole, the ground operating hole rotary shutter assembly 29 on the three-position mechanism 25 is in the shutter assembly blocking position under the action of the third return spring 4-3, as shown in fig. 15, the sliding plate 2 follows the ground operating hole rotary shutter assembly 29 under the action of the third return spring 4-3 and is in the sliding plate unlocking position, the sliding plate 2 leaves the space above the upper linear motion plate 6, and the upper linear motion plate 6 can move upward, so that the cable chamber door 24 can be opened.

When the operating handle is inserted into the ground access opening, as shown in fig. 16, the ground access opening rotating baffle plate assembly 29 on the three-position mechanism 25 is in the baffle plate assembly non-blocking position under the action of the operating handle, as shown in fig. 17, the sliding plate 2 following the ground access opening rotating baffle plate assembly 29 is in the sliding plate blocking position, and the sliding plate 2 blocks the upper linear motion plate 6 from moving upward, so that the cable chamber door 24 cannot be opened.

There is a gap between the sliding plate 2 and the upper linear motion plate 6 so as not to affect the normal motion of the upper linear motion plate 6.

The design structure in the cable chamber door interlock as described above, which does not affect the small clearance of the main drive chain (slide plate 2), has no effect on the normal movement of the main drive chain of the mechanism, i.e. the function of the interlock itself is achieved and the performance of the mechanism itself is guaranteed.

When the cable chamber door 24 is opened, as shown in fig. 18, the upper translational plate 6 is held in the translational plate blocking position by the holding plate 21, and the upper translational plate 6 blocks the sliding plate 2 from moving to the right, so that the ground operating hole rotary shutter assembly 29 cannot rotate clockwise, thereby blocking the ground operating hole, which makes the operating handle not to be inserted, and thus the three-position mechanism 25 cannot be operated.

The design structure of force transfer in the cable chamber door interlock as described above solves the problem that the rotating baffle plate assembly 29 (plastic piece) of the grounding operation hole has low strength and is not suitable for receiving strong force, so that the interlock is safer, more reliable and more economical.

The basic principles of cable chamber door interlocking according to the above-described embodiments of the present disclosure are summarized as follows:

cable chamber door 24 openable

The driving plate 22 is fixed on the cable chamber door 24, and when the three-position mechanism 25 is in ground closing, the breaker mechanism 26 is in ground closing, and the operating handle is taken out from the ground operating hole of the three-position mechanism 25, the three-position mechanism rotating shaft 23, the main shaft welding connecting lever 30 and the sliding plate 2 respectively leave the space above the ground baffle 5, the breaker mechanism baffle 8 and the upper straight moving plate 6, so that the two can move upwards. When the cable chamber door 24 is lifted up by hand, the driving plate 22 fixed to the cable chamber door 24 moves the entire assembly (the ground shield 5, the upper translational plate 6, the breaker mechanism shield 8, the L-shaped support plate 9, the lower translational plate 16, the connecting plate 17, and the cable chamber door transmission plate 19 are fixed together by a fastener such as a bolt or a rivet, thereby forming an entire assembly) upward, and the cable chamber door 24 can be opened. When the cable chamber door 24 is opened, the retaining plate 21 is reset by the first reset spring 4-1 to retain the whole assembly at the lifted position, and at the same time, the locking connecting plate 13 fixed on the whole assembly is driven to move upwards in the lifting process of the whole assembly, the locking connecting plate 13 drives the short shaft 12, the locking middle connecting plate 11, the long shaft 10 and the rotating baffle 15 to move together, and finally the rotating baffle 15 rotates to the vertical position and blocks the straight plate 31 of the opening button system in the opening button system (as shown in fig. 9, a small gap is formed between the rotating baffle 15 and the straight plate 31 of the opening button system), so that the straight plate 31 of the opening button system cannot move upwards, the opening button cannot be operated, and the circuit breaker mechanism 26 is retained at the closing position. When the integral assembly is kept at the ascending position, the upper straight moving plate 6 in the integral assembly can block the sliding plate 2 which moves left and right (under the action of the second return spring 4-2) along with the grounding operation hole rotating baffle plate assembly 29 to move rightwards (as shown in fig. 16), so that the grounding operation hole rotating baffle plate assembly 29 cannot rotate, the grounding operation hole is blocked by the grounding operation hole rotating baffle plate assembly 29, and an operation handle cannot be inserted for opening the brake; when the cable chamber door 24 is hung again, the driving plate 22 fixed on the cable chamber door 24 pushes the retaining plate 21 to rotate anticlockwise, so that the retaining mechanism of the integral assembly is unlocked, the integral assembly is driven by the cable chamber door 24 to move downwards together until the cable chamber door 24 is installed in place, and the previous state is recovered.

Cable chamber door 24 cannot be opened

(1) When the three-position mechanism 25 is not in the grounding switch-on position (in the isolation position or the switch-on position), the breaker mechanism 26 is in the switch-on position, and the operating handle is taken out of the grounding operating hole, the three-position mechanism rotating shaft 23 will rotate to the position shown in fig. 12, the grounding baffle 5 in the whole assembly will be blocked by the three-position mechanism rotating shaft 23 (a small gap is formed between the grounding baffle 5 and the three-position mechanism rotating shaft 23), so that the grounding baffle 5 cannot move upwards, and the cable chamber door 24 cannot be opened.

(2) When the three-position mechanism 25 is at the grounding switch-on position, the breaker mechanism 26 is at the switch-off position and the operating handle is taken out from the grounding operating hole, the spindle welding connecting lever 30 welded on the spindle of the breaker mechanism 26 rotates to the position shown in fig. 10, the breaker mechanism baffle 8 in the whole assembly is blocked by the spindle welding connecting lever 30 (a small gap is formed between the breaker mechanism baffle 8 and the spindle welding connecting lever 30), so that the breaker mechanism baffle 8 cannot move upwards, and the cable chamber door 24 cannot be opened.

(3) When the three-position mechanism 25 is at the ground-connected switching-on position, the circuit breaker mechanism 26 is at the switching-on position and the operating handle is not taken out of the ground-connected operating hole, the sliding plate 2 moves to the position shown in fig. 17 with the rotation of the ground-connected operating hole rotating baffle plate assembly 29, the upper linear motion plate 6 in the whole assembly is blocked by the sliding plate 2 (a small gap is formed between the upper linear motion plate 6 and the sliding plate 2) so that it cannot move upwards, and therefore the cable chamber door 24 cannot be opened.

(4) When the three-position mechanism 25 is not in the ground-connected position (in the isolated position or the switched-on position), the circuit breaker mechanism 26 is in the switched-off position, and the operating handle is not taken out of the ground-connected operating hole, the ground baffle 5, the circuit breaker mechanism baffle 8, and the upper translation plate 6 are respectively blocked by the three-position mechanism rotating shaft 23, the main shaft welding crank arm 30, and the sliding plate 2, so that they cannot move upward, and the cable chamber door 24 cannot be opened.

That is, the cable chamber door 24 can be opened only when three conditions of the three-position mechanism 25 being simultaneously satisfied during ground closing, the breaker mechanism 26 being closed and the operating handle being taken out from the ground operating hole are satisfied, and the cable chamber door 24 cannot be opened as long as one condition is not satisfied.

To sum up, a cable chamber door interlock according to the present disclosure only requires operation of the cable chamber door to achieve all the logic of the cable chamber door interlock. The structural design does not need additional auxiliary operation, greatly simplifies the operation of operators and reduces the risk of misoperation.

The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the embodiments to the precise form disclosed. Modifications and variations are possible in light of the above disclosure or may be acquired from practice of the embodiments.

Even though particular combinations of features are recited in the claims and/or disclosed in the specification, these combinations are not intended to limit the disclosure of the various embodiments. In fact, many of these features may be combined in ways not specifically recited in the claims and/or disclosed in the specification. Although each dependent claim listed below may depend directly on only one claim, the disclosure of various embodiments includes each dependent claim in combination with every other claim in the claim set.

No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. In addition, as used herein, the articles "a" and "an" are intended to include one or more items, and may be used interchangeably with "one or more". Further, as used herein, the article "the" is intended to include the incorporation of one or more items referenced by the article "the" and may be used interchangeably with "one or more". Further, as used herein, the term "set" is intended to include one or more items (e.g., related items, unrelated items, combinations of related and unrelated items, etc.) and may be used interchangeably with "one or more". Where only one item is intended, the phrase "only one item" or similar language is used. In addition, as used herein, the term "having," variants thereof, and the like are intended to be open-ended terms. Further, the phrase "based on" is intended to mean "based, at least in part, on" unless explicitly stated otherwise. In addition, as used herein, the term "or" when used in series is intended to be inclusive and may be used interchangeably with "and/or" unless specifically stated otherwise (e.g., if used in conjunction with "or" only one of ").

Claims

1. A circuit breaker cabinet with an interlock mechanism,

the circuit breaker cabinet includes a cable compartment door (24) connected thereto;

the circuit breaker cabinet further comprising a three-position mechanism (25) and a circuit breaker mechanism (26) housed within an interior of the circuit breaker cabinet;

the cable chamber door (24) acts on the three-position mechanism (25) and the circuit breaker mechanism through the interlocking mechanism;

the cable chamber door (24) can be opened only when three conditions of grounding closing of the three-position mechanism (25), closing of the breaker mechanism (26) and taking out of an operating handle from a grounding operating hole of the three-position mechanism (25) are met simultaneously; and is

After the cable chamber door (24) is opened, the three-position mechanism (25) and the circuit breaker mechanism (26) cannot be opened.

2. Circuit breaker cabinet according to claim 1,

a drive plate (22) is fixedly arranged on the cable chamber door (24);

the interlocking mechanism comprises a cable chamber door fixing plate (20), a holding plate (21) and a cable chamber door transmission plate (18);

a transmission plate pin (18-1) and a transmission plate elongated hole (18-2) are arranged on the cable chamber door transmission plate (18);

the drive plate (22) cooperates with the drive plate pin (18-1);

the cable compartment door driver plate (18) is connected to the cable compartment door fixing plate (20) by a pin (19) passing through the driver plate elongated hole (18-2);

the holding plate (21) is pivotably connected to the cable chamber door fixing plate (20).

3. Circuit breaker cabinet according to claim 2,

when the cable chamber door (24) is not opened, the holding plate (21) is in a holding plate unlocking position under the action of the driving plate (22), and the cable chamber door transmission plate (18) is in a transmission plate unlocking position under the action of the driving plate (22);

in the opening process of the cable chamber door (24), the cable chamber door transmission plate (18) moves upwards under the driving of the driving plate (22) through the matching of the driving plate (22) and the transmission plate pin (18-1);

when the cable chamber door (24) is opened, the holding plate (21) is located at a holding plate holding position under the action of the first return spring (4-1), the force borne by the holding plate (21) at the holding plate holding position exceeds a dead point, and at the moment, the holding plate (21) acts on the cable chamber door transmission plate (18), so that the cable chamber door transmission plate (18) is held at the transmission plate holding position.

4. Circuit breaker cabinet according to claim 3,

the interlocking mechanism comprises a lower straight moving plate (16) and a connecting plate (17);

the connecting plate (17) and the cable chamber door transmission plate (18) are connected together through a fastener;

a lower straight moving plate elongated hole (16-1) is formed in the lower straight moving plate (16);

the connecting plate (17) is connected to the lower straight moving plate (16) by a bolt passing through the lower straight moving plate elongated hole (16-1).

5. Circuit breaker cabinet according to claim 4,

the interlocking mechanism comprises a long shaft (10), a locking middle connecting plate (11), a short shaft (12), a locking connecting plate (13), a circuit breaker mechanism fixing plate (14) and a rotary baffle (15);

the locking connection plate (13) is connected to the lower straight moving plate (16) through a fastener;

a locking connecting plate elongated hole (13-1) is formed in the locking connecting plate (13);

the locking intermediate yoke plate (11) is connected to the locking connection plate (13) by the stub shaft (12) fitted in the locking connection plate elongated hole (13-1);

the locking intermediate yoke plate (11) and the rotary baffle plate (15) are connected with the circuit breaker mechanism fixing plate (14) through the long shaft (10).

6. Circuit breaker cabinet according to claim 5,

when the cable chamber door (24) is not opened, the rotary baffle (15) is in a rotary baffle unlocking position, at the moment, the rotary baffle (15) gives way to the space above a straight movable plate (31) of a tripping button system in the breaker mechanism (26), the straight movable plate (31) of the tripping button system can move upwards, so that a tripping button can be pressed down, and the breaker mechanism (26) can be tripped;

when the cable chamber door (24) is opened, the locking connecting plate (13) moves upwards under the driving of the lower straight moving plate (16), the locking connecting plate (13) drives the long shaft (10), the locking intermediate connecting plate (11), the short shaft (12) and the rotating baffle (15) to move, and finally the rotating baffle (15) rotates to a rotating baffle retaining position after the cable chamber door (24) is opened and is retained at the position under the action of the retaining plate (21), when the rotating baffle (15) is stressed at the rotating baffle retaining position, the rotating baffle (15) blocks the straight moving plate (31) of the opening button system to move upwards, so that an opening button cannot be pressed down, and the breaker mechanism (26) cannot open.

7. Circuit breaker cabinet according to claim 6,

the interlocking mechanism comprises an upper straight moving plate (6), a breaker mechanism baffle (8) and an L-shaped supporting plate (9);

the lower straight moving plate (16) is connected to the L-shaped support plate (9) by fasteners;

the L-shaped supporting plate (9) is connected to the upper straight moving plate (6) through a fastener;

the circuit breaker mechanism shutter (8) is attached to the upper straight moving plate (6) by fasteners.

8. Circuit breaker cabinet according to claim 7,

when the breaker mechanism (26) is in a switching-off state, a main shaft welding crank arm (30) welded on a main shaft of the breaker mechanism (26) is in a crank arm blocking position, the main shaft welding crank arm (30) can block a breaker mechanism baffle (8) from moving upwards, further block the upper straight moving plate (6) and the lower straight moving plate (16) from moving upwards, and the cable chamber door (24) cannot be opened;

a gap is reserved between the main shaft welding crank arm (30) and the breaker mechanism baffle (8), so that the normal movement of the main shaft welding crank arm (30) is not influenced;

work as when circuit breaker mechanism (26) is in the combined floodgate state, the welding is in on the main shaft of circuit breaker mechanism (26) main shaft welding connecting lever (30) are in connecting lever unblock position, this moment main shaft welding connecting lever (30) give way the top space of circuit breaker mechanism baffle (8), circuit breaker mechanism baffle (8) can the upward movement but receive the spacing of limiting plate (7) of circuit breaker mechanism (26), and then go up directly move board (6) with lower straight movable plate (16) can the upward movement, cable chamber door (24) can be opened.

9. Circuit breaker cabinet according to claim 8,

the interlocking mechanism comprises a fixed plate (1), a sliding plate (2), a supporting plate (3), a second return spring (4-2) and a grounding baffle (5);

the fixed plate (1) is mounted to the three-position mechanism (25);

the grounding baffle (5) is connected to an upper straight moving plate elongated hole (6-1) arranged on the upper straight moving plate (6) through a bolt;

the sliding plate (2) is supported and guided by a support plate (3) provided on the fixed plate (1) and the fixed plate (1) together, so that the sliding plate (2) can move relative to the fixed plate (1) and is subjected only to shear forces;

the second return spring (4-2) acts between the sliding plate (2) and the fixed plate (1).

10. Circuit breaker cabinet according to claim 9,

when the three-position mechanism (25) is in a grounding switching-off or isolation switching-on state, a three-position mechanism rotating shaft (23) on the three-position mechanism (25) is in a rotating shaft blocking position, and the three-position mechanism rotating shaft (23) can block the grounding baffle (5) from moving upwards, so that the cable chamber door (24) cannot be opened;

a gap is reserved between the three-position mechanism rotating shaft (23) and the grounding baffle (5), so that the normal movement of the three-position mechanism rotating shaft (23) cannot be influenced;

when three station mechanism (25) are in ground connection combined floodgate state, on three station mechanism (25) three station mechanism pivot (23) are in pivot unblock position, at this moment three station mechanism pivot (23) give way the top space of ground connection baffle (5), ground connection baffle (5) can the upward movement, thereby make cable chamber door (24) can be opened.

11. Circuit breaker cabinet according to claim 9,

when the operating handle is not inserted into the grounding operating hole, a grounding operating hole rotating baffle plate assembly (29) on the three-station mechanism (25) is in a baffle plate assembly blocking position under the action of a third return spring (4-3), the sliding plate (2) follows the grounding operating hole rotating baffle plate assembly (29) under the action of the third return spring (4-3) and is in a sliding plate unlocking position, the sliding plate (2) gives way to the space above the upper straight moving plate (6), and the upper straight moving plate (6) can move upwards, so that the cable chamber door (24) can be opened;

when an operating handle is inserted into the grounding operating hole, a grounding operating hole rotating baffle plate assembly (29) on the three-position mechanism (25) is in a baffle plate assembly non-blocking position under the action of the operating handle, the sliding plate (2) following the grounding operating hole rotating baffle plate assembly (29) is in a sliding plate blocking position, and the sliding plate (2) can block the upper straight moving plate (6) from moving upwards, so that the cable chamber door (24) cannot be opened;

a gap is reserved between the sliding plate (2) and the upper linear motion plate (6), so that the normal motion of the upper linear motion plate (6) is not influenced;

when the cable chamber door (24) is opened, the upper direct-acting plate (6) is kept in a direct-acting plate blocking position under the action of the retaining plate (21), the upper direct-acting plate (6) can block the sliding plate (2) from moving rightwards, so that the grounding operation hole rotating baffle plate assembly (29) cannot rotate clockwise, the grounding operation hole is blocked, an operation handle cannot be inserted, and therefore the three-position mechanism (25) cannot be operated.