CN209844641U - Interlocking mechanism of double-power switching device - Google Patents

Abstract

An interlocking mechanism of a double-power switching device comprises two circuit breakers, wherein an operating handle capable of being pulled up and down is arranged on the front side of each circuit breaker, a fixed support plate is arranged in front of the front sides of the two circuit breakers, an interlocking plate is transversely and movably arranged behind the support plate, fork openings for forking the operating handle are respectively formed in the edges of the left side and the right side of the interlocking plate, a left pin and a right pin are fixedly arranged on the support plate, a left long hole and a right long hole are formed in the interlocking plate, and the left pin and the right pin of the support plate respectively penetrate through the left long hole and the right long hole; the lock is also provided with a lock, the lock comprises a lock shell and a lock core, and the lock shell is fixedly connected with the interlocking plate; the rear of the interlocking plate is also provided with a strip-shaped lock tongue piece which rotates along with the lock core, the left side of the lock tongue piece is provided with two notches with vertical opening directions, and the right side of the lock tongue piece is provided with two notches. The utility model discloses can realize the interlocking function of two circuit breakers, the structure is ingenious, and is easy and simple to handle, the good reliability.

Description

Interlocking mechanism of double-power switching device

Technical Field

The utility model belongs to the technical field of distribution equipment, concretely relates to dual supply auto-change over device's interlocking device.

Background

In order to ensure that a power distribution system can continuously supply power for a long time, a double-path incoming line power supply is usually arranged, so that when one incoming line power supply loses power, the other standby incoming line power supply supplies power.

The two incoming line power supplies need to be respectively provided with circuit breakers, and each circuit breaker controls the on-off of the corresponding incoming line power supply. Each circuit breaker is provided with an operating handle which can be pulled up and down, the operating handle is forwards exposed out of the front side of the circuit breaker, and when the circuit breaker is in a closing state, the operating handle is pulled up to a closing position; when the breaker is in an opening state, the control handle is pulled downwards to an opening position.

Obviously, in order to ensure system safety, only one of the two incoming line power supplies can be enabled at the same time, and the two incoming line power supplies are strictly prohibited to be simultaneously switched on, that is, at most one circuit breaker can be in a switching-on state and cannot be switched on at any time under any condition, so that a reliable interlocking relationship must be formed between the two circuit breakers respectively used for controlling the two incoming line power supplies, and the interlocking mechanism of the dual power supply switching device must be applied to the interlocking mechanism.

The interlocking requirement of the interlocking mechanism of the dual-power switching device is that the first circuit breaker and the second circuit breaker can be in an open state at the same time, or the control handles of the two circuit breakers can rotate to an open position at the same time, the second circuit breaker and the second circuit breaker can not be in a closed state at the same time, or the control handles of the two circuit breakers can not rotate to a closed position at the same time, and the open-close state of the two circuit breakers can be converted into an open state of the first circuit breaker and a closed state of the second circuit breaker through certain operation, or vice versa.

The traditional interlocking device of the dual-power incoming line circuit breaker generally adopts electronic components for interlocking, but the electronic components have high cost and poor reliability and are easy to break down; when the electronic element has a fault, the interlocking system cannot work normally, namely, the possibility that two circuit breakers are switched on by mistake at the same time exists, and therefore the safety of a power supply system is influenced. Later, some mechanical interlocking mechanisms are designed successively, but the existing mechanical interlocking mechanisms are complex in structure or poor in reliability, and some mechanical interlocking mechanisms can be operated even by unauthorized people, so that potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned shortcoming and provide a dual power switching device's interlocking device, its structure is ingenious, and is easy and simple to handle, the good reliability.

The purpose can be realized according to the following scheme:

an interlocking mechanism of a double-power switching device comprises two paths of power supplies, wherein each path of power supply is provided with a circuit breaker, the two circuit breakers are arranged side by side at the left and right and are separated by a transverse distance, and the front side of each circuit breaker is provided with an operating handle which can be pulled up and down; when the control handle is pulled upwards to a switch-on position, the corresponding circuit breaker is switched on, and when the control handle is pulled downwards to a switch-off position, the corresponding circuit breaker is switched off; the opening positions of the control handles of the two circuit breakers are in the same vertical position; the front sides of the two circuit breakers are provided with fixed support plates, the support plates are provided with two handle holes for the control handles of the left circuit breaker and the right circuit breaker to pass through, the rear sides of the support plates are transversely and movably provided with interlocking plates, the left end sections of the interlocking plates are positioned in front of the left circuit breaker, the right end sections of the interlocking plates are positioned in front of the right circuit breaker, and the transverse width of the interlocking plates is larger than the transverse clear distance of the two control handles;

fork openings for forking the control handle are respectively formed in the edges of the left side and the right side of the interlocking plate, the fork opening on the edge of the left side faces the left side, the fork opening on the edge of the right side faces the right side, and the vertical positions of the fork openings are correspondingly matched with the control handle in the brake separating position;

the bracket plate is also fixedly provided with a left pin and a right pin, the axial direction of each pin is longitudinal, the vertical positions of the left pin and the right pin are flush, the left pin and the right pin protrude out of the rear surface of the bracket plate, and the horizontal positions of the left pin and the right pin are positioned between the two circuit breakers;

the interlocking plate is provided with a left long hole and a right long hole, the length direction of each long hole is transverse, a left pin and a right pin of the support plate respectively penetrate through the left long hole and the right long hole of the interlocking plate, and the interlocking plate can move transversely relative to the support plate;

the lock is also provided with a lock, a key is matched with the lock, the lock comprises a lock shell and a lock core, the lock core is rotatably arranged in the lock shell, the lock core is provided with a lock hole into which the key can be inserted, the lock core can rotate relative to the lock shell under the control of the key, and a locking position and an unlocking position are formed in the rotation process of the lock core; the lock shell is fixedly connected with the interlocking plate; a hollow hole for the lock shell to pass through is formed in the middle of the support plate, the transverse width of the hollow hole is larger than the transverse size of the outline of the lock shell, and the lock shell can move left and right in the hollow hole;

a strip-shaped lock tongue piece is further arranged behind the interlocking plate, the center part of the lock tongue piece is fixedly connected with the lock cylinder, the lock tongue piece rotates along with the lock cylinder, two notches are formed in the left side of the lock tongue piece, the two notches are a first notch and a second notch respectively, and the first notch is located on the left side of the second notch; two notches are formed in the right side of the lock tongue piece, the two notches are a third notch and a fourth notch respectively, and the fourth notch is located on the right side of the third notch;

when the lock core rotates to a locking position, the length direction of the lock tongue piece is horizontal and transverse, the opening directions of the first notch and the second notch are vertical, the opening directions of the third notch and the fourth notch are vertical, the opening directions of the first notch and the second notch are the same, the opening directions of the third notch and the fourth notch are the same, but the opening directions of the second notch and the third notch are opposite, the transverse distance from the second notch to the right edge of the lock tongue piece is smaller than the transverse distance between the left pin and the right pin, and the transverse distance from the third notch to the left edge of the lock tongue piece is smaller than the transverse distance between the left pin and the right pin;

three indicative positions are formed in a left-right moving track of the lock shell in the hollow hole, and are respectively called as a left indicative position, a middle indicative position and a right indicative position;

the support plate, the lockset, the striking plate, the interlocking plate and the control handle form the following matching relationship:

when the lock shell moves to the middle indicating position, the left edge of the interlocking plate is positioned on the left side of the right end of the left control handle, and the right edge of the interlocking plate is positioned on the right side of the left end of the right control handle;

when the lock shell moves to the left indicating position, the left edge of the interlocking plate is positioned on the left side of the right end of the left control handle, and the right edge of the interlocking plate is positioned on the left side of the left end of the right control handle;

when the lock shell moves to the right indicating position, the left edge of the interlocking plate is positioned on the right side of the right end of the left control handle, and the right edge of the interlocking plate is positioned on the right side of the left end of the right control handle;

when the lock core rotates to the unlocking position, the vertical positions of the first notch, the second notch, the third notch and the fourth notch of the lock tongue piece are staggered with the vertical positions of the left pin and the right pin;

when the lock shell moves to the middle indicative position of the hollowed hole of the support plate and the lock cylinder rotates to the locking position, the pin on the left side of the support plate is positioned in the first notch of the lock tongue piece, and the pin on the right side of the support plate is positioned in the fourth notch of the lock tongue piece;

when the lock shell moves to the left indicative position of the hollowed hole of the support plate and the lock cylinder rotates to the locking position, the left pin of the support plate is positioned in the second notch of the lock tongue piece, and the right end of the lock tongue piece is positioned on the left side of the right pin of the support plate;

when the lock shell moves to the right indicative position of the support plate hollow hole and the lock cylinder rotates to the locking position, the right pin of the support plate is located in the third notch of the lock tongue piece, and the left end of the lock tongue piece is located on the right side of the left pin of the support plate.

The utility model has the advantages of it is following and effect:

one, the utility model discloses can realize two circuit breakers's interlocking function: 1. because the transverse width of the interlocking plate is larger than the clear distance of the two control handles in the transverse direction, the control handles of the two circuit breakers cannot be simultaneously positioned at a switching-on position, when the control handle of one circuit breaker is positioned at the switching-on position, the control handle of the other circuit breaker is necessarily positioned at a switching-off position (clamped by a fork opening at the edge of the interlocking plate and cannot be pulled), two power supplies are ensured not to be simultaneously switched on, and the safety of operation and maintenance personnel is ensured; 2. the interlocking plate is provided with a fork opening at the position corresponding to the opening position of the control handle, so the control handles of the two circuit breakers can be simultaneously positioned at the opening position; 3. the two circuit breakers can realize switching-on and switching-off state conversion, namely when a first circuit breaker is switched on and a second circuit breaker is switched off, the switching-on and switching-off state can be converted into switching-off of the first circuit breaker and switching-on of the second circuit breaker through certain operation, and vice versa; 4. in the locking state of closing one circuit breaker and opening the other circuit breaker, only an authorized person (with a key) can change the locking state to carry out switching operation of the opening and closing states of the two circuit breakers; 5. in the locked state that both circuit breakers are in the open position, only an authorized person (with a key) can change the locked state to close one of the circuit breakers.

And secondly, the structure is ingenious, the operation is simple and convenient, the reliability is very strong, and misoperation caused by the fault of a certain electronic element can be avoided.

Drawings

Fig. 1 is a schematic perspective view of the embodiment of the present invention when two circuit breakers are both in the open state and locked.

Fig. 2 is a schematic top view of the state shown in fig. 1.

Fig. 3 is an enlarged view of part G in fig. 2.

Fig. 4 is a front view schematically illustrating the state shown in fig. 2.

Fig. 5 is a rear view schematically illustrating the state shown in fig. 2.

Fig. 6 is a schematic view of the interlocking plate and the manipulation handle in the state shown in fig. 4.

Fig. 7 is a perspective view of the combination of the support plate, the interlock plate, the striking plate, and the lock in the state shown in fig. 1.

Fig. 8 is a rear view of the combination of the bracket plate, the interlock plate, the striking plate, and the lock in the state shown in fig. 1.

Fig. 9 is a perspective view of the bracket plate.

Fig. 10 is a front schematic view of a mounting plate.

Fig. 11 is an enlarged schematic view of the through-holes of the support plate.

Figure 12 is a perspective view of the interlock plate.

Figure 13 is a front schematic view of an interlock plate.

FIG. 14 is a perspective view of the combination lock and handle.

Fig. 15 is a perspective view of the combination of the lock and strike plate.

Fig. 16 is a perspective view of the strike plate.

Figure 17 is a front schematic view of the strike plate.

Fig. 18 is a rear view schematically showing the combination of the striking plate, the interlock plate, and the holder plate in the unlocked state.

Fig. 19 is a perspective view showing the combination of the striking plate, the interlocking plate, and the pin in the unlocked state.

Fig. 20 is a schematic view of the front view of the embodiment of the present invention when the left circuit breaker is in the open state and locked and the right circuit breaker handle can be pulled up and down.

Fig. 21 is a rear view schematically illustrating the state shown in fig. 20.

Fig. 22 is a schematic view of the interlocking plate and the manipulation handle in the state shown in fig. 20.

Fig. 23 is a perspective view showing the combination of the holder plate, the interlock plate, the striking plate, and the lock in the state shown in fig. 20.

Fig. 24 is a rear view of the combination of the bracket plate, interlock plate, strike plate and latch shown in fig. 20.

Fig. 25 is a schematic view of the circuit breaker at the right side when the circuit breaker is in the open position and locked and the circuit breaker control handle at the left side can be pulled up and down.

Fig. 26 is a rear view schematically illustrating the state shown in fig. 25.

Fig. 27 is a schematic view of the interlocking plate and the manipulation handle in the state shown in fig. 25.

Fig. 28 is a perspective view showing the combination of the holder plate, the interlock plate, the striking plate, and the lock in the state shown in fig. 25.

Fig. 29 is a rear view showing the combination of the holder plate, the interlock plate, the striking plate, and the lock in the state shown in fig. 25.

Detailed Description

The interlocking mechanism of the dual power switching device shown in fig. 1, 2 and 4 comprises two power supplies, each power supply is provided with a circuit breaker, the two circuit breakers are arranged side by side from left to right, a transverse distance is formed between a left circuit breaker 11 and a right circuit breaker 12, the front of the left circuit breaker 11 is provided with an operating handle 21 capable of being pulled up and down, the front of the right circuit breaker 12 is provided with an operating handle 22 capable of being pulled up and down, when the operating handle is pulled up to a switching-on position, the corresponding circuit breaker is switched on, and when the operating handle is pulled down to a switching-off position, the corresponding circuit breaker is switched off; the opening positions of the control handle 21 of the left circuit breaker 11 and the control handle 22 of the right circuit breaker 12 are in the same vertical position;

as shown in fig. 1, 2, 3, 4, 9 and 10, a fixed support plate 3 is arranged in front of the front faces of two circuit breakers, the support plate 3 is provided with two handle holes 31 for the control handles of the left and right circuit breakers to pass through, an interlocking plate 4 is transversely movably mounted behind the support plate 3, the left end section of the interlocking plate 4 is positioned in front of the left circuit breaker 11, the right end section of the interlocking plate 4 is positioned in front of the right circuit breaker 12, and the transverse width of the interlocking plate 4 is smaller than the lateral skin distance (such as the distance a and the distance D in fig. 2) of the left control handle 21 and the right control handle 22 and is larger than the lateral clear distance (such as the distance B and the distance C in fig. 2) of the left control handle 21 and the right control handle 22;

as shown in fig. 6, 12 and 13, the left and right side edges of the interlocking plate 4 are respectively provided with a fork 40 for forking the control handle, the fork 40 at the left side edge faces to the left, the fork 40 at the right side edge faces to the right, and the vertical position of the fork 40 is correspondingly matched with the control handle at the opening position;

as shown in fig. 2, 3, 7, 8, 12, 13 and 18, the rack plate 3 is further fixedly provided with a left pin 5 and a right pin 5, an axial direction of each pin 5 is a longitudinal direction, vertical positions of the left pin 5 and the right pin 5 are flush, the left pin 5 and the right pin 5 protrude out of a rear surface of the rack plate 3, and a horizontal position of the left pin 5 and the right pin 5 is located between the left circuit breaker 11 and the right circuit breaker 12; the interlocking plate 4 is provided with a left long hole 41 and a right long hole 41, the length direction of each long hole 41 is transverse, and a left pin 5 and a right pin 5 of the support plate respectively penetrate through the left long hole 41 and the right long hole 41 of the interlocking plate, so that the interlocking plate 4 can move transversely relative to the support plate 3, but the interlocking plate 4 cannot rotate relative to the support plate 3;

as shown in fig. 1, 4, 13, 14 and 15, a lock is further provided, the lock is provided with a key, the lock comprises a lock shell 71 and a lock core 72, the lock core 72 is rotatably installed in the lock shell 71, the lock core 72 is provided with a lock hole 73 into which the key can be inserted, the lock core 72 can rotate relative to the lock shell 71 under the control of the key, and a locking position and an unlocking position are formed in the rotation process of the lock core 72; the lockset is also provided with a handle 8, and the handle 8 is fixedly connected with the lock shell 71; the lock shell 71 is fixedly connected with the interlocking plate 4, the longitudinal middle part of the lock shell is octagonal, and the longitudinal middle part of the lock shell is fixedly embedded in the octagonal hole 42 in the middle of the interlocking plate 4; the middle position of the support plate 3 is provided with a hollow hole 30 for the lock shell to pass through, and the transverse width of the hollow hole 30 is larger than the transverse size of the outline of the lock shell 71, so that the lock shell 71 can move left and right in the hollow hole 30.

As shown in fig. 15, 16, 17, 2, 3, 7, and 8, a long-strip-shaped striking plate 6 is further disposed behind the interlocking plate 4, a central portion of the striking plate 6 is fixedly connected to the key cylinder 72, the striking plate 6 rotates along with the key cylinder, two notches are disposed on the left side of the striking plate 6, the two notches are a first notch 61 and a second notch 62, respectively, and the first notch 61 is located on the left side of the second notch 62; two notches are formed in the right side of the lock tongue piece 6, the two notches are a third notch 63 and a fourth notch 64 respectively, and the fourth notch 64 is located on the right side of the third notch 63;

during the rotation of the key cylinder 72, the striking plate 6 rotates synchronously, when the key cylinder 72 rotates to the locking position, the length direction of the striking plate 6 is horizontal and transverse, the opening directions of the first notch 61 and the second notch 62 are both upward, the opening directions of the third notch 63 and the fourth notch 64 are both downward, that is, the opening directions of the first notch and the second notch are the same, the opening directions of the third notch and the fourth notch are the same, but the opening directions of the second notch and the third notch are opposite, the transverse distance from the second notch 42 to the right edge of the striking plate 6 (as shown by a dimension line m in fig. 17) is smaller than the transverse distance between the left pin 5 and the right pin 5, and the transverse distance from the third notch 43 to the left edge of the striking plate 6 is smaller than the transverse distance between the left pin 5 and the right pin 5 (as shown by a dimension line n in fig. 17), as shown in fig. 24 and fig. 29;

the lock shell 71 is provided with three indicative positions in a left-right moving track in the support plate hollow hole 30, wherein the three indicative positions are respectively called a left indicative position, a middle indicative position and a right indicative position; specifically, as shown in fig. 11, 4, 20, and 25, the bottom edge of the hole wall of the support plate hollow hole 30 is formed as a wave-shaped curve, the wave-shaped curve includes three arc-shaped curves, i.e., an arc-shaped curve HJK, an arc-shaped curve KMN, and an arc-shaped curve NPQ, each arc-shaped curve is correspondingly formed with a trough position, a left trough position (shown as a J point in fig. 11) becomes the left indicating position, a middle trough position (shown as a M point in fig. 11) becomes the middle indicating position, and a right trough position (shown as a P point in fig. 11) becomes the right indicating position. Because the bottom edge of the hole wall of the hollow hole 30 is formed into a wave-shaped curve, when an operator holds the handle 8 and transversely moves the lock shell 71 to pass through the positions of the wave troughs, hand feeling can be generated, the hand feeling forms a certain indicating function, and therefore the three positions of the wave troughs can be used as indicating positions.

The support plate 3, the lockset, the lock tongue piece 6, the interlocking plate 4 and the control handle form the following matching relationship:

when lock shell 71 is moved to the intermediate indicating position, the left edge of interlock plate 4 is positioned to the left of the right end of left operating handle 21 and the right edge of interlock plate 4 is positioned to the right of the left end of right operating handle 22, as shown in fig. 6;

when lock shell 71 is moved to the left indicating position, the left edge of interlock plate 4 is positioned to the left of the right end of left operating handle 21 and the right edge of interlock plate 4 is positioned to the left of the left end of right operating handle 22, as shown in fig. 22;

when lock case 71 is moved to the right indicating position, the left edge of interlock plate 4 is positioned to the right of the right end of left operating handle 21 and the right edge of interlock plate 4 is positioned to the right of the left end of right operating handle 22, as shown in fig. 27;

when the lock core 72 rotates to the unlocking position, the vertical positions of the first notch 61, the second notch 62, the third notch 63 and the fourth notch 64 of the lock tongue piece are staggered with the vertical positions of the left pin 5 and the right pin 5, as shown in fig. 18 and 19;

when the lock shell 71 is moved to the middle indicative position of the bracket plate hollow hole 30 and the lock cylinder 72 is rotated to the locking position, the left pin 5 of the bracket plate is located in the first notch 61 of the striking plate, and the right pin 5 of the bracket plate is located in the fourth notch 64 of the striking plate, as shown in fig. 7, 8 and 17;

when the lock shell 71 is moved to the left indicative position of the bracket plate hollow-out hole 30 and the lock cylinder 72 is rotated to the locking position, the left pin 5 of the bracket plate is located in the second notch 62 of the striking plate, and the right end of the striking plate 6 is located at the left side of the right pin 5 of the bracket plate, as shown in fig. 23, 24 and 17;

when the lock case 71 is moved to the right indicating position of the bracket plate hollow 30 and the lock cylinder 72 is rotated to the lock position, the right pin 5 of the bracket plate 3 is located in the third notch 63 of the strike plate, and the left end of the strike plate 6 is located to the right of the left pin 5 of the bracket plate, as shown in fig. 28, 29 and 17.

Of course, the indicative position of the support plate hollow-out hole 30 may also be indicated by the graphics printed on the edge of the hole wall of the support plate hollow-out hole 30; the left indicating position can also be formed by touching the left edge part of the hollow hole 30 by the lock shell 71 to form an indicating function, and the right indicating position can also be formed by touching the right edge part of the hollow hole 30 by the lock shell 71 to form an indicating function.

The working process and principle of the above embodiment are as follows:

firstly, in an initial state, the lock shell 71 is located at a middle indicative position of the hollow hole 30, the left control handle 21 is pulled to an opening position, and simultaneously the right control handle 22 is also pulled to an opening position, at this time, the right half part of the control handle 21 of the left circuit breaker is clamped into the fork 40 at the left edge of the interlocking plate, the left half part of the control handle 22 of the right circuit breaker is clamped into the fork 40 at the right edge of the interlocking plate, and both the control handles cannot be pulled, as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6; the lock cylinder 72 rotates to the locking position, the left pin 5 of the bracket plate is located in the first notch 61 of the lock tongue piece, and the right pin 5 of the bracket plate is located in the fourth notch 64 of the lock tongue piece, as shown in fig. 7 and 8, the key can be pulled out at this time, the lock cylinder 72 cannot rotate, the lock tongue piece 6 cannot rotate, and therefore the lock cylinder (lockset) cannot move transversely, and therefore the control handles of the two circuit breakers are fixed in the opening state, and an unauthorized person cannot close the switch.

Secondly, if an authorized person wants to change the initial state shown in fig. 1, for example, wants to close the right-side circuit breaker 12 (and ensure that the left-side circuit breaker 11 is opened), the key can be used to rotate the lock cylinder 72, so that the lock cylinder 72 is rotated to the unlocked state, as shown in fig. 18 and 19, and then the two pins 5 are disengaged from the notches of the lock tongue pieces, so that the lock cylinder (lock) can move laterally; then, the handle 8 can be held by hands and moved leftwards, so as to drive the lock to come to a left indicative position along the hollowed hole 30, so that the operating handle 21 of the left circuit breaker still is clamped in the fork opening at the left edge of the interlocking plate, the operating handle 22 of the right circuit breaker is separated from the fork opening at the right edge of the interlocking plate, so that the operating handle 22 of the right circuit breaker can be freely pulled, in this state, the lock cylinder 72 can be rotated by using the lock key, so that the lock cylinder 72 is rotated to a locked state, as shown in fig. 20, 21, 22, 23 and 24, so that the left pin 5 of the bracket plate is positioned in the second notch 62 of the lock tongue plate, and the right end of the lock tongue plate 6 is positioned at the left side of the right pin 5 of the bracket plate; at this time, the key can be pulled out, the lock cylinder 72 cannot rotate, and the striking plate 6 cannot rotate, so that the lock cylinder (lock) cannot move laterally, and an unauthorized person cannot change the state (a state that the left-side circuit breaker 11 is opened and the right-side circuit breaker 12 can be freely pulled up and down).

If an authorized person wants to change the initial state shown in fig. 20 and wants to switch on the left-side circuit breaker 11 (and ensure that the right-side circuit breaker 12 is switched off), the key can be used to rotate the lock cylinder 72, so that the lock cylinder 72 is rotated to the unlocked state, and then the two pins 5 are separated from the notches of the lock tongue pieces, so that the lock cylinder (lockset) can move transversely; thereafter, the handle 8 can be held by hand and moved to the right to drive the lock to the right indicative position along the through hole 30, so that the handle 22 of the right circuit breaker is clamped into the fork opening at the right edge of the interlocking plate, and the handle 21 of the left circuit breaker is separated from the fork opening at the left edge of the interlocking plate, so that the handle 22 of the left circuit breaker can be freely pulled, and in this state, the key 72 can be rotated to rotate the key 72 to the locked state, as shown in fig. 25, 26, 27, 28 and 29, so that the right pin 5 of the rack plate 3 is located in the third notch 63 of the lock tongue plate, and the left end of the lock tongue plate 6 is located at the right side of the left pin 5 of the rack plate, at this time, the key can be pulled out, the key 72 cannot be rotated, the lock tongue plate 6 cannot be rotated, so that the lock cylinder (lock) cannot be moved laterally, and therefore it is impossible for an unauthorized person to change the state (ensure that the left circuit breaker 11 is opened and the lock is, And the right-side circuit breaker 12 can be freely flipped up and down).

Claims (1)

1. An interlocking mechanism of a double-power switching device comprises two paths of power supplies, wherein each path of power supply is provided with a circuit breaker, the two circuit breakers are arranged side by side at the left and right and are separated by a transverse distance, and the front side of each circuit breaker is provided with an operating handle which can be pulled up and down; when the control handle is pulled upwards to a switch-on position, the corresponding circuit breaker is switched on, and when the control handle is pulled downwards to a switch-off position, the corresponding circuit breaker is switched off; the opening positions of the control handles of the two circuit breakers are in the same vertical position; the front sides of the two circuit breakers are provided with fixed support plates, the support plates are provided with two handle holes for the control handles of the left circuit breaker and the right circuit breaker to pass through, the rear sides of the support plates are transversely and movably provided with interlocking plates, the left end sections of the interlocking plates are positioned in front of the left circuit breaker, the right end sections of the interlocking plates are positioned in front of the right circuit breaker, and the transverse width of the interlocking plates is larger than the transverse clear distance of the two control handles;

fork openings for forking the control handle are respectively formed in the edges of the left side and the right side of the interlocking plate, the fork opening on the edge of the left side faces the left side, the fork opening on the edge of the right side faces the right side, and the vertical positions of the fork openings are correspondingly matched with the control handle in the brake separating position;

the bracket plate is also fixedly provided with a left pin and a right pin, the axial direction of each pin is longitudinal, the vertical positions of the left pin and the right pin are flush, the left pin and the right pin protrude out of the rear surface of the bracket plate, and the horizontal positions of the left pin and the right pin are positioned between the two circuit breakers;

the interlocking plate is provided with a left long hole and a right long hole, the length direction of each long hole is transverse, a left pin and a right pin of the support plate respectively penetrate through the left long hole and the right long hole of the interlocking plate, and the interlocking plate can move transversely relative to the support plate;

the lock is also provided with a lock, a key is matched with the lock, the lock comprises a lock shell and a lock core, the lock core is rotatably arranged in the lock shell, the lock core is provided with a lock hole into which the key can be inserted, the lock core can rotate relative to the lock shell under the control of the key, and a locking position and an unlocking position are formed in the rotation process of the lock core; the lock shell is fixedly connected with the interlocking plate; a hollow hole for the lock shell to pass through is formed in the middle of the support plate, the transverse width of the hollow hole is larger than the transverse size of the outline of the lock shell, and the lock shell can move left and right in the hollow hole;

a strip-shaped lock tongue piece is further arranged behind the interlocking plate, the center part of the lock tongue piece is fixedly connected with the lock cylinder, the lock tongue piece rotates along with the lock cylinder, two notches are formed in the left side of the lock tongue piece, the two notches are a first notch and a second notch respectively, and the first notch is located on the left side of the second notch; two notches are formed in the right side of the lock tongue piece, the two notches are a third notch and a fourth notch respectively, and the fourth notch is located on the right side of the third notch;

when the lock core rotates to a locking position, the length direction of the lock tongue piece is horizontal and transverse, the opening directions of the first notch and the second notch are vertical, the opening directions of the third notch and the fourth notch are vertical, the opening directions of the first notch and the second notch are the same, the opening directions of the third notch and the fourth notch are the same, but the opening directions of the second notch and the third notch are opposite, the transverse distance from the second notch to the right edge of the lock tongue piece is smaller than the transverse distance between the left pin and the right pin, and the transverse distance from the third notch to the left edge of the lock tongue piece is smaller than the transverse distance between the left pin and the right pin;

three indicative positions are formed in a left-right moving track of the lock shell in the hollow hole, and are respectively called as a left indicative position, a middle indicative position and a right indicative position;

the support plate, the lockset, the striking plate, the interlocking plate and the control handle form the following matching relationship:

when the lock shell moves to the middle indicating position, the left edge of the interlocking plate is positioned on the left side of the right end of the left control handle, and the right edge of the interlocking plate is positioned on the right side of the left end of the right control handle;

when the lock shell moves to the left indicating position, the left edge of the interlocking plate is positioned on the left side of the right end of the left control handle, and the right edge of the interlocking plate is positioned on the left side of the left end of the right control handle;

when the lock shell moves to the right indicating position, the left edge of the interlocking plate is positioned on the right side of the right end of the left control handle, and the right edge of the interlocking plate is positioned on the right side of the left end of the right control handle;

when the lock core rotates to the unlocking position, the vertical positions of the first notch, the second notch, the third notch and the fourth notch of the lock tongue piece are staggered with the vertical positions of the left pin and the right pin;

when the lock shell moves to the middle indicative position of the hollowed hole of the support plate and the lock cylinder rotates to the locking position, the pin on the left side of the support plate is positioned in the first notch of the lock tongue piece, and the pin on the right side of the support plate is positioned in the fourth notch of the lock tongue piece;

when the lock shell moves to the left indicative position of the hollowed hole of the support plate and the lock cylinder rotates to the locking position, the left pin of the support plate is positioned in the second notch of the lock tongue piece, and the right end of the lock tongue piece is positioned on the left side of the right pin of the support plate;

when the lock shell moves to the right indicative position of the support plate hollow hole and the lock cylinder rotates to the locking position, the right pin of the support plate is located in the third notch of the lock tongue piece, and the left end of the lock tongue piece is located on the right side of the left pin of the support plate.