CN106409563A - Circuit breaker and three-position switch interlocking device and circuit breaker-three-position switch device - Google Patents

Abstract

The invention relates to the field of a high-voltage electrical apparatus, and especially relates to a circuit breaker and three-position switch interlocking device and a circuit breaker-three-position switch device. The circuit breaker and three-position switch interlocking device comprises a side plate, a tripping assembly, a circuit breaker reclosing self-locking assembly and a three-position switch interlocking assembly, wherein the tripping assembly, the circuit breaker reclosing self-locking assembly and the three-position switch interlocking assembly are arranged on the side plate. The tripping assembly comprises a closing trigger crank arm; the circuit breaker reclosing self-locking assembly comprises a reclosing locking trigger crank arm; the three-position switch interlocking assembly comprises a locking three-position trigger crank arm; the closing trigger crank arm, the reclosing locking trigger crank arm and the locking three-position trigger crank arm are coaxial, synchronous and rotary crank arms; the closing trigger crank arm is provided with a just closing position and a closing position in sequence along the closing operation action direction; and triggering time of the reclosing locking trigger crank arm and triggering time of the locking three-position trigger crank arm are before the closing trigger crank arm arrives at the just closing position. The problem that a circuit breaker and a three-position switch cannot be interlocked midway in the operation process is solved.

Description

Circuit breaker and three-position switch interlocking device and circuit breaker-three-position switch device

technical field

The invention relates to the field of high-voltage electrical appliances, in particular to a circuit breaker-three-position switch interlocking device and a circuit breaker-three-position switch device.

Background technique

Circuit breakers and three-position switches are two types of switching devices used in power transmission circuits. Due to the differences in their respective characteristics and functions, in practical applications, it is required to have a certain relative opening and closing relationship between the circuit breaker and the three-position switch, otherwise it will cause failure and bring great losses.

The specific relative opening and closing relationship between the circuit breaker and the three-position switch is realized through the interlocking device between the circuit breaker and the three-position switch, which interlocks the operation between the circuit breaker and the three-position switch to ensure There can be a specific opening and closing relationship between the two. The current circuit breaker and three-position switch interlocking device can only realize the function of reliable self-locking and blocking three-position switch when the circuit breaker is reliably closed. Once the circuit breaker is stuck during the closing process, the The circuit breaker has not been closed in place, and the interlock device will not be in place at this time. At this time, the closing of the circuit breaker is not locked, and the three-position switch is not locked. Once the circuit breaker is automatically reclosed or manually operated for three position switch, a serious electrical failure will occur. In addition, when the circuit breaker is in the opening position, the three-position switch valve must be fully opened to lock the closing operation of the circuit breaker. The above situations will bring safety hazards to on-site maintenance.

Contents of the invention

The object of the present invention is to provide a circuit breaker and three-position switch interlocking device to solve the problem that the circuit breaker and the three-position switch cannot be interlocked during the operation process.

At the same time, the object of the present invention is also to provide a circuit breaker-three-position switch device using the above-mentioned interlocking device.

In order to achieve the above purpose, the circuit breaker and three-position switch interlocking device of the present invention adopts the following technical solutions:

Scheme 1: Circuit breaker and three-position switch interlocking device, including side plates and tripping components installed on the side plates, circuit breaker reclosing self-locking components and three-position switch interlocking components, the tripping components include closing The trigger arm, the circuit breaker reclosing self-locking component includes the reclosing lock trigger arm, the three-position switch interlocking component includes the three-position trigger arm for locking, the closing trigger arm, the reclosing lock trigger arm and the lock The three-position trigger arm is a coaxial and synchronous rotating arm. The closing trigger arm is provided with a just-closed position and a closing position in sequence along the action direction of the closing operation. The respective trigger timings of the trigger arms are all before the closing trigger arm reaches the just-closed position.

Scheme 2: On the basis of Scheme 1, the tripping assembly also includes a closing tripping piece, a closing tripping connector, a positioning piece and a cam, and the closing tripping piece, a closing tripping connector and a positioning piece Connected in sequence to form a four-bar linkage mechanism, the cam can be limited by the positioner to support the energy storage position, and the cam can be reversely rotated by the cam surface and the closing trigger arm in cooperation with the pressing arm assembly after the cam is released from the limit.

Scheme 3: On the basis of Scheme 2, the self-locking assembly of the reclosing brake also includes a self-locking chain plate, which is guided and assembled on the side plate along the direction perpendicular to the rotation axis of the trigger arm of the closing trigger and has a connecting part , when the closing and tripping connecting piece moves to the closing position, and the self-locking interlock plate moves a set distance away from the closing trigger lever arm, the limiting part of the connecting piece will interact with the closing and tripping connecting piece Top limit, when the reclosing lock trigger arm rotates with the closing trigger arm, it can push upward the elastic part set on the self-locking chain plate. When the closing and tripping connector is reset, the self-locking chain plate will It acts under the action of the elastic member and prevents the closing and tripping connecting piece from performing the closing operation again.

Scheme 4: On the basis of Scheme 3, the limiting part of the connector is composed of a bending part of the self-locking chain plate close to the closing and tripping part, and the closing and tripping connector is provided with a The bending part corresponding to the bending part.

Scheme 5: On the basis of Scheme 3, the elastic member includes a return compression spring, which is set on a guide rod, and the guide rod is a movable guide rod and its movable direction is the same as that of the self-locking chain plate , the return pressure spring is supported between the guide rod and the self-locking chain plate.

Scheme 6: On the basis of Scheme 5, a return extension spring is provided between the self-locking chain plate and the side plate, and the force value corresponding to the maximum stretching stroke of the return extension spring is less than the force value corresponding to the initial fixed position of the return compression spring.

Scheme 7: On the basis of scheme 3, the three-position switch interlocking component also includes a locking three-position locking plate that cooperates with the locking three-position trigger arm. The locking three-position trigger arm is a hook-type arm, and the locking The three-position chain plate and the self-locking chain plate are guided in the same direction and assembled on the side plate to form a one-way transmission structure that can only be driven by the locking three-position chain plate to move the self-locking chain plate to the direction away from the recloser locking trigger arm. .

Solution 8: On the basis of solution 7, the hook portion of the locking three-position trigger arm has an arc-shaped inner surface extending along the hook portion.

Scheme 9: On the basis of scheme 8, the end of the locking three-station chain plate away from the locking three-station trigger arm is provided with a reversing mechanism, and the reversing mechanism includes a fixed plate and a guide assembly mounted on the fixed plate. 1. A stroke plate used to connect with the three-position switch valve, one of the stroke plate and the three-position locking plate is provided with an arc-shaped hole, and the other is provided with a radially movable guide pin.

Scheme 10: On the basis of Scheme 9, the stroke that the chain plate can move with the three-position switch valve is greater than the minimum stroke that the three-position chain plate drives the reclosing self-locking chain plate to move to limit the movement of the closing and tripping connector .

The circuit breaker-three-position switch device adopts the following technical solutions:

Scheme 1: Circuit breaker-three-position switch device, including circuit breaker, three-position switch and interlocking device. The interlocking device includes a side plate and a tripping component installed on the side plate of the mechanism of the circuit breaker, and the reclosing self-locking of the circuit breaker component and three-position switch interlocking assembly, the tripping assembly includes a closing trigger arm, the circuit breaker reclosing self-locking assembly includes a reclosing locking trigger arm, and the three-position switch interlocking assembly includes a valve with a three-position switch The connected locking three-position trigger arm, the closing trigger arm, the reclosing locking trigger arm and the locking three-position trigger arm are coaxial and synchronous rotating crank arms, and the closing trigger arm moves along the closing The action direction of the brake operation is sequentially provided with a just-closed position and a closed position. The respective triggering timings of the reclosing locking trigger arm and the locking three-position trigger arm are all before the closing trigger arm reaches the just-closing position.

Scheme 2: On the basis of Scheme 1, the tripping assembly also includes a closing tripping piece, a closing tripping connector, a positioning piece and a cam, and the closing tripping piece, a closing tripping connector and a positioning piece Connected in sequence to form a four-bar linkage mechanism, the cam can be limited by the positioner to support the energy storage position, and the cam can be reversely rotated by the cam surface and the closing trigger arm in cooperation with the pressing arm assembly after the cam is released from the limit.

Scheme 3: On the basis of Scheme 2, the self-locking assembly of the reclosing brake also includes a self-locking chain plate, which is guided and assembled on the side plate along the direction perpendicular to the rotation axis of the trigger arm of the closing trigger and has a connecting part , when the closing and tripping connecting piece moves to the closing position, and the self-locking interlock plate moves a set distance away from the closing trigger lever arm, the limiting part of the connecting piece will interact with the closing and tripping connecting piece Top limit, when the reclosing lock trigger arm rotates with the closing trigger arm, it can push upward the elastic part set on the self-locking chain plate. When the closing and tripping connector is reset, the self-locking chain plate will It acts under the action of the elastic member and prevents the closing and tripping connecting piece from performing the closing operation again.

Scheme 4: On the basis of Scheme 3, the limiting part of the connector is composed of a bending part of the self-locking chain plate close to the closing and tripping part, and the closing and tripping connector is provided with a The bending part corresponding to the bending part.

Scheme 5: On the basis of Scheme 3, the elastic member includes a return compression spring, which is set on a guide rod, and the guide rod is a movable guide rod and its movable direction is the same as that of the self-locking chain plate , the return pressure spring is supported between the guide rod and the self-locking chain plate.

Scheme 6: On the basis of Scheme 5, a return extension spring is provided between the self-locking chain plate and the side plate, and the force value corresponding to the maximum stretching stroke of the return extension spring is less than the force value corresponding to the initial fixed position of the return compression spring.

Scheme 7: On the basis of scheme 3, the three-position switch interlocking component also includes a locking three-position locking plate that cooperates with the locking three-position trigger arm. The locking three-position trigger arm is a hook-type arm, and the locking The three-position chain plate and the self-locking chain plate are guided in the same direction and assembled on the side plate to form a one-way transmission structure that can only be driven by the locking three-position chain plate to move the self-locking chain plate to the direction away from the recloser locking trigger arm. .

Solution 8: On the basis of solution 7, the hook portion of the locking three-position trigger arm has an arc-shaped inner surface extending along the hook portion.

Scheme 9: On the basis of scheme 7, the end of the locking three-station chain plate far away from the locking three-station trigger arm is provided with a reversing mechanism, and the reversing mechanism includes a fixed plate and a guide assembly mounted on the fixed plate. 1. The stroke plate connected with the three-position switch valve, one of the stroke plate and the locking three-position chain plate is provided with an arc-shaped hole, and the other is provided with a radially movable guide that cooperates with the arc-shaped hole. pin.

Scheme 10: On the basis of Scheme 9, the stroke that the chain plate can move with the three-position switch valve is greater than the minimum stroke that the three-position chain plate drives the reclosing self-locking chain plate to move to limit the movement of the closing and tripping connector .

The beneficial effects of the present invention are: since the respective triggering timings of the reclosing locking trigger arm and the locking three-position trigger arm are all before the closing trigger arm reaches the just-closed position, therefore, before the circuit breaker is fully closed and before the circuit breaker is completely closed Before the valve of the three-position switch is fully opened, both the circuit breaker and the three-position switch can realize corresponding self-locking and interlocking, thereby solving the problem that the circuit breaker and the three-position switch cannot be interlocked during operation.

Description of drawings

Fig. 1 is a perspective view of a circuit breaker and a three-position switch interlocking device;

Figure 2 is a front view of the circuit breaker and three-position switch interlocking device;

Fig. 3 is a front view of the position of the closing tripping component and the reclosing self-locking component when the closing is in place during the closing and tripping process of the circuit breaker;

Figure 4 is a front view of the circuit breaker starting to realize the self-locking position during the closing process;

Fig. 5 is a front view of the position where the three-position switch is locked (so that the three-position cannot be operated) during the closing process of the circuit breaker;

Fig. 6 is a front view of the maximum stroke position of the three-position switch valve pulling the travel plate when the circuit breaker is in the closing position;

Fig. 7 is a front view of the three-position switch starting to reliably lock the closing operation of the circuit breaker when the circuit breaker is in the open position.

detailed description

Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

The specific embodiments of the circuit breaker and three-position switch interlocking device of the present invention are shown in Fig. 1 to Fig. 7 .

Here, firstly, the components of the device and the structure and function of each part are introduced. The device specifically includes three main components, which are the tripping component, the circuit breaker reclosing self-locking component and the three-position switch interlocking component, all of which are installed on the mechanism side plate of the circuit breaker. The design idea of the device is: design and arrange the circuit breaker reclosing self-locking component according to the installation position and tripping principle of the tripping component, and design and arrange the reclosing self-locking component according to the installation position and self-locking principle of the circuit breaker. Three-position switch interlock assembly.

The tripping assembly is mainly used for the closing operation of the circuit breaker. Figures 1, 2, 3, 4, 6, and 7 all show the composition, arrangement and connection relationship of the tripping assembly. Specifically referring to FIG. 2 , the tripping assembly includes a cam 1 , a bearing 2 , a closing tripping member 3 , a closing tripping connector 4 , a positioning member 5 , a closing trigger arm 14 and a closing roller 15 . Wherein the bearing 2 is assembled on one side of the cam 1, forming a supporting structure on the corresponding side of the cam 1, and playing a role similar to a fulcrum. The closing trip part 3 is the input end of the tripping assembly. When in use, it is operated by the closing trip part 3. In this embodiment, the closing trip part 3 specifically adopts the closing trip plate. In order to facilitate operation, one side of the closing and tripping plate is also designed with an ear edge in a bent manner. The closing and tripping connector 4 plays the role of connecting the closing and tripping member 3 and the positioning member 5. Here, the closing and tripping connector 4 is specifically a plate structure, which is a closing and tripping connecting plate. The positioning piece 5 mainly plays the role of limiting the position of the cam 1. In this embodiment, the positioning piece 5 is an angular piece. Of course, in other embodiments, the positioning piece 5 can also use a straight rod or an arc rod. Under normal circumstances, the result is only to increase the volume of the device, but it can also play a role in limiting the cam. It can be seen from Fig. 1 that the closing tripping part 3, the closing tripping connecting part 4 and the positioning part 5 are connected in sequence to form a four-bar linkage mechanism. The closing trigger arm 14 is used for triggering the mechanism to make the circuit breaker perform the closing action. Its structure and principle are in the prior art and will not be repeated here. The closing roller 15 is installed at one side of the closing trigger arm 14, and it is used to cooperate with the cam surface of the released cam 1 to reduce the wear of the closing trigger arm 14 and the joint of the cam 1 and to reduce the cooperation between the two. risk of jamming, see Figure 3.

During use, when the closing release part 3 is pressed, the positioning part 5 will act under the action of the closing release connection part and remove the bearing 2 to release the limit on the cam 1. At this time The energy-stored cam 1 will rotate and drive the closing trigger arm 14 to act together, and then the closing operation of the circuit breaker can be completed.

The reclosing self-locking assembly of the circuit breaker includes the first positioning screw 6, the reclosing self-locking chain plate 8, the first fixed pin 9, the reclosing lock trigger arm 10, the chain buffer screw 11, the reset compression spring 12 and the first reset Extension spring 7. The first positioning screw 6 is fixed on the side plate of the mechanism, and its specific fixing method can be selected according to needs, such as welding, threaded connection and the like. The reclosing self-locking interlocking plate 8 is installed on the side plate of the mechanism through the first positioning screw 6 and the movement trajectory is limited by the first positioning screw 6. Here, the hole where the reclosing self-locking interlocking plate 8 and the first positioning screw 6 cooperate is an oblong circle hole, so that the reclosing brake self-locking chain plate 8 can reciprocate in a straight line on the side plate of the mechanism, and the first fixed pin shaft 9 is fixed on the reclosing brake self-locking chain plate 8, which is mainly to realize the three-position switch The linkage of chain components will be described in detail below, so I won’t go into details here. The reclosing locking trigger arm 10 and the closing trigger arm 14 are set coaxially and synchronously. Here, the two are fixedly installed on the same axis, but it needs to be emphasized that the two can also be an integrated structure. , of course, they are not limited to an integrated structure, such as being fixed to each other or relative to each other after being manufactured separately. The chain buffer screw 11 guides and moves and is assembled on the self-locking chain plate 8 of the reclosing brake. When pressing the interlocking buffer screw 11, if the self-locking interlocking plate 8 of the reclosing brake does not act, the reset stage clip 12 compresses and stores energy. The first return tension spring 7 is connected between the recloser self-locking chain plate 8 and the side plate of the mechanism. Set the force value corresponding to the maximum stretching stroke of the first return extension spring 7 to be smaller than the force value corresponding to the initial fixed position of the return compression spring 12, so as to ensure that the first return extension spring 7 will not affect the upward movement of the self-locking chain plate 8 of the reclosing brake (Fig. 1 orientation) movement.

During the closing process, the reclosing self-locking trigger arm 10 will rotate together with the closing trigger arm 14. During the rotation, it will form a top pressure fit relationship with the interlocking buffer screw 11. Since the reclosing self-locking The trigger arm 10 adopts a cam structure, so it can drive the interlock buffer screw 11 away from its axis. If the position of the recloser self-locking interlock plate 8 is not restricted, the recloser self-lock interlock plate 8 will produce a corresponding of the mobile. Certainly, when the reclosing brake self-locking triggers the crank arm 10 to reset and the effect on the interlocking buffer screw 11 disappears, the first reset tension spring 7 can drive the reclosing brake self-locking chain plate 8 to reset.

Setting the reclosing lock trigger arm 10 can trigger the reclosing brake self-locking chain plate 8 to move more than the reclosing brake self-locking chain plate 8 can limit the stroke required by the reclosing brake tripping connector 4, and the reclosing brake locking trigger arm 10 adopts a cam Design principle, the self-locking chain plate 8 of the reclosing brake is set at the end close to the tripping connector 4 of the reclosing brake. The reclosing brake trip connector 4 has been limited by the reclosing brake self-locking chain plate 8 just before the closed position; in the opening state, under the action of the first reset spring 7, the reclosing brake self-locking chain plate 8 can quickly return to the position. to avoid affecting the next closing operation.

The three-position switch interlocking assembly includes a locking three-position trigger arm 13, a locking three-position interlocking plate 16, a travel plate 17, a fixing plate 18, a second positioning screw 19, a second return tension spring 20 and a second fixing pin twenty one. The locking three-position trigger arm 13 is coaxial and synchronized with the closing trigger arm 14, and is also fixedly installed on the same axis as the closing trigger arm 14. It specifically adopts a hook arm structure, and the hook part adopts a round Arc-shaped structure, the inner surface of the hook part forms a circular arc surface extending along the hook part, the locking three-position chain plate 16 cooperates with the mechanism side plate through the second positioning screw 19 fixed on the mechanism side plate, and it is matched with the second positioning The hole for the screw fit is an oblong hole, so it can move in the same direction relative to the side plate of the mechanism and the self-locking chain plate 8 of the recloser. The welding protrusion at the bottom of the locking three-station chain plate 16 is located within the coverage radius of the arc hook of the trigger arm 13 of the locking three-station. When the station trigger arm 13 is in place, the movable stroke of the locking three-station chain plate 16 is locked, which ensures that the locking of the three-station trigger arm 13 can limit the upward movement of the locking three-station chain plate 16 before the just-closed position. The three-position switch valve is open. In addition, the locking three-station chain plate 16 is also provided with a long hole corresponding to the first fixed pin shaft, and the first fixed pin shaft 9 is located at the bottom of the corresponding long hole on the three-station chain plate (near the three-station locking plate). station triggers one end of the crank arm). The second return tension spring 20 is used to provide the locking three-station chain plate 16 with a force moving away from the direction of the locking three-station trigger arm, and the second fixed pin shaft 21 is used to realize the locking of the three-station chain plate and the mechanism side. Board connections are not described here. Guide fit between the fixed plate 18 and the travel plate 17, the guiding direction of the travel plate 17 is perpendicular to the motion direction of the locking three-station chain plate 16, so guide pins are set on the locking three-station chain plate 16, and the travel plate is provided with a guide pin. The arc-shaped guide hole is formed, and the guide pin is inserted in the arc-shaped guide hole to form a reversing transmission mechanism. At the same time, when any one of the travel plate and the locking three-position chain plate is locked, the other is also locked. Can't move. The three-position switch valve drives the locking three-position chain plate 16 to move more than the locking three-position chain plate 16 drives the self-locking chain plate 8 of the reclosing brake to move to the minimum stroke that can limit the movement of the reclosing tripping connector 4, and the gate is opened. position, the three-position switch valve pulls the stroke plate 17 to move, drives the locking three-position chain plate 16 to move upward, and drives the self-locking chain plate 8 of the recloser to move upward, so as to realize the locking of the circuit breaker when the three-position switch valve is not fully opened The function of closing operation prevents the circuit breaker from being mistakenly closed when the three-position switch is operated.

When the trigger arm of the locking three-position trigger arm rotates with the closing trigger arm, its "hook" can hook the locking three-position locking plate to prevent it from moving.

The following is an introduction to the coordination relationship and the principle of interaction among the above three parts.

In Fig. 2, the closing trigger arm is in the closing position, and other parts of the interlock device are in the initial position. During the closing operation, press the closing release part to realize the cam tripping. During the closing process, the cam 1 presses the closing roller 15 The counterclockwise movement along the cam outline drives the closing trigger arm 14, the reclosing locking arm 10 and the locking three-position trigger arm 13 to move counterclockwise to realize the closing operation. The first fixed pin shaft 9 is welded on the self-locking chain plate 8 of the reclosing brake, and the three-position locking plate 16 is connected with the first fixed pin shaft 9 to establish the self-locking chain plate 8 of the reclosing brake and the three-position locking plate 16 bridges of mutual influence. The locking three-station chain plate 16 is connected to the stroke plate 17 through guide pins (screws), and the stroke plate 17 is connected to the fixed plate 18 through screws, so that the vertical movement stroke of the three-station chain plate 16 is realized. Convert into the stroke of stroke plate 17 horizontal motions, the stroke of stroke plate 17 motion is connected with three-position switch valve movement stroke, realized the motion of locking three-position interlocking plate 16 by three-position switch control.

As shown in Figure 3, when the closing and tripping plate 3 moves to the left, during the process from the moment when the closing and tripping can be realized to the time when the closing and tripping plate 3 moves to the bottom, even if the instant of closing and tripping triggers the crank arm 10 Quickly reach the position that can trigger the self-locking or closing position of the reclosing brake. The bent structure set at the end of the closing and tripping connector 4 will suppress the upward movement of the reclosing self-locking chain plate 8, and the trigger arm 10 will press against the reclosing trigger. The buffer screw 11 makes it move upwards, and the movement displacement is imposed on the reset compression spring 12 to compress it until the closing trip plate 3 returns and breaks away from the reclosing self-locking chain plate 8, under the action of the reset compression spring, The reclosing self-locking chain plate 8 quickly moves upwards to the closing operation movement path of the closing and tripping connector, and realizes reliable self-locking of the reclosing.

The closing trigger arm 10 has an immediate closing position (about to close), a just closing position (just closing but not fully in place) and a closing position (closing in place) in the closing movement direction, as shown in Figure 4. During the closing process, when the closing trigger arm 10 moves counterclockwise to the instant closing position, once the closing trip connector 4 is separated from the reclosing self-locking chain plate 8, reliable self-locking of the reclosing can be realized. The closing position is 13º from the just closing position and 25º from the closing position. If the circuit breaker is stuck on closing between the just-closed position and the closed position, the circuit breaker is already 13° ahead of the just-closed position to achieve reliable reclosing self-locking, preventing the mechanism from closing again. Indoor contact damage.

As shown in Figure 5, when the three-position trigger arm 13 moves counterclockwise to the position shown in the figure during the closing process, the three-position switch can be reliably locked (to prevent the three-position switch valve from opening and operating). The position shown in the figure is 14º from the just closed position and 30º from the closed position. If the circuit breaker is stuck on closing between the just-closed position and the closed position, the circuit breaker is 14° ahead of the just-closed position to reliably lock the three-position switch to prevent the three-position switch from being operated when the line is connected. , to avoid personal accidents.

As shown in Figure 6, the first fixed pin 9 is welded on the self-locking chain plate 8 of the reclosing gate, and the three-position locking plate 16 is connected to the first fixed pin 9. In the opening state, the first fixed pin 9 It is located at the lower end of the oblong hole on the locking three-station chain plate 16. When the three-position switch is operated at this time, the stroke plate 17 is pulled, and under the action of the fixed plate, the three-position chain plate 16 is driven to move upward, and the three-position chain plate 16 of the lockout drives the recloser automatically through the first fixed pin shaft 9. The lock interlocking plate 8 moves upwards to realize the function of the three-position switch in the opening state to lock the circuit breaker for closing operation. At the same time, as shown in the figure, this position is the position where the stroke plate moves to the position where the closing operation of the lockout circuit breaker can be realized. At this time, the stroke plate only moves less than half of the stroke, which improves the reliability of the cooperative operation of the three-position switch lockout circuit breaker .

As shown in Figure 7, when the circuit breaker is in the process of closing, once the locking three-position trigger lever 13 is in place, the locking three-position chain plate 16 can only move for a certain distance under the action of the stroke plate 17, as shown in the figure That is to lock the highest position of the three-position chain plate 16 moving upwards, and also the movable maximum stroke position of the travel plate 17, so that the three-position switch valve of the lock can not be opened, and the three-position switch cannot be operated.

Circuit breaker-an embodiment of a three-position switch device, the device includes a circuit breaker, a three-position switch and their interlocking devices, wherein the structures of the circuit breaker and the three-position switch are prior art, and will not be repeated here. The structure of the interlocking device is the same as that of the above-mentioned embodiment of the interlocking device, and will not be repeated here.

Claims (10)

1. The circuit breaker and three-position switch interlocking device is characterized in that it includes a side plate and a tripping assembly installed on the side plate, a circuit breaker reclosing self-locking assembly and a three-position switch interlocking assembly, and the tripping assembly Including the closing trigger arm, the circuit breaker reclosing self-locking component includes the reclosing lock trigger arm, the three-position switch interlocking component includes the three-position trigger arm for locking, the closing trigger arm, the reclosing lock trigger arm Arm and locking The three-position trigger arm is a coaxial and synchronous rotating arm. The closing trigger arm is sequentially provided with a just-closed position and a closing position along the action direction of the closing operation. The reclosing and locking trigger arm and the locking The respective trigger timings of the three-position trigger arms are all before the closing trigger arm reaches the just-closed position. 2. The circuit breaker and three-position switch interlocking device according to claim 1, characterized in that, the tripping assembly also includes a closing tripping piece, a closing tripping connector, a positioning piece and a cam, and the closing The tripping part, the closing and tripping connecting part and the positioning part are connected in sequence to form a four-bar linkage mechanism. The cam can be limited by the positioning part to support the energy storage position. After the cam is released from the limit position, it can be triggered by the cam surface and the closing position. The crank arm cooperates with pressing the crank arm assembly to reversely rotate. 3. The circuit breaker and three-position switch interlocking device according to claim 2, characterized in that the reclosing self-locking assembly also includes a self-locking interlocking plate, and the self-locking interlocking plate is perpendicular to the rotation axis of the closing trigger arm. The direction guide is assembled on the side plate and has a connecting part. When the closing and tripping connecting part moves to the closing position, and the self-locking interlock plate moves a set distance away from the closing trigger arm, the connecting The limit part of the closing part will be mutually pushed up and limited by the closing and tripping connecting part. When the reclosing locking trigger arm rotates with the closing triggering arm, it can push upward the elastic part set on the self-locking interlocking plate. When closing When the tripping connector is reset, the self-locking chain plate will act under the action of the elastic member and prevent the closing tripping connector from performing the closing operation again. 4. The interlocking device between a circuit breaker and a three-position switch according to claim 3, wherein the limiting portion of the connecting piece is formed by a bent portion of the self-locking interlocking plate near one end of the closing and tripping piece, A bending portion corresponding to the bending portion is provided on the closing and tripping connector. 5. The circuit breaker and three-position switch interlocking device according to claim 3, characterized in that, the elastic member includes a reset compression spring, and the reset compression spring is sleeved on a guide rod, the guide rod is a movable guide rod and its The movable direction is the same as that of the self-locking chain plate, and the reset clip spring is pushed between the guide rod and the self-locking chain plate. 6. The circuit breaker and three-position switch interlocking device according to claim 5, characterized in that a reset extension spring is provided between the self-locking interlock plate and the side plate, and the force value corresponding to the maximum stretching stroke of the reset extension spring It is less than the force value corresponding to the initial fixed position of the return compression spring. 7. The circuit breaker and three-station switch interlocking device according to claim 3, characterized in that the three-station switch interlock assembly also includes a three-station locking locking plate cooperating with the trigger arm of the three-station locking three-station, and three-station locking The position trigger crank arm is a hook-type crank arm, and the locking three-position chain plate and the self-locking chain plate are guided in the same direction and assembled on the side plate to form a self-locking chain plate that can only be driven by the locking three-position chain plate to move away from the coincidence Gate locking triggers the one-way transmission structure of the directional movement of the crank arm. 8 . The circuit breaker and three-position switch interlocking device according to claim 7 , wherein the hook portion of the locking three-position trigger arm has an arc-shaped inner surface extending along the hook portion. 9. The circuit breaker and three-station switch interlocking device according to claim 7, characterized in that, the end of the locking three-station interlocking plate far away from the locking three-station trigger arm is provided with a reversing mechanism, and the switching The direction mechanism includes a fixed plate and a travel plate that is assembled on the fixed plate and is used for connecting with the three-position switch valve. One of the travel plate and the three-position locking plate is provided with an arc-shaped hole, and the other is provided with a There is a radially movable guide pin matched with the arc-shaped hole. 10. Circuit breaker-three-position switch device, including circuit breaker, three-position switch and interlocking device, characterized in that the interlocking device includes a side plate and a tripping assembly installed on the mechanism side plate of the circuit breaker, and the circuit breaker recloses The brake self-locking component and the three-position switch interlocking component, the tripping component includes a trigger arm for closing, the circuit breaker reclosing self-locking component includes a reclosing lock trigger arm, and the three-position switch interlocking component includes a three-position The locking three-position trigger arm connected to the valve of the switch, the closing trigger arm, the reclosing locking trigger arm and the locking three-position trigger arm are coaxial and synchronous rotating crank arms, and the closing trigger arm The arms are sequentially provided with a just-closed position and a close-closed position along the action direction of the closing operation. The respective triggering timings of the reclosing locking trigger arm and the locking three-position trigger arm are all before the closing trigger arm reaches the just-closing position.