CN210866971U - Emergency brake-separating mechanism for high-voltage switch cabinet circuit breaker - Google Patents

Abstract

An emergency opening mechanism for a circuit breaker of a high-voltage switch cabinet is characterized in that a switch cabinet body is provided with a cabinet body front door, the circuit breaker is longitudinally movably arranged in the switch cabinet body, an inner button is arranged on the front side of the circuit breaker, and the cabinet body front door is provided with an outer button and a hollow circular sleeve; a circular transmission rod is also arranged in the switch cabinet body, and the circular transmission rod and the rear end part of the outer button are hinged together by utilizing a hinge shaft; the rear end part of the outer button is also provided with a limiting block for limiting the downward rotation amplitude of the circular transmission rod around the hinged shaft, a spring is arranged between the circular sleeve and the outer button, a spiral guide piece is fixedly arranged behind the left half side of the circular sleeve, a guide lug is arranged on the inner surface of the circular sleeve, a circular arc-shaped guide groove for embedding the guide lug is formed in the circumferential surface of the middle part of the outer button, and a longitudinal guide groove for embedding the guide lug is formed in the circumferential surface of the middle part of the outer button. The utility model discloses can make the transfer line descend more fast, and operation process is simple and convenient.

Description

Emergency brake-separating mechanism for high-voltage switch cabinet circuit breaker

Technical Field

The utility model belongs to the technical field of the mains switch cabinet, concretely relates to urgent separating brake mechanism of high tension switchgear circuit breaker.

Background

The circuit breaker of the high-voltage switch cabinet plays a role in controlling and protecting a load power supply, the circuit breaker can move longitudinally in the switch cabinet, a working position and a test position are formed in a longitudinally moving track, and the circuit breaker executes different functions at the working position and the test position respectively. As shown in fig. 2, when the circuit breaker 1 is in the operating position, the circuit breaker 1 is away from the front door 10 of the switchgear cabinet; as shown in fig. 1, when the circuit breaker 1 is in the test position, the circuit breaker 1 is close to the switchgear front door 10 (in order to reduce the longitudinal dimension of the switchgear body, the circuit breaker 1 in the test position is generally very close to the switchgear front door 10).

As shown in fig. 1, 2, 3 and 4, the front of the circuit breaker 1 is provided with an inner button 11, when an emergency situation occurs during the operation of the system, the circuit breaker 1 in the operating position needs to be manually opened, that is, the inner button 11 in the front of the circuit breaker 1 is pressed, but at this time, the circuit breaker 1 is in the operating position, the front door 10 of the switch cabinet is locked by the interlocking mechanism and is difficult to open (the task of the interlocking mechanism is to prevent the front door 10 of the switch cabinet from being opened when the circuit breaker is in the operating position), even if the front door 10 of the switch cabinet can be directly opened for operation, there is a certain danger, so that only the emergency operation can be performed outside the front door 10 of the switch cabinet, but because the circuit breaker 1 is far away from the front door 10 of the switch cabinet, a circular transmission rod 4 needs to be arranged between the inner button 11 of the circuit breaker 1 and the outer button 2 of the front door 10, so as to transmit the pressure of the outer push-button 2 to the inner push-button 11 of the front face of the circuit breaker 1, i.e. to press the inner push-button 11 of the front face of the circuit breaker through the rear end of the circular transmission rod 4. On the other hand, the circular transmission rod 4 must be moved away again to return to the sagging condition after the emergency operation, otherwise it would prevent the circuit breaker 2 from moving to the test position.

In order to realize the above function, the chinese utility model patent of CN202930810U discloses an urgent separating brake mechanism of handcart-type cubical switchboard circuit breaker, separating brake mechanism installs compression spring including twist grip, circular sleeve, button, bent plate and the transfer line that connects gradually between circular sleeve and the button, be equipped with first pin on the button, the one end of first pin runs through circular sleeve be equipped with in the circular sleeve and be used for spacing fixed block, first pin joint is in the spacing block, through second pin connection between button and the bent plate, through bolt a fixed connection between bent plate and the transfer line. Therefore, when the circuit breaker of the handcart type switch cabinet is in a working position and needs emergency opening, under the condition that the front door of the switch cabinet is not opened, the circular transmission rod 4 can be rotated 180 degrees around the central axis extending horizontally and longitudinally through manual operation outside the switch cabinet, the state shown in figure 2 is changed into the state shown in figure 3, then the circular transmission rod 4 is lowered to the horizontal state shown in figure 4 under the action of gravity, the button 2 (outer button) arranged on the front door of the cabinet body can be pressed, the circular transmission rod 4 is driven to move backwards, and the button (called as the inner button 11) arranged on the front face of the circuit breaker is touched through the rear end of the circular transmission rod 4, so that forced emergency opening of the circuit breaker in the cabinet is realized, and the safety of an operator and an electric power system is further ensured. In addition, after emergency opening, the circular transmission rod 4 can be rotated downwards to a sagging state, so that the test position of the circuit breaker handcart is avoided to be occupied, and the handcart type circuit breaker is pulled from the working position to the test position for maintenance.

In the above mechanism, after the outer button 2 is pressed backwards, if the rear end of the circular transmission rod 4 is aligned with the inner button 11 of the circuit breaker, the inner button of the circuit breaker also moves backwards, and the longitudinal distance between the outer button 2 and the triggered inner button 11 is kept equal to the longitudinal length of the circular transmission rod 4; however, assuming that the rear end of the circular transmission rod 4 is not aligned with the inner button 11 of the circuit breaker, the inner button 11 of the circuit breaker will remain stationary after the outer button 2 is pressed backward, and the longitudinal distance between the outer button 2 and the inner button 11 will be smaller than the longitudinal length of the circular transmission rod 4.

The above CN202930810U structure still has the following problems worth improving:

firstly, the descending action of the circular transmission rod is not ideally matched with the longitudinal action of the outer button at a time point, and the method comprises the following specific steps:

in order to reduce the longitudinal dimensions of the switchgear cabinet, the circuit breaker 1 in the test position is normally located very close to the front door 10 of the switchgear cabinet, and the circular transmission rod 4 is in a suspended state at approximately 90 ° to the horizontal plane (see lines 1-2 of paragraph 23 of the CN202930810U description), so that after the circular transmission rod 4 has been rotated 180 ° around the horizontal, longitudinally extending central axis, the circular transmission rod 4 remains close to the ground at 90 ° as shown in fig. 3, after which the circular transmission rod 4 descends under the influence of gravity, passing from the state shown in fig. 3 to the horizontal state shown in fig. 4 (see last sentence of paragraph 20 of the CN202930810U description).

However, in the descending process of the transmission rod, because the transmission rod only depends on self gravity, and the moment of gravity is very small (the moment arm is small) when the descending process starts, a long time (for example, about 0.7 second) is required for the circular transmission rod 4 to descend to the horizontal state; on the other hand, in an emergency situation, the operator can press the outer button 2 backwards as quickly as possible, and the time for moving the outer button 2 backwards to the proper position is short (for example, about 0.2 seconds), so that when the outer button 2 moves backwards to the proper position, the circular transmission rod 4 may not fall down to the proper position, and the circular transmission rod 4 which subsequently descends cannot fall down to the right front of the inner button 11, as shown in fig. 6, and thus the inner button 11 cannot be pressed backwards smoothly, that is, emergency opening cannot be performed smoothly.

In the emergency brake-separating process, an operator needs to operate two components (a rotary handle and a button), firstly rotate the handle by 180 degrees and then longitudinally press the button (see the 23 nd line 2 of the CN202930810U specification). However, it is difficult to ensure the correct operation sequence of the operator in an emergency state, and once the operation sequence is incorrect, the rear end of the circular transmission rod cannot smoothly push the inner button, so that the disposal time is delayed.

Thirdly, after emergency opening, the 'opening button is reset, the knob handle is rotated 180 degrees anticlockwise' so that the circuit breaker can be pulled out from the working position to the testing position (see the 23 rd line 3 and 4 of the CN202930810U specification). This means that the operator needs to keep in mind and implement "reset of the opening button followed by 180 ° rotation of the knob handle in order to pull the circuit breaker from the working position to the test position"; if the operator forgets that the 'opening button resets and rotates the knob handle 180 degrees anticlockwise', the circuit breaker is pulled forwards (aiming at pulling the circuit breaker out of the working position to the test position), the circular transmission rod is still in the horizontal state at the moment, and as shown in fig. 4, the circular transmission rod 4 still can be accidentally triggered to the inner button 11 of the circuit breaker, so that new danger is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the above problem and providing a high tension switchgear circuit breaker emergency opening mechanism, it can make the transfer line descend more fast, and the operation process is simple and convenient.

The purpose can be realized according to the following scheme: the emergency opening mechanism of the high-voltage switch cabinet circuit breaker comprises a switch cabinet body, wherein the switch cabinet body is provided with a cabinet body front door, the circuit breaker is arranged in the switch cabinet body in a longitudinally movable mode, an inner button is arranged on the front side of the circuit breaker, the cabinet body front door is provided with an outer button and a hollow circular sleeve, and the central axis of the circular sleeve is in the longitudinal direction; the outer button is divided into three parts from front to back, namely a front end part of the outer button, a middle part of the outer button and a rear end part of the outer button, the front end part of the outer button is exposed out of the front door of the cabinet body, the rear end part of the outer button is positioned in the switch cabinet body, and the circular sleeve is sleeved outside the middle part of the outer button; the outer button is positioned right in front of the inner button; a circular transmission rod is further arranged inside the switch cabinet body, the circular transmission rod and the rear end part of the outer button are hinged together through a hinge shaft, and the axial direction of the hinge shaft is perpendicular to the longitudinal direction and the long direction of the circular transmission rod; the rear end part of the outer button is also provided with a limiting block for limiting the downward rotation amplitude of the circular transmission rod around the hinge shaft, and the longitudinal position of the limiting block is more back than the hinge shaft;

the limiting block and the hinge shaft rotate around the central axis of the circular sleeve along with the outer button, when the limiting block rotates around the central axis of the circular sleeve to the rear lower part of the hinge shaft, the limiting block limits the downward rotation amplitude of the circular transmission rod around the hinge shaft, so that when the circular transmission rod rotates downwards around the hinge shaft to contact the limiting block, the circular transmission rod is in a horizontal state and cannot continue to rotate downwards;

a spring is arranged between the circular sleeve and the outer button, the spring is sleeved outside the middle part of the outer button and is sleeved inside the circular sleeve, the central axis of the circular sleeve is the central axis of the spring,

the first end of the spring and the circular sleeve form an axial fixed connection relation, the second end of the spring and the outer button form an axial fixed connection relation, the spring becomes a pressure spring connected between the circular sleeve and the outer button, and the direction of the spring applying elastic force to the outer button faces the front;

the main characteristics are as follows: the first end of the spring also forms a circumferential fixed connection relation with the circular sleeve, the second end of the spring also forms a circumferential fixed connection relation with the outer button, the spring is also used as a torsional spring connected between the circular sleeve and the outer button, and the torque direction of the spring applying torsion to the outer button is in an anticlockwise direction;

a spiral guide piece is fixedly arranged behind the left half side of the circular sleeve, the longitudinal projection shape of the spiral guide piece is arc-shaped, the arc center point of the arc is positioned on the central axis of the circular sleeve, the rear side edge of the spiral guide piece is spiral, and the spiral direction gradually retreats along the clockwise direction;

the inner surface of the circular sleeve is provided with a guide lug, the circumferential surface of the middle part of the outer button is provided with an arc-shaped guide groove for the guide lug to be embedded in, the extension direction of the arc-shaped guide groove is the circumferential direction of the middle part of the outer button, and the arc degree of the extension of the arc-shaped guide groove ensures that the outer button can be screwed for 180 degrees just relative to the circular sleeve; the starting end of the arc-shaped guide groove in the anticlockwise direction is called a first end, and the tail end of the arc-shaped guide groove in the anticlockwise direction is called a second end; the circumferential surface of the middle part of the outer button is also provided with a longitudinal guide groove for embedding the guide lug, and the rear end point of the longitudinal guide groove is overlapped with the second end point of the arc-shaped guide groove;

when the guide projection of the circular sleeve is positioned at the first end of the circular arc-shaped guide groove of the outer button, the limiting block of the outer button is positioned at the rear upper part of the articulated shaft, the articulated shaft is in a horizontal and transverse state, and the circular transmission rod is vertically suspended on the articulated shaft;

when the guide convex block of the circular sleeve is positioned at the second end of the circular arc-shaped guide groove of the outer button, the limiting block of the outer button is positioned behind and below the articulated shaft, and the articulated shaft is in a horizontal and transverse state;

when the guide projection of the circular sleeve is positioned at the second end of the circular arc-shaped guide groove of the outer button and the circular transmission rod is contacted with the rear side edge of the spiral guide piece, the circular transmission rod is inclined from the rear upper part to the front lower part.

In this document, the longitudinal direction refers to the direction in which the circuit breaker moves between the operating position and the test position, and the direction of movement from the operating position to the test position is forward, so that the test position is forward, the operating position is backward, and the circuit breaker is behind the front door of the switchgear. The lateral direction is a horizontal direction perpendicular to the longitudinal direction.

In this document, when the left-right direction is determined, the determiner stands outside the front door of the switch cabinet, faces the front door of the switch cabinet (i.e., faces backward), and uses the left side of the determiner as the left side and the right side of the determiner as the right side.

In this document, when the front and back directions are determined, the determiner stands outside the front door of the switch cabinet, facing the front door of the switch cabinet (i.e., facing backwards).

The first end of the spring and the circular sleeve form an axial fixed connection relationship, which means that the first end of the spring and the circular sleeve form a fixed connection relationship in the axial direction of the spring; similarly, the fact that the second end of the spring and the outer button form an axial fixed connection relationship means that the second end of the spring and the outer button form a fixed connection relationship in the axial direction of the spring.

The first end of the spring and the circular sleeve form a fixed connection in the circumferential direction, which means that the first end of the spring and the circular sleeve form a fixed connection in the circumferential direction of the spring (i.e. the first end of the spring and the circular sleeve cannot rotate relatively around the central axis of the spring); similarly, the fact that the second end of the spring and the outer button form a fixed connection in the circumferential direction means that the second end of the spring and the outer button form a fixed connection in the circumferential direction of the spring (that is, the second end of the spring and the outer button cannot rotate relatively around the central axis of the spring).

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

firstly, in emergency, the outer button can be screwed by 180 degrees clockwise urgently, the circular transmission rod is changed from a vertical suspension state (namely the fixed end of the circular transmission rod is arranged above and the free end of the circular transmission rod is arranged below) into an unstable inclined state (namely the fixed end of the circular transmission rod is arranged below and the free end of the circular transmission rod is arranged above the circular transmission rod in an inclined manner) in the screwing process, then the circular transmission rod is automatically descended from the unstable inclined state into a horizontal state, the outer button can be pushed to drive the circular transmission rod to move backwards, the rear end of the circular transmission rod pushes the inner button of the circuit breaker, and the circuit breaker in the switch cabinet is subjected.

Two, because the utility model discloses the fixed spiral guide vane that is equipped with in the back of the half left side of circular sleeve, consequently with traditional structure comparison, the utility model discloses a circular transfer line evolves to the time of horizontality from unstable inclined state by a wide margin and shortens, and this mainly has following three aspect reason:

in the traditional structure, the initial inclined angle of the circular transmission rod when the circular transmission rod descends is necessarily the same as the inclined angle when the circular transmission rod is hung, and the inclined angle when the circular transmission rod is hung needs to be taken care of to return to a test position, so that the initial inclined angle of the circular transmission rod when the circular transmission rod descends in the traditional structure is very small, and the rotating angle of the circular transmission rod in the descending process is large (about 90 degrees); in the utility model, the initial inclination angle of the circular transmission rod when descending has no corresponding relation with the inclination angle when hanging, and the initial inclination angle of the circular transmission rod when descending is 30-45 degrees, which means that the rotation angle of the circular transmission rod in the descending process is small, thus shortening the descending time;

secondly, in the traditional structure, the acceleration of the circular transmission rod just beginning to descend is small (because the inclination angle is small and is close to the vertical state, the moment is small); in the utility model, when the circular transmission rod just begins to descend, because the inclination angle reaches 30-45 degrees, the acceleration generated by gravity is large, in addition, due to the decomposition evolution effect of the spiral guide piece, the torsion force for twisting the outer button can be decomposed into the power for promoting the circular transmission rod to rotate downwards around the articulated shaft, so the acceleration of the circular transmission rod descending is large;

in the traditional structure, when the circular transmission rod just begins to descend, the initial speed of the rotation around the hinge shaft is zero; in the utility model, when the circular transmission rod just begins to descend, the circular transmission rod already has the initial angular velocity rotating around the articulated shaft;

due to the reasons of the three aspects, the time for the circular transmission rod to evolve from the inclined state to the horizontal state is greatly shortened, when an operator twists the outer button for 180 degrees to be in place, the circular transmission rod instantly drops to the horizontal state, so that before the outer button is pressed backwards to be in place, the circular transmission rod is in place in advance (namely is in the horizontal state), the rear end of the circular transmission rod is ensured to be aligned to the inner button of the circuit breaker, and the backward longitudinal pressure of the outer button can be transmitted to the inner button of the circuit breaker through the circular transmission rod;

thirdly, the utility model discloses an urgent separating brake action only needs a part of operation, and the order can not be wrong moreover, can only rotate outer button earlier, then promote outer button backward again (outer button can only be promoted backward after being rotated 180 degrees, otherwise can not promote backward, unless circular sleeve's direction lug is located the second extreme point of convex guide slot, otherwise circular sleeve's direction lug can not follow the vertical guide slot relative movement of outer button), avoid operating sequence mistake under the urgent in disorder condition.

Fourthly, the utility model discloses a after the urgent separating brake action, as long as loose hand, the longitudinal pressure of spring is automatic to promote outer button forward, circular sleeve's direction lug is for the longitudinal guide slot longitudinal movement of outer button, make circular sleeve's direction lug relative movement to the rear end of longitudinal guide slot (of course, it is in fact that outer button is moving forward, and the direction lug is fixed), then, the torsion of spring takes place to act on, make outer button automatic to the normal state position rotate, make circular sleeve's direction lug rotate to the first end of convex guide slot from the second end of convex guide slot relatively (of course, it is in fact that outer button is rotating, the direction lug is fixed), the stopper rotates to articulated shaft upper back around circular sleeve's the central axis, circular transfer line loses the support and falls from the horizontal position automatically and becomes the vertical suspension state, therefore, the utility model discloses need not the operating personnel to remember and implement "reset separating brake button earlier and suspend the state, Then knob handle rotates 180 degrees, can pull out the operation regulation of test position "with the circuit breaker from the operating position, avoids causing the secondary accident because of the error in this respect.

And fifthly, the circular transmission rod can rotate downwards to be in a vertical state at ordinary times, so that the circular transmission rod cannot occupy the test position of the circuit breaker handcart at ordinary times, and is in an absolute vertical state (rather than a slightly inclined state of a traditional structure) at ordinary times, so that the space is saved, and the reduction of the volume (longitudinal size) of the switch cabinet is facilitated.

And sixthly, the structure is obviously simplified, the number of parts is greatly reduced, and the like.

Drawings

Fig. 1 is a schematic diagram of the longitudinal position relationship of the circuit breaker in the test position with the front door of the cabinet.

Fig. 2 is a schematic diagram of the longitudinal position relationship of the circuit breaker in the operating position with the front door of the cabinet.

Figure 3 is a schematic view of the circular drive rod of figure 2 after being rotated 180 degrees about the longitudinal center axis of the sleeve.

Fig. 4 is a schematic view of the circular transmission rod of fig. 3 after it has been rotated about the transverse rotation axis to a horizontal position.

Fig. 5 is a schematic view of the outer push button of fig. 3 pressed backward into position while the circular transmission rod has not yet been lowered into position.

Fig. 6 is a schematic view of the circular transmission rod of fig. 3 after it is lowered.

Fig. 7 is a schematic view of the normal top view structure and the orientation relationship according to the embodiment of the present invention.

Fig. 8 is a schematic cross-sectional view of C-C in fig. 7.

Fig. 9 is a partially enlarged schematic view of fig. 7.

Fig. 10 is a partially enlarged schematic view of fig. 8.

Fig. 11 is a partially enlarged schematic view of the outer button of fig. 10.

Fig. 12 is a perspective view illustrating the outer button of fig. 10.

Fig. 13 is a schematic cross-sectional view D-D of fig. 10.

Fig. 14 is an enlarged schematic view of the middle portion of the outer button in fig. 13.

Fig. 15 is a perspective view of the outer button, the circular sleeve, and the circular transmission rod in a normal state.

Fig. 16 is a side view of the outer button, circular sleeve, circular drive rod in a normal state.

Fig. 17 is a schematic rear view of the outer push button, the circular sleeve and the circular transmission rod in a normal state.

Fig. 18 is a schematic perspective view of the outer button, the circular sleeve and the circular transmission rod when the rotation of the outer button is about to reach 180 degrees in the emergency brake-off process.

Fig. 19 is a schematic top view of the state shown in fig. 18.

FIG. 20 is a schematic cross-sectional view E-E of FIG. 19.

Fig. 21 is a schematic longitudinal sectional view of the outer push button, the circular sleeve and the circular transmission rod when the outer push button rotates to 180 degrees in the emergency brake-off process.

Fig. 22 is a perspective view of the circular drive link of fig. 21 after it has been lowered to a horizontal position.

Fig. 23 is a rear view schematically illustrating the state shown in fig. 22.

Fig. 24 is a schematic sectional view taken along line F-F in fig. 23.

FIG. 25 is a schematic sectional view taken along line G-G in FIG. 24.

Fig. 26 is a schematic top view of the structure shown in fig. 22.

Fig. 27 is a perspective view illustrating the structure of fig. 22 after an outer button is pressed backward.

Fig. 28 is a schematic sectional view of the structure shown in fig. 24 after the outer button is pressed backward.

Fig. 29 is a schematic top view of the arrangement of fig. 26 after the outer button has been pressed backwards.

Detailed Description

As shown in fig. 7, 8, and 9, the emergency opening mechanism of the high voltage switch cabinet circuit breaker of the embodiment includes a switch cabinet body, the switch cabinet body is provided with a cabinet front door 10, the circuit breaker 1 is installed inside the switch cabinet body in a longitudinally movable manner, the front of the circuit breaker 1 is provided with an inner button 11, the cabinet front door 10 is provided with an outer button 2 and a hollow circular sleeve 3, and the central axis of the circular sleeve 3 is vertical.

As shown in fig. 10, 11, 12 and 13, the outer button 2 is divided into three parts from front to back, namely, an outer button front end part 21, an outer button middle part 22 and an outer button rear end part 23, the outer button front end part 21 is formed into a handle, the handle is exposed out of the front door 10 of the cabinet body, the outer button rear end part 23 is positioned in the switch cabinet body, the circular sleeve 3 is sleeved outside the outer button middle part 22, and the cross section of the outer button middle part 22 is circular; the circular sleeve 3 is fixed on the front door 10 of the cabinet body and cannot rotate relative to the front door of the cabinet body, and the outer button 2 can move longitudinally relative to the circular sleeve 3 and can also rotate relative to the circular sleeve 3;

as shown in fig. 8, 10, 11, 15, 16, and 17, the outer push button 2 is located right in front of the inner push button 11 of the circuit breaker; a circular transmission rod 4 is further arranged inside the switch cabinet body, the circular transmission rod 4 and the rear end part of the outer button are hinged together through a hinge shaft 5, and the axial direction of the hinge shaft 5 is perpendicular to the longitudinal direction and is also perpendicular to the long direction of the circular transmission rod 4; the rear end part 23 of the outer button is further provided with a limiting block 6 for limiting the downward rotation amplitude of the circular transmission rod 4 around the hinge shaft 5, the longitudinal position of the limiting block 6 is more backward than the hinge shaft 5, the limiting block 6 and the hinge shaft 5 rotate around the central axis of the circular sleeve 3 along with the outer button 2, when the limiting block 6 rotates around the central axis of the circular sleeve 3 to the rear lower part of the hinge shaft 5, the limiting block 6 limits the downward rotation amplitude of the circular transmission rod 4 around the hinge shaft 5, so that when the circular transmission rod 4 rotates downwards around the hinge shaft 5 to contact the limiting block 6, the circular transmission rod 4 is in a horizontal state and cannot continue to rotate downwards, as shown in fig. 22 and 24;

as shown in fig. 10 and 21, a spring 7 is disposed between the circular sleeve 3 and the outer button 2, the spring 7 is sleeved outside the middle portion 22 of the outer button and inside the circular sleeve 3, the central axis of the circular sleeve 3 is the central axis of the spring 7, a first end of the spring 7 is axially fixedly connected with the circular sleeve 3, a second end of the spring 7 is axially fixedly connected with the outer button 2, the spring 7 is a pressure spring connected between the circular sleeve 3 and the outer button 2, and the direction of the spring 7 applying a spring force to the outer button 2 faces forward; the first end of the spring 7 is also in circumferential fixed connection with the circular sleeve 3, the second end of the spring 7 is also in circumferential fixed connection with the outer button 2, the spring is also used as a torsion spring between the circular sleeve and the outer button, and the torque direction of the spring 7 applying torsion to the outer button 2 is in an anticlockwise direction;

as shown in fig. 9, 10, 15, 16 and 17, a spiral guide piece 8 is fixedly arranged on the rear surface of the left half side of the circular sleeve 3, the longitudinal projection shape of the spiral guide piece 8 is circular arc, the circular arc center point of the circular arc is positioned on the central axis of the circular sleeve 3, the rear side edge (such as the edge AB in fig. 16 and 15) of the spiral guide piece 8 is spiral, the spiral direction is gradually retreated along the clockwise direction, and the longitudinal position of the point B is more rearward than the longitudinal position of the point a in fig. 16 and 15.

As shown in fig. 13, 10 and 20, the inner surface of the circular sleeve 3 is provided with a guide projection 31; as shown in fig. 10, 11, 12, 13 and 14, the circumferential surface of the middle portion 22 of the outer button is provided with an arc-shaped guide groove 9 for the guide protrusion 31 to be inserted into, the extending direction of the arc-shaped guide groove 9 is the circumferential direction of the middle portion 22 of the outer button, the starting end of the arc-shaped guide groove 9 in the counterclockwise direction is referred to as a first end 91, and the ending end of the arc-shaped guide groove 9 in the counterclockwise direction is referred to as a second end 92; and the arc-shaped guide groove 9 extends to have an arc such that the outer button 2 can be screwed by just 180 degrees relative to the circular sleeve (i.e. when the guide projection 31 moves relatively from the first end 91 to the second end 92 of the arc-shaped guide groove 9 during the relative rotation of the circular sleeve 3 and the outer button 2, the outer button rotates by 180 degrees); the peripheral surface of the middle portion 22 of the outer button is further provided with a longitudinal guide groove 90 for the insertion of the guide protrusion, the extending direction of the longitudinal guide groove 90 is longitudinal, the rear end point of the longitudinal guide groove 90 is overlapped with the second end point 92 of the arc-shaped guide groove, and when the guide protrusion 31 comes to the second end 92 of the arc-shaped guide groove, the rear end of the longitudinal guide groove 90 is equivalent.

When the guide projection 31 of the circular sleeve is located at the first end 91 of the circular arc-shaped guide groove of the outer button, the limiting block 6 of the outer button is located at the rear upper part of the hinge shaft 5, the hinge shaft 5 is in a horizontal and transverse state, and the circular transmission rod 4 is vertically suspended on the hinge shaft 5, as shown in fig. 10, 15, 16 and 17;

when the guide projection 31 of the circular sleeve is located at the second end 92 of the circular arc-shaped guide groove of the outer button, the limiting block 6 of the outer button is located behind and below the hinge shaft 5, and the hinge shaft 5 is in a horizontal and transverse state, as shown in fig. 22, 23, 24 and 25;

as shown in fig. 21, when the guiding protrusion 31 of the circular sleeve is located at the second end 92 of the circular arc-shaped guiding groove of the outer button and the circular transmission rod 4 contacts the rear edge of the spiral guiding piece 8, the circular transmission rod 4 is inclined at an angle of 40 °, and the inclined direction is inclined from the upper back to the lower front (i.e. the inclined angle of the MN line in fig. 21 is 40 °, and the inclined direction is inclined from the upper back to the lower front).

In this document, the longitudinal direction is the direction in which the circuit breaker 2 moves between the operating position and the test position, and the direction of movement from the operating position to the test position is forward, so that the test position is forward, the operating position is backward, and the circuit breaker 1 is behind the front door 10 of the switchgear cabinet, as shown in fig. 7, the direction indicated by the arrow q is forward, and the direction indicated by the arrow h is backward.

In this document, when the left-right direction is determined, the determiner stands outside the switch cabinet, faces the front door of the switch cabinet (i.e., faces backward), and the left side of the determiner is the left side, and the right side of the determiner is the right side, as shown in fig. 7, the direction indicated by the arrow z faces left, and the direction indicated by the arrow y faces right.

The principle of use of the above embodiment is as follows:

in a normal state, the circuit breaker 1 is located at a working position, the circuit breaker 1 is far away from the front door 10 of the switch cabinet, the guide projection 31 of the circular sleeve is located at the first end 91 of the circular arc-shaped guide groove of the outer button, the limiting block 6 of the outer button is located at the rear upper part of the hinge shaft 5, the hinge shaft 5 is in a horizontal and transverse state, and the circular transmission rod 4 is vertically suspended on the hinge shaft 5, namely the circular transmission rod 4 forms 90 degrees with the ground, as shown in fig. 7 to 17;

secondly, when the circuit breaker needs to be disconnected in an emergency, the outer button 2 can be turned clockwise in an emergency, in the turning process, the second end 92 of the arc-shaped guide groove of the outer button is gradually close to the guide lug 31 of the circular sleeve, the circular transmission rod 4 and the hinge shaft 5 rotate around the central axis of the circular sleeve 3, in the process, the circular transmission rod 4 contacts the rear side edge of the spiral guide piece 8, the circular transmission rod 4 rotates backwards around the hinge shaft 5 gradually, and the middle turning process is shown in fig. 18, 19 and 20; after the outer button 2 is screwed 180 degrees clockwise, the guide projection 31 of the circular sleeve is located at the second end 92 of the circular arc-shaped guide groove of the outer button, the stop block 6 of the outer button 2 is located behind and below the hinge shaft 5, the hinge shaft 5 is in a horizontal and transverse state, the circular transmission rod 4 is in an unstable inclined state, the inclined angle is 40 degrees, the inclined direction is inclined from the back upper side to the front lower side, the fixed end (N end) of the circular transmission rod 4 is located below and the free end (M end) of the circular transmission rod 4 is located above, as shown in fig. 21, the inclined angle of the MN connecting line is 40 degrees, at this moment, the circular transmission rod 4 already has an initial speed of rotating downwards, and instantaneously falls to a horizontal state under the action of gravity and is supported by the stop block 6 and is stabilized in the horizontal state, as shown in fig. 22, 23, 24, 25 and 26. On the other hand, when the hand feeling of the operator is received by the outer button 2 and is screwed 180 degrees to be in place, the outer button 2 applies backward pushing force to axially compress the spring 7, the outer button 2 and the circular transmission rod 4 move backward, the guide projection 31 moves relatively along the longitudinal guide groove 90 of the outer button, the rear end of the longitudinal guide groove 90 of the outer button gradually leaves away from the guide projection 31 of the circular sleeve in the moving process, and when the circular transmission rod 4 contacts the inner button 11 of the circuit breaker 1, the emergency manual opening operation of the circuit breaker in the switch cabinet can be realized, as shown in fig. 27, 28 and 29.

Thereafter, as soon as the operator releases the handle (front end 21 of the outer button) of the outer button 2, the longitudinal pressure of the spring 7 automatically pushes the outer button 2 forward, the guiding protrusion 31 of the circular sleeve moves longitudinally relative to the longitudinal guiding groove 90 of the outer button, so that the guiding protrusion of the circular sleeve moves to the rear end of the longitudinal guiding groove 90 (actually, the longitudinal guiding groove 90 of the outer button moves forward, and the guiding protrusion 31 is fixed), and then the state shown in fig. 22 and fig. 24 is formed, the torsion of the spring 7 starts to act, so that the outer button 2 automatically rotates to the normal position (i.e., rotates counterclockwise), so that the guiding protrusion 31 of the circular sleeve rotates from the second end 92 of the circular guiding groove to the first end 91 of the circular guiding groove (of course, the circular guiding groove 90 of the outer button rotates, and the guiding protrusion 31 is fixed), the stopper 6 rotates around the central axis of the circular sleeve 3 to the rear upper part of the hinge shaft 5, the circular transmission rod 4 is automatically dropped to be in a vertical suspension state after losing the support, and automatically returns to the state shown in the figures 8, 10, 15 and 16, so that the forward moving track of the circuit breaker is automatically avoided, and the circuit breaker is conveniently pushed forward to a test position for maintenance.

In the above embodiment, the inclination angle of the circular transmission rod 4 when contacting the rear side edge of the spiral guide piece 8 may be changed to 30 °, or 45 °, and so on.

Claims (1)

1. An emergency opening mechanism of a high-voltage switch cabinet circuit breaker comprises a switch cabinet body, wherein the switch cabinet body is provided with a cabinet body front door, the interior of the switch cabinet body is longitudinally movably provided with the circuit breaker, the front side of the circuit breaker is provided with an inner button, the cabinet body front door is provided with an outer button and a hollow circular sleeve, and the central axis direction of the circular sleeve is longitudinal; the outer button is divided into three parts from front to back, namely a front end part of the outer button, a middle part of the outer button and a rear end part of the outer button, the front end part of the outer button is exposed out of the front door of the cabinet body, the rear end part of the outer button is positioned in the switch cabinet body, and the circular sleeve is sleeved outside the middle part of the outer button; the outer button is positioned right in front of the inner button; a circular transmission rod is further arranged inside the switch cabinet body, the circular transmission rod and the rear end part of the outer button are hinged together through a hinge shaft, and the axial direction of the hinge shaft is perpendicular to the longitudinal direction and the long direction of the circular transmission rod; the rear end part of the outer button is also provided with a limiting block for limiting the downward rotation amplitude of the circular transmission rod around the hinge shaft, and the longitudinal position of the limiting block is more back than the hinge shaft;

the limiting block and the hinge shaft rotate around the central axis of the circular sleeve along with the outer button, when the limiting block rotates around the central axis of the circular sleeve to the rear lower part of the hinge shaft, the limiting block limits the downward rotation amplitude of the circular transmission rod around the hinge shaft, so that when the circular transmission rod rotates downwards around the hinge shaft to contact the limiting block, the circular transmission rod is in a horizontal state and cannot continue to rotate downwards;

a spring is arranged between the circular sleeve and the outer button, the spring is sleeved outside the middle part of the outer button and is sleeved inside the circular sleeve, the central axis of the circular sleeve is the central axis of the spring, the first end of the spring and the circular sleeve form an axial fixed connection relation, the second end of the spring and the outer button form an axial fixed connection relation, the spring becomes a pressure spring connected between the circular sleeve and the outer button, and the direction of the spring applying elastic force to the outer button faces the front;

the method is characterized in that: the first end of the spring also forms a circumferential fixed connection relation with the circular sleeve, the second end of the spring also forms a circumferential fixed connection relation with the outer button, the spring is also used as a torsional spring connected between the circular sleeve and the outer button, and the torque direction of the spring applying torsion to the outer button is in an anticlockwise direction;

a spiral guide piece is fixedly arranged behind the left half side of the circular sleeve, the longitudinal projection shape of the spiral guide piece is arc-shaped, the arc center point of the arc is positioned on the central axis of the circular sleeve, the rear side edge of the spiral guide piece is spiral, and the spiral direction gradually retreats along the clockwise direction;

the inner surface of the circular sleeve is provided with a guide lug, the circumferential surface of the middle part of the outer button is provided with an arc-shaped guide groove for the guide lug to be embedded in, the extension direction of the arc-shaped guide groove is the circumferential direction of the middle part of the outer button, and the arc degree of the extension of the arc-shaped guide groove ensures that the outer button can be screwed for 180 degrees just relative to the circular sleeve; the starting end of the arc-shaped guide groove in the anticlockwise direction is called a first end, and the tail end of the arc-shaped guide groove in the anticlockwise direction is called a second end; the circumferential surface of the middle part of the outer button is also provided with a longitudinal guide groove for embedding the guide lug, and the rear end point of the longitudinal guide groove is overlapped with the second end point of the arc-shaped guide groove;

when the guide projection of the circular sleeve is positioned at the first end of the circular arc-shaped guide groove of the outer button, the limiting block of the outer button is positioned at the rear upper part of the articulated shaft, the articulated shaft is in a horizontal and transverse state, and the circular transmission rod is vertically suspended on the articulated shaft;

when the guide convex block of the circular sleeve is positioned at the second end of the circular arc-shaped guide groove of the outer button, the limiting block of the outer button is positioned behind and below the articulated shaft, and the articulated shaft is in a horizontal and transverse state;

when the guide projection of the circular sleeve is positioned at the second end of the circular arc-shaped guide groove of the outer button and the circular transmission rod is contacted with the rear side edge of the spiral guide piece, the circular transmission rod is inclined from the rear upper part to the front lower part.

Images