CN217822432U - Operating device of three-station isolation switch cabinet for rail transit - Google Patents

Abstract

The application discloses operating device of three station isolator cabinets for track traffic, including cam group and travel switch group, the cam group uses the drive shaft to rotate as the axle center along with the drive shaft, the cam group includes first cam and second cam, travel switch group includes first switch group and second switch group, first switch group and second switch group set up respectively in the motion stroke of first cam and second cam, first switch group triggers control signal along with the rotation of first cam, second switch group triggers control signal along with the rotation of second cam, the driver is suitable for receiving control signal and moves, can pass through the activity of long-range electrical connection control closing tool bit, but direct control driver stops the drive to closing tool bit when the drive shaft surpasss the rotation stroke of settlement, the response is accurate, control is timely.

Description

Operating device of three-station isolation switch cabinet for rail transit

Technical Field

The application relates to the technical field of outdoor high-voltage distribution equipment, in particular to an operating mechanism of a three-station isolating switch cabinet for rail transit.

Background

The switch cabinet is an electrical device, and the main function of the switch cabinet is to open and close, control and protect the electrical device in the process of generating, transmitting, distributing and converting electric energy of an electric power system. The components in the switch cabinet mainly comprise a circuit breaker, an isolating switch, a load switch, an operating mechanism, a mutual inductor, various protection devices and the like. The switch cabinets are classified into a movable switch cabinet and a fixed switch cabinet by a circuit breaker mounting mode; or according to different cabinet body structures, the cabinet body can be divided into an open type switch cabinet, a metal closed switch cabinet and a metal closed armored switch cabinet; the high-voltage switch cabinet, the medium-voltage switch cabinet, the low-voltage switch cabinet and the like can be divided according to different voltage grades.

The three-position switch integrates the functions of the isolating switch and the grounding switch and is completed by one knife, so that mechanical locking can be realized, the grounding knife is prevented from being closed by the main loop, the main knife can be the main knife and the grounding knife is the grounding knife, and misoperation can occur between the two knives unlike the traditional isolating switch because one knife can only be in one position. The three-position isolating switch is provided with one knife, the working position of the knife is unique at a certain moment, and the knife is not in the main brake switch-on position, but in the isolating position or the grounding position, so that the possibility of misoperation is avoided.

However, the existing three-position isolation switch cabinet has the following defects: since the cutter head of the three-position switch is usually controlled by the driving device, if the driving device fails, the cutter head may be accidentally switched on, so that the equipment is damaged, dangers are generated, and great loss is caused.

Disclosure of Invention

An aim at of this application provides a three-station isolation switch cabinet for track traffic with three-station switch activity limit function.

Another aim at of this application provides a stop gear who can carry out mechanical spacing track traffic with three-position isolator cabinet to three-position switch.

Still another aim at of this application provides one kind can carry out the spacing operating device of three station isolator cabinets for track traffic of electrical control to three station switches.

In order to achieve the above purpose, the technical scheme adopted by the application is as follows: the utility model provides an operating device of three station isolator cabinets for track traffic, includes cam group and travel switch group, the cam group uses the drive shaft to rotate as the axle center following the drive shaft, the cam group includes first cam and second cam, travel switch group includes first switch group and second switch group, first switch group with the second switch group set up respectively in the motion stroke of first cam and second cam, first switch group along with the rotation of first cam triggers control signal, the second switch group along with the rotation of second cam triggers control signal, the driver is suitable for receiving control signal moves.

As an improvement, the first switch group includes at least two first limit switches, the second switch group includes at least two second limit switches, first limit switch with the second limit switch encircle set up in around the drive shaft, first limit switch with when the quantity of second limit switch is two, at least one in first limit switch with first cam trigger control signal, at least one in the second limit switch with second cam trigger control signal, first limit switch with at least two in the second limit switch and at most three with cam group trigger control signal.

As an improvement, contact arms are arranged on the first switch group and the second switch group, and the contact arms are suitable for being pressed by the outer edge of the first cam or the second cam to swing and trigger a control signal.

Compared with the prior art, the beneficial effect of this application lies in: operating device can carry out the response of mechanical spacing stroke through setting up travel switch group to the activity of closing tool bit through the activity of long-range electrical connection control closing tool bit in the drive shaft, and recognition effect is better, but directly controls the driver and stops the drive to closing tool bit when exceeding the rotation stroke of settlement, and the mode of electrical apparatus control can not harm devices such as driver, and the response is accurate, and control is timely.

Drawings

FIG. 1 is a front view of a cabinet according to a preferred embodiment of the present application;

FIG. 2 isbase:Sub>A cross-sectional view taken along the line A-A of FIG. 1 in accordance withbase:Sub>A preferred embodiment of the present application;

FIG. 3 is an internal structural view of a cabinet according to a preferred embodiment of the present application;

FIG. 4 is an overall structural view of a drive shaft according to a preferred embodiment of the present application;

fig. 5 is a view of a connection structure when a manual stopper prevents a closing bit from moving to an isolation station according to a preferred embodiment of the present application;

fig. 6 is a view of a connection structure when a manual stopper prevents a closing bit from moving to a grounding station according to a preferred embodiment of the present application;

FIG. 7 is a view of the connection structure of the locking bar according to a preferred embodiment of the present application;

FIG. 8 is a cross-sectional view taken along the line B-B in FIG. 7 in accordance with a preferred embodiment of the present application;

FIG. 9 is a schematic structural view of a lock lever when locked according to a preferred embodiment of the present application;

FIG. 10 is a schematic illustration of the mating relationship of a first switch set and a first cam in accordance with a preferred embodiment of the present application;

FIG. 11 is a schematic illustration of the mating relationship of a second switch set and a second cam in accordance with a preferred embodiment of the present application;

fig. 12 is a schematic structural view of an operating mechanism when a closing bit is located at a switching-off station according to a preferred embodiment of the present application;

fig. 13 is a schematic view of an operating mechanism with a closing bit in an isolation station according to a preferred embodiment of the present application;

fig. 14 is a schematic view of an operating mechanism with a closing bit in a grounding station according to a preferred embodiment of the present application;

figure 15 is a schematic view of a rotational process of a drive arm according to a preferred embodiment of the present application.

In the figure: 1. a cabinet body; 11. a cabinet door; 12. an observation window; 13. a light source; 14. an illumination button; 15. a camera; 2. a three-position switch; 21. a closing tool bit; 22. an isolating switch; 23. a grounding switch; 3. a control device; 31. a driver; 32. a drive shaft; 33. a connecting rod assembly; 331. a drive arm; 332. a pull rod; 4. a limiting mechanism; 41. a manual stopper; 411. a limiting sleeve; 412. a limiting column; 4121. a locking groove; 4122. a first reset member; 413. a locking post; 4131. a second reset member; 42. a manual limit piece; 421. a first limiting part; 43. an automatic stopper; 431. a locking lever; 432. a locking seat; 433. a stabilizing base; 44. an automatic stopper; 5. an operating mechanism; 51. a first cam; 52. a second cam; 53. a first switch group; 531. a first limit switch; 54. a second switch group; 541. a second limit switch; 55. and a contact arm.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments described below or between the technical features may form a new embodiment.

In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.

It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The present application is further described with reference to the accompanying drawings:

as shown in fig. 1 to 15, a preferred embodiment of the present application includes a cabinet 1, a three-position switch 2, a control device 3, a limiting mechanism 4 and an operating mechanism 5 are disposed in the cabinet 1, the three-position switch 2 includes a closing tool bit 21, an isolating switch 22 and a grounding switch 23, the closing tool bit 21 is movably disposed in the cabinet 1, the closing tool bit 21 is adapted to form an isolating station at the isolating switch 22, the closing tool bit 21 is adapted to form a grounding station at the grounding station, the closing tool bit 21 is adapted to form an opening station between the isolating switch 22 and the grounding switch 23, the control device 3 includes a driver 31, a driving shaft 32 and a connecting rod assembly 33, the connecting rod assembly 33 connects the driving shaft 32 and the closing tool bit 21, the driver 31 is adapted to control the driving shaft 32 to rotate so that the closing tool bit 21 moves, the limiting mechanism 4 is adapted to prevent the closing tool bit 21 from moving to the isolating station or the grounding station, and the operating mechanism 5 is adapted to sense a rotation stroke of the driving shaft 32 to control the driver 31.

The link assembly 33 includes a driving arm 331 and a pull rod 332, the driving arm 331 is rotatably connected to the driving shaft 32, two ends of the pull rod 332 are respectively connected to the middle lower portion of the driving arm 331 and the middle lower portion of the closing tool bit 21, an activity process of the driving arm 331 is as shown in fig. 15, in an initial state of the driving arm 331, that is, when the closing tool bit 21 naturally drops to an opening station, an included angle between the driving arm 331 and a vertical direction is α =13 °, when the driving arm 331 needs to control and close the closing tool bit 21 to an isolation station, the driving arm 331 rotates β =51 ° to the left (clockwise), and when the driving arm 331 needs to control and close the closing tool bit 21 to a grounding station, the driving arm 331 rotates γ =59 ° to the right (counterclockwise).

Limiting mechanism 4 carries on spacingly through mechanical structure to three-position switch 2's active position, plays the effect of insurance, can prevent closing tool bit 21 toward keeping apart the station activity or toward the activity of ground connection station, can avoid leading to closing tool bit 21 unexpected closing because of reasons such as driver 31 trouble to make connected device damage, promotes the security.

The operating mechanism 5 can control the movement of the closing tool bit 21 through remote electrical connection, and performs mechanical limit stroke induction on the movement of the closing tool bit 21 by arranging the travel switch group on the driving shaft 32, so that the recognition effect is good, the driver 31 can be directly controlled to stop driving the closing tool bit 21 when the set rotation stroke is exceeded, devices such as the driver 31 cannot be damaged in an electrical appliance control mode, the induction is accurate, and the control is timely.

The limiting mechanism 4 and the operating mechanism 5 can be used independently, and can also be matched with each other to form an over-weight fuse, so that the closing and opening processes of the closing tool bit 21 are limited and induced, the moving range of the closing tool bit 21 is ensured to be within a controllable range, and the closing tool bit 21 is prevented from colliding.

The upper portion of closing tool bit 21 rotates and sets up in cabinet body 1, link assembly 33 is suitable for the lower part of control closing tool bit 21 and swings the combined floodgate between isolator 22 and earthing switch 23, closing tool bit 21 is suitable for and forms the separating brake station between isolator 22 and earthing switch 23, closing tool bit 21 flagging naturally under the separating brake state, do not need link assembly 33's support, when closing tool bit 21 loses link assembly 33's supporting effect, can become the separating brake state automatically under the influence of gravity, promote the safety in utilization, simultaneously this design can reduce the degree of difficulty of closing tool bit 21 activity between isolator 22 and earthing switch 23, link assembly 33 can be comparatively easy and accurate control closing tool bit 21 swings.

Be provided with cabinet door 11 on the cabinet body 1, at least one observation window 12 has been seted up around the cabinet body 1, observation window 12 is preferred to be set up on cabinet door 11, observation window 12 is suitable for observing three station switch 2, be provided with light source 13 in the cabinet body 1, light source 13 is suitable for illuminating three station switch 2, light source 13 is preferred to use the LED lamp, can set up illumination button 14 on the cabinet body 1, when pressing illumination button 14, light source 13 can be lighted, and observe three station switch 2's operating condition through observation window 12, be provided with camera 15 in the cabinet body 1, camera 15 is suitable for monitoring three station switch 2, can remotely observe three station switch 2's operating condition through camera 15 and the cooperation of light source 13, and control it, promote the safety in utilization.

As shown in fig. 4 to 6, the limiting mechanism 4 includes at least one manual limiting device 41 and at least one manual limiting device 42, the manual limiting device 41 and the manual limiting device 42 are disposed in a one-to-one correspondence manner, the manual limiting device 42 rotates along with the driving shaft 32, a first limiting portion 421 is disposed on the manual limiting device 42, the manual limiting device 41 is suitable for abutting against the first limiting portion 421 to prevent the manual limiting device 42 from rotating, the manual limiting device 42 is of a cam structure, the first limiting portion 421 is a protruding portion on the cam, the manual limiting device 41 can abut against the protruding portion to be clamped, the manual limiting device 41 can be operated to prevent the manual limiting device 42 from rotating, thereby preventing the driving shaft 32 from rotating, and achieving mechanical dead limiting of the closing tool bit 21, and the manual limiting device 41 can be operated on site.

Because the closing tool bit 21 swings back and forth between the isolating switch 22 and the grounding switch 23, the closing tool bit 21 needs to be limited on two swinging sides, the number of the manual limiting devices 41 and the manual limiting devices 42 is preferably two, the protruding parts of the two manual limiting devices 42 face opposite directions, so that the closing tool bit 21 can be respectively matched and abutted with the manual limiting devices 41 on an isolating station and a grounding station in the process of swinging back and forth closing, one manual limiting device 41 is suitable for being matched with one manual limiting device 42 to prevent the closing tool bit 21 from moving towards the isolating station, the other manual limiting device 41 is suitable for being matched with the other manual limiting device 42 to prevent the closing tool bit 21 from moving towards the grounding station, and the safety of the closing tool bit 21 is improved.

Manual stopper 41 includes stop collar 411, spacing post 412 and lock post 413, spacing post 412 slides and sets up in stop collar 411, spacing post 412 front end is suitable for and contradicts the joint with first spacing portion 421, lock post 413 sets up on stop collar 411 along stop collar 411 radial sliding, lock groove 4121 has been seted up on spacing post 412, lock post 413 is suitable for passing stop collar 411 joint to lock groove 4121 in, thereby spacing post 412 can realize preventing manual locating part 42 from rotating with the conflict of first spacing portion 421 through manual plug, lock post 413 can lock it when spacing post 412 conflicts, can promote spacing stability of spacing post 412.

The first reset piece 4122 is sleeved on the limiting column 412, a spring is preferably used as the first reset piece 4122, the first reset piece 4122 is suitable for preventing the limiting column 412 and the first limiting portion 421 from being clamped, the first reset piece 4122 can enable the limiting column 412 to automatically release the collision state when the locking of the locking column 413 is released, the situation that the limiting effect is still kept due to the fact that the collision state of the limiting column 412 is forgotten to be released is avoided, and the probability of misoperation is reduced.

The locking post 413 is sleeved with a second resetting piece 4131, the second resetting piece 4131 preferably uses a spring, the second resetting piece 4131 is suitable for preventing the locking post 413 from being disengaged from the locking groove 4121, the second resetting piece 4131 can enable the locking post 413 to keep a locking state until the locking post 413 is manually operated to be disengaged from the locking state, and meanwhile, when the limiting post 412 is limited, the second resetting piece 4131 can help the locking post 413 to be automatically locked, so that the operation difficulty is reduced, and the probability of misoperation is reduced.

As shown in fig. 7 to 9, the limiting mechanism 4 includes an automatic limiter 43, the automatic limiter 43 includes at least one telescopic locking rod 431, the locking rod 431 is controlled to be telescopic by using an air cylinder or a motor, the locking rod 431 is parallel to the driving shaft 32, an automatic limiting member 44 is disposed on the driving shaft 32, the automatic limiting member 44 rotates along with the driving shaft 32, the locking rod 431 is adapted to extend to the automatic limiting member 44 to prevent the rotation of the locking rod 431, and the automatic limiting of the closing tool bit 21 is realized by controlling the telescopic of the locking rod 431, which is simple in operation and stable in structure.

Since the closing bit 21 swings back and forth between the isolating switch 22 and the grounding switch 23, it is necessary to limit the swing of the closing bit 21 on both sides, so the number of the locking rods 431 is preferably two, the two locking rods 431 are suitable for respectively blocking the automatic limiting member 44 from rotating forward or backward, and correspondingly, the closing bit 21 is prevented from moving to the isolating station or the grounding station.

The automatic stopper 43 further comprises a locking seat 432 and a stabilizing seat 433, the locking rod 431 and the stabilizing seat 433 are respectively arranged on two sides of the automatic stopper 44, the locking rod 431 is suitable for being clamped in the locking rod 431 in an extending mode, the stabilizing seat 433 is suitable for guiding the locking rod 431 to extend into the locking seat 432, the locking seat 432 and the stabilizing seat 433 can both increase the structural stability of the locking rod 431, and the probability that the locking rod 431 is deformed due to the fact that the automatic stopper 44 is excessively large in rotating force can be reduced.

As shown in fig. 10 to 14, the operating mechanism 5 includes a cam group and a travel switch group, the cam group rotates along with the driving shaft 32 as an axis, the cam group includes a first cam 51 and a second cam 52, the travel switch group includes a first switch group 53 and a second switch group 54, the first switch group 53 and the second switch group 54 are respectively disposed in the movement strokes of the first cam 51 and the second cam 52, the first switch group 53 triggers a control signal along with the rotation of the first cam 51, the second switch group 54 triggers a control signal along with the rotation of the second cam 52, the driver 31 is adapted to receive the control signal to operate, the operating mechanism 5 receives the signal of the travel switch through the cooperation of the first switch group 53 and the first cam 51, and the second switch group 54 and the second cam 52, the driver 31 can finally obtain the movement trend and the current state of the closing bit 21 by distinguishing the difference in position and time when the control signal is received, and when the back movement of the closing bit 21 and the system setting are out of phase, the power can cut off the driving shaft 32 to stop the movement of the driving shaft, thereby avoiding the closing bit 21 from generating a greater closing loss in time.

The first switch group 53 and the second switch group 54 are provided with contact arms 55, the contact arms 55 are suitable for being pressed by the outer edges of the first cam 51 or the second cam 52 to swing and trigger a control signal, the first switch group 53 and the second switch group 54 can be tightly attached to the outer edges of the first cam 51 and the second cam 52 through the contact arms 55, a large stroke is obtained, the triggering accuracy is improved, and the states of the first cam 51 and the second cam 52 are prevented from being recognized by false induction.

The first switch group 53 includes at least two first limit switches 531, the second switch group 54 includes at least two second limit switches 541, the first limit switches 531 and the second limit switches 541 are disposed around the driving shaft 32, when the number of the first limit switches 531 and the second limit switches 541 is two, at least one of the first limit switches 531 and the first cam 51 trigger a control signal, at least one of the second limit switches 541 trigger a control signal with the second cam 52, at least two or at most three of the first limit switches 531 and the second limit switches 541 trigger a control signal with the cam group, the motion state and the motion position of the tool bit 21 are obtained by sensing the trigger state between each of the first limit switches 531 and the second limit switches 541, and the sensing process therebetween can be controlled by using a time relay.

As shown in fig. 10, the first switch group 53 is in the states of an isolation idle stroke, an isolation opening stroke and an isolation closing stroke from left to right in sequence.

As shown in fig. 11, the second switch group 54 is in the states of a grounding closing stroke, a grounding opening forming state and a grounding idle stroke from left to right in sequence.

Since the first cam 51 and the second cam 52 rotate synchronously with the driving shaft 32, the states of the first switch group 53 and the second switch group 54 change in a one-to-one correspondence manner, thereby determining the motion state of the closing bit 21.

The operating mechanism 5 operates on the following principle: setting a first switch group 53 to sense the switching-on and switching-off states of an isolation station, and setting a second switch group 54 to sense the switching-on and switching-off states of a grounding station;

as shown in fig. 12, when the closing tool bit 21 is in the initial state, the isolating station and the grounding station both belong to the opening state, only one first limit switch 531 and one second limit switch 541 of the first switch group 53 and the second switch group 54 on the same side are respectively triggered by cooperating with the first cam 51 and the second cam 52, and at this time, the other first limit switch 531 and the other second limit switch 541 should be respectively in the states of just being released from triggering and ready to enter triggering;

as shown in fig. 13, when the closing tool bit 21 closes at the isolation station, the driving shaft 32 rotates reversely, the first switch group 53 and the second switch group 54 respectively have a first limit switch 531 and a second limit switch 541 at different sides to be respectively triggered by the first cam 51 and the second cam 52 in a matching manner, the other second limit switch 541 is in an idle stroke, and when it is recognized that the other first limit switch 531 is separated from a triggered state in this state, it indicates that the closing tool bit 21 has completed closing with the isolation station, and at this time, the driver 31 needs to be controlled to stop;

as shown in fig. 14, when the closing tool bit 21 closes at the ground station, the driving shaft 32 rotates forward, the first switch group 53 and the second switch group 54 respectively have a first limit switch 531 and a second limit switch 541 at different sides to be respectively triggered by the first cam 51 and the second cam 52 in a matching manner, the other first limit switch 531 is in an idle stroke, and when the other second limit switch 541 is identified to be out of a triggering state in this state, it indicates that the closing tool bit 21 has completed closing and the ground station, and at this time, the driver 31 needs to be controlled to stop.

By the principle, the closing process of the closing tool bit 21 can be interfered, the closing tool bit 21 is prevented from moving to an isolation station or a grounding station, when the closing tool bit 21 is in an initial state, and the isolation station and the grounding station both belong to a switching-off state, if the first limit switch 531 which is not triggered preferentially triggers, the closing tool bit 21 performs the closing action of the isolation station, and if the system does not allow the closing of the isolation station, the driver 31 can be controlled to stop; if the second limit switch 541 that is not triggered is triggered preferentially, the closing bit 21 performs a closing operation of the ground station, and if the system setting does not allow the closing of the ground station, the driver 31 can be controlled to stop.

The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims (3)

1. The utility model provides an operating device of three station isolator cabinets for track traffic which characterized in that: the cam group comprises a first cam and a second cam, the travel switch group comprises a first switch group and a second switch group, the first switch group and the second switch group are respectively arranged in the movement strokes of the first cam and the second cam, the first switch group triggers a control signal along with the rotation of the first cam, the second switch group triggers the control signal along with the rotation of the second cam, and the driver is suitable for receiving the control signal to act.

2. The operating mechanism of a three-position isolating switch cabinet for rail transit as claimed in claim 1, characterized in that: first switch group includes two at least first limit switch, second switch group includes two at least second limit switch, first limit switch with second limit switch encircle set up in around the drive shaft, first limit switch with when second limit switch's quantity is two, in the first limit switch at least one with first cam trigger control signal, in the second limit switch at least one with second cam trigger control signal, first limit switch with in the second limit switch at least two and at most three and cam group trigger control signal.

3. The operating mechanism of a three-position isolating switch cabinet for rail transit as claimed in claim 1, characterized in that: the first switch group and the second switch group are provided with contact arms, and the contact arms are suitable for being pressed by the outer edges of the first cam or the second cam to swing and trigger control signals.

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