CN110021494B

CN110021494B - Transmission system for grounding switch in switch cabinet and switch cabinet

Info

Publication number: CN110021494B
Application number: CN201810023692.XA
Authority: CN
Inventors: 李建中; 党贝贝; 丁益
Original assignee: Siemens AG
Current assignee: Siemens AG
Priority date: 2018-01-10
Filing date: 2018-01-10
Publication date: 2020-11-06
Anticipated expiration: 2038-01-10
Also published as: CN110021494A

Abstract

The invention relates to a transmission system for a grounding switch in a switch cabinet and the switch cabinet. When the first rotating member rotates, the first linkage assembly drives the second linkage assembly to rotate through the connecting piece, and the energy storage assembly stores energy firstly and then releases the energy to push the second rotating member to rotate. According to the invention, the grounding switch can be operated by adopting a transmission system with a simpler structure, and the reliability is high.

Description

Transmission system for grounding switch in switch cabinet and switch cabinet

Technical Field

The invention relates to the field of grounding switches, in particular to a transmission system for a grounding switch in a switch cabinet. The invention also relates to a switch cabinet adopting the transmission system.

Background

With the progress of the manufacturing process of the power equipment, the power supply quality of the power equipment is more and more stable, the automation degree of the power industry is higher and higher, and a lot of convenient services can be provided for human beings. The switch cabinet is widely applied to distribution and transformation in industries such as power plants, transformer substations, industrial and mining enterprises, railway transportation, high-rise buildings and the like, and generally comprises a cabinet body and a circuit breaker, wherein the circuit breaker is used for automatically switching the connection of a circuit to protect other electrical appliances of the circuit when an overcurrent condition occurs in the circuit. The earthing switch is arranged beside the disconnecting switches on the two sides of the circuit breaker and plays the role of earthing when the circuit breaker is overhauled.

Therefore, how to realize reliable operation of the grounding switch becomes a problem to be solved urgently.

Disclosure of Invention

In view of this, the invention provides a transmission system for an earthing switch in a switch cabinet and the switch cabinet, so as to realize reliable operation of the earthing switch and ensure safety factor of the switch cabinet.

The invention provides a transmission system for an earthing switch in a switch cabinet, wherein the switch cabinet is provided with a cabinet body, the earthing switch is positioned in the cabinet body, and the transmission system comprises: a first linkage assembly, a connector, a second linkage assembly, and an energy storage assembly. The first linkage assembly comprises a handle operating shaft and a first rotating piece, one end of the handle operating shaft is used for fixing an operating handle, and the other end of the handle operating shaft is fixed at one end of the first rotating piece; one end of the connecting piece is hinged with the other end of the first rotating piece, and the other end of the connecting piece is provided with a first sliding pin; the second linkage assembly comprises a grounding operation shaft and a second rotating part, the second rotating part is fixed on the grounding operation shaft and is provided with a first sliding groove, and the first sliding pin is positioned in the first sliding groove; an energy storage assembly is engaged with the second linkage assembly.

When the first rotating member rotates, the first linkage assembly drives the second linkage assembly to rotate through the connecting piece, and the energy storage assembly stores energy firstly and then releases the energy to push the second rotating member to rotate.

According to the invention, the control of the grounding switch can be completed and the possible injury to an operator caused by the sudden acceleration of the second linkage assembly can be avoided through the first linkage assembly, the connecting piece with the first sliding pin and the second linkage assembly with the first sliding groove. The structure is simple, the transmission reliability can be improved, and the cost is low.

The transmission system according to the above optionally further comprises a ratchet wheel, a first pawl and a second pawl. The ratchet wheel is fixed on the handle operating shaft and can rotate along with the handle operating shaft; the first pawl is fixed on the cabinet body and can block the ratchet wheel from rotating in a first direction; the second pawl is fixed to the cabinet body and can block the rotation of the ratchet wheel in a second direction, and the first direction is opposite to the second direction.

The ratchet wheel, the first pawl and the second pawl are additionally arranged in the transmission system, so that the first linkage assembly can only rotate towards one direction, the condition that an operator operates the first linkage assembly to rotate in the reverse direction midway is avoided, the grounding switch can be enabled to be located at a switch-on position or a switch-off position, and the personal safety of the operator is guaranteed.

According to the transmission system as described above, optionally, the first pawl has a first flange that extends between two teeth of the ratchet wheel, the first flange being movable away from the ratchet wheel during rotation of the first pawl in the first direction to allow rotation of the ratchet wheel in the first direction; the second pawl has a second flange that extends between the two teeth of the ratchet wheel, and the second flange is movable away from the ratchet wheel during rotation of the second pawl in the second direction to allow rotation of the ratchet wheel in the second direction.

The transmission system according to the above optionally further comprises a first slide and a second slide. Wherein the first slider is located inside the cabinet and has a first protrusion and a second protrusion, and the first pawl and the second pawl are both located between the first protrusion and the second protrusion; the second sliding piece is positioned on the outer side of the cabinet body and connected with the first sliding piece; when the second sliding part moves, pushing force can be applied to the first pawl by driving the first sliding part to move, so that the first pawl rotates along the first direction, or when the second sliding part moves, pushing force can be applied to the second pawl by driving the first sliding part to move, so that the second pawl rotates along the second direction. The first sliding part is driven by the second sliding part to push the first pawl or the second pawl, so that operation of an operator can be facilitated.

According to the transmission system as described above, optionally, a shutter and a second slider are further included. The movable door is connected with the second sliding piece and can cover an operation hole in the cabinet body, and the operation handle operates the first linkage assembly through the operation hole; the second sliding part can drive the valve to move between a covering position covering an operation hole and an avoiding position avoiding the operation hole when sliding, and when the first sliding part moves from an initial position to the first pawl or one of the second pawls, the valve moves from the covering position to the avoiding position. Thus, misoperation of an operator is further avoided.

According to the transmission system, optionally, the energy storage assembly comprises two third rotating members arranged oppositely, a first pin, a first connecting portion, a guide member and a spring. The third rotating piece is fixed on the grounding operation shaft; the first pin shaft is fixed between the two third rotating pieces; the first connecting part is fixed between the two third rotating parts and is provided with a first through hole; one end of the guide piece is sleeved on the first pin shaft and penetrates through the first through hole. The spring is sleeved on the guide piece and can be compressed or released along with the rotation of the grounding operation shaft.

The transmission system according to the above optionally further comprises two first fixing members and one second connecting member. Wherein, the first fixed part is fixed in the cabinet body; the second connecting portion is fixed in between two first mounting and has a second through-hole, the extending direction of second through-hole with the extending direction of first through-hole is the same, another tip of guide wears to locate the second through-hole, the spring is located first connecting portion with between the second connecting portion.

According to the transmission system as described above, optionally, a moving distance of the grounding switch from the closing position to a dead point position is greater than a moving distance of the movable contact from the dead point position to the opening position, and when the grounding switch is located at the dead point position, a straight line formed by two end points of the guide passes through an axis of the grounding operation shaft. Like this, can guarantee earthing switch's snap-on, and then ensure operating personnel's personal safety.

According to the transmission system as described above, optionally, the second linkage assembly further includes another second rotating member, the another second rotating member has another first sliding slot, the first sliding pin is further disposed through the another first sliding slot, and the connecting member is located between the second rotating member and the another second rotating member. Thus, the moving direction of the link can be ensured as much as possible.

According to the transmission system as described above, optionally, the ground engaging operating shaft is square in cross-section. Like this, not only be convenient for the moving contact install in this ground connection operation axle, but also can adjust the moving contact position through set up the through-hole on the ground connection operation axle for the installation of moving contact is convenient more and accurate, guarantees earthing switch's wholeness ability.

A second aspect of the invention provides a switchgear cabinet having a cabinet body including an earthing switch according to any one of the above. According to the invention, the control of the grounding switch can be completed and the possible injury to an operator caused by the sudden acceleration of the second linkage assembly can be avoided through the first linkage assembly, the connecting piece with the first sliding pin and the second linkage assembly with the first sliding groove. And its simple structure can improve driven reliability, and the cost is lower, and then ensures cubical switchboard's factor of safety.

The switch cabinet optionally further comprises an operating handle, which has a first matching component, the first matching component can be matched with a second matching component on the cabinet body of the switch cabinet, when the first matching component and the second matching component are located at corresponding positions, the operating handle can be moved out of or inserted into the cabinet body, and the corresponding positions correspond to the switch-on position or the switch-off position. Therefore, the operating handle can be moved out after the operating personnel operates the grounding switch in place, and the personal safety of the operating personnel is ensured.

According to the switch cabinet, optionally, the first matching part is a protruding block and the second matching part is a notch, or the first matching part is a notch and the second matching part is a protruding block.

The switch cabinet according to the above, optionally, further comprises a viewing hole located on a front plate of the cabinet body and corresponding to a contact position of a ratchet wheel and one of a first pawl and a second pawl, the ratchet wheel is fixed to the first rotating member and can rotate along with the first rotating member, the first pawl and the second pawl are both fixed to a cabinet body, the first pawl can block rotation of the ratchet wheel in a first direction, and the second pawl can block rotation of the ratchet wheel in a second direction, the first direction is opposite to the second direction. The contact condition of the first pawl and the ratchet wheel or the contact condition of the second pawl and the ratchet wheel can be observed from the observation hole, so that installation and debugging of an installer are facilitated.

Drawings

The foregoing and other features and advantages of the invention will become more apparent to those skilled in the art to which the invention relates upon consideration of the following detailed description of a preferred embodiment of the invention with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural diagram of a transmission system according to an embodiment of the present invention;

FIG. 2 is a schematic illustration of a portion of a transmission system according to an embodiment of the present invention;

3-5 are schematic diagrams of the motion of a transmission system according to another embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a transmission system according to yet another embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a transmission system according to yet another embodiment of the present invention.

Reference numerals

100 operating handle

1001 bump

101 first linkage assembly

1011 handle operating shaft

1012 first rotating member

102 connecting piece

1021 first sliding pin

103 second linkage assembly

1031 ground connection operating shaft

1032 second rotating member

1033 axis of grounded operating shaft

1034 first sliding groove

1041 third rotating member

1042 third rotating part

1043 first hinge pin

1044 first connection part

1045 guide member

1046 second chute

1047 spring

1051 first fixing piece

1052 first fixing part

1053 second connecting part

1055 second sliding pin

200 moving contact

301 ratchet

302 first pawl

3021 first Flange

303 second pawl

3031 second Flange

304 first torsion spring

305 second torsion spring

500 first slider

501 first projection

502 second projection

503 second slide member

504 second fixing piece

505 interlocking parts

506 trap door

507 third sliding pin

508 rotating shaft

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by referring to the following examples.

Example one

The present embodiments provide a transmission system for an earthing switch in a switchgear cabinet having a cabinet body, the earthing switch being located in the cabinet body of the switchgear cabinet. As shown in fig. 1, the transmission system includes a first linkage assembly 101, a connector 102, a second linkage assembly 103, and an energy storage assembly.

The first linkage assembly 101 includes a handle operation shaft 1011 and a first rotating member 1012, wherein one end of the handle operation shaft 1011 is used for fixing the operation handle 100, and the other end of the handle operation shaft 1011 is fixed to one end of the first rotating member 1012. The handle operating shaft 1011 and the operating handle 100 are fixed in many ways, for example, as shown in fig. 2, the operating handle 100 has a projection 1001, and the projection 1001 is matched with a notch 1013 on the handle operating shaft 1011, so that the operating handle 100 can drive the handle operating shaft 1011 to rotate. The first rotating member 1012 rotates accordingly. It should be noted that, the fixing between the handle operating shaft 1011 and the operating handle 100 means that the operating handle 100 can operate the handle operating shaft 1011, that is, an operator can drive the handle operating shaft 1011 to rotate through the operating handle 100, and then operate the grounding switch, and the fixing mode may be clamping. When the operator does not need to operate the ground switch any more, the operation handle 100 can be separated from the handle operation shaft 1011. Further, the first rotating member 1012 and the handle operating shaft 1011 may be a single integral component, i.e., they are integrally formed. Of course, the first rotor 1012 and the handle operating shaft 1011 may be assembled as separate bodies.

One end of the connecting member 102 is hinged to the other end of the first rotating member 1012, and the other end of the connecting member 102 has a first sliding pin 1021. The connecting member 102 may be a single piece or may be formed by combining a plurality of pieces. For example, when the length of the connecting member 102 is long, it can be easily installed by splicing a plurality of members.

The second linkage assembly 103 includes a ground operating shaft 1031 and a second rotating member 1032. The second rotating member 1032 is fixed to the ground operating shaft 1031 and has a first sliding groove 1034, and the first sliding pin 1021 is located in the first sliding groove 1034. In this embodiment, the second linkage assembly 103 may include another second rotating component 1032, the another second rotating component 1032 has another first sliding slot, the first sliding pin 1021 is further disposed through the another first sliding slot, and the connecting element 102 is located between the second rotating component 1032 and the another second rotating component 1032. In this way, the movement position of the link 102 can be controlled as much as possible. Alternatively, as shown in fig. 1 to 5, the section of the ground operation shaft 1031 of the present embodiment may be square. Like this, not only be convenient for moving contact 200 to install in this ground connection operation axle 1031, but also can adjust moving contact 200 position through set up through-hole 1035 on ground connection operation axle 1031 for moving contact 200's installation is more convenient and accurate, guarantees earthing switch's wholeness ability. The movable contacts 200 may be secured in the through holes 1035 by bolts. Of course, the cross section of the grounding operation shaft 1031 may also be in any other shape such as a circle, a triangle, etc., which is not described in detail in this embodiment.

The energy storage assembly is engaged with the second linkage member 103. The energy storage assembly can be implemented in many ways as long as energy storage and subsequent energy release along with the rotation of the second linkage assembly 103 can be realized. For example, as shown in fig. 3-5, the energy storage assembly includes a third rotating member 1041, a third rotating member 1042, a first pin 1043, a first connecting portion 1044, a guide 1045, and a spring 1047. The third rotating member 1041 and the third rotating member 1042 are disposed opposite to each other and are fixed to the ground operating shaft 1031. Specifically, the third rotating member 1041 and the third rotating member 1042 are both vertically fixed to the ground operating shaft 1031. The first pin 1043 is fixed between the third rotating member 1041 and the third rotating member 1042. The first connecting portion 1044 is fixed between the third rotating member 1041 and the third rotating member 1042 and has a first through hole; one end of the guide 1045 is sleeved on the first pin 1043 and penetrates through the first through hole. The spring 1047 is sleeved on the guide 1045 and can be compressed or released along with the rotation of the ground operation shaft 1031. The guiding element 1045 may be a guiding rod, and the guiding rod may have a second sliding slot 1046. The direction of movement of the guide 1045 can be controlled by the sliding of a second slide pin 1055 in a second slide slot 1046. The spring 1047 is sleeved on the guide 1045, and the compression direction and the release direction of the spring 1047 can be controlled, so that the energy released by the spring 1047 can be applied to a component needing to be pushed as much as possible. Specifically, the other end of the guide 1045 may be fixed to the second slide pin 1055, so that the spring 1047 may be compressed or released along the guide 1045 with the movement of the second slide pin 1055.

Optionally, a first fixing member 1051 and a first fixing member 1052 may be fixed on the cabinet. A second connecting portion 1053 is fixed between the first fixing member 1051 and the first fixing member 1052 and has a second through hole. The first anchor 1051 and the first anchor 1052 may be integrally formed or may be separate members. As shown in fig. 3 to 5, the first fixing member 1051 and the first fixing member 1052 are integrally formed, and further, a back plate is further provided, and the first fixing member 1051 and the first fixing member 1052 are fixed on the back plate, so that the first fixing member 1051 and the first fixing member 1052 can be fixed on the cabinet body through the back plate. The extending direction of the second through hole is the same as the extending direction of the first through hole. The other end of the guide 1045 penetrates through the second through hole, and the spring 1047 is located between the first connecting portion 1044 and the second connecting portion 1053. Since the spacing between the first coupling portion 1044 and the second coupling portion 1053 varies with the rotation of the second linkage assembly 103, the spring 1047 is compressed or released. Alternatively, the second slide pin 1055 may be fixed between the first fixing member 1051 and the first fixing member 1052.

By adopting the above structure, the grounding switch can be operated between the switching-on position where the movable contact 200 contacts with a fixed contact (not shown) and the switching-off position where the movable contact 200 is separated from the fixed contact by rotating the first rotating member 1012 through the operating handle 100, when the first rotating member 1012 rotates, the first linkage assembly 101 drives the second linkage assembly 103 to rotate through the connecting member 102, and in the process, the energy storage assembly stores energy firstly and then releases energy to push the second rotating member 1032 to rotate.

For example, when the operator needs to operate the grounding switch, the operating handle 100 is inserted into the cabinet and fixed to the handle operating shaft 1011. As shown in fig. 3, the grounding switch is in the switching-on position at the connection position of the front moving contact 200 and the fixed contact. When the operator rotates the operating handle 100 counterclockwise to operate the grounding switch to the open position, the handle operating shaft 1011 rotates counterclockwise and drives the first rotating member 1012 to rotate counterclockwise. The connecting member 102 moves downward integrally to drive the second rotating member 1032 to move counterclockwise. As can be seen in fig. 3, first slide pin 1021 of link 102 is located at a lowest point of first runner 1034, e.g., the leftmost side of first runner 1034 as shown in fig. 3. During the movement of the earthing switch from the on position to the off position, a dead center position is passed. When the grounding switch is in the dead-center position, a straight line formed by both end points of the guide bar 1045 passes through the axis 1033 of the grounding operation shaft 1031. That is, an extension line of the guide lever 1045 passes through the axis 1033 of the ground operation shaft 1031. In the dead point position, the compression degree of the spring 1047 is maximum, and when the grounding switch continues to open the brake and turns to the dead point position, the spring 1047 releases a small part of energy to make the grounding operation shaft 1031 rotate to the open brake position rapidly and keep the position. That is, the moving speed of the earthing switch from the closing position to the dead point position is lower than the moving speed from the dead point position to the opening position. The first sliding groove 1034 is configured to prevent the second rotating member 1032 from driving the connecting member 102 to accelerate suddenly when accelerating suddenly, so as to avoid the situation that the rotating speed of the operating handle 100 is increased suddenly and the operator is injured. As shown in fig. 4, the grounding switch is at the open position, and the first sliding pin 1021 is at the lowest point of the first chute 1034. It should be noted that when the spring 1047 releases a portion of energy to push the ground operating shaft 1031 to rotate rapidly to the opening position, since the sliding speed of the first sliding pin 1021 does not change, it will have a certain distance from the lowest point of the first chute 1034, and then along with the rotating operation of the operator, the first sliding pin 1021 will gradually slide to the lowest point of the first chute 1034 and be kept at the opening position by gravity, as shown in fig. 4.

When the operator rotates the operating handle 100 clockwise to move the earthing switch from the open position to the closed position, the earthing switch also passes a dead-center position in the process. As shown in fig. 5, the first linkage assembly 101 rotates clockwise, so as to drive the connecting member 102 to move upward integrally, and the first sliding pin 1021 reaches the vertex of the first sliding slot 1034, i.e. the rightmost side of the first sliding slot 1034. The second rotation member 1032 rotates clockwise along with the movement of the connection member 102, and thus the second linkage assembly 103 rotates clockwise. Before the earthing switch reaches the dead-center position, the spring 1047 is gradually compressed, continuing to store energy. After the grounding switch passes the dead-center position, the spring 1047 is released, and the released energy is used to push the second linkage assembly 103 to rotate clockwise. The first sliding groove 1034 is configured to prevent the second rotating member 1032 from driving the connecting member 102 to accelerate suddenly when accelerating suddenly, so as to avoid the situation that the rotating speed of the operating handle 100 is increased suddenly and the operator is injured. As shown in fig. 3, the grounding switch is at the closing position, and the first sliding pin 1021 returns to the lowest point of the first sliding chute 1034, i.e. the first sliding pin 1021 returns to the leftmost side of the first sliding chute 1034.

The operation process can realize the slow opening and the quick closing of the grounding switch. That is, in the process of moving the earthing switch from the on position to the off position, the moving speed from the on position to the dead point position is lower than the moving speed from the dead point position to the on position. Therefore, the switch cabinet closing function is realized. Optionally, a moving distance of the grounding switch from the closing position to a dead point position is greater than a moving distance of the movable contact from the dead point position to the opening position. Therefore, the closing speed of the grounding switch can be further improved, and the personal safety of operators is ensured.

The transmission system of the present embodiment can complete the control of the ground switch through the first linkage assembly 101, the connection member having the first sliding pin 1021, and the second linkage assembly 103 having the first sliding slot 1034, and can avoid the possible injury to the operator due to the sudden acceleration of the second linkage assembly 103. The structure is simple, the transmission reliability can be improved, and the cost is low.

Example two

The present embodiment provides a further supplementary explanation of the transmission system of the first embodiment.

In actual operation, the operator may first rotate the operating handle 100 to operate the grounding switch to move from the on position to the off position. However, when the operation is half, the operator does not want to continue the operation, and therefore, the operation handle 100 is rotated in the reverse direction in anticipation of operating the earthing switch to the on position. However, due to the existence of the first sliding channel 1034, the connecting member 102 may not drive the second rotating member 1032 to rotate when operating in the reverse direction, and therefore, the grounding switch may not be in the switching-on position, which may cause injury to the personal safety of the operator.

To avoid the above safety hazard, as shown in fig. 6, the transmission system of the present embodiment further includes a ratchet 301, a first pawl 302, and a second pawl 303. The ratchet 301 is fixed to the handle operation shaft 1011 and can rotate along with the handle operation shaft 1011. The first pawl 302 is fixed to the cabinet and blocks rotation of the ratchet 301 in a first direction. The second pawl 303 is fixed to the cabinet and blocks rotation of the ratchet 301 in a second direction, the first direction being opposite to the second direction. The first pawl 302 and the second pawl 303 may specifically be fixed to a front plate of the cabinet.

There are many ways in which the first pawl 302 and the second pawl 303 block the rotation of the ratchet wheel 301. For example, the first pawl 302 and the second pawl 303 may each have a telescoping portion that blocks rotation of the ratchet 301 when the telescoping portion is extended. Of course, the first pawl 302 and the second pawl 303 may also be configured as shown in fig. 6. That is, the first pawl 302 has a first flange 3021, the first flange 3021 being extendable between two teeth of the ratchet wheel 301, and during rotation of the first pawl 302 in the first direction, the first flange 3021 being movable away from the ratchet wheel 301 such that the ratchet wheel 301 is rotatable in the first direction; the second pawl 303 has a second flange 3031, the second flange 3031 being extendable between two teeth of the ratchet wheel 301, and the second flange 3031 being movable away from the ratchet wheel 301 during rotation of the second pawl 303 in the second direction to allow rotation of the ratchet wheel 301 in the second direction. For example, as shown in fig. 6, when the first pawl 302 rotates counterclockwise, the first flange 3021 moves away from the ratchet wheel 301, and the ratchet wheel 301 may rotate in the counterclockwise direction. When the second pawl 303 is rotated clockwise, the first flange 3031 moves away from the ratchet wheel 301, at which time the ratchet wheel 301 may be rotated in a clockwise direction.

In this way, when it is necessary to rotate the first linkage assembly 101 in the first direction, the first pawl 302 is located at a position that does not block the rotation of the ratchet 301 in the first direction, so that the normal rotation of the first linkage assembly 101 in the first direction can be ensured, and the rotation of the first linkage assembly 101 in the second direction can be avoided. Similarly, when the first linkage assembly 101 needs to be rotated in the second direction, the second pawl 303 is located at a position that does not block the rotation of the ratchet 301 in the second direction, so that the normal rotation of the first linkage assembly 101 in the second direction can be ensured, and the rotation of the first linkage assembly 101 in the first direction can be avoided. Namely, the unidirectional rotation of the first linkage assembly 101 is ensured, so that the grounding switch can be operated in place.

Optionally, a first torsion spring 304 is disposed on the first pawl 302 to return the first pawl 302; a second torsion spring 305 is provided on the second pawl 303 which can reset the second pawl 303. In particular, how the first torsion spring 304 resets the first pawl 302 and how the second torsion spring 305 resets the second pawl 303 belong to the prior art, and are not described herein again.

Optionally, the transmission system of the present embodiment further includes a first sliding member 500 and a second sliding member 503. The first slider 500 is located inside the cabinet, i.e. inside one of the panels. The first slider 500 has a first projection 501 and a second projection 502, and the first pawl 302 and the second pawl 303 are each located between the first projection 501 and the second projection 502. The second sliding member 503 is located outside the cabinet and connected to the first sliding member 500, that is, the second sliding member 503 is located outside the panel for the operator to operate. When the second sliding member 503 moves, a pushing force can be applied to the first pawl 302 by driving the first sliding member 500 to move, so that the first pawl 302 rotates in a first direction, or when the second sliding member 503 moves, a pushing force can be applied to the second pawl 303 by driving the first sliding member 500 to move, so that the second pawl 303 rotates in a second direction. For example, when the first sliding member 500 moves upward, a pushing force is applied to the second pawl 303 to push the second pawl 303 to rotate clockwise, so that the second flange 3031 moves away from the ratchet wheel 301. Although the first flange 3021 still extends between two teeth of the ratchet wheel 301, it does not hinder the rotation of the ratchet wheel 301 in the clockwise direction, since the first pawl 302 can rotate counterclockwise. Similarly, when the first slider 500 moves downward, a pushing force is applied to the first pawl 302 to push the first pawl 302 to rotate counterclockwise, so that the first flange 3021 moves away from the ratchet 301. Although the second flange 3031 still extends between the two teeth of the ratchet wheel 301, it does not impede the rotation of the ratchet wheel 301 in the counter-clockwise direction since the second pawl 303 can rotate clockwise.

The second sliding part 503 drives the first sliding part 500 to push the first pawl 302 or the second pawl 303, so that the operation of an operator can be facilitated.

A second fastener 504 is also fastened to the outside of the cabinet, i.e., the outside of the panel. The second fixed member 504 has a through hole, and correspondingly, the second sliding member 503 may also have a through hole. When the second sliding member 503 drives the first sliding member 500 to move to a predetermined position, a bolt can be inserted into the through holes of the second sliding member 503 and the second fixing member 504, so as to fix the position of the second sliding member 503.

Optionally, as shown in fig. 7, the transmission system of the present embodiment further includes a shutter 506. The shutter 506 is connected to the second sliding member 503 and covers an operation hole of the cabinet, through which the operation handle 100 operates the first linkage assembly 101. The second sliding member 503 slides to move the shutter 506 between a covering position for covering an operation hole and an avoiding position for avoiding the operation hole, and when the first sliding member 500 moves from an initial position toward one of the first pawl 302 or the second pawl 303, the shutter 506 moves from the covering position toward the avoiding position. Fig. 7 shows a state where the first slider 500 is at an initial position, when the shutter 506 is at the covering position. When the second sliding member 503 slides up and down, it will drive the first sliding member 500 to move from the initial position to the first pawl 302 or the second pawl 303, so that the shutter 506 will clear the operation hole to allow the operation handle 100 to be inserted therethrough. Thus, misoperation of an operator is further avoided.

The shutter 506 can be implemented in many ways, as shown in fig. 7, the shutter 506 can rotate around a rotating shaft 508, and the shutter 506 can be switched between the covering position and the avoiding position by pushing a third sliding pin 507 located at one end of the shutter 506 to slide in a third sliding groove located on the panel. The shutter 506 may be directly connected to the second slider 503, or may be connected to the shutter 506 by an interlocking member 505. The interlocking component 505 is connected with the second sliding component 503, and when the second sliding component 503 moves up and down, the interlocking component 505 is driven to move up and down, so that the third sliding pin 507 is driven to move in the third sliding groove.

According to the embodiment, the ratchet wheel 301, the first pawl 302 and the second pawl 303 are additionally arranged in the transmission system, so that the first linkage assembly 101 can only rotate towards one direction, the situation that an operator operates the first linkage assembly 101 in a midway reverse rotation mode is avoided, the grounding switch can be enabled to be located at a switch-on position or a switch-off position, and the safe operation of the switch cabinet and the personal safety of the operator are guaranteed.

EXAMPLE III

The present embodiment provides a switchgear comprising the transmission system of the earthing switch of any of the preceding embodiments.

As shown in fig. 1 and 2, the switchgear may further include an operating handle 100. The operating handle 100 has a first mating part, which can be mated with a second mating part on a cabinet body of a switch cabinet, and the operating handle 100 can be removed from or inserted into the cabinet body when the first mating part and the second mating part are located at corresponding positions. The corresponding positions of the first matching part and the second matching part correspond to a switch-on position or a switch-off position. Therefore, the operating handle 100 can be moved out only after the operator operates the grounding switch in place, and the personal safety of the operator is ensured.

As an exemplary illustration, the first mating feature may be a tab 1001 and the second mating feature may be a notch. The projection 1001 may be an original part of the operating handle 100 for fixing to the handle operating shaft 1011, so that the first fitting part can be realized without adding a structure to the operating handle 100. Of course, the first mating part may also be a recess and, correspondingly, the second mating part may be a projection.

Optionally, the switch cabinet of the present embodiment may further include a viewing hole located on a front plate of the cabinet body, and corresponding to a contact position of one ratchet wheel 301 with one of one first pawl 302 and one second pawl 303. The contact condition of the first pawl 302 and the ratchet wheel 301 or the contact condition of the second pawl 303 and the ratchet wheel 301 can be observed from the observation hole, so that the installation and debugging of an installer are facilitated. The number of the observation holes may be two, that is, one observation hole is provided at each of the contact position of the ratchet wheel 301 and the first pawl 302 and the contact position of the ratchet wheel 301 and the second pawl 303.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A transmission system for an earthing switch in a switchgear cabinet, said switchgear cabinet having a cabinet body, said earthing switch being located in said cabinet body, said transmission system comprising:

a first linkage assembly (101) comprising a handle operating shaft (1011) and a first rotating member (1012), wherein one end of the handle operating shaft (1011) is used for fixing the operating handle (100), and the other end of the handle operating shaft (1011) is fixed at one end of the first rotating member (1012);

a connecting member (102) having one end hinged to the other end of the first rotating member (1012), the other end of the connecting member (102) having a first sliding pin (1021);

a second linkage assembly (103) including a ground operating shaft (1031) and a second rotating member (1032), said second rotating member (1032) being fixed to said ground operating shaft (1031) and having a first sliding groove (1034), said first sliding pin (1021) being located in said first sliding groove (1034);

an energy storage assembly cooperating with said second linkage assembly (103);

when the first rotating member (1012) rotates through the operating handle (100), the grounding switch can be operated between a switching-on position where a movable contact (200) is in contact with a fixed contact and a switching-off position where the movable contact (200) is separated from the fixed contact, and when the first rotating member (1012) rotates, the first linkage assembly (101) drives the second linkage assembly (103) to rotate through the connecting piece (102), and in the process, the energy storage assembly stores energy firstly and then releases the energy to push the second rotating member (1032) to rotate.

2. The transmission system of claim 1, further comprising:

a ratchet (301) fixed to the handle operation shaft (1011) and rotatable with the handle operation shaft (1011);

a first pawl (302) fixed to the cabinet and blocking rotation of the ratchet (301) in a first direction;

a second pawl (303) secured to the cabinet and blocking rotation of the ratchet (301) in a second direction, the first direction being opposite the second direction.

3. The transmission system according to claim 2,

the first pawl (302) has a first flange (3021), the first flange (3021) being extendable between two teeth of the ratchet wheel (301), the first flange (3021) being movable away from the ratchet wheel (301) during rotation of the first pawl (302) in the first direction to allow rotation of the ratchet wheel (301) in the first direction;

said second pawl (303) having a second flange (3031), said second flange (3031) being extendable between two teeth of said ratchet wheel (301), said second flange (3031) being movable away from said ratchet wheel (301) during rotation of said second pawl (303) in said second direction to allow rotation of said ratchet wheel (301) in said second direction.

4. The transmission system of claim 3, further comprising:

a first slider (500) located inside the cabinet and having a first projection (501) and a second projection (502), the first pawl (302) and the second pawl (303) each being located between the first projection (501) and the second projection (502);

a second slide (503) located outside the cabinet and connected to the first slide (500);

when the second sliding part (503) moves, pushing force can be applied to the first pawl (302) by driving the first sliding part (500) to move, so that the first pawl (302) rotates along the first direction, or when the second sliding part (503) moves, pushing force can be applied to the second pawl (303) by driving the first sliding part (500) to move, so that the second pawl (303) rotates along the second direction.

5. The transmission system of claim 4, further comprising:

a shutter (506) connected to the second sliding member (503) and capable of covering an operation hole on the cabinet, wherein the operation handle (100) operates the first linkage assembly (101) through the operation hole;

the second sliding part (503) can drive the shutter (506) to move between a covering position for covering an operation hole and an avoiding position for avoiding the operation hole when sliding, and when the first sliding part (500) moves from an initial position to one of the first pawl (302) or the second pawl (303), the shutter (506) moves from the covering position to the avoiding position.

6. The transmission system according to any one of claims 1 to 5, wherein the energy storage assembly comprises:

two oppositely arranged third rotating members (1041,1042) fixed on the grounding operation shaft (1031);

a first pin (1043) fixed between the two third rotating members (1041,1042);

a first connecting portion (1044) fixed between the two third rotating members (1041,1042) and having a first through hole;

a guide (1045), one end of which is sleeved on the first pin (1043) and passes through the first through hole;

a spring (1047) sleeved on the guide member (1045) and capable of being compressed or released along with the rotation of the grounding operation shaft (1031).

7. The transmission system of claim 6, further comprising:

two first fixtures (1051,1052) fixed within the cabinet body;

and the second connecting part (1053) is fixed between the two first fixing parts (1051,1052) and is provided with a second through hole, the extending direction of the second through hole is the same as that of the first through hole, the other end part of the guide (1045) penetrates through the second through hole, and the spring (1047) is positioned between the first connecting part (1044) and the second connecting part (1053).

8. The transmission system according to claim 6, wherein the moving distance of the grounding switch from the closing position to a dead point position is greater than the moving distance of the movable contact (200) from the dead point position to the opening position, and when the grounding switch is located at the dead point position, a straight line formed by two end points of the guide member (1045) passes through the axis of the grounding operation shaft (1031).

9. A transmission system according to any one of claims 1 to 5, characterised in that the second linkage assembly (103) further comprises a further second rotary member (1032), and the further second rotary member (1032) has a further first runner through which the first sliding pin (1021) is also disposed, the connecting member (102) being located between the second rotary member (1032) and the further second rotary member (1032).

10. A transmission system according to any one of claims 1-5, characterized in that the section of the ground engaging operating shaft (1031) is square.

11. A switchgear cabinet having a cabinet body, characterized in that it comprises a transmission system for earthing switches in a switchgear cabinet according to any one of claims 1-10.

12. The switchgear cabinet of claim 11, further comprising:

the operating handle (100) is provided with a first matching part, the first matching part can be matched with a second matching part on a cabinet body of a switch cabinet, when the first matching part and the second matching part are located at corresponding positions, the operating handle (100) can be moved out of or inserted into the cabinet body, and the corresponding positions correspond to a switching-on position or a switching-off position.

13. A switchgear cabinet according to claim 12, characterized in that the first mating part is a projection (1001) and the second mating part is a recess, or the first mating part is a recess and the second mating part is a projection.

14. The switchgear as claimed in any of claims 11-13, further comprising:

a viewing aperture located in a front panel of the cabinet and corresponding to a contact position of a ratchet wheel (301) with one of a first pawl (302) and a second pawl (303), the ratchet wheel (301) being fixed to the first rotating member (1012) and rotatable with the first rotating member (1012), the first pawl (302) and the second pawl (303) being fixed to a cabinet, the first pawl (302) being capable of blocking rotation of the ratchet wheel (301) in a first direction, the second pawl (303) being capable of blocking rotation of the ratchet wheel (301) in a second direction, the first direction being opposite to the second direction.