CN220306145U - Time-delay operating handle for grounding switch - Google Patents

Abstract

The utility model provides a time-delay operating handle for a grounding switch, which comprises a control rotary rod. The time-delay operating handle comprises a long operating rod, a short operating rod and a switching mechanism. The short operating rod is used for driving and controlling the rotating rod to rotate. A long lever is attached to the adapter mechanism to drive the adapter mechanism to rotate. The switching mechanism comprises a shell, a ratchet wheel and a reversing assembly which are accommodated in the shell in a relatively rotatable mode, a driving head and a reversing shifting block, the reversing assembly can be selectively engaged with the ratchet wheel under the driving of the reversing shifting block, the reversing assembly only allows the ratchet wheel to rotate in a clockwise direction when the reversing shifting block rotates to a first position, and the reversing assembly only allows the ratchet wheel to rotate in a counterclockwise direction when the reversing shifting block rotates to a second position. The time-delay operating handle with the above configuration can prolong the reverse operation time interval, so that the grounding switch can be opened after a certain time after the grounding switch is closed to a fault.

Description

Time-delay operating handle for grounding switch

Technical Field

The present utility model relates to a grounding switch, and more particularly to a time delay operating handle for a grounding switch.

Background

The grounding switch is widely used in the power grid, and the reliability and the stability of the grounding switch play a vital role in the operation and maintenance safety of the power grid. The grounding switch comprises a control rotary rod, and the switching-on and switching-off of the grounding switch are realized by driving the control rotary rod to execute rotary motion. When the control rotary rod rotates to a designated position towards a first direction, the grounding switch is switched on, and when the control rotary rod rotates to the designated position towards a second direction opposite to the first direction, the grounding switch is switched off.

However, when the ground switch is closed, there is a possibility that a fault or a fault occurs in the live circuit, resulting in a ground fault. After the control lever is screwed in the first direction to close by using the operating handle in the prior art, an operator is very likely to reversely screw the operating handle immediately to intend to realize opening under the condition of panic when the fault occurs. Because the circuit breaker itself possesses the automatic function of breaking the circuit of ground fault in the cubical switchboard, operating personnel reverse the twisting in zero time interval can aggravate the degree that ground switch trouble damaged on the contrary, this extremely probably causes the cabinet internal arc to lead to equipment to be impaired, endangers operating personnel's personal safety even, further enlarges the fault range, influences the power supply continuity.

Disclosure of Invention

In order to solve the above-mentioned problems, the present utility model provides a time-delay operating handle for a grounding switch, which can function to lengthen a reverse operation time interval.

The utility model provides a time-delay operating handle for a grounding switch, the grounding switch is accommodated in a switch cabinet, the switch cabinet comprises a cabinet body with a first opening, the grounding switch comprises a control rotary rod which can be accessed from the outside of the cabinet body through the first opening, the control rotary rod is designed to rotate in a clockwise direction and a counterclockwise direction under the driving of an external force so as to correspondingly realize the switching-on and switching-off of the grounding switch, and the time-delay operating handle is configured to comprise: a long lever and a short lever having oppositely disposed first and second ends, the second end being designed to be capable of being conformably sleeved around the control lever through the first opening to drive the control lever to rotate; the steering assembly further includes a switch mechanism attached to one end of the switch mechanism to drive the switch mechanism to rotate, the switch mechanism being configured to include a housing having oppositely disposed first and second sides and a ratchet wheel and a steering assembly rotatably received within the housing, and further including a drive head having opposite third and fourth ends, wherein the third end extends into the housing to fixedly connect with the ratchet wheel, the fourth end extends from the first side of the housing and is detachably engageable with the first end of the short lever to drive the short lever to rotate in synchronization with the drive head, the switch mechanism further including a steering block disposed outside the second side and switchable between first and second positions, the steering assembly being configured to be selectively engageable with the ratchet wheel upon actuation of the steering block, the steering assembly allowing rotation of the ratchet wheel only in a clockwise direction when the steering block is rotated to the first position and allowing rotation of the ratchet wheel only in a counterclockwise direction when the steering block is rotated to the second position.

If the delay operating handle with the above configuration is intended to drive the control lever in the reverse direction when the ground switch is on fault or the live circuit is erroneously on fault, the operator must first switch the reversing dial from the first position to the second position or from the second position to the first position, and then allow the reverse screwing operation to be performed. It has been found in practice that the sum of the time for the operator to manually switch the reversing lever from the first position to the second position and the time for the operator to move his hand again from the reversing lever to hold the long operating lever in preparation for application of the external force is at least 3 seconds, and the time from switching the position of the reversing lever to driving the control knob to rotate in the reverse direction until the completion of the breaking is at least 5 seconds.

It can be seen that the time delay operating handle according to the present disclosure further fulfills the function of extending the reverse operating time, so that the earthing switch must be opened after a certain duration (typically 3 seconds) after the earthing switch has been closed to a fault. This greatly reduces the risk of operator injury and equipment damage due to arcing when the grounding switch engages the faulty powered circuit.

In addition, since the direction in which the drive control knob is rotated can be changed only by switching the position of the reversing dial, the screwing of the operating handle does not require a large rotation angle, and thus the operation of the operating handle does not require a large rotation space.

Preferably, the reversing assembly is configured to include a guide block connected to the reversing shifting block, and further includes a first limiting assembly and a second limiting assembly disposed on opposite sides of the guide block, the first limiting assembly including a first return spring fixed in the housing and a first guide bar connected to the first return spring, and the second limiting assembly including a second return spring fixed in the housing and a second guide bar connected to the second return spring.

Preferably, the guide block is designed to rotate to allow only the first guide bar to engage with the ratchet when the reversing dial is rotated to a first position and to rotate to allow only the second guide bar to engage with the ratchet when the reversing dial is rotated to a second position.

Preferably, the short lever and the long lever are designed to extend perpendicularly to each other after being attached to the transit mechanism, respectively.

Preferably, a connection recess is provided at the second end of the short operating lever, the connection recess having a non-circular inner cross section.

Preferably, the control lever has a hexagonal cross section, the inner cross section of the connecting recess also being configured as a hexagon in conformity with the control lever.

Preferably, the connection recess can be sleeved on the control swivel in a clearance fit manner.

Drawings

Embodiments of the device of the present application are described in further detail with reference to the accompanying drawings, wherein:

fig. 1 shows a perspective view of a switchgear cabinet;

FIG. 2 shows an enlarged schematic view of the control lever of the grounding switch;

FIG. 3 shows a schematic view of the direction of insertion of the operating handle into the first opening;

fig. 4 shows a perspective view of the operating handle;

FIG. 5 shows a schematic view of the switching mechanism from a first side;

FIG. 6 shows a schematic view of the switch mechanism from a second side, with the reversing lever in a first position;

FIG. 7 shows a schematic view of the reversing dial in a second position;

FIG. 8 shows a schematic structural view of the interior of the housing of the switching mechanism;

fig. 9 shows a perspective view of the short lever;

FIG. 10 shows a schematic structural view of a first end of a short lever;

fig. 11 shows a schematic structural view of the second end of the short lever.

List of reference numerals

1. A cabinet body; 11. a first opening; 12. controlling a rotating rod; 2. a long operating lever; 3. a short lever; 31. a first end; 32. a second end; 321. a connection recess; 4. a switching mechanism; 5. a housing; 51. a first side; 52. a second side; 6. a drive head; 61. a third end; 62. a fourth end; 7. a ratchet wheel; 8. a reversing shifting block; 9. a reversing assembly; 91. a guide block; 92. a first return spring; 93. a first guide bar; 94. a second return spring; 95. and a second guide bar.

Detailed Description

Referring now to the drawings, illustrative versions of the disclosed architecture are described in detail. Although the drawings are provided to present some embodiments of the utility model, the drawings are not necessarily to scale and certain features may be exaggerated, removed, or partially sectioned to better illustrate and explain the present disclosure.

Certain directional terms used hereinafter to describe the drawings should be understood to have their normal meaning and refer to those directions which are involved in normal viewing of the drawings. Where "left" and "right" refer to the left hand side and the right hand side when viewed at the angle of fig. 8.

Fig. 1 shows a general schematic of a switchgear cabinet. The switchgear has a cabinet body 1, and a grounding switch (parts other than a control lever are not shown) is installed inside the cabinet body 1. The cabinet 1 is provided with a first opening 11, and the first opening 11 can extend into the cabinet 1 from the outside of the cabinet 1. The earthing switch comprises a control rotary rod 12 accommodated in the cabinet body 1. Fig. 2 shows a schematic view of the first opening 11 and a control lever 12 correspondingly arranged at the first opening 11. The control lever 12 is accessible to an operator from the outside of the cabinet 1 via the first opening 11 to drive the control lever 12 to rotate.

The control rotary rod 12 can rotate towards the clockwise and anticlockwise directions under the drive of external force, wherein when the control rotary rod 12 rotates to the set position along the clockwise direction, the grounding switch completes the switching-on operation, and when the control rotary rod 12 rotates to the set position along the anticlockwise direction, the grounding switch completes the switching-off operation. The above-mentioned "clockwise" and "counterclockwise" refer to the orientations observed at the viewing angles in fig. 2. It will be appreciated by those skilled in the art that the control lever 12 may also be set to complete the switching operation when rotated in the clockwise direction and complete the switching operation when rotated in the counterclockwise direction, as desired. The control knob 12 typically has a hexagonal cross-section, but those skilled in the art will appreciate that the control knob 12 may also have a non-circular cross-section, such as triangular, quadrilateral, etc

The time delay operating handle according to the present utility model is designed to be engaged with the control knob 12 through the first opening 11 to drive the control knob 12 to rotate in a clockwise direction or a counterclockwise direction as needed. In fig. 3, the operating handle will be inserted into the first opening 11 in the direction of the arrow to engage with the control knob 12.

Referring to fig. 4-11 in combination, a particular configuration of the time delay operating handle is shown. As shown in fig. 4, the operating handle includes a long operating lever 2, a short operating lever 3, and an adapter mechanism 4 that couples the long operating lever 2 and the short operating lever 3 to each other. One end of the long operating rod 2 is connected with the switching mechanism 4, the other end is held by a hand to apply external force to the whole operating handle, and under the action of the external force, the long operating rod 2 drives the switching mechanism 4 to execute rotary motion. The short operating lever 3 has a first end 31 and a second end 32, the first end 31 being detachably connected to the switching mechanism 4, the second end 32 being able to extend into the cabinet 1 to engage the control lever 12. Preferably, when both the short operating lever 3 and the long operating lever 2 are connected to the switching mechanism 4, the short operating lever 3 and the long operating lever 2 are arranged perpendicular to each other.

Referring particularly to fig. 5-8, the adapter mechanism 4 includes a housing 5, the housing 5 having oppositely disposed first and second sides 51, 52. In use, the first side 51 will face the control knob 12 and the second side 52 will face the operator. Inside the housing are housed a ratchet 7 and a reversing assembly 9.

The adapter mechanism 4 further comprises a drive head 6, the drive head 6 having opposite ends, namely a third end 61 and a fourth end 62. One part of the drive head 6 protrudes into the interior of the housing 5 and the other part protrudes from the first side 51 of the housing 5. Specifically, a through hole is provided in the first side surface 51, through which the drive head 6 can protrude from the housing 5. The drive head 6 is designed to extend into the housing 5 with its third end 61 and to extend out of the housing 5 with its fourth end 62. The third end 61 is fixedly connected to the ratchet wheel 7 after it has been inserted into the housing 5, so that it can move synchronously with the ratchet wheel 7, i.e. the movement of the ratchet wheel 7 is simultaneously transmitted to the drive head 6.

The fourth end 62 of the drive head 6 is detachably engageable with the short operating lever 3, in particular with the first end 31 of the short operating lever 3, to drive the short operating lever 3 in rotation in synchronism with the drive head 6. In a preferred form, the fourth end 62 may be designed to have a square cross-section. Accordingly, referring to fig. 10, a recess may be provided at the first end 31 of the short lever 3, which recess also has a square inner cross section for the fourth end 62 to be conformably inserted therein. When the fourth end 62 is inserted into the short operating lever 3, the rotational movement of the driving head 6 can be transmitted to the short operating lever 3 so that the short operating lever 3 rotates synchronously with the driving head 6.

With further reference to fig. 6 and 7, the adapter mechanism 4 also includes a reversing dial 8. The reversing dial 8 is disposed on a second side 52 of the housing 5. Fig. 6 shows a schematic view of the reversing dial 8 in a first position, and fig. 7 shows a schematic view of the reversing dial 8 in a second position. In the view of fig. 6 and 7, the reversing dial 8 can be switched from the first position to the second position by rotating clockwise and from the second position to the first position by rotating counterclockwise. The reversing dial 8 is operatively connected to a reversing assembly 9 housed inside the housing 5, the reversing assembly 9 being to be selectively engaged with the ratchet 7 by the actuation of the reversing dial 8 to determine the direction of rotation of the ratchet 7.

Specifically, the reversing assembly 9 only allows the ratchet 7 to rotate in a clockwise direction when the reversing dial 8 is rotated to the first position, and the reversing assembly 9 only allows the ratchet 7 to rotate in a counterclockwise direction when the reversing dial 8 is rotated to the second position. It should be noted here that fig. 6 and 7 are only exemplary, and can be adjusted as desired to the first position of fig. 7 and the second position of fig. 6.

The manner in which the reversing assembly 9 operates is detailed below. Referring to fig. 8, the ratchet 7 and the reversing assembly 9 are relatively rotatably housed within the housing 5. The reversing assembly 9 is configured to include a guide block 91, a first spacing assembly, and a second spacing assembly. The guide block 91 is connected to the reversing dial 8 to rotate with the reversing dial 8 when it rotates. The first and second stopper assemblies are disposed at both sides of the guide block 91, and are alternately contacted in a rotation path of the guide block 91 to respectively push the first and second stopper assemblies to rotate with respect to the housing. In fig. 8 is shown by way of example with the first stop assembly on the left side of the guide block 91 and the second stop assembly on the right side of the guide block 91. Thus, an operator can indirectly control either of the first and second stop assemblies to engage the ratchet 7 by controlling the reversing dial 8.

The first limiting assembly includes a first return spring 92 and a first guide rod 93, wherein one end of the first return spring 92 is fixedly connected to the inner wall of the housing 5, and the other end of the first return spring 92 is connected to the first guide rod 93 to apply elastic pushing force to the first guide rod 93. The second limiting assembly includes a second return spring 94 and a second guide rod 95, wherein one end of the second return spring 94 is fixedly connected to the inner wall of the housing 5, and the other end of the second return spring 94 is connected to the second guide rod 95 to apply elastic pushing force to the second guide rod 95. When the reversing dial 8 is rotated to the first position, the guide block 91 is rotated to a position to push the second guide lever 95, thereby pushing the second guide lever 95 away from the ratchet 7, and the first guide lever 93 is engaged with the ratchet 7 under the urging force of the first return spring 92 as it is not pushed by the guide block 91. Similarly, in the case shown in fig. 8, when the reversing dial 8 is rotated to the second position, the guide block 91 is rotated to a position that urges the first guide lever 93 away from the ratchet 7, at which time the second guide lever 95 is engaged with the ratchet 7 by the urging force of the second return spring 94. When the first guide bar 93 is engaged with the ratchet 7, only the ratchet 7 is allowed to rotate in the clockwise direction. When the second guide bar 95 is engaged with the ratchet 7, only the ratchet 7 is allowed to rotate in the counterclockwise direction.

Thereby, by switching the position of the reversing dial 8, the rotational direction of the ratchet 7 can be controlled and the rotational direction of the short operating lever 3 connected to the drive head 6 can be further determined.

Referring to fig. 11, a coupling recess 321 is also provided at the second end 32 of the short operating lever 3, which conforms to the cross-sectional shape of the control knob 12. The connection recess 321 of the second end 32 may have a non-circular inner cross section. Specifically, in the case where the control knob 12 has a hexagonal cross section, the inner cross section of the connection recess 321 is also designed to be hexagonal. It is further preferred that the connection recess 321 is dimensioned to be able to socket over the control lever 12 in a clearance fit.

Claims (7)

1. A time delay operating handle for a grounding switch, the grounding switch being housed within a switch cabinet, the switch cabinet comprising a cabinet body (1) having a first opening (11), the grounding switch comprising a control lever (12) accessible from outside the cabinet body (1) via the first opening (11), the control lever (12) being designed to be rotatable under external force drive in a clockwise and counter-clockwise direction to correspond to the closing and opening of the grounding switch, characterized in that the time delay operating handle is configured to comprise a long operating lever (2) and a short operating lever (3), the short operating lever (3) having oppositely arranged first and second ends (31, 32) being designed to be conformably socket-coupled around the outer circumference of the control lever (12) through the first opening (11) to drive the control lever (12) in rotation, the operating handle further comprising a changeover mechanism (4), the long operating lever (2) having a changeover mechanism (4) arranged to drive the changeover mechanism (4) to the opposite side (5) and the changeover mechanism (5) having opposite sides (5) arranged to the changeover mechanism (4) and (5), further comprising a drive head (6) having opposite third (61) and fourth (62) ends, wherein the third (61) end extends into the housing (5) for fixed connection with the ratchet wheel (7), the fourth (62) end extends from the first side (51) of the housing (5) and is detachably engageable with the first (31) end of the short lever (3) for driving the short lever (3) in synchronous rotation with the drive head (6), the switching mechanism (4) further comprises a reversing dial (8) arranged outside the second side (52) and switchable between a first and a second position, the reversing assembly (9) being designed to be selectively engageable with the ratchet wheel (7) under the drive of the reversing dial (8), the reversing assembly (9) allowing rotation of the ratchet wheel (7) only in a clockwise direction when the reversing dial (8) is rotated to the first position, and the reversing assembly (9) allowing rotation of the ratchet wheel (7) only in a counter clockwise direction when the reversing dial (8) is rotated to the second position.

2. The time delay operating handle of claim 1, wherein the reversing assembly is configured to include a guide block coupled to the reversing dial block, and further comprising a first stop assembly and a second stop assembly disposed on opposite sides of the guide block, the first stop assembly comprising a first return spring secured within the housing and a first guide bar coupled to the first return spring, and the second stop assembly comprising a second return spring secured within the housing and a second guide bar coupled to the second return spring.

3. The time delay operating handle of claim 2, wherein the guide block is designed to rotate to allow only the first guide bar to engage the ratchet when the reversing dial is rotated to a first position and to rotate to allow only the second guide bar to engage the ratchet when the reversing dial is rotated to a second position.

4. A time delay operating handle as claimed in claim 3, characterized in that the short and long operating levers are designed to extend perpendicularly to each other after being attached to the adapter mechanism respectively.

5. A time delay operating handle according to any one of the preceding claims, characterized in that a connection recess is provided at the second end of the short operating lever, the connection recess having a non-circular inner cross section.

6. The time-lapse operating handle of claim 5, wherein the control lever has a hexagonal cross section, and the inner cross section of the connection recess also conforms to the control lever being constructed in a hexagonal shape.

7. The time-lapse operating handle of claim 6, wherein the connection recess is capable of being socket-coupled to the control lever in a clearance fit.