CN215870494U

CN215870494U - Rear door interlock and cubical switchboard

Info

Publication number: CN215870494U
Application number: CN202122087886.6U
Authority: CN
Inventors: 韩福亮; 孙文艺; 李勇; 徐世海; 王永祥
Original assignee: Guangdong Mingyang Electric Co ltd
Current assignee: Guangdong Mingyang Electric Co ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-02-18
Anticipated expiration: 2031-08-31

Abstract

The utility model discloses a back door interlocking device, which comprises: the device comprises a transmission shaft, an eccentric structure, an extension rod and a locking structure; the eccentric structure is arranged on the transmission shaft and comprises an eccentric part which is connected with the transmission shaft and rotates around the transmission shaft; one end of the extension rod is hinged with the eccentric part, and the length direction of the extension rod is staggered with the length direction of the transmission shaft; the clamping and locking structure comprises a fixing seat and a clamping and locking piece, wherein the clamping and locking piece is hinged on the fixing seat, one end of the eccentric part, which is far away from the extension rod, is connected with the clamping and locking piece and can drive the clamping and locking piece to swing, and the clamping and locking piece can swing to be close to the rear door locking block and is clamped with the rear door locking block. By adding the extension rods which are mutually staggered with the transmission shaft, the distance between the clamping and locking piece for locking the rear door and the transmission shaft can be effectively increased, so that the requirement that the insulation distance is at least not less than 125mm can be met.

Description

Rear door interlock and cubical switchboard

Technical Field

The utility model relates to the field of switch cabinets, in particular to a rear door interlocking device and a switch cabinet.

Background

The interlocking common implementation mode of the rear door of the switch cabinet in the existing market is as follows: the transmission shaft of the grounding switch directly extends to the cabinet and then is interlocked with the rear door, and when the grounding switch is opened, the rear door lock block on the rear door is locked through the transmission shaft, so that the rear door cannot be opened. Because the transmission shaft usually needs to rotate coaxially with the grounding switch, the insulation distance between the transmission shaft and the copper bar cannot be too far away, which also causes the distance between the rear door and the copper bar to be usually only about 90mm, and does not meet the requirement that the electrical insulation distance of a 10KV system specified by the power industry standard is at least not less than 125 mm. Therefore, the product on the market meets the electrical insulation of the switch cabinet in a composite insulation mode by adding the insulation sleeve on the transmission shaft of the grounding switch. However, such insulation is often prone to problems such as insulation sheath aging and breakdown.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a rear door interlocking device which can better realize an insulation effect.

The utility model also provides a switch cabinet with the rear door interlocking device.

A rear door interlock device according to an embodiment of a first aspect of the present invention includes: the device comprises a transmission shaft, an eccentric structure, an extension rod and a locking structure; the eccentric structure is arranged on the transmission shaft and comprises an eccentric part which is connected with the transmission shaft and rotates around the transmission shaft; one end of the extension rod is hinged with the eccentric part, and the length direction of the extension rod is staggered with the length direction of the transmission shaft; the clamping and locking structure comprises a fixing seat and a clamping and locking piece, wherein the clamping and locking piece is hinged on the fixing seat, one end of the eccentric part, which is far away from the extension rod, is connected with the clamping and locking piece and can drive the clamping and locking piece to swing, and the clamping and locking piece can swing to be close to the rear door locking piece and can be locked with the rear door locking piece.

The rear door interlocking device provided by the embodiment of the utility model has at least the following beneficial effects: because the length direction of the extension rod and the length direction of the transmission shaft are mutually staggered, the end part of the extension rod can be greatly far away from the transmission shaft. When the transmission shaft rotates, the extension rod is driven to move together through the eccentric structure, so that the locking piece is driven to move, and the locking or unlocking effect on the rear door is achieved.

The distance between the clamping and locking piece for locking the back door and the transmission shaft can be effectively increased by adding the extension rods which are mutually staggered with the transmission shaft, so that the requirement that the electrical insulation distance of a 10KV system specified by the electric power industry standard between the back door and the copper bar is at least not less than 125mm can be met, the problems of aging and breakdown of the existing composite insulation part can be further avoided, and the safety of operators entering the switch cabinet from the back door is guaranteed.

According to some embodiments of the present invention, the device further comprises a driving shaft, a locking structure and a driving member, wherein two ends of the driving shaft are respectively connected to the transmission shaft and the driving member; the locking structure is arranged between the driving shaft and the driving piece and can separate the driving piece from the transmission shaft.

According to some embodiments of the utility model, the end of the drive shaft is provided with a control slot, the drive member comprises a drive handle insertable into the control slot; the locking structure comprises an operating plate, and the operating plate is arranged at the end part of the driving shaft in a sliding mode and can cover the notch of the control slot.

According to some embodiments of the utility model, the operation plate is elastically connected to an end of the driving shaft and can elastically slide with respect to the end of the driving shaft.

According to some embodiments of the utility model, the operation plate is provided with a passage groove, and the operation plate can drive the passage groove to be communicated with or dislocated from the control slot when sliding.

According to some embodiments of the utility model, the eccentric structure comprises a crank arm, the crank arm is sleeved on the transmission shaft, and the eccentric portion is arranged at one end of the crank arm far away from the transmission shaft.

According to some embodiments of the utility model, a length direction of the crank arm and a length direction of the transmission shaft are orthogonal to each other.

According to some embodiments of the utility model, an end of the extension rod is provided with an avoiding position, and the crank arm is connected to the avoiding position so that the crank arm and the extension rod approach to be flush.

According to some embodiments of the utility model, the transmission shaft is provided with a positioning step for relative positioning with the mounting rack of the copper bar.

A switchgear panel in accordance with an embodiment of the second aspect of the present invention includes a rear door interlock in accordance with the above-described embodiment of the first aspect of the present invention.

The switch cabinet provided by the embodiment of the utility model at least has the following beneficial effects: the distance between the clamping and locking piece for locking the back door and the transmission shaft can be effectively increased by adding the extension rods which are mutually staggered with the transmission shaft, so that the requirement that the electrical insulation distance of a 10KV system specified by the electric power industry standard between the back door and the copper bar is at least not less than 125mm can be met, the problems of aging and breakdown of the existing composite insulation part can be further avoided, and the safety of operators entering the switch cabinet from the back door is guaranteed.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of a rear door interlock device in accordance with an embodiment of the present invention;

FIG. 2 is a schematic view of a drive shaft of the rear door interlock device shown in FIG. 1;

FIG. 3 is a schematic view of an extension pole of the rear door interlock device shown in FIG. 1;

fig. 4 is a schematic view of a latching structure of the rear door interlock device shown in fig. 1.

Reference numerals: 120 is the transmission shaft, 130 is the turning arm, 135 is eccentric portion, 140 is the extension rod, 145 is dodging the position, 150 is the latch fitting, 155 is the pothook, 200 is the back door locking piece, 250 is the draw-in groove, 300 is the fixing base, 410 is the operation panel, 415 is the groove of crossing, 420 is the drive shaft, 425 is the control slot, 430 is the driving piece, 500 is the mounting bracket.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 4, a rear door interlock includes: a transmission shaft 120, an eccentric structure, an extension rod 140 and a locking structure; the eccentric structure is arranged on the transmission shaft 120, and comprises an eccentric part 135 which is connected with the transmission shaft 120 and rotates around the transmission shaft 120; one end of the extension rod 140 is hinged with the eccentric part 135, and the length direction of the extension rod 140 is staggered with the length direction of the transmission shaft 120; the locking structure comprises a fixed seat 300 and a locking piece 150, wherein the locking piece 150 is hinged on the fixed seat 300, one end, away from the eccentric part 135, of the extension rod 140 is connected with the locking piece 150 and can drive the locking piece to swing, and the locking piece 150 can swing to be close to the rear door lock block 200 and is locked with the rear door lock block 200. Since the length direction of the extension rod 140 and the length direction of the transmission shaft 120 are staggered with each other, the end of the extension rod 140 is far away from the transmission shaft 120. When the transmission shaft 120 rotates, the extension rod 140 is driven to move together by the eccentric structure, so as to drive the locking member 150 to move, thereby achieving the locking or unlocking effect of the rear door. By adding the extension rods 140 which are staggered with the transmission shaft 120, the distance between the locking piece 150 for locking the rear door and the transmission shaft 120 can be effectively increased, so that the requirement that the electrical insulation distance of a 10KV system specified by the power industry standard between the rear door and a copper bar is at least not less than 125mm can be met, the problems of aging and breakdown of the existing composite insulation part can be avoided, and the safety of operators entering the switch cabinet from the rear door can be guaranteed.

Specifically, the locking member 150 is provided with a hook 155, the rear door lock 200 is provided with a slot 250, and the hook 155 can rotate into the slot 250. Of course, the locking member 150 can be locked in the rear door lock block 200 by other structures, and the specific embodiment can be adjusted according to the actual requirement, which is not limited herein.

Specifically, the extension bar 140 is an elongated flat steel. Of course, the extension rod 140 may be formed by other components, such as an insulating rubber rod, etc., and the specific embodiment may be adjusted according to the actual needs, which is not limited herein.

In some embodiments, referring to fig. 1, the device further includes a driving shaft 420, a locking structure and a driving member 430, wherein two ends of the driving shaft 420 are respectively connected to the transmission shaft 120 and the driving member 430; the locking structure is disposed between the driving shaft 420 and the driving member 430 and can separate the driving member 430 from the driving shaft 120. The driving member 430 drives the transmission shaft 120 through the driving shaft 420, thereby locking or unlocking the rear door. The locking structure can enable the driving shaft 420 to rotate only after the locking effect of the locking structure is released, and the driving shaft 420 can be driven by the driving member 430, so that the driving member 430 is effectively prevented from automatically driving the driving shaft 420 to rotate under the factors of mistaken touch or self weight and the like.

In some embodiments, referring to fig. 1, the end of the drive shaft 420 is provided with a control slot 425, and the driving member 430 includes a driving handle that can be inserted into the control slot 425; the locking structure includes an operation plate 410, and the operation plate 410 is slidably disposed at an end of the driving shaft 420 to cover the notch of the control slot 425. After the operation plate 410 slides relative to the control slot 425, the control slot 425 is covered, so that the driving handle cannot be inserted into the control slot 425, and the driving member 430 is prevented from driving the transmission shaft 120 to rotate through the driving shaft 420. When the driving handle needs to be inserted into the control slot 425, the control slot 425 can be exposed by sliding the operation plate 410 again, so that the driving handle can be inserted into the control slot 425, and the control effect of the driving shaft 420 can be realized.

Specifically, the cross section of the control slot 425 is a regular polygon, and the driving handle is provided with a corresponding polygon prism, which can be inserted into the regular polygon control slot 425 and drive the regular polygon control slot to rotate.

It is contemplated that the locking structure may be formed from other components, such as an electromagnetic lock (not shown). The specific implementation manner can be adjusted according to actual needs, and is not limited herein.

In some embodiments, referring to fig. 1, the operation plate 410 is elastically coupled to an end of the driving shaft 420 and can elastically slide with respect to the end of the driving shaft 420. The elastic connection enables the operation panel 410 to automatically elastically reset and cover the control slot 425 after the driving member 430 slides out of the control slot 425, thereby effectively preventing the external environment from interfering with the control slot 425 and the driving shaft 420.

In some embodiments, referring to fig. 1, the operation plate 410 is provided with a passage slot 415, and the operation plate 410 can drive the passage slot 415 to communicate with or be misaligned with the control slot 425 when sliding. When the access slot 415 is coincident with the control slot 425, the drive handle can be inserted through the access slot 415 and into the control slot 425. The misalignment of the aisle slot 415 with the control slot 425 may allow for the closure of the control slot 425. Through disposing the channel passing groove 415, the alignment requirement between the operating panel 410 and the driving shaft 420 can be more accurate, so that the requirement of the process of driving the rear door to unlock the door to an operator is improved, and the problems of false start and the like caused by external force or misoperation of non-professional personnel when the switch cabinet is exposed are avoided.

In some embodiments, referring to fig. 2, the eccentric structure includes a crank arm 130, the crank arm 130 is sleeved on the transmission shaft 120, and the eccentric portion 135 is disposed at an end of the crank arm 130 away from the transmission shaft 120. The crank arm 130 can effectively transmit the rotation of the transmission shaft 120 to the eccentric rotation of the eccentric portion 135, so that the eccentric portion 135 can drive the extension rod 140 to swing, and further directly and effectively drive the locking member 150 to lock or unlock.

It is contemplated that the eccentric configuration may be formed by other components, such as a cam (not shown) disposed at an end of the drive shaft 120. The specific implementation manner can be adjusted according to actual needs, and is not limited herein.

In some embodiments, referring to fig. 2, the length direction of the crank arm 130 and the length direction of the transmission shaft 120 are orthogonal to each other. The orthogonal direction not only enables the crank arm 130 to enable the directions of the extension rods 140 and the rotating shaft to be mutually staggered, but also enables the insulation distance at two ends of the extension rods 140 to be equal to the length between the extension rods 140, so that the creepage distance between the back door and the copper bar can be directly judged through the length of the extension rods 140, and further, whether the requirement that the electrical insulation distance of a 10KV system is at least not less than 125mm is simply and directly judged.

It is contemplated that the crank arm 130 or the extension rod 140 may form a certain angle with the transmission shaft 120, such as 120 °, and the specific embodiment may be adjusted according to the actual requirement, and is not limited herein.

In some embodiments, referring to fig. 3, the end of the extension pole 140 is provided with a relief 145, and the lever arm 130 is connected at the relief 145 such that the lever arm 130 and the extension pole 140 approach flush. The evasion position 145 forms a bending structure on the extension rod 140, so that the crank arm 130 can rotate relative to the extension rod 140 in the bent evasion position 145, and the crank arm 130 and the extension rod 140 are approximately flush. The crank arm 130 and the extension rod 140 which are approximately parallel and level can prevent the crank arm 130 from protruding and colliding with the inner wall of the switch cabinet, so that the extension rod 140 and the crank arm 130 can be configured close to the inner side wall of the switch cabinet, the space occupied by the crank arm 130 and the extension rod 140 can be reduced, and the volume and the weight of the switch cabinet can be reduced,

In some embodiments, referring to fig. 2, the transmission shaft 120 is provided with a positioning step for positioning relative to the mounting frame 500 of the copper bar. The transmission shaft 120 can be pivoted with the mounting rack 500 of the copper bar through the positioning steps, so that the positioning between the transmission shaft 120 and the copper bar is realized, the relative positioning between the extension rod 140 and the rear door at the end part of the extension rod 140 and the copper bar is realized through the transmission shaft 120, and the adjustment of the insulation distance between the rear door and the copper bar can be realized by adjusting the length of the extension rod 140.

A second aspect of the utility model provides an embodiment of a switchgear comprising the above rear door interlock. The distance between the locking piece 150 for locking the back door and the transmission shaft 120 can be effectively increased by adding the extension rod 140 which is mutually staggered with the transmission shaft 120, so that the requirement that the electrical insulation distance of a 10KV system specified by the electric power industry standard between the back door and a copper bar is at least not less than 125mm can be met, the problems of aging and breakdown of the existing composite insulation part can be further avoided, and the safety of operators entering the switch cabinet from the back door is ensured.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A rear door interlock, comprising:

a drive shaft (120);

the eccentric structure is arranged on the transmission shaft (120) and comprises an eccentric part (135) which is connected with the transmission shaft (120) and rotates around the transmission shaft (120);

an extension rod (140) hinged to the eccentric portion (135), wherein the length direction of the extension rod (140) and the length direction of the transmission shaft (120) are staggered with each other;

the clamping and locking structure comprises a fixed seat (300) and a clamping and locking piece (150), wherein the clamping and locking piece (150) is hinged on the fixed seat (300), one end, away from the eccentric part (135), of the extension rod (140) is connected with the clamping and locking piece (150) and can drive the clamping and locking piece to swing, and the clamping and locking piece (150) can swing to be close to the rear door lock block (200) and is mutually locked with the rear door lock block (200).

2. A rear door interlock as claimed in claim 1, wherein:

the locking mechanism further comprises a driving shaft (420), a locking structure and a driving piece (430), wherein two ends of the driving shaft (420) are respectively connected with the transmission shaft (120) and the driving piece (430); the locking structure is arranged between the driving shaft (420) and the driving piece (430) and can separate the driving piece (430) and the transmission shaft (120).

3. A rear door interlock as claimed in claim 2, wherein:

the end of the driving shaft (420) is provided with a control slot (425), the driving piece (430) comprises a driving handle, and the driving handle can be inserted into the control slot (425);

the locking structure comprises an operating plate (410), wherein the operating plate (410) is arranged at the end part of the driving shaft (420) in a sliding mode and can cover the notch of the control slot (425).

4. A rear door interlock as claimed in claim 3, wherein:

the operation plate (410) is elastically connected to an end of the drive shaft (420) and can elastically slide with respect to the end of the drive shaft (420).

5. A rear door interlock as claimed in claim 3, wherein:

the operating panel (410) is provided with a channel passing groove (415), and the channel passing groove (415) can be driven to be communicated with or dislocated with the control slot (425) when the operating panel (410) slides.

6. A rear door interlock as claimed in claim 1, wherein:

the eccentric structure comprises a crank arm (130), the crank arm (130) is sleeved on the transmission shaft (120), and the eccentric part (135) is arranged at one end, far away from the transmission shaft (120), of the crank arm (130).

7. A rear door interlock as claimed in claim 6, wherein:

the length direction of the crank arm (130) is orthogonal to the length direction of the transmission shaft (120).

8. A rear door interlock as claimed in claim 6, wherein:

an avoiding position (145) is arranged at the end part of the extension rod (140), and the crank arm (130) is connected to the avoiding position (145) so that the crank arm (130) and the extension rod (140) approach to be flush.

9. A rear door interlock as claimed in claim 1, wherein:

the transmission shaft (120) is provided with a positioning step for relative positioning with the mounting rack (500) of the copper bar.

10. A switchgear cabinet comprising a rear door interlock as claimed in any one of claims 1 to 9.