CN215266067U - Interlock system and looped netowrk cabinet - Google Patents

Abstract

Disclosed is an interlock system for opening or covering a ground access hole according to installation or removal of a cable chamber door of a ring main unit, including: an interlock plate device including an interlock plate pivoted about a first fixing pin fixed to a frame of the ring main unit between a covering position in which the interlock plate covers the ground operation hole and an opening position in which the interlock plate opens the ground operation hole; a first pressure plate pivoting about a second fixing pin between a pressing position and a releasing position, the cable compartment door applying pressure to the first pressure plate to pivot the first pressure plate to the pressing position when the cable compartment door is installed in place, the first pressure plate pivoting to the releasing position when the cable compartment door is removed; and a first brake cable connected between the first pressure plate and the interlock plate arrangement such that when the first pressure plate is in the depressed position, the interlock plate is in the open position and when the first pressure plate is in the release position, the interlock plate is in the cover position. Also disclosed is a ring main unit, which comprises the interlocking system.

Description

Interlock system and looped netowrk cabinet

Technical Field

The utility model relates to an interlock system, this interlock system is used for opening the ground connection handle hole when the cable chamber door of looped netowrk cabinet is installed in place on the door frame, and cover the ground connection handle hole when the cable chamber door removes from the door frame; the utility model discloses still relate to a looped netowrk cabinet, it includes this kind of interlocking system.

Background

With the increasing demands on power supply continuity, safety and reliability, the standards of the power department have strict and clear regulations on the requirements. At present when the cable chamber door of looped netowrk cabinet is being removed in order to overhaul etc. operation with needs, the looped netowrk cabinet function does not have motor mechanism's operation order to be: after the main switch is opened, the grounding switch is closed, i.e. the grounding contact of the grounding switch engages with the grounding operating hole, and then the cable compartment door can be removed. However, after the cable chamber door is removed, no device is used for blocking the grounding operation hole, so that the grounding operation hole can be subjected to switching-off operation due to misoperation or unintentional operation and the like, namely, the grounding contact is separated from the grounding operation hole, so that grounding discontinuity is caused, and life safety and property loss of operation and maintenance personnel are threatened. At present, the national network is not allowed to have the misoperation risk when the national network is subjected to the standard throwing.

Therefore, there is a need for an interlock that enables: after the cable chamber door of the ring main unit is moved away, the grounding operation hole can be blocked, so that the grounding switch is prevented from opening.

SUMMERY OF THE UTILITY MODEL

In order to effectively solve the above-mentioned problem, an aspect of the present invention provides an interlock system for opening a ground access hole when a cable chamber door of a ring main unit is installed on site on a door frame, and covering the ground access hole when the cable chamber door is removed from the door frame, the interlock system including:

an interlocking plate device including at least an interlocking plate pivotable about a first fixing pin fixed to a frame of the ring main unit between a covering position in which a covering end of the interlocking plate covers the ground operating hole and an opening position in which the covering end of the interlocking plate opens the ground operating hole,

a first pressure plate pivotable between a pressed position and a released position about a second fixed pin fixed relative to the door frame, wherein, when the cable chamber door is installed in place on the door frame, the cable chamber door applies pressure to a pressing end of the first pressure plate to pivot the first pressure plate to the pressed position, and, when the cable chamber door is removed from the door frame, the first pressure plate is no longer pressurized by the cable chamber door and pivots to the released position, and

a first brake cable connected between a first connection end of the first pressing plate opposite to the pressing end and the interlocking plate device to transmit force and motion between the first pressing plate and the interlocking plate device, so that the interlocking plate is in the open position when the first pressing plate is in the pressing position, and the interlocking plate is in the covering position when the first pressing plate is in the releasing position.

The interlock system of the present invention may also include one or more of the further developments described below.

According to some embodiments, the interlocking plate device may further include a sliding plate and be connected with the first brake cable through the sliding plate so that the first brake cable can apply a tensile force to the sliding plate in a tensile force applying direction, and a second connection end of the interlocking plate opposite to the cover end is connected to the sliding plate, wherein the sliding plate can slide between a first position and a second position and bring the interlocking plate to pivot between the cover position and the open position when the first pressing plate pivots between the pressing position and the releasing position.

According to some embodiments, a first guide groove may be provided on the slide plate, an extending direction of the first guide groove is orthogonal to the tensile force applying direction, and the second connection end of the interlocking plate is inserted into the guide groove through a first guide pin fixedly connected to the second connection end, so that the slide plate slides to pivot the interlocking plate.

According to some embodiments, a locking groove communicating with the first guide groove and extending in the tension applying direction may be further provided on the slide plate, and the first guide pin enters the locking groove and locks movement of the interlocking plate when the interlocking plate is located at the covering position.

According to some embodiments, the interlocking plate device may further include a first elastic member fixedly installed at a first end thereof, a second end of the elastic member opposite to the first end being connected to the slide plate or the interlocking plate,

wherein the first elastic member is provided to:

storing energy when the sled moves from the second position to the first position;

releasing energy to apply a force to the slide plate or the interlock plate in a direction opposite to the pulling force application direction when the slide plate slides from the first position to the second position.

According to some embodiments, the interlocking plate device may further include a bracket fixed to the frame, at least one second guide pin being provided on the bracket, at least one second guide groove extending parallel to the tensile force applying direction being provided on the slide plate, and the corresponding second guide pin being inserted into the corresponding second guide groove to slidably dispose the slide plate on the bracket.

According to some embodiments, the first end of the first elastic member may be fixed to the bracket.

According to some embodiments, at least one insertion hole may be provided on the door frame, at least one hook may be provided on the cable compartment door, the at least one hook is inserted into the at least one insertion hole when the cable compartment door is mounted to the door frame, and one of the hooks extends from the corresponding hook and contacts the pressing end of the first pressing plate, so that the cable compartment door applies a pressing force to the pressing end of the first pressing plate through the hook to pivot the first pressing plate from the release position to the pressing position.

According to some embodiments, the interlock system may further include a second cable connected between the second pressure plate and the crank arm of the ground contact to transmit force and motion between the second pressure plate and the crank arm,

wherein the lever is pivotably mounted on a frame and pivotally brings the ground contact into and out of engagement with the ground operating hole, the second presser plate is provided so as to be movable between a blocking position blocking removal of the hook from the receptacle and an offset position allowing removal of the hook from the receptacle, and

wherein when the ground contact is engaged with the ground handling aperture, the crank arm pulls the second pressure plate away from the receptacle via the second brake cable to move to the offset position; when the grounding contact is separated from the grounding operation hole, the crank arm releases the pulling force on the second brake cable, and the second pressure plate moves to the blocking position.

According to some embodiments, the second pressure plate may be connected to the door frame by a second elastic member, the second elastic member being configured to:

storing energy when the second platen moves from the blocking position to the offset position; and is

Releasing energy to apply a return force to the second platen when the second platen returns from the offset position to the blocking position.

According to another aspect of the utility model, a looped netowrk cabinet is proposed, it includes according to the above interlock system.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present disclosure and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings may be obtained from the drawings without inventive effort. In the drawings:

fig. 1 shows a schematic perspective view of a ring main unit according to an embodiment of the present invention;

fig. 2 shows a schematic perspective view of a cable chamber door of the ring main unit according to an embodiment of the present invention;

figure 3 illustrates a schematic partial perspective view of a door frame of a cable chamber door according to an embodiment of the present invention;

figure 4 schematically shows a detail view of the connection between the hook of a cable chamber door and the receptacle of a door frame according to an embodiment of the invention;

fig. 5 schematically shows a perspective view of a part of the interior of a ring main unit according to an embodiment of the present invention, on which an interlocking plate device of an interlocking system according to an embodiment of the present invention is mounted;

figure 6 schematically illustrates a perspective view of an interlocking plate arrangement of an interlock system according to an embodiment of the present invention;

figure 7 schematically illustrates an exploded view of an interlocking plate arrangement of an interlock system according to an embodiment of the present invention; and

figure 8 schematically illustrates a plan view of a portion of an interlock plate arrangement of an interlock system according to an embodiment of the present invention.

The same reference numbers will be used throughout the drawings to refer to the same or like parts.

List of reference numerals

Ring main unit 1

Frame 2

Grounding operation hole 3

Cable chamber door 10

Hook 41

Door frame 20

Jack 21

First brake cable 31

Second brake cable 32

Mounting member 33

Interlocking plate device 40

Interlocking plate 41

First fixing pin 42

Cover end 43

Second connection end 44

Slide plate 46

First guide groove 47

First guide pin 48

Locking groove 49

First elastic member 50

First end 51 of the first elastic member

Second end 52 of the first resilient member

Support 60

First presser plate 70

Second guide pins 61, 62

Second guide grooves 63, 64

Port 65

Major plane 66 of the bracket

Tab 67

Second fixing pin 71

Pressing end 73

Second connection end 74

Second presser plate 80

Second elastic member 85

Direction of application of tensile force D

Locking force F

Detailed Description

Hereinafter, an interlock system according to an embodiment of the present disclosure is described in detail with reference to the accompanying drawings. To make the objects, technical solutions and advantages of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure.

Thus, the following detailed description of the embodiments of the present disclosure, presented in conjunction with the figures, is not intended to limit the scope of the claimed disclosure, but is merely representative of selected embodiments of the disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

The singular forms include the plural unless the context otherwise dictates otherwise. Throughout the specification, the terms "comprises," "comprising," "has," "having," "includes," "including," "having," "including," and the like are used herein to specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.

In addition, even though terms including ordinal numbers such as "first", "second", etc., may be used to describe various elements, the elements are not limited by the terms, and the terms are used only to distinguish one element from another. For example, a first component could be termed a second component, and, similarly, a second component could be termed a first component, without departing from the scope of the present disclosure.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, or orientations or positional relationships that are conventionally placed when the disclosed products are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are used merely for convenience of describing and simplifying the present disclosure, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present disclosure.

As shown in fig. 1 to 3, according to an embodiment of the present invention, the ring main unit 1 includes a door frame 20 and a cable chamber door 10 for being mounted on the door frame 20, and according to a specific embodiment, one of a hook and a jack is provided on one of the cable chamber door 10 and the door frame 20, and the other of the hook and the jack is provided on the other of the cable chamber door 10 and the door frame 20, so as to assemble the cable chamber door 10 on the door frame 20. When the ring main unit 1 needs to be overhauled, etc., the cable chamber door 10 needs to be removed, and at this time, in order to ensure the personal safety of the overhaul personnel, the main switch needs to be opened, and the grounding switch needs to be closed, that is, the grounding contact is engaged with the grounding operation hole 3 (as shown in fig. 5), and the cable chamber door 10 is removed in this state; in order to ensure that the grounding switch will not be opened when the cable chamber door 10 is removed, i.e. the grounding contact will not be separated from the grounding hole 3, the present invention provides an interlock system for opening the grounding hole 3 when the cable chamber door 10 of the ring main unit 1 is installed on the door frame 20, and covering the grounding hole 3 when the cable chamber door 10 is removed from the door frame 20 so that the grounding contact will not be separated from the grounding hole 3.

According to one embodiment, as shown in fig. 2-7, the interlock system includes an interlock plate arrangement 40 and a first pressure plate 70 connected to each other by a first brake cable 31. The interlocking plate device 40 includes at least an interlocking plate 41, and the interlocking plate 41 is pivotable about a first fixing pin 42 fixed to the frame 2 of the ring main unit between a covering position in which a covering end 43 of the interlocking plate 41 covers the ground operating hole 3 and an opening position in which the covering end 43 of the interlocking plate 41 opens the ground operating hole 3. The first pressing plate 70 is provided to be pivotable about a second fixing pin 71 fixed with respect to the door frame 20 between a pressing position and a releasing position, wherein, when the cable compartment door 10 is mounted in place on the door frame 20, the cable compartment door 10 can apply pressure to the pressing end 73 of the first pressing plate 70 to pivot the first pressing plate 73 to the pressing position, and when the cable compartment door 10 is removed from the door frame 20, the first pressing plate 70 is no longer pressed by the cable compartment door 10 and pivots to the releasing position. First brake cable 31 is then connected between a first connecting end 74 of first pressure plate 70 opposite pressing end 73 and interlocking plate arrangement 40 to transfer force and motion between first pressure plate 70 and interlocking plate arrangement 40 such that when first pressure plate 70 is in the pressing position, interlocking plate 41 is in the open position and when first pressure plate 70 is in the release position, interlocking plate 41 is in the covering position.

That is, according to the utility model discloses an interlock system can realize opening or covering the ground connection handle hole with the installation of cable chamber door on the door frame is on the throne and remove to the linkage through compact structure, less part and operating procedure and save operating energy to save the cost.

According to a more specific embodiment, as shown in fig. 2-4, one or more insertion holes 21 (fig. 3) are provided on door frame 20, and one or more hooks 11 (fig. 2) are correspondingly provided on cable chamber door 10. When the cable chamber door 10 is mounted to the door frame 20, the hooks 11 are inserted into the corresponding insertion holes 21. And in this case, as shown in more detail in fig. 4, the first presser plate 70 is positioned with its pressing end 73 located below one of the insertion holes 21, the corresponding hook 11 is inserted into the insertion hole 21 and protrudes below the insertion hole 21 to contact the pressing end 73 of the first presser plate 70 located below the insertion hole 21, so that the cable chamber door 10 applies a downward pressing force to the pressing end 73 of the first presser plate 70 through the hook 11 to pivot the first presser plate 70 to a pressing position about the second fixing pin 71, clockwise in fig. 4, when the first connection end 74 of the first presser plate 70 connected to the first brake cable 31 will generate a pulling force to the first brake cable 31, which is then transmitted from the first brake cable 31 to the interlock plate device 40 in the pulling force applying direction D (as shown in fig. 5), which will enable the interlock plate 41 of the interlock plate device 40 to rotate about the first brake cable 42 to open the ground operating hole 3, the grounding switch is allowed to perform opening operation.

Also in this case, when it is desired to remove cable compartment door 10 from door frame 20, cable compartment door 10 may first be lifted upwards so that hook 11 moves upwards in insertion hole 21 and is free from the constraint of insertion hole 21, at which point hook 11 will also no longer contact and press pressing end 73 of first pressure plate 70, pressing end 73 is released and pivots from the pressed position about second securing pin 71 to the released position, and in the counterclockwise direction in fig. 4 pressing end 73 will consequently release the pulling force on first brake cable 31 so that interlock plate 41 of interlock plate device 40 can pivot about first securing pin 42 from the open position to the covering position, at which point covering section 43 of interlock plate 41 covers ground operating hole 3 to prevent the ground switch from performing a tripping operation.

Therefore, in this specific embodiment, "linkage" between cable chamber door 10 and interlocking plate 41 of interlocking plate device 40 is realized through first pressing plate 70 and first brake cable 31, so that pivoting of first pressing plate 70 can be realized only through the gravity of cable chamber door 10, and pivoting of interlocking plate 41 is realized, which makes the utility model discloses an interlocking system does not need extra operating power and part, further ensures cost-effectiveness, and makes interlocking system compact structure, can make full use of the inner space of ring main unit.

Of course, in an embodiment not shown, the pressing portion provided on the cable compartment door may be used to apply a pressing force in the gravity direction to the pressing end of the first pressing plate when the cable compartment door is mounted on the doorframe. Or it may be arranged such that the cable compartment door, when mounted on the door frame, applies a pressing force to the first pressing plate in a direction perpendicular to the direction of gravity, and this pressing force may likewise be transmitted to the interlocking plate via the first brake cable, so that the interlocking plate pivots from the covering position to the opening position. That is, the foregoing detailed description is illustrative only and not intended to be exhaustive.

In a more specific embodiment, as shown in fig. 4, the interlock system may further include a second cable 32, the second cable 32 being connected between the second pressure plate 80 and a crank arm (not shown) of the ground contact to transmit force and motion therebetween. In this embodiment, the crank arm is mounted, for example, so as to be able to pivot about a third pivot pin, not shown, fixed to the frame and thus bring the ground contact into and out of engagement with the ground handling aperture 3; the second presser plate 80 is then arranged to be movable between a blocking position blocking removal of the hooks 11 from the corresponding insertion holes 21 and an offset position allowing removal of the hooks 11 from the insertion holes 21. And in this embodiment, when it is desired to remove cable compartment door 10 from door frame 20 and the other crank arm pivots to engage the ground contact with ground access hole 3, i.e. to perform a ground switch closing operation, the crank arm can apply a pulling force to second cable 32 and thus cause second cable 32 to pull second pressure plate 80 away from insertion hole 21 to move to an offset position (to the left in fig. 4), at which time second pressure plate 80 will no longer block the insertion hole, so that when cable compartment door 10 is lifted up, hook 11 can come out of insertion hole 21 and cable compartment door 10 can be removed from door frame 20. In the particular embodiment shown in fig. 4, when cable chamber door 10 is installed in place on door frame 20, second pressure plate 80 is, for example, at least partially positioned over corresponding receptacle 21 to block hook 11 from being removed from receptacle 21. Furthermore, in this embodiment, when the cable compartment door 10 is mounted on the door frame 20 and the opening operation of the earthing switch is performed, the crank arm will be pivoted and thus bring the earthing contact apart from the earthing operation hole 3, at which time the crank arm will release the pulling force on the second brake cable 32, and the second pressing plate 80 will return from the offset position to the blocking position, so that the second pressing plate 80 again obstructs the hook 11 of the cable compartment door 10 from being pulled out of the insertion hole 21 of the door frame 20.

In this more specific embodiment, the linkage between the crank arm of the ground contact and the second pressure plate is realized through the second brake cable, the operating energy is effectively and fully utilized, and the cost benefit is further facilitated.

Further specifically, the second presser plate 80 may be connected to the door frame 10 by a second elastic member 85, the second elastic member 85 being, for example, a tension spring or a compression spring, and being configured such that when the second presser plate 80 moves from the blocking position to the displaced position, the second elastic member 85 stores energy, and when the second presser plate 80 returns from the displaced position to the blocking position, the second elastic member 85 releases the energy to apply a return force to the second presser plate 80. For example, the second resilient member 85 is shown in fig. 4 as a compression spring connected between the mounting member 33 fixed relative to the door frame and the left side of the second pressure plate 80, i.e., the compression spring will be compressed and store energy when the second pressure plate 80 is moved leftward from the blocking position to the displaced position, and the compression spring releases energy to urge the second pressure plate 80 toward the blocking position when the second pressure plate 80 needs to be returned from the displaced position to the blocking position. Thus, the provision of the second elastic member 85 further ensures that the second presser plate 80 can be returned to the blocking position when necessary, further ensuring safety.

More specifically, as shown in fig. 4, it is also possible to provide holes in the mounting 33 for actuating the first and second brake cables 31 and 32, respectively, so as to perform a retaining and guiding function for the first and second brake cables 31 and 32.

As shown in fig. 5-7, to facilitate the linkage between first pressure plate 70 and interlocking plate 41 via first brake cable 31, in some embodiments, interlocking plate arrangement 40 may further include a sliding plate 46 and be connected to first brake cable 31 via sliding plate 46 such that first brake cable 31 can apply a pulling force to the sliding plate in pulling force application direction D, while a second connecting end 44 of interlocking plate 41 opposite covering end 43 is connected to sliding plate 46 such that as first pressure plate 70 pivots between the pressed position and the released position, sliding plate 46 can slide between the first position and the second position and cause interlocking plate 41 to pivot between the covered position and the opened position. As best shown in fig. 7, in a more specific embodiment, a first guide groove 47 may be provided on the slide plate, and the first guide groove 47 may extend in a direction orthogonal to the tensile force applying direction D, while the second coupling end 44 of the interlocking plate 41 is inserted into the first guide groove 47 through a first guide pin 48 fixedly coupled to the second coupling end 44, so that the slide plate 46 pivots the interlocking plate 41 as it slides. That is, when the sliding plate 46 slides between the first position and the second position, the first guide pin 48 fixedly connected with the second connecting end 44 of the interlocking plate 41 may slide therealong in the first guide slot 47, thereby allowing the first guide pin 48, and thus the second connecting end 44 of the interlocking plate 41, to simultaneously slide along the first guide pin 48 and with the sliding plate 46, thereby enabling pivoting of the interlocking plate 41 about the first fixing pin 42.

Further, as best shown in fig. 7 and 8, a locking groove 49 communicating with the first guide groove 47 and extending in the tension applying direction D may be further provided on the slide plate 46 such that when the interlocking plate 41 is located at the covering position, the first guide pin 48 enters the locking groove 49 and locks the movement of the interlocking plate 41, thereby effectively preventing the covering end 43 of the interlocking plate 41 from moving away from the ground operating hole 3, ensuring complete safety. That is, as shown in fig. 8, since the first guide pin 48 has entered the lock groove 49 when the interlock plate 41 is in the covering position, even if the slide plate 46 does not slide, the first guide pin 48 does not move because the lock groove 49 will apply the locking force F in the direction perpendicular to the sliding direction (i.e., the tensile force applying direction D) to the first guide pin 48, thereby ensuring that the covering end 43 of the interlock plate 41 maintains the covering of the ground operation hole 3, even if the slide plate 46 inadvertently hits the interlock plate 41. When the first brake cable 31, the first brake cable 31 and the slide plate 46 are pulled by pressing the pressing end 73 of the first pressing plate 70 when the cable compartment door 10 is mounted in place on the door frame 20, the slide plate 46 slides in the tension applying direction D, so that the first guide pin 48 comes out of the lock groove 49 and slides in the first guide groove 47, i.e., such a lock groove 49 only exerts a locking action on the interlocking plate 41 in the covering position thereof, and does not exert any locking action on the interlocking plate 41 when the interlocking plate 41 pivots from the covering position to the opening position.

More specifically, as shown in fig. 6 to 7, the interlocking plate device 40 may further include a first elastic member 50, the first elastic member 50 is, for example, a tension spring and a compression spring (shown as a tension spring in the figures), a first end 51 thereof is, for example, fixedly mounted to the frame 2 of the ring main unit 1, and a second end 52 opposite to the first end 51 may be connected to the sliding plate 46 or the interlocking plate 41 (shown as being connected to the interlocking plate 41). The first elastic member 50 is provided: energy is stored when the slide plate 46 is moved from the second position to the first position, and energy is released to apply a force to the slide plate 46 or the interlock plate 41 in a direction opposite to the tensile force application direction D when the slide plate 46 is slid from the first position to the second position. This further ensures that slide plate 46 is returned to the second position, pivoting interlock plate 41 to the covering position, when desired.

More specifically, in the embodiment shown in the drawings, when the cable compartment door 10 is mounted on the door frame 20, the cable compartment door 10 applies a pressing force to the pressing end 73 of the first pressing plate 70, for example, by one of the hooks 11 thereof, causing the first pressing plate 73 to pivot along the second fixing pin 71 and thus pull the first brake cable 31 connected to the first connection end 74 of the first pressing plate 70, the first brake cable 31 in turn applies a pulling force to the sliding plate 46 in, for example, an upward pulling force applying direction D, so that the sliding plate 46 moves upward, the first guide pin 48 comes out of the lock slot 49 and enters the first guide slot 47 to slide leftward along the first guide slot 47, and the interlocking plate 41 pivots in the clockwise direction, at which time the tension spring connected between the chassis 2 and the interlocking plate 41, i.e., the first elastic member 50, is stretched and thus stores energy. When the cable compartment door 10 is removed from the door frame 20, the hook 11 of the cable compartment door 10 leaves the pressing end 73 of the first pressing plate 70 and thus releases the first pressing plate 70, the first pressing plate 70 does not generate a pulling force on the first brake cable 31 and pivots counterclockwise, and at the same time, the tension spring, i.e., the first elastic member 50, retracts and releases energy to generate a downward pulling force on the interlocking plate 41, so that the first guide pin 48 of the interlocking plate 41 moves leftward in the first guide groove 47 and pivots counterclockwise about the first fixing pin 42, and when the interlocking plate 41 pivots to the covering position, the first guide pin 48 enters the locking groove 49 and can not move any more. Thus, the interlocking between the cable chamber door 10 and the interlocking plate 41 is further ensured by the provision of the first elastic member 50 without applying additional energy, and the effectiveness, the ease of operation, and the cost-effectiveness of the interlocking system are further ensured in a compact configuration.

More specifically, as shown in fig. 6 to 7, interlocking plate device 40 may further include a bracket 60 fixed to frame 2, bracket 60 being fixed to frame 2, for example, by bolts, at least one second guide pin 61, 62 (two shown in the drawings) being provided on bracket 60, at least one second guide groove 63, 64 (two shown in the drawings) extending parallel to the above-described tension applying direction D being provided on slide plate 46, and respective second guide pins 61, 62 being inserted into respective second guide grooves 63, 64 to slidably dispose slide plate 46 on bracket 60. This achieves a support and guidance of the slide plate 46 with a very simple and robust construction. Further, a guide rail for guiding the sliding of the slide plate 46 may be provided on the bracket 60. Further, as shown in fig. 7, the bracket 60 can also be provided with an aperture 65 for the passage of the first cable 31, this aperture 65 being more specifically provided on a tab 67 projecting with respect to the main plane 66 of the bracket 60, so as to provide a guiding and retaining action for the first cable 31.

It should be noted that the directions shown in all the drawings are schematic.

The exemplary embodiment of the interlock system proposed by the present invention has been described in detail with reference to the preferred embodiments, however, it will be understood by those skilled in the art that various modifications and changes can be made to the above specific embodiments without departing from the concept of the present invention, and various combinations of the various technical features and structures proposed by the present invention can be made without departing from the scope of the present invention.

The scope of the present disclosure is not defined by the above-described embodiments but is defined by the appended claims and equivalents thereof.

Claims (11)

1. An interlock system for opening a ground access opening when a cable chamber door of a ring main unit is installed in place on a doorframe and covering the ground access opening when the cable chamber door is removed from the doorframe, the interlock system comprising:

an interlocking plate device at least comprising an interlocking plate capable of pivoting around a first fixing pin fixed to a frame of the ring main unit between a covering position and an opening position, wherein the covering end of the interlocking plate covers the grounding operation hole, and the covering end of the interlocking plate opens the grounding operation hole;

a first pressure plate pivotable about a second fixed pin fixed relative to the door frame between a pressed position and a released position, wherein when the cable compartment door is installed in place on the door frame, the cable compartment door applies pressure to a pressing end of the first pressure plate to pivot the first pressure plate to the pressed position, and when the cable compartment door is removed from the door frame, the first pressure plate is no longer under pressure from the cable compartment door and pivots to the released position; and

a first brake cable connected between a first connection end of the first pressing plate opposite to the pressing end and the interlocking plate device to transmit force and motion between the first pressing plate and the interlocking plate device, so that the interlocking plate is in the open position when the first pressing plate is in the pressing position, and the interlocking plate is in the covering position when the first pressing plate is in the releasing position.

2. The interlock system of claim 1 wherein said interlock plate assembly further comprises a slide plate and is connected to said first brake cable through said slide plate such that said first brake cable can apply a tensile force to said slide plate in a tensile force application direction, a second connecting end of said interlock plate opposite said cover end being connected to said slide plate,

wherein the slide plate is slidable between a first position and a second position and drives the interlock plate to pivot between the cover position and the open position when the first pressure plate pivots between the pressed position and the released position.

3. The interlock system of claim 2, wherein a first guide groove is provided on said slide plate, said first guide groove extends in a direction orthogonal to said tension applying direction, and said second connecting end of said interlock plate is inserted into said guide groove via a first guide pin fixedly connected to said second connecting end, so that said slide plate pivots said interlock plate as it slides.

4. The interlock system of claim 3, wherein a locking groove communicating with said first guide groove and provided along said tension applying direction is further provided on said slide plate, and when said interlock plate is located at said covering position, said first guide pin enters said locking groove and locks the movement of said interlock plate.

5. The interlock system according to any one of claims 2 to 4 wherein the interlock plate device further comprises a first resilient member fixedly mounted at a first end thereof, a second end of the first resilient member opposite the first end being connected to the slide plate or the interlock plate,

wherein the first elastic member is provided to:

storing energy when the sled moves from the second position to the first position;

releasing energy to apply a force to the slide plate or the interlock plate in a direction opposite to the pulling force application direction when the slide plate slides from the first position to the second position.

6. The interlock system of claim 5 wherein said interlock plate assembly further comprises a bracket fixed to said frame, at least one second guide pin disposed on said bracket, at least one second guide slot extending parallel to said tension applying direction disposed on said slide plate, a corresponding second guide pin inserted into a corresponding second guide slot to slidably position said slide plate on said bracket.

7. The interlock system of claim 6 wherein said first end of said first resilient member is secured to said bracket.

8. The interlock system according to any one of claims 1 to 4, wherein at least one insertion hole is provided on the door frame, at least one hook is provided on the cable compartment door, the at least one hook is inserted into the at least one insertion hole when the cable compartment door is mounted to the door frame, and one of the hooks extends from the corresponding hook and contacts the pressing end of the first presser plate, so that the cable compartment door applies a pressing force to the pressing end of the first presser plate through the hook to pivot the first presser plate from the release position to the pressing position.

9. The interlock system of claim 8 further comprising a second cable connected between a second pressure plate and a crank arm of a ground contact to transmit force and motion between the second pressure plate and the crank arm,

wherein the lever is pivotably mounted on a frame and pivotally brings the ground contact into and out of engagement with the ground operating hole, the second presser plate is provided so as to be movable between a blocking position blocking removal of the hook from the receptacle and an offset position allowing removal of the hook from the receptacle, and

wherein when the ground contact is engaged with the ground handling aperture, the crank arm pulls the second pressure plate away from the receptacle via the second brake cable to move to the offset position; when the grounding contact is separated from the grounding operation hole, the crank arm releases the pulling force on the second brake cable, and the second pressure plate moves to the blocking position.

10. The interlock system of claim 9 wherein the second pressure plate is connected to the door frame by a second resilient member, the second resilient member being configured to:

storing energy when the second platen moves from the blocking position to the offset position; and is

Releasing energy to apply a return force to the second platen when the second platen returns from the offset position to the blocking position.

11. Ring main unit, characterized in that it comprises an interlocking system according to any of claims 1 to 10.

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