CN113922226B - Anti-condensation high-safety ring network switch cabinet - Google Patents

Abstract

The invention discloses an anti-condensation high-safety ring network switch cabinet, which comprises a cabinet body, wherein a vacuum circuit breaker and a compound switch assembly are arranged in the cabinet body, the compound switch assembly comprises a shell, a disconnecting switch and a grounding switch, two operation parts are arranged on the compound switch assembly, and two corresponding operation holes are arranged on the shell; the front side of the cabinet body is provided with a door plate, the door plate is provided with a window, and an operating rod can pass through the window and the operating hole to enter the operating part for opening and closing the brake only after the door plate is installed; in addition, in the structure, the door plate can be opened only when the grounding switch is in a closing state, and the cabinet body is not electrified, so that the safety is high; the bottom of the cabinet body is positioned at the position of the cable inlet hole and is also provided with a condensation preventing mechanism, so that external water vapor is prevented from entering the cabinet body to generate condensation. The anti-condensation high-safety ring network switch cabinet disclosed by the invention is convenient to operate, high in safety performance and free from condensation.

Description

Anti-condensation high-safety ring network switch cabinet

Technical Field

The invention relates to the technical field of electrical equipment, in particular to an anti-condensation high-safety ring network switch cabinet.

Background

When the existing ring main unit is used outdoors, the bottom of the ring main unit is a semi-submersible cable well according to the requirement of the installation standard, and the depth of the ring main unit is not less than 1.3 meters. The cable in the ring main unit passes through the through hole on the ring main unit bottom plate and enters the cable well, and then is connected with other circuits.

However, due to the problems of cable pipeline sewage filling, rainwater collection and the like, ponding with different degrees exists in the cable shaft. The long-term existence of the accumulated water generates a large amount of water vapor, and the water vapor enters the cabinet body through the through hole used for the cable to pass through on the bottom plate of the ring main unit body, so that condensation is easy to form under the condition of large temperature difference. Because the cabinet body is in a state with large moisture for a long time, the operating mechanism is rusted, the insulation degree is reduced, and the safe operation of equipment is seriously affected. More than 70% of outdoor ring main units are counted to have obvious condensation phenomenon. Because of the high requirement of the power supply reliability, the condensation cannot be treated by power failure under the non-special condition, and therefore, the scheme for solving the condensation problem under the condition of no power failure is only feasible.

The technical scheme for solving the condensation phenomenon in the prior art mainly monitors the humidity and the temperature in the ring main unit through intelligent control, so that the condensation problem in the ring main unit is solved, but corresponding devices or components or mechanisms are added, so that the production cost is increased on one hand, and on the other hand, due to small space in the ring main unit, the circuits are crowded and inconvenient to overhaul due to the addition of the components.

In addition, in the ring main unit in the prior art, when the door plate is required to be disassembled for maintenance, the door plate can be directly disassembled under any condition. Thus, there is a situation that when the grounding switch is not in a closing state, the cable chamber door is directly opened, so that potential safety hazards exist, and electric shock risks possibly exist.

On the other hand, when the grounding switch is operated from the outside of the cabinet body, tools such as an operating wrench and the like need to pass through the door plate of the cable chamber door to operate, and certainly, the composite switch can also be directly operated after the cable chamber door is detached, so that obvious potential safety hazards exist.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: the ring network switch cabinet is convenient to operate, high in safety performance and free from condensation.

The technical scheme adopted by the invention is as follows: the utility model provides a high security looped netowrk switch cabinet of anti-condensation, including the cabinet body, the cabinet body in install vacuum circuit breaker and compound switch module, just the operating device of vacuum circuit breaker and the operating device of compound switch module interlock mutually, compound switch module include casing, isolator and earthing switch install respectively in the casing, just compound switch module on be equipped with two operation portions that are used for controlling isolator and earthing switch to close or break brake respectively, be equipped with the operation hole corresponding with two operation portions on the casing; the front side of the cabinet body is detachably provided with a door plate, the door plate is provided with a window, the front panel of the shell is exposed out of the window, and the door plate is provided with a positioning block; the combined switch assembly is also provided with a first limiting mechanism, and when the door plate is installed on or separated from the cabinet body, the positioning block is matched with or separated from the first limiting mechanism so as to enable the operation part to be communicated or blocked with the corresponding operation hole; the second limiting mechanism is further arranged in the shell and connected with an operating part of the grounding switch, and when the grounding switch is switched off or switched on, the second limiting mechanism is driven to correspondingly move so as to lock or unlock the door plate;

the bottom plate of the cabinet body is provided with a wire inlet hole, the bottom plate is provided with a box body above the wire inlet hole, the box body is provided with a wire passing through hole for a power cable to pass through, the periphery of the cable in the inner cavity of the box body is provided with a sealing layer, a separation gasket is arranged between the bottom of the sealing layer and the upper surface of the bottom plate, and the separation gasket is sealed and arranged outside the cable; the side wall of the box body is provided with at least one injection hole for injecting foaming agent; the top of the box body is provided with a fixed sleeve, a plurality of limiting elastic pieces are arranged in the fixed sleeve along the circumferential direction, the limiting elastic pieces are uniformly arranged between the cable and the fixed sleeve along the circumferential direction, one end of each limiting elastic piece is connected with the fixed sleeve, and the other end of each limiting elastic piece is in limiting abutting contact with the side wall of the cable; the clamping mechanism for radially limiting the cable is arranged at the position, close to the wire inlet, below the bottom plate.

Compared with the prior art, the invention has the following advantages:

according to the sealing structure of the incoming cable of the ring main unit, the sealing gasket and the sealing layer are adopted to seal the gap between the incoming cable and the incoming hole, and the fixed sleeve and the limiting elastic piece structure are further arranged to clamp and limit the cable above the sealing structure, so that an intelligent dehumidification device is not required to be additionally arranged, the production cost is saved, on one hand, the installation of the incoming cable is not affected, on the other hand, the water vapor in the pit is completely isolated, the condensation phenomenon of the water vapor in the ring main unit is reduced, the components in the ring main unit are effectively protected from being damaged, and the normal operation of the ring main unit is ensured.

In addition, the clamping mechanism is arranged at the bottom of the sealing structure, the limiting component for fixing the incoming cable is arranged below the bottom plate, and the clamping mechanism and the limiting component are arranged to ensure the stability of the cable, so that the cable is kept in a better linear state, the sealing performance of the sealing mechanism is not affected due to shaking of the cable at other parts, and the cable at the sealing structure is stably limited all the time;

more importantly, a first limiting mechanism is arranged on the composite switch assembly and used for controlling an operation part of the composite switch assembly, specifically, a positioning block is arranged on a door plate at a position corresponding to the first limiting mechanism on the composite switch assembly, when the door plate is installed with the cabinet body, the positioning block is matched with the first limiting mechanism, and at the moment, an external operation wrench can directly penetrate through an operation hole on the shell to perform related closing or opening operation on the composite switch; when the door plate is separated from the cabinet body, the first limiting component performs corresponding blocking treatment on the operation hole and the compound switch, at this time, an external operation wrench cannot operate the compound switch, misoperation cannot occur under the condition that the door plate is not assembled after the design, and safety of operators is ensured. In addition, the second limiting mechanism is further arranged in the shell to correspondingly lock and limit the door plate, specifically, when the grounding switch is in the opening state, the second limiting mechanism has a locking function on the door plate, the door plate cannot be directly opened at this time, and only when the grounding switch is in the closing state, the second limiting mechanism loses the locking on the door plate, the door plate can be opened, so that when the door plate is opened, the cabinet body cannot be electrified, and the personal safety of operators when the operator overhauls similar lines is further ensured.

As an improvement, the limiting elastic piece is an L-shaped elastic piece, a limiting step is arranged at the top of the fixed sleeve, the end part of the horizontal section of the limiting elastic piece is propped against the limiting step, and the vertical section of the limiting elastic piece is propped against the outer side wall of the cable; the side wall of the fixed sleeve is uniformly provided with a plurality of fixed bolts along the circumferential direction, and the end parts of the fixed bolts correspondingly lean against the vertical sections of the limiting elastic pieces.

Still improve, clamping mechanism includes the backup pad, the lower surface at the bottom plate is connected to the backup pad, the backup pad on be equipped with the central line hole, the lower extreme and the coaxial wedge groove that is equipped with in central line hole of backup pad, wedge inslot join in marriage be equipped with rather than wedge angle assorted wedge, wedge be connected with the backup pad, and be equipped with the central spacing hole that supplies the cable to pass through with central line hole coaxial on the wedge. The setting of clamping mechanism mainly fixes spacing to the cable of bottom plate below, prevents that it from rocking, reduces the striking of cable to the sealing layer, has also increased sealed stability simultaneously.

Preferably, the first limiting mechanism comprises a limiting plate and a linkage rod, wherein the limiting plate is slidably arranged in the shell along the vertical direction, and a through hole corresponding to the operation hole is formed in the limiting plate; the top of the shell is provided with a fixed seat, the linkage rod is hinged on the fixed seat, one end of the linkage rod is hinged with the top of the limiting plate, the other end of the linkage rod is provided with a fitting part, when the door plate is arranged on the cabinet body, the lower surface of the positioning block is matched with the upper surface of the fitting part, and the linkage rod rotates along a hinge point on the fixed plate so as to drive the limiting plate to move upwards, and a through hole on the limiting plate is communicated with the operation hole; when the door plate is separated from the cabinet body, the limiting plate moves downwards under the action of self gravity, and the through hole is blocked with the operation hole.

Still further, the second limiting mechanism comprises two limiting blocks, a connecting plate and a pressing rod, wherein the two limiting blocks are slidably arranged on the shell along the vertical direction, one end of each limiting block extends out of the shell, and the other end of each limiting block is positioned in the shell; two ends of the connecting plate are respectively connected with one end of the two limiting blocks, which is positioned in the shell, the upper end of the pressing rod is connected with the operating part of the grounding switch, and the lower end of the pressing rod slides against the connecting plate; the door plate is provided with two limiting seats respectively matched with one ends of the limiting blocks, which extend out of the shell, when the grounding switch is switched on or off, the lower end of the pressing rod slides on the connecting plate and is used for controlling the limiting blocks to move downwards or upwards, so that the limiting blocks are matched with or separated from the limiting seats.

As an improvement, mounting seats are arranged at two ends of the bottom of the inner cavity of the shell, a containing groove with an opening at the upper part is arranged on the mounting seats, and one end of the limiting block, which is positioned in the shell, is slidably arranged in the containing groove; the accommodating groove is internally provided with a spring, one end of the spring is connected to the bottom of the accommodating groove, and the other end of the spring is connected with the bottom of the limiting block. The spring structure has a buffering effect, so that the up-and-down movement of the limiting block is more gentle and stable.

And the upper surface of the connecting plate is provided with a downward-bent circular arc track, one end of the pressing rod, which is close to the connecting plate, is provided with a roller, and the roller is slidably assembled in the circular arc track. The roller and the track structure are arranged to enable sliding fit of the pressing rod and the connecting plate to be smoother, so that control of up-and-down movement of the limiting block is better achieved.

Drawings

Fig. 1 is a schematic diagram of a front structure of a condensation-preventing high-safety ring main unit of the present invention.

Fig. 2 is a schematic diagram of an internal side structure of the anti-condensation high-safety ring main unit of the present invention.

Fig. 3 is a partial schematic diagram of a high security ring network switch cabinet with anti-condensation according to the present invention.

Fig. 4 is a schematic view of a cable entry seal structure in the present invention.

Fig. 5 is an enlarged schematic view of the structure at X in fig. 4.

Fig. 6 is an enlarged structural view at a in fig. 3.

Fig. 7 is an enlarged structural view of another state at a in fig. 3.

Fig. 8 is a schematic structural view of a limiting plate in the present invention.

Fig. 9 is a schematic structural view of the door panel of the present invention.

Fig. 10 is a front sectional view of the compound switch assembly in this embodiment. (Main display limiting mechanism)

Fig. 11 is a front sectional view of another state of the compound switch assembly in the present embodiment.

Fig. 12 is a schematic view of a part of the door panel and the limiting seat according to the present invention.

Fig. 13 is a schematic side view of the door panel of the present invention.

Fig. 14 is an enlarged structural view at B in fig. 3.

Fig. 15 is an enlarged structural view at C in fig. 13.

Fig. 16 is an enlarged structural view of D in fig. 13.

Fig. 17 is a schematic structural view of a fixing plate in the present invention.

Wherein 1-cabinet, 1.1-column, 1.1-fitting hole, 2-vacuum breaker, 3-composite switch assembly, 4-housing, 4.1-operating hole, 4.2-waist-shaped hole, 5-door panel, 5.1-window, 5.2-jack, 6-positioning block, 7-limiting plate, 7.1-through hole, 7.2-connecting plate, 7.3-avoidance through hole, 7.4-guide plate, 7.5-limiting slide bar, 8-linkage rod, 8.1-fitting part, 9-fixing seat, 10-limiting support, 11-limiting block, 12-connecting plate, 13-pressing plate, 14-limiting seat, 14.1-fitting groove, 15-mounting seat, 15.1-containing groove, 16-spring, 17-roller and 18-fixing plate, 18.1-limit parts, 18.2-limit grooves, 18.3-arc-shaped bulges, 19-vertical slots, 20-limit cross bars, 20.1-limit grooves, 21-L-shaped plugboards, 22-horizontal limit boards, 22.1-limit bulges, 23-side plugboards, 24-mounting holes, 25-guide rods, 26-wire inlet holes, 27-boxes, 27.1-wire through holes, 27.2-injection holes, 28-sealing layers, 29-blocking gaskets, 30-fixing sleeves, 30.1-limit steps, 31-limit elastic pieces, 32-fixing bolts, 33-supporting plates, 33.1-center line holes, 33.2-wedge grooves, 34-wedge blocks, 34.1-center limit holes, 35-buffering cushions and 36-buffering springs.

Description of the embodiments

The invention is further described below with reference to the drawings and the detailed description.

In the description of the present invention, it should be noted that the terms "front side," "top," "upper surface," "lower surface," "upper end," "lower end," "bottom," "downward," "upper portion," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "fitted" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1-17, the invention provides a condensation-preventing high-safety ring network switch cabinet, which comprises a cabinet body 1, wherein a vacuum circuit breaker 2 and a composite switch assembly 3 are arranged in the cabinet body 1, the vacuum circuit breaker 2 is arranged above the cabinet body 1, the composite switch assembly 3 is positioned at the lower position of the vacuum circuit breaker, and an operating mechanism of the vacuum circuit breaker 2 is interlocked with an operating mechanism of the composite switch assembly 3.

The compound switch assembly 3 comprises a shell 4, a disconnecting switch and a grounding switch, wherein the disconnecting switch and the grounding switch are respectively arranged in the shell 4, two operation parts for respectively controlling the disconnecting switch and the grounding switch to be switched on or off are arranged on the compound switch assembly 3, operation holes 4.1 corresponding to the two operation parts are arranged on the shell 4, and specifically, corresponding installation holes 24 for the operation wrenches to be matched are formed in the respective operation parts, a guide rod 25 is further arranged on the compound switch assembly 2, and the guide rod 25 penetrates through the shell 4 to extend outwards.

The front side of the cabinet body 1 is detachably provided with a door plate 5, the door plate 5 is provided with a window 5.1, the front panel of the shell 4 is exposed out of the window 5.1, a guide rod 25 extends outwards to penetrate through the door plate 5, when an operation wrench is used for operating the isolating switch or the grounding switch, the middle part of the operation wrench is limited on the guide rod 25, and the operation end of the operation wrench penetrates through the operation hole 4.1 to be matched with the operation part to operate the closing or opening of the corresponding switch.

As shown in fig. 3, 4 and 5, a wire inlet hole 26 for allowing a cable 100 to pass through the cabinet 1 is formed in a bottom plate of the cabinet 1, a box 27 is arranged above the wire inlet hole 26 on the bottom plate, a wire through hole 27.1 for allowing the cable 100 to pass through is formed in the box 27, a sealing layer 28 is arranged around the cable 100 in an inner cavity of the box 27, and the sealing layer 28 is formed by foaming and filling of BBS.

A blocking gasket 29 is arranged between the bottom of the sealing layer 28 and the upper surface of the bottom plate, and the blocking gasket 29 is sealed and sleeved outside the cable 100; the side wall of the box 27 is provided with at least one injection hole 27.2 for injecting a foaming agent.

The top of box 27 is equipped with fixed sleeve 30, is equipped with a plurality of spacing shell fragment 31 along circumference in the fixed sleeve 30, and a plurality of spacing shell fragment 31 evenly establish between cable 100 and fixed sleeve 30 along the circumferencial direction, and the one end and the fixed sleeve 30 of spacing shell fragment 31 are connected, and the other end is spacing to be held against on the lateral wall of cable 100.

Specifically, the limiting elastic piece 31 is an L-shaped elastic piece, the top of the fixed sleeve 30 is provided with a limiting step 30.1, the end part of the horizontal section of the limiting elastic piece 31 is propped against the limiting step 30.1, and the vertical section of the limiting elastic piece 31 is propped against the outer side wall of the cable 100; a plurality of fixing bolts 32 are uniformly arranged on the side wall of the fixing sleeve 30 along the circumferential direction, and the end parts of the fixing bolts 32 correspondingly lean against the vertical sections of the limiting elastic pieces 31.

The outer wall of the inner part of the fixing sleeve 30, which is positioned on the fixing bolt 32, is also sleeved with the buffer spring 36, one end of the buffer spring 36 is propped against the inner wall of the fixing sleeve 30, the other end of the buffer spring 36 is propped against the vertical section of the L-shaped elastic sheet, after the buffer spring 36 is arranged, the compression effect of the fixing bolt 32 and the L-shaped elastic sheet is more stable, and when the pressing force of the L-shaped elastic sheet to the cable 100 is regulated through the fixing bolt 32, the buffer spring 36 has a certain buffer effect, and the regulation is more accurate.

A clamping mechanism for radially limiting the cable 100 is arranged below the bottom plate and close to the wire inlet 26.

Specifically, as shown in fig. 4, the clamping mechanism includes a support plate 33, the support plate 33 is connected to the lower surface of the bottom plate, a central line hole 33.1 is formed in the support plate 33, a wedge-shaped groove 33.2 is coaxially formed at the lower end of the support plate 33 and the central line hole 33.1, and the cross section of the wedge-shaped groove 33.2 is in an inverted trapezoid shape. Wedge-shaped blocks 34 matched with the wedge-shaped angles of the wedge-shaped grooves 33.2 are assembled in the wedge-shaped grooves 33.2, the wedge-shaped blocks 34 are connected with the supporting plate 33, and central limiting holes 34.1 for the cables 100 to pass through are formed in the wedge-shaped blocks 34 and the central line holes 33.1.

A buffer pad 35 is provided between the inner side wall of the limiting aperture 34.1 and the cable 100. Preferably, the cushion 35 is a rubber gasket and the rubber gasket is bonded to the inner side wall of the wedge 34. And the height of the rubber gasket is greater than the depth of the wedge groove 34.2.

Of course, the cushion pad 35 is not limited to the rubber gasket, and may be other material structures, for example: foam plastic, bubble rubber cushion, sponge, etc. The connection between the cushion pad 35 and the wedge block 34 in this structure is not limited to bonding, but may be other types of connection, for example: screw-connected, riveted by a riveting piece, and the like.

In this embodiment, in order to sufficiently secure personal safety of a worker when repairing a cable or each operation switch, the following improved design is made.

As shown in fig. 9, a positioning block 6 is arranged on the door plate 5; the composite switch assembly is also provided with a first limiting mechanism, when the door plate 5 is installed on the cabinet body 1 or separated from the cabinet body 1, the positioning block 6 is matched with or separated from the first limiting mechanism so as to enable the operation part to be communicated with or blocked from the corresponding operation hole 4.1.

As shown in fig. 7, in a state when the door panel 5 is mounted on the cabinet body 1, the positioning block 6 is assembled with the limiting mechanism, at this time, the operation parts of the switches are communicated with the operation holes 4.1, specifically, the mounting holes 24 on the operation parts are also completely exposed from the operation holes 4.1 on the front panel of the housing 4, and at this time, the operation wrench can pass through the operation holes 4.1 to perform the operation of closing or opening.

As shown in fig. 6, when the door panel 5 is separated from the cabinet 1, the positioning block 6 and the limiting mechanism are separated from each other, and the operation portion is blocked from the corresponding operation hole 4.1, that is, the mounting hole 24 on the operation portion is completely blocked by the front panel of the housing 4, and the operation wrench cannot operate the operation portion through the operation hole 4.1. After the arrangement, the door plate 5 and the cabinet body 1 are guaranteed to be installed, and then corresponding switch closing or opening operation can be carried out, so that the safety of operators is fully guaranteed.

In this embodiment, specifically, first stop gear includes limiting plate 7 and gangbar 8, and limiting plate 7 is equipped with an opening along the slidable of vertical direction establishing in casing 4 on the roof of casing 4, and limiting plate 7's upper portion is provided with connecting plate 7.2, and connecting plate 7.1 slidable establishes in the opening from top to bottom, and this limiting plate 7 is laminated mutually with the front panel inside wall of casing 4, can improve limiting plate 7 gliding straightness that hangs down, is difficult to the card.

The limiting plate 7 is provided with a through hole 7.1 corresponding to the operation hole 4.1, and the middle part of the limiting plate 7 is also provided with an avoidance through hole 7.3 for the guide rod 25 to pass through.

The top of casing 4 is equipped with fixing base 9, and gangbar 8 articulates on fixing base 9, and the one end of gangbar 8 articulates with the top of limiting plate 7, and the other end of gangbar 8 is equipped with joins in marriage dress portion 8.1, when door plant 5 installs on cabinet body 1, the lower surface of locating piece 6 cooperatees with the upper surface of joining in marriage dress portion 8.1, thereby gangbar 8 rotates clockwise along the pin joint on fixing base 9 and drives limiting plate 7 and upwards remove to impel through-hole 7.1 on the limiting plate 7 to be linked together with operating hole 4.1, at this moment operating spanner can be connected with the operating portion in the casing 4 through operating hole 4.1, carries out the operation of switch.

When the door plate 5 is separated from the cabinet body 1, the positioning block 6 loses the press fit limit of the linkage rod 8, the limiting plate 7 moves downwards under the action of self gravity, the through holes 7.1 and the operation holes 4.1 are staggered, and are in a blocking and non-communicating state, and at the moment, the operation spanner cannot operate the operation part through the operation holes 4.1.

The articulated department of gangbar 8 and fixing base 9 is equipped with the torsional spring, and the one end that gangbar 8 is close to the portion of joining in marriage dress 8.1 is equipped with spacing support 10, and when locating piece 6 joined in marriage with the portion of joining in marriage dress 8.1, spacing support 10 supports and leans on the upper surface of casing 4.

In order to enable the up-and-down sliding of the limiting plate 7 to be stable, a guide plate 7.4 is arranged at the bottom of the limiting plate 7, a guide through hole is correspondingly formed in the bottom of the shell 4, and the guide plate 7.4 is slidably arranged in the guide through hole.

In addition, as shown in fig. 8, two sides of the limiting block 7 are further provided with limiting sliding bars 7.5 along the vertical direction, two sides of the shell 4 are correspondingly provided with sliding grooves, and two sides of the limiting block 7 are slidably assembled in the sliding grooves through the limiting sliding bars 7.5.

In this embodiment, as shown in fig. 10 and 11, a second limiting mechanism is further disposed in the housing 4, and the second limiting mechanism is connected with an operating portion of the grounding switch, so that when the grounding switch is opened or closed, the first limiting mechanism is driven to perform corresponding movement, thereby locking or unlocking the door panel 5.

Specifically, as shown in fig. 10 and 11, the second limiting mechanism includes two limiting blocks 11, a connecting plate 12 and a pressing rod 13, the two limiting blocks 11 are slidably arranged on the housing 4 along the vertical direction, one ends of the two limiting blocks 11 extend out of the housing 4, the other ends of the two limiting blocks are located in the housing 4, strip-shaped waist-shaped grooves 4.2 are formed in the side walls of the two ends of the housing 4, and the two limiting blocks 11 are slidably arranged in the two corresponding waist-shaped grooves 4.2 respectively.

Two ends of the connecting plate 12 are respectively connected with one end of the two limiting blocks 11, which is positioned in the shell 4, the upper end of the pressing rod 13 is connected with an operating part of the grounding switch, and the lower end of the pressing rod 13 is in sliding abutting contact with the connecting plate 12.

In the embodiment, mounting seats 15 are arranged at two ends of the bottom of the inner cavity of the shell 4, a containing groove 15.1 with an opening at the upper part is arranged on the mounting seats 15, and one end of a limiting block 11 positioned in the shell 4 is slidably arranged in the containing groove 15.1; a spring 16 is arranged in the accommodating groove 15.1, one end of the spring 16 is connected to the bottom of the accommodating groove 15.1, and the other end is connected with the bottom of the limiting block 11.

Preferably, the upper surface of the connecting plate 12 is provided with a downward-bent circular arc-shaped rail 12.1, one end of the pressing rod 13, which is close to the connecting plate 12, is provided with a roller 17, and the roller 17 is slidably assembled in the circular arc-shaped rail 12.1.

The door plate 5 is provided with two limiting seats 14 which are respectively matched with one ends of the limiting blocks 11 extending out of the shell 4.

As shown in fig. 12, in order to make the connection between the limiting block 11 and the limiting seat 14 more convenient and to limit and stabilize, the limiting seat 14 is provided with a fitting groove 14.1, when the door panel 5 and the cabinet 1 are installed, the limiting block 11 is clamped in the fitting groove 14.1, and the fitting groove 14.1 is inclined towards the side far away from the door panel 5. After the arrangement, when the limiting block 11 is matched with the assembling groove 14.1, the door plate 5 is connected with the cabinet body 1 more stably, and the door plate 5 is not easy to slide out along the horizontal direction.

Specifically, as shown in fig. 10, the grounding switch is in a state of opening, at this time, the pressing rod 13 is matched and pressed at the bottommost position of the circular arc-shaped rail 12.1 on the upper surface of the connecting plate 12 along the vertical direction, the connecting plate 12 and the limiting block 11 are pressed downwards together, the spring 16 is in a compressed state, and thus the limiting block 11 is in limiting fit in the matching groove 14.1 on the limiting seat 14, limiting connection between the door plate 5 and the limiting block 11 is realized, and at this time, the door plate 5 cannot be pulled out directly and horizontally, and cannot be separated from the cabinet body 1.

As shown in fig. 11, the grounding switch is in a closing state, and at this time, the stopper 11 rotates by a certain angle, that is, the height of the roller 17 increases, and the downward pressing force of the stopper 11 on the connecting plate 12 decreases. The limiting block 11 is propped against the left side edge of the circular arc-shaped track 12.1 on the upper surface of the connecting plate 12, at this moment, the limiting block 11 moves upwards under the action of the reset elastic force of the spring 16, so that the limiting block 11 is separated from the assembling groove 14.1, and at this time, the door plate 5 can be directly pulled out horizontally without the limiting function of the limiting seat 14, and is separated from the cabinet body 1. In this structure, the ground switch may be turned to the left along the operation hole 4.1, or turned to the right, and the structure of the left turning switch is shown in fig. 10, and the structure of the right turning switch is not shown in the diagram.

In this embodiment, the detachable door panel 5 provided on the front side of the cabinet body 1 means that a plurality of fixing plates 18 are provided on two upright posts 1.1 on the front side of the cabinet body 1 along the vertical direction, a plurality of insertion holes 5.2 are correspondingly provided on two side edges of the door panel 5 and are correspondingly assembled with the fixing plates 18, and each insertion hole 5.2 is correspondingly assembled on the plurality of fixing plates 18 when the door panel 5 is installed.

Of course, the mounting manner of the door panel 5 and the cabinet 1 is not limited to the above-described insertion, and may be a bolt-on type.

As shown in fig. 17, a limiting part 18.1 is arranged at the upper part of the fixed plate 18, and a movable gap D is reserved between the top of the door plate 5 and the preassembled part on the cabinet body 1, so that when the door plate 5 is connected with the cabinet body 1 in an inserting way, firstly, the door plate 5 is lifted a certain distance, then, the jack 5.2 on the door plate 5 corresponds to the position of the fixed plate 18 on the cabinet body 1, the door plate 5 is pushed horizontally towards the inner cavity of the cabinet body 1, and finally, the door plate 5 is pushed downwards, so that the limiting part 18.1 is clamped in the jack 5.2 of the door plate 5, and thus, the door plate 5 cannot be pulled out along the horizontal direction. If the door plate 5 needs to be disassembled, the door plate 5 can be pulled out along the horizontal direction only by lifting the door plate 5 upwards for a certain distance, and when the limiting part 18.1 loses the limiting clamp of the door plate 5. After the arrangement, the whole structure is stable, and the door plate 5 and the cabinet body 1 cannot be separated easily.

Specifically, a plurality of assembling holes 1.1.1 are uniformly formed in the two upright posts 1.1 on the front side of the cabinet body 1 along the vertical direction, and the fixing plate 18 is inserted into the corresponding assembling holes 1.1.1; the lower extreme of fixed plate 18 is equipped with spacing groove 18.2, when fixed plate 18 and the stand 1.1 of cabinet body 1 are joined in marriage the dress, first insert the one end cartridge of fixed plate 18 and stretch into jack 5.2, then with the spacing groove 18.2 on the fixed plate 18 from top to bottom block on stand 1.1.

In addition, arc-shaped protrusions 18.3 are further arranged on two sides of the limiting groove 18.2 respectively, and the arc-shaped protrusions 18.3 on two sides are located at the upper end and the lower end of the limiting groove 18.2 respectively, so that the fixing plate 18 is more stable when being clamped on the upright post 1.1 through the limiting groove 18.2.

As shown in fig. 14, in order to make the door panel 5 more smooth in overall appearance and more stable in structure after being assembled with the cabinet body 1, a vertical slot 19 is provided at the bottom of the front side of the cabinet body 1, a limit cross bar 20 is provided at the position of the front side of the cabinet body 1 corresponding to the upper portion of the door panel 5, and a limit groove 20.1 is provided on the upper surface of the limit cross bar 20.

As shown in fig. 13, 15 and 16, correspondingly, an L-shaped plugboard 21 is arranged at the bottom of the door plate 5, a horizontal limiting plate 22 is arranged at the upper part of the door plate 5, a limiting protrusion 22.1 is arranged on the lower surface of the horizontal limiting plate 22, and side plugboards 23 are also arranged on two sides of the door plate 5.

When the door plate 5 is installed with the cabinet body 1, firstly, the vertical section of the L-shaped plug 21 is inserted into the vertical slot 19, after each jack 5.2 on the door plate 5 is aligned with the fixing plate 18 on the cabinet body 1, the door plate 5 is horizontally pushed towards the rear of the cabinet body 1, so that each fixing plate 18 is assembled with each jack 5.2, at the moment, the side plug plates 23 on two sides of the door plate 5 are assembled between the two upright posts 1.1 on the front side of the cabinet body 1 in a fitting way, then the whole door plate 5 is pushed downwards, so that the limit protrusions 22.1 are just inserted into the limit grooves 20.1 on the limit cross bars 20, and the whole process assembly of the door plate 5 is completed.

The foregoing description of the preferred embodiments of the present invention is provided for illustration and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to be changed, and all changes made within the scope of the invention as independently claimed are within the scope of the invention.

Claims (3)

1. The utility model provides a looped netowrk switch cabinet, includes the cabinet body (1), the cabinet body in install vacuum circuit breaker (2) and compound switch module (3), just operating device of vacuum circuit breaker (2) and the operating device of compound switch module (3) interlock mutually, compound switch module (3) include casing (4), isolator and earthing switch install respectively in casing (4), just compound switch module (3) on be equipped with two operating units that are used for controlling isolator and earthing switch to close or break respectively, be equipped with on casing (4) with operation hole (4.1) that two operating units correspond, its characterized in that: the front side of the cabinet body (1) is detachably provided with a door plate (5), the door plate (5) is provided with a window (5.1), and the front panel of the shell (4) is exposed out of the window (5.1); the door plate (5) is provided with a positioning block (6); the composite switch assembly is also provided with a first limiting mechanism, and when the door plate (5) is installed on the cabinet body (1) or separated from the cabinet body (1), the positioning block (6) is matched with or separated from the first limiting mechanism so as to enable the operation part to be communicated or blocked with the corresponding operation hole (4.1); the shell (4) is internally provided with a second limiting mechanism which is connected with an operating part of the grounding switch, and when the grounding switch is switched off or on, the second limiting mechanism is driven to correspondingly move so as to lock or unlock the door plate (5);

a wire inlet hole (26) is formed in a bottom plate of the cabinet body (1), a box body (27) is arranged above the wire inlet hole (26) in the bottom plate, a through hole (27.1) for a cable (100) to pass through is formed in the box body (27), a sealing layer (28) is arranged around the cable (100) in an inner cavity of the box body (27), a blocking gasket (29) is arranged between the bottom of the sealing layer (28) and the upper surface of the bottom plate, and the blocking gasket (29) is sealed and arranged outside the cable (100); the side wall of the box body (27) is provided with at least one injection hole (27.2) for injecting foaming agent; the top of the box body (27) is provided with a fixed sleeve (30), a plurality of limiting elastic pieces (31) are circumferentially arranged in the fixed sleeve (30), the limiting elastic pieces (31) are uniformly arranged between the cable (100) and the fixed sleeve (30) along the circumferential direction, one end of each limiting elastic piece (31) is connected with the fixed sleeve (30), and the other end of each limiting elastic piece is in limiting abutting against the side wall of the cable (100); a clamping mechanism for radially limiting the cable (100) is arranged at the position, close to the wire inlet hole (26), below the bottom plate;

the first limiting mechanism comprises a limiting plate (7) and a linkage rod (8), wherein the limiting plate (7) is slidably arranged in the shell (4) along the vertical direction, and a through hole (7.1) corresponding to the operation hole (4.1) is formed in the limiting plate (7); the top of the shell (4) is provided with a fixed seat (9), the linkage rod (8) is hinged on the fixed seat (9), one end part of the linkage rod (8) is hinged with the top of the limiting plate (7), the other end of the linkage rod (8) is provided with a fitting part (8.1), when the door plate (5) is installed on the cabinet body (1), the lower surface of the positioning block (6) is matched with the upper surface of the fitting part (8.1), the linkage rod (8) rotates along a hinge point on the fixed seat (9) so as to drive the limiting plate (7) to move upwards, and a through hole (7.1) on the limiting plate (7) is communicated with the operation hole (4.1); when the door plate (5) is separated from the cabinet body (1), the assembling part (8.1) is separated from the positioning block (6), the limiting plate (7) moves downwards under the action of self gravity, and the through hole (7.1) is blocked from the operation hole (4.1); the second limiting mechanism comprises two limiting blocks (11), a connecting plate (12) and a pressing rod (13), wherein the two limiting blocks (11) are slidably arranged on the shell (4) along the vertical direction, one end of each limiting block (11) extends out of the shell (4), and the other end of each limiting block is positioned in the shell (4); two ends of the connecting plate (12) are respectively connected with one ends of the two limiting blocks (11) which are positioned in the shell (4), the upper end of the pressing rod (13) is connected with an operating part of the grounding switch, and the lower end of the pressing rod (13) is in sliding abutting contact with the connecting plate (12); two limit seats (14) which are respectively matched with one ends of the limit blocks (11) extending out of the shell (4) are arranged on the door plate (5), a matching groove (14.1) is arranged on the limit seat (14), and the matching groove (14.1) inclines towards one side far away from the door plate (5); when the grounding switch is switched on or off, the lower end of the pressing rod (13) slides on the connecting plate (12) and is used for controlling the limiting block (11) to move upwards or downwards so that the limiting block (11) is separated from or matched with the assembling groove (14.1);

both ends of the bottom of the inner cavity of the shell (4) are provided with mounting seats (15), each mounting seat (15) is provided with a containing groove (15.1) with an opening at the upper part, and one end of each limiting block (11) positioned in the shell (4) is slidably arranged in each containing groove (15.1); a spring (16) is arranged in the accommodating groove (15.1), one end of the spring (16) is connected to the bottom of the accommodating groove (15.1), and the other end of the spring is connected with the bottom of the limiting block (11); the upper surface of connecting plate (12) is equipped with arc track (12.1) crooked downwards, and the one end that supports depression bar (13) and be close to connecting plate (12) is equipped with gyro wheel (17), gyro wheel (17) sliding fit in arc track (12.1).

2. A ring main unit as claimed in claim 1, wherein: the limiting elastic piece (31) is an L-shaped elastic piece, a limiting step (30.1) is arranged at the top of the fixed sleeve (30), the end part of the horizontal section of the limiting elastic piece (31) is propped against the limiting step (30.1), and the vertical section of the limiting elastic piece (31) is propped against the outer side wall of the cable (100); a plurality of fixing bolts (32) are uniformly arranged on the side wall of the fixing sleeve (30) along the circumferential direction, and the end parts of the fixing bolts (32) correspondingly lean against the vertical sections of the limiting elastic pieces (31).

3. A ring main unit according to claim 1 or 2, characterized in that: the clamping mechanism comprises a supporting plate (33), the supporting plate (33) is connected to the lower surface of the bottom plate, a central line hole (33.1) is formed in the supporting plate (33), a wedge-shaped groove (33.2) is formed in the lower end of the supporting plate (33) and coaxial with the central line hole (33.1), a wedge-shaped block (34) matched with the wedge-shaped angle of the wedge-shaped groove is assembled in the wedge-shaped groove (33.2), the wedge-shaped block (34) is connected with the supporting plate (33), and a central limiting hole (34.1) for a cable (100) to pass through is formed in the wedge-shaped block (34) and coaxial with the central line hole (33.1).