CN216390065U - Ring main unit - Google Patents

Abstract

The utility model provides a ring main unit, comprising: the cabinet body is used for being mounted on the supporting base surface; the incoming busbar is arranged in the cabinet body; the three groups of outgoing line cables are arranged in the cabinet body and are used for being connected with three external load circuits in a one-to-one correspondence manner; the load switches are positioned in the cabinet body and are sequentially arranged at intervals along the direction vertical to the supporting base surface; each load switch is used for connecting one or two of the incoming busbar and the three outgoing cable groups so as to control the on-off of one or two of the three load circuits, and solve the problem that only one load switch is arranged in the insulating ring main unit in the prior art, and when the load switch breaks down, the connected load connected with the insulating ring main unit can be powered off.

Description

Ring main unit

Technical Field

The utility model relates to the technical field of power distribution cabinets, in particular to a ring main unit.

Background

The medium-voltage air insulation ring main unit is the preferred power distribution equipment for user engineering projects such as box transformers, switching stations, residential quarters and the like due to simple wiring, low manufacturing cost and small occupied area.

In the prior art, a medium-pressure air insulation ring main unit is fixedly arranged in a distribution room and consists of a shell, an incoming busbar, a three-phase common-box epoxy resin air bag type load switch and an outgoing busbar, and only one load switch can be arranged in one ring main unit; the three-phase common-box epoxy resin air bag type load switch is fixed in the cabinet body through a mounting hole at the rear part of an air bag and a hole on a mounting plate of a front mechanism box, and A, B of the three-phase common-box epoxy resin air bag type load switch and a wiring support of a C three-phase winding of the three-phase common-box epoxy resin air bag type load switch are vertical to the ground and are sequentially arranged according to the back, the middle and the front; the ring main unit is provided with an interlocking device which moves through a mechanism in the vertical direction to be associated with the closed state or the open state of the lower door of the ring main unit so as to prevent misoperation.

The insulating ring main unit in the prior art has the following defects:

(1) the utility ratio of power supply is lower, because only can be equipped with a load switch in a looped netowrk cabinet, if this load switch breaks down, the load that whole circuit was taken will all have a power failure.

(2) The cabinet body does not have damping device, can only fixed mounting in the distribution room, is unfavorable for the transportation of vehicle and is not suitable for the power supply to portable load.

In this regard, a vehicle-mounted power distribution cabinet with a damping device has been proposed, but the damping structure is excessively complicated, the manufacturing cost is high, and the composition structure of the power distribution cabinet is not specifically described.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a ring main unit, which aims to solve the problem that when only one load switch is arranged in an insulated ring main unit in the prior art and the load switch breaks down, the loads connected with the insulated ring main unit are powered off.

In order to achieve the above object, according to one aspect of the present invention, there is provided a ring main unit including: the cabinet body is used for being mounted on the supporting base surface; the incoming busbar is arranged in the cabinet body; the three groups of outgoing line cables are arranged in the cabinet body and are used for being connected with three external load circuits in a one-to-one correspondence manner; the load switches are positioned in the cabinet body and are sequentially arranged at intervals along the direction vertical to the supporting base surface; each load switch is used for connecting the incoming busbar with one or two of the three groups of outgoing cables so as to control the on-off of one or two of the three load circuits.

Furthermore, the number of the load switches is two, one load switch is used for controlling the on-off of one of the three load circuits, and the other load switch is used for controlling the on-off of the other two of the three load circuits; or the number of the load switches is three, the three load switches are arranged in one-to-one correspondence with the three load circuits, and each load switch is respectively used for controlling the on-off of the corresponding load circuit; and/or the load switch comprises an air bag and a mechanism box, wherein a wiring support used for wiring is arranged on the air bag, and the wiring support extends along the direction parallel to the supporting base plane of the ring main unit so as to be connected with an outgoing cable or an incoming busbar.

Furthermore, a guide component is installed in the cabinet body, and at least part of the guide component is located below the load switch so as to play a role in guiding and supporting the installation of the load switch.

Furthermore, the number of the guide components is multiple, and the plurality of guide components and the plurality of load switches are arranged in a one-to-one correspondence manner so as to respectively play a role in guiding and supporting the installation of the corresponding load switches.

Further, the guide part comprises an upper guide rail and a lower guide rail which are respectively positioned above and below the load switch, the upper guide rail and the lower guide rail form a guide space, and the load switch is positioned in the guide space so as to play a role of guiding and supporting the installation of the load switch through the guide part.

Further, in a guide part, the number of the upper guide rails and/or the lower guide rails is multiple, and the plurality of upper guide rails and/or the plurality of lower guide rails are arranged at intervals along the horizontal direction so as to jointly play a role of guiding and supporting the installation of the load switch.

Furthermore, the upper guide rail and/or the lower guide rail are/is provided with a guide groove, and a part of the load switch is positioned in the guide groove to slide along the guide groove, so that the guide groove can play a role in guiding and limiting the installation of the load switch.

Further, the looped netowrk cabinet includes damping device, and damping device is located the cabinet body and supports between the base face to play the absorbing effect of buffering to the cabinet body.

Further, the shock-absorbing device includes: the bottom plate is used for being placed on a supporting base surface of the ring main unit; and the damping component is positioned between the cabinet body and the bottom plate so as to play a role of buffering and damping for the cabinet body.

Furthermore, the bottom plate is provided with a mounting groove for mounting the damping component, one part of the damping component is positioned in the mounting groove, and the other part of the damping component extends out towards the cabinet body so as to be abutted against the cabinet body; and/or the cabinet body is connected with the damping component through a fastening piece, a first through hole for the fastening piece to pass through is arranged on the cabinet body, a second through hole for the fastening piece to pass through is arranged on the damping component, a fastening hole for the fastening piece to insert into is arranged on the bottom plate, and one end of the fastening piece is inserted into the fastening hole after passing through the first through hole and the second through hole so as to fixedly connect the cabinet body, the damping component and the bottom plate; and/or the damping component is made of rubber.

Further, shock-absorbing component includes the heelpiece and sets up the contact arch on the heelpiece, and the heelpiece is used for with the bottom plate butt, and the contact arch is located one side that the heelpiece is close to the cabinet body to be used for with the cabinet body butt.

Further, the contact protrusion is annular or hemispherical; and/or the number of the contact bulges is a plurality of, and any two of the contact bulges are arranged at intervals to be abutted against the cabinet body together.

Further, the ring main unit includes: the partition board is arranged in the cabinet body and used for partitioning the interior of the cabinet body into a plurality of chambers which are sequentially arranged in the direction perpendicular to the supporting base surface, the chambers and the load switches are arranged in a one-to-one correspondence mode, and the load switches are respectively located in the corresponding chambers.

Further, be provided with the opening on the cabinet body, the looped netowrk cabinet includes: a cabinet door provided at the opening portion, the cabinet door being movably mounted on the cabinet body to open or close the opening portion; the interlocking device is arranged on one side of the cabinet door close to the inside of the cabinet body, the interlocking device has a locking state for locking the cabinet door and an unlocking state for unlocking the cabinet door so as to open the cabinet door, and at least part of the interlocking device is movably arranged along the horizontal direction to switch between the locking state and the unlocking state.

Further, the interlock device includes: one of the fixed part and the moving part is arranged on the cabinet door and is positioned at one side of the cabinet door close to the interior of the cabinet body, and the other of the fixed part and the moving part is arranged on the load switch; the driving part is in driving connection with the moving part, and at least part of the moving part is movably arranged along the horizontal direction; so that the fixed part and the moving part are connected or separated through the movement of the moving part, and the interlocking device is switched between a locking state and an unlocking state.

Further, an insertion hole is formed in one of the fixed portion and the moving portion, and an insertion rod which is in insertion fit with the insertion hole is formed in the other of the fixed portion and the moving portion, so that the insertion rod is inserted into or separated from the insertion hole by driving of the driving portion.

Further, the inserted link is provided on the moving portion, and the moving portion and the driving portion are provided on the load switch, and the moving portion further includes: the end, far away from the crank, of the sliding block is connected with the inserting rod so as to drive the sliding block to horizontally move through the rotation of the crank, and the inserting rod is inserted into or separated from the inserting hole; or a gear and a rack which are meshed with each other, wherein the rack is connected with the insertion rod so as to drive the rack to horizontally move through the rotation of the gear, so that the insertion rod is inserted into or separated from the insertion hole.

By applying the technical scheme of the utility model, the ring main unit is a vehicle-mounted combined type miniaturized air-insulated power distribution cabinet, belongs to the technical field of medium-voltage power distribution switchgear and comprises: the intelligent cabinet comprises a cabinet body, a wire inlet busbar, three groups of wire outlet cables and a plurality of load switches, wherein the cabinet body is arranged on a support base surface; the incoming busbar is arranged in the cabinet body; the three groups of outgoing cables are arranged in the cabinet body and are respectively used for being connected with three external load circuits in a one-to-one correspondence manner; the load switches are all located in the cabinet body and are sequentially arranged at intervals in the direction perpendicular to the supporting base surface, and each load switch is used for connecting the incoming busbar with one or two of the three groups of outgoing cables so as to control the on-off of one or two of the three load circuits. Like this, a looped netowrk cabinet has realized supplying power for three load circuit and two at least load circuit carry out control protection's purpose through the switch of difference respectively, has solved only be equipped with a load switch in the insulating looped netowrk cabinet among the prior art, and when this load switch broke down, the problem that the load that is connected that insulating looped netowrk cabinet connected all can have a power failure has improved the power supply efficiency of looped netowrk cabinet.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

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

fig. 2 shows a line connection diagram of the ring main unit shown in fig. 1;

fig. 3 shows an internal side view of the ring main unit shown in fig. 1;

fig. 4 shows a partial enlarged view of the ring main unit shown in fig. 1 at a;

fig. 5 shows a cross-sectional view of the ring main unit shown in fig. 1 along the direction B-B;

fig. 6 shows a partial enlarged view of the ring main unit shown in fig. 5 at D;

fig. 7 shows a partial enlarged view of the ring main unit shown in fig. 1 at C;

fig. 8 shows a half sectional view of a shock-absorbing member of the ring main unit shown in fig. 1;

fig. 9 is a schematic structural view showing a moving part of the interlocking device of the ring main unit shown in fig. 1;

fig. 10 is a schematic structural diagram of a load switch of the ring main unit shown in fig. 1;

fig. 11 shows a side view of the load switch of the ring main unit shown in fig. 10; and

fig. 12 shows a front view of the ring main unit shown in fig. 1.

Wherein the figures include the following reference numerals:

1. a cabinet body; 11. a first through hole; 2. an outgoing cable; 3. a load switch; 31. air bags; 311. a gas bag main body; 312. the edge of the air bag; 313. a wiring support; 314. a first connection hole; 32. a mechanism box; 321. mounting a plate; 322. an operation panel; 323. a second connection hole; 4. a damping device; 41. a base plate; 411. mounting grooves; 42. a shock-absorbing member; 421. a bottom pad; 422. a contact projection; 423. a second through hole; 43. a fastener; 5. a guide member; 50. a sliding friction pair; 51. an upper guide rail; 52. a lower guide rail; 6. the incoming line busbar; 7. a chamber; 8. a cabinet door; 9. an interlock device; 91. a fixed part; 92. a moving part; 921. a crank; 922. a slider; 923. an insertion rod; 10. a separator.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 to 12, the present invention provides a ring main unit, including: the cabinet body 1 is used for being mounted on a supporting base surface; the incoming busbar 6 is arranged in the cabinet body 1; the three groups of outgoing cables 2 are arranged in the cabinet body 1, and the three groups of outgoing cables 2 are used for being connected with three external load circuits in a one-to-one correspondence manner; the load switches 3 are positioned in the cabinet body 1 and are sequentially arranged at intervals along a direction vertical to the supporting base plane; each load switch 3 is used for connecting the incoming busbar 6 with one or two of the three groups of outgoing cables 2, so as to control the on-off of one or two of the three load circuits.

The utility model discloses a ring main unit which is a vehicle-mounted combined type miniaturized air insulation power distribution cabinet, belongs to the technical field of medium-voltage power distribution switch equipment, and comprises: the intelligent cabinet comprises a cabinet body 1, a wire inlet busbar 6, three groups of wire outlet cables 2 and a plurality of load switches 3, wherein the cabinet body 1 is used for being mounted on a supporting base surface; the incoming busbar 6 is arranged in the cabinet body 1; the three groups of outgoing cables 2 are arranged in the cabinet body 1, and the three groups of outgoing cables 2 are respectively used for being connected with three external load circuits in a one-to-one correspondence manner; the load switches 3 are all located in the cabinet body 1 and are sequentially arranged at intervals in the direction perpendicular to the supporting base surface, and each load switch 3 is used for connecting the incoming busbar 6 with one or two of the three groups of outgoing cables 2 so as to control the on-off of one or two of the three load circuits. Like this, a looped netowrk cabinet has realized supplying power for three load circuit and two at least load circuit carry out control protection's purpose through the switch of difference respectively, has solved only be equipped with a load switch in the insulating looped netowrk cabinet among the prior art, and when this load switch broke down, the problem that the load that is connected that insulating looped netowrk cabinet connected all can have a power failure has improved the power supply efficiency of looped netowrk cabinet.

Specifically, the incoming busbar 6 is a copper bar with a rectangular cross section, and the outgoing cable 2 is a common single-core cylindrical high-voltage cable.

Optionally, the number of the load switches 3 is two, one load switch 3 is used for controlling the on/off of one of the three load circuits, and the other load switch 3 is used for controlling the on/off of the other two of the three load circuits; or the number of the load switches 3 is three, the three load switches 3 are arranged in one-to-one correspondence with the three load circuits, and each load switch 3 is used for controlling the on-off of the corresponding load circuit.

As shown in fig. 10 and 11, the load switch 3 includes an air bag 31 and a mechanism box 32, wherein a wiring support 313 for wiring with the outside is disposed on the air bag 31, and the wiring support 313 extends in a direction parallel to a supporting base plane of the ring main unit for connecting with the outgoing cable 2 or the incoming busbar 6.

Specifically, the air bag 31 comprises an air bag main body 311 and an air bag edge 312 arranged around the air bag main body 311, a first connecting hole 314 is arranged on the air bag edge 312, both sides of the air bag main body 311 are provided with wiring supports 313, the mechanism box 32 is connected with the air bag 31 through a mounting plate 321, and the mounting plate 321 is provided with a second connecting hole 323; the mechanism box 32 comprises an operation panel 322 at the side far away from the air bag 31, and the operation panel 322 is positioned at the side of the load switch 3 close to the cabinet door 8, so that the load switch 3 can be operated through the operation panel 322.

The load switch 3 of the present invention is a three-phase common-box epoxy resin air-bag type load switch, three wiring supports 313 are provided on opposite sides of an air-bag main body 311 of an air bag 31 of the load switch 3 to respectively correspond to three-phase load lines, the three wiring supports 313 are sequentially arranged in a direction parallel to a supporting base plane, and when the load switch 3 is operated with electricity, current flows in from a wiring on one side of the air bag 31 and flows out from a wiring on the other side of the air bag 31.

Wherein, the two ends of the load switch 3 are respectively installed on the cabinet body 1 through fasteners penetrating through the first connecting hole 314 and the second connecting hole 323. After the load switch 3 is fixed, the incoming busbar 6 is connected to the wiring support 313 on one side of the load switch 3, and the outgoing cable 2 is connected to the wiring support 313 on the other side of the load switch 3, so that the incoming busbar 6, the load switch and the outgoing cable 2 jointly form a complete power supply circuit.

Because the power distribution cabinet needs to be transported by a vehicle, and the height of the ring main unit of the vehicle-mounted equipment has limited height requirements, in order to ensure that the maximum height of the appearance of the three load switches 3 does not exceed a set size (namely 2200mm) after the three load switches are installed in one ring main unit, the gas bag is installed by rotating 90 degrees laterally, even if the extending direction of each wiring support 313 is parallel to the supporting base surface for wiring.

As shown in fig. 1, a guiding member 5 is installed in the cabinet 1, and at least a part of the guiding member 5 is located below the load switch 3 to provide guiding support for the installation of the load switch 3.

The number of the guide members 5 is plural, and the plurality of guide members 5 are provided in one-to-one correspondence with the plurality of load switches 3 to respectively play a role of guiding and supporting the installation of the corresponding load switches 3.

Specifically, the guide member 5 includes a lower rail 52 located below the load switch 3 for supporting the load switch 3.

As shown in fig. 3, the guide member 5 includes an upper guide rail 51 and a lower guide rail 52 respectively located above and below the load switch 3, and the upper guide rail 51 and the lower guide rail 52 together form a guide space in which the load switch 3 is located to serve as a guide support for installation of the load switch 3 by the guide member 5.

As shown in fig. 4, the upper guide rail 51 and the lower guide rail 52 are formed by bending a metal plate, the upper guide rail 51 and the lower guide rail 52 both include a support plate body used for contacting the load switch 3 and two connection plate bodies respectively symmetrically arranged on opposite sides of the support plate body, each connection plate body includes a third plate body and a fourth plate body which are perpendicular to each other, the third plate body is perpendicularly connected with the support plate body, the fourth plate body is located on one side of the third plate body far away from the support plate body so as to be connected with the cabinet body 1, and any one of the two relatively-arranged fourth plate bodies of one guide rail extends towards a direction far away from another relative fourth plate body.

Thus, when the load switch 3 is installed, the bottom end face of the air bag 31 of the load switch 3 is erected above the lower guide rail 52, the top end face of the air bag 31 of the load switch 3 is erected below the upper guide rail 51, so that the sliding friction pairs 50 are formed between the air bag 31 of the load switch 3 and the upper surface of the lower guide rail 52 and between the air bag 31 of the load switch 3 and the lower surface of the upper guide rail 51, and then the load switch 3 is pushed into the cabinet 1 along the direction parallel to the supporting base surface, so that the load switch 3 is assembled and disassembled more easily, and the labor intensity of workers is reduced.

Preferably, in one guide member 5, the number of the upper guide rails 51 and/or the lower guide rails 52 is plural, and the plural upper guide rails 51 and/or the plural lower guide rails 52 are arranged at intervals in the horizontal direction to collectively function as a guide support for the installation of the load switch 3.

It is further preferable that the upper rail 51 and/or the lower rail 52 is provided with a guide groove, and a part of the load switch 3 is located in the guide groove to slide along the guide groove, so as to play a guiding and limiting role for the installation of the load switch 3 through the guide groove, so as to prevent the load switch 3 from slipping off the upper rail 51 and/or the lower rail 52.

As shown in fig. 1, in order to fixedly mount the ring main unit of the present invention in a compartment of a vehicle for transportation and to reduce vibration damage to the ring main unit caused by bumping during vehicle-mounted transportation, a damping device 4 is disposed between the main unit 1 of the ring main unit and a supporting base surface of the ring main unit to buffer and damp the main unit 1, wherein the supporting base surface is a bottom of the compartment.

As shown in fig. 7, the damper device 4 includes: the bottom plate 41 is used for being placed on a supporting base surface of the ring main unit; and the shock absorption part 42 is positioned between the cabinet body 1 and the bottom plate 41, so that the cabinet body 1 is cushioned and damped.

Wherein, the bottom plate 41 is provided with a mounting groove 411 for mounting the damping component 42, one part of the damping component 42 is positioned in the mounting groove 411, and the other part of the damping component 42 extends towards the cabinet 1 for abutting against the cabinet 1; and/or the cabinet body 1 is connected with the damping part 42 through a fastening part 43, a first through hole 11 for the fastening part 43 to pass through is arranged on the cabinet body, a second through hole 423 for the fastening part 43 to pass through is arranged on the damping part 42, a fastening hole for the fastening part 43 to insert is arranged on the bottom plate 41, and one end of the fastening part 43 passes through the first through hole 11 and the second through hole 423 and then is inserted into the fastening hole so as to fixedly connect the cabinet body 1, the damping part 42 and the bottom plate 41; and/or the shock absorbing member 42 is made of rubber.

Specifically, the fastening member 43 is a screw, the fastening hole is a threaded hole for screwing the fastening member 43, and one end of the fastening member 43 is screwed into the fastening hole after passing through the first through hole 11 and the second through hole 423.

As shown in fig. 8, the shock absorbing member 42 includes a bottom pad 421 and a contact protrusion 422 disposed on the bottom pad 421, the bottom pad 421 is used for abutting against the bottom plate 41, and the contact protrusion 422 is located on one side of the bottom pad 421 close to the cabinet 1, so as to abut against the cabinet 1.

Optionally, the contact bumps 422 are annular or hemispherical; and/or the number of the contact projections 422 is plural, and any two of the plural contact projections 422 are arranged at intervals to be abutted against the cabinet 1 in common.

In the embodiment of the present invention shown in fig. 7 and 8, the bottom pad 421 is a circular ring having a second through hole 423, the contact protrusion 422 is an annular protrusion disposed on the circular ring, the cross section of the contact protrusion 422 is a semicircular cross section, the outer diameter of the annular protrusion is smaller than the outer diameter of the bottom pad 421, and the inner diameter of the annular protrusion is larger than the inner diameter of the second through hole 423 and larger than the inner diameter of the first through hole, so that the contact protrusion 422 is always in contact with the cabinet 1 to absorb shock and damp the cabinet 1.

As shown in fig. 3, the ring main unit includes: the cabinet comprises a partition plate 10, the partition plate 10 is arranged in the cabinet body 1 and used for dividing the interior of the cabinet body 1 into a plurality of chambers 7 which are sequentially arranged along the direction vertical to the supporting base plane, the plurality of chambers 7 are arranged in one-to-one correspondence with the plurality of load switches 3, and the load switches 3 are respectively positioned in the corresponding chambers 7.

Specifically, the cabinet body 1 of looped netowrk cabinet is closed cuboid structure, is provided with the installation roof beam in it to be used for installing load switch 3, and cabinet body 1 is interior to have two baffles 10 along the direction interval arrangement of perpendicular to support base face, in order to divide into upper, middle, lower three cavity 7 with cabinet body 1 is inside to separate, and three load switch 3 is installed respectively in three cavity 7, and three guide part 5 is also installed respectively in three cavity 7 to the installation to corresponding load switch 3 carries out the direction support.

As shown in fig. 5 and 6, the cabinet body 1 is provided with an opening portion, and the ring main unit includes: a cabinet door 8, the cabinet door 8 being disposed at the opening portion, the cabinet door 8 being movably mounted on the cabinet body 1 to open or close the opening portion; the interlocking device 9 is arranged on one side, close to the inside of the cabinet body 1, of the cabinet door 8, the interlocking device 9 has a locking state for locking the cabinet door 8 and an unlocking state for unlocking the cabinet door 8 so as to open the cabinet door 8, and at least part of the interlocking device 9 is movably arranged in the horizontal direction to switch between the locking state and the unlocking state so as to ensure the safety of electricity utilization and operation maintenance.

Wherein, interlock 9 includes: the fixed part 91 and the moving part 92, one of the fixed part 91 and the moving part 92 is arranged on the cabinet door 8 and is positioned on one side of the cabinet door 8 close to the inside of the cabinet body 1, and the other one of the fixed part 91 and the moving part 92 is arranged on the load switch 3; a driving part which is connected with the moving part 92 in a driving way, and at least part of the moving part 92 is movably arranged along the horizontal direction; so that the moving portion 92 is driven to move by the driving portion to connect or disconnect the fixed portion 91 and the moving portion 92, thereby switching the interlock device 9 between the locked state and the unlocked state.

Specifically, one of the fixed portion 91 and the moving portion 92 is provided with an insertion hole, and the other of the fixed portion 91 and the moving portion 92 is provided with an insertion rod 923 in insertion fit with the insertion hole, so that the insertion rod 923 is inserted into or separated from the insertion hole by the driving of the driving portion, so as to switch the interlocking device 9 between the locked state and the unlocked state.

In the embodiment shown in fig. 9 of the present invention, the fixing portion 91 is an L-shaped bracket, and includes a first plate and a second plate perpendicular to each other, the first plate is fixed on the cabinet door 8, and the second plate is provided with an insertion hole; the moving portion 92 and the driving portion are provided on the load switch 3, and the moving portion 92 includes an insertion rod 923 fitted in the insertion hole.

When the interlocking device is in a locking state, the insertion rod 923 horizontally moves leftwards to be inserted into the insertion hole, so that the cabinet door 8 cannot be opened; when the interlock is in the unlock state, the insertion rod 923 is horizontally retracted rightward and pulled out from the insertion hole, so that the cabinet door 8 can be opened, thereby preventing a malfunction.

As shown in fig. 12, the operation knob on the operation panel 322 of the load switch 3 is connected to the drive portion of the interlock device so that the interlock device 9 is switched between the locked state and the unlocked state by rotating the operation knob, and the cabinet door 8 is provided with a window corresponding to the operation panel 322 so that the operation panel 322 is manually operated.

In the embodiment shown in fig. 9 and 10, the insertion rod 923 is provided on the moving portion 92, the moving portion 92 and the driving portion are provided on the load switch 3, and the moving portion 92 further includes: the driving part is in driving connection with the crank 921, one end, far away from the crank 921, of the slider 922 is connected with the insertion rod 923, so that the slider 922 is driven to horizontally move through rotation of the crank 921, and the insertion rod 923 is inserted into or separated from the insertion hole; alternatively, in another embodiment of the present invention, the insertion rod 923 is provided on the moving portion 92, the moving portion 92 and the driving portion are provided on the load switch 3, and the moving portion 92 further includes: the driving part is in driving connection with the gear, and the rack is connected with the insertion rod 923 so as to drive the rack to move horizontally through the rotation of the gear, so that the insertion rod 923 is inserted into or separated from the insertion hole.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

the utility model discloses a ring main unit which is a vehicle-mounted combined type miniaturized air insulation power distribution cabinet, belongs to the technical field of medium-voltage power distribution switch equipment, and comprises: the intelligent cabinet comprises a cabinet body 1, a wire inlet busbar 6, three groups of wire outlet cables 2 and a plurality of load switches 3, wherein the cabinet body 1 is used for being mounted on a supporting base surface; the incoming busbar 6 is arranged in the cabinet body 1; the three groups of outgoing cables 2 are arranged in the cabinet body 1, and the three groups of outgoing cables 2 are respectively used for being connected with three external load circuits in a one-to-one correspondence manner; the load switches 3 are all located in the cabinet body 1 and are sequentially arranged at intervals in the direction perpendicular to the supporting base surface, and each load switch 3 is used for connecting the incoming busbar 6 with one or two of the three groups of outgoing cables 2 so as to control the on-off of one or two of the three load circuits. Like this, a looped netowrk cabinet has realized supplying power for three load circuit and two at least load circuit carry out control protection's purpose through the switch of difference respectively, has solved only be equipped with a load switch in the insulating looped netowrk cabinet among the prior art, and when this load switch broke down, the problem that the load that is connected that insulating looped netowrk cabinet connected all can have a power failure has improved the power supply efficiency of looped netowrk cabinet.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (17)

1. A ring main unit, comprising:

a cabinet body (1) for mounting on a support base;

the incoming line busbar (6) is arranged in the cabinet body (1);

the three groups of outgoing line cables (2) are arranged in the cabinet body (1), and the three groups of outgoing line cables (2) are used for being connected with three external load circuits in a one-to-one correspondence manner;

the load switches (3) are positioned in the cabinet body (1) and are sequentially arranged at intervals along the direction vertical to the supporting base plane; each load switch (3) is used for connecting the incoming busbar (6) with one or two of the three groups of outgoing cables (2) so as to control the on-off of one or two of the three load circuits.

2. The ring main unit according to claim 1,

the number of the load switches (3) is two, one load switch (3) is used for controlling the on-off of one of the three load circuits, and the other load switch (3) is used for controlling the on-off of the other two of the three load circuits; or the number of the load switches (3) is three, the three load switches (3) are arranged in one-to-one correspondence with the three load circuits, and each load switch (3) is used for controlling the on-off of the corresponding load circuit; and/or

Load switch (3) are including gas bag (31) and mechanism case (32), be provided with wiring support (313) that are used for the wiring on gas bag (31), wiring support (313) extend along the direction that is on a parallel with the support base plane of shown looped netowrk cabinet, in order to be used for with cable (2) or female the arranging (6) of inlet wire are connected.

3. Ring main unit according to claim 1, characterized in that a guiding member (5) is installed in the main unit (1), and at least a part of the guiding member (5) is located below the load switch (3) to support the load switch (3) in a guiding manner.

4. The ring main unit according to claim 3, wherein the number of the guiding components (5) is plural, and the plural guiding components (5) and the plural load switches (3) are arranged in a one-to-one correspondence manner, so as to respectively play a role of guiding and supporting the installation of the corresponding load switches (3).

5. Ring main unit according to claim 3 or 4, characterized in that said guiding member (5) comprises an upper rail (51) and a lower rail (52) respectively located above and below said load switch (3), said upper rail (51) and lower rail (52) forming a guiding space, said load switch (3) being located in the guiding space to guide and support the installation of said load switch (3) by said guiding member (5).

6. Ring main unit according to claim 5, characterized in that in one of said guiding members (5), said upper rail (51) and/or said lower rail (52) are plural in number, and plural of said upper rail (51) and/or plural of said lower rail (52) are arranged at intervals along the horizontal direction to jointly function as a guiding support for the installation of said load switch (3).

7. Ring main unit according to claim 5, characterized in that said upper rail (51) and/or said lower rail (52) are provided with a guiding groove, and a part of said load switch (3) is located in said guiding groove to slide along said guiding groove, so as to provide a guiding and limiting function for the installation of said load switch (3) through said guiding groove.

8. Ring main unit as claimed in claim 1, characterized in that the ring main unit comprises a damping device (4), the damping device (4) is located between the main unit body (1) and the supporting base surface to buffer and damp the main unit body (1).

9. Ring main unit as claimed in claim 8, characterized in that said damping means (4) comprises:

the bottom plate (41) is used for being placed on a supporting base surface of the ring main unit;

the shock absorption component (42) is positioned between the cabinet body (1) and the bottom plate (41) so as to play a role in buffering and shock absorption on the cabinet body (1).

10. The ring main unit according to claim 9,

the bottom plate (41) is provided with a mounting groove (411) for mounting the damping component (42), one part of the damping component (42) is positioned in the mounting groove (411), and the other part of the damping component (42) extends towards the cabinet body (1) to be abutted against the cabinet body (1); and/or

The cabinet body (1) is connected with the damping component (42) through a fastening piece (43), a first through hole (11) for the fastening piece (43) to pass through is formed in the cabinet body (1), a second through hole (423) for the fastening piece (43) to pass through is formed in the damping component (42), a fastening hole is formed in the bottom plate (41), and one end of the fastening piece (43) penetrates through the first through hole (11) and the second through hole (423) and then is inserted into the fastening hole so as to fixedly connect the cabinet body (1), the damping component (42) and the bottom plate (41); and/or

The damping component (42) is made of rubber.

11. The ring main unit according to claim 9,

shock-absorbing component (42) include heelpiece (421) and set up contact arch (422) on heelpiece (421), heelpiece (421) be used for with bottom plate (41) butt, contact arch (422) are located heelpiece (421) are close to one side of the cabinet body (1), in order to be used for with the cabinet body (1) butt.

12. The ring main unit according to claim 11,

the contact bump (422) is annular or hemispherical; and/or

The number of the contact bulges (422) is multiple, and any two of the contact bulges (422) are arranged at intervals to be abutted against the cabinet body (1) together.

13. The ring main unit as claimed in claim 1, wherein the ring main unit comprises:

the cabinet comprises a partition plate (10), the partition plate (10) is arranged in the cabinet body (1) and used for dividing the interior of the cabinet body (1) into a plurality of chambers (7) which are sequentially arranged along the direction perpendicular to the supporting base surface, the chambers (7) are arranged in a one-to-one correspondence manner with the load switches (3), and the load switches (3) are respectively located in the chambers (7) correspondingly.

14. The ring main unit as claimed in claim 1, wherein the main unit (1) is provided with an opening portion, and the ring main unit comprises:

a cabinet door (8) provided at the opening portion, the cabinet door (8) being movably mounted on the cabinet body (1) to open or close the opening portion;

the interlocking device (9) is arranged on one side of the cabinet door (8) close to the inside of the cabinet body (1), the interlocking device (9) has a locking state for locking the cabinet door (8) and an unlocking state for unlocking the cabinet door (8) so as to open the cabinet door (8), and at least part of the interlocking device (9) is movably arranged along the horizontal direction to switch between the locking state and the unlocking state.

15. Ring main unit according to claim 14, characterized in that said interlocking means (9) comprises:

a fixed part (91) and a moving part (92), wherein one of the fixed part (91) and the moving part (92) is arranged on the cabinet door (8) and is positioned on one side of the cabinet door (8) close to the inside of the cabinet body (1), and the other of the fixed part (91) and the moving part (92) is arranged on the load switch (3);

a driving part in driving connection with the moving part (92), wherein at least part of the moving part (92) is movably arranged along the horizontal direction; so as to connect or disconnect the fixed part (91) and the moving part (92) by the movement of the moving part (92) to switch the interlocking device (9) between a locked state and an unlocked state.

16. The ring main unit according to claim 15,

fixed part (91) with be provided with the patchhole on one in motion portion (92), fixed part (91) with be provided with on another in motion portion (92) with patchhole grafting complex inserted bar (923), with pass through the drive of drive portion makes inserted bar (923) with patchhole grafting or separation.

17. The ring main unit as claimed in claim 16, wherein the insertion rod (923) is provided on the moving portion (92), the moving portion (92) and the driving portion are provided on the load switch (3), and the moving portion (92) further comprises:

the slider (922) is connected with the inserting rod (923), one end of the slider (922), which is far away from the crank (921), so that the slider (922) is driven to horizontally move through the rotation of the crank (921), and the inserting rod (923) is inserted into or separated from the inserting hole; or

The rack with insert pole (923) and connect, in order to pass through the rotation of gear drives rack horizontal migration, so that insert pole (923) with the patchhole is pegged graft or is separated.

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