CN115549283A

CN115549283A - Dual-power-supply fast switching ring main unit

Info

Publication number: CN115549283A
Application number: CN202211328940.4A
Authority: CN
Inventors: 孟庆霖; 徐建斌; 王瑞; 魏然; 许良; 孙京生; 张胜; 姚瑛; 祖国强; 胡帆; 章凯; 任桂田; 陈曦; 宫成; 赵冠桥; 刘彦婧; 马占军; 石振磊; 孙天硕
Original assignee: State Grid Tianjin Electric Power Co Chengxi Power Supply Branch; Tianjin Chengxi Guangyuan Power Engineering Co ltd; Tianjin Ninghe District Ningdong Shengyuan Power Engineering Co ltd; Tianjin Sanyuan Power Intelligent Technology Co ltd; Tianjin Tianyuan Electric Power Engineering Co ltd; State Grid Corp of China SGCC; State Grid Tianjin Electric Power Co Ltd
Current assignee: State Grid Tianjin Electric Power Co Chengxi Power Supply Branch; Tianjin Chengxi Guangyuan Power Engineering Co ltd; Tianjin Ninghe District Ningdong Shengyuan Power Engineering Co ltd; Tianjin Sanyuan Power Intelligent Technology Co ltd; Tianjin Tianyuan Electric Power Engineering Co ltd; State Grid Corp of China SGCC; State Grid Tianjin Electric Power Co Ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2022-12-30
Anticipated expiration: 2042-10-27
Also published as: CN115549283B

Abstract

The invention discloses a ring main unit capable of realizing rapid switching of double power supplies, and relates to the technical field of high-voltage switch equipment. The intelligent cabinet comprises a cabinet body and a first mounting plate, wherein a lifting mechanism is arranged inside the cabinet body, a square support is fixedly connected to the upper surface of the first mounting plate, a top cover is fixed to the top of the square support, a wire outlet is formed in the first mounting plate, a plurality of mounting holes are symmetrically formed in the first mounting plate, a double power supply controller and a double power supply change-over switch are arranged on the surface of the first mounting plate through the mounting holes, and the double power supply controller and the double power supply change-over switch are electrically connected. The double-power-supply controller and the double-power-supply change-over switch are pushed out from the interior of the cabinet body through the pushing mechanism, so that the double-power-supply controller and the double-power-supply change-over switch can be maintained and installed in an open environment without being detached during maintenance, and the installation and maintenance portability is effectively improved.

Description

Dual-power-supply fast switching ring main unit

Technical Field

The invention belongs to the technical field of high-voltage switch equipment, and particularly relates to a ring main unit capable of realizing rapid switching of double power supplies.

Background

A Ring Main Unit (Ring Main Unit) is a group of transmission and distribution electrical equipment (high-voltage switch equipment) which is arranged in a metal or nonmetal insulating cabinet body or is made into electrical equipment of an assembled interval type Ring Main power supply Unit, and the patent technology with the application number of CN201420733778.9 in the prior art discloses bidirectional automatic switching Ring Main equipment which comprises a Ring Main body, an operating mechanism, a load switch, a grounding operating mechanism and a grounding switch; the operating mechanism, the load switch, the grounding operating mechanism and the grounding switch are all arranged in the ring main unit body; the operating mechanism is connected with the load switch and drives the switching-on and switching-off of the load switch; the grounding operating mechanism is connected with the grounding switch and drives the grounding switch to be switched on and switched off.

However, when the equipment needs to be maintained, due to the fact that the openness of the used common cabinet body is not enough, when the equipment is installed and maintained, a hand needs to be stretched into the cabinet body or the equipment needs to be detached from the cabinet body for maintenance, the equipment is inconvenient to use, and wires are easily abraded or excessively bent to cause damage in the process of maintaining the equipment, so that a new solution needs to be provided for the above problems.

Disclosure of Invention

The invention aims to provide a ring main unit with double power supplies switched rapidly, which aims to solve the existing problems that: because the cabinet body openness is not enough when current equipment needs the maintenance, when installing and maintaining, need stretch into the internal portion of cabinet with the hand or need follow the internal portion of cabinet with equipment and tear out the back and maintain, it is very inconvenient when using, lead to wire rod wearing and tearing or buckle excessively to lead to damaging easily at the in-process of overhauing equipment.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the utility model provides a looped netowrk cabinet of dual supply fast switch-over, includes the cabinet body and first mounting panel, the internally mounted of the cabinet body has elevating system, elevating system is used for driving first mounting panel at the inside up-and-down motion of the cabinet body, the square top of supporting of last fixed surface of first mounting panel is fixed with the top cap, the outlet has been seted up to the inside of first mounting panel, the incoming line has been seted up in the front of the cabinet body, install wire rod protection mechanism between outlet and the incoming line, a plurality of mounting holes have been seted up to the inside symmetry of first mounting panel, dual supply controller and dual supply change over switch are installed through the mounting hole in the surface of first mounting panel, dual supply controller and dual supply change over switch electric connection, the bottom of the cabinet body is fixed with four first supporting legs.

Furthermore, the lifting mechanism comprises a sliding barrel, the sliding barrel is fixed to the lower surface of the interior of the cabinet body, the square support is connected to the outer surface of the sliding barrel in a sliding mode, a square sliding column is connected to the interior of the sliding barrel in a sliding mode, and the top of the square sliding column is fixedly connected with the square support.

Furthermore, elevating system still includes the motor, the top of motor is fixed with the casing, the internally mounted of casing has the speed reduction subassembly, the screw rod is installed at the top of speed reduction subassembly, the screw rod passes through the screw thread with square traveller and rotates and be connected.

Further, the speed reduction assembly comprises a first driving shaft, a second gear and a gear ring, the second gear is fixed at the output end of the motor, the gear ring is fixed on the inner wall of the shell, three first gears are meshed between the gear ring and the second gear, the inside of each first gear is rotatably connected with a second driving shaft, the first driving shaft is rotatably connected inside the shell, the second driving shaft is fixed at the bottom of the first driving shaft, and the bottom of the screw rod is fixedly connected with the top of the first driving shaft.

Further, wire rod protection mechanism includes the line concentration card, the positive at the line concentration card is installed to the spacing subassembly symmetry of wire rod.

Further, the wire limiting assembly comprises a square rotating plate and a square limiting block, round limiting columns are symmetrically fixed to one ends of two sides of the square rotating plate, the square limiting blocks are located at positions corresponding to the round limiting columns and fixedly connected with the wire concentration card, the round limiting columns are rotatably connected to the inside of the square limiting blocks, springs are mounted on the surfaces of the round limiting columns, one ends of the springs are fixedly connected with the square rotating plate, the other ends of the springs are fixedly connected with the square limiting blocks, and limiting sheets are fixed to the front face of the square rotating plate.

Furthermore, the ventilating and heat dissipating device comprises a ventilating and heat dissipating mechanism, wherein the ventilating and heat dissipating mechanism comprises fan assemblies which are symmetrically fixed at the bottom of the cabinet body and used for detecting the temperature and the humidity of the air in the cabinet body (1) and ventilating the cabinet body (1), and ventilating pipe orifices with switch valves are symmetrically arranged in the top cover.

Further, first supporting leg is fixed in the bottom of the cabinet body, symmetry is fixed with connecting plate and second mounting panel between first mounting panel and the top cap, the connecting plate is located the position department at first mounting panel both ends, the second mounting panel is located the position department between the connecting plate, dual power change over switch and dual power supply controller are fixed respectively at the upper surface of second mounting panel.

Further, the bottom symmetry of top cap is fixed with the second supporting leg, the inside of second supporting leg all is connected with the pulley through the pin rotation.

Compared with the prior art, the invention has the beneficial effects that:

(1) The double-power-supply controller and the double-power-supply change-over switch are pushed out from the interior of the cabinet body through the pushing mechanism, so that the double-power-supply controller and the double-power-supply change-over switch can be maintained and installed in an open environment without being detached during maintenance, and the installation and maintenance portability is effectively improved.

(2) According to the wire rod protection mechanism, the wire rod is effectively protected during installation and maintenance, and the service life of equipment is prolonged.

(3) The dual-power-supply controller and the dual-power-supply change-over switch can effectively dissipate heat through the heat dissipation mechanism.

(4) According to the invention, the temperature and the air humidity in the cabinet body can be detected through the fan assembly, so that the high temperature in the cabinet body can be avoided, the heavy moisture in the cabinet body can be prevented, and the purpose of protecting the electric components installed in the cabinet body 1 is achieved.

(5) According to the wire rod protection mechanism, the wire rod can be fixed in the wire rod protection mechanism more quickly and more conveniently through the wire rod limiting assembly, and the practicability of the equipment is effectively improved.

(6) The equipment can be used in different scenes by horizontally placing or vertically placing the equipment, so that the application range of the equipment is effectively enlarged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the overall transverse configuration of the present invention;

FIG. 2 is a schematic view of the connection structure inside the cabinet body according to the present invention;

FIG. 3 is a schematic view of a connection structure of a part of the pushing mechanism of the present invention;

FIG. 4 is a schematic view of a connection structure of a section of a pushing mechanism according to the present invention;

FIG. 5 is a schematic view of the coupling structure of the deceleration assembly of the present invention;

FIG. 6 is a schematic view of a connection structure of the wire limiting assembly and the cable collecting clip according to the present invention;

FIG. 7 is a schematic view of a connection structure of a portion of the wire limiting assembly according to the present invention;

FIG. 8 is a schematic view of the connection structure inside the case 01 when the present invention is vertically placed;

FIG. 9 is a schematic view of the internal connection structure of the present invention when it is vertically positioned 30;

FIG. 10 is a schematic view of the connection structure of the integral vertical mechanism of the present invention;

FIG. 11 is a schematic view of the connection structure of the pulley of the present invention;

FIG. 12 is a schematic view of a fan assembly within the cabinet of the present invention;

FIG. 13 is a schematic view of another perspective of the blower assembly in the cabinet of the present invention;

fig. 14 is an exploded view of the blower assembly inside the cabinet of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a cabinet body; 2. a top cover; 3. a dual power controller; 4. a vent pipe orifice with a switch valve; 5. supporting in a square shape; 6. a first support leg; 7. a wire inlet; 8. a fan assembly; 9. a first mounting plate; 10. an outlet; 11. a line collecting card; 12. a square rotating plate; 13. a square limiting block; 14. a circular limiting post; 15. a spring; 16. a square sliding column; 17. a screw; 18. a housing; 19. a motor; 20. a first drive shaft; 21. a ring gear; 22. a first gear; 23. a second gear; 24. a connecting plate; 25. a second mounting plate; 26. a second support leg; 27. a pulley; 28. a dual power transfer switch; 29. a limiting sheet; 30. a slide cylinder; 31. a second drive shaft; 32. a limiting block; 33; a component housing, 34; a first grid port, 35; a second grid port, 36; a temperature sensor 37; a humidity sensor 38; a dryer 39; an axial flow fan 40; an air filter net, 41; an electric push rod 42; and (7) sealing the block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1 to 11, the invention discloses a ring main unit with dual power supplies capable of being switched rapidly.

Specifically, please refer to fig. 1-2:

the intelligent cabinet comprises a cabinet body 1 and a first mounting plate 9, when equipment is prevented from moving transversely, a pushing mechanism is mounted inside the cabinet body 1 and used for driving the first mounting plate 9 to move up and down inside the cabinet body 1, a square support 5 is fixedly connected to the upper surface of the first mounting plate 9, a top cover 2 is fixed to the top of the square support 5, the top cover 2 is used for protecting the inside of the cabinet body 1 and preventing the internal structure from being damaged by the outside, a wire outlet 10 is formed in the first mounting plate 9, a wire inlet 7 is formed in the front of the cabinet body 1, a wire protection mechanism is mounted between the wire outlet 10 and the wire inlet 7 and used for protecting an accessed wire, the wire is easily extruded and bent in the operation process of the equipment, a plurality of mounting holes are symmetrically formed in the first mounting plate 9, a double-power-supply controller 3 and a double-power-supply changeover switch 28 are mounted on the surface of the first mounting plate 9 through the mounting holes, the double-supply controller 3 and the double-supply changeover switch 28 are electrically connected, four first support legs 6 are fixed to the bottom of the cabinet body 1 and used for supporting the equipment, and the double-supply controller 3 and the double-supply changeover switch 28 are fixed to the first mounting plate 9; specifically, dual power supply change over switch 28 is used for when the main power source has a power failure, makes stand-by power supply time of putting into be less than outlet 10ms, and the user can not feel the power failure, and consumer normally works, and dual power supply controller 3 is used for controlling dual power supply change over switch 28, and dual power supply controller 3 and dual power supply change over switch 28 are no longer given unnecessary details for prior art here.

When equipment is maintained, the square support 5 is driven to move upwards through the pushing mechanism, the square support 5 drives the first mounting plate 9 and the top cover 2 to move upwards, the first mounting plate 9 reaches the top of the cabinet body 1, the first mounting plate 9 drives the double-power-supply change-over switch 28 and the double-power-supply controller 3 to move upwards, the double-power-supply change-over switch 28 and the double-power-supply controller 3 reach the top of the cabinet body 1, maintenance and maintenance of the double-power-supply change-over switch 28 and the double-power-supply controller 3 are facilitated, the wire protection mechanism is installed between the wire outlet 10 and the wire inlet 7, wires are fixed inside the wire protection mechanism after entering from the wire inlet 7 and penetrate out from the wire outlet 10 to be connected with the double-power-supply change-over switch 28 and the double-power-supply controller 3, and the wire protection mechanism is used for preventing the wires from being damaged during operation of the equipment.

Referring to fig. 3, in one embodiment:

pushing mechanism is used for driving first mounting panel 9 and carries out up-and-down motion, and is specific: including slide cartridge 30, slide cartridge 30 fixes the lower surface in the cabinet body 1 inside, and square support 5 sliding connection is at the surface of slide cartridge 30, and the inside sliding connection of slide cartridge 30 has

square traveller

16, and 5 fixed connection are lived with square support to the top of square traveller 16, hold 5 and square traveller 16 through square support and slide respectively on the surface of slide cartridge 30 and inside, avoid first mounting panel 9 to produce when going up and down and rock.

Referring to fig. 4, in one embodiment:

pushing mechanism still includes motor 19, motor 19's top is fixed with casing 18, the internally mounted of casing 18 has the speed reduction subassembly, motor 19 drives the speed reduction subassembly, screw rod 17 is installed at the top of speed reduction subassembly, it rotates to drive screw rod 17 by drive assembly, screw rod 17 passes through the screw thread rotation with square traveller 16 and is connected, stopper 32 is installed at the top of screw rod 17, when screw rod 17 rotates, through the interact of screw thread, drive square traveller 16 upward movement, and hold 5 upward movements by square traveller 16 drive square support, hold 5 drive top cap 2 and first mounting panel 9 by square support and carry out upward movement, thereby realize that first mounting panel 9 goes up and down in the inside of the cabinet body 1.

Referring to fig. 5, in one embodiment:

the speed reduction assembly is used for driving the screw 17 to rotate, and specifically: the cabinet comprises a first driving shaft 20, a second gear 23 and a gear ring 21, wherein the second gear 23 is fixed at the output end of a motor 19, the gear ring 21 is fixed on the inner wall of a shell 18, three first gears 22 are meshed between the gear ring 21 and the second gear 23, a second driving shaft 31 is rotatably connected inside each first gear 22, the first driving shaft 20 is rotatably connected inside the shell 18, the second driving shaft 31 is fixed at the bottom of the first driving shaft 20, and the bottom of a screw 17 is fixedly connected with the top of the first driving shaft 20, so that the motor 19 rotates to drive the second gear 23 to rotate, the second gear 23 drives the first gear 22 to rotate, the gear ring 21 is meshed with the first gear 22, so that the first gear 22 rotates around the axis of the second gear 23, the second driving shaft 31 rotatably connected with the screw is driven to rotate around the axis of the second gear 23, the first driving shaft 20 is driven to rotate by the second driving shaft 31, the screw 17 is driven by the first driving shaft 20 to rotate, the gear 21, the first gear 22 and the gear 23 interact with each other to provide a torque for the motor 19 to increase the rotating speed and further stabilize the rotating speed of the cabinet body 19 and output torque of the cabinet body 9, and further stabilize the rotating speed of the cabinet body and the cabinet body when the motor is output torque of the cabinet body 1.

Referring to fig. 1-7, in one embodiment:

the wire rod protection mechanism includes line concentration card 11, and the wire rod protection mechanism rotates through a plurality of line concentration cards 11 to be connected and forms, and the spacing subassembly of wire rod is installed to line concentration card 11's front symmetry.

Can be convenient for make the wire rod fix in the inside of line concentration card 11 through the spacing subassembly of wire rod to protect the wire rod, it is specific: including square rotor 12 and square stopper 13, the one end symmetry of square rotor 12 both sides is fixed with circular spacing post 14, square stopper 13 all is located the position department that corresponds circular spacing post 14, and with line concentration card 11 fixed connection, circular spacing post 14 all rotates the inside of connecting at square stopper 13, rotate with square stopper 13 through circular spacing post 14 and be connected, can make square rotor 12 rotate around the axle center department of circular spacing post 14, spring 15 is all installed on the surface of circular spacing post 14, the one end and the square rotor 12 fixed connection of spring 15, the other end and the square stopper 13 fixed connection of spring 15, can provide the elastic force to square rotor 12 through square stopper 13, square rotor 12's front is fixed with spacing piece 29, spacing piece 29 is used for spacing square rotor 12 through contacting with line concentration card 11, make square rotor 12 only rotate to the inside of the cabinet body 1.

According to the structural design, when the wire is fixed, the wire is extruded to the square rotating plate 12, so that the square rotating plate 12 rotates towards the inside of the wire collecting clamp 11 under the action of elastic force, the wire enters the inside of the wire collecting clamp 11, the square rotating plate 12 returns under the action of the elastic force of the spring 15 and the limiting piece 29, the wire can be effectively prevented from being separated from the inside of the wire collecting clamp 11 through the limiting action of the limiting piece 29, when the first mounting plate 9 is lifted, the wire can be effectively prevented from being damaged, and the service life of the wire is prolonged;

still include ventilation cooling mechanism, ventilation cooling mechanism is used for dispelling the heat to dual power change over switch 28 and dual power controller 3, and is specific: including fan subassembly 8, the bottom at the cabinet body 1 is fixed to fan subassembly 8 symmetry, fan subassembly 8 is used for detecting the internal air temperature humidity of the cabinet body 1 and takes a breath to the cabinet body 1, the mouth of pipe 4 of ventilating of taking the ooff valve is seted up to the inside symmetry of top cap 2, the outside of the mouth of pipe 4 of ventilating of taking the ooff valve covers there is the dust screen, when the heat dissipation, inhale the inside of the cabinet body 1 with external air through fan subassembly 8, the air current is through the mounting hole and dispels the heat to dual supply change over switch 28 and dual supply controller 3, the air current rethread takes the mouth of pipe 4 of ventilating of ooff valve to discharge, thereby dispel the heat to dual supply change over switch 28 and dual supply controller 3 through the internal air current circulation of the cabinet body 1.

Referring to fig. 12-14, the fan assembly 8 includes an assembly housing 33, and a temperature sensor 36 and a humidity sensor 37 mounted on the assembly housing 33, with an axial fan 39, a dryer 38, and an air filter 40 within the assembly housing 33. One side of the component shell 33 is open, the other three sides of the component shell are provided with first grid net openings 34, the open side of the component shell 33 is installed on the inner wall of the cabinet body 1, and the inner wall of the cabinet body 1 on the open side of the component shell 33 is provided with a second grid net opening 35.

The axial flow fan 39 is positioned between the dryer 38 and the air filter screen 40, the dryer 38 is installed on the inner wall of the component housing 33 close to the first grille screen opening 34, and the air filter screen 40 is installed on the inner wall of the cabinet body 1 close to the second grille screen opening 35.

Still install the seal structure who is used for shutoff second grid net gape 35 on the cabinet body 1, seal structure includes electric putter 41 by motor drive, seal piece 42 is installed to electric putter 41's end, seal piece 42 is used for sealing second grid net gape 35.

At specific during operation, through external controller (not shown in the figure), detect the air temperature in the cabinet body 1 when temperature sensor 36 and exceed the alarm value, then control axial fan 39 circular telegram and carry out the forward rotation to air exhaust, thereby make the air in the cabinet body 1 circulate with the outside air, guarantee that the temperature is normal in the cabinet body 1, thereby the electric component of the installation in the protection cabinet body 1, the seal piece 42 is in initial condition this moment, does not block second grid net gape 35. When the humidity sensor 37 detects that the air humidity in the cabinet 1 exceeds the alarm value, the controller controls the dryer 38 to heat, controls the axial flow fan 39 to rotate reversely, and controls the electric push rod 41 to push the sealing block 42 to the second grid port 35 so as to block and seal the second grid port 35, at this time, because the first grid port 34 is opened on three sides of the module housing 33, the air in the cabinet 1 enters the module housing 33 from one part of the first grid port 34, and the hot air is blown into the cabinet 1 through the other part of the first grid port 34 after being heated by the PTC dryer 38, so that the air convection inside the cabinet 1 is formed, and the air humidity in the cabinet 1 meets the range required by the operation of the electric components installed in the cabinet 1. Through setting up air filter 40, can filter the purification to the air that enters into in the cabinet body 1 to play the effect of the electric component of the installation in the protection cabinet body 1.

When the air in the cabinet 1 is heated by the dryer 38, the on-off valve of the vent pipe 4 is closed. When the air in the cabinet 1 needs to be radiated by the axial flow fan 39, the on-off valve of the vent pipe opening 4 needs to be opened.

Example two

Referring to fig. 7-11, in the second embodiment, the apparatus is vertically disposed, which is different from the first embodiment:

the first supporting legs 6 are fixed at the bottom of the cabinet body 1, a connecting plate 24 and a second mounting plate 25 are symmetrically fixed between the first mounting plate 9 and the top cover 2, the connecting plate 24 is used for increasing the stability of connection between the top cover 2 and the first mounting plate 9, the connecting plate 24 is located at the positions of two ends of the first mounting plate 9, the second mounting plate 25 is located at the position between the connecting plates 24, the double-power-supply changeover switch 28 and the double-power-supply controller 3 are respectively fixed on the upper surface of the second mounting plate 25, the second supporting legs 26 are symmetrically fixed at the bottom of the top cover 2, pulleys 27 are rotatably connected inside the second supporting legs 26 through pins, the second supporting legs 26 and the pulleys 27 are used for moving the top cover 2, and the moving stability of equipment is improved;

on the basis of the first embodiment: drive square support through pushing mechanism and live 5 upward movements, and live 5 by square support and drive top cap 2 and second mounting panel 25 and control in the inside of the cabinet body 1, thereby release dual power change over switch 28 and dual power controller 3 from the inside of the cabinet body 1, be convenient for carry out maintenance and installation to dual power change over switch 28 and dual power controller 3, wire rod protection mechanism through the installation between outlet 10 and inlet 7, get into the back with the wire rod from inlet 7, fix it in wire rod protection mechanism's inside, wear out from outlet 10 again, thereby be connected with dual power change over switch 28 and dual power controller 3, then wire rod protection mechanism is used for preventing that the equipment operation wire rod from receiving the damage.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a looped netowrk cabinet of dual supply fast switch over, a serial communication port, including the cabinet body (1) and first mounting panel (9), the internally mounted of the cabinet body (1) has elevating system, elevating system is used for driving first mounting panel (9) at the inside up-and-down motion of the cabinet body (1), the last fixed surface of first mounting panel (9) is connected with square support (5), the top that square support (5) was fixed with top cap (2), outlet (10) have been seted up to the inside of first mounting panel (9), inlet (7) have been seted up in the front of the cabinet body (1), install wire rod protection mechanism between outlet (10) and inlet (7), a plurality of mounting holes have been seted up to the inside symmetry of first mounting panel (9), dual supply controller (3) and dual supply change over switch (28) are installed through the mounting hole to the surface of first mounting panel (9), dual supply controller (3) and dual supply change over switch (28) electric connection, the bottom of the cabinet body (1) is fixed with four first support legs (6).

2. The ring main unit with the dual power supplies capable of being rapidly switched according to claim 1, wherein the lifting mechanism comprises a sliding cylinder (30), the sliding cylinder (30) is fixed on the lower surface inside the main unit (1), the square support (5) is slidably connected to the outer surface of the sliding cylinder (30), a square sliding column (16) is slidably connected inside the sliding cylinder (30), and the top of the square sliding column (16) is fixedly connected with the square support (5).

3. The ring main unit with double power supplies switched rapidly as claimed in claim 2, wherein the lifting mechanism further comprises a motor (19), a housing (18) is fixed to the top of the motor (19), a speed reduction assembly is installed inside the housing (18), a screw (17) is installed at the top of the speed reduction assembly, and the screw (17) is rotatably connected with the square sliding column (16) through a thread.

4. The ring main unit with double power supplies switched rapidly as claimed in claim 3, wherein the speed reduction assembly comprises a first driving shaft (20), a second gear (23) and a gear ring (21), the second gear (23) is fixed at the output end of the motor (19), the gear ring (21) is fixed on the inner wall of the housing (18), three first gears (22) are engaged between the gear ring (21) and the second gear (23), the inside of the first gears (22) is connected with a second driving shaft (31) in a rotating manner, the first driving shaft (20) is connected in the housing (18) in a rotating manner, the second driving shaft (31) is fixed at the bottom of the first driving shaft (20), and the bottom of the screw (17) is fixedly connected with the top of the first driving shaft (20).

5. The dual power supply fast switching ring main unit according to claim 4, wherein the wire protection mechanism includes a line collecting card (11), and the wire limiting components are symmetrically installed on the front surface of the line collecting card (11).

6. The ring main unit capable of switching between two power supplies rapidly as claimed in claim 5, wherein the wire limiting assembly comprises a square rotating plate (12) and a square limiting block (13), one end of each of two sides of the square rotating plate (12) is symmetrically fixed with a circular limiting column (14), the square limiting block (13) is located at a position corresponding to the circular limiting column (14) and is fixedly connected with the line collecting card (11), the circular limiting columns (14) are rotatably connected inside the square limiting block (13), springs (15) are mounted on the surfaces of the circular limiting columns (14), one end of each spring (15) is fixedly connected with the square rotating plate (12), the other end of each spring (15) is fixedly connected with the square limiting block (13), and a limiting sheet (29) is fixed on the front surface of the square rotating plate (12).

7. The dual-power-supply fast switching ring main unit according to claim 6, further comprising a ventilation and heat dissipation mechanism, wherein the ventilation and heat dissipation mechanism comprises a fan assembly (8), the fan assembly (8) is symmetrically fixed at the bottom of the main body (1) and is used for detecting the temperature and humidity of the air in the main body (1) and ventilating the main body (1), and the top cover (2) is symmetrically provided with vent pipes (4) with switch valves.

8. The ring main unit with the dual power supplies capable of being rapidly switched according to claim 1, wherein the first supporting leg (6) is fixed at the bottom of the main unit body (1), a connecting plate (24) and a second mounting plate (25) are symmetrically fixed between the first mounting plate (9) and the top cover (2), the connecting plate (24) is located at positions at two ends of the first mounting plate (9), the second mounting plate (25) is located at a position between the connecting plates (24), and the dual power supply change-over switch (28) and the dual power supply controller (3) are respectively fixed on the upper surface of the second mounting plate (25).

9. The dual-power-supply fast-switching ring main unit according to claim 8, wherein second support legs (26) are symmetrically fixed to the bottom of the top cover (2), and pulleys (27) are rotatably connected to the inside of the second support legs (26) through pins.