CN113217771B

CN113217771B - Double-arm supporting bracket for ring main unit

Info

Publication number: CN113217771B
Application number: CN202110624982.1A
Authority: CN
Inventors: 应兵荣; 操隆震; 方健; 吴志峰; 柴架平; 张能响
Original assignee: Zhejiang Disiwei Electric Co ltd
Current assignee: Zhejiang Inred Electric Co ltd
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2022-11-04
Anticipated expiration: 2041-06-04
Also published as: CN113217771A

Abstract

The invention discloses a double-arm support for a ring main unit, which comprises two U-shaped plates, wherein four corners of the bottoms of the two U-shaped plates are respectively fixed with a connecting block, the bottoms of the connecting blocks are respectively fixed with a supporting rod, the bottoms of the supporting rods are respectively fixedly provided with a roller with a brake pad, two ends of one U-shaped plate are respectively fixed with an inserting plate, two ends of the other U-shaped plate are respectively provided with an inserting groove for inserting the inserting plate, two sides of the U-shaped plate provided with the inserting plate are symmetrically provided with a fixing piece, and a height adjusting device is arranged below the U-shaped plates.

Description

Double-arm supporting bracket for ring main unit

Technical Field

The invention relates to the technical field of ring main unit supports, in particular to a double-arm support for a ring main unit.

Background

The Ring Main Unit (Ring Main Unit) is a group of electric equipment (high-voltage switch equipment) which is arranged in a metal or nonmetal insulating cabinet body or is made into an assembled interval Ring Main power supply Unit, and the core part of the Ring Main Unit adopts a load switch and a fuse, so that the Ring Main Unit has the advantages of simple structure, small volume, low price, capability of improving power supply parameters and performance, power supply safety and the like. The transformer substation is widely used in distribution stations and box-type substations of load centers such as urban residential districts, high-rise buildings, large public buildings, factories and enterprises.

The existing ring main unit is generally installed on a foundation built on the ground or directly installed on the ground when being installed outdoors, and the ring main unit is large in size due to the fact that the existing foundation is high, so that the ring main unit is inconvenient to manually move and lift up and place on the foundation, and the ring main unit is inconvenient to install and wastes manpower and operation time. Therefore, a double-arm supporting bracket for a ring main unit is provided.

Disclosure of Invention

The invention aims to provide a double-arm support bracket for a ring main unit, which is used for solving the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a both arms support holder for looped netowrk cabinet, includes two U template, two U template bottom four corners is fixed with the connecting block respectively, the connecting block bottom is fixed with the bracing piece, the fixed gyro wheel that has the brake block that is equipped with in bracing piece bottom, one U template both ends all are fixed with picture peg, another U template both ends are equipped with the slot that is used for the picture peg of pegging graft, two evenly be equipped with a plurality of jacks on the picture peg, set up the slot the symmetry is equipped with first internal thread cover on the U template, threaded connection is used for pegging graft the first bolt in the jack on first internal thread cover, sets up the picture peg U template bilateral symmetry is equipped with the mounting that is used for fixed looped netowrk cabinet width, U template below is equipped with the movable support device that is used for supporting the looped netowrk cabinet bottom and is used for highly adjusting's height, is convenient for lifting up the looped netowrk cabinet bottom that will be located two looped netowrk cabinet bottoms through movable support device, is convenient for adjusting the looped netowrk cabinet's the height of being lifted up to be convenient for removing and place on the ground of co-altitude, the installation base of being convenient for saving looped netowrk cabinet, save the operation time with looped netowrk cabinet.

Preferably, height adjusting device includes a plurality of first threaded rods, and is a plurality of first threaded rods are fixed respectively in a plurality of connecting block bottoms, and all overlap on a plurality of first threaded rods and be equipped with the screwed pipe, screwed pipe outer wall cover is equipped with the bearing, the bearing outer wall is fixed with the sleeve pipe, sleeve pipe outer wall bottom is fixed with the connecting plate, be equipped with on the connecting plate and avoid connecting plate screwed pipe pivoted locating part, be equipped with on the sleeve pipe and be used for the synchronous pivoted first aggregate unit of a plurality of screwed pipes of simultaneous control, can make connecting plate and sleeve pipe reciprocate along first threaded rod direction.

Preferably, the first linkage device comprises two synchronous belts, a plurality of linkage gears are fixedly sleeved on the threaded pipe, the two synchronous belts are respectively positioned below the two U-shaped plates and sleeved on the two linkage gears, the two U-shaped plates are positioned below the same side, the upper parts of the threaded pipes are respectively fixedly sleeved with first bevel gears, the first bevel gears are connected with second bevel gears in a meshing manner, two rotating pipes are arranged between the second bevel gears, inserting rods are movably inserted at the two ends of the rotating pipes, two ends, far away from the rotating pipes, of the inserting rods are respectively fixed with the two second bevel gears and are rotatably connected with fixing plates, the fixing plates are fixed on the connecting plates, limiting plates are fixed on the inserting rods, sliding rails matched with the limiting plates are arranged on the inner walls of the rotating pipes, and a power device used for driving the rotating pipes to rotate is arranged on the rotating pipes, so that the four gears synchronously rotate, and therefore the four connecting plates synchronously reciprocate.

Preferably, the power device includes the worm wheel, the worm wheel is fixed to be cup jointed on the rotating tube, and the meshing is connected with the worm on the worm wheel, worm one end is rotated and is connected with the supporting shoe, the supporting shoe both ends cover is established on the rotating tube to rotate with the rotating tube and be connected, cup jointed two spacing rings on the worm, be equipped with the deflector between two spacing rings, the deflector middle part is equipped with the trompil, the one end that the supporting shoe was kept away from to the worm passes the trompil and is fixed with the first in command, the deflector top is fixed with the straight-bar, the sliding sleeve in straight-bar both ends is equipped with first fixed block, two first fixed block is fixed respectively in two U template bottoms, is convenient for drive four connecting plates through first in command and removes convenient operation.

Preferably, the locating part includes the gag lever post, first threaded rod bottom is fixed with the second fixed block, the gag lever post both ends are fixed with connecting block and second fixed block respectively, be fixed with spacing pipe on the connecting plate, the gag lever post activity runs through spacing pipe, avoids connecting plate and sleeve pipe to take place to rotate.

Preferably, the movable supporting device comprises a plurality of supporting plates, the supporting plates respectively movably penetrate through the plurality of connecting plates, and a second linkage device used for driving the plurality of supporting plates to move is arranged on the supporting plates, so that the ring main unit is conveniently supported, the ring main unit is separated from the ground, the height of the ring main unit is adjusted, or the ring main unit is placed on a foundation with a certain height or the ground through the recovery connecting plates.

Preferably, the second linkage includes a plurality of go-between, and is a plurality of the one end that looped netowrk cabinet was kept away from in the backup pad is fixed respectively to the go-between, and the activity is pegged graft between two go-between that are located same U template below has the push rod, be fixed with the connecting rod on the push rod, the one end that the push rod was kept away from to the connecting rod is fixed with second internal thread cover, two be connected with the dead lever between the second internal thread cover, the dead lever both ends are fixed with spin opposite direction's second threaded rod respectively, it is connected with the locating piece to rotate on the dead lever, the locating piece rotates with the rotating-tube to be connected, fixed cover is equipped with the second handle on the dead lever, is convenient for drive a plurality of backup pads simultaneously like the middle part release through rotating the second handle, inserts and put in looped netowrk cabinet bottom, or outwards remove the diffusion simultaneously, removes the supporting role to looped netowrk cabinet.

Preferably, the mounting includes two third internal thread covers, two the third internal thread cover symmetry is fixed at the both ends of a U template, and threaded connection has the second bolt on the third internal thread cover, second bolt one end passes third internal thread cover and U template in proper order and is fixed with to the piece, is convenient for fix the looped netowrk cabinet, avoids moving the in-process and causes the looped netowrk cabinet to rock.

Preferably, the inner walls of the U-shaped plates are symmetrically provided with grooves for accommodating the abutting blocks, so that the abutting blocks are prevented from exceeding the inner walls of the U-shaped plates to influence the placement of the ring-network cabinet.

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

according to the U-shaped plate type ring main unit, the bottoms of the ring main units positioned in the two U-shaped plates are conveniently lifted through the movable supporting devices, the lifted height of the ring main unit is conveniently adjusted through the height adjusting devices, so that the ring main unit is conveniently moved and placed on the foundation bases with different heights, the ring main unit is conveniently installed, and labor and operation time are saved.

Drawings

FIG. 1 is a front view of the overall structure of the present invention;

FIG. 2 is a side view of the overall structure of the present invention;

FIG. 3 is a rear view of the overall structure of the present invention;

FIG. 4 is a bottom view of the overall structure of the present invention;

FIG. 5 is a top view of the overall structure of the present invention;

FIG. 6 is an enlarged view of FIG. 2 at A;

FIG. 7 is an enlarged view of FIG. 2 at B;

fig. 8 is an enlarged view of fig. 2 at C.

In the figure: 1-U-shaped plate; 2, connecting blocks; 3-a support bar; 4-a roller; 5-inserting a plate; 6-slot; 7-a jack; 8-a first internal thread bush; 9-a first bolt; 10-a fixing member; 11-a movable support means; 12-height adjustment means; 13-a first threaded rod; 14-a threaded pipe; 15-a limiting rod; 16-a cannula; 17-a connecting plate; 18-a limit stop; 19-a first linkage; 20-synchronous belt; 21-a linkage gear; 22-a first bevel gear; 23-a second bevel gear; 24-a rotating tube; 25-a plunger; 26-fixing plate; 27-a limiting plate; 28-grooves; 29-a power plant; 30-a worm gear; 31-a worm; 32-a support block; 33-a guide plate; 34-a first handle; 35-straight rod; 36-a first fixing block; 37-a second fixed block; 38-a limit tube; 39-a support plate; 40-a second linkage; 41-connecting ring; 42-a push rod; 43-connecting rod; 44-a second internally threaded sleeve; 45-fixing the rod; 46-a second threaded rod; 47-positioning blocks; 48-a second handle; 49-a third internally threaded sleeve; 50-a second bolt; 51-a blocker.

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.

Referring to fig. 1-8, the present invention provides a technical solution: a double-arm support for a ring main unit comprises two U-shaped plates 1, wherein connecting blocks 2 are respectively fixed to four corners of the bottoms of the two U-shaped plates 1, supporting rods 3 are fixed to the bottoms of the connecting blocks 2, rollers 4 with brake pads are fixedly arranged at the bottoms of the supporting rods 3, and the ring main unit is conveniently driven to move to a required installation position through the rollers 4;

inserting plates 5 are fixed at two ends of one U-shaped plate 1, inserting grooves 6 for inserting the inserting plates 5 are formed in two ends of the other U-shaped plate 1, a plurality of inserting holes 7 are uniformly formed in the two inserting plates 5, first internal thread sleeves 8 are symmetrically arranged on the U-shaped plate 1 provided with the inserting grooves 6, first bolts 9 for being inserted into the inserting holes 7 are connected to the first internal thread sleeves 8 in a threaded mode, the total length of the two U-shaped plates 1 can be conveniently adjusted according to a long team of the ring main unit through the inserting rods 25 and the inserting grooves 6, and the adjusted shapes of the two U-shaped plates 1 can be conveniently fixed through the first bolts 9 so as to be matched with the ring main units of different models;

set up picture peg 5U template 1 both sides symmetry is equipped with the mounting 10 that is used for fixing the looped netowrk cabinet width, U template 1 below is equipped with the movable support device 11 that is used for supporting the looped netowrk cabinet bottom and is used for carrying out the height-adjusting device 12 adjusted to the height of looped netowrk cabinet.

Wherein, height adjusting device 12 includes a plurality of first threaded rods 13, and is a plurality of first threaded rods 13 are fixed respectively in 2 bottoms of a plurality of connecting blocks, and all overlap on a plurality of first threaded rods 13 and be equipped with screwed pipe 14, the 14 outer wall covers of screwed pipe are equipped with the bearing, the bearing outer wall is fixed with

sleeve pipe

16, 16 outer wall bottoms of sleeve pipe are fixed with connecting plate 17, be equipped with on the connecting plate 17 and avoid connecting plate 17 screwed pipe 14 pivoted locating part 18, through rotating screwed pipe 14, make screwed pipe 14 reciprocate along first threaded rod 13 direction when rotating on first threaded rod 13, through locating part 18, avoid connecting seat and sleeve pipe 16 to take place to rotate, make connecting plate 17 and sleeve pipe 16 reciprocate along with screwed pipe 14 along first threaded rod 13 direction.

A first linkage device 19 for simultaneously controlling the synchronous rotation of a plurality of threaded pipes 14 is arranged on the sleeve 16, the first linkage device 19 comprises two synchronous belts 20, a plurality of threaded pipes 14 are fixedly sleeved with linkage gears 21, the two synchronous belts 20 are respectively positioned below the two U-shaped plates 1 and are sleeved on the two linkage gears 21, the upper parts of the two threaded pipes 14 positioned on the same side below the two U-shaped plates 1 are respectively and fixedly sleeved with a first bevel gear 22, the first bevel gear 22 is in meshing connection with a second bevel gear 23, a rotating pipe 24 is arranged between the two second bevel gears 23, two ends of the rotating pipe 24 are movably inserted with plug rods 25, one ends of the two plug rods 25 far away from the rotating pipe 24 are respectively fixed with the two second bevel gears 23 and are rotatably connected with fixing plates 26, the fixing plates 26 are fixed on the connecting plate 17 and are movably inserted with the rotating pipe 24 through the plug rods 25, so that the total length of the rotating pipe 24 of the plug rods 25 can be adjusted according to the change of the connecting length of the two U-shaped plates 1 in actual conditions;

a limiting plate 27 is fixed on the inserted link 25, a sliding rail matched with the limiting plate 27 is arranged on the inner wall of the rotating tube 24, and the rotating tube 24 and the inserted link 25 synchronously rotate through the limiting plate 27 and the sliding rail, so that the synchronous rotation of the two second bevel gears 23 is synchronously controlled, and the relative rotation of the rotating tube 24 and the inserted link 25 is avoided;

the rotating pipe 24 is provided with a power device 29 for driving the rotating pipe 24 to rotate, the power device 29 comprises a worm wheel 30, the worm wheel 30 is fixedly sleeved on the rotating pipe 24, the worm wheel 30 is connected with a worm 31 in a meshing manner, one end of the worm 31 is rotatably connected with a supporting block 32, two ends of the supporting block 32 are sleeved on the rotating pipe 24 and are rotatably connected with the rotating pipe 24, the worm 31 is sleeved with two limiting rings 321, a guide plate 33 is arranged between the two limiting rings 321, the middle part of the guide plate 33 is provided with an opening, one end of the worm 31 far away from the supporting block 32 penetrates through the opening and is fixed with a first handle 34,

a straight rod 35 is fixed on the top of the guide plate 33, first fixing blocks 36 are slidably sleeved at two ends of the straight rod 35, the two first fixing blocks 36 are respectively fixed at the bottoms of the two U-shaped plates 1, and the first handle 34 and the worm 31 are kept stable through the guide plate 33; the worm wheel 30 and the worm 31 have a self-locking function, and can be randomly adjusted to a required height and then stopped at any time, so that the four connecting plates 17 are driven to move through the first handle 34, and the operation is convenient.

Wherein, locating part 18 includes gag lever post 15, first threaded rod 13 bottom is fixed with second fixed block 37, gag lever post 15 both ends are fixed with connecting block 2 and second fixed block 37 respectively, be fixed with spacing pipe 38 on the connecting plate 17, gag lever post 15 activity runs through spacing pipe 38, avoids connecting plate 17 and sleeve pipe 16 to take place to rotate.

The movable supporting device 11 comprises a plurality of supporting plates 39, the supporting plates 39 respectively and movably penetrate through the connecting plates 17, the shape of the supporting plates 39 is U-shaped, and the first threaded rod 13 is prevented from influencing the movement of the supporting plates 39;

the ring main unit is supported by a plurality of supporting plates 39, the worm 31 and the worm wheel 30 are driven to rotate by rotating the first handle 34, the rotating pipe 24 and the inserting rod 25 are further driven to rotate, so that the second bevel gear 23 fixed on the inserting rod 25 is driven to rotate, the first bevel gear 22 is further driven to rotate, the threaded pipe 14 is driven to rotate on the first threaded rod 13, the linkage gear 21 sleeved on the threaded pipe 14 is driven to rotate, and through the synchronous belt 20, a plurality of connecting plates 17 and supporting plates 39 which are rotationally connected with the threaded pipe 14 are synchronously driven to move in the up-and-down direction, so that the ring main unit placed on the supporting plates 39 is driven to perform height adjustment, and the ring main unit is conveniently and accurately placed on bases with different heights or on the ground.

A second linkage device 40 for driving the plurality of support plates 39 to move simultaneously is arranged on the support plates 39, the second linkage device 40 comprises a plurality of connecting rings 41, the plurality of connecting rings 41 are respectively fixed at one ends of the support plates 39 far away from the ring main unit, a push rod 42 is movably inserted between the two connecting rings 41 positioned below the same U-shaped plate 1, and two ends of the push rod 42 are respectively perpendicular to the two support plates 39, so that the minimum force can be provided for the movement of the support plates 39;

a connecting rod 43 is fixed on the push rod 42, a second internal thread sleeve 44 is fixed at one end of the connecting rod 43 away from the push rod 42, a fixed rod 45 is connected between the two second internal thread sleeves 44, second threaded rods 46 with opposite spinning directions are respectively fixed at two ends of the fixed rod 45, a positioning block 47 is rotatably connected on the fixed rod 45, the positioning block 47 is rotatably connected with the rotating tube 24, a second handle 48 is fixedly sleeved on the fixed rod 45, so that the second handle 48 is rotated to drive the plurality of supporting plates 39 to be simultaneously pushed out like the middle part and inserted at the bottom of the ring main unit or simultaneously move outwards for diffusion, and the supporting effect on the ring main unit is removed; when the position of the supporting plate 39 needs to be adjusted to support or release the ring main unit, the second handle 48 is rotated to drive the fixing rod 45 and the second threaded rod 46 to rotate, the second internal threaded sleeve 44 and the connecting rod 43 are driven to move along the direction of the second threaded rod 46, the push rod 42 is driven to move by the movement of the connecting rod 43, and the supporting plate 39 is pushed out or pulled back while the connecting ring 41 is further driven to slide on the push rod 42.

The fixing member 10 includes two third internal thread sleeves 49, the two third internal thread sleeves 49 are symmetrically fixed at two ends of one u-shaped plate 1, and a second bolt 50 is threadedly connected to the third internal thread sleeves 49, one end of the second bolt 50 sequentially passes through the third internal thread sleeves 49 and the u-shaped plate 1 to be fixed with a support block 51, so as to fix the ring main unit conveniently and avoid shaking of the ring main unit in the moving process;

firstly, the lengths of two U-shaped plates 1 are pulled to the maximum, the idler wheel 4 is pushed, the ring main unit is positioned in the two U-shaped plates 1, then the total lengths of the two U-shaped plates 1 are reduced for pre-fixing, the plurality of supporting plates 39 are simultaneously inserted into the bottom of the ring main unit by rotating the second handle 48, then the first handle 34 is controlled to drive the supporting plates 39 and the ring main unit to move upwards to the required height, then the first bolt 9 and the second bolt 50 are screwed, and the ring main unit can be moved to the required installation position through the idler wheel 4.

In addition, the inner wall of the u-shaped plate 1 is symmetrically provided with grooves 28 for accommodating the abutting blocks 51, so that the abutting blocks 51 are prevented from exceeding the inner wall of the u-shaped plate 1 to influence the placement of the ring-network cabinet.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a looped netowrk is both arms support bracket for cabinet, its characterized in that includes:

two U template (1), two U template (1) bottom four corners is fixed with connecting block (2) respectively, connecting block (2) bottom is fixed with bracing piece (3), the fixed gyro wheel (4) that have the brake block that is equipped with in bracing piece (3) bottom, one U template (1) both ends all are fixed with picture peg (5), another U template (1) both ends are equipped with slot (6) that are used for pegging graft picture peg (5), evenly be equipped with a plurality of jacks (7) on two picture pegs (5), the symmetry is equipped with first internal thread cover (8) on the U template (1) that sets up slot (6), threaded connection has first bolt (9) that are used for pegging graft in jack (7) on first internal thread cover (8);

the fixing piece (10) is arranged on one U-shaped plate (1) provided with the inserting plate (5) and used for fixing the width of the ring main unit;

the U-shaped template comprises a U-shaped template (1), a movable supporting device (11), a U-shaped supporting device and a U-shaped supporting device, wherein the movable supporting device (11) is positioned below the U-shaped template (1) and is used for supporting the bottom of the ring-network cabinet;

the height adjusting device (12) is positioned below the U-shaped plates (1) and used for adjusting the height of the ring-network cabinet;

the height adjusting device (12) comprises a plurality of first threaded rods (13), the first threaded rods (13) are respectively fixed at the bottoms of the connecting blocks (2), threaded pipes (14) are respectively sleeved on the first threaded rods (13), bearings are sleeved on the outer walls of the threaded pipes (14), sleeve pipes (16) are fixed on the outer walls of the bearings, connecting plates (17) are fixed at the bottoms of the outer walls of the sleeve pipes (16), a limiting piece (18) for preventing the connecting plates (17) from rotating the threaded pipes (14) is arranged on the connecting plates (17), a first linkage device (19) for simultaneously controlling the synchronous rotation of the threaded pipes (14) is arranged on each sleeve pipe (16), the first linkage device (19) comprises two synchronous belts (20) which are connected with one side of each threaded pipe (14) in a fixed mode, the two synchronous belts (20) are respectively arranged below the two U-shaped plates (1), the two U-shaped plates are sleeved on the two linkage gears (21), the two U-shaped plates are positioned below the two U-shaped plates (1) on the same side of each threaded pipe (14), two bevel gears (23) are connected with two rotating rods (24), two bevel gears (23) are connected with two bevel gears (23), two the one end that the rotating tube (24) was kept away from in inserted bar (25) is fixed with two second bevel gears (23) respectively, and rotates and be connected with fixed plate (26), fixed plate (26) are fixed on connecting plate (17), be fixed with limiting plate (27) on inserted bar (25), rotating tube (24) inner wall is equipped with the slide rail with limiting plate (27) assorted, be equipped with on rotating tube (24) and be used for driving rotating tube (24) pivoted power device (29), power device (29) are including worm wheel (30), worm wheel (30) are fixed cup joints on rotating tube (24), and the meshing is connected with worm (31) on worm wheel (30), worm (31) one end is rotated and is connected with supporting shoe (32), supporting shoe (32) both ends cover is established on rotating tube (24) to rotate with rotating tube (24) and be connected, worm (31) are gone up and have been cup jointed two spacing rings (321), are equipped with deflector (33) between two spacing rings (321), deflector (33) middle part is equipped with supporting shoe (31), worm (31) one end that keep away from rotating tube (32) is passed fixed with the trompil (34), the trompil (35), the straight-bar (35) top is equipped with first trompil (35), the two first fixing blocks (36) are respectively fixed at the bottoms of the two U-shaped plates (1).

2. The double-arm support bracket for the ring main unit as claimed in claim 1, wherein: the locating part (18) comprises a locating rod (15), a second fixing block (37) is fixed to the bottom of the first threaded rod (13), two ends of the locating rod (15) are fixed to the connecting block (2) and the second fixing block (37) respectively, a limiting pipe (38) is fixed to the connecting plate (17), and the locating rod (15) penetrates through the limiting pipe (38) movably.

3. The double-arm support bracket for the ring main unit as claimed in claim 2, wherein: the movable supporting device (11) comprises a plurality of supporting plates (39), the supporting plates (39) respectively penetrate through the connecting plates (17) in a movable mode, and a second linkage device (40) used for driving the supporting plates (39) to move simultaneously is arranged on the supporting plates (39).

4. A double arm support bracket for ring main units as claimed in claim 3, wherein: second linkage (40) are including a plurality of go-between (41), and are a plurality of go-between (41) are fixed respectively and are kept away from the one end of looped netowrk cabinet in backup pad (39), and it has push rod (42) to be located the activity grafting between two go-between (41) of same U template (1) below, be fixed with connecting rod (43) on push rod (42), the one end that push rod (42) were kept away from in connecting rod (43) is fixed with second internal thread cover (44), two be connected with dead lever (45) between second internal thread cover (44), dead lever (45) both ends are fixed with second threaded rod (46) that spin opposite direction respectively, it is connected with locating piece (47) to rotate on dead lever (45), locating piece (47) and rotating tube (24) rotate to be connected, fixed cover is equipped with second handle (48) on dead lever (45).

5. A double-arm support bracket for ring main unit as claimed in claim 4, wherein: the fixing piece (10) comprises two third internal thread sleeves (49), the third internal thread sleeves (49) are symmetrically fixed at two ends of one U-shaped plate (1), a second bolt (50) is in threaded connection with the third internal thread sleeves (49), and one end of the second bolt (50) sequentially penetrates through the third internal thread sleeves (49) and the U-shaped plate (1) and is fixed with a butting block (51).

6. A double arm support bracket for ring main units as claimed in claim 5, wherein: the inner wall of the U-shaped plate (1) is symmetrically provided with grooves (28) for accommodating the abutting blocks (51).