CN116345383A

CN116345383A - Branch box mounting structure for power grid

Info

Publication number: CN116345383A
Application number: CN202310308600.3A
Authority: CN
Inventors: 赵正萍; 徐晨; 胡娟
Original assignee: Anhui Baihua Electric Technology Co ltd
Current assignee: Anhui Baihua Electric Technology Co ltd
Priority date: 2023-03-27
Filing date: 2023-03-27
Publication date: 2023-06-27

Abstract

The invention is applicable to the technical field of installation of branch boxes of power grids, and provides a branch box installation structure for a power grid, which comprises a fixed plate and further comprises: the main board is arranged on one side of the fixed board, two ends of the main board are respectively fixed with a side board, the side boards are fixedly connected with the fixed board, and two mounting frames are arranged on the main board in a sliding manner; the support adjusting assembly is used for supporting the mounting frames and controlling the two mounting frames to synchronously approach or separate; the first rotary table and the second rotary table are rotatably arranged on the mounting frame, a first gear ring and a second gear ring of the first rotary table and the second rotary table are in meshed connection, and a first fixed support and a second fixed support are also arranged on the upper sides of the first rotary table and the second rotary table relatively; and the transmission assembly is used for simultaneously driving the first rotary table or the second rotary table on the two mounting frames to reversely rotate. The invention can carry out rapid adaptive clamping and fixing on the branch box, and remarkably improves the installation efficiency.

Description

Branch box mounting structure for power grid

Technical Field

The invention belongs to the technical field of installation of branch boxes of power grids, and particularly relates to a branch box installation structure for a power grid.

Background

The branch box is generally used as a cable branch, and the main function of the branch box is to tap or transfer a cable, and mainly plays roles of cable tapping and cable transferring.

The existing installation mount for installing cable branch box is usually placed on the bracket, then realizes final fixing through a plurality of laths and bolt cooperation, and is comparatively loaded down with trivial details troublesome of fixing, influences installation effectiveness, and a set of fixed frock can only be adapted to the branch box installation of a certain or several models and is fixed, has the limitation, needs to improve.

Therefore, in view of the above-mentioned current situation, there is an urgent need to develop a branch box installation structure for a power grid, so as to overcome the shortcomings in the current practical application.

Disclosure of Invention

The embodiment of the invention aims to provide a branch box mounting structure for a power grid, and aims to solve the problems that the existing fixing mode is complicated and troublesome in fixing and the mounting efficiency is affected.

The embodiment of the invention is realized in such a way that the branch box mounting structure for the power grid comprises a fixed plate and further comprises: the main board is arranged on one side of the fixed board, two ends of the main board are respectively fixed with a side board, the side boards are fixedly connected with the fixed board, and two mounting frames are slidably arranged on the main board; the support adjusting assembly is used for supporting the mounting frames and controlling the two mounting frames to synchronously approach or depart; the first rotary table and the second rotary table are rotatably arranged on the mounting frame, a first gear ring and a second gear ring are respectively arranged on the outer sides of the first rotary table and the second rotary table, the first gear ring is in meshed connection with the second gear ring, a first fixed support and a second fixed support are also oppositely arranged on the upper sides of the first rotary table and the second rotary table, and the first fixed support and the second fixed support are also connected through a guide assembly; the transmission assembly is further arranged on the side plate and connected with the first rotary table or the second rotary table on the two mounting frames, and the transmission assembly is used for driving the first rotary table or the second rotary table on the two mounting frames to reversely rotate at the same time, so that the first fixing support and the second fixing support are close to each other and clamp and fix the split box body.

According to a further technical scheme, the main board is perpendicular to the fixing board, and a plurality of fixing holes are formed in the fixing board; the mounting frame is connected with the main board in an anti-slip sliding mode.

According to a further technical scheme, the support adjusting assembly comprises a first fixing bolt, a first knob and a positive and negative threaded shaft, a threaded hole is formed in the mounting frame, the positive and negative threaded shaft penetrates through the threaded hole, the positive and negative threaded shaft is in threaded connection with the threaded hole of the mounting frame, two ends of the positive and negative threaded shaft are further in rotational connection with the side plates, the first knob is further fixedly arranged at one end of the positive and negative threaded shaft, and a first fixing bolt for fixing the positive and negative threaded shaft is further arranged on one side plate; when the front and back threaded shafts rotate, the two mounting frames are synchronously close to or far away from each other.

According to a further technical scheme, rotary shafts are fixedly arranged in the middle of the lower sides of the first rotary table and the second rotary table, and the rotary shafts are in rotary connection with the mounting frame; the transmission assembly comprises a second knob, a second fixing bolt, a transmission shaft, a long gear and an end face gear, wherein the end face gear is further arranged on the lower side of the first rotary table or the second rotary table, the end face gear is fixedly connected with the lower end of the rotation shaft, the transmission shaft is further arranged on the lower side of the end face gear, the long gear which is simultaneously meshed and connected with the two end face gears is fixedly arranged on the transmission shaft, the two ends of the transmission shaft are further rotationally connected with the side plates, the second knob is fixedly arranged at one end of the transmission shaft, and a second fixing bolt for fixing the transmission shaft is further arranged on one side plate.

According to a further technical scheme, the long gear is parallel to the positive and negative threaded shafts, the central axis of the long gear penetrates through the central axes of the two face gears, and the long gear is meshed and connected with one side, close to the two face gears, of the long gear.

Further technical scheme, the pivot is all installed in the downside of first fixed bolster and second fixed bolster rotation, and movable chamber has been seted up respectively to corresponding first fixed bolster and second fixed bolster on first carousel and the second carousel, and the pivot stretches into in the movable chamber, and the top of first carousel and second carousel still is equipped with the movable mouth that is used for the pivot activity, and movable mouth and movable chamber intercommunication, the upper portion and the lower part in movable chamber are equipped with first guide disc and the second guide disc with pivot fixed connection respectively, first guide disc still with the top sliding connection in movable chamber, the bottom sliding connection in second guide disc still and movable chamber, the middle part in movable chamber still circumference distributes and is equipped with many elastic components, the outer end and the movable chamber lateral wall fixed connection of elastic component, the inner and the pivot fixed connection of elastic component.

According to a further technical scheme, the movable opening is in a round shape; the first guide disc and the second guide disc are of disc-shaped structures, and the diameters of the first guide disc and the second guide disc are smaller than the diameter of the movable cavity; the elastic piece adopts elastic ropes or springs.

Further technical scheme, first fixed bolster and second fixed bolster's structure is the same, and first fixed bolster and second fixed bolster all include rectangular flat board, and flat board rotates to be installed in the upper end of fulcrum, and flat board's upside integrated into one piece is equipped with the L shaped plate, and the L shaped plate of first fixed bolster and second fixed bolster of arranging on the same mounting bracket sets up relatively, and the L shaped plate of two first fixed bolsters and two second fixed bolsters is used for carrying out the centre gripping fixed to the bottom corner of feeder pillar body.

According to a further technical scheme, the guide assembly comprises a first outer cylinder, an inner rod and a second outer cylinder, wherein the first outer cylinder and the second outer cylinder are respectively fixed on the outer sides of L-shaped plates of a first fixed support and a second fixed support which are arranged on the same installation frame, the inner rod is arranged between the first outer cylinder and the second outer cylinder, and the inner rod is in sliding connection with the first outer cylinder and the second outer cylinder; the upper sides of the flat plates of the first fixed support and the second fixed support and one side surface of the L-shaped plate, which is close to the branch box body, are provided with a plurality of balls.

Further technical scheme, two intermediate position between first fixed bolster and the two second fixed bolster still is equipped with discoid supporting disk, installs a plurality of supporting balls on the supporting disk, and the supporting disk is still fixed with the mainboard connection through the support frame.

According to the branch box mounting structure for the power grid, provided by the embodiment of the invention, the distance between the two mounting frames can be regulated by limiting, so that the branch box mounting structure can adapt to the mounting and fixing requirements of branch box bodies with different model widths, namely, the two mounting frames are controlled to synchronously approach or separate by the supporting and regulating assembly, and the purpose of regulation is achieved; the first gear ring and the second gear ring are defined to be in meshed connection, the first fixed support and the second fixed support are connected through the guide assembly, when the transmission assembly drives the first rotary table or the second rotary table on the two mounting frames to reversely rotate at the same time, the first fixed support and the second fixed support can be close to each other and clamp and fix the branch box body, namely the quick clamping and fixing of the branch box body is realized, and the mounting efficiency is remarkably improved.

Drawings

Fig. 1 is a schematic structural diagram of a branch box installation structure for a power grid according to an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 in a bottom view;

fig. 3 is a schematic top view structure of a branch box installation structure for a power grid according to an embodiment of the present invention;

fig. 4 is a schematic bottom view of a branch box installation structure for a power grid according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a front view structure of a branch box installation structure for a power grid according to an embodiment of the present invention;

fig. 6 is an enlarged sectional view schematically illustrating a portion a in fig. 5.

In the figure: the main body of the branch box comprises a 1-branch box body, a 2-first fixed support, a 3-fixed plate, a 4-first rotary table, a 5-first gear ring, a 6-supporting ball, a 7-supporting disk, an 8-supporting frame, a 9-first outer cylinder, a 10-fixed hole, a 11-side plate, a 12-inner rod, a 13-first fixed bolt, a 14-first knob, a 15-second outer cylinder, a 16-second knob, a 17-second fixed bolt, a 18-transmission shaft, a 19-mounting frame, a 20-long gear, a 21-positive and negative threaded shaft, a 22-end face gear, a 23-second gear ring, a 24-second rotary table, a 25-second fixed support, a 26-main plate, a 27-rotary shaft, a 28-supporting shaft, a 29-movable opening, a 30-movable cavity, a 31-elastic piece, a 32-first guide disk and a 33-second guide disk.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Specific implementations of the invention are described in detail below in connection with specific embodiments.

As shown in fig. 1 to 5, a branch box installation structure for a power grid according to an embodiment of the present invention includes a fixing plate 3, and further includes:

the main board 26 is arranged on one side of the fixed board 3, two ends of the main board 26 are respectively fixed with one side board 11, the side boards 11 are fixedly connected with the fixed board 3, and two mounting frames 19 are slidably arranged on the main board 26;

the support adjusting assembly is arranged on the side plate 11 and is connected with the two mounting frames 19, and the support adjusting assembly is used for supporting the mounting frames 19 and controlling the two mounting frames 19 to synchronously approach or separate;

the first rotating disc 4 and the second rotating disc 24 are rotatably arranged on the mounting frame 19, a first gear ring 5 and a second gear ring 23 are respectively arranged on the outer sides of the first rotating disc 4 and the second rotating disc 24, the first gear ring 5 and the second gear ring 23 are in meshed connection, a first fixed support 2 and a second fixed support 25 are also arranged on the upper sides of the first rotating disc 4 and the second rotating disc 24 relatively, and the first fixed support 2 and the second fixed support 25 are also connected through a guide assembly;

the transmission assembly is further arranged on the side plate 11 and connected with the first rotary table 4 or the second rotary table 24 on the two mounting frames 19, and the transmission assembly is used for simultaneously driving the first rotary table 4 or the second rotary table 24 on the two mounting frames 19 to reversely rotate, so that the first fixing support 2 and the second fixing support 25 are close to each other and clamp and fix the branch box body 1.

In the embodiment of the invention, the distance between the two mounting frames 19 can be regulated by limiting, so that the mounting and fixing requirements of the branch box body 1 with different model widths can be met, namely, the two mounting frames 19 are controlled to synchronously approach or separate by the supporting and regulating assembly, so as to achieve the aim of regulation; the first gear ring 5 and the second gear ring 23 are defined to be in meshed connection, the first fixed support 2 and the second fixed support 25 are connected through the guide assembly, and when the transmission assembly drives the first rotary table 4 or the second rotary table 24 on the two mounting frames 19 to reversely rotate at the same time, the first fixed support 2 and the second fixed support 25 can be close to each other and clamp and fix the branch box body 1, namely, the quick clamping and fixing of the branch box body 1 is realized, and the installation efficiency is remarkably improved.

As shown in fig. 1-2, as a preferred embodiment of the present invention, the main board 26 is disposed perpendicular to the fixing board 3, and a plurality of fixing holes 10 are further formed in the fixing board 3, so as to fix the fixing board 3 on a wall or a pole, which is not particularly limited.

The mounting frame 19 and the main board 26 are connected in an anti-slip manner, ribs are arranged on two sides of the main board 26, grooves which are in sliding connection with the ribs are correspondingly arranged on two sides of the mounting frame 19, anti-slip connection is achieved, and the reliability of movement of the mounting frame 19 is improved.

The support adjusting assembly comprises a first fixing bolt 13, a first knob 14 and a positive and negative threaded shaft 21, a threaded hole is formed in the mounting frame 19, the positive and negative threaded shaft 21 penetrates through the threaded hole, the positive and negative threaded shaft 21 is in threaded connection with the threaded hole of the mounting frame 19, two ends of the positive and negative threaded shaft 21 are further in rotational connection with the side plates 11, the first knob 14 is further fixedly arranged at one end of the positive and negative threaded shaft 21, the positive and negative threaded shaft 21 is conveniently rotated through the first knob 14, and a first fixing bolt 13 for fixing the positive and negative threaded shaft 21 is further arranged on one side plate 11; when the front and back threaded shafts 21 rotate, the two mounting frames 19 are synchronously close to or far away from each other, and the front and back threaded shafts 21 are locked through the first fixing bolts 13 after the adjustment is finished, so that the mounting frames 19 are guaranteed to be in a stable state.

As shown in fig. 1-5, as a preferred embodiment of the present invention, the lower middle parts of the first rotating disc 4 and the second rotating disc 24 are respectively provided with a rotating shaft 27, the rotating shafts 27 are rotatably connected with the mounting frame 19, so as to achieve the purpose of rotatably supporting the first rotating disc 4 and the second rotating disc 24, and the first gear ring 5 and the second gear ring 23 are reliably meshed.

The transmission assembly comprises a second knob 16, a second fixing bolt 17, a transmission shaft 18, a long gear 20 and a face gear 22, the face gear 22 is further arranged on the lower side of the first rotary disk 4 or the second rotary disk 24, the face gear 22 is fixedly connected with the lower end of a rotating shaft 27, so that the face gear 22 and the first rotary disk 4 or the second rotary disk 24 are meshed and synchronously rotate, the transmission shaft 18 is further arranged on the lower side of the face gear 22, the long gear 20 which is meshed and connected with the two face gears 22 simultaneously is fixedly arranged on the transmission shaft 18, two ends of the transmission shaft 18 are further connected with the side plates 11 in a rotating mode, the second knob 16 is fixedly arranged at one end portion of the transmission shaft 18, the transmission shaft 18 can be driven to rotate through the second knob 16, and a second fixing bolt 17 used for fixing the transmission shaft 18 is further arranged on one side plate 11.

In one embodiment, as shown in fig. 4, the long gear 20 is parallel to the front and back threaded shafts 21, and the central axes of the long gear 20 pass through the central axes of the two face gears 22, and the long gear 20 is meshed with one side of the two face gears 22, which is close to the two face gears 22, so as to facilitate the change adjustment of the distance between the two face gears 22 and maximize the adjustment range; when the long gear 20 rotates, the rotation directions of the two face gears 22 are opposite, so that the rotation directions of the two first turntables 4 or the second turntables 24 are opposite, and finally the rotation directions shown in fig. 3 are reached, so that the first fixed support 2 and the second fixed support 25 can be close to each other. In addition, the purpose of the long gear 20 and the face gear 22 is not only transmission, but also to adapt to the distance change between the two mounting frames 19, and in the adjusting range, the long gear 20 can be ensured to be always meshed with the two face gears 22, and the transmission is reliable.

As shown in fig. 1, 5 and 6, as a preferred embodiment of the present invention, the lower sides of the first fixed support 2 and the second fixed support 25 are rotatably provided with a support shaft 28, the first rotating disc 4 and the second rotating disc 24 are respectively provided with a movable cavity 30 corresponding to the first fixed support 2 and the second fixed support 25, the support shaft 28 extends into the movable cavity 30, the top of the first rotating disc 4 and the top of the second rotating disc 24 are further provided with a movable opening 29 for the support shaft 28 to move, the movable opening 29 adopts a circular shape, the movable opening 29 is communicated with the movable cavity 30, the upper part and the lower part of the movable cavity 30 are respectively provided with a first guide disc 32 and a second guide disc 33 fixedly connected with the support shaft 28, the first guide disc 32 and the second guide disc 33 adopt disc-shaped structures, the diameters of the first guide disc 32 and the second guide disc 33 are smaller than the diameters of the movable cavity 30, the first guide disc 32 is further slidably connected with the top of the movable cavity 30, the second guide disc 33 is further slidably connected with the bottom of the movable cavity 30, the middle part of the movable cavity 30 is further circumferentially provided with a plurality of elastic pieces 31, and the elastic pieces 31 are preferably distributed in the circumferential direction, and are connected with the outer ends of the movable cavity 30 by elastic pieces 31, and the elastic pieces are preferably provided with elastic pieces 31; through the setting of first guide disc 32 and second guide disc 33, can guarantee the stability that fulcrum 28 moved, and through elastic component 31 to fulcrum 28 elastic support, can do benefit to first fixed bolster 2 and second fixed bolster 25 to branch case body 1 elasticity centre gripping fixed, make first fixed bolster 2 and second fixed bolster 25's a side earlier with branch case body 1 during the butt, continue to rotate first carousel 4 and second carousel 24, utilize the removal of fulcrum 28, thereby make the another side of first fixed bolster 2 and second fixed bolster 25 and branch case body 1 butt, reach holistic fixed purpose.

The structures of the first fixing support 2 and the second fixing support 25 are the same, the first fixing support 2 and the second fixing support 25 comprise rectangular flat plates, the flat plates are rotatably mounted at the upper end of the support shaft 28, the upper side of each flat plate is integrally formed with an L-shaped plate, the L-shaped plates of the first fixing support 2 and the second fixing support 25 arranged on the same mounting frame 19 are oppositely arranged, the L-shaped plates of the two first fixing supports 2 and the two second fixing supports 25 are used for clamping and fixing the bottom corners of the branch box body 1, and the arrangement mode in fig. 1 is adopted, and is not limited and repeated.

The guide assembly comprises a first outer cylinder 9, an inner rod 12 and a second outer cylinder 15, wherein the outer sides of L-shaped plates of a first fixed support 2 and a second fixed support 25 which are arranged on the same mounting frame 19 are respectively fixed with the first outer cylinder 9 and the second outer cylinder 15, the inner rod 12 is arranged between the first outer cylinder 9 and the second outer cylinder 15, the inner rod 12 is in sliding connection with the first outer cylinder 9 and the second outer cylinder 15, the first fixed support 2 and the second fixed support 25 can be ensured to be always positioned in the direction of clamping the branch box body 1 through the limitation of the first outer cylinder 9, the inner rod 12 and the second outer cylinder 15, namely, the first fixed support 2 and the second fixed support 25 are prevented from changing along with the rotation of a first rotary disc 4 and a second rotary disc 24, and the reliability is improved.

In one embodiment, in order to reduce friction between the first fixing support 2 and the second fixing support 25 and the branch box body 1, a plurality of balls (not shown) are respectively arranged on the upper sides of the flat plates of the first fixing support 2 and the second fixing support 25 and on one side surface of the L-shaped plate, which is close to the branch box body 1, so that the supporting and clamping effect of the first fixing support 2 and the second fixing support 25 on the branch box body 1 is improved.

As shown in fig. 1, as a preferred embodiment of the present invention, a disc-shaped supporting disc 7 is further disposed at a middle position between the two first fixing supports 2 and the two second fixing supports 25, a plurality of supporting balls 6 are mounted on the supporting disc 7, the supporting disc 7 is further connected and fixed with the main board 26 through a supporting frame 8, the supporting disc 7 is correspondingly arranged, the first gear ring 5 and the second gear ring 23 are prevented from abutting against the supporting disc 7, the auxiliary support can be performed on the branch box body 1 through the arrangement of the supporting disc 7, the first fixing supports 2 and the second fixing supports 25 are adjusted in place, the branch box body 1 is clamped and fixed, and finally the integral fixation of the branch box body 1 is realized. Preferably, the upper surface of the supporting ball 6 is flush with the upper surfaces of the plates of the first fixing support 2 and the second fixing support 25, and if the balls are mounted on the plates, the upper surface of the supporting ball 6 is flush with the upper surfaces of the balls, which will not be described.

In the above embodiment of the present invention, the fixing plate 3 is fixed at a suitable position when in use, the distance between the two mounting frames 19 is adjusted by rotating the first knob 14 according to the model width of the main body 1 of the branch box, and then the distance between the first fixing support 2 and the second fixing support 25 on both sides is adjusted, and then the second knob 16 is rotated, so that the distance between the first fixing support 2 and the second fixing support 25 on one side is changed, and both the two first fixing supports 2 and the two second fixing supports 25 are matched with the main body 1 of the branch box; then place branch box body 1 on supporting disk 7, continue to rotate second knob 16, can drive two face gears 22 through long gear 20 and rotate simultaneously for two first fixed support 2 and two second fixed support 25 are by the transmission motion simultaneously, finally reach two first fixed support 2 and two second fixed support 25 and to the fixed purpose of branch box body 1 centre gripping, match the middle part support of supporting disk 7, make branch box body 1 by reliable installation fixed. In addition, by limiting that the first fixed support 2 can elastically move relative to the first rotary disc 4, the second fixed support 25 can elastically move relative to the second rotary disc 24, the branch box body 1 can be adaptively and elastically clamped and fixed, namely after one side surfaces of L-shaped plates of the first fixed support 2 and the second fixed support 25 are abutted against the branch box body 1, the first rotary disc 4 and the second rotary disc 24 are continuously rotated, the other side surfaces of L-shaped plates of the first fixed support 2 and the second fixed support 25 are abutted against the branch box body 1, so that the aim of reliable abutting between the first fixed support 2 and the second fixed support 25 and the branch box body 1 is fulfilled, and meanwhile, the installation and fixation flexibility and the support stability of the branch box body 1 are improved; through the limitation of the first outer cylinder 9, the inner rod 12 and the second outer cylinder 15, the first fixed support 2 and the second fixed support 25 can be ensured to stably move relative to the branch box body 1 all the time, the first fixed support 2 and the second fixed support 25 are prevented from being twisted, and the reliability of clamping and fixing operation is improved.

In addition, the model and the specific installation connection of each component are not limited, the components can be flexibly arranged in practical application, and the protection of the invention does not relate to the improvement of software and a method.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. The utility model provides a branch box mounting structure for electric wire netting, includes the fixed plate, its characterized in that still includes:

the main board is arranged on one side of the fixed board, two ends of the main board are respectively fixed with a side board, the side boards are fixedly connected with the fixed board, and two mounting frames are slidably arranged on the main board;

the support adjusting assembly is used for supporting the mounting frames and controlling the two mounting frames to synchronously approach or depart;

the first rotary table and the second rotary table are rotatably arranged on the mounting frame, a first gear ring and a second gear ring are respectively arranged on the outer sides of the first rotary table and the second rotary table, the first gear ring is in meshed connection with the second gear ring, a first fixed support and a second fixed support are also oppositely arranged on the upper sides of the first rotary table and the second rotary table, and the first fixed support and the second fixed support are also connected through a guide assembly;

the transmission assembly is further arranged on the side plate and connected with the first rotary table or the second rotary table on the two mounting frames, and the transmission assembly is used for driving the first rotary table or the second rotary table on the two mounting frames to reversely rotate at the same time, so that the first fixing support and the second fixing support are close to each other and clamp and fix the split box body.

2. The branch box installation structure for the power grid according to claim 1, wherein the main board is perpendicular to the fixing board, and a plurality of fixing holes are formed in the fixing board;

the mounting frame is connected with the main board in an anti-slip sliding mode.

3. The branch box mounting structure for a power grid according to claim 1 or 2, wherein the support adjustment assembly includes a first fixing bolt, a first knob, and a forward and reverse threaded shaft;

the mounting frame is provided with a threaded hole, the front and back threaded shafts penetrate through the threaded hole, the front and back threaded shafts are in threaded connection with the threaded hole of the mounting frame, and two ends of the front and back threaded shafts are also in rotary connection with the side plates;

a first knob is fixedly arranged at one end part of the positive and negative threaded shaft;

one of the side plates is also provided with a first fixing bolt for fixing the front and back threaded shafts;

when the front and back threaded shafts rotate, the two mounting frames are synchronously close to or far away from each other.

4. The branch box installation structure for the power grid according to claim 3, wherein the middle parts of the lower sides of the first turntable and the second turntable are respectively provided with a rotating shaft fixedly, and the rotating shafts are rotatably connected with the installation frame;

the transmission assembly comprises a second knob, a second fixing bolt, a transmission shaft, a long gear and an end gear;

the lower side of the first rotary table or the second rotary table is also provided with a face gear which is fixedly connected with the lower end of the rotating shaft, the lower side of the face gear is also provided with a transmission shaft, a long gear which is simultaneously meshed and connected with the two face gears is fixedly arranged on the transmission shaft, and two ends of the transmission shaft are also rotationally connected with the side plates;

a second knob is fixedly arranged at one end of the transmission shaft;

and a second fixing bolt for fixing the transmission shaft is further arranged on one side plate.

5. The branch box mounting structure for a power grid according to claim 4, wherein the long gear is parallel to the positive and negative threaded shafts, the central axis of the long gear passes through the central axes of the two face gears, and the long gear is meshed with one side, close to the two face gears.

6. The branch box installation structure for the power grid according to claim 4, wherein the lower sides of the first fixed support and the second fixed support are respectively provided with a support shaft in a rotating way, and the first turntable and the second turntable are respectively provided with a movable cavity corresponding to the first fixed support and the second fixed support, and the support shafts extend into the movable cavities;

the tops of the first turntable and the second turntable are also provided with a movable opening for supporting shaft movement, and the movable opening is communicated with the movable cavity;

the upper part and the lower part of the movable cavity are respectively provided with a first guide disc and a second guide disc which are fixedly connected with the support shaft, the first guide disc is also in sliding connection with the top of the movable cavity, and the second guide disc is also in sliding connection with the bottom of the movable cavity;

the middle part of the movable cavity is also circumferentially provided with a plurality of elastic pieces, the outer ends of the elastic pieces are fixedly connected with the side wall of the movable cavity, and the inner ends of the elastic pieces are fixedly connected with the support shafts.

7. The branch box installation structure for a power grid according to claim 6, wherein the movable port is circular;

the first guide disc and the second guide disc are of disc-shaped structures, and the diameters of the first guide disc and the second guide disc are smaller than the diameter of the movable cavity;

the elastic piece adopts elastic ropes or springs.

8. The branch box installation structure for the power grid according to claim 6, wherein the first fixed support and the second fixed support have the same structure, the first fixed support and the second fixed support each comprise a rectangular flat plate, the flat plates are rotatably installed at the upper end parts of the support shafts, and the upper sides of the flat plates are integrally formed with L-shaped plates;

the L-shaped plates of the first fixed support and the second fixed support which are arranged on the same mounting frame are oppositely arranged;

the L-shaped plates of the two first fixing supports and the two second fixing supports are used for clamping and fixing the bottom corners of the branch box body.

9. The branch box mounting structure for a power grid according to claim 8, wherein the guide assembly includes a first outer cylinder, an inner rod, and a second outer cylinder;

the outer sides of the L-shaped plates of the first fixed support and the second fixed support arranged on the same mounting frame are respectively fixed with a first outer cylinder and a second outer cylinder, an inner rod is arranged between the first outer cylinder and the second outer cylinder, and the inner rod is in sliding connection with the first outer cylinder and the second outer cylinder;

the upper sides of the flat plates of the first fixed support and the second fixed support and one side surface of the L-shaped plate, which is close to the branch box body, are provided with a plurality of balls.

10. The branch box installation structure for the power grid according to claim 9, wherein a disc-shaped supporting disc is further arranged at the middle position between the two first fixed supports and the two second fixed supports, and a plurality of supporting balls are arranged on the supporting disc;

the supporting plate is also fixedly connected with the main board through a supporting frame.