CN114006324A

CN114006324A - Lightweight cable bridge

Info

Publication number: CN114006324A
Application number: CN202111269456.4A
Authority: CN
Inventors: 郭力嘉
Original assignee: Zhenjiang Changda Electrical Co ltd
Current assignee: Zhenjiang Changda Electrical Co ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-02-01
Anticipated expiration: 2041-10-29
Also published as: CN114006324B

Abstract

The invention relates to the technical field of cable bridges, and discloses a lightweight cable bridge, which solves the problem that the cable bridge is easy to deform when the internal pressure of the cable bridge is large, and comprises a main bridge, wherein the outer wall of the main bridge is provided with a middle reinforcing rib, the bottom wall of the main bridge is symmetrically and equidistantly provided with first heat dissipation holes, two sides of the middle reinforcing rib are symmetrically provided with side bridge components, each side bridge component comprises sliding grooves symmetrically arranged on two sides of the main bridge, the outer sides of the sliding grooves are slidably connected with side bridges, and the top ends of the side bridges are equidistantly provided with second heat dissipation holes; in the working process, the side bridges are symmetrically arranged on the two sides of the main bridge, when more cables are arranged in the main bridge, the side bridges on the two sides are adjusted to move towards the middle reinforcing rib, so that the bearing thickness of the main bridge is increased, the compression strength of the main bridge is improved, the main bridge is prevented from being deformed after being compressed, and the protection of the main bridge is improved.

Description

Lightweight cable bridge

Technical Field

The invention belongs to the technical field of cable bridges, and particularly relates to a lightweight cable bridge.

Background

With the development of intelligent buildings, an alternating current strong current system, a weak current system, a direct current strong current system and various automatic systems, such as a building automatic system, an office automatic system, a communication automatic system and the like, often exist in the same building at the same time. Therefore, it is necessary to simultaneously lay various types of cables such as an ac strong electric cable, a dc strong electric cable, a communication cable in weak current, and a control cable. Various different cables need to be separately wired during design and wiring, so a cable bridge for arranging the cables is gradually used in a large range, and the cable bridge is generally suitable for places such as large enterprises, large engineering power transformation, cable erection, cable laying of large bridges and subways, ocean drilling and the like. Most of the existing cable bridges are made of integral metal frames, so that the integral structure is heavy, the manufacturing cost is high, the transportation, the assembly and the disassembly are not facilitated, and the cable bridges are widely used, so that the light cable bridges are pursued.

Because the number of cables needing to be installed in the cable bridge is different at different positions, when the number of cables needing to be installed is large, the cable bridge is easy to deform under pressure, and the cable bridge is damaged.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the lightweight cable bridge, and the problem that the cable bridge is easy to deform when the inside of the cable bridge is greatly pressed is effectively solved.

In order to achieve the purpose, the invention provides the following technical scheme: a lightweight cable bridge comprises a main bridge, wherein a middle reinforcing rib is arranged on the outer wall of the main bridge, first heat dissipation holes are symmetrically and equidistantly formed in the bottom wall of the main bridge, side bridge components are symmetrically arranged on two sides of the middle reinforcing rib, and a heat dissipation component is arranged inside the middle reinforcing rib;

the side bridge frame assembly comprises sliding grooves symmetrically arranged on two sides of the main bridge frame, the outer side of each sliding groove is connected with a side bridge frame in a sliding mode, second radiating holes are formed in the top end of each side bridge frame in an equidistant mode, a U-shaped groove is formed in the inner portion of each side bridge frame, a U-shaped plate is arranged in the U-shaped groove, a limiting block is arranged on the lower top wall of the U-shaped plate in an equidistant mode, and a bottom spring is arranged at the bottom end of the U-shaped plate in an equidistant mode.

Preferably, the top of U type groove runs through to the outside of side crane span structure, and the top of U template is located the outside of side crane span structure, and the shape of stopper is the same with the shape of first louvre, stopper and first louvre joint.

Preferably, install the connecting plate on the lower roof of side crane span structure, the layer board is installed on the top of connecting plate, and the intercommunication groove has been seted up to the top equidistance of layer board, and connecting plate and layer board are pegged graft in T type inslot portion, and inside main crane span structure was seted up to T type groove symmetry, the internally mounted of side crane span structure had coupling assembling.

Preferably, coupling assembling sets up the turn trough in one of them side crane span structure one side including the symmetry, the inside rotation of turn trough is connected with the screw rod, the externally mounted of screw rod has limit gear, the mounting groove has been seted up to the inside of screw rod, the transverse spring is installed to one side of mounting groove, the connecting rod is installed to one side of transverse spring, first magnetic path is installed to one side of connecting rod, the spacing groove has been seted up at the middle part of turn trough, limit gear installs in the spacing inslot portion, the turn trough has been seted up to one side of spacing groove, dial the turn trough and run through to the outside of side crane span structure, another the spiral shell groove has been seted up to one side symmetry of side crane span structure, the spread groove has been seted up to one side of spiral shell groove.

Preferably, one side of the connecting groove is provided with a second magnetic block, the second magnetic block is arranged on one side of the middle reinforcing rib, and the connecting groove is matched with the connecting rod.

Preferably, radiator unit is including installing in the motor of middle part strengthening rib one side, the friction roller is installed to the output shaft bottom of motor, the output pole is installed to the bottom of friction roller, first helical gear is installed to the bottom of output pole, the bottom meshing of first helical gear is connected with the second helical gear, the internally mounted of second helical gear has the bull stick, drive gear is installed to the both ends symmetry of bull stick, drive gear's outside meshing is connected with the belt, the inboard still meshing of belt is connected with rotating gear, the flabellum pole is installed to one side of rotating gear, the flabellum pole rotates to be connected in the inside of air-out groove, one side that the air-out groove symmetry was seted up, the opposite side symmetry seted up the radiating groove, and one side also seted up the radiating groove.

Preferably, friction plates are symmetrically arranged on two sides of the friction roller, friction plate springs are symmetrically arranged on one sides of the friction plates, side plates are arranged on one sides of the friction plate springs, connecting springs are arranged on one sides of the side plates, and one sides of the connecting springs are fixedly connected with one sides of the connecting springs.

Preferably, the two friction plates are different in height, the friction plate on one side of the friction roller is connected with the side plate on the other side of the friction roller through a friction plate spring, and the friction plate is tightly attached to the outer wall of the friction roller.

Preferably, clamping blocks are arranged on one side of one of the side bridges at equal intervals, clamping grooves are formed in one side of the other side bridge at equal intervals, the clamping blocks are matched with the clamping grooves, and bolt connecting plates are symmetrically arranged on two sides of the side bridges.

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

1) in the work, the side bridges are symmetrically arranged on the two sides of the main bridge, when more cables are arranged in the main bridge, the side bridges on the two sides are adjusted to move towards the middle reinforcing rib, so that the bearing thickness of the main bridge is increased, the compression strength of the main bridge is improved, the main bridge is prevented from being deformed after being compressed, and the protection of the main bridge is improved;

2) in the operation, after the U-shaped plate is pressed downwards, the limiting block is separated from the first heat dissipation holes, so that the main bridge frame is separated from the side bridge frame, the side bridge frame is moved to adjust the length of the bridge frame, after the required length is adjusted, the U-shaped plate is loosened, the U-shaped plate is upwards bounced under the action of the bottom spring, the limiting block is clamped with the corresponding first heat dissipation holes, the side bridge frame is fixed again, then in the assembling and installing process of the main bridge frame, the length adjustment is carried out through the side bridge frame, the cutting and the cutting of the main bridge frame are avoided, and the installation convenience is improved;

3) in operation, after the output shaft of motor drives the output lever and rotates, under the transmission of first helical gear and second helical gear, drive the bull stick and rotate, and the drive gear of bull stick intercepts through the belt meshing with the bull gear outside of flabellum pole, thereby it rotates at the inside air-out inslot to drive the flabellum pole under the transmission of belt, thereby it discharges from the radiating groove of main crane span structure opposite side fast to drive the inside air of main crane span structure, thereby improve the inside radiating rate of main crane span structure, simultaneously through the position that changes the side crane span structure, thereby friction disc spring's elasticity changes, make the friction disc different to the frictional resistance of friction roller, thereby change the slew velocity of flabellum pole, thereby under different cable quantity, make the radiating rate change, then reach suitable radiating efficiency.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a main bridge according to the present invention;

FIG. 3 is a schematic view of the side bridge construction of the present invention;

FIG. 4 is a schematic view of the internal structure of the side bridge of the present invention;

FIG. 5 is a schematic structural view of a U-shaped plate according to the present invention;

FIG. 6 is a schematic view of the screw structure of the present invention;

FIG. 7 is a schematic view of the spiral groove structure of the present invention;

FIG. 8 is a schematic structural diagram of a heat dissipation assembly of the present invention;

FIG. 9 is a schematic view of a blade bar according to the present invention;

FIG. 10 is a schematic view of a friction plate according to the present invention.

In the figure: 1. a main bridge frame; 2. a middle reinforcing rib; 3. a first heat dissipation hole; 4. a side axle frame assembly; 401. a chute; 402. a T-shaped groove; 403. a side bridge frame; 404. a second heat dissipation hole; 405. a connecting plate; 406. a support plate; 407. a communicating groove; 408. a U-shaped groove; 409. a U-shaped plate; 410. a limiting block; 411. a bottom spring; 5. a connecting assembly; 501. rotating the groove; 502. a screw; 503. a limit gear; 504. mounting grooves; 505. a connecting rod; 506. a first magnetic block; 507. a lateral spring; 508. a screw groove; 509. connecting grooves; 510. a dial-rotating groove; 511. a second magnetic block; 6. a clamping block; 7. a card slot; 8. a bolt connecting plate; 9. a heat dissipating component; 901. a motor; 902. a rubbing roller; 903. an output rod; 904. a first helical gear; 905. a second helical gear; 906. a rotating rod; 907. a transmission gear; 908. a belt; 909. a rotating gear; 910. a fan blade rod; 911. a friction plate; 912. a friction plate spring; 913. a side plate; 914. a connecting spring; 915. an air outlet groove; 916. a heat dissipation groove.

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.

In the first embodiment, as shown in fig. 1 to 10, the present invention includes a main bridge frame 1, a middle reinforcing rib 2 is installed on an outer wall of the main bridge frame 1, first heat dissipating holes 3 are symmetrically and equidistantly formed in a bottom wall of the main bridge frame 1, side bridge frame assemblies 4 are symmetrically installed on both sides of the middle reinforcing rib 2, a heat dissipating assembly 9 is installed inside the middle reinforcing rib 2, each side bridge frame assembly 4 includes sliding grooves 401 symmetrically formed in both sides of the main bridge frame 1, a side bridge frame 403 is slidably connected to an outer side of the sliding groove 401, second heat dissipating holes 404 are equidistantly formed in a top end of the side bridge frame 403, a U-shaped groove 408 is formed inside the side bridge frame 403, a U-shaped plate 409 is installed inside the U-shaped groove 408, limit blocks 410 are equidistantly installed on a lower top wall of the U-shaped plate 409, bottom springs 411 are equidistantly installed at a bottom end of the U-shaped plate 409, a top end of the U-shaped groove 408 penetrates to an outer side of the side bridge frame 403, and a top end of the U-shaped plate 409 is located outside the side bridge frame 403, the shape of the limiting block 410 is the same as that of the first heat dissipation hole 3, and the limiting block 410 is clamped with the first heat dissipation hole 3;

when more cables need to be installed in the main bridge frame 1, the bearing force of the main bridge frame 1 needs to be increased at the moment, so that the U-shaped plate 409 on the side bridge frame 403 is pressed downwards, the bottom spring 411 is installed at the bottom end of the U-shaped plate 409, so that the top end of the U-shaped plate 409 enters the U-shaped groove 408 after the U-shaped plate 409 moves downwards, the limiting blocks 410 are installed on the lower top wall of the U-shaped plate 409 at equal intervals, when the U-shaped plate 409 is not pressed downwards, the limiting blocks 410 are clamped with the first heat dissipation holes 3 under the action of the bottom spring 411, when the U-shaped plate 409 moves downwards, the limiting blocks 410 are driven to be separated from the first heat dissipation holes 3, so that the side bridge frame 403 is separated from the main bridge frame 1 in a clamping manner, the side bridge frame 403 is connected with the first heat dissipation holes 3 in a sliding manner through the sliding grooves 401, so that the side bridge frames 403 on the two sides of the main bridge frame 1 move towards the middle reinforcing rib 2 at equal intervals, and when the main bridge frame 1 moves to the required length, the U-shaped plate 409 is loosened at the moment, the U-shaped plate 409 is under the elastic force action of the bottom spring 411, the bottom spring 411 pushes the U-shaped plate 409 to move upwards, the limiting block 410 is clamped with the corresponding first heat dissipation hole 3, the bottom end of the main bridge frame 1 is combined with the side bridge frame 403 at the moment, and the overlapping position of the side bridge frame 403 and the main bridge frame 1 is increased at the moment, so that the compression strength of the main bridge frame 1 is increased, the bearing capacity of the main bridge frame 1 is increased, and the deformation of the main bridge frame 1 is reduced.

In the second embodiment, on the basis of the first embodiment, a connecting plate 405 is installed on the lower top wall of the side bridge 403, a supporting plate 406 is installed at the top end of the connecting plate 405, communicating grooves 407 are equidistantly formed in the top end of the supporting plate 406, the connecting plate 405 and the supporting plate 406 are inserted into the T-shaped groove 402, the T-shaped groove 402 is symmetrically formed in the main bridge 1, and the connecting assembly 5 is installed in the side bridge 403; when the cable volume of main crane span structure 1 internally mounted is less, press the U type board 409 this moment, pull out side crane span structure 403 to the outside, because connecting plate 405 and layer board 406 are installed to the lower roof of side crane span structure 403, and connecting plate 405 and layer board 406 are pegged graft inside T type groove 402, when layer board 406 pulls out, the difference in height of the top of layer board 406 and the lower roof of main crane span structure 1 is less, thereby make the cable can steadily install, intercommunication groove 407 has been seted up to the top of layer board 406 simultaneously, can not block first louvre 3 and second louvre 404 through intercommunication groove 407 and dispel the heat to the inside cable of main crane span structure 1.

Third embodiment, on the basis of the second embodiment, the connection assembly 5 includes a rotary slot 501 symmetrically disposed on one side of one of the side bridges 403, a screw 502 is rotatably connected inside the rotary slot 501, a limit gear 503 is mounted on the outside of the screw 502, a mounting slot 504 is formed inside the screw 502, a transverse spring 507 is mounted on one side of the mounting slot 504, a connecting rod 505 is mounted on one side of the transverse spring 507, a first magnetic block 506 is mounted on one side of the connecting rod 505, a limit slot is formed in the middle of the rotary slot 501, the limit gear 503 is mounted inside the limit slot, a dial slot 510 is formed on one side of the limit slot, the dial slot 510 penetrates to the outside of the side bridge 403, a spiral slot 508 is symmetrically formed on one side of the other side bridge 403, a connecting slot 509 is formed on one side of the spiral slot 508, a second magnetic block 511 is disposed on one side of the connecting slot 509, and the second magnetic block is mounted on one side of the middle reinforcing rib 2, the connecting groove 509 is matched with the connecting rod 505, one side of one of the side bridges 403 is equidistantly provided with a fixture block 6, one side of the other side bridge 403 is equidistantly provided with a fixture groove 7, the fixture block 6 is matched with the fixture groove 7, and two sides of the side bridges 403 are symmetrically provided with bolt connecting plates 8;

after the length of the main bridge frame 1 is adjusted, at this time, after two main bridge frames 1 are installed in parallel, the screw 502 on the side bridge frame 403 on the first main bridge frame 1 is corresponding to the spiral groove 508 of the side bridge frame 403 on the second main bridge frame 1, the limiting gear 503 limited in the rotary groove 501 is shifted through the shifting rotary groove 510, the screw 502 is rotationally connected with the rotary groove 501, so that the screw 502 is continuously screwed into the spiral groove 508 to complete the connection of the two adjacent main bridge frames 1, and after the screw 502 is screwed into the spiral groove 508, at this time, because the first magnetic block 506 on one side of the connecting rod 505 in the screw 502 is attracted by the second magnetic block 511 on the second main bridge frame 1, the connecting rod 505 is driven to enter the connecting groove 509 on one side of the spiral groove 508, and when the distance between the side bridge frames 403 on two sides of the main bridge frame 1 is short, the cable in the main bridge frame 1 is heavy, at this time, the distance between the first magnetic block 506 and the second magnetic block 511 is close, therefore, the first magnetic block 506 is attracted by the second magnetic block 511 to be large, the connecting rod 505 can be inserted into the deep position of the connecting groove 509, connection between the two main bridges 1 is tight, after the side bridges 403 on the two main bridges 1 are contacted, the clamping block 6 on one side of one side bridge 403 is inserted into the clamping groove 7 on one side of the other side bridge 403 to complete clamping, the bolt connecting plates 8 of the two contacted side bridges 403 are fixed by using bolts at the moment, when a long cable bridge is needed, the length of the whole cable bridge is adjusted by adjusting the length of the main bridges 1 at two ends, the length of the cable bridge reaches the needed length, the main bridge 1 does not need to be cut, and the installation simplicity is improved.

Fourth embodiment, on the basis of the third embodiment, the heat dissipation assembly 9 includes a motor 901 installed on one side of the middle reinforcing rib 2, a friction roller 902 is installed at the bottom end of an output shaft of the motor 901, an output rod 903 is installed at the bottom end of the friction roller 902, a first helical gear 904 is installed at the bottom end of the output rod 903, a second helical gear 905 is engaged and connected to the bottom end of the first helical gear 904, a rotating rod 906 is installed inside the second helical gear 905, transmission gears 907 are symmetrically installed at two ends of the rotating rod 906, a belt 908 is engaged and connected to the outer side of the transmission gears 907, a rotating gear 909 is further engaged and connected to the inner side of the belt 908, a fan blade bar 910 is installed on one side of the rotating gear 909, the fan blade bar 910 is rotatably connected to the inside of the air outlet groove 915, the air outlet groove 915 is symmetrically opened on one side of 1, a heat dissipation groove 916 is symmetrically opened on the other side of 1, and a heat dissipation groove 916 is also opened on one side of 403;

friction plates 911 are symmetrically arranged on two sides of the friction roller 902, friction plate springs 912 are symmetrically arranged on one side of each friction plate 911, a side plate 913 is arranged on one side of each friction plate spring 912, a connecting spring 914 is arranged on one side of each side plate 913, one side of each connecting spring 914 is fixedly connected with one side of the corresponding friction plate 403, the two friction plates 911 are different in height, the friction plate 911 on one side of the friction roller 902 is connected with the side plate 913 on the other side of the friction roller 902 through the friction plate springs 912, and the friction plates 911 are tightly attached to the outer wall of the friction roller 902;

the side bridge frame 403 is clamped with one side of the friction roller 902 through the connecting spring 914, the side plate 913, the friction plate spring 912 and the friction plate 911, so that the side bridge frame 403 is indirectly connected with the middle reinforcing rib 2, so that the installation of the side bridge frame is more stable, after the motor 901 is electrified, the output shaft of the motor 901 rotates to drive the friction roller 902 and the output rod 903 to rotate, the first bevel gear 904 at the bottom end of the output rod 903 is meshed with the second bevel gear 905, the rotating rod 906 is installed inside the second bevel gear 905, so that the motor 901 drives the rotating rod 906 to rotate, the transmission gears 907 at two ends of the rotating rod 906 drive the rotating gears 909 to rotate through the belt 908, as the rotating gears 909 are fixedly connected with the fan blade bars 910, and the fan blade bars 910 are rotatably connected with the air outlet groove 915, so that the motor 901 drives the fan blade bars 910 to rotate, and the heat in the main bridge frame 1 is discharged from the heat dissipation groove 916 at the other side of the main bridge frame 1, the heat dissipation speed in the main bridge frame 1 is increased, meanwhile, when the number of cables in the main bridge frame 1 is large, the side bridge frame 403 needs to be adjusted to move towards one side of the friction plate spring 912 at the moment, after the side bridge frame 403 moves towards the side of the friction plate spring 2, the distance between the side bridge frame 403 and the friction roller 902 is reduced at the moment, so that the lengths of the connecting spring 914 and the friction plate spring 912 are reduced, the elastic force of the friction plate 911 on the friction plate spring 912 is reduced, the pressure of the friction plate 911 on the surface of the friction roller 902 is reduced, the rotation resistance of the friction plate 911 on the friction roller 902 is reduced, the rotation speed of the output rod 903 is increased at the moment, the rotation speed of the driving fan blade rod 910 is increased, and when the number of cables is large, the heat dissipation efficiency in the main bridge frame 1 is increased.

It is noted that, herein, relational terms such as first and second, and the like may be 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. A lightweight cable bridge comprises a main bridge (1), and is characterized in that: the outer wall of the main bridge frame (1) is provided with a middle reinforcing rib (2), the bottom wall of the main bridge frame (1) is symmetrically and equidistantly provided with first heat dissipation holes (3), two sides of the middle reinforcing rib (2) are symmetrically provided with side bridge frame assemblies (4), and a heat dissipation assembly (9) is arranged inside the middle reinforcing rib (2);

side bridge frame subassembly (4) are seted up in spout (401) of main crane span structure (1) both sides including the symmetry, the outside sliding connection of spout (401) has side bridge frame (403), second louvre (404) have been seted up to the top equidistance of side bridge frame (403), U type groove (408) have been seted up to the inside of side bridge frame (403), the internally mounted of U type groove (408) has U template (409), stopper (410) are installed to the equidistance on the lower roof of U template (409), bottom spring (411) are installed to the bottom equidistance of U template (409).

2. A lightweight cable tray as defined in claim 1, wherein: the top of U type groove (408) runs through to the outside of side crane span structure (403), and the top of U template (409) is located the outside of side crane span structure (403), and the shape of stopper (410) is the same with the shape of first louvre (3), stopper (410) and first louvre (3) joint.

3. A lightweight cable tray as defined in claim 2, wherein: install connecting plate (405) on the lower roof of side crane span structure (403), layer board (406) are installed on the top of connecting plate (405), and intercommunication groove (407) have been seted up to the top equidistance of layer board (406), and inside connecting plate (405) and layer board (406) peg graft in T type groove (402), T type groove (402) symmetry are seted up inside main crane span structure (1), and the internally mounted of side crane span structure (403) has coupling assembling (5).

4. A lightweight cable tray as defined in claim 3, wherein: coupling assembling (5) are seted up turn trough (501) in one of them side crane span structure (403) one side including the symmetry, the inside rotation of turn trough (501) is connected with screw rod (502), the externally mounted of screw rod (502) has stop gear (503), mounting groove (504) have been seted up to the inside of screw rod (502), transverse spring (507) are installed to one side of mounting groove (504), connecting rod (505) are installed to one side of transverse spring (507), first magnetic path (506) are installed to one side of connecting rod (505), the spacing groove has been seted up at the middle part of turn trough (501), stop gear (503) are installed in the spacing inslot portion, dial turn trough (510) have been seted up to one side of spacing groove, dial turn trough (510) and run through to the outside of side crane span structure (403), another spiral groove (508) have been seted up to one side symmetry of side crane span structure (403), connecting groove (509) have been seted up to one side of spiral groove (508).

5. A lightweight cable tray as defined in claim 4, wherein: one side of the connecting groove (509) is provided with a second magnetic block (511), the second magnetic block (511) is installed on one side of the middle reinforcing rib (2), and the connecting groove (509) is matched with the connecting rod (505).

6. A lightweight cable tray as defined in claim 1, wherein: the heat dissipation assembly (9) comprises a motor (901) arranged on one side of a middle reinforcing rib (2), a friction roller (902) is arranged at the bottom end of an output shaft of the motor (901), an output rod (903) is arranged at the bottom end of the friction roller (902), a first helical gear (904) is arranged at the bottom end of the output rod (903), a second helical gear (905) is meshed and connected with the bottom end of the first helical gear (904), a rotating rod (906) is arranged inside the second helical gear (905), transmission gears (907) are symmetrically arranged at two ends of the rotating rod (906), a belt (908) is meshed and connected with the outer side of the transmission gears (907), a rotating gear (909) is further meshed and connected with the inner side of the belt (908), a fan blade rod (910) is arranged on one side of the rotating gear (909), the fan blade rod (910) is rotatably connected inside an air outlet groove (915), the air outlet groove (1) is symmetrically arranged on one side of the air outlet groove (1), (1) the other side of the heat sink is symmetrically provided with heat dissipation grooves (916), and one side of the heat sink (403) is also provided with heat dissipation grooves (916).

7. A lightweight cable tray as defined in claim 6, wherein: friction plates (911) are symmetrically arranged on two sides of the friction roller (902), friction plate springs (912) are symmetrically arranged on one side of each friction plate (911), a side plate (913) is arranged on one side of each friction plate spring (912), a connecting spring (914) is arranged on one side of each side plate (913), and one side of each connecting spring (914) is fixedly connected with one side of each connecting spring (403).

8. A lightweight cable tray as defined in claim 7, wherein: the two friction plates (911) are different in height, the friction plate (911) on one side of the friction roller (902) is connected with the side plate (913) on the other side of the friction roller (902) through a friction plate spring (912), and the friction plate (911) is tightly attached to the outer wall of the friction roller (902).

9. A lightweight cable tray as defined in claim 1, wherein: one side of one of them side crane span structure (403) equidistance is installed fixture block (6), and draw-in groove (7) have been seted up to one side equidistance of another side crane span structure (403), and bolt connection board (8) are installed to the bilateral symmetry of fixture block (6) and draw-in groove (7) looks adaptation, side crane span structure (403).