Combined ladder type cable bridge

Abstract

The utility model discloses a combined ladder type cable bridge, relates to the technical field of cable laying and protection structures, and aims to solve the technical problem that the current combined ladder type cable bridge has poor cable laying and protection effects, the combined ladder type cable bridge comprises two groups of side plates, and a plurality of groups of transverse plates are arranged between the two groups of side plates at equal intervals. According to the utility model, the two groups of rectangular mounting racks are arranged on the transverse plate, and the plurality of groups of roll shafts are rotationally arranged between the two groups of rectangular mounting racks, so that when a cable is subjected to telescopic displacement due to thermal expansion and cold contraction, the roll shafts can correspondingly rotate, and the previous sliding friction can be converted into rolling friction; and the rolling friction coefficient is far lower than the sliding friction coefficient, so that the abrasion of the cable caused by thermal expansion and cold contraction can be obviously improved, the bottom layer cable directly contacted with the transverse plate can be greatly and effectively protected, and the better laying and protection effects on the cable are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cable laying and protection structures, and more specifically, to a combined ladder-type cable tray. Background Art

[0002] A combined ladder-type cable tray is usually a ladder-type structure composed of two groups of side plates and several groups of cross plates. It has the advantages of light weight, low cost, unique shape, convenient installation, good heat dissipation and air permeability. It is suitable for laying cables with a generally larger diameter, suitable for laying high- and low-voltage power cables, and can effectively achieve the laying and protection effects of cables in buildings.

[0003] For the existing combined ladder-type cable tray, if cables are laid in an environment with large changes in cold and heat temperature differences, after the cables are laid in the cable tray, affected by the temperature difference changes, the cables will have large thermal expansion and contraction changes. At this time, the cables will have frequent telescopic displacements. During this process, the bottom cables will have frequent sliding friction with the cross plates of the cable tray. In the long run, the bottom cables are very easy to be damaged. Therefore, the combined ladder-type cable tray has a poor laying and protection effect on the cables. In view of this, we propose a combined ladder-type cable tray. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art, adapt to the actual needs, and provide a combined ladder-type cable tray to solve the technical problem that the current combined ladder-type cable tray has a poor laying and protection effect on cables.

[0005] To solve the above technical problems, the utility model provides the following technical solution: A combined ladder-type cable tray includes two groups of side plates, and several groups of cross plates are arranged at equal intervals between the two groups of side plates. Rectangular mounting frames are symmetrically arranged on both sides of the top of the cross plates. Several mounting blocks are movably arranged in the rectangular mounting frames. A roller shaft is rotatably arranged between the mounting blocks in the two groups of rectangular mounting frames.

[0006] The roller shaft is composed of several cylindrical sections. A V-shaped groove is arranged around the cylindrical section. A partition frame is arranged below the roller shaft. The partition frame is slidably arranged between the two groups of rectangular mounting frames. Several partition grooves are arranged at equal intervals on the top of the partition frame. The cylindrical section is rotatably arranged in the corresponding partition groove.

[0007] The utility model provides two groups of rectangular mounting brackets arranged on a cross plate, and a number of roller shafts are rotatably arranged between the two groups of rectangular mounting brackets. Therefore, when laying and protecting a cable, according to requirements, personnel can adaptively adjust the distance between the roller shafts between the two groups of rectangular mounting brackets, and then the cable will directly rest on the roller shafts, avoiding direct contact between the cable and the cross plate. Therefore, when the cable expands and contracts due to thermal expansion and contraction and undergoes telescopic displacement, the roller shafts will rotate correspondingly, thereby converting the previous sliding friction into rolling friction. Since the rolling friction coefficient is much lower than the sliding friction coefficient, the wear of the cable caused by thermal expansion and contraction can be significantly reduced. Therefore, the bottom layer of the cable in direct contact with the cross plate can be effectively protected, thus achieving a better laying and protecting effect on the cable. The roller shafts of the utility model are composed of a number of cylindrical segments, and a partition frame is arranged below the roller shafts. Then, the cylindrical segments are rotatably arranged in the partition grooves of the partition frame in a separate and separated form, so that each cylindrical segment can rotate in cooperation with the corresponding cable and will not conflict with the thermal expansion and contraction of other cables. Moreover, a V-shaped groove is formed in each cylindrical segment for one week, and the included angle of the V-shaped groove is 90 degrees to 120 degrees. When the cable passes through the V-shaped groove, the V-shaped groove forms a wrap on the cable through the inclined surfaces on both sides, dispersing the contact pressure to the inclined surfaces on both sides, increasing the contact area, more evenly dispersing the pressure, reducing the pressure, and the V-shaped groove with an included angle of 90 degrees to 120 degrees has better stability and self-centering ability for the cable. When the cable expands and contracts due to thermal expansion and contraction, it is not easy to shift and uneven wear occurs. Therefore, the wear generated when the cable expands and contracts due to thermal expansion and contraction can be further reduced, thereby achieving better laying and protecting of the cable.

[0008] Preferably, the roller shaft is made of a nylon matrix, and a PTFE coating is coated on the nylon matrix.

[0009] Preferably, rectangular limit strips are arranged at the bottoms of the opposite sides of the two groups of rectangular mounting brackets, and slots are arranged at both ends of the partition frame, and the slots are inserted into the rectangular limit strips.

[0010] Preferably, T-shaped limit strips are arranged at the inner bottoms of the rectangular mounting brackets, T-shaped limit grooves are arranged at the bottoms of the mounting blocks, and the T-shaped limit strips penetrate through the T-shaped limit grooves.

[0011] Preferably, adjusting screws are rotatably arranged on both sides inside the rectangular mounting brackets, a positioning plate is placed inside the rectangular mounting brackets, and the adjusting screws penetrate through the positioning plate.

[0012] Preferably, a rack is arranged at the bottom of the positioning plate, and a tooth groove is arranged at the top of the mounting block.

[0013] Preferably, the included angle of the V-shaped groove is 90 degrees to 120 degrees.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] 1. The utility model is provided with two groups of rectangular mounting frames on the cross plate, and several groups of rollers are rotatably arranged between the two groups of rectangular mounting frames. Therefore, when laying and protecting the cable, according to needs, the operator can adaptively adjust the distance between the rollers between the two groups of rectangular mounting frames, and then the cable will directly fall on the rollers, avoiding direct contact between the cable and the cross plate. Therefore, when the cable undergoes telescopic displacement due to thermal expansion and contraction, the rollers will rotate correspondingly, thereby transforming the previous sliding friction into rolling friction. Since the rolling friction coefficient is much lower than the sliding friction coefficient, the wear of the cable caused by thermal expansion and contraction can be significantly reduced. Therefore, the bottom layer cable in direct contact with the cross plate can be effectively protected, thus achieving better laying and protection effects on the cable, solving the technical problem that the current combined ladder-type cable tray has poor laying and protection effects on the cable. Therefore, the utility model has better laying and protection effects on the cable.

[0016] 2. The roller of the utility model is composed of several groups of cylindrical segments, and a partition frame is arranged below the roller. Then, the cylindrical segments are rotatably arranged in the partition grooves of the partition frame in a separately separated form, so that each group of cylindrical segments can rotate in cooperation with the corresponding cable without conflicting with the thermal expansion and contraction of other cables. And a V-shaped groove is opened around each group of cylindrical segments, and the included angle of the V-shaped groove is 90 degrees to 120 degrees. The cable passes through the V-shaped groove, and the V-shaped groove forms a wrap on the cable through the inclined surfaces on both sides, dispersing the contact pressure to the inclined surfaces on both sides, increasing the contact area, more evenly dispersing the pressure, reducing the pressure, and the V-shaped groove with an included angle of 90 degrees to 120 degrees has better stability and self-centering ability for the cable. When the cable expands and contracts thermally, it is not easy to shift and cause uneven wear. Therefore, the wear generated when the cable expands and contracts thermally can be further reduced, thereby realizing better laying and protection of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the first overall structural schematic diagram of the utility model;

[0018] Figure 2 is the second overall structural schematic diagram of the utility model;

[0019] Figure 3 is the schematic diagram of the cross plate of the utility model;

[0020] Figure 4 is the structural schematic diagram of the rectangular mounting frame of the utility model;

[0021] Figure 5 is the structural schematic diagram of the roller of the utility model.

[0022] Description of the reference numerals in the drawings:

[0023] 1. Side plate; 2. Cross plate; 3. Rectangular mounting bracket; 301. T-shaped limiting strip; 302. Rectangular limiting strip; 303. Adjusting screw; 304. Positioning plate; 4. Mounting block; 401. T-shaped limiting groove; 5. Roller shaft; 501. Cylindrical section; 502. V-shaped groove; 6. Partition frame; 601. Partition groove; 602. Insert slot. Detailed implementation manner

[0024] As Figures 1 to 5 shown, a combined ladder-type cable tray involved in the present utility model includes two groups of side plates 1. A number of groups of cross plates 2 are arranged at equal intervals between the two groups of side plates 1. Rectangular mounting brackets 3 are symmetrically arranged on both sides of the top of the cross plates 2. A number of groups of mounting blocks 4 are movably arranged in the rectangular mounting brackets 3. A roller shaft 5 is rotatably arranged between the mounting blocks 4 in the two groups of rectangular mounting brackets 3;

[0025] The two groups of side plates 1 and a number of groups of cross plates 2 are combined to form a ladder-type cable tray. When laying and protecting cables, according to needs, personnel can adaptively adjust the distance between the roller shafts 5 through the mounting blocks 4 in the two groups of rectangular mounting brackets 3. After the cable is laid into the cable tray, the cable will directly fall on the roller shafts 5, avoiding direct contact between the cable and the cross plates 2. Therefore, when the cable undergoes telescopic displacement due to thermal expansion and contraction, the roller shafts 5 will rotate correspondingly, thereby changing the previous sliding friction into rolling friction. Since the rolling friction coefficient is much lower than the sliding friction coefficient, the wear of the cable caused by thermal expansion and contraction can be significantly improved. Therefore, the bottom layer cables in direct contact with the cross plates 2 can be effectively protected, thus achieving a better laying and protecting effect on the cables.

[0026] Specifically, the roller shaft 5 is made of a nylon matrix, and a PTFE coating is coated on the nylon matrix; the roller shaft 5 with a nylon matrix plus a PTFE coating has a smaller friction coefficient, and the moving resistance during the thermal expansion and contraction of the cable is reduced.

[0027] Furthermore, a T-shaped limiting strip 301 is arranged at the bottom inside the rectangular mounting bracket 3, and a T-shaped limiting groove 401 is arranged at the bottom of the mounting block 4. The T-shaped limiting strip 301 penetrates through the T-shaped limiting groove 401; with the cooperation of the T-shaped limiting strip 301 and the T-shaped limiting groove 401, the mounting block 4 can stably slide inside the rectangular mounting bracket 3.

[0028] Still further, adjusting screws 303 are rotatably arranged on both sides inside the rectangular mounting bracket 3. A positioning plate 304 is placed inside the rectangular mounting bracket 3, and the adjusting screws 303 penetrate through the positioning plate 304; a rack is arranged at the bottom of the positioning plate 304, and a tooth groove is arranged at the top of the mounting block 4; after the position of the mounting block 4 inside the rectangular mounting bracket 3 is adjusted, the adjusting screw 303 can be screwed to drive the positioning plate 304 to descend, and then the rack of the positioning plate 304 is engaged with the tooth groove of the mounting block 4 to fix the mounting block 4.

[0029] In an embodiment of the present utility model, the roller shaft 5 is composed of a plurality of sets of cylindrical segments 501. A V-shaped groove 502 is arranged around the cylindrical segment 501. A partition frame 6 is arranged below the roller shaft 5. The partition frame 6 is slidably arranged between two sets of rectangular mounting frames 3. A plurality of sets of partition grooves 601 are equidistantly arranged at the top of the partition frame 6. The cylindrical segment 501 is rotatably arranged in the corresponding partition groove 601; the included angle of the V-shaped groove 502 is 90 degrees to 120 degrees;

[0030] The cylindrical segments 501 are rotatably arranged in the partition grooves 601 of the partition frame 6 in a separately separated form. Thus, each set of cylindrical segments 501 can rotate in cooperation with the corresponding cable, without conflicting with the thermal expansion and contraction of other cables. And the cable passes through the V-shaped groove 502. The V-shaped groove 502 forms a wrap on the cable through the inclined surfaces on both sides, dispersing the contact pressure to the inclined surfaces on both sides, increasing the contact area, more evenly dispersing the pressure, reducing the pressure. Moreover, the V-shaped groove 502 with an included angle of 90 degrees to 120 degrees has better stability and self-centering ability for the cable. When the cable expands and contracts thermally, it is not easy to shift and cause uneven wear. Therefore, the wear generated when the cable expands and contracts thermally can be further reduced, so as to better lay and protect the cable.

[0031] Specifically, rectangular limit strips 302 are arranged at the bottoms of the opposite sides of the two sets of rectangular mounting frames 3. Slots 602 are arranged at both ends of the partition frame 6, and the slots 602 are inserted on the rectangular limit strips 302; the cooperation of the rectangular limit strips 302 and the slots 602 facilitates the free sliding of the partition frame 6.

[0032] Working principle: This embodiment provides a combined ladder-type cable tray. First, the two sets of side plates 1 and a plurality of sets of cross plates 2 are combined to form a ladder-type cable tray. When laying and protecting the cable, as needed, personnel can adaptively adjust the distance between the roller shafts 5 through the mounting blocks 4 in the two sets of rectangular mounting frames 3. After the cable is laid into the cable tray, the cable will directly fall on the roller shafts 5, avoiding direct contact between the cable and the cross plates 2. Therefore, when the cable undergoes telescopic displacement due to thermal expansion and contraction, the roller shafts 5 will rotate correspondingly, thereby transforming the previous sliding friction into rolling friction. Since the rolling friction coefficient is much lower than the sliding friction coefficient, the wear of the cable caused by thermal expansion and contraction can be significantly improved. Therefore, the bottom cables in direct contact with the cross plates 2 can be effectively protected, thus achieving a better laying and protecting effect on the cable;

[0033] Secondly, the cylindrical section 501 is rotatably arranged in the partition groove 601 of the partition frame 6 in a separately separated form, so that each group of cylindrical sections 501 can rotate in cooperation with the corresponding cable, without conflicting with the thermal expansion and contraction of other cables. Moreover, the cable passes through the V-shaped groove 502, and the V-shaped groove 502 forms a wrap on the cable through the inclined surfaces on both sides, dispersing the contact pressure to the inclined surfaces on both sides. The contact area increases, the pressure can be more evenly dispersed, and the pressure is reduced. In addition, the V-shaped groove 502 with a wrap angle of 90 degrees to 120 degrees has better stability and self-centering ability for the cable. When the cable expands and contracts thermally, it is not easy to shift and uneven wear occurs. Therefore, the wear generated during the thermal expansion and contraction of the cable can be further reduced, and thus better laying and protection of the cable can be achieved.

[0034] The embodiments disclosed in the present invention are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. A combined ladder-type cable tray, characterized in that, It includes two groups of side plates (1), and a number of groups of cross plates (2) are arranged at equal intervals between the two groups of side plates (1). Rectangular mounting frames (3) are symmetrically arranged on both sides of the top of the cross plate (2). A number of mounting blocks (4) are movably arranged in the rectangular mounting frames (3). A roller shaft (5) is rotatably arranged between the mounting blocks (4) in the two rectangular mounting frames (3). The roller shaft (5) is composed of a number of cylindrical segments (501). V-shaped grooves (502) are arranged around the cylindrical segment (501). A partition frame (6) is arranged below the roller shaft (5). The partition frame (6) is slidably arranged between the two rectangular mounting frames (3). A number of partition grooves (601) are arranged at equal intervals on the top of the partition frame (6). The cylindrical segment (501) is rotatably arranged in the corresponding partition groove (601).

2. The combined ladder-type cable tray according to claim 1, characterized in that, The roller shaft (5) is made of a nylon matrix, and a PTFE coating is coated on the nylon matrix.

3. The combined ladder-type cable tray according to claim 1, characterized in that, Rectangular limit strips (302) are arranged at the bottoms of the opposite sides of the two rectangular mounting frames (3). Slots (602) are arranged at both ends of the partition frame (6), and the slots (602) are inserted on the rectangular limit strips (302).

4. A combined ladder-type cable tray according to claim 1, characterized in that, T-shaped limit strips (301) are arranged at the bottoms inside the rectangular mounting frames (3). T-shaped limit grooves (401) are arranged at the bottoms of the mounting blocks (4). The T-shaped limit strips (301) penetrate through the T-shaped limit grooves (401).

5. The combined ladder-type cable tray according to claim 1, characterized in that, Adjusting screws (303) are rotatably arranged on both sides inside the rectangular mounting frames (3). A positioning plate (304) is placed inside the rectangular mounting frames (3), and the adjusting screws (3) penetrate through the positioning plate (304).

6. The combined ladder-type cable tray according to claim 5, characterized in that, A rack is arranged at the bottom of the positioning plate (304), and a tooth groove is arranged at the top of the mounting block (4).

7. The combined ladder-type cable tray according to claim 1, characterized in that, The included angle of the V-shaped groove (502) is 90 degrees to 120 degrees.

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