Connecting structure of cable bridge

Abstract

The utility model relates to the technical field of cable bridges, and discloses a cable bridge connecting structure which comprises a first cable bridge and a second cable bridge, a top cover is installed on the outer surface of the first cable bridge in an inserted mode, a first connecting assembly is arranged between the first cable bridge and the second cable bridge, and a second connecting assembly is arranged between the first cable bridge and the second cable bridge. A second connecting assembly is arranged at the end, close to the top cover, of the first connecting assembly, and a limiting assembly is fixedly installed on the outer surface of the first connecting assembly. According to the connecting structure of the cable bridge, through cooperation of the first connecting box and the second connecting box, corresponding angles can be adjusted according to different use environments, the adaptability is high, through cooperation of a first limiting block, a first limiting groove, a guide rod and a limiting sleeve, rapid limiting of the first connecting box and the second connecting box can be achieved, and the connecting structure is convenient to use. The angle between the first connecting box and the second connecting box is not prone to change, stability is high, through the design of the limiting assembly, mounting and dismounting of the first cable bridge are facilitated, and mounting efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of cable tray technology, specifically to a connection structure for cable trays. Background Technology

[0002] A support system for supporting, protecting, and managing cables and wires is called a cable tray. It is usually made of metal, plastic, or other durable materials. It is widely used in buildings, industrial facilities, and other places to ensure the safety, aesthetics, and reliability of cable wiring. Cable trays are widely used in engineering, not only for power cables, but also for different types of cables such as communication cables and network cables. Its advantages include a wide variety of types, wide application, high strength, lightweight structure, low cost, simple construction, flexible wiring, standardized installation, and beautiful appearance.

[0003] Chinese Utility Model Patent Publication No. CN 221806410 U discloses a quick-connect structure for a trough-type cable tray. This quick-connect structure connects a U-shaped threaded rod to a first and second cable tray via two insertion slots. Two nuts are then rotated to a fixed position at the two lateral ends of the U-shaped threaded rod. Two positioning rods are then rotated through connecting slots onto two fixing posts to mate with the front and back of the first cable tray. A fastening bolt rotates within the two first threaded slots (a group of two) to fix the positioning rods to the first cable tray. This provides a double, quick, and stable connection between the first and second cable trays, preventing detachment during use. However, while this quick-connect structure connects the first and second cable trays, the use of bolts results in slow installation, low efficiency, and the lack of an angle adjustment mechanism, making it unsuitable for various working environments. Its low adaptability and poor practicality hinder its widespread adoption. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a connection structure for cable trays. It can effectively solve the problems in the prior art that although the first cable tray and the second cable tray can be connected, the connection is made with bolts, which is slow and has low installation efficiency. In addition, the angle adjustment mechanism is not designed, which makes it unsuitable for different working environments, with low adaptability, poor practicality, and difficulty in promotion and use.

[0005] The technical solution adopted by this utility model is: a connection structure for a cable tray, including a first cable tray and a second cable tray. A top cover is inserted and installed on the outer surface of the first cable tray. A first connecting component is provided between the first cable tray and the second cable tray. A second connecting component is provided at one end of the first connecting component near the top cover. A limiting component is fixedly installed on the outer surface of the first connecting component. A ventilation opening is provided on the side of the first cable tray near the limiting component.

[0006] Preferably, the first connecting component includes a fixed shaft, a first connecting box, a second connecting box, a stop block, a first guide groove, a first guide block, a fixed disc, a movable groove, a guide rod, a first limiting groove, a connecting rod, a first limiting block, and a limiting sleeve. The first connecting box and the second connecting box are rotatably mounted on the outer surface of the fixed shaft, and the stop block is fixedly mounted on the inner surface of both the first connecting box and the second connecting box. The first cable tray and the second cable tray have the same structure. The first cable tray and the first connecting box are plugged in. The cross-section of the stop block is U-shaped, and the height and width of the stop block are the same as the height and width of the first cable tray.

[0007] Through the above technical solution, by cooperating with the first cable tray and the first connecting box, when in use, the operator inserts the first cable tray into the inside of the first connecting box, so that the first cable tray abuts against the stop block, which can realize the quick positioning of the first cable tray and facilitate subsequent fixing.

[0008] Preferably, the connecting box one has a guide groove one on the side near the connecting box two, the connecting box two has a guide block one fixedly installed at the end near the connecting box one, the two ends of the fixed shaft have fixed plates fixedly installed, the fixed plate has a movable groove on the side away from the connecting box one, the connecting box two has a guide rod fixedly installed on the side near the fixed plate, the fixed plate has a limit groove one on the side away from the connecting box one, the fixed plate has a connecting rod on the side away from the connecting box one, the connecting rod has a limit block one and a limit sleeve fixedly installed on the side near the fixed plate, the guide block one and the guide groove one are plugged in, and the guide rod and the movable groove are slidably connected.

[0009] The second connecting component includes a first cover, a second cover, a second guide groove, and a second guide block. The second cover is rotatably mounted on the outer surface of the first cover. The second guide groove is provided on the side of the first cover near the second cover. The second guide block is fixedly mounted on the side of the second cover near the first cover. The second guide block and the second guide groove are inserted into each other.

[0010] Through the above technical solution, by cooperating with connecting box one and connecting box two, during use, the operator rotates connecting box two, causing guide block one to insert into guide groove one, which enables rapid positioning of connecting box one and connecting box two. The corresponding angle can be adjusted for different usage environments, exhibiting high adaptability. Simultaneously, the guide rod slides inside the movable groove, playing a guiding role and improving overall stability.

[0011] Preferably, the limiting block and the limiting groove are connected by an insertion joint, and the guide rod and the limiting sleeve are connected by an insertion joint.

[0012] By using the above technical solution, after adjusting the first and second connecting boxes to a suitable angle, the first limiting block is inserted into the first limiting groove, and the guide rod is inserted into the inside of the limiting sleeve, which can quickly limit the connection between the first and second connecting boxes. During use, the angle between the first and second connecting boxes is not easily changed, and the stability is high.

[0013] Preferably, the first box cover is adapted to the first connecting box, and the second box cover is adapted to the second connecting box.

[0014] Through the above technical solution and the design of the second connecting component, after the first connecting box and the second connecting box are quickly positioned, the second cover can be rotated to make the first and second covers fit with the first and the second connecting boxes. After adjustment, the first and second covers are placed on top of the first and the second connecting boxes to prevent dust from accumulating inside the first and the second connecting boxes and improve the service life of the cables inside the first and the second connecting boxes.

[0015] Preferably, the limiting assembly includes a connecting block one, a sliding rod one, a movable plate, a spring one, a sliding rod two, a movable sleeve, a spring two, a limiting block two, a pull rod, a limiting block three, a connecting block two, and a limiting groove two. The sliding rod one is fixedly installed on the inner surface of the connecting block one, the movable plate is slidably connected to the outer surface of the sliding rod one, and the spring one is fixedly installed on the outer surface of the movable plate. The sliding rod two is fixedly installed on the inner surface of the connecting block one, the movable sleeve is slidably connected to the outer surface of the sliding rod two, and the spring two is fixedly installed on the outer surface of the movable sleeve. A limiting block two is fixedly installed on the inner surface of the movable sleeve, and a pull rod is fixedly installed on the outer surface of the movable sleeve. A limiting block three is fixedly installed on the side of the movable plate near the limiting block two. A connecting block two is fixedly installed on the side of the first cable tray near the vent. A limiting groove two is formed on the side of the connecting block two near the connecting block one. The end of the movable plate is inclined. The limiting block three is adapted to the limiting groove two. The cross-section of the limiting block three is trapezoidal. The cross-section of the limiting groove two is L-shaped.

[0016] Through the above technical solution, during the process of inserting the first cable tray into the connection box, when the limiting block three contacts the connecting block two, the spring one contracts, causing the moving plate to move inward. While quickly positioning the first cable tray, the spring one rebounds, pushing the limiting block three into the limiting groove two, thus achieving rapid fixation of the first cable tray. When it is necessary to disassemble the first cable tray, the worker pulls the lever, the limiting block two squeezes the moving plate, causing the moving plate to move inward, thereby causing the limiting block three to move inward. Then, the limiting block three is pulled out of the limiting groove two, thus achieving rapid disassembly of the first cable tray.

[0017] Preferably, the ventilation openings are provided in multiple identical manner, and the multiple ventilation openings are distributed at equal intervals.

[0018] Through the above technical solution, the design of the ventilation openings allows air to enter the interior of the first cable tray, cooling the cables inside and facilitating heat dissipation. The design of multiple ventilation openings further enhances the overall heat dissipation effect and extends the service life of the cables.

[0019] Compared with the prior art, the present invention provides a connection structure for cable trays, which has the following advantages:

[0020] 1. The connection structure of this cable tray, through the cooperation of connection box one and connection box two, can adjust the corresponding angle for different usage environments, with high adaptability. At the same time, the guide rod slides inside the movable groove, playing a guiding role and improving the overall stability. Through the cooperation of limit block one, limit groove one, guide rod and limit sleeve, connection box one and connection box two can be quickly limited, making the angle between connection box one and connection box two less likely to change, with high stability.

[0021] 2. The connection structure of this cable tray, through the design of the limiting component, facilitates the installation and disassembly of the first cable tray, resulting in high installation efficiency. Through the design of the ventilation opening, air enters the interior of the first cable tray from the ventilation opening to cool the cables inside the first cable tray, facilitating cable heat dissipation. The design of multiple ventilation openings further enhances the overall heat dissipation effect and also improves the service life of the cables. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0024] Figure 3 This is a schematic diagram of the installation structure of the connecting component of this utility model. Figure 1 ;

[0025] Figure 4 This is a schematic diagram of the installation structure of the connecting component of this utility model. Figure 2 ;

[0026] Figure 5 This is a schematic diagram of the installation structure of the second connecting component of this utility model;

[0027] Figure 6 This is a schematic diagram of the installation structure of the limiting component of this utility model.

[0028] The components include: 1. First cable tray; 2. Second cable tray; 3. Top cover; 4. Connecting assembly one; 401. Fixed shaft; 402. Connecting box one; 403. Connecting box two; 404. Stop block; 405. Guide groove one; 406. Guide block one; 407. Fixed plate; 408. Movable groove; 409. Guide rod; 410. Limiting groove one; 411. Connecting rod; 412. Limiting block one; 413. Limiting sleeve; 5. Connecting assembly. 2; 501, Box lid one; 502, Box lid two; 503, Guide groove two; 504, Guide block two; 6, Limiting assembly; 601, Connecting block one; 602, Slide rod one; 603, Moving plate; 604, Spring one; 605, Slide rod two; 606, Moving sleeve; 607, Spring two; 608, Limiting block two; 609, Pull rod; 610, Limiting block three; 611, Connecting block two; 612, Limiting groove two; 7, Ventilation opening. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1: As Figure 1-6 As shown, the present invention provides a connection structure for a cable tray, including a first cable tray 1 and a second cable tray 2. A top cover 3 is inserted and installed on the outer surface of the first cable tray 1. A connecting component 4 is provided between the first cable tray 1 and the second cable tray 2. A connecting component 5 is provided at one end of the connecting component 4 near the top cover 3. A limiting component 6 is fixedly installed on the outer surface of the connecting component 4. A ventilation opening 7 is provided on the side of the first cable tray 1 near the limiting component 6.

[0031] Specifically, the connecting component 4 includes a fixed shaft 401, a connecting box 402, a connecting box 403, a stop block 404, a guide groove 405, a guide block 406, a fixed plate 407, a movable groove 408, a guide rod 409, a limiting groove 410, a connecting rod 411, a limiting block 412, and a limiting sleeve 413. The connecting box 402 and the connecting box 403 are rotatably mounted on the outer surface of the fixed shaft 401. The stop block 404 is fixedly mounted on the inner surface of both the connecting box 402 and the connecting box 403. The first cable tray 1 and the second cable tray 2 have the same structure. The first cable tray 1 and the connecting box 402 are plugged in. The cross-section of the stop block 404 is U-shaped. The height and width of the stop block 404 are the same as the height and width of the first cable tray 1. The advantage is that, through the cooperation of the first cable tray 1 and the connecting box 402, when in use, the operator inserts the first cable tray 1 into the interior of the connecting box 402, so that the first cable tray 1 abuts against the stop block 404, which can realize the quick positioning of the first cable tray 1 and facilitate subsequent fixing.

[0032] Specifically, a guide groove 405 is provided on the side of connecting box 1 402 near connecting box 2 403. A guide block 406 is fixedly installed on the end of connecting box 2 403 near connecting box 1 402. Fixed discs 407 are fixedly installed on both ends of fixed shaft 401. A movable groove 408 is provided on the side of fixed disc 407 away from connecting box 1 402. A guide rod 409 is fixedly installed on the side of connecting box 2 403 near fixed disc 407. A limit groove 410 is provided on the side of fixed disc 407 away from connecting box 1 402. A connecting rod 411 is provided on the side of fixed disc 407 away from connecting box 1 402. A limit block 412 and a limit sleeve 413 are fixedly installed on the side of connecting rod 411 near fixed disc 407. The guide block 406 and the guide groove 405 are plugged in, and the guide rod 409 and the movable groove 408 are slidably connected. The advantage is that, through the cooperation of connecting box 1 402 and connecting box 2 403, during use, the operator rotates connecting box 2 403, causing guide block 1 406 to insert into guide groove 1 405, which can achieve quick positioning of connecting box 1 402 and connecting box 2 403. The corresponding angle can be adjusted for different usage environments, and the adaptability is high. At the same time, the guide rod 409 slides inside the movable groove 408, which plays a guiding role and improves the overall stability.

[0033] Specifically, the limiting block 412 and the limiting groove 410 are plug-in installed, as are the guide rod 409 and the limiting sleeve 413. The advantage is that after adjusting the connecting box 402 and the connecting box 403 to a suitable angle, inserting the limiting block 412 into the limiting groove 410 and the guide rod 409 into the limiting sleeve 413 allows for quick positioning of the connecting box 402 and the connecting box 403. During use, this prevents the angle between the connecting box 402 and the connecting box 403 from changing easily, resulting in high stability.

[0034] Example 2: Figure 2-6 As shown, this is an improvement on the previous embodiment.

[0035] Specifically, the connecting component 2 5 includes a cover 1 501, a cover 2 502, a guide groove 2 503, and a guide block 2 504. The cover 2 502 is rotatably mounted on the outer surface of the cover 1 501. The guide groove 2 503 is provided on the side of the cover 1 501 near the cover 2 502. The guide block 2 504 is fixedly mounted on the side of the cover 2 502 near the cover 1 501. The guide block 2 504 and the guide groove 2 503 are plugged into each other. The cover 1 501 is adapted to the connecting box 1 402, and the cover 2 502 is adapted to the connecting box 2 403. The advantage is that, through the design of the second connecting component 5, after quickly limiting the connection box 402 and the second connecting box 403, the second cover 502 can be rotated to make the first cover 501 and the second cover 502 fit with the first connecting box 402 and the second connecting box 403. After adjustment, the first cover 501 and the second cover 502 are placed on top of the first connecting box 402 and the second connecting box 403 to prevent dust from accumulating inside the first connecting box 402 and the second connecting box 403, thereby improving the service life of the cables inside the first connecting box 402 and the second connecting box 403.

[0036] Specifically, the limiting component 6 includes a connecting block 601, a sliding rod 602, a movable plate 603, a spring 604, a sliding rod 605, a movable sleeve 606, a spring 607, a limiting block 608, a pull rod 609, a limiting block 610, a connecting block 611, and a limiting groove 612. The sliding rod 602 is fixedly installed on the inner surface of the connecting block 601, and the movable plate 603 is slidably connected to the outer surface of the sliding rod 602. A spring 604 is fixedly installed on the outer surface of the movable plate 603. The sliding rod 605 is fixedly installed on the inner surface of the connecting block 601, and the movable sleeve 606 is slidably connected to the outer surface of the sliding rod 605. The outer surface of the movable sleeve 606... A spring 607 is fixedly installed on the surface of the movable sleeve 606. A limit block 608 is fixedly installed on the inner surface of the movable sleeve 606. A pull rod 609 is fixedly installed on the outer surface of the movable sleeve 606. A limit block 610 is fixedly installed on the side of the movable plate 603 near the limit block 608. A connecting block 611 is fixedly installed on the side of the first cable tray 1 near the ventilation opening 7. A limit groove 612 is opened on the side of the connecting block 611 near the connecting block 601. The end of the movable plate 603 is inclined. The limit block 610 is adapted to the limit groove 612. The cross section of the limit block 610 is trapezoidal. The cross section of the limit groove 612 is L-shaped. The advantage is that during the process of inserting the first cable tray 1 into the connection box 402, when the limiting block 3 610 contacts the connecting block 2 611, the spring 1 604 contracts, causing the moving plate 603 to move inward. While quickly positioning the first cable tray 1, the spring 1 604 rebounds, pushing the limiting block 3 610 into the limiting groove 2 612, thus achieving quick fixation of the first cable tray 1. When it is necessary to disassemble the first cable tray 1, the operator pulls the lever 609, the limiting block 2 608 squeezes the moving plate 603, causing the moving plate 603 to move inward, thereby causing the limiting block 3 610 to move inward. Then, the limiting block 3 610 is pulled out of the limiting groove 2 612, thus achieving quick disassembly of the first cable tray 1.

[0037] Specifically, multiple identical ventilation openings 7 are provided, and these ventilation openings 7 are distributed at equal intervals. The advantage is that, through the design of the ventilation openings 7, air enters the interior of the first cable tray 1 through the ventilation openings 7, cooling the cables inside the first cable tray 1 and facilitating cable heat dissipation. The design of multiple ventilation openings 7 further improves the overall heat dissipation effect and also extends the service life of the cables.

[0038] Working principle: During installation, the operator rotates connecting box 2 403, causing guide block 1 406 to insert into guide groove 1 405, enabling quick positioning of connecting box 1 402 and connecting box 2 403. The angle can be adjusted for different usage environments, offering high adaptability. Simultaneously, guide rod 409 slides within movable groove 408, providing guidance and improving overall stability. After adjusting connecting box 1 402 and connecting box 2 403 to the appropriate angle, limit block 1 412 is inserted into limit groove 1 410, and guide rod 409 is inserted into limit sleeve 413, allowing connecting box 1 402 403 to be positioned... 02 and Connector Box 2 403 are quickly positioned to prevent changes in the angle between Connector Box 1 402 and Connector Box 2 403 during use, ensuring high stability. After quickly positioning Connector Box 1 402 and Connector Box 2 403, cover 2 502 can be rotated to align cover 1 501 and cover 2 502 with Connector Box 1 402 and Connector Box 2 403. After adjustment, cover 1 501 and cover 2 502 are placed on top of Connector Box 1 402 and Connector Box 2 403 to prevent dust accumulation inside Connector Box 1 402 and Connector Box 2 403, improving dust resistance. To extend the service life of the cables, the operator then inserts the first cable tray 1 into the connection box 402, causing it to abut against the stop block 404. This allows for quick positioning of the first cable tray 1, facilitating subsequent fixing. During the insertion of the first cable tray 1 into the connection box 402, when the limiting block 3 610 contacts the connecting block 2 611, the spring 1 604 contracts, causing the moving plate 603 to move inward. Simultaneously, as the first cable tray 1 completes its quick positioning, the spring 1 604 rebounds, pushing the limiting block 3 610 into the limiting groove 2 612, thus achieving quick positioning of the first cable tray 1. When the first cable tray 1 needs to be disassembled, the operator pulls the lever 609, the second limiting block 608 presses the moving plate 603, causing the moving plate 603 to move inward, thereby causing the third limiting block 610 to move inward. Then, the third limiting block 610 is pulled out of the second limiting groove 612, which can realize the quick disassembly of the first cable tray 1. In use, through the design of the ventilation port 7, air enters the interior of the first cable tray 1 through the ventilation port 7 to cool the cables inside the first cable tray 1, which facilitates the heat dissipation of the cables. Through the design of multiple ventilation ports 7, the overall heat dissipation effect is further improved, and the service life of the cables is also improved.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A connection structure for a cable tray, comprising a first cable tray (1) and a second cable tray (2), characterized in that: A top cover (3) is inserted and installed on the outer surface of the first cable tray (1). A connecting component one (4) is provided between the first cable tray (1) and the second cable tray (2). A connecting component two (5) is provided at one end of the connecting component one (4) near the top cover (3). A limiting component (6) is fixedly installed on the outer surface of the connecting component one (4). A ventilation opening (7) is provided on the side of the first cable tray (1) near the limiting component (6).

2. The connection structure of a cable tray according to claim 1, characterized in that: The connecting assembly one (4) includes a fixed shaft (401), a connecting box one (402), a connecting box two (403), a stop (404), a guide groove one (405), a guide block one (406), a fixed plate (407), a movable groove (408), a guide rod (409), a limiting groove one (410), a connecting rod (411), a limiting block one (412), and a limiting sleeve (413). The connecting box one (402) is rotatably mounted on the outer surface of the fixed shaft (401). 02) and connecting box two (403), both connecting box one (402) and connecting box two (403) have a stop block (404) fixedly installed on their inner surfaces. The first cable tray (1) and the second cable tray (2) have the same structure. The first cable tray (1) and the connecting box one (402) are plugged in. The cross section of the stop block (404) is U-shaped. The height and width of the stop block (404) are the same as the height and width of the first cable tray (1).

3. The connection structure of a cable tray according to claim 2, characterized in that: The first connecting box (402) has a guide groove (405) on the side near the second connecting box (403). A guide block (406) is fixedly installed at the end of the second connecting box (403) near the first connecting box (402). Fixed discs (407) are fixedly installed at both ends of the fixed shaft (401). A movable groove (408) is provided on the side of the fixed disc (407) away from the first connecting box (402). A guide rod (405) is fixedly installed on the side of the second connecting box (403) near the fixed disc (407). 09), a limiting groove (410) is provided on the side of the fixed plate (407) away from the connecting box (402), a connecting rod (411) is provided on the side of the fixed plate (407) away from the connecting box (402), a limiting block (412) and a limiting sleeve (413) are fixedly installed on the side of the connecting rod (411) close to the fixed plate (407), the guide block (406) and the guide groove (405) are plugged in, and the guide rod (409) and the movable groove (408) are slidably connected; The second connecting component (5) includes a first cover (501), a second cover (502), a second guide groove (503), and a second guide block (504). The second cover (502) is rotatably mounted on the outer surface of the first cover (501). The second guide groove (503) is provided on the side of the first cover (501) near the second cover (502). The second guide block (504) is fixedly mounted on the side of the second cover (502) near the first cover (501). The second guide block (504) and the second guide groove (503) are inserted into each other.

4. The connection structure of a cable tray according to claim 3, characterized in that: The limiting block (412) and the limiting groove (410) are connected by a plug-in joint, and the guide rod (409) and the limiting sleeve (413) are connected by a plug-in joint.

5. The connection structure of a cable tray according to claim 3, characterized in that: The first box cover (501) is adapted to the first connecting box (402), and the second box cover (502) is adapted to the second connecting box (403).

6. The connection structure of a cable tray according to claim 1, characterized in that: The limiting component (6) includes a connecting block one (601), a sliding rod one (602), a movable plate (603), a spring one (604), a sliding rod two (605), a movable sleeve (606), a spring two (607), a limiting block two (608), a pull rod (609), a limiting block three (610), a connecting block two (611), and a limiting groove two (612). The inner surface of the connecting block one (601) is fixedly fitted with the sliding rod one (602). The outer surface of the sliding rod one (602) is slidably connected to the movable plate (603). The outer surface of the movable plate (603) is fixedly fitted with the spring one (604). The inner surface of the connecting block one (601) is fixedly fitted with the sliding rod two (605). The outer surface of the sliding rod two (605) is slidably connected to the movable sleeve (606). The movable sleeve (606)... A second spring (607) is fixedly installed on the outer surface of the movable sleeve (606), a second limiting block (608) is fixedly installed on the inner surface of the movable sleeve (606), a pull rod (609) is fixedly installed on the outer surface of the movable sleeve (606), a third limiting block (610) is fixedly installed on the side of the movable plate (603) near the second limiting block (608), a second connecting block (611) is fixedly installed on the side of the first cable tray (1) near the vent (7), a second limiting groove (612) is opened on the side of the second connecting block (611) near the first connecting block (601), the end of the movable plate (603) is inclined, the third limiting block (610) is adapted to the second limiting groove (612), the cross section of the third limiting block (610) is a trapezoidal structure, and the cross section of the second limiting groove (612) is an L-shaped structure.

7. The connection structure of a cable tray according to claim 1, characterized in that: The ventilation openings (7) are provided in multiple identical manner, and the multiple ventilation openings (7) are distributed at equal intervals.

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