A quick-install cable bracket and cable trench construction method

Abstract

The present application discloses a construction method of a quick-install cable support and a cable trench, which relates to the technical field of electric power construction, and includes an embedded part and a support frame, wherein the embedded part includes a connecting strip and a connecting pipe connected to the connecting strip; the support frame includes a support seat, a connecting assembly connected to one side of the support seat, and a rotating frame hinged to the other side of the support seat, wherein the rotating frame is connected to a cam; the connecting assembly includes a sleeve plug-in connected to the insertion end, a sliding rod slidably connected in the sleeve, and a limiting part hinged to the sleeve, wherein the sliding rod is provided with a connecting cavity for inserting the limiting part, the side wall of the sleeve is provided with a through hole for the limiting part to pass through, a connecting rod is connected between the inner walls of the through hole, and the limiting part is provided with a connecting hole for the connecting rod to pass through; one end of the sliding rod abuts against the cam, and a spring is provided between the other end and the inner wall of the sleeve. The present application has the advantages of fast and convenient installation of the support frame.

Description

Technical Field

[0001] The present application relates to the technical field of electric power construction, and in particular to a construction method of a quick-install cable bracket and a cable trench. Background Art

[0002] Cable trench refers to the structural facilities used to lay cables and is an important part of power transmission and distribution projects. The common construction methods of cable trenches are as follows: first dig the trench, then support the formwork, tie the steel bars and pour concrete to form a trench, then backfill the trench perimeter, then install cable brackets at intervals on the inner wall of the trench, and finally lay the cables and install the cover.

[0003] During the construction of the above-mentioned cable trench, the cable bracket is generally fixed to the inner wall of the trench by expansion bolts. The installation process is relatively complicated and requires steps such as marking, positioning, and drilling.

[0004] In order to improve construction efficiency, a pre-embedded cable bracket is disclosed in the related art. The pre-embedded parts are installed during the steel bar binding stage. The cable bracket can be directly connected to the pre-embedded parts by bolts during installation. This solution does not require marking and drilling, and the construction efficiency is improved. However, there are still the following technical defects: the number of cable brackets is very large, the bolt installation is still time-consuming, and the construction efficiency needs to be further improved. Summary of the invention

[0005] In order to improve construction efficiency, the present application provides a construction method for a quick-install cable bracket and a cable trench.

[0006] In the first aspect, the present application provides a quick-install cable bracket adopting the following technical solution:

[0007] A quick-install cable bracket, comprising an embedded part and a support frame, wherein the embedded part comprises a connecting strip for connecting with a steel bar and a connecting pipe connected with the connecting strip, wherein one end of the connecting pipe is an insertion end and the other end is a closed end, and the insertion end is higher than the closed end;

[0008] The support frame includes a support seat for fitting the inner wall of the channel, a connecting assembly connected to one side of the support seat, and a rotating frame hinged to the other side of the support seat, and the rotating frame is connected to a cam;

[0009] The connecting assembly comprises a sleeve plug-connected with the insertion end, a sliding rod slidably connected in the sleeve, and a limiting part hinged with the sleeve, the sliding rod is provided with a connecting cavity for the limiting part to be inserted, the side wall of the sleeve is provided with a through hole for the limiting part to pass through, a connecting rod is connected between the inner walls of the through hole, the limiting part is provided with a connecting hole for the connecting rod to pass through, and the inner wall of the connecting pipe is provided with a limiting groove for the limiting part to be inserted;

[0010] One end of the slide rod is in contact with the cam, and a spring is arranged between the other end and the inner wall of the sleeve.

[0011] By adopting the above technical scheme, firstly, the rotation of the rotating frame is used as the driving source for locking the connecting component, and the resistance of the sliding rod to the cam is used as the limiting source after the rotating frame is in place, which effectively simplifies the installation operation steps, and the support frame is easy to install. It only needs to complete the actions of inserting the sliding rod and rotating the rotating frame, and the construction efficiency is high; secondly, when the cables are laid in multiple layers, the rotating frame of the upper layer can be rotated to a state parallel to the inner wall of the channel, reducing space occupancy and facilitating the laying of the cables in the lower layer; thirdly, the connecting pipe has an inclined angle, which is convenient for the stable placement of the support frame after the sleeve is inserted into the connecting pipe, avoiding the accidental detachment of the upper support frame from the embedded parts when the lower cable is laid.

[0012] Optionally, one end of the limiting portion is a limiting end, and the other end is a driving end, and the limiting end is located on a side of the driving end close to the cam;

[0013] When the rotating frame is parallel to the inner wall of the channel, the limiting portion does not extend out of the sleeve; when the rotating frame is perpendicular to the inner wall of the channel, the limiting portion is inserted into the limiting groove.

[0014] By adopting the above technical solution, the limiting part is distributed in a barb shape relative to the sleeve, which is beneficial to improving the connection tightness between the embedded part and the support frame and preventing the support frame from loosening.

[0015] Optionally, a positioning groove is provided on the side wall of the cam, and the end of the slide rod close to the cam is in an arch shape; when the rotating frame is perpendicular to the inner wall of the channel, the slide rod is inserted into the positioning groove.

[0016] By adopting the above technical solution, the rotating frame is used to lay cables when it is perpendicular to the inner wall of the channel. At this time, the slide rod is inserted into the positioning groove to further improve the positioning effect of the support frame and avoid the trouble of accidental rotation of the support frame.

[0017] Optionally, a driving rod is connected between the inner walls of the connecting cavity, and the driving end is provided with a waist-shaped hole for the driving rod to pass through.

[0018] By adopting the above technical solution, when the slide rod slides axially, the limiting part is driven to rotate by the driving rod, which is smoother.

[0019] Optionally, at least two support frames are arranged at vertical intervals, and a positioning assembly is connected between two adjacent support frames. The positioning assembly includes a socket connected to the lower side wall of the rotating frame, a strip inserted into the socket, and a socket connected to the upper side wall of the rotating frame, and the strip is plugged into the socket.

[0020] By adopting the above technical solution, firstly, in the vertical direction, the support frame can be used alone or in multiple arrangements, depending on the actual laying requirements, and the support frame has high adaptability; secondly, multiple support frames are connected by insert strips, so that the overall stability of the support frame is enhanced, and it is not easy to rotate accidentally due to external forces.

[0021] Optionally, the rotating frame includes a rotating shaft arranged vertically, a supporting bar fixedly connected to the rotating shaft, and an anti-dropping block fixedly connected to an end of the supporting bar away from the rotating shaft, and the rotating shaft is rotatably connected to the supporting seat.

[0022] Optionally, a groove for placing cables is provided on the upper side of the support bar.

[0023] By adopting the above technical solution, the cables are positioned by the grooves, the positions are kept stable, and the cables are not easy to interfere with each other.

[0024] Optionally, the support bar is connected to a first roller and a second roller, an annular groove for placing a cable is formed between the outer walls of the first roller and the second roller, an adjusting screw is rotatably connected to the middle part of the support bar, one end of the adjusting screw is connected to a handle, the outer wall of the adjusting screw is provided with a forward thread and a reverse thread, the first roller cooperates with the forward thread, and the second roller cooperates with the reverse thread.

[0025] By adopting the above technical solution, the support frame can be used as a cable pay-off frame to facilitate cable traction and laying. After the laying is completed, the handle is twisted to separate the first roller and the second roller, and the cable can be stably placed between the first roller and the second roller, achieving a good positioning effect.

[0026] In the second aspect, the present application provides a cable trench construction method using the following technical solution:

[0027] A cable trench construction method comprises the following steps:

[0028] The first step is to dig a trench;

[0029] The second step is to support the formwork, tie the steel bars, install the embedded parts, and pour the concrete;

[0030] The third step is to remove the formwork after the concrete is completely solidified and backfill the area around the trench;

[0031] The fourth step is to first insert the sleeve into the connecting pipe, then rotate the rotating frame, and use the cam to drive the sliding rod to move axially, so that the limiting part is turned into the limiting groove to complete the installation of the support frame.

[0032] Optionally, when the cables are laid in multiple layers, the support frames are installed sequentially from bottom to top.

[0033] In summary, this application has the following beneficial effects:

[0034] 1. The installation of the cable bracket of the present application only requires the insertion of the slide bar and the rotation of the rotating frame, which simplifies the installation operation steps and improves the construction efficiency;

[0035] 2. The support frame adopts a rotatable storage structure design. When cables need to be laid in multiple layers, the upper rotating frame can be rotated to a state parallel to the inner wall of the channel, reducing space occupancy and facilitating the laying of cables in the lower layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic structural diagram of a quick-install cable bracket according to Example 1 of the present application;

[0037] Figure 2 It is a schematic diagram of the structure of the embedded part installed at the steel bar in Example 1 of the present application;

[0038] Figure 3 is a schematic structural diagram of a support frame according to Example 1 of the present application;

[0039] Figure 4 is a cross-sectional schematic diagram of the support frame of Example 1 of the present application;

[0040] Figure 5 yes Figure 4 A magnified schematic diagram of the middle A area;

[0041] Figure 6 is a schematic diagram of the installation state of the quick-install cable bracket of Example 1 of the present application;

[0042] Figure 7 is a schematic structural diagram of a rotating frame of Example 2 of the present application;

[0043] Figure 8 It is a schematic cross-sectional view of the rotating frame of Example 2 of the present application.

[0044] Description of reference numerals: 1. embedded part; 11. connecting strip; 12. connecting pipe; 121. insertion end; 122. closed end; 123. limiting groove; 2. support frame; 21. support seat; 22. connecting assembly; 221. sleeve; 2211. through hole; 222. slide bar; 2221. connecting cavity; 223. limiting part; 2231. connecting hole; 2232. limiting end; 2233. driving end; 2234. waist-shaped hole; 224 , connecting rod; 225, spring; 226, driving rod; 23, rotating frame; 231, rotating shaft; 232, supporting bar; 2321, groove; 233, anti-dropping block; 24, cam; 241, positioning groove; 25, first roller; 26, second roller; 27, adjusting screw; 271, forward thread; 272, reverse thread; 28, handle; 3, positioning assembly; 31, sleeve; 32, insert strip; 33, socket; 4, annular groove. DETAILED DESCRIPTION

[0045] The following is combined with Figure 1-8 This application is described in further detail.

[0046] The embodiment of the present application discloses a quick-install cable bracket and a construction method of a cable trench.

[0047] Reference Figure 1 The quick-install cable bracket comprises an embedded part 1 for being embedded in a concrete channel and a support frame 2 plug-connected to the embedded part 1.

[0048] Reference Figure 1 , Figure 2 The embedded part 1 includes a connecting strip 11 for connecting with the steel bar and a connecting pipe 12 connected with the connecting strip 11. The connecting strip 11 is arranged vertically and has two hooked ends. During the construction of the cable trench, the two ends of the connecting strip 11 are respectively hooked with two corresponding transverse steel bars, so that the position of the embedded part 1 relative to the steel bar is fixed when pouring concrete. The connecting pipe 12 is fixedly penetrated through the connecting strip 11, and one end of the connecting pipe 12 is an insertion end 121 for the support frame 2 to be plugged in, and the other end is a closed end 122. During the construction of the cable trench, the closed end 122 is inside the template to prevent concrete from entering the connecting pipe 12, and the insertion end 121 is pressed against the template, so that the insertion end 121 is exposed relative to the inner wall of the trench after the construction of the cable trench is completed. The insertion end 121 is higher than the closed end 122, so that the connecting pipe 12 is arranged tilted, and the support frame 2 can maintain a stable position by its own gravity after insertion.

[0049] In the embodiment of the present application, two connecting pipes 12 are arranged at vertical intervals, and two supporting frames 2 are also arranged accordingly; in other embodiments, the number of connecting pipes 12 and supporting frames 2 can be one, three or more, depending on the number of layers required for cable laying.

[0050] Reference Figure 3 The support frame 2 includes a support seat 21, a connecting assembly 22 and a rotating frame 23. When installed, the support frame 2 fits the inner wall of the channel so that the overall structure of the support frame 2 remains stable. The connecting assembly 22 is connected to one side of the support seat 21 and is used to insert the connecting pipe 12. The rotating frame 23 is hinged to the side of the support seat 21 away from the connecting assembly 22.

[0051] Reference Figure 1 , Figure 3The rotating frame 23 includes a rotating shaft 231 arranged vertically, a support bar 232 fixedly connected to the rotating shaft 231, and an anti-dropping block 233 fixedly connected to the support bar 232 at one end away from the rotating shaft 231. The rotating shaft 231 is rotatably connected to the side of the support seat 21 away from the connecting assembly 22. The support bar 232 is perpendicular to the rotating shaft 231 and the lower side abuts against the support seat 21. A groove 2321 for placing cables is arranged on the upper side of the support bar 232. In the embodiment of the present application, the number of the grooves 2321 is set to two; in other embodiments, the number of the grooves 2321 can also be one, three or more. When laying multiple layers of cables, the rotating frame 23 of the upper layer can be rotated to a state parallel to the inner wall of the channel to reduce space occupation and facilitate the laying of cables in the lower layer.

[0052] Reference Figure 4 , Figure 5 In order to improve the tightness of the connection between the connection component 22 and the connection pipe 12, the connection component 22 includes a sleeve 221 plugged and connected to the insertion end 121, a slide bar 222 slidably connected in the sleeve 221, and a limiter 223 hinged to the sleeve 221. The sleeve 221 is opened at one end close to the support seat 21 for the slide bar 222 to extend, and the sleeve 221 is closed at one end away from the support seat 21. A spring 225 is abutted between the inner bottom wall of the sleeve 221 and the slide bar 222, and the spring 225 applies a thrust to the slide bar 222 to slide outward. A through hole 2211 is provided through the side wall of the sleeve 221, and a connecting rod 224 is fixedly connected between the two inner walls of the through hole 2211. A connecting hole 2231 is provided in the middle of the limiter 223 for the connecting rod 224 to pass through, so that the limiter 223 can rotate relative to the connecting rod 224.

[0053] One end of the limiting part 223 is a limiting end 2232, and the other end is a driving end 2233. The limiting end 2232 is located on the side of the driving end 2233 close to the cam 24. The inner wall of the connecting tube 12 is provided with a limiting groove 123 for the limiting end 2232 to be inserted. When the connecting assembly 22 is inserted into the connecting tube 12, the limiting part 223 is rotated to insert the limiting end 2232 into the limiting groove 123, so that the limiting part 223 can hook the connecting tube 12, thereby improving the connection tightness between the embedded part 1 and the supporting frame 2 and preventing the supporting frame 2 from loosening.

[0054] Reference Figure 4 , Figure 5 The side wall of the slide bar 222 is provided with a connecting cavity 2221 for the limiting portion 223 to be inserted, a driving rod 226 is fixedly connected between the two inner walls of the connecting cavity 2221, and a waist-shaped hole 2234 is provided at the driving end 2233 for the driving rod 226 to pass through. The axial sliding of the slide bar 222 drives the driving end 2233 to move, and the limiting end 2232 can be driven to rotate relative to the connecting rod 224, so as to realize the locking or unlocking of the connecting assembly 22.

[0055] It should be noted that when the slide bar 222 slides away from the rotating frame 23 , it can drive the limiting end 2232 to retract into the through hole 2211 ; when the slide bar 222 slides close to the rotating frame 23 , it can drive the limiting end 2232 to rotate out of the through hole 2211 .

[0056] Reference Figure 4 , Figure 5 In order to facilitate the locking or unlocking of the driving connecting assembly 22, the rotating shaft 231 is fixedly sleeved with a cam 24, one end of the sliding rod 222 abuts against the cam 24, and a spring 225 is arranged between the other end and the inner wall of the sleeve 221. The cross section of the cam 24 is elliptical, so that the cam 24 has a long end and a short end, so that the sliding rod 222 can be driven to slide axially by the rotation of the rotating shaft 231. It should be noted that the support seat 21 is penetrated with a through hole for the sliding rod 222 to pass through and the cam 24 to rotate, so that the support seat 21 hinders it.

[0057] When the rotating frame 23 is parallel to the inner wall of the channel, the long end of the cam 24 is opposite to the slide bar 222. At this time, the limit part 223 does not extend out of the sleeve 221, which facilitates the connection component 22 to be inserted into the connection pipe 12. When the rotating frame 23 rotates to be perpendicular to the inner wall of the channel, the short end of the cam 24 is opposite to the slide bar 222, driving the limit part 223 to rotate, and the limit end 2232 is inserted into the limit groove 123 to complete the locking. The rotation of the rotating frame 23 is used as the driving source for locking the connection component 22, which effectively simplifies the installation operation steps. The support frame 2 is easy to install. It only needs to complete the insertion of the slide bar 222 and the rotation of the rotating frame 23, and the construction efficiency is high.

[0058] Reference Figure 4 The short end side wall of the cam 24 is provided with a positioning groove 241 for the slide bar 222 to be inserted, and the end of the slide bar 222 close to the cam 24 is in an arch shape. When the cable needs to be laid, the rotating frame 23 is rotated to be perpendicular to the inner wall of the channel, and the slide bar 222 is inserted into the positioning groove 241, further improving the positioning effect of the support frame 2.

[0059] Reference Figure 1 , Figure 3 A positioning assembly 3 is connected between two adjacent support frames 2. The positioning assembly 3 includes a plug sleeve 31 fixedly connected to the lower side wall of the rotating shaft 231, a plug strip 32 inserted through the plug sleeve 31, and a socket 33 fixedly connected to the upper side wall of the rotating frame 23. The plug sleeve 31 has a U-shaped cross section, so that the plug strip 32 can be inserted from the side, and the socket 33 can be used for the plug strip 32 to be inserted vertically. After the lower layer of cable is laid, the upper rotating frame 23 is rotated 90 degrees to the laying state. At this time, the positions of the plug sleeve 31 and the socket 33 correspond, and then the plug strip 32 is inserted from the side of the plug sleeve 31, and then the plug strip 32 is inserted downward into the socket 33, so that the positioning assembly 3 can be completed. Through the positioning assembly 3, multiple independent support frames 2 are connected, which is conducive to enhancing the overall stability of the support frame 2.

[0060] Reference Figure 6 , a cable trench construction method, comprising the following steps:

[0061] The first step is to dig a trench;

[0062] The second step is to support the formwork, tie the steel bars and install the embedded parts 1 so that the connecting strips 11 hook the steel bars, and then pour the concrete;

[0063] The third step is to remove the formwork after the concrete is completely solidified and backfill the area around the trench;

[0064] In the fourth step, the sleeve 221 is first inserted into the connecting tube 12, and then the rotating frame 23 is rotated, and the cam 24 is used to drive the slide rod 222 to move axially, so that the limiting portion 223 is rotated into the limiting groove 123, and the support frame 2 is installed.

[0065] It should be noted that when the cables are laid in multiple layers, the support frames 2 are installed sequentially from bottom to top.

[0066] The difference from the first embodiment is that the structure of the rotating frame 23 is different.

[0067] Reference Figure 7 , Figure 8 The rotating frame 23 includes a rotating shaft 231 arranged vertically, a supporting bar 232 fixedly connected to the rotating shaft 231, and an anti-dropping block 233 fixedly connected to the end of the supporting bar 232 away from the rotating shaft 231. The supporting bar 232 is sleeved with a first roller 25 and a second roller 26, and two first rollers 25 and two second rollers 26 are provided for laying and fixing two groups of cables.

[0068] Reference Figure 7 , Figure 8 An annular groove 4 for placing cables is formed between the outer walls of the first roller 25 and the second roller 26, so the support frame 2 can be used as a pay-off frame to facilitate cable traction and laying. An adjusting screw 27 is rotatably passed through the middle of the support bar 232 in the horizontal direction, and a wheel sleeve is rotatably connected to the middle of the first roller 25 and the second roller 26. The wheel sleeve is slidably connected to the support bar 232 and is threadedly connected to the adjusting screw 27. A handle 28 is fixedly connected to one end of the adjusting screw 27. By rotating the handle 28, the adjusting screw 27 can be driven to rotate, thereby driving the first roller 25 and the second roller 26 to move along the adjusting screw 27. A forward thread 271 and a reverse thread 272 are provided on the outer wall of the adjusting screw 27. The wheel sleeve of the first roller 25 cooperates with the forward thread 271, and the wheel sleeve of the second roller 26 cooperates with the reverse thread 272.

[0069] When laying the cable, the handle 28 is turned to make the first roller 25 and the second roller 26 fit together, which can reduce the laying resistance. After the laying is completed, the handle 28 is turned to separate the first roller 25 and the second roller 26, so that the cable can be stably placed between the first roller 25 and the second roller 26, and has a good positioning effect.

[0070] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A quick-install cable bracket, comprising an embedded part (1) and a support frame (2), characterized in that: The embedded part (1) comprises a connecting strip (11) for connecting to a steel bar and a connecting pipe (12) connected to the connecting strip (11); one end of the connecting pipe (12) is an insertion end (121) and the other end is a closed end (122); the insertion end (121) is higher than the closed end (122); The support frame (2) comprises a support seat (21) for fitting against the inner wall of the channel, a connecting assembly (22) connected to one side of the support seat (21), and a rotating frame (23) hinged to the other side of the support seat (21), wherein the rotating frame (23) is connected to a cam (24); The connecting assembly (22) comprises a sleeve (221) plug-connected to the insertion end (121), a sliding rod (222) slidably connected to the sleeve (221), and a limiting portion (223) hinged to the sleeve (221); the sliding rod (222) is provided with a connecting cavity (2221) for the limiting portion (223) to be inserted; a side wall of the sleeve (221) is provided with a through hole (2211) for the limiting portion (223) to pass through; a connecting rod (224) is connected between the inner walls of the through hole (2211); the limiting portion (223) is provided with a connecting hole (2231) for the connecting rod (224) to pass through; and the inner wall of the connecting tube (12) is provided with a limiting groove (123) for the limiting portion (223) to be inserted into. One end of the slide bar (222) is in contact with the cam (24), and a spring (225) is provided between the other end and the inner wall of the sleeve (221); One end of the limiting portion (223) is a limiting end (2232), and the other end is a driving end (2233), and the limiting end (2232) is located on a side of the driving end (2233) close to the cam (24); a driving rod (226) is connected between the inner walls of the connecting cavity (2221), and the driving end (2233) is provided with a waist-shaped hole (2234) for the driving rod (226) to pass through.

2. The quick-install cable bracket according to claim 1, characterized in that: When the rotating frame (23) is parallel to the inner wall of the channel, the limiting portion (223) does not extend out of the sleeve (221); when the rotating frame (23) is perpendicular to the inner wall of the channel, the limiting portion (223) is inserted into the limiting groove (123).

3. The quick-install cable bracket according to claim 2, characterized in that: The side wall of the cam (24) is provided with a positioning groove (241), and the end of the slide bar (222) close to the cam (24) is in an arch shape; when the rotating frame (23) is perpendicular to the inner wall of the channel, the slide bar (222) is inserted into the positioning groove (241).

4. The quick-install cable bracket according to claim 1, characterized in that: At least two support frames (2) are arranged at intervals in the vertical direction, and a positioning assembly (3) is connected between two adjacent support frames (2). The positioning assembly (3) comprises a plug sleeve (31) connected to the lower side wall of the rotating frame (23), a plug strip (32) inserted into the plug sleeve (31), and a socket (33) connected to the upper side wall of the rotating frame (23), and the plug strip (32) is plugged into the socket (33).

5. The quick-install cable bracket according to claim 1, characterized in that: The rotating frame (23) comprises a rotating shaft (231) arranged vertically, a supporting bar (232) fixedly connected to the rotating shaft (231), and an anti-dropping block (233) fixedly connected to one end of the supporting bar (232) away from the rotating shaft (231); the rotating shaft (231) is rotatably connected to the supporting seat (21).

6. The quick-install cable bracket according to claim 5, characterized in that: The upper side of the support bar (232) is provided with a groove (2321) for placing the cable.

7. The quick-install cable bracket according to claim 5, characterized in that: The support bar (232) is connected to a first roller (25) and a second roller (26); an annular groove (4) for placing a cable is formed between the outer walls of the first roller (25) and the second roller (26); an adjusting screw rod (27) is rotatably connected to the middle of the support bar (232); one end of the adjusting screw rod (27) is connected to a handle (28); the outer wall of the adjusting screw rod (27) is provided with a forward thread (271) and a reverse thread (272); the first roller (25) cooperates with the forward thread (271), and the second roller (26) cooperates with the reverse thread (272).

8. A method for constructing a cable trench, relating to the quick-install cable support according to any one of claims 1 to 7, characterized in that: The steps include: The first step is to dig a trench; The second step is to support the formwork, tie the steel bars, install the embedded parts (1), and pour the concrete; The third step is to remove the formwork after the concrete is completely solidified and backfill the area around the trench; In the fourth step, the sleeve (221) is first inserted into the connecting tube (12), and then the rotating frame (23) is rotated, and the cam (24) is used to drive the slide rod (222) to move axially, so that the limiting portion (223) is rotated into the limiting groove (123), and the installation of the support frame (2) is completed.

9. The cable trench construction method according to claim 8, characterized in that: When the cables are laid in multiple layers, the support frames (2) are installed in sequence from bottom to top.

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