Trenching Device and Method for Cable Trench

Abstract

This invention discloses a trenching device and method for cable trenches, comprising a vehicle body and a frame connected to the bottom of the vehicle body via a first lifting device, wherein the long axis of the frame is parallel to the forward direction of the vehicle body; the top and front sides of the frame are open, and a first transmission device and a second transmission device are disposed inside the frame; the transmission direction of the first transmission device faces the rear of the frame, and the first transmission device gradually rises from the front end to the rear end; the transmission direction of the second transmission device faces the side of the frame; the transmission end of the first transmission device is located above the second transmission device, and the transmission end of the second transmission device is located outside the frame. This invention provides a trenching device and method for cable trenches to solve the trenching problem caused by the increased width requirements of cable trenches in the prior art, achieving the purpose of forming a wider cable trench in one step and quickly removing soil.

Description

Technical Field

[0001] This invention relates to the field of cable laying, and more specifically to a trenching device and method for cable trenches. Background Technology

[0002] In the planning and construction of urban power systems, a large number of overhead cables can easily lead to increased safety hazards. Therefore, when laying distribution cables, they are often laid underground to improve the safety and reliability of the power distribution system. Laying cables underground requires excavating cable trenches. Traditional excavators and other equipment are too large and unsuitable for cable trench excavation in undeveloped urban areas. Therefore, some specialized trenching equipment has emerged in existing technologies for cable trench excavation. This type of equipment generally uses rollers for trenching, resulting in relatively narrow trenches. With the continuous development of the social economy, the main trenches where newly laid cable main lines are located need to accommodate more cables, leading to increased width requirements. The existing roller trenching method is gradually becoming insufficient to meet the required width of the cable trenches, and forcibly increasing the roller width can easily lead to difficulties in soil removal. Summary of the Invention

[0003] This invention provides a trenching device and method for cable trenches to solve the trenching problem caused by the increased width requirement of cable trenches in the prior art, and to achieve the purpose of forming a wider cable trench in one go and quickly removing the soil.

[0004] This invention is achieved through the following technical solution:

[0005] A trenching device for cable trenches includes a vehicle body and a frame connected to the bottom of the vehicle body via a first lifting device. The long axis of the frame is parallel to the forward direction of the vehicle body. The top and front sides of the frame are open. A first transmission device and a second transmission device are arranged inside the frame. The transmission direction of the first transmission device faces the rear of the frame and gradually rises from the front to the rear. The transmission direction of the second transmission device faces the side of the frame. The transmission end of the first transmission device is located above the second transmission device, and the transmission end of the second transmission device is located outside the frame.

[0006] To address the trenching challenges arising from the increased width requirements of cable trenches in existing technologies, this invention first proposes a trenching device for cable trenches. Like traditional trenching equipment, this device is moved along the direction of the cable trench by a vehicle. A first lifting device connects to a frame at the bottom of the vehicle, allowing for flexible adjustment of the frame's height to meet the trenching needs of cable trenches of varying depths.

[0007] In this application, the long axis of the frame is parallel to the vehicle's forward direction, and the frame is open not only on its top surface but also on its front side. Therefore, when the vehicle moves along the designed direction of the cable trench, the open sides of the frame face forward, and the soil is encompassed into the frame by the left and right side walls and the bottom surface, thus excavating a square trench with the same shape as the frame. The soil entering the frame is first transported backward and raised by the first transmission device until it falls from the end of the first transmission device onto the second transmission device, and then transported laterally by the second transmission device until the soil is transported to the outside of the frame.

[0008] As can be seen, this application abandons the existing method of cable trenching using rollers. Instead, the vehicle body drives the frame forward to excavate the trench, enabling rapid excavation and shaping of wider cable trenches. It also overcomes the drawbacks of traditional excavators and other equipment being too large and inconvenient to use, and is more conducive to the rapid simultaneous laying of multiple cables within the main cable trench. Traditional roller trenching methods typically compress soil against the trench walls, which becomes unsuitable when the trench width is increased. This application also overcomes the soil removal difficulties caused by forcibly increasing the roller width, allowing the excavated soil to be temporarily piled along the side of the formed trench, facilitating rapid backfilling after cable laying. In practical use, the frame width can be selected according to the required cable trench width.

[0009] It should be noted that in this application, "front" and "rear" refer to the forward direction of the vehicle body and "rear" refers to the backward direction of the vehicle body; furthermore, the first lifting device in this application can be implemented using any existing lifting technology; the first transmission device and the second transmission device in this application can both be implemented using existing transmission equipment, such as common conveyor belts, screw conveyors, etc.

[0010] Furthermore, it also includes a first guide plate located at the bottom of the frame and a second guide plate located behind the first guide plate; the bottom end of the first guide plate is located on the front end face of the frame, and the first guide plate is inclined upward from front to back; the second guide plate is inclined downward from front to back, and the top end of the second guide plate is located below the top end of the first guide plate, and the bottom end of the second guide plate is located above the first transmission device.

[0011] In this design, a first guide plate occupies the front end face of the frame, and the upward-sloping first guide plate guides the cut soil to quickly enter the frame. As the vehicle moves forward, the soil above the first guide plate penetrates deeper into the frame, entering the space above the second guide plate from the top of the first guide plate. The downward-sloping second guide plate then guides the soil onto the first conveying device. Because the frame in this application moves synchronously with the vehicle, once the soil passes the first guide plate and enters the space above the second guide plate, it is well contained by the frame, effectively preventing the soil from detaching from the frame's interior.

[0012] Furthermore, it also includes a support column fixed to the bottom surface inside the frame, with the second guide plate hinged to the top of the support column; the weight of the second guide plate located in the rear region of the support column is greater than the weight of the second guide plate located in the front region of the support column; it also includes an elastic element disposed below the top of the second guide plate, the elastic element being connected between the bottom surface of the frame and the second guide plate.

[0013] This design uses a support column as the fulcrum for the rotation of the second guide plate, leveraging the lever principle to allow the soil above the second guide plate to quickly move backward into the first transmission device, preventing a large amount of soil from accumulating on the second guide plate. Specifically, as the frame moves forward with the vehicle, the soil above the second guide plate also moves relative to the frame, causing the forces on the second guide plate to change continuously. Under the action of the support column and elastic element, the second guide plate swings, which helps to shake the soil off onto the first transmission device.

[0014] In addition, the support column divides the second guide plate into two parts along the front-to-back direction. The weight of the part located behind the support column is greater than that of the part located in front of the support column, so that the second guide plate can always maintain a downward tilt from front to back under normal circumstances, which is more conducive to the rapid entry of soil into the top of the first transmission device.

[0015] Furthermore, the frame is also provided with a plurality of rotating shafts located above the first guide plate and / or the second guide plate, and the rotating shafts are provided with a plurality of soil-breaking blades; it also includes a first power device for driving the rotating shafts to rotate.

[0016] This scheme uses a first power unit to drive each shaft to rotate. The soil entering the frame is broken by the soil-breaking blades on the shafts, which quickly disperses the soil into small pieces or particles. This makes it easier for the soil to quickly enter the first transmission device under the swing of the second guide plate. It also reduces the difficulty of subsequent transmission of the soil by the first and second transmission devices.

[0017] In addition, the first power unit can drive each shaft to rotate individually, or it can drive each shaft to rotate synchronously through a transmission mechanism.

[0018] Furthermore, it also includes a drill bit located below the first transmission device and / or the second transmission device, a second lifting device for driving the drill bit to rise and fall, and a second power device for driving the drill bit to rotate; the bottom surface of the frame has a through hole for the drill bit to pass through.

[0019] When using the trenching device of this application, it is necessary to excavate a foundation pit in advance to accommodate the frame and place the frame into the pit. In order to reduce the difficulty of operation and manpower consumption, this solution is specially equipped with a drill bit, which is driven to rotate by a second power device and lifted and lowered by a second lifting device. When not in use, the drill bit can be stored inside the frame through a through hole. At this time, the drill bit is located below the first transmission device and / or the second transmission device and will not interfere with the normal operation of the first transmission device and / or the second transmission device.

[0020] In this scheme, when excavating the cable trench, the vehicle is positioned at one end of the designed cable trench route. The bottom of the frame is lifted off the ground using the first lifting device, and then the drill bit is extended from the bottom of the frame to contact the ground using the second lifting device. At this time, the second power device is activated, and the drill bit begins to rotate. Simultaneously, the second lifting device slowly lowers the height of the drill bit, allowing it to gradually drill into the soil to the set depth. Afterward, the drill bit is lifted off the ground, and the vehicle is moved, moving the frame so that the drill bit is positioned adjacent to the already drilled hole. The drilling action is repeated until a hole large enough to insert the frame is drilled, which is then used as the foundation pit.

[0021] This solution enables the excavation of foundation pits using a cable trench excavation device, avoiding the need for workers to carry hand tools to the site for excavation, thus improving the automation and convenience of the operation.

[0022] Furthermore, the second power unit has a hollow output shaft, the second lifting device is disposed inside the hollow output shaft, the top of the drill bit is connected to the main shaft, the main shaft is connected to the second lifting device, and the outer wall of the top of the main shaft is provided with several annularly distributed limit keys, the inner wall of the hollow output shaft is provided with several limit grooves corresponding to the limit keys, the bottom of the limit grooves is open, and the limit keys slide in the corresponding limit grooves.

[0023] In this design, the second power unit drives the hollow output shaft to rotate. The hollow output shaft is connected to the main shaft via a keyway, so the main shaft rotates synchronously with the hollow output shaft, driving the drill bit to rotate. The second lifting device is located inside the hollow output shaft, and therefore rotates synchronously with the hollow output shaft, ensuring that the rotation and lifting actions of the drill bit do not interfere with each other; at the same time, the second lifting device connects the drill bit to prevent it from falling off.

[0024] Furthermore, a vertical baffle is provided below the first transmission device, and a horizontal baffle is provided below the second transmission device, with the horizontal baffle abutting against the vertical baffle; the second power device is installed at the bottom of the horizontal baffle.

[0025] This solution uses vertical and horizontal baffles to prevent the soil brought out by the drill bit from interfering with the operation of the first and second transmission devices; at the same time, the horizontal baffle provides an installation position for the second power device.

[0026] Furthermore, it also includes bulldozer components located on both sides of the front end of the frame, with the bulldozer components on both sides facing each other.

[0027] In many operating conditions, cable trenches require the installation of cover plates. Existing cable trench forming equipment cannot directly form the cover plate grooves, necessitating manual excavation later, which is inefficient. To address this, this solution incorporates bulldozers on both sides of the front end of the frame. As the frame advances, the bulldozers move synchronously, directly pushing the cover plate grooves out from both sides of the cable trench. This achieves one-time forming of the cover plate grooves along with the cable trench, facilitating direct installation later and eliminating the cumbersome manual trenching process, thus improving the overall operational efficiency of the cable trench.

[0028] Furthermore, the frame body has assembly slots with open top and front sides on both sides of its front end, and a guide channel communicating with the assembly slots is also provided on the outer side wall of the frame body. The top surface of the guide channel is open. It also includes a first sliding part that matches the assembly slot, and the first sliding part is connected to the bulldozer component through a second sliding part that matches the guide channel. It also includes a plurality of pads that match the assembly slot. The first sliding part has a first threaded through hole, and the pads have a second threaded through hole that matches the first threaded through hole. The bottom of the assembly slot has a threaded blind hole. It also includes bolts that match the first threaded through hole, the second threaded through hole, and the threaded blind hole.

[0029] Since the depth of the cable trench is fixed, the specific height of the frame is also fixed for flat ground. However, the cable trench covers have different thicknesses, and the corresponding trenches also need to have different depths. Therefore, the bulldozer needs to be able to adjust the height to meet the usage requirements of different covers.

[0030] In this design, the bulldozer component, together with the first and second sliding parts, forms an H-shaped structure. The assembly slot matches the first sliding part of the H-shaped structure, and the guide channel matches the second sliding part. Therefore, the entire H-shaped structure can slide up and down to adjust its height. In practical use, first remove the H-shaped structure from the top. Based on the required height of the bulldozer component, install the corresponding thickness or number of pads in the assembly slot. Then, insert the H-shaped structure and tighten it by screwing bolts into the first threaded through holes, each of the second threaded through holes, and the threaded blind holes. At this point, the bulldozer component is in a stable, relatively fixed state with the frame, and will not be misaligned or shifted due to soil resistance.

[0031] This solution raises the first sliding part by using pads, thereby synchronously adjusting the height of the bulldozer to the required position. The operation is simple and convenient, and it fully ensures the stability of the bulldozer's position. At the same time, the purely mechanical adjustment method avoids the problem of damage to electrical or control equipment due to soil erosion.

[0032] The trenching method based on the trenching device for cable trenches in this application includes:

[0033] Excavate a foundation pit to the designated depth at one end of the cable trench design route;

[0034] The vehicle body is positioned across the pit, and the frame is lowered into the pit using the first lifting device.

[0035] The vehicle body moves forward along the designed route of the cable trench. The soil inside the frame is transferred to the second transmission device via the first transmission device, and then transferred to the ground outside the frame via the second transmission device.

[0036] The vehicle can move forward in any existing way, including but not limited to human power or engine, electric motor, etc.

[0037] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0038] 1. The present invention provides a trenching device and method for cable trenches, which abandons the existing cable trenching operation method of using rollers for trenching. Instead, the vehicle body drives the frame forward to dig the trench, which realizes the rapid excavation and shaping of wider cable trenches. At the same time, it overcomes the shortcomings of traditional excavators and other equipment that are too large and inconvenient to use, and is more conducive to the rapid laying of multiple cables in the main cable trench at the same time.

[0039] 2. The trenching device and method of the present invention for cable trenches overcomes the problem of soil removal caused by forcibly increasing the width of the rollers. The excavated soil can be temporarily piled up along the side of the formed trench, which facilitates the rapid backfilling operation after the cable is laid. It can also meet the trenching operation needs of cable trenches of different depths.

[0040] 3. The trenching device and method of the present invention for cable trenches can guide the cut soil to quickly enter the frame and make the soil well wrapped by the frame, effectively preventing the soil from detaching from the inner area of ​​the frame.

[0041] 4. The trenching device and method of the present invention for cable trenches can shake the soil onto the first transmission device through the second guide plate, which is more conducive to the soil quickly entering the top of the first transmission device.

[0042] 5. The trenching device and method of the present invention for cable trenches uses the soil-breaking blade on the rotating shaft to break the soil entering the frame body, thereby quickly dispersing the soil into small pieces or particles, which is more conducive to the soil quickly entering the first transmission device under the swing of the second guide plate, and can also reduce the difficulty of subsequent transmission of soil by the first and second transmission devices.

[0043] 6. The present invention provides a trenching device and method for cable trenches, which can excavate the foundation pit through the trenching device, avoiding the problem that workers still need to carry hand tools to the site to excavate the foundation pit during trenching operations, thus improving the automation and convenience of the operation.

[0044] 7. The trenching device and method of the present invention for cable trenches realizes the one-time forming of the cover plate groove along with the cable trench, which facilitates the direct laying of the cover plate groove in the later stage, eliminating the cumbersome operation process of manual trenching and improving the overall operation efficiency of cable trenches; it can also adjust the height of the bulldozer to the required position, which is simple and convenient to operate and fully ensures the stability of the bulldozer position. At the same time, the purely mechanical adjustment method avoids the problem of damage to electrical or electrical control equipment due to soil erosion. Attached Figure Description

[0045] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0046] Figure 1 This is a side view of a specific embodiment of the present invention;

[0047] Figure 2 This is a front view of a specific embodiment of the present invention;

[0048] Figure 3 This is a cross-sectional view of the frame in a specific embodiment of the present invention;

[0049] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0050] Figure 5 This is a schematic diagram of the frame structure in a specific embodiment of the present invention;

[0051] Figure 6 This is a schematic diagram of the installation of the bulldozer component in a specific embodiment of the present invention.

[0052] The attached diagram shows the markings and corresponding component names:

[0053] 1-Vehicle body, 2-First lifting device, 3-Frame, 4-First transmission device, 5-Second transmission device, 6-First guide plate, 7-Second guide plate, 8-Support column, 9-Elastic element, 10-Rotating shaft, 11-Breaking blade, 12-Drill bit, 13-Second lifting device, 14-Second power device, 15-Through hole, 16-Hollow output shaft, 17-Main shaft, 18-Limit key, 19-Limit groove, 20-Vertical baffle, 21-Horizontal baffle, 22-Bulling component, 23-Assembly groove, 24-Guide channel, 25-First sliding part, 26-Second sliding part, 27-Pad, 28-First threaded through hole, 29-Second threaded through hole, 30-Bolt, 31-Roller. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments and accompanying drawings. The illustrative embodiments and descriptions of this invention are for explaining the invention only and are not intended to limit the invention. In the description of this application, it should be understood that terms such as "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "high," "low," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application.

[0055] Example 1:

[0056] like Figures 1 to 5 The trenching device for cable trenches shown includes a vehicle body 1 and a frame 3 connected to the bottom of the vehicle body 1 via a first lifting device 2. The long axis of the frame 3 is parallel to the forward direction of the vehicle body 1. The top and front sides of the frame 3 are open. A first transmission device 4 and a second transmission device 5 are arranged inside the frame 3. The transmission direction of the first transmission device 4 faces the rear of the frame 3, and the first transmission device 4 gradually rises from the front end to the rear end. The transmission direction of the second transmission device 5 faces the side of the frame 3. The transmission end of the first transmission device 4 is located above the second transmission device 5, and the transmission end of the second transmission device 5 is located outside the frame 3.

[0057] This embodiment also includes a first guide plate 6 located at the bottom of the inside of the frame 3 and a second guide plate 7 located behind the first guide plate 6; the bottom end of the first guide plate 6 is located on the front end face of the frame 3, and the first guide plate 6 is inclined upward from front to back; the second guide plate 7 is inclined downward from front to back, and the top end of the second guide plate 7 is located below the top end of the first guide plate 6, and the bottom end of the second guide plate 7 is located above the first transmission device 4.

[0058] This embodiment also includes a support column 8 fixed inside the bottom surface of the frame 3, and the second guide plate 7 is hinged to the top of the support column 8; the weight of the second guide plate 7 located in the rear region of the support column 8 is greater than the weight of the second guide plate 7 located in the front region of the support column 8; it also includes an elastic element 9 disposed below the top of the second guide plate 7, and the elastic element 9 is connected between the bottom surface of the frame 3 and the second guide plate 7.

[0059] The frame 3 is also provided with a plurality of rotating shafts 10 located above the first guide plate 6 and / or the second guide plate 7, and a plurality of soil-breaking blades 11 are provided on the rotating shafts 10; it also includes a first power device for driving the rotating shafts 10 to rotate.

[0060] In this embodiment, both the first transmission device 4 and the second transmission device 5 are conveyor belts with rough surfaces; both sides can be provided with blocking structures to prevent the conveyed objects from falling. In addition, a number of rollers 31 are provided at the bottom of the vehicle body 1. Preferably, there are two rows of rollers 31, which are distributed laterally along the vehicle body 1, and the frame 3 is located in the area between the two rows of rollers 31; during operation, the two rows of rollers 31 are respectively located on both sides of the cable trench to be excavated.

[0061] In a more preferred embodiment, there are multiple support columns 8, and the second guide plate 7 is hinged to the top of each support column via a pivot.

[0062] In a more preferred embodiment, the elastic element 9 is a thrust spring, used to push the front end of the second guide plate 7 against the bottom surface of the first guide plate 6 when no external force is applied.

[0063] In a more preferred embodiment, each rotating shaft 10 is Figure 3 Rotating clockwise along the middle edge helps to bring the broken soil deeper into the frame, and further prevents the broken soil from falling back out of the frame.

[0064] In a more preferred embodiment, the first driving device is a motor, whose output end drives each rotating shaft to rotate synchronously via a synchronous belt; the motor and the synchronous belt can be hidden inside the side wall of the frame.

[0065] Example 2:

[0066] A trenching device for cable trenches, based on Embodiment 1, such as... Figure 3 and Figure 4 As shown, it also includes a drill bit 12 located below the first transmission device 4 and / or the second transmission device 5, a second lifting device 13 for driving the drill bit 12 to rise and fall, and a second power device 14 for driving the drill bit 12 to rotate; the bottom surface of the frame 3 has a through hole 15 for the drill bit 12 to pass through.

[0067] The second power unit 14 has a hollow output shaft 16, and the second lifting device 13 is disposed inside the hollow output shaft 16. The top of the drill bit 12 is connected to the main shaft 17, the main shaft 17 is connected to the second lifting device 13, and the outer wall of the top end of the main shaft 17 is provided with several annularly distributed limit keys 18. The inner wall of the hollow output shaft 16 is provided with several limit grooves 19 corresponding to the limit keys 18 one by one. The bottom end of the limit grooves 19 is open, and the limit keys 18 slide in the corresponding limit grooves 19.

[0068] A vertical baffle 20 is provided below the first transmission device 4, and a horizontal baffle 21 is provided below the second transmission device 5. The horizontal baffle 21 abuts against the vertical baffle 20. The second power device 14 is installed at the bottom of the horizontal baffle 21.

[0069] In a more preferred embodiment, a closed space is formed between the vertical baffle 20, the horizontal baffle 21, and the side wall of the frame, and the closed space is connected to the outside only by the through hole 15 at the bottom.

[0070] Example 3:

[0071] A trenching device for cable trenches, based on any of the above embodiments, such as... Figures 1 to 6 As shown, it also includes bulldozer components 22 disposed on both sides of the front end of the frame 3, with the bulldozer components 22 facing each other. In this embodiment, the bulldozer components 22 are square in shape.

[0072] like Figure 5 and Figure 6 As shown, the frame 3 has an assembly groove 23 with an open top surface and front side surface on both sides of the front end. The outer side wall of the frame 3 also has a guide channel 24 communicating with the assembly groove 23. The top surface of the guide channel 24 is open. The frame 3 also includes a first sliding part 25 that matches the assembly groove 23. The first sliding part 25 is connected to the bulldozer component 22 through a second sliding part 26. The second sliding part 26 matches the guide channel 24. The frame 3 also includes a plurality of pads 27 that match the assembly groove 23. The first sliding part 25 has a first threaded through hole 28. The pads 27 have a second threaded through hole 29 that matches the first threaded through hole 28. The bottom of the assembly groove 23 has a threaded blind hole. The frame 3 also includes bolts 30 that match the first threaded through hole 28, the second threaded through hole 29 and the threaded blind hole.

[0073] Among them, the pad 27 can be matched with multiple pads of equal or different thicknesses, which can be flexibly selected according to the actual working conditions.

[0074] Example 4:

[0075] A method for digging cable trenches, implemented using a trenching device based on any of the above embodiments, includes the following steps:

[0076] S1. Excavate a foundation pit to the set depth at one end of the designed cable trench route;

[0077] S2. Make the vehicle body 1 span across the pit, and lower the frame 3 into the pit using the first lifting device 2;

[0078] S3. Drive the vehicle body 1 along the designed route of the cable trench. The soil inside the frame 3 is transferred to the second transmission device 5 via the first transmission device 4, and then transferred to the ground on the side of the frame 3 via the second transmission device 5.

[0079] In a more preferred embodiment, the method for excavating a foundation pit to a predetermined depth includes:

[0080] S101. Position the vehicle body at one end of the cable trench design line, and lift the bottom of the frame off the ground using the first lifting device;

[0081] S102. Extend the drill bit from the bottom of the frame to contact the ground through the second lifting device. At this time, start the second power device and the drill bit starts to rotate. At the same time, the second lifting device slowly lowers the height of the drill bit so that the drill bit gradually drills into the soil to the set depth and starts the drilling action.

[0082] S103. After drilling to the set depth, lift the drill bit off the ground, move the vehicle body and drive the frame to move, so that the drill bit is on the position adjacent to the already drilled hole, repeat the drilling action until a hole is drilled that can be inserted into the frame, and use the hole as the foundation pit.

[0083] In a more preferred embodiment, as the vehicle body 1 moves along the designed route of the cable trench, the first power device drives each rotating shaft 10 to rotate, which in turn drives the soil-breaking blades 11 on them to rotate, breaking the soil that has just entered the frame.

[0084] In a more preferred embodiment, the rotating shaft 10 has at least two rows in the longitudinal direction.

[0085] In a more preferred embodiment, as the vehicle body 1 moves along the designed route of the cable trench: if the road surface is flat, the frame height can be kept stable; if the road surface is uneven, the frame height can be adjusted in time according to the undulations of the road surface.

[0086] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0087] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Additionally, the term "connection" as used herein, unless otherwise specified, can refer to a direct connection or an indirect connection via other components.

Claims

1. A trenching device for cable trenches, comprising a vehicle body (1), characterized in that, It also includes a frame (3) connected to the bottom of the vehicle body (1) via a first lifting device (2), the long axis of the frame (3) being parallel to the forward direction of the vehicle body (1); the top and front sides of the frame (3) are open, and a first transmission device (4) and a second transmission device (5) are installed inside the frame (3); the transmission direction of the first transmission device (4) is towards the rear of the frame (3), and the first transmission device (4) gradually rises from the front end to the rear end; the transmission direction of the second transmission device (5) is towards the side of the frame (3). The transmission end of the first transmission device (4) is located above the second transmission device (5), and the transmission end of the second transmission device (5) is located outside the frame (3); it also includes a drill bit (12) located below the first transmission device (4) and / or the second transmission device (5), a second lifting device (13) for driving the drill bit (12) to rise and fall, and a second power device (14) for driving the drill bit (12) to rotate; the bottom surface of the frame (3) is provided with a through hole (15) for the drill bit (12) to pass through.

2. The trenching device for cable trenches according to claim 1, characterized in that, It also includes a first guide plate (6) located at the bottom of the inside of the frame (3) and a second guide plate (7) located behind the first guide plate (6); the bottom end of the first guide plate (6) is located on the front end face of the frame (3), and the first guide plate (6) is inclined upward from front to back; the second guide plate (7) is inclined downward from front to back, and the top end of the second guide plate (7) is located below the top end of the first guide plate (6), and the bottom end of the second guide plate (7) is located above the first transmission device (4).

3. The trenching device for cable trenches according to claim 2, characterized in that, It also includes a support column (8) fixed inside the bottom surface of the frame (3), and the second guide plate (7) is hinged to the top of the support column (8); the weight of the second guide plate (7) located in the rear area of ​​the support column (8) is greater than the weight of the second guide plate (7) located in the front area of ​​the support column (8); it also includes an elastic element (9) disposed below the top of the second guide plate (7), and the elastic element (9) is connected between the bottom surface of the frame (3) and the second guide plate (7).

4. The trenching device for cable trenches according to claim 2, characterized in that, The frame (3) is also provided with a number of rotating shafts (10) located above the first guide plate (6) and / or the second guide plate (7), and a number of soil-breaking blades (11) are provided on the rotating shafts (10); it also includes a first power device for driving the rotating shafts (10) to rotate.

5. The trenching device for cable trenches according to claim 1, characterized in that, The second power unit (14) has a hollow output shaft (16), and the second lifting device (13) is located inside the hollow output shaft (16). The top of the drill bit (12) is connected to the main shaft (17), the main shaft (17) is connected to the second lifting device (13), and the outer wall of the top of the main shaft (17) is provided with several annularly distributed limit keys (18). The inner wall of the hollow output shaft (16) is provided with several limit grooves (19) that correspond one-to-one with the limit keys (18). The bottom of the limit grooves (19) is open, and the limit keys (18) slide in the corresponding limit grooves (19).

6. The trenching device for cable trenches according to claim 1, characterized in that, A vertical baffle (20) is provided below the first transmission device (4), and a horizontal baffle (21) is provided below the second transmission device (5). The horizontal baffle (21) abuts against the vertical baffle (20); the second power device (14) is installed at the bottom of the horizontal baffle (21).

7. The trenching device for cable trenches according to claim 1, characterized in that, It also includes bulldozer components (22) set on both sides of the front end of the frame (3), with the bulldozer components (22) on both sides facing each other.

8. The trenching device for cable trenches according to claim 7, characterized in that, The frame (3) has an assembly groove (23) with an open top surface and an open front side surface on both sides of the front end. The outer side wall of the frame (3) also has a guide channel (24) communicating with the assembly groove (23). The top surface of the guide channel (24) is open. The frame (3) also includes a first sliding part (25) that matches the assembly groove (23). The first sliding part (25) is connected to the bulldozer (22) through a second sliding part (26). The second sliding part (26) matches the guide channel (24). The frame (3) also includes a number of pads (27) that match the assembly groove (23). The first sliding part (25) has a first threaded through hole (28). The pads (27) have a second threaded through hole (29) that matches the first threaded through hole (28). The bottom of the assembly groove (23) has a threaded blind hole. The frame (3) also includes bolts (30) that match the first threaded through hole (28), the second threaded through hole (29), and the threaded blind hole.

9. A trenching method based on the trenching device for cable trenches according to any one of claims 1 to 8, characterized in that, include: Excavate a foundation pit to the designated depth at one end of the cable trench design route; Make the vehicle body (1) span across the pit, and lower the frame (3) into the pit through the first lifting device (2); The driving vehicle (1) moves forward along the designed route of the cable trench. The soil inside the frame (3) is transferred to the second transmission device (5) via the first transmission device (4), and then transferred to the ground outside the frame (3) via the second transmission device (5).

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