Cable lifting device for construction in cable trench

Abstract

The invention relates to the technical field of construction in a cable trench, in particular to a cable lifting device for construction in a cable trench, and the device comprises a lifting frame which is a supporting frame, is used for providing overall support and is fixed on the top surface of the cable trench; the driving telescopic assembly is installed and fixed to the middle of the lifting frame, the driven telescopic assemblies are installed and fixed to the two sides of the lifting frame correspondingly and used for adapting to different ditch widths, the driven telescopic assemblies stretch out and draw back synchronously along with the driving telescopic assembly, and the lifting frames are installed and fixed to the four corners of the lifting frame. The locking device is used for moving on a cable trench and locking the position; the lifting sliding plate is mounted in the middle of the lifting frame, the mounting block is mounted in the lifting sliding plate, the lifting rod is fixed in the mounting block, and the lifting rod is a lifting arm and is vertically mounted in the middle of the lifting sliding plate; the device has the advantages of being convenient to operate, safe and reliable, and greatly improving the mechanization level and the operation efficiency of construction in the cable trench.

Description

Technical Field

[0001] This invention relates to the field of cable trench construction technology, specifically to a cable lifting device for cable trench construction. Background Technology

[0002] In the construction and maintenance of cable trenches for infrastructure such as power and communications, it is often necessary to lay multiple cables in the trench. As a common cable laying environment, cable trenches are usually narrow, dark, and often already contain some operating cables, which brings great difficulties to the laying of new cables.

[0003] Currently, traditional cable lifting methods mainly rely on multiple people working together or using simple supports. Manual lifting is extremely labor-intensive, inefficient, and inconvenient to operate in narrow cable trenches, posing a high safety risk and easily causing muscle strain or sprains. It is also difficult to ensure the straightness and height consistency of the cable laying. Simple supports are often fixed in structure, making it difficult to flexibly adapt to cable trenches of different widths and depths. Adjusting the height and position is time-consuming and laborious, and the lack of an effective locking mechanism makes them prone to displacement or tipping when moved or under stress, affecting construction accuracy and efficiency.

[0004] Furthermore, existing methods lack the ability to locally lift and fine-tune the position of cables when they need to cross obstacles or make precise connections.

[0005] Therefore, there is an urgent need for a cable lifting device that can adapt to different trench widths, conveniently adjust height and position, operate safely and efficiently, and provide stable and reliable support, in order to solve the above-mentioned construction problems and improve the level of mechanization and operational safety of cable trench construction. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a cable lifting device for construction in cable trenches, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a cable lifting device for construction in a cable trench, comprising: a lifting frame, which is a support frame for providing overall support and fixing to the top surface of the cable trench; an active telescopic component, a driven telescopic component, and a lifting frame, wherein the active telescopic component is installed and fixed in the middle of the lifting frame, the driven telescopic components are respectively installed and fixed on both sides of the lifting frame to adapt to different trench widths, and the driven telescopic components extend and retract synchronously with the active telescopic component; the lifting frame is installed and fixed at the four corners of the lifting frame for moving and locking its position on the cable trench; a lifting slide plate, a mounting block, and a lifting rod, wherein the lifting slide plate is installed in the middle of the lifting frame, the mounting block is installed inside the lifting slide plate, and the lifting rod is fixed inside the mounting block; the lifting rod is a lifting arm, vertically installed in the middle of the lifting slide plate, wherein a support plate is horizontally arranged inside the lifting rod for directly lifting the cable and preventing it from sagging.

[0008] Preferably, the lifting frame is a rectangular frame with an open bottom. A first motor is provided at the top center of the lifting frame. The first motor has sliding grooves on both sides of the lifting frame. A slider is slidably mounted on the sliding groove. The lower end of the slider is fixedly connected to the lifting slide plate.

[0009] Preferably, the first motor is connected to a first bevel gear set inside the lifting frame, and the lower gear of the first bevel gear set is fixedly inserted into a slide rod, which is inserted into a slide groove and passes through the slider.

[0010] Preferably, the active telescopic assembly includes a telescopic rod laterally fixed to the middle telescopic rod of the support frame and a first telescopic sleeve disposed at the end of the telescopic rod.

[0011] Preferably, the telescopic rod has a rod groove inside near the first telescopic sleeve, a lead screw is threaded into the rod groove, a worm gear set is provided in the middle of the lead screw, a second bevel gear set is provided at one end of the worm on the worm gear set, and a second motor is connected to the upper gear of the second bevel gear set.

[0012] Preferably, the driven telescopic assembly includes a fixed rod that is laterally fixed to the lifting frame and a second telescopic sleeve disposed at the end of the fixed rod, wherein a spring is inserted inside the fixed rod and the second telescopic sleeve.

[0013] Preferably, the lifting frame includes a lifting sleeve vertically fixed to the support frame, a lifting support is embedded in the bottom end of the lifting sleeve, and racks are provided on the inner walls of both ends of the inner side of the lifting support which is a concave semicircle. The racks are meshed with gears, and the gears are fixedly connected to an adjusting component, which is disposed on one side surface of the lifting sleeve.

[0014] Preferably, the bottom end of the lifting support column has an L-shaped structure, and the bottom end of the L-shaped structure of the lifting support column is respectively provided with a fixed plate and a moving wheel, and a limit plate is also fixedly provided on one side of the top of the lifting support column.

[0015] Preferably, the mounting block has a fixing groove, and the fixing groove also has bolt holes and positioning blocks. A third motor is engaged in the fixing groove and fixed to the top of the lifting rod. Positioning grooves are also provided on both sides of the lifting rod. The positioning grooves open and close with the positioning blocks on the fixing groove, and fixing bolts are inserted into the bolt holes.

[0016] Preferably, the lifting rod has a U-shaped mounting groove in the middle, a screw is installed in the mounting groove, the screw is connected to a third motor at the top of the lifting rod, the mounting groove is also slidably provided with a support plate, the support plate is provided with a mounting hole and a limiting block in the mounting groove, the screw in the mounting groove is inserted into the mounting hole, and the limiting block is connected to the inner walls on both sides of the mounting groove.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By setting an adjustable-width active telescopic component and a linked passive telescopic component, the present invention can easily adapt to cable trenches of different widths, significantly improving the versatility of the device.

[0018] 2. The present invention, through the lifting frame and its equipped moving wheels, fixed plate and locking mechanism (meshing of gear 30 and rack 29), realizes the flexible movement and stable locking of the device on the top surface of the cable trench, which greatly facilitates the adjustment and precise positioning of the construction position.

[0019] 3. The present invention uses a lateral moving mechanism composed of a lifting plate, a slider and a groove, and a first motor drive, so that the lifting plate carrying the lifting rod can be precisely laterally displaced and adjusted along the length of the groove below the lifting frame, which is convenient for aligning the cable or avoiding obstacles.

[0020] 4. This invention uses a lifting plate inside the lifting rod, controlled by a screw driven by a third motor, to finely adjust and lift the cable vertically, ensuring that the cable is laid at a consistent height, straight and without sagging. This effectively solves the problems of high labor intensity, low efficiency and poor accuracy of manual lifting. The overall structure of this invention is reasonably designed, easy to operate, safe and reliable, and greatly improves the level of mechanization and work efficiency of cable trench construction. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the cable lifting device of the present invention; Figure 2 This is a schematic diagram of the support frame structure of the present invention; Figure 3 This is a schematic diagram of the active telescopic component structure of the present invention; Figure 4 This is a schematic diagram of the driven telescopic component structure of the present invention; Figure 5 This is a schematic diagram of the left-side lifting rod structure of the present invention; Figure 6 This is a schematic diagram of the mounting block structure of the present invention; Figure 7 This is a schematic diagram of the internal cross-sectional structure of the mounting block of the present invention; Figure 8 This is a schematic diagram of the right-side lifting rod structure of the present invention; Figure 9 This is a schematic diagram of the pallet structure of the present invention.

[0022] The diagram shows the following components: 1. Lifting frame; 2. Active telescopic assembly; 3. Driven telescopic assembly; 4. Lifting frame; 5. Lifting slide plate; 6. Mounting block; 7. Lifting rod; 8. First motor; 9. Slide groove; 10. Slider; 11. First bevel gear set; 12. Slide rod; 13. Telescopic rod; 14. First telescopic sleeve; 15. Second motor; 16. Second bevel gear set; 17. Worm gear set; 18. Lead screw; 19. Rod groove; 20. 21. Lifting sleeve; 22. Adjusting component; 23. Lifting support column; 24. Fixing plate; 25. Moving wheel; 26. Fixing rod; 27. Second telescopic sleeve; 28. Spring component; 29. ​​Limiting plate; 30. Rack; 31. Gear component; 32. Support plate; 33. Third motor; 34. Fixing bolt; 35. Fixing groove; 36. Bolt hole; 37. Positioning block; 38. Positioning groove; 39. Mounting groove; 40. Mounting hole; Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Example 1

[0024] like Figure 1-4As shown, this embodiment discloses a cable lifting device for construction in a cable trench, including: a lifting frame 1, which is a support frame used to provide overall support and be fixed to the top surface of the cable trench; an active telescopic component 2, a driven telescopic component 3, and a lifting frame 4. The active telescopic component 2 is installed and fixed in the middle of the lifting frame 1, and the driven telescopic components 3 are respectively installed and fixed on both sides of the lifting frame 1 to adapt to different trench widths. The driven telescopic components 3 extend and retract synchronously with the active telescopic component 2. The lifting frame 4 is installed and fixed at the four corners of the lifting frame 1 to move and lock its position on the cable trench; a lifting slide plate 5, a mounting block 6, and a lifting rod 7. The lifting slide plate 5 is installed in the middle of the lifting frame 1, the mounting block 6 is installed inside the lifting slide plate 5, and the lifting rod 7 is fixed inside the mounting block 6. The lifting rod 7 is a lifting arm that is vertically installed in the middle of the lifting slide plate 5. A support plate 31 is arranged horizontally inside the lifting rod 7 to directly lift the cable and prevent it from sagging.

[0025] In this embodiment, the L-shaped structure at the bottom of the lifting support column 22 is detachably anchored to the top surface of the cable trench by the fixing plate 23 to ensure the stability of the device; it is equipped with the moving wheel 24 to facilitate flexible movement on the top surface of the trench, and the position is locked by the engagement of the limiting plate 28 with the lifting sleeve 20. During operation, the operator rotates the adjusting component 21, which drives the gear component 30 to mesh with the rack 29, so that the lifting support column 22 can be vertically raised and lowered within the lifting sleeve 20 to adapt to different trench depths; Within the fixed groove 34, the third motor 32 is secured by the fixing bolt 33 in the bolt hole 35. The opening and closing of the positioning block 36 and the positioning groove 37 ensures that the lifting rod 7 is installed quickly and without displacement. After the third motor 32 at the top of the lifting rod 7 is started, it drives the screw in the mounting groove 38 to rotate, driving the support plate 31 to slide up and down in the U-shaped mounting groove 38 through the mounting hole 39. The limiting block 40 fits tightly against the inner wall of the mounting groove 38 to prevent the support plate 31 from shifting, thus achieving precise fine adjustment of the cable height with an error controlled within ±2mm.

[0026] The specific operation process is as follows: First, the second bevel gear set 16 and the worm gear set 17 are driven by the second motor 15, which drives the lead screw 18 to rotate in the rod groove 19, so that the telescopic rod 13 of the active telescopic assembly 2 and the first telescopic sleeve 14 can extend and retract synchronously. The fixed rod 25 and the second telescopic sleeve 26 of the driven telescopic component 3 automatically follow the extension and retraction under the action of the spring 27 to adapt to the range of groove width changes; Next, the first motor 8 drives the slide bar 12 to move in the slide groove 9 through the first bevel gear set 11, causing the slider 10 and the lifting slide plate 5 to move laterally, so that the lifting rod 7 is directly facing the cable laying position and avoids obstacles in the trench. Finally, the third motor 32 is started, the height of the support plate 31 is adjusted to the preset value, the cable is lifted and kept straight without sagging, improving construction efficiency by more than 30% while reducing manual intervention. Example 2

[0027] like Figure 5-9 As shown, this embodiment discloses a cable lifting device for construction in a cable trench, which includes a mounting block 6, a lifting rod 7, and a support plate 31. The mounting block 6 is vertically fixed to the center of the bottom of the lifting slide plate 5 by bolts. The rectangular fixing groove 34 inside the mounting block 6 has symmetrically arranged positioning blocks 36 on both sides, and four bolt holes 35 are evenly distributed on the bottom of the groove. The top of the lifting rod 7 is fitted into the fixing groove 34, and the dovetail-shaped groove positioning groove 37 on its side wall is precisely matched with the positioning block 36. The rigid connection is achieved by the fixing bolts 33 that pass through the flange and the bolt holes 35. The support plate 31 is slidably installed in the mounting groove 38 in the middle of the lifting rod 7. Several support plates 31 can be installed on the lifting rod 7 as needed.

[0028] In this embodiment, the middle section of the lifting rod 7 is made of high-strength alloy steel, and a pressure sensor is also provided at the end of the lifting rod 7. A double-headed ball screw is precisely assembled in its U-shaped mounting groove 38. The upper end of the screw is directly connected to the output shaft of the third motor 32 through a coupling. In this embodiment, a copper nut is embedded in the mounting hole 39 at the bottom of the pallet 31, forming a rolling friction pair with the double-ended ball screw. The limit blocks 40 on both sides are made of polytetrafluoroethylene material and slide with a 0.1mm gap to the inner wall of the mounting groove 38. When the third motor 32 receives the PLC control signal, it drives the pallet 31 to rise and fall at a speed of 5mm / s in the vertical direction. The anti-slip support surface uses laser etching technology to form a diamond-shaped grid pattern with a depth of 0.3mm on the upper surface of the support plate 31, increasing the coefficient of friction to 0.85.

[0029] In this embodiment, when laying multiple cables, the operator starts the lateral displacement program through the console: the first motor 8 drives the first bevel gear set 11 to rotate the slide bar 12, so that the slider 10 moves along the slide groove 9 at a speed of 10cm / s, and drives the two sets of lifting rods 7 to be independently positioned within the width of the trench, with a maximum span adjustment of 2 meters. When the cable needs to cross a pipe or joint in the trench, the device can achieve partial lifting by the lateral movement of the lifting slide plate 5; the anti-slip texture on the surface of the support plate 31 enhances the friction and prevents the cable from slipping. Meanwhile, during construction at the corner of the cable trench, after the moving wheel 24 of the lifting frame 4 is unlocked, the device can move along the trench wall at a 15° angle. When encountering a sudden change in trench width, the second motor 15 drives the lead screw 18 to rotate through the worm gear set 17, so that the active telescopic component 2 completes an 800mm stroke adjustment within 12 seconds. The spring component 27 of the driven telescopic component 3 compensates for ±50mm deformation in real time. The end pressure sensor of the lifting rod 7 provides real-time feedback on the cable weight. When the load exceeds 400kg, the overload protection is automatically activated. The hydraulic buffer causes the support plate 31 to descend slowly at a speed of 2mm / s to prevent the cable from sagging suddenly.

[0030] Working principle: Based on the structural features and operating mechanism of the device, its working principle can be systematically explained as follows: When the device is deployed on the top surface of the cable trench, vertical positioning is first achieved through the lifting frame 4: the operator rotates the adjusting component 21, which drives the gear component 30 to mesh with the rack 29 symmetrically arranged inside the lifting support 22, so that the lifting support 22 rises and falls vertically along the inner wall of the lifting sleeve 20 until the moving wheel 24 contacts the top surface of the trench; at this time, the limiting plate 28 engages with the top edge of the lifting sleeve 20 to lock the height, and the fixing plate 23 is fixed to the top surface of the trench through anchor bolts to form a stable support system.

[0031] Then, the groove width is adjusted: the second motor 15 of the active telescopic component 2 is started, and its output shaft drives the bevel gear of the second bevel gear set 16 to rotate. After a right-angle change of direction, it drives the worm of the worm gear set 17 to rotate. The worm gear meshes with the worm wheel to transmit motion to the lead screw 18, which drives the telescopic rod 13 to axially displace within the rod groove 19 through the threaded pair, thereby causing the first telescopic sleeve 14 to extend synchronously. During this process, the spring 27 of the driven telescopic component 3 is compressed and generates elastic reaction force, which pushes the second telescopic sleeve 26 to slide along the fixed rod 25, so that the overall width of the lifting frame 1 matches the size of the cable trench in real time. After the basic positioning is completed, the operator drives the lateral movement mechanism through the first motor 8: the output shaft of the first motor 8 changes direction through the first bevel gear set 11, drives the slide bar 12 to rotate in the slide groove 9, drives the slider 10 and the lifting slide plate 5 to move horizontally along the length of the groove, so that the lifting rod 7 is accurately aligned with the position of the cable to be laid. At this time, the lifting unit is activated: the third motor 32 drives the double-headed ball screw in the mounting groove 38 to rotate, and drives the support plate 31 to rise and fall in the vertical direction through the threaded pair. The limit blocks 40 on both sides of the support plate 31 maintain a precise sliding fit with the inner wall of the mounting groove 38 to ensure that the cable lifting surface is always in a horizontal state. When the diamond anti-slip texture on the surface of the support plate 31 contacts the cable, the height is continuously finely adjusted to keep multiple cables at the preset laying curvature and eliminate the sagging phenomenon.

[0032] In complex working conditions, such as crossing obstacles in the trench or working at a corner, the device achieves dynamic adjustment through the coordinated action of multiple mechanisms: the lateral movement mechanism drives the lifting rod 7 to avoid obstacles; when the moving wheel 24 of the lifting frame 4 is unlocked, the device can travel along the 15° inclined trench wall; when encountering a sudden change in trench width, the worm gear set 17 of the active telescopic component 2 provides a self-locking function to ensure that the width remains constant after adjustment; the pressure sensor monitors the cable load in real time, and when it exceeds the 400kg threshold, the hydraulic buffer is automatically activated, causing the pallet 31 to descend slowly at a speed of 2mm / s to prevent sudden displacement of the cable.

[0033] The foregoing has shown and described the basic principles and main features of the present invention and its advantages. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects. The scope of the present invention is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all changes falling within the meaning and scope of the equivalents of the claims be included within the present invention, and no reference numerals in the claims should be regarded as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cable lifting device for construction in a cable trench, characterized in that, include: Lifting frame (1), the lifting frame (1) is a support frame used to provide overall support and fix it to the top surface of the cable trench; Active telescopic component (2), driven telescopic component (3) and lifting frame (4), wherein the active telescopic component (2) is installed and fixed in the middle of the lifting frame (1), the driven telescopic component (3) is installed and fixed on both sides of the lifting frame (1) respectively, and the driven telescopic component (3) extends and retracts synchronously with the active telescopic component (2), and the lifting frame (4) is installed and fixed at the four corners of the lifting frame (1); The lifting slide (5), the mounting block (6), and the lifting rod (7) are provided. The lifting slide (5) is installed in the middle of the lifting frame (1). The mounting block (6) is installed inside the lifting slide (5). The lifting rod (7) is fixed inside the mounting block (6). The lifting rod (7) is a lifting arm that is vertically installed in the middle of the lifting slide (5). A support plate (31) is horizontally arranged inside the lifting rod (7).

2. The cable lifting device for construction in a cable trench according to claim 1, characterized in that: The lifting frame (1) is a rectangular frame with an open bottom. A first motor (8) is provided in the middle of the top of the lifting frame (1). The first motor (8) has a sliding groove (9) on both sides of the lifting frame (1). A slider (10) is slidably provided on the sliding groove (9). The lower end of the slider (10) is fixedly connected to the lifting slide plate (5).

3. The cable lifting device for construction in a cable trench according to claim 2, characterized in that: The first motor (8) is connected to a first bevel gear set (11) in the lifting frame (1). The lower gear of the first bevel gear set (11) is fixed with a slide rod (12). The slide rod (12) is inserted into the slide groove (9) and passes through the slider (10).

4. The cable lifting device for construction in a cable trench according to claim 1, characterized in that: The active telescopic assembly (2) includes a telescopic rod (13) laterally fixed to the middle telescopic rod (1) of the lifting frame (1) and a first telescopic sleeve (14) disposed at the end of the telescopic rod (13).

5. The cable lifting device for construction in a cable trench according to claim 4, characterized in that: The telescopic rod (13) has a rod groove (19) inside near the first telescopic sleeve (14). A lead screw (18) is threaded into the rod groove (19). A worm gear set (17) is provided in the middle of the lead screw (18). A second bevel gear set (16) is provided at one end of the worm on the worm gear set (17). The upper gear of the second bevel gear set (16) is connected to a second motor (15).

6. The cable lifting device for construction in a cable trench according to claim 1, characterized in that: The driven telescopic assembly (3) includes a fixed rod (25) that is laterally fixed on the lifting frame (1) and a second telescopic sleeve (26) disposed at the end of the fixed rod (25). A spring element (27) is inserted inside the fixed rod (25) and the second telescopic sleeve (26).

7. The cable lifting device for construction in a cable trench according to claim 1, characterized in that: The lifting frame (4) includes a lifting sleeve (20) vertically fixed on the lifting frame (1). A lifting support column (22) is embedded in the bottom end of the lifting sleeve (20). Both ends of the inner wall of the concave semicircle of the lifting support column (22) are provided with racks (29). The racks (29) are meshed with gear components (30). The gear components (30) are fixedly connected with adjusting components (21). The adjusting components (21) are provided on one side surface of the lifting sleeve (20).

8. The cable lifting device for construction in a cable trench according to claim 7, characterized in that: The bottom of the lifting support (22) is L-shaped. The bottom of the L-shaped structure of the lifting support (22) is provided with a fixed plate (23) and a moving wheel (24). A limit plate (28) is also fixedly provided on one side of the top of the lifting support (22).

9. The cable lifting device for construction in a cable trench according to claim 1, characterized in that: The mounting block (6) has a fixing groove (34) and a bolt hole (35) and a positioning block (36) are provided in the fixing groove (34). A third motor (32) is engaged in the fixing groove (34). The third motor (32) is fixed to the top of the lifting rod (7). Positioning grooves (37) are provided on both sides of the lifting rod (7). The positioning grooves (37) open and close with the positioning blocks (36) on the fixing groove (34). A fixing bolt (33) is inserted in the bolt hole (35).

10. The cable lifting device for construction in a cable trench according to claim 1, characterized in that: The lifting rod (7) has a U-shaped mounting groove (38) in the middle. A screw is installed in the mounting groove (38) and the screw is connected to the third motor (32) at the top of the lifting rod (7). A support plate (31) is also slidably installed in the mounting groove (38). The support plate (31) has a mounting hole (39) and a limiting block (40) in the mounting groove (38). The screw in the mounting groove (38) is inserted into the mounting hole (39), and the limiting block (40) is connected to the inner walls on both sides of the mounting groove (38).

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