Pipe ditch cover lifting device

Abstract

The present application relates to pipe trench cover technical field, specifically be a kind of pipe trench cover hoist tool, including hoist tool, hoist tool includes connecting frame, connecting frame is equipped with the positioning plate that is slightly displaced up and down along connecting frame and connecting frame and positioning plate are used to position pipe trench cover, hoist tool is also equipped with the limiting structure for limiting pipe trench cover, at least one limiting plate that is angle-adjusted along connecting frame is equipped in connecting frame and the limiting plate is in contact with pipe trench cover, the outside of connecting frame is equipped with the adjustable telescopic rod that is bearing type connected with connecting frame and the output end of adjustable telescopic rod is equipped with the connecting block for the auxiliary support of connecting frame.The pipe trench cover hoist tool, compared with prior art, the present application has the characteristics of high auxiliary, installation stable, fast etc., and when hoisting pipe trench cover, greatly improve the stability when hoisting, and avoid the risk of falling when hoisting pipe trench cover.

Description

Technical Field

[0001] This invention relates to the field of trench cover technology, specifically a trench cover lifting fixture. Background Technology

[0002] Drainage ditches are ubiquitous in factories and residential areas. To prevent these ditches from being exposed, trench covers are usually installed. These covers are typically precast concrete blocks with embedded round steel bars as lifting lugs. However, if the trench has not been opened for a long time, dust, iron filings, and sand can accumulate between the concrete covers, making it impossible to hook the covers.

[0003] Chinese Patent (Announcement No. CN 209493220 U) discloses a utility model entitled "A Lifting Fixture for Precast Trench Covers that Facilitates Demolding," comprising a support box, a slotted box, and a lifting rod. The support box is located inside the template base, with a rectangular hole at the top of the template base directly below the pre-drilled hole for the trench cover. The support box is fixedly connected to the inner wall of the template base from below the rectangular hole. The slotted box is located inside the support box and includes two interlocking blocks. Each interlocking block has a slotted notch on one side, which together form a slotted hole. The lifting rod passes through the slotted hole and includes a load-bearing rod with an inverted T-shaped hook at the bottom and a lifting ring at the top. While this fixture can lift precast trench covers, it is cumbersome and difficult to lift modular trench cover assemblies quickly, and it also poses a certain degree of danger. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a trench cover lifting fixture, which solves problems such as difficulties in lifting trench covers and avoids harm to the personal safety of workers.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a trench cover lifting fixture, comprising a lifting fixture including a connecting frame, wherein the connecting frame is provided with a positioning plate that can move up and down slightly along the connecting frame, and the connecting frame and the positioning plate are used to position the trench cover; the lifting fixture is also provided with a limiting structure for limiting the trench cover; the connecting frame is provided with at least one limiting plate that can be angled along the connecting frame and the limiting plate abuts against the trench cover; the outside of the connecting frame is provided with an adjustable telescopic rod that is bearing-type connected to the connecting frame, and the output end of the adjustable telescopic rod is provided with a connecting block for auxiliary support of the connecting frame.

[0008] Preferably, the positioning plate slides along the track of the connecting frame. The connecting frame has an external displacement adjustment structure connected to the positioning plate for adjusting its vertical movement. This displacement adjustment structure includes a toothed belt connected to the positioning plate, and the connecting frame has an external gear that meshes with the toothed belt and drives it to move vertically. A micro servo motor drives the gear to rotate, causing the toothed belt to move vertically, thus moving the positioning plate vertically. The position is then locked in place by a limiting member.

[0009] Preferably, the rotation of the gear is driven by a micro servo motor, and the external of the connecting frame is provided with a limiting member for limiting the up-and-down movement of the toothed belt. The micro servo motor is model JMC-JAND750W17BCD.

[0010] Preferably, the connecting frame has two spaced-apart limiting plates, each limiting plate having a protrusion that abuts against the trench cover; the connecting block has an adjusting nut connected to it, and the output end of the adjusting nut has a strong magnetic attraction, with a protective cap attached to the adjusting nut. The limiting plate can be inserted below the trench cover to abut against it and prevent it from falling off. The protective cap can be adjusted using the adjusting nut so that the strong magnetic attraction is below it, allowing for magnetic attraction. When removal is needed, simply move the protective cap using the adjusting nut until it is below the trench cover.

[0011] Preferably, the connecting frame is provided with an adjusting screw that is sleeved to the connecting frame, and the adjusting screw is provided with a movable sleeve that moves laterally along the adjusting screw. The movable sleeve is provided with a connecting rod that is connected to a limiting plate and drives the limiting plate to adjust its angle. The rotation of the adjusting screw is adjusted by a handle. The outside of the connecting frame is provided with an adjusting screw limiting member for limiting the rotation of the adjusting screw. The outside of the connecting frame is provided with a limiting telescopic rod that is connected to an adjustable telescopic rod and limits the angle adjustment of the adjustable telescopic rod. The strong magnetic attraction is provided in the protective cover, and the height of the strong magnetic attraction is less than the height of the protective cover.

[0012] Preferably, the limiting structure includes a placement box and a limiting box. The placement box has a movable plate that moves up and down along the placement box and is inserted into the limiting box. The limiting box has a limiting nut for locking the movable plate.

[0013] Preferably, the placement box is installed at the end of the positioning plate, the limiting box is installed on the connecting frame and corresponds to the placement box, the placement box is provided with a plurality of limiting rollers for guiding and limiting the movement of the moving plate, and the lowermost end of the moving plate is provided with a groove that matches the limiting nut.

[0014] Preferably, the connecting frame is further provided with a control handle on the outside, the positioning plate is provided with a hook lifting lug, and the length of the lifting fixture is greater than the length of the trench cover.

[0015] Working steps for lifting trench covers using lifting equipment:

[0016] During operation, the position of the positioning plate is initially adjusted according to the specifications of the trench cover to be hoisted. After adjustment, it is inserted into the trench cover. Then, the hoisting rope of the crane is installed on the hook lifting lug. Afterward, the connecting frame is moved by controlling the control handle. Before moving, the adjustable telescopic rod is adjusted to facilitate strong magnetic attraction and contact between the protective sleeve and the ground or other trench covers, making it easy to move. After being inserted into the trench cover, the position of the positioning plate is further controlled by the micro servo motor, so that the connecting frame contacts the bottom of the trench cover and the positioning plate contacts the upper surface of the trench cover. Then, the adjusting screw is adjusted by the handle. When the adjusting screw rotates, it drives the movable sleeve to move laterally, thereby driving the limit plate to adjust the angle, so that the protrusion of the limit plate fits tightly with the lower end of the trench cover. Then, the crane is used to move it a certain distance. After moving it, the movable plate is inserted into the groove of the limit box to facilitate the positioning of the trench cover and prevent it from falling during the movement.

[0017] Compared with existing technologies, this invention has the advantages of high auxiliary function, stable and quick installation, and greatly improves the stability of trench cover hoisting, avoiding the risk of trench cover falling during hoisting, and greatly protecting the personal safety of operators. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 For the present invention Figure 1 A schematic diagram of the structure in cross-section from the middle side;

[0020] Figure 3 For the present invention Figure 2 A schematic diagram of the structure on the back side;

[0021] Figure 4 This is a schematic diagram of the trench cover of the present invention;

[0022] Figure 5 This is a schematic diagram of the limiting structure of the present invention;

[0023] Figure 6 This is a schematic diagram of the internal structure of the placement box of the present invention.

[0024] In the diagram: 1. Lifting fixture; 2. Connecting frame; 3. Positioning plate; 4. Handle; 5. Limiting plate; 6. Adjustable telescopic rod; 7. Connecting block; 9. Displacement adjustment structure; 10. Toothed belt; 11. Gear; 12. Micro servo motor; 13. Limiting component; 14. Protrusion; 15. Adjusting screw; 16. Movable sleeve; 17. Connecting rod; 18. Adjusting screw limiting component; 19. Limiting telescopic rod; 20. Adjusting nut; 21. Strong magnetic attraction; 22. Protective cover; 23. Control handle; 24. Lifting lug; 25. Trench cover; 26. Limiting structure; 27. Placement box; 28. Limiting box; 29. ​​Limiting nut; 30. Groove; 31. Moving plate; 32. Limiting roller. Detailed Implementation

[0025] 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.

[0026] Please see Figures 1 to 6This invention provides a technical solution: a trench cover lifting fixture, including a lifting fixture 1, a connecting frame 2, a control handle 23 on the outside of the connecting frame 2, a hook lifting lug 24 on the positioning plate 3, the length of the lifting fixture 1 being greater than the length of the trench cover 25, the connecting frame 2 having two spaced-apart limiting plates 5, each limiting plate 5 having a protrusion 14 connected to the limiting plate 5 and the protrusion 14 abutting against the trench cover; a connecting block 7 having an adjusting nut 20 connected to the connecting block 7, and the output end of the adjusting nut 20... The device is equipped with a strong magnetic attraction 21, and a protective cover 22 connected to the adjusting nut 20. The connecting frame 2 is equipped with an adjusting screw 15 that is shaft-sleeved connected to the connecting frame 2. The adjusting screw 15 is equipped with a movable sleeve 16 that moves laterally along the adjusting screw 15. The movable sleeve 16 is equipped with a connecting rod 17 that is connected to the limiting plate 5 and drives the limiting plate 5 to adjust the angle. The rotation of the adjusting screw 15 is adjusted by the handle 4. The outside of the connecting frame 2 is equipped with an adjusting screw limiting member 18 for limiting the rotation of the adjusting screw 15.The connecting frame 2 has an external limiting telescopic rod 19 connected to the adjustable telescopic rod 6 and limiting the angle adjustment of the adjustable telescopic rod 6. A strong magnetic magnet 21 is installed in the protective cover 22, and the height of the strong magnetic magnet 21 is less than the height of the protective cover 22. The connecting frame 2 has a positioning plate 3 that moves up and down slightly along the connecting frame 2, and the connecting frame 2 and the positioning plate 3 are used to position the trench cover. The positioning plate 3 slides along the track of the connecting frame 2. The external part of the connecting frame 2 is connected to the positioning plate 3. The displacement adjustment structure 9 is used to adjust the up-and-down movement of the positioning plate 3. The displacement adjustment structure 9 includes a toothed belt 10 connected to the positioning plate 3. The connecting frame 2 is provided with a gear 11 that meshes with the toothed belt 10 and can drive the toothed belt 10 to move up and down. The rotation of the gear 11 is driven by a micro servo motor 12. The connecting frame 2 is provided with a limiting member 13 for limiting the up-and-down movement of the toothed belt 10. The lifting fixture 1 is also provided with a limiting structure 2 for limiting the trench cover 25. 6. The limiting structure 26 includes a placement box 27 and a limiting box 28. The placement box 27 contains a movable plate 31 that moves vertically along the placement box 27 and is inserted into the limiting box 28. The limiting box 28 contains a limiting nut 29 for locking the movable plate 31. The placement box 27 is installed at the end of the positioning plate 3. The limiting box 28 is installed on the connecting frame 2 and corresponds to the placement box 27. The placement box 27 contains multiple limiting rollers 32 for guiding and limiting the movement of the movable plate 31. The bottom of component 1 has a groove 30 that matches the limiting nut 29. The placement box 27 has two symmetrically arranged limiting rollers 32, and a moving plate 31 is positioned between the two limiting rollers 32. The connecting frame 2 has at least one limiting plate 5 that is angle-adjustable along the connecting frame 2, and this limiting plate 5 abuts against the trench cover 25. The outside of the connecting frame 2 has an adjustable telescopic rod 6 that is bearing-connected to the connecting frame 2, and the output end of the adjustable telescopic rod 6 has a connecting block 7 for auxiliary support of the connecting frame 2.

[0027] The electrical components mentioned in this article are all connected to an external main controller and 380V commercial power supply, and the main controller can be a conventional known device such as a computer that can control it.

[0028] In the description of this specification, the terms "connection", "installation", "fixing", "setting", etc. are interpreted broadly. For example, "connection" means a fixed connection or an indirect connection through an intermediate component without affecting the relationship between components and the technical effect. It can also mean an integral connection or a partial connection. For those skilled in the art, the specific meaning of the above terms in this invention or invention can be understood according to the specific circumstances.

[0029] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A lifting fixture for trench covers, comprising a lifting fixture (1), characterized in that: The lifting fixture (1) includes a connecting frame (2), in which a positioning plate (3) is provided for small vertical displacement along the connecting frame (2), and the connecting frame (2) and the positioning plate (3) are used to position the trench cover. The lifting fixture (1) also includes a limiting structure (26) for limiting the trench cover (25). The connecting frame (2) includes at least one limiting plate (5) for angle adjustment along the connecting frame (2), and the limiting plate (5) abuts against the trench cover (25). The outside of the connecting frame (2) is provided with an adjustable telescopic rod (6) that is connected to the connecting frame (2) in a bearing manner, and the output end of the adjustable telescopic rod (6) is provided with an auxiliary support for the connecting frame (2). Connecting block (7); The positioning plate (3) slides along the track of the connecting frame (2). The outside of the connecting frame (2) is provided with a displacement adjustment structure (9) connected to the positioning plate (3) and used to adjust the up and down movement of the positioning plate (3). The displacement adjustment structure (9) includes a toothed belt (10) connected to the positioning plate (3). The outside of the connecting frame (2) is provided with a gear (11) that meshes with the toothed belt (10) and can drive the toothed belt (10) to move up and down. The connecting frame (2) is provided with an adjusting screw (15) that is shaft-sleeved connected to the connecting frame (2). The adjusting screw (15) is provided with a movable sleeve (16) that moves laterally along the adjusting screw (15). 6) A connecting rod (17) is provided on the upper part, which is connected to the limiting plate (5) and drives the limiting plate (5) to adjust the angle. The rotation of the adjusting screw (15) is adjusted by the handle (4). The outer part of the connecting frame (2) is provided with an adjusting screw limiting member (18) for limiting the rotation of the adjusting screw (15). The outer part of the connecting frame (2) is provided with a limiting telescopic rod (19) connected to the adjusting telescopic rod (6) and limiting the angle adjustment of the adjusting telescopic rod (6). The connecting frame (2) is provided with two limiting plates (5) arranged at intervals. The limiting plate (5) is provided with a protrusion (14) connected to the limiting plate (5) and the protrusion (14) abuts against the trench cover. The connecting block (7) is provided with an adjusting nut (20) connected to the connecting block (7) and the connecting end of the adjusting nut (20) is provided with a strong magnet (21). The adjusting nut (20) is provided with a protective cover (22) connected to the adjusting nut (20). The strong magnet (21) is provided in the protective cover (22). The height of the strong magnet (21) is less than the height of the protective cover (22). The limiting structure (26) includes a placement box (27) and a limiting box (28). The placement box (27) is provided with a moving plate (31) that moves up and down along the placement box (27) and is inserted into the limiting box (28). The limiting box (28) is provided with a limiting nut (29) for locking the moving plate (31).

2. The trench cover lifting fixture according to claim 1, characterized in that: The rotation of the gear (11) is driven by a micro servo motor (12), and the outside of the connecting frame (2) is provided with a limiting member (13) for limiting the up and down movement of the toothed belt (10).

3. The trench cover lifting fixture according to claim 1, characterized in that: The placement box (27) is installed at the end of the positioning plate (3), and the limiting box (28) is installed on the connecting frame (2) and corresponds to the placement box (27). The placement box (27) is provided with a plurality of limiting rollers (32) for guiding and limiting the movement of the moving plate (31). The lowermost end of the moving plate (31) is provided with a groove (30) that is compatible with the limiting nut (29).

4. The trench cover lifting fixture according to claim 1, characterized in that: The placement box (27) is provided with two symmetrically arranged limiting rollers (32) and the moving plate (31) is arranged between the two limiting rollers (32).

5. The trench cover lifting fixture according to claim 1, characterized in that: The connecting frame (2) is also provided with a control handle (23) on the outside, and the positioning plate (3) is provided with a hook lifting lug (24). The length of the lifting fixture (1) is greater than the length of the trench cover (25).

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