A high-stability combined lifting appliance

Abstract

This utility model discloses a convenient plug-in high-stability combined lifting device, relating to the field of ductile iron jacking pipe production technology. The utility model includes a ductile iron jacking pipe with a fixed pushing flange, and a lifting frame with chains fixed on both sides. The pushing flange has two symmetrical insertion holes. Each chain has a plate at its lower end that mates with the insertion hole. Each plate has a bearing member fixed at its bottom that abuts against the pushing flange. Each plate also has a limiting mechanism for filling the gap between the plate and the ductile iron jacking pipe. When the limiting mechanism is inserted into the gap, the bearing member supports the pushing flange. The plate and bearing member are laterally clamped after passing through the insertion hole, and together with the limiting plate, they fill the gap between the plate and the ductile iron jacking pipe, forming a rigid clamping fixation. This ensures uniform force distribution and no loosening gaps, avoiding the safety hazards of traditional hooks that are prone to shaking and slippage due to single-point force application. It allows for easier operation between the ductile iron jacking pipe and the mold, avoiding damage to the cement and pipe wall.

Description

Technical Field

[0001] This utility model relates to the field of ductile iron jacking pipe production technology, specifically to a convenient plug-in high-stability combined lifting tool. Background Technology

[0002] Ductile iron jacking pipes are the core pipe material for trenchless underground pipeline construction. Manufactured through spheroidizing treatment, they possess advantages such as high strength, good toughness, and corrosion resistance, and are widely used in municipal pipeline networks and other projects. Their production process is standardized and mainly includes: raw material preparation and prefabrication of ductile iron pipes, pre-treatment for jacking flange installation, reinforcement mesh layout, concrete pouring, curing, demolding and repair, grinding, and anti-corrosion treatment. During production, the ductile iron jacking pipes need to be hoisted. The jacking flange installed at the end of the ductile iron jacking pipe is used both for pipe positioning and as a load-bearing structure for hoisting.

[0003] When pouring concrete for ductile iron jacking pipes, the jacking pipe with the jacking flange needs to be hoisted into the casting mold first. After production, the jacking pipe and the outer ring of concrete need to be hoisted out of the mold together. Currently, the industry generally uses hoisting clamps or hooks for hoisting. However, the large size of the hoisting device makes it difficult to put the pipe into the mold. Moreover, when installing and dismantling the jacking pipe, the gap between the flange on the jacking pipe and the outer mold is small. The hooks or hoisting clamps are inconvenient to operate in the narrow space, which can easily cause the clamp jaws to damage the inner lining cement and the pipe wall. Furthermore, the hoisting device is prone to loosening when the jacking pipe changes from a horizontal to a vertical position. During the hoisting process, inaccurate positioning can also easily occur, causing the stress point to deviate from the center of gravity of the jacking pipe and resulting in swaying. Utility Model Content

[0004] The purpose of this invention is to provide a convenient plug-in high-stability combined lifting device to overcome the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a convenient plug-in high-stability combined lifting device, including a ductile iron jacking pipe with a fixed push flange, and a lifting frame, with chains fixedly installed on both sides of the lifting frame; the push flange has two symmetrical insertion holes, and each chain has an insertion plate at its lower end that mates with the insertion hole; each insertion plate has a bearing member fixedly installed at its bottom that abuts against the push flange; each insertion plate also has a limiting mechanism for filling the gap between the insertion plate and the ductile iron jacking pipe, and when the limiting mechanism is inserted into the gap, the bearing member supports the push flange.

[0006] Preferably, the support member is a rectangular plate fixedly installed at the bottom of the insert plate.

[0007] Preferably, the bottom of both sides of the insert plate is provided with a slope.

[0008] Preferably, the limiting mechanism includes a sliding sleeve, and a limiting plate is fixedly provided on the bottom surface of the sliding sleeve. The sliding sleeve slides in cooperation with the insert plate. When the limiting plate is inserted into the gap, the rectangular plate supports the push flange.

[0009] Preferably, each of the sliding sleeves is provided with a through groove that is compatible with the insert plate.

[0010] Preferably, each of the limiting plates has a slope at its bottom.

[0011] In the above technical solution, this utility model provides a convenient plug-in high-stability combined lifting tool, which has the following beneficial effects: after the plug plate and the bearing component pass through the plug hole, they are horizontally clamped together, and the limiting plate fills the gap between the plug plate and the ductile iron jacking pipe, forming a rigid clamping and fixing, with uniform force and no loose gap, avoiding the safety hazards of traditional hooks being prone to shaking and slipping due to single-point force; the arc surface of the sliding sleeve and the limiting plate fits the outer wall of the ductile iron jacking pipe, making assembly quick and locking reliable; the plug plate can more conveniently operate between the ductile iron jacking pipe and the mold, avoiding damage to the cement and the pipe wall. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0013] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the hoisting frame provided in an embodiment of the present utility model;

[0015] Figure 3 A schematic diagram of the socket structure provided in an embodiment of this utility model;

[0016] Figure 4 Provided for the embodiments of this utility model Figure 3 Enlarged view of the structure at point A in the middle;

[0017] Figure 5 This is a schematic diagram of the insert plate provided in an embodiment of the present utility model.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Ductile iron jacking pipe; 2. Jacking flange; 3. Lifting frame; 4. Chain; 10. Insertion hole; 11. Insertion plate; 12. Rectangular plate; 13. Sliding sleeve; 14. Limiting plate; 15. Through groove. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0021] Please see Figure 1-4 A convenient, high-stability combined lifting device is proposed. The technical solution includes a ductile iron jacking pipe 1 with a fixedly mounted push flange 2, and a lifting frame 3. Chains 4 and distance adjustment holes for adjusting the position of the material strips 4 are fixedly mounted on both sides of the lifting frame 3. Two symmetrical insertion holes 10 are provided on the push flange 2. Each chain 4 has an insertion plate 11 at its lower end that mates with the insertion hole 10. A bearing member that abuts against the push flange 2 is fixedly mounted at the bottom of each insertion plate 11. A limiting mechanism for filling the gap between the insertion plate 11 and the ductile iron jacking pipe 1 is also provided on each insertion plate 11. When the limiting mechanism is inserted into the gap, the bearing member supports the push flange 2. The ductile iron jacking pipe 1 is used to produce cement socket pipes. The push flange 2 is welded to the ductile iron jacking pipe 1, and the lifting frame 3 is installed with a gantry crane. This is existing technology and will not be elaborated further. The long side of the insertion hole 10 is adapted to the width of the insertion plate 11. When the insertion plate 11 is inserted into the insertion hole 10, the gap between the two sides of the insertion plate 11 and the insertion hole 10 is small, and the sum of the thicknesses of the insertion plate 11 and the carrier is adapted to the short side of the insertion hole 10. When hoisting the ductile iron jacking pipe 1, each insertion plate 11 is attached to the outer wall of the ductile iron jacking pipe 1 and aligned with the insertion hole 10. Then, it is lowered to insert the insertion plate 11 into the insertion hole 10. The bottom of the insertion plate 11 and the carrier both pass through the corresponding insertion hole 10. At this time, the limiting mechanism is above the insertion hole 10. Then, the limiting mechanism is moved towards the insertion hole 10. The limiting mechanism fills the gap between the insertion plate 11 and the ductile iron jacking pipe 1, thereby fixing the insertion plate 11 in the insertion hole 10. Each insert plate 11 is fixedly connected to the chain 4 in a one-to-one manner. The bottom of the chain 4 is fixed to the top of the insert plate 11. The gantry crane lifts each insert plate 11 through the lifting frame 3 and the chain 4, thereby lifting the ductile iron jacking pipe 1. After the insert plate 11 is inserted into the rectangular insertion hole 10, it is horizontally clamped and the bearing component is pressed against the bottom surface of the push flange 2. Then, it is locked by the limiting mechanism, forming a rigid clamping connection. During the lifting process, the posture of the ductile iron jacking pipe 1 is more stable, greatly reducing the risk of shaking, collision and falling. At the same time, the insert plate 11 and the bearing component will not protrude from the outer circumference of the push flange 2 during lifting, which can avoid interference with the inner wall of the mold and make it easier for workers to perform operations such as disassembly and assembly of lifting tools in a limited space.

[0022] Specifically, the supporting component is a rectangular plate 12 fixedly installed at the bottom of the insert plate 11; the thickness of the rectangular plate 12 and the insert plate 11 is adapted to the width of the insertion hole 10. After the insert plate 11 and the rectangular plate 12 pass through the insertion hole 10, the insert plate 11 is moved so that the insert plate 11 abuts against the inner wall of the insertion hole 10 away from the ductile iron jacking pipe 1. At this time, the limiting mechanism is put on the insert plate 11. When it moves upward, the rectangular plate 12 will abut against the bottom of the jacking flange 2.

[0023] Specifically, the bottom of both sides of the insert plate 11 is provided with a slope; the width of the insert plate 11 is slightly smaller than the length of the rectangular socket 10, making it inconvenient to position during installation. By using the slope at the bottom of the insert plate 11, even if the insert plate 11 is not completely aligned with the socket 10 when inserting the insert plate 11, the slope can be used to move the insert plate 11 to the correct position.

[0024] Specifically, the limiting mechanism includes a sliding sleeve 13, with a limiting plate 14 fixedly installed on the bottom surface of the sliding sleeve 13. The sliding sleeve 13 and the insert plate 11 slide together. When the limiting plate 14 is inserted into the gap, the rectangular plate 12 supports the jacking flange 2. The through groove 15 of the sliding sleeve 13 is adapted to the insert plate 11. The side of the sliding sleeve 13 and the limiting plate 14 near the ductile iron jacking pipe 1 is set as an arc surface adapted to the outer peripheral surface of the ductile iron jacking pipe 1. In the initial state, the sliding sleeve 13 is fitted onto the chain 4, and the chain 4 can pass through the through groove 15. When the insert plate 11 is inserted into the insertion hole 10, the sliding sleeve 13 on the chain 4 is moved downward and fitted onto the insert plate 11. Then, the sliding sleeve 13 is moved downward to insert the limiting plate 14 into the gap between the insert plate 11 and the ductile iron jacking pipe 1, thereby locking the insert plate 11. The gap between the insert plate 11 and the insertion hole 10 is relatively large during the initial installation, which facilitates installation. After the sliding sleeve 13 locks the insert plate 11, it can improve the stability of the insert plate 11 during hoisting.

[0025] Specifically, each sliding sleeve 13 is provided with a through groove 15 that is adapted to the insert plate 11.

[0026] Specifically, each limiting plate 14 has a beveled bottom; when the insert plate 11 abuts against the inner wall of the insertion hole 10 away from the ductile iron jacking pipe 1, the thickness of the limiting plate 14 is just enough to fill the gap between the insert plate 11 and the ductile iron jacking pipe 1. When the sliding sleeve 13 is moved down, the beveled bottom of the limiting plate 14 abuts against the insert plate 11, making it easy to insert the limiting plate 14 between the insert plate 11 and the ductile iron jacking pipe 1.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A convenient plug-in high-stability combined lifting device, comprising a ductile iron jacking pipe (1) with a fixedly installed jacking flange (2), characterized in that, It also includes a hoisting frame (3), on both sides of which chains (4) are fixedly installed; The push flange (2) has two symmetrical insertion holes (10). Each chain (4) has an insertion plate (11) at its lower end that mates with the insertion hole (10). Each insertion plate (11) has a support member fixedly installed at its bottom that abuts against the push flange (2). Each insertion plate (11) also has a limiting mechanism for filling the gap between the insertion plate (11) and the ductile iron jacking pipe (1). When the limiting mechanism is inserted into the gap, the support member carries the push flange (2).

2. The plug-in high-stability combined lifting device according to claim 1, characterized in that, The support member is a rectangular plate (12) fixedly installed at the bottom of the insert plate (11).

3. The plug-in high-stability combined lifting device according to claim 2, characterized in that, The bottom of both sides of the insert plate (11) is provided with a slope.

4. The plug-in high-stability combined lifting device according to claim 2, characterized in that, The limiting mechanism includes a sliding sleeve (13), and a limiting plate (14) is fixedly provided on the bottom surface of the sliding sleeve (13). The sliding sleeve (13) slides in cooperation with the insert plate (11). When the limiting plate (14) is inserted into the gap, the rectangular plate (12) carries the push flange (2).

5. A plug-in type high-stability combined lifting device according to claim 4, characterized in that, Each of the sliding sleeves (13) is provided with a through groove (15) that is adapted to the insert plate (11).

6. A plug-in high-stability combined lifting device according to claim 4, characterized in that, Each of the aforementioned limiting plates (14) has a slope at its bottom.

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