Lifting appliance for nodular cast iron pipe

Abstract

The utility model discloses a lifting appliance for nodular cast iron pipes, which comprises a nodular cast iron pipe body, positioning structures and an assembling component, and relates to the technical field of lifting tools, the positioning structures are arranged at the two ends of the nodular cast iron pipe body and comprise two end part limiting components and internal supporting components arranged on the opposite surfaces of the two end part limiting components; and the hoisting assembly is arranged on the opposite faces of the two end limiting assemblies, the assembling assembly is arranged between the two positioning assemblies and used for assembling the two positioning structures into a whole, and the assembling assembly comprises two assembling frames, a winding roller rotationally connected to the inner bottom walls of the assembling frames and a first steel rope wound around the surface of the winding roller. The supporting assembly adopts the sliding connection design of a gear rod and a telescopic frame and is matched with a fixing bolt and a multi-gear fixing groove, nodular cast iron pipes with different calibers can be compatible, a worm gear and a worm of the assembling assembly drive a first steel rope to be wound and unwound, the length compensation capacity is provided, and therefore the hoisting requirements of the nodular cast iron pipes with different lengths can be met.

Description

Technical Field

[0001] This utility model relates to the field of lifting tooling technology, and in particular to a lifting tool for ductile iron pipes. Background Technology

[0002] Ductile iron pipes are pipes made by centrifugally casting molten iron of grade 18 or higher with the addition of spheroidizing agents using a centrifugal ductile iron casting machine at high speed. They are also known as ductile iron pipes or ductile cast pipes, and are mainly used for the transportation of tap water, making them an ideal material for tap water pipelines.

[0003] Chinese patent announcement number CN220787807U discloses a lifting device for ductile iron pipes, including a lifting beam with lifting plates at both ends. Each lifting plate is hinged with a lifting hook. The lifting hook is connected to a power mechanism mounted on the lifting beam via a transmission component. Driven by the power mechanism, the transmission component moves to adjust the state of the lifting hook. This invention enables rapid lifting of ductile iron pipes, has a simple structure, is easy to operate, and is highly practical.

[0004] This device achieves rapid lifting by driving the lifting hook with a power mechanism, but its integrated lifting beam design has significant limitations: the lifting beam structure is fixed, making it impossible to adjust the support spacing according to the length of the ductile iron pipe, thus limiting the lifting range and making it difficult to accommodate the operational needs of pipes of different specifications. To address these shortcomings, we propose a lifting device for ductile iron pipes. Summary of the Invention

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a lifting tool for ductile iron pipes.

[0006] To address the problems existing in the prior art, this utility model adopts the following technical solution: a lifting device for ductile iron pipes, comprising:

[0007] Ductile iron pipe body;

[0008] The positioning structure is disposed at both ends of the ductile iron pipe body, and includes two end limiting components, an internal support component disposed on the opposite side of the two end limiting components, and a lifting component disposed on the opposite side of the two end limiting components.

[0009] An assembly assembly is disposed between two positioning assemblies for assembling two positioning structures into one unit. It includes two assembly frames, a take-up roller rotatably connected to the bottom wall of the assembly frame, a first steel rope wound around the surface of the take-up roller, a second steel rope fixedly installed on the left end of the assembly frame, and a drive assembly disposed at the upper end of the assembly frame for driving the take-up roller to rotate.

[0010] Preferably, the end limiting assembly includes a telescopic frame, a stop bar slidably connected to the inner wall of the telescopic frame, and a fixing assembly disposed on the surface of the telescopic frame for fixing the stop bar, wherein the opposite sides of the first steel rope and the second steel rope are respectively fixedly connected to the opposite sides of the two telescopic frames.

[0011] Preferably, the fixing component includes a fixing bolt threaded onto the surface of the telescopic frame, and a plurality of fixing grooves equidistantly opened on the surface of the stop bar, wherein the threaded end of the fixing bolt extends to the inner wall of the telescopic frame, and the fixing grooves allow the fixing bolt to pass through.

[0012] Preferably, the internal support assembly includes a protruding block fixedly installed on one side of the telescopic frame, a threaded hole opened on the surface of the protruding block, an adjusting screw threadedly connected to the inner wall of the threaded hole, and a clamping plate rotatably installed on the top of the adjusting screw.

[0013] Preferably, a reinforcing rib is fixedly installed on the surface of the protruding block, and the other end of the reinforcing rib is fixedly connected to the surface of the telescopic frame.

[0014] Preferably, the lifting assembly includes a lifting block fixedly installed at the other end of the telescopic frame, and a lifting hole formed on the surface of the lifting block.

[0015] Preferably, the drive assembly includes a worm gear and a worm shaft rotatably mounted on the upper surface of the assembly frame, wherein the shaft end of the worm gear is fixedly connected to the shaft end of the take-up roller, and an internal hexagon nut is fixedly mounted on one end of the worm shaft.

[0016] Preferably, the opposite faces of the two assembly frames are both set to be arc-shaped.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. The end limiting component adopts a sliding connection design between the stop bar and the telescopic frame, and with the fixing bolts and multi-position fixing grooves, it can be compatible with ductile iron pipes of different diameters. The worm gear of the assembly drives the first steel rope to be wound and released, providing length compensation capability, so as to adapt to the hoisting needs of ductile iron pipes of different lengths.

[0019] 2. The end limiting component abuts against the end face of the pipe through the stop bar, and the internal support component presses against the inner wall of the pipe through the clamping plate, forming a double constraint of end face + inner wall, which prevents the pipe from slipping during hoisting and improves the stability of hoisting. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the present invention. The illustrative embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an undue limitation. In the drawings:

[0021] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0022] Figure 2 This is a cross-sectional view of the present invention;

[0023] Figure 3 This is a three-dimensional schematic diagram of the positioning structure of this utility model;

[0024] Figure 4 This is a three-dimensional schematic diagram of the assembly frame of this utility model.

[0025] The numbers in the diagram are: 10 Ductile iron pipe body, 20 Assembly frame, 21 Winding roller, 22 First steel rope, 23 Second steel rope, 30 Telescopic frame, 31 Stop bar, 40 Fixing bolt, 50 Reinforcing rib, 60 Lifting block, 61 Lifting hole, 70 Worm gear, 71 Worm, 72 Socket head cap nut, 80 Protruding block, 81 Adjusting screw, 82 Clamping plate. Detailed Implementation

[0026] 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.

[0027] Please see Figure 1-4 This utility model provides a technical solution: a lifting tool for ductile iron pipes, comprising: a ductile iron pipe body 10, a positioning structure, and assembly components.

[0028] The positioning structure is set at both ends of the ductile iron pipe body 10, and includes two end limiting components, an internal support component set on the opposite side of the two end limiting components, and a lifting component set on the opposite side of the two end limiting components.

[0029] The end limiting assembly includes a telescopic frame 30, a stop bar 31 slidably connected to the inner wall of the telescopic frame 30, and a fixing assembly provided on the surface of the telescopic frame 30 for fixing the stop bar 31. The fixing assembly includes a fixing bolt 40 threadedly connected to the surface of the telescopic frame 30, and multiple fixing grooves equidistantly opened on the surface of the stop bar 31. The threaded end of the fixing bolt 40 extends to the inner wall of the telescopic frame 30, and the fixing grooves allow the fixing bolt 40 to pass through. Pulling the stop bar 31 can drive the stop bar 31 to slide within the telescopic frame 30, thereby adjusting the extension length of the stop bar 31. After the length is adjusted, the fixing bolt 40 is screwed into the matching fixing groove, thereby fixing the stop bar 31. Therefore, the overall length of the end limiting assembly can be adjusted, and it is compatible with ductile iron pipes of different diameters.

[0030] The internal support assembly includes a protruding block 80 fixedly installed on one side of the telescopic frame 30, a threaded hole on the surface of the protruding block 80, an adjusting screw 81 threadedly connected to the inner wall of the threaded hole, and a retaining plate 82 rotatably installed on the top of the adjusting screw 81. The top of the retaining plate 82 can be designed to be arc-shaped. A reinforcing rib 50 is fixedly installed on the surface of the protruding block 80. The other end of the reinforcing rib 50 is fixedly connected to the surface of the telescopic frame 30. The reinforcing rib 50 is used to improve the stability between the protruding block 80 and the telescopic frame 30. When the protruding block 80 is placed into the ductile iron pipe body 10, the stop bar 31 will contact the end face of the ductile iron pipe body 10. Rotating the adjusting screw 81 can drive the retaining plate 82 to move up and down, thereby driving the upper end of the retaining plate 82 to contact the inner top wall of the ductile iron pipe body 10.

[0031] An assembly assembly is positioned between two positioning assemblies to assemble the two positioning structures into one unit. It includes two assembly frames 20, a take-up roller 21 rotatably connected to the inner bottom wall of the assembly frame 20, a first steel rope 22 wound around the surface of the take-up roller 21, a second steel rope 23 fixedly installed at the left end of the assembly frame 20, and a drive assembly positioned at the upper end of the assembly frame 20 to drive the take-up roller 21 to rotate. The opposing surfaces of the two assembly frames 20 are both arc-shaped. The drive assembly includes a worm gear 7 rotatably mounted on the upper surface of the assembly frame 20. The worm gear 70 and worm wheel 71 are fixedly connected to the shaft end of the take-up roller 21. One end of the worm gear 71 is fixedly installed with an internal hex nut 72. Rotating the internal hex nut 72 can drive the worm gear 71 to rotate (a wrench is required). By using the meshing transmission between the worm wheel 70 and the worm gear 71, the take-up roller 21 can be driven to rotate, thereby winding up the first steel rope 22. The worm wheel 70 and worm gear 71 of the assembly drive the first steel rope 22 to be wound up and unwound, providing length compensation capability, so as to adapt to the hoisting needs of ductile iron pipes of different lengths.

[0032] The lifting assembly includes a lifting block 60 fixedly installed at the other end of the telescopic frame 30, and a lifting hole 61 opened on the surface of the lifting block 60. The opposite sides of the first steel rope 22 and the second steel rope 23 are respectively fixedly connected to the opposite sides of the two telescopic frames 30. When the protruding block 80 is inserted into the ductile iron pipe body 10, after the stop bar 31 contacts the end face of the ductile iron pipe body 10, rotating the internal hexagonal nut 72 can drive the winding roller 21 to wind up the first steel rope 22, thereby utilizing... The first steel rope 22, in conjunction with the second steel rope 23, drives the stop bar 31 to firmly press against the ductile iron pipe body 10. The upper end of the driving stop plate 82 contacts the inner wall of the ductile iron pipe body 10. Then, the external lifting hook passes through the lifting hole 61 to lift the ductile iron pipe body 10. The internal support components press against the inner wall of the pipe through the stop plate 82, forming a double constraint of end face + inner wall, which prevents the pipe from slipping during the lifting process and improves the stability of the lifting.

[0033] Specifically, the working principle and operation method of this utility model are as follows:

[0034] Manually pull out the stop bar 31 to exceed the diameter of the ductile iron pipe body 10 according to the length of the ductile iron pipe body 10, and lock it by inserting the fixing bolt 40 into the corresponding fixing groove to realize the extension and retraction adjustment of the end limit component;

[0035] The protruding blocks 80 of the end limiting components on both sides are inserted into both ends of the ductile iron pipe body 10, and the stop bar 31 abuts against the end face of the ductile iron pipe body 10 to form an axial limit.

[0036] The operator simultaneously rotates the internal hex nut 72, which drives the take-up roller 21 to tighten the first steel rope 22 through the worm gear 70 and worm 71. The second steel rope 23, as the fixed end, forms a reverse tension, causing the telescopic frames 30 on both sides to contract toward the center of the ductile iron pipe body 10, generating an axial preload.

[0037] Rotate the adjusting screw 81 to drive the abutment plate 82 to move upward, so that its upper end is in close contact with the inner top wall of the pipe, eliminating the gap in the inner wall of the pipe;

[0038] The external hook passes through the lifting hole 61 and then lifts the ductile iron pipe body 10.

[0039] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art based on the technical solution and concept of this utility model should be included within the scope of protection of this utility model.

Claims

1. A lifting tool for ductile iron pipes, characterized in that, include: Ductile iron pipe body (10); The positioning structure is set at both ends of the ductile iron pipe body (10), and includes two end limiting components, an internal support component set on the opposite side of the two end limiting components, and a lifting component set on the opposite side of the two end limiting components. The assembly assembly is disposed between two positioning assemblies for assembling the two positioning structures into one unit. It includes two assembly frames (20), a take-up roller (21) rotatably connected to the bottom wall of the inner wall of the assembly frame (20), a first steel rope (22) wound around the surface of the take-up roller (21), a second steel rope (23) fixedly installed on the left end of the assembly frame (20), and a drive assembly disposed at the upper end of the assembly frame (20) for driving the take-up roller (21) to rotate.

2. The lifting tool for ductile iron pipes according to claim 1, characterized in that: The end limiting component includes a telescopic frame (30), a stop bar (31) slidably connected to the inner wall of the telescopic frame (30), and a fixing component provided on the surface of the telescopic frame (30) for fixing the stop bar (31). The opposite sides of the first steel rope (22) and the second steel rope (23) are respectively fixedly connected to the opposite sides of the two telescopic frames (30).

3. A lifting device for ductile iron pipes according to claim 2, characterized in that: The fixing assembly includes a fixing bolt (40) threaded onto the surface of the telescopic frame (30) and a plurality of fixing grooves equidistantly opened on the surface of the stop bar (31), wherein the threaded end of the fixing bolt (40) extends to the inner wall of the telescopic frame (30) and the fixing grooves allow the fixing bolt (40) to pass through.

4. A lifting device for ductile iron pipes according to claim 1, characterized in that: The internal support assembly includes a protruding block (80) fixedly installed on one side of the telescopic frame (30), a threaded hole opened on the surface of the protruding block (80), an adjusting screw (81) threadedly connected to the inner wall of the threaded hole, and a clamping plate (82) rotatably installed on the top of the adjusting screw (81).

5. A lifting device for ductile iron pipes according to claim 4, characterized in that: The surface of the protruding block (80) is fixedly fitted with a reinforcing rib (50), and the other end of the reinforcing rib (50) is fixedly connected to the surface of the telescopic frame (30).

6. A lifting device for ductile iron pipes according to claim 1, characterized in that: The lifting assembly includes a lifting block (60) fixedly installed at the other end of the telescopic frame (30), and a lifting hole (61) opened on the surface of the lifting block (60).

7. A lifting device for ductile iron pipes according to claim 1, characterized in that: The drive assembly includes a worm gear (70) and a worm (71) rotatably mounted on the upper surface of the assembly frame (20), with the shaft end of the worm gear (70) fixedly connected to the shaft end of the take-up roller (21), and an internal hexagonal nut (72) fixedly mounted on one end of the worm (71).

8. A lifting device for ductile iron pipes according to claim 1, characterized in that: The opposing surfaces of the two assembly frames (20) are both set to be arc-shaped.

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