A ring expander for cement pipes

Abstract

The utility model discloses a kind of ring expanding devices for cement pipe, including first annular rib, second annular rib and ring expanding steel plate, the inner diameter of first annular rib is same with the inner diameter of second annular rib, the outer diameter of first annular rib is less than the outer diameter of second annular rib, first annular rib is located above second annular rib and first annular rib is parallel with second annular rib, the center of first annular rib and second annular rib is on same axis;Ring expanding steel plate is arranged between first annular rib and second annular rib, ring expanding steel plate is vertically fixedly connected with first annular rib and second annular rib respectively, forming integrated ring expanding structure of first annular rib, second annular rib and ring expanding steel plate;Four lifting lugs are evenly arranged in clamping groove, and four lifting lugs are vertically fixedly connected with clamping groove.The utility model is compact in structure, simple in manufacture, convenient to use, and improves the forming quality of cement pipe mouth and the reliability of on-site installation butt joint.

Description

Technical Field

[0001] This utility model belongs to the field of cement pipe manufacturing technology, specifically relating to an expansion ring device for cement pipes. Background Technology

[0002] In the manufacturing process of cement pipes, the roundness and dimensional accuracy of the pipe ends directly affect the quality of subsequent pipe connection and installation. Traditional cement pipes, after molding and demolding, are prone to problems such as excessive ovality, localized dents, or slight deformation at the pipe ends. This leads to difficulties in aligning adjacent pipes during on-site installation, inadequate sealing, and even the need for manual adjustments, severely impacting construction efficiency and project quality. Currently, some manufacturers use simple circular steel rings or wooden supports for temporary shaping of the pipe ends. However, these methods lack uniform tension distribution, cannot effectively correct the roundness of the pipe ends, and are prone to detachment during hoisting and transportation, making them inconvenient to use.

[0003] Therefore, there is an urgent need for a cement pipe end shaping device that is simple in structure, has uniform tension, and is easy to hoist and transport, in order to improve the product quality of cement pipes and the reliability of on-site installation. Utility Model Content

[0004] This utility model addresses the above-mentioned problems and overcomes the shortcomings of the existing technology by providing a ring expansion device for cement pipes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution.

[0006] This utility model provides a cement pipe expansion ring device, including a first annular reinforcing plate, a second annular reinforcing plate, and an expansion ring steel plate. The inner diameter of the first annular reinforcing plate is the same as that of the second annular reinforcing plate, and the outer diameter of the first annular reinforcing plate is smaller than that of the second annular reinforcing plate. The first annular reinforcing plate is located above the second annular reinforcing plate and is parallel to the second annular reinforcing plate. The centers of the first annular reinforcing plate and the second annular reinforcing plate are on the same axis. An expansion ring steel plate is provided between the first annular reinforcing plate and the second annular reinforcing plate. The expansion ring steel plate is perpendicularly fixed to the first annular reinforcing plate and the second annular reinforcing plate, thereby forming an integrated expansion ring structure of the first annular reinforcing plate, the second annular reinforcing plate, and the expansion ring steel plate. Four lifting lugs are evenly arranged in the groove of the integrated expansion ring structure formed by the first annular reinforcing plate, the second annular reinforcing plate, and the expansion ring steel plate. All four lifting lugs are perpendicularly fixed to the groove.

[0007] Furthermore, the expansion ring steel plate is a circular structure made from a long strip of steel plate by a rolling machine, and a butt joint gap is formed at the joint of the two ends of the long strip of steel plate, the butt joint gap being less than or equal to 0.2mm.

[0008] Furthermore, the four lifting lugs are arranged in a cross shape within the clamping groove.

[0009] Furthermore, each of the four lifting lugs is provided with a hanging hole.

[0010] Furthermore, at least three tensioning top plates are evenly spaced in the clamping groove between two adjacent lifting lugs, and each tensioning top plate is vertically fixedly connected in the clamping groove.

[0011] Furthermore, the outer apex of the tensioning top plate is inclined to the outside of the clamping groove, and the outer apex of the tensioning top plate is rounded.

[0012] The beneficial effects of this utility model are:

[0013] The expansion ring device for cement pipes provided by this utility model consists of two annular reinforcing plates with different inner and outer diameters forming an integrated expansion ring structure with an expansion ring steel plate. This structure can apply a uniform radial tension force to the cement pipe opening from the inside, effectively correcting the ovality and local deformation of the pipe opening. The butt joint gap of the expansion ring steel plate is controlled within 0.2mm, ensuring the overall structural strength and roundness accuracy of the expansion ring. The lifting lugs set in the clamping groove facilitate lifting and handling, and the rounded corner design on the outer side of the tensioning top plate can stably support the inner wall of the pipe opening while avoiding scratching the surface of the cement pipe. The overall structure is compact, simple to manufacture, and easy to use, improving the forming quality of the cement pipe opening and the reliability of on-site installation and connection. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of an expansion ring device for cement pipes according to this utility model.

[0015] Figure 2 This is a top view schematic diagram of an expansion ring device for cement pipes according to this utility model.

[0016] Figure 3 This is a side view of the expansion ring device for cement pipes according to this utility model.

[0017] Figure 4 This is a schematic diagram of the expansion ring steel plate structure of an expansion ring device for cement pipes according to this utility model.

[0018] Figure 5 This is a schematic diagram of the structure of the expansion ring steel plate of the expansion ring device for cement pipes, which unfolds into a long strip steel plate.

[0019] Figure 6 This is a schematic diagram of the tensioning top plate of a cement pipe expansion ring device according to this utility model.

[0020] Figure 7 This is a schematic diagram of the lifting lug of a cement pipe expansion ring device according to the present invention.

[0021] The markings in the diagram are as follows: 1 is the second annular reinforcing bar, 2 is the first annular reinforcing bar, 3 is the butt joint, 4 is the tensioning top plate, 5 is the lifting lug, 6 is the clamping groove, 7 is the expansion ring steel plate, 8 is the outer top corner, and 9 is the hanging hole. Detailed Implementation

[0022] To make the technical problems solved, the technical solutions, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] Combination Figures 1 to 7 As shown in the embodiment of this utility model, a cement pipe expansion ring device includes a first annular reinforcing plate 2, a second annular reinforcing plate 1, and an expansion ring steel plate 7. The inner diameter of the first annular reinforcing plate 2 is the same as the inner diameter of the second annular reinforcing plate 1, and the outer diameter of the first annular reinforcing plate 2 is smaller than the outer diameter of the second annular reinforcing plate 1. The first annular reinforcing plate 2 is positioned above the second annular reinforcing plate 1 and is parallel to the second annular reinforcing plate 1. The centers of the first annular reinforcing plate 2 and the second annular reinforcing plate 1 are on the same axis. An expansion ring steel plate 7 is provided between the first annular reinforcing plate 2 and the second annular reinforcing plate 1, and the expansion ring steel plate 7 is vertically fixedly connected to the first annular reinforcing plate 2 and the second annular reinforcing plate 1, thereby forming an integrated expansion ring structure of the first annular reinforcing plate 2, the second annular reinforcing plate 1, and the expansion ring steel plate 7. Specifically, the expansion ring steel plate 7 is vertically connected to the first annular reinforcing plate 2 and the second annular reinforcing plate 1, which enables the entire expansion ring device to have sufficient radial stiffness and axial stability, and can generate a uniform expansion force on the inner wall of the cement pipe opening, effectively correcting the roundness of the pipe opening.

[0024] Four lifting lugs 5 are evenly arranged within the clamping groove 6 of the integrated expansion ring structure formed by the first annular reinforcing rib 2, the second annular reinforcing rib 1, and the expansion ring steel plate 7. All four lifting lugs 5 are vertically and fixedly connected to the clamping groove 6. Specifically, the lifting lugs 5 provide reliable connection points for lifting and handling. The even distribution of the four lifting lugs 5 ensures the balance of force on the expansion ring and the cement pipe during lifting, preventing tilting or slippage and improving operational safety.

[0025] Preferably, the expansion ring steel plate 7 is a circular structure made from a long strip of steel plate by a rolling machine. A butt joint gap 3 is formed at the two ends of the long strip of steel plate. The butt joint gap 3 is less than or equal to 0.2 mm and is sealed by welding. Specifically, the rolling machine ensures the roundness accuracy of the expansion ring steel plate 7. The extremely small butt joint gap 3, combined with the welding seal, makes the expansion ring steel plate 7 form a closed rigid ring, which can withstand a large radial expansion force without opening deformation, ensuring a long-lasting tightening effect on the pipe opening.

[0026] Preferably, the four lifting lugs 5 are arranged in a cross shape within the clamping groove 6; specifically, the cross-shaped arrangement ensures that the center of gravity is centered during lifting, and the expansion ring device can maintain a horizontal posture regardless of whether single-point or multi-point lifting is used, making it convenient to insert or remove the expansion ring device from the cement pipe opening.

[0027] Preferably, each of the four lifting lugs 5 is provided with a lifting hole 9; specifically, the lifting hole 9 can be easily connected to a hook, wire rope or sling, avoiding wear of the rope by the edge of the lug. At the same time, the lifting hole 9 can be made in different specifications, and can be adapted to lifting equipment of different tonnages, with strong versatility.

[0028] Preferably, three tensioning top plates 4 are evenly spaced within the groove 6 between two adjacent lifting lugs 5, with each tensioning top plate 4 vertically fixed within the groove 6. Specifically, the tensioning top plates 4 are evenly and densely distributed circumferentially, providing multi-point support to the inner wall of the pipe opening, resulting in a more uniform distribution of tension force and effectively eliminating local depressions or elliptical deformations at the pipe opening. The spacing and number of tensioning top plates 4 can be adjusted according to the diameter of the cement pipe, making it widely applicable.

[0029] Preferably, the outer apex 8 of the tensioning top plate 4 is inclined outward towards the groove 6, and the outer apex 8 of the tensioning top plate 4 is rounded. The rounded part of the tensioning top plate 4 is used to contact and support the inner diameter of the cement pipe opening, preventing slight deformation of the inner diameter of the pipe opening, thereby avoiding the problem of cement pipes not being able to connect during on-site installation. Among them, the inclined outer apex 8 makes the tensioning top plate 4 form a line contact or a small area contact with the inner wall of the pipe opening, increasing the contact pressure and improving the tensioning effect; the rounded corner treatment avoids sharp edges scratching the inner wall of the cement pipe, protecting the surface quality of the pipe opening, and at the same time, the rounded corner structure makes insertion and removal smoother and less prone to jamming.

[0030] When using the expansion ring device for cement pipes of this invention, first lift the entire expansion ring device with the second annular reinforcing plate 1 facing downwards and the first annular reinforcing plate 2 facing upwards. Slowly insert the expansion ring device into the cement pipe opening from above. The outer apex 8 of the tightening top plate 4 will make tight contact with the inner wall of the pipe opening, applying a radial expansion force to the pipe opening and correcting its roundness. This device is reusable and can improve the finished product qualification rate of cement pipe openings and the efficiency of on-site installation.

[0031] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. A collar device for a cement pipe, characterized by: The structure includes a first annular rib, a second annular rib, and an expansion ring steel plate. The inner diameter of the first annular rib is the same as that of the second annular rib, and the outer diameter of the first annular rib is smaller than that of the second annular rib. The first annular rib is positioned above the second annular rib and is parallel to it. The centers of the first and second annular ribs are on the same axis. An expansion ring steel plate is placed between the first and second annular ribs and is perpendicularly fixed to both the first and second annular ribs, forming an integrated expansion ring structure. Four lifting lugs are evenly arranged within the groove of the integrated expansion ring structure formed by the first annular rib, the second annular rib, and the expansion ring steel plate. All four lifting lugs are perpendicularly fixed to the groove.

2. A jacking ring assembly for a concrete pipe according to claim 1, wherein: The expansion ring steel plate is a circular structure made from a long strip of steel plate by a rolling machine. A butt joint gap is formed at the two ends of the long strip of steel plate, and the butt joint gap is less than or equal to 0.2mm.

3. A jacking ring assembly for a concrete pipe according to claim 1, wherein: Each of the four lifting lugs is provided with a hanging hole.

4. A jacking ring assembly for a concrete pipe according to claim 1, wherein: At least three tensioning top plates are evenly spaced in the clamping groove between two adjacent lifting lugs, and each tensioning top plate is vertically fixedly connected in the clamping groove.

5. A jacking ring assembly for a concrete pipe according to claim 4, wherein: The outer corner of the tensioning top plate is inclined to the outside of the clamping groove, and the outer corner of the tensioning top plate is rounded.

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