Alloy seamless steel pipe butt joint device

Abstract

The utility model relates to the technical field of seamless steel pipe butt joint, in particular to an alloy seamless steel pipe butt joint device. The alloy seamless steel pipe butt joint device comprises a middle connecting pipe, an abutting backing ring is fixedly embedded in the middle of the middle connecting pipe, and a plurality of annular rubber inner tubes distributed at equal intervals are installed on the inner walls, on the two sides of the abutting backing ring, of the middle connecting pipe. And a one-way air inlet valve is mounted on the annular rubber inner tube. According to the butt joint device for the alloy seamless steel pipes, the annular rubber inner tube is inflated and expanded, gaps between the middle connecting pipe and the alloy seamless steel pipes are rapidly filled, uniform press fit and sealing are achieved, meanwhile, secondary reinforcement is combined with the fastening screw, the connection stability is remarkably improved, and the service life is prolonged. The elastic characteristic of the annular rubber inner tube can effectively absorb vibration energy, the risk of connection failure caused by vibration is reduced, the embedded design of the arc-shaped annular groove and the annular rubber inner tube ensures directional deformation of the inner tube during expansion, and inclusiveness to different pipe diameters is improved.

Description

Technical Field

[0001] This utility model relates to the field of seamless steel pipe butt welding technology, and in particular to a butt welding device for alloy seamless steel pipes. Background Technology

[0002] In the field of seamless steel pipe butt welding technology, traditional connection methods mainly include welding, flange connections, and threaded connections. While welding can achieve high-strength connections, it suffers from problems such as deterioration of material properties in the heat-affected zone, complex operation, and the need for specialized equipment. Flange connections rely on bolt tightening, are bulky, and the sealing surface is susceptible to corrosion. Threaded connections are prone to loosening due to vibration, resulting in insufficient sealing reliability. Furthermore, the mechanical pressing used in existing technologies is not stable enough, causing the steel pipe connection to wobble after prolonged use. Additionally, the lack of a sealing device in the connection device leads to poor sealing at the steel pipe joint.

[0003] Therefore, it is necessary to provide a new alloy seamless steel pipe butt welding device to solve the above-mentioned technical problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a seamless alloy steel pipe butt welding device.

[0005] The alloy seamless steel pipe docking device provided by this utility model includes a central connecting pipe, and an abutting gasket ring is fixedly fitted in the middle of the central connecting pipe. Multiple annular rubber inner tubes are installed on the inner walls of the central connecting pipe on both sides of the abutting gasket ring.

[0006] The annular rubber inner tube is equipped with a one-way air intake valve. The annular rubber inner tube is inflated by the one-way air intake valve, causing it to expand and abut against the outer wall of the alloy seamless steel pipe inserted into the central connecting pipe.

[0007] Preferably, the inner wall of the connecting pipe is provided with multiple annularly distributed arc-shaped grooves, and the outer surface of the annular rubber inner tube is fixedly fitted into the arc-shaped grooves.

[0008] Preferably, each of the annular rubber inner tubes is fixedly equipped with a plurality of annularly distributed one-way air intake valves, and the one-way air intake valves penetrate the wall of the central connecting pipe and extend out of the central connecting pipe.

[0009] Preferably, the outer wall of the connecting pipe has several annular grooves corresponding to the arc-shaped annular grooves, and the one-way air intake valve is located in the annular grooves.

[0010] Preferably, the pipe wall near both ends of the connecting pipe is provided with multiple annular and radially distributed threaded holes, and each threaded hole is provided with a threaded fastening screw.

[0011] Preferably, rubber gaskets are fixedly fitted onto both sides of the abutment ring.

[0012] Compared with related technologies, the alloy seamless steel pipe butt welding device provided by this utility model has the following advantages:

[0013] This invention utilizes an inflatable annular rubber inner tube to quickly fill the gap between the connecting pipe and the seamless alloy steel pipe, achieving uniform pressing and sealing. Simultaneously, the addition of a secondary reinforcement with fastening screws significantly improves connection stability. Furthermore, the elastic properties of the annular rubber inner tube effectively absorb vibration energy, reducing the risk of connection failure due to vibration. The interlocking design of the arc-shaped groove and the annular rubber inner tube ensures directional deformation during inner tube expansion, enhancing its adaptability to different pipe diameters. Attached Figure Description

[0014] Figure 1 A schematic diagram of a preferred embodiment of the alloy seamless steel pipe butt welding device provided by this utility model;

[0015] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the connecting pipe.

[0016] The following are the labels in the diagram: 1. Connecting pipe; 1a. Arc-shaped groove; 1b. Threaded hole; 1c. Annular groove; 11. Abutting washer; 2. Annular rubber inner tube; 3. One-way air intake valve; 4. Fastening screw; 5. Rubber gasket. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and 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.

[0018] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0019] Please see Figures 1 to 2 This utility model provides an alloy seamless steel pipe docking device, which includes a central connecting pipe 1 and an annular rubber inner tube 2.

[0020] In the embodiments of this utility model, please refer to Figure 1 and Figure 2The central connecting pipe 1 has a fixedly fitted abutment ring 11 in the middle, and multiple equally spaced annular rubber inner tubes 2 are installed on the inner walls of the central connecting pipe 1 on both sides of the abutment ring 11. A one-way air inlet valve 3 is installed on each annular rubber inner tube 2. The annular rubber inner tube 2 is inflated by the one-way air inlet valve 3, causing it to expand and abut against the outer wall of the alloy seamless steel pipe inserted into the central connecting pipe 1. Specifically:

[0021] The inner wall of the central connecting pipe 1 has multiple annularly distributed arc-shaped grooves 1a. The outer surface of the annular rubber inner tube 2 is fixedly fitted into the arc-shaped grooves 1a. Multiple annularly distributed one-way air intake valves 3 are fixedly installed on each annular rubber inner tube 2. The one-way air intake valves 3 penetrate the wall of the central connecting pipe 1 and extend out of the central connecting pipe 1.

[0022] It should be noted that when connecting two seamless alloy steel pipes, the two seamless alloy steel pipes are inserted into the connecting pipe 1 from both ends until they abut against the mating gasket 11. Then, an air pump (or air compressor) is used to inflate each annular rubber inner tube 2 through the one-way air inlet valve 3, causing the annular rubber inner tube 2 to expand. The expanded annular rubber inner tube 2 can quickly fill the gap between the inner wall of the connecting pipe 1 and the outer wall of the seamless alloy steel pipe, thus achieving the pressing and sealing of the gap of the seamless alloy steel pipe. Furthermore, the expanded annular rubber inner tube 2 effectively increases the damping between the seamless alloy steel pipe and the connecting pipe 1, making it difficult for the seamless alloy steel pipe to slip out of the connecting pipe 1.

[0023] It should also be noted that: because the annular rubber inner tube 2 is an elastic structure, the structural form reduces the risk of connection failure or sealing failure between the two due to vibration of the alloy seamless steel pipe.

[0024] It is worth noting that when the alloy seamless steel pipe is removed from the central connecting pipe 1, a steel needle is inserted into the one-way air intake valve 3 to release the air from the annular rubber inner tube 2, after which the alloy seamless steel pipe can be pulled out.

[0025] Furthermore, the outer wall of the central connecting pipe 1 is provided with several annular grooves 1c corresponding to the arc-shaped annular grooves 1a. The one-way air intake valve 3 is located in the annular grooves 1c. The annular grooves 1c allow the valve body portion of the one-way air intake valve 3 extending out of the central connecting pipe 1 to be located within the annular grooves 1c, effectively avoiding wear between the valve body portion extending out of the central connecting pipe 1 and the ground, thus protecting the port of the one-way air intake valve 3.

[0026] Furthermore, rubber gaskets 5 are fixedly fitted on both sides of the abutment ring 11, thereby reducing the wear between the insertion end of the alloy seamless steel pipe and the abutment ring 11 and the internal stress of the abutment.

[0027] In order to improve the service life of the annular rubber inner tube 2, the inner tube is made of special rubber that is resistant to high temperature and chemical corrosion (such as fluororubber or silicone rubber), and a suitable protective coating is added as needed (no restrictions are imposed here).

[0028] The groove on the central connecting pipe 1 is integrally formed by casting, and during the processing, a hole for inserting the one-way air intake valve 3 is formed by drilling (that is, the one-way air intake valve 3 extends through the central connecting pipe 1 to the hole in the annular groove 1c). After the one-way air intake valve 3 passes through the hole, it can be fixed by welding.

[0029] In the embodiments of this utility model, please refer to Figure 1 and Figure 2 The central connecting pipe 1 has multiple annular and radially distributed threaded holes 1b on its pipe wall near both ends, and each threaded hole 1b is fitted with a threaded fastening screw 4.

[0030] It should be noted that after the connecting pipe 1 connects to the alloy seamless steel pipe through the annular rubber inner tube 2, rotating the fastening screw 4 further strengthens the fixation of the alloy seamless steel pipe.

[0031] In this application, the annular rubber inner tube 2 is inflated and expands to quickly fill the gap between the connecting pipe 1 and the alloy seamless steel pipe, achieving uniform compression and sealing. At the same time, combined with the secondary reinforcement of the fastening screw 4, the connection stability is significantly improved. The elastic properties of the annular rubber inner tube 2 can effectively absorb vibration energy and reduce the risk of connection failure caused by vibration. Furthermore, the interlocking design of the arc-shaped annular groove 1a and the annular rubber inner tube 2 ensures directional deformation during inner tube expansion, improving the tolerance to different pipe diameters. The one-way air inlet valve 3 is integrated into the annular groove 1c of the connecting pipe 1 to avoid external wear. The inflation operation is simple and does not require complicated tools.

[0032] The working principle of the alloy seamless steel pipe butt welding device provided by this utility model is as follows:

[0033] When connecting two seamless alloy steel pipes, the two seamless alloy steel pipes are inserted into the connecting pipe 1 from both ends until they abut against the mating gasket 11. Then, an air pump (or air compressor) is used to inflate each annular rubber inner tube 2 through the one-way air inlet valve 3, causing the annular rubber inner tube 2 to expand. The expanded annular rubber inner tube 2 quickly fills the gap between the inner wall of the connecting pipe 1 and the outer wall of the seamless alloy steel pipe, thus achieving compression and sealing of the seamless alloy steel pipe. Furthermore, the expanded annular rubber inner tube 2 effectively increases the damping between the seamless alloy steel pipe and the connecting pipe 1, making it difficult for the seamless alloy steel pipe to slip out of the connecting pipe 1. Since the annular rubber inner tube 2 is an elastic structure, it reduces the risk of connection failure or sealing failure caused by vibration of the seamless alloy steel pipe. After the connecting pipe 1 connects to the seamless alloy steel pipe through the annular rubber inner tube 2, rotating the fastening screw 4 further strengthens the fixation of the seamless alloy steel pipe.

[0034] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An alloy seamless steel pipe butt joining apparatus characterized by comprising: Includes a central tube (1), wherein a mating ring (11) is fixedly fitted in the middle of the central tube (1), and multiple equidistant annular rubber inner tubes (2) are installed on the inner walls of the central tube (1) on both sides of the mating ring (11). The annular rubber inner tube (2) is equipped with a one-way air inlet valve (3). The annular rubber inner tube (2) is inflated by the one-way air inlet valve (3) so that the annular rubber inner tube (2) expands and abuts against the outer wall of the alloy seamless steel pipe inserted into the central connecting pipe (1).

2. The butt apparatus for seamless steel pipes of the alloy according to claim 1, characterized by The inner wall of the central connecting pipe (1) is provided with multiple annularly distributed arc-shaped grooves (1a), and the outer surface of the annular rubber inner tube (2) is fixedly fitted into the arc-shaped grooves (1a).

3. The butt apparatus for seamless steel pipes of alloy according to claim 2, characterized by Each of the annular rubber inner tubes (2) is fixedly equipped with multiple annularly distributed one-way air intake valves (3), and the one-way air intake valves (3) penetrate the wall of the central connecting pipe (1) and extend out of the central connecting pipe (1).

4. The butt apparatus for seamless steel pipes of alloy according to claim 3, characterized by The outer wall of the central connecting pipe (1) is provided with several annular grooves (1c) that correspond to the arc-shaped annular groove (1a), and the one-way air intake valve (3) is located in the annular groove (1c).

5. The butt apparatus for seamless steel pipes of alloy according to claim 1, characterized by The central connecting pipe (1) has multiple annular and radially distributed threaded holes (1b) on the pipe wall near the two ends of the pipe. Each threaded hole (1b) is fitted with a threaded fastening screw (4).

6. The butt apparatus for seamless steel pipe of alloy according to claim 1, characterized by Both sides of the abutment ring (11) are fixedly fitted with rubber gaskets (5).

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