Pipeline inner wall structure and pipeline inner wall repair-free welding connection process thereof

Abstract

This invention discloses a pipe inner wall structure and a repair-free welding connection process for the pipe inner wall, relating to the field of pipe connection technology. It solves the problem that during pipe welding, the welding torch can damage or even destroy the inner wall structure, requiring post-weld repair, which is cumbersome and affects pipe connection efficiency. The pipe inner wall structure includes two connecting pipes, each comprising a pipe body with a sealing groove on its inner side. A repair-free connection mechanism is installed between the two connecting pipes. The repair-free connection mechanism includes two pipe end fixing rings, each fixed to the end of one of the two pipe bodies, with an intermediate connecting ring between them. This invention does not damage the internal pipe wall structure during welding, and eliminates the need for post-weld repair of the inner wall of the pipe body.

Description

Technical Field

[0001] This invention relates to the field of pipeline connection technology, specifically to a pipeline inner wall structure and a repair-free welding connection process for the pipeline inner wall. Background Technology

[0002] A pipeline is a device made up of pipes, pipe fittings, valves, etc., used to transport gases, liquids, or fluids containing solid particles. Typically, after the fluid is pressurized by blowers, compressors, pumps, boilers, etc., it flows from the high-pressure point to the low-pressure point in the pipeline. It can also be transported using the fluid's own pressure or gravity. Pipelines have a wide range of applications, mainly used for water supply, drainage, heating, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation, hydraulic engineering, marine engineering, and various industrial installations.

[0003] Pipelines generally consist of the pipe body and the inner wall structure. The inner wall structure is composed of various coatings, such as waterproof coatings, anti-corrosion coatings, and anti-aging coatings, which are used to ensure that the liquid transported inside the pipe will not corrode the pipe and to ensure the service life of the pipe.

[0004] When pipes are welded and fixed, the welding torch can damage or even destroy the inner wall structure of the pipe. This requires repair of the inner wall structure after welding, which is a complicated process and affects the efficiency of pipe connection. Therefore, it does not meet the current needs. To address this, we propose a new pipe inner wall structure and a repair-free welding connection process for the inner wall of the pipe. Summary of the Invention

[0005] The purpose of this invention is to provide a pipe inner wall structure and a repair-free welding connection process for the pipe inner wall, so as to solve the problems mentioned in the background art, such as the welding torch causing damage or even destruction to the pipe inner wall structure during pipe welding and fixing, requiring repair of the pipe inner wall structure after welding, which is a troublesome process and affects the efficiency of pipe connection.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a pipe inner wall structure, comprising two connecting pipes, each connecting pipe comprising a pipe body, the inner side of which is provided with a sealing snap groove, and a repair-free connection mechanism installed between the two connecting pipes;

[0007] The repair-free connection mechanism includes two pipe end fixing rings, which are respectively fixed to the ends of two pipe bodies. An intermediate connecting ring is installed between the two pipe end fixing rings. A welded connecting ring is connected between the intermediate connecting ring and the two pipe end fixing rings. The intermediate connecting ring and the welded connecting ring have T-shaped cross sections, and the two welded connecting rings are located outside the intermediate connecting ring and clamp the intermediate connecting ring.

[0008] Preferably, the end of the pipe end fixing ring near the welding connecting ring is U-shaped and flipped outward, and the other end of the pipe end fixing ring is bent outward and engaged in the sealing engagement groove.

[0009] Preferably, a sealing ring is engaged with the inner side of the end of the pipe end fixing ring that is engaged in the sealing engagement groove, and the outer surface of the sealing ring is in contact with the inner wall of the pipe end fixing ring and the inner wall of the pipe body.

[0010] Preferably, the sealing ring includes a drainage ring body and a sealing plug ring, the sealing plug ring is fixed on the outer surface of the drainage ring body and the sealing plug ring is snapped into the sealing snap groove, and the sealing plug ring is in contact with the inner surface of the pipe end fixing ring.

[0011] Preferably, multiple concentric reinforcing rings are fixed to the surfaces of the two pipe end fixing rings facing the welding connecting ring and the two side surfaces of the middle connecting ring, and the inner ring of the reinforcing ring is inclined at a 30-degree angle towards the welding connecting ring.

[0012] Preferably, the reinforcing ring and the pipe end fixing ring, as well as the reinforcing ring and the intermediate connecting ring, are all integrally cast.

[0013] Preferably, the inner wall of the pipe is coated with a corrosion-resistant coating, and the inner side of the corrosion-resistant coating is coated with a waterproof coating.

[0014] A repair-free welding connection process for the inner wall structure of a pipe includes the following steps:

[0015] S1: First, connect and fix the pipe end fixing ring to the end of the pipe body. After the pipe end fixing ring is fixed to the pipe body, install the sealing ring consisting of the drainage ring body and the sealing plug ring on the inner side of the end of the pipe end fixing ring located inside the pipe body, and ensure that the sealing plug ring is engaged in the sealing snap groove and fits against the inner wall of the pipe end fixing ring.

[0016] S2: Then, place the two welded connecting rings on both sides of the middle connecting ring and push the two welded connecting rings against each other so that the ends of the welded connecting rings are completely in contact with the sides of the middle connecting ring, and the two welded connecting rings clamp the middle connecting ring.

[0017] S3: Then bring the two pipe bodies with the pipe end fixing rings installed close to each other, and place the welding connecting ring and the intermediate connecting ring between the two pipe bodies, so that the two pipe end fixing rings fixed at the ends of the two pipe bodies fit into the welded connecting ring ends on the side of the intermediate connecting ring;

[0018] S4: Next, the staff used a welding torch to weld the gaps between the welding connecting ring and the pipe end fixing ring, and between the welding connecting ring and the reinforcing ring. This completely filled the gaps between the welding connecting ring and the pipe end fixing ring, and between the welding connecting ring and the reinforcing ring. The welding marks from the welding torch completely covered the surface of the pipe end fixing ring and the reinforcing rings on both sides of the middle connecting ring, thus achieving the connection and fixation of the two pipe bodies. The welding process did not damage the coating on the inner wall of the pipe.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. This invention uses two pipe end fixing rings, two welding connecting rings and an intermediate connecting ring to connect and fix the ends of two pipe bodies. Welding is performed from the outside between the welding connecting ring and the pipe end fixing ring, and between the welding connecting ring and the reinforcing ring. Welding fixation will not damage the internal pipe wall structure. After the two pipe bodies are connected, there is no need to repair the internal pipe wall, thus improving work efficiency.

[0021] 2. In this invention, multiple concentric reinforcing rings are fixed on the surfaces of the two pipe end fixing rings facing the welding connecting ring and on both sides of the middle connecting ring. The inner ring of the reinforcing ring is inclined at a 30-degree angle towards the welding connecting ring. After the pipe end fixing ring and the welding connecting ring, and the welding connecting ring and the middle connecting ring are welded and reinforced using a welding torch, the reinforcing rings can increase the connectivity between the pipe end fixing ring, the middle connecting ring, the welding connecting ring and the welding ring, and strengthen the connection strength and stability between the pipe end fixing ring and the welding connecting ring, and between the middle connecting ring and the welding connecting ring. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a cross-sectional view of the connecting pipe of the present invention;

[0024] Figure 3 This is a schematic diagram of the connecting pipe of the present invention;

[0025] Figure 4 This is a schematic diagram of the repair-free connection mechanism of the present invention;

[0026] Figure 5 This is a schematic diagram of the sealing ring of the present invention.

[0027] In the diagram: 1. Connecting pipe; 101. Pipe body; 102. Waterproof coating; 103. Corrosion-resistant coating; 104. Sealing snap groove; 2. Repair-free connection mechanism; 201. Pipe end fixing ring; 202. Intermediate connecting ring; 203. Sealing ring; 2031. Drainage ring body; 2032. Sealing plug ring; 204. Welded connecting ring; 205. Reinforcing ring. Detailed Implementation

[0028] 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.

[0029] like Figure 1 and Figure 3 As shown, a pipe inner wall structure includes two connecting pipes 1. Each connecting pipe 1 includes a pipe body 101. A sealing groove 104 is provided on the inner side of the pipe body 101. A repair-free connection mechanism 2 is installed between the two connecting pipes 1. A corrosion-resistant coating 103 is attached to the inner wall of the pipe body 101. A waterproof coating 102 is attached to the inner side of the corrosion-resistant coating 103. The waterproof coating 102 can reduce the corrosion rate of the inner wall of the pipe body 101 and reduce the scouring and corrosion of the corrosion-resistant coating 103 by the water flow inside the pipe body 101.

[0030] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the repair-free connection mechanism 2 includes two pipe end fixing rings 201, which are respectively fixed to the ends of two pipe bodies 101. An intermediate connecting ring 202 is installed between the two pipe end fixing rings 201. Welded connecting rings 204 are connected between the intermediate connecting ring 202 and the two pipe end fixing rings 201. The cross-section of the intermediate connecting ring 202 and the welded connecting ring 204 is T-shaped, and the two welded connecting rings 204 are located outside the intermediate connecting ring 202 and clamp the intermediate connecting ring 202. The ends of the two pipe bodies 101 are connected and fixed by the two pipe end fixing rings 201, the two welded connecting rings 204 and the intermediate connecting ring 202. Welding is performed from the outside between the welded connecting ring 204 and the pipe end fixing ring 201, and between the welded connecting ring 204 and the reinforcing ring 205. The welding fixation will not damage the internal pipe wall structure of the pipe body 101. After the two pipe bodies 101 are connected, there is no need to repair the inner wall of the pipe body 101.

[0031] The end of the pipe end fixing ring 201 near the welding connecting ring 204 is turned outward in a U-shape, and the other end of the pipe end fixing ring 201 is bent outward and locked in the sealing locking groove 104. The outward bending of the end of the pipe end fixing ring 201 and locking in the sealing locking groove 104 can increase the connection strength between the pipe end fixing ring 201 and the pipe body 101, ensuring that the pipe end fixing ring 201 and the pipe body 101 will not easily separate or fall off.

[0032] A sealing ring 203 is attached to the inner side of the end of the pipe end fixing ring 201 that is snapped into the sealing snap groove 104. The outer surface of the sealing ring 203 is in contact with the inner wall of the pipe end fixing ring 201 and the inner wall of the pipe body 101. The sealing ring 203 includes a drainage ring body 2031 and a sealing insertion ring 2032. The sealing insertion ring 2032 is fixed to the outer surface of the drainage ring body 2031 and is snapped into the sealing snap groove 104. The sealing insertion ring 2032 is in contact with the inner surface of the pipe end fixing ring 201. The sealing ring 203, composed of the drainage ring body 2031 and the sealing insertion ring 2032, fills the gap between the pipe end fixing ring 201 and the pipe body 101, ensuring the sealing performance after the pipe end fixing ring 201 and the pipe body 101 are connected.

[0033] Multiple concentric reinforcing rings 205 are fixed to the surfaces of the two pipe end fixing rings 201 facing the welding connecting ring 204 and the two sides of the intermediate connecting ring 202. The inner ring of the reinforcing ring 205 is inclined at a 30-degree angle towards the welding connecting ring 204. The reinforcing ring 205 and the pipe end fixing ring 201, and the reinforcing ring 205 and the intermediate connecting ring 202 are all integrally cast. The reinforcing ring 205 can increase the connection between the pipe end fixing ring 201, the intermediate connecting ring 202, the welding connecting ring 204 and the welding ring, and strengthen the connection strength and stability between the pipe end fixing ring 201 and the welding connecting ring 204, and between the intermediate connecting ring 202 and the welding connecting ring 204.

[0034] Working principle: In use, first, fix the pipe end fixing ring 201 to the end of the pipe body 101, ensuring that the end of the pipe end fixing ring 201 inserted into the pipe body 101 is engaged in the sealing groove 104. Then, install the sealing ring 203 in the middle of the end of the pipe end fixing ring 201 located inside the pipe body 101, filling the gap between the pipe end fixing ring 201 and the sealing groove 104. Then, fit the two welded connecting rings 204 on both sides of the middle connecting ring 202 and press them tightly. Finally, bring the two pipe bodies 101 closer together so that the two pipe bodies 101 are close together. The pipe end fixing ring 201 at one end clamps the intermediate connecting ring 202 and the welding connecting ring 204. Finally, a welding torch is used to weld and fill the gaps between the welding connecting ring 204 and the pipe end fixing ring 201, and between the welding connecting ring 204 and the reinforcing ring 205. During the welding and fixing process, the welding marks of the welding torch will not enter the interior of the pipe body 101, and will not damage the inner wall of the pipe body 101 or cause damage to the inner wall structure of the pipe body 101. After the two pipe bodies 101 are connected, there is no need to repair the inner wall of the pipe body 101, thus improving work efficiency.

[0035] A repair-free welding connection process for the inner wall structure of a pipe includes the following steps:

[0036] S1: First, connect and fix the pipe end fixing ring 201 to the end of the pipe body 101. After the pipe end fixing ring 201 and the pipe body 101 are fixed, install the sealing ring 203 composed of the drainage ring body 2031 and the sealing plug ring 2032 on the inner side of the end of the pipe end fixing ring 201 located inside the pipe body 101, and ensure that the sealing plug ring 2032 is engaged in the sealing snap groove 104 and fits against the inner wall of the pipe end fixing ring 201.

[0037] S2: Then, the two welded connecting rings 204 are placed on both sides of the middle connecting ring 202, and the two welded connecting rings 204 are pushed against each other so that the ends of the welded connecting rings 204 are completely in contact with the sides of the middle connecting ring 202, and the two welded connecting rings 204 clamp the middle connecting ring 202.

[0038] S3: Then, bring the two pipe bodies 101 with the pipe end fixing ring 201 installed close to each other, and place the welding connecting ring 204 and the intermediate connecting ring 202 between the two pipe bodies 101, so that the two pipe end fixing rings 201 fixed at the ends of the two pipe bodies 101 are in contact with the ends of the welding connecting ring 204 on the side of the intermediate connecting ring 202.

[0039] S4: Next, the staff used a welding torch to weld the gaps between the welding connecting ring 204 and the pipe end fixing ring 201, and between the welding connecting ring 204 and the reinforcing ring 205. This completely filled the gaps between the welding connecting ring 204 and the pipe end fixing ring 201, and between the welding connecting ring 204 and the reinforcing ring 205. The welding marks from the welding torch completely covered the surface of the pipe end fixing ring 201 and the reinforcing rings 205 on both sides of the middle connecting ring 202, thus achieving the connection and fixation of the two pipe bodies 101. The welding process did not damage the coating on the inner wall of the pipe body 101.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A pipe inner wall structure, comprising two connecting pipes (1), characterized in that: The connecting pipe (1) includes a pipe body (101), and a sealing snap groove (104) is provided on the inner side of the pipe body (101). A repair-free connection mechanism (2) is installed between the two connecting pipes (1). The repair-free connection mechanism (2) includes two pipe end fixing rings (201), which are respectively fixed to the ends of two pipe bodies (101). An intermediate connecting ring (202) is installed between the two pipe end fixing rings (201). A welded connecting ring (204) is connected between the intermediate connecting ring (202) and the two pipe end fixing rings (201). The intermediate connecting ring (202) and the welded connecting ring (204) have T-shaped cross sections. The two welded connecting rings (204) are located outside the intermediate connecting ring (202) and clamp the intermediate connecting ring (202). The end of the pipe end fixing ring (201) near the welding connecting ring (204) is turned outward in a U-shape, and the other end of the pipe end fixing ring (201) is bent outward and snapped into the sealing snap groove (104); The pipe end fixing ring (201) is engaged with a sealing ring (203) on the inner side of the end of the sealing locking groove (104). The outer surface of the sealing ring (203) is in contact with the inner wall of the pipe end fixing ring (201) and the inner wall of the pipe body (101). The sealing ring (203) includes a drainage ring body (2031) and a sealing plug ring (2032). The sealing plug ring (2032) is fixed on the outer surface of the drainage ring body (2031) and the sealing plug ring (2032) is snapped into the sealing snap groove (104). The sealing plug ring (2032) is in contact with the inner surface of the pipe end fixing ring (201). Multiple concentric reinforcing rings (205) are fixed on the surfaces of the two pipe end fixing rings (201) facing the welding connecting ring (204) and on both sides of the intermediate connecting ring (202). The inner ring of the reinforcing ring (205) is inclined at a 30-degree angle toward the welding connecting ring (204).

2. The pipe inner wall structure according to claim 1, characterized in that: The reinforcing ring (205) and the pipe end fixing ring (201), as well as the reinforcing ring (205) and the intermediate connecting ring (202), are all integrally cast.

3. The pipe inner wall structure according to claim 2, characterized in that: The inner wall of the tube (101) is coated with a corrosion-resistant coating (103), and the inner side of the corrosion-resistant coating (103) is coated with a waterproof coating (102).

4. The pipe inner wall repair-free welding connection process according to claim 3, characterized in that: Includes the following steps: S1: First, connect and fix the pipe end fixing ring (201) to the end of the pipe body (101). After the pipe end fixing ring (201) and the pipe body (101) are fixed, install the sealing ring (203) composed of the drainage ring body (2031) and the sealing plug ring (2032) on the inner side of the end of the pipe end fixing ring (201) located inside the pipe body (101), and ensure that the sealing plug ring (2032) is engaged in the sealing snap groove (104) and fits against the inner wall of the pipe end fixing ring (201). S2: Then, the two welded connecting rings (204) are placed on both sides of the middle connecting ring (202), and the two welded connecting rings (204) are pushed against each other so that the ends of the welded connecting rings (204) are completely in contact with the sides of the middle connecting ring (202), and the two welded connecting rings (204) clamp the middle connecting ring (202). S3: Then bring the two pipe bodies (101) with the pipe end fixing ring (201) installed close to each other, and place the welding connecting ring (204) and the intermediate connecting ring (202) between the two pipe bodies (101) so that the two pipe end fixing rings (201) fixed at the ends of the two pipe bodies (101) fit against the ends of the welding connecting ring (204) on the side of the intermediate connecting ring (202); S4: Next, the staff used a welding torch to weld the gaps between the welding connecting ring (204) and the pipe end fixing ring (201), and between the welding connecting ring (204) and the reinforcing ring (205), so that the gaps between the welding connecting ring (204) and the pipe end fixing ring (201), and between the welding connecting ring (204) and the reinforcing ring (205) are completely filled, and the welding marks of the welding torch completely cover the surface of the pipe end fixing ring (201) and the reinforcing rings (205) on both sides of the middle connecting ring (202), so as to achieve the connection and fixation of the two pipe bodies (101), and the coating on the inner wall of the pipe body (101) will not be damaged during the welding process.

Images