Ultrasonic welding construction method for large-diameter PE natural gas pipelines

A natural gas pipeline, ultrasonic welding technology, applied in the direction of pipeline connection layout, pipe/pipe joints/pipe fittings, tubular objects, etc., can solve the problems of complicated operation process and welding technology, inoperable operation mode, low operation efficiency, etc. The effect of prolonging the construction operation season, improving operation efficiency and increasing benefits

Active Publication Date: 2021-06-29
BEIJING GAS DESIGN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] 1. It needs special thermal welding equipment or electromelting equipment to operate;
[0016] 2. The operation process and welding technology are complex, requiring high technical proficiency of the operators, and special training is required to work on the job. If there is a slight error, the joint must be sawed off, the joint must be re-milled and the welding operation must be performed again;
[0017] 3. The operation site needs to be connected to a stable municipal power supply;
[0018] 4. The operation speed is slow, it takes about 25-50 minutes to weld a joint, and the operation efficiency is low;
[0019] 5. The operation method cannot be operated in winter and windy weather

Method used

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  • Ultrasonic welding construction method for large-diameter PE natural gas pipelines
  • Ultrasonic welding construction method for large-diameter PE natural gas pipelines
  • Ultrasonic welding construction method for large-diameter PE natural gas pipelines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The large diameter referred to in the present invention refers to the PE natural gas pipeline above DN100, and the ultrasonic welding construction method of the large diameter PE natural gas pipeline of the present invention comprises the following steps:

[0053] S10, perform section cleaning and chamfering operations on the two sections of PE natural gas pipelines 1 that need to be connected;

[0054] S20, immerse the two sections of PE natural gas pipeline 1 in hot water at 95-100°C for 3-5 minutes, so that the two sections of PE natural gas pipeline 1 appear softened, but the PE natural gas pipeline 1 cannot be obviously deformed;

[0055] S30, use a clean water-absorbing material to wipe off the water droplets on the surface of the two-section PE natural gas pipeline 1;

[0056] S40, if the thickness of PE natural gas pipeline 1 is not greater than 6.3mm, such as image 3 As shown, the sealing support 8 is aligned with the inner surfaces of the two PE natural gas ...

Embodiment 2

[0067] The difference between this embodiment and Embodiment 1 lies in step S40 and step S50, such as Figure 8 As shown, when the thickness of the PE natural gas pipeline 1 is greater than 6.3 mm, no preprocessing of the PE natural gas pipeline 1 is required in this embodiment.

[0068] Specific steps include:

[0069] S10, perform section cleaning and chamfering operations on the two sections of PE natural gas pipelines 1 that need to be connected;

[0070] S20, immerse the two sections of PE natural gas pipeline 1 in hot water at 95-100°C for 3-5 minutes, so that the two sections of PE natural gas pipeline 1 appear softened, but the PE natural gas pipeline 1 cannot be obviously deformed;

[0071] S30, use a clean water-absorbing material to wipe off the water droplets on the surface of the two-section PE natural gas pipeline 1;

[0072] S40, align the sealing support 8 with the inner surfaces of the two PE natural gas pipelines 1, and quickly push the PE natural gas pipel...

Embodiment 3

[0078] The difference between this embodiment and Embodiment 1 lies in step S50, such as Figure 10 As shown, when the thickness of the PE natural gas pipeline 1 is greater than 6.3mm, the PE natural gas pipeline 1 is preprocessed, and then ultrasonic welding bands 7 are added to the two sections of the pipe wall with different thicknesses.

[0079] Specific steps include:

[0080] S10, perform section cleaning and chamfering operations on the two sections of PE natural gas pipelines 1 that need to be connected;

[0081] S20, immerse the two sections of PE natural gas pipeline 1 in hot water at 95-100°C for 3-5 minutes, so that the two sections of PE natural gas pipeline 1 appear softened, but the PE natural gas pipeline 1 cannot be obviously deformed;

[0082] S30, use a clean water-absorbing material to wipe off the water droplets on the surface of the two-section PE natural gas pipeline 1;

[0083] S40, if the thickness of the PE natural gas pipeline 1 is not greater than...

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Abstract

The invention discloses an ultrasonic welding construction method for large-diameter PE natural gas pipelines, relates to a pipeline connection method, and aims to provide the ultrasonic welding construction method which is used for the large-diameter PE natural gas pipelines and is high in welding efficiency and easy to operate. The ultrasonic welding construction method for the large-diameter PE natural gas pipelines comprises the following steps that S10, section cleaning and chamfering operation is conducted on two sections of PE natural gas pipelines required to be connected; S20, the two sections of PE natural gas pipelines are soaked in hot water, so that the two sections of PE natural gas pipelines are softened; S30, water drops on the surfaces of the two sections of PE natural gas pipelines are wiped away; S40, a sealing and supporting piece is aligned with the inner surfaces of the two sections of PE natural gas pipelines, and the PE natural gas pipelines are rapidly pushed to the preset positions; and S50, a plurality of annular ultrasonic welding belts are additionally arranged between the PE natural gas pipelines and the sealing and supporting piece.

Description

technical field [0001] The invention relates to the technical field of pipeline connection, in particular to a large-diameter PE natural gas pipeline ultrasonic welding construction method. Background technique [0002] PE pipe has many excellent characteristics, such as low temperature resistance, good toughness, high strength, etc., and has been well used in the natural gas industry. PE natural gas pipelines show their talents in some special-purpose occasions, because in these fields, PE natural gas pipelines have great advantages compared with traditional metal material pipelines, such as low cost of pipelines, pipelines can easily achieve large slopes, and pipelines can achieve It can turn at any angle, and it can also ensure the safe use of pipelines. Such as steel pipes, cast iron pipes, and natural gas pipelines, the biggest problem is the common occurrence of pipe corrosion and joint leakage during the service period. PE natural gas pipelines have obvious advantag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L47/02B29C65/08B29L23/00
CPCF16L47/02B29C65/08B29L2023/005
Inventor 郝蕴华朱倩赵青松徐明星翟羽李清
Owner BEIJING GAS DESIGN
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