Seamless S-shaped elbow for installing urban gas pipeline and processing technology of seamless S-shaped elbow

Abstract

The invention discloses a seamless S-shaped elbow for mounting a gas pipeline in cities and towns and a processing technology thereof, the seamless S-shaped elbow comprises a straight section and bent sections positioned at two ends of the straight section, and the bent sections positioned at the two ends of the straight section bend and extend in opposite directions; wherein the bent sections located at the two ends of the straight section are formed by the same seamless steel pipe in a hot-bending mode so that the size of the straight section can be matched with the size of the winding wall. Customized design and machining can be carried out according to actual requirements of different users, a plurality of elbows and direct pipelines do not need to be adopted, the space needed for gas pipeline installation is saved, the safety distance requirement is met, meanwhile, the number of welded junctions is reduced, the risk of high-altitude operation is reduced, and a certain attractive effect on an outer wall is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of urban gas pipeline installation, and in particular relates to a seamless S-elbow for urban gas pipeline installation and a processing technology thereof. Background Art

[0002] At present, there are many types of limited space for urban gas pipeline installation, which is mainly reflected in the installation process of community courtyards and gas inlet pipes. For example, when the courtyard soil cover is shallow, the gas pipeline will be in conflict with the basement beam during the laying process, and it is necessary to add elbows to wrap around the wall, and direct pipes need to be added between the elbows, resulting in insufficient buried depth of the pipeline. In the installation process of the community inlet pipe, it is necessary to add elbows to wrap around the outer wall, and direct pipes need to be added between the elbows, resulting in a large gap between the pipeline and the outer wall shape in the outer wall shape section, which not only affects the appearance, but also requires multiple welding operations, and there is a risk of high-altitude operations. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a seamless S-elbow for urban gas pipeline installation and a processing technology thereof, which can be customized in design and processing according to the actual needs of different users. There is no need to use multiple elbows and direct pipelines, which saves the space required for gas pipeline installation, meets the safety spacing requirements, reduces the number of welds, reduces the risk of high-altitude operations, and also has a certain aesthetic effect on the exterior wall.

[0004] The object of the present invention is achieved through the following technical solutions:

[0005] A seamless S elbow for installing a town gas pipeline, comprising a straight section and curved sections at both ends of the straight section, wherein the curved sections at both ends of the straight section bend and extend in opposite directions;

[0006] The curved sections at both ends of the straight section are formed by hot-bending the same seamless steel pipe so that the size of the straight section matches the size of the winding wall.

[0007] The present invention also provides a processing technology for a seamless S elbow for installing a town gas pipeline, comprising the following steps:

[0008] Step S1, cutting the base material to obtain a seamless steel pipe;

[0009] Step S2, hot-simmering one end of the seamless steel pipe to form a curved section;

[0010] Step S3, reserving a straight section according to a preset length;

[0011] Step S4, hot-simmering the other end of the seamless steel pipe to form a seamless S-elbow.

[0012] In one embodiment, in step S2 and step S4, hot-simmering the seamless steel pipe comprises:

[0013] Filling sand and gravel into the seamless steel pipe;

[0014] Uniformly heat the seamless steel pipe to 800-900℃;

[0015] Place the seamless steel pipe on the jig for bending;

[0016] After cooling and shaping, pour out the sand and gravel in the seamless steel pipe;

[0017] Clean the seamless steel pipe and dry it with hot air at 40-50℃.

[0018] In one embodiment, placing the seamless steel pipe on a mold for bending further comprises:

[0019] Bend the seamless steel pipe to a preset angle of 3 to 5°;

[0020] When it rebounds to 45°, it is cooled and shaped by water flow.

[0021] In one embodiment, filling sand and gravel into the seamless steel pipe also includes:

[0022] Use sand and gravel to fill the entire seamless steel pipe. During the filling process, knock on the seamless steel pipe while filling the sand and gravel to fill the sand and gravel inside.

[0023] In one embodiment, it further comprises:

[0024] A water source is set at the end of the seamless steel pipe to cool and shape it when it rebounds to 45°.

[0025] The beneficial effects of the present invention are:

[0026] To solve the problem of limited installation space and numerous styles of urban gas pipelines, customized design and processing are carried out according to the actual needs of different users. A straight section of appropriate length is reserved in the S-elbow, and there is no need to use multiple conventional S-elbows and direct pipe sections. This saves the space required for gas pipeline installation, meets the safety spacing requirements, reduces the number of welds, reduces the risk of high-altitude operations, and also has a certain aesthetic effect on the exterior wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0028] Figure 1 A schematic structural diagram of a seamless S-elbow of the present invention is shown;

[0029] Figure 2The schematic diagram of the structure of the currently existing S-bend is shown;

[0030] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.

[0031] Reference numerals:

[0032] 1-straight section, 2-curved section. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings.

[0034] Due to the limited installation space and many styles of urban gas pipelines, in the layout of gas pipelines, it is often necessary to add elbows to go around the external wall, and direct pipelines need to be added between the elbows, resulting in a large gap between the pipeline and the external wall shape in the wall-wrapped external wall section, which not only affects the appearance, but also requires multiple welding operations, which poses the risk of high-altitude operations. Figure 2 The S elbow shown in the figure has different installation restrictions for different users, and each user has different requirements for the outer wall size. In order to meet the safety spacing requirements, multiple S elbows and direct pipes may still be required for combined connection;

[0035] The present invention provides a seamless S elbow for installing a town gas pipeline, such as Figure 1 As shown,

[0036] It comprises a straight section 1 and curved sections 2 located at two ends of the straight section 1, wherein the curved sections 2 located at two ends of the straight section 1 are curved and extend in opposite directions;

[0037] The curved sections 2 at both ends of the straight section 1 are formed by hot-bending the same seamless steel pipe, so that the size of the straight section 1 matches the size of the winding wall.

[0038] It should be noted that the seamless S-elbow is formed by hot-bending the same seamless steel pipe, and the curved sections 2 at both ends of the seamless S-elbow are formed by hot-bending in sections. According to the actual requirements of the outer wall size, the size of the straight section 1 in the middle is reserved. The gas pipeline can be wrapped around the outer wall using a seamless S-elbow, which meets the safety spacing requirements while reducing the number of welds, reduces the risk of high-altitude operations, and also has a certain aesthetic effect on the outer wall.

[0039] The present invention also provides a processing technology for a seamless S elbow for installing a town gas pipeline, comprising the following steps:

[0040] Step S1, cutting the base material to obtain a seamless steel pipe;

[0041] Step S2, hot-simmering one end of the seamless steel pipe to form a curved section 2;

[0042] Step S3, reserving a straight section 1 according to a preset length;

[0043] Step S4, hot-simmering the other end of the seamless steel pipe to form a seamless S-elbow;

[0044] Specifically, in step S2 and step S4, hot-simmering the seamless steel pipe includes:

[0045] Fill the seamless steel pipe with sand and gravel, and use the sand and gravel to fill the entire seamless steel pipe. During the filling process, the seamless steel pipe is knocked while filling the sand and gravel to fill the sand and gravel inside, so as to ensure that it remains stable during the bending process after heating;

[0046] Uniformly heat the seamless steel pipe to 800-900℃;

[0047] Place the seamless steel pipe on the jig for bending;

[0048] After cooling and shaping, pour out the sand and gravel in the seamless steel pipe;

[0049] Clean the seamless steel pipe and dry it with hot air at 40-50℃;

[0050] Furthermore, placing the seamless steel pipe on a mold for bending also includes:

[0051] Bend the seamless steel pipe to a preset angle of 3 to 5°;

[0052] When it rebounds to 45°, use water flow to cool and shape it;

[0053] Specifically, a water source can be set at the end of the seamless steel pipe, which is 15 cm away from the end of the seamless steel pipe in the horizontal direction and 15 cm away from the end of the seamless steel pipe in the vertical direction, so that the water source can be opened in time when it rebounds to 45° to cool and shape it;

[0054] It should be noted that according to the actual requirements of the outer wall size, one end of the seamless steel pipe is first processed into a curved section 2, the size of the straight section 1 in the middle is reserved, and then the other end of the seamless steel pipe is processed into a curved section 2, thereby forming a seamless S elbow. Figure 1 As shown, the dimension b of the straight section 1 is adjustable, and the current S-bend is as follows Figure 2 As shown, batch processing is difficult to customize, that is, a seamless S elbow can be used to wrap the gas pipeline around the outer wall, which meets the safety spacing requirements while reducing the number of welds, reduces the risk of high-altitude operations, and also has a certain aesthetic effect on the outer wall;

[0055] During the hot simmering process, the seamless steel pipe is simmered to a greater than preset angle of 3 to 5 degrees to prevent it from rebounding after simmering and causing the bending angle to be insufficient;

[0056] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0057] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A seamless S elbow for town gas pipeline installation, characterized in that: It comprises a straight section and curved sections at both ends of the straight section, wherein the curved sections at both ends of the straight section bend and extend in opposite directions; The curved sections at both ends of the straight section are formed by hot-bending the same seamless steel pipe so that the size of the straight section matches the size of the winding wall.

2. A processing technology for seamless S elbows for town gas pipeline installation, characterized in that: The steps include: Step S1, cutting the base material to obtain a seamless steel pipe; Step S2, hot-simmering one end of the seamless steel pipe to form a curved section; Step S3, reserving a straight section according to a preset length; Step S4, hot-simmering the other end of the seamless steel pipe to form a seamless S-elbow.

3. The processing technology of a seamless S elbow for town gas pipeline installation according to claim 2 is characterized in that: In step S2 and step S4, when hot-simmering the seamless steel pipe, the process includes: Filling sand and gravel into the seamless steel pipe; Uniformly heat the seamless steel pipe to 800-900℃; Place the seamless steel pipe on the jig for bending; After cooling and shaping, pour out the sand and gravel in the seamless steel pipe; Clean the seamless steel pipe and dry it with hot air at 40-50℃.

4. The processing technology of a seamless S elbow for town gas pipeline installation according to claim 3 is characterized in that: Placing the seamless steel pipe on the jig for bending, and also including: Bend the seamless steel pipe to a preset angle of 3 to 5°; When it rebounds to 45°, it is cooled and shaped by water flow.

5. The processing technology of a seamless S elbow for town gas pipeline installation according to claim 3 is characterized in that: Filling sand and gravel into the seamless steel pipe also includes: Use sand and gravel to fill the entire seamless steel pipe. During the filling process, knock on the seamless steel pipe while filling the sand and gravel to fill the sand and gravel inside.

6. The processing technology of a seamless S elbow for town gas pipeline installation according to claim 4 is characterized in that: Also includes: A water source is set at the end of the seamless steel pipe to cool and shape it when it rebounds to 45°.

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