Natural gas conveying pipeline

Abstract

The utility model discloses a natural gas conveying pipeline which comprises an outer conveying pipe and an inner supporting pipe arranged in the outer conveying pipe, the outer wall of the inner supporting pipe is tightly attached to the inner wall of the outer conveying pipe, and the pipeline hardness of the inner supporting pipe is larger than that of the outer conveying pipe. A plurality of novel pipeline supporting and protecting devices are additionally arranged outside the natural gas conveying pipeline, the novel pipeline supporting and protecting devices can play a role in supporting and placing the natural gas conveying pipeline in a pre-buried pit, and meanwhile, the pre-buried pit can be backfilled after the natural gas conveying pipeline is laid; after the pre-buried pit is backfilled, the pipeline supporting and protecting device can play a protection role on the exterior of the upper side of the natural gas conveying pipeline, and the exterior of the top end of the natural gas conveying pipeline can be isolated from backfilled soil through the pipeline supporting and protecting device; and the situation that the pipeline is prone to rot due to the fact that backfilled soil makes contact with the natural gas conveying pipeline for a long time is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field related to natural gas pipelines, and particularly relates to a transportation pipeline for natural gas. Background Technique

[0002] As a clean and efficient energy source, natural gas has been widely used globally. To meet the requirements of long-distance transportation and long-term stable supply, natural gas transportation pipeline technology has emerged and continuously developed and improved. The transportation pipeline for natural gas is mainly used for transporting natural gas. Therefore, when installing and using the transportation pipeline for natural gas, it is necessary to excavate a pipeline pre-burial pit on the ground according to the laying route of the transportation pipeline for natural gas, and then the transportation pipeline for natural gas needs to be laid in the pre-burial pit. After the laying is completed, the pre-burial pit needs to be backfilled, so as to protect the transportation pipeline for natural gas in the pre-burial pit.

[0003] However, after the transportation pipeline for natural gas is laid in the pre-burial pit and the pre-burial pit is backfilled, the backfilled soil will be directly laid on the transportation pipeline for natural gas in the pre-burial pit. Excessive backfilled soil will have a strong squeezing effect on the transportation pipeline for natural gas in the pre-burial pit, which will easily damage the transportation pipeline for natural gas. And the long-term direct contact between the soil and the transportation pipeline for natural gas will accelerate the corrosion speed of the pipeline, thus shortening the service life of the transportation pipeline for natural gas. Content of the Utility Model

[0004] The purpose of the utility model is to provide a transportation pipeline for natural gas to solve the problem that after the transportation pipeline for natural gas is laid in the pre-burial pit and the pre-burial pit is backfilled, the backfilled soil will be directly laid on the transportation pipeline for natural gas in the pre-burial pit, and excessive backfilled soil will have a strong squeezing effect on the transportation pipeline for natural gas in the pre-burial pit, which will easily damage the transportation pipeline for natural gas as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A transportation pipeline for natural gas, including an outer transportation pipe and an inner support pipe arranged inside the outer transportation pipe. The outer wall of the inner support pipe is closely attached to the inner wall of the outer transportation pipe. The pipeline hardness of the inner support pipe is greater than that of the outer transportation pipe. A plurality of pipeline support and protection devices are arranged outside the outer transportation pipe;

[0006] The pipeline support and protection device includes a cement placement pier, a semi-circular placement groove and a horizontal support bracket. A semi-circular placement groove is arranged inside the upper half of the cement placement pier. The semi-circular placement groove is recessed downward inside the cement placement pier. The outer transportation pipe is placed in the semi-circular placement groove. Horizontal support brackets are arranged at the top of both the left and right ends of the cement placement pier.

[0007] Preferably, the horizontal support bracket is made of aluminum alloy. The horizontal support bracket is fixedly connected to the cement placement pier through a plurality of screws. The two horizontal support brackets are respectively located on the left and right sides of the outer conveying pipe.

[0008] Preferably, the pipeline support and protection device further includes an arc support protection frame A, an arc protection plate and an arc support protection frame B. The arc support protection frame A is connected to the top of the front ends of the two horizontal support brackets, and the arc support protection frame B is connected to the top of the rear ends of the two horizontal support brackets. An arc protection plate is connected to the outer walls of the tops of the arc support protection frame A and the arc support protection frame B.

[0009] Preferably, both the arc support protection frame A and the arc support protection frame B are aluminum alloy semi-circular protection frames. Both the arc support protection frame A and the arc support protection frame B are sleeved outside the upper half of the outer conveying pipe. Both the arc support protection frame A and the arc support protection frame B are fixedly connected to the horizontal support bracket by welding.

[0010] Preferably, the arc protection plate is fixedly connected to the arc support protection frame A and the arc support protection frame B by welding. The arc protection plate protects the upper side outside the top of the outer conveying pipe.

[0011] Preferably, butt flanges are provided on the outer parts of the front and rear ends of the outer conveying pipe. A plurality of screw holes are equidistantly arranged inside the butt flange. A protective coating is also sprayed on the outer wall of the outer conveying pipe.

[0012] Compared with the prior art, the present utility model provides a conveying pipeline for natural gas, having the following

[0013] Beneficial effects:

[0014] By adding a plurality of new pipeline support and protection devices to the outside of the conveying pipeline for natural gas, the new pipeline support and protection devices can support and place the conveying pipeline for natural gas in the pre-buried pit, so that the conveying pipeline for natural gas can be suspended in the pre-buried pit. At the same time, when the conveying pipeline for natural gas is laid, the pre-buried pit will be backfilled. After the pre-buried pit is backfilled, the pipeline support and protection device can generate a protective effect on the upper side outside the conveying pipeline for natural gas. This device can isolate the outside of the top of the conveying pipeline for natural gas from the backfilled soil, so as to prevent the situation that the backfilled soil is in contact with the conveying pipeline for natural gas for a long time and easily corrodes the pipeline, and at the same time can also prevent the situation that the backfilled soil strongly presses the pipeline and causes pipeline damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of a conveying pipeline for natural gas of the present utility model.

[0016] Figure 2 Schematic three-dimensional structure diagram of the pipeline support and protection device of the present utility model.

[0017] Figure 3 Schematic plan structure diagram of the pipeline support and protection device of the present utility model.

[0018] In the figure: 1, docking flange; 2, inner support pipe; 3, outer conveying pipe; 4, pipeline support and protection device; 5, arc support protection frame A; 6, cement placement pier; 7, semi-circular placement groove; 8, horizontal support bracket; 9, arc protection plate; 10, arc support protection frame B. Specific implementation manners

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] The present utility model provides a natural gas conveying pipeline as shown in Figures 1-3 , which includes an outer conveying pipe 3 and an inner support pipe 2 arranged inside the outer conveying pipe 3. The outer wall of the inner support pipe 2 is in close fit with the inner wall of the outer conveying pipe 3. The pipeline hardness of the inner support pipe 2 is greater than that of the outer conveying pipe 3. Docking flanges 1 are arranged outside both the front and rear ends of the outer conveying pipe 3. A plurality of screw holes are equidistantly arranged inside the docking flanges 1. A protective coating is also sprayed on the outer wall of the outer conveying pipe 3. When installing and using this natural gas conveying pipeline, first, it is necessary to dig a pre-buried pit for the natural gas conveying pipeline on the ground according to the route of laying the natural gas conveying pipeline. After the pre-buried pit is dug, it is necessary to place the natural gas conveying pipeline into the pre-buried pit, and the natural gas conveying pipelines in the pre-buried pit need to be connected to form a complete pipeline. When docking the natural gas conveying pipelines, it is necessary to fit the docking flanges 1 outside two adjacent outer conveying pipes 3 to each other, and then use screws to connect and fix the mutually fitted docking flanges 1. Then, other pipelines are connected in the same way until the natural gas conveying pipelines in the pre-buried pit form a complete conveying pipeline. Then, it is necessary to backfill the pre-buried pit so that the natural gas conveying pipeline is completely protected in the pre-buried pit. Finally, the natural gas conveying pipeline can be used to convey natural gas.

[0021] As shown in Figure 1 , Figure 2 and Figure 3As shown in the figure, multiple pipeline support and protection devices 4 are arranged outside the outer conveying pipe 3. The pipeline support and protection device 4 includes a cement placement pier 6, a semi-circular placement groove 7, and a horizontal support bracket 8. A semi-circular placement groove 7 is arranged inside the upper half of the cement placement pier 6. The semi-circular placement groove 7 is recessed downward inside the cement placement pier 6. The outer conveying pipe 3 is placed in the semi-circular placement groove 7. Horizontal support brackets 8 are arranged at the tops of the left and right ends of the cement placement pier 6. The horizontal support brackets 8 are made of aluminum alloy. The horizontal support brackets 8 are fixedly connected to the cement placement pier 6 through multiple screws. The two horizontal support brackets 8 are respectively located on the left and right sides of the outer conveying pipe 3. The pipeline support and protection device 4 further includes an arc-shaped support protection frame A 5, an arc-shaped protection plate 9, and an arc-shaped support protection frame B 10. The arc-shaped support protection frame A 5 is connected to the tops of the fronts of the two horizontal support brackets 8. The arc-shaped support protection frame B 10 is connected to the tops of the rears of the two horizontal support brackets 8. An arc-shaped protection plate 9 is connected to the outer walls of the tops of the arc-shaped support protection frame A 5 and the arc-shaped support protection frame B 10. Both the arc-shaped support protection frame A 5 and the arc-shaped support protection frame B 10 are aluminum alloy semi-circular protection frames. Both the arc-shaped support protection frame A 5 and the arc-shaped support protection frame B 10 are sleeved and protected outside the upper half of the outer conveying pipe 3. Both the arc-shaped support protection frame A 5 and the arc-shaped support protection frame B 10 are fixedly connected to the horizontal support brackets 8 by welding.

[0022] As Figure 1 , Figure 2 and Figure 3As shown in the figure, the arc-shaped protection plate 9 is fixedly connected to both the arc-shaped support protection frame A5 and the arc-shaped support protection frame B10 by welding. The arc-shaped protection plate 9 protects the upper side of the top of the outer conveying pipe 3. When installing the natural gas conveying pipeline into the pre-buried pit, two or more pipeline support protection devices 4 need to be placed into the pre-buried pit, and then the natural gas conveying pipeline is placed on the pipeline support protection device 4. During specific operation, the cement placement pier 6 needs to be stably placed into the pre-buried pit, and then the natural gas conveying pipeline needs to be placed into the arc-shaped placement groove inside the top of the cement placement pier 6. In this way, the natural gas conveying pipeline can be stably and securely installed in the pre-buried pit through the cement placement pier 6. Then, the interconnected horizontal support bracket 8, the arc-shaped support protection frame A5, the arc-shaped protection plate 9, and the arc-shaped support protection frame B10 need to be installed on the cement placement pier 6, so that the interconnected horizontal support bracket 8, the arc-shaped support protection frame A5, the arc-shaped protection plate 9, and the arc-shaped support protection frame B10 play a protective role outside the top of the natural gas conveying pipeline. Specifically, two horizontal support brackets 8 need to be respectively attached to the tops of the left and right ends of the cement placement end, and then multiple screws are used to firmly fix the horizontal support bracket 8 on the cement placement pier 6. In this way, the arc-shaped protection plate 9 is protected outside the top of the natural gas conveying pipeline by the arc-shaped support protection frame A5 and the arc-shaped support protection frame B10. When backfilling the pre-buried pit, the arc-shaped support protection frame A5, the arc-shaped support protection frame B10, and the arc-shaped protection plate 9 can block the backfill soil from directly backfilling on the natural gas conveying pipeline, thereby protecting the natural gas conveying pipeline.

[0023] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A natural gas delivery pipeline, comprising an outer delivery pipe (3) and an inner support pipe (2) arranged inside the outer delivery pipe (3), wherein the outer wall of the inner support pipe (2) is tightly fitted with the inner wall of the outer delivery pipe (3), and the pipeline hardness of the inner support pipe (2) is greater than the pipeline hardness of the outer delivery pipe (3), characterized in that: A plurality of pipeline supporting and protecting devices (4) are arranged outside the outer delivery pipe (3); The pipeline support and protection device (4) comprises a cement placement pier (6), a semicircular placement groove (7) and a horizontal support bracket (8); a semicircular placement groove (7) is arranged inside the upper half of the cement placement pier (6); the semicircular placement groove (7) is recessed downward inside the cement placement pier (6); the outer conveying pipe (3) is placed in the semicircular placement groove (7); and horizontal support brackets (8) are arranged on the tops of both left and right ends of the cement placement pier (6).

2. A natural gas transmission pipeline according to claim 1, characterized in that: The horizontal support bracket (8) is made of aluminum alloy, and is fixedly connected to the cement placement pier (6) by a plurality of screws. The two horizontal support brackets (8) are respectively located on the left and right sides of the outer conveying pipe (3).

3. A natural gas transmission pipeline according to claim 2, characterized in that: The pipeline support and protection device (4) also includes an arc-shaped support and protection frame A (5), an arc-shaped protection plate (9) and an arc-shaped support and protection frame B (10), wherein the arc-shaped support and protection frame A (5) is connected to the top of the front end of the two horizontal support frames (8), and the arc-shaped support and protection frame B (10) is connected to the top of the rear end of the two horizontal support frames (8), and the outer walls of the top ends of the arc-shaped support and protection frame A (5) and the arc-shaped support and protection frame B (10) are connected to the arc-shaped protection plate (9).

4. A natural gas transmission pipeline according to claim 3, characterized in that: The arc-shaped support and protection frame A (5) and the arc-shaped support and protection frame B (10) are both semicircular protection frames made of aluminum alloy. The arc-shaped support and protection frame A (5) and the arc-shaped support and protection frame B (10) are both sleeved and protected on the outside of the upper half of the outer conveying pipe (3). The arc-shaped support and protection frame A (5) and the arc-shaped support and protection frame B (10) are both fixedly connected to the horizontal support bracket (8) by welding.

5. A natural gas transmission pipeline according to claim 4, characterized in that: The arc-shaped protection plate (9) is fixedly connected to the arc-shaped support and protection frame A (5) and the arc-shaped support and protection frame B (10) by welding, and the arc-shaped protection plate (9) protects the upper outside of the top end of the outer delivery pipe (3).

6. A natural gas transmission pipeline according to claim 1, characterized in that: The front and rear ends of the outer delivery pipe (3) are both provided with docking flanges (1), and a plurality of screw holes are evenly spaced inside the docking flange (1). The outer wall of the outer delivery pipe (3) is also sprayed with a protective coating.

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