A flexible buried oil and gas elbow protection device

Abstract

The present invention relates to a bendable buried oil and gas elbow protection device, which consists of an oil and gas elbow body, a flexible buffer layer, a plastic buffer layer, an inner corrugated shell, a high-strength spring, warning smoke, an outer corrugated shell, an axial port connecting ring, a port connecting hole, a radial port connecting plate, and a bolt assembly. The plastic buffer layer is bonded to the outer surface of the flexible buffer layer and the inner wall of the inner corrugated shell, and the buffer layer plays a role in buffering external forces; the inner and outer corrugated shells are made of austenitic stainless steel, which plays a major role in resisting external force impact; the high-strength spring is clamped between the inner and outer corrugated shells, which plays a major role in buffering external forces; orange pressurized warning smoke fills the gap in the high-strength spring, which plays a warning role in the event of overflow; the axial port connecting ring and the port connecting hole play an axial fixing role, the radial port connecting plate plays a radial fixing role, and the bolt assembly plays a connecting role. The characteristics of the present invention are: it is suitable for oil and gas elbows, the warning role is fast and effective, it can be installed as a whole, and it has a strong pipeline protection capability.

Description

Technical Field

[0001] The present invention relates to the field of oil and gas storage and transportation pipeline safety, and in particular to a bendable buried oil and gas elbow protection device. Background Art

[0002] Oil and natural gas are important strategic resources and the material foundation for national economic development, crucial to a nation's economic development, social stability, and national security. Pipeline transportation, the primary mode of oil and gas transportation, is primarily underground. However, third-party damage (such as excavation, drilling, and surface loads) and natural geological disasters (such as landslides, debris flows, and rockfalls) are currently the leading causes of pipeline failure. Therefore, research on pipeline safety protection is essential.

[0003] At present, domestic oil and gas pipeline protection devices generally focus on straight oil and gas pipes, while seriously neglecting the safety protection that should be provided for oil and gas bends. As a result, existing protection devices cannot be applied to the protection of oil and gas bends due to their inflexibility. In addition, existing protection devices are mostly focused on resisting the external forces acting on the pipeline, and rarely consider the prompts and warnings that should be given to the human force-applying party between the initial force damage and the second damage to the pipeline, which cannot fully play the role of protecting oil and gas pipelines. In addition, existing oil and gas pipeline protection devices are mostly assembled on-site by laying a protective layer along the radial direction of the pipeline. This method requires laying layers on-site, and the construction process is complicated and takes a long time, which can easily delay the overall construction progress on site.

[0004] Therefore, in order to solve the problem of safety protection of buried oil and gas elbows under the influence of third-party damage and natural geological disasters, a corresponding protection device needs to be developed, mainly targeting technical problems such as the existing protection device is not suitable for oil and gas elbows, lacks prompts and warning functions, and the on-site installation procedure is complicated and requires a long construction time. Summary of the Invention

[0005] In order to solve the problems raised by the background technology, the purpose of the present invention is to overcome the problems that most of the existing domestic oil and gas pipeline protection devices are not suitable for oil and gas bends, have no warning effect or insufficient warning effect, and the installation of the device takes a long time, and to provide a flexible buried oil and gas bend protection device that is easy to construct and install and has a warning effect.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A flexible, buried oil and gas pipe elbow protection device primarily comprises an oil and gas pipe elbow body, a flexible buffer layer, a plastic buffer layer, an inner corrugated shell, a high-strength spring, a warning smoke, an outer corrugated shell, an axial port connecting ring, a port connecting hole, a radial port connecting plate, and a bolt assembly. The flexible, buried oil and gas pipe elbow protection device can be divided into two identically constructed upper and lower parts, which are bolted together by the bolt assembly.

[0008] In the above scheme, taking the upper half of the protective device as an example, the flexible buffer layer is tightly attached to the surface of the oil and gas elbow body, the plastic buffer layer is bonded to the outer surface of the flexible buffer layer, the inner corrugated shell and the plastic buffer layer are connected by bonding, the plastic buffer layer is bonded to the inner wall of the inner corrugated shell, and the outer corrugated shell and the inner corrugated shell are distributed in concentric circles with the center of the cross section of the oil and gas elbow as the same center.

[0009] In the above scheme, the radial port connecting plate is made of the same material as the corrugated shell, and is welded to the radial port of the semi-annular column structure formed between the inner and outer corrugated shells to achieve sealing of the radial left and right ports. The axial port connecting ring is made of the same material as the corrugated shell, and is welded to the axial port of the semi-annular column structure formed between the inner and outer corrugated shells to achieve sealing of the axial front and rear ports, thereby forming a semi-annular closed space.

[0010] In the above scheme, the high-strength spring welding clamp is installed in the semi-cylindrical enclosed space between the outer corrugated shell and the inner corrugated shell; the warning smoke is filled in large quantities in the semi-cylindrical enclosed space by filling; the port connection hole is a threaded hole, which is distributed in an axial double hole on the axial port connection ring.

[0011] Preferably, the flexible buffer layer is made of rock wool material with good thermal insulation, excellent fire resistance and long-lasting chemical stability, and the plastic buffer layer is made of rubber material with strong elasticity, good flexibility and good air tightness. The flexible buffer layer and the plastic buffer layer are both distributed in a semi-annular shape in the upper half of the protective device, and the thickness of the two is the same, which is equal to the wall thickness of the oil and gas elbow.

[0012] Preferably, the inner corrugated shell, the outer corrugated shell and the radial port connecting plate are all made of austenitic stainless steel, and the thickness of the three is the same, which is 0.5 times the wall thickness of the oil and gas elbow;

[0013] Preferably, the high-strength springs are installed vertically in the radial direction of the cross section of the protective device and are distributed at equal intervals in the annular direction, with a total of 42 springs distributed in the annular direction;

[0014] Preferably, the warning smoke is orange in color and made of non-toxic and environmentally friendly materials. It is filled into the semi-cylindrical enclosed space in a weak pressure form. When the outer corrugated shell is damaged by external force and ruptures, the pressure carried by the warning smoke helps to quickly push it into the external environment through the rupture, thereby increasing the escape speed of the warning smoke and enhancing the smoke warning effect.

[0015] Preferably, the axial port connecting ring is made of austenitic stainless steel, and the port connecting holes are distributed at 30°, 90°, 150°, 210°, 270° and 330° on the cross section of the axial port connecting ring of the flexible buried oil and gas elbow protection device, respectively, and are symmetrically distributed up and down, and also symmetrically distributed left and right. The axial port connecting ring is distributed in an axial double-hole pattern, so there are a total of 12 port connecting holes distributed on the axial port connecting ring at the front or rear end.

[0016] The present invention has the following advantages:

[0017] (1) The present invention adopts a corrugated shell, making full use of its remarkable characteristic of excellent bending, avoiding the inapplicability of existing protective devices on oil and gas elbows, and promoting the protection of buried oil and gas elbows; at the same time, under the influence of third-party damage or natural geological disasters such as mud and rock flows and landslides, the high-strength corrugated shell can effectively withstand external force impact, avoiding or greatly reducing the damage that may be caused to the oil and gas elbow by the external environment;

[0018] (2) The present invention uses a high-strength spring, which can resist part of the external force when the oil and gas elbow is impacted by external force. At the same time, the strong deformation capacity of the high-strength spring can greatly play a buffering role, greatly reducing the impact of external force;

[0019] (3) The present invention uses warning smoke. When the protective device is damaged by external force, orange warning smoke can be instantly emitted in large quantities, quickly and effectively prompting and alerting the external force-applying party, so that the external force-applying party can immediately stop the destructive behavior.

[0020] (4) The present invention adopts a double buffer layer of a flexible buffer layer and a plastic buffer layer. The flexible buffer layer can promote the heat preservation and transportation of oil and gas pipelines. The plastic buffer layer can effectively realize the buffering function when the pipeline is subjected to external force, and provide a certain degree of buffering protection for the outer surface of the pipeline.

[0021] (5) The present invention adopts an integrated installation method. The upper and lower parts of the protective device are completely identical in structure. Both parts can be installed separately. After the installation is completed, the upper and lower parts are assembled to form the protective device. The protective device can be installed in advance during the manufacturing stage, which greatly facilitates construction and transportation, and is conducive to simple assembly by on-site construction personnel, saving a lot of transportation costs and a lot of installation time.

[0022] In general, the advantages of the present invention can be summarized as follows: it can be used for both bent oil and gas pipes and straight oil and gas pipes, with a wide range of applications; it can withstand external force impacts and has high protection strength; it can achieve a buffering effect and has a significant external force weakening effect; the warning smoke can gush out instantly, and the prompt alarm function is fast and effective; it can be installed as a whole, with high overall installation efficiency and strong pipeline protection capabilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a longitudinal cross-sectional schematic diagram of a bendable buried oil and gas elbow protection device of the present invention.

[0024] Figure 2 It is a schematic AA cross-sectional view of a flexible buried oil and gas elbow protection device of the present invention.

[0025] Figure 3 It is a BB cross-sectional schematic diagram of a bendable buried oil and gas elbow protection device of the present invention.

[0026] Figure 4 The diagram is a longitudinal cross-sectional view of two adjacent sets of a bendable buried oil and gas elbow protection device of the present invention being bolted together in the axial direction.

[0027] Figure 5 The diagram is a top view of the relative positions of two adjacent sets of bendable buried oil and gas elbow protection devices in the axial direction according to the present invention.

[0028] Figure 6 It is a partially enlarged schematic diagram of the position of the axial port connecting ring when two adjacent sets of a bendable buried oil and gas elbow protection device of the present invention are axially bolted together.

[0029] In the figure: 1. Oil and gas elbow body; 2. Buffer layer; 21. Flexible buffer layer; 22. Plastic buffer layer; 3. Protective shell; 31. Inner corrugated shell; 32. High-strength spring; 33. Warning smoke; 34. Outer corrugated shell; 35. Axial port connecting ring; 4. Port connecting hole; 5. Radial port connecting plate; 6. Bolt assembly. DETAILED DESCRIPTION

[0030] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. The following descriptions are merely examples of the present invention and are not intended to limit the patent scope of the present invention.

[0031] As shown in the figure, a flexible buried oil and gas pipe bend protective device according to the present invention primarily comprises an oil and gas pipe bend body 1, a buffer layer 2, a flexible buffer layer 21, a plastic buffer layer 22, a protective shell 3, an inner corrugated shell 31, a high-strength spring 32, a warning smoke hood 33, an outer corrugated shell 34, an axial port connecting ring 35, a port connecting hole 4, a radial port connecting plate 5, and a bolt assembly 6. The buffer layer 2 and protective shell 3 are bonded together and, after installation, form a single, integral part. The upper and lower parts, after aligning the radial port connecting plate 5, are then connected and assembled via the bolt assembly 6 to form the flexible buried oil and gas pipe bend protective device according to the present invention. Axially adjacent protective devices, after aligning the port connecting holes 4 on the axial port connecting ring 35, are then connected via the bolt assembly 6 to securely connect adjacent protective devices.

[0032] When third-party destruction or natural geological disasters act on the oil and gas elbow body 1 equipped with a flexible buried oil and gas elbow protection device, first, the outer corrugated shell 34 will withstand most of the radial force. Secondly, the high-strength spring 32 will play a highly elastic buffering role, unloading part of the radial force and most of the circumferential force. In addition, its own strength will further withstand part of the radial force. Then, if the outer corrugated shell 34 ruptures, the warning smoke 33 will be instantly ejected in large quantities, playing a timely warning role. The inner corrugated shell 31 further withstands part of the radial force. Finally, the plastic buffer layer 22 further plays a buffering role. The flexible buffer layer 21 can play a partial buffering role due to its high fluffiness. The buffer layer 2 will further reduce the damage that may be caused to the oil and gas elbow body 1 by the external force impact.

Claims

1. A flexible buried oil and gas elbow protection device, characterized by: The invention comprises an oil and gas elbow body (1), a buffer layer (2), a protective shell layer (3), a port connection hole (4), a radial port connection plate (5) and a bolt assembly (6); the buffer layer (2) comprises a flexible buffer layer (21) and a plastic buffer layer (22); the plastic buffer layer (22) is bonded to the outer surface of the flexible buffer layer (21); and the plastic buffer layer (22) is bonded to the inner wall surface of the inner corrugated shell (31); the protective shell layer (3) comprises an inner corrugated shell (31), a high-strength spring (32), a warning smoke (33), an outer corrugated shell (34) and an axial port connection ring (35); a high-strength spring (32) is welded between the inner corrugated shell (31) and the outer corrugated shell (34); the warning smoke (33) is filled in the gap between the high-strength spring (32); and the inner corrugated shell (31) and the outer corrugated shell (34) are connected to each other. The radial left and right ports are welded to the radial port connecting plate (5), and the axial front and rear ports of the inner corrugated shell (31) and the outer corrugated shell (34) are welded to the axial port connecting ring (35); the upper and lower parts of a bendable buried oil and gas elbow protection device are bolted together through the radial port connecting plate (5) and the bolt assembly (6); the high-strength spring (32) is vertically installed in the radial direction of the cross section of the protection device, and is evenly spaced in the annular direction, with a total of 42 springs distributed in the annular direction; the port connecting holes (4) are distributed at positions of 30°, 90°, 150°, 210°, 270° and 330° on the cross section of the axial port connecting ring (35) of the protection device, and are distributed in the form of axial double holes on the axial port connecting ring (35), with a total of 12 springs distributed on the front or rear end axial port connecting ring (35).

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