Erosion-resistant pipe bend

Abstract

The utility model relates to natural gas pipeline technical field, concretely relates to a kind of anti-erosion pipeline elbow, including spherical cavity and erosion-resistant layer, spherical cavity is equipped with fluid inlet pipe and fluid outlet pipe in the radial communication, the included angle of the axis of fluid inlet pipe and fluid outlet pipe is less than 180 °, fluid inlet pipe and fluid outlet pipe are symmetrically arranged in the middle section of spherical cavity, erosion-resistant layer is lined in spherical cavity inner wall, erosion-resistant layer is equipped with first hole and second hole, first hole is communicated with fluid inlet pipe, second hole is communicated with fluid outlet pipe. By being provided with spherical cavity between fluid inlet pipe and fluid outlet pipe with certain included angle state, fluid can flow along the arc inner wall of spherical cavity in turning position, reduce direct scouring to inner wall in turning position, to reduce the degree of erosion, extend the service life of elbow, simultaneously, by being provided with erosion-resistant layer in elbow, the erosion resistance of elbow can be improved, to further extend the service life of elbow.

Description

Technical Field

[0001] This utility model relates to the field of natural gas pipeline technology, specifically to an anti-erosion pipeline elbow. Background Technology

[0002] In the field of oil and gas extraction, the extracted oil and gas fluids generally carry gravel. Before these gravels are removed, they are prone to impact and erosion at the turning points of the oil and gas transportation process, causing pipeline leakage risks, safety hazards, and shortening the service life of the pipelines. The pipelines at these turning points need to be replaced periodically. Replacement will inevitably affect the normal extraction efficiency of oil and gas wells, and multiple replacements will also increase the manpower and material costs of oil and gas extraction. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies, such as the fact that the turning points in the existing production and transportation process are easily affected by sand and gravel impacts and erosion, leading to safety hazards, affecting the efficiency of oil and gas well production, and increasing production costs. This invention provides an anti-erosion pipeline elbow.

[0004] This utility model provides an anti-erosion pipe elbow, including

[0005] A spherical cavity, wherein a fluid inlet pipe and a fluid outlet pipe are radially connected on the spherical cavity, the included angle between the axes of the fluid inlet pipe and the fluid outlet pipe is less than 180°, and the fluid inlet pipe and the fluid outlet pipe are symmetrically arranged on both sides of the mid-section of the spherical cavity;

[0006] A corrosion-resistant layer is provided, which is lined within the inner wall of the spherical cavity. The corrosion-resistant layer has a first hole and a second hole, the first hole being connected to the fluid inlet pipe and the second hole being connected to the fluid outlet pipe.

[0007] This utility model discloses an anti-erosion pipe elbow. By setting a spherical cavity between the fluid inlet and outlet pipes at a certain angle, the fluid can flow along the arc-shaped inner wall of the spherical cavity at the bend, reducing direct erosion of the inner wall at the bend, thereby reducing the degree of erosion and extending the service life of the elbow. At the same time, by setting an anti-erosion layer inside the elbow, the erosion resistance of the elbow can be improved, further extending the service life of the elbow. In addition, the internal volume of the spherical cavity is larger than the fluid inlet pipe space. After the fluid changes abruptly in the channel volume, it can reduce the fluid velocity to a certain extent and reduce the erosion effect on the elbow.

[0008] Preferably, the spherical cavity is divided along the mid-section to form an inlet hemisphere and an outlet hemisphere, which are detachably connected. This facilitates the application and replacement of the erosion-resistant layer and allows for easy assembly into elbow structures with different turning angles according to actual conditions, thus expanding the applicability of the elbow.

[0009] Preferably, the erosion-resistant layer is divided along the mid-section to form an inlet portion and an outlet portion, the inlet portion and the outlet portion are spliced ​​together, the inlet portion is lined within the inlet hemisphere, and the outlet portion is lined within the outlet hemisphere. This further facilitates the replacement and installation of the erosion-resistant layer.

[0010] Preferably, the inlet portion is provided with a first limiting ring along the mid-section, and the outlet portion is provided with a second limiting ring along the mid-section. The first limiting ring and the second limiting ring are embedded between the inlet hemisphere and the outlet hemisphere, and a sealing gasket is embedded between the first limiting ring and the second limiting ring. This ensures the erosion-resistant layer remains stable under fluid action and guarantees the sealing of the spherical cavity at the splicing assembly position.

[0011] Preferably, the thickness of the erosion-resistant layer gradually decreases from the side where the fluid inlet and outlet pipes are far apart to the side where they are close together. This gradual change in thickness strengthens the structure of the erosion-resistant layer directly facing the fluid inlet pipe, reducing material costs while maintaining the same erosion resistance.

[0012] Preferably, the inner wall of the spherical cavity is provided with a flow guiding component, which divides the spherical cavity into at least two flow channels, and the flow guiding component passes through the erosion-resistant layer. The flow guiding component directly reduces the direct erosion of the erosion-resistant layer by the fluid, which helps extend the service life of the erosion-resistant layer, thereby extending the overall service life of the elbow and reducing the frequency of replacement and the risk of leakage.

[0013] Preferably, the flow guiding component is provided with a protective layer, and the protective layer and the erosion-resistant layer are integrally formed structural components.

[0014] Preferably, the flow guiding component is located at the inlet hemisphere. This allows the flow guiding component to directly divert the fluid entering the spherical cavity, changing the flow direction and velocity of the fluid entering the spherical cavity, thereby reducing direct erosion of the inner wall of the elbow.

[0015] Preferably, the flow guiding component includes a first segment located at the inlet hemisphere and a second segment located at the outlet hemisphere, the first segment and the second segment being able to be spliced ​​and fitted together. The multi-segment flow guiding component can extend the length of the flow guiding channel for the fluid, further reducing the direct scouring of the fluid on the inner wall of the elbow.

[0016] Preferably, the flow guiding component is arc-shaped. The arc-shaped flow guiding component can adapt to the turning state of the fluid, further reducing the direct scouring of the fluid on the inner wall of the bend.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model provides an anti-erosion pipe elbow. By setting a spherical cavity between the fluid inlet pipe and the fluid outlet pipe with a certain included angle, the fluid can flow along the arc-shaped inner wall of the spherical cavity at the bend position, reducing the direct erosion of the inner wall at the bend position, thereby reducing the degree of erosion and extending the service life of the elbow.

[0019] 2. This utility model provides an anti-erosion pipe elbow. By setting an anti-erosion layer inside the elbow, the erosion resistance of the elbow can be improved and the service life of the elbow can be extended.

[0020] 3. This utility model provides an anti-erosion pipe elbow, in which the volume of the spherical cavity is larger than the fluid inlet space. After the fluid undergoes a sudden change in the channel volume, the fluid velocity can be reduced to a certain extent, thereby reducing the scouring effect on the elbow.

[0021] 4. This utility model provides an anti-erosion pipe elbow. By setting the flow guiding component, the direct scouring of the erosion-resistant layer by the fluid can be reduced, which helps to extend the service life of the erosion-resistant layer, thereby extending the overall service life of the elbow, reducing the frequency of replacement and the risk of leakage. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the external structure of an anti-erosion pipe elbow in Example 2.

[0023] Figure 2 This is a cross-sectional structural diagram of an anti-erosion pipe elbow according to Example 2.

[0024] Figure 3 for Figure 2 A magnified structural diagram of part M in the middle.

[0025] Figure 4 This is a cross-sectional structural diagram of an anti-erosion pipe elbow according to Example 4.

[0026] Figure 5 for Figure 4 A magnified structural diagram of point N in the middle.

[0027] Marked in the image:

[0028] 1-Spherical cavity, 11-Inlet hemisphere, 12-Outlet hemisphere

[0029] 2-Fluid inlet pipe, 3-Fluid outlet pipe, 4-Midsection,

[0030] 5-Erosion resistant layer, 51-First hole, 52-Second hole, 53-Inlet portion, 54-Outlet portion, 55-First limiting ring, 56-Second limiting ring

[0031] 6-Sealing gasket,

[0032] 7-Flow guiding component, 71-First section, 72-Second section,

[0033] 8- Circulation channel, 9- Protective layer. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0035] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0036] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0037] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0038] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0039] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0040] Example 1

[0041] like Figures 1-2 As shown, an anti-erosion pipe elbow includes a spherical cavity 1 and an anti-erosion layer 5. The anti-erosion layer 5 is lined to the inner wall of the spherical cavity 1. A fluid inlet pipe 2 and a fluid outlet pipe 3 are radially connected on the spherical cavity 1. The included angle between the axes of the fluid inlet pipe 2 and the fluid outlet pipe 3 is less than 180°. The fluid inlet pipe 2 and the fluid outlet pipe 3 are symmetrically arranged on both sides of the mid-section 4 of the spherical cavity 1. The anti-erosion layer 5 has a first hole 51 and a second hole 52. The first hole 51 is connected to the fluid inlet pipe 2, and the second hole 52 is connected to the fluid outlet pipe 3.

[0042] The spherical cavity 1 is hollow in shape. The spherical cavity 1 is used to provide turning space for the turning position of the elbow. When in use, the fluid enters the spherical cavity 1 from the fluid inlet pipe 2. Since the fluid inlet pipe 2 and the fluid outlet pipe 3 have an angle of less than 180°, the fluid can be output along the fluid outlet pipe 3 after scouring the inner wall of the spherical cavity 1 and turning, thus realizing the fluid turning.

[0043] In an optional embodiment, the included angle between the axes of the fluid inlet pipe 2 and the fluid outlet pipe 3 can be set according to the actual situation, preferably 90°.

[0044] In an optional embodiment, both the fluid inlet pipe 2 and the fluid outlet pipe 3 can be equipped with flanges at the ends away from the spherical cavity 1 to enable quick connection of the elbow to other piping systems.

[0045] The erosion-resistant layer 5 is a structural component that is lined within the spherical cavity 1. The erosion-resistant layer 5 is made of a different material than the spherical cavity 1. The erosion-resistant layer 5 can be a material component with existing anti-scratch, anti-collision, and anti-corrosion characteristics, such as high-chromium cast iron. It can be integrally prepared with the spherical cavity 1 using a bimetallic composite casting process to form a double-layer composite structure with an outer layer of carbon steel and an inner layer of high-chromium cast iron. This is used to improve the elbow's anti-erosion ability under the scouring action of fluids containing sand, and to protect the spherical cavity 1.

[0046] In an optional embodiment, the thickness of the erosion-resistant layer 5 can be set to gradually decrease from the side where the fluid inlet pipe 2 and the fluid outlet pipe 3 are far apart to the side where they are close together. This allows the erosion-resistant layer 5 on the side where the fluid inlet pipe 2 and the fluid outlet pipe 3 are far apart to be thicker than the other side. By gradually changing the thickness of the erosion-resistant layer 5, the erosion-resistant layer 5 directly facing the fluid inlet pipe 2 can be structurally strengthened, thereby reducing material costs while maintaining the same erosion resistance.

[0047] This embodiment of an anti-erosion pipe elbow, by setting a spherical cavity 1 between the fluid inlet pipe 2 and the fluid outlet pipe 3 with a certain included angle, allows the fluid to flow along the arc-shaped inner wall of the spherical cavity 1 at the bend position, reducing direct erosion of the inner wall at the bend position, thereby reducing the degree of erosion and extending the service life of the elbow. At the same time, by setting an anti-erosion layer 5 inside the elbow, the erosion resistance of the elbow can be improved, further extending the service life of the elbow. This embodiment of an anti-erosion pipe elbow can be applied to the wellhead bend of the fluid in a water jacket furnace.

[0048] Example 2

[0049] like Figures 1-2 As shown, an anti-erosion pipe elbow, based on embodiment 1, can also be divided along the mid-section 4 to form an inlet hemisphere 11 and an outlet hemisphere 12, which are detachably connected.

[0050] In this embodiment, an anti-erosion pipe elbow is provided. The spherical cavity 1 is assembled from an inlet hemisphere 11 and an outlet hemisphere 12. The erosion-resistant layer 5 is easy to install and replace. It can also be assembled into elbow structures with different turning angles according to actual conditions, thus expanding the applicability of the elbow.

[0051] In an optional embodiment, the inlet hemisphere 11 and the outlet hemisphere 12 can be respectively provided with connecting flanges at the mid-section 4, thereby realizing the assembly into a sphere through flange and bolt connection.

[0052] Example 3

[0053] like Figures 1-3 As shown, in an anti-erosion pipe elbow, based on embodiment 2, the erosion-resistant layer 5 can also be divided along the mid-section 4 to form an inlet portion 53 and an outlet portion 54. The inlet portion 53 and the outlet portion 54 are spliced ​​together, with the inlet portion 53 lined with the inlet hemisphere 11 and the outlet portion 54 lined with the outlet hemisphere 12.

[0054] In this embodiment, the anti-erosion pipe elbow can also be composed of two parts: the inlet part 53 and the outlet part 54 are assembled and pressed onto the inner wall of the spherical cavity 1. They can be disassembled by assembly, which can further facilitate the replacement and installation of the anti-erosion layer 5.

[0055] In an optional embodiment, the inlet portion 53 may be provided with a first limiting ring 55 along the mid-section 4, and the outlet portion 54 may be provided with a second limiting ring 56 along the mid-section 4. The first limiting ring 55 and the second limiting ring 56 may be stacked and embedded between the inlet hemisphere 11 and the outlet hemisphere 12. The bolt used to connect the inlet hemisphere 11 and the outlet hemisphere 12 passes through the first limiting ring 55 and the second limiting ring 56 at the same time, which can realize the clamping and fixing of the erosion-resistant layer 5 between the inlet hemisphere 11 and the outlet hemisphere 12, and can realize the stable connection between the erosion-resistant layer 5 and the spherical cavity 1, so as to realize the continuous and stable setting of the erosion-resistant layer 5 under the action of fluid.

[0056] In an optional embodiment, a sealing gasket 6 may be embedded between the first limiting ring 55 and the second limiting ring 56 to ensure the sealing of the spherical cavity 1 at the splicing assembly position and prevent fluid leakage.

[0057] Example 4

[0058] like Figures 1-5 As shown, an anti-erosion pipe elbow, based on any one of Embodiments 1-3, may have a flow guiding component 7 provided on the inner wall of the spherical cavity 1. The flow guiding component 7 protrudes from the inner wall of the spherical cavity 1 and can pass through the erosion-resistant layer 5 and extend into the erosion-resistant layer 5, and can divide and form at least two flow channels 8 within the spherical cavity 1.

[0059] In an optional embodiment, the flow guiding component 7 may be provided with a protective layer 9, and the protective layer 9 and the erosion-resistant layer 5 may be an integrally formed structural component.

[0060] In an optional embodiment, the flow guiding component 7 may be located only at the inlet hemisphere 11. This allows the flow guiding component 7 to directly divert the fluid entering the spherical cavity 1, changing the flow direction and velocity of the fluid entering the spherical cavity 1, thereby reducing the direct scouring of the inner wall of the elbow.

[0061] In an optional embodiment, the flow guide 7 can be arc-shaped. The arc-shaped flow guide 7 can adapt to the turning state of the fluid, further reducing the direct scouring of the fluid on the inner wall of the bend.

[0062] In one or more embodiments, the flow guiding component 7 may include a first segment 71 located at the inlet hemisphere 11 and a second segment 72 located at the outlet hemisphere 12, wherein the first segment 71 and the second segment 72 can be spliced ​​and fitted together. The multi-segment flow guiding component 7 can extend the length of the flow guiding channel for the fluid, further reducing the direct scouring of the fluid on the inner wall of the elbow.

[0063] like Figure 4 As shown, in this embodiment, an anti-erosion pipe elbow has two arc-shaped flow guide components 7 arranged at one end of the spherical cavity 1 near the fluid inlet pipe 2. The two flow guide components 7 have different lengths and are located at one-third and two-thirds of the interface between the fluid inlet pipe 2 and the spherical cavity 1, respectively, forming three flow channels 8. The fluid input from the fluid inlet pipe 2 is processed in three parts through the two flow guide components 7, forming a multi-layer fluid within the flow guide portion. The multi-layer fluid scours the interior of the spherical cavity 1 with its multi-layer structure, reducing the scouring force of each layer of fluid. Combined with the erosion-resistant layer 5, it reduces the direct erosion of the spherical cavity 1 by the fluid, minimizing the risk of leakage in the spherical cavity 1 and achieving effective protection for the elbow.

[0064] like Figure 5 As shown, the flow guiding component 7 can preferably be provided with an arc-shaped shuttle structure, which can further adapt to the arc-shaped characteristics and scouring characteristics of fluid turning flow, and realize the smooth flow guiding of fluid.

[0065] This embodiment of an anti-erosion pipe elbow, based on embodiments 1, 2, and 3, directly reduces the direct scouring of the erosion-resistant layer 5 by the inclusion of a flow guiding component 7. This helps extend the service life of the erosion-resistant layer 5, thereby extending the overall service life of the elbow, reducing the frequency of replacement and the risk of leakage. By diverting the fluid at the bend position through the flow guiding component 7, and combined with the removable lining of the erosion-resistant layer 5, the erosion resistance of the elbow is greatly improved, providing excellent protection for the pipe elbow.

[0066] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An anti-erosion pipe elbow, characterized in that, include A spherical cavity (1) is provided with a fluid inlet pipe (2) and a fluid outlet pipe (3) that are radially connected on the spherical cavity (1). The included angle between the axes of the fluid inlet pipe (2) and the fluid outlet pipe (3) is less than 180°. The fluid inlet pipe (2) and the fluid outlet pipe (3) are symmetrically arranged on both sides of the mid-section (4) of the spherical cavity (1). The erosion-resistant layer (5) is lined inside the inner wall of the spherical cavity (1). The erosion-resistant layer (5) has a first hole (51) and a second hole (52). The first hole (51) is connected to the fluid inlet pipe (2), and the second hole (52) is connected to the fluid outlet pipe (3).

2. The anti-erosion pipe elbow according to claim 1, characterized in that, The spherical cavity (1) is divided along the mid-section (4) to form an inlet hemisphere (11) and an outlet hemisphere (12), which are detachably connected.

3. The anti-erosion pipe elbow according to claim 2, characterized in that, The erosion-resistant layer (5) is divided along the mid-section (4) to form an inlet portion (53) and an outlet portion (54). The inlet portion (53) and the outlet portion (54) are spliced ​​together. The inlet portion (53) is lined with the inlet hemisphere (11), and the outlet portion (54) is lined with the outlet hemisphere (12).

4. The anti-erosion pipe elbow according to claim 3, characterized in that, The inlet portion (53) is provided with a first limiting ring (55) along the mid-section (4), and the outlet portion (54) is provided with a second limiting ring (56) along the mid-section (4). The first limiting ring (55) and the second limiting ring (56) are embedded between the inlet hemisphere (11) and the outlet hemisphere (12), and a sealing gasket (6) is embedded between the first limiting ring (55) and the second limiting ring (56).

5. The anti-erosion pipe elbow according to claim 1, characterized in that, The thickness of the erosion-resistant layer (5) gradually decreases from the side where the fluid inlet pipe (2) and the fluid outlet pipe (3) are far apart to the side where the fluid inlet pipe (2) and the fluid outlet pipe (3) are close to each other.

6. An anti-erosion pipe elbow according to any one of claims 1-5, characterized in that, The inner wall of the spherical cavity (1) is provided with a flow guiding component (7), which divides the spherical cavity (1) to form at least two flow channels (8) and passes through the erosion resistant layer (5).

7. The anti-erosion pipe elbow according to claim 6, characterized in that, The flow guide component (7) is provided with a protective layer (9), and the protective layer (9) and the erosion resistant layer (5) are integrally formed structural components.

8. The anti-erosion pipe elbow according to claim 6, characterized in that, The flow guide component (7) is located on the inlet hemisphere (11).

9. The anti-erosion pipe elbow according to claim 6, characterized in that, The flow guiding component (7) includes a first section (71) located on the inlet hemisphere (11) and a second section (72) located on the outlet hemisphere (12), and the first section (71) and the second section (72) can be spliced ​​and fitted together.

10. The anti-erosion pipe elbow according to claim 6, characterized in that, The flow guiding component (7) is arc-shaped.

Images