Safety valve supporting frame

Abstract

The safety valve supporting frame is used for supporting a safety valve on a high-pressure and low-temperature pipeline of a ship, the high-pressure and low-temperature pipeline comprises a main pipeline and a branch pipeline communicated with the main pipeline, the safety valve is connected to the branch pipeline through a branch pipeline flange and communicated with the branch pipeline, and the safety valve supporting frame is made of metal. The safety valve supporting frame comprises a first mounting plate, a second mounting plate, a first connecting pipe, a second connecting pipe and a bent pipe. The first mounting plate is connected to a branch pipe flange; the second mounting plate is connected to a main pipeline; one end of the first connecting pipe is connected to the first mounting plate; one end of the second connecting pipe is connected to the second mounting plate; the two ends of the bent pipe are connected to the other end of the first connecting pipe and the other end of the second connecting pipe respectively. According to the safety valve supporting frame, the counter-acting force of starting and jumping of the safety valve can be resisted, and the impact force on a high-pressure and low-temperature pipeline is weakened. When a high-pressure low-temperature pipeline expands with heat and contracts with cold, the flexible compensation effect is achieved, and pipeline stress concentration is avoided.

Description

Technical Field

[0001] This application relates to the field of new fuel supply technology, and more specifically to a safety valve support frame. Background Technology

[0002] With the increasing global demand for clean energy and increasingly stringent environmental regulations, the application of liquefied natural gas (LNG) as ship fuel and cargo transport is rapidly expanding. As technology advances and regulations become more comprehensive, the market share of high-pressure LNG vessels will continue to grow. The application of high-pressure LNG technology in the marine sector, especially in LNG-powered ships and LNG carriers, demonstrates significant technological, environmental, and economic advantages. In high-pressure LNG systems, the safety valve is a core component ensuring system safety. The pressure of the medium transported in the system pipeline can reach as high as 350 bar. If the safety valve releases pressure beyond its limit, the resulting strong reaction force could damage the branch pipe at the bottom of the safety valve. Therefore, it is essential to install a support frame at the bottom of the safety valve to withstand the impact force. The temperature of the medium in the high-pressure LNG system pipeline can reach as low as -162°C. Traditional rigid support structures cannot provide flexible compensation during thermal expansion and contraction of the pipeline, leading to stress concentration and overload in the branch pipe at the bottom of the safety valve. Therefore, research on the design optimization of the support for safety valves in high-pressure cryogenic pipelines is of great significance.

[0003] Therefore, a safety valve support bracket is needed to at least partially solve the above problems. Summary of the Invention

[0004] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, this application provides a safety valve support frame for supporting a safety valve on a high-pressure cryogenic pipeline of a ship. The high-pressure cryogenic pipeline includes a main pipeline and branch pipelines communicating with the main pipeline. The safety valve is connected to and communicates with the branch pipeline via a branch pipeline flange. The safety valve support frame is characterized in that it is made of metal, and the safety valve support frame comprises: A first mounting plate is used to connect to the branch flange; A second mounting plate is used to connect to the main pipeline; A first connecting pipe, one end of which is connected to the first mounting plate; A second connecting pipe, one end of which is connected to the second mounting plate; and A bend, the two ends of which are respectively connected to the other end of the first connecting pipe and the other end of the second connecting pipe.

[0006] According to the safety valve support frame of this application, the safety valve support frame is rigidly connected to the main pipeline and branch flanges, which can support the safety valve and resist the reaction force of the safety valve opening, thereby reducing the impact force on the high-pressure cryogenic pipeline. During thermal expansion and contraction of the high-pressure cryogenic pipeline, the first mounting plate, second mounting plate, first connecting pipe, and second connecting pipe undergo slight bending or rotation due to metal elasticity, which can convert the linear expansion of the high-pressure cryogenic pipeline into angular displacement, playing a flexible compensation role and avoiding stress concentration in the high-pressure cryogenic pipeline. Furthermore, the safety valve support frame has a simple structure, good stability, is easy to implement, and convenient to maintain, effectively ensuring the operational safety of the high-pressure cryogenic pipeline. It has strong applicability and can be widely used on ships.

[0007] Optionally, the first mounting plate is perpendicular to the second mounting plate.

[0008] Optionally, both the first connecting pipe and the second connecting pipe are straight pipes, and the first connecting pipe is perpendicular to the second connecting pipe.

[0009] Optionally, the relationship between the distance L1 between the end of the first connecting pipe away from the bend and the center of the second connecting pipe and the distance L2 between the end of the second connecting pipe away from the bend and the center of the first connecting pipe satisfies: 0.8≤L1 / L2≤1.

[0010] Optionally, the centerline of the first connecting pipe is parallel to the center plane of the first mounting plate, and the centerline of the second connecting pipe is parallel to the center plane of the second mounting plate.

[0011] Optionally, the centerline of the second connecting pipe coincides with the center plane of the second mounting plate.

[0012] Optionally, the bend is a 90° elbow, and the relationship between the bending radius R and the nominal diameter D of the bend satisfies 1≤R / D≤3.

[0013] Optionally, the wall thickness of the first connecting pipe, the second connecting pipe, and the bend is equal, and the diameter of the first connecting pipe, the second connecting pipe, and the bend is equal.

[0014] Optionally, the wall thickness of the first mounting plate and the second mounting plate are equal, and the wall thickness of the first mounting plate and the second mounting plate is greater than the wall thickness of the first connecting pipe and the second connecting pipe.

[0015] Optionally, the relationship between the wall thickness T1 of the first mounting plate and the second mounting plate and the wall thickness T2 of the first connecting pipe and the second connecting pipe satisfies: 1.2≤T1 / T2≤1.5. Attached Figure Description

[0016] The following drawings, which are incorporated herein by reference and used to understand this application, illustrate embodiments of the application and their descriptions, thereby explaining the principles of the application.

[0017] In the attached image: Figure 1 A perspective view of a safety valve support frame applied to a high-pressure cryogenic pipeline according to a preferred embodiment of this application; and Figure 2 for Figure 1 A side view of the safety valve support frame.

[0018] Explanation of reference numerals in the attached figures: 10: Safety valve 20: Supervisor Road 30: Branch pipe 40: Branch flange 110: First mounting plate 120: Second mounting plate 130: First connecting pipe 140: Second connecting pipe 150: Bend L1: The distance between the end of the first connecting pipe furthest from the bend and the center of the second connecting pipe. L2: The distance between the end of the second connecting pipe furthest from the bend and the center of the first connecting pipe. R: Bending radius of the bend T1: Wall thickness of the first mounting plate T2: Wall thickness of the second mounting plate Detailed Implementation

[0019] The following description provides numerous specific details to offer a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with this application.

[0020] To fully understand this application, a detailed description will be provided below. It is obvious that the implementation of embodiments of this application is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this application are described in detail below; however, other embodiments may also be available in addition to these detailed descriptions.

[0021] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0022] In understanding the scope of this application, the term "comprising" and its derivatives, as used herein, are intended to be open-ended terms that specify the presence of a described feature, element, component, group, whole, and / or step, but do not exclude the presence of other undescribed features, elements, components, groups, wholes, and / or steps. This concept also applies to words with similar meanings, such as the terms "comprising," "having," and their derivatives.

[0023] The term "attached" or "joined" as used herein includes: a construction in which one element is directly fixed to another element by fixing it directly to another element; a construction in which one element is indirectly fixed to another element by fixing it to an intermediate member, which in turn is fixed to another element; and a construction in which one element is integral with another element, that is, one element is substantially part of another element. This definition also applies to words with similar meanings, such as "connect," "joint," "couple," "install," "adhere," "fix," and their derivatives. Finally, degree terms such as "substantially," "approximately," and "approximately" as used herein indicate the amount of deviation from which modifications to the terminology do not significantly alter the final result.

[0024] Ordinal numbers such as “first” and “second” used in this application are merely identifiers and have no other meaning, such as a specific order. Moreover, for example, the term “first component” does not imply the existence of a “second component”, and the term “second component” does not imply the existence of a “first component”.

[0025] It should be noted that the terms “up,” “down,” “front,” “back,” “left,” “right,” “inner,” “outer,” and similar expressions used in this article are for illustrative purposes only and are not intended to be restrictive.

[0026] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0027] Unless otherwise stated, the numerical ranges in this document include not only the entire range within its two endpoints, but also the subranges contained therein.

[0028] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0029] This application provides a safety valve support frame for supporting a safety valve 10 on a ship's high-pressure cryogenic pipeline. For example... Figure 1 and Figure 2 As shown, the high-pressure cryogenic pipeline includes a main pipeline 20 and a branch pipeline 30 connected to the main pipeline 20. The branch pipeline 30 is perpendicular to the main pipeline 20, and the diameter of the branch pipeline 30 is smaller than the diameter of the main pipeline 20. The safety valve 10 is connected to the branch pipeline 30 via a branch flange 40.

[0030] In this application, the material constituting the safety valve support frame is metal. Preferably, the material constituting the safety valve support frame is the same as the material used to construct the high-temperature, low-pressure pipeline, specifically the same as the material constituting the main pipeline 20 and the branch pipeline 30. This simplifies the welding process, reduces residual stress, and ensures a match between weld performance and strength. Since high-temperature, low-pressure pipelines are typically made of stainless steel, it is further preferred that the material constituting the safety valve support frame is stainless steel. Therefore, the safety valve support frame has low-temperature resistance and corrosion resistance, effectively preventing corrosion caused by dripping low-temperature liquids, facilitating subsequent pipeline maintenance, and its durability and low maintenance make it ideal for use in marine cryogenic pipelines.

[0031] like Figure 1 and Figure 2 As shown, the safety valve support frame includes a first mounting plate 110, a second mounting plate 120, a first connecting pipe 130, a second connecting pipe 140, and a bend 150. The first mounting plate 110 is used to connect to the branch flange 40. The second mounting plate 120 is used to connect to the main pipeline 20. One end of the first connecting pipe 130 is connected to the first mounting plate 110. One end of the second connecting pipe 140 is connected to the second mounting plate 120. The two ends of the bend 150 are respectively connected to the other ends of the first connecting pipe 130 and the second connecting pipe 140.

[0032] According to the safety valve support frame of this application, the safety valve support frame is rigidly connected to the main pipeline 20 and the branch flange 40, which can support the safety valve 10 and resist the reaction force of the safety valve 10 opening, thereby reducing the impact force on the high-pressure cryogenic pipeline. During thermal expansion and contraction of the high-pressure cryogenic pipeline, the first mounting plate 110, the second mounting plate 120, the first connecting pipe 130, and the second connecting pipe 140 undergo slight bending or rotation due to metal elasticity, which can convert the linear expansion of the high-pressure cryogenic pipeline into angular displacement, playing a flexible compensation role and avoiding stress concentration in the high-pressure cryogenic pipeline. Furthermore, the safety valve support frame has a simple structure, good stability, is easy to implement, and convenient to maintain, effectively ensuring the operational safety of the high-pressure cryogenic pipeline. It has strong applicability and can be widely used on ships.

[0033] Specifically, both the first mounting plate 110 and the second mounting plate 120 are constructed as flat plates. Preferably, the first mounting plate 110 is perpendicular to the second mounting plate 120. The first mounting plate 110 is used to closely abut the lower surface of the branch flange 40, and the first mounting plate 110 and the branch flange 40 can be fixedly connected by fasteners to ensure relative fixation between them. The second mounting plate 120 can be welded to the main pipeline 20 attached to the safety valve 10. Preferably, the wall thickness of the first mounting plate 110 and the second mounting plate 120 is equal. The first mounting plate 110 is perpendicular to the extension direction of the main pipeline 20, and the second mounting plate 120 is perpendicular to the extension direction of the branch pipeline 30.

[0034] In a preferred embodiment of this application, the first connecting pipe 130 and the second connecting pipe 140 are both seamless straight pipes, and the bend 150 is a 90° elbow. The diameters (e.g., nominal diameters) of the first connecting pipe 130, the second connecting pipe 140, and the bend 150 are equal. Preferably, the diameters of the first connecting pipe 130, the second connecting pipe 140, and the bend 150 are larger than the diameter of the branch pipe 30 and smaller than the diameter of the main pipe 20. Preferably, the wall thicknesses of the first connecting pipe 130, the second connecting pipe 140, and the bend 150 are equal to the wall thickness of the branch pipe 30.

[0035] One end of the first connecting pipe 130 is welded to the first mounting plate 110, and the other end of the first connecting pipe 130 is butt-welded to a bend 150 of the same diameter in a horizontal direction. One end of the second connecting pipe 140 is welded to the second mounting plate 120, and the other end of the second connecting pipe 140 is butt-welded to a bend 150 of the same diameter in a vertical direction. Preferably, the centerline of the first connecting pipe 130 is parallel to the center plane of the first mounting plate 110, and the centerline of the second connecting pipe 140 is parallel to the center plane of the second mounting plate 120. That is, the first connecting pipe 130 is perpendicular to the second connecting pipe 140. More preferably, the centerline of the first connecting pipe 130 coincides with the center plane of the first mounting plate 110, and the centerline of the second connecting pipe 140 coincides with the center plane of the second mounting plate 120.

[0036] In this application, the lengths of the first connecting pipe 130, the second connecting pipe 140, the first mounting plate 110, and the second mounting plate 120 can be calculated based on the calculation method for the natural compensation arm length of the pipe plane, combined with the outer diameter dimensions of the first connecting pipe 130 and the second connecting pipe 140. Finally, strength and stress analysis software can be used to simulate various working conditions, verify the calculation results, and ultimately determine suitable dimensions. Figure 2 As shown, preferably, the relationship between the distance L1 between the end of the first connecting pipe 130 away from the bend 150 and the center of the second connecting pipe 140, and the distance L2 between the end of the second connecting pipe 140 away from the bend 150 and the center of the first connecting pipe 130, satisfies the following condition: 0.8 ≤ L1 / L2 ≤ 1. For example, L1 / L2 can be 0.8, 0.85, 0.9, 0.95, 1, or other suitable values.

[0037] Preferably, the relationship between the bending radius R and the nominal diameter D of the bend 150 satisfies 1 ≤ R / D ≤ 3. For example, R / D can be 1, 1.5, 2, 2.5, 3, or other suitable values. More preferably, the relationship between the bending radius R and the nominal diameter D of the bend 150 satisfies R / D = 1.5.

[0038] To ensure that the load-bearing capacity of the cross-sections of the first mounting plate 110 and the second mounting plate 120 is not lower than that of the cross-sections of the first connecting pipe 130 and the second connecting pipe 140, and to avoid deformation or incomplete penetration due to heat imbalance during welding, the wall thickness of the first mounting plate 110 and the second mounting plate 120 is preferably greater than the wall thickness of the first connecting pipe 130 and the second connecting pipe 140. More preferably, the relationship between the wall thickness T1 of the first mounting plate 110 and the second mounting plate 120 and the wall thickness T2 (not shown) of the first connecting pipe 130 and the second connecting pipe 140 satisfies: 1.2 ≤ T1 / T2 ≤ 1.5. For example, T1 / T2 can be 1.1, 1.2, 1.3, 1.4, 1.5, or other suitable values. In practical applications, the wall thickness of the first mounting plate 110 and the second mounting plate 120 is not greater than the wall thickness of the main pipeline 20. When the wall thickness of the main pipeline 20 is thin, the wall thickness of the first mounting plate 110 and the second mounting plate 120 does not exceed 30% of the wall thickness of the main pipeline 20.

[0039] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application.

[0040] The features described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless the feature is not applicable in that other embodiment or otherwise stated.

[0041] This application has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the described embodiments. Furthermore, those skilled in the art will understand that this application is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this application, all of which fall within the scope of protection claimed in this application.

Claims

1. A safety valve support frame for supporting a safety valve on a high-pressure cryogenic pipeline of a ship, the high-pressure cryogenic pipeline comprising a main pipeline and branch pipelines communicating with the main pipeline, the safety valve being connected to and communicating with the branch pipelines via branch pipeline flanges, characterized in that, The safety valve support frame is made of metal, and the safety valve support frame includes: A first mounting plate is used to connect to the branch flange; A second mounting plate is used to connect to the main pipeline; A first connecting pipe, one end of which is connected to the first mounting plate; A second connecting pipe, one end of which is connected to the second mounting plate; and A bend, the two ends of which are respectively connected to the other end of the first connecting pipe and the other end of the second connecting pipe.

2. The safety valve support frame according to claim 1, characterized in that, The first mounting plate is perpendicular to the second mounting plate.

3. The safety valve support frame according to claim 2, characterized in that, Both the first connecting pipe and the second connecting pipe are straight pipes, and the first connecting pipe is perpendicular to the second connecting pipe.

4. The safety valve support frame according to claim 3, characterized in that, The relationship between the distance L1 between the end of the first connecting pipe away from the bend and the center of the second connecting pipe and the distance L2 between the end of the second connecting pipe away from the bend and the center of the first connecting pipe satisfies: 0.8≤L1 / L2≤1.

5. The safety valve support frame according to claim 3, characterized in that, The centerline of the first connecting pipe is parallel to the center plane of the first mounting plate, and the centerline of the second connecting pipe is parallel to the center plane of the second mounting plate.

6. The safety valve support frame according to claim 3, characterized in that, The centerline of the second connecting pipe coincides with the center plane of the second mounting plate.

7. The safety valve support frame according to claim 1, characterized in that, The bend is a 90° elbow, and the relationship between the bending radius R and the nominal diameter D of the bend satisfies 1≤R / D≤3.

8. The safety valve support frame according to any one of claims 1 to 7, characterized in that, The first connecting pipe, the second connecting pipe, and the bend have the same wall thickness, and the first connecting pipe, the second connecting pipe, and the bend have the same diameter.

9. The safety valve support frame according to claim 8, characterized in that, The first mounting plate and the second mounting plate have the same wall thickness, and the wall thickness of the first mounting plate and the second mounting plate is greater than the wall thickness of the first connecting pipe and the second connecting pipe.

10. The safety valve support frame according to claim 9, characterized in that, The relationship between the wall thickness T1 of the first mounting plate and the second mounting plate and the wall thickness T2 of the first connecting pipe and the second connecting pipe satisfies: 1.2≤T1 / T2≤1.5.

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