Underground high-pressure gas storage with streamline structure

Abstract

The utility model provides an underground high-pressure gas storage with a streamline structure, which comprises a cylindrical section, transition sections are connected to the end parts of two sides of the cylindrical section, a closure section is connected to one end, far away from the cylindrical section, of each transition section, the cylindrical section is in streamline smooth transition towards the transition sections and the closure section, and the curvature is gradually changed from small to large. Any cross section of the transition section and any cross section of the closure section are round, the diameter of the cross section farther from the center of the cylindrical section is smaller until the end, farthest from the center of the cylindrical section, of the closure section is closed into a point O, the point O is located on the center line of the cylindrical section, and the transition section and the closure section are symmetrical about the center line of the cylindrical section. The surface curvature of the transition section and the closure section is controlled to adapt to different geological conditions and operation conditions, unfavorable geological conditions are avoided, meanwhile, uniform distribution of internal stress and deformation of surrounding rock is ensured, the phenomenon of high concentrated stress is avoided, and the bearing arch effect is effectively exerted; and safety and stability of construction and operation processes of the underground high-pressure gas storage are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure gas storage reservoirs, in particular to an underground high-pressure gas storage reservoir with a streamlined structure. Background Art

[0002] High-pressure gas storage is an important component of the new energy storage system. Traditional surface steel gas tanks are expensive, occupy a lot of land, and have high safety risks. Underground artificial chambers have low investment costs, low dependence on geological conditions, and can be flexibly applied to areas with rich wind and solar energy or high electricity demand. It is one of the future trends in the site selection and development of new energy storage business.

[0003] However, high-pressure gas storage, especially those that use underground artificial chambers as underground high-pressure gas storage, are large in scale and have high gas pressure. The inflation process will cause the temperature and pressure of the gas in the chamber to increase, while the deflation process will cause the temperature and pressure of the gas in the chamber to decrease. The periodic inflation and exhaust cycle process will cause the stability of the underground high-pressure gas storage to be frequently disturbed, and the changes in the temperature and pressure of the gas in the chamber will cause changes in the bearing capacity of the chamber. The stability of underground high-pressure gas storage under the action of high pressure and high temperature is a prominent problem. In addition, when the excavation area of ​​the underground artificial chamber is too large, unfavorable geological conditions that are not suitable for excavation may be encountered.

[0004] Traditional high-pressure gas storage reservoirs are mostly flat-bottom structures with uneven force, which are prone to stress concentration and lead to high-stress damage to the high-pressure gas storage reservoir. Once the high-pressure gas storage reservoir is damaged, it will cause gas leakage and failure of the energy storage system. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and provide an underground high-pressure gas storage with a streamlined structure, which can solve the problem that the traditional high-pressure gas storage is prone to high stress damage due to uneven force.

[0006] To this end, the utility model adopts the following technical solutions:

[0007] A streamlined underground high-pressure gas storage reservoir comprises a cylindrical section, both ends of the cylindrical section are connected with a gradient section, one end of the gradient section away from the cylindrical section is connected with a closing section, the cylindrical section smoothly transitions toward the gradient section and the closing section in a streamlined manner, and the curvature gradually changes from small to large, any cross-sections of the gradient section and the closing section are circular, and the diameter of the cross-section is smaller the farther from the center of the cylindrical section, until the two ends of the closing section, which are farthest from the center of the cylindrical section, are closed into a point O, the point O is located on the center line of the cylindrical section, and the gradient section and the closing section are symmetrical about the center line of the cylindrical section.

[0008] On the basis of adopting the above technical solutions, the present invention can also adopt the following further technical solutions, or use these further technical solutions in combination:

[0009] The cross-sectional diameter of any point on the cylindrical segment is set to D, the cross-sectional area at the intersection of the cylindrical segment and the gradient segment is set to a first cross-sectional area, the cross-sectional area at the intersection of the gradient segment and the closing segment is set to a second cross-sectional area, the diameter of the second cross-sectional area is set to D2, and the distance between the first cross-sectional area and the second cross-sectional area is set to L2, wherein D2=(0.4~0.5)D, and L2=(0.8~1.2)D.

[0010] The cross section at the intersection of the cylindrical section and the gradient section is set as a first cross section, and the gradient section is provided with a special cross section for determining a smooth transition curvature at a distance L1 from the first cross section, wherein L1 satisfies L1=(0.2~0.25)D, and the diameter of the special cross section is set to D1, D1=(0.75~0.8)D.

[0011] The cross section at the intersection of the gradual section and the closing section is set as a second cross section, and the distance between the point O and the second cross section is set as L3, where L3=(0.1~0.15)D.

[0012] Compared with the prior art, the utility model has the following advantages and beneficial effects: the underground high-pressure gas storage reservoir is divided into a cylindrical section, a gradient section and a closing section, and the cylindrical section is controlled to smoothly transition to the gradient section and the closing section in a streamlined manner until they close at point O, and the surface curvatures of the gradient section and the closing section are controlled to adapt to different geological conditions and operating conditions, avoid unfavorable geological conditions, and ensure that the internal stress and deformation of the surrounding rock around the underground high-pressure gas storage reservoir are uniformly distributed to avoid the occurrence of high concentrated stress, effectively exert the bearing arch effect of the underground high-pressure gas storage reservoir, and ensure the safety and stability of the construction and operation of the underground high-pressure gas storage reservoir. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 It is a schematic diagram of an embodiment of the connection method of the gas charging and discharging pipelines of the parallel horizontal high-pressure gas storage tanks of the present utility model. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred implementation scheme of the present invention is described below in conjunction with specific embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent elements with the same or similar functions. However, it should be understood that the accompanying drawings are only used for illustrative purposes and cannot be understood as limitations on the present invention. In order to better illustrate the present embodiment, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted, and the positional relationship described in the accompanying drawings is only used for illustrative purposes and cannot be understood as limitations on the present invention.

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0017] The utility model provides an underground high-pressure gas storage with a streamlined structure, comprising a cylindrical section 1, both side ends of the cylindrical section 1 are connected with a gradient section 2, one end of the gradient section 2 far from the cylindrical section 1 is connected with a closing section 3, the cylindrical section 1 is streamlined and smoothly transitioned toward the gradient section 2 and the closing section 3, and the curvature gradually changes from small to large, any cross-sections of the gradient section 2 and the closing section 3 are circular, and the diameter of the cross-section farther from the center of the cylindrical section 1 is smaller, until the end of the closing section 3 farthest from the center of the cylindrical section 1 is closed to a point O, the point O is located on the center line of the cylindrical section 1, and the gradient section 2 and the closing section 3 are symmetrical about the center line of the cylindrical section 1.

[0018] like Figure 1 As shown, the cross-sectional diameter of any point on the cylindrical segment 1 is set to D, the cross-sectional area at the intersection of the cylindrical segment 1 and the gradient segment 2 is set to the first cross-sectional area, the cross-sectional area at the intersection of the gradient segment 2 and the closing segment 3 is set to the second cross-sectional area, the diameter of the second cross-sectional area is set to D2, and the distance between the first cross-sectional area and the second cross-sectional area is set to L2, wherein D2=(0.4~0.5)D, L2=(0.8~1.2)D.

[0019] The cross section at the intersection of the cylindrical section 1 and the gradient section 2 is set as the first cross section, and the gradient section 2 is provided with a special cross section for determining the smooth transition curvature at a distance L1 from the first cross section, wherein L1 satisfies L1=(0.2~0.25)D, and the diameter of the special cross section is set to D1, D1=(0.75~0.8)D.

[0020] The cross section at the intersection of the gradual section 2 and the closing section 3 is set as the second cross section, and the distance between the point O and the second cross section is set as L3, where L3=(0.1~0.15)D.

[0021] Figure 1The high-pressure gas storage shown is a horizontal structure, and its vertical structure and the arrangement and combination of the horizontal and vertical structures are special embodiments of the utility model.

[0022] like Figure 2 As shown, the gas charging and discharging position of the streamlined underground high-pressure gas storage can be selected at the middle of the cylindrical section 1 or at point O of the closed section 3. Figure 2 A schematic diagram of the connection mode of the charging and discharging pipelines of a parallel horizontal high-line gas storage is given.

[0023] According to the description and drawings of the utility model, those skilled in the art can easily manufacture or use the streamlined structure underground high-pressure gas storage of the utility model, and can produce the positive effects recorded in the utility model.

[0024] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two mechanisms, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0025] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "inside", "horizontal", "end", "length", "outer end", "left", "right" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the mechanism or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. The terms "first" and "second" are also used only for the simplicity of description, and do not indicate or imply relative importance.

[0026] Furthermore, in practicing the claims of the present invention, those skilled in the art may understand and affect variations to the disclosed embodiments by studying the drawings, disclosure, and appended claims. In addition, in the claims and the specification, words such as "comprises", "comprising", etc. do not exclude other elements or steps, and non-plural nouns do not exclude their plural forms.

[0027] The above is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the present invention are covered by the scope of the claims of the present invention and will not be listed one by one here.

Claims

1. A streamlined underground high-pressure gas storage reservoir, characterized in that: The invention comprises a cylindrical section (1), the two end portions of the cylindrical section (1) are connected to a gradient section (2), the end of the gradient section (2) away from the cylindrical section (1) is connected to a closing section (3), the cylindrical section (1) smoothly transitions toward the gradient section (2) and the closing section (3) in a streamlined manner, and the curvature gradually changes from small to large, any cross-section of the gradient section (2) and the closing section (3) are circular, and the diameter of the cross-section decreases as the distance from the center of the cylindrical section (1) increases, until the ends of the closing section (3) farthest from the center of the cylindrical section (1) converge to a point O, the point O being located on the center line of the cylindrical section (1), and the gradient section (2) and the closing section (3) being symmetrical about the center line of the cylindrical section (1).

2. A streamlined underground high-pressure gas storage according to claim 1, characterized in that: The cross-sectional diameter of any point on the cylindrical section (1) is set as D, the cross-sectional area at the intersection of the cylindrical section (1) and the gradient section (2) is set as a first cross-sectional area, the cross-sectional area at the intersection of the gradient section (2) and the closing section (3) is set as a second cross-sectional area, the diameter of the second cross-sectional area is set as D2, the distance between the first cross-sectional area and the second cross-sectional area is set as L2, wherein D 2= (0.4~0.5)D, L2=0.8D~1.2D.

3. The streamlined underground high-pressure gas storage according to claim 1, characterized in that: The cross section at the intersection of the cylindrical section (1) and the gradient section (2) is set as a first cross section, and the gradient section (2) is provided with a special cross section for determining a smooth transition curvature at a distance L1 from the first cross section, wherein L1 satisfies L1=0.2D~0.25D, and the diameter of the special cross section is set as D1, wherein D1=0.75D~0.8D.

4. The streamlined underground high-pressure gas storage according to claim 1, characterized in that: The cross section at the intersection of the gradual section (2) and the closing section (3) is set as a second cross section, and the distance between the point O and the second cross section is set as L3, where L3=0.1D~0.15D.

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