Underground bag type gas storage well

Abstract

The utility model provides an underground bag type gas storage well. The underground bag type gas storage well comprises an air bag, a supporting structure and a pressure bearing structure. The air bag is made of a non-metal material and is used for storing air; at least part of the supporting structure is used for being buried in a to-be-installed pit hole, the outer side wall of the supporting structure abuts against the inner wall face of the to-be-installed pit hole, at least part of the air bag is arranged in the supporting structure, and a gap is formed between the air bag and the supporting structure; the pressure bearing structure is arranged between the air bag and the supporting structure and connected with the air bag and the supporting structure, so that the air bag and the supporting structure are connected firmly and bear the pressure from the to-be-installed pit hole, and the problems that in the prior art, under the condition of poor geological conditions, the storage efficiency of a gas storage well is low, and cost is high are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure vessels, in particular to an underground bag-type gas storage well. Background Art

[0002] At present, a gas storage well is a well-type tubular device placed vertically underground for storing compressed gas, mainly used for storing natural gas or hydrogen at gas stations. Gas storage wells in the prior art are all made of seamless steel pipes, high-strength steel, and threaded. Commonly used materials for preparing gas storage wells are N80-Q, TP80CQJ, and P110, most of which are 7in and 95 / 8in. The above materials all have high requirements for yield strength ratio, impact energy, fatigue resistance, and material grain size. In addition, the manufacture of gas storage wells also requires professional drilling equipment, which drills 50 to 250 meters underground, has corresponding requirements for drilling personnel and formations, and the overall manufacturing period of the equipment is long, there are many influencing factors, and the manufacturing cost is high.

[0003] However, current underground gas storage wells face several problems during manufacturing and use. First, their storage capacity is relatively small. For example, a 9-inch pipe (outer diameter 244.5mm) has one water volume for approximately every 25 meters, while a 7-inch pipe (outer diameter 177.8mm) has one water volume for approximately 50 meters. Based on an average well depth of 150m, a gas storage well can hold a maximum of 6 water volumes. Secondly, the well depth is too deep. The depth of a gas storage well is between 50 and 250 meters, which undoubtedly increases the difficulty and workload of underground drilling projects, prolongs the manufacturing cycle, and increases the number of connection points between wellbores, increasing the risk of leakage. In addition, it has high requirements for formation geology. The actual conditions of the formation have an important impact on the cementing quality and safety of the gas storage well. Poor geological conditions will lead to low installation quality and safety of the gas storage well. Utility Model Content

[0004] The main purpose of the utility model is to provide an underground bag-type gas storage well to solve the problems of low storage efficiency and high cost of gas storage wells in the prior art under poor geological conditions.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an underground bag-type gas storage well, including: an air bag, which is made of non-metallic material and is used to store gas; a support structure, at least a part of the support structure is used to be buried in a pit to be installed, the outer wall of the support structure abuts against the inner wall surface of the pit to be installed, at least a part of the air bag is arranged in the support structure, and there is a gap between the air bag and the support structure; a pressure-bearing structure, which is arranged between the air bag and the support structure and is respectively connected to the air bag and the support structure, so that the air bag and the support structure are tightly connected and withstand the pressure from the pit to be installed.

[0006] Furthermore, the airbag includes: a mounting frame; a first protective layer and a second protective layer, which are respectively arranged on opposite sides of the mounting frame, and the second protective layer is arranged toward the pressure-bearing structure and connected to the pressure-bearing structure.

[0007] Furthermore, the first protective layer and the second protective layer are both made of plastic material such as polyethylene or polypropylene.

[0008] Furthermore, the length of the airbag ranges from 10m to 30m.

[0009] Furthermore, the support structure is a cylindrical structure, and the support structure includes a plurality of support cylinder segments, and the plurality of support cylinder segments are connected in sequence along a direction toward the bottom of the pit to be installed.

[0010] Furthermore, the pressure-bearing structure includes: a fixed mesh layer; a first fixed layer and a second fixed layer, which are respectively arranged on opposite sides of the fixed mesh layer and respectively connected to the inner side wall of the support structure and the outer side wall of the airbag.

[0011] Furthermore, there are multiple fixed mesh layers, and the multiple fixed mesh layers are arranged at intervals along the direction from the support structure to the airbag. There are multiple groups of first fixed layers and second fixed layers, and the multiple groups of first fixed layers and second fixed layers are arranged one-to-one corresponding to the multiple fixed mesh layers; and / or the first fixed layer and the second fixed layer are cast with the fixed mesh layer as an integrated structure.

[0012] Furthermore, the exterior of the second protective layer is coated with an anti-corrosion material; and / or the exterior of the second protective layer is coated with a waterproof material.

[0013] Further, the length of the support structure in the direction toward the hole to be installed is greater than the length of the airbag; and / or, the bottom end surface of the airbag and the bottom surface of the hole to be installed are arranged parallel to each other.

[0014] Furthermore, the supporting structure is made of metal material; and / or the pressure-bearing structure is a reinforced concrete structure.

[0015] By applying the technical solution of the utility model, an underground bag-type gas storage well includes an airbag, a supporting structure and a pressure-bearing structure; the airbag is made of non-metallic material for storing gas; at least part of the supporting structure is used to be buried in a pit to be installed, the outer wall of the supporting structure abuts against the inner wall surface of the pit to be installed, at least part of the airbag is arranged in the supporting structure, and there is a gap between the airbag and the supporting structure; the pressure-bearing structure is arranged between the airbag and the supporting structure and is respectively connected to the airbag and the supporting structure, so that the airbag and the supporting structure are tightly connected and withstand the pressure from the pit to be installed. In this way, by burying the supporting structure in the pit to be installed, it is used to support the pit to be installed, and also plays the role of isolating the stratum soil, and then the airbag is set in the supporting structure, and the pressure-bearing structure is set between the airbag and the supporting structure, so that the airbag made of non-metallic material and the supporting structure are connected as a whole, thereby strengthening the overall structure of the airbag, effectively storing gas, and improving the storage efficiency of gas. The overall structure is simple, easy to manufacture and maintain, and the manufacturing cost is greatly reduced. It has low requirements on stratum geology and is suitable for various geological conditions, thereby solving the problems of low storage efficiency and high cost of gas storage wells in poor geological conditions in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 The overall structural schematic diagram of the underground bag-type gas storage well according to the embodiment of the utility model is shown;

[0018] Figure 2 Shows Figure 1 A half-section view of a gas storage well in FIG.

[0019] Figure 3 A structural schematic diagram of a pressure-bearing structure provided according to an embodiment of an underground bag-type gas storage well of the utility model is shown.

[0020] The above drawings include the following reference numerals:

[0021] 1. Hole to be installed; 10. Airbag; 20. Support structure; 21. Support cylinder section; 30. Pressure-bearing structure; 31. Fixed mesh layer; 32. First fixed layer; 33. Second fixed layer. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] In order to solve the problems of low installation quality and safety and high cost of gas storage wells in the prior art under poor geological conditions, the utility model provides an underground bladder-type gas storage well.

[0024] Please refer to Figures 1 to 3 As shown, applying the technical solution of the utility model, the underground bag-type gas storage well includes an airbag 10, a support structure 20 and a pressure-bearing structure 30; the airbag 10 is made of non-metallic material for storing gas; at least part of the support structure 20 is used to be buried in the pit 1 to be installed, the outer wall of the support structure 20 abuts against the inner wall surface of the pit 1 to be installed, at least part of the airbag 10 is arranged in the support structure 20, and there is a gap between the airbag 10 and the support structure 20; the pressure-bearing structure 30 is arranged between the airbag 10 and the support structure 20 and is respectively connected to the airbag 10 and the support structure 20, so that the airbag 10 and the support structure 20 are tightly connected and withstand the pressure from the pit 1 to be installed.

[0025] By applying the technical solution of this embodiment, a supporting structure 20 is buried in the pit 1 to be installed to support the pit 1 to be installed, and it also plays a role in isolating the stratum soil, and then the airbag 10 is arranged in the supporting structure 20, and the pressure-bearing structure 30 is arranged between the airbag 10 and the supporting structure 20, so that the airbag 10 made of non-metallic material is connected to the supporting structure 20 as a whole, thereby strengthening the overall structure of the airbag 10, effectively storing gas, and improving the storage efficiency of gas. The overall structure is simple, easy to manufacture and maintain, and the manufacturing cost is greatly reduced. It has low requirements on stratum geology and is suitable for various geological conditions, thereby solving the problems of low storage efficiency and high cost of gas storage wells in poor geological conditions in the prior art.

[0026] Specifically, the airbag 10 includes a mounting frame, a first protective layer, and a second protective layer; the first protective layer and the second protective layer are respectively arranged on opposite sides of the mounting frame, and the second protective layer is arranged toward the pressure-bearing structure 30 and connected to the pressure-bearing structure 30. In this way, the mounting frame is prepared using steel bars according to the shape and size specifications of the prefabricated airbag 10 to serve as a structural support for the airbag 10, thereby enhancing the strength and durability of the airbag 10. During the prefabrication process, we also need to conduct a series of tests and inspections on the airbag 10 to ensure that its quality and performance meet our requirements. These tests may include pressure tests, durability tests, safety tests, etc.

[0027] In this embodiment, the installation frame is a steel frame.

[0028] Specifically, the first protective layer and the second protective layer are both made of polyethylene or polypropylene plastic material. With the above arrangement, the plastic material has significant advantages such as corrosion resistance, light weight, wear resistance, low fluid flow resistance, long service life, and simple construction. In addition, the airbag 10 structure can be connected by welding, which significantly improves the anti-corrosion performance, reduces costs, and facilitates maintenance.

[0029] In this embodiment, the length of the airbag 10 ranges from 10m to 30m. In this way, the installation depth of the airbag 10 is low, and its requirements for stratum geology are low, and it is suitable for various geological conditions. In addition, the construction is relatively easy and the maintenance cost is low, thereby greatly improving the storage efficiency of the overall structure.

[0030] Specifically, the support structure 20 is a cylindrical structure, and the support structure 20 includes a plurality of support tube segments 21, and the plurality of support tube segments 21 are sequentially connected in a direction toward the bottom of the pit to be installed. In this way, the plurality of support tube segments 21 are tightly connected together to form a complete support structure 20, and the overall structure has sufficient strength and stability, and can also effectively isolate the stratum soil in the pit 1 to be installed, preventing the airbag 10 from being affected by the soil pressure.

[0031] like Figure 3 As shown, the pressure-bearing structure 30 includes a fixed mesh layer 31, a first fixed layer 32, and a second fixed layer 33. The first fixed layer 32 and the second fixed layer 33 are respectively arranged on opposite sides of the fixed mesh layer 31 and are respectively connected to the inner side wall of the support structure 20 and the outer side wall of the airbag 10. In this way, by arranging the fixed mesh layer 31 between the airbag 10 and the support structure 20 as a structural support, and then arranging the first fixed layer 32 and the second fixed layer 33 on both sides of the fixed mesh layer 31, the gap between the airbag 10 and the support structure 20 is filled, and the airbag 10 and the support structure 20 are connected as a whole, thereby strengthening the overall structure of the airbag 10.

[0032] In this embodiment, the metal mesh layer is a steel mesh layer.

[0033] Optionally, there are multiple fixed mesh layers 31, and the multiple fixed mesh layers 31 are arranged at intervals along the direction from the support structure 20 to the airbag 10. There are multiple groups of first fixed layers 32 and second fixed layers 33, and the multiple groups of first fixed layers 32 and second fixed layers 33 are arranged one-to-one corresponding to the multiple fixed mesh layers 31. In this way, according to the use requirements and application environment, the multiple fixed mesh layers 31 can be arranged at intervals between the airbag 10 and the support structure 20, and each group of first fixed layers 32 and second fixed layers 33 can be arranged on both sides of the corresponding fixed mesh layer 31, which further strengthens the overall structural strength and stability of the airbag 10.

[0034] Optionally, the first fixed layer 32 and the second fixed layer 33 are cast as an integral structure with the fixed mesh layer 31. In this way, after the rear fixed mesh is arranged, the first fixed layer 32 and the second fixed layer 33 are cast in the gap between the support structure 20 and the airbag 10, respectively, so that the first fixed layer 32 and the second fixed layer 33 are cast as an integral structure with the fixed mesh layer 31, thereby strengthening the strength of the overall structure.

[0035] In order to ensure the service life of the airbag 10, the second protective layer is coated with an anti-corrosion material. The above configuration forms a solid protective layer on the surface of the airbag 10 through a multi-layer anti-corrosion material coating process, which not only prevents the airbag 10 from corrosion, but also improves the durability of the airbag 10.

[0036] Optionally, the second protective layer is coated with a waterproof material on the outside, so that it can not only effectively prevent water penetration, but also withstand the impact of various adverse environmental conditions.

[0037] Specifically, the length of the support structure 20 in the direction toward the pit 1 to be installed is greater than the length of the airbag 10. In this way, after the first fixing layer 32 and the second fixing layer 33 of the pressure-bearing structure 30 are poured, cement is poured into the gap between the airbag 10 and the support structure 20, and the capping operation is performed after the cement is completely solidified, so that the airbag 10 is only wrapped in the pressure-bearing structure 30.

[0038] Specifically, the bottom end surface of the airbag 10 is arranged parallel to the bottom surface of the pit 1 to be installed. In this way, since any uneven structure may cause the anti-corrosion material coated on the outside of the airbag 10 to crack or peel off, thereby affecting the quality of the overall structure, professional construction teams usually use professional tools for fine processing, and even use some high-precision measuring instruments to ensure its flatness.

[0039] In this embodiment, the supporting structure 20 is made of metal material; the pressure-bearing structure 30 is a reinforced concrete structure.

[0040] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0041] The underground bag-type gas storage well includes an air bag, a supporting structure and a pressure-bearing structure; the air bag is made of non-metallic material for storing gas; at least part of the supporting structure is used to be buried in a pit to be installed, the outer wall of the supporting structure abuts against the inner wall surface of the pit to be installed, at least part of the air bag is arranged in the supporting structure, and there is a gap between the air bag and the supporting structure; the pressure-bearing structure is arranged between the air bag and the supporting structure and is respectively connected to the air bag and the supporting structure, so that the air bag and the supporting structure are tightly connected and withstand the pressure from the pit to be installed. In this way, by burying the supporting structure in the pit to be installed, it is used to support the pit to be installed, and also plays the role of isolating the stratum soil, and then the airbag is set in the supporting structure, and the pressure-bearing structure is set between the airbag and the supporting structure, so that the airbag made of non-metallic material and the supporting structure are connected as a whole, thereby strengthening the overall structure of the airbag, effectively storing gas, and improving the storage efficiency of gas. The overall structure is simple, easy to manufacture and maintain, and the manufacturing cost is greatly reduced. It has low requirements on stratum geology and is suitable for various geological conditions, thereby solving the problems of low storage efficiency and high cost of gas storage wells in poor geological conditions in the prior art.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0043] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0044] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0045] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0046] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An underground bag-type gas storage well, characterized in that: include: An airbag (10), wherein the airbag (10) is made of a non-metallic material and is used to store gas; A support structure (20), wherein at least a portion of the support structure (20) is used to be buried in a hole (1) to be installed, an outer wall of the support structure (20) abuts against an inner wall surface of the hole (1) to be installed, at least a portion of the airbag (10) is arranged in the support structure (20), and a gap is provided between the airbag (10) and the support structure (20); A pressure-bearing structure (30) is arranged between the airbag (10) and the support structure (20) and is respectively connected to the airbag (10) and the support structure (20), so that the airbag (10) and the support structure (20) are tightly connected and withstand the pressure from the pit (1) to be installed.

2. The underground bag-type gas storage well according to claim 1, characterized in that: The airbag (10) comprises: Install the skeleton; The first protective layer and the second protective layer are respectively arranged on opposite sides of the installation frame, and the second protective layer is arranged toward the pressure-bearing structure (30) and connected to the pressure-bearing structure (30).

3. The underground bag-type gas storage well according to claim 2, characterized in that: The first protective layer and the second protective layer are both made of plastic material such as polyethylene or polypropylene.

4. The underground bag-type gas storage well according to claim 1, characterized in that: The length of the airbag (10) ranges from 10m to 30m.

5. The underground bag-type gas storage well according to claim 1, characterized in that: The support structure (20) is a cylindrical structure, and comprises a plurality of support cylinder segments (21). The plurality of support cylinder segments (21) are connected in sequence along a direction toward the bottom of the pit to be installed.

6. The underground bag-type gas storage well according to claim 1, characterized in that: The pressure bearing structure (30) comprises: A fixed mesh layer (31); The first fixing layer (32) and the second fixing layer (33) are respectively arranged on opposite sides of the fixing mesh layer (31) and are respectively connected to the inner wall of the supporting structure (20) and the outer wall of the airbag (10).

7. The underground bag-type gas storage well according to claim 6, characterized in that: There are a plurality of fixed mesh layers (31), and the plurality of fixed mesh layers (31) are arranged at intervals along the direction from the support structure (20) to the airbag (10). The first fixing layer (32) and the second fixing layer (33) are multiple groups, and the multiple groups of the first fixing layer (32) and the The second fixed layer (33) is arranged in one-to-one correspondence with the plurality of fixed mesh layers (31); and / or, The first fixing layer (32) and the second fixing layer (33) are cast with the fixing mesh layer (31) to form an integrated structure.

8. The underground bag-type gas storage well according to claim 2, characterized in that: The exterior of the second protective layer is coated with an anti-corrosion material; and / or, The exterior of the second protective layer is coated with a waterproof material.

9. The underground bag-type gas storage well according to claim 1, characterized in that: The length of the support structure (20) in the direction toward the pit (1) to be installed is greater than the length of the airbag (10); and / or, The bottom end surface of the airbag (10) and the bottom surface of the hole (1) to be installed are arranged parallel to each other.

10. The underground bag-type gas storage well according to claim 1, characterized in that: The support structure (20) is made of metal material; and / or, The pressure-bearing structure (30) is a reinforced concrete structure.

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