Flow guiding and cooling device for gas injection pipeline in tunnel type gas storage and cooling method of flow guiding and cooling device

Abstract

The invention discloses a diversion cooling device for a gas injection pipeline in a tunnel-type gas storage and a cooling method thereof, the device is applied in the gas storage, changes of air distribution in the gas storage are completed, the top temperature in the gas storage is reduced, the inflation speed in the gas storage is increased, and the cooling efficiency is improved. The device comprises a manhole pipeline, a swing pipe, a top pipeline, a plurality of air outlets and a supporting mechanism, the method is suitable for the flow guiding and cooling device for the gas injection pipeline in the tunnel type gas storage. The gas inlet pipeline at the middle lower part of the gas storage is introduced to the top of the gas storage through the device, and the temperature field distribution in the gas storage is changed through the gas outlet hole at the top and the gas outlet at the tail end, so that the purpose of reducing the top temperature is achieved, and the gas charging speed of the gas storage is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of artificial chamber-type gas storage reservoirs, and particularly to a diversion and cooling device for an air injection pipeline in a tunnel-type gas storage reservoir and a cooling method thereof. Background Art

[0002] As a key energy storage facility, the artificial chamber-type gas storage reservoir for compressed air energy storage (CAES) is an underground gas storage space carefully constructed by artificially excavating underground rock masses. This type of gas storage reservoir is mainly divided into two typical categories in terms of structural form. One is the large tank-type gas storage reservoir, which usually has a relatively large single gas storage space and can achieve a relatively high gas storage capacity within a limited floor area; the other is the tunnel-type gas storage reservoir, which makes ingenious use of the underground space for gas storage by means of a long tunnel structure and can be flexibly arranged according to the terrain and geological conditions.

[0003] During the key process of inflating and pressurizing the compressed air energy storage gas storage reservoir, the air temperature inside the chamber will rise sharply. Further exploration reveals that the temperature rise inside the chamber is mainly affected by two extremely significant thermodynamic factors. On the one hand, the injected air is rapidly compressed inside the chamber. According to the principles of thermodynamics, a large amount of heat is generated during the gas compression process, and this part of the heat is continuously released into the chamber space, becoming an important heat source leading to the temperature rise. On the other hand, a part of the kinetic energy carried by the incident air interacts with the surrounding medium inside the chamber, and during this process, the kinetic energy gradually transforms into heat energy, further exacerbating the temperature rise inside the chamber.

[0004] As the inflating and pressurizing process of the gas storage reservoir progresses, the distribution of the gas temperature field inside the chamber shows an obvious non-uniform state. Since the density of hot air is relatively small and the density of cold air is relatively large, a convection phenomenon of hot air rising naturally and cold air descending naturally will occur. This convection causes a large amount of hot air to accumulate in the upper region of the gas storage reservoir, and its temperature is much higher than that of the lower region. When the temperature in the upper part of the gas storage reservoir climbs above a certain threshold, the high-temperature environment will have many adverse effects on the sealing structure of the gas storage reservoir. High temperature may cause changes in the physical properties of the sealing material, such as a decrease in elasticity and an increase in hardness, thereby weakening the sealing performance of the sealing structure. In extreme cases, it may directly lead to the destruction of the sealing structure, resulting in serious problems such as gas leakage in the gas storage reservoir.

[0005] During the pressurization process of the gas storage reservoir, to ensure the safe and stable operation of the gas storage reservoir, it is crucial to effectively control the gas temperature rise in the gas storage reservoir. The core purpose is to reduce the adverse effects of temperature on the sealing structure. In previous practices, traditional methods mostly adopted the strategy of intermittent gas injection to attempt to control the temperature rise. This method controls the rising amplitude of the temperature to a certain extent by pausing the gas injection periodically, allowing the heat in the chamber to transfer to the surrounding rock mass and dissipate a part of it. However, this method has obvious drawbacks. Due to frequent intermittent operations, it will inevitably cause a significant extension of the gas injection time. For an energy storage power station, the extension of the gas injection time means a reduction in the efficiency of the entire energy storage process, and it cannot efficiently convert excess electric energy into the potential energy of compressed air for storage, thereby affecting the overall operation efficiency and economic benefits of the energy storage power station in the power system. Therefore, under the current technological development requirements, it is urgent to develop a new method that can effectively change the temperature field distribution in the gas storage reservoir, break through the limitations of the traditional intermittent gas injection method, achieve the goal of improving the gas injection efficiency, ultimately effectively improve the operation efficiency of the energy storage power station, and better meet the urgent needs of the modern energy system for efficient energy storage technology. Summary of the Invention

[0006] The object of the present invention is to provide a gas injection pipeline diversion and temperature reduction device and its temperature reduction method in a tunnel-type gas storage reservoir to solve the above deficiencies in the prior art.

[0007] To achieve the above object, the present invention provides one of the following technical solutions: A gas injection pipeline diversion and temperature reduction device in a tunnel-type gas storage reservoir. This device is applied in the gas storage reservoir 1 to complete the change of the air distribution inside the gas storage reservoir 1, achieve the reduction of the temperature at the top inside the gas storage reservoir 1, and improve the gas injection speed inside the gas storage reservoir 1. The device includes:

[0008] A manhole pipeline 2, which is installed on the sealed end of the gas storage reservoir 1;

[0009] A swing pipeline 3, which is used to compensate for displacement and buffer pressure through its own swing and deformation when the gas storage reservoir 1 is affected by geological condition changes, temperature changes, and gas pressure fluctuations during operation, so as to avoid damage to the manhole pipeline 2 due to stress concentration; the swing pipeline 3 is located inside the gas storage reservoir 1, and one end of it is rotatably connected to one end of the manhole pipeline 2;

[0010] A top pipeline 4, which is located inside the gas storage reservoir 1; one end of the top pipeline 4 is connected to the other end of the swing pipeline 3, and the other end is located at the bottom away from the sealed end of the gas storage reservoir 1;

[0011] Multiple air outlet holes 5, which are sequentially opened on the transverse pipeline of the top pipeline 4 along the length direction of the transverse pipeline of the top pipeline 4;

[0012] The support mechanism 6 is fixedly installed in the gas storage reservoir 1; the support mechanism 6 is used to support the horizontal pipeline of the top pipeline 4 at the top inside the gas storage reservoir 1;

[0013] Among them, the apertures of the multiple air outlet holes 5 opened starting from one end of the manhole pipeline 2 gradually increase in sequence, which is used to improve the axial uniformity of the temperature in the gas storage reservoir 1.

[0014] As a preferred embodiment of the present invention, one end of the swing pipe 3 is connected to one end of the manhole pipeline 2 through a rotating mechanism 7. When the swing pipe 3 realizes its own swing and deformation through the rotating mechanism 7 with one end of the manhole pipeline 2, the protection of the top pipeline 4 and the protection of the sealing performance and stability of the gas storage reservoir 1 are completed.

[0015] As a preferred embodiment of the present invention, the rotating mechanism 7 includes:

[0016] The rotating groove 701 is opened on the outer surface of the manhole pipeline 2;

[0017] The rotating slider 702 is fixedly installed on the end face of the swing pipe 3 close to the manhole pipeline 2;

[0018] Among them, the rotating slider 702 is embedded in the rotating groove 701;

[0019] When the swing pipe 3 is affected by geological condition changes, temperature changes and gas pressure fluctuations, the swing pipe 3 realizes its own swing and deformation through the sliding of the rotating slider 702 in the rotating groove 701.

[0020] As a preferred embodiment of the present invention, the support mechanism 6 includes:

[0021] At least one arc-shaped bracket 601, the bottom arc-shaped frame of which is installed on the bottom arc-shaped surface of the gas storage reservoir 1 by welding;

[0022] At least one support ring 602, which is located at the top end of the arc-shaped bracket 601;

[0023] A plurality of cross beams 603, which are used for connecting each arc-shaped bracket 601 to increase the stability of the support mechanism 6;

[0024] Among them, each support ring 602 is sleeved on the horizontal pipeline of the top pipeline 4.

[0025] As a preferred embodiment of the present invention, the pipe body of one end of the swing pipe 3 close to the manhole pipeline 2 is a reducing pipe;

[0026] The end face diameter of the pipe body of one end of the swing pipe 3 close to the manhole pipeline 2 is the same as the diameter of the manhole pipeline 2;

[0027] The end face diameter of the pipe body of the swing pipe 3 connected to one end of the top pipe 4 is the same as the diameter of the top pipe 4.

[0028] Another technical solution provided by the present invention is as follows: a temperature reduction method, which is applicable to the gas injection pipeline diversion and temperature reduction device in the above-mentioned tunnel-type gas storage reservoir. The method includes:

[0029] S1. External air enters the gas storage reservoir 1 through the manhole pipe 2. When the air reaches the air inlet of the gas storage reservoir 1, its temperature is relatively low. It passes through the swing pipe 3 and reaches the top pipe 4, and blows cold air into the upper part of the gas storage reservoir 1 through the air outlet holes 5 on the lower side of the top pipe 4, reducing the temperature of the upper part of the gas storage reservoir 1.

[0030] S2. Through the gradually increasing air outlet holes 5 at the lower part of the top pipe 4, the uniformity of the temperature along the axial direction of the gas storage reservoir 1 is improved.

[0031] S3. When the cold air passes through the top pipe 4, heat exchange occurs with the outside of the top pipe 4, bringing the heat of the upper part of the gas storage reservoir 1 to the lower part of the gas storage reservoir 1, promoting the heat exchange between the upper and lower parts of the gas storage reservoir 1 to reduce the temperature of the upper part of the gas storage reservoir.

[0032] In the above technical solution, for the gas injection pipeline diversion and temperature reduction device and its temperature reduction method in the tunnel-type gas storage reservoir provided by the present invention, the device is provided with gradually increasing air outlet holes and an air outlet is equipped at the tail end of the pipeline. When the gas is transported from the middle and lower parts of the gas storage reservoir to the top along the transformed pipeline, a part of the gas is first discharged orderly through the air outlet holes at the top. These air outlet holes are not randomly set, aiming to ensure that the discharged gas can be evenly and efficiently diffused to every space at the top. As the low-temperature gas diffuses, it quickly mixes with the original high-temperature gas at the top. In this process, according to the principle of heat transfer, the heat of the high-temperature gas is absorbed and carried away by the low-temperature gas, and the temperature of the top area is effectively reduced. At the same time, another part of the gas is discharged through the air outlet at the tail end of the pipeline, which plays a key role in promoting the gas circulation inside the gas storage reservoir. The existence of the air outlet at the tail end promotes a stronger circulating flow of the gas inside the reservoir, enabling the gas in different temperature regions to be fully mixed, further optimizing the temperature field distribution, and effectively avoiding the continuous existence and expansion of local high-temperature regions.

[0033] At high temperatures, gas molecules move extremely actively, the repulsive force between molecules increases, and the newly injected gas faces strong resistance when entering the gas storage reservoir, resulting in a slow and difficult gas filling process. However, as the temperature at the top decreases, the activity of gas molecules returns to the normal level, the molecular spacing becomes stable, and the newly injected gas can fill into all corners of the gas storage reservoir more smoothly, significantly improving the gas filling speed. This not only significantly improves the working efficiency of the gas storage reservoir, greatly shortens the time required for a single gas filling, reduces energy consumption, but also, due to the improvement of the temperature environment, reduces the operating burden on the gas storage reservoir equipment, extends the service life of the equipment to a certain extent, reduces the equipment maintenance cost and frequency, and provides strong support for the efficient, stable and economic operation of the tunnel-type gas storage reservoir. Brief Description of the Drawings

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0035] Figure 1 It is a schematic structural diagram of the gas injection pipeline diversion and cooling device in the tunnel-type gas storage reservoir of the present invention.

[0036] Figure 2 It is a schematic structural diagram inside the gas injection pipeline diversion and cooling device in the tunnel-type gas storage reservoir of the present invention.

[0037] Figure 3 It is a schematic structural diagram of the swing pipe of the gas injection pipeline diversion and cooling device in the tunnel-type gas storage reservoir of the present invention.

[0038] Figure 4 It is a schematic structural diagram of the manhole pipeline of the gas injection pipeline diversion and cooling device in the tunnel-type gas storage reservoir of the present invention.

[0039] Figure 5 It is a bottom view of the top pipeline of the gas injection pipeline diversion and cooling device in the tunnel-type gas storage reservoir of the present invention.

[0040] Description of the Reference Numerals:

[0041] 1. Gas storage reservoir; 2. Manhole pipeline; 3. Swing pipe; 4. Top pipeline; 5. Air outlet hole; 6. Support frame; 601. Arc-shaped support; 602. Support ring; 603. Cross beam; 7. Rotating mechanism; 701. Rotating groove; 702. Rotating slider. Detailed Embodiments

[0042] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will further introduce the present invention in detail in conjunction with the drawings.

[0043] Example 1

[0044] As Figures 1-5 shown, the gas injection pipeline diversion and cooling device in the tunnel-type gas storage reservoir is applied in the gas storage reservoir 1 to change the air distribution inside the gas storage reservoir 1, realize the reduction of the temperature at the top inside the gas storage reservoir 1, and improve the gas filling speed inside the gas storage reservoir 1. The device includes:

[0045] The manhole pipeline 2 is installed on the sealed end of the gas storage reservoir 1;

[0046] Specifically, the manhole pipeline 2 is tightly and firmly connected to the sealed end by the construction team using advanced installation techniques, ensuring that the sealing performance at the connection reaches an extremely high standard to guarantee that during the subsequent operation of the gas storage reservoir 1, gas will not leak from the connection between the manhole pipeline 2 and the sealed end, thus playing a key role in the daily operation and maintenance and emergency operations of the manhole pipeline 2 in the gas storage reservoir 1.

[0047] The device further includes a swing pipe 3, which is used to compensate for displacement and buffer pressure through its own swing and deformation when the gas storage reservoir 1 is affected by geological condition changes, temperature changes, and gas pressure fluctuations during operation, avoiding damage to the manhole pipeline 2 due to stress concentration; the swing pipe 3 is located inside the gas storage reservoir 1, and one end of it is rotatably connected to one end of the manhole pipeline 2;

[0048] Furthermore, one end of the swing pipe 3 is connected to one end of the manhole pipeline 2 through a rotating mechanism 7. When the swing pipe 3 swings and deforms itself through the rotating mechanism 7 and the manhole pipeline 2, it completes the protection of the top pipeline 4 and the protection of the sealing performance and stability of the gas storage reservoir 1.

[0049] Furthermore, the rotating mechanism 7 includes:

[0050] A rotating groove 701 is opened on the outer surface of the manhole pipeline 2;

[0051] A rotating slider 702 is fixedly installed on the end face of the swing pipe 3 close to the manhole pipeline 2;

[0052] Wherein, the rotating slider 702 is embedded in the rotating groove 701;

[0053] When the swing pipe 3 is affected by geological condition changes, temperature changes, and gas pressure fluctuations, the swing pipe 3 realizes its own swing and deformation through the sliding of the rotating slider 702 in the rotating groove 701.

[0054] Specifically, when geological conditions change, such as ground subsidence or slight crustal displacement, the overall structure of the gas storage reservoir 1 will shift accordingly. Upon sensing this change, the oscillating tube 3 quickly begins to slide its sliding block 702 within the rotating groove 701. Due to the unique curvature and guiding design of the rotating groove 701, the sliding of the sliding block 702 drives the oscillating tube 3 to achieve precise angular adjustment and moderate bending deformation, thereby cleverly compensating for the effects of structural displacement and effectively preventing stress concentration from pulling and damaging the top pipe 4.

[0055] When faced with temperature changes, the gas in the gas storage reservoir 1 expands when heated or contracts when cooled, which causes pressure fluctuations in the pipeline system. The swinging tube 3 once again plays a key role. The rotating slider 702 slides flexibly in the rotating groove 701 under the thermal expansion and contraction forces caused by temperature. When the gas expands when heated and the pressure increases, the rotating slider 702 will slide in a specific direction along the rotating groove 701, causing the swinging tube 3 to expand and deform appropriately, buffering excessive pressure; conversely, when the temperature drops, the gas contracts, and the pressure drops, the rotating slider 702 will slide in the opposite direction, causing the swinging tube 3 to restore part of its shape and maintain relative stability of the pressure in the pipeline system. This process effectively protects the top pipe 4 from damage caused by pressure shocks caused by temperature changes.

[0056] In the event of more drastic gas pressure fluctuations, whether due to high-pressure shocks or low-pressure changes, the rotating slider 702 can slide quickly and stably within the rotating groove 701, driven by pressure, allowing the oscillating tube 3 to swing and deform accordingly in a timely manner. In this way, the oscillating tube 3 not only successfully buffers the impact of pressure fluctuations on the top pipe 4, but also ensures the sealing of the gas storage reservoir 1. Because the deformation of the oscillating tube 3 is always within a controllable range, and its connection points with the surrounding pipes and the gas storage wall are rationally designed, it can maintain a tight fit during the deformation process, thereby preventing the risk of gas leakage and maintaining the sealing and stability of the gas storage reservoir 1.

[0057] By rotating the slider 702 in the rotating groove 701, the swing tube 3 can continuously and reliably provide all-round protection to the top pipeline 4 under complex and changing working conditions, while ensuring the sealing and stability of the gas storage reservoir 1.

[0058] Furthermore, the pipe body of the swing pipe 3 close to one end of the manhole pipe 2 is a reducer;

[0059] The end diameter of the swing pipe 3 near one end of the manhole pipe 2 is the same as the diameter of the manhole pipe 2;

[0060] The end diameter of the pipe body of the swing pipe 3 connected to one end of the top pipe 4 is the same as the diameter of the top pipe 4.

[0061] Specifically, to ensure stable operation under complex working conditions, the pipe end diameter of the pipe body near one end of the manhole pipe 2 is accurately measured and calculated, and is precisely set to be exactly the same as the diameter of the manhole pipe 2. This can effectively avoid sudden changes in gas flow velocity and pressure loss caused by diameter differences, ensure the smooth transition of gas between pipes, and greatly improve the operating efficiency of the entire pipeline system.

[0062] The pipe end diameter of the pipe body where the swing pipe 3 is connected to one end of the top pipe 4 is also customized according to the diameter of the top pipe 4. During the manufacturing process, it is ensured that the pipe end diameter is consistent with the diameter of the top pipe 4. When the swing pipe 3 is connected to the top pipe 4, smooth gas flow can be achieved, reducing the turbulent flow phenomenon caused by diameter mismatch, reducing the operating resistance of the pipeline system, and thus improving the stability and reliability of the entire gas storage system.

[0063] The device further includes a top pipe 4, which is located inside the gas storage 1; one end of the top pipe 4 is connected to the other end of the swing pipe 3, and the other end is located at the bottom away from the sealed end of the gas storage 1;

[0064] The device further includes a plurality of air outlet holes 5, which are sequentially opened on the transverse pipe of the top pipe 4 along the length direction of the transverse pipe of the top pipe 4;

[0065] Among them, the diameters of the plurality of air outlet holes 5 starting from one end of the manhole pipe 2 gradually increase in sequence, which is used to improve the axial uniformity of temperature in the gas storage 1.

[0066] Specifically, during the operation of the gas storage, the flow of gas in the storage will cause uneven temperature distribution, especially along the axial direction of the gas storage 1, and the temperature difference is relatively obvious. The air outlet holes 5 with smaller diameters are close to one end of the manhole pipe 2, which can initially regulate the outflow velocity and flow rate of the gas. As the gas flows horizontally along the top pipe 4, the subsequent air outlet holes 5 with gradually increasing diameters will adjust the gas escape amount according to parameters such as gas pressure, temperature, and flow velocity. The gas in the high-temperature area can escape faster through the air outlet holes 5 with larger diameters and mix with the surrounding gas, while the low-temperature area maintains relatively stable gas exchange through the air outlet holes 5 with smaller diameters, thereby achieving the improvement of the axial uniformity of temperature in the gas storage 1, ensuring a more balanced temperature environment in each area of the gas storage, and providing a strong guarantee for the efficient and stable operation of the gas storage.

[0067] The device further includes a support mechanism 6, which is fixedly installed inside the gas storage 1; the support mechanism 6 is used to support the transverse pipe of the top pipe 4 at the top inside the gas storage 1;

[0068] Furthermore, the support mechanism 6 includes:

[0069] At least one arc-shaped bracket 601, the bottom arc-shaped frame of which is installed on the bottom arc surface of the gas storage reservoir 1 by welding;

[0070] At least one support ring 602, which is located at the top end of the arc-shaped bracket 601;

[0071] A plurality of cross beams 603, which are used for connecting each arc-shaped bracket 601 to increase the stability of the support mechanism 6;

[0072] Wherein, each of the support rings 602 is sleeved on the transverse pipe of the top pipe 4.

[0073] Specifically, the bottom arc-shaped frame of the arc-shaped bracket 601 is made of high-quality aluminum alloy material, which has extremely high strength and corrosion resistance, and can withstand various stresses in the complex environment inside the gas storage reservoir 1. During the installation process, the bottom arc-shaped frame of the arc-shaped bracket 601 is welded to the arc surface at the bottom of the gas storage reservoir 1 through the welding process, ensuring that the strength of the welded part reaches or even exceeds the strength standard of the bracket itself to cope with the vibration, displacement and other situations that may occur during the operation of the gas storage reservoir.

[0074] The support ring 602 is made of a special aluminum alloy material. This material not only has good toughness and can adapt to the slight shaking of the top pipe 4 during operation, but also can effectively buffer the acting force caused by pipe vibration or gas flow impact. The inner diameter of the support ring 602 is precisely calculated and processed, and it can just be tightly and flexibly sleeved on the transverse pipe of the top pipe 4, providing stable support for the pipe while not hindering the normal displacement and deformation of the pipe within a certain range.

[0075] To further enhance the stability of the support mechanism 6, a plurality of cross beams 603 are also provided. The cross beams 603 are also made of high-strength aluminum alloy material, and their lengths and spacings are reasonably planned according to the actual size of the gas storage reservoir 1 and the layout of the top pipe 4. These cross beams 603 span between each arc-shaped bracket 601 and connect each arc-shaped bracket 601 tightly to each other by means of welding or high-strength bolt connection. The support mechanism 6 forms a stable space frame structure, greatly improving the overall load-bearing capacity and anti-deformation ability, and can better meet the requirements of supporting the top pipe 4 under the complex working conditions inside the gas storage reservoir 1, providing structural support guarantee for the safe and stable operation of the entire gas storage reservoir system.

[0076] Embodiment 2

[0077] A cooling method, which is applicable to the gas injection pipeline diversion and cooling device in the tunnel-type gas storage reservoir described in the above Embodiment 1, and the method includes:

[0078] S1. The outside air enters the gas storage 1 through the manhole duct 2. When the air reaches the air inlet of the gas storage 1, its temperature is relatively low. It passes through the swing duct 3 and reaches the top duct 4, and blows the cold air into the upper part of the gas storage 1 through the air outlet holes 5 on the lower side of the top duct 4, reducing the temperature of the upper part of the gas storage 1.

[0079] Specifically, when the air reaches the air inlet of the gas storage 1, due to the influence of external environmental factors, its temperature is relatively low. Subsequently, the air moves forward along the inside of the swing duct 3, flows in the duct, and gradually climbs to the higher part of the gas storage. It finally reaches the top duct 4. The air outlet holes 5 that gradually increase are evenly distributed on the lower side of the top duct 4. When the air flows through here, it is blown into the upper space of the gas storage 1 in a jet shape through the air outlet holes 5. These blown cold airs quickly spread in the upper part of the gas storage 1 and continuously exchange heat with the surrounding hot air, thus effectively reducing the temperature of the upper part of the gas storage 1 and playing a key role in maintaining a suitable temperature environment inside the gas storage.

[0080] S2. Through the gradually increasing air outlet holes 5 at the lower part of the top duct 4, the temperature uniformity along the axis of the gas storage 1 is improved.

[0081] Specifically, from the axial view of the gas storage 1, the cold air ejected from the smaller air outlet holes forms a low-temperature area nearby, while the cold air ejected from the larger air outlet holes can cover a farther position. The cold air jets with different intensities intersect and merge, fully spread within the axial range of the upper part of the gas storage 1, and continuously exchange heat with the surrounding originally hotter air. During this process, the heat in the high-temperature area is continuously neutralized by the cold air, and the low-temperature area is also continuously supplemented and mixed with the cold air. Finally, the temperature uniformity along the axis of the gas storage 1 is significantly improved, providing a more suitable and stable temperature environment for the stable operation of various equipment inside the gas storage and the good preservation of stored substances.

[0082] S3. When the cold air passes through the top duct 4, heat exchange occurs with the outside of the top duct 4, bringing the heat of the upper part of the gas storage 1 to the lower part of the gas storage 1, promoting the heat exchange between the upper and lower parts of the gas storage 1 to reduce the temperature of the upper part of the gas storage.

[0083] Specifically, in the lower space of the gas storage reservoir 1, the temperature was originally relatively high. With the entry of this cold air carrying the heat from the upper part, intense mixing began between the hot and cold air. During the mixing process, the cold air continuously absorbed the heat from the lower part, further realizing the heat exchange between the upper and lower parts of the gas storage reservoir 1. In this way, the heat from the upper part of the gas storage reservoir 1 was brought to the lower part. The temperature of the upper part decreased due to heat loss, while the temperature distribution in the lower part was further adjusted due to heat input and air mixing. Through this continuous heat exchange process, the heat distribution between the upper and lower parts of the gas storage reservoir 1 became more balanced, effectively reducing the excessively high temperature in the upper part of the gas storage reservoir 1, creating a more suitable and stable temperature environment inside the gas storage reservoir, which is extremely beneficial to the smooth operation of various equipment inside the gas storage reservoir and the proper preservation of the stored substances.

[0084] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, various different ways can be used to modify the described embodiments without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A diversion and cooling device for the gas injection pipeline in a tunnel-type gas storage reservoir. This device is applied in the gas storage reservoir (1) to complete the change of the air distribution inside the gas storage reservoir (1), achieve the reduction of the temperature at the top inside the gas storage reservoir (1), and improve the gas filling speed inside the gas storage reservoir (1). It is characterized in that, The device includes: A manhole pipe (2), which is installed on the sealed end of the gas storage reservoir (1); A swing pipe (3), which is used to compensate for displacement and buffer pressure by its own swing and deformation when the gas storage reservoir (1) is affected by geological condition changes, temperature changes and gas pressure fluctuations during operation, so as to avoid damage to the manhole pipe (2) due to stress concentration; The swing pipe (3) is located inside the gas storage reservoir (1), and one end of it is rotatably connected to one end of the manhole pipe (2); A top pipe (4), which is located inside the gas storage reservoir (1); One end of the top pipe (4) is connected to the other end of the swing pipe (3), and the other end is located at the bottom away from the sealed end of the gas storage reservoir (1); A plurality of air outlet holes (5), which are sequentially arranged on the transverse pipe of the top pipe (4) along the length direction of the transverse pipe of the top pipe (4); A support mechanism (6), which is fixedly installed inside the gas storage reservoir (1); The support mechanism (6) is used to support the transverse pipe of the top pipe (4) at the top inside the gas storage reservoir (1); Among them, the aperture diameters of the plurality of air outlet holes (5) opened from one end of the manhole pipe (2) gradually increase in sequence, so as to improve the axial uniformity of temperature in the gas storage reservoir (1).

2. The gas injection pipeline flow guiding and temperature reducing device in the tunnel-type gas storage reservoir according to claim 1, wherein One end of the swing pipe (3) is connected to one end of the manhole pipe (2) through a rotating mechanism (7). When the swing pipe (3) swings and deforms itself through the rotating mechanism (7) and the manhole pipe (2), the protection of the top pipe (4) and the protection of the sealing performance and stability of the gas storage reservoir (1) are completed.

3. The gas injection pipeline flow guiding and cooling device in the tunnel-type gas storage reservoir according to claim 2, characterized in that, The rotating mechanism (7) includes: A rotating groove (701), which is opened on the outer surface of the manhole pipe (2); A rotating slider (702), which is fixedly installed on the end face of the swing pipe (3) close to the manhole pipe (2); Among them, the rotating slider (702) is embedded in the rotating groove (701); When the swing pipe (3) is affected by geological condition changes, temperature changes and gas pressure fluctuations, the swing pipe (3) realizes its own swing and deformation through the sliding of the rotating slider (702) in the rotating groove (701).

4. The gas injection pipeline flow guiding and temperature reducing device in the tunnel-type gas storage reservoir according to claim 1, wherein The support mechanism (6) includes: At least one arc-shaped bracket (601), the bottom arc-shaped body of which is installed on the bottom arc-shaped surface of the gas storage reservoir (1) by welding; At least one support ring (602), which is located at the top end of the arc-shaped bracket (601); A plurality of cross beams (603), which are used for connecting each arc-shaped bracket (601) to increase the stability of the support mechanism (6); Among them, each support ring (602) is sleeved on the transverse pipe of the top pipe (4).

5. The gas injection pipeline diversion and cooling device in the tunnel-type gas storage reservoir according to claim 1, wherein The pipe body of the swing pipe (3) close to one end of the manhole pipe (2) is a reducing pipe; The pipe diameter of the end face of the pipe body of the swing pipe (3) close to one end of the manhole pipe (2) is the same as that of the manhole pipe (2); The pipe diameter of the end face of the pipe body of the swing pipe (3) connected to one end of the top pipe (4) is the same as that of the top pipe (4).

6. Cooling method, characterized in that, This method is applicable to the gas injection pipeline diversion and cooling device in the tunnel-type gas storage reservoir described in any one of claims 1-5. This method includes: S1. External air enters the gas storage (1) through the manhole duct (2). When the air reaches the air inlet of the gas storage (1), its temperature is relatively low. It passes through the swing pipe (3) and reaches the top pipe (4), and through the air outlet holes (5) on the lower side of the top pipe (4), the cold air is blown into the upper part of the gas storage (1) to lower the temperature of the upper part of the gas storage (1). S2. Through the gradually increasing air outlet holes (5) at the lower part of the top pipe (4), the uniformity of the temperature along the axial direction of the gas storage (1) is improved. S3. When the cold air passes through the top pipe (4), heat exchange occurs with the outside of the top pipe (4), and the heat in the upper part of the gas storage (1) is carried to the lower part of the gas storage (1), promoting heat exchange between the upper and lower parts of the gas storage (1) to lower the temperature of the upper part of the gas storage.

Images