Plugging head and gas storage chamber
By installing a sealing head in the gas storage ring and adjusting the direction of the gas inlet and outlet pipes, the airflow is made to circulate in one direction, which solves the problem of extreme high temperature generated when the airflow meets in the annular gas storage chamber, improves the gas filling and storage efficiency, and reduces the amount of engineering work and cost.
Patent Information
- Application Number
- CN202423270343.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-27
AI Technical Summary
In existing annular gas storage chamber structures, the intersection of the auxiliary chamber and the gas storage chamber is orthogonal or nearly orthogonal. This causes two airflows with opposite directions and similar flow rates to meet at a certain cross section inside the gas storage chamber during inflation, resulting in extreme high temperatures and affecting inflation efficiency.
A plug is installed at the intersection of the gas storage ring and the auxiliary chamber, and a connecting channel is set along the axis of the gas storage ring. The outlet end of the gas inlet and outlet pipe is bent on one side towards the axis of the gas storage ring to ensure unidirectional circulation of airflow and reduce energy loss.
It reduces the risk of extreme high temperatures, improves inflation and storage efficiency, and reduces engineering costs and maintenance difficulty.
Smart Images
Figure CN223510982U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to compressed air energy storage technology field, especially a kind of plugging head and gas storage chamber. BACKGROUND
[0002] Compressed air energy storage technology is a new energy storage method using high-pressure air to store energy, and its working principle is that when the grid load is low, the excess energy in the grid is used to drive the compressor to compress and store air in the gas storage device. When the grid load is high, high-pressure air is released to drive the expander to work, and the stored energy is converted into electrical energy. In this technology, the tunnel-type underground artificial chamber as a kind of gas storage device has the advantages of convenient construction, safety and reliability, flexible layout method, etc., and becomes an important part of compressed air energy storage power station.
[0003] The gas storage pressure of high-pressure gas storage chamber is generally around 7MPa~15MPa, which belongs to the range of medium-high pressure. During the process of filling air from normal pressure, the temperature inside the chamber will continuously rise due to air compression and the conversion of kinetic energy at the inlet into internal energy. The temperature rising speed at different parts of the chamber is not uniform. The smaller the air flow rate, the smaller the air density, and the higher the temperature. In places where the air flow rate is close to zero, extreme high temperature will occur. With the continuous increase of the rated gas storage pressure of the gas storage chamber, the local extreme temperature may even reach 700 degrees Celsius.
[0004] At present, the research on the planar arrangement of compressed air energy storage tunnel-type gas storage chamber is mainly focused on the shape of a single chamber, which is either straight cylindrical or ring-shaped. For straight cylindrical gas storage chambers, a single chamber is arranged linearly underground with a blind end at the tail end, and the air flow rate is basically close to zero, which is prone to extreme high temperature. For ring-shaped gas storage chambers, the chamber is excavated in a structure connected at the head and tail, forming a ring-shaped channel. Compared with straight cylindrical gas storage chambers, this structure avoids blind end maintenance work. Figure 1The shown one kind ring type gas storage chamber structure includes gas storage ring channel 10 and the auxiliary chamber 20 (shaft or inclined shaft) connected gas storage ring channel 10, and the gas storage ring channel 10 is annular;Correspondingly, in order to ensure that the annular channel has good gas flow capacity, a plugging head is generally arranged in the auxiliary chamber to block the annular channel, so as to avoid air leakage in the gas storage chamber, and the gas inlet and outlet pipeline is arranged through the plugging head to connect the auxiliary chamber and the annular channel. In the actual research process, according to the air flow principle and simulation verification, it is found that due to the existing ring type arrangement of the chamber structure, the intersection of the auxiliary chamber and the gas storage chamber is generally orthogonal or approximately orthogonal, and the inlet direction is perpendicular or basically perpendicular to the wall of the gas storage chamber. In this case, the inlet will produce two air flows in opposite directions with equivalent flow rate, which will eventually meet at a certain cross section inside the gas storage chamber, and the gas flow rate at this point is close to zero, which will cause a large energy loss and an extremely high temperature phenomenon. This extremely high temperature environment will cause irreversible damage to the structure and material of the gas storage chamber. Therefore, in the process of inflating the gas storage chamber, the existing technology generally slows down the inflation speed, and continues to inflate after the temperature in the chamber slowly decreases. In this way, the gas storage chamber is inflated until the operating gas storage pressure is reached, and the inflation time is long and the gas storage efficiency is low.
[0005] Therefore, how to improve the temperature effect of the existing ring type gas storage chamber and improve the gas storage efficiency of the chamber needs further research by technical personnel. Practical new type content
[0006] The utility model discloses to the following technical scheme, which is used to solve the problems in the prior art that the intersection of the auxiliary chamber and the gas storage chamber is orthogonal or approximately orthogonal, the inlet gas flow produces two air flows in opposite directions with equivalent flow rate, and finally meets at a certain cross section inside the gas storage chamber to produce an extremely high temperature phenomenon, thereby affecting the inflation efficiency.
[0007] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows:
[0008] A plugging head, comprising a plugging head body, the plugging head body is used to be arranged in the position of intersection of the gas storage ring channel and the auxiliary chamber, the plugging head body is provided with a connecting channel along the axis direction of the gas storage ring channel, the plugging head body is provided with a gas inlet and outlet pipeline, the gas inlet and outlet pipeline is used to connect the gas storage ring channel and the auxiliary chamber, and the outlet end of the gas inlet and outlet pipeline is curved to one side of the axis direction of the gas storage ring channel.
[0009] The utility model discloses a plugging head is provided, which is arranged in a gas storage ring channel and is connected to auxiliary chambers through a connecting channel.
[0010] Moreover, the plugging head is arranged at the intersection in the gas storage ring channel, and a gas inlet and outlet pipeline is arranged in the plugging head, so that the compressive resistance of the concrete of the plugging head is fully utilized, and the intake air flow is not directly applied to the sidewall of the chamber during the inflation of the existing gas storage chamber, so that the sidewall of the chamber is buffered or resisted by the plugging head against the cyclic impact of the intake air flow dynamic load. The plugging head has stronger impact resistance and is easier to maintain than the chamber structure, which is beneficial to the structural stability.
[0011] In addition, in the prior art, the plugging head arranged in the auxiliary chamber is generally designed to be relatively long in order to resist the pushing force of compressed air on the plugging head and balance the high-pressure gas thrust through the lateral friction resistance of the plugging head. In the present scheme, the plugging head is arranged in the gas storage ring channel and connected to the chambers at both ends through the connecting channel. During the operation stage (non-inflation and discharge stage, stable gas pressure in the hole), the gas pressure thrust at both ends of the plugging head is basically balanced, which can maintain the balance of the gas pressure, so that the length of the plugging head can be reduced, the engineering quantity of the plugging head can be reduced, and the engineering cost can be reduced.
[0012] As a preferred scheme of the utility model, the end faces of the plugging head body are concave towards the connecting channel, which is beneficial to the flow of the gas to the connecting channel, reduces the energy loss, and reduces the pouring engineering quantity of the plugging head.
[0013] As a preferred scheme of the utility model, the end faces of the plugging head body are conical.
[0014] As another preferred scheme of the utility model, the end of the plugging head body is semispherical.
[0015] As a preferred scheme of the utility model, the connecting channel is arranged at the center position of the cross section of the plugging head body, which is more uniform in stress.
[0016] As a preferred scheme of the utility model, the gas inlet and outlet pipeline is arranged outside the connecting channel, such as the bottom, side or top of the connecting channel.
[0017] As a preferred scheme of the utility model, the turning part of the gas inlet and outlet pipeline is equipped with a flow guide device for reducing the energy loss of the turning part of the gas inlet and outlet pipeline.
[0018] As a preferred scheme of the utility model, the flow guide device is an arc-shaped flow guide plate, and a plurality of flow guide plates are arranged in parallel.
[0019] The scheme can split the airflow blown into the gas inlet and outlet pipeline by arranging a plurality of arc-shaped flow guide plates at the turning part of the gas inlet and outlet pipeline, reduce the energy impact of single airflow, reduce energy loss and improve energy utilization.
[0020] The utility model also provides a kind of gas storage chamber, including gas storage ring and auxiliary chamber, the gas storage ring is annular, the gas storage ring and the auxiliary chamber are connected across, the gas storage ring is equipped with the above-mentioned any plugging head, the plugging head is located at the intersection of the gas storage ring and the auxiliary chamber.Using the above-mentioned gas storage chamber, it is favorable to improve the temperature dissipation effect during inflation stage, improve inflation efficiency, improve gas storage efficiency.
[0021] As a preferred scheme of the utility model, the gas storage ring and the auxiliary chamber are both arranged horizontally, that is, the auxiliary chamber is connected with the side wall of the gas storage ring, which is beneficial to reduce the interference to the overlying rock mass of the gas storage chamber, and the plugging head is easy to construct.
[0022] As described above, due to the adoption of the above technical scheme, the utility model has the following beneficial effects:
[0023] The plugging head provided by the utility model is suitable for the gas storage chamber structure in which the gas storage ring and the auxiliary passage are arranged across, and can meet the demand of gas circulation around the gas storage ring, realize one-side gas blowing, avoid generating two airflow with opposite directions at the inlet, reduce the risk of extreme high temperature phenomenon caused by the meeting of gas flow at a certain cross section in the chamber, reduce energy loss, and thus improve gas storage efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 is a structural schematic diagram of a ring-type gas storage chamber structure in the prior art;
[0025] Figure 2 is a use state diagram of a plugging head in embodiment 1;
[0026] Figure 3 is Figure 2 is an enlarged structure diagram of plugging head setting part in embodiment 1;
[0027] Figure 4 is Figure 2 is a cross-sectional view of A-A in embodiment 1;
[0028] Figure 5 This is a magnified view of a section where a baffle is installed at a bend in the gas inlet / outlet pipeline.
[0029] Figure 1 The markings in the text are: 10 - Gas storage ring channel; 20 - Auxiliary channel;
[0030] Figures 2-5 The labels in the text are: 1-plug head; 11-connection channel; 12-gas inlet and outlet pipeline; 2-gas storage ring; 3-auxiliary chamber; 4-guide plate. Detailed Implementation
[0031] The present invention will now be described in detail with reference to the accompanying drawings.
[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0033] Example 1
[0034] A type of sealing head 1, such as Figures 2-4 As shown, the device includes a sealing head body, which is positioned within the gas storage ring 2 at the intersection with the auxiliary chamber 3. The sealing head body has a connecting channel 11 along the axial direction of the gas storage ring 2. The connecting channel 11 is a large-diameter pipe connecting the two gas storage chambers. The sealing head body also has a gas inlet / outlet pipe 12, which connects the gas storage ring 2 and the auxiliary chamber 3. The gas inlet / outlet pipe 12 is a curved pipe, with the curvature angle designed to ensure the gas direction is parallel to the wall of the gas storage chamber. The inlet end of the gas inlet / outlet pipe 12 faces the auxiliary chamber 3, and the outlet end faces either side of the axial direction of the gas storage ring 2.
[0035] In this embodiment, a sealing head 1 is installed at the intersection of the gas storage ring channel 2 and the auxiliary chamber 3, and a connecting channel 11 is set along the axial direction of the gas storage ring channel 2 to connect the chamber gas at both ends of the sealing head 1, ensuring that the airflow in the gas storage ring channel 2 can circulate. At the same time, by bending the gas inlet and outlet pipes 12 so that their outlet ends face one side of the axial direction of the gas storage ring channel 2, the airflow at the chamber inlet can circulate unidirectionally along the axial direction during inflation, thereby reducing the risk of extreme high temperature phenomena caused by the airflow at a certain cross section meeting in the chamber and reducing energy loss.
[0036] Moreover, the scheme fully utilizes the compression resistance of the concrete of the plugging head by setting the plugging head 1 at the intersection in the gas storage ring 2 and setting the gas inlet and outlet pipeline 12 in the plugging head, avoids the direct action of the gas flow on the sidewall of the chamber when the chamber is filled with gas, and makes the sidewall of the chamber buffer or resist the cyclic impact of the gas flow load through the plugging head 1. The plugging head 1 has stronger impact resistance and is easier to maintain than the chamber structure, which is conducive to the stability of the structure.
[0037] In the prior art, the plugging head 1 arranged in the auxiliary chamber 3 is generally designed to have a relatively long length in order to resist the pushing force of the compressed air on the plugging head and balance the lateral friction of the plugging head 1. In the present scheme, the plugging head 1 is arranged in the gas storage ring 2 and connected to the two end chambers through the connecting channel 11. During the operation stage (non-gas filling and discharging stage, stable gas pressure in the hole), the gas pressure on both ends of the plugging head 1 is basically balanced, which can maintain the gas pressure balance, and thus the length of the plugging head 1 can be reduced, the engineering quantity of the plugging head 1 can be reduced, and the engineering cost can be reduced.
[0038] In the present embodiment, the connecting channel 11 is arranged at the central position of the cross section of the plugging head body, so that the end face has good stress resistance. The gas inlet and outlet pipeline 12 is arranged outside the connecting channel 11; the gas inlet and outlet pipeline 12 is arranged above and below the connecting channel 11 and is cast in the self-balancing plugging head, and the positional relationship is shown in the accompanying drawings. Figure 4 The diameter of the connecting pipeline should be large, and the diameter of the gas inlet and outlet pipeline 12 should be small. The inlet gas passes through the plugging head 1 from the gas inlet and outlet pipeline 12, enters the gas storage ring 2 along one side, enters the connecting pipeline after one cycle, and forms the circulating gas flow shown in Figure 2 after the flow field is stable.
[0039] Further, in order to make the gas flow on both sides of the inlet and outlet connecting pipeline have good transition, and considering the stress requirement of the lining structure, the end face of the plugging head 1 is arranged in a flow guiding structure. As shown in Figure 3 , the present embodiment preferably gradually transitions from the hole diameter D1 to the connecting pipeline diameter D2 in a conical surface form on both sides of the plugging head, and the slope β is preferably 1:3, which is conducive to reducing energy loss and also reducing the casting engineering quantity of the plugging head 1. As other implementable manners, the end faces of the plugging head body can also be arranged in a hemispherical structure form and recessed towards the connecting channel 11, and the diameter of the hemisphere is the same as the diameter of the plugging head body, which is not limited to the above examples.
[0040] The plugging head 1 in the present scheme changes the direction of the inlet gas flow of the gas storage ring 2 by using a curved pipeline, and connects the two sides of the plugging head through a connecting pipeline, so that a circulating gas flow is formed in the gas storage chamber, the temperature control purpose is achieved, the uniformity of the temperature in the gas storage chamber during the gas filling stage is improved, and the gas filling efficiency and the gas storage efficiency are improved.
[0041] Further, due to the large air speed in the gas inlet and outlet pipeline 12, a large speed loss will be generated at the curved pipeline turn, which also increases the energy in the gas storage chamber. The embodiment preferably provides a flow guide device at the turn of the gas inlet and outlet pipeline 12, which can be used to eliminate the vortex at the turn and effectively reduce the flow rate difference between the inside and outside of the pipeline after the turn. Specifically, as shown in Figure 5 the flow guide device is an arc-shaped flow guide plate 4, one end of the flow guide plate 4 receives the gas inlet flow of the gas inlet and outlet pipeline 12 and smoothly guides out along the other end; the number of flow guide plates 4 is several, and the several flow guide plates 4 are arranged in parallel and at intervals, and are arranged obliquely at the corner; the flow of the filling gas in the gas inlet and outlet pipeline 12 is divided by the several flow guide plates 4, the impact energy of the single gas flow is reduced, and the heat loss is reduced. The setting of the flow guide plate 4 can reduce the heat loss of the inlet gas flow at the turn of the pipeline, reduce the entropy of the outlet gas flow, thereby improving the energy utilization rate and increasing the gas storage efficiency.
[0042] According to the numerical simulation experiment, for the gas inlet and outlet pipeline 12 with a diameter of 1m, 5 flow guide plates 4 are arranged in a row, which is better for eliminating the vortex at the turn of the curved pipeline and reducing the flow rate difference between the inside and outside of the pipeline after the turn.
[0043] Embodiment 2
[0044] The embodiment also provides a gas storage chamber, as shown in Figure 2 which comprises a gas storage ring 2 and an auxiliary chamber 3, the gas storage ring 2 is annular, the gas storage ring 2 and the auxiliary chamber 3 are connected in cross, and the gas storage ring 2 is provided with any one of the above-mentioned sealing heads 1, and the sealing head 1 is located at the intersection of the gas storage ring 2 and the auxiliary chamber 3. The above-mentioned gas storage chamber is adopted, which is beneficial to improve the uniformity of the temperature in the gas storage chamber during the inflation stage, improve the inflation efficiency, and improve the gas storage efficiency.
[0045] Further, the gas storage ring 2 and the auxiliary chamber 3 are transversely arranged, that is, the auxiliary chamber 3 is connected with the side wall of the gas storage ring 2, which is beneficial to reduce the interference with the overlying rock mass of the gas storage chamber. The gas storage ring 2 in the embodiment is preferably in the shape of a racetrack, which comprises two gas storage straight lines and two semicircular curves, and is convenient to construct.
[0046] The above-mentioned is only a preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A sealing head (1), characterized in that, The device includes a sealing head body, which is used to be installed at the intersection of the gas storage ring (2) and the auxiliary chamber (3). The sealing head body is provided with a connecting channel (11) along the axial direction of the gas storage ring (2). The sealing head body is provided with a gas inlet and outlet pipe (12), which is used to connect the gas storage ring (2) and the auxiliary chamber (3). The outlet end of the gas inlet and outlet pipe (12) is bent on one side towards the axial direction of the gas storage ring (2).
2. The sealing head (1) according to claim 1, characterized in that, The two end faces of the sealing head body are recessed towards the connecting channel (11).
3. A sealing head (1) according to claim 2, characterized in that, The end face of the sealing head body is conical or hemispherical.
4. A sealing head (1) according to claim 2, characterized in that, The connecting channel (11) is set at the center of the cross-section of the sealing head body.
5. A sealing head (1) according to any one of claims 1-4, characterized in that, The gas inlet / outlet pipe (12) is located outside the connecting channel (11).
6. A sealing head (1) according to any one of claims 1-4, characterized in that, A flow guide device is provided at the bend of the gas inlet / outlet pipe (12).
7. A sealing head (1) according to claim 6, characterized in that, The flow guiding device is an arc-shaped flow guiding plate (4), and there are several flow guiding plates (4), which are arranged in parallel at intervals.
8. A gas storage chamber, characterized in that, It includes a gas storage ring channel (2) and an auxiliary chamber (3). The gas storage ring channel (2) is annular and the gas storage ring channel (2) and the auxiliary chamber (3) are cross-connected. The gas storage ring channel (2) is provided with a sealing head (1) according to any one of claims 1-7. The sealing head (1) is located at the intersection of the gas storage ring channel (2) and the auxiliary chamber (3).
9. The gas storage chamber according to claim 8, characterized in that, The length of the plug head (1) is greater than the diameter of the auxiliary chamber (3).
10. The gas storage chamber according to claim 8 or 9, characterized in that, Both the gas storage ring (2) and the auxiliary chamber (3) are arranged horizontally.