CN-121977158-A - Combined sealing structure of underground gas storage chamber

CN121977158ACN 121977158 ACN121977158 ACN 121977158ACN-121977158-A

Abstract

The invention relates to the technical field of underground gas storage, and discloses a composite sealing structure of an underground gas storage chamber, which comprises a lining covered on the wall of the underground gas storage chamber, wherein one side of the lining, which is close to the wall of the underground gas storage chamber, is provided with a drainage system, the other side of the lining is sequentially covered with a buffer layer and a gas-tight plate, the drainage system comprises a drainage pipe, a water inlet hole and a flow guide pipe, the drainage pipe is arranged in the lining along the horizontal direction, a plurality of groups of drainage pipes are arranged at intervals along the circumferential direction of the underground gas storage chamber, the water inlet hole is arranged on the drainage pipe and used for communicating the inside of the drainage pipe with the wall of the underground gas storage chamber, and the adjacent drainage pipes are communicated through the flow guide pipe. According to the invention, the drainage system is arranged, so that moisture in the rock mass of the underground gas storage cavity enters from the water inlet groove, passes through the water inlet hole and enters the drainage pipe, the mixture of water seepage and sand and stone is drained through the drainage pipe, and the influence of accumulated water on the underground gas storage cavity can be effectively avoided through the drainage pipe below and the bottom drainage pipe.

Inventors

TANG XIBO
LI PENG
Yi Zhuowei

Assignees

中国电建集团中南勘测设计研究院有限公司

Dates

Publication Date: 20260505
Application Date: 20260402

Claims (9)

1. The composite sealing structure of the underground gas storage chamber is characterized by comprising a lining which is covered on the wall of the underground gas storage chamber, wherein one side of the lining, which is close to the wall of the underground gas storage chamber, is provided with a drainage system, and the other side of the lining is sequentially covered with a buffer layer and a gas-tight plate; The drainage system comprises a drainage pipe, a water inlet hole and a diversion pipe, wherein the drainage pipe is arranged in the lining along the horizontal direction and is provided with a plurality of groups at intervals along the circumferential direction of the underground gas storage chamber, the water inlet hole is arranged on the drainage pipe and is used for communicating the inside of the drainage pipe with the wall of the underground gas storage chamber, and the adjacent drainage pipes are communicated through the diversion pipe; A chute is formed in the inner wall of the drain pipe, the chute is flush with the water inlet, and the chute is arranged along the length direction of the drain pipe and is communicated with all the water inlet on the drain pipe; the sliding type floating frame is arranged in the sliding groove, the floating frame is provided with an impact block, the impact block is positioned in the sliding groove, and when the floating frame slides along the sliding groove, the impact block is used for dredging the sliding groove.
2. The composite seal structure of an underground gas storage cavern as claimed in claim 1, wherein the lining is reinforced concrete lining, the buffer layer is polyurethane, and the airtight plate is airtight steel plate.
3. The composite seal structure of an underground gas storage cavern as claimed in claim 2, wherein the drainage system further comprises water inlet tanks arranged on one side of the lining close to the wall of the underground gas storage cavern, a plurality of groups of water inlet tanks are arranged at intervals along the length direction of the drainage pipe, and the openings of the water inlet tanks are positioned in the water inlet tanks; the water inlet holes are arranged in the water inlet grooves at intervals along the length direction of the water outlet pipe, and water in the rock mass enters the water outlet pipe from the water inlet grooves through the water inlet holes.
4. The structure of claim 3, wherein the guide pipes comprise at least two groups respectively disposed at two ends of the drain pipe, and the portion of the guide pipe at the two ends of the drain pipe located in the drain pipe is higher than the floating frame for limiting the floating frame.
5. The composite seal structure of an underground gas storage cavern according to claim 3, wherein a mounting groove is formed in the drain pipe, a separation partition plate is inserted into the mounting groove, the mounting groove is located below the water inlet hole, the separation partition plate is used for dividing the drain pipe into two parts located above and below the water inlet hole, and a filtering hole is further formed in the separation partition plate.
6. The structure of claim 5, wherein the separation partition is fixed to the installation groove by a fastening bolt, and the surface of the fastening bolt is coated with a corrosion-resistant paint.
7. The composite seal structure of an underground gas storage cavern as claimed in claim 1, wherein a slot is provided on a side surface of the airtight plate adjacent to the buffer layer, and the buffer layer is connected with the airtight plate through the slot.
8. The composite seal structure of an underground gas storage cavern according to claim 1, wherein the side of the airtight plate far away from the buffer layer is provided with a reinforcing rib, and the reinforcing rib and the airtight plate are integrally formed.
9. The structure of claim 8, wherein the draft tube is inclined.

Description

Combined sealing structure of underground gas storage chamber Technical Field The invention relates to the technical field of underground gas storage, in particular to a composite sealing structure of an underground gas storage cavity. Background The current world has unbalanced power load, and the season is greatly changed and the day and night differences are also great. The storage and rational utilization of electrical energy is of great concern. The compressed air energy storage power station uses the motor to drive the air compressor to press the compressed air into the underground air storage hole during the valley load period (such as night) when the electric load is not full, releases the compressed air to be injected into the combustion chamber to drive the gas turbine generator to generate electricity when the electric load is peak load period (such as daytime), realizes energy storage and power generation, can increase the output power to more than two times of the original output power, and has wide application. The existing underground gas storage chamber is used as a water sealing structure in the hydropower engineering through reinforced concrete lining and steel plate lining, however, when the underground gas storage chamber is used, a drainage system cannot cope with complex environments, once a pipeline is blocked to cause ponding, the use of the underground gas storage chamber is affected, meanwhile, the airtight steel plate is simple in structure and poor in supporting stability, the underground gas storage chamber is unstable to use, and offset easily occurs between the airtight steel plate and a buffer material layer, so that the buffering performance is reduced. Therefore, it is necessary to provide a composite sealing structure for an underground gas storage chamber, so as to solve the above-mentioned problems in the prior art. Disclosure of Invention The invention aims to solve the technical problem of overcoming the defects in the prior art and providing a composite sealing structure of an underground gas storage cavity which is difficult to accumulate water. In order to solve the technical problems, the invention adopts the following technical scheme: The composite sealing structure of the underground gas storage chamber comprises a lining which is covered on the wall of the underground gas storage chamber, wherein one side of the lining, which is close to the wall of the underground gas storage chamber, is provided with a drainage system, and the other side of the lining is sequentially covered with a buffer layer and a gas-tight plate; The drainage system comprises a drainage pipe, a water inlet hole and a diversion pipe, wherein the drainage pipe is arranged in the lining along the horizontal direction and is provided with a plurality of groups at intervals along the circumferential direction of the underground gas storage chamber, the water inlet hole is arranged on the drainage pipe and is used for communicating the inside of the drainage pipe with the wall of the underground gas storage chamber, and the adjacent drainage pipes are communicated through the diversion pipe; A chute is formed in the inner wall of the drain pipe, the chute is flush with the water inlet, and the chute is arranged along the length direction of the drain pipe and is communicated with all the water inlet on the drain pipe; the sliding type floating frame is arranged in the sliding groove, the floating frame is provided with an impact block, the impact block is positioned in the sliding groove, and when the floating frame slides along the sliding groove, the impact block is used for dredging the sliding groove. As a further improvement of the above technical scheme: The lining is reinforced concrete lining, the buffer layer adopts polyurethane ethyl formate, and the airtight plate is airtight steel plate. As a further improvement of the above technical scheme: The drainage system further comprises water inlet tanks arranged on one side of the lining close to the wall of the underground gas storage cavern, a plurality of groups of water inlet tanks are arranged at intervals along the length direction of the drainage pipe, and the openings of the water inlet holes are positioned in the water inlet tanks; the water inlet holes are arranged in the water inlet grooves at intervals along the length direction of the water outlet pipe, and water in the rock mass enters the water outlet pipe from the water inlet grooves through the water inlet holes. As a further improvement of the above technical scheme: The honeycomb duct is at least including setting up in two sets of at the drain pipe both ends respectively, the drain pipe both ends the honeycomb duct is located the part that is located the drain pipe is higher than the floating frame sets up, is used for right the floating frame is spacing. As a further improvement of the above technical scheme: the inside of drain pipe is equipped with the mounting groo