CN-121994606-A - Simulator for caulking performance of flexible sealing material

Abstract

The invention relates to the field of compressed air energy storage sealing materials, in particular to a simulation device for caulking performance of a flexible sealing material. The device shown comprises a high pressure control system, a test chamber and a connecting line. The test chamber is internally provided with an annular lining with prefabricated cracks, a flexible sealing layer and a high-pressure air bag from outside to inside in sequence, and the high-pressure air bag applies radial pressure to the flexible sealing layer through pressure change under the action of a high-pressure control system and is used for simulating the influence of lining cracks on the caulking performance of the flexible sealing layer under the high-internal pressure condition. By adjusting the width of the lining crack, the material and thickness of the flexible sealing layer and the loading pressure parameters, the caulking behavior and the damage characteristics of the flexible sealing material under different working conditions can be simulated and evaluated. The method can truly restore the stress state and caulking characteristics of the flexible sealing layer in the compressed air energy storage cavity, and provides a test means for evaluating engineering applicability of the flexible sealing material.

Inventors

• ZHANG YANG
• HAN YUE
• LIU NING
• CHEN PINGZHI
• LI ZHENGLIANG
• ZHOU YONG
• WANG HONGZHEN

Assignees

• 中国电建集团华东勘测设计研究院有限公司

Dates

Publication Date

20260508

Application Date

20260108

Claims (10)

1. 1. A simulation device for the caulking performance of a flexible sealing material is characterized by comprising a high-pressure control system, a test chamber and a connecting pipeline communicated with the test chamber, wherein the test chamber comprises a high-pressure resistant steel barrel, a prefabricated annular lining arranged in the high-pressure resistant steel barrel, a flexible sealing layer and a high-pressure air bag, the prefabricated annular lining is provided with prefabricated cracks and is used for simulating a tensioning crack formed by the lining under the action of high internal pressure, the flexible sealing layer is arranged on the inner side of the prefabricated annular lining, and the high-pressure air bag is arranged on the inner side of the flexible sealing layer and applies radial pressure to the flexible sealing layer through pressure change under the action of the high-pressure control system so as to simulate the caulking performance of the flexible sealing layer at the lining crack under the condition of high internal pressure.
2. 2. The device for simulating the caulking behavior of a flexible sealing material according to claim 1, wherein the high-pressure control system comprises an oil cylinder, a motor, a power pump and a control panel, and the power pump drives the oil cylinder to convey or recover hydraulic oil into the high-pressure air bag under the control of the control panel.
3. 3. The simulation device according to claim 1, wherein the high pressure resistant steel drum comprises a steel drum body, and an upper cover plate and a lower cover plate which are arranged at the upper end and the lower end of the steel drum body, wherein the upper cover plate and the lower cover plate are connected with the steel drum body through bolts, so that the test chamber forms a closed high pressure resistant space.
4. 4. A simulation device according to claim 3, wherein the upper cover plate and the lower cover plate are fixedly connected through a large bolt penetrating through the high-pressure air bag, so that the overall stability of the high-pressure resistant steel drum in the high-internal pressure loading process is enhanced.
5. 5. A simulation device according to claim 1, wherein the prefabricated ring lining is formed by assembling a plurality of steel tiles, the width of the prefabricated crack being adjusted by changing steel tiles of different sizes.
6. 6. A simulation device according to claim 1 or 5, wherein the flexible sealing layer is a detachably arranged sample layer, which can be replaced by flexible sealing materials of different materials and/or different thicknesses according to test requirements.
7. 7. A simulation device according to claim 1, wherein the high-pressure air bag is made of a high-strength rubber material, has good sealing performance and hoop deformability, and can withstand an internal pressure of not less than 20 MPa.
8. 8. The simulation device according to claim 7, wherein sealing plugs are respectively arranged at the upper end and the lower end of the high-pressure air bag, the sealing plugs are connected with the high-pressure air bag in a buckling mode, and the sealing plugs are fixedly connected with the upper cover plate and the lower cover plate through bolts, so that limiting of the high-pressure air bag in the axial direction is achieved.
9. 9. A simulation device according to claim 1, wherein the connecting line comprises an oil delivery pipe, a valve and a pressure gauge, the oil delivery pipe being in communication with the high pressure balloon.
10. 10. A simulation device according to claim 1, wherein the test chamber is of a detachable structure, and the caulking behaviour of the flexible sealing layer and its damage condition are observed and measured by sequentially detaching the upper cover plate, the lower cover plate and the sealing plug after pressure relief.

Description

Simulator for caulking performance of flexible sealing material Technical Field The disclosure relates to the field of compressed air energy storage sealing materials, in particular to a caulking performance simulation device of a flexible sealing material. Background The compressed air energy storage is used as a large-scale energy storage technology with great development potential, and has great significance for the national energy structure transformation. The underground gas storage cavern is a core component of the compressed air energy storage power station, and a hard rock cavern is used as an underground gas storage at present. In order to ensure the tightness and stability of the underground gas storage, a sealing layer and a lining are usually applied after the cavity is excavated, and the sealing layer and the lining and the surrounding rock of the cavity are used for resisting the high-pressure gas inside. However, conventional steel liner sealing means are costly and welding quality demanding, forcing technicians to explore more economical sealing schemes. The flexible high polymer materials such as glass fiber reinforced plastic, butyl propylene and the like are tried to be applied, but the traditional research on the flexible sealing materials mainly comprises the traditional physical and mechanical test, the actual caulking situation can not be effectively simulated, and particularly, under the condition that the internal pressure is up to more than 10MPa, the lining surrounding rock is easy to generate tensioning cracks, so that higher requirements are put on the caulking state of the sealing layer, and the safe operation of a storage is directly influenced. Disclosure of Invention The present disclosure provides a simulation device for caulking performance of a flexible sealing material, and aims to simulate the influence of a tensioning crack generated by lining of a compressed air energy storage cavity in a high internal pressure state on a sealing layer, reveal high pressure operation characteristics and caulking performance of the flexible sealing layer, and evaluate engineering applicability of the flexible sealing layer. In order to achieve the above purpose, the present disclosure adopts the following technical scheme: The device for simulating the caulking performance of the flexible sealing material comprises a high-pressure control system, a test chamber and a connecting pipeline communicated with the test chamber, wherein the test chamber comprises a high-pressure resistant steel barrel, a prefabricated annular lining arranged in the high-pressure resistant steel barrel, a flexible sealing layer and a high-pressure air bag, the prefabricated annular lining is provided with prefabricated cracks and used for simulating a tensioning crack formed by the lining under the action of high internal pressure, the flexible sealing layer is arranged on the inner side of the prefabricated annular lining, and the high-pressure air bag is arranged on the inner side of the flexible sealing layer and applies radial pressure to the flexible sealing layer through pressure change under the action of the high-pressure control system so as to simulate the caulking performance of the flexible sealing layer at the lining crack under the condition of high internal pressure. Further, the high-pressure control system is characterized by comprising an oil cylinder, a motor, a power pump and a control panel, wherein the power pump drives the oil cylinder to convey or recycle hydraulic oil into the high-pressure air bag under the control of the control panel. Further, the high-pressure-resistant steel drum comprises a steel drum body, and an upper cover plate and a lower cover plate which are arranged at the upper end and the lower end of the steel drum body, wherein the upper cover plate and the lower cover plate are connected with the steel drum body through bolts, so that the test chamber forms a closed high-pressure-resistant space. Further, the upper cover plate and the lower cover plate are fixedly connected through a large bolt penetrating through the high-pressure air bag, so that the overall stability of the high-pressure-resistant steel drum in the high-internal pressure loading process is enhanced. Further, the prefabricated annular lining is formed by assembling a plurality of steel tiles, and the width of the prefabricated crack is adjusted by replacing steel tiles with different sizes. Further, the flexible sealing layer is a sample layer which is detachably arranged, and can be replaced by flexible sealing materials with different materials and/or different thicknesses according to test requirements. Further, the high-pressure air bag is made of high-strength rubber materials, has good sealing performance and circumferential deformation capacity, and can bear internal pressure not lower than 20 MPa. Further, sealing plugs are respectively arranged at the upper end and the lower end of the hig