Compressed air energy storage sealing layer material punching shear test device and operation method thereof

Abstract

According to the compressed air energy storage sealing layer material punching shear test device and the operation method thereof, the inner cavity of the flange cover plate is pressurized through the inflation and deflation channel, and the high-pressure environment of the inner cavity of the flange cover plate is achieved. The inner diameter of the annular gasket is consistent with the size of the inner cavity of the flange cover plate, the upper surface is closely attached to the flange cover plate, and the lower surface is closely attached to the punching shear bottom plate, so that airtightness of the inner cavity of the flange cover plate is guaranteed. And a sealing layer material is placed in a central hole of the circular gasket, so that the sealing layer material is conveniently adhered and connected with the punching shear bottom plate. A preset crack is formed in the center of the punching shear bottom plate, and sealing layer punching shear stress is simulated. The punching shear bottom plate is installed on the flange base, and the punching shear test of the sealing layer materials under different combined working conditions is achieved by disassembling and replacing the punching shear bottom plates with cracks of different widths and the sealing layer materials of different thicknesses. The device is simple in structure, flexible to replace, low in cost and capable of quickly and conveniently testing the impact shear resistance of different sealing layer materials.

Description

Technical Field

[0001] The invention relates to the technical field of compressed air energy storage, and in particular to a shearing test device for compressed air energy storage sealing layer materials and an operating method thereof. Background Art

[0002] When an artificial chamber is excavated in hard rock as a compressed air energy storage reservoir, the sealing performance of the reservoir's sealing layer determines the success or failure of the project. Under high pressure, the concrete lining of the reservoir will crack and form cracks. If the selected sealing layer has weak crack resistance, the sealing layer will form puncture holes under the punching and shearing action of high-pressure air, causing leakage in the reservoir and causing serious economic losses. Therefore, when selecting the sealing layer for an artificial chamber gas storage reservoir, there is an urgent need for a sealing layer punching and shearing test device with a simple structure, flexible replacement, and low cost to quickly and conveniently test the crack resistance of different sealing layers. Summary of the invention

[0003] In order to solve the above technical problems, one of the technical solutions adopted by the present invention is: a punching and shearing test device for compressed air energy storage sealing layer materials, the device comprises: a flange base 9 for carrying the device;

[0004] The flange cover plate 3 is located above the flange base 9;

[0005] The flange cover plate inner cavity 4 is located inside the flange cover plate 3;

[0006] The gas charging and discharging channel 2 is located on the flange cover plate 3 and is used to connect the external high-pressure gas valve and compressor to complete the inflation, pressure maintenance and deflation of the inner cavity 4 of the flange cover plate;

[0007] A punching bottom plate 6 and an annular gasket 5 are provided between the flange base 9 and the flange cover plate 3;

[0008] The annular gasket 5 also has a sealing layer 7;

[0009] A preset crack 8 is provided at the center of the punching and shearing bottom plate 6;

[0010] A pressure gauge 1 is provided on the flange cover plate 3 .

[0011] The pressure gauge 1 is an electronic pressure gauge with a maximum range of 40 MPa and a measurement accuracy of 0.001 MPa.

[0012] The flange base 9 is connected to the flange cover plate 3 via a special bolt and nut assembly 10 .

[0013] The flange cover plate inner cavity 4 has a diameter of 15 to 30 cm and a height of 5 to 15 cm, ensuring that the punching and shearing bottom plate 6 has enough area to set simulated cracks. The volume of the flange cover plate inner cavity 4 can increase the pressurization rate of the flange cover plate inner cavity 4 .

[0014] The annular gasket 5 is made of metal sealing material, and its inner diameter is consistent with the size of the flange cover plate inner cavity 4. The upper surface is in close contact with the flange cover plate 3, and the lower surface is in close contact with the punching bottom plate 6 to ensure the airtightness of the flange cover plate inner cavity.

[0015] The annular gasket 5 has a thickness of 5 to 15 mm, an inner diameter of 15 to 30 cm, and an outer diameter that is 10 cm greater than the inner diameter.

[0016] The thickness of the punching and shearing bottom plate 6 and the flange base 9 should meet the existing design pressure requirements to ensure that the deformation of the punching and shearing bottom plate 6 under the action of high-pressure air will not affect the bonding between the sealing layer material 7 and the punching and shearing bottom plate 6.

[0017] The preset width of the crack 8 is 1 to 20 mm, and the preset length of the crack is 40 to 80 mm.

[0018] Another technical solution adopted by the present invention is: an operating method for the above-mentioned compressed air energy storage sealing layer material punching and shearing test device, the method comprising:

[0019] S1. Device cleaning and installation:

[0020] Use a clean rag to clean the stains on the surface of the flange cover plate 3, the annular gasket 5, the punching and shearing bottom plate 6, and the flange base 9, select the punching and shearing bottom plate 6 with a suitable crack width, and install it on the flange base 9;

[0021] S2. Sealing layer installation:

[0022] Place the annular gasket 5 on the punching and shearing bottom plate 6 and align it with the punching and shearing bottom plate 6, apply a circle of sealant on the edge of the sealing layer 7, and then install the sealing layer 7 in the central circular hole of the annular gasket 5, and compact the sealing layer 7 to ensure that the sealing layer 7 is in close contact with the punching and shearing bottom plate 6;

[0023] Among them, S201, the diameter of the sealing layer 7 is slightly smaller than the inner diameter of the annular gasket 5, which facilitates the bonding of the sealing layer 7 and the punching and shearing bottom plate;

[0024] S3. Flange cover installation:

[0025] Lift the flange cover plate 3 by a hoisting machine, adjust the angle to ensure that it is aligned with the bolt holes of the flange base 9, and connect and fix the flange cover plate and the flange base by a special bolt and nut assembly 10;

[0026] Among them, S301, when installing the bolts, tighten the bolts step by step in a diagonal order, and use a torque wrench to tighten them according to the specified torque value to ensure that the tightening force of each bolt is uniform;

[0027] S4. Pressure test and pressure holding test:

[0028] Connect the test device charging and discharging channel 2 with the compressor pipeline, open the high-pressure gas valve, and start the compressor to pressurize the test device. When the gas pressure in the test device reaches the test design pressure, turn off the compressor, close the high-pressure gas valve, start to maintain pressure, and record the test results;

[0029] Among them, S401, the pressure holding time of the pressure holding test is 24 to 72 hours. If the pressure of the experimental device can gradually stabilize, it is determined that the sealing layer specimen has passed the pressure holding test;

[0030] S5, Cyclic high and low pressure test:

[0031] When the sealing material completes the pressure-maintaining test, cut off the connection between the test device's charging and discharging channel 2 and the compressor pipeline, then slowly open the high-pressure gas valve to start pressure relief; after the pressure is relieved to the specified pressure, close the high-pressure gas valve and start pressure maintenance; after the pressure maintenance is completed, connect the test device's charging and discharging channel 2 and the compressor pipeline, open the high-pressure gas valve, and start the compressor to pressurize the test device; when the gas pressure in the test device reaches the test design pressure, turn off the compressor, close the high-pressure gas valve, and start pressure maintenance; repeat the above steps to complete the cyclic high and low pressure test, and record the test results at the same time;

[0032] Among them, the pressure holding time in S501 and high and low pressure cycle tests is generally 1 to 2 hours;

[0033] S6. Open the cover for inspection:

[0034] Use a bolt wrench to loosen the nut, lift the flange cover plate 3 by a hoisting machine, check the state of the sealing layer material, and make test records;

[0035] Among them, S601, the main items for checking the state of the sealing layer material are whether a puncture hole is formed in the sealing layer and the degree of the sealing layer intrusion into the crack.

[0036] The advantages and positive effects of the present invention are: the inner cavity of the flange cover plate is pressurized through the air filling and discharging channel to achieve a high-pressure environment in the inner cavity of the flange cover plate. The inner diameter of the annular gasket is consistent with the inner cavity size of the flange cover plate, the upper surface is in close contact with the flange cover plate, and the lower surface is in close contact with the punching and shearing bottom plate, thereby ensuring the air tightness of the inner cavity of the flange cover plate. The sealing layer material is placed in the center hole of the annular gasket to facilitate the bonding and connection of the sealing layer material with the punching and shearing bottom plate. A preset crack is set in the center of the punching and shearing bottom plate to simulate the punching and shearing force of the sealing layer. The punching and shearing bottom plate is installed on the flange base. By disassembling and replacing the punching and shearing bottom plates with cracks of different widths and the sealing layer materials of different thicknesses, the punching and shearing tests of the sealing layer materials under different combinations of working conditions can be achieved. The device has a simple structure, flexible replacement, and low cost, and can quickly and conveniently test the punching and shearing resistance of different sealing layer materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1It is a structural schematic diagram of the punching and shearing test device;

[0038] Figure 2 It is a structural schematic diagram of the flange cover;

[0039] Figure 3 It is a top view of the flange cover;

[0040] Figure 4 It is a structural schematic diagram of a circular ring gasket;

[0041] Figure 5 It is a top view of the annular gasket;

[0042] Figure 6 It is a structural schematic diagram of the punching and shearing bottom plate;

[0043] Figure 7 It is the top view of the punching and shearing bottom plate;

[0044] Figure 8 It is a structural schematic diagram of the flange base;

[0045] Fig. 9 It is a top view of the flange base;

[0046] In the figure: 1. Pressure gauge; 2. Charging and discharging channel; 3. Flange cover; 4. Inner cavity of flange cover; 5. Ring gasket; 6. Punching and shearing bottom plate; 7. Sealing layer; 8. Pre-set crack; 9. Flange base; 10. Special bolt and nut assembly. DETAILED DESCRIPTION

[0047] In order to better understand the present invention, the present invention is further described below in conjunction with specific embodiments and drawings.

[0048] Example 1

[0049] like Figure 1-Figure 5 As shown, a device for punching and shearing test of compressed air energy storage sealing layer materials comprises: a flange base 9 for supporting the device;

[0050] The flange cover plate 3 is located above the flange base 9;

[0051] The flange cover plate inner cavity 4 is located inside the flange cover plate 3;

[0052] The gas charging and discharging channel 2 is located on the flange cover plate 3 and is used to connect the external high-pressure gas valve and compressor to complete the inflation, pressure maintenance and deflation of the inner cavity 4 of the flange cover plate;

[0053] A punching bottom plate 6 and an annular gasket 5 are provided between the flange base 9 and the flange cover plate 3;

[0054] The annular gasket 5 also has a sealing layer 7;

[0055] A preset crack 8 is provided at the center of the punching and shearing bottom plate 6;

[0056] A pressure gauge 1 is provided on the flange cover plate 3 .

[0057] The pressure gauge 1 is an electronic pressure gauge with a maximum range of 40 MPa and a measurement accuracy of 0.001 MPa.

[0058] The flange base 9 is connected to the flange cover plate 3 via a special bolt and nut assembly 10 .

[0059] The flange cover plate inner cavity 4 has a diameter of 15 to 30 cm and a height of 5 to 15 cm, ensuring that the punching and shearing bottom plate 6 has enough area to set simulated cracks. The volume of the flange cover plate inner cavity 4 can increase the pressurization rate of the flange cover plate inner cavity 4 .

[0060] The annular gasket 5 is made of metal sealing material, and its inner diameter is consistent with the size of the flange cover plate inner cavity 4. The upper surface is in close contact with the flange cover plate 3, and the lower surface is in close contact with the punching bottom plate 6 to ensure the airtightness of the flange cover plate inner cavity.

[0061] The annular gasket 5 has a thickness of 5 to 15 mm, an inner diameter of 15 to 30 cm, and an outer diameter that is 10 cm greater than the inner diameter.

[0062] The thickness of the punching and shearing bottom plate 6 and the flange base 9 should meet the existing design pressure requirements to ensure that the deformation of the punching and shearing bottom plate 6 under the action of high-pressure air will not affect the bonding between the sealing layer material 7 and the punching and shearing bottom plate 6.

[0063] The preset width of the crack 8 is 1 to 20 mm, and the preset length of the crack is 40 to 80 mm.

[0064] The present invention pressurizes the inner cavity of the flange cover plate through the air charging and discharging channel to achieve a high-pressure environment in the inner cavity of the flange cover plate. The inner diameter of the annular gasket is consistent with the inner cavity size of the flange cover plate, the upper surface is in close contact with the flange cover plate, and the lower surface is in close contact with the punching and shearing bottom plate, thereby ensuring the air tightness of the inner cavity of the flange cover plate. The sealing layer material is placed in the center hole of the annular gasket to facilitate the bonding and connection of the sealing layer material with the punching and shearing bottom plate. A preset crack is set in the center of the punching and shearing bottom plate to simulate the punching and shearing force of the sealing layer. The punching and shearing bottom plate is installed on the flange base. By disassembling and replacing the punching and shearing bottom plates with cracks of different widths and the sealing layer materials of different thicknesses, the punching and shearing tests of the sealing layer materials under different combined working conditions can be achieved. The device has a simple structure, flexible replacement, and low cost, and can quickly and conveniently test the punching and shearing resistance of different sealing layer materials.

[0065] Example 2

[0066] The operating method of the compressed air energy storage sealing layer material punching and shearing test device described in the above embodiment 1 comprises:

[0067] S1. Device cleaning and installation:

[0068] Use a clean rag to clean the stains on the surface of the flange cover plate 3, the annular gasket 5, the punching and shearing bottom plate 6, and the flange base 9, select the punching and shearing bottom plate 6 with a suitable crack width, and install it on the flange base 9;

[0069] S2. Sealing layer installation:

[0070] Place the annular gasket 5 on the punching and shearing bottom plate 6 and align it with the punching and shearing bottom plate 6, apply a circle of sealant on the edge of the sealing layer 7, and then install the sealing layer 7 in the central circular hole of the annular gasket 5, and compact the sealing layer 7 to ensure that the sealing layer 7 is in close contact with the punching and shearing bottom plate 6;

[0071] Among them, S201, the diameter of the sealing layer 7 is slightly smaller than the inner diameter of the annular gasket 5, which facilitates the bonding of the sealing layer 7 and the punching and shearing bottom plate;

[0072] S3. Flange cover installation:

[0073] Lift the flange cover plate 3 by a hoisting machine, adjust the angle to ensure that it is aligned with the bolt holes of the flange base 9, and connect and fix the flange cover plate and the flange base by a special bolt and nut assembly 10;

[0074] Among them, S301, when installing the bolts, tighten the bolts step by step in a diagonal order, and use a torque wrench to tighten them according to the specified torque value to ensure that the tightening force of each bolt is uniform;

[0075] S4. Pressure test and pressure holding test:

[0076] Connect the test device charging and discharging channel 2 with the compressor pipeline, open the high-pressure gas valve, and start the compressor to pressurize the test device. When the gas pressure in the test device reaches the test design pressure, turn off the compressor, close the high-pressure gas valve, start to maintain pressure, and record the test results;

[0077] Among them, S401, the pressure holding time of the pressure holding test is 24 to 72 hours. If the pressure of the experimental device can gradually stabilize, it is determined that the sealing layer specimen has passed the pressure holding test;

[0078] S5, Cyclic high and low pressure test:

[0079] When the sealing material completes the pressure-maintaining test, cut off the connection between the test device's charging and discharging channel 2 and the compressor pipeline, then slowly open the high-pressure gas valve to start pressure relief; after the pressure is relieved to the specified pressure, close the high-pressure gas valve and start pressure maintenance; after the pressure maintenance is completed, connect the test device's charging and discharging channel 2 and the compressor pipeline, open the high-pressure gas valve, and start the compressor to pressurize the test device; when the gas pressure in the test device reaches the test design pressure, turn off the compressor, close the high-pressure gas valve, and start pressure maintenance; repeat the above steps to complete the cyclic high and low pressure test, and record the test results at the same time;

[0080] Among them, the pressure holding time in S501 and high and low pressure cycle tests is generally 1 to 2 hours;

[0081] S6. Open the cover for inspection:

[0082] Use a bolt wrench to loosen the nut, lift the flange cover plate 3 by a hoisting machine, check the state of the sealing layer material, and make test records;

[0083] Among them, S601, the main items for checking the state of the sealing layer material are whether a puncture hole is formed in the sealing layer and the degree of the sealing layer intrusion into the crack.

[0084] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of this patent.

Claims

1. Compressed air energy storage sealing layer material punching and shearing test device, characterized by: The device comprises: a flange base (9) for supporting the device; A flange cover plate (3) is located above the flange base (9); The flange cover plate inner cavity (4) is located inside the flange cover plate (3); The gas charging and discharging channel (2) is located on the flange cover plate (3) and is used to connect an external high-pressure gas valve and a compressor to complete the charging, pressure maintenance and deflating of the inner cavity (4) of the flange cover plate; A punching and shearing base plate (6) and a circular gasket (5) are provided between the flange base (9) and the flange cover plate (3); A sealing layer (7) is also provided on the annular gasket (5); A preset crack (8) is provided at the center of the punching and shearing bottom plate (6); A pressure gauge (1) is provided on the flange cover plate (3).

2. The punching and shearing test device for compressed air energy storage sealing layer materials according to claim 1 is characterized in that: The pressure gauge (1) is an electronic pressure gauge with a maximum measuring range of 40 MPa and a measuring accuracy of 0.001 MPa.

3. The punching and shearing test device for compressed air energy storage sealing layer materials according to claim 1 is characterized in that: The flange base (9) is connected to the flange cover plate (3) via a special bolt and nut assembly (10).

4. The punching and shearing test device for compressed air energy storage sealing layer materials according to claim 1 is characterized in that: The flange cover plate inner cavity (4) has a diameter of 15 to 30 cm and a height of 5 to 15 cm, ensuring that the punching and shearing bottom plate (6) has sufficient area to set simulated cracks. The volume of the flange cover plate inner cavity (4) can increase the pressurization rate of the flange cover plate inner cavity (4).

5. The punching and shearing test device for compressed air energy storage sealing layer materials according to claim 1 is characterized in that: The annular gasket (5) is made of metal sealing material, and its inner diameter is consistent with the size of the inner cavity (4) of the flange cover plate. The upper surface is in close contact with the flange cover plate (3), and the lower surface is in close contact with the punching and shearing bottom plate (6), thereby ensuring the airtightness of the inner cavity of the flange cover plate.

6. The punching and shearing test device for compressed air energy storage sealing layer materials according to claim 1, characterized in that: The annular gasket (5) has a thickness of 5 to 15 mm, an inner diameter of 15 to 30 cm, and an outer diameter that is 10 cm greater than the inner diameter.

7. The punching and shearing test device for compressed air energy storage sealing layer materials according to claim 1 is characterized in that: The thickness of the punching and shearing bottom plate (6) and the flange base (9) should meet the existing design pressure requirements to ensure that the deformation of the punching and shearing bottom plate (6) under the action of high-pressure air will not affect the bonding between the sealing layer material (7) and the punching and shearing bottom plate (6).

8. The punching and shearing test device for compressed air energy storage sealing layer materials according to claim 1 is characterized in that: The preset width of the crack (8) is 1 to 20 mm, and the preset length of the crack is 40 to 80 mm.

9. The operating method of the punching and shearing test device for compressed air energy storage sealing layer materials according to any one of claims 1 to 8 is characterized in that: The method includes: S1. Device cleaning and installation: Use a clean rag to clean the stains on the surface of the flange cover plate (3), the annular gasket (5), the punching and shearing bottom plate (6), and the flange base (9), select a punching and shearing bottom plate (6) with a suitable crack width, and install it on the flange base (9); S2. Sealing layer installation: Place the annular gasket (5) on the punching and shearing bottom plate (6) and align it with the punching and shearing bottom plate (6), apply a circle of sealant on the edge of the sealing layer (7), then install the sealing layer (7) in the central circular hole of the annular gasket (5), and compact the sealing layer (7) to ensure that the sealing layer (7) and the punching and shearing bottom plate (6) are in close contact; Among them, S201, the diameter of the sealing layer (7) is slightly smaller than the inner diameter of the annular gasket (5), so as to facilitate the bonding of the sealing layer (7) and the punching and shearing bottom plate; S3. Flange cover installation: Lift the flange cover plate (3) by a hoisting machine, adjust the angle to ensure that it is aligned with the bolt holes of the flange base (9), and connect and fix the flange cover plate and the flange base by a special bolt and nut assembly (10); Among them, S301, when installing the bolts, tighten the bolts step by step in a diagonal order, and use a torque wrench to tighten them according to the specified torque value to ensure that the tightening force of each bolt is uniform; S4. Pressure test and pressure holding test: Connect the test device charging and discharging passage (2) to the compressor pipeline, open the high-pressure gas valve, start the compressor to pressurize the test device, and when the gas pressure in the test device reaches the test design pressure, turn off the compressor, close the high-pressure gas valve, start to maintain pressure, and record the test results; Among them, S401, the pressure holding time of the pressure holding test is 24 to 72 hours. If the pressure of the experimental device can gradually stabilize, it is determined that the sealing layer specimen has passed the pressure holding test; S5, Cyclic high and low pressure test: When the sealing material completes the pressure-maintaining test, the connection between the test device's gas charging and discharging channel (2) and the compressor pipeline is cut off, and then the high-pressure gas valve is slowly opened to start pressure relief; after the pressure is relieved to the specified pressure, the high-pressure gas valve is closed to start pressure maintenance; after the pressure maintenance is completed, the test device's gas charging and discharging channel (2) and the compressor pipeline are connected, the high-pressure gas valve is opened, and the compressor is turned on to pressurize the test device; when the gas pressure in the test device reaches the test design pressure, the compressor is turned off, the high-pressure gas valve is closed, and pressure maintenance is started; the above steps are repeated to complete the cyclic high and low pressure test, and the test results are recorded at the same time; Among them, the pressure holding time in S501 and high and low pressure cycle tests is generally 1 to 2 hours; S6. Open the cover for inspection: Use a bolt wrench to loosen the nut, lift the flange cover (3) using a hoist, check the state of the sealing layer material, and make test records; Among them, S601, the main items for checking the state of the sealing layer material are whether a puncture hole is formed in the sealing layer and the degree of the sealing layer intrusion into the crack.

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