Manhole and gas injection pipeline structure for artificial cavern gas storage and method of use

Abstract

This invention discloses the structure and usage method of a manhole and gas injection pipeline for an artificial gas storage chamber. It includes a gas storage chamber with a passageway on one side. A manhole and gas injection pipeline are installed within the passageway, forming a bend that connects to the gas storage chamber. The manhole is located below the passageway, and the gas injection pipeline is located above it. A flange tee is installed at one end of the gas injection pipeline passing through the passageway. A connecting pipe is installed at one end of the flange tee, and a blind flange is installed at the other end. This invention, through the manhole, separates the manhole and gas injection pipelines, allowing the sealing door to be installed inside the gas storage chamber. This prevents the manhole from bearing pressure, eliminates the need for designing the manhole wall thickness according to pressure vessel or pressure pipeline specifications, simplifies the bending of thin-walled manholes, facilitates further increases in diameter, and reduces production costs and installation difficulty.

Description

Technical Field

[0001] This invention relates to the field of gas storage manholes and gas injection pipelines, specifically to the structure and usage method of manholes and gas injection pipelines for artificial chamber gas storage facilities. Background Technology

[0002] Artificial chamber gas storage facilities primarily utilize artificially lined chambers as high-pressure air storage containers to store gases. Unlike general underground chambers, these gas-specific artificially lined chambers withstand high internal pressure and high-frequency alternating loads. Manhole pipes are steel passageways for personnel to enter and exit the gas storage facility after its construction. The manhole pipes are embedded in the gas storage facility's sealing structure, with both ends exposed. The end without a sealing door is located on the gas storage side, and the end with a sealing door is located on the access tunnel side. High-pressure gas injection pipes connect to the sidewalls of the manhole pipes. During gas storage pressurization, the pressure in the injection pipes, manhole pipes, and the gas storage facility is the same. The sealing doors in the manhole pipes and access tunnels are also subjected to pressures up to 20 MPa. Therefore, the manhole pipes must be designed in accordance with pressure vessel or pressure pipeline design specifications. Taking a manhole pipe with a diameter of 1.5m as an example, the wall thickness of the manhole pipe designed according to relevant standards is generally greater than 110mm, and the total weight is as high as hundreds of tons; at the same time, the thickness of the sealing door is generally greater than 350mm, and the weight exceeds 10 tons.

[0003] The aforementioned and traditional manhole pipe design and manufacturing methods suffer from significant challenges due to the increased difficulty of bending pipes as diameter and wall thickness increase. For example, bending high-pressure pipes with an inner diameter of 1.5m has become a formidable obstacle in the industry. Furthermore, traditional solutions suffer from high overall costs, difficult on-site installation, and inconvenient disassembly and assembly due to the weight of the sealing doors. Therefore, there is an urgent need to design manhole and gas injection pipe structures for artificial gas storage chambers, along with their usage methods, to address these issues. Summary of the Invention

[0004] The purpose of this invention is to provide the structure and method of using the manhole and gas injection pipeline of the artificial chamber gas storage facility, so as to solve the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The artificial chamber gas storage facility includes a manhole and gas injection pipeline structure, comprising a gas storage tank, a passageway on one side of the gas storage tank, a manhole pipe and a gas injection pipeline installed within the passageway, the manhole pipe and the gas injection pipeline being curved and connected to the gas storage tank, the manhole pipe being located below the passageway, and the gas injection pipeline being located above the passageway; a flange tee is installed at one end of the gas injection pipeline passing through the passageway, a connecting pipe is installed at one end of the flange tee, and a blind flange is installed at the other end of the flange tee; a sealing door is rotatably fitted at the end of the manhole pipe inside the gas storage tank, and a top support mechanism corresponding to the sealing door is installed inside the manhole pipe; a safety ladder corresponding to the gas injection pipeline is installed on one side of the inner wall of the gas storage tank.

[0007] Furthermore, the manhole pipe located inside the gas storage tank does not coincide with the centerline of the gas storage tank, while the gas injection pipe located inside the gas storage tank coincides with the centerline of the gas storage tank. The other ends of both the manhole pipe and the gas injection pipe passing through the traffic tunnel coincide with the centerline of the traffic tunnel. The diameter of the manhole pipe is 1.5m-2m, and the diameter of the gas injection pipe is not less than 0.5m.

[0008] Furthermore, the gas injection pipe is provided with an extension plate corresponding to the top of the safety ladder at one end inside the gas storage tank, a reinforcing frame is provided between the safety ladder and one side of the inner wall of the gas storage tank, and a protective frame is installed on one side of the safety ladder.

[0009] Furthermore, a connecting block is provided on the side of one end of the manhole pipe inside the gas storage tank, and a hinge joint is provided on one side of the sealing door. The connecting block and the hinge joint are hinged together. Multiple fixing holes are provided on one end of the manhole pipe and one side of the sealing door, and the multiple fixing holes are distributed in a circumferential array.

[0010] Furthermore, an arc-shaped plate is provided inside the sealing door, which abuts against the top support mechanism, and a sealing ring corresponding to the manhole pipe is provided on one side of the sealing door.

[0011] Furthermore, the top support mechanism includes a support frame installed inside the manhole pipe, a threaded rod threaded in the support frame, and a support plate rotatably engaged with the threaded rod. Multiple support rods are arranged around the periphery of the support plate, and a pressure sensor is provided at one end of each support rod. The support plate, the multiple support rods, and the multiple pressure sensors abut against one side of the arc-shaped plate.

[0012] Furthermore, the support frame is cross-shaped, with pads provided at all four ends of the support frame, and mounting holes provided at all four ends of the support frame. Mounting bolts are installed in the mounting holes, and the mounting bolts pass through the mounting holes and the pads to connect with the inner wall of the manhole pipe.

[0013] Furthermore, each of the three ends of the flange tee is provided with a flange, and a sealing groove is provided on one side of the flange, with a sealing ring provided inside the sealing groove.

[0014] Furthermore, multiple gas sensors are installed inside the gas injection pipe, and the multiple gas sensors are distributed at equal intervals inside the gas injection pipe.

[0015] The method of using the manhole and gas injection pipeline structure of the artificial chamber gas storage facility, applied to the manhole and gas injection pipeline structure of the artificial chamber gas storage facility described in any of the above-mentioned embodiments, includes the following steps:

[0016] Steps: Clear the site inside the gas storage facility and transport the materials and supplies out of the access tunnel through the manhole pipe;

[0017] Steps: After removing the blind flange, monitor the air environment, then close the sealing door inside the gas storage tank, and fix the sealing door to one end of the manhole pipe by tightening the bolts diagonally;

[0018] Steps: Workers climb up the safety ladder to the gas injection pipe, then climb inside the gas injection pipe to the traffic hole. After climbing out, the workers reinstall the blind flange.

[0019] Steps: Then, the staff enters from one end of the manhole pipe located in the traffic tunnel, moves inside the manhole pipe to the sealing door, and installs the top support mechanism to support and fix the sealing door;

[0020] Step: Then start the external gas injection equipment, so that the external gas injection equipment injects gas into the gas storage tank through the connecting pipe, the flange tee and the gas injection pipe.

[0021] In the above technical solution, the manhole and gas injection pipeline structure and its usage method for the artificial chamber gas storage provided by the present invention have the following beneficial effects:

[0022] By installing manhole pipes, the manhole pipes and gas injection pipes can be separated, allowing the sealing door to be installed inside the gas storage tank. This eliminates the pressure on the manhole pipes, eliminating the need to design the manhole pipe wall thickness according to pressure vessel or pressure pipeline specifications. The thin-walled manhole pipes are easier to bend, facilitating further increases in diameter. The lightweight manhole pipes reduce production costs and installation difficulty. The sealing door, with its curved plate, provides better stress conditions, allowing for thinner sealing door plates. A top support mechanism can be used to provide distributed support for the sealing door. The lightweight design facilitates opening and closing the sealing door, reducing the need for engineering machinery to assist in opening and closing it. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0024] Figure 1 This is a schematic diagram of the manhole and gas injection pipeline structure of the artificial chamber gas storage tank provided in the embodiment of the present invention and its usage method.

[0025] Figure 2 This is a schematic diagram of the traffic tunnel structure provided for an embodiment of the artificial chamber gas storage manhole and gas injection pipeline structure and its usage method of the present invention.

[0026] Figure 3 This is a schematic diagram of a safety ladder structure provided for an embodiment of the manhole and gas injection pipeline structure and its usage method of the artificial chamber gas storage facility of the present invention.

[0027] Figure 4 This is a schematic diagram of the sealing door structure provided in an embodiment of the artificial chamber gas storage tank manhole and gas injection pipeline structure and its usage method of the present invention.

[0028] Figure 5 This is a schematic diagram of the top support mechanism provided in an embodiment of the artificial chamber gas storage manhole and gas injection pipeline structure and its usage method of the present invention.

[0029] Figure 6 This is a schematic diagram of a flange tee structure provided for an embodiment of the manhole and gas injection pipeline structure and its usage method of the artificial chamber gas storage tank of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Gas storage tank; 2. Access tunnel; 3. Manhole pipe; 4. Gas injection pipe; 5. Flange tee; 6. Connecting pipe; 7. Blind flange; 8. Sealing door; 9. Top support mechanism; 10. Safety ladder; 11. Extension plate; 12. Reinforcing frame; 13. Protective frame; 14. Connecting block; 15. Hinge joint; 16. Fixing hole; 17. Curved plate; 18. Sealing ring; 19. Support frame; 20. Threaded rod; 21. Support plate; 22. Support rod; 23. Pressure sensor; 24. Gasket; 25. Mounting hole; 26. Flange; 27. Sealing groove; 28. Sealing ring; 29. ​​Gas sensor. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] like Figure 1-6 As shown, the manhole and gas injection pipeline structure of the artificial chamber gas storage tank provided in this embodiment of the invention.

[0034] The system includes a gas storage tank 1, with a traffic tunnel 2 on one side. A manhole pipe 3 and an injection pipe 4 are installed inside the traffic tunnel 2. The manhole pipe 3 and the injection pipe 4 are connected to the gas storage tank 1 in a bend. The manhole pipe 3 is located at the bottom inside the traffic tunnel 2, and the injection pipe 4 is located at the top inside the traffic tunnel 2. A flange tee 5 is installed at one end of the injection pipe 4 that passes through the traffic tunnel 2. A connecting pipe 6 is installed at one end of the flange tee 5, and a blind flange 7 is installed at the other end of the flange tee 5. A sealing door 8 is rotatably fitted at the end of the manhole pipe 3 inside the gas storage tank 1. A top support mechanism 9 corresponding to the sealing door 8 is installed inside the manhole pipe 3. A safety ladder 10 corresponding to the injection pipe 4 is installed on one side of the inner wall of the gas storage tank 1.

[0035] Reference Figure 2 In this embodiment, the manhole pipe 3, located inside the gas storage tank 1, does not coincide with the centerline of the gas storage tank 1. The injection pipe 4, located inside the gas storage tank 1, does not coincide with the centerline of the gas storage tank 1. The other ends of both the manhole pipe 3 and the injection pipe 4, passing through the access tunnel 2, coincide with the centerline of the access tunnel 2. The diameter of the manhole pipe 3 is 2m, and the diameter of the injection pipe 4 is not less than 0.5m. By ensuring that the other end of the manhole pipe 3 does not coincide with the centerline of the gas storage tank 1, the design reduces the impact of the manhole pipe 3 installation on the passageway to and from the gas storage tank 1, ensuring that the manhole pipe 3 and the injection pipe 4 do not interfere with each other.

[0036] Reference Figure 3In this embodiment, the gas injection pipe 4 located inside the gas storage tank 1 has an extension plate 11 corresponding to the top of the safety ladder 10 at one end. A reinforcing frame 12 is provided between the safety ladder 10 and one side of the inner wall of the gas storage tank 1, and a protective frame 13 is installed on one side of the safety ladder 10. The extension plate 11 allows workers to easily climb into the gas injection pipe 4 when they reach the top of the safety ladder 10. The reinforcing frame 12 supports and fixes the safety ladder 10, and the protective frame 13 protects the workers climbing the safety ladder 10.

[0037] Reference Figure 4 In this embodiment, a connecting block 14 is provided on the side of one end of the manhole pipe 3 inside the gas storage tank 1, and a hinge joint 15 is provided on one side of the sealing door 8. The connecting block 14 and the hinge joint 15 are hinged together. Multiple fixing holes 16 are provided on one end of the manhole pipe 3 and one side of the sealing door 8, and the multiple fixing holes 16 are distributed in a circumferential array. Through the connecting block 14, the sealing door 8 rotates through the hinge joint 15 and the connecting block 14, so that the connecting block 14 supports the sealing door 8, and the sealing door 8 rotates at one end of the manhole pipe 3. After the sealing door 8 rotates and fits against one end of the manhole pipe 3, bolts are used to pass through the corresponding two fixing holes 16 to fix the sealing door 8.

[0038] Reference Figure 4 In this embodiment, an arc-shaped plate 17 is provided inside the sealing door 8. The arc-shaped plate 17 abuts against the top support mechanism 9. A sealing ring 18 corresponding to the manhole pipe 3 is provided on one side of the sealing door 8. Through the provided arc-shaped plate 17, when the sealing door 8 is fixed to one end of the manhole pipe 3, the arc-shaped plate 17 enters the manhole pipe 3, so that the top support mechanism 9 supports the arc-shaped plate 17, and the sealing ring 18 can seal the connection between the sealing door 8 and the manhole pipe 3.

[0039] Reference Figure 5 The top support mechanism 9 in this embodiment includes a support frame 19 installed inside the manhole pipe 3, a threaded rod 20 threadedly fitted inside the support frame 19, and a support plate 21 rotatably fitted to the threaded rod 20. Multiple support rods 22 are arranged around the periphery of the support plate 21, and a pressure sensor 23 is installed at one end of each support rod 22. The support plate 21, the multiple support rods 22, and the multiple pressure sensors 23 abut against one side of the arc-shaped plate 17. The support frame 19 can be installed inside the manhole pipe 3, aligning the manhole pipe 3 with the arc-shaped plate 17. Rotating the threaded rod 20 moves the support plate 21, causing the support plate 21 to drive the support rods 22 to abut against the arc-shaped plate 17. The pressure sensors 23 monitor the stress distribution of the arc-shaped plate 17.

[0040] Reference Figure 5In this embodiment, the support frame 19 is cross-shaped, with pads 24 at each of its four ends and mounting holes 25 at each end. Mounting bolts are installed in the mounting holes 25, passing through the mounting holes 25 and the pads 24 to connect with the inner wall of the manhole pipe 3. The pads 24 allow the four ends of the support frame 19 to abut against the inner wall of the manhole pipe 3, facilitating installation and allowing the support frame 19 to move within the manhole pipe 3 after disassembly.

[0041] Reference Figure 6 In this embodiment, the flange tee 5 is provided with flanges 26 at all three ends. A sealing groove 27 is provided on one side of the flange 26, and a sealing ring 28 is provided inside the sealing groove 27. Through the flanges 26, the flanges 26 can be connected to the air injection pipe 4, the connecting pipe 6 and the blind flange 7, so that the sealing ring 28 placed in the sealing groove 27 can be sealed.

[0042] Reference Figure 6 In this embodiment, multiple gas sensors 29 are installed inside the gas injection pipe 4, and these gas sensors 29 are distributed at equal intervals within the gas injection pipe 4. The gas sensors 29 monitor the air conditions within the gas injection pipe 4, and determine the working environment within the gas storage tank 1 based on the air conditions inside the gas injection pipe 4, enabling workers to operate safely and preventing accidents in confined spaces.

[0043] This invention provides a method for using the manhole and gas injection pipeline structure of an artificial chamber gas storage facility, applicable to the manhole and gas injection pipeline structure of the artificial chamber gas storage facility in any of the above embodiments, including the following steps:

[0044] Step 1: Clean up the site inside the gas storage 1 and transport the materials and supplies out of the access tunnel 2 through the manhole pipe 3;

[0045] Step 2: After removing the blind flange 7, monitor the air environment, then close the sealing door 8 inside the gas storage tank 1, and fix the sealing door 8 to one end of the manhole pipe 3 by tightening the bolts diagonally.

[0046] Step 3: The staff climbed up the safety ladder 10 to the gas injection pipe 4, and then climbed up to the traffic hole 2 inside the gas injection pipe 4. After the staff climbed out, they reinstalled the blind flange 7.

[0047] Step 4: Then the staff enters from one end of the manhole pipe 3 located in the traffic tunnel 2, moves inside the manhole pipe 3 to the sealing door 8, and installs the top support mechanism 9 to support and fix the sealing door 8;

[0048] Step 5: Then start the external gas injection equipment, so that the external gas injection equipment injects gas into the gas storage tank 1 through the connecting pipe 6, flange tee 5 and gas injection pipe 4.

[0049] Working principle: In use, firstly, rotate and close the sealing door 8 inside the gas storage tank 1 to seal the sealing door 8 against one end of the manhole pipe 3. Then, use the fixing hole 16 to fix the sealing door 8. After fixing, personnel climb up the safety ladder 10 to the gas injection pipe 4. The blind flange 7 is removed from the outside in advance so that personnel can pass through the gas injection pipe 4. After crawling a distance inside the gas injection pipe 4, they crawl out from one end of the flange tee 5. Then, the blind flange 7 is reinstalled, and personnel enter from the outside end of the manhole pipe 3 and walk to the sealing door 8 of the manhole pipe 3. The top support mechanism 9 is installed and fixed so that the top support mechanism 9 supports the sealing door 8. After checking that everything is safe, the connecting pipe 6 can transport external gas through the gas injection pipe 4 to inject gas into the gas storage tank 1 for storage.

[0050] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions 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 manhole and gas injection pipeline structure for an artificial chamber gas storage facility, comprising a gas storage tank (1), characterized in that, A traffic tunnel (2) is provided on one side of the gas storage tank (1). A manhole pipe (3) and an injection pipe (4) are provided in the traffic tunnel (2). The manhole pipe (3) and the injection pipe (4) are connected to the gas storage tank (1) in a bend. The manhole pipe (3) is located below the traffic tunnel (2), and the injection pipe (4) is located above the traffic tunnel (2). A flange tee (5) is provided at one end of the injection pipe (4) that passes through the traffic tunnel (2). A connecting pipe (6) is installed at one end of the flange tee (5), and a blind plate (7) is installed at the other end of the flange tee (5). A sealing door (8) is rotatably fitted at one end of the manhole pipe (3) that is located in the gas storage tank (1). A top support mechanism (9) corresponding to the sealing door (8) is provided in the manhole pipe (3). A safety ladder (10) corresponding to the injection pipe (4) is provided on one side of the inner wall of the gas storage tank (1).

2. The manhole and gas injection pipeline structure for an artificial chamber gas storage facility according to claim 1, characterized in that, The manhole pipe (3) is located inside the gas storage tank (1) at one end, which does not coincide with the centerline of the gas storage tank (1). The gas injection pipe (4) is located inside the gas storage tank (1) at one end, which coincides with the centerline of the gas storage tank (1). The other ends of the manhole pipe (3) and the gas injection pipe (4) passing through the traffic tunnel (2) both coincide with the centerline of the traffic tunnel (2). The diameter of the manhole pipe (3) is 1.5m-2m, and the diameter of the gas injection pipe (4) is not less than 0.5m.

3. The manhole and gas injection pipeline structure for an artificial chamber gas storage facility according to claim 1, characterized in that, The gas injection pipe (4) is provided with an extension plate (11) at one end inside the gas storage tank (1) that corresponds to the top of the safety ladder (10). A reinforcing frame (12) is provided between the safety ladder (10) and one side of the inner wall of the gas storage tank (1). A protective frame (13) is installed on one side of the safety ladder (10).

4. The manhole and gas injection pipeline structure for an artificial chamber gas storage facility according to claim 1, characterized in that, The manhole pipe (3) is provided with a connecting block (14) on one side of the gas storage tank (1), and a hinge joint (15) is provided on one side of the sealing door (8). The connecting block (14) and the hinge joint (15) are hinged together. Both one end of the manhole pipe (3) and one side of the sealing door (8) are provided with multiple fixing holes (16), and the multiple fixing holes (16) are distributed in a circumferential array.

5. The manhole and gas injection pipeline structure for an artificial chamber gas storage facility according to claim 1, characterized in that, An arc-shaped plate (17) is provided inside the sealing door (8), and the arc-shaped plate (17) abuts against the top support mechanism (9). A sealing ring (18) corresponding to the manhole pipe (3) is provided on one side of the sealing door (8).

6. The manhole and gas injection pipeline structure for an artificial chamber gas storage facility according to claim 5, characterized in that, The top support mechanism (9) includes a support frame (19) installed in the manhole pipe (3), a threaded rod (20) threaded in the support frame (19), and a support plate (21) rotatably connected to the threaded rod (20). Multiple support rods (22) are provided around the support plate (21). A pressure sensor (23) is provided at one end of each support rod (22). The support plate (21), the multiple support rods (22), and the multiple pressure sensors (23) abut against one side of the arc plate (17).

7. The manhole and gas injection pipeline structure for an artificial chamber gas storage facility according to claim 6, characterized in that, The support frame (19) is cross-shaped, and each of the four ends of the support frame (19) is provided with a pad (24). Each of the four ends of the support frame (19) is provided with a mounting hole (25). A mounting bolt is provided in the mounting hole (25). The mounting bolt passes through the mounting hole (25) and the pad (24) and connects to the inner wall of the manhole pipe (3).

8. The manhole and gas injection pipeline structure for an artificial chamber gas storage facility according to claim 1, characterized in that, The flange tee (5) is provided with flanges (26) at all three ends. A sealing groove (27) is provided on one side of the flange (26), and a sealing ring (28) is provided in the sealing groove (27).

9. The manhole and gas injection pipeline structure for an artificial chamber gas storage facility according to claim 1, characterized in that, Multiple gas sensors (29) are installed inside the gas injection pipe (4), and the multiple gas sensors (29) are distributed at equal intervals inside the gas injection pipe (4).

10. A method of using a manhole and gas injection pipeline structure for an artificial chamber gas storage facility, applied to the manhole and gas injection pipeline structure for an artificial chamber gas storage facility as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Clean the site inside the gas storage tank (1) and transport the materials and supplies out of the traffic tunnel (2) through the manhole pipe (3); Step 2: After removing the blind plate (7), monitor the air environment, then close the sealing door (8) inside the gas storage tank (1), and fix the sealing door (8) to one end of the manhole pipe (3) by tightening the bolts diagonally; Step 3: The staff climbs up the safety ladder (10) to the air injection pipe (4), climbs up the air injection pipe (4) to the traffic hole (2), and after climbing out, the staff reinstalls the blind plate (7). Step 4: Then the staff enters from one end of the manhole pipe (3) located in the traffic tunnel (2), moves to the sealing door (8) inside the manhole pipe (3), and installs the top support mechanism (9) to support and fix the sealing door (8); Step 5: Then start the external gas injection equipment, so that the external gas injection equipment injects gas into the gas storage tank (1) through the connecting pipe (6), the flange tee (5) and the gas injection pipe (4).

Images