A cryogenic shut-off valve for liquid hydrogen

Abstract

This invention provides a cryogenic shut-off valve for liquid hydrogen, relating to the field of shut-off valve technology. The cryogenic shut-off valve for liquid hydrogen includes a main valve body, with a first pipe connection seat and a second pipe connection seat at each end of the main valve body. An upper connection seat is fixedly connected to the center of the top of the main valve body. A partition structure is fixedly connected inside the main valve body, with limit structures fixedly connected to both sides of the top of the partition structure. A dual valve core structure corresponding to the partition structure is slidably connected to the limit structures. A detachable adjusting valve seat is installed on the top of the upper connection seat, and the upper connection seat and the adjusting valve seat are fixed together by multiple fixing bolts. By designing an integrated dual valve core sealing structure, the two sealing valve cores can simultaneously seal the two valve holes when liquid hydrogen is cut off, thereby further ensuring the sealing performance and reliability of the entire main valve body during the shut-off process, effectively avoiding liquid hydrogen leakage during the sealing process of a single valve core.

Description

Technical Field

[0001] This invention relates to the field of shut-off valve technology, specifically to a cryogenic shut-off valve for liquid hydrogen. Background Technology

[0002] Gate valves are the most widely used and extremely important type of shut-off valve. The sealing of a gate valve is achieved by applying torque to the valve stem, which in turn applies pressure to the valve disc in the axial direction, causing the valve disc sealing surface to fit tightly against the valve seat sealing surface, preventing the medium from leaking along the gap between the sealing surfaces. Gate valves are relatively durable due to the low friction between the sealing surfaces during opening and closing. They also have a small opening height, are easy to manufacture, and are convenient to maintain. They are suitable not only for medium and low pressure but also for high pressure.

[0003] Liquid hydrogen is mostly transported through pipelines, and gate valves are commonly used in these pipelines. Gate valves play a crucial role in cutting off and throttling the medium in their respective pipelines. However, due to the extremely low temperature of liquid hydrogen, and the fact that most conventional gate valves on the market are designed with a single valve core, the valve core is prone to contraction when exposed to cold during actual use. This can easily lead to leakage due to poor valve core sealing, posing a safety hazard during the transport or cut-off of liquid hydrogen.

[0004] To address this, we have developed a new type of cryogenic shut-off valve for liquid hydrogen. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a cryogenic shut-off valve for liquid hydrogen. This solves the problem that conventional shut-off valves are all designed with a single valve core, which makes the valve core prone to contraction when cooled during actual use. This can easily lead to leakage due to poor valve core sealing, thus posing a safety hazard during the transportation or shut-off of liquid hydrogen.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a cryogenic shut-off valve for liquid hydrogen, comprising a main valve body, wherein a first pipe connection seat and a second pipe connection seat are respectively provided at both ends of the main valve body, and an upper connection seat is fixedly connected to the center of the top of the main valve body.

[0007] The main valve body is fixedly connected to a partition structure, and the top two sides of the partition structure are fixedly connected to limit structures. A double valve core structure corresponding to the partition structure is slidably connected to the limit structures.

[0008] A detachable regulating valve seat is installed on the top of the upper connecting seat. The upper connecting seat and the regulating valve seat are fixed together by multiple fixing bolts. A regulating valve rod corresponding to the dual valve core structure is threaded onto the regulating valve seat. An operating handwheel is fixedly connected to the top of the regulating valve rod.

[0009] Preferably, the first pipe connector, the second pipe connector, the upper connector and the main valve body are an integral structure, and the first pipe connector, the second pipe connector and the upper connector are each provided with a plurality of evenly distributed mounting holes.

[0010] Preferably, the partition structure includes a partition plate, and a first valve hole and a second valve hole are respectively opened at the center of the top two sides of the partition plate.

[0011] Through the above technical solution, the partition plate can divide the space inside the main valve body into several cavities, and the cavities are connected to each other through the first valve hole and the second valve hole.

[0012] Preferably, the partition plate has an overall T-shaped structure design, and the partition plate and the main valve body are an integral structure.

[0013] Through the above technical solution, the partition plate with an overall T-shaped structure design can divide the main valve body into three independent cavities, so that the subsequent dual valve core structure can seal the first valve hole and the second valve hole respectively, thereby ensuring the overall sealing performance of the valve body.

[0014] Preferably, the limiting structure includes two first limiting posts and two second limiting posts.

[0015] Preferably, the two first limiting posts and the two second limiting posts are fixed on both sides of the top of the partition plate, and the two first limiting posts and the two second limiting posts are located at the front end and the rear end of the first valve hole and the second valve hole, respectively.

[0016] Through the above technical solution, the two first limiting posts and the two second limiting posts are fixed to the partition plate, which can not only ensure the firmness and stability of the connection, but also play a precise limiting role in the lifting and lowering of the dual valve core structure.

[0017] Preferably, the dual-valve-core structure includes a first fixed seat and a second fixed seat. The front and rear ends of the first fixed seat and the second fixed seat are fixedly connected to fixed ears. Limiting holes are formed in the center of each of the multiple fixed ears. The bottom of the first fixed seat and the second fixed seat are respectively fixedly connected to a first sealing valve core and a second sealing valve core. The top center of the first fixed seat and the second fixed seat are fixedly connected to a mounting seat. A connecting plate is installed on the top between the two mounting seats. The connecting plate is fixed to the two mounting seats by multiple fixing screws. A rotating seat is fixedly connected to the top center of the connecting plate. The bottom end of the adjusting valve rod is rotatably connected to the rotating seat.

[0018] Through the above technical solution, by designing the first sealing valve core and the second sealing valve core separately, the first sealing valve core and the second sealing valve core can simultaneously seal the first valve hole and the second valve hole respectively when liquid hydrogen is cut off. This can further ensure the sealing performance and reliability of the entire main valve body during the cut-off process, effectively avoiding liquid hydrogen leakage during the sealing process of a single valve core. In addition, the first fixed seat and the second fixed seat are connected by a connecting plate, so that the regulating valve rod can drive the first sealing valve core and the second sealing valve core to move up and down synchronously through the rotating seat and the connecting plate, thereby ensuring the synchronicity and stability of the first sealing valve core and the second sealing valve core during the sealing process.

[0019] Preferably, the two sets of fixing ears are respectively sleeved on the outer walls of the two first limiting posts and the two second limiting posts, and the first sealing valve core and the second sealing valve core are respectively positioned in the first valve hole and the second valve hole.

[0020] Through the above technical solution, the two first limiting posts and the two second limiting posts can respectively play a precise limiting role in the lifting and lowering of the first sealing valve core and the second sealing valve core.

[0021] Preferably, the regulating valve seat includes a sealing seat, an annular sealing gasket is installed between the sealing seat and the upper connecting seat, a limiting seat is fixedly connected to the top center of the sealing seat, a sealing sleeve is installed inside the limiting seat, a fixing frame is fixedly connected to the top of the limiting seat, and a threaded seat is provided at the top center of the fixing frame.

[0022] Through the above technical solution, the regulating valve seat can support and limit the regulating valve stem, and the regulating valve stem can be screwed into the threaded seat, thereby driving the regulating valve stem to adjust its height.

[0023] Preferably, the sealing seat is fixedly mounted on the top of the upper connecting seat, and the bottom end of the regulating valve stem passes through the entire regulating valve seat and is threadedly connected to the threaded seat.

[0024] This invention provides a cryogenic shut-off valve for liquid hydrogen. It has the following advantages:

[0025] This cryogenic shut-off valve for liquid hydrogen features an integrated dual-valve-core sealing structure. This allows the two sealing valve cores to simultaneously seal the two valve orifices when liquid hydrogen is cut off, thereby further ensuring the sealing performance and reliability of the entire main valve body during the shut-off process and effectively preventing liquid hydrogen leakage during the sealing process of a single valve core.

[0026] This cryogenic shut-off valve for liquid hydrogen features a dual-core sealing structure and a limiting structure. The dual cores can achieve synchronous and stable sealing when shut off. Compared with traditional shut-off valves, its overall sealing performance is significantly improved, greatly reducing safety hazards during the transportation or shut-off of liquid hydrogen and significantly increasing working efficiency.

[0027] This cryogenic shut-off valve for liquid hydrogen features a simple dual-valve-core structure, which not only makes it easy to manufacture and assemble, but also facilitates subsequent maintenance. Attached Figure Description

[0028] Figure 1 This is a first-view structural diagram of the present invention;

[0029] Figure 2 This is a second-view structural diagram of the present invention;

[0030] Figure 3 This is the front view of the present invention;

[0031] Figure 4 This is a right view of the present invention;

[0032] Figure 5 for Figure 4 Sectional view along line AA;

[0033] Figure 6 This is a schematic diagram of the dual-valve core structure of the present invention;

[0034] Figure 7 for Figure 5 A magnified view of a section at point A in the middle;

[0035] Figure 8 for Figure 5 A magnified view of a section at point B.

[0036] The components include: 1. Main valve body; 2. First pipe connection seat; 3. Second pipe connection seat; 4. Upper connection seat; 5. Partition structure; 501. Partition plate; 502. First valve hole; 503. Second valve hole; 6. Limiting structure; 601. First limiting post; 602. Second limiting post; 7. Double valve core structure; 701. First fixed seat; 702. Second fixed seat; 703. Fixed ear; 704. Limiting hole; 705. First sealing valve core; 706. Second sealing valve core; 707. Mounting seat; 708. Connecting plate; 709. Fixing screw; 710. Rotating seat; 8. Adjusting valve seat; 801. Sealing seat; 802. Annular sealing gasket; 803. Limiting seat; 804. Sealing sleeve; 805. Fixing bracket; 806. Threaded seat; 9. Fixing bolt; 10. Adjusting valve stem; 11. Operating handwheel. Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0038] like Figure 1-8 As shown, this embodiment of the invention provides a cryogenic shut-off valve for liquid hydrogen, including a main valve body 1. The two ends of the main valve body 1 are respectively provided with a first pipe connection seat 2 and a second pipe connection seat 3. An upper connection seat 4 is fixedly connected to the center of the top of the main valve body 1. The first pipe connection seat 2, the second pipe connection seat 3, the upper connection seat 4 and the main valve body 1 are an integral structure. The first pipe connection seat 2, the second pipe connection seat 3 and the upper connection seat 4 are all provided with multiple evenly distributed mounting holes, so as to facilitate the connection and fixation of the liquid hydrogen delivery pipe to the main valve body 1 by bolts.

[0039] like Figure 8 As shown, a partition structure 5 is fixedly connected inside the main valve body 1. The partition structure 5 includes a partition plate 501. A first valve hole 502 and a second valve hole 503 are respectively opened at the center of the top two sides of the partition plate 501. The partition plate 501 can divide the space inside the main valve body 1 into several cavities. The several cavities are connected to each other through the first valve hole 502 and the second valve hole 503. The partition plate 501 has an overall T-shaped structure design and is an integral structure with the main valve body 1. The T-shaped structure design of the partition plate 501 can divide the inside of the main valve body 1 into three independent cavities so that the subsequent dual valve core structure 7 can seal the first valve hole 502 and the second valve hole 503 respectively, thereby ensuring the overall sealing performance of the valve body.

[0040] like Figure 6 As shown, a limiting structure 6 is fixedly connected to both sides of the top of the partition structure 5. The limiting structure 6 includes two first limiting posts 601 and two second limiting posts 602. The two first limiting posts 601 and the two second limiting posts 602 are respectively fixed to both sides of the top of the partition plate 501, and the two first limiting posts 601 and the two second limiting posts 602 are respectively located at the front end and rear end of the first valve hole 502 and the second valve hole 503. By fixing the two first limiting posts 601 and the two second limiting posts 602 to the partition plate 501, the connection can be guaranteed to be firm and stable, and at the same time, it can also play a precise limiting role in the lifting and lowering of the double valve core structure 7.

[0041] like Figure 6As shown, a dual valve core structure 7 corresponding to the partition structure 5 is slidably connected to the limiting structure 6. The dual valve core structure 7 includes a first fixed seat 701 and a second fixed seat 702. The front and rear ends of the first fixed seat 701 and the second fixed seat 702 are fixedly connected to fixed ears 703. Each of the multiple fixed ears 703 has a limiting hole 704 in its center. The two sets of fixed ears 703 are respectively sleeved on the outer walls of the two first limiting posts 601 and the two second limiting posts 602, and the first sealing valve core 705 and the second sealing valve core 706 are also connected. Positioned respectively within the first valve hole 502 and the second valve hole 503, the two first limiting posts 601 and the two second limiting posts 602 can precisely limit the lifting and lowering of the first sealing valve core 705 and the second sealing valve core 706. The bottoms of the first fixing seat 701 and the second fixing seat 702 are respectively fixedly connected to the first sealing valve core 705 and the second sealing valve core 706. The top center of each of the first fixing seat 701 and the second fixing seat 702 is fixedly connected to a mounting seat 707. The space between the two mounting seats 707 is... A connecting plate 708 is installed on the top, and the connecting plate 708 is fixed to the two mounting seats 707 by multiple fixing screws 709. A rotating seat 710 is fixedly connected to the top center of the connecting plate 708. The bottom end of the regulating valve rod 10 is rotatably connected to the rotating seat 710. By designing a first sealing valve core 705 and a second sealing valve core 706 respectively, the first sealing valve core 705 and the second sealing valve core 706 can simultaneously seal the first valve hole 502 and the second valve hole 503 when liquid hydrogen is cut off. This can further ensure the sealing performance and reliability of the entire main valve body 1 during the cut-off process, and effectively avoid the situation of liquid hydrogen leakage during the sealing process of a single valve core. In addition, the first fixing seat 701 and the second fixing seat 702 are connected by the connecting plate 708, so that the regulating valve rod 10 can drive the first sealing valve core 705 and the second sealing valve core 706 to move up and down synchronously through the rotating seat 710 and the connecting plate 708, thereby ensuring the synchronicity and stability of the first sealing valve core 705 and the second sealing valve core 706 during the sealing process.

[0042] like Figure 7 As shown, a detachable regulating valve seat 8 is installed on the top of the upper connecting seat 4. The regulating valve seat 8 includes a sealing seat 801. An annular sealing gasket 802 is installed between the sealing seat 801 and the upper connecting seat 4. A limiting seat 803 is fixedly connected to the top center of the sealing seat 801. A sealing sleeve 804 is installed inside the limiting seat 803. A fixing frame 805 is fixedly connected to the top of the limiting seat 803. A threaded seat 806 is provided at the top center of the fixing frame 805. The sealing seat 801 is fixedly installed on the top of the upper connecting seat 4. The bottom end of the regulating valve rod 10 passes through the entire regulating valve seat 8 and is threadedly connected to the threaded seat 806. The regulating valve seat 8 can support and limit the regulating valve rod 10. At the same time, the regulating valve rod 10 can be screwed on through the threaded seat 806, thereby driving the regulating valve rod 10 to be raised and lowered for adjustment.

[0043] like Figure 6 As shown, the upper connecting seat 4 and the regulating valve seat 8 are fixed together by multiple fixing bolts 9. The regulating valve seat 8 is threaded with a regulating valve rod 10 corresponding to the double valve core structure 7. The top of the regulating valve rod 10 is fixedly connected to an operating handwheel 11.

[0044] Working principle: The liquid hydrogen delivery pipeline is connected and fixed to the first pipeline connecting seat 2 and the second pipeline connecting seat 3 on the main valve body 1 by multiple fixing bolts. During use, the regulating valve rod 10 can be rotated by operating the handwheel 11. This allows the regulating valve rod 10 to drive the first sealing valve core 705 and the second sealing valve core 706 to move synchronously up and down through the rotating seat 710 and the connecting plate 708. The first sealing valve core 705 and the second sealing valve core 706 are used to close and open the first valve hole 502 and the second valve hole 503. Under normal operation, the liquid hydrogen in one end of the delivery pipeline can enter the main valve body 1 through the first pipeline connecting seat 2. The T-shaped structure design of the partition... Plate 501 divides the main valve body 1 into three independent cavities. Liquid hydrogen enters the upper space of the main valve body 1 through the first valve hole 502, then flows out through the second valve hole 503, and finally flows into the delivery pipe at the other end through the second pipe connection seat 3. By designing the first sealing valve core 705 and the second sealing valve core 706 respectively, when it is necessary to cut off the delivery of liquid hydrogen, the first sealing valve core 705 and the second sealing valve core 706 can be driven by adjusting the valve rod 10 to simultaneously block the first valve hole 502 and the second valve hole 503, thereby cutting off the flow of liquid hydrogen and ensuring the sealing and reliability of the entire main valve body 1 during the cutting-off process. This effectively avoids the situation of liquid hydrogen leakage during the sealing process of a single valve core.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cryogenic shut-off valve for liquid hydrogen, comprising a main valve body (1), characterized in that: The main valve body (1) is provided with a first pipe connection seat (2) and a second pipe connection seat (3) at both ends, and an upper connection seat (4) is fixedly connected to the top center of the main valve body (1); The main valve body (1) is fixedly connected to a partition structure (5), and the top two sides of the partition structure (5) are fixedly connected to a limit structure (6), and a double valve core structure (7) corresponding to the partition structure (5) is slidably connected to the limit structure (6). A detachable regulating valve seat (8) is installed on the top of the upper connecting seat (4). The upper connecting seat (4) and the regulating valve seat (8) are fixed by multiple fixing bolts (9). A regulating valve rod (10) corresponding to the double valve core structure (7) is threaded on the regulating valve seat (8). An operating handwheel (11) is fixedly connected to the top of the regulating valve rod (10). The partition structure (5) includes a partition plate (501), and a first valve hole (502) and a second valve hole (503) are respectively opened at the center of the top two sides of the partition plate (501); The dual valve core structure (7) includes a first fixed seat (701) and a second fixed seat (702). The front and rear ends of the first fixed seat (701) and the second fixed seat (702) are fixedly connected with fixed ears (703). The center of each of the multiple fixed ears (703) is provided with a limiting hole (704). The bottom of the first fixed seat (701) and the second fixed seat (702) are respectively fixedly connected with a first sealing valve core (705) and a second sealing valve core (706). The top center of the first fixed seat (701) and the second fixed seat (702) are fixedly connected with a mounting seat (707). A connecting plate (708) is installed on the top between the two mounting seats (707). The connecting plate (708) is fixed to the two mounting seats (707) by multiple fixing screws (709). The top center of the connecting plate (708) is fixedly connected with a rotating seat (710). The bottom end of the regulating valve rod (10) is rotatably connected to the rotating seat (710).

2. The cryogenic shut-off valve for liquid hydrogen according to claim 1, characterized in that: The first pipe connector (2), the second pipe connector (3), the upper connector (4) and the main valve body (1) are an integral structure, and the first pipe connector (2), the second pipe connector (3) and the upper connector (4) are all provided with multiple evenly distributed mounting holes.

3. The cryogenic shut-off valve for liquid hydrogen according to claim 1, characterized in that: The partition plate (501) has an overall T-shaped structure design, and the partition plate (501) and the main valve body (1) are an integral structure.

4. The cryogenic shut-off valve for liquid hydrogen according to claim 1, characterized in that: The limiting structure (6) includes two first limiting posts (601) and two second limiting posts (602).

5. A cryogenic shut-off valve for liquid hydrogen according to claim 4, characterized in that: The two first limiting posts (601) and the two second limiting posts (602) are respectively fixed on both sides of the top of the partition plate (501), and the two first limiting posts (601) and the two second limiting posts (602) are respectively located at the front end and the rear end of the first valve hole (502) and the second valve hole (503).

6. The cryogenic shut-off valve for liquid hydrogen according to claim 5, characterized in that: The two sets of fixing ears (703) are respectively sleeved on the outer walls of the two first limiting posts (601) and the two second limiting posts (602), and the first sealing valve core (705) and the second sealing valve core (706) are respectively positioned in the first valve hole (502) and the second valve hole (503).

7. The cryogenic shut-off valve for liquid hydrogen according to claim 1, characterized in that: The regulating valve seat (8) includes a sealing seat (801), an annular sealing gasket (802) is installed between the sealing seat (801) and the upper connecting seat (4), a limiting seat (803) is fixedly connected to the top center of the sealing seat (801), a sealing sleeve (804) is installed inside the limiting seat (803), a fixing frame (805) is fixedly connected to the top of the limiting seat (803), and a threaded seat (806) is provided at the top center of the fixing frame (805).

8. The cryogenic shut-off valve for liquid hydrogen according to claim 7, characterized in that: The sealing seat (801) is fixed to the top of the upper connecting seat (4), and the bottom end of the regulating valve stem (10) passes through the entire regulating valve seat (8) and is threadedly connected to the threaded seat (806).

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