Ball valve applied to hydrogen energy

Abstract

The utility model relates to the technical field of ball valves, and discloses a ball valve applied to hydrogen energy, which comprises a valve body, a valve rod is arranged in the middle of an inner cavity of the valve body, connecting pieces are fixedly connected to two sides of the inner cavity of the valve body, a disc spring is sleeved on one side of the outer surface of each connecting piece, and a sealing block is fixedly connected to one end, close to the valve rod, of each connecting piece. A reinforcing ring is fixedly connected to the end, close to the valve rod, of the sealing block, a sealing ring is fixedly connected to an inner cavity of the sealing block, and a handle used for controlling opening and closing of the ball valve is fixedly connected to the top end of the valve rod. Through the sealing structure of the disc spring and the O-shaped ring, the valve body and the valve rod are sealed, internal leakage and external leakage of the valve body are prevented, meanwhile, all sealing faces are tightly attached, the sealing performance is better, the valve is particularly suitable for the small molecular structure of hydrogen, the handle can rotate in the horizontal direction and the right-angle direction, and rapid on-off can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, and more particularly to a ball valve applied to hydrogen energy. Background Art

[0002] Hydrogen energy, the chemical energy released by the chemical reaction of hydrogen and oxygen, is a secondary clean energy source. High-pressure gaseous hydrogen storage is the most commonly used hydrogen storage method and the most mature hydrogen storage technology. Hydrogen is compressed and stored in the form of gas in cylinders. During the storage and transportation of hydrogen energy, hydrogen ball valves are usually used to control the flow direction and flow rate of hydrogen. Ball valves are a common component in hydrogen systems and are used to start and stop the flow of hydrogen from one direction to another.

[0003] The shortcomings of the existing technology: Since hydrogen molecules are extremely small and prone to leakage, posing a safety hazard, the ball valves in the existing technology are not sufficiently tight to seal hydrogen. When the sealing ball rotates, gaps will be created, causing hydrogen leakage. At the same time, hydrogen is a flammable and explosive gas, and hydrogen compressors are exposed to a strong vibration environment. Therefore, high requirements are placed on the seismic resistance of joints and valves to avoid accidents such as explosions caused by hydrogen leakage. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a ball valve for hydrogen energy, so as to solve the problem in the above-mentioned background technology that the sealing performance of the ball valve in the prior art is not sufficient to bear the sealing of hydrogen, and has high requirements on the seismic resistance of the joints and valves.

[0005] The utility model provides the following technical solution: a ball valve applied to hydrogen energy, comprising a valve body, a valve stem provided in the middle of an inner cavity of the valve body, connecting pieces provided on both sides of the inner cavity of the valve body, a disc spring sleeved on one side of an outer surface of the connecting piece, a sealing block fixedly connected to one end of the connecting piece close to the valve stem, a reinforcement ring fixedly connected to one end of the sealing block close to the valve stem, and a sealing ring fixedly connected to the inner cavity of the sealing block.

[0006] Preferably, a shaft seat is fixedly installed in the middle of the top end of the valve body, the valve stem passes through the center axis of the inner cavity of the shaft seat, and the top end of the valve stem is fixedly connected to a handle for controlling the switch of the ball valve.

[0007] Preferably, both left and right ends of the valve body are fixedly connected with connecting blocks, the end of the connecting block away from the valve body is fixedly connected with a mounting ring, the bottom end of the valve stem is fixedly connected with a connecting rod, and the bottom end of the connecting rod is fixedly connected with a sealing ball.

[0008] Preferably, the two connecting pieces are located on both sides of the sealing ball, the positions of the connecting pieces correspond to the positions of the connecting blocks, and the ends of the connecting pieces away from the sealing ball are inserted into the central axis of the inner cavity of the connecting block.

[0009] Preferably, the reinforcement ring is in contact with the surface of the sealing ball, and the disc spring is located between the sealing block and the connecting block.

[0010] Preferably, two O-rings are provided at equal distances at the connection between the valve body and the valve stem, and O-rings are provided at the connections between the connecting block, the valve body and the connecting piece.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The utility model ensures the sealing performance of the sealing ball by providing a multi-layer sealing structure. The installation position between the valve body and the sealing ball is first determined by a connecting piece, and a clamping structure is adopted on the left and right sides. The sealing is carried out by the internal and external sealing structures to provide double protection, so that the sealing ball adopts a floating type, which increases the sealing reliability of the ball valve and extends the valve cycle life. The sealing ball and the inner wall of the valve body are sealed by a reinforcement ring. At the same time, a sealing ring with a matching shape is added to the gap between the reinforcement ring and the sealing ball to avoid gaps when the sealing ball rotates. A disc spring and an O-ring sealing structure are used to seal the connection surface position inside the valve body to prevent internal and external leakage of the ball valve body, which may lead to hydrogen leakage.

[0013] The utility model controls the opening and closing of the ball valve by providing a handle, which can be rotated in both horizontal and right-angle directions, so as to realize the rapid opening and closing of the ball valve. At the same time, the valve body, valve stem and other structures are all made of high-nickel stainless steel, which can effectively prevent hydrogen embrittlement. Since the hydrogen compressor is accompanied by a strong vibration environment, high requirements are placed on the seismic resistance of the joints and valves. The stability and firmness of the valve installation are guaranteed by the mounting ring, and the tightness of the valve is ensured by the connecting block. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall cross-sectional structure of the present utility model.

[0015] Figure 2 The overall structure of the utility model is shown in FIG. Figure 1 .

[0016] Figure 3 The overall structure of the utility model is shown in FIG. Figure 2 .

[0017] Figure 4 For the utility model Figure 1 A magnified schematic diagram of the structure in the middle.

[0018] The figures are marked as follows: 1. valve body; 2. connecting block; 3. mounting ring; 4. shaft seat; 5. valve stem; 6. handle; 7. connecting rod; 8. sealing ball; 9. connecting piece; 10. disc spring; 11. sealing block; 12. reinforcement ring; 13. sealing ring; 14. O-ring. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples. The ball valve for hydrogen energy involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] The utility model provides a ball valve for hydrogen energy, such as Figure 1 - Figure 4 As shown, it includes a valve body 1, a valve stem 5 is provided in the middle of the inner cavity of the valve body 1, connecting parts 9 are provided on both sides of the inner cavity of the valve body 1, a disc spring 10 is sleeved on one side of the outer surface of the connecting part 9, and a sealing block 11 is fixedly connected to the end of the connecting part 9 close to the valve stem 5, and a reinforcement ring 12 is fixedly connected to the end of the sealing block 11 close to the valve stem 5. A sealing ring 13 is fixedly connected to the inner cavity of the sealing block 11, and a multi-layer sealing structure is adopted to seal the valve body 1 to increase the sealing performance of the valve body 1, so that the ball valve can be suitable for hydrogen with a smaller molecular structure.

[0021] Further, such as Figure 1 As shown, a shaft seat 4 is fixedly installed in the middle of the top of the valve body 1, and a valve stem 5 passes through the central axis of the inner cavity of the shaft seat 4. A handle 6 for controlling the switch of the ball valve is fixedly connected to the top of the valve stem 5. The stability of the valve stem 5 is increased by the shaft seat 4. The handle 6 can be rotated in both horizontal and right-angle directions to realize the rapid opening and closing of the ball valve. At the same time, the valve body 1, valve stem 5 and other structures are all made of high-nickel stainless steel, which can effectively prevent hydrogen embrittlement.

[0022] Further, such as Figure 1 As shown, the left and right ends of the valve body 1 are fixedly connected with connecting blocks 2, and the end of the connecting block 2 away from the valve body 1 is fixedly connected with a mounting ring 3. Since the hydrogen compressor is accompanied by a strong vibration environment, high requirements are placed on the seismic resistance of the joint and the valve. The stability and firmness of the valve installation are ensured by the mounting ring 3, and the tightness of the valve is ensured by the connecting block 2. The bottom end of the valve stem 5 is fixedly connected with a connecting rod 7, and the bottom end of the connecting rod 7 is fixedly connected with a sealing ball 8, so that the sealing ball 8 is suspended in the middle of the inner cavity of the valve body 1. The sealing ball 8 adopts a floating type, which increases the sealing reliability of the ball valve and extends the valve cycle life.

[0023] Further, such as Figure 1 and Figure 4 As shown, two connectors 9 are located on both sides of the sealing ball 8. The position of the connector 9 corresponds to the position of the connecting block 2. The end of the connector 9 away from the sealing ball 8 is inserted into the central axis of the inner cavity of the connecting block 2. The left and right sides adopt a clamping structure and are sealed by the internal and external sealing structures for double protection.

[0024] Further, such as Figure 4 As shown, the reinforcement ring 12 is fitted with the surface of the sealing ball 8, and the disc spring 10 is located between the sealing block 11 and the connecting block 2. The disc spring 10 acts as a compensation to make the various sealing surfaces tightly fitted, with better sealing performance, and is more suitable for gases with small molecular structures such as hydrogen.

[0025] Further, such as Figure 1 As shown, two O-rings 14 are equidistantly provided at the connection between the valve body 1 and the valve stem 5, and O-rings 14 are provided at the connection between the connecting block 2 and the valve body 1 and the connecting piece 9. The O-ring 14 adopts a polytetrafluoroethylene gasket structure, and adopts a disc spring 10 and an O-ring 14 sealing structure to seal the connection surface position inside the valve body 1 to prevent internal and external leakage of the ball valve body.

[0026] The working principle of the utility model is as follows: first, insert the end of the connecting piece 9 away from the sealing ball 8 into the inner axis of the connecting block 2, and adopt a clamping structure on the left and right to fix the position of the sealing ball 8. The valve stem 5 passes through the shaft seat 4 and the middle of the valve body 1 and is fixedly connected to the top of the sealing ball 8, so that the sealing ball 8 is floating, which increases the sealing reliability of the ball valve and prolongs the valve cycle life. The outer surface of the sealing ball 8 is provided with a sealing block 11 and a reinforcement ring 12, which are sealed by the internal and external sealing structures for double protection. The multi-layer sealing structure is used to seal the valve body 1, which increases the sealing performance of the valve body 1, so that the ball valve can be applied to hydrogen with a smaller molecular structure. At the same time, the valve body 1 and the valve The rod 5 and other structures are all made of high-nickel stainless steel, which can effectively prevent hydrogen embrittlement. Since the hydrogen compressor is accompanied by a strong vibration environment, there are high requirements for the seismic resistance of the joints and valves. The stability and firmness of the valve installation are guaranteed by the mounting ring 3, and the tightness of the valve is ensured by the connecting block 2. The connection surface position inside the valve body 1 is sealed with a disc spring 10 and an O-ring 14 sealing structure. The disc spring 10 acts as a compensation to make the various sealing surfaces tightly attached, and the sealing is better, preventing the ball valve body from internal and external leakage. When in use, the handle 6 is rotated in both horizontal and right-angle directions to control the rotation of the sealing ball 8 to achieve rapid on and off of the ball valve.

[0027] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0028] Secondly: The drawings of the embodiments disclosed in this utility model only involve structures related to the embodiments disclosed in this utility model. Other structures can refer to common designs. In the absence of conflicts, the same embodiment and different embodiments of the utility model can be combined with each other.

[0029] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A ball valve for hydrogen energy, comprising a valve body (1), wherein a valve stem (5) is provided in the middle of an inner cavity of the valve body (1), and characterized in that: Connecting pieces (9) are provided on both sides of the inner cavity of the valve body (1), a disc spring (10) is sleeved on one side of the outer surface of the connecting piece (9), a sealing block (11) is fixedly connected to one end of the connecting piece (9) close to the valve stem (5), a reinforcing ring (12) is fixedly connected to one end of the sealing block (11) close to the valve stem (5), and a sealing ring (13) is fixedly connected to the inner cavity of the sealing block (11).

2. A ball valve for hydrogen energy application according to claim 1, characterized in that: A shaft seat (4) is fixedly mounted at the middle of the top end of the valve body (1), the valve stem (5) passes through the center axis of the inner cavity of the shaft seat (4), and a handle (6) for controlling the opening and closing of the ball valve is fixedly connected to the top end of the valve stem (5).

3. A ball valve for hydrogen energy application according to claim 1, characterized in that: The left and right ends of the valve body (1) are fixedly connected to connecting blocks (2), the end of the connecting block (2) away from the valve body (1) is fixedly connected to a mounting ring (3), the bottom end of the valve stem (5) is fixedly connected to a connecting rod (7), and the bottom end of the connecting rod (7) is fixedly connected to a sealing ball (8).

4. A ball valve for hydrogen energy application according to claim 1, characterized in that: The two connecting pieces (9) are located on both sides of the sealing ball (8), and the positions of the connecting pieces (9) correspond to the positions of the connecting block (2). The end of the connecting piece (9) away from the sealing ball (8) is inserted into the central axis of the inner cavity of the connecting block (2).

5. The ball valve for hydrogen energy application according to claim 1, characterized in that: The reinforcement ring (12) is in contact with the surface of the sealing ball (8), and the disc spring (10) is located between the sealing block (11) and the connecting block (2).

6. The ball valve for hydrogen energy application according to claim 3, characterized in that: Two O-rings (14) are provided at equal distances at the connection between the valve body (1) and the valve stem (5), and O-rings (14) are provided at the connection between the connection block (2), the valve body (1) and the connecting piece (9).

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