A metal hard-seal ball valve

Abstract

This utility model discloses a metal hard-seal ball valve, including a valve body, a connecting flange on one side of the valve body, a sealing mechanism on the other side of the connecting flange, a connecting valve stem rotatably connected to the upper end of the valve body, a handle fixed to the upper end of the connecting valve stem, a ball core inserted into the lower end of the connecting valve stem, a valve cover bolted to the other side of the valve body, a wear-resistant mechanism threadedly connected to the side of the valve cover near the ball core, and a bottom valve stem rotatably connected to the lower end of the valve body. The sealing mechanism ensures that the device maintains good sealing performance even after prolonged use, effectively preventing leakage. The mounting groove allows the sealing gasket to be securely installed on the connecting flange; the wear-resistant mechanism ensures that the device maintains good wear resistance even after prolonged use, greatly reducing the risk of leakage due to wear.

Description

Technical Field

[0001] This utility model relates to the field of sealing ball valve technology, specifically a metal hard-seal ball valve. Background Technology

[0002] A ball valve is a type of valve in which the opening and closing element is a ball driven by a valve stem and rotates around the axis of the ball valve. With the rapid development of science and technology and the continuous improvement of production processes and product structures, ball valves have rapidly developed into a major type of valve. The use of ball valves is increasing year by year. Ball valves are widely used in industries such as petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmaceutical industry, water conservancy, power, municipal engineering, and steel.

[0003] Patent CN113294549B discloses a two-stage metal hard-seal ball valve, comprising: a valve body, a ball, and a drive component. The ball is disposed inside the valve body and is used to control the on / off state of the valve body. The drive component is disposed on the valve body and is used to drive the ball to rotate in one direction. A sealing valve seat is disposed inside the valve body, and the ball is rotatably disposed inside the sealing valve seat. The two ends of the sealing valve seat are mounted in mounting grooves on the valve body through metal sealing gaskets. A valve stem is disposed on the ball. The drive component includes a transmission component and a one-way component. The transmission component is drively connected to the valve stem, and the transmission component is connected to the one-way component.

[0004] Currently, traditional metal hard-seal ball valves have several drawbacks in practical applications. They cannot be installed stably and tightly, and are inconvenient for installers to operate. In addition, the sealing effect at the connection is poor and the wear at the connection is significant, which increases production costs and maintenance time. Utility Model Content

[0005] The purpose of this utility model is to provide a metal hard-seal ball valve to solve the problems mentioned in the background art, such as the inability to install the ball valve stably and tightly in actual application, the inconvenience of operation for installers, the poor sealing effect at the connection when using the ball valve, and the large wear at the connection, which increases production costs and maintenance time.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a metal hard-seal ball valve, comprising a valve body, a connecting flange on one side of the valve body, a sealing mechanism on the other side of the connecting flange, a connecting valve stem rotatably connected to the upper end of the valve body, a handle fixedly connected to the upper end of the connecting valve stem, a ball core inserted into the lower end of the connecting valve stem, a valve cover bolted to the other side of the valve body, a wear-resistant mechanism threadedly connected to the side of the valve cover near the ball core, and a bottom valve stem rotatably connected to the lower end of the valve body;

[0007] The sealing mechanism includes a mounting groove, the outer wall of which is embedded and connected to the other side of the connecting flange. A baffle is provided on one side of the interior of the mounting groove, and a connecting plate is provided on one side of the baffle. A buckle is fixed to the side of the connecting plate near the mounting groove, and a sealing gasket is adhered to the other side of the buckle.

[0008] Preferably, one side of the connecting flange is fixedly connected to one side of the valve body, and the other side of the connecting flange is detachably connected to one side of the sealing mechanism.

[0009] Preferably, one side of the inner wall of the mounting groove is fixedly connected to the outer wall of the baffle, and one side of the baffle is in close contact with one side of the connecting plate.

[0010] Preferably, the connecting plate is embedded in the mounting groove and the buckle extends into the mounting groove via a baffle.

[0011] Preferably, the wear-resistant mechanism includes a valve seat, the outer wall of which is threadedly connected to the inner wall of one side of the valve cover, the outer wall of which is provided with an external thread, a movable groove is provided on one side of which a spring is fixedly connected to one side of the inner wall of the movable groove, and a graphite ring is threadedly connected to the inner wall of the valve seat.

[0012] Preferably, the outer wall of the valve seat is provided with external threads, and one side of the valve seat is embedded and connected to the outer wall of the movable groove.

[0013] Preferably, the number of springs is eight, all of which are distributed in a ring at equal intervals on one side of the inner wall of the movable groove, and the other side of the springs is in close contact with one side of the valve cover.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The sealing mechanism ensures that the equipment maintains good sealing performance even after prolonged use, effectively preventing leakage. The mounting groove allows the gasket to be securely installed on the connecting flange, while the snap-fit ​​design further enhances the gasket's stability, preventing seal failure due to vibration or pressure changes. This also significantly extends the service life of the ball valve. The graphite ring on the valve seat not only has excellent wear resistance but also maintains stable lubrication under harsh environments such as high temperature and high pressure. The spring design ensures that the graphite ring remains tightly against the ball center, maintaining good sealing performance even after prolonged use. In addition, the movable groove facilitates the replacement and maintenance of the graphite ring, reducing maintenance costs and time.

[0016] 2. The wear-resistant mechanism ensures the equipment maintains excellent wear resistance even after prolonged use, significantly reducing the risk of leakage due to wear. The valve seat is made of high-strength material, possessing excellent wear and corrosion resistance, capable of withstanding significant fluid pressure and impact. Simultaneously, the external threads on the valve seat tightly engage with the threads on the inner wall of the valve cover, effectively preventing fluid leakage. The graphite ring, a key component of the wear-resistant mechanism, provides excellent self-lubricating and wear-resistant properties, ensuring smooth operation of the ball valve during opening and closing, reducing frictional resistance and wear. Furthermore, the spring not only keeps the graphite ring firmly against the ball center, guaranteeing a seal, but also allows for appropriate compression and release of the graphite ring during valve opening and closing, further extending its service life. Attached Figure Description

[0017] Figure 1 This is an exploded three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the sealing mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the wear-resistant mechanism of this utility model;

[0020] Figure 4 This is a side view of the three-dimensional structure of this utility model.

[0021] In the diagram: 1. Valve body; 2. Connecting flange; 3. Sealing mechanism; 4. Connecting valve stem; 5. Handle; 6. Ball; 7. Valve cover; 8. Wear-resistant mechanism; 9. Bottom valve stem; 31. Mounting groove; 32. Baffle; 33. Connecting plate; 34. Snap-fit; 35. Sealing gasket; 81. Valve seat; 82. External thread; 83. Movable groove; 84. Spring; 85. Graphite ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1 and Figure 4This utility model provides a technical solution: a metal hard-seal ball valve, including a valve body 1, a connecting flange 2 on one side of the valve body 1, a sealing mechanism 3 on the other side of the connecting flange 2, a connecting valve stem 4 rotatably connected to the upper end of the valve body 1, a handle 5 fixedly connected to the upper end of the connecting valve stem 4, a ball core 6 inserted into the lower end of the connecting valve stem 4, a valve cover 7 bolted to the other side of the valve body 1, a wear-resistant mechanism 8 threadedly connected to the side of the valve cover 7 near the ball core 6, a bottom valve stem 9 rotatably connected to the lower end of the valve body 1, the sealing mechanism 3 including an installation groove 31, the outer wall of the installation groove 31 embedded and connected to the other side of the connecting flange 2, a baffle 32 provided on one side of the interior of the installation groove 31, a connecting plate 33 provided on one side of the baffle 32, a buckle 34 fixedly connected to the side of the connecting plate 33 near the installation groove 31, a sealing gasket 35 adhered to the other side of the buckle 34, one side of the connecting flange 2 fixedly connected to one side of the valve body 1, and the other side of the connecting flange 2 detachably connected to one side of the sealing mechanism 3;

[0024] A connecting flange 2 is provided on one side of the valve body 1, and a sealing mechanism 3 is provided on the other side of the connecting flange 2 to ensure the sealing performance of the ball valve. At the upper end of the valve body 1, a connecting valve stem 4 is fixed by a rotating connection, and a handle 5 is fixed to the upper end of the connecting valve stem 4 for easy manual operation by the operator. A ball core 6 is inserted into the lower end of the connecting valve stem 4. The ball core 6 is the core component of the ball valve and is responsible for controlling the flow of fluid. In order to further enhance the sealing performance of the ball valve, a valve cover 7 is bolted to the other side of the valve body 1. A wear-resistant mechanism 8 is fixed to the side of the valve cover 7 near the ball core 6 by a threaded connection to improve the wear resistance and service life of the ball valve.

[0025] Please see Figure 2 In order to quickly seal the connecting flange 2 on the valve body 1, one side of the inner wall of the mounting groove 31 is fixed to the outer wall of the baffle 32, one side of the baffle 32 is tightly attached to one side of the connecting plate 33, the connecting plate 33 is embedded in the mounting groove 31 and the buckle 34 extends through the baffle 32 into the mounting groove 31.

[0026] In addition, the lower end of the valve body 1 is fixed to the bottom valve stem 9 by a rotatable connection. The bottom valve stem 9 is the supporting component of the ball valve, ensuring the stability of the ball valve during operation. It is embedded and connected to the other side of the connecting flange 2 on the outer wall of the mounting groove 31, ensuring a tight fit between the sealing mechanism 3 and the valve body 1. A baffle 32 is provided on one side of the interior of the mounting groove 31. The function of the baffle 32 is to prevent the sealing gasket 35 from shifting during operation. A connecting plate 33 is provided on one side of the baffle 32. A clip is fixed to the side of the connecting plate 33 near the mounting groove 31. The function of snap 34 is to fix the sealing gasket 35 and prevent it from falling off. The sealing gasket 35 is glued to the other side of snap 34. The sealing gasket 35 is a key component of the ball valve seal and is responsible for realizing the sealing function of the ball valve. One side of the connecting flange 2 is fixedly connected to one side of the valve body 1, which ensures a firm connection between the connecting flange 2 and the valve body 1. The other side of the connecting flange 2 is detachably connected to one side of the sealing mechanism 3, which facilitates the disassembly and replacement of the sealing mechanism 3 when needed, thus improving the maintenance convenience of the ball valve.

[0027] Please see Figure 3 In order to quickly fix the graphite ring 85 in the valve body 1 and valve cover 7, the wear-resistant mechanism 8 includes a valve seat 81. The outer wall of the valve seat 81 is threaded to the inner wall of one side of the valve cover 7. The outer wall of the valve seat 81 is provided with an external thread 82. A movable groove 83 is provided on one side of the valve seat 81. A spring 84 is fixedly connected to one side of the inner wall of the movable groove 83. The inner wall of the valve seat 81 is threaded to the graphite ring 85. The outer wall of the valve seat 81 is provided with an external thread 82. One side of the valve seat 81 is embedded and connected to the outer wall of the movable groove 83. The number of springs 84 is set to eight and they are all distributed in a ring at equal intervals on one side of the inner wall of the movable groove 83. The other side of the springs 84 is in close contact with one side of the valve cover 7.

[0028] To achieve rapid fixation of the graphite ring 85 and ensure its stability and durability within the valve body 1 and valve cover 7, a highly efficient wear-resistant mechanism 8 is designed. The outer wall of the valve seat 81 is threaded to one side of the inner wall of the valve cover 7, ensuring a tight fit. An external thread 82 is provided on the outer wall of the valve seat 81 to facilitate precise engagement with the inner thread of the graphite ring 85. A movable groove 83 is provided on one side of the valve seat 81, and eight springs 84 are fixed to one side of the inner wall of this groove 83. These springs 84 are distributed in a ring at equal intervals to ensure uniform elasticity. Under the action of force, the other side of each spring 84 is tightly pressed against one side of the valve cover 7, thus forming an elastic fixing mechanism. This setting not only ensures the stability and reliability of the graphite ring 85 during operation, but also facilitates quick replacement when needed. The inner wall of the valve seat 81 is also threaded to connect with the outer thread of the graphite ring 85. This threaded connection not only improves the connection strength, but also ensures the sealing performance of the graphite ring 85 under high temperature and high pressure environments. The outer wall of the valve seat 81 is also provided with external threads 82, further enhancing its connection with the valve cover 7. The strength ensures the stable operation of the entire wear-resistant mechanism 8 under harsh working conditions. Furthermore, this design of the wear-resistant mechanism 8 not only enables rapid fixing of the graphite ring 85 but also ensures its high-efficiency wear resistance within the valve body 1 and valve cover 7, thereby significantly improving the stability and service life of the entire system. Through the sealing mechanism 3, when the connecting flange 2 is connected to a pipeline or other equipment, the sealing gasket 35 can tightly fit at the connection point, effectively preventing media leakage and improving the sealing performance of the equipment. Simultaneously, the design of the snap-fit ​​34 and the connecting plate 33 ensures that the sealing mechanism 3... It can be easily installed and disassembled, facilitating operation and maintenance by installers. Through the wear-resistant mechanism 8, the graphite ring 85 has excellent wear resistance, which can reduce the wear of the medium on the valve seat 81 and valve cover 7, and extend the service life of the equipment. In addition, the spring 84 allows the graphite ring 85 to automatically adjust its position when subjected to medium pressure, maintaining a tight fit with the valve seat 81 and valve cover 7, further improving the sealing performance of the equipment. At the same time, the wear-resistant mechanism 8 and the valve cover 7 are connected by threads, which facilitates installation and disassembly, and makes it easy to replace and maintain the graphite ring 85.

[0029] Working Principle: First, a connecting flange 2 is provided on one side of the valve body 1, and a sealing mechanism 3 is provided on the other side of the connecting flange 2 to ensure the sealing performance of the ball valve. At the upper end of the valve body 1, a connecting valve stem 4 is fixed by a rotatable connection, and a handle 5 is fixed to the upper end of the connecting valve stem 4 for easy manual operation. A ball core 6 is inserted into the lower end of the connecting valve stem 4. The ball core 6 is the core component of the ball valve, responsible for controlling the flow of fluid. To further enhance the sealing performance of the ball valve, a valve cover 7 is bolted to the other side of the valve body 1. A wear-resistant mechanism 8 is fixed to the side of the valve cover 7 near the ball core 6 by a threaded connection to improve the wear resistance and service life of the ball valve. In addition, a bottom valve stem 9 is fixed to the lower end of the valve body 1 by a rotatable connection. The bottom valve stem 9 is the supporting component of the ball valve, ensuring the stability of the ball valve during operation. The outer wall of the mounting groove 31 is connected to... The other side of the connecting flange 2 is embedded with a connection to ensure a tight fit between the sealing mechanism 3 and the valve body 1. A baffle 32 is provided on one side of the mounting groove 31. The function of the baffle 32 is to prevent the sealing gasket 35 from shifting during operation. A connecting plate 33 is provided on one side of the baffle 32. A buckle 34 is fixedly connected to the side of the connecting plate 33 near the mounting groove 31. The function of the buckle 34 is to fix the sealing gasket 35 and prevent it from falling off. The sealing gasket 35 is glued to the other side of the buckle 34. The sealing gasket 35 is a key component of the ball valve seal and is responsible for realizing the sealing function of the ball valve. One side of the connecting flange 2 is fixedly connected to one side of the valve body 1 to ensure a firm fit between the connecting flange 2 and the valve body 1. The other side of the connecting flange 2 is detachably connected to one side of the sealing mechanism 3, which makes it easy to disassemble and replace the sealing mechanism 3 when needed, thus improving the maintenance convenience of the ball valve.

[0030] Then, to achieve rapid fixation of the graphite ring 85 and ensure its stability and durability inside the valve body 1 and valve cover 7, a high-efficiency wear-resistant mechanism 8 is set. The outer wall of the valve seat 81 and the inner wall of one side of the valve cover 7 are connected by threads to ensure a tight fit between the two. The outer wall of the valve seat 81 is provided with external threads 82 to facilitate precise matching with the inner thread of the graphite ring 85. On one side of the valve seat 81, a movable groove 83 is provided, and eight springs 84 are fixed to one side of the inner wall of this movable groove 83. These springs 84 are distributed in a ring at equal intervals to ensure uniform elastic force. Each spring 84 The other side of 4 is tightly attached to one side of the valve cover 7, thus forming a flexible fixing mechanism. This setting not only ensures the stability and reliability of the graphite ring 85 during operation, but also facilitates quick replacement when needed. The inner wall of the valve seat 81 is also threaded to connect with the outer thread of the graphite ring 85. This threaded connection not only improves the connection strength, but also ensures the sealing performance of the graphite ring 85 under high temperature and high pressure environments. The outer wall of the valve seat 81 is also provided with external threads 82, which further enhances its connection strength with the valve cover 7, ensuring the stability of the entire wear-resistant mechanism 8 under harsh working conditions. In addition, the wear-resistant mechanism 8, through this configuration, not only achieves rapid fixation of the graphite ring 85, but also ensures its high-efficiency wear resistance inside the valve body 1 and valve cover 7, thereby greatly improving the stability and service life of the entire system. Through the configured sealing mechanism 3, when the connecting flange 2 is connected to a pipeline or other equipment, the sealing gasket 35 can fit tightly at the connection point, effectively preventing media leakage and improving the sealing performance of the equipment. At the same time, the buckle 34 and connecting plate 33 allow the sealing mechanism 3 to be easily installed and disassembled, facilitating operation and maintenance by installation personnel. The wear-resistant mechanism 8... The graphite ring 85 has excellent wear resistance, which can reduce the wear of the medium on the valve seat 81 and valve cover 7, and extend the service life of the equipment. In addition, the spring 84 allows the graphite ring 85 to automatically adjust its position when subjected to medium pressure, maintaining a tight fit with the valve seat 81 and valve cover 7, further improving the sealing performance of the equipment. At the same time, the wear-resistant mechanism 8 and the valve cover 7 are connected by threads, which facilitates installation and disassembly, and makes it easy to replace and maintain the graphite ring 85. The above is the working process of the entire device, and the contents not described in detail in this specification are all prior art known to those skilled in the art.

[0031] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A metal hard-seal ball valve, comprising a valve body (1), characterized in that: A connecting flange (2) is provided on one side of the valve body (1), and a sealing mechanism (3) is provided on the other side of the connecting flange (2). A connecting valve stem (4) is rotatably connected to the upper end of the valve body (1). A handle (5) is fixed to the upper end of the connecting valve stem (4). A ball core (6) is inserted into the lower end of the connecting valve stem (4). A valve cover (7) is bolted to the other side of the valve body (1). A wear-resistant mechanism (8) is threaded to the side of the valve cover (7) near the ball core (6). A bottom valve stem (9) is rotatably connected to the lower end of the valve body (1). The sealing mechanism (3) includes a mounting groove (31), the outer wall of which is embedded and connected to the other side of the connecting flange (2). A baffle (32) is provided on one side of the interior of the mounting groove (31), and a connecting plate (33) is provided on one side of the baffle (32). A buckle (34) is fixedly connected to the side of the connecting plate (33) near the mounting groove (31), and a sealing gasket (35) is adhered to the other side of the buckle (34).

2. The metal hard-seal ball valve according to claim 1, characterized in that: One side of the connecting flange (2) is fixedly connected to one side of the valve body (1), and the other side of the connecting flange (2) is detachably connected to one side of the sealing mechanism (3).

3. A metal hard-seal ball valve according to claim 1, characterized in that: The inner wall of the mounting groove (31) is fixed to the outer wall of the baffle (32), and one side of the baffle (32) is in close contact with one side of the connecting plate (33).

4. A metal hard-seal ball valve according to claim 3, characterized in that: The connecting plate (33) is embedded in the mounting groove (31) and the buckle (34) extends into the mounting groove (31) via the baffle (32).

5. A metal hard-seal ball valve according to claim 1, characterized in that: The wear-resistant mechanism (8) includes a valve seat (81), the outer wall of the valve seat (81) is threaded to the inner wall of one side of the valve cover (7), the outer wall of the valve seat (81) is provided with an external thread (82), the side of the valve seat (81) is provided with a movable groove (83), the inner wall of the movable groove (83) is fixedly connected with a spring (84), and the inner wall of the valve seat (81) is threaded with a graphite ring (85).

6. A metal hard-seal ball valve according to claim 5, characterized in that: The outer wall of the valve seat (81) is provided with an external thread (82), and one side of the valve seat (81) is embedded and connected to the outer wall of the movable groove (83).

7. A metal hard-seal ball valve according to claim 5, characterized in that: The number of springs (84) is set to eight, and they are all distributed in a ring at equal intervals on one side of the inner wall of the movable groove (83), and the other side of the springs (84) is in close contact with one side of the valve cover (7).

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