Negative-pressure-resistant fluorine-lined ball valve

Abstract

The utility model discloses a negative pressure resistant fluorine lining ball valve, which belongs to the technical field of ball valve equipment and comprises a valve pipe, one end of the surface of the valve pipe is fixedly connected with a first lower flange plate, the upper surface of the first lower flange plate is fixedly provided with a first upper flange plate, and the upper end of the first upper flange plate is rotatably connected with a handle. A ball valve assembly is arranged in the valve pipe, a second lower flange plate is fixedly connected to the other end of the surface of the valve pipe, a second upper flange plate is fixedly installed on the upper surface of the second lower flange plate, and a compression-resistant assembly is arranged at the upper end of the second upper flange plate. The pressure-resistant assembly is arranged, so that the device can effectively cope with the change of pressure in a pipeline, the pressure is balanced or relieved through the movement of the piston and the elastic effect of the pressure-resistant spring, and therefore stable operation of a valve pipe and a whole pipeline system is protected, the operation convenience of the valve is improved through the arrangement of the ball valve assembly, and the service life of the valve is prolonged. And the accuracy and the flexibility of water flow control are ensured.

Description

Technical Field

[0001] This utility model relates to the field of ball valve equipment technology, and in particular to a fluoropolymer-lined ball valve resistant to negative pressure. Background Technology

[0002] In the petrochemical production process, valves are important control components of pipeline systems, and their performance is directly related to the safety and efficiency of the entire production process. Fluorine-lined ball valves, as a type of valve with excellent corrosion resistance, have been widely used in petrochemical, chemical and other fields since their development began in the 1970s.

[0003] Traditional fluoropolymer-lined ball valves are prone to leakage under negative pressure. In addition, due to the relatively low pressure resistance of fluoropolymer-lined materials, especially under high pressure, traditional fluoropolymer-lined ball valves are prone to deformation or cracking, which affects the safety and stability of the entire pipeline system. This limits the practical application of fluoropolymer-lined ball valves. In order to solve the above problems, this utility model provides a negative pressure resistant fluoropolymer-lined ball valve. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a fluoropolymer-lined ball valve designed to withstand negative pressure.

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

[0006] A fluoropolymer-lined ball valve resistant to negative pressure includes a valve tube. A first lower flange is fixedly connected to one end of the valve tube. A first upper flange is fixedly installed on the upper surface of the first lower flange. A handle is rotatably connected to the upper end of the first upper flange. A ball valve assembly is provided inside the valve tube. A second lower flange is fixedly connected to the other end of the valve tube. A second upper flange is fixedly installed on the upper surface of the second lower flange. A pressure-resistant assembly is provided at the upper end of the second upper flange.

[0007] As a further improvement of this utility model, the ball valve assembly includes a lower bearing disposed at the lower end of the valve tube, an upper bearing disposed at the upper end of the valve tube, a ball valve body rotatably connected between the lower bearing and the upper bearing, and a transmission rod fixedly connected to the lower end of the handle, the lower end of the transmission rod passing through the upper bearing and fixedly connected to the ball valve body.

[0008] As a further improvement of this utility model, the pressure-resistant assembly includes a pressure-resistant pipe fixedly connected to the upper end of the second upper flange. Both sides of the pressure-resistant pipe are fixedly connected to fixed seats. The upper ends of the two fixed seats are fixedly connected to fixed rods. The upper ends of the two fixed rods are fixedly connected to pressure-resistant springs. The upper ends of the two pressure-resistant springs are fixedly connected to sleeve rods. The fixed rods are movably connected inside the sleeve rods. The upper ends of the two sleeve rods are fixedly connected to the same movable plate.

[0009] As a further improvement of this utility model, a movable rod is fixedly connected to the lower end of the movable plate, and a piston is fixedly connected to the lower end of the movable rod. The piston is movably connected inside the pressure-resistant tube.

[0010] As a further improvement of this utility model, the upper ends of both the first upper flange and the second upper flange are threaded with several mounting bolts.

[0011] As a further improvement of this utility model, both ends of the valve pipe are fixedly connected to connecting flanges, and a sealing ring is fixedly connected to one side of the connecting flange.

[0012] The beneficial effects of this utility model are:

[0013] By incorporating pressure-resistant components, this device, designed with a pressure-balancing system including a pressure-resistant tube, piston, movable plate, connecting sleeve, and pressure-resistant spring, can effectively cope with changes in internal pipeline pressure. Whether it's negative pressure due to pressure drop or excessive pressure, the device can balance or alleviate the pressure through piston movement and the elastic action of the pressure-resistant spring, thereby protecting the valve pipe and the stable operation of the entire pipeline system. Furthermore, the pressure-resistant spring design not only helps to automatically adjust the piston position during pressure changes but also prevents the piston from detaching from the pressure-resistant tube under extreme pressure conditions, thus ensuring the structural integrity and operational safety of the device.

[0014] By incorporating a ball valve assembly, the ball valve body, in conjunction with upper and lower bearings, allows the valve body to rotate via the handle and transmission rod, thus changing the angle of the water flow channel. This not only improves the ease of valve operation but also ensures the accuracy and flexibility of water flow control, meeting the flow regulation needs under different operating conditions.

[0015] In summary, the utility model significantly improves the pressure adaptability of the valve device through a pressure balancing mechanism, which not only enhances the stability and durability of the pipeline system but also optimizes water flow efficiency and reduces energy consumption and operating costs. This is particularly important for industrial fields such as water treatment, chemical, and petroleum that require long-term stable operation and efficient management. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the structure of a fluoropolymer-lined ball valve designed to withstand negative pressure according to this utility model.

[0017] Figure 2 This is a schematic diagram of the ball valve assembly of a fluoropolymer-lined ball valve designed to withstand negative pressure, as proposed in this utility model.

[0018] Figure 3 This is a schematic diagram of the pressure-resistant component of a fluoropolymer-lined ball valve designed to withstand negative pressure.

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of a fluoropolymer-lined ball valve designed to withstand negative pressure, as proposed in this utility model.

[0020] In the diagram: 1 Valve pipe, 2 First lower flange, 3 First upper flange, 4 Handle, 5 Second lower flange, 6 Second upper flange, 7 Lower bearing, 8 Upper bearing, 9 Ball valve body, 10 Transmission rod, 11 Pressure-resistant pipe, 12 Fixed seat, 13 Fixed rod, 14 Pressure-resistant spring, 15 Sleeve rod, 16 Movable plate, 17 Movable rod, 18 Piston, 19 Mounting bolt, 20 Connecting flange, 21 Sealing ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-4 A negative pressure fluoropolymer-lined ball valve includes a valve pipe 1, a first lower flange 2 fixedly connected to one end of the surface of the valve pipe 1, a first upper flange 3 fixedly installed on the upper surface of the first lower flange 2, a handle 4 rotatably connected to the upper end of the first upper flange 3, a ball valve assembly provided inside the valve pipe 1, a second lower flange 5 fixedly connected to the other end of the surface of the valve pipe 1, a second upper flange 6 fixedly installed on the upper surface of the second lower flange 5, and a pressure-resistant assembly provided at the upper end of the second upper flange 6.

[0023] In this utility model, the ball valve assembly includes a lower bearing 7 disposed at the lower end of the valve tube 1, an upper bearing 8 disposed at the upper end of the valve tube 1, a ball valve body 9 rotatably connected between the lower bearing 7 and the upper bearing 8, and a transmission rod 10 fixedly connected to the lower end of the handle 4. The lower end of the transmission rod 10 passes through the upper bearing 8 and is fixedly connected to the ball valve body 9. By rotating the handle 4, the ball valve body 9 is driven to rotate flexibly between the lower bearing 7 and the upper bearing 8 inside the valve tube 1 through the transmission action of the transmission rod 10. This not only improves the ease of operation of the valve, but also ensures the rapid switching and precise control of the water flow channel.

[0024] The pressure-resistant assembly includes a pressure-resistant pipe 11 fixedly connected to the upper end of the second upper flange 6. Fixed seats 12 are fixedly connected to both sides of the pressure-resistant pipe 11. Fixed rods 13 are fixedly connected to the upper ends of both fixed seats 12. Pressure-resistant springs 14 are fixedly connected to the upper ends of both fixed rods 13. Sleeve rods 15 are fixedly connected to the upper ends of both pressure-resistant springs 14. The fixed rods 13 are movably connected within the sleeve rods 15. The same movable plate 16 is fixedly connected to the upper ends of both sleeve rods 15. A movable rod 17 is fixedly connected to the lower end of the movable plate 16. A piston is fixedly connected to the lower end of the movable rod 17. 18. Piston 18 is movably connected inside the pressure-resistant tube 11. When the internal pressure of the device decreases and a negative pressure phenomenon occurs, piston 18 will move downward inside the pressure-resistant tube 11 to balance the pressure inside the valve tube 1. During this process, piston 18 drives movable plate 16 and its connecting sleeve rods 15 on both sides to slide downward on fixed rod 13 through movable rod 17, and compresses the pressure-resistant spring 14 at the upper end of fixed rod 13. When the pressure returns to normal, the elastic force of pressure-resistant spring 14 will push piston 18 back to its original position. This mechanism ensures the stable operation of the device under negative pressure environment.

[0025] The upper ends of the first upper flange 3 and the second upper flange 6 are both threaded with several mounting bolts 19. Both ends of the valve pipe 1 are fixedly connected with connecting flanges 20. A sealing ring 21 is fixedly connected to one side of the connecting flange 20. The sealing ring 21 ensures the sealing performance when the device is connected.

[0026] In use, the device is first installed onto the target pipeline via the connecting flange 20. The pressure-resistant pipe 11 is then installed onto the second lower flange 5 of the valve pipe 1 via the second upper flange 6 and mounting bolts 19. Turning the handle 4 drives the ball valve body 9 to rotate between the lower bearing 7 and the upper bearing 8 within the valve pipe 1 via the transmission rod 10, thereby changing the angle of the ball valve body 9 to allow water flow. When the internal pressure of the device decreases, creating a negative pressure phenomenon, it drives the piston 18 to move downwards inside the pressure-resistant pipe 11, thus balancing the internal pressure of the valve pipe 1. Simultaneously, the piston 18 moves downwards, driving the movable plate 16 via the movable rod 17. The piston moves downward, causing the connecting sleeves 15 on both sides of the movable plate 16 to move downward on the surface of the fixed rod 13. At the same time, it compresses the anti-compression spring 14 at the upper end of the fixed rod 13. When the pressure is restored, the anti-compression spring 14 will push the piston 18 back to its original position. Finally, when the internal pressure of the device is too high, the piston 18 will move upward inside the anti-compression tube 11 to avoid damage to the valve tube 1 due to excessive pressure. At the same time, the elastic force of the anti-compression spring 14 also plays a dual protective role: on the one hand, it prevents the piston 18 from dislodging from the anti-compression tube 11; on the other hand, it pulls the piston 18 back to its original position after the pressure returns to normal, ensuring the continued availability of the valve tube 1.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A fluoropolymer-lined ball valve resistant to negative pressure, comprising a valve pipe (1), characterized in that, One end of the surface of the valve pipe (1) is fixedly connected to a first lower flange (2), and a first upper flange (3) is fixedly installed on the upper surface of the first lower flange (2). A handle (4) is rotatably connected to the upper end of the first upper flange (3). A ball valve assembly is provided inside the valve pipe (1). The other end of the surface of the valve pipe (1) is fixedly connected to a second lower flange (5), and a second upper flange (6) is fixedly installed on the upper surface of the second lower flange (5). A pressure-resistant assembly is provided at the upper end of the second upper flange (6).

2. The anti-negative pressure fluoropolymer-lined ball valve according to claim 1, characterized in that, The ball valve assembly includes a lower bearing (7) disposed at the lower end of the valve tube (1), an upper bearing (8) disposed at the upper end of the valve tube (1), a ball valve body (9) rotatably connected between the lower bearing (7) and the upper bearing (8), and a transmission rod (10) fixedly connected to the lower end of the handle (4), the lower end of the transmission rod (10) passing through the upper bearing (8) and fixedly connected to the ball valve body (9).

3. The anti-negative pressure fluoropolymer-lined ball valve according to claim 1, characterized in that, The pressure-resistant assembly includes a pressure-resistant pipe (11) fixedly connected to the upper end of the second upper flange (6). Both sides of the pressure-resistant pipe (11) are fixedly connected to a fixing seat (12). The upper ends of the two fixing seats (12) are fixedly connected to a fixing rod (13). The upper ends of the two fixing rods (13) are fixedly connected to a pressure-resistant spring (14). The upper ends of the two pressure-resistant springs (14) are fixedly connected to a sleeve rod (15). The fixing rod (13) is movably connected inside the sleeve rod (15). The upper ends of the two sleeve rods (15) are fixedly connected to the same movable plate (16).

4. The anti-negative pressure fluoropolymer-lined ball valve according to claim 3, characterized in that, The lower end of the movable plate (16) is fixedly connected to a movable rod (17), and the lower end of the movable rod (17) is fixedly connected to a piston (18), which is movably connected inside the pressure-resistant tube (11).

5. A fluoropolymer-lined ball valve for resisting negative pressure according to claim 1, characterized in that, The upper ends of the first upper flange (3) and the second upper flange (6) are both threaded with several mounting bolts (19).

6. The anti-negative pressure fluoropolymer-lined ball valve according to claim 1, characterized in that, Both ends of the valve pipe (1) are fixedly connected to connecting flanges (20), and a sealing ring (21) is fixedly connected to one side of the connecting flange (20).

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