Fluorine-lined ball valve

Abstract

The utility model discloses a kind of fluorine-lined ball valves, including valve body, the medium passage formed in valve body, the valve cover installed in valve body, the ball installed in the inside of valve body, the valve stem installed in valve cover and connect the ball, the valve seat and sampler being located in the ball two sides and cooperating ball and being set in valve body constitute sealing, the overflow passage is formed on the ball, the sampler and the overflow passage between link have communication component, the opening and closing component for opening and closing communication component is equipped on the communication component, and the opening and closing component has opening state and closed state, when the ball is in opening state, the opening and closing component is in closed state, when the ball is in closed state, the opening and closing component is in opening state.The utility model has following advantages and effects: the utility model has higher safety factor and reliability.

Description

Technical Field

[0001] This utility model relates to a valve, and more particularly to a fluoropolymer-lined ball valve. Background Technology

[0002] The structural principle of a ball valve is based on a ball with a circular through-hole as the opening and closing element. The ball rotates around the valve body's centerline with the valve stem to open and close the valve. Ball valves are mainly used in pipelines for shut-off, distribution, and changing the flow direction of media. They require only a 90-degree rotation and a very small torque to achieve a tight seal. In heavy chemical, fertilizer, petrochemical, and steel smelting applications involving the transportation of corrosive fluids, metal valves are obviously unsuitable due to corrosion. Therefore, corrosion-resistant fluoropolymer-lined ball valves are typically used in these applications.

[0003] Given the current complex and diverse operating conditions, it is necessary to expand the functionality of PTFE-lined ball valves to adapt to the diverse functional requirements under different operating conditions. For example, PTFE-lined ball valves with sampling functions are available on the market. However, currently, the samplers on most of these PTFE-lined ball valves are directly connected to the medium passage of the valve body. This structural design means that if a leak occurs at the sampler location, it will lead to a large leakage of the fluid medium, posing a significant safety hazard and weakening the product's reliability. Based on the above problems, this improvement solution has emerged. Utility Model Content

[0004] The purpose of this invention is to provide a fluoropolymer-lined ball valve that has a higher safety factor and reliability.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a fluoropolymer-lined ball valve, comprising a valve body, a medium channel formed in the valve body, a valve cover installed in the valve body, a ball installed inside the valve body, a valve stem installed in the valve cover and connected to the ball, a valve seat disposed in the valve body and located on both sides of the ball and forming a seal with the ball, and a sampler. The ball has a flow channel formed thereon, and a connecting component is connected between the sampler and the flow channel. The connecting component is provided with an opening and closing component that moves with the ball and is used to open and close the connecting component. The opening and closing component has an open state and a closed state. When the ball is in the open state, the opening and closing component is in the closed state, and when the ball is in the closed state, the opening and closing component is in the open state.

[0006] By adopting the above technical solution, when the ball is in the open state, the opening and closing component is in the closed state, preventing the fluid medium from entering the sampler through the connecting component. When sampling is performed, the ball is switched to the closed state, at which point the opening and closing component is in the open state. Then, the sampler is opened, allowing the fluid medium in the flow channel to enter the sampler through the connecting component, thus completing the sampling operation. This structure provides double sealing protection whether sampling or not. Furthermore, when the valve is open, sampling cannot be achieved by simply opening the sampler, thus preventing accidental triggering and providing higher safety. When the valve is closed, opening the sampler only extracts a small amount of fluid medium from the flow channel, preventing large-scale leakage of fluid medium due to sudden leaks at the sampler location during sampling. This gives the PTFE-lined ball valve a higher safety factor and reliability.

[0007] The valve body is further configured such that a lower support column extending toward the ball is sealed and installed on the valve body. The lower support column is coaxially arranged with the valve stem and rotates with the ball. The communication component includes a lower connecting channel disposed on the lower support column and connected to the sampler, and an upper connecting channel disposed on the ball and connected to the flow channel and the lower connecting channel.

[0008] By adopting the above technical solution, the lower connecting channel works in conjunction with the upper connecting channel to achieve the connection between the flow channel and the sampler, so that the fluid medium in the flow channel can enter the sampler.

[0009] The opening and closing assembly is further configured as follows: the opening and closing assembly includes an upper sealing plate sealed and installed in the upper connecting channel, a lower sealing plate sealed and installed in the lower connecting channel, an upper through hole formed in the upper sealing plate, a lower through hole formed in the lower sealing plate, and a sealing gasket disposed between the upper sealing plate and the lower sealing plate to achieve sealed rotation of the upper sealing plate and the lower sealing plate. When the ball is in the open state, the upper through hole and the lower through hole are misaligned and sealed. When the ball is in the closed state, the upper through hole and the lower through hole are intersecting and connected.

[0010] By adopting the above technical solution, when the sphere is in the open state, the upper and lower through holes are misaligned and sealed, cutting off the flow of fluid medium through the upper and lower connecting channels; when the sphere is in the closed state, the upper and lower through holes are intersected and connected, allowing the fluid medium in the flow channel to enter the sampler through the upper and lower connecting channels.

[0011] The sampler is further configured to include a housing disposed on the lower support column, a sliding hole formed in the housing and communicating with the outside and the lower connection channel, and a sealing sampling component slidably disposed in the sliding hole.

[0012] By adopting the above technical solution, the sealing sampling assembly achieves a seal between the lower connecting channel and the sampler, and the sampling operation of the sampler can be realized by operating the sealing sampling assembly.

[0013] The sealing sampling assembly is further configured as follows: a sampling rod is slidably disposed in the sliding hole, a sampling channel is formed on the sampling rod and connects the lower connecting channel to the outside, a sealing part is disposed on the upper end of the sampling rod, and a clamping spring is used to drive the sampling rod to cooperate with the lower connecting channel to form a seal for the sampling channel.

[0014] By adopting the above technical solution, the sealing part driven by the clamping spring cooperates with the lower connecting channel to seal the sampling channel, and the lower connecting channel and the sampling channel can be connected by moving the sealing part to realize the sampling operation.

[0015] The valve is further configured such that: a sealing packing is provided between the valve stem and the valve cover, and a fastener is provided between the sealing packing and the valve cover, with the upper part of the fastener extending out of the valve cover and the lower part extending below the sealing packing.

[0016] By adopting the above technical solution, when it is necessary to replace the sealing packing, the entire sealing packing can be easily taken out by pulling out the buckle, thereby realizing the convenient replacement of the sealing packing.

[0017] A further configuration includes: a packing gland located above the sealing packing, a compression block inserted into the sealing packing located below the packing gland, the compression block having a conical cross-section, and a compression spring located between the compression block and the packing gland.

[0018] By adopting the above technical solution, the compression spring applies a continuous force to the compression block, and the force acts on the sealing packing through the compression block, so that the sealing packing can better maintain the optimal sealing force. This achieves automatic adjustment of the sealing force of the sealing packing without manual intervention, which is suitable for the long-term development of enterprises.

[0019] In summary, the present invention has the following advantages: the present invention has a higher safety factor and reliability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment; Figure 2 for Figure 1 Enlarged view of section A in the middle; Figure 3 for Figure 1 Enlarged view of section B in the middle; Figure 4 for Figure 1 Enlarged view of section C; Figure 5 This is a schematic diagram of the opening and closing component in the embodiment.

[0021] In the diagram: 1. Valve body; 2. Medium passage; 3. Valve cover; 4. Ball; 5. Valve stem; 6. Valve seat; 7. Sampler; 71. Housing; 72. Slide hole; 73. Sampling rod; 74. Sampling channel; 75. Sealing part; 76. Pressing spring; 8. Flow passage; 9. Connecting assembly; 91. Lower connecting channel; 92. Upper connecting channel; 10. Opening and closing assembly; 101. Upper sealing plate; 102. Lower sealing plate; 103. Upper through hole; 104. Lower through hole; 105. Sealing gasket; 11. Lower support column; 12. Sealing packing; 13. Buckle seat; 14. Packing gland; 15. Extrusion block; 16. Extrusion spring; 17. Actuator. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] refer to Figures 1 to 5 A PTFE-lined ball valve includes a valve body 1, a medium passage 2 formed in the valve body 1, a valve cover 3 fixedly installed in the valve body 1, a ball 4 installed inside the valve body 1, a valve stem 5 installed in the valve cover 3 and integrally connected to the ball 4, a valve seat 6 installed inside the valve body 1 and located on both sides of the ball 4 to form a seal with the ball 4, and a sampler 7. A flow passage 8 is formed on the ball 4, and a connecting assembly 9 connects the sampler 7 to the flow passage 8. The connecting assembly 9 is provided with an opening / closing assembly 10 that moves with the ball 4 and is used to open and close the connecting assembly 9. The opening / closing assembly 10 has an open state and a closed state. When the ball 4 is in the open state, the opening / closing assembly 10 is in the closed state; when the ball 4 is in the closed state, the opening / closing assembly 10 is in the open state. The valve body 1 is assembled from multiple valve blocks, and an actuator 17 connected to the valve stem 5 is installed on the valve cover 3.

[0024] A lower support column 11 is fixedly installed on the valve body 1, extending towards and partially into the ball 4. The lower support column 11 is coaxially arranged with the valve stem 5 and rotates with the ball 4. The connecting assembly 9 includes a lower connecting channel 91 opened in the lower support column 11 and connected to the sampler 7, and an upper connecting channel 92 opened in the ball 4 and connected to the flow channel 8 and the lower connecting channel 91.

[0025] The opening and closing assembly 10 includes an upper sealing plate 101 sealed and installed in the upper connecting channel 92, a lower sealing plate 102 sealed and installed in the lower connecting channel 91, an upper through hole 103 formed in the upper sealing plate 101, a lower through hole 104 formed in the lower sealing plate 102, and a sealing gasket 105 disposed between the upper sealing plate 101 and the lower sealing plate 102 to achieve sealed rotation of both the upper sealing plate 101 and the lower sealing plate 102. The sealing gasket 105 simultaneously achieves sealed rotation between the ball 4 and the lower support column 11, and the lower through hole 104 penetrates the sealing gasket 105.

[0026] The upper sealing plate 101 is integrally connected to the anti-corrosion plastic on the sphere 4, and the lower sealing plate 102 is integrally connected to the anti-corrosion plastic on the lower support column 11. Both the upper sealing plate 101 and the lower sealing plate 102 are made of polytetrafluoroethylene (PTFE). When the sphere 4 is in the open state, the upper through hole 103 and the lower through hole 104 are misaligned and sealed. When the sphere 4 is in the closed state, the upper through hole 103 and the lower through hole 104 are intersected and connected. The sealing gasket 105 is made of fluororubber.

[0027] The sampler 7 includes a housing 71 fixedly mounted on a lower support column 11, a sliding hole 72 formed in the housing 71 and communicating with the outside and a lower connecting channel 91, and a sealing sampling assembly slidably mounted in the sliding hole 72. The sealing sampling assembly includes a sampling rod 73 that is slidably mounted in the sliding hole 72, a sampling channel 74 formed in the sampling rod 73 and communicating with the lower connecting channel 91 and the outside, a sealing part 75 integrally mounted on the upper end of the sampling rod 73, and a clamping spring 76 that drives the sampling rod 73 to cooperate with the lower connecting channel 91 to form a seal for the sampling channel 74. Both the sampling rod 73 and the sealing part 75 are made of polytetrafluoroethylene (PTFE). The clamping spring 76 is fitted onto the sampling rod 73, with its two ends abutting against the sampling rod 73 and the housing 71 respectively.

[0028] A sealing packing 12 is provided between the valve stem 5 and the valve cover 3. A retaining seat 13 is provided between the sealing packing 12 and the valve cover 3. The upper part of the retaining seat 13 extends out of the valve cover 3 and the lower part extends below the sealing packing 12. The retaining seat 13 is made of polytetrafluoroethylene. A packing gland 14 is provided above the sealing packing 12 and is installed on the valve cover 3. A compression block 15 is provided below the packing gland 14 and is inserted into the sealing packing 12. The compression block 15 has a conical cross-section, and a compression spring 16 is provided between the compression block 15 and the packing gland 14.

[0029] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A fluoropolymer-lined ball valve, comprising a valve body (1), a medium passage (2) formed in the valve body (1), a valve cover (3) installed in the valve body (1), a ball (4) installed inside the valve body (1), a valve stem (5) installed in the valve cover (3) and connected to the ball (4), a valve seat (6) disposed inside the valve body (1) and located on both sides of the ball (4) and forming a seal with the ball (4), and a sampler (7), wherein a flow passage (8) is formed on the ball (4), characterized in that: A connecting component (9) is connected between the sampler (7) and the flow channel (8). The connecting component (9) is provided with an opening and closing component (10) that moves with the ball (4) and is used to open and close the connecting component (9). The opening and closing component (10) has an open state and a closed state. When the ball (4) is in the open state, the opening and closing component (10) is in the closed state. When the ball (4) is in the closed state, the opening and closing component (10) is in the open state.

2. The PTFE-lined ball valve according to claim 1, characterized in that: The valve body (1) is sealed with a lower support column (11) extending toward the ball (4). The lower support column (11) is coaxially arranged with the valve stem (5) and rotates with the ball (4). The communication component (9) includes a lower connecting channel (91) disposed on the lower support column (11) and connected to the sampler (7) and an upper connecting channel (92) disposed on the ball (4) and connected to the flow channel (8) and the lower connecting channel (91).

3. The PTFE-lined ball valve according to claim 2, characterized in that: The opening and closing assembly (10) includes an upper sealing plate (101) sealed and installed in the upper connecting channel (92), a lower sealing plate (102) sealed and installed in the lower connecting channel (91), an upper through hole (103) formed in the upper sealing plate (101), a lower through hole (104) formed in the lower sealing plate (102), and a sealing gasket (105) disposed between the upper sealing plate (101) and the lower sealing plate (102) to achieve sealed rotation of the upper sealing plate (101) and the lower sealing plate (102). When the ball (4) is in the open state, the upper through hole (103) and the lower through hole (104) are misaligned and sealed. When the ball (4) is in the closed state, the upper through hole (103) and the lower through hole (104) are intersecting and connected.

4. The PTFE-lined ball valve according to claim 2, characterized in that: The sampler (7) includes a housing (71) disposed on the lower support column (11), a sliding hole (72) formed in the housing (71) and communicating with the outside and the lower connecting channel (91), and a sealing sampling assembly slidably disposed in the sliding hole (72).

5. The PTFE-lined ball valve according to claim 4, characterized in that: The sealing sampling assembly includes a sampling rod (73) that is slidably disposed in the sliding hole (72), a sampling channel (74) formed in the sampling rod (73) and communicating with the lower connecting channel (91) and the outside, a sealing part (75) disposed at the upper end of the sampling rod (73), and a clamping spring (76) that drives the sampling rod (73) to cooperate with the lower connecting channel (91) to form a seal for the sampling channel (74).

6. The PTFE-lined ball valve according to claim 1, characterized in that: A sealing packing (12) is provided between the valve stem (5) and the valve cover (3), and a fastener (13) is provided between the sealing packing (12) and the valve cover (3). The upper part of the fastener (13) extends out of the valve cover (3) and the lower part extends to below the sealing packing (12).

7. The PTFE-lined ball valve according to claim 6, characterized in that: A packing gland (14) is provided above the sealing packing (12), and a compression block (15) is provided below the packing gland (14) and inserted into the sealing packing (12). The compression block (15) has a conical cross section, and a compression spring (16) is provided between the compression block (15) and the packing gland (14).

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