Anti-leakage fluorine-lined ball valve

Abstract

The utility model relates to the technical field of ball valves, in particular to an anti-leakage fluorine-lined ball valve which comprises a ball valve body, flanges are arranged at the two ends of the ball valve body, sealing mechanisms are arranged on the front faces of the flanges, and pneumatic mechanisms are arranged on the inner sides of the back faces of the flanges. When the ball valve is installed, the spring controls the sealing ring to abut against the butt-joint sealing face and is stretched, generated elastic force enables the sealing ring to be tightly attached to the sealing face, preliminary sealing is formed, external impurities can be effectively prevented from entering the ball valve, after the flange is fixed, compressed air is pumped into the air channel through the one-way valve, the air enters the air chamber to push the piston, and the sealing effect is achieved. The piston applies extra acting force to the sealing ring through the push rod, so that the sealing ring is tightly abutted against the butt joint sealing surface all the time, and even under the condition that the sealing surfaces are not uniformly attached due to different tightening degrees of bolts, the consistency and reliability of the sealing effect can be ensured, the risk of medium leakage is remarkably reduced, and the sealing performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a leakage-proof fluorine-lined ball valve. Background Art

[0002] In industrial production and fluid transportation, ball valves are commonly used as control valves in various piping systems. However, traditional ball valves have some sealing issues, especially when used with high pressure, corrosive media, and complex operating conditions. Leakage can occur, which not only wastes the fluid but can also lead to safety accidents and environmental pollution.

[0003] Existing fluorine-lined ball valves typically rely solely on the simple fit of the sealing ring against the sealing surface to achieve a seal. This sealing method requires high bolt tightening force during installation. Uneven bolt tightening can easily lead to loose sealing surfaces, resulting in leakage. Furthermore, after long-term use, the sealing ring may degrade due to wear and aging, making it difficult to effectively compensate and adjust the sealing performance of the traditional sealing structure. Utility Model Content

[0004] The purpose of the utility model is to provide a leakage-proof fluorine-lined ball valve to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a leakage-proof fluorine-lined ball valve, comprising a ball valve body, flanges are provided at both ends of the ball valve body, a sealing mechanism is provided on the front of the flange, and a pneumatic mechanism is provided on the inner side of the back of the flange; a platform is integrally formed at the top middle part of the ball valve body, a valve stem is movably sleeved inside the platform, and a spherical valve core is provided at the bottom end of the valve stem and at one end inside the ball valve body.

[0006] Preferably, the sealing mechanism includes an annular groove, an annular groove is arranged in an annular shape on the front surface of the flange, a sealing ring is movably arranged inside the annular groove, side grooves are symmetrically arranged at both ends of the inner side of the annular groove, and guide rings matching the side grooves are arranged on both sides of the sealing ring.

[0007] Preferably, the sealing mechanism also includes an air chamber, and several air chambers are arranged on the inner side of the flange and close to the back side of the annular groove. A spring is arranged inside the air chamber and close to one end of the annular groove, and a piston is arranged at the other end of the spring. A push rod is arranged in the middle of the left side of the piston, and the end of the push rod away from the piston is fixedly connected to the sealing ring.

[0008] Preferably, the pneumatic mechanism includes an air circuit, which is arranged in an annular shape inside the right side of the flange, and a one-way valve is arranged outside one side of the air circuit, the one-way valve is connected to the air circuit, and the air circuit is connected to several of the air chambers.

[0009] Preferably, a plurality of bolt holes are provided at equal arcs on the outer ring of the flange, and the bolt holes and the center of the air chamber and the flange are on the same straight line.

[0010] Preferably, an inner lining is provided on the inner wall of the ball valve body and the flange, and the material of the inner lining is fluoroplastic.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. For this type of leak-proof fluorine-lined ball valve, when installed, the spring controls the sealing ring to abut against and be stretched against the mating sealing surface, and the elastic force generated makes the sealing ring fit tightly against the sealing surface to form a preliminary seal, which can effectively prevent external impurities from entering the interior of the ball valve. After the flange is fixed, compressed gas is pumped into the air circuit through the one-way valve, and the gas enters the air chamber to push the piston. The piston applies additional force to the sealing ring through the push rod, so that the sealing ring is always in close contact with the mating sealing surface. Even when the sealing surface is unevenly fitted due to different bolt tightening degrees, the consistency and reliability of the sealing effect can be ensured, the risk of medium leakage is significantly reduced, and the sealing performance is improved; 2. For this type of leak-proof fluorine-lined ball valve, during long-term use of the ball valve, if the sealing effect is reduced due to factors such as wear, aging or changes in medium pressure of the sealing ring, the degree of fit between the sealing ring and the sealing surface can be adjusted by adding compressed gas to the air circuit, thereby realizing adaptive adjustment of the sealing performance. There is no need to frequently disassemble the ball valve for maintenance, which extends the service life of the ball valve and reduces maintenance costs and workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall main structure of the utility model.

[0013] Figure 2 This is a schematic diagram of the cross-sectional structure of the flange of the present invention.

[0014] Figure 3 This is a schematic diagram of the front view structure of the air chamber of the present invention.

[0015] Figure 4 For the utility model Figure 2 Enlarged schematic diagram of point A in the middle.

[0016] Figure 5 For the utility model Figure 2 Enlarged schematic diagram of point B in the middle.

[0017] In the figure: 1. Ball valve body; 2. Flange; 3. Platform; 4. Valve stem; 5. Annular groove; 6. Sealing ring; 7. Side groove; 8. Guide ring; 9. Air chamber; 10. Spring; 11. Piston; 12. Push rod; 13. Air path; 14. One-way valve; 15. Bolt hole; 16. Liner. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] like Figure 1-5 As shown, the utility model provides a technical solution: a leakage-proof fluorine-lined ball valve, including a ball valve body 1, flanges 2 are provided at both ends of the ball valve body 1, a sealing mechanism is provided on the front of the flange 2, the sealing mechanism includes an annular groove 5, an annular groove 5 is provided in an annular manner on the front of the flange 2, a sealing ring 6 is movably provided inside the annular groove 5, side grooves 7 are symmetrically provided at both ends of the inner side of the annular groove 5, and guide rings 8 matching the side grooves 7 are provided on both sides of the sealing ring 6. The sealing mechanism also includes an air chamber 9, a plurality of air chambers 9 are provided on the inner side of the flange 2 and close to the back side of the annular groove 5, a spring 10 is provided inside the air chamber 9 and close to one end of the annular groove 5, a piston 11 is provided at the other end of the spring 10, and a push rod 12 is provided in the middle of the left side of the piston 11. The end of the rod 12 away from the piston 11 is fixedly connected to the sealing ring 6, and a pneumatic mechanism is provided on the inner side of the back of the flange 2. The pneumatic mechanism includes an air circuit 13, and the air circuit 13 is arranged in an annular manner inside the right side of the flange 2. A one-way valve 14 is provided on the outside of one side of the air circuit 13. The one-way valve 14 is connected to the air circuit 13, and the air circuit 13 is connected to a number of air chambers 9. A number of bolt holes 15 are provided with equal arcs on the outer ring of the flange 2. The bolt holes 15 and the air chamber 9 are on the same straight line with the center of the flange 2. A platform 3 is integrally formed with the top of the middle part of the ball valve body 1, and a valve stem 4 is movably sleeved inside the platform 3. A spherical valve core is provided at the bottom end of the valve stem 4 and at one end inside the ball valve body 1. An inner lining 16 is provided at the inner wall of the ball valve body 1 and the flange 2. The material of the inner lining 16 is fluoroplastic.

[0020] In this embodiment, during installation, the spring 10 controls the sealing ring 6 to abut against the docking sealing surface and be stretched. The elastic force generated makes the sealing ring 6 fit tightly against the sealing surface, forming a preliminary seal, which can effectively prevent external impurities from entering the interior of the ball valve and lay the foundation for subsequent sealing work.

[0021] After the flange 2 is fixed, compressed gas is pumped into the air path 13 through the one-way valve. The gas enters the air chamber 9 and pushes the piston 11. The piston 11 applies additional force to the sealing ring 6 through the push rod 12, so that the sealing ring 6 is always in close contact with the docking sealing surface. Even if the sealing surface is unevenly fitted due to different bolt tightening degrees, the consistency and reliability of the sealing effect can be ensured, the risk of medium leakage can be significantly reduced, and the sealing performance can be improved.

[0022] During the long-term use of the ball valve, if the sealing effect is reduced due to factors such as wear and aging of the sealing ring 6 or changes in the medium pressure, the degree of fit between the sealing ring 6 and the sealing surface can be adjusted by adding compressed gas to the air circuit 13, thereby achieving adaptive adjustment of the sealing performance. There is no need to frequently disassemble the ball valve for maintenance, which extends the service life of the ball valve and reduces maintenance costs and workload.

[0023] Working principle: When installing the leak-proof fluorine-lined ball valve, place the sealing ring 6 in the annular groove 5, and the guide rings 8 on both sides cooperate with the side grooves 7 to ensure that the sealing ring 6 can be accurately positioned in the annular groove 5. At this time, the spring 10 is in a natural state. When assembled with the docking components, the spring 10 will control the sealing ring 6 to abut against the docking sealing surface. As the docking process proceeds, the spring 10 will be stretched and generate a certain elastic force. This elastic force will make the sealing ring 6 fit tightly against the docking sealing surface, forming a preliminary sealing effect, preventing external impurities from entering the interior of the ball valve, and also providing basic protection for subsequent sealing work. After using bolts to fix the flange 2, compressed gas is pumped into the air path 13 from the outside through the one-way valve 14. After being fixed to the docking surface by means of bolts passing through the bolt holes 15, compressed gas is pumped in from 14, and the gas enters each air chamber 9 along the gas path 13. As the air pressure in the air chamber 9 increases, the piston 11 moves toward the direction of the annular groove 5 under the action of the gas pressure. Since one end of the push rod 12 is connected to the piston 11 and the other end is fixedly connected to the sealing ring 6, the movement of the piston 11 will exert a force on the sealing ring 6 through the push rod 12, thereby driving the sealing ring 6 to always be in close contact with the docking sealing surface. In this way, even if the bolt tightening degree is different, the sealing ring 6 can be evenly fitted on the sealing surface through the action of the pneumatic mechanism, thereby ensuring the consistency and reliability of the sealing effect and effectively preventing medium leakage.

[0024] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A leak-proof fluorine-lined ball valve, characterized by: include A ball valve body (1), wherein flanges (2) are provided at both ends of the ball valve body (1), a sealing mechanism is provided on the front side of the flange (2), and a pneumatic mechanism is provided on the inner side of the back side of the flange (2); A platform (3) is integrally formed at the top of the middle portion of the ball valve body (1), a valve stem (4) is movably sleeved inside the platform (3), and a spherical valve core is provided at the bottom end of the valve stem (4) and located at one end inside the ball valve body (1); The sealing mechanism comprises an annular groove (5), the annular groove (5) is provided in an annular manner on the front surface of the flange (2), a sealing ring (6) is movably provided inside the annular groove (5), side grooves (7) are symmetrically provided at both ends of the inner side of the annular groove (5), and guide rings (8) matching the side grooves (7) are provided on both sides of the sealing ring (6); The sealing mechanism further comprises an air chamber (9), a plurality of air chambers (9) are provided on the inner side of the flange (2) and close to the back side of the annular groove (5), a spring (10) is provided inside the air chamber (9) and close to one end of the annular groove (5), a piston (11) is provided at the other end of the spring (10), a push rod (12) is provided at the middle of the left side of the piston (11), and the end of the push rod (12) away from the piston (11) is fixedly connected to the sealing ring (6); The pneumatic mechanism includes an air circuit (13), the air circuit (13) is provided in an annular shape inside the right side of the flange (2), a one-way valve (14) is provided outside one side of the air circuit (13), the one-way valve (14) is connected to the air circuit (13), and the air circuit (13) is connected to the plurality of air chambers (9); A plurality of bolt holes (15) are provided at equal arcs on the outer ring of the flange (2), and the bolt holes (15) and the center of the air chamber (9) and the flange (2) are on the same straight line; Liners (16) are provided on the inner walls of the ball valve body (1) and the flange (2), and the material of the lining (16) is fluoroplastic.

Images