Bidirectional sealing super wear-resistant ball valve

Abstract

The utility model discloses a bidirectional sealing super wear-resistant ball valve which comprises a valve body, a first connecting pipe and a second connecting pipe are arranged in the middles of the two sides of the valve body respectively, and a lower positioning frame and an upper positioning frame are arranged in the middles of the lower end and the upper end of the valve body respectively. Meanwhile, the lower positioning frame and the upper positioning frame are connected with the valve seat and the valve cover correspondingly through a first positioning bolt and a second positioning bolt correspondingly, a ball is arranged in the middle of the interior of the valve body, a circulation opening is formed in the middle of the ball, and a lower sealing piece and an upper sealing piece are arranged at the lower end and the lower end of the ball correspondingly; a first protection cylinder and a second protection cylinder are arranged on the two sides of the ball respectively. According to the two-way sealing super-wear-resistant ball valve, the lower sealing piece and the upper sealing piece are made of the composite materials and the elastic rubber, so that the lower sealing piece and the upper sealing piece can be better tightly attached to the ball body under normal pressure in the using process, and meanwhile when the pressure changes, the elastic rubber can conduct self-adaptive compensation; therefore, the reliability of bidirectional sealing during use is ensured, and leakage is effectively prevented.

Description

A bidirectional sealing ultra-wear-resistant ball valve Technical Field

[0001] This utility model relates to the technical field of ball valves, specifically a bidirectional sealing ultra-wear-resistant ball valve. Background Technology

[0002] A ball valve is a valve in which the opening and closing element (ball) is driven by the valve stem and rotates around the valve's axis. It can also be used for fluid regulation and control. Hard-seal V-type ball valves, with their V-shaped ball core and hard alloy-faced metal seat, possess strong shearing force, making them particularly suitable for media containing fibers, small solid particles, etc. Multi-port ball valves not only flexibly control the merging, splitting, and switching of flow directions in pipelines, but also allow the closure of any channel while connecting two other channels.

[0003] Existing ball valves face various complex working conditions during use, such as high pressure, high-speed fluid scouring, and corrosion from media containing solid particles. As a result, existing ball valves have certain limitations in terms of sealing performance and wear resistance. To address these issues, existing equipment needs to be improved. Summary of the Invention

[0004] The purpose of this invention is to provide a bidirectional sealing ultra-wear-resistant ball valve to solve the problem mentioned in the background art that existing ball valves have certain limitations in terms of sealing performance and wear resistance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a bidirectional sealing ultra-wear-resistant ball valve, comprising a valve body,

[0006] The valve body has a first connecting pipe and a second connecting pipe respectively located on the middle of its two sides. The valve body also has a lower positioning frame and an upper positioning frame respectively located at the middle of its lower and upper ends. The lower positioning frame and the upper positioning frame are connected to the corresponding valve seat and valve cover by a first positioning bolt and a second positioning bolt, respectively. The valve body has a ball located in the middle of its interior, with a flow port in the middle. The ball also has a lower sealing element and an upper sealing element located at its lower end. The ball has a first protective cylinder and a second protective cylinder located on its two sides, respectively, at the connection points between the second connecting pipe and the first connecting pipe and the valve body.

[0007] Preferably, a positioning bearing is provided in the middle of the valve cover, and the top of the rotating valve stem provided above the valve cover passes through the positioning bearing and the upper seal and is detachably connected to the middle of the top of the ball. At the same time, the extension rod provided in the middle of the bottom of the ball passes through the lower seal and is movably connected to the middle of the valve seat.

[0008] Preferably, the outer side of the ball, the inside of the flow port, and the inner wall of the valve body are all coated with a tungsten carbide wear-resistant coating.

[0009] Preferably, the lower seal and the upper seal have the same structure, and the middle of the lower seal and the upper seal are both made of polytetrafluoroethylene and carbon fiber reinforced composite material, while the outer side of the lower seal and the upper seal is made of elastic rubber material, and the outer side of the lower seal and the upper seal is threaded to the valve body.

[0010] Preferably, the first protective cylinder and the second protective cylinder have the same structure, both being T-shaped structures, and the outer sides of the first protective cylinder and the second protective cylinder are provided with external threads. At the same time, the external threads are threaded to the internal threads of the first connecting pipe and the second connecting pipe provided on both sides of the valve body. The outer sides of the first protective cylinder and the second protective cylinder are made of metal material, and the inner sides of the first protective cylinder and the second protective cylinder are made of polyurethane material.

[0011] Compared with the prior art, the beneficial effects of this utility model are: this bidirectional sealing ultra-wear-resistant ball valve,

[0012] (1) In order to solve the problem that the existing ball valve has certain limitations in sealing performance and wear resistance, this application adopts composite materials and elastic rubber for the lower seal and the upper seal, so that under normal pressure, it can better fit tightly with the ball. At the same time, when the pressure changes, the elastic rubber can adaptively compensate, thereby ensuring the reliability of bidirectional sealing during use and effectively preventing leakage.

[0013] (2) In order to solve the problem that the existing ball valve has certain limitations in sealing performance and wear resistance, this application sprays tungsten carbide wear-resistant coating on the outer side of the ball, the inside of the flow port and the inner wall of the valve body. The coating has high hardness and good bonding strength, and can effectively resist fluid erosion and particle wear, thereby improving the overall wear resistance of the valve. Attached Figure Description

[0014] Figure 1 is a front view of the structure of this utility model;

[0015] Figure 2 is a front view cross-sectional structural diagram of the present invention;

[0016] Figure 3 is an enlarged structural schematic diagram of point A in Figure 2 of this utility model;

[0017] Figure 4 is an enlarged structural schematic diagram of section B in Figure 2 of this utility model.

[0018] In the diagram: 1. Valve body; 101. Lower positioning frame; 102. Upper positioning frame; 2. First connecting pipe; 3. Second connecting pipe; 4. Valve seat; 5. First positioning bolt; 6. Valve cover; 601. Positioning bearing; 7. Second positioning bolt; 8. Rotating valve stem; 9. Ball; 901. Flow port; 10. Lower seal; 11. Upper seal; 12. First protective sleeve; 13. Second protective sleeve. Detailed Implementation

[0019] 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.

[0020] Please refer to Figures 1-4. This utility model provides a technical solution: a bidirectional sealing ultra-wear-resistant ball valve. As shown in Figures 1 and 2, a first connecting pipe 2 and a second connecting pipe 3 are respectively arranged in the middle of both sides of the valve body 1. A lower positioning frame 101 and an upper positioning frame 102 are respectively arranged in the middle of the lower and upper ends of the valve body 1. The lower positioning frame 101 and the upper positioning frame 102 are respectively connected to the corresponding valve seat 4 and valve cover 6 through the first positioning bolt 5 and the second positioning bolt 7. The first positioning bolt 5 and the second positioning bolt 7 facilitate the connection of the valve seat 4 and valve cover 6 to the corresponding lower positioning frame 101 and upper positioning frame 102 on the valve body 1. This facilitates disassembly, allowing for the inspection and replacement of the ball 9, lower seal 10, upper seal 11, first protective cylinder 12, and second protective cylinder 13 inside the valve body 1. This prevents sealing failure or functional malfunction due to component aging. A positioning bearing 601 is provided in the middle of the valve cover 6, and the top of the rotating valve stem 8 above the valve cover 6 passes through the positioning bearing 601 and the upper seal 11, and is detachably connected to the top of the ball 9. Meanwhile, the extension rod provided in the middle of the bottom of the ball 9 passes through the lower seal 10 and is movably connected to the valve seat 4. By rotating the valve stem 8, the ball 9 is rotated, allowing fluid to flow through the flow port 901.

[0021] As shown in Figures 2, 3, and 4, a ball 9 is disposed in the center of the valve body 1, and a flow port 901 is opened in the center of the ball 9. The outer side of the ball 9, the inside of the flow port 901, and the inner wall of the valve body 1 are all coated with a tungsten carbide wear-resistant coating. By applying the tungsten carbide wear-resistant coating, the wear resistance of the outer side of the ball 9, the inside of the flow port 901, and the inner wall of the valve body 1 is improved during use, effectively resisting fluid erosion and particle wear. A lower seal 10 and an upper seal 11 are respectively disposed at the lower end of the ball 9. The upper seal 11 has the same structure, and both the lower seal 10 and the upper seal 11 are made of polytetrafluoroethylene and carbon fiber reinforced composite material. This allows the lower seal 10 and the upper seal 11 to fit tightly against the outside of the ball 9 under normal fluid pressure, achieving a good sealing effect. At the same time, the outer surfaces of the lower seal 10 and the upper seal 11 are made of elastic rubber, which allows the elastic rubber to adaptively compensate for changes in pressure, thereby ensuring bidirectional sealing during use. To ensure the reliability of the seal, the lower seal 10 and the upper seal 11 are threaded to the valve body 1. A first protective sleeve 12 and a second protective sleeve 13 are respectively provided on both sides of the ball 9. The first protective sleeve 12 and the second protective sleeve 13 are located at the connection points between the second connecting pipe 3 and the first connecting pipe 2 and the valve body 1, respectively. The first protective sleeve 12 and the second protective sleeve 13 have the same structure, both being T-shaped. External threads are provided on the outer sides of the first protective sleeve 12 and the second protective sleeve 13, which are threaded to the internal threads of the first connecting pipe 2 and the second connecting pipe 3 on both sides of the valve body 1. The outer sides of the first protective sleeve 12 and the second protective sleeve 13 are made of metal, while the inner sides are made of polyurethane. Through the first protective sleeve 12 and the second protective sleeve 13, physical protection is provided at the connection points of the first connecting pipe 2 and the second connecting pipe 3 and the valve body 1 when the fluid passes through them, preventing corrosion or external damage, ensuring the sealing and durability of the connection points, potentially reducing the risk of leakage and extending the valve's service life.

[0022] In use, first engage the valve seat 4 with the lower positioning frame 101, then rotate the first positioning bolt 5 to connect and fix the valve seat 4 with the lower positioning frame 101. Next, thread the first protective cylinder 12 and the second protective cylinder 13 to the connection points of the second connecting pipe 3, the first connecting pipe 2 and the valve body 1 respectively. Then rotate the lower seal 10 so that the bottom of the lower seal 10 fits against the valve seat 4. Next, pass the extension rod at the lower end of the ball 9 through the middle of the lower seal 10 and connect it to the inner side of the upper end of the valve seat 4 to position the ball 9. At the same time, the outer side of the lower end of the ball 9 fits against the upper end of the lower seal 10. Then rotate the upper seal 11 so that the lower end of the upper seal 11 fits against the outer side of the upper end of the ball 9. Then connect and fix the valve cover 6 with the upper positioning frame 102 through the second positioning bolt 7. Finally, rotate the lower end of the valve stem 8 through the positioning bearing 601, the middle of the upper seal 11 and the middle of the upper end of the ball 9 to complete the valve assembly.

[0023] When the valve needs to be opened, rotating the valve stem 8 rotates the ball 9, connecting the flow port 901 of the ball 9 with the second connecting pipe 3 and the first connecting pipe 2 on both sides of the valve body 1, allowing fluid to flow freely. When the valve needs to be closed, rotating the valve stem 8 in the opposite direction rotates the ball 9 until the sides of the ball 9 at both ends of the flow port 901 are tightly fitted against the inner walls of the valve body 1. During the closing process, the upper seal 11 and the lower seal 10 contact the ball 9 in the middle, forming the first sealing line. The outer sides of the upper seal 11 and the lower seal 10 further press the ball 9 under the pressure of the medium, achieving a bidirectional seal. During valve operation, because the outer side of the ball 9, the inside of the flow port 901, and the inner wall of the valve body 1 are all coated with a wear-resistant coating, and the first protective cylinder 12 and the second protective cylinder 13 are also provided to protect the connection between the valve body 1 and the second connecting pipe 3 and the first connecting pipe 2, they can effectively resist the erosion and wear of the fluid, ensuring the long-term stable operation of the valve.

[0024] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bidirectional sealing ultra-wear-resistant ball valve, comprising a valve body (1), characterized in that: The valve body (1) has a first connecting pipe (2) and a second connecting pipe (3) respectively in the middle of its two sides. The valve body (1) has a lower positioning frame (101) and an upper positioning frame (102) respectively in the middle of its lower and upper ends. The lower positioning frame (101) and the upper positioning frame (102) are connected to the corresponding valve seat (4) and valve cover (6) respectively through the first positioning bolt (5) and the second positioning bolt (7). The valve body (1) has a ball (9) in the middle, and the ball (9) has a flow port (901) in the middle. The ball (9) has a lower sealing element (10) and an upper sealing element (11) respectively in the lower and lower ends. The ball (9) has a first protective cylinder (12) and a second protective cylinder (13) respectively in the middle of its two sides. The first protective cylinder (12) and the second protective cylinder (13) are located at the connection between the second connecting pipe (3) and the first connecting pipe (2) and the valve body (1).

2. The bidirectional sealing ultra-wear-resistant ball valve as described in claim 1, characterized in that: The valve cover (6) is provided with a positioning bearing (601) in the middle, and the top of the rotating valve rod (8) provided above the valve cover (6) passes through the positioning bearing (601) and the upper seal (11) and is detachably connected to the top of the ball (9). At the same time, the extension rod provided at the bottom of the ball (9) passes through the lower seal (10) and is movably connected to the valve seat (4).

3. The bidirectional sealing ultra-wear-resistant ball valve as described in claim 1, characterized in that: The outer side of the ball (9), the inside of the flow port (901), and the inner wall of the valve body (1) are all coated with a tungsten carbide wear-resistant coating.

4. The bidirectional sealing ultra-wear-resistant ball valve as described in claim 1, characterized in that: The lower seal (10) and the upper seal (11) have the same structure, and the middle of the lower seal (10) and the upper seal (11) are made of polytetrafluoroethylene and carbon fiber reinforced composite material. Meanwhile, the outer side of the lower seal (10) and the upper seal (11) is made of elastic rubber material. The outer side of the lower seal (10) and the upper seal (11) is threaded to the valve body (1).

5. The bidirectional sealing ultra-wear-resistant ball valve as described in claim 1, characterized in that: The first protective cylinder (12) and the second protective cylinder (13) have the same structure, both being T-shaped structures. The first protective cylinder (12) and the second protective cylinder (13) have external threads on their outer sides, and the external threads are threaded to the internal threads of the first connecting pipe (2) and the second connecting pipe (3) on both sides of the valve body (1). The outer sides of the first protective cylinder (12) and the second protective cylinder (13) are made of metal, and the inner sides of the first protective cylinder (12) and the second protective cylinder (13) are made of polyurethane.

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