Wearless high-pressure resistant ball valve

Abstract

The utility model discloses a kind of wear-resistant high-pressure ball valves, it is related to ball valve technical field, including body, valve ball is rotationally connected in body, valve stem is fixedly connected in valve ball top, valve stem top is stretched outside body and is transmission-connected with drive assembly, protective box is sleeved outside drive assembly, protective box is used to prevent rainwater or dust from entering inside, compensation mechanism is symmetrically arranged in the both sides of body, and compensation mechanism is used to fill the gap after valve ball wear out.The utility model actively fills the gap of valve ball wear by compensation mechanism, avoid the sealing failure problem caused by friction of traditional ball valve, the rotation connection design of body and valve ball, valve stem, cooperate with the compensation mechanism of both sides, form symmetrical stress structure, effectively disperse high-pressure medium impact force, improve overall pressure resistance, protective box isolates drive assembly, prevent rainwater, dust and other pollutants from invading, prolong the service life of internal precision components, while reducing the influence of external impact on transmission system.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, and in particular to a wear-free, high-pressure 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 ball valve axis. It can be used for fluid regulation and control. Among them, the hard-seal V-type ball valve has a strong shearing force between the V-shaped ball core and the metal valve seat with hard alloy overlay, which is particularly suitable for media containing fibers, small solid particles, etc. Multi-port ball valves can not only flexibly control the merging, splitting and switching of media in pipelines, but also close any channel and connect the other two channels. Ball valves are classified into pneumatic ball valves, electric ball valves and manual ball valves according to the driving method.

[0003] In existing technologies, ball valves are usually operated by a handle, which is directly connected to the valve stem. However, the handle is prone to loosening when working in high-pressure environments, which can lead to poor sealing of the ball valve. In addition, wear between the ball valve and the valve body can cause leakage, requiring replacement and resulting in high maintenance costs.

[0004] Therefore, there is an urgent need for a wear-free, high-pressure resistant ball valve to solve the problems existing in the above-mentioned technologies. Utility Model Content

[0005] The purpose of this invention is to provide a wear-free, high-pressure resistant ball valve to solve the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides a wear-free, high-pressure resistant ball valve, including a body, a valve ball rotatably connected inside the body, a valve stem fixedly connected to the top of the valve ball, the top of the valve stem extending out of the body and being driven by a drive assembly, a protective box sleeved on the outside of the drive assembly to prevent rainwater or dust from entering the interior, and compensation mechanisms symmetrically arranged on both sides of the body to fill the gaps after the valve ball wears.

[0007] Optionally, the drive assembly includes a worm gear fixedly connected to the valve stem, the worm gear being located inside the protective box, the worm gear engaging a worm, and the worm being rotatably connected to the protective box.

[0008] Optionally, a connecting shaft is fixedly connected through the center of the worm gear, the connecting shaft is rotatably connected to the protective box, and a knob is fixedly connected to the top of the connecting shaft outside the protective box, the knob being rotatably connected to the outer wall of the protective box.

[0009] Optionally, the compensation mechanism includes a compensation body, and the main body has symmetrically formed grooves. The compensation body is located in the grooves and contacts the valve ball. A sleeve is fixedly connected to the outer wall of the compensation body, and a lead screw is threaded into the sleeve. The end of the lead screw away from the sleeve is fixedly connected to the output shaft of a servo motor, and the servo motor is embedded in the main body.

[0010] Optionally, a plurality of compression springs are fixedly connected to the inner wall of the groove in a circumferential direction, and the ends of the compression springs are fixedly connected to the compensator.

[0011] Optionally, mounting flanges are fixedly connected to both sides of the main body, and can be detachably connected to external pipes through the mounting flanges.

[0012] This utility model discloses the following technical effects: In use, the drive assembly drives the valve stem to rotate, which in turn drives the valve ball to rotate, thereby achieving the opening and closing functions. The drive assembly has a self-locking function, enabling it to adapt to high-pressure conditions. Furthermore, after prolonged use, wear will occur; the compensation mechanism ensures the valve ball remains in contact with the inner wall of the body, preventing leakage, reducing maintenance frequency, and saving costs. This utility model actively fills the wear gaps in the valve ball through the compensation mechanism, avoiding the sealing failure problem caused by friction in traditional ball valves. The rotating connection design between the body, valve ball, and valve stem, combined with the compensation mechanisms on both sides, forms a symmetrical force-bearing structure, effectively dispersing the impact force of high-pressure media and improving overall pressure resistance. The protective box isolates the drive assembly, preventing the intrusion of rainwater, dust, and other contaminants, extending the service life of internal precision components, and reducing the impact of external impacts on the transmission system. Attached Figure Description

[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a side view of the structure of the main body of this utility model;

[0016] In the diagram: 1. Body; 2. Mounting flange; 3. Valve ball; 4. Protective box; 5. Worm gear; 6. Connecting shaft; 7. Knob; 8. Worm wheel; 9. Valve stem; 10. Compensator; 11. Compression spring; 12. Sleeve; 13. Servo motor; 14. Groove. Detailed Implementation

[0017] 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.

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Reference Figures 1 to 2 As shown, this embodiment provides a wear-free, high-pressure resistant ball valve, including a body 1, a valve ball 3 rotatably connected inside the body 1, a valve stem 9 fixedly connected to the top of the valve ball 3, the top of the valve stem 9 extending out of the body 1 and being driven by a drive assembly, a protective box 4 sleeved on the outside of the drive assembly, the protective box 4 being used to prevent rainwater or dust from entering the interior, and compensation mechanisms symmetrically arranged on both sides of the body 1, the compensation mechanisms being used to fill the gaps after the valve ball 3 is worn.

[0020] In use, the drive assembly rotates the valve stem 9, which in turn rotates the valve ball 3, thus achieving the opening and closing functions. The drive assembly has a self-locking function, enabling it to operate under high pressure conditions. However, it will wear down over time. A compensation mechanism ensures that the valve ball 3 remains in contact with the inner wall of the body 1, preventing leakage, reducing maintenance frequency, and saving costs. This invention actively fills the wear gaps in the valve ball 3 through the compensation mechanism, avoiding the sealing failure problem caused by friction in traditional ball valves. The rotating connection design between the body 1, the valve ball 3, and the valve stem 9, combined with the compensation mechanisms on both sides, forms a symmetrical force-bearing structure, effectively dispersing the impact force of high-pressure media and improving overall pressure resistance. The protective box 4 isolates the drive assembly, preventing the intrusion of rainwater, dust, and other contaminants, extending the service life of internal precision components, and reducing the impact of external impacts on the transmission system.

[0021] Further refining the design, the drive assembly includes a worm gear 8 fixedly connected to the valve stem 9. The worm gear 8 is located inside the protective box 4, and it meshes with a worm 5, which is rotatably connected to the protective box 4. The helical transmission characteristics of the worm gear 8 and worm 5 have a self-locking function, ensuring that the valve stem 9 will not rotate on its own when there is no external driving force. This prevents the valve from rotating under high pressure conditions by ensuring the stability of the valve's opening and closing state and avoiding the risk of accidental leakage. Through the matching design of the number of threads in the worm 5 and the number of teeth in the worm gear 8, a large reduction ratio transmission is achieved, reducing the driving torque requirement and making manual or electric operation more effortless.

[0022] Further refining the design, a connecting shaft 6 is centrally connected to the worm gear 5. The connecting shaft 6 is rotatably connected to the protective box 4. The top of the connecting shaft 6 extends out of the protective box 4 and is fixedly connected to a knob 7, which is rotatably connected to the outer wall of the protective box 4. The fixed connection between the knob 7 and the connecting shaft 6 facilitates direct manual operation of the valve, allowing for rapid opening and closing, especially in situations without power or in emergencies, thus improving emergency response capabilities. The rotatable connection between the connecting shaft 6 and the protective box 4 uses a standard bearing structure, facilitating disassembly and maintenance. Furthermore, the exposed design of the knob 7 conforms to ergonomics, providing a better operating feel.

[0023] Further refining the design, the compensation mechanism includes a compensating body 10. A groove 14 is symmetrically formed within the main body 1, and the compensating body 10 is located within the groove 14, contacting the valve ball 3. A sleeve 12 is fixedly connected to the outer wall of the compensating body 10, and a lead screw is threaded into the sleeve 12. The end of the lead screw furthest from the sleeve 12 is fixedly connected to the output shaft of a servo motor 13, which is embedded within the main body 1. The servo motor 13 drives the lead screw to rotate, precisely controlling the displacement of the compensating body 10 through threaded transmission, achieving dynamic filling of wear gaps. Compared to traditional single spring compensation, this method offers higher precision and faster response. The compensating body 10 is embedded within the groove 14 of the main body 1, and the threaded design of the lead screw and sleeve 12 occupies little space, without increasing the overall size of the ball valve, making it suitable for installation space-constrained scenarios. The contact surface between the compensating body 10 and the valve ball 3 is coated with hard alloy or ceramic, combined with elastic deformation compensation under high-pressure media, ensuring the sealing surface remains in contact.

[0024] Further refining the design, several compression springs 11 are circumferentially fixedly connected to the inner wall of the groove 14, and the ends of the compression springs 11 are fixedly connected to the compensator 10. The compression springs 11 provide continuous axial thrust, ensuring that the compensator 10 remains in close contact with the valve ball 3 in the initial state or after slight wear, avoiding leakage caused by gaps. At the same time, the elastic characteristics of the compression springs 11 can absorb the vibration caused by high-pressure fluid impact, reduce the impact wear between the valve ball 3 and the compensator 10, and extend the service life of the seal.

[0025] Further refining the design, mounting flanges 2 are fixedly connected to both sides of the main body 1, allowing for detachable connection to external pipelines. The mounting flanges 2 enable bolted connections to the pipelines, eliminating the need for special tools during installation and disassembly, thus reducing maintenance costs and time. Furthermore, the dimensions of the mounting flanges 2 can be customized to fit pipelines of different diameters, meeting the needs of various scenarios such as petroleum, chemical, and nuclear power industries, and enhancing product versatility.

[0026] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only 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 limitations on this utility model.

[0027] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A non-wearing high pressure ball valve, characterized by: Includes a body (1), a valve ball (3) is rotatably connected inside the body (1), a valve stem (9) is fixedly connected to the top of the valve ball (3), the top of the valve stem (9) extends out of the body (1) and is connected to a drive assembly, a protective box (4) is sleeved on the outside of the drive assembly, the protective box (4) is used to prevent rainwater or dust from entering the interior, and a compensation mechanism is symmetrically arranged on both sides of the body (1), the compensation mechanism is used to fill the gap after the valve ball (3) is worn.

2. The non-wearing high-pressure ball valve according to claim 1, characterized in that: The drive assembly includes a worm gear (8) fixedly connected to the valve stem (9), the worm gear (8) being located inside the protective box (4), the worm gear (8) meshing with a worm (5), and the worm (5) being rotatably connected to the protective box (4).

3. The wearless high-pressure ball valve according to claim 2, characterized in that: The worm gear (5) has a connecting shaft (6) that is fixedly connected through the center. The connecting shaft (6) is rotatably connected to the protective box (4). The top of the connecting shaft (6) extends out of the protective box (4) and is fixedly connected to a knob (7). The knob (7) is rotatably connected to the outer wall of the protective box (4).

4. The non-wearing high pressure ball valve according to claim 1, characterized in that: The compensation mechanism includes a compensation body (10), and grooves (14) are symmetrically provided inside the body (1). The compensation body (10) is located inside the grooves (14). The compensation body (10) is in contact with the valve ball (3). A sleeve (12) is fixedly connected to the outer wall of the compensation body (10). A lead screw is threaded inside the sleeve (12). The output shaft of a servo motor (13) is fixedly connected to one end of the lead screw away from the sleeve (12). The servo motor (13) is embedded in the body (1).

5. The wearless high-pressure ball valve according to claim 4, characterized in that: A plurality of compression springs (11) are fixedly connected to the inner wall of the groove (14) in a fixed manner, and the ends of the compression springs (11) are fixedly connected to the compensator (10).

6. The non-wearing high pressure ball valve according to claim 1, characterized in that: The main body (1) is fixedly connected to two sides by mounting flanges (2), and can be detachably connected to external pipes through the mounting flanges (2).

Images