Ball valve self-locking structure and ball valve

Abstract

The ball valve self-locking structure comprises a valve body, one end of the valve body is provided with a first connecting sleeve, the other end of the valve body is provided with a second connecting sleeve, the outer wall of the valve body is provided with a first limiting sleeve, and the inner wall of the first limiting sleeve abuts against a first spring; when the device is used, the device is taken out and placed at a designated position, the scraping strip sleeve is used for carrying out high-temperature bonding on the self-rotating circular ring, then the fluororubber sleeve is used for sleeving the silicon nitride ceramic valve ball, and then the first connecting sleeve and the second connecting sleeve at the two ends of the valve body are in pipeline connection correspondingly; according to the ball valve self-locking structure and the ball valve, the valve rod is clamped and fixed through the valve handle, the valve rod is fixed through the fixing sleeve in a threaded mode, the valve handle is movably extended through the extension frame, finally, the valve handle is clamped and locked through the first limiting rod, a medium is conveyed, and therefore the ball valve self-locking structure and the ball valve are completed.

Description

Technical Field

[0001] This invention relates to the field of ball valve technology, specifically to a ball valve self-locking structure and a ball valve. Background Technology

[0002] Ball valves, widely used fluid control components in industrial pipeline systems, are extensively employed in petroleum, chemical, municipal, and energy fields due to their advantages such as rapid opening and closing, excellent sealing performance, and low flow resistance. They achieve media flow control through a 90-degree rotation of the ball, offering convenient operation and adaptability to various pressure and temperature conditions. To prevent accidental ball rotation during operation due to vibration, external force, or pipeline fluid impact, which could lead to media leakage, abnormal system pressure, or even safety accidents, a self-locking structure has become a crucial component of ball valves. Therefore, we need a ball valve with a self-locking structure and a suitable ball valve design.

[0003] Currently used ball valves with self-locking structures are often applied in industrial settings with frequent vibrations, dense personnel operations, or a lot of external interference. Without locking constraints, the valve handle is easily affected by factors such as pipeline fluid impact, equipment vibration, accidental collisions, or accidental contact, resulting in unexpected rotation. Such unexpected movements can directly cause the ball to deviate from the preset opening and closing position, leading to problems such as media leakage and sudden changes in system pressure. This can not only cause material waste and production interruption, but also potentially induce serious safety accidents such as explosions and poisoning in high-risk media transportation scenarios such as oil and chemical industries. It fails to meet the basic requirements of industrial sectors for valve operation stability and safety. In high-pressure, high-temperature, or large-diameter ball valve applications, the sealing force between the ball and the valve seat is large, significantly increasing the torque required for valve opening and closing. Operators need to apply considerable force to complete the valve opening and closing, resulting in high labor intensity and potentially preventing the valve from quickly switching states due to insufficient operating force. Especially in scenarios requiring rapid valve operation, such as emergency shutdowns and fault repairs, the lack of an extended, force-saving design for the valve handle can delay operation opportunities, affecting system emergency response efficiency and failing to meet the demands of industrial production for convenient and efficient valve operation. Since industrial pipeline media often contain dust, particulate matter, viscous impurities, or chemical deposits, these substances flow through the valve ball's channel with the fluid during valve opening and closing. Some impurities adhere to the channel surface due to changes in fluid velocity and the adsorption effect of the channel wall. Over time, the attached impurities gradually accumulate and solidify, forming a deposition layer of increasing thickness. This causes the effective flow cross-sectional area of ​​the valve ball passage to gradually decrease, i.e., the flow channel narrows. This narrowing directly increases fluid resistance, reduces the flow output efficiency of the pipeline system, and in severe cases, can lead to the deposition layer clogging the passage, preventing the valve from opening and closing properly and affecting the stable operation of the entire pipeline system. When fluid flows through the valve ball passage, due to the viscous resistance of the passage wall, a velocity gradient distribution forms across the passage cross-section. A stagnant layer with extremely low velocity forms near the inner wall of the passage. When the pipeline medium contains... When solid particulate impurities are present, these particles lack sufficient kinetic energy in the stagnant zone and are unable to continue flowing with the main fluid. Under the combined action of gravity, buoyancy, and wall adhesion, they tend to settle onto the inner wall of the valve ball passage or near the sealing surfaces at both ends of the passage. Long-term accumulation of settled impurities will exacerbate the wear between the valve ball and the valve seat, damage the sealing performance of the sealing pair, and cause valve leakage. The settled particulate impurities may also get stuck between the ball and the valve seat when the valve is opened and closed, causing the ball to rotate in a restricted manner, affecting the flexibility of valve operation, and in severe cases, even causing damage to the valve ball or valve seat, shortening the service life of the ball valve. Summary of the Invention

[0004] The purpose of this invention is to provide a self-locking structure for a ball valve and a ball valve in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A ball valve self-locking structure and a ball valve, comprising a valve body, a first connecting sleeve at one end of the valve body, a second connecting sleeve at the other end of the valve body, a first limiting sleeve on the outer wall of the valve body, a first spring abutting the inner wall of the first limiting sleeve, a first limiting rod at one end of the first spring, a second limiting sleeve on the outer wall of the valve body, a second spring abutting the inner wall of the second limiting sleeve, a second limiting rod at one end of the second spring, a valve handle mounted on the outer wall of the second limiting rod, an extension bracket mounted on the outer wall of the valve handle, a third spring welded to the outer wall of the valve handle, an abutting bracket welded to one end of the third spring, a fixing sleeve abutting the outer wall of the valve handle, a valve stem mounted on the inner wall of the fixing sleeve, a silicon nitride ceramic valve ball at one end of the valve stem, a fluororubber sleeve attached to the outer wall of the silicon nitride ceramic valve ball, a self-rotating ring mounted on the inner wall of the silicon nitride ceramic valve ball, and a scraper sleeve mounted on the outer wall of the self-rotating ring.

[0006] Preferably, the first limiting sleeve is movably connected to the first limiting rod, and one end of the first limiting rod is set at an angle.

[0007] Preferably, the second limiting sleeve is movably connected to the second limiting rod, and the inner wall of the second limiting sleeve is hexagonal.

[0008] Preferably, the valve handle is engaged with the extension bracket, and the valve handle is configured with an "L" shape.

[0009] Preferably, the outer wall of the valve handle is tightly fitted to the outer wall of the fixed sleeve, and the inner wall of the valve handle has a slotted design.

[0010] Preferably, the fixing sleeve is threadedly connected to the valve stem, and the outer wall of the valve stem is threaded.

[0011] Preferably, the outer wall of the silicon nitride ceramic valve ball is tightly fitted to the inner wall of the fluororubber sleeve, and the outer diameter of the silicon nitride ceramic valve ball is smaller than the inner diameter of the fluororubber sleeve.

[0012] Preferably, the silicon nitride ceramic valve ball is engaged with the self-rotating ring, and the inner wall of the self-rotating ring is designed with an opening.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. The first limiting sleeve and the first limiting rod are assembled using a movable connection method, with an elastic connection established between them by a first spring. This allows the first limiting rod to have the ability to extend and retract along the axial direction. To meet locking requirements, the first limiting rod adopts a hexagonal cross-section design, and its end facing the valve handle is machined into a beveled structure. This beveled design can effectively reduce the resistance when the valve handle is in contact, achieving smooth force transmission. When the operator rotates the valve handle to the preset open / close position, the end face of the valve handle will contact the beveled surface of the first limiting rod. As the contact force is applied, the first limiting rod moves along the axial direction under the elastic force of the first spring until its hexagonal rod body completely fits and engages with the preset internal hexagonal opening inside the valve handle. Due to the hexagonal structure... Featuring multi-faceted fit and anti-relative rotation characteristics, it forms a stable mechanical limit after locking, effectively restricting accidental rotation of the valve handle, thus achieving reliable self-locking of the valve handle. This completely avoids unexpected valve actions caused by vibration, accidental contact, or other factors. The extension bracket is movably connected to the valve handle, significantly increasing the operating lever arm. Based on the lever principle, it effectively reduces the operating torque required to open and close the valve, allowing operators to easily open or close the valve without applying excessive force. In normal working conditions or confined spaces, the extension bracket can be shortened, allowing direct operation through the valve handle without affecting the normal use of the valve. This achieves an organic combination of self-locking function and labor-saving operation, ensuring the safety of valve operation while improving operational convenience under different working conditions, thus broadening its applicability.

[0014] 2. The inner wall of the silicon nitride ceramic valve ball is processed with high-precision machining, forming a clearance fit with the self-rotating ring. This ensures smooth rotation of the self-rotating ring along the inner wall of the valve ball, and the clearance between the two is strictly controlled within a reasonable range. This ensures that the flow of media is not affected, and also avoids jamming or uneven wear during rotation. The inner wall has a ring-shaped array of openings distributed along the circumference. The number, diameter, and arrangement of these openings have been optimized through fluid dynamics simulation to ensure a uniform turbulence effect when the media flows through them. The outer wall of the self-rotating ring... The high-temperature bonding method reliably installs a scraper sleeve, which is made of reinforced PTFE wear-resistant elastic material. Its outer surface adheres to the inner wall of the silicon nitride ceramic valve ball, with the adhesion gap controlled at the micron level. This ensures cleaning effectiveness while avoiding scratches on the inner wall of the valve ball. When the pipeline medium flows through the flow channel of the silicon nitride ceramic valve ball, a portion of the medium is diverted through the annular array of openings on the inner wall of the self-rotating ring. The impact force generated by the diverted fluid and the shear force of the mainstream medium act together on the self-rotating ring, driving it to continuously rotate along the inner wall of the silicon nitride ceramic valve ball. During the rotation of the self-rotating annular ring, the scraper sleeve on its outer wall simultaneously performs a circular motion. Through close contact and friction with the inner wall of the silicon nitride ceramic valve ball, it scrapes away solid particles, colloids, scale, and other deposits adhering to the inner wall of the silicon nitride ceramic valve ball in real time. This effectively prevents the flow channel from narrowing due to deposit accumulation, ensuring that the effective flow cross-sectional area of ​​the flow channel remains stable over a long period. This avoids system pressure fluctuations or a decrease in media delivery efficiency caused by increased flow resistance. The annular array of openings guides the medium to form a multi-directional flow field, breaking the low-speed fluid state in the stagnant layer region and enhancing the fluid... The increased turbulence and continuous rotation of the self-rotating ring further aggravate the flow field disturbance, significantly increasing the fluid velocity in the stagnant layer region. This reduces the probability of particulate impurities adhering due to gravity settling and inertial deposition. This structure inhibits the settling and accumulation of particulate impurities in the flow channel of the silicon nitride ceramic valve ball from the source, avoiding wear on the sealing surface of the silicon nitride ceramic valve ball caused by impurities and preventing the problem of poor opening and closing of the silicon nitride ceramic valve ball caused by impurities. This significantly improves the reliability and service life of the valve in particulate media or under long-term operating conditions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a ball valve self-locking structure and a front view of the ball valve structure according to the present invention. Figure 2 This is a schematic diagram of a ball valve self-locking structure and a ball valve from a vertical or rear view according to the present invention. Figure 3 This is a schematic diagram of the self-locking structure of a ball valve and a vertical sectional view of the ball valve according to the present invention. Figure 4 This is a schematic diagram of the self-locking structure of a ball valve and the split structure of the ball valve from a vertical perspective, according to the present invention. Figure 5 This is a schematic diagram of a ball valve self-locking structure and a ball valve handle component structure according to the present invention. Figure 6 This is a schematic diagram of a ball valve self-locking structure and a combination structure of the ball valve's self-rotating ring and scraper sleeve parts according to the present invention.

[0016] In the diagram: 1. Valve body; 2. First connecting sleeve; 3. Second connecting sleeve; 4. First limiting sleeve; 5. First spring; 6. First limiting rod; 7. Second limiting sleeve; 8. Second spring; 9. Second limiting rod; 10. Valve handle; 11. Extension frame; 12. Third spring; 13. Contact frame; 14. Fixing sleeve; 15. Valve stem; 16. Silicon nitride ceramic valve ball; 17. Fluororubber sleeve; 18. Self-rotating ring; 19. Scraper sleeve. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1-6 This invention provides a self-locking structure for a ball valve and a technical solution for the ball valve: A self-locking structure for a ball valve and the ball valve itself include a valve body 1. A first connecting sleeve 2 is provided at one end of the valve body 1, and a second connecting sleeve 3 is provided at the other end. A first limiting sleeve 4 is provided on the outer wall of the valve body 1. A first spring 5 abuts against the inner wall of the first limiting sleeve 4, and one end of the first spring 5 abuts against a first limiting rod 6. A second limiting sleeve 7 is provided on the outer wall of the valve body 1. A second spring 8 abuts against the inner wall of the second limiting sleeve 7, and one end of the second spring 8 abuts against a second limiting rod 9. A valve handle is mounted on the outer wall of the second limiting rod 9. 10. An extension bracket 11 is installed on the outer wall of the valve handle 10. A third spring 12 is welded to the outer wall of the valve handle 10. A contact bracket 13 is welded to one end of the third spring 12. A fixing sleeve 14 is abutted against the outer wall of the valve handle 10. A valve stem 15 is installed on the inner wall of the fixing sleeve 14. A silicon nitride ceramic valve ball 16 is provided at one end of the valve stem 15. A fluororubber sleeve 17 is attached to the outer wall of the silicon nitride ceramic valve ball 16. A self-rotating ring 18 is installed on the inner wall of the silicon nitride ceramic valve ball 16. A scraper sleeve 19 is installed on the outer wall of the self-rotating ring 18.

[0019] The first limiting sleeve 4 is movably connected to the first limiting rod 6, and one end of the first limiting rod 6 is set at an angle.

[0020] The second limiting sleeve 7 is movably connected to the second limiting rod 9, and the inner wall of the second limiting sleeve 7 is set with a hexagonal structure.

[0021] The valve handle 10 is engaged with the extension bracket 11, and the valve handle 10 is configured with an "L" shape.

[0022] The outer wall of the valve handle 10 fits tightly against the outer wall of the fixed sleeve 14, and the inner wall of the valve handle 10 has a slotted design.

[0023] The fixed sleeve 14 is threadedly connected to the valve stem 15, and the outer wall of the valve stem 15 is threaded.

[0024] The outer wall of the silicon nitride ceramic valve ball 16 is tightly fitted to the inner wall of the fluororubber sleeve 17, and the outer diameter of the silicon nitride ceramic valve ball 16 is smaller than the inner diameter of the fluororubber sleeve 17.

[0025] The silicon nitride ceramic valve ball 16 is engaged with the self-rotating ring 18, and the inner wall of the self-rotating ring 18 is designed with an opening.

[0026] It should be noted that the present invention is a ball valve self-locking structure and ball valve. In use, the device is taken out and placed in the designated position. The scraper sleeve 19 is bonded to the self-rotating ring 18 at high temperature. Then, the fluororubber sleeve 17 is fitted onto the silicon nitride ceramic valve ball 16. Then, the first connecting sleeve 2 and the second connecting sleeve 3 at both ends of the valve body 1 are connected to the pipeline respectively. Then, the valve handle 10 is engaged and fixed to the valve stem 15. Then, the fixing sleeve 14 is threaded and fixed to the valve stem 15. Then, the valve handle 10 is extended to the extension frame 11. Finally, the first limiting rod 6 is engaged and locked to the valve handle 10 to transmit the medium. In this way, a ball valve self-locking structure and ball valve are completed.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-locking structure for a ball valve and a ball valve thereof, characterized in that: The valve includes a valve body (1), one end of which is provided with a first connecting sleeve (2), and the other end of which is provided with a second connecting sleeve (3). A first limiting sleeve (4) is provided on the outer wall of the valve body (1), the inner wall of which abuts against a first spring (5), one end of which abuts against a first limiting rod (6). A second limiting sleeve (7) is provided on the outer wall of the valve body (1), the inner wall of which abuts against a second spring (8), one end of which abuts against a second limiting rod (9). A valve handle (10) is installed on the outer wall of the second limiting rod (9). An extension bracket (11) is installed on the outer wall of the valve handle (10). A third spring (12) is welded to the outer wall of the valve handle (10). An abutment bracket (13) is welded to one end of the third spring (12). A fixing sleeve (14) abuts the outer wall of the valve handle (10). A valve stem (15) is installed on the inner wall of the fixing sleeve (14). A silicon nitride ceramic valve ball (16) is provided at one end of the valve stem (15). A fluororubber sleeve (17) is attached to the outer wall of the silicon nitride ceramic valve ball (16). A self-rotating ring (18) is installed on the inner wall of the silicon nitride ceramic valve ball (16). A scraper sleeve (19) is installed on the outer wall of the self-rotating ring (18).

2. The ball valve self-locking structure and ball valve according to claim 1, characterized in that: The first limiting sleeve (4) is movably connected to the first limiting rod (6), and one end of the first limiting rod (6) is set at an angle.

3. The ball valve self-locking structure and ball valve according to claim 1, characterized in that: The second limiting sleeve (7) is movably connected to the second limiting rod (9), and the inner wall of the second limiting sleeve (7) is set with a hexagonal structure.

4. The ball valve self-locking structure and ball valve according to claim 1, characterized in that: The valve handle (10) is engaged with the extension bracket (11), and the valve handle (10) is configured with an "L" shape.

5. The ball valve self-locking structure and ball valve according to claim 1, characterized in that: The outer wall of the valve handle (10) is tightly fitted with the outer wall of the fixing sleeve (14), and the inner wall of the valve handle (10) is designed with a slot.

6. The ball valve self-locking structure and ball valve according to claim 1, characterized in that: The fixing sleeve (14) is threadedly connected to the valve stem (15), and the outer wall of the valve stem (15) is threaded.

7. The ball valve self-locking structure and ball valve according to claim 1, characterized in that: The outer wall of the silicon nitride ceramic valve ball (16) is tightly fitted to the inner wall of the fluororubber sleeve (17), and the outer diameter of the silicon nitride ceramic valve ball (16) is smaller than the inner diameter of the fluororubber sleeve (17).

8. The ball valve self-locking structure and ball valve according to claim 1, characterized in that: The silicon nitride ceramic valve ball (16) is engaged with the self-rotating ring (18), and the inner wall of the self-rotating ring (18) is designed with an opening.

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