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CN-122014876-A - Ball valve self-locking structure and ball valve

CN122014876ACN 122014876 ACN122014876 ACN 122014876ACN-122014876-A

Abstract

The invention discloses a ball valve self-locking structure and a ball valve, which comprise a valve body, wherein 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, the inner wall of the first limiting sleeve is abutted against a first spring, one end of the first spring is abutted against a first limiting rod, when the ball valve self-locking structure is used, the ball valve self-locking structure is formed by taking out the device and placing the device at a designated position, bonding a scraping sleeve on a self-transmission circular ring at high temperature, sleeving a fluororubber sleeve on a silicon nitride ceramic valve ball, respectively connecting the first connecting sleeve and the second connecting sleeve at two ends of the valve body through pipelines, clamping and fixing a valve rod through a fixing sleeve, movably extending a valve rod through a fixing sleeve, finally clamping and locking the valve rod through the first limiting rod, and transmitting a medium.

Inventors

  • ZHANG CHONGYUAN

Assignees

  • 浙江永恒阀门有限公司

Dates

Publication Date
20260512
Application Date
20260413

Claims (8)

  1. 1. A ball valve self-locking structure and a ball valve are characterized by comprising a valve body (1), wherein a first connecting sleeve (2) is arranged at one end of the valve body (1), a second connecting sleeve (3) is arranged at the other end of the valve body (1), a first limit sleeve (4) is arranged on the outer wall of the valve body (1), a first spring (5) is abutted against the inner wall of the first limit sleeve (4), a first limit rod (6) is abutted against one end of the first spring (5), a second limit sleeve (7) is arranged on the outer wall of the valve body (1), a second spring (8) is abutted against the inner wall of the second limit sleeve (7), a second limit rod (9) is abutted against one end of the second spring (8), a valve handle (10) is arranged on the outer wall of the second limit rod (9), an extension frame (11) is arranged on the outer wall of the valve handle (10), a third spring (12) is welded on the outer wall of the valve handle (10), a first limit rod (13) is abutted against one end of the first spring (5), a second limit sleeve (16) is abutted against the outer wall (14) of the valve handle (14), a ceramic ball (16) is fixedly provided with a silicon nitride ball (16), the self-transmission circular ring (18) is arranged on the inner wall of the silicon nitride ceramic valve ball (16), and the scraping strip sleeve (19) is arranged on the outer wall of the self-transmission circular ring (18).
  2. 2. The self-locking structure of a ball valve and the ball valve of claim 1, wherein the first limit sleeve (4) is movably connected with the first limit rod (6), and one end of the first limit rod (6) is provided with an oblique angle.
  3. 3. The self-locking structure of the ball valve and the ball valve according to claim 1, wherein the second limit sleeve (7) is movably connected with the second limit rod (9), and the inner wall of the second limit sleeve (7) is in a hexagonal structure.
  4. 4. The self-locking structure of ball valve and ball valve according to claim 1, wherein the valve handle (10) is connected with the extension frame (11) in a clamping way, and the valve handle (10) is in an L-shaped structure.
  5. 5. The self-locking structure of a ball valve and the ball valve according to claim 1, wherein the outer wall of the valve handle (10) is tightly attached to the outer wall of the fixed sleeve (14), and the inner wall of the valve handle (10) is of a slotted design.
  6. 6. The self-locking structure of a ball valve and the ball valve according to claim 1, wherein the fixed sleeve (14) is in threaded connection with the valve rod (15), and the outer wall of the valve rod (15) is in threaded arrangement.
  7. 7. The ball valve self-locking structure and the ball valve according to claim 1, wherein the outer wall of the silicon nitride ceramic valve ball (16) is tightly attached to the inner wall of the fluororubber sleeve (17), and the diameter of the outer wall of the silicon nitride ceramic valve ball (16) is smaller than that of the inner wall of the fluororubber sleeve (17).
  8. 8. The self-locking structure of a ball valve and the ball valve as claimed in claim 1, wherein the silicon nitride ceramic valve ball (16) is in clamping connection with the self-transmission circular ring (18), and the inner wall of the self-transmission circular ring (18) is of an open-pore design.

Description

Ball valve self-locking structure and ball valve Technical Field The invention relates to the technical field of ball valves, in particular to a ball valve self-locking structure and a ball valve. Background Ball valves are widely used as fluid control elements in industrial pipeline systems, are widely used in the fields of petroleum, chemical industry, municipal administration, energy sources and the like by virtue of the advantages of quick opening and closing, excellent sealing performance, small flow resistance and the like, realize medium on-off by rotating a ball by 90 degrees, are convenient to operate and adapt to various pressure and temperature working conditions. In order to prevent the ball from rotating accidentally due to vibration, false touch by external force, pipeline fluid impact and other factors in the working process of the valve, medium leakage, system pressure abnormality and even safety accidents are caused, the self-locking structure becomes a key matching component of the ball valve, so that the ball valve self-locking structure and the ball valve are needed. The ball valve is used as a core control element of a pipeline system, is often applied to industrial scenes with frequent vibration, intensive personnel operation or more interference of external force, and a valve handle is susceptible to unexpected rotation under the condition of no locking constraint and influenced by factors such as pipeline fluid impact, equipment vibration, accidental collision or false touch. The unexpected action can directly lead the ball body to deviate from the preset opening and closing position, cause the problems of medium leakage, sudden system pressure change and the like, not only can possibly cause raw material waste and production interruption, but also can possibly induce serious safety accidents such as explosion, poisoning and the like in high-risk medium conveying scenes such as petroleum, chemical industry and the like, the basic requirements of the industrial production on the operation stability and safety of the valve can not be met, in the application scenes of high-pressure, high-temperature or large-caliber ball valves, the sealing acting force between the ball body and the valve seat is larger, the torque required by the opening and closing of the valve is obviously increased, an operator needs to apply larger acting force to finish the opening and closing of the valve, not only the labor intensity is high, but also the valve can not be rapidly switched due to insufficient operating force, especially in the scenes requiring quick operation of the valve, such as emergency shutdown, fault maintenance and the like, the emergency response efficiency of the system is influenced, the emergency response efficiency of the system is difficult to adapt to the requirements of industrial production on the operation convenience and the high efficiency of the valve, as the industrial pipeline medium usually contains dust, particles, viscous impurities or chemical sediments, the substances can flow along with the flowing through a part of the fluid in the opening and closing process of the valve, the flow channel is gradually increased along with the flow rate of the fluid, the part of the fluid is increased, the flow channel is greatly reduced, the flow channel is gradually increased, the flow channel is gradually has the effect is increased, and the flow channel is gradually increased, and the flow channel resistance is increased, and the factors are gradually can not cause the flow channel flow resistance is increased, and flow resistance is gradually, and flow is increased, and flow channel is caused when the flow channel is gradually has is increased, and has flow resistance is gradually flow factors are increased, and has flow resistance efficiency due to flow factors can be increased when the flow and has flow factors, under the action of viscous resistance of the wall surface of the channel, the section of the channel can form flow velocity gradient distribution, a region close to the inner wall of the channel can form a stagnation layer with extremely low flow velocity, when solid particle impurities are contained in a pipeline medium, the particles are difficult to continue flowing along with main fluid due to insufficient kinetic energy in the stagnation layer region, the particles are easy to sink to the inner wall of the valve ball channel or the vicinity of sealing surfaces at two ends of the channel under the combined action of gravity, buoyancy and wall surface adsorption force, the long-term accumulated settled impurities can aggravate abrasion between the valve ball and the valve seat, the tightness of a sealing pair is damaged, leakage occurs to the valve, the settled particle impurities can be blocked between the ball body and the valve seat when the valve is opened and closed, the rotation of the ball body is blocked, the operation flexibility of the valve is affected, t