Mounted online maintenance ball valve
A technology of ball valve and top loading, which is applied in the direction of valve details, valve device, valve shell structure, etc., can solve the problems of ball valve leakage, pipeline system leakage, etc., and achieve the effect of reliable structure, improved work efficiency and convenient maintenance
Active Publication Date: 2014-06-18
SHENJIANG VALVE
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Problems solved by technology
[0007] In order to solve the technical problem of the leakage point of the ball valve in the prior art, avoid the leakage of the pipeline system when the ball valve is working under special working conditions such as high temperature, high pressure, flammable, explosive, toxic, and harmful substances, and realize the fast installation of the top entry ball valve. disassembly, the present invention provides a top-loading online maintenance ball valve for large-caliber special working conditions
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Embodiment Construction
[0039] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0040] Such as figure 1As shown, the present invention provides a top-loading online maintenance ball valve, which includes: a valve body 1, a valve seat 2, a valve cover 20, a ball 7 placed in the two valve seats 2, and an actuator 3. Wherein the valve body 1 comprises a hollow valve cavity 11, the first inner circular surface 112 and the second inner circular surface 113 are formed in the valve cavity 11, the first inner circular surface 112 is arranged near the middle part of the valve cavity 11, and its inner diameter is larger than The inner diameter of the second inner circular surface 113; the valve seat 2 is symmetrically placed in the valve cavity 11, and a convex ring 21 is formed on its outer circular surface, and the outer ...
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The invention discloses a mounted online maintenance ball valve, which comprises a valve body, a valve seat and an actuating mechanism, wherein the valve body comprises a hollow valve cavity; the valve seat is arranged on an excircle surface in the valve cavity to form a convex ring; the excircle surface of the convex ring is in movable sealing fit with an inner circle surface of the valve body; the actuating mechanism is a pressing ring, is sleeved on the excircle surface of the valve seat and is relatively and fixedly connected with the valve body; the pressing ring is in sliding sealing fit with the valve seat; the excircle surface of the pressing ring is in sliding sealing fit with the inner circle surface of the valve cavity; the pressing ring, the valve body and the valve seat are enclosed to form a closed pressure cavity; a pressure channel which is respectively communicated with the pressure cavity and the pressure source is formed in the pressing ring; when a pressure medium is input into the pressure channel, the valve seat is pushed to move away from the middle of the valve cavity through axial thrust of the pressure medium acting on the convex ring. A pressure inlet is not formed on the outer side of the valve body, the hidden danger of leakage of the valve body is avoided, and the mounted online maintenance ball valve is simple in structure and does not occupy a space in the valve cavity.
Description
technical field [0001] The invention relates to the field of fixed ball valves, in particular to a top-mounted on-line maintenance ball valve. Background technique [0002] At present, the demand for top-mounted ball valves with large and medium diameters and medium and high pressures is increasing. With the continuous upgrading of pipeline system maintenance requirements, it is convenient for online maintenance to prevent outflow of media (especially media that are toxic, harmful, flammable, explosive and polluting) environment) in the stricter case. Chinese patent document CN202149242U discloses a top-mounted ball valve, which relates to the technical field of fluid control, and aims to solve the technical problems of the existing item-mounted ball valves, such as complicated seat return mechanism and difficulty in online maintenance. The top-mounted ball valve in this patent document includes a spring seat with external thread sleeved on the outer circumference of the va...
Claims
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IPC IPC(8): F16K5/06F16K5/20F16K27/06
Inventor 殷连波黄道云叶际俊林考
Owner SHENJIANG VALVE