Triple Eccentric Butterfly Valve formed after the third modification is widely used because of its good sealing and high temperature resistance. In the Triple Eccentric Butterfly Valve, the position of the stem determines the axial and radial eccentricity, and the third angle eccentricity is determined by the tilt of the butterfly vertebral body. Next, Beijing Rituo will focus on the analysis of the impact of the structural parameters of the Triple Eccentric Butterfly Valve on the interference phenomenon.

When the valve is fully closed, the butterfly plate contacts the two sealing surfaces of the valve seat completely and fits everywhere. The butterfly plate is rotated around the rotation axis at a certain angle. If no interference occurs during the rotation, the valve passes the interference test. Let P B e any point on the sealing surface of butterfly plate. Because the trajectory of P point revolving around the revolving axis is circular, and the plane M intersecting the sealing surface crossing P point and perpendicular revolving axis, the obtained curve is one or two parts of hyperbola in x [e - B / 2, e + B / 2]. If the trajectory of the circle is always in the interior of the hyperbolic trajectory within the width of the sealing surface during rotation, it means that the butterfly plate sealing surface will not interfere with the seat sealing surface. If the trajectory of the circle is in the outer part of the hyperbolic trajectory within the width of the sealing surface during rotation, the butterfly plate sealing surface will interfere with the seat sealing surface.

Using the program, the range of some parameters without interference can be obtained. The butterfly valves with DN = 200 mm and PN = 215 MPa are taken as examples for analysis.
From the point of view that butterfly plate does not interfere, the following conclusions are drawn. (1) With the increase of a, delta decreases first and then increases linearly. In order not to cause valve interference, a larger value of a should be selected. (2) With the increase of e, the value of delta decreases linearly, so e generally takes the value near the Zui small value. (3) With the increase of b, the value of delta decreases, so the value of B should not be too large. (4) With the increase of alpha, delta increases first and then decreases. Alpha should choose the value near the inflection point. _With the increase of beta, the value of delta increases approximately in a straight line, so beta should choose a larger value.
In the process of determining the parameters of Triple Eccentric Butterfly Valve, many parameters can only be determined in a certain range. In the process of selecting the parameters rationally, the main factors to be considered are sealing, moment and interference, and valve structure, etc. In the process of parameter determination, the method in this paper can be used to verify the range of parameters without interference, and then select parameters according to other requirements of valve structure design. This makes interference inspection more convenient and improves the efficiency of product design in the process of valve product design.
In the Triple Eccentric Butterfly Valve, the influence of the structural parameters change of theTriple Eccentric Butterfly Valve on the disc plate is discussed here today. More about the Triple Eccentric Butterfly Valve content, welcome to visit Beijing Ruito official website for viewing, if there is purchase demand, welcome to contact.