Assembling fixture of annular elastic structure, assembling method and ball valve

Abstract

The invention relates to the technical field of the annular structure assembly and in particular to an assembling fixture of an annular elastic structure. The assembling fixture of the annular elasticstructure comprises a frustum-shaped workpiece matched with a piece to be assembled, wherein the frustum-shaped workpiece has a conical surface of which a diameter is gradually increased along an axial direction from the first end away from the piece to be assembled to the second end adjacent to the piece to be assembled; a sliding workpiece, wherein the sliding workpiece is provided with a cavity matched with the conical surface of the frustum-shaped workpiece, and used for pushing the annular elastic structure placed on the first end of the frustum-shaped workpiece to a preset position of the piece to be assembled along the conical surface under the action of an external force; and a force applying workpiece, wherein the force applying workpiece has a force applying surface which is slid along the outer side wall of the piece to be assembled under the action of the external force so that an acting force opposite to a deformation direction thereof is applied to the annular elastic structure on the outer side wall. The invention further discloses an assembling method of the annular elastic structure and a ball valve. The assembling fixture is capable of solving defects in the prior art that annular elastic installation is difficult and assembling efficiency is low.

Description

technical field

[0001] The invention relates to the technical field of ring structure assembly, in particular to a ring elastic structure assembly tool, assembly method and ball valve. Background technique

[0002] O-rings are used as seals and are widely used in the valve industry. However, due to the corrosion resistance of the rubber material itself and temperature limitations, valves in some industries cannot use O-rings as seals. In recent years, as one of the alternatives to O-rings, Vise rings have been more and more widely used in the valve industry. The panseal ring is a U-shaped Teflon high-performance seal with a special spring inside. The appropriate spring force plus the system fluid pressure pushes the sealing lip (surface) out and gently presses the metal surface to be sealed. Produces a very good seal.

[0003] Such as figure 1 As shown, the ball valve with O-ring structure, because the O-ring is a rubber product, has excellent tensile properties, and can...

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