US-12618480-B2 - Ball valve

US12618480B2US 12618480 B2US12618480 B2US 12618480B2US-12618480-B2

Abstract

The present application provides a ball valve. The ball valve includes a valve body, a valve seat, and a valve rod. The valve seat is installed on the valve body. One end of the valve rod is rotatably installed in the valve body, and the other end of the valve rod extends out of the valve body via the valve seat. A position of the valve rod penetrating through the valve seat is provided with a limiting convex ring. An end of the valve seat away from the valve body is provided with a convex edge. And an end of the convex edge towards the valve body abuts against the limiting convex ring to limit the valve rod from separating from the valve body.

Inventors

Zhouyang SHOU
Yongbin XUAN
Ligang HUA

Assignees

ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20240723
Priority Date: 20220126

Claims (7)

1 . A ball valve comprising a valve body, a valve seat and a valve rod, wherein the valve seat is installed on the valve body, one end of the valve rod is rotatably installed in the valve body, the other end of the valve rod extends out of the valve body via the valve seat; a portion of the valve rod penetrating through the valve seat is provided with a limiting convex ring, an end of the valve seat away from the valve body is provided with a convex edge, an end of the convex edge towards the valve body abuts against the limiting convex ring to prevent the valve rod from separating from the valve body; the convex edge is integrated with the valve seat; a limiting component is provided on the valve seat, the valve rod is capable of abutting against and fitting with the limiting component to restrict a maximum rotating angle of the valve rod in the valve seat as 90°; the limiting component is disposed on an inner wall of the convex edge; and a gap is formed between an end of the limiting component towards the valve body and the limiting convex ring.
2 . The ball valve of claim 1 , wherein the convex edge abuts against the limiting convex ring by being in contact with each other.
3 . The ball valve of claim 2 , wherein the convex edge is provided as a circular ring.
4 . The ball valve of claim 1 , wherein along an axis of the valve seat, a size of the convex edge is not less than 3 mm.
5 . The ball valve of claim 1 , wherein the limiting convex ring is integrated with the valve rod.
6 . The ball valve of claim 1 , wherein a sealing ring is embedded into the limiting convex ring, and the valve rod is assembled with and sealed with the valve seat by the sealing ring.
7 . The ball valve of claim 1 , wherein the valve rod is capable of abutting against and fitting with the limiting component by being in contact with each other.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application is a continuation of international patent application No. PCT/CN2023/072349, filed on Jan. 16, 2023, which claims priority to Chinese patent application No. 202220260076.8, filed on Jan. 26, 2022, and titled “BALL VALVE”. The content of the above identified disclosure is hereby incorporated herein in its entirety by reference. TECHNICAL FIELD The present disclosure relates to a field of flow rate controlling technology, and in particular, to a ball valve. BACKGROUND A ball valve includes an opening or closing element driven by a valve rod and a valve rotating around an axis of the ball valve. In particular, the valve rod in the ball valve is restricted on the valve body by a valve seat installed on the valve body, to prevent the valve rod from being pushed out of the valve body by a medium during an operation of the ball valve. At present, a limiting structure of a valve rod on a ball valve in related art is usually provided at a position where the valve rod penetrates through the valve seat, which realizes a limitation for the valve rod by the limiting component being in contact with the valve seat. It can be understood that the ball valve with the above structure requires an outer diameter of a limit structure on the valve rod to be greater than an inner diameter of the valve seat. This requires that an outer diameter of a blank part used to prepare the valve rod should reach an inner diameter of the valve seat, and then the blank part is machined by a turning process to produce the valve rod, which requires a lot of materials, causing not only high material costs, but also a long length of the blank part being turned, resulting in increasing a machining cost. SUMMARY According to various embodiments of the present disclosure, a ball valve for solving above technical problem is provided. A ball valve includes a valve body, a valve seat and a valve rod. The valve seat is installed on the valve body. One end of the valve rod is rotatably installed in the valve body, and the other end of the valve rod extends out of the valve body via the valve seat. A portion of the valve rod penetrating through the valve seat is provided with a limiting convex ring, an end of the valve seat away from the valve body is provided with a convex edge, and an end of the convex edge towards the valve body abuts against the limiting convex ring to prevent the valve rod from separating from the valve body. In one embodiment, the convex edge abuts against the limiting convex ring by being in contact with each other. In one embodiment, the convex edge is in a circular ring shape. In one embodiment, along an axis direction of the valve seat, a size of the convex edge is not less than 3 mm. In one embodiment, the limiting convex ring is integrated with the valve rod. In some embodiments, the convex edge is integrated with the valve seat. In one embodiment, a sealing ring is embedded into the limiting convex ring, and the valve rod is assembled with and sealed with the valve seat by the sealing ring. In one embodiment, a limiting component is provided on the valve seat, the valve rod is capable of abutting against the limiting component to restrict a maximum rotating angle of the valve rod in the valve seat as 90°. In one embodiment, the valve rod is capable of abutting against the limiting component by one surface being in contact with another surface. In one embodiment, the limiting component is disposed on an inner wall of the convex edge. In one embodiment, an end surface of the limiting component towards the valve body abuts against the limiting convex ring; or a gap is formed between an end of the limiting component towards the valve body and the limiting convex ring. Details of one or more embodiments of this disclosure are presented in the attached drawings and descriptions below. And other features, purposes and advantages of this disclosure will become apparent from the description, drawings and claims. BRIEF DESCRIPTION OF THE DRAWINGS For a better description and illustration of embodiments and/or examples of those disclosures disclosed herein, reference may be made to one or more attached drawings. Additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the disclosed disclosures, currently described embodiments and/or examples, and currently understood best modes of these disclosures. FIG. 1 is a cross-sectional schematic diagram of a ball valve in one or more embodiments of the present disclosure. FIG. 2 is a bottom view of a valve seat in one or more embodiments of the present disclosure. FIG. 3 is a cross-sectional schematic diagram of a valve seat in one or more embodiments of the present disclosure. FIG. 4 is a schematic diagram of a valve rod in one or more embodiments of the present disclosure. FIG. 5 is a bottom view of a valve seat and a valve rod when a limiting component of the valve seat abuts ag