A high temperature hard seal fixed ball valve
A fixed ball valve and hard seal technology, which is applied to valve devices, cocks including cut-off devices, mechanical equipment, etc., can solve problems such as unreliable sealing, poor control of dimensional tolerances, and valves that are easy to swell and fail, so as to ensure reliable sealing performance, the effect of solving slack leakage
Active Publication Date: 2021-11-30
FANGZHENG VALVE GRP
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Problems solved by technology
[0003] There are mainly two types of existing high-temperature hard-sealed fixed ball valve seat structures. One is that a graphite sealing ring is provided between the valve seat and the valve seat installation groove, and the spring force pushes the spring support ring to press the graphite sealing ring to seal. This kind of sealing structure is unreliable in sealing at high temperature, easy to loosen and leak, and the dimensional tolerance between the matching parts is not easy to control; if the gap is too small, the valve will easily swell and fail under high temperature conditions; if the gap is too large, it is not conducive to seal
The other is that after the graphite sealing ring is placed in the installation groove of the valve seat, the graphite sealing ring is directly pressed with a metal pressure ring on it, and the valve seat is pushed by a spring to achieve sealing, but the disadvantage of this structure is that the pre-compression of the graphite sealing ring is not easy to control If you press too much, the valve seat will be "locked" and lose the piston function; if you press too little, the valve seat will easily leak, which will affect the normal use of the valve.
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[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0029] refer to figure 1 and figure 2 , a high-temperature hard-sealed fixed ball valve, including a valve body, the valve body includes a middle body 1.1, a left body 1.2, and a right body 1.3, the left body 1.2 and the right body 1.3 are respectively arranged on opposite sides of the middle body 1.1, and the left body 1.2 is fixedly connected with the middle body 1.1, and the right body 1.3 is fixedly connected with the middle body 1.1. Both the left body 1.2 and the right body 1.3 are provided with installation grooves 2, the middle body 1.1 is installed with a valve stem 3 pierced into the inside of the middle body 1.1, and the end of the valve stem 3 located inside the middle body 1.1 is provided with a ball 4, the installation groove 2 are provided with a valve seat 5 that cooperates with the ball 4 to form a seal. An installation distance 6 is form...
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The invention discloses a high-temperature hard-sealed fixed ball valve, which comprises a valve body and an installation groove arranged in the valve body. One end is provided with a ball, and the installation groove is provided with a valve seat that cooperates with the ball to form a seal. The gap between the first sealing member, the valve body is provided with an adjustment mechanism for adjusting the sealing level of the first sealing member. The present invention has the following advantages and effects: the present invention can not only solve the slack leakage at high temperature by adjusting the first sealing member online, but also realize the normal reciprocating movement of the valve seat and ensure the sealing reliability.
Description
technical field [0001] The invention relates to a valve, in particular to a high-temperature hard-seal fixed ball valve. Background technique [0002] With the development of industrial modernization, various new technological processes are constantly emerging. While petroleum, chemical, metallurgy, electric power and other fields are in line with international standards, higher requirements are put forward for hard-sealed ball valves, that is, hard-sealed ball valves are required to have high temperature resistance, Wear-resistant and erosion-resistant, anti-scaling, fast cut-off, high pressure, medium containing particles, frequent opening and closing, fast opening and closing speed, and require good sealing performance and high reliability of the valve. Therefore, the hard-sealed ball valve must have a perfect structural design. The conventional soft seal is replaced by a graphite seal to reduce the wear and erosion of the seat seal pair, improve the sealing performance a...
Claims
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IPC IPC(8): F16K5/06F16K5/20
CPCF16K5/0663F16K5/0673F16K5/201F16K5/202
Inventor 孙曾兴张慧乐何永泉焦伦龄方品田
Owner FANGZHENG VALVE GRP