An assembly method of a cryogenic top entry ball valve
An assembly method and assembly technology, which are applied in the direction of cocks, valve devices, and hand-held tools including cutting devices, can solve the problems of leakage of medium, hidden safety hazards of screw plugs, unreliable structure, etc., so as to avoid leakage and prevent leakage. Achieve online maintenance and improve sealing reliability
Active Publication Date: 2022-03-29
JIANGSU SHENTONG VALVE
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Problems solved by technology
One is to process four threaded holes symmetrically front and back on the valve body, and design the head of the valve seat into a special structure with a slope. The external adjustment rod is used to withstand the valve seat, and then the ball is installed, and then the adjustment is removed. Rod tooling, use four screw plugs to tighten the threaded holes, so as to realize the upper assembly of the valve. Although this structure can meet the online maintenance function, it adds four leakage points, which is easy to cause medium leakage
At the same time, when designing high-pressure valves, such a structure is unreliable, and there is a potential safety hazard that the screw plug is blown out by the high-pressure medium
Another widely used cryogenic top-entry ball valve structure is to pull the valve seat assembly away from both sides of the valve channel by means of tooling, and then install the ball. Compared with the first structure, this structure has the advantage of reducing Leakage points have been eliminated, but the function of online maintenance cannot be satisfied
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[0022] As shown in the figure, an assembly method of a cryogenic top-entry ball valve, a cryogenic top-entry ball valve includes: a valve body 1, a spring seat 2, a valve seat retainer 4, and the inner cavity of the valve body 1 is provided with a boss 15, The head of the valve seat holder 4 is provided with a thread, the thread is provided with a nut 3, and the spring seat 2 is provided with a card slot;
[0023] A method for assembling a cryogenic top entry ball valve comprises the following steps:
[0024] Step 1, place the tooling assembly 7 vertically on the operating platform 8, put the inner hole of the valve seat holder 4 on the tooling assembly 7, install the spring seat 2, spring 6, and pan plug 5 in sequence to form the valve seat at the outlet end Assembly 17 and inlet port valve seat assembly 18;
[0025] Step 2: Lift the valve seat assembly 17 at the outlet end from the upper part of the valve cavity with the lock and the eyebolt 9, and simultaneously lift the v...
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A cryogenic top-entry ball valve and an assembly method thereof. A cryogenic top-entry ball valve includes: a valve body, a spring seat, and a seat holder. The inner cavity of the valve is provided with a boss, and the head of the seat holder is provided with threads. The thread is provided with a nut, and the spring seat is provided with a card slot; the beneficial effect of the present invention is that the head of the valve seat holder is provided with a thread to cooperate with the nut, and the valve seat can generate a retreat space by means of the screwing of the nut, which prevents the traditional low-temperature In the top-entry ball valve, the pan-seal has an idle stroke during the opening and closing process of the valve, which improves the sealing reliability of the pan-seal; avoids the use of threaded holes for valve body installation to avoid leakage of the medium; with the aid of cylinder components and tooling components Realize the upper installation of the valve and realize the online maintenance function.
Description
[0001] The invention relates to a ball valve, in particular to a cryogenic top-loading ball valve. Background technique [0002] There are two types of typical cryogenic top entry ball valves in the market. One is to process four threaded holes symmetrically front and back on the valve body, and design the head of the valve seat into a special structure with a slope. The external adjustment rod is used to withstand the valve seat, and then the ball is installed, and then the adjustment is removed. Rod tooling, use four screw plugs to tighten the threaded holes, so as to realize the upper installation of the valve. Although this structure can meet the online maintenance function, it adds four leakage points, which is easy to cause medium leakage. At the same time, when designing the high-pressure valve, this structure is unreliable, and there is a potential safety hazard that the screw plug is blown out by the high-pressure medium. Another widely used cryogenic top-entry ball ...
Claims
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IPC IPC(8): F16K5/06B25B27/14
CPCF16K5/0636B25B27/14
Inventor师晓东张清双徐志新张静
OwnerJIANGSU SHENTONG VALVE