Regulating valve rod connecting device of thermal power steam turbine
A coupling device and regulating valve technology, which is applied in the direction of mechanical equipment, engine components, machines/engines, etc., can solve problems such as difficult to overcome valve stem rotation, complicated parts processing, and on-site installation difficulties, so as to reduce maintenance workload and cost , Beautiful appearance, reduce workload effect
Active Publication Date: 2010-05-19
SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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Problems solved by technology
[0003] Most of the existing regulating valve stems are connected with the oil motor by long threads, which not only complicates the processing of parts, but also requires high machining accuracy, making it difficult to install on site and overcome the rotation of the valve stem, which brings a lot of inconvenience to users and manufacturers
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Embodiment Construction
[0024] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0025] Such as figure 1 As shown, the thermal power steam turbine regulating valve stem coupling device of the present invention is used to connect the regulating valve valve stem 1 and the piston rod 9 of the oil motor. The coupling device includes a valve stem nut 6, a piston rod flange 8, a cover plate 5. The control board 3 and the adjusting gasket 10, the valve stem nut 6 is threadedly connected with the valve stem 9 of the regulating valve, and the cover plate 5 and the control plate 3 are sequentially arranged between the valve stem nut 6 and the valve stem 1 of the regulating valve The piston rod flange 8 is threadedly connected with the oil motor piston rod 9, and the control board 3 is fixedly connected with the piston rod flange 8 through bolts; the adjusting gasket is fixedly arranged between the oil motor piston rod and the regul...
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The invention discloses a regulating valve rod connecting device of a thermal power steam turbine, which is used for mutually connecting a regulating valve rod and a servomotor piston rod and comprises a valve rod nut, a piston rod flange, a cover plate, a control plate and a regulating gasket, wherein the valve rod nut and the regulating valve rod are in threaded connection, and the cover plate and the control plate are sequentially arranged between the valve rod nut and the regulating valve rod; the piston rod flange and the servomotor piston rod are in threaded connection, and the cover plate and the piston rod flange are fixedly connected; and the regulating gasket is fixedly arranged between the servomotor piston rod and the regulating valve rod. The moving components of the invention are together connected as a whole, thereby preventing possible connection failure, effectively preventing the relative rotation among the moving components and between the moving components and static components and lowering maintenance workload and cost; and the regulating valve rod connecting device of the thermal power steam turbine is conveniently used for renovation projects, and has the advantages of attractive appearance, novel structure, simple processing, low manufacturing cost and the like.
Description
technical field [0001] The invention belongs to the technical field of thermal power steam turbines, in particular to a valve stem coupling device for a thermal power steam turbine regulating valve. Background technique [0002] In the thermal power steam turbine control valve, the valve stem is connected with the piston rod of the oil motor, so that the power of the oil motor is transmitted to the valve disc through the valve stem to adjust the opening of the control valve, and then adjust the load of the steam turbine. It can be seen that due to the change of load, the opening of the regulating valve is constantly changing in actual operation, and it is often in a partial opening state, and the steam flowing through it will produce a certain degree of throttling effect. The valve stem of the regulating valve is subjected to alternating steam force, which may cause the valve stem to rotate, and this phenomenon is often found in practice. [0003] Most of the existing contr...
Claims
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Inventor 黄庆华杨延平贺小忠
Owner SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD