CN2821331Y

CN2821331Y - Valve electric device

Info

Publication number: CN2821331Y
Application number: CN 200520062657
Authority: CN
Inventors: 肖越超
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-08-05
Filing date: 2005-08-05
Publication date: 2006-09-27
Anticipated expiration: 2015-08-05

Abstract

The utility model relates to an electric device of a valve, which comprises a primary power device, a worm and a driving member, wherein the driving member is provided with a worm wheel part which is matched with the worm, an output shaft part which is connected with the worm wheel part and a shaft coupling part which is positioned on one end of the output shaft part and is used for being connected with a valve rod of the valve. The driving member of the utility model combines the functions of a worm wheel, an output shaft and a shaft coupling in the prior art into integration; the weight, the cost and the volume of the whole valve can be reduced; simultaneously, zero error transmission of a plurality of sections can be realized and the control precision is high.

Description

Electric device for valve

[technical field]

The utility model relates to a kind of electric device for valve, relates in particular to the Electric actuator on a kind of pipeline valve.

[background technique]

As shown in Figure 1, existing smart small-sized electric valve, as butterfly valve, ball valve etc., comprise Electric actuator 1 and valve 2, the last part of the Transmitted chains in this Electric actuator 1 is made up of worm gear 12, output shaft 14 and coupling 16, and this coupling 16 is used to connect the output shaft 14 of Electric actuator 1 and the valve rod 22 of valve 2.When Electric actuator 1 is assembled with valve 2, need to use support 3 to connect the pedestal of Electric actuators 1 and the flange of valve 2.By the variation of support 3 mounting hole site, Electric actuator 1 can be installed with the valve of various installation dimensions.

Yet, weight and cost that support 3 that is provided with between above-mentioned Electric actuator 1 and the valve 2 and coupling 16 have not only increased electric valve, but also increased the volume of electric valve and shared space; In addition, cooperate by key pin between worm gear 12 and the output shaft 14, its joint gap can lower the control accuracy of electric valve, and the joint gap between output shaft 14 and the coupling 16 also can lower the control accuracy of electric valve.

[model utility content]

Technical problem to be solved in the utility model is to provide a kind of electric device for valve, and it is in light weight, cost is low, shared space is little, and the control accuracy height.

For solving the problems of the technologies described above, the technological scheme that the utility model adopted is: a kind of electric device for valve is provided, it comprises elementary power plant, worm screw and driving component, the worm gear portion that this driving component has and worm screw cooperates, the output axial region that links to each other with worm gear portion, and be positioned at and export axial region one end and be used for the shaft coupling portion that is connected with the valve rod of valve.

The beneficial effects of the utility model are: because driving component of the present utility model is the equal of the multifunctional part of worm gear in the prior art, output shaft and coupling three unification, it possesses above-mentioned three's function simultaneously, therefore, can avoid support and coupling are set between drive unit and valve again, thereby reduce weight, cost and the volume of whole valve; Simultaneously, driving component has been avoided the joint gap between the worm gear and output shaft in the prior art, and the gap between output shaft and the coupling, has realized the zero error transmission of part link, therefore, and its control accuracy height.

[description of drawings]

The utility model is described in further detail below in conjunction with drawings and embodiments:

Fig. 1 is the partial schematic sectional view of electric valve in the prior art.

Fig. 2 is the partial schematic sectional view of the utility model one preferred embodiment.

[embodiment]

See also Fig. 2, a preferred embodiment of the present utility model comprises elementary power plant (not shown), worm screw 10 and driving component 20.This driving component 20 is one-body molded, the output axial region 204 that it has worm gear portion 202, links to each other with worm gear portion, and the shaft coupling portion 206 that is positioned at output axial region 204 1 ends.The periphery of this worm gear portion 202 is provided with some gear teeth that cooperate with worm screw 10.The lower end of this shaft coupling portion 206 caves inward and forms the endoporus 208 of different shape, and the shape of these endoporus 208 is consistent with the shape of the valve rod 302 of various standard valve 30, plugs for the valve rod 302 of valve 30.

Above-mentioned Electric actuator is positioned at the casing 40 of drive unit, be provided with various flanges in the lower end surface of casing 40 the screw (not shown) is installed, during mounted valve 30, as long as its valve rod 302 is inserted in the endoporus 208 of driving component 20, pass the mounting flange hole of valve 30 then with bolt 50, the corresponding screw and the locking that are screwed into casing 40 get final product.

The transmission of power of the utility model electric device for valve is: to worm screw 10, through the worm gear portion 202 of worm screw 10 to driving component 20, the endoporus 208 by driving component 20 passes on the valve rod 302 of valve 30 at last again by elementary power plant.

Because driving component 20 of the present utility model is the equal of the multifunctional part of worm gear in the prior art, output shaft and coupling three unification, it possesses above-mentioned three's function simultaneously, therefore, can avoid support and coupling are set between drive unit and valve again, thereby reduce weight, cost and the volume of whole valve.Simultaneously, driving component 20 of the present utility model has been avoided the gap between worm gear and the output shaft, and the gap between output shaft and the coupling, realizes the zero error transmission of part link, this reduces return difference for valve actuator, improves precision and plays crucial effect.

Claims

1, a kind of electric device for valve, comprise elementary power plant and worm screw, it is characterized in that: this Electric actuator also comprises a driving component, the worm gear portion that this driving component has and worm screw cooperates, the output axial region that links to each other with worm gear portion, and be positioned at and export axial region one end and be used for the shaft coupling portion that is connected with the valve rod of valve.

2, electric device for valve as claimed in claim 1 is characterized in that: the periphery of the worm gear portion of described driving component is provided with some gear teeth that cooperate with worm screw.

3, electric device for valve as claimed in claim 1 is characterized in that: the shaft coupling portion of described driving component has the endoporus that the valve rod for valve plugs.

4, as claim 1,2 or 3 described electric device for valve, it is characterized in that: described driving component is one-body molded.

5, electric device for valve as claimed in claim 1 is characterized in that: described Electric actuator is positioned at the casing of drive unit, and valve is connected by bolt locking with the end face of drive unit casing.