CN2050119U - Part rotary valve driving device - Google Patents

Abstract

The utility model relates to a part rotary valve driving device which belongs to the technical field of automatic control of valves. The existing part rotary valve driving devices have the defects of large volume, complex mechanism and high manufacturing cost. Because the utility model adopts a secondary worm gearing, the volume of the whole driving device is reduced by 50%, the weight is lightened by 70%, motor power is reduced by 50%, the noise is lowered by 20 decibels, and thereby, the reasonable cooperation with a miniature rotary valve is achieved. In addition, the utility model adopts a new manual and electric switching mechanism; hence, the switch between manual operation and electric operation can be realized without interlocking electric apparatus. The utility model can be widely used for industrial departments such as power generation, shipbuilding, coal, tap water, etc.

Description

Part rotary valve driving device

The utility model belongs to the automatic control technology field of turning valve, is mainly used in generating, shipbuilding, coal, industrial department and R﹠D institutions such as tap water.

In recent years, because the more and more generally employing in the national economy every profession and trade of various electric valves.Valve actuator had reduced labor intensity merely from the past and has developed into the management that adapts to modernization and computer as the application of the electric actuator of valve.But, the control of valvelet does not also have a kind of comparatively desirable small drive device supporting with it, cause many needs automatically the small-sized butterfly valve of control etc. have to adopt bigger drive unit, the general structure that adopts of this class device is: 1, by the additional two stage reduction gear of many turning valves drive unit; 2, spur wheel worm transmission structure; 3, spur wheel worm screw and planetary gear mechanism; 4, spur wheel worm screw and cycloidal-pin wheel driving mechanism; 5, full spur gear transmission mechanism etc.These devices all exist volume big, shortcomings such as mechanism's complexity and manufacture cost height.

The purpose of this utility model is to design a kind of compact structure, the drive unit that volume is little.

Particular content of the present utility model is:

The utility model is mainly by miniature threephase asynchronous or torque motor, the second-stage worm reducing gear, and the positioning control part is made up of four parts such as the moving switching mechanisms of torch.Its working principle is: motor directly connects first order worm shaft, and first order worm screw drives worm gear on the worm shaft of the second level, drives worm gear by second level worm screw again, makes output shaft drive valve rod and rotates.The position is housed on the top of output shaft adjusts cam, limit position that can the control valve switch.Hand, electronic switching mechanism are driven by handwheel and realize by the pull bar and the electronic on-of pin at worm shaft center, the second level.

Accompanying drawing is the structural representation of driving mechanism of the present utility model and the moving switching mechanism of torch.Part 1 is a bearing among the figure, and part 2 is first-stage worm gear, and part 3 is one-level worm screws, and part 4 is casings, and part 5 is bearings, and part 6 is handwheels, and part 7 is pull bars, and part 8 is second-stage worm gear, and part 9 is second-stage worm in addition, and part 10 is electronic on-of pins in addition.

Motor directly connects first order worm screw 3 among the figure, first order worm screw 3 drives first order worm gear 2, first order worm gear 2 is coaxial with second level worm screw 9, thereby driving second level worm gear 8 by second level worm screw 9 moves in turn, second level worm gear 8 is enclosed within on the output shaft, output shaft is again that valve rod directly connects, and therefore drives valve rod and rotates.

Hand among the figure, electronic switching mechanism are by handwheel 6, composition such as the pull bar 7 by second level worm shaft 9 centers and electronic on-of pin 10.Electronic on-of pin is processed two pawls at pull bar right overhead on worm gear 2.When handwheel 6 advanced, on-of pin 10 was with after engagement pawl on the worm gear 2 combines, practicable electric operating.At this moment engagement pawl is thrown off on engagement pawl on the handwheel 6 and the second level worm shaft.When the needs manually-operable, handwheel 6 is pulled outwardly, combine at this moment with engagement pawl on the second level worm shaft 9, electronic on-of pin 10 is thrown off promptly practicable manually-operable with the engagement pawl on the worm gear 2.

Characteristics of the present utility model:

1, owing to adopted the second-stage worm gear worm gearing, so that whole drive unit is compared with existing apparatus, volume dwindles 50% approximately, and weight alleviates 70% approximately, and power of motor reduces 50%, and noise reduces by 20 decibels in accordance with regulations;

2, new hand, electric switch-over mechanism need not the electrical equipment interlocking, and be easy to operate, compact conformation, safe and reliable.

Claims (1)

1. A kind of part turning valve drive unit, it is by miniature threephase asynchronous or torque motor, the master worm Worm wheel transmission mechanism, the positioning control part, the moving switching mechanism of torch is formed, and it is characterized in that driving mechanism is a second-stage worm, and hand, electronic switching mechanism are by handwheel, by the pull bar and the pull bar electronic on-of pin right overhead at worm shaft center, the second level, the engagement pawl on the first order worm gear is formed.