CN2674234Y

CN2674234Y - Electric actuating device for valve

Info

Publication number: CN2674234Y
Application number: CN 200420024427
Authority: CN
Inventors: 项美根
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-01-19
Filing date: 2004-01-19
Publication date: 2005-01-26
Anticipated expiration: 2014-01-19

Abstract

The utility model discloses an electric actuating device for valves, comprising a motor sleeve 1, an electric actuating worm 2, and an electric actuating worm wheel 3. An eccentric shaft 11 is sheathed on the radial ball bearing and eccentric shaft sleeve 13 of a main shaft 12, the eccentric shaft 11 is fixed to the eccentric shaft sleeve 13 through a set screw, the electric actuating worm wheel 3 is sheathed on the eccentric shaft 11 through a flat key 15, a planet gear 4 is sheathed on the radial ball bearing 16 of the eccentric shaft, a static gear whose positioning excircle is provided with worm-gear teeth 17 is arranged on a coupling 18 and engaged with the planet gear 4, and the planet gear 4 is connected with a drive plate 20 connected with an output shaft 7 through a crossed slide block 19. The motor sleeve of one-stage speed reduction is connected with the electric actuating worm and worm wheel sleeve of two-stage speed reduction, and the three-stage speed reduction adopts a planet speed reduction mechanism with few teeth difference. The electric actuating device for valves has the advantages of compact structure, small volume, and light weight. The manual and electric actuating operation is respectively independent. The manual and electric actuating switch is cancelled. The electric actuating device for valves can conveniently change transmission ratio to obtain various output rotational speed. The butterfly valves, ball-valves, and plug valves with various specifications can be adopted as required to achieve the fast opening and closing of the valve.

Description

A kind of electric device for valve

Technical field

The utility model relates to a kind of electric device for valve, specifically relates to a kind of part rotary type electric device for valve.

Background technique

At present, part rotary type electric device for valve is widely used in industrial departments such as oil, chemical industry, water power, metallurgy, shipbuilding, light industry, food, is applicable to that butterfly valve, ball valve, stopcock etc. make the rotating valve of part.Product great majority on the market are to be combined by many turning valves Electric actuator stack planetary gear speed reducing mechanism or worm gear reducer mechanism.This rotary type electric device for valve complex structure, volume are big, cost is high.Because self structure is limit, well the valve of adaptive all size.Supporting especially for middle-size and small-size valve, low load with strong power, the shortcoming that nose heave body is light is very outstanding, and manual and electronic switching has and overlap independently mechanism, and manual, electronic working state is switched by clutch, not only complex structure, and rate of fault height.Especially in the place of control hazardous fluids medium,, may cause serious accident if when having a power failure, switch malfunctioning, keying inefficacy.

The model utility content

Technical problem to be solved in the utility model provides a kind of compact structure, opens and closes electric device for valve fast, simplifies the internal structure of an organization, improves the purpose of reliability to reach.

For solving the problems of the technologies described above a kind of electric device for valve of the utility model, comprise motor section cover, electronic worm gear, electronic worm screw, it is characterized in that: excentric sleeve is contained on the radial ball bearing and excentric sleeve on the main shaft, eccentric shaft fixes by tightening screw and excentric sleeve, electronic worm gear is sleeved on the eccentric shaft by flat key, planetary pinion is sleeved on the eccentric shaft radial ball bearing, and the quiet gear that is provided with worm-gear tooth on the cylindrical of location places to connect on the dish and meshes with planetary pinion; Planetary pinion and and the joining dial of output shaft between link by the crosshead shoe that is provided with.Dial connects output shaft and drives valve.In this structure, cancelled the moving switching of torch, and can change velocity ratio easily, to obtain multiple output speed.

A kind of electric device for valve is characterized in that: the worm-gear tooth that described quiet top circle is provided with connects on the dish by meshing with manual worm, quiet gear being positioned at.Manual worm Luo revolves the line lift angle less than 6 degree, and worm screw, worm drive have self-locking performance.

A kind of electric device for valve is characterized in that: described output shaft is provided with aperture indication and cam mechanism.

Owing to adopt technique scheme, compare with prior art, electric device for valve slows down for three grades and adopts the fewer differential teeth planetary decelerator structure, and this transpose configuration compactness has reduced volume and weight, manually, electronic independent separately, cancelled the moving switching of torch, and can change velocity ratio easily, to obtain multiple output speed, butterfly valve that as required can adaptive all size, ball valve, stopcock etc. are made rotating valve of part and similar devices, also can realize the fast opening and closing of valve.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is the utility model mechanical drive principle schematic representation;

Fig. 2 is that the A of Fig. 1 is to schematic representation;

Fig. 3 is the utility model fewer differential teeth planetary decelerator structure structural profile schematic representation;

In Fig. 1, Fig. 2, Fig. 3,

1, motor section cover; 2, electronic worm screw; 3, electronic worm gear; 4, planetary pinion; 5, quiet gear; 6, manual worm; 7, output shaft; 8, cam mechanism; 9, annular rack; 10 torque controling mechanisms; 11, eccentric shaft; 12, main shaft; 13, excentric sleeve; 14, Cock screw; 15, flat key; 16, radial ball bearing; 17, worm-gear tooth; 18, connect dish; 19 crosshead shoes; 20, dial.

Embodiment

As Fig. 1, Fig. 2, shown in Figure 3, a kind of electric device for valve, comprise motor section cover 1, electronic worm screw 2, electronic worm gear 3, eccentric shaft 11 is sleeved on the radial ball bearing and excentric sleeve 13 on the main shaft 12, eccentric shaft 11 fixes by tightening screw 14 and excentric sleeve 13, electronic worm gear 3 is sleeved on the eccentric shaft 11 by flat key 15, and planetary pinion 4 is sleeved on the eccentric shaft radial ball bearing 16, the quiet gear 5 that is provided with worm-gear tooth 17 in the location on the cylindrical place connect on the dish 18 with planetary pinion 4 engagements; Planetary pinion 4 and and output shaft 7 joining dials 20 between link by the crosshead shoe 19 that is provided with.One-level reducing motor portion cover connects the electronic worm screw of double reduction, worm gear portion cover.Three grades of employing fewer differential teeth planetary decelerator structures that slow down, its drive path is electronic worm gear 3, and------planetary pinion 4---crosshead shoe 19---dial 20 connects output shaft 7 and comes opening/shutting valve capacity eccentric bearing 11.Its working procedure is to start reducing motor by external signal, and electronic worm gear 3 drives eccentric shaft 11 and rotates, and forces planetary pinion 4 to make the planet revolution motion around fixed quiet gear 5.The worm-gear tooth 17 that quiet gear 5 cylindricals are provided with is by meshing with manual worm 6.Because of manual worm Luo revolves the line lift angle less than 6 degree, Worm and Worm Gear Driving has self-locking performance.When planetary pinion 4 rotated, quiet gear 5 can not rotate because of the locking of manual worm 6.Because quiet gear 5 is poor with the number of teeth that planetary pinion 4 exists seldom, thereby make planetary pinion 4 produce reverse low speed spinning motion again, by crosshead shoe 19 spinning motion is passed to output shaft 7 again, reach the deceleration purpose around self axis; Its speed ratio: when planetary pinion Z1 and fixed quiet gear Z2 engagement during one week, (Z2-Z1), negative sign is represented switched in opposite to its speed ratio: IH=-Z1/, according to different velocity ratios, number of teeth difference can be a tooth, bidentate, three teeth or four teeth, five teeth, (Z is the number of gears).

The worm-gear tooth 17 that quiet gear 5 cylindricals are provided with connects on the dish 18 by meshing with manual worm 6, quiet gear 5 being positioned at.Drive quiet gear 5 and make planetary pinion 4 drive output shafts 7 when manual worm 6 rotates and make valve opening and closing, this man-operated mechanism does not need to switch, not only simply but also reliable.

Output shaft 7 is provided with aperture indication and cam mechanism 8.The aperture indication is synchronous with output shaft 7, and Stroke Control signals to the electric control part cover by cam mechanism 8, and aperture indicates existing dial to show, has the aperture table to show again.Torque controling mechanism 10 plays the effect of protection valve, is that the cam on 9 driving torque gear shafts of the annular rack on it signals to the electric control part cover, makes the motor stall by the axial play in electronic worm screw 2 stressed backs.

This electric device for valve mechanism compactness, part is few, and the general planetary gear speed reducing mechanism of envelope-bulk to weight ratio descends more than 60%, the also corresponding reduction about 40% of cost.

Claims

1, a kind of electric device for valve, comprise motor section cover (1), electronic worm screw (2), electronic worm gear (3), it is characterized in that: eccentric shaft (11) is sleeved on the radial ball bearing and excentric sleeve (13) on the main shaft (12), eccentric shaft (11) fixes by tightening screw (14) and excentric sleeve (13), electronic worm gear (3) is contained on the eccentric shaft (11) by flat key (15), planetary pinion (4) is sleeved on the eccentric shaft radial ball bearing (16), and the quiet gear (5) that is provided with worm-gear tooth (17) on the cylindrical of location places and connects last and planetary pinion (4) engagement of dish (18); Planetary pinion (4) and and the joining dial of output shaft (7) (20) between link by the crosshead shoe (19) that is provided with.

2, a kind of electric device for valve according to claim 1 is characterized in that: the worm-gear tooth (17) that described quiet gear (5) cylindrical is provided with connects on the dish (18) by meshing with manual worm (6), quiet gear (5) being positioned at.

3, a kind of electric device for valve according to claim 1 is characterized in that: described output shaft (7) is provided with aperture indication and cam mechanism (8).