CN2116130U

CN2116130U - Cog-wheel gearing for butterfly valve

Info

Publication number: CN2116130U
Application number: CN 91226815
Authority: CN
Inventors: 章祖翼
Original assignee: HUANGYAN CITY SPECIAL VALVE FACTORY
Current assignee: HUANGYAN CITY SPECIAL VALVE FACTORY
Priority date: 1991-10-12
Filing date: 1991-10-12
Publication date: 1992-09-16

Abstract

Disclosed is a gear transmission mechanism for a butterfly valve, comprising a box body and a box cover. A valve rod whose lower part is connected with a valve plate is arranged in the box body. A sector gear which is arranged on the valve rod is matched with a driving gear, the driving gear is arranged in a shaft whose lower end is provided with a spring, and the upper end of the shaft is provided with a hand wheel. The shaft is connected with a transmission box through an upper cover where the turning stop mechanism of the shaft is arranged. The butterfly valve driven by the gear is in particular used for being matched with an underground pipeline. The utility model has the advantages of labor saving, high reliability, easy adjustment and convenient operation as a consequence of the upright hand wheel being used. Additionally, the utility model is provided with self-locking positioning mechanisms at a 0 DEG closing position and at 90 DEG opening position, and is provided with a spacing positioning position at the center.

Description

Cog-wheel gearing for butterfly valve

The utility model relates to the valve technology, is particularly suitable for supporting use in the under ground pipings such as water supply, blowdown, chemical industry, food, light industry, metallurgy.

Existing dish valve as Wafer Type Butterfly Valves with Rubber Itning and flange-type butterfly valve, by the lead agency difference, can be divided into electronic, pneumatic and mechanical transmission etc., and worm drive and manual is arranged in the mechanical transmission.The characteristics of worm drive are can self-locking on arbitrarily a bit, pull low weight during operation.But the major defect of worm drive is: because worm gear and worm screw diaxon are perpendicular, horizontal operation thisly horizontally operates in the under ground piping very painstakingly, very inconvenient, is " not making effectively ".

The purpose of this utility model is a design gear drive a kind of vertical operation, that be suitable for cooperating Wafer Type Butterfly Valves with Rubber Itning and flange-type butterfly valve.

The embodiment of the gear drive of the utility model dish valve is: have transmission case body and case lid, valve rod is arranged in the casing, connect valve plate under the valve rod, tooth sector is installed on the valve rod, and tooth sector cooperates with driving gear, and driving gear is installed on the axle, there is spring the lower end of axle, handwheel is installed in the upper end of axle, and axle connects transmission case by loam cake, and the turn stop of axle is arranged in the loam cake.

The gear drive of the utility model butterfly valve, the turn stop of its loam cake axis is: a kind of scheme constitutes the coupling that matches by the lower end of loam cake with the upper end of driving gear; Another kind of scheme is in the loam cake sidewall pin to be arranged, and chute is arranged on the axial wall, and chute matches with pin.

Gear-driven butterfly valve of the present utility model is compared with the butterfly valve of worm drive in the prior art, has the following advantages: the one, be specially adapted in the under ground piping, and adopt vertical handwheel, easy to operate, laborsaving; The 2nd, press down handwheel during operation and close clockwise, to open counterclockwise, can there be the positioned at intervals of 15 ° of scopes the centre, and closing with 90 ° of open places from 0 ° all has self-locking positioning mechanism; The 3rd, big small gear is with 1:4,2:8, and 4:16 ... ratio design, it is little to open moment.

Fig. 1 is the gear drive schematic representation of the utility model dish valve;

Fig. 2 is the gear drive plan view of the utility model dish valve;

Fig. 3 is that the utility model loam cake sidewall pin cooperates schematic representation with the axial wall upper hopper chute.

Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing 1-Fig. 3.

1, casing 2, case lid 3, valve rod 4, lining 5, angle lid 6, seal ring 7, valve plate 8, seal ring 9, tooth sector 10, handwheel 11, loam cake 12, nut 13, top cover 14, axle 15, loam cake lower end 16, driving gear upper end 17, seal ring 18, lining 19, screw 20, elastic cylindrical pin 21, key 22, driving gear 23, spring 24, spring seat 25, steel ball 26, socket head screw 27, positioning screwn 28, pin 29, chute 30, joint.

The utility model is gear-driven butterfly valve, have gear transmission casing (1) and case lid (2), valve rod (3) is installed in casing, connect valve plate (7) under the valve rod, tooth sector (9) is installed on its valve rod, and tooth sector is driven by driving gear (22), and driving gear is installed on the axle (14), handwheel (10) is installed in the gear shaft upper end, the lower end mounting spring (23) of axle.When operation, press handwheel (10) down earlier, spring (23) is compressed, driving gear upper end (16) and loam cake lower end (15) are disengaged, rotating handwheel (10) again (can be designed to close clockwise, open counterclockwise), handwheel drives driving gear (22) by axle (14), driving gear drives tooth sector (9), tooth sector drives valve rod (3), valve rod drives valve plate and rotates, tooth sector all has self-locking positioning mechanism in terminal, positioning screwn (27), and can there be positioned at intervals the centre.Because coupling is formed with loam cake lower end (15) in driving gear upper end (16), after decontroling handwheel, under the effect of spring (23), (15,16) both combinations, because loam cake (11) fixes with casing (1) and case lid (2), so axle (14) and gear can not rotate, another program that axle bumper is changeed is: in loam cake (11) sidewall pin (28) is installed, chute (29) is arranged on axial wall, after handwheel was pressed down, pin (28) was when joint (30) position, and axle (14) and gear can rotate; After decontroling handwheel, under the effect of spring, pin (28) is in chute (29) position, and axle is box-uped and can not be rotated.Above-mentioned so-called tooth sector is cylindrical sector gear or planet tooth sector, drives valve rod by cylindrical sector gear or planet tooth sector again.

Claims

1, a kind of gear drive of butterfly valve, have transmission case body 1 and case lid 2, valve rod 3 is arranged in the casing, connect valve plate 7 under the valve rod, it is characterized in that installing on the valve rod 3 tooth sector 9, tooth sector cooperates with driving gear 22, driving gear is installed on the axle 14, and there is spring 23 lower end of axle, and handwheel 10 is installed in the upper end of axle, axle connects transmission case by loam cake 11, and the turn stop of axle is arranged in the loam cake 11.

2, the gear drive of dish valve as claimed in claim 1 is characterized in that the turn stop of loam cake 11 axis 14 is: the coupling that matches is formed with the upper end of driving gear 22 16 in the lower end 15 of loam cake.

3, the gear drive of dish valve as claimed in claim 1, it is characterized in that the turn stop of loam cake 11 axis 14 is: in loam cake 11 sidewalls pin 28 is arranged, chute 29 is arranged on the axial wall, chute matches with pin.

4, the gear drive of dish valve as claimed in claim 1 is characterized in that the tooth sector that driving gear drives is cylindrical sector gear or planet tooth sector, drives valve rod by cylindrical sector gear or planet tooth sector again.