CN1071742A

CN1071742A - Butterfly ball valve

Info

Publication number: CN1071742A
Application number: CN 91107508
Authority: CN
Inventors: 徐世昌
Original assignee: SHANGHAI JINGGONG VALVE FACTORY
Current assignee: SHANGHAI JINGGONG VALVE FACTORY
Priority date: 1991-10-19
Filing date: 1991-10-19
Publication date: 1993-05-05

Abstract

The present invention is an ordinary ball valve for its profile of butterfly ball valve, and inside then is to be combined by ordinary ball valve and common butterfly valve.The invention solves ball valve and can not be used for throttling (and many producers wilfully be used for throttling), the butterfly valve seal circle is subject to the problem of erosion.The present invention is exactly the high leak tightness with ball valve, combines with the sensitivity of butterfly valve control flow rate.Have good airproof performance, seal ring is not subject to erosion, and the control media flow is sensitive and accurate, advantages such as long working life.The present invention can be widely used in the various pipelines in the industrial system, can prevent the run, drip, leak phenomenon effectively, and provides a kind of novel valve for energy saving.

Description

Butterfly ball valve

The present invention is a kind of novel valve in the universal machine industry.Its profile is an ordinary ball valve, and inside then is to be combined by ordinary ball valve and common butterfly valve.

Ordinary ball valve is a kind of keying shape valve, promptly or standard-sized sheet, or full cut-off, generally can not be used as throttling (adjusting flow).But the producers of many usefulness ball valves usually are used as throttling with ball valve, and the seal ring that causes ball valve is by the serious erosion of pipeline medium, and the time is not grown and just the seepage phenomenon can occur.

Common butterfly valve both can standard-sized sheet, full cut-off, also can be between opening 15～70 ° control flow rate delicately.But when closing, its sealing is not as ball valve, and when if closing velocity is too fast, can produce too high water hammer, and simultaneously, seal ring also is subjected to the pipeline medium erosion easily, and produces the seepage phenomenon.

And butterfly ball valve is exactly the high leak tightness with ball valve, combines with the sensitivity of butterfly valve control flow rate.Compare with ordinary ball valve, its seal ring is difficult for frayed and erosion; Can be widely used in the occasion that needs throttling, and can be sensitive and control flow rate exactly; Also applicable to the various fluids of being with solid particle.Compare with common butterfly valve, sealing can reach airtight level at an easy rate when it was closed; Seal ring is difficult for frayed and erosion; Simultaneously, owing to be that spheroid is closed when closing, so can not produce high water hammer.

For making the present invention can be common to other valves, so profile and structure length are all identical with ordinary ball valve.Within it on the cage structure, increased butterfly lobe 1 and auxiliary valve rod 2(sees Fig. 1 than ordinary ball valve), and the straight groove at spheroid top changed mill into fan groove.

The kind of drive is: drive main valve stem 1 by transmission device, main valve stem drives auxiliary valve rod 2, and auxiliary valve rod drives butterfly lobe 3 again, and spheroid 4 is directly to be driven by main valve stem.Fig. 2 is the cut-away view of valve bandle set: drive two worm gears by a worm screw 5, two worm gears respectively are being with a tooth sector again respectively, drive valve rod gear 10 jointly by these two tooth sector.Wherein, worm gear 6 also then sign board 11(see Fig. 3) on pointer 12.Cooperate with the ingenious of valve rod by this transmission device, make this valve finish full cut-off, standard-sized sheet and throttling.

Fig. 4-a is the initial position of valve, i.e. full close position.At this moment, the pointed on the sign board " full cut-off ".Subsequently, drive two worm gears by worm screw and make move toward one another, from 0 °～90 ° be idle stroke, promptly main valve stem 1 does not drive spheroid 4, spheroid is still in the closed position.In the time of 90 °, the pointed on the sign board " beginning ".Since 90 °, main valve stem 1 contacts with the spheroid fan groove, drives spheroid 4 rotations.At 0 °～180 °, the tooth sector 8 on the transmission device is driving valve rod gear 10, and when reaching 180 °, valve is in fully open position and (sees Fig. 4-b), the pointed on the sign board " standard-sized sheet ".Simultaneously, tooth sector 8 is thrown off with valve rod gear 10, and tooth sector 9 connects with valve rod gear 10, drives valve rod gear 10 by tooth sector 9 and makes reverse motions.At this moment, main valve stem 1 does not contact with spheroid 4, but is being with auxiliary valve rod 2 to control butterfly lobe 3, carries out throttling (being the control media flow) and (sees Fig. 4-c), up to medium (is not seen Fig. 4-d) by (but not being closing function).At this moment, the pointed on the sign board " 0 ", and worm gear 6(or worm gear 7) turned over 270 °.

After this, if worm screw 5 reverse operatings, then Yi Shang each component movement direction also thereupon with original moving direction in opposite directions.When the pointer on the sign board was got back to " closing " position, this moment, valve was also just closed.

The present invention can be used for the occasion of any use ball valve and butterfly valve.It makes ball valve have throttling function, will bring very big benefit to energy saving; Because avoided the erosion of seal ring, so that the operating life of ball valve when throttling improve greatly.Simultaneously, on the basis that does not lose the butterfly valve function, sealability of the present invention is strengthened greatly, can control run, drip, leak phenomenon in the industrial system effectively well.Therefore, purposes of the present invention is very widely.

In the general industry pipeline,, when not needing full dose to carry (being that valve is not in full-gear) medium, just can effectively be regulated if replace original ball valve with the present invention.Like this, not only saved the energy, the operating life of ball valve is improved greatly, factory can incur loss through delay production for often changing seal ring (sometimes even change valve itself).If replace original butterfly valve, when needs are closed, just can more effectively close the circulation of medium with the present invention; The life-span that has also prolonged simultaneously seal ring is (because the seal ring of general butterfly valve protrudes in pipeline, be easy to be subjected to the wearing and tearing of medium erosion and butterfly lobe itself), factory can often change seal ring (even changing valve) for medium seepage and seal ring damage, and has guaranteed the trouble-free operation of factory's pipeline.

Claims

1, the present invention is a kind of novel valve that ball valve and butterfly valve are combined, and utilizes spheroid to realize standard-sized sheet, full cut-off; Utilize the butterfly lobe to realize throttling.It is characterized in that: the butterfly lobe is installed in spheroid inside, forms the integral body of a control media.

2, novel valve according to claim 1 is characterized in that only relying on a main valve stem to realize the operation of spheroid and butterfly lobe.