CN2871991Y - Diaphragm-balanced floating-ball valve - Google Patents

Abstract

The utility model provides a diaphragm balanced ball float valve, comprising a triple valve body, a valve cap, a valve core, a lever and a float ball. The valve core comprises two disc shaped ends, of which the upper is arranged in a guiding hole in the valve cap by a pin boss, which presses an upper pressure plate and a rubber diaphragm against the upper disc shaped body by threads at the upper end the valve core and of which the upper end is connected by a pin with the lever connected with a floating ball by a screw rod; while the other end is arranged in the guiding hole, and the disc shaped body at the lower end of the valve core is fixed with a lower pressure plate by nuts and a rubber seal gasket is arranged between the lower end of the valve core and the lower pressure plate. The model has the advantages that as the employed rubber diaphragm fixed between the valve core and the pressure plate is a balanced part and is elastic, the diaphragm moves up and down agilely and free from friction, and the diaphragm overcomes the shortages of great friction resistance and easy wear of a leather cup; the model employs overhead single lever structure other than double-lever structure, and is free from resistance in operation, thus the model overcomes the shortages of the double-lever structure that the double levers are easy to jam and the valve is closed as a lower lever is affected by water.

Description

Barrier film balanced type float valve

Technical field

The utility model relates to a kind of valve with the automatic open and close of floater controlled valve door.

Background technique

With the valve of floater controlled valve door recloser, multiple structure is arranged, the earliest be the plain edition float valve, its advantage is that simple in structure, valve opening can change with liquid surface lifting; Shortcoming is, the ball float volume is too big, and valve rod is oversize, is not easy to install and maintenance, and in addition, spool is closed in the face of the water inlet direction, need overcome solid flooding pressure when closing; A kind of double lever balanced type of up-to-date appearance float valve, make the intake pressure stepless action in the spool two ends, thereby reduce the valve closing resistance, the ordinary ball valve performance is improved, but, also have several shortcomings, adopt rubber cup as air locking, because of rubber cup and valve body surface friction factor very big, so there is big moving resistance, and, the easy abrasion of rubber cup, thus cause poor sealing and leak; In addition, adopt double lever, it is many that rod member connects the joint, easily blocks, and following lever bears out water slug, when the pressure height, and when flow is big, the valve closing difficulty.

Summary of the invention

For solving the problem that aforementioned balanced type float valve exists, the utility model provides a kind of barrier film balanced type float valve, and this ball valve comprises three-way type valve body, valve gap, spool, lever and ball float;

The spool two ends are disking body, the spool upper end is loaded in the pilot hole of valve gap by key seat, key seat is pressed in the upper end disking body by spool upper end screw thread with top board and rubber film, the key seat upper end is connected with lever by bearing pin, lever connects a ball float through a screw rod, the spool lower end is loaded on down in the pilot hole of office, and the disking body of lower end is fixed by nut and press table, between the disking body of spool lower end and the press table rubber gasket is arranged.

The utility model has the advantages that: 1, the rubber film that is fixed between spool and pressing plate because of employing is the sealing and balancing device, because of the elasticity of film itself, upper and lower mobile flexibly, nothing moves friction, replaces leather cup, overcomes the shortcoming that big, the easy abrasion of leather cup surface friction drag was lost efficacy; 2, adopt overhead type simple lever structure, non-resistance in service replaces the double lever structure, overcomes the shortcoming that double lever easily blocks, lever is subjected to water outlet shock effect valve closing down.

Description of drawings

Accompanying drawing is a structural drawing of the present utility model.

Label declaration in the accompanying drawing:

Valve body 1, bolt 2, rubber film 3, bearing pin 4, cotter pin 5, key seat 6, bearing pin 7, cotter pin 8, top board 9, valve gap 10, lever 11, locking nut 12, screw rod 13, spool 14, rubber gasket 15, O-ring seals 16, press table 17, nut 18, following office 19, ball float 20.

Embodiment

See also shown in the accompanying drawing, three way valve 1, the upper end connects valve gap 10 with bolt 2, the lower end is with the office 19 that is threaded down, spool 14 is arranged in the valve body 1, spool 14 two ends are disking body, be lined with rubber film 3 between upper end disking body and the top board 9, be pressed between valve gap 10 and the valve body 1 around rubber film 3 outer rims, key seat 6 is pressed in top board 9 and rubber film 3 on the spool 14 upper end disking bodies by spool 14 upper end screw threads, and key seat 6 upper ends are by bearing pin 7 and lever 11, screw rod 13 and valve ball 20 connect, wherein bearing pin 7 ends are equipped with cotter pin 8, prevent from that lever 11 left ends are connected with valve gap 10 with bearing pin 4, wherein bearing pin 4 ends are equipped with cotter pin 5 in case deviate from; Lever 11 can rotate around bearing pin 4, valve body 1 lower end disking body is fixed with rubber gasket 15 by nut 18, press table 17, spool 14 lower ends are loaded on down in the pilot hole of office 19, and the upper end is loaded in valve gap 10 pilot holes by key seat 6, so spool 14 can be upper and lower free movable; O shape rubber seal 16 is equipped with in case leak with valve body 1 connecting thread place in following office 19.

Running is: after press water enters valve body 1 from valve body 1 left end water intake, respectively hydraulic pressure is passed to the rubber film 3 of valve body 1 upper end and the rubber gasket 15 of lower end, because it is last, hydraulic pressure area is partly born through design in following two ends, make on the spool 14, the suffered water inlet total pressure in following two ends is in a basic balance, cancel out each other, so on the spool 14, it is very little to move required Driving force down, when water level is low, ball float 20 sinks, by screw rod 13, lever 11 and key seat 6 drive spool 14 and move down, rubber gasket and valve body 1 sealing surface disengage, valve opening, current enter water tank through following innings of 19 water outlets, and when water level in the water tank constantly rose because of water inlet, ball float 20 progressively floated, through screw rod 13, lever 11, key seat 6 drives on the spool 14 and moves, when on when moving to rubber gasket 15 and being pressed in the sealing surface of valve body 1, valve is promptly closed, water inlet stops.

Claims (1)

1, a kind of barrier film balanced type float valve, comprise three-way type valve body, valve gap, spool, lever and ball float, it is characterized in that: the spool two ends are disking body, the spool upper end is loaded in the pilot hole of valve gap by key seat, key seat is pressed in the upper end disking body by spool upper end screw thread with top board and rubber film, the key seat upper end is connected with lever by bearing pin, lever connects a ball float through a screw rod, the spool lower end is loaded on down in the pilot hole of office, the disking body of lower end is fixed by nut and press table, between the disking body of spool lower end and the press table rubber gasket is arranged.