CN87217539U - Horizontal automatic discharge valve - Google Patents

Abstract

A horizontal automatic discharge valve of the utility model is an automatic discharge valve which is used for automatically discharging the stored gas in a pipeline in a water supply system, a warm-water heating system, a fan calandria air conditioning system and similar liquid circulation working systems. The valve adopts a novel valve sealing mechanism, which makes the influence for sealing elements from the pressure difference of the inner and the exterior of the system be reduced to the minimality and the working of the valve become more sensitive and reliable. The utility model has the advantages of compact design, beautiful appearance. J[-130].

Description

Horizontal automatic discharge valve

What this model utility related to is a kind of automatic control pressure vent that is used for trapped gas in the automatic discharge conduit of water system, warm water heating system, blower fan comb air-conditioning system and similar liquid periodic duty system.

In water system, warm water heating system, blower fan comb air-conditioning system,, therefore need the gas that accumulates in the discharge conduit because a variety of causes often has gas to take place, and too much gas accumulation will form the proper functioning that vapour lock influences system in pipeline.

The various automatic control pressure vents that use mostly are to utilize float lever mechanism to drive a closure member sealing exhaust outlet at present.Be gas when entering outlet valve float sink to opening Sealing by leverage gas is discharged; And water or liquid when entering outlet valve float float and by leverage Sealing closed to prevent fluid seepage.The problem that this outlet valve exists is that internal system pressure is very big to the influence of Sealing, and the high more influence of system pressure is big more.Because the valve inside and outside differential pressure is very big, and the pressure in the pipeline will be pressed in Sealing on the valve seat, therefore valve can be opened under working pressure when valve cuts out, float must have the weight of certain needs, that is to say from the opening of valves angle to see that float is heavier better.But Sealing also will be closed with leakage proof by the buoyancy of float except that pressured difference sealing when valve cut out, and saw that from closing angle float buoyancy is the bigger the better, and that is to say that deadweight is light more good more.Opening of valves and close the requirement that the weight of float has been proposed mutual contradiction like this, the big more contradiction of system works pressure is just outstanding more.

The purpose of this utility model provides a kind of novel automatic exhaust valve arrangement, make Sealing be subjected to the influence of system works pressure to reduce to minimum, simultaneously the structure of shell has also been carried out improving making structure compact more with the sensitivity that improves valve work and reliability, profile is more attractive in appearance.

The purpose of this utility model is achieved in that this outlet valve has the right-hand member of the housing housing of a steel that an import is arranged, and lower part of frame has an outlet, and this housing is serially connected in the pipe-line system by the highest point at pipeline.The left end of housing is welded with a screwed termination, and an end cap is screwed in the termination and by seal ring and makes housing seal.Stretch out in the hole of exhaust valve, be fixed on the housing by joint and sealing gasket with nut by case top.The flap that partly there is a long thin-walled tubulose of a shoulder hole at the center of valve body can slide by easy on and off in than the hole of minor diameter at the valve body center.Retainer is contained in the valve body shoulder hole diameter than in the macropore, and it is equipped with an O-ring seals in end slot down and seals with the outer garden of tubulose flap.A valve seat is screwed in its heart portion of upper end of shoulder hole by a rubber cushion being arranged and being pressed on the upper-end surface of retainer.The lever left end of a fork-shaped is hinged to the lug of lower extension part with pin and valve body, and right slightly place is hinged with pin with tubulose flap lower end, and right-hand member connects with a float.Like this when in the housing during gassy float fall to driving the tubulose flap and fall to making tubulose flap upper end to leave with rubber cushion, gas is got rid of from the joint through the hole of tubulose flap center on retainer and valve body.When in the housing during full of liquid float come-up drive tubulose flap its upper end of rising and be against on the rubber cushion in the valve seat and keep sealing.

So the valve system that the utility model proposes is because adopted thin-walled tubulose flap valve internal pressure when valve cuts out that the active force of flap is reduced greatly, the weight of float also just can reduce accordingly when guaranteeing that valve is opened under working pressure, therefore when float floats, just there is bigger buoyancy to be used for closing function, makes the work of valve sensitive more reliable.

Concrete structure of the present utility model is provided by following examples and accompanying drawing thereof.

Accompanying drawing one is the horizontal automatic control pressure vent embodiment of a utility model longitudinal sectional view.

This outlet valve has the housing 17 of a welding fabrication, and its lower right part has an import, and an outlet is arranged at the bottom.Left end has an end cap 4 usefulness screw threads to be screwed in the housing left end to be welded in the termination 18 on the housing, and uses 5 sealings of O shape circle.Stretch out in the hole of valve body 3 by housing 17 tops by nut 7 joints 6 and sealing gasket 12,13 and housing and fix.Tubulose flap 14 can slide up and down in the hole of valve body 3, and the outer garden sealing of O shape circle 11 and tubulose flap 14 is housed in the groove of retainer 10 bottoms.Valve seat 8 is screwed in the hole of valve body 3 upper ends rubber cushion 9 wherein is housed, and valve body and retainer upper end have that several holes or groove communicate with hole in the joint and towards atmosphere.Wishbone lever 15 left ends are hinged to the lug of lower extension part left end with pin 1 and valve body, and right slightly place is hinged with pin 2 and tubulose flap 14, and right-hand member connects with float 16.Whole outlet valve is positioned on the highest point of pipe-line system and is serially connected in the system when the full gas of housing 17 inner products float 16 to sink to driving tubulose flaps 14 and move down and its upper end and rubber cushion 9 are broken away from make gas 19 to be discharged through joint 6 through the hole.When after the gas emptying in the housing during full of liquid float 16 float to drive and move its upper end on the tubulose flap 14 and be against on the rubber cushion 9 valve cuts out.

Because the utility model has adopted the flap 14 of hollow tubular, so the pipe-line system internal pressure reduces to make the opening and closing of valve sensitiveer reliable to the active force of flap greatly.

Claims (1)

1, the utility model is a kind of automatic control pressure vent that is used for trapped gas in the automatic discharge system of fluid circulation system, it comprises a housing, there are an import and an outlet to connect on the housing with pipe-line system, stretch out in the top-portion apertures of a valve body by housing and be fixedly connected with housing, the lever left end of a fork-shaped is hinged to the lug of lower extension part with pin and valve body, right-hand member connects with float, partly there is a shoulder hole at the center that it is characterized in that valve body, the tubulose flap of a thin-walled is contained in the hole of this shoulder hole than minor diameter, retainer is contained in the bigger hole of shoulder hole, the cylindrical sealing of one zero RunddichtringO and tubulose flap is housed in its lower end groove, valve seat is screwed in the upper end of shoulder hole with screw thread, a rubber cushion is housed in the groove of its heart portion and is pressed on the upper-end surface of retainer, the lower end and the lever of tubulose flap are hinged, the left end of housing is welded with a female termination of processing, and an end cap is screwed in wherein and seals by zero type circle.

Images