CN208138687U - air valve - Google Patents

Abstract

The utility model provides a kind of air valve.The air valve includes lower valve body, on the upper valve body for being covered on the lower valve body and from the valve bonnet that the upper valve body extends, and valve bonnet upper end side wall is equipped with multiple gas vents；Valve is equipped in the middle part of the upper valve body, the cavity of the lower valve body is provided with floating drum, one end connects the valve shaft that the floating drum other end perforation upper valve body extends to valve bonnet cavity, the floating drum is equipped with metal o-ring, the upper valve body closes on valve location and is equipped with the sealing ring cooperated with the metal o-ring, is additionally provided with soft seal ring between the metal o-ring and sealing ring；The valve shaft is equipped with the elastic device that floating drum can be allowed to move above and below in upper valve body lateral extension position.Compared with the relevant technologies, air valve flexible movements provided by the utility model, high reliablity.

Description

Air valve

Technical field

The utility model relates to water conservancy and hydropower industry technology field more particularly to a kind of air valves.

Background technique

Air valve is suitable on the pipeline that medium is water, the equipment as gas in sucking and purging line.It can be improved The efficiency and protective conduit for conveying wetting system will not be deformed, be ruptured, and be particularly suitable for mounting at pipeline after hydroturbine water intake valve valve On.

Existing air valve sealing performance is single, and poor sealing performance, structure is complicated, has biggish limitation.

Accordingly, it is desirable to provide a kind of new air valve solves the above technical problem.

Utility model content

The purpose of this utility model is to provide a kind of double sealing structures, are suitable for the air of low pressure high pressure sealing respectively Valve.

The utility model provides a kind of air valve, including lower valve body, is covered on the upper valve body of the lower valve body and from institute The valve bonnet of upper valve body extension is stated, valve bonnet upper end side wall is equipped with multiple gas vents；Valve is equipped in the middle part of the upper valve body, in institute The cavity for stating lower valve body is provided with floating drum, and one end connects the valve that the floating drum other end perforation upper valve body extends to valve bonnet cavity Axis, the floating drum are equipped with metal o-ring, and the upper valve body, which closes on valve location and is equipped with, to be cooperated with the metal o-ring Sealing ring is additionally provided with soft seal ring between the metal o-ring and sealing ring；The valve shaft is in upper valve body lateral extension position Equipped with the elastic device that floating drum can be allowed to move above and below.

Preferably, the section at position is inclined-plane and transverse undulations, the inclined-plane inclined direction in the circle of the sealing ring It is identical as gas flow, inclined-plane that can be matched is again provided on the metal o-ring；Soft seal ring is set to the metal In sealing and closes at the transverse undulations of sealing ring and abut.

Preferably, the elastic device includes the spring being sheathed on outside valve shaft and abuts the spring end and be connected to valve The locking closure of shaft end.

Preferably, the spring is stainless steel part.

Preferably, the floating drum and valve shaft are integrally formed part.

Preferably, self-lubricating bearing is equipped between the valve shaft and upper valve body.

Preferably, the soft seal ring is fixed on metal o-ring by pressing plate.

Compared with the relevant technologies, air valve provided by the utility model is had the advantages that：

One, using the valve body of all-pass gauge structure, flow is big, Quick air-discharge, air-breathing；

Two, using metal sealing box soft seal double sealing structure, when low pressure, uses soft seal, and when high pressure is close using metal Envelope, sealing performance are excellent；

Three, the air valve is sensitive, high reliablity.

Detailed description of the invention

Fig. 1 is structural schematic diagram when air valve valve provided by the utility model is closed；

Structural schematic diagram when Fig. 2 is air valve valve wide open provided by the utility model.

Specific embodiment

The utility model is described in detail below with reference to attached drawing and in conjunction with the embodiments.It should be noted that not conflicting In the case where, the feature in the embodiments of the present invention and embodiment can be combined with each other.For sake of convenience, hereinafter such as There is "upper", "lower", "left", "right" printed words, only indicates consistent with the upper and lower, left and right direction of attached drawing itself, not to structure Play restriction effect.

As shown in Figure 1 and Figure 2, the air valve packet lower valve body 1, upper valve body 2, valve bonnet 3, valve 4, floating drum 5, valve shaft 6, gold Belong to sealing ring 7, sealing ring 8, soft seal ring 9, pressing plate 10, elastic device 11 and self-lubricating bearing 12.

The upper valve body 2 is covered in the lower valve body 1, and upper valve body 2 described in the valve bonnet 3 extends.1 He of lower valve body The valve body that upper valve body 2 is constituted is full-bore valve body, and fluid cross-sectional flow area is greater than or equal to nominal diameter in valve.The valve 3 upper end side walls are covered equipped with multiple gas vents 31.The middle part of the upper valve body 1 is equipped with valve 4.

The cavity of the lower valve body 1 is provided with floating drum 5, described 6 one end of valve shaft connects in 5 other end of the floating drum perforation Valve body 2 extends in the cavity of valve bonnet 3.The floating drum 5 is an integral molding structure with valve shaft 6.The floating drum 5 is far from valve shaft 6 End is conical structure, using the buoyancy of water by its buoyance lift.

The floating drum 5 is equipped with metal o-ring 7, and the position that the upper valve body 2 closes on valve 4 is equipped with close with the metal The sealing ring 8 that seal 7 cooperates.The section at position is inclined-plane 81 and transverse undulations 82, the inclined-plane in the circle of the sealing ring 8 81 inclined directions are identical as gas flow.Inclined-plane 71 that can be matched is again provided on the metal o-ring 7.Soft seal ring 9 are set on the metal sealing 7 and close at the transverse undulations 82 of sealing ring 8 and abut.The soft seal ring 9 passes through pressure Plate 10 is fixed on metal o-ring 7.

The elastic device 11 is in upper valve body 2 for moving floating drum 5 above and below.It includes spring 111 and locking closure 112. In the outside for being sheathed on the valve shaft 6, the locking closure 112 abuts the end of the spring 111 and is connected to valve the spring 111 The end of axis 6.The locking closure 112 passes through nut（It is unlabeled）It is fixed with valve shaft 6, and abut 112 end of spring.The spring 112 be stainless steel material.

The self-lubricating bearing 12 is set between valve shaft 6 and upper valve body 2.It play the guiding role, so that floating drum 5 acts above and below When it is more flexible, be not easy card resistance.

The working principle of air valve provided by the utility model is：

The elastic force that the buoyancy and spring 111 that this air valve is generated using floating drum 5 generate, compresses sealing element and is sealed. When water level is lower than floating drum 5, floating drum 5 sinks under the effect of gravity, can carry out tonifying Qi by air valve at this time.Specially：

Exhaust：As shown in Figure 1, floating drum 5 is located at lower part in pipeline water-filling, the air in pipeline can walk exhaust through valve 4 Hole 31 is discharged.After water, floating drum 5 prevents the discharge of water, metal o-ring 7 and soft seal in buoyancy ShiShimonoseki valve closing door 4 Circle 9 is bonded with sealing ring 8, is sealed.

Tonifying Qi：As shown in Fig. 2, floating drum 5 is disengaged with pipeline water level decreasing, air valve sealing pair, valve when pipe drainage Door 4 is opened, and air enters in pipeline, to prevent from forming negative pressure in pipeline.

Compared with the relevant technologies, air valve provided by the utility model is had the advantages that：

One, using the valve body of all-pass gauge structure, flow is big, Quick air-discharge, air-breathing；

Two, using metal sealing box soft seal double sealing structure, when low pressure, uses soft seal, and when high pressure is close using metal Envelope, sealing performance are excellent；

Three, the air valve is sensitive, high reliablity.

The above description is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is applied directly or indirectly in Other relevant technical fields, are also included in the patent protection scope of the utility model.

Claims (7)

1. a kind of air valve, which is characterized in that including lower valve body, be covered on the upper valve body of the lower valve body and from the upper valve The valve bonnet that body extends, valve bonnet upper end side wall are equipped with multiple gas vents；Valve is equipped in the middle part of the upper valve body, in the lower valve The cavity of body is provided with floating drum, and one end connects the valve shaft that the floating drum other end perforation upper valve body extends to valve bonnet cavity, described Floating drum is equipped with metal o-ring, and the upper valve body closes on valve location and is equipped with the sealing ring cooperated with the metal o-ring, Soft seal ring is additionally provided between the metal o-ring and sealing ring；The valve shaft is equipped in upper valve body lateral extension position and can allow The elastic device that floating drum moves above and below.

2. air valve according to claim 1, which is characterized in that in the circle of the sealing ring section at position be inclined-plane and Transverse undulations, the inclined-plane inclined direction is identical as gas flow, and being again provided on the metal o-ring can be matched Inclined-plane；Soft seal ring is set on the metal sealing and closes at the transverse undulations of sealing ring and abut.

3. air valve according to claim 2, which is characterized in that the elastic device includes the spring being sheathed on outside valve shaft And the locking closure for abutting the spring end and being connected to valve shaft end.

4. air valve according to claim 3, which is characterized in that the spring is stainless steel part.

5. air valve according to claim 2, which is characterized in that the floating drum and valve shaft are integrally formed part.

6. air valve according to claim 2, which is characterized in that be equipped with self-lubricating axis between the valve shaft and upper valve body It holds.

7. air valve according to claim 2, which is characterized in that the soft seal ring is fixed on metal sealing by pressing plate On circle.