CN87210480U

CN87210480U - Composite exhausting valve with double outlet

Info

Publication number: CN87210480U
Application number: CN 87210480
Authority: CN
Inventors: 缪平溪
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-08-24
Filing date: 1987-08-24
Publication date: 1988-05-25

Abstract

Disclosed is a composite exhausting valve with double air discharging openings, belonging to the valve used for the water discharging pipeline. The main characteristic of the utility model is that one float in the prior air discharging valve is changed into an air discharging valve flap to be stacked on the other float in the same valve cavity. Meanwhile, a big air discharging opening is provided with a screen in order to prevent the dirt and the small animal from being sucked into the pipeline. The composite exhausting valve with double air discharging openings provided by the utility model has the advantages of simple structure, light weight, small size and low cost and keep the cleanness of the pipeline. The utility model is an ideal air discharging valve for the ventilating of the water discharging pipeline.

Description

Composite exhausting valve with double outlet

The utility model system belongs to the valve class that is used on the aqueduct.

At conduit pipe

Peak the outlet valve that is used for getting rid of air in the aqueduct all is installed, otherwise can be, even the phenomenon that stops can occur owing to airtrapping reduces the loss of head that flow cross-section increases pipeline in pipeline.The effect of outlet valve not only can exhaust but also also can suck air when pipeline is needed emptying or produces negative pressure, thereby avoids because the generation negative pressure causes the distortion or the fracture of conduit pipe.For a long time, the outlet valve that uses on aqueduct is two-chamber twoport outlet valve or Single Opening Exhaust Valves, when air displacement is big, floats and block the aperture because the eddy current of single face side air admission formation makes ball float be subjected to uneven active force, thereby cause outlet valve malfunctioning.Once there was the people that it was carried out improvement, and solved the problems referred to above to a certain extent, but owing to still adopt the structural type of two-chamber twoport, so also exist complex structure, deficiency such as with high costs.

The purpose of this utility model is improved the structure of existing single chamber outlet valve, makes it to reach the effect of twoport, and simply dexterousr than existing two-chamber twoport exhaust structure, and a kind of combined type twoport outlet valve promptly is provided.

Combined type twoport outlet valve provided by the utility model mainly is made up of valve body (1), the float (2) that has sealing gasket (7), support tube, exhaust flap, seal ring (5), screen cloth (6), bonnet (11), guide blot (12) etc.Its large and small relief opening and float all are positioned among the same valve pocket.Above float, big exhaust ports has one by the guide rod that has little relief opening (10), the big exhaust flap that sealing surface (4) is formed.The upper and lower end of float system below the little relief opening is that curved surface and top-surface camber top are provided with a hollow cylinder that is used to seal the rubber seal (7) of little relief opening.The exhaust flap of float and float top, guide blot is an axisymmetric with the center line of valve body (1) all.Big exhaust flap and contacted of sealing surface (5) can be that curved surface also can be the plane; The support tube of float can also can adopt removable structure for one with valve body is continuous, and plate shaped convex edge, upper end is located in the valve body, and the top of support tube is provided with vent (8) or air vent (8), and the bottom is provided with water port (9) or (9).In addition, the utility model also is provided with screen cloth, can prevent from that dirt etc. is inhaled in the pipeline to go.

Be illustrated below in conjunction with 1,2 pairs of most preferred embodiments of the present utility model of accompanying drawing, Fig. 1 a, b are respectively the utility model embodiment's structure and fundamental diagram, and wherein Fig. 1 a is big exhaust open state, and Fig. 1 b is a float gas port opening state.This embodiment is by valve body (1), has the float (2) of rubber gasket (7), has the casing (3) of exhaust port and water port, big exhaust flap, and O-ring seal (5), screen cloth (6), bonnet (11), guide blot (12) and bolt are formed.Wherein the exhaust flap by a stainless steel bar that has a little relief opening of T font and the semi circular surface that is used for sealing big relief opening forms, between them with the nut connection, stainless steel bar can to-and-fro motion in guide blot (12).The hollow cylinder that float (2) is is curved surface by a upper and lower end.It and float gas port surface of contact are provided with a rubber pad (7).The exhaust flap of float and float top, guide blot is an axisymmetric with the center line of valve body (1) all.

Another embodiment of the present utility model sees shown in Figure 2, and its difference from Example 1 is that support tube and valve body fix as one, promptly by by 4 connecting bands support tube (3 ') and valve body (1) being fused.In addition, the exhaust flap is by a stainless steel bar that has a little relief opening be used for sealing that the plane of big relief opening forms.

Before the aqueduct water flowing, be in anhydrous, pressure-less state in the pipeline, big exhaust flap drops on the float, and drops on together in the support tube with float.During water-filling, a large amount of air are discharged from big relief opening, and after the air in pipe drained, water can enter in the valve body, and the water that enters then in the valve body floats float, and the float that is held up holds up big exhaust flap again, blocks big relief opening.Because the aperture of the guide rod bottom in the exhaust flap is contacting of " dealing with soft tactics firmly " with sealing gasket (7), so little relief opening can be sealed up.After air drained, large and small relief opening all was in closed state, because the effect of hydraulic pressure (or air pressure), outlet valve is urged very tightly, and valve both can not fall down, and water also can not flow out.Having under the situation of pressure, entering the little air that separates out in pipeline and the water successively can accumulate in the outlet valve, when air accumulation after a certain amount of, float can separate with big exhaust flap because of drawdown in the valve, expose the little relief opening under the big exhaust flap, the long-pending little air that has just can be discharged from little relief opening, treat that air drains after, float floats again, and blocks little relief opening again.If pipeline produces negative pressure, then the exhaust flap also can be inhaled and fall, and a large amount of air can enter pipeline from big relief opening, can prevent that conduit pipe is subjected to stress deformation.In order to prevent that dirt and toy etc. are sucked into pipeline, the utility model also is provided with screen cloth (6) in big exhaust ports.

In sum, compared with the prior art the utility model has following features: 1) existing air bleeding valve is finished respectively big exhaust and little exhaust work by two exhaust outlets and two ball floats, the utility model is one of them float to be changed over the exhaust flap overlay in the same cavity above the float, simplify the structure, dwindle volume, alleviated weight; 2) volume of float designs according to the volume of valve pocket, so Rong Tida, and buoyancy is big, is convenient to improve design work pressure; 3) little exhaust outlet is the aperture that is applied on the guide rod, the rubber blanket on dependence float top seals, actual working pressure than the low situation of the operating pressure of design under, increase capacity thereby can enlarge the aperture, and existing air bleeding valve aperture to be the rubber that can not enlarge arbitrarily chew mouth; 5) the utility model is provided with screen cloth, can prevent from that dirt etc. is inhaled in the pipeline to go. By as seen above-mentioned, the utlity model has simple in structurely, in light weight, volume is little, and is with low cost, can keep the advantages such as duct cleaning, is a kind of desirable air bleeding valve of aqueduct ventilation usefulness.

Claims

1, a kind ofly form outlet valve, it is characterized in that by valve body (1), bonnet (11), support tube (3), float (2):

A) also having one is positioned at same valve pocket and keeps bar (10), the exhaust flap that sealing surface (4) is formed by what have a little relief opening with float (2) is overlapping;

B) described float is to be that curved surface and top-surface camber top are provided with a rubber seal (7) that is used to seal little relief opening the upper and lower end.

2, according to the described outlet valve of claim 1, it is characterized in that the exhaust flap of float (2) and float top, guide blot is an axisymmetric with the center line of valve body (1) all.

3,, it is characterized in that big exhaust flap and contacted of sealing surface (5) can be that curved surface also can be the plane according to claim 1,2 described outlet valves.

4, according to claim 1,2 described outlet valves, it is characterized in that the support tube of float can be connected as a single entity with valve body, also can adopt removable structure.

5,, it is characterized in that being provided with screen cloth (6) in big exhaust ports according to claim 1,2 described outlet valves.