JPH1038115A - Air valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To considerably reduce wear caused by rubbing of earth and sands contained in a fluid and improve durability by eliminating the disturbance of flow of the fluid. SOLUTION: This air valve is constituted such that a valve element 10 and a float 8 having a seat part 9 which can contact with an separate from the valve seat 6 mounted downwardly correspondingly to the outer circumferential part of a valve hole 44 formed in a cover member 5 mounted on the top of a valve box 3 are held in the valve box 3 so as to make a free play vertical through a guide member 7. A straightening member 15 is provided in an upward fluid inflow passage 17 at the lower end part of the valve box 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for smoothly draining and filling water which is attached to a flow pipe of a fluid containing solid matter such as earth and sand such as sewage and agricultural water. The present invention relates to an air valve used for rapidly extracting air from a pipe to the outside.

[0002]

2. Description of the Related Art FIG. 3 is a longitudinal sectional view showing a conventional generally used air valve in a closed state. As is apparent from FIG. A valve box 3 having a mounting flange 2 for a communication port 1A to the valve 1
A lid 5 having a valve hole 4 attached to the upper end of the valve box 3, and a valve seat 6 attached downward to the lower end surface of the lid 5 corresponding to the outer periphery of the valve hole 4. , The above valve box 3
A ball-shaped float 8 held in a vertically movable manner via a guide member 7 having a substantially U-shaped cross section, and is covered with the ball-shaped float 8 and moves in the vertical direction together with the ball-shaped float 8. And a valve body 10 having a seat portion 9 closely or separated from the valve seat 6. An air hole 11 is formed in a peripheral wall portion near an upper end of the guide member 7, and A fluid inflow hole 12 is formed at the bottom of the member 7. In FIG. 3, 13 is disposed above the lid 5 so that the lid 5
And a cover attached so as to form a side air passage 14 between the cover and the cover.

[0003] In the air valve having the above configuration, at the time when the piping of the distribution pipe 1 is completed, the ball-shaped float 8 and the valve body 10 are held at the valve-opening position at the lowermost end of the guide member 7. When a fluid such as water flows through the flow pipe 1 in this state, the air in the flow pipe 1 flows from the communication port 1A through the valve box 3.
After flowing into the inside, it is rapidly discharged to the outside through the air hole 11, the valve hole 4 and the air passage 14 of the guide member 7. When the fluid such as water is filled in the circulation pipe 1 due to the rapid discharge of the air in the pipe 1, a part of the fluid is passed through the communication port 1 </ b> A and the passage in the valve box 3. Flows into the guide member 7 from the inflow hole 12 at the bottom of the guide member 7,
As a result, buoyancy acts on the ball-shaped float 8, and the float 8 and the valve body 10 are guided upward by the guide member 7, and the seat portion 9 of the valve body 10 comes into close contact with the valve seat 6 to close the valve hole. 4 is closed, and the air discharging operation is completed.

[0004]

The air valve having the above-described structure and the air discharging function is sometimes installed and used in a place where the flow of fluid is disturbed.
When used under such conditions, especially when the fluid contains solids such as earth and sand, the solids such as earth and sand in the fluid flowing into the valve box in a turbulent state may cause the inner surface of the valve box or the like. Since the outer surface of the guide member is rubbed violently, the inner surface of the valve box and the outer surface of the guide member are significantly worn, so that the predetermined air discharge function is impaired by short-term use or the entire air valve is easily damaged, and the durability is poor. Was something.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an air valve capable of resolving turbulence in fluid flow, remarkably reducing wear, and improving durability. I have.

[0006]

In order to achieve the above object, an air valve according to the present invention comprises a valve box, a lid having a valve hole attached to an upper end of the valve box, A valve seat attached downwardly to the lower end surface of the lid corresponding to the outer peripheral portion, a float held movably in the up and down direction via a guide member in the valve box, and covered with the float A valve body having a seat portion closely or separated from the valve seat by moving up and down together with the float, wherein a rectifying member is provided in an upward fluid inflow path of the lower end of the valve box. When the fluid in the distribution pipe flows into the valve box from the upward fluid inflow path at the lower end of the valve box, the fluid is passed through the rectifying member to be in a laminar flow state. Rectifying to eliminate turbulence in fluid flow It becomes, thereby, can be solids, such as sand in the fluid flow smoothly along the valve body inner surface and the guide member outer surface, to suppress the abrasion due to rubbing of the solid gravel or the like.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an air valve according to the present invention in a closed state, and FIG. 2 is a transverse sectional view taken along line AA in FIG.
A is the same component as the conventional example shown in FIG.
Corresponding parts are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, reference numeral 15 denotes a rectifying member which is interposed between the flange 2 of the valve box 3 and the flange 1a of the communication port 1A of the flow pipe 1 and is connected and fixed by bolts 16. As shown in FIG. 2, the use member 15 is formed by forming a number of orifice holes 15B in a plate 15A crossing the upward fluid inflow path 17.

In the air valve having the above structure, the flow pipe 1
When the fluid inside flows into the valve box 3 through the upward fluid inflow path 17 at the lower end of the valve box 3, the fluid is dispersedly passed through the many orifice holes 15B of the plate 15A in the rectifying member 15, As a result, the flow is rectified into a laminar flow state, and disturbance of the flow of the fluid in the flow pipe 1 is eliminated, and solids such as earth and sand in the fluid are removed from the inner surface of the valve box 3 and the outer surface of the guide member 7. Flows smoothly along, and wear due to rubbing of solid matter such as earth and sand is suppressed.

In the above embodiment, the rectifying member 1 is used.
5 is provided separately from the valve box 3 and is interposed in a fixed state between the communication port 1A of the distribution pipe 1 and the rectifying member 15 is provided at the lower end in the valve box 3. It may be integrated.

[0011]

As described above, according to the present invention, a rectifying member is provided in the upwardly directed fluid inflow path at the lower end of the valve box so that when the fluid in the flow pipe flows into the valve box, the fluid is supplied to the rectifying member. Flow can be rectified into a laminar flow state to eliminate disturbances in the flow of fluid, so even if solids such as earth and sand are contained in the fluid, the solids such as earth and sand will Abrasion due to severe rubbing against the outer surface of the guide member can be suppressed, and therefore, a predetermined air discharge function can be stably maintained over a long period of time, and the durability of the entire air valve can be significantly improved. This has the effect.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an air valve according to the present invention in a closed state.

FIG. 2 is a cross-sectional view taken along line AA of FIG.

FIG. 3 is a longitudinal sectional view showing a conventional air valve in a closed state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 3 Valve box 4 Valve hole 5 Lid 6 Valve seat 7 Guide member 8 Ball float 9 Seat part 10 Valve body 15 Rectifying member

Claims (1)

[Claims] 1. A valve box, a lid having a valve hole attached to an upper end of the valve box, and a valve seat downwardly attached to a lower end surface of the lid corresponding to an outer peripheral portion of the valve hole. A float held movably in the up and down direction via a guide member in the valve box; and a seat that is covered by the float and moves in the up and down direction together with the float to come into close contact with or separate from the valve seat. An air valve comprising: a valve body having a portion; and a rectifying member provided in an upward fluid inflow path of a lower end portion of the valve box.