JPH04126076U - Lever type composite air valve - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the height dimension of an air valve consisting of a sub float 17 that opens and closes a large valve seat 20 and a main float 8 that opens and closes a small valve seat 4 by lever action. [Structure] A valve cylinder 1 having an inlet 2 at the bottom, a valve lid 3 having a small valve seat 4 at an eccentric position, a main float 8 that swings around a fulcrum 10 to open and close the small valve seat 4, Pedestal 1 at the bottom of valve cylinder 1
1, a large valve seat 20 in the center of the valve cover 3, a hole chamber 13 bored in the center of the main float 8 and having a drainage hole 15 at the bottom, and a large valve placed in the hole chamber 13. Sub-float 1 that opens and closes the seat 20
It consists of 7.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a lever-type air valve installed in water pipes, etc., and is particularly suitable for large-scale exhaust systems. This invention relates to a lever-type composite air valve having the following functions.

0002

[Conventional technology]

2. Description of the Related Art Conventionally, a lever-type composite air valve as shown in FIG. 4, for example, has been known. This conventional In the example, 1 is a valve cylinder having an inlet 2 at the bottom, and 3 is at the top of this valve cylinder 1. It is a valve cover that is attached and has a small valve seat 4 at an eccentric position, and 8 opens and closes the small valve seat 4. 20 is a large valve seat, and 17 is a sub-float that opens and closes this large valve seat 20. 24 is a bracket for holding this sub-float 17, and 26 is a bracket for holding this sub-float 17. It is a through hole provided in the. In this device, mass exhaust is performed from the large valve seat 20, When the large volume exhaust is finished and the valve is filled with water, the large valve seat 20 is blocked by the secondary float 17, and When air accumulates in the rear valve, the main float 8 swings around the edge 34 of the small valve seat 4 as a fulcrum. Then, the small valve seat 4 is opened with a lever action.

0003

[Problem that the idea aims to solve]

In the above configuration, since the sub-float 17 is provided above the main float 8, the height dimension is There is a problem with getting bigger.

0004 This invention eliminates the problems of the conventional lever-type compound air valve as mentioned above, and has a high The purpose of the present invention is to provide a compact composite air valve with small dimensions.

[0005]

[Means to solve the problem]

In order to achieve the above object, the lever type compound air valve according to this invention has an inlet at the bottom. and a valve cover that is attached to the top of the valve cylinder and has a small valve seat at an eccentric position. , the small valve seat is pivoted around a fulcrum located outside the center of the small valve seat, and the small valve seat is levered. A cone-shaped main float that opens and closes, and a pedestal installed at the bottom of the valve cylinder to hold the main float. , a large valve seat in the center of the valve cover, and a hole drilled in the center of the main float with a drainage hole at the bottom. It consists of a chamber and a pillar-shaped or conical sub-float that is placed in this hole chamber and opens and closes the large valve seat. Ru.

[0006]

[Effect]

During initial mass evacuation, the main float is seated on the pedestal, and the secondary float is seated at the bottom of the hole chamber. Ru. Air enters from the inlet, passes through the area around the pedestal and the outer space of the main float, and then exits from the large valve seat. Discharge. When the valve cylinder is filled with water, the large valve seat is blocked by the secondary float, and the small valve seat is blocked by the main float. more obstructed. With the subsequent air accumulation, the main float swings around the fulcrum and the small valve Open the seat and let the air out. When inhaling air from the large valve seat with negative pressure inside the valve cylinder, the hole The water in the chamber is drained through the drain hole. The secondary float is placed in the hole chamber of the main float, so it can be made smaller. achieve.

[0007]

【Example】

Figure 1 is a cross-sectional view of one embodiment of this invention, showing when the inside of the valve cylinder is filled with water. However, the two-dot chain line in the figure indicates that air accumulates in the valve cylinder after the valve cylinder is filled with water, and the main float 8 Indicates when it is swinging downward.

[0008] In this figure, 1 is a cylindrical valve barrel, 2 is an inlet at the bottom of the valve barrel 1, and 3 is a cylindrical valve barrel. The valve cover is screwed onto the upper part of the valve cylinder 1, and 4 is a small valve seat made of an elastic body. The valve seat 4 is attached to a protruding seat 5 which protrudes downward at an eccentric position of the valve cover 3 and has a male thread. When seated, the mounting cover 6 with a female thread is screwed into the protrusion seat 5, and the small valve seat 4 is fixed. . Reference numeral 7 designates a small valve port that is bored in the protruding seat 5 and communicates the small valve seat 4 to the atmosphere side. 8 is at the top The main float is shaped like a truncated cone and has a maximum outer diameter smaller than the inner diameter of the valve cylinder 1. The outer space 30 becomes a mass exhaust passage. The upper surface 27 of the main float 8 opens and closes the small valve seat 4. . 9 indicates that when the upper surface 27 of the main float 8 pushes the small valve seat 4 and closes it, the upper surface 27 is horizontal. A plurality of upper limit stops are provided on the inner wall of the valve lid 3. A bumper 9 is provided protrudingly.

[0009] 10 is a fulcrum when the main float 8 opens and closes the small valve seat with lever action, and is the fulcrum of the valve cover 3. It is provided to protrude outward from the center of the small valve seat 4 on the inner wall. This fulcrum 10 is the upper limit point. Together with the topper 9, the upper limit position of the upper surface 27 is determined, so that the upper surface 27 of the main float 8 is small. It is possible to keep the valve seat horizontal while closing it by pushing the valve seat 4. The center of the main float 8 has a cylindrical shape. A hole chamber 13 is provided at the bottom of the hole chamber 13, and a drain port 15 facing the inlet 2 is provided at the bottom of the hole chamber 13. will be provided.

0010 In the center of the valve cover 3, a large valve seat 20 made of an elastic body is attached to a screw with a large valve opening 22 formed therein. It is fixed with a built-in presser 21. A large valve seat 20 is provided in the hole chamber 13 for opening and closing. A secondary float 17 is placed. This sub-float 17 has a cylindrical shape. Also, the bottom of valve cylinder 1 A plurality of pedestals 11 are formed. Therefore, from the inlet 2 to the periphery 1 of the pedestal 11 2 and the outer space 30 of the main float 8, from above the main float 8 to the large valve seat 20. A passage is formed.

[0011] The operation of this embodiment will be explained. The inside of the valve cylinder is filled with air and a large amount of air is exhausted. In this state, the main float 8 rests on the pedestal 11. In addition, the secondary float 17 is located in the hole chamber 13. It's sitting on the bottom. A large amount of air flows from the inlet 2 to the periphery 12 of the pedestal and the outside of the main float 8. Exhaust is exhausted to the large valve port 22 via the side space 30, above the main float, and the large valve seat 20.

0012 When the valve cylinder is filled with water after the large volume exhaust is finished, the main float 8 becomes buoyant as shown in Figure 1. It rises and contacts the fulcrum 10 and the upper limit stopper 9, and also pushes the small valve seat 4 to close it. The upper surface 27 is kept horizontal while closing. In addition, the secondary float 17 also rises due to buoyancy and the large valve seat 2 Block 0.

[0013] Next, the case where air enters from the inlet 2 and is stored in the valve cylinder will be explained. air As the buoyancy of the secondary float 17 decreases as it accumulates, the secondary float 17 pushes the large valve seat 20. Although the force is reduced, the pressure inside the valve cylinder 1 presses the secondary float 17 against the large valve seat 20. Since the force exists, the large valve seat 20 is not opened. The main float 8 also reduces its buoyancy and descends. try At this time, the pressure inside the valve cylinder 1 presses the upper surface 27 against the small valve seat 4, but The force that opens the small valve seat 4 due to the lever action centered on point 10 is stronger, so the small valve seat 4 opens. Open the valve.

[0014] When the inside of the valve cylinder 1 becomes negative pressure, the sub float 17 first separates from the large valve seat 20, and then Air is sucked into the valve cylinder 1. At this time, the water in the hole chamber 13 flows from the drain hole 15 to the inlet. 2, and the sub-float 17 is seated on the bottom of the hole chamber 13. As the inside of valve cylinder 1 becomes empty, The main float 8 also descends and seats on the pedestal 11.

[0015]

[Example 2] FIG. 2 shows an example in which Example 1 is further improved. At the outer edge of the upper surface 27 of the main float 8, Protrusions 25 are provided at several locations. The diameter of the outer circumference of this protrusion 25 is at right angles to the inner circumference of the valve cylinder 1. Since it is made slightly smaller than the diameter, the main float 8 is connected to the upper limit stopper 9 and the fulcrum 10. When the main float 8 floats to the top, the center position of the main float 8 coincides with the center position of the valve cylinder 1. Therefore There is no possibility that the side wall of the main float 8 approaches the inner wall of the valve cylinder 1 unevenly. Therefore, the main float When the child 8 swings downward, the edge 31 of the lower surface of the main float 8 and the inner wall of the valve cylinder 1 contact friction. There is no rubbing, resulting in smooth operation.

[0016] Further, one of the protrusions 25 is provided with a split groove 35, and this split groove 35 has the following features: A pin 36 that fits into the fulcrum 10 and projects downward is inserted. Therefore, the main float 8 rotates. Therefore, the protrusion 25 always remains at the fulcrum 10, and the main float 8 swings. The leverage of time is constant.

[0017] Since the secondary float 17 has a truncated cone shape with a large diameter at the top, the diameter of the large valve seat 20 can be increased. This improves the capacity for mass exhaust. In addition, there is a straight line on the inner wall of the hole chamber 13. Since the protrusion 23 is provided to eliminate the positional fluctuation of the sub-float 17, it can be adjusted against the large valve seat 20. The seating part of the secondary float 17 is always constant, so the diameter of the large valve seat 20 can be increased. This improves the capacity for mass exhaust.

[0018] The top of the sub-float 17 is a truncated cone with a diameter that becomes smaller toward the top and a valve seat that has a larger diameter at the bottom. A protrusion 18 slightly smaller than the inner diameter of 20 protrudes. Therefore, the secondary float 17 There is no displacement when closing the large valve seat 20. Therefore, the diameter of the large valve seat 20 should be increased. This improves exhaust capacity.

[0019] A radial groove 19 is provided on the lower surface of the sub-float 17. Therefore, the air from the drain hole 15 Air is exhausted above the main float 8 through the radial groove 19 and the space 29 on the outer circumferential side of the sub float. , the pressure on the lower surface of the sub-float 17 is not increased much. Therefore, the sub-surface may come up while exhausting a large amount of air. The problem of the child 17 blocking the large valve seat 20 does not occur.

[0020]

[Effect of the idea]

This device has the above-mentioned configuration, and the secondary float that opens and closes the large valve seat is inserted into the hole in the main float. Since it is placed in a chamber, the height of the lever type composite air valve is reduced.

[Brief explanation of drawings]

FIG. 1 is a sectional view from the front of a lever-type composite air valve according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a lever-type composite air valve according to another embodiment of the present invention, seen from the front;

FIG. 3 is a sectional view taken along planes 40 and 41 of FIG. 2;

FIG. 4 is a cross-sectional view of a conventional lever-type composite air valve seen from the front.

[Explanation of symbols]

1 Valve tube 2 Inlet 3 Valve lid 4 Small valve seat 8 Main float 10 Fulcrum 11 Pedestal 13 Hole room 15 Drain hole 17 Secondary float 20 Big Benza

Claims (1)

[Scope of utility model registration request] Claim 1: A valve cylinder having an inlet at the bottom thereof, a valve cover attached to the upper part of the valve cylinder and having a small valve seat at an eccentric position, and a valve cover that is oscillated about a fulcrum located outside the center of the small valve seat. a cone-shaped main float that moves to open and close the small valve seat by lever action;
A pedestal provided at the bottom of the valve cylinder to carry the main float, a large valve seat in the center of the valve lid, a hole chamber bored in the center of the main float and having a drainage hole in the bottom, and this hole chamber. A lever-type composite air valve characterized by comprising a pillar-shaped or cone-shaped sub-float that is placed on the valve seat and opens and closes a large valve seat.