JPH11325289A - Pressure control valve for drainage pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly lead dew condensation attached to a lower surface of a top wall to a center portion of the top wall, and return the condensed water to a waste stack by tapering the lower surface of the top wall downward to its center portion. SOLUTION: A surface under a top wall 16 is tapered to its center to show a recessed form. Dew condensation attached to a lower surface of a lower surface composing member 16B is dropped to the center portion of the lower surface, and returned to a waste stack 30 connected to a pressure control valve 1. The drew condensation attached to an inner surface of a circular side wall 15 is stored in a water reservoir groove 14, while its amount is extremely small for enabling natural evaporation. Therefore, the condensed water does not over flow from prescribed capacity of water reservoir groove 14. The dew condensation on an upper surface of a circular valve element 19 is returned into an inside circular body 5. Condensed water entering a portion between a top wall main body 16A and the lower surface composing member 16B is returned to the waste stack 30 connected to the pressure control valve 1 through a drainage hole 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pressure control valve in a drain pipe.

[0002]

2. Description of the Related Art Heretofore, the following are known as this type of pressure control valve. That is, a cylinder connected to the upper end of the drain vertical pipe, an inner ring provided at the upper end of the cylinder and having an upper end surface serving as a valve seat, and an air passage between the inner ring and the inner ring. An outer ring body provided via a connecting piece so as to be formed and having an upper end surface serving as a valve seat;
An annular side wall provided so as to form a water reservoir groove in an outer peripheral portion of the outer annular body, a top wall provided at an upper end of the annular side wall, and a valve chamber constituted by the top wall and the annular side wall In the pressure control valve in the drainage pipe having an annular valve body which is provided to be able to move up and down and abuts on the valve seat of the inner ring body and the valve seat of the outer ring body when closing the air passage when located on the lower side. It is known that a connection hole (or a communication groove) for connecting the water reservoir groove with the inside of the cylindrical body is formed in a connection piece (see Japanese Patent Publication No. 1-37628). The pressure control valve is a water droplet (hereinafter, referred to as dew water) that adheres to the inside of the valve chamber, that is, to the lower surface of the top wall and the inner surface of the annular side wall.
Can be returned to the cylindrical body through the water reservoir groove and the communication hole.

[0003]

Disadvantages of the prior art The conventional pressure regulating valve has the following disadvantages. That is, since the cross-sectional area of the communication hole (or communication groove) formed in the small connecting piece is small, it is impossible to return the dew water to the cylinder through the communication hole (or communication groove) as intended. Also, there is a fear that the communication hole (or communication groove) may be clogged.

[0004]

The present invention employs the following means to solve the above-mentioned drawbacks. The invention according to claim 1 includes a tubular body 2 connected to an upper end portion of a drain vertical pipe 30,
An inner ring body 5 provided at an upper end of the cylindrical body 2 and having an upper end surface serving as a valve seat 4, and an air passage 8 formed between the inner ring body 5 and the inner ring body 5 through a connecting piece 9. An outer ring body 11 provided and having an upper end surface serving as a valve seat 10
An annular side wall 15 provided on the outer periphery of the outer annular body 11 so as to form a water reservoir groove 14; a top wall 16 provided at an upper end of the annular side wall 15; When the valve chamber 17 is provided to be movable up and down in the valve chamber 17 formed by the side wall 15 and is located on the lower side, the air passage 10 comes into contact with the valve seat 4 of the inner ring 5 and the valve seat 10 of the outer ring 11. In a pressure control valve in a drain pipe having an annular valve element 19 to be closed, the lower surface of the top wall 16 is formed as a slope inclined downward toward the center.

[0005]

According to the present invention, the following effects can be obtained by the above configuration. According to the first aspect of the present invention, since there is no communication hole (or communication groove) formed in the small connecting piece, the drawback of the conventional pressure control valve can be solved.
According to the first aspect of the present invention, since the lower surface of the top wall is formed as a slope inclined downward toward the center, the dew condensation water adhered to the lower surface of the top wall is smoothly transferred to the center of the top wall. Then, it can be returned to the drainage pipe connected to the pressure control valve.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. The pressure control valve 1 includes a drainage vertical pipe 30.
A cylindrical body 2 connected to an upper end of the cylindrical body 2, an inner annular body 5 provided at the upper end of the cylindrical body 2 with or without a connecting ring 6 and having an upper end surface serving as a valve seat 4; At least one air passage 8 is formed in the annular body 5 so as to form the air passage 8 therebetween, specifically, four connecting pieces 9 are provided at every 90 degrees around the center C of the cylindrical body 2. An outer ring body 11 having a valve seat 10 formed at the upper end surface thereof;
An annular side wall 15 provided on the outer peripheral portion of the outer annular body 11 so as to form a water reservoir groove 14;
A top wall 16 provided at the upper end of the inner ring body 5 and a valve chamber 17 formed by the top wall 16 and the annular side wall 15 so as to be vertically movable and positioned below. And an annular valve body 19 that contacts the valve seat 10 of the outer annular body 11 to close the air passage 8.

The outer ring 11 has a first member 11A on the connection piece 9 side and a second member 11B having a valve seat 10. A fitting protrusion 21 is provided on one of the first member 11A and the second member 11B, and a fitting recess 22 is provided on the other. With such a configuration, the first member 11A and the second member 11B are detachably connected by fitting the fitting protrusion 21 to the fitting recess 22.

The top wall 16 includes a top wall main body 16A connected to the upper end of the annular side wall 15 and an annular projection 24 formed on the annular side wall 15 so as to be located below the top wall main body 16A. An outer peripheral portion is sandwiched by the top wall main body 16A, and a lower surface component 16B whose lower surface is formed as an inclined surface which is inclined downward toward the center. A drain hole 25 is formed in the center of the lower surface component 16B. Guide rods 27 are provided in a drooping manner at predetermined angles (for example, 45 degrees) about the center C on the lower surface component 16B, and these guide rods 27 gently or slightly hit the inner peripheral surface of the annular valve body 19. Is formed so as to oppose the inner peripheral surface of the annular valve body 19 with a gap therebetween, and has a function as a guide member when the annular valve body 19 moves up and down.

The annular valve element 19 is made of a material having elasticity and flexibility, but is not limited to this.

As apparent from FIG. 1, the top wall body 16A,
The annular side wall 15 and the second member 11B are integrally formed of synthetic resin or the like, and the cylindrical body 2, the connection ring 6, the inner ring 5,
The connection piece 9 and the first member 11A are made of a single body made of a synthetic resin or the like. Needless to say, members other than the annular valve body 19 that moves up and down may be divided and manufactured at any position for convenience of manufacture.

[0011]

Next, the operation of the embodiment of the present invention will be described. When the pressure inside the drainage vertical pipe 30 becomes negative due to the flow of the drainage, the portion of the annular valve body 19 facing the air passage 8 is pushed upward by atmospheric pressure, and the annular valve body 19 rises, and the air from the air passage 8 rises. Flows into the vertical drainage pipe 30.
Then, when the inside of the drainage vertical pipe 30 returns to the atmospheric pressure, the annular valve body 19 descends by its own weight and comes into close contact with the valve seats 4 and 10.

Since the lower surface of the top wall 16 (specifically, the lower surface of the lower surface component 16B) is formed as an inclined surface which is inclined downward toward the center, the lower surface of the top wall 16 (specifically, the lower surface component member) is formed. Condensed water adhering to the lower surface of the top wall 16 (specifically, the lower surface of the lower surface component 16B) smoothly returns to the vertical drainage pipe 30 connected to the pressure control valve 1. . The dew water adhering to the inner surface of the annular side wall 15 is stored in the water reservoir groove 14, but its amount is extremely small, and the amount of water that naturally evaporates is larger than the amount actually stored in the water reservoir groove 14. If the capacity of the groove 14 is set to a predetermined size, the dew condensation water does not overflow from the water sump groove 14. The dew water adhering to the upper surface of the annular valve body 19 returns to the inside of the inner annular body 5. Condensed water that has entered between the top wall main body 16A and the lower surface component 16B passes through the drain hole 25 through the pressure control valve 1.
Return to the drainage vertical pipe 30 connected to.

[0013]

[Modifications and the like] Modifications and the like will be described below. (1) The top wall 16 only needs to have a lower surface inclined downward toward the center. That is, the top wall main body 16A and the lower surface component 16B may be integrated, and the top wall main body 16A
When and the lower surface component 16B are integrated, a gap between them may or may not be provided. Also, the top wall main body 16A
, The lower surface component 16B may be connected to the annular side wall 15, and the top wall 16 may be configured only by the lower surface component 16B. (2) The lower surface of the top wall 16 (lower surface constituent member 16B) is arbitrary, such as an inverted cone shape, an inverted truncated cone shape, an inverted pyramid shape, and an inverted truncated pyramid shape. (3) The material of each member constituting the pressure control valve 1 is arbitrary. (4) Lower surface component 16B, annular side wall 15, outer annular body 1
1, inner ring 5, connecting ring 6, cylinder 2, and annular valve 19
Are planar, and the planar shape of the top wall main body 11A is a disk shape. The planar shape of the drain vertical pipe 30 is annular.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 pressure control valve 2 cylinder 4 valve seat 5 inner ring 6 connecting ring 8 air passage 9 connecting piece 10 valve seat 11 outer ring 11A first member 11B first member 14 water reservoir groove 15 annular side wall 16 top wall 16A Top wall body 16B Lower surface component member 19 Annular valve element 30 Drainage vertical pipe

Claims (1)

[Claims] 1. A tubular body 2 connected to an upper end of a drainage vertical pipe 30, an inner annular body 5 provided at an upper end of the tubular body 2 and having an upper end surface serving as a valve seat 4, and an inner annular body 5 The outer ring 11 is provided with a connecting piece 9 so as to form an air passage 8 between the outer ring 11 and an upper end surface of the outer ring 11, and a water reservoir is formed on the outer periphery of the outer ring 11. An annular side wall 15 provided to form the groove 14, a top wall 16 provided at an upper end of the annular side wall 15,
When the valve chamber 17 is provided to be movable up and down in the valve chamber 17 constituted by the annular wall 6 and is located on the lower side, it comes into contact with the valve seat 4 of the inner ring body 5 and the valve seat 10 of the outer ring body 11 to allow air to flow therethrough. A pressure control valve in a drain pipe having an annular valve body 19 for closing the passage 10, wherein the lower surface of the top wall 16 has a slope inclined downward toward the center. .