JP5753741B2 - Intake and exhaust valves - Google Patents

Description

  The present invention relates to an intake / exhaust valve provided in a water supply pipe.

Patent Document 1 below discloses an intake / exhaust valve provided in a water supply pipe.
This intake / exhaust valve is provided at the top of the water supply pipe and exhausts the air in the water supply pipe to the outside during water supply and prevents the water in the water supply pipe from leaking to the outside. It is configured to smoothly drain water by inhaling air.

  This type of intake / exhaust valve includes a float valve for preventing leakage of water. This float valve is made of a material having a specific gravity smaller than that of water, and is accommodated in a valve chamber formed in the valve body so as to be vertically displaceable. When the water level in the valve chamber rises, the float valve rises and abuts the tapered valve seat around the valve port communicating with the intake / exhaust port to close the valve port.

  In some cases, the valve seat is made of an elastic material such as rubber in order to improve the sealing performance of the valve mouth, and the valve mouth is closed while the valve seat is slightly compressed by a float valve.

  When the water level in the valve chamber decreases, the float valve descends away from the valve port and sits on a seat provided below the valve chamber. As a result, outside air is taken into the water supply pipe from the intake / exhaust hole via the valve chamber, and the water in the water supply pipe is drained to the outside. The seat on which the float valve is seated is provided with a drainage groove, and the water in the valve chamber is drained into the water supply pipe through the drainage groove.

Utility Model Registration No. 3007623

In the above conventional intake / exhaust valve, when the valve seat around the valve port communicating with the intake / exhaust hole is formed of an elastic material, the portion where the float valve contacts / separates is a flat surface. And surface contact. In this case, hardly valve seat is compressed, suitable sealing of the valve port is a problem called difficult to ensure in particular the water pressure is less fine pressure range.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an intake / exhaust valve that improves the sealing performance of a valve port communicating with an intake / exhaust hole.

  In order to achieve the above object, the present invention is provided in a water supply pipe, exhausts air in the water supply pipe to the outside at the time of water supply, and prevents the water in the water supply pipe from leaking to the outside. An intake / exhaust valve that draws air into the water supply pipe to drain water, and is provided in the valve chamber, below the valve chamber, connected to the valve chamber and the water supply pipe, and above the valve chamber An intake / exhaust hole that is provided and communicates with the valve chamber and that is open to the outside air; and a valve port that is provided at the upper portion of the valve chamber and is formed of an elastic material and that communicates with the intake / exhaust hole and a tapered shape formed around the valve port. A seal member having a valve seat, and a spherical float valve that is accommodated in the valve chamber so as to be displaceable in the vertical direction and is made of a material having a specific gravity smaller than that of water, and that opens and closes the valve port by contacting and separating from the valve seat. Slightly at the part of the seat where the float valve contacts and separates It is characterized in that the formation of the projection group.

In order to further improve the sealing performance of the valve port by the float valve, the central angle of the valve seat is preferably 120 ° ≦ α ≦ 150 °.
In order to prevent biting of the float valve, the ratio of the float valve diameter D ₁ and the valve diameter D ₂ is preferably 0.65 ≦ D ₂ / D ₁ ≦ 0.75. . Further, it is preferable that the valve seat is made of rubber and the rubber hardness is 65 ≦ Hs ≦ 75.
The microprojection group can be composed of, for example, a plurality of protrusions formed concentrically around the valve opening.
In this case, the height L ₁ of the plurality of protrusions is preferably 5 ≦ L ₁ ≦ 15 μm, and the pitch P ₁ is preferably 30 ≦ P ₁ ≦ 50 μm.
The plurality of protrusions can be easily formed by cutting a mold for forming the seal member.

  In the intake / exhaust valve of the present invention, when the valve is closed, the float valve crushes the minute protrusion group, so that a high sealing performance of the valve opening can be ensured even in a minute pressure region.

Sectional drawing which shows the whole structure of the intake / exhaust valve of this invention. Sectional drawing of the component of the intake / exhaust valve of this invention. It is explanatory drawing which shows the detail of the float valve and sealing member of the intake / exhaust valve of this invention, Comprising: (b) is the partially expanded view of (a). It is explanatory drawing which shows the detail of the principal part of the intake / exhaust valve of this invention, Comprising: (a) is an inner surface figure of the cover member which mounted | wore with the sealing member, (b) is the partially expanded view of (a). (C) is the sectional view on the A-A 'line of (b). Explanatory drawing which shows the effect | action of the intake / exhaust valve of this invention.

FIG. 1 is an explanatory view showing the overall structure of the intake / exhaust valve of the present invention.
The intake / exhaust valve 100 has a valve main body 110, and a valve chamber 114 communicating with the water supply / drain port 112 is formed in the valve main body 110. A tapered seat 120 is provided between the water supply / drain port 112 and the valve chamber 114, and a spherical float valve 130 is disposed in the valve chamber 114.

  The float valve 130 is formed of a plastic material having a specific gravity of about 0.8, such as polypropylene (PP), and floats on the water when the water is supplied into the valve chamber 114, and sits on the seat 120 when the water is not supplied. A screw portion 144 is provided on the top of the valve body 110, and the lid member 140 is screwed together. The lid member 140 has an intake / exhaust hole 142 communicating with the valve chamber 114 and opened to the outside air. An annular seal member 150 formed of an elastic material such as rubber is fixed inside the lid member 140. The seal member 150 has a valve port 152 communicating with the intake / exhaust hole 142, and a tapered float valve contact portion 160 is formed at an edge portion of the valve port 152 facing the float valve 130. It functions as a valve seat. An O-ring 170 is inserted between the valve body 110 and the lid member 140 to prevent water leakage.

FIG. 2 is an explanatory view showing details of components of the intake / exhaust valve of the present invention.
The valve body 110 has a male thread portion 116 for attachment to a water supply pipe on the outer periphery of the water supply / drain port 112. Four drainage grooves 122 (see FIG. 5) are formed in the sheet 120 formed between the water supply / drain port 112 and the valve chamber 114. A female threaded portion 144 a is formed on the inner wall portion of the top portion of the valve body 110.

  A male threaded portion 144b is formed on the outer periphery of the lid member 140, and two bottomed tool holes 146 are provided on the upper surface of the lid member 140 as engaging portions with which a tool for mounting is engaged. The lid member 140 can be firmly fixed to the valve main body 110 and can be easily detached from the valve main body 110 by engaging and rotating the tool in the tool hole 146. Easy maintenance is possible.

FIG. 3 is an explanatory view showing details of the float valve contact portion 160 of the seal member 150. Diameter _{D 1} of the float valve 130 is, for example, a 19 mm (3/4 inch), diameter _{D 2} of the valve port 152 of the seal member 150 is 13.5mm, for example. The float valve contact portion 160 provided at a portion where the seal member 150 contacts and separates from the float valve 130 is entirely formed on an inclined surface. The center angle α is preferably set to about 120 ° to 150 ° so that a minute protrusion 162 described later is easily crushed to ensure good airtightness and watertightness.

FIG. 3 (b) schematically shows the surface of the float valve contact portion 160, in which micro-projections 162 made of annular ridges having a cross-sectional lip shape and annular groove portions 164 having a cross-sectional lip shape appear alternately. It is formed in a wavy shape. It is preferable that the pitch P ₁ of the minute protrusions 162 is about 30 ≦ P ₁ ≦ 50 μm and the height dimension L ₁ is about 5 ≦ L ₁ ≦ 15 μm. By forming the surface shape of the float valve contact portion 160 in the above-described manner, the microprotrusions 162 are easily crushed when the float valve 130 is pressed with water pressure, thereby ensuring airtightness and watertightness.

Incidentally, the rubber hardness of the sealing member 150, 65 and smaller in _{H S} scale, would be fixed to the float valve contact portion 160 float valve 130 is too soft will bite into the valve port 152, greater than _{H S} 75 Since there is a problem with the sealing performance in the low pressure region, the result that 65 ≦ H _S ≦ 75 is desirable is obtained.

  As shown in FIG. 4, the microprotrusions 162 and the groove portions 164 are alternately formed concentrically. Such minute protrusions 162 and groove portions 164 can be easily formed by cutting a mold for molding the seal member 150.

FIG. 5 is an explanatory view showing the operation of the intake / exhaust valve 100 of the present invention.
FIG. 5A shows a state before water is supplied to the water supply pipe, and air is present inside the intake / exhaust valve 100. In this state, the float valve 130 is placed on the seat 120 of the valve body 110.

FIG. 5B shows a state in which water W ₁ is supplied from the arrow F ₁ side into the water supply / drain port 112, and the float valve 130 floats in the valve chamber 114 of the valve main body 110, The air is exhausted from the intake / exhaust hole 142 of the lid member 140. When the float valve 130 is pressed against the float valve contact portion 160 of the seal member 150 by water pressure, the space between the float valve 130 and the float valve contact portion 160 is sealed, and water in the valve chamber 114 leaks to the intake / exhaust hole 142 side. This is prevented.

FIG. 5C shows a state where water in the water supply pipe is discharged. Water W ₁ in the valve chamber 114 is discharged from the water supply / drain port 112, and the float valve 130 is separated from the float valve contact portion 160 and air is introduced into the valve chamber 114 from the intake / exhaust hole 142. The water in the valve chamber 114 passes through the four drainage grooves 122 provided in the seat 120 and is completely discharged. This action prevents water from remaining in the valve chamber 114 of the intake / exhaust valve 100 and ensures hygiene.

FIG. 5 (d) is a B-B 'sectional view of FIG. 5 (a), the broken line _{R 1} represents a contact circle of the float valve 130 against the seat 120, the float valve 130 and the four culvert 122 It is shown that a drainage channel is formed between the two. The drainage grooves 122 are formed so as to form a cross shape in a plan view formed radially from the water supply / drainage port 112. The drainage groove 122 having such a shape can be easily formed by processing in the horizontal direction with a milling cutter.

  In addition, this invention is not limited to the said embodiment, A various change can be given to the said embodiment in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 100 Air intake / exhaust valve 110 Valve body 112 Water supply / drainage port 114 Valve chamber 116 Male thread part 120 Seat 122 Drainage groove 130 Float valve 140 Cover member 142 Air intake / exhaust hole 144 Screw part 144a Female thread part 144b Male thread part 146 Tool hole 150 Seal member 152 Valve port 160 Float valve contact part 162 Micro protrusion 164 Groove part 170 O-ring

Claims (8)

It is provided in the water supply pipe and exhausts the air in the water supply pipe to the outside during water supply and prevents the water in the water supply pipe from leaking to the outside. When water is drained, the air is sucked into the water supply pipe from the outside. Intake and exhaust valves for draining water,
A valve chamber, a water supply / drain port provided below the valve chamber and communicating with the valve chamber and the water supply pipe, and an intake / exhaust hole provided above the valve chamber and communicating with the valve chamber and opened to the outside air A seal member provided at an upper portion of the valve chamber, formed of an elastic material and communicating with the intake / exhaust hole, and a tapered valve seat formed around the valve port, and vertically in the valve chamber A spherical float valve which is accommodated so as to be displaceable and formed of a material having a specific gravity smaller than that of water, and which opens and closes the valve port by contacting and separating from the valve seat;
An intake / exhaust valve, wherein a minute projection group is formed at a portion of the valve seat where the float valve contacts and separates.   The intake / exhaust valve according to claim 1, wherein a central angle of the valve seat is 120 ° ≦ α ≦ 150 °. The intake / exhaust valve according to claim ₁ , wherein a ratio of a diameter D _{1 of the} float valve to a diameter D _{2 of the} valve port is 0.65 ≦ D ₂ / D ₁ ≦ 0.75.   The intake / exhaust valve according to claim 1, wherein the valve seat is made of rubber, and the rubber hardness Hs is 65 ≦ Hs ≦ 75.   2. The intake / exhaust valve according to claim 1, wherein the minute protrusion group includes a plurality of protrusions formed concentrically around the valve port. The intake / exhaust valve according to claim 5, wherein a height L ₁ of the plurality of protrusions is 5 ≦ L ₁ ≦ 15 μm. The intake / exhaust valve according to claim 6, wherein a pitch P ₁ of the plurality of protrusions is 30 ≦ P ₁ ≦ 50 μm.   6. The intake / exhaust valve according to claim 5, wherein the plurality of protrusions are formed by cutting a mold for forming the seal member.

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