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JP7510666B2 - Positive and negative pressure relief device - Google Patents

Positive and negative pressure relief device Download PDF

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JP7510666B2
JP7510666B2 JP2020087717A JP2020087717A JP7510666B2 JP 7510666 B2 JP7510666 B2 JP 7510666B2 JP 2020087717 A JP2020087717 A JP 2020087717A JP 2020087717 A JP2020087717 A JP 2020087717A JP 7510666 B2 JP7510666 B2 JP 7510666B2
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valve
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negative pressure
valve body
pressure relief
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JP2021181715A (en
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徹 永原
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丸一株式会社
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use

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Description

本発明は、受水槽や汚水槽等の設備機器内部の圧力変動を緩和させる正負圧緩和装置に関するものである。 The present invention relates to a positive/negative pressure mitigation device that reduces pressure fluctuations inside equipment such as water tanks and wastewater tanks.

ビルやマンション等の建物への給水や汚水を貯蔵するための槽として受水槽や汚水槽が知られている。
特許文献１に記載された受水槽は、水／排水が出入りする際の内部圧力を調整するための通気管が設けられている。即ち、受水槽や汚水槽内の水位が上昇した際には内部圧力が高まり正圧となるために排気を行う必要があり、逆に、水位が下降した際には内部圧力が低下して負圧となるために吸気を行う必要がある。ここで、上記通気管は常時開放されていることから、臭気漏れや虫の侵入等の恐れを有している。そこで、平時には閉塞状態となっており、設備機器内部が正圧又は負圧となった際に起動する正負圧緩和装置を取り付けることが検討されている。 2. Description of the Related Art Water receiving tanks and sewage tanks are known as tanks for supplying water to buildings such as offices and condominiums and for storing wastewater.
The water receiving tank described in Patent Document 1 is provided with a vent pipe to adjust the internal pressure when water/wastewater flows in and out. That is, when the water level in the water receiving tank or sewage tank rises, the internal pressure rises and becomes positive, so it is necessary to exhaust air, and conversely, when the water level drops, the internal pressure drops and becomes negative, so it is necessary to take in air. Here, since the vent pipe is always open, there is a risk of odor leakage and insect intrusion. Therefore, it is being considered to install a positive/negative pressure mitigation device that is normally closed and is activated when the inside of the facility equipment becomes positive or negative pressure.

従来から知られている正負圧緩和装置として以下のものが知られている。
特許文献２には、排水トラップの下流に正圧緩和装置と負圧緩和装置が構成されている。排水管内部の管内圧力が正圧になった際には、緩和装置の内部のジャバラ部が収縮し、管内の正圧を緩和し、また、管内圧力が負圧となった際には、負圧緩和装置の吸気弁が作動し、管内の負圧を緩和する。 The following positive and negative pressure relief devices are known in the prior art.
In Patent Document 2, a positive pressure relief device and a negative pressure relief device are configured downstream of a drain trap. When the pressure inside the drain pipe becomes positive, the bellows part inside the relief device contracts to relieve the positive pressure inside the pipe, and when the pressure inside the pipe becomes negative, the intake valve of the negative pressure relief device operates to relieve the negative pressure inside the pipe.

実開平５－６１２５３号公報Japanese Utility Model Application Publication No. 5-61253 特開２００９－５７７８０号公報JP 2009-57780 A

ここで、上記特許文献２に記載された正負圧緩和装置は、上下に動作する正圧緩和装置と負圧緩和装置が横並びとなっているため、装置が大型化してしまうという問題がある。
本発明は上記問題に鑑み、正負圧緩和装置の小型化を課題とする。 Here, the positive and negative pressure relief device described in the above-mentioned Patent Document 2 has a problem in that the device becomes large in size because the positive and negative pressure relief devices that operate vertically are arranged side by side.
In view of the above problems, an object of the present invention is to reduce the size of a positive/negative pressure relief device.

上記課題を解決する為の請求項１に記載の本発明は、
設備機器内外を連通する通気孔と、
前記通気孔の周囲に設けられた弁座と、
前記弁座に当接することで前記通気孔を常時閉塞する弁体と、
を備えた正負圧緩和装置であって、
前記設備機器内部が正圧又は負圧となった際に前記弁体が水平方向にスライドし、前記通気孔を開口し、
前記弁座又は前記弁体の一方は、ガイド部を有し、
前記弁座又は前記弁体の他方は、ガイド受け部を有し、
前記ガイド部は、前記ガイド受け部に案内されることで前記弁体の傾きを防止し、
前記ガイド部又は前記ガイド受け部は直線形状を成し、水平面及び垂直面に対して傾斜する角度に設けられたことを特徴とする正負圧緩和装置である。 In order to solve the above problems, the present invention as set forth in claim 1 provides:
A vent hole that connects the inside and outside of the facility equipment;
A valve seat provided around the vent hole;
a valve body that constantly closes the vent hole by contacting the valve seat ;
A positive/negative pressure relief device comprising:
When the inside of the facility equipment becomes positive or negative pressure, the valve body slides horizontally to open the vent hole ,
One of the valve seat and the valve body has a guide portion,
The other of the valve seat and the valve body has a guide receiving portion,
The guide portion is guided by the guide receiving portion to prevent the valve body from tilting,
The positive/negative pressure alleviation device is characterized in that the guide portion or the guide receiving portion has a linear shape and is provided at an angle inclined with respect to a horizontal plane and a vertical plane .

上記課題を解決する為の請求項２に記載の本発明は、
前記正負圧緩和装置は、
前記設備機器内部が負圧時に作動する吸気弁と、
前記設備機器内部が正圧時に作動する排気弁から成り、
前記吸気弁及び前記排気弁は、水平方向に列設されていることを特徴とする請求項１に記載の正負圧緩和装置である。
尚、「列設」とは弁体の移動方向に沿って吸気弁及び排気弁が並んで配置されていることを示す表現である。これにより、弁体が進退する方向視において複数の弁体が重なるように配置される。
 In order to solve the above problem, the present invention as set forth in claim 2 is
The positive and negative pressure relief device is
An intake valve that operates when the inside of the facility equipment is under negative pressure;
The facility comprises an exhaust valve that operates when the inside of the facility equipment is under positive pressure,
2. The positive/negative pressure alleviation device according to claim 1, wherein the intake valves and the exhaust valves are arranged in a row in a horizontal direction.
In addition, the term "arranged in a row" refers to the fact that the intake valves and exhaust valves are arranged side by side along the direction in which the valve disc moves, so that the valve discs are arranged so that they overlap when viewed in the direction in which the valve disc moves forward and backward.

上記課題を解決する為の請求項３に記載の本発明は、
前記ガイド受け部は、直線状のリブであることを特徴とする請求項１又は請求項２に記載の正負圧緩和装置である。
 In order to solve the above problems, the present invention as set forth in claim 3 is
3. The positive/negative pressure alleviation device according to claim 1 , wherein the guide receiving portion is a linear rib.

上記課題を解決する為の請求項４に記載の本発明は、
前記弁体は、弾性体によって前記弁座に付勢されていることを特徴とする請求項１乃至請求項３のいずれか１つに記載の正負圧緩和装置である。
 In order to solve the above problems, the present invention as set forth in claim 4 provides:
4. The positive/negative pressure relief device according to claim 1 , wherein the valve body is biased against the valve seat by an elastic body.

請求項１、請求項２に記載の正負圧緩和装置は弁体が水平方向に動作し、通気孔を開口するため、上下方向に動作する弁体を取り付けた場合と比較して装置を小型化することができる。
請求項２に記載の正負圧緩和装置は吸気弁と排気弁が列設されて、弁体が進退する方向視において重なるようにいるため、弁体が進退する方向視において重ならないように弁体を配置した場合と比較して装置を小型化することができる。
請求項１、請求項３に記載の正負圧緩和装置は、弁座又は弁体の一方にガイド部、他方に斜設された直線状のガイド受け部を設け、ガイド部がガイド受け部に案内されることで、弁体が倒れなくなり、弁体の傾きを防止する。
請求項４に記載の正負圧緩和装置は弁体が弾性体によって付勢されるため、確実に弁体が弁座に当接し、通気孔を閉塞することができる。 In the positive/negative pressure mitigation device according to claims 1 and 2, the valve body moves horizontally to open the air vent, so the device can be made smaller than when a valve body that moves vertically is installed.
The positive/negative pressure relief device described in claim 2 has intake valves and exhaust valves arranged in a row so that they overlap when viewed in the direction in which the valve bodies move back and forth, thereby making it possible to make the device more compact than in a case in which the valve bodies are arranged so that they do not overlap when viewed in the direction in which they move back and forth.
The positive and negative pressure mitigation device described in claims 1 and 3 has a guide portion on either the valve seat or the valve body, and a linear guide receiver portion arranged at an angle on the other side, and by guiding the guide portion to the guide receiver portion, the valve body does not fall over and tilting of the valve body is prevented.
In the positive/negative pressure mitigation device according to the fourth aspect of the present invention, the valve body is biased by the elastic body, so that the valve body can reliably abut against the valve seat and close the air hole.

実施例１の排気弁、吸気弁の両方が閉塞状態の断面図である。4 is a cross-sectional view of the first embodiment in which both the exhaust valve and the intake valve are closed. FIG. 実施例１の正圧時の断面図である。FIG. 2 is a cross-sectional view of the first embodiment under positive pressure. 実施例１の負圧時の断面図である。FIG. 2 is a cross-sectional view of the first embodiment when negative pressure is applied. 実施例１の正負圧緩和装置の部材構成を示す分解図である。FIG. 2 is an exploded view showing the component configuration of the positive/negative pressure relief device of the first embodiment. (a)取り付け筒に弁本体を取り付けた状態の断面図である。（b）図５（ａ）のＡ矢視図である。5(a) is a cross-sectional view of the valve body attached to the mounting cylinder, and (b) is a view taken along the arrow A in FIG. 5(a). 取り付け筒を示す正面図である。FIG. 弁本体を示す正面図である。FIG. 正負圧緩和装置を設備機器に取り付けた状態の参考図である。FIG. 1 is a reference diagram showing the positive/negative pressure relief device attached to facility equipment.

以下、図面を参照しながら本発明の正負圧緩和装置１を説明する。尚、以下に記載する説明は実施形態の理解を容易にするためのものであり、これによって発明が制限して理解されるものではない。 The positive and negative pressure relief device 1 of the present invention will be described below with reference to the drawings. Note that the following description is provided to facilitate understanding of the embodiment, and is not intended to limit or limit the invention.

実施例１の正負圧緩和装置１は、図１乃至図３に記載の通り、設備機器１００内外への空気が連通する通気部２と、吸気弁４ｂ及び排気弁４ａを備えた取り付け筒３と、取り付け筒３を収納すると共に、設備機器１００等に接続されるケーシング５と、正負圧緩和装置１全体を覆うカバー部６備えている。 As shown in Figs. 1 to 3, the positive and negative pressure relief device 1 of the first embodiment includes a ventilation section 2 through which air communicates with the inside and outside of the equipment 100, a mounting tube 3 equipped with an intake valve 4b and an exhaust valve 4a, a casing 5 that houses the mounting tube 3 and is connected to the equipment 100, etc., and a cover section 6 that covers the entire positive and negative pressure relief device 1.

通気部２は、ケーシング５外周とカバー部６内周の間に設けられており、正負圧緩和装置１の内外に空気を通過させる。 The ventilation section 2 is provided between the outer periphery of the casing 5 and the inner periphery of the cover section 6, and allows air to pass between the inside and outside of the positive and negative pressure relief device 1.

取り付け筒３は、図４乃至図６に記載の通り、下方に凸部分を有する断面視略Ｔ字形状に形成されている部材であり、この凸部分に吸気弁４ｂ及び排気弁４ａとなる逆流防止弁４を列設してなる。尚、「列設」とは後述する弁体４１１の開閉の際の移動方向に沿って吸気弁４ｂ及び排気弁４ａが並んで配置されているという意味であり、吸気弁４ｂ及び排気弁４ａの移動する方向視、吸気弁４ｂ及び排気弁４ａの一部又は全部が重なるように配置されていることによって、正負圧緩和装置１を小型化することが可能となっている。
また、取り付け筒３は上端部外周にケーシング５と嵌合する被嵌合部３１を備えてなる。
逆流防止弁４の内、設備機器１００内が正圧となった際に水平方向にスライドすることで開口し、通気孔３２を通じて設備機器１００内の空気を排気する逆流防止弁４が排気弁４ａであり、設備機器１００内が負圧となった際に水平方向にスライドすることで開口し、通気孔３２を通じて設備機器１００外の空気を設備機器１００内に吸気する逆流防止弁４が吸気弁４ｂである。図１乃至図３においては、図面上右側が排気弁４ａ、左側が吸気弁４ｂである。
本実施例では、逆流防止弁４としては排気弁４ａも吸気弁４ｂも同じ構造であり、設備機器１００内の圧力に対して開口する方向を異なるように設けることで、それぞれ排気弁４ａ及び吸気弁４ｂとして機能するように構成されている。
以下に、排気弁４ａまた吸気弁４ｂとなる逆流防止弁４の構成について説明する。
逆流防止弁４は、通気孔３２と、通気孔３２の周囲に設けられた弁座３４と、該弁座３４を閉塞する弁体４１１を備えた弁本体４１と、から構成される。
取り付け筒３の凸部分において、同心円状に２か所、通気孔３２が設けられている。
通気孔３２の中央には、弁体４１１の弁軸４１２が取り付けられる、貫通部３３１を備えた取り付け部３３を備え、また通気孔３２の周縁には弁体４１１の当接部４１１ａが当接する弁座３４を備えてなる。
取り付け部３３は、取り付け筒３に水平方向に列設され、弁軸４１２が貫通する円形の貫通部３３１と、貫通部３３１から通気孔３２の内周面にかけて斜設された４つの直線状のガイド受け部３３２を備えてなる。尚、ここで、「斜設された直線状のガイド受け部３３２」とは、施工完了時、直線形状を成すガイド受け部３３２が設けられた方向が、図５（b）及び図６のように、水平面また垂直面に対して傾斜した角度に設けられている、という意味である。
ガイド受け部３３２は弁座３４から取り付け部３３にかけて斜設された直線状のリブであり、取り付け部３３を通気孔３２上に支持している。
弁座３４は、弁体４１１の当接部４１１ａが当接することで通気孔３２を閉塞する通気孔３２の周縁に設けられた箇所であり、排気弁４ａ側の弁座３４は取り付け筒３の凸部分の内側に、吸気孔４ｂ側の弁座３４は取り付け筒３の凸部分の外側に、それぞれ設けられてなる。
弁本体４１は、硬質素材から構成され、通気孔３２を閉口する円盤状の弁体４１１と、弁体４１１から垂直方向に突出する弁軸４１２と、弁軸４１２を覆うキャップ部材４１３とを有している。また、弁体４１１を弁座３４に向けて付勢する弾性体４１４（本実施例ではスプリング）を備えてなる。
弁体４１１は、その外周に、取り付け筒３の弁座３４と当接する、ゴムなどの弾性体からなる当接部４１１ａと、弁軸４１２が形成された面に、弁軸４１２を中心として、ガイド受け部３３２と合致するリブ片からなる直線状のガイド部４１１ｂを備えてなる。
弁軸４１２は弁体４１１の中央から垂直に突出している軸体であり、端部に溝部４１２ａを設け、該溝部４１２ａは、後述するキャップ部材４１３の爪部４１３ａと嵌合する。
弾性体４１４は弾性力によって弁体４１１を付勢するスプリングであって、弁体４１１が弁座３４に当接する方向に付勢することで、通気孔３２を閉塞し、逆流防止弁４の開口時には弾性体４１４が圧縮し、通気孔３２が開口する。
キャップ部材４１３は円筒状の部材であり、爪部４１３ａを有し、当該爪部４１３ａが弁軸４１２の溝部４１２ａと嵌合されることで、弁本体４１が取り付け部３３から抜けることを防止すると共に、弾性体４１４を取り付け部３３と弁本体４１との間で作用させる部材である。
ケーシング５は円筒状の部材であり、外周にカバー部６を固定するための固定部５１を備え、また内側面に取り付け筒３の被嵌合部３１と嵌合する嵌合部５２を備え、下方には設備機器１００と接続するための接続部５３を設けてなる。
カバー部６は正負圧緩和装置１の上方を覆う部材であり、被固定部５１を備え、ケーシング５の外周の固定部５１に固定されている。
カバー部６がケーシング５に固定されることで、カバー部６とケーシング５の間に通気部２が形成される。 4 to 6, the mounting cylinder 3 is a member formed in a generally T-shaped cross section with a convex portion on the lower side, and the check valves 4 serving as the intake valves 4b and the exhaust valves 4a are arranged in a row on this convex portion. Note that "arranged in a row" means that the intake valves 4b and the exhaust valves 4a are arranged side by side along the movement direction of the valve body 411 described later when opening and closing, and by arranging the intake valves 4b and the exhaust valves 4a so that they partially or entirely overlap when viewed in the direction in which the intake valves 4b and the exhaust valves 4a move, it is possible to reduce the size of the positive/negative pressure relaxation device 1.
The mounting cylinder 3 also has a fitted portion 31 on the outer periphery of the upper end portion, into which the casing 5 is fitted.
Of the check valves 4, the check valve 4 that opens by sliding horizontally when the inside of the equipment 100 becomes positive pressure and exhausts the air inside the equipment 100 through the air vent 32 is the exhaust valve 4a, and the check valve 4 that opens by sliding horizontally when the inside of the equipment 100 becomes negative pressure and intakes the air outside the equipment 100 into the equipment 100 through the air vent 32 is the intake valve 4b. In Figures 1 to 3, the exhaust valve 4a is on the right side of the drawings and the intake valve 4b is on the left side.
In this embodiment, the check valve 4 has the same structure as the exhaust valve 4a and the intake valve 4b, and is configured to function as the exhaust valve 4a and the intake valve 4b by setting the opening directions to be different in relation to the pressure inside the equipment 100.
The structure of the check valve 4, which serves as the exhaust valve 4a or the intake valve 4b, will be described below.
The check valve 4 is composed of an air vent 32 , a valve seat 34 provided around the air vent 32 , and a valve body 41 equipped with a valve element 411 that closes the valve seat 34 .
The mounting tube 3 has two concentric air holes 32 formed in the protruding portion.
The center of the vent hole 32 is provided with a mounting portion 33 having a through portion 331 to which the valve shaft 412 of the valve body 411 is attached, and the periphery of the vent hole 32 is provided with a valve seat 34 against which the abutment portion 411a of the valve body 411 abuts.
The mounting parts 33 are arranged in a row horizontally on the mounting tube 3, and include circular through-holes 331 through which the valve shaft 412 passes, and four linear guide receiving parts 332 obliquely arranged from the through-holes 331 to the inner peripheral surface of the air hole 32. Note that the "obliquely arranged linear guide receiving parts 332" here means that when construction is completed, the direction in which the linear guide receiving parts 332 are arranged is at an angle inclined with respect to the horizontal or vertical plane, as shown in Figures 5(b) and 6.
The guide receiving portion 332 is a linear rib obliquely provided from the valve seat 34 to the mounting portion 33 , and supports the mounting portion 33 above the air hole 32 .
The valve seat 34 is a portion provided on the periphery of the air hole 32 that closes the air hole 32 when the abutment portion 411a of the valve body 411 abuts against it. The valve seat 34 on the exhaust valve 4a side is provided on the inside of the convex portion of the mounting tube 3, and the valve seat 34 on the intake hole 4b side is provided on the outside of the convex portion of the mounting tube 3.
The valve body 41 is made of a hard material and has a disk-shaped valve element 411 that closes the air hole 32, a valve stem 412 that protrudes vertically from the valve element 411, and a cap member 413 that covers the valve stem 412. The valve body 41 also includes an elastic body 414 (a spring in this embodiment) that biases the valve element 411 toward the valve seat 34.
The valve body 411 has on its outer periphery a contact portion 411a made of an elastic material such as rubber which abuts against the valve seat 34 of the mounting tube 3, and on the surface on which the valve shaft 412 is formed, a linear guide portion 411b made of a rib piece which matches the guide receiving portion 332 with the valve shaft 412 as the center.
The valve shaft 412 is a shaft body that protrudes vertically from the center of the valve body 411, and has a groove portion 412a at its end, which fits into a claw portion 413a of a cap member 413, which will be described later.
The elastic body 414 is a spring that biases the valve body 411 by elastic force, and biases the valve body 411 in the direction in which it abuts against the valve seat 34, thereby blocking the air vent 32. When the check valve 4 is opened, the elastic body 414 is compressed, and the air vent 32 opens.
The cap member 413 is a cylindrical member having a claw portion 413a which fits into a groove portion 412a of the valve shaft 412 to prevent the valve body 41 from coming off the mounting portion 33 and to allow the elastic body 414 to act between the mounting portion 33 and the valve body 41.
The casing 5 is a cylindrical member and has a fixing portion 51 for fixing the cover portion 6 to its outer periphery, a fitting portion 52 on its inner surface that fits into the fitting portion 31 of the mounting tube 3, and a connection portion 53 on the lower side for connecting to the facility equipment 100.
The cover portion 6 is a member that covers the upper part of the positive/negative pressure relief device 1 , and has a fixed portion 51 and is fixed to the fixing portion 51 on the outer periphery of the casing 5 .
When the cover portion 6 is fixed to the casing 5 , a ventilation portion 2 is formed between the cover portion 6 and the casing 5 .

正負圧緩和装置の施工方法について説明する。
最初に、取り付け筒３に弁本体４１を取り付けることで、排気弁４ａまた吸気弁４ｂとなる逆流防止弁４を構成する方法を説明する。尚、弁本体４１の取付方法は、特に分けて記載しない場合、排気弁４ａ側、吸気弁４ｂ側とも同様である。
まず、当接部４１１ａを取り付けた弁本体４１の弁軸４１２を、取り付け部３３の貫通部３３１に挿通する。
この時、弁体４１１に設けたガイド部４１１ｂを、取り付け筒３の弁座３４に設けたガイド受け部３３２に案内されるように配置する。
弁本体４１の弁軸４１２の周囲に弾性体４１４を取り付け、弁軸４１２の溝部４１２ａにキャップ部材４１３の爪部４１３ａを嵌合することで、弁本体４１が取り付け部３３から抜脱しないようにすると共に、弁本体４１と取り付け部３３の間に弾性体４１４が作用し、弁体４１１が弁座３４側に付勢するようにすることで、逆流防止弁４が構成される。
上記の作業を、排気弁４ａ側、吸気弁４ｂ側ともに行い、排気弁４ａ、及び吸気弁４ｂを構成する。
次に、取り付け筒３の嵌合部５２とケーシング５の被嵌合部３１を嵌合させ、取り付け筒３をケーシング５に接続する。
次に、ケーシング５の外周の固定部５１に、カバー部６の被固定部５１を固定し、更にケーシング５の接続部５３と設備機器１００を接続することで正負圧緩和装置１の設備機器１００への施工が完了する。 The method of installing the positive and negative pressure relief device will be described.
First, a method for constructing the check valve 4 which serves as the exhaust valve 4a or the intake valve 4b will be described by attaching the valve body 41 to the mounting cylinder 3. The method for attaching the valve body 41 is the same for both the exhaust valve 4a side and the intake valve 4b side unless otherwise specified.
First, the valve shaft 412 of the valve body 41 to which the abutment portion 411 a is attached is inserted into the through-hole 331 of the attachment portion 33 .
At this time, the guide portion 411 b provided on the valve body 411 is arranged so as to be guided by the guide receiving portion 332 provided on the valve seat 34 of the mounting cylinder 3 .
An elastic body 414 is attached around the valve shaft 412 of the valve body 41 and the claw portion 413a of the cap member 413 is fitted into the groove portion 412a of the valve shaft 412 to prevent the valve body 41 from coming off the mounting portion 33, and the elastic body 414 acts between the valve body 41 and the mounting portion 33 to urge the valve body 411 toward the valve seat 34, thereby forming a check valve 4.
The above-mentioned work is carried out on both the exhaust valve 4a side and the intake valve 4b side to complete the exhaust valve 4a and the intake valve 4b.
Next, the fitting portion 52 of the mounting tube 3 is fitted into the fitted portion 31 of the casing 5 , and the mounting tube 3 is connected to the casing 5 .
Next, the fixed portion 51 of the cover portion 6 is fixed to the fixing portion 51 on the outer periphery of the casing 5, and then the connection portion 53 of the casing 5 is connected to the equipment 100, thereby completing the installation of the positive/negative pressure relief device 1 to the equipment 100.

正負圧緩和装置の動作について説明する。まず、平常時において吸気弁４ｂ及び排気弁４ａの弁体４１１は弾性体４１４によって弁座３４当接することで、図１のように、通気孔３２が閉塞されている。
ここで、設備機器１００内部の水位が上昇する等して、外部に比べて設備機器１００内部の圧力が高くなると、設備機器１００に接続されたケーシング５内が正圧となり、排気弁４ａの弁本体４１が正圧によって開弁方向に圧力を受け、排気弁４ａに備えた弾性体４１４が圧力により圧縮することで、排気弁４ａ側の弁体４１１の当接部４１１ａが弁座３４から離間し、図２のように、弁体４１１が水平方向にスライドすることで通気孔３２を開口し、設備機器１００内部の空気を排気する。排気により設備機器１００内の圧力が低下すると排気弁４ａの弁体４１１に作用する圧力の応力が下がり、弾性体４１４が伸張することで弁体４１１の当接部４１１ａが取り付け筒３の弁座３４に当接し、排気弁４ａ側の通気孔３２を閉塞する。
また、設備機器１００内部の水位が下降する等して、外部に比べて設備機器１００内部の圧力が低くなると、設備機器１００に接続されたケーシング５内が負圧となり、吸気弁４ｂの弁本体４１が負圧によって開弁方向に圧力を受け、吸気弁４ｂに備えた弾性体４１４が圧力により圧縮することで、吸気弁４ｂ側の弁体４１１の当接部４１１ａが弁座３４から離間し、図３のように、弁体４１１が水平方向にスライドすることで通気孔３２を開口し、設備機器１００外部の空気を吸気する。吸気により設備機器１００内の圧力が上昇すると吸気弁４ｂの弁体４１１に作用する圧力の応力が下がり、弾性体４１４が伸張することで弁体４１１の当接部４１１ａが取り付け筒３の弁座３４に当接し、吸気弁４ｂ側の通気孔３２を閉塞する。 The operation of the positive/negative pressure relief device will now be described. First, in normal operation, the valve bodies 411 of the intake valve 4b and the exhaust valve 4a are in contact with the valve seats 34 by the elastic bodies 414, thereby blocking the air holes 32 as shown in FIG.
Here, when the water level inside the equipment 100 rises, etc., and the pressure inside the equipment 100 becomes higher than the outside, the inside of the casing 5 connected to the equipment 100 becomes positive pressure, the valve body 41 of the exhaust valve 4a is pressured in the valve opening direction by the positive pressure, and the elastic body 414 provided in the exhaust valve 4a is compressed by the pressure, so that the abutment portion 411a of the valve body 411 on the exhaust valve 4a side moves away from the valve seat 34, and as shown in Fig. 2, the valve body 411 slides horizontally to open the vent hole 32 and exhaust the air inside the equipment 100. When the pressure inside the equipment 100 decreases due to exhaust, the pressure stress acting on the valve body 411 of the exhaust valve 4a decreases, and the elastic body 414 expands, so that the abutment portion 411a of the valve body 411 abuts against the valve seat 34 of the mounting tube 3, closing the vent hole 32 on the exhaust valve 4a side.
In addition, when the water level inside the equipment 100 drops, etc., and the pressure inside the equipment 100 becomes lower than the outside, the inside of the casing 5 connected to the equipment 100 becomes negative pressure, the valve body 41 of the intake valve 4b is pressured in the valve opening direction by the negative pressure, and the elastic body 414 provided on the intake valve 4b is compressed by the pressure, so that the abutment portion 411a of the valve body 411 on the intake valve 4b side moves away from the valve seat 34, and the valve body 411 slides horizontally as shown in Fig. 3 to open the vent hole 32 and intake air from outside the equipment 100. When the pressure inside the equipment 100 rises due to intake, the pressure stress acting on the valve body 411 of the intake valve 4b decreases, and the elastic body 414 expands, so that the abutment portion 411a of the valve body 411 abuts against the valve seat 34 of the mounting cylinder 3, closing the vent hole 32 on the intake valve 4b side.

これら排気弁４ａ及び吸気弁４ｂの動作において、弁軸４１２側に比べ弁体４１１側は重いので、弁本体４１が水平方向に動作する際に、弁体４１１側が下方に傾くように重力が作用する。
しかし、この時、弁体４１１に設けたガイド部４１１ｂが弁座３４に設けたガイド受け部３３２に案内されており、弁本体４１が、弁体４１１側が下方となるように傾くことを防止している。
特に本実施例では、ガイド受け部３３２を斜設し、ガイド部４１１ｂをガイド受け部３３２に合致するように構成している。
重力の作用する方向は直下方向であり、弁本体４１には弁体４１１が直下方向に向かうように重力が作用する。この時、直線状のガイド部４１１ｂ及びガイド受け部３３２が、直下方向に沿って設けられていると、ガイド部４１１ｂ及びガイド受け部３３２を設けていても、弁本体４１の傾く方向とガイド部４１１ｂ及びガイド受け部３３２の方向が同じ直下方向であるため、弁本体４１の弁体４１１が下方に傾いてしまう場合があるが、本実施例ではガイド部４１１ｂ及びガイド受け部３３２を斜設しているため、弁本体４１の傾く方向とガイド部４１１ｂ及びガイド受け部３３２の方向が異なっており、弁本体４１が傾くことを防止している。
尚、上記実施例は一例として記載したものであって、ガイド受け部３３２又はガイド部４１１ｂは弁体４１１又は弁座３４のどちらに形成されてもよい。 In the operation of the exhaust valve 4a and the intake valve 4b, the valve body 411 side is heavier than the valve shaft 412 side, so that when the valve body 41 moves horizontally, gravity acts to tilt the valve body 411 side downward.
At this time, however, the guide portion 411b provided on the valve body 411 is guided by the guide receiving portion 332 provided on the valve seat 34, preventing the valve body 41 from tilting so that the valve body 411 side faces downward.
Particularly in this embodiment, the guide receiving portion 332 is obliquely provided, and the guide portion 411 b is configured to match the guide receiving portion 332 .
Gravity acts in the vertically downward direction, and gravity acts on the valve body 41 so that the valve element 411 faces the vertically downward direction. At this time, if the linear guide portion 411b and guide receiving portion 332 are provided along the vertically downward direction, the valve element 411 of the valve body 41 may tilt downward even if the guide portion 411b and guide receiving portion 332 are provided, because the direction in which the valve body 41 tilts and the direction of the guide portion 411b and guide receiving portion 332 are the same, vertically downward direction. However, in this embodiment, the guide portion 411b and guide receiving portion 332 are obliquely provided, so the direction in which the valve body 41 tilts and the direction of the guide portion 411b and guide receiving portion 332 are different, and the valve body 41 is prevented from tilting.
Incidentally, the above embodiment is described as one example, and the guide receiving portion 332 or the guide portion 411 b may be formed on either the valve body 411 or the valve seat 34 .

本発明の正負圧緩和装置１によれば、吸気弁４ｂと排気弁４ａの弁本体４１を水平方向に列設することで、正負圧緩和装置を小型化することができ、吸気弁４ｂ及び排気弁４ａの弁体４１１に設けたガイド部４１１ｂが、取り付け筒３に設けたガイド受け部３３２にガイドされるという構成によって、弁体４１１が倒れず、弁体４１１が弁座３４に当接するという作用効果を奏することができる。 According to the positive/negative pressure relief device 1 of the present invention, the valve bodies 41 of the intake valve 4b and exhaust valve 4a are arranged in a horizontal row, making it possible to miniaturize the positive/negative pressure relief device, and the guide portion 411b provided on the valve body 411 of the intake valve 4b and exhaust valve 4a is guided by the guide receiving portion 332 provided on the mounting tube 3, which provides the effect of preventing the valve body 411 from falling over and contacting the valve seat 34.

本発明の正負圧緩和装置１は以上であるが、発明の要旨を逸脱しない範囲において種々の変更を加えても良い。例えば、その他の実施例として通気孔３２を常時閉塞している吸気弁４ｂと排気弁４ａの弁本体４１が垂直方向にスライドし、垂直方向から見た時、通気孔３２の開口が、一部又は全部重なるように並んで配置することで正負圧緩和装置１を小型化する構成としてもよい。 The positive and negative pressure relief device 1 of the present invention has been described above, but various modifications may be made without departing from the gist of the invention. For example, in another embodiment, the valve body 41 of the intake valve 4b and exhaust valve 4a, which constantly close the air vent 32, may slide vertically, and the openings of the air vent 32 may be arranged so that they overlap partially or completely when viewed vertically, thereby making the positive and negative pressure relief device 1 smaller.

１ 正負圧緩和装置
２ 通気部
３ 取り付け筒
３１ 被嵌合部
３２ 通気孔
３３ 取り付け部
３３１ 貫通部
３３２ ガイド受け部
３４ 弁座
４ 逆流防止弁
４ａ 排気弁
４ｂ 吸気弁
４１ 弁本体
４１１ 弁体
４１１ａ 当接部
４１１ｂ ガイド部
４１２ 弁軸
４１２ａ 溝部
４１３ キャップ部材
４１３ａ 爪部
４１４ 弾性体
５ ケーシング
５１ 固定部
５２ 嵌合部
５３ 接続部
６ カバー部
６１ 被固定部
１００ 設備機器 Reference Signs List 1 Positive/negative pressure relief device 2 Ventilating portion 3 Mounting tube 31 Fitted portion 32 Vent hole 33 Mounting portion 331 Penetration portion 332 Guide receiving portion 34 Valve seat 4 Check valve 4a Exhaust valve 4b Intake valve 41 Valve body 411 Valve element 411a Abutment portion 411b Guide portion 412 Valve shaft 412a Groove portion 413 Cap member 413a Claw portion 414 Elastic body 5 Casing 51 Fixing portion 52 Fitting portion 53 Connection portion 6 Cover portion 61 Fixed portion 100 Facility equipment

Claims (4)

設備機器内外を連通する通気孔と、
前記通気孔の周囲に設けられた弁座と、
前記弁座に当接することで前記通気孔を常時閉塞する弁体と、
を備えた正負圧緩和装置であって、
前記設備機器内部が正圧又は負圧となった際に前記弁体が水平方向にスライドし、前記通気孔を開口し、
前記弁座又は前記弁体の一方は、ガイド部を有し、
前記弁座又は前記弁体の他方は、ガイド受け部を有し、
前記ガイド部は、前記ガイド受け部に案内されることで前記弁体の傾きを防止し、
前記ガイド部又は前記ガイド受け部は直線形状を成し、水平面及び垂直面に対して傾斜する角度に設けられたことを特徴とする正負圧緩和装置。 A vent hole that connects the inside and outside of the facility equipment;
A valve seat provided around the vent hole;
a valve body that constantly closes the vent hole by contacting the valve seat ;
A positive/negative pressure relief device comprising:
When the inside of the facility equipment becomes positive or negative pressure, the valve body slides horizontally to open the vent hole ,
One of the valve seat and the valve body has a guide portion,
The other of the valve seat and the valve body has a guide receiving portion,
The guide portion is guided by the guide receiving portion to prevent the valve body from tilting,
The positive/negative pressure alleviation device, wherein the guide portion or the guide receiving portion has a linear shape and is provided at an angle inclined with respect to a horizontal plane and a vertical plane. 前記正負圧緩和装置は、
前記設備機器内部が負圧時に作動する吸気弁と、
前記設備機器内部が正圧時に作動する排気弁から成り、
前記吸気弁及び前記排気弁は、水平方向に列設されていることを特徴とする請求項１に記載の正負圧緩和装置。 The positive and negative pressure relief device is
An intake valve that operates when the inside of the facility equipment is under negative pressure;
The facility comprises an exhaust valve that operates when the inside of the facility equipment is under positive pressure,
2. The positive/negative pressure alleviation device according to claim 1, wherein the intake valves and the exhaust valves are arranged in a horizontal row. 前記ガイド受け部は、直線状のリブであることを特徴とする請求項１又は請求項２に記載の正負圧緩和装置。 3. The positive /negative pressure alleviation device according to claim 1 , wherein the guide receiving portion is a linear rib. 前記弁体は、弾性体によって前記弁座に付勢されていることを特徴とする請求項１乃至請求項３のいずれか１つに記載の正負圧緩和装置。 4. The positive/negative pressure relief device according to claim 1, wherein the valve body is biased against the valve seat by an elastic body.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008296979A (en) 2007-05-31 2008-12-11 Tokiko Techno Kk Vent pipe arrangement of underground tank
JP2015021466A (en) 2013-07-22 2015-02-02 株式会社パイオラックス Valve device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008296979A (en) 2007-05-31 2008-12-11 Tokiko Techno Kk Vent pipe arrangement of underground tank
JP2015021466A (en) 2013-07-22 2015-02-02 株式会社パイオラックス Valve device

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