JPS597079B2 - float type trap - Google Patents

Description

【発明の詳細な説明】 本発明はフロート式トラップに関する。[Detailed description of the invention] The present invention relates to float traps.

従来、フロート式トラップに於ける開弁力は、弁口面積
と入口、出口の差圧とから決定される。Conventionally, the valve opening force in a float type trap is determined from the valve opening area and the differential pressure between the inlet and the outlet.

また、製作可能なフロートの大きさには限界があるので
、大きな弁口面積を開弁ずる為には、フロートに作用す
る浮力を拡大するレバー機構等、あるいは複座式やパイ
ロット式の弁機構等の複雑な構造を要する。In addition, there is a limit to the size of floats that can be manufactured, so in order to open a valve with a large valve opening area, a lever mechanism that increases the buoyant force acting on the float, or a two-seat type or pilot type valve mechanism is required. Requires a complex structure such as

本発明は上記事情に鑑み、簡単な構造で大きな弁口面積
を開弁できるフロート式トラップの提供を目的とする。In view of the above circumstances, it is an object of the present invention to provide a float-type trap that has a simple structure and can open a valve with a large valve opening area.

上記目的は、入口及び弁口を通して出口が連通ずる復水
溜り室を設け、該復水溜り室内にフロートを配し、該フ
ロートの変位によって弁口を開閉せしめるフロート式ト
ラップに於いて、出口側に背圧調節弁を配し弁口に連通
した背圧室を形成し、該背圧室を絞った状態で復水溜り
室と連通せしめて成るフロート式トラップによって達成
できる。The above purpose is to provide a condensate reservoir chamber with an inlet and an outlet communicating through a valve port, a float placed in the condensate reservoir chamber, and a float trap that opens and closes the valve port by displacement of the float. This can be achieved by a float-type trap in which a back-pressure regulating valve is disposed in the back-pressure chamber to form a back-pressure chamber communicating with the valve port, and the back-pressure chamber is communicated with the condensate reservoir chamber in a throttled state.

上記構造の特徴とするところは、出口側に背圧調節弁を
配することにより、開弁に要する力を、弁口面積と、入
口背圧室との差圧とから決定されるようにしたところで
ある。The feature of the above structure is that by placing a back pressure regulating valve on the outlet side, the force required to open the valve is determined from the valve opening area and the differential pressure with the inlet back pressure chamber. By the way.

ここに於いて本発明の対象とするフロート式トラップは
、流体の比重差に基づく浮力によって開閉作用を行うも
のであり、開放フロートあるいは密閉フロートを用いた
ものを問わず、またレバー機構や単座弁、複座弁、パイ
ロット弁等の弁機構を用いたものであっても良い。The float-type trap that is the subject of the present invention is one that opens and closes using buoyancy based on the difference in specific gravity of the fluid, and can be used regardless of whether it uses an open float or a closed float, or whether it uses a lever mechanism or a single-seat valve. , a two-seat valve, a pilot valve, or other valve mechanism may be used.

また、背圧調節弁としては、下記実施例の如く弾性体の
弾性力に基づくものの外、絞り弁等の開弁面積を調節し
て背圧を調節するものがある。In addition to back pressure control valves that are based on the elastic force of an elastic body as in the embodiments below, there are also back pressure control valves that adjust the back pressure by adjusting the opening area of a throttle valve or the like.

更に、上記背圧調節弁は、トラップ筐体内に内装するも
のと、トラップと別に構成し、該トラップの出口側に取
付けるものとがある。Furthermore, the above-mentioned back pressure regulating valve may be built inside the trap housing, or may be constructed separately from the trap and attached to the outlet side of the trap.

更にまた、復水溜り室と背圧室とを絞った状態で連通ず
る手段としては、下記実施例の如く固定オリフイスによ
っても、あるいは可変オリフイスまたは弁座にスリット
を設けるもの、弁座と弁体とのシール面を荒上げし流体
を漏洩させるようにしたものでも良い。Furthermore, as a means for communicating the condensate reservoir chamber and the back pressure chamber in a constricted state, it is possible to use a fixed orifice as shown in the embodiment below, a variable orifice, a method in which a slit is provided in the valve seat, or a method in which the valve seat and the valve body are provided with a slit. The sealing surface may be roughened to allow fluid to leak.

以下、図示の実施例に基づいて説明する。The following description will be made based on the illustrated embodiment.

第１図に於いては、１は本体で、上蓋ボルト、ナット等
の締付手段（図示せず）によって固着し、筐体を形成す
る。In FIG. 1, reference numeral 1 denotes a main body, which is secured by tightening means (not shown) such as upper lid bolts and nuts to form a casing.

３はガスケットである。４は上記筐体内に形成された復
水溜り室で、入口５が連通ずる。3 is a gasket. Reference numeral 4 denotes a condensate reservoir chamber formed within the housing, with which an inlet 5 communicates.

６は入口５と復水溜り室との間に設けられた隔壁で、流
入した復水の衝撃力が復水溜り室４内に直接作用するこ
とを防ぐ。Reference numeral 6 denotes a partition wall provided between the inlet 5 and the condensate reservoir chamber, which prevents the impact force of the inflowing condensate from acting directly on the inside of the condensate reservoir chamber 4.

７は気孔である。7 is a pore.

８は背圧室で、弁口９を通して復水溜り室４に連通し、
背圧調節弁１０によって出口１１より分離される。8 is a back pressure chamber, which communicates with the condensate reservoir chamber 4 through a valve port 9;
It is separated from the outlet 11 by a back pressure regulating valve 10.

１２は弁口を形成する弁座で、１３は復水溜り室４と背
圧室８とを絞った状態で連通ずるオリフイスである。12 is a valve seat forming a valve port, and 13 is an orifice that communicates with the condensate reservoir chamber 4 and the back pressure chamber 8 in a throttled state.

上記背圧調節弁は筐体内に内装され、弁座部１４と、該
弁座部１４に出口１１側から対向した弁体１５と該弁体
１５を弁座部１４方向に付勢するバネ１６と、バネ受け
と、外部からの螺子操作によってバネ１６の弾性力を調
節するスピンドル１Ｔとから成る。The back pressure regulating valve is housed inside a housing, and includes a valve seat 14, a valve body 15 facing the valve seat 14 from the outlet 11 side, and a spring 16 that urges the valve body 15 toward the valve seat 14. , a spring receiver, and a spindle 1T that adjusts the elastic force of the spring 16 by external screw operation.

１８は復水溜り室４内に自由状態で配された球形フロー
トで、復水溜り室４内の液位に伴って浮上、降下し、弁
口９を直接開閉する。Reference numeral 18 denotes a spherical float placed freely in the condensate reservoir chamber 4, which floats and descends in accordance with the liquid level within the condensate reservoir chamber 4, and directly opens and closes the valve port 9.

１９はフロート１８の降下止めのフロート座である。19 is a float seat that stops the float 18 from falling.

上記実施例のフロート式トラップに於いて、先ず背圧調
節弁１０のバネ１６の弾性力を調節し、背圧室８内が所
定以上の圧力になったときのみ開弁ずるよう設定する。In the float type trap of the above embodiment, first, the elastic force of the spring 16 of the back pressure regulating valve 10 is adjusted so that the valve opens only when the pressure inside the back pressure chamber 8 reaches a predetermined level or higher.

また、弁口９の面積は、背圧室８の圧力が上昇し所定の
差圧が生じたときに開弁されるよう大きな弁口面積に設
定する。Further, the area of the valve port 9 is set to be large enough to open when the pressure in the back pressure chamber 8 increases and a predetermined pressure difference occurs.

更に、オリフイス１３から背圧室８内に排出される排出
量は、復水流人量の下限以下に設定され、該オリフイス
から蒸気等の気体が放出されることを防ぐ。Further, the discharge amount discharged from the orifice 13 into the back pressure chamber 8 is set below the lower limit of the flow rate of condensate, thereby preventing gases such as steam from being discharged from the orifice.

以下、上記実施例の作用を説明する。The operation of the above embodiment will be explained below.

入口５から流入する復水が少なく、且つ背圧室８の圧力
が低圧の場合、フロート１８は実線で示す如く弁座１２
に吸着され、閉弁状態にある。When the amount of condensate flowing in from the inlet 5 is small and the pressure in the back pressure chamber 8 is low, the float 18 moves toward the valve seat 12 as shown by the solid line.
The valve is in a closed state.

入口５から引き続き復水が流入し、復水溜り室４内の液
位が上昇し、且つオリフイス１３から排出される復水に
より背圧室８内の圧力は次第に昇圧する。Condensate continues to flow in from the inlet 5, the liquid level in the condensate reservoir chamber 4 rises, and the pressure in the back pressure chamber 8 gradually increases due to the condensate discharged from the orifice 13.

背圧室８の圧力が高まり、入口５側圧力との差圧が所定
以下になると、フロート１８は該フロート１８に作用す
る浮力により弁座１２から離座し、図中二点鎖線で示す
如く浮上して弁口９を開く。When the pressure in the back pressure chamber 8 increases and the differential pressure with the inlet 5 side pressure becomes less than a predetermined value, the float 18 is separated from the valve seat 12 due to the buoyant force acting on the float 18, as shown by the two-dot chain line in the figure. It floats up and opens the valve port 9.

弁口９が開られると、背圧室８の圧力は瞬間的に更に昇
圧され、背圧調節弁１０はこの圧力上昇によってバネ１
６の弾力に抗して開弁され、出口１１側へ復水を排出し
て行く。When the valve port 9 is opened, the pressure in the back pressure chamber 8 is further increased instantaneously, and the back pressure regulating valve 10 is activated by the spring 1 due to this pressure increase.
The valve is opened against the elastic force of 6, and the condensate is discharged to the outlet 11 side.

弁口９の開弁により復水溜り室４内に流入した復水が排
出され、復水溜り室４内の液位が低下すると、フロート
１８は降下し弁座９に吸着され弁口９を閉じる。When the condensate that has flowed into the condensate reservoir chamber 4 is discharged by opening the valve port 9 and the liquid level in the condensate reservoir chamber 4 decreases, the float 18 descends and is attracted to the valve seat 9 and closes the valve port 9. close.

背圧室８の圧力は、弁口９の閉弁に伴い低下し背圧調節
弁１０の開弁設定圧力以下になると再び閉弁し、作動前
の状態に戻る。The pressure in the back pressure chamber 8 decreases as the valve port 9 closes, and when it becomes equal to or less than the opening set pressure of the back pressure regulating valve 10, the pressure in the back pressure chamber 8 is closed again, returning to the state before operation.

以下、同様の作用を繰り返す。Thereafter, the same action is repeated.

ここに於いて、本実施例では弁口９を開くに必要な力が
、弁口面積と、入口５と背圧室８圧力との差圧から決定
されるので、従来の弁口面積と、入口、出口の差圧とか
ら開弁力が決定されるものに比べ大きな弁口面積を複雑
な機構を用いなくても容易に開弁でき、多量の復水を排
出できる。Here, in this embodiment, the force required to open the valve port 9 is determined from the valve port area and the differential pressure between the inlet 5 and the back pressure chamber 8 pressure, so the conventional valve port area and Compared to a valve whose opening force is determined from the pressure difference between the inlet and the outlet, the valve can be easily opened with a large valve opening area without using a complicated mechanism, and a large amount of condensate can be discharged.

第２図は他の実施例を示し、その特徴とするところは、
背圧調節弁をトラップと別に構成し、トラップの出口側
に取付けるようにしたところである。FIG. 2 shows another embodiment, and its features are as follows:
The back pressure control valve is constructed separately from the trap and is attached to the outlet side of the trap.

また、上記第１図の実施例と同様な作用を行う。Further, it performs the same function as the embodiment shown in FIG. 1 above.

２１は本体、２２は上蓋、２３はガスケット、２４は復
水溜り室、２５は入口、２６は隔壁、２７は気孔、２８
は出口３１に背圧調節弁３０が取付けられることにより
背圧室となる出口通路、２９は弁口、３２は弁座、３３
はオリフイス、３４はフロートである。21 is the main body, 22 is the upper lid, 23 is the gasket, 24 is the condensate storage chamber, 25 is the inlet, 26 is the partition wall, 27 is the air hole, 28
29 is a valve port, 32 is a valve seat, and 33
is an orifice, and 34 is a float.

また、第３，４図は上記実施例に取付けられる背圧調節
弁３０の一例を示す。Moreover, FIGS. 3 and 4 show an example of the back pressure regulating valve 30 attached to the above embodiment.

第３図に於いて、４１はバルブ筐体、４２は入口４３、
出口４４を分離する隔壁、４５は弁口、４６は弁体、４
７はバネ、４８はバネ受け、４９はスピンドルである。In Fig. 3, 41 is the valve housing, 42 is the inlet 43,
A partition separating the outlet 44, 45 a valve port, 46 a valve body, 4
7 is a spring, 48 is a spring receiver, and 49 is a spindle.

第４図に於いて、５１はバルブ筐体、５２は入口、５３
は弁座、５４は弁体、５５はバネ、５６はリブ、５７は
バネ受け、５８は出口である。In Fig. 4, 51 is the valve housing, 52 is the inlet, and 53 is the valve housing.
54 is a valve seat, 54 is a valve body, 55 is a spring, 56 is a rib, 57 is a spring receiver, and 58 is an outlet.

このように本発明のフロート式トラップに於いては、出
口側に背圧調節弁を配し、且つ背圧室と復水溜り室とを
絞った状態で連通ずることにより入口と背圧室との差圧
に基づいて弁口を開弁ずるので、従来の入口、出口の差
圧に基づいて弁口を開弁ずるものに比べ、簡単な構造で
極めて大きな弁口面積を開弁できる。In this way, in the float-type trap of the present invention, the back pressure control valve is disposed on the outlet side, and the back pressure chamber and the condensate reservoir chamber are communicated in a throttled state, so that the inlet and the back pressure chamber can be connected to each other. Since the valve opening is opened based on the differential pressure between the inlet and the outlet, it is possible to open the valve opening with a much larger area with a simpler structure than the conventional valve opening based on the differential pressure between the inlet and the outlet.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の一実施例で、第２図は他の実施例、第
３，４図は第２図の実施例に用いられる背圧調節弁の一
例を示す。 １，２１は本体、２，２２は上蓋、３，２３はガスケッ
ト、４．２４は復水溜り室、５．２５は入口、６，２６
は隔壁、７，２７は気孔、８は背圧室、９，２９は弁口
、１０，３０は背圧調節弁、１１．３１は出口、１２．
３２は弁座、１３．３３はオリフイス、１８．３４はフ
ロート、２８は出口通路である。FIG. 1 shows one embodiment of the present invention, FIG. 2 shows another embodiment, and FIGS. 3 and 4 show an example of a back pressure regulating valve used in the embodiment of FIG. 1, 21 are the main body, 2, 22 are the upper lid, 3, 23 are the gaskets, 4.24 are the condensate reservoir chamber, 5.25 are the inlets, 6, 26
1 is a partition, 7 and 27 are air holes, 8 is a back pressure chamber, 9 and 29 are valve ports, 10 and 30 are back pressure control valves, 11.31 is an outlet, 12.
32 is a valve seat, 13.33 is an orifice, 18.34 is a float, and 28 is an outlet passage.

Claims (1)

【特許請求の範囲】[Claims] １ 人口及び弁口を通して出口が連通ずる復水溜り室を
設け、該復水溜り室内にフロートを配し、該フロートの
変位によって弁口を開閉するフロート式トラップに於い
て、出口側に背圧調節弁を配し弁口に連通ずる背圧室を
形成し、該背圧室と復水溜り室とを絞った状態で連通せ
しめて成るフロート式トラップ。1. A float type trap is provided with a condensate reservoir chamber whose outlet communicates through the condensate reservoir chamber and a valve port, and a float is arranged in the condensate reservoir chamber, and the valve port is opened and closed by the displacement of the float, with back pressure on the outlet side. A float type trap in which a control valve is arranged to form a back pressure chamber communicating with a valve port, and the back pressure chamber and a condensate reservoir chamber are communicated in a throttled state.