JP2016056822A - safety valve - Google Patents
safety valve Download PDFInfo
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- JP2016056822A JP2016056822A JP2014181258A JP2014181258A JP2016056822A JP 2016056822 A JP2016056822 A JP 2016056822A JP 2014181258 A JP2014181258 A JP 2014181258A JP 2014181258 A JP2014181258 A JP 2014181258A JP 2016056822 A JP2016056822 A JP 2016056822A
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- container
- housing
- passage
- safety valve
- spacer
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- 125000006850 spacer group Chemical group 0.000 claims abstract description 29
- 230000006835 compression Effects 0.000 claims abstract description 12
- 238000007906 compression Methods 0.000 claims abstract description 12
- 238000007599 discharging Methods 0.000 claims description 12
- 239000000155 melt Substances 0.000 claims description 12
- 229910000743 fusible alloy Inorganic materials 0.000 abstract description 12
- 229910045601 alloy Inorganic materials 0.000 description 22
- 239000000956 alloy Substances 0.000 description 22
- 230000002093 peripheral effect Effects 0.000 description 19
- 230000009172 bursting Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
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Abstract
Description
この発明は、安全弁に関し、特に、火災発生時等に容器内圧力が上昇し過ぎることを防止するため、容器に取り付けられて温度が上昇した場合に容器内のガスを開放する安全弁に関する。 The present invention relates to a safety valve, and more particularly to a safety valve that is attached to a container and releases gas in the container when the temperature rises in order to prevent the pressure in the container from rising excessively in the event of a fire.
このような安全弁として、高温時に融解する感熱体としての可溶体を有し、可溶体の融解に伴って可動栓体が移動することで、容器内のガスを開放する安全弁が知られている（特許文献１）。
上記安全弁は、容器の開口部に設置されるが、容器が長寸であって、開口部から離れた容器の部分が加熱された場合、開口部の温度が上昇する前に、容器内圧力が所定値を越えることがある。すなわち、容器が長寸の場合には、安全弁が作動すべき条件に達しても、作動しない恐れがある。 The safety valve is installed at the opening of the container.If the container is long and the part of the container away from the opening is heated, the pressure in the container is increased before the temperature of the opening rises. May exceed a predetermined value. That is, when the container is long, it may not operate even if the safety valve reaches a condition to operate.
この発明の目的は、容器が長寸であっても、確実に作動する安全弁を提供することにある。 An object of the present invention is to provide a safety valve that operates reliably even when the container is long.
この発明による安全弁は、所定温度以上で溶融または分解する感熱体、感熱体の溶融または分解に伴って移動する移動体および移動体を感熱体に向けて付勢する圧縮コイルばねを有する円筒状筐体と、筐体に固定された本体と、本体内の可動栓体配置通路に配されて移動体の移動に伴って移動する可動栓体と、可動栓体配置通路に通じ可動栓体の移動によって開放される逃がし通路とを備えている安全弁において、筐体内に、移動体、圧縮コイルばねおよび第１の感熱体を収納する第１収納部と、第１収納部の軸方向に連なる第２収納部とが設けられており、第２収納部内に、一端が第１の感熱体に当接し軸方向に移動可能なスペーサおよびスペーサの他端に当接する第２の感熱体が収納されていることを特徴とするものである。 A safety valve according to the present invention includes a cylindrical body having a heat sensitive body that melts or decomposes at a predetermined temperature or more, a moving body that moves as the heat sensitive body melts or decomposes, and a compression coil spring that biases the moving body toward the heat sensitive body. Body, a main body fixed to the housing, a movable plug body that is arranged in the movable plug body arrangement passage in the main body and moves as the movable body moves, and the movable plug body moves through the movable plug body arrangement passage In the safety valve provided with the relief passage opened by the first housing part, a first housing part that houses the moving body, the compression coil spring, and the first heat sensitive body in the housing, and a second that is continuous in the axial direction of the first housing part. And a second heat sensitive member that is in contact with the other end of the spacer, and a spacer that is movable in the axial direction. It is characterized by this.
感熱体は、所定の臨界温度（融解温度）以上で溶融する可溶体（可溶合金または可溶性樹脂）であってもよく、所定の臨界温度（分解温度）以上で分解または破裂するグラスバルブ（ガラス球）であってもよい。 The heat sensitive body may be a soluble body (soluble alloy or soluble resin) that melts at a predetermined critical temperature (melting temperature) or higher, and a glass bulb (glass) that decomposes or bursts at a predetermined critical temperature (decomposition temperature) or higher. Sphere).
第１収納部に収納された移動体、圧縮コイルばねおよび第１の感熱体は、従来と同様のもので、これらの構成によって、安全弁が取り付けられている容器の周囲の温度が第１の感熱体の臨界温度を超えた場合、第１の感熱体が溶融または分解し、これに伴って、移動体が移動して、可動栓体が移動可能となり、容器内圧力で可動栓体が移動させられて、容器内のガスが本体の可動栓体配置通路および逃がし通路を経て抜け出す。これによって、容器の破裂が防止される。 The moving body, the compression coil spring, and the first heat sensitive body housed in the first housing portion are the same as those in the conventional case, and with these configurations, the temperature around the container to which the safety valve is attached is the first heat sensitive body. When the critical temperature of the body is exceeded, the first heat sensitive body melts or decomposes, and accordingly, the moving body moves and the movable plug body becomes movable, and the movable plug body is moved by the pressure in the container. Then, the gas in the container escapes through the movable stopper arrangement passage and the escape passage of the main body. This prevents the container from bursting.
容器の周囲の温度が第１の感熱体の臨界温度を超えないが、第２の感熱体の臨界温度を超えた場合、第２の感熱体が溶融または分解し、これに伴って、スペーサ、第１の感熱体および移動体が移動して、可動栓体が移動可能となり、容器内圧力で可動栓体が移動させられて、容器内のガスが本体の可動栓体配置通路および逃がし通路を経て抜け出す。これによって、容器の破裂が防止される。 When the ambient temperature of the container does not exceed the critical temperature of the first heat sensitive element, but exceeds the critical temperature of the second heat sensitive element, the second heat sensitive element melts or decomposes, and accordingly, a spacer, The first heat sensitive body and the moving body move, the movable plug body becomes movable, the movable plug body is moved by the pressure in the container, and the gas in the container passes through the movable plug body arrangement passage and the escape passage of the main body. After that, get out. This prevents the container from bursting.
こうして、この発明の安全弁によると、容器が長寸で、その一部が高温になった場合、第１の感熱体および第２の感熱体のいずれか一方が溶融または分解することで、容器内のガスが開放され、容器が長寸であっても、確実に作動する。 Thus, according to the safety valve of the present invention, when the container is long and a part of the container becomes high temperature, either the first heat sensitive body or the second heat sensitive body is melted or decomposed. Even if the gas is released and the container is long, it operates reliably.
スペーサは、例えば、アルミニウムなどの金属製とされて、円柱状、フランジ部付き円柱状、有底円筒状などとされるが、これに限定されるものではない。スペーサは、一体品であってもよく、複数の部品から形成されてもよい。 For example, the spacer is made of metal such as aluminum and has a columnar shape, a columnar shape with a flange portion, a cylindrical shape with a bottom, or the like, but is not limited thereto. The spacer may be an integral part or may be formed from a plurality of parts.
感熱体が可溶体の場合には、溶融した可溶体を排出するための通路が適宜な位置に設けられる。溶融した可溶体を排出するための通路は、筐体の周壁に設けられてもよく、スペーサに設けられてもよく、移動体に設けられてもよく、また、スペーサの端部の周囲に形成された間隙とされてもよく、移動体の周囲に形成された間隙とされてもよい。 When the heat sensitive body is a soluble body, a passage for discharging the melted soluble body is provided at an appropriate position. The passage for discharging the melted fusible body may be provided in the peripheral wall of the housing, may be provided in the spacer, may be provided in the moving body, and is formed around the end of the spacer. The gap may be a gap formed around the movable body.
好ましくは、スペーサの各端部に、溶融した可溶体を排出するための通路（孔または筐体との間の間隙）が設けられているものとされる。 Preferably, each end portion of the spacer is provided with a passage (a gap between the hole or the housing) for discharging the melted soluble material.
溶融した可溶体を排出するための通路が筐体の周壁を貫通するように設けられた場合、この通路を通って外部から水や砂塵等が侵入する可能性があるが、溶融した可溶体を排出するための通路がスペーサに設けられていることで、このような水や砂塵等の侵入の可能性がなくなる。これにより、安全弁の作動不良の要因が除去される。 When a passage for discharging the melted fusible body is provided so as to penetrate the peripheral wall of the housing, water or dust may enter from the outside through this passage. Since the passage for discharging is provided in the spacer, there is no possibility of such intrusion of water or dust. As a result, the cause of the malfunction of the safety valve is eliminated.
この発明の安全弁によると、安全弁が取り付けられた容器の温度上昇に伴って、第１の感熱体および第２の感熱体のいずれか一方の温度が臨界温度を超えた場合、臨界温度を超えた感熱体が融解または分解し、これに伴って、移動体が移動して、可動栓体が移動可能となり、容器内圧力で可動栓体が移動させられて、容器内のガスが本体の可動栓体配置通路および逃がし通路を経て抜け出す。これによって、容器の破裂が防止される。したがって、容器が長寸で、その一部が高温になった場合、第１の感熱体および第２の感熱体のいずれか一方が融解または分解することで、容器内のガスが開放され、容器が長寸であっても、確実に安全弁が作動する。 According to the safety valve of the present invention, when the temperature of one of the first heat sensitive body and the second heat sensitive body exceeds the critical temperature as the temperature of the container to which the safety valve is attached increases, the critical temperature is exceeded. The heat sensitive body melts or decomposes, and the moving body moves accordingly, the movable plug body becomes movable, the movable plug body is moved by the pressure in the container, and the gas in the container is moved to the movable plug of the main body. It escapes through the body arrangement passage and the escape passage. This prevents the container from bursting. Therefore, when the container is long and a part of the container becomes high in temperature, either the first heat sensitive body or the second heat sensitive body is melted or decomposed to release the gas in the container. Even if is long, the safety valve operates reliably.
この発明の実施の形態を、以下図面を参照して説明する。以下の説明において、上下および左右は、図１の上下および左右をいうものとする。 Embodiments of the present invention will be described below with reference to the drawings. In the following description, up and down and left and right refer to up and down and left and right in FIG.
図１は、この発明の安全弁の１実施形態を示している。図１は、安全弁の雰囲気温度が所定値以下の通常状態、すなわち、通路が閉鎖された状態を示している。 FIG. 1 shows an embodiment of the safety valve of the present invention. FIG. 1 shows a normal state where the ambient temperature of the safety valve is lower than a predetermined value, that is, a state where the passage is closed.
この実施形態の安全弁(1)は、左右方向にのびる円筒状筐体(2)と、筐体(2)の右端部に固定されて下方にのびる本体(3)と、上端部が筐体(2)内に突出するように本体(3)内の可動栓体配置通路(5)に配された可動栓体(4)と、可動栓体配置通路(5)に通じ可動栓体(4)の移動によって開放される逃がし通路(6)とを備えている。を備えている。 The safety valve (1) of this embodiment includes a cylindrical casing (2) extending in the left-right direction, a main body (3) fixed to the right end of the casing (2) and extending downward, and an upper end of the casing ( 2) A movable plug body (4) arranged in the movable plug body arrangement passage (5) in the main body (3) so as to protrude into the main body (3), and a movable plug body (4) connected to the movable plug body arrangement passage (5) And an escape passage (6) that is opened by the movement of. It has.
筐体(2)内には、左右方向に所定間隔をおいて配置された右側（第１）の可溶合金（感熱体）(11)および左側（第２）の可溶合金（感熱体）(12)と、右側の可溶合金(11)と左側の可溶合金(12)との間に介在させられたスペーサ(13)と、第１の可溶合金(11)に右側から当接し第１の可溶合金(11)または第２の可溶合金(12)の融解に伴って左方に移動する移動体(14)と、移動体(14)を左方に向けて付勢する圧縮コイルばね(15)とが設けられている。 In the housing (2), the right (first) soluble alloy (thermosensitive body) (11) and the left (second) soluble alloy (thermosensitive body) arranged at predetermined intervals in the left-right direction. (12), the spacer (13) interposed between the right soluble alloy (11) and the left soluble alloy (12), and the first soluble alloy (11) from the right side. A moving body (14) that moves to the left as the first fusible alloy (11) or the second fusible alloy (12) melts, and the moving body (14) is biased toward the left. A compression coil spring (15) is provided.
右側の可溶合金(11)、移動体(14)および圧縮コイルばね(15)は、従来の安全弁における必須構成であり、これらは、筐体(2)内の右端部分（第１収納部）(7)に収納されている。 The fusible alloy (11), the movable body (14), and the compression coil spring (15) on the right side are essential components in the conventional safety valve, and these are the right end portion (first storage portion) in the housing (2). It is stored in (7).
筐体(2)は、従来のものに比べて、左方に長く伸ばされており、筐体(2)内の左側部分に第２収納部(8)が形成され、ここに、左側（第２）の可溶合金（感熱体）(12)とスペーサ(13)とが配置されている。 The housing (2) is elongated to the left as compared with the conventional one, and a second storage portion (8) is formed on the left side of the housing (2). 2) A soluble alloy (heat sensitive body) (12) and a spacer (13) are arranged.
筐体(2)の右端部は底壁(2b)によって閉鎖されている。通常時に、各部材(11)(12)(13)(14)が圧縮コイルばね(15)の付勢力によって左方に動かないようにするための蓋(16)が、筐体(2)の左端部に左側の可溶合金(12)に当接するように嵌め入れられて固定されている。 The right end of the housing (2) is closed by the bottom wall (2b). The lid (16) for preventing the members (11), (12), (13), and (14) from moving to the left by the biasing force of the compression coil spring (15) during normal operation is provided on the housing (2). The left end portion is fitted and fixed so as to contact the fusible alloy (12) on the left side.
安全弁(1)は、本体(3)が容器(C)に取り付けられて使用され、異常時に作動するもので、異常は、例えば火災が発生して高温となった場合などで、この場合、可溶合金(11)(12)の少なくとも一方が所定温度で融解し、これに伴って、圧縮コイルばね(15)で左方に付勢された移動体(14)が左方に移動し、これに伴って、可動栓体(4)が移動可能となり、容器(C)内圧力で可動栓体(4)が上方に移動させられ、これにより、容器(C)内のガスが本体(3)の可動栓体配置通路(5)および逃がし通路(6)を経て抜け出すようになされている。 The safety valve (1) is used when the main body (3) is attached to the container (C) and operates in the event of an abnormality. At least one of the molten alloys (11) and (12) melts at a predetermined temperature, and accordingly, the moving body (14) biased to the left by the compression coil spring (15) moves to the left, Accordingly, the movable stopper (4) can be moved, and the movable stopper (4) is moved upward by the pressure in the container (C), whereby the gas in the container (C) is moved to the main body (3). The movable plug body arrangement passage (5) and the escape passage (6) are used to escape.
本体(3)は、容器(C)の取付け形状に応じて、その形状が決定されるもので、図１には、その一部だけが示されている。 The shape of the main body (3) is determined according to the mounting shape of the container (C), and only a part thereof is shown in FIG.
逃がし通路(6)は、可動栓体配置通路(5)に比べて、径にして１．２倍以上（１．５倍程度）に太くなされている。 The escape passage (6) is 1.2 times or more (about 1.5 times) thicker in diameter than the movable stopper arrangement passage (5).
移動体(14)は、金属製で、左右にのびる軸部(14a)と、軸部(14a)の左端に設けられたフランジ部(14b)とを有している。フランジ部(14b)の径は、筐体(2)の内径にほぼ等しくなされており、軸部(14a)の外周面と筐体(2)の内周面との間には、間隙が形成されている。 The moving body (14) is made of metal and has a shaft portion (14a) extending left and right and a flange portion (14b) provided at the left end of the shaft portion (14a). The diameter of the flange portion (14b) is substantially equal to the inner diameter of the housing (2), and a gap is formed between the outer peripheral surface of the shaft portion (14a) and the inner peripheral surface of the housing (2). Has been.
スペーサ(13)は、金属製で、左右にのびる軸部(13a)と、軸部(13a)の左右端に設けられた左右フランジ部(13b)(13c)とを有している。左右フランジ部(13b)(13c)の径は、筐体(2)の内径にほぼ等しくなされており、軸部(13a)の外周面と筐体(2)の内周面との間には、間隙が形成されている。 The spacer (13) is made of metal and has a shaft portion (13a) extending to the left and right and left and right flange portions (13b) (13c) provided at the left and right ends of the shaft portion (13a). The diameter of the left and right flanges (13b) (13c) is substantially equal to the inner diameter of the housing (2), and it is between the outer peripheral surface of the shaft portion (13a) and the inner peripheral surface of the housing (2). A gap is formed.
右側の可溶合金(11)は、円板状とされて、スペーサ(13)の右フランジ部(13c)の右面と移動体(14)のフランジ部(14b)の左面との間に配されている。左側の可溶合金(12)は、円板状とされて、スペーサ(13)の左フランジ部(13b)の左面と蓋(16)の右面との間に配されている。 The right fusible alloy (11) has a disc shape and is arranged between the right surface of the right flange portion (13c) of the spacer (13) and the left surface of the flange portion (14b) of the moving body (14). ing. The left fusible alloy (12) has a disk shape and is arranged between the left surface of the left flange portion (13b) of the spacer (13) and the right surface of the lid (16).
スペーサ(13)の右フランジ部(13c)には、融解した右側の可溶合金(11)をスペーサ(13)の軸部(13a)の外周面と筐体(2)の内周面との間の間隙に排出するための複数の貫通孔(21)が設けられており、スペーサ(13)の左フランジ部(13b)には、融解した左側の可溶合金(12)をスペーサ(13)の軸部(13a)の外周面と筐体(2)の内周面との間の間隙に排出するための複数の貫通孔(22)が設けられている。 On the right flange part (13c) of the spacer (13), the molten right soluble alloy (11) is placed between the outer peripheral surface of the shaft part (13a) of the spacer (13) and the inner peripheral surface of the housing (2). A plurality of through-holes (21) are provided for discharging into the gaps between them, and the left flange portion (13b) of the spacer (13) is filled with the melted left soluble alloy (12) with the spacer (13). A plurality of through holes (22) are provided for discharging into the gap between the outer peripheral surface of the shaft portion (13a) and the inner peripheral surface of the housing (2).
筐体(2)の右端部近傍には、移動体(14)の軸部(14a)の外径に対応する先端径を有する環状内方突出部(23)が設けられている。 Near the right end of the housing (2), an annular inward protrusion (23) having a tip diameter corresponding to the outer diameter of the shaft (14a) of the moving body (14) is provided.
圧縮コイルばね(15)は、移動体(14)の軸部(14a)の外周面と筐体(2)の内周面との間に形成された間隙内に配されて、移動体(14)のフランジ部(14b)の右面と筐体(2)の右端部近傍の環状内方突出部(23)の左面とで受け止められている。 The compression coil spring (15) is disposed in a gap formed between the outer peripheral surface of the shaft portion (14a) of the moving body (14) and the inner peripheral surface of the housing (2), and the moving body (14 ) On the right surface of the flange portion (14b) and the left surface of the annular inward projecting portion (23) in the vicinity of the right end portion of the housing (2).
本体(3)内の可動栓体配置通路(5)の延長線上に位置するように、筐体(2)の周壁(2a)の下部には、環状内方突出部(23)の右面に沿って下方にのびる貫通孔(24)が設けられるとともに、貫通孔(24)の下端の開口縁部に、周壁(2a)から下方にのびる円筒状突出部(25)が設けられている。円筒状突出部(25)は、本体(3)の上面に設けられた環状の嵌合凹所(26)の上部に嵌め合わされている。環状内方突出部(23)の下部右面と底壁(2b)の左面との間、貫通孔(24)および円筒状突出部(25)内は、筐体側の可動栓体配置通路を形成している。 The lower part of the peripheral wall (2a) of the housing (2) is along the right side of the annular inward projecting part (23) so that it is located on the extension line of the movable plug body arrangement passage (5) in the main body (3). A through-hole (24) extending downward is provided, and a cylindrical protrusion (25) extending downward from the peripheral wall (2a) is provided at the opening edge of the lower end of the through-hole (24). The cylindrical protrusion (25) is fitted into an upper portion of an annular fitting recess (26) provided on the upper surface of the main body (3). Between the lower right surface of the annular inward projecting portion (23) and the left surface of the bottom wall (2b), the through hole (24) and the cylindrical projecting portion (25) form a movable plug body arrangement passage on the housing side. ing.
環状内方突出部(23)の上部右面と底壁(2b)の左面との間に、筐体側の可動栓体配置通路の終端部を形成し、作動時の可動栓体(4)の位置決めを行う位置決め凹所(27)が設けられている。 Between the upper right surface of the annular inward projecting portion (23) and the left surface of the bottom wall (2b), a terminal end portion of the movable plug body arrangement passage on the housing side is formed to position the movable plug body (4) during operation. A positioning recess (27) for performing the above is provided.
可動栓体(4)は、本体(3)内の可動栓体配置通路(5)および筐体側の可動栓体配置通路に移動可能に嵌め入れられている。可動栓体(4)の外周の本体(3)側および筐体側に、本体側シール用リング(28)および筐体側シール用リング(29)がそれぞれ嵌められている。 The movable plug body (4) is movably fitted in the movable plug body arrangement passage (5) in the main body (3) and the movable plug body arrangement passage on the housing side. A main body-side sealing ring (28) and a housing-side sealing ring (29) are respectively fitted to the outer periphery of the movable plug (4) on the main body (3) side and the housing side.
可動栓体(4)は、移動体(14)の軸部(14a)の右端部に下側から当接させられており、これにより、可動栓体(4)の上方への移動が阻止されている。可動栓体(4)に設けられた本体側シール用リング(28)は、可動栓体配置通路(5)の内周面に密着しており、これにより、通常時における可動栓体配置通路(5)からのガスの漏れが防止されている。筐体側シール用リング(29)は、円筒状突出部(25)の内周面に密着しており、これにより、逃がし通路(6)から筐体(2)内に水や砂塵等が侵入することが防止されている。 The movable plug (4) is brought into contact with the right end of the shaft (14a) of the movable body (14) from the lower side, thereby preventing the movable plug (4) from moving upward. ing. The main body side sealing ring (28) provided on the movable plug (4) is in close contact with the inner peripheral surface of the movable plug arrangement passage (5). Gas leakage from 5) is prevented. The casing-side sealing ring (29) is in close contact with the inner peripheral surface of the cylindrical protrusion (25), so that water, dust, etc. enter the casing (2) from the escape passage (6). It is prevented.
移動体(14)が左方に移動して、可動栓体(4)の上方への移動が可能となった場合、可動栓体(4)は、容器(C)内圧力によって上方に移動させられる。 When the movable body (14) moves to the left and the movable stopper (4) can be moved upward, the movable stopper (4) is moved upward by the internal pressure of the container (C). It is done.
逃がし通路(6)は、本体(3)上面の嵌合凹所(26)の下部に連なって可動栓体配置通路(5)に対して直交する方向にのびるように形成されている。したがって、可動栓体(4)の下端が嵌合凹所(26)の下部内まで移動すると、逃がし通路(6)を介して、容器(C)内のガスが開放される。 The escape passage (6) is formed so as to extend in a direction orthogonal to the movable plug body disposing passage (5), continuing to the lower portion of the fitting recess (26) on the upper surface of the main body (3). Therefore, when the lower end of the movable plug (4) moves into the lower part of the fitting recess (26), the gas in the container (C) is released through the escape passage (6).
この実施形態の安全弁(1)は、スペーサ(13)および左側の可溶合金(12)が追加されている点で、従来のものと相違している。 The safety valve (1) of this embodiment is different from the conventional one in that a spacer (13) and a fusible alloy (12) on the left side are added.
安全弁(1)が取り付けられている容器(C)の周囲の温度が右側の可溶合金(11)の臨界温度を超えた場合、右側の可溶合金(11)が融解し、これに伴って、移動体(14)が左方に移動して、可動栓体(4)が移動可能となり、容器(C)内圧力で可動栓体(4)が移動させられて、容器(C)内のガスが本体(3)の可動栓体配置通路(5)および逃がし通路(6)を経て抜け出す。これによって、容器(C)の破裂が防止される。 When the temperature around the container (C) to which the safety valve (1) is attached exceeds the critical temperature of the right soluble alloy (11), the right soluble alloy (11) melts, The movable body (14) moves to the left, the movable plug body (4) becomes movable, and the movable plug body (4) is moved by the pressure in the container (C), so that the inside of the container (C) The gas escapes through the movable stopper arrangement passage (5) and the escape passage (6) of the main body (3). This prevents the container (C) from bursting.
容器(C)の周囲の温度が右側の可溶合金(11)の臨界温度を超えないが、左側の可溶合金(12)の臨界温度を超えた場合、左側の可溶合金(12)が融解し、これに伴って、スペーサ(13)、右側の可溶合金(11)および移動体(14)が左方に移動して、可動栓体(4)が移動可能となり、容器(C)内圧力で可動栓体(4)が移動させられて、容器(C)内のガスが本体(3)の可動栓体配置通路(5)および逃がし通路(6)を経て抜け出す。これによって、容器(C)の破裂が防止される。 If the temperature around the container (C) does not exceed the critical temperature of the right soluble alloy (11), but exceeds the critical temperature of the left soluble alloy (12), the left soluble alloy (12) Melting and accompanying this, the spacer (13), the right soluble alloy (11) and the moving body (14) move to the left, the movable stopper (4) becomes movable, and the container (C) The movable stopper (4) is moved by the internal pressure, and the gas in the container (C) escapes through the movable stopper arrangement passage (5) and the escape passage (6) of the main body (3). This prevents the container (C) from bursting.
こうして、この実施形態の安全弁(1)によると、容器(C)が長寸で、その一部が高温になった場合、２つの可溶合金(11)(12)のうちの少なくとも一方が融解することで、容器(C)内のガスが開放され、容器(C)が長寸であっても、確実に作動する。 Thus, according to the safety valve (1) of this embodiment, when the container (C) is long and a part thereof becomes high temperature, at least one of the two fusible alloys (11) and (12) is melted. By doing so, the gas in the container (C) is released, and even if the container (C) is long, it operates reliably.
なお、上記において、スペーサ(13)の各端部である左右フランジ部(13b)(13c)に、溶融した可溶合金(11)(12)を排出するための通路（複数の貫通孔(21)(22)）が設けられているが、溶融した可溶合金(11)(12)を排出するための通路は、筐体(2)の周壁(2a)を貫通するように設けられてもよい。ただし、溶融した可溶合金(11)(12)を排出するための通路が筐体(2)の周壁(2a)を貫通するように設けられている場合、この通路を通って外部から水や砂塵等が侵入する可能性があることから、スペーサ(13)に設けることがより好ましい。右側の可溶合金(11)を排出するための通路となる複数の貫通孔は、移動体(14)のフランジ部(14b)に設けることもできる。また、スペーサ(13)または移動体(14)のフランジ部(13b)(13c)(14b)に複数の貫通孔を設けることに代えて、フランジ部(13b)(13c)(14b)の径を小さくすることで、フランジ部(13b)(13c)(14b)と筐体(2)の周壁(2a)との間に間隙を形成し、この間隙から溶融した可溶合金(11)(12)を排出するようにしてもよい。 In the above description, a passage (a plurality of through holes (21) for discharging the melted soluble alloy (11) (12) to the left and right flange portions (13b) (13c), which are the respective ends of the spacer (13) ) (22)) is provided, but the passage for discharging the meltable soluble alloy (11) (12) may be provided so as to penetrate the peripheral wall (2a) of the housing (2). Good. However, when a passage for discharging the melted soluble alloy (11) (12) is provided so as to penetrate the peripheral wall (2a) of the housing (2), water or water is externally passed through this passage. It is more preferable to provide the spacer (13) because dust or the like may enter. A plurality of through holes serving as passages for discharging the right soluble alloy (11) may be provided in the flange portion (14b) of the movable body (14). Further, instead of providing a plurality of through holes in the flange (13b) (13c) (14b) of the spacer (13) or the moving body (14), the diameter of the flanges (13b) (13c) (14b) is reduced. By making it small, a gap is formed between the flange portion (13b) (13c) (14b) and the peripheral wall (2a) of the housing (2), and the fusible alloy (11) (12) melted from this gap May be discharged.
また、上記の可溶合金(11)(12)（感熱体の１例）は、所定の臨界温度（分解温度）以上で分解または破裂するグラスバルブ（ガラス球）に置き換えることができる。 Moreover, said soluble alloy (11) (12) (an example of a heat sensitive body) can be replaced with a glass bulb (glass sphere) that decomposes or bursts at a predetermined critical temperature (decomposition temperature) or higher.
(1)：安全弁、(2)：筐体、(3)：本体、(4)：可動栓体、(5)：可動栓体配置通路、(6)：逃がし通路、(11)：第１の可溶合金（感熱体）、(12)：第２の可溶合金（感熱体）、(13)：スペーサ、(14)：移動体、(15)：圧縮コイルばね、(21(22)：貫通孔 (1): Safety valve, (2): Housing, (3): Main body, (4): Movable plug, (5): Movable plug placement passage, (6): Relief passage, (11): First (12): second soluble alloy (heat sensitive body), (13): spacer, (14): moving body, (15): compression coil spring, (21 (22) : Through hole
Claims (2)
筐体内に、移動体、圧縮コイルばねおよび第１の感熱体を収納する第１収納部と、第１収納部の軸方向に連なる第２収納部とが設けられており、第２収納部内に、一端が第１の感熱体に当接し軸方向に移動可能なスペーサおよびスペーサの他端に当接する第２の感熱体が収納されていることを特徴とする安全弁。 A heat-sensitive body that melts or decomposes at a predetermined temperature or more, a moving body that moves as the heat-sensitive body melts or decomposes, and a cylindrical housing that has a compression coil spring that biases the moving body toward the heat-sensitive body; A fixed main body, a movable plug body that is arranged in a movable plug body arrangement passage in the main body and moves with the movement of the mobile body, and an escape passage that is opened by movement of the movable plug body through the movable plug body arrangement passage In a safety valve equipped with
The housing is provided with a first storage portion for storing the moving body, the compression coil spring, and the first heat sensitive body, and a second storage portion that extends in the axial direction of the first storage portion. A safety valve comprising: a spacer that has one end in contact with the first heat sensitive body and is movable in the axial direction; and a second heat sensitive body in contact with the other end of the spacer.
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