JPS628700Y2 - - Google Patents

Description

【考案の詳細な説明】 本考案は、過流出防止弁、特に、過流出防止弁
の作動を遅延させるようにした、所謂、遅延式の
過流出防止弁に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an overflow prevention valve, and particularly to a so-called delay-type overflow prevention valve that delays the operation of the overflow prevention valve.

従来の過流出防止弁は、筒体２の下流側開放端
を弁座口１とし、その下方の筒室内に適宜大きさ
の球弁３を自由状態に収容するとともに、該球弁
の重さを適宜に設定したものであり、過流出状態
になつた時、球弁３はガス流抵抗により持ち上げ
られて、弁座口１に嵌入する。 The conventional overflow prevention valve has a valve seat opening 1 at the downstream open end of a cylinder body 2, and a ball valve 3 of an appropriate size is accommodated in a free state in a cylinder chamber below the valve seat opening 1, and the weight of the ball valve is is set appropriately, and when an overflow condition occurs, the ball valve 3 is lifted up by the gas flow resistance and fitted into the valve seat opening 1.

ところが、この場合の球弁の作動時間（上昇移
動開始してから弁座口１に嵌入するまでの時間）
が短い。 However, the operating time of the ball valve in this case (the time from the start of upward movement until it is fitted into the valve seat port 1)
is short.

この過流出防止弁の下流側に電磁弁を具備する
ガス器具が接続されている場合、電磁弁の開弁は
瞬間的であることから、これらの開弁時、その下
流側の器具内回路に急激にガスが流れ、その後、
定常状態となる。前記過大流量状態では、既述の
過流出状態と同じガス流量状態（以下疑似過流出
状態という）にあり、この疑似過流出状態の持続
時間は、球弁の作動時間を越えたものとなる。す
なわち、この間に、球弁３が作動して弁座口１に
嵌入してしまう不都合が生じる。 If a gas appliance equipped with a solenoid valve is connected downstream of this overflow prevention valve, the opening of the solenoid valve is instantaneous, so when these valves open, the circuit inside the appliance on the downstream side will be affected. Gas flows rapidly, and then
It becomes a steady state. In the overflow state, the gas flow rate is the same as the overflow state described above (hereinafter referred to as a pseudo overflow state), and the duration of this pseudo overflow state exceeds the operating time of the ball valve. That is, during this time, the ball valve 3 operates and is inconveniently inserted into the valve seat opening 1.

かかる不都合を解消するものとして、すでに、
実願昭55−147212号（実開昭57−70567号）のも
のを提案した。 As a solution to this inconvenience, we have already
We proposed Utility Application No. 55-147212 (Utility Model Application No. 57-70567).

この先行技術のものは、第１図の如く、球弁３
を自由状態に収容する筒体２内に、複数の突起
４，４を千鳥状に設けたものであることから、過
流出状態においては、筒体２の下端部に位置して
いた球弁３が、弁座口１に嵌入するまでに、前記
突起４，４に衝突を繰り返しながら上昇移動する
こととなる。 This prior art has three ball valves as shown in FIG.
Since a plurality of protrusions 4, 4 are provided in a staggered manner in the cylinder body 2 that accommodates the valve in a free state, in an overflow state, the ball valve 3 located at the lower end of the cylinder body 2 However, until it is fitted into the valve seat opening 1, it moves upward while repeatedly colliding with the protrusions 4, 4.

従つて、球弁３が上昇開始してから、弁座口１
に嵌入するまでの作動時間が長くなる。言い換え
れば、過流出防止弁の作動が遅延される。 Therefore, after the ball valve 3 starts to rise, the valve seat opening 1
It takes longer to operate until it engages. In other words, the operation of the overflow prevention valve is delayed.

このことから、過流出防止弁の下流側に電磁弁
等の急開閉弁とガバナとの組み合わせを有する器
具を接続して、この器具の前記急開閉弁を開弁さ
せた場合において、過流出防止弁が作動してしま
うことはない。前記急開閉弁に生じる疑似過流出
状態の時間よりも、球弁３の作動に要する時間が
長くなるからである。 For this reason, when a device that has a combination of a quick-open/close valve such as a solenoid valve and a governor is connected to the downstream side of the overflow prevention valve, and the quick-open/close valve of this device is opened, the overflow prevention The valve will never operate. This is because the time required to operate the ball valve 3 is longer than the time required for the pseudo-overflow state that occurs in the quick-open/close valve.

ところが、この先行技術のものでは、過流出状
態において、球弁が初期位置から弁座口に嵌入す
るまでの所要時間、すなわち、遅延時間が一定し
ないという問題があつた。 However, in this prior art, there is a problem in that the time required for the ball valve to fit into the valve seat opening from the initial position, that is, the delay time, is not constant in an overflow state.

これは、初期状態において、筒体２内の内周壁
に設けた突起４，４と、球弁３との関係位置が一
定せず、第２図の如く、筒体２の内周との関係は
Ａ，Ｂ等種々に変化するからである。 This is because, in the initial state, the relationship between the protrusions 4, 4 provided on the inner peripheral wall of the cylinder 2 and the ball valve 3 is not constant, and as shown in FIG. This is because A, B, etc. change in various ways.

すなわち、このことから、過流出状態（疑似過
流出状態を含む）で球弁３が上昇するとき、球弁
３の初期位置によつては、最下位に位置する突起
４に衝突しないことが生じたりするからで、球弁
３の初期位置相違によつて衝突回数が相違するか
らである。 That is, from this, when the ball valve 3 rises in an overflow state (including a pseudo overflow state), depending on the initial position of the ball valve 3, it may not collide with the protrusion 4 located at the lowest position. This is because the number of collisions differs depending on the difference in the initial position of the ball valve 3.

（技術的課題） 本考案は、このような、〓筒体２内に、球弁３
の移動軌跡に突出する突出部を設け、この筒体２
の上端開口部を弁座口１とするとともに、下端開
口部に線状の球弁支持部材を設け、球弁３が筒体
２の軸線に対して直角方向にも少範囲移動できる
ようにした過流出防止弁〓において、遅延時間の
安定性を図るため、初期状態にある球弁３と突出
部との関係が一定するようにすることをその技術
的課題とする。(Technical Problem) The present invention has a ball valve 3 inside the cylindrical body 2.
A protrusion is provided that protrudes on the movement locus of the cylindrical body 2.
The upper end opening serves as the valve seat opening 1, and a linear ball valve support member is provided at the lower end opening, so that the ball valve 3 can move within a small range in a direction perpendicular to the axis of the cylinder body 2. In order to stabilize the delay time in the overflow prevention valve, the technical problem is to maintain a constant relationship between the ball valve 3 and the protrusion in the initial state.

（技術的手段） 上記技術的課題を解決するために講じた本考案
の技術的手段は、〓球弁支持部材を筒体２の上流
側開放端において、半径方向に配設するととも
に、この球弁支持部材と球弁３との接触部を傾斜
辺部とした〓ことである。(Technical Means) The technical means of the present invention taken to solve the above technical problem is as follows: A ball valve support member is disposed in the radial direction at the upstream open end of the cylinder body 2, and The contact portion between the valve support member and the ball valve 3 is made into an inclined side portion.

（作用） 本考案の上記技術的手段は次のように作用す
る。(Operation) The above technical means of the present invention operates as follows.

筒体２内において、球弁３は、筒体２の内周壁
と球弁支持部材とによつて支持されることとなる
が、この支持状態において、球弁３は、傾斜辺部
と筒体２の内周壁の両方に接触する状態にあるか
ら、初期状態においては、球弁３は前記傾斜辺の
下位側に移動し且、内周壁と接触した特定位置に
定置されたものとなる。 Inside the cylinder body 2, the ball valve 3 is supported by the inner circumferential wall of the cylinder body 2 and the ball valve support member. In this supported state, the ball valve 3 is supported by the inclined side part and the cylinder body. Since the ball valve 3 is in contact with both of the inner circumferential walls of the ball valve 2, in the initial state, the ball valve 3 moves to the lower side of the inclined side and is fixed at a specific position where it contacts the inner circumferential walls.

従つて、球弁３の初期位置は、上方の突出部と
常に一定の関係にあることとなる。 Therefore, the initial position of the ball valve 3 is always in a constant relationship with the upper protrusion.

（効果） 球弁３の初期位置と、球弁３の移動軌跡内に突
出する突出部との位置関係が常に一定となるか
ら、球弁３の動作の度に突出部との衝突回数が変
るようなことはなく、遅延時間が安定する。(Effect) Since the positional relationship between the initial position of the ball valve 3 and the protrusion that protrudes within the movement trajectory of the ball valve 3 is always constant, the number of collisions with the protrusion changes every time the ball valve 3 operates. This does not happen, and the delay time becomes stable.

以下、本考案の実施例を図面に基づいて説明を
加える。 Hereinafter, embodiments of the present invention will be explained based on the drawings.

第３図に示す実施例は、逆Ｌ字状の主体１０を
持つもので、その内部に横向きで上流側に向つて
テーパー状に拡大する弁座口１とその上流側に続
く斜行流路１１とからなる流路が形成されてお
り、この斜行流路１２中に球弁３が収容され、弁
座口１の大きさは該球弁の直径に合せて適宜に設
定してある。前記球弁は、定常状態では斜行流路
１１の下端すなわち上流端に位置するが、該球弁
は、下辺部１２の両側に立ち上り部１３，１４を
連設した枠片により支持されており、球弁３は定
常状態では、下辺部１２と斜めに上昇する一方の
立ち上り部１３に当接して一定位置に静止してい
る。 The embodiment shown in FIG. 3 has an inverted L-shaped main body 10, and inside thereof there is a valve seat opening 1 that is oriented horizontally and expands in a tapered shape toward the upstream side, and an oblique flow passage that continues on the upstream side. A ball valve 3 is housed in this oblique flow path 12, and the size of the valve seat opening 1 is appropriately set according to the diameter of the ball valve. The ball valve is located at the lower end, that is, the upstream end, of the diagonal flow path 11 in a steady state, and is supported by a frame piece with rising parts 13 and 14 connected to both sides of the lower side part 12. In a steady state, the ball valve 3 rests at a fixed position in contact with the lower side 12 and one rising portion 13 that rises obliquely.

上記枠片の立ち上り部１３，１４の上端には屈
曲片１５，１６が連設されて、これらが、主体１
０の側壁に貫通させた小孔に係合すると共に、主
体１０の屈曲背部に位置する一方の立ち上り部１
４の上端部には突起１７が前記屈曲片と共に設け
られている。 Bent pieces 15 and 16 are connected to the upper ends of the rising parts 13 and 14 of the frame pieces, and these bend pieces 15 and 16
One rising portion 1 engages with a small hole penetrated through the side wall of the main body 10 and is located at the bent back of the main body 10.
A protrusion 17 is provided at the upper end of 4 together with the bent piece.

上記枠片は弾性線材で構成され、主体１０内へ
は、立ち上り部１３，１４の自由端部を縮少させ
て挿入し、屈曲片１５，１６を主体１０の小孔に
係合させると該枠片の主体１０内への組み込みが
完了する。 The frame piece is made of an elastic wire, and is inserted into the main body 10 by reducing the free ends of the rising parts 13 and 14, and when the bent pieces 15 and 16 are engaged with the small holes of the main body 10, the frame pieces are inserted into the main body 10. The assembly of the frame piece into the main body 10 is completed.

この実施例の場合、球弁３は一方の立ち上り部
１３と下辺部１４に支持されて定常状態では主体
１０の斜行流路１１の下端部で一定位置に保たれ
るため、球弁３の外周間隙を介するガス流量も一
定する。すなわち、作動流量が安定する。 In the case of this embodiment, the ball valve 3 is supported by one of the rising parts 13 and the lower part 14 and is kept at a constant position at the lower end of the oblique passage 11 of the main body 10 in a steady state. The gas flow rate through the circumferential gap is also constant. In other words, the operating flow rate is stabilized.

過流出状態になると、球弁３が上昇移動する
が、その移動過程で突起１７に当接して、いつた
ん移動速度が低下した後方向変換して弁座口１に
嵌入する。従つて、球弁３の作動時間が従来にく
らべて長くなり、電磁弁を具備した器具を接続し
た場合に於いて該電磁弁開弁時に生じる疑似過流
出状態での作動が防止できる。 When the overflow occurs, the ball valve 3 moves upward, but during the movement, it comes into contact with the protrusion 17, and after the speed of movement decreases, the ball valve 3 changes direction and fits into the valve seat opening 1. Therefore, the operating time of the ball valve 3 is longer than in the past, and when a device equipped with a solenoid valve is connected, operation in a pseudo-overflow state that occurs when the solenoid valve is opened can be prevented.

過流出防止弁の下流側は正常に復元されたとき
には、ガス回路をガスコツク等でいつたん遮断し
た後、適宜手段で球弁３を弁座口１から脱出させ
て斜行流路１１内に落下させ、球弁３を初期状態
に復帰させるが、この落下過程に於いても、球弁
３の落下軌跡中に障害物がなく、確実に初期位置
に復帰する。 When the downstream side of the excessive overflow prevention valve is restored to normal, the gas circuit is temporarily shut off with a gas tank, etc., and then the ball valve 3 is escaped from the valve seat opening 1 by an appropriate means and falls into the diagonal flow path 11. The ball valve 3 is returned to its initial state by causing the ball valve 3 to return to its initial position. Even during this falling process, there are no obstacles in the falling locus of the ball valve 3, and the ball valve 3 reliably returns to its initial position.

尚、球弁３の作動流量は、該球弁３の外周間隙
からのガス流量及び主体上部に設けた開口部１８
からのガス流量により定まり、高カロリーガス用
の場合は作動流量は小さく設定されるため、前記
開口部は不要となることもある。 The operating flow rate of the ball valve 3 is determined by the gas flow rate from the outer peripheral gap of the ball valve 3 and the opening 18 provided at the top of the main body.
The operating flow rate is determined by the gas flow rate from the gas flow rate, and in the case of high-calorie gas, the operating flow rate is set small, so the opening may not be necessary.

次に、第４図に示す実施例のものは、直線型の
過流出防止弁の筒体２内に適宜ピツチ及び直径の
コイルバネ２０を挿入して球弁３の上昇移動速度
を抑え、作動時間を延長させるようにしたもの
で、このコイルバネ２０の下端に斜辺部２１に続
く下辺部２２を設けて、これら二者と筒体２の内
壁の３者により球弁３が定常状態に於いて一定位
置に保たれるようにしたものである。この場合に
も、上記実施例の場合と同様に、作動流量の安定
化を図り得ると共に、球弁３の上昇移動過程で該
球弁がコイルバネ２０に接触しながら上昇するこ
ととなつてその作動時間が長くなる。すなわち、
既述の疑似過流出状態での作動が防止できる。 Next, in the embodiment shown in FIG. 4, a coil spring 20 of an appropriate pitch and diameter is inserted into the cylindrical body 2 of the linear overflow prevention valve to suppress the upward movement speed of the ball valve 3, thereby increasing the operating time. A lower side part 22 is provided at the lower end of this coil spring 20 following the oblique side part 21, and these two parts and the inner wall of the cylinder body 2 keep the ball valve 3 constant in a steady state. It is made to stay in place. In this case as well, as in the case of the above embodiment, the operating flow rate can be stabilized, and the ball valve 3 rises while contacting the coil spring 20 during the upward movement process of the ball valve 3, so that its operation can be improved. It takes longer. That is,
Operation in the pseudo-overflow state described above can be prevented.

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

第１図は従来例の説明図、第２図は球弁とその
外周流路部との関係の説明図、第３図は本考案実
施例の使用状態の断面図、第４図は他の実施例の
説明図であり、図中 １……弁座口、３……球弁。 Fig. 1 is an explanatory diagram of a conventional example, Fig. 2 is an explanatory diagram of the relationship between a ball valve and its outer circumferential flow path, Fig. 3 is a sectional view of an embodiment of the present invention in use, and Fig. 4 is an explanatory diagram of another example. It is an explanatory view of an example, and in the figure 1... Valve seat opening, 3... Ball valve.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 筒体２内に、球弁３の移動軌跡に突出する突出
部を設け、この筒体２の上端開口部を弁座口１と
するとともに、下端開口部に線状の球弁支持部材
を設け、球弁３が筒体２の軸線に対して直角方向
にも少範囲移動できるようにした過流出防止弁に
おいて、球弁支持部材を筒体２の上流側開放端に
おいて、半径方向に配設するとともに、この球弁
支持部材と球弁３との接触部を傾斜辺部として過
流出防止弁。 A protrusion that protrudes along the movement trajectory of the ball valve 3 is provided in the cylinder body 2, the upper end opening of the cylinder body 2 serves as the valve seat opening 1, and a linear ball valve support member is provided in the lower end opening. In the overflow prevention valve in which the ball valve 3 can move within a small range in the direction perpendicular to the axis of the cylinder 2, the ball valve support member is arranged in the radial direction at the upstream open end of the cylinder 2. At the same time, the contact portion between the ball valve support member and the ball valve 3 is formed as an inclined side portion to form an overflow prevention valve.