JPH06323708A - Artificial snow clogging preventive valve - Google Patents

Abstract

PURPOSE:To prevent artificial snow made from ice from clogging at the starting point of an ascent part of a pipe such as a snow conveying pipe when the artificial snow is conveyed to ski slopes in an ski area through the pipe. CONSTITUTION:A distributor main body 21 has a distribution space 21a inside so as to connect an inlet 21e and an outlet 21f, and is provided with a spout 21b and a discharge port 21c so that the conveying space 21a communicates with the outside. A movable upside block valve body 22 is mounted on the spout 21b to open and close the spout 21b so that the inlet 21e can communicate with the outside through the spout 21b. On the other hand, a movable downside block valve body 23 is mounted on the discharge port 21c to open and close the discharge port 21c so that the outlet 21f can communicate with the outside through the discharge port 21c and the discharge port 21c can be isolated from the inlet 21e.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、氷雪圧送管等の配管を
通して、人工的な雪である氷雪をスキー場のゲレンデに
搬送する場合に、該配管の上り勾配部分において氷雪が
詰ることを防止するのに好適な氷雪閉塞防止弁に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents clogging of ice and snow in an upslope portion of the pipe when ice and snow, which is artificial snow, is conveyed to a slope of a ski area through a pipe such as a snow and ice pumping pipe. The present invention relates to an ice / snow blockage prevention valve suitable for

【０００２】[0002]

【従来の技術】図５は、従来の氷雪散布設備の一例を示
す模式図である。従来の氷雪散布設備１００Ｘは、例え
ば、図５に示すように、製氷装置１０を有しており、製
氷装置１０には、氷雪圧送装置１及び氷雪圧送管５０
が、製氷装置１０により製造し貯氷された氷雪６０をゲ
レンデ７０に圧送するために設けられている。製氷装置
１０は、貯水槽１１、冷凍機１２、貯氷庫１３から構成
されており、一方、氷雪圧送装置１は、エアフィルタ
９、吸気管６、ブロア２、送気管７、熱交換器５、氷雪
フィーダ３等から構成されている。即ち、図示しないバ
ルブ等を作動させて、水６１を貯水槽１１に給水して貯
えておき、氷雪６０を製造する際に、図示しないポンプ
等を作動させて、貯水槽１１の水６１を冷凍機１２に供
給する。冷凍機１２に供給された水６１は、冷凍機１２
において小塊状の氷雪６０に製造され、貯氷庫１３に搬
送されて貯氷される。そして、ゲレンデ７０へ氷雪６０
を散布する必要があるときに、氷雪６０が貯氷庫１３か
ら取り出されて氷雪フィーダ３へ供給される。貯氷庫１
３から氷雪フィーダ３に供給された氷雪６０は、氷雪圧
送管５０を通ってゲレンデ７０へ圧送される。なお、氷
雪６０を圧送する際は、ブロア２を駆動して外部の空気
６５をエアフィルタ９を介して吸気管６内に吸入して圧
縮した後、送気管７を通して氷雪フィーダ３に該圧縮し
た空気６５を供給する。送気管７を通る空気６５は、ブ
ロア２により断熱圧縮されて昇温しているが、インター
クーラ等の熱交換器５により吸入以前の温度に戻して氷
雪フィーダ３へ供給して、氷雪フィーダ３において小塊
状の氷雪６０と空気６５を混合する。すると、空気６５
と混合した小塊状の氷雪６０は、圧送途上における氷雪
圧送管５０の内壁等と多数回衝突を繰り返すことによっ
て砕かれて小片化して、氷雪圧送管５０を通ってゲレン
デ７０に圧送される。氷雪圧送管５０には、開閉自在な
第１〜第ｎ取出口５１、５２、５３が、ゲレンデ７０を
構成する第１〜第ｎ散布区域７１、７２、７３に対応し
て設けられている。そこで、取出口５１、５２、５３
に、それぞれ散布ホース５５を接続し、各取出口５１、
５２、５３から散布ホース５５を介して、小片化した氷
雪６０を取り出し、散布ホース５５から氷雪６０を噴出
させる形で各散布区域７１、７２、７３に散布してい
た。2. Description of the Related Art FIG. 5 is a schematic view showing an example of conventional ice and snow spraying equipment. The conventional ice and snow spraying equipment 100X has, for example, as shown in FIG. 5, an ice making device 10, and the ice making device 10 includes the ice and snow pressure feeding device 1 and the ice and snow pressure feeding pipe 50.
Are provided to pump the ice and snow 60 manufactured and stored in the ice making device 10 to the slope 70. The ice making device 10 includes a water tank 11, a refrigerator 12, and an ice storage 13, while the ice and snow pressure feeding device 1 includes an air filter 9, an intake pipe 6, a blower 2, an air feeding pipe 7, a heat exchanger 5, It is composed of the ice and snow feeder 3 and the like. That is, by operating a valve or the like (not shown), the water 61 is supplied to and stored in the water storage tank 11, and when manufacturing the ice / snow 60, a pump or the like (not shown) is operated to freeze the water 61 in the water storage tank 11. Machine 12. The water 61 supplied to the refrigerator 12 is
At, the snow is manufactured into small pieces of ice and snow 60, and is transported to the ice storage 13 to store ice. And to the slope 70 ice 60
When it is necessary to spray the ice and snow 60, the ice and snow 60 is taken out from the ice storage 13 and supplied to the ice and snow feeder 3. Ice storage 1
The ice and snow 60 supplied from the ice / snow feeder 3 to the ice / snow feeder 3 is pressure-fed to the slope 70 through the ice / snow pressure feeding pipe 50. When the ice and snow 60 is pressure-fed, the blower 2 is driven to suck the external air 65 into the intake pipe 6 via the air filter 9 and compress it, and then the air and the pipe 7 is compressed to the ice and snow feeder 3. Air 65 is supplied. The air 65 passing through the air supply pipe 7 is adiabatically compressed by the blower 2 and is heated, but is returned to the temperature before intake by the heat exchanger 5 such as an intercooler and supplied to the ice and snow feeder 3, and the ice and snow feeder 3 is supplied. At, the small snow ice 60 and the air 65 are mixed. Then, the air 65
The small lump-shaped ice and snow 60 mixed with is crushed into small pieces by repeatedly colliding with the inner wall of the ice and snow pressure feeding pipe 50 many times during the pressure feeding, and is sent to the slope 70 through the ice and snow pressure feeding pipe 50. The ice-snow pressurizing pipe 50 is provided with openable and closable first to n-th outlets 51, 52 and 53 corresponding to the first to n-th spraying areas 71, 72 and 73 constituting the slope 70. Therefore, the outlets 51, 52, 53
To each of the outlets 51,
The small pieces of ice and snow 60 were taken out from 52 and 53 through the spraying hose 55, and were sprayed to the spraying areas 71, 72 and 73 in the form of ejecting the ice and snow 60 from the spraying hose 55.

【０００３】[0003]

【発明が解決しようとする課題】しかし、氷雪６０を氷
雪圧送管５０を通してゲレンデ７０に圧送する途上にお
いて、図５に示すように、氷雪フィーダ３を出た直後
や、ゲレンデ７０の第ｎ取出口５３の手前等において、
氷雪圧送管５０に上りの勾配が生じる上り勾配部５７が
形成されていると、該上り勾配部５７においては、氷雪
圧送管５０内を圧送される氷雪６０の重力による抵抗が
生じるので、氷雪圧送管５０の上り勾配部５７の上り口
５７ａには氷雪６０が詰り易かった。また、氷雪圧送管
５０の上り勾配部５７の上り口５７ａに氷雪６０が詰り
出して管内の圧力損失が大きくなると、上り勾配部５７
に流れる空気６５の圧力が低下し、上り勾配部５７を上
方に向けて圧送される途上の氷雪６０が、該上り勾配部
５７を上りきれず落下して逆流し、前記上り勾配部５７
の上り口５７ａにおける氷雪６０の詰りが増長され、急
激に氷雪圧送管５０内が閉塞されてしまっていた。これ
ら氷雪６０により氷雪圧送管５０内が閉塞されると、ゲ
レンデ７０には氷雪６０が供給されず、氷雪散布作業が
行なえなくなる。従って、氷雪散布作業を再開するため
には、それら氷雪圧送管５０内を閉塞した氷雪６０を取
除く必要があるが、氷雪圧送管５０内を閉塞した氷雪６
０を取除く作業は、時間及び手間が大変掛かっていた。
即ち、氷雪圧送管５０に氷雪６０が詰り氷雪圧送管５０
内が閉塞されると、ゲレンデ７０への氷雪散布作業が長
時間に亙り中断されるばかりか、氷雪圧送管５０内を閉
塞した氷雪６０を取除くために大変手間が掛かってい
た。However, as shown in FIG. 5, while the ice and snow 60 is being pressure-fed to the slope 70 through the ice-snow pressure-feeding pipe 50, as shown in FIG. 5, immediately after leaving the ice-snow feeder 3 or at the n-th outlet of the slope 70. In front of 53,
If an upslope portion 57 that causes an upslope is formed in the ice and snow pressure-feeding pipe 50, a resistance due to the gravity of the ice and snow 60 that is pressure-fed in the ice-snow pressure-feeding pipe 50 is generated in the upslope portion 57. It was easy for ice and snow 60 to be clogged in the ascending opening 57a of the ascending slope portion 57 of the pipe 50. Further, when the ice and snow 60 is clogged at the ascending port 57a of the ascending slope portion 57 of the ice and snow pumping pipe 50 and the pressure loss in the pipe becomes large, the ascending slope portion 57 is formed.
The pressure of the air 65 flowing to the upper part decreases, and the ice and snow 60 on the way that the upward slope part 57 is pumped upwards cannot fall up the upward slope part 57 and falls backward to flow backward.
The clogging of ice and snow 60 at the ascending opening 57a was increased, and the inside of the ice and snow pumping pipe 50 was suddenly blocked. If the ice and snow pressure-feeding pipe 50 is closed by the ice and snow 60, the ice and snow 60 is not supplied to the slope 70, and the ice and snow spraying work cannot be performed. Therefore, in order to restart the ice and snow spraying work, it is necessary to remove the ice and snow 60 that has blocked the inside of the ice and snow pumping pipe 50.
It took a lot of time and effort to remove 0.
That is, the ice and snow pumping pipe 50 is clogged with ice and snow 60, and
If the inside is blocked, not only the ice and snow spraying work on the slope 70 is interrupted for a long time, but also it takes a lot of time and effort to remove the ice and snow 60 that has blocked the inside of the ice and snow pumping pipe 50.

【０００４】そこで、本発明は、上記事情に鑑み、氷雪
圧送管５０等の配管を通して、人工的な雪である氷雪６
０をスキー場のゲレンデ７０に搬送する場合に、該配管
の上り勾配部５７の上り口５７ａにおいて氷雪が詰るこ
とを防止することが可能であり、かつ信頼性が高く保守
も容易な氷雪閉塞防止弁を提供することを目的とする。In view of the above situation, therefore, the present invention provides an ice snow 6 which is artificial snow through a pipe such as the ice snow pumping pipe 50.
When 0 is transported to the ski slope 70, it is possible to prevent ice and snow from clogging at the ascending opening 57a of the ascending slope portion 57 of the pipe, and it is highly reliable and easy to maintain. The purpose is to provide a valve.

【０００５】[0005]

【課題を解決するための手段】即ち、本発明のうち第１
の発明は、流入口（２１ｅ）と流出口（２１ｆ）を結ぶ
形で内部に氷雪流通空間（２１ａ）が形成された流通本
体（２１）を有し、前記流通本体に、前記氷雪流通空間
と外部を連通し得る吹出口（２１ｂ）を設けると共に、
前記流通本体に、前記氷雪流通空間と外部を連通し得る
排出口（２１ｃ）を設け、前記流通本体の吹出口に、該
吹出口を開口閉塞自在な第１の閉塞弁（２２）を、前記
吹出口を介して外部と前記流入口を連通し得る形で移動
駆動自在に設け、前記流通本体の排出口に、該排出口を
開口閉塞自在な第２の閉塞弁（２３）を、前記排出口を
介して外部と前記流出口を連通し得る形で移動駆動自在
に設け、更に、前記流通本体に、仕切弁（２３）を、前
記排出口を前記流入口から隔離し得る形で移動駆動自在
に設けて構成される。That is, the first of the present invention
The invention of claim 1 has a distribution main body (21) in which an ice and snow distribution space (21a) is formed so as to connect the inflow port (21e) and the outflow port (21f), and the distribution main body has the ice and snow distribution space. An air outlet (21b) that can communicate with the outside is provided, and
A discharge port (21c) that allows the ice and snow circulation space to communicate with the outside is provided in the circulation body, and a first blocking valve (22) that can open and close the blowout port is provided at the blowout port of the circulation body. A second closing valve (23), which is movably and drivably provided so that the outside and the inlet can communicate with each other through an outlet, and the outlet is opened and closed, is provided at the outlet of the flow main body. The outlet is provided so as to be able to communicate with the outside through the outlet so as to be movable, and a sluice valve (23) is further provided in the flow main body such that the outlet can be separated from the inlet. It is freely provided and configured.

【０００６】また、本発明のうち第２の発明は、第１の
発明において、前記第２の閉塞弁と前記仕切弁を、同一
の弁部材（２３）より形成して構成される。A second aspect of the present invention is the first aspect of the invention, wherein the second shutoff valve and the sluice valve are formed of the same valve member (23).

【０００７】なお、括弧内の番号は、図面における対応
する要素を示す便宜的なものであり、従って、本記述は
図面上の記載に限定拘束されるものではない。以下の
「作用」の欄についても同様である。The numbers in parentheses are for convenience of showing the corresponding elements in the drawings, and therefore, the present description is not limited to the description in the drawings. The same applies to the column of "action" below.

【０００８】[0008]

【作用】上記した構成により、本発明のうち第１の発明
は、本発明は、流入口（２１ｅ）より上流に詰った氷雪
を、流入口から、流出口（２１ｆ）及び排出口（２１
ｃ）を介さずに、吹出口（２１ｂ）を介して外部に吹出
させると共に、流出口から流通空間（２１ａ）に逆流す
る氷雪を、排出口を介して外部に排出させるように作用
する。また、本発明のうち第２の発明は、一つの弁部材
（２３）を操作することにより、排出口（２１ｃ）を介
して外部と流出口（２１ｆ）を連通し、かつ排出口を流
入口（２１ｅ）から隔離するように作用する。According to the first aspect of the present invention having the above-described structure, in the present invention, the ice and snow clogged upstream of the inflow port (21e) are discharged from the inflow port to the outflow port (21f) and the exhaust port (21).
It acts not only through c) but also through the outlet (21b) to the outside, and also discharges ice and snow flowing back from the outlet into the distribution space (21a) to the outside through the outlet. In the second aspect of the present invention, by operating one valve member (23), the outlet (21f) is communicated with the outside through the outlet (21c), and the outlet is connected to the inlet. It acts to isolate from (21e).

【０００９】[0009]

【実施例】以下、本発明の実施例を図面に基づき説明す
る。図１は、本発明による氷雪閉塞防止弁の詳細を示す
斜視図、図２は、図１に示した氷雪閉塞防止弁内を氷雪
が流れる一例を示す斜視図、図３は、図１に示した氷雪
閉塞防止弁が作動した一例を示す斜視図、図４は、図１
に示した氷雪閉塞防止弁が適用された氷雪散布設備の一
実施例を示す模式図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing details of the ice and snow blockage prevention valve according to the present invention, FIG. 2 is a perspective view showing an example of ice and snow flowing in the ice and snow blockage prevention valve shown in FIG. 1, and FIG. 3 is shown in FIG. FIG. 4 is a perspective view showing an example in which the ice and snow blockage prevention valve is operated, and FIG.
It is a schematic diagram which shows one Example of the ice and snow spraying equipment to which the ice and snow blockage prevention valve shown in FIG.

【００１０】本発明による氷雪閉塞防止弁２０は、図１
に示すように、全体が四角筒状の流通本体２１を有して
おり、流通本体２１内には、流通空間２１ａが形成され
ている。また、流通本体２１の図中左方には、円形状の
流入口２１ｅが流通本体２１の流通空間２１ａと外部を
連通する形で形成されており、流通本体２１の図中右方
には、円形状の流出口２１ｆが流通本体２１の流通空間
２１ａと外部を連通する形で形成されている。即ち、流
通本体２１の内部には、流通空間２１ａが、これら流入
口２１ｅと流出口２１ｆを結ぶ形で形成されている。ま
た、流通空間２１ａは、氷雪６０が詰り難いように流入
口２１ｅから拡大し流出口２１ｆへと縮小する形で形成
されている。更に、これら流入口２１ｅと流出口２１ｆ
は、氷雪圧送管５０を分離した分離段部５０ａ、５０ｂ
と接続自在に形成されている。The ice and snow blockage prevention valve 20 according to the present invention is shown in FIG.
As shown in FIG. 2, the whole has a square tube-shaped distribution body 21, and a distribution space 21 a is formed in the distribution body 21. Further, a circular inlet 21e is formed on the left side of the distribution body 21 in the drawing so as to communicate with the outside of the distribution space 21a of the distribution body 21, and on the right side of the distribution body 21 in the drawing, The circular outlet 21f is formed so as to communicate the circulation space 21a of the circulation body 21 with the outside. That is, inside the circulation main body 21, a circulation space 21a is formed in a shape that connects the inflow port 21e and the outflow port 21f. Further, the distribution space 21a is formed in such a manner that it expands from the inflow port 21e and contracts to the outflow port 21f so that the ice and snow 60 is less likely to be blocked. Furthermore, these inlet 21e and outlet 21f
Are separation step portions 50a and 50b in which the ice and snow pressure-feeding pipe 50 is separated.
It is formed to be connectable with.

【００１１】また、流通本体２１の上面には、図１に示
すように、流通空間２１ａと外部を連通し得る四角形状
の吹出口２１ｂが設けられており、吹出口２１ｂには、
吹出口２１ｂの形状に対応して四角板状に形成された上
部閉塞弁体２２が、ヒンジ部２２ａ回りに矢印Ｃ、Ｄ方
向に移動自在に設けられている。即ち、吹出口２１ｂに
は、吹出口２１ｂを開口閉塞自在な上部閉塞弁体２２が
設けられており、上部閉塞弁体２２を矢印Ｃ方向に移動
させることにより、吹出口２１ｂが開口して、流入口２
１ｅと外部とが吹出口２１ｂを介して連通される。ま
た、上部閉塞弁体２２の上面側部には、ブラケット２
５、２５が設けられており、上部閉塞弁体２２には、後
述する駆動制御装置３０を構成する突出後退駆動自在な
開閉ジャッキ３２、３２が、これらブラケット２５、２
５に枢着される形で装着されている。これら開閉ジャッ
キ３２、３２の他端は、それぞれ流通本体２１の側面２
１ｄ、２１ｄに、各開閉ジャッキ３２が上下方向に突出
後退し得るように枢着されている。即ち、これら開閉ジ
ャッキ３２、３２を突出させることにより、上部閉塞弁
体２２が矢印Ｃ方向に移動して吹出口２１ｂが開口し、
流入口２１ｅと外部とが吹出口２１ｂを介して連通され
る。一方、これら開閉ジャッキ３２、３２を後退させる
ことにより、上部閉塞弁体２２が矢印Ｄ方向に移動して
吹出口２１ｂが閉塞される。Further, as shown in FIG. 1, on the upper surface of the circulation main body 21, there is provided a quadrangular outlet 21b capable of communicating the circulation space 21a with the outside.
An upper closing valve body 22 formed in a rectangular plate shape corresponding to the shape of the outlet 21b is provided around the hinge portion 22a so as to be movable in the directions of arrows C and D. That is, the air outlet 21b is provided with an upper closing valve body 22 capable of opening and closing the air outlet 21b, and by moving the upper closing valve body 22 in the direction of arrow C, the air outlet 21b opens. Inlet 2
1e communicates with the outside via the outlet 21b. Further, the bracket 2 is provided on the upper surface side portion of the upper block valve body 22.
5 and 25 are provided, and the upper closing valve body 22 is provided with opening / closing jacks 32 and 32, which constitute a drive control device 30 described later, and which can be driven to project and retract.
It is attached so that it is pivotally attached to 5. The other ends of the opening / closing jacks 32, 32 are respectively provided on the side surface 2 of the distribution main body 21.
Each of the opening / closing jacks 32 is pivotally attached to 1d and 21d so as to project and retract in the vertical direction. That is, by projecting the opening / closing jacks 32, 32, the upper closing valve body 22 moves in the direction of arrow C to open the air outlet 21b,
The inflow port 21e and the outside are communicated with each other via the air outlet port 21b. On the other hand, by retracting the opening / closing jacks 32, 32, the upper closing valve body 22 moves in the direction of arrow D to close the air outlet 21b.

【００１２】更に、流通本体２１の下面には、図１に示
すように、流通空間２１ａと外部を連通し得る四角形状
の排出口２１ｃが吹出口２１ｂと対向する形で設けられ
ており、排出口２１ｃには、排出口２１ｃの形状に対応
して（但し、長手方向（矢印Ａ、Ｂ方向）には若干長
く）四角板状に形成された下部閉塞仕切弁体２３が、ヒ
ンジ部２３ａ回りに矢印Ｃ、Ｄ方向に移動自在に設けら
れている。即ち、排出口２１ｃには、排出口２１ｃを開
口閉塞自在な下部閉塞仕切弁体２３が設けられており、
下部閉塞仕切弁体２３を矢印Ｃ方向に移動させることに
より、下部閉塞仕切弁体２３は、流通空間２１ａを斜め
に仕切る形となり、排出口２１ｃが開口して、流出口２
１ｆと外部とが排出口２１ｃを介して連通され、かつ排
出口２１ｃが流入口２１ｅから隔離される。また、下部
閉塞仕切弁体２３と上部閉塞弁体２２との間には、連結
棒２４、２４が、下部閉塞仕切弁体２３と上部閉塞弁体
２２とを接続する形で枢着されており、下部閉塞仕切弁
体２３は、連結棒２４、２４を介して、上部閉塞弁体２
２が吹出口２１ｂを開口閉塞する動きと連動して、排出
口２１ｃを開口閉塞する。即ち、開閉ジャッキ３２、３
２を突出後退駆動させることにより、上部閉塞弁体２２
及び下部閉塞仕切弁体２３が矢印Ｃ、Ｄ方向に移動駆動
して、吹出口２１ｂ及び排出口２１ｃが開口閉塞され
る。Further, as shown in FIG. 1, on the lower surface of the distribution main body 21, there is provided a rectangular discharge port 21c capable of communicating the distribution space 21a with the outside so as to face the blowout port 21b. At the outlet 21c, a lower closing sluice valve body 23 formed in a square plate shape corresponding to the shape of the discharge outlet 21c (however, slightly longer in the longitudinal direction (arrow A, B direction)) is provided around the hinge portion 23a. Is provided movably in the directions of arrows C and D. That is, the discharge port 21c is provided with a lower closing sluice valve body 23 capable of closing the discharge port 21c.
By moving the lower closing sluice valve body 23 in the direction of the arrow C, the lower closing sluice valve body 23 is divided into the distribution space 21a at an angle, the discharge port 21c is opened, and the outlet port 2 is opened.
If is communicated with the outside via the outlet 21c, and the outlet 21c is isolated from the inlet 21e. Further, connecting rods 24, 24 are pivotally mounted between the lower closing sluice valve body 23 and the upper closing valving valve body 22 so as to connect the lower closing sluice valve body 23 and the upper occluding valve body 22. The lower block valve body 23 is connected to the upper block valve body 2 via the connecting rods 24, 24.
Interlocking with the movement of 2 to open and close the outlet 21b, the outlet 21c is opened and closed. That is, the opening / closing jacks 32, 3
2 is driven to project and retreat, so that the upper closing valve body 22
The lower closing sluice valve element 23 is driven to move in the directions of arrows C and D, and the air outlet 21b and the outlet 21c are opened and closed.

【００１３】また、氷雪閉塞防止弁２０は、図１に示す
ように、駆動制御装置３０を有しており、駆動制御装置
３０は、油圧源ユニット３１、開閉ジャッキ３２、制御
ユニット３３、圧力センサ３４等から構成される。即
ち、駆動制御装置３０は、突出後退駆動自在な油圧ジャ
ッキから成る開閉ジャッキ３２、３２を有しており、開
閉ジャッキ３２、３２には、アキュムレータ、リザー
バ、油圧ポンプ、電磁弁等から成る油圧源ユニット３１
が、各開閉ジャッキ３２に対して油圧供給自在に接続さ
れている。油圧源ユニット３１には、制御ユニット３３
が、油圧源ユニット３１から各開閉ジャッキ３２に対し
て供給する油圧を制御する形で接続されており、制御ユ
ニット３３には、氷雪圧送管５０内の圧力を検出し得る
圧力センサ３４が接続されている。また、制御ユニット
３３には、開閉ジャッキ３２を作動させるべき（即ち、
氷雪閉塞防止弁２０を作動させるべき）氷雪圧送管５０
内の管内圧力である設定値ＰＳを入力し得る操作部３３
ａが設けられており、制御ユニット３３は、圧力センサ
３４が検出する測定値ＰＭと、操作部３３ａを介して入
力された設定値ＰＳを比較して、これら測定値ＰＭと設
定値ＰＳとの比較結果に基づいて、油圧源ユニット３１
から各開閉ジャッキ３２に対する油圧供給を制御する。
即ち、測定値ＰＭが設定値ＰＳを上回った場合に、油圧
源ユニット３１から各開閉ジャッキ３２に対して油圧を
供給し、各開閉ジャッキ３２を突出させる（即ち、氷雪
閉塞防止弁２０を作動させる）。As shown in FIG. 1, the ice / snow blockage prevention valve 20 has a drive control device 30, and the drive control device 30 includes a hydraulic power source unit 31, an opening / closing jack 32, a control unit 33, and a pressure sensor. It is composed of 34 and the like. That is, the drive control device 30 has opening / closing jacks 32, 32 formed by hydraulic jacks that can be driven to project and retract, and the opening / closing jacks 32, 32 include a hydraulic source including an accumulator, a reservoir, a hydraulic pump, an electromagnetic valve, and the like. Unit 31
However, the hydraulic pressure is freely connected to each opening / closing jack 32. The hydraulic power source unit 31 includes a control unit 33.
Are connected to control the hydraulic pressure supplied from the hydraulic pressure source unit 31 to the opening / closing jacks 32, and the control unit 33 is connected to a pressure sensor 34 capable of detecting the pressure in the ice and snow pressure feed pipe 50. ing. Further, the control unit 33 should operate the opening / closing jack 32 (that is,
The ice and snow blockage prevention valve 20 should be operated)
Operation part 33 capable of inputting a set value PS which is the internal pressure in the pipe
a is provided, the control unit 33 compares the measured value PM detected by the pressure sensor 34 with the set value PS input via the operation unit 33a, and compares the measured value PM and the set value PS with each other. Based on the comparison result, the hydraulic power source unit 31
Controls the hydraulic pressure supply to each opening / closing jack 32.
That is, when the measured value PM exceeds the set value PS, the hydraulic pressure is supplied from the hydraulic power source unit 31 to each opening / closing jack 32 so that each opening / closing jack 32 is projected (that is, the ice and snow blockage prevention valve 20 is operated. ).

【００１４】本発明による氷雪閉塞防止弁２０は以上の
ような構成を有するので、氷雪閉塞防止弁２０が適用さ
れた氷雪散布設備１００は、図５に示す従来の氷雪散布
設備１００Ｘにおける氷雪圧送管５０の上り勾配部５７
の上り口５７ａに、本発明による氷雪閉塞防止弁２０を
設けて構成される。即ち、氷雪散布設備１００を構成す
る氷雪圧送管５０の各上り勾配部５７の上り口５７ａに
おいて、氷雪圧送管５０を、上流（矢印Ｂ方向）の分離
端部５０ａと下流（矢印Ａ方向）の分離端部５０ｂを形
成する形で分離し、該氷雪圧送管５０を分離して形成し
た分離端部５０ａ、５０ｂの間に、図２乃至図４に示す
ように、本発明による氷雪閉塞防止弁２０を、氷雪搬送
方向（矢印Ａ、Ｂ方向）に対応させて、流入口２１ｅ
（矢印Ｂ方向）から流出口２１ｆ（矢印Ａ方向）に向け
て氷雪６０が搬送され得るように、これら流入口２１ｅ
及び流出口２１ｆに、分離した氷雪圧送管５０の分離端
部５０ａ、５０ｂをそれぞれ接続する。また、各氷雪閉
塞防止弁２０の駆動制御装置３０の圧力センサ３４は、
氷雪圧送管５０の上り勾配部５７の上り口５７ａで氷雪
６０が詰りそうな位置よりも上流側に、即ち、流入口２
１ｅに接続された氷雪圧送管５０側で氷雪６０が詰りそ
うな位置よりも上流に、管内圧力を検出し得るように取
付ける。更に、各氷雪閉塞防止弁２０の駆動制御装置３
０の制御ユニット３３に対しては、操作部３３ａを介し
て、各圧力センサ３４を取付けた、上り勾配部５７の上
り口５７ａにおける氷雪圧送管５０内の定常圧力Ｐ０に
対応した設定値ＰＳ（即ち、定常圧力Ｐ０に若干の圧力
増分ＤＰを加えた値）を入力する。なお、氷雪閉塞防止
弁２０が適用された氷雪散布設備１００の構成におい
て、図５に示す従来の氷雪散布設備１００Ｘを構成する
ものと同じもの、即ち、製氷装置１０及び氷雪圧送装置
１については、「従来の技術」において詳述したので、
ここでは説明を省略し、同一の部品番号を付して使用す
る。Since the ice and snow blockage prevention valve 20 according to the present invention has the above-mentioned structure, the ice and snow spraying equipment 100 to which the ice and snow blockage prevention valve 20 is applied is the ice and snow spraying pipe in the conventional ice and snow spraying equipment 100X shown in FIG. 50 uphill section 57
The ice / snow blockage prevention valve 20 according to the present invention is provided at the ascent port 57a. That is, at the ascending port 57a of each ascending slope portion 57 of the ice and snow spraying pipe 50 that constitutes the ice and snow spraying facility 100, the ice and snow pumping pipe 50 is connected to the upstream (arrow B direction) separation end 50a and the downstream (arrow A direction). As shown in FIGS. 2 to 4, the ice / snow blockage prevention valve according to the present invention is provided between the separation ends 50a and 50b formed by separating the ice / snow pumping pipe 50 so as to form the separation end 50b. 20 is made to correspond to the ice and snow transport direction (arrow A, B direction), and the inflow port 21e
These inflow ports 21e are arranged so that the ice and snow 60 can be conveyed from (the direction of arrow B) toward the outflow port 21f (direction of the arrow A).
The separated ends 50a and 50b of the separated ice and snow pressure-feeding pipe 50 are connected to the and the outlet 21f. Further, the pressure sensor 34 of the drive control device 30 of each ice and snow blockage prevention valve 20 is
The upstream side of the position where the ice / snow 60 is likely to be clogged at the upslope 57a of the upslope portion 57 of the ice / snow pumping pipe 50, that is, the inflow port 2
It is attached upstream of a position where ice and snow 60 is likely to be clogged on the ice and snow pressure feeding pipe 50 side connected to 1e so as to detect the pipe internal pressure. Further, the drive control device 3 for each ice and snow blockage prevention valve 20.
For the control unit 33 of 0, the set value PS (corresponding to the steady pressure P0 in the snow and snow pressure feed pipe 50 at the upslope 57a of the upslope 57, to which each pressure sensor 34 is attached via the operation unit 33a, That is, a value obtained by adding a slight pressure increment DP to the steady pressure P0) is input. In addition, in the structure of the ice and snow spraying equipment 100 to which the ice and snow blockage prevention valve 20 is applied, the same as that of the conventional ice and snow spraying equipment 100X shown in FIG. 5, that is, the ice making device 10 and the ice and snow pumping device 1, As detailed in "Prior Art",
Here, the description is omitted and the same part numbers are used.

【００１５】そして、本発明による氷雪閉塞防止弁２０
が適用された氷雪散布設備１００により、スキー場のゲ
レンデに人工雪である氷雪６０を散布する際には、ま
ず、各氷雪閉塞防止弁２０は、図２に示すように、各氷
雪閉塞防止弁２０の駆動制御装置３０の開閉ジャッキ３
２、３２を後退させて、上部閉塞弁体２２及び下部閉塞
仕切弁体２３により吹出口２１ｂ及び排出口２１ｃをそ
れぞれ閉塞した状態で、即ち、流入口２１ｅと流出口２
１ｆが流通空間２１を介して接続した状態としておく。
次に、各氷雪閉塞防止弁２０の駆動制御装置３０を作動
させると、各駆動制御装置３０の圧力センサ３４が、各
上り勾配部５７の上り口５７ａにおける氷雪圧送管５０
内の圧力の検出を開始し、各制御ユニット３３は、操作
部３３ａを介して入力された設定値ＰＳと該圧力センサ
３４が検出する管内圧力の測定値ＰＭとの比較を開始す
る。そして、各制御ユニット３３は、各制御ユニット３
３の圧力センサ３４が検出する測定値ＰＭが、それら圧
力センサ３４が取付けられた上り口５７ａにおける氷雪
圧送管５０内の定常圧力Ｐ０に対応して設定された各設
定値ＰＳよりも小さいと判断し、油圧源ユニット３１か
ら開閉ジャッキ３２、３２に対して油圧は供給せず、油
圧源ユニット３１の図示しない電磁弁等を閉めて開閉ジ
ャッキ３２、３２をハイドロロックした状態とする。Then, the ice and snow blockage prevention valve 20 according to the present invention.
When ice-snow 60, which is artificial snow, is sprayed on the slopes of a ski resort by the ice-snow spraying equipment 100 to which the above-mentioned method is applied, first, the ice-snow blockage prevention valves 20 are provided as shown in FIG. Opening / closing jack 3 of drive control device 30 of 20
2 and 32 are retracted, and the air outlet 21b and the outlet 21c are closed by the upper closing valve body 22 and the lower closing gate valve body 23, that is, the inlet 21e and the outlet 2
The 1f is connected via the distribution space 21.
Next, when the drive control device 30 of each ice and snow blockage prevention valve 20 is operated, the pressure sensor 34 of each drive control device 30 causes the ice and snow pressure feed pipe 50 at the ascending port 57a of each ascending slope portion 57 to operate.
Then, each control unit 33 starts to compare the set value PS input via the operation unit 33a with the measured value PM of the in-pipe pressure detected by the pressure sensor 34. Then, each control unit 33 corresponds to each control unit 3
It is determined that the measurement value PM detected by the pressure sensor 34 of No. 3 is smaller than each set value PS set corresponding to the steady pressure P0 in the ice and snow pressure feed pipe 50 at the upsout 57a to which the pressure sensors 34 are attached. However, the hydraulic pressure is not supplied from the hydraulic power source unit 31 to the open / close jacks 32, 32, and the open / close jacks 32, 32 are hydrolocked by closing an unillustrated solenoid valve or the like of the hydraulic power source unit 31.

【００１６】次に、製氷装置１０に貯蔵された小塊状の
氷雪６０を、図示しないコンベアにより氷雪フィーダ３
へ搬送して、氷雪圧送装置１に、これら搬送された小塊
状の氷雪６０を散雪原料として、氷雪フィーダ３の氷雪
取込口３ａを介して供給する。すると、氷雪フィーダ３
において、氷雪圧送装置１のブロア２から供給される空
気６５と製氷装置１０から供給される散雪原料である小
塊状の氷雪６０とが混合するので、該氷雪６０は、空気
６５に圧送される形で氷雪圧送管５０内を氷雪６０同
志、管壁等との衝突により細かく砕かれつつ搬送され
る。そこで、これら小片化した氷雪６０を、氷雪圧送管
５０の各取出口５１、５２、５３に装着した散布ホース
５５を介して取り出すと、氷雪６０は、散布ホース５５
から噴出されて、ゲレンデ７０の各散布区域７１、７
２、７３に、小片化した氷雪６０を散布することができ
るので、スキー板の滑走に適した雪質のゲレンデ７０を
形成することが可能である。Next, the small pieces of ice and snow 60 stored in the ice making device 10 are supplied to the ice and snow feeder 3 by a conveyor (not shown).
To the ice-snow pressure-feeding device 1, and the small-sized ice-snow 60 thus transported is supplied as a snow-spreading material through the ice-snow intake port 3a of the ice-snow feeder 3. Then, the ice and snow feeder 3
In the above, since the air 65 supplied from the blower 2 of the ice and snow pumping device 1 and the small lump-shaped ice and snow 60 which is the snow-spraying material supplied from the ice making device 10 are mixed, the ice and snow 60 is pumped to the air 65. In the shape of the ice-snow pressure-feeding pipe 50, the ice-snow 60 is conveyed while being finely crushed by collision with the ice-snow 60 and the pipe wall. Therefore, when these small pieces of ice and snow 60 are taken out through the spraying hoses 55 attached to the respective outlets 51, 52, 53 of the ice and snow pumping pipe 50, the ice and snow 60 becomes the spraying hose 55.
Sprayed from each of the spray areas 71, 7 of the slope 70
Since the small pieces of ice and snow 60 can be sprayed on 2, 73, it is possible to form a snowy slope 70 suitable for skiing.

【００１７】ところで、このようにしてゲレンデ７０へ
の氷雪散布作業を実施している際に、氷雪圧送管５０内
をゲレンデ７０に氷雪６０を搬送する途上において、氷
雪圧送管５０の上り勾配部５７の上り口５７ａ、即ち、
図３に示すように、流入口２１ｅに接続された氷雪圧送
管５０の分離端部５０ａ近傍に氷雪６０が詰りだし、該
分離端部５０ａ近傍において詰った氷雪６０Ｓが形成さ
れ始めた場合を仮定する。なお、氷雪閉塞防止弁２０の
流通空間２１ａは、氷雪６０が流入する流入口２１ｅか
ら拡大する形で形成されているので、氷雪６０は詰り難
い。すると、氷雪圧送管５０内のうち、この詰った氷雪
６０Ｓよりも上流側、即ち、反氷雪搬送方向（矢印Ｂ方
向）側の管内圧力が上昇する。制御ユニット３３は、圧
力センサ３４が検出する測定値ＰＭと、操作部３３ａを
介して入力された設定値ＰＳを常時比較しており、測定
値ＰＭが設定値ＰＳよりも小さいと判断すると、油圧源
ユニット３１から開閉ジャッキ３２、３２に対して油圧
は供給せず、開閉ジャッキ３２、３２を後退させてハイ
ドロロックした状態を保持する。そして、前記分離端部
５０ａ近傍に詰った氷雪６０Ｓが更に大きく形成され
て、該氷雪圧送管５０の上り勾配部５７の上り口５７ａ
内の圧力が更に上昇し、制御駆動装置３０の圧力センサ
３４が検出する測定値ＰＭが、操作部３３ａを介して入
力された設定値ＰＳよりも上回ると、これら測定値ＰＭ
と設定値ＰＳとの比較を続けていた制御ユニット３３
は、該測定値ＰＭが設定値ＰＳを上回ったと判断して、
油圧源ユニット３１から開閉ジャッキ３２、３２に対し
て油圧を供給し、開閉ジャッキ３２、３２を突出させ
る。By the way, when the ice and snow spraying work is carried out on the slope 70 in this way, while the ice and snow 60 is being conveyed to the slope 70 in the ice and snow supply pipe 50, the upslope portion 57 of the ice and snow supply pipe 50. 57a, that is,
As shown in FIG. 3, it is assumed that ice / snow 60 starts to clog near the separation end 50a of the ice / snow pumping pipe 50 connected to the inflow port 21e, and clogged ice / snow 60S starts to form near the separation end 50a. To do. Since the distribution space 21a of the ice and snow blockage prevention valve 20 is formed so as to expand from the inflow port 21e into which the ice and snow 60 flows, the ice and snow 60 is hard to be clogged. Then, in the ice and snow pressure-feeding pipe 50, the pipe pressure on the upstream side of the clogged ice and snow 60S, that is, on the anti-ice-and-snow transport direction (arrow B direction) side increases. The control unit 33 constantly compares the measured value PM detected by the pressure sensor 34 with the set value PS input via the operation unit 33a, and when it judges that the measured value PM is smaller than the set value PS, the hydraulic pressure No hydraulic pressure is supplied from the power source unit 31 to the opening / closing jacks 32, 32, and the opening / closing jacks 32, 32 are retracted to maintain a hydrolocked state. Then, ice and snow 60S clogging near the separation end portion 50a is formed to be larger, and the ascending port 57a of the ascending slope portion 57 of the ice and snow pressure feeding pipe 50 is formed.
When the internal pressure further rises and the measured value PM detected by the pressure sensor 34 of the control drive device 30 exceeds the set value PS input via the operation unit 33a, these measured values PM
And the control unit 33 that continued to compare the set value PS with the set value PS.
Judges that the measured value PM exceeds the set value PS,
Hydraulic pressure is supplied from the hydraulic power source unit 31 to the opening / closing jacks 32, 32 to cause the opening / closing jacks 32, 32 to project.

【００１８】すると、図３に示すように、上部閉塞弁体
２２が矢印Ｃ方向に移動すると共に、下部閉塞仕切弁体
２３が、連結棒２４、２４を介して、上部閉塞弁体２２
が矢印Ｃ方向に移動することに連動して矢印Ｃ方向に移
動して、即ち、上部閉塞弁体２２及び下部閉塞仕切弁体
２３が矢印Ｃ方向に移動して、吹出口２１ｂ及び排出口
２１ｃが開口される。そして、閉塞防止弁２０の流入口
２１ｅと外部が吹出口２１ｂを介して連通すると共に、
閉塞防止弁２０の流出口２１ｆと外部が排出口２１ｃを
介して連通し、かつ流出口２１ｆ及び排出口２１ｃが流
入口２１ｅから隔離される。Then, as shown in FIG. 3, the upper closing valve body 22 moves in the direction of the arrow C, and the lower closing gate valve body 23 moves the upper closing valve body 22 through the connecting rods 24, 24.
Moves in the direction of arrow C in conjunction with the movement of arrow in the direction of arrow C, that is, the upper closing valve body 22 and the lower closing partition valve body 23 move in the direction of arrow C, and the outlet 21b and the outlet 21c. Is opened. Then, while the inflow port 21e of the blockage prevention valve 20 and the outside communicate with each other through the air outlet port 21b,
The outlet 21f of the blocking valve 20 and the outside communicate with each other via the outlet 21c, and the outlet 21f and the outlet 21c are isolated from the inlet 21e.

【００１９】これにより、流入口２１ｅ側は、管内抵抗
の大きい上り勾配部５７から外されて、吹出口２１ｂを
介して外部と連通して管内抵抗が急激に減少するので、
詰った氷雪６０Ｓは、図３に示すように、氷雪搬送装置
１のブロア２から供給され続けられている空気６５によ
り圧送される形で、上部閉塞弁体２２及び下部閉塞仕切
弁体２３間にガイドされつつこれら流入口２１ｅ及び吹
出口２１ｂを介して外部に吹き出される。一方、流出口
２１ｆ及び排出口２１ｃが流入口２１ｅから隔離される
ので、流入口２１ｅから上り勾配部５７には氷雪６０圧
送用の空気６５が供給されず、上り勾配部５７を上方に
向けて圧送される途上であった氷雪６０は、該上り勾配
部５７を落下して流通空間２１ａに逆流するが、該上り
勾配部５７の最下方では流出口２１ｆと外部が排出口２
１ｃを介して連通しているので、それら逆流する氷雪６
０は、図３に示すように、上り勾配部５７や流通空間２
１ａに詰ること無く、流出口２１ｆ及び排出口２１ｃを
介して外部に排出される。As a result, the inflow port 21e side is removed from the upslope portion 57 having a large in-pipe resistance and communicates with the outside through the blow-out port 21b, so that the in-pipe resistance sharply decreases.
As shown in FIG. 3, the blocked ice / snow 60S is pressure-fed by the air 65 which is continuously supplied from the blower 2 of the ice / snow transport device 1, and is fed between the upper closed valve body 22 and the lower closed gate valve body 23. While being guided, it is blown out to the outside through the inlet 21e and the outlet 21b. On the other hand, since the outflow port 21f and the discharge port 21c are separated from the inflow port 21e, the air 65 for pumping ice and snow 60 is not supplied from the inflow port 21e to the upslope portion 57, and the upslope portion 57 is directed upward. The ice and snow 60 that was being sent under pressure falls down the upslope portion 57 and flows back into the circulation space 21a, but at the lowermost part of the upslope portion 57, the outlet 21f and the outside are the discharge ports 2.
Since they communicate with each other via 1c, the ice and snow that flow backwards 6
As shown in FIG. 3, 0 indicates the upslope portion 57 and the distribution space 2
It is discharged to the outside through the outlet 21f and the outlet 21c without clogging the 1a.

【００２０】やがて、氷雪圧送管５０の上り勾配部５７
の上り口５７ａ、即ち、図３に示す流入口２１ｅに接続
された氷雪圧送管５０の分離端部５０ａ近傍に詰った氷
雪６０Ｓが外部に吹き出されて、該分離端部５０ａ近傍
での氷雪６０の詰りが解消されるにつれて、測定値ＰＭ
と設定値ＰＳの比較を常時行っている制御ユニット３３
が、圧力センサ３４が検出する測定値ＰＭが、操作部３
３ａを介して入力された設定値ＰＳよりも小さいと判断
すると、油圧源ユニット３１から開閉ジャッキ３２、３
２に対する油圧の供給を停止すると共に、油圧源ユニッ
ト３１の図示しない電磁弁等を適宜開閉して、これら開
閉ジャッキ３２、３２を後退させる。すると、上部閉塞
弁体２２及び下部閉塞仕切弁体２３は、図２に示すよう
に、矢印Ｄ方向に移動して、吹出口２１ｂ及び排出口２
１ｃをそれぞれ閉塞する。そこで、制御ユニット３３
は、上部閉塞弁体２２及び下部閉塞仕切弁体２３により
吹出口２１ｂ及び排出口２１ｃをそれぞれ閉塞した状態
で、即ち、流入口２１ｅと流出口２１ｆが流通空間２１
を介して接続した状態で、油圧源ユニット３１の図示し
ない電磁弁等を閉めて開閉ジャッキ３２、３２をハイド
ロロックした状態とし、氷雪閉塞防止弁２０の復帰を完
了する。Eventually, the upslope portion 57 of the ice and snow pressure-feeding pipe 50.
Ice 57S in the vicinity of the separation end 50a of the ice snow pumping pipe 50 connected to the inflow port 57a of FIG. 3, that is, the ice and snow 60S in the vicinity of the separation end 50a. As the clogging of the
And the control unit 33 that constantly compares the set value PS with the set value PS.
However, the measured value PM detected by the pressure sensor 34 is
If it is determined that the value is smaller than the set value PS input via 3a, the hydraulic power source unit 31 opens and closes the opening / closing jacks 32, 3
The supply of the hydraulic pressure to the hydraulic pressure source 2 is stopped, and the solenoid valve (not shown) of the hydraulic pressure source unit 31 is appropriately opened / closed to retract the open / close jacks 32, 32. Then, the upper closing valve body 22 and the lower closing gate valve body 23 move in the arrow D direction as shown in FIG.
1c is closed respectively. Therefore, the control unit 33
Is in a state in which the outlet 21b and the outlet 21c are closed by the upper closing valve body 22 and the lower closing partition valve body 23, that is, the inflow port 21e and the outflow port 21f are in the distribution space 21.
In the state in which the open / close jacks 32, 32 are hydrolocked by closing a solenoid valve or the like (not shown) of the hydraulic power source unit 31 in a state of being connected via the above, the return of the ice and snow blockage prevention valve 20 is completed.

【００２１】以上のように、氷雪６０を氷雪圧送管５０
を通してゲレンデ７０に圧送する途上において、氷雪６
０が詰り易い氷雪圧送管５０の上り勾配部５７の上り口
５７ａに氷雪６０が詰りだしても、該上り勾配部５７の
上り口５７ａに設けられた氷雪閉塞防止弁２０が、駆動
制御装置３０を作動させて、上部閉塞弁体２２により吹
出口２１ｂを介して流入口２１ｅと外部を連通し、ま
た、下部閉塞仕切弁体２３により排出口２１ｃを介して
流出口２１ｆと外部を連通し、かつ排出口２１ｃを流入
口２１ｅから隔離することにより、氷雪６０（６０Ｓ）
を、流入口２１ｅから、流出口２１ｆ及び排出口２１ｃ
を介さずに、吹出口２１ｂを介して外部に吹出させると
共に、上り勾配部５７を落下し、流出口２１ｆから流通
空間２１ａに逆流する氷雪６０を、排出口２１ｃを介し
て外部に排出させることができるので、氷雪圧送管５０
内は氷雪６０により閉塞されない。また、下部閉塞仕切
弁体２３という一つの弁部材を操作することにより、排
出口２１ｃを介して外部と流出口２１ｆを連通し、かつ
排出口２１ｃを流入口２１ｅから隔離することができる
ので、氷雪閉塞防止弁２０の構造が簡単になり信頼性が
向上し、また保守も容易になる。従って、氷雪閉塞防止
弁２０は、氷雪圧送管５０等の配管を通して、人工的な
雪である氷雪６０をスキー場のゲレンデ７０に搬送する
場合に、該配管の上り勾配部５７の上り口５７ａにおい
て氷雪が詰ることを防止することが可能であり、かつ信
頼性が高く保守も容易である。As described above, the ice / snow 60 is transferred to the ice / snow pressure feed pipe 50.
On the way to the slope 70 under pressure through ice and snow 6
Even if ice / snow 60 starts to clog the upslope 57a of the upslope portion 57 of the ice / snow pressure-feeding pipe 50 where 0 is easily blocked, the ice / snow blockage prevention valve 20 provided at the upsout 57a of the upslope portion 57 causes the drive control device 30 to operate. Is operated to communicate the inlet 21e with the outside through the outlet 21b by the upper closing valve body 22, and the outlet 21f with the outside through the outlet 21c by the lower closing partition valve body 23, And by separating the discharge port 21c from the inflow port 21e, ice and snow 60 (60S)
From the inlet 21e to the outlet 21f and the outlet 21c.
Not through the outlet 21b, but also through the outlet 21b to the outside, and at the same time, the upslope portion 57 is dropped, and the ice and snow 60 that flows back from the outlet 21f into the circulation space 21a is discharged to the outside via the outlet 21c. Because it is possible, ice and snow pressure feed pipe 50
The inside is not blocked by ice and snow 60. In addition, by operating one valve member called the lower closing sluice valve body 23, the outside can be communicated with the outside through the outlet 21c and the outlet 21c can be isolated from the inlet 21e. The structure of the ice and snow blockage prevention valve 20 is simplified, reliability is improved, and maintenance is facilitated. Therefore, when the ice-snow blockage prevention valve 20 conveys ice-snow 60, which is artificial snow, to the slope 70 of a ski resort through a pipe such as the ice-snow pressure-feeding pipe 50, the ice-snow blockage valve 20 is provided at the ascent 57a of the ascending slope portion 57 of the pipe. It is possible to prevent ice and snow from clogging, and it is highly reliable and easy to maintain.

【００２２】また、制御ユニット３３の操作部３３ａを
介して任意の設定値ＰＳを入力して、閉塞検知弁２０が
作動する圧力を任意に設定できるので、各閉塞検知弁２
０が装着された位置に対応して各閉塞検知弁２０が精度
良く作動するように、閉塞検知弁２０が設けられた氷雪
圧送管５０の上り勾配部５７の上り口５７ａにおける管
内の定常圧力に対応させて設定値ＰＳを入力することが
でき、各閉塞検知弁２０を確実に作動させて、氷雪６０
が詰った場所を確実に検知することができる。更に、氷
雪閉塞防止弁２０が作動している間は、氷雪散布作業が
一時的に中断されるが、氷雪搬送装置１のブロア２を停
止させる必要がないので、氷雪６０の詰りが解消されて
氷雪閉塞防止弁２０が復帰次第、直ちに氷雪散布作業は
再開することが可能となり、都合が良い。Further, the pressure at which the blockage detection valve 20 operates can be arbitrarily set by inputting an arbitrary set value PS via the operation portion 33a of the control unit 33, so that each blockage detection valve 2
The steady pressure in the pipe at the ascending port 57a of the ascending slope portion 57 of the ice and snow pressure feed pipe 50 provided with the obstruction detection valve 20 is adjusted so that each obstruction detection valve 20 operates accurately corresponding to the position where 0 is attached. The set value PS can be input in correspondence with each other, and the blockage detection valves 20 can be reliably operated to make the ice and snow 60
It is possible to reliably detect the location where the clogged. Further, while the ice and snow blockage prevention valve 20 is operating, the ice and snow spraying work is temporarily interrupted, but since it is not necessary to stop the blower 2 of the ice and snow transport device 1, clogging of the ice and snow 60 is eliminated. As soon as the ice and snow blockage prevention valve 20 returns, the ice and snow spraying work can be resumed immediately, which is convenient.

【００２３】なお、上述の実施例においては、流通本体
２１の上面に吹出口２１ｂを設け、かつ吹出口２１ｂに
対向する形で流通本体２１の下面に排出口２１ｃを設け
たが、吹出口２１ｂを介して流入口２１ｅと外部が連通
し、かつ排出口２１ｃを介して流出口２１ｆと外部が連
通すればどこに設けても良く、これら吹出口２１ｂ及び
排出口２１ｃは、流通本体２１の側面２１ｄ等に設けて
も良いし、ねじれの位置に設けても良いことは言及する
までもない。また、上述の実施例においては、１枚の下
部閉塞仕切弁体２３という同一の弁部材により、排出口
２１ｃを介して外部と流出口２１ｆを連通し、かつ排出
口２１ｃを流入口２１ｅから隔離し得る形で設けたが、
弁部材としては排出口２１ｃを介して外部と流出口２１
ｆを連通し得る弁部材と、排出口２１ｃを流入口２１ｅ
から隔離し得る弁部材との２枚の別々の弁部材の形で設
けても良いことは言及するまでもない。更に、上述の実
施例においては、上部閉塞弁体２２及び下部閉塞仕切弁
体２３を油圧ジャッキから成る開閉ジャッキ３２により
移動駆動するように設けたが、弁の駆動手段としては、
これら上部閉塞弁体２２及び下部閉塞仕切弁体２３が移
動駆動すれば何でも良く、モータ、ウインチ等を用いて
も良い。In the above-described embodiment, the outlet 21b is provided on the upper surface of the flow body 21 and the outlet 21c is provided on the lower surface of the flow body 21 so as to face the outlet 21b. The outlet 21e may communicate with the outside via the outlet 21c, and the outlet 21f may communicate with the outside via the outlet 21c. The outlet 21b and the outlet 21c may be provided on the side surface 21d of the distribution body 21. Needless to say, it may be provided in the same position or in a twisted position. In addition, in the above-described embodiment, the same valve member, that is, one lower closing sluice valve body 23, communicates the outside with the outlet 21f through the outlet 21c and separates the outlet 21c from the inlet 21e. I provided it in a form that
As the valve member, the outlet 21c and the outside through the outlet 21c
a valve member capable of communicating f with a discharge port 21c and an inflow port 21e.
It goes without saying that it may also be provided in the form of two separate valve members with the valve member being separable from the. Further, in the above-described embodiment, the upper closing valve body 22 and the lower closing sluice valve body 23 are provided so as to be moved and driven by the opening / closing jack 32 which is a hydraulic jack.
Anything may be used as long as the upper closing valve body 22 and the lower closing gate valve body 23 are driven to move, and a motor, winch or the like may be used.

【００２４】[0024]

【発明の効果】以上説明したように、本発明のうち第１
の発明は、流入口２１ｅ等の流入口と流出口２１ｆ等の
流出口を結ぶ形で内部に流通空間２１ａ等の氷雪流通空
間が形成された流通本体２１等の流通本体を有し、前記
流通本体に、前記氷雪流通空間と外部を連通し得る吹出
口２１ｂ等の吹出口を設けると共に、前記流通本体に、
前記氷雪流通空間と外部を連通し得る排出口２１ｃ等の
排出口を設け、前記流通本体の吹出口に、該吹出口を開
口閉塞自在な上部閉塞弁体２２等の第１の閉塞弁を、前
記吹出口を介して外部と前記流入口を連通し得る形で移
動駆動自在に設け、前記流通本体の排出口に、該排出口
を開口閉塞自在な下部閉塞仕切弁体２３等の第２の閉塞
弁を、前記排出口を介して外部と前記流出口を連通し得
る形で移動駆動自在に設け、更に、前記流通本体に、下
部閉塞仕切弁体２３等の仕切弁を、前記排出口を前記流
入口から隔離し得る形で移動駆動自在に設けて構成した
ので、As described above, the first aspect of the present invention
Of the present invention has a distribution main body such as a distribution main body 21 in which an ice and snow distribution space such as a distribution space 21a is formed so as to connect an inlet such as an inlet 21e and an outlet such as an outlet 21f. The main body is provided with air outlets such as the air outlets 21b capable of communicating the ice and snow circulation space with the outside, and the circulation main body is provided with:
A discharge port such as a discharge port 21c capable of communicating the ice and snow circulation space with the outside is provided, and a first closing valve such as an upper closing valve body 22 capable of opening and closing the outlet is provided at the outlet of the flow main body. A second closing valve body 23 or the like, which is movably and drivably provided so as to communicate the outside with the inflow port through the blowout port, and which can be opened and closed at the discharge port of the flow main body. A shutoff valve is movably provided so that the outside and the outflow port can be communicated with each other through the discharge port. Further, a sluice valve such as a lower shutoff sluice valve body 23 and the discharge port are provided in the circulation body. Since it is provided so as to be movable and driven so as to be separated from the inlet,

【００２５】氷雪をゲレンデに圧送する途上において、
氷雪が詰り易い氷雪圧送管の上り勾配部の上り口に氷雪
が詰りだしても、上り勾配部の上り口に設けられた氷雪
閉塞防止弁が、第１の閉塞弁により吹出口を介して流入
口と外部を連通し、また、第２の閉塞弁により排出口を
介して流出口と外部を連通し、更に、仕切弁により排出
口を流入口から隔離することにより、流入口よりも上流
に詰った氷雪を、流入口から、流出口及び排出口を介さ
ずに、吹出口を介して外部に吹出させると共に、上り勾
配部を落下して流出口から流通空間に逆流する氷雪を、
排出口を介して外部に排出させることができるので、氷
雪をゲレンデに圧送する氷雪圧送管内は氷雪により閉塞
されない。従って、氷雪圧送管等の配管を通して、人工
的な雪である氷雪をスキー場のゲレンデに搬送する場合
に、該配管の上り勾配部の上り口において氷雪が詰るこ
とを防止することが可能である。On the way of pumping ice and snow to the slope,
Even if ice and snow start to get stuck in the ascending section of the upslope section of the ice and snow pumping pipe, the ice and snow blockage prevention valve provided at the ascending section of the upslope section will flow through the blowout port by the first blockage valve. The inlet and the outside are communicated with each other, the outlet is communicated with the outside through the outlet by the second closing valve, and the outlet is isolated from the inlet by the sluice valve. Clogged ice and snow is blown from the inflow port to the outside through the blowout port, not through the outflow port and the discharge port, and the ice and snow that flows down from the outflow port to the circulation space from the outflowing slope portion,
Since it can be discharged to the outside through the discharge port, the inside of the ice-snow pumping pipe for sending ice-snow to the slope is not blocked by the ice-snow. Therefore, when ice snow, which is artificial snow, is conveyed to the slope of a ski resort through a pipe such as a snow and ice pumping pipe, it is possible to prevent the ice snow from clogging at the ascending slope of the pipe. .

【００２６】また、本発明のうち第２の発明は、第１の
発明において、前記第２の閉塞弁と前記仕切弁を、同一
の下部閉塞仕切弁体２３等の弁部材より形成して構成し
たので、第１の発明に加えて、一つの弁部材を操作する
ことにより、排出口を介して外部と流出口を連通し、か
つ排出口を流入口から隔離することができるので、構造
が簡単になり信頼性が向上し、また保守も容易になる。A second aspect of the present invention is the first aspect of the invention, wherein the second closing valve and the sluice valve are formed of the same valve member such as the lower closing sluice valve body 23. Therefore, in addition to the first aspect of the present invention, by operating one valve member, it is possible to communicate the outside with the outlet through the outlet and to isolate the outlet from the inlet. Simpler, more reliable, and easier to maintain.

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

【図１】図１は、本発明による氷雪閉塞防止弁の詳細を
示す斜視図である。FIG. 1 is a perspective view showing details of an ice and snow blockage prevention valve according to the present invention.

【図２】図２は、図１に示した氷雪閉塞防止弁内を氷雪
が流れる一例を示す斜視図である。FIG. 2 is a perspective view showing an example of ice and snow flowing in the ice and snow blockage prevention valve shown in FIG. 1.

【図３】図３は、図１に示した氷雪閉塞防止弁が作動し
た一例を示す斜視図である。FIG. 3 is a perspective view showing an example in which the ice and snow blockage prevention valve shown in FIG. 1 has operated.

【図４】図４は、図１に示した氷雪閉塞防止弁が適用さ
れた氷雪散布設備の一実施例を示す模式図である。FIG. 4 is a schematic diagram showing an embodiment of the ice and snow spraying equipment to which the ice and snow blockage prevention valve shown in FIG. 1 is applied.

【図５】図５は、従来の氷雪散布設備の一例を示す模式
図である。FIG. 5 is a schematic diagram showing an example of a conventional ice and snow spraying facility.

【符号の説明】 ２１……流通本体（流通本体） ２１ａ……氷雪流通空間（流通空間） ２１ｂ……吹出口（吹出口） ２１ｃ……排出口（排出口） ２１ｅ……流入口（流入口） ２１ｆ……流出口（流出口） ２２……第１の閉塞弁（上部閉塞弁体） ２３……第２の閉塞弁、仕切弁、弁部材（下部閉塞仕切
弁体）[Explanation of Codes] 21 ... Distribution Main Body (Distribution Main Body) 21a ... Ice / Snow Distribution Space (Distribution Space) 21b ... Blowout Port (Blowout Port) 21c ... Discharge Port (Discharge Port) 21e ... Inlet Port (Inflow Port) ) 21f ... Outflow port (outflow port) 22 ... First closing valve (upper closing valve body) 23 ... Second closing valve, gate valve, valve member (lower closing gate valve body)

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 流入口と流出口を結ぶ形で内部に氷雪流
通空間が形成された流通本体を有し、 前記流通本体に、前記氷雪流通空間と外部を連通し得る
吹出口を設けると共に、前記流通本体に、前記氷雪流通
空間と外部を連通し得る排出口を設け、 前記流通本体の吹出口に、該吹出口を開口閉塞自在な第
１の閉塞弁を、前記吹出口を介して外部と前記流入口を
連通し得る形で移動駆動自在に設け、 前記流通本体の排出口に、該排出口を開口閉塞自在な第
２の閉塞弁を、前記排出口を介して外部と前記流出口を
連通し得る形で移動駆動自在に設け、 更に、前記流通本体に、仕切弁を、前記排出口を前記流
入口から隔離し得る形で移動駆動自在に設けて構成した
氷雪閉塞防止弁。1. A distribution main body having an ice and snow distribution space formed therein in a form of connecting an inlet and an outlet, wherein the distribution main body is provided with a blowout port capable of communicating the ice and snow distribution space with the outside. The circulation body is provided with a discharge port capable of communicating the ice and snow circulation space with the outside, and the blowout port of the circulation body is provided with a first closing valve capable of closing the blowout port through the blowout port. A second closing valve, which is movably and drivably provided so as to communicate with the inflow port, and which is capable of opening and closing the exhaust port at the exhaust port of the flow main body; And a sluice valve provided in the flow main body so that the discharge port can be separated from the inflow port. 【請求項２】 前記第２の閉塞弁と前記仕切弁を、同一
の弁部材より形成して構成した請求項１に記載の氷雪閉
塞防止弁。2. The ice and snow blockage preventing valve according to claim 1, wherein the second block valve and the sluice valve are formed of the same valve member.