M427500 五、新型說明： 【新型所屬之技術領域】 本創作係關於一種瓦斯開關，尤指一種適用性強、感 熱靈敏、拆裝方便的瓦斯開關。 【先前技術】 本國新型專利第M356863號揭示一種『具有自動遮斷 裝置的瓦斯開關』’其特徵是在一現有瓦斯開關的旋塞下 方設置一與其徑向通孔相通的轴孔，用以安裝一已知的自 動遮斷裝置，該自動遮斷裝置包括有支座裝置、帽體和抗 壓彈簧。當自動遮斷裝置因為火災等因素致溫度高於用來 連接支座裝置和帽體的熱熔性固著劑的炼點時，該固著劑 即熔化而失去連接帽體和支座裝置的作用，於是被夾持於 帽體和支座裝置之間的抗壓彈簧乃通過其彈性回復力推 動帽體前進’使其外周壁與旋塞軸孔的孔壁密合而閉塞瓦 斯通路，停止供氣。 所述自動遮斷裝置因被安裝在瓦斯通路外，因此不會 增大瓦斯通路的阻力或造成壓力損失，也是前述專利的主 要創新點。但將自動遮斷裝置設置在旋塞下方的結果，至 少會有以下缺失： 1_該自動遮斷裝置是針對採用旋塞來開閉瓦斯通路 的瓦斯開關而設計’因此只適合與旋塞合作使用，而難以 實現在球閥或蝶形閥的瓦斯開關上；因為球閥或蝶形閥無 法提供收納自動遮斷裝置的空間，縱然可以，也有加工和 氣密等問題需要克服。 3 2. 該自動遮斷裝置完全埋設在瓦斯開關的管道殼體 内，而且離連接瓦斯器具（熱源）的流出口相對較遠，外部 產生的熱必須通過管道殼體導熱才能傳給自動遮斷裝 置，無法直接感熱，也就是，當管道殼體已達1〇〇。〇時， 自動遮斷裝置可能只有7〇。〇而已。因此，該自動遮斷裝置 反應時間較長，難以在第一時間熔斷而遮斷瓦斯。 3. 該自動遮斷裝置僅允許設置在旋塞的下方，製造上 缺乏彈性，難以滿足不同客戶的需求。 4. 該自動遮斷裝置被埋設在管道殼體内，裝拆不易， 一旦因為測試或其它原因而損壞後，不能很方便地換新。 至於前述專利宣稱該瓦斯開關的長度和重量較在瓦 斯通路上同時設置熱遮斷裝置及超流量關閉裝置的現有 瓦斯開關為小’可減少物料的使用，進而降低成本一節， 則非事實。原因在於’將自動遮斷裝置設置在旋塞下方， 而可減少管道殼體的長度雖然顯而易見，無庸置疑，但相 對的也會增加管道殼體的高度，使其整體重量根本沒能減 少，因此在材料成本方面不見得能降低。 【新型内容】 本創作乃為解決上述問題所成，其目的在提供一種改 上的瓦斯開關，其熱動闕可配合旋塞、球閥或蝶形閥等轉 動閥使用。 動閥可直接反應外:良::斯開關，其熱 |，皿度而及時熔斷，遮斷瓦斯通路，僖 止供氣，防止災害擴大。 τ M427500 本創作的另一目的在提供一種改良的瓦斯開關，其熱 動閥可設置在管道殼體的流入側或流出側，滿足不同客戶 的需求。 本創作的又一目的在提供一種改良的瓦斯開關，其熱 動閥使用螺紋安裝在管道殼體上，裝拆容易，可隨時換 新，而不需要拆裝熱動閥以外的任何零件。 具體實現本創作的瓦斯開關，包含一具有流通路的管 道殼體，在該流通路上設有一手動操作的轉動閥，以開閉 該流通路；在該轉動閥一側的該管道殼體上形成一和該流 通路相通的熱動閥室，該熱動閥室的下部設有一熱動閥， 上部則形成一收納空間；該熱動閥包括一固定在熱動閥室 下部的底座、一使用低熔點焊料結合在該底座上的閥體， 及一被挾持在該底座和閥體之間的壓力彈簀，該閥體在該 焊料熔化時被該壓力彈簧的彈性回復力推入該收納空間 内而遮斷該流通路。 所述瓦斯開關又包含一安全閥，該安全閥具備一支 架，該支架被一套筒保持在該流通路上，並具有一傘形的 閥塞支持於該支架為軸向滑動自如，及一壓力彈簧圍繞該 閥塞的桿部，該壓力彈簧的兩端分別支持於該支架和該閥 塞桿部的末端，以通過其彈性回復力迫使該閥塞退後而離 開形成於該套筒前端的閥座。 所述安全閥的閥塞又包含一形成於其前端的突出 部，該突出部在該閥塞因該壓力彈簧而退後時沒入該支架 内。 5M427500 V. New description: [New technical field] This creation is about a gas switch, especially a gas switch with strong applicability, sensitive sensitivity and convenient disassembly. [Prior Art] No. M356863 discloses a "gas switch with automatic shut-off device" which is characterized in that a shaft hole communicating with a radial through hole is provided under the cock of the existing gas switch for mounting a A known automatic interrupting device includes a bearing device, a cap body and a compression spring. When the automatic shut-off device is heated higher than the hot-melt fixing agent for connecting the support device and the cap body due to a fire or the like, the fixing agent melts and loses the connection of the cap body and the support device. Therefore, the compression spring that is clamped between the cap body and the abutment device pushes the cap body forward by its elastic restoring force to make the outer peripheral wall close to the hole wall of the plug shaft hole to close the gas passage and stop the supply of air. The automatic interrupting device is installed outside the gas passage, so it does not increase the resistance of the gas passage or causes pressure loss, and is also a major innovation of the aforementioned patent. However, the result of placing the automatic interrupting device under the cock is at least missing: 1_The automatic interrupting device is designed for the gas switch that uses the cock to open and close the gas passage. Therefore, it is only suitable for cooperation with the cock, and it is difficult It is realized on the gas switch of the ball valve or the butterfly valve; because the ball valve or the butterfly valve cannot provide space for accommodating the automatic breaking device, even if it is possible, problems such as processing and airtightness need to be overcome. 3 2. The automatic breaking device is completely buried in the pipe casing of the gas switch, and is relatively far from the outflow port connecting the gas appliance (heat source). The heat generated from the outside must be transferred through the pipe casing to be transferred to the automatic interrupting. The device cannot be directly heated, that is, when the pipe housing has reached 1 〇〇. In case of 〇, the automatic occlusion device may only be 7 inches. Oh. Therefore, the automatic shutoff device has a long reaction time, and it is difficult to melt at the first time to block the gas. 3. The automatic interrupting device is only allowed to be placed under the cock, which is inelastic in manufacturing and is difficult to meet the needs of different customers. 4. The automatic interrupting device is embedded in the pipe casing, which is difficult to install and disassemble. Once it is damaged due to testing or other reasons, it cannot be easily replaced. As for the aforementioned patents, it is not true that the length and weight of the gas switch are smaller than the existing gas switch in which the thermal interrupting device and the super-flow closing device are simultaneously disposed on the gas passage to reduce the use of materials and thereby reduce the cost. The reason is that 'the automatic interrupting device is placed under the cock, and the length of the pipe casing can be reduced. Although it is obvious, it is undoubted, but the height of the pipe casing is increased, so that the overall weight is not reduced at all. Material costs are not necessarily reduced. [New content] This creation is to solve the above problems. Its purpose is to provide a modified gas switch that can be used with rotary valves such as cocks, ball valves or butterfly valves. The moving valve can directly react to the outside: good:: the switch, its heat |, the degree of melting and timely melting, blocking the gas passage, stopping the gas supply, preventing the disaster from expanding. τ M427500 Another object of the present invention is to provide an improved gas switch that can be placed on the inflow or outflow side of the pipe housing to meet the needs of different customers. A further object of the present invention is to provide an improved gas switch in which the thermal valve is threaded onto the pipe housing for easy assembly and disassembly, and can be replaced at any time without the need to disassemble any components other than the thermodynamic valve. The gas switch specifically implementing the present invention comprises a pipe casing having a flow passage, and a manually operated rotary valve is disposed on the circulation path to open and close the flow passage; and a pipe casing is formed on the pipe casing side of the rotary valve a thermal valve chamber communicating with the flow passage, a lower portion of the thermal valve chamber is provided with a thermal valve, and an upper portion is formed with a storage space; the thermal valve includes a base fixed to a lower portion of the thermal valve chamber, and a low use a melting point solder is coupled to the valve body on the base, and a pressure magazine held between the base and the valve body, the valve body is pushed into the storage space by the elastic restoring force of the pressure spring when the solder is melted The flow path is blocked. The gas switch further includes a safety valve, the safety valve is provided with a bracket, the bracket is held by the sleeve on the circulation path, and has an umbrella-shaped valve plug to support the bracket for axial sliding freely, and a pressure a spring surrounds the stem of the valve plug, the two ends of the pressure spring are respectively supported at the ends of the bracket and the plug stem portion to force the valve plug to retreat away from the front end of the sleeve by its elastic restoring force Seat. The valve plug of the safety valve further includes a projection formed at a front end thereof, the projection being immersed in the bracket when the valve plug is retracted by the pressure spring. 5
JI42750(L 所述熱動閥通過形成於該底座外周料陽螺紋 在該熱動閥室的下部。 系 所，熱動閥的底座内部具有一管柱，該闕體為中空而 =該管柱的外面，力彈簧被裝進該管柱和該間=的 所述轉動閥為旋塞、球閥或蝶形閥。 本創作對照則揭專利，至少具有以下優點： 1·熱動閥可配合旋塞、球閥或蝶形閥等轉動閥來開閉 瓦斯通路，不受只能與旋塞合作的限制。 2·熱動閥部分組件（底座）露出管道殼體，且設置在瓦 斯流出側’因此更#近瓦斯器具（熱源），對於熱感應更為 敏銳，能夠縮短反應時間，及時熔斷而遮斷瓦斯， 害擴大。 火 3.熱動閥可設置在瓦斯開關的流入側或流出侧， 市場需求。 4·熱動閥使用螺紋鎖緊在管道殼體上，裝拆容易，一 旦因為測試或其它原因而損壞後，隨時都可換新，而不需 要拆裝熱動閥以外的任何零件。 至於本創作的技術内容及其它目的與特點參照下面 配合圖式的詳細實施例說明即可完全明白。 【實施方式】 第一圖為本創作『瓦斯開關』10的軸向（瓦斯流動方 向）剖面’可供說明本創作的技術内容。該瓦斯㈤關1〇包 含有管道殼體20、旋塞30、操作裝置4〇、熱動閥5〇和安全 M427500 閥60。其中： 管道殼體20，内部形成一流通路21，在流通路21的流 入口 22外侧形成一螺紋接頭23供連接瓦斯輸送管（未圖 示），在流通路21的流出口 24外側則形成一供連接軟管（未 圖示）的接頭25，該軟管的另一端乃連接至瓦斯器具（未圖 式）。所述接頭23,25亦可為其它型式，不受附圖所示實施 例的限制。又，在流入口 22和流出口 24之間的流通路21 上形成一開口朝上的旋塞室26，用來收納旋塞30 ;在旋塞 ® 室26和流出〇24之間的管道殼體20上則設置一開口朝下 的熱動閥室27，該熱動閥室27的下部用來安裝熱動閥50， 上部是一和流通路21垂直相交的圓錐狀收納空間27a，其 作用留待後述，暫且表過。熱動閥室27也可設置在管道殼 體20的流入侧，不受設於流出側的限制。所述流入侧和流 出侧乃以旋塞室26為界，從流入口 22至旋塞室26定義為流 入側（未標號），從旋塞室26至流出口 24則定義為流出側（未 φ 標號）。在旋塞室26的開口還具有一對相對應的導孔28設 置在其圓周部上’此導孔28的一端向上延伸而擴大其高 度，其作用同樣留待後.述。 旋塞30，是一沿徑向開著孔道31的圓錐狀塞子而安裝 在旋塞室26内和流通路21成直角’並藉著裝在旋塞上的 操作裝置40而轉動以開閉流通路21。 操作裝置40’包括一連桿41套在旋塞30上面，連桿41 上面則用一螺絲42鎖著一旋鈕43。連桿41和轉動閥3〇之間 還有一壓力彈簧44,並有一插銷45沿徑向貫穿連桿41和旋 7 J4.275QiL_^---—---- 塞30,插銷45的兩端則插入管道殼體20的導孔28隨著連桿 41轉動而沿著導孔28移動，以限制旋塞3〇的最大轉動角度 (大約90度）。如此，當動手轉動旋钮43時’即可通過連桿 41帶動旋塞30改變閥位，使其孔道31與管道殼體20的流通 路21相通或不相通’而達到開閉流通路21之目的° ^紅塞 30處於閉閥位時’插銷45的兩端因壓力彈簧44的彈性力而 來到導孔28的擴大處，因此，當要打開旋塞30時，必須先 壓下旋紐43才能加以轉動，進而通過連桿41帶動旋塞3〇 作動成開閥位’確保瓦斯開關10不會被隨意地開啟。反 之，要關閉瓦斯開關10時，直接轉動旋鈕43即可帶動旋塞 30同轉而遮斷流通路21。 熱動閥50’包括一底座51、一閥體52和一壓力彈黃 53。底座51固定在熱動閥室27的下部，其内部提供—導 套55，以限制閥體52做直線運動，防止其偏掉。閥體52 為中空圓錐狀而套在底座51的導套55外面，並以低炼點 焊料（未圖示）和底座51結合在一起。焊料最好是使用在溫 度80與1〇〇°C範圍可熔化的錫基合金，也可以為適當的 用途使用在其它的溫度範圍能熔化的其它材料。焊料係气 置在底座51的内周部和閥體52的外周部之間◊壓力彈菁 53在閥體52焊接在底座51之前被裝進底座51的導套的 和閥體52的内部，其中一端支持於底座51，另一端則支 持在閥體52上而呈被壓縮的狀態，以蓄積彈性能。在較 佳的實施例中，熱動閥50的底座51具有形成於其外周^ 的陽螺紋54,熱動閥室27的開口則設有陰螺紋（未標號。， M427500 使熱動閥50可通過螺紋而裝拆自如地安裝在管道殼體20 上（更確切地說’是鎖緊在熱動閥室27的下部），方便損壞 後可隨時更換。 安全閥60 ’具備一可讓瓦斯流通的支架61，該支架61 被一套筒66保持在流通路21的流入侧，並具有一傘形的閥 塞62支持於支架61為轴向滑動自如，及一壓力彈簧63圍繞 闕塞62的桿部64。壓力彈簣63的兩端分別支持於支架61 籲和閥塞椁部64的末端，以藉其彈性回復力迫使閥塞62退後 開I成於套清66前端的閥座67。在閥塞62因壓力彈簧 63而退後時’閥塞62前端的突出部65乃沒入支架61内。 如第二圖所示’當熱動閥50因為火災等因素，致溫 度上升超過低熔點焊料允許的最高溫度時，烊料就會熔化 而導致閥體52通過壓力彈簧53的彈性力脫離底座51 ; 在閥體52脫離途中，通過其内周部和導套55的外周部的 /月動配5，使閥體52可不偏不倚地滑入收納空間27a内， •將流通路21從中阻斷，同時在兩者的接觸面間形成妥善 的氣密而閉塞流通路21，遮斷瓦斯，防止災害擴大。 如第一圖所示，在瓦斯器具正常使用狀態時，閥塞62 刖後方的瓦斯壓力差小於壓力彈簧63的彈性力。因此，安 全閥60的閥塞62保持在開閥位，使瓦斯可以流通。 “如第三圖所示，當發生如瓦斯軟管前端由瓦斯器具脫 落等的異常情況時，閥塞62前後方的瓦斯壓力差即大於壓 力彈菁63的彈性力’使閥塞62能夠前進並密著於閥座67 而遮斷流通路21，停止供氣。 9 在安全閥60發生作用時，形成於閥塞62前端中央的突 出部65乃突出於套筒，方，之後人為操作旋钮43使旋塞 30轉動；在旋塞30的旋轉途中，其可向後推動_62的突 出部65使閥塞62離開閥座67，並因壓力彈簧肋的彈性力而 自動復歸開閥位，恢復瓦斯流通。 上述實施例採用的旋塞(Cock)3〇是一種轉動闕，但轉 動閥也有各種不同的種類，例如球閥（Ba丨丨Va|ve)、蝶形 _terfly Vaive)等。因此，本創作不受與旋塞合作的限 制，還可配合球閥、蝶形閥等轉動閥實施。第四圖為本創 作搭配球閥70實施的軸向剖面圖。本實施例所揭示的瓦斯 開關1〇a與上述實施例的差異主要在於使用球閥7〇開閉流 通路21 ’其餘部分完全相同’因此與上述實施例相同的部 分均以相同的符號標示，且先前對於上述實施例的說明亦 適用於本實施例，不再重複。在本實施例中，管道殼體2〇a 在流入口22和流出口24之間的流通路21上形成一開口朝 上的球閥室29，用來收納具有瓦斯流通孔道71的球閥7〇 ; 在球閥室29的兩侧則各自裝有樹脂製成的環狀閥座72，球 閥70被挾持於兩閥座72之間，藉著裝在球閥7〇上的操作裝 置40a而轉動以開閉流通路21。所述操作裝置4〇a包括一連 桿41a套在球閥70上面，連桿41a上面套著一旋鈕43，一 螺絲42a穿過旋鈕43a而旋入連桿4la，使旋鈕43a一方面 可相對於連桿41a上下移動，一方面可帶動連桿41a轉動。 %^43a和管道殼體20a之間還有一圍繞連桿413周圍的壓 力彈簧44a，同時管道殼體20a在球閥室29的開口的外周部 M427500 具有一對相對應設置的導槽28a，此導槽28a的一端向上延 伸以擴大其高度’而旋鈕43a的内周部則包含一對相對應 設置的卡榫46 ’可沿著導槽28a移動’以限制球閥7〇的最 大轉動角度（大約90度）。如此，藉著下壓旋钮43a並轉動 之，即可通過連桿41a帶動球閥70改變閥位，達到開閉瓦 斯流通路21之目的。基於相同的安全理由，當球閥7〇處於 閉閥位時’旋鈕43a的卡榫46因壓力彈簧44a的彈性力而來 到導槽28a的擴大處，因此，當要打開球間7〇時，必須先 壓下旋紐43a’才能加以轉動，再從連桿“a向球閥7〇傳達 相同的旋轉’使球閥7〇作動成開閥位，_保瓦斯開關i〇a 不會被隨意地開啟。反之，要關閉瓦斯開關l〇a時，則可 直接轉動旋&43a而經由連桿41a帶動球閥7Q流通路 21 ° 至於蝶形閥係把輪裝設於圓盤的直獲方向，而以此轴 為中I:動的閥。本創作同樣適合搭配蝶形閥實施。 」上述實〜例可在不脫離本創作的範圍下加以若 Μ =以上的說明所包含及附圖中所示的全部事項應 【圖式簡單^/禮制本創作的中請專利範圍。 塞、孰動作第—實施例的軸向剖面圖，顯示旋 塞…、動閥及女王閥均處於開閥位的狀態。 第一圖為與第一圖近似的剖面圖 .處於開閥位，而熱動龆从&a、ea .、、、員不疑塞、女全閥 % - 動成閉間位，遞if流通路的狀態。 第—圖為與第-圖近似的剖面圖，顯示旋塞、熱動闊JI42750 (L) is formed by a male thread formed on the outer periphery of the base at a lower portion of the thermal valve chamber. The base of the thermodynamic valve has a column inside, and the body is hollow and the column is On the outside, the force spring is loaded into the column and the rotary valve is the cock, the ball valve or the butterfly valve. The present invention is patented and has at least the following advantages: 1. The thermodynamic valve can be matched with the cock, A rotary valve such as a ball valve or a butterfly valve is used to open and close the gas passage, and is not limited by cooperation with the cock. 2. The heat-acting valve part assembly (base) exposes the pipe casing and is disposed on the gas outflow side 'so more # near gas The appliance (heat source) is more sensitive to thermal induction, can shorten the reaction time, and melts in time to block the gas, and the damage is enlarged. Fire 3. The hot-acting valve can be set on the inflow side or the outflow side of the gas switch, and the market demand. The thermodynamic valve is threaded onto the pipe casing for easy assembly and disassembly. Once damaged due to testing or other reasons, it can be replaced at any time without the need to disassemble any parts other than the thermodynamic valve. Technical content Other objects and features will be fully understood by reference to the following detailed description of the embodiments of the drawings. [Embodiment] The first figure is the axial (gas flow direction) section of the creation of the gas switch 10 for illustration The technical content of the gas (5) shut-off includes a pipe casing 20, a cock 30, an operating device 4〇, a thermal valve 5〇, and a safety M427500 valve 60. Among them: the pipe casing 20, the inside of which forms a first-class passage 21, A threaded joint 23 is formed on the outer side of the inflow port 22 of the flow passage 21 to connect a gas transfer pipe (not shown), and a joint 25 for connecting a hose (not shown) is formed outside the outflow port 24 of the flow passage 21, which The other end of the hose is connected to a gas appliance (not shown). The joints 23, 25 may also be of other types, not limited by the embodiment shown in the drawings. Also, at the inflow port 22 and the outflow port 24 An open-faced cocking chamber 26 is formed on the flow passage 21 for receiving the cock 30; a heat-operated valve chamber having an opening downward is disposed on the pipe housing 20 between the cocking chamber 26 and the outflow dam 24. 27, the lower portion of the thermodynamic valve chamber 27 is used The heat-acting valve 50 is installed, and the upper portion is a conical storage space 27a perpendicularly intersecting the flow passage 21, and its function is left to be described later, and the heat-operated valve chamber 27 may be disposed on the inflow side of the duct casing 20, The restriction is provided on the outflow side. The inflow side and the outflow side are bounded by the plug chamber 26, and the inflow side (not numbered) is defined from the inflow port 22 to the plug chamber 26, and the chute chamber 26 to the outflow port 24 are defined as The outflow side (not φ mark). The opening of the cockhouse chamber 26 also has a pair of corresponding guide holes 28 disposed on the circumferential portion thereof. The one end of the guide hole 28 extends upward to expand its height, and its effect is also left after. The cock 30 is a conical plug that opens the tunnel 31 in the radial direction and is installed in the cock chamber 26 at a right angle to the flow passage 21 and is rotated by the operating device 40 mounted on the cock to open and close the flow passage 21. The operating device 40' includes a link 41 that fits over the cock 30, and a knob 43 locks a knob 43 thereon. There is also a pressure spring 44 between the connecting rod 41 and the rotating valve 3〇, and a pin 45 penetrates the connecting rod 41 and the screw 7 J4.275QiL_^-------the plug 30 in the radial direction, and the two ends of the bolt 45 Then, the guide hole 28 inserted into the duct housing 20 moves along the guide hole 28 as the link 41 rotates to limit the maximum rotation angle (about 90 degrees) of the cock 3. In this way, when the knob 43 is turned by hand, the button 403 can be rotated by the connecting rod 41 to change the valve position, so that the channel 31 communicates with or not communicates with the flow path 21 of the pipe casing 20 to achieve the purpose of opening and closing the flow path 21. When the red plug 30 is in the valve closing position, both ends of the bolt 45 come to the enlarged portion of the guide hole 28 due to the elastic force of the pressure spring 44. Therefore, when the cock 30 is to be opened, the knob 43 must be depressed first to rotate. Then, the cock 3 is actuated to open the valve position by the connecting rod 41 to ensure that the gas switch 10 is not arbitrarily opened. Conversely, when the gas switch 10 is to be turned off, the knob 43 can be directly rotated to rotate the cock 30 to interrupt the flow path 21. The heat-acting valve 50' includes a base 51, a valve body 52, and a pressure spring 53. The base 51 is fixed to the lower portion of the thermal valve chamber 27, and is internally provided with a guide sleeve 55 to restrict the linear movement of the valve body 52 to prevent it from being deflected. The valve body 52 has a hollow conical shape and is fitted over the guide sleeve 55 of the base 51, and is joined to the base 51 by a low-point solder (not shown). The solder is preferably a tin-based alloy that is meltable at temperatures of 80 and 1 ° C, or other materials that can be melted at other temperature ranges for proper use. The solder gas is placed between the inner peripheral portion of the base 51 and the outer peripheral portion of the valve body 52. The pressure elastic crystal 53 is loaded into the guide bush of the base 51 and the inside of the valve body 52 before the valve body 52 is welded to the base 51. One end is supported by the base 51, and the other end is supported on the valve body 52 in a compressed state to accumulate elastic energy. In a preferred embodiment, the base 51 of the thermodynamic valve 50 has a male thread 54 formed on its outer periphery, and the opening of the thermodynamic valve chamber 27 is provided with a female thread (not labeled. M427500 allows the thermodynamic valve 50 to It is detachably mounted on the pipe casing 20 by screws (more precisely, it is locked in the lower part of the thermal valve chamber 27), and can be replaced at any time after being damaged. The safety valve 60' has a gas circulation The bracket 61 is held by a sleeve 66 on the inflow side of the flow path 21, and has an umbrella-shaped valve plug 62 for supporting the bracket 61 to be axially slidable, and a pressure spring 63 surrounding the dam 62. The rod portion 64. The two ends of the pressure magazine 63 respectively support the end of the bracket 61 and the valve plug portion 64 to force the valve plug 62 to retreat and open the valve seat 67 at the front end of the sleeve 66 by its elastic restoring force. When the valve plug 62 is retracted by the pressure spring 63, the protruding portion 65 at the front end of the valve plug 62 is immersed in the bracket 61. As shown in the second figure, when the thermal valve 50 is heated due to a fire or the like, the temperature rises more than When the low melting point solder allows the highest temperature, the material will melt and cause the valve body 52 to pass the pressure bomb. The elastic force of the 53 is separated from the base 51; the valve body 52 is slidably inserted into the storage space 27a through the inner peripheral portion and the outer peripheral portion of the guide sleeve 55 in the middle of the valve body 52 being disengaged. • The flow path 21 is blocked from it, and a proper airtightness is formed between the contact faces of the two, and the flow path 21 is closed to block the gas and prevent the disaster from expanding. As shown in the first figure, when the gas appliance is in normal use. The gas pressure difference behind the valve plug 62 is smaller than the elastic force of the pressure spring 63. Therefore, the valve plug 62 of the safety valve 60 is kept at the valve opening position, so that the gas can flow. "As shown in the third figure, when gas occurs, such as When the front end of the hose is abnormal by a gas appliance or the like, the difference in the gas pressure between the front and the rear of the valve plug 62 is greater than the elastic force of the pressure spring 63. The valve plug 62 can advance and adhere to the valve seat 67 to block the flow path. 21, the air supply is stopped. 9 When the safety valve 60 acts, the protruding portion 65 formed at the center of the front end of the valve plug 62 protrudes from the sleeve, and then the operation knob 43 is manually operated to rotate the cock 30; during the rotation of the cock 30 , which can push the protrusion of _62 backwards 65 causes the valve plug 62 to leave the valve seat 67, and automatically reopens the valve position due to the elastic force of the pressure spring rib to restore gas circulation. The cock (Cock) 3〇 used in the above embodiment is a rotating cymbal, but the rotary valve also has various Different types, such as ball valve (Ba丨丨Va|ve), butterfly _terfly Vaive), etc. Therefore, this creation is not limited by cooperation with the cock, and can also be implemented with rotary valves such as ball valves and butterfly valves. The figure is an axial sectional view of the creation of the matching ball valve 70. The difference between the gas switch 1A disclosed in the present embodiment and the above embodiment is mainly that the ball valve 7 is used to open the closed flow path 21' and the rest is identical. The same portions of the embodiments are denoted by the same reference numerals, and the descriptions of the foregoing embodiments are also applicable to the present embodiment and are not repeated. In this embodiment, the pipe housing 2〇a forms an open-facing ball valve chamber 29 on the flow passage 21 between the inflow port 22 and the outflow port 24 for receiving the ball valve 7 having the gas flow passage 71; On both sides of the ball valve chamber 29, there are respectively annular valve seats 72 made of resin. The ball valve 70 is held between the two valve seats 72, and is rotated by the operating device 40a mounted on the ball valve 7 to open and close the flow path. twenty one. The operating device 4A includes a connecting rod 41a sleeved on the ball valve 70. The connecting rod 41a is sleeved with a knob 43. A screw 42a is screwed into the connecting rod 4a through the knob 43a, so that the knob 43a can be opposite to the shaft 43a. The link 41a moves up and down, and on the one hand, the link 41a can be rotated. There is also a pressure spring 44a around the connecting rod 413 between the %^43a and the pipe housing 20a, and the pipe housing 20a has a pair of corresponding guiding grooves 28a at the outer peripheral portion M427500 of the opening of the ball valve chamber 29, this guide One end of the groove 28a extends upward to enlarge its height' and the inner peripheral portion of the knob 43a includes a pair of correspondingly disposed latches 46' movable along the guide groove 28a to limit the maximum rotation angle of the ball valve 7〇 (about 90 degree). Thus, by pressing the knob 43a and rotating it, the ball valve 70 can be driven by the link 41a to change the valve position to achieve the purpose of opening and closing the gas flow path 21. For the same safety reason, when the ball valve 7 is in the closed position, the click 46 of the knob 43a comes to the enlarged portion of the guide groove 28a due to the elastic force of the pressure spring 44a, and therefore, when the ball 7 is to be opened, The knob 43a' must be depressed before it can be rotated, and then the same rotation is transmitted from the link "a to the ball valve 7" to cause the ball valve 7 to actuate to open the valve position. The _Gass switch i〇a will not be opened arbitrarily. Conversely, when the gas switch l〇a is to be closed, the rotary valve 43a can be directly rotated to drive the ball valve 7Q through the connecting rod 41a. The flow path is 21 ° as for the butterfly valve to be mounted in the straight direction of the disk. This axis is the middle I: moving valve. This creation is also suitable for the implementation of the butterfly valve. The above-mentioned examples can be added without departing from the scope of the present invention. All the matters should be [simplified in the drawing ^ / ritual system of the scope of the patent application. The axial cross-sectional view of the plug-and-twist action embodiment shows that the cock..., the moving valve and the queen valve are all in the open position. The first picture is a cross-sectional view similar to the first figure. It is in the open position, and the thermal 龆 from &a, ea.,,, the member is not suspicious, the female full valve % - move into the closed position, hand if The state of the flow path. The first figure is a cross-sectional view similar to the first figure, showing the cock, thermal expansion
M4275QQ 處於開閥位，而安全閥作動成閉閥位，遮斷流通路的狀態。 第四圖為本創作第二實施例的轴向剖面圖，顯示球 閥、熱動閥及安全閥均處於開閥位的狀態。 【主要元件符號說明】 10,10a...瓦斯開關 20,20a...管道殼體 21...流通路 22…流入口 23...接頭 24…流出口 25...接頭 26...旋塞室 27...熱動閥室 27a…收納空間 28...導孔 28a…導槽 2 9...球閥室 30...旋塞 31...孔道 40,40a...操作裝置 41，41a...連桿 42,42a…螺絲 43,43a."旋钮 44,44a...壓力彈簧 45...插銷 46...卡摔 50...熱動閥 51...底座 52...閥體 53…壓力彈簧 54...陽螺紋 55...導套 60...安全閥 61…支架 62...閥塞 63…壓力彈簧 64...桿部 65...突出部 66...套筒 67...閥座 7 0...球閥 71...孔道 72…閥座 12The M4275QQ is in the open position and the safety valve acts as a closed valve position to interrupt the flow path. The fourth drawing is an axial sectional view of the second embodiment of the creation, showing that the ball valve, the thermal valve and the safety valve are both in the open position. [Description of main component symbols] 10, 10a... Gas switch 20, 20a... Pipe housing 21... Flow path 22... Inlet 23... Fitting 24... Outlet 25... Fitting 26.. Closure chamber 27...Thermal valve chamber 27a... accommodation space 28... guide hole 28a... guide groove 2 9...ball valve chamber 30... cock 31... hole 40, 40a... operating device 41, 41a... Connecting rod 42, 42a... Screw 43, 43a. " Knob 44, 44a... Pressure spring 45... Bolt 46... Card drop 50... Thermal valve 51... Base 52...valve body 53...pressure spring 54...male thread 55...guide sleeve 60...safety valve 61...bracket 62...valve plug 63...pressure spring 64...rod 65. .. protrusion 66... sleeve 67... valve seat 7 0... ball valve 71... hole 72... valve seat 12