200925519 - 六、發明說明： 【發明所屬之技術領域^ 本發明有關-種將燃燒燃料所得之熱能傳遞於水，以 轉換為水蒸氣或溫水而作為熱源機器之鍋爐系統，尤其有 :關具備用以檢測供水線中之逆流的功能之鋼爐系統。本案 •係根據2007年12月6日在日本所申請的特願2007-316367 主張優先權，在此援用其内容。 【先前技術】 ❹ —般而言，賴的供水線係設有防止織水逆流 之止回閥。然而，當發生止回閥卡住異物等不良情形，以 致鍋爐水逆流時，鍋爐水會流入供水泵内部，形成腐蝕或 孔蝕（cavitation)而導致供水泵之性能降低，或供水線的 其他部位發生破損。 因而，在習知之鍋爐系統中，提供有^種在供水線的 止回閥之上游侧設置用以檢測逆流之感測器者。例如，專 ❹利文獻1公開一種在供水線之中，於供水泵與止回閥之間 設置用以檢測供水溫度的供水溫度檢測器，而在供水溫度 上昇到預定值以上時判斷為逆流之供水逆流檢測裝置。 (專利文獻1)日本特開平6—341605號公報 然而，採用溫度感測器，以溫度變化檢測逆流的方法， 係’、旎依溫度檢測高溫的鋼爐水之逆流，卻無法檢測流動 的方向，因而，當供水朝順方向流動時亦有誤檢測之虞。 而且，為了防止如此之誤檢測以提昇檢測性能，則必 須於供水泵停止之後相隔預定時間再進行溫度測定，以致 320633 4 200925519 • 延誤開始檢測逆流的時間。因此，在供水泵停止後的第一 時間内發生逆流時，會產生無法檢測逆流或檢測遲延而無 法避免逆流發生等問題。 【發明内容】 * [發明所欲解決之課題] ·- 本發明之目的在於提供一種具備可迅速且確實地檢測 供水線中之銷爐水之逆流的功能之鋼爐系統。 [用以解決課題之手段] ❹ 本發明之鍋爐系統係具備：供水槽；鍋爐本體；用以 連接上述供水槽及上述鍋爐本體的供水線；設置於上述供 水線的供水泵；及在上述供水泵之下游測設置於上述供水 線的止回閥；該鍋爐系統具備：設置於上述供水線的上述 供水泵與上述止回閥之間的葉輪；用以檢測上述葉輪之旋 轉方向的旋轉檢測感測器；及由上述旋轉檢測感測器之輪 出而檢測出上述供水線中來自上述鍋爐本體的鍋爐水的逆 ❹ 流之控制手段。 再者，本發明之鍋爐系統係，具備：供水槽；鍋爐本 體；用以連接上述供水槽及鍋爐本體的供水線；詨置於上 述供水線的供水泵；在上述供水泵之下游侧設置於上述供 水線的止回閥；在該鍋爐系統具備：設置於上述供水線的 上述供水系與上述止回閥之間的第1溫度感測器；設置於 上述供水線的上述供水泵與上述第丨溫度感測器之間的第 2溫度感測器；及由上述第（及第2溫度感測器之輪出而 檢測出上述供水線中來自上述鍋爐本體之鍋爐水的逆流之 320633 5 200925519 控制手段。 再者’本發明之流量計係設置在連接供水槽與銷爐本 體的供水線，用以計測流動於上述供水線的流體之流量 者，該流量計係具備：内部形成有流路的殼體；可繞 旋轉自如地固定於上述殼體，且藉 〇* ^，丨L動於上述流路内之 -體而捕的葉輪；用以檢測上述葉輪之旋轉方向 檢測感測器；及由上述旋轉檢測感測器之輸出而檢 ，供水線中來自上述_本體之_水的逆流之控制t 〇 再者，本發明有關之流量計係設置在連接供水槽 爐本體的供树，用輯職動於上述供水線的^^ 量者’該流量計係具備：内部形成有流路的殼體；减 述流路而設置於上述殼體之下游測的第i溫度感测器:上 向上述流路而設置於上述殼體之上游測的第2溫产二面 器；及由上述第1及第2溫度感測器之輪出而檢測^挪 供水線中來自上述鍋爐本體之鍋爐水的逆流之控制手俨述 依據本發明之鍋爐系統，可迅速且確實地檢 線中之鍋爐水的逆流。 ’、水 【實施方式】 以下，參照圖式詳細說明本發明之實施形態。首先 根據第1圖說明本實施形態之鍋爐系統之構成。第.丨’ 概略顯示本實施形態之锅爐系統的構成方塊圖。 如第1圖所示’本實施形態之鍋爐系統1係具備 爐本體10 ;供水槽15 ;構成供水槽15與鍋爐本體1〇 _ 3之〇633 6 200925519 • 的供水線之配營？ η · , , 目20,供水泵22;流罝計30 ;及止回閥23。 锅f本體10係具有錦爐控制電路11。而流量計30則 具有流夏計控制電路仏。如第1圖中之虛線所示，銷爐控 fj電路11係以配線來與供水果22及流量計控制電路45相 :連接’而可控制供水泵22之動作，並且從流量計控制電路 、-45接收通過流量計3G的供水之流量、溫度及表示逆流檢 測之信號。另外，後述之設置於流量計30的各種感測器與 φ 流量計控制電路45係以配線46相連接。 接著，參照第2圖至第5圖說明本實施形態之流量計 的構成。本實施形態中，在流量計3〇設有用以檢測逆流的 各種感測器。第2圖為本實施形態的流量計之前視圖，第 3圖為本實施形態的流量計之右側視圖，第4圖為第3圖 中B-B線之剖視圖’第5圖為第2圖中A-A線之剖視圖。 如第2圖至第5圖所示·，流量計3〇具備：殼體31、〇 形環32、葉輪33、軸承35、六角螺拴38、熱阻體40、2 ❹個霍爾1C 41、41及配線46。殼體31係夾著〇形環32而 以4支六角螺栓38而將大致圓筒狀的殼體A31-l與殼體 Β31-2固定連接在同軸上而構成。 在殼體31内形成有供水流動的流路，於第2圖及第4 圖中，左侧為連通於供水泵22及供水槽15之上游側，有 側為連通於止回閥23及鍋爐本體1〇之下游侧。在殼體31 之流路内設有葉輪33，而葉輪33的軸係藉由固定在殼體 31的翼肋31a、31b之2個軸承35可旋轉自如地支撐。告 水在流路内流動時，葉輪33即旋轉。由上游往下游流動: 320633 7 200925519 • 正流時、與由下游往上游流動的逆流時，葉輪33係朝反方 向旋轉。 翼肋31a係一體形成於殼體A31-1，翼肋31b則一體 形成於殼體B31-2，而如第3圖至第5圖所示，3個翼肋板 : 係以120°間隔從殼體31的中心軸附近延伸至外壁。此翼 - 肋31a、31b亦具有將流動於流路内流體整流的作用。 熱阻體40係如第3圖及第4圖所示，以使其感測器部 分位於與流路内之翼肋31b之下游侧鄰接之方式固定於殼 ❹ 體B31-2。如此，藉由在流量計30的下游側之端部附近設 置熱阻體40，即可於逆流發生時立即檢測出《當然，熱降 體40之設置位置並未受限於上述位置，而可自由變更。例 如設置於翼肋31b的内部也可以。但最好不要設置在會使 葉輪33的旋轉特性劣化、或增加壓力損失的位置。 熱阻體40係以配線46連接於流量計控制電路45 °流 量計控制電路45係由熱阻體40之輸出訊號算出流路内的 〇 溫度，依後述之處理檢測出锅爐水的逆流。流量計控制電 路45係構成為當檢測出鍋爐水逆流時，即將逆流檢測訊號 輸出到鍋爐控制電路11。 2個霍爾1C 41、41係如第5圖所示’在與葉輪33之 外周部分相對向之位置，由樹脂製的支撐具所支撐，在 同一圓周上以45。間隔設置。葉輪33係具有以塑膠與磁性 粉混合所形成的4個葉片，各葉片係交互磁化成5極或N 極。 因此，當葉輪33旋轉時，則霍爾1C 41、41附近之磁 320633 8 200925519 • 場會變化，且由霍爾IC 41、41輸出顯示磁場變化之數位 訊號。2個霍爾1C 41、41係以配線46連接於流量計控制 電路45。流量計控制電路45係根據由2個霍爾1C 41、41 所送來的輸出訊號，進行運算處理，以算出葉輪33的旋轉 : 方向及旋轉速度。由此旋轉方向可檢測出流動在流量計30 内流路的流體之流向，且由旋轉速度可檢測出流量。 流量計控制電路45係構成為，當根據葉輪33之旋轉 方向而檢測出鍋爐.本體10的鍋爐水由下游侧往上游側逆 流時，即將逆流檢測訊號輸出到鍋爐控制電路11。 在此，霍爾1C 41、41之設置位置並未受限於45°間 隔，亦可為可獲得相同波形輸出的135°間隔，或是因流體 順向與逆向流動時，輸出波形會不同，只要可檢測到流體 流動之方向，則設在任何位置都可以。 以上，說明了本實施形態之鍋爐系統之構成，接著， 參照圖式說明本實施形態的逆流檢測之處理流程。首先說 Q 明以熱阻體40進行溫度檢測以檢測出逆流之情形。第6圖 為顯示使用本實施形態之熱阻體依溫度進行逆流檢測處理 的流程之流程圖。 首先，在步驟S11中，於供水泵22為OFF時，逆流之 監視開始·，在步驟S12中，由流量計控制電路45監視是否 為 T22T1+20°C 且 T22 80°C。其中，T1[°C]為從 S11 中的 供水泵22停止經過預定時間後（例如6秒後）的熱阻體40 所測定之溫度，並記憶在流量計控制電路45内之記憶體。 T2[°C ]為熱阻體40所測定的現在溫度。藉此，在步驟S12 9 320633 200925519 • 中，確認鍋爐本體10内之高溫鍋爐水是否有逆流到熱阻體 40的位置。 在步驟S12中，判斷為T22T1+20°C且T2^80°C時， 則進入到步驟S13，使供水泵22驅動預定時間tl(例如3 : 秒鐘），以進行逆流的解除動作。具體而言，則於步驟12 ： 中，流量計控制電路45判斷為T22T1+20°C且T2280°C 時，於步驟S13中將逆流檢測訊號輸出到鍋爐控制電路 11。於是，接收到逆流檢測訊號的鍋爐控制電路11乃使供 ® 水泵22驅動tl秒鐘。 鍋爐水逆流的原因，以止回閥23内卡住異物導致無法 關閉的情形為多。所以，在步驟S13中，為了去除卡在止 回閥23的異物，使供水泵22驅動tl秒鐘，以使供水在止 回閥23内順向流動。 步驟S13的解除動作之後，進入到步驟S14，確認逆 流是否已解除。亦即，在步驟S14中再監視是否為T42T3+ Q 20°C且T4280°C。其中，T3[°C ]係在步驟S13中驅動tl 秒鐘後之供水泵22停止預定時間後（例如6秒後）熱阻體 40所檢測得之溫度，且記憶於流量計控制電路45内的記 憶體。T4[°C ]則為熱阻體40所檢測到的現在溫度。 在步驟S14中，判斷為T42T3+20°C且T4280°C時， 則意味著逆流狀態尚未被解除，於是進入步驟S16，由鍋 爐控制電路11使供水泵22以低轉速驅動，在進行逆流解 除動作之同時，使逆流發生警報器鳴放。 具體言之，於步驟S14中，流量計控制電路45判斷為 10 320633 200925519 • T42T3+20°C且T4280°C時，即在步驟S15中，將第2次 的逆流檢測訊號輸出到鍋爐控制電路11，而接收到第2次 逆流檢測訊號的鍋爐控制電路11即進行控制使供水泵22 以低轉速驅動之同時，使逆流發生之警報器鳴放。進入步 : 驟S16之後，鍋爐系統1停止運作，由鍋爐的保養維修人 員等進行修理。 步驟S14中所進行的逆流是否已解除之監視，係在步 驟S15中進行預定之時間t2(例如20秒鐘）。然後，若“T4 ® 2T3+20°C且T4280°C”之條件未達t2秒鐘，則判斷為逆 流解除成功而進入步驟S12，繼續進行步驟S12之監視'， 直到供水泵22下次0N時為止。 接著說明以霍爾1C 41、41進行葉輪33之旋轉檢測以 檢測逆流之情形。第7圖為使用本實施形態之霍爾1C進行 葉輪的旋轉檢測以進行逆流檢測處理之流程圖。 首先，在步驟S21中，於供水泵22為OFF時，逆流之 ❹ 監視開始，在步驟S22中，流量計控制電路45係根據霍爾 1C 41、41之輸出，監視葉輪33是否有預定時間t3以上（例 如2秒以上）之逆轉。鍋爐水逆流時，則鍋爐水在流量計 30内會由下游侧往上游側流動，所以只要監視葉輪33有 無逆轉，即可檢測出逆流。 在步驟S22中，判斷為葉輪33有逆轉1:3秒鐘以上之 情形時，則進入到步驟23,使供水泵22驅動預定時間tl(例 如3秒鐘），進行上述的逆流之解除動作。具體言之，當流 量計控制電路45判斷為葉輪33有t3秒鐘以上之逆轉時， 11 320633 200925519 • 於步驟23中，將逆流檢測訊號輸出到鍋爐控制電路^。 於是’接收到逆流檢測訊號的鍋爐控制電路丨丨乃使供水栗 22驅動ti秒鐘。 步驟S23的解除動作之後，進入到步驟S24，確認逆 流疋否已解除。亦即，於步驟S24中，再次監視葉輪33是 ， 否有t3秒鐘以上之逆轉。於步驟S24中判斷為葉輪33有 t3秒鐘以上之逆轉時，即意味著逆流狀態尚未解除成功， ❹於是，進入到步驟S26，鍋爐控制電路11在使供水泵22 以低轉速驅動，以進行逆流解除動作之同時，使逆流發生 警報器鸣放。然後，在進入步驟S26之後，即由鍋爐的保 養維修人員等進行修理。 步驟S24中所進行的逆流是否已解除之監視，係在步 驟S25中進行預定之時間ΐ2(例如2〇秒鐘）。然後，“葉 輪.33逆轉t3秒鐘以上”之條件未達到t2秒鐘，則判斷為 迓流解除成功而進入步驟S22,繼續進行步驟S22之監視， ❹直到供水泵22下次0N為止、. 以上所詳述的第6圖及第7圖所示之處理，係藉由各 控制電路11、仏内之運算電路，執行作為控制手段之銷爐 控制電路11及流量計控制電路45内的記憶體中所儲存之 程式’即可實現。 、本實施形態中，同步進行上述之由熱阻體40所進行之 逆饥檢測與由霍爾1C 41、41所進行之逆流檢測，在供水 f OFF(步驟S11及步驟S21)後之逆流監視狀態下，根據先 刖乂步驟S12或步•驟S22撿測出逆流之處理，繼續進行步 320633 12 200925519 • 驟S13或步驟S23以後之解除處理。 根據本實施形態，除了進行依溫度之逆流檢測，同步 進行依葉輪逆轉檢測之逆流檢測，並且可對應各種逆流之 狀況，迅速且確實地檢測出逆流。 *. 例如，由於僅依溫度之逆流檢測時無法檢測知流體之 、 流向，所以為了防止供水往順向（正流方向）流動時之誤檢 測，必須在將供水泵OFF後相隔預定時間再進行溫度測 定，而使逆流檢測之開始時間延誤。相對於此，依據葉輪 〇 之逆轉檢測，則只要檢測出因逆流所導致之葉輪之逆轉， 即可檢測出逆流，所以於供水泵OFF後，亦可立刻開始進 行逆流監測。 再者，若僅靠葉輪之逆轉檢測，則當逆流量為微量而 無力使葉輪逆轉時，則無法檢測出逆流，但若依溫度進行 •'逆流檢測，則在上述情形亦可檢測出。 設置於一般的鍋爐系統之流量計，原本就為了測定流 ❹ 動於供水線的供水之流量，而設置有經磁化的葉輪及霍爾 1C。本實施形態中，將此本來就有設置的流量計的葉輪與 霍爾1C，援用到逆流檢測，以低成本即可實現利用葉輪之 逆流檢測。 而且，供水線本來就設置有供水溫度測定用之熱阻 體。將此供水溫度測定用之熱阻體，兼用為本實施形態之 逆流檢測用之感測器，因此能以低成本實現依溫度之逆流 檢測。 (變形例1) 13 320633 200925519 • 接著，說明上述實施形態之變形例。第8圖為本變形 例1之流量計之剖視圖，相當於上述實施形態之第5圖之 剖視圖。本變形例1之流量計30’係具備1個MR(Magneto Resistance，磁阻）感測器42，以替代上述實施形態中之2 ·- 個霍爾1C 41、41。其他構成與上述實施形態之流量計30 • 大致相同’所以對於相同之構成賦予相同之元件符號，並 省略其說明。 ❹ 單一之霍爾IC41僅能檢測出葉輪33之旋轉，但無法 檢測出旋轉方向’所以在上述實施形態中設置2個霍爾1C 4卜41。相對於此’若為MR感測器42，則以單一之MR感 測器42即可檢測出葉輪33之旋轉及旋轉方向。 而且，本變形例1中，因設置單一個MR感測器42 ’ 所以殼體Α31-Γ及支撐具37,之形狀與上述實施形態稍有 不同。採用MR感測器42時，依葉輪33之旋轉檢測所進行 的逆流檢測處理之流程，係與第7圖所示之流程相同。 〇 以上說明‘了本變形例1之流量計，依包括本變形例1 的流量計之鍋爐系統，則不但可獲得與上述本實施形態相 同之作用效果，且可減少零件數，使構造更加簡單化。 (變形例2) 接著說明本實施形態之變形例2。第9圖為本變形例2 之流量計之剖視圖，相當於上述實施形態的第4圖之别視 圖。本變形例2之流量計30”係採用於上述實施形態的流 量計30中再追加設置一個第2熱阻體43之構成。其他之 構成係與上述實施形態之流量計30大致相同，所以對相同 14 320633 200925519 之構成賦予相同的元件符號，並省略其說明。 第2熱阻體43係如第9圖所示，以使其感測器部分與 翼肋31a之上游側相鄰接配置之方式固定在殼體“卜丨，，的 流路内之位置。熱阻體43亦以配線46連接在流量計控制 - 電路45。本變形例2中，因設置熱阻體43，故殼體Α31-1” ' 之形狀與上述實施形態稍有不同。 本變形例2中，係設置有第1熱阻體40及第2熱阻體 ❹43作為溫度感測器’本變形例2中之依溫度進行逆流檢測 的處理之流程，係與第6圖所示之上述實施形態的處理之 流程不同。第1〇圖為本變形例2之使用2個熱阻體40、 43之依溫度進行逆流檢測的處理流程之流程圖。 首先，在步驟S31中，當供水泵22為OFF時，逆流之 監視即開始，而在步驟S32中，由流量控制電路45監視： 於第1熱阻體40所測定之溫度T5[°C]上昇之後，第2熱 阻體43所測定之溫度T6[〇C]是否有上昇。因第1熱阻體 ❹ 40位於供水線之下游測、亦即位於鍋爐本體1〇侧，而第2 熱阻體43位於上游測，所以當高溫的鍋爐水逆流於供水線 時’先是下游侧的第1熱阻體40的位置之溫度上昇，然後 上游側之第2熱阻體43的位置之溫度上昇。因而，只要監 視在第1測定温度T5上昇之後第2測定溫度T6是否有上 昇’即可檢測出鍋爐水之逆流。 在步驟S32中判斷為“T5上昇—T6上昇”時，即進入 到步驟S33，使供水泵22驅動預定時間tl(例如3秒鐘）’ 進行上述之逆流解除動作。具體言之，當流量計控制電路 15 320633 200925519 45判斷為“Τ5上昇—Τ6上昇”日夺，於步驟娜中將逆流 檢測訊號輸出到鋼爐控制電路11。接收到逆流檢測訊號的 鍋爐控制電路11即令供水泵22驅動tl和梦 韻 频S33的解除動作之後，進入到步驟%34，_、逆 ••流是否已解除。亦即，在步驟S34中再度監視， 教 ο 、阻體40所測定的溫度Τ7[ΐ]上昇之後第2熱阻體綱 定之溫度T8rC]是否有上昇。在步驟S34中判斷為“ 丁7上 昇48上昇時’則意味著逆流狀態尚未解除，所以 到步驟咖，在使供水泵22以低轉速驅動以進行逆流解除 動作之同時，使逆流發生警報器鳴放。 ， 咖後，由保養維修人員等進行修理。接著，進人到步驟 步驟S34的逆流是否已解除之監視係在步驟 預定時間m例如20秒鐘）。然後，“T7上昇—以上；7 =条件未達到t2.秒鐘，則判斷為逆流解除成功而進 〇 咖’在步驟S32中繼續監視到下次供水泵續為止。 在本變形例2亦同樣，同步進行第1Q圖中所 體40、43所進行之逆流檢測、及第7圖中所示之霍爾^ 、41所進行之逆流檢測，於供水粟_(步㈣】及步驟 )後之逆流監視狀態之中，根據先前在步驟娜或步驟 中的檢·流的處理’接著進行步驟兑3或步驟咖 Μ後之解除處理。 依據以上詳述的本變形例' 2之包括流量計的錯 2 ’則可獲得與上述實施形態相同的仙效果，並且可藉 由依溫度之逆流檢測迅速地檢測出逆流。 320633 16 200925519 • 本發明係可在不逸财料或主要特徵的範圍 以其他種種形態實施。因此，上述的實施形態或變在 所有方面只不過為例示而已，不得作為限定之解釋。本發 明之範圍係依據申請專利範圍所示者，完全不受說明書内 '容所限制。再者，屬於申請專利範圍的均等範圍之變:或 ' 變更，均為本發明之範圍内者。 例如，上述之實施形態中，雖使用熱阻體作為測定流 〇 罝計流路内溫度之溫度感測器，但當然也可以使用熱電偶 或其他溫度感測器。再者，就用以檢測經磁化之葉輪的旋 轉之磁性感測器而言，除了可使用霍爾IC或感測器之 外，亦可使用其他磁性感測器。 而且，雖將作為鋼爐控制手段的銷爐控制電路1 1、及 作為流量計控制手段的流量控制電路45設成分開的控制 電路，但亦能以單一的控制手段（控制電路）來實現雨控制 電路的功能。 〇 再者，上述實施形態中，雖將用以檢測供水線的逆流 之各種感測器設置在流量計内，但只要是在供水泵與土回 閱之間，則亦可適當地設置於供水線上的其他場所。 【圖式簡單說明】 第1圖係概略顯示本實施形態之鍋爐系統的耩成方塊 圖。 第2圖係本實施形態之流量計之前視圖。 第3圖係本實施形態之流量計之右側視圖。 第4圖係第3圖中的B-B線之剖視圖。 320633 200925519 第5圖係第2圖中的A-A線之剖視圖。 第6圖係顯示本實施形態之使用熱阻體依溫度進行逆 流檢測處理的流程之流程圖。 第7圖係顯示本實施形態之使用霍爾1C依葉輪之旋轉 ： 檢測進行逆流檢測處理的流程之流程圖。 . 第8圖係本實施形態的變形例1之流量計之剖視圖。 第9圖係本實施形態的變形例2之流量計之剖視圖。 第10圖係顯示本實施形態的變形例2之使用2個熱阻 ® 體依溫度進行逆流檢測處理的流程之流程圖。 【主要元件符號說明】 1 鋼爐糸統 10 锅爐本體 11 鍋爐控制電路 15 供水槽 20 配管 22 供水泵 23 止回閥 30 流量計 31 ' A31-：l、B31-2 殼體 31a、31b 翼肋 32 0形環 33 葉輪 35 軸承 37 支撐具 38 六角螺栓 40、43 熱阻體 41 霍爾1C 42 MR感測器 45 流量計控制電路 46 配線 18 320633200925519 - VI. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a boiler system in which heat energy obtained by burning a fuel is transferred to water to be converted into water vapor or warm water as a heat source machine, in particular: A steel furnace system for detecting the function of countercurrent in the water supply line. This case is based on the priority of the Japanese Patent Application No. 2007-316367 filed on Dec. 6, 2007, the disclosure of which is incorporated herein. [Prior Art] In general, Lai's water supply line is equipped with a check valve that prevents backflow of water. However, when a check valve is stuck in a foreign body or the like, so that the boiler water flows back, the boiler water may flow into the water supply pump, causing corrosion or cavitation, resulting in a decrease in the performance of the water supply pump, or other parts of the water supply line. Breakage occurred. Therefore, in the conventional boiler system, a sensor for detecting a backflow on the upstream side of the check valve of the water supply line is provided. For example, the patent document 1 discloses a water supply temperature detector for detecting a water supply temperature between a water supply pump and a check valve in a water supply line, and is judged to be a reverse flow when the water supply temperature rises above a predetermined value. Water supply countercurrent detection device. (Patent Document 1) Japanese Laid-Open Patent Publication No. Hei 6-341605. However, a temperature sensor is used to detect the reverse flow by temperature change, and the temperature of the steel furnace water of the high temperature is detected by the temperature, but the direction of the flow cannot be detected. Therefore, there is also a false detection when the water supply flows in the forward direction. Moreover, in order to prevent such erroneous detection to improve the detection performance, it is necessary to perform temperature measurement after a predetermined time period after the water supply pump is stopped, so that 320633 4 200925519 • Delay in detecting the time of backflow. Therefore, when a reverse flow occurs in the first time after the water supply pump is stopped, there is a problem that the reverse flow or the detection delay cannot be detected and the reverse flow cannot be prevented. SUMMARY OF THE INVENTION [Problems to be Solved by the Invention] - An object of the present invention is to provide a steel furnace system having a function of quickly and reliably detecting the reverse flow of the pin furnace water in the water supply line. [Means for Solving the Problem] 锅炉 The boiler system of the present invention includes: a water supply tank; a boiler body; a water supply line for connecting the water supply tank and the boiler body; a water supply pump installed in the water supply line; a check valve disposed on the water supply line downstream of the water pump; the boiler system includes: an impeller disposed between the water supply pump and the check valve of the water supply line; and a sense of rotation detection for detecting a rotation direction of the impeller And a control means for detecting the reverse turbulence of the boiler water from the boiler body in the water supply line by the rotation of the rotation detecting sensor. Furthermore, the boiler system of the present invention comprises: a water supply tank; a boiler body; a water supply line for connecting the water supply tank and the boiler body; a water supply pump placed on the water supply line; and a downstream side of the water supply pump a check valve for the water supply line; the boiler system includes: a first temperature sensor disposed between the water supply line of the water supply line and the check valve; the water supply pump provided on the water supply line and the first a second temperature sensor between the temperature sensors; and a countercurrent of the boiler water from the boiler body in the water supply line detected by the first (and second temperature sensor) 320633 5 200925519 Further, the flow meter of the present invention is provided in a water supply line connecting the water supply tank and the pin furnace body for measuring the flow rate of the fluid flowing through the water supply line, the flow meter having: a flow path formed therein a housing that is rotatably and rotatably fixed to the housing, and that is 捕 ^ ^ 动 动 动 动 叶轮 叶轮 叶轮 叶轮 叶轮 叶轮 叶轮 叶轮 叶轮 叶轮 叶轮 叶轮 叶轮 叶轮 叶轮 叶轮 叶轮 叶轮 叶轮 叶轮 叶轮 叶轮And the control of the counterflow of the water from the above-mentioned body in the water supply line is detected by the output of the above-mentioned rotation detecting sensor. Further, the flow meter according to the present invention is disposed in the body of the furnace connected to the water supply tank. The tree has a housing that has a flow of the above-mentioned water supply line. The flow meter has a housing in which a flow path is formed, and an i-th temperature sensing that is disposed downstream of the housing and is described as a flow path. a second thermoelectric duplexer that is disposed upstream of the casing and that is disposed upstream of the casing; and is detected by the first and second temperature sensors to detect a water supply line from the boiler According to the boiler system of the present invention, the boiler water in the line can be quickly and surely checked for backflow of the boiler water. ', Water [Embodiment] Hereinafter, the implementation of the present invention will be described in detail with reference to the drawings. First, the configuration of the boiler system of the present embodiment will be described with reference to Fig. 1. The block diagram of the boiler system of the present embodiment is schematically shown in Fig. 1. The boiler system 1 of the present embodiment is shown in Fig. 1. Furnace body 10; water supply 15; constituting the water supply tank 15 and the boiler body 1 〇 _ 3 633 6 200925519 • distribution of water supply lines η · , , 20, water supply pump 22; flow meter 30; and check valve 23. The body 10 has a kiln control circuit 11. The flow meter 30 has a flow meter control circuit 仏. As indicated by the broken line in Fig. 1, the pin furnace control fj circuit 11 is provided with wiring for the fruit 22 and the flow meter. The control circuit 45 is connected to 'and controls the operation of the water supply pump 22, and receives the flow rate of the water supply through the flow meter 3G, the temperature, and a signal indicating the backflow detection from the flow rate control circuit, -45. The various sensors of the meter 30 are connected to the φ flow rate control circuit 45 by the wiring 46. Next, the configuration of the flow meter of the present embodiment will be described with reference to Figs. 2 to 5 . In the present embodiment, various types of sensors for detecting backflow are provided in the flow meter 3A. Fig. 2 is a front view of the flow meter of the embodiment, Fig. 3 is a right side view of the flow meter of the embodiment, Fig. 4 is a cross-sectional view taken along line BB of Fig. 3, and Fig. 5 is a line AA of Fig. 2 Cutaway view. As shown in FIGS. 2 to 5, the flow meter 3 includes: a casing 31, a ring 32, an impeller 33, a bearing 35, a hexagonal bolt 38, a thermal resistor 40, and 2 Hall 1C 41 , 41 and wiring 46. The casing 31 is formed by sandwiching the 〇-shaped ring 32 and fixing the substantially cylindrical casing A 31-1 and the casing Β 31-2 coaxially by four hexagon bolts 38. In the casing 31, a flow path through which the water supply flows is formed. In the second and fourth figures, the left side is connected to the upstream side of the water supply pump 22 and the water supply tank 15, and the other side is connected to the check valve 23 and the boiler. The downstream side of the body 1〇. An impeller 33 is provided in the flow path of the casing 31, and the shaft of the impeller 33 is rotatably supported by two bearings 35 fixed to the ribs 31a, 31b of the casing 31. When the water flows in the flow path, the impeller 33 rotates. Flowing from upstream to downstream: 320633 7 200925519 • When running in a countercurrent flow from the downstream to the upstream, the impeller 33 rotates in the opposite direction. The rib 31a is integrally formed in the casing A31-1, and the rib 31b is integrally formed in the casing B31-2, and as shown in Figs. 3 to 5, three ribs are: at intervals of 120°. The housing 31 extends to the outer wall near the central axis. The wing-ribs 31a, 31b also function to rectify the fluid flowing in the flow path. As shown in Figs. 3 and 4, the thermal resistor 40 is fixed to the case body B31-2 so that the sensor portion thereof is located adjacent to the downstream side of the rib 31b in the flow path. In this way, by providing the thermal resistor 40 in the vicinity of the end portion on the downstream side of the flow meter 30, it is possible to immediately detect when the reverse flow occurs. "Of course, the position of the heat drop body 40 is not limited to the above position, but may be Free to change. For example, it may be provided inside the rib 31b. However, it is preferable not to provide a position at which the rotation characteristics of the impeller 33 are deteriorated or the pressure loss is increased. The thermal resistor 40 is connected to the flowmeter control circuit 45 by the wiring 46. The flow meter control circuit 45 calculates the enthalpy temperature in the flow path from the output signal of the thermal resistor 40, and detects the reverse flow of the boiler water by the process described later. The flow rate control circuit 45 is configured to output a backflow detection signal to the boiler control circuit 11 when the boiler water is reversely flowed. The two Halls 1C 41, 41 are supported by a resin support at a position opposed to the outer peripheral portion of the impeller 33 as shown in Fig. 5, and are 45 on the same circumference. Interval setting. The impeller 33 has four blades formed by mixing plastic and magnetic powder, and each of the blades is alternately magnetized into five poles or N poles. Therefore, when the impeller 33 rotates, the magnetic field near the Halls 1C 41, 41 is 320633 8 200925519 • The field changes, and the Hall ICs 41, 41 output a digital signal indicating the change of the magnetic field. The two Halls 1C 41 and 41 are connected to the flow rate control circuit 45 by wires 46. The flow rate control circuit 45 performs arithmetic processing based on the output signals sent from the two Halls 1C 41 and 41 to calculate the rotation of the impeller 33 and the rotational speed. From this direction of rotation, the flow of the fluid flowing in the flow path in the flow meter 30 can be detected, and the flow rate can be detected from the rotational speed. The flow rate control circuit 45 is configured to output a backflow detection signal to the boiler control circuit 11 when the boiler water of the main body 10 is reversed from the downstream side to the upstream side in accordance with the rotation direction of the impeller 33. Here, the setting positions of the Halls 1C 41, 41 are not limited to the 45° interval, and may be 135° intervals at which the same waveform output can be obtained, or the output waveforms may be different when the fluid flows in the forward direction and the reverse direction. As long as the direction of fluid flow can be detected, it can be set at any position. The configuration of the boiler system of the present embodiment has been described above. Next, the processing flow of the reverse flow detection of the present embodiment will be described with reference to the drawings. First, it is said that the temperature is detected by the thermal resistor 40 to detect the backflow. Fig. 6 is a flow chart showing the flow of the reverse flow detecting process by the temperature of the thermal resistor of the embodiment. First, in step S11, when the water supply pump 22 is OFF, the monitoring of the reverse flow is started. In step S12, the flow rate control circuit 45 monitors whether or not T22T1 + 20 °C and T22 80 °C. Here, T1 [°C] is the temperature measured by the thermal resistor 40 after a predetermined time elapses (e.g., after 6 seconds) from the water supply pump 22 in S11, and is stored in the memory in the flowmeter control circuit 45. T2 [°C] is the current temperature measured by the thermal resistor 40. Thereby, in step S12 9 320633 200925519, it is confirmed whether or not the high temperature boiler water in the boiler body 10 has a position to flow back to the thermal resistor 40. When it is determined in step S12 that T22T1 + 20 ° C and T2 is 80 ° C, the routine proceeds to step S13, and the water supply pump 22 is driven for a predetermined time t1 (for example, 3: second) to perform the reverse flow releasing operation. Specifically, in step 12:, when the flow rate control circuit 45 determines that T22T1 + 20 ° C and T2280 ° C, the backflow detection signal is output to the boiler control circuit 11 in step S13. Thus, the boiler control circuit 11 that receives the backflow detection signal causes the water pump 22 to be driven for tl seconds. The reason for the backflow of the boiler water is that the foreign matter in the check valve 23 is stuck and the unstoppable condition is excessive. Therefore, in step S13, in order to remove the foreign matter stuck in the check valve 23, the water supply pump 22 is driven for t1 seconds to cause the water supply to flow in the check valve 23 in the forward direction. After the release operation of step S13, the process proceeds to step S14, and it is confirmed whether or not the reverse flow has been canceled. That is, it is monitored again in step S14 whether it is T42T3+Q 20 °C and T4280 °C. Wherein, T3[°C] is the temperature detected by the thermal resistor 40 after the water supply pump 22 is stopped for a predetermined time (for example, after 6 seconds) after being driven for one second in step S13, and is stored in the flowmeter control circuit 45. Memory. T4[°C] is the current temperature detected by the thermal resistor 40. When it is determined in step S14 that T42T3 + 20 ° C and T4280 ° C, it means that the reverse flow state has not been released, and the process proceeds to step S16, and the boiler control circuit 11 drives the water supply pump 22 at a low rotation speed to perform the reverse flow release. At the same time as the action, the alarm is sounded in the countercurrent. Specifically, in step S14, when the flowmeter control circuit 45 determines that it is 10 320633 200925519 • T42T3+20°C and T4280°C, that is, in step S15, the second backflow detection signal is output to the boiler control circuit. 11. The boiler control circuit 11 that has received the second backflow detection signal controls the water supply pump 22 to be driven at a low rotational speed, and the alarm that generates the reverse flow is sounded. Steps: After step S16, the boiler system 1 is stopped and repaired by the maintenance personnel of the boiler. The monitoring of whether or not the reverse flow performed in step S14 has been canceled is performed in step S15 for a predetermined time t2 (for example, 20 seconds). Then, if the condition of "T4 ® 2T3 + 20 ° C and T4280 ° C" is less than t2 seconds, it is determined that the reverse flow cancellation is successful, and the process proceeds to step S12, and the monitoring of step S12 is continued until the water supply pump 22 is next 0N. So far. Next, the rotation detection of the impeller 33 by the Halls 1C 41, 41 will be described to detect the reverse flow. Fig. 7 is a flow chart showing the reverse flow detecting process by performing the rotation detection of the impeller using the Hall 1C of the present embodiment. First, in step S21, when the water supply pump 22 is OFF, the monitoring of the reverse flow is started. In step S22, the flow rate control circuit 45 monitors whether or not the impeller 33 has a predetermined time t3 based on the outputs of the Halls 1C 41, 41. The above (for example, 2 seconds or more) is reversed. When the boiler water flows backward, the boiler water flows from the downstream side to the upstream side in the flow meter 30. Therefore, as long as the impeller 33 is monitored for reversal, the reverse flow can be detected. When it is determined in step S22 that the impeller 33 has been reversed for 1:3 seconds or more, the routine proceeds to step 23 where the water supply pump 22 is driven for a predetermined time t1 (for example, three seconds) to perform the above-described reverse flow releasing operation. Specifically, when the flow meter control circuit 45 determines that the impeller 33 has reversed for more than t3 seconds, 11 320633 200925519 • In step 23, the backflow detection signal is output to the boiler control circuit ^. Thus, the boiler control circuit that receives the counter current detection signal causes the water supply pump 22 to drive for ti seconds. After the release operation of step S23, the process proceeds to step S24, where it is confirmed whether or not the reverse flow has been released. That is, in step S24, it is again monitored whether the impeller 33 is reversed for t3 seconds or more. When it is determined in step S24 that the impeller 33 has reversed for more than t3 seconds, it means that the reverse flow state has not been successfully cancelled, and then, the process proceeds to step S26, and the boiler control circuit 11 drives the water supply pump 22 at a low rotation speed to perform At the same time as the countercurrent release action, the countercurrent alarm is sounded. Then, after proceeding to step S26, the repair is performed by the maintenance personnel of the boiler or the like. The monitoring of whether or not the reverse flow performed in step S24 has been released is performed in step S25 for a predetermined time ΐ 2 (for example, 2 sec.). Then, if the condition of "the impeller 33 is reversed for more than t3 seconds" has not reached t2 seconds, it is determined that the turbulence is released successfully, and the process proceeds to step S22, and the monitoring of step S22 is continued, until the water supply pump 22 is next 0N. The processes shown in FIGS. 6 and 7 described above are performed by the control circuits 11 and the arithmetic circuits in the cymbals, and the memories in the pin furnace control circuit 11 and the flow rate control circuit 45 as control means are executed. The program stored in the body can be implemented. In the present embodiment, the above-described anti-hunting detection by the thermal resistor 40 and the backflow detection by the Halls 1C 41 and 41 are performed in synchronization, and the backflow monitoring after the water supply f OFF (steps S11 and S21) is performed. In the state, the reverse flow processing is performed according to the step S12 or the step S22, and the processing is continued in steps 320633 12 200925519 • step S13 or step S23. According to the present embodiment, in addition to the countercurrent detection by temperature, the backflow detection by the impeller reversal detection is performed synchronously, and the backflow can be detected quickly and surely in accordance with various backflow conditions. *. For example, since the flow of the fluid is not detected when the countercurrent is detected by temperature alone, in order to prevent erroneous detection when the water supply flows in the forward direction (positive flow direction), it is necessary to perform the predetermined time after the water supply pump is turned off. The temperature is measured, and the start time of the countercurrent detection is delayed. On the other hand, according to the reversal detection of the impeller ,, as long as the reverse rotation of the impeller due to the reverse flow is detected, the reverse flow can be detected, so that the backflow monitoring can be started immediately after the water supply pump is turned off. Further, if only the reverse rotation of the impeller is detected, when the reverse flow rate is small and the impeller is not reversed, the reverse flow cannot be detected. However, if the countercurrent detection is performed by the temperature, it can be detected in the above case. The flowmeter installed in a general boiler system is originally provided with a magnetized impeller and Hall 1C in order to measure the flow rate of the water supply flowing to the water supply line. In the present embodiment, the impeller and the Hall 1C of the flowmeter which are originally provided are used for backflow detection, and the counterflow detection by the impeller can be realized at low cost. Further, the water supply line is originally provided with a thermal resistor for measuring the water supply temperature. Since the thermal resistor for measuring the water supply temperature is used as the sensor for countercurrent detection of the present embodiment, the countercurrent detection by temperature can be realized at low cost. (Modification 1) 13 320633 200925519 • Next, a modification of the above embodiment will be described. Fig. 8 is a cross-sectional view showing the flowmeter of the first modification, and corresponds to a cross-sectional view of Fig. 5 of the above embodiment. The flow meter 30' of the first modification includes one MR (Magneto Resistance) sensor 42 instead of the two Halls 1C 41 and 41 in the above embodiment. The other components are substantially the same as those of the flow meter 30 of the above-described embodiment. Therefore, the same components are denoted by the same reference numerals, and their description will be omitted.单一 The single Hall IC 41 can detect only the rotation of the impeller 33, but the rotation direction cannot be detected. Therefore, in the above embodiment, two Halls 1C 4b 41 are provided. On the other hand, in the case of the MR sensor 42, the rotation and the rotation direction of the impeller 33 can be detected by the single MR sensor 42. Further, in the first modification, since the single MR sensor 42' is provided, the casing Α 31-Γ and the support 37 are slightly different in shape from the above embodiment. When the MR sensor 42 is used, the flow of the backflow detecting process by the rotation detection of the impeller 33 is the same as the flow shown in Fig. 7. According to the above-described flowmeter of the first modification, according to the boiler system including the flowmeter according to the first modification, not only the same operational effects as those of the above-described embodiment but also the number of parts can be reduced, and the structure can be made simpler. Chemical. (Modification 2) Next, a modification 2 of the embodiment will be described. Fig. 9 is a cross-sectional view showing the flowmeter of the second modification, and corresponds to a different view of Fig. 4 of the above embodiment. In the flow meter 30 of the second modification, the second heat resistor 43 is additionally provided in the flow meter 30 of the above-described embodiment. The other configuration is substantially the same as that of the flow meter 30 of the above embodiment. The same components are denoted by the same reference numerals, and the description thereof will be omitted. The second thermal resistor 43 is arranged such that the sensor portion is adjacent to the upstream side of the rib 31a as shown in Fig. 9. The method is fixed at the position inside the flow path of the housing "Di. The thermal resistor 43 is also connected to the flowmeter control-circuit 45 by a wire 46. In the second modification, since the thermal resistor 43 is provided, the shape of the case Α 31-1"' is slightly different from that of the above embodiment. In the second modification, the first thermal resistor 40 and the second heat are provided. The flow of the process of performing the backflow detection by the temperature sensor 'the temperature sensor' in the second modification is different from the flow of the process of the above-described embodiment shown in Fig. 6. The first figure is the modification. A flow chart of a process flow for performing reverse flow detection using the temperature of the two thermal resistors 40 and 43. First, in step S31, when the water supply pump 22 is OFF, the monitoring of the backflow is started, and in step S32, The flow rate control circuit 45 monitors whether the temperature T6 [〇C] measured by the second thermal resistor 43 rises after the temperature T5 [°C] measured by the first thermal resistor 40 rises. The resistance body 40 is located downstream of the water supply line, that is, on the side of the boiler body 1 and the second thermal resistance body 43 is located upstream, so when the high temperature boiler water flows back to the water supply line, the first heat on the downstream side is first. The temperature of the position of the resistor 40 rises, and then the temperature of the position of the second thermal resistor 43 on the upstream side Therefore, it is possible to detect the backflow of the boiler water by monitoring whether or not the second measurement temperature T6 has risen after the first measurement temperature T5 has risen. When it is determined in step S32 that "T5 rises - T6 rises", the process proceeds to the step. S33, the water supply pump 22 is driven for a predetermined time t1 (for example, 3 seconds) to perform the above-described reverse flow releasing operation. Specifically, when the flow rate control circuit 15 320633 200925519 45 determines that "Τ5 rises - Τ6 rises", The step Na Na will output the backflow detection signal to the steel furnace control circuit 11. The boiler control circuit 11 that receives the backflow detection signal causes the water supply pump 22 to drive the tl and the dream frequency S33 to cancel, and then proceeds to step %34, _, counter • Whether or not the flow has been released. That is, in step S34, it is monitored again, and the temperature Τ7 [ΐ] measured by the resistor 40 is raised, and the temperature T8rC] of the second heat-resistance body is increased. In the middle, it is judged that "when the rise of D4 rises to 48" means that the reverse flow state has not been released. Therefore, in the step, the water supply pump 22 is driven at a low rotational speed to perform the reverse flow release operation, and the reverse flow is performed. Health siren airing. After the coffee, repairs are carried out by maintenance personnel. Next, the monitoring to whether or not the reverse flow in step S34 has been released is in the step predetermined time m, for example, 20 seconds). Then, "T7 rises - above; 7 = the condition does not reach t2. Second, it is determined that the reverse flow release is successful, and the progress is continued in step S32 until the next water supply pump is continued. The same applies to the second modification. Synchronously performing the backflow detection performed by the bodies 40 and 43 in the first FIG. 1 and the countercurrent detection by the Halls and 41 shown in FIG. 7 after the water supply millo (step (4)) and the step) In the countercurrent monitoring state, the processing according to the previous inspection or flow in the step Na or the step 'following the step 3 or the step after the curry is performed. According to the above-described detailed description of the second embodiment including the flow meter In the second step, the same effect as the above embodiment can be obtained, and the backflow can be quickly detected by the countercurrent detection by temperature. 320633 16 200925519 • The present invention can be used in various ranges of materials or main features. The present invention is not limited by the scope of the invention, and the scope of the present invention is not limited by the scope of the patent application. Further, the change of the equal range of the patent application scope or the change is within the scope of the present invention. For example, in the above embodiment, a thermal resistance body is used as the flow path for measuring the flow meter. Temperature sensor for internal temperature, but of course thermocouple or other temperature sensor can be used. Furthermore, in the case of a magnetic sensor for detecting the rotation of a magnetized impeller, in addition to Hall IC or In addition to the sensor, other magnetic sensors may be used. Further, the pin furnace control circuit 1 as a steel furnace control means and the flow rate control circuit 45 as a flow rate control means are provided as separate control circuits. However, the function of the rain control circuit can also be realized by a single control means (control circuit). Further, in the above embodiment, various sensors for detecting the backflow of the water supply line are provided in the flow meter, but As long as it is between the water supply pump and the soil returning, it can be appropriately installed in other places on the water supply line. [Schematic description of the drawings] Fig. 1 is a schematic view showing the formation of the boiler system of the present embodiment. Fig. 2 is a front view of the flow meter of the present embodiment. Fig. 3 is a right side view of the flow meter of the present embodiment. Fig. 4 is a cross-sectional view taken along line BB of Fig. 3. 320633 200925519 Fig. 5 Fig. 6 is a cross-sectional view showing the flow of the backflow detecting process using the thermal resistor according to the present embodiment. Fig. 7 is a view showing the use of the Hall 1C by the impeller according to the present embodiment. Rotation: A flow chart for detecting the flow of the reverse flow detection process. Fig. 8 is a cross-sectional view of the flow meter according to the first modification of the embodiment. Fig. 9 is a cross-sectional view of the flow meter according to the second modification of the embodiment. Fig. 10 is a flow chart showing the flow of the reverse flow detecting process using two thermal resistance bodies in accordance with the temperature in the second modification of the embodiment. [Main component symbol description] 1 Steel furnace system 10 Boiler body 11 Boiler control circuit 15 Water supply tank 20 Pipe 22 Water supply pump 23 Check valve 30 Flowmeter 31 ' A31-:l, B31-2 Housing 31a, 31b Wing Rib 32 0-ring 33 Impeller 35 Bearing 37 Support 38 Hex bolts 40, 43 Thermal resistance 41 Hall 1C 42 MR sensor 45 Flowmeter control circuit 46 Wiring 18 320633