201142153 六、發明說明： 【發明所屬之技術領域】 本發明是有關於—綠m 種限制裝置，特別是指一種限流裝 置。 【先前技術】 許多高壓液體裝置皆需要有降壓設備，以安全地控制 高壓液體的茂流。參閱圖卜為美國公告us RE37153E號 專利案所揭露的「可調式降壓裝置」，包含-外殼U，及一 • 於該外殼11内移動的控制單元12。該外殼U具有一套管 11卜及二分別連通於該套管lu的細冑112 -細管Π2具有一入水端113,而另一細管112具有一二 端114 m水端113連接一高壓液體裝置（圖未示）。 參閱圖卜2,該控制單元12具有一導引螺桿121、一 固設於該導引螺桿⑵上的螺帽122、—螺設於該導引螺桿 121上的導引環123，及二分別固設於該導引環123 -端的 連桿124 ’所述連桿124是往遠離該導引環⑵的方向呈現 # 桿徑漸細的態樣並定義一粗端⑵，及一細端126，該導引 螺桿⑵及導引環123是伸置於該套f⑴β，且該二_ 124曰是分別伸置於所述細管112内，因此如圖3所示，所述 連桿124與相對應的細管1]2之間會分別形成—往該導引環 123的方向漸縮的通道13。 參閱圓卜3’當該控制單元12如圖3所示的處於關閉 狀態時，該導引環⑵是封擋所述細管112，此時該高壓液 體裝置内的液體無法由該人水端113流至該出水端要 201142153 開啟該控制早疋i2時，轉動該螺帽⑵而使該導引環⑵ 以導；丨螺桿121向上移動，並帶動所述連桿124向上移 動，此時除了該導㈣123不會封擋所述細管ιΐ2之外，由 於所述連桿！24的粗端125向上移動，因此所述連桿124 與、二112最上端之間會形成空隙，而讓高壓液體可以由該 # 、 、中，.田官Π 2而流經漸縮的通道13，隨 者該通道13的縮小，高㈣體_力就會逐漸減弱，再通 細管112並由該出水端114流出，而達成減低刪 力的作用。 « 然而’上述設計仍具有以τ所述的缺點： ⑴由於該導引環⑵是之外周面是呈圓環狀，因此， =使該導引環123能夠沿該導引螺桿12】向上移動，該 導引螺桿121在轉動時，該導引 亥導引％ 123勢必要於該導引螺 =上滑移但不轉動，以使所述連桿124於所述細管112 卡二::動，因此該導引環123與該套管ill之間必須有一 卡.计’以使得該導引環123不會轉動，然而，由圖干 書内容皆未揭示該卡制設計，因此合理的推測； =内Τ124伸置於所述細管112内並抵制於對應細 之内壁面上，以使所述連桿124無法轉動來作為 該導引環⑵補_卡制設計，但上μ 所 桿124產生較大的扭力，而使得所述連桿m容^ 並二該導引環123是螺設並導行於該導引螺桿⑵上， 並於該套管111内往復移動，因此 桿⑵之間’以及該導引環123與該==該導引螺 答s 111之内管壁面之 201142153 入後’容易由該導引環123與導引螺桿i2i或 由該導引環123與套管lu之内总辟品 之心壁面之間滲出，並逆流至 以控料I 12，因此需要在該螺帽122内設置多個塾另以 防止液體洩漏的問題。 ⑺在長時間使用下，可能會因為水垢或是灰塵沉積於 j官U1及所述細管112内而有阻塞的現象，然而由於該201142153 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a green m type limiting device, and more particularly to a current limiting device. [Prior Art] Many high pressure liquid devices require a pressure reducing device to safely control the flow of high pressure liquid. Referring to Fig. 2, the "adjustable pressure reducing device" disclosed in the U.S. Patent Publication No. RE37153E, includes a housing U, and a control unit 12 that moves within the housing 11. The outer casing U has a sleeve 11 and two fine tubes 112 respectively connected to the sleeve lu - the thin tube 2 has a water inlet end 113, and the other thin tube 112 has a two end 114 m water end 113 connected to a high pressure liquid device (not shown). Referring to FIG. 2, the control unit 12 has a guiding screw 121, a nut 122 fixed on the guiding screw (2), a guiding ring 123 screwed on the guiding screw 121, and two respectively The connecting rod 124 fixed to the guide ring 123 - the end of the connecting rod 124 is in a direction away from the guiding ring (2) to present a tapered diameter and define a thick end (2), and a thin end 126 The guiding screw (2) and the guiding ring 123 are extended to the sleeve f(1)β, and the two 124曰 are respectively placed in the thin tube 112, so as shown in FIG. 3, the connecting rod 124 and the phase A channel 13 which tapers in the direction of the guide ring 123 is formed between the corresponding thin tubes 1]2. Referring to the circle 3', when the control unit 12 is in the closed state as shown in FIG. 3, the guide ring (2) blocks the thin tube 112, and the liquid in the high-pressure liquid device cannot be used by the human water end 113. Flowing to the water outlet end 201142153 When the control is turned on early i2, the nut (2) is rotated to guide the guiding ring (2); the screw 121 is moved upward, and the connecting rod 124 is moved upward, in addition to the Guide (4) 123 will not block the thin tube ιΐ2, due to the connecting rod! The thick end 125 of the 24 moves upward, so that a gap is formed between the connecting rods 124 and the uppermost end of the second 112, and the high pressure liquid can flow through the tapered passage by the #, 中, 中田官Π 2 13, as the channel 13 is reduced, the high (four) body _ force will gradually weaken, and then the thin tube 112 is passed through and the water outlet end 114 flows out, thereby achieving the effect of reducing the force. « However, the above design still has the disadvantages described by τ: (1) Since the outer circumferential surface of the guide ring (2) is annular, therefore, the guide ring 123 can be moved upward along the lead screw 12] When the guiding screw 121 rotates, the guiding guide guide 120 is necessary for the guiding screw to slide upward but does not rotate, so that the connecting rod 124 is in the thin tube 112. Therefore, there must be a card between the guiding ring 123 and the sleeve ill so that the guiding ring 123 does not rotate. However, the card design is not disclosed in the contents of the drawings, so it is reasonable to speculate. The inner bore 124 extends into the thin tube 112 and resists against the corresponding inner wall surface, so that the connecting rod 124 cannot be rotated to serve as the guide ring (2) _ card design, but the upper rod 124 Producing a large torque, so that the connecting rod m is accommodated and the guiding ring 123 is screwed and guided on the guiding screw (2), and reciprocates in the sleeve 111, so the rod (2) The 'and the guide ring 123 and the == the inner wall surface of the inner wall of the guide screw s 111 are after the 'easy to be guided by the guide ring 123 The guiding screw i2i is oozing between the guiding ring 123 and the core wall surface of the inner lining of the casing lu, and flows back to the material control I 12 , so it is necessary to provide a plurality of 塾 in the nut 122 Prevent liquid leakage problems. (7) Under long-term use, there may be a blockage due to the deposition of scale or dust on the j-U1 and the thin tube 112, however
及所述細管112之間無法拆卸，因此不易進行清理 的動作，若是有阻塞的情形’只能將該裝置整體汰換，造 成成本的提高β 【發明内容】 因此’本發明之㈣’即在提供-種構件精簡且有 效提升限流效果的限流裝置。 於是，本發明限流裝置，包含一外殼，及一於該外殼 内移動的控制單元。 該外殼包括-中空狀殼體、一形成於該殼體上的入液 口、一形成於該殼體上且間隔於該入液口的出液口，及一 由該入液口伸置於該殼體内的入液管，其中，該殼體具有 一内壁®’該入液管是間隔於該内壁面，並與該内壁面共 同界定出一連通該出液口的出液流道。 該控制單元包括一樞設於該殼體相反於該入液口之一 侧的樞轉件，及一固設於該樞轉件上且由該樞轉件轉動帶 動而相對於該入液管往復移動的控制件，其中，該控制件 具有一螺設於該樞轉件上且呈多邊形的導塊、一由該導塊 201142153 帶動移動的封擋塊、一固設於該封擋塊上且由該封擋塊帶 動而於該出液流道内往復移動的套管，及一固設於該封擋 塊上並位於該套管内且由該封擋塊帶動而於該入液管内往 復移動的連桿，其中，該連桿的桿徑是由該導塊往該入液 管的方向漸縮，而該入液管的管壁厚度是由該入液口往該 導塊的方向漸縮，且該殼體的部分内壁面是對應該導塊形 成多邊形而供該導塊滑移。 本發明之功效在於，透過該導塊及該殼體部分内壁面 形成多邊形’因此不需要其他的卡制設備，就能使該導塊 不會轉動而滑移於該殼體内，且該封擋塊的設計，使得高 壓液體即使由該入液管洩漏至該套管與連桿之間，也會受 到該封擋塊的阻擋而減少高壓液體逆流的問題，同時也能 減少墊片的設置數量’而有精簡構件的效果。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之一個較佳實施例的詳細說明中，將可 清楚的呈現。 參閱圖4,為本發明限流裝置2之較佳實施例，用以將 高壓液體降壓後釋出，該限流裝置2包含一外殼3，及一於 該外殼3内移動的控制單元4。 ' 參閱圖5,該外殼3包括—中空狀殼體31、一形成於 該殼體31上的入液口 32、一形成於該殼體31上且間隔於 該入液口 32的出液口 33’及一由該入液口 田-¾八戍口 32伸置於該殼 體31内的入液管34,高壓液體是由該入液管34進入。其 201142153 中，該殼體31具有一内壁面311 且該殼體31界定有一形 成有該入液口 32及出液 一段312的第二段313， 口 33的第一段312,及一連接該第 該第二段313的内徑是大於該第一 段312的内徑， 部分的放大圖， 隔於該内壁面3 11 如圖5、6所示，圖ό為圖5中假想線框示 該入液管34是伸置於該第一段312内並間 出液口 33的出液流道35。 ’並與該内壁面311共同界定出一連通該And the thin tube 112 cannot be disassembled, so that it is difficult to perform the cleaning operation. If there is a blockage, the device can only be replaced as a whole, resulting in an increase in cost. [Invention] Therefore, the "fourth invention" of the present invention is A current limiting device is provided that is compact and effectively enhances the current limiting effect. Accordingly, the current limiting device of the present invention includes a housing and a control unit that moves within the housing. The outer casing comprises a hollow casing, a liquid inlet formed on the casing, a liquid outlet formed on the casing and spaced apart from the liquid inlet, and a liquid inlet extending from the inlet a liquid inlet tube in the housing, wherein the housing has an inner wall®' which is spaced apart from the inner wall surface and defines an outlet flow path communicating with the liquid outlet port together with the inner wall surface. The control unit includes a pivoting member pivoted on a side of the housing opposite to the liquid inlet, and is fixed to the pivoting member and driven by the pivoting member to be opposite to the liquid inlet tube a control member for reciprocating movement, wherein the control member has a polygonal guide block screwed on the pivoting member, a blocking block driven by the guiding block 201142153, and a fixing block fixed on the blocking block And a sleeve driven by the blocking block to reciprocate in the liquid outlet channel, and a sleeve fixed on the sealing block and located in the sleeve and driven by the blocking block to reciprocate in the liquid inlet tube a connecting rod, wherein a rod diameter of the connecting rod is tapered from the guiding block toward the liquid inlet tube, and a thickness of the tube wall of the inlet tube is tapered from the liquid inlet port toward the guiding block And a part of the inner wall surface of the casing is formed by forming a polygon corresponding to the guide block for the guide block to slip. The effect of the invention is that a polygonal shape is formed through the guide block and the inner wall surface of the housing portion, so that no other clamping device is required, so that the guide block can be slid into the housing without rotating, and the seal is The design of the stopper is such that even if the high-pressure liquid leaks between the casing and the connecting rod, the high-pressure liquid is blocked by the blocking block, thereby reducing the problem of backflow of the high-pressure liquid, and also reducing the setting of the gasket. The quantity 'has the effect of streamlining the components. The above and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. Referring to FIG. 4, a preferred embodiment of the current limiting device 2 of the present invention is used to release the high pressure liquid after the pressure is reduced. The current limiting device 2 includes a casing 3 and a control unit 4 that moves within the casing 3. . Referring to FIG. 5, the outer casing 3 includes a hollow casing 31, a liquid inlet 32 formed on the casing 31, and a liquid outlet formed on the casing 31 and spaced apart from the liquid inlet 32. 33' and a liquid inlet pipe 34 extending from the inlet port - 3⁄4 port 32 into the casing 31, through which the high pressure liquid enters. In its 201142153, the housing 31 has an inner wall surface 311 and the housing 31 defines a second section 313 formed with the liquid inlet 32 and the liquid discharge section 312, a first section 312 of the port 33, and a connection The inner diameter of the second segment 313 is larger than the inner diameter of the first segment 312, and an enlarged view of the portion is separated from the inner wall surface 3 11 as shown in FIGS. 5 and 6. The figure is an imaginary line frame in FIG. The liquid inlet pipe 34 is an outlet flow path 35 that extends into the first stage 312 and between the liquid outlets 33. And defining a communication with the inner wall surface 311
參閱圖5，该控制單元4包括一拖設於該殼體η之第 二段313上的枢轉件41，及一固設於該樞轉件41上且由該 樞轉件41轉動帶動而相對於該入液管34往復移動的控制 件42。戎樞轉件41具有一樞設於該殼體3丨的封蓋4 i丨，及 一穿设固定於該封蓋411上且伸置於該殼體31之第二段 313内的螺桿412。 該控制件42具有一螺設於該螺桿412上且呈多邊形的 導塊421、一由該導塊421帶動移動的封擋塊422、一固設 於該導塊421與封擋塊422之間且滑移地環繞該螺桿412 的軸套423、一固設於該封擋塊422上且由該封擋塊422帶 動而於該出液流道35内往復移動的套管424，及一固設於 該封擔塊422上並位於該套管424内且由該封擋塊421帶 動而於該入液管34内往復移動的連桿425，其中，該連桿 425的桿徑是由該封擋塊422往該入液管34的方向漸縮， 而該入液管34的管壁厚度是由該入液口 32往該封擋塊422 的方向漸縮。 另外’該殼體31之第二段313的内壁面311是對應該 201142153 導塊421形成多邊形而供該導塊421滑移。於本實施例中 ，該導塊421呈六邊形，而該殼體31之第二段313的内壁 面311也是對應該導塊421而呈六邊形。 參閱圖5、6 ’當該控制單元4為關閉狀態時，該控制 件42的封擋塊422是封擋該入液管34並頂抵於該殼體31 的第一段312上，由於該連桿425的桿徑是由該封擋塊422 往該入液管34的方向漸縮，而該入液管34的管壁厚度是 由該入液口 32往該封擋塊422的方向漸縮，因此在關閉狀 態下，等於是使該連桿425較粗的一側與該入液管34管壁 較厚的一側互相接觸’而使該連桿425與該入液管34之間 疋呈現接近密閉的狀態，此時高壓液體無法通過該入液管 3 4 〇 參閱圖7，當要開啟該控制單元4時，是旋轉該封蓋 11使。玄封蓋411帶動該螺桿412轉動，而使該導塊421 於該螺# 412上往靠近該封蓋411的方向滑移，並同步帶動 該軸套423、封擋塊422、套管424，及連桿425往靠近該 封蓋4U的方向移動，當該導塊421靠抵於該封蓋4ιι上時 ’就達到完全開啟的狀態。 叮食阅圖 圃8為圖7中假想線框示部分的 圖，此時該連桿425車交細的—側是相鄰於該入液管34 2相—側，因此該連桿425與該入液管34之間形成 3ΛΓ液流道35的通道36,當高壓液體由該入液 由入< ’就能經由該通道36流至該出液流道35,並 由該出液口 33流出。 201142153 據此，使用者即可藉由旋轉該封蓋411來調整該連桿 425與忒入液管34之間的空隙大小以調整高壓液體之流 量’進而控制該高壓液體之輸出壓力。 藉由上述設計，本發明限流裝置2於實際使用時具有 以下所述的優點： (1) 不易產生斷裂的情形： 該限流裝置2是直接利用該導塊421配合該殼體 31内壁面311的形狀進行限位導行的作用，因此較不 易對其他構件產生壓力，相對的也減少其他構件因為 扭力而產生斷裂的情形。 (2) 封閉效果好： 在尚壓液體由該入液管34進入，並經由該連桿 425與入液管34之間的通道36流至該出液流道35的 過程中，若咼壓液體因為壓力而有部分喷流至該套管 424與該連桿425之間時，由於該套管424與連桿425 皆是固設於該封擋塊422上，因此高壓液體也會被該 封擋塊422擔止，而減少高壓液體逆流的問題。 (3) 構件較為精簡： 承上所述，透過該導塊421及該殼體31内壁面 311配合形成多邊形，因此不需要其他的卡制設備，就 能使該導塊421不會轉動而滑移於該殼體31内，且該 封擋塊422的设δ·}·，使得高壓液體會受到該封檔塊422 的阻擋而減少高壓液體逆流的問題，同時也能減少塾 片的設置數量’而有精簡構件的效果。 9 201142153 (4)易於拆卸清洗： 透過本發明的設計，該封蓋411、螺桿412、導塊421 、封撞塊422、轴套423、套管424，及連桿425是可以由 該殼體31靠近該封蓋411的一端拆離，而該入液管34也是 可以由該殼體靠近該入液口 32的一端拆離，因此可以 輕易地對各元件進行清洗的動作，待清洗完成後又能重新 組裝繼續使用，相當便利且節省成本。 综上所述，本發明限流裝置2，透過該導塊421與該殼 體31内壁面311的形狀設計來做為限位導行的機構，不但 不易產生斷裂的情形、構件精簡，且該封擋塊422、套管 424，及連桿425的設計，除了能達成將液體減壓的效果之 外’也能防止液體逆流的情形，故破實能達成本發明之目 的。 准乂上所述者，僅為本發明之較佳實施例而已，當不 能以此限定本發日月實施之範圍，即大凡依本發明巾請專利 範圍及發明說明内容所作之簡單的等效變化與修飾，皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是立體圖’說明美國公告us RE37⑸E號專利 案所揭露的「可調式降壓裝置」； 圖2疋—立體圖，⑨明該可調式降壓裝置中控制單元 的整體態樣， 圖3疋一部分剖視圖，輔助說明圖1 ; 圖4疋立體圖，說明本發明限流裝置的較佳實施例 10 201142153 ' 圖5是一剖視圖，輔助說明該較佳實施例處於關閉的 狀態； 圖6是一部分剖視圖，說明圖5中假想線框示部分的 放大圖； 圖7是一剖視圖，輔助說明該較佳實施例處於開啟的 狀態；及 圖8是一部分剖視圖，說明圖7中假想線框示部分的 籲 放大圖。 11 201142153 【主要元件符號說明】 2 限流裝置 4 控制單元 3 外殼 41 枢轉件 31 殼體 411 封蓋 311 内壁面 412 螺桿 312 第一段 42 控制件 313 第二段 421 導塊 32 入液口 422 封擋塊 33 出液口 423 軸套 34 入液管 424 套管 35 出液流道 425 連桿 36 通道 12Referring to FIG. 5, the control unit 4 includes a pivoting member 41 that is dragged onto the second section 313 of the housing η, and is fixed to the pivoting member 41 and driven by the pivoting member 41. The control member 42 reciprocates relative to the inlet pipe 34. The pivoting member 41 has a cover 4 枢 pivoted to the housing 3丨, and a screw 412 extending through the cover 411 and extending into the second section 313 of the housing 31. . The control member 42 has a polygonal guide block 421 screwed onto the screw 412, and a blocking block 422 driven by the guiding block 421. The fixing member 42 is fixed between the guiding block 421 and the blocking block 422. And a sleeve 423 that is slidably disposed around the screw 412, a sleeve 424 fixed to the blocking block 422 and driven by the blocking block 422 to reciprocate in the liquid outlet passage 35, and a solid a connecting rod 425 disposed on the sealing block 422 and located in the sleeve 424 and driven by the blocking block 421 to reciprocate in the liquid inlet tube 34, wherein the rod diameter of the connecting rod 425 is The blocking block 422 tapers in the direction of the liquid inlet tube 34, and the wall thickness of the liquid inlet tube 34 is tapered from the liquid inlet 32 to the blocking block 422. Further, the inner wall surface 311 of the second section 313 of the casing 31 is formed into a polygon corresponding to the 201142153 guide block 421 for the guide block 421 to slip. In this embodiment, the guide block 421 has a hexagonal shape, and the inner wall surface 311 of the second section 313 of the housing 31 is also hexagonal in correspondence with the guide block 421. Referring to Figures 5 and 6 'When the control unit 4 is in the closed state, the blocking block 422 of the control member 42 blocks the liquid inlet tube 34 and abuts against the first segment 312 of the housing 31. The rod diameter of the connecting rod 425 is tapered by the blocking block 422 toward the liquid inlet tube 34, and the thickness of the tube wall of the liquid inlet tube 34 is gradually changed from the liquid inlet 32 to the blocking block 422. Shrinking, so in the closed state, it is equal to making the thicker side of the connecting rod 425 and the thicker side of the wall of the inlet pipe 34 contact each other', and between the connecting rod 425 and the liquid inlet pipe 34 The crucible is in a state of being close to a closed state, at which time high pressure liquid cannot pass through the infusion tube 34. Referring to Fig. 7, when the control unit 4 is to be opened, the cover 11 is rotated. The cover 411 rotates the screw 412, and the guide block 421 slides on the screw 412 in the direction of the cover 411, and simultaneously drives the sleeve 423, the block 422, and the sleeve 424. And the connecting rod 425 moves in a direction close to the cover 4U, and when the guide block 421 abuts against the cover 4, it reaches a fully open state.叮 阅 圃 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 425 425 425 425 425 425 425 425 425 425 425 425 425 425 425 425 425 425 425 425 425 425 425 425 425 A passage 36 of the liquid passage 35 is formed between the liquid inlet tubes 34, and the high pressure liquid can flow through the passage 36 to the liquid discharge passage 35 through the liquid inlet, and the liquid outlet port 33 outflow. According to this, the user can adjust the flow rate of the high pressure liquid by rotating the cover 411 to adjust the gap between the connecting rod 425 and the intrusion liquid pipe 34 to control the output pressure of the high pressure liquid. With the above design, the current limiting device 2 of the present invention has the following advantages when it is actually used: (1) A case where the fracture is not easily generated: The current limiting device 2 directly uses the guide block 421 to fit the inner wall surface of the casing 31. The shape of the 311 acts as a limit guide, so that it is less likely to generate pressure on other members, and relatively reduces the occurrence of breakage of other members due to the torsion. (2) The sealing effect is good: when the pressurized liquid enters through the liquid inlet pipe 34, and flows through the passage 36 between the connecting rod 425 and the liquid inlet pipe 34 to the liquid discharge passage 35, if the pressure is pressed When the liquid partially flows between the sleeve 424 and the connecting rod 425 due to the pressure, since the sleeve 424 and the connecting rod 425 are both fixed on the blocking block 422, the high pressure liquid is also The blocker 422 acts to reduce the problem of counterflow of the high pressure liquid. (3) The member is relatively compact: as described above, the guide block 421 and the inner wall surface 311 of the housing 31 are combined to form a polygon, so that the guide block 421 can be prevented from rotating and slipping without requiring other clamping devices. Moving in the housing 31, and the setting of the blocking block 422 is such that the high-pressure liquid is blocked by the blocking block 422 to reduce the problem of backflow of the high-pressure liquid, and also reduces the number of the blades. 'And there are effects of streamlining components. 9 201142153 (4) Easy to disassemble cleaning: Through the design of the present invention, the cover 411, the screw 412, the guide block 421, the blocking block 422, the sleeve 423, the sleeve 424, and the connecting rod 425 can be made of the housing 31 is detached from one end of the cover 411, and the liquid inlet pipe 34 can also be detached from the end of the casing close to the liquid inlet 32, so that the components can be easily cleaned after the cleaning is completed. It can be reassembled and used continuously, which is quite convenient and cost effective. In summary, the current limiting device 2 of the present invention is designed to be a limiting guide through the shape of the guiding block 421 and the inner wall surface 311 of the housing 31, and is not easy to be broken, and the component is simplified. The design of the blocking block 422, the sleeve 424, and the connecting rod 425 can prevent the liquid from flowing back in addition to the effect of decompressing the liquid, so that the object of the present invention can be achieved by breaking. The above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the implementation of the present invention, that is, the simple equivalent of the patent scope and the description of the invention according to the invention. Variations and modifications are still within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing the "adjustable pressure reducing device" disclosed in the US Patent Publication No. RE37(5)E; FIG. 2 is a perspective view showing the overall state of the control unit in the adjustable pressure reducing device. Figure 3 is a cross-sectional view of a preferred embodiment of the present invention. Figure 4 is a cross-sectional view of the preferred embodiment of the present invention. Figure 6 is a partial cross-sectional view showing an enlarged view of a portion of the imaginary line in Figure 5; Figure 7 is a cross-sectional view for explaining the state in which the preferred embodiment is in an open state; and Figure 8 is a partial cross-sectional view showing the imaginary line in Figure 7 A magnified view of the framed part. 11 201142153 [Description of main components] 2 Current limiting device 4 Control unit 3 Housing 41 Pivot member 31 Housing 411 Cover 311 Inner wall surface 412 Screw 312 First segment 42 Control member 313 Second segment 421 Guide block 32 Inlet port 422 Blocking block 33 Outlet port 423 Bushing 34 Inlet pipe 424 Sleeve 35 Outlet flow path 425 Connecting rod 36 Channel 12