200931217 六、發明說明： 發明領域 本發明係有關於一種可限制調整之壓力之上限之壓力 5 調整閥。 【先前技術】 發明背景 習知，將形成於1次側流體流入之流入側流路與2次侧 φ 流體流出之流出侧流路間之閥座，以與藉1次側流體或2次 ίο 側流體之壓力而變形之隔膜連動之閥體開關，藉此，調整 壓力之壓力調整閥係使用調整1次側流體之壓力之背壓閥 或調整2次側流體之壓力之減壓閥。（參照專利文獻1) - 如此構成之壓力調整閥若為減壓閥時，當2次側流體之 壓力降低時，閥體離開閥座，流入侧流路與流出側流路連 15 通’流體從1次側流至2次側，調整按壓隔膜之彈簧之伸縮 狀態，以調整設定壓力。 參 關於此種壓力調整閥，在jISB68〇3(相當於IS〇25〇3)， 處理乙快氣體時’規定應設計製作成2次側之壓力不超過 〇‘15MPa’ X ’處理氧氣時’規定應以壓力調整手柄，使彈 20 簧密合，而不致形成棒狀。 [專利文獻1】日本專利公開公報平7_12245號 L發明内容 發明揭示 發明欲解決之課題 3 200931217 然而，當壓力調整閥之調整手柄脫落時， 度不同之另一壓力調整閥之調整手柄來取代預定之手柄， 過度按壓隔膜時’調整之壓力上限產生變化，有無法確實 限制上限壓力之可能性之問題。 又，當要限制彈簧之壓縮長度時，—般構造變複雜， 零件件數增加，有加工成本或組裝成本增加，且需要用以 將上限壓力限定在預定壓力之調整之問題。 本發明即是鑑於此種情況而發明者，其目的係提供〜 10 15 20 種可以簡單構造，將可調整流體之壓力之上限限制在預 之上限壓力之壓力調整閥。 用以欲解決課題之手段 為解決上述課題，本發明提出以下手段。 膜、為—種壓力調整閥，其包含有蓋體、殼體、隔 :::菁、漏構件、調整螺絲，該蓋體係一端例 螺分二:且於另―_設置壁部’於該壁部形成陰 侧流路’ r體係配置於前述蓋體之開口部側，具有流入 側流路出側流路、形成於前述流入側流路與前述流出 間二二閥座者；該隔膜係配置於前述蓋體與前述殼體 力來變r I述紅侧流路側或前述流出側流路侧之流體摩 前膜者’·該㈣構件係配置於前述彈菁之 紋螺合而進退之=二側者；該調整螺絲係可於前述陰螺 退藉由别述按壓構件，調整前述彈簧之按壓 200931217 5 ❹ 10 15 20 力者；前述蓋體與前述壁部形成一體，並且於周壁部形成 於前述彈簧之伸縮方向延伸，貫穿前述蓋體内部與外部之 貫穿孔，前述貫穿孔係作為前述一端側與形成於前述按壓 構件之被抵接片抵接，而限制前述彈簣壓縮預定量以上之 第1抵接部。 根據本發明之壓力調整閥，調整流體之設定壓力時， 藉按壓構件抵接第1抵接部，而限制按壓構件將隔膜按壓至 對應於上限壓力之按壓力以上，而可防止因調整螺絲之過 度鎖緊，調整之流體壓力之上限超過預定之上限壓力，且 可防止彈簧因調整螺絲之過度鎖緊而密合。 又，由於第1抵接部形成蓋體之貫穿孔，故易將按壓構 件組裝至蓋體，且易從蓋體外部確認彈簧之作動狀況。 又，由於於設置在蓋體之另一端側之壁部形成陰螺 紋，此壁部與抵接部形成一體，故可正確地調整彈簧之伸 長範圍，並且可確實地維持上限壓力。 又，由於壁部一體地形成於蓋體，故可防止按壓構件 脫離至蓋體外部。 又，在壓力調整閥中，前述貫穿孔亦可作為前逑另— 端側與形成於前述按壓構件之被抵接片抵接，而限制前述 彈簧伸長預定量以上之第2抵接部。 根據本發明壓力調整閥，由於被抵接片與第丨抵接部及 第2抵接片抵接，限制彈簧之伸縮衝程’故可將壓力調整閥 之壓力調整範圍限制壓預定之範圍内。 又，在壓力調整閥中，前述按壓構件亦可具有配置於 5 200931217 前述彈簧内周，限制前述彈簧之橫向偏離之凸部。 根據本發明之壓力調整閥，由於按壓構件具有配置、 前述彈簧内周，限制前述彈簧之橫向偏離之凸部，=二於 彈簧穩定地伸縮，而可穩定地進行上限壓力之維持及°吏 5調整。 、壓力 發明效果 根據本發明之壓力調整閥，可防止按壓構件脫離至蓋 體外部，並且可將流體壓力確實地限制在預定上限壓力以 下。 1〇 圖式簡單說明 第1圖係顯示本發明一實施形態之減壓閥之縱載面圖。 第2圖係顯示本發明一實施形態之減壓閥之蓋體及按 壓構件之概略者。 第3圖係顯示第2圖之ΙΠ-ΠΙ截面者。 15 第4圖係顯示本發明一實施形態之按壓構件概略之側 面圖。 第5A圖係顯示本發明一實施形態之減壓閥之作用者， 顯不按壓構件未抵接抵接部之狀態之縱截面圖。 2〇 第5B圖係顯示本發明一實施形態之減壓閥之作用者， 顯不按壓構件抵接抵接部之狀態之縱截面圖。 【貧施冷式】 用以實施發明之最佳形態 以下’依第1圖至第5B圖，就減壓閥1作說明。 第1圖係顯示本發明一實施形態之壓力調整閥者，標號 200931217 1係將乙炔氣體之壓力減壓之減壓閥（壓力調整閥）’上限壓 力為0.15MPa。 5 ❹ 10 15 ❹ 20 如第1圖所示，減壓閥1包含有殼體1〇、蓋體202、壓力 調整機構30、手柄4〇，壓力調整機構30具有閥體31、32、 調整彈簧（彈簧)33 '托盤34、按壓構件39、調整螺絲36、桿 37。 殼體10與蓋體202之開口部20A側連結，於殼體1〇與蓋 體202間配置隔膜32。 殼體10由黃銅等金屬構成，形成1次侧流體流入之流入 側流路12、2次側流體流出之流出側流路丨4、連通流入側流 路12與流出側流路14之連通流路16、凹部17，凹部17以導 孔14C與流出側流路14連通。 流入侧流路12具有形成用以連接接頭等之陰螺紋，一 端於殼體10之外部開口之第1流入側流路12 A、使第1流入側 流路12 A與連通流路16連通之第2流入侧流路12 B。 流出側流路14具有形成用以連接接頭等之陰螺紋，一 端於殼體10之外部開口之第1流出側流路14A、使第2流出側 流路14A與連通流路16連通之第2流出侧流路14B。 連通流路16配置成與調整彈簧33之轴線01同轴，具有 截面圓形之大徑孔16A及小徑孔丨66，於連接大徑孔16A及 小徑孔16B之大徑孔16A之底部形成從小徑孔16B之周緣部 突出至大徑孔16A侧之環狀凸部，此環狀凸部作為藉閥體3 j 開關之閥座16C。 於大徑孔16A從閥座16c依序收納閥體31、按壓彈簧 7 200931217 19,閥體31於軸線01方向移動自如，並且以按壓彈菁隱 壓至閥座16C側，可藉閥體31，開關閥座16(：。 小徑孔16B形成將大徑孔16A與凹部17連通，小徑孔 16B將桿37以可於軸線01方向移動之狀態收納且構成連 5 通流入側流路12與流出側流路14之流路之一部份。 凹部17於蓋體202侧開口，以隔膜32覆蓋，藉由導孔MC 流入至凹部17之2次側流體之壓力施加於隔膜32。 如第2圖、第3圖所示，蓋體202係按麼構件收納部24B 及彈簧收納部28B由圓筒形狀之第丨凹部21B構成於按壓 1〇構件收納部24B之周壁部形成1對(2條)相對於軸線〇丨對稱 地於軸線οι方向延伸之寬度％丨之貫穿孔2〇2A，於貫穿孔 202A之開口部20 A侧（另一端側）之壁面形成第丨抵接部25β。 貫穿孔202A之與在轴線〇 1方向之抵接部25b相對之側 (一端側）之壁面係作為第2抵接部25C。 15 蓋體202之一端側作為開口部20Λ，另一端側形成壁部 20B ’而呈封閉之有底多段圓筒狀’内周側具有收納調整彈 普33之第1凹部21、位於第1凹部21之開口部2〇A側，較第1 凹部21大徑之第2凹部22,於第2凹部22之開口部20A側形成 用以與殼體10連結之螺絲。 20 壁部20B以鑄造或機械加工之切削而一體形成為蓋體 202之一部份，於中央部形成與調整彈簧33之軸線〇1同軸之 陰螺紋26，於陰螺紋26螺合調整螺絲36。 陰螺紋26係藉於壁部20B施行機械加工，而與蓋體202 形成一體。 200931217 此外，陰螺紋亦可構造成將壁部2〇Β及經螺紋加工與壁 部20Β分開之構件嵌插或以不脫落之狀態裝設於壁部 20Β，此時，用以設置形成有陰螺紋26之構件之孔形成為即 5 Ο 10 15 ❹ 使此構件脫落時，按壓構件39亦不致從蓋體202脫離至外邊 之尺寸、形狀。 隔膜32為具彈力性之圓形平板狀金屬板，於與平板狀 面垂直相交之方向膨脹自如，於中央部連結用以與閥體31 連結或連動之桿37，且外周部為殼體1〇及蓋體2〇2所夾持， 配置成覆蓋殼體10之凹部17之開口部。 隔膜32藉以導孔與流出側流路14連通之凹部17内之壓 力，於轴線方向膨脹。 調整彈簧33於軸線〇ι方向伸縮自如，且收納於彈簧收 納部28Β，一端侧藉由托盤34,支撐於隔膜32，另一端側藉 由按壓構件39，支撐於調整螺絲36。 又，調整彈簧33藉2次側流體壓力降低而伸長，使隔膜 32於凹部17側膨脹，並且藉提高2次側流體之壓力而壓縮， 此隔膜32之變形藉由連結構侔32Α、桿37,傳達至閥體η。 結果，閥體31與隔膜32之變形連動而移動，而開關閥 座 16C。 托盤34平面觀看呈圓形，具有周緣部平緩上升之壁 部，配置於隔膜32之調整彈簧33側，承接調整彈簧之— 端側，以隔著隔膜32，配置於托盤34之反對側之連并構件 32Α之螺絲，安裝於隔膜32。 如第4圖所示，按壓構件39呈具有小徑凸部35八之多俨 20 200931217 圓板狀，於小徑凸部35A之反侧之端面形成支撐調整螺絲36 之支撐凸部36A的約略圓錐形凹部35B，而可於小徑凸部 35A之外周配置調整彈簧33之另一端側之内周。 又，於前述按壓構件39之中心對稱之位置形成一對延 5 伸至徑方向外邊之寬度W2之被抵接片39A、39B。此被抵接 片39A及被抵接片39B亦可為不同之形狀，而在此實施形態 中，為相同之形狀。 又，藉按壓構件39之被抵接片39A、39B與形成於貫穿 孔202A之第1抵接部25B抵接’而可限制調整彈簧33壓縮預 10 定量以上。 又，按壓構件收納部24B形成可改變按壓構件39可將調 整彈簧38按壓至轴線〇1方向之姿勢、亦即按壓構件39之轴 線可於軸線01方向改變姿勢之尺寸。 舉例言之，按壓構件39之最大徑DA、最大徑DA部份 15 之厚度LA、連結被抵接片39A、39B之各外周（最大尺寸部 份）之長度LC、寬度W2、蓋體202之内周壁之最小徑（相當 於彈簧收納部28B之内徑)D21(D1)、貫穿孔202A之寬度W係 呈 DA<D21<LC，W2<W1。200931217 VI. INSTRUCTIONS OF THE INVENTION: Field of the Invention The present invention relates to a pressure regulating valve that limits the upper limit of the adjusted pressure. [Prior Art] BACKGROUND OF THE INVENTION It is known to form a valve seat between an inflow side flow path of a primary side fluid inflow and an outflow side flow path of a secondary side φ fluid outflow, with a secondary side fluid or 2 times. The valve body switch in which the diaphragm is deformed by the pressure of the side fluid, whereby the pressure regulating valve for adjusting the pressure is a pressure reducing valve that adjusts the pressure of the primary fluid or a pressure reducing valve that adjusts the pressure of the secondary fluid. (Refer to Patent Document 1) - When the pressure regulating valve configured as described above is a pressure reducing valve, when the pressure of the secondary fluid is lowered, the valve body is separated from the valve seat, and the inflow side flow path and the outflow side flow path are connected to each other. The tension state of the spring that presses the diaphragm is adjusted from one side to the second side to adjust the set pressure. Refer to this type of pressure regulating valve, in jISB68〇3 (equivalent to IS〇25〇3), when handling B fast gas, the specified pressure should be designed so that the pressure on the secondary side does not exceed 〇'15MPa' X 'When treating oxygen' It is stipulated that the handle should be adjusted with pressure so that the spring 20 is tightly closed without forming a rod shape. [Patent Document 1] Japanese Patent Laid-Open Publication No. Hei 7-12245. SUMMARY OF THE INVENTION The present invention discloses a problem to be solved by the invention. 3 200931217 However, when the adjustment handle of the pressure regulating valve is detached, the adjustment handle of another pressure regulating valve having a different degree is substituted for the predetermined one. The handle, when the diaphragm is over pressed, the upper limit of the pressure of the adjustment changes, and there is a possibility that the possibility of the upper limit pressure cannot be surely limited. Further, when the compression length of the spring is to be restricted, the general structure becomes complicated, the number of parts increases, there is an increase in processing cost or assembly cost, and the problem of adjusting the upper limit pressure to a predetermined pressure is required. The present invention has been made in view of such circumstances, and an object of the invention is to provide a pressure regulating valve which can be easily constructed to limit the upper limit of the pressure of the adjustable fluid to a predetermined upper limit pressure. Means for Solving the Problems In order to solve the above problems, the present invention proposes the following means. The membrane is a pressure regulating valve, which comprises a cover body, a casing, a partition: a cyanine, a drain member, an adjusting screw, and one end of the cap system is divided into two: and the other wall is disposed on the wall. The portion forming the female side flow path 'r system is disposed on the opening side of the lid body, and has an inflow side flow path side flow path, and is formed in the inflow side flow path and the outflow between the two valve seats; In the above-mentioned cover body and the above-mentioned housing force, the fluid front surface of the red side flow path side or the outflow side flow path side is formed by the above-mentioned cover member, and the (four) member system is disposed in the above-mentioned elastic crystal, and is advanced and retracted. The adjusting screw is configured to adjust the pressing force of the spring by the pressing member 200931 17 5 5 10 10 20 20 in the above-mentioned female screw; the cover body is integrally formed with the wall portion, and is formed on the peripheral wall portion The spring extends in a direction in which the spring extends, and penetrates through the through hole in the inside and the outside of the cover body, and the through hole is abutted against the contact piece formed on the pressing member as the one end side, thereby restricting the amount of compression of the magazine by a predetermined amount or more. The first abutment. According to the pressure regulating valve of the present invention, when the set pressure of the fluid is adjusted, the pressing member abuts against the first abutting portion, and the pressing member is restricted to press the diaphragm to a pressing force corresponding to the upper limit pressure, thereby preventing the adjusting screw Excessive locking, the upper limit of the adjusted fluid pressure exceeds the predetermined upper limit pressure, and the spring is prevented from coming into contact due to excessive locking of the adjusting screw. Further, since the first abutting portion forms the through hole of the lid body, the pressing member can be easily assembled to the lid body, and the state of the spring can be easily confirmed from the outside of the lid body. Further, since the wall portion is formed on the wall portion provided on the other end side of the lid body, the wall portion is integrally formed with the abutting portion, so that the extension range of the spring can be accurately adjusted, and the upper limit pressure can be surely maintained. Further, since the wall portion is integrally formed on the lid body, the pressing member can be prevented from coming off the outside of the lid body. Further, in the pressure regulating valve, the through hole may be abutting against the contact piece formed on the pressing member as the front side and the other end, and the second abutting portion for which the spring is extended by a predetermined amount or more is restricted. According to the pressure regulating valve of the present invention, since the abutting piece abuts against the second abutting portion and the second abutting piece, the expansion and contraction stroke of the spring is restricted, so that the pressure adjustment range of the pressure regulating valve can be restricted within a predetermined range. Further, in the pressure regulating valve, the pressing member may have a convex portion that is disposed on the inner circumference of the spring of 5, 2009, 312, and that restricts lateral deviation of the spring. According to the pressure regulating valve of the present invention, since the pressing member has the arrangement and the inner circumference of the spring, the convex portion that restricts the lateral deviation of the spring is restrained, and the spring is stably expanded and contracted, and the upper limit pressure can be stably maintained and °吏5 Adjustment. PRESSURE EFFECT OF THE INVENTION According to the pressure regulating valve of the present invention, the pressing member can be prevented from being detached to the outside of the cover body, and the fluid pressure can be surely limited to a predetermined upper limit pressure. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a longitudinal sectional view showing a pressure reducing valve according to an embodiment of the present invention. Fig. 2 is a view showing the outline of a lid body and a pressing member of a pressure reducing valve according to an embodiment of the present invention. Figure 3 shows the ΙΠ-ΠΙ section of Figure 2. Fig. 4 is a side view showing the outline of a pressing member according to an embodiment of the present invention. Fig. 5A is a longitudinal cross-sectional view showing a state in which the pressure reducing valve according to the embodiment of the present invention is in a state in which the pressing member does not abut against the abutting portion. 2B is a longitudinal cross-sectional view showing a state in which the pressure reducing valve according to the embodiment of the present invention is in contact with the abutting portion. [Poor cooling type] The best mode for carrying out the invention Hereinafter, the pressure reducing valve 1 will be described with reference to Figs. 1 to 5B. Fig. 1 is a view showing a pressure regulating valve according to an embodiment of the present invention. The reference numeral 200931217 1 is a pressure reducing valve (pressure regulating valve) whose pressure of acetylene gas is reduced to an upper limit pressure of 0.15 MPa. 5 ❹ 10 15 ❹ 20 As shown in Fig. 1, the pressure reducing valve 1 includes a casing 1 , a lid 202 , a pressure adjusting mechanism 30 , and a handle 4 , and the pressure adjusting mechanism 30 has valve bodies 31 and 32 and an adjusting spring. (spring) 33 'tray 34, pressing member 39, adjusting screw 36, lever 37. The casing 10 is coupled to the opening 20A side of the lid body 202, and a diaphragm 32 is disposed between the casing 1A and the lid 202. The casing 10 is made of a metal such as brass, and forms an inflow side flow path 12 into which the primary side fluid flows in, an outflow side flow path 4 in which the secondary side fluid flows out, and a communication between the inflow side flow path 12 and the outflow side flow path 14. The flow path 16 and the concave portion 17 communicate with the outflow side flow path 14 via the guide hole 14C. The inflow-side flow path 12 has a first inflow-side flow path 12A that is open to the outside of the casing 10, and a first inflow-side flow path 12A and a communication flow path 16 are connected to each other. The second inflow side flow path 12B. The outflow side flow path 14 has a first outflow side flow path 14A in which one end is opened to the outside of the casing 10, and the second outflow side flow path 14A and the communication flow path 16 are connected to each other. The side flow path 14B flows out. The communication flow path 16 is disposed coaxially with the axis 01 of the adjustment spring 33, and has a large diameter hole 16A and a small diameter hole 66 having a circular cross section, and is connected to the large diameter hole 16A of the large diameter hole 16A and the small diameter hole 16B. The bottom portion is formed with an annular convex portion projecting from the peripheral edge portion of the small-diameter hole 16B to the large-diameter hole 16A side, and the annular convex portion serves as a valve seat 16C that is opened and closed by the valve body 3j. The valve body 31 and the pressing spring 7 200931217 19 are sequentially housed in the large diameter hole 16A from the valve seat 16c, and the valve body 31 is freely movable in the direction of the axis 01, and is pressed against the valve seat 16C side by pressing the elastic body, and the valve body 31 can be used. The small-diameter hole 16B is formed to connect the large-diameter hole 16A with the recessed portion 17, and the small-diameter hole 16B accommodates the rod 37 in a state of being movable in the direction of the axis 01, and constitutes the 5-way inflow-side flow path 12 A portion of the flow path with the outflow side flow path 14. The concave portion 17 is open on the side of the cover body 202, covered by the diaphragm 32, and the pressure of the secondary side fluid flowing into the concave portion 17 through the guide hole MC is applied to the diaphragm 32. In the second and third figures, the cover member 202 is formed by the first member recessed portion 21B and the spring-receiving portion 28B, and the first wall portion of the pressing member member 24B is formed in a pair ( 2) a through hole 2〇2A having a width %丨 extending symmetrically with respect to the axis 〇丨 in the direction of the axis οι, forming a second abutting portion 25β on the wall surface of the opening 20A side (the other end side) of the through hole 202A The wall surface of the through hole 202A opposite to the side (one end side) of the abutting portion 25b in the direction of the axis 〇1 is 2 abutting portion 25C. 15 One end side of the lid body 202 is an opening portion 20A, and the other end side is formed with a wall portion 20B', and the bottom portion is closed and has a plurality of cylindrical portions. The inner peripheral side has a first concave portion that accommodates the adjustment shaft 33. 21. The second recess 22 having a larger diameter than the first recess 21 is located on the opening 2A side of the first recess 21, and a screw for coupling to the housing 10 is formed on the opening 20A side of the second recess 22. The wall portion 20B is integrally formed as a part of the lid body 202 by casting or machining, and a female thread 26 coaxial with the axis 〇1 of the adjustment spring 33 is formed at the center portion, and the adjusting screw 36 is screwed to the female thread 26. The female thread 26 is machined by the wall portion 20B and integrated with the cover body 202. 200931217 In addition, the female thread can also be configured to insert the wall portion 2 and the member that is threaded and separated from the wall portion 20Β or The wall portion 20 is placed in a state where it does not fall off. At this time, the hole for arranging the member in which the female screw 26 is formed is formed as 5 Ο 10 15 ❹. When the member is detached, the pressing member 39 does not pass from the cover 202. Divided to the size and shape of the outer part. The diaphragm 32 is a rounded flat with elasticity The metal plate is expandable in a direction perpendicular to the flat surface, and a rod 37 for coupling or interlocking with the valve body 31 is coupled to the center portion, and the outer peripheral portion is sandwiched between the casing 1 and the cover 2〇2. The diaphragm 32 is disposed to cover the opening of the recess 17 of the housing 10. The diaphragm 32 is expanded in the axial direction by the pressure in the recess 17 communicating with the outlet side flow path 14. The adjustment spring 33 is expandable and contractible in the direction of the axis ,. Further, it is housed in the spring housing portion 28, and the one end side is supported by the diaphragm 32 by the tray 34, and the other end side is supported by the adjusting screw 36 by the pressing member 39. Further, the adjustment spring 33 is elongated by the secondary fluid pressure reduction, the diaphragm 32 is expanded on the side of the concave portion 17, and is compressed by increasing the pressure of the secondary fluid, and the deformation of the diaphragm 32 is performed by the joint structure Α32Α, the rod 37. , transmitted to the valve body η. As a result, the valve body 31 moves in conjunction with the deformation of the diaphragm 32, and the valve seat 16C is opened and closed. The tray 34 has a circular shape in plan view, and has a wall portion in which the peripheral portion is gently raised. The wall portion 34 is disposed on the side of the adjusting spring 33 of the diaphragm 32, and receives the end side of the adjusting spring so as to be disposed on the opposite side of the tray 34 via the diaphragm 32. A 32-inch screw is attached to the diaphragm 32. As shown in Fig. 4, the pressing member 39 has a disk shape having a small-diameter convex portion 35 of eight 2009 20 200931217, and an approximate conical shape of the supporting convex portion 36A for supporting the adjusting screw 36 is formed on the end surface on the opposite side of the small-diameter convex portion 35A. In the recessed portion 35B, the inner circumference of the other end side of the adjustment spring 33 can be disposed on the outer circumference of the small-diameter convex portion 35A. Further, at the position where the center of the pressing member 39 is symmetrical, a pair of abutting pieces 39A and 39B extending in a width W2 outside the radial direction are formed. The abutted piece 39A and the abutted piece 39B may have different shapes, and in this embodiment, they have the same shape. Further, the contact springs 39A and 39B of the pressing member 39 abut against the first abutting portion 25B formed in the through hole 202A, and the adjustment spring 33 can be restricted from being compressed by a predetermined amount or more. Further, the pressing member housing portion 24B is formed to be able to change the posture in which the pressing member 39 can press the adjustment spring 38 in the direction of the axis 〇1, that is, the axis of the pressing member 39 can be changed in the direction of the axis 01. For example, the maximum diameter DA of the pressing member 39, the thickness LA of the maximum diameter DA portion 15, the length LC of each outer circumference (the largest size portion) of the abutting pieces 39A, 39B, the width W2, and the cover 202 The minimum diameter of the inner peripheral wall (corresponding to the inner diameter of the spring accommodating portion 28B) D21 (D1) and the width W of the through hole 202A are DA < D21 < LC, W2 < W1.
又，長度LC與貫穿孔202A之軸線ΟΙ方向之長度之關係 20 没定成使按壓構件39如第2圖所示傾斜，***至第1凹部21B 時’其中一被抵接片39A***至一貫穿孔202A，抵接第2抵 接部25C時，另一被抵接片39B可通過另一貫穿孔202A之第 1抵接部25B之内周側最小徑部份。 又，按壓構件39之不包含被抵接片39A、39B之圓板狀 200931217 之部份的最大徑為DA’最大控DA部份之厚度為la，小徑 凸部35A之外徑為DB，小徑凸部35A之厚度為lb。 5 Ο 10 15 ❹ 20 結果’按壓構件39可從開口部20 A側收納於按壓構件收 納部24B，並且以按壓調整彈簧33之姿勢，將被抵接片 39A、39B***貫穿孔202A，防止從按壓構件收納部24B脫 落，進一步，藉調整螺絲36，於壓縮調整彈簧33之方向移 動時，藉與第1抵接部25B抵接，可限制壓縮調整彈簧33預 定量以上。 調整螺絲3 6具有在前端前端侧縮徑之略呈圓錐形之支 撐凸部36A ’螺合於陰螺紋26，可於調整彈簧33之轴線〇1 方向進退，同時，支撐凸部36A抵接按壓構件39之凹部35 B ’支撐調整彈簧33。 才干37之一端與閥體31抵接，同時，另一端與隔膜32之 連結部32A抵接，而可將隔膜32中央部膨脹變形之變位傳達 至閥體31。 此外，在此實施形態中，桿37為與連結構件32A及閥體 31抵接，將隔膜32之變形之變位傳達至閥體31之結構，亦 可為與連結構件32A及閥體31兩者或任一者連結之結構。 手柄40於呈有底之圓筒狀之外周長向形成凹部 ，於底 邛中央部之圓筒形狀内側埋設與軸線01同軸之調整螺絲 36，此調整螺絲36螺合於陰螺紋26，藉旋動手柄4〇，調整 螺絲36相對於陰螺紋26進退。 接著，就減壓閥1之作用作說明。 減壓閥1當施加於隔膜32之壓力降低時，以調整彈簧33 11 200931217 之按壓力，使閥體31離開閥座16C，開放閥座16(：，流體從 流入側流路12流至流出側流路14。 又，當施加於隔膜32之力高於預定壓力時，壓縮調整 彈簧33，並且以按壓彈簧19之按壓力，閥體31抵接閥座 5 16C，封閉閥座16C，停止流體從流入側12至流出側流路14 之流動。 減壓閥1之壓力調整係旋動手柄4〇來進行，旋動手柄 40 ’使調整螺絲36旋動而進退時，支撐凸部36A藉由按壓構 件39，使調整彈簧33於軸線〇1方向伸縮。 10 支撐凸部36A前進，壓縮調整彈簧33時，施加於隔膜32 之按壓力增大，2次側流體之調整壓力增高。 當2次側流體之壓力在調整範圍時，如第5A圖所示，按 壓構件39之被抵接片39A、39B不抵接第1抵接部25B，調整 螺絲36可進退。 15 此外’在此實施形態中，旋動手柄40，鬆開調整螺絲 36，調整螺絲36之支撐凸部36A從按壓構件39之凹部35B脫 離時’按壓構件39之被抵接片39A、39B與第2抵接部25C抵 接，按壓構件39可抑制調整彈簧伸長至預定長度以上。 結果’藉旋動手柄40，可將減壓閥1之2次側流體之壓 2〇 力調整至預定範圍内。 接著，以手柄40，使調整螺絲36旋動，而使支樓凸部 36A前進時，如第5B圖所示，按壓構件39之被抵接片39A、 39B抵接第1抵接部25B，調整螺絲36無法前進。 結果，手柄40無法旋動，且，按壓構件39無法壓縮調 12 200931217 整彈簧33，對隔膜32之按壓力增加之按壓構件39抵接第 接部25B時之2次側流體壓力為2次侧流體之上限壓力，可防 止2次側流體之壓力高過此。 5 ❹ 10 15 Ο 20 又，由於按壓構件39無法從蓋體202脫離，故即使調整 螺絲36過度鬆開或調整螺絲36脫離，亦可防止無法按壓隔 膜32造成之無法調整2次側流體之壓力。 由於於按壓構件39形成小徑凸部35A，小徑凸部35A配 置於調整彈簧33之内周’故可抑制調整彈簧33之另一端侧 與按壓構件39於與軸線01垂直相交之方向相對地大幅位 移’而可使調整彈簧33穩定地伸縮。結果，可穩定地調整2 次側流體之壓力。 又，習知，為調整調整彈簧33之長度，而使調整螺絲 36旋轉時，以摩擦將調整螺絲36之旋轉藉由按壓構件39， 傳達至調整彈簧33，於調整彈簧33產生軸線01周圍之扭轉 或因扭轉造成之經時變化，有調整彈簧33之壓縮力變化之 可能性，或者，有隔膜32因扭轉而破損之可能性。 因此，習知，為抑制調整螺絲36之旋轉傳達至按壓構 件39，一般係將調整螺絲36之前端形成尖銳或球面狀，而 細小與按壓構件39之接觸面積，或者藉由球體等旋轉體接 觸，而在減壓閥等壓力調整閥中，因被抵接片39A、39B插 入至貫穿孔202A，調整螺絲36之旋轉無法傳達至調整彈簧 33 ’故不需上述習知之結構。 根據蓋體202，以切削等機械加工形成構成第丨抵接部 25B之貫穿孔202A時，可易加工。 13 200931217 又，可易確認被抵接片39A、39B之抵接狀態。 此外’在上述實施形態中，說明了第1凹部21B形成圓 筒形狀之情形’亦可構造成於第1凹部21B之内周形成延伸 至徑方向内側之肋，於此肋之前端部内側形成彈簧收納 5 部，並且使按壓構件39之最大徑DA小於彈簧收納部之内 徑。 此時，被抵接片39A、39B可通過相鄰之肋間，而可更 容易且有效率地進行按壓構件39在按壓構件收納部24B之 收納。 ® 10 此外’本發明非以上述實施形態限定者，在不脫離發 明之旨趣之範圍，可進行各種變更。 在上述實施形態中，說明了壓力調整閥為減壓閥1之情 形’亦可應用於背壓閥來取代減壓閥1。 又，在上述實施形態中，說明了形成於蓋體202之貫穿 15 孔202A之軸線01方向之一端側作為第1抵接部25B，另一端 側作為第2抵接部25C之情形，亦可為另一端側之壁面不作 為第2抵接部25C之結構。 © 又’在上述實施形態中，說明了閥體31配置於使流入 側流路12與流出側流路14連通之連通流路16，開關閥座16 C 2〇 之結構，亦可對以隔膜32使閥體移動，開關閥座之各種壓 力調整閥適用是無須贅言的。 又，在上述實施形態中，說明了按壓構件收納部24B、 彈簧收納部28B、按壓構件39從軸線〇1方向觀看平面為圓 形之情形’平面觀看之形狀亦可為多角形等其他形狀。 14 200931217 又’在上述實施形態中，說明了減壓閥1處理之氣體為 乙炔氣體之情形，處理之氣體除了可為以氮、氬等惰性氣 體、氫、曱烷、乙烯等可燃性氣體、氧等助燃性氣體、氣、 二氧化硫等腐钱性氣體為代表之氣體外，亦可以含有水、 5 酸或鹼之液體等各種流體為對象。 關於隔膜32，說明了以金屬製圓板構成之情形，材質 除了以不鏽鋼為代表之金屬外，亦可使用橡膠膜或合成樹 脂等具有彈力性之其他材質，再者，關於形狀，不限於圓 鬱 板形平板’亦可以閥體31為中心，於隔膜32形成環狀肋或 10 使用球面等立體形狀之一部份，構成隔膜32。 產業上之可利用性 本發明係有關於一種壓力調整閥，此壓力調整閥包含 有蓋體、殼體、隔膜、閥體、彈簧、按壓構件、調整螺絲， 該蓋體係一端側作為開口部，並且於另一端側設置壁部， 15 於該壁部形成陰螺紋者；該殼體係配置於前述蓋體之開口 部側，具有流入側流路、流出側流路、形成於前述流入侧 〇 流路與前述流出側流路間之閥座者；該隔膜係配置於前述 蓋體與前述殼體間，可藉前述流入侧流路側或前述流出側 流路側之流體壓力來變形者；該閥體係與前述隔膜之變形 20 連動而移動，開關前述閥座者；該彈簧係配置於前述蓋體 内，軸線方向之一端侧按壓前述隔膜者；該按壓構件係配 置於前述彈簧之前述轴線方向之另一端侧者；該調整螺絲 係可於前述陰螺紋螺合而進退，藉由前述按壓構件，調敕 前述彈簧之按壓力者；前述蓋體與前述壁部形成—體Ί 15 200931217 且於周壁部形成於前述彈簧之伸縮方向延伸，貫穿前述蓋 體内部與外部之貫穿孔，前述貫穿孔係作為前述一端側與 形成於前述按壓構件之被板接片抵接，而限制前述彈菁壓 縮預定量以上之第1抵接部。 5 10 根據本發明’可防止按壓構件脫離至蓋體之外部，並 且可確實地將流體之壓力限制在預定之上限壓力以下。 【圖式簡單說明3 第1圖係顯示本發明一實施形態之減壓閥之縱截面圖。 第2圖係顯示本發明一實施形態之減壓閱之蓋體及按 壓構件之概略者。Further, the relationship 20 between the length LC and the length of the through hole 202A in the axial direction is not determined so that the pressing member 39 is inclined as shown in Fig. 2, and when inserted into the first recess 21B, one of the abutment pieces 39A is inserted into the line. When the perforation 202A abuts against the second abutting portion 25C, the other abutting piece 39B can pass through the inner peripheral side minimum diameter portion of the first abutting portion 25B of the other through hole 202A. Further, the maximum diameter of the portion of the pressing member 39 which does not include the disk-shaped 200931217 of the abutting pieces 39A, 39B is DA', the thickness of the maximum control DA portion is la, and the outer diameter of the small-diameter convex portion 35A is DB. The small diameter convex portion 35A has a thickness of lb. 5 Ο 10 15 ❹ 20 As a result, the pressing member 39 can be accommodated in the pressing member accommodating portion 24B from the opening portion 20A side, and the abutting pieces 39A and 39B can be inserted into the through hole 202A in a posture in which the adjusting spring 33 is pressed to prevent the pressing member from being inserted into the through hole 202A. The pressing member accommodating portion 24B is detached, and when the adjusting screw 36 is moved in the direction of the compression adjusting spring 33, the first adjusting portion 25B is brought into contact with each other, and the compression adjusting spring 33 can be restricted by a predetermined amount or more. The adjusting screw 36 has a substantially conical support convex portion 36A' which is reduced in diameter at the front end side, and is screwed to the female screw 26 to advance and retreat in the direction of the axis 〇1 of the adjusting spring 33, and at the same time, the supporting convex portion 36A abuts The recess 35 B ' of the pressing member 39 supports the adjustment spring 33. One end of the stem 37 abuts against the valve body 31, and the other end abuts against the joint portion 32A of the diaphragm 32, and the displacement of the central portion of the diaphragm 32 is transmitted to the valve body 31. Further, in this embodiment, the rod 37 is in contact with the connecting member 32A and the valve body 31, and the displacement of the deformation of the diaphragm 32 is transmitted to the valve body 31, and may be combined with the connecting member 32A and the valve body 31. The structure of either or both. The handle 40 is formed into a concave portion in a cylindrical shape having a bottomed shape, and an adjusting screw 36 coaxial with the axis 01 is embedded inside the cylindrical shape of the central portion of the bottom portion, and the adjusting screw 36 is screwed to the female thread 26 With the movable handle 4〇, the adjusting screw 36 advances and retreats relative to the female thread 26. Next, the action of the pressure reducing valve 1 will be described. When the pressure applied to the diaphragm 32 is lowered, the pressure reducing valve 1 adjusts the pressing force of the spring 33 11 200931217 to move the valve body 31 away from the valve seat 16C, and opens the valve seat 16 (:, the fluid flows from the inflow side flow path 12 to the outflow The side flow path 14. Further, when the force applied to the diaphragm 32 is higher than the predetermined pressure, the adjustment spring 33 is compressed, and with the pressing force of the pressing spring 19, the valve body 31 abuts against the valve seat 5 16C, closes the valve seat 16C, and stops. The flow of fluid from the inflow side 12 to the outflow side flow path 14. The pressure adjustment of the pressure reducing valve 1 is performed by rotating the handle 4〇, and when the handle 40' is rotated to advance and retract the adjusting screw 36, the supporting convex portion 36A The adjusting member 33 expands and contracts in the direction of the axis 〇1 by the pressing member 39. When the supporting convex portion 36A advances, when the adjusting spring 33 is compressed, the pressing force applied to the diaphragm 32 increases, and the adjustment pressure of the secondary side fluid increases. When the pressure of the secondary fluid is within the adjustment range, as shown in Fig. 5A, the abutting pieces 39A and 39B of the pressing member 39 do not abut against the first abutting portion 25B, and the adjusting screw 36 can advance and retreat. 15 Further 'implemented here In the form, rotate the handle 40, loosen the adjusting screw 36, and adjust When the support convex portion 36A of the wire 36 is detached from the concave portion 35B of the pressing member 39, the contacted pieces 39A and 39B of the pressing member 39 abut against the second abutting portion 25C, and the pressing member 39 can suppress the adjustment spring from being extended to a predetermined length or longer. [Results] By rotating the handle 40, the pressure of the secondary side of the pressure reducing valve 1 can be adjusted to within a predetermined range. Next, with the handle 40, the adjusting screw 36 is rotated to make the branch convex portion When the 36A is advanced, as shown in FIG. 5B, the abutting pieces 39A and 39B of the pressing member 39 abut against the first abutting portion 25B, and the adjusting screw 36 cannot advance. As a result, the handle 40 cannot be rotated, and the pressing member 39 is pressed. It is impossible to compress the adjustment spring 12 200931217 the entire spring 33, and the secondary fluid pressure when the pressing member 39 which increases the pressing force of the diaphragm 32 abuts against the first connecting portion 25B is the upper limit pressure of the secondary fluid, thereby preventing the pressure of the secondary fluid. 5 ❹ 10 15 Ο 20 Further, since the pressing member 39 cannot be detached from the lid body 202, even if the adjusting screw 36 is excessively loosened or the adjusting screw 36 is detached, it is possible to prevent the diaphragm 32 from being pressed and unable to adjust twice. The pressure of the side fluid. Due to the pressing member 39 The small-diameter convex portion 35A is formed, and the small-diameter convex portion 35A is disposed on the inner circumference of the adjustment spring 33. Therefore, it is possible to suppress the other end side of the adjustment spring 33 from being relatively displaced in the direction perpendicular to the perpendicular direction of the pressing member 39. The adjustment spring 33 is stably expanded and contracted. As a result, the pressure of the secondary fluid can be stably adjusted. Further, in order to adjust the length of the adjustment spring 33, when the adjustment screw 36 is rotated, the rotation of the adjustment screw 36 is rubbed by friction. The pressing member 39 is transmitted to the adjusting spring 33, and the adjusting spring 33 generates a twist around the axis 01 or a temporal change due to the twist, and there is a possibility that the compressive force of the adjusting spring 33 changes, or the diaphragm 32 is twisted. And the possibility of damage. Therefore, conventionally, in order to suppress the rotation of the adjusting screw 36 from being transmitted to the pressing member 39, the front end of the adjusting screw 36 is generally formed into a sharp or spherical shape, and the contact area with the pressing member 39 is small, or is contacted by a rotating body such as a ball. In the pressure regulating valve such as the pressure reducing valve, since the abutting pieces 39A and 39B are inserted into the through hole 202A, the rotation of the adjusting screw 36 cannot be transmitted to the adjusting spring 33', so that the above-described conventional structure is not required. According to the lid body 202, when the through hole 202A constituting the second abutting portion 25B is formed by machining such as cutting, the processing can be easily performed. 13 200931217 Moreover, the abutment state of the contacted pieces 39A and 39B can be easily confirmed. In addition, in the above-described embodiment, the case where the first recessed portion 21B is formed into a cylindrical shape is described, and the inner peripheral portion of the first recessed portion 21B may be formed so as to extend to the inner side in the radial direction, and the inner side of the front end portion of the rib is formed. The spring accommodates 5 portions, and the maximum diameter DA of the pressing member 39 is made smaller than the inner diameter of the spring housing portion. At this time, the contacted pieces 39A and 39B can pass the adjacent ribs, and the pressing member 39 can be accommodated in the pressing member accommodating portion 24B more easily and efficiently. In addition, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. In the above embodiment, the case where the pressure regulating valve is the pressure reducing valve 1 has been described, and it is also applicable to the pressure reducing valve 1 instead of the back pressure valve. Further, in the above-described embodiment, the one end side in the direction of the axis 01 of the through hole 202A of the lid body 202 is defined as the first abutting portion 25B, and the other end side is the second abutting portion 25C. The wall surface on the other end side is not configured as the second abutting portion 25C. In the above-described embodiment, the valve body 31 is disposed in the communication passage 16 that connects the inflow-side flow path 12 and the outflow-side flow path 14, and the switch valve seat 16 C 2 is configured to be a diaphragm. 32 The valve body is moved, and it is not necessary to use various pressure regulating valves for the valve seat. In the above-described embodiment, the pressing member housing portion 24B, the spring housing portion 28B, and the pressing member 39 have a circular shape when viewed from the direction of the axis 〇1. The shape viewed in plan view may be other shapes such as a polygonal shape. 14 200931217 Further, in the above embodiment, the gas treated by the pressure reducing valve 1 is acetylene gas, and the gas to be treated may be an inert gas such as nitrogen or argon, or a combustible gas such as hydrogen, decane or ethylene. In addition to a gas represented by a corrosive gas such as oxygen, such as a combustion-supporting gas, gas, or sulfur dioxide, various fluids such as water, a liquid such as an acid or a base may be used. In the case of the diaphragm 32, a metal disc is used. In addition to the metal represented by stainless steel, other materials having elasticity such as a rubber film or a synthetic resin may be used. Further, the shape is not limited to a circle. The slab-shaped plate may also be centered on the valve body 31, form an annular rib on the diaphragm 32, or form a diaphragm 32 using one of three-dimensional shapes such as a spherical surface. INDUSTRIAL APPLICABILITY The present invention relates to a pressure regulating valve including a cover body, a housing, a diaphragm, a valve body, a spring, a pressing member, and an adjusting screw, the one end side of which is an opening portion, and a wall portion is provided on the other end side, and a female thread is formed on the wall portion. The casing is disposed on the opening side of the lid body, and has an inflow side flow path, an outflow side flow path, and an inflow side turbulent flow path. a valve seat between the outflow side flow path; the diaphragm is disposed between the cover body and the casing, and is deformable by fluid pressure on the inflow side flow path side or the outflow side flow path side; the valve system is The deformation of the diaphragm 20 moves in conjunction with the valve seat, and the spring is disposed in the cover body, and the one end of the axial direction presses the diaphragm; the pressing member is disposed in the axial direction of the spring. One end side; the adjusting screw can be advanced and retracted by screwing the female screw, and the pressing force of the spring is adjusted by the pressing member; the cover body and the wall Forming the body Ί 15 200931217 and forming a peripheral wall portion extending in the expansion and contraction direction of the spring, and penetrating through the through hole in the inside and the outside of the cover body, the through hole being formed as the one end side and the plated piece formed on the pressing member Then, the first abutting portion that is compressed by the predetermined amount or more is restricted. According to the present invention, the pressing member can be prevented from being detached to the outside of the lid body, and the pressure of the fluid can be surely limited to be less than a predetermined upper limit pressure. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a longitudinal sectional view showing a pressure reducing valve according to an embodiment of the present invention. Fig. 2 is a view showing the outline of a pressure-reducing cover body and a pressing member according to an embodiment of the present invention.
第3圖係顯示第2圖之III-III截面者。 第4圖係顯示本發明一實施形態之按壓構件概略之側 面圖。 15 第5A圖係顯示本發明一實施形態之減壓閥之作用者， 顯示按壓構件未抵接抵接部之狀態之縱截面圖。 第5B圖係顯示本發明一實施形態之減壓閥之作用者， 顯示按壓構件抵接抵接部之狀態之縱截面圖。Fig. 3 is a view showing a section III-III of Fig. 2. Fig. 4 is a side view showing the outline of a pressing member according to an embodiment of the present invention. 15A is a longitudinal cross-sectional view showing a state in which the pressure reducing valve of the embodiment of the present invention is in a state in which the pressing member is not in contact with the abutting portion. Fig. 5B is a longitudinal cross-sectional view showing a state in which the pressure reducing valve of the embodiment of the present invention is in contact with the abutting portion.
【主要元件符號說明】 1.. .減壓閥 10.. .殼體 12.. .流入側流路 14A…第1流出側流路 14B…第2流出側流路 14C...導孔 12A...第1流入側流路 16...連通流路 12B...第2流入側流路 16A...大徑孔 14...流出側流路 16 200931217 16C...閥座 35B...凹部 ' 17...凹部 36...調整螺絲 19...按壓彈簧 36A...支撐凸部 20A...開口部 37...桿 20B...側部 39...按壓構件 21··.第1凹部 39A...被抵接片 21B...第1凹部 39B...被抵接片 22…第2凹部 40...手柄 Ο 24B...按壓構件收納部 202...蓋體 25B...第1抵接部 202A...貫穿孔 25C...第2抵接部 01...轴線 26...陰螺紋 W1…寬度 - 28B...彈簧收納部 W2...寬度 30...壓力調整機構 DA...按壓構件39之最大徑 31...閥體 LA...最大徑DA部份之厚度 32...隔膜 LC...連結被抵接片39A、39B ❹ 32A...連結構件 之各外周之長度 33...調整彈簧 D21 (D1)…蓋體202之内周壁 34...托盤 35A...小徑凸部 之最小徑 17[Description of main component symbols] 1.. Pressure reducing valve 10.. Housing 12.. Inflow side flow path 14A... First outflow side flow path 14B... Second outflow side flow path 14C... Guide hole 12A ...first inflow side flow path 16...communication flow path 12B...second inflow side flow path 16A...large diameter hole 14...outflow side flow path 16 200931217 16C...valve 35B ...recessed portion 17...recessed portion 36...adjustment screw 19...pressing spring 36A...supporting convex portion 20A...opening portion 37...rod 20B...side portion 39... The pressing member 21··. the first recess 39A...the contact piece 21B...the first recess 39B...the contact piece 22...the second recess 40...the handle Ο 24B...the pressing member accommodation Portion 202...lid body 25B...first abutting portion 202A...through hole 25C...second abutting portion 01...axis 26...female thread W1...width - 28B.. Spring storage portion W2...width 30...pressure adjustment mechanism DA...maximum diameter 31 of pressing member 39...valve body LA...maximum diameter DA portion thickness 32... diaphragm LC. .. connection of the abutting pieces 39A, 39B ❹ 32A... the length 33 of each outer circumference of the connecting member... adjusting spring D21 (D1)... inner peripheral wall 34 of the cover 202... tray 35A... small diameter Minimum diameter of the convex part 17