M409337 五、新型說明： 【新型所屬之技術領域】 本創作關於一種閥的止漏裝置，尤指一種適於安 裝在閩上用以防止管路輸送流體洩漏的止漏裝置。 【先前技術】 在一般輸送流體的管道中，廣泛使用閥來控制管 路的流通或關閉。當閥的組件受管道内的流體腐蝕或 是本身老化失效後，輸送流體將會外洩而造成損失， 且需要停機以進行閥的維修。 參閱第一圖，顯示一種習用閥10,其包含一閥體 12，閥體12具有進流口 14及出流口 16用以個別提 供管路（未圖示）連接，閥體12頂部具有一轴孔18。 一閥桿20的下端22伸入軸孔18内且連接一止流塞 24，閥桿20的上端26連接手輪28。當操作手輪28 轉動時，閥桿20與止流塞24會隨著上下移動而關閉 或是開放閥體12内部的流體通道。再者，閥體12頂 部安裝一防洩漏裝置30，防洩漏裝置30包含結合在 閥體12頂面的外蓋31、位在外蓋31上方的壓塊32 及容納在外蓋31内的封墊34,封墊34的上、下端個 別安裝一軸襯35、36，當螺絲38鎖緊加壓後，封墊 34會將閥桿20與外蓋31之間的通道密合，藉以阻止 輸送流體經由閥體12的軸孔18外洩。 3 M409337 第二圖顯示另一種習用的閥40，閥40包含閥體 12、閥桿20、手輪28、及防洩漏裝置30。該閥40 與第一圖之閥1〇的差異在於當操作手輪28轉動時， 第二圖中的閥桿20會一起轉動而上下移動，再者， 閥桿20的下端22安裝一螺帽42，螺帽42的外螺紋 44與止流塞24的内螺紋46螺合使得止流塞24會隨 著閥桿20上下位移但不會隨著轉動。防洩漏裝置3〇 同樣包含外蓋31、壓塊32、封墊34及軸襯35、36， 當壓塊32上的螺絲38鎖緊之後，封墊34會將閥桿 20與外蓋31之間的空間密合以提供防洩漏的作用。 然而’習用的閥1 〇、40在使用一段時間之後，防 洩漏裝置30的封墊34會磨損或破裂，導致防洩漏裝 置30的防洩漏效果降低。此外，當閥桿2〇向上移動 到開放閥體12之流體通道的位置時，閥桿2〇與下軸 襯36之間並無可密接，造成輸送流體也會經由閥桿 20與下轴襯36之間的隙縫外浪。 【新型内容】 本創作人有鑑於此，遂悉心加以研究分析及設 計’於今有本創作之產生。是以，本創作之主要目的 在提供一種閥的止漏裝置’其可組合在閥上用以提供 可靠與耐久的止漏效果，同時可強化閥桿與軸襯之間 的止漏性。 4 M409337 依據本創作構成之止漏裝置係用來安裝在一閥 體上；該止漏裝置包含一外殼及一閥桿，該外殼包含 在一垂直方向分隔的底端與頂端，該外殼的底端結合 在該閥體的上端’該外殼更包含由該外殼頂端延伸穿 過該外殼底端的縱向孔，該外殼之頂端内具有一凹 部❶該閥桿包含在該垂直方向分隔的上端與下端，該 閥桿的下端穿過該外殼的縱向孔且該閥桿可在該外 殼的縱向孔内相對該閥體做上下移動，該閥桿更包含 位在該下端與上端之間的一中間段，該中間段設有一 與該外殼之凹部相配合的凸部；當該閥桿向上移動至 一位置時，該閥桿中間段的凸部會與該外殼之頂端内 的凹部密接而形成止漏。 在一實施例中，該止漏裝置更包含一伸縮套，該 伸縮套容納在該外殼的縱向孔内且包含一轴孔，該闕 矛干的下端延伸穿過該伸縮套的軸孔，該伸縮套更包含 在該垂直方向分隔的上端與下端，該伸縮套的上端連 接在該外殼之頂端，該伸縮套的下端連接在該閥桿上 使得該伸縮套的下端會與該闊桿一起位移。 在一較佳實施例中，該外殼的頂端包含一外蓋， 該外蓋内部具有一軸襯，該軸襯具有一穿孔，該軸襯 之穿孔下端係擴大而形成該凹部，該閥桿穿過該外蓋 及該軸襯的穿孔。該中間段的凸部為環狀，該凸部具 5 M409337 有一弧狀頂端’當該閥桿向上移動至該位置時，該闕 桿中間段的凸部的頂端與該軸襯之凹部形成密接。 關於本創作之其他目的、優點及特徵，將可由以 下較佳實施例的詳細說明並參照所附圖式來了解。 【實施方式】 現將僅為例子但非用以限制的具體實施例，並參 照所附圖式就本創作之較佳結構内容說明如下： 參閱第三圖至第七圖，顯示依據本創作第一實施 例構成的止漏裝置48，該止漏裝置48係要用來結合 在一閥50上用以提供止漏作用。閥5〇包含一閥體 52 ’閥體52具有一進流口 54及一出流口 56用以個 別提供管路（未圖示）連接。閥體52的上端57具有 一轴孔58。該止漏裝置48包含一閥桿60，閥桿60 包含在一垂直方向分隔的下端62與上端⑽，下端62 伸入軸孔58内且連接一止流塞64，閥桿6〇的上端 66具有螺紋且連接一手輪68。當操作手輪68轉動 時，閥桿60與止流塞64會隨著上下移動而關閉或是 開放閥體52内部的流體通道（見第六圖與第七圖）。 閥桿60更包含位在下端62與上端66之間的一中間 段63，中間段63設有一環狀的凸部65 ,該凸部65 具有一弧狀的頂端67。再者，該閥5〇的上方有一防 洩漏裝置70，防洩漏裝置7〇包含一外蓋、位在外 6 M409337 蓋71上方㈣塊72及容納在外蓋71㈣封墊74, 封墊74的下端安裝一具有穿孔77的軸襯76，閥桿 6〇的上端66穿過外蓋71、封塾74、及軸襯76，當 鎖緊螺桿78對_ 72加麗之後，該封墊74會將閥 桿60與外蓋71之間的通道密合。再者，該軸襯％ 的穿孔77下端具有-擴大凹部79，該擴大凹部π 的尺寸與外型設成可與閥桿6G之凸部65的頂端67M409337 V. New description: [New technical field] This is a leak-stop device for a valve, especially a leak-stop device suitable for mounting on a concrete to prevent fluid leakage from the pipeline. [Prior Art] In a pipe for generally conveying a fluid, a valve is widely used to control the circulation or closing of a pipe. When the components of the valve are corroded by fluid in the pipeline or are aging by themselves, the transport fluid will leak out and cause damage, and shutdown is required for valve maintenance. Referring to the first figure, a conventional valve 10 is shown, which includes a valve body 12 having an inlet port 14 and an outlet port 16 for individually providing a connection (not shown). The valve body 12 has a top portion. Shaft hole 18. The lower end 22 of a valve stem 20 extends into the shaft bore 18 and is connected to a stop plug 24, the upper end 26 of which is coupled to the hand wheel 28. When the operating hand wheel 28 is rotated, the valve stem 20 and the stop plug 24 are closed as the up and down movement or the fluid passage inside the valve body 12 is opened. Furthermore, a leakage preventing device 30 is mounted on the top of the valve body 12. The leakage preventing device 30 includes an outer cover 31 coupled to the top surface of the valve body 12, a pressing block 32 positioned above the outer cover 31, and a sealing pad 34 received in the outer cover 31. A bushing 35, 36 is separately mounted on the upper and lower ends of the sealing pad 34. When the screw 38 is locked and pressurized, the sealing pad 34 will close the passage between the valve stem 20 and the outer cover 31, thereby preventing the conveying fluid from passing through the valve. The shaft hole 18 of the body 12 is leaked. 3 M409337 The second figure shows another conventional valve 40 that includes a valve body 12, a valve stem 20, a hand wheel 28, and a leakage prevention device 30. The difference between the valve 40 and the valve 1 of the first figure is that when the operating hand wheel 28 is rotated, the valve stem 20 in the second figure will rotate together to move up and down. Further, the lower end 22 of the valve stem 20 is fitted with a nut. The external thread 44 of the nut 42 is threaded with the internal thread 46 of the stop plug 24 such that the stop plug 24 will move up and down with the valve stem 20 but will not rotate with it. The leakage preventing device 3〇 also includes an outer cover 31, a pressing block 32, a sealing pad 34 and bushings 35, 36. When the screw 38 on the pressing block 32 is locked, the sealing pad 34 will be the valve stem 20 and the outer cover 31. The space between them is tight to provide a leakproof effect. However, after the conventional valves 1 and 40 are used for a while, the gasket 34 of the leakage preventing device 30 may be worn or broken, resulting in a decrease in the leakage preventing effect of the leakage preventing device 30. In addition, when the valve stem 2〇 is moved upward to the position of the fluid passage opening the valve body 12, there is no close connection between the valve stem 2〇 and the lower bushing 36, so that the conveying fluid is also passed through the valve stem 20 and the lower bushing. Outside the gap between the 36 waves. [New content] In view of this, the creator has carefully studied and analyzed the design and design. Therefore, the main purpose of the present invention is to provide a valve leakage preventing device which can be combined on the valve to provide a reliable and durable leak-stopping effect while enhancing the leak-stopping property between the valve stem and the bushing. 4 M409337 The leak stop device according to the present invention is used for mounting on a valve body; the leak stop device comprises a casing and a valve stem, the casing comprises a bottom end and a top end separated in a vertical direction, the bottom of the casing The end is coupled to the upper end of the valve body. The outer casing further includes a longitudinal hole extending from the top end of the outer casing through the bottom end of the outer casing. The outer casing has a recess in the top end of the outer casing. The valve stem includes upper and lower ends separated by the vertical direction. a lower end of the valve stem passes through a longitudinal bore of the outer casing and the valve stem is movable up and down relative to the valve body in a longitudinal bore of the outer casing, the valve stem further comprising an intermediate section between the lower end and the upper end, The intermediate section is provided with a convex portion that cooperates with the concave portion of the outer casing; when the valve stem is moved upward to a position, the convex portion of the middle portion of the valve stem is in close contact with the concave portion in the top end of the outer casing to form a leak stop. In an embodiment, the leakage preventing device further comprises a telescopic sleeve received in the longitudinal hole of the outer casing and including a shaft hole, the lower end of the lancet extending through the shaft hole of the telescopic sleeve, the telescopic sleeve Further included at the upper end and the lower end of the vertical direction, the upper end of the telescopic sleeve is connected to the top end of the outer casing, and the lower end of the telescopic sleeve is connected to the valve stem such that the lower end of the telescopic sleeve is displaced together with the wide rod. In a preferred embodiment, the top end of the outer casing comprises an outer cover, the outer cover has a bushing therein, the bushing has a through hole, and the lower end of the perforation of the bushing is enlarged to form the concave portion, and the valve stem passes through The outer cover and the perforation of the bushing. The convex portion of the middle portion is annular, and the convex portion has a curved end portion 5 M409337. When the valve stem is moved upward to the position, the top end of the convex portion of the middle portion of the mast is in close contact with the concave portion of the bushing. . Other objects, advantages and features of the present invention will be apparent from the description of the preferred embodiments illustrated herein DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be described by way of example only, but not by way of limitation. An embodiment is constructed of a leak stop device 48 that is intended to be coupled to a valve 50 for providing a leak stop function. The valve 5A includes a valve body 52'. The valve body 52 has an inlet port 54 and an outlet port 56 for individually providing a conduit (not shown) for connection. The upper end 57 of the valve body 52 has a shaft hole 58. The leak stop device 48 includes a valve stem 60 that includes a lower end 62 and an upper end (10) that are vertically spaced apart. The lower end 62 extends into the shaft bore 58 and is connected to a stop plug 64. The upper end 66 of the valve stem 6〇 Threaded and connected to a hand wheel 68. When the operating hand wheel 68 is rotated, the valve stem 60 and the stop plug 64 will close or move open with the fluid passage inside the valve body 52 (see Figures 6 and 7). The valve stem 60 further includes an intermediate section 63 between the lower end 62 and the upper end 66. The intermediate section 63 is provided with an annular projection 65 having an arcuate top end 67. Furthermore, there is an anti-leakage device 70 above the valve 5〇. The anti-leakage device 7〇 includes an outer cover, a block 64 above the outer M6337 cover 71, and a cover 72 at the outer cover 71 (four), and the lower end of the gland 74 is installed. A bushing 76 having a perforation 77, the upper end 66 of the valve stem 6〇 passes through the outer cover 71, the closure 74, and the bushing 76. When the locking screw 78 is _72 galvanized, the gland 74 will actuate the valve The passage between the rod 60 and the outer cover 71 is in close contact. Further, the lower end of the perforation 77 of the bushing % has an enlarged recess 79, and the enlarged recess π is sized and shaped to be the top end 67 of the convex portion 65 of the valve stem 6G.
為密接的配合（見第六圖）。在另—實施财，該軸 襯76與該外蓋71形成一體。 在本實施财，止漏裝置48更包含―圓筒狀的外 殼82及容納在外殼82内的一伸縮套（beU〇w) 84。For close fitting (see Figure 6). In another embodiment, the bushing 76 is formed integrally with the outer cover 71. In the present embodiment, the leak stop device 48 further includes a cylindrical outer casing 82 and a telescopic sleeve 84 housed in the outer casing 82.
該外殼82安裝在閥體52的上端57與防洩漏裝置7〇 之外蓋71之間，該外殼82包含在該垂直方向分隔的 底端86與頂端88、及由頂端88延伸穿過底端86的 縱向孔90。該縱向孔90可供閥桿60的下端62延伸 穿過，外殼82的底端86結合在閥體52的上端57且 外设82的頂端88結合在外蓋71底部。在本實施例 中’係利用複數螺栓91將外殼82鎖固在閥體52的 上端57。 該伸縮套84為金屬製的中空套體且包含一轴孔 98 ’伸縮套84更包含在該垂直方向分隔的上端99與 下端100 ’該上端99係密合地連接在該外殼82之頂 7 M409337 端8的縱向孔90内使得該伸縮套84的上端99被定 閥杯60的下端62延伸穿過該伸縮套84的軸孔 98且與該下端1GG連接’使得該伸縮套84的下端100 會與間桿60 一起做上下位移。當閥桿60向下移動 時’該伸縮套84會向下拉伸，另—方面，當闕桿⑽ 向上移動時’伸縮套84會向上收縮。在本實施例中， 伸縮套84包含在該垂直方向分隔的複數金屬片 1〇6’各金屬# 1〇6形成彎折狀且相鄰上、下金屬片 ⑽的外端連接在—起使得伸縮套84的外緣形成鑛 齒狀，當該伸縮套84受壓縮時，相鄰的上、下金屬 片106會相互推疊。 ^ ^操作手輪68轉動時，閥桿60與止流塞64會隨 著上下移動而關閉或是開放閥體52内部的流體通道 (見第六圖及第七圖）；同時，伸縮套84也會隨著 閥桿6〇的上下移動而在外殼82的縱向孔9〇内做伸 縮°由於伸縮套84之上端99結合在外殼们之頂端 88的縱向孔90内且封閉，所以，闕體52内_# 體無法經由外殼82的縱向孔⑽韵，因而，能進一 步補強該閥50的止漏效果。再者’除了閥桿6〇與第 一圖的閥桿20在長度有差異之外，該閥5〇的結構盘 第一圖的_類似’所卩’只要將第一圓的閥桿2〇 更換為閥桿60且將具有該伸縮套84的外殼犯安裝 在閥體52的上端57與防洩漏裝置7〇之外蓋71之 間，就能使閥50的止漏效果能進一步提高。 本創作的止漏裝置48同時可強化閥桿6〇與軸襯 76之間的止漏性。進―步言之，當閥桿6()向上移動 至-預設位置時，閥桿6G之凸部65的頂端67會接 觸軸襯76之穿孔77下端的擴大凹部79而形成密接 止漏（見第六圖），且當該凸部65受該抽觀％阻撞 • _將形成位點使得該止流塞64上移至^^放閥體 52内部流體通道的位置。藉由凸部65與軸襯76之穿 孔77的密接能強化閥體52在開放位置的止漏效果， 同時藉由凸部65受阻擋使得閥桿6()無法隨著手輪68 的轉動上升，因而可防止閥桿6〇向上位移的距離過 大而造成伸縮套84過分壓縮以致破裂。 參閱第八圖及第十二圖，顯示本創作第二實施例 籲構成的止漏裝置48,在這實施例中，關於和第一實施 例說明者相同或同等之構件，將附上同一標號，而省 略細部結構說明。其中，該止漏裝置48適於安裝在 另一閥110上用以提供止漏效果。該閥110包含一閥 體52 ’閥體52頂部具有軸孔58。該實施例的止漏裝 置48同樣包含閥桿60、外殼82、及容納在外殼82 内的伸縮套84。閥桿60的上端66具有螺紋且連接手 輪68 ’閥桿60的下端62伸入轴孔58内且連接一螺 9 M409337 帽112 ’閥桿60的中間段63設有一環狀的凸部65， 該凸部65具有一弧狀的頂端67。螺帽112的外部具 有外螺紋114且連接止流塞64，螺帽Π2的外螺紋 114與止流塞64的内螺紋116螺合《當操作手輪68 轉動時’閥桿60 t—起轉動而上下移動，且該止流 塞64會隨著閥桿6〇上下位移但不會隨著轉動。該外 忒82文裝該閥體52的上端與該防洩漏裝置7〇之 外蓋71之間，該伸縮套84之上端99連接在該外殼 82之頂端88,該伸縮套84之下端1〇〇連接在該閥桿 60的下端62且位在該螺帽112的上側，使得該伸縮 套84的下端100會與閥桿6〇 一起做上下位移。當操 作手輪68轉動時，閥桿6〇與止流塞64會隨著上下 移動而關閉或是開放閥體52内部的流體通道；同時， 伸縮套84也會隨著閥桿6〇的上下移動而將外殼犯 的縱向孔90封閉使得閥體52内的輸送流體無法經由 外殼82的縱向孔90外茂。再者，f閥桿60向上移 動至閥桿60之凸部65的頂端67接觸軸襯76之穿孔 77下端的凹部79後（見第十一圖），該凸部65與凹 部79形成密接止漏。 在前述的實施例中，該止㈣置48的外殼82盘 該防茂漏裝置70之外蓋71係為分離的構件，秋而， 在一可行的實施例中，該止漏裝置48的外殼82與該 防洩漏裝置70之外蓋71形成一體的外殼，而該軸襯 76裝設在該外殼82之頂端88内。 在前述說明書中，本創作僅是就特定實施例做描 述’而依本創作的設計特徵是可做多種變化或修改， 例如伸縮套84可由金屬片材一體製成。是以，對於 熟悉此項技藝人士可作之明顯替換與修飾，仍將併入 於本創作所主張的專利範圍之内β 【圖式簡單說明】 第一圖係一種習用之閥的剖視圖。 第二圖係另一種習用之閥的剖視圖。 第二圖係依據本創作第一實施例構成之止漏裝置的 立體圖，並顯示該止漏裝置組合在一閥上。 第四圖係第三圖之閥與止漏裝置的元件分解圖。 第五圖係第三圖之止漏裝置的分解圖。 第六圖係沿第三圖之6_6線所取的剖視圖。 第七圖顯示第六圖之閥桿向下移動後的剖視圖。 第八圖係依據本創作第二實施例構成之止漏裝置的 立體圖’顯不該止漏裝置組裝在另-種型式的閥上。 第九圖顯示第八圖之閥與止漏裝置的元件分解圖。 第十圖係第八圖之止漏裝置的分解圖。 第十一圖係沿第八圖之mi線所取的剖視圖。 第十二圖顯示第十—圖之閥桿向下移動後的剖視圖。 M409337 【主要元件符號說明】 10·閥 14.進流口 18.轴孔 22.下端 26.上端 3 0.防沒漏裝置 32.壓塊 35. 36.軸襯 40·閥 44.外螺紋 48.止漏裝置 52.閥體 56.出流口 58.轴孔 62.下端 64.止流塞 66.上端 68.手輪 71.外蓋 74.封墊 77.穿孔 12.閥體 16.出流口 20.閥桿 24.止流塞 28.手輪 31.外蓋 34.封墊 38.螺絲 42.螺帽 46.内螺紋 50.閥 54.進流口 57.上端 60.閥桿 63.中間段 65.凸部 67.頂端 70.防洩漏裝置 72.壓塊 76.軸襯 78.螺桿The outer casing 82 is mounted between the upper end 57 of the valve body 52 and the outer cover 71 of the leakage prevention device 7 . The outer casing 82 includes a bottom end 86 and a top end 88 spaced apart in the vertical direction, and a top end 88 extending through the bottom end The longitudinal hole 90 of 86. The longitudinal bore 90 is extendable through the lower end 62 of the valve stem 60, the bottom end 86 of the outer casing 82 is coupled to the upper end 57 of the valve body 52 and the top end 88 of the peripheral 82 is coupled to the bottom of the outer cover 71. In the present embodiment, the outer casing 82 is locked to the upper end 57 of the valve body 52 by a plurality of bolts 91. The telescopic sleeve 84 is a hollow sleeve made of metal and includes a shaft hole 98. The telescopic sleeve 84 further includes an upper end 99 and a lower end 100 separated in the vertical direction. The upper end 99 is closely connected to the top of the outer casing 82. The longitudinal end 90 of the end 8 of the M409337 causes the upper end 99 of the telescoping sleeve 84 to extend through the shaft end 98 of the telescoping sleeve 84 and is coupled to the lower end 1GG by the lower end 62 of the telescoping sleeve 84 such that the lower end 100 of the telescoping sleeve 84 It will be displaced up and down together with the spacer 60. When the valve stem 60 is moved downward, the telescopic sleeve 84 is stretched downward, and on the other hand, when the mast (10) is moved upward, the telescopic sleeve 84 is contracted upward. In the present embodiment, the telescopic sleeve 84 includes a plurality of metal sheets 1〇6' separated in the vertical direction, and each of the metal #1〇6 is formed in a bent shape and the outer ends of the adjacent upper and lower metal sheets (10) are connected to each other. The outer edge of the telescopic sleeve 84 is formed in the shape of a mineral tooth. When the telescopic sleeve 84 is compressed, the adjacent upper and lower metal sheets 106 are pushed together. ^ ^ When the operating hand wheel 68 rotates, the valve stem 60 and the stop plug 64 will close or move the fluid passage inside the valve body 52 as it moves up and down (see the sixth and seventh figures); at the same time, the telescopic sleeve 84 It also expands and contracts in the longitudinal hole 9〇 of the outer casing 82 as the valve stem 6〇 moves up and down. Since the upper end 99 of the telescopic sleeve 84 is engaged in the longitudinal hole 90 of the top end 88 of the outer casing and is closed, the body is closed. The inside of the 52 body cannot pass through the longitudinal hole (10) of the outer casing 82, and therefore, the leakage preventing effect of the valve 50 can be further enhanced. Furthermore, in addition to the difference in length between the valve stem 6〇 and the valve stem 20 of the first figure, the structure of the valve 5〇 is similar to that of the first figure, as long as the first round valve stem 2〇 When the valve stem 60 is replaced and the outer casing having the bellows 84 is attached between the upper end 57 of the valve body 52 and the outer cover 71 of the leakage preventing device 7 ,, the leakage preventing effect of the valve 50 can be further improved. The leak stop device 48 of the present invention simultaneously enhances the leak tightness between the valve stem 6 〇 and the bushing 76. Further, when the valve stem 6 () is moved upward to the -predetermined position, the top end 67 of the convex portion 65 of the valve stem 6G contacts the enlarged concave portion 79 at the lower end of the through hole 77 of the bushing 76 to form a tight stop leak ( See the sixth figure), and when the convex portion 65 is blocked by the pumping %, the position will be formed such that the stop plug 64 is moved up to the position of the fluid passage inside the valve body 52. By the close contact of the convex portion 65 with the through hole 77 of the bushing 76, the leakage preventing effect of the valve body 52 in the open position can be enhanced, and at the same time, the stem portion 65 can be prevented from rising with the rotation of the hand wheel 68 by the convex portion 65 being blocked. Therefore, the distance over which the valve stem 6〇 is displaced upward can be prevented from being excessively large, causing the telescopic sleeve 84 to be excessively compressed to be broken. Referring to the eighth and twelfth drawings, the leak stop device 48 of the second embodiment of the present invention is shown. In this embodiment, the same or equivalent members as those described in the first embodiment will be given the same reference numerals. The detailed structure description is omitted. Here, the leak stop device 48 is adapted to be mounted on another valve 110 for providing a leak stop effect. The valve 110 includes a valve body 52' having a shaft bore 58 at the top of the valve body 52. The leak stop device 48 of this embodiment also includes a valve stem 60, a housing 82, and a telescoping sleeve 84 received within the housing 82. The upper end 66 of the valve stem 60 is threaded and connected to the hand wheel 68. The lower end 62 of the valve stem 60 extends into the shaft bore 58 and is connected to a screw 9 M409337. The intermediate section 63 of the valve stem 60 is provided with an annular projection 65. The convex portion 65 has an arc-shaped top end 67. The outer portion of the nut 112 has an external thread 114 and is connected to the stop plug 64. The external thread 114 of the nut Π 2 is screwed with the internal thread 116 of the stop plug 64. When the operating hand wheel 68 rotates, the valve stem 60 t rotates. While moving up and down, the stop plug 64 will move up and down with the valve stem 6〇 but will not rotate. The outer cymbal 82 is mounted between the upper end of the valve body 52 and the outer cover 71 of the leakage preventing device 7 . The upper end 99 of the telescopic sleeve 84 is connected to the top end 88 of the outer casing 82. The lower end of the telescopic sleeve 84 is 1 〇 The cymbal is connected to the lower end 62 of the valve stem 60 and is located on the upper side of the nut 112 such that the lower end 100 of the telescopic sleeve 84 is displaced up and down together with the valve stem 6 。. When the operating hand wheel 68 rotates, the valve stem 6 〇 and the stop plug 64 will close or open the fluid passage inside the valve body 52 as the upper and lower movements move; at the same time, the telescopic sleeve 84 will also follow the upper and lower sides of the valve stem 6 Movement causes the longitudinal bore 90 of the outer casing to be closed such that the transport fluid within the valve body 52 cannot be embossed through the longitudinal bore 90 of the outer casing 82. Further, after the f-valve 60 is moved upward until the tip end 67 of the convex portion 65 of the valve stem 60 contacts the concave portion 79 at the lower end of the through-hole 77 of the bushing 76 (see FIG. 11), the convex portion 65 forms a close contact with the concave portion 79. leak. In the foregoing embodiment, the outer casing 82 of the outer casing 48 is a separate member of the anti-leakage device 70, and in a possible embodiment, the outer casing of the leakage preventing device 48. 82 is integrally formed with the outer cover 71 of the leakage preventing device 70, and the bushing 76 is mounted in the top end 88 of the outer casing 82. In the foregoing description, the present invention has been described in terms of a specific embodiment only, and the design features created in accordance with the present invention can be variously changed or modified. For example, the telescopic sleeve 84 can be integrally formed from a metal sheet. Therefore, obvious substitutions and modifications to those skilled in the art will still be incorporated in the scope of the patent claimed by the present invention. [Simplified illustration of the drawings] The first figure is a cross-sectional view of a conventional valve. The second figure is a cross-sectional view of another conventional valve. The second drawing is a perspective view of the leak stop device constructed in accordance with the first embodiment of the present invention, and shows that the leak stop device is combined on a valve. The fourth figure is an exploded view of the valve and the leak stop device of the third figure. The fifth figure is an exploded view of the leak stop device of the third figure. The sixth drawing is a cross-sectional view taken along line 6_6 of the third figure. The seventh figure shows a cross-sectional view of the sixth figure after the valve stem is moved downward. The eighth drawing is a perspective view of the leak stop device constructed in accordance with the second embodiment of the present invention. It is shown that the leak stop device is assembled on another type of valve. The ninth drawing shows an exploded view of the valve and the leak stop device of the eighth figure. The tenth figure is an exploded view of the leak stop device of the eighth figure. The eleventh figure is a cross-sectional view taken along the mi line of the eighth figure. Figure 12 shows a cross-sectional view of the tenth-graph valve stem moving downward. M409337 [Description of main component symbols] 10. Valve 14. Inlet 18. Shaft hole 22. Lower end 26. Upper end 3 0. Anti-leakage device 32. Clamp 35. 36. Bushing 40 · Valve 44. External thread 48 Leak stop device 52. valve body 56. outlet port 58. shaft hole 62. lower end 64. stop plug 66. upper end 68. hand wheel 71. outer cover 74. gland 77. perforation 12. valve body 16. Flow port 20. valve stem 24. stop plug 28. hand wheel 31. outer cover 34. gland 38. screw 42. nut 46. internal thread 50. valve 54. inlet port 57. upper end 60. Intermediate section 65. Projection 67. Tip 70. Anti-leakage device 72. Press block 76. Bushing 78. Screw
12 M409337 79.凹部 82.外殼 84.伸縮套 86.底端 88.頂端 90.縱向孔 91.螺栓 98.軸孔 99.上端 100.下端 106金屬片 110.閥 112.螺帽 114.外螺紋 116.内螺紋 1312 M409337 79. recess 82. outer casing 84. telescopic sleeve 86. bottom end 88. top end 90. longitudinal hole 91. bolt 98. shaft hole 99. upper end 100. lower end 106 metal piece 110. valve 112. nut 114. 116. Internal thread 13