TWI734475B - A pipe joint connected with a pipe - Google Patents

A pipe joint connected with a pipe Download PDF

Info

Publication number
TWI734475B
TWI734475B TW109116024A TW109116024A TWI734475B TW I734475 B TWI734475 B TW I734475B TW 109116024 A TW109116024 A TW 109116024A TW 109116024 A TW109116024 A TW 109116024A TW I734475 B TWI734475 B TW I734475B
Authority
TW
Taiwan
Prior art keywords
tube
tapered surface
inner ring
pipe
transition section
Prior art date
Application number
TW109116024A
Other languages
Chinese (zh)
Other versions
TW202043660A (en
Inventor
賈建東
柯文靜
潘哲
Original Assignee
大陸商杭州科百特過濾器材有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201910412758.9 external-priority
Application filed by 大陸商杭州科百特過濾器材有限公司 filed Critical 大陸商杭州科百特過濾器材有限公司
Publication of TW202043660A publication Critical patent/TW202043660A/en
Application granted granted Critical
Publication of TWI734475B publication Critical patent/TWI734475B/en

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/02Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • F16L19/0206Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the collar not being integral with the pipe

Abstract

本發明提供一種與管子連接的管接頭,其包括接頭主體、內環和螺帽,在其內環的突出部的擴徑的錐面和縮徑的錐面之間設一過渡段,過渡段的軸向長度為突出部的軸向長度的15%~30%,過渡段的外表面上任一點的切線與內環的軸向的夾角為0°~35°,內環的軸向與擴徑的錐面間的夾角大於其與縮徑的錐面間的夾角。通過該突出部的過渡段的外表面與管子的內壁形成面接觸,作用面積增大,二者間的擠壓作用力被分散,且該過渡段還減小了管子的彎折曲率,減小對管子的損傷作用,實現擴徑的錐面與管子的內壁緊密接觸和緊固;而內環的軸向與擴徑的錐面間的夾角大於其與縮徑的錐面間的夾角則是防止高溫環境下,管子沿縮徑的錐面向外滑出。 The present invention provides a pipe joint connected with a pipe, which comprises a joint body, an inner ring and a nut. A transition section is provided between the diameter-expanded tapered surface and the reduced-diameter tapered surface of the protruding part of the inner ring. The axial length of the protrusion is 15%~30% of the axial length of the protrusion. The angle between the tangent to any point on the outer surface of the transition section and the axial direction of the inner ring is 0°~35°. The axial and enlarged diameter of the inner ring The included angle between the tapered surface is greater than the included angle between the tapered surface and the tapered surface. The outer surface of the transition section of the protruding part is in surface contact with the inner wall of the pipe, the action area is increased, the squeezing force between the two is dispersed, and the transition section also reduces the bending and curvature of the pipe. Small damage to the tube, to achieve close contact and fastening between the expanded cone surface and the inner wall of the tube; and the included angle between the axial direction of the inner ring and the expanded cone surface is greater than the included angle between it and the reduced diameter cone surface It is to prevent the tube from sliding out along the tapered surface of the reduced diameter in a high temperature environment.

Description

一種與管子連接的管接頭 A pipe joint connected with a pipe

本發明屬於管件連接技術領域,具體涉及一種用於流體輸送及流體處理過程的管接頭。 The invention belongs to the technical field of pipe fittings, and in particular relates to a pipe joint used for fluid transport and fluid treatment processes.

美國專利US5743572A公開了一種常用於半導體製造、製藥、食品加工及化學工業等技術領域製造過程中流體輸送的管接頭,如附圖1和2所示,該管接頭由接頭主體1、內環2和螺帽3三個部件構成,接頭主體1的外筒部11和內筒部12之間形成環形的槽部13。使用時,樹脂製的管子4前端經擴口後套在內環2的外周,再和內環2一起插入接頭主體1,管子4被固定在外筒部11的內部,內環2的插入部21插入槽部13,螺帽3通過螺合部32緊固在接頭主體1的外筒部11的外周。內環2與管子4接觸的一端,包括一個像山一樣的形狀的突出部22,其使得套在其外周的管子4擴徑,從而防止管子4從內環2上脫落的作用。 US Patent US5743572A discloses a pipe joint commonly used in the manufacturing process of semiconductor manufacturing, pharmacy, food processing and chemical industry for fluid transportation. As shown in Figures 1 and 2, the pipe joint consists of a joint body 1, an inner ring 2 It is composed of three parts with the nut 3, and an annular groove 13 is formed between the outer tube portion 11 and the inner tube portion 12 of the joint body 1. When in use, the front end of the resin tube 4 is flared and sleeved on the outer circumference of the inner ring 2, and then inserted into the joint body 1 together with the inner ring 2. The tube 4 is fixed inside the outer cylinder 11, and the insertion part 21 of the inner ring 2 Inserted into the groove portion 13, the nut 3 is fastened to the outer circumference of the outer cylinder portion 11 of the joint body 1 through a screwed portion 32. The end of the inner ring 2 in contact with the tube 4 includes a protrusion 22 in the shape of a mountain, which expands the diameter of the tube 4 sheathed on the outer circumference of the tube 4 to prevent the tube 4 from falling off the inner ring 2.

該內環2的突出部22的外表面包括從末端開始逐漸擴徑的錐面221和由轉折位置開始逐漸縮徑的錐面222,擴徑的錐面221和縮徑的錐面222間由一條圓形線220相連,即擴徑的錐面221和縮徑的錐面222直接相連,圓形線220對應突出部22的最厚處,從外觀上看,最厚處是尖的。管子4套在內環2的外周後,突出部22的外周抵靠管子4的內壁,突出部22的尖的最厚處與管子4的 內壁接觸最緊密、擠壓作用力最大,而在此處二者間僅形成線接觸,作用面積小,作用力非常集中,且對應管子4的彎折區域41會出現較大的曲率彎折,這兩方面的因素疊加,極易對管子4造成損傷。此外,由於擴徑的錐面221和縮徑的錐面222間僅由一條圓形線220直接相連,套在其外周的管子4由擴徑陡然變為縮徑,在圓形線220對應的區域附近,管子4的內壁和突出部22的外表面間容易存在一定的間隙,即管子4的彎折區域41附近的內壁未與突出部22的外表面緊密接觸,因此,密封性未達最佳。 The outer surface of the protrusion 22 of the inner ring 2 includes a tapered surface 221 that gradually expands in diameter from the end and a tapered surface 222 that gradually decreases in diameter from the turning position. A circular line 220 is connected, that is, the enlarged tapered surface 221 and the reduced tapered surface 222 are directly connected, and the circular line 220 corresponds to the thickest part of the protrusion 22. From the appearance, the thickest part is pointed. After the tube 4 is sleeved on the outer periphery of the inner ring 2, the outer periphery of the protrusion 22 abuts against the inner wall of the tube 4, and the thickest part of the tip of the protrusion 22 is the same as that of the tube 4 The inner wall is in the tightest contact and the squeezing force is the largest, and there is only a line contact between the two, the action area is small, the force is very concentrated, and the bending area 41 of the corresponding tube 4 will have a larger curvature. , The superposition of these two factors can easily cause damage to the tube 4. In addition, since the expanded tapered surface 221 and the reduced tapered surface 222 are directly connected by only a circular line 220, the pipe 4 sleeved on its outer circumference changes suddenly from an expanded diameter to a reduced diameter. In the vicinity of the area, a certain gap is likely to exist between the inner wall of the tube 4 and the outer surface of the protrusion 22, that is, the inner wall near the bending area 41 of the tube 4 is not in close contact with the outer surface of the protrusion 22, so the sealing performance is not good. Reach the best.

此外,由於突出部22的擴徑的錐面221和縮徑的錐面222的傾斜角設置不合理,當擴徑的錐面221傾斜角過小,縮徑的錐面222的傾斜角又比較大時,而擴徑的錐面221和縮徑的錐面222間僅由一條圓形線220直接相連,不能有效阻止管子4的滑動,當管接頭和管子4用於高溫環境中,管子4受熱軟化後,極易沿著縮徑的錐面222向外滑出,從而導致洩露。 In addition, because the inclination angles of the enlarged diameter tapered surface 221 and the reduced diameter tapered surface 222 of the protrusion 22 are set unreasonably, when the inclination angle of the enlarged diameter tapered surface 221 is too small, the inclination angle of the reduced diameter tapered surface 222 is relatively large. However, the expanded tapered surface 221 and the reduced tapered surface 222 are directly connected by only a circular line 220, which cannot effectively prevent the sliding of the pipe 4. When the pipe joint and the pipe 4 are used in a high temperature environment, the pipe 4 is heated After being softened, it is easy to slide out along the tapered surface 222 of the reduced diameter, thereby causing leakage.

為解決現有的管接頭的內環的突出部容易對管子造成損傷,突出部的最厚處附近的外表面未能與管子的內壁緊密接觸及高溫環境下管子沿著內環向外滑出導致的密封失效的問題,本發明提供一種與管子連接的管接頭。該管接頭包括:接頭主體,其具有同軸設置主體筒部、外筒部和內筒部,所述的外筒部和內筒部由主體筒部向同一方向突出的設置,所述的內筒部設置於外筒部的內側,所述的外筒部的突出於主體筒部的長度大於內筒部的突出於主 體筒部的長度,由所述的主體筒部、外筒部和內筒部包圍形成一槽部,所述的槽部的開口方向與外筒部和內筒部的突出方向相同;內環,其具有依次同軸連續設置的筒狀的插入部、筒狀的嵌合部、筒狀的連結部和突出部及位於中心的流體通道,所述的嵌合部以可拆卸的方式嵌合於外筒部的徑向內側,所述的插入部從嵌合部的一側突出的設置,並由所述的接頭主體的槽部的開口插入該槽部,所述的連結部和突出部從嵌合部的另一側突出設置,所述的突出部的外表面包括擴徑的錐面和縮徑的錐面,所述的擴徑的錐面位於突出部的最末端,所述的縮徑的錐面位於連結部和擴徑的錐面之間,所述的突出部和連結部壓入管子一端的內部,並將管子夾在其與所述的外筒部之間,該內環能夠在與管子連結的狀態下與接頭主體連接或脫離;螺帽,其通過內螺紋緊固於所述的接頭主體的外筒部,並與所述的內環一起將管子緊固於所述的接頭主體;其中,所述的擴徑的錐面和縮徑的錐面之間設有過渡段,所述的過渡段的軸向長度為突出部的軸向長度的15%~30%,所述的過渡段的外表面上任一點的切線與內環的軸向的夾角為0°~35°,所述的內環的軸向與擴徑的錐面間的夾角大於其與縮徑的錐面間的夾角。 In order to solve the problem that the protruding part of the inner ring of the existing pipe joint is likely to cause damage to the pipe, the outer surface near the thickest part of the protruding part fails to make close contact with the inner wall of the pipe, and the pipe slides out along the inner ring in a high temperature environment. The problem of sealing failure caused by the present invention provides a pipe joint connected with a pipe. The pipe joint includes: a joint main body, which has a main body cylinder part, an outer cylinder part and an inner cylinder part coaxially arranged. The part is arranged on the inner side of the outer tube part, and the length of the outer tube part protruding from the main body tube part is longer than that of the inner tube part protruding from the main body. The length of the body cylinder is surrounded by the main cylinder, the outer cylinder and the inner cylinder to form a groove, and the opening direction of the groove is the same as the protrusion direction of the outer cylinder and the inner cylinder; the inner ring , It has a cylindrical insertion part, a cylindrical fitting part, a cylindrical connecting part and a protruding part, and a fluid channel located in the center, which are arranged coaxially and continuously in sequence, and the fitting part is detachably fitted in On the radially inner side of the outer cylinder, the insertion part protrudes from one side of the fitting part, and is inserted into the groove part through the opening of the groove part of the joint body, and the connecting part and the protruding part are from The other side of the fitting portion is protrudingly arranged, and the outer surface of the protruding portion includes a tapered surface with an enlarged diameter and a tapered surface with a reduced diameter. The tapered surface of the diameter is located between the connecting portion and the enlarged tapered surface. The protruding portion and the connecting portion are pressed into the inside of one end of the tube, and the tube is clamped between it and the outer tube. The inner ring It can be connected to or disconnected from the main body of the joint while being connected to the pipe; a nut, which is fastened to the outer cylinder of the main body of the joint through internal threads, and together with the inner ring to fasten the pipe to the The main body of the joint; wherein a transition section is provided between the tapered surface of the enlarged diameter and the tapered surface of the reduced diameter, and the axial length of the transition section is 15% to 30% of the axial length of the protrusion, The included angle between the tangent of any point on the outer surface of the transition section and the axial direction of the inner ring is 0°~35°, and the included angle between the axial direction of the inner ring and the tapered surface of the enlarged diameter is greater than the angle between the axial direction of the inner ring and the tapered surface of the reduced diameter. The angle between the cones.

現有的管接頭的內環的突出部的外表面包括從末端開始逐漸擴徑的錐面和由轉折位置開始逐漸縮徑的錐面,擴徑的錐面和縮徑的錐面間僅由一條圓形線相連,即擴徑的錐面和縮徑的錐面直接相連,圓形線對應突出部的最厚處,從外觀上看,最厚處是尖的。內環的突出部插入管子一端的內部,突出部的外周抵靠管子的內壁,該尖的最厚處與管子的內壁接觸最緊密、擠壓作 用力最大,而在此處二者間僅形成線接觸,作用面積小,作用力非常集中,且在該區域管子會出現較大的曲率彎折,這兩方面的因素疊加,對管子造成極大的損傷。 The outer surface of the protruding part of the inner ring of the existing pipe joint includes a tapered surface that gradually expands in diameter from the end and a tapered surface that gradually decreases in diameter from the turning position. The circular line is connected, that is, the tapered surface of the enlarged diameter is directly connected to the tapered surface of the reduced diameter. The circular line corresponds to the thickest part of the protrusion. From the appearance, the thickest part is sharp. The protruding part of the inner ring is inserted into the inside of one end of the tube, and the outer periphery of the protruding part abuts against the inner wall of the tube. The maximum force is exerted, and only a line contact is formed between the two here, the action area is small, the action force is very concentrated, and the tube will have a larger curvature in this area. The superposition of these two factors will cause great damage to the tube. damage.

現有的管接頭中,內環的突出部擴徑的錐面和縮徑的錐面間僅由一條圓形線直接相連,套在其外周的管子由擴徑陡然變為縮徑,在圓形線對應的區域附近,管子的內壁和突出部的外表面間容易存在一定的間隙,即管子的相應區域的內壁未與突出部的最厚處的外表面緊密接觸,因此,管接頭與管子間的密封性未能達到最佳。 In the existing pipe joints, the expanded tapered surface and the reduced tapered surface of the protruding part of the inner ring are directly connected by only a circular line. Near the area corresponding to the line, a certain gap is likely to exist between the inner wall of the tube and the outer surface of the protrusion, that is, the inner wall of the corresponding area of the tube is not in close contact with the outer surface of the thickest part of the protrusion. Therefore, the pipe joint and the outer surface of the protrusion The tightness between the tubes is not optimal.

另外,由於突出部的擴徑的錐面和縮徑的錐面的傾斜角設置不合理,擴徑的錐面傾斜角過小,縮徑的錐面的傾斜角又比較大時,而擴徑的錐面和縮徑的錐面間僅由一條圓形線直接相連,不能有效阻止管子的滑動,當管接頭和管子用於高溫環境中,管子受熱軟化後,極易沿著縮徑的錐面向外滑出,從而導致洩露。 In addition, due to the unreasonable setting of the inclination angles of the enlarged tapered surface and the reduced tapered surface of the protruding part, the inclination angle of the enlarged tapered surface is too small, and the inclination angle of the reduced tapered surface is relatively large. The tapered surface and the tapered surface of the reduced diameter are directly connected by only a circular line, which cannot effectively prevent the sliding of the pipe. When the pipe joint and the pipe are used in a high temperature environment, the pipe will easily follow the tapered surface of the reduced diameter after being heated and softened. Slide out, causing leakage.

本發明提供的管接頭,在所述的內環的突出部的擴徑的錐面和縮徑的錐面之間加設過渡段,所述的過渡段的軸向長度為突出部的軸向長度的15%~30%。該內環的連結部和突出部插入管子一端的內部後,突出部的最厚處通過該過渡段的外表面與管子的內壁形成面接觸,作用面積增大,二者間的擠壓作用力被分散,且該過渡段的外表面還減小了管子的彎折曲率,兩種作用疊加,大大減小了對管子的損傷。 In the pipe joint provided by the present invention, a transition section is added between the expanded tapered surface and the reduced diameter tapered surface of the protrusion of the inner ring, and the axial length of the transition section is the axial length of the protrusion. 15%~30% of length. After the connecting part and the protrusion of the inner ring are inserted into the inside of one end of the tube, the thickest part of the protrusion is in surface contact with the inner wall of the tube through the outer surface of the transition section. The force is dispersed, and the outer surface of the transition section also reduces the bending curvature of the tube. The two effects are superimposed, which greatly reduces the damage to the tube.

此外,該內環的過渡段的外表面上任一點的切線與內環的軸向的夾角為0°~35°,當突出部插入管子一端的內部後,管子的彎折曲率始終落在 其可承受的範圍內,減小對管子的損傷,並確保管子的內壁與突出部的外表面緊密接觸、不留空隙,改善管子與內環間的密封效果。 In addition, the angle between the tangent at any point on the outer surface of the transition section of the inner ring and the axial direction of the inner ring is 0°~35°. When the protrusion is inserted into the inside of one end of the tube, the bending curvature of the tube always falls on Within the range that it can bear, the damage to the tube is reduced, and the inner wall of the tube is in close contact with the outer surface of the protrusion without leaving any gap, and the sealing effect between the tube and the inner ring is improved.

此外,內環的軸向與擴徑的錐面間的夾角大於其與縮徑的錐面間的夾角,其使得處於末端的擴徑的錐面形成管子沿著縮徑的錐面向外滑出的阻礙,可阻止管子沿縮徑的錐面及過渡段向外滑出。當所述的管接頭和管子用於高溫環境下,管子受熱變軟後,管子可能會沿著縮徑的錐面滑動一定的距離,但是由於末端的擴徑的錐面與內環的軸向間的夾角大於縮徑的錐面與內環的軸向間的夾角,那麼擴徑的錐面可阻止管子的滑出,不利於管子的滑出,進而確保了高溫環境下管接頭和管子間的可靠密封性。 In addition, the included angle between the axial direction of the inner ring and the tapered surface of the enlarged diameter is greater than the included angle between the tapered surface of the enlarged diameter and the tapered surface of the reduced diameter. The obstruction can prevent the pipe from sliding out along the tapered surface and transition section of the reduced diameter. When the described pipe joints and pipes are used in a high temperature environment, after the pipes are heated and softened, the pipes may slide a certain distance along the tapered surface of the reduced diameter. The included angle is greater than the included angle between the tapered surface of the reduced diameter and the axial direction of the inner ring. The tapered surface of the enlarged diameter can prevent the pipe from sliding out, which is not conducive to the sliding out of the pipe, thereby ensuring the connection between the pipe joint and the pipe in a high temperature environment. The reliable sealing performance.

進一步地,所述的內環的軸向與擴徑的錐面間的夾角為25~35°,所述的內環的軸向與縮徑的錐面間的夾角為10~20°。 Further, the included angle between the axial direction of the inner ring and the tapered surface of the enlarged diameter is 25-35°, and the included angle between the axial direction of the inner ring and the tapered surface of the reduced diameter is 10-20°.

內環的軸向與擴徑的錐面間的夾角為25~35°,與縮徑的錐面間的夾角為10~20°時,確保在高溫環境下,管子不會沿著縮徑的錐面向外滑出和密封性良好的前提下,儘量減小管子的彎折曲率,使管子的彎折曲率始終落在其可承受的範圍內,減小對管子的損傷,延長管子的使用壽命。 The angle between the axial direction of the inner ring and the tapered surface of the enlarged diameter is 25~35°, and when the angle between the tapered surface of the reduced diameter is 10-20°, it is ensured that the pipe will not follow the tapered surface of the reduced diameter in a high temperature environment. On the premise that the cone surface slides out and the sealing is good, try to reduce the bending curvature of the tube, so that the bending curvature of the tube always falls within its tolerable range, reducing the damage to the tube and prolonging the service life of the tube .

進一步地,所述的過渡段的外表面為等徑的圓柱面且與所述的內環的軸向平行,且所述的圓柱面具有一定的軸向長度。 Further, the outer surface of the transition section is a cylindrical surface of equal diameter and parallel to the axial direction of the inner ring, and the cylindrical surface has a certain axial length.

所述的擴徑的錐面和縮徑的錐面通過該圓柱面過渡相連,圓柱面不利於管子的滑動,所以可防止管子從內環上滑出。 The expanded tapered surface and the reduced tapered surface are transitionally connected by the cylindrical surface, and the cylindrical surface is not conducive to the sliding of the tube, so the tube can be prevented from slipping out of the inner ring.

進一步地,所述的過渡段的外表面為球面。 Further, the outer surface of the transition section is spherical.

擴徑的錐面和縮徑的錐面之間通過該球面過渡相連,連接處為光滑連接,球面與管子的內壁接觸更緊密,密封效果更好,且管子的形變是漸變的,可減小管子的彎折曲率,減輕對管子的損傷。 The tapered surface of the enlarged diameter and the tapered surface of the reduced diameter are connected by the spherical transition, and the connection is smoothly connected. The spherical surface is in closer contact with the inner wall of the pipe, and the sealing effect is better. The deformation of the pipe is gradual and can be reduced. The bending and curvature of the small tube reduces the damage to the tube.

進一步地,所述的過渡段的外徑最大的點與流體通道的外表面間的徑向距離為所述的連結部的外表面與流體通道的外表面間的徑向距離的1.5~2.5倍。 Further, the radial distance between the point with the largest outer diameter of the transition section and the outer surface of the fluid channel is 1.5 to 2.5 times the radial distance between the outer surface of the connecting portion and the outer surface of the fluid channel .

進一步地,所述的過渡段的外徑最大的點與流體通道的外表面間的徑向距離為所述的嵌合部的外表面與流體通道的外表面間的徑向距離的1.05~1.2倍。 Further, the radial distance between the point with the largest outer diameter of the transition section and the outer surface of the fluid channel is 1.05~1.2 of the radial distance between the outer surface of the fitting portion and the outer surface of the fluid channel. Times.

當所述的突出部的過渡段的外徑最大的點與流體通道的外表面間的徑向距離為所述的連結部的外表面與流體通道的外表面間的徑向距離的1.5~2.5倍時,及當所述的過渡段的外徑最大的點與流體通道的外表面間的徑向距離為所述的嵌合部的外表面與流體通道的外表面間的徑向距離的1.05~1.2倍時,則能夠將管子牢固地卡在所述的內環和外筒部之間,增大了內環和外筒部對管子的緊固作用力,防止管子滑出。 When the radial distance between the point with the largest outer diameter of the transition section of the protrusion and the outer surface of the fluid channel is 1.5 to 2.5 of the radial distance between the outer surface of the connecting portion and the outer surface of the fluid channel Times, and when the radial distance between the point with the largest outer diameter of the transition section and the outer surface of the fluid channel is 1.05 of the radial distance between the outer surface of the fitting portion and the outer surface of the fluid channel When ~1.2 times, the tube can be firmly clamped between the inner ring and the outer tube, which increases the fastening force of the inner ring and the outer tube to the tube and prevents the tube from slipping out.

進一步地,所述的內環還包括筒狀的抵接部,所述的抵接部與插入部同軸設置、並位於所述的插入部的同一側的徑向內部,所述的內環安裝完成後,所述的抵接部接觸、抵接所述的接頭主體的內筒部。該抵接部進一步改善內環與接頭本體間的密封性。 Further, the inner ring further includes a cylindrical abutting portion, the abutting portion is arranged coaxially with the insertion portion, and is located radially inside the same side of the insertion portion, and the inner ring is installed After completion, the abutting part contacts and abuts the inner cylinder part of the joint body. The abutting portion further improves the sealing performance between the inner ring and the joint body.

進一步地,所述的螺帽包括螺合部和按壓部,所述的螺合部與外筒部外周的螺紋螺合,所述的按壓部將管子和內環向主體筒部的方向按壓,將所述的插入部壓入槽部,從而將所述的內環和管子緊固於接頭主體。 Further, the nut includes a screwed part and a pressing part, the screwed part is screwed with the thread on the outer circumference of the outer cylinder part, and the pressing part presses the tube and the inner ring toward the main body cylinder, The insertion part is pressed into the groove part to fasten the inner ring and the pipe to the joint body.

進一步地,所述的插入部的徑向厚度等於或稍大於槽部的徑向寬度,或者所述的插入部的徑向厚度為槽部的徑向寬度的1.2-1.5倍。在保證所述的插入部能夠順利插入槽部內的前提下,將插入部牢固地卡在槽部內。 Further, the radial thickness of the insertion portion is equal to or slightly larger than the radial width of the groove portion, or the radial thickness of the insertion portion is 1.2-1.5 times the radial width of the groove portion. On the premise that the insertion part can be smoothly inserted into the groove part, the insertion part is firmly clamped in the groove part.

進一步地,從所述的嵌合部向插入部的末端延伸的方向,所述的插入部的徑向厚度逐漸減小,即所述的插入部為前端尖細的形狀。前端尖細的插入部更容易插入槽部,內環的安裝更容易。 Further, in the direction extending from the inserting portion to the end of the inserting portion, the radial thickness of the inserting portion gradually decreases, that is, the inserting portion has a tapered shape. The tapered insertion part is easier to insert into the groove part, and the installation of the inner ring is easier.

本發明提供的管接頭,在其內環的突出部的擴徑的錐面和縮徑的錐面之間設一過渡段,過渡段的軸向長度為突出部的軸向長度的15%~30%,過渡段的外表面上任一點的切線與內環的軸向的夾角為0°~35°,內環的軸向與擴徑的錐面間的夾角大於其與縮徑的錐面間的夾角。通過該突出部的過渡段的外表面與管子的內壁形成面接觸,作用面積增大,二者間的擠壓作用力被分散,且該過渡段還減小了管子的彎折曲率,減小對管子的損傷作用,實現擴徑的錐面與管子的內壁緊密接觸和緊固;而內環的軸向與擴徑的錐面間的夾角大於其與縮徑的錐面間的夾角,即使用於高溫環境下,管子也不會沿縮徑的錐面和過渡段向外滑出。 In the pipe joint provided by the present invention, a transition section is provided between the enlarged tapered surface and the reduced tapered surface of the protrusion of the inner ring, and the axial length of the transition section is 15% of the axial length of the protrusion. 30%, the included angle between the tangent of any point on the outer surface of the transition section and the axial direction of the inner ring is 0°~35°, and the included angle between the axial direction of the inner ring and the tapered surface of the enlarged diameter is greater than the angle between it and the tapered surface of the reduced diameter的角。 The included angle. The outer surface of the transition section of the protruding part is in surface contact with the inner wall of the pipe, the action area is increased, the squeezing force between the two is dispersed, and the transition section also reduces the bending and curvature of the pipe. Small damage to the tube, to achieve close contact and fastening between the expanded cone surface and the inner wall of the tube; and the included angle between the axial direction of the inner ring and the expanded cone surface is greater than the included angle between it and the reduced diameter cone surface , Even if it is used in a high temperature environment, the tube will not slide out along the tapered surface and transition section of the reduced diameter.

1:接頭本體 1: Connector body

10:主體筒部 10: The main body tube

11:外筒部 11: Outer cylinder

12:內筒部 12: Inner cylinder

13:槽部 13: Groove

2:內環 2: inner ring

20:嵌合部 20: Fitting part

21:插入部 21: Insertion part

22:突出部 22: protrusion

220:圓形線 220: round wire

221:擴徑的錐面 221: Expanded cone

222:縮徑的錐面 222: reduced cone

223:過渡段 223: Transition section

23:連結部 23: Connection

24:流體通道 24: fluid channel

25:抵接部 25: Buttress

3:螺帽 3: nut

31:按壓部 31: Pressing part

32:螺合部 32: Screw part

4:管子 4: tube

41:彎折區域 41: bending area

D1:徑向厚度 D1: Radial thickness

D2:徑向寬度 D2: Radial width

L1:徑向距離 L1: Radial distance

L2:徑向距離 L2: Radial distance

L3:徑向距離 L3: Radial distance

W1:軸向長度 W1: axial length

W2:軸向長度 W2: axial length

θ1:夾角 θ1: included angle

θ2:夾角 θ2: included angle

θ3:夾角 θ3: included angle

下面結合附圖對本發明作進一步說明:〔圖1〕為先前技術公開的管接頭的內環的剖視圖 The present invention will be further described below with reference to the accompanying drawings: [Figure 1] is a cross-sectional view of the inner ring of the pipe joint disclosed in the prior art

〔圖2〕為先前技術公開的管接頭與管子安裝完成後的剖視圖 [Figure 2] is a cross-sectional view of the pipe joints and pipes disclosed in the prior art after the installation is completed

〔圖3〕為本發明的實施例一提供的內環的剖視圖 [Figure 3] is a cross-sectional view of the inner ring provided by the first embodiment of the present invention

〔圖4〕為本發明的實施例一提供的管接頭與管子完成後的剖視圖 [Figure 4] is a cross-sectional view of the pipe joint and the pipe provided in the first embodiment of the present invention

〔圖5〕為將圖4所示的管接頭在將內環從接頭主體上滑出後的局部剖視圖 [Figure 5] is a partial cross-sectional view of the pipe joint shown in Figure 4 after sliding the inner ring out of the joint body

〔圖6〕為本發明的實施例二提供的內環的剖視圖 [Figure 6] is a cross-sectional view of the inner ring provided by the second embodiment of the present invention

為了能夠更清楚地理解本發明的上述目的、特徵和優點,下面結合附圖和具體實施方式對本發明進行進一步的詳細描述。需要說明的是,在不衝突的情況下,本申請的實施例及實施例中的特徵可以相互組合。 In order to be able to understand the above objectives, features and advantages of the present invention more clearly, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the application and the features in the embodiments can be combined with each other if there is no conflict.

在下面的描述中闡述了很多具體細節以便於充分理解本發明,但是,本發明還可以採用其他不同於在此描述的其他方式來實施,因此,本發明的保護範圍並不受下面公開的具體實施例的限制。 In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited to the specific details disclosed below. Limitations of the embodiment.

實施例一 Example one

如圖3-4所示,該管接頭包括:接頭主體1,其具有同軸設置主體筒部10、外筒部11和內筒部12,外筒部11和內筒部12由主體筒部10向同一方向突出的設置,內筒部12設置於外筒部11的內側,外筒部11的突出於主體筒部10的長度大於內筒部12的突出於主體筒部10的長度,由主體筒部10、外筒部11和內筒部12包圍形成一槽部13,槽部13的開口方向與外筒部11和內筒部12的突出方向相同。 As shown in Figures 3-4, the pipe joint includes: a joint body 1, which has a main body tube portion 10, an outer tube portion 11, and an inner tube portion 12 that are coaxially arranged. Protruding in the same direction, the inner tube 12 is provided on the inner side of the outer tube 11, and the length of the outer tube 11 protruding from the main body tube 10 is greater than the length of the inner tube 12 protruding from the main body tube 10. The cylindrical portion 10, the outer cylindrical portion 11 and the inner cylindrical portion 12 surround and form a groove 13, and the opening direction of the groove 13 is the same as the protruding direction of the outer cylindrical portion 11 and the inner cylindrical portion 12.

內環2,其具有依次同軸連續設置的筒狀的插入部21、筒狀的嵌合部20、筒狀的連結部23和突出部22及位於中心的流體通道24,嵌合部20以可拆卸的方式嵌合於外筒部11的徑向內側,插入部21從嵌合部20的一側突出的設置,並由接頭主體1的槽部13的開口插入該槽部13,連結部23和突出部22從嵌合部20的另一側突出設置。 The inner ring 2 has a cylindrical insertion portion 21, a cylindrical fitting portion 20, a cylindrical connecting portion 23 and a protruding portion 22, and a fluid passage 24 located in the center, which are successively arranged coaxially and continuously. The fitting portion 20 can be It is fitted on the radially inner side of the outer cylinder portion 11 in a detachable manner, and the insertion portion 21 is provided protruding from one side of the fitting portion 20, and is inserted into the groove portion 13 through the opening of the groove portion 13 of the joint body 1, and the connecting portion 23 And the protruding part 22 protrudes from the other side of the fitting part 20.

突出部22和連結部23壓入管子4一端的內部,並將管子4夾在其與外筒部11之間,該內環2能夠在與管子4連結的狀態下與接頭主體1連接或脫離。 The protruding portion 22 and the connecting portion 23 are pressed into the inside of one end of the tube 4, and the tube 4 is sandwiched between the tube 4 and the outer tube portion 11. The inner ring 2 can be connected to or disconnected from the joint body 1 while being connected to the tube 4 .

內環2還包括筒狀的抵接部25,該抵接部25與插入部21同軸設置、並位於插入部21的同一側的徑向內部。內環2安裝完成後,抵接部25接觸、抵接接頭主體1的內筒部12。該抵接部25進一步改善內環2與接頭本體1間的密封性。 The inner ring 2 further includes a cylindrical abutting portion 25 which is arranged coaxially with the insertion portion 21 and located in the radially inner part of the same side of the insertion portion 21. After the inner ring 2 is installed, the abutting portion 25 contacts and abuts the inner cylindrical portion 12 of the joint body 1. The abutting portion 25 further improves the sealing performance between the inner ring 2 and the joint body 1.

螺帽3,其透過內螺紋緊固於接頭主體1的外筒部11,並與內環2一起將管子4緊固於接頭主體1。螺帽3包括螺合部32和按壓部31,螺合部32與外筒部11外周的螺紋螺合,按壓部31將管子4和內環2向主體筒部10的方向按壓,將插入部21壓入槽部13,從而將內環2和管子4緊固於接頭主體1。 The nut 3 is fastened to the outer cylindrical portion 11 of the joint body 1 through internal threads, and together with the inner ring 2, the pipe 4 is fastened to the joint body 1. The nut 3 includes a screwed portion 32 and a pressing portion 31. The screwed portion 32 is screwed to the thread on the outer circumference of the outer cylinder portion 11. The pressing portion 31 presses the tube 4 and the inner ring 2 in the direction of the main body cylinder portion 10. 21 is pressed into the groove 13 to fasten the inner ring 2 and the pipe 4 to the joint body 1.

如附圖3所示,突出部22的外表面包括擴徑的錐面221、縮徑的錐面222及位於二者間的過渡段223,過渡段223的外表面為一段等徑的圓柱面,擴徑的錐面221位於突出部22的最末端,縮徑的錐面222位於連結部23與過渡段223之間。 As shown in FIG. 3, the outer surface of the protrusion 22 includes a tapered surface 221 with an enlarged diameter, a tapered surface 222 with a reduced diameter, and a transition section 223 located between the two. The outer surface of the transition section 223 is a cylindrical surface with an equal diameter. The tapered surface 221 with an enlarged diameter is located at the extreme end of the protruding portion 22, and the tapered surface 222 with a reduced diameter is located between the connecting portion 23 and the transition section 223.

本發明提供的管接頭,由於在內環2的突出部22的擴徑的錐面221和縮徑的錐面222之間加設了過渡段223,其使得擴徑的錐面221和縮徑的錐面222通過該過渡段223過渡相連。 In the pipe joint provided by the present invention, the transition section 223 is added between the expanded tapered surface 221 and the reduced tapered surface 222 of the protrusion 22 of the inner ring 2, which makes the expanded tapered surface 221 and the reduced diameter The tapered surfaces 222 are transitionally connected by the transition section 223.

該內環2的連結部23和突出部22插入管子4一端的內部後,突出部的22最厚處通過該過渡段223的外表面與管子4的內壁形成面接觸,作用面積增大,管子4和突出部22間的擠壓作用力被分散,且該過渡段223的外表面還減小了管子4的彎折曲率,兩種作用疊加,大大減小了對管子4損傷。當過渡段 223的軸向長度W2為突出部22的軸向長度W1的15%~30%時,過渡段223在產生分散突出部22和管子4的擠壓作用力的基礎上,突出部22的外表面能夠與管子4的內壁緊密接觸,並最小化管子4的彎折曲率。當W2/W1小於15%時,管子4和突出22間的擠壓作用面積增大的幅度有限,管子4和突出部22間的擠壓作用力還是比較大,管接頭與管子4安裝後會出現如表1所示的洩露。當W2/W1大於30%時,由過渡段223的軸向長度W2過長,而突出部22對應的軸向長度W1是一定的,那麼擴徑的錐面221和縮徑的錐面222對應的軸向長度過短,會導致擴徑的錐面221和縮徑的錐面222與內環2的軸向間的夾角過大,那麼管子4的彎折曲率也就比較大,對管子4的損傷作用大。 After the connecting portion 23 and the protruding portion 22 of the inner ring 2 are inserted into the inside of one end of the tube 4, the thickest part of the protruding portion 22 is in surface contact with the inner wall of the tube 4 through the outer surface of the transition section 223, and the effective area is increased. The squeezing force between the tube 4 and the protrusion 22 is dispersed, and the outer surface of the transition section 223 also reduces the bending curvature of the tube 4, and the two effects are superimposed, which greatly reduces the damage to the tube 4. When the transition When the axial length W2 of 223 is 15% to 30% of the axial length W1 of the protrusion 22, the transition section 223 generates the squeezing force of the protrusion 22 and the tube 4, and the outer surface of the protrusion 22 It can be in close contact with the inner wall of the tube 4, and the bending curvature of the tube 4 is minimized. When W2/W1 is less than 15%, the increase of the extrusion area between the tube 4 and the protrusion 22 is limited, and the extrusion force between the tube 4 and the protrusion 22 is still relatively large. There is a leak as shown in Table 1. When W2/W1 is greater than 30%, the axial length W2 of the transition section 223 is too long, and the axial length W1 corresponding to the protruding portion 22 is constant, then the expanded tapered surface 221 and the reduced diameter tapered surface 222 correspond to The axial length of the tube 4 is too short, which will cause the angle between the expanded tapered surface 221 and the reduced tapered surface 222 and the axial direction of the inner ring 2 to be too large, and the bending curvature of the tube 4 will be relatively large. The damage effect is great.

Figure 109116024-A0305-02-0012-1
Figure 109116024-A0305-02-0012-1
Figure 109116024-A0305-02-0013-2
Figure 109116024-A0305-02-0013-2

過渡段223的外表面為與內環2的軸向平行的圓柱面,過渡段223的外表面上任一點的切線與內環2的軸向的夾角為0°,當突出部22插入管子4一端的內部後,管子4的彎折曲率始終落在其可承受的範圍內,減小對管子4的損傷,並確保管子4的內壁與突出部22的外表面緊密接觸、不留空隙,改善管子4與內環2間的密封效果。 The outer surface of the transition section 223 is a cylindrical surface parallel to the axial direction of the inner ring 2, and the angle between the tangent to any point on the outer surface of the transition section 223 and the axial direction of the inner ring 2 is 0°. When the protrusion 22 is inserted into one end of the tube 4 After the inside of the tube 4, the bending curvature of the tube 4 always falls within its acceptable range, reducing the damage to the tube 4, and ensuring that the inner wall of the tube 4 is in close contact with the outer surface of the protrusion 22, leaving no gaps, improving The sealing effect between the tube 4 and the inner ring 2.

此外,內環2的軸向與擴徑的錐面221間的夾角θ1大於其與縮徑的錐面222間的夾角θ2,則使得處於末端的擴徑的錐面221形成管子4沿著縮徑的錐面222向外滑出的阻礙,可防止管子4沿著縮徑的錐面222和過渡段223滑出。當管接頭和管子4用於高溫環境下,管子4受熱變軟後,管子4可能會沿著縮徑的錐面222滑動一定的距離,但是由於末端的擴徑的錐面221與內環2的軸向間的夾角θ1大於縮徑的錐面222與內環2的軸向間的夾角θ2,不利於管子4的滑動,那麼擴徑的錐面221可阻止管子4的滑出,進而確保了高溫環境下管接頭和管子4間的可靠密封性。 In addition, the included angle θ1 between the axial direction of the inner ring 2 and the enlarged diameter tapered surface 221 is greater than the included angle θ2 between the inner ring 2 and the reduced diameter tapered surface 222, so that the enlarged diameter tapered surface 221 at the end forms the tube 4 along the contraction. The obstruction of the tapered surface 222 of the diameter from sliding out can prevent the tube 4 from sliding out along the tapered surface 222 and the transition section 223 of the reduced diameter. When the pipe joint and the pipe 4 are used in a high temperature environment, after the pipe 4 is heated and softened, the pipe 4 may slide a certain distance along the tapered surface 222 of reduced diameter, but due to the end of the tapered surface 221 and the inner ring 2 The included angle θ1 between the axial directions is greater than the included angle θ2 between the reduced diameter tapered surface 222 and the axial direction of the inner ring 2, which is not conducive to the sliding of the pipe 4, so the enlarged tapered surface 221 can prevent the pipe 4 from sliding out, thereby ensuring This improves the reliable sealing performance between the pipe joint and the pipe 4 in a high temperature environment.

進一步地,內環2的軸向與擴徑的錐面221間的夾角θ1為25~35°,內環2的軸向與縮徑的錐面222間的夾角θ2為10~20°時,確保在高溫環境下,管子4不會沿著縮徑的錐面222向外滑出和密封性良好的前提下,儘量減小管子4的彎折曲率,使管子4的彎折曲率始終落在其可承受的範圍內,減小對管子4的損傷,延長管子4的使用壽命。 Further, when the included angle θ1 between the axial direction of the inner ring 2 and the enlarged diameter tapered surface 221 is 25 to 35°, and the included angle θ2 between the axial direction of the inner ring 2 and the reduced diameter tapered surface 222 is 10 to 20°, To ensure that the tube 4 will not slide out along the tapered surface 222 of the reduced diameter under the condition of good sealing performance in a high temperature environment, minimize the bending curvature of the tube 4 so that the bending curvature of the tube 4 always falls on Within the tolerable range, damage to the tube 4 is reduced and the service life of the tube 4 is prolonged.

當內環2的軸向與擴徑的錐面221間的夾角θ1大於35°時,雖然管子4的內壁與擴徑的錐面221間緊密接觸,進而確保管接頭與管子4間的密封 性,但是處於擴徑的錐面221外側的管子4的相應區域的彎折曲率比較大,對管子4的損傷作用也比較大。如果進一步增大內環2的軸向與擴徑的錐面221間的夾角θ1,管子4的相應彎折曲率也會進一步增大,對管子4的損害作用進一步加大。而當內環2的軸向與擴徑的錐面221間的夾角θ1小於25°時,管子4的內壁與擴徑的錐面221間的接觸、擠壓作用力不夠,當用於高溫環境時,管子4受熱變軟,存在從內環2上滑出的可能,因而容易發生如表2所示的洩漏的情況。 When the included angle θ1 between the axial direction of the inner ring 2 and the enlarged tapered surface 221 is greater than 35°, although the inner wall of the pipe 4 is in close contact with the enlarged tapered surface 221, the sealing between the pipe joint and the pipe 4 is ensured However, the bending curvature of the corresponding area of the tube 4 outside the enlarged tapered surface 221 is relatively large, and the damage effect on the tube 4 is relatively large. If the angle θ1 between the axial direction of the inner ring 2 and the enlarged tapered surface 221 is further increased, the corresponding bending curvature of the tube 4 will also be further increased, and the damage to the tube 4 will be further increased. When the included angle θ1 between the axial direction of the inner ring 2 and the expanded cone surface 221 is less than 25°, the contact and extrusion force between the inner wall of the tube 4 and the expanded cone surface 221 is insufficient. In the environment, the tube 4 is heated and softened, and there is a possibility of slipping out of the inner ring 2, so that leakage as shown in Table 2 is prone to occur.

當內環2的軸向與縮徑的錐面222間的夾角θ2小於10°時,內環2的軸向與擴徑的錐面221間的夾角θ1也大於35°,管子4的內壁不能與縮徑的錐面222緊密接觸、擠壓,當用於高溫環境時,管子4受熱變軟,存在滑出的可能,而對應擴徑的錐面221側的管子4還會發生較大幅度的彎折,因而容易發生如表2所示的洩漏的情況。由於擴徑的錐面221、縮徑的錐面222和過渡段223的外表面各自對應的軸向長度及突出部22的軸向總長是一定的,內環2的軸向與擴徑的錐面221間的夾角θ1會隨著內環2的軸向與縮徑的錐面222間的夾角θ2的改變而相應變化,當內環2的軸向與縮徑的錐面222間的夾角θ2大於20°時,會導致內環2的軸向與擴徑的錐面221間的夾角θ1小於25,如前文所述,當內環2的軸向與擴徑的錐面221間的夾角θ1小於25°時,管子4的內壁與擴徑的錐面221間的接觸、擠壓作用力不夠,當用於高溫環境時,管子4受熱變軟,存在從內環2上滑出的可能,因而容易發生如表2所示的洩漏的情況。 When the angle θ2 between the axial direction of the inner ring 2 and the tapered surface 222 of the reduced diameter is less than 10°, the angle θ1 between the axial direction of the inner ring 2 and the tapered surface 221 of the enlarged diameter is also greater than 35°, and the inner wall of the pipe 4 It cannot be in close contact with or squeezed with the tapered surface 222 of the reduced diameter. When used in a high temperature environment, the tube 4 will be heated and softened, and there may be a possibility of slipping out. Because of the bending of the amplitude, the leakage as shown in Table 2 is prone to occur. Since the corresponding axial lengths of the enlarged tapered surface 221, the reduced tapered surface 222, and the outer surface of the transition section 223 and the total axial length of the protrusion 22 are constant, the axial direction of the inner ring 2 is the same as that of the enlarged tapered surface. The included angle θ1 between the surfaces 221 will change with the change of the included angle θ2 between the axial direction of the inner ring 2 and the reduced diameter tapered surface 222, when the included angle θ2 between the axial direction of the inner ring 2 and the reduced diameter tapered surface 222 When it is greater than 20°, the included angle θ1 between the axial direction of the inner ring 2 and the enlarged tapered surface 221 will be less than 25. As mentioned above, when the included angle θ1 between the axial direction of the inner ring 2 and the enlarged tapered surface 221 When it is less than 25°, the contact and squeezing force between the inner wall of the tube 4 and the enlarged tapered surface 221 is not enough. When used in a high temperature environment, the tube 4 will be heated and softened, and there is a possibility of slipping out of the inner ring 2 , So it is prone to leakage as shown in Table 2.

Figure 109116024-A0305-02-0014-3
Figure 109116024-A0305-02-0014-3
Figure 109116024-A0305-02-0015-4
Figure 109116024-A0305-02-0015-4

進一步地,如附圖5所示,插入部21的徑向厚度為D1,槽部13的徑向寬度為D2。驗證數據表3顯示,當插入部21的徑向厚度D1為槽部13的徑向寬度D2的1.2-1.5倍時,插入部21能夠比較容易的插入槽部13,且能夠被牢固地卡在槽部13內。當D1/D2的值小於1.2時,雖然插入21能夠比較順暢地插入槽部13,但是插入部21在槽部13中卡得不夠牢固,存在滑出的風險,因而容易發生如表2所示的密封失效的情況。而當D1/D2的值大於1.5時,插入部21難以插入槽部13。 Further, as shown in FIG. 5, the radial thickness of the insertion portion 21 is D1, and the radial width of the groove 13 is D2. The verification data table 3 shows that when the radial thickness D1 of the insertion part 21 is 1.2-1.5 times the radial width D2 of the groove part 13, the insertion part 21 can be inserted into the groove part 13 relatively easily, and can be firmly stuck in槽部13内。 In the groove 13. When the value of D1/D2 is less than 1.2, although the insert 21 can be inserted into the groove 13 relatively smoothly, the insert 21 is not firmly stuck in the groove 13, and there is a risk of slipping out, which is easy to occur as shown in Table 2. The case of seal failure. When the value of D1/D2 is greater than 1.5, it is difficult for the insertion portion 21 to be inserted into the groove portion 13.

Figure 109116024-A0305-02-0015-6
Figure 109116024-A0305-02-0015-6
Figure 109116024-A0305-02-0016-7
Figure 109116024-A0305-02-0016-7

進一步地,從嵌合部20向插入部21的末端延伸的方向,插入部21的徑向厚度逐漸減小,即插入部21為前端尖細的形狀。前端尖細的插入部21更容易插入槽部13,內環2的安裝更容易。 Further, in the direction extending from the fitting portion 20 to the distal end of the insertion portion 21, the radial thickness of the insertion portion 21 gradually decreases, that is, the insertion portion 21 has a tapered shape. The insertion part 21 with a tapered tip is easier to insert into the groove part 13, and the installation of the inner ring 2 is easier.

如附圖3所示,過渡段223的外徑最大的點與流體通道24的外表面間的徑向距離L1為連結部23的外表面與流體通道24的外表面間的徑向距離L2的1.5~2.5倍。該參數的實際作用的結果是使突出部22的最厚處突出連結部23的外表面一定的高度,從而使得管子4能夠緊緊地卡在外筒部11和突出部22及連結部23之間。當L1/L2的比值小於1.5時,管子4未能被外筒部11和突出部22緊緊卡住,當處於高溫環境中,管子4由於受熱變軟而從內環2上滑出,出現如表4所示的密封失效的問題。當L1/L2的比值大於2.5時,滿足管子4被牢固地卡在外筒部11和突出22之間,但是,管接頭與管子4安裝完成後,由於螺帽3的緊固作用力,外筒部11對突出部22的擠壓作用力過大,出現突出部22向流體通道24內側變形和導致流體通道24變小的問題,不利於流體的流動。 As shown in FIG. 3, the radial distance L1 between the point of the largest outer diameter of the transition section 223 and the outer surface of the fluid passage 24 is the radial distance L2 between the outer surface of the connecting portion 23 and the outer surface of the fluid passage 24 1.5~2.5 times. The actual effect of this parameter results in that the thickest part of the protrusion 22 protrudes from the outer surface of the connecting part 23 to a certain height, so that the tube 4 can be tightly clamped between the outer cylinder part 11, the protrusion 22 and the connecting part 23 . When the ratio of L1/L2 is less than 1.5, the tube 4 fails to be tightly clamped by the outer cylinder portion 11 and the protrusion 22. When in a high temperature environment, the tube 4 slips out of the inner ring 2 due to heat and softens. The problem of seal failure is shown in Table 4. When the ratio of L1/L2 is greater than 2.5, it is satisfied that the pipe 4 is firmly clamped between the outer cylinder portion 11 and the protrusion 22. However, after the pipe joint and the pipe 4 are installed, due to the tightening force of the nut 3, the outer cylinder The pressing force of the portion 11 on the protrusion 22 is too large, and the protrusion 22 deforms to the inner side of the fluid channel 24 and causes the fluid channel 24 to become smaller, which is not conducive to the flow of fluid.

Figure 109116024-A0305-02-0016-8
Figure 109116024-A0305-02-0016-8
Figure 109116024-A0305-02-0017-9
Figure 109116024-A0305-02-0017-9

如附圖3所示,過渡段223的外徑最大的點與流體通道24的外表面間的徑向距離L1為嵌合部20的外表面與流體通道24的外表面間的徑向距離L3的1.05~1.2倍。當L1/L3的值為1.05~1.2,嵌合部20的外周與外筒部11的內壁緊密接觸,突出部22的最厚處對應的過渡段223和外筒部11將管子4緊緊地卡住,即使處於高溫環境中,管子4也不會從管接頭滑出。當L1/L3的比值小於1.05時,管子4未能被外筒部11和突出部22緊緊卡住,高溫環境中,管子4由於受熱變軟而從內環2上滑出,出現如表5所示的密封失效的問題。當L1/L3的比值大於1.2時,外筒部11和突出部22的最厚處對應的過渡段223能夠緊緊地卡住管子4,但是,管接頭與管子4安裝完成後,由於螺帽3的緊固作用力,外筒部11對突出部22的擠壓作用力過大,出現突出部22向流體通道24內側變形和導致流體通道24變小的問題,不利於流體的流動。 As shown in FIG. 3, the radial distance L1 between the point with the largest outer diameter of the transition section 223 and the outer surface of the fluid passage 24 is the radial distance L3 between the outer surface of the fitting portion 20 and the outer surface of the fluid passage 24 1.05~1.2 times of that. When the value of L1/L3 is 1.05~1.2, the outer circumference of the fitting portion 20 is in close contact with the inner wall of the outer tube portion 11, and the thickest part of the protrusion 22 corresponds to the transition section 223 and the outer tube portion 11 to tightly tighten the tube 4 The ground is stuck, even in a high temperature environment, the pipe 4 will not slip out of the pipe joint. When the ratio of L1/L3 is less than 1.05, the tube 4 fails to be tightly clamped by the outer cylinder portion 11 and the protrusion 22. In a high temperature environment, the tube 4 slips out of the inner ring 2 due to heat and softens, as shown in the table 5 shows the problem of seal failure. When the ratio of L1/L3 is greater than 1.2, the transition section 223 corresponding to the thickest part of the outer cylinder portion 11 and the protrusion 22 can clamp the pipe 4 tightly. However, after the pipe joint and the pipe 4 are installed, due to the nut The tightening force of 3, the extrusion force of the outer cylinder portion 11 on the protrusion 22 is too large, and the protrusion 22 deforms to the inner side of the fluid channel 24 and causes the fluid channel 24 to become smaller, which is not conducive to the flow of fluid.

表5 L1/L3的相應比值對應的管接頭的密封性測試結果

Figure 109116024-A0305-02-0018-10
Table 5 Tightness test results of pipe joints corresponding to the corresponding ratio of L1/L3
Figure 109116024-A0305-02-0018-10

實施例二 Example two

如附圖6所示,另一種結構的內環2,突出部22的過渡段223的外表面為球面,即擴徑的錐面221與縮徑的錐面222間通過該球面過渡相連。連接處為光滑連接,球面與管子4的內壁接觸更緊密,密封效果更好,且管子4的形變是漸變的,可減小管子4的彎折曲率,減輕對管子4的損傷。 As shown in FIG. 6, in the inner ring 2 of another structure, the outer surface of the transition section 223 of the protrusion 22 is a spherical surface, that is, the expanded tapered surface 221 and the reduced diameter tapered surface 222 are connected by the spherical surface transition. The connection is smooth, the spherical surface is in closer contact with the inner wall of the tube 4, and the sealing effect is better. The deformation of the tube 4 is gradual, which can reduce the bending curvature of the tube 4 and reduce the damage to the tube 4.

球面上任一點的切線與內環2的軸向間的夾角θ3為0°~35°,球面與擴徑的錐面221和縮徑的錐面222在交點處相切連接。在與擴徑的錐面221的交點處,球面的切線與內環的的軸向間的夾角θ3為35°,在與縮徑的錐面222的交點處,球面的切線與內環的軸向間的夾角θ3為20°,在球面的外徑最大處的點處,球面的切線與內環的軸向間的夾角θ3為0°。 The included angle θ3 between the tangent line of any point on the spherical surface and the axial direction of the inner ring 2 is 0°~35°, and the spherical surface is tangentially connected with the enlarged diameter tapered surface 221 and the reduced diameter tapered surface 222 at the intersection. At the intersection with the enlarged tapered surface 221, the angle θ3 between the tangent of the spherical surface and the axial direction of the inner ring is 35°. At the intersection with the reduced tapered surface 222, the tangent of the spherical surface is The angle θ3 between the two directions is 20°. At the point where the outer diameter of the spherical surface is the largest, the angle θ3 between the tangent of the spherical surface and the axial direction of the inner ring is 0°.

內環2的軸向與擴徑的錐面221間的夾角θ1大於其與縮徑的錐面222間的夾角θ2,使得處於末端的擴徑的錐面221形成管子4沿著縮徑的錐面222 向外滑出的阻礙,可防止管子4沿縮徑的錐面222和過渡段223滑出。當管接頭和管子4用於高溫環境下,管子4受熱變軟後,管子4可能會沿著縮徑的錐面222滑動一定的距離,但是由於末端的擴徑的錐面221與內環2的軸向間的夾角θ1大於縮徑的錐面222與內環2的軸向間的夾角θ2,那麼擴徑的錐面221可阻止管子4的滑出,進而確保了高溫環境下管接頭和管子4間的可靠密封性。而將夾角θ1設在25~35°,夾角θ2設在10~20°,確保在高溫環境下,管子4不會沿著縮徑的錐面222向外滑出和可靠密封性的前提下,儘量減小管子4的彎折曲率,使管子4的彎折曲率始終落在其可承受的範圍內,減小對管子4的損傷,延長管子4的使用壽命。 The included angle θ1 between the axial direction of the inner ring 2 and the enlarged diameter tapered surface 221 is greater than the included angle θ2 between the inner ring 2 and the reduced diameter tapered surface 222, so that the enlarged diameter tapered surface 221 at the end forms a cone along the reduced diameter of the pipe 4 Face 222 The obstacle of sliding out can prevent the tube 4 from sliding out along the tapered surface 222 and the transition section 223 of the reduced diameter. When the pipe joint and the pipe 4 are used in a high temperature environment, after the pipe 4 is heated and softened, the pipe 4 may slide a certain distance along the tapered surface 222 of reduced diameter, but due to the end of the tapered surface 221 and the inner ring 2 The included axial angle θ1 is greater than the included angle θ2 between the reduced diameter tapered surface 222 and the axial direction of the inner ring 2, so the enlarged diameter tapered surface 221 can prevent the pipe 4 from sliding out, thereby ensuring the pipe joint and Reliable airtightness between the pipes 4. The included angle θ1 is set at 25~35°, and the included angle θ2 is set at 10-20° to ensure that the pipe 4 will not slide out along the tapered surface 222 of the reduced diameter under the premise of reliable sealing performance in a high temperature environment. Minimize the bending curvature of the tube 4 so that the bending curvature of the tube 4 always falls within its acceptable range, reducing damage to the tube 4 and prolonging the service life of the tube 4.

過渡段223的外徑最大的點與流體通道24的外表面間的徑向距離L1為連結部23的外表面與流體通道24的外表面間的徑向距離L2的1.5~2.5倍。 The radial distance L1 between the point with the largest outer diameter of the transition section 223 and the outer surface of the fluid channel 24 is 1.5 to 2.5 times the radial distance L2 between the outer surface of the connecting portion 23 and the outer surface of the fluid channel 24.

進一步地,過渡段223的外徑最大的點與流體通道24的外表面間的徑向距離L1為嵌合部20的外表面與流體通道24的外表面間的徑向距離L3的1.05~1.2倍。 Further, the radial distance L1 between the point with the largest outer diameter of the transition section 223 and the outer surface of the fluid passage 24 is 1.05~1.2 of the radial distance L3 between the outer surface of the fitting portion 20 and the outer surface of the fluid passage 24 Times.

當突出部22的過渡段223的外徑最大的點與流體通道24的外表面間的徑向距離L1為連結部23的外表面與流體通道24的外表面間的徑向距離L2的1.5~2.5倍時,及當過渡段223的外徑最大的點與流體通道24的外表面間的徑向距離L1為嵌合部20的外表面與流體通道24的外表面間的徑向距離L3的1.05~1.2倍時,則能夠將管子4牢固地卡在內環2和外筒部11之間,增大了內環2和外筒部11對管子4的緊固作用力,防止管子4滑出。 When the radial distance L1 between the point with the largest outer diameter of the transition section 223 of the protrusion 22 and the outer surface of the fluid passage 24 is 1.5 to the radial distance L2 between the outer surface of the connecting portion 23 and the outer surface of the fluid passage 24 2.5 times, and when the radial distance L1 between the point with the largest outer diameter of the transition section 223 and the outer surface of the fluid passage 24 is the radial distance L3 between the outer surface of the fitting portion 20 and the outer surface of the fluid passage 24 1.05~1.2 times, the tube 4 can be firmly clamped between the inner ring 2 and the outer tube 11, which increases the fastening force of the inner ring 2 and the outer tube 11 on the tube 4 and prevents the tube 4 from slipping. out.

以上已詳細描述了本發明的較佳實施例,但應理解,在閱讀了本發明的上述講授內容之後,本發明所屬技術領域中具有通常知識者可以對本 發明作各種改動或修改。這些均等形式同樣落於本申請所附申請專利範圍所限定的範圍。 The preferred embodiments of the present invention have been described in detail above, but it should be understood that after reading the above teaching content of the present invention, those with ordinary knowledge in the technical field to which the present invention belongs can Various changes or modifications were made to the invention. These equal forms also fall within the scope defined by the scope of the patent application attached to this application.

2:內環 2: inner ring

20:嵌合部 20: Fitting part

21:插入部 21: Insertion part

22:突出部 22: protrusion

221:擴徑的錐面 221: Expanded cone

222:縮徑的錐面 222: reduced cone

223:過渡段 223: Transition section

23:連結部 23: Connection

24:流體通道 24: fluid channel

25:抵接部 25: Buttress

L1:徑向距離 L1: Radial distance

L2:徑向距離 L2: Radial distance

L3:徑向距離 L3: Radial distance

W1:軸向長度 W1: axial length

W2:軸向長度 W2: axial length

θ1:夾角 θ1: included angle

θ2:夾角 θ2: included angle

Claims (9)

一種與管子連接的管接頭,包括:接頭主體,其具有同軸設置主體筒部、外筒部和內筒部,所述的外筒部和內筒部由主體筒部向同一方向突出的設置,所述的內筒部設置於外筒部的內側,所述的外筒部的突出於主體筒部的長度大於內筒部的突出於主體筒部的長度,由所述的主體筒部、外筒部和內筒部包圍形成一槽部,所述的槽部的開口方向與外筒部和內筒部的突出方向相同;內環,其具有依次同軸設置的筒狀的插入部、筒狀的嵌合部、筒狀的連結部和突出部及位於中心的流體通道,所述的嵌合部以可拆卸的方式嵌合於外筒部的徑向內側,所述的插入部從嵌合部的一側突出的設置,並由所述的接頭主體的槽部的開口插入該槽部,所述的連結部和突出部從嵌合部的另一側突出設置,所述的突出部的外表面包括擴徑的錐面和縮徑的錐面,所述的擴徑的錐面位於突出部的最末端,所述的縮徑的錐面位於連結部和擴徑的錐面之間,所述的突出部和連結部壓入管子一端的內部,並將管子夾在其與所述的外筒部之間,該內環能夠在與管子連結的狀態下與接頭主體連接或脫離;螺帽,其通過內螺紋緊固於所述的接頭主體的外筒部,並與所述的內環一起將管子緊固於所述的接頭主體;其特徵在於:所述的擴徑的錐面和縮徑的錐面之間設有過渡段,所述的過渡段的軸向長度為突出部的軸向長度的15%~30%,所述的過渡段的外表面上任一點的切線與內環的軸向的夾角為0°~35°,所述的內環的軸向與擴徑的錐面間的夾角大於其與縮徑的錐面間的夾角; 所述的內環的軸向與擴徑的錐面間的夾角為25°~35°,所述的內環的軸向與縮徑的錐面間的夾角為10°~20°。 A pipe joint connected with a pipe includes a joint main body with a main body cylinder part, an outer cylinder part and an inner cylinder part arranged coaxially, and the outer cylinder part and the inner cylinder part are arranged protruding in the same direction from the main body cylinder part, The inner tube part is arranged inside the outer tube part, and the length of the outer tube part protruding from the main body tube part is greater than the length of the inner tube part protruding from the main body tube part. The cylindrical portion and the inner cylindrical portion are surrounded to form a groove, and the opening direction of the groove is the same as the protruding direction of the outer cylindrical portion and the inner cylindrical portion; The fitting part, the cylindrical connecting part and the protruding part and the fluid channel located in the center, the fitting part is detachably fitted into the radial inner side of the outer cylinder part, and the insertion part is inserted from the fitting One side of the part protruding, and the groove part is inserted into the groove part through the opening of the groove part of the joint body, the connecting part and the protruding part protruding from the other side of the fitting part, the protruding part The outer surface includes an enlarged tapered surface and a reduced tapered surface, the enlarged tapered surface is located at the end of the protrusion, and the reduced tapered surface is located between the connecting portion and the enlarged tapered surface, The protruding part and the connecting part are pressed into the inside of one end of the tube, and the tube is clamped between the tube and the outer cylinder part, and the inner ring can be connected to or disconnected from the joint body in the state of being connected to the tube; Cap, which is fastened to the outer cylinder part of the joint body by internal threads, and together with the inner ring to fasten the pipe to the joint body; characterized in that: the enlarged tapered surface A transition section is provided between the tapered surface and the tapered surface. The axial length of the transition section is 15% to 30% of the axial length of the protrusion. The tangent to any point on the outer surface of the transition section and the inner The included angle between the axial direction of the ring is 0°~35°, and the included angle between the axial direction of the inner ring and the tapered surface of the enlarged diameter is greater than the included angle between the axial direction of the inner ring and the tapered surface of the reduced diameter; The included angle between the axial direction of the inner ring and the tapered surface of the enlarged diameter is 25°-35°, and the included angle between the axial direction of the inner ring and the tapered surface of the reduced diameter is 10°-20°. 如請求項1所述的一種與管子連接的管接頭,其中所述的過渡段的外表面為等徑的圓柱面且與內環的軸向平行,且所述的過渡段具有一定軸向長度。 A pipe joint connected to a pipe according to claim 1, wherein the outer surface of the transition section is a cylindrical surface of equal diameter and is parallel to the axial direction of the inner ring, and the transition section has a certain axial length . 如請求項1所述的一種與管子連接的管接頭,其中所述過渡段的外表面為球面。 The pipe joint connected with the pipe according to claim 1, wherein the outer surface of the transition section is a spherical surface. 如請求項2或3所述的一種與管子連接的管接頭,其中所述的過渡段的外徑最大的點與流體通道的外表面間的徑向距離為所述的連結部的外表面與流體通道的外表面間的徑向距離的1.5~2.5倍。 A pipe joint connected to a pipe as described in claim 2 or 3, wherein the radial distance between the point with the largest outer diameter of the transition section and the outer surface of the fluid channel is the outer surface of the connecting portion and the outer surface of the fluid channel. The radial distance between the outer surfaces of the fluid channels is 1.5 to 2.5 times. 如請求項2或3所述的一種與管子連接的管接頭,其中所述的過渡段的外徑最大的點與流體通道的外表面間的徑向距離為所述的嵌合部的外表面與流體通道的外表面間的徑向距離的1.05~1.2倍。 A pipe joint connected to a pipe according to claim 2 or 3, wherein the radial distance between the point with the largest outer diameter of the transition section and the outer surface of the fluid channel is the outer surface of the fitting portion The radial distance from the outer surface of the fluid channel is 1.05~1.2 times. 如請求項1所述的一種與管子連接的管接頭,其中所述的內環還包括筒狀的抵接部,所述的抵接部與插入部同軸設置、並位於所述的插入部的同一側的徑向內部,所述的內環安裝完成後,所述的抵接部接觸、抵接所述的接頭主體的內筒部。 According to claim 1, a pipe joint connected to a pipe, wherein the inner ring further includes a cylindrical abutting portion, and the abutting portion is arranged coaxially with the insertion portion and is located at the end of the insertion portion. In the radial inner part of the same side, after the inner ring is installed, the abutting portion contacts and abuts the inner cylinder portion of the joint body. 如請求項1所述的一種與管子連接的管接頭,其中所述的螺帽包括螺合部和按壓部,所述的螺合部與外筒部外周的螺紋螺合,所述的按壓部將管子和內環向主體筒部的方向按壓,將所述的插入部壓入槽部,從而將所述的內環和管子緊固於接頭主體。 According to claim 1, a pipe joint connected to a pipe, wherein the nut includes a screwed portion and a pressing portion, the screwed portion is screwed with the thread on the outer circumference of the outer cylinder, and the pressing portion The tube and the inner ring are pressed in the direction of the main body cylinder, and the insertion part is pressed into the groove part, so that the inner ring and the tube are fastened to the joint body. 如請求項1所述的一種與管子連接的管接頭,其中所述的插入部的徑向厚度等於或稍大於槽部的徑向寬度,或者所述的插入部的徑向厚度為槽部的徑向寬度的1.2-1.5倍。 A pipe joint connected to a pipe according to claim 1, wherein the radial thickness of the insertion part is equal to or slightly larger than the radial width of the groove part, or the radial thickness of the insertion part is the same as that of the groove part. 1.2-1.5 times the radial width. 如請求項1所述的一種與管子連接的管接頭,其中從所述的嵌合部向插入部的末端延伸的方向,所述的插入部的徑向厚度逐漸減小,即所述的插入部為前端尖細的形狀。 A pipe joint connected to a pipe according to claim 1, wherein the radial thickness of the insertion portion gradually decreases in the direction extending from the insertion portion to the end of the insertion portion, that is, the insertion portion The tip is tapered.
TW109116024A 2019-05-17 2020-05-14 A pipe joint connected with a pipe TWI734475B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910412758.9A CN110043722A (en) 2019-05-17 2019-05-17 A kind of pipe fitting being connect with pipe
CN201910412758.9 2019-05-17

Publications (2)

Publication Number Publication Date
TW202043660A TW202043660A (en) 2020-12-01
TWI734475B true TWI734475B (en) 2021-07-21

Family

ID=67282468

Family Applications (1)

Application Number Title Priority Date Filing Date
TW109116024A TWI734475B (en) 2019-05-17 2020-05-14 A pipe joint connected with a pipe

Country Status (3)

Country Link
CN (1) CN110043722A (en)
TW (1) TWI734475B (en)
WO (1) WO2020233335A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110043722A (en) * 2019-05-17 2019-07-23 杭州科百特过滤器材有限公司 A kind of pipe fitting being connect with pipe
CN210318899U (en) * 2019-05-17 2020-04-14 杭州科百特过滤器材有限公司 Sealed conduit joint
CN113606400A (en) * 2021-07-15 2021-11-05 杭州泷泽过滤器材有限公司 Pipe joint for connecting with pipe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005344795A (en) * 2004-06-02 2005-12-15 Nippon Pillar Packing Co Ltd Inner ring for pipe joint, pipe joint and connecting method of pipe joint
CN105164456A (en) * 2013-05-08 2015-12-16 日本皮拉工业株式会社 Pipe joint consisting of synthetic resin
CN105209810A (en) * 2013-05-08 2015-12-30 日本皮拉工业株式会社 Pipe connecting device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4701271B2 (en) * 2008-07-17 2011-06-15 日本ピラー工業株式会社 Inner ring for pipe joint, pipe joint, inner ring manufacturing method
CN210003962U (en) * 2019-05-17 2020-01-31 杭州科百特过滤器材有限公司 A pipe joint for connecting pipes
CN110043722A (en) * 2019-05-17 2019-07-23 杭州科百特过滤器材有限公司 A kind of pipe fitting being connect with pipe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005344795A (en) * 2004-06-02 2005-12-15 Nippon Pillar Packing Co Ltd Inner ring for pipe joint, pipe joint and connecting method of pipe joint
CN105164456A (en) * 2013-05-08 2015-12-16 日本皮拉工业株式会社 Pipe joint consisting of synthetic resin
CN105209810A (en) * 2013-05-08 2015-12-30 日本皮拉工业株式会社 Pipe connecting device

Also Published As

Publication number Publication date
CN110043722A (en) 2019-07-23
TW202043660A (en) 2020-12-01
WO2020233335A1 (en) 2020-11-26

Similar Documents

Publication Publication Date Title
TWI734475B (en) A pipe joint connected with a pipe
EP3001086B1 (en) Pipe connecting device
EP2995839B1 (en) Pipe connecting device
EP2995840B1 (en) Pipe connecting device
US20090105692A1 (en) Male luer lock connector
KR20020092172A (en) A method and apparatus for preventing separation of tube from a resin joint of pipes
TW201447156A (en) Inner ring
CN106322008A (en) Pipe fitting
US6601879B2 (en) Plastic fitting for flared tubing
US6513839B2 (en) Pipe joint made of resin
US6991266B2 (en) Pipe joint made of resin
US6517123B2 (en) Pipe joint made of resin
CN210003962U (en) A pipe joint for connecting pipes
CN210003963U (en) kinds of pipe joint connected with pipe
US7588253B2 (en) Sealing system with sealing ring
US20030197378A1 (en) Sealing compression ferrule for plumbing connection fitting
CN211010248U (en) Pipe joint connected with pipe
JP2524753Y2 (en) Resin pipe fittings for high-purity fluid transport piping
CN208311740U (en) A kind of hose coupling
JPH10196867A (en) Tube coupling
TWM595182U (en) Pipe joint device
KR200235241Y1 (en) Pipe Joint Body
CN111219554A (en) Pipe joint
WO2019056151A1 (en) Sleeve-type fluid divider
KR200231615Y1 (en) pipe joint