Seamless stainless steel pipe

Abstract

The invention relates to a seamless stainless steel pipe which is provided with a pipe body. A connecting insertion pipe integrally formed with the pipe body is arranged at one end of the pipe body, a connecting pipe barrel capable of being matched with the connecting insertion pipe on the adjacent pipe body is arranged at the other end of the pipe body, the connecting insertion pipe and the connecting pipe barrel are both coaxial with the pipe body and communicated with the pipe body, and a sealing assembly capable of conducting sealing when the adjacent pipe bodies are connected is arranged on the connecting insertion pipe. The sealing assembly comprises a plurality of sealing connecting gaskets and a sealing connecting bottom ring which is fixedly arranged on the connecting insertion pipe in a sleeving mode and abuts against the end face of the pipe body in a pressing mode, and the sealing connecting gaskets and the sealing connecting bottom ring are plastic parts. And after the connecting insertion pipe is inserted into the connecting pipe barrel on the connecting pipe body, the sealing connection is performed through the matching of the end surface of the pressing groove and the sealing connection gaskets, the matching among the sealing connection gaskets and the matching between the sealing connection gaskets and the sealing connection bottom ring, and the connecting insertion pipe and the connecting pipe barrel are fixed through the locking piece. The device is ingenious in structure, convenient and practical.

Description

Technical Field

[0001] The invention relates to the field of stainless steel pipes, in particular to a seamless stainless steel pipe. Background Art

[0002] Seamless stainless steel pipe is an economical and practical pipe with many excellent properties, so it is widely used in many industries. Seamless stainless steel pipe has corrosion resistance, high temperature resistance, high strength and pressure resistance, good processing performance, economy and practicality.

[0003] In the prior art, steel pipes are installed and connected by welding or pipe joints and flanges. The installation efficiency is low, and the sealing performance of the connection after installation cannot be guaranteed. The connection is prone to fall off, the safety performance is not high, and leakage is prone to occur. Summary of the invention

[0004] The purpose of the present invention is to provide a seamless stainless steel pipe with an ingenious structure, which can achieve the firmness and sealing of the connection of the seamless stainless steel pipes, ensure the connection strength between the seamless stainless steel pipes, and is convenient and practical.

[0005] The technical solution to achieve the purpose of the present invention is as follows: the present invention comprises a tube body; one end of the tube body is provided with a connecting plug integrally formed with the tube body, and the other end of the tube body is provided with a connecting tube barrel which can be matched with the connecting plug barrel on the adjacent tube body, the connecting plug barrel and the connecting tube barrel are both coaxial with the tube body and are connected and arranged, the connecting plug barrel is provided with a sealing component which can be sealed when the adjacent tube bodies are connected, the sealing component comprises a plurality of sealing connection gaskets sleeved on the connecting plug barrel, and a sealing connection bottom ring fixedly sleeved on the connecting plug barrel and pressed against the end surface of the tube body, the sealing connection gasket and the sealing connection bottom ring are both plastic parts, the connecting tube barrel is provided with a pressing groove into which each sealing connection gasket can extend, and a pressing groove into which the connecting gasket can extend. A slot for inserting the connecting pipe, the length of the slot is greater than the length of the connecting pipe, the sealing connection gasket includes a first gasket body sleeved on the connecting pipe, a first convex ring portion integrally formed with the first gasket body and arranged on the left end surface of the first gasket body, and a first clamping convex ring arranged on the left end surface of the first convex ring portion, a first sealing groove for the first convex ring portion to be inserted is provided on the right end surface of the first gasket body, the width of the first convex ring portion is greater than the width of the first sealing groove, a first clamping groove adapted to the first clamping convex ring is provided in the first sealing groove, a second convex ring portion which can extend into the first sealing groove on the adjacent first gasket body is provided on the sealing connection bottom ring, and a first convex ring portion is provided on the second convex ring portion The cam is secured to the inner wall of the press groove and is provided with a second sealing groove into which the first convex ring portion on the adjacent first gasket body can be inserted; the second sealing groove is provided with a second sealing groove which is secured to the first clamping convex ring on the adjacent first convex ring portion; a follower ring portion is provided on the outer wall of each first gasket body; each follower ring portion drives each sealing connection gasket to move toward the sealing connection bottom ring through the plug-in cooperation between the connecting insert and the connecting tube and the friction cooperation with the inner wall of the press groove; after the connecting insert is plugged into the connecting insert on the adjacent tube body, the sealing connection bottom ring is plugged into the first sealing groove through the plug-in cooperation between the second convex ring portion and the first clamping The slot is plug-fitted and sealed with an adjacent sealing connection gasket, and the adjacent sealing connection gaskets are sealed with the adjacent sealing connection gaskets through the plug-fitting of the first convex ring portion and the first sealing groove, and the plug-fitting of the first clamping convex ring and the first clamping groove. The sealing connection gasket adjacent to the end face of the pressing groove is sealed with the end face of the pressing groove through the plug-fitting of the first convex ring portion and the second sealing groove, and the plug-fitting of the first clamping convex ring and the second clamping groove. After the connecting insert is plugged in with the connecting tube on the connected tube body, it is sealed and connected through the cooperation between the end face of the pressing groove and the sealing connection gasket, the cooperation between each sealing connection gasket, and the cooperation between the sealing connection gasket and the sealing connection bottom ring, and is fixed by a locking piece.

[0006] Furthermore, the cross-sections of the first clamping convex ring and the second clamping convex ring are circular, and the cross-sections of the first clamping groove and the second clamping groove are both elliptical. The first clamping convex ring on the sealing connection gasket adjacent to the end face of the pressing groove is squeezed into the second clamping groove through the plug-in fit of the connecting insert and the connecting tube and forms a line contact with the second clamping groove. The first clamping convex ring is fitted with the inner wall of the second clamping groove through the continuous extrusion of the sealing connection gasket by the end face of the pressing groove, and forms a surface contact. The first clamping protrusion on the adjacent sealing connection gasket is pressed into the corresponding first clamping groove through the plug-in fit of the connecting insert and the connecting tube and forms a line contact with the first clamping groove. The first clamping protrusion is fitted with the inner wall of the first clamping groove through the continuous extrusion of the adjacent sealing connection gasket and forms a surface contact. The second clamping convex ring is squeezed into the first clamping groove of the adjacent sealing connection gasket through the plug-in cooperation between the connecting insert and the connecting tube and forms a line contact with the first clamping groove. The second clamping convex ring is fitted with the inner wall of the first clamping groove and forms a surface contact through the continuous squeezing of the sealing connection gasket on the sealing connection bottom ring.

[0007] Furthermore, a plurality of side convex rings are provided on the inner and outer walls of the second convex ring portion and each first convex ring portion, and side adjustment grooves adapted to each side convex ring are provided on the inner walls of the first sealing groove and the second sealing groove, and the groove width of each side adjustment groove is greater than the ring width of the side convex ring, and each side convex ring is slidably arranged in the corresponding side adjustment groove, and is pressed against the side wall of the side adjustment groove by continuous pressure between the sealing connection gasket and the sealing connection bottom ring, or continuous pressure between the sealing connection gaskets, or continuous pressure of the end face of the pressure groove against the sealing connection gasket.

[0008] Furthermore, the cross-section of the above-mentioned follower ring part is hook-shaped, one end of each follower ring part is fixedly connected to the outer wall of the first gasket body, and one end of each follower ring part away from the first gasket body is deflected toward the sealing connection bottom ring.

[0009] Furthermore, the tube body is provided with relatively arranged locking grooves, one end of each locking groove is arranged on the outer wall of the tube body, and the other end of each locking groove extends to the end face of the tube body along the axial direction of the tube body, and each locking groove is provided with a self-locking component which can automatically lock the connected connecting pipe and the connecting tube after insertion.

[0010] Furthermore, the self-locking assembly includes a self-locking slider slidably arranged in the locking groove, a self-locking rod fixed on the self-locking slider, and a locking tongue lifted and arranged on the self-locking rod. Side sliding grooves arranged parallel to the extension direction of the locking groove are provided on both side walls of the locking groove. Side sliding grooves are slidably arranged in each side sliding groove. Compression springs are provided in each side sliding groove. The two ends of each compression spring act on the side sliding groove and the side sliding groove respectively. Each side sliding groove moves in a direction away from the connecting plug under the continuous action of the corresponding compression spring. Each side sliding groove is fixed on both sides of the self-locking slider. The locking tongue is arranged on the self-locking rod away from One end of the self-locking slider is provided with a lifting slot on the self-locking rod, and a first return spring is provided in the lifting slot, and two ends of the first return spring are respectively fixed to the bottom of the lifting slot and the bottom of the lock tongue, and the end surface of the connecting tube is provided with a self-locking slot corresponding to each self-locking rod, and each self-locking slot is provided with a lock hole adapted to the lock tongue, and the lock tongue is extended into the lock hole by the continuous force of the first return spring after the self-locking rod is extended into the self-locking slot, and the self-locking rod on the self-locking slider drives the end surface of the tube body to be pressed against the end surface of the adjacent connecting tube by the continuous force of the compression spring on the side slider and the pressure of the lock tongue on the lock hole.

[0011] Furthermore, the lock tongue is provided with a guiding inclined surface and a pressing surface which can press against the inner wall of the lock hole.

[0012] Furthermore, first limit slide blocks are provided on both sides of the above-mentioned lock tongue, and first limit slide grooves adapted to each first limit slide block are provided on both sides of the lifting slide groove. The lock tongue is set in the lifting slide groove through the matching limit sliding of each first limit slide block and the corresponding first limit slide groove.

[0013] Furthermore, one end of the above-mentioned lock hole is connected to the self-locking slide groove, and the other end of the lock hole extends to the side wall of the tube body, and an unlocking block is slidably provided in the lock hole, and one end of the unlocking block extends out of the lock hole, and second limiting slide grooves are provided on both sides of the lock hole, and second limiting sliding blocks adapted to each second limiting slide groove are provided on both sides of the unlocking block, and each second limiting slide groove is provided with a second return spring, and both ends of each second return spring are respectively fixed to the bottom of the second limiting sliding block and the bottom of the second limiting slide groove, and the unlocking block applies pressure to the lock tongue after sliding and resets it through the continuous force of the second return spring after the lock tongue is separated from the lock hole.

[0014] Furthermore, a push rod is provided on the self-locking slider.

[0015] The present invention has positive effects: (1) The present invention forms a multi-layer seal by arranging a sealing assembly between the connecting plug and the connecting tube and arranging multiple sealing connection gaskets and sealing connection bottom rings, thereby ensuring the sealing of the connection between the various tube bodies, setting the length of the slot to be greater than the length of the connecting plug, thereby ensuring that the end face of the pressing groove can completely press the various sealing connection gaskets and the sealing connection bottom ring against the end face of the tube body, and by setting the width of the first convex ring portion to be greater than the width of the first sealing groove, the width of the first convex ring portion is greater than the width of the second sealing groove, and the width of the second convex ring portion is greater than the width of the first sealing groove, thereby ensuring that the sealing connection gasket and the end face of the pressing groove, between the various sealing connection gaskets, and between the sealing connection gasket and the sealing connection bottom ring can be tightly and firmly connected together, further ensuring the sealing of the connection. After the locking member is fixed, the sealing and firmness of the connection between the various tube bodies are guaranteed, effectively solving the problem that the connection between the tube bodies is easy to loosen and cannot ensure the sealing in the prior art, and effectively ensuring the tightness and sealing of the tube body connection through multi-layer sealing, with a clever structure, stable and convenient.

[0016] (2) In the present invention, the cross-sections of the first clamping protrusion and the second clamping protrusion are set to be circular, and the cross-sections of the first clamping groove and the second clamping groove are set to be elliptical. During the pressing process, the first clamping protrusion and the second clamping protrusion first come into contact with the first clamping groove or the second clamping groove, and then fit with the first clamping groove and the second clamping groove under continuous pressing, thereby forming surface contact, thereby ensuring the sealing of the connection between the pressing groove and the sealing connection gasket, between the sealing connection gaskets, and between the sealing connection gasket and the sealing connection bottom ring.

[0017] (3) The present invention provides side convex rings on the first convex ring portion and the second convex ring portion, and the width of the side adjustment groove is greater than the width of the side convex ring, so that the first clamping convex ring on the first convex ring portion and the second clamping convex ring on the second convex ring portion can have a margin for deformation. At the same time, after each follower ring portion is pressed against the inner wall of the pressure groove, the side convex ring is pressed against the groove bottom and side wall of the side adjustment groove, further ensuring the sealing of the connection between the pressure groove and the sealing connection gasket, between the sealing connection gaskets, and between the sealing connection gasket and the sealing connection bottom ring.

[0018] (4) The present invention ensures friction fit between the follower ring and the side wall of the pressure groove by setting the follower ring portion in a hook shape, thereby ensuring that each sealing connection gasket can move toward the sealing connection bottom ring driven by the inner wall of the pressure groove on the connecting tube, thereby ensuring that each sealing connection gasket and the sealing connection gasket and the sealing connection bottom ring can be tightly and firmly connected.

[0019] (5) The present invention provides a locking groove on the outer wall of the tube body and a self-locking component in the locking groove to stably and firmly connect the connected tube bodies. The cooperation of the side sliders and the side sliding grooves effectively ensures the orientation and stability of the self-locking sliders and the self-locking rods on the self-locking sliders during the sliding process. After the lock tongue is connected to the lock hole, the continuous force of the torsion spring can firmly and continuously press the lock tongue against the side wall of the lock hole, thereby tightly pressing the connected tube bodies. The driving of the lock tongue by the first return spring can effectively ensure the lock tongue is pressed against the lock hole, and can also facilitate the movement of the lock tongue when the lock tongue and the lock hole can be matched or when the lock tongue and the lock hole are separated, thereby ensuring the tight and firm connection between the tube bodies.

[0020] (6) The present invention provides a guiding inclined surface on the lock tongue, so as to guide the lock tongue to enter the self-locking groove just when the lock tongue enters the self-locking groove, thereby avoiding collision between the lock tongue and the end face of the connecting tube. Meanwhile, a pressing surface is provided, which can avoid separation of the lock tongue from the lock hole on the one hand, and ensure stable pressing between the lock tongue and the inner wall of the lock hole on the other hand, thereby further ensuring stable pressing between the tube bodies.

[0021] (7) The present invention provides a first limiting slider on both sides of the lock tongue and a first limiting slot on both sides of the lifting slot. Through the cooperation of the first limiting slider and the first limiting slot, on the one hand, the stability of the lifting of the lock tongue can be ensured, and on the other hand, the lifting of the lock tongue can be limited to avoid the lock tongue from being separated from the lifting slot. The present invention is safe and practical.

[0022] (8) The present invention arranges an unlocking block in the lock hole. The unlocking block ensures stability and limitation during the lifting and lowering process through the cooperation of the second limiting sliding block and the second limiting sliding groove. On the other hand, the unlocking block is reset after sliding by continuously applying force on the second reset spring, which effectively ensures the separation of the lock tongue from the lock hole. The present invention is convenient and practical.

[0023] (9) The present invention provides a push rod. When the lock tongue on the self-locking rod is connected to the lock hole, the operator can push the push rod and overcome the force of the compression spring to push the lock tongue into the lock hole, thereby ensuring the rapid connection between the lock tongue and the lock hole. The invention is practical and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein Figure 1 It is a cross-sectional view of the overall structure of the seamless stainless steel pipe in the present invention; Figure 2 for Figure 1 The enlarged view of point A in the middle; Figure 3 for Figure 1 The enlarged view of point B in the middle; Figure 4 A cross-sectional view of the overall structure of the sealing connection gasket in the present invention; Figure 5 for Figure 4 Enlarged view of point C in the middle; Figure 6 It is a cross-sectional view of the overall structure of the sealing connection bottom ring in the present invention; Figure 7 It is a cross-sectional view of the connection structure of adjacent pipe bodies in the present invention; Figure 8 for Figure 7 The enlarged view of point D in the middle; Fig. 9 It is a schematic diagram of the overall structure of the lock tongue in the present invention; Fig.10 for Figure 7 Enlarged view of point E in the middle; Fig.11 It is a cross-sectional view of the connection structure between the self-locking slider and the tank body in the present invention. DETAILED DESCRIPTION

[0025] See Figures 1 to 11The present invention comprises a tube body 1; one end of the tube body 1 is provided with a connecting insert 2 integrally formed with the tube body 1, and the other end of the tube body 1 is provided with a connecting tube 3 which can be matched with the connecting insert 2 on the adjacent tube body 1, the connecting insert 2 and the connecting tube 3 are both coaxial with the tube body 1 and connected, and the connecting insert 2 is provided with a sealing component which can be sealed when the adjacent tube bodies 1 are connected, and the sealing component comprises a plurality of sealing connection gaskets 4 sleeved on the connecting insert 2, and a sealing connection bottom ring 5 fixedly sleeved on the connecting insert 2 and pressed against the end surface of the tube body 1, the sealing connection gaskets 4 and the sealing connection bottom ring 5 are both plastic parts, and the connecting tube 3 is provided with a pressing groove 31 for each sealing connection gasket 4 to extend into, and a plug for the connecting insert 2 to be inserted into. The sealing connection gasket 4 comprises a first gasket body sleeved on the connecting plug 2, a first convex ring portion 41 integrally formed with the first gasket body and arranged on the left end surface of the first gasket body, and a first clamping convex ring 42 arranged on the left end surface of the first convex ring portion 41, a first sealing groove 43 for the first convex ring portion 41 to be inserted is provided on the right end surface of the first gasket body, the width of the first convex ring portion 41 is greater than the width of the first sealing groove 43, a first clamping groove 44 adapted to the first clamping convex ring 42 is provided in the first sealing groove 43, a second convex ring portion 51 which can extend into the first sealing groove 43 on the adjacent first gasket body is provided on the sealing connection bottom ring 5, and the second convex ring portion 51 can extend into the first sealing groove 43 on the adjacent first gasket body. The ring portion 51 is provided with a second clamping convex ring 52 that is adapted to the first clamping groove 44 in the adjacent first sealing groove 43. The inner wall of the pressure groove 31 is provided with a second sealing groove 311 for the first convex ring portion 41 on the adjacent first gasket body to be inserted. The width of the first convex ring portion 41 is greater than the width of the second sealing groove 311. The width of the second convex ring portion 51 is greater than the width of the first sealing groove 43. The second sealing groove 311 is provided with a second clamping groove 312 that is adapted to the first clamping convex ring 42 on the adjacent first convex ring portion 41. The outer wall of each first gasket body is provided with a follower ring portion 45. Each follower ring portion 45 drives each sealing connection gasket 4 to move forward through the plug-in fit of the connecting insert 2 and the connecting tube 3 and the friction fit with the inner wall of the pressure groove 31. After the sealing connection bottom ring 5 moves and the connecting insert 2 is plugged into the connecting insert on the adjacent pipe body 1, the sealing connection bottom ring 5 is sealed and connected to the adjacent sealing connection gasket 4 through the plug-in cooperation between the second convex ring portion 51 and the first sealing groove 43, and the plug-in cooperation between the second clamping convex ring 52 and the first clamping groove 44. The adjacent sealing connection gasket 4 is sealed and connected to the adjacent sealing connection gasket 4 through the plug-in cooperation between the first convex ring portion 41 and the first sealing groove 43, and the plug-in cooperation between the first clamping convex ring 42 and the first clamping groove 44. The sealing connection gasket 4 adjacent to the end face of the pressing groove 31 is sealed and connected to the end face of the pressing groove 31 through the plug-in cooperation between the first convex ring portion 41 and the second sealing groove 311, and the plug-in cooperation between the first clamping convex ring 42 and the second clamping groove 312.After the connecting insert 2 is plugged into the connecting tube 3 on the connected pipe body 1, a sealing connection is achieved through the cooperation between the end surface of the pressing groove 31 and the sealing connection gasket 4, the cooperation between each sealing connection gasket 4, and the cooperation between the sealing connection gasket 4 and the sealing connection bottom ring 5, and is fixed by a locking piece.

[0026] The cross-sections of the first clamping convex ring 42 and the second clamping convex ring 52 are circular, and the cross-sections of the first clamping groove 44 and the second clamping groove 312 are both elliptical. The first clamping convex ring 42 on the sealing connection gasket 4 adjacent to the end face of the pressing groove 31 is squeezed into the second clamping groove 312 through the plug-in fit of the connecting plug 2 and the connecting tube 3 and forms a line contact with the second clamping groove 312. The first clamping convex ring 42 is fitted with the inner wall of the second clamping groove 312 through the continuous extrusion of the end face of the pressing groove 31 on the sealing connection gasket 4 and forms a surface contact. The first clamping protrusion 42 on the adjacent sealing connection gasket 4 is pressed into the corresponding first clamping groove 44 through the plug-in fit between the connecting insert 2 and the connecting tube 3 and forms a line contact with the first clamping groove 44. The first clamping protrusion 42 is fitted with the inner wall of the first clamping groove 44 through the continuous extrusion of the adjacent sealing connection gasket 4 and forms a surface contact. The second clamping protrusion 52 is squeezed into the first clamping groove 44 of the adjacent sealing connection gasket 4 through the plug-in fit between the connecting insert 2 and the connecting tube 3 and forms a line contact with the first clamping groove 44. The second clamping protrusion 52 is fitted with the inner wall of the first clamping groove 44 through the continuous squeezing of the sealing connection bottom ring 5 by the sealing connection gasket 4 and forms a surface contact.

[0027] A plurality of side convex rings 9 are provided on the inner and outer walls of the second convex ring portion 51 and each first convex ring portion 41, and side adjustment grooves 8 adapted to each side convex ring 9 are provided on the inner walls of the first sealing groove 43 and the second sealing groove 311, and the groove width of each side adjustment groove 8 is greater than the ring width of the side convex ring 9, and each side convex ring 9 is slidably arranged in the corresponding side adjustment groove 8, and is pressed against the side wall of the side adjustment groove 8 by the continuous pressure between the sealing connection gasket 4 and the sealing connection bottom ring 5, or the continuous pressure between the sealing connection gaskets 4, or the continuous pressure of the end face of the pressing groove 31 on the sealing connection gasket 4.

[0028] The cross section of the follower ring portion 45 is hook-shaped. One end of each follower ring portion 45 is fixedly connected to the outer wall of the first gasket body. One end of each follower ring portion 45 away from the first gasket body is deflected toward the sealing connection bottom ring 5 .

[0029] The tube body 1 is provided with locking grooves 11 arranged opposite to each other, one end of each locking groove 11 is arranged on the outer wall of the tube body 1, and the other end of each locking groove 11 extends to the end face of the tube body 1 along the axial direction of the tube body 1, and each locking groove 11 is provided with a self-locking component 6 which can automatically lock the connected connecting plug 2 and the connecting tube 3 after insertion.

[0030] The self-locking component 6 includes a self-locking slider 61 slidably arranged in the locking groove 11, a self-locking rod 62 fixed on the self-locking slider 61, and a locking tongue 63 lifted and lowered on the self-locking rod 62. The two side walls of the locking groove 11 are provided with side slide grooves 12 arranged parallel to the extension direction of the locking groove 11, and each side slide groove 12 is slidably provided with a side slider 13. Each side slide groove 12 is provided with a compression spring 14, and the two ends of each compression spring 14 act on the side slide groove 12 and the side slider 13 respectively. Each side slider 13 moves in a direction away from the connecting tube 2 under the continuous action of the corresponding compression spring 14. Each side slider 13 is fixed on both sides of the self-locking slider 61. The locking tongue 63 is arranged on the self-locking rod 62 away from the self-locking slider 61 At one end, the self-locking rod 62 is provided with a lifting slot 64, and a first return spring 642 is provided in the lifting slot 64. The two ends of the first return spring 642 are respectively fixed to the bottom of the lifting slot 64 and the bottom of the lock tongue 63. The end surface of the connecting tube 3 is provided with a self-locking slot 33 corresponding to each self-locking rod 62, and each self-locking slot 33 is provided with a lock hole 34 adapted to the lock tongue 63. After the self-locking rod 62 extends into the self-locking slot 33, the lock tongue 63 extends into the lock hole 34 through the continuous force of the first return spring 642. The self-locking rod 62 on the self-locking slider 61 drives the end surface of the tube body 1 to press against the end surface of the adjacent connecting tube 3 through the continuous force of the compression spring 14 on the side slider 13 and the pressure of the lock tongue 63 on the lock hole 34.

[0031] The locking tongue 63 is provided with a guiding inclined surface 632 and a pressing surface 633 that can press against the inner wall of the locking hole 34 .

[0032] First limit slide blocks 631 are provided on both sides of the locking tongue 63, and first limit slide grooves 641 adapted to each first limit slide block 631 are provided on both sides of the lifting slide groove 64. The locking tongue 63 is set in the lifting slide groove 64 by the matching limit sliding of each first limit slide block 631 and the corresponding first limit slide groove 641.

[0033] One end of the locking hole 34 is connected to the self-locking slide groove 33, and the other end of the locking hole 34 extends to the side wall of the tube body 1. An unlocking block 7 is slidably provided in the locking hole 34, and one end of the unlocking block 7 extends out of the locking hole 34. Second limiting slide grooves 341 are provided on both sides of the locking hole 34, and second limiting sliders 342 adapted to each second limiting slide groove 341 are provided on both sides of the unlocking block 7. Each second limiting slide groove 341 is provided with a second return spring 343, and the two ends of each second return spring 343 are respectively fixed to the bottom of the second limiting slider 342 and the bottom of the second limiting slide groove 341. After the unlocking block 7 slides, it presses the lock tongue 63 and resets it through the continuous force of the second return spring 343 after the lock tongue 63 is separated from the locking hole 34.

[0034] The self-locking slider 61 is provided with a push rod 60 .

[0035] Working principle of the present invention: During the use of the present invention, two adjacent tube bodies 1 are connected. During the connection process, the connecting insert 2 is inserted into the slot 32 of the connecting tube 3, and during the plugging process, the follower ring portion 45 on each first gasket body drives each sealing connection gasket 4 to move toward the sealing connection bottom ring 5 through frictional cooperation with the side wall of the pressure groove 31 in the connecting tube 3. After the connecting insert 2 is fully plugged into the slot 32, the sealing connection gasket 4 adjacent to the end face of the pressure groove 31 is connected to the second sealing groove through the first convex ring portion 41. The plug-in fit of 311, the plug-in fit of the first clamping convex ring 42 and the second clamping groove 312 are sealed and connected with the end face of the pressing groove 31, the first clamping convex ring 42 on the sealing connection gasket 4 adjacent to the end face of the pressing groove 31 is squeezed into the second clamping groove 312 through the plug-in fit of the connecting plug 2 and the connecting tube 3 and forms a line contact with the second clamping groove 312, the first clamping convex ring 42 is continuously squeezed by the end face of the pressing groove 31 to the sealing connection gasket 4 and fits with the inner wall of the second clamping groove 312 and forms a surface contact; the adjacent sealing connection gaskets The first protruding ring 41 is plugged into the first sealing groove 43, and the first clamping protruding ring 42 is plugged into the first clamping groove 44 to seal the adjacent sealing connection gasket 4. The first clamping protruding ring 42 on the adjacent sealing connection gasket 4 is pressed into the corresponding first clamping groove 44 through the plugging and matching of the connecting insert 2 and the connecting tube 3, and forms a line contact with the first clamping groove 44. The first clamping protruding ring 42 is pressed into the inner wall of the first clamping groove 44 by the continuous extrusion of the adjacent sealing connection gasket 4, and forms a surface contact. The bottom ring 5 is sealed and connected to the adjacent sealing connection gasket 4 through the plug-in fit between the second convex ring portion 51 and the first sealing groove 43, and the plug-in fit between the second clamping convex ring 52 and the first clamping groove 44. The second clamping convex ring 52 is squeezed into the first clamping groove 44 of the adjacent sealing connection gasket 4 through the plug-in fit between the connecting insert 2 and the connecting tube 3 and forms a line contact with the first clamping groove 44. The second clamping convex ring 52 is fitted with the inner wall of the first clamping groove 44 through the continuous squeezing of the sealing connection gasket 4 on the bottom ring 5, and forms a surface contact.

[0036] The end surface of the pressing groove 31 is pressed against the adjacent sealing connection gasket 4, and each adjacent sealing connection gasket 4 is pressed against each other, and the sealing connection gasket 4 adjacent to the sealing connection bottom ring 5 is pressed against the sealing connection bottom ring 5, so that a multi-layer seal is formed between the pressing groove 31 and the end surface of the tube body 1, thereby ensuring the sealing of the connection between each tube body 1; During the process of fully plugging the connecting tube body 1 and the slot 32, each self-locking rod 62 extends into the corresponding self-locking slot 33. During the extension process, along with the extension of the self-locking rod 62, the locking tongue 63 on the self-locking rod 62 is compressed into the lifting slot 64 through the guide inclined surface 632 and the notch of the self-locking slot 33. After the end face of the connecting tube 3 is in contact with the end face of the tube body 1, the locking tongue 63 on the self-locking rod 62 has not yet cooperated with the locking hole 34. The operator can use the push rod 60 to drive the self-locking rod 62 to extend into the self-locking slot 33. During the pushing process of the push rod 60, the locking tongue 63 on the self-locking rod 62 is pressed into the lifting slot 64. During the process, the self-locking slider 61 drives the self-locking rod 62 to extend inward by overcoming the springs of each compression spring 14. When the lock tongue 63 drives the lock tongue 63 to extend into the lock hole 34 under the action of the first reset spring 642, the push rod 60 is released, and the pressing surface 633 of the lock tongue 63 presses against the side wall of the lock hole 34. Then the compression spring 14 starts to drive the self-locking slider 61 to reset, and the self-locking slider 61 drives the self-locking rod 62, and the lock tongue 63 on the self-locking rod 62 drives the connecting tube 3 to press against the tube body 1, thereby ensuring the stability and firmness of the connection between each adjacent tube body 1. When the tube bodies 1 need to be separated, the operator can press the unlocking block 7, and the unlocking block 7 drives the locking tongue 63 to slide down during the sliding process, until the locking tongue 63 is separated from the locking hole 34, and the unlocking block 7 is reset under the action of the second reset spring 343. After the locking tongue 63 is separated from the locking hole 34, the self-locking rod 62 is reset under the continuous action of the compression spring 14, and then the operator can separate the two adjacent tube bodies 1; The present invention effectively solves the problem in the prior art that the tube bodies 1 are detached and the sealing cannot be guaranteed when connected. Multiple seals are achieved through the cooperation of multiple sealing connection gaskets 4 and sealing connection bottom rings 5, thereby ensuring the sealing of the connection between the tube bodies 1. At the same time, through the cooperation of the locking tongue 63 and the locking hole 34 on the self-locking rod 62, the stability and firmness of the connection between the various tube bodies 1 are guaranteed. The structure is ingenious and efficient and practical.

[0037] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A seamless stainless steel tube having a tube body; characterized in that: One end of the tube body is provided with a connecting plug formed integrally with the tube body, and the other end of the tube body is provided with a connecting tube that can be adapted to the connecting plug on the adjacent tube body. The connecting plug and the connecting tube are both coaxial with the tube body and connected. The connecting plug is provided with a sealing component that can be sealed when the adjacent tube bodies are connected. The sealing component includes a plurality of sealing connection gaskets sleeved on the connecting plug, and a sealing connection bottom ring fixedly sleeved on the connecting plug and pressed against the end surface of the tube body. The sealing connection gasket and the sealing connection bottom ring are both plastic parts. The connecting tube is provided with a pressing groove for each sealing connection gasket to extend into, and a slot for the connecting plug to be inserted. The length of the slot is greater than The sealing connection gasket comprises a first gasket body sleeved on the connecting plug, a first convex ring portion integrally formed with the first gasket body and arranged on the left end surface of the first gasket body, and a first clamping convex ring arranged on the left end surface of the first convex ring portion, a first sealing groove for the first convex ring portion to be inserted into the right end surface of the first gasket body, the width of the first convex ring portion is greater than the width of the first sealing groove, a first clamping groove adapted to the first clamping convex ring is arranged in the first sealing groove, a second convex ring portion which can extend into the first sealing groove on the adjacent first gasket body is arranged on the sealing connection bottom ring, and a first clamping convex ring portion which can be adapted to the first clamping convex ring in the adjacent first sealing groove is arranged on the second convex ring portion A second clamping convex ring adapted to the clamping groove, the inner wall of the pressure groove is provided with a second sealing groove for the insertion of the first convex ring part on the adjacent first gasket body, the second sealing groove is provided with a second clamping groove adapted to the first clamping convex ring on the adjacent first convex ring part, and the outer wall of each first gasket body is provided with a follower ring part, each follower ring part drives each sealing connection gasket to move toward the sealing connection bottom ring through the plug-in cooperation of the connecting insert and the connecting tube, and the friction cooperation with the inner wall of the pressure groove, after the connecting insert is plugged into the connecting insert on the adjacent tube body, the sealing connection bottom ring is plugged into the first sealing groove by the second convex ring part, and the plug-in cooperation of the second clamping convex ring and the first clamping groove The sealing connection gaskets are sealed and connected with the adjacent sealing connection gaskets, and the adjacent sealing connection gaskets are sealed and connected with the adjacent sealing connection gaskets through the plug-in fit between the first convex ring part and the first sealing groove, and the plug-in fit between the first clamping convex ring and the first clamping groove. The sealing connection gasket adjacent to the end face of the pressing groove is sealed and connected with the end face of the pressing groove through the plug-in fit between the first convex ring part and the second sealing groove, and the plug-in fit between the first clamping convex ring and the second clamping groove. After the connecting insert is plugged into the connecting tube on the connected tube body, it is sealed and connected through the fit between the end face of the pressing groove and the sealing connection gasket, the fit between each sealing connection gasket, and the fit between the sealing connection gasket and the sealing connection bottom ring, and is fixed by a locking piece.

2. A seamless stainless steel pipe according to claim 1, characterized in that: The cross sections of the first clamping convex ring and the second clamping convex ring are circular, and the cross sections of the first clamping groove and the second clamping groove are both elliptical. The first clamping convex ring on the sealing connection gasket adjacent to the end face of the pressing groove is squeezed into the second clamping groove through the plug-in fit of the connecting insert and the connecting tube and forms a line contact with the second clamping groove. The first clamping convex ring is fitted with the inner wall of the second clamping groove through the continuous extrusion of the end face of the pressing groove on the sealing connection gasket, and forms a surface contact. The first clamping protrusion on the adjacent sealing connection gasket is pressed into the corresponding first clamping groove through the plug-in fit of the connecting insert and the connecting tube and forms a line contact with the first clamping groove. The first clamping protrusion is fitted with the inner wall of the first clamping groove through the continuous extrusion of the adjacent sealing connection gasket and forms a surface contact. The second clamping convex ring is squeezed into the first clamping groove of the adjacent sealing connection gasket through the plug-in cooperation between the connecting insert and the connecting tube and forms a line contact with the first clamping groove. The second clamping convex ring is fitted with the inner wall of the first clamping groove and forms a surface contact through the continuous squeezing of the sealing connection gasket on the sealing connection bottom ring.

3. A seamless stainless steel pipe according to claim 2, characterized in that: A plurality of side convex rings are provided on the inner and outer walls of the second convex ring portion and each first convex ring portion, and side adjustment grooves adapted to each side convex ring are provided on the inner walls of the first sealing groove and the second sealing groove, and the groove width of each side adjustment groove is greater than the ring width of the side convex ring, and each side convex ring is slidably arranged in the corresponding side adjustment groove, and is pressed against the side wall of the side adjustment groove by continuous pressure between the sealing connection gasket and the sealing connection bottom ring, or continuous pressure between the sealing connection gaskets, or continuous pressure of the end face of the pressure groove against the sealing connection gasket.

4. A seamless stainless steel pipe according to claim 3, characterized in that: The cross section of the follower ring is hook-shaped, one end of each follower ring is fixedly connected to the outer wall of the first gasket body, and one end of each follower ring away from the first gasket body is deflected toward the sealing connection bottom ring.

5. A seamless stainless steel pipe according to claim 4, characterized in that: The tube body is provided with locking grooves arranged opposite to each other, one end of each locking groove is arranged on the outer wall of the tube body, and the other end of each locking groove extends to the end face of the tube body along the axial direction of the tube body, and each locking groove is provided with a self-locking component which can automatically lock the connected connecting pipe and connecting tube after insertion.

6. A seamless stainless steel pipe according to claim 5, characterized in that: The self-locking component includes a self-locking slider slidably arranged in the locking groove, a self-locking rod fixed on the self-locking slider, and a locking tongue lifted and arranged on the self-locking rod. Side sliding grooves arranged parallel to the extension direction of the locking groove are provided on the two side walls of the locking groove. A side slider is slidably arranged in each side sliding groove. A compression spring is provided in each side sliding groove. The two ends of each compression spring act on the side sliding groove and the side slider respectively. Each side slider moves in a direction away from the connecting plug under the continuous action of the corresponding compression spring. Each side slider is fixed on both sides of the self-locking slider. The locking tongue is arranged on the self-locking rod away from the self-locking At one end of the slider, the self-locking rod is provided with a lifting slot, and the lifting slot is provided with a first return spring, and the two ends of the first return spring are respectively fixed to the bottom of the lifting slot and the bottom of the lock tongue, and the end face of the connecting tube is provided with a self-locking slot corresponding to each self-locking rod, and each self-locking slot is provided with a lock hole adapted to the lock tongue, and the lock tongue is extended into the lock hole by the continuous force of the first return spring after the self-locking rod is extended into the self-locking slot, and the self-locking rod on the self-locking slider drives the end face of the tube body to be pressed against the end face of the adjacent connecting tube by the continuous force of the compression spring on the side slider and the pressure of the lock tongue on the lock hole.

7. A seamless stainless steel pipe according to claim 6, characterized in that: The lock tongue is provided with a guiding inclined surface and a pressing surface which can press against the inner wall of the lock hole.

8. A seamless stainless steel pipe according to claim 7, characterized in that: First limit slide blocks are provided on both sides of the lock tongue, and first limit slide grooves adapted to each first limit slide block are provided on both sides of the lifting slide groove. The lock tongue is set in the lifting slide groove by the matching limit sliding of each first limit slide block and the corresponding first limit slide groove.

9. A seamless stainless steel pipe according to claim 8, characterized in that: One end of the lock hole is connected to the self-locking slide groove, and the other end of the lock hole extends to the side wall of the tube body, and an unlocking block is slidably provided in the lock hole, and one end of the unlocking block extends out of the lock hole, and second limiting slide grooves are provided on both sides of the lock hole, and second limiting sliding blocks adapted to each second limiting slide groove are provided on both sides of the unlocking block, and each second limiting slide groove is provided with a second return spring, and the two ends of each second return spring are respectively fixed to the bottom of the second limiting sliding block and the bottom of the second limiting slide groove. After the unlocking block slides, it presses the lock tongue and is reset by the continuous force of the second return spring after the lock tongue is separated from the lock hole.

10. A seamless stainless steel pipe according to claim 9, characterized in that: A push rod is arranged on the self-locking slide block.

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