Thin-walled stainless steel pipe connecting structure

Abstract

The present application belongs to the technical field of pipe connection, and discloses a thin-wall stainless steel pipe connection structure, which comprises a connection assembly, the connection assembly comprises a first pipe, a second pipe and a sealing mechanism, the end of the first pipe is provided with a second protruding part which is integrally formed with the first pipe and protrudes outward in the radial direction, an annular inclined groove is formed in the second protruding part close to the annular end face of the first pipe, the end of the second protruding part extends along the first pipe in the axial direction to form a first protruding part, and the inner wall of the first protruding part is provided with an elastic deformation cavity with an elliptical cross section. The present application can improve the connection firmness and sealing effect of the connection part, and avoid the leakage of medium at the connection part.

Description

Technical Field

[0001] This invention relates to the field of pipe fittings, and more specifically, to a thin-walled stainless steel pipe connection structure. Background Technology

[0002] Currently, when connecting multiple sections of stainless steel pipes, threads are installed at both ends of the stainless steel pipes for connection. A sealing ring can also be installed at the connection point to connect the two pipes together.

[0003] However, this method of sealing by thread or by sealing ring requires high precision in thread machining. If the thread machining precision is not high, it can easily lead to sealing failure at the pipe connection, resulting in leakage of the medium. Summary of the Invention

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a thin-walled stainless steel pipe connection structure to improve the connection strength and sealing effect at the connection point, and to prevent media leakage at the connection point.

[0005] A thin-walled stainless steel pipe connection structure includes a connection assembly, the connection assembly including a first pipe fitting, a second pipe fitting, and a sealing mechanism;

[0006] The lower end of the first pipe fitting has a second protrusion integrally formed with the first pipe fitting along the radial outward. The annular end face above the second protrusion has an annular inclined groove. The lower end of the second protrusion extends along the axial direction of the first pipe fitting to form a first protrusion. The inner wall of the first protrusion has an elastic deformation cavity with an elliptical cross-section.

[0007] The upper end of the second pipe fitting is coaxially provided with two layers of sleeves. The thickness of the inner sleeve is two-thirds of the thickness of the outer sleeve. A clamping groove is formed between the two layers of sleeves. The annular end face below the outer sleeve is also provided with an inclined groove.

[0008] The sealing mechanism includes a first sealing ring, a second sealing ring, and a clamp. The first protrusion is inserted into the clamping groove. One of the first sealing rings is sealed between the outer side wall of the first protrusion and the corresponding wall surface of the clamping groove. The other first sealing ring is sealed between the inner side wall of the first protrusion and the corresponding wall surface of the clamping groove. The second sealing ring is sealed between the lower bottom surface of the first protrusion and the corresponding axial wall surface of the clamping groove.

[0009] The clamp has inwardly rolled clamping rings at both the upper and lower ends. The clamping rings engage with the corresponding inclined grooves. The outer wall of the clamp has an arc groove. The clamp contracts radially inward through the arc groove, and the clamping rings are pressed into the two first inclined grooves.

[0010] Preferably, the upper end face of the inner jacket is provided with a locking protrusion on the outer side and a locking groove on the inner side. The first pipe is also provided with a mating locking groove on the outer side and a mating locking protrusion on the inner side of the second protrusion. The locking protrusion engages with the mating locking groove, and the mating locking protrusion engages with the locking groove.

[0011] Preferably, the clamp includes a clamp body, the upper and lower ends of which are respectively connected to corresponding clamping rings, and a bent portion is formed at the connection between the clamp body and the corresponding clamping ring, wherein the inner and outer walls of the bent portion are both arc-shaped structures.

[0012] Preferably, the ratio of the major axis to the minor axis of the elliptical cross-section of the elastic deformation cavity is (1.5 to 2):1.

[0013] Preferably, the first sealing ring is an O-ring rubber ring, and the second sealing ring is a silicone ring with a trapezoidal cross-section.

[0014] Preferably, a second arc angle is provided at the connection between the inclined groove on the first pipe and the outer circumferential wall of the second protrusion, and a first arc angle is provided at the connection between the inclined groove on the first pipe and the outer circumferential wall of the first pipe.

[0015] Preferably, the inclined groove on the second pipe fitting is provided with a second arc angle at the connection between it and the outer wall of the outer jacket, and the inclined groove on the second pipe fitting is provided with a first arc angle at the connection between it and the outer wall of the second pipe fitting. The arc end of the clamping ring is fitted with the first arc angle, and the inner arc wall of the bent part is fitted with the corresponding second arc angle.

[0016] Preferably, the inner and outer walls of the first protrusion are respectively provided with a first pressing groove, the lower end of the first protrusion is provided with a second pressing groove, the two inner walls of the clamping groove are provided with a first clamping groove, and the axial end face of the clamping groove is provided with a second clamping groove; the first sealing ring is embedded in the corresponding first clamping groove and the first pressing groove, and the second sealing ring is embedded in the second clamping groove and the second pressing groove.

[0017] Preferably, the thin-walled stainless steel pipe connection structure further includes a clamping assembly, which includes a housing, a cover fixedly connected to the end face of the housing, and a handle fixedly connected to the inner wall of the cover.

[0018] The inner wall of the housing is provided with sliding grooves on both sides. There are two sliding blocks inside the housing. The two sides of the sliding blocks are slidably connected to the corresponding sliding grooves. The inner wall of the sliding blocks is rotatably connected to a drive shaft. One end of the drive shaft is fixedly connected to a first gear. The outer axial end of the clamping ring is provided with a tooth. The first gear is adapted to be actuated to mesh with the tooth on the clamping ring. The other end of the drive shaft is fixedly connected to a worm gear.

[0019] The clamping assembly also includes a drive mechanism, which includes two cylinders fixedly installed on the inner wall of the housing, with the cylinder output ends fixedly connected to the corresponding slides.

[0020] Preferably, the drive mechanism further includes a first worm, a second worm, and a motor and a support plate fixedly installed on the inner wall of the housing;

[0021] An output shaft is fixedly connected to the motor output end. The end of the output shaft is rotatably connected to the support plate. A rotating sleeve is rotatably connected to the inner wall of the support plate. A second gear is fixedly connected to the top of the rotating sleeve and the output shaft. The two second gears mesh with each other.

[0022] The first worm and the second worm are respectively meshed with corresponding worm wheels. The top of the first worm is fixedly connected to a second cross shaft, which is slidably connected to the inner wall of the second worm. The top of the second worm is fixedly connected to a first cross shaft. The top of the first cross shaft passes through a support plate, a rotating sleeve, and a second gear from bottom to top. The first cross shaft is slidably connected to the second gear on the rotating sleeve. The circumferential walls of both the first worm and the second worm are rotatably connected to connecting plates via bearings. The connecting plates are rotatably connected to the drive shaft.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. When the first and second pipe fittings are pressed together, the elastic deformation cavity in the first protrusion will deform outward in the direction of the short axis (i.e., radial) to increase the clamping force on the first sealing rings on both sides, thereby improving the sealing effect. When the clamp ends are compressed, the parts located in the arc groove will press the second protrusion and the outer sleeve inward, and form a triangular support structure with the clamping points of the clamping rings at both ends, thereby improving the firmness of the connection between the first and second pipe fittings.

[0025] 2. The first pipe fitting has an integrally formed second protrusion and a first protrusion, which is more conducive to sealing compared with the existing split flange connection structure. The axially extended first protrusion forms a deep insertion with the clamping groove, which improves the connection strength. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the overall structure of the clamping assembly of the present invention;

[0029] Figure 3 This is a schematic diagram of the internal mounting structure of the housing of the present invention;

[0030] Figure 4 This is a schematic diagram of the mounting structure of the drive shaft of the present invention;

[0031] Figure 5 This is a schematic diagram of the overall structure of the clamping assembly of the present invention;

[0032] Figure 6 This is a partial structural schematic diagram of the second card sleeve of the present invention;

[0033] Figure 7 This is a schematic diagram of the installation structure of the limiting block of the present invention;

[0034] Figure 8 This is a schematic diagram of the installation structure of the steel strip of the present invention;

[0035] Figure 9 This is a partial structural diagram of the inner frame of the present invention;

[0036] Figure 10 This is a schematic diagram of the installation structure of the rubber belt of the present invention;

[0037] Figure 11 This is a schematic diagram of the overall structure of the connecting component of the present invention;

[0038] Figure 12 This is a schematic diagram of the connection structure between the first and second pipe fittings of the present invention;

[0039] Figure 13 This is a partial structural schematic diagram of the first pipe fitting of the present invention;

[0040] Figure 14 This is a partial structural schematic diagram of the second pipe fitting of the present invention;

[0041] Figure 15 This is a partial structural diagram of the clamp of the present invention;

[0042] Figure 16 This is a schematic diagram of the bending angle structure of the clamp of the present invention.

[0043] Explanation of the numbers in the diagram: 1. Clamping assembly; 101. Handle; 102. Cover; 103. Housing; 104. Hinge; 105. Slide groove; 106. Slide; 107. Cylinder; 108. Drive shaft; 109. First gear; 110. Motor; 111. Output shaft; 112. Support plate; 113. Rotating sleeve; 114. Second gear; 115. First cross shaft; 116. First worm gear; 117. Second cross shaft; 118. Second worm gear; 119. Connecting plate; 120. Worm wheel; 2. Clamping assembly; 201. First ferrule; 202. Second ferrule; 203. Rotating shaft; 204. T-shaped shaft; 205. Self-locking screw; 206. Rotating wheel; 207. Crank handle; 208. Limiting groove; 209. First arc surface; 210. Transmission plate; 211. 212. Limiting block; 213. Second arc surface; 214. Through hole; 215. Slide rod; 216. Limiting sleeve; 217. Spring; 218. Inner frame; 219. Through groove; 220. Expansion groove; 221. Steel strip; 222. Rubber strip; 3. Connecting assembly; 301. First pipe fitting; 302. Second pipe fitting; 303. First protrusion; 304. Second protrusion; 305. Inclined groove; 306. First arc angle; 307. Second arc angle; 308. First pressure groove; 309. Elastic deformation cavity; 310. Second pressure groove; 311. Jacket; 312. Clamping groove; 313. First clamping groove; 314. Second clamping groove; 315. First sealing ring; 316. Second sealing ring; 317. Clamp; 318. Protruding tooth; 319. Clamping ring; 320. Arc groove; 321. Bending part. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0045] like Figures 11-15 As shown, a thin-walled stainless steel pipe connection structure includes a connection component 3, which includes a first pipe fitting 301, a second pipe fitting 302, and a sealing mechanism.

[0046] The lower end of the first pipe fitting 301 has a second protrusion 304 integrally formed with the first pipe fitting 301, which protrudes radially outward. The annular end face above the second protrusion 304 has an annular inclined groove 305. The lower end of the second protrusion 304 extends axially along the first pipe fitting 301 to form a first protrusion 303. The inner wall of the first protrusion 303 has an elastic deformation cavity 309 with an elliptical cross-section.

[0047] The upper end of the second pipe fitting 302 is coaxially provided with two layers of sleeves 311. The thickness of the inner sleeve 311 is two-thirds of the thickness of the outer sleeve 311. A clamping groove 312 is formed between the two layers of sleeves 311. The annular end face below the outer sleeve 311 is also provided with a slanted groove 305.

[0048] The sealing mechanism includes two first sealing rings 315, a clamp 317, and a second sealing ring 316. The first protrusion 303 is inserted into the clamping groove 312. One of the first sealing rings 315 is sealed between the outer side wall of the first protrusion 303 and the corresponding wall surface on the clamping groove 312. The other first sealing ring 315 is sealed between the inner side wall of the first protrusion 303 and the corresponding wall surface on the clamping groove 312. The second sealing ring 316 is sealed between the lower bottom surface of the first protrusion 303 and the corresponding axial wall surface on the clamping groove 312.

[0049] The upper and lower ends of the clamp 317 are respectively provided with inwardly rolled clamping rings 319. The clamping rings 319 are engaged with the corresponding inclined grooves 305. The outer wall of the clamp 317 is provided with an arc groove 320. The clamp 317 is radially contracted inward through the arc groove 320, and the clamping rings 319 are simultaneously pressed into the two first inclined grooves 305.

[0050] The lower end of the first pipe fitting 301 has an integrally formed second protrusion 304 and a first protrusion 303, which is more conducive to sealing compared with the split flange connection structure. The axially extended first protrusion 303 forms a deep insertion with the clamping groove 312, which improves the connection strength.

[0051] The clamping rings 319 at both ends of the clamp 317 simultaneously press against the inclined groove 305, which can make the pressing force evenly distributed. The arc groove 320 guides radial contraction, which can reduce the phenomenon of excessive twisting and deformation of the clamp.

[0052] like Figures 12-14 As shown, in some embodiments, the upper end face of the inner jacket 311 is provided with a snap-fit ​​protrusion on the outer side and a snap-fit ​​groove on the inner side. The first pipe 301 is also provided with a mating snap-fit ​​groove on the outer side and a mating snap-fit ​​protrusion on the inner side of the second protrusion 304. The snap-fit ​​protrusion is engaged with the mating snap-fit ​​groove, and the mating snap-fit ​​protrusion is engaged with the snap-fit ​​groove.

[0053] The locking mechanism, through the engagement of the protrusion and the groove, and the interaction between the protrusion and the groove, provides a limiting effect, preventing the end of the inner jacket 311 from protruding into the pipe during the clamping process, thus avoiding unevenness of the inner wall at the pipe connection and affecting the flow rate of the medium in the pipe. At the same time, the limiting effect of the inner jacket 311 also provides lateral compression for the first sealing ring 315 and the first protrusion 303, improving the sealing performance of the first sealing ring 315 and the firmness of the first protrusion 303 installation.

[0054] like Figure 15 As shown, in some embodiments, the clamp 317 includes a clamp body, the upper and lower ends of which are respectively connected to corresponding clamping rings 319. A bent portion 321 is formed at the connection between the clamp body and the corresponding clamping ring 319. The inner and outer walls of the bent portion 321 are both arc-shaped structures.

[0055] Compared to the right-angle bend of the transmission section, the 321 double-arc design of the bending section can reduce stress concentration, improve resistance to elastic deformation, and enhance the stability of the structure after bending.

[0056] like Figure 13 As shown, in some embodiments, the ratio of the major axis to the minor axis of the elliptical cross-section of the elastic deformation cavity 309 is (1.5~2):1.

[0057] The major axis of the ellipse is the main deformation area of ​​the elastic deformation cavity 309, while the minor axis is the support area. Furthermore, the elliptical elastic deformation cavity 309 can disperse local stress concentration. Especially when the first protrusion 303 is inserted into the clamping groove 312, the major axis of the ellipse is consistent with the axial direction of the pipe, which can alleviate the axial stress during the assembly process. When the connecting ends of the first pipe 301 and the second pipe 302 are pressed against each other, the major axis of the elastic deformation cavity 309 provided in the first protrusion 303 will deform outward in the minor axis direction (i.e., radially), which will increase the clamping force on the first sealing rings 315 on both sides.

[0058] like Figure 12 As shown, in some embodiments, the first sealing ring 315 is an O-ring rubber ring, and the second sealing ring 316 is a silicone ring with a trapezoidal cross section.

[0059] The trapezoidal cross-section silicone ring can enhance the sealing force through cross-sectional deformation under high pressure.

[0060] like Figure 12 and Figure 14As shown, in some embodiments, the inclined groove 305 on the first pipe 301 is provided with a second arc angle 307 at the connection between it and the outer wall of the second protrusion 304, and a first arc angle 306 at the connection between it and the outer wall of the first pipe 301. The inclined groove 305 on the second pipe 302 is provided with a second arc angle 307 at the connection between it and the outer wall of the outer sleeve 311, and a first arc angle 306 at the connection between it and the outer wall of the second pipe 302. The arc end of the clamping ring 319 fits with the corresponding first arc angle 306, and the inner arc wall of the bent portion 321 fits with the corresponding second arc angle 307.

[0061] The inclined groove 305 is provided with a first arc angle 306 and a second arc angle 307 at the connection. The inner arc wall of the bent part 321 fits with the second arc angle 307, and the arc end of the clamping ring 319 fits with the first arc angle 306, which can form a continuous stress transmission path.

[0062] like Figure 12 and Figure 13 As shown, in some embodiments, the inner and outer walls of the first protrusion 303 are respectively provided with a first pressing groove 308, the lower end of the first protrusion 303 is provided with a second pressing groove 310, the two inner walls of the clamping groove 312 are provided with a first clamping groove 313, the axial end face of the clamping groove 312 is provided with a second clamping groove 314, the first sealing ring 315 is embedded in the corresponding first clamping groove 313 and the first pressing groove 308, and the second sealing ring 316 is embedded in the second clamping groove 314 and the second pressing groove 310.

[0063] The first pressing groove 308 cooperates with the first clamping groove 313 to restrict the displacement of the first sealing ring 315, and the second pressing groove 310 cooperates with the second clamping groove 314 to restrict the displacement of the second sealing ring 316.

[0064] like Figures 1-4 As shown, in some embodiments, a thin-walled stainless steel pipe connection structure further includes a clamping assembly 1, which includes a housing 103, a cover 102 fixedly connected to the end face of the housing 103, and a handle 101 fixedly connected to the inner wall of the cover 102.

[0065] The inner wall of the housing 103 is provided with sliding grooves 105 on both sides. The housing 103 is provided with two sliding blocks 106. The two sides of the sliding blocks 106 are slidably connected to the corresponding sliding grooves 105. The inner wall of the sliding blocks 106 is rotatably connected with a drive shaft 108. One end of the drive shaft 108 is fixedly connected with a first gear 109. The outer axial end of the clamping ring 319 is provided with a tooth 318. The first gear 109 meshes with the tooth 318 on the clamping ring 319. The other end of the drive shaft 108 is fixedly connected with a worm gear 120.

[0066] The clamping assembly 1 also includes a driving mechanism, which includes two cylinders 107 fixedly installed on the inner wall of the housing 103. The output ends of the cylinders 107 are respectively fixedly connected to the corresponding slides 106.

[0067] The drive mechanism also includes: a first worm gear 116, a second worm gear 118, and a motor 110 and a support plate 112 fixedly installed on the inner wall of the housing 103;

[0068] The output end of the motor 110 is fixedly connected to an output shaft 111. The end of the output shaft 111 is rotatably connected to a support plate 112. A rotating sleeve 113 is rotatably connected to the inner wall of the support plate 112. A second gear 114 is fixedly connected to the top of the rotating sleeve 113 and the output shaft 111. The two second gears 114 mesh with each other.

[0069] The first worm 116 and the second worm 118 are respectively meshed with the corresponding worm gear 120. The top of the first worm 116 is fixedly connected to the second cross shaft 117, which is slidably connected to the inner wall of the second worm 118. The top of the second worm 118 is fixedly connected to the first cross shaft 115. The top of the first cross shaft 115 passes through the support plate 112, the rotating sleeve 113 and the second gear 114 from bottom to top. The first cross shaft 115 is slidably connected to the second gear 114 on the rotating sleeve 113. The circumferential walls of the first worm 116 and the second worm 118 are rotatably connected to the connecting plate 119 through bearings. The connecting plate 119 is rotatably connected to the drive shaft 108.

[0070] In this embodiment, the distance between the first worm 116 and the second worm 118 is adjustable, thereby adjusting the distance between the two first gears 109. This allows for the use of clamps 317 of different sizes. Under the push of the cylinder 107, the first gears 109 compress the clamp 317, deforming it and completing the connection of the pipe. Specifically, the two cylinders 107 retract, driving the two slides 106 to move in opposite directions. When the slides 106 move, the drive shaft 108 drives the connecting plate 119 to move. The connecting plate 119 then drives the corresponding first worm 116 and second worm 118 to move in opposite directions, adjusting the distance between the two first gears 109 to accommodate clamps 317 of different lengths.

[0071] like Figures 5-7 As shown, in some embodiments, a thin-walled stainless steel pipe connection structure further includes a clamping component 2. The clamping component 2 includes a first ferrule 201 and a second ferrule 202. The ends of the first ferrule 201 and the second ferrule 202 are rotatably connected to a rotating shaft 203. The end of the housing 103 is fixedly connected to a plurality of hinge seats 104, and the rotating shaft 203 is fixedly installed in the corresponding hinge seat 104.

[0072] The first sleeve 201 is rotatably connected to a T-shaped shaft 204 at its end. A self-locking screw 205 is rotatably connected to the outer wall of the T-shaped shaft 204. A self-locking nut is threaded onto the self-locking screw 205. A rotating wheel 206 is fixedly connected to the end of the self-locking screw 205. A crank handle 207 is rotatably connected to the end face of the rotating wheel 206.

[0073] The second sleeve 202 has a free end with a through groove. A limiting groove 208 is provided on the wall of the free end opposite to the first sleeve 201. A transmission plate 210 is threaded to the outer wall of the self-locking screw 205. Two slide rods 214 are slidably connected to the inner wall of the transmission plate 210. A limiting sleeve 215 is fixedly connected to the outer wall of each slide rod 214. A spring 216 is sleeved on the outer wall of each slide rod 214. A limiting block 211 is fixedly connected to the end of the slide rod 214. The limiting block 211 engages with the limiting groove 208. A through hole 213 is provided on the outer wall of the limiting block 211. The end of the self-locking screw 205 passes through the through hole 213 and extends to its outer side. One end of the spring 216 is fixedly connected to the limiting sleeve 215, and the other end of the spring 216 is fixedly connected to the transmission plate 210. The second sleeve 202 has a first arc surface 209 at its end, and a second arc surface 212 is provided on both sides of the limiting block 211.

[0074] The self-locking screw 205 is flipped into the groove of the corresponding second sleeve 202. The second arc surface 212 on the limiting block 211 presses against the first arc surface 209 on the second sleeve 202. Under the elastic force of the spring 216, the limiting block 211 slides into the limiting groove 208. By turning the rocker handle 207, the rotating wheel 206 is driven to rotate. The rotating wheel 206 drives the self-locking screw 205 to rotate. The transmission plate 210 moves linearly along the axial direction of the self-locking screw 205 until it abuts against the limiting block 211. Then the transmission plate 210 pushes the limiting block 211 to move. The limiting block 211 pushes the second sleeve 202 to close with the first sleeve 201, and is firmly installed on the first pipe fitting 301 and the second pipe fitting 302.

[0075] The structure of this device, through the design of the first arc surface 209 and the second arc surface 212, enables the automatic centering of the limiting block 211 during the extrusion process with the assistance of the spring 216; at the same time, the setting of the flip-out self-locking screw 205 enables the quick separation of the second ferrule 202 and the first ferrule 201, which is convenient for disassembly.

[0076] like Figure 8 , Figure 9 and Figure 10As shown, in some embodiments, the inner walls of the first sleeve 201 and the second sleeve 202 are both fixedly connected to an inner frame 217. The inner wall of the inner frame 217 is provided with a plurality of through slots 218 at equal intervals. An expansion slot 219 communicating with the corresponding through slot 218 is provided in the middle of the corresponding through slot 218. A steel strip 220 is passed through the inner wall of the inner frame 217. The steel strip 220 passes through the through slots 218 and is slidably connected to them. The two ends of the steel strip 220 are fixedly connected to the inner frame 217. A rubber strip 221 is fixedly connected to the outer wall of the steel strip 220. The rubber strip 221 passes through the plurality of expansion slots 219.

[0077] During the closing process of the first clamping sleeve 201 and the second clamping sleeve 202, the inner frame 217 on the inner side is driven to close. At this time, the steel strip 220 in the inner frame 217 squeezes the outer walls of the first pipe fitting 301 and the second pipe fitting 302 respectively. The squeezed steel strip 220 slides along the through groove 218 and adaptively adjusts the length of the arc end located outside the inner frame 217 so that the rubber strip 221 on the steel strip 220 can fully contact the outer walls of the first pipe fitting 301 and the second pipe fitting 302, thereby improving the clamping force. After adaptive adjustment, the arc end located outside the inner frame 217 will elastically indent during squeezing, further increasing the contact area with the outer walls of the first pipe fitting 301 and the second pipe fitting 302. The design of the rubber strip 221 can increase the friction between the rubber strip and the pipe and protect the outer wall of the pipe.

[0078] like Figure 10 As shown, in some embodiments, the inner frame 217 bends the steel strip 220 into a continuous S-shaped structure through the through slot 218, with the outer arc end having a bending angle of 100°.

[0079] The S-shaped steel strip 220 can form distributed elastic support, improve the uniformity of clamping pressure, and the design of the curved end bending angle can facilitate the rapid sliding of the steel strip 220 along the through groove 218 during the clamping process.

[0080] Working principle: Insert the first protrusion 303 at the end of the first pipe fitting 301 into the clamping groove 312 on the second pipe fitting 302;

[0081] The locking protrusion at the end of the inner layer of the second pipe fitting 302 is engaged into the mating groove on the second protrusion 304.

[0082] The first sealing ring 315 and the second sealing ring 316 are snapped and fixed by the first pressing groove 308 and the second pressing groove 310 on the first protrusion 303.

[0083] The strip-shaped clamp 317 is fastened to the corresponding inclined groove 305 on the sleeve 311 and the second protrusion 304;

[0084] Secure the two sets of first ferrules 201 and second ferrules 202 onto the first pipe fitting 301 and the second pipe fitting 302 respectively, and flip the self-locking screw 205 into the corresponding second ferrule 202.

[0085] The second arc surface 212 on the limiting block 211 presses against the first arc surface 209 on the second sleeve 202, causing the limiting block 211 to slide into the limiting groove 208 under the elastic force of the spring 216. By turning the rocker handle 207, the rotating wheel 206 is driven to rotate, and the rotating wheel 206 drives the self-locking screw 205 to rotate. The transmission plate 210 moves linearly along the axial direction of the self-locking screw 205, and then abuts against the limiting block 211 and pushes the limiting block 211 to move. The limiting block 211 pushes the second sleeve 202 to close with the first sleeve 201, and is firmly installed on the first pipe fitting 301 and the second pipe fitting 302.

[0086] The first gears 109 are respectively installed on both sides of the clamp 317. The cylinder 107 pushes the slide 106 to move, so that the two first gears 109 squeeze the clamp 317 respectively. The clamping ring 319 is bent from the included angle of 88° at point A to the included angle of 73° at point B, and is firmly stuck in the corresponding inclined groove 305. When the connecting ends of the first pipe 301 and the second pipe 302 are squeezed against each other, the elastic deformation cavity 309 provided in the first protrusion 303 will deform and push outward in the radial direction, thereby increasing the clamping force on the first sealing rings 315 on both sides.

[0087] When the clamp 317 is compressed at both ends, the part located in the arc groove 320 compresses the second protrusion 304 and the outer sleeve 311 inward, and forms a triangular support structure with the clamping points of the clamping rings 319 at both ends, which improves the firmness of the connection between the first pipe fitting 301 and the second pipe fitting 302; specifically, the two contact points of the clamping ring 319 and the first arc angle 306 are compressed towards each other, and the part of the arc groove 320 on the clamping ring 319 is compressed radially inward. These three points are triangular compression points, forming a triangular support structure;

[0088] Then, the motor 110 drives the first cross shaft 115 to rotate through the second gear 114. The first cross shaft 115 drives the first worm 116 to rotate synchronously through the second worm 118 and the second cross shaft 117, so that the clamp 317 slides circumferentially in the groove 305 on the second protrusion 304 and the sleeve 311 during the clamping process, connecting the first pipe 301 and the second pipe 302 together.

[0089] During the installation of clamp 317, firstly, lubricating powder is applied to the inclined groove 305, the first arc angle 306, and the inner wall of clamp 317. The lubricating powder is existing technology and will not be described in detail in this embodiment. The lubricating powder can form a protective film on the contact surface between clamp 317 and inclined groove 305 and first arc angle 306, reducing the friction between metals, reducing wear, and facilitating the sliding of clamp 317 during the clamping process. By adjusting the distance between the two first gears 109 by cylinder 107, clamp 317 is clamped, so that the clamping ring 319 on clamp 317 is pressed into inclined groove 305. The first gear 109 pushes clamp 317 to slide on the inner wall of inclined groove 305 until clamp 317 is formed into a ring structure, so that clamp 317 is tightly clamped on the first pipe fitting 301 and the second pipe fitting 302.

[0090] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thin-walled stainless steel pipe connection structure, characterized in that, Including connection component 3, connection component (3) includes: The first pipe fitting (301) has a second protrusion (304) integrally formed with the first pipe fitting (301) by radially protruding outward at its lower end. An annular groove (305) is provided on the annular end face above the second protrusion (304). The lower end of the second protrusion (304) extends along the axial direction of the first pipe fitting (301) to form a first protrusion (303). The inner wall of the first protrusion (303) is provided with an elastic deformation cavity (309) with an elliptical cross-section. The major axis of the elliptical elastic deformation cavity (309) is consistent with the axial direction of the first pipe fitting (301). The second pipe fitting (302) has two layers of sleeves (311) coaxially arranged at the upper end. The thickness of the inner sleeve (311) is two-thirds of the thickness of the outer sleeve (311). A clamping groove (312) is formed between the two layers of sleeves (311). An inclined groove (305) is opened on the annular end face below the outer sleeve (311). The sealing mechanism includes a first sealing ring (315), a second sealing ring (316), and a clamp (317). The first protrusion (303) is inserted into the clamping groove (312). One of the first sealing rings (315) is sealed between the outer wall of the first protrusion (303) and the corresponding wall surface of the clamping groove (312). Another first sealing ring (315) is sealed between the inner wall of the first protrusion (303) and the corresponding wall surface of the clamping groove (312). The second sealing ring (316) is sealed between the bottom surface of the first protrusion (303) and the corresponding axial wall surface of the clamping groove (312). The clamp (317) has inwardly rolled clamping rings (319) at its upper and lower ends respectively. The clamping rings (319) are engaged with the corresponding inclined grooves (305). The outer wall of the clamp (317) is provided with an arc groove (320). The clamp (317) contracts radially inward through the arc groove (320). The clamping rings (319) are pressed into the two first inclined grooves (305).

2. The thin-walled stainless steel pipe connection structure according to claim 1, characterized in that: The upper end face of the inner sleeve (311) is provided with a snap-fit ​​protrusion on the outer side and a snap-fit ​​groove on the inner side. The first pipe (301) is also provided with a mating snap-fit ​​groove on the outer side and a mating snap-fit ​​protrusion on the inner side of the second protrusion (304). The snap-fit ​​protrusion is engaged with the mating snap-fit ​​groove, and the mating snap-fit ​​protrusion is engaged with the snap-fit ​​groove.

3. The thin-walled stainless steel pipe connection structure according to claim 2, characterized in that: The clamp (317) includes a clamp body, the upper and lower ends of which are connected to corresponding clamping rings (319) respectively. A bent portion (321) is formed at the connection between the clamp body and the corresponding clamping ring (319). The inner and outer walls of the bent portion (321) are both arc-shaped structures.

4. The thin-walled stainless steel pipe connection structure according to claim 3, characterized in that: The ratio of the major axis to the minor axis of the elliptical cross-section of the elastic deformation cavity (309) is (1.5~2):

1.

5. The thin-walled stainless steel pipe connection structure according to claim 4, characterized in that: The inclined groove (305) on the first pipe fitting (301) is provided with a second arc angle (307) at the connection between the inclined groove (305) on the first pipe fitting (301) and the outer circumferential wall of the second protrusion (304), and the inclined groove (305) on the first pipe fitting (301) is provided with a first arc angle (306) at the connection between the inclined groove (305) on the first pipe fitting (301) and the outer circumferential wall of the first pipe fitting (301).

6. The thin-walled stainless steel pipe connection structure according to claim 5, characterized in that: The inclined groove (305) on the second pipe fitting (302) is connected to the outer wall of the outer jacket (311) with a second arc angle (307), and the inclined groove (305) on the second pipe fitting (302) is connected to the outer wall of the second pipe fitting (302) with a first arc angle (306). The arc end of the clamping ring (319) fits with the first arc angle (306), and the inner arc wall of the bent part (321) fits with the corresponding second arc angle (307).

7. The thin-walled stainless steel pipe connection structure according to claim 6, characterized in that: The inner and outer walls of the first protrusion (303) are respectively provided with a first pressing groove (308), the lower end of the first protrusion (303) is provided with a second pressing groove (310), the two inner walls of the clamping groove (312) are provided with a first clamping groove (313), and the axial end face of the clamping groove (312) is provided with a second clamping groove (314); the first sealing ring (315) is embedded in the corresponding first clamping groove (313) and the first pressing groove (308), and the second sealing ring (316) is embedded in the second clamping groove (314) and the second pressing groove (310).

8. The thin-walled stainless steel pipe connection structure according to claim 1, characterized in that: It also includes a clamping assembly (1), which includes a housing (103), a cover (102) fixedly connected to the end face of the housing (103), and a handle (101) fixedly connected to the inner wall of the cover (102). The inner wall of the housing (103) is provided with sliding grooves (105) on both sides. The housing (103) is provided with two sliding blocks (106). The two sides of the sliding blocks (106) are slidably connected to the corresponding sliding grooves (105). The inner wall of the sliding blocks (106) is rotatably connected with a drive shaft (108). One end of the drive shaft (108) is fixedly connected with a first gear (109). The outer axial end of the clamping ring (319) is provided with a tooth (318). The first gear (109) is adapted to be actuated to mesh with the tooth (318) on the clamping ring (319). The other end of the drive shaft (108) is fixedly connected with a worm gear (120). The clamping assembly (1) also includes a drive mechanism, which includes two cylinders (107) fixedly installed on the inner wall of the housing (103), and the output ends of the cylinders (107) are fixedly connected to the corresponding slides (106).

9. The thin-walled stainless steel pipe connection structure according to claim 6, characterized in that: The drive mechanism also includes a first worm (116), a second worm (118), and a motor (110) and a support plate (112) fixedly installed on the inner wall of the housing (103); The output end of the motor (110) is fixedly connected to the output shaft (111), the end of the output shaft (111) is rotatably connected to the support plate (112), the inner wall of the support plate (112) is rotatably connected to the rotating sleeve (113), and the top of the rotating sleeve (113) and the output shaft (111) are both fixedly connected to the second gear (114), and the two second gears (114) mesh with each other; The first worm (116) and the second worm (118) are respectively meshed with the corresponding worm wheel (120). The top of the first worm (116) is fixedly connected to the second cross shaft (117). The second cross shaft (117) is slidably connected to the inner wall of the second worm (118). The top of the second worm (118) is fixedly connected to the first cross shaft (115). The top of the first cross shaft (115) passes through the support plate (112), the rotating sleeve (113), and the second gear (114) from bottom to top. The first cross shaft (115) is slidably connected to the second gear (114) on the rotating sleeve (113). The circumferential walls of the first worm (116) and the second worm (118) are rotatably connected to the connecting plate (119) through the bearing. The connecting plate (119) is rotatably connected to the drive shaft (108).

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