Connecting structure of metal pipeline and non-metal pipeline

Abstract

The invention discloses a connecting structure of a metal pipeline and a non-metal pipeline, and belongs to the technical field of pipeline connection.The connecting structure of the metal pipeline and the non-metal pipeline comprises a stainless steel pipe, a plastic pipeline and a connecting mechanism, and the stainless steel pipe and the plastic pipeline are both movably inserted into the connecting mechanism; an outer wall pressing mechanism is rotationally connected to the interior of the connecting mechanism, and an inner wall pressing mechanism used for pressing the inner walls of the stainless steel pipe and the plastic pipeline is slidably connected to the interior of the connecting mechanism; and an abutting mechanism used for fixing the stainless steel pipe is fixedly installed in the connecting mechanism, and clamping mechanisms used for clamping the stainless steel pipe and the plastic pipeline are fixedly installed on the two sides of the connecting mechanism. A pressing plate of the inner wall pressing mechanism presses the joint of the stainless steel pipe and the plastic pipeline, and the stability of the joint of the stainless steel pipe and the plastic pipeline is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline connection, and in particular relates to a connection structure between a metal pipeline and a non-metal pipeline. Background Art

[0002] Pipeline connection technology is one of the most basic technologies in the field of chemical machinery. The stability of pipeline connection determines the operating stability of the equipment. There are many ways to connect pipelines, such as welding, flange connection, threaded connection, socket connection, etc. During construction, the appropriate connection method should be selected according to the material of the pipe used and specific needs. Each connection method has its specific application scenarios and advantages and disadvantages. Therefore, various factors need to be considered comprehensively in practical applications, such as pipeline material, working pressure, temperature, medium, etc. Generally speaking, the two pipes used for connection should be of the same material and have the same physical and chemical properties, so that the connection method can adapt to the two pipes at the same time. However, in some specific application scenarios, it is necessary to connect two pipes of different materials, such as the connection between metal pipes and non-metallic pipes.

[0003] In the petrochemical production process, due to the complexity and diversity of the media, there are both corrosive media and high-temperature and high-pressure media. In order to meet the different media transportation needs, it is necessary to connect metal pipes with non-metallic pipes. For example, when transporting corrosive media, non-metallic pipes can be used to improve the corrosion resistance of the system; when transporting high-temperature and high-pressure media, metal pipes are needed to ensure the safety and reliability of the system. In the prior art, the connection methods between metal pipes and non-metallic pipes generally include: pipe clamp connection, adapter connection, ferrule connection, etc. The above structure is adaptable to the connection of small-diameter pipes. However, for large pipes, the internal fluid will exert a lot of pressure on the pipe. When the pipe is subjected to hundreds of kilograms of fluid pressure, when the metal pipe is connected to the non-metallic pipe, the two will slip and separate, resulting in leakage.

[0004] Therefore, there is an urgent need to provide a connection structure between a metal pipe and a non-metal pipe to solve the above problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a connection structure between a metal pipe and a non-metal pipe.

[0006] The technical solution adopted to solve the above technical problems is: to provide a connection structure of a metal pipe and a non-metal pipe, including a stainless steel pipe, a plastic pipe and a connection mechanism, wherein the stainless steel pipe and the plastic pipe are both movably inserted inside the connection mechanism, and one end of the stainless steel pipe is movably fitted with one end of the plastic pipe, and further comprising; An outer wall pressing mechanism for pressing the surface of the plastic pipe is rotatably connected inside the connecting mechanism, a driving mechanism is fixedly installed on the surface of the connecting mechanism, and an inner wall pressing mechanism for pressing the stainless steel pipe and the inner wall of the plastic pipe is slidably connected inside the connecting mechanism; An abutment mechanism for fixing the stainless steel pipe is fixedly installed inside the connecting mechanism, and clamping mechanisms for clamping the stainless steel pipe and the plastic pipe are fixedly installed on both sides of the connecting mechanism.

[0007] The present invention is further configured as follows: a plurality of limiting grooves are provided at one end of the stainless steel pipe, and a plurality of racks are fixedly mounted on an inner wall of one side of the limiting grooves.

[0008] Through the above technical solution, when the stainless steel pipe is inserted into the connecting pipe, the limit groove is aligned with the limit block and inserted until the limit groove and the limit block form a whole. When the stainless steel pipe moves, the rack engages with the half-shaft gear, thereby causing the half-shaft gear to rotate, and the abutment block abuts against the other side of the limit groove, thereby improving the stability of the connection between the stainless steel pipe and the connecting pipe.

[0009] The present invention is further configured as follows: the connecting mechanism includes a connecting pipe, the stainless steel pipe and the plastic pipe are movably inserted inside the connecting pipe, retaining rings are fixedly installed at both ends of the surface of the connecting pipe, a fixing ring is fixedly installed in the middle of the surface of the connecting pipe, a plurality of first through holes are opened in the fixing ring and the connecting pipe, fan-shaped grooves are opened on both sides of the fixing ring near the first through holes, symmetrical vertical grooves are opened in the fixing ring below the fan-shaped grooves, one end of the vertical grooves is fixedly connected to one end of the fan-shaped groove, and a positioning groove is opened in the fixing ring below the vertical groove.

[0010] Through the above technical scheme, the stainless steel pipe is inserted from the left side of the connecting pipe, and the plastic pipe is inserted from the right side of the connecting pipe, thereby completing the docking between the stainless steel pipe and the connecting pipe. The setting of the two retaining rings is convenient for the clamping mechanism to clamp the stainless steel pipe and the plastic pipe. The setting of the fixing ring is used for the inner wall pressing mechanism to press the inner walls of the stainless steel pipe and the plastic pipe, so that the connection between the stainless steel pipe and the plastic pipe is more stable. The setting of the first through hole provides moving space for the lifting and lowering of the pull rod. After the pull rod rises, the pressing plate fits with the inner walls of the stainless steel pipe and the plastic pipe, and the pull rod is rotated. The two first fixed blocks rotate in the fan-shaped groove, so that the pull rod remains in the rising state, and the pressing plate continues to press the inner walls of the stainless steel pipe and the plastic pipe. The setting of the vertical groove facilitates the two first fixed blocks to follow the pull rod to rise, and the setting of the positioning groove provides space for the lifting and lowering of the positioning ring and the connecting rod.

[0011] The present invention is further configured as follows: the outer wall pressing mechanism includes four flip plates, the flip plates are rotatably connected to the inside of the connecting pipe, and a plurality of first protrusions are fixedly installed on the lower surface of the flip plates, and the first protrusions are movably fitted with the surface of the plastic pipe.

[0012] Through the above technical solution, the flip plate is initially in an inclined state. When the plastic pipe is inserted into the connecting pipe from the right side, the end squeezes the flip plate, and the flip plate rotates from the inclined state to the horizontal state. At this time, the first protrusion presses the surface of the plastic pipe, so that the plastic pipe can be fixed when it is connected to the inside of the pipe.

[0013] The present invention is further configured as follows: a first rotating shaft and a torsion spring are fixedly installed on both sides of the flip plate, the first rotating shaft passes through the inside of the torsion spring, a plurality of flip grooves are provided on the surface of the connecting pipe, the flip plate is rotatably connected inside the flip groove, rotating shaft grooves are provided on the inner walls on both sides of the flip groove, the first rotating shaft is rotatably connected inside the rotating shaft groove, and the other end of the torsion spring is fixedly connected to the inner wall of the rotating shaft groove.

[0014] Through the above technical solution, the first rotating shaft is set so that the flip plate can rotate inside the flip groove, and the torsion spring is set so that the flip plate can be turned from a horizontal state back to an inclined state, waiting for the next use, and the rotating shaft groove provides space for the first rotating shaft.

[0015] The present invention is further configured as follows: the driving mechanism includes a motor, the motor is fixedly mounted on the surface of the right retaining ring, the output end of the motor is transmission-connected with a first screw, a sliding ring is threadedly connected with the surface of the first screw, the sliding ring is slidably connected between the fixed ring and the right retaining ring, the inner wall of the sliding ring is movably fitted with the upper surface of the flip plate, a guide rod is fixedly mounted between the fixed ring and the right retaining ring, and the sliding ring is slidably connected to the surface of the guide rod.

[0016] Through the above technical solution, when the flip plate is squeezed by the plastic pipe and is in a horizontal state, the motor is started, and the first screw rotates at this time. The sliding ring moves between the fixed ring and the right retaining ring until it moves to the surface of the flip plate. The sliding ring presses the flip plate again, so that the first protrusion can be stably pressed on the surface of the plastic pipe, making the plastic pipe more stable when connected inside the connecting pipe. The setting of the guide rod prevents the sliding ring from deflecting when moving.

[0017] The present invention is further configured as follows: the inner wall pressing mechanism includes four groups of pressing plates, the pressing plates are slidably connected to the inside of the connecting pipe, a plurality of second protrusions are fixedly installed on the surface of the pressing plates, and the second protrusions are movably fitted with the inner walls of the stainless steel pipe and the plastic pipe.

[0018] Through the above technical solution, the inner wall pressing mechanism presses the inner wall of the connection between the stainless steel pipe and the plastic pipe together, thereby improving the stability of the connection between the stainless steel pipe and the plastic pipe. When one end of the stainless steel pipe is connected to one end of the plastic pipe inside the connecting pipe, the pull rod is pulled upward, and the pressing plate is able to rise through the connection of the connecting rod until the upper surface of the pressing plate fits with the inner wall of the connection between the stainless steel pipe and the plastic pipe. The second protrusion increases the friction between the pressing plate and the inner wall of the stainless steel pipe and the plastic pipe, thereby improving the stability of the connection between the stainless steel pipe and the plastic pipe, and at the same time improving the stability of the connection between the connecting pipe and the stainless steel pipe and the plastic pipe.

[0019] The present invention is further configured as follows: a connecting rod is fixedly installed on the surface of the pressing plate, a positioning ring is fixedly installed on the end of the connecting rod, a spring is fixedly installed on the surface of the positioning ring, the other end of the spring is fixedly connected to the inner wall of the positioning groove, a rotating block is rotatably connected inside the positioning ring, a pull rod is fixedly installed on the surface of the rotating block, the pull rod passes through the inside of the spring, a symmetrical first fixed block is fixedly installed on the surface of the pull rod, the connecting rod and the positioning ring are both slidably connected inside the positioning groove, the pull rod is slidably connected inside the first through hole, the first fixed block is slidably connected inside the vertical groove, and the first fixed block is rotatably connected inside the fan-shaped groove.

[0020] Through the above technical solution, when the pressing plate needs to be moved, the pull rod is pulled upward, the first fixed block rises inside the vertical groove, the pull rod rises and drives the rotating block to rise, the rotating block rotates inside the positioning ring, thereby driving the positioning ring to rise inside the positioning groove, the positioning ring is connected to the connecting rod, thereby driving the pressing plate to rise inside the connecting pipe until it fits with the connection between the stainless steel pipe and the plastic pipe. At this time, the pull rod is rotated, and the two first fixed blocks rotate inside the fan-shaped groove until they rotate to the other side of the fan-shaped groove, so that the pull rod remains in an upward state, so that the pressing plate can continue to press the connection between the stainless steel pipe and the plastic pipe.

[0021] The present invention is further configured as follows: the abutment mechanism includes four groups of limit blocks, the limit blocks are fixedly mounted on the inner wall of the connecting pipe, the limit blocks are slidably connected inside the limit groove, a rack groove is provided on one side of the limit block, the rack is slidably connected inside the rack groove, a plurality of gear grooves are provided inside the limit block, a second rotating shaft is rotatably connected inside the gear groove, a half-shaft gear is fixedly mounted on the surface of the second rotating shaft, the half-shaft gear is movably meshed with the rack, an extension block is fixedly mounted on the surface of the half-shaft gear, one end of the extension block is rotatably connected with an abutment block, the abutment block is movably fitted with the inner wall on the other side of the limit groove, a second through hole is provided at one end of the limit block, and the connecting rod is slidably connected inside the second through hole.

[0022] Through the above technical solution, after the limiting groove is aligned with the limiting block, the stainless steel pipe is inserted from the left side of the connecting pipe, the rack moves inside the rack groove until it meshes with the half-shaft gear, and the half-shaft gear rotates, driving the extension block and the abutment block to rotate, and the abutment block rotates to fit the inner wall on the other side of the limiting groove, thereby squeezing the stainless steel pipe, further improving the stability of the connection between the stainless steel pipe and the connecting pipe, the gear groove is set to provide space for the rotation of the half-shaft gear, and the second through hole is set to provide space for the rise of the connecting rod.

[0023] The present invention is further configured as follows: the clamping mechanism includes a second fixed block, the second fixed block is fixedly mounted on the surfaces of the two retaining rings, the internal thread of the second fixed block is connected to a second screw, the end of the second screw is rotatably connected to a chuck, and the chuck is movably fitted to the surface of the stainless steel pipe and the plastic pipe.

[0024] Through the above technical solution, the second fixed block supports the clamping mechanism. When the stainless steel pipe and the plastic pipe are inserted into the connecting pipe, the second screw is rotated. The movement of the second screw drives the chuck to move to the surface of the stainless steel pipe and the plastic pipe to perform secondary fixation on the stainless steel pipe and the plastic pipe, thereby further improving the stability of the connection between the stainless steel pipe and the plastic pipe inside the connecting pipe.

[0025] The beneficial effects of the present invention are as follows: 1. The present invention is provided with an outer wall pressing mechanism and an abutting mechanism. The outer wall pressing mechanism presses and fixes the plastic pipe on the right side of the connecting pipe, so that the connection between the plastic pipe and the connecting pipe is more stable. The abutting block of the abutting mechanism abuts against the inner wall of the limiting groove, so that the connection between the stainless steel pipe and the connecting pipe is more stable. 2. The present invention is provided with an inner wall pressing mechanism, and the pressing plate of the inner wall pressing mechanism presses the connection between the stainless steel pipe and the plastic pipe, thereby improving the stability of the connection between the stainless steel pipe and the plastic pipe, and at the same time improving the stability of the connection between the connecting pipe and the stainless steel pipe and the plastic pipe, thereby preventing the stainless steel pipe from being separated from the plastic pipe; 3. The present invention is provided with a clamping mechanism, which is arranged on the left and right sides of the connecting pipe. The surfaces of the stainless steel pipe and the plastic pipe are clamped by the clamp to achieve secondary fixation of the stainless steel pipe and the plastic pipe, prevent the stainless steel pipe and the plastic pipe from being separated at the connection, and improve the transportation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the connection mechanism of the present invention; Figure 3 It is a schematic diagram of the connecting pipeline structure of the present invention; Figure 4It is a schematic diagram of the stainless steel tube structure of the present invention; Figure 5 A schematic diagram of the flip plate structure of the present invention; Figure 6 A schematic diagram of the driving mechanism structure of the present invention; Figure 7 It is a schematic diagram of the structure of the inner wall pressing mechanism of the present invention; Figure 8 It is a schematic diagram of the structure of the abutment mechanism of the present invention; Fig. 9 It is a schematic diagram of the half-shaft gear structure of the present invention; Fig.10 It is a schematic diagram of the structure of the clamping mechanism of the present invention; Fig.11 for Figure 2 Enlarged view of point A in the middle.

[0027] Figure numerals: 1, stainless steel pipe; 11, limit groove; 12, rack; 2, plastic pipe; 3, connecting mechanism; 31, connecting pipe; 32, retaining ring; 33, fixing ring; 331, first through hole; 332, fan-shaped groove; 333, vertical groove; 334, positioning groove; 4, outer wall pressing mechanism; 41, flip plate; 42, first protrusion; 43, first rotating shaft; 44, torsion spring; 45, flip groove; 46, rotating shaft groove; 5, driving mechanism; 51, motor; 52, first screw; 53, sliding ring ; 54. Guide rod; 6. Inner wall pressing mechanism; 61. Pressing plate; 62. Second protrusion; 63. Connecting rod; 631. Positioning ring; 632. Spring; 64. Rotating block; 65. Pull rod; 651. First fixed block; 7. Abutment mechanism; 71. Limiting block; 72. Rack groove; 73. Gear groove; 74. Second rotating shaft; 75. Half-axle gear; 76. Extension block; 77. Abutment block; 78. Second through hole; 8. Clamping mechanism; 81. Second fixed block; 82. Second screw; 83. Chuck. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] See also Figure 1-Figure 11 The present application provides a connection structure between a metal pipe and a non-metal pipe, including a stainless steel pipe 1, a plastic pipe 2 and a connection mechanism 3. The stainless steel pipe 1 and the plastic pipe 2 are both movably inserted into the interior of the connection mechanism 3, and one end of the stainless steel pipe 1 is movably fitted with one end of the plastic pipe 2.

[0030] like Figure 1 and Figure 4As shown, a plurality of limiting grooves 11 are formed at one end of the stainless steel pipe 1 , and a plurality of racks 12 are fixedly mounted on an inner wall of one side of the limiting groove 11 .

[0031] Furthermore, in this embodiment, when the stainless steel pipe 1 is inserted into the connecting pipe 31, the limiting groove 11 is aligned with the limiting block 71 and inserted until the limiting groove 11 and the limiting block 71 form a whole. When the stainless steel pipe 1 moves, the rack 12 engages with the half-shaft gear 75, thereby causing the half-shaft gear 75 to rotate, and the abutment block 77 abuts against the other side of the limiting groove 11, thereby improving the stability of the connection between the stainless steel pipe 1 and the connecting pipe 31.

[0032] like Figure 2 and Figure 3 As shown, the connecting mechanism 3 includes a connecting pipe 31, a stainless steel pipe 1 and a plastic pipe 2 are movably inserted into the inside of the connecting pipe 31, retaining rings 32 are fixedly installed at both ends of the surface of the connecting pipe 31, and a fixing ring 33 is fixedly installed in the middle of the surface of the connecting pipe 31. A plurality of first through holes 331 are opened in the fixing ring 33 and the connecting pipe 31, fan-shaped grooves 332 are opened on both sides of the fixing ring 33 near the first through holes 331, symmetrical vertical grooves 333 are opened in the fixing ring 33 below the fan-shaped grooves 332, one end of the vertical groove 333 is fixedly connected to one end of the fan-shaped groove 332, and a positioning groove 334 is opened in the fixing ring 33 below the vertical groove 333.

[0033] In this embodiment, the stainless steel pipe 1 is further inserted from the left side of the connecting pipe 31, and the plastic pipe 2 is inserted from the right side of the connecting pipe 31, thereby completing the docking between the stainless steel pipe 1 and the connecting pipe 31. The setting of the two retaining rings 32 facilitates the clamping mechanism 8 to clamp the stainless steel pipe 1 and the plastic pipe 2. The setting of the fixing ring 33 is used for the inner wall pressing mechanism 6 to press the inner walls of the stainless steel pipe 1 and the plastic pipe 2, so that the connection between the stainless steel pipe 1 and the plastic pipe 2 is more stable. The setting of the first through hole 331 provides a moving space for the lifting and lowering of the pull rod 65. After the pull rod 65 rises, the pressing plate 61 fits with the inner walls of the stainless steel pipe 1 and the plastic pipe 2. The pull rod 65 is rotated, and the two first fixing blocks 651 rotate in the fan-shaped groove 332, so that the pull rod 65 remains in the rising state. The pressing plate 61 continues to press the inner walls of the stainless steel pipe 1 and the plastic pipe 2. The setting of the vertical groove 333 facilitates the two first fixing blocks 651 to follow the pull rod 65 to rise. The setting of the positioning groove 334 provides space for the lifting and lowering of the positioning ring 631 and the connecting rod 63.

[0034] The connecting mechanism 3 is rotatably connected to an outer wall pressing mechanism 4 for pressing the surface of the plastic pipe 2, a driving mechanism 5 is fixedly installed on the surface of the connecting mechanism 3, and the connecting mechanism 3 is slidably connected to an inner wall pressing mechanism 6 for pressing the inner walls of the stainless steel pipe 1 and the plastic pipe 2; like Figure 2 and Figure 5As shown, the outer wall pressing mechanism 4 includes four flip plates 41, which are rotatably connected to the inside of the connecting pipe 31, and a plurality of first protrusions 42 are fixedly mounted on the lower surface of the flip plates 41, and the first protrusions 42 are movably fitted with the surface of the plastic pipe 2.

[0035] Furthermore, in this embodiment, the flip plate 41 is initially in an inclined state. When the plastic pipe 2 is inserted into the connecting pipe 31 from the right side, the end squeezes the flip plate 41, and the flip plate 41 rotates from the inclined state to the horizontal state. At this time, the first protrusion 42 presses the surface of the plastic pipe 2, so that the plastic pipe 2 can be fixed inside the connecting pipe 31.

[0036] like Figure 2 and Figure 3 As shown, a first rotating shaft 43 and a torsion spring 44 are fixedly installed on both sides of the flip plate 41, the first rotating shaft 43 passes through the torsion spring 44, a plurality of flip grooves 45 are provided on the surface of the connecting pipe 31, the flip plate 41 is rotatably connected inside the flip groove 45, rotating shaft grooves 46 are provided on the inner walls on both sides of the flip groove 45, the first rotating shaft 43 is rotatably connected inside the rotating shaft groove 46, and the other end of the torsion spring 44 is fixedly connected to the inner wall of the rotating shaft groove 46.

[0037] In this embodiment, the first rotating shaft 43 is further provided so that the flip plate 41 can rotate inside the flip groove 45 . The torsion spring 44 is provided so that the flip plate 41 can be turned from a horizontal state back to an inclined state, waiting for the next use. The rotating shaft groove 46 provides space for the first rotating shaft 43 .

[0038] like Figure 2 and Figure 6 As shown, the driving mechanism 5 includes a motor 51, which is fixedly mounted on the surface of the right-side retaining ring 32. The output end of the motor 51 is transmission-connected with a first screw rod 52. A sliding ring 53 is threadedly connected on the surface of the first screw rod 52. The sliding ring 53 is slidably connected between the fixed ring 33 and the right-side retaining ring 32. The inner wall of the sliding ring 53 is movably fitted with the upper surface of the flip plate 41. A guide rod 54 is fixedly mounted between the fixed ring 33 and the right-side retaining ring 32. The sliding ring 53 is slidably connected to the surface of the guide rod 54.

[0039] Furthermore, in this embodiment, when the flip plate 41 is squeezed by the plastic pipe 2 and is in a horizontal state, the motor 51 is started, and the first screw 52 rotates at this time, and the sliding ring 53 moves between the fixed ring 33 and the right retaining ring 32 until it moves to the surface of the flip plate 41. The sliding ring 53 presses the flip plate 41 again, so that the first protrusion 42 can be stably pressed on the surface of the plastic pipe 2, so that the plastic pipe 2 is more stable when connected to the inside of the connecting pipe 31, and the setting of the guide rod 54 prevents the sliding ring 53 from shifting when moving.

[0040] like Figure 7As shown, the inner wall pressing mechanism 6 includes four groups of pressing plates 61, which are slidably connected to the inside of the connecting pipe 31, and a plurality of second protrusions 62 are fixedly installed on the surface of the pressing plate 61, and the second protrusions 62 are movably fitted with the inner walls of the stainless steel pipe 1 and the plastic pipe 2.

[0041] In this embodiment, the inner wall pressing mechanism 6 presses the inner wall of the connection between the stainless steel pipe 1 and the plastic pipe 2 together, thereby improving the stability of the connection between the stainless steel pipe 1 and the plastic pipe 2. When one end of the stainless steel pipe 1 is connected to one end of the plastic pipe 2 inside the connecting pipe 31, the pull rod 65 is pulled upward, and the pressing plate 61 is able to rise through the connection of the connecting rod 63 until the upper surface of the pressing plate 61 fits with the inner wall of the connection between the stainless steel pipe 1 and the plastic pipe 2. The second protrusion 62 increases the friction between the pressing plate 61 and the inner wall of the stainless steel pipe 1 and the plastic pipe 2, thereby improving the stability of the connection between the stainless steel pipe 1 and the plastic pipe 2, and at the same time improving the stability of the connection between the connecting pipe 31 and the stainless steel pipe 1 and the plastic pipe 2.

[0042] like Figure 2 , Figure 7 and Fig.11 As shown, a connecting rod 63 is fixedly installed on the surface of the pressing plate 61, a positioning ring 631 is fixedly installed on the end of the connecting rod 63, a spring 632 is fixedly installed on the surface of the positioning ring 631, the other end of the spring 632 is fixedly connected to the inner wall of the positioning groove 334, a rotating block 64 is rotatably connected inside the positioning ring 631, a pull rod 65 is fixedly installed on the surface of the rotating block 64, the pull rod 65 passes through the spring 632, a symmetrical first fixed block 651 is fixedly installed on the surface of the pull rod 65, the connecting rod 63 and the positioning ring 631 are both slidably connected inside the positioning groove 334, the pull rod 65 is slidably connected inside the first through hole 331, the first fixed block 651 is slidably connected inside the vertical groove 333, and the first fixed block 651 is rotatably connected inside the fan-shaped groove 332.

[0043] Furthermore, in this embodiment, when it is necessary to move the pressing plate 61, the pull rod 65 is pulled upward, and the first fixed block 651 rises inside the vertical groove 333. The rising of the pull rod 65 drives the rotating block 64 to rise, and the rotating block 64 rotates inside the positioning ring 631, thereby driving the positioning ring 631 to rise inside the positioning groove 334. The positioning ring 631 is connected to the connecting rod 63, thereby driving the pressing plate 61 to rise inside the connecting pipe 31 until it fits with the connection between the stainless steel pipe 1 and the plastic pipe 2. At this time, the pull rod 65 is rotated, and the two first fixed blocks 651 rotate inside the fan-shaped groove 332 until they rotate to the other side of the fan-shaped groove 332, so that the pull rod 65 remains in an ascending state, so that the pressing plate 61 can continue to press the connection between the stainless steel pipe 1 and the plastic pipe 2.

[0044] An abutment mechanism 7 for fixing the stainless steel pipe 1 is fixedly installed inside the connection mechanism 3 , and clamping mechanisms 8 for clamping the stainless steel pipe 1 and the plastic pipe 2 are fixedly installed on both sides of the connection mechanism 3 .

[0045] like Figure 2 , Figure 8 and Fig. 9 As shown, the abutment mechanism 7 includes four groups of limit blocks 71, the limit blocks 71 are fixedly mounted on the inner wall of the connecting pipe 31, the limit blocks 71 are slidably connected inside the limit groove 11, a rack groove 72 is provided on one side of the limit block 71, the rack 12 is slidably connected inside the rack groove 72, a plurality of gear grooves 73 are provided inside the limit block 71, a second rotating shaft 74 is rotatably connected inside the gear groove 73, a half-shaft gear 75 is fixedly mounted on the surface of the second rotating shaft 74, the half-shaft gear 75 is movably meshed with the rack 12, an extension block 76 is fixedly mounted on the surface of the half-shaft gear 75, one end of the extension block 76 is rotatably connected with an abutment block 77, the abutment block 77 is movably fitted with the inner wall of the other side of the limit groove 11, a second through hole 78 is provided at one end of the limit block 71, and the connecting rod 63 is slidably connected inside the second through hole 78.

[0046] Further, in this embodiment, after the limiting groove 11 is aligned with the limiting block 71, the stainless steel pipe 1 is inserted from the left side of the connecting pipe 31, and the rack 12 moves inside the rack groove 72 until it engages with the half-shaft gear 75. The half-shaft gear 75 rotates, driving the extension block 76 and the abutment block 77 to rotate. The abutment block 77 rotates until it fits with the inner wall on the other side of the limiting groove 11, thereby squeezing the stainless steel pipe 1, further improving the stability of the connection between the stainless steel pipe 1 and the connecting pipe 31. The gear groove 73 is set to provide space for the rotation of the half-shaft gear 75, and the second through hole 78 is set to provide space for the rise of the connecting rod 63.

[0047] like Figure 2 and Fig.10 As shown, the clamping mechanism 8 includes a second fixed block 81, which is fixedly mounted on the surfaces of the two retaining rings 32. The internal thread of the second fixed block 81 is connected to a second screw 82, and the end of the second screw 82 is rotatably connected to a chuck 83, which is movably fitted with the surfaces of the stainless steel pipe 1 and the plastic pipe 2.

[0048] In this embodiment, the second fixing block 81 supports the clamping mechanism 8. When the stainless steel pipe 1 and the plastic pipe 2 are inserted into the connecting pipe 31, the second screw 82 is rotated. The second screw 82 moves and drives the clamp 83 to move to the surface of the stainless steel pipe 1 and the plastic pipe 2 to perform secondary fixation on the stainless steel pipe 1 and the plastic pipe 2, thereby further improving the stability of the connection between the stainless steel pipe 1 and the plastic pipe 2 inside the connecting pipe 31.

[0049] The working principle of this embodiment is as follows. When in use, the staff inserts the stainless steel pipe 1 from the left side of the connecting pipe 31 and the plastic pipe 2 from the right side of the connecting pipe 31. When the plastic pipe 2 is inserted, the end squeezes the flip plate 41, and the flip plate 41 rotates from an inclined state to a horizontal state. At this time, the first protrusion 42 presses the surface of the plastic pipe 2, so that the plastic pipe 2 can be fixed inside the connecting pipe 31. After the limiting groove 11 is aligned with the limiting block 71, the stainless steel pipe 1 is inserted from the left side of the connecting pipe 31, and the rack 12 moves inside the rack groove 72 until it meshes with the half-shaft gear 75. The half-shaft gear 75 rotates, driving the extension block 76 and the abutment block 77 to rotate. The abutment block 77 rotates to fit the inner wall on the other side of the limiting groove 11, squeezing the stainless steel pipe 1, so that the stainless steel pipe 1 can be fixed inside the connecting pipe 31. When one end of the stainless steel pipe 1 is connected to one end of the plastic pipe 2 inside the connecting pipe 31, pull the pull upward. The rod 65 and the first fixed block 651 rise inside the vertical groove 333. The rise of the pull rod 65 drives the rotating block 64 to rise. The rotating block 64 rotates inside the positioning ring 631, thereby driving the positioning ring 631 to rise inside the positioning groove 334. The positioning ring 631 is connected to the connecting rod 63, thereby driving the pressing plate 61 to rise inside the connecting pipe 31 until it fits with the connection between the stainless steel pipe 1 and the plastic pipe 2. At this time, the pull rod 65 is rotated, and the two first fixed blocks 651 rotate inside the fan-shaped groove 332 until they rotate to the other side of the fan-shaped groove 332, so that the pull rod 65 remains in an ascending state, so that the pressing plate 61 can continue to press the connection between the stainless steel pipe 1 and the plastic pipe 2. Finally, the second screw 82 is rotated. The second screw 82 moves and drives the chuck 83 to move to the surface of the stainless steel pipe 1 and the plastic pipe 2 to perform secondary fixation on the stainless steel pipe 1 and the plastic pipe 2, thereby further improving the stability of the connection between the stainless steel pipe 1 and the plastic pipe 2 inside the connecting pipe 31.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A connection structure of a metal pipe and a non-metal pipe, comprising a stainless steel pipe (1), a plastic pipe (2) and a connection mechanism (3), characterized in that: The stainless steel pipe (1) and the plastic pipe (2) are both movably inserted into the interior of the connection mechanism (3), one end of the stainless steel pipe (1) is movably fitted with one end of the plastic pipe (2), and further comprises: The connecting mechanism (3) is rotatably connected to an outer wall pressing mechanism (4) for pressing the surface of the plastic pipe (2); a driving mechanism (5) is fixedly mounted on the surface of the connecting mechanism (3); and the connecting mechanism (3) is slidably connected to an inner wall pressing mechanism (6) for pressing the inner walls of the stainless steel pipe (1) and the plastic pipe (2); An abutment mechanism (7) for fixing the stainless steel pipe (1) is fixedly installed inside the connection mechanism (3), and clamping mechanisms (8) for clamping the stainless steel pipe (1) and the plastic pipe (2) are fixedly installed on both sides of the connection mechanism (3).

2. A connection structure between a metal pipe and a non-metal pipe according to claim 1, characterized in that: A plurality of limiting grooves (11) are formed at one end of the stainless steel pipe (1), and a plurality of racks (12) are fixedly mounted on an inner wall of one side of the limiting groove (11).

3. The connection structure of a metal pipe and a non-metal pipe according to claim 2, characterized in that: The connecting mechanism (3) comprises a connecting pipe (31), the stainless steel pipe (1) and the plastic pipe (2) are movably inserted into the connecting pipe (31), retaining rings (32) are fixedly installed at both ends of the surface of the connecting pipe (31), a fixing ring (33) is fixedly installed in the middle of the surface of the connecting pipe (31), a plurality of first through holes (331) are provided in the fixing ring (33) and the connecting pipe (31), fan-shaped grooves (332) are provided in the fixing ring (33) on both sides close to the first through holes (331), symmetrical vertical grooves (333) are provided in the fixing ring (33) below the fan-shaped grooves (332), one end of the vertical grooves (333) is fixedly connected to one end of the fan-shaped grooves (332), and a positioning groove (334) is provided in the fixing ring (33) below the vertical grooves (333).

4. The connection structure of a metal pipe and a non-metal pipe according to claim 3, characterized in that: The outer wall pressing mechanism (4) comprises four flip plates (41), the flip plates (41) being rotatably connected to the inside of the connecting pipe (31), a plurality of first protrusions (42) being fixedly mounted on the lower surface of the flip plates (41), the first protrusions (42) being movably fitted to the surface of the plastic pipe (2).

5. The connection structure of a metal pipe and a non-metal pipe according to claim 4, characterized in that: A first rotating shaft (43) and a torsion spring (44) are fixedly mounted on both sides of the flip plate (41); the first rotating shaft (43) passes through the interior of the torsion spring (44); a plurality of flip grooves (45) are provided on the surface of the connecting pipe (31); the flip plate (41) is rotatably connected inside the flip groove (45); rotating shaft grooves (46) are provided on the inner walls on both sides of the flip groove (45); the first rotating shaft (43) is rotatably connected inside the rotating shaft groove (46); and the other end of the torsion spring (44) is fixedly connected to the inner wall of the rotating shaft groove (46).

6. The connection structure of a metal pipe and a non-metal pipe according to claim 4, characterized in that: The driving mechanism (5) comprises a motor (51), the motor (51) being fixedly mounted on the surface of the right retaining ring (32), the output end of the motor (51) being drivingly connected to a first screw rod (52), the surface of the first screw rod (52) being threadedly connected to a sliding ring (53), the sliding ring (53) being slidably connected between the fixed ring (33) and the right retaining ring (32), the inner wall of the sliding ring (53) being movably fitted to the upper surface of the flip plate (41), a guide rod (54) being fixedly mounted between the fixed ring (33) and the right retaining ring (32), the sliding ring (53) being slidably connected to the surface of the guide rod (54).

7. The connection structure of a metal pipe and a non-metal pipe according to claim 3, characterized in that: The inner wall pressing mechanism (6) comprises four groups of pressing plates (61), the pressing plates (61) being slidably connected to the inside of the connecting pipe (31), a plurality of second protrusions (62) being fixedly mounted on the surface of the pressing plates (61), the second protrusions (62) being movably fitted to the inner walls of the stainless steel pipe (1) and the plastic pipe (2).

8. The connection structure of a metal pipe and a non-metal pipe according to claim 7, characterized in that: A connecting rod (63) is fixedly mounted on the surface of the pressing plate (61), a positioning ring (631) is fixedly mounted on the end of the connecting rod (63), a spring (632) is fixedly mounted on the surface of the positioning ring (631), the other end of the spring (632) is fixedly connected to the inner wall of the positioning groove (334), a rotating block (64) is rotatably connected inside the positioning ring (631), a pull rod (65) is fixedly mounted on the surface of the rotating block (64), the pull rod (65) passes through the spring (632), a symmetrical first fixed block (651) is fixedly mounted on the surface of the pull rod (65), the connecting rod (63) and the positioning ring (631) are both slidably connected inside the positioning groove (334), the pull rod (65) is slidably connected inside the first through hole (331), the first fixed block (651) is slidably connected inside the vertical groove (333), and the first fixed block (651) is rotatably connected inside the fan-shaped groove (332).

9. The connection structure of a metal pipe and a non-metal pipe according to claim 8, characterized in that: The abutting mechanism (7) comprises four groups of limit blocks (71), the limit blocks (71) being fixedly mounted on the inner wall of the connecting pipe (31), the limit blocks (71) being slidably connected inside the limit groove (11), a rack groove (72) being provided on one side of the limit block (71), the rack (12) being slidably connected inside the rack groove (72), a plurality of gear grooves (73) being provided inside the limit block (71), a second rotating shaft (74) being rotatably connected inside the gear groove (73), and the second rotating shaft (74) being rotatably connected inside the gear groove (73). A half-axle gear (75) is fixedly mounted on the surface of the shaft (74), the half-axle gear (75) is movably meshed with the rack (12), an extension block (76) is fixedly mounted on the surface of the half-axle gear (75), one end of the extension block (76) is rotatably connected to an abutment block (77), the abutment block (77) is movably fitted with the inner wall of the other side of the limiting groove (11), a second through hole (78) is opened at one end of the limiting block (71), and the connecting rod (63) is slidably connected inside the second through hole (78).

10. The connection structure of a metal pipe and a non-metal pipe according to claim 3, characterized in that: The clamping mechanism (8) comprises a second fixing block (81), the second fixing block (81) being fixedly mounted on the surfaces of the two retaining rings (32), the second fixing block (81) being internally threadedly connected to a second screw rod (82), the end of the second screw rod (82) being rotatably connected to a chuck (83), the chuck (83) being movably fitted to the surfaces of the stainless steel pipe (1) and the plastic pipe (2).

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