Fluoroplastic anti-retreating limiting sleeve for fluoroplastic steel welding

Abstract

The invention relates to the field of fluoroplastic steel, in particular to a fluoroplastic anti-retreating limiting sleeve for fluoroplastic steel welding. The technical problem to be solved is that the thermal expansion coefficients of fluoroplastic and steel are different, relative displacement between the fluoroplastic and the steel is possibly caused by temperature change in the welding process, and therefore the sealing performance and strength of a welding joint are affected. A welding joint is a stress concentration area, and if the treatment is improper, the stress concentration is easy to cause the cracking or leakage of the joint; if the problems of poor fusion, air holes, slag inclusion and the like occur in the welding process, the quality of a welding joint can be reduced. Comprising a fluoroplastic steel pipe, a stainless steel base pipe is fixedly connected to the inner side of the fluoroplastic steel pipe, and an anti-retreating limiting sleeve is arranged at the end of the fluoroplastic steel pipe. By arranging the anti-retreating limiting sleeve, a wrench is used for twisting the rotating ring, the rotating ring rotates to drive the rotating sleeve to rotate towards one side along the threads, the rotating sleeve drives the pressing sleeve to rotate towards one side, and the pressing sleeve rotates towards one side to extrude the locking claw.

Description

Technical Field

[0001] The invention relates to the field of fluoroplastic steel, in particular to a fluoroplastic anti-retraction limiting sleeve for fluoroplastic steel welding. Background Art

[0002] As a new type of polymer material, fluoroplastic steel has excellent corrosion resistance, high temperature resistance, aging resistance and other properties, so it has been widely used in many fields. In the field of construction, fluoroplastic steel is often used in water supply and drainage pipes, water treatment equipment and outdoor facilities of buildings due to its excellent corrosion resistance and aging resistance. The application of fluoroplastic steel ensures the stability and durability of internal and external facilities of buildings and prolongs their service life.

[0003] The main connection methods between fluoroplastic steel pipes include flange connection, mechanical connection, welding joint connection, etc. The welding joint connection is mainly used for diversion or confluence pipeline systems that require high strength and excellent sealing. In the prior art, due to the difference in thermal expansion coefficients between fluoroplastics and steel, the temperature change may cause relative displacement between the two during the welding process, thereby affecting the sealing and strength of the welded joint; the welded joint is an area of ​​stress concentration. If it is not handled properly, the stress concentration is likely to cause cracking or leakage of the joint; if problems such as poor fusion, pores, slag inclusions, etc. occur during the welding process, the quality of the welded joint will be reduced. Summary of the invention

[0004] (1) Technical issues to be resolved In order to overcome the difference in thermal expansion coefficients between fluoroplastics and steel, the present invention may cause relative displacement between the two due to temperature changes during welding, thereby affecting the sealing and strength of the welded joint; the welded joint is an area of ​​stress concentration, and if not handled properly, the stress concentration can easily lead to cracking or leakage of the joint; if problems such as poor fusion, pores, slag inclusions, etc. occur during welding, the quality of the welded joint will be reduced. The technical problem to be solved by the present invention is to provide a fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding.

[0005] (2) Technical solution In order to solve the above technical problems, the present invention provides a fluoroplastic anti-retreat limit sleeve for fluoroplastic steel welding, comprising a fluoroplastic steel pipe, a stainless steel base pipe is fixedly connected to the inner side of the fluoroplastic steel pipe, the anti-retreat limit sleeve is arranged at the end of the fluoroplastic steel pipe, a locking mechanism is arranged on the side of the anti-retreat limit sleeve, a pushing mechanism is arranged on the lower side of the locking mechanism, a supporting mechanism is arranged on the lower side of the pushing mechanism, a fixing mechanism is arranged on the other end of the supporting mechanism, adjusting mechanisms are arranged on both sides of the fixing mechanism, a heating mechanism is arranged on the side of the supporting mechanism, and a cross-section cleaning mechanism is arranged on one side of the heating mechanism. The anti-retraction limit sleeve includes a sliding ring, the outer side surface of the sliding ring is hexagonal, the sliding ring is slidably connected to the outer side surface of the fluoroplastic steel pipe, the side of the sliding ring is fixedly connected with a sliding sleeve, one end of the sliding sleeve is fixedly connected with a plurality of locking claws at intervals of 30 degrees, a plurality of rectangular through grooves are provided at intervals of 60 degrees in the middle of the sliding sleeve, a pressure plate is fixedly connected in the through groove, a locking plate is fixedly connected to the inner side surface of the other end of the pressure plate, the cross-section of the locking plate is arc-shaped, a thread is provided on the arc-shaped outer side surface of the sliding sleeve, and a thread groove connected to the thread of the sliding sleeve is provided on the outer surface of the pressure plate.

[0006] Preferably, the anti-retreat limit sleeve also includes multiple positioning pins, one end of the positioning pin is fixedly connected to the side of the sliding ring, the other end of the positioning pin is slidably connected to a fixing ring, a sliding groove is provided on the outer side of the fixing ring, a limiting ring is slidably connected in the sliding groove, an arc-shaped sliding groove is provided on the side of the other end of the positioning pin, the limiting ring is slidably connected in the arc-shaped sliding groove of the positioning pin, the inner side surface of the limiting ring is provided with arc-shaped sliding grooves at intervals of 90 degrees, the diameter of the arc-shaped sliding grooves is consistent with the diameter of the positioning pin, and the outer side surface of the limiting ring is symmetrically fixedly connected to the limiting handle.

[0007] Preferably, the anti-retraction limit sleeve also includes a rotating sleeve, the inner side surface of the rotating sleeve is provided with a thread matching the thread of the sliding sleeve, the rotating sleeve is rotatably connected to the sliding sleeve via a thread, one end of the rotating sleeve is fixedly connected to a rotating ring, the outer side surface of the rotating ring is hexagonal, the other end of the rotating sleeve is fixedly connected to the inner side surface of a clamping sleeve, and the cross-section of the clamping sleeve is triangular.

[0008] Preferably, the locking mechanism includes a plurality of slips, the slips are slidably connected to the fluoroplastic steel pipe, the slips are slidably connected to the positioning pin, the arcuate outer side of the slip is fixedly connected to a T-shaped block, the outer side of the T-shaped block is slidably connected to another piece of the slip, a countersunk hole is opened in the middle of the slip, a positioning screw is slidably connected in the countersunk hole, the positioning screw passes through the slip and the end is threadedly connected to an upper locking frame.

[0009] Preferably, the locking mechanism also includes a lower locking frame, which is rotatably connected to the upper locking frame via a rotating shaft, the other end of the lower locking frame is rotatably connected to a locking block via a rotating shaft, the upper surface of the locking block is fixedly connected to a locking column, the other end of the upper locking frame is provided with an elliptical groove, the locking column is slidably connected to the elliptical groove of the upper locking frame, and the outer side surface of the locking column is threadedly connected to a locking nut.

[0010] Preferably, the supporting mechanism includes a sliding shaft, which is slidably connected to the lower locking frame, a plurality of baffles are fixedly connected to the outer side of the sliding shaft, a bracket is fixedly connected to the lower surface of the baffle, the lower ends of the plurality of baffles are fixedly connected to two supporting shafts, a guide rail is fixedly connected between the two supporting shafts, two isolation blocks are fixedly connected to the side of the bracket, the other end of the lower locking frame is slidably connected to an auxiliary shaft, and both ends of the auxiliary shaft are fixedly connected to the baffle.

[0011] Preferably, the adjustment mechanism includes an adjustment shaft, both ends of the adjustment shaft are fixedly connected to the baffle, the outer side of the adjustment shaft is provided with a fixing mechanism slidably connected thereto, the fixing mechanism has the same structure as the locking mechanism, both sides of the fixing mechanism are threadedly connected with adjustment screws, the outer side of the adjustment screw is slidably connected with an adjustment frame, a plurality of circular through holes are provided on the adjustment frame, and both ends of the adjustment frame are fixedly connected to the baffle.

[0012] Preferably, the pushing mechanism includes two pushing motors, the pushing motors are fixedly connected to the upper surface of the bracket, the output end of the pushing motor is fixedly connected to a pushing shaft, the outer side of the pushing shaft is rotatably connected to a guide block, the other end of the guide block is fixedly connected to the bracket, the outer side of the pushing shaft is threadedly connected to a pushing block, and the pushing block is fixedly connected to the lower locking frame.

[0013] Preferably, the cross-section cleaning mechanism includes a sliding block, the sliding block is rotatably connected to the sliding shaft, the side of the sliding block is fixedly connected to a shell, the shell is slidably connected to the isolation block, the other side of the shell is fixedly connected to a cleaning handle, the side of one end of the shell is fixedly connected to a cleaning motor, the output end of the cleaning motor passes through the shell and is fixedly connected to a driving pulley on the outside of the shell, the other end of the shell is rotatably connected to two ring cutters via a rotating shaft, a driven pulley is fixedly connected to the outside of the rotating shaft located inside the shell, and a power belt is sleeved on the driving pulley and the driven pulley.

[0014] Preferably, the heating mechanism includes a rotating plate, the rotating plate is rotatably connected to the sliding shaft, a heating frame is fixedly connected to the side of the rotating plate, the heating frame is slidably connected to the isolation block, a heating handle is fixedly connected to the side of the heating frame, a heating tile is fixedly connected to the side of the heating frame, and one end of the heating frame is fixedly connected to a support column.

[0015] (3) Beneficial effects 1. By setting an anti-retraction limit sleeve, use a wrench to twist the rotating ring, the rotating ring rotates to drive the rotating sleeve to rotate to one side along the thread, the rotating sleeve drives the pressing sleeve to rotate to one side, the pressing sleeve rotates to one side to squeeze the locking claw, the locking claw contacts the fluoroplastic steel pipe, the rotating sleeve rotates to one side along the thread to squeeze the pressing plate, the pressing plate moves toward the fluoroplastic steel pipe to drive the locking plate to contact the fluoroplastic steel pipe, prevent the fluoroplastic layer of the fluoroplastic steel pipe from shifting during welding, and ensure the sealing and strength of the fluoroplastic steel pipe; 2. By setting the locking mechanism and the fixing mechanism, the locking nut is rotated, the locking nut is disengaged from the upper locking frame, the locking column is pulled to rotate 90 degrees to one side with the rotating shaft at the end of the locking block as the center, and the upper locking frame is rotated 90 degrees with the rotating shaft at the end as the center, and the fluoroplastic steel pipe is placed on the slip of the lower locking frame, the upper locking frame is reset, the locking column is pushed to reset, and the locking nut is rotated to contact the upper locking frame to eliminate the stress generated during the welding of the fluoroplastic steel pipe and prevent cracking or leakage at the welding point; 3. By setting up a cross-section cleaning mechanism, under the action of the power belt, the rotation of the active pulley drives the driven pulley to rotate, the rotation of the driven pulley drives the internal rotating shaft to rotate, the rotation of the rotating shaft drives the ring cutters at both ends to rotate, and the welding end face of the fluoroplastic steel pipe is cleaned to prevent problems such as pores and slag inclusions, thereby ensuring the quality of the welded joint; by setting up a pushing mechanism, the output end of the pushing motor rotates to drive the pushing shaft to rotate, and the rotation of the pushing shaft drives the pushing block to reciprocate horizontally, thereby avoiding poor fusion problems during welding and improving the quality of the welded joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the locking mechanism structure of the present invention; Figure 3 It is a schematic diagram of the structure of the anti-retraction limiting sleeve of the present invention; Figure 4 is a cross-sectional view of a sliding ring of the present invention; Figure 5 is a cross-sectional view of a fixing ring of the present invention; Figure 6 is a cross-sectional view of a rotating ring of the present invention; Figure 7 is a cross-sectional view of the slip of the present invention; Figure 8 It is a schematic diagram of the support mechanism structure of the present invention; Fig. 9 is a cross-sectional view of the housing of the present invention; Fig.10 It is a schematic diagram of the heating mechanism structure of the present invention.

[0017] The marks in the attached drawings are: 1-fluoroplastic steel pipe, 2-locking mechanism, 201-upper locking frame, 202-lower locking frame, 203-slip, 204-locking column, 205-locking nut, 206-locking block, 207-positioning screw, 208-pushing block, 3-fixing mechanism, 4-section cleaning mechanism, 401-cleaning motor, 402-cleaning handle, 403-driving pulley, 404-power belt, 405-driven pulley, 406-ring knife, 407-sliding block, 408-housing, 5-heating mechanism, 501-heating handle, 502-heating frame, 503-heating tile, 504-support column, 505-rotating plate, 6- Anti-retreat limit sleeve, 601-limit handle, 602-limit ring, 603-fixing ring, 604-locating pin, 605-sliding ring, 606-rotating ring, 607-rotating sleeve, 608-pressing sleeve, 609-sliding sleeve, 610-pressure plate, 611-locking plate, 612-locking claw, 7-driving mechanism, 701-driving motor, 702-driving shaft, 703-guide block, 8-adjusting mechanism, 801-adjusting screw, 802-adjusting frame, 803-adjusting shaft, 9-supporting mechanism, 901-bracket, 902-baffle, 903-auxiliary shaft, 904-sliding shaft, 905-support shaft, 906-guide rail, 907-isolation block. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] Example 1 A fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding, such as Figure 1-Figure 5As shown, it includes a fluoroplastic steel pipe 1, the inner side of the fluoroplastic steel pipe 1 is a stainless steel base pipe, and the outer side of the stainless steel base pipe is provided with a fluoroplastic layer. The fluoroplastic steel pipe 1 is usually composed of a fluoroplastic layer and a stainless steel base pipe. In this composite structure, the stainless steel base pipe is located on the inner side to provide strength and corrosion resistance, while the fluoroplastic layer is located on the outer side to provide excellent properties such as chemical resistance, high temperature resistance and low friction coefficient. An anti-retreat limit sleeve 6 is provided at the end of the fluoroplastic steel pipe 1. By providing the anti-retreat limit sleeve 6, relative displacement between the fluoroplastic layer and the stainless steel base pipe due to temperature changes during welding is avoided. A locking mechanism 2 is provided on the side of the anti-retreat limit sleeve 6. By providing the locking mechanism 2, the stress generated during the welding of the fluoroplastic steel pipe is eliminated to prevent cracking or leakage of the joint at the welding point. A pushing mechanism 7 is provided on the lower side of the locking mechanism 2. By providing the pushing mechanism 7, it is helpful to reduce welding overheating. Defects and mistakes in the process are eliminated, making the welding joint more flat, smooth and defect-free, thereby improving the overall performance and reliability of the pipeline system. A supporting mechanism 9 is arranged on the lower side of the pushing mechanism 7. By arranging the supporting mechanism 9, the overall weight is reduced, which is convenient for changing the site. A fixing mechanism 3 is arranged on the other end of the supporting mechanism 9. The locking mechanism 2 is consistent with the internal structure of the fixing mechanism 3. Adjusting mechanisms 8 are arranged on both sides of the fixing mechanism 3. By arranging the adjusting mechanism 8, it is used to adapt to fluoroplastic steel pipes 1 of different diameters. A heating mechanism 5 is arranged on the side of the supporting mechanism 9. By arranging the heating mechanism 5, the connection strength of the outer fluoroplastic layer is high, the sealing is good, and the appearance is beautiful. A cross-section cleaning mechanism 4 is arranged on one side of the heating mechanism 5. By arranging the cross-section cleaning mechanism 4, the welding end face of the fluoroplastic steel pipe 1 is polished to remove dirt, oxide layer and burrs, so that the surface is smooth and convenient for welding.

[0020] The anti-retraction limit sleeve 6 includes a sliding ring 605, the outer side surface of the sliding ring 605 is hexagonal, the sliding ring 605 is slidably connected to the outer side surface of the fluoroplastic steel pipe 1, the side of the sliding ring 605 is fixedly connected with a sliding sleeve 609, one end of the sliding sleeve 609 is fixedly connected with a plurality of locking claws 612 at intervals of 30 degrees, six rectangular through grooves are opened at intervals of 60 degrees in the middle of the sliding sleeve 609, and a pressing plate 610 is fixedly connected in the through groove. The pressing plate 610 is made of elastic material, one end of the pressing plate 610 is flush with the sliding sleeve 609, and the other end of the pressing plate 610 is higher than the outer side surface of the sliding sleeve 609, and the inner side surface of the other end of the pressing plate 610 is fixedly connected with a locking plate 611, and the cross-section of the locking plate 611 is arc-shaped, and the arc-shaped outer side surface of the sliding sleeve 609 is provided with a thread, and the outer side surface of the pressing plate 610 is provided with a locking claw 612 that is connected to the sliding sleeve The movable sleeve 609 is threadedly connected to a threaded groove, and the other side of the sliding ring 605 is fixedly connected with four positioning pins 604. The other end of the positioning pin 604 is slidably connected with a fixed ring 603. A sliding groove is provided on the outer side of the fixed ring 603, and a limit ring 602 is slidably connected in the sliding groove. The outer side surface of the positioning pin 604 located inside the sliding groove of the fixed ring 603 is provided with an arc-shaped sliding groove. The limit ring 602 is slidably connected in the arc-shaped sliding groove of the positioning pin 604. The inner side surface of the limit ring 602 is provided with arc-shaped sliding grooves at intervals of 90 degrees. The diameter of the arc-shaped sliding groove is consistent with the diameter of the positioning pin 604. When the arc-shaped sliding groove on the inner side of the limit ring 602 is rotated to the same position as the positioning pin 604, the limit ring 602 can release the lock on the positioning pin 604, and the outer side surface of the limit ring 602 is symmetrically fixedly connected with two limit handles 601.

[0021] like Figure 6 As shown, the anti-retraction limit sleeve 6 also includes a rotating sleeve 607. The inner side surface of the rotating sleeve 607 is provided with a thread that matches the thread of the sliding sleeve 609. The rotating sleeve 607 is rotatably connected to the sliding sleeve 609 through a thread. One end of the rotating sleeve 607 is fixedly connected to a rotating ring 606, and the outer side surface of the rotating ring 606 is hexagonal. The inner side surface of the other end of the rotating sleeve 607 is fixedly connected to a clamping sleeve 608, and the cross-section of the clamping sleeve 608 is triangular.

[0022] like Figure 2 , Figure 7As shown, the locking mechanism 2 includes a plurality of slips 203, which are slidably connected to the fluoroplastic steel pipe 1, and a through hole corresponding to the positioning pin 604 is opened on the slip 203, and the positioning pin 604 is slidably connected in the through hole opened on the slip 203. The arc-shaped outer side surface of the slip 203 is fixedly connected with a T-shaped block, and the outer side of the T-shaped block is slidably connected with another slip 203. The plurality of slips 203 are slidably connected in this way, and a countersunk hole is opened in the middle of the slip 203, and a positioning screw 207 is slidably connected in the countersunk hole, and the plurality of slips 203 are fixedly connected with the T-shaped block by the positioning screw 207. 03 fixed connection, the positioning screw 207 passes through the cava 203 and the end is connected to the upper locking frame 201 by a thread, one end of the upper locking frame 201 is rotatably connected to the lower locking frame 202 by a rotating shaft, the other end of the lower locking frame 202 is rotatably connected to the locking block 206 by a rotating shaft, the upper surface of the locking block 206 is fixedly connected to the locking column 204, the other end of the upper locking frame 201 is provided with an elliptical groove, the locking column 204 is slidably connected in the elliptical groove of the upper locking frame 201, and the outer side surface of the locking column 204 is connected to the locking nut 205 by a thread.

[0023] like Figure 8 As shown, the support mechanism 9 includes a sliding shaft 904, which is slidably connected to the lower locking frame 202, a plurality of baffles 902 are fixedly connected to the outer side of the sliding shaft 904, a bracket 901 is fixedly connected to the lower surface of the baffle 902, two support shafts 905 are fixedly connected to the lower ends of the plurality of baffles 902, a guide rail 906 is fixedly connected between the two support shafts 905, two isolation blocks 907 are fixedly connected to the side of the bracket 901, and an auxiliary shaft 903 is slidably connected to the other end of the lower locking frame 202, and both ends of the auxiliary shaft 903 are fixedly connected to the baffle 902.

[0024] like Figure 8 As shown, the adjustment mechanism 8 includes an adjustment shaft 803, both ends of the adjustment shaft 803 are fixedly connected to the baffle 902, a fixing mechanism 3 is arranged on the outer side of the adjustment shaft 803, the fixing mechanism 3 has the same structure as the locking mechanism 2, both sides of the fixing mechanism 3 are threadedly connected with adjustment screws 801, the outer side of the adjustment screw 801 is slidably connected with an adjustment frame 802, a plurality of circular through holes are opened on the adjustment frame 802, and both ends of the adjustment frame 802 are fixedly connected to the baffle 902.

[0025] like Figure 8 As shown, the pushing mechanism 7 includes two pushing motors 701, the pushing motor 701 is fixedly connected to the upper surface of the bracket 901, the output end of the pushing motor 701 is fixedly connected to the pushing shaft 702, the outer side of the pushing shaft 702 is rotatably connected to the guide block 703, the other end of the guide block 703 is fixedly connected to the bracket 901, the outer side of the pushing shaft 702 is threadedly connected to the pushing block 208, and the pushing block 208 is fixedly connected to the lower locking frame 202.

[0026] like Fig. 9 As shown, the cross-section cleaning mechanism 4 includes a sliding block 407, which is rotatably connected to the sliding shaft 904, a shell 408 is fixedly connected to the side of the sliding block 407, the shell 408 is slidably connected to the isolation block 907, a cleaning handle 402 is fixedly connected to the other side of the shell 408, a cleaning motor 401 is fixedly connected to the side of one end of the shell 408, an output end of the cleaning motor 401 passes through the shell 408 and is located on the outside of the shell 408 and is fixedly connected to a driving pulley 403, the other end of the shell 408 is rotatably connected to two ring cutters 406 through a rotating shaft, the rotating shaft is located on the outside of the shell 408 and is fixedly connected to a driven pulley 405, and a power belt 404 is sleeved on the driving pulley 403 and the driven pulley 405.

[0027] like Fig.10 As shown, the heating mechanism 5 includes a rotating plate 505, which is rotatably connected to the sliding shaft 904, a heating frame 502 is fixedly connected to the side of the rotating plate 505, the heating frame 502 is slidably connected to the isolation block 907, a heating handle 501 is fixedly connected to the side of the heating frame 502, a heating tile 503 is fixedly connected to the side of the heating frame 502, and one end of the heating frame 502 is fixedly connected to a support column 504.

[0028] Example 2 Working principle: When welding two fluoroplastic steel pipes 1, adjust the number of slips 203 on the inner side of the locking mechanism 2 and the fixing mechanism 3 according to the diameter of the pipe, select the positioning screw 207 of appropriate length according to the number of slips 203, use the adjusting mechanism 8 to adjust the position of the fixing mechanism 3, clamp the fluoroplastic steel pipe 1 through the locking mechanism 2 and the fixing mechanism 3, install the anti-retraction limit sleeve 6 at the end of the fluoroplastic steel pipe 1, and then rotate the cross-section cleaning mechanism 4 180 degrees with the sliding shaft 904 as the center to contact the guide rail 906, start the pushing mechanism 7, and the pushing mechanism 7 pushes the locking mechanism 2 to move toward the fixing mechanism 3. After the two fluoroplastic steel pipes 1 contact the cross-section cleaning mechanism 4, the pushing mechanism 7 is closed, and the cross-section cleaning mechanism 4 cleans the end surface of the fluoroplastic steel pipe 1. After cleaning, reset the cross-section cleaning mechanism 4, and start the pushing mechanism 7 again. The pushing mechanism 7 pushes The end faces of the two fluoroplastic steel pipes 1 are moved to contact each other, and the pushing mechanism 7 is closed after contact. The stainless steel base pipe is welded first. After welding is completed, the rotating plate 505 is driven by the heating handle 501 to rotate 180 degrees with the sliding shaft 904 as the center and contact the guide rail 906. The heating tile 503 heats the fluoroplastic layer on the outside of the fluoroplastic steel pipe 1, and the heated welding rod (fluoroplastic) is placed at the interface of the fluoroplastic layer of the two fluoroplastic steel pipes 1 to melt it to form a layer of molten fluoroplastic. The heating mechanism 5 is reset, the locking mechanism 2 and the fixing mechanism 3 are released, the fluoroplastic steel pipe 1 is rotated 180 degrees and clamped again, and the part not covered with the fluoroplastic layer is heated and repaired. After the repair is completed, it is allowed to cool naturally. After cooling, the anti-retraction limit sleeve 6 is removed, and the welding position is checked to be flat, free of bubbles and cracks. If the above problems are found, they should be handled in time or re-welded.

[0029] When using the adjustment mechanism 8 to adjust the position of the fixing mechanism 3, use a hexagonal wrench to remove the adjusting screw 801, push the fixing mechanism 3 to slide on the outside of the adjusting shaft 803, and after the fixing mechanism 3 slides to the appropriate position, use a hexagonal wrench to pass the adjusting screw 801 through the adjusting frame 802 to connect with the fixing mechanism 3. When the diameter of the fluoroplastic steel pipe 1 is larger, the position of the fixing mechanism 3 is adjusted accordingly to the outside. When the diameter of the fluoroplastic steel pipe 1 is smaller, the position of the fixing mechanism 3 is adjusted accordingly to the inside.

[0030] When the fluoroplastic steel pipe 1 is clamped by the locking mechanism 2 and the fixing mechanism 3, the locking nut 205 is rotated, the locking nut 205 is disengaged from the upper locking frame 201, the locking column 204 is pulled to rotate 90 degrees to one side with the rotating shaft at the end of the locking block 206 as the center, the upper locking frame 201 is rotated 90 degrees with the rotating shaft at the end as the center, and a suitable slip 203 is installed according to the diameter of the fluoroplastic steel pipe 1, the fluoroplastic steel pipe 1 is placed on the slip 203 of the lower locking frame 202, and the upper locking frame 201 is rotated 90 degrees in the opposite direction with the rotating shaft at the end as the center, the slip 203 of the upper locking frame 201 contacts the fluoroplastic steel pipe 1, the locking column 204 is pushed to rotate 90 degrees upward with the rotating shaft at the end of the locking block 206 as the center, and the locking nut 205 is rotated to contact the upper locking frame 201. At this time, the locking mechanism 2 and the fixing mechanism 3 clamp the fluoroplastic steel pipe 1.

[0031] When installing the anti-retraction limit sleeve 6 on the fluoroplastic steel pipe 1, firstly sleeve the limit ring 602 and the fixing ring 603 on the outside of the fluoroplastic steel pipe 1, clamp the fluoroplastic steel pipe 1 through the locking mechanism 2 and the fixing mechanism 3, then sleeve the sliding ring 605 and the sliding sleeve 609 on the end of the fluoroplastic steel pipe 1 to be welded, push the sliding ring 605 and the sliding sleeve 609 forward, the sliding ring 605 contacts the slip 203, at this time, the positioning pin 604 passes through the through hole of the slip 203, the fixing ring 603 is inserted into the end of the positioning pin 604, the limit handle 601 is located in the horizontal or vertical direction, the arc-shaped slide groove on the limit ring 602 corresponds to the positioning pin 604, the limit handle 601 is rotated to one side by a certain angle from the horizontal direction or the vertical direction, the limit handle 601 drives the limit ring 602 to quickly cooperate with the positioning pin 604 for installation, and the limit handle 601 is rotated from the horizontal direction or the vertical direction to the side by a certain angle, The rotation of the rotating ring 606 drives the rotating sleeve 607 to rotate to one side along the thread, and the rotating sleeve 607 drives the clamping sleeve 608 to rotate to one side. During the rotation of the clamping sleeve 608, the locking claw 612 is squeezed inwardly, and the locking claw 612 contacts the fluoroplastic steel pipe 1. The rotating sleeve 607 rotates to one side along the thread and squeezes the pressing plate 610. One end of the pressing plate 610 drives the locking plate 611 to move toward the inside of the sliding sleeve 609 and gradually compresses the fluoroplastic steel pipe 1. Under the double locking of the locking claw 612 and the locking plate 611, the fluoroplastic steel pipe 1 is locked. At this time, the anti-retreat limit sleeve 6 is installed to prevent the outer fluoroplastic layer of the fluoroplastic steel pipe 1 from retreating during welding, which affects the welding strength and quality.

[0032] When the pushing mechanism 7 is started, the output end of the pushing motor 701 starts to rotate. The pushing motor 701 is a servo motor and can be controlled to reverse. The output end of the pushing motor 701 rotates to drive the pushing shaft 702 to rotate. Under the action of the outer thread of the pushing shaft 702, the pushing shaft 702 rotates to drive the pushing block 208 to move forward. The forward movement of the pushing block 208 drives the lower locking frame 202 to move forward. The forward movement of the lower locking frame 202 drives the upper locking frame 201 to move forward. The upper locking frame 201 and the lower locking frame 202 are locked. 02 moves forward and drives the fluoroplastic steel pipe 1 to move forward, so that the fluoroplastic steel pipe 1 is close to the cross-section cleaning mechanism 4 and the heating mechanism 5 to complete the next processing step. After welding is completed and the fluoroplastic steel pipe 1 is removed, the push motor 701 is started to reverse, and the output end of the push motor 701 reverses to drive the push block 208 to move backward. The push block 208 moves backward and drives the lower locking frame 202 to move backward. The lower locking frame 202 moves backward and drives the upper locking frame 201 to move backward. At this time, replace the next group of fluoroplastic steel pipes 1 for welding.

[0033] When the cross-section cleaning mechanism 4 cleans the end surface of the fluoroplastic steel pipe 1, the cleaning motor 401 is started, and the output end of the cleaning motor 401 drives the active pulley 403 to rotate. Under the action of the power belt 404, the active pulley 403 rotates to drive the driven pulley 405 to rotate, and the driven pulley 405 rotates to drive the internal rotating shaft to rotate. The rotation of the rotating shaft drives the annular cutters 406 at both ends to rotate. When the annular cutter 406 cleans the end surface of the fluoroplastic steel pipe 1, the pushing mechanism 7 is started to apply a certain thrust to the fluoroplastic steel pipe 1.

[0034] When removing the anti-retraction limit sleeve 6, use a wrench to twist the rotating ring 606 in the opposite direction. The rotating ring 606 rotates in the opposite direction to drive the rotating sleeve 607 to rotate outward along the thread. The rotating sleeve 607 rotates outward along the thread and disengages from the pressure plate 610. The pressure plate 610 drives the locking plate 611 to disengage from the fluoroplastic steel pipe 1. The rotating sleeve 607 drives the clamping sleeve 608 to rotate outward, and the clamping sleeve 608 disengages from the locking claw 612. The locking claw 612 disengages from the fluoroplastic steel pipe 1. The limiting handle 601 is rotated a certain angle to the horizontal or vertical direction, and the fixing ring 603 is removed from the end of the positioning pin 604 that passes through the slip 203. The sliding ring 605 and the sliding sleeve 609 are pulled backward. The sliding ring 605 is disengaged from the slip 203, and the sliding ring 605 and the sliding sleeve 609 are disengaged from the fluoroplastic steel pipe 1. At this time, the anti-retraction limit sleeve 6 is removed from the fluoroplastic steel pipe 1.

[0035] The above-mentioned embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person skilled in the art, several modifications, improvements and substitutions can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding, characterized in that: The invention comprises a fluoroplastic steel pipe (1), the inner side of which is fixedly connected to a stainless steel base pipe, an anti-retraction limit sleeve (6) is arranged at the end of the fluoroplastic steel pipe (1), a locking mechanism (2) is arranged on the side of the anti-retraction limit sleeve (6), a pushing mechanism (7) is arranged on the lower side of the locking mechanism (2), a supporting mechanism (9) is arranged on the lower side of the pushing mechanism (7), a fixing mechanism (3) is arranged on the other end of the supporting mechanism (9), adjustment mechanisms (8) are arranged on both sides of the fixing mechanism (3), a heating mechanism (5) is arranged on the side of the supporting mechanism (9), a cross-section cleaning mechanism (4) is arranged on one side of the heating mechanism (5), the anti-retraction limit sleeve (6) comprises a sliding ring (605), the sliding ring ( The outer side surface of the sliding ring (605) is hexagonal, the sliding ring (605) is slidably connected to the outer side surface of the fluoroplastic steel pipe (1), the side surface of the sliding ring (605) is fixedly connected to a sliding sleeve (609), one end of the sliding sleeve (609) is fixedly connected to a plurality of locking claws (612) at intervals of 30 degrees, a plurality of rectangular through grooves are opened in the middle of the sliding sleeve (609) at intervals of 60 degrees, a pressing plate (610) is fixedly connected in the through groove, the inner side surface of the other end of the pressing plate (610) is fixedly connected to a locking plate (611), the cross section of the locking plate (611) is arc-shaped, the arc-shaped outer side surface of the sliding sleeve (609) is provided with a thread, and the outer side surface of the pressing plate (610) is provided with a thread groove connected to the thread of the sliding sleeve (609).

2. The fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding according to claim 1 is characterized in that: The anti-retraction limit sleeve (6) also includes a plurality of positioning pins (604), one end of the positioning pin (604) is fixedly connected to the side of the sliding ring (605), the other end of the positioning pin (604) is slidably connected to the fixing ring (603), the outer side of the fixing ring (603) is provided with a sliding groove, and the limiting ring (602) is slidably connected in the sliding groove, the other end of the positioning pin (604) is provided with an arc-shaped sliding groove on the side, the limiting ring (602) is slidably connected in the arc-shaped sliding groove of the positioning pin (604), the inner side surface of the limiting ring (602) is provided with arc-shaped sliding grooves at intervals of 90 degrees, the diameter of the arc-shaped sliding grooves is consistent with the diameter of the positioning pin (604), and the outer side surface of the limiting ring (602) is symmetrically fixedly connected to the limiting handle (601).

3. The fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding according to claim 2 is characterized in that: The anti-retraction limiting sleeve (6) also includes a rotating sleeve (607), the inner side surface of the rotating sleeve (607) is provided with a thread matching the thread of the sliding sleeve (609), the rotating sleeve (607) and the sliding sleeve (609) are rotatably connected via the thread, one end of the rotating sleeve (607) is fixedly connected to a rotating ring (606), the outer side surface of the rotating ring (606) is hexagonal, and the inner side surface of the other end of the rotating sleeve (607) is fixedly connected to a clamping sleeve (608), and the cross-section of the clamping sleeve (608) is triangular.

4. The fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding according to claim 1, characterized in that: The locking mechanism (2) comprises a plurality of slips (203), the slips (203) being slidably connected to the fluoroplastic steel pipe (1), the slips (203) being slidably connected to the positioning pin (604), the arcuate outer side surface of the slip (203) being fixedly connected to a T-shaped block, the outer side of the T-shaped block being slidably connected to another slip (203), a countersunk hole being provided in the middle of the slip (203), a positioning screw (207) being slidably connected in the countersunk hole, the positioning screw (207) passing through the slip (203) and the end of which is threadedly connected to an upper locking frame (201).

5. The fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding according to claim 4, characterized in that: The locking mechanism (2) further comprises a lower locking frame (202), the lower locking frame (202) being rotatably connected to the upper locking frame (201) via a rotating shaft, the other end of the lower locking frame (202) being rotatably connected to a locking block (206) via a rotating shaft, the upper surface of the locking block (206) being fixedly connected to a locking column (204), the other end of the upper locking frame (201) being provided with an elliptical slide groove, the locking column (204) being slidably connected in the elliptical slide groove of the upper locking frame (201), and the outer side surface of the locking column (204) being threadedly connected to a locking nut (205).

6. The fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding according to claim 1, characterized in that: The support mechanism (9) comprises a sliding shaft (904), the sliding shaft (904) is slidably connected to the lower locking frame (202), a plurality of baffles (902) are fixedly connected to the outer side of the sliding shaft (904), a bracket (901) is fixedly connected to the lower surface of the baffle (902), two supporting shafts (905) are fixedly connected to the lower ends of the plurality of baffles (902), a guide rail (906) is fixedly connected between the two supporting shafts (905), two isolation blocks (907) are fixedly connected to the side of the bracket (901), and an auxiliary shaft (903) is slidably connected to the other end of the lower locking frame (202), and both ends of the auxiliary shaft (903) are fixedly connected to the baffle (902).

7. The fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding according to claim 1, characterized in that: The adjustment mechanism (8) comprises an adjustment shaft (803), the two ends of the adjustment shaft (803) are fixedly connected to the baffle (902), the fixing mechanism (3) is arranged on the outer side of the adjustment shaft (803), the fixing mechanism (3) has the same structure as the locking mechanism (2), the two sides of the fixing mechanism (3) are connected to adjustment screws (801) by threads, the outer side of the adjustment screw (801) is slidably connected to an adjustment frame (802), the adjustment frame (802) is provided with a plurality of circular through holes, and the two ends of the adjustment frame (802) are fixedly connected to the baffle (902).

8. The fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding according to claim 1, characterized in that: The pushing mechanism (7) comprises two pushing motors (701), the pushing motors (701) are fixedly connected to the upper surface of the bracket (901), the output end of the pushing motor (701) is fixedly connected to a pushing shaft (702), the outer side of the pushing shaft (702) is rotatably connected to a guide block (703), the other end of the guide block (703) is fixedly connected to the bracket (901), the outer side of the pushing shaft (702) is connected to a pushing block (208) via a thread, and the pushing block (208) is fixedly connected to the lower locking frame (202).

9. The fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding according to claim 1, characterized in that: The cross-section cleaning mechanism (4) comprises a sliding block (407), wherein the sliding block (407) is rotatably connected to the sliding shaft (904), a side of the sliding block (407) is fixedly connected to a housing (408), the housing (408) is slidably connected to the isolation block (907), a cleaning handle (402) is fixedly connected to the other side of the housing (408), a cleaning motor (401) is fixedly connected to the side of one end of the housing (408), an output end of the cleaning motor (401) passes through the housing (408) and is fixedly connected to a driving pulley (403) on the outside of the housing (408), the other end of the housing (408) is rotatably connected to two ring knives (406) via a rotating shaft, a driven pulley (405) is fixedly connected to the outside of the rotating shaft located inside the housing (408), and a power belt (404) is sleeved on the driving pulley (403) and the driven pulley (405).

10. The fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding according to claim 1, characterized in that: The heating mechanism (5) comprises a rotating plate (505), the rotating plate (505) is rotatably connected to the sliding shaft (904), a heating frame (502) is fixedly connected to the side of the rotating plate (505), the heating frame (502) is slidably connected to the isolation block (907), a heating handle (501) is fixedly connected to the side of the heating frame (502), a heating tile (503) is fixedly connected to the side of the heating frame (502), and one end of the heating frame (502) is fixedly connected to a support column (504).

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