A fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding

Abstract

The present invention relates to the field of fluoroplastic steel, and in particular to a fluoroplastic anti-retreat limit sleeve for fluoroplastic steel welding. The technical problem to be solved by the present invention is that there is a difference in thermal expansion coefficient between fluoroplastic and steel. During the welding process, the relative displacement between the two may be caused due to temperature changes, 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 can easily lead to cracking or leakage of the joint; if problems such as poor fusion, air holes, slag inclusions, etc. occur during the welding process, the quality of the welded joint will be reduced. It includes a fluoroplastic steel pipe, a stainless steel base pipe is fixedly connected to the inner side of the fluoroplastic steel pipe, and an anti-retreat limit sleeve is provided at the end of the fluoroplastic steel pipe. By providing the anti-retreat limit sleeve, a wrench is used to twist the rotating ring, and the rotating ring rotates to drive the rotating sleeve to rotate to one side along the thread, and the rotating sleeve drives the pressing sleeve to rotate to one side, and the pressing sleeve rotates to one side to squeeze 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 polymer material, fluoroplastic steel boasts excellent corrosion resistance, high temperature resistance, and aging resistance, and has therefore found widespread application in a variety of fields. In the construction sector, fluoroplastic steel, due to its excellent corrosion and aging resistance, is often used in building water supply and drainage pipes, water treatment equipment, and outdoor facilities. The use of fluoroplastic steel ensures the stability and durability of both interior and exterior building structures, extending their service life.

[0003] Fluoroplastic steel pipes can be connected using flanges, mechanical connections, and welded joints. Welded joints are primarily used in diverter or converging piping systems that require high strength and excellent sealing. Prior art techniques often involve temperature fluctuations during welding, which can cause relative displacement between fluoroplastics and steel due to differences in thermal expansion coefficients. This can affect the sealing and strength of the welded joint. Welded joints are areas of stress concentration, and improper handling can easily lead to cracking or leakage. Problems such as poor fusion, porosity, and slag inclusions can also reduce the quality of welded joints. Summary of the Invention

[0004] (1) Technical problems to be solved

[0005] 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 the welding process, 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 in the joint; if problems such as poor fusion, air holes, slag inclusions, etc. occur during the welding process, all of which will reduce the quality of the welded joint. The technical problem to be solved by the present invention is to provide a fluoroplastic anti-retreat limit sleeve for fluoroplastic steel welding.

[0006] (2) Technical solution

[0007] 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 fixedly connected to the inner side of the fluoroplastic steel pipe, the end of the fluoroplastic steel pipe is provided with the anti-retreat limit sleeve, the side of the anti-retreat limit sleeve is provided with a locking mechanism, the lower side of the locking mechanism is provided with a pushing mechanism, the lower side of the pushing mechanism is provided with a supporting mechanism, the other end of the supporting mechanism is provided with a fixing mechanism, the two sides of the fixing mechanism are provided with an adjusting mechanism, the side of the supporting mechanism is provided with a heating mechanism, and one side of the heating mechanism is provided with a cross-section cleaning mechanism. The management mechanism, the anti-retreat 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 to the sliding sleeve, one end of the sliding sleeve is fixedly connected to a plurality of locking claws at intervals of 30 degrees, the middle part of the sliding sleeve is provided with a plurality of rectangular through grooves at intervals of 60 degrees, a pressure plate is fixedly connected in the through groove, the inner side surface of the other end of the pressure plate is fixedly connected to a locking plate, the cross-section of the locking plate is arc-shaped, the arc-shaped outer side surface of the sliding sleeve is provided with a thread, and the outer surface of the pressure plate is provided with a thread groove connected to the thread of the sliding sleeve.

[0008] 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 fixed ring, a sliding groove is provided on the outer side of the fixed ring, and 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, and the limiting ring is slidably connected in the arc-shaped sliding groove of the positioning pin, and 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.

[0009] Preferably, the anti-retreat 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 and the sliding sleeve are rotatably connected through the thread, one end of the rotating sleeve is fixedly connected to a rotating ring, the outer side surface of the rotating ring is hexagonal, and the inner side surface of the other end of the rotating sleeve is fixedly connected to a clamping sleeve, and the cross-section of the clamping sleeve is triangular.

[0010] 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 arc-shaped 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 connected to the upper locking frame by a thread.

[0011] Preferably, the locking mechanism also includes a lower locking frame, which is rotatably connected to the upper locking frame via a rotating shaft, and the other end of the lower locking frame is rotatably connected to a locking block via a rotating shaft, and the upper surface of the locking block is fixedly connected to a locking column, and the other end of the upper locking frame is provided with an elliptical slide groove, and the locking column is slidably connected to the elliptical slide groove of the upper locking frame, and the outer side surface of the locking column is threadedly connected to a locking nut.

[0012] Preferably, the support 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, the lower surface of the baffle is fixedly connected to a bracket, 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.

[0013] Preferably, the adjustment mechanism includes an adjusting shaft, both ends of the adjusting shaft are fixedly connected to the baffle, and a fixing mechanism is provided on the outer side of the adjusting shaft for sliding connection. The fixing mechanism has the same structure as the locking mechanism, and both sides of the fixing mechanism are threadedly connected to adjusting screws, and the outer side of the adjusting screw is slidingly connected to an adjusting frame, and a plurality of circular through holes are provided on the adjusting frame, and both ends of the adjusting frame are fixedly connected to the baffle.

[0014] 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.

[0015] 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 knives through a rotating shaft, and a driven pulley is fixedly connected to the outside of the rotating shaft inside the shell, and a power belt is provided on the driving pulley and the driven pulley.

[0016] Preferably, the heating mechanism includes a rotating plate, which 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.

[0017] (3) Beneficial effects

[0018] 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 compression sleeve to rotate to one side. The compression 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 pressure plate. The pressure plate moves toward the fluoroplastic steel pipe and drives the locking plate to contact the fluoroplastic steel pipe. This prevents the fluoroplastic layer of the fluoroplastic steel pipe from shifting during welding, ensuring the sealing and strength of the fluoroplastic steel pipe.

[0019] 2. By setting the locking mechanism and the fixing mechanism, rotate the locking nut so that the locking nut is out of contact with the upper locking frame. Pull the locking column to rotate 90 degrees to one side with the rotating shaft at the end of the locking block as the center of the circle. Rotate the upper locking frame 90 degrees with the rotating shaft at the end as the center of the circle. Place the fluoroplastic steel pipe on the slips of the lower locking frame, reset the upper locking frame, push the locking column to reset, and rotate the locking nut 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 weld.

[0020] 3. By setting up a cross-section cleaning mechanism, under the action of the power belt, the rotation of the active pulley drives the rotation of the driven pulley, the rotation of the driven pulley drives the rotation of the internal rotating shaft, 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 air holes 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 driving shaft to rotate, and the rotation of the driving shaft drives the pushing block to move back and forth horizontally, thereby avoiding poor fusion problems during welding and improving the quality of the welded joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic structural diagram of the locking mechanism of the present invention;

[0023] Figure 3 This is a schematic diagram of the anti-retreat limit sleeve structure of the present invention;

[0024] Figure 4 is a cross-sectional view of the sliding ring of the present invention;

[0025] Figure 5 is a cross-sectional view of a fixing ring of the present invention;

[0026] Figure 6 is a cross-sectional view of the rotating ring of the present invention;

[0027] Figure 7 is a cross-sectional view of the slip of the present invention;

[0028] Figure 8 It is a schematic structural diagram of the support mechanism of the present invention;

[0029] Figure 9 is a cross-sectional view of the housing of the present invention;

[0030] Figure 10 It is a schematic structural diagram of the heating mechanism of the present invention.

[0031] The marks in the accompanying 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-support mechanism, 901-bracket, 902-baffle, 903-auxiliary shaft, 904-sliding shaft, 905-support shaft, 906-guide rail, 907-isolation block. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings and examples.

[0033] Example 1

[0034] 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 a fluoroplastic layer is provided on the outer side of the stainless steel base pipe. 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, providing strength and corrosion resistance, while the fluoroplastic layer is located on the outer side, providing excellent properties such as chemical resistance, high temperature resistance and low friction coefficient. The end of the fluoroplastic steel pipe 1 is provided with an anti-retreat limit sleeve 6. 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, and the joint at the weld is prevented from cracking or leaking. A pushing mechanism 7 is provided on the lower side of the locking mechanism 2. By providing the pushing mechanism 7, it helps to reduce welding process The defects and mistakes in the process are eliminated, making the welding joints smoother, smoother and free of defects, thereby improving the overall performance and reliability of the pipeline system. A supporting mechanism 9 is provided on the lower side of the pushing mechanism 7. By providing the supporting mechanism 9, the overall weight is reduced, which is convenient for changing the site. A fixing mechanism 3 is provided 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 provided on both sides of the fixing mechanism 3. By providing the adjusting mechanism 8, it is suitable for fluoroplastic steel pipes 1 of different diameters. A heating mechanism 5 is provided on the side of the supporting mechanism 9. By providing the heating mechanism 5, the connection strength of the fluoroplastic layer on the outside is high, the sealing is good, and the appearance is beautiful. A cross-section cleaning mechanism 4 is provided on one side of the heating mechanism 5. By providing 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.

[0035] The anti-retreat 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, and the side 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. Six rectangular through grooves are provided at intervals of 60 degrees in the middle of the sliding sleeve 609. A pressure plate 610 is fixedly connected in the through groove. The pressure plate 610 is made of elastic material. One end of the pressure plate 610 is flush with the sliding sleeve 609, and the other end of the pressure plate 610 is higher than the outer side surface of the sliding sleeve 609. The inner side surface of the other end of the pressure plate 610 is fixedly connected to a locking plate 611. 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. The outer side surface of the pressure plate 610 is provided with a thread that is consistent with the sliding 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 to the 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 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 groove is consistent with the diameter of the positioning pin 604. When the arc-shaped sliding groove on the inner side of the limiting ring 602 is rotated to the same position as the positioning pin 604, the limiting ring 602 can release the lock on the positioning pin 604, and the outer side surface of the limiting ring 602 is symmetrically fixedly connected with two limit handles 601.

[0036] like Figure 6 As shown, the anti-retreat 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 and the sliding sleeve 609 are rotatably connected 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.

[0037] 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. A through hole corresponding to the positioning pin 604 is provided on the slip 203, and the positioning pin 604 is slidably connected in the through hole provided 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. Multiple slips 203 are slidably connected in this way. A countersunk hole is provided in the middle of the slip 203, and a positioning screw 207 is slidably connected in the countersunk hole. The multiple slips 203 are fixed with the positioning screw 207 through 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 through a thread, one end of the upper locking frame 201 is rotatably connected to the lower locking frame 202 through a rotating shaft, and the other end of the lower locking frame 202 is rotatably connected to the locking block 206 through a rotating shaft, and the upper surface of the locking block 206 is fixedly connected to the locking column 204, and the other end of the upper locking frame 201 is provided with an elliptical slide groove, and the locking column 204 is slidably connected in the elliptical slide groove of the upper locking frame 201, and the outer side surface of the locking column 204 is connected to the locking nut 205 through a thread.

[0038] like Figure 8 As shown, the support mechanism 9 includes a sliding shaft 904, which is slidably connected to the lower locking frame 202, and a plurality of baffles 902 are fixedly connected to the outer side of the sliding shaft 904, and a bracket 901 is fixedly connected to the lower surface of the baffle 902, and the lower ends of the plurality of baffles 902 are fixedly connected to two support shafts 905, and a guide rail 906 is fixedly connected between the two support shafts 905, and two isolation blocks 907 are fixedly connected to the side of the bracket 901, and the other end of the lower locking frame 202 is slidably connected to an auxiliary shaft 903, and both ends of the auxiliary shaft 903 are fixedly connected to the baffle 902.

[0039] 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, and a fixing mechanism 3 is provided on the outside 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 with adjustment screws 801 through threads, and 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.

[0040] 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 connected to the pushing block 208 through a thread, and the pushing block 208 is fixedly connected to the lower locking frame 202.

[0041] like Figure 9 As shown, the cross-section cleaning mechanism 4 includes a sliding block 407, which is rotatably connected to the sliding shaft 904, and 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, and the other side of the shell 408 is fixedly connected to the cleaning handle 402. The side of one end of the shell 408 is fixedly connected to the cleaning motor 401, and the 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 the driving pulley 403. The other end of the shell 408 is rotatably connected to two ring cutters 406 through a rotating shaft, and the rotating shaft is located on the outside of the shell 408 and is fixedly connected to a driven pulley 405. A power belt 404 is provided on the driving pulley 403 and the driven pulley 405.

[0042] like Figure 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 the support column 504.

[0043] Example 2

[0044] 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 of the circle to contact the guide rail 906, start the pushing mechanism 7, and the pushing mechanism 7 pushes the locking mechanism 2 toward the fixing mechanism 3. After the two fluoroplastic steel pipes 1 come into contact with the cross-section cleaning mechanism 4, the pushing mechanism 7 is closed, and the cross-section cleaning mechanism 4 cleans the end face of the fluoroplastic steel pipe 1. After cleaning, reset the cross-section cleaning mechanism 4, start the pushing mechanism 7 again, and the pushing mechanism 7 pushes Move the end faces of the two fluoroplastic steel pipes 1 into contact, close the pushing mechanism 7 after contact, and weld the stainless steel base pipe first. After welding is completed, drive the rotating plate 505 to rotate 180 degrees with the sliding shaft 904 as the center through the heating handle 501 and contact the guide rail 906. The heating tile 503 heats the fluoroplastic layer on the outside of the fluoroplastic steel pipe 1, and put the heated welding rod (fluoroplastic) on the interface of the fluoroplastic layer of the two fluoroplastic steel pipes 1 to melt it to form a layer of molten fluoroplastic. Reset the heating mechanism 5, release the locking mechanism 2 and the fixing mechanism 3, rotate the fluoroplastic steel pipe 1 180 degrees and clamp it again, heat and repair the part not covered with the fluoroplastic layer, wait for it to cool naturally after repairing, remove the anti-retreat limit sleeve 6 after cooling, and check whether the weld is flat, without bubbles and cracks. If the above problems are found, they should be dealt with in time or re-welded.

[0045] 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 and connect it to 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.

[0046] When the fluoroplastic steel pipe 1 is clamped by the locking mechanism 2 and the fixing mechanism 3, the locking nut 205 is rotated, and the locking nut 205 is disengaged from the upper locking frame 201, and 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, and the upper locking frame 201 is rotated 90 degrees with the rotating shaft at the end as the center, and the appropriate slips 203 are installed according to the diameter of the fluoroplastic steel pipe 1, and the fluoroplastic steel pipe 1 is placed on the slips 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, and the slips 203 of the upper locking frame 201 are in contact with the fluoroplastic steel pipe 1, and 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.

[0047] When installing the anti-retraction limit sleeve 6 on the fluoroplastic steel pipe 1, first the limit ring 602 and the fixing ring 603 are sleeved on the outside of the fluoroplastic steel pipe 1, and the fluoroplastic steel pipe 1 is clamped by the locking mechanism 2 and the fixing mechanism 3. Then the sliding ring 605 and the sliding sleeve 609 are sleeved on the end of the fluoroplastic steel pipe 1 to be welded, and the sliding ring 605 and the sliding sleeve 609 are pushed forward. The sliding ring 605 contacts the slip 203. At this time, the positioning pin 604 is passed through the through hole of the slip 203, and 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, and the arc 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. The direction is rotated to one side by a certain angle, which drives the limit ring 602 to rotate to a certain angle. At this time, the limit ring 602 locks the positioning pin 604 to prevent it from retreating. Use a wrench to twist the rotating ring 606. The rotating ring 606 rotates and drives the rotating sleeve 607 to rotate to one side along the thread. The rotating sleeve 607 drives the compression sleeve 608 to rotate to one side. During the rotation of the compression sleeve 608, the locking claw 612 is squeezed inwardly. The locking claw 612 contacts the fluoroplastic steel pipe 1. The rotating sleeve 607 rotates to one side along the thread and squeezes the pressure plate 610. One end of the pressure plate 610 drives the locking plate 611 to move toward the inside of the sliding sleeve 609 and gradually presses 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.

[0048] 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 to drive 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 is reversed 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, the next group of fluoroplastic steel pipes 1 are replaced for welding.

[0049] When the cross-section cleaning mechanism 4 cleans the end face 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 face of the fluoroplastic steel pipe 1, the pushing mechanism 7 is started to apply a certain thrust to the fluoroplastic steel pipe 1.

[0050] 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 compression sleeve 608 to rotate outward, and the compression 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 locating pin 604 passing 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.

[0051] The above-described embodiments merely represent preferred embodiments of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications, improvements, and substitutions without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding, characterized in that: The invention comprises a fluoroplastic steel pipe (1), wherein the inner side of the fluoroplastic steel pipe (1) is fixedly connected to a stainless steel base pipe, an anti-retraction limit sleeve (6) is provided at the end of the fluoroplastic steel pipe (1), a locking mechanism (2) is provided on the side of the anti-retraction limit sleeve (6), a pushing mechanism (7) is provided on the lower side of the locking mechanism (2), a supporting mechanism (9) is provided on the lower side of the pushing mechanism (7), a fixing mechanism (3) is provided at the other end of the supporting mechanism (9), an adjusting mechanism (8) is provided on both sides of the fixing mechanism (3), and a side of the supporting mechanism (9) is provided. A heating mechanism (5) is provided, a cross-section cleaning mechanism (4) is provided on one side of the heating mechanism (5), 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 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, and the middle part of the sliding sleeve (609) is provided with a plurality of rectangular locking claws (612) at intervals of 60 degrees. A through groove is fixedly connected to a pressure plate (610) in the through groove, and a locking plate (611) is fixedly connected to the inner side surface of the other end of the pressure plate (610), and 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 pressure plate (610) is provided with a thread groove connected to the thread of the sliding sleeve (609); 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 surface of the sliding ring (605), and the positioning pin (604) The other end is slidably connected to a fixing ring (603), a sliding groove is provided on the outer side of the fixing ring (603), and a limiting ring (602) is slidably connected in the sliding groove. The other end side of the positioning pin (604) is provided with an arc sliding groove, and the limiting ring (602) is slidably connected in the arc sliding groove of the positioning pin (604). The inner side surface of the limiting ring (602) is provided with arc sliding grooves at intervals of 90 degrees, and the diameter of the arc sliding groove is consistent with the diameter of the positioning pin (604). The outer side surface of the limiting ring (602) is symmetrically fixedly connected to the limiting handle (601).

2. The fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding according to claim 1, 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 that matches the thread of the sliding sleeve (609), the rotating sleeve (607) and the sliding sleeve (609) are rotatably connected through 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 pressing sleeve (608), and the cross-section of the pressing sleeve (608) is triangular.

3. The fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding according to claim 1, characterized in that: The locking mechanism (2) includes a plurality of slips (203), the slips (203) are slidably connected to the fluoroplastic steel pipe (1), the slips (203) are slidably connected to the positioning pin (604), the arc-shaped outer side surface of the slip (203) 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 (203), a countersunk hole is opened in the middle of the slip (203), a positioning screw (207) is slidably connected in the countersunk hole, the positioning screw (207) passes through the slip (203) and the end is connected to the upper locking frame (201) through a thread.

4. The fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding according to claim 3, 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 slot, the locking column (204) being slidably connected in the elliptical slot of the upper locking frame (201), and the outer side surface of the locking column (204) being threadedly connected to a locking nut (205).

5. The fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding according to claim 4, characterized in that: The support mechanism (9) includes 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), the lower surface of the baffle (902) is fixedly connected to a bracket (901), the lower ends of the plurality of baffles (902) are fixedly connected to two supporting shafts (905), 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), the other end of the lower locking frame (202) is slidably connected to an auxiliary shaft (903), and both ends of the auxiliary shaft (903) are fixedly connected to the baffle (902).

6. The fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding according to claim 5, characterized in that: The adjusting mechanism (8) comprises an adjusting shaft (803), both ends of the adjusting shaft (803) are fixedly connected to the baffle (902), the fixing mechanism (3) is provided on the outer side of the adjusting shaft (803), the fixing mechanism (3) has the same structure as the locking mechanism (2), both sides of the fixing mechanism (3) are connected to adjusting screws (801) through threads, the outer side of the adjusting screw (801) is slidably connected to an adjusting frame (802), a plurality of circular through holes are provided on the adjusting frame (802), and both ends of the adjusting frame (802) are fixedly connected to the baffle (902).

7. The fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding according to claim 6, characterized in that: The pushing mechanism (7) includes 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 the 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) through a thread, and the pushing block (208) is fixedly connected to the lower locking frame (202).

8. The fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding according to claim 7, characterized in that: The cross-section cleaning mechanism (4) includes a sliding block (407), the sliding block (407) is rotatably connected to the sliding shaft (904), the side of the sliding block (407) is fixedly connected to a shell (408), the shell (408) is slidably connected to the isolation block (907), the other side of the shell (408) is fixedly connected to a cleaning handle (402), the side of one end of the shell (408) is fixedly connected to a cleaning motor (401), the output end of the cleaning motor (401) passes through the shell (408) and is fixedly connected to a driving pulley (403) on the outside of the shell (408), the other end of the shell (408) is rotatably connected to two ring knives (406), the outside of the rotating shaft located inside the shell (408) is fixedly connected to a driven pulley (405), and a power belt (404) is provided on the driving pulley (403) and the driven pulley (405).

9. The fluoroplastic anti-retraction limit sleeve for fluoroplastic steel welding according to claim 8, characterized in that: The heating mechanism (5) includes 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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