Automatic tube drawing equipment for steel lining polytetrafluoroethylene tube and using method

Abstract

The invention discloses automatic tube drawing equipment for a steel lining polytetrafluoroethylene tube and a using method. The automatic tube drawing equipment comprises an automatic steel tube feeding device, a tube drawing device and an automatic polytetrafluoroethylene tube feeding device. The pipe pulling device comprises a supporting frame, a hard straight pull rod capable of penetrating into a steel pipe is fixedly arranged at one end of the supporting frame, a chuck connected with a polytetrafluoroethylene pipe is arranged at the end of the hard straight pull rod, and an auxiliary supporting mechanism, a main supporting mechanism and a plurality of supporting assemblies are sequentially arranged on the supporting frame in the length direction. The supporting frame is provided with an auxiliary driving device used for driving the auxiliary supporting mechanism to move in the length direction of the supporting frame and a main driving device used for driving the main supporting mechanism and the supporting assembly to move in the length direction of the supporting frame. The automatic steel pipe feeding device can enable steel pipes to fall into a main supporting mechanism and an auxiliary supporting mechanism of the pipe pulling device. By means of the automatic teflon pipe feeding device, the teflon pipe can fall into a supporting assembly of the pipe pulling device, the whole set of automatic production process can be completed, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of automatic tube drawing and nesting in the production process of steel-lined polytetrafluoroethylene tubes, and in particular to automatic tube drawing equipment for steel-lined polytetrafluoroethylene tubes and a use method thereof. Background Art

[0002] Steel pipe lined with PTFE pipe is the most widely used conveying pipeline in the chemical industry. Its components are mainly made by splicing steel pipe with flange and PTFE pipe. Pulling PTFE pipe into steel pipe is one of the important manufacturing processes. This process takes a long time in production and is the longest process in the whole process.

[0003] At present, this process is mainly operated manually, and the main equipment is a winch with a wire rope. First, the steel pipe and the PTFE pipe are manually moved or hoisted to the supporting platform, and the wire rope is manually passed through the steel pipe. Next, a chuck is installed on the PTFE pipe, and the chuck is connected to the wire rope. Finally, the winch is started to pull the PTFE pipe into the steel pipe.

[0004] With respect to the above-mentioned related technologies, it is believed that the following defects exist: low efficiency of manual operation, high labor intensity in the operation process, inability to realize automated production, not suitable for batch production, and difficulty in meeting the needs of large-scale production. Summary of the invention

[0005] To solve the above problems, the present invention discloses an automatic steel-lined polytetrafluoroethylene tube drawing device and a method for using the device, which can improve production efficiency, reduce the labor intensity of operators, is suitable for batch production, and meets the needs of large-scale production.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: an automatic steel-lined polytetrafluoroethylene pipe drawing device, comprising an automatic steel pipe feeding device, a pipe drawing device, and an automatic polytetrafluoroethylene pipe feeding device; The steel tube automatic feeding device and the PTFE tube automatic feeding device are respectively located on both sides along the width direction of the tube drawing device; The tube pulling device comprises a support frame, a rigid straight pull rod capable of penetrating into the interior of the steel tube is fixedly arranged at one end of the support frame, an automatic chuck capable of being connected to a polytetrafluoroethylene tube is arranged at the end of the rigid straight pull rod, a secondary support mechanism, a main support mechanism and a plurality of V-shaped support plates are arranged in sequence along the length direction of the support frame, and a secondary driving device for driving the secondary support mechanism to move along the length direction of the support frame is arranged on the support frame; a main driving device for driving the main support mechanism and the V-shaped support plate to move along the length direction of the support frame is arranged on the support frame; The steel pipe automatic feeding device comprises a first feeding frame, on which parallel support assemblies are arranged, the top ends of the support assemblies are flush and have an inclined structure, the lower end of the top end of the support assemblies is close to the tube drawing device, and the end close to the tube drawing device is provided with an upwardly protruding blocking portion, and the inner sides of the support assemblies are respectively provided with lifting mechanisms, the top ends of the lifting mechanisms have an inclined structure, and the inclination direction of the top ends of the lifting mechanisms is consistent with the inclination direction of the top ends of the support assemblies, so as to realize the transfer of steel pipes to the main support mechanism and the auxiliary support mechanism; The automatic feeding device for polytetrafluoroethylene tubes comprises a pushing mechanism and a servo driving mechanism. The servo driving mechanism drives the pushing mechanism, and the pushing mechanism pushes the polytetrafluoroethylene tubes to be transferred to the V-shaped supporting plate.

[0007] Preferably, the main support mechanism includes a main support plate, and the auxiliary support mechanism includes a auxiliary support plate. Slide rails are arranged on the sides of the main support plate and the auxiliary support plate in the opposite directions. Lifting devices are respectively installed on the main support mechanism and the auxiliary support mechanism. The lifting device includes a first lifting cylinder and a lifting pallet. The lifting pallet is installed on the slide rail. The first lifting cylinder drives the lifting pallet to rise and fall on the slide rail, and the top of the lifting pallet is an inclined lifting surface.

[0008] Preferably, the main drive device includes a first transmission chain and a first driven sprocket. The first transmission chain is connected to the main support mechanism through a chain buckle to drive the main support mechanism to move along the length direction. At least two V-shaped support plates are also connected to the chain buckle of the first transmission chain.

[0009] Preferably, the main supporting mechanism further comprises a reflective induction switch for detecting whether the polytetrafluoroethylene tube is pulled to a required position.

[0010] Preferably, the support assembly includes a fixed support assembly and an adjustable support assembly; The fixed support assembly and the adjustable support assembly are both mounted in parallel on the linear guide rail at the upper end of the first feeding frame. The adjustable support assembly can slide along the length direction of the linear guide rail to support steel pipes of different lengths.

[0011] Preferably, the fixed support assembly and the adjustable support assembly are both equipped with a diameter specification adjustment mechanism, which includes a hand-cranked wheel, a lead screw, a nut, and a connecting arm. The hand-cranked wheel drives the rotation of the lead screw, and the rear end of the connecting arm is connected to the lifting mechanism to control the movement of the lifting mechanism along the length direction of the support assembly to adjust the lifting of steel pipes with different diameters. Or / and, the diameter specification adjustment mechanism includes a motor, a screw, a nut, and a connecting arm. The motor drives the screw to rotate. The rear end of the connecting arm is connected to the lifting mechanism to control the movement of the lifting mechanism along the length direction of the supporting component to adjust the lifting of steel pipes with different diameters.

[0012] Preferably, the lifting mechanism includes a support member and a second lifting cylinder, and the second lifting cylinder controls the lifting of the support member to achieve lifting of the steel pipe.

[0013] Preferably, the automatic feeding device for polytetrafluoroethylene tubes comprises a second feeding frame and a push baffle, the second feeding frame is equipped with a linear guide rail, the push baffle is installed on the guide rail slider, and moves along the length direction of the linear guide rail to push several polytetrafluoroethylene tubes to move forward at the same time; The servo drive mechanism is configured as a dual drive structure to ensure that the push baffle is subjected to a balanced driving force in the length direction, thereby preventing the push baffle from being stuck due to uneven force.

[0014] Preferably, the automatic feeding device for polytetrafluoroethylene tubes also includes a flip slope and a flip cylinder. The flip slope is hinged to one side of the plane of the second feeding frame. The flip cylinder is arranged at the lower end of the flip slope and is hinged to the second feeding frame. The flip cylinder drives the flip slope to flip downward to prevent the polytetrafluoroethylene tube from falling directly to the ground, thereby realizing that the polytetrafluoroethylene tube falls into the V-shaped support plate of the tube pulling device.

[0015] A method for using a steel-lined polytetrafluoroethylene pipe automatic tube drawing device, using the above-mentioned steel-lined polytetrafluoroethylene pipe automatic tube drawing device for processing, the steps are as follows: S1: Put the steel pipe from the steel pipe storage rack into the steel pipe automatic feeding device, the lifting mechanism lifts the steel pipe, and the steel pipe is transferred to the main support mechanism and the auxiliary support mechanism; S2: Adjust the distance between the main support mechanism and the auxiliary support mechanism. The main support mechanism and the auxiliary support mechanism move synchronously to the left along the length direction. The rigid straight pull rod passes through the inner hole of the steel pipe and is connected to the automatic chuck. S3: The servo drive mechanism drives the baffle to push several PTFE tubes to move backward at the same time. The program prepares the distance of the PTFE tubes' backward movement in advance according to the sizes of PTFE tubes with different diameters to ensure that only one PTFE tube is transferred to the V-shaped support plate at a time. S4: The automatic chuck clamps the PTFE tube, the main support mechanism drives the steel tube to move towards the PTFE tube, and each V-shaped support plate moves away from the steel tube to withdraw the support for the PTFE tube. The reflective induction switch detects that the PTFE tube is pulled into place and stops, forming a finished tube.

[0016] The benefits of the present invention are: 1. The automatic steel pipe feeding device can realize automatic feeding of steel pipes of different specifications and lengths. It no longer requires manual handling or lifting, which greatly reduces labor intensity. The support assembly can store multiple steel pipes at a time, ensuring the production rhythm and improving production efficiency.

[0017] 2. The main support mechanism and the auxiliary support mechanism support the steel pipe to move synchronously, and the automatic chuck is connected to pass through the inner hole of the steel pipe and extend from the other end. There is no need to perform the cumbersome operation of first passing the steel wire rope through the steel pipe and then installing the chuck according to the existing technology, which improves production efficiency.

[0018] 3. The V-shaped support plate is installed on the transmission chain to save space, cleverly utilize limited space, and dynamically utilize the chain structure. It can not only provide driving force for the main support mechanism, but also use the rigid track of the chain to support the PTFE tube. When the main support mechanism moves backward, the V-shaped support plate can be moved to the lower end of the support surface on the support frame, without wasting space, simplifying the mechanism and saving equipment costs.

[0019] 4. The main support mechanism and the auxiliary support mechanism are driven by servo motors. The speed can be adjusted during the tube drawing process. Different speeds are used for different specifications and different interference degrees to ensure that the stretching amount of the PTFE tube is in the optimal state during the tube drawing process, avoiding excessive stress caused by excessive stretching, which may cause the PTFE tube to be broken. The maximum speed can be used during the dry run to reduce auxiliary time and improve efficiency.

[0020] 5. The main support mechanism of the present invention is equipped with a reflective induction switch to directly detect the remaining length of the tail polytetrafluoroethylene tube from the end face of the steel pipe flange. The detected value is accurate, thus avoiding the length error caused by the polytetrafluoroethylene tube being stretched and extended when being detected from one end.

[0021] 6. The servo drive mechanism of the automatic feeding device for polytetrafluoroethylene tubes of the present invention is a dual-power output drive structure, which can ensure that when pushing a polytetrafluoroethylene tube of a longer length, the push baffle can be driven from both ends at the same time, so as to avoid the situation where one-side driving force is uneven and causes jamming.

[0022] 7. The present invention replaces the original manual processing device with a set of automatic processing devices, which greatly improves the efficiency to 5-10 times of the original. It has a high degree of automation, low dependence on personnel, saves manpower, and greatly reduces labor intensity; it is simple to operate and can be completed by one person, reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is the overall picture of the automatic tube drawing equipment for steel-lined PTFE tubes; Figure 2 This is the structural diagram of the automatic tube drawing device for steel-lined PTFE tubes; Figure 3 for Figure 2 A is a partial enlarged schematic diagram; Figure 4 for Figure 2 A partial enlarged schematic diagram of B in the middle; Figure 5 for Figure 3 Schematic diagram of another direction; Figure 6 This is the structural diagram of the automatic steel pipe feeding device for steel-lined PTFE pipes; Figure 7 for Figure 6 A partial enlarged schematic diagram of C in the middle; Figure 8 This is the structural diagram of the lifting mechanism driving device of the automatic steel pipe feeding device for steel-lined PTFE pipes; Fig. 9 for Figure 8 A partial enlarged schematic diagram of D in the middle; Fig.10 This is the structure diagram of automatic PTFE tube feeding for steel lined PTFE tube; Fig.11 for Fig.10 A partial enlarged schematic diagram of middle E; Fig.12 for Fig.10 A partial enlarged schematic diagram of middle F; Fig.13 This is the structural diagram of the rolling rack and storage rack for finished pipes.

[0025] In the figure, 1-tube pulling device, 11-support frame, 111-baffle, 112-groove, 113-limiting fixing device; 12-main supporting mechanism, 121-main supporting plate, 122-main servo motor, 123-first reducer, 124-first driving sprocket, 125-first transmission chain, 126-first driven sprocket, 127-tensioning bearing seat, 128-V-type supporting plate, 13-auxiliary supporting mechanism, 131-auxiliary supporting plate, 132-auxiliary servo motor, 133-second reducer, 134-rack, 14-rigid straight pull rod, 141-automatic chuck, 15-lifting device, 151-first lifting cylinder, 152-lifting support plate, 16-auxiliary support; 2-steel pipe automatic feeding device, 21-first feeding frame, 22-fixed support assembly, 23-adjustable support assembly, 24-lifting mechanism, 241-support, 242-second lifting cylinder, 243-lifting ramp, 25-servo adjustment mechanism, 251-first servo motor, 252-third reducer, 253-active synchronous pulley, 254-synchronous belt, 255-driven synchronous pulley, 256-expansion connecting rod, 26-adjusting foot pad, 27-diameter specification adjustment mechanism, 271-hand wheel, 272-screw, 273-nut, 274-connecting arm, 275-diameter specification scale; 3-PTFE tube automatic feeding device, 31-second feeding frame, 32-pushing baffle, 33-turning ramp, 34-turning cylinder, 35-servo drive mechanism, 351-second servo motor, 352-fourth reducer, 353-second driving sprocket, 354-second transmission chain, 355-second driven sprocket, 356-ball screw, 36-detection switch; 4-rolling frame, 41-bottom frame, 42-adjusting support frame, 43-length span scale; 5-storage rack, 51-bottom support frame, 52-transfer rack, 521-transfer rack support, 522-transfer rack stop bar; 6- Steel pipe; 7-PTFE tube; 8- Finished pipe; 9-operating table; 10-Electrical cabinet. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms, "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] Please refer to Figure 1-Figure 13 The present invention provides a steel-lined polytetrafluoroethylene tube automatic tube drawing device and a method for using the same, and the specific scheme is as follows: An automatic steel-lined polytetrafluoroethylene pipe drawing device comprises a pipe drawing device 1, an automatic steel pipe feeding device 2, an automatic polytetrafluoroethylene pipe feeding device 3, a rolling rack 4, a storage rack 5, an operating table 9, an electrical cabinet 10 and other components.

[0032] The tube pulling device 1 includes a support frame 11, on which parallel linear guide rails are installed, on which a main support mechanism 12 and a secondary support mechanism 13 for supporting the steel tube 6 are installed, and flanges are respectively provided at both ends of the steel tube 6, and the flanges are clamped in the V-shaped grooves of the main support mechanism 12 and the secondary support mechanism 13, and a baffle 111 is provided at one end of the support frame 11, and a groove 112 is opened on the baffle 111, and an anti-drop limit fixing device 113 is provided at the upper end of the groove 112, and the groove 112 clamps one end of the rigid straight pull rod 14 with a flange, and the other end of the rigid straight pull rod 14 is connected to one side of the automatic chuck 141, and the other side of the automatic chuck 141 supports On the auxiliary support mechanism 13, the main support mechanism 12 includes a main support plate 121 and a main drive device, the main drive device includes a main servo motor 122, a first reducer 123, a first driving sprocket 124, a first transmission chain 125, a first driven sprocket 126, a tensioning bearing seat 127, and a V-shaped support plate 128. The main servo motor 122 and the first reducer 123 drive the first driving sprocket 124 to rotate, and the first transmission chain 125 is arranged on the first driving sprocket 124. The first transmission chain 125 is connected to the lower end surface of the main support mechanism 12 through a chain buckle, and at least two V-shaped chain buckles are also arranged on the chain buckle of the first transmission chain 125. The support plate 128 is used to support the polytetrafluoroethylene tube 7. The first driven sprocket 126 is rotatably matched with the tension bearing seat 127. A tensioning screw extending along the length direction of the support frame 11 is fixedly provided on the tension bearing seat 127. A connecting plate for the tensioning screw to pass through is fixedly provided on the support frame 11. A tensioning nut is threadedly matched on one side of the tensioning screw passing through the connecting plate. By tightening the tensioning nut, the tensioning bearing seat 127 is tightened to ensure the tensioning force of the first transmission chain 125. The auxiliary support mechanism 13 includes an auxiliary support plate 131 and an auxiliary drive device. The auxiliary drive device includes an auxiliary servo motor 132, a second reducer 133, and a rack 134. , the rack 134 is installed on one side of the support frame 11, the output shaft end of the first reducer 123 is coaxially fixed with a gear, the gear is meshed with the rack 134, a slide rail is installed on one side of the main support plate 121 and the auxiliary support plate 131, and a lifting device 15 for lifting the finished pipe 8 is provided on the opposite sides of the main support mechanism 12 and the auxiliary support mechanism 13. The lifting device 15 includes a first lifting cylinder 151 and a lifting support plate 152. The lifting support plate 152 is respectively installed on the slide rails of the main and auxiliary support plates. The first lifting cylinder 151 drives the lifting support plate 152 to rise and fall on the slide rail, and the top of the lifting support plate 152 is an inclined lifting surface. The auxiliary support mechanism 13 is also provided with an auxiliary support 16 for supporting the rigid straight pull rod 14 on the side close to the baffle 111. A reflective induction switch is installed on the main support mechanism 12, which can be used to detect that the polytetrafluoroethylene tube 7 is pulled to the required position.

[0033] The automatic steel pipe feeding device 2 includes a first feeding frame 21, a fixed support assembly 22, an adjustable support assembly 23, a lifting mechanism 24, a servo adjustment mechanism 25, an adjustment pad 26, a diameter specification adjustment mechanism 27 and other components. The first feeding frame 21 is provided with an adjustment pad 26 on its legs, which is used to adjust the level of the entire automatic steel pipe feeding device 2 and ensure that the four legs are completely in contact with the ground to prevent the first feeding frame 21 from being unstable. Two linear guide rails are installed on the first feeding frame 21. The two linear guide rails are parallel to the steel pipes on the automatic steel pipe feeding device. Two parallel support assemblies are installed on the linear guide rails. The support assembly includes a fixed support assembly 22 and an adjustable support assembly 23. The top ends of the two support assemblies are flush with each other and are in an inclined structure. The lower end of the top of the support assembly is close to the pipe drawing device 1, and the end close to the pipe drawing device 1 is provided with an upwardly protruding blocking portion. The adjustable support assembly 23 slides along the length direction of the linear guide rail. A lifting mechanism 24 is installed on the opposite sides of the support assembly, and the lifting mechanism 24 includes a support member 241 and a second lifting cylinder 242. The lower end surface of the support member 241 is connected to a lifting slope 243, and the top end is an inclined structure. The inclination direction of the top end of the support member 241 is consistent with the inclination direction of the top end of the fixed support assembly 22 and the adjustable support assembly 23. The second lifting cylinder 242 adjusts the lifting height of the steel pipe 6. The servo adjustment mechanism 25 is composed of a first servo motor 251, a third reducer 252, an active synchronous pulley 253, a synchronous belt 254, a driven synchronous pulley 255, and an expansion link 256. The active synchronous pulley 253 is adaptively connected to the first servo motor 251 and the third reducer 252. The active synchronous pulley 253 and the driven synchronous pulley 255 are covered with a synchronous belt 254. The servo adjustment mechanism 25 adjusts the adjustment support assembly 23 to support steel pipes 6 of different lengths. Multiple steel pipes 6 can be placed on the adjustment support assembly 23. The driven synchronous pulley 255 is rotatably engaged on the driven support seat. The expansion link 256 is fixedly arranged on the driven support seat. A fixing plate for the expansion link 256 to pass through is fixedly arranged on the first feeding frame 21. The expansion link 256 passes through a threaded hole on one side of the connecting plate and is fitted with a nut. A diameter specification adjustment mechanism 27 is installed on the rear side of the lifting mechanism 24 along the width direction of the support assembly, and is provided with a diameter specification scale 275, which can be adjusted according to the different diameters of the steel pipe 6. The diameter specification adjustment mechanism 27 includes a hand-cranked wheel 271, a lead screw 272, a nut 273, and a connecting arm 274. The hand-cranked wheel 271 drives the rotation of the lead screw 272, and the rear end of the connecting arm 274 is connected to the lifting mechanism 24 to control the lifting mechanism 24 to move along the length direction of the fixed support assembly 22 to adjust the lifting of the steel pipe 6 with different diameters; wherein the manual control is realized by the hand-cranked wheel 271, and the automatic control is realized by the rotating drive mechanism, and the rotating drive mechanism used to drive the lead screw 272 to rotate can also use a motor, a cylinder, etc.

[0034] The automatic feeding device 3 for polytetrafluoroethylene tubes includes a second feeding frame 31, a push baffle 32, a flip slope 33, a flip cylinder 34, a servo drive mechanism 35, a detection switch 36 and other components. A linear guide is installed on the second feeding frame 31, and the push baffle 32 is installed on the linear guide slider, and moves along the length direction of the linear guide to push several polytetrafluoroethylene tubes 7 to move forward at the same time. The bottom end of the flip cylinder 34 is hinged to the second feeding frame 31, and the movable end of the flip cylinder 34 is hinged to the flip slope 33. Specifically, two flip cylinders 34 are provided, which are respectively provided on both sides of the flip slope 33. The servo drive mechanism 35 includes a second servo motor 351, a fourth reducer 352, a second active sprocket 353, a second transmission chain 354, a second driven sprocket 355, and two sets of ball screws 356. The output end of the fourth reducer 352 is coaxially fixed with two second active sprockets 353, and the ends of the screws of the two sets of ball screws 356 are coaxially provided with a second driven sprocket 355. The screws in the ball screws 356 are rotationally matched with the second feeding frame 31, and the nut in the ball screws 356 is fixedly connected to the push baffle 32. The servo drive mechanism 35 is a dual-drive structure, which realizes the synchronous operation of the two sets of ball screws 356, ensures that the push baffle 32 is subjected to a balanced driving force in the length direction, and prevents the situation where the uneven force causes the eccentric weight to jam. The program compiles the forward movement distance according to the different diameter specifications of the PTFE tube 7 in advance. Under the control of the detection switch 36 and the servo drive mechanism 35, only one PTFE tube rolls onto the flip slope 33 at a time. The flip slope 33 is driven by the flip cylinder 34 to flip downward, and the PTFE tube 7 rolls onto the V-shaped support plate 128. The flip slope 33 is in the upper position when the main support mechanism 12 and the auxiliary support mechanism 13 move, leaving enough space for the main support mechanism 12 and the auxiliary support mechanism 13 to move and avoid interference. The flip slope 33 provides a buffer ramp for the PTFE tube 7 to fall onto the V-shaped support plate 128.

[0035] The rolling rack 4 includes a bottom frame 41, an adjustment support frame 42, and a length span scale 43. The bottom frame 41 is installed with a linear guide rail, and the adjustment support frame 42 is installed on the linear guide rail slider. The support spacing can be adjusted during operation to ensure that the finished tube 8 rolls smoothly onto the storage rack 5. The storage rack 5 includes a bottom support frame 51 and a transfer rack 52. The transfer rack 52 is universal and includes a transfer rack support 521 and a transfer rack stopper 522. The transfer rack stopper 522 is used to prevent the finished tube 8 from falling.

[0036] The control system includes an operation table 9 and an electrical cabinet 10, and the electrical cabinet 10 contains a programmable controller PLC, a servo drive, a switching power supply, an electromagnetic relay, etc. The input parameters of the operation interface include but are not limited to the diameter and length of the steel pipe 6. The program can set the calculation formula in advance. After selecting the diameter and length of the steel pipe 6, the parameters required for each project are automatically calculated and passed to the program. The program controls the parts of each device to go to the corresponding position, automatically matching the spacing between the fixed support assembly 22 and the adjustable support assembly 23, and the spacing between the main support mechanism 12 and the auxiliary support mechanism 13; during operation, after pressing the start button, each part will run automatically.

[0037] A method for using a steel-lined polytetrafluoroethylene tube automatic tube drawing device, comprising the following steps: S1: Put the steel pipe 6 from the steel pipe storage rack into the steel pipe automatic feeding device 2, insert the flange of the first steel pipe 6 into the raised stopper on the support assembly, and then discharge multiple steel pipes 6 in sequence, press the control button, adjust the spacing between the fixed support assembly 22 and the adjustable support assembly 23 according to the length of the steel pipe, shake the hand crank 271 to control the lifting mechanism 24 to move to a suitable position, and the second lifting cylinder 242 moves upward to lift the steel pipe 6 to the upper end surface of the raised stopper, and the steel pipe 6 is transferred from the support assembly to the main support mechanism 12 and the auxiliary support mechanism 13; S2: The main driving device and the auxiliary driving device automatically adjust the distance between the main supporting mechanism 12 and the auxiliary supporting mechanism 13 according to the length of the steel pipe, so that the flange of the steel pipe fits the outer end surface of the V-shaped groove of the main supporting mechanism 12 and the auxiliary supporting mechanism 13. After the steel pipe is transferred to the main supporting mechanism 12 and the auxiliary supporting mechanism 13, the main supporting mechanism 12 and the auxiliary supporting mechanism 13 move to the left synchronously, and the auxiliary supporting mechanism 13 and the main supporting mechanism 12 drive the steel pipe 6 to move in the direction close to the baffle 111 until the rigid straight pull rod 14 is inserted into the steel pipe 6; S3: The servo drive mechanism 35 on the PTFE tube automatic feeding device 3 drives the push baffle 32 to push several PTFE tubes 7 forward at the same time. The program is programmed in advance to push the baffle 32 backward according to the sizes of PTFE tubes 7 with different diameters. The PTFE tubes 7 roll onto the flip slope 33. The flip slope 33 flips downward under the drive of the flip cylinder 34 to ensure that only one PTFE tube 7 is transferred to the V-shaped support plate 128 at a time. S4: The operator assists the automatic chuck 141 to clamp the PTFE tube 7, and the main support mechanism 12 drives the steel tube 6 to move toward the PTFE tube 7. During this process, each V-shaped support plate 128 moves away from the steel tube 6 to withdraw from supporting the PTFE tube 7. The reflective induction switch detects that the PTFE tube 7 is pulled into place and stops, forming a finished tube 8. The operator separates the automatic chuck 141 from the PTFE tube 7;

[0038] S5: The auxiliary support mechanism 13 and the main support mechanism 12 drive the steel-lined polytetrafluoroethylene tube to the position of the rolling rack 4, and then the lifting device 15 is started, and the support member 241 lifts the finished tube 8 upward. The lifted height of the finished tube 8 exceeds the upper end surface of the auxiliary support mechanism 13 and the main support mechanism 12, and the lifting pallet 152 slides down to lift the finished tube 8 and transfer it to the rolling rack 4, and then transfer it to the storage rack 5, and the auxiliary support mechanism 13 and the main support mechanism 12 are reset, completing the whole process of automatically pulling the polytetrafluoroethylene tube 7 into the steel tube 6.

[0039] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic steel-lined polytetrafluoroethylene pipe drawing equipment, characterized in that: Including automatic steel pipe feeding device, pipe drawing device, and PTFE pipe automatic feeding device; The steel tube automatic feeding device and the PTFE tube automatic feeding device are respectively located on both sides along the width direction of the tube drawing device; The tube pulling device comprises a support frame, a rigid straight pull rod capable of penetrating into the interior of the steel tube is fixedly arranged at one end of the support frame, an automatic chuck capable of being connected to a polytetrafluoroethylene tube is arranged at the end of the rigid straight pull rod, a secondary support mechanism, a main support mechanism and a plurality of V-shaped support plates are arranged in sequence along the length direction of the support frame, and a secondary driving device for driving the secondary support mechanism to move along the length direction of the support frame is arranged on the support frame; a main driving device for driving the main support mechanism and the V-shaped support plate to move along the length direction of the support frame is arranged on the support frame; The steel pipe automatic feeding device comprises a first feeding frame, on which parallel support assemblies are arranged, the top ends of the support assemblies are flush and have an inclined structure, the lower end of the top end of the support assemblies is close to the tube drawing device, and the end close to the tube drawing device is provided with an upwardly protruding blocking portion, and the inner sides of the support assemblies are respectively provided with lifting mechanisms, the top ends of the lifting mechanisms have an inclined structure, and the inclination direction of the top ends of the lifting mechanisms is consistent with the inclination direction of the top ends of the support assemblies, so as to realize the transfer of steel pipes to the main support mechanism and the auxiliary support mechanism; The automatic feeding device for polytetrafluoroethylene tubes comprises a pushing mechanism and a servo driving mechanism. The servo driving mechanism drives the pushing mechanism, and the pushing mechanism pushes the polytetrafluoroethylene tubes to be transferred to the V-shaped supporting plate.

2. The automatic steel-lined polytetrafluoroethylene pipe drawing equipment according to claim 1 is characterized in that: The main support mechanism includes a main support plate, and the auxiliary support mechanism includes a auxiliary support plate. Slide rails are arranged on the sides of the main support plate and the auxiliary support plate in the opposite directions. Lifting devices are respectively installed on the main support mechanism and the auxiliary support mechanism. The lifting device includes a first lifting cylinder and a lifting support plate. The lifting support plate is installed on the slide rail. The first lifting cylinder drives the lifting support plate to rise and fall on the slide rail. The top of the lifting support plate is an inclined lifting surface.

3. The automatic steel-lined polytetrafluoroethylene pipe drawing equipment according to claim 1 is characterized in that: The main driving device includes a first transmission chain and a first driven sprocket. The first transmission chain is connected to the main support mechanism through a chain buckle to drive the main support mechanism to move along the length direction. At least two V-shaped support plates are also connected to the chain buckle of the first transmission chain.

4. The automatic steel-lined polytetrafluoroethylene pipe drawing equipment according to claim 1 is characterized in that: The main supporting mechanism also includes a reflective induction switch for detecting that the polytetrafluoroethylene tube is pulled to a required position.

5. The automatic steel-lined polytetrafluoroethylene pipe drawing equipment according to claim 1 is characterized in that: The support assembly includes a fixed support assembly and an adjustable support assembly; The fixed support assembly and the adjustable support assembly are both mounted in parallel on the linear guide rail at the upper end of the first feeding frame. The adjustable support assembly can slide along the length direction of the linear guide rail to support steel pipes of different lengths.

6. The automatic steel-lined polytetrafluoroethylene pipe drawing equipment according to claim 5 is characterized in that: The fixed support assembly and the adjustable support assembly are both equipped with a diameter specification adjustment mechanism, which includes a hand-cranked wheel, a lead screw, a nut, and a connecting arm. The hand-cranked wheel drives the rotation of the lead screw, and the rear end of the connecting arm is connected to the lifting mechanism to control the movement of the lifting mechanism along the length direction of the support assembly to adjust the lifting of steel pipes with different diameters. Or / and, the diameter specification adjustment mechanism includes a motor, a screw, a nut, and a connecting arm. The motor drives the screw to rotate. The rear end of the connecting arm is connected to the lifting mechanism to control the movement of the lifting mechanism along the length direction of the supporting component to adjust the lifting of steel pipes with different diameters.

7. The automatic steel-lined polytetrafluoroethylene pipe drawing equipment according to claim 1 is characterized in that: The lifting mechanism includes a support member and a second lifting cylinder, and the second lifting cylinder controls the lifting of the support member to achieve lifting of the steel pipe.

8. The automatic steel-lined polytetrafluoroethylene pipe drawing equipment according to claim 1 is characterized in that: The automatic feeding device for polytetrafluoroethylene tubes comprises a second feeding frame and a push baffle, the second feeding frame is equipped with a linear guide rail, the push baffle is installed on the guide rail slider, and moves along the length direction of the linear guide rail to push several polytetrafluoroethylene tubes to move forward at the same time; The servo drive mechanism is configured as a dual drive structure to ensure that the push baffle is subjected to a balanced driving force in the length direction, thereby preventing the push baffle from being stuck due to uneven force.

9. The automatic steel-lined polytetrafluoroethylene pipe drawing equipment according to claim 8, characterized in that: The automatic feeding device for polytetrafluoroethylene tubes also includes a flip slope and a flip cylinder. The flip slope is hinged to one side of the plane of the second feeding frame. The flip cylinder is arranged at the lower end of the flip slope and is hinged to the second feeding frame. The flip cylinder drives the flip slope to flip downward to prevent the polytetrafluoroethylene tube from falling directly to the ground, so as to enable the polytetrafluoroethylene tube to fall into the V-shaped support plate of the tube pulling device.

10. A method for using a steel-lined polytetrafluoroethylene tube automatic tube drawing device, characterized in that: According to any one of claims 1 to 9, the steel-lined polytetrafluoroethylene pipe automatic pipe drawing equipment is processed, and the steps are as follows: S1: Put the steel pipe from the steel pipe storage rack into the steel pipe automatic feeding device, the lifting mechanism lifts the steel pipe, and the steel pipe is transferred to the main support mechanism and the auxiliary support mechanism; S2: Adjust the distance between the main support mechanism and the auxiliary support mechanism. The main support mechanism and the auxiliary support mechanism move synchronously to the left along the length direction. The rigid straight pull rod passes through the inner hole of the steel pipe and is connected to the automatic chuck. S3: The servo drive mechanism drives the baffle to push several PTFE tubes to move backward at the same time. The program prepares the distance of the PTFE tubes' backward movement in advance according to the sizes of PTFE tubes with different diameters to ensure that only one PTFE tube is transferred to the V-shaped support plate at a time. S4: The automatic chuck clamps the PTFE tube, the main support mechanism drives the steel tube to move towards the PTFE tube, and each V-shaped support plate moves away from the steel tube to withdraw the support for the PTFE tube. The reflective induction switch detects that the PTFE tube is pulled into place and stops, forming a finished tube.

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