A takeover machine

Abstract

The present invention provides a pipe connecting machine, comprising a base, a first pipe connecting unit, a second pipe connecting unit and a cutter unit. When the first pipe connecting unit and the second pipe connecting unit are clamped, the corresponding left clamping jaw and right clamping jaw both adopt a synchronous centering movement method, and the positions of the first pipe and the second pipe to be connected are kept in the middle original position, ensuring that the actual connection position is consistent with the target position initially placed by the user, reducing the waste of liquid in the pipe and improving the utilization rate. The first pipe connecting unit, which plays a role of rotation and reversing, adopts a rotating frame together with the first clamping mechanism to rotate as a whole, which makes the steering smoother, the docking position more precise, occupies less space in the left and right directions, and the pipe connecting machine as a whole is more compact. The present invention also designs a circle pressing mechanism, which can automatically press the joints of the two pipes to restore the squeezed pipe to a circular shape, ensuring smooth flow in the pipe, reducing manual participation and improving the level of automation, and can also control the best circle pressing time through the program to achieve the best circle pressing effect.

Description

Technical Field

[0001] The present invention relates to the field of biomedical technology, in particular to a pipe receiving machine. Background Art

[0002] The connecting machine is a device that cuts and reconnects two tubes. It is essential in the fields of blood collection and supply, clinical surgery, biopharmaceuticals, etc. Figure 1 As shown, the first tube 91 and the second tube 92 need to be aseptically joined so that the liquid source connected to the first tube can continue to be supplied to the receiving end connected to the second tube. The joining machine uses a heated cutter to cut the first tube 91 into a first tube front section 911 and a first tube rear section 912, and cut the second tube 92 into a second tube front section 921 and a second tube rear section 922, and then swap the positions of the first tube front section 911 and the second tube front section 921, as shown in FIG. Figure 2 As shown, after the swap, the first tube front section 911 and the second tube rear section 922 are joined in a sterile state, and the second tube front section 921 and the first tube rear section 912 are joined in a sterile state.

[0003] A pipe connecting machine generally includes a pipe support for arranging the first pipe and the second pipe, and a clamping mechanism located on both sides of the pipe support. The clamping mechanism of the pipe connecting machine currently on the market is generally a single-sided movable type, where the clamping mechanism on one side is fixed and connected to the rotary drive mechanism, and the clamping mechanism on the other side moves back and forth driven by the translation mechanism to achieve clamping and loosening. For example, a sterile pipe connecting machine is disclosed in the patent document with publication number CN113172895A, which adopts the above structure. When connecting the pipe, the pipe connecting machine with the above structure needs to drive the first pipe and the second pipe to move in a direction perpendicular to the length of the pipe to drag the two pipes. Before the clamping mechanisms on both sides clamp the pipe support, the position of the two pipes in the pipe support is not stable. The dragging action will cause the two pipes to shift in the length direction, which will cause the actual pipe connection position to deviate from the user's placement position, affecting the user experience. Furthermore, the aseptic tube receiving machine's rotary transmission mechanism uses two half-gear rings, each mounted on two clamping mechanisms. When clamped, the two halves form a complete ring gear. This can cause misalignment and lead to jamming, affecting the accuracy of the rotation angle. Furthermore, the unilateral movement results in a larger overall range of motion and occupies a large space. Summary of the Invention

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the present invention aims to provide a take-over machine.

[0005] To achieve the above-mentioned object, the present invention solves the technical problem by adopting the following technical solution: a pipe connecting machine, comprising a base and a first pipe connecting unit and a second pipe connecting unit installed on the base and distributed front and back along the length direction of the pipe to be connected;

[0006] The first connecting pipe unit includes a first supporting seat, a rotating frame, a first rotating driving mechanism and a first clamping mechanism, the first supporting seat is fixed on the base, the rotating frame is rotatably mounted on the first supporting seat via a rotating guide structure, and the first clamping mechanism is mounted on the rotating frame; the first clamping mechanism includes a first pipe support, a first bracket, a first left clamping jaw, a first right clamping jaw and a first clamping driving mechanism, the first bracket is mounted on the rotating frame, the first pipe support is placed on the first bracket, the first left clamping jaw and the first right clamping jaw are respectively located on both sides of the first pipe support, and the first clamping driving mechanism drives the first left clamping jaw and the first right clamping jaw to synchronously approach or move away from the first pipe support; the first rotating driving mechanism is used to drive the rotating frame and the first clamping mechanism to synchronously rotate around the rotation center of the first pipe support;

[0007] The second connecting pipe unit includes a second supporting seat, a front-back shifting driving mechanism and a second clamping mechanism, the second supporting seat can be movably installed on the base, and the front-back shifting driving mechanism is used to drive the second supporting seat and the second clamping mechanism to move forward and backward synchronously; the second clamping mechanism includes a second pipe support, a second bracket, a second left clamping jaw, a second right clamping jaw and a second clamping driving mechanism, the second bracket is fixed at the middle position of the second supporting seat, the second pipe support is placed on the second bracket, the second left clamping jaw and the second right clamping jaw are respectively located on both sides of the second pipe support, and the second clamping driving mechanism drives the second left clamping jaw and the second right clamping jaw to synchronously move closer to or away from the second pipe support;

[0008] The cutter unit is located between the first connecting pipe unit and the second connecting pipe unit, and the cutter unit cuts the pipe between the first pipe support and the second pipe support by hot melting.

[0009] With the technical solution of the present invention, when the first and second clamping mechanisms are clamped, the corresponding left and right clamping jaws both adopt a synchronous centering movement method. The first and second tube supports are in the middle position and do not shift. The first and second tubes to be joined remain in place and do not move. This ensures that the actual joining position matches the user's initial target position, reducing waste of liquid in the tubes and improving utilization. The first connecting unit, which performs a rotational reversing function, adopts a rotating frame and a first clamping mechanism that rotates as a whole. This makes the turning more stable, the docking position more precise, and the space occupied in the left and right directions is small, making the connecting machine more compact.

[0010] Furthermore, the first bracket is installed on the rotating frame so as to be movably moved left and right via a first guide mechanism; and it also includes a rotation-yielding drive mechanism and a reset drive device installed between the rotating frame and the first clamping mechanism; the rotation-yielding drive mechanism is used to drive the first bracket to move laterally relative to the first tube support, so that the first bracket does not interfere with the first tube support when rotating with the rotating frame; the reset drive device is used to drive the first bracket to reset and return to its initial position directly below the rotation center of the first tube support.

[0011] After the first and second tubes are fused, the rotating frame and the first clamping mechanism rotate 180° along with the fused first and second tubes on that side, and then the two tubes are interlaced and docked. This preferred solution facilitates smooth 180° rotation and reset of the rotating frame and the first clamping mechanism (excluding the first tube support) after the interlaced docking of the two tubes, making it easier for users to remove the tubes.

[0012] Furthermore, the reset drive device is a reset spring, and the two ends of the reset spring are respectively connected between the first bracket and the rotating frame; the rotation-yielding drive mechanism includes a hook claw and an unlocking plate, the first bracket is provided with a hook hole, the hook claw is rotatably mounted on the first right clamping jaw, and the unlocking plate is mounted on the rotating frame; when the first right clamping jaw moves to the left and closes, the hook claw is hooked and engaged with the hook hole during the leftward displacement; when the first right clamping jaw is opened to the right, the hook claw pulls the first bracket to move to the right to a yielding state position. In this yielding state position, the first bracket is separated from the first tube support, and when the first bracket rotates with the rotating frame, the first bracket does not interfere with the first tube support; when the first right clamping jaw continues to open to the right from the yielding state position, the tail end of the hook claw conflicts with the unlocking plate to prompt the hook claw to rotate to the unlocked state, the hook claw is disengaged from the hook hole, and at the same time, the first bracket returns to its initial position directly below the rotation center of the first tube support under the action of the reset spring.

[0013] By adopting the above-mentioned preferred solution, the design of the reset drive device and the rotational yielding drive mechanism is more ingenious, and is linked with the displacement of the first right clamping jaw. By controlling the opening and closing position of the first right clamping jaw, the yielding, unlocking and resetting of the first bracket can be achieved. The structure is more compact and the stability is more reliable.

[0014] Furthermore, both sides of the first tube holder and the second tube holder are respectively provided with tube receiving grooves adapted to the diameter of the tube to be connected, and the first tube holder and the second tube holder are respectively provided with electronic devices, which can reflect the diameter information of the tube to be connected adapted to the first tube holder and the second tube holder, and the upper surface and the lower surface of the first tube holder and the second tube holder are respectively provided with first conductive contacts, which are electrically connected to the electronic devices; the first bracket and the second bracket are respectively provided with second conductive contacts electrically connected to the controller; when the first tube holder is placed on the first bracket, the first conductive contact of the first tube holder is conductively connected to the second conductive contact of the first bracket; when the second tube holder is placed on the second bracket, the first conductive contact of the second tube holder is conductively connected to the second conductive contact of the second bracket.

[0015] By adopting the above preferred solution, the electronic devices embedded in the first pipe holder and the second pipe holder can facilitate the pipe connection machine to automatically read the diameter information of the pipe to be connected, and then automatically select the control program suitable for the pipe diameter.

[0016] Furthermore, the upper surface of the first bracket and the upper surface of the second bracket are both provided with a long strip positioning protrusion, the length direction of the long strip positioning protrusion is perpendicular to the length direction of the pipe to be connected, the upper surface and lower surface of the first pipe support and the second pipe support are both provided with a long strip positioning groove, the long strip positioning groove matches the long strip positioning protrusion, the first conductive contact is located on the bottom surface of the long strip positioning groove, and the second conductive contact is located on the long strip positioning protrusion.

[0017] With the above preferred solution, the long strip positioning protrusion and the long strip positioning groove are matched and positioned, which facilitates the placement of the first tube support and the second tube support.

[0018] Furthermore, four magnetic poles distributed in a square are respectively provided on the first bracket and the second bracket, and two magnetic poles are respectively provided on the front and rear sides of the elongated positioning protrusion. The outer sides of the two magnetic poles distributed in the same row in the length direction of the elongated positioning protrusion have opposite magnetic properties, and the outer sides of the two magnetic poles distributed in the same column in the direction perpendicular to the length direction of the elongated positioning protrusion have the same magnetic properties; the upper surface and lower surface of the first tube support are respectively provided with four magnetic poles. When the upper surface or lower surface of the first tube support is in contact with the first bracket, the four magnetic poles on the surface of the first tube support and the four magnetic poles of the first bracket are attracted by opposite polarities.

[0019] By adopting the above preferred solution, after the user roughly places the first tube holder and the second tube holder into the corresponding positions, they can be automatically adsorbed and aligned; the direction setting of the four magnetic poles can prevent the tube holders from being installed upside down, thereby preventing misinstallation.

[0020] Furthermore, it also includes a circular mechanism, which is arranged between the first connecting unit and the second connecting unit. The circular mechanism includes a lifting plate and a lifting drive mechanism, and the lifting drive mechanism drives the lifting plate to move up and down.

[0021] Since the cut end of the tube needs to be vertically flattened to prevent the liquid in the tube from flowing out and to ensure accurate docking, the welded joint of the tube will become sticky after hot-melt docking. By adopting the above-mentioned preferred scheme, the pressing mechanism can automatically press the docking joint to restore the squeezed tube to a round shape, ensuring smooth flow in the tube. Compared with manual pressing, it reduces manual participation and improves the level of automation, and can also control the action time of the pressing mechanism through program control to control the best pressing time and achieve the best pressing effect.

[0022] Furthermore, the cutter unit includes a cutter, a second rotary drive mechanism and a heating device, the second rotary drive mechanism is used to drive the cutter to rotate, the heating device is used to heat the cutter, and the cutter unit is fixedly connected to the second left clamping jaw.

[0023] With the above preferred solution, the cutter unit moves with the second left clamping jaw. Compared with the cutter unit fixedly installed on one side of the base, the cutter's rotating arm becomes shorter, which can provide greater cutting force under a certain output torque.

[0024] Furthermore, the lifting plate is mounted on the second support seat in a liftable manner via a vertical guide mechanism, and the lifting drive mechanism includes a stopper mounted on the lifting plate and a shifting rod mounted on the cutter.

[0025] By adopting the above preferred solution, the action of the circular mechanism is linked with the cutter, and the circular action of the lifting plate of the circular mechanism is realized by means of the action of the second rotary drive mechanism of the cutter unit, making the structure more compact and saving manufacturing costs.

[0026] Furthermore, the first clamping drive mechanism and the second clamping drive mechanism both include a drive motor, a transmission mechanism and a bidirectional lead screw, the drive motor drives the lead screw of the bidirectional lead screw to rotate through the transmission mechanism, the lead screw of the bidirectional lead screw is provided with a symmetrically arranged left threaded portion and a right threaded portion, the rotation directions of the left threaded portion and the right threaded portion are opposite, a left nut is screwed on the left threaded portion, and a right nut is screwed on the right threaded portion; the first left clamping jaw and the first right clamping jaw are respectively fixedly mounted on the left nut and the right nut of the first clamping drive mechanism; the second left clamping jaw and the second right clamping jaw are respectively fixedly mounted on the left nut and the right nut of the second clamping drive mechanism.

[0027] Furthermore, the transmission mechanism includes a first transmission gear installed in the middle position of the bidirectional screw and a second transmission gear installed on the output shaft of the drive motor. The first transmission gear and the second transmission gear are meshed with each other, and the drive motor is a DC planetary gear reduction motor.

[0028] By adopting the above preferred solution, the use of a bidirectional lead screw can improve the consistency and stability of the synchronous movement of the left and right clamping jaws, ensuring that a reliable clamping force is provided.

[0029] Furthermore, the rotary guide structure between the rotating frame and the first support seat includes an arc-shaped guide rib fixed on the first support seat and an arc-shaped guide groove opened on the rotating frame, the cross-section of the arc-shaped guide rib is T-shaped, and the arc-shaped guide rib slides along the arc-shaped guide groove; the first rotation drive mechanism includes a rotating motor, a main transmission wheel, a transmission belt, a slave transmission wheel and a driving gear, the main transmission wheel is installed on the output shaft of the rotating motor, the transmission belt is connected between the main transmission wheel and the slave transmission wheel, the slave transmission wheel and the driving gear are coaxially connected, and an arc-shaped rack is provided on the rotating frame, the arc-shaped rack is a major arc, and the driving gear is engaged with the arc-shaped rack for transmission.

[0030] By adopting the above preferred solution, the large-span rotary guide structure can improve the stability of the synchronous rotation of the rotating frame and the first clamping mechanism, and ensure the position accuracy of the re-hot-melting joint of the pipe after rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 This is the status diagram of the two pipes before taking over.

[0033] Figure 2 This is the status diagram of the two pipes after taking over.

[0034] Figure 3 It is one of the three-dimensional views of the pipe connecting machine of the present invention.

[0035] Figure 4 This is the second stereogram of the pipe connecting machine of the present invention.

[0036] Figure 5 It is a schematic diagram of the pipe connecting machine of the present invention with two pipes placed thereon.

[0037] Figure 6 This is one of the partial structural diagrams of the first connecting unit of the present invention.

[0038] Figure 7 This is the second partial structural diagram of the first connecting unit of the present invention.

[0039] Figures 8-12 This is a diagram showing the principle of action of the first connecting unit during the process of flipping and connecting two pipes.

[0040] Figure 13 is with Figure 12 The first connecting unit in the corresponding state is a schematic diagram of the partial structure of the hidden rotating frame.

[0041] Figure 14 It is a partial structural diagram of the second connecting unit.

[0042] Figure 15 It is a structural schematic diagram of the second connecting unit in a closed docking state.

[0043] Figure 16 This is a diagram showing the principle of operation of the circular mechanism when the second connecting unit is in a semi-open state.

[0044] Figure 17 It is a structural schematic diagram of the second connecting unit in a fully open state.

[0045] Figure 18 This is one of the three-dimensional views of the first tube support and the first bracket seat in the coordinated state.

[0046] Figure 19 This is the second stereoscopic view of the first tube support and the first bracket seat in the coordinated state.

[0047] Figure 20 It is a structural diagram of the first pipe support.

[0048] Figure 21 It is a top view of the first pipe support.

[0049] Figure 22 It is a structural diagram of the first bracket.

[0050] Figure 23 It is a top view of the first bracket.

[0051] The numbers and letters in the figure represent the names of the corresponding parts:

[0052] 10-base; 20-first pipe unit; 21-first support seat; 22-rotating frame; 221-arc-shaped rack; 23-rotating guide structure; 231-arc-shaped guide rib; 232-arc-shaped guide groove; 24-first rotary drive mechanism; 241-rotating motor; 242-main transmission wheel; 243-transmission belt; 244-slave transmission wheel; 245-driving gear; 25-first clamping mechanism; 251-first pipe support; 2511-pipe Accommodating slot; 2512-electronic device; 2513-first conductive contact; 2514-long strip positioning slot; 2515-S magnetic pole; 2516-N magnetic pole; 2517-rotation center; 252-first bracket; 2521-hook hole; 2522-second conductive contact; 2523-long strip positioning protrusion; 2524-guide tip; 2525-S magnetic pole; 2526-N magnetic pole; 253-first left clamping jaw; 2531-squeezing Wall pressing body; 254-first right clamping jaw; 255-first clamping drive mechanism; 2551-drive motor; 2552-bidirectional screw; 2553-first transmission gear; 2554-second transmission gear; 26-first guide mechanism; 27-reset drive element; 28-hook; 29-unlocking plate; 30-second pipe unit; 31-second support seat; 32-forward and backward shifting drive mechanism; 33-second clamping mechanism; 331-second pipe Support; 332-second support seat; 333-second left clamping jaw; 334-second right clamping jaw; 335-second clamping drive mechanism; 40-cutter unit; 41-cutter; 42-second rotation drive mechanism; 50-circular mechanism; 51-lifting plate; 511-stopper; 52-shift rod; 91-first tube; 911-front section of first tube; 912-rear section of first tube; 92-second tube; 921-front section of second tube; 922-rear section of second tube. DETAILED DESCRIPTION

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0054] In this application, the longitudinal direction of the pipe to be placed is the front-to-back direction, the side close to the first pipe unit is the front, and the side close to the second pipe unit is the rear. However, the above assumptions about the front and back directions are only for the convenience of expressing the technical solution and do not constitute a limitation on the technical solution.

[0055] like Figure 3-6As shown in FIG. 14 , a pipe connecting machine includes a base 10 and a first pipe connecting unit 20 and a second pipe connecting unit 30 installed on the base 10 and distributed front and back along the length direction of the pipe to be connected;

[0056] The first pipe connecting unit 20 includes a first support base 21, a rotating frame 22, a first rotating drive mechanism 24 and a first clamping mechanism 25. The first support base 21 is fixed to the base 10. The rotating frame 22 is rotatably mounted on the first support base 21 via a rotary guide structure 23. The first clamping mechanism 25 is mounted on the rotating frame 22. The first clamping mechanism 25 includes a first pipe bracket 251, a first bracket 252, a first left clamping jaw 253, a first right clamping jaw 254 and a first clamping drive mechanism 255. The first bracket 252 is mounted on the rotating frame 22, and the first tube support 251 is placed on the first bracket 252. The first left clamping jaw 253 and the first right clamping jaw 254 are respectively located on either side of the first tube support 251. The first clamping drive mechanism 255 drives the first left clamping jaw 253 and the first right clamping jaw 254 to synchronously move toward or away from the first tube support 251. The first rotation drive mechanism 24 is used to drive the rotating frame 22 and the first clamping mechanism 25 to synchronously rotate around the rotation center 2517 of the first tube support 251.

[0057] The second connecting pipe unit 30 includes a second supporting seat 31, a front-back shifting driving mechanism 32 and a second clamping mechanism 33. The second supporting seat 31 can be mounted on the base 10 movably back and forth. The front-back shifting driving mechanism 32 is used to drive the second supporting seat 31 and the second clamping mechanism 33 to move back and forth synchronously. The second clamping mechanism 33 includes a second tube support 331, a second bracket 332, a second left clamping jaw 333, a second right clamping jaw 334 and a second clamping driving mechanism 335. The second bracket 332 is fixed to the middle position of the second supporting seat 31. The second tube support 331 is placed on the second bracket 332. The second left clamping jaw 333 and the second right clamping jaw 334 are respectively located on both sides of the second tube support 331. The second clamping driving mechanism 335 drives the second left clamping jaw 333 and the second right clamping jaw 334 to move synchronously toward or away from the second tube support 331.

[0058] The cutter unit 40 is located between the first connecting unit 20 and the second connecting unit 30 . The cutter unit 40 cuts the pipe between the first pipe support 251 and the second pipe support 331 by hot melting.

[0059] The beneficial effects of the above technical solution are as follows: when the first and second clamping mechanisms are clamped, the corresponding left and right clamping jaws both adopt a synchronous centering movement method, the first and second tube supports are in the middle position and do not shift, and the first and second tubes to be joined remain in place and do not move, ensuring that the actual joining position matches the user's initial target position, reducing waste of liquid in the tubes and improving utilization. The first connecting unit, which performs a rotational reversing function, adopts a rotating frame and a first clamping mechanism that rotates as a whole, which makes the turning more stable, the docking position more precise, and the space occupied in the left and right directions is small, making the connecting machine more compact.

[0060] In this application, the rotation center of the rotating frame 22 is coaxial with the rotation center 2517 of the first tube holder 251. The tube receiving slots on both sides of the first tube holder 251 are axially symmetrical. After the first tube holder 251 rotates 180 degrees about its rotation center, the tube receiving slots on both sides can overlap with their pre-rotation position. This ensures that the first and second tubes are accurately connected after cutting and swapping.

[0061] like Figure 7 and 14 As shown, as is similar to the existing connecting machine, an extrusion wall 2531 is provided on the end surface opposite to the first left clamping jaw 253 and the second left clamping jaw 333, as well as on the end surface opposite to the first right clamping jaw 254 and the second right clamping jaw 334. After the extrusion wall is clamped together with the pipe support, the first pipe and the second pipe to be connected are squeezed and flattened at a position not far before and after the cutting position.

[0062] The following describes the main steps of taking over the machine in combination with the above implementation method:

[0063] Step 1: Select the first pipe holder and the second pipe holder that match the pipe to be connected, and place them on the first bracket and the second bracket respectively, and then insert the first pipe and the second pipe to be connected into the pipe receiving grooves of the pipe holder;

[0064] Step 2: The first clamping drive mechanism drives the first left clamping jaw and the first right clamping jaw to clamp together, and the second clamping drive mechanism synchronously drives the second left clamping jaw and the second right clamping jaw to clamp together;

[0065] Step 3: The heated cutter unit presses down to cut the first tube and the second tube;

[0066] Step 4: The first rotary drive mechanism drives the rotating frame and the first clamping mechanism to rotate 180°;

[0067] Step 5: The forward and backward shifting driving mechanism drives the second supporting seat and the second clamping mechanism to move forward, so as to align the two pipe ends after the reversal;

[0068] Step 6: The first clamping drive mechanism drives the first left clamping jaw and the first right clamping jaw to open; the second clamping drive mechanism drives the second left clamping jaw and the second right clamping jaw to open;

[0069] Step 7: The first rotary drive mechanism drives the rotating frame and the first clamping mechanism to rotate 180 degrees and reset;

[0070] Step 8. Finally, take out the two connected tubes.

[0071] In the above step 7, during the rotation and reset process of the rotating frame and the first clamping mechanism, since the first pipe support is connected to the docked pipe, the first pipe support and the first bracket cannot rotate with the rotating frame. If the first bracket rotates directly in the middle position, the first pipe support and the pipe will be twisted to a certain extent. Figure 6-13 As shown, in order to eliminate the above phenomenon, in other embodiments of the present invention, the first bracket 252 is installed on the rotating frame 22 so as to be translatable left and right via the first guide mechanism 26; it also includes a rotation-yielding drive mechanism and a reset drive device 27 installed between the rotating frame 22 and the first clamping mechanism 25; the rotation-yielding drive mechanism is used to drive the first bracket 252 to move laterally relative to the first tube support 251 (to the right in the figure), so that the first bracket 252 does not interfere with the first tube support 251 when rotating with the rotating frame 22; the reset drive device 27 is used to drive the first bracket 252 to return to its initial position directly below the rotation center of the first tube support 251. The beneficial effect of adopting the above technical solution is that after the two tubes are staggered and docked, the rotating frame and the first clamping mechanism (excluding the first tube support) can be smoothly rotated 180° and reset, making it more convenient for users to remove the tubes.

[0072] In the above embodiment,

[0073] The specific structural form of the reset drive device can be various, such as a gas rod installed on the rotating frame for pulling the first pipe support. Figure 6-13 As shown, as a preferred solution, the reset drive component 27 is a reset tension spring, and both ends of the reset tension spring are respectively connected between the first bracket 252 and the rotating frame 22.

[0074] The specific structural form of the rotation-yielding driving mechanism can be various, such as using a linear module driven by a motor, installing the first bracket on the moving block of the linear module, and controlling the movement and yielding timing of the first bracket separately through a program. Figure 6-13As shown, as a preferred solution, the rotary yielding drive mechanism includes a hook 28 and an unlocking plate 29. A hook hole 2521 is provided on the first bracket 252. The hook 28 is rotatably mounted on the first right clamping jaw 254, and the unlocking plate 29 is mounted on the rotating frame 22. The beneficial effects of adopting the above technical solution include a more ingenious design of the reset drive element and the rotary yielding drive mechanism, which are linked to the displacement of the first right clamping jaw. By controlling the opening and closing position of the first right clamping jaw, yielding, unlocking, and resetting the first bracket can be achieved, resulting in a more compact structure and greater stability.

[0075] The following combination Figure 6-13 The technical solution of the preferred embodiment shown introduces a takeover method based on a takeover machine:

[0076] Step 1: Select the first pipe holder and the second pipe holder that match the pipe to be connected, and place them on the first bracket and the second bracket respectively, and then insert the first pipe and the second pipe to be connected into the pipe receiving grooves of the pipe holder;

[0077] Step 2: The first clamping drive mechanism drives the first left clamping jaw and the first right clamping jaw to clamp together, and the second clamping drive mechanism synchronously drives the second left clamping jaw and the second right clamping jaw to clamp together. When the first right clamping jaw 254 moves to the left and closes, the hook 28 is hooked with the hook hole 2521 during the left shift process ( Figure 8 Status shown);

[0078] Step 3: The heated cutter of the cutter unit is pressed down to cut the first tube and the second tube;

[0079] Step 4: The first rotary drive mechanism drives the rotating frame and the first clamping mechanism to rotate 180° ( Figure 9 Status shown);

[0080] Step 5: The cutter of the cutter unit is lifted, and the forward and backward shift drive mechanism drives the second support base and the second clamping mechanism to move forward, so as to align the two pipe ends after the reversal;

[0081] Step 6: The second clamping drive mechanism drives the second left clamping jaw and the second right clamping jaw to open synchronously; the first clamping drive mechanism drives the first left clamping jaw and the first right clamping jaw to open, and the distance between the first left clamping jaw and the second right clamping jaw is at the set value L1. When the first right clamping jaw 254 opens to the right, it drives the hook 28 to pull the first bracket 252 to move to the right to the yielding state position (such as Figure 10 When the first bracket 252 is in the yielding position, the first bracket 252 is separated from the first tube bracket 251, and when the first bracket 252 rotates with the rotating frame, the first bracket 252 and the first tube bracket 251 do not interfere with each other;

[0082] Step 7: The first rotary drive mechanism drives the rotating frame and the first clamping mechanism to rotate 180 degrees to reset (as shown in FIG. Figure 11 Subsequently, the first clamping drive mechanism drives the first left clamping jaw and the first right clamping jaw to continue to open from the spacing L1 to the spacing L2, and the tail end of the hook 28 conflicts with the unlocking plate 29 to cause the hook 28 to rotate to the unlocking state ( Figure 13 The unlocking plate 29 and the tail end of the hook 28 are shown in the unlocking state), the hook 28 is separated from the hook hole 2521, and the first bracket 252 returns to the initial position directly below the rotation center of the first tube bracket under the action of the reset spring (as shown in the figure). Figure 12 Status shown);

[0083] Step 8. Finally, take out the two connected tubes.

[0084] In other embodiments of the present invention, to improve the quality of the weld, in step 5, when the ends of the two tubes are butted after the reversal, the forward and backward shifting drive mechanism also drives the second support seat, the second clamping mechanism, and the rear ends of the two tubes to oscillate back and forth in a forward and backward direction. The amplitude of this oscillation is preferably 0.5 mm to 1.5 mm. This reciprocating oscillation method improves the appearance of the joint between the two tubes and reduces the risk of air leaks.

[0085] like Figure 18-23 As shown, in other embodiments of the present invention, both sides of the first tube holder 251 are respectively provided with tube receiving grooves 2511 adapted to the diameter of the tube to be connected, and the first tube holder 251 is provided with an electronic device 2512, which can reflect the diameter information of the tube to be connected that is adapted to the first tube holder 251. The electronic device can be a chip with the corresponding tube diameter information written in the chip, or the electronic device can be a resistor, and the controller end determines the corresponding tube diameter information by identifying different current values ​​in the circuit; the upper surface and lower surface of the first tube holder 251 are respectively provided with first conductive contacts 2513, and the first conductive contacts 2513 are electrically connected to the electronic device 2512; the first bracket 252 is provided with a second conductive contact 2522 electrically connected to the controller; when the first tube holder 251 is placed on the first bracket 252, the first conductive contact 2513 of the first tube holder is electrically connected to the second conductive contact 2522 of the first bracket. The figure only shows the structure of the first pipe bracket and the first bracket seat. The second pipe bracket and the second bracket seat also adopt the same structural design and will not be described in detail here. The beneficial effect of the above technical solution is that the embedded electronic components in the first and second pipe brackets can facilitate the pipe connection machine to automatically read the pipe diameter information to be connected, and then automatically select the control program appropriate for the pipe diameter.

[0086] like Figure 18-23As shown, in other embodiments of the present invention, the upper surface of the first bracket 252 is provided with an elongated positioning protrusion 2523, the length of which is perpendicular to the length of the pipe to be connected. The upper and lower surfaces of the first tube holder 251 are provided with elongated positioning grooves 2514, which match the elongated positioning grooves 2514. The first conductive contact 2513 is located at the bottom surface of the elongated positioning grooves 2514, and the second conductive contact 2522 is located on the elongated positioning protrusions 2523. The figure only shows the structure of the first tube holder and the first bracket. The second tube holder and the second bracket also adopt the same structural design, which will not be repeated here.

[0087] like Figure 23 As shown, in other embodiments of the present invention, in order to facilitate the alignment of the elongated positioning protrusion 2523 of the first bracket 252 with the elongated positioning groove 2514 of the first tube support 251, a guide tip 2524 is provided at at least one end of the elongated positioning protrusion 2523.

[0088] like Figure 18-23 As shown, in other embodiments of the present invention, four magnetic poles distributed in a square are provided on the first bracket 252, and two magnetic poles are respectively provided on the front and rear sides of the long strip positioning protrusion 2523. The outer magnetism of the two magnetic poles distributed in the same row in the length direction of the long strip positioning protrusion 2523 is opposite, and the outer magnetism of the two magnetic poles distributed in the same column in the width direction of the long strip positioning protrusion 2523 is the same; the upper surface and lower surface of the first tube support 251 are respectively provided with four magnetic poles. When the upper surface or lower surface of the first tube support is in contact with the first bracket, the four magnetic poles on the surface of the first tube support and the four magnetic poles of the first bracket are attracted by opposite polarities. Figure 21 and Figure 23 A matching magnetic pole distribution is shown in Figure 21 The middle is the upper surface of the first tube support 251, the left side of the front end of the long strip positioning groove 2514 is the S magnetic pole 2515, the right side of the front end is the N magnetic pole 2516, the left side of the rear end of the long strip positioning groove 2514 is the S magnetic pole 2515, the right side of the rear end is the N magnetic pole 2516; Figure 23 The upper surface of the first bracket 252 has an S magnetic pole 2525 on the left side of the front end of the long strip positioning protrusion 2523 and an N magnetic pole 2526 on the right side of the front end. The left side of the rear end of the long strip positioning protrusion 2523 has an S magnetic pole 2525 and an N magnetic pole 2526 on the right side of the rear end. Figure 21After the top surface of the first tube support 251 rotates 180° about the center of rotation, the first tube support's S magnetic pole 2515 will align with the first support's N magnetic pole 2526, and vice versa. Furthermore, when the first tube support 251 is reversed, the magnetic poles of the first tube support 251 and the first support's 252 will repel each other, preventing the first tube support 251 from aligning with the first support's 252. The electronic components within the first tube support 251 that identify the tube diameter will lose communication with the controller circuit, indicating reverse installation. The figure only illustrates the structure of the first tube support and the first support; the second tube support and the second support also employ the same structural design and will not be further described here. The beneficial effect of adopting the above technical solution is that after the user roughly places the first tube holder and the second tube holder into the corresponding positions, they can be automatically adsorbed and aligned; the direction setting of the four magnetic poles can prevent the tube holders from being installed upside down, thereby preventing misinstallation.

[0089] like Figure 14 As shown, in some other embodiments of the present invention, the cutter unit 40 includes a cutter 41, a second rotary drive mechanism 42 and a heating device. The second rotary drive mechanism 42 is used to drive the cutter 41 to rotate, and the heating device is used to heat the cutter. The second rotary drive mechanism 42 of the cutter unit 40 is fixedly connected to the second left clamp 333. The specific structural form of the second rotary drive mechanism 42 can be various, such as using a reduction motor, or using a motor acceleration and deceleration mechanism. The beneficial effect of adopting the above technical solution is that the cutter unit moves with the second left clamp, and compared with the case where the cutter unit is fixedly installed on one side of the base, the cutter's rotating arm becomes shorter, and under a certain output torque, it can provide a greater cutting force.

[0090] Since the two tubes are heat-melted and butted in a flattened state, the welded part of the tubes will stick after butt-melting, that is, after the external force is released, the butt-melted part of the tubes is still in a flattened state. The method adopted in the prior art is to manually pinch and press the tubes into a circle after heat-melting butt-melting. The disadvantages of this operation are that it increases labor intensity and burns hands, and the timing of pressing the circle cannot be accurately controlled, which affects the pressing effect. In order to solve the above problems, Figure 14-17As shown, in some other embodiments of the present invention, a circle-pressing mechanism 50 is further included. The circle-pressing mechanism 50 is arranged between the first connecting unit 20 and the second connecting unit 30. The circle-pressing mechanism 50 includes a lifting plate 51 and a lifting drive mechanism. The lifting drive mechanism drives the lifting plate 51 to move up and down. In order to improve the circle-pressing effect, when pressing the circle, the lifting drive mechanism drives the lifting plate 51 to perform multiple up and down reciprocating movements to complete multiple pressings on the joints of the two tubes, so as to press the joints of the two tubes from a flat state into a circle. The beneficial effect of adopting the above technical solution is that the circle-pressing mechanism can automatically press the joints, so that the squeezed tubes are restored to a circular shape, ensuring smooth flow in the tubes. Compared with manual pressing, it reduces manual participation and improves the level of automation. It can also control the best circle-pressing timing through program-controlled action time of the circle-pressing mechanism to achieve the best circle-pressing effect.

[0091] In the above embodiment, the specific structural form of the lifting drive mechanism in the circular mechanism 50 can be various, such as using a vertically arranged electric push rod, or using a vertically arranged lead screw plus a vertical slide rail. Figure 14-17 As shown, in some other embodiments of the present invention, the lifting plate 51 is installed on the front side of the second support seat 31 in a liftable manner via a vertical guide mechanism, and the lifting drive mechanism includes a stopper 511 installed on the lifting plate 51 and a lever 52 connected to the frame of the cutter 41. In order to improve the lifting smoothness of the lifting plate 51 by the lever 52, the outer periphery of the stopper 511 is sleeved on a rotatable sliding sleeve to reduce the friction between the lever 52 and the stopper 511. The beneficial effect of adopting the above technical solution is that the action of the circular mechanism is linked to the cutter, and the circular action of the lifting plate of the circular mechanism is realized by means of the action of the second rotary drive mechanism of the cutter unit, which makes the structure more compact and saves manufacturing costs.

[0092] The following combination Figure 6-13 The preferred embodiment shown, and Figure 14-17 The technical solution of the preferred embodiment shown introduces a takeover method based on a takeover machine:

[0093] Step 1: Select the first pipe holder and the second pipe holder that match the pipe to be connected, and place them on the first bracket and the second bracket respectively, and then insert the first pipe and the second pipe to be connected into the pipe receiving grooves of the pipe holder;

[0094] Step 2: The first clamping drive mechanism drives the first left clamping jaw and the first right clamping jaw to clamp together, and the second clamping drive mechanism synchronously drives the second left clamping jaw and the second right clamping jaw to clamp together. When the first right clamping jaw 254 moves to the left and closes, the hook 28 is hooked with the hook hole 2521 during the left shift process ( Figure 8 Status shown);

[0095] Step 3: The heated cutter of the cutter unit is pressed down to cut the first tube and the second tube;

[0096] Step 4: The first rotary drive mechanism drives the rotating frame and the first clamping mechanism to rotate 180° ( Figure 9 Status shown);

[0097] Step 5: The cutter of the cutter unit is lifted, and the forward and backward shift drive mechanism drives the second support base and the second clamping mechanism to move forward, so as to align the two pipe ends after the reversal;

[0098] Step 6: The second clamping drive mechanism drives the second left clamping jaw and the second right clamping jaw to open; the first clamping drive mechanism drives the first left clamping jaw and the first right clamping jaw to open, and the distance between the first left clamping jaw and the second right clamping jaw is at the set value L1. When the first right clamping jaw 254 opens to the right, it drives the hook 28 to pull the first bracket 252 to move to the right to the yielding state position (such as Figure 10 When the first bracket 252 is in the yielding position, the first bracket 252 is separated from the first tube bracket 251, and when the first bracket 252 rotates with the rotating frame, the first bracket 252 and the first tube bracket 251 do not interfere with each other;

[0099] Step 7: The first rotary drive mechanism drives the rotating frame and the first clamping mechanism to rotate 180 degrees to reset (as shown in FIG. Figure 11 Subsequently, the first clamping drive mechanism drives the first left clamping jaw and the first right clamping jaw to continue to open from the spacing L1 to the spacing L2, and the tail end of the hook 28 conflicts with the unlocking plate 29 to cause the hook 28 to rotate to the unlocking state ( Figure 13 The unlocking plate 29 and the tail end of the hook 28 are shown in the unlocking state), the hook 28 is separated from the hook hole 2521, and the first bracket 252 returns to the initial position directly below the rotation center of the first tube bracket under the action of the reset spring (as shown in the figure). Figure 12 Status shown);

[0100] Step 8: The front-back shift drive mechanism drives the second support seat and the second clamping mechanism to move backward, so that the lifting plate 51 has space to lift upward; the second clamping drive mechanism drives the second left clamping jaw and the second right clamping jaw to a semi-open state (such as Figure 16 In the state shown, the distance between the second left clamping jaw and the second right clamping jaw is a set value K1). This semi-open state means that the distance K1 between the second left clamping jaw and the second right clamping jaw is smaller than the width of the second tube support in the left-right direction. The first clamping drive mechanism drives the first left clamping jaw and the first right clamping jaw to the semi-open state. This semi-open state means that the distance between the first left clamping jaw and the first right clamping jaw is smaller than the width of the first tube support in the left-right direction.

[0101] Step 9: The second rotary drive mechanism drives the cutter to swing left and right in the open state, and the lever 52 drives the lifting plate 51 to lift upward to press the weld of the two pipes (such as Figure 16 In order to improve the circle-pressing effect, the second rotary drive mechanism can drive the cutter to swing back and forth multiple times;

[0102] Step 10: The second clamping drive mechanism drives the second left clamping jaw and the second right clamping jaw to open completely, and the lifting plate falls to the lower limit position (such as Figure 17 In the state shown, the distance between the second left clamping jaw and the second right clamping jaw is K2, and the distance K2 is much larger than the width of the second tube support in the left-right direction; the first clamping drive mechanism drives the first left clamping jaw and the first right clamping jaw to fully open;

[0103] Step 11. Finally, take out the two pipes that are connected and press them into a circle.

[0104] In the present application, the specific structure of the first clamping drive mechanism can be various, such as using a motor combined with a synchronous belt to drive the first left clamping jaw and the first right clamping jaw to move synchronously in opposite directions along the translation guide rail. Specifically, the synchronous belt is wound around two transmission wheels, and the motor drives one of the transmission wheels to rotate. The first left clamping jaw is installed on the upper edge of the synchronous belt, and the second right clamping jaw is installed on the lower edge of the synchronous belt. Figure 7 As shown, in some other embodiments of the present invention, the first clamping drive mechanism 255 includes a drive motor 2551, a transmission mechanism and a bidirectional screw 2552. The drive motor 2551 drives the screw of the bidirectional screw 2552 to rotate through the transmission mechanism. The screw of the bidirectional screw 2552 is provided with a symmetrically arranged left threaded portion and a right threaded portion, and the rotation directions of the left threaded portion and the right threaded portion are opposite. A left nut is screwed on the left threaded portion, and a right nut is screwed on the right threaded portion; the first left clamping jaw 253 and the first right clamping jaw 254 are respectively fixedly installed on the left nut and the right nut of the bidirectional screw 2552. Described transmission mechanism comprises the first transmission gear 2553 that is installed at the middle position of bidirectional lead screw and the second transmission gear 2554 that is installed on the output shaft of driving motor, the first transmission gear 2553 and the second transmission gear 2554 are meshed with each other, driving motor 2551 is DC planetary gear reduction motor, driving motor 2551 is installed on the longitudinal connecting plate that is fixedly connected with rotating frame, driving motor is positioned at the below of bidirectional lead screw and the axis of driving motor is arranged parallel to the lead rod of bidirectional lead screw. The second clamping drive mechanism 335 can also adopt the same structural design as the first clamping drive mechanism, and will not be described in detail here. The beneficial effect of adopting the above-mentioned technical scheme is: adopting bidirectional lead screw can improve the consistency and stability of synchronous movement of left clamping jaw and right clamping jaw, and ensures to provide reliable clamping force.

[0105] In the present application, the specific structure of the rotary guide structure between the rotating frame 22 and the first support seat 21 can be various, such as a core shaft and a guide sleeve. The core shaft is fixedly connected to the rotation center of the rotating frame, and the guide sleeve is correspondingly installed on the first support seat. The core shaft is driven by a reduction motor fixed on the first support seat. Figure 3、 4 As shown in , 6, in some other embodiments of the present invention, the rotary guide structure 23 includes an arcuate guide rib 231 fixed on the first support seat 21 and an arcuate guide groove 232 opened on the rotating frame 22, the cross-section of the arcuate guide rib 231 is T-shaped, and the arcuate guide rib 231 slides along the arcuate guide groove 232; the first rotary drive mechanism 24 includes a rotary motor 241, a main transmission wheel 242, a transmission belt 243, a slave transmission wheel 244 and a driving gear 245, the main transmission wheel 242 is installed on the output shaft of the rotary motor 241, the transmission belt 243 is connected between the main transmission wheel 242 and the slave transmission wheel 244, the slave transmission wheel 244 and the driving gear 245 are coaxially connected, and an arcuate rack 221 is provided on the rotating frame 22, the arcuate rack 221 is a superior arc, and the driving gear 245 is engaged with the arcuate rack 221 for transmission. The beneficial effect of adopting the above technical solution is that the large-span rotary guide structure can improve the stability of the synchronous rotation of the rotating frame and the first clamping mechanism, and ensure the position accuracy of the re-hot-melting joint of the pipe after rotation.

[0106] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable ordinary technicians in this field to understand the content of the present invention and implement it. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A take-over machine, characterized in that: It comprises a base and a first connecting unit and a second connecting unit installed on the base and distributed front and back along the length direction of the connecting pipe to be connected; The first connecting pipe unit includes a first supporting seat, a rotating frame, a first rotating driving mechanism and a first clamping mechanism, the first supporting seat is fixed on the base, the rotating frame is rotatably mounted on the first supporting seat via a rotating guide structure, and the first clamping mechanism is mounted on the rotating frame; the first clamping mechanism includes a first pipe support, a first bracket, a first left clamping jaw, a first right clamping jaw and a first clamping driving mechanism, the first bracket is mounted on the rotating frame, the first pipe support is placed on the first bracket, the first left clamping jaw and the first right clamping jaw are respectively located on both sides of the first pipe support, and the first clamping driving mechanism drives the first left clamping jaw and the first right clamping jaw to synchronously approach or move away from the first pipe support; the first rotating driving mechanism is used to drive the rotating frame and the first clamping mechanism to synchronously rotate around the rotation center of the first pipe support; The second connecting pipe unit includes a second supporting seat, a front-back shifting driving mechanism and a second clamping mechanism, the second supporting seat can be movably installed on the base, and the front-back shifting driving mechanism is used to drive the second supporting seat and the second clamping mechanism to move forward and backward synchronously; the second clamping mechanism includes a second pipe support, a second bracket, a second left clamping jaw, a second right clamping jaw and a second clamping driving mechanism, the second bracket is fixed at the middle position of the second supporting seat, the second pipe support is placed on the second bracket, the second left clamping jaw and the second right clamping jaw are respectively located on both sides of the second pipe support, and the second clamping driving mechanism drives the second left clamping jaw and the second right clamping jaw to synchronously move closer to or away from the second pipe support; The cutter unit is located between the first connecting pipe unit and the second connecting pipe unit, and the cutter unit cuts the pipe between the first pipe support and the second pipe support by hot melting.

2. The pipe joining machine according to claim 1, characterized in that: The first bracket is installed on the rotating frame so as to be movably moved left and right via a first guide mechanism; the first bracket also includes a rotation-yielding drive mechanism and a reset drive device installed between the rotating frame and the first clamping mechanism; the rotation-yielding drive mechanism is used to drive the first bracket to move laterally relative to the first tube support, so that the first bracket does not interfere with the first tube support when rotating with the rotating frame; the reset drive device is used to drive the first bracket to reset and return to its initial position directly below the rotation center of the first tube support.

3. The pipe joining machine according to claim 2, characterized in that: The reset drive device is a reset spring, and both ends of the reset spring are respectively connected between the first bracket and the rotating frame; the rotation-yielding driving mechanism includes a hook claw and an unlocking plate, and the first bracket is provided with a hook hole, and the hook claw is rotatably mounted on the first right clamping jaw, and the unlocking plate is mounted on the rotating frame; when the first right clamping jaw moves to the left and closes, the hook claw is hooked and engaged with the hook hole; when the first right clamping jaw is opened to the right, the hook claw pulls the first bracket to move right to the yielding state position, and in this yielding state position, the first bracket is separated from the first tube support, and when the first bracket rotates with the rotating frame, the first bracket and the first tube support do not interfere with each other; when the first right clamping jaw continues to open to the right from the yielding state position, the tail end of the hook claw conflicts with the unlocking plate to prompt the hook claw to rotate to the unlocking state, and the hook claw is disengaged from the hook hole, and at the same time, the first bracket returns to the initial position directly below the rotation center of the first tube support under the action of the reset spring.

4. The pipe joining machine according to claim 1, characterized in that: Both sides of the first and second tube holders are respectively provided with tube receiving grooves adapted to the diameter of the tube to be connected; the first and second tube holders are respectively provided with electronic devices, which can reflect the diameter information of the tube to be connected that is adapted to the first and second tube holders; the upper and lower surfaces of the first and second tube holders are respectively provided with first conductive contacts, which are electrically connected to the electronic devices; the first and second brackets are respectively provided with second conductive contacts electrically connected to the controller; when the first tube holder is placed on the first bracket, the first conductive contact of the first tube holder is electrically connected to the second conductive contact of the first bracket; when the second tube holder is placed on the second bracket, the first conductive contact of the second tube holder is electrically connected to the second conductive contact of the second bracket.

5. The pipe joining machine according to claim 4, characterized in that: The upper surface of the first bracket and the upper surface of the second bracket are both provided with a long strip positioning protrusion, the length direction of the long strip positioning protrusion is perpendicular to the length direction of the pipe to be connected, the upper surface and lower surface of the first pipe support and the second pipe support are both provided with a long strip positioning groove, the long strip positioning groove matches the long strip positioning protrusion, the first conductive contact is located on the bottom surface of the long strip positioning groove, and the second conductive contact is located on the long strip positioning protrusion.

6. The pipe joining machine according to claim 5, characterized in that: Four magnetic poles distributed in a square are respectively provided on the first bracket and the second bracket, and two magnetic poles are respectively provided on the front and rear sides of the elongated positioning protrusion. The outer sides of the two magnetic poles distributed in the same row in the length direction of the elongated positioning protrusion have opposite magnetic properties, and the outer sides of the two magnetic poles distributed in the same column in the direction perpendicular to the length direction of the elongated positioning protrusion have the same magnetic properties; the upper surface and lower surface of the first tube support are respectively provided with four magnetic poles. When the upper surface or lower surface of the first tube support is in contact with the first bracket, the four magnetic poles on the surface of the first tube support in contact with the first bracket are attracted by the opposite polarities of the four magnetic poles of the first bracket.

7. The pipe joining machine according to claim 1, characterized in that: It also includes a circular mechanism, which is arranged between the first connecting unit and the second connecting unit. The circular mechanism includes a lifting plate and a lifting drive mechanism, and the lifting drive mechanism drives the lifting plate to move up and down.

8. The pipe joining machine according to claim 7, characterized in that: The cutter unit includes a cutter, a second rotary drive mechanism and a heating device. The second rotary drive mechanism is used to drive the cutter to rotate. The heating device is used to heat the cutter. The cutter unit is fixedly connected to the second left clamping jaw.

9. The pipe joining machine according to claim 8, characterized in that: The lifting plate is installed on the second support seat in a liftable manner via a vertical guide mechanism, and the lifting drive mechanism includes a stopper installed on the lifting plate and a shifting rod installed on the cutter.

10. The pipe joining machine according to claim 1, characterized in that: The first clamping drive mechanism and the second clamping drive mechanism both include a driving motor, a transmission mechanism and a bidirectional lead screw, the driving motor drives the lead screw of the bidirectional lead screw to rotate through the transmission mechanism, the lead screw of the bidirectional lead screw is provided with a symmetrical left threaded portion and a right threaded portion, the rotation directions of the left threaded portion and the right threaded portion are opposite, the left threaded portion is screwed with a left nut, and the right threaded portion is screwed with a right nut; the first left clamping jaw and the first right clamping jaw are respectively fixedly mounted on the left nut and the right nut of the first clamping drive mechanism; the second left clamping jaw and the second right clamping jaw are respectively fixedly mounted on the left nut and the right nut of the second clamping drive mechanism; the transmission mechanism includes a first transmission gear installed in the middle position of the bidirectional lead screw and a second transmission gear installed on the output shaft of the driving motor, the first transmission gear and the second transmission gear are meshed, and the driving motor is a DC planetary gear reduction motor; The first rotary drive mechanism includes a rotary motor, a main transmission wheel, a transmission belt, a slave transmission wheel and a driving gear. The main transmission wheel is mounted on the output shaft of the rotary motor. The transmission belt is connected between the main transmission wheel and the slave transmission wheel. The slave transmission wheel and the driving gear are coaxially connected. An arc-shaped rack is provided on the rotating frame. The arc-shaped rack is a major arc. The driving gear is meshed with the arc-shaped rack for transmission.

Images