A circle pressing mechanism, pipe connection machine and pipe connection circle pressing method

Abstract

The present invention provides a rounding mechanism, a pipe connecting machine and a pipe connecting rounding method. The pipe connecting machine includes a first pipe connecting unit and a second pipe connecting unit which are closely arranged front and back, and the pipe connecting machine also includes a heatable cutter which can pivot between the first pipe connecting unit and the second pipe connecting unit. The rounding mechanism is used on the pipe connecting machine to round the fusion joint of the butted pipes, and the rounding mechanism includes a lifting plate and a lifting drive mechanism, and the lifting drive mechanism drives the lifting plate to move up and down. The pipe connecting rounding method is that after the pipe connecting machine melts and butts the two pipes, the rounding mechanism generates an upward thrust on the butt joint of the two pipes, so that the butt joint of the two pipes is restored to a circle. The rounding mechanism can automatically press the butt joint to restore the squeezed and flattened pipe to a circle, thereby ensuring smooth flow in the pipe. Compared with manual pressing, it not only reduces manual participation and improves the level of automation, but also can control the best rounding timing through program control of the action time of the rounding mechanism to achieve the best rounding effect.

Description

Technical Field

[0001] The invention relates to the technical field of biomedical treatment, in particular to a circle pressing mechanism, a pipe connecting machine and a pipe connecting circle pressing method. Background Art

[0002] The tube connection 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 continues to be supplied to the receiving end connected to the second tube. The jointing machine cuts the first tube 91 into a first tube front section 911 and a first tube rear section 912, and cuts the second tube 92 into a second tube front section 921 and a second tube rear section 922 by a heated cutter, and then swaps the first tube front section 911 and the second tube front section 921. 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 thermoplastic hose welding device is disclosed in the US patent document with publication number US20120138235A1. The specification states that the device includes two clamping units 10 and 20, which are closely adjacent to each other, and a heatable blade 3 can be pivoted between them for cutting and welding hoses 1 and 2. The clamping units 10 and 20 both include two clamping jaws, which are indicated by 11.1 and 11.2 in the clamping unit 10 and 21.1 and 21.2 in the clamping unit 20.

[0004] In the existing connecting device, since the two pipes are hot-melt-jointed in a squeezed and flattened state, the welded part of the pipes will become sticky after the jointing, that is, after the external force is released, the joint of the pipes is still in a squeezed and flattened state. The current method is to manually pinch and press the pipes to make a circle after the hot-melt jointing. The disadvantages of this operation are: first, it increases labor intensity and will be hot, and second, the timing of pressing the circle cannot be accurately controlled, which affects the pressing effect. Summary of the invention

[0005] In order to overcome the above-mentioned deficiencies of the prior art, the object of the present invention is to provide a circle pressing mechanism, a pipe connection machine and a pipe connection circle pressing method.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention to solve its technical problem is: a rounding mechanism is used on a pipe joining machine to round the welded part of the butt-jointed pipe, the pipe joining machine includes a first pipe joining unit and a second pipe joining unit which are closely distributed front and back, and the pipe joining machine also includes a heatable cutter which can pivot between the first pipe joining unit and the second pipe joining unit; the rounding mechanism is arranged between the first pipe joining unit and the second pipe joining unit, the rounding mechanism includes a lifting plate and a lifting drive mechanism, and the lifting drive mechanism drives the lifting plate to move up and down.

[0007] A method for making a pipe joint into a circle adopts the above-mentioned circle-making mechanism. After the pipe joint machine melts and butts the two pipes, the lifting drive mechanism is activated to drive the lifting plate to move upward, generating an upward thrust on the butt joint of the two pipes, so that the butt joint of the two pipes is restored to a circle.

[0008] By adopting the technical solution of the present invention, the circle pressing mechanism can automatically press the joint to restore the squeezed tube to a circle shape, thereby ensuring smooth flow in the tube. Compared with manual pressing, it not only reduces manual participation and improves the level of automation, but also can control the action time of the circle pressing mechanism through program control to control the best circle pressing timing and achieve the best circle pressing effect.

[0009] Furthermore, the lifting plate is installed in a liftable manner at a position between the first connecting unit and the second connecting unit via a vertical guide mechanism, and the lifting drive mechanism includes a stopper installed on the lifting plate and a lever connected to the frame of the cutter. When the cutter swings left and right in an open state, the lever contacts the stopper and prompts the lifting plate to move upward.

[0010] By adopting the above preferred solution, the action of the circular pressing mechanism is linked with the cutter, and the circular pressing action of the lifting plate of the circular pressing mechanism is realized by means of the action of the cutter, so that the structure is more compact and the manufacturing cost is saved.

[0011] Furthermore, the outer periphery of the stopper is sleeved on a rotatable sliding sleeve.

[0012] By adopting the above preferred solution, the friction between the lever and the stopper can be reduced, and the smoothness of lifting the lifting plate by the lever can be improved.

[0013] Furthermore, the vertical guide mechanism is provided with a limit piece for limiting the lowering position of the lifting plate.

[0014] By adopting the above preferred solution, after the lifting plate automatically descends, the limit member can limit the lifting plate to the lowest limit position so that the lever can stably resist and apply force to the stop member.

[0015] Furthermore, the lifting drive mechanism drives the lifting plate to reciprocate up and down for multiple times, and performs multiple circular movements on the joint between the two pipes.

[0016] Furthermore, the lifting drive mechanism drives the lifting plate to rise to a different height each time, and the pressing amplitude of the joint between the two pipes is different each time.

[0017] By adopting the above preferred solution, the circle pressing effect and efficiency are improved through multiple pressings with different amplitudes.

[0018] A pipe connecting machine comprises 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;

[0019] a cutter unit including a heatable cutter pivotable between a first connecting pipe unit and a second connecting pipe unit;

[0020] The circular pressing mechanism is arranged between the first connecting unit and the second connecting unit.

[0021] Further, the first connecting 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 tube 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 tube 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 tube 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 tube 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 tube support;

[0022] The second connecting pipe unit includes a second supporting seat, a front-to-back shifting driving mechanism and a second clamping mechanism. The second supporting seat can be installed on the base movably forward and backward. The front-to-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 tube support, a second supporting seat, a second left clamping jaw, a second right clamping jaw and a second clamping driving mechanism. The second supporting seat is fixed at the middle position of the second supporting seat. The second tube support is placed on the second supporting seat. The second left clamping jaw and the second right clamping jaw are respectively located on both sides of the second tube support. The second clamping driving mechanism drives the second left clamping jaw and the second right clamping jaw to move toward or away from the second tube support synchronously.

[0023] The cutter unit comprises a cutter, a second rotary drive mechanism and a heating device, wherein the second rotary drive mechanism is used to drive the cutter to rotate, and the heating device is used to heat the cutter; the cutter unit is fixedly connected to the second left clamp.

[0024] A method for pipe joining and forming a circle, using the pipe joining machine mentioned above,

[0025] After the pipe joining machine has melted and butted the two pipes, the front-rear shift drive mechanism drives the second support seat and the second clamping mechanism to move backwards, so that the lifting plate has space to lift upwards;

[0026] The second clamping drive mechanism drives the second left clamping jaw and the second right clamping jaw to a semi-open state;

[0027] The first clamping drive mechanism drives the first left clamping jaw and the first right clamping jaw to a semi-open state;

[0028] The second rotary drive mechanism drives the cutter to swing left and right in the open state, and the lever drives the lifting plate to lift upward to press the welding point of the two pipes.

[0029] Furthermore, the second rotary drive mechanism drives the cutter to swing back and forth multiple times, and the lever drives the lifting plate to lift upward to press the welding point of the two pipes multiple times.

[0030] By adopting the above-mentioned preferred solution, when the first clamping mechanism and the second clamping mechanism of the pipe connecting machine are clamped, the corresponding left clamping jaw and the right clamping jaw both adopt a synchronous centering movement mode, the first pipe support and the second pipe support are in the middle position and do not shift, and during the clamping and closing process, the positions of the first pipe and the second pipe to be connected remain in place and do not move, 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 in rotational reversing, adopts a rotating frame together with the first clamping mechanism to rotate as a whole, so that the steering is smoother and the docking position is more accurate, reducing the occurrence of misalignment and adhesion at the docking point of the two pipes and improving the smoothness of the circle pressing. The action of the circle pressing mechanism is linked with the cutter, and the circle pressing action of the lifting plate of the circle pressing 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. 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0032] Figure 1 This is the status diagram of the first two pipes.

[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 diagrams of the pipe connection machine of the present invention.

[0035] Figure 4 It is the second stereogram of the pipe connection machine of the present invention.

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

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

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

[0039] Figure 8-Figure 12 It is the action principle diagram of the first connecting unit during the process of two tubes flipping and connecting.

[0040] Fig.13 is with Fig.12 A schematic diagram of the partial structure of the first connecting unit hiding the rotating frame in the corresponding state.

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

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

[0043] Fig.16 It is the action principle diagram of the circular mechanism when the second connecting unit is in a semi-open state.

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

[0045] Fig.18 It is one of the three-dimensional diagrams showing the matching state of the first tube support and the first bracket.

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

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

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

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

[0050] Fig.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 rack; 23-rotating guide structure; 231-arc guide rib; 232-arc guide groove; 24-first rotary drive mechanism; 241-rotating motor; 242-main drive wheel; 243-drive belt; 244-slave drive wheel; 245-drive gear; 25-first clamping mechanism; 251-first pipe support; 2511-pipe Accommodating groove; 2512-electronic device; 2513-first conductive contact; 2514-long strip positioning groove; 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 clamp; 2531-squeeze Wall pressing body; 254-first right clamping jaw; 255-first clamping driving mechanism; 2551-driving motor; 2552-bidirectional lead screw; 2553-first transmission gear; 2554-second transmission gear; 26-first guide mechanism; 27-reset driving device; 28-hook claw; 29-unlocking plate; 30-second pipe unit; 31-second support seat; 32-front and rear shift driving mechanism; 33-second clamping mechanism; 331-second pipe Support; 332-second support seat; 333-second left clamp; 334-second right clamp; 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 be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

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

[0055] like Figure 3As shown, 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; a cutter unit 40 is located between the first pipe connecting unit 20 and the second pipe connecting unit 30, and the cutter unit 40 uses hot melting to cut the pipe located between the first pipe support 251 and the second pipe support 331.

[0056] like Figure 14-17 As shown, a circle pressing mechanism 50 is provided between the first pipe unit 20 and the second pipe unit 30. The circle pressing mechanism 50 includes a lifting plate 51 and a lifting drive mechanism, and 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 pressing of the joint of the two pipes, so as to press the joint of the two pipes from a flat state to a circle.

[0057] A method for making the pipe joint into a circle: after the pipe joint machine melts and butts the two pipes, the lifting drive mechanism is activated to drive the lifting plate 51 to move upward, generating an upward thrust on the butt joint of the two pipes, so that the butt joint of the two pipes is restored to a circle.

[0058] The beneficial effect of adopting the above technical solution is that the circle pressing mechanism can automatically press the joint to restore the squeezed tube to a round shape, ensuring smooth flow in the tube. Compared with manual pressing, it not only reduces manual participation and improves the level of automation, but also can control the action time of the circle pressing mechanism through program control to control the best circle pressing time and achieve the best circle pressing effect.

[0059] 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 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 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: 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, so that the structure is more compact and the manufacturing cost is saved.

[0060] like Figure 3-6 As shown in 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;

[0061] The first pipe unit 20 includes a first support seat 21, a rotating frame 22, a first rotating drive mechanism 24 and a first clamping mechanism 25. The first support seat 21 is fixed on the base 10. The rotating frame 22 is rotatably mounted on the first support seat 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 support 251, a first support seat 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 installed on the rotating frame 22, 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 both sides of the first tube support 251, and the first clamping driving mechanism 255 drives the first left clamping jaw 253 and the first right clamping jaw 254 to synchronously approach or move away from the first tube support 251; the first rotating driving 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;

[0062] The second pipe unit 30 includes a second support seat 31, a front-and-rear shift driving mechanism 32 and a second clamping mechanism 33. The second support seat 31 can be installed on the base 10 so as to be movable back and forth. The front-and-rear shift driving mechanism 32 is used to drive the second support 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 seat 332, a second left clamping jaw 333, a second right clamping jaw 334 and a second clamping driving mechanism 335. The second bracket seat 332 is fixed at the middle position of the second support seat 31. The second tube support 331 is placed on the second bracket seat 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 toward or away from the second tube support 331 synchronously.

[0063] The cutter unit 40 is located between the first connecting pipe unit 20 and the second connecting pipe unit 30. The cutter unit 40 cuts off the pipe between the first pipe support 251 and the second pipe support 331 by hot melting.

[0064] The circular pressing mechanism 50 is arranged between the first connecting unit 20 and the second connecting unit 30. The circular pressing mechanism 50 includes a lifting plate 51 and a lifting drive mechanism. 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.

[0065] The beneficial effects of the above technical solution are as follows: when the first clamping mechanism and the second clamping mechanism are clamped, the corresponding left and right clamping jaws both adopt a synchronous centering movement mode, the first tube support and the second tube support are in the middle position and do not shift, and the first tube and the second tube to be joined remain in place and do not move, ensuring that the actual joining position is consistent with the target position initially placed by the user, reducing the waste of liquid in the tube and improving the utilization rate. The first connecting unit, which plays a role in rotational reversing, adopts a rotating frame together with the first clamping mechanism to rotate as a whole, occupies less space in the left and right directions, and the connecting machine as a whole is more compact. 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.

[0066] In the present application, the rotation center of the rotating frame 22 is coaxial with the rotation center 2517 of the first tube support 251. The tube receiving grooves on both sides of the first tube support 251 are in an axisymmetric state. After the first tube support 251 rotates 180 degrees around its rotation center, the tube receiving grooves on both sides can overlap with those before the rotation and transposition, thus ensuring that the first tube and the second tube are accurately connected after being cut and swapped.

[0067] like Figure 7 and 14 As shown, as is common with the existing connecting machine, an extrusion wall 2531 is provided on the end faces opposite to the first left clamp 253 and the second left clamp 333, as well as on the end faces opposite to the first right clamp 254 and the second right clamp 334. After the extrusion wall is clamped 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.

[0068] like Figure 6-13 As shown, in some other embodiments of the present invention, the first bracket 252 can be installed on the rotating frame 22 in a left-right translational manner via the first guide mechanism 26; it also includes a rotation-yielding driving mechanism and a reset driving device 27 installed between the rotating frame 22 and the first clamping mechanism 25; the rotation-yielding driving mechanism is used to drive the first bracket 252 to move laterally relative to the first tube support 251 (moving 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 driving device 27 is used to drive the first bracket 252 to reset and return to the 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, so as to make it more convenient for users to take the tubes.

[0069] In the above embodiment, 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 6-13As shown, as a preferred solution, the reset drive device 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.

[0070] The specific structural form of the rotational 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 moving yielding timing of the first bracket separately through a program. Figure 6-13 As shown, as a preferred solution, the rotational yielding driving 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 are: the design of the reset driving device and the rotational yielding driving mechanism is more ingenious, and a linkage design is carried out with the displacement of the first right clamping jaw. The yielding, unlocking and resetting of the first bracket can be achieved by controlling the opening and closing position of the first right clamping jaw, and the structure is more compact and the stability is more reliable.

[0071] like Figure 18-23 As shown, in other embodiments of the present invention, both sides of the first tube support 251 are respectively provided with tube receiving grooves 2511 adapted to the diameter of the tube to be connected, and the first tube support 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 support 251. The electronic device can be a chip with the corresponding tube diameter information written in the chip, and the electronic device can also be a resistor. The controller end determines the corresponding tube diameter information by identifying different current values ​​in the circuit; the upper surface and the lower surface of the first tube support 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 support 251 is placed on the first bracket 252, the first conductive contact 2513 of the first tube support is conductive with the second conductive contact 2522 of the first bracket. The figure only shows the structure of the first pipe support and the first bracket, and the second pipe support and the second bracket also adopt the same structural design, which will not be described in detail here. The beneficial effect of adopting the above technical solution is that the electronic devices embedded in the first pipe support and the second pipe support can facilitate the pipe connection machine to automatically read the pipe diameter information to be connected, and then automatically select the control program suitable for the pipe diameter.

[0072] like Figure 18-23As shown, in other embodiments of the present invention, the upper surface of the first bracket 252 is provided with a long strip positioning protrusion 2523, the length direction of the long strip positioning protrusion 2523 is perpendicular to the length direction of the pipe to be connected, the upper surface and the lower surface of the first tube bracket 251 are provided with a long strip positioning groove 2514, the long strip positioning groove 2514 matches the long strip positioning protrusion 2523, the first conductive contact 2513 is located at the bottom surface of the long strip positioning groove 2514, and the second conductive contact 2522 is located on the long strip positioning protrusion 2523. Only the structure of the first tube bracket and the first bracket is shown in the figure, and the second tube bracket and the second bracket also adopt the same structural design, which will not be repeated here.

[0073] 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 sides of the two magnetic poles distributed in the same row in the length direction of the long strip positioning protrusion 2523 have opposite magnetism, and the outer sides of the two magnetic poles distributed in the same column in the width direction of the long strip positioning protrusion 2523 have the same magnetism. The upper surface and the lower surface of the first tube support 251 are respectively provided with four magnetic poles. When the upper surface or the 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. Fig.21 and Fig.23 A matching magnetic pole polarity distribution is shown in Fig.21 The upper surface of the first tube support 251 is shown in the middle. The S magnetic pole 2515 is on the left side of the front end of the long strip positioning groove 2514, and the N magnetic pole 2516 is on the right side of the front end. The S magnetic pole 2515 is on the left side of the rear end of the long strip positioning groove 2514, and the N magnetic pole 2516 is on the right side of the rear end. Fig.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 S magnetic pole 2525 is on the left side of the rear end of the long strip positioning protrusion 2523 and an N magnetic pole 2526 on the right side of the rear end. Fig.21 After the upper surface of the first tube support 251 shown rotates 180° around the center of rotation, the S magnetic pole 2515 of the first tube support will be attracted to the N magnetic pole 2526 of the first bracket, and the N magnetic pole 2516 of the first tube support will be attracted to the S magnetic pole 2525 of the first bracket. The figure only shows the structure of the first tube support and the first bracket. The second tube support and the second bracket also adopt the same structural design, which will not be repeated here. The beneficial effect of adopting the above technical solution is that after the user puts the first tube support and the second tube support roughly into the corresponding position, they can be automatically adsorbed and aligned; the direction setting of the four magnetic poles can prevent the tube support from being installed upside down, and play a role in preventing misinstallation.

[0074] like Fig.14As 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, the heating device is used to heat the cutter, and 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 cutter unit being fixedly installed on one side of the base, the rotating arm of the cutter becomes shorter, and under a certain output torque, it can provide a greater cutting force.

[0075] 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 driving motor 2551, a transmission mechanism and a bidirectional lead screw 2552. The driving motor 2551 drives the lead screw of the bidirectional lead screw 2552 to rotate through the transmission mechanism. The lead screw of the bidirectional lead 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 clamp 253 and the first right clamp 254 are respectively fixedly installed on the left nut and the right nut of the bidirectional lead screw 2552. The transmission mechanism includes a first transmission gear 2553 installed at the middle position of the bidirectional lead screw and a second transmission gear 2554 installed on the output shaft of the drive motor. The first transmission gear 2553 and the second transmission gear 2554 are meshed with each other. The drive motor 2551 is a DC planetary gear reduction motor. The drive motor 2551 is installed on a longitudinal connecting plate fixedly connected to the rotating frame. The drive motor is located below the bidirectional lead screw and the axis of the drive motor is arranged parallel to the lead screw of the bidirectional lead screw. The second clamping drive mechanism 335 can also adopt the same structural design as the first clamping drive mechanism, which will not be repeated here. The beneficial effect of adopting the above technical solution is that the use of the bidirectional lead screw can improve the consistency and stability of the synchronous movement of the left clamping jaw and the right clamping jaw, ensuring the provision of reliable clamping force.

[0076] 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, the guide sleeve is correspondingly installed on the first support seat, and the core shaft is driven by a reduction motor fixed on the first support seat. Figure 3 , 4As 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 meshed 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-melt docking of the pipe after rotation.

[0077] The following combination Figure 6-13 The preferred embodiment shown in FIG. Figure 14-17 The technical solution of the preferred embodiment shown introduces a take-over method based on a take-over machine:

[0078] Step 1, select a first pipe holder and a second pipe holder that match the pipe to be connected, and place them on the first bracket and the second bracket accordingly, and then insert the first pipe and the second pipe to be connected into the pipe receiving grooves of the pipe holders;

[0079] 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 claw 28 is hooked and matched with the hook hole 2521 during the left shifting process ( Figure 8 status shown);

[0080] Step 3, the heated cutter of the cutter unit is pressed down to cut the first tube and the second tube;

[0081] Step 4: The first rotary drive mechanism drives the rotating frame and the first clamping mechanism to rotate 180° ( Fig. 9 status shown);

[0082] Step 5, the cutter of the cutter unit is lifted, and the front-back shift driving mechanism drives the second support seat and the second clamping mechanism to move forward, so as to butt the two pipe ends after the reversal;

[0083] 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 claw 28 to pull the first bracket 252 to move to the right to the yielding state position (such as Fig.10 When the first bracket 252 is in the yielding state, 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;

[0084] Step 7: The first rotating drive mechanism drives the rotating frame and the first clamping mechanism to rotate 180° to reset (eg Fig.11 Then, 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 abuts against the unlocking plate 29 to cause the hook 28 to rotate to the unlocking state ( Fig.13 The unlocking plate 29 and the rear 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 FIG. Fig.12 status shown);

[0085] Step 8: The front-rear 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 be lifted 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 Fig.16 In the state shown, the distance between the second left clamping jaw and the second right clamping jaw is a set value K1), and 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 a semi-open state, and 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;

[0086] 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 welding point of the two pipes (such as Fig.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;

[0087] Step 10: The second clamping drive mechanism drives the second left clamping jaw and the second right clamping jaw to fully open, and the lifting plate falls to the lower limit position (such as Fig.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;

[0088] Step 11, finally take out the two pipes that are connected and press into a circle.

[0089] In other embodiments of the present invention, in order to improve the quality of the welding of the two tubes, in the above step 5, when the two tube ends are butted after the reversal, the front-to-back displacement drive mechanism also drives the second support seat, the second clamping mechanism and the rear sections of the two tubes to perform reciprocating oscillation in the front-to-back direction, and the amplitude of the front-to-back reciprocating oscillation is preferably 0.5mm-1.5mm. Through the above reciprocating oscillation joining method, the joint of the two tubes is more beautiful and it is not easy to have air leaks at the joint.

[0090] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable ordinary technicians in the field to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A rounding mechanism, used on a pipe joining machine to round the welded part of a butt-jointed pipe, the pipe joining machine comprising a first pipe joining unit and a second pipe joining unit closely arranged front and back, and the pipe joining machine further comprising a heatable cutter pivotable between the first pipe joining unit and the second pipe joining unit, characterized in that: The circular pressing mechanism is arranged between the first connecting unit and the second connecting unit, and the circular pressing mechanism comprises a lifting plate and a lifting driving mechanism, and the lifting driving mechanism drives the lifting plate to move up and down; The lifting plate is installed in a liftable manner between the first connecting unit and the second connecting unit via a vertical guide mechanism. The lifting drive mechanism includes a stopper installed on the lifting plate and a lever connected to the frame of the cutter. When the cutter swings left and right in an open state, the lever contacts the stopper and prompts the lifting plate to move upward.

2. The circular pressing mechanism according to claim 1, characterized in that: The outer periphery of the stopper is sleeved on the rotatable sliding sleeve.

3. The circular pressing mechanism according to claim 1, characterized in that: The vertical guide mechanism is provided with a limiting member for limiting the lowermost position of the jacking plate.

4. 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; a cutter unit including a heatable cutter pivotable between a first connecting pipe unit and a second connecting pipe unit; A circular pressing mechanism as claimed in any one of claims 1 to 3.

5. The take-over machine according to claim 4, characterized in that: The first connecting unit comprises a first supporting seat, a rotating frame, a first rotating driving mechanism and a first clamping mechanism, wherein 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 comprises a first tube 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 tube 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 tube 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 tube 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 tube support; The second connecting pipe unit includes a second supporting seat, a front-to-back shifting driving mechanism and a second clamping mechanism. The second supporting seat can be installed on the base movably forward and backward. The front-to-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 tube support, a second supporting seat, a second left clamping jaw, a second right clamping jaw and a second clamping driving mechanism. The second supporting seat is fixed at the middle position of the second supporting seat. The second tube support is placed on the second supporting seat. The second left clamping jaw and the second right clamping jaw are respectively located on both sides of the second tube support. The second clamping driving mechanism drives the second left clamping jaw and the second right clamping jaw to move toward or away from the second tube support synchronously. The cutter unit comprises a cutter, a second rotary drive mechanism and a heating device, wherein the second rotary drive mechanism is used to drive the cutter to rotate, and the heating device is used to heat the cutter; the cutter unit is fixedly connected to the second left clamp.

6. A method for connecting a pipe and pressing a circle, based on the pressing circle mechanism according to claim 1, characterized in that: After the connecting machine has melted and butted the two pipes, the lifting drive mechanism is activated to drive the lifting plate to move upward, generating an upward thrust on the butt joint of the two pipes, so that the butt joint of the two pipes returns to a circular shape.

7. The pipe connection method according to claim 6, characterized in that: The lifting drive mechanism drives the lifting plate to move up and down for multiple times, and performs multiple circular movements on the joints of the two pipes.

8. A method for pipe joining in a circle, based on the pipe joining machine according to claim 5, characterized in that: After the pipe joining machine has melted and butted the two pipes, the front-rear shift drive mechanism drives the second support seat and the second clamping mechanism to move backwards, so that the lifting plate has space to lift upwards; The second clamping drive mechanism drives the second left clamping jaw and the second right clamping jaw to a semi-open state; The first clamping drive mechanism drives the first left clamping jaw and the first right clamping jaw to a semi-open state; The second rotary drive mechanism drives the cutter to swing left and right in the open state, and the lever drives the lifting plate to lift upward to press the welding point of the two pipes.

9. The pipe connection method according to claim 8, characterized in that: The second rotary drive mechanism drives the cutter to swing back and forth for multiple times, and the lever drives the lifting plate to lift upward to press the welding point of the two pipes for multiple times.

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