A D-shaped heat exchange tube forming device

Abstract

The present invention relates to the field of heat exchange tube forming, and specifically, to a D-shaped heat exchange tube forming device, which includes a workbench and a gantry arranged on the workbench; inside the gantry, there is a U-shaped mounting plate capable of reciprocating in the vertical direction, and inside the U-shaped mounting plate, a plurality of forming concave rollers capable of rotating at equal intervals are arranged; on the workbench, there is a forming mechanism capable of cooperating with the forming concave rollers to extrude a circular tube into a D-shaped tube, at one end of the top of the workbench away from the gantry, there is a vertical plate, at the center of the vertical plate, there is a vertical through groove, and inside the vertical through groove, there is an internal support mechanism for supporting the inner wall of the circular tube. Through the cooperation of the internal support mechanism, the forming mechanism and the forming concave rollers, the present invention can support the inner and outer walls of the D-shaped heat exchange tube synchronously during forming, so as to ensure the forming effect of the D-shaped heat exchange tube.

Description

Technical Field

[0001] The invention relates to the field of heat exchange tube forming, and in particular to a D-shaped heat exchange tube forming device. Background Art

[0002] The heat exchange tube is one of the components of the heat exchanger. It is placed inside the cylinder and is used for heat exchange between two media. There are many types of heat exchange tubes. Among them, the D-shaped heat exchange tube can increase the heat exchange area and improve the heat exchange efficiency due to its special shape during heat exchange. The D-shaped heat exchange tube needs to be processed by a forming device on the round tube for production.

[0003] Chinese patent: CN218224279U discloses a D-shaped heat exchange tube forming mold, which includes a fixed frame, a movable part slidably connected to the fixed frame, a forming die connected to the fixed frame, and a forming die connected to the movable part, wherein the forming die is used to accommodate the heat exchange tube, the movable part can drive the forming die to approach or move away from the forming die, and when the forming die approaches the forming die, the forming die and the forming die enclose a D-shaped forming cavity, the height of the D-shaped forming cavity gradually decreases from one end to the other end along the length direction, and the forming die can squeeze the heat exchange tube located in the D-shaped forming cavity.

[0004] In this patent, the round tube is extruded and formed by the cooperation of the forming die and the forming pressure die. However, during use, since the outer walls and the interior of the D-shaped heat exchange tube are not supported, the round tube may be over-extruded, causing excessive deformation of the round tube, thus affecting the forming effect. Summary of the invention

[0005] The main purpose of the present invention is to provide a D-shaped heat exchange tube forming device, which is equipped with a side pressure roller and an internal support mechanism to synchronously support the inner and outer walls of the D-shaped heat exchange tube during forming, thereby ensuring the forming effect of the D-shaped heat exchange tube.

[0006] To achieve the above object, the present invention provides a D-shaped heat exchange tube forming device, including a workbench, a C-shaped mounting plate, a forming mechanism, an inner support mechanism and a guiding mechanism; a gantry is arranged on the workbench, and two hydraulic rods are vertically and mirror-image arranged at the top of the gantry. The actuating parts of the two hydraulic rods pass through the gantry and are connected to the bottom of the C-shaped mounting plate. The opening direction of the C-shaped mounting plate faces the workbench direction, and a plurality of forming concave rollers are rotatably arranged at equal intervals inside the C-shaped mounting plate; the forming mechanism is arranged on the workbench and is located below the C-shaped mounting plate, and the forming mechanism includes a plurality of guiding slide rails arranged at equal intervals; two L-shaped sliding strips are slidably arranged in each guiding slide rail, and a side pressing roller is rotatably arranged at one end of each L-shaped sliding strip away from the guiding slide rail; two fixing plates are mirror-image arranged on each guiding slide rail, and a horizontal roller is rotatably arranged between the two fixing plates; an extrusion cavity is formed between the horizontal roller, the two side pressing rollers and the corresponding forming concave roller; a vertical plate is arranged at one end of the workbench top away from the gantry, a vertical through groove is arranged at the center of the vertical plate, a sliding block is slidably arranged in the vertical through groove, and an installation groove is arranged at the center of the sliding block; the inner support mechanism is arranged in the installation groove and supports the inner wall of the pipe when the side pressing roller and the horizontal roller extrude the pipe; the inner support mechanism includes a rectangular pipe fixedly arranged in the installation groove, one end of the rectangular pipe away from the sliding block sequentially passes through a plurality of extrusion cavities, a plurality of rectangular sleeves are arranged at equal intervals along the length direction of the rectangular pipe, first extension holes are arranged on the outer walls on both sides of each rectangular sleeve, a first抵触杆 is slidably arranged in each first extension hole, a connecting shaft is rotatably arranged at one end of each first抵触杆 away from the corresponding rectangular sleeve, the connecting shaft is arranged vertically and an inner side roller is further arranged at the lower end of the connecting shaft, a first telescopic roller is further arranged at the upper end of each connecting shaft, extension strips are arranged on the outer wall of each first抵触杆, and a second telescopic roller is rotatably arranged between the two extension strips; the guiding mechanism is arranged on the workbench and is located on the side of the gantry away from the vertical plate, and the guiding mechanism is used to push the to-be-processed round pipe into the extrusion cavity.

[0007] It should be noted that there may be some inaccuracies in the text as there is an unclear "第一抵触杆" which should be a specific Chinese term. You may need to check and correct it according to the actual situation.Preferably, the inner support mechanism further includes a guiding bar and a driving motor; the guiding bar is slidably disposed inside the rectangular tube, and a plurality of first triangular guiding plates are equidistantly arranged on the outer walls of both sides of the guiding bar along the length direction. On the outer walls of both sides of the rectangular tube along the length direction, first strip-shaped avoidance grooves are provided for avoiding the first triangular guiding plates. One end of each first抵触杆靠近引导条的一端设置有与第一三角形引导板配合的第一弧形引导块,矩形套两侧内壁设置有用于容纳第一弧形引导块的第一矩形缺槽,第一矩形缺槽与对应第一延伸孔相互连通,每个矩形套两侧内壁还设置有用于避让第一三角形引导板的第一条形穿槽,第一条形穿槽与对应第一矩形缺槽连通;滑动块上设置有L形安装板,驱动电机设置在L形安装板上,引导条靠近驱动电机的一侧沿长度方向设置有多个齿槽,驱动电机的电机轴上设置有驱动齿轮,驱动齿轮与引导条上的齿槽啮合;每个第一抵触杆上还套设有第一复位弹簧,第一复位弹簧位于第一矩形缺槽内部。

[0008] Preferably, a second extension hole is further provided at the center of the top of each rectangular sleeve. A second抵触杆 is slidably disposed in each second extension hole, and the second抵触杆 is vertically arranged. An arc-shaped support block is provided at the top end of the second抵触杆, and a second arc-shaped guiding block is provided at the lower end of the second抵触杆. A second rectangular notch for avoiding the second arc-shaped guiding block is provided on the inner wall of the top of the rectangular sleeve. A plurality of second triangular guiding plates for cooperating with the second arc-shaped guiding block are equidistantly arranged on the top of each guiding bar along the length direction. A second strip-shaped through groove for avoiding the second triangular guiding plate is provided on the top of the rectangular tube; a second return spring is further sleeved on each second抵触杆, and the second return spring is located in the corresponding second rectangular notch.

[0009] Preferably, a bidirectional lead screw is rotatably disposed in each guiding slide rail. The L-shaped slide bar is threadedly connected to the end of the corresponding bidirectional lead screw. An adjusting motor for driving the bidirectional lead screw to rotate is further provided on each guiding slide rail.

[0010] Preferably, a conical portion is further provided at one end of each first telescopic roller away from the connecting shaft.

[0011] Preferably, a synchronization mechanism for driving a plurality of forming concave rollers to rotate synchronously is further provided on the C-shaped mounting plate.

[0012] Preferably, the synchronization mechanism includes a double-shaft motor and a timing belt; extension shafts are provided at both ends of each forming concave roller. Both extension shafts pass through the C-shaped mounting plate and are provided with driven wheels. The double-shaft motor is provided at the center of the bottom of the C-shaped mounting plate. Driving wheels are provided at both ends of the double-shaft motor, and the driving wheels are drivingly connected to the corresponding plurality of driven wheels through the timing belt.

[0013] It should be noted that there are some unclear terms like "第一抵触杆" and "第二抵触杆" in the original text which may need to be further clarified according to the actual context for a more accurate translation.Preferably, the guiding mechanism includes a guiding frame and a guiding motor; the guiding frame is arranged on the workbench in a vertical state and is located on the side of the gantry away from the vertical plate; a fixed concave roller is rotatably arranged in the guiding frame, the guiding motor is arranged on the outer wall of the guiding frame and is used to drive the fixed concave roller to rotate, and downward pressure grooves are also arranged on the inner walls on both sides of the guiding frame, and a downward pressure block is slidably arranged in each downward pressure groove, and a sliding concave roller is rotatably arranged between the two downward pressure blocks, and a downward pressure spring is arranged on the top of each downward pressure block, and the downward pressure spring is located inside the corresponding downward pressure groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention cooperates with the guide bar and the rectangular sleeve. When the D-shaped heat exchange tube is processed, the rectangular sleeve is located inside the circular tube to be processed. By moving the guide bar, the first interference rod and the second interference rod can both move synchronously in the direction away from the guide bar. The inner roller, the first telescopic roller and the second telescopic roller arranged on the first interference rod can interfere with the plane inner wall of the D-shaped heat exchange tube. The arc-shaped support block on the second interference rod can interfere with the arc-shaped inner wall of the D-shaped heat exchange tube. The side pressure roller, the horizontal roller and the forming concave roller cooperate with each other, so that the inner and outer walls of the D-shaped heat exchange tube can be supported synchronously when the D-shaped heat exchange tube is processed, thereby ensuring the forming effect.

[0016] 2. The present invention provides a conical portion on the first telescopic roller. As the round tube enters, the inner wall of the round tube can contact the first telescopic roller, so that the first telescopic roller can adaptively expand and contract. At this time, the conical portion at the end of the first telescopic roller can contact and support the intersection of the arc surface and the right-angle surface of the D-shaped heat exchange tube, thereby further improving the forming effect of the D-shaped heat exchange tube.

[0017] 3. The present invention cooperates with the forming concave roller and the fixed concave roller, and under the drive of the double-axis motor and the guide motor, the round tube to be processed can move back and forth along its axis, so that the round tube can be extruded multiple times in the forming cavity, ensuring the D-shaped heat exchange tube forming effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention, so that other features, purposes and advantages of the present invention become more obvious. The accompanying drawings of the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 The present invention is a three-dimensional Figure 1 ;

[0020] Figure 2 The present invention is a three-dimensional Figure 2 ;

[0021] Figure 3 is Figure 2 The partial enlarged view of part A in

[0022] Figure 4 is Figure 2 The partial enlarged view of part B in

[0023] Figure 5 The partial three - dimensional Figure 1 ;

[0024] Figure 6 is Figure 5 The partial enlarged view of part C in

[0025] Figure 7 is Figure 5 The partial enlarged view of part D in

[0026] Figure 8 The partial three - dimensional exploded view of the present invention Figure 1 ;

[0027] Fig. 9 The partial three - dimensional Figure 2 ;

[0028] Fig.10 The partial three - dimensional exploded view of the present invention Figure 2 ;

[0029] Fig.11 The three - dimensional cross - sectional view of the rectangular sleeve in the present invention.

[0030] The reference numerals in the above figures are as follows:

[0031] 1 - Workbench; 11 - Gantry; 12 - Hydraulic rod; 13 - Vertical plate; 131 - Vertical through - slot; 132 - Slide block; 1321 - Resisting spring; 133 - Installation groove; 134 - L - shaped mounting plate;

[0032] 2 - C - shaped mounting plate; 21 - Forming concave roller; 22 - Extension shaft; 23 - Driven wheel;

[0033] 3 - Forming mechanism; 31 - Guiding slide rail; 311 - Bi - directional lead screw; 312 - Adjusting motor; 32 - L - shaped slide bar; 33 - Side pressing roller; 34 - Fixed plate; 35 - Horizontal roller; 36 - Extrusion cavity;

[0034] 4-inner support mechanism; 41-rectangular tube; 411-first strip avoidance groove; 412-second strip avoidance groove; 42-rectangular sleeve; 421-first extension hole; 422-first rectangular notch; 423-first strip through groove; 424-second extension hole; 4241-second abutment rod; 4242-arc support block; 4243-second arc guide block; 4244-second return spring; 425-second rectangular notch; 42 6-second strip-shaped through groove; 43-first abutting rod; 431-extension bar; 432-second telescopic roller; 433-first arc-shaped guide block; 434-first return spring; 44-connecting shaft; 441-inner roller; 442-first telescopic roller; 443-conical part; 45-guide bar; 451-first triangular guide plate; 452-tooth groove; 453-second triangular guide plate; 46-driving motor; 461-driving gear;

[0035] 5-guiding mechanism; 51-guiding frame; 511-fixed concave roller; 512-pressing groove; 513-pressing block; 514-sliding concave roller; 515-pressing spring; 52-guiding motor;

[0036] 6-synchronous mechanism; 61-dual-axis motor; 611-driving wheel; 62-synchronous belt. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0038] See also Figures 1 to 11As shown in the figure, a D-shaped heat exchange tube forming device includes a workbench 1, a U-shaped mounting plate 2, a forming mechanism 3, an inner support mechanism 4, and a guiding mechanism 5. A gantry 11 is provided on the workbench 1. At the top of the gantry 11, two hydraulic rods 12 are vertically and mirror-symmetrically arranged. The actuating parts of the two hydraulic rods 12 pass through the gantry 11 and are connected to the bottom of the U-shaped mounting plate 2. The opening direction of the U-shaped mounting plate 2 faces the direction of the workbench 1. A plurality of forming concave rollers 21 are rotatably arranged at equal intervals inside the U-shaped mounting plate 2. The forming mechanism 3 is arranged on the workbench 1 and is located below the U-shaped mounting plate 2. The forming mechanism 3 includes a plurality of guiding slide rails 31 arranged at equal intervals. Two L-shaped sliding strips 32 are slidably arranged in each guiding slide rail 31. One end of each L-shaped sliding strip 32 away from the guiding slide rail 31 is rotatably provided with a side pressure roller 33. Two fixing plates 34 are mirror-symmetrically arranged on each guiding slide rail 31. A horizontal roller 35 is rotatably arranged between the two fixing plates 34. An extrusion cavity 36 is formed between the horizontal roller 35, the two side pressure rollers 33, and the corresponding forming concave roller 21. A vertical plate 13 is provided at one end of the top of the workbench 1 away from the gantry 11. A vertical through groove 131 is provided at the center of the vertical plate 13. A sliding block 132 is slidably arranged in the vertical through groove 131. An installation groove 133 is provided at the center of the sliding block 132. The inner support mechanism 4 is arranged in the installation groove 133 and supports the inner wall of the pipe when the side pressure roller 33 and the horizontal roller 35 extrude the pipe. The inner support mechanism 4 includes a rectangular pipe 41 fixedly arranged in the installation groove 133. One end of the rectangular pipe 41 away from the sliding block 132 sequentially passes through a plurality of extrusion cavities 36. A plurality of rectangular sleeves 42 are arranged at equal intervals along the length direction of the rectangular pipe 41. First extension holes 421 are provided on the outer walls on both sides of each rectangular sleeve 42. A first abutting rod 43 is slidably arranged in each first extension hole 421. One end of each first abutting rod 43 away from the corresponding rectangular sleeve 42 is rotatably provided with a connecting shaft 44. The connecting shaft 44 is arranged vertically, and an inner side roller 441 is further provided at the lower end of the connecting shaft 44. A first telescopic roller 442 is further provided at the upper end of each connecting shaft 44. Extension strips 431 are provided on the outer wall of each first abutting rod 43. A second telescopic roller 432 is rotatably arranged between the two extension strips 431. The guiding mechanism 5 is arranged on the workbench 1 and is located on the side of the gantry 11 away from the vertical plate 13. The guiding mechanism 5 is used to push the to-be-processed round pipe into the extrusion cavity 36.

[0039] The to-be-processed circular tube is guided by the guiding mechanism 5 so that the to-be-processed circular tube can move into the extrusion cavity 36 formed by the horizontal roller 35, the two side pressing rollers 33 and the corresponding forming concave roller 21. The lower end plane of the side pressing roller 33 is tangent to the surface of the horizontal roller 35, thus avoiding volumetric collision between the side pressing roller 33 and the horizontal roller 35; by adjusting the two L-shaped sliding strips 32, the positions of the two side pressing rollers 33 can be adjusted, and by replacing the forming concave rollers 21 with different shapes, D-shaped heat exchange tubes of different specifications can be produced to meet the production requirements; under the push of the guiding mechanism 5, the to-be-processed circular tube contacts the horizontal roller 35, the forming concave roller 21 and the two side pressing rollers 33, thereby applying corresponding extrusion force to the outer wall of the to-be-processed circular tube. At this time, the end of the rectangular tube 41 far from the vertical plate 13 is located inside the to-be-processed circular tube, and the rectangular sleeve 42 on the rectangular tube 41 is located in the corresponding extrusion cavity 36. By adjusting the two first abutting rods 43, the inner roller 441 and the first telescopic roller 442 provided at the end of the first abutting rod 43 and the second telescopic roller 432 between the two extension strips 431 can all be attached to the inner wall of the to-be-processed circular tube during the extrusion process. The first telescopic roller 442, the second telescopic roller 432 and the inner roller 441 can form a "C-shaped shape", which can support the inner and outer walls of the to-be-processed circular tube synchronously during the forming process of the to-be-processed circular tube, ensuring the force uniformity during the forming process of the D-shaped heat exchange tube and avoiding excessive internal deformation. And through the arrangement of multiple guiding slide rails 31, the to-be-processed circular tube can be trimmed multiple times, thereby further ensuring the forming effect of the circular tube; secondly, through the arrangement of the sliding block 132, a resisting spring 1321 is arranged on the top of the sliding block 132, so that during the forming process of the circular tube, the entire rectangular tube 41 can always move towards the direction close to the workbench in the vertical direction, thereby ensuring that the first telescopic roller 442, the second telescopic roller 432 and the inner roller 441 can always abut against the inner wall of the lower end of the D-shaped heat exchange tube according to different specifications of the D-shaped heat exchange tube, so as to abut against the corresponding inner wall of the D-shaped heat exchange tube; the arrangement of the first telescopic roller 442 and the second telescopic roller 432 can be adjusted adaptively according to different D-shaped heat exchange tubes, thus avoiding volumetric collision with the D-shaped heat exchange tube and causing damage to the D-shaped heat exchange tube; after the extrusion is completed, through the cooperation of the rotation of the forming concave roller 21 and the guiding mechanism 5, the D-shaped heat exchange tube can be moved out of the gantry 11, which is convenient for subsequent operations.

[0040] See Figures 4 to 11As shown, the inner support mechanism 4 also includes a guide bar 45 and a drive motor 46; the guide bar 45 is slidably arranged inside the rectangular tube 41, and a plurality of first triangular guide plates 451 are equidistantly arranged on the outer walls on both sides of the guide bar 45 along the length direction, and the outer walls on both sides of the rectangular tube 41 along the length direction are provided with first strip-shaped avoidance grooves 411 for avoiding the first triangular guide plates 451, and each first contact rod 43 is provided with a first arc-shaped guide block 433 cooperating with the first triangular guide plate 451 at one end close to the guide bar 45, and first rectangular notches 422 for accommodating the first arc-shaped guide blocks 433 are provided on the inner walls on both sides of the rectangular sleeve 42, and the first rectangular notches 422 are aligned with the corresponding first extension holes 421 They are interconnected, and the inner walls on both sides of each rectangular sleeve 42 are also provided with a first strip-shaped through groove 423 for avoiding the first triangular guide plate 451, and the first strip-shaped through groove 423 is connected to the corresponding first rectangular notch 422; an L-shaped mounting plate 134 is provided on the sliding block 132, and the drive motor 46 is arranged on the L-shaped mounting plate 134. A plurality of tooth grooves 452 are provided along the length direction on one side of the guide strip 45 close to the drive motor 46, and a drive gear 461 is provided on the motor shaft of the drive motor 46, and the drive gear 461 is meshed with the tooth groove 452 on the guide strip 45; each first contact rod 43 is also sleeved with a first return spring 434, and the first return spring 434 is located inside the first rectangular notch 422.

[0041] When the round tube is not processed, the first triangular guide plate 451 arranged on the guide strip 45 is separated from the first arc guide block 433 by the first strip avoidance groove 411, and the first arc guide block 433 moves along the first rectangular notch 422 toward the direction close to the rectangular tube 41 under the elastic force of the first return spring 434, ensuring that the inner roller 441 and the first telescopic roller 442 arranged on the connecting shaft 44 can fit the outer wall of the rectangular sleeve 42 as closely as possible, thereby avoiding the volume collision of the inner roller 441, the first telescopic roller 442 and the second telescopic roller 432 on the movement of the round tube.

[0042] When processing the round tube, after the rectangular sleeve 42 enters the inside of the round tube, the driving motor 46 drives the driving gear 461 to rotate, and the driving gear 461 drives the guide bar 45 to move through the tooth groove 452. As the guide bar 45 moves, the first triangular guide plates 451 arranged on both sides of the guide bar 45 can contact with the corresponding first arc guide blocks 433, so that the interference rod can overcome the elastic force of the first return spring 434 and move in the direction away from the guide bar 45, so that the inner roller 441 and the first telescopic roller 442 arranged on the first interference rod 43 can interfere with the inner wall of the round tube, thereby supporting the inner wall of the pipe during the processing of the D-shaped heat exchange tube to ensure the forming effect of the D-shaped heat exchange tube.

[0043] See also Figures 4 to 11As shown, a second extension hole 424 is also provided at the center of the top of each rectangular sleeve 42, and a second resistance rod 4241 is slidably provided in each second extension hole 424, and the second resistance rod 4241 is arranged in a vertical state, and an arc-shaped support block 4242 is provided at the top of the second resistance rod 4241, and a second arc-shaped guide block 4243 is provided at the lower end of the second resistance rod 4241, and a second rectangular notch 425 for avoiding the second arc-shaped guide block 4243 is provided on the inner wall of the top of the rectangular sleeve 42, and a plurality of second triangular guide plates 453 cooperating with the second arc-shaped guide block 4243 are equidistantly provided at the top of each guide strip 45 along the length direction, and a second strip-shaped through groove 426 for avoiding the second triangular guide plate 453 is provided on the top of the rectangular tube 41; a second return spring 4244 is also sleeved on each second resistance rod 4241, and the second return spring 4244 is located in the corresponding second rectangular notch 425.

[0044] In order to ensure the molding effect of the arc-shaped inner wall of the D-shaped heat exchange tube, a second resistance rod 4241 is provided. As the guide bar 45 moves, the second triangular guide plate 453 on the guide bar 45 can contact the corresponding second arc-shaped guide block 4243 along the second strip-shaped avoidance groove 412, so that the second resistance rod 4241 can overcome the elastic force of the second return spring 4244 and move in a direction away from the guide bar 45, so that the arc-shaped support block 4242 at the end of the second resistance rod 4241 can contact the arc-shaped inner wall of the D-shaped heat exchange tube, thereby ensuring the arc of the D-shaped heat exchange tube. The molding effect of the surface is achieved, and by replacing different types of arc support blocks, the supporting area of ​​the arc support block 4242 can be increased as much as possible, so that D-shaped heat exchange tubes of different specifications can be supported; similarly, when the round tube is not processed, under the action of the elastic force of the second return spring 4244, the second resistance rod 4241 can be moved toward the direction close to the guide strip 45, so that the arc support block 4242 at the end of the second resistance rod 4241 can fit the top outer wall of the rectangular sleeve 42, thereby avoiding the arc support block 4242 from affecting the movement of the round tube.

[0045] See also Fig. 9 As shown, a bidirectional screw rod 311 is rotatably provided in each guide rail 31 , and the L-shaped slide bar 32 is threadedly connected to the end of the corresponding bidirectional screw rod 311 . An adjusting motor 312 for driving the bidirectional screw rod 311 to rotate is also provided on each guide rail 31 .

[0046] The bidirectional screw rod 311 is driven to rotate by adjusting the motor 312. As the bidirectional screw rod 311 rotates, the two L-shaped slide bars 32 located in the same guide rail 31 can move closer to or farther from each other, thereby adapting to D-shaped heat exchange tubes of different specifications to meet production needs.

[0047] See also Fig.10As shown, a conical portion 443 is further provided at one end of each first telescopic roller 442 away from the connecting shaft 44.

[0048] By providing a conical portion 443 at the end of the first telescopic roller 442, when processing the D-shaped heat exchange tube, as the round tube deforms, the first telescopic roller 442 can contact the inner wall of the round tube and generate a corresponding telescopic amount. According to the different specifications of the D-shaped heat exchange tube, the conical portion 443 provided on the first telescopic roller 442 can support the junction of the arc surface and the right-angle surface of the D-shaped heat exchange tube, and the conical portion 443 is preferably detachable, so that it can be replaced according to different arc surfaces, thereby further ensuring the forming effect of the D-shaped heat exchange tube.

[0049] See Figure 5 and Figure 8 As shown, a synchronizing mechanism 6 for driving multiple forming concave rollers 21 to rotate synchronously is further provided on the C-shaped mounting plate 2; the synchronizing mechanism 6 includes a double-shaft motor 61 and a timing belt 62; extension shafts 22 are provided at both ends of each forming concave roller 21, and the two extension shafts 22 both pass through the C-shaped mounting plate 2 and are provided with driven wheels 23. The double-shaft motor 61 is arranged at the center of the bottom of the C-shaped mounting plate 2, and driving wheels 611 are provided at both ends of the double-shaft motor 61. The driving wheels 611 are in transmission connection with the corresponding multiple driven wheels 23 through the timing belt 62.

[0050] In order to ensure the complete processing of the D-shaped heat exchange tube, by providing a double-shaft motor 61, the double-shaft motor 61 drives multiple forming concave rollers 21 to rotate synchronously through two timing belts 62, so as to continuously pull the D-shaped heat exchange tube, and the multiple forming concave rollers 21 rotate synchronously, which can ensure that the traction force received by the D-shaped heat exchange tube during movement is the same, avoiding the decline of the forming effect due to different traction forces.

[0051] See Figures 1 to 3 As shown, the guiding mechanism 5 includes a guiding frame 51 and a guiding motor 52; the guiding frame 51 is vertically arranged on the workbench 1 and is located on the side of the gantry 11 away from the vertical plate 13; a fixed concave roller 511 is rotatably arranged in the guiding frame 51, the guiding motor 52 is arranged on the outer wall of the guiding frame 51 and is used to drive the fixed concave roller 511 to rotate, and pressing-through grooves 512 are further provided on both inner walls of the guiding frame 51. A pressing block 513 is slidably arranged in each pressing-through groove 512, and a sliding concave roller 514 is rotatably arranged between the two pressing blocks 513. A pressing spring 515 is provided at the top of each pressing block 513, and the pressing spring 515 is located inside the corresponding pressing-through groove 512.

[0052] Under the elastic force of the downward pressure spring 515, the sliding concave roller 514 can contact the outer wall of the circular tube to be processed, and exert downward pressure on the circular tube to be processed, so that it can fit the fixed concave roller 511. As the guide motor 52 rotates, the fixed concave roller 511 can rotate. As the fixed concave roller 511 rotates, the circular tube to be processed can move toward the direction close to the vertical plate 13, so that it can be carried into the molding cavity and processed into a D-shaped heat exchange tube. After the processing is completed, the D-shaped heat exchange tube can be pulled, which can not only move the D-shaped heat exchange tube out of the molding cavity, but also perform secondary extrusion molding on the D-shaped heat exchange tube, thereby further improving the molding effect.

[0053] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A D-shaped heat exchange tube forming device, characterized in that: It includes a workbench, a U-shaped mounting plate, a forming mechanism, an inner support mechanism, and a guiding mechanism; A gantry is arranged on the workbench. Two hydraulic rods are vertically and mirror-image arranged at the top of the gantry. The actuating parts of the two hydraulic rods pass through the gantry and are connected to the bottom of the U-shaped mounting plate. The opening direction of the U-shaped mounting plate faces the workbench direction. A plurality of forming concave rollers are rotatably arranged at equal intervals inside the U-shaped mounting plate; The forming mechanism is arranged on the workbench and is located below the U-shaped mounting plate. The forming mechanism includes a plurality of guiding slide rails evenly distributed; two L-shaped sliding strips are slidably arranged in each guiding slide rail. One end of each L-shaped sliding strip away from the guiding slide rail is rotatably provided with a side pressing roller; two fixing plates are mirror-image arranged on each guiding slide rail, and a horizontal roller is rotatably arranged between the two fixing plates; an extrusion cavity is formed between the horizontal roller, the two side pressing rollers and the corresponding forming concave roller; A vertical plate is arranged at one end of the workbench top away from the gantry. A vertical through groove is arranged at the center of the vertical plate. A sliding block is slidably arranged in the vertical through groove. An installation groove is arranged at the center of the sliding block; the inner support mechanism is arranged in the installation groove and supports the inner wall of the pipe when the side pressing roller and the horizontal roller extrude the pipe; The inner support mechanism includes a rectangular pipe fixedly arranged in the installation groove. One end of the rectangular pipe away from the sliding block sequentially passes through a plurality of extrusion cavities. A plurality of rectangular sleeves are arranged at equal intervals along the length direction of the rectangular pipe. First extension holes are arranged on the outer walls on both sides of each rectangular sleeve. A first抵触杆 (it should be "contact rod" in English) is slidably arranged in each first extension hole. One end of each first抵触杆 (contact rod) away from the corresponding rectangular sleeve is rotatably provided with a connecting shaft. The connecting shaft is vertically arranged and an inner side roller is also arranged at the lower end of the connecting shaft. A first telescopic roller is also arranged at the upper end of each connecting shaft. Extension strips are arranged on the outer wall of each first抵触杆 (contact rod). A second telescopic roller is rotatably arranged between the two extension strips; The guiding mechanism is arranged on the workbench and is located on the side of the gantry away from the vertical plate. The guiding mechanism is used to push the to-be-processed round pipe into the extrusion cavity.

2. A D-shaped heat exchange tube forming device according to claim 1, characterized in that: The inner support mechanism further includes a guiding strip and a driving motor; The guiding strip is slidably arranged inside the rectangular pipe. A plurality of first triangular guiding plates are arranged at equal intervals on the outer walls on both sides of the guiding strip along the length direction. First strip-shaped avoidance grooves for avoiding the first triangular guiding plates are arranged on the outer walls on both sides of the rectangular pipe along the length direction. A first arc-shaped guiding block for cooperating with the first triangular guiding plate is arranged at one end of each first抵触杆 (contact rod) close to the guiding strip. First rectangular notches for accommodating the first arc-shaped guiding block are arranged on the inner walls on both sides of the rectangular sleeve. The first rectangular notches communicate with the corresponding first extension holes. First strip-shaped through grooves for avoiding the first triangular guiding plates are also arranged on the inner walls on both sides of each rectangular sleeve. The first strip-shaped through grooves communicate with the corresponding first rectangular notches; An L-shaped mounting plate is arranged on the sliding block. The driving motor is arranged on the L-shaped mounting plate. A plurality of tooth grooves are arranged along the length direction on one side of the guiding strip close to the driving motor. A driving gear is arranged on the motor shaft of the driving motor. The driving gear meshes with the tooth grooves on the guiding strip; A first return spring is also sleeved on each first抵触杆 (contact rod). The first return spring is located inside the first rectangular notch.

3. A D-shaped heat exchange tube forming device according to claim 2, characterized in that: A second extension hole is also provided at the center of the top of each rectangular sleeve. A second抵触 rod is slidably arranged in each second extension hole. The second抵触 rod is arranged in a vertical state. An arc-shaped support block is arranged at the top end of the second抵触 rod, and a second arc-shaped guiding block is arranged at the lower end of the second抵触 rod. A second rectangular notch for avoiding the second arc-shaped guiding block is arranged on the inner wall of the top of the rectangular sleeve. A plurality of second triangular guiding plates cooperating with the second arc-shaped guiding block are equidistantly arranged along the length direction at the top of each guiding strip. A second strip-shaped through groove for avoiding the second triangular guiding plate is arranged at the top of the rectangular pipe; A second return spring is also sleeved on each second抵触 rod, and the second return spring is located in the corresponding second rectangular notch.

4. The D-shaped heat exchange tube forming device according to claim 1, characterized in that: A bidirectional lead screw is rotatably arranged in each guiding slide rail. The L-shaped slide bar is threadedly connected to the end of the corresponding bidirectional lead screw. An adjusting motor for driving the bidirectional lead screw to rotate is also arranged on each guiding slide rail.

5. The D-shaped heat exchange tube forming device according to claim 3, characterized in that: A conical portion is also arranged at one end of each first telescopic roller away from the connecting shaft.

6. The D-shaped heat exchange tube forming device according to claim 1, characterized in that: A synchronous mechanism for driving a plurality of forming concave rollers to rotate synchronously is also arranged on the C-shaped mounting plate.

7. A D-shaped heat exchange tube forming device according to claim 6, characterized in that: The synchronous mechanism includes a double-shaft motor and a synchronous belt; Extension shafts are arranged at both ends of each forming concave roller. Both extension shafts pass through the C-shaped mounting plate and are provided with driven wheels. The double-shaft motor is arranged at the center of the bottom of the C-shaped mounting plate. Driving wheels are arranged at both ends of the double-shaft motor. The driving wheels are传动连接 to the corresponding plurality of driven wheels through a synchronous belt.

8. The D-shaped heat exchange tube forming device according to claim 1, characterized in that: The guiding mechanism includes a guiding frame and a guiding motor; The guiding frame is arranged vertically on the workbench and is located on the side of the gantry away from the vertical plate; A fixed concave roller is rotatably arranged in the guiding frame. The guiding motor is arranged on the outer wall of the guiding frame and is used to drive the fixed concave roller to rotate. Pressing through grooves are also arranged on both inner walls of the guiding frame. A pressing block is slidably arranged in each pressing through groove. A sliding concave roller is rotatably arranged between the two pressing blocks. A pressing spring is arranged at the top of each pressing block, and the pressing spring is located inside the corresponding pressing through groove.

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