A small spiral plate heat exchanger roll welding integrated equipment

Abstract

This invention discloses a small spiral plate heat exchanger integrated rolling and welding equipment, including a rolling mechanism, a pressure roller, and a welding mechanism. The rolling mechanism can roll the plate material into a predetermined shape. During the rolling process, the welding mechanism can simultaneously weld the plate material, achieving automatic welding, improving production efficiency, and simplifying operation for user convenience. This invention solves the problem of separate rolling and welding steps in existing small spiral plate heat exchangers. During the actual welding process of the spiral plate, the weld seam increases in a spiral shape. When the plate material is clamped on the roller, the lifting mechanism simultaneously drives the pressure roller to rise and fall as the roller rotates, adapting to the rotation speed of the roller and the lifting speed of the pressure roller. This ensures that the welding mechanism achieves a constant welding speed, matching the weld seam trajectory of the welding mechanism with the spiral seam trajectory of the spiral channel. This solves the problem of unsatisfactory weld seam trajectories caused by the reduction in the thickness of the small spiral plate and the spacing of the spiral channel.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to a small spiral plate heat exchanger integrated welding and rolling equipment. Background Technology

[0002] Currently, most spiral plate heat exchangers are manufactured and welded in two separate parts. One method involves rolling first and then welding, which increases the misalignment at the joints, resulting in a very small space for the small spiral plate heat exchanger and failing to meet product requirements. The other method involves welding first and then rolling, which leads to lower efficiency. Rolling the spiral plate heat exchanger takes time; after rolling, the flatness of the spiral seam is adjusted, and spot welding is performed for fixation, followed by alternating segmented welding of the spiral seam. However, in the latter case, due to the reduced thickness of the spiral plate and the spacing between the spiral channels in small spiral plate heat exchangers, the thin plate rolling process is unstable, and this welding method easily leads to unsatisfactory weld seam trajectories. In other words, existing manufacturing equipment that separates rolling and welding in small spiral plate heat exchangers results in misalignment at the spiral plate joints and unsatisfactory weld seam trajectories. Therefore, there is an urgent need to research and develop a manufacturing equipment for small spiral plate heat exchangers that can simultaneously roll and weld to solve these problems. Summary of the Invention

[0003] The purpose of this invention is to provide a small spiral plate heat exchanger rolling and welding integrated equipment to solve the problem of separation of rolling and welding in existing small spiral plate heat exchanger manufacturing equipment.

[0004] To address the aforementioned technical problems, this invention provides a small spiral plate heat exchanger integrated rolling and welding device, comprising a rolling mechanism, a pressure roller, a lifting mechanism, and a welding mechanism. The rolling mechanism has a roller shaft, the axis of which and the axis of the pressure roller are both perpendicular to the same vertical line, and the axial direction of the roller shaft is the same as that of the pressure roller. The peripheral walls of the pressure roller and the roller shaft are used together to extrude the added plate material to form a spiral channel. The pressure roller is fixedly connected to the lifting part of the lifting mechanism. When the roller shaft rotates, the lifting mechanism drives the pressure roller to maintain contact with the plate material. The welding mechanism is fixedly connected to the lifting part of the lifting mechanism, and the welding part of the welding mechanism is aligned with the end of the spiral channel. When the roller shaft rotates, the lifting mechanism drives the pressure roller and the welding mechanism to rise and fall, so that the weld seam trajectory of the welding mechanism matches the spiral seam trajectory of the spiral channel. The spiral channel, with its increasing spiral size, achieves high precision and good adjustability by cooperating with the lifting mechanism and the roller shaft, ensuring that the weld seam trajectory and the ideal spiral seam trajectory are within allowable deviations.

[0005] In one embodiment, the rotation of the roll is a uniformly decelerated rotation, and the lifting and lowering of the pressure roller is a uniformly decelerated lifting and lowering. The uniformly decelerated rotation of the roll combined with the uniformly decelerated lifting and lowering of the pressure roller can ensure that the weld seam trajectory and the ideal spiral seam trajectory are within the allowable deviation while maintaining a constant welding speed.

[0006] In one embodiment, the uniformly decelerated rotation of the reel satisfies the following formula:

[0007]

[0008] Where, N i Let V be the spool rotation speed (r / s) corresponding to the radius of the i-th sheet metal, and R be the welding speed. i Let be the radius of the i-th arc of the sheet metal, ΔR be the increment of the arc radius of the sheet metal, H be the spacing between adjacent spiral welds, and m be the fraction of the circumference of the sheet metal.

[0009] In one embodiment, the uniformly decelerated descent of the pressure roller satisfies the following formula:

[0010] v j =v j-1 -0.03

[0011] Among them, v j The lifting speed of the lifting pressure roller.

[0012] In one embodiment, the spool extends with an arc-shaped convex wall facing the spool, and a clamping groove is provided between the arc-shaped convex wall and the spool. The clamping groove is arranged along the axial direction of the spool, and both ends of the clamping groove are open. The structure of the arc-shaped convex wall can improve its structural strength, so that the clamping groove can better clamp the sheet material.

[0013] In one embodiment, the winding mechanism includes a moving component, a fixed platform, a first motor, and a second motor; the winding shaft includes two shafts arranged opposite each other, each shaft having a retaining groove, and the two shafts are respectively connected to the first motor and the second motor; the first motor is fixedly connected to the fixed platform; the second motor is fixedly connected to the moving end of the moving component, the moving component is fixedly connected to the fixed platform, the moving direction of the moving component is the same as the axial direction of the adjacent shafts, the moving component is used to make the two shafts adjacent or separate, and has a moving second motor, so that the shafts can be adjacent or separate, so as to disassemble the sheet metal on the shafts.

[0014] In one embodiment, the welding mechanism includes a welding fixture and a welding component; the welding fixture is fixedly connected to the lifting end of the lifting mechanism, and the welding fixture and the welding component are rotatably connected in a manner that allows for adjustable welding position angles, thus providing an angle-adjustable welding method. When facing a sheet of any length, the welding component can be aligned with the spiral channel formed by the sheet to achieve the purpose of welding the end of the spiral channel.

[0015] In one embodiment, a limiting and pressing mechanism is further included; the limiting and pressing mechanism includes a limiting connecting frame, multiple horizontal pressing rollers, and multiple vertical movable pressing rollers; the limiting connecting frame is fixedly connected to the lifting part of the lifting mechanism, the limiting connecting frame is fixedly connected to multiple horizontal pressing rollers, and the limiting connecting frame is fixedly connected to multiple vertical movable pressing rollers; the multiple horizontal pressing rollers are arranged opposite to each other, and a storage space is left between the multiple horizontal pressing rollers, the storage space is used to accommodate the sheet material so that one end of the sheet material is aligned with the through space, the multiple horizontal pressing rollers are used to limit the vertical offset of the sheet material; the multiple vertical movable pressing rollers are arranged on both sides of the storage space, the multiple vertical movable pressing rollers are arranged opposite to each other, the multiple vertical movable pressing rollers are used to limit the lateral offset of the sheet material, and the limiting and pressing mechanism with limiting the vertical and lateral offset of the sheet material can effectively control the amount of edge misalignment of the sheet material during the rolling process.

[0016] In one embodiment, the lifting mechanism includes a lifting support frame, a sliding guide block, a guide rail, a lead screw, a lifting motor, and a transmission belt; the pressure roller and the welding mechanism are both fixed on the lifting support frame, the end of the lifting support frame is fixedly connected to the sliding guide block, the sliding guide block is slidably mounted on the guide rail, and the guide rail is arranged vertically; the lead screw is rotatably connected to the lifting support frame, and the lead screw is driven by the lifting motor through the transmission belt. Through the transmission control of the lead screw, the lifting speed of the pressure roller can be precisely controlled.

[0017] The beneficial effects of this invention are as follows:

[0018] I. Because this solution includes a rolling mechanism, pressure rollers, and a welding mechanism, the rolling mechanism can roll the sheet material into a predetermined shape. During the rolling process, the welding mechanism can simultaneously weld the sheet material, achieving automatic welding, which improves production efficiency, is simple to operate, and is convenient for users. This solves the problem of the separation of rolling and welding steps in existing small spiral plate heat exchangers.

[0019] Second, in the actual welding process of the spiral plate, the weld seam increases in a spiral shape. In this solution, when the plate is clamped on the roller, when the roller rotates, the lifting mechanism will simultaneously drive the pressure roller to rise and fall to match the rotation speed of the roller and the lifting speed of the pressure roller. This allows the welding mechanism to achieve a match between the weld seam trajectory of the welding mechanism and the spiral seam trajectory of the spiral channel under a constant welding speed, thus solving the problem of unsatisfactory weld seam trajectory caused by the reduction in the thickness of the small spiral plate and the spacing of the spiral channel.

[0020] In summary, this solution achieves integrated rolling and welding of small spiral plate heat exchangers by coupling the rolling mechanism, pressure roller, lifting mechanism, and welding mechanism, and also solves the welding problems that occur in the existing technology of small spiral plate heat exchangers. Attached Figure Description

[0021] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure provided by a preferred embodiment of the present invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the overall structure provided by a preferred embodiment of the present invention. Figure 2 ;

[0024] Figure 3 This is a schematic diagram of the winding mechanism structure provided by a preferred embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the scroll structure provided by a preferred embodiment of the present invention;

[0026] Figure 5 This is a cross-sectional schematic diagram of the scroll structure provided in a preferred embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the overall structure provided by the preferred embodiment of the present invention after removing the scroll structure. Figure 1 ;

[0028] Figure 7 This is a schematic diagram of the overall structure provided by the preferred embodiment of the present invention after removing the scroll structure. Figure 2 ;

[0029] Figure 8 This is a schematic diagram of the limiting and pressing mechanism structure provided in a preferred embodiment of the present invention. Figure 1 ;

[0030] Figure 9 This is a schematic diagram of the limiting and pressing mechanism structure provided in a preferred embodiment of the present invention. Figure 2 ;

[0031] Figure 10 This is a schematic diagram of the pressure roller structure provided by a preferred embodiment of the present invention;

[0032] Figure 11 A schematic diagram of the welding mechanism structure provided in a preferred embodiment of the present invention;

[0033] Figure 12 Schematic diagram of the lifting mechanism (with part of the housing removed) provided by the preferred embodiment of the invention Figure 1 ;

[0034] Figure 13 Schematic diagram of the lifting mechanism (with part of the housing removed) provided by the preferred embodiment of the invention Figure 2 ;

[0035] Figure 14 A schematic diagram of the sheet metal rolling principle provided by a preferred embodiment of the invention.

[0036] The attached figures are labeled as follows:

[0037] 1. Rolling mechanism; 10. Roller; 100. Pallet slot; 101. Arc-shaped convex wall; 11. Moving part; 12. Fixed platform; 13. First motor; 14. Second motor;

[0038] 2. Pressure roller;

[0039] 3. Lifting mechanism; 30. Lifting support frame; 31. Sliding guide block; 32. Guide rail; 33. Lead screw; 34. Lifting motor; 35. Transmission belt;

[0040] 4. Welding mechanism; 40. Welding fixture; 41. Welding components;

[0041] 5. Limiting and clamping mechanism; 50. Limiting connecting frame; 51. Horizontal clamping roller; 52. Vertical movable clamping roller;

[0042] 6. Spiral channel;

[0043] 7. Sheet metal. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0045] Several problems exist with existing equipment for manufacturing small spiral plates. First, existing equipment often separates the rolling and welding of the spiral plate, which is time-consuming and laborious, and also increases the misalignment at the joints of the small spiral plates. Second, since existing equipment is typically used for large spiral plate heat exchangers, when applied to small spiral plate heat exchangers, the reduced thickness of the spiral plate and the spacing between the spiral channels make the thin plate rolling process unstable. Using the traditional method of rolling the spiral plate before welding the spiral seam in small spiral plate heat exchangers easily results in unsatisfactory welds. Third, the spiral seam of existing small spiral plate heat exchangers tends to increase in size during actual welding, leading to inconsistent welding speeds. Fourth, existing small spiral plate heat exchangers lack adjustability and cannot meet the needs of small spiral plate heat exchangers with different diameters. Fifth, it is difficult to control the amount of misalignment during the rolling process with existing small spiral plate heat exchangers.

[0046] To solve the above problems, please refer to Figures 1 to 14 This invention provides a small spiral plate heat exchanger roll-welding integrated equipment, including a rolling mechanism 1, a pressure roller 2, a lifting mechanism 3, a welding mechanism 4, and a limiting and pressing mechanism 5. Its core is to use the rolling mechanism 1 to roll the plate material 7, and to control the positional relationship between the pressure roller 2 and the welding mechanism 4 and the plate material 7 through the lifting mechanism 3, so as to achieve the purpose of roll-welding integration and matching the weld seam trajectory with the spiral seam trajectory when the welding speed is constant. Specifically, the preferred embodiment will be described below.

[0047] Example 1

[0048] Please refer to Figure 3 and Figure 4 Regarding the aforementioned winding mechanism 1, the winding mechanism 1 includes a servo motor, a winding shaft 10, and a fixed platform 12. The servo motor is fixedly connected to the fixed platform 12, and the servo motor is driven by the winding shaft 10. The winding shaft 10 is arranged horizontally. With this arrangement, the plate to be wound is clamped onto the winding shaft 10, and the winding shaft 10 rotates under the drive of the servo motor. Because the limiting and pressing mechanism 5 maintains the pressing and limiting of the plate, the plate will abut against and press against the winding shaft 10 when rotating, and the plate will form a spiral channel 6 under the squeezing action of the winding shaft 10 and the pressure roller 2 to generate a spiral plate, i.e. Figure 14 As shown.

[0049] It should be pointed out that, such as Figure 14 The spiral channel 6 refers to the gap formed between the sheet 7 after it is bent once and the previous one during the bending process. The entire gap is spiral-shaped and is open at both ends. Therefore, it is called the spiral channel 6.

[0050] In some embodiments of this application, for the reel 10, such as Figure 4 and Figure 5 As shown, an arc-shaped protrusion 101 extends from the spool 10, with the arc-shaped protrusion 101 facing the spool 10. A retaining groove 100 is left between the arc-shaped protrusion 101 and the spool 10. The retaining groove 100 is arranged along the axial direction of the spool 10, and both ends of the retaining groove 100 are open. With this arrangement, the arc-shaped protrusion 101 increases the retaining thickness of the spool 10, so that the retaining groove 100 can provide stronger support to the plate when clamping the plate, preventing damage to the retaining groove 100 when clamping the plate.

[0051] It should be noted that the gap between the slots of the card slot 100 is at least 1.8 mm, and the radius of the inner bottom ball of the card slot 100 is also at least 1.8 mm.

[0052] In some embodiments of this application, such as Figure 3 As shown, the reel 10 consists of two separate shafts, each equipped with a servo motor: a first motor 13 and a second motor 14. Both motors 13 and 14 are connected to the control device via signals. Each shaft has a slot 100 as described above. The two shafts are respectively connected to the first motor 13 and the second motor 14. The first motor 13 is fixedly connected to the fixed platform 12, and the second motor 14 is fixedly connected to the moving end of the moving component 11. The moving component 11 is also fixedly connected to the fixed platform 12. The moving direction of the moving component 11 is the same as the axial direction of the shaft. With this configuration, at the start or end of welding, the cylinder drags the second motor 14 to the left (e.g., ...). Figure 3 As shown, the plate can be moved and can be locked in / unlocked in the slot 100 on the other end of the roller 10, that is, axial loading and unloading. Then the second motor 14 is moved to the right to realize the loading and unloading of the plate 7 at the end face of the roller 10. It is easy to use and highly efficient.

[0053] Among them, such as Figure 3 As shown, the moving part 11 includes a cylinder, a cylinder push rod, a cylinder guide rail 32, and a cylinder slider. The cylinder push rod is located inside the cylinder and is fixedly connected to the cylinder slider. The cylinder slider is slidably mounted on the cylinder guide rail 32. The arrangement direction of the cylinder guide rail 32 is the same as the direction of the shaft. The cylinder slider is fixedly connected to the second motor 14, thereby realizing the linear motion of the motor.

[0054] It should be noted that the moving part 11 in this solution preferably adopts the cylinder linear guide 32 mechanism, but other mechanisms that can achieve linear motion can also be selected, such as gear and rack mechanism, lead screw 33 transmission mechanism and electric push rod mechanism, etc. Those skilled in the art can make selections according to their own actual situation.

[0055] In some possible embodiments of this application, the spool 10 is a single shaft, and the number of servo motors is also only one. With this configuration, the spool 10 needs to be removed from the servo motor each time the plate is loaded or unloaded. Those skilled in the art can choose according to their actual needs.

[0056] Please refer to Figure 1 , Figure 6 and Figure 10 Regarding the aforementioned pressure roller 2, the pressure roller 2 is located directly below the roll 10. The axis of the pressure roller 2 and the axis of the roll 10 are both perpendicular to the same vertical line. The axial direction of the roll 10 is the same as the axial direction of the pressure roller 2, that is, on the same vertical plane. The pressure roller 2 and the roll 10 are arranged in parallel, and the peripheral wall of the pressure roller 2 and the peripheral wall of the roll 10 together squeeze the clamped sheet 7 to form a spiral channel 6.

[0057] And, as Figure 10 As shown, the pressure roller 2 and the liftable part of the lifting mechanism 3 are fixedly connected by a frame. The frame raises the pressure roller 2 so that there is enough space between the pressure roller 2 and the liftable part of the lifting mechanism 3 for the plate to pass through. With this setting, the pressure roller 2 can maintain contact with the plate 7 under the drive of the lifting mechanism 3, thereby controlling the formation of the spiral channel 6.

[0058] Please refer to Figure 6 , Figure 7 and Figure 11 Regarding the aforementioned welding mechanism 4, there are two welding mechanisms 4. The welding components 41 of the two welding mechanisms 4 are respectively aligned with the two ends of the spiral channel 6. The welding mechanism 4 includes a welding fixing frame 40 and welding components 41. The welding fixing frame 40 is fixedly connected to the lifting end of the lifting mechanism 3. The welding component 41 can be raised and lowered with the pressure roller 2, so that when the welding speed of the welding component 41 is constant, the weld seam trajectory of the welding mechanism 4 can be matched with the spiral seam trajectory of the spiral channel 6 through the specific cooperation of the roller 10 and the pressure roller 2.

[0059] Furthermore, the welding fixture 40 and the welding component 41 are rotatably connected in a manner that allows for adjustable welding position angles. With this configuration, when the width of the sheet 7 changes or the diameter of the sheet 7 changes, the angle-adjustable welding component 41 can adapt to different situations of more spiral plates (sheet 7).

[0060] Specifically, such as Figure 4As shown, the welding component 41 is provided with a rotating hole and a sliding groove, and the welding fixing frame 40 is provided with a first fixing hole and a second fixing hole. The rotating hole is connected to the first fixing hole by a screw and nut, so that the welding component 41 can rotate at any angle. The sliding groove is connected to the second fixing hole by a screw and nut, so that the welding component 41 can slide only in the groove direction of the sliding groove, so that the entire welding component 41 can weld the end of the spiral plate 7 at any angle.

[0061] The welding component 41 can be made of laser welding, MIG welding, or ultrasonic welding, and those skilled in the art can choose according to their own actual situation.

[0062] Please refer to Figure 11 and Figure 12 As shown, the lifting mechanism 3 includes a lifting support frame 30, sliding guide blocks 31, guide rails 32, lead screws 33, a lifting motor 34, and a transmission belt 35. The pressure roller 2 and the welding mechanism 4 are both fixed on the lifting support frame 30. Sliding guide blocks 31 are fixedly connected to both ends of the lifting support frame 30. The two sliding guide blocks 31 are slidably installed on the two guide rails 32, which are arranged vertically. The two lead screws 33 are rotatably connected to the lifting support frame 30. A transmission belt is connected between the two lead screws 33. One of the lead screws 33 is also connected to the output end of the lifting motor 34 via the transmission belt. The lifting motor 34 is signal-connected to the control device. With this configuration, the lifting support frame 30 can drive the pressure roller 2 and the welding mechanism 4 to move up and down. When the roller 10 rotates, the lifting support frame 30 drives the pressure roller 2 and the welding mechanism 4 to rise and fall, so that the weld seam trajectory of the welding mechanism 4 matches the spiral seam trajectory of the spiral channel 6.

[0063] It should be noted that the lifting motor 34 is preferably a servo motor.

[0064] Please refer to Figures 6 to 9Regarding the aforementioned limiting and pressing mechanism 5, the limiting and pressing mechanism 5 is fixedly connected to the lifting support frame 30 of the lifting mechanism 3. The limiting and pressing mechanism 5 includes multiple horizontal pressing rollers 51 and multiple vertical movable pressing rollers 52. The multiple horizontal pressing rollers 51 are arranged opposite each other, and a storage space is left between the multiple horizontal pressing rollers 51. The storage space is used to accommodate the plate material 7 so that one end of the plate material 7 is aligned with the plate space. The multiple horizontal pressing rollers 51 are used to limit the vertical offset of the plate material 7. The multiple vertical movable pressing rollers 52 are arranged on both sides of the storage space, and the multiple vertical movable pressing rollers 52 are arranged opposite each other. The multiple vertical movable pressing rollers 52 are used to limit the horizontal offset of the plate material 7. After adopting this setting method, by limiting the vertical and horizontal offset of the plate material 7, the misalignment of the two rolled plates can be guaranteed to be within a certain error range when the spiral plate plate 7 is rolled. This avoids the situation in the traditional method of rolling first and then welding, without clamps to fix it, which causes the spiral plate heat exchanger to have a certain degree of springback due to the toughness of the material, which will have a certain impact on the welding process.

[0065] In some embodiments of this application, such as Figures 6 to 9 As shown, the limiting and pressing mechanism 5 also includes a limiting connecting frame 50, which is fixedly connected to the lifting part of the lifting mechanism 3. The limiting connecting frame 50 is fixedly connected to multiple horizontal pressing rollers 51 and multiple vertical movable pressing rollers 52. With this setting, the entire limiting and pressing system is installed on the lifting system and moves with the lifting system. It can follow the lifting system of the pressure roller 2 to control different error variables during the rolling process.

[0066] As can be seen from the above, the basic structure and principle of this solution are as follows. In the embodiments of this application, when the welding speed of the welding mechanism 4 is kept constant, the speed of the roller 10 and the lifting speed of the pressure roller 2 will directly affect the degree of matching between the weld seam trajectory of the welding mechanism 4 and the spiral seam trajectory of the spiral channel 6, thereby affecting the welding speed. In order to ensure that the welding speed is constant, and to achieve the matching between the weld seam trajectory of the welding mechanism 4 and the spiral seam trajectory of the spiral channel 6, the rotation of the roller 10 needs to be a uniformly decelerated rotation, and the lifting and lowering of the pressure roller 2 needs to be a uniformly decelerated descent.

[0067] The uniformly decelerated rotation of the scroll 10 needs to satisfy the following formula:

[0068]

[0069] Where, N i Let V be the rotational speed (r / s) of the spool 10 corresponding to the curvature of the i-th sheet 7, and R be the welding speed. i Let be the radius of the i-th plate 7 arc, ΔR be the increment of the arc radius passing through one plate 7, H be the spacing between adjacent spiral welds, and m be the equal fraction of the circumference arc of plate 7.

[0070] It should be noted that in this formula, the curvature of sheet metal 7 refers to the instantaneous radius of the outermost layer of sheet metal 7 relative to the center of the roll 10, with the line connecting the center of the roll 10 to the end of the arc-shaped convex wall 101 as the specified direction. This is the curvature of sheet metal 7, as can be seen in the following figure. Figure 14 The dotted line in the figure represents the curvature of sheet 7.

[0071] The uniform deceleration descent of pressure roller 2 satisfies the following formula:

[0072] v j =v j-1 -0.03#

[02]

[0073] Among them, v j v is the lifting speed of the lifting pressure roller at this moment. j-1 This represents the lifting speed of the lifting pressure roller at the previous moment.

[0074] In a specific embodiment of this application, during the actual welding process, the weld increases in a spiral shape. In order to ensure that the welding speed is constant, the speed of the roller 10 needs to be adjusted so that it rotates at a uniform deceleration. At the same time, the pressure roller 2 needs to descend at a uniform deceleration.

[0075] Because the rotational speed of the roll 10 is as low as 0.422 r / s and the rotational speed of the lifting motor 34 is as low as 0.18 r / s during the rolling process, and the motor is also under a large load, it is easy to stall when the motor is uniformly decelerated under low speed and high load. Therefore, this paper divides the rotational speed of the roll 10 into multiple arcs for uniform speed control and the lifting pressure roller 2 into multiple segments for uniform speed control, so that the weld seam trajectory and the ideal spiral seam trajectory are within the allowable deviation.

[0076] It should be noted that the spiral of the spiral plate is neither circular nor elliptical, but rather an arc with a continuously increasing radius. Therefore, it is necessary to control the curvature of multiple segments.

[0077] Specifically, the speed regulation frequency of the roller 10 is set to 20 times per revolution, the spacing between adjacent spiral seams is 4.4 mm, the initial radius is 20 mm, the welding speed is 5.3 mm / s, and the speed regulation model of the roller 10 is as shown in the above formula.

[0078] As the lifting pressure roller 2 rolls around the winding shaft 10, its speed decreases by 0.03 mm / s. The initial speed is 0.18558 mm / s. The speed of the lifting pressure roller 2 is calculated using the formula above.

[0079] The rotation time of scroll 10 is:

[0080]

[0081] In the formula, t i The time elapsed for the i-th radian scroll 10 to rotate

[0082] From equations

[01] ,

[02] , and

[03] , the deviation in the width direction between the tungsten electrode and the weld center can be obtained as follows:

[0083]

[0084] Because the speed adjustment range of the lifting pressure roller 2 is large, the more turns the roller 10 makes, the greater the deviation between the tungsten electrode of the welding gun and the center of the weld. The deviation obtained from the deviation test between the tungsten electrode and the center of the weld is ±1mm. By adjusting the speed of the roller 10 and the lifting pressure roller 2, the deviation between the tungsten electrode and the center of the weld is kept within the allowable range and meets the requirements.

[0085] Example 2

[0086] The second embodiment of this application is largely the same as the first embodiment, except that the pressure roller 2 is not located directly below the roller, but directly above the roller, and the pressure roller 2 does not descend at a constant speed as in the first embodiment, but rises at a constant speed when the roller 10 rotates at a constant deceleration.

[0087] Specifically, the pressure roller 2 is elevated directly above the roller by the frame, and there is enough space between the roller 10 and the liftable part of the lifting mechanism 3 for the plate to pass through, so as to meet the cooperation between the pressure roller 2 and the roller.

[0088] As can be seen above, the core of the first and second embodiments of this application is that, while maintaining a constant welding speed of the welding mechanism 4, the welding seam trajectory of the welding mechanism 4 is matched with the spiral seam trajectory of the spiral channel 6 through the cooperation of the roller 10 and the pressure roller 2. As for whether the pressure roller 2 rises or falls, those skilled in the art can choose according to their actual application scenario to meet their own needs.

[0089] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A small spiral plate heat exchanger integrated welding and rolling equipment, characterized in that, Includes a rolling mechanism, pressure rollers, lifting mechanism, and welding mechanism; The winding mechanism is provided with a winding shaft, the axis of which and the axis of the pressure roller are both perpendicular to the same vertical line, and the direction of the axis of the winding shaft is the same as the direction of the axis of the pressure roller. The peripheral walls of the pressure roller and the peripheral walls of the roll are used together to extrude the added sheet material to form a spiral channel; The pressure roller is fixedly connected to the lifting part of the lifting mechanism. When the roller rotates, the lifting mechanism is used to drive the pressure roller to keep it in contact with the sheet material. The welding mechanism is fixedly connected to the lifting part of the lifting mechanism. The welding part of the welding mechanism is aligned with the end of the spiral channel. When the roller rotates, the lifting mechanism is used to drive the pressure roller and the welding mechanism to rise and fall, so that the weld seam trajectory of the welding mechanism matches the spiral seam trajectory of the spiral channel. The rotation of the roll is a uniformly decelerated rotation, and the lifting and lowering of the pressure roller is a uniformly decelerated lifting and lowering; The uniformly decelerated rotation of the reel satisfies the following formula: in, The reel speed (r / s) corresponding to the curvature of the i-th sheet material. For welding speed, Let the radius of curvature of the i-th sheet material be... For an increment of the radius of curvature of the sheet metal, The spacing between adjacent spiral welds, The number of equal parts of the circumference arc of the sheet metal; The uniform deceleration and lifting of the pressure roller satisfies the following formula: in, The lifting speed of the lifting pressure roller at this moment. This represents the lifting speed of the lifting pressure roller at the previous moment.

2. The integrated spiral plate heat exchanger welding and coiling equipment according to claim 1, characterized in that, The spool extends with an arc-shaped convex wall facing the spool. A retaining groove is provided between the arc-shaped convex wall and the spool. The retaining groove is arranged along the axial direction of the spool, and both ends of the retaining groove are open.

3. The integrated spiral plate heat exchanger welding and coiling equipment according to claim 1, characterized in that, The winding mechanism includes a moving component, a fixed platform, a first motor, and a second motor; The reel includes two shafts arranged opposite each other, each shaft having a retaining plate groove, and the two shafts are respectively connected to the first motor and the second motor for transmission. The first motor is fixedly connected to the fixed platform; The second motor is fixedly connected to the moving end of the moving component, the moving component is fixedly connected to the fixed platform, the moving direction of the moving component is the same as the axial direction of the adjacent shaft, and the moving component is used to make the two shafts adjacent or separate.

4. The integrated spiral plate heat exchanger welding and coiling equipment according to claim 1, characterized in that, The welding mechanism includes a welding fixture and welding components; The welding fixing frame is fixedly connected to the lifting end of the lifting mechanism, and the welding fixing frame is rotatably connected to the welding component in a manner that allows for adjustable welding position angle.

5. The integrated spiral plate heat exchanger welding and coiling equipment according to claim 1, characterized in that, It also includes a limit clamping mechanism; The limiting and pressing mechanism includes a limiting connecting frame, multiple horizontal pressing rollers, and multiple vertical movable pressing rollers; The limiting connecting frame is fixedly connected to the lifting part of the lifting mechanism, the limiting connecting frame is fixedly connected to multiple horizontal pressing wheels, and the limiting connecting frame is fixedly connected to multiple vertical movable pressing wheels. Multiple transverse clamping rollers are arranged opposite to each other, and a storage space is left between the multiple transverse clamping rollers. The storage space is used to accommodate the sheet material so that one end of the sheet material is aligned with the storage space. The multiple transverse clamping rollers are used to limit the vertical displacement of the sheet material. Multiple vertical movable pressure rollers are arranged on both sides of the storage space, and the multiple vertical movable pressure rollers are arranged opposite to each other. The multiple vertical movable pressure rollers are used to limit the lateral displacement of the plate material.

6. The integrated spiral plate heat exchanger welding and coiling equipment according to claim 1, characterized in that, The lifting mechanism includes a lifting support frame, a sliding guide block, a guide rail, a lead screw, a lifting motor, and a transmission belt; Both the pressure roller and the welding mechanism are fixed on the lifting support frame. The end of the lifting support frame is fixedly connected to the sliding guide block. The sliding guide block is slidably installed on the guide rail, and the guide rail is arranged vertically. The lead screw is rotatably connected to the lifting support frame, and the lead screw is connected to the lifting motor via the transmission belt.

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