Spiral baffle tube hole processing device and processing method

Abstract

The present application relates to helical baffle processing technical field, especially a kind of helical baffle tube hole processing device and processing method.It includes control system, helical baffle, opening device, helical baffle support positioning device, control system is electrically connected with opening device;Helical baffle is sleeved on helical baffle support positioning device.The present application improves the tube hole processing precision, reduces production cost, improves production efficiency, realizes the continuity of helical baffle tube hole processing.

Description

Technical Field

[0001] This invention relates to the field of spiral baffle processing technology, and in particular to a spiral baffle tube hole processing device and processing method. Background Technology

[0002] Baffles are crucial components for improving heat exchanger efficiency. In traditional bow-shaped baffle heat exchangers, the shell-side liquid flows along a zigzag path, resulting in an uneven flow field. In contrast, spiral baffle heat exchangers allow for continuous fluid flow without alternating backflow, reducing shell-side resistance by 20%-50%. Overall, compared to traditional bow-shaped baffle heat exchangers, spiral baffle heat exchangers offer advantages such as higher heat transfer efficiency, fewer dead zones, and more uniform temperature distribution. They also provide benefits such as continuous spiral liquid flow, lower shell-side resistance, reduced induced vibration, lower scaling rates, and longer cleaning cycles.

[0003] Spiral baffle heat exchangers are divided into two types: discontinuous spiral and continuous spiral. The mainstream type currently used in the Chinese market is the discontinuous spiral baffle. Discontinuous spiral baffles use several quarter-fan-shaped flat plates to replace curved surfaces, connected alternately to form a discontinuous spiral plane. However, in this structural design, due to the short-circuiting and leakage of the medium during flow, although the shell-side fluid is in an approximately spiral flow state, it cannot achieve ideal heat transfer performance. In continuous spiral baffle heat exchangers, the baffles are continuous spiral curved surfaces, which can be achieved by combining multiple single spirals. The molding process for single spirals is currently very mature. However, machining coaxial heat exchange tube holes on these spiral curved surfaces is quite difficult, which is why continuous spiral baffle heat exchangers have not been widely adopted.

[0004] Chinese Patent (CN111571157A) discloses a method for processing the tube holes of a spiral baffle plate in a shell-and-tube heat exchanger: The spiral baffle plate to be perforated is fixed on a spiral baffle plate support and positioning device, ensuring that the rotation axes of both the perforation device and the spiral baffle plate are perpendicular to the reference plane of the perforation positioning device. The perforation positioning device is moved by a control system, determining spatial coordinate points during the movement. When a point matches a preset value, the perforation device is activated to perform the perforation. The perforation positioning device fine-tunes its position to complete the perforation operation, and then stops. After perforation is completed, the control system moves the perforation positioning device again to the next spatial coordinate point matching the preset value for perforation. This process is repeated periodically until all perforations are completed. When the rotation angle of the spiral baffle exceeds 180 degrees, the drilling device is prone to interference with the spiral baffle during operation. Drilling can be performed in two stages: first, process the pipe holes within half the rotation angle range on the spiral surface of the baffle; then, flip the spiral baffle, ensuring that the rotation axis of the flipped baffle coincides with that of the original baffle; finally, process the remaining pipe holes on the spiral surface of the baffle. The drilling device can be selected from laser cutting, drilling, ion cutting, high-pressure water jet cutting, wire cutting, etc., as needed. Continuous spiral baffles with a rotation angle exceeding 360 degrees should be decomposed into multiple spiral baffles with rotation angles not exceeding 360 degrees for further processing. The method's requirement to "ensure that the rotation axes of both the opening device and the spiral baffle are perpendicular to the reference plane of the opening positioning device" is difficult to achieve, resulting in the hole machining axis not being parallel to the spiral axis. Secondly, the requirement to "flip the spiral baffle to ensure that the rotation axis of the flipped spiral baffle coincides with the rotation axis of the original spiral baffle" is also very difficult to achieve without specific technological means. These errors accumulate, leading to low machining accuracy that fails to meet the increasingly demanding industrial precision requirements. Summary of the Invention

[0005] The purpose of this invention is to solve the problems existing in the prior art and to provide a spiral baffle tube hole processing device and processing method, which improves the tube hole processing accuracy, reduces production costs, increases production efficiency, and realizes the continuity of spiral baffle tube hole processing.

[0006] This invention provides a spiral baffle tube hole processing device, including a control system, a spiral baffle, a hole-opening device, and a spiral baffle support and positioning device. The control system is electrically connected to the hole-opening device. The spiral baffle is sleeved on the spiral baffle support and positioning device.

[0007] The spiral baffle support and positioning device includes an upper template, a lower template, an upper template positioning device, a positioning column, a central tube, and a spiral blade support device. A half-width through hole is opened on the lower template, and the projection of this half-width through hole coincides with the spiral baffle tube hole. Several alignment holes are opened on the upper template, and the projection of these alignment holes coincides with the corresponding through holes on the lower template. The upper template positioning device connects the upper and lower templates through the through holes and alignment holes. The positioning column and the central tube are both placed on the upper template, and the positioning column is detachably connected to the upper template. The axis of the central tube is tangent to the outer wall of the positioning column, and the axis of the central tube coincides with the axis of the spiral baffle. A spiral blade support device is installed on the side wall of the central tube.

[0008] The trajectory of the top of the central tube is consistent with the trajectory of the central hole of the spiral baffle. This prevents the drilling device from touching the top of the central tube during the machining of the spiral baffle, which would affect the machining effect.

[0009] The upper template has several first positioning holes, which coincide with the projection of the pipe holes on the spiral baffle plate. A flip positioning block is detachably installed on the upper template, and the flip positioning block passes through the first positioning holes. After machining half of the pipe holes on the spiral baffle plate, the spiral baffle plate is removed, the flip positioning block is inserted into the first positioning hole, and the spiral baffle plate is flipped over. The half of the spiral baffle plate with the pipe holes is flipped to the bottom and inserted into the flip positioning block, completing the flip positioning.

[0010] The spiral vane support device includes a support arm, an adjusting bolt, and an adjusting nut. The support arm is fixedly connected to the central tube, and the adjusting bolt is connected to the support arm for vertical movement via the adjusting nut. The spiral baffle abuts against the top of the adjusting bolt, providing support for the spiral baffle and allowing it to remain balanced on the upper template without additional devices.

[0011] The adjusting bolt and adjusting nut are connected by threads. Tightening the adjusting bolt allows for adjustment of its height, thereby fine-tuning the position of the spiral baffle and ensuring its balance.

[0012] A method for machining a spiral baffle tube hole includes the following steps:

[0013] S1: Device Assembly: Connect the upper template and the lower template using the upper template positioning device, and install the positioning column on the upper template; first, use the hole-making device to process a half-width through hole on the lower template according to the machining trajectory of the spiral baffle tube hole, and similarly process several alignment holes on the upper template. The projection of the tube hole on the spiral baffle coincides with the through hole on the lower template, and the projection of the tube hole on the spiral baffle coincides with the alignment hole on the upper template. Process a second positioning hole on the upper template and install the positioning column in the second positioning hole.

[0014] S2: The spiral baffle is fitted onto the central tube, the spiral baffle overlaps the spiral blade support device, and the downward-extending tail end of the spiral baffle abuts against the positioning column to complete the positioning of the spiral baffle.

[0015] S3: Machining the tube holes on the spiral baffle plate.

[0016] The sweep angle of the spiral baffle is 180 to 360 degrees.

[0017] In step S3, the spiral baffle is drilled in two stages: first, the pipe holes on the spiral surface within half of the spiral baffle are machined; then, the spiral baffle is flipped over, and the remaining pipe holes on the spiral surface of the spiral baffle are machined.

[0018] The opening direction of the opening device is parallel to the axial direction of the spiral baffle.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This invention, through the establishment of a control system, a spiral baffle, an opening device, and a spiral baffle support and positioning device, achieves precise positioning of the spiral baffle, improves the machining accuracy of the pipe holes, reduces production costs, increases production efficiency, and ensures the continuity of spiral baffle pipe hole machining. The tangential arrangement of the central pipe axis with the outer wall of the positioning column ensures that even with errors between spiral baffles, the projected pipe holes machined from different spiral baffles will coincide.

[0021] 2. Several first positioning holes are made on the upper template. The projection of the first positioning holes coincides with the projection of the pipe holes on the spiral baffle plate. A flip positioning block is detachably installed on the upper template, and the flip positioning block passes through the first positioning hole. After machining half of the pipe holes on the spiral baffle plate, the spiral baffle plate is removed, the flip positioning block is inserted into the first positioning hole, and the spiral baffle plate is flipped over. The half of the spiral baffle plate with the pipe holes is flipped to the bottom and inserted into the flip positioning block, thus completing the flip positioning. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main structure of Embodiment 1 of the present invention;

[0023] Figure 2 This is a top view of the lower template structure.

[0024] Figure 3 This is a top view of the structure of the template.

[0025] Figure 4 This is a schematic diagram of the main structure of the central tube.

[0026] Figure 5 This is a schematic diagram of the main structure of the upper template positioning device;

[0027] Figure 6 This is a schematic diagram of the main structure of the supporting column;

[0028] Figure 7 This is a schematic diagram of the main structure of the flip positioning block;

[0029] Figure 8 This is a top view of the spiral baffle structure.

[0030] Figure 9 This is a schematic diagram of the main structure of the spiral blade support device.

[0031] In the diagram: 1. Lower template; 2. Upper template; 3. Upper template positioning device; 31. First column; 32. Second column; 33. Third column; 4. Positioning column; 5. Spiral blade support device; 51. Adjusting nut; 52. Adjusting bolt; 53. Support arm; 6. Spiral baffle; 7. Central tube; 8. Flipping positioning block; 81. Sixth column; 82. Seventh column; 9. Support column; 91. Fourth column; 92. Fifth column; 10. Through hole; 11. Alignment hole; 12. First positioning hole; 13. Support hole; 14. Second positioning hole. Detailed Implementation

[0032] The present invention will be further described below with reference to embodiments:

[0033] Example 1

[0034] like Figures 1-9 As shown, the spiral baffle tube hole processing device of the present invention includes a control system, a spiral baffle 6, a hole-opening device, and a spiral baffle support and positioning device. The control system is electrically connected to the hole-opening device; the spiral baffle 6 is sleeved on the spiral baffle support and positioning device.

[0035] like Figure 1 As shown, the spiral baffle support and positioning device includes an upper template 2, a lower template 1, an upper template positioning device 3, a positioning column 4, a central tube 7, and a spiral blade support device 5. A half-width through hole 10 is opened on the lower template 1. Figure 2 As shown, the half-width through hole 10 on the lower template 1 coincides with the projection of the pipe hole of the spiral baffle 6. Several alignment holes 11 are opened on the upper template 2, and the projections of the alignment holes 11 coincide with the corresponding through holes 10 on the lower template 1. The upper template positioning device 3 connects the upper template 2 and the lower template 1 through the through holes 10 and the alignment holes 11 respectively. The upper template positioning device 3 includes a first column 31, a second column 32, and a third column 33, as shown... Figure 5As shown, the first column 31 and the third column 33 have the same diameter and are adapted to the alignment hole 11 and the through hole 10. The diameter of the second column 32 is larger than that of the first column 31. The height of the second column 32 determines the distance between the upper template 2 and the lower template 1. The height of the third column 33 is less than the thickness of the lower template 1 to prevent the bottom of the second column 32 from failing to contact the lower template 1 after the third column 33 is inserted into the through hole 10. When the upper template 2 is inserted into the first column 31, the distance between the upper template 2 and the lower template 1 is greater than the height of the second column 32, causing the upper template to... If the plate 2 is unstable and suspended in the air, a support column 9 is also set at the position opposite to the upper template positioning device 3 between the upper template 2 and the lower template 1. A support hole 13 is opened on the upper template 2 corresponding to the support column 9. The support column 9 passes through the support hole 13 to support the upper template 2. The support column 9 includes a fourth column 91 and a fifth column 92. The diameter of the fourth column 91 is adapted to the support hole 13, and the diameter of the fifth column 92 is larger than the diameter of the fourth column 91. The height of the fifth column 92 is the same as the height of the second column 32, thereby ensuring that the distance between the upper template 2 and the lower template 1 remains consistent.

[0036] like Figure 3 As shown, the positioning column 4 and the central tube 7 are both placed on the upper template 2. The upper template 2 is provided with a second positioning hole 14 corresponding to the positioning column 4. When the positioning column 4 is needed, it is inserted into the second positioning hole 14. When the positioning column 4 is not needed, it can be pulled out, thus realizing a detachable connection with the upper template 2. The axis of the central tube 7 is tangent to the outer wall of the positioning column 4. The axis of the central tube 7 coincides with the axis of the spiral baffle 6. A spiral blade support device 5 is provided on the side wall of the central tube 7.

[0037] like Figure 4 As shown, the trajectory of the top of the central tube 7 is consistent with the trajectory of the central hole of the spiral baffle 6. This is to prevent the drilling device from touching the top of the central tube 7 during the machining of the spiral baffle 6, which would affect the machining effect.

[0038] like Figure 3 As shown, several first positioning holes 12 are formed on the upper template 2. The projections of the first positioning holes 12 coincide with the projections of the pipe holes on the spiral baffle 6. A flip positioning block 8 is detachably installed on the upper template 2, and the flip positioning block 8 passes through the first positioning holes 12. The flip positioning block 8 includes a sixth column 81 and a seventh column 82, as shown... Figure 7As shown, the diameter of the sixth column 81 is the same as the diameter of the pipe hole on the spiral baffle 6. After machining half of the pipe hole on the spiral baffle 6, the spiral baffle 6 is removed, and the flipping positioning block 8 is inserted into the first positioning hole 12, that is, the sixth column 81 is inserted into the first positioning hole 12. The spiral baffle 6 is flipped, and the half of the spiral baffle 6 with the pipe hole is flipped to the bottom and inserted into the sixth column 81, completing the flipping positioning. The diameter of the seventh column 82 is set to be larger than the diameter of the sixth column 81. The height of the seventh column 82, the height of the fifth column 92, and the height of the second column 32 are all the same. In use, the seventh column 82, the fifth column 92, and the second column 32 are all between the upper template 2 and the lower template 1, which not only play a positioning role but also a supporting role.

[0039] like Figure 9 As shown, the spiral vane support device 5 includes a support arm 53, an adjusting bolt 52, and an adjusting nut 51. The support arm 53 is fixedly connected to the central tube 7, and the adjusting bolt 52 is connected to the support arm 53 for vertical movement via the adjusting nut 51. The spiral baffle 6 abuts against the adjusting bolt 52, providing support for the spiral baffle 6 and allowing it to remain balanced on the upper template 2 without additional devices. The adjusting bolt 52 and the adjusting nut 51 are connected by threads. Tightening the adjusting bolt 52 adjusts its height, thereby fine-tuning the position of the spiral baffle 6 and ensuring its balance.

[0040] A method for machining a spiral baffle with 6 tube holes includes the following steps:

[0041] S1: Device assembly: Connect the upper template 2 and the lower template 1 through the upper template positioning device 3, and install the positioning column 4 on the upper template 2; firstly, use the hole-making device to process a half-width through hole 10 on the lower template 1 according to the processing trajectory of the pipe hole of the spiral baffle 6, and similarly process a number of alignment holes 11 on the upper template 2. The projection of the pipe hole on the spiral baffle 6 coincides with the through hole 10 on the lower template 1, and the projection of the pipe hole on the spiral baffle 6 coincides with the alignment hole 11 on the upper template 2. Process a second positioning hole 14 on the upper template 2, and install the positioning column 4 in the second positioning hole 14.

[0042] S2: The spiral baffle 6 is sleeved on the central tube 7, the spiral baffle 6 is overlapped on the spiral blade support device 5, and the downward-extending tail end of the spiral baffle 6 abuts against the positioning post 4 to complete the positioning of the spiral baffle 6.

[0043] S3: Machining the pipe holes on the spiral baffle 6. The spiral baffle 6 is machined in two stages. First, the pipe holes on the spiral surface within 1 / 2 range of the spiral baffle 6 are machined. Then, the spiral baffle 6 is flipped over, and the remaining pipe holes on the spiral surface of the spiral baffle 6 are machined.

[0044] The descriptions of the orientation and relative positional relationships of the structures in this invention, such as front, back, left, right, up, and down, do not constitute a limitation of this invention, but are merely for the convenience of description.

Claims

1. A device for machining a spiral baffle tube hole, comprising a control system, a hole-opening device, and a spiral baffle support and positioning device for supporting and positioning a spiral baffle (6), wherein the control system is electrically connected to the hole-opening device, characterized in that, The spiral baffle support and positioning device includes: Lower template (1) and upper template (2); A half-width through hole (10) is provided on the lower template (1), and the projection of the pipe hole of the spiral baffle (6) to be processed coincides with the projection of the pipe hole. The upper template (2) has a corresponding alignment hole (11) that corresponds to the half-width through hole (10) on the lower template (1); The upper template positioning device (3) passes through the alignment hole (11) and the half-width through hole (10) respectively to position and connect the upper template (2) and the lower template (1); A central tube (7) is set on the upper template (2) for connecting the spiral baffle (6), and the axis of the central tube (7) coincides with the axis of the spiral baffle (6); and a positioning column (4) is set on the upper template (2), with the axis of the central tube (7) tangent to the outer wall of the positioning column (4); A spiral blade support device (5) is provided on the side wall of the central tube (7) to provide axial support for the spiral baffle (6); The spiral blade support device (5) includes a support arm (53), an adjusting bolt (52) and an adjusting nut (51). The support arm (53) is fixedly connected to the central tube (7), and the adjusting bolt (52) is connected to the support arm (53) by the adjusting nut (51) moving up and down.

2. The spiral baffle tube hole processing device according to claim 1, characterized in that, The upper template (2) is provided with a number of first positioning holes (12), and the projection of the first positioning holes (12) coincides with the corresponding pipe holes on the spiral baffle (6). The spiral baffle support positioning device also includes a flip positioning block (8), which is detachably set and used to pass through the first positioning holes (12) and the corresponding pipe holes that have been processed on the spiral baffle (6) for positioning after the spiral baffle (6) is flipped.

3. The spiral baffle tube hole processing device according to claim 1 or 2, characterized in that, The top trajectory of the central tube (7) is consistent with the trajectory of the central hole of the spiral baffle (6).

4. The spiral baffle tube hole processing device according to claim 1, characterized in that, The adjusting bolt (52) and the adjusting nut (51) are connected by threads.

5. A method for processing a spiral baffle tube hole, using the processing apparatus according to any one of claims 1-4, characterized in that, Includes the following steps: S1: Device assembly: Connect the upper template (2) to the lower template (1) through the upper template positioning device (3), and install the positioning column (4) on the upper template (2); S2: Workpiece positioning: The spiral baffle (6) is sleeved on the central tube (7), so that the spiral baffle (6) overlaps on the spiral blade support device (5), and the downward-extending tail end of the spiral baffle (6) abuts against the positioning column (4) to complete the positioning of the spiral baffle (6). S3: Pipe hole processing: Use a hole-making device to process the pipe hole on the spiral baffle (6); When the sweep angle of the spiral baffle (6) is 180 to 360 degrees, in step S3, the holes are opened in two steps. First, the pipe holes on the spiral surface within 1 / 2 range of the spiral baffle (6) are processed. Then, the spiral baffle (6) is flipped over and positioned by the flipping positioning block (8). Then, the remaining pipe holes on the spiral surface of the spiral baffle (6) are processed.

6. The method for processing the spiral baffle tube hole according to claim 5, characterized in that, The opening direction of the opening device is parallel to the axial direction of the spiral baffle (6).

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