A round tube straightening mechanism specially used for large-scale wound tube heat exchanger

Abstract

A kind of round tube straightening mechanism specially used for large winding pipe heat exchanger, including section frame, the top surface of section frame is equipped with positioning sleeve by sliding component;The side of section frame is equipped with fixed frame simultaneously with bottom, the side of section frame between two fixed frames is sequentially distributed with multiple conveying wheels from one end to the other end on upper row, sequentially distributed with multiple guide wheels on lower row, a group is formed with single conveying wheel and single guide wheel corresponding, round tube passes between single conveying wheel and single guide wheel;Meshing gear is arranged close to output position, round tube also passes between two gears;Transparent plate is fixed outside fixed frame, and transparent plate covers conveying wheel, guide wheel and gear;' ]'type guide wheel mounting bracket is fixed on the outer end surface of section frame outlet, and auxiliary guide wheel is installed on guide wheel mounting bracket;Adjustment assembly is also installed on the outside of transparent plate, and work is reliable.

Description

Technical Field

[0001] This utility model relates to the field of straightening mechanism technology, and in particular to a round tube straightening mechanism specifically for large wound tube heat exchangers. Background Technology

[0002] Spiral tube heat exchangers have unparalleled advantages over ordinary shell and tube heat exchangers. They are applicable to a wide temperature range, adaptable to thermal shock, self-relief of thermal stress, and have high compactness. Due to their special structure, the flow field is fully developed and there are no dead zones. In particular, by setting up multiple tubes (single shell), multiple fluids can be exchanged simultaneously in one device.

[0003] Spiral coil heat exchangers are highly efficient and compact heat exchangers that not only utilize waste heat but also play a vital role in energy conservation and environmental protection. However, their complex structure, high cost, and location within a critical part of the equipment make them problematic.

[0004] A spiral heat exchanger is made by alternately winding heat transfer tubes in a spiral shape in the space between the core and the outer cylinder. The spiral directions of adjacent spiral heat transfer tubes are opposite, and a spacer of a certain shape is used to maintain a certain distance between them.

[0005] Spiral coiled tubes can be wound as a single strand or as two or more strands welded together and then wound together. A medium can pass through the tube, which is called a single-channel spiral coiled tube heat exchanger.

[0006] One of the most important processes in the manufacturing of wound tube heat exchangers is the tube winding process. Because wound tube heat exchangers have a large diameter, the round tubes need to be straightened before winding. In the existing technology, the straightening of the round tubes is done manually at the head, which is inefficient and labor-intensive for workers, and cannot meet the requirements of use. Utility Model Content

[0007] In response to the shortcomings of the existing production technology, the applicant provides a round tube straightening mechanism specifically designed for large-scale wound tube heat exchangers. This mechanism can straighten the round tubes on the tube coil and then wind them onto the workpiece, meeting the usage requirements and ensuring good winding quality.

[0008] The technical solution adopted in this utility model is as follows:

[0009] A circular tube straightening mechanism specifically designed for large wound tube heat exchangers is disclosed. The mechanism comprises: a profile frame with a positioning sleeve mounted on its top surface via a sliding assembly; fixed frames mounted on the sides and bottom of the profile frame; multiple conveying wheels arranged sequentially from one end to the other on the upper side of the profile frame between the two fixed frames, and multiple guide wheels arranged sequentially on the lower side, with each conveying wheel and guide wheel forming a pair; a circular tube passing between each conveying wheel and guide wheel; meshing gears arranged near the output position, with a circular tube also passing between the two gears; a transparent plate fixed to the outside of the fixed frames, covering the conveying wheels, guide wheels, and gears; a "]"-shaped guide wheel mounting bracket fixed to the outer end face of the profile frame output port, with auxiliary guide wheels mounted on the bracket; and an adjustment assembly mounted on the outside of the transparent plate.

[0010] As a further improvement to the above technical solution:

[0011] The positioning sleeve has a rectangular hole.

[0012] The sliding assembly has the following structure: it includes a sliding seat that slides in conjunction with the top surface of the profile frame, and a positioning sleeve is installed on the top of the sliding seat via connectors and fasteners.

[0013] The gear includes a driving gear and a driven gear, and pulleys are coaxially mounted on the inner sides of both the driving gear and the driven gear.

[0014] The structure of the adjustment component is as follows: it includes a fixed plate, which is locked to a transparent plate by fasteners. Limiting plates are installed on the top surface of the fixed plate and the ground, respectively. A guide rail plate is provided on the fixed plate. Upper and lower sliders are distributed at intervals on the outer side of the guide rail plate. The upper slider fixes the first right-angle frame, and the lower slider fixes the second right-angle frame. A cylinder is installed between the first and second right-angle frames. A third right-angle frame is fixed to the outer side of the first right-angle frame. A gear motor is also installed on the third right-angle frame. The output end of the gear motor passes through the third right-angle frame and is connected to the driving gear. A fourth right-angle frame is fixed to the outer side of the second right-angle frame. The fourth right-angle frame is connected to the driven gear through a pin.

[0015] The limiting plate has a right-angled structure.

[0016] The bottom of the cylinder is fixed to the second right-angle bracket, and the head of the cylinder's piston rod is fixed to the first right-angle bracket. The extension and retraction of the cylinder causes the first and second right-angle brackets to slide, thereby causing the third and fourth right-angle brackets to slide up and down, thus adjusting the distance between the driving gear and the driven gear.

[0017] The auxiliary guide wheel is installed vertically, and a circular tube passage space is formed between the auxiliary guide wheel and the inner side of the guide wheel mounting frame.

[0018] There are three conveyor wheels and three guide wheels. The first and second groups of conveyor wheels and guide wheels are arranged alternately, and the third group of conveyor wheels and guide wheels are arranged vertically. Gears are installed between the second group of conveyor wheels and guide wheels and the third group of conveyor wheels and guide wheels.

[0019] Each conveyor wheel and each guide wheel has a recess on its outer circumference that matches the circular tube.

[0020] The beneficial effects of this utility model are as follows:

[0021] This utility model has a compact and reasonable structure and is easy to operate. Through the unique design of the straightening mechanism, the round tube of the raw material can be straightened after passing through the straightening mechanism, which facilitates the subsequent winding work and brings great convenience to the winding heat exchanger.

[0022] This invention can conveniently and quickly straighten wound round tubes, ensuring the reliability of the winding process.

[0023] This utility model is designed with a gear clearance adjustment component, which can be adjusted according to the actual diameter of the round tube, making it flexible and versatile and reducing costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the installation of this utility model.

[0025] Figure 2 for Figure 1 A magnified view of part A in the middle.

[0026] Figure 3 This is a schematic diagram of the structure of this utility model.

[0027] Figure 4 This is a structural schematic diagram from another perspective of the present invention.

[0028] Figure 5 This is a structural schematic diagram of the present invention from another perspective.

[0029] Figure 6 This is an exploded view of the present invention (the transparent plate and the No. 4 right-angle frame are omitted).

[0030] The components are as follows: 100, tube coil; 200, column; 300, cantilever; 400, vertical frame; 500, connecting frame; 600, horizontal frame; 700, straightening mechanism; 800, connecting rod; 900, converging guide; 1000, pressure roller; 1100, mounting base; 1200, side arm; 1300, guide rail; 1400, base.

[0031] 7001, Positioning sleeve; 7002, Rectangular hole; 7003, Profile frame; 7004, Sliding seat; 7005, Fixing frame; 7006, Transparent plate; 7007, Limiting plate; 7008, Fixing plate; 7009, No. 1 right-angle frame; 70010, Guide rail plate; 70011, Upper slider; 70012, No. 3 right-angle frame; 70013, Lower slider; 70014, No. 2 right-angle frame; 70015, No. 4 right-angle frame; 70016, Gear motor; 70017, Auxiliary guide wheel; 70018, Cylinder; 70019, Conveying wheel; 70020, Driving gear; 70021, Driven gear; 70022, Guide wheel mounting bracket; 70023, Guide wheel. Detailed Implementation

[0032] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0033] like Figures 1-6 As shown, the circular tube straightening mechanism 700 of this embodiment, specifically designed for large wound tube heat exchangers, has the following specific structure: it includes a profile frame 7003, with a positioning sleeve 7001 mounted on the top surface of the profile frame 7003 via a sliding assembly; fixing frames 7005 are simultaneously mounted on the side and bottom of the profile frame 7003; multiple conveying wheels 70019 are sequentially distributed in the upper row on the side of the profile frame 7003 between the two fixing frames 7005, and multiple guide wheels 70023 are sequentially distributed in the lower row; each conveying wheel 70019 corresponds to a single guide wheel 70023. A set of circular tubes passes between a single conveyor wheel 70019 and a single guide wheel 70023; meshing gears are arranged near the output position, with a circular tube also passing between the two gears; a transparent plate 7006 is fixed on the outside of the fixed frame 7005, covering the conveyor wheel 70019, guide wheel 70023 and gears; an "]"-shaped guide wheel mounting bracket 70022 is fixed on the outer end face of the output port of the profile frame 7003, and an auxiliary guide wheel 70017 is installed on the guide wheel mounting bracket 70022; an adjustment component is also installed on the outside of the transparent plate 7006.

[0034] The positioning sleeve 7001 has a rectangular hole 7002 for easy installation onto the trolley.

[0035] The sliding assembly has the following structure: it includes a sliding seat 7004 that slides in conjunction with the top surface of the profile frame 7003. A positioning sleeve 7001 is installed on the top of the sliding seat 7004 through connectors and fasteners to facilitate position adjustment and ensure the reliability of straightening.

[0036] The gears include a driving gear 70020 and a driven gear 70021, and pulleys are coaxially mounted on the inner sides of both the driving gear 70020 and the driven gear 70021.

[0037] The structure of the adjustment component is as follows: it includes a fixing plate 7008, which is locked to a transparent plate 7006 by fasteners. Limiting plates 7007 are respectively installed on the top surface and the ground of the fixing plate 7008. A guide rail plate 70010 is provided on the fixing plate 7008. Upper sliders 70011 and lower sliders 70013 are distributed at intervals on the outer side of the guide rail plate 70010. The upper slider 70011 fixes the first right-angle frame 7009, and the lower slider 70013 fixes the second right-angle frame 70014. The first right-angle frame 7009 and the second right-angle frame 70014 are connected... A cylinder 70018 is installed in the middle; a third right-angle bracket 70012 is fixed to the outside of the first right-angle bracket 7009. A gear motor 70016 is also installed on the third right-angle bracket 70012. The output end of the gear motor 70016 passes through the third right-angle bracket 70012 and is connected to the driving gear 70020. A fourth right-angle bracket 70015 is fixed to the outside of the second right-angle bracket 70014. The fourth right-angle bracket 70015 is connected to the driven gear 70021 through a pin. The clearance can be easily adjusted by the cylinder 70018, making it flexible and convenient to use.

[0038] The limiting plate 7007 has a right-angled structure.

[0039] The bottom of cylinder 70018 is fixed to the second right-angle bracket 70014, and the piston rod head of cylinder 70018 is fixed to the first right-angle bracket 7009. The extension and retraction of cylinder 70018 causes the first right-angle bracket 7009 and the second right-angle bracket 70014 to slide, thereby causing the third right-angle bracket 70012 and the fourth right-angle bracket 70015 to slide up and down, thereby adjusting the distance between the driving gear 70020 and the driven gear 70021.

[0040] The auxiliary guide wheel 70017 is installed vertically, and a circular tube passage space is formed between the auxiliary guide wheel 70017 and the inner side of the guide wheel mounting bracket 70022.

[0041] There are three conveyor wheels 70019 and three guide wheels 70023. The first and second groups of conveyor wheels 70019 and guide wheels 70023 are arranged alternately, and the third group of conveyor wheels 70019 and guide wheels 70023 are arranged vertically in correspondence. Gears are installed between the second group of conveyor wheels 70019 and guide wheels 70023 and between the third group of conveyor wheels 70019 and guide wheels 70023.

[0042] Each conveyor wheel 70019 and each guide wheel 70023 has a recess on its outer circumference that matches the round tube, ensuring smooth and stable conveying of the round tube.

[0043] like Figure 1 and Figure 2 As shown, in actual operation, the straightening mechanism 700 described in this embodiment is installed on a mobile trolley. The specific structure of the mobile trolley is as follows:

[0044] The system includes a guide rail 1300, a base 1400 that moves along the guide rail 1300, a column 200 vertically mounted at the center of the top surface of the base 1400, and four tube discs 100 arranged on both sides of the column 200 (in actual applications, more than one tube disc 100 can be installed according to product requirements; this embodiment uses four tube discs 100 as an example). Two tube discs 100 form a group. Lifting mechanisms for controlling the up-and-down movement of the tube discs 100 are installed on the top and sides of the column 200; these lifting mechanisms can be screw and nut mechanisms or other mechanisms. A cantilever 300 is vertically mounted above the column 200, and a vertical frame 400 is fixed on the cantilever 300. A horizontal frame 600 is fixed to the outside of the vertical frame 400 via a connecting frame 500. Straightening mechanisms 700 are installed at both ends of the horizontal frame 600. In this embodiment, four straightening mechanisms 700 are installed, each corresponding to one of the four tube discs 100. The end of the cantilever 300 is also fixed with a connecting rod 800. The head of the connecting rod 800 is fixed with a general guide 900 and a slender side arm 1200. The head of the side arm 1200 is mounted with a pressure roller 1000 through a mounting seat 1100. The pressure roller 1000 presses down on four round tubes.

[0045] When straightening is actually required, the round tubes of the raw material are output through the tube disc 100 and enter the corresponding straightening mechanism 700. Specifically, they first enter between the first two sets of conveyor wheels 70019 and guide wheels 70023, then enter the pulley between the drive gear 70020 and the driven gear 70021, then enter between the conveyor wheel 70019 and guide wheel 70023 at the very end of the output port, and finally exit through the auxiliary guide wheel 70017. Subsequently, the four round tubes enter the converging guide member 900 together, and are then pressed by the pressure roller 1000. They can then be wound around the rotating workpiece. The whole process is convenient to use and has good working reliability.

[0046] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A circular tube straightening mechanism specifically designed for large wound tube heat exchangers, characterized in that: The straightening mechanism (700) has the following specific structure: it includes a profile frame (7003), the top surface of which is fitted with a positioning sleeve (7001) via a sliding assembly; the profile frame (7003) has fixing frames (7005) installed on its side and bottom; multiple conveying wheels (70019) are arranged sequentially on the upper side of the profile frame (7003) between the two fixing frames (7005) from one end to the other, and multiple guide wheels (70023) are arranged sequentially on the lower side; a single conveying wheel (70019) and a single guide wheel (70023) correspond to form a group; and the circular tube flows from a single conveying wheel. (70019) passes between itself and a single guide wheel (70023); meshing gears are arranged near the output position, and a round tube passes between the two gears; a transparent plate (7006) is fixed on the outside of the fixed frame (7005), and the transparent plate (7006) covers the conveyor wheel (70019), guide wheel (70023) and gears; a "]"-shaped guide wheel mounting bracket (70022) is fixed on the outer end face of the output port of the profile frame (7003), and an auxiliary guide wheel (70017) is installed on the guide wheel mounting bracket (70022); an adjustment component is also installed on the outside of the transparent plate (7006).

2. The circular tube straightening mechanism specifically designed for large wound tube heat exchangers as described in claim 1, characterized in that: A rectangular hole (7002) is opened on the positioning sleeve (7001).

3. A circular tube straightening mechanism specifically designed for large wound tube heat exchangers as described in claim 1, characterized in that: The sliding assembly has the following structure: it includes a sliding seat (7004) that slides in cooperation with the top surface of the profile frame (7003), and a positioning sleeve (7001) is installed on the top of the sliding seat (7004) through connectors and fasteners.

4. A circular tube straightening mechanism specifically designed for large wound tube heat exchangers as described in claim 1, characterized in that: The gears include a driving gear (70020) and a driven gear (70021), and pulleys are coaxially mounted on the inner sides of both the driving gear (70020) and the driven gear (70021).

5. A circular tube straightening mechanism specifically designed for large wound tube heat exchangers as described in claim 4, characterized in that: The structure of the adjustment assembly is as follows: it includes a fixing plate (7008), which is locked to a transparent plate (7006) by fasteners. Limiting plates (7007) are installed on the top surface and the ground of the fixing plate (7008) respectively. A guide rail plate (70010) is provided on the fixing plate (7008). An upper slider (70011) and a lower slider (70013) are distributed at intervals on the outer side of the guide rail plate (70010). The upper slider (70011) fixes the first right-angle frame (7009), and the lower slider (70013) fixes the second right-angle frame (70014). The first right-angle frame... A cylinder (70018) is installed between (7009) and the second right-angle bracket (70014); a third right-angle bracket (70012) is fixed to the outside of the first right-angle bracket (7009), and a gear motor (70016) is also installed on the third right-angle bracket (70012). The output end of the gear motor (70016) passes through the third right-angle bracket (70012) and is connected to the driving gear (70020). A fourth right-angle bracket (70015) is fixed to the outside of the second right-angle bracket (70014), and the fourth right-angle bracket (70015) is connected to the driven gear (70021) through a pin.

6. A circular tube straightening mechanism specifically designed for large wound tube heat exchangers as described in claim 5, characterized in that: The limiting plate (7007) has a right-angled structure.

7. A circular tube straightening mechanism specifically designed for large wound tube heat exchangers as described in claim 5, characterized in that: The bottom of the cylinder (70018) is fixed to the second right-angle bracket (70014), and the piston rod head of the cylinder (70018) is fixed to the first right-angle bracket (7009). The extension and retraction of the cylinder (70018) causes the first right-angle bracket (7009) and the second right-angle bracket (70014) to slide, thereby causing the third right-angle bracket (70012) and the fourth right-angle bracket (70015) to slide up and down, thereby adjusting the distance between the driving gear (70020) and the driven gear (70021).

8. A circular tube straightening mechanism specifically designed for large wound tube heat exchangers as described in claim 1, characterized in that: The auxiliary guide wheel (70017) is installed vertically, and a circular tube passage space is formed between the auxiliary guide wheel (70017) and the inner side of the guide wheel mounting bracket (70022).

9. A circular tube straightening mechanism specifically designed for large wound tube heat exchangers as described in claim 1, characterized in that: There are three conveyor wheels (70019) and three guide wheels (70023). The first and second groups of conveyor wheels (70019) and guide wheels (70023) are arranged alternately. The third group of conveyor wheels (70019) and guide wheels (70023) are arranged vertically in correspondence. Gears are installed between the second group of conveyor wheels (70019) and guide wheels (70023) and the third group of conveyor wheels (70019) and guide wheels (70023).

10. A circular tube straightening mechanism specifically for large wound tube heat exchangers as described in claim 9, characterized in that: Each conveyor wheel (70019) and each guide wheel (70023) has a recess on its outer circumference that matches the circular tube.

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