Plate rolling device for hollow spiral plate heat exchanger

Abstract

The invention discloses a plate rolling device for a hollow spiral plate heat exchanger. The plate rolling device comprises a rack, a rolling roller, a driving mechanism and a pressing assembly. The rolling roller is rotationally installed on the rack along the axis in the first direction, a plurality of inserting grooves are formed in the circumference of the rolling roller, the inserting grooves extend in the first direction, the inserting grooves are evenly distributed in the axial direction of the rolling roller, and the inserting grooves are used for allowing one end of a heat exchange plate to be inserted; the driving mechanism is arranged on the rack, and the driving mechanism is connected with the rolling roller so as to drive the rolling roller to rotate; the pressing assembly is movably installed on the rack in the vertical direction and located above the rolling roller, and the pressing assembly is used for pressing a heat exchange plate on the rolling roller or the adjacent heat exchange plate. By arranging the multiple inserting grooves, heat exchangers with different channel numbers can be rolled, and the application range is wide.

Description

Technical Field

[0001] The invention relates to the technical field of spiral plate heat exchanger rolling equipment, and in particular to a plate rolling device for a hollow spiral plate heat exchanger. Background Art

[0002] The spiral plate is a spiral body made of two steel plates in two uniform directions. The two spiral channels between the two steel plates are filled with hot and cold liquids for convective heat transfer. In order to enhance the strength of the steel plate and increase the critical pressure of the spiral body, a certain density of distance columns are welded on the same surface of the two steel plates, which can increase the turbulence of the medium and thus improve the heat exchange efficiency. The spiral plate processing is generally carried out using a plate rolling machine.

[0003] Patent CN210876891U discloses a plate rolling machine for spiral plate processing, including a plate rolling machine body, a power supply box is fixedly installed on the top of the plate rolling machine body, a base is fixedly connected to one side of the plate rolling machine body, a fixed pad is fixedly installed on the top of the base, lower support columns are fixedly installed on the top of the base and on both sides of the fixed pad, an upper support frame is fixedly connected to the top of the lower support column, a wrapping pad is fixedly installed on the outer side of the upper support frame, and an adjusting roller is fixedly installed on the top of the fixed pad.

[0004] However, the above-mentioned prior art cannot roll a multi-channel heat exchanger, has a narrow scope of application, and is not conducive to enterprise production. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and propose a plate rolling device for a hollow spiral plate heat exchanger to solve the technical problems in the prior art that a multi-channel heat exchanger cannot be rolled, the scope of application is narrow, and it is not conducive to enterprise production.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides a plate rolling device for a hollow spiral plate heat exchanger, comprising: frame; A winding roller, the winding roller is rotatably mounted on the frame along an axis in a first direction, a plurality of slots are provided on the circumference of the winding roller, the slots extend along the first direction, the plurality of slots are evenly arranged along the axial direction of the winding roller, and the slots are used for inserting one end of the heat exchange plate; a driving mechanism, disposed on the frame, the driving mechanism being connected to the winding roller to drive the winding roller to rotate; and A pressing assembly is movably mounted on the frame in a vertical direction and is located above the winding roller. The pressing assembly is used to press the heat exchange plate onto the winding roller or an adjacent heat exchange plate.

[0007] In some embodiments, the winding roller includes a rotating shaft and a plurality of arc-shaped roller plates, wherein the rotating shaft is rotatably mounted on the frame along an axis in a first direction, and the plurality of arc-shaped roller plates are arranged at intervals along the circumference of the rotating shaft, and both ends of each of the arc-shaped roller plates are connected to the rotating shaft through a first connecting member, wherein the gap between two adjacent arc-shaped roller plates constitutes the slot.

[0008] In some embodiments, the width of the slot ranges from 20 mm to 40 mm.

[0009] In some embodiments, the first connecting member is detachably connected to the rotating shaft and the arc roller plate.

[0010] In some embodiments, the clamping assembly includes a mounting seat, a clamping roller and a driving assembly. The mounting seat is movably mounted on the frame in a vertical direction, the clamping roller is rotatably mounted on the mounting seat along an axis in a first direction, the clamping roller is used to press the heat exchange plate onto the winding roller, and the driving assembly is connected to the mounting seat to drive the mounting seat to move.

[0011] In some embodiments, the plate rolling device for the hollow spiral plate heat exchanger also includes a limiting component, which is arranged on the frame and spaced apart from the rolling roller along the material conveying direction, and the limiting component is used to limit the heat exchange plate to limit the movement of the heat exchange plate in the first direction.

[0012] In some embodiments, the limiting assembly includes two limiting rollers, which are arranged at intervals along a first direction, each limiting roller is rotatably installed on the frame along an axis in a vertical direction, and the area between the two limiting rollers is used for the heat exchange plate to pass through.

[0013] In some embodiments, each of the limiting rollers is movably arranged along the first direction so that the distance between the two limiting rollers is adjustable.

[0014] In some embodiments, the frame is provided with an elongated hole, the elongated hole is extended along the first direction, and a stud is provided at the end of the limiting roller, and the stud passes through the elongated hole and is threadedly connected with a nut.

[0015] In some embodiments, the plate rolling device for the hollow spiral plate heat exchanger further includes a conveying roller group, wherein the conveying roller group, the limiting assembly and the rolling roller are arranged at intervals along the material conveying direction, and the conveying roller group is used to convey the heat exchange plate.

[0016] Compared with the prior art, the present invention provides a plate rolling device for a hollow spiral plate heat exchanger, wherein the circumferential surface of the rolling roller is provided with slots extending along its axial direction, and a plurality of the slots are evenly arranged along the circumference of the rolling roller, and each of the slots can be inserted with a heat exchange plate, and the clamping assembly can provide a vertical downward clamping force, thereby assisting the rolling roller in rolling the heat exchange plate. When used, the distance columns are fixed on the heat exchange plate by resistance welding, and the distance columns are kept evenly distributed, and the flat steel closing strips are spot welded on the heat exchange plate to be fixed to the heat exchange plate. Roll together, bend one end of the heat exchange plate and insert it into one of the slots, start the driving mechanism, and after the rolling roller rotates to the set angle, insert the second heat exchange plate in the adjacent slot, and then insert the remaining heat exchange plates in the same way, and finally roll to the required number of turns, fix the entire roll as a whole on the end face of the rolled heat exchanger by spot welding, and then remove the rolling roller to carry out the step of heat exchanger production. The present application can roll heat exchangers with different numbers of channels by setting multiple slots, and has a wide range of applications.

[0017] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail as follows with reference to the accompanying drawings. The specific implementation of the present invention is given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment of a plate rolling device for a hollow spiral plate heat exchanger provided by the present invention; Figure 2 yes Figure 1 The front view of the plate rolling device for the hollow spiral plate heat exchanger; Figure 3 yes Figure 1 The left side view of the plate rolling device for the hollow spiral plate heat exchanger; Figure 4 yes Figure 1 A top view of a plate rolling device for a hollow spiral plate heat exchanger; Figure 5 yes Figure 1 A three-dimensional schematic diagram of the middle rolling roller; Figure 6 yes Figure 1 Left side view of the middle clamping assembly; Figure 7 yes Figure 1 The main view of the first gantry; Figure 8 yes Figure 1 A three-dimensional schematic diagram of the middle limit assembly.

[0019] Description of reference numerals: 1-frame, 11-first gantry, 12-second gantry, 13-long hole, 14-screw connection, 2-winding roller, 21-slot, 22-rotating shaft, 23-arc roller plate, 24-first connecting piece, 25-second connecting piece, 3-driving mechanism, 31-pulley, 32-belt, 33-driving motor, 4-clamping assembly, 41-mounting seat, 42-clamping roller, 43-driving assembly, 44-guide rod, 5-limiting assembly, 51-limiting roller, 52-nut, 6-conveying roller group. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] In order to solve the technical problems in the prior art that multi-channel heat exchangers cannot be rolled, the scope of application is narrow, and it is not conducive to enterprise production, the present invention provides a rolling device for a hollow spiral plate heat exchanger, which can roll heat exchangers with different numbers of channels and has a wide scope of application.

[0022] See also Figure 1 , Figure 1 It is a schematic structural diagram of a plate rolling device for a hollow spiral plate heat exchanger in one embodiment of the present invention.

[0023] The present invention provides a plate rolling device for a hollow spiral plate heat exchanger, comprising a frame 1, a rolling drum, a driving mechanism 3 and a pressing assembly 4; the rolling drum 2 is rotatably installed on the frame 1 along an axis in a first direction, a plurality of slots 21 are provided on the circumference of the rolling drum 2, the slots 21 extend along the first direction, and the plurality of slots 21 are evenly arranged along the axial direction of the rolling drum 2, and the slots 21 are used for inserting one end of a heat exchange plate; the driving mechanism 3 is provided on the frame 1, and the driving mechanism 3 is connected to the rolling drum 2 to drive the rolling drum 2 to rotate; the pressing assembly 4 is movably installed on the frame 1 along a vertical direction and is located above the rolling drum 2, and the pressing assembly 4 is used to press the heat exchange plate onto the rolling drum 2 or an adjacent heat exchange plate.

[0024] In this example, see Figures 2 to 5The circumferential surface of the winding roller 2 is provided with slots 21 extending along its axial direction. The plurality of slots 21 are evenly arranged along the circumference of the winding roller 2. Each slot 21 can be inserted with a heat exchange plate. The clamping assembly 4 can provide a vertical downward clamping force, thereby assisting the winding roller 2 in rolling the heat exchange plate. When in use, the distance columns are fixed on the heat exchange plate by resistance welding. The distance columns are evenly distributed. The flat steel closing strip is spot welded on the heat exchange plate and rolled together with the heat exchange plate. One end of the heat exchange plate is bent. After that, it is inserted into one of the slots 21, and the driving mechanism 3 is started. After the winding roller 2 rotates to the set angle, the second heat exchange plate is inserted into the adjacent slot 21, and then the remaining heat exchange plates are inserted in the same steps. Finally, it is rolled to the required number of turns, and the entire roll is fixed as a whole on the end face of the rolled heat exchanger by spot welding. Then the winding roller 2 can be removed to carry out a step of heat exchanger manufacturing. The present application can roll heat exchangers with different numbers of channels by setting multiple slots 21, and has a wide range of applications.

[0025] In one embodiment, see Figure 5 The winding roller 2 includes a rotating shaft 22 and a plurality of arc-shaped roller plates 23. The rotating shaft 22 is rotatably mounted on the frame 1 along an axis in a first direction. The plurality of arc-shaped roller plates 23 are arranged at intervals along the circumference of the rotating shaft 22. Both ends of each of the arc-shaped roller plates 23 are connected to the rotating shaft 22 through a first connecting member 24, wherein the gap between two adjacent arc-shaped roller plates 23 constitutes the slot 21.

[0026] In this embodiment, the shapes of the plurality of arc-shaped roller plates 23 are consistent and are evenly arranged on the circumference of the rotating shaft 22. The arc-shaped roller plates 23 are connected and fixed to the rotating shaft 22 via the first connecting member 24. The outer arc-shaped surface of the arc-shaped roller plates 23 is used for rolling the heat exchange plate. Such a configuration facilitates processing and manufacturing.

[0027] In one embodiment, the width of the slot 21 is in the range of 20 mm to 40 mm. By setting the width of the slot 21 in the range of 20 mm to 40 mm, it is convenient to insert the heat exchange plate, and can adapt to heat exchange plates of different thicknesses.

[0028] In one embodiment, see Figure 5 The first connecting member 24 is detachably connected to the rotating shaft 22 and the arc roller plate 23.

[0029] In this embodiment, in order to facilitate processing and assembly, the first connecting member 24 and the rotating shaft 22 are detachably connected, and the first connecting member 24 and the arc roller plate 23 are also detachably connected. In this way, the first connecting member 24, the rotating shaft 22 and the arc roller plate 23 can be manufactured separately and then assembled.

[0030] Specifically, arc plates are provided at the two opposite ends of the inner side of the arc roller plate 23, and the rotating shaft 22 is provided with two connecting plates corresponding to the arc plates. One end of the first connecting member 24 is bolted to the arc plate, and the other end of the first connecting member 24 is bolted to the connecting plate.

[0031] Furthermore, in order to improve the connection strength, a second connecting member 25 is connected between two adjacent arc-shaped roller plates 23. The second connecting member 25 is provided to connect and fix the adjacent arc-shaped roller plates 23, thereby improving the strength of the entire winding roller 2.

[0032] Specifically, two ends of the second connecting member 25 are respectively connected to two adjacent arc-shaped plate bolts.

[0033] In one embodiment, see Figure 6 The clamping assembly 4 includes a mounting seat 41, a clamping roller 42 and a driving assembly 43. The mounting seat 41 is movably mounted on the frame 1 along a vertical direction. The clamping roller 42 is rotatably mounted on the mounting seat 41 along an axis in a first direction. The clamping roller 42 is used to clamp the heat exchange plate onto the winding roller 2. The driving assembly 43 is connected to the mounting seat 41 to drive the mounting seat 41 to move.

[0034] In this embodiment, a first gantry 11 is provided on the upper side of the frame 1, and the mounting seat 41 is movably installed on the lower side of the first gantry 11 along the vertical direction and is located above the winding roller 2. The pressure roller 42 is rotatably installed on the lower side of the mounting seat 41, so that when the mounting seat 41 moves downward, the pressure roller 42 can press the heat exchange plate against the winding roller 2, and the rotating setting of the mounting roller is beneficial to reducing the friction with the heat exchange plate. The driving component 43 is provided on the first gantry 11, and the driving component 43 is connected to the mounting seat 41, so as to drive the mounting seat 41 to move in the vertical direction.

[0035] For further information, see Figure 6The gantry is provided with two guide holes, and the two guide holes are arranged at intervals along the first direction. The clamping assembly 4 also includes two guide rods 44, and the two guide rods 44 correspond to the two guide holes one by one. The guide rods 44 are slidably installed in the guide holes, and the lower ends of the two guide rods 44 are respectively connected to the two ends of the mounting seat 41, so as to realize the movement of the mounting seat 41 along the vertical direction.

[0036] Furthermore, the driving assembly 43 includes a driving cylinder, which is mounted on the first gantry 11 , and a push rod of the driving cylinder is arranged downward, and the push rod of the driving cylinder is connected to the middle of the mounting seat 41 .

[0037] In another embodiment, a threaded hole is penetrated in the middle of the first gantry 11, and the driving assembly 43 includes a screw rod, the lower end of which is rotatably mounted on the mounting seat 41 along an axis in the vertical direction, and the screw rod is threadably matched with the first gantry 11, so that the mounting seat 41 is driven to move by rotating the screw rod.

[0038] In this embodiment, the winding roller 2 is detachably connected to the frame 1 .

[0039] Furthermore, a groove is provided on the upper side of the frame 1, and the groove is adapted to the rotating shaft 22. The rotating shaft 22 is rotatably installed in the groove. When disassembly is required, the winding roller 2 can be lifted by a lifting device to complete the disassembly.

[0040] In the present embodiment, in order to prevent the first gantry 11 from interfering with the disassembly of the winding roller 2, the lower end of the first gantry 11 is rotatably installed on the frame 1 along the axis in the first direction, so that the first gantry 11 has the function of rotating downward to a horizontal avoidance state and rotating upward to a vertical working state. When the heat exchange plate is rolled, the first gantry 11 is rotated to the working state. At this time, the clamping assembly 4 is located above the winding roller 2 and can cooperate with the winding roller 2 to roll the heat exchange plate. When the heat exchange plate is rolled, the first gantry 11 is rotated to the avoidance state. At this time, the clamping assembly 4 is located beside the winding roller 2, that is, the winding roller 2 and the clamping assembly 4 are spaced apart along the conveying direction. With this arrangement, the winding roller 2 can be removed from the frame 1, which is convenient for disassembly of the heat exchange plate.

[0041] In this example, see Figure 7 The plate rolling device for the hollow spiral plate heat exchanger also includes a locking assembly, which is arranged on the frame 1. When the first gantry 11 is in the working state, the locking assembly is connected to the first gantry 11 to limit the rotation of the first gantry 11.

[0042] Further, the frame 1 is provided with a first through hole, the first gantry 11 is provided with a second through hole, and when the first gantry 11 is in the working state, the first through hole corresponds to the second through hole, and the locking assembly includes a screw connection 14, and the screw connection 14 passes through the first through hole and the second through hole to fix the first gantry 11 to the frame 1. When the first gantry 11 needs to be rotated, the screw connection 14 can be removed.

[0043] In one embodiment, see Figure 8 The plate rolling device for the hollow spiral plate heat exchanger also includes a limiting component 5, which is arranged on the frame 1 and is spaced apart from the rolling roller 2 along the material conveying direction. The limiting component 5 is used to limit the heat exchange plate to limit the movement of the heat exchange plate in the first direction.

[0044] In this embodiment, the material conveying direction is perpendicular to the first direction, and the heat exchange plate is arranged in a long plate shape. During the rolling process, the heat exchange plate will be continuously wound on the rolling roller 2, and the unrolled part of the heat exchange plate will be offset, resulting in poor quality of the rolled heat exchanger. Therefore, a limiting component 5 is also provided on the front side of the rolling roller 2, and the limiting component 5 can limit the heat exchange plate to prevent it from offset.

[0045] In one embodiment, see Figure 8 The limiting assembly 5 includes two limiting rollers 51, which are arranged at intervals along the first direction, and each limiting roller 51 is rotatably installed on the frame 1 along an axis in the vertical direction, and the area between the two limiting rollers 51 is used for the heat exchange plate to pass through.

[0046] In this embodiment, a second gantry 12 is further provided on the upper side of the frame 1, and the second gantry 12 and the winding roller 2 are arranged at intervals along the material conveying direction, and the limiting roller 51 is extended in the vertical direction, and the two ends of the limiting roller 51 are rotatably installed on the frame 1 and the second gantry 12 respectively, and the two limiting rollers 51 are arranged at intervals along the first direction, and the distance between the two limiting rollers 51 is equal to the width of the heat exchange plate. During the rolling process, the two sides of the heat exchange plate in the width direction abut against the two limiting rollers 51, so that the heat exchange plate is limited by the limiting rollers 51, and the rotating setting of the limiting roller 51 is beneficial to reducing the friction with the heat exchange plate.

[0047] Specifically, the limiting roller 51 includes a connecting shaft and a roller, both ends of the connecting shaft are installed on the frame 1 and the second gantry 12, and the roller is rotatably installed on the outer periphery of the connecting shaft.

[0048] In one embodiment, see Figure 8 Each of the limiting rollers 51 is movably arranged along the first direction so that the distance between the two limiting rollers 51 is adjustable.

[0049] In this embodiment, since the widths of the heat exchange plates of different models of heat exchangers are also different, in order to be able to limit the heat exchange plates of different widths, the two limiting rollers 51 can be movably arranged along the first direction, so as to adjust the distance between the two limiting rollers 51 to adapt to the heat exchange plates of different widths.

[0050] In one embodiment, the frame 1 is provided with an elongated hole 13 extending along a first direction, and a stud is provided at the end of the limiting roller 51 , and the stud passes through the elongated hole 13 and is threadedly connected with a nut 52 .

[0051] In this embodiment, the frame 1 and the second gantry 12 are both provided with elongated holes 13, and the two elongated holes 13 correspond to each other. The outer circumferences of both ends of the connecting shaft are provided with external threads to form the studs. The two ends of the connecting shaft are passed through the two elongated holes 13. The nut 52 is threadedly connected to the connecting shaft to achieve the installation of the connecting shaft, and the connecting shaft can move in the elongated holes 13 to achieve the adjustment of the limiting roller 51.

[0052] In this embodiment, the plate rolling device for the hollow spiral plate heat exchanger further includes a conveying roller group 6, wherein the conveying roller group 6, the limiting assembly 5 and the rolling roller 2 are arranged at intervals along the material conveying direction, and the conveying roller group 6 is used to convey the heat exchange plate.

[0053] In this embodiment, the driving mechanism 3 includes two pulleys 31, a belt 32 and a driving motor 33. The two pulleys 31 are respectively installed on one end of the rotating shaft 22 and the main shaft of the driving motor 33. The driving motor 33 is installed on the frame 1. The belt 32 connects the two pulleys 31, thereby driving the rotating shaft 22 to rotate through the driving motor 33.

[0054] In order to better understand the present invention, the following Figures 1 to 8 The technical solution of the present invention is described in detail: First, the mounting seat 41 is driven to move by the driving component 43, and the position of the pressing roller 42 is adjusted to make its pressure match the material of the heat exchange plate and the closing strip. At the same time, the distance between the two limiting rollers 51 is adjusted to make it consistent with the width of the heat exchange plate. Then, the distance columns are fixed to the heat exchange plate by resistance welding, and the distance columns are kept evenly distributed. The flat steel closing strip is spot welded to the heat exchange plate and rolled together with the heat exchange plate. One end of the heat exchange plate is bent and inserted into the slot 21, and the driving motor 33 is started. After the rolling roller 2 rotates 90° (if a two-channel heat exchanger is manufactured, it is rotated 180°), the second heat exchange plate is inserted into the adjacent slot 21, and then the third and fourth heat exchange plates are fixed by the same steps after rotating 90°. Finally, the required number of turns is rolled, and the entire roll is fixed as a whole on the end face of the rolled heat exchanger by spot welding. Then the rolling roller 2 can be removed to carry out the step of heat exchanger manufacturing.

[0055] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A plate rolling device for a hollow spiral plate heat exchanger, characterized in that: It includes: frame; A winding roller, the winding roller is rotatably mounted on the frame along an axis in a first direction, a plurality of slots are provided on the circumference of the winding roller, the slots extend along the first direction, the plurality of slots are evenly arranged along the axial direction of the winding roller, and the slots are used for inserting one end of the heat exchange plate; A driving mechanism, disposed on the frame, and connected to the winding roller to drive the winding roller to rotate; as well as A pressing assembly is movably mounted on the frame in a vertical direction and is located above the winding roller. The pressing assembly is used to press the heat exchange plate onto the winding roller or an adjacent heat exchange plate.

2. The plate rolling device for a hollow spiral plate heat exchanger according to claim 1, characterized in that: The winding roller includes a rotating shaft and a plurality of arc-shaped roller plates. The rotating shaft is rotatably mounted on the frame along an axis in a first direction. The plurality of arc-shaped roller plates are arranged at intervals along the circumference of the rotating shaft. Both ends of each of the arc-shaped roller plates are connected to the rotating shaft via a first connecting member, wherein the gap between two adjacent arc-shaped roller plates constitutes the slot.

3. The plate rolling device for a hollow spiral plate heat exchanger according to claim 2, characterized in that: The width of the slot is in the range of 20 mm to 40 mm.

4. The plate rolling device for a hollow spiral plate heat exchanger according to claim 2, characterized in that: The first connecting member is detachably connected to the rotating shaft and the arc-shaped roller plate.

5. The plate rolling device for a hollow spiral plate heat exchanger according to claim 1, characterized in that: The clamping assembly includes a mounting seat, a clamping roller and a driving assembly. The mounting seat is movably mounted on the frame in a vertical direction. The clamping roller is rotatably mounted on the mounting seat along an axis in a first direction. The clamping roller is used to clamp the heat exchange plate onto the winding roller. The driving assembly is connected to the mounting seat to drive the mounting seat to move.

6. The plate rolling device for a hollow spiral plate heat exchanger according to claim 1, characterized in that: The plate rolling device for the hollow spiral plate heat exchanger also includes a limiting component, which is arranged on the frame and spaced apart from the rolling roller along the material conveying direction, and is used to limit the heat exchange plate to limit the movement of the heat exchange plate in the first direction.

7. The plate rolling device for a hollow spiral plate heat exchanger according to claim 6, characterized in that: The limiting assembly includes two limiting rollers, which are arranged at intervals along a first direction, each limiting roller is rotatably mounted on the frame along an axis in a vertical direction, and the area between the two limiting rollers is used for the heat exchange plate to pass through.

8. The plate rolling device for a hollow spiral plate heat exchanger according to claim 7, characterized in that: Each of the limiting rollers is movably arranged along the first direction, so that the distance between the two limiting rollers is adjustable.

9. The plate rolling device for a hollow spiral plate heat exchanger according to claim 8, characterized in that: The frame is provided with an elongated hole, and the elongated hole is extended along a first direction. The end of the limiting roller is provided with a stud, and the stud passes through the elongated hole and is threadedly connected with a nut.

10. The plate rolling device for a hollow spiral plate heat exchanger according to claim 7, characterized in that: The plate rolling device for the hollow spiral plate heat exchanger also includes a conveying roller group. The conveying roller group, the limiting assembly and the rolling roller are arranged at intervals along the material conveying direction. The conveying roller group is used to convey the heat exchange plate.

Images