A double helix conveyor mechanism

Abstract

This application relates to a double-helix conveying mechanism, including a connecting part, a driving part, a housing, and two helical shafts. The connecting part and the driving part are located at opposite axial ends of the housing. Both the shaft and blades of the helical shafts are hollow structures, and the inner cavity of the shaft communicates with the inner cavity of the blades to form a heat exchange chamber. The connecting part includes a first tube and a second tube. The first tube is coaxially fixed to the shaft, and the second tube is sleeved inside the first tube. The second tube and the annular cavity formed by the first and second tubes communicate with the heat exchange chamber. The driving part includes a driving component and a driving shaft. The end of the driving shaft is located inside the shaft and fixed to the inner wall of the shaft by a fixing component, which is a hollow structure. The ends of the driving shaft and the shaft are sealed and fixed circumferentially along the driving shaft. This double-helix conveying mechanism can exchange heat with materials during conveying, achieving heating or cooling of the materials. It also simplifies the overall structure, facilitates spatial arrangement, and ensures the stability of material conveying.

Description

Technical Field

[0001] This application relates to the field of conveying equipment technology, specifically to a double-helix conveying mechanism. Background Technology

[0002] A screw conveyor is a device that uses the rotation of a screw shaft to move materials through helical blades, thereby achieving material transport. Due to its good material transport stability, the screw conveyor has a wide range of applications.

[0003] In some applicable situations, it is necessary to heat or cool the materials during the material conveying process. Therefore, the screw conveyor mechanism needs to be integrated with heating or cooling functions. How to simplify the overall structure, facilitate spatial arrangement, and ensure the stability of material conveying is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this application is to provide a double-helix conveying mechanism that can exchange heat with materials during the conveying process, thereby heating or cooling the materials, and can also simplify the overall structure, facilitate spatial arrangement, and ensure the stability of material conveying.

[0005] To solve the above-mentioned technical problems, this application provides a double-helix conveying mechanism, including a connecting part, a driving part, a housing, and two parallel helical shafts disposed within the housing. The housing has an inlet and an outlet at its axial ends, respectively. The connecting part and the driving part are located at the axial ends of the housing. Each helical shaft is rotatably disposed within the housing and includes a rotating shaft and blades. The blades extend helically along the axial direction of the rotating shaft, and the blades of the two helical shafts are staggered. Both the rotating shaft and the blades are hollow structures, and the inner cavity of the rotating shaft communicates with the inner cavity of the blades to form a heat exchange chamber. One end of the connecting part extends into the housing, and the other... One end is located outside the housing. The connecting part includes a first tube and a second tube. The first tube is coaxially fixed with the rotating shaft. The second tube is sleeved inside the first tube. The first tube and the second tube form an annular cavity. The annular cavity and the second tube are respectively connected to the heat exchange cavity and form the inlet channel and outlet channel of the heat exchange cavity. The driving part includes a driving member and a driving shaft connected by a drive. The end of the driving shaft is located inside the rotating shaft, and the end of the driving shaft is fixed to the inner wall of the rotating shaft by a fixing member. The fixing member has a hollow structure. The end of the driving shaft and the rotating shaft are sealed and fixed along the circumference of the driving shaft.

[0006] This double-helix conveyor mechanism can exchange heat with the material through a heat exchange medium during the material conveying process, which can effectively increase or decrease the temperature of the material, so as to facilitate the heating or cooling of the material. This reduces the capacity requirements of subsequent equipment for heating or cooling the material, and may even eliminate the need for other heat exchange equipment. As a result, it simplifies the overall structure of the system, reduces costs and space requirements, and is economical.

[0007] One end of the drive shaft is located inside the rotating shaft. The end of the drive shaft is fixed to the inner wall of the rotating shaft by a fastener. This fastener has a hollow structure to facilitate the passage of the heat exchange medium and avoid obstructing the heat exchange medium inside the rotating shaft cavity, thereby ensuring the heat exchange effect. Furthermore, the ends of the drive shaft and the rotating shaft are also sealed and fixed along the circumference of the drive shaft.

[0008] In other words, one end of the drive shaft extends into the rotating shaft, and the drive shaft is fixed at both the end of the rotating shaft and the fixing part to ensure the stability of the fixing between the rotating shaft and the drive shaft, thereby ensuring the stability of the drive unit driving the rotating shaft to rotate through the drive shaft.

[0009] The drive unit and the connecting part are located on the axial sides of the shell, respectively. The heat exchange medium enters and exits the heat exchange chamber through the connecting part. The entry and exit of the heat exchange medium are both located on the same axial side of the double helix conveying mechanism, which can avoid interference between the medium pipeline and the drive unit, facilitate on-site layout, and reduce the requirements for installation space.

[0010] Furthermore, by placing both the inlet and outlet channels on the same axial side of the shell, compared to placing them at opposite ends of the shell, it is easier for external equipment to heat or cool the heat exchange medium. For example, when heating materials with the heat exchange medium, a heating device can be installed outside the shell. The low-temperature medium discharged from the outlet channel, after being heated by the heating device, re-enters the heat exchange chamber through the inlet channel to reheat the material. The inlet and outlet channels are connected to the heating device via medium pipelines. Placing both the inlet and outlet channels on the same axial end of the shell facilitates the arrangement of the heating device and medium pipelines, thereby simplifying the overall structure.

[0011] Optionally, the drive unit further includes a transmission assembly, through which the drive member drives the two drive shafts to rotate, and the two drive shafts rotate in opposite directions.

[0012] Optionally, the transmission assembly includes two meshing synchronous gears, which are coaxially fixed to the two drive shafts respectively, and the drive component includes a motor that is drivenly connected to one of the drive shafts.

[0013] Optionally, the housing may also have a cavity forming a second heat exchange channel.

[0014] Optionally, it also includes a rotary joint, which includes an outer tube and an inner tube, the outer tube being coaxially connected to the first tube section, and the inner tube being coaxially connected to the second tube section.

[0015] Optionally, the annular cavity is connected to the inner cavity of the blade, and the inner cavity of the second tube is connected to the inner cavity of the rotating shaft; the side wall of the rotating shaft away from the connecting part is also provided with a first communication port, and the inner cavity of the blade and the inner cavity of the rotating shaft are connected through the first communication port.

[0016] Optionally, the rotating shaft is further provided with a partition plate, which divides the inner cavity of the rotating shaft into a first cavity and a second cavity arranged along the axial direction. The first cavity is located on the side facing the connecting part and is connected to the inner cavity of the annular cavity and the blade, respectively. The second cavity is connected to the second tube.

[0017] Optionally, the partition is fixed to the inner wall of the rotating shaft, and the partition is also fixed to the end of the first tube. The side wall of the first tube is provided with a second communication port, which communicates with the first cavity.

[0018] Optionally, the spiral shaft further includes multiple connecting pipes, each of which is spaced apart within the rotating shaft. One end of each connecting pipe communicates with the inner cavity of the blade, and the other end of each connecting pipe is disposed towards the inner side of the inner cavity of the rotating shaft. The inner cavity of the blade is also provided with a guide structure, which is used to guide the liquid inside the blade to be discharged from the connecting pipe into the inner cavity of the rotating shaft. The end of the second pipe located within the rotating shaft is also provided with a bent portion, which is disposed towards the bottom of the rotating shaft.

[0019] Optionally, it also includes a bracket, which is fixed relative to the housing, and a bearing is provided between the first tube and the bracket. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a double-helix conveying mechanism provided in an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the internal structure of a double-helix conveyor mechanism;

[0022] Figure 3 This is a partial cross-sectional view of the double-helix conveying mechanism when the heat exchange medium is liquid;

[0023] Figure 4 This is a partial cross-sectional view of the double-helix conveying mechanism when the heat exchange medium is gas;

[0024] Figure 5This is a cross-sectional view of the double-helix conveying mechanism when the connecting pipe is rotated to a downward tilt.

[0025] Figure 6 This is a cross-sectional view of the double-helix conveying mechanism when the connecting pipe is rotated to an upward tilt.

[0026] Figure 7 This is a partial sectional view of the double-helix conveyor mechanism.

[0027] Appendix Figures 1-7 The reference numerals in the attached figures are explained as follows:

[0028] 1. Housing; 11. Medium inlet; 12. Medium outlet; 2. Spiral shaft; 21. Rotating shaft; 211. First connecting port; 212. Second connecting port; 213. First cavity; 214. Second cavity; 22. Blade; 221. Guide structure; 23. Partition; 24. Connecting pipe; 25. Fixing element; 3. Connecting part; 31. First pipe part; 311. First flange; 32. Second pipe part; 321. Bending part; 33. Annular cavity; 4. Rotary joint; 41. Outer pipe; 411. Second flange; 42. Inner pipe; 5. Drive part; 51. Drive shaft; 52. Drive element; 53. Transmission assembly; 6. Support; 7. Bearing; 8. Medium pipeline. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] This application provides a double-helix conveying mechanism, such as... Figure 1 and Figure 2 As shown, the double-helix conveying mechanism includes a housing 1 and two parallel helical shafts 2 disposed within the housing 1. The helical shafts 2 are rotatably disposed within the housing 1. Each helical shaft 2 includes a rotating shaft 21 and blades 22. The blades 22 extend helically along the axial direction of the rotating shaft 21. The blades 22 of the two helical shafts 2 are arranged alternately. One end of the housing 1 is provided with a feed inlet, and the other end of the housing 1 is provided with a discharge outlet. Material can enter the housing 1 through the feed inlet. The two helical shafts 2 rotate in opposite directions and can transport the material entering the housing 1 through the feed inlet to the discharge outlet side, so that the material is discharged from the discharge outlet, thereby realizing the conveying of material from the feed inlet to the discharge outlet side.

[0031] Both the shaft 21 and the blade 22 are hollow structures, and the inner cavity of the shaft 21 is connected to the inner cavity of the blade 22 to form a heat exchange chamber. For example... Figure 3As shown, the double helix conveying mechanism also includes a connecting part 3. One end of the connecting part 3 extends into the housing 1, and the other end of the connecting part 3 is located outside the housing 1. The connecting part 3 includes a first tube part 31 and a second tube part 32 that are sleeved on each other. The first tube part 31 is sleeved on the outside of the second tube part 32. The first tube part 31 is coaxially fixed with the rotating shaft 21. The second tube part 32 is located inside the first tube part 31, and one end of the second tube part 32 extends into the inner cavity of the rotating shaft 21. The first tube part 31 and the second tube part 32 form an annular cavity 33. The inner cavities of the annular cavity 33 and the second tube part 32 are respectively connected to the heat exchange cavity, thereby forming a first heat exchange channel. In the inner cavities of the annular cavity 33 and the second tube part 32, one forms an inlet channel for the heat exchange medium, and the other forms an outlet channel for the heat exchange medium.

[0032] The heat exchange medium can enter through the inlet channel, and after exchanging heat with the material in the shell 1 through the heat exchange chamber (which includes the inner cavity of the rotating shaft 21 and the inner cavity of the blade 22), it can be discharged through the outlet channel, thus enabling the double helix conveying mechanism to have heat exchange performance.

[0033] In other words, the double-helix conveying mechanism provided in this embodiment can exchange heat with the material through a heat exchange medium during the material conveying process, which can effectively increase or decrease the temperature of the material, so as to facilitate the heating or cooling of the material. This reduces the capacity requirements of subsequent equipment for heating or cooling the material, and may even eliminate the need for other heat exchange equipment, thereby simplifying the overall structure of the system, reducing costs and space requirements, and achieving good economic efficiency.

[0034] The double helix conveying mechanism also includes a drive unit 5, which includes a drive shaft 51 and a drive component 52. The drive shaft 51 is connected to the rotating shaft 21 and the two can rotate synchronously. The drive component 52 is used to drive the drive shaft 51 to rotate and drive the rotating shaft 21 to rotate, so as to realize the conveying of materials.

[0035] like Figure 3 As shown, one end of the drive shaft 51 is located inside the rotating shaft 21. The end of the drive shaft 51 is fixed to the inner wall of the rotating shaft 21 by a fixing member 25. The fixing member 25 has a hollow structure to facilitate the passage of the heat exchange medium and avoid obstructing the heat exchange medium inside the rotating shaft 21, thereby ensuring the heat exchange effect. Furthermore, the ends of the drive shaft 51 and the rotating shaft 21 are also sealed and fixed along the circumference of the drive shaft 51.

[0036] In other words, one end of the drive shaft 51 extends into the rotating shaft 21, and the drive shaft 51 is fixed at the end of the rotating shaft 21 and at the fixing member 25, respectively, to ensure the stability of the fixing between the rotating shaft 21 and the drive shaft 51, thereby ensuring the stability of the drive unit 5 driving the rotating shaft 21 to rotate through the drive shaft 51.

[0037] The drive unit 5 also includes a transmission assembly 53. The drive member 52 can simultaneously drive two drive shafts 51 to rotate via the transmission assembly 53, and the two drive shafts 51 rotate in opposite directions. Of course, the transmission assembly 53 can also be omitted, and the two drive members 52 can drive the two drive shafts 51 to rotate separately. However, by setting the transmission assembly 53, one drive member 52 can synchronously drive the two drive shafts 51 to rotate, which provides good synchronization and can further simplify the overall structure and reduce costs.

[0038] The transmission assembly 53 may include two meshing synchronous gears, which are coaxially fixed to two drive shafts 51 respectively. The drive component 52 includes a motor that is driveably connected to one of the drive shafts 51. Of course, in this embodiment, the specific structure of the transmission assembly 53 is not limited. For example, the transmission assembly 53 may be configured to include a drive shaft, a drive gear, and two driven gears. The motor is driveably connected to the drive shaft, the drive gear is coaxially fixed to the drive shaft, and the two driven gears are coaxially fixed to the two drive shafts respectively. One driven gear directly meshes with the drive gear, and an intermediate gear is provided between the other driven gear and the drive gear to achieve opposite rotation directions of the two drive shafts.

[0039] By configuring the transmission assembly 53 to include two directly meshing synchronous gears, the overall structure can be simplified and spatial arrangement can be facilitated. The drive component 52 may also include components such as a reducer.

[0040] The drive unit 5 and the connecting unit 3 are located on the axial sides of the housing 1, respectively. The heat exchange medium enters and exits the heat exchange chamber through the connecting unit 3. In other words, the entry and exit of the heat exchange medium are both located on the same axial side of the double helix conveying mechanism, which can avoid interference between the medium pipeline and the drive unit 5, facilitate on-site layout, and reduce the requirements for installation space.

[0041] Furthermore, by placing both the inlet and outlet channels on the same axial side of the shell 1, compared to placing them at opposite ends of the shell 1, it is easier for external equipment to heat or cool the heat exchange medium. For example, when heating materials through the heat exchange medium, a heating device can be installed outside the shell 1. The low-temperature medium discharged from the outlet channel, after being heated by the heating device, re-enters the heat exchange chamber through the inlet channel to reheat the material. The inlet and outlet channels are connected to the heating device through the medium pipeline 8. Placing both the inlet and outlet channels on the same axial end of the shell 1 facilitates the arrangement of the heating device and the medium pipeline 8, thereby simplifying the overall structure.

[0042] The first tube 31 is fixed coaxially with the rotating shaft 21 and rotates synchronously with the rotating shaft 21. The second tube 32 is sleeved inside the first tube 31. A gap is left between the second tube 32 and the first tube 31 to form an annular cavity 33. The second tube 32 does not need to rotate to simplify the external communication structure.

[0043] In this embodiment, there are no restrictions on the heat exchange medium; it can be water, oil, steam, etc. Furthermore, the heat exchange with the material can be achieved by heating or cooling the material through the heat exchange medium, depending on the actual situation.

[0044] like Figure 3 As shown, when the heat exchange medium is a liquid medium such as water or oil, the annular cavity 33 formed by the first tube section 31 and the second tube section 32 is connected to the inner cavity of the blade 22, and the inner cavity of the second tube section 32 is connected to the inner cavity of the rotating shaft 21.

[0045] Taking the annular cavity 33 forming an inlet channel and the inner cavity of the second tube 32 forming an outlet channel as an example, after the heat exchange medium enters the inner cavity of the blade 22 through the inlet channel, it flows along the inner cavity of the blade 22 to the inner cavity of the rotating shaft 21, and finally flows out through the outlet channel.

[0046] Of course, in this embodiment, the inner cavity of the second tube 32 can be connected to the inner cavity of the blade 22, and the annular cavity 33 can be connected to the inner cavity of the rotating shaft 21. However, connecting the inner cavity of the second tube 32 sleeved on the inner side to the inner cavity of the rotating shaft 21, and connecting the outer annular cavity 33 to the inner cavity of the blade 22, makes the overall structure arrangement more convenient.

[0047] A first connecting port 211 is provided on the side wall of the rotating shaft 21 away from the connecting part 3. The inner cavity of the blade 22 and the inner cavity of the rotating shaft 21 are connected through the first connecting port 211. After the heat exchange medium enters the inner cavity of the blade 22, it flows spirally along the inner cavity of the blade 22 to the side away from the connecting part 3, and then enters the inner cavity of the rotating shaft 21 through the first connecting port 211. After flowing to the side of the rotating shaft 21 facing the connecting part, it is discharged from the second pipe 32. This arrangement ensures that the heat exchange medium can completely pass through the inner cavity of the blade 22 and the inner cavity of the rotating shaft 21, ensuring the overall heat exchange effect in the axial direction of the double spiral conveying mechanism.

[0048] The number of first communication ports 211 provided on the wall of the rotating shaft 21 is not limited. It can be one, two or more, depending on the actual situation. Each first communication port 211 can be arranged along the radial direction and / or circumferential direction of the rotating shaft 21.

[0049] Of course, in this embodiment, the first communication port 211 can also be provided at other positions of the rotating shaft 21, such as the first communication port 211 being provided at the middle position in the axial direction of the rotating shaft 21. When the first communication port 211 is provided on the side away from the communication part, it can ensure that the heat exchange medium can flow through each position of the first heat exchange channel and ensure the heat exchange effect.

[0050] like Figure 3 As shown, a partition 23 is also provided inside the rotating shaft 21. The partition 23 can divide the inner cavity of the rotating shaft 21 into a first cavity 213 and a second cavity 214. The first cavity 213 is provided on the side facing the connecting part 3. The first cavity 213 is connected to the inner cavity of the blade 22 and the annular cavity 33. The second cavity 214 is connected to the inner cavity of the second tube part 32.

[0051] Alternatively, in this embodiment, the annular cavity 33 can be connected to the inner cavity of the blade 22 through a connecting pipe. By setting a partition 23 to form a first cavity 213 and a second cavity 214, and by using the first cavity 213 to achieve the connection between the annular cavity 33 and the inner cavity of the blade 22, the overall structure can be simplified and the connection stability can be improved.

[0052] The partition 23 is fixed to the inner wall of the rotating shaft 21. The specific fixing method is not limited, such as interference fit. The partition 23 is also fixed to the end of the first tube 31. The side wall of the first tube 31 is provided with a second communication port 212, which communicates with the first cavity 213. The heat exchange medium flows sequentially through the annular cavity 33, the second communication port 212, the first cavity 213, the first communication port 211, the inner cavity of the blade 22, the second cavity 214, and the second tube 32.

[0053] Of course, in this embodiment, there may also be a gap between the end of the first tube 31 and the partition 23, so that the medium in the annular cavity 33 can enter the first cavity 213 from the end of the first tube 31. When the end of the first tube 31 is fixed to the partition 23, the end of the first tube 31 is fixed to the rotating shaft 21. At the same time, the first tube 31 is also fixed to the rotating shaft 21 through the partition 23, so as to ensure the stability of the fixation between the first tube 31 and the rotating shaft 21.

[0054] The end of the second tube 32 can extend out of the partition 23, or it can be aligned with the partition 23. The second tube 32 and the partition 23 can be fitted with a small gap to ensure relative rotation between them.

[0055] like Figure 4As shown, when the heat exchange medium is a liquid medium such as high-temperature steam, the two medium channels are respectively connected to the inner cavity of the rotating shaft 21. That is, the annular cavity 33 and the second tube section 32 are both connected to the inner cavity of the rotating shaft 21. Multiple connecting pipes 24 are also spaced apart on the side wall of the rotating shaft 21. One end of each connecting pipe 24 is connected to the inner cavity of the blade 22, and the other end of the connecting pipe 24 is positioned towards the inner side of the inner cavity of the rotating shaft 21. This can be as follows: Figure 4 As shown, the connecting pipe 24 is arranged approximately in the radial direction of the rotating shaft 21, and the second pipe section 32 is provided with a bent section 321 at one end inside the rotating shaft 21, which is arranged towards the bottom of the rotating shaft 21.

[0056] The second tube 32 does not rotate with the shaft 21. The bent portion 321 of the second tube 32 is positioned facing the bottom of the shaft 21. The bottom of the shaft 21 refers to the side of the shaft 21 facing downwards when it is in the installed state.

[0057] After the high-temperature steam enters the heat exchange chamber along the annular cavity 33, it can enter the inner cavity of the blade 22 through the connecting pipe 24 from the inner cavity of the rotating shaft 21 and fill the entire heat exchange chamber. After the high-temperature steam exchanges heat with the external material in the heat exchange chamber, the temperature decreases and some of the steam condenses to form water droplets.

[0058] The inner cavity of the blade 22 is also provided with a guide structure 221. The guide structure 221 can be a guide plate or a guide groove, etc. The guide structure 221 is used to guide the water droplets in the inner cavity of the blade 22 to the connecting pipe 24. When the blade 22 rotates to the end of the connecting pipe 24 (the end facing the inside of the rotating shaft 21) and tilts downward, the water in the blade 22 will flow along the connecting pipe 24 to the rotating shaft 21. Under the action of gravity, the water in the rotating shaft 21 falls to the bottom. When the water accumulates to a certain amount, it can submerge the end of the second pipe section 32. As high-temperature steam continues to enter, the pressure in the heat exchange chamber increases, and the water is discharged from the second pipe section 32.

[0059] The specific shape and structure of the guide structure 221 are not limited. For example, the guide structure 221 can be set as a water-blocking groove arranged inside the blade 22 along the outer periphery of the rotating shaft 21. The water-blocking groove is located close to the connecting pipe 24, and the groove opening faces the connecting pipe 24. The connecting pipe 24 is located on the side of the water-blocking groove facing the rotation direction of the rotating shaft 24, so that... Figure 5 and Figure 6 As shown, when the water-blocking trough is in the low position, it can store water as the rotating shaft 21 rotates. When the water-blocking trough rotates to the high position, it can discharge the internal water into the rotating shaft 21 through the inclined connecting pipe 24. Alternatively, the guide structure can be set as a baffle. As the rotating shaft rotates, the baffle can carry at least part of the water to the high position and discharge the water into the rotating shaft 21 through the inclined connecting pipe 24.

[0060] Of course, in this embodiment, the inner cavity of the rotating shaft 21 and the inner cavity of the blade 22 can also be set to be completely connected, that is, the rotating shaft 21 and the blade 22 are not separated by the side wall of the rotating shaft 21, and the wall surface of the inner cavity of the spiral shaft 2 conforms to the outer wall surface of the spiral shaft 2. In this case, the annular cavity 33 can be connected to the end of the inner cavity of the spiral shaft 2 facing the connecting part 3, and the second tube 32 can be extended to the side end of the inner cavity of the spiral shaft 2 away from the connecting part 3.

[0061] Separating the inner cavity of the blade 22 from the inner cavity of the rotating shaft 21 ensures the overall structural strength of the spiral shaft 2 and simplifies the molding process.

[0062] like Figure 7 As shown, the double-helix conveying mechanism also includes a rotary joint 4, which is located outside the housing 1 and connected to the connecting part 3. The rotary joint 4 can be a conventional rotary joint 4, the structure of which is well known to those skilled in the art and will not be described in detail here for the sake of brevity. The rotary joint 4 includes an outer tube 41 and an inner tube 42, wherein the outer tube 41 and the inner tube 42 can rotate relative to each other. The outer tube 41 is coaxially fixed and connected to the first tube part 31, and the outer tube 41 can rotate together with the first tube part 31 and the helical shaft 2. The inner tube 42 is coaxially fixed and connected to the second tube part 32, or the inner tube 42 and the second tube part 32 can be integrally formed.

[0063] Of the outer pipe 41 and the inner pipe 42, one forms an inlet pipe and the other forms an outlet pipe. The outer pipe 41 and the inner pipe 42 are respectively connected to external heating or cooling equipment. The rotary joint 4 is provided to facilitate connection with external equipment.

[0064] The method of fixing the outer tube 41 and the first tube section 31 is not limited, such as... Figure 7 As shown, the outer tube 41 is provided with a first flange 311, and the first tube section 31 is provided with a second flange 411. The first flange 311 and the second flange 411 are fixed by bolts, which provides good stability and facilitates installation and operation, reducing the structural requirements of the outer tube 41. Of course, the outer tube 41 and the first tube section 31 can also be made into an integral structure.

[0065] Of course, in this embodiment, the rotary joint 4 may not be provided. Instead, a connecting part is provided, which has a connecting cavity. The end of the first tube 31 away from the rotating shaft 21 extends into the connecting cavity and communicates with it. The first tube 31 can rotate relative to the connecting part, while the connecting part does not rotate with the rotating shaft 21. The connecting part can be connected to external equipment through a flexible hose.

[0066] The double helix conveying mechanism also includes a bracket 6, which is fixed to the side of the housing 1 facing the connecting part 3. A bearing 7 is also provided between the first tube 31 of the connecting part 3 and the bracket 6. The bracket 6 provides support to the connecting part 3, thereby providing support to the side of the rotating shaft 21 facing the connecting part 3 and ensuring support stability.

[0067] A bracket 6 may also be provided on the side of the housing 1 facing the drive unit 5. A bearing 7 is provided between the bracket 6 and the drive shaft 51 to ensure the rotational stability of the drive shaft 51.

[0068] In this embodiment, the sidewall of the shell 1 is also provided with a cavity, and a second heat exchange channel is formed through the cavity. The wall of the shell 1 can be provided with a serpentine arrangement of cavities, or the inner wall of the shell 1 can be an entire cavity structure. The first heat exchange channel and the second heat exchange channel can be arranged in series, or the first heat exchange channel and the second heat exchange channel can be arranged in parallel and connected to the first heating part through the medium pipeline 8 respectively; or two external devices can be respectively connected to the first heat exchange channel and the second heat exchange channel.

[0069] The second heat exchange channel on the side wall of the shell 1 can be arranged on a local side wall of the shell 1, or all side walls of the shell 1 can be provided with cavities. The specific arrangement can be determined according to the structure of the shell 1 and the connection and placement of the shell 1 with other external components, etc., and no specific restrictions are imposed here.

[0070] like Figure 1 and Figure 2 As shown, the shell 1 is provided with a medium inlet 11 and a medium outlet 12. The medium inlet 11 is located above the side wall of the shell 1, and the medium outlet 12 is located on the bottom wall of the shell 1. Due to structural limitations, the top of the shell 1 is not provided with a second heat exchange channel. The two sides of the shell 1 are respectively provided with medium inlets 11. The heat exchange medium enters the second heat exchange channel through the medium inlet 11 and exchanges heat with the material in the shell 1. After that, it is discharged through the medium outlet 12. It can be re-entered into the second heat exchange channel through the medium inlet 11 after being heated by the first heating part to participate in heat exchange again.

[0071] Of course, the medium inlet 11 can also be located on the bottom wall of the housing 1, and the medium outlet 12 can be located on the upper side wall of the housing 1. No specific restrictions are made here.

[0072] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0073] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0074] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A double helix conveying mechanism characterized by, It includes a connecting part (3), a driving part (5), a housing (1) and two parallel spiral shafts (2) disposed in the housing (1). The housing (1) has an inlet and an outlet at its two axial ends, respectively. The connecting part (3) and the driving part (5) are located at the two axial ends of the housing (1). The spiral shaft (2) is rotatably disposed inside the housing (1). The spiral shaft (2) includes a rotating shaft (21) and blades (22). The blades (22) extend spirally along the axial direction of the rotating shaft (21). The blades (22) of the two spiral shafts (2) are arranged alternately. Both the rotating shaft (21) and the blades (22) are hollow structures. The inner cavity of the rotating shaft (21) is connected to the inner cavity of the blades (22) to form a heat exchange cavity. One end of the connecting part (3) extends into the housing (1), and the other end is located outside the housing (1). The connecting part (3) includes a first tube part (31) and a second tube part (32). The first tube part (31) is coaxially fixed with the rotating shaft (21). The second tube part (32) is sleeved inside the first tube part (31). The first tube part (31) and the second tube part (32) form an annular cavity (33). The annular cavity (33) and the second tube part (32) are respectively connected to the heat exchange cavity and respectively form the inlet channel and outlet channel of the heat exchange cavity. The drive unit (5) includes a drive member (52) and a drive shaft (51) connected by a drive. The end of the drive shaft (51) is located inside the rotating shaft (21), and the end of the drive shaft (51) is fixed to the inner wall of the rotating shaft by a fixing member. The fixing member has a hollow structure, and the ends of the drive shaft and the rotating shaft are sealed and fixed along the circumference of the drive shaft.

2. The double helix conveyor mechanism of claim 1, wherein, The drive unit (5) further includes a transmission assembly (53), through which the drive member (52) drives the two drive shafts (51) to rotate, and the two drive shafts (51) rotate in opposite directions.

3. The double helix conveyor mechanism of claim 2, wherein, The transmission assembly (53) includes two meshing synchronous gears, which are coaxially fixed to the two drive shafts (51) respectively. The drive component (52) includes a motor that is connected to one of the drive shafts (51).

4. Twin-screw conveying mechanism according to any one of claims 1-3, characterized in that The shell (1) also has a cavity and forms a second heat exchange channel.

5. The double helix conveyor mechanism of any of claims 1-3, wherein, It also includes a rotary joint (4), which includes an outer tube (41) and an inner tube (42). The outer tube (41) is coaxially connected to the first tube section (31), and the inner tube (42) is coaxially connected to the second tube section (32).

6. The double helix conveyor mechanism of any of claims 1-3, wherein, The annular cavity (33) is connected to the inner cavity of the blade (22), and the inner cavity of the second tube (32) is connected to the inner cavity of the rotating shaft (21); The rotating shaft (21) is provided with a first communication port (211) on the side wall away from the connecting part (3), and the inner cavity of the blade (22) is connected to the inner cavity of the rotating shaft (21) through the first communication port (211).

7. The double helix conveyor mechanism of claim 6, wherein, The rotating shaft (21) is also provided with a partition (23), which divides the inner cavity of the rotating shaft (21) into a first cavity (213) and a second cavity (214) arranged along the axial direction. The first cavity (213) is located on the side facing the connecting part (3), and the first cavity (213) is connected to the inner cavity of the annular cavity (33) and the blade (22) respectively. The second cavity (214) is connected to the second tube part (32).

8. The double helix conveyor mechanism of claim 7, wherein, The partition (23) is fixed to the inner wall of the rotating shaft (21), and the partition (23) is also fixed to the end of the first tube (31). The side wall of the first tube (31) is provided with a second communication port (212), and the second communication port (212) communicates with the first cavity (213).

9. The double helix conveyor mechanism of any of claims 1-3, wherein, The spiral shaft (2) also includes multiple connecting pipes (24), each of which is spaced apart inside the rotating shaft (21). One end of each connecting pipe (24) is connected to the inner cavity of the blade (22), and the other end of each connecting pipe (24) is disposed inside the inner cavity of the rotating shaft (21). The inner cavity of the blade (22) is also provided with a guide structure (221), which is used to guide the liquid in the blade (22) to be discharged from the connecting pipe (24) to the inner cavity of the rotating shaft (21). The second tube (32) is also provided with a bent part (321) at one end inside the rotating shaft (21), which is disposed towards the bottom of the rotating shaft (21).

10. The double helix conveyor mechanism of any of claims 1-3, wherein, It also includes a bracket (6), which is fixed relative to the housing (1), and a bearing (7) is provided between the first tube (31) and the bracket (6).

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