Screw conveyor shaft and water cooled screw conveyor

Abstract

The utility model discloses a spiral conveying shaft and water -cooling spiral conveyer for spiral conveying equipment technical field. This spiral conveying shaft includes the shaft body, spiral blade and shunt piece, is equipped with the water passage in the shaft body, and the axial both ends of shaft body are equipped with the shaft water inlet for water flow to enter and the shaft water outlet for water flow to leave with the intercommunication of water passage, spiral blade is fixed in the shaft body outside, is equipped with spiral channel in spiral blade, and both ends of spiral channel all are interconnected with water passage, shunt piece is installed in water passage, and along the diameter direction of shaft body, the projection of shunt piece is located in the projection of spiral channel, shunt piece is equipped with overflow channel, and the through -going axis of overflow channel is arranged along the axial direction of water passage, and shunt piece is used for limiting the flow of water in water passage to make water can be shunted to spiral channel. The water flow in this spiral conveying shaft is good in the flowability in water passage and spiral channel, and reduces the temperature dead zone situation of spiral blade.

Description

Technical Field

[0001] This utility model relates to the field of screw conveyor technology, and in particular to a screw conveyor shaft and a water-cooled screw conveyor. Background Technology

[0002] Water-cooled screw conveyors are specialized equipment designed for conveying high-temperature materials. Their core function lies in achieving continuous material conveying and simultaneous cooling through an integrated cooling system. Currently, water-cooled screw conveyors primarily employ two cooling methods: water cooling of the screw's central shaft and water cooling of the conveyor shell layer. Both designs utilize circulating cooling water to remove heat, effectively reducing the overall temperature of the equipment, thereby extending the conveyor's service life and improving the stability of high-temperature material conveying.

[0003] While traditional water-cooling technology can cool the central shaft and casing, it suffers from a critical flaw: the helical blades themselves lack direct cooling. To address this, existing technology has disclosed a water-cooled helical conveyor with a connector at one end of the central shaft, featuring an inlet and outlet. The central shaft has a water passage, and the blades are hollow and connected to this passage. Water enters the passage through the connector and circulates before exiting. However, this design has a fatal flaw: a temperature dead zone easily forms in the blades. Firstly, water from the connector directly enters the water passage, flowing mostly within it, while the water flow within the helical blades is slow or even stagnant, failing to effectively remove heat and creating a temperature dead zone. Secondly, the water enters and exits from the same end; cold water entering comes into contact with returning hot water, causing the water temperature to rise. By the time the water reaches the blade tip, its temperature is already close to the material temperature, significantly reducing cooling efficiency and resulting in a higher temperature at the blade tip, creating another temperature dead zone. Utility Model Content

[0004] This invention provides a spiral conveyor shaft and a water-cooled spiral conveyor, aiming to solve the problem of temperature dead zone in the cooling of spiral blades in the prior art.

[0005] The first aspect of this utility model provides a spiral conveyor shaft, comprising:

[0006] The shaft body has a water passage inside, and the shaft body has a shaft inlet for water to flow in and a shaft outlet for water to flow out at both axial ends, which are connected to the water passage.

[0007] A helical blade is fixed to the shaft body, and a helical channel is provided inside the helical blade, with both ends of the helical channel communicating with the water passage.

[0008] The diverting block is installed inside the water passage, and its projection is located within the projection of the spiral channel along the diameter direction of the shaft body. The diverting block is provided with a flow passage, and the through axis of the flow passage is arranged along the axial direction of the water passage. The diverting block is used to limit the flow rate of water in the water passage so that the water can be diverted to the spiral channel.

[0009] In some embodiments of the first aspect, along the diametrical direction of the shaft body, the distance between the projection of the diverter block and the projection of the shaft inlet is greater than the distance between the projection of the diverter block and the projection of the shaft outlet.

[0010] In some embodiments of the first aspect, the diversion block is provided with a water passage hole, which is the flow channel;

[0011] And / or, the edge of the diverter block is provided with a notch, and the notch forms the flow channel between the inner wall of the shaft body.

[0012] In some embodiments of the first aspect, the shaft body includes an inlet pipe having the shaft inlet, a hollow shaft tube, and an outlet pipe having the shaft outlet;

[0013] Along the axial direction of the shaft body, the water inlet pipe, the hollow shaft tube, and the water outlet pipe are connected in sequence.

[0014] The diameter of the inlet pipe is smaller than the diameter of the outlet pipe.

[0015] In some embodiments of the first aspect, the outer wall of the shaft body is provided with blade water inlet holes and blade water outlet holes;

[0016] The two ends of the spiral channel are connected to the water passage through the blade inlet and the blade outlet, respectively.

[0017] The diameter of the water inlet hole of the blade is smaller than the diameter of the water outlet hole of the blade.

[0018] In some embodiments of the first aspect, the spiral conveying shaft further includes a counter-spiral blade, the counter-spiral blade being fixed to the shaft body, the pushing direction of the counter-spiral blade being opposite to that of the spiral blade.

[0019] The second aspect of this utility model provides a water-cooled screw conveyor, comprising:

[0020] The outer casing has a propulsion chamber, and the outer casing has an inlet for material to enter and an outlet for material to leave, which are connected to the propulsion chamber.

[0021] The spiral conveyor shaft described in the first aspect has one end located outside the housing, and the other end passing through the propulsion cavity and located outside the housing;

[0022] A drive mechanism is connected to the screw conveyor shaft via a transmission connection.

[0023] In some embodiments of the second aspect, the housing further includes an annular heat-insulating cavity;

[0024] Along the axial direction of the spiral conveyor shaft, the annular heat insulation cavity is located within the peripheral sidewall of the outer shell.

[0025] In some embodiments of the second aspect, the outer shell is further provided with a shell inlet and a shell outlet, both of which are connected to the annular heat insulation cavity.

[0026] In some embodiments of the second aspect, the cross-section of the housing is circular along a plane perpendicular to the axis of the spiral conveyor shaft.

[0027] As can be seen from the above technical solutions, this utility model has the following advantages:

[0028] This embodiment provides a spiral conveyor shaft and a water-cooled spiral conveyor, including a shaft body, spiral blades, and a flow divider block. The shaft body has a shaft inlet for water flow at both axial ends and a shaft outlet for water flow exit. A water passage is provided within the shaft body, and a spiral channel communicating with the water passage is provided within the spiral blades. Furthermore, the projection of the flow divider block lies within the projection of the spiral channel along the height direction of the water passage. The flow divider block has a flow channel, and the through-axis of the flow channel is arranged along the axial direction of the water passage. Therefore, when water enters the water passage and reaches the flow divider block, the water flow is diverted. The block's obstruction and guidance cause some water to continue flowing along the water channel axis through the flow passage on the diverting block, while the other part of the water changes its flow direction due to the obstruction of the diverting block and is diverted into the spiral channel through the water inlet holes of the blades, ensuring sufficient water flow in the spiral channel. Therefore, after the water enters the spiral conveyor shaft from one end, it will flow in the water passage and the spiral channel respectively and finally flow out of the spiral conveyor shaft from the other end. The good fluidity of the water in the water passage and the spiral channel can absorb the heat of the spiral blades and the shaft body, reduce the existence of temperature dead zones in the spiral blades and the shaft body, and improve the cooling effect. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A schematic cross-sectional view of the complete structure of a spiral conveyor shaft provided in the first aspect of the present invention;

[0031] Figure 2 A partially enlarged cross-sectional view of the blade water inlet hole provided in the first aspect of the present utility model;

[0032] Figure 3 A partially enlarged cross-sectional view of the blade water outlet hole provided in the first aspect of the present utility model;

[0033] Figure 4 This is a schematic cross-sectional view of a water-cooled screw conveyor provided as a second aspect of the present invention.

[0034] Figure label:

[0035] Screw conveyor shaft 1;

[0036] Shaft body 10; water passage 100; shaft inlet 101; shaft outlet 102; inlet pipe 103; hollow shaft tube 104; outlet pipe 105; blade inlet hole 106; blade outlet hole 107; spiral blade 11; spiral channel 110; flow divider 12; flow passage 120; anti-spiral blade 13;

[0037] 2. Outer shell; 20. Inlet; 21. Outlet; 22. Annular heat insulation cavity; 23. Water inlet of shell; 24. Water outlet of shell;

[0038] Drive mechanism 3;

[0039] Rotary joint 4. Detailed Implementation

[0040] To make the utility model's objectives, features, and advantages more apparent and understandable, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0041] Water-cooled screw conveyors are specialized equipment designed for conveying high-temperature materials. Their core function lies in achieving continuous material conveying and simultaneous cooling through an integrated cooling system. Currently, water-cooled screw conveyors primarily employ two cooling methods: water cooling of the screw's central shaft and water cooling of the conveyor shell layer. These designs effectively reduce the overall temperature of the equipment by using circulating cooling water to remove heat, thereby extending the conveyor's service life and improving the stability of high-temperature material conveying. The screw blades, as the core component of the conveyor, directly contact the high-temperature material, and their temperature is typically much higher than ambient temperature. For example, in the metallurgical, chemical, or energy industries, especially in the gasification industry, the temperature of gasification slag materials approaches 600℃ or even higher. However, existing technology has a key drawback: the screw blades themselves lack direct cooling measures. During long-term conveying of high-temperature materials, the screw blades face severe bending deformation due to continuous heating, leading to a reduction in the contact area between the bent blades and the material, decreasing the uniformity and speed of material conveying. Friction between the deformed blades and the shell or adjacent components accelerates mechanical wear and shortens the equipment's lifespan. Under prolonged high temperatures, the blades may break or fall off, causing a series of problems such as production accidents. This not only affects the conveying efficiency but may also lead to equipment downtime for maintenance, increasing operating costs.

[0042] This utility model provides a spiral conveyor shaft and a water-cooled spiral conveyor to solve the technical problem of temperature dead zone in the cooling of spiral blades in the prior art.

[0043] Please see Figures 1 to 3 The first aspect of this utility model provides a spiral conveyor shaft 1, comprising:

[0044] The shaft body 10 has a water passage 100 inside, and the shaft body 10 has a shaft inlet 101 for water to flow in and a shaft outlet 102 for water to flow out at both axial ends, which are connected to the water passage 100.

[0045] The spiral blade 11 is fixed outside the shaft body 10. The spiral blade 11 is provided with a spiral channel 110. The two ends of the spiral channel 110 are connected to the water passage 100.

[0046] Diverting block 12 is installed inside the water passage 100. Along the height direction of the water passage 100, the projection of diverting block 12 is located within the projection of spiral channel 110. Diverting block 12 is provided with a flow passage 120, and the through axis of flow passage 120 is arranged along the axial direction of water passage 100. Diverting block 12 is used to limit the flow rate of water in water passage 100 so that water can be diverted to spiral channel 110.

[0047] In the operation of this embodiment, when the water-cooled screw conveyor is started, water flows from the shaft inlet 101 at one end of the shaft body 10 into the water passage 100 inside the shaft body 10. Due to the presence of the diverter block 12, the flow of water in the water passage 100 is somewhat restricted, and it will not flow directly from the shaft inlet 101 to the shaft outlet 102. Although the flow passage 120 on the diverter block 12 allows water to pass through, its diameter is always smaller than that of the water passage 100. Part of the water flow will be diverted to the screw channel 110 connected to the water passage 100. The water flow entering the screw channel 110 flows along the spiral shape of the screw blade 11, and can fully contact all parts of the screw blade 11, thereby carrying away the heat absorbed by the screw blade 11 due to contact with high-temperature materials. The water flow carrying away the heat continues to flow and finally flows out from the shaft outlet 102 at the other end of the shaft body 10, completing a cooling cycle.

[0048] As can be seen from the above working process, water enters through the shaft inlet 101 at one end of the shaft body 10 and flows out through the shaft outlet 102 at the other end of the shaft body 10. The water flow entering the shaft body 10 is divided into two streams, which flow independently in the water passage 100 and the spiral passage 110 respectively. The two flow independently, resulting in good fluidity. The spiral blades 11 are directly and effectively cooled, avoiding problems such as bending deformation, breakage or detachment caused by long-term heating. This ensures the uniformity and speed of material conveying, reduces mechanical wear, extends the service life of the equipment, reduces operating costs, and improves the safety and stability of production.

[0049] In a specific implementation, such as Figure 1 and Figure 3 As shown, in order to ensure sufficient heat exchange for both the shaft body 10 and the spiral blades 11, a diversion block 12 is further arranged within the water passage 100. Along the height direction of the water passage 100, the distance between the projection of the diversion block 12 and the projection of the shaft inlet 101 is greater than the distance between the projection of the diversion block 12 and the projection of the shaft outlet 102. That is, the diversion block 12 is positioned closer to the shaft outlet 102 in the water passage 100. In practice, when water flows in, a sufficient amount of water enters the water passage 100. When there is enough water in the water passage 100, the shaft body 10 can be sufficiently cooled. Subsequent water entering will be blocked and diverted to the spiral passage 110, thereby ensuring sufficient water flow in the spiral passage 110 to cool the spiral blades 11. This improves the cooling effect of the shaft body 10 and the spiral blades 11, ensuring that the spiral conveyor shaft 1 can operate stably and efficiently.

[0050] In one embodiment, such as Figure 1 and Figure 3As shown, a feasible structure for the flow channel 120 is further provided. The diverter block 12 is provided with a water passage hole, which is the flow channel 120 (see...). Figure 1 and Figure 3 ( ); and / or, the edge of the diversion block 12 is provided with a notch, and a flow passage 120 (not shown in the figure) is formed between the notch and the inner wall of the shaft body 10. In specific implementation, the number of flow passages 120 can be one, which can be formed by a water passage hole or by the notch and the inner wall; the number of flow passages 120 can also be multiple, and multiple flow passages 120 can all be water passage holes, or all be notches, or a combination of water passage holes and notches. Those skilled in the art can choose according to actual needs.

[0051] In this embodiment, when the flow channel 120 is formed by a notch, the shape of the diverter block 12 can be any shape, as long as a notch can be formed.

[0052] In this embodiment, when the flow channel 120 is formed by water passage holes, the cross-section of the diverter block 12 on the plane perpendicular to the axis of the water passage 100 matches the cross-sectional shape of the water passage 100. The water passage holes can be regularly arranged on the diverter block 12. For example, when there is one water passage hole, the water passage hole is arranged coaxially with the water passage 100; when there are multiple water passage holes, the multiple water passage holes are evenly arranged in a circle around the axis of the water passage 100, thereby forming the flow channel 120.

[0053] In one specific embodiment, such as Figure 1 As shown, to improve the heat exchange performance of water flow within the water passage 100, a feasible structure for the shaft body 10 is further provided. The shaft body 10 includes an inlet pipe 103 with a shaft inlet 101, a hollow shaft tube 104, and an outlet pipe 105 with a shaft outlet 102. Along the axial direction of the shaft body 10, the inlet pipe 103, the hollow shaft tube 104, and the outlet pipe 105 are sequentially connected. The diameter of the inlet pipe 103 is smaller than the diameter of the outlet pipe 105. In specific implementations, the water pumped in has a large scale inhibition capacity and carries a certain amount of scale. Under a certain pressure, when water flows in from the smaller diameter inlet pipe 103, the water flow velocity will be relatively fast, forming turbulence. After the turbulence enters the hollow shaft tube 104, it can effectively break the thermal boundary layer on the inner wall of the tube. The cold fluid is quickly carried to the vicinity of the tube wall, and the hot fluid near the tube wall is also quickly carried away, resulting in sufficient heat exchange and thus removing more heat. Meanwhile, the larger diameter outlet pipe 105 is conducive to the smooth flow of water after heat exchange, avoiding water flow obstruction inside the shaft body 10 and ensuring the continuity and stability of the entire cooling process.

[0054] In one specific embodiment, such as Figure 1As shown, the screw conveyor shaft 1 also includes a counter-spiral blade 13, which is fixed to the outside of the shaft body 10. The pushing direction of the counter-spiral blade 13 is opposite to that of the screw blade 11, and the counter-spiral blade 13 is located at the end of the screw blade 11. When the screw conveyor shaft 1 is working normally, the screw blade 11 pushes the material forward, while the counter-spiral blade 13 generates a pushing force opposite to the material conveying direction. At the same time, the counter-spiral blade 13 can also increase the mixing effect of the material during the conveying process to a certain extent, making the material more uniformly mixed. In specific implementation, this design can effectively prevent the material from flowing back during the conveying process, especially when conveying some highly viscous or easily sticky materials, the effect of the counter-spiral blade 13 is more obvious. It can scrape off and push back the material that may adhere to the shaft body 10 or the inner wall of the conveyor in time, ensuring the smoothness and uniformity of the material conveying, and improving the working efficiency and conveying quality of the entire screw conveyor shaft 1.

[0055] In one specific embodiment, such as Figures 1 to 3 As shown, to improve the heat exchange performance of water flow within the spiral channel 110, a feasible structure for the shaft body 10 and the spiral blades 11 is further provided. The outer wall of the shaft body 10 is provided with a blade inlet water passage 106 and a blade outlet water passage 107. Specifically, both the blade inlet water passage 106 and the blade outlet water passage 107 are located on the outer wall of the hollow shaft tube 104. Both ends of the spiral channel 110 are connected to the water passage 100 through the blade inlet water passage 106 and the blade outlet water passage 107, respectively. The diameter of the blade inlet water passage 106 is smaller than the diameter of the blade outlet water passage 107. In specific implementation, water... After entering the spiral channel 110 through the blade inlet hole 106, the water flow speed increases due to the small diameter of the inlet hole 106. The high-speed water flow easily forms turbulence in the spiral channel 110, thereby improving the heat exchange performance. Meanwhile, the blade outlet hole 107 has a larger diameter, allowing the water to flow out of the spiral channel 110 more smoothly after heat exchange, effectively avoiding water flow obstruction in the spiral channel 110. This ensures smooth water flow throughout the system and further guarantees the continuity and stability of the cooling process.

[0056] In one specific embodiment, such as Figures 1 to 3 As shown, a feasible structure for the helical blade 11 is further provided. The helical blade 11 is welded together from two helical blade bodies, and a helical channel 110 is formed between the two helical blade bodies to allow water flow.

[0057] Please see Figure 4 The second aspect of this utility model provides a water-cooled screw conveyor, comprising:

[0058] The outer shell 2 is provided with a propulsion chamber, and the outer shell 2 is provided with an inlet 20 for material to enter and an outlet 21 for material to leave, which are connected to the propulsion chamber.

[0059] The first aspect is a spiral conveyor shaft 1, one end of which is located outside the housing 2, and the other end of which passes through the propulsion chamber and is located outside the housing 2, wherein the reverse spiral of the spiral conveyor shaft 1 is located on the side of the discharge port 21 of the housing 2 adjacent to the end of the housing 2.

[0060] Drive mechanism 3 is connected to the screw conveyor shaft 1 via a transmission.

[0061] In the operation of this embodiment, both ends of the screw conveyor shaft 1 are connected to water pumps. The water pumps are started to input water into the screw conveyor shaft 1. Then the drive mechanism 3 is started, which drives the screw conveyor shaft 1 to start rotating. At this time, the material enters the propulsion chamber from the feed port 20. Under the propulsion of the rotation of the screw conveyor shaft 1, it moves forward along the propulsion chamber. At the same time, since the screw conveyor shaft 1 has the structure described above, the blade water inlet hole 106 and the blade water outlet hole 107 on its shaft body 10 are connected to the water passage 100. Cooling water enters the screw channel 110 from the blade water inlet hole 106. In the screw channel 110, a high-speed turbulent flow is formed due to the small diameter of the water inlet hole, which improves the heat exchange performance. After the heat exchange is completed, it flows out from the blade water outlet hole 107. This cycle continues to remove the heat generated by the material during the conveying process, ensuring the temperature stability of the material during the conveying process. Finally, the material leaves the propulsion chamber from the discharge port 21, completing the entire conveying and cooling process.

[0062] In one specific embodiment, such as Figure 4 As shown, in order to avoid the influence of the external environment on the temperature of the material and the water cooling temperature in the propulsion cavity, a feasible structure for the outer shell 2 is further provided. The outer shell 2 also includes an annular heat insulation cavity 22. Along the axial direction of the spiral conveying shaft 1, the annular heat insulation cavity 22 is located in the peripheral sidewall of the outer shell 2. In specific implementation, the annular heat insulation cavity 22 can block the influence of the external ambient temperature on the temperature of the material in the propulsion cavity, further improving the temperature stability of the material during the conveying process, while also reducing the heat loss of the cooling water and improving energy utilization efficiency.

[0063] In one embodiment, such as Figure 4As shown, to further enhance the cooling effect, the outer shell 2 is also equipped with a shell inlet 23 and a shell outlet 24. Both the shell inlet 23 and the shell outlet 24 are connected to the annular heat insulation cavity 22. In specific implementation, water is introduced into the annular heat insulation cavity 22 from the shell inlet 23. The cooling water flows in the annular heat insulation cavity 22, absorbing the heat generated by the outer shell 2 due to the external ambient temperature, further reducing the influence of the external environment on the temperature of the material in the propulsion cavity. Then the cooling water flows out from the shell outlet 24, forming a circulation. This not only enhances the heat insulation effect, but also allows the flow rate of the cooling water in the annular heat insulation cavity 22 to be adjusted according to the actual situation, so as to better control the temperature of the material in the propulsion cavity and ensure that the entire conveying and cooling process is more stable and efficient.

[0064] In one embodiment, such as Figure 4 As shown, the cross-section of the outer shell 2 is circular along the plane perpendicular to the axis of the water passage 100. That is, the cross-section of the outer shell 2 is designed to be circular. In specific implementation, this structural shape makes the stress on the outer shell 2 more uniform in all directions, enhancing the structural strength and stability of the outer shell 2. At the same time, the circular cross-section can reduce the water flow resistance during the cooling water flow process, making the cooling water flow more smoothly in the annular heat insulation cavity 22, further improving the cooling effect and ensuring stable control of the material temperature in the propulsion cavity.

[0065] Based on the above embodiments, such as Figure 4 As shown, in this embodiment, the feed inlet 20 is located at the top of one side of the outer shell 2, and the discharge outlet 21 is located at the bottom of the other side of the outer shell 2; the shell water inlet 23 is located at the bottom of one side of the outer shell 2, and the shell water outlet 24 is located at the top of the other side of the outer shell 2. The shell water inlet 23 is connected to the water pump inlet pipe 103, and the shell water outlet 24 is connected to the circulating drainage pipe.

[0066] In one specific embodiment, such as Figure 4 As shown, a feasible connection method between the screw conveyor shaft 1 and external water is further provided. The water-cooled screw conveyor also includes two unidirectional rotary joints 4. The two rotary joints 4 are respectively connected to both ends of the screw conveyor shaft 1. The two rotary joints 4 are respectively connected to the shaft inlet 101 and the shaft outlet 102 of the water-cooled screw conveyor shaft 1. The rotary joints 4 are used to connect with external water pipes. In specific applications, the rotary joints 4 are used to make a stable connection with external water pipes or water pumps. External cooling water can smoothly enter the shaft inlet 101 of the water-cooled screw conveyor shaft 1 through the rotary joints 4. Then the cooling water flows inside the shaft, effectively absorbing the heat generated by the screw conveyor shaft 1 during operation and cooling the screw conveyor shaft 1. After absorbing the heat, the cooling water flows out from the shaft outlet 102 and returns to the external circulation system through another rotary joint 4, forming a complete cooling water circulation path.

[0067] In summary, the water-cooled screw conveyor provided in this application has at least the following advantages: First, it has efficient cooling, avoids local overheating, and has a longer service life: Through the direct water cooling technology of the screw blades 11, the heat inside the blades can be quickly discharged, avoiding bending and deformation of the blades due to continuous heating. First, it significantly reduces blade temperature, ensuring stability and reliability during high-temperature material conveying and extending equipment lifespan. Second, it offers high conveying efficiency, good stability, and adaptability to high-temperature material conveying scenarios: through direct water cooling technology for the spiral blades 11, a stable contact area between the spiral blades 11 and the material is maintained, ensuring uniformity and speed of material conveying. This avoids material accumulation, jamming, and spiral shaft bending caused by blade deformation during material conveying, while also ensuring the continuity and stability of material conveying, improving production efficiency, and meeting the application requirements of metallurgy, chemical, energy, and especially gasification industries for high-temperature material conveying. Third, it reduces maintenance costs: due to reduced deformation and wear of the spiral blades 11, the equipment operates more stably and reliably, reducing the frequency and duration of maintenance downtime due to equipment failure. At the same time, the extended service life of core components such as the spiral blades 11 reduces the frequency and cost of component replacement, thereby reducing overall equipment maintenance costs and improving the economic benefits for enterprises.

[0068] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0069] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

[0070] Finally, it should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. A screw conveyor shaft, characterized in that, include: The shaft body has a water passage inside, and the shaft body has a shaft inlet for water to flow in and a shaft outlet for water to flow out at both axial ends, which are connected to the water passage. A helical blade is fixed to the shaft body, and a helical channel is provided inside the helical blade, with both ends of the helical channel communicating with the water passage. The diverting block is installed inside the water passage, and its projection is located within the projection of the spiral channel along the diameter direction of the shaft body. The diverting block is provided with a flow passage, and the through axis of the flow passage is arranged along the axial direction of the water passage. The diverting block is used to limit the flow rate of water in the water passage so that the water can be diverted to the spiral channel.

2. The screw conveyor shaft according to claim 1, characterized in that, Along the diametrical direction of the shaft body, the distance between the projection of the diverter block and the projection of the shaft inlet is greater than the distance between the projection of the diverter block and the projection of the shaft outlet.

3. The screw conveyor shaft according to claim 1, characterized in that: The diversion block is provided with a water passage hole, which is the flow channel; And / or, the edge of the diverter block is provided with a notch, and the notch forms the flow channel between the inner wall of the shaft body.

4. The screw conveyor shaft according to claim 1, characterized in that, The shaft body includes an inlet pipe with the shaft inlet, a hollow shaft tube, and an outlet pipe with the shaft outlet. Along the axial direction of the shaft body, the water inlet pipe, the hollow shaft tube, and the water outlet pipe are connected in sequence. The diameter of the inlet pipe is smaller than the diameter of the outlet pipe.

5. The screw conveyor shaft according to claim 1, characterized in that, The outer wall of the shaft body is provided with blade water inlet holes and blade water outlet holes; The two ends of the spiral channel are connected to the water passage through the blade inlet and the blade outlet, respectively. The diameter of the water inlet hole of the blade is smaller than the diameter of the water outlet hole of the blade.

6. The screw conveyor shaft according to claim 1, characterized in that, The spiral conveyor shaft also includes a counter-spiral blade, which is fixed to the shaft body and the pushing direction of the counter-spiral blade is opposite to that of the spiral blade.

7. A water-cooled screw conveyor, characterized in that, include: The outer casing has a propulsion chamber, and the outer casing has an inlet for material to enter and an outlet for material to leave, which are connected to the propulsion chamber. According to any one of claims 1 to 6, one end of the spiral conveying shaft is located outside the housing, and the other end of the spiral conveying shaft passes through the propulsion cavity and is located outside the housing; A drive mechanism is connected to the screw conveyor shaft via a transmission connection.

8. The water-cooled screw conveyor according to claim 7, characterized in that, The outer casing also includes an annular heat insulation cavity; Along the axial direction of the spiral conveyor shaft, the annular heat insulation cavity is located within the peripheral sidewall of the outer shell.

9. The water-cooled screw conveyor according to claim 8, characterized in that, The outer shell is also provided with a shell inlet and a shell outlet, both of which are connected to the annular heat insulation cavity.

10. The water-cooled screw conveyor according to claim 9, characterized in that, The cross-section of the outer casing is circular along a plane perpendicular to the axis of the spiral conveyor shaft.

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