Powder dryer

Abstract

The utility model discloses a powder drying machine which comprises a machine shell and an inner container structure arranged in the machine shell. The inner container structure comprises a barrel-shaped inner container and a heating pipe arranged on the barrel-shaped inner container. The cylindrical inner container is provided with a drying cavity used for drying powder, the top end of the drying cavity is provided with an open end, the heating pipe is arranged at the bottom end, located at the drying cavity, of the cylindrical inner container, and the heating pipe and the cylindrical inner container form a single structure through an integrated casting forming technology. The heating pipe and the barrel-shaped inner container are integrally cast and formed to form a single body structure, so that the heat transfer interface is reduced, the heat loss is reduced, and the heat conduction efficiency, the heating uniformity and the energy efficiency are improved; the integrated structure avoids the problem of looseness or leakage possibly caused by welding or bolt connection, and the service life of equipment is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of powder drying, and in particular to a powder dryer. Background Technology

[0002] Currently, commercial powder dryers generally suffer from the following defects: 1. Low thermal efficiency: The contact area between the traditional welded inner liner and the heating element is small, resulting in heat conduction loss >25%; 2. High residue at discharge: The static inner liner leads to a powder adhesion rate of ≥15%, requiring manual cleaning; 3. Poor temperature control accuracy: Temperature fluctuation range is ±15℃, which can easily cause material charring or uneven drying; 4. Safety hazards: The equipment continues to run when the lid is open, posing a high risk of high-temperature gas leakage; 5. Insufficient energy efficiency: Processing coffee grounds with 60% moisture content to 10% requires ≥12 hours, with energy consumption >2.5kW·h / kg. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] The technical problem to be solved by this utility model is to provide a powder dryer that forms a single-unit structure by integrally casting the heating tube and the cylindrical inner liner, thereby reducing the heat transfer interface, reducing heat loss, and improving heat conduction efficiency, heating uniformity and energy efficiency; the integrated structure avoids the loosening or leakage problems that may be caused by welding or bolt connection, and extends the service life of the equipment.

[0005] (II) Technical Solution

[0006] The solution adopted by this utility model to solve the above-mentioned technical problems is a powder dryer, including a shell and an inner liner structure disposed within the shell; the inner liner structure includes a cylindrical inner liner and a heating tube disposed on the cylindrical inner liner; the cylindrical inner liner has a drying chamber for drying powder, the top of the drying chamber is provided with an open end, the heating tube is disposed at the bottom end of the cylindrical inner liner located at the bottom end of the drying chamber, and the heating tube and the cylindrical inner liner are integrally cast to form a single structure.

[0007] In some embodiments, the outer wall of the cylindrical inner liner is provided with a heat insulation layer, which further reduces heat loss and improves drying efficiency.

[0008] By adopting the above solution, the heating tube and the cylindrical inner liner are integrally cast to form a single structure, which reduces the heat transfer interface, reduces heat loss, and improves heat conduction efficiency, heating uniformity and energy efficiency. The integrated structure avoids the loosening or leakage problems that may be caused by welding or bolting, and extends the service life of the equipment.

[0009] In some embodiments, a rotating structure is provided inside the cylindrical inner liner, the rotating structure including a rotating shaft that can rotate relative to the cylindrical inner liner, and a plate fixed on the rotating shaft.

[0010] Specifically, there are multiple plates, which are distributed irregularly along the axial direction of the rotation axis.

[0011] Using the above scheme, the rotating shaft drives the plate to rotate, which can turn the powder, so that the powder can be heated evenly during the drying process, avoiding powder agglomeration and local overheating, improving drying uniformity and product quality, accelerating the moisture evaporation process, and shortening the drying time.

[0012] In some embodiments, a drive structure is further included, which is connected to one end of the rotating shaft to drive the rotating shaft to rotate about its own central axis.

[0013] By adopting the above scheme, the drive structure enables the rotating shaft to rotate automatically, reducing manual intervention, improving production efficiency, and making the drying process more automated and standardized.

[0014] In some embodiments, the drive structure includes a drive motor, a first pulley connected to the output end of the drive motor, a second pulley connected to one end of the rotating shaft, and a belt wound around the first pulley and the second pulley; and the shaft diameter of the first pulley is smaller than the shaft diameter of the second pulley.

[0015] Specifically, the surface heat flux density of the heating tube is 2.14 W / cm², the diameter of the cylindrical inner liner is 300 mm, and the rotation speed of the drive motor is 5 r / min, which improves the heat conduction efficiency by 37% (the measured contact area increases by 90%), reduces energy consumption to 0.64 kW·h / kg, and reduces the residual rate of the discharged material to ≤3%, which is 80% less than that of the traditional structure.

[0016] The above design, which uses a first pulley shaft diameter smaller than the second pulley shaft diameter, achieves speed reduction transmission. This speed reduction transmission provides greater torque, ensuring stable rotation during the drying process. At the same time, the belt drive has a buffering effect, reducing mechanical impact, lowering motor power requirements, and saving energy.

[0017] In some embodiments, the rotating shaft extends out of the cylindrical inner liner at both ends along its axial direction and is connected to the housing; the drive structure is located in the space outside the cylindrical inner liner within the housing and is connected to either end of the rotating shaft.

[0018] In some embodiments, fixing plates are provided on both sides of the cylindrical inner liner inside the housing for mounting the rotating shaft, thereby enhancing the overall structural strength.

[0019] The above scheme is adopted, with both ends of the rotating shaft extending out and connecting to the housing, which enhances structural rigidity, reduces vibration and sway, and improves structural stability; the drive structure is external, which facilitates maintenance and avoids the impact of high temperature environment on the life of drive motor.

[0020] In some embodiments, a bearing is provided between the cylindrical inner liner and the rotating shaft so that the cylindrical inner liner can rotate relative to the rotating shaft.

[0021] By adopting the above solution, the bearing supports the rotation of the rotating shaft and allows the cylindrical inner liner to rotate as a whole, realizing multi-degree-of-freedom motion, thereby achieving the tilting of the cylindrical inner liner to realize the gravity discharge of materials; moreover, it reduces friction, extends the service life of the equipment, improves the operational stability and reliability, and reduces energy consumption and noise.

[0022] In some embodiments, the cylindrical inner liner is rotatable between a first position and a second position about the rotation axis, and when the cylindrical inner liner is in the first position, the cylindrical inner liner is in a vertical state and the open end of the drying chamber is arranged upward; when the cylindrical inner liner is in the second position, the cylindrical inner liner is in an inclined state and the open end of the drying chamber is arranged forward; and the first position and the second position form an angle of 105 degrees.

[0023] Using the above scheme, the cylindrical inner liner can rotate between the first position (vertical state) and the second position (tilted state); the vertical state facilitates drying operations, while the tilted state facilitates material discharge; the 105° angle design optimizes the smoothness of discharge and avoids residue (vertical drying → tilted discharge); the tilted state has the opening facing forward, which facilitates observation and cleaning and reduces the difficulty of operation.

[0024] In some embodiments, the front end of the housing is provided with an opening, and a door is detachably connected to the opening; the rear end of the housing is provided with a locking part for locking the cylindrical inner liner, and the rear end of the cylindrical inner liner is provided with a locking engagement part that can cooperate with the locking part.

[0025] Specifically, after the door is removed from the housing, it can act on the cylindrical inner liner, causing the locking engagement part and the locking part to disengage. The cylindrical inner liner is then in a freely rotatable state, rotating from the first position to the second position, so that the open end of the cylindrical inner liner faces the front end, realizing the material's gravity discharge. The gravity discharge design reduces product damage and material residue.

[0026] The above-mentioned design ensures the stability of the inner liner position during the drying process by using the locking part and the locking mating part; the detachable door design facilitates the feeding and removal of materials; the cylindrical inner liner is unlocked after the door is removed, allowing gravity-fed material discharge and reducing the risk of manual material handling; the locking part can only be rotated by actively unlocking it to avoid accidental tilting during the drying process.

[0027] In some embodiments, an unlocking mechanism is also included that can drive the locking engagement part to disengage from the locking part, making the operation more convenient and safer, and pneumatic / electric unlocking may be used.

[0028] In some embodiments, a temperature sensor and a controller are also included, wherein the temperature sensor is used to monitor the axial / radial temperature gradient of the cylindrical inner liner in real time; and the controller adjusts the power of the heating element based on a fuzzy PID algorithm.

[0029] Specifically, the temperature sensor is an MF58 R type thermistor with a fuzzy PID algorithm response time of <1.5s, which helps maintain the working temperature of the cylindrical inner liner within the range of 95±2℃; improves drying uniformity (the standard deviation of moisture content decreases from ±3.5% to ±0.8%); achieves an energy saving rate of ≥22% (compared to traditional ON / OFF temperature control); and also features a human-machine interface that can set and display drying parameters and operating status.

[0030] Using the above scheme, the temperature sensor monitors the temperature gradient of the cylindrical inner liner in real time to ensure drying quality; the fuzzy PID algorithm achieves precise temperature control; the temperature sensor, combined with the fuzzy PID algorithm, dynamically adjusts the power to cope with axial / radial temperature gradients and prevent overheating or uneven drying; precise temperature control reduces energy waste while ensuring the stability of powder properties (such as avoiding the denaturation of heat-sensitive materials).

[0031] In some embodiments, a cover is rotatably connected to the top of the housing; a safety protection structure is also provided inside the housing for detecting the opening and closing state of the cover and triggering a corresponding safety response; the safety protection structure includes a Hall sensor for detecting the opening and closing state of the cover; a power cut-off circuit connected to the Hall sensor, which cuts off the main power supply when the cover is detected to be in the open state; and an emergency air-cooling system connected to the Hall sensor, which automatically starts when the cover is detected to be in the open state, and the exhaust volume of the emergency air-cooling system is 400 m³ / h.

[0032] Specifically, it also features a function key designed to prevent accidental touches, which needs to be pressed and held for 3 seconds to activate.

[0033] Using the above solution, the Hall sensor detects the cover status, triggering power cut-off and emergency air cooling to prevent high-temperature burns or dust explosions, thus improving operational safety. The emergency air cooling system reduces the internal temperature when the cover is suddenly opened, ensuring the safety of operators. The comprehensive safety protection design effectively protects the safety of operators and extends the lifespan of the equipment.

[0034] (III) Beneficial Effects

[0035] Compared with the existing technology, this utility model designs a powder dryer.

[0036] (1) This utility model forms a single structure by integrally casting the heating tube and the cylindrical inner liner, reducing the heat transfer interface, reducing heat loss, and improving heat conduction efficiency, heating uniformity and energy efficiency; the integrated structure avoids the loosening or leakage problems that may be caused by welding or bolt connection, and extends the service life of the equipment.

[0037] (2) This utility model drives the plate to rotate by rotating the shaft, which can turn the powder, so that the powder can be heated evenly during the drying process, avoiding powder agglomeration and local overheating, improving drying uniformity and product quality, accelerating the moisture evaporation process, and shortening the drying time.

[0038] (3) This utility model realizes automatic rotation of the rotating shaft through the drive structure, reduces manual intervention, improves production efficiency, and makes the drying process more automated and standardized; moreover, the design that the shaft diameter of the first pulley is smaller than that of the second pulley realizes the speed reduction transmission, which provides greater torque and ensures stable rotation during the drying process; at the same time, the belt drive has buffering properties, reduces mechanical impact, reduces motor power requirements, and saves energy.

[0039] (4) The bearing of this utility model supports the rotation of the rotating shaft and allows the cylindrical inner liner to rotate as a whole, realizing multi-degree-of-freedom motion, thereby realizing the tilting of the cylindrical inner liner to achieve the material gravity discharge; moreover, it reduces friction, extends the service life of the equipment, improves the stability and reliability of operation, and reduces energy consumption and noise.

[0040] (5) The cylindrical inner liner of this utility model can rotate between the first position (vertical state) and the second position (inclined state); the vertical state facilitates drying operation, and the inclined state facilitates material discharge; the 105° angle design optimizes the smoothness of discharge and avoids residue (vertical drying → inclined discharge); the inclined state has an open front, which facilitates observation and cleaning and reduces the difficulty of operation.

[0041] (6) The design of the locking part and the locking mating part ensures the stability of the inner liner position during the drying process; the detachable door design facilitates the feeding and removal of materials; the cylindrical inner liner is unlocked after the door is removed, so as to achieve gravity flow out of the material and reduce the risk of manual material removal; the locking part needs to be actively unlocked before it can be rotated to avoid accidental tilting during the drying process.

[0042] (7) This utility model monitors the temperature gradient of the cylindrical inner liner in real time through a temperature sensor to ensure drying quality; the fuzzy PID algorithm realizes precise temperature control; the temperature sensor combined with the fuzzy PID algorithm dynamically adjusts the power to cope with the axial / radial temperature gradient and prevent overheating or uneven drying; precise temperature control reduces energy waste and ensures the stability of powder properties (such as avoiding the denaturation of heat-sensitive materials).

[0043] (8) This utility model detects the state of the cover through a Hall sensor, triggers power cut-off and emergency air cooling to prevent high temperature burns or dust explosions, and improves operational safety; the emergency air cooling system reduces the internal temperature when the cover is suddenly opened, ensuring the safety of the operator. The all-round safety protection design effectively protects the safety of the operator and the life of the equipment. Attached Figure Description

[0044] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the structure of a powder dryer according to the present invention;

[0046] Figure 2 This is a partial structural schematic diagram of a powder dryer according to the present invention;

[0047] Figure 3 This is a partial structural diagram of a powder dryer according to this utility model from another angle;

[0048] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0049] Figure 5 This is an exploded view of the inner liner structure of this utility model;

[0050] Figure 6 This is a cross-sectional view of a powder dryer according to the present invention;

[0051] Figure 7 for Figure 6 Enlarged view of point B in the middle;

[0052] Figure 8 for Figure 6 Enlarged diagram of point C in the middle.

[0053] The component names corresponding to the various reference numerals in the figure are as follows: 100, housing; 101, opening; 102, locking part; 103, fixing plate; 200, inner liner structure; 201, cylindrical inner liner; 2011, drying chamber; 2011a, open end; 2012, locking mating part; 202, heating tube; 203, rotating structure; 2031, rotating shaft; 2032, plate; 204, insulation layer; 300, drive structure; 301, drive motor; 302, first pulley; 303, second pulley; 304, belt; 400, bearing; 500, door; 600, cover; 700, emergency air cooling system. Detailed Implementation

[0054] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but should not be used to limit the scope of this utility model.

[0055] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0056] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0057] It should be noted that the following description covers various aspects of embodiments within the scope of the appended claims. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0058] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0059] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0060] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0061] like Figures 1-8 As shown, this utility model provides a powder dryer, including a casing 100 and an inner liner structure 200 disposed within the casing 100. The inner liner structure 200 includes a cylindrical inner liner 201 and a heating tube 202 disposed on the cylindrical inner liner 201. The cylindrical inner liner 201 has a drying chamber 2011 for drying powder, with an open end 2011a at the top. The heating tube 202 is disposed at the bottom end of the cylindrical inner liner 201 located within the drying chamber 2011. Furthermore, the heating tube 202 and the cylindrical inner liner 201 are integrally cast to form a single structure. In some embodiments, the outer wall of the cylindrical inner liner 201 is provided with a heat insulation layer 204, further reducing heat loss and improving drying efficiency. By adopting the above solution, the heating tube 202 and the cylindrical inner liner 201 are integrally cast to form a single structure, which reduces the heat transfer interface, reduces heat loss, and improves heat conduction efficiency, heating uniformity and energy efficiency. The integrated structure avoids the loosening or leakage problems that may be caused by welding or bolt connection, and extends the service life of the equipment.

[0062] In some embodiments, a rotating structure 203 is provided inside the cylindrical inner liner 201. The rotating structure 203 includes a rotating shaft 2031 rotatable relative to the cylindrical inner liner 201 and plates 2032 fixed on the rotating shaft 2031. Specifically, there are multiple plates 2032, distributed irregularly along the axial direction of the rotating shaft 2031. Using this scheme, the rotating shaft 2031 drives the plates 2032 to rotate, which can agitate the powder, ensuring uniform heating during the drying process. This avoids powder agglomeration and localized overheating, improves drying uniformity and product quality, accelerates the moisture evaporation process, and shortens the drying time.

[0063] In some embodiments, a drive structure 300 is further included, which is connected to one end of the rotating shaft 2031 to drive the rotating shaft 2031 to rotate about its own central axis. Using the above scheme, the drive structure 300 enables the rotating shaft 2031 to rotate automatically, reducing manual intervention, improving production efficiency, and making the drying process more automated and standardized. In some embodiments, the drive structure 300 includes a drive motor 301, a first pulley 302 connected to the output end of the drive motor 301, a second pulley 303 connected to one end of the rotating shaft 2031, and a belt 304 wound around the first pulley 302 and the second pulley 303; and the shaft diameter of the first pulley 302 is smaller than the shaft diameter of the second pulley 303. Specifically, the surface heat flux density of the heating tube 202 is 2.14 W / cm², the diameter of the cylindrical inner liner 201 is 300 mm, and the rotation speed of the drive motor 301 is 5 r / min, resulting in a 37% increase in heat conduction efficiency (90% increase in measured contact area), a reduction in energy consumption to 0.64 kW·h / kg, and a discharge residue rate of ≤3%, which is 80% lower than that of traditional structures. Using the above scheme, the design of the first pulley 302 having a smaller shaft diameter than the second pulley 303 achieves speed reduction transmission, which provides greater torque and ensures stable rotation during the drying process. Simultaneously, the belt drive 304 has a buffering effect, reducing mechanical impact, lowering motor power requirements, and saving energy. In some embodiments, the rotating shaft 2031 extends from both ends of the cylindrical inner liner 201 along its axial direction and is connected to the housing 100; the drive structure 300 is located in the space outside the cylindrical inner liner 201 within the housing 100 and is connected to either end of the rotating shaft 2031. In some embodiments, fixing plates 103 are provided on both side walls of the cylindrical inner liner 201 within the housing 100 for mounting the rotating shaft 2031, thereby enhancing the overall structural strength. With this design, the rotating shaft 2031 extends out at both ends and connects to the housing 100, enhancing structural rigidity, reducing vibration and sway, and improving structural stability; the external drive structure facilitates maintenance and avoids the impact of high-temperature environments on the lifespan of the drive motor 301.

[0064] In some embodiments, a bearing 400 is provided between the cylindrical inner liner 201 and the rotating shaft 2031, allowing the cylindrical inner liner 201 to rotate relative to the rotating shaft 2031. With this design, the bearing 400 supports both the rotation of the rotating shaft 2031 and the overall rotation of the cylindrical inner liner 201, achieving multi-degree-of-freedom motion. This allows for the tilting of the cylindrical inner liner 201, enabling gravity-flow material discharge. Furthermore, it reduces friction, extends the equipment's service life, improves operational stability and reliability, and reduces energy consumption and noise. In some embodiments, the cylindrical inner liner 201 is rotatable between a first position and a second position around the rotation axis 2031. In the first position, the cylindrical inner liner 201 is vertical with the open end 2011a of the drying chamber 2011 facing upwards. In the second position, the cylindrical inner liner 201 is tilted with the open end 2011a of the drying chamber 2011 facing forward. Furthermore, the first and second positions form an angle of 105 degrees. With this design, the cylindrical inner liner 201 can rotate between the first position (vertical) and the second position (tilted). The vertical position facilitates drying operations, while the tilted position facilitates material discharge. The 105° angle design optimizes discharge smoothness and avoids residue (vertical drying → tilted discharge). The tilted position with the open end facing forward facilitates observation and cleaning, reducing operational difficulty.

[0065] In some embodiments, the front end of the housing 100 is provided with an opening 101, and a door 500 is detachably connected to the opening 101; the rear end of the housing 100 is provided with a locking part 102 for locking the cylindrical inner liner 201, and the rear end of the cylindrical inner liner 201 is provided with a locking engagement part 2012 that can cooperate with the locking part 102. Specifically, after the door 500 is removed from the housing 100, it can act on the cylindrical inner liner 201, causing the locking engagement part 2012 and the locking part 102 to disengage, so that the cylindrical inner liner 201 is in a freely rotatable state, and can rotate from a first position to a second position, so that the open end 2011a of the cylindrical inner liner 201 faces the front end, realizing the material gravity discharge. The gravity discharge design reduces product damage and material residue. The above-mentioned design ensures the stability of the inner liner position during the drying process by using the locking part 102 and the locking mating part 2012; the detachable design of the door 500 facilitates the input and output of materials; after the door 500 is removed, the cylindrical inner liner 201 is unlocked, allowing gravity-fed material discharge and reducing the risk of manual material handling; the locking part 102 can only be rotated by actively unlocking it to avoid accidental tilting during the drying process.

[0066] In some embodiments, a temperature sensor and a controller are also included. The temperature sensor is used to monitor the axial / radial temperature gradient of the cylindrical inner liner 201 in real time; the controller adjusts the power of the heating element 202 based on a fuzzy PID algorithm. Specifically, the temperature sensor is an MF58 R-type thermistor, the fuzzy PID algorithm has a response time of <1.5s, and can maintain the operating temperature of the cylindrical inner liner 201 within the range of 95±2℃; drying uniformity is improved (the standard deviation of moisture content decreases from ±3.5% to ±0.8%); energy saving rate is ≥22% (compared to traditional ON / OFF temperature control); a human-machine interface is also provided, which can set and display drying parameters and operating status. Using the above scheme, the temperature sensor monitors the temperature gradient of the cylindrical inner liner 201 in real time to ensure drying quality; the fuzzy PID algorithm achieves precise temperature control; the temperature sensor, combined with the fuzzy PID algorithm, dynamically adjusts the power to cope with the axial / radial temperature gradient, preventing overheating or uneven drying; precise temperature control reduces energy waste while ensuring the stability of powder properties (such as avoiding the denaturation of heat-sensitive materials).

[0067] In some embodiments, a cover 600 is rotatably connected to the top of the housing 100; a safety protection structure is also provided inside the housing 100 for detecting the opening and closing state of the cover 600 and triggering a corresponding safety response; the safety protection structure includes a Hall sensor for detecting the opening and closing state of the cover 600; a power cut-off circuit connected to the Hall sensor, which cuts off the main power supply when the cover 600 is detected to be in the open state; and an emergency air-cooling system 700 connected to the Hall sensor, which automatically starts when the cover 600 is detected to be in the open state, and the exhaust volume of the emergency air-cooling system 700 is 400 m³ / h. Specifically, it also has a function key with an anti-accidental touch design, which needs to be pressed and held for 3 seconds to activate. Using the above scheme, the Hall sensor detects the state of the cover 600, triggering power cut-off and emergency air-cooling to prevent high-temperature burns or dust explosions, improving operational safety; the emergency air-cooling system reduces the internal temperature when the cover is suddenly opened, ensuring the safety of operators. The comprehensive safety protection design effectively protects the safety of operators and the lifespan of the equipment.

[0068] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0069] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A powder dryer characterized by: The device includes a housing (100) and an inner liner structure (200) disposed within the housing (100); the inner liner structure (200) includes a cylindrical inner liner (201) and a heating tube (202) disposed on the cylindrical inner liner (201); the cylindrical inner liner (201) has a drying chamber (2011) for drying powder, the top end of the drying chamber (2011) is provided with an open end (2011a), the heating tube (202) is disposed at the bottom end of the cylindrical inner liner (201) located in the drying chamber (2011), and the heating tube (202) and the cylindrical inner liner (201) are formed into a single structure by an integral casting process.

2. The powder dryer of claim 1, wherein: The cylindrical inner liner (201) is provided with a rotating structure (203), which includes a rotating shaft (2031) that can rotate relative to the cylindrical inner liner (201) and a plate (2032) fixed on the rotating shaft (2031).

3. The powder dryer of claim 2, wherein: It also includes a drive structure (300) connected to one end of the rotating shaft (2031) to drive the rotating shaft (2031) to rotate about its own central axis.

4. The powder dryer of claim 3, wherein: The drive structure (300) includes a drive motor (301), a first pulley (302) connected to the output end of the drive motor (301), a second pulley (303) connected to one end of the rotating shaft (2031), and a belt (304) wound around the first pulley (302) and the second pulley (303); and the shaft diameter of the first pulley (302) is smaller than the shaft diameter of the second pulley (303).

5. The powder dryer of claim 3, wherein: The rotating shaft (2031) extends out of the cylindrical inner liner (201) at both ends along its axial direction and is connected to the housing (100); the driving structure (300) is located in the space outside the cylindrical inner liner (201) of the housing (100) and is connected to either end of the rotating shaft (2031).

6. The powder dryer of claim 2, wherein: A bearing (400) is provided between the cylindrical inner liner (201) and the rotating shaft (2031) so that the cylindrical inner liner (201) can rotate relative to the rotating shaft (2031).

7. The powder dryer of claim 6, wherein: The cylindrical inner liner (201) is rotatable around the rotation axis (2031) between a first position and a second position. When the cylindrical inner liner (201) is in the first position, it is vertical and the open end (2011a) of the drying chamber (2011) is facing upward. When the cylindrical inner liner (201) is in the second position, it is tilted and the open end (2011a) of the drying chamber (2011) faces forward. The first position and the second position form an angle of 105 degrees.

8. The powder dryer of claim 6, wherein: The front end of the housing (100) is provided with an opening (101), and a door (500) is detachably connected to the opening (101); the rear end of the housing (100) is provided with a locking part (102) for locking the cylindrical inner liner (201), and the rear end of the cylindrical inner liner (201) is provided with a locking engagement part (2012) that can cooperate with the locking part (102).

9. The powder dryer of claim 1, wherein: It also includes a temperature sensor and a controller, wherein the temperature sensor is used to monitor the axial / radial temperature gradient of the cylindrical inner liner (201) in real time; and the controller adjusts the power of the heating tube (202) based on a fuzzy PID algorithm.

10. The powder dryer of claim 1, wherein: The top of the housing (100) is rotatably connected to a cover (600); the housing (100) is also provided with a safety protection structure for detecting the opening and closing state of the cover (600) and triggering a corresponding safety response; the safety protection structure includes a Hall sensor for detecting the opening and closing state of the cover (600); a power cut-off circuit connected to the Hall sensor, which cuts off the main power supply when the cover (600) is detected to be in the open state; and an emergency air cooling system (700) connected to the Hall sensor, which automatically starts when the cover (600) is detected to be in the open state.

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