Mixing structure and automatic powder spraying device

Abstract

This utility model relates to a mixing structure and an automatic powder spraying device, belonging to the chemical industry. The mixing structure includes: a shell assembly; a mixing housing assembly disposed on the shell assembly, the mixing housing assembly having a first mixing chamber and a second mixing chamber; a feeding housing disposed on the mixing housing assembly, the feeding housing having a feeding inlet and a transition chamber; a mixing device, part of the mixing device disposed on the feeding housing, the part of the mixing device sequentially passing through the transition chamber, the first mixing chamber, and the second mixing chamber; and a feeding housing disposed on the shell assembly, the feeding housing having a discharge chamber, the feeding inlet, the transition chamber, the first mixing chamber, the second mixing chamber, and the discharge chamber being sequentially connected. This application discloses a mixing structure that, by providing a first mixing chamber and a second mixing chamber, in conjunction with a through-type mixing device, constructs a progressive processing flow of premixing and deep mixing.

Description

Technical Field

[0001] This utility model relates to the chemical industry, and in particular to a stirring and mixing structure and an automatic powder spraying device. Background Technology

[0002] In today's chemical industry, there is a lack of a stirring device for inert dust. Unstirred inert dust tends to clump together or be unevenly distributed, making it impossible to form a homogeneous and stable dispersion system. It is also difficult to achieve precise proportioning and full integration with flammable and explosive dust. As a result, the dilution and barrier effects of inert dust on flammable and explosive dust are greatly weakened or even completely rendered ineffective, which seriously endangers the lives of operators. Utility Model Content

[0003] Therefore, it is necessary to provide a mixing structure and an automatic powder spraying device to address the lack of a mixing device for inert dust.

[0004] A mixing structure includes: a shell assembly; a mixing housing assembly disposed on the shell assembly, the mixing housing assembly having a first mixing chamber and a second mixing chamber; a feeding housing disposed on the mixing housing assembly, the feeding housing having a feeding inlet and a transition chamber, the number of the feeding inlets being multiple; a mixing device, a portion of the mixing device being disposed on the feeding housing, the portion of the mixing device sequentially passing through the transition chamber, the first mixing chamber and the second mixing chamber; and a feeding housing disposed on the shell assembly, the feeding housing having a discharging chamber, the multiple feeding inlets, the transition chamber, the first mixing chamber, the second mixing chamber and the discharging chamber being sequentially connected.

[0005] The above-disclosed mixing structure is used in an automatic powder spraying device. This mixing structure, with its scientific component layout and collaborative design, demonstrates significant advantages in the treatment of inert dust mixing and the prevention and control of flammable and explosive dust risks, providing key technical support for efficient and safe production in various industries. By incorporating a first and second mixing chamber, along with a through-type mixing device, a progressive processing flow of premixing and in-depth mixing is constructed. During feeding, inert dust enters the transition chamber through multiple inlets. At this stage, the mixing device first performs preliminary premixing to avoid uneven mixing caused by dust accumulation. Subsequently, the dust sequentially enters the first and second mixing chambers. Under the continuous action of the mixing device, the mixing path and contact time of the dust within the chambers are extended, effectively breaking the agglomeration of inert dust and ensuring that the input inert dust is fully and uniformly mixed. This solves the mixing dead zone problem that easily occurs in traditional mixing structures, laying a uniform foundation for subsequent control of flammable and explosive dust concentration. Meanwhile, the transition chamber of the feed housing is sequentially connected to the first stirring chamber, the second stirring chamber, and the discharge chamber of the feeding housing, forming a closed and orderly material transmission channel to prevent dust from escaping or leaking during transmission and reduce the possibility of abnormal fluctuations in dust concentration in the environment.

[0006] In one embodiment, the stirring device includes a mounting housing, a stirring power assembly, an upper stirring assembly, and a lower stirring assembly. The mounting housing is disposed on the feed housing. The stirring power assembly is disposed on the mounting housing, with a portion of the stirring power assembly passing through the transition cavity and located in the first stirring cavity. The upper stirring assembly is disposed on the stirring power assembly, with a portion of the upper stirring assembly located in the transition cavity and the remainder of the upper stirring assembly located in the first stirring cavity. The lower stirring assembly is disposed on the stirring power assembly, with a portion of the lower stirring assembly passing through the first stirring cavity and the remainder of the lower stirring assembly located in the second stirring cavity. By precisely coordinating the mounting housing, stirring power assembly, upper stirring assembly, and lower stirring assembly, the stirring device forms an integrated working mechanism of "power drive - segmented stirring - progressive transmission," providing core power and efficient stirring support for the mixing and processing of inert dust in different cavities. The mounting housing, as the basic load-bearing structure, is stably mounted on the feed housing, providing a stable mounting platform for the stirring power assembly and avoiding the impact of vibrations generated during power operation on the overall structural stability. The stirring power unit, as the core driving force, is installed on the mounting housing and partially extends through the transition chamber into the first stirring chamber. It can output continuous and stable power to provide energy support for the operation of the upper and lower stirring components. The upper stirring component is mounted on the stirring power unit, with part of it located in the transition chamber and the rest in the first stirring chamber. In the transition chamber, it can initially disperse and pre-stir the inert dust that has just entered, preventing dust from accumulating and clogging below the feed inlet. At the same time, it smoothly transports the pre-mixed dust to the first stirring chamber. The part entering the first stirring chamber further enhances the stirring effect, breaking up dust agglomerates and laying the foundation for subsequent in-depth mixing. The lower stirring component is also installed on the stirring power unit, with part of it passing through the first stirring chamber and the rest in the second stirring chamber. It can both receive the initially mixed dust in the first stirring chamber and smoothly transport it to the second stirring chamber through stirring, and deeply stir the dust in the second stirring chamber to further improve the mixing uniformity and ensure that the final output inert dust mixture meets the standards.

[0007] In one embodiment, the upper stirring assembly includes a first upper stirring member and a second upper stirring member. The first upper stirring member is disposed on the stirring power assembly and located in the transition chamber, while the second upper stirring member is disposed on the stirring power assembly, passing through the transition chamber and extending into the first stirring chamber. By assembling the first upper stirring member with the stirring power assembly, the assembly starts operating the moment the inert dust enters the transition chamber from the feed inlet. This quickly disperses the dust clumps formed by particle adsorption during the falling process, preventing dust from accumulating at the bottom of the transition chamber due to gravity, effectively preventing blockage of the feed channel and ensuring the continuity of material transmission. The second upper stirring member, which is distributed in a through-type manner, is also connected to the stirring power assembly. It receives the premixed dust from the transition chamber and intensifies the stirring of the dust through continuous rotation. This not only further breaks down residual micro-dust agglomerates but also guides the dust towards the bottom of the first stirring chamber using the driving force generated by the stirring. This ensures a precise connection for the lower stirring assembly to transport the dust to the second stirring chamber for deep mixing, preventing dust from accumulating inside the first stirring chamber.

[0008] In one embodiment, the first upper stirring component includes a first fixing member and a first stirring member. The first fixing member is disposed on the stirring power assembly, and the first stirring member is disposed on the first fixing member and extends obliquely away from the first fixing member. By tightly disposing the first fixing member on the stirring power assembly, on the one hand, the first stirring member can be firmly fixed on the stirring power assembly, ensuring that the first stirring member will not loosen or shift due to dust impact or its own centrifugal force during high-speed stirring, thus ensuring the stability and safety of the entire assembly operation; on the other hand, it provides a reliable force transmission path for the first stirring member, enabling the torque output by the stirring power assembly to be efficiently transmitted to the first stirring member, so that the first stirring member obtains continuous and stable rotational power, avoiding the decrease in stirring efficiency due to poor power transmission, and providing a stable power foundation for subsequent dust treatment. At the same time, the design of the first fixing member and the first stirring member being integrally formed completely eliminates the connection gaps and assembly errors between the fixing member and the stirring member in traditional split assembly, making the two form a complete and more rigid overall structure. During high-speed mixing, the first mixing component is subjected to the impact of inert dust and the centrifugal force generated by its own rotation. The one-piece molded structure can evenly distribute these forces to the entire first upper mixing component, avoiding the problems of loosening, displacement or even breakage caused by insufficient strength of the connecting parts in the split design.

[0009] In one embodiment, the second upper stirring member includes a second fixing member, a second extension member, and a second stirring member. The second fixing member is disposed on the stirring power assembly, passes through the transition cavity, and extends into the first stirring cavity. The second extension member is disposed on the second fixing member and extends obliquely away from the second fixing member, and is located in the first stirring cavity. The second stirring member is disposed on the second extension member and is located in the first stirring cavity. The stirring housing assembly includes a first stirring housing, and the second stirring member is parallel to the inner surface of the first stirring housing. By installing the second fixing member on the stirring power assembly and extending through the transition cavity into the first stirring cavity, the torque output by the stirring power assembly can be stably received, and the power can be stably transmitted to the second extension member and the second stirring member, ensuring that the three operate synchronously and avoiding loosening or delay during power transmission. On the other hand, its through-type structure provides a stable mounting carrier for the second extension member and the second stirring member. The second extension member is installed on the second fixing member and extends obliquely away from the fixing member, while being completely within the first stirring cavity, expanding the contact range with the dust and continuously breaking up the residual clumps in the premixed dust, laying the foundation for deep stirring of the second stirring member. The second agitator is installed on the second extension and located in the first mixing chamber. Crucially, its design, parallel to the inner surface of the first mixing shell, allows the second agitator to closely conform to the inner wall of the first mixing shell during operation. This completely eliminates dead angles between the agitator and the inner wall of the chamber, ensuring that dust in the side walls and corners of the first mixing chamber is fully agitated. This prevents uneven mixing caused by long-term accumulation of dust in certain areas, resulting in more uniform dust mixing throughout the first mixing chamber. The second fixing member, the second extension, and the second agitator are integrally molded, completely eliminating the connection gaps, bolt holes, or welding points between components in traditional split-assembly. This forms a complete and extremely rigid integrated structure, ensuring stable operation of the second agitator during the mixing process.

[0010] In one embodiment, the lower stirring assembly includes a rotating shaft and a lower stirring body. The rotating shaft is mounted on the stirring power assembly, passes through the first stirring chamber and extends into the second stirring chamber, extending along the length of the second stirring chamber. The lower stirring body is mounted on the rotating shaft and spirally distributed around the rotating shaft along its length, located within the second stirring chamber. By mounting the rotating shaft on the stirring power assembly and extending it through the first stirring chamber into the second stirring chamber, along its length, power can be efficiently and synchronously transmitted to the lower stirring body. This ensures stable operation of the lower stirring body along with the rotating shaft, preventing loosening or speed fluctuations during power transmission, and providing a continuous and stable power foundation for subsequent spiral stirring and material conveying. Furthermore, the structure extending along the length of the second stirring chamber allows the rotating shaft to cover the entire space of the second stirring chamber, creating conditions for the lower stirring body to be distributed along its length, ensuring that the stirring action can penetrate the entire length of the second stirring chamber and avoiding localized stirring blind spots caused by insufficient shaft length. The lower mixing body is spirally distributed around the shaft along its length, creating a multi-dimensional mixing effect on the dust in the second mixing chamber. The spiral blades not only break up residual small clumps of dust, but also cause the dust to tumble up and down and convect left and right through rotation, allowing dust from different areas to fully collide and merge, achieving deep and uniform mixing of inert dust. This solves the problem of distinct mixing layers and insufficient uniformity that often occurs with traditional straight-blade mixers. Moreover, the spirally distributed lower mixing body generates thrust along the length of the second mixing chamber, continuously pushing the dust towards the discharge end of the second mixing chamber, thus preventing dust from accumulating in the second mixing chamber.

[0011] In one embodiment, the stirring power assembly includes a first stirring motor, a second stirring motor, a first rotary connector, and a second rotary connector. Both the first and second stirring motors are mounted on the mounting housing. The first rotary connector is mounted on and driven by the first stirring motor, and the second rotary connector is mounted on and driven by the second stirring motor. The upper stirring assembly is mounted on the first rotary connector, and the lower stirring assembly is mounted on the second rotary connector. By mounting both the first and second stirring motors on the mounting housing, a stable dual-power output base is formed. The output speed and torque can be independently adjusted according to the different stirring requirements of the cavities where the upper and lower stirring assemblies are located, avoiding the limitations of a single-motor drive that cannot simultaneously accommodate the characteristics of different stirring stages. The upper mixing assembly is responsible for dispersing and premixing dust in the transition chamber and the first mixing chamber, and stirring the powder towards the center. The first rotary connector efficiently transmits the power of the first mixing motor to the upper mixing assembly, providing a suitable mixing intensity to ensure that the dust is quickly dispersed and stirred towards the center, laying the foundation for subsequent conveying. The lower mixing assembly undertakes the tasks of deep mixing and material conveying in the second mixing chamber. The second rotary connector stably transmits the power of the second mixing motor to the lower mixing assembly, and can output matching power parameters to ensure the uniformity of mixing and smooth conveying.

[0012] In one embodiment, the mixing housing assembly includes a first mixing housing and a second mixing housing. The first mixing housing is disposed on the outer housing assembly, the feed housing is disposed at one end of the first mixing housing, and the second mixing housing is disposed on the first mixing housing and located at the end away from the feed housing. The first mixing housing has a first mixing chamber, and the second mixing housing has a second mixing chamber. The cross-sectional area of ​​the first mixing chamber gradually decreases along the side closer to the second mixing chamber. By placing the first mixing housing on the outer housing assembly as a basic supporting cavity, a stable installation platform is provided for the feed housing, ensuring that the feed inlet and the transition cavity can accurately align with the first mixing chamber, and ensuring a smooth transition of inert dust from feeding to initial mixing. The second mixing housing is installed on the first mixing housing, and the internal second mixing chamber is tailor-made for the spiral mixing operation of the lower mixing assembly, allowing the spiral blades of the lower mixing body to fully expand, ensuring that the dust achieves full-area deep mixing and directional conveying within the chamber. As the cross-sectional area of ​​the first mixing chamber gradually decreases towards the second mixing chamber, after the inert dust has completed its initial enhanced mixing in the first mixing chamber, it will move towards the second mixing chamber along the gradually decreasing cross-sectional area of ​​the chamber under its own gravity and the push of the upper mixing component. The gradual structure can avoid the material diversion and retention problems that are prone to occur in traditional equal cross-sectional area chambers, ensuring that the dust can enter the second mixing chamber in a concentrated and stable manner, reducing the accumulation of material at the junction of the two chambers, and ensuring the continuity of transmission.

[0013] In one embodiment, an opening and closing component is further included. This component is disposed on the mixing shell assembly, with a portion located within the discharge chamber. The opening and closing component controls the connection or disconnection between the second mixing chamber and the discharge chamber. By placing the opening and closing component on the mixing shell assembly, it can flexibly control the on / off state of the second mixing chamber and the discharge chamber according to production needs, achieving on-demand start / stop of inert dust conveying. When the inert dust in the second mixing chamber has completed deep mixing by the lower mixing assembly, the opening and closing component can promptly switch to the "connected" state, allowing the uniformly mixed inert dust to smoothly enter the discharge chamber and then be conveyed out by the feeding shell. If the dust in the second mixing chamber has not yet completed deep mixing, or if the subsequent proportioning process does not require inert dust supply, the opening and closing component switches to the "disconnected" state to prevent substandard dust from prematurely entering the discharge chamber, and simultaneously prevents dust in the discharge chamber from flowing back into the second mixing chamber, causing secondary pollution or uneven mixing.

[0014] The second aspect of this application discloses an automatic powder spraying device, which includes the above-described stirring and mixing structure.

[0015] The second aspect disclosed above discloses an automatic powder spraying device, which integrates the above-mentioned mixing structure into the automatic powder spraying device. Through its efficient mixing and precise control capabilities for inert dust, it can be deeply adapted to the automated operation logic of the automatic powder spraying device, thereby improving the device performance from three dimensions: powder spraying quality, safety control, and operating efficiency. It becomes the core support for the automatic powder spraying device to achieve safe, efficient, and stable operation. Attached Figure Description

[0016] Figure 1 A first perspective view of the mixing structure;

[0017] Figure 2 This is a second perspective view of the mixing structure;

[0018] Figure 3 This is a first perspective view of the stirring shell assembly;

[0019] Figure 4 This is a second perspective view of the stirring shell assembly;

[0020] Figure 5 This is a first cross-sectional view of the stirring and mixing structure;

[0021] Figure 6 This is a second cross-sectional view of the stirring and mixing structure;

[0022] Figure 7 This is a first perspective view of the stirring device;

[0023] Figure 8 This is a second perspective view of the stirring device;

[0024] Figure 9 This is a third perspective view of the stirring device;

[0025] Figure 10 This is the fourth perspective view of the stirring device;

[0026] Figure 11 This is a 3D view of an automatic powder spraying device.

[0027] The correspondence between the reference numerals and the component names is as follows:

[0028] 1. Housing assembly;

[0029] 2. Stirring shell assembly, 21. First stirring shell, 22. Second stirring shell, 201. First stirring chamber, 202. Second stirring chamber;

[0030] 3. Feed housing, 301 feed inlet, 302 transition cavity;

[0031] 4. Stirring device; 41. Mounting housing; 42. Stirring power assembly; 421. First stirring motor; 422. Second stirring motor; 423. First rotary connector; 424. Second rotary connector; 43. Upper stirring assembly; 431. First upper stirring component; 4311. First fixing component; 4312. First stirring component; 432. Second upper stirring component; 4321. Second fixing component; 4322. Second extension component; 4323. Second stirring component; 44. Lower stirring assembly; 441. Rotating shaft; 442. Lower stirring body.

[0032] 5. Feeding housing; 501. Discharge chamber;

[0033] 6. Opening and closing components. Detailed Implementation

[0034] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0036] The mixing structure and automatic powder spraying device of some embodiments of the present invention are described below with reference to the accompanying drawings.

[0037] Example 1

[0038] like Figures 1 to 11As shown, this embodiment discloses a mixing structure, including: a shell assembly 1; a mixing shell assembly 2, which is disposed on the shell assembly 1 and has a first mixing chamber 201 and a second mixing chamber 202; a feeding shell 3, which is disposed on the mixing shell assembly 2 and has a feeding port 301 and a transition chamber 302, wherein the number of feeding ports 301 is multiple; a mixing device 4, part of which is disposed on the feeding shell 3 and passes through the transition chamber 302, the first mixing chamber 201 and the second mixing chamber 202 in sequence; and a feeding shell 5, which is disposed on the shell assembly 1 and has a discharging chamber 501, wherein the multiple feeding ports 301, the transition chamber 302, the first mixing chamber 201, the second mixing chamber 202 and the discharging chamber 501 are connected in sequence.

[0039] This application discloses a mixing structure for an automatic powder spraying device. This mixing structure, with its scientific component layout and collaborative design, demonstrates significant advantages in the treatment of inert dust and the prevention and control of flammable and explosive dust risks, providing key technical support for efficient and safe production in various industries. By providing a first mixing chamber 201 and a second mixing chamber 202, along with a through-type mixing device 4, a progressive processing flow of premixing and in-depth mixing is constructed. During feeding, inert dust enters the transition chamber 302 through multiple feed inlets 301. At this stage, the mixing device 4 first performs preliminary premixing to avoid uneven mixing caused by dust accumulation. Subsequently, the dust sequentially enters the first mixing chamber 201 and the second mixing chamber 202. Under the continuous action of the mixing device 4, the mixing path and contact time of the dust within the chambers are extended, effectively breaking the agglomeration of inert dust and ensuring that the input inert dust is fully and uniformly mixed. This solves the mixing dead zone problem that easily occurs in traditional mixing structures, laying a uniform foundation for subsequent control of flammable and explosive dust concentration. Meanwhile, the transition chamber 302 of the feed housing 3 is sequentially connected to the first stirring chamber 201, the second stirring chamber 202, and the discharge chamber 501 of the feeding housing 5, forming a closed and orderly material transmission channel to prevent dust from escaping or leaking during transmission and reduce the possibility of abnormal fluctuations in dust concentration in the environment.

[0040] like Figure 5 and Figure 6As shown, in addition to the features of the above embodiments, this embodiment further defines: the stirring device 4 includes a mounting housing 41, a stirring power assembly 42, an upper stirring assembly 43, and a lower stirring assembly 44. The mounting housing 41 is disposed on the feeding housing 3. The stirring power assembly 42 is disposed on the mounting housing 41. A portion of the stirring power assembly 42 passes through the transition cavity 302 and is located in the first stirring cavity 201. The upper stirring assembly 43 is disposed on the stirring power assembly 42. A portion of the upper stirring assembly 43 is located in the transition cavity 302, and the remaining portion of the upper stirring assembly 43 is located in the first stirring cavity 201. The lower stirring assembly 44 is disposed on the stirring power assembly 42. A portion of the lower stirring assembly 44 passes through the first stirring cavity 201, and the remaining portion of the lower stirring assembly 44 is located in the second stirring cavity 202. By precisely coordinating the mounting housing 41, the stirring power assembly 42, the upper stirring assembly 43, and the lower stirring assembly 44, the stirring device 4 forms an integrated working mechanism of "power drive - segmented stirring - progressive transmission," providing core power and efficient stirring support for the mixing and processing of inert dust in different cavities. The mounting housing 41 serves as the basic load-bearing structure, securely mounted on the feed housing 3, providing a stable mounting platform for the stirring power assembly 42 and preventing vibrations generated during power operation from affecting the overall structural stability. The stirring power assembly 42, as the core driving force source, is mounted on the mounting housing 41 and partially extends through the transition cavity 302 into the first stirring chamber 201, providing continuous and stable power output to support the operation of the upper stirring assembly 43 and the lower stirring assembly 44. The upper stirring assembly 43 is mounted on the stirring power assembly 42, with part of it located in the transition chamber 302 and the remainder in the first stirring chamber 201. In the transition chamber 302, the newly entered inert dust can be initially dispersed and pre-stirred to prevent dust from accumulating and clogging below the feed inlet 301. At the same time, the pre-mixed dust is smoothly transported to the first stirring chamber 201. The part entering the first stirring chamber 201 further enhances the stirring effect, breaks up dust agglomerates, and lays the foundation for subsequent in-depth mixing. The lower stirring assembly 44 is also mounted on the stirring power assembly 42, with part of it passing through the first stirring chamber 201 and the remainder in the second stirring chamber 202. It can both receive the initially mixed dust in the first stirring chamber 201 and smoothly transport it to the second stirring chamber 202 through stirring, and deeply stir the dust in the second stirring chamber 202 to further improve the mixing uniformity and ensure that the final output inert dust mixture meets the standards.

[0041] like Figure 5 , Figure 6 and Figure 7As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the upper stirring assembly 43 includes a first upper stirring element 431 and a second upper stirring element 432. The first upper stirring element 431 is disposed on the stirring power assembly 42 and located in the transition chamber 302. The second upper stirring element 432 is disposed on the stirring power assembly 42, passes through the transition chamber 302, and extends into the first stirring chamber 201. By assembling the first upper stirring element 431 with the stirring power assembly 42, the assembly starts operating immediately upon the inert dust entering the transition chamber 302 from the feed inlet 301. This quickly disperses the clumps of dust formed by particle adsorption during the falling process, preventing dust from accumulating at the bottom of the transition chamber due to gravity, effectively preventing blockage of the feed channel, and ensuring the continuity of material transmission. The second upper agitator 432, which is distributed in a through-type manner, is also connected to the agitation power assembly 42. It receives the premixed dust from the transition chamber and strengthens the agitation of the dust by continuous rotation. This not only further breaks down the residual micro dust agglomerates, but also guides the dust to the bottom of the first agitation chamber with the driving force generated by the agitation. This ensures a precise connection for the lower agitation assembly 44 to transport the dust to the second agitation chamber 202 for deep mixing, and avoids the dust from accumulating inside the first agitation chamber.

[0042] like Figure 5 , Figure 6 and Figure 9As shown, in addition to the features of the above embodiments, this embodiment further defines: the first upper stirring member 431 includes a first fixing member 4311 and a first stirring member 4312. The first fixing member 4311 is disposed on the stirring power assembly 42, and the first stirring member 4312 is disposed on the first fixing member 4311 and extends obliquely in a direction away from the first fixing member 4311. By tightly disposing the first fixing member 4311 on the stirring power assembly 42, on the one hand, the first stirring member 4312 can be firmly fixed on the stirring power assembly, ensuring that the first stirring member will not loosen or shift due to dust impact or its own centrifugal force during high-speed stirring, thus ensuring the stability and safety of the entire assembly operation; on the other hand, it provides a reliable force transmission path for the first stirring member, enabling the torque output by the stirring power assembly to be efficiently transmitted to the first stirring member, so that the first stirring member obtains continuous and stable rotational power, avoiding the decrease in stirring efficiency due to poor power transmission, and providing a stable power foundation for subsequent dust treatment. Meanwhile, the integrated design of the first fixing component 4311 and the first stirring component 4312 completely eliminates the connection gaps and assembly errors between the fixing component and the stirring component in traditional split assembly, making them form a complete and more rigid overall structure. During high-speed stirring, the first stirring component 4312 will be subjected to the impact of inert dust and the centrifugal force generated by its own rotation. The integrated structure can evenly distribute these forces to the entire first stirring component, avoiding the problems of loosening, displacement or even breakage caused by insufficient strength of the connection parts in the split design.

[0043] like Figure 5 , Figure 6 and Figure 9As shown, in addition to the features of the above embodiments, this embodiment further defines: the second upper stirring member 432 includes a second fixing member 4321, a second extension member 4322, and a second stirring member 4323. The second fixing member 4321 is disposed on the stirring power assembly 42, passes through the transition cavity 302 and extends into the first stirring cavity 201. The second extension member 4322 is disposed on the second fixing member 4321 and extends obliquely in a direction away from the second fixing member 4321. The second extension member 4322 is located in the first stirring cavity 201. The second stirring member 4323 is disposed on the second extension member 4322 and is located in the first stirring cavity 201. The stirring shell assembly 2 includes a first stirring shell 21, and the second stirring member 4323 is parallel to the inner surface of the first stirring shell 21. By mounting the second fixing member 4321 on the stirring power assembly 42 and extending it through the transition cavity 302 to the first stirring cavity 201, it can stably receive the torque output by the stirring power assembly, stably transmit power to the second extension member 4322 and the second stirring member 4323, ensure that the three operate synchronously, and avoid loosening or delay during power transmission. On the other hand, its through-type structure provides a stable mounting carrier for the second extension member and the second stirring member. The second extension member 4322 is mounted on the second fixing member 4321 and extends obliquely away from the fixing member, while being completely within the first stirring cavity 201, expanding the contact range with the dust and continuously breaking up the residual clumps in the premixed dust, laying the foundation for the deep mixing of the second stirring member 4323. The second agitator 4323 is installed on the second extension 4322 and located in the first mixing chamber 201. More importantly, its design, which is parallel to the inner side of the first mixing shell 21, allows the second agitator 4323 to closely follow the inner wall of the first mixing shell 21, completely eliminating the dead corners between the agitator and the inner wall of the chamber, ensuring that the dust on the side walls and corners of the first mixing chamber 201 is fully agitated. This avoids uneven mixing caused by long-term accumulation of local dust, resulting in more uniform dust mixing throughout the first mixing chamber 201. The second fixing member 4321, the second extension 4322, and the second agitator 4323 are integrally formed, completely eliminating the connection gaps, bolt holes, or welding points between components in traditional split assemblies. This makes the second fixing member, the second extension, and the second agitator form a complete and extremely rigid integral structure, ensuring that the second upper agitator 432 can operate stably during the mixing process.

[0044] like Figure 5 , Figure 6 and Figure 10As shown, in addition to the features of the above embodiments, this embodiment further defines that: the lower stirring assembly 44 includes a rotating shaft 441 and a lower stirring body 442. The rotating shaft 441 is disposed on the stirring power assembly 42. The rotating shaft 441 passes through the first stirring chamber 201 and extends into the second stirring chamber 202. The rotating shaft 441 extends along the length direction of the second stirring chamber 202. The lower stirring body 442 is disposed on the rotating shaft 441. The lower stirring body 442 is spirally distributed around the rotating shaft 441 along the length direction of the rotating shaft 441. The lower stirring body 442 is located in the second stirring chamber 202. By mounting the rotating shaft 441 on the stirring power assembly 42 and extending it through the first stirring chamber 201 to the second stirring chamber 202, and extending it along the length of the second stirring chamber 202, the power can be efficiently and synchronously transmitted to the lower stirring body 442. This ensures that the lower stirring body 442 operates stably with the rotating shaft 441, avoiding loosening or speed fluctuations during power transmission, and providing a continuous and stable power foundation for subsequent spiral stirring and material conveying. On the other hand, the structure extending along the length of the second stirring chamber 202 allows the rotating shaft 441 to cover the entire space of the second stirring chamber 202, creating conditions for the lower stirring body 442 to be distributed along its length, ensuring that the stirring action can penetrate the entire length of the second stirring chamber 202, and avoiding local stirring blind spots caused by insufficient shaft length. The lower stirring body 442 is spirally distributed along the length of the rotation axis 441, which can form a multi-dimensional stirring effect on the dust in the second stirring chamber 202. The spiral blades can not only break up the small clumps remaining in the dust, but also drive the dust to tumble up and down and convect left and right through rotation, so that the dust in different areas can fully collide and merge, achieving deep and uniform mixing of inert dust, solving the problem of distinct mixing layers and insufficient uniformity that is easy to occur in traditional straight blade stirring. Moreover, the spirally distributed lower stirring body can generate thrust along the length of the second stirring chamber 202, continuously pushing the dust to move towards the discharge end of the second stirring chamber 202, thus avoiding the accumulation of dust in the second stirring chamber 202.

[0045] like Figure 5 , Figure 6 and Figure 7As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the stirring power assembly includes a first stirring motor 421, a second stirring motor 422, a first rotary connector 423, and a second rotary connector 424. Both the first stirring motor 421 and the second stirring motor 422 are mounted on the mounting housing 41. The first rotary connector 423 is mounted on the first stirring motor 421 and is drive-connected to it. The second rotary connector 424 is mounted on the second stirring motor 422 and is drive-connected to it. The upper stirring component 43 is mounted on the first rotary connector 423, and the lower stirring component 44 is mounted on the second rotary connector 424. By mounting both the first stirring motor 421 and the second stirring motor 422 on the mounting housing 41, a stable dual-power output base is formed. The output speed and torque can be independently adjusted according to the different stirring requirements of the cavities where the upper stirring component 43 and the lower stirring component 44 are located, avoiding the limitation of a single motor drive that cannot simultaneously accommodate the characteristics of different stirring stages. The upper stirring assembly 43 needs to disperse and premix the dust in the transition chamber 302 and the first stirring chamber 201, and stir the powder towards the center. The first rotary connector 423 efficiently transmits the power of the first stirring motor 421 to the upper stirring assembly 43, which can provide a suitable stirring intensity to ensure that the dust is quickly dispersed and stirred towards the center, laying the foundation for subsequent conveying. The lower stirring assembly 44 undertakes the task of deep mixing and material conveying in the second stirring chamber 202. The second rotary connector 424 stably transmits the power of the second stirring motor 422 to the lower stirring assembly 44, and can output matching power parameters to ensure the uniformity of mixing and smooth conveying.

[0046] like Figure 2 , Figure 3 and Figure 4As shown, in addition to the features of the above embodiments, this embodiment further defines: the stirring shell assembly 2 includes a first stirring shell 21 and a second stirring shell 22. The first stirring shell 21 is disposed on the outer shell assembly 1, the feed shell 3 is disposed on one end of the first stirring shell 21, and the second stirring shell 22 is disposed on the first stirring shell 21 and located at the end away from the feed shell 3. The first stirring shell 21 has a first stirring chamber 201, and the second stirring shell 22 has a second stirring chamber 202. The cross-sectional area of ​​the first stirring chamber 201 gradually decreases along the direction close to the second stirring chamber 202. By disposing of the first stirring shell 21 on the outer shell assembly 1 as a basic supporting cavity, a stable installation platform is provided for the feed shell 3, ensuring that the feed inlet 301 and the transition chamber 302 can accurately connect with the first stirring chamber 201, and ensuring a smooth connection of inert dust from feeding to initial stirring. The second mixing shell 22 is mounted on the first mixing shell 21. The second mixing chamber 202 inside is custom-designed for the spiral mixing operation of the lower mixing assembly 44, allowing the spiral blades of the lower mixing body 442 to fully expand, ensuring that the dust achieves full-area deep mixing and directional conveying within the chamber. As the cross-sectional area of ​​the first mixing chamber 201 gradually decreases towards the second mixing chamber 202, after the inert dust has undergone preliminary enhanced mixing in the first mixing chamber 201, it will move towards the second mixing chamber 202 under its own gravity and the push of the upper mixing assembly 431. The gradual change in cross-sectional area avoids the material diversion and retention problems that are prone to occur in traditional equal-cross-sectional area chambers, ensuring that the dust can enter the second mixing chamber 202 in a concentrated and stable manner, reducing material accumulation at the junction of the two chambers and ensuring continuous transmission.

[0047] like Figure 2 and Figure 5 As shown, in addition to the features of the above embodiments, this embodiment further includes an opening and closing component 6, which is disposed on the stirring shell assembly 2. A portion of the opening and closing component 6 is located in the discharge chamber 501. The opening and closing component 6 can control the connection or disconnection between the second stirring chamber 202 and the discharge chamber 501. By disposing of the opening and closing component 6 on the stirring shell assembly 2, the opening and closing component 6 can flexibly control the on / off state of the second stirring chamber 202 and the discharge chamber 501 according to production needs, realizing the on-demand start and stop of inert dust conveying. When the inert dust in the second mixing chamber 202 is deeply mixed by the lower mixing component 44, the opening and closing component 6 can switch to the "connected" state in time, so that the uniformly mixed inert dust can smoothly enter the discharge chamber 501 and then be conveyed out by the feeding shell 5. If the dust in the second mixing chamber 202 has not been deeply mixed, or the subsequent proportioning process does not require the supply of inert dust, the opening and closing component will switch to the "blocking" state to prevent substandard dust from entering the discharge chamber 501 in advance, and at the same time prevent the dust in the discharge chamber 501 from flowing back to the second mixing chamber 202 to cause secondary pollution or uneven mixing.

[0048] Example 2

[0049] like Figures 1 to 11 As shown in the figure, this embodiment discloses an automatic powder spraying device, including the above-mentioned stirring and mixing structure.

[0050] The second aspect of this application discloses an automatic powder spraying device, which integrates the above-mentioned stirring and mixing structure into the automatic powder spraying device. Through its efficient mixing and precise control capabilities for inert dust, it can be deeply adapted to the automated operation logic of the automatic powder spraying device, thereby improving the device performance from three dimensions: powder spraying quality, safety control, and operating efficiency. This becomes the core support for the automatic powder spraying device to achieve safe, efficient, and stable operation.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A stirring and mixing structure, characterized in that, The stirring and mixing structure includes: Housing assembly (1); A stirring shell assembly (2) is disposed on the outer shell assembly (1), and the stirring shell assembly (2) is provided with a first stirring chamber (201) and a second stirring chamber (202); Feeding shell (3), the feeding shell (3) is disposed on the stirring shell assembly (2), the feeding shell (3) is provided with a feed inlet (301) and a transition cavity (302), and the number of feed inlets (301) is multiple; A stirring device (4) is provided on the feed housing (3), and the part of the stirring device (4) passes through the transition chamber (302), the first stirring chamber (201) and the second stirring chamber (202) in sequence; The feeding housing (5) is disposed on the outer shell assembly (1). The feeding housing (5) is provided with a discharge chamber (501). Multiple feed inlets (301), transition chambers (302), first stirring chamber (201), second stirring chamber (202) and discharge chamber (501) are connected in sequence.

2. The mixing structure according to claim 1, characterized in that, The stirring device (4) includes a mounting housing (41), a stirring power assembly (42), an upper stirring assembly (43), and a lower stirring assembly (44). The mounting housing (41) is disposed on the feed housing (3). The stirring power assembly (42) is disposed on the mounting housing (41). A portion of the stirring power assembly (42) passes through the transition cavity (302) and is located in the first stirring cavity (201). The upper stirring assembly (43) is disposed on the stirring power assembly (42). A portion of the upper stirring assembly (43) is located in the transition cavity (302), and the remaining portion of the upper stirring assembly (43) is located in the first stirring cavity (201). The lower stirring assembly (44) is disposed on the stirring power assembly (42). The lower stirring assembly (44) passes through the first stirring cavity (201) and extends into the second stirring cavity (202).

3. The mixing structure according to claim 2, characterized in that, The upper stirring assembly (43) includes a first upper stirring element (431) and a second upper stirring element (432). The first upper stirring element (431) is disposed on the stirring power assembly (42) and located in the transition cavity (302). The second upper stirring element (432) is disposed on the stirring power assembly (42) and passes through the transition cavity (302) and extends into the first stirring cavity (201).

4. The stirring and mixing structure according to claim 3, characterized in that, The first upper stirring member (431) includes a first fixing member (4311) and a first stirring member (4312). The first fixing member (4311) is disposed on the stirring power assembly (42), and the first stirring member (4312) is disposed on the first fixing member (4311) and extends obliquely in a direction away from the first fixing member (4311).

5. The stirring and mixing structure according to claim 3, characterized in that, The second upper stirring member (432) includes a second fixing member (4321), a second extension member (4322), and a second stirring member (4323). The second fixing member (4321) is disposed on the stirring power assembly (42). The second fixing member (4321) passes through the transition cavity (302) and extends into the first stirring cavity (201). The second extension member (4322) is disposed on the second fixing member (4321) and extends obliquely in a direction away from the second fixing member (4321). The second extension member (4322) is located in the first stirring cavity (201). The second stirring member (4323) is disposed on the second extension member (4322) and is located in the first stirring cavity (201). The stirring shell assembly (2) includes a first stirring shell (21). The second stirring member (4323) is parallel to the inner side surface of the first stirring shell (21).

6. The mixing structure according to claim 2, characterized in that, The lower stirring assembly (44) includes a rotating shaft (441) and a lower stirring body (442). The rotating shaft (441) is disposed on the stirring power assembly (42). The rotating shaft (441) passes through the first stirring chamber (201) and extends into the second stirring chamber (202). The rotating shaft (441) extends along the length direction of the second stirring chamber (202). The lower stirring body (442) is disposed on the rotating shaft (441). The lower stirring body (442) is spirally distributed around the rotating shaft (441) along the length direction of the rotating shaft (441). The lower stirring body (442) is located in the second stirring chamber (202).

7. The stirring and mixing structure according to claim 2, characterized in that, The stirring power assembly (42) includes a first stirring motor (421), a second stirring motor (422), a first rotating connector (423), and a second rotating connector (424). The first stirring motor (421) and the second stirring motor (422) are both mounted on the mounting housing (41). The first rotating connector (423) is mounted on the first stirring motor (421) and is drivenly connected to the first stirring motor (421). The second rotating connector (424) is mounted on the second stirring motor (422) and is drivenly connected to the second stirring motor (422). The upper stirring assembly (43) is mounted on the first rotating connector (423), and the lower stirring assembly (44) is mounted on the second rotating connector (424).

8. The mixing structure according to claim 1, characterized in that, The stirring shell assembly (2) includes a first stirring shell (21) and a second stirring shell (22). The first stirring shell (21) is disposed on the outer shell assembly (1). The feed shell (3) is disposed on one end of the first stirring shell (21). The second stirring shell (22) is disposed on the first stirring shell (21) and located at the end away from the feed shell (3). The first stirring shell (21) is provided with a first stirring chamber (201). The second stirring shell (22) is provided with a second stirring chamber (202). The cross-sectional area of ​​the first stirring chamber (201) gradually decreases along the direction close to the second stirring chamber (202).

9. The mixing structure according to claim 1, characterized in that, It also includes an opening and closing component (6), which is disposed on the stirring shell assembly (2). A portion of the opening and closing component (6) is located in the discharge chamber (501). The opening and closing component (6) can control the connection or blockage between the second stirring chamber (202) and the discharge chamber (501).

10. An automatic powder spraying device, characterized in that, The automatic powder spraying device includes: The stirring and mixing structure according to any one of claims 1 to 9.

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