A pneumatic mixer capable of in-situ cleaning

Abstract

This utility model discloses an in-situ cleaning pneumatic mixer, relating to the technical field of powder mixing equipment. It includes a pneumatic mixer body, a cleaning mechanism, and a rotary backflushing mechanism. The pneumatic mixer body has an inner cylindrical cavity and a filter cavity, with a cylindrical filter installed inside the filter cavity. The cleaning mechanism includes at least one cleaning component, with a rotating cleaning ball nozzle located below the cylindrical filter. The rotary backflushing mechanism has a rotating inverted U-shaped frame, coaxially sleeved on the outside of the cylindrical filter. The inverted U-shaped frame has a cleaning channel with inclined elongated holes corresponding to the side walls of the cylindrical filter, and a top outlet hole can also be opened as needed. Both the side outlet hole and the top outlet hole communicate with the cleaning channel. Air or liquid can be introduced into the cleaning channel; when the medium is discharged, the inverted U-shaped frame is rotated in the opposite direction by the included angle, thus cleaning and drying the equipment and blowing off dust from the cylindrical filter. This allows for in-situ cleaning and drying, reducing manual labor intensity and improving the cleaning effect on the filter.

Description

Technical Field

[0001] This utility model relates to the field of powder mixing equipment technology, and in particular to a pneumatic mixer that can be cleaned in place. Background Technology

[0002] A pneumatic mixer is a device that utilizes the principles of airflow dynamics to suspend, collide, and stir materials using high-speed airflow, thereby achieving uniform mixing. Its core function is to efficiently process powders or granular materials of different particle sizes, densities, and shapes, and it is suitable for scenarios requiring high mixing uniformity and cleanliness.

[0003] The existing pneumatic mixers do not have an internal cleaning mechanism, requiring manual cleaning after the machine is stopped, which is a laborious task. Furthermore, manual cleaning, combined with the existing back-flushing device (which is currently an air tank with a blowpipe structure, with one blowpipe for each filter; during back-flushing, the blowpipe sprays a conical airflow to back-flush the filter), has the problem of not being able to completely remove wet powder and dust from the filter. Over time, the material tends to stick to the filter, resulting in a smaller filter area, increased resistance, and impaired material conveying efficiency. Utility Model Content

[0004] The purpose of this invention is to provide an in-situ cleaning pneumatic mixer to solve the problems existing in the prior art. It can achieve in-situ cleaning and drying without the need for external cleaning equipment, thereby reducing manual labor intensity and improving the cleaning effect on filters.

[0005] To achieve the above objectives, this utility model provides the following solution: This utility model provides a pneumatic mixer capable of in-situ cleaning, comprising a pneumatic mixer body, a cleaning mechanism, and a rotary backflushing mechanism; the pneumatic mixer body has an inner cavity and a filter cavity; the filter cavity is located above and communicates with the inner cavity of the cylinder; a downward-facing cylindrical filter is disposed within the filter cavity; the cleaning mechanism includes at least one cleaning component, the cleaning component having a rotating cleaning ball nozzle located within the inner cavity of the cylinder, the rotating cleaning ball nozzle being located below the bottom opening of the cylindrical filter, and the rotating cleaning ball nozzle being capable of 360° rotation. The cleaning fluid is sprayed upwards; the rotary backflushing mechanism has an inverted U-shaped frame that can rotate around a first axis. The inverted U-shaped frame is coaxially sleeved on the outside of the cylindrical filter, and the first axis is coaxial with the axis of the cylindrical filter; the inverted U-shaped frame has a cleaning channel inside, and the inverted U-shaped frame has inclined side outlet holes on the side wall corresponding to the cylindrical filter. The side outlet holes are connected to the cleaning channel; gas or liquid can be introduced into the cleaning channel; when the medium in the cleaning channel is discharged from the side outlet holes, it can push the inverted U-shaped frame to rotate around the first axis in the opposite direction.

[0006] Preferably, the cleaning assembly includes a pneumatic quick-install butterfly valve, a cleaning pipe, and the rotating cleaning ball nozzle; the pneumatic quick-install butterfly valve is located outside the gas mixer body, one end of the cleaning pipe is connected to and communicates with the pneumatic quick-install butterfly valve, the cleaning pipe is fixed on the gas mixer body, and the other end of the cleaning pipe extends into the inner cavity of the cylinder, and the rotating cleaning ball nozzle is located at the end of the cleaning pipe located in the inner cavity of the cylinder.

[0007] Preferably, a top extension tube is fixedly installed at the upper end of the inverted U-shaped frame; the lower end of the top extension tube communicates with the cleaning channel; a connecting plate is fixedly installed inside the filter chamber; a through mounting hole is provided on the connecting plate; the top extension tube passes through the mounting hole, and a mounting assembly is fixedly installed on the connecting plate, the top extension tube being rotatably mounted on the mounting assembly; the top of the mounting assembly has a connection interface, which communicates with the upper opening of the top extension tube, and the connection interface is used to introduce a medium.

[0008] Preferably, the pneumatic mixer body includes a chamber, an exhaust device, a feed inlet, an annular air manifold, a mixing head device, a pneumatic actuator, and multiple air control valves; the inner cavity of the chamber includes the inner cavity of the cylindrical body and the filter chamber; the exhaust device is disposed at the top of the chamber and is used for vacuuming and venting the inner cavity of the chamber; the feed inlet is fixedly disposed on the side wall of the chamber; multiple air control valves are fixedly disposed at the bottom of the circumferential side wall of the chamber, and the air outlet of each air control valve communicates with the inner cavity of the cylindrical body of the chamber; the annular air manifold is fixedly disposed... On the outer side wall of the bottom of the silo, the annular air bag is filled with gas and is connected to the air inlet of each of the air control valves; the mixing head device is located at the bottom of the circumferential side wall of the silo, and in the vertical direction, the mixing head device is lower than each of the air control valves, the air inlet of the mixing head device is connected to the annular air bag, and the air outlet of the mixing head device is connected to the inner cavity of the cylinder; the pneumatic actuator is located outside the lower discharge port of the silo, and the pneumatic actuator is used to control the opening and closing of the valve plate at the lower discharge port of the silo.

[0009] Preferably, the mounting assembly includes a connecting joint and a bearing assembly; the connecting joint is fixedly disposed on the connecting plate, the connecting joint has an inner through hole, the top of the inner through hole forms the connecting interface; the lower end of the inner through hole corresponds to and communicates with the mounting hole on the connecting plate, and the bearing assembly is disposed in the inner through hole; the upper end of the top extension tube passes through the mounting hole and is connected to the bearing assembly, and the bearing assembly enables the top extension tube to rotate around the first axis.

[0010] Preferably, the bearing assembly includes a bearing annular bottom cover, a bearing sleeve, and a locking nut; the top extension tube has a threaded section, a bearing through section, and a limiting section from top to bottom, the outer diameter of the limiting section is larger than the outer diameter of the bearing through section, and the outer diameter of the bearing through section is not smaller than the outer diameter of the threaded section; the bearing sleeve is fitted onto the bearing through section, and the threaded section is threadedly connected to the locking nut; the bottom of the connecting joint is provided with a support groove, the support groove communicates with the inner through hole, and the inner diameter of the support groove is larger than the inner diameter of the inner through hole; a convex ring is fixedly provided on the outer side wall of the bearing sleeve; the convex ring is rotatably disposed in the support groove, the bearing annular bottom cover is fixedly disposed on the connecting plate, and the bearing annular base is located below the convex ring; rolling elements are provided between the bearing annular base and the convex ring, and between the convex ring and the corresponding upper side wall of the support groove, the rolling elements enabling the convex ring to rotate relative to the connecting joint and the bearing annular base around the first axis.

[0011] Preferably, a limiting hole is provided on the upper end of the connecting plate corresponding to the inner through hole, and the bearing annular base is fixedly disposed in the limiting hole.

[0012] Preferably, the connection interface is detachably connected to an external hexagonal elbow joint; one end of the external hexagonal elbow joint is provided with an external thread, and the upper opening of the connection interface is provided with an internal thread; the external thread and the internal thread are threadedly connected.

[0013] Preferably, an annular support plate is fixed on the inner wall of the filter chamber, and a connecting plate is fixedly disposed above the annular support plate, wherein the outer diameter of the connecting plate is larger than the inner diameter of the annular support plate.

[0014] Preferably, the annular receiving plate has multiple mounting screw holes, and the connecting plate has multiple mounting through holes, each corresponding to one of the mounting screw holes; a connecting bolt is provided in each mounting through hole, and the connecting bolt is threadedly connected to the mounting screw hole.

[0015] The present invention achieves the following technical advantages over the prior art: This utility model provides an in-situ cleaning pneumatic mixer that sprays cleaning fluid 360° through rotating cleaning ball nozzles. Simultaneously, a U-shaped frame, also connected to the cleaning fluid, creates a three-dimensional cleaning system for the cylindrical filter. The reaction force of the cleaning fluid after exiting through the side outlet of the U-shaped frame drives its rotation, achieving a comprehensive rinse and all-around cleaning of the filter. After cleaning, the cleaning channel of the U-shaped frame switches to an air source, using compressed gas to create an air knife effect to blow away any remaining cleaning fluid from the filter. The entire operation allows for in-situ cleaning and drying without the need for external cleaning equipment, reducing manual labor and improving filter cleaning efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the overall structure of the pneumatic mixer capable of in-situ cleaning provided by this utility model; Figure 2 A schematic diagram of the filter chamber portion in the in-situ cleanable pneumatic mixer provided by this utility model; Figure 3 A schematic diagram of the cleaning mechanism in the pneumatic mixer that can be cleaned in place according to this utility model; Figure 4 for Figure 2 A magnified view of a portion of point A in the middle.

[0018] In the picture: 10-Pneumatic mixer body; 11-Exhaust device; 12-Cylindrical filter; 13-Filter chamber; 14-Air control valve; 15-Annular air tank; 16-Mixing head device; 17-Pneumatic actuator; 18-Feed inlet; 20-Cleaning mechanism; 21-Pneumatic quick-install butterfly valve; 22-Cleaning pipe; 23-Rotary cleaning ball nozzle; 30-Rotary backflushing mechanism; 31-Inverted U-shaped frame; 32-Top extension tube; 33-Connecting joint; 34-External hexagonal elbow joint; 35-Locking nut; 36-Bearing sleeve; 37-Bearing annular bottom cover; 38-Stainless steel ball. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] The purpose of this invention is to provide an in-situ cleaning pneumatic mixer to solve the problems existing in the prior art. It can achieve in-situ cleaning and drying without the need for external cleaning equipment, thereby reducing manual labor intensity and improving the cleaning effect on filters.

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1 This embodiment provides a pneumatic mixer capable of in-situ cleaning, such as... Figures 1-4 As shown, the system includes a pneumatic mixer body 10, a cleaning mechanism 20, and a rotary backflushing mechanism 30. The pneumatic mixer body 10 has an inner cavity and a filter chamber 13. The filter chamber 13 is located above and communicates with the inner cavity of the cylinder. A cylindrical filter 12 with its opening facing downwards is disposed inside the filter chamber 13. The cleaning mechanism 20 includes at least one cleaning component, which has a rotating cleaning ball nozzle 23 located in the inner cavity of the cylinder. The rotating cleaning ball nozzle 23 is located below the bottom opening of the cylindrical filter 12 and can rotate 360° to spray cleaning liquid upwards. The rotary backflushing mechanism 30 has an inverted U-shaped frame 31 that can rotate around a first axis. The inverted U-shaped frame 31 is coaxially sleeved on the outside of the cylindrical filter 12, and the first axis is coaxial with the axis of the cylindrical filter 12. The frame 31 has a cleaning channel inside, and the inverted U-shaped frame 31 has inclined side outlet holes (which are elongated holes with the medium blowing direction at an angle to the radial direction of the cylindrical filter 12, the width of the elongated holes is 0.6 mm, and the length direction is parallel to the axis of the cylindrical filter 12) on the side wall corresponding to the cylindrical filter 12. The top of the inverted U-shaped frame 31 can also have a top outlet hole as needed, which is used for cleaning and drying the top. Due to the angle, it can push the inverted U-shaped frame 31 to rotate in the opposite direction, blowing off the dust on the cylindrical filter 12. The side outlet holes are connected to the cleaning channel. Gas or liquid can be introduced into the cleaning channel. When the medium in the cleaning channel is discharged from the side outlet holes, it can push the inverted U-shaped frame 31 to rotate around the first axis in the opposite direction.

[0023] The cleaning fluid is sprayed 360° by rotating the cleaning ball nozzle 23, and the inverted U-shaped frame 31 is also connected to the cleaning fluid, thus creating a three-dimensional cleaning system for the cylindrical filter 12. The reaction force of the cleaning fluid after being sprayed out of the side outlet of the inverted U-shaped frame 31 can drive the rotation of the inverted U-shaped frame 31, thereby achieving a comprehensive rinsing of the cylindrical filter 12 and achieving a comprehensive cleaning effect. After cleaning, the cleaning channel of the inverted U-shaped frame 31 is switched to an air source, and the compressed gas forms an air knife effect to blow away the residual cleaning fluid on the cylindrical filter 12. The entire operation can achieve in-situ cleaning and drying without the need for external cleaning equipment, reducing manual labor intensity and improving the cleaning effect of the filter.

[0024] The following are the settings instructions for the pneumatic mixer body 10: Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 As shown, the pneumatic mixer body includes a chamber, an exhaust device 11, a feed inlet 18, an annular air manifold 15, a mixing head device 16, a pneumatic actuator 17, and multiple air control valves 14; the inner cavity of the chamber includes a cylindrical inner cavity and a filter chamber; the exhaust device 11 is located at the top of the chamber and is used for vacuuming and venting the inner cavity of the chamber (e.g., Figure 1 (The left side is for exhaust, and the right side is for the vacuum source connector); the feed inlet 18 is fixedly installed on the side wall of the silo; multiple air control valves 14 are fixedly installed at the bottom of the circumferential side wall of the silo, and the outlet of each air control valve 14 is connected to the inner cavity of the silo cylinder; the annular air bag 15 is fixedly installed on the outer side wall of the bottom of the silo, the annular air bag 15 is filled with gas, and the annular air bag 15 is connected to the inlet of each air control valve 14; the mixing head device 16 is installed at the bottom of the circumferential side wall of the silo, and in the vertical direction, the mixing head device 16 is lower than each air control valve 14, the inlet of the mixing head device 16 is connected to the annular air bag 15, and the outlet of the mixing head device 16 is connected to the inner cavity of the cylinder (the mixing head device 16 is composed of multiple air control valves, and each air control valve is evenly distributed around the axis of the silo); the pneumatic actuator 17 is installed outside the lower discharge port of the silo, and the pneumatic actuator 17 is used to control the opening and closing of the valve plate (the valve plate of the discharge butterfly valve) at the lower discharge port of the silo.

[0025] Specifically, apart from the cleaning mechanism 20 and the rotary backflushing mechanism 30, the other settings on the pneumatic mixer body 10 are the same as existing equipment, and will not be described in detail. For example, the pneumatic mixer body 10 has a feed butterfly valve (at the feed inlet 18) installed on its cylinder, and an annular air manifold 15, a mixing head device 16, and a discharge butterfly valve (at the lower discharge outlet of the hopper) installed at the lower end of the cylinder. A control cabinet is installed at the front end of the pneumatic mixer body 10. Its operation involves connecting the vacuum source, compressed air source, cleaning water pipe, and material pipe to the corresponding connection points after the equipment is in place, turning on the control system power, and clicking the feed start button on the control box. Under the action of negative pressure conveying, the material enters the hopper of the pneumatic mixer body 10, and the conveying process... In this process, the feeding time and backflushing time are set by the program, and intermittent feeding is adopted to prevent the cylindrical filter 12 in the filter chamber 13 from being blocked and to reduce the feeding speed. After a batch of material is conveyed, the feeding stop button on the control box is clicked, and then the mixing start button is clicked. Compressed air enters the mixer cylinder through the mold nozzle on the mixing head. The airflow drives the material to rise spirally along a certain track through the mold nozzle. The material forms a fluidized mixing state in the inner cavity of the cylinder. Through pulse-like repeated actions, the material can be fully, quickly and evenly mixed. After the material is mixed, the discharge butterfly valve is opened to convey the material to the next stage. After the material is discharged, the pneumatic quick-install butterfly valve 21 at the cleaning mechanism 20 is opened, and the water source enters the cleaning mechanism 20. Under the action of the reaction rotating cleaning ball nozzle 23 of the cleaning mechanism 20, a fan-shaped liquid surface is sprayed onto the inner cavity surface of the cylinder. In conjunction with the same cleaning liquid (such as water) introduced into the rotating backflushing mechanism 30, the cylindrical filter 12 is completely cleaned under the rotation of the inverted U-shaped frame 31, thereby achieving the purpose of in-situ cleaning.

[0026] The following are the relevant settings for the cleaning mechanism 20: Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 and Figure 4 As shown, the cleaning assembly includes a pneumatic quick-install butterfly valve 21, a cleaning pipe 22, and a rotating cleaning ball nozzle 23. The pneumatic quick-install butterfly valve 21 is located outside the gas mixer body (fixed outside it). One end of the cleaning pipe 22 is connected to and communicates with the pneumatic quick-install butterfly valve 21. The cleaning pipe 22 is fixed on the gas mixer body 10, and the other end of the cleaning pipe 22 extends into the inner cavity of the cylinder. The rotating cleaning ball nozzle 23 is located at the end of the cleaning pipe 22 located in the inner cavity of the cylinder.

[0027] Specifically, the rotating cleaning ball nozzle 23 is an existing spraying component capable of 360° rotating and spraying cleaning fluid, which will not be elaborated further here. Any nozzle structure capable of spraying cleaning fluid upwards 360° is acceptable. Opening the pneumatic quick-release butterfly valve 21 allows the cleaning water to flow along the cleaning pipe 22 to the rotating cleaning ball nozzle 23. The rotating cleaning ball nozzle 23 has angled grooves, through which the cleaning water flows into the inner cavity of the cylinder. Due to its angle, the cleaning ball on the rotating cleaning ball nozzle 23 rotates under the influence of the water flow, thus achieving 360° rotation to complete the online cleaning function.

[0028] Specifically, the pneumatic quick-install butterfly valve 21 is connected to the cleaning pipe 22 using heavy-duty clamps and heavy-duty sealing rings.

[0029] The following are the relevant settings for the rotary backflushing mechanism 30: Among the optional solutions in this embodiment, the more preferred one is as follows: Figures 1-3 As shown, a top extension tube 32 is fixedly installed at the upper end of the inverted U-shaped frame 31; the lower end of the top extension tube 32 is connected to the cleaning channel; a connecting plate is fixedly installed inside the filter chamber 13; a through mounting hole is provided on the connecting plate; the top extension tube 32 passes through the mounting hole, and a mounting assembly is fixedly installed on the connecting plate, with the top extension tube 32 rotatably mounted on the mounting assembly; the top of the mounting assembly has a connection interface, which can communicate with the upper opening of the top extension tube 32, and the connection interface is used to introduce a medium (cleaning liquid during cleaning, and compressed gas during drying).

[0030] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 2 and Figure 3 As shown, the mounting assembly includes a connecting joint 33 and a bearing assembly; the connecting joint 33 is fixedly mounted on the connecting plate, and the connecting joint 33 has an inner through hole, the top of which forms a connection interface; the lower end of the inner through hole corresponds to and communicates with the mounting hole on the connecting plate, and the bearing assembly is disposed in the inner through hole; the upper end of the top extension tube 32 passes through the mounting hole and connects to the bearing assembly, and the bearing assembly enables the top extension tube 32 to rotate around the first axis.

[0031] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 3As shown, the bearing assembly includes a bearing annular bottom cover 37, a bearing sleeve 36, and a locking nut 35; the top extension tube 32 has a threaded section, a bearing through section, and a limiting section from top to bottom. The outer diameter of the limiting section is larger than the outer diameter of the bearing through section, and the outer diameter of the bearing through section is not smaller than the outer diameter of the threaded section; the bearing sleeve 36 is fitted onto the bearing through section, and the threaded section is threadedly connected to the locking nut 35; the bottom of the connecting joint 33 is provided with a support groove, which communicates with the inner through hole, and the inner diameter of the support groove is larger than the inner diameter of the inner through hole; the outer wall of the bearing sleeve 36 is fixed with... A convex ring is provided; the convex ring is rotatably disposed in the support groove, the bearing annular bottom cover 37 is fixedly disposed on the connecting plate, and the bearing annular base is located below the convex ring; rolling elements (all stainless steel balls 38) are provided between the bearing annular base and the convex ring and between the convex ring and the corresponding upper side wall of the support groove. Arc-shaped grooves are provided on their respective corresponding surfaces between the bearing annular base and the convex ring and between the convex ring and the corresponding upper side wall of the support groove for holding each stainless steel ball 38. The rolling elements enable the convex ring to rotate relative to the connecting joint 33 and the bearing annular base around the first axis.

[0032] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 3 As shown, a limiting hole is provided at the upper end of the connecting plate corresponding to the inner through hole, and the bearing annular base is fixedly installed in the limiting hole.

[0033] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 3 As shown, an external hexagonal elbow joint 34 is detachably connected to the connection interface.

[0034] In the optional solutions of this embodiment, it is more preferred that one end of the external hexagonal elbow joint 34 is provided with an external thread, and the upper opening of the connection interface is provided with an internal thread; the external thread and the internal thread are threadedly connected.

[0035] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 2 and Figure 3 As shown, an annular support plate is fixed on the inner wall of the filter chamber 13, and a connecting plate is fixedly installed above the annular support plate, with the outer diameter of the connecting plate being larger than the inner diameter of the annular support plate.

[0036] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 2 As shown, the annular receiving plate has multiple mounting screw holes, and the connecting plate has multiple mounting through holes, which correspond one-to-one with the mounting screw holes; a connecting bolt is installed in the mounting through hole, and the connecting bolt is threadedly connected to the mounting screw hole.

[0037] Specifically, the installation of the rotary backflushing mechanism 30 is as follows: the bearing annular bottom cover 37 is fixedly installed in the limiting hole of the connecting plate; stainless steel balls 38 are placed in the arc-shaped groove on the bearing annular bottom cover 37; the bearing sleeve 36 is placed above the bearing annular bottom cover 37, and stainless steel balls 38 are also placed in the arc-shaped groove above the convex ring of the bearing sleeve 36; the top extension tube 32 is inserted into the bearing sleeve 36, and its upper end protruding part is threadedly connected to the threaded section of the top extension tube 32 with a locking nut 35; the connecting joint 33 is covered on top, with the part protruding from the connecting plate located in the inner through hole; and the connecting joint 33 is fixed to the connecting plate with bolts and other connecting parts, and an external hexagonal elbow joint 34 is installed at the top of the inner through hole.

[0038] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An in-situ cleanable pneumatic mixer characterized by: Includes the pneumatic mixer body, cleaning mechanism, and rotary backflushing mechanism; The pneumatic mixer body has a cylindrical inner cavity and a filter cavity; the filter cavity is located above the cylindrical inner cavity and communicates with the cylindrical inner cavity; a cylindrical filter with its opening facing downward is provided in the filter cavity; The cleaning mechanism includes at least one cleaning component, which has a rotating cleaning ball nozzle located in the inner cavity of the cylindrical filter. The rotating cleaning ball nozzle is located below the bottom opening of the cylindrical filter and is capable of rotating 360° and spraying cleaning liquid upward. The rotary backflushing mechanism has an inverted U-shaped frame that can rotate around a first axis. The inverted U-shaped frame is coaxially sleeved on the outside of the cylindrical filter, and the first axis is coaxial with the axis of the cylindrical filter. The inverted U-shaped frame has a cleaning channel inside, and each side wall of the inverted U-shaped frame corresponding to the cylindrical filter has an inclined side outlet hole, which communicates with the cleaning channel. Gas or liquid can be introduced into the cleaning channel. When the medium in the cleaning channel is discharged through the side outlet hole, it can push the inverted U-shaped frame to rotate around the first axis in the opposite direction.

2. The in-situ cleanable pneumatic mixer of claim 1, wherein: The cleaning assembly includes a pneumatic quick-install butterfly valve, a cleaning pipe, and the rotating cleaning ball nozzle; The pneumatic quick-install butterfly valve is located outside the gas mixer body. One end of the cleaning pipe is connected to and communicates with the pneumatic quick-install butterfly valve. The cleaning pipe is fixed on the gas mixer body, and the other end of the cleaning pipe extends into the inner cavity of the cylinder. The rotating cleaning ball nozzle is located at one end of the cleaning pipe located in the inner cavity of the cylinder.

3. The in-situ cleanable pneumatic mixer of claim 1, wherein: The upper end of the inverted U-shaped frame is fixedly provided with a top extension tube; the lower end of the top extension tube is connected to the cleaning channel. A connecting plate is fixedly installed inside the filter chamber; the connecting plate is provided with through mounting holes. The top extension tube passes through the mounting hole, and a mounting assembly is fixedly mounted on the connecting plate. The top extension tube is rotatably mounted on the mounting assembly. The mounting assembly has a connection interface at the top, which can communicate with the upper opening of the top extension tube, and the connection interface is used to introduce a medium.

4. The in-situ cleanable pneumatic blender of claim 1, wherein: The pneumatic mixer body includes a chamber, a pump, a feed inlet, an annular air tank, a mixing head device, a pneumatic actuator, and multiple air control valves; The internal cavity of the chamber includes the internal cavity of the cylindrical shell and the filter cavity; The vacuum pump is located at the top of the chamber and is used for vacuuming and venting the internal cavity of the chamber. The feed inlet is fixedly installed on the side wall of the silo body; Multiple air control valves are fixedly installed at the bottom of the circumferential side wall of the chamber, and the air outlet of each air control valve is connected to the inner cavity of the cylindrical body of the chamber. The annular air bag is fixedly installed on the outer wall of the bottom of the chamber. The annular air bag is filled with gas and is connected to the air inlet of each of the gas control valves. The mixing head device is located at the bottom of the circumferential side wall of the chamber, and in the vertical direction, the mixing head device is lower than each of the air control valves. The air inlet of the mixing head device is connected to the annular air bag, and the air outlet of the mixing head device is connected to the inner cavity of the cylinder. The pneumatic actuator is located outside the lower discharge port of the silo body, and is used to control the opening and closing of the valve plate at the lower discharge port of the silo body.

5. The in-situ cleanable pneumatic mixer of claim 3, wherein: The mounting components include a connector and a bearing assembly; The connecting joint is fixedly mounted on the connecting plate. The connecting joint has an inner through hole, and the top of the inner through hole forms the connecting interface. The lower end of the inner through hole corresponds to and communicates with the mounting hole on the connecting plate. The bearing assembly is disposed in the inner through hole. The upper end of the top extension tube passes through the mounting hole and is connected to the bearing assembly. The bearing assembly enables the top extension tube to rotate around the first axis.

6. The in-situ cleanable pneumatic mixer of claim 5, wherein: The bearing assembly includes a bearing annular bottom cover, a bearing sleeve, and a locking nut; The top extension tube has a threaded section, a bearing through section and a limiting section in sequence from top to bottom. The outer diameter of the limiting section is larger than the outer diameter of the bearing through section, and the outer diameter of the bearing through section is not less than the outer diameter of the threaded section. The bearing sleeve is fitted on the bearing through section, and the threaded section is threadedly connected to the locking nut. The bottom of the connecting joint is provided with a support groove, which communicates with the inner through hole, and the inner diameter of the support groove is larger than the inner diameter of the inner through hole; a convex ring is fixedly provided on the outer side wall of the bearing sleeve; the convex ring is rotatably disposed in the support groove, the bearing annular bottom cover is fixedly disposed on the connecting plate, and the bearing annular base is located below the convex ring; rolling elements are provided between the bearing annular base and the convex ring, and between the convex ring and the corresponding upper side wall of the support groove, and the rolling elements enable the convex ring to rotate relative to the connecting joint and the bearing annular base around the first axis.

7. The in-situ cleanable pneumatic mixer of claim 6, wherein: The connecting plate is provided with a limiting hole at the upper end corresponding to the inner through hole, and the bearing annular base is fixedly installed in the limiting hole.

8. The in-situ cleanable pneumatic mixer of claim 3, wherein: The connection interface is detachably connected to an external hexagonal elbow joint; one end of the external hexagonal elbow joint is provided with an external thread, and the upper opening of the connection interface is provided with an internal thread; the external thread and the internal thread are threadedly connected.

9. The in-situ cleanable pneumatic mixer of claim 3, wherein: An annular support plate is fixed on the inner wall of the filter chamber, and a connecting plate is fixedly disposed above the annular support plate, wherein the outer diameter of the connecting plate is larger than the inner diameter of the annular support plate.

10. The pneumatic mixer capable of in-situ cleaning according to claim 9, characterized in that: The annular receiving plate has multiple mounting screw holes, and the connecting plate has multiple mounting through holes, each corresponding to one of the mounting screw holes; a connecting bolt is installed in each mounting through hole, and the connecting bolt is threadedly connected to the mounting screw hole.

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