Cold mixing device for multiple materials

Abstract

The application provides a cold mixing device for multiple materials, which comprises a base, a mixing tank, a stirring assembly, a refrigeration module and a pressure conveyor. The mixing tank is arranged on the base and has a mixing cavity. The top end is provided with an exhaust structure, and the mixing tank is provided with a cooling assembly. The stirring assembly is rotatably arranged on the mixing tank and is in power connection with a driving module arranged on the base. The stirring assembly is provided with a plurality of air injection nozzles. The refrigeration module is in communication with the stirring assembly through a sealing connection structure. The pressure conveyor is arranged between the refrigeration module and the refrigeration module and the sealing connection structure, and can pressure-convey cooling gas to the air injection nozzles. The cold mixing device for multiple materials can improve the cooling efficiency of the materials and has high practicability.

Description

Technical Field

[0001] This invention belongs to the field of mixing equipment technology, and specifically relates to a cold mixing device for multiple materials. Background Technology

[0002] A mixing device is a mechanical device that uses physical methods such as mechanical force and gravity to uniformly mix two or more materials. For the preparation of wood-plastic composite skirting boards, resin, wood powder or bamboo powder, and small components such as stabilizers and modifiers need to be placed in a mixing device for uniform mixing beforehand. Because stabilizers are involved, the mixing temperature needs to be maintained to ensure that the stabilizers reach their melting point, typically 120°C. After hot mixing, a cold mixing device is needed to cool the hot-mixed materials. After cooling, heat-sensitive raw materials need to be added and mixed again; this is called cold mixing.

[0003] In existing technologies, a cooling step is required before cold mixing. This is typically achieved by stirring the materials using an agitator within the cold mixing equipment, while a cooling module is also installed on the equipment. However, while this method can achieve cooling, its efficiency is low, and the heat in the materials cannot be dissipated in time, significantly reducing the efficiency of cold mixing and making it impractical. Summary of the Invention

[0004] This invention provides a cold mixing device for multiple materials, which aims to solve the problem of poor practicality caused by the low efficiency of existing cold mixing equipment.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a cold mixing device for multiple materials, including a base, a mixing tank, a stirring assembly, a refrigeration module, and a pressure conveyor;

[0006] The mixing tank is mounted on the base and has a mixing chamber; it has an exhaust structure at the top and a cooling assembly on the mixing tank.

[0007] The stirring assembly is rotatably mounted on the mixing tank and is poweredly connected to the drive module mounted on the base; the stirring assembly is provided with a plurality of jet nozzles;

[0008] The refrigeration module is connected to the stirring assembly via a sealed connection structure;

[0009] The pressure conveyor is disposed between the refrigeration module and the sealing connection structure, and is used to pressurize and convey cooling gas to each of the jet nozzles;

[0010] As the stirring assembly agitates the hot material in the mixing chamber, each jet nozzle injects high-pressure cooling gas into the material, so that the heat in the material is discharged in a timely manner through the exhaust structure.

[0011] In one possible implementation, the mixing tank includes a tank body and a sealing cap;

[0012] The tank body is fixedly mounted on the base; the bottom of the tank body is provided with a discharge port communicating with the receiving cavity;

[0013] The sealing cap is detachably connected to the tank body, and the sealing cap and the tank body enclose the mixing chamber; the sealing cap is provided with a feed inlet communicating with the mixing chamber.

[0014] In one possible implementation, the exhaust structure includes an exhaust pipe and a filter screen;

[0015] The exhaust pipe is disposed on the sealing cover and communicates with the mixing chamber;

[0016] The filter screen is detachably connected to the exhaust pipe and is used to filter the mixture of gas and powder passing through the cylinder of the exhaust pipe, so as to intercept the powder material moving with the airflow.

[0017] In one possible implementation, the cooling assembly includes a jacket and a heat exchanger;

[0018] The jacket is disposed on the outer wall of the tank body;

[0019] The heat exchanger has a heat medium channel and a refrigerant channel. The refrigerant channel of the heat exchanger is connected to the jacket and is used to provide refrigerant to the jacket.

[0020] In one possible implementation, the stirring assembly includes a rotating shaft, a support assembly, and stirring blades;

[0021] The rotating shaft is rotatably mounted on the mixing tank, and the axis of rotation is set in the horizontal direction. The rotating shaft has a shaft cavity inside, and a connection port communicating with the shaft cavity is provided at one end of the rotating shaft. The other end of the rotating shaft is poweredly connected to the drive module.

[0022] The support group is provided in at least two, and each support group is arranged circumferentially along the axis of the rotation shaft. Each support group includes two support tubes, which are arranged at intervals along the axial direction of the rotation shaft. One end of each support tube is supported and connected to the rotation shaft, and the other end extends radially along the rotation shaft. Each support tube has a cavity communicating with the shaft cavity.

[0023] The stirring blade is provided in at least two parts, and each stirring blade is arranged in a one-to-one correspondence with each support group. Each stirring blade is arranged along the axis of the rotation shaft, and its two ends are fixedly connected to the extended ends of the corresponding two support tubes. Each stirring blade has an air chamber, and the air chamber is connected to the cavity of the corresponding two support tubes. Each stirring blade is provided with air nozzles.

[0024] In one possible implementation, each of the stirring blades has two parallel plates; the corresponding air nozzles are distributed on the two plates of the stirring blades.

[0025] In one possible implementation, any surface of the stirring blade is arranged at an angle to the radial direction of the rotation axis.

[0026] In one possible implementation, each of the support tubes includes a fixed tube, an auxiliary tube, and a connector;

[0027] The fixed tube has one end fixedly connected to the rotating shaft, and the other end extends radially along the rotating shaft;

[0028] The auxiliary tube has one end for fixed connection to the stirring blade, and the other end corresponds to the fixed tube radially along the rotation axis.

[0029] The connector has two threaded ends, which are respectively threaded to the protruding end of the fixed tube and the other end of the auxiliary tube. The connector, the fixed tube and the auxiliary tube are combined to form the cavity.

[0030] In one possible implementation, the sealed connection structure includes a fixed bearing, an air supply pipe, and a bearing isolator;

[0031] The fixed bearing is located at the connection port on the rotating shaft and has an outer ring and an inner ring. The outer ring of the fixed bearing is interference-fitted with the inner wall of the shaft cavity.

[0032] The gas supply pipe is coaxially arranged with the rotating shaft, and one end of the gas supply pipe is connected to the inner ring of the fixed bearing;

[0033] The bearing isolator is disposed at the connecting pipe port on the rotating shaft and spaced apart from the fixed bearing. The bearing isolator has a moving ring and a stationary ring. The moving ring of the bearing isolator is interference-fitted with the inner wall of the shaft cavity, and the stationary ring of the bearing isolator is interference-fitted with the gas supply pipe, for sealing the gas supply pipe and the rotating shaft.

[0034] In one possible implementation, the refrigeration module includes a nitrogen generator and a refrigerator;

[0035] The nitrogen generator has a nitrogen outlet;

[0036] The cooler has an air inlet and an air outlet. The air inlet of the cooler is connected to the nitrogen outlet on the nitrogen generator, and the air outlet of the cooler is connected to the other end of the gas supply pipe.

[0037] The pressure conveyor is installed on the gas pipeline.

[0038] In this implementation, the cooling component installed on the mixing tank ensures a cold mixing process, while the stirring component agitates the material to ensure uniform cooling and maintain the mixing effect after other materials are added. The refrigeration module generates cooling gas, which, under the action of a press, is forced into the material by the stirring component. This cooling gas not only lowers the temperature but also ensures that the heat in the material is quickly dissipated through the exhaust structure, improving the cooling efficiency and demonstrating strong practicality. Attached Figure Description

[0039] Figure 1 A schematic diagram of the structure of a cold mixing device for multiple materials provided in an embodiment of the present invention (with hidden refrigeration module);

[0040] Figure 2 This is a schematic front view of a cold mixing device for multiple materials provided in an embodiment of the present invention.

[0041] Figure 3 A schematic diagram of the mixing tank structure (hidden sealing cover) of a cold mixing device for multiple materials provided in an embodiment of the present invention.

[0042] Figure 4 A schematic diagram of the stirring assembly structure of a cold mixing device for multiple materials provided in an embodiment of the present invention;

[0043] Figure 5 A top view (partial cross-sectional view) of the stirring assembly of a multi-material cold mixing device provided in an embodiment of the present invention.

[0044] Figure 6 A cross-sectional view of the stirring blades of a cold mixing device for multiple materials provided in an embodiment of the present invention;

[0045] Figure 7 A schematic diagram of the support pipe structure for a cold mixing device for multiple materials provided in an embodiment of the present invention;

[0046] Figure 8 A schematic diagram of the sealing connection structure in a cold mixing device for multiple materials provided in an embodiment of the present invention;

[0047] Explanation of reference numerals in the attached figures:

[0048] 10. Base;

[0049] 20. Mixing tank; 21. Tank body; 22. Sealing cover; 23. Inlet; 24. Outlet; 25. Exhaust structure; 251. Exhaust pipe; 252. Filter screen;

[0050] 30. Stirring assembly; 31. Rotating shaft; 32. Support tube; 321. Fixed tube; 322. Auxiliary tube; 323. Connecting joint; 33. Stirring blade; 34. Baffle; 35. Adjusting screw;

[0051] 40. Refrigeration module; 41. Nitrogen generator; 42. Refrigerator;

[0052] 50. Pressure conveyor;

[0053] 60. Cooling assembly; 61. Jacket;

[0054] 70. Driver module;

[0055] 80. Sealed connection structure; 81. Fixed bearing; 82. Gas pipeline; 83. Bearing isolator;

[0056] 90. Air valve. Detailed Implementation

[0057] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0058] Please refer to the following: Figure 1 and Figure 2 The present invention provides a cold mixing device for multiple materials. The cold mixing device for multiple materials includes a base 10, a mixing tank 20, a stirring assembly 30, a cooling module 40, and a pressure conveyor 50. The mixing tank 20 is mounted on the base 10 and has a mixing chamber. It has an exhaust structure 25 at its top and a cooling assembly 60 on the mixing tank 20. The stirring assembly 30 is rotatably mounted on the mixing tank 20 and is poweredly connected to a drive module 70 mounted on the base 10. The stirring assembly 30 has several nozzles 90. The cooling module 40 is connected to the stirring assembly 30 via a sealing connection structure 80. The pressure conveyor 50 is located between the cooling module 40 and the sealing connection structure 80, and is capable of pressurizing and conveying cooling gas to each nozzle 90.

[0059] As the stirring assembly 30 agitates the hot material in the mixing chamber, each jet nozzle 90 injects high-pressure cooling gas into the material. The cooling gas passes through the material, carrying away the heat in the material, and is promptly discharged through the exhaust structure 25.

[0060] In addition, the high-pressure cooling gas entering the material will also cause the material to tumble.

[0061] The cold mixing device for multiple materials provided in this embodiment, compared with the prior art, features a cooling component 60 mounted on the mixing tank 20 that ensures the cold mixing process, while the stirring component 30 agitates the materials to ensure uniform cooling and maintains the mixing effect after the addition of other materials. The refrigeration module 40 generates cooling gas, which, under the action of a press, is injected into the materials via the stirring component 30. This cooling gas not only lowers the temperature but also ensures that the heat in the materials is quickly dissipated through the exhaust structure 25, improving the cooling efficiency and enhancing practicality.

[0062] In this embodiment, the cooling gas mentioned is not necessarily below 0°C, but is only lower than the temperature of the material produced by the thermal mixing, and can be at room temperature.

[0063] Regarding valve 90, it is only opened under high pressure. Valve 90 is existing technology and will not be described in detail here.

[0064] Regarding the drive module 70, it can be a combination of a driver and a reducer. This technology is also existing technology and will not be described in detail here.

[0065] In some embodiments, the mixing tank 20 described above may be as follows: Figure 3 The structure shown. See also Figure 3 The mixing tank 20 includes a tank body 21 and a sealing cover 22. The tank body 21 is fixed on the base 10. The bottom of the tank body 21 has a discharge port 24 communicating with the receiving cavity. The sealing cover 22 is detachably connected to the tank body 21, and the sealing cover 22 and the tank body 21 enclose a mixing cavity. The sealing cover 22 has a feed port 23 communicating with the mixing cavity.

[0066] The combination of the sealing cap 22 and the tank body 21 ensures that the mixing chamber can be opened, thereby facilitating maintenance of the internal stirring assembly 30 after prolonged use. Furthermore, this structure also facilitates the installation of components located within it. Preferably, the sealing cap 22 and the tank body 21 are bolted together.

[0067] In some embodiments, the exhaust structure 25 described above may employ, for example... Figure 2 The structure shown. See also Figure 2 The exhaust structure 25 includes an exhaust pipe 251 and a filter screen 252. The exhaust pipe 251 is disposed on the sealing cover 22 and communicates with the mixing chamber. The filter screen 252 is detachably connected to the exhaust pipe 251 and can filter the mixture of gas and powder passing through the cylinder of the exhaust pipe 251 to intercept the powder material moving with the airflow.

[0068] The filter screen 252 is mainly used to prevent dusty materials from being carried away by the airflow, thus preventing material loss. The detachable connection between the filter screen 252 and the exhaust pipe 251 ensures that the filter screen 252 can be replaced.

[0069] As a preferred embodiment, a sliding channel is provided on the exhaust pipe 251, and the filter screen 252 can be a structure in which the filter screen is installed inside the sliding frame. The slider slides directly into the exhaust pipe 251 through the sliding channel. This structure is the prior art and is a commonly used installation method by those skilled in the art, and will not be described in detail here.

[0070] In some embodiments, the cooling component 60 may employ, for example... Figure 3 The structure shown. See also Figure 3 The cooling assembly 60 includes a jacket 61 and a heat exchanger. The jacket 61 is disposed on the outer wall of the tank body 21. The heat exchanger has a heat medium passage and a refrigerant passage, and the refrigerant passage of the heat exchanger is connected to the jacket 61, enabling it to supply refrigerant to the jacket 61.

[0071] The jacket 61 contains refrigerant, which ensures heat exchange with the side wall of the tank 21 and thus ensures the cooling effect. The heat exchanger can be a plate heat exchanger with fixed tubes 321 to ensure the temperature of the refrigerant in the jacket 61. The refrigerant can be water.

[0072] In some embodiments, the stirring assembly 30 described above may employ, for example... Figures 4 to 7 The structure shown. See also Figures 4 to 7 The stirring assembly 30 includes a rotating shaft 31, a support group, and stirring blades 33. The rotating shaft 31 is rotatably mounted on the mixing tank 20, and its axis of rotation is horizontal. The rotating shaft 31 has a shaft cavity, and one end of the rotating shaft 31 has a connection port communicating with the shaft cavity. The other end of the rotating shaft 31 is poweredly connected to the drive module 70. At least two support groups are provided, and each support group is arranged annularly at intervals along the axis of the rotating shaft 31. Each support group includes two support tubes 32, which are spaced apart along the axis of the rotating shaft 31. One end of each support tube 32 is supported and connected to the rotating shaft 31, and the other end extends radially along the rotating shaft 31. Each support tube 32 has a cavity communicating with the shaft cavity. At least two stirring blades 33 are provided, each stirring blade 33 corresponding to one of the support groups. Each stirring blade 33 is arranged along the axis of the rotation shaft 31, and its two ends are fixedly connected to the extended ends of the corresponding two support tubes 32. Each stirring blade 33 has an air chamber, which is connected to the cavity of the corresponding two support tubes 32. Each stirring blade 33 is evenly distributed with air nozzles 90.

[0073] The shaft cavity of the rotating shaft 31 is connected to the cavity of each support tube 32, and each cavity is connected to the air cavity in the corresponding stirring blade 33. This ensures the passage of high-pressure cooling gas in the airflow, and in turn, ensures that each stirring blade 33 can release cooling gas during the stirring process, which can effectively ensure the cooling efficiency of the material and has strong practicality.

[0074] In some embodiments, the stirring blade 33 may be as follows: Figure 6 The structure shown. See also Figure 6 Each stirring blade 33 has two parallel plates. Corresponding air nozzles 90 are distributed on the two plates of the stirring blade 33. This structure can increase the flow rate of cooling gas into the material and increase the area covered, thereby ensuring that the heat in the material can be quickly discharged.

[0075] In some embodiments, the stirring blade 33 may be as follows: Figure 4 The structure shown. See also Figure 4 The stirring blade 33 is set at an angle to the radial direction of the rotating shaft 31.

[0076] First, this structure ensures the agitation of the material, thereby guaranteeing the mixing effect. Second, this structure ensures that the air nozzles 90, arranged radially outward along the rotation axis 31, can blow away material adhering to the inner wall of the mixing chamber during the later material discharge process, thus ensuring the smooth discharge of the material.

[0077] In some embodiments, the support tube 32 may be adopted as follows: Figure 7 The structure shown. See also Figure 7 Each support tube 32 includes a fixed tube 321, an auxiliary tube 322, and a connector 323. One end of the fixed tube 321 is fixedly connected to the rotating shaft 31, and the other end extends radially along the rotating shaft 31. One end of the auxiliary tube 322 is fixedly connected to the stirring blade 33, and the other end corresponds to the fixed tube 321 radially along the rotating shaft 31. The connector 323 has two threaded connection ends, which are threadedly connected to the extended end of the fixed tube 321 and the other end of the auxiliary tube 322, respectively. The connector 323, the fixed tube 321, and the auxiliary tube 322 are combined to form a cavity.

[0078] The fixed tube 321 is directly fixed on the rotating shaft 31, while the auxiliary tube 322 is directly fixedly connected to the stirring blade 33. The connecting joint 323 facilitates the detachable connection of the fixed tube 321 and the auxiliary tube 322. Since the interval between the two fixed tubes 321 is fixed, and since the fixed connection between the auxiliary tube 322 and the stirring blade 33 is involved, this structure facilitates the installation of the stirring blade 33. It is only necessary to connect the two fixed ends and the two auxiliary tubes 322 through the rotating head.

[0079] In this embodiment, the connector 323 may have a hexagonal structure to ensure the wrench can be installed. Correspondingly, the fixed tube 321 and the auxiliary tube 322 are provided with internal threads that are compatible with the connector 323. The connector 323 is existing technology and will not be described in detail here.

[0080] In some embodiments, the sealing connection structure 80 described above can be as follows: Figure 8 The structure shown. See also Figure 8 The sealing connection structure 80 includes a fixed bearing 81, an air supply pipe 82, and a bearing isolator 83. The fixed bearing 81 is located at the connection port on the rotating shaft 31 and has an outer ring and an inner ring. The outer ring of the fixed bearing 81 is interference-fitted with the inner wall of the shaft cavity. The air supply pipe 82 is coaxially arranged with the rotating shaft 31, and one end of the air supply pipe 82 is connected to the inner ring of the fixed bearing 81. The bearing isolator 83 is located at the connection port on the rotating shaft 31 and is spaced apart from the fixed bearing 81. The bearing isolator 83 has a rotating ring and a stationary ring. The rotating ring of the bearing isolator 83 is interference-fitted with the inner wall of the shaft cavity, and the stationary ring of the bearing isolator 83 is interference-fitted with the air supply pipe 82, thus sealing the air supply pipe 82 and the rotating shaft 31.

[0081] Because the rotation of the rotating shaft 31 is involved, while the gas supply pipe 82 is stationary, a fixed bearing 81 is required to connect the two in a rolling manner. However, since high-pressure gas is involved, a bearing isolator 83 is provided to ensure the connection between the two is sealed and to ensure the effective delivery of cooling gas.

[0082] In some embodiments, the cooling module 40 described above may employ, for example... Figure 2 The structure shown. See also Figure 2 The refrigeration module 40 includes a nitrogen generator 41 and a cooler 42. The nitrogen generator 41 has a nitrogen outlet. The cooler 42 has an inlet and an outlet. The inlet of the cooler 42 is connected to the nitrogen outlet on the nitrogen generator 41, and the outlet of the cooler 42 is connected to the other end of the gas supply pipe 82.

[0083] The pressure conveyor 50 is installed on the gas pipeline 82.

[0084] Nitrogen has a protective effect, preventing materials from oxidizing, while the cooler 42 ensures that the nitrogen is cooled after passing through, thus ensuring the cooling effect of the materials.

[0085] To ensure that nitrogen can be supplied to meet demand, a nitrogen storage tank can also be installed between the nitrogen generator 41 and the cooler 42.

[0086] In addition, since the cooling gas can be at room temperature, the cooler 42 can be selectively turned on and off.

[0087] In some embodiments, participation is possible Figure 6The air chamber of the stirring blade 33 has two parallel inner sidewalls, and each air nozzle 90 is evenly distributed and corresponding to the two inner sidewalls. That is, the inner wall surface of the air chamber has air holes for the air nozzles 90 to communicate with. The stirring assembly 30 also includes a baffle 34 and an adjusting screw 35. There are two baffles 34, each corresponding to one of the two inner sidewalls, and the two baffles 34 are respectively abutting against the two inner sidewalls. Each baffle 34 has a vent hole corresponding to the air nozzle 90 on the inner sidewall. As the baffle 34 slides along the stirring blade 33, it can make each vent hole correspond to each air nozzle 90, and it can also block each air nozzle 90. Two adjusting screws 35 are respectively set at both ends of the stirring blade 33 and are rotatably connected to the support tube. One end of each adjusting screw 35 extends through the support tube 32, and the other end is threadedly connected to the nut part set on the corresponding baffle 34. By rotating the adjusting screw 35, the baffle 34 can be driven to move in the sliding groove set in the air chamber to ensure the opening and closing control of each group of air nozzles.

[0088] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cold mixing device for multiple materials, characterized in that, Includes a base, mixing tank, stirring assembly, refrigeration module, and pressure conveyor; The mixing tank is mounted on the base and has a mixing chamber; it has an exhaust structure at the top and a cooling assembly on the mixing tank. The stirring assembly is rotatably mounted on the mixing tank and is poweredly connected to the drive module mounted on the base; the stirring assembly is provided with a plurality of jet nozzles; The refrigeration module is connected to the stirring assembly via a sealed connection structure; The pressure conveyor is disposed between the refrigeration module and the sealing connection structure, and is used to pressurize and convey cooling gas to each of the jet nozzles; As the stirring assembly agitates the hot material in the mixing chamber, each of the jet nozzles injects high-pressure cooling gas into the material, so that the heat in the material can be discharged in time through the exhaust structure. The stirring assembly includes a rotating shaft, a support assembly, and stirring blades; The rotating shaft is rotatably mounted on the mixing tank, and the axis of rotation is set in the horizontal direction. The rotating shaft has a shaft cavity inside, and a connection port communicating with the shaft cavity is provided at one end of the rotating shaft. The other end of the rotating shaft is poweredly connected to the drive module. The support group is provided in at least two, and each support group is arranged circumferentially along the axis of the rotation shaft. Each support group includes two support tubes, which are arranged at intervals along the axial direction of the rotation shaft. One end of each support tube is supported and connected to the rotation shaft, and the other end extends radially along the rotation shaft. Each support tube has a cavity communicating with the shaft cavity. The stirring blade is provided in at least two parts, and each stirring blade is arranged in a one-to-one correspondence with each of the support groups. Each stirring blade is arranged along the axis of the rotation shaft, and its two ends are fixedly connected to the extended ends of the corresponding two support tubes. Each stirring blade has an air chamber, and the air chamber is connected to the cavity of the corresponding two support tubes. Each stirring blade is provided with air nozzles. The air chamber of the stirring blade has two parallel inner sidewalls, and each air nozzle is evenly distributed and correspondingly arranged on the two inner sidewalls. The stirring assembly further includes: Two baffles are provided, each baffle corresponding to one of the two inner sidewalls, and each baffle abuts against the corresponding inner sidewall; each baffle is provided with a vent hole corresponding to the air nozzle on the corresponding inner sidewall; Multiple adjusting screws are provided, each adjusting screw is respectively set at both ends of each stirring blade and is rotatably connected to the corresponding support tube. One end of each adjusting screw passes through the corresponding support tube and extends out, and the other end is threadedly connected to the nut part on the corresponding baffle. The inner wall of the air chamber is provided with an air hole connected to an air supply nozzle.

2. The cold mixing apparatus for multiple materials as described in claim 1, characterized in that, The mixing tank includes a tank body and a sealing cap; The tank body is fixedly mounted on the base; the bottom of the tank body is provided with a discharge port communicating with the mixing chamber; The sealing cap is detachably connected to the tank body, and the sealing cap and the tank body enclose the mixing chamber; the sealing cap is provided with a feed inlet communicating with the mixing chamber.

3. The cold mixing apparatus for multiple materials as described in claim 2, characterized in that, The exhaust structure includes an exhaust pipe and a filter screen; The exhaust pipe is disposed on the sealing cover and communicates with the mixing chamber; The filter screen is detachably connected to the exhaust pipe and is used to filter the mixture of gas and powder passing through the cylinder of the exhaust pipe, so as to intercept the powder material moving with the airflow.

4. The cold mixing apparatus for multiple materials as described in claim 2, characterized in that, The cooling assembly includes a jacket and a heat exchanger; The jacket is disposed on the outer wall of the tank body; The heat exchanger has a heat medium channel and a refrigerant channel. The refrigerant channel of the heat exchanger is connected to the jacket and is used to provide refrigerant to the jacket.

5. The cold mixing apparatus for multiple materials as described in claim 1, characterized in that, Each of the stirring blades has two parallel plates; the corresponding air nozzles are distributed on the two plates of the stirring blades.

6. The cold mixing apparatus for multiple materials as described in claim 5, characterized in that, The stirring blade has any surface that forms an angle with the radial direction of the rotating shaft.

7. The cold mixing apparatus for multiple materials as described in claim 1, characterized in that, Each of the aforementioned support tubes includes a fixed tube, an auxiliary tube, and a connector; The fixed tube has one end fixedly connected to the rotating shaft, and the other end extends radially along the rotating shaft; The auxiliary tube has one end for fixed connection to the stirring blade, and the other end corresponds to the fixed tube radially along the rotation axis. The connector has two threaded ends, which are respectively threaded to the protruding end of the fixed tube and the other end of the auxiliary tube. The connector, the fixed tube and the auxiliary tube are combined to form the cavity.

8. The cold mixing apparatus for multiple materials as described in claim 1, characterized in that, The sealed connection structure includes a fixed bearing, an air supply pipe, and a bearing isolator. The fixed bearing is located at the connection port on the rotating shaft and has an outer ring and an inner ring. The outer ring of the fixed bearing is interference-fitted with the inner wall of the shaft cavity. The gas supply pipe is coaxially arranged with the rotating shaft, and one end of the gas supply pipe is connected to the inner ring of the fixed bearing; The bearing isolator is disposed at the connecting pipe port on the rotating shaft and spaced apart from the fixed bearing. The bearing isolator has a moving ring and a stationary ring. The moving ring of the bearing isolator is interference-fitted with the inner wall of the shaft cavity, and the stationary ring of the bearing isolator is interference-fitted with the gas supply pipe, for sealing the gas supply pipe and the rotating shaft.

9. The cold mixing apparatus for multiple materials as described in claim 8, characterized in that, The refrigeration module includes a nitrogen generator and a refrigeration unit; The nitrogen generator has a nitrogen outlet; The cooler has an air inlet and an air outlet. The air inlet of the cooler is connected to the nitrogen outlet on the nitrogen generator, and the air outlet of the cooler is connected to the other end of the gas supply pipe. The pressure conveyor is installed on the gas pipeline.

Images