Material mixing device
By using a rotatable stirring paddle and chopping knife in the material mixing device of the urea breath test diagnostic reagent, combined with the frequency converter motor drive, solid-liquid mixing is achieved, solving the problem of solid-liquid mixing difficulties in the prior art, and reducing labor and risk improve efficiency.
Patent Information
- Application Number
- CN202420213713.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-29
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-01-29
AI Technical Summary
In the prior art, the material mixing device used for urea breath test diagnostic reagents cannot achieve solid-liquid mixing, resulting in large labor volume of workers, high risk of sprinkling and leaking materials, and low efficiency.
A material mixing device is designed, including a rotatable mixing paddle and a chopping knife, which is driven by a variable frequency motor, which can realize the mixing of solid and liquid in a fixed material cauldron, and realize the raw and auxiliary materials by rotating the stirring paddle and chopping knife. Mix and crush, and add the slurry directly through the slurry port to reduce manual operation.
Solid-liquid mixing is achieved, manual labor volume and the risk of sprinkling and leaking materials are reduced, operating efficiency is improved, and the mixing uniformity is adjusted through a variable frequency motor, meeting the mixing uniformity requirements.
Smart Images
Figure CN222196757U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of material mixing, in particular to a material mixing device. Background Art
[0002] In the process of producing urea breath test diagnostic reagents, it is necessary to mix five raw materials and auxiliary materials, namely mannitol, citric acid, sodium citrate, carbon 13 urea, and steviol glycosides, and then the mixed powder is mixed with medicinal ethanol slurry to form a wet material. In the prior art, the mixing device used to mix the five raw materials and auxiliary materials is a two-dimensional rotary mixing device, and the mixing device achieves the mixing of the five raw materials and auxiliary materials by rotating up and down and left and right. This type of mixing device can only mix solid materials and cannot mix solids and liquids. Therefore, after the five raw materials and auxiliary materials are mixed, it is necessary to unload the mixed powder in the mixing device into a bag, and then the operator climbs up and pours the mixed powder in the bag into another mixing device to mix the mixed powder and slurry for solid-liquid mixing. Obviously, this method increases the workload of the operators, reduces the operating efficiency, and increases the risk of spilling and leaking during loading and unloading.
[0003] Therefore, how to reduce the workload of operators, reduce the risk of spilling and leaking materials, and improve operating efficiency is a key issue that technical personnel in this field need to solve urgently. Utility Model Content
[0004] In view of this, the purpose of the utility model is to reduce the workload of operators, reduce the risk of spilling and leaking materials, and improve operating efficiency.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A material mixing device, comprising:
[0007] A material crucible and a pot cover matched with the material crucible;
[0008] A stirring paddle rotatably disposed on the bottom wall of the material crucible, the stirring paddle comprising a stirring shaft and paddles connected to each other, the stirring shaft being arranged along the axial direction of the material crucible, the paddles being arranged along the radial direction of the stirring shaft, and the paddles being a plurality of paddles arranged around the stirring shaft;
[0009] A first motor, wherein the first motor is disposed below the material crucible, and the stirring shaft passes through the bottom wall of the material crucible and is connected to the motor shaft of the first motor;
[0010] A chopping knife rotatably disposed on the side wall of the material crucible, the chopping knife comprising a knife shaft and a blade connected to each other, the knife shaft being arranged perpendicular to the side wall of the material crucible, the blade being arranged along the radial direction of the knife shaft, and the number of the blades being multiple;
[0011] The second motor is arranged on the side of the material crucible, and the knife shaft passes through the side wall of the material crucible and is connected with the motor shaft of the second motor.
[0012] Preferably, the pot mouth of the material crucible faces upward, and the inner diameter of the pot mouth is 75cm-85cm
[0013] Preferably, both the first motor and the second motor are variable frequency motors.
[0014] Preferably, a collar is sleeved on the cutter shaft, and two of the blades are connected to the collar. The two blades are symmetrically arranged about the cutter shaft, and the collar is a plurality of collars that are spaced apart along the axial direction of the cutter shaft.
[0015] Preferably, a clamping protrusion is formed on the knife shaft and protrudes outwardly in the radial direction of the knife shaft, and the clamping protrusion extends along the axial direction of the knife shaft, and a first clamping groove cooperating with the clamping protrusion is provided on the inner wall of the collar;
[0016] A limiting ring is arranged between adjacent sleeve rings, the limiting ring is sleeved on the knife shaft, and a second clamping groove adapted to the clamping protrusion is arranged on the inner wall of the limiting ring;
[0017] A threaded column is provided at one end of the knife shaft away from the side wall of the material crucible, and an annular bulge is provided at one end of the knife shaft close to the side wall of the material crucible. The annular bulge protrudes radially along the knife shaft, and an end nut threadedly screwed on the threaded column presses the multiple rings against the annular bulge.
[0018] Preferably, a discharge port is provided on the side wall of the material crucible and close to the stirring paddle, the discharge port extends outward to form a discharge channel, and a discharge valve is provided in the discharge channel.
[0019] Preferably, the pot cover is provided with a slurry port, the slurry port is connected with the inner cavity of the material crucible and the outside, and a closing cover is correspondingly provided on the slurry port.
[0020] Preferably, one end of the pot cover extends radially outwardly along the pot cover to form a connecting arm, and the end of the connecting arm is hinged to the platform through a hinge shaft. A movable push rod is provided below the connecting arm and between the hinge shaft and the pot cover. The top of the movable push rod is hinged to the connecting arm, and the bottom of the movable push rod is connected to the piston of a driving device, and the piston can move up and down.
[0021] Preferably, a safety interlock device is further included, the safety interlock device comprising: a pressure sensor, a power switch and a controller, the power switch is used to control the power on and off of the first motor and the second motor;
[0022] The pressure sensor is arranged below the movable push rod, and the movable push rod can press the pressure sensor downward, and the controller is used to receive and determine the pressure value delivered by the pressure sensor;
[0023] When the pot lid is fastened, the pressure sensor generates an in-place pressure value. If the controller detects that the pressure value delivered by the pressure sensor is equal to or greater than the in-place pressure value, the controller controls the power switch to close. If the controller detects that the pressure value delivered by the pressure sensor is less than the in-place pressure value, the controller controls the power switch to open.
[0024] Preferably, an observation window is also provided on the pot cover.
[0025] It can be seen from the above technical solution that the mixing device in the utility model can not only achieve the mixing of solids and solids, but also the mixing of solids and liquids. Therefore, after the solids and solids are mixed, there is no need to discharge the mixed powder and then feed it to another device, but the next step of solid-liquid mixing can be carried out directly in the material crucible. In this way, the manual labor is reduced, the risk of spilling and leaking is reduced, and the operation efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0027] Figure 1 A plan view of a material mixing device disclosed in an embodiment of the utility model;
[0028] Figure 2 A plan view of a shredder disclosed in an embodiment of the utility model;
[0029] Figure 3 This is a mixing uniformity data diagram obtained by mixing auxiliary materials through the material mixing device in the utility model disclosed in the embodiment of the utility model.
[0030] The names of the components are as follows:
[0031] 1-material crucible, 2-pot cover, 3-stirring paddle, 4-chopping knife, 5-discharging valve, 6-discharging channel, 7-observation window cover, 8-connecting arm, 41-knife shaft, 42-blade, 43-throwing ring, 44-end nut, 45-ring convex. DETAILED DESCRIPTION
[0032] In view of this, the core of the utility model is to provide a material mixing device to reduce the workload of operators, reduce the risk of spilling and leaking materials, and improve operating efficiency.
[0033] In order to make the technical personnel in this field better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Figure 1 to Figure 2 .
[0034] The material mixing device disclosed in the utility model comprises: a material crucible 1, a pot cover 2, a stirring paddle 3, a first motor, a chopping knife 4 and a second motor.
[0035] The stirring paddle 3 is rotatably arranged on the bottom wall inside the material crucible 1. The stirring paddle 3 includes a stirring shaft and blades connected to each other. The stirring shaft is arranged along the axial direction of the material crucible 1. The blades are arranged along the radial direction of the stirring shaft, and there are multiple blades, and the multiple blades are radially distributed around the stirring shaft. The first motor is located outside the material crucible 1 and is arranged below the material crucible 1. The stirring shaft passes through the bottom wall of the material crucible 1 and is connected to the motor shaft of the first motor.
[0036] The chopping knife 4 is rotatably arranged on the side wall of the material crucible 1. The chopping knife 4 includes a knife shaft 41 and a blade 42 connected to each other. The knife shaft 41 is arranged perpendicular to the side wall of the material crucible 1, and the blade 42 is arranged along the radial direction of the knife shaft 41, and there are multiple blades 42. The second motor is arranged outside the material crucible 1 and located at the side of the material crucible 1. The knife shaft 41 penetrates the side wall of the material crucible 1 and is connected to the motor shaft of the second motor.
[0037] When mixing solids with solids, for example, when mixing five raw materials and auxiliary materials, namely mannitol, citric acid, sodium citrate, carbon 13 urea, and steviol glycoside, first open the pot cover 2, pour the five raw materials and auxiliary materials into the material crucible 1, and then close the pot cover 2. Start the first motor and the second motor to rotate the stirring paddle 3 and the chopping knife 4. The stirring paddle 3 can make the raw materials and auxiliary materials splash onto the side wall of the material crucible 1, and then the raw materials and auxiliary materials are ejected by the side wall, so that the raw materials and auxiliary materials are in a boiling state, and the five raw materials and auxiliary materials are mixed in the boiling process. The rotation of the chopping knife 4 will continuously crush the raw materials and auxiliary materials, which is more conducive to the mixing of the raw materials and auxiliary materials. At the same time, the chopping knife 4 stirs the raw materials and auxiliary materials, accelerates the splashing of the raw materials and auxiliary materials, intensifies the boiling of the raw materials and auxiliary materials, thereby promoting the mixing of the raw materials and auxiliary materials.
[0038] After the five raw materials and auxiliary materials are mixed, a mixed powder is formed. Then, slurry is injected into the material crucible 1. The rotation of the stirring paddle will quickly stir the slurry and the mixed powder in the material crucible 1 to flow, so that the slurry and the mixed powder form a vortex rolling state. The 4 chopping knives will break up the rolling mixed powder, so that the mixed powder is continuously merged with the slurry, thereby achieving the mixing of the mixed powder and the slurry. After the mixed powder and the slurry are mixed, a wet material is formed.
[0039] The mixing device in the utility model can not only achieve the mixing of solids and solids, but also the mixing of solids and liquids. Therefore, after the solids and solids are mixed, there is no need to discharge the mixed powder and then feed it to another device, but the next step of solid-liquid mixing can be directly carried out in the material pot 1. In this way, the manual labor is reduced, the risk of spilling and leaking is reduced, and the operation efficiency is improved.
[0040] The pot mouth of the material crucible 1 in the utility model faces upward, and the inner diameter of the pot mouth is 75cm-85mcm. Furthermore, the inner diameter of the pot mouth can be designed to be 80cm. The inner diameter of the feeding port in the prior art is 20cm. Compared with the prior art, the feeding port in the utility model, that is, the pot mouth of the material crucible 1, has a larger diameter, which is conducive to pouring materials into the material crucible 1 and reduces the risk of spilling materials. In the prior art, the mixing of solids and solids is achieved by rotating a two-dimensional rotating mixing device up and down and left and right. Since the mixing device needs to rotate and vibrate as a whole, it is necessary to design the inner diameter of the feeding port as small as possible to reduce the risk of leakage. In the utility model, the material crucible 1 does not need to vibrate as a whole, the material crucible 1 remains fixed, and only the internal stirring paddle 3 and the shredding knife 4 need to rotate. In this case, the probability of leakage through the feeding port is relatively small, so the inner diameter of the pot mouth of the material crucible 1 can be designed to be larger to facilitate pouring materials into the material crucible 1.
[0041] The utility model designs the first motor for driving the stirring blade 3 and the second motor for driving the chopping blade 4 as variable frequency motors. The stirring and cutting speeds can be changed by frequency conversion, so that the mixing uniformity of the materials can be adjusted by changing the stirring and cutting speeds.
[0042] The knife shaft 41 of the shredder 4 of the utility model is sleeved with a collar 43, and two blades 42 are connected to the collar 43. The two blades 42 are arranged symmetrically about the knife shaft 41. A plurality of collars 43 are arranged at intervals on the knife shaft 41, and two left and right blades 42 are arranged on each collar 43, so that a row of blades 42 is formed on the left and right sides of the knife shaft 41 respectively. The collar 43 and the blades 42 can be integrally processed and then sleeved on the knife shaft 41.
[0043] The connection between the collar 43 and the blade shaft 41 is as follows: a clamping protrusion is formed on the blade shaft 41 along the radial direction of the blade shaft 41, and the clamping protrusion extends along the axial direction of the blade shaft 41. A first clamping groove that cooperates with the clamping protrusion is provided on the inner wall of the collar 43. The cooperation between the first clamping groove and the clamping protrusion realizes the circumferential connection between the collar 43 and the blade shaft 41, so that the collar 43 rotates synchronously with the blade shaft 41. Further, the clamping protrusions are provided on both the left and right sides of the blade shaft 41, and then two first clamping grooves on the left and right sides are provided on the inner wall of the collar 43.
[0044] A limiting ring is arranged between adjacent collars 43, and the limiting ring is also sleeved on the knife shaft 41. A second clamping groove adapted to the clamping protrusion is arranged on the inner wall of the limiting ring, and the cooperation between the second clamping groove and the clamping protrusion enables the limiting ring to rotate synchronously with the knife shaft 41. The function of the limiting ring is to limit the spacing distance between two adjacent collars 43.
[0045] A threaded column is provided at one end of the knife shaft 41 away from the side wall of the material crucible 1, and a nut is screwed on the threaded column. An annular protrusion 45 is provided at one end of the knife shaft 41 close to the side wall of the material crucible 1, and the annular protrusion 45 protrudes along the radial direction of the knife shaft 41. The end nut 44 is screwed on the threaded column, and a plurality of collars 43 are pressed against the annular protrusion 45. In this way, the axial fixation of the collars 43 and the knife shaft 41 is achieved.
[0046] To facilitate assembly, a clamping ring can be provided between the end nut 44 and the outermost ring 43. The clamping ring is sleeved on the knife shaft 41. The end nut 44 squeezes the outermost ring 43 through the clamping ring. The outermost ring 43 squeezes the second outermost ring 43 through the limiting ring. All the rings 43 are clamped on the annular protrusion 45 by analogy.
[0047] The chopping knife 4 in the utility model is not only convenient for processing, but also convenient for disassembly and assembly.
[0048] A discharge port is provided on the side wall of the material crucible 1 and near the stirring paddle 3, and the discharge port extends outward to form a discharge channel 6, and a discharge valve 5 is provided in the discharge channel 6. The mixed powder and the slurry are mixed to form a wet material. When discharging, the discharge valve 5 is first controlled to open, and then the first motor is started to rotate the stirring paddle 3. Under the driving action of the stirring paddle 3, the wet material flows out of the discharge port and flows into the wet material collection device through the discharge channel 6.
[0049] The pot cover 2 matched with the material crucible 1 is provided with a slurry port, which connects the inner cavity of the material crucible 1 with the outside. A closing cover is correspondingly provided on the slurry port. After the raw materials and auxiliary materials are mixed, there is no need to open the pot cover 2, only the closing cover needs to be opened, and the slurry is injected into the material crucible 1 through the slurry port. In this way, the convenience of adding slurry is improved.
[0050] The pot cover 2 is driven to open or close by a driving device. Specifically, one end of the pot cover 2 extends radially outwardly along the pot cover 2 to form a connecting arm 8, and the end of the connecting arm 8 away from the pot cover 2 is hinged on the platform through a hinge shaft. A movable push rod is provided below the connecting arm 8 and between the hinge shaft and the pot cover 2. The top of the movable push rod is hinged to the connecting arm 8, and the bottom is connected to the piston of the driving device, and the piston of the driving device can output up and down movement. In this way, when the pot cover 2 needs to be opened, the piston of the driving device moves upward, pushing the connecting arm 8 to flip upward around the hinge shaft, and the pot cover 2 is opened as the connecting arm 8 flips upward. When the pot cover 2 needs to be closed, the piston of the driving device moves downward, driving the connecting arm 8 to flip downward around the hinge shaft, and the pot cover 2 is closed as the connecting arm 8 flips downward. The automatic closing and opening of the pot cover 2 further reduces the amount of manual labor and reduces the operation risk.
[0051] The utility model also provides a safety interlock device for the pot cover 2, which includes a pressure sensor, a power switch and a controller. The power switch is used to control the power on or off of the first motor and the second motor. The first motor and the second motor can only be started when they are powered on.
[0052] The pressure sensor is arranged below the movable push rod, and the movable push rod can press the pressure sensor downward. The controller is used to receive and judge the pressure value transmitted by the pressure sensor. When the pot cover 2 is fastened, the pressure sensor generates an in-place pressure value. If the controller detects that the pressure value transmitted by the pressure sensor is equal to or greater than the in-place pressure value, the controller controls the power switch to close. If the controller detects that the pressure value transmitted by the pressure sensor is less than the in-place pressure value, the controller controls the power switch to open.
[0053] If the pot cover 2 is not fastened, the movable push rod does not move to the preset lower limit position, and the squeezing force of the movable push rod on the pressure sensor does not reach the in-place pressure value, the controller will not control the power switch to close, the first motor and the second motor are in a power-off state, and in this case the stirring paddle and the chopping knife 4 will not start. That is, if the pot cover 2 is not closed tightly, the stirring paddle and the chopping knife 4 will not start. If the pot cover 2 is opened during the mixing process, the controller detects that the pressure value delivered by the pressure sensor is less than the in-place pressure value, the controller will control the power switch to turn off, and the first motor and the second motor will stop running, and the stirring paddle 3 and the chopping knife 4 will also stop working.
[0054] The setting of the safety interlock device of the utility model realizes that the stirring paddle 3 and the chopping knife 4 can work only when the pot cover 2 is closed tightly, and the stirring paddle 3 and the chopping knife 4 will not work if the pot cover 2 is not closed tightly or opened. In this way, the occurrence of mechanical safety accidents and the loss of raw materials can be prevented.
[0055] The utility model also provides an observation window on the pot cover 2, so that the operator can observe the operation situation in the material pot 1 when the pot cover 2 is tightly closed. An observation window cover 7 is provided on the observation window.
[0056] The material mixing device in the utility model also includes a housing, a platform is arranged on the top of the housing, and the connecting arm 8 of the pot cover 2 is hinged on the platform. A control panel is also arranged on the platform to change the operating parameters of the first motor and the second motor through the control panel. The material crucible 1, the first motor and the second motor are all arranged in the housing to protect the material crucible 1, the first motor and the second motor.
[0057] Please refer to the attached Figure 3 After a pot of materials is mixed for 4 minutes, stop the machine and take 10 portions of mixed powder from the upper and lower layers. The RSD of the 10 portions of mixed powder is 1.06%. Start the machine again and mix for 2 minutes. Take 10 portions of mixed powder from the upper and lower layers and the RSD is 1.86%. RSD≤5% meets the requirements, and the smaller the RSD, the more uniform the mixing. The RSD measured in the above two times is less than 5%, indicating that the uniformity of the two mixings meets the requirements. It can be seen that the material mixing device in the utility model shortens the mixing time from 150 minutes to 4 minutes, but the mixing effect meets the requirements specified in the standard.
[0058] In the description of this application, it should be noted that the terms "upper", "lower", "left", "right", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting this application. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0059] Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0060] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A material mixing device, It is characterized in that include: A material crucible (1) and a pot cover (2) matched with the material crucible (1); a stirring paddle (3) rotatably arranged on the bottom wall of the material crucible (1), the stirring paddle (3) comprising a stirring shaft and paddles connected to each other, the stirring shaft being arranged along the axial direction of the material crucible (1), the paddles being arranged along the radial direction of the stirring shaft, and the paddles being a plurality arranged around the stirring shaft; A first motor, the first motor being arranged below the material crucible (1), the stirring shaft penetrating through the bottom wall of the material crucible (1) and being connected to the motor shaft of the first motor; a chopping knife (4) rotatably arranged on the side wall of the material crucible (1), the chopping knife (4) comprising a knife shaft (41) and a blade (42) connected to each other, the knife shaft (41) being arranged perpendicular to the side wall of the material crucible (1), the blade (42) being arranged along the radial direction of the knife shaft (41), and the blade (42) being multiple; A second motor, wherein the second motor is arranged on the side of the material crucible (1), and the knife shaft (41) passes through the side wall of the material crucible (1) and is connected to the motor shaft of the second motor.
2. The material mixing device according to claim 1, It is characterized in that The pot mouth of the material crucible (1) faces upward, and the inner diameter of the pot mouth is 75cm-85cm.
3. The material mixing device according to claim 1, It is characterized in that The first motor and the second motor are both variable frequency motors.
4. The material mixing device according to claim 1, It is characterized in that The knife shaft (41) is sleeved with a collar (43), and the collar (43) is connected to two blades (42). The two blades (42) are symmetrically arranged about the knife shaft (41), and the collar (43) is a plurality of collars arranged at intervals along the axial direction of the knife shaft (41).
5. The material mixing device according to claim 4, It is characterized in that A clamping protrusion is formed on the knife shaft (41) and protrudes outward in the radial direction of the knife shaft (41), and the clamping protrusion extends along the axial direction of the knife shaft (41), and a first clamping groove cooperating with the clamping protrusion is provided on the inner wall of the collar (43); A limiting ring is arranged between adjacent sleeve rings (43), the limiting ring is sleeved on the knife shaft (41), and a second clamping groove adapted to the clamping protrusion is arranged on the inner wall of the limiting ring; A threaded column is provided at one end of the knife shaft (41) away from the side wall of the material crucible (1), and an annular protrusion (45) is provided at one end of the knife shaft (41) close to the side wall of the material crucible (1). The annular protrusion (45) protrudes radially along the knife shaft (41), and an end nut (44) screwed on the threaded column presses the plurality of collars (43) against the annular protrusion (45).
6. The material mixing device according to claim 1, It is characterized in that A discharge port is provided on the side wall of the material crucible (1) and close to the stirring paddle (3), and the discharge port extends outward to form a discharge channel (6), and a discharge valve (5) is provided in the discharge channel (6).
7. The material mixing device according to claim 1, It is characterized in that The pot cover (2) is provided with a slurry port, the slurry port is connected with the inner cavity of the material crucible (1) and the outside, and a sealing cover is correspondingly provided on the slurry port.
8. The material mixing device according to claim 1, It is characterized in that One end of the pot cover (2) extends radially outward to form a connecting arm (8), the end of the connecting arm (8) is hinged to the platform via a hinge shaft, a movable push rod is provided below the connecting arm (8) and between the hinge shaft and the pot cover (2), the top of the movable push rod is hinged to the connecting arm (8), the bottom of the movable push rod is connected to the piston of the driving device, and the piston can move up and down.
9. The material mixing device according to claim 8, It is characterized in that Also included is a safety interlock device, the safety interlock device comprising: a pressure sensor, a power switch and a controller, the power switch is used to control the power on and off of the first motor and the second motor; The pressure sensor is arranged below the movable push rod, and the movable push rod can press the pressure sensor downward, and the controller is used to receive and determine the pressure value delivered by the pressure sensor; When the pot cover (2) is fastened, the pressure sensor generates an in-place pressure value. If the controller detects that the pressure value delivered by the pressure sensor is equal to or greater than the in-place pressure value, the controller controls the power switch to close. If the controller detects that the pressure value delivered by the pressure sensor is less than the in-place pressure value, the controller controls the power switch to open.
10. The material mixing device according to claim 1, It is characterized in that The pot cover (2) is also provided with an observation window.