moisture mixing machine

Abstract

The application belongs to the field of manufactured sand manufacturing equipment, and discloses a wet mixing machine, which comprises a material accumulation monitoring module for monitoring the material accumulation distribution on the inner cylinder wall of the mixing cylinder of the wet mixing machine, a water supply and cleaning module, a cleaning pipeline axially extending into the cylinder cavity of the mixing cylinder, a cleaning nozzle for removing the material accumulation arranged on the cleaning pipeline, and a controller configured to receive a material accumulation cleaning instruction signal, start the material accumulation monitoring module to determine the material accumulation distribution area on the inner cylinder wall, and control the water supply and cleaning module to align the cleaning nozzle with the material accumulation distribution area for material accumulation removal. The application adopts laser to collect material accumulation data, can obtain a very clear material accumulation area distribution map, has a large sensing range and high accuracy. Moreover, the application adopts a fixed spraying mode, the nozzle can rotate, the flushing efficiency is high, and there is no flushing dead angle.

Description

Technical Field

[0001] This application belongs to the field of manufactured sand manufacturing equipment, specifically, it relates to a mixing machine. Background Technology

[0002] The mixing plant is a key piece of equipment in the production process of manufactured sand. The mixing plant needs to rotate continuously to mix the finished sand feed with clean water, keeping the water content of the feed at a standard level, thereby completing the necessary humidification operation of the finished sand.

[0003] However, due to the presence of a large amount of dust and large sand particles in the feed, after being mixed with water in the drum of the wet mixer, a sticky mixture is easily formed. This mixture tends to adhere to the inner wall of the mixing drum of the wet mixer, gradually forming a silt layer (i.e., accumulated material), and may even eventually cover the entire inner wall of the drum, causing many adverse consequences, such as overloading the wet mixer, causing equipment failure, and uneven mixing.

[0004] Therefore, existing technologies generally require manual cleaning, which involves operators climbing into the mixing drum cavity to clean it periodically, typically every one to two days. This method of shutting down the machine and manually cleaning poses significant safety hazards, threatening the personal safety of operators. Furthermore, the cleaning efficiency is low, and the shutdown cleaning process also affects the overall efficiency of manufactured sand production.

[0005] In addition, existing technologies also employ pressure detection components within the mixing drum to detect material accumulation. The control system acquires the current pressure value detected by these components and determines the degree of material accumulation based on this pressure value, controlling the water supply accordingly. This automatic material accumulation detection and cleaning before each mixing cycle minimizes material buildup, preventing caking and serious damage to the mixing drum. However, this method also has significant drawbacks. For example, the water rinsing time is long, and simply increasing the water volume wastes water and creates blind spots, failing to fundamentally resolve the material caking issue. Summary of the Invention

[0006] The main objective of this application is to provide a mixing machine that can efficiently and completely remove material accumulated on the inner wall of the mixing drum while saving water.

[0007] To achieve the above objectives, this application discloses a mixing and wetting machine, comprising:

[0008] The material accumulation monitoring module is used to monitor the distribution of accumulated material on the inner wall of the mixing drum of the wet mixer;

[0009] The water supply and cleaning module includes a cleaning pipe that extends axially into the cavity of the mixing drum, and the cleaning pipe is equipped with a cleaning nozzle for removing accumulated material.

[0010] The controller is configured as follows:

[0011] Receive the accumulated material cleaning instruction signal;

[0012] The material accumulation monitoring module is activated to determine the material accumulation distribution area on the inner cylinder wall;

[0013] The water supply and cleaning module is controlled so that the cleaning nozzle is aligned with the material distribution area to perform fixed spray cleaning of the accumulated material.

[0014] In some embodiments, the material accumulation monitoring module includes:

[0015] Multiple laser detection devices are arranged on the axial end side of the stirring drum and are used to emit lasers at different radial heights toward the radially inner side of the inner drum wall to detect the accumulated material.

[0016] The axial projections of the multiple laser detection devices on the axial end face of the stirring cylinder are arranged on the same radial line in the axial end face and are radially spaced from each other.

[0017] In some embodiments, each of the laser detection devices includes coaxially aligned components:

[0018] A laser emitter is fixedly mounted at the first axial end of the stirring tank and is used to emit a laser toward the second axial end;

[0019] A laser receiver is fixedly mounted at the second end of the axial direction to receive laser light.

[0020] In some embodiments, the outer peripheral wall of the cleaning pipe is provided with multiple rows of cleaning nozzles evenly distributed along the circumference of the pipe, and each row of the cleaning nozzles includes multiple cleaning nozzles arranged at axial intervals and facing the same direction.

[0021] In some implementations, activating the material accumulation monitoring module to determine the material accumulation distribution area on the inner cylinder wall includes:

[0022] It is determined that the stirring drum is in a rotating working state with a constant drum rotation angular velocity;

[0023] Control multiple laser detection devices to intermittently emit lasers and upload the received laser signals;

[0024] Based on the lost laser signal and the rotational angular velocity of the drum, the projection of the accumulated material on the inner cylinder wall onto the axial end face is determined to be located in a fan-shaped projection area on the axial end face, which is taken as the material distribution area.

[0025] In some embodiments, activating the material accumulation monitoring module to determine the material accumulation distribution area on the inner cylinder wall further includes:

[0026] A first laser detection device that determines that all emitted laser signals are received, and a second laser detection device that determines that emitted laser signals are lost;

[0027] The radial height of the accumulated material is determined to be between the radial installation positions of the first laser detection device and the second laser detection device.

[0028] In some embodiments, the water supply and cleaning module further includes:

[0029] A pipe rotation control mechanism is used to drive the cleaning pipe to rotate and control the pipe rotation angular velocity;

[0030] A water control system provides the cleaning pipe with adjustable water pressure cleaning liquid.

[0031] In some embodiments, controlling the water supply and cleaning module to align the cleaning nozzle with the material accumulation distribution area for targeted spraying and removal includes:

[0032] The pipe rotation control mechanism is activated to drive the cleaning pipe to rotate synchronously with the mixing drum, and to make the cleaning nozzle radially aligned with the material distribution area;

[0033] The water volume control system provides cleaning liquid with a preset cleaning water pressure to the cleaning pipeline;

[0034] The accumulated material is continuously sprayed through the cleaning nozzle.

[0035] In some implementations, the controller is further configured to:

[0036] Receive the drum operation command signal;

[0037] In response to the drum working command signal, the stirring drum is controlled to rotate at a constant drum rotation angular velocity;

[0038] Control the shutdown of the pipe rotation control mechanism to allow the cleaning pipe to rotate freely;

[0039] The water volume control system provides cleaning liquid with a preset working water pressure to the cleaning pipeline.

[0040] In some implementations, the preset cleaning water pressure is greater than the preset working water pressure.

[0041] In some embodiments, the pipe rotation control mechanism includes:

[0042] A stop head is fixedly installed on the wall of the cleaning pipe;

[0043] An electromagnetic stopper is fitted onto the cleaning pipe and is used to lock or unlock with the stop head under the control of the controller.

[0044] A pipeline drive motor is used to drive the electromagnetic stop to rotate the cleaning pipeline.

[0045] In some embodiments, the electromagnetic stop includes an electromagnetic core and an electromagnetic actuator that are respectively energized. The controller is further configured to control the direction of the respective energizing current of the electromagnetic core and the electromagnetic actuator to control the mutual repulsion or attraction between the electromagnetic core and the electromagnetic actuator. The electromagnetic actuator can be attracted and moved away from and unlock the stop head under the attraction of the electromagnetic core, and the electromagnetic actuator can be pushed closer to and lock the stop head in the mutual repulsion state with the electromagnetic core.

[0046] In some embodiments, the two ends of the cleaning pipe extend axially out of the two ends of the mixing cylinder cavity and are rotatably mounted on the frame of the wet mixer via end bearings.

[0047] In the wet mixer of this application, a novel strategy for cleaning accumulated material is proposed. The material accumulation monitoring module can monitor the material accumulation on the cavity wall in real time, determine the main distribution area of ​​the material accumulation, and further clean the material accumulation by using the cleaning nozzle on the cleaning pipe that extends into the cavity of the mixing drum in a targeted spraying manner. This not only improves the cleaning efficiency but also reduces resource consumption, and the material accumulation is removed more thoroughly, achieving a complete and comprehensive cleaning of the inner wall of the drum.

[0048] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0049] The accompanying drawings are provided to illustrate the present application and form part of the specification. They are used together with the following detailed description to explain the present application, but do not constitute a limitation thereof. In the drawings:

[0050] Figure 1 This is a schematic diagram of the structure of a wet mixer according to a specific embodiment of this application;

[0051] Figure 2 This is a schematic diagram of the mixing drum of a wet mixer according to a specific embodiment of the present application, showing the laser detection device and its installation position;

[0052] Figure 3 This is a schematic diagram of the electromagnetic stop in a wet mixer according to a specific embodiment of this application;

[0053] Figure 4 This is a control flowchart of the controller in a wet mixer according to a specific embodiment of this application;

[0054] Figure 5 This is a schematic diagram of the material cleaning process of a wet mixer according to a specific embodiment of this application.

[0055] Explanation of reference numerals in the attached figures

[0056] Label Name Label Name

[0057] 1. Front bearing 2. Cleaning nozzle

[0058] 3. Clean the pipes. 4. Rear bearing.

[0059] 5. Stop head 6. Electromagnetic stop device

[0060] 7. Adapter 8. Mixing drum

[0061] 9. Water inlet pipe 10. Water volume control system

[0062] 11 Laser emitter 12 Laser receiver

[0063] 61 Electromagnetic core 62 Electromagnetic actuator

[0064] 63 Mounting box 64 Mounting base

[0065] 81 stirring blades 100 pipe drive motor Detailed Implementation

[0066] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0067] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0068] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0069] With the implementation of environmental protection policies, the mining of river sand has gradually decreased, and it has been replaced by manufactured sand. The production of manufactured sand involves using machinery to crush, screen, and wet relatively large sand and gravel, transforming them into small particles with a particle size similar to river sand and a moisture content that meets the corresponding standards.

[0070] As a crucial piece of equipment in manufactured sand production, the cleaning of accumulated material inside the mixing drum of the wet mixing mill is critical, affecting equipment safety and production efficiency. Therefore, this application discloses a novel wet mixing mill, such as... Figure 1 , Figure 2 As shown, a specific embodiment of the mixing machine includes:

[0071] The material accumulation monitoring module is used to monitor the material accumulation distribution on the inner wall of the mixing drum 8 of the wet mixer;

[0072] The water supply and cleaning module includes a cleaning pipe 3 that extends axially into the cavity of the mixing drum 8, and a cleaning nozzle 2 for removing accumulated material is provided on the cleaning pipe 3.

[0073] The controller is configured as follows:

[0074] Receive the accumulated material cleaning instruction signal;

[0075] Activate the material accumulation monitoring module to determine the distribution area of ​​material accumulation on the inner cylinder wall;

[0076] The water supply and cleaning module is controlled so that the cleaning nozzle 2 is aligned with the material distribution area to perform fixed spray cleaning of the accumulated material.

[0077] As can be seen, this application adopts a more refined material accumulation cleaning strategy, namely, accurately detecting the location of material accumulation through material accumulation monitoring; on this basis, the cleaning pipe 3 extends axially into the cavity of the mixing drum 8, and the cleaning nozzle 2 on the cleaning pipe 3 adopts a fixed spray cleaning method for the material accumulation, which not only saves more water, but also has higher cleaning efficiency and more complete and comprehensive material accumulation removal.

[0078] The material accumulation monitoring module can employ various detection methods and elements, such as video monitoring combined with cameras or sensing methods using multiple sensors arranged inside the cylinder, to accurately locate the accumulated material and its deposition position. Alternatively, a rotatable nozzle can be used to align the accumulated material through rotational positioning for targeted spraying.

[0079] Because the mixing drum 8 of the wet mixer needs to remain rotating during operation, and the drum cavity contains a large amount of manufactured sand, this embodiment specifically employs laser detection, taking into account both installation difficulty and cost. Figure 2 As shown, the material accumulation monitoring module includes:

[0080] Multiple laser detection devices are arranged on the axial end side of the mixing drum 8 and are used to emit lasers at different radial heights toward the radial inner side of the inner drum wall to detect the accumulated material.

[0081] Among them, the axial projections of multiple laser detection devices on the axial end face of the stirring tank 8 are arranged on the same radial line in the axial end face and are radially spaced from each other.

[0082] When there is radially inwardly protruding material accumulation on the inner wall of the mixing drum 8, the axial laser emitted by the laser detection device will be blocked by the accumulation and reflected. Since the laser detection device is fixed, the position of the accumulation, i.e., its specific position along the axis of the mixing drum, can be determined by calculating the time it takes for the laser to travel from emission to return. To detect the radial height of the accumulation in the mixing drum 8, multiple laser detection devices can be arranged at radial intervals along the mixing drum, thus emitting multiple laser beams at different radial heights towards the inner side of the inner wall. Furthermore, the axial projections of the multiple laser detection devices on the axial end face of the mixing drum 8 are arranged on the same radial line on the axial end face and are radially spaced from each other, ensuring that multiple laser beams with different radial heights can hit the accumulation. The height of the accumulation determines whether laser beams at different radial heights will be blocked by the accumulation. Thus, among the one or more laser beams blocked by the accumulation, the largest radial height value between the corresponding one or more laser detectors and the inner wall of the mixing drum can be considered essentially the height of the accumulation. Once the axial and radial positions of the material accumulation relative to the mixing drum are defined, the material accumulation can be precisely located.

[0083] Considering the simplicity and convenience of the measurement, each laser detection device in this embodiment includes coaxially aligned components:

[0084] Laser emitter 11 is fixedly mounted at the first axial end of the stirring tank 8 and is used to emit laser towards the second axial end;

[0085] Laser receiver 12 is fixedly mounted at the second end of the axial direction to receive laser light.

[0086] Therefore, each laser detection device can emit a corresponding laser through its laser emitter 11 and receive the laser beam through a laser receiver 12 arranged on the opposite side of the axis. When the corresponding laser receiver 12 fails to receive the laser beam, it can be determined that the laser beam is blocked by the accumulated material. Both the laser emitter 11 and the laser receiver 12 can be fixedly mounted on the frame of the wet mixer outside the axial ends of the mixing drum 8.

[0087] exist Figure 2 In this embodiment, a plurality of stirring blades 81 are provided inside the stirring drum 8. Two laser detection devices are arranged at both ends of the stirring drum 8: a first laser detection device, comprising a first laser emitter and a first laser receiver respectively disposed at both axial ends of the stirring drum; and a second laser detection device, comprising a second laser emitter and a second laser receiver respectively disposed at both axial ends of the stirring drum. The first and second laser emitters are arranged radially spaced apart along the stirring drum 8 and located on the same radial line on the axial end face. The radial distance between the first laser detection device and the inner wall of the stirring drum 8 is L1, and the radial distance between the second laser detection device and the inner wall of the stirring drum 8 is L2, where L2 is greater than L1. If the laser receiver 12 of the second laser detection device can always receive the laser beam without omission, while the laser receiver 12 of the first laser detection device does not receive at least a portion of the laser beam, it can be determined that the height of the accumulated material does not exceed L2 but is greater than L1. Those skilled in the art will understand that the provision of two laser detection devices in this embodiment is merely an example and for the convenience of simple detection and calculation; however, this application is not limited to this, and three or more laser detection devices can be provided.

[0088] During the operation of the mixing machine, the laser emitter 11 intermittently emits lasers, which are received by the laser receiver 12 and the signals are transmitted to the controller. For example, two sets of laser detection devices can each emit lasers at a frequency of time interval t, and upload the number of lasers received by the mixing drum 8 of the mixing machine in each rotation cycle to the controller.

[0089] See Figure 4 The controller's control steps include S100, S200, and S300, but it should be noted that their timing is not limited. Specifically, control step S200, which starts the material accumulation monitoring module, can be performed after receiving the material accumulation cleaning command signal in step S100, or monitoring can be started continuously before receiving the material accumulation cleaning command signal in S100. Step S300 must be performed after S100 and S200, that is, it can only perform precise point-to-point spraying to remove the material after receiving the command and obtaining the monitoring results.

[0090] In this embodiment, as an example, after receiving the material accumulation cleaning command signal in the controller's control step S100, the control step S200, which activates the material accumulation monitoring module to determine the material accumulation distribution area on the inner cylinder wall, may further include:

[0091] Ensure that the mixing drum 8 is in a rotating working state with a constant drum rotation angular velocity;

[0092] Control multiple laser detection devices to emit lasers intermittently and upload the received laser signals;

[0093] Based on the lost laser signal and the drum rotation angular velocity, the projection of the accumulated material on the inner cylinder wall onto the axial end face is determined to be located in a fan-shaped projection area on the axial end face, which is used as the material distribution area.

[0094] As can be seen, while the mixing drum rotates at a normal constant speed, the laser detection device is activated to detect the position of the accumulated material, emits laser light at a frequency of time interval t, and uploads the received laser signal; the controller obtains the lost laser signal, and can determine the angular position of the accumulated material that caused the loss of the laser signal based on the angular position of the laser detection device and the angular velocity of the drum rotation, that is, determine that the projection of the accumulated material on the inner wall of the drum on the axial end face of the drum is located in the fan-shaped projection area of ​​the axial end face, and this fan-shaped projection area is the material distribution area.

[0095] Furthermore, as described above, the height range of the accumulated material and its axial position within the mixing drum can be calculated for precise positioning. Therefore, in this embodiment, the control step of activating the material accumulation monitoring module to determine the material distribution area on the inner cylinder wall may further include:

[0096] A first laser detection device that determines that all emitted laser signals are received, and a second laser detection device that determines that emitted laser signals are lost;

[0097] The radial height of the accumulated material is determined to be between the radial installation positions of the first laser detection device and the second laser detection device.

[0098] Furthermore, when all laser detection devices no longer have any lost laser beams, the material removal can be considered complete.

[0099] In this embodiment, to save costs, the nozzle arrangement is optimized. Multiple rows of cleaning nozzles are evenly spaced along the circumference of the cleaning pipe 3. Each row includes multiple cleaning nozzles 2 arranged axially at intervals and facing the same direction. Thus, after determining the fan-shaped projection area of ​​the axial end face that serves as the material accumulation distribution area, the cleaning pipe 3 can be rotated so that one row of cleaning nozzles rotates to the fan-shaped projection area, aligning all nozzles in that row with the accumulated material. Then, as the pipe and mixing drum rotate synchronously, the nozzles remain aligned with the accumulated material, performing precise, targeted cleaning. With the aforementioned multiple rows of cleaning nozzles on the cleaning pipe 3, precise calculation of the axial position of the accumulated material is unnecessary, making the process simpler and more convenient.

[0100] See Figure 1 The water supply and cleaning module in this embodiment also includes:

[0101] A pipe rotation control mechanism is used to drive the cleaning pipe 3 to rotate and control the rotational angular velocity of the cleaning pipe 3;

[0102] The water control system 10 provides cleaning liquid with adjustable water pressure to the cleaning pipe 3.

[0103] Under normal operating conditions, the cleaning pipe 3 is free to rotate, meaning it can rotate unrestrained around its axis. Both ends of the cleaning pipe 3 axially extend from the ends of the mixing drum 8 and are rotatably mounted on the frame of the wetter via end bearings. Specifically, the front end of the cleaning pipe 3 is mounted on the frame of the wetter via the front bearing 1, and the rear end of the cleaning pipe 3 is mounted on the frame via the rear bearing 4. The water control system 10 is connected to the cleaning pipe 3 sequentially via the inlet pipe 9 and the adapter 7, providing the cleaning pipe 3 with adjustable water pressure cleaning liquid.

[0104] Because targeted spraying is required, the cleaning pipe 3 and the mixing drum 8 need to rotate synchronously. Therefore, a pipe rotation control mechanism is added to drive the cleaning pipe 3 to rotate and control its rotational angular velocity. Based on this pipe rotation control mechanism, the controller's control step S300, which controls the water supply and cleaning modules to ensure the cleaning nozzle 2 aligns with the accumulated material distribution area for targeted spraying and removal, may further include:

[0105] Start the pipe rotation control mechanism to drive the cleaning pipe 3 and the mixing drum 8 to rotate synchronously, and make the cleaning nozzle 2 radially aligned with the material distribution area;

[0106] The water volume control system 10 provides cleaning liquid with a preset cleaning water pressure to the cleaning pipe 3;

[0107] The accumulated material is continuously sprayed through the cleaning nozzle 2.

[0108] As can be seen, after the cleaning pipe 3 and the mixing drum 8 rotate synchronously and the cleaning nozzle 2 is radially aligned with the material distribution area, the water pressure can be increased, and the cleaning nozzle 2 can continuously spray at fixed points to eventually eliminate the material accumulation.

[0109] In addition, the controller can also be configured as follows:

[0110] Receive the drum operation command signal;

[0111] In response to the drum working command signal, the mixing drum 8 is controlled to rotate at a constant drum rotation angular velocity;

[0112] Control the pipe rotation control mechanism to allow the cleaning pipe 3 to rotate freely;

[0113] The water volume control system 10 provides cleaning liquid with a preset working water pressure to the cleaning pipe 3.

[0114] In other words, under normal operating conditions of the wet mixer, the mixing drum 8 rotates at a constant speed, and the cleaning pipe 3 rotates freely. At this time, the water pressure in the cleaning pipe 3 is normal, but lower than the water pressure during cleaning, meaning the preset cleaning water pressure is greater than the preset working water pressure.

[0115] In this embodiment, such as Figure 1 , Figure 3 As shown, the pipe rotation control mechanism includes:

[0116] The stop head 5 is fixedly installed on the pipe wall of the cleaning pipe 3;

[0117] Electromagnetic stopper 6, sleeved on cleaning pipe 3 and used to lock or unlock with stop head 5 under the control of controller; and

[0118] The pipeline drive motor 100 is used to drive the electromagnetic stopper 6 to rotate the cleaning pipeline 3.

[0119] When the electromagnetic stopper 6 and the stop head 5 are unlocked, the cleaning pipe 3 is uncontrolled and can rotate freely, i.e., it rotates without constraint. When the electromagnetic stopper 6 and the stop head 5 are locked, the rotation of the cleaning pipe 3 is controlled by the electromagnetic stopper 6. The pipe drive motor 100 drives the electromagnetic stopper 6 to rotate, which in turn drives the cleaning pipe 3, which is coaxial with the electromagnetic stopper 6, to rotate synchronously. At this time, the controller can achieve synchronous rotation of the stirring drum 8 and the cleaning pipe 3 by controlling the pipe drive motor 100 and the drum drive motor of the stirring drum 8.

[0120] like Figure 3As shown, in one embodiment, the electromagnetic stopper 6 may include an electromagnetic core 61 and an electromagnetic actuator 62, both energized. The controller is further configured to control the direction of the respective energizing currents of the electromagnetic core 61 and the electromagnetic actuator 62, thereby controlling the mutual repulsion or attraction between them. The electromagnetic actuator 62, under the attraction of the electromagnetic core 61, can move away from and unlock the stop head 5, and in a state of mutual repulsion with the electromagnetic core 61, the electromagnetic actuator 62 can be pushed closer to and lock the stop head 5. During installation, one end of the pipe drive motor 100 is connected to drive the electromagnetic actuator 62, and the other end is connected to the mounting base 64, which then mounts the motor to the frame of the mixing machine.

[0121] Those skilled in the art will understand that this application uses lasers for material accumulation data acquisition, which can obtain a very clear distribution map of the material accumulation area. In contrast, material accumulation information detected by sensors such as pressure sensors has a small sensing range and can only detect the material accumulation near the sensor installation point, resulting in poor accuracy. Moreover, existing technologies using fixed pipeline flushing can have blind spots, while this application uses a fixed spray method with a rotatable nozzle, resulting in high flushing efficiency and eliminating blind spots.

[0122] See Figure 5 In actual operation, the material accumulation monitoring module can perform real-time and equally spaced detection of the material accumulation and thickness generated in the mixing drum 8 during the production process. The detection data is fed back to the controller in real time, and then the material accumulation distribution map and the material accumulation thickness curve over time can be drawn. As shown in the figure, as an example, when the accumulated material thickness reaches the preset value X1, the controller can issue an early warning. After the production activity is completed, the operator confirms the cleaning command and starts the mixing machine. The controller automatically activates the alarm bell and the cleaning module. The cleaning pipeline 3 changes from a free-rotating state to a stopped state controlled by the pipeline rotation control mechanism. The water volume control system 10 increases the water inflow to the maximum. The single cleaning time is set to T. After a single cleaning is completed, the accumulated material monitoring module can confirm the thickness, which is set to X2. When the accumulated material thickness is lower than X2, the mixing machine and the cleaning module are turned off. When the accumulated material thickness is higher than X2, the pipeline rotation control mechanism is activated, and the water volume control system 10 increases the water inflow to the maximum. After cleaning is completed, the accumulated material monitoring module confirms the thickness. As shown in the figure, the cycle is repeated a maximum of three times. If the standard is still not met after three cycles, the controller alarms and a manual inspection is performed to check whether the cleaning module has malfunctioned. If so, the machine needs to be stopped to troubleshoot the problem.

[0123] The optional embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the embodiments of this application, various simple modifications can be made to the technical solutions of the embodiments of this application, and these simple modifications all fall within the protection scope of the embodiments of this application.

[0124] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of this application will not describe the various possible combinations separately.

[0125] Those skilled in the art will understand that all or part of the steps in the methods described above can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a microcontroller, chip, or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, portable hard drive, read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0126] Furthermore, various different implementations of this application can be combined in any way, as long as they do not violate the spirit of the implementation of this application, they should also be regarded as the content disclosed in this application.

Claims

1. A mixing machine, characterized in that, The mixing machine includes: The material accumulation monitoring module is used to monitor the material accumulation distribution on the inner wall of the mixing drum (8) of the mixing machine. The material accumulation monitoring module includes multiple laser detection devices. The multiple laser detection devices are arranged on the axial end side of the mixing drum (8) and are used to emit lasers at different radial heights toward the radial inner side of the inner wall to detect the material accumulation. The axial projections of the multiple laser detection devices on the axial end face of the mixing drum (8) are arranged on the same radial line in the axial end face and are radially spaced from each other. The water supply and cleaning module includes a cleaning pipe (3) that extends axially into the cavity of the mixing drum (8), and the cleaning pipe (3) is provided with a cleaning nozzle (2) for removing accumulated material. The controller is configured as follows: Receive the accumulated material cleaning instruction signal; The stirring drum (8) is determined to be in a rotating working state with a constant drum rotation angular velocity; Control multiple laser detection devices to intermittently emit lasers and upload the received laser signals; Based on the lost laser signal and the rotational angular velocity of the drum, the projection of the accumulated material on the inner cylinder wall onto the axial end face is determined to be located in a fan-shaped projection area on the axial end face, which is taken as the material distribution area. Control the water supply and cleaning module so that the cleaning nozzle (2) is aligned with the material distribution area to perform fixed spray cleaning of the accumulated material.

2. The mixing machine according to claim 1, characterized in that, Each of the laser detection devices comprises coaxially aligned components: A laser emitter (11) is fixedly disposed at the first axial end of the stirring tube (8) and is used to emit a laser toward the second axial end; A laser receiver (12) is fixedly mounted at the second end of the axial direction to receive laser light.

3. The mixing machine according to claim 1, characterized in that, The outer circumferential wall of the cleaning pipe (3) is provided with multiple rows of cleaning nozzles evenly distributed along the circumference of the pipe. Each row of the cleaning nozzles includes multiple cleaning nozzles (2) arranged at intervals along the axial direction and facing the same direction.

4. The mixing and wetting machine according to claim 1, characterized in that, Activating the material accumulation monitoring module to determine the material accumulation distribution area on the inner cylinder wall further includes: A first laser detection device that determines that all emitted laser signals are received, and a second laser detection device that determines that emitted laser signals are lost; The radial height of the accumulated material is determined to be between the radial installation positions of the first laser detection device and the second laser detection device.

5. The mixing and wetting machine according to claim 2 or 3, characterized in that, The water supply and cleaning module also includes: A pipe rotation control mechanism is used to drive the cleaning pipe (3) to rotate and control the pipe rotation angular velocity of the cleaning pipe (3); A water control system (10) provides the cleaning pipe (3) with a water pressure adjustable cleaning liquid.

6. The mixing and wetting machine according to claim 5, characterized in that, Controlling the water supply and cleaning module to align the cleaning nozzle (2) with the material accumulation distribution area for targeted cleaning includes: Start the pipe rotation control mechanism to drive the cleaning pipe (3) to rotate synchronously with the stirring drum (8), and make the cleaning nozzle (2) radially aligned with the material distribution area; The water volume control system (10) provides cleaning liquid with a preset cleaning water pressure to the cleaning pipe (3); The accumulated material is continuously sprayed through the cleaning nozzle (2).

7. The mixing machine according to claim 6, characterized in that, The controller is also configured to: Receive the drum operation command signal; In response to the drum working command signal, the stirring drum (8) is controlled to rotate at a constant drum rotation angular velocity; Control the shut-off of the pipe rotation control mechanism to allow the cleaning pipe (3) to rotate freely; The water volume control system (10) provides cleaning liquid with a preset working water pressure to the cleaning pipe (3).

8. The mixing machine according to claim 7, characterized in that, The preset cleaning water pressure is greater than the preset working water pressure.

9. The mixing and wetting machine according to claim 5, characterized in that, The pipeline rotation control mechanism includes: The stop head (5) is fixedly installed on the pipe wall of the cleaning pipe (3); An electromagnetic stopper (6) is fitted onto the cleaning pipe (3) and is used to lock or unlock with the stopper head (5) under the control of the controller; The pipeline drive motor (100) is used to drive the electromagnetic stop (6) to rotate the cleaning pipeline (3).

10. The mixing machine according to claim 9, characterized in that, The electromagnetic stop (6) includes an electromagnetic core (61) and an electromagnetic actuator (62) that are respectively energized. The controller is also configured to control the direction of the respective energized current of the electromagnetic core (61) and the electromagnetic actuator (62) to control the mutual repulsion or attraction between the electromagnetic core (61) and the electromagnetic actuator (62). The electromagnetic actuator (62) can be attracted and moved away from and unlock the stop head (5) under the attraction action with the electromagnetic core (61), and the electromagnetic actuator (62) can be pushed close to and lock the stop head (5) in the mutual repulsion state with the electromagnetic core (61).

11. The mixing and wetting machine according to claim 9, characterized in that, The two ends of the cleaning pipe (3) extend axially through the two ends of the cylinder cavity of the mixing drum (8) and are rotatably mounted on the frame of the wet mixer via end bearings.

Images