A continuous sand mixing device

Abstract

The utility model relates to the technical fields of sand mixing equipment discloses a continuous sand mixing device, including work table, the work table upper surface is provided with conveying and stirring mechanism, conveying and stirring mechanism includes sand mixing cylinder, sand mixing cylinder both ends are closed, sand mixing cylinder outer wall is opened with observation hole, the inlayed observation window of observation hole is equipped with, sand mixing cylinder is equipped with two parallel and can rotate around the rotation axis of itself radially in it, two the rotation axis is respectively welded with helical blade that extends along the axis direction of rotation axis helically, sand mixing cylinder upper portion is sequentially opened with main material mouth, first auxiliary material mouth and second auxiliary material mouth along the axis direction, sand mixing cylinder lower part is opened with the discharge gate. The utility model solves the technical problem that traditional intermittent sand mixing equipment production efficiency is low, manual intervention is much, batch material performance fluctuation is big and is difficult to satisfy modern industry to sand mixing efficiency and sand mixing quality requirement.

Description

Technical Field

[0001] This utility model relates to the technical field of sand mixing equipment, specifically to a continuous sand mixing device. Background Technology

[0002] Sand mixing, a core process in materials preparation, involves precisely blending raw sand, binders, curing agents, and additives to provide a stable base material for subsequent production stages. In the foundry industry, the mixing quality of molding sand directly affects the forming accuracy, surface finish, and internal defects of castings. In the construction industry, the uniformity of concrete and mortar mixing and the properties of the materials directly determine the strength and durability of structural components. Furthermore, sand mixing is widely used in refractory material preparation and ceramic raw material processing; the quality of its mixing is a key factor in ensuring the quality of end products and production stability.

[0003] Currently, most mainstream sand mixing equipment on the market operates intermittently. Its production process requires manual operation to complete a cycle of "feeding-mixing-discharging," with each stage relying heavily on manual intervention. First, operators must add raw sand to the mixing equipment according to a preset ratio, followed by binders, curing agents, and other auxiliary materials. During the mixing phase, operators must periodically shut down the equipment and manually open the top cover to observe the mixing state of the materials inside using a flashlight, checking for clumping or unmixed areas. If problems are found, the top cover must be tightened again and the mixing time extended. If temperature adjustment is needed during mixing, the equipment must be manually shut down, and the power to an external heating device must be manually turned on. After heating for a period, the power to the heating device must be turned off, and the mixing equipment restarted. If humidity adjustment is needed, the top cover must be frequently opened manually, and water sprayed into the equipment using a handheld sprayer, before the top cover is tightened and mixing continues. Once the operator judges, based on experience, that the material mixing has met the process requirements, the equipment must be shut down again and the material discharged.

[0004] This production model not only relies on a large amount of manual intervention, resulting in high labor intensity, but also suffers from differences in the feeding speed and stirring time between different batches under manual operation. This leads to variations in the degree of mixing and reaction process of each batch of materials, which can easily cause fluctuations in material properties and fail to meet the stringent requirements of efficiency and stability for modern large-scale production. Utility Model Content

[0005] The present invention aims to provide a continuous sand mixing device to solve the technical problems of low production efficiency, excessive manual intervention, and large fluctuations in material properties between batches in traditional intermittent sand mixing equipment, which makes it difficult to meet the requirements of modern industry for sand mixing efficiency and quality.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] 1) A continuous sand mixing device, comprising a workbench, wherein a conveying and stirring mechanism is provided on the upper surface of the workbench, the conveying and stirring mechanism includes a sand mixing cylinder, the two ends of the sand mixing cylinder are closed, an observation hole is provided on the outer wall of the sand mixing cylinder, an observation window is embedded in the observation hole, two parallel rotating shafts are provided in the radial direction of the sand mixing cylinder and can rotate around their own axis, respectively, spiral blades extending in a spiral shape along the axial direction of the two rotating shafts are welded on the two rotating shafts, a main material port, a first auxiliary material port and a second auxiliary material port are sequentially provided in the upper part of the sand mixing cylinder along the axial direction, and a discharge port is provided in the lower part of the sand mixing cylinder.

[0008] This utility model uses a workbench as the basic supporting structure. The conveying and mixing mechanism on the workbench includes a sand mixing cylinder with both ends closed. The observation window on the outer wall of the sand mixing cylinder allows for real-time observation of the internal condition of the sand mixing cylinder, reducing the need for frequent manual opening and inspection. Two parallel rotating shafts that can rotate around their own axes are arranged radially inside the sand mixing cylinder. The spiral blades welded on the rotating shafts extend spirally along their axial direction. The double rotating shaft structure can continuously stir and convey the material during rotation. The main material inlet, the first auxiliary material inlet, and the second auxiliary material inlet are sequentially opened along the axial direction at the top of the sand mixing cylinder, which can continuously feed different materials. The discharge port at the bottom can continuously discharge the mixed material, forming a complete continuous operation process.

[0009] The rotation of the double helix blades continuously stirs the material within the mixing drum while simultaneously conveying it along the drum's axis. This enables continuous operation from material input to mixing and discharge, eliminating the need for the cyclical waiting process of loading, mixing, and unloading inherent in traditional intermittent equipment, significantly reducing non-operational time. The main feed inlet, first auxiliary feed inlet, and second auxiliary feed inlet allow for separate control of the input time and proportion of different materials. Combined with continuous stirring, this ensures that the materials are gradually and evenly mixed during conveying, avoiding the uneven mixing caused by excessive material input in traditional equipment. The observation window allows operators to monitor the mixing status in real time, promptly identifying and addressing any abnormalities.

[0010] The continuous operation mode significantly improves sand mixing efficiency, greatly increasing the amount of sand mixed per unit time, meeting the needs of modern large-scale industrial production. The continuous stirring and conveying of the double helical blades makes the material mixing more uniform, and combined with real-time observation and adjustment, the sand mixing effect is guaranteed. The whole process reduces the number and frequency of manual intervention, which not only reduces labor costs, but also avoids the impact of human operation errors on the quality of sand mixing. Ultimately, the device can stably and efficiently produce mixed sand that meets the requirements of modern industry.

[0011] 2) A continuous sand mixing device according to 1), wherein:

[0012] Two first bearings are fixed at one end of the sand mixing cylinder, and two second bearings are fixed at the other end of the sand mixing cylinder. One end of each of the two rotating shafts passes through the first bearing and exits the sand mixing cylinder, and the other end of each of the two rotating shafts is rotatably connected to the sand mixing cylinder through the second bearing.

[0013] Two first bearings are fixed at one end of the sand mixing cylinder, and two second bearings are fixed at the other end. One end of each of the two rotating shafts passes through the first bearing and exits the sand mixing cylinder, while the other end is rotatably connected to the sand mixing cylinder through the second bearing. The radial positioning of the rotating shafts by the first and second bearings effectively suppresses radial runout during rotation, ensuring that the spiral blades maintain a stable mixing trajectory and improving the uniformity of sand mixing. Both the first and second bearings are ball bearings. The rotational connection characteristics of ball bearings reduce friction between the rotating shaft and the sand mixing cylinder, significantly reducing the rotational resistance of the rotating shaft, making the rotating shaft rotate more flexibly, and ensuring smoother equipment operation. This reduces noise and component wear caused by friction, extends the service life of the equipment, and also reduces energy consumption during equipment operation.

[0014] 3) A continuous sand mixing device according to 1), wherein:

[0015] It also includes a servo motor, which is installed on the outside of the sand mixing cylinder. A motor bracket is fixed on the upper surface of the worktable corresponding to the position of the servo motor. The servo motor is fixed on the motor bracket by bolts and nuts. The servo motor has an output shaft. A sprocket is installed at one end of each of the two rotating shafts that protrude from the sand mixing cylinder. A chain is wound between the two sprockets. One of the sprockets is connected to the free end of the output shaft.

[0016] In this invention, the servo motor is installed on the outside of the mixing cylinder, and the motor bracket securely fixes the servo motor with bolts and nuts to ensure that the servo motor will not shake during operation, thus guaranteeing the stability of the power output and providing a stable power output to the rotating shaft. This reduces noise and component wear caused by motor shaking. The servo motor can provide stable power, keeping the rotating shaft at a suitable speed to meet the mixing requirements of different materials, further improving the adaptability and mixing effect of the equipment.

[0017] The output shaft of the servo motor is connected to one of the sprockets, and a chain is wound between the two sprockets. This sprocket and chain transmission method can transmit the power of the servo motor to the two rotating shafts. The sprocket and chain transmission makes the two rotating shafts rotate synchronously, ensuring that the two helical blades mix and convey the material at the same rhythm, thus improving the uniformity of material mixing and the continuity of conveying.

[0018] 4) A continuous sand mixing device according to 1), wherein:

[0019] Two support seats are evenly distributed along the axial direction on the lower surface of the sand mixing cylinder. The upper surface of the support seat has an arc surface that matches the lower surface of the sand mixing cylinder. The lower surfaces of the support seats are fixed to the upper surface of the workbench by bolts and nuts. Support columns for supporting the workbench are fixed at both ends of the lower surface of the workbench.

[0020] In this invention, two support seats are evenly distributed along the axial direction on the lower surface of the sand mixing cylinder. The arc surface of the upper surface of the support seat is adapted to fit the lower surface of the sand mixing cylinder to fit tightly against the sand mixing cylinder, providing stable support for the sand mixing cylinder and preventing displacement or shaking of the sand mixing cylinder during operation. The lower surface of the support seat is fixed to the upper surface of the workbench by bolts and nuts, which further enhances the stability of the support and ensures the smooth operation of the sand mixing work.

[0021] The support columns fixed at both ends of the lower surface of the workbench are used to support the workbench and fix it at a suitable height, making it convenient for operators to perform operations such as adding, observing and discharging materials. Operators can complete various operations without bending over or standing on tiptoe, which improves the convenience of operation, reduces labor intensity, and also leaves space under the workbench to facilitate the placement of material receiving devices, making the material discharge process smoother and improving overall work efficiency.

[0022] 5) A continuous sand mixing device according to 1), wherein:

[0023] The discharge port is located on the lower surface of the sand mixing cylinder at the end away from the servo motor. An outwardly extending discharge pipe is welded to the discharge port. The central axis of the discharge pipe is perpendicular to the upper surface of the worktable. A through hole is opened on the worktable corresponding to the position of the discharge pipe. The discharge pipe extends outward and passes through the through hole. A gate valve is provided inside the discharge pipe.

[0024] In this invention, the discharge port is located on the lower surface of the mixing cylinder at the end furthest from the servo motor, and is aligned with the direction in which the material is conveyed along the spiral blades inside the mixing cylinder, ensuring that the material flows naturally to the discharge port after being fully mixed; the discharge pipe welded to the discharge port extends outward, which can guide the material to move along a fixed path and prevent it from scattering when discharged; the central axis of the discharge pipe is perpendicular to the upper surface of the workbench and passes through the through hole at the corresponding position of the workbench, which facilitates the collection of material below the workbench.

[0025] The gate valve inside the discharge pipe controls the opening and closing of the discharge pipe. When it is observed through the observation window that the material in the mixing cylinder has not yet reached the expected mixing effect, the gate valve is in the closed state, which can prevent the material from being discharged prematurely. This allows the material to be further mixed evenly under the continuous stirring of the spiral blades. The closed state of the gate valve provides sufficient mixing time for the material. Combined with the continuous stirring of the spiral blades, this effectively ensures the uniformity of the material mixing and avoids substandard sand quality caused by premature material discharge. When it is observed through the observation window that the material mixing meets the requirements, the operator opens the gate valve to allow the evenly mixed material to be discharged through the discharge pipe.

[0026] 6) A continuous sand mixing device according to 1), wherein:

[0027] The observation window is connected to the sand mixing cylinder by bolts and nuts, and the observation window is arc-shaped.

[0028] In this invention, the observation window and the sand mixing cylinder are connected by bolts and nuts. This connection method facilitates the installation and disassembly of the observation window. When the surface of the observation window is stained and affects observation, it can be easily removed for cleaning or replacement to ensure the observation effect. The observation window is arc-shaped and matches the shape of the sand mixing cylinder. It can fit tightly against the outer wall of the sand mixing cylinder, avoiding gaps between the observation window and the sand mixing cylinder that could lead to material leakage. It also makes the appearance of the sand mixing cylinder cleaner and more aesthetically pleasing.

[0029] 7) A continuous sand mixing device according to 1), wherein:

[0030] Temperature and humidity sensors are arranged side by side at the top of the mixing cylinder. Several heating plates are arranged on the spiral blades along the axis of the rotation shaft. The heating plates are fixedly connected to the spiral blades by bolts and nuts. The cylinder also includes a microprocessor. The temperature, humidity, and heating plates are all electrically connected to the microprocessor.

[0031] In this invention, a temperature sensor and a humidity sensor are arranged side by side at the top of the mixing cylinder. The temperature sensor and humidity sensor can monitor the temperature and humidity of the material in the mixing cylinder in real time and transmit the monitoring information to the microprocessor to provide a basis for subsequent temperature and humidity adjustment. Several heating plates arranged along the axial direction on the spiral blades are fixed to the blades by bolts and nuts. When the heating plates are working, they can heat the material and rotate with the spiral blades to make the heating more uniform and avoid local overheating or insufficient heating.

[0032] The microprocessor is electrically connected to a temperature sensor, a humidity sensor, and a heating plate. The temperature sensor continuously monitors the temperature data inside the mixing drum and feeds it back to the microprocessor. When the microprocessor detects that the temperature inside the mixing drum is lower than the preset temperature, it controls the heating plate to work. When the temperature reaches the required level, the microprocessor controls the heating plate to stop working, thus realizing automatic adjustment of the temperature inside the mixing drum. This ensures that the materials are mixed at a suitable temperature, improves the stability of the mixed sand quality, and reduces the error and labor intensity of manual temperature adjustment.

[0033] 8) A continuous sand mixing device according to 1), wherein:

[0034] A water spraying mechanism is provided on the upper surface of the sand mixing cylinder. The water spraying mechanism includes a water storage tank, which is fixed to the upper surface of the sand mixing cylinder by bolts and nuts. The water storage tank has a water outlet, and a pipe is installed on the water outlet. A water pump is installed on the pipe, and an atomizing nozzle is installed at the end of the pipe. A water inlet is opened on the upper surface of the sand mixing cylinder, and the atomizing nozzle is fixed in the water inlet. A solenoid valve is installed on the pipe near the atomizing nozzle, and the solenoid valve is electrically connected to the microprocessor.

[0035] In this invention, the water spraying mechanism on the upper surface of the mixing cylinder includes a water storage tank fixed to the upper surface of the mixing cylinder by bolts and nuts. The water storage tank provides a stable water source and is securely installed, preventing displacement due to equipment vibration. The water pump on the pipeline provides power for water delivery, transporting the water in the storage tank to the atomizing nozzle. The atomizing nozzle at the end of the pipeline is fixed in the water inlet on the upper surface of the mixing cylinder, atomizing the water into fine droplets before spraying it into the mixing cylinder. This increases the contact area between the water and the material, allowing for more thorough contact and mixing.

[0036] A solenoid valve installed on the pipeline near the atomizing nozzle is electrically connected to a microprocessor. A humidity sensor continuously monitors the humidity inside the mixing drum and feeds the data back to the microprocessor. Based on the humidity level inside the mixing drum monitored by the humidity sensor, the microprocessor controls the opening or closing of the solenoid valve. When the humidity inside the mixing drum is lower than the preset humidity value, the microprocessor controls the solenoid valve to open; when the humidity inside the mixing drum reaches the preset humidity value, the microprocessor controls the solenoid valve to close. This regulates the humidity inside the mixing drum, further improving the mixing quality while reducing the workload and error associated with manual humidity adjustment.

[0037] Compared with the prior art, this utility model also has the following technical effects:

[0038] In this invention, the coordinated design of dual rotating shafts, dual helical blades, and multiple feed ports allows the main material and different auxiliary materials to come into contact and gradually blend along the conveying path. The helical extension of the helical blades not only propels the material forward but also achieves deep mixing through the shearing and tumbling of the material by the blades. This avoids local material aggregation caused by single-port feeding and allows multiple components to naturally reach a homogeneous state during continuous conveying, achieving a dual balance between continuous feeding and precise mixing. This overcomes the limitations of traditional equipment, which either creates mixing dead zones due to batch feeding or reduces production efficiency due to intermittent conveying.

[0039] Secondly, the temperature and humidity control system, with its real-time monitoring and dynamic response closed-loop control characteristics, significantly improves the equipment's adaptability to complex materials. Temperature sensors continuously monitor temperature changes within the mixing drum, and humidity sensors continuously monitor humidity changes. The microprocessor adjusts the heating plate's operating status in real-time based on data from both the temperature and humidity sensors. The heating plate rotates with the spiral blades to achieve uniform heating, while atomizing nozzles replenish moisture. The entire process requires no interruption of mixing and conveying, meeting the specific temperature and humidity requirements of different materials while avoiding quality fluctuations caused by manual adjustments. This ensures the equipment maintains stable mixed sand quality while operating continuously. Attached Figure Description

[0040] Figure 1 This is a front view of a continuous sand mixing device according to the present invention;

[0041] Figure 2 This is a cross-sectional view (AA) of a continuous sand mixing device according to this utility model;

[0042] Figure 3 This is a left view of a continuous sand mixing device according to the present invention;

[0043] Figure 4 This is a BB cross-sectional view of a continuous sand mixing device according to this utility model;

[0044] Figure 5 This is a schematic diagram of the structure of the first and second bearings in a continuous sand mixing device according to this utility model. Detailed Implementation

[0045] The following detailed description illustrates the specific implementation method:

[0046] The reference numerals in the accompanying drawings include: workbench 1, discharge pipe 2, support column 3, support base 4, motor bracket 5, servo motor 6, chain 7, main material inlet 8, first auxiliary material inlet 9, second auxiliary material inlet 10, mixing cylinder 11, observation window 12, solenoid valve 13, pipe 14, water pump 15, water storage tank 16, rotating shaft 17, spiral blade 18, sprocket 19, first bearing 20, second bearing 21, temperature sensor 21, humidity sensor 22, atomizing nozzle 23, heating plate 24.

[0047] Reference will now be made in detail to the embodiments disclosed herein. Although the disclosure will be described in conjunction with embodiments and / or examples, they are not intended to limit the disclosure to these embodiments and / or examples. Rather, the disclosure covers alternatives, modifications, and equivalents.

[0048] See the example. Figure 1 As shown, this embodiment is a continuous sand mixing device, including a workbench 1. A conveying and stirring mechanism is provided on the upper surface of the workbench 1. The conveying and stirring mechanism includes a sand mixing cylinder 11. The two ends of the sand mixing cylinder 11 are closed. An observation hole is opened on the outer wall of the sand mixing cylinder 11. An observation window 12 is embedded in the observation hole. Two parallel rotating shafts 17 are provided in the radial direction of the sand mixing cylinder 11 and can rotate around their own axis. Spiral blades 18 extending in a spiral shape along the axial direction of the rotating shafts 17 are welded on the two rotating shafts 17 respectively. The upper part of the sand mixing cylinder 11 is provided with a main material port 8, a first auxiliary material port 9 and a second auxiliary material port 10 in sequence along the axial direction. The lower part of the sand mixing cylinder 11 is provided with a discharge port.

[0049] This utility model uses a workbench 1 as the basic supporting structure. The conveying and mixing mechanism on the workbench 1 includes a sand mixing cylinder 11 with both ends closed. The observation window 12 on the outer wall of the sand mixing cylinder 11 allows real-time observation of the internal condition of the sand mixing cylinder 11, reducing the need for frequent manual opening and inspection. Two parallel rotating shafts 17 are arranged radially inside the sand mixing cylinder 11 and can rotate around their own axes. The spiral blades 18 welded on the rotating shafts 17 extend spirally along their axial direction. The double rotating shaft 17 structure can continuously stir and convey the material when rotating. The main material inlet 8, the first auxiliary material inlet 9, and the second auxiliary material inlet 10 are opened sequentially along the axial direction at the upper part of the sand mixing cylinder 11, which can continuously feed different materials. The discharge port at the lower part can continuously discharge the mixed material, forming a complete continuous operation process.

[0050] During operation, the servo motor 6 drives the two rotating shafts 17 to rotate via the sprocket 19. The main material and auxiliary material are fed in from the corresponding main material port 8, the first auxiliary material port 9, and the second auxiliary material port 10, respectively. After being stirred and conveyed by the spiral blades 18, they are discharged from the discharge pipe 2. The temperature sensor 21 and the humidity sensor 22 monitor the parameters in real time. The microprocessor adjusts the heating plate 24 and the water spraying mechanism according to the data fed back by the temperature sensor 21 and the humidity sensor 22. The operator monitors the sand mixing process through the observation window 12.

[0051] The rotation of the double helix blades 18 continuously stirs the material within the mixing drum 11 while simultaneously conveying it along the axis of the mixing drum 11. This achieves continuous operation from material input to mixing and discharge, eliminating the need for the cyclical waiting process of loading, mixing, and unloading that occurs with traditional intermittent equipment, significantly reducing non-operation time. The main material inlet 8, the first auxiliary material inlet 9, and the second auxiliary material inlet 10 allow for separate control of the input time and proportion of different materials. Combined with continuous stirring, this ensures that the materials are gradually and evenly mixed during the conveying process, avoiding the uneven mixing caused by excessive material input in traditional equipment. The observation window 12 allows operators to monitor the mixing status in real time, promptly identifying and adjusting any abnormalities.

[0052] The continuous operation mode significantly improves sand mixing efficiency, greatly increasing the amount of sand mixed per unit time, meeting the needs of modern large-scale industrial production; the continuous stirring and conveying of the double helical blades 18 makes the material mixing more uniform, and combined with real-time observation and adjustment, the sand mixing effect is guaranteed; the whole process reduces the number and frequency of manual intervention, which not only reduces labor costs, but also avoids the impact of human operation errors on the sand mixing quality, ultimately enabling the device to stably and efficiently produce mixed sand that meets the requirements of modern industry.

[0053] Two first bearings 20 are fixed at one end of the sand mixing cylinder 11, and two second bearings 21 are fixed at the other end of the sand mixing cylinder 11. One end of each of the two rotating shafts 17 passes through the first bearings 20 and exits the sand mixing cylinder 11. The other ends of each of the two rotating shafts 17 are rotatably connected to the sand mixing cylinder 11 through the second bearings 21.

[0054] Two first bearings 20 are fixed at one end of the sand mixing cylinder 11, and two second bearings 21 are fixed at the other end. One end of each of the two rotating shafts 17 passes through the first bearing 20 and exits the sand mixing cylinder 11, while the other end is rotatably connected to the sand mixing cylinder 11 through the second bearing 21. The radial positioning of the rotating shafts 17 by the first bearings 20 and the second bearings 21 can effectively suppress the radial runout of the rotating shafts 17 during rotation, so that the spiral blades 18 maintain a stable stirring trajectory and improve the uniformity of sand mixing. Both the first bearings 20 and the second bearings 21 are ball bearings. The rotational connection characteristics of the ball bearings reduce the friction between the rotating shafts 17 and the sand mixing cylinder 11, significantly reducing the rotational resistance of the rotating shafts 17, making the rotation of the rotating shafts 17 more flexible, the equipment operation smoother, reducing noise and component wear caused by friction, extending the service life of the equipment, and also reducing the energy consumption during equipment operation.

[0055] It also includes a servo motor 6, which is installed on the outside of the sand mixing cylinder 11. A motor bracket 5 is fixed on the upper surface of the worktable 1 at the position corresponding to the servo motor 6. The servo motor 6 is fixed on the motor bracket 5 by bolts and nuts. The servo motor 6 has an output shaft. Two rotating shafts 17 are respectively installed at one end of the sand mixing cylinder 11, and a chain 7 is wound between the two sprockets 19. One of the sprockets 19 is connected to the free end of the output shaft.

[0056] In this invention, the servo motor 6 is installed on the outside of the mixing cylinder 11. The motor bracket 5 securely fixes the servo motor 6 with bolts and nuts, ensuring that the servo motor 6 will not shake during operation, thus guaranteeing the stability of the power output and providing a stable power output to the rotating shaft 17. This reduces noise and component wear caused by motor shaking. The servo motor 6 can provide stable power, keeping the rotating shaft 17 at a suitable speed to meet the mixing requirements of different materials, further improving the adaptability and mixing effect of the equipment.

[0057] The output shaft of the servo motor 6 is connected to one of the sprockets 19, and a chain 7 is wound between the two sprockets 19. This transmission method of sprockets 19 and chain 7 can transmit the power of the servo motor 6 to the two rotating shafts 17. The transmission of sprockets 19 and chain 7 makes the two rotating shafts 17 rotate synchronously, ensuring that the two spiral blades 18 have the same rhythm for stirring and conveying materials, thus improving the uniformity of material mixing and the continuity of conveying.

[0058] Two support seats 4 are evenly distributed along the axial direction on the lower surface of the sand mixing cylinder 11. The upper surface of the support seat 4 has an arc surface that matches the lower surface of the sand mixing cylinder 11. The lower surfaces of the support seats 4 are fixed to the upper surface of the workbench 1 by bolts and nuts. Support columns 3 for supporting the workbench 1 are fixed at both ends of the lower surface of the workbench 1.

[0059] In this invention, two support seats 4 are evenly distributed along the axial direction on the lower surface of the sand mixing cylinder 11. The arc surface of the upper surface of the support seat 4 is adapted to fit the lower surface of the sand mixing cylinder 11 to fit tightly against the sand mixing cylinder 11, providing stable support for the sand mixing cylinder 11 and preventing the sand mixing cylinder 11 from shifting or shaking during operation. The lower surface of the support seat 4 is fixed to the upper surface of the workbench 1 by bolts and nuts, which further enhances the stability of the support and ensures the smooth operation of the sand mixing work.

[0060] The support columns 3 fixed at both ends of the lower surface of the workbench 1 are used to support the workbench 1 and fix the workbench 1 at a suitable height, so that the operator can easily perform operations such as adding, observing and discharging materials. The operator can complete various operations without bending over or standing on tiptoe, which improves the convenience of operation, reduces labor intensity, and also leaves space under the workbench 1 to facilitate the placement of the receiving device, making the material discharge process smoother and improving the overall work efficiency.

[0061] The discharge port is located on the lower surface of the sand mixing cylinder 11 at the end away from the servo motor 6. An outwardly extending discharge pipe 2 is welded on the discharge port. The central axis of the discharge pipe 2 is perpendicular to the upper surface of the workbench 1. A through hole is opened on the workbench 1 corresponding to the position of the discharge pipe 2. The discharge pipe 2 extends outward and passes through the through hole. A gate valve is provided inside the discharge pipe 2.

[0062] In this invention, the discharge port is located on the lower surface of the mixing cylinder 11 at the end away from the servo motor 6, which is consistent with the direction in which the material is conveyed along the spiral blades 18 inside the mixing cylinder 11, ensuring that the material can flow naturally to the discharge port after being fully mixed; the discharge pipe 2 welded on the discharge port extends outward, which can guide the material to move along a fixed path and avoid scattering when discharged; the central axis of the discharge pipe 2 is perpendicular to the upper surface of the workbench 1 and passes through the through hole at the corresponding position of the workbench 1, which facilitates the collection of material below the workbench 1.

[0063] The gate valve inside the discharge pipe 2 controls the opening and closing of the discharge pipe 2. When it is observed through the observation window 12 that the material in the mixing cylinder 11 has not yet reached the expected mixing effect, the gate valve is in the closed state, which can prevent the material from being discharged prematurely, so that the material can be further mixed evenly under the continuous stirring of the spiral blade 18. The closed state of the gate valve provides sufficient mixing time for the material. Combined with the continuous stirring of the spiral blade 18, it effectively ensures the uniformity of the material mixing and avoids the failure of the mixed sand quality due to the premature discharge of the material. When it is observed through the observation window 12 that the material mixing meets the requirements, the operator opens the gate valve to allow the evenly mixed material to be discharged through the discharge pipe 2.

[0064] The observation window 12 is connected to the sand mixing cylinder 11 by bolts and nuts, and the observation window 12 is arc-shaped.

[0065] In this invention, the observation window 12 is connected to the sand mixing cylinder 11 by bolts and nuts. This connection method facilitates the installation and disassembly of the observation window 12. When the surface of the observation window 12 is stained and affects observation, it can be easily removed for cleaning or replacement to ensure the observation effect. The observation window 12 is arc-shaped and matches the shape of the sand mixing cylinder 11. It can fit tightly against the outer wall of the sand mixing cylinder 11, avoiding gaps between the observation window 12 and the sand mixing cylinder 11 that could lead to material leakage. It also makes the appearance of the sand mixing cylinder 11 neater and more beautiful.

[0066] Temperature sensor 21 and humidity sensor 22 are arranged side by side at the top of the mixing cylinder 11. Several heating plates 24 are arranged on the spiral blade 18 along the axis of the rotating shaft 17. The heating plates 24 are fixedly connected to the spiral blade 18 by bolts and nuts. The cylinder also includes a microprocessor. Temperature sensor 21, humidity sensor 22 and heating plates 24 are all electrically connected to the microprocessor.

[0067] In this invention, a temperature sensor 21 and a humidity sensor 22 are arranged side by side at the top of the mixing cylinder 11. The temperature sensor 21 and the humidity sensor 22 can monitor the temperature and humidity of the material in the mixing cylinder 11 in real time and transmit the monitoring information to the microprocessor to provide a basis for subsequent temperature and humidity adjustment. Several heating plates 24 arranged along the axial direction on the spiral blade 18 are fixed to the blade by bolts and nuts. When the heating plates 24 are working, they can heat the material and rotate with the spiral blade 18 to make the heating more uniform and avoid local overheating or insufficient heating.

[0068] The microprocessor is electrically connected to the temperature sensor 21, the humidity sensor 22, and the heating plate 24. The temperature sensor 21 continuously monitors the temperature data inside the mixing cylinder 11 and feeds it back to the microprocessor. When the microprocessor detects that the temperature inside the mixing cylinder 11 is lower than the required temperature, it controls the heating plate 24 to work. When the required temperature is reached, the microprocessor controls the heating plate 24 to stop working, thereby realizing automatic adjustment of the temperature inside the mixing cylinder 11. This ensures that the materials are mixed at a suitable temperature, improves the stability of the mixed sand quality, and reduces the error and labor intensity of manual adjustment.

[0069] A water spraying mechanism is provided on the upper surface of the sand mixing cylinder 11. The water spraying mechanism includes a water storage tank 16, which is fixed to the upper surface of the sand mixing cylinder 11 by bolts and nuts. The water storage tank 16 has a water outlet, and a pipe 14 is installed on the water outlet. A water pump 15 is installed on the pipe 14, and an atomizing nozzle 23 is installed at the end of the pipe 14. A water inlet is opened on the upper surface of the sand mixing cylinder 11, and the atomizing nozzle 23 is fixed in the water inlet. A solenoid valve 13 is installed on the pipe 14 near the atomizing nozzle 23, and the solenoid valve 13 is electrically connected to the microprocessor.

[0070] In this invention, the water spraying mechanism on the upper surface of the sand mixing cylinder 11 includes a water storage tank 16 fixed to the upper surface of the sand mixing cylinder 11 by bolts and nuts. The water storage tank 16 provides a stable water source and is securely installed, preventing displacement due to equipment vibration. The water pump 15 on the pipe 14 provides power for water transport, delivering the water in the water storage tank 16 to the atomizing nozzle 23. The atomizing nozzle 23 at the end of the pipe 14 is fixed in the water inlet on the upper surface of the sand mixing cylinder 11, atomizing the water into fine droplets before spraying it into the sand mixing cylinder 11. This increases the contact area between the water and the material, allowing for more thorough contact and mixing.

[0071] A solenoid valve 13 installed on the pipe 14 near the atomizing nozzle 23 is electrically connected to the microprocessor. A humidity sensor 22 continuously monitors the humidity inside the sand mixing cylinder 11 and feeds the data back to the microprocessor. The microprocessor controls the opening or closing of the solenoid valve 13 based on the humidity level inside the sand mixing cylinder 11 monitored by the humidity sensor 22. When the humidity inside the sand mixing cylinder 11 is lower than the humidity value set inside the microprocessor, the microprocessor controls the solenoid valve 13 to open. When the humidity inside the sand mixing cylinder 11 reaches the humidity value set inside the microprocessor, the microprocessor controls the solenoid valve 13 to close, thereby adjusting the humidity inside the sand mixing cylinder 11, further improving the sand mixing quality, and reducing the workload and error of manual humidity adjustment.

[0072] The above are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A continuous sand mixing device, characterized in that, The device includes a workbench, on the upper surface of which is provided a conveying and stirring mechanism. The conveying and stirring mechanism includes a sand mixing cylinder, which is closed at both ends. An observation hole is provided on the outer wall of the sand mixing cylinder, and an observation window is embedded in the observation hole. Two parallel rotating shafts that can rotate around their own axes are provided in the radial direction of the sand mixing cylinder. Spiral blades extending in a spiral shape along the axial direction of the rotating shafts are welded to the two rotating shafts respectively. A main material inlet, a first auxiliary material inlet, and a second auxiliary material inlet are sequentially provided in the upper part of the sand mixing cylinder along the axial direction. A discharge outlet is provided in the lower part of the sand mixing cylinder.

2. The continuous sand mixing device according to claim 1, characterized in that, Two first bearings are fixed at one end of the sand mixing cylinder, and two second bearings are fixed at the other end of the sand mixing cylinder. One end of each of the two rotating shafts passes through the first bearing and exits the sand mixing cylinder, and the other end of each of the two rotating shafts is rotatably connected to the sand mixing cylinder through the second bearing.

3. The continuous sand mixing device according to claim 1, characterized in that, It also includes a servo motor, which is installed on the outside of the sand mixing cylinder. A motor bracket is fixed on the upper surface of the worktable corresponding to the position of the servo motor. The servo motor is fixed on the motor bracket by bolts and nuts. The servo motor has an output shaft. A sprocket is installed at one end of each of the two rotating shafts that protrude from the sand mixing cylinder. A chain is wound between the two sprockets. One of the sprockets is connected to the free end of the output shaft.

4. A continuous sand mixing device according to claim 1, characterized in that, Two support seats are evenly distributed along the axial direction on the lower surface of the sand mixing cylinder. The upper surface of the support seat has an arc surface that matches the lower surface of the sand mixing cylinder. The lower surfaces of the support seats are fixed to the upper surface of the workbench by bolts and nuts. Support columns for supporting the workbench are fixed at both ends of the lower surface of the workbench.

5. A continuous sand mixing device according to claim 3, characterized in that, The discharge port is located on the lower surface of the sand mixing cylinder at the end away from the servo motor. An outwardly extending discharge pipe is welded to the discharge port. The central axis of the discharge pipe is perpendicular to the upper surface of the worktable. A through hole is opened on the worktable corresponding to the position of the discharge pipe. The discharge pipe extends outward and passes through the through hole. A gate valve is provided inside the discharge pipe.

6. A continuous sand mixing device according to claim 1, characterized in that, The observation window is connected to the sand mixing cylinder by bolts and nuts, and the observation window is arc-shaped.

7. A continuous sand mixing device according to claim 1, characterized in that, Temperature and humidity sensors are arranged side by side at the top of the mixing cylinder. Several heating plates are arranged on the spiral blades along the axis of the rotation shaft. The heating plates are fixedly connected to the spiral blades by bolts and nuts. The cylinder also includes a microprocessor. The temperature, humidity, and heating plates are all electrically connected to the microprocessor.

8. A continuous sand mixing device according to claim 7, characterized in that, A water spraying mechanism is provided on the upper surface of the sand mixing cylinder. The water spraying mechanism includes a water storage tank, which is fixed to the upper surface of the sand mixing cylinder by bolts and nuts. The water storage tank has a water outlet, and a pipe is installed on the water outlet. A water pump is installed on the pipe, and an atomizing nozzle is installed at the end of the pipe. A water inlet is opened on the upper surface of the sand mixing cylinder, and the atomizing nozzle is fixed in the water inlet. A solenoid valve is installed on the pipe near the atomizing nozzle, and the solenoid valve is electrically connected to the microprocessor.

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