Mechanized sand desliming control system

Abstract

This application provides a desliming control system for manufactured sand, including a feeding channel, a kneading and dispersing module, a water spraying module, and a controller. The feeding channel inlet is equipped with an MB value detection unit. The kneading and dispersing module and the water spraying module are located on opposite sides of the feeding channel. The water spraying module has a continuous spraying mode and a pulse spraying mode, and the total drainage volume of the two modes is the same within a preset time. The controller is configured to preset three ranges: a first range, a second range, and a third range. When the raw material's MB value falls within the first range, the water spraying module is activated in continuous spraying mode; when the raw material's MB value falls within the second range, the kneading and dispersing module is additionally activated; when the raw material's MB value falls within the third range, the water spraying module is switched to pulse spraying mode. The timing of the high-pressure water spray and the timing of the kneading force application are synchronized. The manufactured sand desliming control system provided by this application can flexibly adjust the desliming path for raw materials with different MB values, ensuring both mud removal and sand retention effects.

Description

Technical Field

[0001] This application belongs to the field of manufactured sand desliming technology, specifically relating to a manufactured sand desliming control system. Background Technology

[0002] Manufactured sand is a fine aggregate produced from rocks through crushing, screening, and other processes, and is one of the key sources of sand for concrete. The desliming process is a crucial step in manufactured sand production, aiming to remove harmful clay impurities and control the methylene blue value (MB value) to meet standard requirements.

[0003] In existing technologies, desliming mainly employs a wet process. This process typically uses high-pressure water spray combined with mechanical agitation within the equipment to break up the mud clumps, suspending the mud components, and ultimately overflowing a liquid mixture containing mud, fine sand, and stone powder. Subsequently, a hydrocyclone can be used to recover the fine sand and stone powder from the mixture.

[0004] In the above desliming methods, high-pressure hydraulics simultaneously perform the functions of breaking up mud clumps and promoting mud discharge. However, when processing mud clumps with high MB values, the required high pressure and large flow rate will accelerate the discharge of liquid mixture at the downstream end, thereby increasing the instantaneous working pressure of the hydrocyclone and causing a large loss of fine sand and stone powder. Summary of the Invention

[0005] This application provides a desliming control system for manufactured sand, which aims to flexibly adjust the desliming path for raw materials with different MB value ranges to ensure both sludge discharge and sand retention effects.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: A desliming control system for manufactured sand is provided, comprising: The feeding channel is used for feeding raw materials. The feed end is equipped with an MB value detection unit for outputting the MB value of the raw materials, and the discharge end is used to connect to the overflow desliming equipment. The feeding channel is used to transport the raw materials to the overflow desliming equipment at a preset time. The kneading and dispersing module is set inside the feeding channel to cooperate with the inner wall of the feeding channel on the opposite side to form a periodically changing extrusion gap, so as to periodically apply kneading force to the raw material; A water spray module, located within the feeding channel and opposite the kneading and dispersing module, has a continuous water spray mode for continuously spraying low-pressure water and a pulse water spray mode for intermittently spraying high-pressure water; the total drainage volume of the continuous water spray mode and the pulse water spray mode is the same within a preset time period; and The controller, electrically connected to the MB value detection unit, the kneading and dispersing module, and the water spraying module, is configured to: preset a first-level range, a second-level range, and a third-level range where the MB value gradually increases; in response to the raw material's MB value being in the first-level range, control the water spraying module to start in the continuous water spraying mode, and the kneading and dispersing module to standby; in response to the raw material's MB value being in the second-level range, control the water spraying module to start in the continuous water spraying mode, and the kneading and dispersing module to start; in response to the raw material's MB value being in the third-level range, control the water spraying module to start in the pulse water spraying mode, and the kneading and dispersing module to start, with the timing of high-pressure water spraying synchronized with the timing of kneading force application.

[0007] In one possible implementation, a circulation branch is connected in parallel to the feeding channel; the inlet of the circulation branch is located behind the kneading and dispersing module, and the outlet is connected to the inlet of the feeding channel. A control valve group is connected to the feeding channel. The control valve group is used to connect the feeding channel and the overflow desliming equipment, or to connect the feeding channel and the circulation branch. The water spray module also has a humidification mode that continuously sprays low-pressure water; within the preset time, the total drainage volume of the humidification mode is less than the total drainage volume of the continuous water spray mode. The control valve assembly is electrically connected to the controller, and the controller is further configured to: Four preset ranges are defined, and the MB values ​​corresponding to the four preset ranges are greater than the MB values ​​corresponding to the three preset ranges. In response to the raw material MB value being in one of the first, second, and third ranges, the control valve group is switched to open the feeding channel and the overflow desliming device; In response to the raw material MB value being within the four ranges, the control valve group is switched to open the feeding channel and the circulation branch, and the water spray module is controlled to start in the moisturizing mode and the kneading and dispersing module is started.

[0008] In one possible implementation, the controller is electrically connected to a cycle counter, which is used to monitor the number of times the same set of raw materials passes through the cycle branch; A drainage module is installed on the circulation branch, and the drainage module is used to drain the fluid in the circulation branch. The cycle counter and the drainage module are both electrically connected to the controller, which is further configured to: Preset loop count threshold; In response to the connection of the feeding channel and the circulation branch, and the number of cycles output by the circulation counter being less than the cycle count threshold, the water spray module is controlled to start in the moisturizing mode; In response to the connection of the feeding channel and the circulation branch, and the number of times the circulation counter outputs is equal to or greater than the circulation count threshold, the water spraying module is controlled to start in the pulse water spraying mode, and the drainage module is controlled to start.

[0009] In one possible implementation, the kneading and dispersing module includes: A telescopic bracket, fixedly mounted on the inner wall of the feeding channel, has a support arm for extending or retracting toward the central axis of the feeding channel; and A kneading column is rotatably connected to one side of the support arm; multiple guide grooves are spaced apart circumferentially on the outer wall of the kneading column, and a rubbing tooth is slidably inserted into each guide groove, with an elastic reset member between the rubbing tooth and the bottom of the corresponding guide groove.

[0010] In one possible implementation, a linear cylinder is fixedly mounted on the support arm, and the power output shaft of the linear cylinder is connected to the telescopic bracket. The kneading column is connected to a servo motor, which is fixedly mounted on the support arm. Both the linear cylinder and the servo motor are electrically connected to the controller, which is configured to: In response to the raw material MB value being within the first range, the linear cylinder is controlled to retract the support arm and the servo motor is not started. In response to the raw material MB value being within the second range, the linear cylinder is controlled to drive the support arm to extend a first preset distance and the servo motor is started. In response to the raw material MB value being within the three-level range, the linear cylinder is controlled to drive the support arm to extend a second preset distance and the servo motor is started. Wherein, the first preset distance is less than the second preset distance, and the rotational speed of the servo motor in the second gear range is less than its rotational speed in the third gear range.

[0011] In one possible implementation, the kneading column has an axially penetrating insertion hole, the central axis of which is coaxial with the central axis of the kneading column; The inner wall of the insertion hole has a groove, a transmission rod is inserted into the insertion hole, and the outer wall of the transmission rod has a protrusion that fits into the groove, so that when the transmission rod rotates, the kneading column rotates synchronously. Both ends of the transmission rod can be detachably connected to a limiting plate, and one of the limiting plates is connected to the servo motor.

[0012] In one possible implementation, an installation groove is formed on the inner wall of the feeding channel, and the installation groove is located on the opposite side of the telescopic bracket; the water spray module includes: A nozzle assembly is fixedly installed at the bottom of the mounting groove, with the spraying end facing the open end of the mounting groove; the nozzle assembly is connected to a water supply pipe, which passes through the feeding channel and extends outward, and is connected to a water supply tank; and A grille is slidably fitted into the mounting groove, located on the side of the nozzle assembly facing the opening of the mounting groove; a pressure sensor is provided between the grille and the feeding channel; When the kneading column rotates to the point where the kneading teeth abut against the grid, the kneading teeth retract, the elastic reset member undergoes elastic deformation, and the pressure sensor outputs a pressure value; The nozzle assembly and the pressure sensor are both electrically connected to the controller, which is configured to: Preset pressure threshold; In response to the raw material MB value being within the three-level range and the pressure value output by the pressure sensor being less than the pressure threshold, the nozzle assembly is controlled to standby. In response to the raw material MB value being within the three-level range and the pressure value output by the pressure sensor being equal to or greater than the pressure threshold, the nozzle assembly is controlled to start.

[0013] In one possible implementation, an elastic buffer is provided between the grille and the bottom of the mounting groove.

[0014] In one possible implementation, the inner wall of the feeding channel has a mounting screw, and the telescopic bracket has a positioning hole suitable for the mounting screw to pass through; A mounting nut is threaded onto the mounting screw. The mounting nut is used to abut against the telescopic bracket to limit the movement of the telescopic bracket relative to the feeding channel.

[0015] In one possible implementation, the tooth surface of the rolling teeth is provided with multiple convex cones along the length direction.

[0016] The beneficial effects of the desliming control system for manufactured sand provided in this application are as follows: the MB value of the raw material at the feed end of the feeding channel is detected by the MB value detection unit, and the controller compares the detection results with the preset first-level, second-level and third-level gears, thereby controlling the start-stop and operation mode of the kneading and dispersing module and the water spraying module.

[0017] Specifically: When the raw material's MB value is in the first range, only the continuous water spray mode is activated, using low-pressure water flow to complete the conventional desludge removal; when the MB value is in the second range, the kneading and dispersing module is activated on the basis of continuous water spray, using the periodic extrusion gaps to apply kneading force to the mud clumps, assisting in mechanical dispersing; when the MB value is in the third range, the pulse water spray mode is switched to and the kneading and dispersing module is activated simultaneously, and the timing of high-pressure water spraying and the timing of kneading force application are synchronized, using periodic pulse impact combined with kneading and extrusion to achieve efficient crushing of high MB value mud clumps under the premise of limited drainage.

[0018] The core of the above design lies in the graded decoupling of hydraulic impact and mechanical kneading, and the dynamic matching of desliming intensity according to the MB value of the raw material, while maintaining a consistent total drainage volume in each mode. Specifically, low MB value raw materials only require hydraulic rinsing to meet the desliming requirements, without additional energy consumption; medium MB value raw materials introduce kneading force to assist in dispersing, compensating for insufficient hydraulic shear force and avoiding blindly increasing water pressure to enhance the dispersing effect; high MB value raw materials adopt a pulse water spray mode, which, under the premise of constant total drainage volume, transforms continuous low-pressure water flow into intermittent high-pressure impact, and applies kneading force simultaneously at the moment of pulse release, so that the two forces are superimposed in time and complementary in direction, forming a concentrated crushing effect on the mud clumps. Since the total drainage volume of continuous mode and pulse mode is consistent within the preset time, the liquid flow rate of the downstream overflow desliming equipment does not increase due to the switching of pulse mode, thus avoiding the problem of instantaneous pressure rise in hydrocyclone and large loss of fine sand and stone powder caused by increasing water pressure and flow rate to improve desliming effect in traditional processes.

[0019] Compared with existing technologies, the desliming control system for manufactured sand provided in this application achieves precise matching between desliming intensity and raw material characteristics through MB value graded control and intelligent switching between continuous water spray mode and pulse water spray mode, combined with the synchronous application of kneading force. While ensuring the desliming effect of high MB value raw materials, it systematically solves the core problem of large loss of fine sand and stone powder caused by high pressure and high flow rate in traditional wet processes, and significantly improves the yield and quality stability of manufactured sand. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the manufactured sand desliming control system provided in the embodiments of this application; Figure 2This is a schematic diagram showing the electrical connection relationship of the controller used in the embodiments of this application; Figure 3 This is a three-dimensional structural diagram of the feeding channel and kneading and dispersing module used in the embodiments of this application in a combined state; Figure 4 This is a three-dimensional structural diagram of the telescopic support and feeding channel used in the embodiments of this application in a combined state; Figure 5 This is a partially enlarged schematic diagram of the telescopic support and feeding channel used in the embodiments of this application under an explosive state; Figure 6 This is a three-dimensional structural diagram of the telescopic bracket and support arm used in the embodiments of this application in a combined state; Figure 7 This is a schematic diagram of the combined structure of the support arm and linear cylinder used in the embodiments of this application; Figure 8 This is a three-dimensional structural diagram of the kneading column and kneading teeth used in the embodiments of this application in a combined state; Figure 9 This is a cross-sectional view of the kneading column and kneading teeth used in the embodiments of this application in a combined state; Figure 10 This is an exploded view of the rolling teeth and elastic reset member used in the embodiments of this application; Figure 11 This is a three-dimensional structural diagram of the kneading column used in the embodiments of this application; Figure 12 This is an exploded view of the transmission rod and limiting plate used in the embodiments of this application; Figure 13 This is an exploded view of the support arm, servo motor, and limit plate used in the embodiments of this application; Figure 14 This is a three-dimensional structural diagram of the feeding channel and water spray module used in the embodiments of this application in a combined state; Figure 15 This is a cross-sectional view of the feeding channel used in the embodiments of this application; Figure 16 This is one of the partial schematic diagrams of the feeding channel and water spraying module used in the embodiments of this application in a cross-sectional view; Figure 17 This is a second partial schematic diagram of the feeding channel and water spraying module used in the embodiments of this application in a cross-sectional view; Figure 18 This is a three-dimensional structural diagram of the grid, pressure sensor, and elastic buffer used in the embodiments of this application in a combined state; Figure 19This is a three-dimensional structural diagram of the nozzle assembly and water supply pipe used in the embodiments of this application in a combined state; Explanation of reference numerals in the attached drawings: 1. Telescopic bracket; 11. Support arm; 12. Linear cylinder; 13. Positioning hole; 2. Kneading column; 21. Guide groove; 22. Kneading teeth; 221. Convex cone; 23. Elastic reset component; 24. Servo motor; 25. Insertion hole; 251. Groove; 26. Transmission rod; 261. Convex ridge; 262. Limiting plate; 3. Nozzle assembly; 31. Water supply pipe; 4. Grille; 41. Pressure sensor; 42. Elastic buffer component; 10. Feeding channel; 101. Mounting groove; 102. Mounting screw; 103. Mounting nut; 20. Kneading and dispersing module; 30. Water spraying module; 40. Controller; 50. Circulation branch; 60. Control valve assembly; 70. Drainage module; 100. MB value detection unit; 200. Cycle counter. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0024] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] Please refer to the following: Figures 1 to 19The desliming control system for manufactured sand provided in this application will now be described. The desliming control system for manufactured sand proposed in this application includes a feeding channel 10, a kneading and dispersing module 20, a water spraying module 30, and a controller 40.

[0027] The feeding channel 10 is used for feeding raw materials. The feed end is equipped with an MB value detection unit 100 for outputting the MB value of the raw materials, and the discharge end is used to connect to the overflow desliming equipment. In actual use, the feeding channel 10 is used to transport the raw materials to the overflow desliming equipment according to a preset time.

[0028] The kneading and dispersing module 20 is installed inside the feeding channel 10 and is used to cooperate with the inner wall of the feeding channel 10 on its opposite side to form a periodically changing extrusion gap, so as to periodically apply kneading force to the raw material.

[0029] The water spray module 30 is located within the feeding channel 10, opposite the kneading and dispersing module 20. It has a continuous water spray mode that continuously sprays low-pressure water, and a pulse water spray mode that intermittently sprays high-pressure water. The total drainage volume of the continuous water spray mode and the pulse water spray mode is the same within the aforementioned preset time.

[0030] The controller 40 is electrically connected to the MB value detection unit 100, the kneading and dispersing module 20, and the water spraying module 30. The controller 40 is configured to: The preset MB values ​​are gradually increasing in three ranges: the first range, the second range, and the third range. In response to the raw material MB value being in the first range, the water spray module 30 is turned on in continuous water spray mode, and the kneading and dispersing module 20 is in standby mode. In response to the raw material MB value being in the second range, the water spray module 30 is turned on in continuous water spray mode, and the kneading and dispersing module 20 is started. In response to the raw material MB value being in the third range, the control water spray module 30 is turned on in pulse water spray mode, the kneading and dispersing module 20 is started, and the timing of high-pressure water spraying is synchronized with the timing of kneading force application.

[0031] The beneficial effects of the manufactured sand desliming control system provided in this application are as follows: The MB value detection unit 100 detects the MB value of the raw material at the feed end of the feeding channel 10. The controller 40 compares the detection result with the preset first, second and third ranges, and then controls the start, stop and operation modes of the kneading and dispersing module 20 and the water spraying module 30.

[0032] Specifically: When the MB value of the raw material is in the first range, only the continuous water spray mode is turned on, and the routine desliming is completed by using low-pressure water flow; When the MB value is in the second range, the kneading and dispersing module 20 is activated on the basis of continuous water spraying. The kneading force is applied to the mud ball by means of the periodic extrusion gap to assist in mechanical dispersing. When the MB value is in the third range, switch to pulse water spray mode and start the kneading and dispersing module 20 at the same time. The timing of high pressure water spraying and the timing of kneading force application are synchronized. The periodic pulse impact combined with kneading and squeezing can achieve efficient crushing of high MB value mud lumps under the premise of limited drainage.

[0033] The core of the above design lies in the graded decoupling of hydraulic impact and mechanical kneading, and the dynamic matching of desliming intensity according to the MB value of the raw material, while maintaining a consistent total drainage volume in each mode. Low MB value raw materials only require hydraulic rinsing to meet the desliming requirements, without additional energy consumption; medium MB value raw materials introduce kneading force to assist in dispersing, compensating for insufficient hydraulic shear force and avoiding blindly increasing water pressure to enhance the dispersing effect; high MB value raw materials adopt a pulse water spray mode, which transforms continuous low-pressure water flow into intermittent high-pressure impact while keeping the total drainage volume unchanged, and applies kneading force simultaneously at the moment of pulse release, so that the two forces are superimposed in time and complementary in direction, forming a concentrated breaking effect on the mud clumps.

[0034] Since the total drainage volume is the same in continuous mode and pulse mode within the preset time, the liquid flow rate of the back-end overflow desliming equipment does not increase due to the switching of pulse mode. This avoids the problem of instantaneous pressure increase of hydrocyclone and large loss of fine sand and stone powder caused by increasing water pressure and flow rate to improve desliming effect in traditional processes.

[0035] Compared with existing technologies, the desliming control system for manufactured sand provided in this application achieves precise matching between desliming intensity and raw material characteristics through MB value graded control and intelligent switching between continuous water spray mode and pulse water spray mode, combined with the synchronous application of kneading force. While ensuring the desliming effect of high MB value raw materials, it systematically solves the core problem of large loss of fine sand and stone powder caused by high pressure and high flow rate in traditional wet processes, and significantly improves the yield and quality stability of manufactured sand.

[0036] In some embodiments, such as Figure 1 and Figure 2 As shown, a circulation branch 50 is connected in parallel to the aforementioned feeding channel 10. The inlet of the circulation branch 50 is located behind the kneading and dispersing module 20, and is used to directionally discharge the mud clumps that have been processed by the kneading and dispersing module 20 and / or the water spraying module 30 to its own outlet. At the same time, the outlet of the feeding channel 10 is connected to the inlet of the feeding channel 10, so that the mud clumps discharged through the circulation branch 50 can be used as raw materials to participate in the detection of the MB value detection unit 100.

[0037] A control valve group 60 is connected to the feeding channel 10. By switching this control valve group 60, the feeding channel 10 can be connected to the overflow desliming equipment, or the feeding channel 10 can be connected to the circulation branch 50.

[0038] The aforementioned water spray module 30 also has a humidification mode that continuously sprays low-pressure water; within the aforementioned preset time, the total drainage volume of the humidification mode is (far) less than the total drainage volume of the continuous water spray mode, and under normal circumstances, the total drainage volume of the humidification mode can be ignored.

[0039] The control valve assembly 60 is electrically connected to the controller 40, which is further configured to: Four preset ranges are defined, and the MB values ​​corresponding to these four ranges are greater than the MB values ​​corresponding to the three-range. In response to the raw material MB value being in one of the first, second, and third ranges, switch control valve group 60 to connect the feeding channel 10 and the overflow desliming equipment; In response to the raw material MB value being in the fourth range, the control valve group 60 is switched to connect the feeding channel 10 and the circulation branch 50, the water spray module 30 is turned on in the moisturizing mode, and the kneading and dispersing module 20 is started.

[0040] The cooperation between the circulation branch 50 and the control valve assembly 60 provides a circulating pretreatment path for raw materials with extremely high MB values. The control valve assembly 60 can be a three-way directional valve or a combination of two two-way valves, and its switching action is automatically executed by the controller 40 according to the MB value level.

[0041] When the raw material's MB value is within the fourth range, it does not directly enter the overflow desliming equipment. Instead, it enters the circulation branch 50 for circulating kneading and moisturizing pretreatment. This allows the mud clumps to gradually loosen under repeated kneading and continuous moisturizing. Once the mud clumps are fully dispersed, it is then switched to the overflow desliming equipment. The total drainage volume in the moisturizing mode is less than that in the continuous spraying mode. The purpose is to replenish only the necessary water during the circulation process to maintain the raw material's moisture level, avoiding excessive water addition that could cause liquid accumulation in the circulation branch 50 and affect the overall drainage volume of the processing cycle.

[0042] In some embodiments, such as Figure 1 and Figure 2 As shown, the aforementioned controller 40 is also electrically connected to a cycle counter 200, which is used to monitor the number of times the same group of raw materials passes through the cycle branch 50.

[0043] A drainage module 70 is provided on the circulation branch 50, which is used to drain the fluid in the circulation branch 50.

[0044] Based on this, the cycle counter 200 and the drainage module 70 are both electrically connected to the controller 40, and the controller 40 is also configured as follows: Preset loop count threshold; In response to the feeding channel 10 and the circulation branch 50 being turned on, and the number of cycles output by the circulation counter 200 being less than the cycle count threshold, the water spray module 30 is controlled to start in moisturizing mode. In response to the activation of the feeding channel 10 and the circulation branch 50, and the output of the circulation counter 200 being equal to or greater than the circulation count threshold, the water spray module 30 is controlled to start in pulse water spray mode, and the drainage module 70 is controlled to start.

[0045] The cycle counter 200 is used to count the number of times the raw material circulates in the circulation branch 50. When the number of cycles reaches a preset threshold, it indicates that the reduction effect of kneading alone on the MB value of the raw material is limited. If the processing method is not switched at this time, the operating efficiency of the system will be greatly reduced. Specifically, when this happens, the controller 40 controls the water spray module 30 to switch to pulse water spray mode, using high-pressure pulse impact to completely peel the loosened mud clumps from the surface of the raw material, and simultaneously starts the drainage module 70 to discharge the muddy wastewater in the circulation branch 50 to avoid affecting the total drainage volume of this processing round.

[0046] In some embodiments, such as Figure 1 , Figure 6 and Figure 8 As shown, the kneading and dispersing module 20 includes a telescopic bracket 1 and a kneading column 2.

[0047] The telescopic bracket 1 is fixedly installed on the inner wall of the feeding channel 10 and has a support arm 11 for extending or retracting toward the central axis of the feeding channel 10.

[0048] The kneading column 2 is rotatably connected to one side of the support arm 11; multiple guide grooves 21 are spaced apart along the circumference on the outer wall of the kneading column 2, and each guide groove 21 is slidably inserted with a rubbing tooth 22, and there is an elastic reset member 23 between the rubbing tooth 22 and the bottom of the corresponding guide groove 21.

[0049] The kneading and dispersing module 20 controls the gap between the kneading column 2 and the inner wall of the feeding channel 10 through the telescopic bracket 1. When the support arm 11 extends, the kneading column 2 approaches the inner wall of the feeding channel 10, and the squeezing gap between the kneading teeth 22 and the inner wall decreases. When the kneading column 2 rotates, since the kneading column 2 and the feeding channel 10 are not coaxially arranged, the kneading column 2 can effectively knead the mud on the outer periphery, and each kneading tooth 22 passes through the squeezing gap in turn, applying periodic kneading pressure to the raw material passing through.

[0050] The kneading teeth 22 are retractable within the guide groove 21, allowing them to automatically retract when encountering larger particles or hard materials, preventing jamming or damage to the equipment. Furthermore, the elastic reset member 23 pushes the kneading teeth 22 back to their extended position after passing over a hard object, maintaining the kneading effect.

[0051] In some embodiments, such as Figures 6 to 8 , Figure 13As shown, a linear cylinder 12 is fixedly installed on the support arm 11. The power output shaft of the linear cylinder 12 is connected to the telescopic bracket 1 and is used to control the extension amount of the support arm 11 relative to the telescopic bracket 1.

[0052] The kneading column 2 is connected to a servo motor 24, which is fixedly mounted on the support arm 11 and is connected to the kneading column 2 via a gear set.

[0053] Both the linear cylinder 12 and the servo motor 24 are electrically connected to the controller 40, which is configured as follows: In response to the raw material MB value being in the first range, the linear cylinder 12 is controlled to drive the support arm 11 to retract, and the servo motor 24 is not started. In response to the raw material MB value being in the second range, the linear cylinder 12 is controlled to drive the support arm 11 to extend the first preset distance and the servo motor 24 is started. In response to the raw material MB value being in the third range, the linear cylinder 12 is controlled to drive the support arm 11 to extend the second preset distance and the servo motor 24 is started.

[0054] Among them, the first preset distance is less than the second preset distance, and the speed of the servo motor 24 in the second gear range is less than its speed in the third gear range.

[0055] In some embodiments, such as Figure 9 , Figure 11 and Figure 12 As shown, the kneading column 2 has an axially extending insertion hole 25, and the central axis of the insertion hole 25 is coaxially arranged with the central axis of the kneading column 2. Furthermore, the inner wall of the insertion hole 25 has a groove 251, and a transmission rod 26 is inserted into the insertion hole 25. The outer wall of the transmission rod 26 has a protrusion 261 that is embedded in the groove 251, so that when the transmission rod 26 rotates, the kneading column 2 rotates synchronously.

[0056] Both ends of the transmission rod 26 can be detachably connected to a limit plate 262, one of which is connected to the servo motor 24 for transmission.

[0057] The transmission structure achieves torque transmission through the engagement of the protrusion 261 and the groove 251, enabling the kneading column 2 and the transmission rod 26 to rotate synchronously. The limiting plate 262 axially limits the kneading column 2, preventing it from moving axially along the transmission rod 26 during rotation. Furthermore, since the transmission connection between the limiting plate 262 and the servo motor 24 is separable, and the transmission rod 26 and the limiting plate 262 are detachably coupled, the relevant structural parts of the kneading column 2 can be disassembled individually for easy maintenance, upkeep, and cleaning.

[0058] In some embodiments, such as Figures 14 to 19As shown, an installation groove 101 is provided on the inner wall of the feeding channel 10, and the installation groove 101 is located on the opposite side of the telescopic bracket 1. Based on this, the water spray module 30 includes a nozzle assembly 3 and a grid 4.

[0059] The nozzle assembly 3 is fixedly installed at the bottom of the mounting groove 101, with the spray end facing the opening of the mounting groove 101. This nozzle assembly 3 is connected to a water supply pipe 31, which passes through the feeding channel 10 and extends outward, and is connected to a water supply tank (not shown in the figure). In actual use, the nozzle assembly 3 can provide suction to draw water from the water supply tank and spray force to discharge it outward. The discharge of the spray force has three different efficiencies and operating modes, corresponding to the aforementioned continuous spray mode, pulse spray mode, and moisturizing mode, respectively.

[0060] The grille 4 is slidably fitted into the mounting groove 101, located on the side of the nozzle assembly 3 facing the opening of the mounting groove 101; and a pressure sensor 41 is provided between the grille 4 and the feeding channel 10.

[0061] When the kneading column 2 rotates until the kneading teeth 22 abut against the grid 4, the kneading teeth 22 retract and the elastic reset member 23 undergoes elastic deformation; simultaneously, the pressure sensor 41 outputs an instantaneous pressure value. Under normal circumstances, the pressure value at this time is the maximum value of the entire movement.

[0062] The nozzle assembly 3 and pressure sensor 41 are both electrically connected to the controller 40, which is configured as follows: Preset pressure threshold; In response to the raw material MB value being in the third range and the pressure value output by pressure sensor 41 being less than the pressure threshold, control nozzle group 3 to standby; In response to the raw material MB value being in the third range and the pressure value output by pressure sensor 41 being equal to or greater than the pressure threshold, the nozzle group 3 is controlled to start.

[0063] The coordinated design of the water spray module 30 and the kneading and dispersing module 20 achieves synchronization of pulsed water spray and kneading force. The grid 4 serves as a protective cover for the nozzle assembly 3, preventing raw materials from directly impacting the nozzles; on the other hand, it acts as the contact surface for the kneading teeth 22. When the kneading teeth 22 rotate to contact the grid 4, they squeeze the grid 4, and the pressure sensor 41 detects the pressure increase. Based on this, the controller 40 determines that kneading force is being applied and then controls the nozzle assembly 3 to start spraying water, achieving synchronous output of high-pressure water and kneading force.

[0064] When the toothed rollers 22 rotate past the grille 4, the pressure value output by the pressure sensor 41 decreases, and the controller 40 controls the nozzle assembly 3 to stop spraying water, creating a pulse effect. With this control method, no complex timing programming design is required; precise synchronization can be achieved solely through the feedback from the pressure sensor 41.

[0065] In some embodiments, such as Figures 14 to 18As shown, there is an elastic buffer 42 between the grille 4 and the bottom of the mounting groove 101.

[0066] The elastic buffer 42 absorbs the impact force when the kneading teeth 22 abut against the grid 4, preventing rigid collisions from damaging the grid 4 or the kneading teeth 22. It also protects the pressure sensor 41. Furthermore, the compression of the elastic buffer 42 can change with the abutting pressure of the kneading teeth 22, enabling the pressure sensor 41 to output a pressure value that varies with the kneading force, providing the controller 40 with richer feedback information.

[0067] In some embodiments, such as Figures 4 to 6 As shown, the inner wall of the feeding channel 10 has a mounting screw 102; correspondingly, the telescopic bracket 1 has a positioning hole 13 suitable for the mounting screw 102 to pass through.

[0068] A mounting nut 103 is threaded onto the mounting screw 102. The mounting nut 103 is used to abut against the telescopic bracket 1 to limit the movement of the telescopic bracket 1 relative to the feeding channel 10.

[0069] This mounting structure facilitates the positioning and fixing of the telescopic bracket 1 within the feeding channel 10. Specifically, after the mounting screw 102 passes through the positioning hole 13, the telescopic bracket 1 can be secured to the inner wall of the feeding channel 10 by tightening the mounting nut 103. For disassembly, simply loosen the mounting nut 103 to remove the bracket, facilitating individual maintenance and repair of each component of the system.

[0070] In some embodiments, such as Figures 8 to 10 As shown, the tooth surface of the rubbing tooth 22 is provided with multiple protruding cones 221 along the length direction. These protruding cones 221 are used to enhance the crushing effect of the rubbing tooth 22 on the mud.

[0071] When the rubbing teeth 22 cooperate with the inner wall of the feeding channel 10 or the grid 4 to squeeze the raw material, the convex cones 221 can penetrate into the mud clump, destroying the overall structure of the mud clump and making it easier to be dispersed by the water flow. At the same time, multiple convex cones 221 are distributed along the length of the rubbing teeth 22, which can form multiple points of concentrated stress in the contact area between the rubbing teeth 22 and the raw material, thereby improving the crushing efficiency.

[0072] The above content is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A desliming control system for manufactured sand, characterized in that, include: The feeding channel is used for feeding raw materials. The feed end is equipped with an MB value detection unit for outputting the MB value of the raw materials, and the discharge end is used to connect to the overflow desliming equipment. The feeding channel is used to transport the raw materials to the overflow desliming equipment at a preset time. The kneading and dispersing module is set inside the feeding channel to cooperate with the inner wall of the feeding channel on the opposite side to form a periodically changing extrusion gap, so as to periodically apply kneading force to the raw material; The water spraying module is located in the feeding channel, on the opposite side of the kneading and dispersing module. It has a continuous water spraying mode that continuously sprays low-pressure water and a pulse water spraying mode that intermittently sprays high-pressure water. The total drainage volume of the continuous water spraying mode and the pulse water spraying mode is the same within the preset time. as well as The controller, electrically connected to the MB value detection unit, the kneading and dispersing module, and the water spraying module, is configured to: preset a first-level range, a second-level range, and a third-level range where the MB value gradually increases; in response to the raw material's MB value being in the first-level range, control the water spraying module to start in the continuous water spraying mode, and the kneading and dispersing module to standby; in response to the raw material's MB value being in the second-level range, control the water spraying module to start in the continuous water spraying mode, and the kneading and dispersing module to start; in response to the raw material's MB value being in the third-level range, control the water spraying module to start in the pulse water spraying mode, and the kneading and dispersing module to start, with the timing of high-pressure water spraying synchronized with the timing of kneading force application.

2. The manufactured sand desliming control system as described in claim 1, characterized in that, A circulation branch is connected in parallel to the feeding channel; the inlet of the circulation branch is located behind the kneading and dispersing module, and the outlet is connected to the inlet of the feeding channel. A control valve group is connected to the feeding channel. The control valve group is used to connect the feeding channel and the overflow desliming equipment, or to connect the feeding channel and the circulation branch. The water spray module also has a humidification mode that continuously sprays low-pressure water; within the preset time, the total drainage volume of the humidification mode is less than the total drainage volume of the continuous water spray mode. The control valve assembly is electrically connected to the controller, and the controller is further configured to: Four preset ranges are defined, and the MB values ​​corresponding to the four ranges are greater than the MB values ​​corresponding to the three ranges. In response to the raw material MB value being in one of the first, second, and third ranges, the control valve group is switched to open the feeding channel and the overflow desliming device; In response to the raw material MB value being within the four ranges, the control valve group is switched to open the feeding channel and the circulation branch, and the water spray module is controlled to start in the moisturizing mode and the kneading and dispersing module is started.

3. The manufactured sand desliming control system as described in claim 2, characterized in that, The controller is electrically connected to a cycle counter, which is used to monitor the number of times the same group of raw materials passes through the cycle branch; A drainage module is installed on the circulation branch, and the drainage module is used to drain the fluid in the circulation branch. The cycle counter and the drainage module are both electrically connected to the controller, which is further configured to: Preset loop count threshold; In response to the connection of the feeding channel and the circulation branch, and the number of times the circulation counter outputs is less than the circulation number threshold, the water spray module is controlled to start in the moisturizing mode; In response to the connection of the feeding channel and the circulation branch, and the number of times the circulation counter outputs is equal to or greater than the circulation count threshold, the water spraying module is controlled to start in the pulse water spraying mode, and the drainage module is controlled to start.

4. The manufactured sand desliming control system as described in claim 1, characterized in that, The kneading and dispersing module includes: A telescopic bracket, fixedly mounted on the inner wall of the feeding channel, has a support arm for extending or retracting toward the central axis of the feeding channel; and A kneading column is rotatably connected to one side of the support arm; multiple guide grooves are spaced apart circumferentially on the outer wall of the kneading column, and a rubbing tooth is slidably inserted into each guide groove, with an elastic reset member between the rubbing tooth and the bottom of the corresponding guide groove.

5. The manufactured sand desliming control system as described in claim 4, characterized in that, A linear cylinder is fixedly installed on the support arm, and the power output shaft of the linear cylinder is connected to the telescopic bracket. The kneading column is connected to a servo motor, which is fixedly mounted on the support arm. Both the linear cylinder and the servo motor are electrically connected to the controller, which is configured to: In response to the raw material MB value being within the first range, the linear cylinder is controlled to retract the support arm and the servo motor is not started. In response to the raw material MB value being within the second range, the linear cylinder is controlled to drive the support arm to extend a first preset distance and the servo motor is started. In response to the raw material MB value being within the three-level range, the linear cylinder is controlled to drive the support arm to extend a second preset distance and the servo motor is started. Wherein, the first preset distance is less than the second preset distance, and the rotational speed of the servo motor in the second gear range is less than its rotational speed in the third gear range.

6. The manufactured sand desliming control system as described in claim 5, characterized in that, The kneading column has an axially penetrating insertion hole, and the central axis of the insertion hole is coaxial with the central axis of the kneading column. The inner wall of the insertion hole has a groove, a transmission rod is inserted into the insertion hole, and the outer wall of the transmission rod has a protrusion that fits into the groove, so that when the transmission rod rotates, the kneading column rotates synchronously. Both ends of the transmission rod can be detachably connected to a limiting plate, and one of the limiting plates is connected to the servo motor.

7. The desliming control system for manufactured sand as described in any one of claims 4-6, characterized in that, An installation groove is provided on the inner wall of the feeding channel, and the installation groove is located on the opposite side of the telescopic bracket; the water spray module includes: A nozzle assembly is fixedly installed at the bottom of the mounting groove, with the spraying end facing the open end of the mounting groove; the nozzle assembly is connected to a water supply pipe, which passes through the feeding channel and extends outward, and is connected to a water supply tank; and A grille is slidably fitted into the mounting groove, located on the side of the nozzle assembly facing the opening of the mounting groove; a pressure sensor is provided between the grille and the feeding channel; When the kneading column rotates to the point where the kneading teeth abut against the grid, the kneading teeth retract, the elastic reset member undergoes elastic deformation, and the pressure sensor outputs a pressure value; The nozzle assembly and the pressure sensor are both electrically connected to the controller, which is configured to: Preset pressure threshold; In response to the raw material MB value being within the three-level range and the pressure value output by the pressure sensor being less than the pressure threshold, the nozzle assembly is controlled to standby. In response to the raw material MB value being within the three-level range and the pressure value output by the pressure sensor being equal to or greater than the pressure threshold, the nozzle assembly is controlled to start.

8. The manufactured sand desliming control system as described in claim 7, characterized in that, An elastic buffer is provided between the grille and the bottom of the mounting groove.

9. The desliming control system for manufactured sand as described in any one of claims 4-6, characterized in that, The inner wall of the feeding channel has a mounting screw, and the telescopic bracket has a positioning hole suitable for the mounting screw to pass through; A mounting nut is threaded onto the mounting screw. The mounting nut is used to abut against the telescopic bracket to limit the movement of the telescopic bracket relative to the feeding channel.

10. The desliming control system for manufactured sand as described in any one of claims 4-6, characterized in that, The tooth surface of the rolling teeth is provided with multiple convex cones along its length.

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