High-strength stone sand production wastewater recycling treatment device

Abstract

The application discloses a kind of high-strength stone sand production wastewater reuse treatment device, it is related to wastewater recovery processing technical field, including dehydration screen and at least one hydrocyclone, hydrocyclone is located above dehydration screen and is fixedly connected with it, dehydration screen includes screen mesh located below hydrocyclone, the lower portion of screen mesh is provided with the monitoring assembly corresponding with hydrocyclone, monitoring assembly includes water collecting tank, first filter screen, baffle, support, trigger mechanism and position sensor.The application is by setting water collecting tank that can move up and down, trigger mechanism, position sensor and counter, so that central control unit is based on the data of multiple drainage periods accumulated in a complete period (for example, several hours or a shift) Analysis can accurately determine the change trend of screen water flow and sediment deposition, rather than relying on only one isolated data point, so that the judgment result is more objective and accurate.

Description

Technical Field

[0001] This invention relates to the field of wastewater recycling and treatment technology, and in particular to a wastewater recycling and treatment device for high-strength stone and sand production. Background Technology

[0002] In the production of high-strength aggregates, hydrocyclones are typically used in conjunction with dewatering screens to recover and treat fine sand from the wastewater. Specifically, the hydrocyclone separates the wastewater into an underflow rich in fine sand and an overflow rich in mud and powder. The underflow enters the dewatering screen for dewatering, and the dewatered fine sand is recovered as the finished product. Meanwhile, the mud and water discharged from the overflow outlet of the hydrocyclone enters subsequent treatment processes such as concentration and filtration, thereby achieving the recycling of water resources.

[0003] However, the underflow port of the hydrocyclone, as a key and vulnerable component, is subjected to long-term erosion and wear from the high-speed sand-water mixture. This causes the orifice diameter of the underflow port to gradually increase, leading to coarse sand runoff—that is, coarse sand that should have been discharged from the underflow port mixes with the overflow liquid, causing fine sand to be lost. At the same time, a large amount of coarse sand enters the downstream wastewater treatment system, exacerbating the wear of the filter cloth and damage to the filter plates of the filter press. Conversely, when the underflow port becomes blocked or is undersized, it will lead to fine sand runoff—that is, a large amount of ultrafine mud powder enters the underflow port and eventually mixes into the finished sand, causing the finished sand to have excessive mud content, seriously affecting the quality of concrete. Existing technologies generally rely on manual experience to instantly observe and judge the ejection pattern of the hydrocyclone underflow orifice. Operators can only roughly infer whether coarse or fine sand has been lost at a certain moment based on whether the material discharged from the underflow orifice spreads in an umbrella shape or concentrates in a column. Since it is impossible to collect continuous and quantitative data on the underflow state, this judgment not only relies heavily on personal experience, but also cannot capture the gradual change process of the underflow orifice diameter caused by long-term wear. When the abnormal pattern that is visible to the naked eye appears, the problem of fine sand loss or deterioration of the quality of finished sand has often lasted for a considerable period of time, causing actual losses and making maintenance work always a passive situation of remediation after the fact.

[0004] Furthermore, even if electronic sensors (such as level switches, solenoid valves, turbidity meters, etc.) are used for automated monitoring, the failure rate of these electronic components is extremely high in sand making sites with high humidity, high dust, and strong vibration. Their measurement references will frequently drift due to mud contamination, probe scaling, vibration loosening, etc., resulting in distorted monitoring data and frequent false alarms. Not only can they not provide reliable continuous monitoring data, but they also increase a lot of maintenance work.

[0005] To address these issues, this invention proposes a wastewater reuse treatment device for high-strength stone and sand production. Summary of the Invention

[0006] The purpose of this invention is to provide a wastewater reuse treatment device for high-strength stone and sand production, so as to solve the technical problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a wastewater reuse treatment device for high-strength sand and gravel production, comprising a dewatering screen and at least one hydrocyclone, wherein the hydrocyclone is located above and fixedly connected to the dewatering screen, the dewatering screen includes a screen mesh located below the hydrocyclone, and a monitoring component corresponding to the hydrocyclone is disposed below the screen mesh, the monitoring component comprising: A water collection tank, which can be moved up and down below the screen, is used to collect the water that has passed through the screen after being discharged from the cyclone separator and separated by the screen. The first filter screen is located on the lower side wall of the water collection tank to filter out mud and sand in the water. Two baffles are provided and are located on the outer side wall of the water collection tank. In the initial state of the water collection tank, the baffles can block the first filter screen. The support members are provided in two and are located at both ends of the water collection tank to support the movement of the water collection tank under changes in gravity. The two support members are respectively provided with triggering mechanisms inside. A position sensor is disposed on one side of the water collection tank to detect the vertical position of the water collection tank.

[0008] Preferably, the dewatering screen further includes a water tank located below the screen mesh, the support includes a fixed cylinder fixedly connected to the water tank, a connecting rod slidably connected inside the fixed cylinder, one end of the connecting rod passing through the fixed cylinder and fixedly connected to the water collection tank, and a first elastic element is provided between the inner wall of the fixed cylinder and the connecting rod.

[0009] Preferably, the triggering mechanism includes a mounting block disposed on the circumferential side of the fixed cylinder, the mounting block having a cavity communicating with the fixed cylinder inside, a wedge block slidably connected inside the cavity, the wedge block having symmetrical upper and lower inclined sides, and a second elastic element disposed between the wedge block and the cavity.

[0010] Preferably, the bottom of the water collection tank is provided with a flip-up bottom plate, which opens after a delay after the water collection tank is reset, for discharging the mud and sand deposited at the bottom of the water collection tank.

[0011] Preferably, it further includes a delay mechanism, which is disposed on the side wall of the water collection tank and is used to trigger the bottom plate to flip after a preset time following the reset of the water collection tank; The delay mechanism includes a first hydraulic cylinder fixedly connected to a water collection tank. A first piston rod is slidably connected inside the first hydraulic cylinder. A crossbar is fixedly connected to one end of the first piston rod that passes through the first hydraulic cylinder. The crossbar is located on the side near the bottom plate's flipping fulcrum and contacts the bottom plate. A first liquid supply device is externally connected to the first hydraulic cylinder through a pipe.

[0012] Preferably, the water collection tank is provided with a flow-slowing mechanism inside, which is used to guide the screened water entering the water collection tank to the side wall of the water collection tank to avoid the water flow directly impacting the bottom of the water collection tank; The flow control mechanism includes two symmetrically arranged lower inclined plates that are fixedly connected to the side wall of the water collection tank, and a guide plate located in the middle of the water collection tank is provided below the two lower inclined plates.

[0013] Preferably, each of the two baffles is provided with a backflushing mechanism. The backflushing mechanism includes a water storage box fixedly connected to the baffle. A drain groove corresponding to the first filter screen is opened on one side of the water storage box. The top of the water storage box is inclined and a second filter screen is fixedly connected to it. A rotating plate is rotatably connected to the top of the baffle. An elastic member is provided between the two rotating plates. A pull rod matching the elastic member is fixedly connected to the water collection groove. When the water collection groove moves down, the two rotating plates can close under the action of the elastic member. A third elastic member is provided between the two rotating plates and the baffle.

[0014] Preferably, the bottom of the two water storage boxes is provided with a horizontal groove, and a movable plate matching the drain tank is slidably connected in the horizontal groove. A control component is provided on one side of each of the two water storage boxes. The control component can control the movable plate to slide in the horizontal groove, so that the drain tank is opened or closed. The control component includes a second hydraulic cylinder fixedly connected to a water storage box. A second piston rod is slidably connected inside the second hydraulic cylinder. One end of the second piston rod passes through the second hydraulic cylinder and is fixedly connected to a moving plate. A second liquid supply device is externally connected to the second hydraulic cylinder through a pipe.

[0015] Preferably, it also includes a counter, which is connected to the wedge block or the water collection tank, and is used to record the number of times the water collection tank drains per unit time; The position sensor is a non-contact displacement sensor used to continuously detect the deviation between the position of the water collection tank after reset and the initial position.

[0016] Preferably, it also includes a central control unit, which is electrically connected to the position sensor and the counter respectively, and is used to determine the working status of the hydrocyclone based on the deviation value detected by the position sensor and the number of drainages recorded by the counter; Specifically, when the number of drainage cycles increases and the deviation value decreases, the hydrocyclone is determined to be in a coarse flow state; when the number of drainage cycles decreases and the deviation value increases, the hydrocyclone is determined to be in a fine flow state.

[0017] The beneficial effects of this invention are: This invention, by incorporating a vertically movable water collection tank, triggering mechanism, position sensor, and counter, enables the central control unit to analyze data accumulated over a complete time period (e.g., several hours or a shift) across multiple drainage cycles. This allows for precise judgment of the changing trends in screening water flow and sediment deposition, rather than relying solely on a single isolated data point, resulting in more objective and accurate assessments. Furthermore, by continuously monitoring the changing trends in drainage frequency and reset deviation values, it can keenly detect subtle signal shifts in the early stages of anomalies. For example, when the underflow outlet begins to wear, the decrease in the reset deviation value (sediment deposition) may be small. However, if this downward trend persists over multiple drainage cycles, the central control unit can issue an early warning, prompting operators to check the underflow outlet. This ability to identify gradual trends transforms maintenance from reactive remediation to predictive maintenance, preventing production interruptions and equipment damage caused by sudden coarse or fine water flow. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a wastewater reuse treatment device for high-strength stone and sand production according to the present invention.

[0019] Figure 2 This is a schematic cross-sectional view of the dewatering screen and hydrocyclone of the present invention.

[0020] Figure 3 This is a three-dimensional structural diagram of the monitoring component of the present invention.

[0021] Figure 4 This is a schematic diagram of the monitoring component and delay mechanism of the present invention.

[0022] Figure 5 This is a cross-sectional view of the water collection tank and water storage box of the present invention.

[0023] Figure 6 This is a cross-sectional view of the water collection tank of the present invention from another angle.

[0024] Figure 7 for Figure 6 A magnified view of the area along direction A.

[0025] The attached figures are labeled as follows: 1. Dewatering screen; 11. Screen mesh; 12. Water tank; 2. Hydrocyclone; 3. Monitoring component; 31. Water collection tank; 32. First filter screen; 33. Baffle; 34. Support component; 341. Fixing cylinder; 342. Connecting rod; 343. First elastic element; 35. Triggering mechanism; 351. Mounting block; 352. Cavity; 353. Wedge block; 354. Second elastic element; 36. Base plate; 4. Delay mechanism; 41. First hydraulic cylinder; 42. First piston rod; 43. Crossbar; 5. Flow control mechanism; 51. Lower inclined plate; 52. Guide plate; 6. Backflushing mechanism; 61. Water storage box; 62. Drainage trough; 63. Second filter screen; 64. Rotating plate; 65. Elastic component; 66. Pull rod; 67. Horizontal groove; 68. Moving plate; 69. Control component; 691. Second hydraulic cylinder; 692. Second piston rod. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0027] However, the underflow port of the hydrocyclone, as a key and vulnerable component, is subjected to long-term erosion and wear from the high-speed sand-water mixture. This causes the orifice diameter of the underflow port to gradually increase, leading to coarse sand runoff—that is, coarse sand that should have been discharged from the underflow port mixes with the overflow liquid, causing fine sand to be lost. At the same time, a large amount of coarse sand enters the downstream wastewater treatment system, exacerbating the wear of the filter cloth and damage to the filter plates of the filter press. Conversely, when the underflow port becomes blocked or is undersized, it will lead to fine sand runoff—that is, a large amount of ultrafine mud powder enters the underflow port and eventually mixes into the finished sand, causing the finished sand to have excessive mud content, seriously affecting the quality of concrete. Existing technologies generally rely on manual experience to instantly observe and judge the ejection pattern of the hydrocyclone underflow orifice. Operators can only roughly infer whether coarse or fine sand has been lost at a certain moment based on whether the material discharged from the underflow orifice spreads in an umbrella shape or concentrates in a column. Since it is impossible to collect continuous and quantitative data on the underflow state, this judgment not only relies heavily on personal experience, but also cannot capture the gradual change process of the underflow orifice diameter caused by long-term wear. When the abnormal pattern that is visible to the naked eye appears, the problem of fine sand loss or deterioration of the quality of finished sand has often lasted for a considerable period of time, causing actual losses and making maintenance work always a passive situation of remediation after the fact.

[0028] Furthermore, even if electronic sensors (such as level switches, solenoid valves, turbidity meters, etc.) are used for automated monitoring, the failure rate of these electronic components is extremely high in sand making sites with high humidity, high dust, and strong vibration. Their measurement references will frequently drift due to mud contamination, probe scaling, vibration loosening, etc., resulting in distorted monitoring data and frequent false alarms. Not only can they not provide reliable continuous monitoring data, but they also increase a lot of maintenance work.

[0029] This embodiment was invented to solve the above problems.

[0030] Please see Figures 1 to 7 As shown, an embodiment of the present invention provides a wastewater reuse treatment device for high-strength sand and gravel production, including a dewatering screen 1 and at least one hydrocyclone 2. In this embodiment, two symmetrically arranged hydrocyclones 2 are provided. The hydrocyclones 2 are located above the dewatering screen 1 and are fixedly connected to it. The dewatering screen 1 includes a screen 11 located below the hydrocyclone 2. A monitoring component 3 corresponding to the hydrocyclone 2 is provided below the screen 11. The monitoring component 3 includes a water collection tank 31, a first filter screen 32, a baffle 33, a support member 34, a triggering mechanism 35, and a position sensor.

[0031] The water collection tank 31 is movable up and down below the screen 11 to collect the water discharged from the cyclone 2 and separated by the screen 11.

[0032] The first filter screen 32 is located on the lower side wall of the water collection tank 31 to filter out mud and sand in the water.

[0033] Two baffles 33 are provided and are located on the outer side of the side wall of the water collection tank 31 respectively. In the initial state of the water collection tank 31, the baffles 33 can block the first filter screen 32.

[0034] Two support members 34 are provided and located at both ends of the water collection tank 31 to support the movement of the water collection tank 31 under changes in gravity. The dewatering screen 1 also includes a water tank 12 located below the screen 11. The support member 34 includes a fixed cylinder 341 fixedly connected to the water tank 12. A connecting rod 342 is slidably connected inside the fixed cylinder 341. The cross-section of the connecting rod 342 is T-shaped. A boss is provided at one end inside the fixed cylinder 341. In the initial position of the water collection tank 31, the boss does not contact the inclined side of the wedge block 353. One end of the connecting rod 342 passes through the fixed cylinder 341 and is fixedly connected to the water collection tank 31. A first elastic member 343 is provided between the inner wall of the fixed cylinder 341 and the connecting rod 342.

[0035] The two support members 34 are respectively provided with triggering mechanisms 35. The triggering mechanism 35 includes a mounting block 351 provided on the circumferential side of the fixed cylinder 341. The mounting block 351 is provided with a cavity 352 communicating with the fixed cylinder 341. A wedge block 353 is slidably connected in the cavity 352. The wedge block 353 has symmetrical upper and lower inclined sides. A second elastic member 354 is provided between the wedge block 353 and the cavity 352.

[0036] A position sensor is installed on one side of the water collection tank 31 to detect the vertical position of the water collection tank 31.

[0037] The bottom of the water collection tank 31 is provided with a flip-up bottom plate 36. The bottom plate 36 opens after a delay after the water collection tank 31 is reset, so as to discharge the mud and sand deposited at the bottom of the water collection tank 31.

[0038] It also includes a delay mechanism 4, which is disposed on the side wall of the water collection tank 31 and is used to trigger the bottom plate 36 to flip after a preset time is delayed after the water collection tank 31 is reset. The delay mechanism 4 includes a first hydraulic cylinder 41 fixedly connected to the water collection tank 31. A first piston rod 42 is slidably connected inside the first hydraulic cylinder 41. A crossbar 43 is fixedly connected to one end of the first piston rod 42 that passes through the first hydraulic cylinder 41. The crossbar 43 is located on the side near the flipping fulcrum of the base plate 36 and contacts the base plate 36. A first liquid supply device is connected to the first hydraulic cylinder 41 through a pipe. In this embodiment, the first liquid supply device is a hydraulic pump station, which is used to supply pressurized oil to the first hydraulic cylinder 41 to drive the first piston rod 42 to extend. When it is necessary to retract the first piston rod 42, the first liquid supply device reverses the oil flow.

[0039] The water collection tank 31 is equipped with a flow-slowing mechanism 5, which guides the screened water entering the water collection tank 31 to the side wall of the water collection tank 31 to prevent the water flow from directly impacting the bottom of the water collection tank 31. The flow control mechanism 5 includes two symmetrically arranged lower inclined plates 51 that are fixedly connected to the side wall of the water collection tank 31, and a guide plate 52 located in the middle of the water collection tank 31 is provided below the two lower inclined plates 51.

[0040] It also includes a counter, which is connected to the wedge block 353 or the water collection tank 31, and is used to record the number of times the water collection tank 31 drains per unit time; The position sensor is a non-contact displacement sensor used to continuously detect the deviation between the position of the water collection tank 31 after reset and the initial position.

[0041] It also includes a central control unit, which is electrically connected to the position sensor and the counter respectively, and is used to determine the working status of the hydrocyclone 2 based on the deviation value detected by the position sensor and the number of drainages recorded by the counter. Specifically, when the number of drainage cycles increases and the deviation value decreases, it is determined that the hydrocyclone 2 is in a coarse running state; when the number of drainage cycles decreases and the deviation value increases, it is determined that the hydrocyclone 2 is in a fine running state.

[0042] In this embodiment, the counter is installed inside the triggering mechanism 35, and the counter adopts a mechanical contact counter or a non-contact Hall sensor counter. When the wedge block 353 moves into the cavity 352 under the push of the boss of the connecting rod 342, the outer end of the wedge block 353 contacts the contact of the counter, or triggers the change of the magnetic field of the Hall sensor, thereby generating a counting signal. Two counting signals represent one action cycle, that is, the water collection tank 31 completes drainage and reset. This data reflects the flow rate of the screened water. The more times the drainage is performed, the greater the amount of screened water per unit time.

[0043] The position sensor is a non-contact displacement sensor, preferably a laser displacement sensor. The position sensor is fixedly installed on the side wall of the water tank 12 or the bottom of the fixed cylinder 341, with its detection end facing the upper surface of the water collection tank 31 or the end of the connecting rod 342. After the water collection tank 31 completes drainage and resets upward each time, the position sensor detects the current vertical position of the water collection tank 31 or the connecting rod 342 and sends the position signal to the central control unit. The central control unit compares the position signal with the pre-stored initial position (i.e., the standard position of the water collection tank 31 when it is unloaded and without sediment deposition) and calculates the deviation value between the reset position and the initial position.

[0044] In use, initially, the water collection trough 31 is at its highest position, the baffle 33 blocks the first filter screen 32, and the protrusion on the connecting rod 342 does not contact the inclined side of the wedge block 353. When the sand-water mixture discharged from the hydrocyclone 2 is separated by the screen 11 of the dewatering screen 1, the filtered water falls into the water collection trough 31 and is guided to both sides of the water collection trough 31 by the slow-flow mechanism 5 to avoid direct impact on the bottom. As the filtered water is continuously injected, the weight of the water collection trough 31 gradually increases, and the water collection trough 31 gradually moves downward under the action of gravity until the protrusion of the connecting rod 342 contacts the inclined side of the wedge block 353. At this point, the moving speed of the water collection trough 31 decreases or even stops briefly. As the amount of water passing through the screen in the tank 31 continues to increase, the downward force exerted by the boss on the connecting rod 342 on the inclined side of the wedge block 353 continues to increase. When this force overcomes the elastic force of the second elastic element 354, the wedge block 353 moves to one side of the cavity 352, the connecting rod 342 loses its constraint and the water collection tank 31 drops instantly until the first elastic element 343 is compressed to its limit. At the same time, once the connecting rod 342 breaks through the limit of the wedge block 353, the baffle 33 can no longer block the first filter screen 32, so that the sewage inside the water collection tank 31 is quickly discharged through the first filter screen 32 and enters the water tank 12. Meanwhile, the movement of the wedge block 353 triggers the counter to record a drainage action.

[0045] During the drainage process, the total weight of the water collection tank 31 gradually decreases and returns to its original position under the action of the first elastic element 343. At this time, the boss of the connecting rod 342 contacts the lower inclined edge of the wedge block 353. After the drainage is completed, the connecting rod 342 overcomes the elastic force of the wedge block 353 and the second elastic element 354 under the action of the first elastic element 343, and then resets the water collection tank 31. However, since the bottom of the water collection tank 31 is deposited with mud and sand that failed to be discharged through the first filter screen 32, the highest position of the water collection tank 31 after reset is lower than the initial position. The position sensor detects this deviation value and transmits the signal to the central control unit. At the same time, the number of drainages per unit time recorded by the counter is also transmitted to the central control unit. The central control unit determines whether the hydrocyclone 2 is in a coarse or fine state based on the trend of the deviation value and the number of drainages: when the number of drainages increases and the deviation value decreases, it indicates that the flow rate of the screened water increases and the amount of mud and sand deposited decreases, and it is judged to be coarse; when the number of drainages decreases and the deviation value increases, it indicates that the flow rate of the screened water decreases and the amount of mud and sand deposited increases, and it is judged to be fine.

[0046] After the position sensor and counter send the corresponding signals to the central control unit (about 3 seconds later), the delay mechanism 4 starts to work. The first liquid supply device supplies liquid to the first hydraulic cylinder 41, the first piston rod 42 extends and pushes the crossbar 43 to move downward. Under the action of gravity, the bottom plate 36 flips down and opens around the flipping fulcrum. The mud and sand deposited at the bottom of the water collection tank 31 are discharged under the action of gravity. After the mud is discharged, the first liquid supply device reverses the pumping action, the first piston rod 42 retracts and the crossbar 43 presses the bottom plate 36 to close it again, preparing for the next working cycle.

[0047] In summary, by setting up a vertically movable water collection tank 31, a triggering mechanism 35, a position sensor, and a counter, the present invention enables the central control unit to analyze data accumulated over a complete period of time (e.g., several hours or a shift) from multiple drainage cycles. This allows for accurate determination of the changing trends of the sieve water flow and sediment deposition, rather than relying solely on a single isolated data point, making the judgment results more objective and accurate.

[0048] Furthermore, by continuously monitoring the changing trends of drainage frequency and reset deviation value, it is possible to keenly detect subtle signal deviations in the early stages of anomalies. For example, when the underflow outlet just begins to wear, the decrease in the reset deviation value (sediment deposition) may be small. However, if this downward trend persists for several consecutive drainage cycles, the central control unit can issue an early warning, prompting operators to check the underflow outlet. This ability to identify gradual trends transforms maintenance work from reactive remediation to predictive maintenance, avoiding production interruptions and equipment damage caused by sudden coarse or fine run-throughs.

[0049] In addition, the logic of using two parameters, namely the number of drainage cycles and the reset deviation value, is adopted. Only when the two parameters show opposite trends (the number of drainage cycles increases and the deviation value decreases, or the number of drainage cycles decreases and the deviation value increases), it is determined to be either coarse or fine running. This cross-validation mechanism effectively filters out the random fluctuations of a single parameter, further improving the accuracy and reliability of anomaly judgment and avoiding unnecessary downtime and maintenance caused by false alarms. Example 2

[0050] In actual use, it was found that relying solely on the first filter screen 32 to filter mud and sand, some fine mud and sand may still adhere to the surface of the first filter screen 32 or form clumps at the bottom of the water collection tank 31. After long-term accumulation, this will affect the water permeability of the first filter screen 32. At the same time, when relying solely on the bottom plate 36 to turn over and discharge mud, some residual mud and sand may not be completely discharged due to lack of flushing, causing the bottom of the water collection tank 31 to gradually accumulate, which in turn affects the accuracy of the position sensor detection.

[0051] Further improvements were made based on the above embodiments.

[0052] Please see Figures 3 to 7 As shown, two baffles 33 are respectively provided with a backwash mechanism 6. The backwash mechanism 6 includes a water storage box 61 fixedly connected to the baffle 33. A drain groove 62 corresponding to the first filter screen 32 is opened on one side of the water storage box 61. The top of the water storage box 61 is inclined and a second filter screen 63 is fixedly connected to it. A rotating plate 64 is rotatably connected to the top of the baffle 33. An elastic member 65 is provided between the two rotating plates 64. A pull rod 66 matching the elastic member 65 is fixedly connected to the water collection groove 31. When the water collection groove 31 moves down, the two rotating plates 64 can close under the action of the elastic member 65. A third elastic member is provided between the two rotating plates 64 and the baffle 33. In this embodiment, the third elastic member is a torsion spring. The torsion spring can drive the two rotating plates 64 to reset.

[0053] It should be noted that in the initial state, the two rotating plates 64 are expanded outward in a trumpet-shaped structure. This arrangement not only increases the collection area of ​​the water collection tank 31, but also allows the rotating plates 64 to block the top of the second filter screen 63, preventing the filtered water from falling onto the second filter screen 63 unnecessarily and reducing the probability of the second filter screen 63 becoming clogged.

[0054] The bottom of the two water storage boxes 61 is provided with a horizontal groove 67. A movable plate 68 matching the drain trough 62 is slidably connected in the horizontal groove 67. A control component 69 is provided on one side of each of the two water storage boxes 61. The control component 69 can control the movable plate 68 to slide in the horizontal groove 67, so that the drain trough 62 is opened or closed. The control component 69 includes a second hydraulic cylinder 691 fixedly connected to the water storage box 61. A second piston rod 692 is slidably connected inside the second hydraulic cylinder 691. One end of the second piston rod 692 passes through the second hydraulic cylinder 691 and is fixedly connected to the moving plate 68. A second liquid supply device is externally connected to the second hydraulic cylinder 691 through a pipe. In this embodiment, the second liquid supply device is a micro hydraulic pump, which is electrically connected to the central control unit. It is used to supply liquid to the second hydraulic cylinder 691 at a preset time point to drive the second piston rod 692 to extend, thereby opening the drain tank 62. After the backflushing is completed, the second liquid supply device reverses the liquid flow, causing the second piston rod 692 to retract and close the drain tank 62.

[0055] It is important to note that the position sensor continuously monitors the position deviation value after each water collection tank 31 is reset and transmits the data to the central control unit in real time. The central control unit can verify the backflushing effect by comparing the change in deviation value before and after the backflushing mechanism 6 is activated. If the deviation value is significantly reduced after backflushing, it indicates that the backflushing mechanism 6 has effectively removed the residual sediment at the bottom. If the deviation value does not change significantly, the central control unit can issue a prompt to remind the operator to check whether the backflushing mechanism 6 is faulty (such as the second filter screen 63 being clogged, the water storage box 61 being leaked, etc.).

[0056] Based on the above embodiments, during use, when the water collection tank 31 is descending, the pull rod 66 moves down with the water collection tank 31. The end of the pull rod 66 contacts the elastic member 65 between the two rotating plates 64 and applies a downward pulling force, causing the two rotating plates 64 to close together under the pulling force of the elastic member 65. After the rotating plates 64 close, the sieved water falling from above cannot enter the water collection tank 31, but enters the water storage box 61 under the guidance of the rotating plates 64. The second filter screen 63 filters the sewage entering the water storage box 61, keeping the water inside the water storage box 61 relatively clear, and preventing the first filter screen 32 from being blocked during subsequent backwashing. When the control component 69 is not activated, the moving plate 68 blocks the drain tank 62, preventing the liquid inside the water storage box 61 from being sprayed out through the drain tank 62.

[0057] Furthermore, since the second filter screen 63 is set at an angle, the silt filtered by the second filter screen 63 will not accumulate on the second filter screen 63 under the continuous flushing of the screening water, thus avoiding the problem of clogging the second filter screen 63.

[0058] In addition, the start time of the control component 69 is the same as that of the delay mechanism 4. When the water collection tank 31 finishes draining and resets upward, the pull rod 66 moves upward with the water collection tank 31, the tension on the elastic component 65 disappears, and the two rotating plates 64 open up to each other under the reset elastic force of the third elastic component. The control component 69 drives the second piston rod 692 to extend through the second liquid supply device, pushing the moving plate 68 to slide in the transverse groove 67, so that the drain tank 62 is connected to the first filter screen 32. The water stored in the water storage box 61 is flushed out at high speed through the drain tank 62, passes through the first filter screen 32 and sprays into the water collection tank 31, performing a reverse flush on the first filter screen 32, washing off the mud and sand attached to the surface of the first filter screen 32. At the same time, the water flow impacts the bottom of the water collection tank 31, flushing away any mud and sand that may remain after the bottom plate 36 is flipped, and discharging it with the water flow. When the water collection tank 31 is reset, the above-mentioned backflushing process is completed, the water storage box 61 is emptied, and it is ready to store water for the next working cycle.

[0059] In summary, by adding a backwash mechanism 6, the present invention utilizes the linkage during the descent and resetting process of the water collection tank 31 to achieve reverse flushing of the first filter screen 32 and auxiliary rinsing of the bottom of the water collection tank 31. By utilizing the system's own gravitational potential energy and water flow energy, without the need for an additional power source, it can effectively prevent the first filter screen 32 from clogging and the bottom of the water collection tank 31 from becoming compacted with silt. This further improves the long-term operational stability of the monitoring component 3 and the accuracy of the detection results, while reducing the frequency of manual cleaning. Example 3

[0060] Considering that in some extreme scenarios, the amount of silt in the sieved water is relatively large, and the probability of clogging of the second filter screen 63 will also increase accordingly, in order to avoid the problem of workers having to clean the second filter screen 63 regularly, this embodiment provides scraper assemblies (not shown in the figure) on the two second filter screens 63 respectively. The scraper assembly includes a scraper that contacts the second filter screen 63, and a drive unit is provided on one side of the scraper. The drive unit can drive the scraper to reciprocate and clean the second filter screen 63.

[0061] The drive unit is electrically connected to the central control unit and is triggered by the central control unit according to a preset time interval or according to an abnormal signal detected by the position sensor.

[0062] In actual operation, the central control unit can be set to automatically start the drive unit at certain intervals of drainage cycles (e.g., every 50 drainage cycles), driving the scraper to move back and forth along the surface of the second filter screen 63 once, scraping away the mud and sand attached to the second filter screen 63 to one side. In addition, the central control unit can also make intelligent judgments based on the changing trend of the reset deviation value detected by the position sensor: if the deviation value shows an abnormally increasing trend in several consecutive drainage cycles, and the backflushing mechanism 6 has been operating normally, the central control unit can determine that the second filter screen 63 may be clogged. At this time, the drive unit is automatically started to drive the scraper to clean the second filter screen 63. After cleaning, if the deviation value returns to normal, the system continues to operate; if the deviation value still does not improve, the central control unit issues an alarm, prompting the operator to check whether the scraper assembly or the second filter screen 63 is damaged.

[0063] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A wastewater reuse treatment device for high-strength aggregate production, comprising a dewatering screen and at least one hydrocyclone, wherein the hydrocyclone is located above and fixedly connected to the dewatering screen, characterized in that, The dewatering screen includes a screen located below the hydrocyclone, and a monitoring component corresponding to the hydrocyclone is disposed below the screen. The monitoring component includes: A water collection tank, which can be moved up and down below the screen, is used to collect the water that has passed through the screen after being discharged from the cyclone separator and separated by the screen. The first filter screen is located on the lower side wall of the water collection tank to filter out mud and sand in the water. Two baffles are provided and are located on the outer side wall of the water collection tank. In the initial state of the water collection tank, the baffles can block the first filter screen. The support members are provided in two and are located at both ends of the water collection tank to support the movement of the water collection tank under changes in gravity. The two support members are respectively provided with triggering mechanisms inside. A position sensor is disposed on one side of the water collection tank to detect the vertical position of the water collection tank.

2. The wastewater reuse treatment device for high-strength aggregate production according to claim 1, characterized in that, The dewatering screen also includes a water tank located below the screen. The support includes a fixed cylinder fixedly connected to the water tank. A connecting rod is slidably connected inside the fixed cylinder. One end of the connecting rod passes through the fixed cylinder and is fixedly connected to the water collection tank. A first elastic element is provided between the inner wall of the fixed cylinder and the connecting rod.

3. The wastewater reuse treatment device for high-strength aggregate production according to claim 2, characterized in that, The triggering mechanism includes a mounting block disposed on the circumferential side of the fixed cylinder. The mounting block has a cavity communicating with the fixed cylinder. A wedge block is slidably connected in the cavity. The wedge block has symmetrical upper and lower inclined sides. A second elastic element is disposed between the wedge block and the cavity.

4. The wastewater reuse treatment device for high-strength aggregate production according to claim 1, characterized in that, The bottom of the water collection tank is provided with a flip-up bottom plate, which opens after a delay after the water collection tank is reset, to discharge the mud and sand deposited at the bottom of the water collection tank.

5. The wastewater reuse treatment device for high-strength aggregate production according to claim 4, characterized in that, It also includes a delay mechanism, which is disposed on the side wall of the water collection tank and is used to trigger the bottom plate to flip after a preset time following the reset of the water collection tank; The delay mechanism includes a first hydraulic cylinder fixedly connected to a water collection tank. A first piston rod is slidably connected inside the first hydraulic cylinder. A crossbar is fixedly connected to one end of the first piston rod that passes through the first hydraulic cylinder. The crossbar is located on the side near the bottom plate's flipping fulcrum and contacts the bottom plate. A first liquid supply device is externally connected to the first hydraulic cylinder through a pipe.

6. The wastewater reuse treatment device for high-strength aggregate production according to claim 1, characterized in that, The water collection tank is equipped with a flow-slowing mechanism inside. The flow-slowing mechanism is used to guide the screened water entering the water collection tank to the side wall of the water collection tank, so as to prevent the water flow from directly impacting the bottom of the water collection tank. The flow control mechanism includes two symmetrically arranged lower inclined plates that are fixedly connected to the side wall of the water collection tank, and a guide plate located in the middle of the water collection tank is provided below the two lower inclined plates.

7. The wastewater reuse treatment device for high-strength aggregate production according to claim 2, characterized in that, Each of the two baffles is provided with a backflushing mechanism. The backflushing mechanism includes a water storage box fixedly connected to the baffle. A drain groove corresponding to the first filter screen is opened on one side of the water storage box. The top of the water storage box is inclined and a second filter screen is fixedly connected to it. A rotating plate is rotatably connected to the top of the baffle. An elastic member is provided between the two rotating plates. A pull rod matching the elastic member is fixedly connected to the water collection groove. When the water collection groove moves down, the two rotating plates can close under the action of the elastic member. A third elastic member is provided between the two rotating plates and the baffle.

8. A wastewater reuse treatment device for high-strength aggregate production according to claim 7, characterized in that, The bottom of the two water storage boxes is provided with a horizontal groove, and a movable plate matching the drain tank is slidably connected in the horizontal groove. A control component is provided on one side of each of the two water storage boxes. The control component can control the movable plate to slide in the horizontal groove, so that the drain tank is opened or closed. The control component includes a second hydraulic cylinder fixedly connected to a water storage box. A second piston rod is slidably connected inside the second hydraulic cylinder. One end of the second piston rod passes through the second hydraulic cylinder and is fixedly connected to a moving plate. A second liquid supply device is externally connected to the second hydraulic cylinder through a pipe.

9. A wastewater reuse treatment device for high-strength aggregate production according to claim 3, characterized in that, It also includes a counter, which is connected to the wedge block or the water collection tank, and is used to record the number of times the water collection tank drains per unit time; The position sensor is a non-contact displacement sensor used to continuously detect the deviation between the position of the water collection tank after reset and the initial position.

10. A wastewater reuse treatment device for high-strength aggregate production according to claim 9, characterized in that, It also includes a central control unit, which is electrically connected to the position sensor and the counter respectively, and is used to determine the working status of the hydrocyclone based on the deviation value detected by the position sensor and the number of drainages recorded by the counter; Specifically, when the number of drainage cycles increases and the deviation value decreases, the hydrocyclone is determined to be in a coarse flow state; when the number of drainage cycles decreases and the deviation value increases, the hydrocyclone is determined to be in a fine flow state.

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