A multi-sensor fusion sand particle size grading system and dynamic regulation method

Abstract

The application provides a multi-sensor fusion sand particle size grading system and a dynamic regulation method. The grading system comprises a feeder, a coarse sand sieve plate, a coarse sand conveying mechanism, a fine sand conveying mechanism and a regulation assembly. The multi-sensor fusion sand particle size grading system can maintain the maximum feeding speed, thereby ensuring the maximum grading efficiency and the grading effect.

Description

Technical Field

[0001] This invention belongs to the field of sand and gravel production technology, specifically relating to a multi-sensor fusion sand and gravel particle size classification system and dynamic control method. Background Technology

[0002] The construction industry requires a large amount of sand and gravel, and the particle size of sand and gravel aggregates affects concrete strength, workability, and durability. Based on particle size, sand and gravel aggregates are divided into coarse aggregates and fine aggregates. During production, grading is necessary according to the particle size of the sand and gravel. However, in existing technologies, the grading efficiency is not ideal, and it is impossible to adjust the grading efficiency based on the sand and gravel flow rate. Summary of the Invention

[0003] The present invention aims to at least solve one of the aforementioned technical problems existing in the prior art. To this end, in a first aspect, the present invention provides a multi-sensor fusion sand and gravel particle size classification system capable of maintaining screening efficiency.

[0004] Secondly, the present invention provides a dynamic control method for a sand and gravel particle size classification system that applies the above-mentioned multi-sensor fusion.

[0005] According to a first aspect of the present invention, a multi-sensor fusion sand and gravel particle size classification system includes: The feeder is equipped with a sand and gravel storage bin and a first conveying component located at the bottom of the sand and gravel storage bin; A coarse sand screen plate is inclined relative to the horizontal direction. The side wall of the coarse sand screen plate is provided with a discharge port. An adjusting plate is provided on the upper end face of the coarse sand screen plate. Multiple discharge ports are provided along the conveying direction of the coarse sand screen plate. The adjusting plate corresponds to each discharge port and is used to cut off the coarse sand screen plate so that sand and gravel are discharged from the corresponding discharge port. A coarse sand conveying mechanism is connected to the discharge port and is used to convey the screened coarse sand. A fine sand conveying mechanism is disposed below the coarse sand screen plate and is used to receive the screened fine sand; The control component includes a first sensor disposed on the sand and gravel storage bin, a second sensor disposed above the coarse sand screen plate, and a third sensor disposed on the discharge port. The first sensor is used to detect the amount of sand and gravel stored, the second sensor is used to detect the amount of sand and gravel on the coarse sand screen plate, and the third sensor is used to detect the amount of sand and gravel discharged from the discharge port.

[0006] The multi-sensor fusion sand and gravel particle size classification system according to embodiments of the present invention has at least the following beneficial effects: The multi-sensor fusion sand and gravel particle size classification system in this embodiment can maintain the maximum feeding speed by setting multiple sensors, thereby ensuring the maximum classification efficiency and the classification effect.

[0007] According to some embodiments of the present invention, along the conveying direction of the coarse sand screen plate, the end of the adjusting plate away from the discharge port is higher than the end of the adjusting plate near the discharge port.

[0008] According to some embodiments of the present invention, the coarse sand screen plate is provided with an elastic support portion, and when the adjusting plate is flipped downward to be close to the coarse sand screen plate, the adjusting plate abuts against the elastic support portion.

[0009] According to some embodiments of the present invention, the lower end of the adjusting plate is rotatably connected to the coarse sand screen plate, and the upper end of the adjusting plate can rotate backward along the conveying direction of the coarse sand screen plate to abut against the elastic support portion.

[0010] According to some embodiments of the present invention, the coarse sand screen plate is provided with a relief groove, and the adjusting plate can be flipped into the relief groove.

[0011] According to some embodiments of the present invention, the elastic support is configured as a spring structure, the two ends of the adjusting plate extend to both sides of the coarse sand screen plate, and the elastic support abuts against the two ends of the adjusting plate.

[0012] According to some embodiments of the present invention, the adjusting plate is connected to a flipping drive mechanism, the discharge port is provided with a cover plate, and the cover plate is connected to an opening and closing drive mechanism.

[0013] According to some embodiments of the present invention, along the conveying direction of the coarse sand screen plate, the adjusting plate includes a lowermost tail plate and an intermediate plate located in front of the tail plate, the intermediate plate being provided with a screen hole structure of the same size as the coarse sand screen plate.

[0014] According to a second aspect of the present invention, the method for dynamic control of sand and gravel particle size, employing the aforementioned multi-sensor fusion sand and gravel particle size classification system, includes: First, the amount of sand and gravel stored in the sand and gravel storage bin is obtained. When the amount of sand and gravel stored is greater than the set amount, the first conveying component is controlled to output sand and gravel at a first speed. When the amount of sand and gravel stored is less than the set amount, the first conveying component is controlled to output sand and gravel at a second speed less than the first speed. Then, the amount of sand and gravel on the coarse sand screen plate is detected. When the sand and gravel are spread to a thickness lower than the set thickness, they are discharged from the nearest discharge port. During the discharge process, it is detected whether the sand and gravel contain fine sand. If fine sand is contained, the current discharge port is closed and the next discharge port is opened. If the current discharge port is the last discharge port, the output speed of the first conveying component is reduced.

[0015] The method for dynamic control of sand and gravel particle size according to embodiments of the present invention has at least the following beneficial effects: The dynamic control method for sand and gravel particle size in this embodiment can maximize the feeding speed based on the length setting of the coarse sand screen plate, and timely discharge of coarse sand through the discharge port can ensure the discharge speed. Furthermore, the processing can be controlled according to the actual required sand and gravel flow rate, taking into account both the discharge speed and the screening effect.

[0016] According to some embodiments of the present invention, when it is detected that the sand and gravel on the coarse sand screen plate are below a set thickness, the output speed of the first conveying component is increased.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and some of these additional aspects and advantages will become apparent from the description or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Fig. 1 This is a schematic diagram of the overall top view structure of the present invention; Fig. 2 This is a front view of the coarse sand sieve plate in this invention; Fig. 3 This is a schematic diagram of one installation of the adjustment plate in this invention. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 limiting this invention.

[0021] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0023] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] Reference Figs. 1 to 3 The present invention proposes a multi-sensor fusion sand and gravel particle size classification system, comprising: The feeder is equipped with a sand and gravel storage bin 200 and a first conveying component 201 located at the bottom of the sand and gravel storage bin 200; A coarse sand screen plate 100 is inclined relative to the horizontal direction. The side wall of the coarse sand screen plate 100 is provided with a discharge port. An adjusting plate 101 is provided on the upper end face of the coarse sand screen plate 100. Multiple discharge ports are provided along the conveying direction of the coarse sand screen plate 100. The adjusting plate 101 corresponds to the discharge port one by one and is used to cut off the coarse sand screen plate 100 so that the sand and gravel are discharged from the corresponding discharge port. The coarse sand conveying mechanism 102 is connected to the discharge port and is used to convey the screened coarse sand. Fine sand conveying mechanism, which is located below coarse sand screen plate 100, is used to receive the screened fine sand; The control component includes a first sensor installed in the sand and gravel storage bin 200, a second sensor installed above the coarse sand screen plate 100, and a third sensor installed at the discharge port. The first sensor is used to detect the amount of sand and gravel stored, the second sensor is used to detect the amount of sand and gravel on the coarse sand screen plate 100, and the third sensor is used to detect the amount of sand and gravel discharged from the discharge port.

[0025] During operation, sand and gravel raw materials are fed into the sand and gravel storage silo 200 and conveyed by the first conveying component 201 at the bottom of the silo. The conveying speed of the first conveying component 201 determines the discharge speed. The sand and gravel conveyed by the first conveying component 201 fall directly onto the coarse sand screen plate 100, which screens the sand and gravel. Fine sand is discharged from below the coarse sand screen plate 100 onto the fine sand conveying mechanism for output. The coarse sand remains on the coarse sand screen plate 100 and is conveyed downwards along the inclined direction until it is discharged from the discharge port onto the coarse sand conveying mechanism 102.

[0026] Since the coarse sand screen plate 100 has multiple discharge ports along the inclined direction, the distance of the coarse sand screen plate 100 used for screening is different from the discharge port. The lower the screen plate, the larger the screening area. Thus, when sand and gravel are fed onto the coarse sand screen plate 100 and are screened by the coarse sand screen plate 100 and move to the first discharge port, if the coarse sand discharged from the first discharge port contains fine sand, it means that the screening is incomplete. The discharge port is then closed and the next discharge port is activated. This process can make the screening area match the output of the first conveying component 201.

[0027] By using multiple sensors, the implementation of the above mechanism and the normal operation of the system can be effectively ensured.

[0028] In summary, the multi-sensor fusion sand and gravel particle size classification system of this embodiment, by setting multiple sensors, can maintain the maximum feeding speed, thereby ensuring the maximum classification efficiency and the classification effect.

[0029] In some embodiments of the present invention, along the conveying direction of the coarse sand screen plate 100, the end of the adjusting plate 101 furthest from the discharge port is higher than the end closest to the discharge port. This way, when the sand and gravel are transported to the position of the adjusting plate 101, the inclined arrangement of the adjusting plate 101 can guide the sand and gravel to the discharge port for rapid discharge.

[0030] In some embodiments of the present invention, the coarse sand screen plate 100 is provided with an elastic support portion 103, and when the adjusting plate 101 is flipped downward to be close to the coarse sand screen plate 100, the adjusting plate 101 abuts against the elastic support portion 103.

[0031] It is understandable that when sand and gravel need to be discharged from the rear discharge port, they need to pass over the front adjusting plate 101. In this embodiment, the adjusting plate 101 is supported by an elastic support part 103. When the sand and gravel pass over the adjusting plate 101, the change in gravity will cause the adjusting plate 101 to jump up and down, thereby producing a vibration and uniform dispersion effect on the sand and gravel, which is beneficial to promoting screening efficiency.

[0032] Reference Fig. 3In some embodiments of the present invention, the lower end of the adjusting plate 101 is rotatably connected to the coarse sand screen plate 100, and the upper end of the adjusting plate 101 can rotate rearward along the conveying direction of the coarse sand screen plate 100 to abut against the elastic support part 103. That is, the upper end of the adjusting plate 101 is flipped backward to close to the coarse sand screen plate 100 to open it, allowing sand and gravel to pass through, and flipped upward to cut off the sand and gravel. With the structural setting of this embodiment, cutting can be performed during the sand and gravel conveying process, and there is no problem of the adjusting plate 101 being stuck, causing the cutting mechanism to fail, thus ensuring high reliability.

[0033] In some embodiments of the present invention, the coarse sand screen plate 100 is provided with a relief groove, and the adjusting plate 101 can be flipped into the relief groove. Furthermore, along the conveying direction of the coarse sand screen plate 100, the width of the relief groove is smaller than the width of the adjusting plate 101, so that when the adjusting plate 101 is flipped into the relief groove, its rear end overlaps the coarse sand screen plate 100, thereby preventing coarse sand from getting stuck under the adjusting plate 101 and causing the adjusting plate 101 to be unable to move up and down.

[0034] In some embodiments of the present invention, the elastic support portion 103 is configured as a spring structure, and the two ends of the adjusting plate 101 extend to both sides of the coarse sand screen plate 100, with the elastic support portion 103 abutting against the two ends of the adjusting plate 101.

[0035] In this embodiment, the adjusting plate 101 is supported from the outside of the coarse sand screen plate 100, which facilitates the setting of the fine sand conveying mechanism below it and will not cause interference.

[0036] In some embodiments of the present invention, the adjusting plate 101 is connected to a flipping drive mechanism, which adopts a cylinder or hydraulic cylinder structure.

[0037] Specifically, there is no direct connection between the flipping drive mechanism and the adjusting plate 101. Since the coarse sand screen plate 100 is inclined, the adjusting plate 101 naturally flips backward under the action of gravity. The flipping drive mechanism only needs to be supported behind the adjusting plate 101 to ensure the stability of the adjusting plate 101 when cutting sand and gravel. After retracting, the adjusting plate 101 will naturally flip backward under the action of gravity and the thrust of sand and gravel to abut against the elastic support part 103.

[0038] The structural design of this embodiment takes into account the up-and-down jumping design of the adjustment plate 101, and will not hinder the up-and-down jumping of the adjustment plate 101 under the action of the elastic support part 103, and the structure is simple.

[0039] Furthermore, in some embodiments of the present invention, the discharge port is provided with a cover plate, and the cover plate is connected to an opening and closing drive mechanism. By controlling the opening and closing of the discharge port through the cover plate, sand and gravel can be effectively prevented from being discharged from non-selected discharge ports.

[0040] The cover plate preferably adopts an adjustable type with an upper flip-opening mechanism. When opened, its upper end rotates away from the coarse sand screen plate 100 and overlaps the coarse sand conveying mechanism 102, facilitating the conveying of sand and gravel to the coarse sand conveying mechanism 102. The opening and closing drive mechanism can be a motor structure or a telescopic cylinder structure, which is not specifically limited here.

[0041] In some embodiments of the present invention, along the conveying direction of the coarse sand screen plate 100, the adjusting plate 101 includes a lowermost tail plate and an intermediate plate located in front of the tail plate, the intermediate plate being provided with a screen hole structure of the same size as the coarse sand screen plate 100.

[0042] With the structural configuration of this embodiment, when the sand and gravel pass over the front adjusting plate 101, the adjusting plate 101 can also perform sand and gravel screening, thereby improving screening efficiency.

[0043] Embodiments of the present invention also propose a method for dynamic control of sand and gravel particle size, applied to the aforementioned multi-sensor fusion sand and gravel particle size classification system. This includes: First, obtain the sand and gravel storage capacity of the sand and gravel storage bin 200. When the sand and gravel storage capacity is greater than the set amount, control the first conveying component 201 to output sand and gravel at the first speed. When the sand and gravel storage capacity is less than the set amount, control the first conveying component 201 to output sand and gravel at the second speed, which is less than the first speed. Then, the amount of sand and gravel on the coarse sand screen plate 100 is detected. When the sand and gravel are spread to a thickness lower than the set thickness, they are discharged from the nearest discharge port. During the discharge process, it is detected whether the sand and gravel contain fine sand. If fine sand is contained, the current discharge port is closed and the next discharge port is opened. If the current discharge port is the last discharge port, the output speed of the first conveying component 201 is reduced.

[0044] Specifically, when the first sensor detects that the sand and gravel storage silo 200 is full, the first conveying component 201 conveys the sand and gravel at a set maximum speed. The sand and gravel gradually spread out on the coarse sand screen plate 100. When the second sensor detects that the thickness of the spread sand and gravel is lower than the set height (i.e., thickness), it is determined that the sand and gravel below this thickness has been completely screened and can be discharged. Then, it is discharged from the first discharge port along the conveying direction. During discharge, the third sensor detects whether fine sand is present. If fine sand is present, it indicates that the screening is not thorough. The current discharge port is then closed, and the corresponding regulating plate 101 is opened to start the next discharge port. This process is repeated until the discharged coarse sand does not contain any fine sand.

[0045] Furthermore, if the current discharge port is the last discharge port, the next discharge port cannot be activated, and the speed of the first conveying component 201 will be reduced.

[0046] When the total amount of sand and gravel in the sand and gravel storage bin 200 decreases to below a certain amount, the conveying speed of the first conveying component 201 is reduced to reduce power consumption. At the same time, the aforementioned judgment is continued on the coarse sand screen plate 100. Due to the reduced discharge speed, the amount of sand and gravel on the coarse sand screen plate 100 decreases. The second sensor detects that the thickness of the sand and gravel on the coarse sand screen plate 100 is below the set height. The sand and gravel is cut off from the corresponding adjustment plate 101 at that position and discharged from the corresponding discharge port. The discharge port and adjustment plate 101 behind the adjustment plate 101 are all deactivated. The third sensor detects whether the discharged coarse sand contains fine sand. If it does, the next level discharge port is activated.

[0047] The dynamic control method for sand and gravel particle size in this embodiment can maximize the feeding speed based on the length setting of the coarse sand screen plate 100, and timely discharge of coarse sand through the discharge port can ensure the discharge speed. Furthermore, the processing can be controlled according to the actual required sand and gravel flow rate, taking into account both the discharge speed and the screening effect.

[0048] In some embodiments of the present invention, when the first conveying component 201 conveys sand and gravel at a first speed, when the first sensor detects that the sand and gravel on the coarse sand screen plate 100 is below a set thickness, the output speed of the first conveying component 201 is increased, thereby ensuring that the coarse sand screen plate 100 maintains a high screening efficiency when the total amount of sand and gravel is sufficient.

[0049] It is understood that the first conveying component 201, the coarse sand conveying mechanism 102, and the fine sand conveying mechanism can all use conveyor belts or other known structures, without specific limitations here.

[0050] The type and number of the first, second, and third sensors can be designed as needed, including but not limited to distance sensors and vision sensors.

[0051] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A multi-sensor fusion sand and gravel particle size classification system, characterized in that, include: The feeder is equipped with a sand and gravel storage bin and a first conveying component located at the bottom of the sand and gravel storage bin; A coarse sand screen plate is inclined relative to the horizontal direction. The side wall of the coarse sand screen plate is provided with a discharge port. An adjusting plate is provided on the upper end face of the coarse sand screen plate. Multiple discharge ports are provided along the conveying direction of the coarse sand screen plate. The adjusting plate corresponds to each discharge port and is used to cut off the coarse sand screen plate so that sand and gravel are discharged from the corresponding discharge port. A coarse sand conveying mechanism is connected to the discharge port and is used to convey the screened coarse sand. A fine sand conveying mechanism is disposed below the coarse sand screen plate and is used to receive the screened fine sand; The control component includes a first sensor disposed on the sand and gravel storage bin, a second sensor disposed above the coarse sand screen plate, and a third sensor disposed on the discharge port. The first sensor is used to detect the amount of sand and gravel stored, the second sensor is used to detect the amount of sand and gravel on the coarse sand screen plate, and the third sensor is used to detect the amount of sand and gravel discharged from the discharge port.

2. The multi-sensor fusion sand and gravel particle size classification system according to claim 1, characterized in that, Along the conveying direction of the coarse sand screen plate, the end of the adjusting plate away from the discharge port is higher than the end closer to the discharge port.

3. The multi-sensor fusion sand and gravel particle size classification system according to claim 1, characterized in that, The coarse sand screen plate is provided with an elastic support part. When the adjusting plate is flipped down to be close to the coarse sand screen plate, the adjusting plate abuts against the elastic support part.

4. The multi-sensor fusion sand and gravel particle size classification system according to claim 3, characterized in that, The lower end of the adjusting plate is rotatably connected to the coarse sand screen plate, and the upper end of the adjusting plate can rotate backward along the conveying direction of the coarse sand screen plate to abut against the elastic support part.

5. The multi-sensor fusion sand and gravel particle size classification system according to claim 4, characterized in that, The coarse sand screen plate is provided with a clearance groove, and the adjusting plate can be flipped into the clearance groove.

6. The multi-sensor fusion sand and gravel particle size classification system according to claim 4, characterized in that, The elastic support is configured as a spring structure, and the two ends of the adjusting plate extend to both sides of the coarse sand screen plate, with the elastic support abutting against the two ends of the adjusting plate.

7. The multi-sensor fusion sand and gravel particle size classification system according to claim 1, characterized in that, The adjusting plate is connected to a flipping drive mechanism, and the discharge port is provided with a cover plate, which is connected to an opening and closing drive mechanism.

8. The multi-sensor fusion sand and gravel particle size classification system according to claim 1, characterized in that, Along the conveying direction of the coarse sand screen plate, the adjusting plate includes a lower tail plate and an intermediate plate located in front of the tail plate, the intermediate plate being provided with a screen hole structure of the same size as the coarse sand screen plate.

9. A method for dynamic control of sand and gravel particle size, characterized in that, The sand and gravel particle size classification system applied to any one of claims 1 to 8 includes: First, the amount of sand and gravel stored in the sand and gravel storage bin is obtained. When the amount of sand and gravel stored is greater than the set amount, the first conveying component is controlled to output sand and gravel at a first speed. When the amount of sand and gravel stored is less than the set amount, the first conveying component is controlled to output sand and gravel at a second speed less than the first speed. Then, the amount of sand and gravel on the coarse sand screen plate is detected. When the sand and gravel are spread to a thickness lower than the set thickness, they are discharged from the nearest discharge port. During the discharge process, it is detected whether the sand and gravel contain fine sand. If fine sand is contained, the current discharge port is closed and the next discharge port is opened. If the current discharge port is the last discharge port, the output speed of the first conveying component is reduced.

10. The method for dynamic control of sand and gravel particle size according to claim 9, characterized in that, When the sand and gravel on the coarse sand screen plate are detected to be below the set thickness, the output speed of the first conveying component is increased.

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