Rock-fill dam material gradation detection device based on drum screen

Abstract

The utility model discloses a rockfill dam material grading detection device based on a drum screen. The rockfill dam material grading detection device comprises a vertical feeding machine, a drum screen device, a coarse material channel, a three-dimensional laser scanner, a screen box displacement device, a fine material fine screening device, a weighing mechanism, a material recovery device, a power device, a data storage device and a result processing and visualization device. Dam materials are divided into fine materials and coarse materials through the drum screen device, the coarse materials roll into the weighing mechanism from the right channel to be accumulatively weighed, the fine materials enter the fine screening device from the lower portion, a plurality of screening boxes are used for grading screening, the grading effect is remarkably improved, after the coarse materials are weighed, the coarse materials are recycled, then the fine materials are weighed, and the screening efficiency is improved. The weight of each screen box with the materials after grading screening is subtracted from the weight of the screen box, the weight of the materials in each particle size interval is obtained, then the materials are recycled, the problem that due to the fact that small particles are wrapped by large particles in the dam materials, weighing is inaccurate is solved, and automatic dam material grading screening and weighing are achieved.

Description

Technical Field

[0001] The utility model relates to the field of rockfill dam material particle gradation detection, in particular to a rockfill dam material gradation detection device based on a drum screen. Background Art

[0002] According to the "Concrete Face Rockfill Dam Construction Specification" (DL / T 5128-2021), during the construction of rockfill dams, the rolling quality inspection of dam materials is a key link to ensure the stability of the dam structure and the quality of the project. Among them, particle grading, as one of the main inspection items, is of great significance for the screening, grading and quality assessment of dam materials.

[0003] The traditional method is to perform manual screening after the excavation of the test pit is completed. The dam material is divided into coarse material and fine material with a boundary of 50mm. Among them, the huge particle size particles as coarse material cannot be separated by traditional screening methods due to their large weight and volume. Therefore, it is necessary to manually pick and then manually weigh the mass and measure the particle size. This method is highly dependent on labor, has low efficiency, limits construction progress, and has high labor costs. At present, the above problems need to be solved urgently.

[0004] Chinese patent CN205138933U mentions a dam material gradation detection device, which is suitable for earth-rock dams and other dam materials with finer particles. Rockfill dams have huge particles and are not suitable for screening. At the same time, the device is prone to incomplete screening of large particles entrained by small particles. Chinese patent CN214391003U proposes a sand particle gradation detection device, which uses gravity and centrifugal action to screen concrete sand. It has good reference value, but it is still not suitable for huge particles. Therefore, it will lead to the problem of inaccurate weighing of dam materials after screening; in addition, for the existing technology of detecting the particle size of dam materials by visual recognition, there will be detection errors due to the fast falling speed and the presence of concealment during the falling process of the materials.

[0005] The utility model provides a rockfill dam material gradation detection device based on a drum screen to achieve an efficient detection effect. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a gradation detection device for rockfill dam materials based on a drum screen, which solves the problems of low efficiency, high labor cost, and inability of existing devices to be applied to huge particles in rockfill dam materials in traditional methods, thereby improving work efficiency, saving costs, and expanding the scope of application.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A gradation detection device for rockfill dam materials based on a drum screen, comprising a vertical feeder, a drum screen device, a coarse material channel, a three-dimensional laser scanner, a screen box displacement device, a fine material fine screening device, a weighing mechanism, a material recovery device, a power device, a data storage device, and a result processing and visualization device;

[0009] The vertical loader is used to transport the rock pile upwards. The drum screen device is located on one side of the vertical loader, receiving the rock pile transmitted by the vertical loader, and fully turning the rock pile into fine material and coarse material;

[0010] The coarse material channel is used to receive the coarse material screened by the drum screen device and transmit it to the weighing mechanism for weighing, and the weighing mechanism is also used to weigh the fine material;

[0011] The 3D laser scanner is installed on both sides of the coarse material channel. When the coarse material is rolling, it scans the coarse material and generates point cloud data for 3D model reconstruction. The data is transmitted to the data storage device and finally summarized and sent to the result processing and visualization device for data processing and visualization.

[0012] The fine material fine screening device receives the fine material screened by the drum screen device and screens the fine material in grades. The screen box displacement device is installed on one side of the fine material fine screening device to push the screened fine material down.

[0013] The weighing mechanism is used in combination with the material recovery device to recover the screened rockfill material after weighing it;

[0014] The power device is electrically connected to the vertical loader, the drum screen device, the three-dimensional laser scanner, the screen box displacement device, the fine material fine screening device, the weighing mechanism, the material recovery device, the power device, the data storage device and the result processing and visualization device to provide power thereto.

[0015] Preferably, the vertical loader includes a feed pipe, a discharge port, a drive roller, a transmission belt, a material box, a power supply access portion and a body;

[0016] The feed pipe and the discharge port are located at the lower left and upper right positions of the fuselage respectively, and both the feed pipe and the discharge port penetrate the side wall of the fuselage;

[0017] Two driving rollers with driving motors are arranged inside the machine body, and a transmission belt is connected between the outer sides of the two driving rollers. A plurality of evenly distributed material boxes are arranged on the transmission belt. The material box is lifted upward on the side close to the feeding pipe, and the opening of the lifted material box faces upward, and a gap is provided between the end of the material box and the machine body;

[0018] The driving motor at the end of the driving roller is electrically connected to the power device through a wire extending from the power supply access portion, so that the driving roller rotates in a clockwise direction.

[0019] Preferably, the drum screen device comprises a feed pipe, a drum screen, a limit ring, a motor, a coupling, a fine material outlet, a frame, a coarse material outlet and a first bracket;

[0020] The drum screen is tilted, a coupling is provided at the inner axis of the drum screen, and the coupling is connected to the drum screen through four mutually perpendicular first brackets, so that the drum screen and the coupling rotate synchronously;

[0021] The feed pipe and the coarse material outlet are located at the left and right openings of the drum screen respectively, and the top of the feed pipe is butted against the outlet, the output end of the feed pipe extends into the left opening of the drum screen, and the feed pipe does not contact the inner wall of the drum screen;

[0022] The feed pipe is fixed on the frame, the coupling is tilted, and both ends of the coupling are rotatably connected to the feed pipe and the frame respectively;

[0023] The motor is mounted on the frame, and the motor output shaft is connected to the coupling via a belt drive;

[0024] At least two limiting rings are arranged on the outer wall of the drum screen along the axial direction, and limiting rails matching the limiting rings are arranged on the frame;

[0025] The fine material outlet is located at the bottom of the drum screen and is used to transmit the fine material, and the fine material outlet is fixedly connected to the frame.

[0026] Preferably, the coarse material channel comprises an inlet end, an enclosing baffle, an outlet end, a channel slide, a second bracket and a flexible covering material;

[0027] The channel slide is arranged as a spiral descending structure for constraining the movement path of the coarse material, and the channel slide is mounted on the top of the second bracket;

[0028] A flexible covering material is provided on the channel slide to absorb the kinetic energy of the coarse material and reduce the rolling speed of the coarse material;

[0029] The inlet end and the outlet end are respectively located at the head and tail ends of the channel slide, and the inlet end is closely connected with the coarse material outlet, and the outlet end is connected with the right side of the weighing mechanism;

[0030] An enclosing baffle is arranged between the two sides of the top of the channel slide to form a blocking cover at the top of the inlet end.

[0031] Preferably, the screen box displacement device comprises a power traction device, a push rod, a limit guide rail, a slide block and a base;

[0032] The base acts as a supporting structure, fixed to the ground, and contains an electronic control system that controls the movement of the mechanical system;

[0033] A limit guide rail is provided inside the base, a slider is slidably connected to the limit guide rail, and a power traction device is provided at the end of the limit guide rail. The power traction device is used to provide power to the slider to enable the push rod to telescope.

[0034] Preferably, the fine material fine screening device includes a screen box, a strong magnetic attraction, a liftable limit plate, a hydraulic lifting device, a vibration table, a reinforced channel steel, a vibration motor, a bracket channel steel, a spring shock absorber and a fixed baffle;

[0035] The screen box is used to hold the fine material falling from the drum screen. Its cross-sectional shape is set to be circular, and strong magnetic attraction is arranged at the upper and lower edges of the screen box;

[0036] The vibrating table is located below the screen box, and the vibration of the vibrating table is controlled to help screen the fine material;

[0037] The lifting limit plate is arranged in a ring shape on the outer edge of the vibration table;

[0038] The hydraulic lifting device is located at the lower side of the liftable limit plate, and the liftable limit plate is controlled by the hydraulic system;

[0039] The reinforcing channel steel is located at the bottom of the vibration table and is used to strengthen the structural strength of the vibration table;

[0040] The vibration motor is installed on one side of the reinforced channel steel as the power source for driving the vibration table;

[0041] A bracket channel steel is provided at the bottom of the reinforced channel steel, and a spring shock absorber is installed between the vibration table and the bracket channel steel;

[0042] The fixed baffle is fixed on the frame, and the fixed baffle is located on the right side of the screen box.

[0043] Preferably, the number of the sieve boxes is set to be multiple, and the multiple sieve boxes are stacked on the vibration table in sequence from bottom to top;

[0044] The sieve holes on the surface of the multiple sieve boxes have increasing diameters from bottom to top, and are used for grading and screening fine materials;

[0045] Before the fine material screening device starts screening, the liftable limit plate rises to limit the bottom layer of screen boxes, and the remaining screen boxes are also fixed together by strong magnetic attraction. The entire screen box stack is fully vibrated as a whole on the vibration table, and the material is fully and evenly screened; when the screening is completed, the liftable limit plate is lowered to allow the screen box to be pushed to the top of the weighing mechanism by the push rod of the screen box displacement device for weighing. By subtracting the known weight of the screen box, the weight of the material in each particle size range in the screen box can be obtained.

[0046] Preferably, the distance from the lower end of the fixed baffle to the vibration table is L, and the thickness of the screen box is h , then it satisfies h<L<2h ;

[0047] When the push rod of the screen box displacement device pushes the screen box, the fixed baffle limits the horizontal displacement of the bottom layer of screen boxes and only allows the bottom layer of screen boxes to pass. The shear force is sufficient to overcome the strong magnetic force to cause the screen box to displace.

[0048] Preferably, the weighing mechanism comprises a platform scale and a weighing platform, and the weighing platform is located on one side of the platform scale;

[0049] The platform scale is used for independent weighing of fine materials and coarse materials. The left side of the weighing platform is adjacent to the vibrating table, and the plane of the weighing platform and the plane of the vibrating table are on the same horizontal plane;

[0050] The weighing platform is used to place the sieve boxes pushed by the push rod and weigh the weight of the materials in the same particle size range in each sieve box;

[0051] A flap is movably provided at one end of the weighing platform near the outlet end, and a driving motor is provided at the end of the flap. The output end of the driving motor drives the flap to twist. Before the coarse material is screened, the flap is erected to stop the coarse material rolling out of the coarse material channel; after the coarse material is weighed and recovered, the flap is lowered to allow the screen box to pass.

[0052] Preferably, the material recovery device comprises an annular gripper, a rotary joint, a connecting arm, a restrictive slide rail and a third bracket;

[0053] The third bracket is arranged on the outside of the platform scale, the restrictive slide rail is arranged on the inner top of the third bracket and is located directly above the platform scale, a connecting arm is movably arranged in the restrictive slide rail, an electric push rod is arranged at the end of the restrictive slide rail, and the output end of the electric push rod drives the connecting arm to make the connecting arm move on the path of the restrictive slide rail;

[0054] The annular gripper fits the shape of the screen box and is used to clamp the screen box so that the screen box can be lifted and moved;

[0055] Both sides of the bottom of the connecting arm are rotatably connected with a rotating joint, and the other end of the rotating joint is connected to the annular gripper, so that the screen box can be turned over by rotating the rotating joint after being lifted, and is used for dumping and recovering fine materials;

[0056] The top of the connecting arm is arranged as a telescopic structure for adjusting the distance between the annular grippers on both sides.

[0057] The utility model has the following beneficial effects:

[0058] 1. The dam material is fed into the drum screen device through automatic feeding to be fully turned over, and the dam material is divided into fine material and coarse material. The coarse material rolls into the weighing mechanism from the right channel for cumulative weighing, and the fine material enters the fine screening device from the bottom. Multiple screen boxes are used for graded screening, and the grading effect is significantly improved. After the coarse material is weighed, the coarse material is recovered, and then the fine material is weighed. The weight of each screen box with material after graded screening is subtracted from the weight of the screen box itself to obtain the weight of the material in each particle size range, and then the material is recovered, solving the problem of inaccurate weighing caused by large particles entraining small particles in the dam material, realizing automated grading screening and weighing of dam materials, and solving the problems of low efficiency and high labor cost of traditional methods; the introduction of this device can effectively improve the screening and grading efficiency of dam materials during the construction of rockfill dams, thereby accelerating the construction progress and ensuring the construction quality; reducing labor costs and improving efficiency;

[0059] 2. By setting up a channel slide with a spiral descending structure, the movement path of the coarse material is constrained, and the flexible covering material is used to absorb the kinetic energy of the coarse material. The rolling speed of the coarse material is reduced during the rolling process, the scanning time of the 3D laser scanner is increased, and the reconstruction accuracy of the 3D model is improved. During the rolling of the coarse material, the 3D laser scanner scans, obtains point cloud data, calculates the particle size and volume, and transmits the data to the storage device. Finally, the data is summarized and sent to the processor for processing and visualization, thereby improving the intelligence of the device. This detection device based on the drum screen not only has application prospects in rockfill dam construction, but can also be expanded to other fields, such as road construction, foundation engineering, etc., and has broad market potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0061] Figure 2 It is a structural schematic diagram of the vertical feeder in the utility model;

[0062] Figure 3 This is a front view of the drum screen device in the utility model;

[0063] Figure 4 It is a right side view of the drum screen device in the utility model;

[0064] Figure 5 This is a schematic diagram of the structure of the coarse material channel in the utility model;

[0065] Figure 6 It is a structural schematic diagram of the screen box displacement device in the utility model;

[0066] Figure 7 It is a structural schematic diagram of the fine screening device in the utility model;

[0067] Figure 8 It is a structural schematic diagram of the material recovery device in the utility model.

[0068] Among them are:

[0069] Vertical feeder-1; drum screen device-2; coarse material channel-3; three-dimensional laser scanner-4; screen box displacement device-5; fine material fine screening device-6; weighing mechanism-7; material recovery device-8; power device-9; data storage device-10; result processing and visualization device-11;

[0070] Feeding pipe-101; discharging port-102; driving roller-103; transmission belt-104; material box-105; power supply access part-106; machine body-107;

[0071] Feeding pipe-201; drum screen-202; limiting ring-203; motor-204; coupling-205; fine material outlet-206; frame-207; coarse material outlet-208; first bracket-209;

[0072] Inlet end-301; surrounding baffle-302; outlet end-303; channel slide-304; second bracket-305; flexible covering material-306;

[0073] Power traction device-501; push rod-502; limit guide rail-503; slider-504; base-505;

[0074] Screen box-601; strong magnetic attraction-602; liftable limit plate-603; hydraulic lifting device-604; vibration table-605; reinforced channel steel-606; vibration motor-607; bracket channel steel-608; spring shock absorber-609; fixed baffle-610;

[0075] Platform scale-701; weighing platform-702; flap-703;

[0076] Annular gripper-801; rotating joint-802; connecting arm-803; restrictive slide rail-804; third bracket-805. DETAILED DESCRIPTION

[0077] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0078] In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not indicate the importance of the components, and therefore cannot be understood as a limitation on the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, and do not limit the scope of protection of the present invention.

[0079] like Figure 1 As shown, a gradation detection device for rockfill dam materials based on a drum screen comprises a vertical feeder 1, a drum screen device 2, a coarse material channel 3, a three-dimensional laser scanner 4, a screen box displacement device 5, a fine material fine screening device 6, a weighing mechanism 7, a material recovery device 8, a power device 9, a data storage device 10 and a result processing and visualization device 11;

[0080] The vertical feeder 1 is used to transport the rockfill upwards. The drum screen device 2 is located on one side of the vertical feeder 1, receives the rockfill transmitted by the vertical feeder 1, and fully turns the rockfill into fine material and coarse material. The fine material is the rockfill with a particle size less than 50 mm, and the coarse material is the rockfill with a particle size greater than 50 mm.

[0081] The coarse material channel 3 is used to receive the coarse material screened by the drum screen device 2 and transmit it to the weighing mechanism 7 for weighing, and the weighing mechanism 7 is also used to weigh the fine material;

[0082] The three-dimensional laser scanner 4 is installed on both sides of the coarse material channel 3. When the coarse material is rolling, the coarse material is scanned and point cloud data is generated for three-dimensional model reconstruction. The data is transmitted to the data storage device 10 and finally summarized and sent to the result processing and visualization device 11 for data processing and visualization.

[0083] The fine material fine screening device 6 receives the fine material screened by the drum screen device 2 and classifies and screens the fine material. The screen box displacement device 5 is installed on one side of the fine material fine screening device 6 to push the screened fine material down.

[0084] The weighing mechanism 7 is used in combination with the material recovery device 8 to recover the screened rockfill material after weighing it;

[0085] The power device 9 is electrically connected to the vertical loader 1, the drum screen device 2, the three-dimensional laser scanner 4, the screen box displacement device 5, the fine material fine screening device 6, the weighing mechanism 7, the material recovery device 8, the power device 9, the data storage device 10 and the result processing and visualization device 11 to provide power thereto.

[0086] As a preferred embodiment of the vertical feeder 1:

[0087] like Figure 1 and 2 As shown, the vertical loading machine 1 includes a feeding pipe 101, a discharging port 102, a driving roller 103, a material box 105, a power supply access portion 106 and a body 107;

[0088] The feed pipe 101 and the discharge port 102 are respectively located at the lower left and upper right positions of the fuselage 107. The feed pipe 101 and the discharge port 102 both penetrate the side wall of the fuselage 107. The feed pipe 101 is located at a low height, which is convenient for loading, reduces the difficulty of loading, and reduces manual labor;

[0089] Two driving rollers 103 with driving motors are arranged inside the body 107, and a transmission belt 104 is commonly connected between the outer sides of the two driving rollers 103. A plurality of evenly distributed material boxes 105 are arranged on the transmission belt 104. The plurality of material boxes 105 are moderately spaced apart. The material box 105 is lifted upward on the side close to the feed pipe 101, and the opening of the lifted material box 105 faces upward. A gap is provided between the end of the material box 105 and the body 107, and the gap is preferably 1 mm.

[0090] The driving motor at the end of the driving roller 103 is electrically connected to the power device 9 through a wire extending from the power access part 106, so that the driving roller 103 rotates clockwise. The speed is set so that the dam material can smoothly enter from the feed pipe 101, fall into the material box 105, and finally leave from the discharge port 102.

[0091] As a preferred embodiment of the drum screen device 2:

[0092] like Figure 3-4 As shown, the drum screen device 2 includes a feed pipe 201, a drum screen 202, a limit ring 203, a motor 204, a coupling 205, a fine material outlet 206, a frame 207, a coarse material outlet 208 and a first bracket 209;

[0093] The drum screen 202 is tilted, and the speed at which the rockfill moves in the drum screen 202 cannot be too fast, otherwise the screening will be insufficient and incomplete. Therefore, the drum screen 202 generally has a relatively strict installation tilt angle, which is preferably 5°. In actual situations, it can be adjusted as needed, or a lifting mechanism can be set at the bottom of the frame 207 to adjust the height of both sides, so as to achieve the adjustability of the tilt angle of the drum screen 202.

[0094] A coupling 205 is provided at the inner axis of the drum screen 202, and the coupling 205 is connected to the drum screen 202 through four mutually perpendicular first brackets 209, so that the drum screen 202 and the coupling 205 rotate synchronously;

[0095] The feed pipe 201 and the coarse material outlet 208 are respectively located at the left and right openings of the drum screen 202, and the top of the feed pipe 201 is connected to the outlet 102, and the output end of the feed pipe 201 extends into the left opening of the drum screen 202, and the feed pipe 201 does not contact the inner wall of the drum screen 202;

[0096] The feed pipe 201 is fixed on the frame 207, the coupling 205 is tilted, and the two ends of the coupling 205 are rotatably connected to the feed pipe 201 and the frame 207 respectively;

[0097] The motor 204 is mounted on the frame 207, and the output shaft of the motor 204 is connected to the coupling 205 through a belt drive;

[0098] At least two limiting rings 203 are provided on the outer wall of the drum screen 202 along the axial direction, and limiting rails matching the limiting rings 203 are provided on the frame 207 to ensure the stability of the structure;

[0099] The fine material outlet 206 is located at the bottom of the drum screen 202, and is used to transmit the fine material, prevent the fine material from being thrown out from the side, and make it fall into the fine material fine screening device 6 along a predetermined trajectory, and the fine material outlet 206 is fixedly connected to the frame 207;

[0100] When the rockfill material enters the drum screen 202 from the feed pipe 201, the rockfill material on the screen surface is fully turned and rolled due to the tilting and rotation of the drum screen 202, and the coarse material enters the coarse material channel 3 through the coarse material outlet 208, and the fine material enters the fine material fine screening device 6 through the fine material outlet 206;

[0101] The drum screen device 2 disclosed in this embodiment has the following advantages: due to the flipping and rolling of the material in the drum, the material stuck in the screen hole can be ejected to prevent the screen hole from being blocked; it runs smoothly, has low noise, and does not require a special infrastructure; it has a simple structure and is easy to maintain; it has a high degree of integrity and is convenient for storage at the construction site or transfer and transportation; it has high screening efficiency, large screening capacity, and long service life.

[0102] As a preferred embodiment of the coarse material channel 3:

[0103] like Figure 1 and 5 As shown, the coarse material channel 3 includes an inlet end 301, a surrounding baffle 302, an outlet end 303, a channel slide 304, a second bracket 305 and a flexible covering material 306;

[0104] The channel slide 304 is configured as a spiral descending structure for restricting the movement path of the coarse material, and the channel slide 304 is mounted on the top of the second bracket 305;

[0105] A flexible covering material 306 is provided on the channel slide 304 to absorb the kinetic energy of the coarse material and reduce the rolling speed of the coarse material, thereby increasing the scanning time of the 3D laser scanner and improving the reconstruction accuracy of the 3D model;

[0106] The inlet end 301 and the outlet end 303 are respectively located at the head and tail ends of the channel slide 304, and the inlet end 301 is tightly connected to the coarse material outlet 208, and the outlet end 303 is connected to the right side of the weighing mechanism 7;

[0107] An enclosing baffle 302 is provided between the two sides of the top of the channel slide 304 to form a blocking cover at the top of the inlet end 301 .

[0108] As a preferred embodiment of the screen box displacement device 5:

[0109] like Figure 1 and 6 As shown, the screen box displacement device 5 includes a power traction device 501, a push rod 502, a limit guide rail 503, a slider 504 and a base 505;

[0110] The base 505 is fixed on the ground as a supporting structure and contains an electronic control system for controlling the movement of the mechanical system;

[0111] A limit guide rail 503 is provided inside the base 505, a slider 504 is slidably connected to the limit guide rail 503, and a power traction device 501 is provided at the end of the limit guide rail 503. The power traction device 501 is used to provide power to the slider 504 to make the push rod 502 telescopically move. The power can come from various driving rollers, such as a motor, a pneumatic device or a hydraulic device.

[0112] The limiting guide rail 503 provides a stable moving path so that the slider 504 can move along the track. The slider 504 plays the role of positioning and bearing the load. They move along the track on the limiting guide rail and receive power from the power traction device 501.

[0113] As a preferred embodiment of the fine material fine screening device 6:

[0114] like Figure 1 and 7 As shown, the fine material fine screening device 6 includes a screen box 601, a strong magnetic attraction 602, a liftable limit plate 603, a hydraulic lifting device 604, a vibration table 605, a reinforced channel steel 606, a vibration motor 607, a bracket channel steel 608, a spring shock absorber 609 and a fixed baffle 610;

[0115] The screen box 601 is used to hold the fine material falling from the drum screen 202, and its cross-sectional shape is set to be circular, and strong magnetic suction 602 is arranged at the upper and lower edges of the screen box 601;

[0116] The vibration table 605 is located below the screen box 601, and the vibration of the vibration table 605 is controlled to help screen the fine material;

[0117] The liftable limit plate 603 is arranged in a ring shape on the outer edge of the vibration table 605;

[0118] The hydraulic lifting device 604 is located at the lower side of the liftable limit plate 603, and controls the liftable limit plate 603 to be lifted or lowered by the hydraulic system;

[0119] The reinforcing channel steel 606 is located at the bottom of the vibration table 605 and is used to strengthen the structural strength of the vibration table 605 to ensure the stability and durability of the equipment during operation;

[0120] The vibration motor 607 is installed on one side of the reinforced channel steel 606 as the power source for driving the vibration table 605. The vibration motor 607 uses a vertical motor as an excitation source to force the vibrating body of the screen machine to make horizontal, vertical and inclined three-dimensional movements to ensure that the material can be effectively screened in the screen box;

[0121] A support channel steel 608 is provided at the bottom of the reinforced channel steel 606. The support channel steel 608, as a part of the main structure of the equipment, supports the entire screening device to ensure its structural stability. A spring shock absorber 609 is installed between the vibration table 605 and the support channel steel 608 to absorb vibration and impact, reduce the impact of vibration on other parts of the equipment, and also reduce noise;

[0122] The fixed baffle 610 is fixed on the frame 207, and the fixed baffle 610 is located on the right side of the screen box 601;

[0123] The number of sieve boxes 601 is set to be multiple, and multiple sieve boxes 601 are stacked on the vibration table 605 from bottom to top in sequence for grading and screening fine materials. Two adjacent sieve boxes 601 are fixed by strong magnetic attraction 602, which not only ensures the screening efficiency but also protects the equipment, ensuring that each sieve box 601 is tightly connected during the vibration screening process, which is very critical, because during the vibration screening process, strong vibration may cause displacement or loosening between the sieve boxes 601, affecting the screening effect and may cause material leakage or equipment damage;

[0124] The sieve holes on the surfaces of the plurality of sieve boxes 601 increase in diameter from bottom to top. The embodiment provided in this scheme is preferably a six-layer sieve box 601, and the sieve hole diameters of the six-layer sieve box 601 are 25 mm, 12.5 mm, 6 mm, 3 mm, 0.5 mm and 0 mm, respectively.

[0125] Before the fine material screening device 6 starts screening, the lifting limit plate 603 is lifted to limit the bottom layer of the screen box 601, and the other screen boxes 601 are also fixed together by the strong magnetic attraction 602. The entire screen box stack is fully vibrated as a whole on the vibration table 605, and the material is fully and evenly screened; when the screening is completed, the lifting limit plate 603 is lowered to allow the screen box 601 to be pushed to the top of the weighing mechanism 7 by the push rod 502 of the screen box displacement device 5, and weighed. The known weight of the screen box 601 is subtracted to obtain the weight of the material in each particle size range in the screen box 601;

[0126] The distance from the lower end of the fixed baffle 610 to the vibration table 605 is L, and the thickness of the screen box 601 is h, then h<L<2h;

[0127] When the push rod 502 of the screen box displacement device 5 pushes the screen box 601, the fixed baffle 610 limits the horizontal displacement of the screen box 601 except the bottom layer, and only allows the bottom layer of the screen box 601 to pass through. The shear force is sufficient to overcome the strong magnetic force to displace the screen box 601.

[0128] As a preferred embodiment of the weighing mechanism 7:

[0129] like Figure 1 and 8 As shown, the weighing mechanism 7 includes a platform scale 701 and a weighing platform 702, and the weighing platform 702 is located on one side of the platform scale 701;

[0130] The platform scale 701 is used for independent weighing of fine materials and coarse materials, the left side of the weighing platform 702 is adjacent to the vibration table 605, and the plane of the weighing platform 702 and the plane of the vibration table 605 are located on the same horizontal plane;

[0131] The weighing platform 702 is used to place the sieve box 601 pushed by the push rod 502, and weigh the weight of the material in the same particle size range in each sieve box 601;

[0132] A flap 703 is movably provided at one end of the weighing platform 702 near the outlet end 303, and a driving motor is provided at the end of the flap 703. The output end of the driving motor drives the flap 703 to twist. Before the coarse material is screened, the flap 703 is erected to stop the coarse material rolling out of the coarse material channel 3; after the coarse material is weighed and recovered, the flap 703 is lowered to allow the screening box 601 to pass through.

[0133] As a preferred embodiment of the material recovery device 8:

[0134] like Figure 1 and 8 As shown, the material recovery device 8 includes an annular gripper 801, a rotary joint 802, a connecting arm 803, a restrictive slide rail 804 and a third bracket 805;

[0135] The third bracket 805 is arranged on the outside of the platform scale 701, and the limiting slide rail 804 is arranged on the inner top of the third bracket 805 and is located directly above the platform scale 701. A connecting arm 803 is movably arranged in the limiting slide rail 804, and an electric push rod is arranged at the end of the limiting slide rail 804. The output end of the electric push rod drives the connecting arm 803 to make the connecting arm 803 move on the path of the limiting slide rail 804;

[0136] The annular gripper 801 fits the shape of the sieve box 601 and is used to clamp the sieve box 601 so that the sieve box 601 can be lifted and moved;

[0137] Both sides of the bottom of the connecting arm 803 are rotatably connected with a rotating joint 802, and the other end of the rotating joint 802 is connected to the annular gripper 801, so that the screen box 601 can be turned over by rotating the rotating joint 802 after being lifted, and is used for dumping and recovering fine materials;

[0138] The top of the connecting arm 803 is configured as a telescopic structure for adjusting the distance between the annular grippers 801 on both sides to meet different operating requirements.

[0139] When the device is in use, the rockfill material excavated from the density pit of the rockfill dam is transported upward by the vertical feeder 1, enters the drum screen device 2 through the discharge port 102, and is fully turned over by the drum screen 202. The coarse material leaves from the right coarse material outlet 208 and enters the coarse material channel 3, and the fine material leaves from the lower fine material outlet 206 and enters the fine material fine screening device 6. The coarse material rolls along the channel slide 304 of the coarse material channel 3. During the rolling process, the three-dimensional laser scanner 4 scans the coarse material and generates point cloud data for three-dimensional model reconstruction, and the data is transmitted to the data storage Device 10, it is worth noting that, before the whole system is operated, the flap 703 of the weighing mechanism 7 is erected to stop the coarse material rolling out from the outlet end 303 of the coarse material channel 3, and the coarse material finally enters the weighing mechanism 7 from the outlet end 303 of the coarse material channel 3 for weighing, and the weighing is recorded by the accumulation method. The calculation method is as follows: assuming that the weighing weight of the first n stones is W1, and the measured weight of the n+1th stone after it falls into the weighing mechanism 7 is W2, then the weight of the n+1th stone is W2-W1, and the data is also transmitted to the data storage device 10; wait for the coarse material to be weighed. While the materials are being weighed, the fine materials enter the fine material screening device 6, the lifting limit plate 603 is lifted to clamp the bottom layer of the screen box 601, and the remaining screen boxes 601 are also fixed together by strong magnetic attraction 602, ensuring that the entire screen box stack is as a whole, and the vibration motor 607 is started to force the vibration table 605 to make horizontal, vertical and inclined three-dimensional movements, so that the fine materials can be fully and evenly graded and screened; when the screening is completed, the lifting limit plate 603 is lowered, and the flap 703 of the weighing mechanism 7 is lowered to allow the screen box 601 to be screened. The push rod 502 of the box displacement device 5 is pushed to the top of the weighing mechanism 7. During the pushing process, the fixed baffle 610 limits the horizontal displacement of the bottom layer of the sieve box 601, and only allows the bottom layer of the sieve box 601 to pass through. After weighing, the known weight of the sieve box 601 is subtracted to obtain the weight of the material in each particle size range; the data is recorded in the data storage device 10. After completion, the data storage device 10 inputs the data into the result processing and visualization device 11 to perform data analysis and output the particle grading curve image to realize data visualization.

[0140] The above is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A rockfill dam material gradation detection device based on a drum screen, characterized in that: It comprises a vertical feeder (1), a drum screen device (2), a coarse material channel (3), a three-dimensional laser scanner (4), a screen box displacement device (5), a fine material fine screening device (6), a weighing mechanism (7), a material recovery device (8), a power device (9), a data storage device (10) and a result processing and visualization device (11); The vertical loader (1) is used to transport the rock pile upwards, and the drum screen device (2) is located on one side of the vertical loader (1), receives the rock pile transmitted by the vertical loader (1), and fully turns the rock pile to separate it into fine material and coarse material; The coarse material channel (3) is used to receive the coarse material screened by the drum screen device (2) and transmit it to the weighing mechanism (7) for weighing, and the weighing mechanism (7) is also used to weigh the fine material; A three-dimensional laser scanner (4) is installed on both sides of the coarse material channel (3). When the coarse material is rolling, the coarse material is scanned and point cloud data is generated for three-dimensional model reconstruction. The data is transmitted to a data storage device (10) and finally aggregated and sent to a result processing and visualization device (11) for data processing and visualization. The fine material fine screening device (6) receives the fine material screened by the drum screen device (2) and classifies and screens the fine material. The screen box displacement device (5) is installed on one side of the fine material fine screening device (6) and is used to push the screened fine material down. The weighing mechanism (7) is used in combination with the material recovery device (8) to recover the screened rockfill material after weighing it; The power device (9) is electrically connected to the vertical feeder (1), the drum screen device (2), the three-dimensional laser scanner (4), the screen box displacement device (5), the fine material fine screening device (6), the weighing mechanism (7), the material recovery device (8), the power device (9), the data storage device (10), and the result processing and visualization device (11) to provide power thereto.

2. The device for detecting gradation of rockfill dam materials based on drum screen according to claim 1, characterized in that: The vertical loading machine (1) comprises a feeding pipe (101), a discharging port (102), a driving roller (103), a transmission belt (104), a material box (105), a power supply access portion (106) and a machine body (107); The feed pipe (101) and the discharge port (102) are respectively located at the lower left and upper right positions of the body (107), and both the feed pipe (101) and the discharge port (102) penetrate the side wall of the body (107); Two driving rollers (103) with driving motors are arranged inside the machine body (107); a transmission belt (104) is commonly connected between the outer sides of the two driving rollers (103); a plurality of evenly distributed material boxes (105) are arranged on the transmission belt (104); the material box (105) is lifted upward on a side close to the material inlet pipe (101); the opening of the lifted material box (105) faces upward; and a gap is provided between the end of the material box (105) and the machine body (107); The driving motor at the end of the driving roller (103) is electrically connected to the power device (9) via a wire extending from the power supply access portion (106), so that the driving roller (103) rotates in a clockwise direction.

3. The device for detecting gradation of rockfill dam materials based on drum screen according to claim 1, characterized in that: The drum screen device (2) comprises a feed pipe (201), a drum screen (202), a limit ring (203), a motor (204), a coupling (205), a fine material outlet (206), a frame (207), a coarse material outlet (208) and a first bracket (209); The drum screen (202) is arranged at an angle, a coupling (205) is provided at the inner axis of the drum screen (202), and the coupling (205) is connected to the drum screen (202) via four mutually perpendicular first brackets (209), so that the drum screen (202) and the coupling (205) rotate synchronously; The feed pipe (201) and the coarse material outlet (208) are respectively located at the left and right openings of the drum screen (202), and the top end of the feed pipe (201) is butted against the outlet (102), the output end of the feed pipe (201) extends into the left opening of the drum screen (202), and the feed pipe (201) does not contact the inner wall of the drum screen (202); The feed pipe (201) is fixed on the frame (207), the coupling (205) is tilted, and the two ends of the coupling (205) are rotatably connected to the feed pipe (201) and the frame (207) respectively; The motor (204) is mounted on the frame (207), and the output shaft of the motor (204) is connected to the coupling (205) via a belt drive; At least two limiting rings (203) are provided on the outer wall of the drum screen (202) along the axial direction, and limiting rails matching the limiting rings (203) are provided on the frame (207); The fine material outlet (206) is located at the bottom of the drum screen (202) and is used to transmit the fine material, and the fine material outlet (206) is fixedly connected to the frame (207).

4. The device for detecting gradation of rockfill dam materials based on drum screen according to claim 1, characterized in that: The coarse material channel (3) comprises an inlet end (301), a surrounding baffle (302), an outlet end (303), a channel slide (304), a second bracket (305) and a flexible covering material (306); The channel slide (304) is configured as a spiral descending structure for restricting the movement path of the coarse material, and the channel slide (304) is mounted on the top of the second bracket (305); A flexible covering material (306) is provided on the channel slide (304) to absorb the kinetic energy of the coarse material and reduce the rolling speed of the coarse material; The inlet end (301) and the outlet end (303) are respectively located at the head and tail ends of the channel slide (304), and the inlet end (301) is tightly connected to the coarse material outlet (208), and the outlet end (303) is connected to the right side of the weighing mechanism (7); An enclosing baffle (302) is provided between the two sides of the top of the channel slide (304), forming a blocking cover at the top of the inlet end (301).

5. The device for detecting gradation of rockfill dam materials based on drum screen according to claim 1, characterized in that: The screen box displacement device (5) comprises a power traction device (501), a push rod (502), a limit guide rail (503), a slide block (504) and a base (505); The base (505) serves as a supporting structure, is fixed on the ground, and contains an electronic control system for controlling the movement of the mechanical system; A limit guide rail (503) is provided inside the base (505), a slider (504) is slidably connected to the limit guide rail (503), and a power traction device (501) is provided at the end of the limit guide rail (503), and the power traction device (501) is used to provide power to the slider (504) to enable the push rod (502) to move telescopically.

6. The device for detecting gradation of rockfill dam materials based on drum screen according to claim 1, characterized in that: The fine material fine screening device (6) comprises a screening box (601), a strong magnetic attraction (602), a liftable limit plate (603), a hydraulic lifting device (604), a vibration table (605), a reinforced channel steel (606), a vibration motor (607), a bracket channel steel (608), a spring shock absorber (609) and a fixed baffle (610); The sieve box (601) is used to accommodate fine materials dropped from the drum screen (202), and its cross-sectional shape is set to be circular, and strong magnetic suction (602) is arranged at the upper and lower edges of the sieve box (601); The vibration table (605) is located below the screen box (601), and the vibration of the vibration table (605) is controlled to help screen the fine material; The liftable limit plate (603) is arranged in a ring shape on the outer edge of the vibration table (605); The hydraulic lifting device (604) is located at the lower side of the liftable limit plate (603), and controls the lifting and lowering of the liftable limit plate (603) through the hydraulic system; The reinforcing channel steel (606) is located at the bottom of the vibration table (605) and is used to strengthen the structural strength of the vibration table (605); A vibration motor (607) is installed on one side of the reinforced channel steel (606) and serves as a power source for driving the vibration table (605); A support channel steel (608) is provided at the bottom of the reinforcing channel steel (606), and a spring shock absorber (609) is installed between the vibration table surface (605) and the support channel steel (608); The fixed baffle (610) is fixed on the frame (207), and the fixed baffle (610) is located on the right side of the screen box (601).

7. The device for detecting gradation of rockfill dam materials based on drum screen according to claim 6, characterized in that: The number of the sieve boxes (601) is set to be multiple, and the multiple sieve boxes (601) are sequentially stacked on the vibration table (605) from bottom to top; The diameters of the sieve holes on the surfaces of the plurality of sieve boxes (601) increase from bottom to top, and are used for grading and screening fine materials; Before the fine material screening device (6) starts screening, the liftable limit plate (603) is lifted to limit the bottom layer of the screen box (601), and the remaining screen boxes (601) are also fixed together by strong magnetic attraction (602). The entire screen box stack is stacked on the vibration table (605) as a whole and is fully vibrated, so that the material is fully and evenly screened; when the screening is completed, the liftable limit plate (603) is lowered to allow the screen box (601) to be pushed to the top of the weighing mechanism (7) by the push rod (502) of the screen box displacement device (5) for weighing. By subtracting the known weight of the screen box (601), the weight of the material in each particle size range in the screen box (601) can be obtained.

8. The device for detecting gradation of rockfill dam materials based on drum screen according to claim 6, characterized in that: The distance between the lower end of the fixed baffle (610) and the vibration table (605) is L, and the thickness of the sieve box (601) is h , then it satisfies h<L< 2h ; When the push rod (502) of the screen box displacement device (5) pushes the screen box (601), the fixed baffle (610) limits the horizontal displacement of the screen boxes (601) except the bottom layer, and only allows the bottom layer of screen boxes (601) to pass through, and the shear force is sufficient to overcome the strong magnetic force to cause the screen box (601) to be displaced.

9. The device for detecting gradation of rockfill dam materials based on drum screen according to claim 1, characterized in that: The weighing mechanism (7) comprises a platform scale (701) and a weighing platform (702), wherein the weighing platform (702) is located on one side of the platform scale (701); The platform scale (701) is used for independently weighing fine materials and coarse materials, the left side of the weighing platform (702) is adjacent to the vibration table (605), and the plane of the weighing platform (702) and the plane of the vibration table (605) are located on the same horizontal plane; The weighing platform (702) is used to place the sieve boxes (601) pushed by the push rod (502) and weigh the weight of materials in the same particle size range in each sieve box (601); A flap (703) is movably provided at one end of the weighing platform (702) near the outlet end (303), and a driving motor is provided at the end of the flap (703). The output end of the driving motor drives the flap (703) to twist. Before the coarse material is screened, the flap (703) is erected to stop the coarse material rolling out of the coarse material channel (3); after the coarse material is weighed and recovered, the flap (703) is lowered to allow the sieve box (601) to pass through.

10. The device for detecting gradation of rockfill dam materials based on drum screen according to claim 1, characterized in that: The material recovery device (8) comprises an annular gripper (801), a rotating joint (802), a connecting arm (803), a restrictive slide rail (804) and a third bracket (805); The third bracket (805) is arranged on the outside of the platform scale (701), the limiting slide rail (804) is arranged on the top of the inside of the third bracket (805) and is located directly above the platform scale (701), a connecting arm (803) is movably arranged in the limiting slide rail (804), an electric push rod is arranged at the end of the limiting slide rail (804), and the output end of the electric push rod drives the connecting arm (803) to make the connecting arm (803) move on the path of the limiting slide rail (804); The annular gripper (801) fits the shape of the sieve box (601) and is used to clamp the sieve box (601) so that the sieve box (601) can be lifted and moved; Both sides of the bottom of the connecting arm (803) are rotatably connected to a rotating joint (802), and the other end of the rotating joint (802) is connected to the annular gripper (801), so that the sieve box (601) can be turned over by rotating the rotating joint (802) after being lifted, so as to dump and recover fine materials; The top of the connecting arm (803) is arranged as a telescopic structure, which is used to adjust the distance between the annular grippers (801) on both sides.

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