Tailing filling body test block sample preparation device and sample preparation method

Abstract

The invention discloses a tailing filling body test block sample preparation device and a sample preparation method.The tailing filling body test block sample preparation device comprises a double-shaft stirring mechanism, a batching mechanism, a feeding mechanism, a vibration table and a mold, the batching mechanism is used for accurately metering tailings and cementing materials, the double-shaft stirring mechanism is used for mixing the materials, the feeding mechanism is used for conveying the mixed materials to the mold, and the vibration table is used for vibrating the mixed materials; and the vibrating table is used for vibrating and molding the materials in the mold. According to the batching mechanism, the weighing plate and the first air cylinder are adopted for linkage control, the material weight is monitored in real time, feeding is automatically cut off, compared with traditional manual batching, the error rate is reduced to be within + / -1% from + / -5%, it is ensured that the matching of tailings and a cementing material is accurate, and the strength discreteness of a test block is reduced by 40% or above; and in cooperation with precise gap control of the feeding pipe and the push-pull plate, material residues and leakage are avoided, the problem that fine tailings are blocked during discharging is solved, and the batching efficiency is improved by more than three times.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of tailings backfill body sample preparation, and particularly relates to a tailings backfill body sample preparation device and a sample preparation method. BACKGROUND

[0002] The preparation quality of the tailings backfill body sample directly affects the accuracy of the mechanical property test of the backfill body, and the degree of automation and the rationality of the structural design of the sample preparation device are key influencing factors. The traditional sample preparation device adopts a manual weighing and batching mode, and relies on the experience of an operator to control the proportioning of tailings and cementing materials, and has the following defects:

[0003] 1. Large measurement error (error rate can reach more than ± 5%), leading to high strength discreteness of the sample;

[0004] 2. Low efficiency of manual operation, which cannot meet the batch sample preparation demand;

[0005] 3. Dust pollution is easily generated during the material pouring process, and the hopper discharge port is often blocked due to material caking, which needs frequent manual intervention. SUMMARY

[0006] In view of the problems in the prior art, the application provides the following technical scheme:

[0007] The tailings backfill body sample preparation device comprises a double-shaft stirring mechanism, a batching mechanism, a feeding mechanism, a vibrating table and a mold, the batching mechanism is used for accurately measuring tailings and cementing materials, the double-shaft stirring mechanism is used for mixing materials, the feeding mechanism is used for conveying the mixed materials to the mold, and the vibrating table is used for vibrating and forming the materials in the mold.

[0008] The batching mechanism comprises a mounting frame, a metering box, a feeding pipe, a weighing plate, a push-pull plate and a first cylinder, the metering box is fixed to the top of the mounting frame and is communicated with the feeding pipe at the bottom, the weighing plate is arranged at the bottom of the metering box and is provided with a weighing sensor for monitoring the weight of the materials in real time, and the push-pull plate is slidingly arranged in the feeding pipe and is driven by the first cylinder to control the conveying amount of the materials.

[0009] As a preferred embodiment of the above technical scheme, an anti-sticking coating is arranged on the inner wall of the metering box, the bottom is funnel-shaped and inclined towards the feeding pipe, and the gap between the inner diameter of the feeding pipe and the outer diameter of the push-pull plate is less than or equal to 0.5 mm, so as to prevent material leakage.

[0010] As a preferred embodiment of the above technical scheme, the weighing plate is electrically connected with the first cylinder, and when the weighing plate detects that the weight of the materials reaches a preset value, the first cylinder is automatically triggered to drive the push-pull plate to close the feeding pipe.

[0011] As a preferred embodiment of the above technical scheme, the double-shaft stirring mechanism comprises a stirring box, two stirring shafts, stirring blades, a belt pulley, a belt and a motor.

[0012] The two stirring shafts are arranged in parallel in the stirring box and are reversely rotated by the motor through the belt wheel and the belt, and the stirring blades are spirally and staggeredly arranged on the stirring shafts.

[0013] As a preferred form of the above technical solution, the stirring box is provided with a feeding port at the top and a discharging port at the bottom, the discharging port is communicated with a temporary storage box of a feeding mechanism, and the inner wall of the stirring box is provided with a wear-resistant lining plate, and the connection part between the stirring shaft and the stirring box is provided with a sealing bearing.

[0014] As a preferred form of the above technical solution, the motor is a variable frequency motor, the rotating speed of the stirring shaft can be adjusted to 100-300 r / min, and the belt wheel adopts an adjustable tensioning structure to ensure the stability of transmission.

[0015] As a preferred form of the above technical solution, the feeding mechanism comprises a temporary storage box, a pushing plate, a blocking plate, a connecting rod, a sealing plate, a guide hopper and a second cylinder.

[0016] The top of the temporary storage box is communicated with the discharging port of the double-shaft stirring mechanism, and the bottom is corresponded to a mold through the guide hopper.

[0017] The pushing plate is driven by the second cylinder to reciprocate in the temporary storage box, the blocking plate and the sealing plate are linked through the connecting rod to control the conveying and sealing of the material.

[0018] As a preferred form of the above technical solution, the pushing plate is arranged in close contact with the inner wall of the temporary storage box and is provided with an elastic sealing ring at the edge, and the inner wall of the guide hopper is provided with a smooth plating layer, the outlet width of the guide hopper is matched with the feeding port of the mold to ensure uniform material falling.

[0019] As a preferred form of the above technical solution, the second cylinder is electrically connected with a vibrating table, when the pushing plate pushes the material to the mold, the vibrating table is automatically triggered to start, the sealing plate is opened during the conveying of the material and is closed after the conveying is completed to prevent dust overflow.

[0020] The sampling method of the tailings backfill test block sampling device comprises the following steps,

[0021] S1, batching: the tailings and cementing materials are poured into the metering box of the batching mechanism, the weighing plate monitors the weight of the materials in real time, when the weight reaches the preset value, the first cylinder drives the push-pull plate to close the feeding pipe, and the precise metering is completed;

[0022] S2, stirring: the material falls into the stirring box of the double-shaft stirring mechanism through the feeding pipe, the motor drives the two stirring shafts to reversely rotate through the belt wheel and the belt, the spiral stirring blades uniformly mix the material, and the stirring rotating speed can be adjusted to 100-300 r / min;

[0023] S3, feeding: the mixed material falls into the temporary storage box of the feeding mechanism from the discharge port of the stirring box, the second air cylinder drives the pushing plate to push the material to the guide hopper, and the blocking plate and the sealing plate are linked through the connecting rod to open the outlet of the guide hopper to make the material fall into the mold uniformly, and the sealing plate is closed after the conveying is completed to prevent dust overflow;

[0024] S4, vibration molding: after the material falls into the mold, the second air cylinder triggers the vibration table to start, and the material in the mold is vibrated until the surface is smooth and dense, and the test block molding is completed.

[0025] The beneficial effects of the present application are:

[0026] 1, the batching mechanism of the present application adopts linkage control of the weighing plate and the first air cylinder, real-time monitoring of the material weight and automatic cut-off of the feeding, compared with the traditional manual batching error rate from ± 5% to ± 1% or less, ensuring the accurate proportion of tailings and cementitious materials, reducing the strength dispersion of test blocks by more than 40%, the funnel-shaped bottom of the measuring tank and the anti-sticking coating design, combined with the precise gap control of the feeding pipe and the push-pull plate, avoid material residue and leakage, solve the problem of blockage of fine-grained tailings, and improve the batching efficiency by more than 3 times;

[0027] 2, the double-shaft stirring mechanism of the present application forms a three-dimensional turbulent mixing field through two counter-rotating spiral stirring blades, compared with single-shaft stirring, reducing the mixing blind area by 80%, the mixing uniformity of tailings and cementitious materials is improved to more than 98%, the mixing time is shortened by 50%, the variable frequency motor can adjust the speed to adapt to the mixing needs of materials with different water contents, the wear-resistant lining plate and sealing bearing design prolong the service life of the equipment by 2 times, and the maintenance cost is reduced by 30%;

[0028] 3, the feeding mechanism of the present application drives the pushing plate and the linkage sealing structure through the second air cylinder to realize quantitative conveying of the material, avoid accumulation and blockage caused by gravity feeding, improve the conveying efficiency of fine-grained tailings by 60%, reduce dust emission by 90%, the smooth plating of the guide hopper is accurately matched with the material inlet of the mold, and the linkage triggering mechanism of the vibration table makes the test block molding density uniformity improve by 95%, the surface honeycomb pitted defect rate is reduced from 25% to less than 5%, and the reliability of mechanical property test data is significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 The structure schematic diagram of the tailings backfill test block sampling device in the embodiment is shown;

[0030] Figure 2 The structure schematic diagram of the double-shaft stirring mechanism in the embodiment is shown;

[0031] Figure 3 The structure schematic diagram of the batching mechanism in the embodiment is shown;

[0032] Figure 4 The structure schematic diagram of theFigure 3 Enlarged schematic diagram of the structure at point A in the diagram;

[0033] Figure 5 The diagram shown is a structural schematic of the feeding mechanism in the embodiment.

[0034] Explanation of reference numerals in the attached figures:

[0035] 10. Dual-shaft mixing mechanism; 11. Mixing tank; 12. Mixing shaft; 13. Mixing blade; 14. Pulley; 15. Belt; 16. Motor; 20. Batching mechanism; 21. Mounting frame; 22. Metering box; 23. Feeding pipe; 24. Weighing plate; 25. Push-pull plate; 26. First cylinder; 30. Feeding mechanism; 31. Temporary storage box; 32. Push plate; 33. Baffle plate; 34. Connecting rod; 35. Sealing plate; 36. Guide hopper; 37. Second cylinder; 40. Vibrating table; 50. Mold. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0037] Example

[0038] like Figure 1 As shown, the tailings backfill specimen preparation device includes a biaxial mixing mechanism 10, a batching mechanism 20, a feeding mechanism 30, a vibrating table 40, and a mold 50. The batching mechanism 20 is used to accurately measure the tailings and cementitious materials. The biaxial mixing mechanism 10 is used to mix the materials. The feeding mechanism 30 is used to transport the mixed materials to the mold 50. The vibrating table 40 is used to vibrate and shape the materials inside the mold 50. The mold 50 is detachable (100mm×100mm×100mm) and has a built-in pressure sensor. The pressure sensor is a PT124G-111 type pressure sensor (range 0-10MPa, accuracy 0.1%FS, waterproof and dustproof rating IP65), which is suitable for real-time monitoring of the material pressure inside the mold. Its sensitivity and durability can meet the pressure data acquisition requirements of the tailings backfill specimen forming process.

[0039] It should be noted that the integrated dual-shaft mixing mechanism 10, batching mechanism 20, feeding mechanism 30, vibrating table 40, and mold 50 form a fully automated sample preparation system. Each mechanism achieves seamless process integration through modular design (metering → mixing → conveying → molding). Full-process automated control reduces manual intervention, increasing efficiency by 5 times compared to traditional segmented sample preparation, and reducing single-batch sample preparation time from 60 minutes to 12 minutes. The modular integrated design reduces the equipment footprint by 30%, adapting to the limited working space in underground mines.

[0040] like Figure 1 , Figure 3 andFigure 4 As shown, the batching mechanism 20 includes a mounting frame 21, a metering box 22, a feeding pipe 23, a weighing plate 24, a push-pull plate 25 and a first cylinder 26. The metering box 22 is fixed on the top of the mounting frame 21 and is communicated with the feeding pipe 23 at the bottom. The weighing plate 24 is arranged at the bottom of the metering box 22 and is provided with a weighing sensor for monitoring the weight of the material in real time. The push-pull plate 25 is slidingly arranged in the feeding pipe 23 and is driven by the first cylinder 26 to control the delivery amount of the material.

[0041] Specifically, the weighing sensor is a METTLLER TOLEDO brand weighing sensor, and the specific parameters are as follows:

[0042] Model: MT1260-750kg

[0043] Range: 0-750kg

[0044] Sensitivity: 2±0.2mV

[0045] Material: stainless steel

[0046] Accuracy: OIML R60 C3

[0047] Protection level: IP67.

[0048] Figure 3 And Figure 4 As shown, the inner wall of the metering box 22 is provided with an anti-sticking coating, and the bottom is funnel-shaped and inclined towards the feeding pipe 23. The gap between the inner diameter of the feeding pipe 23 and the outer diameter of the push-pull plate 25 is ≤0.5mm to prevent material leakage.

[0049] Specifically, the bottom of the metering box 22 is funnel-shaped and inclined, and is matched with an anti-sticking coating such as a Teflon coating. The unloading inclination is ≥60°. The funnel-shaped anti-sticking design can increase the unloading speed of the material by 3 times, and can prevent the problem of clogging caused by the proportion of fine particle tailings with a particle size ≤0.074mm being ≥70%. The gap between the feeding pipe 23 and the push-pull plate 25 is ≤0.5mm, which is ensured by precise mechanical processing. The gap sealing structure can control the material leakage rate to be below 0.5%. The metering error is reduced from ±5% of the traditional manual batching to within ±1%. The accuracy of the weighing plate 24 is 0.1g. The weight data is transmitted to the PLC control system in real time. The specific model of the PLC is Siemens S7-300. This model is applied to the automatic control system related to tailings cementation filling, and can realize the monitoring and control of the system operation parameters.

[0050] Figure 3 And Figure 4 As shown, the weighing plate 24 is electrically connected with the first cylinder 26. When the weighing plate 24 detects that the weight of the material reaches the preset value, the first cylinder 26 is automatically triggered to drive the push-pull plate 25 to close the feeding pipe 23.

[0051] It should be noted that the weighing plate 24 is electrically connected with the first cylinder 26 through PLC, a weight threshold is set to automatically trigger a control logic, the stroke accuracy of the push-pull plate 25 is ±0.5mm, the closing time is ≤0.3 seconds, the automatic metering function realizes the tailings and cementitious material mixing accuracy of ±1%, the strength discreteness of the test block is reduced by 40%, the standard deviation of the mechanical property test data is ≤3%, manual attendance is not required, the single batch mixing time is shortened from 5 minutes to 1 minute, and the batch sample preparation demand is met.

[0052] As shown in Figure 1 and Figure 2 , the double-shaft stirring mechanism 10 includes a stirring box 11, two stirring shafts 12, stirring blades 13, a belt pulley 14, a belt 15 and a motor 16; the two stirring shafts 12 are arranged in parallel in the stirring box 11 and are driven to rotate reversely by the motor 16 through the belt pulley 14 and the belt 15, and the stirring blades 13 are distributed in a helical manner on the stirring shafts 12.

[0053] Specifically, the center distance of the two stirring shafts 12 is 1.5 times of the diameter of the stirring shaft, the linear speed difference of the reverse rotation is ≥1.2m / s, and a turbulent mixing field is formed. The stirring blades 13 are designed with variable pitch, and the pitch gradually changes from 200mm at the feeding end to 150mm at the discharging end. The wear-resistant lining plate (such as high manganese steel material) has a thickness of ≥10mm and a surface hardness of HRC≥55, the three-dimensional turbulent mixing field makes the material mixing uniformity reach more than 98%, the mixing blind area is reduced by 80% compared with single-shaft stirring, and the mixing time is shortened from 8 minutes to 4 minutes. The variable-pitch blade design adapts to the change of material fluidity, there is no agglomeration phenomenon when mixing tailings with high water content of 30%, and the wear-resistant lining plate prolongs the service life of the equipment by 2 times.

[0054] As shown in Figure 1 , Figure 2 and Figure 5 , the stirring box 11 is provided with a feeding port at the top and a discharging port at the bottom, and the discharging port is communicated with a temporary storage box 31 of a feeding mechanism 30; the inner wall of the stirring box 11 is provided with a wear-resistant lining plate, and the connection part of the stirring shaft 12 and the stirring box 11 is provided with a sealing bearing.

[0055] It should be noted that the feeding port is provided with a dust curtain, and the discharging port and the temporary storage box 31 are connected by flange sealing. The sealing bearing, such as the combination of skeleton oil seal and labyrinth seal, has a dustproof and waterproof level of IP65. The fully sealed structure makes the dust concentration in the workshop ≤8mg / m 3 , which meets the occupational health standard and reduces the dust emission of the traditional open stirring by 90%. The sealing bearing design prevents the material from penetrating into the bearing cavity, prolongs the maintenance period from 1 month to 6 months, and reduces the maintenance cost by 30%.

[0056] As shown in Figure 2As shown, the motor 16 is a variable frequency motor, which can adjust the rotating speed of the stirring shaft 12 to 100-300 r / min, and the belt pulley 14 adopts an adjustable tensioning structure to ensure stable transmission.

[0057] It should be noted that the variable frequency motor 16 has a speed regulation range of 100-300 r / min, and the rotating speed fluctuation is ≤±2%. The tensioning structure of the belt pulley 14 adopts spring automatic compensation, and the tensioning force fluctuation is ≤5%. The adjustable rotating speed is suitable for different material characteristics: low rotating speed (100-150 r / min) is used for high viscosity material to prevent splashing, and high rotating speed (200-300 r / min) is used for low viscosity material to quickly mix. Stable transmission ensures uniform line speed of the stirring blade, consistent material shear force, and avoids local over-mixing or insufficient mixing.

[0058] As shown in Figure 1 and Figure 5 , the feeding mechanism 30 includes a temporary storage box 31, a pushing plate 32, a blocking plate 33, a connecting rod 34, a sealing plate 35, a guide hopper 36, and a second cylinder 37. The top of the temporary storage box 31 is in communication with the discharge port of the double-shaft stirring mechanism 10, and the bottom is correspondingly connected with the mold 50 through the guide hopper 36. The pushing plate 32 is driven by the second cylinder 37 to reciprocate in the temporary storage box 31, and the blocking plate 33 and the sealing plate 35 are linked through the connecting rod 34 to control the delivery and sealing of the material.

[0059] Specifically, the gap between the pushing plate 32 and the inner wall of the temporary storage box 31 is ≤0.3 mm, and the compression amount of the elastic sealing ring (silicone rubber material) is ≥2 mm. The inner wall of the guide hopper 36 is chrome-plated, with a roughness Ra≤0.8 μm, and the outlet width difference with the feeding port of the mold 50 is ≤1 mm. The combination of precise gap and elastic sealing realizes zero leakage delivery of the material, and there is no dust during the delivery of fine-grained tailings, reducing dust emission by 90% compared with traditional gravity feeding. The smooth guide hopper increases the material delivery speed by 60%, and the error of uniformity of feeding is ≤3%, avoiding uneven density caused by material accumulation in the mold.

[0060] As shown in Figure 1 and Figure 5 , the pushing plate 32 is arranged in close contact with the inner wall of the temporary storage box 31, and the edge is provided with an elastic sealing ring; the inner wall of the guide hopper 36 is provided with a smooth plating layer, and the outlet width is matched with the feeding port of the mold 50 to ensure uniform feeding of the material. The second cylinder 37 is electrically connected with the vibration table 40, and when the pushing plate 32 pushes the material to the mold 50, the vibration table 40 is automatically triggered to start. The sealing plate 35 is opened during material delivery and closed after delivery to prevent dust overflow.

[0061] Specifically, the second cylinder 37 stroke switch is electrically connected with the vibration table 40 relay, and the triggering delay is less than or equal to 0.5 seconds. When the sealing plate 35 is closed, the sealing pressure of the outlet of the material guide hopper 36 is greater than or equal to 0.2 MPa. The linkage triggering ensures the accurate timing of the vibration (the material enters the mold immediately after the start), and the uniformity of the test block forming density reaches 95%, which is 40% higher than the manual control. The high-pressure sealing of the sealing plate prevents dust overflow during the vibration process, and avoids the influence of material back splash on equipment operation.

[0062] The sampling method of the tailings backfill test block sampling device includes the following steps,

[0063] S1, batching: the tailings and cementing materials are poured into the metering box 22 of the batching mechanism 20, the weighing plate 24 monitors the weight of the materials in real time, when the weight reaches the preset value, the first cylinder 26 drives the push-pull plate 25 to close the feeding pipe 23, and the precise metering is completed;

[0064] S2, stirring: the materials fall into the stirring box 11 of the double-shaft stirring mechanism 10 through the feeding pipe 23, the motor 16 drives the two stirring shafts 12 to rotate in opposite directions through the belt pulley 14 and the belt 15, and the spiral stirring blades 13 uniformly mix the materials, and the stirring speed can be adjusted to 100-300 r / min;

[0065] S3, feeding: the mixed materials fall into the temporary storage box 31 of the feeding mechanism 30 from the discharge port of the stirring box 11, the second cylinder 37 drives the material pushing plate 32 to push the materials to the material guide hopper 36, and the blocking plate 33 and the sealing plate 35 are linked through the connecting rod 34, the outlet of the material guide hopper 36 is opened to make the materials uniformly fall into the mold 50, and after the conveying is completed, the sealing plate 35 is closed to prevent dust overflow;

[0066] S4, vibration forming: after the materials fall into the mold 50, the second cylinder 37 triggers the vibration table 40 to start, and the materials in the mold 50 are vibrated until the surface is smooth and dense, and the test block forming is completed.

[0067] The above examples are only used to illustrate the technical solutions of the present application, and not to limit them.

Claims

1. A tailings backfill test block sampling device, characterized by, It comprises a double-shaft stirring mechanism (10), a batching mechanism (20), a feeding mechanism (30), a vibrating table (40) and a mold (50), the batching mechanism (20) is used for accurately measuring tailings and cementitious materials, the double-shaft stirring mechanism (10) is used for mixing materials, the feeding mechanism (30) is used for conveying mixed materials to the mold (50), and the vibrating table (40) is used for vibrating and forming materials in the mold (50); The batching mechanism (20) comprises a mounting frame (21), a metering box (22), a feeding pipe (23), a weighing plate (24), a push-pull plate (25) and a first cylinder (26), the metering box (22) is fixed to the top of the mounting frame (21), the bottom is communicated with the feeding pipe (23), the weighing plate (24) is arranged at the bottom of the metering box (22) and is provided with a weighing sensor, which is used for monitoring the weight of materials in real time, and the push-pull plate (25) is slidingly arranged in the feeding pipe (23) and is driven by the first cylinder (26) to control the conveying amount of materials.

2. A tailings packer block sampling device according to claim 1, characterized in that, The inner wall of the metering box (22) is provided with an anti-sticking coating, and the bottom is inclined to the feeding pipe (23) in a funnel shape, and the gap between the inner diameter of the feeding pipe (23) and the outer diameter of the push-pull plate (25) is less than or equal to 0.5 mm, so as to prevent material leakage.

3. The tailings backfill test block sampling device of claim 1, wherein, The weighing plate (24) is electrically connected with the first cylinder (26), when the weighing plate (24) detects that the weight of materials reaches a preset value, the first cylinder (26) is automatically triggered to drive the push-pull plate (25) to close the feeding pipe (23).

4. The tailings backfill test block sampling device of claim 1, wherein, The double-shaft stirring mechanism (10) comprises a stirring box (11), two stirring shafts (12), stirring blades (13), a belt pulley (14), a belt (15) and a motor (16); The two stirring shafts (12) are arranged in parallel in the stirring box (11) and are driven by the motor (16) to rotate in opposite directions through the belt pulley (14) and the belt (15), and the stirring blades (13) are arranged in a spiral shape on the stirring shafts (12) in a staggered manner.

5. The tailings packer block sampling device of claim 4, wherein, The top of the stirring box (11) is provided with a feeding port, and the bottom is provided with a discharging port, the discharging port is communicated with a temporary storage box (31) of the feeding mechanism (30), the inner wall of the stirring box (11) is provided with a wear-resistant lining plate, and the connection between the stirring shaft (12) and the stirring box (11) is provided with a sealing bearing.

6. The tailings packer block sampling device of claim 4, wherein, The motor (16) is a variable frequency motor, which can adjust the rotating speed of the stirring shaft (12) to 100-300 r / min, and the belt pulley (14) adopts an adjustable tensioning structure to ensure the stability of transmission.

7. The tailings backfill test block sampling device of claim 1, wherein, The feeding mechanism (30) comprises a temporary storage box (31), a pushing plate (32), a blocking plate (33), a connecting rod (34), a sealing plate (35), a guide hopper (36) and a second cylinder (37); The top of the temporary storage box (31) is communicated with the discharging port of the double-shaft stirring mechanism (10), and the bottom is correspondingly communicated with the mold (50) through the guide hopper (36); The pushing plate (32) is driven by the second cylinder (37) to reciprocate in the temporary storage box (31), and the blocking plate (33) and the sealing plate (35) are linked through the connecting rod (34) to control the conveying and sealing of materials.

8. The tailings packer block sampling device of claim 7, wherein, The push plate (32) is attached to the inner wall of the temporary storage box (31), and the edge is provided with an elastic sealing ring; the inner wall of the material guide hopper (36) is provided with a smooth plating layer, and the outlet width matches the material inlet of the mold (50) to ensure uniform material falling.

9. The tailings packer block sampling device of claim 7, wherein, The second cylinder (37) is electrically connected with the vibration table (40), which is automatically triggered to start after the push plate (32) pushes the material to the mold (50). The sealing plate (35) is opened during material conveying and closed after conveying to prevent dust overflow.

10. The method of sampling according to any one of claims 1 to 9, wherein The method comprises the following steps, S1, batching: pour the tailings and cementing materials into the weighing box (22) of the batching mechanism (20), and the weighing plate (24) monitors the weight of the materials in real time. When the weight reaches the preset value, the first cylinder (26) drives the push-pull plate (25) to close the feeding pipe (23), completing accurate metering; S2, stirring: the materials fall into the stirring box (11) of the double-shaft stirring mechanism (10) through the feeding pipe (23), the motor (16) drives the two stirring shafts (12) to rotate in opposite directions through the belt pulley (14) and the belt (15), and the spiral stirring blades (13) uniformly mix the materials. The stirring speed can be adjusted to 100-300 r / min; S3, feeding: the mixed materials fall into the temporary storage box (31) of the feeding mechanism (30) from the discharge port of the stirring box (11), the second cylinder (37) drives the push plate (32) to push the materials to the material guide hopper (36), and the blocking plate (33) and the sealing plate (35) are linked through the connecting rod (34) to open the outlet of the material guide hopper (36) to make the materials fall into the mold (50) uniformly. After conveying, the sealing plate (35) is closed to prevent dust overflow; S4, vibration molding: after the materials fall into the mold (50), the second cylinder (37) triggers the vibration table (40) to start, and vibrates the materials in the mold (50) until the surface is smooth and dense, completing the molding of the test block.

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