Filling slurry particle size distribution testing device

Abstract

The invention discloses a device for testing particle size distribution of filling slurry. The device comprises a measuring cylinder, a weight sensor, a weight transmitter and a centralized control cloud platform, the measuring cylinder comprises a barrel body, a barrel-shaped fine filter screen, a barrel-shaped middle filter screen, a barrel-shaped coarse filter screen and a water spraying pipe, a water discharging pipe is arranged at the bottom of the barrel body, the barrel-shaped fine filter screen is arranged in the barrel body, the barrel-shaped middle filter screen is arranged in the barrel-shaped fine filter screen, the barrel-shaped coarse filter screen is arranged in the barrel-shaped middle filter screen, and one end of the water spraying pipe is arranged in the barrel-shaped coarse filter screen; a boss is fixed to the edge of the top of the barrel body along the circumference, a plurality of supporting plates are fixed to the edges of the tops of the barrel-shaped fine filter screen, the barrel-shaped middle filter screen and the barrel-shaped coarse filter screen along the circumference at intervals, a supporting rod is arranged below each supporting plate, and a weight sensor making contact with the corresponding supporting plate is fixed to each supporting rod. The device has the advantages that the measuring cylinder performs one-time grading screening and one-time weighing on particulate matters with different particle sizes in slurry, whether the particulate matters with required particle sizes are properly distributed or not is measured by calculating the weight ratio, the device is simple and visual, repeated screening and weighing are not needed, and tedious procedures are reduced.

Description

Technical Field

[0001] The present invention relates to the field of detection, and particularly to a device for testing the particle size distribution of filling slurry. Background Art

[0002] At present, the ground subsidence caused by mine exploitation has triggered many geological disasters; at the same time, the tailings produced are piled up on the surface, causing problems such as the occupation of cultivated land and environmental pollution. In response, in order to achieve the green and sustainable development of mines, the grouting filling technology has been applied to mine exploitation in recent years.

[0003] During the grouting filling operation, the particle size distribution of the filling slurry is crucial for the grouting filling operation. The particle size of the slurry not only directly affects the quality and stability of the filling body, but also affects the slurry preparation effect and the slurry transportation capacity (fluid properties), and thus is related to the safe production of coal mines and the efficiency of the filling operation.

[0004] If the particle size of the slurry (particle diameter greater than 3 mm) is too large, it will lead to insufficient compactness of the filling body and unqualified filling quality; at the same time, the too large particle size of the slurry causes a decrease in the fluidity of the slurry, a fast sedimentation rate of solid particles in the slurry, an increase in the transportation pressure, etc., resulting in safety incidents such as blockage of the slurry transportation pipeline. And if the particle size (particle diameter less than 50 μm) is too small, although it is beneficial to the transportation of the slurry, it will cause the slurry to be not easy to bleed water, increasing the curing time of the filling body; at the same time, excessive grinding increases energy consumption and equipment wear. It is preferable that the particles with a diameter of less than 3 mm and more than 1 mm in the slurry are distributed more. In the past, to test the particle size distribution of the slurry, it needed to be carried out in a laboratory, with cumbersome procedures. The test process took several hours, and after the results came out, the crushing and grinding processes on site were adjusted, which had a certain "lag", and at the same time, there were the above-mentioned safety and quality risks. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for testing the particle size distribution of filling slurry.

[0006] The present invention is implemented by the following technical solutions: A device for testing the particle size distribution of filling slurry includes a measuring cylinder, a weight sensor, a weight transmitter, and a centralized control cloud platform; The measuring cylinder includes a barrel body, a barrel-shaped fine filter screen, a barrel-shaped medium filter screen, a barrel-shaped coarse filter screen, and a water spray pipe. One side of the bottom of the barrel body is provided with a drain pipe. The barrel-shaped fine filter screen is arranged inside the barrel body, the barrel-shaped medium filter screen is arranged inside the barrel-shaped fine filter screen, the barrel-shaped coarse filter screen is arranged inside the barrel-shaped medium filter screen, one end of the water spray pipe is placed inside the barrel-shaped coarse filter screen, and a plurality of spray nozzles are arranged on one end of the water spray pipe; A boss is fixedly arranged along the circumference at the top edge of the barrel body. A plurality of support plates are fixedly arranged at intervals along the circumference at the top edges of the barrel-shaped fine filter screen, the barrel-shaped medium filter screen, and the barrel-shaped coarse filter screen. All the support plates are located above the boss. A support rod fixed to the boss is arranged below each support plate, and a weight sensor in contact with the support plate is fixed on each support rod. The signal output ends of the weight sensors corresponding to the barrel-shaped fine filter screen, the signal output ends of the weight sensors corresponding to the barrel-shaped medium filter screen, and the signal output ends of the weight sensors corresponding to the barrel-shaped coarse filter screen are respectively connected to the signal input end of a weight transmitter. The signal output ends of the three weight transmitters are all connected to the signal input end of the centralized control cloud platform through a wireless gateway.

[0007] Preferably, the barrel body is made of epoxy resin material.

[0008] Preferably, the pore diameter of the filter holes of the barrel-shaped fine filter screen is 10 - 50 μm.

[0009] Preferably, the pore diameter of the filter holes of the barrel-shaped medium filter screen is 1 mm.

[0010] Preferably, the pore diameter of the filter holes of the barrel-shaped coarse filter screen is 3 mm.

[0011] Preferably, the number of the support plates of the barrel-shaped fine filter screen, the number of the support plates of the barrel-shaped medium filter screen, and the number of the support plates of the barrel-shaped coarse filter screen are all three.

[0012] Preferably, a plurality of heating devices are further arranged on the inner wall of the barrel body; the heating devices are electric heating rods or electric heating wires.

[0013] Preferably, a warm air blower is further included. A first valve is arranged on the water spraying pipe, and the air outlet of the warm air blower is communicated with the water spraying pipe between the water spraying port and the first valve through a second valve.

[0014] Preferably, a plurality of lifting devices are further included. A lifting device is arranged below the end of each support plate. A tray matching the end of the support plate is fixed to the lifting end of the lifting device, and the tray holds up the support plate; the lifting device is an electric push rod, a hydraulic cylinder or a pneumatic cylinder.

[0015] Preferably, the support plates of the barrel-shaped fine filter screen, the barrel-shaped medium filter screen, and the barrel-shaped coarse filter screen are arranged in a staggered manner.

[0016] Advantages of the present invention: The measuring cylinder performs primary classification and screening on particulate matters with different particle sizes in the slurry, and conducts the last weighing. By calculating the weight ratio, it can be determined whether the distribution of particulate matters with the required particle size is appropriate. This method is simple and intuitive, without the need for laboratory operation tests, multiple sieving and weighing processes, reducing cumbersome procedures, saving time, facilitating timely adjustment of production parameters, avoiding "lag", and enhancing the control of quality risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a top view of the overall structure of the present invention.

[0020] Figure 3 It is a signal transmission block diagram of the present invention.

[0021] Figure 4 It is a schematic diagram of the structure of the present invention with additional heating devices, warm air blowers, etc.

[0022] Figure 5 is Figure 4 top view of

[0023] In the figure: measuring cylinder 1, barrel body 1.1, barrel-shaped fine filter screen 1.2, barrel-shaped medium filter screen 1.3, barrel-shaped coarse filter screen 1.4, water spray pipe 1.5, drain pipe 1.6, spray nozzle 1.7, weight sensor 2, weight transmitter 3, centralized control cloud platform 4, convex platform 5, support plate 6, support rod 7, heating device 8, warm air blower 9, first valve 10, second valve 11, lifting device 12, tray 13. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0025] As Figures 1 - 5 shown, a test device for the particle size distribution of filling slurry includes a measuring cylinder 1, a weight sensor 2, a weight transmitter 3, and a centralized control cloud platform 4; The measuring cylinder 1 includes a barrel body 1.1, a barrel-shaped fine filter screen 1.2, a barrel-shaped medium filter screen 1.3, a barrel-shaped coarse filter screen 1.4, and a water spray pipe 1.5. When in use, slurry is poured into the interior of the barrel-shaped coarse filter screen 1.4. Preferably, the barrel body 1.1 is made of epoxy resin material, which is transparent and convenient for observing the situation inside the barrel body 1.1; the pore diameter of the barrel-shaped fine filter screen 1.2 is 10 - 50 μm, which is used to retain the particles in the slurry and filter out the moisture in the slurry; the pore diameter of the barrel-shaped medium filter screen 1.3 is 1 mm, which is used to retain particles larger than 1 mm and filter particles smaller than 1 mm; the pore diameter of the barrel-shaped coarse filter screen 1.4 is 3 mm, which is used to retain particles larger than 3 mm and filter out particles smaller than 3 mm. One side of the bottom of the barrel body 1.1 is provided with a drain pipe 1.6. The moisture of the slurry filtered by the barrel-shaped fine filter screen 1.2 enters the barrel body 1.1 and is finally drained by the drain pipe 1.6. The barrel-shaped fine filter screen 1.2 is arranged inside the barrel body 1.1, the barrel-shaped medium filter screen 1.3 is arranged inside the barrel-shaped fine filter screen 1.2, and the barrel-shaped coarse filter screen 1.4 is arranged inside the barrel-shaped medium filter screen 1.3. There are gaps between the barrel body 1.1 and the barrel-shaped fine filter screen 1.2, between the barrel-shaped fine filter screen 1.2 and the barrel-shaped medium filter screen 1.3, and between the barrel-shaped medium filter screen 1.3 and the barrel-shaped coarse filter screen 1.4, which is conducive to the filtration of liquid. Since the barrel body 1.1, the barrel-shaped fine filter screen 1.2, the barrel-shaped medium filter screen 1.3, and the barrel-shaped coarse filter screen 1.4 are connected in a nested manner in sequence, the inner diameters of the barrel body 1.1, the barrel-shaped fine filter screen 1.2, the barrel-shaped medium filter screen 1.3, and the barrel-shaped coarse filter screen 1.4 should gradually decrease so as to be sleeved and have gaps. One end of the water spray pipe 1.5 is placed inside the barrel-shaped coarse filter screen 1.4, and a plurality of spray nozzles 1.7 are provided at one end of the water spray pipe 1.5. One end of the water spray pipe 1.5 is preferably placed in the middle of the barrel-shaped coarse filter screen 1.4. Water can be introduced into the water spray pipe 1.5, especially high-pressure water. The water spray pipe 1.5 can be fixed with a temporary support or a pipe clamp (not shown in the figure). Water will spray from the plurality of spray nozzles 1.7 towards the bottom and the periphery inside the barrel-shaped coarse filter screen 1.4, relying on the impact to accelerate the discharge of moisture in the slurry. A convex platform 5 is fixedly arranged along the circumference at the top edge of the barrel body 1.1. The convex platform 5 is annular and is integrally fixed with the top edge of the barrel body 1.1. A plurality of support plates 6 are fixedly arranged at intervals along the circumference at the top edges of the barrel-shaped fine filter screen 1.2, the barrel-shaped medium filter screen 1.3, and the barrel-shaped coarse filter screen 1.4. All the support plates 6 are located above the convex platform 5. A support rod 7 fixed to the convex platform 5 is provided below each support plate 6, and a weight sensor 2 in contact with the support plate 6 is fixed on each support rod 7. The barrel-shaped fine filter screen 1.2, the barrel-shaped medium filter screen 1.3, and the barrel-shaped coarse filter screen 1.4 are all supported on the convex platform 5 by the support rod 7 supporting the support plate 6.

[0026] Preferably, the number of support plates 6 of the barrel-shaped fine filter 1.2, the number of support plates 6 of the barrel-shaped medium filter 1.3 and the number of support plates 6 of the barrel-shaped coarse filter 1.4 are all three, so that the barrel-shaped fine filter 1.2, the barrel-shaped medium filter 1.3 and the barrel-shaped coarse filter 1.4 correspond to three weight sensors 2 respectively; The support plates 6 of the barrel-shaped fine filter 1.2, the barrel-shaped medium filter 1.3 and the barrel-shaped coarse filter 1.4 are arranged alternately to avoid mutual interference and support between the support plates 6 of the barrel-shaped fine filter 1.2, the barrel-shaped medium filter 1.3 and the barrel-shaped coarse filter 1.4.

[0027] The signal output ends of the multiple weight sensors 2 corresponding to the barrel-shaped fine filter 1.2, the signal output ends of the multiple weight sensors 2 corresponding to the barrel-shaped medium filter 1.3, and the signal output ends of the multiple weight sensors 2 corresponding to the barrel-shaped coarse filter 1.4 are respectively connected to the signal input end of a weight transmitter 3, and the signal output ends of the three weight transmitters 3 are all connected to the signal input end of the centralized control cloud platform 4 through a wireless gateway.

[0028] The signals of the three weight sensors 2 of the barrel-shaped fine filter 1.2 are transmitted to the corresponding weight transmitters 3, which are converted and transmitted to the centralized control cloud platform 4 through the wireless gateway; similarly, the signals of the three weight sensors 2 of the barrel-shaped medium filter 1.3 and the barrel-shaped coarse filter 1.4 are respectively transmitted to the corresponding weight transmitters 3, which are also converted and transmitted to the centralized control cloud platform 4 through the wireless gateway. The centralized control cloud platform 4 aggregates the weight information of the barrel-shaped fine filter 1.2, the barrel-shaped medium filter 1.3 and the barrel-shaped coarse filter 1.4 and calculates the average value and displays it for easy management. The centralized control cloud platform 4 is based on computer hardware and takes cloud computing technology as the core. By integrating advanced technologies such as sensor technology, programmable logic control (PLC) technology, and cloud computing technology, it realizes real-time monitoring and control of industrial production processes.

[0029] It also includes multiple heating devices 8 arranged on the inner wall of the barrel body 1.1; the heating devices 8 are electric heating rods or electric heating wires. When the heating devices 8 are turned on, they evaporate water through high temperature, which can accelerate the dehydration of the barrel body 1.1, the barrel-shaped fine filter 1.2, the barrel-shaped medium filter 1.3, and the barrel-shaped coarse filter 1.4, which is convenient for weighing.

[0030] It also includes a heater 9, and a first valve 10 is provided on the water spray pipe 1.5. The air outlet of the heater 9 is connected with the water spray pipe 1.5 between the nozzle 1.7 and the first valve 10 through the second valve 11. The first valve 10 is turned off, and the second valve 11 is opened. Hot air is blown toward the barrel-shaped fine filter 1.2 through the heater 9 and the water spray pipe 1.5. The high temperature is also used to evaporate water, thereby improving the dehydration effect from the barrel-shaped fine filter 1.2 to the barrel-shaped medium filter 1.3 and even the barrel-shaped coarse filter 1.4, thereby accelerating the dehydration speed.

[0031] It further includes a plurality of lifting devices 12. One lifting device 12 is provided below the end of each support plate 6. A tray 13 matching the end of the support plate 6 is fixed to the lifting end of the lifting device 12, and the tray 13 holds up the support plate 6. The lifting device 12 is an electric push rod, a hydraulic cylinder or a pneumatic cylinder.

[0032] There is one lifting device 12 respectively below the three support plates 6 of the barrel-shaped fine filter screen 1.2. There are a total of three lifting devices 12. The three lifting devices 12 support the barrel-shaped fine filter screen 1.2 to lift through their respective trays 13. When descending, it can be achieved by relying on the self-weight of the barrel-shaped fine filter screen 1.2. The rising of the barrel-shaped fine filter screen 1.2 can be separated from the contact of the weight sensor 2, avoiding affecting the stability and accuracy of the weight sensor 2 when the slurry in the barrel-shaped fine filter screen 1.2 filters water or the water spray pipe 1.5 impacts the slurry. Similarly, the barrel-shaped medium filter screen 1.3 and the barrel-shaped coarse filter screen 1.4 also have their respective three lifting devices 12 to control the lifting. When rising, when the slurry filters water or the water spray pipe 1.5 impacts the slurry, it avoids affecting the stability and accuracy of the weight sensor 2.

[0033] Working principle: The test steps are as follows: 1. Sampling and sample preparation - During the stable operation of the filling system, sampling is carried out. The sample is slurry, and the total mass of the sample is controlled at 500 - 1000 ml.

[0034] 2. Debugging the device - Clean the sundries and water stains in the barrel-shaped fine filter screen 1.2, the barrel-shaped medium filter screen 1.3, and the barrel-shaped coarse filter screen 1.4, and tare and zero each group of weight sensors 2.

[0035] 3. Water screening and sorting process - Pour the sample into the barrel-shaped coarse filter screen 1.4, and let the water spray pipe 1.5 pass water to accelerate the sorting speed of water and particulate matter in the slurry. Particles larger than 3 mm are left in the barrel-shaped coarse filter screen 1.4, and the water and particles smaller than 3 mm seep into or are filtered out to the barrel-shaped medium filter screen 1.3. Then, in the barrel-shaped medium filter screen 1.3, particles larger than 1 mm are retained, and the water and particles smaller than 1 mm seep into or are filtered out to the barrel-shaped fine filter screen 1.2. Finally, particles larger than 50 μm in the barrel-shaped fine filter screen 1.2 are left, and particles smaller than 10 μm (almost non-existent) and water seep into the barrel body 1.1 and are drained away. This stage takes 3 - 5 minutes.

[0036] 4. Dehydration and drying - When the turbidity of the filtrate below the barrel-shaped medium filter screen 1.3 and the barrel-shaped coarse filter screen 1.4 is significantly reduced, the heating device 8 can be used to quickly dry the material so that the particles have no water.

[0037] 5. Weighing - At this time, there are multiple particulate matters distributed in the barrel-shaped fine filter screen 1.2, barrel-shaped medium filter screen 1.3, and barrel-shaped coarse filter screen 1.4. The weight of each filter screen is transmitted to the centralized control cloud platform 4 for display through the weight sensors 2 and weight transmitters 3. The finally displayed weight is the average value of the weight values transmitted by the three weight sensors 2 of each filter screen. After the weight data of each group of the barrel-shaped fine filter screen 1.2, barrel-shaped medium filter screen 1.3, and barrel-shaped coarse filter screen 1.4 remain unchanged, the data is read.

[0038] 6. Data processing - Calculate the weight proportion of the weights of the three filter screens in the sample, which is equivalent to the weight ratio of the particulate matters with three particle sizes. When the weight proportion of the particulate matters with particle sizes (less than 3 mm and greater than 1 mm) in the barrel-shaped medium filter screen 1.3 reaches between 60% - 70%, it is the preferred slurry particle distribution, that is, the slurry suitable for production. Otherwise, the production parameters need to be adjusted in a timely manner according to the test results.

[0039] Advantages: The measuring cylinder 1 conducts primary classification and screening of particulate matters with different particle sizes in the slurry, and finally weighs them. By calculating the weight proportion, it can be measured whether the distribution of the particulate matters with the required particle size is appropriate. It is simple and intuitive, without the need for laboratory operation tests, multiple sieving and weighing, reducing cumbersome procedures, saving time, facilitating timely adjustment of production parameters, avoiding "lag", and enhancing the control of quality risks.

[0040] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A test device for the particle size distribution of filling slurry, characterized in that It includes a measuring cylinder, a weight sensor, a weight transmitter, and a centralized control cloud platform; The measuring cylinder includes a barrel body, a barrel-shaped fine filter screen, a barrel-shaped medium filter screen, a barrel-shaped coarse filter screen, and a water spray pipe. One side of the bottom of the barrel body is provided with a drain pipe. The barrel-shaped fine filter screen is arranged inside the barrel body. The barrel-shaped medium filter screen is arranged inside the barrel-shaped fine filter screen. The barrel-shaped coarse filter screen is arranged inside the barrel-shaped medium filter screen. One end of the water spray pipe is placed inside the barrel-shaped coarse filter screen, and a plurality of spray nozzles are arranged at one end of the water spray pipe; A convex platform is fixed along the circumference at the top edge of the barrel body. A plurality of support plates are fixedly arranged at intervals along the circumference at the top edges of the barrel-shaped fine filter screen, the barrel-shaped medium filter screen, and the barrel-shaped coarse filter screen. All the support plates are located above the convex platform. A support rod fixed to the convex platform is arranged below each support plate. A weight sensor in contact with the support plate is fixed on each support rod; The signal output ends of the weight sensors corresponding to the barrel-shaped fine filter screen, the signal output ends of the weight sensors corresponding to the barrel-shaped medium filter screen, and the signal output ends of the weight sensors corresponding to the barrel-shaped coarse filter screen are respectively connected to the signal input end of a weight transmitter. The signal output ends of the three weight transmitters are all connected to the signal input end of the centralized control cloud platform through a wireless gateway.

2. The particle size distribution testing device for filling slurry according to claim 1, characterized in that: The barrel body is made of epoxy resin material.

3. The particle size distribution testing device for filling slurry according to claim 1, wherein: The pore diameter of the filter holes of the barrel-shaped fine filter screen is 10 - 50 μm.

4. The particle size distribution testing device for filling slurry according to claim 1, characterized in that: The pore diameter of the filter holes of the barrel-shaped medium filter screen is 1 mm.

5. The particle size distribution testing device for filling slurry according to claim 1, wherein: The pore diameter of the filter holes of the barrel-shaped coarse filter screen is 3 mm.

6. The particle size distribution testing device for filling slurry according to claim 1, characterized in that: The number of the support plates of the barrel-shaped fine filter screen, the number of the support plates of the barrel-shaped medium filter screen, and the number of the support plates of the barrel-shaped coarse filter screen are all three.

7. The particle size distribution testing device for filling slurry according to claim 1, characterized in that: It further includes a plurality of heating devices arranged on the inner wall of the barrel body; the heating devices are electric heating rods or electric heating wires.

8. The particle size distribution testing device for filling slurry according to claim 1, wherein: It further includes a warm air blower. A first valve is arranged on the water spray pipe. The air outlet of the warm air blower is communicated with the water spray pipe between the spray nozzle and the first valve through a second valve.

9. The particle size distribution testing device for filling slurry according to claim 1, wherein: It further includes a plurality of lifting devices. A lifting device is arranged below the end of each support plate. A tray matching the end of the support plate is fixed at the lifting end of the lifting device. The tray supports the support plate; the lifting device is an electric push rod, a hydraulic cylinder, or a pneumatic cylinder.

10. The particle size distribution testing device for filling slurry according to claim 1, wherein: The support plates of the barrel-shaped fine filter screen, the barrel-shaped medium filter screen, and the barrel-shaped coarse filter screen are arranged in a staggered manner.

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