CN112763698A - Test system and test method for indoor concrete circulating batching - Google Patents
Test system and test method for indoor concrete circulating batching Download PDFInfo
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- CN112763698A CN112763698A CN202011504347.1A CN202011504347A CN112763698A CN 112763698 A CN112763698 A CN 112763698A CN 202011504347 A CN202011504347 A CN 202011504347A CN 112763698 A CN112763698 A CN 112763698A
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- 238000012360 testing method Methods 0.000 title claims abstract description 47
- 238000010998 test method Methods 0.000 title claims description 7
- 230000007246 mechanism Effects 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 238000005070 sampling Methods 0.000 claims abstract description 12
- 239000004575 stone Substances 0.000 claims description 59
- 239000004576 sand Substances 0.000 claims description 53
- 238000000034 method Methods 0.000 claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 239000002245 particle Substances 0.000 claims description 25
- 230000008569 process Effects 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 16
- 238000012544 monitoring process Methods 0.000 claims description 16
- 238000012546 transfer Methods 0.000 claims description 9
- 239000000523 sample Substances 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 239000004615 ingredient Substances 0.000 claims description 4
- 238000007655 standard test method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 17
- 238000005303 weighing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011981 development test Methods 0.000 description 1
- 230000005571 horizontal transmission Effects 0.000 description 1
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- 238000003860 storage Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; ceramics; glass; bricks
- G01N33/383—Concrete, cement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging
- G01N15/0227—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging using imaging, e.g. a projected image of suspension; using holography
Abstract
The invention discloses a testing system and a testing method for indoor concrete circulating batching. The bottom of the aggregate bin is provided with a discharge baffle; the conveying line body is used for conveying materials obliquely upwards, the lower end of the conveying line body is positioned below the material collecting hopper, and a sampling device capable of grabbing the materials on the conveying line body is arranged on the conveying line body or beside the conveying line body; the moving frame is located on one side of the upper end of the conveying line body and can move to the area where the collecting hopper is located, a driving mechanism capable of driving the blanking hopper to move up and down relative to the moving frame is arranged on the moving frame, and a blanking valve is arranged at the bottom of the blanking hopper. The test system is used for simulating the real batching scene of the concrete production line, providing a test environment for the sensor and facilitating the acquisition of dynamic measurement data of the sensor.
Description
Technical Field
The invention relates to the technical field of testing of concrete batching, in particular to a testing system for indoor concrete circulating batching.
Background
In recent years, under the promotion of the nation and governments at all levels, the premixed concrete industry in China is rapidly developed, and the premixed concrete is the country with the largest global premixed concrete usage. However, the concrete industry in China still has the defects of low overall technical content and low intelligent degree. In order to promote the development of the concrete industry to intelligent manufacturing, different types of sensors are required to be adopted to guide and monitor the production process of the concrete industry in a digital, networked and intelligent manner. For example, in the batching process of concrete, the performance characterization of various raw materials has a great influence on the performance of concrete, so that the performance of each raw material of concrete needs to be monitored in real time, data is collected and analyzed, and then production is guided, so as to realize intelligent production of concrete.
The intelligent manufacturing of concrete production needs to rely on different types of sensors to collect data, and most of measurement is carried out under the condition of being separated from the actual production environment in the traditional test environment, so that the difference between the measured data and the actual data of the actual production environment is large, the measurement result is difficult to represent, and the measurement distortion of the sensors is caused. Therefore, measurement of the properties of various concrete raw materials requires that the sensors perform tests of the working properties in the actual production environment. However, the actual production environment of concrete is complex, which is often not conducive to performance development tests of various types of sensors and devices and observation and analysis of test results, and therefore, an indoor concrete circulating batching test system is required to simulate the real batching environment of a concrete production line, so as to perform simulation tests on various types of sensors and observe test results more intuitively, and analyze details of the results. And (4) carrying out precision adjustment on the sensor according to the test result so as to achieve the optimal working state.
The concrete batching process mainly comprises two stages of feeding and batching and weighing, wherein the feeding stage is a stage of conveying materials such as sand, stones and the like from a material pile to a storage hopper of a mixing plant by a conveying belt, and the batching and weighing stage is a stage of dropping a collecting hopper to a weighing platform through a hopper valve. The detection of the raw material performance by the sensor is mainly carried out in the two stages, so the invention provides a test platform for various sensors aiming at the two processes.
Disclosure of Invention
In view of this, an objective of the present invention is to provide a testing system for indoor concrete circulation batching, which is applied to simulate a real batching scene of a concrete production line, and provide a testing environment for a sensor, so as to facilitate obtaining dynamic measurement data of the sensor.
The invention also aims to provide a method for testing the particle size of the stones by using the test system for the indoor concrete circulating batching.
The invention also aims to provide a method for testing the water content of the sand by using the test system for the indoor concrete circulating batching.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a testing system for indoor concrete recycling batching, comprising:
the bottom of the collecting hopper is provided with a discharging baffle;
the conveying line body is used for conveying materials obliquely upwards, the lower end of the conveying line body is positioned below the material collecting hopper, and a sampling device capable of grabbing the materials on the conveying line body is arranged on the conveying line body or beside the conveying line body;
the moving frame is located on one side of the upper end of the conveying line body and can move to the area where the collecting hopper is located, the moving frame is provided with a blanking hopper and a driving mechanism capable of driving the blanking hopper to move up and down relative to the moving frame, and a blanking valve is arranged at the bottom of the blanking hopper.
In a preferred scheme of the invention, the bottom of the moving frame is provided with a roller, and the roller is provided with a locking device capable of locking the roller.
In a preferred embodiment of the present invention, the rollers are universal wheels.
In a preferred form of the invention, the sampling means comprises a robot arm capable of grasping a stone.
In a preferred scheme of the invention, the driving mechanism comprises a motor arranged on the moving frame, at least two groups of ball screw nut pairs and a transmission mechanism, each group of ball screw nut pair comprises a ball nut and a vertical screw rod, all the ball nuts are connected with the blanking hopper, and the motor is connected with all the vertical screw rods through the transmission mechanism so as to drive all the vertical screw rods to synchronously rotate.
In a preferred embodiment of the invention, the transmission mechanism comprises a transfer case connected to the output of the electric motor, the transfer case having at least two outputs, each output of the transfer case being connected to a vertical spindle by means of a transverse transmission shaft and a coupling.
In a preferred scheme of the invention, the collecting hopper is connected with a fixed bracket for supporting the collecting hopper.
In a preferred scheme of the invention, the collecting hopper is a double-bin type collecting hopper, the collecting hopper is provided with two bins, and a discharging baffle is respectively arranged below the two bins.
In a preferred aspect of the present invention, the conveyor line body includes a conveying support and a belt provided on the conveying support.
A method for testing the particle size of the stone, which applies the testing system of the circulating batching of the indoor concrete, comprises the following steps:
A. filling stones into a collecting hopper;
B. the unloading baffle plate under the aggregate bin is drawn out, so that the stones in the aggregate bin fall into the lower end of the conveyor line body;
C. the conveying line body is started, stones are conveyed towards the upper end of the conveying line body, and the stones fall into a blanking hopper from the upper end of the conveying line body;
D. in the process that the stones are conveyed by the conveying line body, the sampling device grabs the stones on the conveying line body, and high-definition camera equipment is adopted to photograph and identify the grain size of the grabbed stones;
E. and D, repeating the step D until all stones on the conveyor line body fall into the blanking hopper, measuring multiple groups of image data by the high-definition camera equipment in the process of repeating the step D, transmitting the image data to a computer for analysis, and obtaining the data of the particle size of the stones.
In a preferred embodiment of the present invention, after step E is completed, the following steps are performed:
F. the driving mechanism is started to drive the blanking hopper to ascend, then the movable frame is moved to enable the blanking hopper to move to the position right above the aggregate hopper, then the blanking valve is opened, and stones fall into the aggregate hopper from the blanking hopper to be stored.
In a preferred scheme of the invention, in the step D, after the high-definition camera device photographs and identifies the particle size of the stones, the sampling device puts the grabbed stones back onto the conveyor line body to continue to participate in the batching.
The method for testing the water content of the sand applies the testing system for the circulating batching of the indoor concrete, and comprises the following steps of:
A. filling sand into a collecting hopper;
B. the unloading baffle plate under the aggregate bin is drawn out, so that the sand in the aggregate bin falls into the lower end of the conveyor line body;
C. the conveying line body is started, sand is conveyed towards the upper end of the conveying line body, and the sand falls into a blanking hopper from the upper end of the conveying line body;
D. the driving mechanism is started to drive the blanking hopper to ascend, then the moving frame is moved to enable the blanking hopper to move to the position right above the aggregate hopper, then the blanking valve is opened, and sand falls into the aggregate hopper from the blanking hopper;
E. in the process of falling of the sand, a monitoring probe of the sand moisture content on-line monitoring sensor is placed between a falling hopper and a collecting hopper, the monitoring probe is contacted with the falling sand, data related to the moisture content is measured, and the data are transmitted to a computer.
In a preferred embodiment of the present invention, after step E is completed, the following steps are performed:
F. taking sand in a collecting hopper, and measuring the water content of the sand by adopting a method recorded in JGJ 52-2006-quality and inspection method standard for sand and stone for common concrete;
G. comparing the water content measured in the step E with the water content measured in the step F, then adjusting parameters of the sensor, and performing secondary fitting calibration on the parameters of the sensor; the measurement precision of the sensor is improved;
H. and D, repeating the steps A to E, and measuring the water content of the sand by using the sand water content on-line monitoring sensor again.
The invention has the beneficial effects that: the indoor concrete circulating batching test system provided by the invention can simulate the real batching scene of a concrete production line, provides a test environment for the sensor, and is convenient for acquiring the dynamic measurement data of the sensor and adjusting the sensor so as to improve the measurement precision of the sensor.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a schematic diagram of the loading stage of the present invention;
FIG. 3 is a schematic diagram of the construction of the drop hopper lifting stage of the present invention;
FIG. 4 is a schematic diagram of the blanking stage of the present invention for detecting the particle size of stone;
FIG. 5 is a schematic diagram of the blanking stage of the present invention for detecting the moisture content of sand.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly. In addition, the descriptions related to "preferred", "less preferred", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "preferred" or "less preferred" may explicitly or implicitly include at least one such feature.
Referring to fig. 1 to 5, the invention provides a testing system for indoor concrete circulating batching, which comprises a collecting hopper 10, a conveyor line body 9, a moving frame 13 and a blanking hopper 8 arranged on the moving frame 13.
The bottom of the aggregate bin 10 is provided with a discharge baffle 11; the conveying line body 9 is used for conveying materials obliquely upwards, the lower end of the conveying line body 9 is positioned below the aggregate bin 10, and a sampling device capable of grabbing the materials on the conveying line body 9 is arranged on the conveying line body 9 or beside the conveying line body 9; the moving frame 13 is positioned on one side of the upper end of the conveyor line body 9 and can move to the area of the collecting hopper 10, a driving mechanism capable of driving the blanking hopper 8 to move up and down relative to the moving frame 13 is arranged on the moving frame 13, and a blanking valve is arranged at the bottom of the blanking hopper 8.
The method for testing the particle size of the stone by using the test system comprises the following steps:
A. the aggregate bin 10 is filled with stones.
B. The discharge baffle 11 under the collecting hopper 10 is drawn out, so that the stones in the collecting hopper 10 fall into the lower end of the conveyor line body 9. The process simulates the ingredient weighing stage of actual production.
C. The conveyor line body 9 is started to convey the stones towards the upper end of the conveyor line body 9, so that the stones fall into the blanking hopper 8 from the upper end of the conveyor line body 9. The process simulates the process of transporting stones from the ground to the high of the batching building by a conveyor belt when actually producing concrete batching.
D. In the process that the stone is transported by the conveying line body 9, the sampling device grabs the stone on the conveying line body 9, and high-definition camera equipment is adopted to photograph and identify the particle size of the grabbed stone.
E. And D, repeating the step D until all stones on the conveyor line body 9 fall into the blanking hopper 8, measuring a plurality of groups of image data by the high-definition camera in the process of repeating the step D, transmitting the image data to a computer for analysis, and obtaining the data of the particle size of the stones, such as the average particle size, the functional relation between the average particle size and time, the maximum value and the minimum value of the particle size, the proportion of various particle size ranges and the like.
F. The actuating mechanism starts, and drive blanking fill 8 rises, then removes and remove frame 13, makes blanking fill 8 remove to the collecting hopper 10 directly over department, then opens the blanking valve, and the stone falls into the collecting hopper 10 by blanking fill 8 and stores, is convenient for detect the stone particle diameter next time.
The data of the stone particle size obtained by dynamic monitoring by adopting the method can be compared with the data of the stone particle size measured by JGJ 52-2006-standard sand and stone quality and inspection method for common concrete, so that the measurement precision of the stone particle size visual identification system can be detected, and the parameters of a sensor of the stone particle size visual identification system can be adjusted according to the detection result, thereby completing an important link in the intelligent concrete manufacturing process.
As a further improvement of the test method, in step D, after the high-definition camera device takes pictures to identify the particle size of the stones, the sampling device puts the grabbed stones back onto the conveyor line 9 to continue to participate in the batching.
The method for testing the water content of the sand by applying the test system comprises the following steps:
A. the aggregate bin 10 is filled with sand.
B. The discharge baffle 11 under the collection hopper 10 is withdrawn, so that the sand in the collection hopper 10 falls into the lower end of the conveyor line body 9. The process simulates the ingredient weighing stage of actual production.
C. The conveyor line body 9 is started to convey the sand towards the upper end of the conveyor line body 9, so that the sand falls into the blanking hopper 8 from the upper end of the conveyor line body 9. The process simulates the process of transporting sand from the ground to the high of a batching building by a conveyor belt when actually producing concrete batching.
D. The driving mechanism is started to drive the blanking hopper 8 to ascend, then the moving frame 13 is moved to enable the blanking hopper 8 to move to the position right above the aggregate hopper 10, then the blanking valve is opened, and sand falls into the aggregate hopper 10 from the blanking hopper 8.
E. During the falling of the sand, a monitoring probe 14 of the on-line monitoring sensor for the water content of the sand is placed between the falling hopper 8 and the collecting hopper 10, the monitoring probe 14 is contacted with the falling sand, data related to the water content, such as the water content of the sand and the function relation of the water content of the sand and the time, is measured, and the data is transmitted to the computer.
As a further improvement of the test method, after step E is completed, the following steps are carried out:
F. the water content of the sand in the collecting hopper 10 is measured by a method recorded in JGJ 52-2006-Standard test method for the quality of the sand and the stone for ordinary concrete.
G. And D, comparing the water content measured in the step E with the water content measured in the step F, then adjusting parameters of the sensor, and performing secondary fitting calibration on the parameters of the sensor to improve the measurement accuracy of the sensor.
H. And D, repeating the steps A to E, and measuring the water content of the sand by using the sand water content on-line monitoring sensor again.
In the test method, the online monitoring sensor for the water content of the sand can be integrated in the test system, the measurement precision of the sensor can be detected through dynamic monitoring, and the parameters of the sensor can be adjusted according to the monitoring result.
In the invention, the bottom of the moving frame 13 is provided with a roller 7, and the roller 7 is provided with a locking device capable of locking the roller. The locking device can adopt a common roller 7 lock, when the unlocking device is unlocked, the movable frame 13 can be pushed to move, and when the locking device is locked, the position of the movable frame 13 is fixed. Preferably, the roller 7 is a universal wheel, and can be steered freely.
In a preferred embodiment of the present invention, the aggregate bin 10 is a double-bin aggregate bin 10, the aggregate bin 10 has two bins, and a discharge baffle 11 is disposed below each of the two bins. The two bins can be respectively used for storing two materials of sand and stones, the design enables the device to have the function of testing the water content of the sand and the particle size of the stones, and one material can be independently unloaded for testing according to requirements.
The conveyor line body 9 includes a conveying support and a transmission belt arranged on the conveying support. The conveyer belt is driven by motor 1, can select for use the conveyer belt of different grade type according to the difference of material. For example, when the material is sand, the conveyor belt with the baffles is selected to convey the material optimally; when the material is stone, the frictional conveyor belt with patterns is selected to be optimal.
Preferably, the sampling device comprises a manipulator (not shown) capable of grasping the stone, and the manipulator may be mounted on the conveying support of the conveyor line body 9 or may be mounted on one side of the conveying support.
Referring to fig. 1, the driving mechanism includes a motor 1 disposed on the moving frame 13, at least two sets of ball screw nut pairs, and a transmission mechanism, each set of ball screw nut pair includes a ball nut 6 and a vertical screw 5, all the ball nuts 6 are connected with the blanking hopper 8, and the motor 1 is connected with all the vertical screws 5 through the transmission mechanism to drive all the vertical screws 5 to rotate synchronously. The ball screw nut pairs are preferably four in number, and by adopting such a mechanism, the respective screws can be synchronously rotated to drive the blanking hopper 8 to stably ascend and descend.
In a preferred embodiment of the present invention, the transmission mechanism includes a transfer case 2 connected to the output end of the motor 1, the transfer case 2 has two output ends, each output end of the transfer case 2 is connected to a vertical screw 5 through a horizontal transmission shaft 3 and a coupling 4, the coupling 4 can also be connected to other transmission shafts 3, and the transmission shafts are connected to the other vertical screws 5 through the coupling 4. By adopting the transmission structure, the structure is simple and practical, and the occupied space is small.
In some aspects of the present invention, the above-mentioned transmission mechanism may also adopt a timing belt mechanism or the like as a backup.
To provide support for the collection hopper 10, a fixed support for supporting the collection hopper 10 is attached to the collection hopper 10.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which can be directly or indirectly applied to other related technical fields without departing from the spirit of the present invention, are intended to be included in the scope of the present invention.
Claims (10)
1. The utility model provides a test system of indoor concrete circulation batching which characterized in that, it includes:
the device comprises a collecting hopper (10), wherein a discharging baffle (11) is arranged at the bottom of the collecting hopper (10);
the conveying line body (9) is used for conveying materials obliquely upwards, the lower end of the conveying line body (9) is positioned below the aggregate bin (10), and a sampling device capable of grabbing the materials on the conveying line body (9) is arranged on the conveying line body (9) or beside the conveying line body (9);
the moving frame (13) is located on one side where the upper end of the conveying line body (9) is located and can move to the area where the collecting hopper (10) is located, a blanking hopper (8) and a driving mechanism capable of driving the blanking hopper (8) to move up and down relative to the moving frame (13) are arranged on the moving frame (13), and a blanking valve is arranged at the bottom of the blanking hopper (8).
2. The indoor concrete circulating batching test system according to claim 1, characterized in that the bottom of said moving frame (13) is provided with a roller (7), and said roller (7) is provided with a locking device capable of locking the roller.
3. The indoor concrete circulating batching test system according to claim 1, characterized in that said driving mechanism comprises a motor (1) arranged on said movable frame (13), at least two sets of ball screw nut pairs, and a transmission mechanism, each set of ball screw nut pair comprises a ball nut (6) and a vertical screw (5), all the ball nuts (6) are connected with said blanking hopper (8), and said motor (1) is connected with all the vertical screws (5) through said transmission mechanism to drive all the vertical screws (5) to rotate synchronously.
4. The indoor concrete circulating batching test system according to claim 3, characterized in that said transmission mechanism comprises a transfer case (2) connected to the output of said motor (1), said transfer case (2) having at least two outputs, each output of the transfer case (2) being connected to a vertical screw (5) through a transverse transmission shaft (3), a coupling (4).
5. The indoor concrete circulation batching test system according to claim 1, characterized in that said collection hopper (10) is a double-bin collection hopper (10), said collection hopper (10) has two bins, and a discharge baffle (11) is respectively arranged under the two bins.
6. A method for testing the particle size of stones, which is characterized by applying the test system of the indoor concrete circulating ingredient according to any one of claims 1-5, and comprises the following steps:
A. filling stones into the aggregate bin (10);
B. the unloading baffle (11) under the aggregate bin (10) is drawn out, so that the stones in the aggregate bin (10) fall into the lower end of the conveyor line body (9);
C. the conveying line body (9) is started, stones are conveyed towards the upper end of the conveying line body (9), and the stones fall into the blanking hopper (8) from the upper end of the conveying line body (9);
D. in the process that the stones are conveyed by the conveying line body (9), the sampling device grabs the stones on the conveying line body (9), and high-definition camera equipment is adopted to photograph and identify the particle size of the grabbed stones;
E. and D, repeating the step D until all stones on the conveyor line body (9) fall into the blanking hopper (8), measuring multiple groups of image data by high-definition camera equipment in the process of repeating the step D, transmitting the image data to a computer for analysis, and obtaining the data of the particle size of the stones.
7. A test method of stone particle size as claimed in claim 6, characterized in that after step E is completed, the following steps are carried out:
F. the driving mechanism is started to drive the blanking hopper (8) to ascend, then the moving frame (13) is moved to enable the blanking hopper (8) to move to the position right above the aggregate hopper (10), then the blanking valve is opened, and stones fall into the aggregate hopper (10) from the blanking hopper (8) to be stored.
8. The method for testing the particle size of the stones according to claim 6, wherein in the step D, after the high-definition camera device photographs and identifies the particle size of the stones, the sampling device puts the grabbed stones back on the conveyor line body (9).
9. A method for testing the water content of sand, which is characterized in that the testing system of the indoor concrete circulating ingredient according to claim 1 or 5 is applied, and comprises the following steps:
A. -charging the collection hopper (10) with sand;
B. the discharging baffle (11) below the aggregate bin (10) is drawn out, so that the sand in the aggregate bin (10) falls into the lower end of the conveyor line body (9);
C. the conveyor line body (9) is started, sand is conveyed towards the upper end of the conveyor line body (9), and the sand falls into the blanking hopper (8) from the upper end of the conveyor line body (9);
D. the driving mechanism is started to drive the blanking hopper (8) to ascend, then the moving frame (13) is moved to enable the blanking hopper (8) to move to the position right above the aggregate hopper (10), then the blanking valve is opened, and sand falls into the aggregate hopper (10) from the blanking hopper (8);
E. during the falling process of the sand, a monitoring probe (14) of the on-line monitoring sensor for the water content of the sand is placed between the falling hopper (8) and the collecting hopper (10), the monitoring probe (14) is contacted with the falling sand, data related to the water content is measured, and the data are transmitted to a computer.
10. The method of testing the moisture content of sand of claim 9, wherein after step E is completed, the following steps are performed:
F. taking sand in a collecting hopper (10), and measuring the water content of the sand by adopting a method recorded in JGJ52-2006 standard test method for the quality of sand and stone for common concrete;
G. comparing the water content measured in the step E with the water content measured in the step F, then adjusting parameters of the sensor, and performing secondary fitting calibration on the parameters of the sensor; the measurement precision of the sensor is improved;
H. and D, repeating the steps A to E, and measuring the water content of the sand by using the sand water content on-line monitoring sensor again.
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Application publication date: 20210507 |