Device for detecting silt content of sand for concrete

Abstract

The utility model discloses a silt content detection device for concrete sand, which comprises an openable box body, a water inlet pipe, a water outlet pipe, a water supply system and a mixing and stirring system, the mixing and stirring system comprises a double-layer stirring barrel, a partition plate, a mesh basket, a weighing module, a stirring assembly, a drain opening, a heating assembly and the like which are arranged in the box body; an exhaust fan is further arranged on the side wall of the box body; a control unit is arranged on the front face of the box body, a controller is arranged in the control unit, and the water supply system, the stirring assembly, the heating assembly, the weighing module and the exhaust fan are electrically connected with the controller. The device for detecting the silt content of the sand for the concrete is simple to operate and easy to use, manual water adding and stirring by testers are not needed, the working intensity is effectively reduced, continuous operation detection can be realized, the test process meets the standard specification requirements, and the silt content detection result of the sand sample for the concrete is accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of building material testing devices, in particular to a device for detecting mud content in concrete sand. Background Art

[0002] As an important component of concrete, the quality of sand will directly affect the performance of concrete. In the production process of concrete sand, mud powder is inevitably mixed in. Due to its high water absorption rate, mud powder will increase the water demand of concrete and affect the working performance of concrete. In addition, the loose structure will form a weak strength area in the concrete after absorbing water, which will affect the bonding effect between cement paste and aggregate and the hydration reaction of cement, and finally lead to the deterioration of the mechanical properties, shrinkage resistance and durability of concrete. Therefore, the mud content of concrete sand needs to be strictly controlled. GB / T14684-2022 "Construction Sand" points out that mud content refers to the content of particles with a particle size of less than 75μm in natural sand. The mud content is determined by the water washing method. The detection method is: first shrink the sample and dry it to a very heavy weight, cool it to room temperature, weigh 500g of the sample, pour the sample into a washing container, inject clean water, wash the sample in the water, separate the dust, silt and clay from the gravel, and pass it through a 1.18mm and 75μm sieve to filter out particles smaller than 75μm. Repeat several times until the water in the container is visually clear. After rinsing, put the sieve together with the sample on the sieve in a drying oven and dry it to constant weight, then weigh and calculate. When measuring the mud content, the test personnel need to repeatedly inject water to waterproof and manually stir and wash. The work intensity is high and the efficiency is low. When the mud content is large, the number of washings reaches more than 10 times, and the test personnel are tired and have back pain.

[0003] At present, there are few detection devices for the mud content of concrete sand on the market, and most of the existing devices have defects such as low automation, complex operation, and high energy consumption. Therefore, it is urgent to develop a concrete sand mud content detection device that can automatically control the test process, realize continuous operation detection, accurate test results, and simple and easy-to-operate equipment. Summary of the invention

[0004] The utility model aims to provide a device for detecting mud content in concrete sand in view of the problems existing in the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A device for detecting mud content of concrete sand comprises an openable and closable box, wherein a water inlet pipe and a water outlet pipe are respectively arranged on both sides of the box, a water supply system and a mixing and stirring system are arranged inside the box, the water supply system is connected to the water inlet pipe and supplies water to the mixing and stirring system through the water supply pipe; the mixing and stirring system comprises a double-layer mixing barrel arranged inside the box, a partition plate is arranged inside the double-layer mixing barrel, a net basket is arranged above the partition plate, the net basket is used to load a sample, the net basket is supported and installed on the partition plate through a weighing module, a mixing assembly is arranged between the partition plate and the bottom of the net basket, a plurality of drain ports are arranged on the partition plates on both sides of the mixing assembly, the drain ports are connected to the lower layer of the double-layer mixing barrel, and the lower layer of the double-layer mixing barrel is connected to the water outlet pipe; a heating assembly is also arranged on the upper layer of the double-layer mixing barrel, and an exhaust fan is also arranged on the side wall of the box; a control unit is arranged on the front of the box, a controller is arranged in the control unit, and the water supply system, the mixing assembly, the heating assembly, the weighing module and the exhaust fan are electrically connected to the controller respectively.

[0007] The device for detecting mud content of concrete sand is simple to operate and easy to use. It does not require test personnel to manually add water and stir, which reduces the work intensity and can realize continuous operation detection. The sample is washed relatively cleanly, and dust, silt and miscellaneous soil in the gravel can be well separated. The test process meets the requirements of standards and specifications, and the mud content test results of concrete sand samples are accurate.

[0008] The water supply system can supply water to the mixing and stirring system in real time. The double-layer mixing barrel can use the water flow of the upper layer to wash and stir through the layered setting to separate the mud and sand, and the lower space can discharge sewage and mud and sand. The partition plate is set to facilitate the installation of the mixing component and the weighing module. The weighing module is used as a platform to support the net basket. After drying, the weight of the sand in the net basket can be directly weighed, making the measurement more convenient and quick. The mixing component can disturb the water flow below the net basket, and drive the separation of mud and sand through the flow of water.

[0009] The setting of the heating component can dry the net basket and the test samples inside it, and the exhaust fan is used to discharge water vapor during the drying process of the test samples, which is conducive to accelerating the drying speed.

[0010] The setting of the control unit, utilizing the connection between the controller and various electronic components and parts, combined with appropriate control programs and preset data, can enable the device to perform automated detection. The controller can obtain the operating status of the water supply system and the mixing and stirring system, and control the operation of the water pump, motor, valve, heating component and stirring component through instructions.

[0011] Furthermore, the water supply system includes a water tank arranged inside the box body, the water tank is connected to the water inlet pipe, a water pump is provided in the water tank, the water pump is connected to the water supply pipe, and the water supply pipe extends to the top of the double-layer mixing barrel.

[0012] Furthermore, the water supply system is also connected to a pressurized flushing gun, which is connected to the lower layer of the double-layer mixing barrel. The flushing gun can be used to clean the sewage and mud remaining in the lower layer of the double-layer mixing barrel to avoid clogging caused by long-term accumulation.

[0013] Furthermore, the stirring assembly includes a stirring shaft, stirring blades arranged on the stirring shaft, and a stirring motor that drives the stirring shaft. The stirring motor is installed on the partition plate through a motor seat. A sealing protective cover is provided on the outside of the stirring motor to perform a sealing function to prevent water from entering the stirring motor.

[0014] Furthermore, the heating component includes a heating rod or a heating wire arranged in the barrel wall interlayer of the double-layer mixing barrel, and the heating rod or the heating wire is located in the upper layer of the double-layer mixing barrel. A temperature and humidity sensor is also provided inside the box.

[0015] The heating device can be used to quickly heat the double-layer mixing barrel to evaporate the water and discharge it through the exhaust fan. Alternatively, a finished heating plate can be directly purchased and installed on the inner circumference of the double-layer mixing barrel for heating.

[0016] The temperature and humidity sensor is installed inside the box to monitor the temperature and humidity. When the internal temperature reaches the set temperature, the temperature is kept constant without overheating. When the internal temperature cools to 20±5°C, the sample mass is weighed.

[0017] Furthermore, a plurality of ultrasonic cleaners and a water level sensor are installed on the inner periphery of the upper layer of the double-layer mixing barrel, and the water level sensor is also electrically connected to the controller.

[0018] The ultrasonic cleaner and the stirring blades together form a stirring function, and a good cleaning effect can be ensured under the action of the ultrasonic cleaner. Water is discharged through the water supply pipe, and when the water level reaches the position detected by the water level sensor, the water pump is automatically shut down and the water injection is stopped. The water level sensor is set according to the test requirements and needs to be higher than the sample stacking height by more than 15mm.

[0019] Furthermore, a handle is installed on the mesh basket, and an openable and closable box cover is provided on the top of the box body facing the mesh basket. After opening the box cover, the handle can be used to conveniently take and place the mesh basket.

[0020] Furthermore, solenoid valves are respectively provided in the water inlet pipe, the water outlet pipe and the drain port, and the solenoid valves are respectively connected to the controller to control the opening and closing of the pipelines by electronic control.

[0021] Furthermore, the control unit also includes a display screen and a control button module connected to the controller, and the display screen and the control button module are respectively embedded in the front side of the box.

[0022] Furthermore, a graphics acquisition system connected to the controller is also provided in the box, and the graphics acquisition system includes a rotation drive module, a Z-shaped connecting rod and an image acquisition camera. The rotation drive module is installed on the box in a staggered vertical area where the basket is located, and one end of the Z-shaped connecting rod is connected to the rotation drive module, and the other end is connected to the image acquisition camera via a mounting plate.

[0023] The graphics acquisition system uses the image acquisition camera to collect the flushing image below, and then uses digital image analysis technology to process the image and extract feature values, so as to identify the cleanliness of the current concrete sand washing, that is, to achieve the "visually clear state" in the specification.

[0024] Compared with the prior art, the utility model has the following beneficial effects: 1. The device for detecting the mud content of concrete sand is simple to operate and easy to use. It does not require the test personnel to manually add water and stir, which reduces the work intensity and can realize continuous operation detection. Moreover, the sample is washed relatively cleanly, and the dust, silt and miscellaneous soil in the gravel can be well separated. The test process meets the requirements of the standard specifications, and the mud content detection result of the concrete sand sample is accurate; 2. The double-layer mixing barrel is arranged in layers, and the water flow of the upper layer is used to wash and stir to separate the mud and sand, and the lower space can discharge sewage and mud and sand; the arrangement of the partition plate facilitates the installation of the mixing assembly and the weighing module, and the weighing module is used as a platform to support the basket. After drying, the weight of the sand in the net basket can be directly weighed, making the measurement more convenient and quick; 3. The ultrasonic cleaner and the stirring component jointly form a stirring function. The stirring blades can disturb the water flow, and drive the separation of mud and sand through the flow of water. Under the action of the ultrasonic cleaner, a better cleaning effect can be guaranteed; 4. The setting of the heating component can dry the net basket and the test samples inside it. The exhaust fan is used to discharge water vapor during the drying process of the test samples, which is conducive to speeding up the drying speed; 5. The setting of the control unit, using the connection between the controller and various electronic components and parts, combined with appropriate control programs and preset data, can enable the device to perform automatic operation detection and reduce the burden of manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1This is a schematic diagram of the exterior structure of a device for detecting mud content in concrete sand according to the utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of a device for detecting mud content in concrete sand according to the utility model;

[0027] Figure 3 It is a schematic cross-sectional structure diagram of the water supply system and mixing and stirring system of the utility model;

[0028] In the figure: 1. Box body; 2. Water inlet pipe; 3. Water outlet pipe; 4. Display screen; 5. Control button module; 6. Box cover; 7. Double-layer mixing barrel; 8. Water storage tank; 9. Water supply pipe; 10. Water pump; 11. Water flushing gun; 12. Partition plate; 13. Weighing module; 14. Net basket; 15. Stirring shaft; 16. Stirring blade; 17. Stirring motor; 18. Sealed bearing; 19. Drain port; 20. Handle; 21. Heating component; 22. Ultrasonic cleaner; 23. Water level sensor; 24. Exhaust fan; 25. Rotation drive module; 26. Z-shaped connecting rod; 27. Image acquisition camera. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "middle", "upper", "lower", "left", "right", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0031] like Figure 1 to Figure 3As shown, a device for detecting mud content of concrete sand comprises an openable and closable box body 1, a water inlet pipe 2 and a water outlet pipe 3 are respectively arranged on both sides of the box body 1, a water supply system and a mixing and stirring system are arranged inside the box body 1, the water supply system is connected to the water inlet pipe 2 and supplies water to the mixing and stirring system through a water supply pipe 9; the mixing and stirring system comprises a double-layer mixing barrel 7 arranged inside the box body 1, a partition plate 12 is arranged inside the double-layer mixing barrel 7, a mesh basket 14 is arranged above the partition plate 12, the mesh basket 14 is used to load samples, and the mesh basket 14 is supported and installed on the partition plate 12 through a weighing module 13, A stirring assembly is provided between the partition plate 12 and the bottom of the net basket 14, and a plurality of drain ports 19 are provided on the partition plate 12 on both sides of the stirring assembly, and the drain ports 19 are connected to the lower layer of the double-layer stirring barrel 7, and the lower layer of the double-layer stirring barrel 7 is connected to the water outlet pipe 3; a heating assembly 21 is also provided on the upper layer of the double-layer stirring barrel 7, and an exhaust fan 24 is also provided on the side wall of the box body 1; a control unit is provided on the front of the box body 1, and a controller is provided in the control unit, and the water supply system, the stirring assembly, the heating assembly, the weighing module and the exhaust fan are electrically connected to the controller respectively.

[0032] The device for detecting the mud content of concrete sand is simple to operate and easy to use. It does not require the test personnel to manually add water and stir, which reduces the work intensity and can realize continuous operation detection. In addition, the sample is washed relatively cleanly, and the dust, silt and miscellaneous soil in the gravel can be well separated, which is conducive to accurately detecting the mud content in the concrete sand sample.

[0033] The water supply system can supply water to the mixing and stirring system in real time. The double-layer mixing barrel 7 is arranged in layers, and the water flow in the upper layer is used to wash and stir to separate mud and sand. The lower space can discharge sewage and mud and sand. The partition plate 12 is arranged to facilitate the installation of the mixing component and the weighing module 13. The weighing module 13 is used as a platform to support the net basket 14. After drying, the weight of the sand in the net basket 14 can be directly weighed, making the measurement more convenient and quick. The mixing component can disturb the water flow below the net basket 14, and drive the separation of mud and sand through the flow of water.

[0034] The setting of the heating component 21 can dry the net basket 14 and the test samples therein, and the exhaust fan 24 is used to discharge water vapor during the drying process of the test samples, which is conducive to accelerating the drying speed.

[0035] The setting of the control unit, utilizing the connection between the controller and various electronic components and parts, combined with appropriate control programs and preset data, can enable the device to perform automatic detection. The controller can obtain the operating status of the water supply system and the mixing and stirring system, and control the operation of the water pump, motor, valve, heating component and stirring component through instructions.

[0036] Furthermore, the water supply system includes a water tank 8 disposed inside the box body 1, the water tank 8 is connected to the water inlet pipe 2, a water pump 10 is provided inside the water tank 8, the water pump 10 is connected to the water supply pipe 9, and the water supply pipe 9 extends to the top of the double-layer mixing barrel 7. The water pump 10 can add water in the water tank 8 to the double-layer mixing barrel 7 for washing.

[0037] Furthermore, the water supply system is also connected to a pressurized flushing gun 11, which is connected to the lower layer of the double-layer mixing barrel 7. The flushing gun 11 can be used to clean the sewage and mud remaining in the lower layer of the double-layer mixing barrel 7 to avoid clogging caused by long-term accumulation.

[0038] The inner bottom surface of the lower layer of the double-layer mixing barrel 7 can be set to a slope structure, which is slightly inclined from the direction of the flushing gun 11 to the direction of the water outlet pipe 3, which is conducive to the discharge of sewage and sludge from the water outlet pipe 3.

[0039] Furthermore, the stirring assembly includes a stirring shaft 15, a stirring blade 16 arranged on the stirring shaft 15, and a stirring motor 17 that drives the stirring shaft 15. The stirring motor 17 is installed on the partition plate 12 through a motor seat. The stirring motor 17 is provided with a sealing protective cover to perform a sealing function to prevent water from entering the stirring motor.

[0040] Specifically, the stirring motor 17 is installed below the partition plate 12, the stirring shaft 15 passes through the partition plate 12 and is connected to the output end of the stirring motor 17, a sealed bearing 18 is arranged between the stirring shaft 15 and the partition plate 13, and the stirring motor 17 is used to drive the stirring shaft 15 and the stirring blade 16 to rotate. The stirring blade 16 consists of three pieces, each of which is a curved three-dimensional structure.

[0041] Furthermore, the heating assembly 21 includes heating rods arranged in the interlayer of the barrel wall of the double-layer mixing barrel 7, and the heating rods are all located in the upper layer of the double-layer mixing barrel 7. A temperature and humidity sensor is also provided inside the box body 1.

[0042] The heating device can be used to quickly heat the double-layer mixing barrel 7, evaporate the water, and discharge it through the exhaust fan 24. The temperature and humidity sensor is installed inside the box to monitor the temperature and humidity. When the internal temperature reaches the set temperature, the temperature is kept constant without overheating; when the internal temperature cools to 20±5°C, the sample mass is weighed.

[0043] Furthermore, a plurality of ultrasonic cleaners 22 and a water level sensor 23 are installed on the inner circumference of the upper layer of the double-layer mixing barrel 7, and the ultrasonic cleaners 22 and the water level sensor 23 are also electrically connected to the controller.

[0044] The ultrasonic cleaner 22 and the stirring blade 16 form a stirring function together, and a good cleaning effect can be ensured under the action of the ultrasonic cleaner 22. Water is discharged through the water supply pipe 9, and when the water level reaches the position detected by the water level sensor 23, the water pump 10 is automatically shut down and the water injection is stopped. The water level sensor 23 is set according to the test requirements, and the water level is higher than the sample stacking height by more than 15mm.

[0045] Furthermore, the mesh basket 14 uses a mesh basket with a mesh size of 75 μm, on which a handle 20 is installed. A closable box cover 6 is provided above the box body 1 opposite to the mesh basket 14. After opening the box cover 6, the handle 20 can be used to conveniently take and place the mesh basket 14.

[0046] Furthermore, solenoid valves are provided in the water inlet pipe 2, the water outlet pipe 3 and the drain port 19, respectively. The solenoid valves are connected to controllers respectively to control the opening and closing of the pipelines by means of electrical control.

[0047] Furthermore, the control unit also includes a display screen 4 and a control button module 5 connected to the controller, and the display screen 4 and the control button module 5 are respectively embedded in the front of the box 1. The control button module 5 includes at least a power switch, a parameter setting key, an internal component start and stop key, etc.

[0048] Furthermore, the box body 1 is also provided with a graphics acquisition system connected to the controller, and the graphics acquisition system includes a rotation drive module 25, a Z-shaped connecting rod 26 and an image acquisition camera 27. The rotation drive module 25 is installed on the box body 1 in a staggered vertical area where the basket 14 is located, and one end of the Z-shaped connecting rod 26 is connected to the rotation drive module 25, and the other end is connected to the image acquisition camera 27 through a mounting plate.

[0049] The rotation drive module 25 includes a drive motor and a rotating shaft, and the drive motor is used to drive the Z-shaped connecting rod 26 to rotate. The rotation drive module 25 can be a mature product available on the market. The rotation drive module 25 is set off the center to cooperate with the Z-shaped connecting rod 26 so as not to affect the placement of samples and the removal of the basket.

[0050] The image acquisition system uses the image acquisition camera 27 to collect the flushing image below, and then uses digital image analysis technology to process the image and extract feature values, so as to identify the cleanliness of the current concrete sand washing, that is, to achieve the "visually clear state" in the specification.

[0051] The image acquisition camera 27 is provided with an LED light source to assist in image acquisition in a dark internal environment. The mixing and stirring system is repeatedly filled with water, stirred and cleaned, and drained. Note that after stirring and cleaning, it needs to stand for 70 seconds before image acquisition. When the image acquisition system recognizes that the mixed liquid below has reached the set approximate cleanliness, the water is drained and the double-layer mixing barrel 7 is no longer filled with water. At this time, the pressurized flushing gun 11 is turned on to flush the lower pipeline, and the rotary drive module 25 is started to rotate the lower Z-shaped connecting rod 26 180°. At the same time, the heating component 21 is started for drying. During the drying process, the exhaust fan 24 is turned on to remove water vapor. After drying to a basically constant weight, the heating and drying system is automatically turned off, and after waiting for the inside of the box to cool to room temperature, the weight of the test sample at this time is automatically recorded. All components inside the box 1 must be wrapped with an insulating and waterproof layer to prevent damage to the equipment by high temperature environment, water and water vapor.

[0052] The mud content of the test sample can be calculated from the mass m1 of the dried sample obtained through the test. The calculation formula is: mud content of the test sample = (mass m0 of the sample before the test - mass m1 of the sample after drying) / m0 × 100%.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting mud content in concrete sand, comprising an openable and closable box, with a water inlet pipe and a water outlet pipe respectively disposed on both sides of the box, characterized in that: A water supply system and a mixing and stirring system are provided inside the box, the water supply system is connected to the water inlet pipe and supplies water to the mixing and stirring system through the water supply pipe; the mixing and stirring system comprises a double-layer mixing barrel arranged inside the box, a partition plate is provided inside the double-layer mixing barrel, a net basket is provided above the partition plate, the net basket is used to load samples, the net basket is supported and installed on the partition plate by a weighing module, a stirring assembly is provided between the partition plate and the bottom of the net basket, a plurality of drain ports are provided on the partition plates on both sides of the stirring assembly, the drain ports are connected to the lower layer of the double-layer mixing barrel, and the lower layer of the double-layer mixing barrel is connected to the water outlet pipe; a heating assembly is also provided on the upper layer of the double-layer mixing barrel, and an exhaust fan is also provided on the side wall of the box; a control unit is provided on the front of the box, a controller is provided in the control unit, and the water supply system, the stirring assembly, the heating assembly, the weighing module and the exhaust fan are electrically connected to the controller respectively.

2. The device for detecting mud content of concrete sand according to claim 1, characterized in that: The water supply system comprises a water storage tank arranged inside the box body, the water storage tank is connected to the water inlet pipe, a water pump is arranged inside the water storage tank, the water pump is connected to the water supply pipe, and the water supply pipe extends to the top of the double-layer mixing barrel.

3. The device for detecting mud content of concrete sand according to claim 1, characterized in that: The water supply system is also connected to a pressurized flushing gun, which is connected to the lower layer of the double-layer mixing barrel.

4. The device for detecting mud content of concrete sand according to claim 1, characterized in that: The stirring assembly comprises a stirring shaft, a stirring blade arranged on the stirring shaft, and a stirring motor driving the stirring shaft. The stirring motor is installed on the partition plate through a motor seat, and a sealing protective cover is arranged outside the stirring motor.

5. The device for detecting mud content of concrete sand according to claim 1, characterized in that: The heating component includes a heating rod or a heating wire arranged in the barrel wall interlayer of the double-layer mixing barrel, and the heating rod or the heating wire is located in the upper layer of the double-layer mixing barrel. A temperature and humidity sensor is also arranged inside the box.

6. The device for detecting mud content of concrete sand according to claim 1, characterized in that: A plurality of ultrasonic cleaners and a water level sensor are also installed on the inner periphery of the upper layer of the double-layer mixing barrel, and the water level sensor is also electrically connected to the controller.

7. The device for detecting mud content in concrete sand according to claim 1, characterized in that: A handle is installed on the net basket, and an openable and closable box cover is provided above the box body facing the net basket.

8. The device for detecting mud content in concrete sand according to claim 1, characterized in that: The water inlet pipe, the water outlet pipe and the water drain port are respectively provided with electromagnetic valves.

9. The device for detecting mud content in concrete sand according to claim 1, characterized in that: The control unit also includes a display screen and a control button module connected to the controller, and the display screen and the control button module are respectively embedded in the front side of the box.

10. The device for detecting mud content of concrete sand according to claim 1, characterized in that: The box body is also provided with a graphics acquisition system connected to the controller, and the graphics acquisition system includes a rotation drive module, a Z-shaped connecting rod and an image acquisition camera. The rotation drive module is installed on the box body in a staggered vertical area where the basket is located. One end of the Z-shaped connecting rod is connected to the rotation drive module, and the other end is connected to the image acquisition camera through a mounting plate.

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