Automatic detection device for water content of concrete sand

Abstract

The utility model discloses an automatic detection device for the water content of concrete sand. The automatic detection device comprises a main body part, a detection part and a control part, the main body part comprises a barrel, a drainage plate, a first conveying mechanism, a water storage tank, a water pump, a base and a conveying seat; the cylinder body is of an insulator hollow structure; a first chamber, a second chamber, a third chamber and a fourth chamber are sequentially arranged in an inner cavity of the barrel from top to bottom; a first electrode plate is arranged at the bottom of the second bin, a second electrode plate is arranged at the bottom of the third bin, the first conveying mechanism is adopted for automatic sample feeding, automatic detection is achieved, and real-time feeding and real-time detection can be achieved; meanwhile, the water content of the concrete sand is detected by utilizing the structural design in the cylinder, the first electrode plate and the second electrode plate, so that the water content of the sand sample to be detected can be accurately measured. The technical problems that the moisture content of an over-dry to-be-detected sand sample cannot be accurately measured, and the moisture content of the to-be-detected sand sample cannot be automatically detected in real time are solved.

Description

Technical Field

[0001] The present application relates to the technical field of concrete sand moisture content detection, and in particular to an automatic detection device for concrete sand moisture content. Background Art

[0002] Concrete is a composite material formed by bonding fine aggregate and coarse aggregate with cement (cement paste) and hardening after a period of time. Concrete is an important building material for modern construction. During the production and operation of concrete, the proportion and water consumption of each component in concrete directly affect the performance of concrete and even the safety of the project. The amount of water used in concrete is closely related to the water content of sand. However, since the water content of the actual sand used is inconsistent with the reference state specified by the mix ratio, the actual amount of sand should be adjusted according to its water content based on the reference amount, which requires the determination of the water content of sand.

[0003] The commonly used method for determining moisture content is the drying method. The basic process is to extract a representative sample, measure its mass in the actual state, then dry the sand sample by microwave or oven to remove its moisture, and then measure its mass in the dry state, and then calculate the mass percentage of moisture in the sample, that is, the moisture content of the sand sample. This method is cumbersome, time-consuming and inefficient. If it is dried by microwave, it is also dangerous to the operator. It cannot meet the requirements of fast and safe measurement of concrete sand sample moisture content on the construction site, nor can it meet the requirements of the unmanned and intelligent development trend of the concrete industry.

[0004] In the application document with application number 202221110409.5, an automatic detection system device for moisture content of sand and gravel is disclosed, including a shell, a detection platform is arranged in the shell, a driving device is arranged above the detection platform, a detection device is fixed on the driving device, a sand storage device is arranged below the detection platform, a through hole is opened on the detection platform corresponding to the sand storage device, the driving device drives the detection device to move downward, and the detection device contacts the surface of the sand stored in the sand storage device after passing through the through hole, so as to perform contact detection on the moisture content of the sand.

[0005] The sand and gravel moisture content automatic detection system device directly measures the moisture content of the sand material to be tested by contacting the detection device with the sand material surface; the metal probe in the detection device can also contact the sand material surface to detect the resistivity in the sand material, and the data processor collects the resistivity signal, and then the control circuit board calculates the moisture content of the sand material to be tested according to the pre-calibrated moisture content and resistivity relationship curve and the resistivity signal transmitted by the data processor. However, the existing device cannot accurately measure the moisture content of the sand sample to be tested that is too dry, and cannot automatically detect the moisture content of the sand sample to be tested in real time. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of the utility model is to provide an automatic detection device for the moisture content of concrete sand, so as to solve the technical problems of being unable to automatically detect the moisture content of the sand sample to be tested in real time and being unable to accurately measure the moisture content of the sand sample to be tested that is too dry.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] An automatic detection device for the moisture content of concrete sand comprises a main body, a detection part and a control part, wherein the main body is electrically connected to the detection part, and the detection part is electrically connected to the control part;

[0009] The main body comprises a cylinder, a guide plate, a first conveying mechanism, a water storage tank, a water pump, a base and a transport seat; the first conveying mechanism, the water storage tank, the water pump and the transport seat are fixedly arranged on the base respectively;

[0010] The cylinder is an insulator hollow structure; the inner cavity of the cylinder is provided with a first chamber, a second chamber, a third chamber and a fourth chamber from top to bottom in sequence; the bottom of the first chamber is connected to the top of the second chamber, the bottom of the second chamber is connected to the top of the third chamber, and the bottom of the third chamber is connected to the top of the fourth chamber; a first electrode plate is provided at the bottom of the second chamber, and the first electrode plate is horizontally slidably connected to the second chamber; a second electrode plate is provided at the bottom of the third chamber, and the second electrode plate is horizontally slidably connected to the third chamber; a first opening, a second opening and a third opening are respectively provided on the side wall of the cylinder;

[0011] The detection part includes a weighing device, a data processor, a first control circuit board, a second control circuit board and a display screen; the weighing device, the data processor, the first control circuit board and the second control circuit board are respectively connected to the cylinder; the first control circuit board is electrically connected to the second control circuit board, the first control circuit board is electrically connected to the data processor, the second control circuit board is electrically connected to the weighing device, and the first control circuit board and the second control circuit board are respectively electrically connected to the display screen;

[0012] The weighing device is arranged at the bottom of the second electrode plate, and is slidably connected to the bottom of the third chamber together with the second electrode plate;

[0013] The control part includes a PLC controller and a control mechanism, the control mechanism is electrically connected to the PLC controller, and the PLC controller is electrically connected to the second control circuit board.

[0014] Furthermore, a sealing plate is provided at the bottom of the first chamber, and the sealing plate is horizontally slidably connected to the first chamber.

[0015] Furthermore, a side box is provided on the left side of the outer wall of the second chamber. The side box is an internal hollow structure, and a spiral stirring device and a movable bottom plate are provided in its inner cavity. The movable bottom plate is fixedly connected to the spiral stirring device.

[0016] Furthermore, the spiral stirring device comprises a spiral stirrer, a one-way electric telescopic rod and a fixed block; the spiral stirrer is fixedly connected to the movable end of the one-way electric telescopic rod through a bearing.

[0017] Furthermore, the first opening is arranged on the right side wall of the first chamber and is located on the right side of the sealing plate, and the width of the first opening is consistent with the width of the sealing plate; the second opening is arranged on the right side wall of the second chamber and is located on the right side of the first electrode plate, and the width of the second opening is consistent with the width of the first electrode plate; the third opening is arranged on the right side wall of the third chamber and is located on the right side of the second electrode plate, and the width of the third opening is consistent with the width of the second electrode plate.

[0018] Furthermore, movable baffles are respectively provided at the first opening, the second opening and the third opening.

[0019] Furthermore, flexible bristles are provided below the movable baffle.

[0020] Furthermore, the first conveying mechanism includes a first conveyor belt, a first motorized roller shaft and a second motorized roller shaft; one end of the first conveyor belt is movably sleeved on the first motorized roller shaft, and the other end of the first conveyor belt is movably sleeved on the second motorized roller shaft.

[0021] Furthermore, the transport seat includes a support plate and a second conveying mechanism; a hollow area is provided on the support plate, and a second conveying mechanism is provided in the hollow area; the second conveying mechanism includes a second conveyor belt, a third electric roller shaft and a fourth electric roller shaft; one end of the second conveyor belt is movably connected to the third electric roller shaft, and the other end is movably connected to the fourth electric roller shaft.

[0022] Furthermore, a discharge port is provided at the bottom of the fourth chamber and is located above the second conveying mechanism.

[0023] It can be seen from the above technical solutions that compared with the prior art, the utility model has the following advantages:

[0024] The automatic detection device for the moisture content of sand for concrete provided by the utility model realizes real-time automatic detection of the moisture content of the sand sample to be tested; through the optimized design of the detection device structure, the water storage tank is connected to the cylinder structure, which is used for the accurate detection of the moisture content of the sand sample to be tested that is too dry, thereby increasing the applicable scope of the sand sample to be tested, improving the detection accuracy of the moisture content of the sand sample to be tested and meeting the unmanned and intelligent development requirements of the concrete industry.

[0025] The sand sample to be tested is transported into the cylinder by the first conveyor belt in the device, and the second and third chambers in the cylinder perform resistivity detection on the sand sample to be tested, thereby realizing automatic sampling detection; the moisture content of the sand sample to be tested can be accurately obtained through corresponding calculations by the first control circuit board and / or the second control circuit board, and the PLC controller, thereby realizing rapid detection of the moisture content of concrete sand; the sand sample to be tested after the detection is completed is transported by the second conveyor belt, and the entire detection process does not require manual intervention, thereby improving detection efficiency and reducing the time for detecting the moisture content of concrete sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of an automatic detection device for the moisture content of concrete sand according to the utility model;

[0027] Figure 2 This is a front cross-sectional view of a cylinder of an automatic detection device for moisture content of concrete sand according to the utility model;

[0028] Figure 3 This is a right view of the cylinder of an automatic detection device for moisture content of concrete sand according to the utility model;

[0029] Figure 4 This is a right sectional view of a cylinder of an automatic detection device for moisture content of concrete sand according to the utility model;

[0030] Figure 5 This is a schematic diagram of the internal structure of a side box of an automatic detection device for the moisture content of concrete sand according to the utility model;

[0031] Figure 6 This is a schematic diagram of the structure of the first transmission mechanism of an automatic detection device for the moisture content of concrete sand according to the utility model;

[0032] Figure 7 It is a partial top view of the first transmission mechanism of an automatic detection device for moisture content of concrete sand according to the utility model;

[0033] Figure 8 It is a top view of a transport base of an automatic detection device for moisture content of concrete sand according to the utility model;

[0034] Fig. 9 The utility model is a schematic diagram of the structure of the second transmission mechanism of the automatic detection device for the moisture content of concrete sand.

[0035] Wherein, the accompanying drawings are marked as follows:

[0036] 1. Cylinder; 101. First chamber; 1011. Closing plate; 1012. Feed port; 1013. First opening; 1014. First movable baffle; 1015. First flexible bristle; 1016. First slide rail; 1017. First slider; 102. Second chamber; 1021. First electrode plate; 1023. Second opening; 1024. Second movable baffle; 1025. Second flexible bristle; 1026. Second slide rail; 1027. Second slider; 103. Third chamber; 1031. Second electrode plate; 1032. Water inlet; 1033. Third opening; 1034. Third movable baffle; 1035. Third flexible bristle; 1036. Third slide rail; 1037. Third slider; 104. Four chambers; 1041, discharge port; 105, side box; 1051, movable bottom plate; 1052, spiral agitator; 1053, one-way electric telescopic rod; 1054, fixed block; 2, drainage plate; 3, first transmission mechanism; 301, first conveyor belt; 302, first electric roller shaft; 303, second electric roller shaft; 4, water storage tank; 5, water pump; 6, base; 7, transport seat; 701, support plate; 702, second transmission mechanism; 7021, second conveyor belt; 7022, third electric roller shaft; 7023, fourth electric roller shaft; 8, first mounting frame; 9, second mounting frame; 10, weighing machine; 11, data processor; 12, first control circuit board; 13, second control circuit board; 14, display screen. DETAILED DESCRIPTION

[0037] In order to make the technical personnel in the technical field better understand the scheme of the present application, the technical scheme in the embodiment of the present application will be clearly and completely described below in combination with the drawings in the embodiment of the present application. Obviously, the described embodiment is only a part of the embodiment of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. In the description of the embodiment of the present application, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the embodiment of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiment of the present application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0039] In one embodiment, for ease of understanding, see Figures 1 to 9 The utility model provides an automatic detection device for the moisture content of concrete sand, comprising: a main body part, a detection part and a control part, the main body part is electrically connected to the detection part, and the detection part is electrically connected to the control part.

[0040] The main body includes a cylinder 1, a guide plate 2, a first conveying mechanism 3, a water storage tank 4, a water pump 5, a base 6 and a transport seat 7, and the first conveying mechanism 3, the water storage tank 4, the water pump 5 and the transport seat 7 are fixedly arranged on the base 6. Specifically, a first mounting frame 8 is fixedly arranged on the base 6, so that the first conveying mechanism 3 is fixedly arranged above the base 6 through the first mounting frame 8. A second mounting frame 9 is fixedly arranged on the base 6, so that the transport seat 7 is fixedly arranged above the base 6 through the second mounting frame 9. The cylinder 1 is fixedly arranged on the transport seat 7, and one end of the guide plate 2 is connected to the cylinder 1, and the other end is connected to the first conveying mechanism 3. The water inlet end of the water pump 5 is connected to the water outlet of the water storage tank 4, and the water outlet end is connected to the cylinder 1. The water storage tank 4 is pre-stored with detection water, and when the detection water is needed, it can be quickly provided, simplifying the detection process, saving the waiting time during the detection process, thereby saving the detection time and achieving the purpose of rapid detection.

[0041] The cylinder 1 is an insulator hollow structure, specifically a rectangular parallelepiped, and its inner cavity is provided with a first chamber 101, a second chamber 102, a third chamber 103 and a fourth chamber 104, and each chamber is arranged in sequence from top to bottom along the vertical direction. The bottom of the first chamber 101 is connected to the top of the second chamber 102, the bottom of the second chamber 102 is connected to the top of the third chamber 103, and the bottom of the third chamber 103 is connected to the top of the fourth chamber 104.

[0042] Specifically, a feed port 1012 is provided at the top of the first chamber 101, one end of the guide plate 2 is connected to the feed port, and the other end is connected to the first conveying mechanism 3, and the sand sample to be tested transported by the first conveying mechanism 3 is introduced into the first chamber 101 from the feed port through the guide plate 2. A sealing plate 1011 is provided at the bottom of the first chamber 101, and the sealing plate 1011 is slidably connected to the first chamber 101; a horizontal first slide rail 1016 and a first slider 1017 are provided between the sealing plate 1011 and the first chamber 101; the first slide rail 1016 is fixedly arranged on both sides of the inner side of the bottom of the first chamber 101, and the first slider 1017 is fixedly arranged on both sides of the sealing plate 1011. The first opening 1013 is arranged on the right side wall of the first chamber 101, and is located on the right side of the sealing plate 1011, and the width of the first opening 1013 is consistent with the width of the sealing plate 1011. The first opening 1013 is opened, and the sealing plate 1011 can be horizontally moved to the outside of the cylinder 1 through the first slide rail 1016 and the first slider 1017, that is, the sealing plate 1011 is pulled out, so that the first chamber 101 is connected with the second chamber 102.

[0043] A first electrode plate 1021 is provided at the bottom of the second chamber 102, and the first electrode plate 1021 is slidably connected to the second chamber 102; a horizontal second slide rail 1026 and a second slider 1027 are provided between the first electrode plate 1021 and the second chamber 102; the second slide rail 1026 is fixedly arranged on both sides of the inner side of the bottom of the second chamber 102, and the second slider 1027 is fixedly arranged on both sides of the first electrode plate 1021. The first electrode plate 1021 can be horizontally moved to the outside of the cylinder 1 through the second slide rail 1026 and the second slider 1027, that is, the first electrode plate 1021 is pulled out, so that the second chamber 102 is connected to the third chamber 103.

[0044] A side box 105 is provided on the left side of the outer wall of the second chamber 102. The side box 105 is a hollow structure, and a spiral stirring device and a movable bottom plate 1051 are provided in its inner cavity. The movable bottom plate 1051 is fixedly connected to the spiral stirring device. The spiral stirring device includes a spiral stirrer 1052, a one-way electric telescopic rod 1053 and a fixed block 1054; the spiral stirrer 1052 is fixedly connected to the movable end of the one-way electric telescopic rod 1053 through a bearing, so that the spiral stirrer 1052 can move up and down through the one-way electric telescopic rod 1053 without affecting its own rotation. The other end of the one-way electric telescopic rod 1053 is fixedly connected to the fixed block 1054, the fixed block 1054 is fixedly connected to the movable bottom plate 1051, and the movable bottom plate 1051 is slidably connected to the side box 105. Specifically, the movable bottom plate 1051 and the top of the side box 105 are respectively provided with a horizontal first slider 1017 and a first slide rail 1016 (that is, the movable bottom plate 1051 and the sealing plate 1011 share the same slide rail (first slide rail 1016), and the two sides of the movable bottom plate 1051 are provided with sliders (first sliders 1017) identical to the two sides of the sealing plate 1011). The side box 105 is connected to the second chamber 102, and the connection between the second chamber 102 and the side box 105 is provided with a side box opening of the same size as the side box 105. By opening the side box opening, the movable bottom plate 1051 can be slidably connected to the second chamber 102, so that the spiral agitator 1052 is driven by the movable bottom plate 1051 to slide horizontally into the second chamber 102.

[0045] Water inlets 1032 are respectively provided in the left and right side walls of the third chamber 103, and the water inlets 1032 are connected to the water pump 5, so that water can be supplied from the water storage tank 4 through the water pump 5 and flow into the third chamber 103. A second electrode plate 1031 is provided at the bottom of the third chamber 103, and the second electrode plate 1031 is slidably connected to the third chamber 103; a horizontal third slide rail 1036 and a third slider 1037 are provided between the second electrode plate 1031 and the third chamber 103, and the third slide rail 1036 is arranged on both sides of the inner side of the bottom of the third chamber 103, and the third slider 1037 is arranged on both sides of the second electrode plate 1031. The second electrode plate 1031 can be horizontally moved to the outside of the cylinder 1 through the third slide rail 1036 and the third slider 1037, that is, the second electrode plate 1031 is pulled out, so that the third chamber 103 is connected with the fourth chamber 104.

[0046] A discharge port 1041 is provided at the bottom of the fourth chamber 104 and is located above the second conveying mechanism 702, so that the sand sample after inspection can fall onto the second conveying mechanism 702 through the discharge port 1041 and be transported to a designated location for collection by the second conveying mechanism 702, thereby reducing the workload of workers in collection and improving inspection efficiency.

[0047] The side wall of the cylinder 1 is respectively provided with a first opening 1013, a second opening 1023 and a third opening 1033. Specifically, the first opening 1013 is provided on the right side wall of the first chamber 101 and is located on the right side of the sealing plate 1011, and the width of the first opening 1013 is consistent with the width of the sealing plate 1011. The second opening 1023 is provided on the right side wall of the second chamber 102 and is located on the right side of the first electrode plate 1021, and the width of the second opening 1023 is consistent with the width of the first electrode plate 1021. The third opening 1033 is provided on the right side wall of the third chamber 103 and is located on the right side of the second electrode plate 1031, and the width of the third opening 1033 is consistent with the width of the second electrode plate 1031.

[0048] The first conveying mechanism 3 is used to automatically transport the sand sample to be tested. The first conveying mechanism 3 includes a first conveyor belt 301, a first motorized roller shaft 302 and a second motorized roller shaft 303; one end of the first conveyor belt 301 is movably sleeved on the first motorized roller shaft 302, and the other end is movably sleeved on the second motorized roller shaft 303. The first motorized roller shaft 302 and the second motorized roller shaft 303 are respectively mounted at the two ends of the top of the first mounting frame 8. The first motorized roller shaft 302 and the second motorized roller shaft 303 are started to rotate synchronously clockwise, and at the same time, the first conveyor belt 301 is driven to automatically transport the sand sample to be tested into the cylinder 1 for testing.

[0049] Specifically, the guide plate 2 is mounted at the position of the second electric roller shaft 303 at the top of the first mounting frame 8. The connection between the guide plate 2 and the first mounting frame 8 is concave and contacts the first conveyor belt 301, which does not affect the operation of the first conveyor belt 301 and can receive the sand sample transported on the first conveyor belt 301. The end of the guide plate 2 close to the first conveyor belt 301 is higher than the end close to the cylinder 1. The guide plate 2 uses the gravity of the sand sample to smoothly slide the sand sample into the cylinder 1.

[0050] The transport seat 7 includes a support plate 701 and a second transport mechanism 702; the support plate 701 is arranged above the base 6 through the second mounting frame 9, a hollow area is arranged on the support plate 701, and the second transport mechanism 702 is arranged in the hollow area; the second transport mechanism 702 includes a second conveyor belt 7021, a third electric roller shaft 7022 and a fourth electric roller shaft 7023, one end of the second conveyor belt 7021 is movably sleeved on the third electric roller shaft 7022, and the other end is movably sleeved on the fourth electric roller shaft 7023. The second conveyor belt 7021 is used to transport the sand sample after the test, and the third electric roller shaft 7022 and the fourth electric roller shaft 7023 rotate synchronously clockwise under the control of the transmission shaft control module, driving the second conveyor belt 7021 to transport the sand sample after the test to the outside of the cylinder 1.

[0051] Specifically, the cylinder 1 is erected above the hollow area of ​​the support plate 701 and is connected to the support plates 701 on both sides of the hollow area. The discharge port 1041 at the bottom of the fourth chamber 104 in the cylinder 1 is aligned with the second conveyor belt 7021 of the second conveying mechanism 702 in the hollow area, so that the support plate 701 supports the cylinder 1 above the second conveyor belt 7021 without affecting the conveying operation of the second conveyor belt 7021.

[0052] In one embodiment, movable baffles are respectively provided at the first opening 1013, the second opening 1023 and the third opening 1033, and specifically, the movable baffles include a first movable baffle 1014, a second movable baffle 1024 and a third movable baffle 1034. The movable baffles are used to block the outer side of the cylinder 1 from the inner cavity of the cylinder 1, to prevent pollutants such as dust or rainwater on the outer side of the cylinder 1 from entering the inner cavity of the cylinder 1, and also to prevent the sand sample to be tested in the inner cavity of the cylinder 1 from flowing out from the opening, thereby affecting the detection accuracy of the water content.

[0053] Specifically, the top of the movable baffle is connected to the first opening 1013, the second opening 1023 and the third opening 1033 of the outer wall of the cylinder 1 through a fixed shaft, so that the movable baffle 12 can be turned outward and opened. The movable baffle has a certain thickness and weight, and can withstand the pressure of the sand sample to be tested in the chamber on the side wall of the chamber. When the sand sample to be tested is accumulated in the chamber, the sand sample to be tested will not cause the movable baffle to turn outward, so as to flow out of the inner cavity of the cylinder 1.

[0054] Flexible bristles are provided below the movable baffle, specifically, the flexible bristles include first flexible bristles 1015, second flexible bristles 1025 and third flexible bristles 1035. When the sealing plate 1011, the first electrode plate 1021 and the second electrode plate 1031 are horizontally moved to the outside or inside of the cylinder 1, the first flexible bristles 1015, the second flexible bristles 1025 and the third flexible bristles 1035 can respectively remove the sand sample to be tested or external dust, rainwater and other pollutants remaining on the upper surface of the sealing plate 1011, the first electrode plate 1021 and the second electrode plate 1031, thereby ensuring the detection accuracy of the moisture content and avoiding the influence of the residual sand sample on the detection accuracy. The flexible bristles are densely arranged below the movable baffle, so that when the sand sample to be tested is accumulated in the chamber, the sand sample to be tested will not flow out of the inner cavity of the cylinder 1.

[0055] The detection part includes a weighing device 10, a data processor 11, a first control circuit board 12, a second control circuit board 13 and a display screen 14; the weighing device 10, the data processor 11, the first control circuit board 12 and the second control circuit board 13 are respectively connected to the cylinder 1; the first control circuit board 12 is electrically connected to the second control circuit board 13, the first control circuit board 12 is electrically connected to the data processor 11, the second control circuit board 13 is electrically connected to the weighing device 10, and the first control circuit board 12 and the second control circuit board 13 are respectively electrically connected to the display screen 14.

[0056] Specifically, the weighing device 10 is disposed at the bottom of the second electrode plate 1031, and is slidably connected to the bottom of the third chamber 103 together with the second electrode plate 1031. When the sand sample to be tested is piled in the third chamber 103, the weight of the sand sample to be tested piled in the third chamber 103 can be detected, and the detected weight signal of the sand sample to be tested is transmitted to the second control circuit board 13. The data processor 11 is disposed on the outer wall of the third chamber 103, and is electrically connected to the second electrode plate 1031. The data processor 11 is used to collect the resistivity signal emitted by the second electrode plate 1031, and convert the resistivity signal of the sand sample to be tested into an electrical signal and transmit it to the first control circuit board 12.

[0057] The control part includes a PLC controller and a control mechanism, the control mechanism is electrically connected to the PLC controller, and the PLC controller is electrically connected to the second control circuit board 13. The PLC controller is arranged in the base 6, and is used to realize the automatic control of each module and switch. The control mechanism includes a start switch, a pause switch, a plate sealing control module, an electrode plate control module, a roller control module, a water pump control module, a stirrer control module, an electric telescopic rod control module, and a movable bottom plate control module.

[0058] The start switch and the pause switch are both set on the outer wall of the cylinder 1. The start switch is used to control the device to start running, and the pause switch is used to control the device to stop running. The sealing plate control module is used to control the movement of the sealing plate 1011, the electrode plate control module is used to control the movement and power-on of the first electrode plate 1021 and the second electrode plate 1031, the roller control module is used to control the operation of the first electric roller 302, the second electric roller 303, the third electric roller 7022 and the fourth electric roller 7023, the water pump control module is used to control the operation of the water pump 5, the agitator control module is used to control the operation of the spiral agitator 1052, the electric telescopic rod control module is used to control the operation of the unidirectional electric telescopic rod 1053, and the movable bottom plate control module is used to control the movement of the movable bottom plate 1051.

[0059] The working principle includes:

[0060] Before testing the moisture content of the sand sample to be tested, the resistivity of the sand sample with known moisture content is first tested, and the resistivity of multiple groups of sand samples with different moisture contents is measured to draw a relationship curve between the moisture content of the sand sample and the resistivity; and the water injection volume calculation formula and the moisture content calculation formula of the over-dry sand sample to be tested are pre-calibrated (refer to the prior art, application number 202221110409.5).

[0061] When the test is officially started, the start switch is pressed, and the first conveying mechanism 3 transports the sand sample to be tested to the inner cavity of the cylinder 1 through the drainage plate 2, and the sealing plate 1011 and the first electrode plate 1021 are opened, so that the sand sample to be tested falls on the second electrode plate 1031. When the weighing device 10 detects that the weight of the sand sample to be tested accumulated in the third chamber 103 reaches the pre-calibrated value, the sealing plate 1011 and the first electrode plate 1021 are closed. At this time, the sand sample to be tested temporarily falls into the first chamber 101 and cannot affect the subsequent test process. The first electrode plate 1021 contacts the upper surface of the sand sample to be tested in the third chamber 103, and the first electrode plate 1021 and the second electrode plate 1031 start to be energized, and the resistivity of the sand sample to be tested is detected and the resistivity data is transmitted to the data processor 11. The data processor 11 converts the resistivity of the sand sample to be tested into an electrical signal and transmits it to the first control circuit board 12;

[0062] If the resistivity of the sand sample to be tested is not "0", the first control circuit board 12 calculates the moisture content corresponding to the resistivity of the sand sample to be tested according to the pre-calculated relationship curve, and transmits the moisture content data of the sand sample to be tested to the display screen 14. At the same time, the second conveying mechanism 702 starts to operate, and the second electrode plate 1031 opens, so that the sand sample to be tested in the third chamber 103 falls into the fourth chamber 104, and accurately falls on the second conveying mechanism 702 through the discharge port 1041 of the fourth chamber 104, and is transported out by the second conveying mechanism 702.

[0063] If the resistivity of the sand sample to be tested is "0" (that is, the sand sample to be tested is too dry), the first control circuit board 12 transmits the resistivity data of the sand sample to be tested to the second control circuit board 13. The second control circuit board 13 calculates the water injection amount according to the current weight of the sand sample to be tested in the third chamber 103 transmitted by the weighing device 10 and the pre-calibrated water injection amount calculation formula. The water pump 5 draws the injection amount from the water storage tank 4 and transports it to the third chamber 103 through the water injection port 1032. At the same time, the first electrode plate 1021 is opened, and the movable bottom plate 1051 drives the spiral stirrer 1052 to move from the side box 105 to the top of the third chamber 103. The spiral stirrer 1052 is started and moved down to the third chamber 103 through the one-way electric telescopic rod 1053 to fully and evenly stir the sand sample to be tested in the third chamber 103. After stirring, the spiral stirrer 1052 is reset to the side box 105 and stops running, and the first electrode plate 1021 is closed again;

[0064] The first electrode plate 1021 and the second electrode plate 1031 start to be energized, detect the resistivity of the sand sample to be tested after water injection and transmit the resistivity data to the data processor 11, the data processor 11 converts the resistivity of the sand sample to be tested after water injection into an electrical signal and transmits it to the first control circuit board 12, the first control circuit board 12 calculates the water content corresponding to the resistivity of the sand sample to be tested after water injection according to the pre-calculated relationship curve, and transmits the water content data of the sand sample to be tested after water injection to the second control circuit board 13.

[0065] The second control circuit board 13 calculates the moisture content of the over-dry sand sample to be tested according to the moisture content corresponding to the resistivity of the sand sample to be tested after water injection and the pre-calibrated moisture content calculation formula of the over-dry sand sample to be tested, and transmits the moisture content of the over-dry sand sample to be tested to the display screen 14. At the same time, the second conveying mechanism 702 starts to operate, and the second electrode plate 1031 is opened, so that the sand sample to be tested in the third chamber 103 falls into the fourth chamber 104, accurately falls on the second conveying mechanism 702 through the discharge port 1041 of the fourth chamber 104, and is transported out through the second conveying mechanism 702.

[0066] An automatic detection device for the moisture content of concrete sand provided in the embodiment of the utility model solves the technical problems that the moisture content of the sand sample to be tested that is too dry cannot be accurately measured and the moisture content of the sand sample to be tested cannot be automatically detected in real time, realizes real-time automatic detection of the moisture content of the sand sample to be tested and accurate detection of the moisture content of the sand sample to be tested that is too dry, increases the application scope of the sand sample to be tested, improves the detection accuracy of the moisture content of the sand sample to be tested, improves the detection efficiency, and reduces the time for detecting the moisture content of concrete sand.

[0067] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and various changes and modifications relative to the aforementioned embodiments still fall within the scope of protection of the present utility model.

Claims

1. An automatic detection device for the moisture content of concrete sand, It is characterized in that It includes a main body part, a detection part and a control part, the main body part is electrically connected to the detection part, and the detection part is electrically connected to the control part; The main body comprises a cylinder (1), a guide plate (2), a first conveying mechanism (3), a water storage tank (4), a water pump (5), a base (6) and a transport seat (7); the first conveying mechanism (3), the water storage tank (4), the water pump (5) and the transport seat (7) are respectively fixedly arranged on the base (6); The cylinder (1) is an insulating hollow structure; the inner cavity of the cylinder (1) is provided with a first chamber (101), a second chamber (102), a third chamber (103) and a fourth chamber (104) in order from top to bottom; the bottom of the first chamber (101) is connected to the top of the second chamber (102), the bottom of the second chamber (102) is connected to the top of the third chamber (103), and the bottom of the third chamber (103) is connected to the top of the fourth chamber (104); a first electrode plate (1021) is provided at the bottom of the second chamber (102), and the first electrode plate (1021) is horizontally slidably connected to the second chamber (102); a second electrode plate (1031) is provided at the bottom of the third chamber (103), and the second electrode plate (1031) is horizontally slidably connected to the third chamber (103); a first opening (1013), a second opening (1023) and a third opening (1033) are respectively provided on the side wall of the cylinder (1); The detection part comprises a weighing device (10), a data processor (11), a first control circuit board (12), a second control circuit board (13) and a display screen (14); the weighing device (10), the data processor (11), the first control circuit board (12) and the second control circuit board (13) are respectively connected to the cylinder (1); the first control circuit board (12) is electrically connected to the second control circuit board (13), the first control circuit board (12) is electrically connected to the data processor (11), the second control circuit board (13) is electrically connected to the weighing device (10), and the first control circuit board (12) and the second control circuit board (13) are respectively electrically connected to the display screen (14); The weighing device (10) is arranged at the bottom of the second electrode plate (1031), and is slidably connected to the bottom of the third chamber (103) together with the second electrode plate (1031); The control part comprises a PLC controller and a control mechanism, the control mechanism is electrically connected to the PLC controller, and the PLC controller is electrically connected to the second control circuit board (13).

2. The automatic detection device for moisture content of concrete sand according to claim 1, It is characterized in that A sealing plate (1011) is provided at the bottom of the first chamber (101), and the sealing plate (1011) is horizontally slidably connected to the first chamber (101).

3. The automatic detection device for moisture content of concrete sand according to claim 1, It is characterized in that A side box (105) is provided on the left side of the outer wall of the second chamber (102); the side box (105) is an internal hollow structure, and its inner cavity is provided with a spiral stirring device and a movable bottom plate (1051); the movable bottom plate (1051) is fixedly connected to the spiral stirring device.

4. The automatic detection device for moisture content of concrete sand according to claim 3, It is characterized in that The spiral stirring device comprises a spiral stirrer (1052), a one-way electric telescopic rod (1053) and a fixed block (1054); the spiral stirrer (1052) is fixedly connected to the movable end of the one-way electric telescopic rod (1053) via a bearing.

5. The automatic detection device for moisture content of concrete sand according to claim 2, It is characterized in that The first opening (1013) is arranged on the right side wall of the first chamber (101) and is located on the right side of the sealing plate (1011), and the width of the first opening (1013) is consistent with the width of the sealing plate (1011); the second opening (1023) is arranged on the right side wall of the second chamber (102) and is located on the right side of the first electrode plate (1021), and the width of the second opening (1023) is consistent with the width of the first electrode plate (1021); the third opening (1033) is arranged on the right side wall of the third chamber (103) and is located on the right side of the second electrode plate (1031), and the width of the third opening (1033) is consistent with the width of the second electrode plate (1031).

6. The automatic detection device for moisture content of concrete sand according to claim 5, It is characterized in that The first opening (1013), the second opening (1023) and the third opening (1033) are each provided with a movable baffle.

7. The automatic detection device for moisture content of concrete sand according to claim 6, It is characterized in that Flexible bristles are arranged below the movable baffle.

8. The automatic detection device for moisture content of concrete sand according to claim 1, It is characterized in that The first conveying mechanism (3) comprises a first conveyor belt (301), a first motorized roller shaft (302) and a second motorized roller shaft (303); one end of the first conveyor belt (301) is movably sleeved on the first motorized roller shaft (302), and the other end is movably sleeved on the second motorized roller shaft (303).

9. The automatic detection device for moisture content of concrete sand according to claim 1, It is characterized in that The transport seat (7) comprises a support plate (701) and a second transport mechanism (702); a hollow area is provided on the support plate (701), and the second transport mechanism (702) is provided in the hollow area; the second transport mechanism (702) comprises a second conveyor belt (7021), a third electric roller shaft (7022) and a fourth electric roller shaft (7023); one end of the second conveyor belt (7021) is movably sleeved on the third electric roller shaft (7022), and the other end is movably sleeved on the fourth electric roller shaft (7023).

10. The automatic detection device for moisture content of concrete sand according to claim 9, It is characterized in that The fourth chamber (104) is provided with a discharge port (1041) at the bottom and is located above the second conveying mechanism (702).

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