Rapid testing device for water-binder ratio of concrete mixture

Abstract

A rapid testing device for the water-binder ratio of a concrete mixture relates to the technical field of concrete quality detection and comprises a workbench, a support, a sampling container, a concrete gas content tester and a control mechanism, the top end of the workbench is connected with the support, the sampling container is installed on the support and provided with a weighing mechanism, and the weighing mechanism is connected with the control mechanism. A concrete gas content tester is arranged at the top of the working table below the sampling container, the weighing mechanism is in signal connection with the control mechanism through a wire, and the control mechanism is provided with a calculation module, a storage module, an input module and a display screen. The device can quickly measure the water-binder ratio of the concrete mixture, is convenient to clean, does not need to evaporate the moisture of the mixture, and further improves the test efficiency and the accuracy of the test result.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concrete quality detection, and particularly relates to a rapid testing device for water-binder ratio of concrete mixture. BACKGROUND

[0002] The concrete refers to a kind of artificial stone material, which is made of cement as main cementitious material, water, sand and gravel, and if necessary, mixed with chemical admixtures and mineral admixtures, and then mixed, compacted, hardened and cured according to appropriate proportions.The concrete is mainly divided into two stages and states: the plastic state before setting and hardening, namely fresh concrete or concrete mixture; and the hard state after hardening, namely hardened concrete or concrete.The water-binder ratio of concrete refers to the ratio of water quantity to all cementitious material quantity per cubic meter of concrete.

[0003] The prior art CN219104626U discloses a rapid measuring device for water-binder ratio of high-performance concrete, which comprises a box body, a sealing cover is arranged at the top of the box body, a motor device is fixedly installed at the top of the sealing cover, a rotating rod is arranged at one end of the motor device, a stirring rod is fixedly installed on the rotating rod, a threaded ring is arranged at the bottom of the sealing cover, a threaded groove is arranged on the box body, a sealing ring is arranged at the bottom of the sealing cover, a sealing groove is arranged on the box body, and a heater is arranged on the inner wall of the box body.

[0004] However, the above patent document has the following defects:

[0005] (1) The evaporation process of water in the concrete mixture is relatively long, and the evaporation is not clean, especially after the mixture is agglomerated, the internal water is easy to accumulate, resulting in inaccurate measurement results.

[0006] (2) After evaporation, the cementitious material is easy to adhere to the inner wall of the container, which is difficult to clean, resulting in complicated subsequent cleaning work. CONTENT OF THE INVENTION

[0007] The present application provides a rapid testing device for water-binder ratio of concrete mixture, which aims to solve the problems (1)-(2) in the prior art, and further provides a device capable of quickly measuring the water-binder ratio of concrete mixture and facilitating cleaning. The device does not need to evaporate the water in the mixture, further improving the testing efficiency and the accuracy of the test results.

[0008] To achieve the above purpose, the technical scheme of the present application is:

[0009] A concrete mixture water-binder ratio rapid testing device, including a workbench, a support, a sampling container, a concrete air content tester, a control mechanism, the top of the workbench is connected with a support, the support is installed with a sampling container, the sampling container is configured with a weighing mechanism, the top of the workbench where the sampling container is located is provided with a concrete air content tester, the weighing mechanism is connected with the control mechanism through the wire signal, the control mechanism is configured with a calculation module, a storage module, an input module and a display screen.

[0010] Preferably, the top of the workbench is provided with an inverted U-shaped support, the lower surface of the top of the U-shaped support is connected with a sampling container through a linear drive mechanism, and a scale line for marking the volume of the concrete mixture is arranged on the inner wall of the sampling container.

[0011] Preferably, the top of the side wall of the sampling container is connected with a C-shaped container connecting frame, the top of the container connecting frame is fixedly connected with a weighing mechanism, the weighing mechanism is a tension sensor, and the top of the container connecting frame is connected with the linear drive mechanism through the tension sensor.

[0012] Preferably, the linear drive mechanism comprises a linear guide rail, the top of the linear guide rail is fixedly connected with one side of the lower surface of the top of the U-shaped support, the two ends of the linear guide rail are respectively provided with mounting plates fixedly connected with the lower surface of the top of the U-shaped support, a lead screw is rotatably connected between the two mounting plates, a moving seat is screwed on the lead screw, the top of the moving seat is slidably connected with the linear guide rail, the bottom of the moving seat is connected with the tension sensor through a longitudinally arranged electric cylinder, the outer surface of the mounting plate is provided with a driving motor, the output shaft of the driving motor is connected with one end of the lead screw and used to drive the lead screw to rotate, and the driving motor and the electric cylinder are respectively electrically connected with the control mechanism through wires.

[0013] Preferably, the driving motor is a servo motor, and the concrete air content tester is a direct-reading concrete air content tester.

[0014] Preferably, a plurality of concrete mixture containers of the direct-reading concrete air content tester are arranged side by side at positions opposite to one side of the lead screw on the upper surface of the workbench, and a storage rack is further arranged on one side of the workbench, which is used to store other components of the direct-reading concrete air content tester except the concrete mixture containers.

[0015] Preferably, a cross beam is further fixedly connected between the two arms of the U-shaped support in a transverse direction, a rectangular hole is arranged in the cross beam, and the outer wall of the sampling container is separated from the inner edge of the rectangular hole.

[0016] Preferably, the rectangular hole is integrally connected with a U-shaped supporting plate away from the inner edge of one side of the shelf, the front and rear ends of the sampling container are respectively fixedly connected with overlapping plates, and the overlapping plates are used in cooperation with the U-shaped supporting plate.

[0017] Preferably, the top end of the workbench away from the shelf of the concrete mixture container of the direct-reading type concrete air content tester is further provided with a cleaning container, the bottom end of the cleaning container is provided with a sewage discharge pipe, the lower end of the sewage discharge pipe penetrates through the top of the workbench and is connected with a sewage collection tank arranged on the ground, and a valve is arranged on the sewage discharge pipe.

[0018] Preferably, the side wall of the U-shaped support is penetrated through with a high-pressure water input pipe, the bottom end of the container connecting frame is fixedly connected with a high-pressure water nozzle in the middle, the water inlet pipe of the high-pressure water nozzle penetrates through the side wall of the container connecting frame and is connected with the end of the high-pressure water input pipe through a flexible connecting pipe, an electromagnetic valve is arranged on the high-pressure water input pipe, and the electromagnetic valve is electrically connected with the control mechanism through wires.

[0019] Preferably, the sampling container comprises a container body, the bottom end of the container body is integrally connected with a conical hopper, the bottom end of the conical hopper is integrally connected with a discharge pipe, the discharge pipe is provided with an electromagnetic flow valve, and the electromagnetic flow valve is electrically connected with the control mechanism through wires.

[0020] The concrete mixture water-cement ratio rapid testing device has the following beneficial effects:

[0021] The concrete mixture water-cement ratio rapid testing device can quickly measure the water-cement ratio of the concrete mixture, is convenient to clean, does not need to evaporate the moisture of the mixture, and further improves the testing efficiency and the accuracy of the testing result. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 , the front view structural schematic diagram of one embodiment of the new type;

[0023] Figure 2 , the front view structural schematic diagram of a further embodiment of the new type;

[0024] Figure 3 , the plan view structural schematic diagram of the crossbeam and the sampling container in cooperation Figure 1 ;

[0025] Figure 4 , the plan view structural schematic diagram of the crossbeam and the sampling container in cooperation Figure 2 ;

[0026] 1, workbench; 2, U-shaped support; 3, linear guide rail; 4, mounting plate; 5, lead screw; 6, drive motor; 7, moving seat; 8, electric cylinder; 9, tension sensor; 10, container connecting frame; 11, container body; 12, conical hopper; 13, discharge pipe; 14, electromagnetic flow valve; 15, storage rack; 16, concrete mixture container of direct-reading concrete air content tester; 17, cleaning container; 18, sewage discharge pipe; 19, sewage collection tank; 20, display screen; 21, input module; 22, cross beam; 221, rectangular hole; 222, U-shaped supporting plate; 23, high-pressure water inlet pipe; 24, electromagnetic valve; 25, flexible connecting pipe; 26, water inlet pipe; 27, high-pressure water nozzle; 28, lap plate. DETAILED DESCRIPTION

[0027] The following describes the embodiments of the present application in a step-by-step manner. The description is only a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modification, equivalent replacement, and improvement made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

[0028] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, and a particular orientation configuration and operation, and therefore cannot be understood as a limitation on the present application.

[0029] The following embodiments can be understood as part of the technical structure and principles of the present application, and can also be understood as a combination of multiple embodiments to explain the larger range of structure and principles of the present application.

[0030] Embodiment 1

[0031] A rapid testing device for water-cement ratio of concrete mixture, as shown in Figures 1-4 , comprising a workbench 1, a support, a sampling container, a concrete air content tester, and a control mechanism, the top end of the workbench 1 is connected with a support, the support is installed with a sampling container, the sampling container is configured with a weighing mechanism, the top of the workbench 1 where the sampling container is located is provided with a concrete air content tester, the weighing mechanism and the control mechanism are connected by wire signal, and the control mechanism is configured with a calculation module, a storage module, an input module 21 and a display screen 20.

[0032] Embodiment 2

[0033] As shown in Figure 1 , 2As shown, the top end of the workbench 1 is provided with an inverted U-shaped support 2, the lower surface of the top end of the U-shaped support 2 is connected with a sampling container through a linear drive mechanism, and the inner wall of the sampling container is provided with a scale line for identifying the volume of the concrete mixture (a commonly used structure, not shown in the figure).

[0034] As shown in Figure 1 , 2 , the top of the side wall of the sampling container is connected with a C-shaped container connecting frame 10, the top end of the container connecting frame 10 is fixedly connected with a weighing mechanism, the weighing mechanism is a tension sensor 9, and the top end of the container connecting frame 10 is connected with the linear drive mechanism through the tension sensor 9.

[0035] As shown in Figure 1 , 2 , the linear drive mechanism comprises a linear guide rail 3, the top end of the linear guide rail 3 is fixedly connected with one side of the lower surface of the top end of the U-shaped support 2, the two ends of the linear guide rail 3 are respectively provided with mounting plates 4 fixedly connected with the lower surface of the top end of the U-shaped support 2, a lead screw 5 is rotatably connected between the two mounting plates 4, a moving seat 7 is screwed on the lead screw 5, the top end of the moving seat 7 is slidably connected with the linear guide rail 3, the bottom end of the moving seat 7 is connected with the tension sensor 9 through a longitudinally arranged electric cylinder 8, the outer surface of the mounting plate 4 is provided with a driving motor 6, the output shaft of the driving motor 6 is connected with one end of the lead screw 5 and used to drive the lead screw 5 to rotate, and the driving motor 6 and the electric cylinder 8 are respectively electrically connected with a control mechanism through wires.

[0036] Example 3

[0037] As shown in Figure 1 , 2 , the driving motor 6 is a servo motor, and the concrete air content measuring instrument is a direct-reading concrete air content measuring instrument.

[0038] As shown in Figure 1 , 2 , a plurality of concrete mixture containers 16 of the direct-reading concrete air content measuring instrument are arranged side by side on the workbench 1 at a position opposite to one side of the lead screw 5, and a storage rack 15 is further arranged on one side of the workbench 1, and the storage rack 15 is used to hold other components of the direct-reading concrete air content measuring instrument except the concrete mixture container.

[0039] Example 4

[0040] As shown in Figures 2-4 , the two arms of the U-shaped support 2 are further fixedly connected with a cross beam 22 in the transverse direction, the cross beam 22 is provided with a rectangular hole 221 in the inside, and the outer wall of the sampling container is separated from the inner edge of the rectangular hole 221 to avoid affecting the weighing.

[0041] As Figures 1-4 shown, the rectangular hole 221 away from the inner edge of the side of the shelf 15 is also integrally connected with U-shaped plate 222, the front and rear end of the sampling container is respectively fixedly connected with the lap plate 28, the lap plate 28 is used in cooperation with the U-shaped plate 222.

[0042] Example 5

[0043] As Figure 2 shown, the concrete mixture container 16 of the direct reading type concrete air content tester is provided with a cleaning container 17 at the top end of the workbench 1 away from the side of the shelf 15, the bottom end of the cleaning container 17 is provided with a sewage pipe 18, the lower end of the sewage pipe 18 penetrates through the top of the workbench 1 and is connected with a sewage collection tank 19 arranged on the ground, and a valve is arranged on the sewage pipe 18.

[0044] As Figure 2 shown, the high-pressure water input pipe 23 penetrates through the side wall of the U-shaped support 2, the high-pressure water nozzle 27 is fixedly connected to the middle of the bottom end of the container connecting frame 10, the water inlet pipe 26 of the high-pressure water nozzle 27 penetrates through the side wall of the container connecting frame 10 and is connected with the end of the high-pressure water input pipe 23 through the flexible connecting pipe 25, the solenoid valve 24 is arranged on the high-pressure water input pipe 23, and the solenoid valve 24 is electrically connected with the control mechanism through wires.

[0045] Example 6

[0046] As Figure 1 , 2 shown, the sampling container comprises a container body 11, the bottom end of the container body 11 is integrally connected with a conical hopper 12, the bottom end of the conical hopper 12 is integrally connected with a discharge pipe 13, the discharge pipe is provided with an electromagnetic flow valve 14, and the electromagnetic flow valve 14 is electrically connected with the control mechanism through wires.

[0047] The working principle of the present application is as follows:

[0048] 1. Mechanical principle:

[0049] (1) The linear drive mechanism drives the moving seat to move back and forth through the driving motor, and a quantitative amount of concrete mixture is added to the inside of each concrete mixture container 16 of the direct reading type concrete air content tester by controlling the opening and closing of the electromagnetic flow valve. The operation process can be automated or manually assisted. When the electric cylinder is extended and retracted, the discharge pipe can move downward to avoid splashing of the concrete mixture to the outside of the concrete mixture container 16 of the direct reading type concrete air content tester.

[0050] (2) the direct reading type concrete air content measuring instrument's concrete mixture container 16 adds the quantitative concrete mixture, the staff can take down the other components of the direct reading type concrete air content measuring instrument from the shelf, and the direct reading type concrete air content measuring instrument's concrete mixture container 16 is assembled to measure the air content of the concrete mixture, the present new type is provided with multiple direct reading type concrete air content measuring instruments, and the average value can be obtained by multiple measurements to represent the air content of the concrete mixture.

[0051] (3) while the staff is measuring the air content, the control mechanism moves the sampling container above the cleaning container 17, opens the electromagnetic valve, flushes the inner wall of the cleaning container 17 through the high-pressure water jet, and then opens the valve to discharge the sewage into the sewage collection tank 19 through the sewage discharge pipe.

[0052] (4) in order to avoid the long-term tension of the sampling container on the electric cylinder, the lap plate is lapped on the top of the U-shaped supporting plate 222 when not in use, so as to avoid damaging the electric cylinder and other electrical components.

[0053] 2. Calculation principle:

[0054] According to the volume method in the "Ordinary Concrete Mix Proportion Design Regulations" (JGJ 55), the relationship between the apparent density of the concrete mixture and the air content is shown in formula (A.1):

[0055] (A.1)

[0056] In the formula: ρ——the apparent density of the concrete mixture, unit: kilogram per cubic meter (kg / m 3 );

[0057] ρ B ——the density of the cementitious material, unit: kilogram per cubic meter (kg / m 3 );

[0058] ρ W ——the density of water, unit: kilogram per cubic meter (kg / m 3 );

[0059] ρ S ——the saturated surface dry density of fine aggregate, unit: kilogram per cubic meter (kg / m 3 );

[0060] ρ G ——the saturated surface dry density of coarse aggregate, unit: kilogram per cubic meter (kg / m 3 );

[0061] m B ——the amount of cementitious material per cubic meter of concrete, unit: kilogram (kg);

[0062] m W — water consumption per cubic meter of concrete, in kilograms (kg);

[0063] m S — fine aggregate (saturated surface dry) consumption per cubic meter of concrete, in kilograms (kg);

[0064] m G — coarse aggregate (saturated surface dry) consumption per cubic meter of concrete, in kilograms (kg);

[0065] A — air content of the concrete mixture, expressed in percentage (%).

[0066] As can be seen from equation (A.1), when the consumption of each raw material of the concrete remains unchanged, the above equation can be simplified to equation (A.2):

[0067] (A.2)

[0068] where y represents the apparent density of the concrete mixture, and x represents the air content. Obviously, the apparent density of the concrete mixture and the air content are in a linear relationship, that is, the coordinate points corresponding to the apparent density (ordinate) and the air content (abscissa) of the concrete mixture always lie on a straight line. When the actual water consumption of the concrete changes, the measured coordinate points will deviate from the straight line. According to the change value of the apparent density of the mixture on the straight line and the apparent density corresponding to the same air content, the actual water consumption of the concrete can be calculated.

[0069] Specifically, the control mechanism of the present application calculates the weight of the concrete mixture in the sampling container through the data of the tension sensor, and then calculates the apparent density of the concrete mixture according to the pre-set sampling volume. Then, the measurement values of the air content of the concrete mixture are obtained by manual measurement, and the measurement values are input into the control mechanism. The control mechanism takes the average value through the pre-set program of the calculation module, and calculates the water content of the concrete mixture according to equation (A.1) and the related parameters of equation (A.1) stored in the storage module in advance, and then calculates the water-binder ratio according to the water content data.

[0070] In the control mechanism of the present application, the calculation module is used to realize the steps of calculating the water-binder ratio, and the storage module is used to store the related data required for calculating the water-binder ratio, such as the net weight of the sampling container, the pre-set sampling volume, the sampling amount when the air content is determined, and the parameter values in equation (A.1). The calculation module and the storage module are signal connected, the display screen is used to display the calculation result, and the input module is used to input the above data.

[0071] It should be noted that, in the present application, the water-binder ratio is calculated by measuring the air content of the concrete mixture, and the water-binder ratio is calculated according to the water content of the concrete mixture. Figure 2In the shown embodiment, before the quantitative concrete mixture is added to the concrete mixture container 16 of the direct-reading concrete air content tester, the flexible connecting pipe is not connected to the water inlet pipe to avoid interference with the data of the tension sensor. The water inlet pipe should be closed with a threaded cap. After the quantitative concrete mixture is added to the concrete mixture container 16 of the direct-reading concrete air content tester, the threaded cap is opened and connected to the flexible connecting pipe.

Claims

1. A device for rapid testing of the water to cementitious ratio of a concrete mix, characterised in that: The workbench top is provided with an inverted U-shaped support, the lower surface of the top end of the U-shaped support is connected with a sampling container through a linear driving mechanism, and a scale line for marking the volume of the concrete mixture is arranged on the inner wall of the sampling container.

2. A device for rapid testing of the water to binder ratio of a concrete mix according to claim 1, characterised in that: The sampling container side wall top is connected with a C-shaped container connecting frame, the top end of the container connecting frame is fixedly connected with a weighing mechanism, the weighing mechanism is a tension sensor, and the top end of the container connecting frame is connected with the linear driving mechanism through the tension sensor.

3. A rapid test device for determining the water to cementitious ratio of a concrete mix according to claim 2, characterised in that: The linear driving mechanism includes a linear guide rail, the top end of the linear guide rail is fixedly connected with one side of the lower surface of the top end of the U-shaped support, both ends of the linear guide rail are respectively provided with mounting plates fixedly connected with the lower surface of the top end of the U-shaped support, a lead screw is rotatably connected between the two mounting plates, a moving seat is screwed on the lead screw, the top end of the moving seat is slidably connected with the linear guide rail, the bottom end of the moving seat is connected with the tension sensor through a longitudinally arranged electric cylinder, the outer surface of the mounting plate is provided with a driving motor, the output shaft of the driving motor is connected with one end of the lead screw and used to drive the lead screw to rotate, and the driving motor and the electric cylinder are respectively electrically connected with the control mechanism through wires.

4. A device for rapid testing of the water to binder ratio of a concrete mix as claimed in claim 3, characterised in that: The driving motor is a servo motor, and the concrete air content measuring instrument is a direct-reading concrete air content measuring instrument.

5. A rapid test device for determining the water to cementitious ratio of a concrete mix according to claim 4, characterised in that: A plurality of concrete mixture containers of the direct-reading concrete air content measuring instrument are arranged side by side on the workbench upper surface opposite to one side of the lead screw, and a storage rack is further arranged on one side of the workbench.

6. A rapid test device for determining the water to cementitious ratio of a concrete mix according to claim 5, characterised in that: The two arms of the U-shaped support are further fixedly connected with a cross beam in the transverse direction, the cross beam is provided with a rectangular hole, and the outer wall of the sampling container is separated from the inner edge of the rectangular hole.

7. A rapid test device for determining the water to cementitious ratio of a concrete mix according to claim 6, characterised in that: The inner edge of the side of the rectangular hole away from the storage rack is further integrally connected with a U-shaped supporting plate, the front end and the rear end of the sampling container are respectively fixedly connected with overlapping plates, and the overlapping plates are used in cooperation with the U-shaped supporting plate.

8. A rapid test device for determining the water to cementitious ratio of a concrete mix according to claim 7, characterised in that: The top end of the workbench on the side of the concrete mixture container of the direct-reading concrete air content measuring instrument away from the storage rack is further provided with a cleaning container, the bottom end of the cleaning container is provided with a sewage discharge pipe, the lower end of the sewage discharge pipe penetrates through the top of the workbench and is connected with a sewage collection tank arranged on the ground, and a valve is arranged on the sewage discharge pipe.

9. A rapid test device for determining the water to cementitious ratio of a concrete mix according to claim 8, characterised in that: ​ 10. A rapid test device for determining the water to cementitious ratio of a concrete mix according to claim 9, characterised in that: The side wall of the U-shaped support is penetrated by a high-pressure water input pipe, the bottom end of the container connecting frame is fixedly connected with a high-pressure water nozzle, the water inlet pipe of the high-pressure water nozzle penetrates the side wall of the container connecting frame and is connected with the end of the high-pressure water input pipe through a flexible connecting pipe, and an electromagnetic valve is installed on the high-pressure water input pipe and electrically connected with the control mechanism through wires.

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