Concrete gas content measuring device

Abstract

The utility model relates to the technical field of construction detection equipment, and discloses a concrete air content measuring device which comprises a bowl body, a water injection device, an air inflation device and a numerical control device. An air port of the air inflation device is connected with the bowl body and communicated to the interior of the bowl body, and the numerical control device is arranged on the bowl body and electrically connected with the water injection device and the air inflation device; according to the utility model, the water injection device and the air inflation device are arranged to automatically inject water into the measuring device and automatically inflate the measuring device during a test, so that human resources are optimized; meanwhile, the bowl bodies are connected through the electromagnetic adsorption device, and the bowl bodies and the electromagnetic adsorption device can be tightly adsorbed together after being electrified so as to prevent the gas content tester from leaking water or gas in the test process. And after the test is finished, the electromagnet loses magnetism to separate the two.

Description

Technical Field

[0001] This utility model relates to the field of construction testing equipment technology, specifically to a device for measuring the air content of concrete. Background Technology

[0002] Concrete is not only a mixture of various substances, but it also contains three states: gas, liquid, and solid. The amount of gaseous content is called its air content. Especially in the field of hydraulic concrete, the air content of concrete has a significant impact on its durability. Hydraulic concrete structures are periodically subjected to environmental water, and in frigid regions, the frost resistance of the structure is strictly controlled. The air content in concrete is a key factor directly affecting frost resistance, so the detection of air content is of great concern. The principle of the concrete air content meter is based on the gas equation. When the pressure in the air chamber and the container filled with the sample reaches equilibrium, the amount of pressure reduction in the air chamber is the percentage of air content in the concrete, which is displayed on the pressure gauge as the air content in the sample.

[0003] Existing concrete air content analyzers are based on Boyle's law for gases. They introduce air with a certain initial pressure and volume into a measuring vessel containing fresh concrete. When the pressure reaches equilibrium, the air content of the fresh concrete is determined by the pressure change. The analyzer consists of two parts: a measuring vessel and a top cover. The air chamber is located on top of the cover. Water, which fills the surface of the concrete, is injected through a water inlet and outlet valve, and the air in the measuring vessel is expelled through a drain and air outlet valve. Before testing, all valves are closed. Pressurized air from the air chamber enters the concrete measuring vessel. When the pressure reaches equilibrium, the air content of the fresh concrete being measured is indicated on the air content meter.

[0004] Defects and shortcomings of existing technology:

[0005] 1. The procedure for determining the air content of concrete is relatively complex. First, water must be injected into the measuring device through the inlet valve. Once a stable flow of water emerges from the vent valve, both the inlet and vent valves must be closed simultaneously. Then, air is pumped into the air chamber through the air inlet valve. This process sometimes requires two people to operate simultaneously, and it is complex and wastes human resources.

[0006] 2. The airtightness of the concrete air content measuring device is insufficient. The existing device only has 4-5 bolts to fix the measuring bowl and measuring cylinder. This results in too many factors affecting the airtightness of the device, such as insufficient tightening of bolts by hand or failure to tighten bolts diagonally, which will lead to errors in the sample.

[0007] 3. After the air content test of concrete is completed, the concrete inside can be reused to test its compressive strength, impermeability, etc. However, water needs to be injected into the measuring device during the air content test, which results in some water remaining on the surface of the concrete. The surface water can only be poured out manually after the test, which has a great impact on the water-cement ratio of the concrete and may even affect its compressive strength, etc.

[0008] 4. During the experiment, when the measuring device is full of water, it will flow out from the drain and vent valve. This not only wastes water resources, but the muddy water it carries out will also pollute the experimental environment and instruments, affecting environmental cleanliness. Utility Model Content

[0009] In order to solve the above problems, the present invention aims to provide a concrete air content measuring device, which simplifies the concrete air content measuring steps, reduces the measurement error, and optimizes the experimental human resources.

[0010] This utility model is achieved through the following technical solution:

[0011] A concrete air content measuring device includes: a bowl, a water injection device, an air filling device, and a CNC device. The water inlet of the water injection device is connected to the bowl and communicates with the interior of the bowl. The air inlet of the air filling device is connected to the bowl and communicates with the interior of the bowl. The CNC device is disposed on the bowl and is electrically connected to the water injection device and the air filling device.

[0012] The bowl body includes: a measuring bowl, a bowl lid, and an electromagnetic adsorption device. The electromagnetic adsorption device is fixedly connected to the measuring bowl and / or the bowl lid, and is electrically connected to the CNC device. When energized, the measuring bowl and the bowl lid are electromagnetically adsorbed and sealed together. When de-energized, the measuring bowl separates from the bowl body.

[0013] The concrete to be tested is placed in the measuring bowl.

[0014] Specifically, the water injection device includes: a first water pump, a water tank, and an inlet valve. The inlet valve is fixedly installed on the bowl cover. The inlet of the first water pump is connected to the water tank through a water inlet pipe. The outlet of the first water pump is connected to the inlet valve through a water inlet pipe. The first water pump is electrically connected to the CNC device.

[0015] Specifically, the inflation device includes an air pump and an air valve. The air valve is fixedly installed on the bowl cover. The air outlet of the air pump is connected to the air valve through an air pipe. The air pump is electrically connected to the CNC device.

[0016] Optionally, a partition is provided inside the water tank, and the air pump is located inside the water tank, with the partition separating the water bodies.

[0017] Specifically, the numerical control device includes: a pressure digital display, a pressure sensor, and a control module. The pressure sensor is disposed inside the bowl, and the signal terminal of the pressure sensor is electrically connected to the pressure digital display.

[0018] Furthermore, the device also includes a resource recycling device, which includes a second water pump and a drain and vent valve. The inlet of the second water pump is connected to the inlet valve through a water inlet pipe, and the outlet of the second water pump is connected to the water tank through a water inlet pipe. The second water pump is electrically connected to the CNC device. The drain and vent valve is installed on the bowl cover and is connected to the water tank through a drain pipe.

[0019] Specifically, the first water pump and the second water pump are connected in parallel, and the outlet of the first water pump and the inlet of the second water pump are connected to the inlet valve through a three-way pipe. The inlet of the first water pump and the outlet of the second water pump are connected to the water tank through a three-way pipe.

[0020] Optionally, the resource recycling device may also include a filter screen installed inside the water tank.

[0021] Optionally, the bowl cover is also provided with a balance valve and a fine-tuning valve.

[0022] Optionally, the electromagnetic adsorption device is an annular electromagnet disposed on the edge of the measuring bowl lid, and the measuring bowl is made of ferromagnetic material.

[0023] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0024] This invention optimizes human resources by automatically injecting water and inflating air into the measuring device during testing. Simultaneously, the bowl is connected via an electromagnetic adsorption device, ensuring a tight bond between the two components after power is applied, preventing water or air leakage from the gas content measuring instrument during the test. After the test, the power is disconnected, causing the electromagnet to lose its magnetism and separating the components. This not only increases the airtightness of the testing instrument but also simplifies the process and replaces manual operation.

[0025] This invention incorporates a resource recycling device. When the measuring bowl is full during water injection, the water flows out through the drain and vent valve and into the water tank via the water inlet pipe. After the test, the water on the concrete surface is sucked into the water tank, and the water on the concrete surface is completely absorbed without affecting the water-cement ratio.

[0026] Finally, this utility model has the effect of integrated digital intelligent control; by electrically connecting the air pump, water pump, pressure digital display, digital display screen, and electromagnetic adsorption device to the control module, the opening and closing of the equipment is controlled by the controller during the test, and the inflation is automatically stopped by the pressure sensor and the control module. Attached Figure Description

[0027] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention, and are included in and constitute a part of this specification, but do not constitute a limitation on the embodiments of the present invention.

[0028] Figure 1 This is a front view of a concrete air content measuring device according to the present invention.

[0029] Figure 2 This is a top view of a concrete air content measuring device according to the present invention.

[0030] Figure 3 This is a structural schematic diagram of the water tank according to the present invention.

[0031] Figure 4 This is a circuit block diagram of a concrete air content measuring device according to the present invention.

[0032] Figure reference numerals: 1-Measuring bowl; 11-Electromagnetic adsorption device; 2-Bowl cover; 21-Balancing valve; 22-Fine-adjusting valve; 23-Digital pressure display; 24-Drain and exhaust valve; 25-Air inlet valve; 26-Water inlet valve; 27-Pressure sensor; 3-Water tank; 31-Filter screen; 32-Control module; 33-Baffle plate; 34-Air pump; 35-Drain pipe; 36-Air inlet pipe; 4-Water inlet pipe; 41-First water pump; 42-Second water pump. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this utility model.

[0034] It should also be noted that, for ease of description, only the parts relevant to this utility model are shown in the accompanying drawings.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] Where there is no conflict, the embodiments and features described herein can be combined with each other. The following will refer to the appendix. Figure 1 , Figure 2 , Figure 3 and Figure 4 The present invention will be described in detail with reference to its implementation methods.

[0038] Example 1

[0039] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a concrete air content measuring device is provided, including: a bowl, a water injection device, an air filling device, and a CNC device. The water inlet of the water injection device is connected to the bowl and communicates with the interior of the bowl. The air inlet of the air filling device is connected to the bowl and communicates with the interior of the bowl. The CNC device is mounted on the bowl and is electrically connected to the water injection device and the air filling device.

[0040] The function of the water injection device is to inject water into the measuring bowl 1 to remove excess air before concrete measurement and ensure a water-sealed measurement environment. The water inlet of the water injection device is connected to the measuring bowl 1 via a pipe, and water flows into the bowl through the inlet. The water injection device is electrically connected to a CNC device, which controls the opening and closing of the water injection operation.

[0041] The inflation device is used to inflate the inside of the measuring vessel 1 to detect the air content of the concrete. Gas is delivered into the measuring vessel 1, with the air inlet connected to the inside of the vessel to ensure air enters the concrete sample. The inflation device is connected to a CNC device, which precisely adjusts the amount of gas injected.

[0042] First, water is injected into the measuring bowl 1 through the water injection device, with the water inlet connected to the bowl body, thus sealing the concrete inside the measuring bowl 1 with water and expelling excess air from the concrete. Then, the air inflation device inflates the measuring bowl 1 through the air inlet, with the air pump 34 generating a certain air pressure, allowing the gas to enter the concrete sample. At this time, the pressure sensor 27 detects the change in air pressure inside the bowl and transmits it to the numerical control device to display the air pressure value.

[0043] The measuring vessel includes: a measuring vessel 1, a lid 2, and an electromagnetic adsorption device 11. The electromagnetic adsorption device 11 is fixedly connected to the measuring vessel 1 and / or the lid 2, and is electrically connected to a CNC device. When energized, the measuring vessel 1 and the lid 2 are electromagnetically adsorbed and sealed together. When de-energized, the measuring vessel 1 separates from the measuring vessel. The concrete to be tested is placed inside the measuring vessel 1. The electromagnetic adsorption device 11 is a ring-shaped electromagnet located on the edge of the lid 2, and the measuring vessel 1 is made of ferromagnetic material.

[0044] The measuring bowl 1 is a container used to hold the concrete to be tested. It is usually made of metal to ensure sufficient strength and durability. The bowl lid 2 covers the top of the measuring bowl 1 to seal it and ensure the stability of the internal environment during measurement.

[0045] To increase airtightness and reduce experimental errors, an electromagnetic adsorption device 11 is added to the edge of the measuring vessel lid 2, and the top edge of the measuring vessel 1 is also made of iron. When powered on, the electromagnetic adsorption device 11 firmly adheres the lid 2 to the measuring vessel 1 using electromagnetic attraction, ensuring a tight seal. When the power is off, the electromagnetic adsorption device 11 loses its magnetic force, and the lid 2 can be separated from the measuring vessel 1. This not only increases the airtightness of the experimental instrument but also simplifies the process and replaces manual operation.

[0046] Example 2

[0047] The water injection device includes: a first water pump 41, a water tank 3, and an inlet valve 26. The inlet valve 26 is fixedly installed on the bowl cover 2. The inlet of the first water pump 41 is connected to the water tank 3 through a water inlet pipe 4. The outlet of the first water pump 41 is connected to the inlet valve 26 through a water inlet pipe 4. The first water pump 41 is electrically connected to the CNC device.

[0048] The function of the first water pump 41 is to transport water from the water tank 3 to the bowl. The water pump is connected to the water tank 3 through the water inlet pipe 4, and the water is circulated and injected using an electric water pump. The water inlet valve 26 is fixedly installed on the bowl cover 2. The first water pump 41 is electrically connected to a CNC device, which can automatically control the start and stop of the water pump according to the set operation instructions, thereby realizing the automation of the water injection operation.

[0049] The inflation device includes an air pump 34 and an air valve. The air valve is fixedly mounted on the bowl cover 2. The air outlet of the air pump 34 is connected to the air valve via an air pipe. The air pump 34 is electrically connected to a CNC device. The air pump 34 is used to pressurize gas into the bowl. Similar to the water injection device, the air pump 34 is also electrically connected to the CNC device, which controls the operation of the air pump 34, allowing the inflation process to be performed automatically as needed.

[0050] A partition 33 is installed inside the water tank 3, and the air pump 34 is located inside the water tank 3, separated from the water by the partition 33. The partition 33 isolates the air pump 34 from the water in the water tank 3, preventing direct contact between the air pump 34 and the water. At the same time, the air pump 34 is located behind the partition 33 inside the water tank 3. This layout helps to save space and improve the compactness of the device, while also allowing the water pump and air pump 34 to share a water tank 3, simplifying the overall structure.

[0051] like Figure 4 As shown, the CNC device includes: a pressure digital display 23, a pressure sensor 27, and a control module 32. The pressure sensor 27 is located inside the pressure vessel, and its signal terminal is electrically connected to the pressure digital display 23. The control module 32 is the core of the CNC device, responsible for coordinating the work of various parts, including water injection, air inflation, and data processing. By receiving the signal from the pressure sensor 27, the control module 32 can automatically adjust the operation of the air pump 34 and the water pump to ensure the accuracy and stability of the system during measurement.

[0052] Example 3

[0053] To recycle used water after measuring the air content of concrete, thus avoiding water waste and reducing environmental pollution, the device also includes a resource recycling unit. This unit comprises a second water pump 42 and a drain and vent valve 24. The inlet of the second water pump 42 is connected to an inlet valve 26 via a water inlet pipe 4, and the outlet of the second water pump 42 is connected to a water tank 3 via the same pipe. The second water pump 42 is electrically connected to a numerical control device. The drain and vent valve 24 is mounted on the bowl cover 2 and is connected to the water tank 3 via a drain pipe 35. The second water pump 42 is also electrically connected to the numerical control device, which automatically drains and recycles residual water from the concrete surface after measurement by controlling the operation of the second water pump 42, reducing manual operation.

[0054] The resource recycling device also includes a filter screen 31 installed inside the water tank 3.

[0055] By adding a drain pipe 35 to the drain and vent valve 24, the water injected from the inlet valve 26 during the test will flow out through the drain and vent valve 24 after the measuring bowl 1 is full, and then flow into the water tank 3 through the drain pipe 35, thus achieving the effect of water resource recycling and environmental protection.

[0056] By adding a second water pump 42 to the inlet valve 26, the second water pump 42 is turned on at the end of the test. The water on the surface of the concrete in the measuring vessel comes into contact with the internal pipe of the inlet valve 26, and the water on the concrete surface is sucked into the water tank 3 through the pipe. After the test, the water on the concrete surface is completely absorbed and does not affect the water-cement ratio, so it can be used for subsequent tests.

[0057] The first water pump 41 and the second water pump 42 are connected in parallel. The outlet of the first water pump 41 and the inlet of the second water pump 42 are connected to the inlet valve 26 via a three-way pipe. The inlet of the first water pump 41 and the outlet of the second water pump 42 are connected to the water tank 3 via a three-way pipe. Figure 1 As shown, the branch structure of the selected water pipe 4 is distributed in a diamond shape, which facilitates the installation of two water pumps.

[0058] The bowl lid 2 is also equipped with a balance valve 21 and a fine-tuning valve 22. The balance valve 21 is used to maintain the pressure balance inside and outside the bowl, especially during gas filling or water injection, to prevent sudden pressure changes from affecting the accuracy of the measurement. The fine-tuning valve 22 is used to precisely adjust minute changes in air pressure or water flow to ensure precise control during the experiment.

[0059] Finally, the water inlet pipe 4 is bolted to the water inlet valve 26. The water inlet pipe 4 is also bolted to the first water pump 41 and the second water pump 42, and to the water tank 3. The air pump 34 is bolted to the air inlet valve 25. These connections can be made via bolts when maintenance or partial cleaning is required after the test.

[0060] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0062] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications can be made based on the above-described invention, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A device for measuring the air content of concrete, characterized in that, include: The container includes a bowl, a water injection device, an air inflation device, and a numerical control device. The water inlet of the water injection device is connected to and communicates with the interior of the bowl. The air inlet of the air inflation device is connected to and communicates with the interior of the bowl. The numerical control device is mounted on the bowl and is electrically connected to the water injection device and the air inflation device. The bowl body includes: a measuring bowl (1), a bowl lid (2), and an electromagnetic adsorption device (11). The electromagnetic adsorption device (11) is fixedly connected to the measuring bowl (1) and / or the bowl lid (2), and the electromagnetic adsorption device (11) is electrically connected to the CNC device. When the power is on, the measuring bowl (1) and the bowl lid (2) are electromagnetically adsorbed and sealed. When the power is off, the measuring bowl (1) is separated from the bowl body. The concrete to be tested is placed in the measuring bowl (1).

2. The concrete air content measuring device according to claim 1, characterized in that, The water injection device includes: a first water pump (41), a water tank (3) and an inlet valve (26). The inlet valve (26) is fixedly installed on the bowl cover (2). The inlet of the first water pump (41) is connected to the water tank (3) through a water pipe (4). The outlet of the first water pump (41) is connected to the inlet valve (26) through a water pipe (4). The first water pump (41) is electrically connected to the CNC device.

3. The concrete air content measuring device according to claim 2, characterized in that, The inflation device includes an air pump (34) and an air valve. The air valve is fixedly installed on the bowl cover (2). The air outlet of the air pump (34) is connected to the air valve through an air pipe. The air pump (34) is electrically connected to the CNC device.

4. The concrete air content measuring device according to claim 3, characterized in that, The water tank (3) is equipped with a partition (33), and the air pump (34) is installed inside the water tank (3), and the water body is separated by the partition (33).

5. The concrete air content measuring device according to claim 3, characterized in that, The numerical control device includes: a pressure digital display (23), a pressure sensor (27), and a control module (32). The pressure sensor (27) is disposed inside the bowl, and the signal terminal of the pressure sensor (27) is electrically connected to the pressure digital display (23).

6. The concrete air content measuring device according to claim 2, characterized in that, It also includes a resource recycling device, which includes a second water pump (42) and a drain and vent valve (24). The inlet of the second water pump (42) is connected to the inlet valve (26) through a water inlet pipe (4), and the outlet of the second water pump (42) is connected to the water tank (3) through a water inlet pipe (4). The second water pump (42) is electrically connected to the CNC device. The drain and vent valve (24) is installed on the bowl cover (2) and is connected to the water tank (3) through a drain pipe (35).

7. The concrete air content measuring device according to claim 6, characterized in that, The first water pump (41) and the second water pump (42) are connected in parallel. The outlet of the first water pump (41) and the inlet of the second water pump (42) are connected to the inlet valve (26) through a three-way pipe. The inlet of the first water pump (41) and the outlet of the second water pump (42) are connected to the water tank (3) through a three-way pipe.

8. The concrete air content measuring device according to claim 7, characterized in that, The resource recycling device also includes a filter screen (31) installed inside the water tank (3).

9. The concrete air content measuring device according to claim 7, characterized in that, The bowl cover (2) is also equipped with a balance valve (21) and a fine-tuning valve (22).

10. The concrete air content measuring device according to claim 1, characterized in that, The electromagnetic adsorption device (11) is an annular electromagnet located on the edge of the bowl cover (2), and the measuring bowl (1) is made of ferromagnetic material.

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