Hydraulic engineering building material penetration detection equipment and detection method thereof

Abstract

The application belongs to the field of water conservancy engineering quality detection, and particularly relates to a water conservancy engineering building material permeation detection device and a detection method thereof, which comprises a metal cylinder, a measuring cup, a cylinder cover threadedly connected with the upper end of the metal cylinder, a file ring installed in the metal cylinder, a water seepage and drainage pipe arranged at the bottom of the metal cylinder, a vertical pipe installed in the center of the cylinder cover, a water valve installed in the middle of the vertical pipe, and a superimposed high-frequency vibration group arranged at the upper end of the cylinder cover and used for applying high-frequency vibration to the liquid medium filled in the metal cylinder. The water conservancy engineering building material permeation detection device and the detection method thereof can quickly detect the permeability of water conservancy engineering building materials, do not need a large-sized pressure stabilizing device, are easy to carry, and are suitable for field temporary detection. The water conservancy engineering building material permeation detection device can be used to detect whether water seeps and can also be used to detect the penetration depth, and has a wide range of uses.

Description

Technical Field

[0001] This invention belongs to the field of water conservancy engineering quality testing technology, specifically relating to a water conservancy engineering building material permeability testing equipment and its testing method. Background Technology

[0002] In the field of water conservancy project quality testing, the impermeability of concrete is a very important indicator.

[0003] The following methods currently exist for testing the permeability of concrete:

[0004] 1. Stepwise pressure method: The water permeability resistance of concrete is determined by applying water pressure in stages, and the result is expressed as a water permeability grade.

[0005] 2. Steady Flow Method: This method measures the flow rate and velocity of pressurized liquid flowing through concrete and is suitable for high-permeability concrete.

[0006] 3. Penetration depth method: The penetration depth of water in concrete is measured after a single pressurization.

[0007] Both the step-by-step pressurization method and the depth-of-penetration method require the application of a certain water pressure, which is typically achieved using pressure stabilizing equipment: such as pressure pumps and pressure tanks, to maintain stable water pressure in the system. However, these pressure stabilizing devices are not only bulky and difficult to carry, but also unsuitable for temporary field testing.

[0008] Based on this, the present invention is proposed. Summary of the Invention

[0009] The purpose of this invention is to provide a water conservancy engineering building material permeability testing device and testing method to solve the above-mentioned problems.

[0010] A permeability testing device for water conservancy engineering building materials includes a metal cylinder and a measuring cup. A retaining ring is installed inside the metal cylinder, and a seepage drainage pipe is provided at the bottom of the metal cylinder. It also includes a cylinder cover threaded to the upper end of the metal cylinder. A vertical pipe is installed in the center of the cylinder cover, and a water valve is installed in the middle of the vertical pipe. The lower end of the vertical pipe communicates with the inner cavity of the metal cylinder. A superimposed high-frequency vibration group is provided at the upper end of the cylinder cover for applying high-frequency vibration to the liquid medium filled in the metal cylinder. The superimposed high-frequency vibration group is located below the water valve.

[0011] In a further improvement, the superimposed high-frequency vibration group includes at least three sets of circular ultrasonic transducers and one annular megaphonic transducer. The ultrasonic transducers are symmetrically arranged on the outside of the vertical pipe, and the outer periphery of all ultrasonic transducers is fixedly connected and forms an assembly hole for the vertical pipe to pass through. The megaphonic transducer is sleeved on the outside of the vertical pipe, and the megaphonic transducer is fixedly connected to the ultrasonic transducers. All ultrasonic transducers are located below the megaphonic transducers.

[0012] As a further improvement, the ultrasonic transducer is provided with three transducers.

[0013] As a further improvement, the lower part of the metal cylinder has an inverted conical structure.

[0014] In a further improvement, the outer periphery of all ultrasonic transducers is fully welded, and the mega-sonic transducers are fully welded to each other.

[0015] Further improvements were made, with the first and second ultrasonic transducers having an ultrasonic frequency of 51 kHz, and the third ultrasonic transducer having an ultrasonic frequency of 20 kHz.

[0016] A further improvement is that the megaphonic frequency of the megaphonic oscillator is 3.1 MHz.

[0017] In a further improvement, the liquid medium is water or hydrogen peroxide with a mass fraction of 3%.

[0018] In a further improvement, a sealing ring is provided between the upper end of the metal cylinder and the cylinder cover for sealing.

[0019] A method for penetrant testing of building materials in water conservancy projects includes the following steps:

[0020] Step 1: Drill holes to sample the building materials for the water conservancy project to obtain a cylindrical blank; fit at least two rubber rings around the outer perimeter of the blank to obtain a sample column;

[0021] Step 2: Open the tube cap and insert the sample column into the metal tube until the sample column touches the retaining ring. At this time, the upper end of the sample column is more than 3 cm away from the upper end of the metal tube.

[0022] Step 3: Pour liquid medium into the metal cylinder until the liquid level is flush with the top surface of the metal cylinder;

[0023] Step 4: Cover and seal the cylinder, open the water valve, and continue to pour liquid medium into the metal cylinder through the vertical pipe until the liquid level is higher than the top of the water valve; let it stand for 2-3 minutes, then close the water valve.

[0024] Step 5: Place the measuring cup under the drain pipe to collect water;

[0025] Step 6: Start the superimposed high-frequency vibration group to conduct a permeation test; observe whether liquid drips from the lower end of the seepage drain pipe into the cup.

[0026] Compared with the prior art, the beneficial effects of this invention are as follows:

[0027] 1. The water conservancy engineering building material permeability testing equipment and its testing method described in this invention can quickly test the permeability of water conservancy engineering building materials. It does not require a large-volume pressure stabilizing device, is easy to carry, and is suitable for temporary field testing.

[0028] 2. The water conservancy engineering building material permeability testing equipment can be used to detect whether there is water seepage and to detect the depth of seepage, and has a wide range of applications. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the water conservancy engineering building material penetration testing equipment described in this invention;

[0030] Figure 2 This is a schematic diagram of the arrangement of three ultrasonic transducers. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0032] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example

[0034] like Figure 1 , 2As shown, a water conservancy engineering building material permeability testing device includes a metal cylinder 10 and a measuring cup 20. A retaining ring 13 is installed inside the metal cylinder 10, and a seepage drainage pipe 14 is provided at the bottom of the metal cylinder 10. It also includes a cylinder cover 11 threadedly connected to the upper end of the metal cylinder 10. A vertical pipe 21 is installed in the center of the cylinder cover 11, and a water valve 22 is installed in the middle of the vertical pipe 21. The lower end of the vertical pipe 21 communicates with the inner cavity of the metal cylinder 10. A superimposed high-frequency vibration group is provided at the upper end of the cylinder cover 11 for applying high-frequency vibration to the liquid medium filled in the metal cylinder 10. The superimposed high-frequency vibration group is located below the water valve 22.

[0035] The superimposed high-frequency vibration group includes at least three sets of circular ultrasonic transducers 31 and one annular megaphonic transducer 32. The ultrasonic transducers 31 are symmetrically arranged on the outside of the vertical tube 21. The outer periphery of all ultrasonic transducers 31 is fixedly connected and forms an assembly hole 311 for the vertical tube 21 to pass through. The megaphonic transducer 32 is sleeved on the outside of the vertical tube 21. The megaphonic transducer 32 is fixedly connected to the ultrasonic transducers 31. All ultrasonic transducers 31 are located below the megaphonic transducer 32.

[0036] In this embodiment, three ultrasonic transducers 31 are provided.

[0037] The ultrasonic frequencies of the first and second ultrasonic transducers 31 are both 51 kHz, and the ultrasonic frequencies of the third ultrasonic transducer 31 are both 20 kHz.

[0038] The megaphonic frequency of the megaphonic oscillator 32 is 3.1 MHz.

[0039] In this example, a method similar to "gradual pressurization" is used for testing, specifically:

[0040] A method for penetrant testing of building materials in water conservancy projects includes the following steps:

[0041] Step 1: Drill holes to sample the building materials for the water conservancy project to obtain a cylindrical blank; fit at least two rubber rings around the outer perimeter of the blank to obtain a sample column;

[0042] Step 2: Open the cylinder cap 11 and insert the sample column into the metal cylinder 10 until the sample column 50 contacts the retaining ring 13. At this time, the upper end of the sample column is more than 3 cm away from the upper end of the metal cylinder 10.

[0043] Step 3: Pour liquid medium into the metal cylinder 10 until the liquid level is flush with the upper end of the metal cylinder 10;

[0044] Step 4: Cover the cylinder with the cap 11 and seal it. Open the water valve 22 and continue to pour the liquid medium into the metal cylinder 10 through the vertical pipe 21 until the liquid level is higher than the top of the water valve 22. Let it stand for 2-3 minutes and then close the water valve 22.

[0045] Step 5: Place the measuring cup 20 below the drain pipe 14 to collect water;

[0046] Step 6: Start the superimposed high-frequency vibration group to perform a permeation test; observe whether liquid drips from the lower end of the seepage drain pipe 14 into the vector cup 20.

[0047] The liquid medium is hydrogen peroxide with a mass fraction of 3%.

[0048] To facilitate the removal of the sample column 50, first open the cap 11, pour out the liquid medium inside the metal cylinder 10, and then use a round rod to push the sample column 50 out of the metal cylinder 10 through the drainage pipe 14.

[0049] In this invention, ultra-high frequency megason is used to forcibly superimpose the ultrasonic vibrations released by the three ultrasonic transducers 31, thereby maximizing the application of ultra-high frequency vibrations to the hydrogen peroxide in the metal cylinder 10. The powerful impact force generated by the cavitation effect of ultrasound can simulate high pressure load.

[0050] Hydrogen peroxide decomposes to produce oxygen under high pressure and high frequency vibration. Only when combined with ultra-strong high frequency vibration can it simulate high pressure load.

[0051] Table 1

[0052]

[0053] The existing method is a step-by-step pressurization method: at the start of the test, the water pressure is increased by 0.1 MPa every 8 hours. At the same time, any leakage is observed.

[0054] In Table 1, for the same sample, the superimposed high-frequency vibration group only needs to vibrate for 5 hours to determine its permeability resistance grade as P2; while using the existing stepwise pressurization method for calibration, the permeability resistance grade measurement is the same as in Example 1, but the required testing time is 27 hours. Other methods follow the same principle.

[0055] Therefore, for this invention, the impermeability level can be determined based on the vibration time interval of the superimposed high-frequency vibration group. For example, if seepage occurs after 6 hours of vibration in a certain test, the impermeability level can be assessed as P2.

[0056] As a control, if hydrogen peroxide is replaced with water, even after 10 hours of vibration by the superimposed high-frequency vibration group, no water seepage was observed (the impermeability grade of the sample column is P2).

[0057] In contrast, if the megason oscillator 32 is replaced with a new ultrasonic oscillator 31 with an ultrasonic frequency of 20kHz or 310kHz, the test results are found to be lower than expected, with an error rate of over 85%.

[0058] As a comparison, if the ultrasonic frequency of all three ultrasonic transducers 31 is 51kHz, all the test results are found to be too high.

[0059] As a comparison, if the ultrasonic frequencies of the three ultrasonic transducers 31 are all 20kHz, the test results are found to be too low, with an error rate of 100%. Example

[0060] To facilitate drainage, the lower part of the metal cylinder 10 has an inverted conical structure. Example

[0061] To ensure strength and transmission effect, the outer periphery of all ultrasonic transducers 31 is fully welded, and the mega-sonic transducer 32 is fully welded to the ultrasonic transducer 31. Example

[0062] To ensure airtightness, the upper end of the metal cylinder 10 is sealed to the cylinder cover 11 by a sealing ring 12. Example

[0063] In this example, a method similar to the "penetration depth method" is used for detection. Steps 1-4 are the same as in Example 1, but step 5 is different, and it is as follows:

[0064] Start the superimposed high-frequency vibration group to perform penetration testing; then take out the sample column 50, split the sample column 50, take points on the cross-section, measure the penetration depth at each point, and calculate the average value.

[0065] In this example, the liquid medium is water.

[0066] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A water conservancy engineering building material permeability testing device, comprising a metal cylinder (10) and a measuring cup (20), wherein a retaining ring (13) is installed inside the metal cylinder (10), and a seepage drainage pipe (14) is provided at the bottom of the metal cylinder (10), characterized in that: It also includes a cylinder cover (11) threaded to the upper end of the metal cylinder (10), a vertical pipe (21) is installed in the center of the cylinder cover (11), a water valve (22) is installed in the middle of the vertical pipe (21), and the lower end of the vertical pipe (21) is connected to the inner cavity of the metal cylinder (10); the upper end of the cylinder cover (11) is provided with a superimposed high-frequency vibration group for applying high-frequency vibration to the liquid medium filled in the metal cylinder (10), and the superimposed high-frequency vibration group is located below the water valve (22); The superimposed high-frequency vibration group includes three sets of circular ultrasonic transducers (31) and one annular megaphonic transducer (32). The ultrasonic transducers (31) are symmetrically arranged on the outside of the vertical tube (21). The outer periphery of all ultrasonic transducers (31) is fixedly connected and forms an assembly hole (311) for the vertical tube (21) to pass through. The megaphonic transducer (32) is sleeved on the outside of the vertical tube (21). The megaphonic transducer (32) is fixedly connected to the ultrasonic transducers (31). All ultrasonic transducers (31) are located below the megaphonic transducer (32). The ultrasonic frequencies of the first ultrasonic transducer (31) and the second ultrasonic transducer (31) are both 51 kHz, and the ultrasonic frequencies of the third ultrasonic transducer (31) are both 20 kHz. The megaphonic frequency of the megaphonic oscillator (32) is 3.1 MHz; The liquid medium is water or hydrogen peroxide with a mass fraction of 3%.

2. The water conservancy engineering building material penetration testing equipment according to claim 1, characterized in that: The lower part of the metal cylinder (10) has an inverted conical structure.

3. The water conservancy engineering building material penetration testing equipment according to claim 1, characterized in that: All ultrasonic transducers (31) are fully welded on their outer periphery, and the mega-sonic transducer (32) is fully welded to the ultrasonic transducer (31).

4. The water conservancy engineering building material penetration testing equipment according to claim 1, characterized in that: The upper end of the metal cylinder (10) is sealed to the cylinder cover (11) by a sealing ring (12).

5. A method for penetrant testing of building materials in water conservancy projects, performed using a penetrant testing device for building materials in water conservancy projects as described in any one of claims 1 to 4, characterized in that, Includes the following steps: Step 1: Drill holes to sample the building materials for the water conservancy project to obtain a cylindrical blank; fit at least two rubber rings around the outer perimeter of the blank to obtain a sample column; Step 2: Open the tube cap (11) and insert the sample column into the metal tube (10) until the sample column contacts the retaining ring (13). At this time, the upper end of the sample column is more than 3 cm away from the upper end of the metal tube (10). Step 3: Pour liquid medium into the metal cylinder (10) until the liquid level is flush with the upper surface of the metal cylinder (10); Step 4: Cover the cylinder with the cap (11) and seal it. Open the water valve (22) and continue to pour the liquid medium into the metal cylinder (10) through the vertical pipe (21) until the liquid level is higher than the top of the water valve (22). Let it stand for 2~3 minutes and then close the water valve (22). Step 5: Place the measuring cup (20) under the seepage drain pipe (14) to collect water; Step 6: Start the superimposed high-frequency vibration group to perform a permeation test; observe whether liquid drips from the lower end of the seepage drain pipe (14) into the vector cup (20).

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