Concrete impermeability testing device

Abstract

The present invention belongs to the field of concrete testing, and specifically relates to a device for testing the impermeability of concrete. The device comprises a base box, a top surface of which is provided with a plurality of testing columns arranged in a rectangular array. The testing columns are used to place a concrete ball to be tested, a cylindrical hole directly reaching the center of the concrete ball to be tested is provided at the bottom of the concrete ball to be tested, a plurality of annular, expandable sealing rings are fixedly connected to the outer sides of the testing columns, and a water tank for filling water into the tops of the plurality of testing columns is provided inside the base box. By providing the testing columns, the test mold required by traditional devices is discarded. Instead, a spherical concrete ball to be tested needs to be produced, and a cylindrical hole directly reaching the center of the concrete ball to be tested is provided at the bottom of the concrete ball to be tested. This arrangement eliminates the need for a traditional test mold structure, omits a large number of preprocessing steps, and effectively improves testing efficiency.

Description

Technical Field

[0001] The invention belongs to the field of concrete detection, in particular to a device for detecting the impermeability of concrete. Background Art

[0002] Concrete is an important building material. The quality of its performance is directly related to the safety and durability of the building structure. Therefore, it is crucial to conduct a series of property tests on concrete. The main testing items include: mechanical property testing, thermal property testing and impermeability testing.

[0003] Concrete impermeability test is mainly used to measure the concrete's ability to resist water penetration under water pressure. The test methods are mainly divided into water penetration height method and step-by-step pressure method. The step-by-step pressure method measures the concrete's anti-water penetration performance expressed in impermeability grades by applying water pressure step by step.

[0004] The traditional step-by-step pressurization method for testing the permeability of concrete requires the use of a dedicated test mold. The test mold is usually a cylindrical shape that is transparent from top to bottom. A concrete block that fits the internal space of the test mold needs to be made, and a sealing material is attached to the outside of the concrete block. A hydraulic device is used to press the concrete block into the test mold, and finally the test mold is fixed to the test device with bolts for testing. The traditional structure requires a lot of pretreatment and preparation work, resulting in a lot of time and energy spent before each test.

[0005] To this end, the present invention provides a concrete impermeability detection device. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The present invention solves the technical problem by adopting the following technical solution: a device for testing the impermeability of concrete comprises a base box, the top surface of which is provided with a plurality of testing columns arranged in a rectangular array, the testing columns being used to place concrete balls to be tested, the bottom of each concrete ball being provided with a cylindrical hole extending directly through the center of the ball, the outer sides of each testing column being fixedly connected to a plurality of annular, expandable sealing rings, and the interior of the base box being provided with a water tank for filling the tops of the plurality of testing columns with water;

[0008] By setting up the detection column, the test mold required by the traditional device is abandoned. It is only necessary to make a spherical concrete ball to be tested, and open a cylindrical hole that reaches the center of the ball at the bottom of the concrete ball to be tested. The concrete ball to be tested is put on the detection column from top to bottom, and the top of the detection column is located at the center of the concrete ball to be tested. Then, multiple sealing rings are expanded to seal the gap between the detection column and the hole of the concrete ball to be tested. After completion, water is injected into the top of the detection column from the water tank, and the top of the detection column is located at the center of the ball. As the pressure of the injected water gradually increases, the water will gradually penetrate outward through the concrete ball to be tested. Since any vertical distance from the center of the ball to the surface of the sphere is equal, when water seepage is found on the surface of the concrete ball to be tested, the detection process is terminated, and data such as water pressure and detection time are recorded to complete the process of testing the impermeability of concrete. Through this setting , there is no need to use the traditional test mold structure, a large number of pretreatment steps are omitted, and the detection efficiency is effectively improved. The traditional test mold structure and the sealing structure of the concrete are often disposable. Generally, multiple sealing pads are put on the outside of the concrete or sealing materials such as paraffin are applied to the outside of the concrete. Since they need to be used for each test, the consumption is large and the problem of loose sealing may occur. The multiple expandable sealing rings can not only be reused, but also injecting air pressure far exceeding the water pressure into the sealing ring can make it difficult for the water source in the center of the ball to pass through the sealing ring, thereby ensuring the sealing of the concrete ball to be tested and the test column. In traditional experiments, in order to ensure the reliability and accuracy of the test results, a certain amount of concrete samples is required. Multiple test molds can provide more data points, thereby reducing the influence of accidental errors. Generally, six are grouped together, and the number of test columns needs to be greater than or equal to six.

[0009] Preferably, a drainage groove is provided in the middle part of the inner side of the detection column, a water pipe is fixedly connected to the top of the water tank, and a water pump for pressurizing and discharging the internal water outward is installed inside the water tank. The water pipe has multiple vertically upward drainage ends, and the multiple drainage ends are connected to the drainage groove at the bottom of the detection column. The water pump in the water tank can pressurize the water in the water tank outward and finally transmit it to the center position of the concrete ball to be tested through the drainage groove at the bottom of the detection column.

[0010] Preferably, multiple sealing rings are arranged equidistantly from top to bottom on the outside of the detection column, the interior of the sealing ring is hollow, and the sealing ring is a double-layer structure. An air pump for filling the sealing ring with air pressure is provided inside the base box, and appropriate air pressure is injected into the sealing ring through the air pump. Multiple sealing rings are arranged equidistantly, which not only ensures the sealing between the concrete ball to be detected and the detection column, but also the double-layer structure of the sealing ring, the inner sealing ring is used for inflation, and the outer sealing ring is made of wear-resistant material and is in direct contact with the concrete ball to be detected. This arrangement not only ensures an ultra-long service life of the sealing ring, but also will not cause the internal air pressure to leak even if the inner sealing ring leaks.

[0011] Preferably, two vertical air flow grooves are provided on the outer side of the interior of the detection column, and the output end of the air pump is connected to an air pressure tube. The air pressure tube has multiple output ends that are compatible with the number of detection columns, and each output end is equipped with an electromagnetic valve. The multiple output ends of the air pressure tube are respectively connected to the air flow grooves inside each detection column. The air pump generates air pressure and outputs it outward through the air pressure tube. By opening and closing multiple electromagnetic valves, the air pressure can be controlled to fill different groups of sealing rings. The air pressure is filled into multiple sealing rings at equal pressure through the air flow grooves to control the expansion of the sealing rings.

[0012] Preferably, the outer side of the detection column is concave near the top, and a plurality of one-way valves connected to the drainage trough are installed at the concave part and the top of the detection column. The setting of the detection column allows the water discharged upward from the drainage trough to be gathered in the concave part of the detection column. In this way, as the water pressure gradually increases, the water in the center of the concrete ball to be tested can penetrate more evenly toward the outside of the concrete ball to be tested. If the outer surface of the detection column is completely in contact with the concrete ball to be tested, it is easy to cause a single point of water pressure to penetrate outward, resulting in inaccurate detection results. The setting of the one-way valve prevents the water mixed with the concrete from flowing back into the drainage trough, reducing the problem of drainage trough blockage.

[0013] Preferably, a gear ring is fixed to the outer side of the detection column near the bottom, and a transmission gear is meshed on the outer side of the gear ring. A reduction motor for driving the transmission gear to rotate is fixed to the bottom of the transmission gear. The reduction motor is located in the base box and fixed to the base box. As the water pressure gradually increases, water will gradually penetrate into the surface of the concrete ball to be detected. In order to facilitate the observation of the water seepage on the surface of the concrete ball to be detected, the transmission gear is driven to rotate by the reduction motor, and the transmission gear drives the entire detection column to rotate. Since there is a huge friction between the top surface and the side expanded sealing ring of the detection column and the concrete ball to be detected, the concrete ball to be detected can be driven to rotate slowly when the detection column rotates. In this way, the inspector or the detection camera can fully observe the water seepage on the surface of the concrete ball to be detected from only one side of the device.

[0014] Preferably, the bottom of the detection column is rotatably connected to a transmission seat, the air flow groove and the drainage groove are both connected to the transmission seat, the transmission seat is fixedly connected to the base box, the outer side of the detection column is rotatably connected to the top surface of the base box near the top, the output end of the water pipe is connected to the drainage groove through the bottom of the transmission seat, and a solenoid valve 2 is installed between the water pipe and the transmission seat, the output end of the air pressure tube is fixedly connected to a connecting pipe, the outer side of the transmission seat is fixedly connected to two three-way valves, the interior of the transmission seat is provided with an annular groove connected to the two air flow grooves, the annular groove is connected to one end of the three-way valve, and the other two ends of the three-way valve are respectively connected to the outside and the connecting pipe. When the detection column rotates, The transmission seat at the bottom remains stationary, and the detection column rotates on the top of the transmission seat. The water in the water tank passes through the water pipe, solenoid valve 2 and the middle of the transmission seat, and is finally delivered to the drain tank. The air pressure of the air pump is transmitted to multiple connecting pipes through the air pressure pipe. The connecting pipes transmit the air pressure to the two three-way valves of the transmission seat. The two three-way valves then transmit the air pressure to the annular groove, and the annular groove then transmits the air pressure to the air flow groove, thereby completing the transmission of air pressure. This setting ensures that the transmission of air pressure and water flow can proceed normally during the rotation of the detection column; when the concrete ball to be tested needs to be taken out, the three-way valve is opened to release the air pressure in the sealing ring, so that the concrete ball to be tested can be easily taken out.

[0015] Preferably, a power box is fixedly connected to one side of the base box, and a plurality of side columns for restraining the concrete ball to be tested are fixedly connected to the top of the power box. A drill bit is provided at the center of the plurality of side columns, and a drive motor for driving the drill bit to rotate is fixedly connected to the bottom of the drill bit. A vacuum cleaner is installed inside the power box, and the suction end of the vacuum cleaner is located on the top surface of the power box. The desired concrete ball to be tested can be directly prepared using a mold, or a spherical concrete sample can be prepared first, because the spherical concrete sample is more convenient to prepare. After preparation, the spherical concrete sample is directly placed between the plurality of side columns from top to bottom, and the drive motor is started to drive the drill bit to rotate. Under the huge gravity of the concrete sample, the drill bit will continuously drill a hole towards the center of the concrete sample. When the concrete sample descends to the bottom and contacts the top surface of the power box, the drilling is completed, thereby preparing the desired concrete ball to be tested. The vacuum cleaner absorbs and stores powder and fragments generated by grinding. In order to ensure the smoothness of the hole wall of the concrete ball to be tested, appropriate grinding or coating with paraffin wax or other means to provide sealing can be performed.

[0016] Preferably, a fence is fixedly connected to the edge of the top surface of the base box, and a spacer is sleeved on the outer side of the detection column. The spacer is located above the base box. The fence is set to prevent water generated during the working process from flowing outward, but remain on the top surface of the base box. The spacer is set to prevent water on the top surface of the base box from falling into the interior of the base box and affecting the internal electrical equipment.

[0017] Preferably, a recovery box is provided at one end of the base box away from the power box, and a drainage pipe extending to the top surface of the base box is fixedly connected to the top of the recovery box. After the inspection is completed, the water on the top of the power box can be directly pushed toward the recovery box using a rag or other tools, so that the accumulated water can be transferred to the recovery box through the drainage pipe, which facilitates subsequent processing work.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The present invention discloses a device for testing the permeability of concrete. By providing a testing column, the test mold required by conventional devices is eliminated. A spherical concrete ball to be tested is fabricated, and a cylindrical hole reaching the center of the concrete ball is formed at the bottom of the concrete ball. The concrete ball is then fitted onto the testing column from top to bottom, with the top of the testing column positioned at the center of the concrete ball. Multiple sealing rings are then expanded to seal the gap between the testing column and the hole in the concrete ball. After completion, water is injected from a water tank into the top of the testing column, with the top of the testing column positioned at the center of the ball. As the pressure of the injected water gradually increases, water gradually permeates the concrete ball. Since any vertical distance from the center of the ball to the surface is constant, the test process ends when water seepage is detected on the surface of the concrete ball. Data such as the water pressure and the test time are recorded, completing the test process for the permeability of concrete. This configuration eliminates the need for a conventional test mold structure, omits a large number of preprocessing steps, and effectively improves test efficiency.

[0020] 2. In the device for testing the impermeability of concrete described in the present invention, the setting of the testing column allows water discharged upward from the drainage trough to gather in the concave part of the testing column. In this way, as the water pressure gradually increases, the water in the center of the concrete ball to be tested can penetrate more evenly toward the outside of the concrete ball to be tested. If the outer surface of the testing column is completely in contact with the concrete ball to be tested, single-point outward penetration of water pressure is likely to occur, resulting in inaccurate test results. The setting of the one-way valve prevents water mixed with concrete from flowing back into the drainage trough, thereby reducing the problem of drainage trough blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 It is a first perspective stereogram of the present invention;

[0023] Figure 2 is a second perspective stereogram of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure inside the base box of the present invention;

[0025] Figure 4It is a schematic structural diagram of the detection column of the present invention;

[0026] Figure 5 is a bottom cross-sectional view of the detection column of the present invention;

[0027] Figure 6 is a perspective view of the water pipe and the air pressure pipe of the present invention;

[0028] Figure 7 It is a perspective view of the power box of the present invention;

[0029] In the figure: 1. Base box; 2. Test column; 3. Concrete ball to be tested; 4. Power box; 5. Fence; 6. Drain pipe; 7. Recovery box; 8. Side column; 9. Drill bit; 10. Air pump; 11. Water tank; 12. Water pipe; 13. Air pressure pipe; 14. Drain trough; 16. One-way valve; 17. Sealing ring; 18. Gear ring; 19. Spacer; 20. Reducer motor; 21. Transmission gear; 22. Transmission seat; 23. Three-way valve; 24. Air flow groove; 25. Connecting pipe; 26. Solenoid valve 1; 27. Solenoid valve 2; 28. Vacuum cleaner. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0031] like Figures 1 to 7 As shown, a device for testing concrete impermeability according to an embodiment of the present invention includes a base box 1, a top surface of which is provided with a plurality of testing columns 2 arranged in a rectangular array. The testing columns 2 are used to place concrete balls 3 to be tested, and a cylindrical hole extending directly through the center of the concrete balls 3 is formed at the bottom of the testing columns 2. A plurality of annular, expandable sealing rings 17 are fixed to the outer sides of the testing columns 2. A water tank 11 is provided inside the base box 1 for filling the tops of the plurality of testing columns 2 with water.

[0032] By setting up the detection column 2, the test mold required by the traditional device is abandoned. It is only necessary to make a spherical concrete ball 3 to be detected, and open a cylindrical hole reaching the center of the ball at the bottom of the concrete ball 3 to be detected. The concrete ball 3 to be detected is sleeved on the detection column 2 from top to bottom, and the top of the detection column 2 is located at the center of the concrete ball 3 to be detected. Then, multiple sealing rings 17 are expanded to seal the gap between the detection column 2 and the hole of the concrete ball 3 to be detected. After completion, the water tank 11 is filled with water to the top of the detection column 2, so that the top of the detection column 2 is located at the center of the ball. As the pressure of the injected water gradually increases, the water will gradually penetrate outward through the concrete ball 3 to be detected. Since any vertical distance from the center of the ball to the spherical surface is equal, when water seepage is found on the surface of the concrete ball 3 to be detected, the detection process is terminated, and data such as water pressure and detection time are recorded to complete the process of detecting the impermeability of concrete. This setting does not require the use of a traditional test mold structure, omits a large number of pretreatment steps, and effectively improves the detection efficiency. The traditional test mold structure and the sealing structure of the concrete are often disposable. Generally, multiple sealing pads are put on the outside of the concrete or sealing materials such as paraffin are applied to the outside of the concrete. Since they need to be used every time a test is performed, the consumption is large and the problem of loose sealing may occur. The multiple expandable sealing rings 17 are not only reusable, but also injecting air pressure far exceeding the water pressure into the sealing rings 17 can make it difficult for the water source in the center of the ball to pass through the sealing rings 17, thereby ensuring the sealing between the concrete ball 3 to be tested and the detection column 2. In traditional experiments, in order to ensure the reliability and accuracy of the test results, a certain amount of concrete samples is required. Multiple test molds can provide more data points, thereby reducing the influence of accidental errors. Generally, six are grouped together, and the number of detection columns 2 needs to be greater than or equal to six.

[0033] A drainage groove 14 is provided in the middle of the inner side of the detection column 2. A water pipe 12 is fixedly connected to the top of the water tank 11. A water pump for pressurizing and discharging the water inside the water tank 11 is installed inside the water tank 11. The water pipe 12 has multiple vertical drainage ends, which are connected to the drainage groove 14 at the bottom of the detection column 2.

[0034] During operation, the water pump in the water tank 11 can press the water in the water tank 11 outwards, and finally transmit the water to the center position of the concrete ball 3 to be tested through the bottom drainage groove 14 of the testing column 2.

[0035] The plurality of sealing rings 17 are arranged equidistantly from top to bottom on the outside of the detection column 2. The interior of the sealing ring 17 is hollow and has a double-layer structure. An air pump 10 for filling the sealing ring 17 with air pressure is provided inside the base box 1.

[0036] During operation, appropriate air pressure is injected into the sealing ring 17 through the air pump 10. Multiple sealing rings 17 are arranged equidistantly, which not only ensures the sealing between the concrete ball 3 to be tested and the detection column 2, but also has a double-layer structure. The inner sealing ring 17 is used for inflation, and the outer sealing ring 17 is made of wear-resistant material and is in direct contact with the concrete ball 3 to be tested. This arrangement not only ensures an ultra-long service life of the sealing ring 17, but also prevents the internal air pressure from leaking even if the inner sealing ring 17 leaks.

[0037] Two vertical airflow slots 24 are provided on the outer side of the interior of the detection column 2. The output end of the air pump 10 is connected to the air pressure tube 13. The air pressure tube 13 has multiple output ends adapted to the number of detection columns 2, and each output end is installed with a solenoid valve 26. The multiple output ends of the air pressure tube 13 are respectively connected to the airflow slots 24 inside each detection column 2;

[0038] During operation, the air pump 10 generates air pressure and outputs it to the outside through the air pressure tube 13. By opening and closing multiple solenoid valves 26, the air pressure can be controlled to fill the air pressure into different groups of sealing rings 17. The air pressure is filled into multiple sealing rings 17 at equal pressure through the air flow groove 24 to control the expansion of the sealing ring 17.

[0039] The outer side of the detection column 2 is concave near the top, and multiple one-way valves 16 connected to the drainage groove 14 are installed on the concave part and the top of the detection column 2;

[0040] During operation, the top structure of the detection column 2 is set so that the water discharged upward from the drainage groove 14 can be collected in the concave part of the detection column 2. In this way, as the water pressure gradually increases, the water in the center of the concrete ball 3 to be detected can penetrate more evenly toward the outside of the concrete ball 3 to be detected. If the outer surface of the detection column 2 is completely in contact with the concrete ball 3 to be detected, it is easy to cause a single point of water pressure to penetrate outward, resulting in inaccurate detection results. The setting of the one-way valve 16 prevents the water mixed with the concrete from flowing back into the drainage groove 14, reducing the problem of clogging of the drainage groove 14.

[0041] A gear ring 18 is fixedly connected to the outer side of the detection column 2 near the bottom. A transmission gear 21 is meshed with the outer side of the gear ring 18. A reduction motor 20 is fixedly connected to the bottom of the transmission gear 21 for driving the transmission gear 21 to rotate. The reduction motor 20 is located in the base box 1 and is fixedly connected to the base box 1.

[0042] During operation, as the water pressure gradually increases, water will gradually penetrate into the surface of the concrete ball 3 to be inspected. In order to facilitate the observation of the water seepage on the surface of the concrete ball 3 to be inspected, the transmission gear 21 is driven to rotate by the reduction motor 20, and the transmission gear 21 drives the entire detection column 2 to rotate. Due to the huge friction between the top surface and the side expanded sealing ring 17 of the detection column 2 and the concrete ball 3 to be inspected, the concrete ball 3 to be inspected can be driven to rotate slowly when the detection column 2 rotates. In this way, the inspector or the detection camera can fully observe the water seepage on the surface of the concrete ball 3 to be inspected only from one side of the device.

[0043] The bottom of the detection column 2 is rotatably connected to the transmission seat 22, and the air flow groove 24 and the drainage groove 14 are both connected to the transmission seat 22. The transmission seat 22 is fixed to the base box 1, and the outer side of the detection column 2 is rotatably connected to the top surface of the base box 1 near the top. The output end of the water pipe 12 is connected to the drainage groove 14 through the bottom of the transmission seat 22, and a solenoid valve 27 is installed between the water pipe 12 and the transmission seat 22. The output end of the air pressure tube 13 is fixedly connected to the connecting pipe 25. Two three-way valves 23 are fixedly connected to the outside of the transmission seat 22. An annular groove connected to the two air flow grooves 24 is opened inside the transmission seat 22. The annular groove is connected to one end of the three-way valve 23, and the other two ends of the three-way valve 23 are respectively connected to the outside and the connecting pipe 25;

[0044] During operation, when the detection column 2 rotates, the transmission seat 22 at the bottom remains stationary, and the detection column 2 rotates on the top of the transmission seat 22. The water in the water tank 11 passes through the water pipe 12, the solenoid valve 2 27 and the middle of the transmission seat 22, and is finally transported to the drainage groove 14. The air pressure of the air pump 10 is transmitted to the multiple connecting pipes 25 through the air pressure pipe 13. The connecting pipes 25 are then transmitted to the two three-way valves 23 of the transmission seat 22. The two three-way valves 23 then transmit the air pressure to the annular groove, and the annular groove then transmits the air pressure to the air flow groove 24, thereby completing the transmission of air pressure. This arrangement ensures that the transmission of air pressure and water flow can proceed normally during the rotation of the detection column 2. When it is necessary to take out the concrete ball 3 to be tested, the three-way valve 23 is opened to release the air pressure in the sealing ring 17, so that the concrete ball 3 to be tested can be easily taken out.

[0045] A power box 4 is fixedly connected to one side of the base box 1. A plurality of side columns 8 for restraining the concrete balls 3 to be tested are fixedly connected to the top of the power box 4. A drill bit 9 is provided at the center of the plurality of side columns 8. A drive motor for driving the drill bit 9 to rotate is fixedly connected to the bottom of the drill bit 9. A dust collector 28 is installed inside the power box 4. The suction end of the dust collector 28 is located on the top surface of the power box 4.

[0046] During operation, the mold can be used to directly prepare the required concrete ball 3 to be tested, or a spherical concrete sample can be prepared first, because the spherical concrete sample is more convenient to prepare. After preparation, the spherical concrete sample is directly placed between the multiple side columns 8 from top to bottom, and the drive motor is started to drive the drill bit 9 to rotate. Under the huge gravity of the concrete sample, the drill bit 9 will continue to drill holes towards the center of the concrete sample. When the concrete sample drops to the bottom and contacts the top surface of the power box 4, the drilling is completed, thereby preparing the required concrete ball 3 to be tested. The vacuum cleaner 28 is used to absorb and store the powder and fragments generated by grinding. In order to ensure the smoothness of the hole wall of the concrete ball 3 to be tested, appropriate grinding or smearing of paraffin wax or other means to provide sealing can be performed.

[0047] A barrier 5 is fixed to the top edge of the base box 1 , and a spacer 19 is sleeved on the outer side of the detection column 2 , and the spacer 19 is located above the base box 1 ;

[0048] During operation, the setting of the enclosure 5 is to prevent the water generated during the working process from flowing out, but to remain on the top surface of the base box 1. The setting of the spacer 19 is to prevent the water on the top surface of the base box 1 from falling into the interior of the base box 1 and affecting the internal electrical equipment.

[0049] A recovery box 7 is provided at one end of the base box 1 away from the power box 4, and a drainage pipe 6 extending to the top surface of the base box 1 is fixedly connected to the top of the recovery box 7;

[0050] During operation, after the inspection is completed, the water on the top of the power box 4 can be directly pushed toward the recovery box 7 using a rag or other tool, so that the accumulated water is transferred to the recovery box 7 through the drain pipe 6, which facilitates subsequent processing work.

[0051] During operation, by setting up the detection column 2, the test mold required by the traditional device is abandoned. It is only necessary to make a spherical concrete ball 3 to be detected, and open a cylindrical hole that reaches the center of the ball at the bottom of the concrete ball 3 to be detected. The concrete ball 3 to be detected is sleeved on the detection column 2 from top to bottom, and the top of the detection column 2 is located at the center of the concrete ball 3 to be detected. Then, multiple sealing rings 17 are expanded to seal the gap between the detection column 2 and the hole of the concrete ball 3 to be detected. After completion, the water tank 11 is filled with water to the top of the detection column 2, so that the top of the detection column 2 is located at the center of the ball. As the water pressure of the injected water gradually increases, the water will gradually penetrate through the concrete ball 3 to be detected and penetrate outward. Since any vertical distance from the center of the ball to the spherical surface is equal, when it is found that the surface of the concrete ball 3 to be detected appears When water seepage occurs, the detection process ends, and data such as water pressure and detection time are recorded to complete the concrete impermeability detection process. Through this setting, there is no need to use the traditional test mold structure, a large number of pretreatment steps are omitted, and the detection efficiency is effectively improved. The traditional test mold structure and the sealing structure of the concrete are often disposable. Generally, multiple sealing pads are put on the outside of the concrete or sealing materials such as paraffin are applied to the outside of the concrete. Since they need to be used every time they are tested, the consumption is large and the problem of loose sealing is prone to occur. The multiple expandable sealing rings 17 are not only reusable, but also injecting air pressure far exceeding the water pressure into the sealing ring 17 can make it difficult for the water source in the center of the ball to pass through the sealing ring 17, thereby ensuring the sealing between the concrete ball 3 to be tested and the detection column 2.

[0052] The water pump in the water tank 11 can press the water in the water tank 11 outwards and finally transmit the water to the center position of the concrete ball 3 to be tested through the bottom drainage groove 14 of the detection column 2;

[0053] The air pump 10 injects appropriate air pressure into the sealing ring 17. The multiple sealing rings 17 are arranged equidistantly, which not only ensures the sealing between the concrete ball 3 to be tested and the testing column 2, but also has a double-layer structure. The inner sealing ring 17 is used for inflation, and the outer sealing ring 17 is made of wear-resistant material and is in direct contact with the concrete ball 3 to be tested. This arrangement not only ensures an ultra-long service life of the sealing ring 17, but also prevents the internal air pressure from leaking even if the inner sealing ring 17 leaks.

[0054] The air pump 10 generates air pressure and outputs it to the outside through the air pressure pipe 13. By opening and closing multiple solenoid valves 26, the air pressure can be controlled to fill the air pressure into different groups of sealing rings 17. The air pressure is filled into multiple sealing rings 17 at equal pressure through the air flow grooves 24, controlling the expansion of the sealing rings 17;

[0055] The top structure of the detection column 2 is set so that the water discharged upward from the drainage groove 14 can be collected in the concave part of the detection column 2. In this way, as the water pressure gradually increases, the water in the center of the concrete ball 3 to be tested can be more evenly penetrated toward the outside of the concrete ball 3 to be tested. If the outer surface of the detection column 2 is completely in contact with the concrete ball 3 to be tested, it is easy to cause a single point of water pressure to penetrate outward, resulting in inaccurate test results. The setting of the one-way valve 16 prevents the water mixed with the concrete from flowing back into the drainage groove 14, reducing the problem of clogging of the drainage groove 14.

[0056] As the water pressure gradually increases, water will gradually penetrate into the surface of the concrete ball 3 to be inspected. In order to facilitate the observation of the water seepage on the surface of the concrete ball 3 to be inspected, the transmission gear 21 is driven to rotate by the reduction motor 20, and the transmission gear 21 drives the entire detection column 2 to rotate. Due to the huge friction between the top surface and the expanded sealing ring 17 on the side of the detection column 2 and the concrete ball 3 to be inspected, the detection column 2 can drive the concrete ball 3 to be inspected to rotate slowly when it rotates. In this way, the inspector or the inspection camera can fully observe the water seepage on the surface of the concrete ball 3 to be inspected by only one side of the device.

[0057] When the detection column 2 rotates, the transmission seat 22 at the bottom remains stationary, and the detection column 2 rotates on the top of the transmission seat 22. The water in the water tank 11 passes through the water pipe 12, the solenoid valve 27 and the middle of the transmission seat 22, and is finally delivered to the drainage groove 14. The air pressure of the air pump 10 is transmitted to the multiple connecting pipes 25 through the air pressure pipe 13. The connecting pipes 25 are then transmitted to the two three-way valves 23 of the transmission seat 22. The two three-way valves 23 then transmit the air pressure to the annular groove, and the annular groove then transmits the air pressure to the air flow groove 24, thereby completing the transmission of air pressure. This arrangement ensures that the transmission of air pressure and water flow can proceed normally during the rotation of the detection column 2. When it is necessary to take out the concrete ball 3 to be tested, the three-way valve 23 is opened to release the air pressure in the sealing ring 17, so that the concrete ball 3 to be tested can be easily taken out.

[0058] The required concrete ball 3 to be tested can be directly prepared using a mold, or a spherical concrete sample can be prepared first, because the spherical concrete sample is more convenient to prepare. After preparation, the spherical concrete sample is directly placed between the multiple side columns 8 from top to bottom, and the drive motor is started to drive the drill bit 9 to rotate. Under the huge gravity of the concrete sample, the drill bit 9 will continue to drill towards the center of the concrete sample. When the concrete sample drops to the bottom and contacts the top surface of the power box 4, the drilling is completed, thereby preparing the required concrete ball 3 to be tested. The vacuum cleaner 28 is used to absorb and store the powder and fragments generated by grinding. In order to ensure the smoothness of the hole wall of the concrete ball 3 to be tested, appropriate grinding or coating with paraffin wax or other means to provide sealing can be performed;

[0059] The setting of the enclosure 5 is to prevent the water generated during the working process from flowing outwards, but to remain on the top surface of the base box 1. The setting of the spacer 19 is to prevent the water on the top surface of the base box 1 from falling into the interior of the base box 1 and affecting the internal electrical equipment;

[0060] When the detection is completed, the water on the top of the power box 4 can be directly pushed toward the recovery box 7 using a rag or other tool, so that the accumulated water is transferred to the recovery box 7 through the drain pipe 6, which facilitates subsequent processing work.

[0061] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting concrete impermeability, characterized in that: The apparatus comprises a base box, the top surface of which is provided with a plurality of detection columns arranged in a rectangular array, the detection columns being used to place concrete balls to be tested, the bottom of the concrete balls to be tested being provided with cylindrical holes extending directly through the center of the balls, the outer sides of the detection columns being fixed with a plurality of annular, expandable sealing rings, and the interior of the base box being provided with a water tank for filling the tops of the plurality of detection columns with water; A drainage groove is provided in the middle of the inner side of the detection column. A water pipe is fixedly connected to the top of the water tank. A water pump for pressurizing and discharging the internal water is installed inside the water tank. The water pipe has multiple vertical drainage ends, which are connected to the drainage groove at the bottom of the detection column. Two vertical airflow slots are provided on the outside of the detection column. The output end of the air pump is connected to an air pressure tube. The air pressure tube has multiple output ends adapted to the number of detection columns, and each output end is equipped with a solenoid valve. The multiple output ends of the air pressure tube are respectively connected to the airflow slots inside each detection column. A gear ring is fixed to the outside of the detection column near the bottom, and a transmission gear is meshed on the outside of the gear ring. A reduction motor for driving the transmission gear to rotate is fixed to the bottom of the transmission gear. The reduction motor is located in the base box and is fixed to the base box. The transmission gear is driven by a reduction motor to rotate, and the transmission gear drives the entire detection column to rotate. Due to the huge friction between the top surface and the expanded sealing ring on the side of the detection column and the concrete ball to be tested, the detection column rotates, driving the concrete ball to be tested to rotate slowly. In this way, the inspector or the inspection camera can fully observe the water seepage situation on the surface of the concrete ball to be tested from only one side of the device. The bottom of the detection column is rotatably connected to the transmission seat, the air flow groove and the drainage groove are both connected to the transmission seat, the transmission seat is fixed to the base box, the outer side of the detection column is rotatably connected to the top surface of the base box near the top, the output end of the water pipe is connected to the drainage groove through the bottom of the transmission seat, and a second solenoid valve is installed between the water pipe and the transmission seat, the output end of the air pressure tube is fixedly connected to a connecting pipe, two three-way valves are fixedly connected to the outer side of the transmission seat, and an annular groove connected to the two air flow grooves is provided inside the transmission seat. The annular groove is connected to one end of the three-way valve, and the other two ends of the three-way valve are respectively connected to the outside world and the connecting pipe.

2. A concrete impermeability testing device according to claim 1, characterized in that: Multiple sealing rings are arranged equidistantly from top to bottom on the outside of the detection column. The inside of the sealing ring is hollow and has a double-layer structure. An air pump for filling the sealing ring with air pressure is provided inside the base box.

3. A concrete impermeability testing device according to claim 1, characterized in that: The outer side of the detection column is arranged in a concave shape near the top, and a plurality of one-way valves connected with the drainage groove are installed at the concave part and the top of the detection column.

4. A concrete impermeability testing device according to claim 1, characterized in that: A power box is fixedly connected to one side of the base box, and a plurality of side columns for restraining the concrete balls to be tested are fixedly connected to the top of the power box. A drill bit is provided at the center position of the plurality of side columns, and a drive motor for driving the drill bit to rotate is fixedly connected to the bottom of the drill bit. A vacuum cleaner is installed inside the power box, and the suction end of the vacuum cleaner is located on the top surface of the power box.

5. A concrete impermeability testing device according to claim 4, characterized in that: A barrier is fixedly connected to the edge of the top surface of the base box, and a spacer is sleeved on the outer side of the detection column, and the spacer is located above the base box.

6. A concrete impermeability testing device according to claim 5, characterized in that: A recovery box is provided at one end of the base box away from the power box, and a drainage pipe extending to the top surface of the base box is fixedly connected to the top of the recovery box.

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