A concrete water seepage resistance testing machine and testing method thereof

Abstract

The present invention discloses a concrete water seepage resistance testing machine, including a base, a concrete support assembly, a pneumatic water delivery mechanism and a gear assembly, a liquid collecting tank is fixedly mounted on the base, and the open end of the liquid collecting tank is connected to the concrete support assembly, the upper surface of the base is connected to a support rod, and the upper lower end of the support rod is coaxially fixedly connected to the upper surface of a mounting plate, a pneumatic water delivery mechanism is arranged between the lower surface of the mounting plate and the side of the liquid collecting tank, and a spraying plate is connected to the pneumatic water delivery mechanism. The invention can make the surface of the concrete test block completely contact with water, and then can completely detect the water seepage resistance of the concrete test block, which is convenient for improving the accuracy of the detection, and can also facilitate the detection of disc-shaped concrete test blocks of different sizes and square concrete test blocks of different sizes. At the same time, the detection machine only sets a liquid collecting tank as a water receiving container and a drainage container, which not only saves costs, but also helps water recycling and is easy to operate.

Description

Technical Field

[0001] The invention relates to the technical field of concrete performance detection, in particular to a concrete water seepage resistance detection machine and a detection method thereof. Background Art

[0002] Concrete is one of the most important structural materials in today's construction projects. It is widely used in the construction of various types of buildings, bridges, tunnels, water conservancy projects and other infrastructure. Since concrete structures are usually exposed to different environmental conditions, their water seepage resistance is directly related to the durability and service life of the structure.

[0003] In order to ensure the quality and safety of concrete structures, it is necessary to test the water seepage resistance of concrete. Through testing, we can understand the water seepage resistance level of concrete, evaluate its performance in actual use, and provide a basis for design, construction and quality control. At the same time, the test results can also provide a reference for the maintenance and repair of concrete structures.

[0004] The existing concrete water seepage resistance testing machine still has the following technical problems when in use, such as:

[0005] 1. When using the existing concrete water seepage resistance testing machine, it is not convenient to ensure that the surface of the concrete test block is completely in contact with water. This is because in order to facilitate the installation and removal of the concrete test block, the general concrete test block is placed on a supporting member, and the sides are not sealed. If water is in contact with the surface of the concrete test block, a small amount of water will overflow from the sides. Therefore, the surface of the general concrete test block is only partially in contact with water, and the water seepage resistance of the concrete test block is tested by the amount of water received by the water receiving container below. This method of testing cannot make the surface of the concrete test block completely in contact with water, so it cannot improve the accuracy of the test;

[0006] 2. The existing concrete water seepage resistance testing machine requires water receiving containers, water tanks, water pumps and other equipment during use. The water pumps and water tanks are set up so that when recycling water, the water in the water receiving container needs to be poured into the water tank before the water can be recycled, which is troublesome;

[0007] Therefore, a concrete water seepage resistance testing machine and a testing method thereof are needed to solve the above problems. Summary of the invention

[0008] The purpose of the present invention is to provide a concrete water seepage resistance testing machine and a testing method thereof, so as to solve the problem mentioned in the above background technology that the existing concrete water seepage resistance testing machine is not convenient for improving the detection accuracy and is not convenient for water recycling.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] A concrete water seepage resistance testing machine comprises a base, a concrete support assembly, a pneumatic water delivery mechanism and a gear assembly, wherein a liquid collecting tank is fixedly mounted on the base, and the open end of the liquid collecting tank is connected to the concrete support assembly, the upper surface of the base is connected to a support rod, and the upper lower end of the support rod is coaxially fixedly connected to the upper surface of a mounting plate, a pneumatic water delivery mechanism is arranged between the lower surface of the mounting plate and the side surface of the liquid collecting tank, and a spraying plate is connected to the pneumatic water delivery mechanism, an inner cavity is arranged inside the spraying plate, and the inner cavity is connected to the lower surface of the spraying plate through spraying holes, the inner cavity is an inverted flat cone, and the spraying holes are evenly distributed in the inner cavity, a gear assembly is arranged between the pneumatic water delivery mechanism and the spraying plate, and the gear assembly is used to drive the pneumatic water delivery mechanism to operate.

[0011] Furthermore, the concrete support assembly includes a square trough, a rubber gasket and a truncated cone tube, the inner side of the truncated cone tube supports the square trough, and the inner sides of the truncated cone tube and the square trough are both padded with rubber gaskets.

[0012] By adopting the above technical solution, the square trough can be supported by the truncated cone tube, making it more convenient when it is necessary to detect a disc-shaped concrete test block or a square concrete test block.

[0013] Furthermore, the inner side of the truncated cone tube and the outer side of the square trough are truncated cone shapes that match each other, and the inner side of the square trough is a quadrangular prism.

[0014] By adopting the above technical solution, through the structural shapes of the square groove table and the round table tube, the detection machine can detect disc-shaped test blocks of different sizes and square test blocks of different sizes.

[0015] Furthermore, the rubber gasket is in the shape of a quadrangular prism or a truncated cone, so that it can be placed on the inner side of a square trough or the inner side of a truncated cone tube.

[0016] By adopting the above technical solution, it is convenient to use a quadrangular prism-shaped or truncated cone-shaped rubber gasket so that the sides of a square concrete test block or a disc-shaped concrete test block can be tightly attached and sealed with the corresponding rubber gasket, so that the entire surface of the concrete test block is in contact with water, thereby improving the accuracy of the detection.

[0017] Furthermore, the inner and outer diameters of the liquid collecting tank are both between the minimum outer diameter and the maximum outer diameter of the truncated cone tube.

[0018] By adopting the above technical solution, the truncated cone tube can be easily installed on the liquid collecting tank, and when a concrete test block is placed on the truncated cone tube, the liquid collecting tank is in a completely closed space through the sealing ring and the rubber gasket.

[0019] Furthermore, the pneumatic water delivery mechanism includes an L-shaped observation tube, a visual window, a hose, an air guide tube, a sealing ring, a piston assembly, a limit groove, a limit rod, a piston tube and an air hole. The L-shaped observation tube is connected to the lower end of the outer side of the liquid collecting tank, and the upper end of the outer side of the liquid collecting tank is connected to the lower end of the air guide tube. The air guide tube and the L-shaped observation tube are arranged at a right angle, and the upper end of the L-shaped observation tube is connected to the lower end of the hose, and the upper end of the hose is connected to the inner cavity. The piston tube is coaxially installed on the lower surface of the mounting plate, and the piston tube is connected to the upper end of the air guide tube. The piston tube is provided with an air hole, and the lower end of the piston tube is seamlessly slidably connected to the lower end of the piston assembly, the lower end of the piston assembly is coaxially fixedly connected to the upper surface of the spray plate, and the upper end of the piston assembly is seamlessly slidably connected to the inner side of the piston tube, the upper end of the piston tube is provided with a limiting groove, and a limiting rod is movably connected in the limiting groove, and the upper end of the limiting rod is coaxially fixedly connected to the lower surface of the mounting plate, the visual window is provided on the L-shaped observation tube, the liquid collecting tank and the piston tube, and the visual window is engraved with scales, and the sealing ring is installed at the upper end of the liquid collecting tank.

[0020] By adopting the above technical scheme, the piston assembly can be driven to move downward by the downward movement of the spray plate, thereby squeezing the gas in the piston tube, causing the gas in the piston tube to enter the air duct, thereby increasing the pressure in the liquid collecting tank, and then allowing the water in the liquid collecting tank to enter the inner cavity in the spray plate through the L-shaped observation tube and the hose, and be sprayed onto the concrete test block through the spray hole. After that, when the air hole and the air duct are connected, the principle of communicating vessels is used to make the liquid levels in the L-shaped observation tube, the liquid collecting tank and the air duct at the same level, thereby facilitating subsequent precise measurements.

[0021] Furthermore, the height of the lower end of the L-shaped observation tube is lower than the height of the lower end of the air guide tube, and the height of the air hole is higher than the height of the upper end of the air guide tube.

[0022] By adopting the above technical solution, water can be prevented from entering the air duct, and gas can be transported through the air duct to increase the air pressure in the liquid collecting tank, and the water in the liquid collecting tank can be squeezed into the L-shaped observation tube conveniently.

[0023] Furthermore, the inner sides of the airway tube, the L-shaped observation tube and the inner cavity are all provided with a hydrophobic layer, and the inner side of the rubber gasket is also provided with a hydrophobic layer.

[0024] By adopting the above technical solution, water can be prevented from adhering to the wall through the hydrophobic layer, thereby helping to improve the accuracy of detection and avoid inaccurate measurement due to water adhering to the wall.

[0025] Furthermore, the gear assembly includes a screw rod, a twisted tube, a driving gear, a transmission gear, a twisted rod and a follower gear. The two screw rods are threaded through the mounting plate, and the lower ends of the two screw rods are respectively bearing-connected to the diagonal positions of the upper surface of the spray plate. The lower end of the screw rod is key-connected with the follower gear, and the two follower gears are meshingly connected with the transmission gear. The transmission gear bearing is connected to the lower end of the piston assembly, and the transmission gear is meshingly connected with the driving gear. The driving gear key is connected to the outside of the twisted tube, and the lower end bearing of the twisted tube is connected to the upper surface of the spray plate. A twisted rod is movably penetrated on the spray plate, and the twisted rod thread is penetrated through the twisted tube, and the upper end of the twisted rod is movably penetrated to the top of the mounting plate. The inner side of the twisted tube and the outer side of the twisted rod are mutually matching twisted threads, and a pull ring is provided at the lower end of the twisted rod.

[0026] By adopting the above technical solution, the twisted rod is pulled down to rotate the twisted tube, and then the follower gear is driven to rotate through the driving gear and the transmission gear, so that the screw rod rotates. Since the screw rod is threadedly connected to the mounting plate, the position of the lower end of the screw rod can be adjusted, that is, the spray plate and the piston assembly can be driven to move downward synchronously, thereby driving the pneumatic water delivery mechanism to operate.

[0027] A method for detecting the water seepage resistance of concrete, the method comprising:

[0028] Step 1: First, inject a certain amount of water into the liquid collecting tank, and then select different concrete support components according to the needs. For example, if you need to test a square concrete test block, you need to put the square trough into the round tube, and put the quadrangular rubber gasket on the inner side of the square trough, and then put the square concrete test block inside the rubber gasket;

[0029] If you need to test a disc-shaped concrete test block, you only need to put the truncated cone-shaped rubber gasket into the truncated cone tube and place the disc-shaped concrete test block inside the corresponding rubber gasket;

[0030] Step 2: Install the truncated cone tube at the upper opening of the liquid collecting tank, squeeze and seal the outer side of the truncated cone tube with the sealing ring, and seal the truncated cone tube or the square trough with the concrete test block with a rubber gasket to form a closed space in the liquid collecting tank;

[0031] Step 3: Pull the pull ring to move the twist rod downward a short distance relative to the twist tube, so that the twist tube can drive the driving gear to rotate, and then drive the screw rod to rotate through the transmission gear and the follower gear. The rotation of the screw rod makes the spray plate move downward, so that the spray plate is close to the concrete test block;

[0032] At the same time, the piston assembly moves downward relative to the piston tube, thereby squeezing the gas in the piston tube, causing the gas to enter the liquid collecting tank through the air guide tube, thereby increasing the air pressure in the liquid collecting tank, so that the water in the liquid collecting tank can be pressed into the L-shaped observation tube. The liquid level in the L-shaped observation tube and the liquid collecting tank and the position of the upper end of the piston assembly in the piston tube are observed through the visual window to detect whether the liquid collecting tank is completely sealed. If the scales are inconsistent, it proves that the sealing ring is severely worn and needs to be replaced.

[0033] Step 4: Continue to pull the pull ring, and through the process of step 3, the water in the liquid collecting tank passes through the L-shaped observation tube and the hose, enters the inner cavity, and is sprayed from the spray hole to the concrete test block until the air hole and the air guide tube are connected;

[0034] At this time, under the action of atmospheric pressure, the liquid levels in the liquid collecting tank and the L-shaped observation tube will be at the same position, and the liquid level height at this time is recorded;

[0035] Wait for a while, observe the water level in the collecting tank and the L-shaped observation tube, and then derive the water permeability of the concrete based on the liquid level.

[0036] Compared with the prior art, the invention has the following beneficial effects: the concrete water seepage resistance testing machine can make the surface of the concrete test block completely contact with water, thereby being able to completely test the water seepage resistance of the concrete test block, thereby facilitating the improvement of the accuracy of the test, and can also facilitate the testing of disc-shaped concrete test blocks of different sizes and square concrete test blocks of different sizes. Meanwhile, the testing machine only has a liquid collecting tank as a water receiving container and a drainage container, thereby not only saving costs, but also facilitating water recycling and being easy to operate:

[0037] 1. The square trough and the truncated tube can be sealed with the sides of the square concrete test block and the disc-shaped concrete test block respectively through the rubber gasket, so that water can be completely in contact with the surface of the concrete test block, so as to facilitate more accurate detection of the water seepage resistance of concrete. In addition, through the structural shape of the square trough and the truncated tube, the detection machine can detect disc-shaped concrete test blocks of different sizes and square concrete test blocks of different sizes;

[0038] 2. During the inspection, water is pumped from the liquid collecting tank, and after the pumping is completed, the water in the L-shaped observation tube and the hose can flow back into the liquid collecting tank, ensuring that the volume of water in the liquid collecting tank is relatively stable at the beginning of the inspection process, and after the water slowly penetrates the concrete surface, it will also drip into the liquid collecting tank, making the liquid collecting tank both a drainage container and a water receiving container, which can facilitate water recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0040] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure of point A;

[0041] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention;

[0042] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure of point B in the middle;

[0043] Figure 5 This is a schematic diagram of the main structure of the pneumatic water delivery mechanism of the present invention;

[0044] Figure 6 It is a schematic cross-sectional view of the pneumatic water delivery mechanism of the present invention;

[0045] Figure 7 For the present invention Figure 6 The schematic diagram of the enlarged structure of point C in the middle;

[0046] Figure 8 It is a structural schematic diagram of the square groove table, rubber gasket and truncated cone tube when they are separated in the present invention.

[0047] In the figure: 1. base; 2. liquid collecting tank; 3. L-shaped observation tube; 4. visual window; 5. hose; 6. spray plate; 7. air guide tube; 8. support rod; 9. mounting plate; 10. screw rod; 11. square groove platform; 12. rubber gasket; 13. twisted tube; 14. driving gear; 15. transmission gear; 16. twisted rod; 17. truncated tube; 18. sealing ring; 19. inner cavity; 20. spray hole; 21. piston assembly; 22. limit groove; 23. limit rod; 24. piston tube; 25. air hole; 26. follower gear. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] See also Figure 1-Figure 8 , the present invention provides a technical solution:

[0050] Embodiment 1: In order to solve the problem that the conventional concrete water seepage resistance testing machine is not convenient for improving the testing accuracy, the following technical solution is provided, specifically,

[0051] A concrete water seepage resistance testing machine comprises a base 1, a concrete support assembly, a pneumatic water delivery mechanism and a gear assembly. A liquid collecting tank 2 is fixedly mounted on the base 1, and the open end of the liquid collecting tank 2 is connected to the concrete support assembly.

[0052] The concrete support assembly includes a square trough 11, a rubber gasket 12 and a truncated cone tube 17. The inner side of the truncated cone tube 17 supports the square trough 11, and the inner side of the truncated cone tube 17 and the inner side of the square trough 11 are padded with rubber gaskets 12. The inner side of the truncated cone tube 17 and the outer side of the square trough 11 are mutually matching truncated cones, and the inner side of the square trough 11 is a quadrangular prism. The shape of the rubber gasket 12 is a quadrangular prism or a truncated cone, which is convenient for padding the inner side of the square trough 11 or the inner side of the truncated cone tube 17. The inner and outer diameters of the liquid collecting tank 2 are between the minimum outer diameter and the maximum outer diameter of the truncated cone tube 17.

[0053] When in use, the square groove table 11 and the round table tube 17 are used as needed;

[0054] If the concrete test block is a disc, only the truncated cone tube 17 is needed. If the concrete test block is a square, the truncated cone tube 17 can be placed on the outside of the square groove 11.

[0055] If the concrete block to be tested is a disc-shaped concrete block, a disc-shaped rubber gasket 12 is placed inside the truncated cone tube 17; if the concrete block to be tested is a square block, a quadrangular prism-shaped rubber gasket 12 is placed inside the square trough 11;

[0056] Then, a disc-shaped concrete test block is placed inside the truncated cone-shaped rubber gasket 12, or a square-shaped concrete test block is placed inside the quadrangular prism-shaped rubber gasket 12. At this time, through the detection of the concrete test block, the side of the concrete test block and the rubber gasket 12 can be sealed;

[0057] Then the truncated cone tube 17 is installed on the liquid collecting tank 2. At this time, during the test, the water can be in full contact with the surface of the concrete test block, thus preventing the water from overflowing from the side gaps of the concrete test block, which would cause inaccurate test results.

[0058] Embodiment 2: To solve the problem that the conventional concrete water seepage resistance testing machine is not convenient for water recycling, specifically,

[0059] A support rod 8 is connected to the upper surface of the base 1, and the upper lower end of the support rod 8 is coaxially fixedly connected to the upper surface of the mounting plate 9, a pneumatic water delivery mechanism is arranged between the lower surface of the mounting plate 9 and the side of the liquid collecting tank 2, and a spray plate 6 is connected to the pneumatic water delivery mechanism, an inner cavity 19 is arranged inside the spray plate 6, and the inner cavity 19 is connected to the lower surface of the spray plate 6 through a spray hole 20, the inner cavity 19 is an inverted flat cone, and the spray holes 20 are evenly distributed in the inner cavity 19, and a gear assembly is arranged between the pneumatic water delivery mechanism and the spray plate 6, and the gear assembly is used to drive the pneumatic water delivery mechanism to operate.

[0060] The pneumatic water delivery mechanism includes an L-shaped observation tube 3, a visual window 4, a hose 5, an air guide tube 7, a sealing ring 18, a piston assembly 21, a limit groove 22, a limit rod 23, a piston tube 24 and an air hole 25. The L-shaped observation tube 3 is connected to the lower end of the outer side of the liquid collecting tank 2, and the upper end of the outer side of the liquid collecting tank 2 is connected to the lower end of the air guide tube 7. The air guide tube 7 and the L-shaped observation tube 3 are arranged at a right angle, and the upper end of the L-shaped observation tube 3 is connected to the lower end of the hose 5. The upper end of the hose 5 is connected to the inner cavity 19. The piston tube 24 is coaxially installed on the lower surface of the mounting plate 9, and the piston tube 24 is connected to the upper end of the air guide tube 7. The piston tube 24 is provided with an air hole 25, and the lower end of the piston tube 24 is seamlessly slidably connected to the lower end of the piston assembly 21, the lower end of the piston assembly 21 is coaxially fixedly connected to the upper surface of the spraying disc 6, and the upper end of the piston assembly 21 is seamlessly slidably connected to the inner side of the piston tube 24, the upper end of the piston tube 24 is provided with a limiting groove 22, and the limiting groove 22 is movably connected to the limiting rod 23, and the upper end of the limiting rod 23 is coaxially fixedly connected to the lower surface of the mounting plate 9, the visual window 4 is provided on the L-shaped observation tube 3, the collecting tank 2 and the piston tube 24, and the visual window 4 is engraved with scales, and the sealing ring 18 is installed on the collecting tank 2. The height of the upper end of the liquid tank 2 and the lower end of the L-shaped observation tube 3 is lower than the height of the lower end of the air guide tube 7, and the height of the air hole 25 is higher than the height of the upper end of the air guide tube 7. The air guide tube 7, the L-shaped observation tube 3 and the inner side of the inner cavity 19 are all provided with a hydrophobic layer, and the inner side of the rubber gasket 12 is also provided with a hydrophobic layer. The gear assembly includes a screw rod 10, a twisted tube 13, a driving gear 14, a transmission gear 15, a twisted rod 16 and a follower gear 26. The two screw rods 10 are threadedly penetrated through the mounting plate 9, and the lower ends of the two screw rods 10 are respectively connected to the diagonal positions of the upper surface of the spray plate 6 by bearings, and the lower end of the screw rod 10 is keyed to the follower gear 2 6, and the two follower gears 26 are meshed with the transmission gear 15, the transmission gear 15 bearing is connected to the lower end of the piston assembly 21, and the transmission gear 15 is meshed with the driving gear 14, the driving gear 14 is keyed to the outside of the twisted tube 13, and the lower end bearing of the twisted tube 13 is connected to the upper surface of the spray plate 6, the spray plate 6 is movably penetrated by a twisted rod 16, and the twisted rod 16 thread is arranged to penetrate the twisted tube 13, and the upper end of the twisted rod 16 is movably penetrated to the top of the mounting plate 9, the inner side of the twisted tube 13 and the outer side of the twisted rod 16 are mutually matching twisted threads, and a pull ring is arranged at the lower end of the twisted rod 16.

[0061] When in use, the pull ring is pulled to move the twisted rod 16 downward, thereby driving the twisted tube 13 to rotate, causing the driving gear 14 to rotate, and the follower gear 26 drives the screw 10 to rotate through the transmission gear 15, thereby causing the spraying disc 6 and the piston assembly 21 to move downward. The movement of the piston assembly 21 can squeeze the gas in the piston tube 24, so that the gas enters the liquid collecting tank 2 through the air guide pipe 7, thereby increasing the air pressure in the liquid collecting tank 2, so that the water in the liquid collecting tank 2 is transported to the inner cavity 19 through the L-shaped observation tube 3 and the hose 5, and is discharged from the spray hole 2. 0 is sprayed onto the surface of the concrete test block. When the piston assembly 21 continues to move downward to connect the air guide tube 7 with the air hole 25, the water in the L-shaped observation tube 3 and the hose 5 will flow back into the liquid collecting tank 2. Through the principle of communicating vessels, the liquid levels in the liquid collecting tank 2 and the L-shaped observation tube 3 can be read through the visual window 4. After a period of time, the water penetrates the concrete test block and drips into the liquid collecting tank 2. The liquid levels in the liquid collecting tank 2 and the L-shaped observation tube 3 will change, so that the anti-water seepage performance of the concrete can be calculated through the difference in the front and rear liquid levels.

[0062] A method for testing the water seepage resistance of concrete, the method comprising:

[0063] Step 1: first inject a certain amount of water into the liquid collecting tank 2, and then select different concrete support components according to needs. For example, if a square concrete test block needs to be tested, the square trough 11 needs to be sleeved into the truncated tube 17, and the quadrangular prism-shaped rubber gasket 12 needs to be sleeved on the inner side of the square trough 11, and then the square concrete test block needs to be placed on the inner side of the rubber gasket 12;

[0064] If a disc-shaped concrete test block needs to be tested, it is only necessary to put the truncated cone-shaped rubber gasket 12 into the truncated cone tube 17, and place the disc-shaped concrete test block inside the corresponding rubber gasket 12;

[0065] Step 2: Install the truncated cone tube 17 at the upper opening of the liquid collecting tank 2, squeeze and seal the outer side of the truncated cone tube 17 with the sealing ring 18, and seal the truncated cone tube 17 or the square trough 11 with the concrete test block with the rubber gasket 12, so that a closed space is formed in the liquid collecting tank 2;

[0066] Step 3: Pull the pull ring to move the twisted rod 16 downward a short distance relative to the twisted tube 13, so that the twisted tube 13 can drive the driving gear 14 to rotate, and then drive the screw rod 10 to rotate through the transmission gear 15 and the follower gear 26, and the rotation of the screw rod 10 makes the spraying disc 6 move downward, so that the spraying disc 6 is close to the concrete test block;

[0067] At the same time, the piston assembly 21 moves downward relative to the piston tube 24, thereby squeezing the gas in the piston tube 24, so that the gas enters the liquid collecting tank 2 through the air guide tube 7, thereby increasing the air pressure in the liquid collecting tank 2, so that the water in the liquid collecting tank 2 can be pressed into the L-shaped observation tube 3. The liquid level in the L-shaped observation tube 3 and the liquid collecting tank 2 and the position of the upper end of the piston assembly 21 in the piston tube 24 are observed through the visual window 4 to detect whether the liquid collecting tank 2 is completely sealed. If the scales are inconsistent, it proves that the sealing ring 18 is severely worn and needs to be replaced.

[0068] Step 4: Continue to pull the pull ring, and through the process of step 3, the water in the liquid collecting tank 2 passes through the L-shaped observation tube 3 and the hose 5, enters the inner cavity 19, and is sprayed toward the concrete test block from the spray hole 20 until the air hole 25 and the air guide tube 7 are connected;

[0069] At this time, under the action of atmospheric pressure, the liquid levels of the liquid collecting tank 2 and the L-shaped observation tube 3 will be at the same position, and the liquid level height at this time is recorded;

[0070] Wait for a while, observe the liquid levels in the liquid collecting tank 2 and the L-shaped observation tube 3, and then derive the water permeability of the concrete based on the liquid level.

[0071] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0072] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A concrete water seepage resistance testing machine, comprising a base (1), a concrete support assembly, a pneumatic water delivery mechanism and a gear assembly, characterized in that: A liquid collecting tank (2) is fixedly mounted on the base (1), and the open end of the liquid collecting tank (2) is connected to a concrete support assembly. A support rod (8) is connected to the upper surface of the base (1), and the lower end of the upper part of the support rod (8) is coaxially fixedly connected to the upper surface of the mounting plate (9). A pneumatic water delivery mechanism is provided between the lower surface of the mounting plate (9) and the side surface of the liquid collecting tank (2), and a spray plate (6) is connected to the pneumatic water delivery mechanism. The pneumatic water delivery mechanism comprises an L-shaped observation tube (3), a visual window (4), a hose (5), an air guide tube (7), a sealing ring (18), a piston assembly (21), a limit groove (22), a limit rod (23), a piston tube (24) and an air hole (25). The L-shaped observation tube (3) is connected to the liquid collecting tank (2). The lower end of the outer side of the liquid tank (2), and the upper end of the outer side of the liquid collecting tank (2) is connected to the lower end of the air guide tube (7), the air guide tube (7) and the L-shaped observation tube (3) are arranged at a right angle, and the upper end of the L-shaped observation tube (3) is connected to the lower end of the hose (5), and the upper end of the hose (5) is connected to the inner cavity (19), the lower surface of the mounting plate (9) is coaxially mounted with a piston tube (24), and the piston tube (24) is connected to the upper end of the air guide tube (7), the piston tube (24) is provided with an air hole (25), and the lower end of the piston tube (24) is seamlessly slidably connected to the lower end of the piston assembly (21), the lower end of the piston assembly (21) is coaxially fixedly connected to the upper surface of the spraying plate (6), and the piston assembly (21) ) is seamlessly slidably connected to the inner side of the piston tube (24), the upper end of the piston tube (24) is provided with a limit groove (22), and a limit rod (23) is movably connected in the limit groove (22), and the upper end of the limit rod (23) is coaxially fixedly connected to the lower surface of the mounting plate (9), the visual window (4) is provided on the L-shaped observation tube (3), the liquid collecting tank (2) and the piston tube (24), and the visual window (4) is engraved with scales, the sealing ring (18) is installed at the upper end of the liquid collecting tank (2), the spraying plate (6) is provided with an inner cavity (19), and the inner cavity (19) is connected to the lower surface of the spraying plate (6) through a spraying hole (20), the inner cavity (19) is an inverted flat cone, and the spraying hole (20) ) are evenly distributed in the inner cavity (19), a gear assembly is arranged between the pneumatic water delivery mechanism and the spraying disc (6), and the gear assembly is used to drive the pneumatic water delivery mechanism to operate. The gear assembly comprises a screw rod (10), a twisted tube (13), a driving gear (14), a transmission gear (15), a twisted rod (16) and a follower gear (26), two of the screw rods (10) are threadedly penetrated through the mounting disc (9), and the lower ends of the two screw rods (10) are respectively bearing-connected to the diagonal positions of the upper surface of the spraying disc (6), the lower ends of the screw rods (10) are key-connected to the follower gear (26), and the two follower gears (26) are meshingly connected to the transmission gear (15), and the transmission gear (15) is bearing-connected to the lower end of the piston assembly (21),The transmission gear (15) is meshedly connected with the driving gear (14), the driving gear (14) is key-connected to the outside of the twisted tube (13), and the lower end bearing of the twisted tube (13) is connected to the upper surface of the spraying disc (6), the spraying disc (6) is movably penetrated by a twisted rod (16), and the twisted rod (16) is threadedly penetrated through the twisted tube (13), and the upper end of the twisted rod (16) is movably penetrated to the top of the mounting disc (9), the inner side of the twisted tube (13) and the outer side of the twisted rod (16) are mutually matching twisted threads, and a pull ring is provided at the lower end of the twisted rod (16).

2. A concrete water seepage resistance testing machine according to claim 1, characterized in that: The concrete support assembly comprises a square trough (11), a rubber gasket (12) and a truncated cone tube (17); the inner side of the truncated cone tube (17) supports the square trough (11), and the inner side of the truncated cone tube (17) and the inner side of the square trough (11) are both padded with rubber gaskets (12).

3. A concrete water seepage resistance testing machine according to claim 2, characterized in that: The inner side of the truncated cone tube (17) and the outer side of the square trough (11) are truncated cones that match each other, and the inner side of the square trough (11) is a quadrangular prism.

4. A concrete water seepage resistance testing machine according to claim 3, characterized in that: The rubber gasket (12) is in the shape of a quadrangular prism or a truncated cone, and is convenient for padding the inner side of the square groove platform (11) or the inner side of the truncated cone tube (17).

5. A concrete water seepage resistance testing machine according to claim 4, characterized in that: The inner and outer diameters of the liquid collecting tank (2) are both between the minimum outer diameter and the maximum outer diameter of the truncated cone tube (17).

6. A concrete water seepage resistance testing machine according to claim 5, characterized in that: The height of the lower end of the L-shaped observation tube (3) is lower than the height of the lower end of the air guide tube (7), and the height of the air hole (25) is higher than the height of the upper end of the air guide tube (7).

7. A concrete water seepage resistance testing machine according to claim 6, characterized in that: The inner sides of the air guide tube (7), the L-shaped observation tube (3) and the inner cavity (19) are all provided with a hydrophobic layer, and the inner side of the rubber gasket (12) is also provided with a hydrophobic layer.

8. The detection method of the detection machine according to claim 2, characterized in that: The method comprises: Step 1: first, a certain amount of water is injected into the liquid collecting tank (2), and then different concrete support components are selected according to the needs. For example, if a square concrete test block needs to be tested, the square trough (11) needs to be placed in the truncated tube (17), and the quadrangular prism-shaped rubber gasket (12) needs to be placed on the inner side of the square trough (11), and then the square concrete test block is placed on the inner side of the rubber gasket (12); If a disc-shaped concrete test block needs to be tested, it is only necessary to insert the truncated cone-shaped rubber gasket (12) into the truncated cone tube (17), and place the disc-shaped concrete test block inside the corresponding rubber gasket (12); Step 2: Install the truncated cone tube (17) at the upper opening of the liquid collecting tank (2), squeeze and seal the outer side of the truncated cone tube (17) with the sealing ring (18), and seal the truncated cone tube (17) or the square trough (11) with the concrete test block with the rubber gasket (12), so that a closed space is formed in the liquid collecting tank (2); Step 3: Pull the pull ring to move the twisted rod (16) downward a short distance relative to the twisted tube (13), thereby causing the twisted tube (13) to drive the driving gear (14) to rotate, and then drive the screw rod (10) to rotate through the transmission gear (15) and the follower gear (26), and the rotation of the screw rod (10) causes the spraying disc (6) to move downward, thereby causing the spraying disc (6) to approach the concrete test block; At the same time, the piston assembly (21) moves downward relative to the piston tube (24), thereby squeezing the gas in the piston tube (24), so that the gas enters the liquid collecting tank (2) through the air guide tube (7), thereby increasing the gas pressure in the liquid collecting tank (2), so that the water in the liquid collecting tank (2) can be pressed into the L-shaped observation tube (3). The liquid level in the L-shaped observation tube (3) and the liquid collecting tank (2) and the position of the upper end of the piston assembly (21) in the piston tube (24) are observed through the visual window (4) to detect whether the liquid collecting tank (2) is completely sealed. If the scales are inconsistent, it is proved that the sealing ring (18) is seriously worn and needs to be replaced. Step 4: Continue to pull the pull ring, and through the process of step 3, the water in the liquid collecting tank (2) passes through the L-shaped observation tube (3) and the hose (5), enters the inner cavity (19), and is sprayed from the spray hole (20) toward the concrete test block until the air hole (25) and the air guide tube (7) are connected; At this time, under the action of atmospheric pressure, the liquid levels in the liquid collecting tank (2) and the L-shaped observation tube (3) will be at the same position, and the liquid level at this time is recorded; After waiting for a certain period of time, the liquid levels of the water in the liquid collecting tank (2) and the L-shaped observation tube (3) are observed, and then the water permeability of the concrete is obtained based on the liquid level heights.

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