Concrete impermeability detection system and detection method

Abstract

The invention relates to a concrete anti-permeability performance detection system, and belongs to the technical field of concrete anti-permeability performance detection.The concrete anti-permeability performance detection system comprises a detection base, a hydraulic cylinder is installed in the detection base, a piston rod of the hydraulic cylinder is sleeved with a plurality of base plates and a plurality of pressing plates, clamping assemblies are arranged on the pressing plates, and a plurality of sealing seats are arranged on the base plates; a supporting table is arranged in the sealing seat, a plurality of sealing covers are arranged on the pressure plate, pressurized water can be introduced into the supporting table and acts on the bottom of the test block, a sealing assembly is arranged on each sealing cover, and a detection electrode is arranged at the top of each sealing cover; a cold and hot water circulation assembly is arranged in the detection base, a cold air supply assembly is arranged on at least one base plate, a hot air supply assembly is arranged on at least one base plate, and a corrosive water supply assembly is arranged on at least one base plate. The device has the advantages that when the permeability of a plurality of concrete samples is detected, various environment simulation conditions can be provided, and the accuracy of experimental results is sequentially improved.

Description

Technical Field

[0001] The present application relates to the technical field of concrete anti-seepage performance detection, and in particular to a concrete anti-seepage performance detection system and detection method. Background Art

[0002] Existing concrete permeability testing equipment is usually equipped with a concrete permeability testing room, or multiple concrete permeability testing rooms are arranged side by side on a workbench, and a concrete sample is placed in each concrete permeability testing room for testing, and the degree of automation of the test is low. Moreover, when testing the concrete permeability performance, the concrete sample needs to be placed in a pressurized water environment for a long time to test the water penetration in the concrete sample. When multiple concrete samples need to be tested, a long test waiting time is required, which affects the timeliness of the concrete permeability performance test. Or more testing equipment is needed for testing, which increases the equipment purchase cost and occupies more testing space; In order to solve the above problems, publication number: CN115266537A discloses a fully automatic concrete impermeability detection system, but the equipment cannot fully simulate complex environments. It operates under single pressure and water flow conditions, and it is difficult to simulate the complex environment of concrete in actual working conditions, such as the influence of multiple factors such as temperature changes and chemical erosion on the concrete's impermeability performance, which will lead to inaccurate experimental results. Summary of the invention

[0003] In order to provide a variety of environmental simulation conditions when conducting permeability testing on multiple concrete samples and improve the accuracy of experimental results, the present application provides a concrete anti-permeability testing system and method.

[0004] The present application provides a concrete anti-permeability performance testing system that adopts the following technical solutions: A concrete anti-seepage performance testing system, comprising a testing base, a hydraulic cylinder is installed in the testing base, a plurality of chassis and a plurality of pressure plates are sleeved on the piston rod of the hydraulic cylinder, the chassis and the pressure plates are spaced apart, the pressure plates are fixedly connected to the chassis above and adjacent to each other, a clamping assembly is arranged on the pressure plate, the clamping assembly is used to connect the pressure plate with the piston rod of the hydraulic rod, a plurality of sealing seats are arranged on the chassis, a supporting platform for placing a test block is arranged in the sealing seat, a plurality of sealing covers are arranged on the pressure plate, the sealing covers correspond to the sealing seats one by one, the supporting platform can be passed with pressurized water and act on the bottom of the test block, a sealing assembly for sealing the peripheral surface of the test block is arranged on the sealing cover, and a detection electrode is arranged on the top of the sealing cover; When the sealing assembly is closed and the sealing cover is covered on the corresponding sealing seat, the sealing cover, the test block and the sealing seat together enclose a conditional test chamber; A hot and cold water circulation component is arranged in the detection base, and the hot and cold water circulation component can supply cold water and hot water to multiple condition test chambers adjacent to the detection base. At least one of the chassis is provided with a cold air supply component for providing cold air to the condition test chambers on the same layer, at least one of the chassis is provided with a hot air supply component for providing hot air to the condition test chambers on the same layer, and at least one of the chassis is provided with a corrosive water supply component for providing corrosive water to the condition test chambers on the same layer.

[0005] By adopting the above technical scheme, the test blocks are divided into four groups, and the four groups of test blocks are respectively placed on the sealing seats between each chassis, and the pressure plate is controlled to be buckled on the corresponding chassis so that the sealing cover is covered on the corresponding sealing seat, and then the hot and cold water circulation component, the cold air supply component, the hot air supply component and the corrosive water supply component are turned on at the same time. The hot and cold water circulation component provides an alternating cold and hot temperature circulation environment for a group of test blocks between the chassis and the pressure plate, the cold air supply component provides a low temperature environment for a group of test blocks between the chassis and the pressure plate, the hot air supply component provides a high temperature environment for a group of test blocks between the chassis and the pressure plate, and the corrosive water supply component provides a corrosive water immersion environment for a group of test blocks between the chassis and the pressure plate.

[0006] Then move the control pressure plate away from the corresponding chassis to discharge the cold air / hot air / corrosive water / cold water / hot water between the sealing seat and the sealing cover. Then move the pressure plate close to the chassis and open the sealing assembly to carry out the pressure test.

[0007] When conducting permeability testing on multiple concrete samples, a variety of environmental simulation conditions can be provided to more comprehensively evaluate the anti-permeability performance of concrete in different environments, thereby improving the accuracy of the test results and saving experimental time.

[0008] Optionally, the sealing assembly includes a sealing ring sleeve, the sealing ring sleeve is arranged around the inner wall of the sealing cover, the sealing ring sleeve and the inner wall of the sealing cover together enclose a pressurized water cavity, the sealing cover is provided with a first water injection channel connected to the pressurized water cavity, the pressure plate is provided with a first water tank and a first pressurizing pump, and the first pressurizing pump is connected to the first water injection channel; The top of the sealing cover is provided with a connecting pipe connected to the condition test chamber, and the connecting pipe is used to inject water / gas corresponding to the test conditions into the condition test chamber; The sealing seat is provided with a drain pipe. When the sealing cover is pressed onto the sealing seat, the drain pipe is separated from the conditional test chamber. When the sealing cover is released from contact with the bottom of the sealing seat, the drain pipe is connected to the conditional test chamber. The support seat is provided with a pressurized water pipe.

[0009] By adopting the above technical solution, when simulating environmental conditions, the sealing cover is placed on the sealing seat, and the bottom of the sealing cover blocks the drain pipe, the pressurized water chamber is not filled with water, the conditional test chamber is in an open state, and then the water is discharged into the conditional test chamber through the connecting pipe to perform environmental simulation; After the environmental simulation is completed, the sealing cover is controlled to be away from the sealing seat. At this time, the sealing cover is away from the drain pipe, and the conditional test chamber is connected with the drain pipe, so that the environmental simulated water / air can be discharged from the conditional test chamber; Then put the sealing cover back on the sealing seat, and let water flow into the pressurized water chamber to make the sealing ring press against the circumference of the test block. Then, discharge high-pressure water through the pressurized water pipe and act on the bottom of the test block. The anti-seepage performance of the test block is judged by the detection electrode.

[0010] Optionally, the clamping assembly includes a cylinder, which is installed on the side of the pressure plate away from the sealing cover, and the cylinder is connected to a claw. A plurality of clamping grooves are provided on the piston rod of the hydraulic cylinder, and the clamping grooves correspond to the clamping claws one by one. The clamping claws can be inserted into the corresponding clamping grooves.

[0011] By adopting the above technical solution, the cylinder drives the claw to engage in the engaging groove, so that the pressure plate and the piston rod move synchronously. Therefore, when a pressure plate needs to be separated from the corresponding chassis, it is only necessary to start the claw on the pressure plate to enter the engaging groove and start the motor.

[0012] Optionally, the hot and cold water circulation component includes a chiller and a heater, and the chiller and the heater are both installed in the detection base, the sealing cover adjacent to the detection base is connected to a first three-way pipe, and the sealing seat adjacent to the detection base is connected to a second three-way pipe, the two water inlet ends of the first three-way pipe are respectively connected to the chiller and the heater, the water outlet end of the first three-way pipe is connected to the connecting pipe, the two drainage ends of the second three-way pipe are respectively connected to the chiller and the heater, the water inlet end of the second three-way pipe is connected to the drainage pipe, and the two water inlet ends of the first three-way pipe and the two drainage ends of the second three-way pipe are both provided with solenoid valves.

[0013] By adopting the above technical solution, cold and hot water are generated by using a chiller and a heater, and by controlling the corresponding solenoid valves, the pump body in the chiller and the pump body of the heater, circulating and alternating cold and hot water can be injected into the conditional test chamber.

[0014] Optionally, the cold air supply assembly includes a vortex tube, which is installed on a side of the pressure plate away from the sealing cover, an air intake end of the vortex tube is connected to an air pressure pump, and a cold air discharge end of the vortex tube is connected to the connecting pipe.

[0015] By adopting the above technical solution, the cold air discharged from one end of the vortex tube can be directly introduced into the conditioned test chamber to provide a low-temperature test environment for the test block.

[0016] Optionally, two adjacent pressure plates are respectively provided with the cold air supply assembly and the hot air supply assembly, and the hot air supply assembly includes a telescopic pipe, one end of which is connected to the connecting pipe, and the telescopic pipe passes through the pressure plate and the corresponding chassis, and is connected to the hot air discharge end of the vortex tube on the other pressure plate.

[0017] By adopting the above technical solution, the vortex tube can provide a low-temperature test environment for one group of test blocks and a high-temperature test environment for another group of test blocks at the same time.

[0018] Optionally, the corrosive water supply assembly includes a first conditional water tank, a second conditional water tank and a third conditional water tank, the first conditional water tank, the second conditional water tank and the third conditional water tank are all installed on the side of the pressure plate away from the sealing cover, the several sealing covers on one pressure plate are divided into three groups, the connecting pipes of one group of sealing covers are connected to the first conditional water tank, the connecting pipes of one group of sealing covers are connected to the second conditional water tank, and the connecting pipes of one group of sealing covers are connected to the third conditional water tank, the first conditional water tank, the second conditional water tank and the third conditional water tank are all connected to a water supply pump and a water pump, the water supply pump is used to supply water into the conditional test chamber, and the water pump is used to pump water out of the conditional test chamber.

[0019] By adopting the above technical solution, the water supply pump discharges the water from the first condition water tank / the second condition water tank / the third condition water tank into the condition test chamber to provide a test environment with different corrosion conditions. When draining water, the pump is started to pump the corrosive water in the condition test chamber back into the first condition water tank / the second condition water tank / the third condition water tank, so that the corrosive water can be reused.

[0020] Optionally, a locking drive disk is coaxially arranged on the chassis, a first guide groove is formed on the locking drive disk, a locking seat is provided on the side of the chassis facing the support platform, a fixing sleeve is installed on the locking seat, a locking rod is passed through the fixing sleeve, one end of the locking rod is slidably arranged in the first guide groove, a locking block is provided on the pressure plate, and a driving member for driving the locking drive disk to rotate is provided on the chassis, when the pressure plate is buckled on the chassis, the locking block is opposite to the locking seat, and the driving member drives the locking drive disk to rotate, so that the locking rod passes through the locking seat and the locking block.

[0021] By adopting the above technical solution, the driving member drives the locking driving plate to rotate, and the locking rod passes through the locking seat and the locking block, so that the pressure plate and the chassis are in a clamped state during the experiment. This can reduce the impact of other pressure plates on the chassis and pressure plates being tested when they are lifted or lowered.

[0022] Optionally, the driving member includes a driving cylinder, which is hinged on a side of the chassis away from the support platform, and a second guide groove is provided on the chassis. The locking driving disk is provided with a fixing hole, and the fixing hole corresponds to the second guide groove. The piston rod of the driving cylinder is vertically connected to a rolling column, and the rolling column passes through the second guide groove and is fixed to the fixing hole.

[0023] The present application also provides a method for testing the anti-permeability of concrete using the following technical solution: A method for detecting the impermeability of concrete, applied to the above-mentioned system for detecting the impermeability of concrete, comprises the following steps: S1: Preparation of concrete standard test blocks; S1.1: Select concrete test pieces with standard dimensions; S1.2: Divide the test blocks into four groups, which are used for testing the anti-seepage performance in cold and hot water circulation exchange, cold air, hot air, and corrosive water environments respectively; S2, four groups of anti-seepage experiments were carried out in parallel; Hot and cold water exchange group; The first set of concrete test blocks are placed in a sealed chamber; Set the hot and cold water to cycle alternately. The specific conditions are cold water at 5°C±2°C for 4 hours; then switch to hot water at 60°C±2°C for 4 hours. The hot and cold air cycle should be no less than 72 hours. After the water circulation is completed, the anti-seepage performance test is carried out, and the pressure is gradually increased. The initial pressure is 0.2 MPa, and the pressure is increased by 0.1 MPa every 4-5 hours until the test block seeps water, and the maximum anti-seepage pressure value is recorded; Cold air condition test group Place the second set of concrete test blocks in a cold air environment at 5°C±2°C for no less than 72 hours; Exhaust the cold air and conduct anti-seepage performance test. Gradually increase the pressure, starting at 0.2 MPa, and increase the pressure by 0.1 MPa every 4-5 hours until water seepage occurs in the test block. Record the maximum anti-seepage pressure value; Hot air condition test group The third group of concrete test blocks are placed in a hot air environment at 60°C±2°C for no less than 72 hours; Exhaust the hot air and conduct anti-seepage performance test. Gradually increase the pressure, starting at 0.2 MPa, and increase the pressure by 0.1 MPa every 4-5 hours until water seepage occurs in the test block. Record the maximum anti-seepage pressure value; Corrosive water immersion group The fourth group of concrete test blocks are placed in an aqueous solution rich in corrosive ions; the immersion time is maintained for no less than 72 hours; Drain the corrosive water; conduct anti-seepage performance test, gradually increase the pressure, the initial pressure is 0.2 MPa, increase the pressure by 0.1 MPa every 4-5 hours, until the test block seeps water, and record the maximum anti-seepage pressure value; S3, comparison and analysis of results; S3.1. Calculate the average anti-seepage pressure of each group based on the maximum anti-seepage pressure values ​​of the four groups of tests; S3.2. Compare the impermeability of the four groups of test blocks under different treatment conditions, and analyze the effects of cold water, hot water, alternating hot and cold air, and corrosive water on the impermeability of concrete.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. When testing the permeability of multiple concrete samples, it can also provide a variety of environmental simulation conditions, which can more comprehensively evaluate the anti-permeability performance of concrete in different environments, thereby improving the accuracy of the test results and saving test time; 2. The driving member drives the locking driving plate to rotate, and the locking rod passes through the locking seat and the locking block, so that the pressure plate and the chassis are in a clamped state during the experiment. This can reduce the impact of other pressure plates on the chassis and pressure plates being tested when they are lifted or lowered. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0026] Figure 2 It is a structural schematic diagram of a hydraulic cylinder used in an embodiment of the present application.

[0027] Figure 3It is a schematic diagram of the structure of the sealing cover and the sealing seat according to the embodiment of the present application.

[0028] Figure 4 It is a schematic diagram of the structure of the clamping assembly and the cold air supply assembly used to embody the embodiment of the present application.

[0029] Figure 5 It is a schematic diagram of the structure of the card slot used to reflect the embodiment of the present application.

[0030] Figure 6 It is a schematic diagram of the structure of the locking drive disk used in the embodiment of the present application.

[0031] Figure 7 It is a schematic diagram of the structure of the driving member used to embody the embodiment of the present application.

[0032] Figure 8 It is a schematic diagram of the structure of the hot and cold water circulation components used in the embodiment of the present application.

[0033] Fig. 9 It is a structural schematic diagram of a hot air supply component used to embody an embodiment of the present application.

[0034] Fig.10 It is a schematic structural diagram of a corrosive water supply component used in an embodiment of the present application.

[0035] Description of the accompanying drawings: 1. Detection base; 11. Hydraulic cylinder; 111. Clamping groove; 12. Guide rod; 13. Top cover; 2. Hot and cold water circulation assembly; 21. Chiller; 22. Heater; 23. First three-way pipe; 24. Second three-way pipe; 25. Solenoid valve; 3. Chassis; 31. Locking drive plate; 311. First guide groove; 32. Locking seat; 33. Fixed sleeve; 34. Locking rod; 35. Driving member; 351. Driving cylinder; 36. Second guide groove; 37. Rolling column; 4. Pressure plate; 41. First water tank; 42. First pressure pump; 43. Second water tank; 44. Second pressure pump; 45. Locking block; 5 1. Sealing seat; 52. Support table; 53. Sealing cover; 54. Detection electrode; 55. Condition test chamber; 56. Connecting pipe; 57. Drain pipe; 58. Pressurized water pipe; 6. Sealing assembly; 61. Sealing ring; 62. Pressurized water chamber; 63. First water injection channel; 7. Clamping assembly; 71. Cylinder; 72. Claw; 81. Cold air supply assembly; 811. Vortex tube; 812. Air booster pump; 82. Hot air supply assembly; 821. Telescopic tube; 9. Corrosive water supply assembly; 91. First condition water tank; 92. Second condition water tank; 93. Third condition water tank; 94. Water pump; 95. Water supply pump. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-10 This application is described in further detail.

[0037] The embodiment of the present application discloses a system for detecting the anti-permeability performance of concrete.

[0038] like Figure 1 and Figure 2 The concrete anti-seepage performance testing system includes a testing base 1, in which a hydraulic cylinder 11 and a hot and cold water circulation component 2 are installed. The piston rod of the hydraulic cylinder 11 extends from the center of the testing base 1. The testing base 1 is connected with a plurality of guide rods 12 around the piston rod of the hydraulic cylinder 11, and a top cover 13 is connected to the plurality of guide rods 12. The piston rod of the hydraulic cylinder 11 is slidably connected to the top cover 13.

[0039] The guide rod 12 and the piston rod are jointly sleeved with four chassis 3 and four pressure plates 4, and the chassis 3 and the pressure plates 4 are arranged at intervals. From the detection base 1 to the top cover 13, the four chassis 3 are respectively defined as the first chassis 3, the second chassis 3, the third chassis 3 and the fourth chassis 3, and the four pressure plates 4 are respectively defined as the first pressure plate 4, the second pressure plate 4, the third pressure plate 4 and the fourth pressure plate 4.

[0040] The first chassis 3 is fixed to the detection base 1, the first pressure plate 4 is located above the first chassis 3, the first pressure plate 4 is fixed to the second chassis 3 by a plurality of fixing columns, and an installation space is left inside the first pressure plate 4 and the second chassis 3. Similarly, the second pressure plate 4 is fixed to the third chassis 3, the third pressure plate 4 is fixed to the fourth chassis 3, and the fourth pressure plate 4 is opposite to the top cover 13.

[0041] like Figure 3 and Figure 4 All the pressure plates 4 are provided with a plurality of sealing seats 51 around the piston rod of the hydraulic cylinder 11, and each sealing seat 51 is coaxially installed with a support platform 52. All the pressure plates 4 are provided with a plurality of sealing covers 53 around the piston rod of the hydraulic cylinder 11. The sealing seat 51 of the first chassis 3 corresponds one-to-one to the sealing cover 53 of the first pressure plate 4, the sealing seat 51 of the second chassis 3 corresponds one-to-one to the sealing cover 53 of the second pressure plate 4, the sealing seat 51 of the third chassis 3 corresponds one-to-one to the sealing cover 53 of the third pressure plate 4, and the sealing seat 51 of the fourth chassis 3 corresponds one-to-one to the sealing cover 53 of the fourth pressure plate 4.

[0042] A sealing assembly 6 for sealing the peripheral surface of the test block is arranged in the sealing cover 53, and a detection electrode 54 is arranged on the top of the sealing cover 53. The sealing assembly 6 includes a sealing ring 61, which is arranged around the inner wall of the sealing cover 53. The sealing ring 61 and the inner wall of the sealing cover 53 jointly enclose a pressurized water cavity 62. A first water injection channel 63 communicating with the pressurized water cavity 62 is opened on the sealing cover 53, and the first water injection channel 63 extends from one side of the sealing cover 53. The top surface of the pressure plate 4 is installed with a first water tank 41 and a first pressure pump 42, and the first pressure pump 42 is connected to the first water injection channel 63 of the corresponding chassis 3 through a hose.

[0043] When the pressurized water chamber 62 is not flowing with water and the sealing cover 53 is covered on the corresponding sealing seat 51, the sealing cover 53, the test block and the sealing seat 51 together enclose a conditional test chamber 55; A connecting pipe 56 connected to the condition test chamber 55 is provided on the top of the sealing cover 53. The connecting pipe 56 is used to inject water / gas corresponding to the test conditions into the condition test chamber 55. The sealing seat 51 is provided with a drain pipe 57. When the sealing cover 53 is pressed on the sealing seat 51, the drain pipe 57 is separated from the condition test chamber 55. When the sealing cover 53 is no longer in contact with the bottom of the sealing seat 51, the drain pipe 57 is connected to the condition test chamber 55. The support platform 52 is provided with a pressurized water pipe 58. The tops of the first pressure plate 4, the second pressure plate 4 and the third pressure plate 4 are all equipped with a second water tank 43 and a second pressure pump 44. The second pressure pump 44 is connected to the pressurized water pipe 58 above the pressure plate 4 through a hose. The pressurized water pipe 58 of the support platform 52 on the first chassis 3 is directly supplied with water by the pipeline provided in the detection base 1.

[0044] like Figure 4 and Figure 5 A clamping assembly 7 is installed on the top of the pressure plate 4. The clamping assembly 7 is used to connect the pressure plate 4 with the piston rod of the hydraulic cylinder 11. The clamping assembly 7 includes a cylinder 71. The cylinder 71 is installed on the top of the pressure plate 4. The cylinder 71 is connected to a claw 72. Four clamping grooves 111 are opened on the piston rod of the hydraulic cylinder 11. The clamping grooves 111 correspond to the claws 72 one by one, and the claws 72 can be inserted into the corresponding clamping grooves 111.

[0045] like Figure 6 and Figure 7A locking drive disk 31 is coaxially rotated on the top surface of the chassis 3, and the locking drive disk 31 is also sleeved on the piston rod of the hydraulic cylinder 11. A plurality of first guide grooves 311 are opened on the locking drive disk 31 around the piston rod of the hydraulic cylinder 11. The first guide groove 311 is an arc groove. A plurality of locking seats 32 are installed on the top surface of the chassis 3. A fixing sleeve 33 is installed on the locking seat 32. A locking rod 34 is passed through the fixing sleeve 33. The locking rod 34 corresponds to the first guide groove 311 one by one. One end of the locking rod 34 is slidably arranged in the first guide groove 311. A plurality of locking blocks 45 are arranged on the pressure plate 4, and the locking blocks 45 correspond to the locking seats 32 one by one. The chassis 3 is provided with a driving member 35 for driving the locking drive disk 31 to rotate. When the pressure plate 4 is buckled on the chassis 3, the locking block 45 is opposite to the locking seat 32, and the driving member 35 drives the locking drive disk 31 to rotate, so that the locking rod 34 passes through the locking seat 32 and the locking block 45.

[0046] The driving member 35 includes a driving cylinder 351, which is hinged to the bottom surface of the chassis 3. The bottom surface of the chassis 3 is provided with a second guide groove 36. The piston rod of the driving cylinder 351 is vertically connected to a rolling column 37. The rolling column 37 rolls along the second guide groove 36 and is hinged to the chassis 3.

[0047] like Figure 8 The hot and cold water circulation assembly 2 includes a chiller 21 and a heater 22, both of which are installed in the detection base 1. In the embodiment of the present application, the chiller 21 includes a heat exchanger, a cold water tank, an infusion pump body and a return pump body, and the heater 22 includes an electric heating water tank and an infusion pump body and a return pump body. The sealing cover 53 of the first pressure plate 4 is connected to the first three-way pipe 23, and the sealing seat 51 of the first chassis 3 is connected to the second three-way pipe 24. The two ends of the first three-way pipe 23 The water inlet ends are connected to the infusion pump body of the chiller 21 and the infusion pump body of the heater 22 through hoses, the water outlet end of the first three-way pipe 23 is connected to the connecting pipe 56, and the two drainage ends of the second three-way pipe 24 are connected to the return liquid pump body of the chiller 21 and the return liquid pump body of the heater 22 through hoses, and the water inlet end of the second three-way pipe 24 is connected to the drainage pipe 57. The two water inlet ends of the first three-way pipe 23 and the two drainage ends of the second three-way pipe 24 are both provided with solenoid valves 25.

[0048] like Figure 4 , and also includes a cold air supply component 81, which includes a vortex tube 811. The vortex tube 811 is installed on the top surface of the second pressure plate 4. The air inlet end of the vortex tube 811 is connected to an air booster pump 812, and the cold air discharge end of the vortex tube 811 is connected to the connecting pipe 56 of the sealing cover 53 on the second pressure plate 4 through a hose.

[0049] like Fig. 9, and also includes a hot air supply component 82, the hot air supply component 82 includes a telescopic pipe 821, the telescopic pipe 821 passes through the third pressure plate 4 and is fixed to the third pressure plate 4, the telescopic pipe 821 is connected to the connecting pipe 56 of the sealing cover 53 on the third pressure plate 4 through a hose, the telescopic pipe 821 passes through the third chassis 3 and is connected to the hot air discharge end of the vortex tube 811.

[0050] like Fig.10 , further comprising a corrosive water supply assembly 9, the corrosive water supply assembly 9 comprising a first condition water tank 91, a second condition water tank 92 and a third condition water tank 93, the first condition water tank 91, the second condition water tank 92 and the third condition water tank 93 are all installed on the top surface of the fourth pressure plate 4, The first condition water tank 91, the second condition water tank 92 and the third condition water tank 93 are all connected to a water supply pump 95 and a water pump 94; The sealing covers 53 on the fourth pressure plate 4 are divided into three groups. The connecting pipes 56 of one group of sealing covers 53 are connected to the water supply pump 95 of the first conditional water tank 91 through a hose, the connecting pipes 56 of one group of sealing covers 53 are connected to the water supply pump 95 of the second conditional water tank 92 through a hose, and the connecting pipes 56 of one group of sealing covers 53 are connected to the water supply pump 95 of the third conditional water tank 93 through a hose. The drain pipe 57 of the sealing seat 51 on the fourth chassis 3 is connected to the corresponding water pump 94 through a hose, and the hose passes through the fourth chassis 3 and the fourth pressure plate 4.

[0051] The first condition water tank 91 contains an artificial seawater solution, which is a solution containing sodium chloride (NaCl), magnesium chloride (MgCl 2 ), calcium chloride (CaCl 2 ) etc., to simulate corrosion in marine environment.

[0052] The second condition is that the water tank 92 is filled with a sulfate solution by adding sodium sulfate (Na 2 SO 4 )、Magnesium sulfate(MgSO 4 ), etc., to simulate sulfate corrosion in industrial pollution or acidic soil.

[0053] The third condition is that the water tank 93 is filled with an acidic solution by adding hydrochloric acid (HCl) and sulfuric acid (H 2 SO 4 ) etc., to simulate the erosion of acid rain or acidic water.

[0054] The implementation principle of the embodiment of the present application is as follows: the test blocks are divided into four groups, and the claw 72 on the first pressure plate 4 is first inserted into the clamping groove 111, and the first pressure plate 4 and all the pressure plates 4 and chassis 3 above it are lifted together, and the first group of test blocks are placed on the support platform 52 of the first chassis 3. Then the first pressure plate 4 is buckled on the first chassis 3, and the claw 72 is kept away from the clamping groove 111. Then the claw 72 on the second pressure plate 4 is inserted into the clamping groove 111, and the second pressure plate 4 and all the pressure plates 4 and chassis 3 above it are lifted together, and the second group of test blocks is placed on the support platform 52 of the second chassis 3, and then the second pressure plate 4 is buckled on the second chassis 3, and the claw 72 is kept away from the clamping groove 111. And so on, the third group of test blocks and the fourth group of test blocks are respectively located in the corresponding sealing seat 51 and in the sealing seat 51.

[0055] Simultaneously start the hot and cold water circulation assembly 2, the cold air supply assembly 81, the hot air supply assembly 82 and the corrosive water supply assembly 9; In the cold and hot water circulation condition simulation experiment, the cold water formed by the chiller 21 and the hot water formed by the heater 22 can be used to control the corresponding solenoid valve 25 and the infusion pump body in the chiller 21. Cold water can be introduced into the conditional test chamber 55. After waiting for several hours, the first pressure plate 4 can be lifted to connect the conditional test chamber 55 of the first pressure plate 4 with the drain pipe 57. The cold water can be pumped out through the return pump body of the chiller 21, and then the first pressure plate 4 can be covered. Then, hot water can be introduced into the conditional test chamber 55 of the first pressure plate 4 through the infusion pump body of the heater 22. After waiting for several hours, the hot water can be drained and then cold water can be introduced again. Through reciprocating operation, alternating cold and hot water can be injected into the conditional test chamber 55 to provide an alternating cold and hot temperature cycle environment for the test block between the first chassis 3 and the first pressure plate 4.

[0056] In the conditional simulation experiment of cold air supply and hot air supply, the booster pump injects high-pressure gas into the vortex tube 811, and the cold air discharged from one end of the vortex tube 811 can directly enter the conditional test chamber 55 of the second pressure plate 4, providing a low-temperature test environment for the test block between the second chassis 3 and the second pressure plate 4. The hot air discharged from one end of the vortex tube 811 enters the conditional test chamber 55 of the second pressure plate 4 through the telescopic tube 821, providing a high-temperature test environment for the test block between the third chassis 3 and the third pressure plate 4. When it is necessary to discharge the cold air / hot air in the conditional test chamber 55, just lift the pressure plate 4 to keep the sealing cover 53 away from the sealing seat 51, so that the conditional test chamber 55 is connected to the drain pipe 57.

[0057] In the conditional simulation experiment of corrosive water supply, the water supply pump 95 is turned on to introduce corrosive water into the conditional test chamber 55 of the fourth pressure plate 4. After waiting for several hours, the fourth pressure plate 4 is lifted up to connect the conditional test chamber of the fourth pressure plate 4 with the drain pipe 57. The corrosive water in the conditional test chamber 55 is pumped back by the water pump 94 for reuse, and then the fourth pressure plate 4 is re-fastened.

[0058] After all the conditions are simulated, the pressure plate 4 is pressed against the chassis 3, and then the driving member 35 drives the locking driving plate 31 to rotate, and the locking rod 34 passes through the locking seat 32 and the locking block 45, so that the pressure plate 4 and the chassis 3 are in a compressed state during the experiment, which can reduce the impact of other pressure plates 4 on the chassis 3 and pressure plates 4 being tested during lifting. Then the first booster pump 42 draws water from the first water tank 41 into the pressurized water chamber 62, so that the sealing ring 61 is pressed against the circumference of the test block, and then the second booster pump 44 draws water from the second water tank 43 to the pressurized water pipe 58, so that the high-pressure water acts on the bottom of the test block, and finally the test block's impermeability can be judged by the detection electrode 54. In this way, when the permeability performance of multiple concrete samples is tested, a variety of environmental simulation conditions can be provided, which can more comprehensively evaluate the impermeability performance of concrete in different environments, thereby improving the accuracy of the experimental results and saving experimental time.

[0059] The present application also provides a method for detecting the anti-permeability of concrete, which is applied to the system for detecting the anti-permeability of concrete in the present application, and includes the following steps: S1: Preparation of concrete standard test blocks; S1.1: Select concrete test blocks with standard dimensions; S1.2: Divide the test blocks into four groups, which are used for testing the anti-seepage performance in cold and hot water circulation exchange, cold air, hot air, and corrosive water environments respectively; S2, four groups of anti-seepage experiments were carried out in parallel; Hot and cold water exchange group; The first set of concrete test blocks are placed in a sealed chamber; Set the hot and cold water to alternately circulate, the specific conditions are cold water 5°C±2°C, circulate for 4 hours; then switch to hot water 60°C±2°C, circulate for 4 hours. The hot and cold air alternation time is no less than 72 hours; After the water circulation is completed, the anti-seepage performance test is carried out, and the pressure is gradually increased. The initial pressure is 0.2 MPa, and the pressure is increased by 0.1 MPa every 4-5 hours until the test block seeps water, and the maximum anti-seepage pressure value is recorded; Cold air condition test group Place the second set of concrete test blocks in a cold air environment at 5°C±2°C for no less than 72 hours; Exhaust the cold air and conduct anti-seepage performance test. Gradually increase the pressure, starting at 0.2 MPa, and increase the pressure by 0.1 MPa every 4-5 hours until water seepage occurs in the test block. Record the maximum anti-seepage pressure value; Hot air condition test group The third group of concrete test blocks are placed in a hot air environment at 60°C±2°C for no less than 72 hours; Exhaust the hot air and conduct anti-seepage performance test. Gradually increase the pressure, starting at 0.2 MPa, and increase the pressure by 0.1 MPa every 4-5 hours until water seepage occurs in the test block. Record the maximum anti-seepage pressure value; Corrosive water immersion group The fourth group of concrete test blocks are placed in an aqueous solution rich in corrosive ions; the immersion time is maintained for no less than 72 hours; Drain the corrosive water; conduct anti-seepage performance test, gradually increase the pressure, the initial pressure is 0.2 MPa, increase the pressure by 0.1 MPa every 4-5 hours, until the test block seeps water, and record the maximum anti-seepage pressure value; S3, comparison and analysis of results; S3.1. Calculate the average anti-seepage pressure of each group based on the maximum anti-seepage pressure values ​​of the four groups of tests; S3.2. Compare the impermeability of the four groups of test blocks under different treatment conditions, and analyze the effects of cold water, hot water, alternating hot and cold air, and corrosive water on the impermeability of concrete.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A concrete impermeability testing system, characterized by: The invention comprises a detection base (1), wherein a hydraulic cylinder (11) is installed in the detection base (1), a plurality of chassis (3) and a plurality of pressure plates (4) are sleeved on the piston rod of the hydraulic cylinder (11), the chassis (3) and the pressure plates (4) are arranged at intervals, the pressure plates (4) are fixedly connected to the chassis (3) above and adjacent to each other, a clamping assembly (7) is arranged on the pressure plate (4), and the clamping assembly (7) is used to connect the pressure plate (4) with the piston rod of the hydraulic cylinder (11), and the chassis ( 3) is provided with a plurality of sealing seats (51), a support platform (52) for placing a test block is provided in the sealing seat (51), a plurality of sealing covers (53) are provided on the pressure plate (4), the sealing covers (53) correspond to the sealing seats (51) one by one, the support platform (52) can be fed with pressurized water and act on the bottom of the test block, a sealing assembly (6) for sealing the peripheral surface of the test block is provided on the sealing cover (53), and a detection electrode (54) is provided on the top of the sealing cover (53); When the sealing assembly (6) is closed and the sealing cover (53) is covered on the corresponding sealing seat (51), the sealing cover (53), the test block and the sealing seat (51) together enclose a conditional test chamber (55); A hot and cold water circulation component (2) is arranged inside the detection base (1), and the hot and cold water circulation component (2) can supply cold water and hot water to a plurality of condition test chambers (55) adjacent to the detection base (1); at least one of the chassis (3) is provided with a cold air supply component (81) for providing cold air to the condition test chambers (55) on the same layer; at least one of the chassis (3) is provided with a hot air supply component (82) for providing hot air to the condition test chambers (55) on the same layer; and at least one of the chassis (3) is provided with a corrosive water supply component (9) for providing corrosive water to the condition test chambers (55) on the same layer.

2. The concrete anti-permeability testing system according to claim 1, characterized in that: The sealing assembly (6) comprises a sealing ring (61), the sealing ring (61) is arranged around the inner wall of the sealing cover (53), the sealing ring (61) and the inner wall of the sealing cover (53) together enclose a pressurized water chamber (62), the sealing cover (53) is provided with a first water injection channel (63) connected to the pressurized water chamber (62), the pressure plate (4) is provided with a first water tank (41) and a first pressurizing pump (42), and the first pressurizing pump (42) is connected to the first water injection channel (63); A connecting pipe (56) connected to the condition test chamber (55) is provided on the top of the sealing cover (53), and the connecting pipe (56) is used to inject water / gas corresponding to the test conditions into the condition test chamber (55); The sealing seat (51) is provided with a drain pipe (57). When the sealing cover (53) is pressed onto the sealing seat (51), the drain pipe (57) is separated from the condition test chamber (55). When the sealing cover (53) is no longer in contact with the bottom of the sealing seat (51), the drain pipe (57) is connected to the condition test chamber (55). The support platform (52) is provided with a pressurized water pipe (58).

3. The concrete anti-permeability testing system according to claim 1 is characterized in that: The clamping assembly (7) comprises a cylinder (71), the cylinder (71) being mounted on a side of the pressure plate (4) facing away from the sealing cover (53), the cylinder (71) being connected to a clamping claw (72), a plurality of clamping grooves (111) being provided on the piston rod of the hydraulic cylinder (11), the clamping grooves (111) corresponding to the clamping claws (72) one by one, and the clamping claws (72) being insertable into corresponding clamping grooves (111).

4. The concrete anti-permeability testing system according to claim 2, characterized in that: The hot and cold water circulation component (2) comprises a water chiller (21) and a heater (22). The water chiller (21) and the heater (22) are both installed in the detection base (1). The sealing cover (53) adjacent to the detection base (1) is connected to a first three-way pipe (23). The sealing seat (51) adjacent to the detection base (1) is connected to a second three-way pipe (24). The two water inlet ends of the first three-way pipe (23) are respectively connected to the water chiller (21) and the heater (22). The water outlet end of the first three-way pipe (23) is connected to the connecting pipe (56). The two drainage ends of the second three-way pipe (24) are respectively connected to the water chiller (21) and the heater (22). The water inlet end of the second three-way pipe (24) is connected to the drainage pipe (57). The two water inlet ends of the first three-way pipe (23) and the two drainage ends of the second three-way pipe (24) are both provided with solenoid valves (25).

5. The concrete anti-permeability testing system according to claim 2, characterized in that: The cold air supply assembly (81) comprises a vortex tube (811), which is installed on a side of the pressure plate (4) away from the sealing cover (53), the air inlet end of the vortex tube (811) is connected to an air pressure pump (812), and the cold air discharge end of the vortex tube (811) is connected to the connecting pipe (56).

6. The concrete anti-permeability testing system according to claim 5, characterized in that: The two adjacent pressure plates (4) are respectively provided with the cold air supply component (81) and the hot air supply component (82), and the hot air supply component (82) comprises a telescopic pipe (821), one end of the telescopic pipe (821) is connected to the connecting pipe (56), and the telescopic pipe (821) passes through the pressure plate (4) and the corresponding chassis (3), and is connected to the hot air discharge end of the vortex tube (811) on the other pressure plate (4).

7. The concrete anti-permeability testing system according to claim 2, characterized in that: The corrosive water supply assembly (9) comprises a first conditional water tank (91), a second conditional water tank (92) and a third conditional water tank (93). The first conditional water tank (91), the second conditional water tank (92) and the third conditional water tank (93) are all installed on a side of the pressure plate (4) away from the sealing cover (53). The plurality of sealing covers (53) on one pressure plate (4) are divided into three groups. The connecting pipe (56) of one group of sealing covers (53) is connected to the first conditional water tank (91). The connecting pipe (56) of (53) is connected to the second condition water tank (92), and the connecting pipe (56) of a group of the sealing covers (53) is connected to the third condition water tank (93). The first condition water tank (91), the second condition water tank (92) and the third condition water tank (93) are all connected to a water supply pump (95) and a water pump (94). The water supply pump (95) is used to supply water to the condition test chamber (55), and the water pump (94) is used to pump water out of the condition test chamber (55).

8. The concrete anti-permeability testing system according to claim 1, characterized in that: The chassis (3) is provided with a locking drive disk (31) for coaxial rotation, and a first guide groove (311) is provided on the locking drive disk (31). A locking seat (32) is provided on the side of the chassis (3) facing the support platform (52), and a fixing sleeve (33) is installed on the locking seat (32). A locking rod (34) is passed through the fixing sleeve (33), and one end of the locking rod (34) is slidably arranged in the first guide groove (311). The pressure plate (4) is provided with a locking block (45), and the chassis (3) is provided with a driving member (35) for driving the locking drive disk (31) to rotate. When the pressure plate (4) is buckled on the chassis (3), the locking block (45) faces the locking seat (32), and the driving member (35) drives the locking drive disk (31) to rotate, so that the locking rod (34) passes through the locking seat (32) and the locking block (45).

9. The concrete anti-permeability testing system according to claim 8, characterized in that: The driving member (35) comprises a driving cylinder (351), the driving cylinder (351) is hinged on the bottom surface of the chassis (3), a second guide groove (36) is provided on the bottom surface of the chassis (3), a piston rod of the driving cylinder (351) is vertically connected to a rolling column (37), the rolling column (37) rolls along the second guide groove (36) and the rolling column (37) is hinged to the chassis (3).

10. A method for testing the impermeability of concrete, characterized in that: The steps include: S1: Preparation of concrete standard test blocks; S1.1: Select concrete test blocks with standard dimensions; S1.2: Divide the test blocks into four groups, which are used for testing the anti-seepage performance in cold and hot water circulation exchange, cold air, hot air, and corrosive water environments respectively; S2, four groups of anti-seepage experiments were carried out in parallel; Hot and cold water exchange group; The first set of concrete test blocks are placed in a sealed chamber; Set up hot and cold water alternating circulation, the specific conditions are cold water 5°C±2°C, circulate for 4 hours; then switch to hot water 60°C±2°C, circulate for 4 hours, the hot and cold air alternation time is no less than 72 hours; After the water circulation is completed, the anti-seepage performance test is carried out, and the pressure is gradually increased. The initial pressure is 0.2 MPa, and the pressure is increased by 0.1 MPa every 4-5 hours until the test block seeps water, and the maximum anti-seepage pressure value is recorded; Cold air condition test group; Place the second set of concrete test blocks in a cold air environment at 5°C±2°C for no less than 72 hours; Exhaust the cold air and conduct anti-seepage performance test. Gradually increase the pressure, starting at 0.2 MPa, and increase the pressure by 0.1 MPa every 4-5 hours until water seepage occurs in the test block. Record the maximum anti-seepage pressure value; Hot air condition test group; The third group of concrete test blocks are placed in a hot air environment at 60°C±2°C for no less than 72 hours; Exhaust the hot air and conduct anti-seepage performance test. Gradually increase the pressure, starting at 0.2 MPa, and increase the pressure by 0.1 MPa every 4-5 hours until water seepage occurs in the test block. Record the maximum anti-seepage pressure value; Corrosive water immersion group; The fourth group of concrete test blocks are placed in an aqueous solution rich in corrosive ions; the immersion time is maintained for no less than 72 hours; Drain the corrosive water; conduct anti-seepage performance test, gradually increase the pressure, the initial pressure is 0.2 MPa, increase the pressure by 0.1 MPa every 4-5 hours, until the test block seeps water, and record the maximum anti-seepage pressure value; S3, comparison and analysis of results; S3.

1. Calculate the average anti-seepage pressure of each group based on the maximum anti-seepage pressure values ​​of the four groups of tests; S3.

2. Compare the impermeability of the four groups of test blocks under different treatment conditions, and analyze the effects of cold water, hot water, alternating hot and cold air, and corrosive water on the impermeability of concrete.

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