Automatic concrete impermeability instrument
By introducing technologies such as water-impregnated sensors and PLC controllers into the concrete seepage anti-seepage instrument, the automatic leakage detection, control valves and recording functions are realized, which solves the problems of human resource occupation and inaccurate detection in the existing technology, and ensures that the test process complies with the standards.
Patent Information
- Application Number
- CN202422232461.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-12
AI Technical Summary
The existing concrete seepage anti-seepage instrument requires rotational inspections day and night, and cannot automatically determine the leakage, and cannot record and stop the test in a timely manner, occupy human resources and does not meet the standard requirements.
An automated concrete seepage anti-seepage instrument was designed, using water-immersed sensors, solenoid valves, PLC controllers and touch display screens to automatically detect leakage, control valve opening and closing, record water pressure and time, automatically stop tests and evaluation results, ensuring that the test process complies with the specifications.
It realizes unattended throughout the process, automatically judges leakage conditions, is safe and reliable, and can prevent equipment damage without being watched, ensuring that the test results are accurate and comply with the standards.
Smart Images
Figure CN223078147U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of impermeability meters, and relates to a concrete impermeability meter, in particular to an automatic concrete impermeability meter. Background Art
[0002] Concrete is a commonly used building material, and its performance is crucial for the durability and service life of buildings. However, since concrete is a porous material, if there are large voids or microcracks, moisture will penetrate into the interior of the concrete through these channels, resulting in corrosion, structural damage, and functional problems. Therefore, the impermeability performance of concrete is also one of the important indicators for evaluating the quality of concrete. According to the standard requirements of the step-by-step pressure method in Section 6.2 of the Standard for Test Methods of Long-Term Performance and Durability of Ordinary Concrete GB / T50082-2009, it is not difficult to see that the entire impermeability test has a long cycle and a long pressure-holding time during the test. When assuming that the impermeability grade of the test specimen is P8, starting from 0.1 MPa, the pressure is increased by 0.1 MPa every 8 hours until it is gradually increased to 0.8 MPa, and the test time will continue for 64 hours continuously. And according to the provisions of Paragraph 2 of Article 6.2.3 in GB / T 50082-2009, the water seepage condition at the end face of the test piece should be observed at any time. At this time, considering that the test needs to continuously carry out a 64-hour pressure-holding process, there will inevitably be a situation of continuous day and night testing. At night, for observing whether there is water leakage in the test piece at any time, there must be special test personnel on duty to record the time and pressure of the water seepage situation in a timely manner to ensure that the entire test process meets the specification requirements.
[0003] The existing common concrete impermeability meter consists of an equipment frame, a water tank, a piston water pump, a check valve, a water distributor, a manual rotary stop valve, a test piece cylinder base, a pressure gauge, and a pressure controller. The pressure controller controls the piston water pump to pressurize the water distributor, and the pressure of the water distributor is transmitted to six sample pit positions through the manual rotary stop valve to achieve the basic functions of step-by-step pressure increase, pressure holding, and independent control. However, the main disadvantages of the existing common concrete impermeability meter are as follows: 1. Since the pressure control of the six test piece cylinders of the equipment needs to be controlled by a manual rotary stop valve, it is necessary for the inspection personnel to take turns on duty day and night, occupying human resources and consuming personnel energy and time; 2. The equipment itself does not have the ability to judge whether the current test sample leaks, that is, it cannot timely judge the leakage situation of each test piece and record the leakage pressure; 3. When the test personnel cannot find the sample leakage and close the valve in the first time, it will lead to a dead cycle of continuous water leakage and continuous pressure increase; 4. When the number of leaking samples reaches the standard requirement to stop the test condition, it does not have the ability to abort the test, cannot make a grading conclusion in a timely manner, and cannot truly meet the specification and standard requirements.
[0004] Therefore, in view of the defects existing in the above-mentioned prior art, it is necessary to develop a new type of automatic concrete impermeability tester. Content of the Utility Model
[0005] In order to overcome the defects of the prior art, the utility model provides an automatic concrete impermeability tester, which solves the problems existing in the prior art, realizes that during the use of the equipment, it can automatically judge the leakage situation of the test pieces, can automatically control the opening and closing of the valves at each test piece station, can automatically record the water pressure and leakage time when leakage occurs, can automatically stop the test after reaching the corresponding conditions, can automatically evaluate the test results and query the record function, and solves the problem of occupying human resources in this test.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] An automatic concrete impermeability tester, which includes an impermeability tester body and a distribution box. The impermeability tester body includes a support cabinet and a plurality of impermeability test molds arranged on the support cabinet. It is characterized in that each impermeability test mold is provided with an impermeability test piece and a water immersion sensor covering the top of the impermeability test piece. A water distributor and a booster pump are arranged in the support cabinet. The booster pump is connected to the water pump interface on the water distributor through a water pipe. The water distributor is also provided with a pressure transmitter interface and a plurality of water outlets. Each water outlet is provided with a solenoid valve, and each solenoid valve is respectively connected to the water inlet of an impermeability test mold through a water pipe. A pressure transmitter is installed on the pressure transmitter interface. The distribution box is provided with a PLC controller with an analog module, a plurality of water immersion control relays, a plurality of single-phase solid-state relays, a three-phase solid-state relay and a signal isolation module. The motor of the booster pump is connected to the output end of the PLC controller through the three-phase solid-state relay. Each solenoid valve is respectively connected to the output end of the PLC controller through a single-phase solid-state relay. Each water immersion sensor is respectively connected to the input end of the PLC controller through a water immersion control relay. The pressure transmitter is connected to the input end of the analog module of the PLC controller through the signal isolation module.
[0008] Preferably, a plurality of circuit breakers are also arranged in the distribution box. The motor of the booster pump is connected to the power supply incoming line through a circuit breaker.
[0009] Preferably, a 24V switching power supply is also arranged in the distribution box. One end of the 24V switching power supply is connected to the 220V power supply incoming line, and the other end is connected to the single-phase solid-state relay, three-phase solid-state relay, signal isolation module, water immersion control relay and PLC controller.
[0010] Preferably, a touch display screen is further provided on the outer side of the distribution box, and the touch display screen is communicatively connected to the PLC controller.
[0011] Preferably, a power switch is further provided on the outer side of the distribution box, and the power inlet wire is connected to an external power supply through the power switch.
[0012] Preferably, the water immersion sensor is a rope-type water immersion sensor, and the rope-type water immersion sensor is connected in a coiled manner to a disc, and the disc covers the top of the impermeability specimen.
[0013] Preferably, a central hole is provided at the center of the disc, and a plurality of circles of mounting holes are uniformly arranged on the disc around the central hole, and the rope-type water immersion sensor is connected to the disc in a coiled manner through the plurality of circles of mounting holes.
[0014] Preferably, the disc is an acrylic disc, and the rope-type water immersion sensor is connected to the disc in a coiled manner through a non-conductive connecting wire passing through the mounting holes.
[0015] Preferably, the solenoid valve is a 220V normally closed energy-saving high-pressure-resistant solenoid valve.
[0016] Preferably, a water inlet tank is further provided in the support cabinet, and the water inlet tank is connected to the water inlet on the water distributor through a water pipe.
[0017] Compared with the prior art, the automatic concrete impermeability tester of the present invention has one or more of the following beneficial technical effects:
[0018] 1. During the use of the impermeability tester of the present invention, it can automatically judge the leakage situation of the specimen, can automatically control the opening and closing of the valves at each specimen station, can automatically record the water pressure and leakage time during leakage, can automatically stop the test after reaching the corresponding conditions, can automatically evaluate the test results and query the record function, and can solve the problem of occupying human resources in this test.
[0019] 2. The water circuit and electric circuit of the impermeability tester of the present invention are safe and reliable. There is no water leakage under the pipe pressure holding at 1.5 times the nominal working pressure, and there is no pipeline leakage during the stable operation for 8 hours at the nominal working pressure. And when there is pipeline leakage and unexpected situations, it can automatically detect that the pressure of the equipment during pressurization is abnormal and close the water pump without anyone watching, preventing the water pump from working continuously and causing equipment damage. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 is a schematic diagram of the automatic concrete impermeability tester of the present invention.
[0021] Figure 2 is a schematic diagram of the impermeability tester body of the automatic concrete impermeability tester of the present invention.
[0022] Figure 3 is a perspective view of the impermeability tester body of the automatic concrete impermeability tester of the present utility model to show its internal structure.
[0023] Figure 4 is a schematic diagram of the water immersion sensor of the impermeability tester body of the automatic concrete impermeability tester of the present utility model.
[0024] Figure 5 is a schematic diagram of the distribution box of the automatic concrete impermeability tester of the present utility model.
[0025] Figure 6 is an internal schematic diagram of the distribution box of the automatic concrete impermeability tester of the present utility model.
[0026] Figure 7 is the main circuit electrical connection diagram of the automatic concrete impermeability tester of the present utility model.
[0027] Figure 8 is the electrical connection diagram of the input end of the PLC controller of the automatic concrete impermeability tester of the present utility model.
[0028] Figure 9 is the electrical connection diagram of the output end of the PLC controller of the automatic concrete impermeability tester of the present utility model.
[0029] Figure 10 is the electrical connection diagram of the water immersion sensor and the pressure transmitter of the automatic concrete impermeability tester of the present utility model.
[0030] Figure 11 is the electrical connection diagram of the solenoid valve of the automatic concrete impermeability tester of the present utility model. Detailed Embodiments
[0031] Before detailing any embodiment of the present utility model, it should be understood that the present utility model is not limited in its application to the construction and arrangement details of the components described in the following description or illustrated in the following drawings. The present utility model is capable of having other embodiments and can be practiced or carried out in various ways. Additionally, it should be understood that the wording and terminology used herein are for the purpose of description and should not be regarded as restrictive. As used herein, "including" or "having" and their variants are intended to cover the items listed hereinafter and their equivalents as well as additional items. Unless otherwise specified or limited, the terms "mounted," "connected," "supported," and "coupled" and their variants are used broadly and cover direct mounting and indirect mounting, connection, support, and coupling. Further, "connected" and "coupled" are not limited to physical or mechanical connection or coupling.
[0032] Moreover, in the disclosure of the present utility model, in a first aspect, the orientation or positional relationship indicated by terms such as "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present utility model. In a second aspect, the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of the element can be multiple. The term "one" should not be construed as limiting the quantity.
[0033] To solve the problems existing in traditional concrete impermeability testers, the present utility model provides an automated concrete impermeability tester, and its design principles follow the following points:
[0034] 1. It shall not violate the test method requirements in the "Standard for Test Methods of Long-Term Performance and Durability of Ordinary Concrete" GB / T50082 - 2009.
[0035] 2. It shall be able to automatically detect the leakage situation of each test piece; automatically stop the valve of the leakage test piece station; automatically record the time when leakage occurs, water pressure, and test number; achieve automatically recording the pressurization start time each time the pressure increases; after the test is completed, it should be able to automatically give a correct evaluation and store it in the device record and provide a query function.
[0036] 3. In terms of water circuits and circuits, it shall be safe and reliable. The pipeline shall maintain pressure without leakage at 1.5 times the nominal working pressure, and there shall be no pipeline leakage during 8 - hour stable operation at the nominal working pressure. When pipeline leakage or unexpected situations occur, in the case of no one on duty, it should be able to automatically detect abnormal pressurization of the device and close the water pump to prevent the water pump from working continuously and causing device damage.
[0037] Based on the above design principles, as Figure 1 shown, the automated concrete impermeability tester of the present utility model includes an impermeability tester main body 1 and a distribution box 2.
[0038] Among them, as Figure 2 and 3 shown, the impermeability tester main body 1 includes a support cabinet 101 and a plurality of impermeability test molds 102 arranged on the support cabinet 101. Preferably, six impermeability test molds 102 are arranged on the support cabinet 101. Each impermeability test mold 102 is provided with an impermeability test piece and a water immersion sensor 111 covering the top of the impermeability test piece, and the water immersion sensor 111 is used to detect whether the impermeability test piece leaks.
[0039] In the present utility model, as Figure 4 shown, preferably, the water immersion sensor 111 is a rope-type water immersion sensor. The rope-type water immersion sensor is connected to the disk 110 in a coiled manner, and the disk 110 covers the top of the impermeability specimen. More preferably, a central hole 113 is provided at the center of the disk 110, and a plurality of circles of mounting holes 112 are provided on the disk 110 and are uniformly arranged around the central hole 113. The rope-type water immersion sensor is connected to the disk 110 in a coiled manner through the plurality of circles of mounting holes 112, and the tail of the rope-type water immersion sensor passes out from the central hole 113 to be connected to a water immersion control relay 204 described later.
[0040] Most preferably, the disk 110 is an acrylic disk, and the rope-type water immersion sensor is connected to the disk 110 in a coiled manner through a non-conductive connecting wire passing through the mounting holes 112. In this way, conduction can be prevented from affecting the rope-type water immersion sensor.
[0041] The present utility model adopts a disk and a rope-type water immersion sensor connected to the disk in a coiled manner, so that the rope-type water immersion sensor can completely cover the top end of the impermeability specimen, and any leakage at any position of any impermeability specimen can trigger the rope-type water immersion sensor to act, thereby achieving full-automatic leakage detection.
[0042] A water distributor 103 and a booster pump 108 are provided in the support cabinet 101. The water distributor 103 is provided with a plurality of ports. In the present utility model, the water distributor 103 is provided with a pressure transmitter interface 105, a water pump interface 106, a water inlet 107, and seven water outlets. Preferably, the above-mentioned plurality of ports are designed in a structure of 3 in the front, 4 in the back, and 3 on the top, that is, three water outlets are provided on the front side, four water outlets are provided on the back side, and the pressure transmitter interface 105, the water pump interface 106, and the water inlet 107 are provided on the top side.
[0043] The booster pump 108 is connected to the water pump interface 106 on the water distributor 103 through a water pipe (preferably a pressure-resistant and corrosion-proof water pipe) to facilitate high-pressure water injection into the water distributor 103, thereby adjusting the pressure in the water distributor 103.
[0044] A solenoid valve 104 is provided at each of the water outlets. Each solenoid valve 104 is connected to the water inlet of one of the impermeability test molds 102 through a water pipe (preferably a pressure-resistant and corrosion-resistant water pipe). In the present utility model, six solenoid valves 104 are respectively connected to the water inlets of six impermeability test molds 102 one by one through a water pipe (preferably a pressure-resistant and corrosion-resistant water pipe), and the remaining one solenoid valve 104 serves as a drainage and pressure relief valve to facilitate the drainage of the water in the water distributor 103 so as to relieve the pressure of the water distributor 103.
[0045] Preferably, the solenoid valve 104 is a 220V normally closed energy-saving high-pressure-resistant solenoid valve. The 220V normally closed energy-saving high-pressure-resistant solenoid valve is selected because it is considered that continuous operation for dozens of hours is required, and ordinary solenoid valves cannot withstand high pressure and the electromagnetic coil will heat up and burn out when energized for a long time.
[0046] A pressure transmitter is installed on the pressure transmitter interface 105. The pressure transmitter can measure the pressure in the water distributor 103.
[0047] Preferably, a water inlet tank 109 is further provided in the support cabinet 101. The water inlet tank 109 is connected to the water inlet 107 on the water distributor 103 through a water pipe (preferably a stainless steel tap water hose). Thus, it is convenient to quickly fill the water distributor 103 with water before the test. More preferably, a switchable one-way manual water valve is installed at the water inlet 107 to facilitate controlling whether to quickly fill the water distributor 103 with water.
[0048] As Figure 5 and 6 As shown, the distribution box 2 includes a housing 201, and a PLC controller 207 with an analog module, a plurality of water immersion control relays 204, a 24V switching power supply 205, two circuit breakers 206, a plurality of single-phase solid-state relays 210, a three-phase solid-state relay 209, and a signal isolation module 208 are provided in the housing 201. The PLC controller 207 with an analog module can adopt a Siemens S7-200smart PLC controller plus an analog module. A touch display screen 202 and a power switch 203 are provided on the outer side of the housing 201.
[0049] In the present utility model, since there are six water immersion sensors 111, there are six water immersion control relays 204. Since there are seven solenoid valves 104, there are seven single-phase solid-state relays 210.
[0050] Preferably, a touch display screen 202 and a power switch 203 are further provided on the outer side of the housing 201. The power supply incoming line is connected to an external power supply through the power switch 203.
[0051] AsFigure 7 and 9 As shown, the motor of the booster water pump 108 ( Figure 7 the water pump motor in it) is connected to the output terminal of the PLC controller 207 through the three-phase solid-state relay 209 ( Figure 7 the solid-state relay SSR1 in it). Considering that using a contactor to control the frequent start of the motor of the booster water pump 108 requires frequent suction and closing, its mechanical life is not conducive to long-term operation and stability. The present utility model selects the three-phase solid-state relay 209 to control the start and stop of the motor of the booster water pump 108, which not only solves the problem of the mechanical life of the contactor but also completely eliminates the noise caused by the suction of the contactor.
[0052] And, as Figure 7 shown, the motor of the booster water pump 108 is connected to the power supply incoming line through one of the circuit breakers 206 ( Figure 7 the circuit breaker QF1 in it, which can be an air switch). Thus, the safe and stable operation of the three-phase water pump motor can be ensured.
[0053] One end of the 24V switching power supply 205 is connected to the 220V power supply incoming line to convert 220V alternating current into 24V direct current, and the other end is connected to the single-phase solid-state relay 210, the three-phase solid-state relay 209, the signal isolation module 208, the water immersion control relay 204, and the PLC controller 207 to provide them with 24V DC power.
[0054] Another circuit breaker 206 ( Figure 7 the circuit breaker QF2 in it) is provided between one end of the 24V switching power supply 205 and the 220V power supply incoming line to facilitate ensuring the safe and stable operation of the 24V switching power supply 205.
[0055] Meanwhile, the power supply incoming line is connected to an external 220V power supply through the power switch 203 ( Figure 7 the circuit breaker QF3 in it) to facilitate turning on and off the entire automatic concrete impermeability tester through the power switch 203.
[0056] As Figures 8 - 11 shown, each solenoid valve 104 is respectively connected through one of the single-phase solid-state relays 210 ( Figure 11The solid-state relays SSR2, SSR3, SSR4, SSR5, SSR6, SSR7, and SSR8 therein are connected to the output end of the PLC controller 207. Each of the water immersion sensors 111 is respectively connected to the input end of the PLC controller 207 through one of the water immersion control relays 204. The pressure transmitter is connected to the input end of the analog module of the PLC controller 207 through the signal isolation module 208, thereby preventing fluctuations of the pressure transmitter caused by interference.
[0057] In addition, in the present utility model, the touch display screen 202 is also communicatively connected to the PLC controller 207. On the one hand, it is convenient to display relevant information (such as time, pressure, leakage situation, etc.), and on the other hand, it is also convenient to input control parameters, etc.
[0058] During use, the tester can input and change the test number, pressurization level, monitor leakage, record time, etc. through the touch display screen 202, and control the output points of the PLC controller 207 to work by sending signals to the PLC controller 207, thereby controlling the solenoid valve 104 and the motor of the booster pump 108. In addition to controlling the solenoid valve 104 and the motor of the booster pump 108, the PLC controller 207 can also convert the milliamp signal of the pressure transmitter into an analog signal, and perform conversion on the range of the pressure transmitter and the upper and lower limits of the milliamp signal to obtain the current pressure value. Since the analog input point is a signal of 0 - 20 mA and the pressure transmitter is 4 - 20 mA, a formula conversion is required. Due to the corresponding relationship between A / D (analog / digital) and D / A (digital / analog) conversions, the S7-200 SMART PLC controller internally represents the external analog signal with a numerical value, and there is a certain mathematical relationship between the two, which is the conversion relationship between the analog quantity and the numerical quantity. After converting to the real-time pressure, the working logic can be sorted out. The tester fills the water distributor 103 with water through the water inlet valve. Control the touch display screen 202 to turn on the booster pump 108, and turn on the six solenoid valves 104 to pressurize until the water fills each anti-seepage specimen station, and then turn off the solenoid valves 104 and the booster pump 108.
[0059] Reliably seal the anti-seepage specimen and the anti-seepage test mold 102, and install them on the bases of each anti-seepage specimen station. Input the test number and the entrusted pressurization level, and start the experiment. The device automatically sets the set pressure to 0.1 MPa and turns on the solenoid valve 104 and the booster pump 108 for pressurization. When the pressure reaches 0.1 MPa, the pressure-holding timer starts to time the pressure-stabilizing time. After 8 hours, the pressure set value is increased by 0.1 MPa step by step, and so on, and the control test is continuously carried out.
[0060] Once water leakage occurs in the impermeability specimen during the test and the water immersion sensor 111 detects water droplets, it will send an input signal to the PLC controller 207. After the PLC controller 207 transmits the input signal to the touch display screen 202 and the touch display screen 202 receives the leakage signal, it will automatically record the current leakage time and leakage pressure level, and close the solenoid valve 104 at the station of this specimen to ensure that water will not continue to leak, and the other specimen stations will continue the test without being affected.
[0061] When the number of specimens with leakage meets the standard evaluation requirements or after the normal test is completed, close all the solenoid valves 104 and the booster pump 108 and end the test, automatically give the test results and record the start time, end time and leakage status of the test.
[0062] During the pressure test, once pipeline leakage or equipment abnormality occurs, it will not continue to work under pressure, and will drain all the water in the water distributor 103.
[0063] The utility model realizes unattended operation throughout the process, solves the problems of consuming personnel energy and occupying human resources. At the same time, during the use of the impermeability tester, it can automatically judge the leakage situation of the specimen, can automatically control the opening and closing of the valves at each specimen station, can automatically record the water pressure and leakage time during leakage, can automatically stop the test after reaching the corresponding conditions, can automatically evaluate the test results and query the record function, ensuring that the whole test process is rigorous and meets the specification requirements.
[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Those skilled in the art can modify or equivalently replace the technical solutions of the utility model according to the idea of the utility model without departing from the essence and scope of the technical solutions of the utility model.
Claims
1. An automated concrete impermeability tester, which comprises an impermeability tester body (1) and a distribution box (2). The impermeability tester body (1) includes a support cabinet (101) and a plurality of impermeability test molds (102) arranged on the support cabinet (101), and is characterized in that, An impermeability test piece and a water immersion sensor (111) covering the top of the impermeability test piece are provided in each impermeability test mold (102). A water distributor (103) and a booster pump (108) are provided in the support cabinet (101). The booster pump (108) is connected to a water pump interface (106) on the water distributor (103) through a water pipe. A pressure transmitter interface (105) and a plurality of water outlets are further provided on the water distributor (103). An electromagnetic valve (104) is provided on each water outlet, and the electromagnetic valve (104) is respectively connected to an inlet of an impermeability test mold (102) through a water pipe. A pressure transmitter is installed on the pressure transmitter interface (105). A PLC controller (207) with an analog module, a plurality of water immersion control relays (204), a plurality of single-phase solid-state relays (210), a three-phase solid-state relay (209), and a signal isolation module (208) are provided in the distribution box (2). The motor of the booster pump (108) is connected to the output end of the PLC controller (207) through the three-phase solid-state relay (209). Each electromagnetic valve (104) is respectively connected to the output end of the PLC controller (207) through a single-phase solid-state relay (210). Each water immersion sensor (111) is respectively connected to the input end of the PLC controller (207) through a water immersion control relay (204). The pressure transmitter is connected to the input end of the analog module of the PLC controller (207) through the signal isolation module (208).
2. The automated concrete impermeability tester according to claim 1, wherein A plurality of circuit breakers (206) are further provided in the distribution box (2). The motor of the booster pump (108) is connected to the power supply incoming line through a circuit breaker (206).
3. The automated concrete impermeability tester according to claim 2, characterized in that, A 24V switching power supply (205) is further provided in the distribution box (2). One end of the 24V switching power supply (205) is connected to the 220V power supply incoming line, and the other end is connected to the single-phase solid-state relay (210), three-phase solid-state relay (209), signal isolation module (208), water immersion control relay (204), and PLC controller (207).
4. The automated concrete impermeability tester according to claim 3, wherein, A touch display screen (202) is further provided on the outer side of the distribution box (2). The touch display screen (202) is communicatively connected to the PLC controller (207).
5. The automated concrete impermeability tester according to claim 4, wherein, A power switch (203) is further provided on the outer side of the distribution box (2). The power supply incoming line is connected to an external power supply through the power switch (203).
6. The automated concrete impermeability tester according to any one of claims 1-5, characterized in that, The water immersion sensor (111) is a rope-type water immersion sensor. The rope-type water immersion sensor is connected in a coiled manner to a disc (110), and the disc (110) covers the top of the impermeability test piece.
7. The automated concrete impermeability tester according to claim 6, characterized in that, A central hole (113) is provided at the center of the disc (110), and a plurality of circles of mounting holes (112) are evenly provided on the disc (110) around the central hole (113). The rope-type water immersion sensor is connected in a coiled manner to the disc (110) through the plurality of circles of mounting holes (112).
8. The automated concrete impermeability tester according to claim 7, characterized in that, The disc (110) is an acrylic disc, and the rope-type water immersion sensor is connected to the disc (110) in a coiled manner through a non-conductive connecting wire passing through the mounting hole (112).
9. The automated concrete impermeability tester according to claim 8, wherein, The solenoid valve (104) is a 220V normally closed energy-saving high-pressure resistant solenoid valve.
10. The automated concrete impermeability tester according to claim 9, characterized in that, An inlet water tank (109) is further arranged in the support cabinet (101), and the inlet water tank (109) is connected to the water inlet (107) on the water distributor (103) through a water pipe.