Concrete permeability meter with water-saving cycle and control system thereof

Abstract

The application relates to a concrete impermeability instrument with a water-saving cycle and a control system thereof, and relates to the field of the concrete impermeability instrument. The concrete impermeability instrument comprises a box, a material pressing assembly, a water cycle assembly, a driving assembly, a filtering assembly, a cleaning assembly and a control system. A material placing area is formed in the box through a partition plate. The material pressing assembly is arranged in the material placing area, and water recycling is realized through the water cycle assembly. The driving assembly controls the movement of the material pressing assembly. The filtering assembly filters the recycled water. The cleaning assembly cleans the equipment. The control system controls the linear motor through pressure feedback. The application has the effect of reducing water resource waste.

Description

Technical Field

[0001] This application relates to the field of concrete permeability testing instruments, and more particularly to a concrete permeability testing instrument with water-saving circulation and its control system. Background Technology

[0002] In the field of construction engineering, concrete quality testing is crucial, and impermeability is one of the key indicators for measuring concrete durability. Therefore, concrete permeability meters play an indispensable role in the quality control of construction projects.

[0003] Currently, conventional testing equipment for concrete impermeability testing typically employs a relatively simple structure. Generally, the concrete specimen is placed in a fixed testing space, and water is forced through the specimen under pressure to test its impermeability.

[0004] However, these existing conventional testing devices have obvious drawbacks. During the testing process, the water squeezed out of the concrete specimen is usually discharged directly, resulting in a waste of water resources. Therefore, providing a concrete permeability tester that can reduce water waste is an urgent problem to be solved. Summary of the Invention

[0005] To reduce water waste, this application provides a concrete impermeability tester and its control system that features water-saving circulation.

[0006] Firstly, this application provides a concrete permeability testing instrument with water-saving circulation, employing the following technical solution: A concrete impermeability tester with water-saving circulation includes a housing, a pressing component, and a water circulation component; The box body has an open side; multiple partitions are fixedly connected inside the box body, the partitions are perpendicular to the first direction, the multiple partitions are spaced apart in the first direction, and a material placement area is formed between two adjacent partitions; of the two adjacent partitions, one is the upper partition and the other is the lower partition; Each of the material placement areas is provided with a plurality of the pressing components, each pressing component including an outer sleeve and a pressing block located inside the outer sleeve; both the pressing block and the outer sleeve slide along a first direction; The water circulation assembly includes a first return water pipe, a water collection tank, and an air pump. The lower partition plate is provided with a plurality of first return water holes, and each pressure block is provided with a corresponding first return water hole below it; one end of the first return water pipe is fixedly connected to the lower partition plate and communicates with the first return water hole, and the other end is connected to the top of the water collection tank; the suction end of the air pump is connected to the top of the water collection tank.

[0007] By adopting the above technical solution, the box body is open on one side to facilitate the placement and removal of concrete specimens; the partitions inside the box body are distributed at intervals to form a material placement area, which facilitates the arrangement of the pressing component; the outer sleeve and pressing block of the pressing component can slide along the first direction to apply pressure to the concrete specimen; the water circulation component uses the first return water pipe, the water collection tank and the air pump to pump the water discharged from the first return water hole into the water collection tank, realizing the recycling of water resources and reducing the waste of water resources.

[0008] Optionally, it also includes two drive components, one of which is an external drive component and the other is an internal drive component, the two drive components being arranged side by side in the second direction; the drive components include: Two linear motors are fixedly connected to the housing. The driving direction of the linear motors is parallel to the first direction. In the third direction, the partition is located between the two linear motors. A lifting rod parallel to the first direction, with each output end of the linear motor being fixedly connected to a corresponding lifting rod; In addition, there are multiple drive rods parallel to the third direction, each of which is fixedly connected to a lifting rod at both ends, and each of the material placement areas is provided with a corresponding drive rod; The drive rod in the external drive assembly is fixedly connected to the outer sleeve; A vertical rod is fixedly connected to the pressure block, with one end of the vertical rod extending to the outer end of the outer sleeve near the upper partition. The drive rod in the inner drive assembly is fixedly connected to the vertical rod.

[0009] By adopting the above technical solution, the two drive components can control the lifting and lowering of the outer sleeve and the pressure block respectively, so that the two can move relative to each other. This allows the outer sleeve to be placed around the outer periphery of the concrete test block first, and then the concrete test block to be pressed down to prevent the concrete test block from cracking.

[0010] Optionally, the pressing assembly further includes a support plate; Each of the pressure blocks is provided with a support plate below it, which is fixedly connected to the lower partition plate. The support plate covers the first return water hole. The support plate is provided with a plurality of drainage holes that penetrate the support plate along the first direction. The drainage holes are connected to the first return water hole. The outer sleeve can be fitted onto the outside of the support plate.

[0011] By adopting the above technical solution, the support plate covers the first return water hole and opens a drainage hole that is connected to the first return water hole, so that the squeezed water can be smoothly discharged from the drainage hole through the first return water hole; the outer sleeve can be appropriately installed outside the support plate to prevent the concrete test block from breaking during the pressing process.

[0012] Optionally, it also includes a filter assembly disposed on the water collection tank, the filter assembly comprising: A filter screen is installed inside the water collection tank, and the connection between the first return water pipe and the water collection tank is located above the filter screen.

[0013] By adopting the above technical solution, the recycled water flowing into the collection tank from the first return water pipe is filtered using a filter screen to prevent impurities from entering the subsequent water circulation process, ensuring the cleanliness of the recycled water, realizing the effective recycling of water resources, and reducing water waste.

[0014] Optionally, a plurality of springs are fixedly connected to the outer periphery of the filter screen, and the other end of the springs is fixedly connected to the inner wall of the water collection tank.

[0015] By adopting the above technical solution, the multiple springs fixed on the outer periphery of the filter screen play a role in buffering and supporting the filter screen, reducing the shaking of the filter screen when impacted by water flow and when impurities accumulate, ensuring stable operation of the filter screen, avoiding impurities from affecting the normal filtration effect of the filter screen, and thus improving the efficiency of water resource recovery and recycling.

[0016] Optionally, the filter screen is cone-shaped with the opening facing upwards.

[0017] By adopting the above technical solution, impurities can be easily accumulated at the bottom of the filter screen, and water can easily fall off from other parts of the filter screen.

[0018] Optionally, a vibration motor is fixedly connected to the bottom wall of the filter screen.

[0019] By adopting the above technical solution, the vibrating motor is used to make the filter screen vibrate, preventing impurities from clogging the filter screen, ensuring the filtration effect of the filter component on the recycled water, and thus ensuring the normal operation of the water recycling component, so as to better realize the recycling of water resources.

[0020] Optionally, a cleanup component may also be included, the cleanup component comprising: A water outlet pipe is fixedly connected to and communicates with the bottom of the water collection tank; A water pump, which is connected to the outlet pipe and used to draw liquid from the water collection tank; In addition, a plurality of nozzles connected to the water outlet pipe, some of the nozzles facing the upper surface of the lower partition, and the remaining nozzles facing the upper surface of the support plate.

[0021] By adopting the above technical solution, the liquid in the water collection tank is extracted through the water outlet pipe using a water pump, and the upper surface of the lower partition and support plate is cleaned by spraying water through the nozzle, thereby cleaning the inside of the equipment. The recycled water can be used to achieve water resource recycling, reduce waste, and improve equipment efficiency and environmental performance.

[0022] Optionally, the cleaning assembly further includes a second return water pipe; The lower partition is provided with a second return water hole on the side of the first return water hole. One end of the second return water pipe is fixedly connected to the lower partition and to the second return water hole, and the other end is fixedly connected to the top of the water collection tank and communicates with it.

[0023] By adopting the above technical solution, the second return water pipe will recycle the cleaned water back to the water collection tank, realizing the recycling of water resources, reducing waste, and improving the efficiency and environmental performance of the equipment.

[0024] Secondly, this application provides a control system for a concrete permeability analyzer, which adopts the following technical solution: A control system for a concrete permeability tester includes a pressure feedback component, the pressure feedback component comprising: A pressure sensor is provided, wherein a mounting groove is formed in the concave bottom wall of the pressure block, the pressure sensor is located in the mounting groove and is fixedly connected to the pressure block, and the detection surface of the pressure sensor is flush with the bottom wall of the pressure block. Furthermore, the controller, the pressure sensor, and the linear motor are all communicatively connected to the pressure sensor; The controller is used to receive the pressure signal emitted by the pressure sensor, process the data, and send a start / stop signal to the linear motor.

[0025] By adopting the above technical solution, the pressure sensor of the pressure feedback component can accurately detect the pressure applied by the pressure block to the concrete specimen. The controller receives the pressure signal, processes it, and sends a start / stop signal to the linear motor to achieve precise control of the pressure.

[0026] In summary, this application includes at least one of the following beneficial technical effects: The water circulation component can pump the water squeezed out of the concrete specimen into the water collection tank through the first return water pipe, thereby realizing the recycling of water resources and reducing water waste. The outer sleeve and the pressure block of the pressing component can be controlled separately. The outer sleeve can be placed around the concrete test block first, and then the concrete test block can be pressed down to prevent the concrete test block from cracking. The pressure feedback component can monitor and precisely control the pressure applied to the concrete specimen by the pressure block in real time, ensuring the accuracy of the test results. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a schematic diagram of the material pressing assembly in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the driving component in the embodiments of this application; Figure 4This is a schematic diagram of the structure of the filtering component in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the cleaning component in the embodiments of this application.

[0028] Figure 6 This is a schematic diagram of the pressure feedback component in an embodiment of this application; Figure 7 This is a schematic diagram of the pressure sensor in an embodiment of this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Box body; 11. Partition plate; 111. Material feeding area; 112. First return water hole; 113. Second return water hole; 2. Pressing assembly; 21. Outer sleeve; 22. Pressing block; 221. Upright pole; 23. Support plate; 231. Drain hole; 3. Water circulation assembly; 31. First return water pipe; 32. Water collection tank; 33. Air pump; 34. First main pipe; 4. Drive assembly; 4a. External drive assembly; 4b. Internal drive assembly; 41. Linear motor; 42. Lifting rod; 43. Drive rod; 5. Pressure feedback assembly; 51. Pressure sensor; 52. Controller; 6. Filter assembly; 61. Filter screen; 62. Spring; 63. Vibration motor; 7. Cleaning assembly; 71. Water outlet pipe; 72. Water pump; 73. Nozzle; 74. Second return water pipe; 75. Second main pipe. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-5 This application will be further described in detail. For ease of description, this application introduces directional terms such as first direction, second direction, and third direction to form a three-dimensional reference direction. The directional terms used, such as "first direction, second direction, and third direction," can be specifically referred to in the figure, where X represents the first direction, Y represents the second direction, and Z represents the third direction. The first direction, second direction, and third direction are perpendicular to each other. In this application, the first direction is preferably a vertical direction.

[0031] This application discloses a concrete permeability meter with water-saving circulation and its control system. (Refer to...) Figure 1 , Figure 2 , Figure 3 and Figure 4 The concrete permeability analyzer and its control system, featuring water-saving circulation, include a housing 1, a pressing assembly 2, a water circulation assembly 3, a drive assembly 4, a filter assembly 6, and a cleaning assembly 7. The housing 1 provides space for installation and operation of the entire device. The pressing assembly 2 applies pressure to the concrete specimen. The water circulation assembly 3 recycles water. The drive assembly 4 controls the raising and lowering of the pressing assembly 2. The filter assembly 6 filters the recycled water. The cleaning assembly 7 cleans the interior of the device. These components work together to effectively solve the problems of water waste and inconvenient cleaning in existing concrete permeability analyzers.

[0032] Reference Figure 1 Specifically, the box body 1 has an open side, and the side wall of the box body 1 with the open side is perpendicular to the second direction, which makes it convenient for personnel to reach into the box body 1 along the second direction to place and take out concrete specimens; multiple partitions 11 are fixedly connected inside the box body 1. The partitions 11 are flat plates perpendicular to the first direction. The multiple partitions 11 are spaced apart in the first direction, and a material placement area 111 is formed between two adjacent partitions 11; among two adjacent partitions 11, one is the upper partition 11 and the other is the lower partition 11.

[0033] Reference Figure 1 and Figure 2 Each material placement area 111 is equipped with multiple pressing components 2, which are distributed at intervals in a third direction. Each pressing component 2 includes an outer sleeve 21, a pressing block 22 located inside the outer sleeve 21, and a support plate 23 fixedly connected to the upper surface of the lower partition 11. The pressing block 22 and the outer sleeve 21 are slidably connected to the upper partition 11 in a first direction, which allows them to move up and down to apply pressure to the concrete specimen. The outer peripheral wall of the pressing block 22 contacts the inner peripheral wall of the outer sleeve 21, and the two can move relative to each other. During operation, the outer sleeve 21 moves down and covers the outside of the concrete specimen to prevent the concrete specimen from cracking. Then, the pressing block 22 moves down and applies pressure to the concrete specimen to squeeze out water. To facilitate water drainage, the lower partition 11 is provided with a plurality of first return water holes 112, and each pressure block 22 is provided with a corresponding first return water hole 112 below it; after the water flows out from the first return water hole 112, it is received by the water circulation component 3. The support plate 23 is fixedly connected to the lower partition plate 11 and covers the first return water hole 112. The support plate 23 has multiple drainage holes 231 that penetrate the support plate 23 along the first direction. The drainage holes 231 are connected to the first return water hole 112 and are used to drain the squeezed water. The outer sleeve 21 can be fitted onto the outside of the support plate 23. After the concrete test block is placed on the support plate 23, the outer sleeve 21 moves downward to fit onto the outer periphery of the support plate 23 to prevent the concrete test block from breaking during the pressing of the pressure block 22.

[0034] Reference Figure 1 , Figure 2 and Figure 3There are two drive components 4, one is an outer drive component 4a and the other is an inner drive component 4b. The two drive components 4 are arranged side by side in the second direction. Each drive component 4 includes a linear motor 41 fixedly connected to the housing 1, a lifting rod 42 parallel to the first direction and a plurality of drive rods 43 parallel to the third direction. The driving direction of the linear motor 41 is parallel to the first direction. Each drive component 4 includes two linear motors 41. In the third direction, the partition 11 is located between the two linear motors 41. The output end of the linear motor 41 is fixedly connected to the inner wall of the housing 1. Each output end of the linear motor 41 is fixedly connected to a lifting rod 42. Each end of the drive rod 43 is fixedly connected to a lifting rod 42. Each material placement area 111 is provided with a corresponding drive rod 43. The drive rod 43 in the outer drive assembly 4a is fixedly connected to the outer sleeve 21. A vertical rod 221 parallel to the first direction is fixedly connected to the pressure block 22. One end of the vertical rod 221 extends to the outside of the outer sleeve 21 near the upper partition 11, that is, one end extends above the outer sleeve 21. The drive rod 43 in the inner drive assembly 4b is fixedly connected to the top of the vertical rod 221. During operation, the outer drive assembly 4a controls the raising and lowering of the outer sleeve 21, and the inner drive assembly 4b controls the raising and lowering of the pressure block 22. After the outer sleeve 21 and the pressure block 22 are controlled separately, they can move relative to each other. That is to say, the outer sleeve 21 can be fitted onto the outer periphery of the concrete test block before pressing down on the concrete test block to prevent cracking of the concrete test block.

[0035] Reference Figure 2 and Figure 4 The water circulation component 3 includes a first return water pipe 31, a water collection tank 32, and an air pump 33. One end of the first return water pipe 31 is fixedly connected to the lower partition plate 11 and communicates with the first return water hole 112, and the other end is connected to the top of the water collection tank 32. A first main pipe 34 can be installed on the top of the water collection tank 32 and connected to the first return water pipe 31 to collect the water from the first return water pipe 31 into the water collection tank 32. The air pump 33 is connected to the top of the water collection tank 32. By using the air pump 33 to create a vacuum in the water collection tank 32, the water discharged from the first return water hole 112 is pumped into the water collection tank 32 through the first return water pipe 31 to realize the recycling of water resources.

[0036] Reference Figure 4 and Figure 5The water in the water collection tank 32 can be reused through the cleaning component 7, which includes a water outlet pipe 71, a water pump 72, a nozzle 73, and a second return water pipe 74. The water outlet pipe 71 is fixedly connected to and communicates with the bottom of the water collection tank 32. The water pump 72 is connected to the water outlet pipe 71 and is used to extract the liquid in the water collection tank 32. The nozzle 73 is connected to the water outlet pipe 71 through a branch water pipe. The nozzle 73 is fixedly connected to the partition 11 and there are multiple nozzles. Among the multiple nozzles 73 connected to the water outlet pipe 71, some nozzles 73 face the upper surface of the lower partition 11, and the remaining nozzles 73 face the upper surface of the support plate 23. The lower partition 11 has a second return water hole 113 on the side of the first return water hole 112. The nozzle 73 can be a high-pressure nozzle 73. When the nozzle 73 sprays water onto the partition 11, it can clean the residue on the partition 11. The water finally flows downward from the second return water hole 113. One end of the second return water pipe 74 is fixedly connected to the lower partition 11 and the second return water hole 113, and the other end is fixedly connected to the top of the water collection tank 32. Specifically, the second return water pipe 74 can converge to the second main pipe 75 and communicate with the water collection tank 32 through the second main pipe 75. In order to prevent the water on the lower partition 11 from falling, an upward flange can also be provided on the outer periphery of the lower partition 11.

[0037] Reference Figure 4 The filter assembly 6 is located inside the water collection tank 32. The filter assembly 6 includes a filter screen 61 disposed within the water collection tank 32. The connections between the first return water pipe 31 and the second return water pipe 74 and the water collection tank 32 are both located above the filter screen 61, allowing water to fall onto the filter screen 61. Multiple springs 62 are fixedly connected to the outer periphery of the filter screen 61, with the other end of each spring fixedly connected to the inner wall of the water collection tank 32. The springs 62 are preferably tension springs. The filter screen 61 is a cone shape with an upward opening, i.e., an inverted cone shape. A vibration motor 63 is fixedly connected to the bottom wall of the filter screen 61. The springs 62 act as buffers and support for the filter screen 61, and the vibration motor 63 causes the filter screen 61 to vibrate, preventing impurities from clogging the filter screen 61. In other words, impurities falling onto the filter screen 61 are filtered by the filter screen 61, and clean water is drawn from the outlet pipe 71 to the nozzle 73.

[0038] The implementation principle of a water-saving and circulating concrete permeability analyzer and its control system according to this application embodiment is as follows: This concrete permeability analyzer, through the coordinated operation of its components, enables the testing of the permeability resistance of concrete specimens, while effectively solving the problems of water waste and inconvenient cleaning. During the testing process, the drive component 4 controls the pressing component 2 to apply pressure to the concrete specimen, and the pressure feedback component 5 monitors the pressure in real time and performs precise control to ensure the accuracy of the test results. The water circulation component 3 recovers the squeezed water to the collection tank 32, the filtration component 6 filters the recovered water, and the cleaning component 7 uses the recovered water to clean the inside of the equipment, thus realizing the recycling of water resources, reducing waste, and improving the equipment's efficiency and environmental performance.

[0039] This application also discloses a control system for a concrete permeability meter; see reference to Figure 6 and Figure 7 It includes a pressure feedback component 5, which includes a pressure sensor 51 and a controller 52; the bottom wall of the pressure block 22 has a recessed mounting groove, the pressure sensor 51 is located in the mounting groove and is fixedly connected to the pressure block 22, and the detection surface of the pressure sensor 51 is flush with the bottom wall of the pressure block 22, so that the pressure applied by the pressure block 22 to the concrete specimen can be accurately detected.

[0040] The implementation principle of the control system of the concrete permeability tester in this embodiment is as follows: both the pressure sensor 51 and the linear motor 41 are communicatively connected to the pressure sensor 51; the controller 52 is used to receive the pressure signal emitted by the pressure sensor 51, process the data, and send start / stop signals to the linear motor 41; the pressure sensor 51 can be a strain gauge pressure sensor 51 or a piezoelectric pressure sensor 51, which has high sensitivity and accuracy. The controller 52 can be a microcontroller or a PLC, which can realize precise control of pressure.

[0041] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A concrete permeability tester with water-saving circulation, characterized in that, It includes a housing (1), a pressing assembly (2), and a water circulation assembly (3); The box body (1) has an open side; multiple partitions (11) are fixedly connected inside the box body (1), the partitions (11) are perpendicular to the first direction, the multiple partitions (11) are spaced apart in the first direction, and a material placement area (111) is formed between two adjacent partitions (11); one of the two adjacent partitions (11) is the upper partition (11) and the other is the lower partition (11); Each of the material placement areas (111) is provided with a plurality of the pressing components (2), each pressing component (2) including an outer sleeve (21) and a pressing block (22) located inside the outer sleeve (21); the pressing block (22) and the outer sleeve (21) both slide along a first direction; The water circulation component (3) includes a first return water pipe (31), a water collection tank (32), and an air pump (33); The lower partition (11) is provided with a plurality of first return water holes (112), and each of the pressure blocks (22) is provided with a corresponding first return water hole (112) below it; one end of the first return water pipe (31) is fixedly connected to the lower partition (11) and communicates with the first return water hole (112), and the other end is connected to the top of the water collection tank (32); the air pump (33) is connected to the top of the water collection tank (32).

2. The concrete permeability tester with water-saving circulation according to claim 1, characterized in that, It also includes two drive components (4), one of which is an external drive component (4a) and the other is an internal drive component (4b), the two drive components (4) being arranged side by side in a second direction; the drive component (4) includes: Two linear motors (41) are fixedly connected to the housing (1). The driving direction of the linear motors (41) is parallel to the first direction. In the third direction, the partition (11) is located between the two linear motors (41). A lifting rod (42) parallel to the first direction, and a corresponding lifting rod (42) is fixedly connected to the output end of each of the linear motors (41); In addition, there are multiple drive rods (43) parallel to the third direction, each of the two ends of the drive rod (43) is fixedly connected to a lifting rod (42), and each of the material placement areas (111) is provided with a corresponding drive rod (43); The drive rod (43) in the external drive assembly (4a) is fixedly connected to the outer sleeve (21); A vertical rod (221) is fixedly connected to the pressure block (22). One end of the vertical rod (221) extends to the outer end of the outer sleeve (21) near the upper partition (11). The drive rod (43) in the inner drive assembly (4b) is fixedly connected to the vertical rod (221).

3. A concrete permeability tester with water-saving circulation according to claim 2, characterized in that, The pressing assembly (2) also includes a support plate (23); Each of the pressure blocks (22) is provided with a support plate (23) fixedly connected to the lower partition plate (11) below it. The support plate (23) covers the first return water hole (112). The support plate (23) is provided with a plurality of drainage holes (231) that penetrate the support plate (23) along the first direction. The drainage holes (231) are connected to the first return water hole (112). The outer sleeve (21) can be fitted onto the outside of the support plate (23).

4. A concrete permeability tester with water-saving circulation according to claim 3, characterized in that, It also includes a filter assembly (6) disposed on the water collection tank (32), the filter assembly (6) comprising: The filter screen (61) is installed inside the water collection tank (32), and the connection between the first return water pipe (31) and the water collection tank (32) is located above the filter screen (61).

5. A concrete permeability tester with water-saving circulation according to claim 4, characterized in that, Multiple springs (62) are fixedly connected to the outer periphery of the filter screen (61), and the other end of the springs (62) is fixedly connected to the inner wall of the water collection tank (32).

6. A concrete permeability tester with water-saving circulation according to claim 5, characterized in that, The filter (61) is a cone shape with the opening facing upwards.

7. A concrete permeability tester with water-saving circulation according to claim 6, characterized in that, A vibration motor (63) is fixedly connected to the bottom wall of the filter screen (61).

8. A concrete permeability tester with water-saving circulation according to any one of claims 3-7, characterized in that, It also includes a cleaning component (7), which includes: Water outlet pipe (71), which is fixedly connected to and communicates with the bottom of the water collection tank (32); A water pump (72) is connected to the outlet pipe (71) and is used to draw liquid from the water collection tank (32); In addition, a plurality of nozzles (73) connected to the water outlet pipe (71) have some nozzles (73) facing the upper surface of the lower partition (11) and the rest of the nozzles (73) facing the upper surface of the support plate (23).

9. A concrete permeability tester with water-saving circulation according to claim 8, characterized in that, The cleaning assembly (7) also includes a second return water pipe (74); The lower partition (11) is provided with a second return water hole (113) on the side of the first return water hole (112). One end of the second return water pipe (74) is fixedly connected to the lower partition (11) and fixedly connected to the second return water hole (113), and the other end is fixedly connected to the top of the water collection tank (32) and communicates with it.

10. A control system for a concrete permeability tester as described in any one of claims 2-9, characterized in that, Includes a pressure feedback component (5), said pressure feedback component (5) comprising: The pressure sensor (51) is located in the mounting groove formed by the recessed bottom wall of the pressure block (22) and is fixedly connected to the pressure block (22). The detection surface of the pressure sensor (51) is flush with the bottom wall of the pressure block (22). In addition, the controller (52), the pressure sensor (51) and the linear motor (41) are all communicatively connected to the pressure sensor (51); The controller (52) is used to receive the pressure signal emitted by the pressure sensor (51), process the data, and send a start / stop signal to the linear motor (41).

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