Sand-based water-permeable brick water-permeable rate testing device

Abstract

The application discloses a sand-based water-permeable brick water-permeable rate testing device, and relates to the technical field of building material performance detection equipment. The water tank is provided above the water-permeable brick water-permeable rate testing device, the water-proof cover is provided above the water tank, the glue injection sealing assembly is fixedly arranged at the bottom of the water-proof cover and used for assisting in sealing the bottom of the water-proof cover, the glue injection sealing assembly comprises a sealing fixing seat, a sealing gasket and a glue injection limiting seat, the sealing fixing seat is fixedly arranged at the bottom of the water-proof cover, the sealing gasket is arranged between the sealing fixing seat and the water-proof cover and used for sealing the sealing fixing seat and the water-proof cover, and the glue injection limiting seat is fixedly arranged below the sealing fixing seat and used for glue injection sealing.

Description

Technical Field

[0001] This application relates to the technical field of building material performance testing equipment, and in particular to a device for testing the permeability rate of sand-based permeable bricks. Background Technology

[0002] As a key building material in sponge city construction, sand-based permeable bricks directly affect the effectiveness of rainwater infiltration and runoff control. Therefore, it is necessary to accurately test their permeability rate using professional equipment before use. Currently, common sand-based permeable brick permeability rate testing devices mainly consist of a spray system, a water tank, a water-blocking cover, a liquid level sensor, and other auxiliary components. In practical applications, the permeable brick to be tested is placed flat on the water tank, and the water-blocking cover is placed on the permeable brick. The connection between the water-blocking cover and the permeable brick is sealed with sealant. Then, the spray system sprays water into the water-blocking cover by running a metering pump. When the liquid level sensor detects that the water level in the water-blocking cover has reached the specified position, the spraying stops. The permeability rate of the permeable brick is calculated based on the time it takes for the permeable brick per unit area to reach the specified liquid level.

[0003] In summary, the existing technology mainly uses manual application of sealant to seal the connection between the water barrier and the permeable brick. This makes the sealing condition at the bottom of the water barrier susceptible to the skill or precision of the manual application, resulting in poor sealing. When this happens, the water barrier and the permeable brick need to be resealed, which not only affects the accuracy of the test but also the efficiency of the test. Utility Model Content

[0004] In order to reduce the problem of poor sealing caused by human factors in the water-blocking cover of the permeability rate testing device for permeable bricks, this application provides a sand-based permeable brick permeability rate testing device.

[0005] This application provides a device for testing the permeability rate of sand-based permeable bricks, employing the following technical solution: A device for testing the permeability rate of sand-based permeable bricks includes: a water tank, a sample holder, a water-blocking cover, an adhesive injection sealing assembly, and an extrusion positioning assembly. The sample holder is fixedly disposed above the water tank, the water-blocking cover is disposed above the sample holder, and the adhesive injection sealing assembly is fixedly disposed at the bottom of the water-blocking cover for auxiliary sealing of the bottom of the water-blocking cover. The adhesive injection sealing assembly includes a sealing fixing seat, a sealing gasket, and an adhesive injection limiting seat. The sealing fixing seat is fixedly disposed at the bottom of the water-blocking cover, the sealing gasket is disposed between the sealing fixing seat and the water-blocking cover for sealing the sealing fixing seat and the water-blocking cover, and the adhesive injection limiting seat is fixedly disposed below the sealing fixing seat for adhesive injection sealing.

[0006] By adopting the above technical solution, during use, the permeable bricks are supported and limited by the cooperation of the water tank and the sample holder. The bottom of the water-blocking cover is sealed and limited by the glue injection sealing component. Subsequently, the contact position between the glue injection limiting seat and the permeable brick is sealed by injecting sealant into the glue injection limiting seat. At the same time, the water-blocking cover is squeezed from top to bottom by the extrusion positioning component to ensure the contact stability between the glue injection limiting seat and the permeable brick, thus ensuring the effectiveness of the subsequent injection of sealant in sealing the contact position between the glue injection limiting seat and the permeable brick.

[0007] Optionally, a scale line is provided on one side of the water-blocking cover, and an assembly block is fixedly provided on the upper side of the water-blocking cover.

[0008] By adopting the above technical solution, the water level inside the water-blocking cover can be observed and judged by marking the scale lines.

[0009] Optionally, a liquid level sensor is slidably inserted into the assembly block, and a locking bolt is threaded onto one side of the assembly block for locking and positioning the liquid level sensor.

[0010] By adopting the above technical solution, during installation, the liquid level sensor is guided and limited by the assembly block, and the liquid level sensor is locked and positioned by the cooperation of the locking bolt and the assembly block.

[0011] Optionally, it also includes a spray plate, a water pipe, and a guide rod. The spray plate is positioned directly above the water-blocking cover, the water pipe is inserted into the water inlet of the spray plate, and the guide rod is fixedly positioned on one side of the spray plate for supporting, positioning, and adjusting the position of the spray plate.

[0012] By adopting the above technical solution, during use, the spray plate is moved to the top of the water-blocking cover by moving the guide rod. Then, test water is transported into the spray plate through the water pipe, and the permeable bricks are simulated by spraying water from the spray plate.

[0013] Optionally, a pair of fixing ears are integrally formed on the upper part of the sealing fixing seat, and each pair of fixing ears is threaded with mounting bolts.

[0014] By adopting the above technical solution, during installation, the sealing fixing seat is fixedly set at the bottom of the water-blocking cover by the cooperation of the fixing ear plate and the assembly bolt, which ensures the assembly stability of the sealing fixing seat.

[0015] Optionally, the sealing fixing seat has an assembly groove that matches the water-blocking cover. The sealing gasket is set in the assembly groove. The bottom of the assembly groove has multiple anti-detachment and unloading holes. The sealing gasket includes a ring body and multiple positioning posts. The multiple positioning posts are fixedly set below the ring body and inserted into the multiple anti-detachment and unloading holes.

[0016] By adopting the above technical solution, during use, the anti-detachment discharge hole and the positioning column cooperate to assemble, position and limit the sealing gasket. In addition, when cleaning the sealant in the injection limit seat, the solidified sealant in the injection limit seat can be ejected from top to bottom through the anti-detachment discharge hole.

[0017] Optionally, the glue injection limiting seat includes an outer limiting ring and an inner limiting ring. Both the outer limiting ring and the inner limiting ring are fixedly disposed below the sealing fixing seat. The outer limiting ring and the inner limiting ring cooperate to form a glue injection gap. Multiple anti-detachment discharge holes are connected to the glue injection gap. The outer limiting ring is sleeved on the outside of the inner limiting ring, and the inner wall size of the inner limiting ring is the same as the inner wall size of the sealing fixing seat.

[0018] By adopting the above technical solution, the contact position between the injection limit seat and the permeable brick is sealed by the flow of sealant within the injection gap. Compared with manual application, this method has the advantage of better sealing effect.

[0019] Optionally, the glue injection limiting seat further includes multiple observation plates and multiple glue injection tubes, the multiple observation plates and glue injection tubes are respectively disposed on the outside of the outer limiting ring, and the multiple glue injection tubes are all connected to the glue injection gap.

[0020] By adopting the above technical solution, the state of glue injection in the glue injection gap is observed and judged by the observation board, and sealant is injected into the glue injection gap through the glue injection tube.

[0021] Optionally, the extrusion positioning assembly includes an extrusion top plate and a lifting guide component. The extrusion top plate is positioned above the water-blocking cover, and the inner wall dimension of the extrusion top plate is smaller than the inner wall dimension of the water-blocking cover, while the outer wall dimension of the extrusion top plate is larger than the outer wall dimension of the water-blocking cover.

[0022] By adopting the above technical solution, during use, the water-blocking cover is squeezed and limited from top to bottom by squeezing the top plate, which reduces the leakage of sealant along the contact position between the sealant injection limit seat and the permeable brick during the injection process. This reduces the adverse effects of the shaking of the water-blocking cover and the sealant injection assembly on the injection effect and ensures the stability of subsequent injection of sealant into the injection gap.

[0023] Optionally, the lifting guide component includes an assembly frame, a threaded shaft, a lifting guide block, and a drive handle. The assembly frame is fixedly installed above the water tank. The threaded shaft is rotatably installed inside the assembly frame. The lifting guide block is threadedly sleeved on the outside of the threaded shaft and slidably installed inside the assembly frame. One end of the threaded shaft is fixedly connected to the extrusion top plate. The drive handle is fixedly connected to the end of the threaded shaft located outside the assembly frame.

[0024] By adopting the above technical solution, when in use, the rotation of the drive handle is controlled to drive the threaded shaft to rotate, so that the lifting guide block moves up and down with the rotation of the threaded shaft under the action of the thread, thereby driving the extrusion top plate to move up and down synchronously.

[0025] In summary, the embodiments of this application provide a test device for the permeability rate of sand-based permeable bricks, which includes at least one of the following beneficial technical effects: 1. By setting up the glue injection sealing component, the connection between the water barrier and the permeable brick can be sealed with glue, which reduces the adverse effects of manual application on the sealing effect of the connection between the water barrier and the permeable brick, and improves the convenience of glue injection sealing. 2. By setting up the extrusion positioning component, the water-blocking cover can be extruded and positioned from top to bottom, which can ensure the sealing stability of the water-blocking cover, improve the test stability and sealing effect, and ensure the test accuracy. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a sand-based permeable brick permeability rate testing device provided in an embodiment of this application; Figure 2 A schematic diagram illustrating the engagement state of the adhesive injection sealing component and the extrusion positioning component in a sand-based permeable brick permeability rate testing device provided in this application embodiment; Figure 3 This is a schematic diagram of the adhesive injection sealing component in a sand-based permeable brick permeability rate testing device provided in an embodiment of this application; Figure 4 A side sectional view of a sand-based permeable brick permeability rate testing device provided in an embodiment of this application; Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle.

[0027] Explanation of the markings in the image: 1. Sink; 2. Sample holder; 3. Water-blocking cover; 4. Adhesive injection sealing assembly; 401. Sealing fixing seat; 402. Sealing gasket; 4021. Ring body; 4022. Positioning post; 403. Adhesive injection limiting seat; 4031. Outer limiting ring; 4032. Inner limiting ring; 4033. Observation plate; 4034. Adhesive injection tube; 404. Fixing ear plate; 405. Assembly bolts; 5. Extrusion positioning assembly; 501. Extrusion top plate; 502. Assembly frame; 503. Threaded shaft; 504. Lifting guide block; 505. Drive handle; 6. Assembly blocks; 7. Liquid level sensor; 8. Tighten the bolts; 9. Sprayer tray; 10. Water pipes; 11. Guide rod. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0029] Combination Figure 1 and Figure 2 This application discloses a device for testing the permeability rate of sand-based permeable bricks, comprising: a water tank 1, a sample holder 2, a water-blocking cover 3, an adhesive injection sealing assembly 4, and a compression positioning assembly 5. In use, the water tank 1 and sample holder 2 work together to support and limit the permeable bricks. The adhesive injection sealing assembly 4 seals and limits the bottom of the water-blocking cover 3. Subsequently, sealant is injected into the adhesive injection sealing assembly 4 to seal the contact area between the adhesive injection sealing assembly 4 and the permeable brick. Simultaneously, the compression positioning assembly 5 compresses the water-blocking cover 3 from top to bottom, ensuring the stability of the contact between the adhesive injection sealing assembly 4 and the permeable brick, and guaranteeing the effectiveness of the subsequent sealant injection in sealing the contact area between the adhesive injection sealing assembly 4 and the permeable brick.

[0030] Specifically, a scale line is provided on one side of the water-blocking cover 3, which allows the water level inside the water-blocking cover 3 to be observed and judged.

[0031] Combination Figure 1 and Figure 2 An assembly block 6 is fixedly installed on the upper side of the water-blocking cover 3. A liquid level sensor 7 is slidably inserted into the assembly block 6. A locking bolt 8 is threadedly connected to one side of the assembly block 6, and the locking bolt 8 is used to lock and position the liquid level sensor 7. In actual application, the liquid level sensor 7 detects and judges the liquid level state inside the water-blocking cover 3. The assembly block 6 guides and limits the liquid level sensor 7, and the locking bolt 8 locks and positions the liquid level sensor 7 in cooperation with the assembly block 6.

[0032] Specifically, the liquid level sensor 7 is the NI-GCT-NE-EC01 liquid level gauge.

[0033] Combination Figure 1 and Figure 4 It also includes a spray plate 9, a water pipe 10, and a guide rod 11. The spray plate 9 is positioned directly above the water-blocking cover 3. The water pipe 10 is inserted into the water inlet of the spray plate 9. The guide rod 11 is fixedly positioned on one side of the spray plate 9 for supporting, positioning, and adjusting the position of the spray plate 9. By moving the guide rod 11, the spray plate 9 is moved to directly above the water-blocking cover 3. Then, test water is delivered into the spray plate 9 through the water pipe 10, and the permeable bricks are simulated for testing by spraying water from the spray plate 9.

[0034] It is worth noting that in actual application, the water pipe 10 is connected to an external metering pump. By controlling the operation of the metering pump, the test water required for spraying is delivered into the water pipe 10. At the same time, by controlling the water flow rate of the metering pump, the amount of water sprayed by the spray plate 9 is used to simulate different water flow rates from light rain to heavy rain, providing water source conditions that meet the test requirements.

[0035] In addition, a printer and a touchscreen program control unit are fixedly connected to one side of the water tank 1. The liquid level sensor 7 and the metering pump are both electrically connected to the printer and the touchscreen program control unit, enabling the printer and the touchscreen program control unit to calculate and determine the permeability of the permeable bricks based on the operating status of the liquid level sensor 7 and the metering pump. Furthermore, the flow rate and acceleration of the metering pump can be adjusted via the touchscreen program control unit.

[0036] Specifically, the formula for calculating the permeability coefficient of permeable bricks is as follows: K = QL / AHt Where K is the permeability coefficient, Q is the permeation flow rate (i.e., the flow rate of the metering pump), L is the material thickness, A is the area perpendicular to the permeation direction, H is the water head height (i.e., the sensing height of the liquid level sensor 7), and t is the permeation time (i.e., the warning time of the liquid level sensor 7).

[0037] Combination Figure 3 The adhesive injection sealing assembly 4 includes a sealing fixing seat 401, a sealing gasket 402, and an adhesive injection limiting seat 403. The sealing fixing seat 401 is fixedly installed at the bottom of the water-blocking cover 3. A pair of fixing ear plates 404 are integrally formed on the upper part of the sealing fixing seat 401, and each pair of fixing ear plates 404 is threaded with an assembly bolt 405. The sealing fixing seat 401 is fixedly installed at the bottom of the water-blocking cover 3 by the cooperation of the fixing ear plates 404 and the assembly bolts 405, ensuring the assembly stability of the sealing fixing seat 401.

[0038] Combination Figure 4 and Figure 5 A sealing gasket 402 is disposed between the sealing fixing seat 401 and the water-blocking cover 3 to seal the sealing fixing seat 401 and the water-blocking cover 3. The sealing fixing seat 401 has an assembly groove that matches the water-blocking cover 3. The sealing gasket 402 is disposed within the assembly groove. The sealing gasket 402 includes a ring body 4021 and multiple positioning posts 4022. The multiple positioning posts 4022 are all fixedly disposed below the ring body 4021 and inserted into multiple anti-detachment discharge holes. The sealing gasket 402 ensures the sealing seal between the sealing fixing seat 401 and the water-blocking cover 3.

[0039] Specifically, the bottom of the assembly groove is provided with multiple anti-detachment unloading holes. The anti-detachment unloading holes cooperate with the positioning pin 4022 to perform assembly positioning and anti-detachment limiting functions for the sealing gasket 402. In addition, when cleaning the sealant in the glue injection limiting seat 403, the solidified sealant in the glue injection limiting seat 403 can be ejected from top to bottom through the anti-detachment unloading holes.

[0040] Combination Figure 3 An injection limiting seat 403 is fixedly installed below the sealing fixing seat 401 for injection sealing. The injection limiting seat 403 includes an outer limiting ring 4031 and an inner limiting ring 4032, both fixedly installed below the sealing fixing seat 401. The outer limiting ring 4031 and the inner limiting ring 4032 cooperate to form an injection gap. Multiple anti-detachment discharge holes are connected to the injection gap. The outer limiting ring 4031 is sleeved on the outside of the inner limiting ring 4032, and the inner wall size of the inner limiting ring 4032 is the same as the inner wall size of the sealing fixing seat 401. By allowing the sealant to flow within the injection gap, the contact area between the injection limiting seat 403 and the permeable brick is sealed, offering a better sealing effect compared to manual application.

[0041] Specifically, the inner wall dimensions of the sealing fixing seat 401 and the inner limiting ring 4032 are 10×10cm.

[0042] Combination Figure 3 The glue injection limiting seat 403 also includes multiple observation plates 4033 and multiple glue injection tubes 4034. The multiple observation plates 4033 and glue injection tubes 4034 are respectively disposed on the outside of the outer limiting ring 4031, and the multiple glue injection tubes 4034 are all connected to the glue injection gap. The glue injection status in the glue injection gap is observed and judged by the observation plates 4033, and sealant is injected into the glue injection gap through the glue injection tubes 4034.

[0043] Combination Figure 2 The extrusion positioning component 5 includes an extrusion top plate 501 and a lifting guide component. The extrusion top plate 501 is positioned above the water-blocking cover 3, and the inner wall dimension of the extrusion top plate 501 is smaller than the inner wall dimension of the water-blocking cover 3, while the outer wall dimension of the extrusion top plate 501 is larger than the outer wall dimension of the water-blocking cover 3. By extruding and limiting the water-blocking cover 3 from top to bottom through the extrusion top plate 501, the leakage of sealant along the contact position between the sealant injection limiting seat 403 and the permeable brick during the glue injection process is reduced. This also reduces the adverse effects of the shaking of the water-blocking cover 3 and the glue injection sealing component 4 on the glue injection effect, and ensures the stability of subsequent injection of sealant into the glue injection gap.

[0044] In addition, a clearance groove matching the liquid level sensor 7 is provided on one side of the extrusion top plate 501.

[0045] Combination Figure 2The lifting guide component includes an assembly frame 502, a threaded shaft 503, a lifting guide block 504, and a drive handle 505. The assembly frame 502 is fixedly mounted above the water tank 1. The threaded shaft 503 is rotatably mounted inside the assembly frame 502. The lifting guide block 504 is threaded onto the outside of the threaded shaft 503 and slidably mounted inside the assembly frame 502. One end of the threaded shaft 503 is fixedly connected to the extrusion top plate 501. The drive handle 505 is fixedly connected to the end of the threaded shaft 503 located outside the assembly frame 502. By controlling the rotation of the drive handle 505, the threaded shaft 503 is driven to rotate, causing the lifting guide block 504 to move up and down with the rotation of the threaded shaft 503 under the action of the thread, thereby driving the extrusion top plate 501 to move up and down synchronously.

[0046] In practical use, turn on the power supply (220V), place the permeable brick to be tested above the sample holder 2, and assemble the glue injection sealing component 4 at the bottom of the water-blocking cover 3 by the cooperation of the fixing ear plate 404 and the mounting bolt 405. Then, place the water-blocking cover 3 above the permeable brick to be tested. At this time, the bottom surface of the glue injection limiting seat 403 is in contact with the upper side surface of the permeable brick.

[0047] Then, by controlling the rotation of the drive handle 505, the threaded shaft 503 is rotated, which in turn causes the extrusion plate 501 to compress and limit the water-blocking cover 3 under the action of the lifting guide block 504, ensuring the stability of the water-blocking cover 3 during the test. After it is fixed, the sealant is injected into the sealant injection limiting seat 403 along the injection tube 4034. Under pressure, the sealant flows along the outer limiting ring 4031 and the inner limiting ring 4032. During the injection process, the injection status can be observed through the observation plate 4033. After the sealant solidifies, the seal between the sealant injection limiting seat 403 and the permeable brick is completed.

[0048] Then, the spray plate 9 is moved directly above the water-blocking cover 3, and the liquid level sensor 7 is fixed to one side of the water-blocking cover 3 as needed. Then, by controlling the operation of the metering pump, test water is sprayed from the spray plate 9 into the water-blocking cover 3 according to the set parameters to test the permeability of the permeable brick. When the water level in the water-blocking cover 3 reaches the warning position of the liquid level sensor 7, the spraying stops, and the test process is completed.

[0049] After use, the top extrusion plate 501 is raised to separate the glue injection limiting seat 403 from the permeable brick. The glue injection sealing component 4 can be reused by disassembling the sealant inside the glue injection limiting seat 403. When disassembling the sealant inside the glue injection limiting seat 403, the sealant can be pushed out along the anti-detachment discharge hole, simplifying the process of peeling the sealant out of the glue injection limiting seat 403.

[0050] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A device for testing the permeability rate of sand-based permeable bricks, characterized in that, include: The sample holder (1), sample rack (2), water barrier (3), glue injection sealing assembly (4), and extrusion positioning assembly (5) are provided. The sample rack (2) is fixedly installed above the water rack (1), the water barrier (3) is installed above the sample rack (2), and the glue injection sealing assembly (4) is fixedly installed at the bottom of the water barrier (3) to provide auxiliary sealing for the bottom of the water barrier (3). The glue injection sealing assembly (4) includes a sealing fixing seat (401), a sealing gasket (402), and a glue injection limiting seat (403). The sealing fixing seat (401) is fixedly installed at the bottom of the water-blocking cover (3). The sealing gasket (402) is installed between the sealing fixing seat (401) and the water-blocking cover (3) to seal the sealing fixing seat (401) and the water-blocking cover (3). The glue injection limiting seat (403) is fixedly installed below the sealing fixing seat (401) to perform glue injection sealing. The extrusion positioning component (5) is fixedly installed on one side of the water-blocking cover (3) to extrude and limit the water-blocking cover (3) from top to bottom.

2. The permeability rate testing device for sand-based permeable bricks according to claim 1, characterized in that: The water-blocking cover (3) has marking scale lines on one side, and an assembly block (6) is fixedly installed on the upper side of the water-blocking cover (3).

3. The permeability rate testing device for sand-based permeable bricks according to claim 2, characterized in that: A liquid level sensor (7) is slidably inserted into the assembly block (6), and a locking bolt (8) is threadedly connected to one side of the assembly block (6). The locking bolt (8) is used to lock and position the liquid level sensor (7).

4. The permeability rate testing device for sand-based permeable bricks according to claim 1, characterized in that: It also includes a spray plate (9), a water pipe (10) and a guide rod (11). The spray plate (9) is located directly above the water blocking cover (3). The water pipe (10) is inserted into the water inlet of the spray plate (9). The guide rod (11) is fixedly located on one side of the spray plate (9) and is used to support, position and adjust the spray plate (9).

5. The permeability rate testing device for sand-based permeable bricks according to claim 1, characterized in that: A pair of fixing ears (404) are integrally formed on the upper part of the sealing fixing seat (401), and each pair of fixing ears (404) is threaded with mounting bolts (405).

6. The permeability rate testing device for sand-based permeable bricks according to claim 5, characterized in that: The sealing fixing seat (401) has an assembly groove that matches the water-blocking cover (3). The sealing gasket (402) is set in the assembly groove. The bottom of the assembly groove has multiple anti-detachment and unloading holes. The sealing gasket (402) includes a ring body (4021) and multiple positioning posts (4022). The multiple positioning posts (4022) are fixedly set below the ring body (4021) and inserted into the multiple anti-detachment and unloading holes.

7. The permeability rate testing device for sand-based permeable bricks according to claim 6, characterized in that: The glue injection limiting seat (403) includes an outer limiting ring (4031) and an inner limiting ring (4032). The outer limiting ring (4031) and the inner limiting ring (4032) are both fixedly disposed below the sealing fixing seat (401). The outer limiting ring (4031) and the inner limiting ring (4032) cooperate to form a glue injection gap. The plurality of anti-detachment and unloading holes are connected to the glue injection gap. The outer limiting ring (4031) is sleeved on the outside of the inner limiting ring (4032), and the inner wall size of the inner limiting ring (4032) is the same as the inner wall size of the sealing fixing seat (401).

8. The permeability rate testing device for sand-based permeable bricks according to claim 7, characterized in that: The glue injection limiting seat (403) also includes multiple observation plates (4033) and multiple glue injection tubes (4034). The multiple observation plates (4033) and glue injection tubes (4034) are respectively disposed on the outside of the outer limiting ring (4031), and the multiple glue injection tubes (4034) are all connected to the glue injection gap.

9. The permeability rate testing device for sand-based permeable bricks according to claim 1, characterized in that: The extrusion positioning component (5) includes an extrusion top plate (501) and a lifting guide component. The extrusion top plate (501) is positioned above the water-blocking cover (3), and the inner wall dimension of the extrusion top plate (501) is smaller than the inner wall dimension of the water-blocking cover (3), while the outer wall dimension of the extrusion top plate (501) is larger than the outer wall dimension of the water-blocking cover (3).

10. The permeability rate testing device for sand-based permeable bricks according to claim 9, characterized in that: The lifting guide component includes an assembly frame (502), a threaded shaft (503), a lifting guide block (504), and a drive handle (505). The assembly frame (502) is fixedly installed above the water tank (1). The threaded shaft (503) is rotatably installed inside the assembly frame (502). The lifting guide block (504) is threadedly sleeved on the outside of the threaded shaft (503) and slidably installed inside the assembly frame (502). One end of the threaded shaft (503) is fixedly connected to the extrusion top plate (501). The drive handle (505) is fixedly connected to the end of the threaded shaft (503) located outside the assembly frame (502).

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