A permeameter for testing pressurized concrete

Abstract

The application discloses a kind of permeameters for pressurized concrete detection, including the hollow cylindrical test mould of appearance, for loading concrete sample;The inner cavity wall of the test mould is equipped with deformation sealing device, for sealing concrete;The test mould is equipped with pressurizing device, for pressurizing and decompressing deformation sealing device;The test mould is equipped with blocking device, for limiting pressurizing device, further, the deformation sealing device includes the liquid storage groove opened in the inner cavity wall of test mould, and the sealing layer is fixedly connected on the liquid storage groove.The application is provided with elastic sealing layer, when not pressurized, concrete sample can be easily placed into test mould after being wrapped with paraffin, and the sealing layer is expanded and extruded on the inner wall of concrete placed into test mould by the pressurizing of pressurizing screw, the pressurized sealing is completed, and the cumbersome operation of existing concrete sample placed into test mould is removed under the premise of ensuring high-pressure sealing.

Description

Technical Field

[0001] This application relates to the field of concrete testing technology, and in particular to a permeameter for testing pressurized concrete. Background Technology

[0002] When concrete is formed, pores or gaps are created inside, making it permeable. Testing the permeability of concrete allows construction workers to take targeted preventative measures in advance to avoid unnecessary quality and safety problems, and also helps construction companies save costs to the greatest extent possible.

[0003] Currently, the most common method for testing concrete permeability is the water seepage method. This method involves placing six concrete samples into six cylindrical molds, introducing pressurized water into the center of the bottom of the molds, increasing the water pressure every eight hours, until water seeps onto the surface of at least three concrete samples. The water pressure at this point is recorded, and the relevant data is substituted into a formula to obtain the test results.

[0004] In this process, six test molds need to be preheated to about 40 degrees Celsius to cause thermal expansion and increase the inner diameter of the molds. Then, the concrete sample coated with paraffin wax is placed into the heated mold, and the concrete sample is pressed into the thermally expanded mold using a pressure device. At this time, the mold gradually cools down, so that the inner wall of the mold fits into the side wall of the paraffin-coated concrete sample, forming a seal. This prevents water from seeping out from the side wall during testing, which could lead to inaccurate water pressure data. If this problem occurs, the sample needs to be removed and the sealing operation repeated.

[0005] During this process, the sealing procedure is complex, time-consuming, and labor-intensive. At the same time, when the pressure is applied into the mold, the sidewalls of the mold will rub against the paraffin wax, causing a large area of ​​paraffin wax to be scraped off, resulting in a decrease in the overall sealing performance. Summary of the Invention

[0006] This application proposes a permeameter for testing pressurized concrete, which has the advantages of directly placing the concrete sample into the mold, rotating the pressure screw to provide pressure, the extrusion plate pushing the pressure transmission plate to provide pressure to the hydraulic oil in the storage tank, the hydraulic oil transmitting pressure to the sealing layer to deform it, the deformed sealing layer sealing the sample under high pressure, the deformation of the sealing layer pulling the repulsion plate to provide power, and the repulsion plate pushing the insertion block into the limiting groove to absorb the reaction force, so as to solve the problem of cumbersome sealing of concrete molds in existing testing instruments.

[0007] To achieve the above objectives, this application adopts the following technical solution: a permeameter for testing pressurized concrete, comprising a hollow cylindrical mold for loading concrete samples;

[0008] The inner wall of the mold is equipped with a deformation sealing device for sealing the concrete.

[0009] The mold is equipped with a pressurizing device for pressurizing and depressurizing the deformation sealing device;

[0010] The test mold is equipped with a blocking device to limit the pressure device.

[0011] Furthermore, the deformation sealing device includes a liquid storage tank opened on the inner wall of the mold cavity, a sealing layer is fixedly connected to the liquid storage tank for sealing the side wall in contact with the concrete, and the liquid storage tank is filled with hydraulic oil for serving as a filler and for pressure transmission.

[0012] Furthermore, the liquid storage tank has an annular cross-section, and the sealing layer completely encloses the port of the liquid storage tank to provide all-round sealing for the sidewall of the concrete. The sealing layer is made of an elastic material for deformation sealing. The sealing layer has evenly distributed recessed areas on one side facing the center line of the mold. The recessed areas are rectangular in shape, and the thickness of the sealing layer in the recessed areas is less than the thickness of other parts of the sealing layer to form grooves under different deformation conditions.

[0013] Furthermore, the pressurizing device includes two symmetrical movable cavities at the bottom of the mold to provide space for movement. Each movable cavity contains a pressing plate and a pressure transmitting plate, which move within the cavity to transmit pressure to the hydraulic oil in the reservoir. A uniformly distributed reciprocating spring I is fixedly connected to one end of the pressure transmitting plate away from the pressing plate. The other end of the reciprocating spring I is fixedly connected to one end of the movable cavity to drive the pressure transmitting plate to reset. The mold has two symmetrical threaded holes, each threaded with a pressurizing screw. A hinged ball is located at the bottom of the pressurizing screw to press the pressing plate.

[0014] Furthermore, one end of the movable cavity is provided with a channel that connects to the liquid storage tank. The channel is located at the end where the reciprocating spring I connects to the movable cavity, with the pressure transmission plate as the dividing line. The space at one end of the channel in the movable cavity is filled with hydraulic oil, which is used to transmit the pressure of the pressure transmission plate movement to the hydraulic oil in the liquid storage tank.

[0015] Furthermore, the extrusion plate is shaped like a right-angled triangle, and one end of the pressure transmission plate is attached to the right-angled side of the extrusion plate to receive the pressure applied by the extrusion plate. The threaded hole is located near the top of the inclined side of the extrusion plate in the vertical direction, so that when the pressure screw is pressed down, the hinged ball presses on the inclined side of the extrusion plate.

[0016] Furthermore, the threaded hole passes vertically through the movable cavity to allow the pressure screw to move a sufficient distance. The diameter of the threaded hole is greater than the width of the movable cavity. The portion of the threaded hole that passes through the movable cavity forms a threaded groove on the inner wall of the movable cavity to limit the position of the pressure screw.

[0017] Furthermore, a limiting groove is formed at the bottom of one end of the extrusion plate facing the liquid storage tank. The limiting groove is vertical and is far away from the pressure transmission plate to ensure that the pressure transmission plate can move a sufficiently long distance.

[0018] Furthermore, the blocking device includes a receiving groove on the side wall of the movable cavity, a plug-in block inside the receiving groove for limiting the position with the limiting groove, a reciprocating spring II on one end of the plug-in block and one end of the receiving groove for driving the plug-in block to reset, two symmetrical sliding grooves on the bottom of the liquid storage tank, a repulsion plate movably sleeved in the sliding groove, a reciprocating spring III fixedly connected to one end of the reciprocating plate, one end of the reciprocating spring III fixedly connected to one end of the sliding groove for driving the repulsion plate to reset, a pull rope on one end of the repulsion plate, and the other end of the pull rope fixedly connected to the center of one of the recessed areas for receiving the force when the recessed area deforms.

[0019] Furthermore, one end of the plug block is provided with a magnet, and the repulsion plate is made of a magnetic magnet and repels the magnet on the plug block, thereby providing power to the plug block.

[0020] This application provides a permeameter for testing pressurized concrete. With an elastic sealing layer, the concrete sample, after being coated with paraffin, can be easily placed into the mold without pressure. At the same time, the sealing layer expands and is pressed against the inner wall of the concrete placed in the mold by the pressure screw, thus completing the pressure seal. Under the premise of ensuring high-pressure sealing, this eliminates the cumbersome operation of placing the concrete sample into the mold.

[0021] Simultaneously, by rotating the pressure screw and continuously pressing it down in the threaded hole, the hinged ball is pressed against the inclined edge of the extrusion plate. This causes the extrusion plate to move the pressure transmission plate towards the channel connecting the movable cavity and the storage tank. The pressure transmission plate then presses the hydraulic oil in the movable cavity into the storage tank, thereby increasing the total amount of hydraulic oil in the storage tank and raising the pressure. This causes the sealing layer to expand and deform under the high-pressure hydraulic oil, thus completing the high-pressure sealing of the concrete sample.

[0022] At the same time, the deformation difference between the recessed area and other parts of the sealing layer forms a groove in the recessed area. When water leaks and is pressed into the groove, it will continue to accumulate and fill the recessed area. This causes the water pressure in this area to act on the sealing layer, and transmits the pressure to other parts of the sealing layer for pressure compensation. This further compresses the concrete in other parts and maintains a high-pressure seal.

[0023] At the same time, the deformation of the middle part of the recessed area causes the repulsion plate to move to the position opposite to the plug block by pulling the rope. The repulsion plate applies a repulsive force to the plug block, causing the plug block to insert into the limiting groove. The reaction force received by the extrusion plate is transmitted to the test mold through the plug block, avoiding the problem of the hinge ball being subjected to force alone, which would cause the pressure screw to be damaged under high pressure. Attached Figure Description

[0024] The accompanying drawings, which form part of this specification, illustrate embodiments disclosed in this application and, together with the specification, serve to explain the principles disclosed in this application.

[0025] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is a diagram of the internal structure of the prototype mold of the present invention;

[0028] Figure 3 This is a schematic diagram showing the relative positions of the repulsion plate and the insertion block in this invention;

[0029] Figure 4 This is a schematic diagram of the extrusion plate position structure of the present invention;

[0030] Figure 5 For the present invention Figure 4 Enlarged view of a portion of the structure at point A;

[0031] Figure 6 This is a schematic diagram showing the position of the movable cavity in this invention;

[0032] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point B in the middle;

[0033] Figure 8 This is a schematic diagram showing the relative positions of the extrusion plate and the movable cavity in this invention.

[0034] Figure 9 This is a schematic diagram of the three-dimensional structure of the extrusion plate of the present invention;

[0035] Figure 10 This is a schematic diagram of the three-dimensional structure of the pressure screw of the present invention.

[0036] Figure label:

[0037] 1. Trial mold; 2. Liquid storage tank; 3. Sealing layer; 4. Recessed area; 5. Movable cavity; 6. Extrusion plate; 601. Limiting groove; 7. Pressure transmission plate; 8. Reciprocating spring I; 9. Pressure screw; 10. Hinge ball; 11. Storage groove; 12. Insert block; 13. Reciprocating spring II; 14. Sliding groove; 15. Reciprocating spring III; 16. Repulsion plate; 17. Pull rope; 18. Threaded hole. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0039] Example 1

[0040] Please see Figures 1 to 4 , Figure 6 , Figure 8 A permeameter for testing pressurized concrete includes a mold 1, which is a hollow cylinder. A cylindrical concrete sample is placed inside the mold 1. A liquid storage tank 2 is formed on the inner wall of the mold 1, and the liquid storage tank 2 is filled with hydraulic oil to transmit pressure changes within the liquid storage tank 2 and to provide pressurized filling material. The liquid storage tank 2 has an annular cross-section, allowing it to provide pressure to a sealing layer 3 that wraps around the sidewall of the cylindrical concrete sample from 360 degrees. A sealing layer 3 is fixedly connected to the liquid storage tank 2, completely enclosing the port of the liquid storage tank 2. This allows pressure changes of the hydraulic oil within the liquid storage tank 2 to be fully transmitted to the sealing layer 3, enabling the sealing layer 3 to pressurize and seal the sidewall of the concrete under expansion. The sealing layer 3 is made of an elastic material, such as rubber, allowing it to deform under pressure changes. The sealing layer 3 faces the test sample. A rectangular recessed area 4 is evenly distributed on one side of the center line of mold 1. The thickness of the sealing layer 3 in the recessed area 4 is less than that in other parts of the sealing layer 3. When the sealing layer 3 expands, the middle part of the recessed area 4 expands and presses against the side wall of the concrete. The expansion degree of the recessed area 4 further away from the middle is less due to the shape. This forms a groove between the middle of the recessed area 4 and the sealing layer 3. When water is pressed into this groove, the water will gradually fill the groove and pressurize it. At this time, the water pressure will press on the surface of the recessed area 4, causing the recessed area 4 to transmit the pressure to the hydraulic oil in the reservoir 2. The hydraulic oil will then transmit the pressure to other parts of the sealing layer 3, forming pressure compensation. This increases the expansion degree of other parts of the sealing layer 3, increases the pressure on the side wall of the concrete, and maintains a high sealing state.

[0041] See Figures 3 to 8The bottom of the mold 1 has two symmetrical movable cavities 5. One end of each movable cavity 5 has a channel that connects to the liquid storage tank 2. When the pressure plate 7 in the movable cavity 5 is pressed by the extrusion plate 6, the pressure plate 7 will gradually move towards the channel connecting the movable cavity 5 and the liquid storage tank 2. This will press the hydraulic oil in the space connecting the movable cavity 5 and the liquid storage tank 2 into the liquid storage tank 2, increasing the total amount of hydraulic oil in the liquid storage tank 2. The increased hydraulic oil in the liquid storage tank 2 will cause the sealing layer 3 to expand, and the expanded sealing layer 3 will press against the concrete side wall to complete the high-pressure seal. The height of the movable cavity 5 is the same as the height of the liquid storage tank 2, so that the movable cavity 5 can provide enough hydraulic oil to the liquid storage tank 2 to ensure the degree of expansion of the sealing layer 3 and the pressure on the concrete side wall. The cross-section of the movable cavity 5 is arc-shaped, and the extrusion plate 6 is movably sleeved inside the movable cavity 5. The cross-section of the extrusion plate 6 is also arc-shaped, so that the extrusion plate 6 can move smoothly within the movable cavity 5.

[0042] See Figure 2 , Figure 4 , Figure 9 The extrusion plate 6 is shaped like a right-angled triangle. A uniformly distributed reciprocating spring I8 is fixedly connected to one end of the movable cavity 5 opposite the right-angled side of the extrusion plate 6. A pressure transmission plate 7 is fixedly connected to one end of each reciprocating spring I8. When the pressure transmission plate 7 is displaced by the pressure of the extrusion plate 6, the reciprocating spring I8 can compress and store energy. When the pressure of the extrusion plate 6 is removed, the compressed reciprocating spring I8 can drive the pressure transmission plate 7 to move and reset, providing extra space for excess hydraulic oil in the reservoir 2. This allows the sealing layer 3 to depressurize and return to its original position, eliminating the need for pressurization and sealing of the concrete. One end of the pressure transmission plate 7 is attached to the right-angled side of the extrusion plate 6, allowing the extrusion plate 6 to press and move the pressure transmission plate 7. The pressure plate 7 has an arc-shaped cross-section, allowing it to move smoothly within the movable cavity 5. The channel connecting the movable cavity 5 and the reservoir 2 is located on one side of the reciprocating spring I8. The pressure plate 7 is movably sleeved within the movable cavity 5. The side walls of the pressure plate 7 and the pressure plate 6 are adapted to the side walls of the movable cavity 5. Both the pressure plate 7 and the pressure plate 6 are equipped with sealing rings. With the pressure plate 7 as the dividing line, the end of the movable cavity 5 near the channel connecting to the reservoir 2 is filled with hydraulic oil. This prevents the hydraulic oil in the movable cavity 5 from leaking towards the pressure plate 6, thus avoiding hydraulic oil leakage when the pressure plate 6 presses the pressure plate 7 to move, which would reduce the total amount of hydraulic oil replenished in the reservoir 2 and decrease the pressure.

[0043] See Figures 1 to 4 , Figure 10The trial mold 1 has two symmetrical threaded holes 18. A pressure screw 9 is threaded into each threaded hole 18. A hinge ball 10 is hinged to the bottom end of the pressure screw 9. The diameter of the hinge ball 10 is smaller than the width of the movable cavity 5. The threaded holes 18 are positioned vertically near the top of the inclined edge of the extrusion plate 6, allowing the pressure screw 9 to press against the inclined edge of the extrusion plate 6 via the hinge ball 10 when it is pressed down. This reduces contact friction while simultaneously causing the hinge ball 10 to press the extrusion plate 6 towards the pressure transmission plate 7, causing the pressure transmission plate 7 to move synchronously under force. The threaded holes 18 pass vertically through the movable cavity 5, allowing the pressure screw 9 to continuously press down. The pressure is applied until it reaches the bottom of the extrusion plate 6, causing the extrusion plate 6 to move a sufficient distance. The diameter of the threaded hole 18 is greater than the width of the movable cavity 5. The portion of the threaded hole 18 that passes through the movable cavity 5 forms a threaded groove on the inner wall of the movable cavity 5. This allows the pressure screw 9 to continue rotating and moving under the constraint of the threaded groove on the inner wall of the movable cavity 5 as it moves continuously in the threaded hole 18. This prevents the pressure screw 9 from becoming suspended in the movable cavity 5, thus avoiding the problem of the suspended pressure screw 9 applying pressure to the extrusion plate 6 based on its own strength, and causing the suspended pressure screw 9 to be damaged when subjected to a reaction force.

[0044] Example 2

[0045] Based on Example 1

[0046] Please see Figure 2 , Figures 4 to 5 , Figures 8 to 9 The top of the inclined edge of the extrusion plate 6 is rounded, so that when the top of the inclined edge of the extrusion plate 6 is no longer in the same position as the hinge ball 10 due to excessive recovery, the hinge ball 10 can still press the extrusion plate 6 to move by pressing the rounded corner at the top of the inclined edge. A limiting groove 601 is opened at the bottom of the end of the extrusion plate 6 facing the liquid storage tank 2, so that the limiting groove 601 receives the plug block 12, so that most of the reaction force on the extrusion plate 6 is transmitted to the plug block 12, and then transmitted to the test mold 1 through the plug block 12, reducing the damage to the pressure screw 9 by the reaction force. The limiting groove 601 is vertical and far away from the pressure transmission plate 7, so that the extrusion plate 6 will meet the plug block 12 after pressing the pressure transmission plate 7 to move a sufficient distance, so that the pressure transmission plate 7 can provide sufficient pressure to the hydraulic oil in the liquid storage tank 2.

[0047] See Figures 3 to 7A receiving groove 11 is provided on the side of the active cavity 5 near the liquid storage tank 2. The receiving groove 11 is located at the end of the extrusion plate 6 near the pressure transmission plate 7, so that the insertion block 12 will protrude from the receiving groove 11 and insert into the limiting groove 601 after the extrusion plate 6 has pressed the pressure transmission plate 7 a sufficient distance. The cross-section of the receiving groove 11 is T-shaped, and the insertion block 12 is movably sleeved in the receiving groove 11. The cross-section of the insertion block 12 is also T-shaped, so that the insertion block 12 will not detach from the receiving groove 11 when it protrudes from the receiving groove 11 and inserts into the limiting groove 601. The minimum width of the insertion block 12 is equal to the width of the limiting groove 601, and the height of the insertion block 12 is equal to the height of the limiting groove 601, so that the insertion block 12 can be inserted into the limiting groove. Inside 601, a reciprocating spring II 13 is fixedly connected to one end of the storage groove 11 near the movable cavity 5. The other end of the reciprocating spring II 13 is fixedly connected to the T-shaped protrusion of the plug-in block 12. When the plug-in block 12 protrudes out of the storage groove 11, the reciprocating spring II 13 can be compressed and stored. When the repulsive force of the repulsion plate 16 is removed, the compressed reciprocating spring II 13 can drive the plug-in block 12 to reset and disengage from the limiting groove 601, so as to prevent the plug-in block 12 from restricting the resetting of the compression plate 6. The T-shaped protrusion of the plug-in block 12 is a magnet with magnetic properties, so that when the repulsion plate 16 moves to the relative position of the plug-in block 12, the repulsion plate 16 can repel the magnet on the plug-in block 12, so that the plug-in block 12 protrudes out of the storage groove 11.

[0048] See Figure 3 , Figures 6 to 7 Two symmetrical sliding grooves 14 are provided at the bottom of the liquid storage tank 2. The sliding grooves 14 are close to the movable cavity 5, so that the repulsion plate 16 can approach the insertion block 12 when it moves, providing a sufficiently strong repulsive force. The cross-section of the sliding groove 14 is arc-shaped and the vertical section of the sliding groove 14 is T-shaped. The repulsion plate 16 is movably sleeved in the sliding groove 14. The cross-section of the repulsion plate 16 is arc-shaped and the vertical section of the repulsion plate 16 is T-shaped, so that the repulsion plate 16 is restricted by the sliding groove 14 and can only slide in the sliding groove 14. The repulsion plate 16 is a magnet with magnetism and repulses the magnet on the insertion block 12.

[0049] See Figures 2 to 7One end of the repulsion plate 16 is fixedly connected to a reciprocating spring III 15. One end of the reciprocating spring III 15 is fixedly connected to one end of the sliding groove 14. When the repulsion plate 16 moves towards the insertion block 12 under the tension of the pull rope 17 to provide repulsion, the reciprocating spring III 15 can stretch and store energy. When the repulsion plate 16 loses the tension of the pull rope 17, the stretched reciprocating spring III 15 can drive the repulsion plate 16 to reset and move away from the insertion block 12. One end of the repulsion plate 16 near the insertion block 12 is fixedly connected to a pull rope 17. The other end of the pull rope 17 is fixedly connected to the sealing layer 3. The connection part of the pull rope 17 and the sealing layer 3 is located in the middle of the recessed area 4 near one of the channels that connect the active cavity 5 and the liquid storage tank 2. When the recessed area 4 expands, the expansion degree in the middle is the greatest. The pull rope 17 is pulled by the expansion deformation in the middle of the recessed area 4 and moves the repulsion plate 16 towards the insertion block 12.

Claims

1. A permeameter for testing pressurized concrete, characterized in that, Includes a hollow cylindrical test mold (1) used to load concrete samples; The inner wall of the mold (1) is provided with a deformation sealing device for sealing the concrete; The test mold (1) is equipped with a pressurizing device for pressurizing and depressurizing the deformation sealing device; The test mold (1) is equipped with a blocking device to limit the pressure device; The deformation sealing device includes a liquid storage tank (2) opened on the inner wall of the mold (1), and a sealing layer (3) is fixedly connected to the liquid storage tank (2) for sealing the side wall in contact with the concrete. The liquid storage tank (2) is filled with hydraulic oil for use as a filler and for pressure transmission. The pressurizing device includes two symmetrical movable cavities (5) opened at the bottom of the test mold (1) to provide space for movement. The movable cavity (5) is provided with a squeezing plate (6) and a pressure transmitting plate (7) for moving within the movable cavity (5) and transmitting pressure to the hydraulic oil in the reservoir (2). One end of the pressure transmitting plate (7) away from the squeezing plate (6) is fixedly connected with a uniformly distributed reciprocating spring I (8). The other end of the reciprocating spring I (8) is fixedly connected to one end of the movable cavity (5) for driving the pressure transmitting plate (7) to reset. The test mold (1) is provided with two symmetrical threaded holes (18). A pressure screw (9) is threadedly connected in the threaded hole (18). The bottom of the pressure screw (9) is provided with a hinge ball (10) for pressing the squeezing plate (6).

2. The permeameter for testing pressurized concrete according to claim 1, characterized in that, The liquid storage tank (2) has an annular cross-section. The sealing layer (3) completely wraps the port of the liquid storage tank (2) and is used to seal the side wall of the concrete in all directions. The sealing layer (3) is made of elastic material and is used for deformation sealing. The sealing layer (3) has a uniformly distributed recessed area (4) on one side facing the center line of the test mold (1). The recessed area (4) is rectangular in shape. The thickness of the sealing layer (3) in the recessed area (4) is less than the thickness of other parts of the sealing layer (3) and is used to form a groove under different deformation conditions.

3. The permeameter for testing pressurized concrete according to claim 1, characterized in that, One end of the movable cavity (5) is provided with a channel that connects to the liquid storage tank (2). The channel is located at the end where the reciprocating spring I (8) connects to the movable cavity (5). With the pressure plate (7) as the dividing line, the space at one end of the channel of the movable cavity (5) is filled with hydraulic oil, which is used to transmit the pressure of the pressure plate (7) to the hydraulic oil in the liquid storage tank (2).

4. The permeameter for testing pressurized concrete according to claim 1, characterized in that, The extrusion plate (6) is shaped like a right triangle. One end of the pressure transmission plate (7) is attached to the right-angled side of the extrusion plate (6). The pressure transmission plate (7) is used to receive the pressure applied by the extrusion plate (6). The threaded hole (18) is located at the top of the inclined side of the extrusion plate (6) in the vertical direction. When the pressure screw (9) is pressed down, the hinge ball (10) is pressed on the inclined side of the extrusion plate (6).

5. The permeameter for testing pressurized concrete according to claim 1, characterized in that, The threaded hole (18) passes vertically through the movable cavity (5) to allow the pressure screw (9) to move a sufficient distance. The diameter of the threaded hole (18) is greater than the width of the movable cavity (5). The portion of the threaded hole (18) that passes through the movable cavity (5) forms a threaded groove on the inner wall of the movable cavity (5) to limit the position of the pressure screw (9).

6. The permeameter for testing pressurized concrete according to claim 1, characterized in that, The pressure plate (6) has a limiting groove (601) at the bottom of one end facing the liquid storage tank (2). The limiting groove (601) is vertical and is far away from the pressure transmission plate (7) to ensure that the pressure transmission plate (7) moves a sufficient distance.

7. The permeameter for testing pressurized concrete according to claim 6, characterized in that, The blocking device includes a storage groove (11) on the side wall of the movable cavity (5). The storage groove (11) is provided with a plug-in block (12) for use with the limiting groove (601) for limiting. One end of the plug-in block (12) and one end of the storage groove (11) are provided with a reciprocating spring II (13) for driving the plug-in block (12) to reset. The bottom end of the liquid storage tank (2) is provided with two symmetrical sliding grooves (14). A repulsion plate (16) is movably sleeved in the sliding groove (14). One end of the repulsion plate (16) is fixedly connected with a reciprocating spring III (15). One end of the reciprocating spring III (15) is fixedly connected with one end of the sliding groove (14) for driving the repulsion plate (16) to reset. One end of the repulsion plate (16) is provided with a pull rope (17). The other end of the pull rope (17) is fixedly connected to the middle of one of the recessed areas (4) for receiving the force when the recessed area (4) deforms.

8. The permeameter for testing pressurized concrete according to claim 7, characterized in that, One end of the plug-in block (12) is provided with a magnet, and the repulsion plate (16) is made of a magnet with magnetic properties and repels the magnet on the plug-in block (12) to provide power to the plug-in block (12).

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