Full-automatic concrete impermeability instrument

Abstract

The utility model relates to the field of concrete anti-permeability instruments, and discloses a full-automatic concrete anti-permeability instrument which comprises an anti-permeability instrument body and a plurality of mold testing set sets, and mold testing grooves distributed in a row-column matrix mode are formed in the top end of the anti-permeability instrument body and used for containing the mold testing set sets. A water injection head is fixedly arranged at the position, corresponding to the center of the bottom end of the interior of each test mold groove, of the anti-permeability instrument body, the anti-permeability instrument further comprises material ejecting structures arranged in all the test mold grooves and locking structures arranged in all the test mold grooves, and the locking structures are matched with the bottoms of the test mold sets after the test mold sets are assembled and placed; by means of the full-automatic concrete anti-permeability instrument, the stable state of the test mold set can be guaranteed, and displacement or shaking of the test mold set in the anti-permeability detection process is effectively prevented; and the stability of an anti-permeability detection environment is ensured, so that the accuracy and the reliability of a detection result are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of concrete impermeameter, concretely to a full -automatic concrete impermeameter. BACKGROUND

[0002] In the field of construction engineering, the impermeability of concrete is a key indicator, which is directly related to the durability and waterproof performance of the concrete structure. Therefore, impermeability detection of concrete test pieces is an important link to ensure the quality of the project. Traditional concrete impermeability testing usually needs to use an impermeameter, by applying water pressure to the concrete test piece sealed in the test mold, observing the water seepage of the test piece within a certain time, to evaluate its impermeability. The traditional impermeameter often needs manual operation when placing the test mold in the test position and taking out the test mold after testing, which is tedious and labor-intensive. The operator may need to use tools or through complex manual operation to accurately place the test mold in the test position, not only low efficiency, but also easy to cause the test mold to be placed inaccurately due to the instability of human operation, thereby affecting the accuracy of the subsequent test results. In addition, the test mold removal process is also difficult, which may cause damage to the test mold or impermeameter due to improper operation. And the fixing method of the traditional impermeameter for the test mold is not perfect, which may generally use simple bolts, clamps or other simple fixing devices. These fixing methods may have the following problems:

[0003] Poor fixing effect: During the impermeability test, a certain water pressure needs to be applied to the concrete test piece in the test mold, which may generate a large pressure, causing the test mold to be subjected to an upward force. The traditional fixing device may not be able to effectively withstand this pressure, causing the test mold to loosen or displace during testing, affecting the accuracy and reliability of the test. Therefore, we propose a full-automatic concrete impermeameter. SUMMARY

[0004] (I) Technical problems solved

[0005] In view of the deficiencies of the prior art, the utility model provides a full-automatic concrete impermeameter, which solves the above problems.

[0006] (II) Technical solutions

[0007] To achieve the above purposes, the utility model provides the following technical solutions: a full-automatic concrete impermeameter, comprising an impermeameter body and a plurality of test mold sets, the top end of the impermeameter body is provided with test mold grooves in a row-column matrix distribution for placing the test mold sets, and the bottom center of each test mold groove inside the impermeameter body is fixedly provided with a water injection head, further comprising:

[0008] A top material structure is arranged in each group of test mold groove, which is used to lift or sink the test mold set group to complete the test mold set group or place;

[0009] A locking structure is arranged in each group of test mold groove, which is matched with the bottom of the test mold set group after placement, and is used to press and lock the test mold groove after the test mold set group is placed in the test mold groove.

[0010] Preferably, the inner diameter of the test mold groove is greater than the maximum width diameter of the test mold set group as a whole, the test mold set group includes a flange disc at the bottom end, and the center of the corresponding flange disc of the test mold set group is provided with a through hole matched with the water injection head.

[0011] Preferably, the top material structure arranged in each group of test mold groove includes a circular groove, an electric telescopic cylinder and a supporting ring, the bottom inner wall of the anti-permeation instrument body corresponding to each group of test mold groove is provided with a through-type circular groove, and the inside of the anti-permeation instrument body is fixedly installed with two groups of vertical electric telescopic cylinders below each group of test mold groove, and the piston top end of the two groups of electric telescopic cylinders below each group of test mold groove is fixedly connected with a supporting ring matched with the circular groove, the supporting ring is slidably filled in the circular groove, and the upper surface of the supporting ring is flush with the bottom inner wall of the test mold groove.

[0012] Preferably, the axis of each group of test mold groove is located on the same horizontal line as the axes of the corresponding internal water injection head, circular groove and supporting ring, and the outer diameter of the supporting ring is the same as the diameter of the flange disc at the bottom of the test mold set group.

[0013] Preferably, the locking structure arranged in each group of test mold groove includes multiple groups of pressing circular arc plates, multiple groups of transverse displacement limiting grooves and multiple groups of transmission clamping columns, the inside of the anti-permeation instrument body is provided with a rectangular cavity communicated with the test mold groove corresponding to multiple groups of test mold grooves, the bottom end of the rectangular cavity is higher than the bottom end of the test mold groove, the height difference between the bottom inner wall of the rectangular cavity and the bottom inner wall of the test mold groove is the same as the thickness of the flange disc, the bottom inner wall of the rectangular cavity is provided with four groups of transverse displacement limiting grooves in a ring shape and equidistantly distributed corresponding to the outer circle of each group of test mold groove, and the adjacent two groups of transverse displacement limiting grooves are perpendicular to each other, each group of transverse displacement limiting groove is slidably clamped with a vertical transmission clamping column corresponding to the port away from the test mold groove, and each group of transmission clamping column is fixedly connected with a pressing circular arc plate, the bottom end of the pressing circular arc plate is slidably attached to the bottom inner wall of the rectangular cavity, that is, four groups of pressing circular arc plates in a ring shape and equidistantly distributed are arranged corresponding to the outer circle of each group of test mold groove in the rectangular cavity, and the ring-shaped inner diameter surrounded by the four groups of pressing circular arc plates is smaller than the inner diameter of the test mold groove and greater than the diameter of the flange disc.

[0014] Preferably, the locking structure further comprises a plurality of gear rings, the row distance and the column distance between the plurality of test mold grooves distributed in a matrix in the anti-permeability instrument body are the same, the bottom inner wall of the rectangular cavity is provided with a plurality of limit arc grooves in a ring shape and equidistantly distributed corresponding to the outer circle of each group of test mold grooves, and each group of limit arc grooves is located between the adjacent two groups of transverse movement limiting grooves, the bottom end of each group of the gear rings is fixedly provided with four groups of integrated limit arc plates in a ring shape and equidistantly distributed, and the limit arc plates are matched with the limit arc grooves, each group of the gear rings is rotatably clamped in the four groups of limit arc grooves provided on the outer circle of each group of test mold grooves through the four groups of limit arc plates at the bottom, and the bottom end and the top end of each group of the gear rings are respectively in sliding fit with the top end outer wall of the compression arc plate and the top end inner wall of the rectangular cavity, four groups of arc transmission grooves in a ring shape and equidistantly distributed and symmetric about the center corresponding to the four groups of compression arc plates below are provided on each group of the gear rings, the top end of the transmission clamping column on the four groups of compression arc plates in a ring shape extends upwards and is correspondingly clamped and connected in the four groups of arc transmission grooves on each group of the gear rings, and the top end of each group of the transmission clamping column is correspondingly clamped at the end near the outer circle of each group of the arc transmission grooves

[0015] Preferably, the plurality of gear rings in the rectangular cavity are distributed in a matrix of rows and columns corresponding to the plurality of test mold grooves, and the adjacent two groups of gear rings are engaged with each other, and the distribution of the arc transmission grooves and the limit arc plates on the adjacent two groups of gear rings is relatively symmetrical, a servo motor is fixedly installed at the lower end side of the test mold groove in the interior of the anti-permeability instrument body, and the output end of the servo motor penetrates through the bottom inner wall of the rectangular cavity and is fixedly connected with a driving gear, and the driving gear is engaged with a group of gear rings located at the end side.

[0016] Preferably, the transverse interval difference between the two ends of each group of arc transmission grooves on the gear ring is the same as the opening length of the transverse movement limiting groove and is greater than the difference between the inner diameter of the ring formed by the four groups of compression arc plates and the diameter of the flange plate.

[0017] (Three) beneficial effects

[0018] Compared with the prior art, the full-automatic concrete anti-permeability instrument has the following beneficial effects:

[0019] Efficient and convenient test mold set operation:

[0020] The top-mounted structure design greatly facilitates the placement and removal of the mold set. Driven by an electric telescopic cylinder, the support ring rises and falls within the annular groove, precisely adjusting it to be flush with the top or bottom inner wall of the mold recess. This allows operators to smoothly place the mold set onto the support ring, ensuring it accurately falls into the mold recess and that the bottom flange base fits tightly against the bottom of the recess. Simultaneously, the water injection head smoothly aligns with the through-hole of the flange base. Compared to traditional manual placement and adjustment methods, this automated operation significantly improves work efficiency, reduces the difficulty and labor intensity of manual operation, and effectively avoids problems such as inaccurate mold placement or damage caused by improper manual operation.

[0021] A robust and reliable mold-locking effect:

[0022] The locking structure, comprising multiple sets of clamping arc plates, transverse limiting grooves, transmission pins, and gear rings, works together to reliably lock the test mold assembly within the test mold groove. When the servo motor drives the drive gear to rotate, causing the meshing gear rings to rotate synchronously and relative to each other, the arc transmission grooves on the gear rings, through the transmission pins, push the clamping arc plates to precisely retract or expand under the guidance of the transverse limiting grooves. Because the height difference between the rectangular cavity and the bottom inner wall of the test mold groove matches the thickness of the flange base, the four sets of clamping arc plates can tightly fit against the upper surface of the clamping flange base, firmly fixing the test mold assembly within the test mold groove. This stable locking effectively prevents displacement or shaking of the test mold assembly during the seepage resistance testing process due to water pressure or equipment vibration, thus ensuring the stability of the seepage resistance testing environment and consequently ensuring the accuracy and reliability of the test results.

[0023] Simultaneous processing capability for multiple trial molds:

[0024] The permeability testing instrument features a matrix-like arrangement of mold grooves at the top, along with multiple sets of ejector and locking structures, enabling it to process multiple sets of molds simultaneously. This allows for large-scale permeability testing of concrete specimens, enabling simultaneous testing of multiple specimens, significantly improving testing efficiency, shortening the overall testing cycle, and facilitating the acquisition of more data within a limited timeframe. This provides richer evidence for research on concrete permeability performance and engineering quality control.

[0025] Structural design optimization and accuracy improvement:

[0026] The meticulous design of components such as the mold groove, water injection head, and support ring, with their axes aligned on the same horizontal line, along with the refined structure of the gear ring, arc transmission groove, and transverse movement limiting groove, ensures the stability and coordination of the entire equipment during operation. For example, the rational design of the lateral spacing difference between the two ends of the arc transmission groove on the gear ring, the opening length of the transverse movement limiting groove, and the difference between the inner diameter of the ring formed by the clamping arc plate and the diameter of the flange base, ensures the accuracy and effectiveness of the clamping arc plate's movement. This optimized structural design improves the overall performance of the equipment, reduces errors that may arise from structural inconsistencies, and further enhances the accuracy of the impermeability test results. This allows the test data to more accurately reflect the impermeability performance of the concrete specimens, providing strong data support for concrete material research and development, and engineering quality assessment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 This is a cross-sectional schematic diagram of the body of the permeability tester of this utility model;

[0029] Figure 3 for Figure 3 A magnified view of part A in the diagram;

[0030] Figure 4 This is a schematic diagram of the locking structure of this utility model;

[0031] Figure 5 This is a schematic diagram showing the distribution of the pressing arc plates in the locking structure of this utility model;

[0032] Figure 6 This is an exploded view of the locking structure of this utility model.

[0033] In the diagram: 1. Permeability tester body; 2. Test mold groove; 3. Test mold assembly; 4. Water injection head; 5. Circular groove; 6. Electric telescopic cylinder; 7. Support ring; 8. Flange base; 9. Rectangular cavity; 10. Gear ring; 11. Drive gear; 12. Circular arc transmission groove; 13. Pressing arc plate; 14. Lateral movement limiting groove; 15. Transmission pin; 16. Limiting arc groove; 17. Limiting arc plate. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Please seeFigures 1-6 An automatic concrete permeability tester includes a tester body 1 and multiple sets of test mold sets 3. The top of the tester body 1 has test mold grooves 2 arranged in a row-column matrix for filling the test mold sets 3. A water injection head 4 is fixed at the center of the bottom of each test mold groove 2, serving as the placement position for the test mold sets 3. Its specific size design ensures that the test mold sets 3 can be easily placed and removed. Furthermore, through cooperation with the water injection head 4, water pressure can be accurately supplied to the concrete specimens after the test mold sets 3 are placed in position for permeability testing. Its matrix distribution facilitates simultaneous testing of multiple test mold sets 3, improving testing efficiency. The tester body 1 also includes:

[0036] A top material structure is provided in each set of mold grooves 2. The top material structure is used to lift or lower the mold set 3 to complete the removal or placement of the mold set 3.

[0037] A locking structure is provided in each set of test mold grooves 2. This locking structure cooperates with the bottom of the test mold set 3 after it is placed, and is used to press and lock the test mold groove 2 after the test mold set 3 is placed in the test mold groove 2.

[0038] The inner diameter of the mold groove 2 is larger than the maximum width diameter of the entire mold assembly 3. The mold assembly 3 includes a flange base 8 at the bottom, and a through hole corresponding to the center of the flange base 8 is provided to fit the water injection head 4 for holding the concrete specimen. The flange base 8 not only supports the entire mold assembly 3, but also maintains stability during testing through its cooperation with the bottom inner wall of the mold groove 2 and the locking structure. The through hole in the center allows the water injection head 4 to transfer water pressure to the concrete specimen, thereby achieving the testing of impermeability.

[0039] The top material structure set in each set of test mold grooves 2 includes an annular groove 5, an electric telescopic cylinder 6, and a support ring 7. The bottom inner wall of the permeability tester body 1 is provided with a through annular groove 5 corresponding to each set of test mold grooves 2. Inside the permeability tester body 1, two sets of vertical electric telescopic cylinders 6 are fixedly installed below each set of test mold grooves 2. The piston top of the two sets of electric telescopic cylinders 6 below each set of test mold grooves 2 is fixedly connected to a support ring 7 that is adapted to the annular groove 5. The support ring 7 slides and fills in the annular groove 5. The upper surface of the support ring 7 is flush with the bottom inner wall of the test mold groove 2. The support ring 7 is driven to rise or fall by the electric telescopic cylinder 6. When placing the test mold assembly 3, the electric telescopic cylinder 6 extends to raise the support ring 7 to be flush with the top of the test mold groove 2, facilitating the placement of the test mold assembly 3; after placement, it retracts, driving the support ring 7 and the test mold assembly 3 to descend to the appropriate position, so that the flange base 8 at the bottom of the test mold assembly 3 fits against the bottom inner wall of the test mold groove 2, achieving precise positioning of the test mold assembly 3. At the same time, it can also push the test mold assembly 3 out of the test mold groove 2 after inspection, making it easy to pick up.

[0040] The axis of each set of test mold groove 2 is on the same horizontal line as the axis of the corresponding internal water injection head 4, annular groove 5 and support ring 7. The outer diameter of the support ring 7 is the same as the diameter of the bottom flange base 8 of the test mold set 3.

[0041] The locking structure set in each set of test mold grooves 2 includes multiple sets of pressing arc plates 13, multiple sets of transverse movement limiting grooves 14, and multiple sets of transmission locking pins 15. Inside the body 1 of the permeability tester, in the area corresponding to the multiple sets of test mold grooves 2, a rectangular cavity 9 communicating with the test mold groove 2 is provided. The bottom end of the rectangular cavity 9 is higher than the bottom end of the test mold groove 2, and the height difference between the bottom inner wall of the rectangular cavity 9 and the bottom inner wall of the test mold groove 2 is the same as the thickness of the flange base 8. This height difference design between the bottom inner wall of the rectangular cavity 9 and the test mold groove 2 ensures that when the pressing arc plates 13 are locked, they fit precisely against the upper surface of the flange base 8, thereby achieving effective pressing of the test mold assembly 3. On the bottom inner wall, four sets of transverse movement limiting grooves 14 are provided in an annular and equidistant arrangement on the outer ring of each set of test mold grooves 2. The two sets of transverse movement limiting grooves 14 are perpendicular to each other. Each set of transverse movement limiting grooves 14 is slidably engaged with a vertical transmission pin 15 at the port away from the test mold groove 2. Each set of transmission pins 15 is fixedly connected with a pressing arc plate 13. The bottom end of the pressing arc plate 13 is slidably fitted with the bottom inner wall of the rectangular cavity 9. That is, four sets of pressing arc plates 13 are provided in an annular and equidistant arrangement on the outer ring side of each set of test mold grooves 2 in the rectangular cavity 9. The inner diameter of the annulus formed by the four sets of pressing arc plates 13 is smaller than the inner diameter of the test mold groove 2 and larger than the diameter of the flange base 8.

[0042] The locking structure also includes multiple sets of gear rings 10. The row and column spacing of the multiple sets of mold grooves 2 arranged in a matrix within the permeability tester body 1 are the same. The bottom inner wall of the rectangular cavity 9 is provided with equidistant, annularly distributed limiting arc grooves 16 corresponding to the outer ring of each set of mold grooves 2. Each set of limiting arc grooves 16 is located between two adjacent sets of transverse limiting grooves 14. The bottom end of each gear ring 10 is fixed with four sets of equidistant, annularly distributed integrated limiting arc plates 17, which are adapted to the limiting arc grooves 16. Each gear ring 10 is rotatably engaged with the four sets of limiting arc plates 17 at the bottom of each set of mold grooves 2. In the four sets of limiting arc grooves 16, the bottom and top ends of each gear ring 10 are slidably fitted with the outer wall of the top end of the pressing arc plate 13 and the inner wall of the top end of the rectangular cavity 9, respectively. Each gear ring 10 is provided with four sets of arc transmission grooves 12 that are equidistantly distributed in a ring and symmetrical about the center, corresponding to the four sets of pressing arc plates 13 below. The top ends of the transmission pins 15 on the four sets of pressing arc plates 13 are all extended upward and slidably engaged in the four sets of arc transmission grooves 12 on each gear ring 10. The top end of each set of transmission pins 15 is engaged in the end of each set of arc transmission grooves 12 near the outer ring of the gear ring 10.

[0043] In the rectangular cavity 9, multiple sets of gear rings 10 are arranged in a matrix corresponding to multiple sets of test mold grooves 2, and adjacent sets of gear rings 10 mesh with each other. The arc transmission grooves 12 and the limiting arc plates 17 on adjacent sets of gear rings 10 are distributed in a relatively symmetrical manner. A servo motor is fixedly installed inside the body 1 of the permeability tester corresponding to the lower end of the test mold groove 2. The output end of the servo motor passes through the bottom inner wall of the rectangular cavity 9 and is fixedly connected to the drive gear 11. The drive gear 11 meshes with a set of gear rings 10 located on the end side.

[0044] The lateral spacing difference between the two ends of each set of arc transmission grooves 12 on the gear ring 10 is the same as the opening length of the transverse movement limiting groove 14 and is greater than the difference between the inner diameter of the ring formed by the four sets of pressing arc plates 13 and the diameter of the flange base 8, ensuring that the retraction distance of the multiple sets of pressing arc plates 13 is sufficient to fit the pressing flange base 8.

[0045] Working principle: When conducting permeability testing on concrete specimens, after sealing and fixing the concrete specimens in the mold set 3, the mold set 3 with the specimens fixed needs to be placed into the mold groove 2. At this time, the two sets of electric telescopic cylinders 6 below the mold groove 2 can be driven to raise the annular groove 5 in the water injection head 4 until the top of the annular groove 5 is flush with the top of the mold groove 2. Then, the mold set 3 is placed on the support ring 7, and the outer ring of the support ring 7 is slightly adjusted to be aligned vertically with the outer ring of the flange base 8. Then, the electric telescopic cylinder 6 drives the support ring 7 and the test mold assembly 3 to descend as a whole until the top of the support ring 7 is flush with the top inner wall of the test mold groove 2, and the flange base 8 at the bottom of the test mold assembly 3 is attached to the bottom inner wall of the test mold groove 2. At this time, the through hole in the center of the flange base 8 at the bottom of the test mold assembly 3 is inserted into the water injection head 4. After all the test mold assemblies 3 are filled and placed in the multiple test mold grooves 2, the internal servo motor of the permeability meter body 1 can be driven to rotate the drive gear 11. At this time, the driving gear 11 can drive the gear ring 10 meshing with it to rotate. Since multiple sets of gear rings 10 are meshed with each other, they can rotate synchronously. Adjacent sets of gear rings 10 rotate relative to each other. The arc transmission grooves 12 on adjacent sets of gear rings 10 are designed to be symmetrically distributed. Therefore, after multiple sets of gear rings 10 rotate synchronously, they can use the four sets of arc transmission grooves 12 to press and transmit power to the four sets of transmission pins 15, so that the four sets of pressing arc plates 13 on the outer ring of each set of test mold grooves 2 can retract synchronously or Furthermore, since the pressing arc plate 13 fits against the bottom inner wall of the rectangular cavity 9, and the height difference between the bottom inner wall of the rectangular cavity 9 and the bottom inner wall of the mold groove 2 is the same as the thickness of the flange base 8, the four sets of pressing arc plates 13 in each set of mold groove 2 will fit against the upper surface of the pressing flange base 8 after being locked synchronously, thereby completing the pressing and locking of each set of mold assembly 3, thus ensuring the tight state of each set of mold assembly 3 in the mold groove 2, thereby ensuring the accuracy of the permeability test results of the specimen.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fully automatic concrete permeability tester, comprising a tester body (1) and multiple sets of test mold sets (3), wherein the top of the tester body (1) is provided with test mold grooves (2) arranged in a row-column matrix for filling the test mold sets (3), and a water injection head (4) is fixedly provided at the bottom center of each set of test mold grooves (2) inside the tester body (1), characterized in that: Also includes: A top material structure is provided in each set of mold grooves (2), which is used to lift or lower the mold set (3) to complete the removal or placement of the mold set (3); A locking structure is provided in each set of test mold grooves (2). The locking structure cooperates with the bottom of the test mold set (3) after it is placed, and is used to press and lock the test mold groove (2) after the test mold set (3) is placed in the test mold groove (2).

2. The fully automatic concrete permeability tester according to claim 1, characterized in that: The inner diameter of the test mold groove (2) is greater than the maximum width diameter of the test mold set (3). The test mold set (3) includes a flange base (8) located at the bottom, and a through hole that matches the water injection head (4) is opened at the center of the flange base (8) of the test mold set (3).

3. The fully automatic concrete permeability tester according to claim 2, characterized in that: The top material structure set in each set of test mold grooves (2) includes a circular groove (5), an electric telescopic cylinder (6) and a support ring (7). The permeability tester body (1) has a through circular groove (5) on the bottom inner wall corresponding to each set of test mold grooves (2). The permeability tester body (1) has two sets of vertical electric telescopic cylinders (6) fixedly installed inside each set of test mold grooves (2). The piston top of each set of electric telescopic cylinders (6) below each set of test mold grooves (2) is fixedly connected to a support ring (7) that is adapted to the circular groove (5). The support ring (7) slides and fills in the circular groove (5). The upper surface of the support ring (7) is flush with the bottom inner wall of the test mold groove (2).

4. The fully automatic concrete permeability tester according to claim 3, characterized in that: The axis of each set of test mold grooves (2) is on the same horizontal line as the axis of the corresponding internal water injection head (4), annular groove (5) and support ring (7), and the outer diameter of the support ring (7) is the same as the diameter of the bottom flange base (8) of the test mold set (3).

5. The fully automatic concrete permeability tester according to claim 2, characterized in that: The locking structure set in each set of test mold grooves (2) includes multiple sets of pressing arc plates (13), multiple sets of transverse movement limiting grooves (14) and multiple sets of transmission pins (15). The interior of the permeability tester body (1) is provided with rectangular cavities (9) that communicate with the test mold grooves (2) in the area corresponding to the multiple sets of test mold grooves (2). The bottom end of the rectangular cavity (9) is higher than the bottom end of the test mold groove (2). The height difference between the bottom inner wall of the rectangular cavity (9) and the bottom inner wall of the test mold groove (2) is the same as the thickness of the flange base (8). The bottom inner wall of the rectangular cavity (9) is provided with four sets of transverse movement pins that are equidistantly distributed in a ring on the outer ring of each set of test mold grooves (2). The limiting groove (14) is perpendicular to each other, and each set of transverse limiting grooves (14) is slidably engaged with a vertical transmission pin (15) at the port away from the test mold groove (2). Each set of transmission pins (15) is fixedly connected with a pressing arc plate (13). The bottom end of the pressing arc plate (13) is slidably attached to the bottom inner wall of the rectangular cavity (9). That is, there are four sets of pressing arc plates (13) distributed in a ring at equal intervals on the outer ring side of each set of test mold grooves (2) in the rectangular cavity (9). The inner diameter of the ring formed by the four sets of pressing arc plates (13) is smaller than the inner diameter of the test mold groove (2) and larger than the diameter of the flange base (8).

6. The fully automatic concrete permeability tester according to claim 5, characterized in that: The locking structure also includes multiple sets of gear rings (10). The row and column spacings of the multiple sets of test mold grooves (2) distributed in a matrix in the body (1) of the permeability tester are the same. The bottom inner wall of the rectangular cavity (9) is provided with a ring-shaped equidistant arc groove (16) corresponding to the outer ring of each set of test mold grooves (2). Each set of equidistant arc grooves (16) is located between two adjacent sets of transverse equidistant grooves (14). The bottom end of each set of gear rings (10) is fixed with four sets of ring-shaped equidistant integrated equidistant arc plates (17). The equidistant arc plates (17) are adapted to the equidistant arc grooves (16). Each set of gear rings (10) is rotated and locked into each set of test mold grooves (2) by the four sets of equidistant arc plates (17) at the bottom. The four sets of limiting arc grooves (16) are opened on the outer ring, and the bottom and top of each gear ring (10) slide against the outer wall of the top of the pressing arc plate (13) and the inner wall of the top of the rectangular cavity (9), respectively. Each gear ring (10) is provided with four sets of arc transmission grooves (12) that are equidistantly distributed in a ring and symmetrical about the center, corresponding to the four sets of pressing arc plates (13) below. The top of the transmission pins (15) on the four sets of pressing arc plates (13) that are distributed in a ring extends upward and slides into the four sets of arc transmission grooves (12) on each gear ring (10). The top of each set of transmission pins (15) is correspondingly engaged at the end of each set of arc transmission grooves (12) near the outer ring of the gear ring (10).

7. The fully automatic concrete permeability tester according to claim 6, characterized in that: In the rectangular cavity (9), multiple sets of gear rings (10) are arranged in a matrix corresponding to multiple sets of test mold grooves (2), and adjacent sets of gear rings (10) mesh with each other. The distribution of the arc transmission grooves (12) and the limiting arc plates (17) on the adjacent sets of gear rings (10) is relatively symmetrical. A servo motor is fixedly installed inside the body (1) of the anti-permeability instrument, corresponding to the lower end of the test mold groove (2). The output end of the servo motor passes through the bottom inner wall of the rectangular cavity (9) and is fixedly connected to the drive gear (11). The drive gear (11) meshes with a set of gear rings (10) located on the end side.

8. The fully automatic concrete permeability tester according to claim 6, characterized in that: The lateral spacing difference between the two ends of each set of arc transmission grooves (12) on the gear ring (10) is the same as the opening length of the transverse movement limiting groove (14) and is greater than the difference between the inner diameter of the ring formed by the four sets of pressing arc plates (13) and the diameter of the flange base (8).

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