Impermeability test equipment and method for reinforced concrete structure

Abstract

The invention discloses impermeability testing equipment and an impermeability testing method for a reinforced concrete structure, and relates to the technical field of impermeability testing of reinforced concrete. The device comprises a control cabinet assembly and a cabinet body which are distributed up and down, the cabinet body and the control cabinet assembly are internally provided with a pressurization assembly used for conducting permeation pressurization testing on the tested reinforced concrete test blocks, and the upper end of the control cabinet assembly is provided with a plurality of lower test mold assemblies which are distributed in an array and used for containing the test blocks; the lower test mold assembly is provided with a plurality of fixing assemblies which are annularly distributed, the lower test mold assembly is sleeved with an upper test mold, and the lower test mold assembly and the fixing assemblies are matched with each other, so that the upper test mold can be fixed without using fixing bolts; the test mold fixing device can effectively prevent parts for fixing test molds from being lost, can fix a plurality of test molds at the same time, and is convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of impermeability testing of reinforced concrete, and specifically relates to an impermeability testing device and method for reinforced concrete structures. Background Art

[0002] The function of the impermeability testing device for reinforced concrete structures is to measure the impermeability performance of concrete under a constant water pressure. By applying water with a certain pressure to a sealed concrete specimen and observing the water seepage situation of the specimen within a specified time, the impermeability grade of the concrete is determined.

[0003] During the impermeability testing process of the impermeability testing device, in order to ensure the accuracy of the test, impermeability tests are usually carried out on multiple groups of specimens. By loading the specimens into the test molds of the impermeability tester and then tightening them with bolts, it is ensured that the seal between the specimens and the test molds is good to prevent water from leaking from the side. Each test mold requires a relatively large number of fixing bolts to be tightened, and the operation process is rather cumbersome. Secondly, the test mold can only be removed after the fixing bolts are disassembled, and the fixing bolts are prone to being lost during actual use. In view of the above problems, the inventor proposes an impermeability testing device and method for reinforced concrete structures to solve the above problems. Summary of the Invention

[0004] In order to solve the above-mentioned problems; the purpose of the present invention is to provide an impermeability testing device and method for reinforced concrete structures.

[0005] To solve the above technical problems, the present invention adopts the following technical scheme: An impermeability testing device for reinforced concrete structures includes a control cabinet assembly and a cabinet body distributed up and down. A pressurizing assembly for performing penetration pressurization testing on the tested reinforced concrete test blocks is provided inside the cabinet body and the control cabinet assembly. An array of several lower test mold assemblies for placing test blocks are installed at the upper end of the control cabinet assembly. Several fixing assemblies are arranged in a circular distribution on the lower test mold assemblies, and an upper test mold is sleeved on the lower test mold assemblies.

[0006] The lower test mold assembly includes two end plates distributed up and down, and several inner threaded sleeves distributed in a circular shape and having the same number as the fixing assemblies are rotatably arranged between the two end plates.

[0007] The fixing assembly includes an external threaded sleeve threadedly arranged inside the inner circle of the inner threaded sleeve. A limiting post is fixedly installed at the top end of the external threaded sleeve. Several clamping claws are rotatably arranged at the upper end of the limiting post. A prism and a moving rod are slidably arranged up and down inside the external threaded sleeve.

[0008] Preferably, the control cabinet assembly includes a box body fixedly installed at the top end of the cabinet body. An impermeability control system and a display screen are provided on the box body for controlling the pressurizing assembly and displaying corresponding test parameters.

[0009] An internal bracket is fixedly installed inside the box, and two driving shafts are rotatably provided on the internal bracket. The two driving shafts are connected by a synchronous belt and a synchronous wheel. A servo motor for driving one driving shaft to rotate is fixedly installed on one side of the internal bracket.

[0010] Preferably, the lower test mold assembly includes an inner cylinder and an outer cylinder distributed inside and outside, and the two end plates are respectively located at the upper and lower ends of the inner cylinder and the outer cylinder, the outer cylinder is fixedly installed on the upper end of the box body, and the inner ring of the inner cylinder is fixedly installed with a test mold base, a plurality of penetration holes are opened on the test mold base, and the test mold base is installed at the liquid outlet end of the pressurizing assembly.

[0011] Preferably, a transmission shaft is rotatably provided on the two end plates, a first gear and a second bevel gear distributed up and down are installed on the transmission shaft, a plurality of first bevel gears are fixedly installed on the driving shaft, and the plurality of first bevel gears are respectively meshed with a plurality of second bevel gears.

[0012] Preferably, the inner ring of the outer cylinder is rotatably provided with an internal gear ring meshing with the first gear, and the sides of the two end plates close to each other are fixedly installed with a plurality of shaft seats distributed in a ring shape, and the two ends of the plurality of internal threaded sleeves are respectively rotatably arranged inside the corresponding shaft seats, and the outer ring of the internal threaded sleeve is fixedly installed with a second gear meshing with the internal gear ring.

[0013] Preferably, the top and bottom ends of the two end plates distributed up and down are respectively fixedly installed with a plurality of sleeves and limit seats distributed in an annular shape and the same number as the fixed components, and the circular hole on the flange plate of the upper test mold at the bottom end can be sleeved on the sleeve.

[0014] Preferably, the external threaded sleeve slides through the two end plates, and the external threaded sleeve is slidably inserted into the center of the sleeve and the limit seat;

[0015] The outer ring of the external threaded sleeve is provided with a plurality of slide grooves, and the sleeve and the inner ring of the limiting seat are fixedly provided with a plurality of sliding blocks, and the sliding blocks can slide along the corresponding slide grooves.

[0016] Preferably, a cylindrical space is opened inside the external threaded sleeve, a ring sliding inside the cylindrical space is installed at the top of the moving rod, a connecting spring is fixedly installed between the bottom end of the ring and the bottom end of the cylindrical space, and the connecting spring is slidably arranged inside the cylindrical space, the connecting spring sleeve is arranged on the outer ring of the moving rod, and a plurality of supporting springs are fixedly installed at the top of the internal bracket, the bottom end of the moving rod contacts the top end face of the supporting spring at the top end of the internal bracket through the connecting spring, and the elastic force of the supporting spring is stronger than that of the connecting spring.

[0017] Preferably, the prism is slidably inserted into the limiting post from the center of the bottom end of the limiting post. A plurality of arc-shaped blocks, which are fixedly installed at the top of the prism and are distributed in a ring shape and have the same number as the claws, are slidably arranged inside the limiting post. A rotating rod is fixedly installed at the top of the claw, and the rotating rod is rotatably arranged at the upper end of the limiting post through a torsion spring. The claw can be slidably inserted into the limiting post.

[0018] A method for using an anti-seepage test device for a reinforced concrete structure includes the following steps:

[0019] Step 1: Make a cylindrical specimen with specified dimensions from concrete mixture and steel bars, and cure it under standard curing conditions until the specified age.

[0020] Step 2: Place the cured specimen inside the upper test mold, and then place the upper test mold on the test mold base, and make the round holes on the flange of the upper test mold can be sleeved on the sleeve.

[0021] Step 3: Drive several drive shafts to rotate by using the driving shaft, the rotation of the drive shafts drives the internal gear ring to rotate, the rotation of the internal gear ring drives several internal threaded sleeves to rotate, and the rotation of the internal threaded sleeves can drive the external threaded sleeve to move linearly up and down.

[0022] Step 4: The downward movement of the external threaded sleeve drives the limiting post at its top to descend, compressing the connecting spring. As the external threaded sleeve continues to descend, the arc-shaped blocks installed at the top of the prism at the top of the moving rod slide on the limiting post accordingly, so that the arc-shaped blocks will push the claws to expand. Subsequently, the external threaded sleeve and the limiting post continue to move downward and compress the support spring. As the support spring is compressed, the claws continue to descend and contact the top of the flange of the upper test mold, thereby fixing the upper test mold, ensuring the seal between the specimen and the test mold, and preventing water from leaking from the side.

[0023] Step 5: Operate according to the specified pressure application speed and pressure level in relevant standards, so that the pressure application component gradually applies water pressure to the specimen until the specified test pressure is reached or the specimen shows water seepage, observe the water seepage situation of the specimen, and record the water seepage time and the corresponding pressure value.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. Through the mutual cooperation of the lower test mold assembly and the fixing assembly in this application, the upper test mold can be fixed without using fixing bolts, which can effectively prevent the loss of the components for fixing the test mold. Secondly, multiple test molds can be fixed simultaneously, which is convenient to use.

[0026] 2. This application drives the rotation of several transmission shafts by the rotation of the drive shaft. The rotation of the transmission shaft drives the rotation of the internal gear ring, the rotation of the internal gear ring drives the rotation of several internal threaded sleeves, and the rotation of the internal threaded sleeves can drive the external threaded sleeve to move linearly up and down. The movement of the external threaded sleeve can drive the movement of the limit post at its top, and the claws on the limit post can extend as it moves, thereby limiting the upper test die and preventing it from falling off.

[0027] 3. This application utilizes the continuous movement of the external threaded sleeve to enable the claws to continue to move after being extended, and then contact the upper test die to fix the upper test die. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 It is a schematic diagram of the overall sectional structure of the present invention.

[0031] Figure 3 It is a schematic diagram of the pressure application component and the test die base structure of the present invention.

[0032] Figure 4 It is a schematic diagram of the sectional structure of the fixing component in the contracted state of the present invention.

[0033] Figure 5 It is a schematic diagram of the sectional structure of the fixing component in the expanded state of the present invention.

[0034] Figure 6 It is a schematic diagram of the arc-shaped block and the claw structure of the present invention.

[0035] Figure 7 For the present invention Figure 2 The enlarged schematic diagram of the structure at A.

[0036] Figure 8 For the present invention Figure 2 The enlarged schematic diagram of the structure at B.

[0037] In the figure: 1. Cabinet body; 2. Control cabinet assembly; 201. Box body; 202. Internal support; 203. Driving shaft; 204. Servo motor; 205. First bevel gear; 206. Support spring; 3. Pressurizing assembly; 4. Lower test die assembly; 401. Outer cylinder; 402. Inner cylinder; 403. End plate; 404. Transmission shaft; 405. First gear; 406. Second bevel gear; 407. Internal gear ring; 408. Shaft seat; 409. Internal thread sleeve; 410. Second gear; 411. Sleeve; 412. Limit seat; 413. Test die base; 5. Fixing assembly; 501. External thread sleeve; 502. Moving rod; 503. Ring; 504. Connecting spring; 505. Prism; 506. Arc-shaped block; 507. Limit post; 508. Rotating rod; 509. Claw; 6. Upper test die. Detailed implementation mode

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] Embodiment: As Figure 1-8 shown, the present invention provides an anti-seepage test device for reinforced concrete structures, including a control cabinet assembly 2 and a cabinet body 1 distributed up and down. A pressurizing assembly 3 for performing penetration pressurization tests on the tested reinforced concrete test blocks is provided inside the cabinet body 1 and the control cabinet assembly 2. A plurality of lower test die assemblies 4 for placing test blocks are installed at the upper end of the control cabinet assembly 2 in an array. A plurality of fixing assemblies 5 distributed in a ring shape are provided on the lower test die assembly 4. An upper test die 6 is sleeved on the lower test die assembly 4;

[0040] The lower test die assembly 4 includes two end plates 403 distributed up and down. A plurality of internal thread sleeves 409 distributed in a ring shape and having the same number as the fixing assemblies 5 are rotatably provided between the two end plates 403;

[0041] The fixing assembly 5 includes an external thread sleeve 501 threadedly arranged inside the inner ring of the internal thread sleeve 409. A limit post 507 is fixedly installed at the top of the external thread sleeve 501. A plurality of claws 509 distributed in a ring shape are rotatably provided at the upper end of the limit post 507. A prism 505 and a moving rod 502 are slidably arranged inside the external thread sleeve 501 and distributed up and down.

[0042] The control cabinet assembly 2 includes a box body 201 fixedly installed at the top of the cabinet body 1. An anti-seepage control system and a display screen are provided on the box body 201 for controlling the pressurizing assembly 3 and displaying corresponding test parameters. An internal support 202 is fixedly installed inside the box body 201. Two drive shafts 203 are rotatably provided on the internal support 202, and the two drive shafts 203 are connected by a synchronous belt and synchronous pulleys. A servo motor 204 for driving one drive shaft 203 to rotate is fixedly installed on one side of the internal support 202.

[0043] By adopting the above technical solution, the two drive shafts 203 can rotate simultaneously.

[0044] The lower die assembly 4 includes an inner cylinder 402 and an outer cylinder 401 distributed inside and outside, and two end plates 403 are respectively located at the upper and lower ends of the inner cylinder 402 and the outer cylinder 401. The outer cylinder 401 is fixedly installed at the upper end of the box body 201. A test die base 413 is fixedly installed on the inner circle of the inner cylinder 402. A plurality of penetration holes are provided on the test die base 413, and the test die base 413 is installed at the liquid outlet end of the pressurizing assembly 3.

[0045] By adopting the above technical solution, the pressurizing assembly 3 can perform a water injection operation on the test die through the test die base 413.

[0046] Two drive shafts 404 are rotatably provided on the two end plates 403. A first gear 405 and a second bevel gear 406 are installed on the drive shaft 404 in a vertical distribution. A plurality of first bevel gears 205 are fixedly installed on the drive shaft 203, and the plurality of first bevel gears 205 are respectively meshed with the plurality of second bevel gears 406.

[0047] By adopting the above technical solution, the rotation of the drive shaft 203 can drive the plurality of drive shafts 404 to rotate.

[0048] An internal gear ring 407 meshing with the first gear 405 is rotatably provided on the inner circle of the outer cylinder 401. A plurality of shaft seats 408 distributed in a ring shape are fixedly installed on one side of the two end plates 403 close to each other. The two ends of a plurality of internal thread sleeves 409 are respectively rotatably arranged inside the corresponding shaft seats 408. A second gear 410 meshing with the internal gear ring 407 is fixedly installed on the outer circle of the internal thread sleeve 409.

[0049] By adopting the above technical solution, the rotation of the drive shaft 404 can drive the plurality of internal thread sleeves 409 to rotate simultaneously.

[0050] A plurality of sleeves 411 and limit seats 412 having the same number as the fixing assembly 5 are fixedly installed at the top and bottom of the two end plates 403 distributed in a ring shape respectively. The circular holes on the flange at the bottom of the upper test die 6 can be sleeved on the sleeves 411.

[0051] By adopting the above technical solution, the upper test die 6 can be sleeved on a plurality of sleeves 411 for limit positioning.

[0052] The external thread sleeve 501 slides through the two end plates 403, and the external thread sleeve 501 is slidably inserted into the centers of the sleeve 411 and the limit seat 412; a plurality of sliding grooves are formed in the outer circle of the external thread sleeve 501, and a plurality of sliding blocks are fixedly installed in the inner circles of the sleeve 411 and the limit seat 412, and the sliding blocks can slide along the corresponding sliding grooves.

[0053] By adopting the above technical solution, the external thread sleeve 501 can make a linear movement driven by the rotation of the internal thread sleeve 409.

[0054] A cylindrical space is formed inside the external thread sleeve 501. A ring 503 that slides inside the cylindrical space is installed at the top end of the moving rod 502. A connecting spring 504 is fixedly installed between the bottom end of the ring 503 and the bottom end of the cylindrical space, and the connecting spring 504 is slidably arranged inside the cylindrical space. The connecting spring 504 is sleeved on the outer circle of the moving rod 502. A plurality of support springs 206 are fixedly installed at the top end of the internal support 202. The bottom end of the moving rod 502 contacts the top end face of the support spring 206 at the top end of the internal support 202 through the connecting spring 504, and the elastic force of the support spring 206 is stronger than that of the connecting spring 504.

[0055] By adopting the above technical solution, when the external thread sleeve 501 moves, it can stretch the connecting spring 504 and compress the support spring 206.

[0056] The prism 505 is slidably inserted into the limit post 507 from the center of the bottom end of the limit post 507. A plurality of arc-shaped blocks 506 with the same number as the clamping claws 509 are fixedly installed at the top end of the prism 505 in a circular distribution, and the arc-shaped blocks 506 are slidably arranged inside the limit post 507. A rotating rod 508 is fixedly installed at the top end of the clamping claw 509, and the rotating rod 508 is rotatably arranged at the upper end of the limit post 507 through a torsion spring, and the clamping claw 509 can be slidably inserted into the limit post 507.

[0057] By adopting the above technical solution, the clamping claws 509 are extended from inside the limit post 507 to limit the upper test die 6.

[0058] A method for using an anti-seepage test device for a reinforced concrete structure includes the following steps:

[0059] Step 1: Make a cylindrical specimen with specified dimensions from the concrete mixture and steel bars, and cure it to the specified age under standard curing conditions;

[0060] Step 2: Place the cured specimen inside the upper test mold 6, then place the upper test mold 6 on the test mold base 413, and make the round holes on the flange of the upper test mold 6 sleeved on the sleeve 411;

[0061] Step 3: Rotate the driving shaft 203 to drive several transmission shafts 404 to rotate. The rotation of the transmission shafts 404 drives the internal gear ring 407 to rotate. The rotation of the internal gear ring 407 drives several internal thread sleeves 409 to rotate. The rotation of the internal thread sleeves 409 can drive the external thread sleeve 501 to perform a linear lifting and lowering motion;

[0062] Step 4: The descent of the external thread sleeve 501 drives the limit post 507 at its top to descend, compressing the connecting spring 504. As the external thread sleeve 501 continues to descend, the arc-shaped block 506 installed at the top of the prism 505 at the top of the moving rod 502 slides on the limit post 507, causing the arc-shaped block 506 to push the claw 509 to expand. Subsequently, the external thread sleeve 501 and the limit post 507 continue to move downward and compress the support spring 206. As the support spring 206 is compressed, the claw 509 continues to descend and contacts the top of the flange of the upper test mold 6, thereby fixing the upper test mold 6, ensuring the seal between the specimen and the test mold, and preventing water from leaking from the side;

[0063] Step 5: Operate according to the pressurization speed and pressure level specified in the relevant standards, so that the pressurization assembly 3 gradually applies water pressure to the specimen until the specified test pressure is reached or the specimen shows water seepage. Observe the water seepage situation of the specimen and record the water seepage time and the corresponding pressure value.

[0064] Working principle: When the present invention is in use, according to the test requirements, the concrete mixture and steel bars are made into cylindrical specimens of specified dimensions. After the specimens are formed, they are cured in standard curing conditions until the specified age;

[0065] Take the cured specimen out of the curing chamber, wipe off the moisture on the surface, apply a sealing material (such as vaseline or special sealant) on the side of the specimen, place the cured specimen inside the upper test mold 6, then place the upper test mold 6 on the test mold base 413, and make the round holes on the flange of the upper test mold 6 sleeved on the sleeve 411;

[0066] Start the servo motor 204. The servo motor 204 drives the connected driving shaft 203 to rotate. Using the transmission connection of the synchronous pulley and synchronous belt, the two driving shafts 203 can rotate simultaneously. The rotation of the driving shaft 203 drives the first bevel gear 205 thereon to rotate;

[0067] The first bevel gear 205 rotates to drive the meshed second bevel gear 406 to rotate, the second bevel gear 406 rotates to drive the transmission shaft 404 at its center to rotate, the transmission shaft 404 rotates to drive the first gear 405 on its outer ring to rotate, the first gear 405 rotates to drive the meshed inner gear ring 407 on the inner ring of the outer cylinder 401 to rotate;

[0068] The rotation of the internal gear ring 407 drives the meshed second gears 410 to rotate, and the rotation of the second gear 410 drives the internal thread sleeve 409 at the center to rotate. The slider of the inner ring of the sleeve 411 and the limit seat 412 can slide along the slide groove on the external thread sleeve 501, so that the rotation of the internal thread sleeve 409 can drive the external thread sleeve 501 to perform a linear lifting motion;

[0069] When the external threaded sleeve 501 descends, the limiting column 507 at the top thereof also descends. Since the external threaded sleeve 501 is connected to the moving rod 502 via the ring 503 and the connecting spring 504, and the moving rod 502 uses the connecting spring 504 to make its bottom end contact with the top of the internal bracket 202, when the external threaded sleeve 501 descends, the connecting spring 504 is compressed.

[0070] As the external threaded sleeve 501 continues to descend, the arc block 506 installed at the top of the prism 505 at the top of the moving rod 502 slides on the limiting column 507, and the upper surface of the arc block 506 contacts the lower surface of the claw 509, so that the arc block 506 pushes the claw 509 to deflect around the rotating rod 508 (at this time, the torsion spring of the outer ring of the claw 509 is in a compressed state);

[0071] After the claw 509 is fully extended, the external threaded sleeve 501 and the limit column 507 continue to move downward and compress the support spring 206. As the support spring 206 is compressed, the claw 509 continues to descend and contacts the top of the flange of the upper test mold 6, thereby fixing the upper test mold 6 to ensure that the test piece and the test mold are sealed to prevent water leakage from the side.

[0072] Operate according to the pressurization speed and pressure level specified in the relevant standards, so that the pressurization component 3 gradually applies water pressure to the test piece until the specified test pressure is reached or water seepage occurs in the test piece;

[0073] Observe the water seepage of the specimen and record the water seepage time and the corresponding pressure value.

[0074] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0075] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims

1. An anti-seepage test device for reinforced concrete structures, comprising a control cabinet assembly (2) and a cabinet body (1) distributed vertically, characterized in that: The cabinet body (1) and the control cabinet assembly (2) are provided with a pressurizing assembly (3) for performing a penetration pressurizing test on a reinforced concrete test block to be tested; a plurality of lower test mold assemblies (4) for placing the test blocks arranged in an array are installed on the upper end of the control cabinet assembly (2); a plurality of fixing assemblies (5) arranged in an annular shape are provided on the lower test mold assembly (4); and an upper test mold (6) is sleeved on the lower test mold assembly (4); The lower test mold assembly (4) comprises two end plates (403) distributed in an upper and lower direction, and a plurality of internal thread sleeves (409) distributed in an annular shape and having the same number as the fixed assembly (5) are rotatably arranged between the two end plates (403); The fixing assembly (5) comprises an external threaded sleeve (501) threadedly arranged on the inner ring of the internal threaded sleeve (409), a limiting column (507) being fixedly installed on the top of the external threaded sleeve (501), a plurality of claws (509) distributed in an annular shape being rotatably arranged on the upper end of the limiting column (507), and a prism (505) and a moving rod (502) distributed up and down being slidably arranged inside the external threaded sleeve (501).

2. The impermeability test device for a reinforced concrete structure according to claim 1, characterized in that, The control cabinet assembly (2) comprises a box body (201) fixedly mounted on the top of the cabinet body (1), and an anti-seepage control system and a display screen are provided on the box body (201) for controlling the pressurizing assembly (3) and displaying corresponding test parameters; An internal bracket (202) is fixedly installed inside the box body (201), two driving shafts (203) are rotatably provided on the internal bracket (202), and the two driving shafts (203) are connected by a synchronous belt and a synchronous wheel transmission, and a servo motor (204) for driving one driving shaft (203) to rotate is fixedly installed on one side of the internal bracket (202).

3. The impermeability test device for reinforced concrete structures according to claim 2, characterized in that, The lower test mold assembly (4) comprises an inner cylinder (402) and an outer cylinder (401) which are distributed inside and outside, and two end plates (403) are respectively located at the upper and lower ends of the inner cylinder (402) and the outer cylinder (401), the outer cylinder (401) is fixedly mounted on the upper end of the box body (201), and a test mold base (413) is fixedly mounted on the inner ring of the inner cylinder (402), a plurality of penetration holes are opened on the test mold base (413), and the test mold base (413) is mounted on the liquid outlet end of the pressurizing assembly (3).

4. The impermeability testing device for reinforced concrete structures according to claim 3, characterized in that, A transmission shaft (404) is rotatably provided on the two end plates (403), and a first gear (405) and a second bevel gear (406) are installed on the transmission shaft (404) and are distributed up and down. A plurality of first bevel gears (205) are fixedly installed on the drive shaft (203), and the plurality of first bevel gears (205) are respectively meshed with a plurality of second bevel gears (406).

5. The impermeability testing device for reinforced concrete structures according to claim 4, characterized in that, The inner ring of the outer cylinder (401) is rotatably provided with an inner gear ring (407) meshing with the first gear (405); a plurality of shaft seats (408) distributed in an annular shape are fixedly installed on the sides of the two end plates (403) close to each other; the two ends of a plurality of internal threaded sleeves (409) are rotatably provided inside the corresponding shaft seats (408), and the outer ring of the internal threaded sleeves (409) is fixedly provided with a second gear (410) meshing with the inner gear ring (407).

6. The impermeability test device for a reinforced concrete structure according to claim 5, characterized in that, At the top and bottom of the two end plates (403) distributed up and down, a number of sleeves (411) and limit seats (412) distributed in a ring and having the same number as the fixing components (5) are fixedly installed respectively. The round holes on the flange plate at the bottom of the upper test die (6) can be sleeved on the sleeves (411).

7. The impermeability testing device for reinforced concrete structures according to claim 6, characterized in that, The external thread sleeve (501) slides through the two end plates (403), and the external thread sleeve (501) is slidably inserted into the centers of the sleeve (411) and the limit seat (412). A number of sliding grooves are formed on the outer ring of the external thread sleeve (501), and a number of sliding blocks are fixedly installed on the inner rings of the sleeve (411) and the limit seat (412), and the sliding blocks can slide along the corresponding sliding grooves.

8. A waterproofing test device for a reinforced concrete structure according to claim 7, characterized in that, A cylindrical space is formed inside the external thread sleeve (501). At the top of the moving rod (502), a ring (503) that slides inside the cylindrical space is installed. A connecting spring (504) is fixedly installed between the bottom end of the ring (503) and the bottom end of the cylindrical space, and the connecting spring (504) is slidably arranged inside the cylindrical space. The connecting spring (504) is sleeved on the outer circle of the moving rod (502). At the top of the inner support (202), a number of support springs (206) are fixedly installed. The bottom end of the moving rod (502) contacts the top end face of the support spring (206) at the top of the inner support (202) through the connecting spring (504), and the elastic force of the support spring (206) is stronger than that of the connecting spring (504).

9. A waterproof test device for a reinforced concrete structure according to claim 8, characterized in that, The prism (505) is slidably inserted into the limit post (507) from the center of the bottom end of the limit post (507). At the top of the prism (505), a number of arc-shaped blocks (506) distributed in a ring and having the same number as the claw (509) are fixedly installed, and the arc-shaped blocks (506) are slidably arranged inside the limit post (507). At the top of the claw (509), a rotating rod (508) is fixedly installed, and the rotating rod (508) is rotatably arranged at the upper end of the limit post (507) through a torsion spring, and the claw (509) can be slidably inserted into the limit post (507).

10. The usage method of an anti-seepage testing device for reinforced concrete structures according to claim 9, characterized in that, Including the following steps: Step 1: Make a cylindrical specimen with specified dimensions from the concrete mixture and steel bars, and cure it to the specified age under standard curing conditions; Step 2: Place the cured specimen inside the upper test die (6), and then place the upper test die (6) on the test die base (413), and make the round holes on the flange plate of the upper test die (6) be sleeved on the sleeves (411); Step 3: Use the driving shaft (203) to rotate to drive a number of transmission shafts (404) to rotate. The transmission shafts (404) rotate to drive the internal gear ring (407) to rotate. The internal gear ring (407) rotates to drive a number of internal thread sleeves (409) to rotate. The rotation of the internal thread sleeves (409) can drive the external thread sleeve (501) to perform a linear lifting and lowering movement; Step 4: The outer thread sleeve (501) descends, driving the limit post (507) at its top to descend, compressing the connecting spring (504). As the outer thread sleeve (501) continues to descend, the arc-shaped block (506) installed at the top of the prism (505) at the top of the moving rod (502) slides on the limit post (507), causing the arc-shaped block (506) to push the claw (509) to extend. Subsequently, the outer thread sleeve (501) and the limit post (507) continue to move downward and compress the support spring (206). As the support spring (206) is compressed, the claw (509) continues to descend and contacts the top of the flange of the upper test die (6), thereby fixing the upper test die (6) to ensure the seal between the specimen and the test die and prevent water from leaking from the side. Step 5: Operate according to the pressurization speed and pressure level specified in the relevant standards, so that the pressurization assembly (3) gradually applies water pressure to the specimen until the specified test pressure is reached or water leakage occurs in the specimen. Observe the water leakage situation of the specimen and record the water leakage time and the corresponding pressure value.

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