A high-strength permeable concrete strength testing device

Abstract

The present invention relates to the technical field of concrete performance testing, and specifically relates to a high-strength permeable concrete strength testing device, which includes a compression testing machine. A testing table is arranged on the left side of the compression testing machine. A fixing unit for fixing concrete specimens is arranged on the upper end of the testing table, and a testing unit for testing the compressive strength and flexural strength of concrete specimens is arranged above the testing table. The fixing unit used in the present invention can accurately and stably fix the concrete specimens on the upper end of the testing table, accurately align and stably fix cubic specimens and rectangular parallelepiped specimens, ensure that the loading force acts uniformly on the surface of the specimens, avoid stress concentration caused by the displacement or inclination of the specimens, and thus ensure the authenticity and reliability of the test results. The present invention can flexibly adjust the structure of the fixing unit to adapt to the compressive strength test of cubic specimens and the flexural strength test of rectangular parallelepiped specimens, and can be used for two purposes with one machine.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete performance testing, and particularly to a device for testing the strength of high-strength permeable concrete. Background Art

[0002] High-strength permeable concrete is a special type of concrete that combines high strength and good water permeability. This type of concrete allows water to quickly pass through its structure, thereby reducing surface runoff and replenishing groundwater resources, and can effectively reduce the occurrence of urban waterlogging and flood disasters. To ensure the safety and durability of high-strength permeable concrete in practical applications, it is necessary to test its strength. The strength test mainly includes compressive strength test and flexural strength test. The compressive strength test is mainly to determine the maximum bearing capacity of high-strength permeable concrete specimens in the vertical direction, and the flexural strength test is mainly to measure the ability of high-strength permeable concrete specimens to resist bending stress.

[0003] However, the following problems exist in the process of testing the strength of high-strength permeable concrete at present: (1) Different testing devices are often used to test the compressive strength and flexural strength of concrete specimens respectively, which requires more testing time and cost, and the work efficiency is low. At the same time, neither the compressive strength test nor the flexural strength test accurately positions and stably fixes the concrete specimens. The testing positions of different batches of concrete specimens may deviate, which affects the comparability of test results. Moreover, the concrete specimens are prone to shift or tilt under the influence of the external environment during the test, which affects the uniformity of the pressure on the concrete specimens. The stability of the test process and the reliability of the test results need to be improved.

[0004] (2) During the compressive strength test, only the fixed surface of the cube specimen is pressurized, and during the flexural strength test, only the fixed position of the rectangular prism specimen under the fixed support point is pressurized. The obtained compressive test results and flexural test results are relatively single and cannot accurately reflect the stress situation of the concrete specimens in practical applications. The true accuracy of the test results needs to be improved.

[0005] Therefore, to solve the problems existing in the strength test process of high-strength permeable concrete, the present invention provides a device for testing the strength of high-strength permeable concrete. Summary of the Invention

[0006] The present invention provides a high-strength permeable concrete strength testing device, which includes a compression testing machine. A testing table is arranged on the left side of the compression testing machine. A fixing unit for fixing concrete specimens is arranged at the upper end of the testing table, and a testing unit for testing the compressive strength and flexural strength of the concrete specimens is arranged above the testing table. The fixing unit includes two C-shaped plates that are distributed left and right and slidably arranged at the upper end of the testing table. A longitudinal limiting column is rotatably installed between the front and rear transverse sections of the C-shaped plates. Between the upper ends of the two C-shaped plates on the left and right, two U-shaped plates that are distributed front and rear and slidably connected to the front and rear of the testing table are arranged. A transverse limiting column is rotatably installed between the left and right longitudinal sections of the U-shaped plate. An adjusting member for adjusting the positions of the two longitudinal limiting columns on the left and right is arranged at the upper end of the testing table. The testing unit includes a moving plate arranged above the testing table. A compressive testing component and a flexural testing component are arranged at the lower end of the moving plate. The compressive testing component includes a rectangular frame installed in the middle of the lower end of the moving plate. Uniformly arranged pressing blocks are arranged inside the rectangular frame. An installation component is arranged between the pressing block and the moving plate. The flexural testing component includes two pressing columns that are distributed left and right with respect to the rectangular frame. An adjusting component for changing the positions of the pressing columns is arranged at the upper end of the moving plate. A supporting component is arranged between the moving plate and the testing table. A locking member for locking the longitudinal limiting column and the transverse limiting column is arranged at the lower end of the moving plate.

[0007] In a possible implementation manner, the adjusting member includes adjusting plates respectively arranged at the middle parts of the lower ends of the longitudinal sections of the two C-shaped plates on the left and right. Transverse sliding grooves for slidingly connecting with the adjusting plates left and right are opened at the upper end of the testing table. Rectangular holes are uniformly arranged left and right at the upper end of the adjusting plate. Rectangular blocks that are matched with the corresponding rectangular holes are installed at the lower ends of the longitudinal sections of the C-shaped plates.

[0008] In a possible implementation manner, a control component for controlling the synchronous and opposite movement of the two C-shaped plates on the left and right and the two U-shaped plates on the front and rear is arranged at the lower end of the testing table. The control component includes a rectangular groove opened at the lower end of the testing table. Support rods are respectively installed at the middle parts of the lower ends of the transverse sections of the two U-shaped plates on the front and rear. Longitudinal sliding grooves for slidingly connecting with the support rods front and rear are opened at the upper end of the testing table. A control plate is arranged inside the rectangular groove. Control rods that are hinged to the corresponding side ends of the control plate are respectively hinged to the lower ends of the side of the adjusting plate close to the center of the testing table and the lower ends of the support rods. Avoidance grooves for avoiding the control rods are opened at the top wall of the rectangular groove. The lower end of the control plate is connected to the pushing section of an electric push rod. The electric push rod is installed in the rectangular groove through a mounting seat.

[0009] In a possible implementation manner, the installation component includes a rectangular rod installed at the upper end of the pressing block and slidably matched with the moving plate up and down. A clamping plate is installed at the upper end of the rectangular rod. Above the moving plate, there are multiple supporting plates arranged in a left-right cross pattern with each column of rectangular rods. The clamping plates in the same column are jointly located at the upper end of the corresponding supporting plate. At the lower end of the supporting plate, there are support sliders arranged evenly in the front and rear and slidably connected with the front and rear of the upper end surface of the moving plate. A cross plate is jointly installed between the front ends of the left-right arranged supporting plates. The distance between the lower end surface of the clamping plate and the upper end surface of the moving plate is equal to the thickness of the pressing block. The distance between the lower end surface of the supporting plate and the upper end surface of the moving plate is the same as the thickness of the clamping plate and is half of the thickness of the pressing block.

[0010] In a possible implementation manner, the adjusting component includes an inverted U-shaped plate. The pressing column is rotatably installed between the front and rear vertical sections of the inverted U-shaped plate. Above the horizontal section of the inverted U-shaped plate, there is an adjusting plate slidably connected with the left and right of the lower end surface of the moving plate. Between the adjusting plate and the horizontal section of the inverted U-shaped plate, there are installation columns arranged evenly in the front and rear. On the far sides of the front and rear vertical sections of the inverted U-shaped plate, there are rib plates slidably connected with the left and right of the moving plate. At the upper end of the adjusting plate, there is an adjusting block passing through the moving plate. An adjusting through groove slidably connected with the adjusting block is opened on the moving plate. On both sides of the front and rear of the adjusting through groove, there are inverted U-shaped blocks arranged evenly in the left and right and installed on the upper end of the moving plate. The adjusting block is jointly inserted and matched with the corresponding front and rear two inverted U-shaped blocks through an adjusting rod.

[0011] In a possible implementation manner, the supporting component includes connecting rods hinged at the front, rear, left, and right ends of the moving plate. At the position corresponding to the connecting rod on the upper end of the test bench, a guiding groove plate is installed. At the lower end of the connecting rod, a pin shaft slidably connected with the corresponding guiding groove plate is rotatably installed.

[0012] In a possible implementation manner, between the left and right C-shaped plates and the front and rear U-shaped plates, there is a connecting piece. The connecting piece includes cross bars installed at the closer ends of the transverse sections of the left and right C-shaped plates, and the two cross bars are distributed in a vertical staggered manner. The cross bar on the upper side is slidably connected with the left and right of the left C-shaped plate. The cross bar on the lower side is slidably connected with the left and right of the right C-shaped plate. At the front end of the longitudinal section of the rear U-shaped plate, there is an adapter plate installed. At the rear end of the longitudinal section of the front U-shaped plate, there is an insertion plate. The insertion plate is slidably matched with the opening groove opened on the corresponding adapter plate.

[0013] In a possible implementation manner, the locking piece includes uniformly arranged first jacks opened on the cross bar. Second jacks are opened inside the adapter plate, the insertion plate, and the corresponding rectangular holes. Insertion posts are installed at the positions corresponding to the cross bar and the transverse chute on the lower end of the moving plate. The first jacks and the second jacks are inserted and matched with the corresponding insertion posts. Through holes communicating with the rectangular groove are opened at the positions corresponding to the insertion posts on the upper end of the test bench.

[0014] In a possible implementation manner, four guiding columns that are slidably matched with the moving plate up and down and are distributed in a rectangular shape are installed at the upper end of the test bench. A buffer spring connected between the moving plate and the test bench is sleeved outside the guiding columns. A top plate connected to the compression testing machine is installed between the upper ends of the guiding columns. A pushing frame is installed at the upper end of the moving plate, and the upper end of the pushing frame is connected to the pushing section of a hydraulic cylinder installed on the top plate.

[0015] In a possible implementation manner, two side plates distributed left and right are installed at the upper ends of the front and rear U-shaped plates, and one end of the side plates of the front and rear ones close to each other is inclined outward.

[0016] Advantages of the present invention: 1. The fixing unit used in the present invention can accurately and stably fix the concrete specimen on the upper end of the test bench, accurately align and stably fix the cube specimen and the cuboid specimen, ensure that the loading force acts uniformly on the surface of the specimen, avoid stress concentration caused by the offset or inclination of the specimen position, and thus ensure the authenticity and reliability of the test results.

[0017] 2. The present invention can flexibly adjust the structure of the fixing unit to adapt to the compressive strength test of cube specimens and the flexural strength test of cuboid specimens. It can be used for two purposes with one machine, which can not only save production costs and working time, significantly improve work efficiency, but also keep the two tests under the same operating conditions and obtain more reliable test data.

[0018] 3. The present invention adopts an assembled pressing structure, which can not only apply uniform and complete pressure to the surface of the cube specimen, but also flexibly change the positions and quantities of the pressure applied to the cube specimen, simulate the possible stress conditions of the specimen in the real environment, so as to obtain more comprehensive and real test results. At the same time, the present invention can also adjust the positions of the support points and the pressure application points of the cuboid specimen, and conduct flexural strength tests on the cuboid specimen under different test conditions, which can further improve the accuracy of detection.

[0019] 4. The test unit and the test bench in the present invention are connected by a support assembly to form a stable quadrangular pyramid structure, which can increase the overall structural stability between the test unit and the test bench, improve the stability of the test unit during the pressing process, ensure that the concrete specimen receives a stable pressing force, and thus improve the test quality and test efficiency.

[0020] In addition to the technical problems solved by the embodiments of the present invention described above, the technical features constituting the technical solutions, and the beneficial effects brought by these technical features of the technical solutions, other technical problems that can be solved by a high-strength permeable concrete strength testing device provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0022] Figure 1 It is a front view three-dimensional structure schematic diagram of the present invention.

[0023] Figure 2 It is Figure 1 a partial front view cross-sectional view of

[0024] Figure 3 It is Figure 2 an enlarged schematic diagram of area A in

[0025] Figure 4 It is a three-dimensional structure schematic diagram of the test unit in the present invention.

[0026] Figure 5 It is a three-dimensional structure schematic diagram of the installation component in the present invention.

[0027] Figure 6 It is a three-dimensional structure schematic diagram of the adjustment component in the present invention.

[0028] Figure 7 It is a three-dimensional structure schematic diagram of the fixing unit in the present invention.

[0029] Figure 8 It is Figure 7 a partial cross-sectional view of

[0030] Figure 9 It is Figure 8 an enlarged schematic diagram of area B in

[0031] Figure 10 It is a three-dimensional structure schematic diagram of the rectangular groove, through hole and control component in the present invention.

[0032] Figure 11 It is a three-dimensional structure schematic diagram of the control component in the present invention.

[0033] In the figure: 1. Compression testing machine; 2. Test bench; 21. Guide post; 211. Guide groove plate; 22. Buffer spring; 24. Pushing frame; 25. Hydraulic cylinder; 3. Fixing unit; 31. C-shaped plate; 311. Adjusting plate; 312. Horizontal sliding groove; 313. Rectangular hole; 314. Rectangular block; 315. Side plate; 32. Longitudinal limiting post; 321. Rectangular groove; 322. Longitudinal sliding groove; 323. Control plate; 324. Control rod; 325. Electric push rod; 33. U-shaped plate; 331. Cross bar; 332. Connecting plate; 333. Insertion plate; 34. Horizontal limiting post; 341. First jack; 342. Second jack; 343. Insertion post; 344. Through hole; 4. Testing unit; 41. Moving plate; 411. Rectangular rod; 412. Clamping plate; 413. Support plate; 414. Support slider; 42. U-shaped frame; 421. Pressing post; 422. Adjusting plate; 423. Inverted U-shaped plate; 424. Rib plate; 425. Adjusting block; 427. Inverted U-shaped block; 428. Adjusting rod; 43. Pressing block; 431. Connecting rod. Detailed implementation manners

[0034] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementation manners disclosed below.

[0035] Please refer to Figure 1 , a high-strength permeable concrete strength testing device, including a compression testing machine 1, a test bench 2 is arranged on the left side of the compression testing machine 1, a fixing unit 3 for fixing concrete specimens is arranged on the upper end of the test bench 2, and a testing unit 4 for testing the compressive strength and flexural strength of concrete specimens is arranged above the test bench 2. The compression testing machine 1 is a prior art.

[0036] Please refer to Figure 1 , Figure 2 , Figure 7 , Figure 8 , Figure 9 and Figure 11, the fixing unit 3 includes two U-shaped plates 31 that are distributed left and right and slidably arranged on the upper end of the test bench 2. A longitudinal limiting column 32 is rotatably installed between the front and rear horizontal sections of the U-shaped plate 31. Between the upper ends of the two left and right U-shaped plates 31, there are two U-shaped plates 33 that are distributed front and rear and slidably connected to the front and rear of the test bench 2. A transverse limiting column 34 is rotatably installed between the left and right longitudinal sections of the U-shaped plate 33. An adjusting member for adjusting the positions of the two left and right longitudinal limiting columns 32 is arranged on the upper end of the test bench 2. The adjusting member includes adjusting plates 311 respectively arranged in the middle of the lower ends of the longitudinal sections of the two left and right U-shaped plates 31. A transverse chute 312 that is slidably connected to the adjusting plate 311 left and right is opened on the upper end of the test bench 2. Rectangular holes 313 that are evenly arranged left and right are opened on the upper end of the adjusting plate 311. A rectangular block 314 that is matched with the corresponding rectangular hole 313 is installed at the lower end of the longitudinal section of the U-shaped plate 31. Two left and right distributed side plates 315 are installed at the upper ends of the front and rear two U-shaped plates 33. One ends of the front and rear two side plates 315 that are close to each other are inclined outward.

[0037] When testing the compressive strength of high-strength permeable concrete, cube specimens (such as a 100mm×100mm×100mm cube in national standards) are usually used to measure the maximum bearing pressure in the vertical direction; when testing the flexural strength of high-strength permeable concrete, rectangular parallelepiped specimens (such as a 400mm×100mm×100mm rectangular parallelepiped in national standards) are usually used to measure its ability to resist bending stress.

[0038] When conducting the compressive strength test, first, the cube specimen can be placed in the middle of the upper end of the test bench 2 so that it is located between the two left and right longitudinal limiting columns 32 and the two front and rear transverse limiting columns 34. Subsequently, the cube specimen can be accurately positioned and fixed through the cooperation between the longitudinal limiting column 32 and the transverse limiting column 34, which can not only ensure that the cube specimen is stably located directly below the test unit 4 but also prevent the cube specimen from shifting during the compression process, thereby obtaining accurate compressive strength data; when conducting the flexural strength test, the corresponding U-shaped plate 31 and the longitudinal limiting column 32 can be moved along the adjusting plate 311 to a suitable position, and the U-shaped plate 31 and the longitudinal limiting column 32 can be fixed to the upper end of the test bench 2 through the cooperation between the rectangular block 314 and the corresponding rectangular hole 313 to ensure that the two left and right longitudinal limiting columns 32 can provide stable support for the rectangular parallelepiped specimen. Then, the rectangular parallelepiped specimen can be placed between the upper ends of the two left and right longitudinal limiting columns 32. Under the action of the two left and right longitudinal limiting columns 32, the rectangular parallelepiped specimen is in a horizontally suspended state (that is, the lower end surface of the rectangular parallelepiped specimen does not contact the upper end surface of the test bench 2) for subsequent flexural strength testing.

[0039] Please refer to Figure 1 , Figure 2 , Figure 7 , Figure 8 , Figure 9, Figure 10 and Figure 11 , a control component for controlling the synchronous and opposite movement of the left and right C-shaped plates 31 and the front and rear U-shaped plates 33 is provided at the lower end of the test bench 2. The control component includes a rectangular groove 321 opened at the lower end of the test bench 2. A support rod is installed in the middle of the lower end of the transverse section of each of the front and rear U-shaped plates 33. A longitudinal chute 322 for the front and rear sliding connection of the support rod is opened at the upper end of the test bench 2. A control board 323 is arranged inside the rectangular groove 321. A control rod 324 hinged to the corresponding side end of the control board 323 is hinged to the lower end of the side of the adjustment board 311 close to the center of the test bench 2 and the lower end of the support rod. An avoidance groove for avoiding the control rod 324 is opened on the top wall of the rectangular groove 321. The lower end of the control board 323 is connected to the pushing section of the electric push rod 325. The electric push rod 325 is installed in the rectangular groove 321 through a mounting seat.

[0040] After the cubic specimen is placed, the electric push rod 325 can pull the control board 323 downward. The control board 323 drives the control rod 324 hinged to it to move downward synchronously. The left and right control rods 324 can respectively drive the left and right adjustment boards 311 to move synchronously and oppositely along the corresponding transverse chutes 312. The C-shaped plate 31 and the longitudinal limiting column 32 move synchronously with the cooperation of the rectangular block 314 and the rectangular hole 313. The front and rear control rods 324 can respectively drive the front and rear support rods to move synchronously and oppositely along the corresponding longitudinal chutes 322. The U-shaped plate 33 and the transverse limiting column 34 move with the corresponding support plate synchronously until the cubic specimen is fixed between the front and rear transverse limiting columns 34 and the left and right longitudinal limiting columns 32.

[0041] After placing the cuboid specimen, the front and rear horizontal limit posts 34 and the left and right vertical limit posts 32 can be controlled to move synchronously and towards each other in the same manner as described above. At this time, the front and rear U-shaped plates 33 and the horizontal limit posts 34 can move synchronously and towards each other until they abut against the cuboid specimen. The left and right side plates 315 located at the upper end of the U-shaped plate 33 move synchronously and gradually approach the cuboid specimen until the side plates 315 fit against the corresponding ends of the cuboid specimen. During this process, the side plates 315 can use the inclined section to correct the position of the possibly skewed cuboid specimen, ensuring that the cuboid specimen is stably and accurately clamped between the left and right side plates 315 and the front and rear horizontal limit posts 34, thereby completing the fixation of the cuboid specimen. Since the vertical limit posts 32 and the horizontal limit posts 34 move synchronously and the distances they move are equal, the left and right vertical limit posts 32 can move synchronously and towards each other along the lower end of the cuboid specimen. The points where the vertical limit posts 32 contact the cuboid specimen after moving are exactly the actual points where the cuboid specimen is supported during subsequent tests. In addition, the cooperation position of the rectangular block 314 and the rectangular hole 313 can be flexibly changed to adjust the position of the vertical limit posts 32 on the adjustment plate 311, and then adjust the points where the left and right vertical limit posts 32 provide support for the cuboid specimen. Subsequently, the flexural strength tests of the cuboid specimens under different support points can be carried out.

[0042] Please refer to Figure 7 、 Figure 8 and Figure 11 As shown in FIGS.

[0043] When the left and right C-shaped plates 31 move towards each other, the staggered cross bars 331 can move synchronously along the horizontal sections of the corresponding C-shaped plates 31. While guiding each other, the connection degree between the left and right C-shaped plates 31 can be increased, ensuring the stability of the C-shaped plates 31 and the vertical limit posts 32 during the moving process. When the front and rear U-shaped plates 33 move towards each other, the insertion plate 333 gradually inserts into the open groove formed in the corresponding connection plate 332, thereby improving the structural stability between the front and rear U-shaped plates 33 and the horizontal limit posts 34.

[0044] Please refer to Figures 1-5, the test unit 4 includes a moving plate 41 arranged above the test bench 2. At the lower end of the moving plate 41, there are a compressive test component and a flexural test component. The compressive test component includes a U-shaped frame 42 installed in the middle of the lower end of the moving plate 41. Inside the U-shaped frame 42, there are uniformly arranged pressing blocks 43. Between the pressing blocks 43 and the moving plate 41, there is an installation component. The installation component includes a rectangular rod 411 installed at the upper end of the pressing block 43 and slidably matched with the moving plate 41 up and down. At the upper end of the rectangular rod 411, there is a clamping plate 412. Above the moving plate 41, there are multiple support plates 413 arranged in a left-right and crosswise pattern with each column of rectangular rods 411. The clamping plates 412 in the same column are jointly located at the upper end of the corresponding support plates 413. At the lower end of the support plates 413, there are uniformly arranged front and rear support sliders 414 that are slidably connected to the front and rear end faces of the upper end of the moving plate 41. Between the front ends of the left-right arranged support plates 413, there is a cross plate installed together. The distance between the lower end face of the clamping plate 412 and the upper end face of the moving plate 41 is equal to the thickness of the pressing block 43. The distance between the lower end face of the support plate 413 and the upper end face of the moving plate 41 is the same as the thickness of the clamping plate 412 and is half of the thickness of the pressing block 43.

[0045] The pressing blocks 43 in the U-shaped frame 42 are arranged in three rows and three columns, and the sum of the areas of the lower end faces of all the pressing blocks 43 is equal to the area of the upper end face of the cube specimen. In the initial state, all the pressing blocks 43 are located inside the U-shaped frame 42, and the upper end face of the pressing block 43 abuts against the lower end face of the moving plate 41. The left-right arranged support plates 413 are all located at the lower end of the corresponding clamping plates 412. The support sliders 414 and the support plates 413 as a whole provide reliable support for the clamping plate 412 to ensure the stability of the rectangular rod 411 and the pressing block 43. Subsequently, the neatly arranged pressing blocks 43 can apply a uniform and complete pressure to the entire upper end face of the cube specimen. In addition, the positions and quantities of the points where the cube specimen is pressed can be achieved by adjusting the positions of the pressing blocks 43, so as to obtain more abundant test results. Specifically, first pull the cross plate forward to synchronously move the left-right arranged support plates 413 forward to a position away from the frontmost clamping plate 412. The support sliders 414 move synchronously with the corresponding support plates 413. The un-supported clamping plate 412 can move downward with the rectangular rod 411 under the gravity of the pressing block 43. Then, the position of the pressing block 43 can be adjusted according to the needs. The clamping plate 412 corresponding to the pressing block 43 used for pressing can be manually pushed downward to fit against the upper end face of the moving plate 41. Since the distance between the clamping plate 412 and the moving plate 41 is equal to the thickness of the pressing block 43, at this time, the pressing block 43 just moves downward out of the U-shaped frame 42. The pressing blocks 43 not used for pressing are placed inside the U-shaped frame 42 by manually pulling up the corresponding clamping plates 412 and the rectangular rods 411, and then the cross plate is pushed backward to synchronously move the left-right arranged support plates 413 backward, so that the support plates 413 provide stable support for the clamping plates 412 away from the moving plate 41, and at the same time, suppress and limit the clamping plates 412 that fit against the moving plate 41 to ensure that all the pressing blocks 43 maintain a stable state.

[0046] Please refer to Figures 1-6 Figures 1-6 , the flexural test assembly includes two pressing columns 421 distributed left and right with respect to the U-shaped frame 42. The distance between the pressing column 421 and the test bench 2 is less than the distance between the pressing block 43 and the test bench 2. An adjusting assembly for changing the position of the pressing column 421 is provided at the upper end of the moving plate 41. The adjusting assembly includes an inverted U-shaped plate 423. The pressing column 421 is rotatably installed between the front and rear vertical sections of the inverted U-shaped plate 423. An adjusting plate 422 is provided above the horizontal section of the inverted U-shaped plate 423 and is slidably connected to the lower end surface of the moving plate 41 in the left and right directions. A uniformly arranged installation column is installed between the adjusting plate 422 and the horizontal section of the inverted U-shaped plate 423. Rib plates 424 slidably connected to the moving plate 41 in the left and right directions are installed on the outer sides of the front and rear vertical sections of the inverted U-shaped plate 423 away from each other. An adjusting block 425 penetrating the moving plate 41 is installed at the upper end of the adjusting plate 422. An adjusting through groove slidably connected to the adjusting block 425 is formed in the moving plate 41. Inverted U-shaped blocks 427 uniformly arranged in the left and right directions and installed at the upper end of the moving plate 41 are provided on both sides of the front and rear of the adjusting through groove. The adjusting block 425 is jointly inserted and matched with the corresponding front and rear two inverted U-shaped blocks 427 through an adjusting rod 428.

[0047] When the pressing block 43 presses the cubic specimen, even when the pressing column 421 is located at the position closest to the U-shaped frame 42, the pressing column 421 does not interfere with the test of the pressing block 43. When the pressing column 421 presses the rectangular parallelepiped specimen, the pressing column 421 contacts the rectangular parallelepiped specimen earlier than the pressing block 43, and the pressing block 43 does not affect it. In addition, the position of the pressure applied to the rectangular parallelepiped specimen can be adjusted by changing the position of the pressing column 421. Specifically, the adjusting plate 422 can be moved left and right along the lower end surface of the moving plate 41 to a suitable position. The adjusting plate 422 drives the inverted U-shaped plate 423 and the pressing column 421 to move synchronously through the installation column. The front and rear two rib plates 424 connected to the inverted U-shaped plate 423 and providing further support for it can move synchronously along the moving plate 41. The adjusting block 425 slides synchronously along the adjusting through groove with the adjusting plate 422. After the pressing column 421 moves to a suitable position, the adjusting block 425 can be fixed in the adjusting through groove through the cooperation between the adjusting rod 428 and the corresponding front and rear two inverted U-shaped blocks 427, and the adjusting plate 422, the inverted U-shaped plate 423 and the pressing column 421 are fixed synchronously; Whether it is the position where the rectangular parallelepiped specimen bears the supporting force, the position and quantity of the pressure applied to the cubic specimen, or the position of the pressure applied to the rectangular parallelepiped specimen, they can all be adjusted to obtain more comprehensive and practical test results for subsequent applications.

[0048] Please refer to Figures 1-7, four guiding columns 21 which are installed at the upper end of the test bench 2 and are in vertical sliding fit with the moving plate 41 and are distributed in a rectangular shape are provided. A buffer spring 22 connected between the moving plate 41 and the test bench 2 is sleeved outside the guiding columns 21. A top plate connected to the pressure testing machine 1 is installed between the upper ends of the guiding columns 21. A pushing frame 24 is installed at the upper end of the moving plate 41, and the upper end of the pushing frame 24 is connected to the pushing section of a hydraulic cylinder 25 installed on the top plate. The pressure testing machine 1 can accurately control the action of the hydraulic cylinder 25 through an existing integrated control system to precisely control the pressure received by the concrete specimen, and the pressure testing machine 1 can monitor the force applied by the hydraulic cylinder 25 in real time.

[0049] Whether it is to test the compressive strength of a cube specimen or the flexural strength of a cuboid specimen, the corresponding specimen can be pressured in the same way by using the pressing block 43 and the pressing column 421. Specifically, the hydraulic cylinder 25 can push the moving plate 41 along the four guiding columns 21 to compress the buffer spring 22 and move downward through the pushing frame 24. The pressing block 43 and the pressing column 421 move downward synchronously with the moving plate 41. The guiding columns 21 can support and guide the downward movement of the moving plate 41, and the buffer spring 22 can buffer the downward movement of the moving plate 41 to ensure that the pressing block 43 and the pressing column 421 can apply a stable and uniform pressure on the corresponding specimen. For the cube specimen, the pressing block 43 continuously applies a vertically downward pressure on the cube specimen until the cube specimen is damaged. For the cuboid specimen, the pressing block 43 continuously applies a vertically downward pressure on the cuboid specimen until the cuboid specimen breaks. During this process, the pressure testing machine 1 can record the compressive test data of the cube specimen and the flexural test data of the cuboid specimen, and subsequently evaluate the compressive capacity of the cube specimen and the flexural capacity of the cuboid specimen.

[0050] Please refer to Figure 1 , Figure 2 , Figure 4 , Figure 7 , Figure 8 , Figure 10 and Figure 11, a support assembly is provided between the moving plate 41 and the test bench 2. The support assembly includes connecting rods 431 hinged at the front, rear, left, and right ends of the moving plate 41. Guide groove plates 211 are installed at the positions corresponding to the connecting rods 431 on the upper end of the test bench 2. A pin shaft that is rotatably installed at the lower end of the connecting rod 431 and slidably connected to the corresponding guide groove plate 211 is provided. A locking member for locking the longitudinal limiting post 32 and the transverse limiting post 34 is provided at the lower end of the moving plate 41. The locking member includes uniformly arranged first jacks 341 opened on the cross bar 331. Second jacks 342 are opened inside the connecting plate 332, the inserting plate 333, and the corresponding rectangular holes 313. Inserting posts 343 are installed at the positions corresponding to the cross bar 331 and the transverse sliding grooves 312 at the lower end of the moving plate 41. The first jacks 341 and the second jacks 342 are in plug-in fit with the corresponding inserting posts 343. Through holes 344 communicating with the rectangular grooves 321 are opened at the positions corresponding to the inserting posts 343 on the upper end of the test bench 2.

[0051] During the downward movement of the moving plate 41, the connecting rods 431 hinged to it rotate synchronously and slide outwards along the corresponding guide groove plates 211 through the pin shafts. The stable quadrangular pyramid structure formed among the moving plate 41, the connecting rods 431, and the test bench 2 can ensure the smooth downward movement of the moving plate 41 and increase the stability during the pressing process. In addition, when the moving plate 41 moves downward, it also drives the inserting posts 343 to move downward. The two left and right inserting posts 343 can sequentially pass through the second jacks 342 on the connecting plate 332, the inserting plate 333, and the rectangular holes 313 from top to bottom, and finally insert into the corresponding through holes 344 on the test bench 2, realizing the tight locking between the front and rear U-shaped plates 33, the adjusting plates 311, and the test bench 2. The second jacks 342 on the connecting plate 332, the inserting plate 333, and the rectangular holes 313 can always be on the same vertical line. The two front and rear inserting posts 343 can sequentially pass through the first jacks 341 on the two cross bars 331 distributed in a staggered manner from top to bottom, and finally insert into the corresponding through holes 344 on the test bench 2, completing the locking between the two left and right C-shaped plates 31 and the test bench 2. When the positions of the two left and right C-shaped plates 31 change, the uniformly arranged first jacks 341 opened on the cross bar 331 can still satisfy the fit with the inserting posts 343. Through the precise fit among the inserting posts 343, the first jacks 341, the second jacks 342, and the through holes 344, the connection structure stability of the overall longitudinal limiting post 32 and the transverse limiting post 34 can be ensured, further increasing the stability during the pressing process and ensuring the accuracy and reliability of the test data.

[0052] In an embodiment of the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0053] In the description of the present invention, it should also be noted that, unless otherwise clearly specified or limited, the terms "arranged", "connected", "installed" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, an integral connection or a sliding connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A high-strength permeable concrete strength testing device, comprising a pressure testing machine, a test bench is provided on the left side of the pressure testing machine, and is characterized in that: A fixing unit for fixing a concrete specimen is provided at the upper end of the test bench, and a testing unit for testing the compressive strength and flexural strength of the concrete specimen is provided above the test bench; The fixing unit includes two U-shaped plates that are distributed left and right and slidably arranged at the upper end of the test bench. A longitudinal limiting column is rotatably installed between the front and rear transverse sections of the U-shaped plate. Between the upper ends of the two U-shaped plates on the left and right, two U-shaped plates that are distributed front and rear and slidably connected to the front and rear of the test bench are provided. A transverse limiting column is rotatably installed between the left and right longitudinal sections of the U-shaped plate. An adjusting member for adjusting the positions of the two longitudinal limiting columns on the left and right is provided at the upper end of the test bench; A control assembly for controlling the synchronous and opposite movement of the two U-shaped plates on the left and right and the two U-shaped plates on the front and rear respectively is provided at the lower end of the test bench; Two side plates that are distributed left and right are installed at the upper ends of the two U-shaped plates on the front and rear. One end of the two side plates that are close to each other is inclined outward; The testing unit includes a moving plate provided above the test bench. A compressive testing assembly and a flexural testing assembly are provided at the lower end of the moving plate. The compressive testing assembly includes a U-shaped frame installed in the middle of the lower end of the moving plate. Uniformly arranged pressing blocks are provided inside the U-shaped frame. An installation assembly is provided between the pressing block and the moving plate. The flexural testing assembly includes two pressing columns that are distributed left and right with respect to the U-shaped frame. An adjusting assembly for changing the position of the pressing column is provided at the upper end of the moving plate; A support assembly is provided between the moving plate and the test bench. The testing unit and the test bench are connected through the support assembly to form a stable quadrangular pyramid structure. A locking member for locking the longitudinal limiting column and the transverse limiting column is provided at the lower end of the moving plate.

2. A high-strength permeable concrete strength testing device according to claim 1, characterized in that: The adjusting member includes adjusting plates respectively provided in the middle of the lower ends of the longitudinal sections of the two U-shaped plates on the left and right. Transverse chutes that are slidably connected to the adjusting plates left and right are opened at the upper end of the test bench. Rectangular holes that are uniformly arranged left and right are opened at the upper ends of the adjusting plates. Rectangular blocks that are matched with the corresponding rectangular holes are installed at the lower ends of the longitudinal sections of the U-shaped plate.

3. A high-strength permeable concrete strength testing device according to claim 1, characterized in that: The control assembly includes a rectangular groove opened at the lower end of the test bench. Support rods are respectively installed in the middle of the lower ends of the transverse sections of the two U-shaped plates on the front and rear. Longitudinal chutes that are slidably connected to the support rods front and rear are opened at the upper end of the test bench. A control plate is provided inside the rectangular groove. Control rods that are hinged to the corresponding side ends of the control plate are respectively hinged at the lower ends of the adjusting plate close to the center of the test bench and the lower ends of the support rods. Avoidance grooves for avoiding the control rods are opened at the top wall of the rectangular groove. The lower end of the control plate is connected to the pushing section of the electric push rod. The electric push rod is installed in the rectangular groove through a mounting seat.

4. A high-strength permeable concrete strength testing device according to claim 1, characterized in that: The installation assembly includes a rectangular rod installed at the upper end of the pressing block and slidably matched with the moving plate up and down. A clamping plate is installed at the upper end of the rectangular rod. A plurality of support plates that are arranged crosswise left and right with each column of rectangular rods are provided above the moving plate. The clamping plates in the same column are jointly located above the corresponding support plates. Support sliders that are uniformly arranged front and rear and slidably connected to the front and rear of the upper end surface of the moving plate are installed at the lower ends of the support plates. A cross plate is jointly installed between the front ends of the support plates arranged left and right. The distance between the lower end surface of the clamping plate and the upper end surface of the moving plate is equal to the thickness of the pressing block. The distance between the lower end surface of the support plate and the upper end surface of the moving plate is the same as the thickness of the clamping plate and is half of the thickness of the pressing block.

5. A high-strength permeable concrete strength testing device according to claim 1, characterized in that: The adjusting assembly includes an inverted U-shaped plate. The pressing column is rotatably installed between the front and rear vertical sections of the inverted U-shaped plate. An adjusting plate that is slidably connected to the lower end surface of the moving plate left and right is arranged above the horizontal section of the inverted U-shaped plate. A plurality of mounting columns arranged evenly front and rear are installed between the adjusting plate and the horizontal section of the inverted U-shaped plate. Rib plates that are slidably connected to the moving plate left and right are installed on the sides of the front and rear vertical sections of the inverted U-shaped plate that are far away from each other. An adjusting block that penetrates the moving plate is installed at the upper end of the adjusting plate. An adjusting through groove that is slidably connected to the adjusting block is formed in the moving plate. Both the front and rear sides of the adjusting through groove are provided with inverted U-shaped blocks that are arranged evenly left and right and installed at the upper end of the moving plate. The adjusting block is jointly inserted and matched with the corresponding front and rear two inverted U-shaped blocks through an adjusting rod.

6. A high-strength permeable concrete strength testing device according to claim 1, characterized in that: The supporting assembly includes connecting rods that are hinged to the front, rear, left, and right ends of the moving plate. Guide groove plates are installed at the positions corresponding to the connecting rods on the upper end of the test bench. The lower ends of the connecting rods are rotatably installed with pins that are slidably connected to the corresponding guide groove plates.

7. A high-strength permeable concrete strength testing device according to claim 1, characterized in that: Connectors are arranged between the left and right two C-shaped plates and the front and rear two U-shaped plates. The connectors include cross bars that are installed at the ends of the lateral sections of the left and right two C-shaped plates that are close to each other, and the two cross bars are arranged vertically and staggeredly. The cross bar located on the upper side is slidably connected to the left C-shaped plate left and right. The cross bar located on the lower side is slidably connected to the right C-shaped plate left and right. A connecting plate is installed at the front end of the longitudinal section of the U-shaped plate located at the rear. An insertion plate is installed at the rear end of the longitudinal section of the U-shaped plate located at the front. The insertion plate is slidably matched with the opening groove formed in the corresponding connecting plate.

8. A high-strength permeable concrete strength testing device according to claim 7, characterized in that: The locking member includes a plurality of insertion holes one that are arranged evenly left and right and formed in the cross bar. Insertion holes two are formed in the connecting plate, the insertion plate, and the corresponding rectangular holes. Insertion columns are installed at the positions corresponding to the cross bar and the horizontal sliding groove at the lower end of the moving plate. The insertion holes one and the insertion holes two are inserted and matched with the corresponding insertion columns. Through holes that communicate with the rectangular groove are formed at the positions corresponding to the insertion columns on the upper end of the test bench.

9. A high-strength permeable concrete strength testing device according to claim 1, characterized in that: Four guide columns that are slidably matched with the moving plate up and down and are arranged in a rectangular shape are installed on the upper end of the test bench. Buffer springs that are connected between the moving plate and the test bench are sleeved outside the guide columns. A top plate that is connected to the pressure testing machine is installed between the upper ends of the guide columns. A pushing frame is installed at the upper end of the moving plate. The upper end of the pushing frame is connected to the pushing section of the hydraulic cylinder installed on the top plate.

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