Device for testing strength of high-strength pervious concrete

Abstract

The invention relates to the technical field of concrete performance testing, in particular to a high-strength pervious concrete strength testing device which comprises a pressure testing machine, a testing table is arranged on the left side of the pressure testing machine, and a fixing unit used for fixing a concrete test piece is arranged at the upper end of the testing table. A testing unit for testing the compressive strength and the breaking strength of the concrete test piece is arranged above the testing table. The fixing unit used by the invention can accurately and stably fix the concrete test piece at the upper end of the test table, accurately align and stably fix the cubic test piece and the cuboid test piece, ensure that the loading force uniformly acts on the surface of the test piece, and avoid stress concentration caused by position deviation or inclination of the test piece; therefore, the authenticity and reliability of the test result are ensured. According to the invention, the structure of the fixing unit can be flexibly adjusted to adapt to the compressive strength test of the cube test piece and the breaking strength test of the cuboid test piece, so that one machine has two purposes.

Description

Technical Field

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

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

[0003] However, the following problems exist in the strength test of high-strength permeable concrete: (1) Different test equipment is often used to test the compressive strength and flexural strength of concrete specimens respectively, which requires a lot of testing time and cost, and has low work efficiency. At the same time, whether it is the compressive strength or the flexural strength test, the concrete specimens are not accurately positioned and stably fixed. The test positions of different batches of concrete specimens may deviate, affecting the comparability of the test results. In addition, the concrete specimens are easily affected by the external environment during the test and may shift or tilt, affecting 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, pressure was applied only to the fixed surface of the cubic specimen, and during the flexural strength test, pressure was applied only to the fixed points of the rectangular specimen under the fixed support points. The obtained compressive test results and flexural test results are relatively simple and cannot accurately reflect the stress conditions of the concrete specimens in actual applications. The true accuracy of the test results needs to be improved.

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

[0006] The present invention provides a high-strength permeable concrete strength testing device, including a compression testing machine. A testing table is arranged on the left side of the compression testing machine. A fixing unit for fixing a concrete specimen 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 specimen 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 plate. 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 slidably connecting with the adjusting plates are formed 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 matched with the corresponding rectangular holes are installed at the lower ends of the longitudinal sections of the C-shaped plate.

[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 respectively is arranged at the lower end of the testing table. The control component includes a rectangular groove formed 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 slidably connecting with the support rods are formed at the upper end of the testing table. A control plate is arranged inside the rectangular groove. Control rods respectively hinged to the corresponding side ends of the control plate are hinged to the lower sides of the adjusting plates close to the center of the testing table and the lower ends of the support rods. Avoidance grooves for avoiding the control rods are formed 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 sliding up and down with the moving plate. 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 back and slidingly connected to the front and back 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 sliding left and right with 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 back. On the far sides of the front and rear vertical sections of the inverted U-shaped plate, there are rib plates sliding left and right with 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 for the adjusting block to slide left and right is opened on the moving plate. On both sides of the front and back 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 rods on the upper end of the test bench, there is a guide groove plate installed. At the lower end of the connecting rod, there is a pin shaft rotatably installed and slidingly connected to the corresponding guide groove plate.

[0012] In a possible implementation manner, between the left and right two C-shaped plates and the front and rear two 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 two C-shaped plates, and the two cross bars are distributed in a vertical staggered manner. The upper cross bar is slidingly connected to the left C-shaped plate in the left and right direction, and the lower cross bar is slidingly connected to the right C-shaped plate in the left and right direction. 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 slidingly matched with the opening groove opened on the corresponding adapter plate.

[0013] In a possible implementation manner, the locking part includes uniformly arranged left and right jacks one opened on the cross bar. Jacks two are opened inside the adapter plate, the insertion plate, and the corresponding rectangular holes. At the positions corresponding to the cross bar and the transverse chute on the lower end of the moving plate, there are insertion posts installed. The jacks one and the jacks two are inserted and matched with the corresponding insertion posts. At the position corresponding to the insertion posts on the upper end of the test bench, there are through holes communicating with the rectangular groove opened.

[0014] In one possible implementation, four guide columns are installed on the upper end of the test bench and are distributed in a rectangular shape and are slidably matched with the movable plate. The outer sleeve of the guide columns is provided with a buffer spring connected between the movable plate and the test bench. A top plate connected to the pressure testing machine is installed between the upper ends of the guide columns. A pushing frame is installed on the upper end of the movable plate, and the upper end of the pushing frame is connected to the pushing section of the hydraulic cylinder installed on the top plate.

[0015] In a possible implementation, two side panels distributed left and right are installed on the upper ends of the two front and rear U-shaped plates, and the ends of the two front and rear side panels that are close to each other are inclined outwards.

[0016] Beneficial effects 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 cubic specimen and the rectangular specimen, ensure that the loading force acts evenly on the surface of the specimen, avoid stress concentration caused by specimen position offset or tilt, thereby ensuring 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 the cubic specimen and the flexural strength test of the rectangular specimen. One machine can be used for two purposes, which can not only save production costs and working time and significantly improve work efficiency, but also make the two tests maintain consistent operating conditions to obtain more reliable test data.

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

[0019] 4. The test unit and the test bench in the present invention are connected by a supporting assembly to form a stable quadrangular platform 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 pressure application process, ensure that the concrete specimen is subjected to a stable pressure application, 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 that constitute the technical scheme, and the beneficial effects brought about by the technical features of these technical schemes, 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 scheme, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the main stereoscopic structure of the present invention.

[0023] Figure 2 for Figure 1 A partial front sectional view of .

[0024] Figure 3 for Figure 2 A magnified schematic diagram of area A in the middle.

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

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

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

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

[0029] Figure 8 for Figure 7 A partial cross-sectional view of .

[0030] Fig. 9 for Figure 8 A magnified schematic diagram of area B.

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

[0032] Fig.11 It is a schematic diagram of the three-dimensional structure 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. Supporting plate; 414. Supporting 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] 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 is provided in conjunction with the accompanying drawings. Many specific details are set forth in the following description 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 , Fig. 9 and Fig.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 sliding groove 312 that is slidably connected to the adjusting plate 311 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 detecting the compressive strength of high-strength permeable concrete, cube specimens (such as cubes of 100mm×100mm×100mm in national standards) are usually used to measure the maximum bearing pressure in the vertical direction; when detecting the flexural strength of high-strength permeable concrete, rectangular parallelepiped specimens (such as rectangular parallelepipeds of 400mm×100mm×100mm 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 and located between the two left and right longitudinal limiting columns 32 and the two front and rear transverse limiting columns 34. Subsequently, precise positioning and fixing of the cube specimen can be achieved 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 , Fig. 9, Fig.10 and Fig.11 , a control component for controlling the left and right U-shaped plates 31 and the front and rear U-shaped plates 33 to move synchronously and towards each other 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 at 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 plate 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 drive the left and right adjustment plates 311 to move synchronously and towards each other along the corresponding transverse chutes 312. The U-shaped plate 31 and the longitudinal limit post 32 move synchronously through the cooperation of the rectangular block 314 and the rectangular hole 313. The front and rear control rods 324 can drive the front and rear support rods to move synchronously and towards each other along the corresponding longitudinal chutes 322. The U-shaped plate 33 and the transverse limit post 34 move with the corresponding support plates synchronously until the cubic specimen is fixed between the front and rear transverse limit posts 34 and the left and right longitudinal limit posts 32.

[0041] After placing the cuboid specimen, the front and rear lateral limit posts 34 and the left and right longitudinal limit posts 32 can be controlled to move synchronously towards each other in the same manner as described above. At this time, the front and rear U-shaped plates 33 and the lateral limit posts 34 can move synchronously towards each other until they abut against the cuboid specimen. The left and right side plates 315 at the upper end of the U-shaped plate 33 move synchronously and gradually approach the cuboid specimen until the side plates 315 are attached to 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 lateral limit posts 34, thereby completing the fixation of the cuboid specimen. Since the longitudinal limit posts 32 and the lateral limit posts 34 move synchronously and the distances they move are equal, the left and right longitudinal limit posts 32 can move synchronously towards each other along the lower end of the cuboid specimen. The points where the longitudinal limit posts 32 contact the cuboid specimen after moving are exactly the real points where the cuboid specimen is supported during subsequent tests. In addition, the matching position of the rectangular block 314 and the rectangular hole 313 can be flexibly changed to adjust the position of the longitudinal limit posts 32 on the adjustment plate 311, and then adjust the points where the left and right longitudinal 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 Fig.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 transverse 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 smoothness of the C-shaped plates 31 and the longitudinal 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 opening groove formed in the corresponding connection plate 332, thereby improving the structural stability between the front and rear U-shaped plates 33 and the lateral limit posts 34.

[0044] Please refer to Figure 1-Figure 5The test unit 4 includes a moving plate 41 arranged above the test bench 2, a compression test assembly and a flexure test assembly are arranged at the lower end of the moving plate 41, the compression test assembly includes a circular frame 42 installed in the middle of the lower end of the moving plate 41, and evenly arranged pressure blocks 43 are arranged inside the circular frame 42. A mounting assembly is arranged between the pressure blocks 43 and the moving plate 41, and the mounting assembly includes a rectangular rod 411 installed at the upper end of the pressure block 43 and slidingly matched with the moving plate 41 up and down, a card plate 412 is installed at the upper end of the rectangular rod 411, and a plurality of card plates 412 are arranged above the moving plate 41. The columns of rectangular rods 411 are cross-arranged on the left and right sides of the support plates 413, and the card plates 412 in the same column are located together at the upper ends of the corresponding support plates 413. The lower ends of the support plates 413 are equipped with support sliders 414 that are evenly arranged front to back and are slidably connected to the upper end faces of the movable plates 41 front to back. A cross plate is commonly installed between the front ends of the left and right arranged support plates 413. The distance between the lower end faces of the card plates 412 and the upper end faces of the movable plates 41 is equal to the thickness of the pressure block 43. The distance between the lower end faces of the support plates 413 and the upper end faces of the movable plates 41 is the same as the thickness of the card plates 412 and is half the thickness of the pressure block 43.

[0045] The pressure blocks 43 in the circular frame 42 are arranged in three rows and three columns, and the sum of the areas of the lower end faces of all the pressure blocks 43 is equal to the area of ​​the upper end face of the cubic specimen. In the initial state, all the pressure blocks 43 are located in the circular frame 42, and the upper end faces of the pressure blocks 43 are pressed against the lower end face of the movable plate 41. The left and right supporting plates 413 are located at the lower ends of the corresponding card plates 412. The supporting sliders 414 and the supporting plates 413 as a whole provide reliable support for the card plates 412 to ensure the stability of the rectangular rods 411 and the pressure blocks 43. The pressure blocks 43 arranged neatly subsequently can apply uniform and complete pressure to the upper end face of the cubic specimen as a whole. In addition, the points and number of pressure applied to the cubic specimen can be achieved by adjusting the positions of the pressure blocks 43, so as to obtain richer test results. Specifically, the cross plate can be pulled forward first to make the left and right supporting plates 413 synchronously move forward to the card plate 412 away from the frontmost side, and the supporting sliders 414 can move with the corresponding The corresponding support plate 413 moves synchronously, and the disengaged card plate 412 can move downward with the rectangular rod 411 under the action of the gravity of the pressure block 43, and then the position of the pressure block 43 can be adjusted according to the demand, and the corresponding card plate 412 held by the pressure block 43 for applying pressure can be manually pushed down to fit the upper end surface of the movable plate 41. Since the distance between the card plate 412 and the movable plate 41 is equal to the thickness of the pressure block 43, the pressure block 43 at this time just separates from the circular frame 42 downward, and the pressure block 43 not used for applying pressure is placed in the circular frame 42 by manually pulling up the corresponding card plate 412 and the rectangular rod 411, and then pushing the cross plate backward to make the left and right arranged support plates 413 move backward synchronously, so that the support plate 413 provides stable support for the card plate 412 away from the movable plate 41, and at the same time, the card plate 412 fitted with the movable plate 41 is pressed and limited to ensure that all pressure blocks 43 remain in a stable state.

[0046] See also Figure 1-Figure 6 The anti-bending test assembly includes two pressure columns 421 distributed left and right about the circular frame 42, the distance between the pressure column 421 and the test bench 2 is smaller than the distance between the pressure block 43 and the test bench 2, and an adjustment assembly for changing the position of the pressure column 421 is provided at the upper end of the movable plate 41, and the adjustment assembly includes an inverted U-shaped plate 423, and the pressure column 421 is rotatably installed between the front and rear vertical sections of the inverted U-shaped plate 423, and an adjustment plate 422 connected to the lower end surface of the movable plate 41 for sliding left and right is provided above the horizontal section of the inverted U-shaped plate 423, and the adjustment plate 422 and the inverted U-shaped plate 423 are connected to each other. Mounting columns that are evenly arranged front and back are installed between the horizontal sections, and ribs 424 that are slidably connected to the movable plate 41 are installed on the sides of the front and rear vertical sections of the inverted U-shaped plate 423 that are away from each other. An adjusting block 425 that passes through the movable plate 41 is installed on the upper end of the adjusting plate 422, and an adjusting through groove that is slidably connected to the adjusting block 425 is opened on the movable plate 41. Inverted U-shaped blocks 427 that are evenly arranged left and right and installed on the upper end of the movable plate 41 are provided on the front and rear sides of the adjusting through groove, and the adjusting block 425 is plugged into and matched with the corresponding front and rear two inverted U-shaped blocks 427 through an adjusting rod 428.

[0047] When the pressure block 43 applies pressure to the cubic specimen, even if the pressure column 421 is located at the position closest to the circular frame 42, the pressure column 421 does not interfere with the test of the pressure block 43. When the pressure column 421 applies pressure to the rectangular specimen, the pressure column 421 contacts the rectangular specimen earlier than the pressure block 43, and the pressure block 43 does not affect it. In addition, the point where the rectangular specimen is pressed can be adjusted by changing the position of the pressure column 421. Specifically, the adjustment plate 422 can be moved left and right along the lower end surface of the movable plate 41 to a suitable position. The adjustment plate 422 drives the inverted U-shaped plate 423 to move synchronously with the pressure column 421 through the mounting column. The front and rear ribs 424 connected to the inverted U-shaped plate 423 and providing further support for it can move synchronously along the movable plate 41. The adjustment block 425 slides synchronously along the adjustment slot with the adjustment plate 422, and waits for pressure to be applied. After the column 421 is moved to a suitable position, the adjustment block 425 can be fixed in the adjustment groove by the cooperation between the adjustment rod 428 and the corresponding front and rear two inverted U-shaped blocks 427, and the adjustment plate 422, the inverted U-shaped plate 423 and the pressure column 421 are fixed synchronously; whether it is the position where the rectangular specimen bears the supporting force, the points and amount of pressure applied to the cubic specimen, or the points of pressure applied to the rectangular specimen, all can be adjusted so as to obtain more comprehensive test results that are closer to the actual application environment in the future.

[0048] See also Figure 1-Figure 7The upper end of the test bench 2 is provided with four guide columns 21 which are slidably matched with the moving plate 41 and are distributed in a rectangular shape. The outer part of the guide columns 21 is provided with a buffer spring 22 which is connected between the moving plate 41 and the test bench 2. A top plate connected to the pressure testing machine 1 is installed between the upper ends of the guide columns 21. A pushing frame 24 is installed on the upper end of the moving plate 41. The upper end of the pushing frame 24 is connected to the pushing section of the hydraulic cylinder 25 installed on the top plate. The pressure testing machine 1 can accurately control the action of the hydraulic cylinder 25 through the existing integrated control system to accurately control the pressure on the concrete specimen, and the pressure testing machine 1 can monitor the force applied by the hydraulic cylinder 25 in real time.

[0049] No matter whether the compressive strength test is performed on a cubic specimen or the flexural strength test is performed on a rectangular specimen, the pressure block 43 and the pressure column 421 can be used to apply pressure to the corresponding specimen in the same manner. Specifically, the hydraulic cylinder 25 can push the movable plate 41 downward along the four guide columns 21 through the push frame 24 to compress the buffer spring 22 and move. The pressure block 43 and the pressure column 421 move downward synchronously with the movable plate 41. The guide column 21 can support and guide the downward movement of the movable plate 41. The buffer spring 22 can buffer the downward movement of the movable plate 41 to ensure that the pressure Block 43 and pressure column 421 can apply steady and uniform pressure to the corresponding specimen. For a cubic specimen, the pressure block 43 continuously applies vertical downward pressure to the cubic specimen until the cubic specimen is destroyed. For a rectangular specimen, the pressure block 43 continuously applies vertical downward pressure to the rectangular specimen until the rectangular specimen breaks. During this process, the pressure testing machine 1 can record the compression test data of the cubic specimen and the flexural test data of the rectangular specimen, and subsequently evaluate the compression resistance of the cubic specimen and the flexural resistance of the rectangular specimen.

[0050] See also Figure 1 , Figure 2 , Figure 4 , Figure 7 , Figure 8 , Fig.10 and Fig.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 insertion holes 341 opened on the cross bar 331. Second insertion holes 342 are opened inside the connecting plate 332, the insertion plate 333, and the corresponding rectangular hole 313. Insertion posts 343 are installed at the positions corresponding to the cross bar 331 and the transverse sliding groove 312 at the lower end of the moving plate 41. The first insertion holes 341 and the second insertion holes 342 are in plug-in fit with the corresponding insertion posts 343. Through holes 344 communicating with the rectangular groove 321 are opened at the positions corresponding to the insertion posts 343 on the upper end of the test bench 2.

[0051] During the downward movement of the moving plate 41, the connecting rod 431 hinged to it rotates synchronously and slides outward along the corresponding guide groove plate 211 through the pin shaft. The stable quadrangular pyramid structure formed among the moving plate 41, the connecting rod 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 insertion posts 343 to move downward. The two left and right insertion posts 343 can sequentially pass through the second insertion holes 342 on the connecting plate 332, the insertion plate 333, and the rectangular hole 313 from top to bottom, and finally be inserted 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 adjustment plate 311, and the test bench 2. The second insertion holes 342 on the connecting plate 332, the insertion plate 333, and the rectangular hole 313 can always be on the same vertical line. The two front and rear insertion posts 343 can sequentially pass through the first insertion holes 341 on the two cross bars 331 distributed in a staggered manner from top to bottom, and finally be inserted 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 insertion holes 341 opened on the cross bar 331 can still satisfy the fit with the insertion posts 343. Through the precise fit among the insertion posts 343, the first insertion holes 341, the second insertion holes 342, and the through holes 344, the connection structure stability of the longitudinal limiting post 32 and the transverse limiting post 34 as a whole can be ensured, further increasing the stability during the pressing process and ensuring the accuracy and reliability of the test data.

[0052] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0053] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, or a sliding connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-strength permeable concrete strength testing device, comprising a pressure testing machine (1), a test bench (2) being arranged on the left side of the pressure testing machine (1), characterized in that: A fixing unit (3) for fixing a concrete specimen is provided at the upper end of the test bench (2), and a testing unit (4) for testing the compressive strength and flexural strength of the concrete specimen is provided above the test bench (2); The fixing unit (3) includes two U-shaped plates (31) arranged left and right and slidably disposed at the upper end of the test bench (2). A longitudinal limiting column (32) is rotatably installed between the front and rear transverse sections of the U-shaped plate (31). Between the upper ends of the two U-shaped plates (31) on the left and right, two L-shaped plates (33) are provided, which are distributed front and rear and are slidably connected to the test bench (2) in the front and rear directions. A transverse limiting column (34) is rotatably installed between the left and right longitudinal sections of the L-shaped plate (33). An adjusting member for adjusting the positions of the two longitudinal limiting columns (32) is provided at the upper end of the test bench (2); The testing unit (4) includes a moving plate (41) disposed above the test bench (2). A compressive testing component and a flexural testing component are provided at the lower end of the moving plate (41). The compressive testing component includes a U-shaped frame (42) installed in the middle of the lower end of the moving plate (41). Uniformly arranged pressing blocks (43) are provided inside the U-shaped frame (42). An installation component is provided between the pressing block (43) and the moving plate (41). The flexural testing component includes two pressing columns (421) distributed left and right with respect to the U-shaped frame (42). An adjusting component for changing the positions of the pressing columns (421) is provided at the upper end of the moving plate (41); A support component is provided between the moving plate (41) and the test bench (2). A locking member for locking the longitudinal limiting column (32) and the transverse limiting column (34) is provided at the lower end of the moving plate (41).

2. A high-strength permeable concrete strength testing device according to claim 1, characterized in that: The adjusting member includes adjusting plates (311) respectively provided at the middle parts of the lower ends of the longitudinal sections of the two U-shaped plates (31). Transverse sliding grooves (312) which are slidably connected to the adjusting plates (311) left and right are provided at the upper end of the test bench (2). Rectangular holes (313) which are uniformly arranged left and right are provided at the upper ends of the adjusting plates (311). Rectangular blocks (314) which are matched with the corresponding rectangular holes (313) are installed at the lower ends of the longitudinal sections of the U-shaped plate (31).

3. A high-strength permeable concrete strength testing device according to claim 1, characterized in that: A control component for controlling the synchronous and opposite movement of the two U-shaped plates (31) on the left and right and the two L-shaped plates (33) on the front and rear respectively is provided at the lower end of the test bench (2). The control component includes a rectangular groove (321) provided at the lower end of the test bench (2). Support rods are respectively installed at the middle parts of the lower ends of the transverse sections of the two L-shaped plates (33) on the front and rear. Longitudinal sliding grooves (322) which are slidably connected to the support rods front and rear are provided at the upper end of the test bench (2). A control plate (323) is provided inside the rectangular groove (321). Control rods (324) which are hinged to the corresponding side ends of the control plate (323) are respectively hinged at the lower ends of the side of the adjusting plate (311) close to the center of the test bench (2) and the lower ends of the support rods. Avoidance grooves for avoiding the control rods (324) are provided at the top wall of the rectangular groove (321). The lower end of the control plate (323) is connected to the pushing section of an electric push rod (325). The electric push rod (325) is installed in the rectangular groove (321) through a mounting seat.

4. A high-strength permeable concrete strength testing device according to claim 1, characterized in that: The installation component includes a rectangular rod (411) installed at the upper end of the pressing block (43) and sliding up and down with the moving plate (41). A clamping plate (412) is installed at the upper end of the rectangular rod (411). Above the moving plate (41), a plurality of supporting plates (413) are arranged in a left-right cross arrangement with each column of rectangular rods (411). The clamping plates (412) in the same column are jointly located at the upper ends of the corresponding supporting plates (413). At the lower end of the supporting plate (413), supporting sliders (414) are evenly arranged front and back and slidably connected to the front and back upper surfaces of the moving plate (41). A cross plate is jointly installed between the front ends of the left-right arranged supporting plates (413). The distance between the lower end surface of the clamping plate (412) and the upper end surface of the moving plate (41) is equal to the thickness of the pressing block (43). The distance between the lower end surface of the supporting plate (413) and the upper end surface 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).

5. A high-strength permeable concrete strength testing device according to claim 1, characterized in that: The adjusting component includes an inverted U-shaped plate (423). A pressing column (421) is rotatably installed between the front and rear vertical sections of the inverted U-shaped plate (423). Above the horizontal section of the inverted U-shaped plate (423), an adjusting plate (422) is arranged and slidably connected to the left and right of the lower end surface of the moving plate (41). Between the adjusting plate (422) and the horizontal section of the inverted U-shaped plate (423), installation columns are evenly arranged front and back. On the far sides of the front and rear vertical sections of the inverted U-shaped plate (423), rib plates (424) are installed and slidably connected to the left and right of the moving plate (41). At the upper end of the adjusting plate (422), an adjusting block (425) is installed and penetrates through the moving plate (41). An adjusting through groove for the left-right sliding connection of the adjusting block (425) is opened on the moving plate (41). On both sides of the front and rear of the adjusting through groove, inverted U-shaped blocks (427) are evenly arranged left and right and installed on the upper end of the moving plate (41). 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).

6. A high-strength permeable concrete strength testing device according to claim 1, characterized in that: The supporting component includes connecting rods (431) hinged to the front, rear, left, and right ends of the moving plate (41). At the position corresponding to the connecting rod (431) on the upper end of the test bench (2), a guide groove plate (211) is installed. At the lower end of the connecting rod (431), a pin shaft is rotatably installed and slidably connected to the corresponding guide groove plate (211).

7. A high-strength permeable concrete strength testing device according to claim 1, characterized in that: Between the left and right C-shaped plates (31) and the front and rear U-shaped plates (33), there is a connecting piece. The connecting piece includes cross bars (331) installed at the closer ends of the transverse sections of the left and right C-shaped plates (31), and the two cross bars (331) are arranged in an up-and-down staggered manner. The upper cross bar (331) is slidably connected to the left and right of the left C-shaped plate (31), and the lower cross bar (331) is slidably connected to the left and right of the right C-shaped plate (31). At the front end of the longitudinal section of the rear U-shaped plate (33), a connecting plate (332) is installed. At the rear end of the longitudinal section of the front U-shaped plate (33), an insertion plate (333) is installed. The insertion plate (333) is slidably matched with the opening groove opened on the corresponding connecting plate (332).

8. A high-strength permeable concrete strength testing device according to claim 7, characterized in that: The locking member comprises a first plug hole (341) evenly arranged on the left and right sides of the cross bar (331), a second plug hole (342) is provided inside the connecting plate (332), the plug plate (333) and the corresponding rectangular hole (313), a plug post (343) is installed at the position of the lower end of the movable plate (41) corresponding to the cross bar (331) and the horizontal slide groove (312), the first plug hole (341) and the second plug hole (342) are plugged and matched with the corresponding plug post (343), and a through hole (344) connected to the rectangular groove (321) is provided at the position of the upper end of the test bench (2) corresponding to the plug post (343).

9. A high-strength permeable concrete strength testing device according to claim 1, characterized in that: The upper end of the test bench (2) is provided with four guide columns (21) which are slidably matched with the movable plate (41) and are distributed in a rectangular shape. The guide columns (21) are sleeved with buffer springs (22) which are connected between the movable plate (41) and the test bench (2). A top plate connected to the pressure testing machine (1) is installed between the upper ends of the guide columns (21). A pushing frame (24) is installed at the upper end of the movable plate (41). The upper end of the pushing frame (24) is connected to a pushing section of a hydraulic cylinder (25) installed on the top plate.

10. A high-strength permeable concrete strength testing device according to claim 1, characterized in that: Two side plates (315) distributed left and right are installed on the upper ends of the front and rear two U-shaped plates (33), and the ends of the front and rear two side plates (315) that are close to each other are inclined outwards.

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