Concrete strength testing device

Abstract

The utility model relates to the technical field of concrete strength testing, in particular to a concrete strength testing device which comprises an installation table, supporting columns are fixedly installed at the positions, close to corners, of the top face of the installation table, and a top plate is jointly and fixedly installed on the top faces of the four supporting columns. A hydraulic cylinder is fixedly installed on the top face of the top plate, and a pressing block is fixedly installed at the telescopic end of the hydraulic cylinder. A protection mechanism located between the top plate and the mounting table is slidably mounted among the four supporting columns, and the telescopic end of the hydraulic cylinder extends into the protection mechanism. According to the utility model, the protective mechanism is arranged, so that chips splashed from the concrete sample block are limited in the protective cover cylinder in the pressure loading process of the concrete sample block; and in addition, the concrete sample block can be accurately placed in the middle through the arrangement of four limiting assemblies in the protection mechanism, so that the concrete sample block is located under the pressing block, and the stress uniformity of the top surface of the concrete sample block is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete strength testing, and specifically relates to a concrete strength testing device. Background Technique

[0002] Concrete is one of the most commonly used construction materials in construction. In order to ensure the safety of the building, it is necessary to detect the strength of the concrete; the common detection method is to conduct a compressive strength test on the concrete sample block to ensure that the strength index of the concrete meets the relevant standards and specifications.

[0003] The existing concrete strength detection devices usually include a detection table, a pressure sensor and a hydraulic cylinder. When in use, the concrete sample block is placed on the detection table, and the hydraulic cylinder drives the pressing block to apply a load to the concrete sample block. The pressure sensor records the magnitude of the pressure. During the process, the strain, deformation and other data of the concrete sample block during loading are observed and recorded, so as to complete the compressive strength detection work of the concrete.

[0004] However, the existing detection devices still have the following deficiencies when in use:

[0005] When the concrete sample block is crushed, debris will splash, which poses a threat to the detection personnel. In addition, the alignment accuracy between the concrete sample block and the pressing block after being placed on the detection table is relatively low, and the problem of uneven load distribution on the bottom surface of the concrete sample block may occur, resulting in the failure form of the sample not conforming to the standard compressive failure form, and reducing the accuracy of the detection result. Content of the Utility Model

[0006] The purpose of the utility model is to provide a concrete strength testing device to solve the problems put forward in the above background technique.

[0007] The purpose of the utility model can be realized by the following technical solutions:

[0008] A concrete strength testing device includes an installation table. The bottom surface of the installation table is fixedly installed with supporting feet at the corners, and the top surface of the installation table is fixedly installed with columns near the corners. The top surfaces of the four columns are jointly fixedly installed with a top plate located directly above the installation table; the center position of the top surface of the top plate is fixedly installed with a hydraulic cylinder. The telescopic end of the hydraulic cylinder slides through the top plate to the lower part of the top plate, and the telescopic end of the hydraulic cylinder is fixedly installed with a pressing block.

[0009] A protection mechanism is slidably installed between the four columns and is located between the top plate and the installation table. The telescopic end of the hydraulic cylinder extends into the interior of the protection mechanism.

[0010] A limiting mechanism is fixedly installed in the protection mechanism. The limiting mechanism includes four groups of limiting components, and the four groups of limiting components are circumferentially arrayed about the axis of the hydraulic cylinder in the limiting mechanism.

[0011] Furthermore, the protection mechanism includes a protective cover cylinder arranged between the four struts. Four first bumps aligned with the four struts respectively are fixedly installed on the periphery of the protective cover cylinder, and one ends of the four first bumps far away from the protective cover cylinder are respectively slidably connected to the peripheries of the four struts.

[0012] A circular hole coaxial with the protective cover cylinder is formed in the top surface of the protective cover cylinder. The telescopic end of the hydraulic cylinder passes through the top surface of the protective cover cylinder to the inside of the protective cover cylinder through the circular hole, and the diameter of the circular hole is smaller than the diameter of the pressing block.

[0013] Furthermore, the protective cover cylinder is made of a transparent material.

[0014] Furthermore, the limiting component includes a limiting shaft and a mounting plate arranged outside the protective cover cylinder. Guide rods are fixedly connected to both ends of the side surface of the mounting plate close to the protective cover cylinder, and one ends of the guide rods far away from the mounting plate are fixedly connected to the periphery of the protective cover cylinder.

[0015] A threaded rod parallel to the guide rod is rotatably installed at the middle position of the side surface of the mounting plate close to the protective cover cylinder.

[0016] The limiting shaft is of a hollow structure. Threads matched with the threaded rod are arranged on the inner wall of the limiting shaft. The limiting shaft is sleeved on one end of the threaded rod far away from the mounting plate, and the threaded rod is in threaded connection with the limiting shaft. One end of the limiting shaft far away from the threaded rod slidably penetrates through the protective cover cylinder to the inside of the protective cover cylinder. Two symmetrically distributed second bumps are fixedly installed on the periphery of the limiting shaft near one end of the mounting plate, and one ends of the two second bumps far away from the limiting shaft are respectively slidably connected to the peripheries of the two guide rods.

[0017] One end of the threaded rod far away from the protective cover cylinder rotatably penetrates through the mounting plate and is fixedly installed with a hand wheel.

[0018] Furthermore, limiting scales are arranged on the periphery of the limiting shaft.

[0019] Furthermore, a mounting disc is fixedly installed at one end of the limiting shaft located inside the protective cover cylinder. A mounting seat is fixedly installed on one side of the mounting disc far away from the limiting shaft. A limiting wheel is rotatably installed in the mounting seat, and the rotation axis of the limiting wheel is perpendicular to the axis of the protective cover cylinder.

[0020] The beneficial effects of the present utility model:

[0021] Through the provision of a protection mechanism, during the pressure loading process of the concrete sample block, the splashed debris of the concrete sample block is limited within the protective cover cylinder, effectively preventing harm to the testing personnel. Moreover, through the provision of four groups of limiting components in the protection mechanism, the concrete sample block can be accurately centered and placed, so that the concrete sample block is located directly below the pressing block, ensuring the uniformity of the force on the top surface of the concrete sample block and facilitating the improvement of the accuracy of the test results. Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 is a three-dimensional schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a three-dimensional schematic diagram of the internal structure of the protective cover cylinder in the present invention;

[0025] Figure 3 is Figure 2 a three-dimensional schematic diagram from another angle;

[0026] Figure 4 is Figure 2 an enlarged view of part A in

[0027] Figure 5 is Figure 3 an enlarged view of part B in

[0028] Among them, the reference numerals are as follows:

[0029] 1 - mounting table, 2 - support feet, 3 - columns, 4 - top plate, 5 - hydraulic cylinder, 6 - protective cover cylinder, 7 - first convex block, 8 - limiting components, 9 - round holes, 10 - pressing block, 11 - mounting disc, 12 - mounting seat, 13 - limiting wheels, 14 - mounting plate, 15 - handwheel, 16 - guide rod, 17 - second convex block, 18 - threaded rod, 19 - limiting shaft, 20 - limiting scale. Detailed Embodiment

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0031] Embodiment 1:

[0032] Please refer to Figures 1 to 5 , in the embodiment of the present utility model, a concrete strength testing device includes a mounting table 1. At the corners of the bottom surface of the mounting table 1, supporting feet 2 are fixedly installed. At positions near the corners on the top surface of the mounting table 1, columns 3 are fixedly installed. On the top surfaces of the four columns 3, a top plate 4 located directly above the mounting table 1 is fixedly installed together; at the center position of the top surface of the top plate 4, a hydraulic cylinder 5 is fixedly installed. The telescopic end of the hydraulic cylinder 5 slides through the top plate 4 to the lower side of the top plate 4, and a pressing block 10 is fixedly installed at the telescopic end of the hydraulic cylinder 5;

[0033] A protection mechanism is slidably installed between the four columns 3 and is located between the top plate 4 and the mounting table 1. The telescopic end of the hydraulic cylinder 5 extends into the interior of the protection mechanism;

[0034] A limiting mechanism is fixedly installed in the protection mechanism. The limiting mechanism includes four groups of limiting components 8, and the four groups of limiting components 8 are circumferentially arrayed about the axis of the hydraulic cylinder 5 in the limiting mechanism.

[0035] Among them, the protection mechanism includes a protective cover cylinder 6 arranged between the four columns 3. Four convex blocks 7 aligned with the four columns 3 respectively are fixedly installed on the periphery of the protective cover cylinder 6. One ends of the four convex blocks 7 far away from the protective cover cylinder 6 are respectively slidably connected with the peripheries of the four columns 3;

[0036] A circular hole 9 coaxial with the protective cover cylinder 6 is opened on the top surface of the protective cover cylinder 6. The telescopic end of the hydraulic cylinder 5 passes through the top surface of the protective cover cylinder 6 through the circular hole 9 to the interior of the protective cover cylinder 6. The diameter of the circular hole 9 is smaller than the diameter of the pressing block 10.

[0037] Among them, the protective cover cylinder 6 is made of a transparent material.

[0038] Among them, the limiting component 8 includes a limiting shaft 19 and a mounting plate 14 arranged outside the protective cover cylinder 6. At both ends of the side surface of the mounting plate 14 close to the protective cover cylinder 6, guide rods 16 are fixedly connected. One ends of the guide rods 16 far away from the mounting plate 14 are fixedly connected with the periphery of the protective cover cylinder 6;

[0039] A threaded rod 18 parallel to the guide rod 16 is rotatably installed at the middle position of the side surface of the mounting plate 14 close to the protective cover cylinder 6;

[0040] The limiting shaft 19 is of a hollow structure. Threads for cooperating with the threaded rod 18 are provided on the inner wall of the limiting shaft 19. The limiting shaft 19 is sleeved on one end of the threaded rod 18 away from the mounting plate 14, and the threaded rod 18 is threadedly connected to the limiting shaft 19. One end of the limiting shaft 19 away from the threaded rod 18 slides through the protective cover cylinder 6 to the inside of the protective cover cylinder 6. Two symmetrically distributed second convex blocks 17 are fixedly installed on the periphery of the limiting shaft 19 near one end of the mounting plate 14. One ends of the two second convex blocks 17 away from the limiting shaft 19 are respectively slidably connected to the peripheries of the two guide rods 16;

[0041] One end of the threaded rod 18 away from the protective cover cylinder 6 rotatably penetrates through the mounting plate 14 and is fixedly provided with a hand wheel 15.

[0042] Wherein, limiting scales 20 are provided on the periphery of the limiting shaft 19. The limiting scale 20 aligned with the intersection of the protective cover cylinder 6 and the limiting shaft 19 is the distance value between the front end of the limiting shaft 19 and the axis of the protective cover cylinder 6.

[0043] When the utility model is in use:

[0044] The utility model is applicable to concrete sample blocks in the shape of rectangular blocks or cylindrical blocks; initially, the hydraulic cylinder 5 is in a contracted state, and the protective cover cylinder 6 is supported above the mounting table 1 through the pressing block 10, so that there is an operating space for placing the concrete sample block between the protective cover cylinder 6 and 1;

[0045] When installing the concrete sample block, first roughly place the concrete sample block at the middle position on the top surface of the mounting table 1, and then start the hydraulic cylinder 5 to drive the pressing block 10 to apply pressure loading to the concrete sample block. Before the pressing block 10 contacts the concrete sample block, the protective cover cylinder 6 will slide linearly under the action of gravity in cooperation with the sliding connection between the first convex block 7 and the support column 3 until the bottom surface of the protective cover cylinder 6 contacts the top surface of the mounting table 1, thereby wrapping the concrete sample block inside; at this time, stop the hydraulic cylinder 5 so that the pressing block 10 is between the top surface of the concrete sample block and the top surface of the protective cover cylinder 6; then the concrete sample block is further centered by the limiting assembly 8. Specifically, when the concrete sample block is a cylindrical block, rotate the threaded rod 18 through the hand wheel 15. The rotation of the threaded rod 18 in cooperation with the sliding connection between the second convex block 17 and the guide rod 16 makes the limiting shaft 19 slide towards the inside of the protective cover cylinder 6. Observe the limiting scale 20 during the process so that the distance between the front end of the limiting shaft 19 and the axis of the protective cover cylinder 6 is equal to the radius of the concrete sample block; then perform limiting operations on the remaining limiting assemblies 8 in sequence, so that the concrete sample block is accurately centered on the top surface of the mounting table 1 and directly below the pressing block 10;

[0046] When the concrete sample block is a rectangular block, in a set of limiting components 8, drive the limiting shaft 19 and cooperate with observing the limiting scale 20 to make the distance between the limiting shaft 19 and the axis of the protective cover cylinder 6 equal to half of the bottom length of the concrete sample block. Then, make the distance between the front end of the limiting shaft 19 in an adjacent set of limiting components 8 and the axis of the protective cover cylinder 6 be half of the ground width of the concrete sample block. Finally, squeeze and contact the limiting shaft 19 in the remaining two sets of limiting components 8 with the concrete sample block, so as to complete the precise centering placement of the concrete sample block;

[0047] After centering the placement of the concrete sample block, start the hydraulic cylinder 5 to drive the pressing block 10 to apply pressure to the concrete sample block, so as to carry out strength detection;

[0048] Through the setting of the protection mechanism of the present utility model, during the pressure loading process of the concrete sample block, the splashed debris of the concrete sample block is limited in the protective cover cylinder 6, thus effectively preventing harm to the testing personnel;

[0049] And through the setting of the four sets of limiting components 8 in the protection mechanism, the concrete sample block can be precisely centered and placed, so that the concrete sample block is located directly below the pressing block 10, ensuring the uniformity of the force on the top surface of the concrete sample block and being beneficial to improving the accuracy of the detection result.

[0050] Embodiment 2:

[0051] Please refer to Figure 4 , on the basis of Embodiment 1, an installation disk 11 is fixedly installed at one end of the limiting shaft 19 located inside the protective cover cylinder 6. An installation seat 12 is fixedly installed on the side of the installation disk 11 away from the limiting shaft 19. A limiting wheel 13 is rotatably installed in the installation seat 12, and the rotation axis of the limiting wheel 13 is perpendicular to the axis of the protective cover cylinder 6.

[0052] Through the setting of the limiting wheel 13, the distance between the limiting wheel 13 and the axis of the protective cover cylinder 6 can be adjusted according to the size of the concrete sample block before detection. During the descent of the pressing block 10, first control the hydraulic cylinder 5 to drive the pressing block 10 to descend above the concrete sample block, and the height of the pressing block 10 is less than the height of the inner top surface of the protective cover cylinder 6; during the process, if the protective cover cylinder 6 can descend smoothly, it means that the concrete sample block is already in the centered position; when there is a certain deviation in the concrete sample block, the top surface of the concrete sample block will get stuck between the four limiting wheels 13, thus preventing the descent of the protective cover cylinder 6. At this time, press the protective cover cylinder 6 to make the bottom surface of the protective cover cylinder 6 contact the top surface of the installation table 1. During the process, with the guiding and squeezing effects of the four limiting wheels 13, the concrete sample block can be quickly limited to the centered position, thereby improving the convenience of the precise centering operation.

[0053] The basic principle, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed.

Claims

1. A concrete strength testing device, comprising a mounting platform (1), wherein the bottom surface of the mounting platform (1) is fixedly mounted with supporting feet (2) at the corners, the top surface of the mounting platform (1) is fixedly mounted with supporting posts (3) at positions close to the corners, and the top surfaces of four supporting posts (3) are jointly fixedly mounted with a top plate (4) located directly above the mounting platform (1); characterized in that: A hydraulic cylinder (5) is fixedly mounted at the center of the top surface of the top plate (4); the telescopic end of the hydraulic cylinder (5) slides through the top plate (4) to the bottom of the top plate (4); and a pressure block (10) is fixedly mounted at the telescopic end of the hydraulic cylinder (5); A protective mechanism located between the top plate (4) and the mounting platform (1) is slidably mounted between the four pillars (3), and the telescopic end of the hydraulic cylinder (5) extends into the interior of the protective mechanism; A limiting mechanism is fixedly installed in the protection mechanism, the limiting mechanism comprising four groups of limiting components (8), the four groups of limiting components (8) being distributed in an array circumferentially about the axis of the hydraulic cylinder (5) in the limiting mechanism.

2. A concrete strength testing device according to claim 1, characterized in that: The protection mechanism comprises a protection cover tube (6) arranged between the four pillars (3), and four protrusions (7) respectively aligned with the four pillars (3) are fixedly mounted on the periphery of the protection cover tube (6), and one end of the four protrusions (7) away from the protection cover tube (6) is respectively slidably connected to the periphery of the four pillars (3); The top surface of the protective cover tube (6) is provided with a circular hole (9) coaxial with the protective cover tube (6), and the telescopic end of the hydraulic cylinder (5) passes through the top surface of the protective cover tube (6) to the inside of the protective cover tube (6) through the circular hole (9), and the diameter of the circular hole (9) is smaller than the diameter of the pressing block (10).

3. A concrete strength testing device according to claim 2, characterized in that: The protective cover tube (6) is made of transparent material.

4. A concrete strength testing device according to claim 2, characterized in that: The limiting assembly (8) comprises a limiting shaft (19) and a mounting plate (14) arranged outside the protective cover tube (6); guide rods (16) are fixedly connected to both ends of the side surface of the mounting plate (14) close to the protective cover tube (6); and one end of the guide rod (16) away from the mounting plate (14) is fixedly connected to the periphery of the protective cover tube (6); A threaded rod (18) arranged parallel to the guide rod (16) is rotatably mounted on the mounting plate (14) at a middle position of a side surface close to the protective cover tube (6); The limiting shaft (19) is a hollow structure, and a thread for use with the threaded rod (18) is arranged on the inner wall of the limiting shaft (19). The limiting shaft (19) is sleeved on the end of the threaded rod (18) away from the mounting plate (14), and the threaded rod (18) and the limiting shaft (19) are threadedly connected. The end of the limiting shaft (19) away from the threaded rod (18) slides through the protective cover tube (6) to the inside of the protective cover tube (6), and the outer periphery of the limiting shaft (19) is fixedly mounted with two symmetrically distributed protrusions (17) at one end close to the mounting plate (14), and the ends of the two protrusions (17) away from the limiting shaft (19) are respectively slidably connected to the outer peripheries of the two guide rods (16); One end of the threaded rod (18) away from the protective cover tube (6) rotates through the mounting plate (14) and is fixedly mounted with a hand wheel (15).

5. A concrete strength testing device according to claim 4, characterized in that: A limit scale (20) is provided on the periphery of the limit shaft (19).

6. A concrete strength testing device according to claim 4, characterized in that: A mounting plate (11) is fixedly mounted on one end of the limiting shaft (19) located inside the protective cover tube (6); a mounting seat (12) is fixedly mounted on a side of the mounting plate (11) away from the limiting shaft (19); a limiting wheel (13) is rotatably mounted in the mounting seat (12); and a rotation axis of the limiting wheel (13) is perpendicular to an axis of the protective cover tube (6).

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