Concrete strength and durability testing device
By designing a concrete strength and durability test device for linkage clamping structure and switching clamping structure, the problems of low detection efficiency and limited application scope caused by manual clamping in the prior art are solved, and efficient clamping and detection of samples of different shapes are achieved.
Patent Information
- Application Number
- CN202421773184.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-25
AI Technical Summary
The existing concrete pressure-resistant detection technology requires manual clamping of samples when applying pressure, resulting in low detection efficiency and the clamping structure cannot adapt to concrete samples of different shapes, and the scope of application is limited.
A concrete strength and durability test device including a linkage clamping structure and a switching clamping structure is designed. The linkage clamping structure drives the pressure plate downward through the electro-hydraulic cylinder, and uses gears and bidirectional screw mechanisms to achieve clamping and fixing of the square samples. The switching clamping structure is used to adapt to the clamping of the cylinder-like sample through the switching direction of the semicircular plate and the n-type pull rod.
It improves the detection efficiency, realizes clamping and fixing of concrete samples of different shapes, and expands the scope of application of the test device.
Smart Images
Figure CN222926541U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of concrete curing strength detection, and in particular relates to a concrete strength and durability testing device. Background Art
[0002] Concrete compressive strength testing is an important means of evaluating concrete quality, and plays a vital role in the design, construction and quality control of buildings, bridges and other important infrastructure. Currently, this type of testing mainly relies on pressure equipment, such as hydraulic presses, to apply pressure to concrete samples to measure the maximum pressure they withstand, thereby determining the compressive strength of concrete.
[0003] The existing concrete compression test technology generally places the concrete sample in a hydraulic press or other pressure equipment, and then gradually increases the pressure until the concrete breaks. During this process, the compression resistance of the concrete can be determined based on the readings of the hydraulic cylinder or hydraulic press. Although this method is relatively direct and easy to operate, it also has some problems.
[0004] The strength and durability testing device of concrete in the prior art has the following disadvantages during use:
[0005] First, in the process of applying pressure to the concrete sample, a clamping device is generally required to stabilize the sample to ensure that the sample is not easy to move or slide on the device during the process of applying pressure. However, the clamping device needs to be manually clamped and fixed to the concrete sample in advance, and it is impossible to cause the clamping device to be linked to clamp the sample during the downward movement of the pressure structure, resulting in low detection efficiency. Secondly, the clamping structure is not transformable, resulting in only clamping and fixing concrete samples with square structures, and unable to clamp and fix concrete samples with columnar structures, resulting in limited scope of application. Therefore, a concrete strength and durability testing device is needed. Utility Model Content
[0006] The utility model aims to provide a concrete strength and durability testing device to solve the problems raised in the above background technology.
[0007] To achieve the above object, the utility model provides the following technical solutions: a strength and durability test device for concrete, comprising a test platform, the top of which is fixedly connected to an n-type bracket, the top of which is fixedly connected to an electric hydraulic cylinder, the telescopic end of the electric hydraulic cylinder movably penetrates the n-type bracket and is fixedly connected to a pressure plate;
[0008] It also includes a linkage clamping structure and two symmetrically arranged switching clamping structures. The linkage clamping structure is installed on the detection table and connected to the top of the pressure plate. The two switching clamping structures are symmetrically arranged and installed on the linkage clamping structure.
[0009] As a preferred embodiment, the linkage clamping structure includes two symmetrically arranged moving seats opened on the testing platform, the vertical cross-sections of the moving seats are both I-shaped structures, the top ends of the moving seats are rotatably connected to semicircular plates through rotating shafts, and the side walls of the two semicircular plates facing each other are each provided with a V-shaped clamping opening for clamping and fixing the cylindrical concrete sample, and the side walls of the two semicircular plates facing each other are each fixedly connected with a clamping plate.
[0010] As a preferred embodiment, two symmetrically arranged push-pull rods are hinged on the side walls of the two movable seats that are opposite to each other, and movable blocks are hinged on the ends of the four push-pull rods that are away from the movable seats. The two movable blocks in the same movable groove are threadedly connected to the outer side of the same bidirectional screw, and the bidirectional screws are rotatably connected to the movable groove.
[0011] As a preferred embodiment, the rear ends of the bidirectional screws extend to the rear side of the detection platform and are fixedly connected to gears. Two symmetrically arranged tooth plates are provided between the two gears, and the tooth plates are meshed with the gears. The top ends of the two tooth plates are fixedly connected to the same cross bar, and the front side wall of the cross bar is fixedly connected to the top of the pressure plate by two symmetrically arranged inverted L-shaped connecting rods.
[0012] As a preferred embodiment, the switching clamping structure includes two symmetrically arranged square cavities opened on the inner side of a semicircular plate, and sliding blocks with a square cross-section are slid in the two square cavities. The two sliding blocks are fixed to the outside of the same N-type pull rod, and the N-type pull rod is movably inserted on the semicircular plate. A spring is provided between the top of the sliding block and the inner top wall of the square cavity, and is sleeved on the outside of the N-type pull rod.
[0013] As a preferred embodiment, both ends of the bottom of the n-shaped pull rod are movably inserted into the bottom of the semicircular plate and inserted into the slots opened on the top of the movable seat.
[0014] Compared with the prior art, the concrete strength and durability testing device provided by the utility model has at least the following beneficial effects:
[0015] In the present utility model, when using the device for testing the strength and durability of concrete, the square concrete test sample to be detected is placed on the detection table. By starting the electric hydraulic cylinder, the pressure plate is pushed downward to apply pressure to the square concrete test sample. During the downward movement, due to the arrangement of the two inverted L-shaped connecting rods and the cross bar, the two toothed plates move downward synchronously. However, the toothed plates are both engaged with the gears, so that the two bidirectional screws rotate in different directions. Since the symmetric threads provided on the two bidirectional screws have opposite helix directions, the two movable blocks on each bidirectional screw can move away from each other. Combining with the arrangement of the push-pull rod, the two movable seats can move towards each other, and the two clamping plates are urged to move towards each other, and the concrete test sample can be clamped and fixed. After the toothed plate moves downward, the part without teeth continues to move downward, canceling the transmission to the gear. Therefore, during the downward movement of the pressure plate, it will not affect the clamping work of the two clamping plates on the square concrete test sample. Secondly, when it is necessary to perform pressure testing on a concrete sample in a columnar structure, the n-shaped pull rods on the two semi-circular plates can be pulled, and the bottom ends of the n-shaped pull rods are disengaged from the card slots, and the sliding blocks compress the springs. Thus, the semi-circular plates can rotate through the rotating shafts, and after the V-shaped clamping openings and the clamping plates are reversed in direction, the concrete sample in the columnar structure can be clamped and fixed, greatly improving the applicable range of the device for testing the strength and durability of concrete. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a schematic three-dimensional structure diagram of the whole of the present utility model from the first perspective;
[0017] Figure 2 is a schematic three-dimensional structure diagram of the whole of the present utility model from the second perspective;
[0018] Figure 3 is a schematic diagram of the planar unfolded structure of each component in the clamping structure for switching of the present utility model.
[0019] In the figure: 1, detection table; 2, n-shaped support; 3, electric hydraulic cylinder; 31, pressure plate; 4, linkage clamping structure; 41, movable seat; 42, rotating shaft; 43, semi-circular plate; 44, V-shaped clamping opening; 45, clamping plate; 46, push-pull rod; 47, movable block; 48, bidirectional screw; 49, gear; 410, toothed plate; 411, inverted L-shaped connecting rod; 5, clamping structure for switching; 51, n-shaped pull rod; 52, sliding block; 53, spring; 54, card slot. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] The following further describes the present utility model in conjunction with embodiments.
[0021] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.
[0022] The following examples are used to illustrate the present invention, but cannot be used to limit the scope of protection of the present invention. The conditions in the examples can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.
[0023] Example
[0024] First, in the process of applying pressure to the concrete sample, a clamping device is generally required to stabilize the sample to ensure that the sample is not easy to move or slide on the device during the pressure application process. However, the clamping device needs to be manually clamped and fixed to the concrete sample in advance, and it is impossible to enable the clamping device to clamp the sample in linkage during the downward movement of the pressure structure, resulting in low detection efficiency. Secondly, the clamping structure is not transformable, resulting in only square concrete samples being clamped and fixed, and columnar concrete samples being unable to be clamped and fixed, resulting in limited scope of application.
[0025] To do this, see Figures 1 - 3 The utility model provides a strength and durability test device for concrete, comprising: a test platform 1, a top of the test platform 1 is fixedly connected to an n-type bracket 2, a top of the n-type bracket 2 is fixedly connected to an electric hydraulic cylinder 3, a telescopic end of the electric hydraulic cylinder 3 movably penetrates the n-type bracket 2, and is fixedly connected to a pressing plate 31;
[0026] It also includes a linkage clamping structure 4 and two symmetrically arranged switching clamping structures 5. The linkage clamping structure 4 is installed on the detection platform 1 and connected to the top of the pressure plate 31. The two switching clamping structures 5 are symmetrically installed on the linkage clamping structure 4.
[0027] Further as Figures 1 - 3As shown in the figure, it is worth specifically stating that in order to facilitate the clamping and fixing of the concrete test sample during the downward movement of the pressing plate 31, a linkage clamping structure 4 is provided, which includes two symmetrically arranged moving seats 41 opened on the test bench 1. The vertical cross-sections of the moving seats 41 are all in the shape of an I-shaped structure. The tops of the moving seats 41 are all rotatably connected to semi-circular plates 43 through rotating shafts 42. V-shaped clamping openings 44 for facilitating the clamping and fixing of columnar concrete samples are opened on the side walls of the two semi-circular plates 43 facing away from each other. Clamping plates 45 are fixedly connected to the side walls of the two semi-circular plates 43 facing each other. Two symmetrically arranged push-pull rods 46 are hinged on the side walls of the two moving seats 41 facing away from each other. The ends of the four push-pull rods 46 far from the moving seats 41 are all hinged with movable blocks 47. The two movable blocks 47 in the same moving groove are all threadedly connected to the outside of the same bidirectional screw rod 48. The bidirectional screw rods 48 are all rotatably connected in the moving groove. The rear ends of the bidirectional screw rods 48 all extend to the rear side of the test bench 1 and are fixedly connected with gears 49. Two symmetrically arranged toothed plates 410 are arranged between the two gears 49. The toothed plates 410 are all meshed with the gears 49. The tops of the two toothed plates 410 are fixedly connected with the same cross bar. The front side wall of the cross bar is fixedly connected to the top of the pressing plate 31 through two symmetrically arranged inverted L-shaped connecting rods 411.
[0028] Among them, although there are two symmetrically arranged threads on the bidirectional screw rod 48, for a single thread on the same side of the two bidirectional screw rods 48, the helix directions are opposite. The number of teeth arranged on the toothed plate 410 is set to ensure that after the gear 49 rotates a certain angle, the bidirectional screw rod 48 can be promoted to rotate. However, as the pressing plate 31 moves downward, the toothed plate 410 will gradually cancel the meshing with the gear 49.
[0029] Furthermore, as Figures 1 - 3 shown, it is worth specifically stating that in order to facilitate the switching of the directions of the V-shaped clamping openings 44 and the clamping plates 45 on the semi-circular plate 43, a switching clamping structure 5 is provided, which includes two symmetrically arranged square cavities opened on the inner side of the semi-circular plate 43. Slide blocks 52 with a square cross-sectional structure slide in the two square cavities. The two slide blocks 52 are fixedly connected to the outside of the same n-shaped pull rod 51. The n-shaped pull rod 51 is movably inserted into the semi-circular plate 43. Springs 53 sleeved on the outside of the n-shaped pull rod 51 are arranged between the tops of the slide blocks 52 and the inner top walls of the square cavities. The two ends of the bottom of the n-shaped pull rod 51 are movably inserted to the bottom of the semi-circular plate 43 and are inserted into the clamping slots 54 opened on the tops of the moving seats 41.
[0030] In summary, when using the strength and durability testing device for the concrete, place the square concrete test sample to be detected on the detection table 1, and by starting the electric hydraulic cylinder 3, push the pressing plate 31 downward to apply pressure to the square concrete test sample. During the downward movement, through the arrangement of the two inverted L-shaped connecting rods 411 and the cross bar, the two toothed plates 410 are synchronously moved downward. However, both toothed plates 410 are engaged with the gear 49, so that the two bidirectional screws 48 rotate in different directions. However, the symmetric thread directions provided on the two bidirectional screws 48 are opposite, so that the two movable blocks 47 on each bidirectional screw 48 can move away from each other. Combined with the arrangement of the push-pull rod 46, the two movable seats 41 can move toward each other, and the two clamping plates 45 are urged to move toward each other, and the concrete test sample can be clamped and fixed. After the toothed plate 410 moves downward, the part without teeth continues to move downward, canceling the transmission to the gear 49. Therefore, during the downward movement of the pressing plate 31, the clamping work of the two clamping plates 45 on the square concrete test sample will not be affected. Secondly, when it is necessary to perform pressure detection on the concrete sample in the shape of a column, the n-shaped pull rod 51 on the two semi-circular plates 43 can be pulled, and both bottom ends of the n-shaped pull rod 51 are disengaged from the card slots 54, and the sliding blocks 52 compress the springs 53. Thus, the semi-circular plates 43 can rotate through the rotating shafts 42, and after the direction between the V-shaped clamping openings 44 and the clamping plates 45 is switched, the concrete sample in the shape of a column can be clamped and fixed, greatly improving the application range of the strength and durability testing device for the concrete.
[0031] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the ordinary meanings understood by those with ordinary skills in the field to which the present invention pertains. The words such as "including" or "comprising" used in the present invention mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The words such as "connected" or "coupled" are not limited to physical or mechanical connections, and may also include electrical connections, whether direct or indirect. The words such as "upper", "lower", "left", and "right" are only used to represent relative positional relationships. When the absolute position of the object to be described changes, the relative positional relationship may also change accordingly.
[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A concrete strength and durability testing device, comprising a testing platform (1), characterized in that: The top of the detection platform (1) is fixedly connected to an n-shaped bracket (2), the top of the n-shaped bracket (2) is fixedly connected to an electric hydraulic cylinder (3), the telescopic end of the electric hydraulic cylinder (3) movably penetrates the n-shaped bracket (2) and is fixedly connected to a pressing plate (31); It also comprises a linkage clamping structure (4) and two symmetrically arranged switching clamping structures (5); the linkage clamping structure (4) is mounted on the detection platform (1) and connected to the top of the pressure plate (31); the two switching clamping structures (5) are symmetrically arranged and mounted on the linkage clamping structure (4).
2. A concrete strength and durability testing device according to claim 1, characterized in that: The linkage clamping structure (4) comprises two symmetrically arranged moving seats (41) opened on the detection platform (1), the vertical cross-sections of the moving seats (41) are both I-shaped structures, the top ends of the moving seats (41) are rotatably connected to semicircular plates (43) via rotating shafts (42), the side walls of the two semicircular plates (43) facing away from each other are both provided with V-shaped clamping openings (44) for clamping and fixing a columnar concrete sample, and the side walls of the two semicircular plates (43) facing each other are both fixedly connected to clamping plates (45).
3. A concrete strength and durability testing device according to claim 2, characterized in that: Two push-pull rods (46) are hingedly connected to the opposite side walls of the two movable seats (41), and one end of the four push-pull rods (46) away from the movable seat (41) is hingedly connected to a movable block (47). The two movable blocks (47) in the same movable groove are threadedly connected to the outer side of the same bidirectional screw (48), and the bidirectional screw (48) is rotatably connected to the movable groove.
4. A concrete strength and durability testing device according to claim 3, characterized in that: The rear ends of the bidirectional screws (48) extend to the rear side of the detection platform (1) and are fixedly connected to a gear (49). Two symmetrically arranged toothed plates (410) are arranged between the two gears (49). The toothed plates (410) are meshed with the gears (49). The top ends of the two toothed plates (410) are fixedly connected to the same crossbar. The front side wall of the crossbar is fixedly connected to the top of the pressure plate (31) through two symmetrically arranged inverted L-shaped connecting rods (411).
5. A concrete strength and durability testing device according to claim 4, characterized in that: The switching clamping structure (5) comprises two symmetrically arranged square cavities opened on the inner side of a semicircular plate (43), and sliding blocks (52) with a square cross-section are slid in the two square cavities. The two sliding blocks (52) are fixedly connected to the outer side of the same N-type pull rod (51), and the N-type pull rod (51) is movably inserted on the semicircular plate (43). A spring (53) sleeved on the outer side of the N-type pull rod (51) is provided between the top of the sliding block (52) and the inner top wall of the square cavity.
6. A concrete strength and durability testing device according to claim 5, characterized in that: Both ends of the bottom of the n-shaped pull rod (51) are movably inserted into the bottom of the semicircular plate (43) and inserted into the card slot (54) opened on the top of the movable seat (41).