A device for testing the crack resistance of concrete
By designing a concrete crack resistance testing device with a base, electrical control box, specimen tilting and unloading mechanism, and support mechanism, the problems of cumbersome handling and safety hazards in the existing technology have been solved, and efficient and safe concrete crack resistance testing has been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- INNER MONGOLIA TRANSPORTATION GROUP XINGTAI CONSTRUCTION ENGINEERING CO LTD
- Filing Date
- 2025-08-22
- Publication Date
- 2026-06-19
AI Technical Summary
Existing concrete crack resistance testing devices rely on large lifting equipment to repeatedly move concrete test blocks, resulting in cumbersome operation procedures, frequent equipment switching, and risks of test blocks falling off, collision scratches, and damage to the testing platform.
A concrete crack resistance testing device was designed, comprising a base, an electrical control box, a specimen tilting and unloading mechanism, and a support mechanism. The device utilizes a hydraulic cylinder and a tilting and unloading mechanism to achieve smooth tilting and rapid unloading of the test platform. Combined with C-clamps, the specimens are stably limited, reducing manual handling operations.
It improved testing efficiency, reduced workload, avoided safety hazards during specimen handling, and ensured the reliability and accuracy of the loading process.
Smart Images
Figure CN224383012U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of concrete testing, specifically a concrete crack resistance testing device. Background Technology
[0002] Concrete is an artificial stone material formed by mixing cement, aggregates (such as sand and crushed stone), water, and a small amount of admixtures or additives in a certain proportion, pouring it into shape, and allowing it to harden. It has high compressive strength, good workability, and durability, and is widely used in infrastructure such as buildings, bridges, roads, and tunnels. The crack resistance of concrete refers to its comprehensive ability to delay the initiation of cracks, limit crack width, and maintain fine and uniform cracks when subjected to various factors such as autogenous shrinkage, temperature changes, external loads, or chemical effects during use. Its quality depends on the mix design, aggregate gradation, use of water-reducing agents and fiber-reinforcing materials, reinforcement methods, and curing conditions, and can be evaluated through methods such as crack-resistant plate tests and three-point bending tests.
[0003] Existing concrete crack resistance testing devices rely on large lifting equipment such as cranes to repeatedly move heavy concrete specimens to the testing platform and remove them after the test. This not only results in a cumbersome workflow and frequent equipment switching, severely limiting overall testing efficiency, but also poses potential risks such as specimen detachment, collision scratches, and damage to the testing platform during movement and positioning. Based on this, this utility model designs a concrete crack resistance testing device to solve the above problems. Utility Model Content
[0004] The purpose of this invention is to provide a concrete crack resistance testing device to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A concrete crack resistance testing device includes a base and an electrical control box. The electrical control box is fixedly installed on the inner wall of the base. A specimen tilting and unloading mechanism is provided above the base, and a support mechanism is provided on the outer side of the specimen tilting and unloading mechanism. Support keels are fixedly installed along the left and right ends of the upper part of the base. A top plate is fixedly installed on the upper end of the support keels. A test hydraulic cylinder is fixedly installed in the middle of the top plate. The transmission end of the test hydraulic cylinder is provided with a loading head. A support frame and a first shaft frame are fixedly installed on the upper end of the base. A limit socket is fixedly installed on the upper end of the support frame. A test platform is provided above the limit socket. A first crossbeam is fixedly installed at the front end of the test platform. A connecting block is inserted into the limit socket at the lower end of the first crossbeam. The rear end is provided with a second crossbeam, the lower end of which is fixed with a second shaft frame. The middle hinge support of the test platform is hinged to the crossbar of the supporting keel. The support mechanism includes the supporting keel, a mounting top plate, a test hydraulic cylinder, and C-shaped clamps on both sides of the test platform. The specimen flipping and unloading mechanism includes a support frame, a limit socket, a first shaft frame, a hydraulic cylinder body, a second shaft frame, a test platform, a first crossbeam, a docking block, a second crossbeam, a first collar, a second collar, and a hinge support. The lower end of the hydraulic cylinder body is fixedly installed with a first collar, and the transmission end of the hydraulic cylinder body is fixedly installed with a second collar. The middle parts of the first collar and the second collar are respectively provided with rotating shafts, which are respectively inserted into the corresponding first shaft frame and second shaft frame.
[0007] Optionally, the first collar and the first shaft frame cooperate to form a forward flipping fulcrum, and the second collar and the second shaft frame cooperate to form a rear flipping fulcrum, so as to realize the test bench flipping around the hinge support for unloading.
[0008] Optionally, the test bench is hinged to the middle crossbar of the supporting keel via a hinged support, with the hinged position located at the rear center of the test bench.
[0009] Optionally, the limiting socket and the mating block are plugged into each other for horizontal reset limiting of the test bench.
[0010] Optionally, the test hydraulic cylinder is controlled by an electrical control box, and the loading head contacts the concrete specimen to achieve the pressure boosting test function.
[0011] Optionally, the C-clamps are located on both sides of the test bench to clamp and limit the concrete specimens before testing.
[0012] Optionally, the supporting keel and the mounting top plate form a high-strength frame to ensure stability and reliability during the testing process.
[0013] Optionally, after the hydraulic cylinder completes the flipping and unloading, it extends and resets, restoring the test bench to a horizontal position, and then resets by inserting the mating block back into the limit socket.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] 1. In this utility model, a specimen flipping and unloading mechanism is provided. By reasonably arranging components such as support frame, limit socket, first shaft frame, hydraulic cylinder, second shaft frame, test table, first crossbeam, docking block, second crossbeam, first collar, second collar and hinge support, the test table can be flipped smoothly and unloaded quickly, which greatly reduces manual handling and avoids the risk of secondary injury and difficulty in moving caused by concrete block breakage.
[0016] 2. In this utility model, a support mechanism is provided. Support keels are set at both ends of the base, and a top plate is installed on the upper end of the support keels. A test hydraulic cylinder is arranged in the middle of the top plate to carry out the loading operation. At the same time, C-shaped clamps set on both sides are used to stabilize and limit the specimen. The whole structure forms a high-strength and stable load-bearing structure, ensuring the reliability and accuracy of the loading process. Attached Figure Description
[0017] Figure 1 This is a three-dimensional front view structural diagram of the present invention;
[0018] Figure 2 This is a schematic diagram of the structure of this utility model from a frontal view.
[0019] Figure 3 This is a three-dimensional top view of the structure of this utility model;
[0020] Figure 4 This is a three-dimensional, bottom-view structural diagram of the present invention;
[0021] Figure 5 This is a three-dimensional sectional view of the structure of this utility model. Figure 1 ;
[0022] Figure 6 This is a three-dimensional sectional view of the structure of this utility model. Figure 2 ;
[0023] Figure 7 This is a three-dimensional sectional view of the structure of this utility model. Figure 3 .
[0024] In the diagram: 1. Base; 2. Electrical control box; 3. Specimen flipping and unloading mechanism; 301. Support frame; 302. Limit socket; 303. First shaft frame; 304. Hydraulic cylinder body; 305. Second shaft frame; 306. Test bench; 307. First crossbeam; 308. Connecting block; 309. Second crossbeam; 310. First collar; 311. Second collar; 312. Hinge support; 4. Support mechanism; 401. Support keel; 402. Mounting top plate; 403. Test hydraulic cylinder; 404. C-clamp. Detailed Implementation
[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] Please see Figures 1-7 In this embodiment of the present invention, the concrete crack resistance testing device includes a base 1 and an electrical control box 2. The electrical control box 2 is fixedly installed on the inner wall of the base 1 and is used to control the working status of each component of the device. A specimen flipping and unloading mechanism 3 is provided above the base 1, and a support mechanism 4 is provided on the outside of the specimen flipping and unloading mechanism 3. The two together constitute the core functional structure of the device.
[0029] The support mechanism 4 includes a support keel 401, a mounting plate 402, a test hydraulic cylinder 403, and C-clamps 404. The support keel 401 is fixedly installed at both ends of the base 1. The support keel 401 is used to support the entire upper structure and improve the overall strength of the device. The mounting plate 402 is fixedly installed at the upper end of the support keel 401. The test hydraulic cylinder 403 is installed in the middle of the mounting plate 402 for applying load to the concrete specimen to test its crack resistance. The transmission end of the test hydraulic cylinder 403 is equipped with a loading head. During the test, the loading head directly contacts the specimen to transmit the loading force. Multiple C-clamps 404 are set on both sides of the test platform 306 to fix the specimen before the loading test, ensure its stable position during the loading process, and prevent slippage.
[0030] The specimen flipping and unloading mechanism 3 is used to quickly unload concrete specimens after testing, avoiding the difficulties and risks caused by manual handling of broken specimens. The mechanism includes a support frame 301, a limit socket 302, a first shaft frame 303, a hydraulic cylinder 304, a second shaft frame 305, a test platform 306, a first crossbeam 307, a docking block 308, a second crossbeam 309, a first collar 310, a second collar 311, and a hinged support 312. The support frame 301 and the first shaft frame 303 are fixedly installed on the upper end of the base 1. The limit socket 302 is installed on the upper end of the support frame 301, which is used to cooperate with the docking block 308 at the front end of the test platform 306 to form a limiting structure for the test platform 306 in a horizontal state.
[0031] The front end of the test bench 306 is equipped with a first crossbeam 307, the lower end of which is connected to a docking block 308 and inserted into a limit socket 302. The rear end of the test bench 306 is equipped with a second crossbeam 309, the lower end of which is fixedly equipped with a second shaft frame 305. A hydraulic cylinder 304 is set above the first shaft frame 303. The lower end of the hydraulic cylinder 304 is fixed with a first collar 310 and the transmission end is fixed with a second collar 311. The middle part of the two collars is respectively provided with a rotating shaft, which is inserted into the corresponding first shaft frame 303 and second shaft frame 305, forming the transmission and fulcrum structure of the flipping mechanism. The middle part of the test bench 306 is provided with a hinge support 312, which is fixedly installed on the crossbar in the middle of the support keel 401, serving as the rotation center of the test bench 306 during the flipping process.
[0032] When using the device, the concrete specimen is first placed on the test platform 306 and fixed in position by the C-clamp 404 to ensure that the specimen does not shift. The electrical control box 2 is started to control the test hydraulic cylinder 403 to work. The loading head presses down and gradually applies pressure until the specimen cracks or breaks. The relevant test data is recorded to complete the test. After the test, if the specimen breaks and is no longer suitable for overall transport by crane, the hydraulic cylinder 304 is started to drive the first ring 310 and the second ring 311 to rotate the test platform 306 backward around the hinge support 312. The broken specimen is automatically unloaded into the recycling container behind the test platform 306. After unloading, the hydraulic cylinder 304 extends in the opposite direction to restore the test platform 306 to a horizontal state. The docking block 308 is inserted into the limit socket 302 again to achieve automatic reset and enter the preparation for the next round of testing.
[0033] This device has a compact structure and is easy to operate. Through the combined use of the specimen flipping and unloading mechanism 3 and the support mechanism 4, it not only improves testing efficiency and reduces work intensity, but also effectively avoids safety hazards during specimen handling. It is especially suitable for use in scenarios involving large-scale concrete crack resistance testing.
[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A concrete anti-cracking performance testing device, comprising a base (1) and an electric control box (2), the electric control box (2) is fixedly installed on the inner wall of the base (1), characterized in that: A specimen flipping and unloading mechanism (3) is provided above the base (1). A support mechanism (4) is provided on the outside of the specimen flipping and unloading mechanism (3). A support keel (401) is fixedly installed on the upper left and right sides of the base (1). A top plate (402) is fixedly installed on the upper end of the support keel (401). A test hydraulic cylinder (403) is fixedly installed in the middle of the top plate (402). A loading head is provided at the transmission end of the test hydraulic cylinder (403). A support frame (301) and a support frame (402) are fixedly installed on the upper end of the base (1). A first shaft frame (303) is provided, and a limit socket (302) is fixedly installed on the upper end of the support frame (301). A test platform (306) is provided above the limit socket (302). A first crossbeam (307) is fixedly installed at the front end of the test platform (306). A mating block (308) is inserted into the limit socket (302) at the lower end of the first crossbeam (307). A second crossbeam (309) is provided at the rear end of the test platform (306). A second shaft frame (305) is fixed at the lower end of the second crossbeam (309). The test platform (306) is provided with a first crossbeam (306) and a second shaft frame (305) is fixed at the lower end of the second crossbeam (305). The middle hinged support (312) of 6) is hinged to the crossbar of the supporting keel (401); the supporting mechanism (4) includes the supporting keel (401), the mounting top plate (402), the test hydraulic cylinder (403) and the C-clamps (404) set on both sides of the test table (306); the specimen flipping and unloading mechanism (3) includes the support frame (301), the limit socket (302), the first shaft frame (303), the hydraulic cylinder body (304), the second shaft frame (305), the test table (306), and the first crossbeam (307). The hydraulic cylinder (304) includes a docking block (308), a second crossbeam (309), a first collar (310), a second collar (311), and a hinged support (312). The lower end of the hydraulic cylinder (304) is fixedly equipped with the first collar (310), and the transmission end of the hydraulic cylinder (304) is fixedly equipped with the second collar (311). The middle parts of the first collar (310) and the second collar (311) are respectively provided with rotating shafts, which are respectively inserted into the corresponding first shaft frame (303) and second shaft frame (305).
2. The device for testing the anti-cracking performance of concrete according to claim 1, characterized in that: The first ring (310) cooperates with the first shaft frame (303) to form a front flipping fulcrum, and the second ring (311) cooperates with the second shaft frame (305) to form a rear flipping fulcrum, so as to realize the test table (306) flipping around the hinge support (312) to unload the material.
3. The concrete crack resistance testing device according to claim 1, characterized in that: The test bench (306) is hinged to the middle crossbar of the support keel (401) via a hinged support (312), and the hinge position is located in the middle of the rear of the test bench (306).
4. The concrete crack resistance testing device according to claim 1, characterized in that: The limiting socket (302) and the mating plug (308) are plugged together and used for the horizontal reset limiting of the test bench (306).
5. The concrete crack resistance testing device according to claim 1, characterized in that: The test hydraulic cylinder (403) is controlled by the electrical control box (2), and the loading head contacts the concrete specimen to realize the pressure test function.
6. The concrete crack resistance testing device according to claim 1, characterized in that: The C-clamp (404) is set on both sides of the test bench (306) to clamp and limit the concrete specimen before testing.
7. The concrete crack resistance testing device according to claim 1, characterized in that: The supporting keel (401) and the mounting top plate (402) form a high-strength frame to ensure stability and reliability during the testing process.
8. The concrete crack resistance testing device according to claim 1, characterized in that: After the hydraulic cylinder (304) completes the flipping and unloading, it extends and resets, so that the test platform (306) returns to the horizontal position, and the limit socket (302) is inserted back into the docking block (308) to complete the reset.