Testing device for detecting early-stage crack resistance of concrete

Abstract

The utility model discloses a test device for detecting early crack resistance of concrete, which belongs to the technical field of concrete detection and comprises a base and support boxes fixed on two sides of the top end face of the base. Fastening boxes are detachably and fixedly mounted at the top ends of the two supporting boxes, concrete bodies are fixedly embedded in the top ends of the two supporting boxes, connecting holes are formed in the two ends of each fastening box, and connecting rods inserted into the connecting holes in a matched mode are fixed to the two sides of the top end face of each supporting box; the test device comprises a base, a fastening box is arranged on the base, a connecting rod is arranged on the base, clamping blocks abutting against the top end of the fastening box are elastically connected to the two ends of the connecting rod in an inserted mode, protruding parts are fixed to the two sides of the top end face of the base, and test cross rods are symmetrically installed between the two protruding parts. And the replacement convenience of the concrete main body is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete detection, and particularly relates to a test device for detecting the early anti-cracking performance of concrete. Background Technique

[0002] The anti-cracking property of concrete refers to the ability of concrete to resist cracking. The anti-cracking performance of concrete is a comprehensive performance. In order to ensure the rationality analysis of concrete mix ratio during actual use, anti-cracking tests are usually carried out on concrete; general concrete anti-cracking performance test devices squeeze concrete blocks through extrusion blocks, monitor the pressure of the extrusion blocks in real time, and record the cracking degree of the concrete blocks under different pressures.

[0003] The patent with the application number 202221157665.X discloses a test device for the early anti-cracking performance of concrete, including a base and four groups of sliding columns fixed on the upper surface of the base. A lifting plate is slidably sleeved on the outer surface of the sliding columns. A first hydraulic cylinder and a hydraulic pump station are fixedly connected to the upper surface of the base. The output end of the first hydraulic cylinder is fixedly connected with a first pressure detector. A fixing plate is fixedly connected to the upper surface of the lifting plate. This test device for the early anti-cracking performance of concrete uses a placement box, a top cover, a double-rod hydraulic cylinder and a second pressure detector in cooperation.

[0004] When the above technical solution is used, the concrete block is installed through the placement box, and the bolts on the placement box are tightened to fix the concrete block. When installing and disassembling, multiple bolts need to be tightened and disassembled. And after multiple installations and disassemblies, the bolts will become loose and the threads will be damaged, resulting in poor convenience for testing and installing the concrete block and low service life of the fixing mechanism. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a test device for detecting the early anti-cracking performance of concrete. This test device for detecting the early anti-cracking performance of concrete aims to solve the technical problems that when installing and disassembling, multiple bolts need to be tightened and disassembled, and after multiple installations and disassemblies, the bolts will become loose and the threads will be damaged, resulting in poor convenience for testing and installing the concrete block and low service life of the fixing mechanism in the prior art.

[0007] (2) Technical Solutions

[0008] To solve the above technical problems, the present utility model provides a test device for detecting the early cracking resistance of concrete. The test device for detecting the early cracking resistance of concrete includes a base and support boxes fixed on both sides of the top surface of the base. An extrusion part is arranged on the top of the base. Fixedly installed on the tops of the two support boxes are fastening boxes detachably, and concrete bodies are embedded and fixed on the tops of the two support boxes. Connection holes are opened at both ends of the fastening box. Fixed on both sides of the top surface of the support box are connecting rods that fit and plug into the connection holes. Elastic plugs at both ends of the connecting rod are provided with blocks that abut against the top of the fastening box.

[0009] When using the test device for detecting the early cracking resistance of concrete of this technical solution, support boxes are fixed on both sides of the top surface of the base, and fastening boxes are detachably installed on the tops of the two support boxes. When detecting the concrete body, both ends of the concrete body are fitted and inserted into the support boxes, and the two fastening boxes are sleeved on the tops of the support boxes. After installation, the connecting rods on the tops of the support boxes are fitted and inserted into the connection holes at both ends of the fastening box. During the insertion process, the inner wall of the connection hole squeezes the block to contract into the telescopic groove. After the connecting rod passes through the fastening box, the spring in the telescopic groove pushes the block to protrude on the top of the fastening box and is clamped with the top of the fastening box, so as to keep the fastening box and the support box fixed. After the test, the fastening box can be disassembled after squeezing the block to contract into the telescopic groove, which is convenient for the installation and disassembly of the fastening box and improves the convenience of replacing the concrete body.

[0010] Preferably, raised parts are fixed on both sides of the top surface of the base, and a test cross bar is symmetrically installed between the two raised parts.

[0011] Furthermore, fastening parts are fixed on both sides of the bottom surface of the support box. The raised part fits and plugs between the two fastening parts, and a bolt that abuts against the raised part is threadedly plugged on the side wall of the fastening part.

[0012] Even further, a plurality of support rods are fixedly arranged in a rectangular array on the top of the base, and a positioning plate is fixed on the top of the support rod.

[0013] Even further, a hydraulic rod is fixedly installed on the top of the positioning plate, and a lifting plate is fixedly installed on the top of the extrusion part.

[0014] Even further, the bottom end of the hydraulic rod is fixedly connected to the lifting plate, and positioning rods that are slidably plugged into the positioning plate are fixed on both sides of the top surface of the lifting plate.

[0015] Even further, a telescopic groove is opened at the top of the connecting rod passing through the fastening box, and a spring that abuts against the block is embedded in the telescopic groove.

[0016] (3) Beneficial effects

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] In the present utility model, support boxes are fixedly arranged on both sides of the top surface of the base, and fastening boxes are detachably installed at the tops of the two support boxes. When testing the concrete main body, both ends of the concrete main body are inserted into the support boxes in a fitting manner, and the two fastening boxes are sleeved on the tops of the support boxes. After installation, the connecting rods at the tops of the support boxes are inserted into the connecting holes at both ends of the fastening boxes in a fitting manner. During the insertion process, the inner wall of the connecting hole squeezes the clamping block to contract into the telescopic groove. After the connecting rod passes through the fastening box, the spring in the telescopic groove pushes the clamping block to protrude from the top of the fastening box and is clamped with the top of the fastening box, so as to keep the fastening box and the support box fixed. After the test, the clamping block is squeezed to contract into the telescopic groove and then the fastening box is disassembled, which is convenient for the installation and disassembly of the fastening box and improves the convenience of replacing the concrete main body. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application 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, the following drawings are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 is a schematic structural diagram of the present utility model;

[0021] Figure 2 is a schematic structural diagram of the support box of the present utility model;

[0022] Figure 3 is a schematic structural diagram of the fastening box of the present utility model;

[0023] Figure 4 is a schematic cross-sectional view of the support box of the present utility model.

[0024] The reference signs in the drawings are: 1, base; 2, convex part; 3, bolt; 4, fastening part; 5, fastening box; 6, extrusion part; 7, positioning rod; 8, hydraulic rod; 9, positioning plate; 10, support rod; 11, lifting plate; 12, support box; 13, test cross bar; 14, concrete main body; 15, connecting rod; 16, connecting hole; 17, telescopic groove; 18, clamping block; 19, spring. Detailed Embodiments

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] This specific embodiment is a test device for detecting the early anti-cracking performance of concrete, and its structural schematic diagram is as Figure 1 and Figure 4 shown. The test device for detecting the early anti-cracking performance of concrete includes a base 1 and support boxes 12 fixed on both sides of the top surface of the base 1. An extrusion part 6 is arranged at the top of the base 1. Fastening boxes 5 are detachably and fixedly installed at the tops of the two support boxes 12, and concrete bodies 14 are embedded and fixed at the tops of the two support boxes 12. Connecting holes 16 are formed at both ends of the fastening box 5. Connecting rods 15 that are snugly inserted into the connecting holes 16 are fixed on both sides of the top surface of the support box 12. Elastic plugs 18 that abut against the top of the fastening box 5 are inserted at both ends of the connecting rod 15. A telescopic groove 17 is formed in the connecting rod 15 passing through the top of the fastening box 5. A spring 19 that abuts against the plug 18 is embedded in the telescopic groove 17. The connecting rods 15 at the top of the support box 12 are snugly inserted into the connecting holes 16 at both ends of the fastening box 5. During the insertion process, the inner wall of the connecting hole 16 squeezes the plug 18 to contract into the telescopic groove 17. After the connecting rod 15 passes through the fastening box 5, the spring 19 in the telescopic groove 17 pushes the plug 18 to protrude from the top of the fastening box 5 and is clamped with the top of the fastening box 5, so as to keep the fastening box 5 and the support box 12 fixed.

[0027] As Figure 2 and Figure 3As shown, convex portions 2 are fixedly arranged on both sides of the top end surface of the base 1. A test cross bar 13 is symmetrically installed between the two convex portions 2. The extrusion portion 6 deforms after extruding the concrete main body 14. The curvature of the concrete main body 14 is detected by the horizontally arranged test cross bar 13, and cracks on the surface of the concrete main body 14 are observed. Fastening portions 4 are fixedly arranged on both sides of the bottom end surface of the support box 12. The convex portion 2 is fitted and inserted between the two fastening portions 4. A bolt 3 that abuts against the convex portion 2 is threadedly inserted into the side wall of the fastening portion 4. After the bolt 3 is tightened, it extrudes the convex portion 2, so that the fastening portion 4 is fixed on the convex portion 2. A plurality of support rods 10 are fixedly arranged at the top end of the base 1 in a rectangular array. A positioning plate 9 is fixedly arranged at the top end of the support rod 10. The lifting plate 11 moves driven by the hydraulic rod 8. During the movement, the positioning rod 7 slides in the positioning plate 9, and the lifting plate 11 and the extrusion portion 6 are kept stable during the sliding process. A hydraulic rod 8 is fixedly installed at the top end of the positioning plate 9. A lifting plate 11 is fixedly installed at the top end of the extrusion portion 6. The bottom end of the hydraulic rod 8 is fixedly connected to the lifting plate 11. Positioning rods 7 that are slidably inserted into the positioning plate 9 are fixedly arranged on both sides of the top end surface of the lifting plate 11.

[0028] The structural schematic diagram of the support box 12 of the test device for detecting the early anti-cracking performance of concrete is as Figure 2 shown, and the structural schematic diagram of its fastening box 5 is as Figure 3 shown, and the cross-sectional structural schematic diagram of its support box 12 is as Figure 4 shown.

[0029] Working principle: When detecting the concrete main body 14, both ends of the concrete main body 14 are fitted and inserted into the support box 12, and the two fastening boxes 5 are sleeved on the top end of the support box 12. After installation, the connecting rod 15 at the top end of the support box 12 is fitted and inserted into the connection holes 16 at both ends of the fastening box 5. During the insertion process, the inner wall of the connection hole 16 squeezes the clamping block 18 to contract into the telescopic groove 17. After the connecting rod 15 passes through the fastening box 5, the spring 19 in the telescopic groove 17 pushes the clamping block 18 to protrude from the top end of the fastening box 5 and is clamped with the top end of the fastening box 5, so that the fastening box 5 and the support box 12 are kept fixed. After the test, the clamping block 18 is contracted into the telescopic groove 17 and then the fastening box 5 is disassembled, which is convenient for the installation and disassembly of the fastening box 5 and improves the convenience of replacing the concrete main body 14.

[0030] All technical features in this embodiment can be freely combined according to actual needs.

[0031] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An experimental device for detecting the early anti-cracking performance of concrete. The experimental device for detecting the early anti-cracking performance of concrete includes a base (1) and support boxes (12) fixed on both sides of the top surface of the base (1), and is characterized in that, The top end of the base (1) is provided with an extrusion part (6). The top ends of the two support boxes (12) are fixedly installed with fastening boxes (5) detachably, and the top ends of the two support boxes (12) are fixedly embedded with a concrete body (14). Connecting holes (16) are formed at both ends of the fastening box (5). Connecting rods (15) that are fixedly installed on both sides of the top end surface of the support box (12) and fit and plug into the connecting holes (16). Elastic plugs at both ends of the connecting rod (15) are provided with clamping blocks (18) that abut against the top end of the fastening box (5).

2. The test device for detecting the early anti-cracking performance of concrete according to claim 1, wherein Protrusion parts (2) are fixedly installed on both sides of the top end surface of the base (1). A test cross bar (13) is symmetrically installed between the two protrusion parts (2).

3. The test device for detecting the early anti-cracking performance of concrete according to claim 2, characterized in that, Fastening parts (4) are fixedly installed on both sides of the bottom end surface of the support box (12). The protrusion part (2) fits and plugs between the two fastening parts (4). A bolt (3) that abuts against the protrusion part (2) is threadedly plugged on the side wall of the fastening part (4).

4. The test device for detecting the early anti-cracking performance of concrete according to claim 1, wherein, A plurality of support rods (10) are fixedly installed in a rectangular array at the top end of the base (1). A positioning plate (9) is fixedly installed at the top end of the support rod (10).

5. The test device for detecting the early anti-cracking performance of concrete according to claim 4, characterized in that, A hydraulic rod (8) is fixedly installed at the top end of the positioning plate (9). A lifting plate (11) is fixedly installed at the top end of the extrusion part (6).

6. The test device for detecting the early anti-cracking performance of concrete according to claim 5, characterized in that, The bottom end of the hydraulic rod (8) is fixedly connected to the lifting plate (11). Positioning rods (7) that are slidably plugged into the positioning plate (9) are fixedly installed on both sides of the top end surface of the lifting plate (11).

7. The test device for detecting the early anti-cracking performance of concrete according to claim 1, characterized in that, A telescopic groove (17) is formed at the top end of the connecting rod (15) passing through the fastening box (5). A spring (19) that abuts against the clamping block (18) is embedded in the telescopic groove (17).

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