A concrete compressive and flexural strength testing machine

Abstract

This utility model discloses a concrete compressive and flexural strength testing machine, including a base, a support plate on the base, support blocks symmetrically arranged on the support plate, a clamping screw rotatably mounted on the support block, a clamping block at one end of the clamping screw, a support groove on the clamping block, a support frame on the base, a press mounted on the support frame, a mounting frame at the output end of the press, a test block mounted on the mounting frame, a pin between the test block and the mounting frame, a flexural indenter on one side of the test block, and a compressive indenter on the other side. The concrete test block is clamped by the clamping blocks for compressive strength testing, and placed in the support groove for flexural strength testing. The press on the support frame moves the test block to perform compressive and flexural strength tests on the concrete test block. The flexural and compressive indenters on the test block facilitate quick switching of the testing items of the machine.

Description

Technical Field

[0001] This utility model relates to the field of concrete testing technology, and more specifically, to a concrete compressive and flexural strength testing machine. Background Technology

[0002] With the continuous expansion of my country's infrastructure construction scale and the increasing requirements for building quality, the importance of concrete material performance testing equipment has become increasingly prominent. As a key piece of equipment for evaluating the mechanical properties of concrete, the concrete compressive and flexural strength testing machine directly affects the accuracy of engineering quality evaluation. However, existing testing machines still have many technical defects in practical applications, making it difficult to meet the needs of modern engineering testing.

[0003] With the rapid development of my country's construction industry, the demand for concrete quality testing is increasing. Currently, common concrete specimen mechanical property testing equipment on the market typically adopts a split design, with the compressive strength testing device and the flexural strength testing device located on the left and right sides of the equipment, respectively, and the control and display system arranged in the middle. This split structure results in the equipment typically occupying 4-6 square meters of space, which severely encroaches on the space available for other testing equipment in laboratories with limited space. Because the compressive and flexural strength testing devices are separate, operators need to move the specimens back and forth during different tests, increasing their workload. Furthermore, during the compressive and flexural strength testing of concrete specimens, flying concrete debris can easily injure the testing personnel. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the problems existing in the prior art, this utility model provides a concrete compressive and flexural strength testing machine to solve the technical problem mentioned in the background art that the split-type testing machine occupies a large area and increases the workload.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a concrete compressive and flexural strength testing machine, comprising a platform, a support plate on the platform, support blocks symmetrically arranged on the support plate, a clamping screw rotatably mounted on the support block, a clamping knob at one end of the clamping screw and a clamping block at the other end, a support groove on the clamping block, a pressing device at the top of the clamping block, a support frame on the platform, a press on the support frame, a mounting frame at the output end of the press, a testing block on the mounting frame, a pin between the testing block and the mounting frame, a flexural pressure head on one side of the testing block and a compressive pressure head on the other side, a limiting sleeve on the mounting frame, a limiting rod slidably mounted on the limiting sleeve, and a first limiting groove and a second limiting groove on the testing block.

[0008] The present invention is further configured such that a limiting slide rod is slidably provided on the limiting sleeve, and one end of the limiting slide rod is fixedly connected to the limiting rod, so as to facilitate the movement of the position of the limiting rod.

[0009] The present invention is further configured such that a limiting plate is provided on the limiting slide rod, and a limiting spring is provided between the limiting plate and the limiting sleeve, so that the limiting rod has a continuous and stable elastic force pointing towards the first limiting groove and the second limiting groove.

[0010] The present invention is further configured such that the clamping device includes a clamping frame, a clamping screw is threadedly connected to the clamping frame, and a clamping plate is provided at one end of the clamping screw, thereby improving the stability of the concrete test block.

[0011] The present invention is further configured such that the clamping frame is rotatably mounted on the top of the clamping block, which facilitates the placement of concrete test blocks between the clamping blocks and between the support groove.

[0012] The present invention is further provided that the platform is provided with a protective cover, and a protective plate is hinged to one end of the protective cover to prevent concrete debris from injuring the test personnel.

[0013] The present invention is further configured such that an electromagnet is provided on the protective plate and a permanent magnet is provided on the protective cover, which facilitates the closing and opening of the protective plate.

[0014] The present invention is further provided with an observation window on the protective plate to facilitate observation of the deformation state of the concrete test block on the pedestal.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a concrete compressive and flexural strength testing machine, which has the following beneficial effects:

[0017] 1. The clamping screw is rotated by the clamping knob to adjust the position of the clamping block. The clamping block is used to hold the concrete specimen for compressive strength testing. The concrete specimen is placed on the support groove for flexural strength testing. The clamping device is used to press the top of the concrete specimen to further stabilize the position of the concrete specimen during testing.

[0018] 2. The test block is moved by the press on the support frame to carry out compressive and flexural tests on the concrete test block. The test block is equipped with flexural and compressive indenters to facilitate quick switching of the test items of the testing machine. The combination of the limit rod, the first limit groove and the second limit groove facilitates the restriction of the rotation direction and position of the test block.

[0019] 3. By setting up protective covers and protective plates, the test area can be easily surrounded to prevent concrete splashing from causing injury to the test personnel. The combination of electromagnets and permanent magnets makes it easy to close the protective plates. By setting up observation windows, the state of the concrete can be easily observed. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a concrete compressive and flexural strength testing machine according to the present invention;

[0021] Figure 2 This is a schematic diagram of the cooperative structure of the support plate, clamping screw, clamping block and pressing device in this utility model;

[0022] Figure 3 This is a schematic diagram of the cooperative structure of the support frame, press, mounting frame and detection block in this utility model;

[0023] Figure 4 This is a schematic diagram of the mounting bracket and detection block in this utility model;

[0024] Figure 5 This is a schematic diagram of the cooperative structure of the limiting sleeve, limiting rod, limiting plate, limiting slide rod and limiting spring in this utility model.

[0025] In the diagram: 1. Base; 2. Support plate; 3. Support block; 4. Clamping screw; 5. Clamping knob; 6. Clamping block; 7. Support groove; 8. Support frame; 9. Press; 10. Mounting frame; 11. Detection block; 12. Pin; 13. Bending head; 14. Compression head; 15. Limiting sleeve; 16. Limiting rod; 17. First limiting groove; 18. Second limiting groove; 19. Limiting slide rod; 20. Limiting plate; 21. Limiting spring; 22. Pressing frame; 23. Pressing screw; 24. Pressing plate; 25. Protective cover; 26. Protective plate; 27. Electromagnet; 28. Permanent magnet; 29. ​​Observation window. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0029] Please see Figures 1-5 A concrete compressive and flexural strength testing machine includes a platform 1, a support plate 2 on the platform 1, support blocks 3 symmetrically arranged on the support plate 2, a clamping screw 4 rotatably mounted on the support block 3, a clamping knob 5 at one end of the clamping screw 4, and a clamping block 6 at the other end, a support groove 7 on the clamping block 6, and a pressing device on the top of the clamping block 6. A support frame 8 is mounted on the platform 1, and a press 9 is mounted on the support frame 8. A mounting frame 10 is mounted on the output end of the press 9, and a testing block 11 is mounted on the mounting frame 10. A pin 12 is provided between the testing block 11 and the mounting frame 10. A flexural pressure head 13 is provided on one side of the testing block 11, and a clamping device is provided on the other side. The device includes a pressure head 14, a mounting bracket 10 with a limiting sleeve 15, a limiting rod 16 slidably mounted on the limiting sleeve 15, a detection block 11 with a first limiting groove 17 and a second limiting groove 18, a limiting slide rod 19 slidably mounted on the limiting sleeve 15, one end of the limiting slide rod 19 being fixedly connected to the limiting rod 16, a limiting plate 20 mounted on the limiting slide rod 19, a limiting spring 21 between the limiting plate 20 and the limiting sleeve 15, and a clamping device including a clamping frame 22, a clamping screw 23 threadedly connected to the clamping frame 22, a clamping plate 24 mounted at one end of the clamping screw 23, and the clamping frame 22 being rotatably mounted on the top of the clamping block 6.

[0030] In this embodiment, when performing compressive strength testing on concrete, the concrete test block is placed on the support plate 2. The clamping knob 5 drives the clamping screw 4 to rotate, adjusting the position of the clamping block 6, which clamps the concrete test block. The clamping screw 23 is rotated, causing the clamping plate 24 to move downwards to compress and limit the concrete test block. The press 9 drives the test block 11 downwards, and the compressive strength of the concrete is tested through the compressive strength indenter 14. When performing flexural strength testing, the concrete test block is placed on the support groove 7, and then the test block is pressed... The tightening screw 23 drives the clamping plate 24 to press the concrete test block, pulls the limiting slide bar 19 outward, and the limiting slide bar 19 drives the limiting plate 20 to compress the limiting spring 21, so that the limiting rod 16 leaves the first limiting groove 17. The test block 11 is rotated so that the bending pressure head 13 is downward, and the limiting slide bar 19 is released. Under the elastic force of the limiting spring 21, the limiting plate 20 drives the limiting rod 16 to insert into the second limiting groove 18, thereby limiting the position of the test block 11. The press 9 drives the test block 11 to move and perform the bending test on the concrete test block.

[0031] Please see Figure 1 As one method of protecting the testing machine: a protective cover 25 is provided on the base 1, a protective plate 26 is hinged to one end of the protective cover 25, an electromagnet 27 is provided on the protective plate 26, a permanent magnet 28 is provided on the protective cover 25, and an observation window 29 is provided on the protective plate 26.

[0032] More specifically, during the test, the protective plate 26 is lifted upwards, and the electromagnet 27 is energized to generate a magnetic attraction force that works with the permanent magnet 28, so that the protective plate 26 and the protective cover 25 are combined to cover the test area, preventing debris from injuring the test personnel when the concrete deforms. At the same time, the deformation of the concrete can be easily observed through the observation window 29.

[0033] In summary, during the use or operation of the overall equipment: when conducting compressive strength testing on concrete, the concrete test block is placed on the support plate 2. The clamping knob 5 drives the clamping screw 4 to rotate, adjusting the position of the clamping block 6, which clamps the concrete test block. The clamping screw 23 is rotated, causing the clamping plate 24 to move downwards to compress and limit the concrete test block. The press 9 drives the test block 11 downwards, and the compressive strength of the concrete is tested through the compressive strength indenter 14. When conducting flexural strength testing, the concrete test block is placed on the support groove 7. Subsequently, the clamping screw 23 drives the clamping plate 24 to clamp the concrete test block, and the limiting slide rod 19 is pulled outward. The limiting slide rod 19 drives the limiting plate 20 to compress the limiting spring 21, so that the limiting rod 16 leaves the first limiting groove 17. The test block 11 is rotated so that the bending pressure head 13 is downward, and the limiting slide rod 19 is released. Under the elastic force of the limiting spring 21, the limiting plate 20 drives the limiting rod 16 to insert into the second limiting groove 18, thereby limiting the position of the test block 11. The press 9 drives the test block 11 to move and perform the bending test on the concrete test block.

[0034] During the test, the protective plate 26 is lifted upwards, and the electromagnet 27 is energized to generate a magnetic attraction force that works with the permanent magnet 28, so that the protective plate 26 and the protective cover 25 are combined to cover the test area, preventing debris from injuring the test personnel when the concrete deforms. At the same time, the deformation of the concrete can be easily observed through the observation window 29.

[0035] All other parts of this utility model that are not described in detail belong to the prior art, and therefore will not be described in detail here.

[0036] In all the solutions mentioned above, the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

[0037] In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise specified, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their electrical connection relationships and specific circuit structures will not be elaborated here.

[0038] Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies, and this utility model will not elaborate on them.

Claims

1. A concrete compression and flexure testing machine comprising a base (1) characterised in that: The platform (1) is provided with a support plate (2), and the support plate (2) is symmetrically provided with support blocks (3). The support blocks (3) are rotatably provided with clamping screws (4). One end of the clamping screws (4) is provided with a clamping knob (5), and the other end is provided with a clamping block (6). The clamping block (6) is provided with a support groove (7), and the top of the clamping block (6) is provided with a pressing device. The platform (1) is provided with a support frame (8), and the support frame (8) is provided with a press (9). The press (9) outputs... The outlet is provided with a mounting bracket (10), the mounting bracket (10) is provided with a detection block (11), the detection block (11) and the mounting bracket (10) are provided with a pin (12), one side of the detection block (11) is provided with an anti-bending pressure head (13), the other side is provided with an anti-compression pressure head (14), the mounting bracket (10) is provided with a limiting sleeve (15), the limiting sleeve (15) is slidably provided with a limiting rod (16), and the detection block (11) is provided with a first limiting groove (17) and a second limiting groove (18).

2. The concrete compression and flexure testing machine of claim 1, wherein: The limiting sleeve (15) is slidably provided with a limiting slide rod (19), and one end of the limiting slide rod (19) is fixedly connected to the limiting rod (16).

3. The concrete compression and flexure testing machine of claim 2, wherein: The limiting slide bar (19) is provided with a limiting plate (20), and a limiting spring (21) is provided between the limiting plate (20) and the limiting sleeve (15).

4. The concrete compression and flexure testing machine of claim 1 wherein: The clamping device includes a clamping frame (22), on which a clamping screw (23) is threadedly connected, and a clamping plate (24) is provided at one end of the clamping screw (23).

5. The concrete compression and flexure testing machine of claim 4 wherein: The clamping frame (22) is rotatably mounted on top of the clamping block (6).

6. The concrete compression and flexure testing machine of claim 1 wherein: The pedestal (1) is provided with a protective cover (25), and a protective plate (26) is hinged to one end of the protective cover (25).

7. The concrete compression and flexure testing machine of claim 6 wherein: The protective plate (26) is equipped with an electromagnet (27), and the protective cover (25) is equipped with a permanent magnet (28).

8. The concrete compression and flexure testing machine of claim 6, wherein: The protective plate (26) is provided with an observation window (29).

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