Concrete core sample bending test device and method

Abstract

The invention provides a concrete core sample anti-bending test device and method, and relates to the technical field of concrete core sample anti-bending tests, the concrete core sample anti-bending test device comprises a test rack, an anti-bending test mechanism, a support mechanism and an anti-splashing mechanism; the anti-bending test mechanism is mounted on the test rack; the supporting mechanism is mounted on the test rack, the supporting mechanism is located under the anti-bending test mechanism, and a concrete core sample is placed at the top of the supporting mechanism; an anti-splashing mechanism is mounted on the test rack; qualification marks on the two marking sponges automatically make contact with the concrete core sample, automatic marking of the tested concrete core sample is achieved, and the tested concrete core sample is prevented from being mixed with an untested concrete core sample; the problem that the tested concrete core sample and the untested concrete core sample are easily mixed together due to the fact that the tested concrete core sample cannot be automatically marked generally is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of flexural strength tests for concrete core samples, and more specifically, particularly relates to a device and method for flexural strength tests of concrete core samples. Background Art

[0002] A concrete core sample refers to a cylindrical concrete specimen taken from a hardened concrete structure by the core drilling method; the taken concrete core sample usually needs to be subjected to a flexural strength test, and the flexural strength test can reflect the uniformity and compactness inside the concrete. If there are defects such as cracks, cavities or delaminations in the concrete, its flexural strength will be significantly reduced, thereby providing a basis for quality assessment.

[0003] The currently used devices for flexural strength tests of concrete core samples still have the following problems:

[0004] 1. Generally, it cannot automatically mark the concrete core samples after the test, resulting in the easy mixing of the tested concrete core samples with the untested ones;

[0005] 2. Although some devices for flexural strength tests of concrete core samples are equipped with anti - splashing structures, the anti - splashing structures are prone to not being used, resulting in the broken concrete core samples being likely to accidentally injure the staff. Summary of the Invention

[0006] Embodiments of the present disclosure relate to a device and method for flexural strength tests of concrete core samples, which have a flexural strength test mechanism, a support mechanism and an anti - splashing mechanism; the qualified marks on the two marking sponges automatically come into contact with the concrete core samples, realizing the automatic marking of the tested concrete core samples and avoiding the mixing of the tested concrete core samples with the untested ones; ensuring that when testing the concrete core samples, the anti - splashing frame and the anti - splashing metal mesh must be in a vertical state, improving the protection effect; solving the problems that the tested concrete core samples are easy to be mixed with the untested ones and the anti - splashing structure is prone to not being used.

[0007] In the first aspect of the present disclosure, a device for flexural strength tests of concrete core samples is provided for testing the flexural strength of concrete core samples; it includes: a test machine frame, a flexural strength test mechanism, a support mechanism and an anti - splashing mechanism;

[0008] Mounting holes are provided at the corners of the test machine frame; the flexural strength test mechanism is installed on the test machine frame, and the flexural strength test mechanism is used to press the concrete core samples; the support mechanism is installed on the test machine frame, and the support mechanism is located directly below the flexural strength test mechanism, and a concrete core sample is placed on the top of the support mechanism;

[0009] The support mechanism is used to position the concrete core samples to be tested, and the support mechanism is also used to automatically mark the concrete core samples after testing; an anti-spattering mechanism is installed on the test rack, and the anti-spattering mechanism is used to protect the staff.

[0010] In at least some embodiments, the flexural test mechanism includes: an electric telescopic rod and a connecting flat plate; there are two electric telescopic rods in total, and the two electric telescopic rods are fixedly installed on the test rack; the connecting flat plate is fixedly installed on the output shafts of the two electric telescopic rods.

[0011] In at least some embodiments, the flexural test mechanism further includes: an octagonal movable shaft and a flexural test rod; the octagonal movable shaft is slidably installed on the connecting flat plate; the flexural test rod is fixedly installed at the bottom of the octagonal movable shaft, and the front and rear ends of the flexural test rod are provided with rounded corners.

[0012] In at least some embodiments, the flexural test mechanism further includes: an octagonal ring and a helical spring A; the octagonal ring is fixedly installed at the top of the octagonal movable shaft, and the bottom of the octagonal ring contacts the connecting flat plate; the helical spring A is sleeved outside the octagonal movable shaft, and the helical spring A is located between the connecting flat plate and the flexural test rod.

[0013] In at least some embodiments, the support mechanism includes: support limit seats, movable positioning frames and return tension springs; there are two support limit seats in total, and the two support limit seats are installed on the test rack by screws; there are two movable positioning frames in total, and the two movable positioning frames are slidably installed on the two support limit seats; there are two return tension springs in total, and the two return tension springs are fixedly installed inside the two movable positioning frames.

[0014] In at least some embodiments, the support mechanism further includes: marking sponges and a liquid storage shell; there are two marking sponges in total, and the two marking sponges are slidably installed inside the two support limit seats; the liquid storage shell is fixedly installed at the rear sides of the two support limit seats, and a filling opening is formed at the top of the liquid storage shell, and the liquid in the liquid storage shell is communicated with the two marking sponges.

[0015] In at least some embodiments, the anti-spattering mechanism includes: triangular mounting blocks, circular rotating shafts, anti-spattering frames and anti-spattering metal meshes; there are two triangular mounting blocks in total, and the two triangular mounting blocks are fixedly installed on the test rack; the circular rotating shafts are rotatably installed on the two triangular mounting blocks; the anti-spattering frames are fixedly installed outside the circular rotating shafts; the anti-spattering metal meshes are fixedly installed on the anti-spattering frames.

[0016] In at least some embodiments, the anti-splash mechanism further includes: a rectangular storage cover, a circular reset rod, and a rectangular mounting block; the rectangular storage cover is fixedly installed at the bottom of the anti-splash frame; the circular reset rod is slidably installed on the anti-splash frame; the rectangular mounting block is slidably installed inside the rectangular storage cover, the top of the rectangular mounting block is fixedly connected to the circular reset rod, and chamfers are provided at the corners of the rectangular mounting block.

[0017] In at least some embodiments, the anti-splash mechanism further includes: a reset ring, a helical spring B, and a control button; the reset ring is fixedly installed outside the circular reset rod; the helical spring B is sleeved outside the circular reset rod, and the helical spring B is located between the anti-splash frame and the reset ring; there are two control buttons in total, and the two control buttons are fixedly installed inside the rectangular mounting block, and the two control buttons are also electrically connected to the electric telescopic rod.

[0018] A method for flexural test of concrete core samples:

[0019] 1), Fix the test machine frame through bolts, and then appropriately adjust the extended lengths of the two electric telescopic rods according to the test requirements;

[0020] 2), Place the concrete core sample to be tested between the two movable positioning frames, and then press down the concrete core sample so that the bottom of the concrete core sample contacts the two support limit seats;

[0021] 3), Rotate the anti-splash frame by ninety degrees so that the anti-splash frame rotates to a vertical state, and control the expansion and contraction of the output shafts of the two electric telescopic rods through the two control buttons.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. When the output shafts of the two electric telescopic rods extend, the flexural test rod automatically moves downward; when the output shafts of the two electric telescopic rods contract, the flexural test rod automatically moves upward, realizing the automatic test of the concrete core sample; when the output shafts of the two electric telescopic rods are all extended and the concrete core sample does not break, it indicates that the flexural performance of the concrete core sample meets the test requirements; when the output shafts of the two electric telescopic rods are all extended and the concrete core sample breaks, it indicates that the flexural performance of the concrete core sample does not meet the test requirements.

[0024] Among them, when the flexural test requirements of the concrete core sample change, the staff appropriately adjusts the extended lengths of the output shafts of the two electric telescopic rods; when the flexural test requirements of the concrete core sample increase, the extended lengths of the output shafts of the two electric telescopic rods are increased; when the flexural test requirements of the concrete core sample decrease, the extended lengths of the output shafts of the two electric telescopic rods are decreased.

[0025] 2. The provision of two movable positioning frames in the present invention positions the concrete core sample, aligning the center of the concrete core sample substantially with the center of the test machine frame. When the staff places the concrete core sample on the tops of the two support and limit seats, the qualified markings on the two marking sponges automatically come into contact with the concrete core sample, achieving automatic marking of the concrete core sample after testing and preventing the mixed-up of tested and untested concrete core samples.

[0026] In addition, the provision of the liquid storage housing and the filling opening facilitates the staff to fill in the colored marking liquid, keeping the liquid levels in the liquid storage housing and the two marking sponges always the same, and increasing the usage times of the two marking sponges.

[0027] 3. The provision of the anti-splash border and the anti-splash metal mesh in the present invention protects against the broken concrete core sample from accidentally injuring the staff. When the staff flips the anti-splash border by 90 degrees, the test machine frame pushes the circular reset rod forward, moving the rectangular mounting block out of the rectangular storage cover, facilitating the staff to press the corresponding control buttons. When the staff opens the anti-splash border, the rectangular mounting block automatically resets to the rectangular storage cover under the action of the two spiral springs B, ensuring that the anti-splash border and the anti-splash metal mesh must be in a vertical state during the testing of the concrete core sample, thus enhancing the protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly introduced below.

[0029] The accompanying drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0030] In the accompanying drawings:

[0031] Figure 1 shows the three-dimensional structural schematic diagram of the present invention;

[0032] Figure 2 shows the present invention Figure 1 in the front view perspective structural schematic diagram;

[0033] Figure 3 shows the structural schematic diagram of the flexural test mechanism of the present invention;

[0034] Figure 4 shows the present invention Figure 1 in the rear view perspective structural schematic diagram;

[0035] Figure 5 shows the structural schematic diagram of the support mechanism of the present invention;

[0036] Figure 6Shows a longitudinal sectional structural schematic diagram of the support mechanism of the present invention;

[0037] Figure 7 Shows the present invention Figure 1 Bottom perspective structural schematic diagram;

[0038] Figure 8 Shows a structural schematic diagram of the anti-splash mechanism of the present invention;

[0039] Figure 9 Shows the present invention Figure 8 Partial enlarged structural schematic diagram of area A in;

[0040] List of reference numerals:

[0041] 100, test frame;

[0042] 200, flexural test mechanism; 201, electric telescopic rod; 202, connecting flat plate; 203, octagonal movable shaft; 204, flexural test rod; 205, octagonal ring; 206, helical spring A;

[0043] 300, support mechanism; 301, support limit seat; 302, movable positioning frame; 303, return tension spring; 304, marking sponge; 305, liquid storage housing; 3051, filling opening;

[0044] 400, concrete core sample;

[0045] 500, anti-splash mechanism; 501, triangular mounting block; 502, circular rotating shaft; 503, anti-splash frame; 504, anti-splash metal mesh; 505, rectangular storage cover; 506, circular return rod; 507, rectangular mounting block; 508, return ring; 509, helical spring B; 510, control button. Detailed implementation manners

[0046] In order to make the objectives, solutions and advantages of the technical solutions of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the specific embodiments of the present invention. Unless otherwise specified, the terms used herein have the ordinary meanings in the art. The same reference numerals in the drawings represent the same components.

[0047] Embodiment: Please refer to Figures 1 to 9As shown in the figure: The present invention provides a flexural test device for concrete core samples, which is used to test the flexural performance of concrete core samples 400; it includes: a test frame 100, a flexural test mechanism 200, a support mechanism 300 and a splash-proof mechanism 500; mounting holes are provided at the corners of the test frame 100; the flexural test mechanism 200 is installed on the test frame 100, and the flexural test mechanism 200 is used to press the concrete core sample 400; the support mechanism 300 is installed on the test frame 100, and the support mechanism 300 is located directly below the flexural test mechanism 200, and a concrete core sample 400 is placed on the top of the support mechanism 300; the support mechanism 300 is used to position the concrete core sample 400 to be tested, and the support mechanism 300 is also used to automatically mark the concrete core sample 400 after the test; a splash-proof mechanism 500 is installed on the test frame 100, and the splash-proof mechanism 500 is used to protect the staff.

[0048] In the embodiments of the present disclosure, as Figure 2 and Figure 3 shown, the flexural test mechanism 200 includes: an electric telescopic rod 201 and a connecting flat plate 202; there are two electric telescopic rods 201 in total, and the two electric telescopic rods 201 are fixedly installed on the test frame 100; the connecting flat plate 202 is fixedly installed on the output shafts of the two electric telescopic rods 201; the flexural test mechanism 200 further includes: an octagonal movable shaft 203 and a flexural test rod 204; the octagonal movable shaft 203 is slidably installed on the connecting flat plate 202; the flexural test rod 204 is fixedly installed at the bottom of the octagonal movable shaft 203, and the front and rear ends of the flexural test rod 204 are provided with rounded corners; the flexural test mechanism 200 further includes: an octagonal ring 205 and a spiral spring A206; the octagonal ring 205 is fixedly installed at the top of the octagonal movable shaft 203, and the bottom of the octagonal ring 205 is in contact with the connecting flat plate 202; the spiral spring A206 is sleeved outside the octagonal movable shaft 203, and the spiral spring A206 is located between the connecting flat plate 202 and the flexural test rod 204;

[0049] Its specific function is as follows: Since the connecting plate 202 is fixedly installed on the output shafts of the two electric telescopic rods 201, and the octagonal movable shaft 203 is slidably installed on the connecting plate 202, and the flexural test rod 204 is fixedly installed at the bottom of the octagonal movable shaft 203, when the output shafts of the two electric telescopic rods 201 extend, the flexural test rod 204 automatically moves downward; when the output shafts of the two electric telescopic rods 201 contract, the flexural test rod 204 automatically moves upward, realizing the automatic testing of the concrete core sample 400; Also, since the helical spring A 206 is sleeved outside the octagonal movable shaft 203, and the helical spring A 206 is located between the connecting plate 202 and the flexural test rod 204, when the output shafts of the two electric telescopic rods 201 are fully extended and the concrete core sample 400 does not break, it indicates that the flexural performance of the concrete core sample 400 meets the test requirements; when the output shafts of the two electric telescopic rods 201 are fully extended and the concrete core sample 400 breaks, it indicates that the flexural performance of the concrete core sample 400 does not meet the test requirements;

[0050] Among them, when the flexural test requirements of the concrete core sample 400 change, the staff appropriately adjusts the extension length of the output shafts of the two electric telescopic rods 201; when the flexural test requirements of the concrete core sample 400 increase, the extension length of the output shafts of the two electric telescopic rods 201 is increased; when the flexural test requirements of the concrete core sample 400 decrease, the extension length of the output shafts of the two electric telescopic rods 201 is decreased.

[0051] In the embodiment of the present disclosure, as Figure 5 and Figure 6 shown, the support mechanism 300 includes: a support limit seat 301, a movable positioning frame 302 and a return spring 303; there are two support limit seats 301 in total, and the two support limit seats 301 are installed on the test rack 100 by screws; there are two movable positioning frames 302 in total, and the two movable positioning frames 302 are slidably installed on the two support limit seats 301; there are two return springs 303 in total, and the two return springs 303 are fixedly installed inside the two movable positioning frames 302; the support mechanism 300 further includes: a marking sponge 304 and a liquid storage housing 305; there are two marking sponges 304 in total, and the two marking sponges 304 are slidably installed inside the two support limit seats 301; the liquid storage housing 305 is fixedly installed at the rear of the two support limit seats 301, and a filling opening 3051 is provided at the top of the liquid storage housing 305, and the liquid in the liquid storage housing 305 is communicated with the two marking sponges 304;

[0052] Its specific functions are as follows: Since the two movable positioning frames 302 are slidably installed on the two support limiting seats 301, and the two reset tension springs 303 are fixedly installed inside the two movable positioning frames 302, they play a positioning role for the concrete core sample 400, making the center of the concrete core sample 400 basically aligned with the center of the test machine frame 100; also, since the two marking sponges 304 are slidably installed inside the two support limiting seats 301, and there are qualified marks on the two marking sponges 304, when the staff places the concrete core sample 400 on the tops of the two support limiting seats 301, the qualified marks on the two marking sponges 304 automatically come into contact with the concrete core sample 400, realizing the automatic marking of the concrete core sample 400 after testing and avoiding the mixing of the tested concrete core sample 400 with the untested concrete core sample 400;

[0053] In addition, since the liquid storage housing 305 is fixedly installed at the rear sides of the two support limiting seats 301, and a filling opening 3051 is provided at the top of the liquid storage housing 305, and the liquid in the liquid storage housing 305 is communicated with the two marking sponges 304, it is convenient for the staff to fill in the colored marking liquid, so that the liquid levels of the liquid in the liquid storage housing 305 and the liquid in the two marking sponges 304 are always the same, improving the usage times of the two marking sponges 304.

[0054] In the embodiment of the present disclosure, such as Figure 8 and Figure 9As shown in the figure, the anti-splash mechanism 500 includes: a triangular mounting block 501, a circular rotating shaft 502, an anti-splash frame 503, and an anti-splash metal mesh 504; there are two triangular mounting blocks 501 in total, and the two triangular mounting blocks 501 are fixedly installed on the test rack 100; the circular rotating shaft 502 is rotatably installed on the two triangular mounting blocks 501; the anti-splash frame 503 is fixedly installed outside the circular rotating shaft 502; the anti-splash metal mesh 504 is fixedly installed on the anti-splash frame 503; the anti-splash mechanism 500 further includes: a rectangular storage cover 505, a circular reset rod 506, and a rectangular mounting block 507; the rectangular storage cover 505 is fixedly installed at the bottom of the anti-splash frame 503; the circular reset rod 506 is slidably installed on the anti-splash frame 503; the rectangular mounting block 507 is slidably installed inside the rectangular storage cover 505, and the top of the rectangular mounting block 507 is fixedly connected to the circular reset rod 506, and chamfers are provided at the corners of the rectangular mounting block 507; the anti-splash mechanism 500 further includes: a reset ring 508, a spiral spring B509, and a control button 510; the reset ring 508 is fixedly installed outside the circular reset rod 506; the spiral spring B509 is sleeved outside the circular reset rod 506, and the spiral spring B509 is located between the anti-splash frame 503 and the reset ring 508; there are two control buttons 510 in total, and the two control buttons 510 are fixedly installed inside the rectangular mounting block 507, and the two control buttons 510 are also electrically connected to the electric telescopic rod 201;

[0055] Its specific function is as follows: Since the circular rotating shaft 502 is rotatably installed on the two triangular mounting blocks 501, the anti-splash frame 503 is fixedly installed outside the circular rotating shaft 502, and the anti-splash metal mesh 504 is fixedly installed on the anti-splash frame 503, it plays a protective role for the fractured concrete core sample 400, avoiding the fractured concrete core sample 400 from accidentally injuring the staff; Also, because the rectangular storage cover 505 is fixedly installed at the bottom of the anti-splash frame 503, the rectangular mounting block 507 is slidably installed inside the rectangular storage cover 505, and the top of the rectangular mounting block 507 is fixedly connected to the circular reset rod 506, when the staff flips the anti-splash frame 503 by ninety degrees, the test rack 100 pushes the circular reset rod 506 forward, so that the rectangular mounting block 507 moves out of the rectangular storage cover 505, facilitating the staff to press the corresponding control button 510; When the staff opens the anti-splash frame 503, the rectangular mounting block 507 automatically resets to the rectangular storage cover 505 under the action of the two spiral springs B509, ensuring that when testing the concrete core sample 400, the anti-splash frame 503 and the anti-splash metal mesh 504 must be in a vertical state, improving the protection effect.

[0056] A method for testing the flexural strength of a concrete core sample:

[0057] 1), Fix the test rack 100 with bolts, and then appropriately adjust the extension lengths of the two electric telescopic rods 201 according to the test requirements;

[0058] 2), Place the concrete core sample 400 to be tested between the two movable positioning frames 302, and then press down on the concrete core sample 400 so that the bottom of the concrete core sample 400 contacts the two support limit seats 301;

[0059] 3), Rotate the anti-splash frame 503 by ninety degrees so that the anti-splash frame 503 rotates to a vertical state, and control the telescoping of the output shafts of the two electric telescopic rods 201 through the two control buttons 510.

[0060] The specific usage method and function of this embodiment:

[0061] When the present invention is in use, first, the test rack 100 is fixed by bolts, and then the extended lengths of the two electric telescopic rods 201 are adjusted appropriately according to the test requirements; when the flexural test requirements for the concrete core sample 400 increase, the extended lengths of the output shafts of the two electric telescopic rods 201 are increased; when the flexural test requirements for the concrete core sample 400 decrease, the extended lengths of the output shafts of the two electric telescopic rods 201 are decreased; the concrete core sample 400 to be tested is placed between the two movable positioning frames 302, and then the concrete core sample 400 is pressed downwards so that the bottom of the concrete core sample 400 contacts the two support limiting seats 301, which plays a positioning role for the concrete core sample 400 and makes the center of the concrete core sample 400 basically aligned with the center of the test rack 100; when the staff places the concrete core sample 400 on the tops of the two support limiting seats 301, the qualified markings on the two marking sponges 304 automatically contact the concrete core sample 400, realizing the automatic marking of the concrete core sample 400 after the test and avoiding the mixing of the tested concrete core sample 400 with the untested concrete core sample 400; the anti-spray border 503 is rotated by ninety degrees to make the anti-spray border 503 rotate to the vertical state, which plays a protective role for the fractured concrete core sample 400 and avoids the fractured concrete core sample 400 from accidentally injuring the staff, and the expansion and contraction of the output shafts of the two electric telescopic rods 201 are controlled by the two control buttons 510; when the output shafts of the two electric telescopic rods 201 extend, the flexural test rod 204 automatically moves downwards; when the output shafts of the two electric telescopic rods 201 contract, the flexural test rod 204 automatically moves upwards, realizing the automatic test of the concrete core sample 400; when the output shafts of the two electric telescopic rods 201 are all extended and the concrete core sample 400 does not break, it indicates that the flexural performance of the concrete core sample 400 meets the test requirements; when the output shafts of the two electric telescopic rods 201 are all extended and the concrete core sample 400 breaks, it indicates that the flexural performance of the concrete core sample 400 does not meet the test requirements; when the staff opens the anti-spray border 503, the rectangular mounting block 507 automatically resets to the rectangular storage cover 505 under the action of the two spiral springs B509, ensuring that when the concrete core sample 400 is tested, the anti-spray border 503 and the anti-spray metal net 504 must be in the vertical state, improving the protection effect.

[0062] In this article, the following points need to be noted:

[0063] 1. The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can refer to the general design.

[0064] 2. Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0065] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A flexural strength test device for concrete core samples, which is used to test the flexural strength of concrete core samples (400); comprising: A test rack (100), a flexural test mechanism (200), a support mechanism (300) and a splash-proof mechanism (500); Mounting holes are provided at the corners of the test rack (100); characterized in that, the flexural test mechanism (200) is mounted on the test rack (100), and the flexural test mechanism (200) is used to press the concrete core sample (400); the support mechanism (300) is mounted on the test rack (100), and the support mechanism (300) is located directly below the flexural test mechanism (200), and the concrete core sample (400) is placed on the top of the support mechanism (300); The support mechanism (300) is used to position the concrete core sample (400) to be tested, and the support mechanism (300) is also used to automatically mark the concrete core sample (400) after the test; a splash-proof mechanism (500) is mounted on the test rack (100), and the splash-proof mechanism (500) is used to protect the staff.

2. The flexural strength test device for concrete core samples according to claim 1, characterized in that, The flexural test mechanism (200) includes: an electric telescopic rod (201) and a connecting flat plate (202); there are two electric telescopic rods (201) in total, and the two electric telescopic rods (201) are fixedly mounted on the test rack (100); the connecting flat plate (202) is fixedly mounted on the output shafts of the two electric telescopic rods (201).

3. The flexural strength test device for concrete core samples according to claim 2, characterized in that, The flexural test mechanism (200) further includes: an octagonal movable shaft (203) and a flexural test rod (204); the octagonal movable shaft (203) is slidably mounted on the connecting flat plate (202); the flexural test rod (204) is fixedly mounted at the bottom of the octagonal movable shaft (203), and the front and rear ends of the flexural test rod (204) are provided with rounded corners.

4. The flexural strength test device for concrete core samples according to claim 3, wherein, The flexural test mechanism (200) further includes: an octagonal ring (205) and a spiral spring A (206); the octagonal ring (205) is fixedly mounted at the top end of the octagonal movable shaft (203), and the bottom of the octagonal ring (205) is in contact with the connecting flat plate (202); the spiral spring A (206) is sleeved outside the octagonal movable shaft (203), and the spiral spring A (206) is located between the connecting flat plate (202) and the flexural test rod (204).

5. A flexural strength test device for concrete core samples according to claim 1, characterized in that, The support mechanism (300) includes: a support limit seat (301), a movable positioning frame (302) and a reset tension spring (303); there are two support limit seats (301) in total, and the two support limit seats (301) are mounted on the test rack (100) by screws; there are two movable positioning frames (302) in total, and the two movable positioning frames (302) are slidably mounted on the two support limit seats (301); there are two reset tension springs (303) in total, and the two reset tension springs (303) are fixedly mounted on the inner sides of the two movable positioning frames (302).

6. The flexural strength test device for concrete core samples according to claim 5, characterized in that, The support mechanism (300) further includes: a marking sponge (304) and a liquid storage housing (305); there are two marking sponges (304) in total, and the two marking sponges (304) are slidably installed inside the two support limit seats (301); the liquid storage housing (305) is fixedly installed at the rear side of the two support limit seats (301), and a filling opening (3051) is formed at the top of the liquid storage housing (305), and the liquid in the liquid storage housing (305) is communicated with the two marking sponges (304).

7. A flexural strength test device for concrete core samples according to claim 5, characterized in that, The anti-splash mechanism (500) includes: a triangular mounting block (501), a circular rotating shaft (502), an anti-splash frame (503) and an anti-splash metal mesh (504); there are two triangular mounting blocks (501) in total, and the two triangular mounting blocks (501) are fixedly installed on the test rack (100); the circular rotating shaft (502) is rotatably installed on the two triangular mounting blocks (501); the anti-splash frame (503) is fixedly installed outside the circular rotating shaft (502); the anti-splash metal mesh (504) is fixedly installed on the anti-splash frame (503).

8. A flexural strength test device for concrete core samples according to claim 7, characterized in that, The anti-splash mechanism (500) further includes: a rectangular storage cover (505), a circular return rod (506) and a rectangular mounting block (507); the rectangular storage cover (505) is fixedly installed at the bottom of the anti-splash frame (503); the circular return rod (506) is slidably installed on the anti-splash frame (503); the rectangular mounting block (507) is slidably installed inside the rectangular storage cover (505), and the top of the rectangular mounting block (507) is fixedly connected to the circular return rod (506), and chamfers are provided at the corners of the rectangular mounting block (507).

9. The flexural strength test device for concrete core samples according to claim 8, characterized in that, The anti-splash mechanism (500) further includes: a return ring (508), a helical spring B (509) and a control button (510); the return ring (508) is fixedly installed outside the circular return rod (506); the helical spring B (509) is sleeved outside the circular return rod (506), and the helical spring B (509) is located between the anti-splash frame (503) and the return ring (508); there are two control buttons (510) in total, and the two control buttons (510) are fixedly installed inside the rectangular mounting block (507), and the two control buttons (510) are also electrically connected to the electric telescopic rod (201).

10. A method for flexural strength test of concrete core samples, characterized in that, When using a concrete core flexural test device as described in claim 9, the steps are as follows: 1). Fix the test rack (100) through bolts, and then appropriately adjust the extension lengths of the two electric telescopic rods (201) according to the test requirements; 2). Place the concrete core sample (400) to be tested between the two movable positioning frames (302), and then press down the concrete core sample (400) so that the bottom of the concrete core sample (400) contacts the two support limit seats (301); 3), Rotate the anti-splash frame (503) by ninety degrees so that the anti-splash frame (503) rotates to a vertical state, and control the telescoping of the output shafts of the two electric telescopic rods (201) through the two control buttons (510).

Images