Device for detecting compressive strength of concrete

Abstract

The concrete compressive strength detection device comprises a workbench, a sample fixing sleeve, a hydraulic rod and a pressing plate, supporting legs are arranged on the lower portion of the workbench, the hydraulic rod is installed in the middle of the workbench, the telescopic end of the hydraulic rod faces upwards, a pressure sensor is arranged at the upper end of the telescopic end of the hydraulic rod, and the pressing plate is installed on the upper portion of the pressure sensor; adjusting grooves are formed in the two sides of the workbench, and the lower portions of the sample fixing sleeves are installed in the adjusting grooves respectively. And the pressing plate is perpendicular to the axial direction of the sample fixing sleeve. The lower part of the sample fixing sleeve is fixed in the adjusting groove, the stability of the sample fixing sleeve can be ensured through acting force provided by the adjusting groove so as to offset huge acting force generated during detection, and meanwhile, thrust is applied to the sample through the pressing plate, so that the problem of interference between the pressure sensor and the sample fixing sleeve is solved; and the sample fixing sleeve can be closer, so that a sample with a shorter length can be detected, and the detection range of the equipment is expanded.

Description

Technical Field

[0001] The present application relates to the technical field of engineering quality detection, and in particular to a device for detecting the compressive strength of concrete. Background Art

[0002] At present, when testing the compressive strength of concrete, the concrete test blocks after homo-curing and standard curing can be placed on a hydraulic press for compression testing. However, this method does not directly measure the main body of the building. For this reason, people can also drill samples from the structure of the building through the core drilling method and then perform compression testing on the samples. However, the diameter of the samples drilled by the core drilling method is large, which causes certain damage to the building structure. Therefore, a method and device for testing the compressive strength of concrete by the flexural method is proposed, such as the Chinese patent No. 201110282390.2, which takes samples through a small diameter core drilling and then performs a flexural test on the samples. The test results, combined with values ​​such as the diameter of the sample, are used to calculate the compressive capacity of the building structure, which can reduce damage to the building structure. For example, Chinese patent application number 201310303529.6 discloses an intelligent concrete compressive strength tester and a test method thereof. The tester includes a base, two support columns, a pressure sensor, a data processing mechanism, and a loading mechanism. The support columns are arranged alternately and are provided with a specimen clamp; the pressure sensor is located in the middle of the two support columns, and its upper end is covered with a horizontally placed connecting plate, on which a pressure support bar is protruding, and the pressure support bar is placed in the middle of the two specimen clamps. The device obtains the sample's flexural strength by applying a lateral force to the sample. However, the device mainly connects the specimen clamp and the support column through a dovetail groove to adjust the distance between the specimen clamps. However, the dovetail groove connection method has low connection strength, and the concrete sample requires a large force to break. The dovetail groove connection method easily causes the specimen clamp and the support column to separate, and the reliability of the equipment is poor. At the same time, due to the obstruction of the pressure sensor, the specimen clamp cannot be brought closer, and some shorter samples cannot be detected. Utility Model Content

[0003] In order to solve the above problems, the present application proposes a device for testing the compressive strength of concrete. By setting a sample fixing sleeve that can slide as a whole, it can meet the testing needs of samples of different lengths. At the same time, a pressure plate is set on the hydraulic cylinder so that the sample fixing sleeve can be closer, so that shorter samples can be tested, thereby improving the detection range of the equipment.

[0004] This application is achieved through the following technical solutions:

[0005] The present application proposes a device for detecting the compressive strength of concrete, comprising: a workbench, a sample fixing sleeve, a hydraulic rod, and a pressure plate. The workbench is provided with a support leg at the bottom, the hydraulic rod is installed in the middle of the workbench, the telescopic end of the hydraulic rod faces upward, and a pressure sensor is provided at the upper end of the telescopic end of the hydraulic rod, and the pressure plate is installed on the upper part of the pressure sensor; adjustment slots are provided on both sides of the workbench, and the lower part of the sample fixing sleeve is respectively installed in the adjustment slots; the pressure plate is perpendicular to the axial direction of the sample fixing sleeve.

[0006] Furthermore, the adjustment slots are provided with grooves at intervals, and the lower part of the sample fixing sleeve is provided with protrusions corresponding to the shape of the grooves, and the protrusions are clamped in the grooves.

[0007] Furthermore, the intervals between the grooves are 5 mm to 10 mm.

[0008] Furthermore, support blocks are provided on both sides of the sample fixing sleeve, and the support blocks are connected to the sample fixing sleeve through bolts, and the lower ends of the support blocks are tightly attached to the upper end surface of the workbench.

[0009] Furthermore, vertical guide rails are provided on both sides of the workbench, and both ends of the pressing plate are slidably connected to the guide rails.

[0010] Furthermore, a cover plate is provided on the sample fixing sleeve, one side of the cover plate is hinged to one of the sample fixing sleeves, and the other end of the cover plate is placed on the upper part of the other sample fixing sleeve.

[0011] Furthermore, the hydraulic rod is connected to a manual oil pump or an electric oil pump.

[0012] Furthermore, the inner side of the sample fixing sleeve extends 2 cm to 4 cm toward the center of the workbench.

[0013] The beneficial effects of the present application are as follows: by fixing the lower part of the sample fixing sleeve in the adjustment groove, the adjustment groove can provide a force to ensure the stability of the sample fixing sleeve, so as to offset the huge force generated during detection. At the same time, the pressure plate is used to apply a thrust to the sample, thereby overcoming the interference problem between the pressure sensor and the sample fixing sleeve, so that the sample fixing sleeve can be brought closer to facilitate detection of shorter lengths and improve the detection range of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 This is a structural diagram of the lower part of the workbench of the utility model;

[0016] Figure 3 This is a schematic diagram of the installation of the hydraulic rod of the utility model;

[0017] Figure 4This is a schematic structural diagram of the sample fixing sleeve of the utility model;

[0018] Figure 5 This is a schematic structural diagram of the hydraulic rod of the utility model;

[0019] Figure 6 This is a schematic diagram of the structure of the cover plate of the utility model when it is unfolded;

[0020] In the figure: 1-workbench, 2-sample fixing sleeve, 3-hydraulic rod, 4-pressing plate, 5-support foot, 6-pressure sensor, 7-adjusting slot, 8-groove, 9-protrusion, 10-support block, 11-guide rail, 12-cover plate. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] Furthermore, the terms "first," "second," and so forth, used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include at least one of the aforementioned features. Furthermore, the technical solutions of various embodiments may be combined, but only if they are achievable by persons of ordinary skill in the art. If a combination of technical solutions contradicts or is unachievable, such combination shall be deemed non-existent and outside the scope of protection claimed by this utility model.

[0024] like Figures 1 to 6As shown, an embodiment of the present invention provides a device for detecting the compressive strength of concrete, comprising: a workbench 1, a sample fixing sleeve 2, a hydraulic rod 3, and a pressing plate 4. A support leg 5 is provided at the lower part of the workbench 1, the hydraulic rod 3 is installed in the middle of the workbench 1, the telescopic end of the hydraulic rod 3 faces upward, and a pressure sensor 6 is provided at the upper end of the telescopic end of the hydraulic rod 3, and the pressing plate 4 is installed on the upper part of the pressure sensor 6; adjustment grooves 7 are provided on both sides of the workbench 1, and the lower part of the sample fixing sleeve 2 is respectively installed in the adjustment grooves 7; the pressing plate 4 is perpendicular to the axial direction of the sample fixing sleeve 2.

[0025] Before the test, a special drill is used to drill samples from the building structure. This equipment mainly calculates the compressive strength by testing the bending resistance of the sample. The required diameter of the sample is 40mm to 50mm, and the damage to the building is relatively small. The drilled sample is placed in the through hole on the sample fixing sleeve 2, so that both ends of the sample are located in the sample fixing sleeve 2, and then hydraulic oil is injected into the hydraulic rod 3 through a manual oil pump or an electric oil pump to extend the hydraulic rod 3, thereby driving the pressure plate 4 and the pressure sensor 6 to move upward, and the pressure plate 4 pushes between the samples to subject the sample to shear force. When the shear force reaches a certain level, the sample breaks. At this time, the shear force at the time of fracture has been recorded by the pressure sensor 6, thereby obtaining the bending strength of the sample. The compressive strength of the sample can be calculated by the calculation method disclosed in the patent application number 201110282390.2. During testing, the force applied to the sample holder 2 is transmitted through its lower portion to the adjustment slot 7, thereby ensuring the stability of the sample holder 2 and preventing displacement during testing, thereby ensuring detection accuracy. The pressure plate 4 is perpendicular to the axis of the sample holder 2, allowing the sample holders 2 to be relatively close to each other. After a single sampling, the sample can be cut into multiple parts for testing, improving detection accuracy. This also allows the detection device to detect shorter samples, extending the detection range.

[0026] Specifically, if Figure 2 、 Figure 4 As shown, the adjustment groove 7 is provided with grooves 8 at intervals, and the lower part of the sample fixing sleeve 2 is provided with a protrusion 9 corresponding to the shape of the groove 8. The protrusion 9 is clamped in the groove 8 to prevent the sample fixing sleeve 2 from sliding in the adjustment groove 7 during detection. At the same time, the position of the sample fixing sleeve 2 in the adjustment groove 7 can be adjusted grid by grid, which is convenient for adjusting the interval between the sample fixing sleeves 2.

[0027] In a preferred embodiment, the spacing between the grooves 8 is 5 mm to 10 mm, preferably 5 mm or 10 mm, so as to calculate the distance between the sample fixing sleeves 2 and the distance between the support points at both ends of the sample, thereby facilitating the calculation of the anti-bending parameters of the sample.

[0028] Specifically, if Figure 4As shown, support blocks 10 are provided on both sides of the sample fixing sleeve 2. The support blocks 10 are connected to the sample fixing sleeve 2 by bolts. The lower ends of the support blocks 10 are tightly attached to the upper end surface of the workbench 1. When no test is performed, a force is applied to the workbench 1 through the support blocks 10 so that the sample fixing sleeve 2 is still fixed in the adjustment groove 7.

[0029] Preferably, if Figure 1 As shown, vertical guide rails 11 are provided on both sides of the workbench 1, and both ends of the pressing plate 4 are slidably connected to the guide rails 11, so that the pressing plate 4 slides along a straight line, avoiding the pressing plate 4 from deflecting during inspection and ensuring the smooth progress of the experiment.

[0030] In a specific embodiment, Figure 1 、 Figure 6 As shown, a cover plate 12 is provided on the sample fixing sleeve 2. One side of the cover plate 12 is hinged to one of the sample fixing sleeves 2, and the other end of the cover plate 12 is placed on the upper part of the other sample fixing sleeve 2. Both are high-hardness concrete samples, which are prone to debris splashing during testing. Therefore, the cover plate 12 is used to cover the upper part of the sample to avoid danger caused by debris splashing.

[0031] Preferably, the hydraulic rod 3 is connected to a manual oil pump or an electric oil pump, and hydraulic oil is injected into the hydraulic rod 3 through the oil pump, so that the hydraulic rod 3 provides the anti-bending ability of the thrust test sample.

[0032] Preferably, if Figure 4 As shown, the inner side of the sample fixing sleeve 2 extends 2 cm to 4 cm toward the center of the workbench 1, so that the ends of the sample fixing sleeve 2 can be closer together. After one sampling, the sample can be cut into more parts for testing, thereby improving the detection accuracy and enabling the detection device to detect shorter samples, thereby increasing the detection range.

[0033] Of course, the present application may have many other implementations. Based on the present implementation, other implementations obtained by ordinary technicians in this field without any creative work are all within the scope of protection of the present application.

Claims

1. A device for detecting the compressive strength of concrete, characterized in that: include: A workbench (1), a sample fixing sleeve (2), a hydraulic rod (3), and a pressing plate (4); the workbench (1) is provided with a support leg (5) at the lower part; the hydraulic rod (3) is installed in the middle part of the workbench (1); the telescopic end of the hydraulic rod (3) faces upward, and a pressure sensor (6) is provided at the upper end of the telescopic end of the hydraulic rod (3); the pressing plate (4) is installed on the upper part of the pressure sensor (6); adjustment grooves (7) are provided on both sides of the workbench (1), and the lower part of the sample fixing sleeve (2) is respectively installed in the adjustment grooves (7); the pressing plate (4) is perpendicular to the axial direction of the sample fixing sleeve (2).

2. A device for detecting the compressive strength of concrete according to claim 1, characterized in that: The adjusting groove (7) is provided with grooves (8) at intervals, and the lower part of the sample fixing sleeve (2) is provided with a protrusion (9) corresponding to the shape of the groove (8), and the protrusion (9) is clamped in the groove (8).

3. A device for detecting the compressive strength of concrete according to claim 2, characterized in that: The intervals between the grooves (8) are 5 mm to 10 mm.

4. A device for detecting the compressive strength of concrete according to claim 2, characterized in that: Support blocks (10) are provided on both sides of the sample fixing sleeve (2). The support blocks (10) are connected to the sample fixing sleeve (2) via bolts, and the lower ends of the support blocks (10) are tightly attached to the upper end surface of the workbench (1).

5. The device for detecting the compressive strength of concrete according to claim 1, characterized in that: Vertical guide rails (11) are provided on both sides of the workbench (1), and both ends of the pressing plate (4) are slidably connected to the guide rails (11).

6. The device for detecting the compressive strength of concrete according to claim 1, characterized in that: The sample fixing sleeve (2) is provided with a cover plate (12), one side of the cover plate (12) is hinged to one of the sample fixing sleeves (2), and the other end of the cover plate (12) is placed on the upper part of the other sample fixing sleeve (2).

7. The device for detecting the compressive strength of concrete according to claim 1, characterized in that: The hydraulic rod (3) is connected to a manual oil pump or an electric oil pump.

8. The device for detecting the compressive strength of concrete according to claim 1, characterized in that: The inner side of the sample fixing sleeve (2) extends 2 cm to 4 cm toward the center of the workbench (1).

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