Device convenient for measuring concrete strength

Abstract

The utility model discloses a device convenient for measuring the strength of concrete. The device comprises a rebound apparatus main body for measuring the rebound value of the concrete, the limiting frame is used for marking a measurement area, namely a sampling interval, on the to-be-measured concrete; the first movable frame and the second movable frame are arranged on the outer side of the limiting frame in a crossed mode, the marking plate is connected to the inner side of the limiting frame in a clamped mode, a plurality of sets of marking holes are formed in the marking plate, and one end of the rebound apparatus body is inserted into an inner cavity of each marking hole and used for determining the contact point of the rebound apparatus body and concrete. The rebound apparatus main body is limited by utilizing the positioning holes at the crossed positions and the marking holes in the marking plate in the limiting frame, so that the rebound apparatus main body is vertical to the limiting frame, the rebound value measured by the rebound apparatus main body is accurate, then the first movable frame and the second movable frame can be adjusted on the outer side of the limiting frame, and the rebound accuracy is improved. The position of the rebound apparatus main body can be conveniently adjusted, and the error is reduced by averaging multiple data.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete hardness measurement, in particular to a device for measuring concrete strength. Background Art

[0002] The strength grade of concrete refers to the compressive strength of concrete. One of the main indicators of concrete quality is compressive strength. It is not difficult to see from the concrete strength expression that the compressive strength of concrete is proportional to the strength of the cement used in concrete. According to the formula, when the water-cement ratio is equal, the compressive strength of concrete made with high-grade cement is much higher than that of low-grade cement.

[0003] There are many methods for measuring concrete strength, which are mainly divided into non-destructive testing methods and destructive testing methods. The rebound method is one of the traditional non-destructive testing methods. It uses a rebound hammer and a carbonation depth gauge to measure together. When using a rebound hammer to measure the rebound value of concrete, it is necessary to ensure that the rebound hammer is vertical to the concrete to be tested to ensure the accuracy of the data measurement. When using a traditional rebound hammer, workers hold it directly and cannot achieve the optimal vertical angle, so the measured data has a certain deviation. Utility Model Content

[0004] The purpose of the utility model is to provide a device that is convenient for measuring the strength of concrete. The marking plate is positioned by a limiting frame and a limiting frame, and the rebound test hammer body is limited by the marking holes and the positioning holes to ensure that the rebound test hammer body and the limiting frame remain vertical, thereby improving the accuracy of data measurement and solving the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device convenient for measuring the strength of concrete, comprising: a rebound tester body for measuring the rebound value of concrete; a limit frame, used to mark the measurement area, i.e., the sampling interval, on the concrete to be measured; a marking plate clamped to the inner side of the limit frame, wherein a plurality of groups of marking holes are provided on the marking plate, one end of the rebound tester body is plugged into the inner cavity of the marking hole, and is used to determine the contact point between the rebound tester body and the concrete, and a limit frame is provided on the outer side of the limit frame to limit the rebound tester body, so as to ensure that the rebound tester body is perpendicular to the concrete wall; a fixing component arranged on the outer side of the limit frame, used to fix the limit frame on the outer side of the limit frame, so as to ensure the stability of the rebound tester body when in use.

[0006] Preferably, the limiting frame includes a first movable frame and a second movable frame, the first movable frame is located on the outside of the second movable frame, the first movable frame and the second movable frame are vertically intersected, the first movable frame and the second movable frame are both clamped on the outside of the limiting frame, and the surfaces of the first movable frame and the second movable frame are provided with positioning holes, and the rebound instrument body is inserted into the inner cavity of the positioning hole.

[0007] Preferably, a guide groove is provided on the outer side of the limit frame, a guide block is slidably connected to the inner cavity of the guide groove, and the outer side of the guide block passes through the guide groove and is fixedly connected to the inner walls of the first movable frame and the second movable frame respectively.

[0008] Preferably, the fixing assembly includes two groups of movable plates located outside the first movable frame and the second movable frame, two groups of fixing rods are fixed on the opposite sides of the movable plates, through holes are provided on the outsides of the first movable frame and the second movable frame, and multiple groups of sockets are provided on the outside of the limit frame, and the fixing rods pass through the through holes and are engaged with the sockets.

[0009] Preferably, the fixing assembly also includes a fixing cylinder fixed to the outside of the first movable frame and the second movable frame, a movable insertion rod is movably provided in the inner cavity of the fixing cylinder, a limiting ring is fixed to the surface of the movable insertion rod, a supporting spring mounted on the outside of the movable insertion rod is fixed in the inner cavity of the fixing cylinder, and one end of the supporting spring is fixed to the outside of the limiting ring.

[0010] Preferably, the aperture of the positioning hole is larger than the aperture of the marking hole, and the marking holes are evenly arranged on the marking plate in an array.

[0011] Preferably, the distances between adjacent positioning holes on the first movable frame and the second movable frame are the same, and the distance between adjacent positioning holes is the same as the distance between adjacent marking holes.

[0012] Preferably, a limiting cylinder is fixed on the inner side of the second movable frame, and the limiting cylinder is arranged concentrically with the positioning hole.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model sets a first movable frame and a second movable frame which are arranged crosswise with each other on the outer side of the limit frame, and limits the rebound hammer body by using the positioning holes at the cross position and the marking holes on the marking plate inside the limit frame, so as to ensure that the rebound hammer body is perpendicular to the limit frame, so that the rebound value measured by the rebound hammer body is accurate, and then the first movable frame and the second movable frame can be adjusted on the outer side of the limit frame, so as to facilitate the adjustment of the position of the rebound hammer body, and reduce the error by taking the average value of multiple data. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of a partially split three-dimensional structure of the utility model;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the movable plate and the fixed plug rod of the utility model;

[0018] Figure 4 Another structural schematic diagram of the utility model;

[0019] Figure 5 It is a schematic diagram of the cross-sectional three-dimensional structure of the fixing cylinder of the utility model.

[0020] Numbers in the figure: 1. Rebound tester body; 2. Limit frame; 3. Marking plate; 4. Marking hole; 5. Limit frame; 51. First movable frame; 52. Second movable frame; 6. Positioning hole; 7. Guide groove; 8. Guide block; 9. Movable plate; 10. Fixed plug rod; 11. Through hole; 12. Insertion hole; 13. Fixed cylinder; 14. Movable plug rod; 15. Limit ring; 16. Support spring; 17. Limit cylinder. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model provides Figures 1-2 The device shown is convenient for measuring the strength of concrete, comprising: a rebound hammer body 1 for measuring the rebound value of concrete; and a limit frame 2 for marking a measuring area, ie, a sampling interval, on the concrete to be measured.

[0023] A marking plate 3 is clamped to the inner side of the limit frame 2, and a plurality of marking holes 4 are provided on the marking plate 3. One end of the rebound test hammer body 1 is plugged into the inner cavity of the marking hole 4 to determine the contact point between the rebound test hammer body 1 and the concrete. A limiting frame 5 is provided on the outer side of the limit frame 2 to limit the rebound test hammer body 1, so as to ensure that the rebound test hammer body 1 is perpendicular to the concrete wall surface; a fixing component is provided on the outer side of the limiting frame 5, so as to fix the limiting frame 5 on the outer side of the limit frame 2, so as to ensure the stability of the rebound test hammer body 1 when in use;

[0024] By setting a first movable frame 51 and a second movable frame 52 that are cross-set on the outside of the limit frame 2, the rebound tester body 1 is limited by using the positioning holes 6 at the cross position and the marking holes 4 on the marking plate 3 inside the limit frame 2, ensuring that the rebound tester body 1 is perpendicular to the limit frame 2, so that the rebound value measured by the rebound tester body 1 is accurate, and then the first movable frame 51 and the second movable frame 52 can be adjusted on the outside of the limit frame 2, so as to facilitate the adjustment of the position of the rebound tester body 1, and reduce the error by taking the average value of multiple data.

[0025] The limiting frame 5 includes a first movable frame 51 and a second movable frame 52. The first movable frame 51 is located on the outside of the second movable frame 52. The first movable frame 51 and the second movable frame 52 are vertically intersected. The first movable frame 51 and the second movable frame 52 are both clamped on the outside of the limiting frame 2. Positioning holes 6 are opened on the surfaces of the first movable frame 51 and the second movable frame 52. The rebound tester body 1 is inserted into the inner cavity of the positioning hole 6. The first movable frame 51 and the second movable frame 52 are vertically staggered with each other, and the positioning holes 6 that overlap at the intersection are used to position the rebound tester body 1, and cooperate with the marking holes 4 on the marking plate 3 to ensure that the rebound tester body 1 is perpendicular to the limiting frame 2.

[0026] A guide groove 7 is provided on the outer side of the limit frame 2, and a guide block 8 is slidably connected to the inner cavity of the guide groove 7. The outer side of the guide block 8 passes through the guide groove 7 and is fixedly connected to the inner walls of the first movable frame 51 and the second movable frame 52 respectively. The guide block 8 slides in the guide groove 7 to limit the stability of the first movable frame 51 and the second movable frame 52 on the limit frame 2, thereby preventing the first movable frame 51 and the second movable frame 52 from shaking and affecting the accuracy of the positioning hole 6 at the intersection.

[0027] like Figure 3 As shown:

[0028] The fixing assembly includes two groups of movable plates 9 located outside the first movable frame 51 and the second movable frame 52, two groups of fixed plug rods 10 are fixed on the opposite sides of the movable plates 9, through holes 11 are provided on the outsides of the first movable frame 51 and the second movable frame 52, and multiple groups of plug holes 12 are provided on the outside of the limit frame 2. The fixed plug rods 10 penetrate the through holes 11 and are clamped with the plug holes 12. The movable plates 9 and the fixed plug rods 10 penetrate the through holes 11 and are plugged into the plug holes 12, so that the first movable frame 51 and the second movable frame 52 are conveniently fixed on the outside of the limit frame 2, and the first movable frame 51 and the second movable frame 52 can be quickly disassembled and assembled by plugging and unplugging.

[0029] This technical solution also provides another fixing component, such as Figure 4-5 As shown, it is used to fix the first movable frame 51 and the second movable frame 52 with the limit frame 2. The fixing component also includes a fixing cylinder 13 fixed to the outside of the first movable frame 51 and the second movable frame 52. The inner cavity of the fixing cylinder 13 is movably provided with a movable plug rod 14. The surface of the movable plug rod 14 is fixed with a limit ring 15. The inner cavity of the fixing cylinder 13 is fixed with a support spring 16 sleeved on the outside of the movable plug rod 14. One end of the support spring 16 is fixed to the outside of the limit ring 15. The support of the limit ring 15 by the support spring 16 ensures that the movable plug rod 14 moves in the socket 12, thereby fixing the first movable frame 51 and the second movable frame 52, and facilitating the adjustment of the position of the first movable frame 51 and the second movable frame 52.

[0030] The aperture of the positioning hole 6 is larger than that of the marking hole 4, and the marking holes 4 are evenly arranged in an array on the marking plate 3. By comparing the aperture sizes of the positioning holes 6 and the marking holes 4, it is ensured that the rebound test hammer body 1 can be smoothly inserted into the positioning holes 6 and the marking holes 4 and used in normal contact with concrete.

[0031] The distances between adjacent positioning holes 6 on the first movable frame 51 and the second movable frame 52 are the same, and the distance between adjacent positioning holes 6 is the same as the distance between adjacent marking holes 4. By limiting the positions of the positioning holes 6 on the first movable frame 51 and the second movable frame 52, it is ensured that the positioning holes 6 and the marking holes 4 that overlap with each other are aligned through the movement of the first movable frame 51 and the second movable frame 52, so as to ensure that the rebound tester body 1 is perpendicular to the plate surface of the limit frame 2.

[0032] In order to further ensure the stability of the rebound tester body 1, Figure 1 , 2 and 4:

[0033] A limiting cylinder 17 is fixed inside the second movable frame 52 . The limiting cylinder 17 is arranged concentrically with the positioning hole 6 . The setting of the limiting cylinder 17 facilitates further limiting of the rebound hammer body 1 , thereby ensuring the stability of the position of the rebound hammer body 1 .

[0034] During specific use, the marking plate 3 is clamped in the limit frame 2, and then the first movable frame 51 and the second movable frame 52 are arranged on the outside of the limit frame 2 through the guide block 8 and the guide groove 7. The first movable frame 51 and the second movable frame 52 are moved outward from a corner of the limit frame 2 and inserted into the rebound tester body 1 in turn so that the positioning holes 6 on the first movable frame 51 and the second movable frame 52 overlap with each other. At the same time, one end of the rebound tester body 1 is inserted into the marking hole 4, and multiple groups of data are measured in turn through the marking holes 4 on the marking plate 3, and then the average value is taken to reduce the error.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for measuring concrete strength, characterized in that: include: A rebound tester body (1) for measuring the rebound value of concrete; A limit frame (2) is used to mark the measurement area, i.e. the sampling interval, on the concrete to be measured; A marking plate (3) is clamped on the inner side of the limit frame (2), and a plurality of marking holes (4) are provided on the marking plate (3). One end of the rebound test hammer body (1) is inserted into the inner cavity of the marking hole (4) to determine the contact point between the rebound test hammer body (1) and the concrete. A limiting frame (5) is provided on the outer side of the limit frame (2) to limit the rebound test hammer body (1) so as to ensure that the rebound test hammer body (1) is perpendicular to the concrete wall surface. The fixing assembly arranged on the outside of the limiting frame (5) is used to fix the limiting frame (5) on the outside of the limiting frame (2) to ensure the stability of the rebound tester body (1) when in use.

2. A device for measuring concrete strength according to claim 1, characterized in that: The limiting frame (5) comprises a first movable frame (51) and a second movable frame (52); the first movable frame (51) is located outside the second movable frame (52); the first movable frame (51) and the second movable frame (52) are perpendicularly intersected; the first movable frame (51) and the second movable frame (52) are both snap-connected to the outside of the limiting frame (2); positioning holes (6) are provided on the surfaces of the first movable frame (51) and the second movable frame (52); the rebound tester body (1) is plugged into the inner cavity of the positioning hole (6).

3. A device for measuring concrete strength according to claim 1, characterized in that: A guide groove (7) is provided on the outer side of the limit frame (2); a guide block (8) is slidably connected to the inner cavity of the guide groove (7); the outer side of the guide block (8) passes through the guide groove (7) and is fixedly connected to the inner walls of the first movable frame (51) and the second movable frame (52), respectively.

4. A device for measuring concrete strength according to claim 1, characterized in that: The fixing assembly comprises two groups of movable plates (9) located outside the first movable frame (51) and the second movable frame (52); two groups of fixed plug rods (10) are fixed on the opposite sides of the movable plates (9); through holes (11) are provided on the outsides of the first movable frame (51) and the second movable frame (52); a plurality of groups of plug holes (12) are provided on the outside of the limit frame (2); and the fixed plug rods (10) penetrate the through holes (11) and are clamped with the plug holes (12).

5. A device for measuring concrete strength according to claim 1, characterized in that: The fixing assembly further comprises a fixing cylinder (13) fixed to the outside of the first movable frame (51) and the second movable frame (52); a movable insertion rod (14) is movably arranged in the inner cavity of the fixing cylinder (13); a limiting ring (15) is fixed to the surface of the movable insertion rod (14); a supporting spring (16) sleeved on the outside of the movable insertion rod (14) is fixed in the inner cavity of the fixing cylinder (13); one end of the supporting spring (16) is fixed to the outside of the limiting ring (15).

6. A device for measuring concrete strength according to claim 2, characterized in that: The aperture of the positioning hole (6) is larger than the aperture of the marking hole (4), and the marking holes (4) are evenly arranged on the marking plate (3) in an array.

7. A device for measuring concrete strength according to claim 2, characterized in that: The distances between adjacent positioning holes (6) on the first movable frame (51) and the second movable frame (52) are the same, and the distance between adjacent positioning holes (6) is the same as the distance between adjacent marking holes (4).

8. A device for measuring concrete strength according to claim 2, characterized in that: A limiting cylinder (17) is fixed on the inner side of the second movable frame (52), and the limiting cylinder (17) is arranged concentrically with the positioning hole (6).

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