Concrete contractility detection equipment

Abstract

The utility model relates to concrete contractility detection equipment, which is used for solving the technical problems that the position of a digital display dial indicator is singly adjusted by a concrete contractility detection device in the prior art in the background technology, so that the digital display dial indicator cannot be propped against a nail head, and the test data is deviated, and comprises a base, a first guide rail is fixedly arranged on one side of the base, and a second guide rail is fixedly arranged on the other side of the base; a first guide rail is arranged on the base, a clamping block is arranged on the base in a sliding mode and arranged in the first guide rail in a sliding mode, a containing groove used for containing a nail head is formed in the clamping block, a sliding block is arranged on the side, away from the clamping block, of the base in a sliding mode, a digital display dial indicator is arranged on the sliding block, and an adjusting assembly used for adjusting the position of the digital display dial indicator is arranged on the sliding block.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete shrinkage testing, in particular to a concrete shrinkage detection device. Background Art

[0002] Concrete is an important building material used to construct building structures. It has the advantages of high strength and corrosion resistance and is widely used in housing construction, bridges, tunnels and other projects. However, under the influence of the external environment, concrete will expand and contract, which may cause cavity cracking. Therefore, it is necessary to test the shrinkage of concrete.

[0003] A concrete shrinkage detection device in the prior art, such as the utility model patent document with authorization announcement number "CN219978304U" and patent name "Concrete Shrinkage Test Device", discloses a concrete shrinkage detection device, in which a movable seat is provided on the left side of the upper end of the platform, a movable mechanism for controlling the movement of the movable seat is installed inside the platform, a fixed seat is fixedly installed on the right side of the upper end of the platform, a digital dial indicator is provided on the right side of the fixed seat, and a lifting mechanism for controlling the lifting of the digital dial indicator is installed on the right side of the upper end of the platform, a plurality of support blocks are evenly spaced at the upper end of the platform, a concrete block is provided on the upper side of the support block, the movable mechanism includes a groove 1, a through-hole, a movable block and a threaded hole, a groove 1 is provided on the upper side of the platform, a through-hole is provided on the right side of the platform, and the right side of the through-hole is connected to the groove 1, a movable block is fixedly installed on the bottom of the movable seat, the movable block is slidably arranged in the groove 1, and a threaded hole is provided through the movable block.

[0004] When conducting a shrinkage test on concrete, nail heads need to be embedded in both sides of the concrete. Since most of the embedded nail heads are placed manually, the position of the nail heads is not uniform each time, which requires adjusting the position of the digital dial indicator so that the digital dial indicator contacts the nail head. The adjustment of the position of the digital dial indicator in the above patent document is single, which may cause the digital dial indicator to fail to contact the nail head, resulting in deviation in the test data. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of the existing technology and propose a concrete shrinkage detection device to solve the technical problem mentioned in the background technology that the existing concrete shrinkage detection device has a single adjustment for the position of the digital dial indicator, which may cause the digital dial indicator to fail to abut against the nail head, resulting in test data deviation.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A concrete shrinkage detection device includes a base, a first guide rail is fixed to one side of the base, a clamping block is slidably provided on the base and the clamping block is slidably provided in the first guide rail, a receiving groove for accommodating a nail head is provided on the clamping block, a sliding block is slidably provided on the side of the base away from the clamping block, a digital dial indicator is provided on the sliding block, and an adjustment component for adjusting the position of the digital dial indicator is provided on the sliding block.

[0008] Working principle:

[0009] First, the operator places the concrete on the base, then moves the clamping block on the first guide rail, and then abuts the nail head on one side of the concrete with the receiving groove. Then, the operator slides the sliding block and adjusts the position of the digital dial indicator through the adjustment component so that it abuts the nail head on the other side of the concrete.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] First, an adjustment component is provided, which can adjust the position of the digital dial indicator so that the digital dial indicator is in close contact with the nail head on one side of the concrete.

[0012] Second, a clamping block is provided, and the nail head on the concrete can be placed in a receiving groove on the clamping block, and the position of the nail head can be restricted by the receiving groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0014] Figure 2 Schematic diagram of the assembly structure of the support frame and the first sliding block;

[0015] Figure 3 Schematic diagram of the assembly structure of the abutment block and bolts.

[0016] Explanation of the accompanying drawings: base 1, first guide rail 2, clamping block 3, accommodating groove 4, sliding block 5, digital micrometer 6, support frame 7, first screw 8, first slider 9, second screw 10, second slider 11, second guide rod 12, guide groove 13, abutment block 14, bolt 15, first rotating roller 16, second guide rail 17, bidirectional screw 18, third slider 19, second rotating roller 20, sprocket 21, chain 22, worm wheel 23, worm 24, third guide rod 25. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0018] Example:

[0019] like Figure 1 and Figure 3 As shown, a concrete shrinkage detection device includes a base 1, a first guide rail 2 is fixedly provided on one side of the base 1, a clamping block 3 is slidably provided on the base 1 and the clamping block 3 is slidably provided in the first guide rail 2, a receiving groove 4 for accommodating a nail head is opened on the clamping block 3, an abutment block 14 is slidably provided in the first guide rail 2, a bolt 15 is threadedly connected to the clamping block 3, and the bolt 15 slides through the first guide rail 2 and is rotatably connected to the abutment block 14, the clamping block 3 can slide on the first guide rail 2, and the bolt 15 drives the abutment block 14 to abut against the inner wall of the first guide rail 2 to limit the clamping block 3 after movement to prevent the clamping block 3 from moving.

[0020] like Figure 1 and Figure 2 As shown, a sliding block 5 is provided on the side of the base 1 that slides away from the clamping block 3, and two third guide rods 25 are fixed on the base 1. The sliding block 5 is slidably connected to the two third guide rods 25. The setting of the third guide rod 25 can make the sliding block 5 move more smoothly. A groove is provided on the base 1, and the sliding block 5 slides through the sliding block 5 through an external bolt and abuts against the inner wall of the groove to limit the sliding position of the sliding block 5. A digital dial indicator 6 is provided on the sliding block 5, and an adjustment component for adjusting the position of the digital dial indicator 6 is provided on the sliding block 5. The adjustment component includes a support frame 7, a first screw 8, a first slider 9, a second screw 10, a second slider 11 and a second guide rod 12. The support frame 7 is fixed on the sliding block 5, and a guide groove 13 is provided on the support frame 7. The first screw 8 is rotatably set in the guide groove 13 and the axis of the first screw 8 is parallel to the base 1. Both ends of the first screw 8 are smooth round rod segments. 8. A bearing is provided at the connection between the smooth round rod segment and the support frame 7. The first slider 9 is slidably arranged in the guide groove 13 and the first slider 9 is threadedly connected to the first screw 8. The first screw 8 can drive the first slider 9 to move on the guide groove 13. The second screw 10 is threadedly connected to the first slider 9 and the axis of the second screw 10 is perpendicular to the base 1. The second slider 11 is rotatably arranged at the end of the second screw 10. The second guide rod 12 is fixed at the top of the second slider 11 and the second guide rod 12 is slidably connected to the first slider 9. The axis of the second guide rod 12 is parallel to the axis of the second screw 10. The digital dial indicator 6 is fixed to the bottom of the slider. The second slider 11 can be driven close to or away from the base 1 by the second screw 10. The rotation of the second slider 11 can be prevented by the second guide rod 12. A bearing is provided at the connection between the second slider 11 and the second screw 10. The shrinkage of concrete can be detected by the digital dial indicator 6.

[0021] like Figure 1 As shown, a plurality of first rotating rollers 16 are rotatably provided on the base 1 and the axes of the plurality of first rotating rollers 16 are parallel to the base 1 . The arrangement of the first rotating rollers 16 can convert the sliding friction between the concrete block and the base 1 into rolling friction between the concrete block and the first rotating rollers 16 .

[0022] like Figure 1 As shown, a second guide rail 17 is provided between every two first rotating rollers 16, and several second guide rails 17 are fixedly connected to the base 1, and a bidirectional screw 18 is rotatably provided in several second guide rails 17. The connection between the bidirectional screw 18 and the second guide rail 17 is a smooth round rod segment and is connected by a bearing. A third slider 19 is threadedly connected to the two threaded segments of several bidirectional screws 18, and the third slider 19 is slidably connected to the second guide rail 17. The two third sliders 19 on the two threaded segments of the bidirectional screw 18 can be driven by the bidirectional screw 18 to approach or move away from the concrete block. A second rotating roller 20 is rotatably provided on several third sliders 19, and the axis of the second rotating roller 20 is perpendicular to the base 1. By observing the fit between the concrete block and the second rotating roller 20, the vertical angle of the concrete block is ensured, thereby improving the accuracy of the measurement.

[0023] like Figure 1 As shown, sprockets 21 are fixed to the ends of several bidirectional screws 18, and chains 22 are sleeved on the outer rings of several sprockets 21. A worm wheel 23 is fixed to the end of one of the bidirectional screws 18. A worm 24 is rotatably provided on the base 1 and the worm 24 is engaged with the worm wheel 23. The worm wheel 23 is driven by rotating the worm 24, so that the worm wheel 23 drives the bidirectional screws 18 fixed thereto. The bidirectional screw 18 rotates to drive the sprocket 21, and the sprocket 21 drives the chain 22, thereby driving multiple bidirectional screws 18 to rotate synchronously through the chain 22.

[0024] Working principle:

[0025] First, the operator adjusts the position of the clamping block 3 on the first guide rail 2, and then fixes the clamping block 3 by the bolt 15 and the abutment block 14. Then, the operator slides the nail head on the concrete specimen into the receiving groove 4 and places the concrete specimen on the first rotating roller 16. Then, the operator rotates the worm 24, and the worm 24 drives the worm gear 23. The worm gear 23 drives the bidirectional screw 18 fixed to it to rotate. The bidirectional screw 18 drives the sprocket 21, and the sprocket 21 drives the chain 22 to rotate synchronously, thereby driving the multiple bidirectional screws 18 to rotate, and then the two threaded sections on the bidirectional screw 18 drive the two second rotating rollers 20 to approach each other to achieve a certain clamping of the concrete specimen. Finally, the position of the first slider 9 is adjusted by the first screw 8, and the position of the second slider 11 is adjusted by the second screw 10. The digital dial indicator 6 is abutted against the nail head on the other side of the concrete specimen, and the sliding block 5 is limited. Finally, the shrinkage of the concrete specimen is measured by reading the data of the digital dial indicator 6.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A concrete shrinkage detection device, characterized in that: The invention comprises a base (1), a first guide rail (2) fixedly provided on one side of the base (1), a clamping block (3) slidably provided on the base (1) and the clamping block (3) is slidably provided in the first guide rail (2), a receiving groove (4) for receiving a nail head is provided on the clamping block (3), a sliding block (5) is slidably provided on the side of the base (1) away from the clamping block (3), a digital dial indicator (6) is provided on the sliding block (5), and an adjusting component for adjusting the position of the digital dial indicator (6) is provided on the sliding block (5).

2. The concrete shrinkage detection device according to claim 1, characterized in that: The adjusting assembly comprises a support frame (7), a first screw (8), a first slider (9), a second screw (10), a second slider (11) and a second guide rod (12); the support frame (7) is fixed on the sliding block (5); a guide groove (13) is provided on the support frame (7); the first screw (8) is rotatably arranged in the guide groove (13) and the axis of the first screw (8) is parallel to the base (1); the first slider (9) is slidably arranged in the guide groove (13) and the first slider (9) and the first screw are parallel to each other. The rod (8) is threadedly connected, the second screw rod (10) is threadedly connected to the first slider (9) and the axis of the second screw rod (10) is perpendicular to the base (1), the second slider (11) is rotatably arranged at the end of the second screw rod (10), the second guide rod (12) is fixed at the top of the second slider (11) and the second guide rod (12) is slidably connected to the first slider (9), the axis of the second guide rod (12) is parallel to the axis of the second screw rod (10), and the digital micrometer (6) is fixed at the bottom of the slider.

3. The concrete shrinkage detection device according to claim 1, characterized in that: An abutment block (14) is slidably provided in the first guide rail (2), a bolt (15) is threadedly connected to the clamping block (3), and the bolt (15) slides through the first guide rail (2) and is rotatably connected to the abutment block (14).

4. The concrete shrinkage detection device according to claim 1, characterized in that: A plurality of first rotating rollers (16) are rotatably provided on the base (1), and the axes of the plurality of first rotating rollers (16) are parallel to the base (1).

5. The concrete shrinkage detection device according to claim 4, characterized in that: A second guide rail (17) is provided between every two of the first rotating rollers (16), and a plurality of the second guide rails (17) are fixedly connected to the base (1); a bidirectional screw (18) is rotatably provided in a plurality of the second guide rails (17); a third slider (19) is threadedly connected to the two threaded sections of a plurality of the bidirectional screws (18), and the third slider (19) is slidably connected to the second guide rail (17); a second rotating roller (20) is rotatably provided on a plurality of the third sliders (19), and the axis of the second rotating roller (20) is perpendicular to the base (1).

6. The concrete shrinkage detection device according to claim 5, characterized in that: The ends of the plurality of bidirectional screws (18) are fixedly provided with sprockets (21), the outer rings of the plurality of sprockets (21) are sleeved with chains (22), the end of one of the bidirectional screws (18) is fixedly provided with a worm wheel (23), and the base (1) is rotatably provided with a worm (24) and the worm (24) is meshed with the worm wheel (23).

7. The concrete shrinkage detection device according to claim 1, characterized in that: Two third guide rods (25) are fixedly provided on the base (1), and the sliding block (5) is slidably connected to the two third guide rods (25).

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