Concrete shrinkage test device

Abstract

The utility model relates to the field of detection, in particular to a concrete shrinkage test device, and aims to solve the technical problems that only one surface of concrete can be detected and obtained shrinkage data is not representative during detection in the prior art. L-shaped plates are connected to two adjacent edges of the upper surface of a base, and two side surfaces of a concrete block are in contact with the inner walls of the L-shaped plates; the other two side faces of the concrete block are connected with trapezoid blocks, sliding grooves are formed in the side faces, on the corresponding sides of the two trapezoid blocks, of the base, dial indicator clamps are slidably connected into the sliding grooves, dial indicators are clamped into the dial indicator clamps, and the measuring rod axes of the two dial indicators are perpendicular to the corresponding side faces of the concrete block. The length, width and height of concrete can be detected at the same time, shrinkage data of different positions are obtained, the shrinkage rate is accurately measured, the dial indicator is clamped conveniently and firmly, and no measurement error is generated even if the dial indicator is taken out and clamped again.

Description

Technical Field

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

[0002] Ordinary concrete refers to an artificial stone made by mixing cement as the main cementitious material with water, sand, gravel, and chemical admixtures and mineral admixtures when necessary, in appropriate proportions, and through uniform mixing, compacting, forming, curing and hardening. Concrete is mainly divided into two stages and states: the plastic state before coagulation and hardening, i.e. fresh concrete or concrete mixture; the hard state after hardening, i.e. hardened concrete or concrete. The strength grade of concrete is divided according to the standard value of cube compressive strength. The strength grade of ordinary concrete in China is divided into 14 grades: C15, C20, C25, C30, C35, C40, C45, C50, C55, C60, C65, C70, C75 and C80;

[0003] The prior art can only detect one side of the concrete during detection, and the shrinkage data obtained is not representative. The utility model solves the above problem. Utility Model Content

[0004] The utility model provides a concrete shrinkage test device to solve the technical problem that the prior art can only detect one side of concrete and the obtained shrinkage data is not representative.

[0005] A concrete shrinkage test device comprises: a base, two adjacent sides of the upper surface of the base are connected with an L-shaped plate, two side surfaces of a concrete block are in contact with the inner wall of the L-shaped plate, the other two side surfaces of the concrete block are connected with a trapezoidal block, a slide groove is arranged on the side surfaces of the base corresponding to the two trapezoidal blocks, a dial gauge fixture is slidably connected in the slide groove, a dial gauge is clamped in the dial gauge fixture, and the axes of the measuring rods of the two dial gauges are perpendicular to the corresponding side surfaces of the concrete block.

[0006] Furthermore, an L-shaped frame is hinged on the short side of the base. When the L-shaped frame is folded to the maximum, the inner side of the L-shaped frame contacts the short side of the base, and the slide groove is located inside. The micrometer clamp and the micrometer are slidably connected in the slide groove. The axis of the micrometer rod is perpendicular to the upper surface of the concrete block, and the upper surface of the concrete block is connected to a trapezoidal block.

[0007] Furthermore, the micrometer fixture is threadedly connected to the threaded rod, the lower threaded rod is rotatably connected to the base, and the upper threaded rod is rotatably connected to the L-shaped frame.

[0008] Furthermore, the end of the micrometer measuring rod is a curved cone head, the top of the cone is a plane, and a long groove is provided on the plane of the trapezoidal block.

[0009] Furthermore, the micrometer fixture includes a slider, which is slidably connected in a slide groove, which is connected to a slide frame, a semicircular groove is provided on the top of the slide frame, an open clip is connected to the slide frame above the semicircular groove, the sleeve of the micrometer is located in the semicircular groove and clamped by the open clip, the body of the micrometer is located in the table base, the table base is connected to the slide frame, and the inner diameter of the table base is equal to the outer diameter of the micrometer.

[0010] Beneficial effects of the utility model:

[0011] 1. It can simultaneously detect the length, width and height of concrete, obtain shrinkage data at different positions, and accurately measure the shrinkage rate;

[0012] 2. The micrometer is easy and secure to clamp, and will not cause measurement errors even if it is taken out and re-clamped. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0014] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0015] Figure 3 It is a schematic structural diagram of a micrometer fixture 5 of the utility model.

[0016] In the figure: base 1; L-shaped plate 2; concrete block 3; trapezoidal block 4; dial gauge fixture 5; slider 51; slide frame 52; opening clip 53; gauge base 54; slide groove 6; dial gauge 7; L-shaped frame 8; threaded rod 9; arc cone head 10; long groove 11. DETAILED DESCRIPTION

[0017] 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.

[0018] The rotational connection described in this device refers to the process of baking the bearing on the shaft, providing a spring retaining ring groove on the shaft or the shaft hole, and clamping the elastic retaining ring in the retaining ring groove to achieve axial fixation of the bearing and realize rotation; the articulation refers to a connection method that is active on connecting parts such as hinges, pins and short shafts.

[0019] The present invention will be described in detail below with reference to the accompanying drawings.

[0020] Embodiment 1:

[0021] The following is combined with Figure 1-3 The present embodiment describes a concrete shrinkage test device, comprising: a base 1, two adjacent sides of the upper surface of the base 1 are connected with an L-shaped plate 2, two side surfaces of a concrete block 3 are in contact with the inner wall of the L-shaped plate 2, the other two side surfaces of the concrete block 3 are connected with a trapezoidal block 4, a slide groove 6 is provided on the side surfaces of the base 1 corresponding to the two trapezoidal blocks 4, a dial gauge fixture 5 is slidably connected in the slide groove 6, a dial gauge 7 is clamped in the dial gauge fixture 5, and the measuring rod axes of the two dial gauges 7 are perpendicular to the corresponding side surfaces of the concrete block 3;

[0022] Place the concrete block 3 on the base 1 from the top, and the outer corners of the concrete block 3 are in contact with the inner corners of the L-shaped plate 2. At this time, the vertical distance between the end of the measuring rod of the micrometer 7 and the side of the concrete block 3 is less than the height of the trapezoidal block 4. The micrometer fixture 5 is controlled to slide in the slide groove 6. The micrometer fixture 5 drives the measuring rod of the micrometer 7 to slide. The measuring rod slides along the inclined surface of the trapezoidal block 4 and gradually shrinks. When the measuring rod slides to the upper bottom surface of the trapezoidal block 4, the data is recorded. Similarly, by sliding the micrometer fixture 5 on the other side, the length and width of the concrete block 3 before shrinkage can be obtained respectively. After shrinkage, the data are measured again and subtracted to obtain the shrunk length. Even if the height of the concrete block 3 shrinks, the shrunk length will be less than the width of the trapezoidal block 4, and no side measurement error of the length and width will occur.

[0023] The short side of the base 1 is hinged with an L-shaped frame 8. When the L-shaped frame 8 is folded to the maximum, the inner side of the L-shaped frame 8 contacts the short side of the base 1, and the slide groove 6 is located inside. The micrometer fixture 5 and the micrometer 7 are slidably connected in the slide groove 6. The axis of the measuring rod of the micrometer 7 is perpendicular to the upper surface of the concrete block 3. The upper surface of the concrete block 3 is connected with a trapezoidal block 4;

[0024] When detecting the high shrinkage rate of the concrete block 3, the L-shaped frame 8 is first folded and buckled, and the concrete block 3 is placed on the base 1 when the L-shaped frame 8 is not folded. After the L-shaped frame 8 is folded, the axis of the measuring rod of the micrometer 7 is driven to be perpendicular to the upper surface of the concrete block 3, and the sliding micrometer fixture 5 drives the measuring rod to slide and cooperate with the trapezoidal block 4 on the upper surface of the concrete block 3 to complete the detection.

[0025] The dial gauge fixture 5 is threadedly connected to the threaded rod 9, the lower threaded rod 9 is rotatably connected to the base 1, and the upper threaded rod 9 is rotatably connected to the L-shaped frame 8;

[0026] The threaded rod 9 which is axially limited is rotated, and the threaded rod 9 drives the dial gauge fixture 5 to move through the thread, so that the movement of the dial gauge 7 is more stable.

[0027] The end of the measuring rod of the micrometer 7 is a curved cone head 10, the top of the cone is a plane, and a long groove 11 is provided on the plane of the trapezoidal block 4;

[0028] The arc-surface cone head 10 at the end of the measuring rod slides along the inclined surface of the trapezoidal block 4, making the sliding process smoother. When the top plane of the cone is embedded in the long groove 11, reading begins. Each reading is located in the long groove 11, further reducing the error.

[0029] The dial gauge fixture 5 includes a slider 51, which is slidably connected in a slide groove 6, which is connected to a slide frame 52, a semicircular groove is provided on the top of the slide frame 52, an open clip 53 is connected to the slide frame 52 above the semicircular groove, a sleeve of the dial gauge 7 is located in the semicircular groove and clamped by the open clip 53, a dial body of the dial gauge 7 is located in a dial seat 54, the dial seat 54 is connected to the slide frame 52, and the inner diameter of the dial seat 54 is equal to the outer diameter of the dial gauge 7;

[0030] When clamping the micrometer 7, first place the body of the micrometer 7 in the base 54, and the sleeve of the micrometer 7 falls on the open clip 53. Press the sleeve, and the open clip 53 elastically deforms and then resets. The sleeve falls into the semicircular groove and is clamped to complete the fixation. Since the inner diameter of the base 54 is equal to the outer diameter of the micrometer 7, after the sleeve is clamped, the body of the micrometer will not move without the influence of huge external force, and no measurement error will occur even if the micrometer 7 is re-clamped.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0032] 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 concrete shrinkage test device, characterized in that: include: A base (1) is provided, wherein two adjacent sides of the upper surface of the base (1) are connected with an L-shaped plate (2), two side surfaces of a concrete block (3) are in contact with the inner wall of the L-shaped plate (2), and the other two side surfaces of the concrete block (3) are connected with a trapezoidal block (4), and a slide groove (6) is provided on the side surfaces of the base (1) corresponding to the two trapezoidal blocks (4), a dial gauge fixture (5) is slidably connected in the slide groove (6), a dial gauge (7) is clamped in the dial gauge fixture (5), and the measuring rod axes of the two dial gauges (7) are perpendicular to the corresponding side surfaces of the concrete block (3).

2. A concrete shrinkage test device according to claim 1, characterized in that: The short side of the base (1) is hinged with an L-shaped frame (8). When the L-shaped frame (8) is folded to the maximum, the inner side of the L-shaped frame (8) contacts the short side of the base (1), the slide groove (6) is located inside, the dial gauge fixture (5) and the dial gauge (7) are slidably connected in the slide groove (6), the measuring rod axis of the dial gauge (7) is perpendicular to the upper surface of the concrete block (3), and the upper surface of the concrete block (3) is connected to the trapezoidal block (4).

3. A concrete shrinkage test device according to claim 2, characterized in that: The micrometer fixture (5) is threadedly connected to the threaded rod (9), the lower threaded rod (9) is rotatably connected to the base (1), and the upper threaded rod (9) is rotatably connected to the L-shaped frame (8).

4. A concrete shrinkage testing device according to any one of claims 1 to 3, characterized in that: The end of the measuring rod of the micrometer (7) is a curved cone head (10), the top of the cone is a plane, and a long groove (11) is provided on the plane of the trapezoidal block (4).

5. A concrete shrinkage test device according to claim 4, characterized in that: The micrometer fixture (5) comprises a slider (51), the slider (51) is slidably connected in a slide groove (6), the slide groove (6) is connected to a slide frame (52), a semicircular groove is provided on the top of the slide frame (52), an open clip (53) is connected to the slide frame (52) above the semicircular groove, a sleeve of the micrometer (7) is located in the semicircular groove and clamped by the open clip (53), a body of the micrometer (7) is located in a dial seat (54), the dial seat (54) is connected to the slide frame (52), and the inner diameter of the dial seat (54) is equal to the outer diameter of the micrometer (7).

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