CN218099173U

CN218099173U - Concrete shrinkage test device

Info

Publication number: CN218099173U
Application number: CN202222060438.1U
Authority: CN
Inventors: 吴修明
Original assignee: Maanshan Magang Jiahua Commercial Concrete Co ltd
Current assignee: Maanshan Magang Jiahua Commercial Concrete Co ltd
Priority date: 2022-08-06
Filing date: 2022-08-06
Publication date: 2022-12-20
Anticipated expiration: 2032-08-06

Abstract

The utility model discloses a concrete shrinkage test device, which belongs to the technical field of test devices, and comprises a base and a bearing platform, wherein the bearing platform is arranged above the base, the bearing platform is provided with a leveling device, the four corners of the bearing platform are provided with vertical support columns, the upper ends of the support columns are provided with a mounting rack, the mounting rack is provided with a first lead screw lifter, the output end of the first lead screw lifter is provided with a second lead screw lifter through a flange, the output end of the second lead screw lifter is provided with a first laser level gauge, one side of the base is provided with a third lead screw lifter, the output end of the third lead screw lifter is provided with a fourth lead screw lifter through a flange, the output end of the fourth lead screw lifter is provided with a second laser level gauge, and the lead screws of the first lead screw lifter, the second lead screw lifter, the third lead screw lifter and the fourth lead screw lifter are all provided with scales; the utility model discloses there is not external force influence during test concrete test block, and measured shrinkage or inflation error are little.

Description

Concrete shrinkage test device

Technical Field

The utility model belongs to the technical field of test device, specifically a concrete shrinkage test device.

Background

Concrete is very sensitive to environmental changes, especially in the days before the pouring is completed. The concrete volume shrinkage is usually caused by drying, temperature, bleeding, sedimentation, self-shrinkage and the like, and plays a vital role in early cracking of the concrete. The cracks lead to the steel bars being exposed in moisture to rust, thereby greatly weakening the strength of the concrete structure and reducing the service life of the engineering structure. The shrinkage cracking mechanism and the cracking tendency of the concrete can be reasonably analyzed by adopting a targeted concrete shrinkage test method, so that the concrete cracking is reduced or prevented by adopting a proper treatment method. Concrete shrinkage test's device is fixed with the concrete test block with the splint among the prior art, then uses the amesdial to measure the shrinkage or the inflation volume of concrete test block, and splint can exert the effort to the concrete when using the splint fixed concrete test block, so can influence the shrink and the inflation of concrete to increase measuring error.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a concrete shrinkage test device for solve following technical problem:

and measuring errors caused by fixing the concrete test block by the clamping plates when the shrinkage or expansion of the concrete test block is measured.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a concrete shrinkage test device, including base and cushion cap, the cushion cap sets up in the top of base, be equipped with levelling device on the cushion cap, the four corners of cushion cap all is equipped with the vertically support column, the upper end of support column is equipped with the mounting bracket, be equipped with first lead screw lift on the mounting bracket, second lead screw lift is installed through the flange to first lead screw lift output, first laser level appearance is installed to second lead screw lift output, one side of base is equipped with third lead screw lift, fourth lead screw lift is installed through the flange to third lead screw lift output, second laser level appearance is installed to fourth lead screw lift output, all there is the scale on the lead screw of first lead screw lift, second lead screw lift, third lead screw lift and fourth lead screw lift.

As the utility model discloses further scheme again: the first lead screw lift is horizontal in the one end and the output of mounting bracket, the output of second lead screw lift and the output of first lead screw lift are perpendicular and for the level, the third lead screw lift is perpendicular in the one end and the output and the ground of base, the output of fourth lead screw lift and the output of third lead screw lift are perpendicular.

As a further aspect of the present invention: the light of the first laser level meter is vertical downward, one light of the second laser level meter is horizontal, and the other light of the second laser level meter is vertical to the ground.

As a further aspect of the present invention: the support column is telescopically adjustable.

As the utility model discloses further scheme again: the mounting bracket is rectangular, and two opposite sides of the first screw rod lifter and the mounting bracket are perpendicular.

As a further aspect of the present invention: when the screw rod scale of the third screw rod lifter is zero, the bearing platform is higher than the horizontal light of the second laser level meter.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the concrete test block has no external force influence, and the measured shrinkage or expansion error is small.

2. The shrinkage or expansion of the concrete is measured by using four lead screw lifters with scales and two laser levels, so that the deformation shrinkage or expansion of the periphery (horizontal) and the upper part (axial) of the concrete test block can be measured, and the test data is more comprehensive.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

FIG. 1 is a front view of a concrete shrinkage test apparatus;

FIG. 2 is a right side view of a concrete shrinkage test apparatus;

FIG. 3 is a top view of a concrete shrinkage test apparatus.

In the figure: 1. a base; 2. a bearing platform; 201. a leveling device; 3. testing concrete blocks; 4. a support pillar; 5. a mounting frame; 601. a first lead screw lifter; 602. a second lead screw lifter; 603. a third lead screw lifter; 604. a fourth screw rod lifter; 701. a first laser level; 702. a second laser level.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1-3, in an embodiment of the present invention, a concrete shrinkage testing apparatus, including a base 1 and a bearing platform 2, the bearing platform 2 is disposed above the base 1, the bearing platform 2 is provided with a leveling device 201, four corners of the bearing platform 2 are all provided with vertical supporting columns 4, upper ends of the supporting columns 4 are provided with a mounting rack 5, the mounting rack 5 is provided with a first lead screw lifter 601, an output end of the first lead screw lifter 601 is provided with a second lead screw lifter 602 through a flange, an output end of the second lead screw lifter 602 is provided with a first laser level 701, one side of the base 1 is provided with a third lead screw lifter 603, an output end of the third lead screw lifter 603 is provided with a fourth lead screw lifter 604 through a flange, an output end of the fourth lead screw lifter 604 is provided with a second laser level 702, the first lead screw lifter 601, the second lead screw lifter 602, the third lead screw lifter 603 and the fourth lead screw lifter 604 are provided with scales.

In an embodiment, referring to fig. 1 to 3, a concrete test block 3 is placed on a bearing platform 2, a leveling device 201 is adjusted to level the bearing platform 2, a first laser level 701 and a second laser level 702 are leveled, the first laser level 701 is started, a first lead screw lift 601 and a second lead screw lift 602 are adjusted to enable an intersection point of light rays of the first laser level 701 to be aligned with one of corner points of the top surface of the concrete test block 3, scale values of the first lead screw lift 601 and the second lead screw lift 602 at the moment are read and recorded to obtain coordinates of the corner points in a top view, coordinates of other three corner points of the top surface of the concrete test block 3 in a top view are obtained by using the same method, the coordinates are recorded as original coordinates of the top surface of the concrete test block 3, the corner points 603 and the fourth lead screw lift 604 are adjusted to obtain coordinates of four side surfaces of the concrete test block 3 in a side view, the coordinates of the side surfaces of the concrete test block 3 are recorded as coordinates of the side surface of the concrete test block 3, the coordinates of the concrete test block 3 are obtained by using the same method, and the coordinates of the expansion amount of the concrete test block after the expansion of the concrete test block is obtained, and the four side deformation amount of the test block is obtained by using the same method after the four side coordinates of the four side surface of the concrete test block 3, and the four side deformation amount of the test block is obtained by using the same method.

In this embodiment, if the concrete test block 3 is a cuboid, the first laser level 701 is only required to be used to measure the positions of the two diagonal points on the top surface of the concrete test block 3 and the second laser level 702 is only required to be used to measure the positions of the two diagonal points on the side surface of the concrete test block 3.

In this embodiment, the precision of the scales on the lead screws of the first lead screw lifter 601, the second lead screw lifter 602, the third lead screw lifter 603, and the fourth lead screw lifter 604 is less than or equal to 0.01mm.

In this embodiment, the first lead screw lifter 601, the second lead screw lifter 602, the third lead screw lifter 603, and the fourth lead screw lifter 604 all use SGB type lead screw lifters produced by shenzhen machinery equipment ltd, tezhou, and the first laser level 701 and the second laser level 702 all use LM580G type laser levels produced by shenzhen giger electromechanical equipment ltd.

In this embodiment, the support column 4 is scalable to be adjusted, makes the device be applicable to the concrete test block 3 of different thickness, and the suitability is better.

In this embodiment, the mounting bracket 5 is rectangular, and two opposite sides of the first screw rod lifter 601 and the mounting bracket 5 are perpendicular, so that the corner points of the top surface of the concrete test block 3 are easily positioned in a top view, and the calculation of the shrinkage or expansion of the concrete test block 3 is simple.

In this embodiment, when the screw scale of the third screw rod lifter 603 is zero, the bearing platform 2 is higher than the horizontal light of the second laser level 702, so as to avoid a measurement blind area occurring during the measurement of the corner coordinates of the concrete test block 3.

The working principle is as follows:

use the utility model provides a during concrete shrinkage test device, place concrete test block 3 on cushion cap 2 earlier, adjust levelling device 201 and make cushion cap 2 level, again with first laser level 701 and the leveling of second laser level 702, open first laser level 701, readjust first lead screw lift 601 and second lead screw lift 602 and make the nodical of the light of first laser level 701 aim at one of them corner of concrete test block 3 top surface, read and record the scale interval of first lead screw lift corner 601 and second lead screw lift 602 this moment, obtain the coordinate of this corner in the top view, use same method again to obtain the other three coordinates in the top view of concrete test block 3 top surface, record this coordinate as the original coordinate of concrete test block 3 top surface, readjust third lead screw lift 603 and fourth lead screw lift 604 of corner point, use same method to obtain the coordinate of four side views of concrete test block 3 side in the test block, record this coordinate as the coordinate of concrete test block 3 side as the original coordinate of concrete test block, the coordinate of 3 side is the shrinkage of concrete test block or the expansion of the coordinate of the original deformation after 3, obtain the expansion of the same method after-up the test block and the expansion of the coordinate of the original deformation.

The foregoing is merely exemplary and illustrative of the structure of the invention, and various modifications, additions and substitutions as described in the detailed description may be made by those skilled in the art without departing from the structure or exceeding the scope of the invention as defined in the claims.

Claims

1. The utility model provides a concrete shrinkage test device, includes base (1) and cushion cap (2), its characterized in that: cushion cap (2) set up in the top of base (1), be equipped with levelling device (201) on cushion cap (2), the four corners of cushion cap (2) all is equipped with vertically support column (4), the upper end of support column (4) is equipped with mounting bracket (5), be equipped with first lead screw lift (601) on mounting bracket (5), second lead screw lift (602) are installed through the flange to first lead screw lift (601) output, and first laser level appearance (701) are installed to second lead screw lift (602) output, one side of base (1) is equipped with third lead screw lift (603), fourth lead screw lift (604) are installed through the flange to third lead screw lift (603) output, and second laser level appearance (702) are installed to fourth lead screw lift (604) output, all have the scale on the lead screw of first lead screw lift (601), second lead screw lift (602), third lead screw lift (603) and fourth lead screw lift (604).

2. A concrete shrinkage test device according to claim 1, characterized in that the first screw lift (601) is horizontal at one end of the mounting frame (5), the output end of the second screw lift (602) is vertical and horizontal with the output end of the first screw lift (601), the third screw lift (603) is vertical at one end of the base (1), the output end of the fourth screw lift (604) is vertical with the output end of the third screw lift (603).

3. A concrete shrinkage test apparatus as claimed in claim 1, wherein the first laser level (701) has a vertical downward light, one of the light of the second laser level (702) is horizontal, and the other light is vertical to the ground.

4. A concrete shrinkage test apparatus according to claim 1, wherein said support columns (4) are telescopically adjustable.

5. A concrete shrinkage test device according to claim 1 or 2, characterized in that the mounting frame (5) is rectangular, and two opposite sides of the first screw rod elevator (601) and the mounting frame (5) are perpendicular.

6. A concrete shrinkage test device according to claim 1, wherein when the screw scale of the third screw elevator (603) is zero, the horizontal light of the bearing platform (2) is higher than that of the second laser level (702).