CN213579143U

CN213579143U - Concrete test piece strain gauge embedding support device

Info

Publication number: CN213579143U
Application number: CN202022704390.4U
Authority: CN
Inventors: 徐小枫; 黄耀英
Original assignee: China Three Gorges University CTGU
Current assignee: China Three Gorges University CTGU
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-06-29
Anticipated expiration: 2030-11-20

Abstract

The utility model discloses a concrete sample strain gauge embedding support device, which comprises a first support and a second support, wherein the first support and the second support are connected with the inner wall of a concrete sample mould; a strain gauge embedding groove is connected between the first support and the second support; the strain gauge is arranged in the strain gauge embedding groove; the upper surface of the strain gauge embedding groove is provided with a groove plug which is in contact fit with the strain gauge embedding groove; the device has solved prior art when pouring the test piece, can appear that the ligature area fracture leads to the strainometer to shift or the difficult condition of control of position when holding, makes the strainometer produce great inclination in three-dimensional space and influences the problem of follow-up data survey, has convenient accurate fixed strainometer, can used repeatedly, can keep horizontal position in the experiment, do not produce the inclination, characteristics that the precision is higher.

Description

Concrete test piece strain gauge embedding support device

Technical Field

The utility model belongs to the concrete test field, concretely relates to support device is buried underground to concrete test piece strainometer.

Background

In a series of experiments of concrete strain, the burying of the strain gauge is an important link, which is directly related to the accuracy of subsequent measured data and is an important factor which is not negligible. The hydraulic concrete test regulation (SL 352-2006, DL/T5150-2001) gives the embedding requirements of the concrete test piece strain gauge. The traditional method is to fix the die with a binding band or fix and adjust the die by hand. The situation that the position is not easy to control when the binding belt is broken to cause the strain gauge to shift or held by hand can occur in the traditional mode when a test piece is poured, so that the strain gauge generates a large inclination angle in a three-dimensional space to influence the measurement of subsequent data.

Disclosure of Invention

The utility model aims to solve the technical problem that a concrete test piece strainometer buries support device underground is provided, the device has solved prior art when pouring the test piece, the difficult controlled condition in position when can appear the ligature area fracture and lead to the strainometer to shift or hold, make the strainometer produce the problem that great inclination influences follow-up data survey in three-dimensional space, have convenient accurate fixed strainometer, can used repeatedly, can keep horizontal position in the experiment, do not produce the inclination, the higher characteristics of precision.

In order to realize the above design, the utility model adopts the following technical scheme: a concrete test piece strain gauge embedding support device comprises a first support and a second support, wherein the first support and the second support are connected with the inner wall of a concrete test piece mold; a strain gauge embedding groove is connected between the first support and the second support; the strain gauge is arranged in the strain gauge embedding groove; the upper surface of the strain gauge embedding groove is provided with a groove plug which is in contact fit with the strain gauge embedding groove.

Preferably, the first bracket is of a frustum pyramid structure with an opening on the upper surface and the lower surface; the opening on the lower surface of the first support is of an inclined plane opening structure; the strain gauge is a common differential resistance strain gauge.

Preferably, the bottom of the surface of one side, away from the strain gauge embedding groove, of the first support is provided with a feed inlet; the second bracket is the same as the first bracket in structure.

Preferably, handles are connected to the side surfaces of the first bracket and the second bracket.

Preferably, the strain gauge embedding groove comprises a cross-shaped structure groove consisting of a longitudinal groove and a transverse groove; the upper surface and the lower surface of the strain gauge embedding groove are both opened, and the lower surface of the strain gauge embedding groove is not contacted with the bottom of the concrete test piece mold.

Preferably, the groove plug is of a cross structure and is in splicing fit with the strain gauge embedding groove; the upper surface of the groove plug is connected with a pull rod; the groove plug is matched with the embedding groove of the cross structure for use, so that the groove bottom can be leveled, the strain gauge can be horizontally placed, and the strain gauge embedding groove can be prevented from being blocked before the strain gauge is placed.

The utility model provides a support device is buried underground to concrete sample strainometer, its beneficial effect as follows:

the strain gauge mounting device is low in manufacturing cost, light in weight and convenient to use, improves the traditional hand-held or binding mounting method, can effectively eliminate the situation that the position of the strain gauge cannot meet the test requirement in the mounting process, and can mount horizontal and vertical strain gauges simultaneously; due to the special design of the bracket, the contact area with the aggregate is reduced, so that the device is easy to lift out, and the circulation of the aggregate between the lower layers is realized; the support and the cross-shaped groove are provided with a space for reserving a placing space for a cable, the notch of the cross-shaped groove of the strain gauge is a natural screening grid, large and sharp aggregates around the strain gauge are automatically removed during pouring, and the strain gauge is effectively protected.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Fig. 3 is a side view of the first bracket and the strain gauge embedding groove of the present invention.

Fig. 4 is a plan view of the first support, the second support and the strain gauge embedding groove of the present invention.

The reference numbers in the figures are: the concrete sample mold 1, the strain gauge 2, the first support 31, the second support 32, the feed inlet 33, the handle 4, the strain gauge embedding groove 5, the groove plug 6 and the pull rod 61.

Detailed Description

As shown in fig. 1 to 4, the concrete sample strain gauge 2 burying bracket device comprises a first bracket 31 and a second bracket 32, wherein the first bracket 31 and the second bracket 32 are connected with the inner wall of a concrete sample mold 1; a strain gauge embedding groove 5 is connected between the first bracket 31 and the second bracket 32; the strain gauge 2 is arranged in the strain gauge embedding groove 5; the upper surface of the strain gauge embedding groove 5 is provided with a groove plug 6 which is in contact fit with the strain gauge embedding groove 5.

Preferably, the first support 31 is a frustum structure with an opening on the upper and lower surfaces; the openings on the lower surface of the first bracket 31 are all of an inclined plane opening structure; the strain gauge 2 is a common differential resistance strain gauge 2.

Preferably, the bottom of the surface of one side of the first bracket 31 away from the strain gauge embedding groove 5 is provided with a feed inlet 33; the second bracket 32 is identical in structure to the first bracket 31.

Preferably, the handle 4 is attached to both side surfaces of the first bracket 31 and the second bracket 32.

Preferably, the strain gauge embedding groove 5 comprises a cross-shaped structure groove consisting of a longitudinal groove and a transverse groove; the upper surface and the lower surface of the strain gauge embedding groove 5 are both opened, and the lower surface is not contacted with the bottom of the concrete sample mold 1.

Preferably, the groove plug 6 is of a cross structure, and the groove plug 6 is in splicing fit with the strain gauge embedding groove 5; the upper surface of the slot plug 6 is connected with a pull rod 61; the groove plug 6 is used in cooperation with the embedded groove of the cross structure so as to level the bottom of the groove, realize the horizontal placement of the strain gauge 2 and prevent the strain gauge embedded groove 5 from being blocked before the strain gauge 2 is placed.

The utility model provides a concrete sample strainometer 2 buries support device's theory of operation as follows:

when the device is used, all surfaces of the device except the handle 4 are brushed with oil, the device is clamped at a proper position, generally the middle position, of a concrete test block mould, then a matched cross-shaped structure groove plug 6 is plugged, and a first layer of concrete is poured by vibration until the bottom position of the strain gauge embedding groove 5 is reached; because the two sides of the first bracket 31 and the second bracket 32 are trapezoidal openings to the bottom height of the strain gauge embedding groove 5, concrete can enter the bottom of the device from the front side, the rear side, the left side and the right side; when the first layer of concrete reaches the bottom of the groove, the groove plug 6 is pulled out, the strain gauge 2 is placed according to requirements, the pouring test piece continues to be vibrated until the concrete material is filled in the whole concrete mold, then the two handles 4 are tightly held by two hands, the concrete mold is fixed simultaneously, and the device can be lifted out slowly by lifting upwards. Due to the limitation of the width of the notch of the strain gauge embedding groove 5, a large and sharp aggregate is not generally around the strain gauge 2.

The above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims

1. The utility model provides a support device is buried underground to concrete test piece strainometer which characterized in that: the device comprises a first support (31) and a second support (32), wherein the first support (31) and the second support (32) are connected with the inner wall of a concrete sample mold (1); a strain gauge embedding groove (5) is connected between the first bracket (31) and the second bracket (32); the strain gauge (2) is arranged in the strain gauge embedding groove (5); the upper surface of the strain gauge embedding groove (5) is provided with a groove plug (6) which is in contact fit with the strain gauge embedding groove (5).

2. The concrete sample strain gauge embedding bracket device according to claim 1, characterized in that: the first support (31) is of a prismatic table structure with openings in the upper surface and the lower surface; the openings on the lower surface of the first bracket (31) are all in a bevel opening structure.

3. The concrete sample strain gauge embedding bracket device according to claim 1, characterized in that: a feed inlet (33) is formed in the bottom of the surface of one side, away from the strain gauge embedding groove (5), of the first support (31); the second bracket (32) has the same structure as the first bracket (31).

4. The concrete sample strain gauge embedding bracket device according to claim 1, characterized in that: the side surfaces of the first bracket (31) and the second bracket (32) are both connected with a handle (4).

5. The concrete sample strain gauge embedding bracket device according to claim 1, characterized in that: the strain gauge embedding groove (5) comprises a cross-shaped structure groove consisting of a longitudinal groove and a transverse groove; the upper surface and the lower surface of the strain gauge embedding groove (5) are both opened, and the lower surface of the strain gauge embedding groove is not contacted with the bottom of the concrete sample mold (1).

6. The concrete sample strain gauge embedding bracket device according to claim 1, characterized in that: the groove plug (6) is of a cross structure, and the groove plug (6) is in splicing fit with the strain gauge embedding groove (5); the upper surface of the groove plug (6) is connected with a pull rod (61).