CN214224994U

CN214224994U - Concrete early age coefficient of thermal expansion testing arrangement

Info

Publication number: CN214224994U
Application number: CN202120222582.3U
Authority: CN
Inventors: 黄杰
Original assignee: Taizhou Polytechnic College
Current assignee: Taizhou Polytechnic College
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2021-09-17
Anticipated expiration: 2031-01-27

Abstract

The utility model relates to the technical field of building engineering, and discloses a concrete early age thermal expansion coefficient testing device, which comprises a testing box, wherein a sealing cover is embedded and installed on the upper surface of the testing box, a heating wire is installed at the lower end inside the testing box, a temperature guide plate is fixedly connected above the heating wire inside the testing box, a marking component is arranged on the upper surface of the sealing cover, and a buffer component is arranged outside the lower end of the testing box, through the marking component, a concrete sample expands by heating and pushes up a supporting plate so as to drive a marking pen in the supporting rod top marking component, the right end of the marking pen draws a straight line on marking paper, measures the length of the straight line to accurately calculate the volume of the expanded concrete sample, thereby easily calculating the expansion coefficient, and the testing box is installed in a buffer seat in the buffer component, can carry out buffering damping through springing from top to bottom of first spring and second spring, avoid external vibration to the interference of test result.

Description

Concrete early age coefficient of thermal expansion testing arrangement

Technical Field

The utility model relates to a building engineering technical field specifically is a concrete early age coefficient of thermal expansion testing arrangement.

Background

With the wide application of high-performance concrete, the problem of early cracking of concrete is increasingly prominent, the main reason for influencing the cracking performance of concrete is the instability of early volume of concrete caused by self-contraction and thermal expansion, the coefficient of thermal expansion of concrete refers to the variation of length or volume of concrete per unit length or volume under the change of unit temperature, and is one of the main physical characteristic parameters of materials, and is generally characterized by an average linear thermal expansion coefficient, and the produced concrete needs equipment to test whether the expansion coefficient reaches the standard or not.

However, the test result of the existing test device is not intuitive, the result cannot be obtained correctly and easily, and the existing test device cannot avoid the interference of external vibration on the test result. Accordingly, one skilled in the art provides an apparatus for testing early age thermal expansion coefficient of concrete to solve the above-mentioned problems of the background art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a concrete early age coefficient of thermal expansion testing arrangement to solve the problem that proposes among the above-mentioned background art.

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

the utility model provides a concrete early age coefficient of thermal expansion testing arrangement, includes the test box, the upper surface embedding of test box installs sealed lid, and the inside lower extreme of test box installs the heating wire, the inside of test box is located the top fixedly connected with of heating wire and leads the warm plate, the inside sliding connection of test box has the backup pad, the fixedly connected with bracing piece of upper surface intermediate position department of backup pad, the upper surface of sealed lid is provided with the mark subassembly, the lower extreme outside of test box is provided with the buffering subassembly.

As a further aspect of the present invention: the mark subassembly is including the marking plate, the spout has all been seted up to the left side surface front and back end edge of marking plate, the inside slip and the joint of spout have the slider, the left side surface mounting of marking plate has the marking paper, and the fixed plate is installed to the left of marking plate, the upper surface central point of fixed plate puts the department and runs through and the meshing is connected with limit bolt, and the left side surface activity through connection of fixed plate has the marker pen.

As a further aspect of the present invention: the buffer component comprises a buffer seat, a limiting rod is fixedly connected to the middle position of the inner lower surface of the buffer seat, a first spring is fixedly connected to the inner lower surface of the limiting rod, a telescopic rod is slidably connected to the inner portion of the limiting rod, a second spring is fixedly connected to the left corner and the right corner of the inner lower surface of the buffer seat, a first connecting rod is fixedly connected to one end of the second spring, and a second connecting rod is hinged to one side surface of the first connecting rod.

As a further aspect of the present invention: the electric heating wire is electrically connected with the external controller, and the support rod movably penetrates through the sealing cover.

As a further aspect of the present invention: the marking plate is fixedly connected to the upper surface of the sealing cover, the left end of the sliding block is fixedly connected to the right side surface of the fixing plate, the lower end of the limiting bolt is attached to the surface of the marking pen, the lower surface of the left end of the marking pen is attached to the upper surface of the supporting rod, and the right end of the marking pen is attached to the marking paper.

As a further aspect of the present invention: the lower extreme fixed connection of telescopic link is on the upper surface of first spring, and the upper end fixed connection of telescopic link is on the lower surface of test box, the head rod articulates on the inside lower surface of buffer seat, the upper end fixed connection of second connecting rod is on the lower surface of test box.

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

1. the utility model discloses a be provided with the mark subassembly, thereby the concrete sample is heated the thermal expansion and will upwards push up the marker pen in the backup pad drives the bracing piece and rises to push up the mark subassembly, and a straight line will be drawn on the marker paper to the right-hand member of marker pen, and is very directly perceived, and the staff measures the accurate volume that reachs the post-expansion concrete sample of this straight line length to calculate the coefficient of expansion easily.

2. The utility model discloses a be provided with the buffering subassembly, the test box is installed in the buffer seat in the buffering subassembly, can play from top to bottom through first spring and second spring and cushion the damping, avoids external vibration to the interference of test result.

Drawings

FIG. 1 is a schematic structural diagram of a concrete early-age thermal expansion coefficient testing device;

FIG. 2 is a cross-sectional view of a test box in the concrete early age CTE testing apparatus;

FIG. 3 is a schematic view showing the structure of a marking member of an early age thermal expansion coefficient measuring apparatus for concrete;

FIG. 4 is a cross-sectional view of a cushioning assembly in a concrete early age CTE testing apparatus.

In the figure: 1. a test box; 2. a sealing cover; 3. an electric heating wire; 4. a heat conducting plate; 5. a support plate; 6. a support bar; 7. a marking component; 8. a buffer assembly; 9. a marking plate; 10. a chute; 11. a slider; 12. marking paper; 13. a fixing plate; 14. a limit bolt; 15. a marking pen; 16. a buffer seat; 17. a limiting rod; 18. a first spring; 19. a telescopic rod; 20. a second spring; 21. a first connecting rod; 22. a second connecting rod.

Detailed Description

Referring to fig. 1 to 4, in an embodiment of the present invention, a concrete early age thermal expansion coefficient testing apparatus includes a testing box 1, a sealing cover 2 is embedded in an upper surface of the testing box 1, a heating wire 3 is installed at a lower end inside the testing box 1, the heating wire 3 is electrically connected to an external controller, a temperature guide plate 4 is fixedly connected to an upper portion of the heating wire 3 inside the testing box 1, a supporting plate 5 is slidably connected to an inside of the testing box 1, a supporting rod 6 is fixedly connected to a middle position of an upper surface of the supporting plate 5, the supporting rod 6 movably penetrates through the sealing cover 2, a marking assembly 7 is disposed on an upper surface of the sealing cover 2, the marking assembly 7 includes a marking plate 9, the marking plate 9 is fixedly connected to an upper surface of the sealing cover 2, front and rear end edges of a left side surface of the marking plate 9 are both provided with a sliding groove 10, the inside slip and the joint of spout 10 have slider 11, the left side surface mounting of marking plate 9 has marking paper 12, and the left of marking plate 9 installs fixed plate 13, the left end fixed connection of slider 11 is on the right side surface of fixed plate 13, the upper surface central point department of putting of fixed plate 13 runs through and the meshing is connected with stop bolt 14, and the left side surface activity through connection of fixed plate 13 has marking pen 15, stop bolt 14's lower extreme laminating in marking pen 15's surface, the upper surface of the left end lower surface laminating bracing piece 6 of marking pen 15, and marking pen 15's right-hand member laminating in marking paper 12, thereby the concrete sample is heated the inflation and will be upwards pushed up backup pad 5 and drive the bracing piece 6 and rise, and bracing piece 6 can be upwards pushed up marking pen 15, and marking pen 15's right-hand member will be a straight line on marking paper 12, and is very intuitive, the staff can measure the length of this straight line and accurately obtain the volume of concrete sample after the inflation to calculate the coefficient of expansion.

In fig. 1 and 4: the outer part of the lower end of the test box 1 is provided with a buffer component 8, the buffer component 8 comprises a buffer seat 16, a limiting rod 17 is fixedly connected to the middle position of the inner lower surface of the buffer seat 16, a first spring 18 is fixedly connected to the inner lower surface of the limiting rod 17, a telescopic rod 19 is slidably connected to the inner part of the limiting rod 17, the lower end of the telescopic rod 19 is fixedly connected to the upper surface of the first spring 18, the upper end of the telescopic rod 19 is fixedly connected to the lower surface of the test box 1, the left corner and the right corner of the inner lower surface of the buffer seat 16 are fixedly connected with a second spring 20, one end of the second spring 20 is fixedly connected with a first connecting rod 21, the first connecting rod 21 is hinged to the inner lower surface of the buffer seat 16, one side surface of the first connecting rod 21 is hinged with a second connecting rod 22, and the upper end of the second connecting rod 22 is fixedly connected to the lower surface of the test box 1, the test box 1 is installed in the buffer seat 16, and can be damped by the first spring 18 and the second spring 20 in a vertically bouncing manner, so that the interference of external vibration on the test result is avoided.

The utility model discloses a theory of operation is: during the test the staff opens the door in test box 1 the place ahead and puts the concrete sample on leading warm braw 4, open heating wire 3 and heat leading warm braw 4, the concrete sample is heated the inflation and will upwards push up backup pad 5 and drive bracing piece 6 and rise, bracing piece 6 can upwards push up marker 15 in the mark subassembly 7, marker 15's right-hand member will be drawn a straight line on marker paper 12, very directly perceived, the staff can measure the accurate volume that reachs the concrete sample after the inflation of this straight line length, thereby calculate the coefficient of expansion, test box 1 is installed in the buffer stop 16 in buffering subassembly 8, can bounce from top to bottom through first spring 18 and second spring 20 and cushion the damping, avoid external vibration to the interference of test result.

The above-mentioned, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a concrete early age coefficient of thermal expansion testing arrangement, includes test box (1), its characterized in that, the upper surface embedding of test box (1) installs sealed lid (2), and the inside lower extreme of test box (1) installs heating wire (3), the inside top fixedly connected with that is located heating wire (3) of test box (1) leads warm plate (4), the inside sliding connection of test box (1) has backup pad (5), fixedly connected with bracing piece (6) are located to the upper surface intermediate position of backup pad (5), the upper surface of sealed lid (2) is provided with mark subassembly (7), the lower extreme outside of test box (1) is provided with buffering subassembly (8).

2. The concrete early age coefficient of thermal expansion testing device of claim 1, characterized in that the marking assembly (7) comprises a marking plate (9), sliding grooves (10) are formed in the front and rear edges of the left side surface of the marking plate (9), a sliding block (11) is slidably and clamped in the sliding grooves (10), marking paper (12) is mounted on the left side surface of the marking plate (9), a fixing plate (13) is mounted on the left side of the marking plate (9), a limiting bolt (14) penetrates and is in meshing connection with the center position of the upper surface of the fixing plate (13), and a marking pen (15) penetrates and is movably connected with the left side surface of the fixing plate (13).

3. The concrete early-age thermal expansion coefficient testing device according to claim 1, wherein the buffering component (8) comprises a buffering seat (16), a limiting rod (17) is fixedly connected to the middle position of the inner lower surface of the buffering seat (16), a first spring (18) is fixedly connected to the inner lower surface of the limiting rod (17), a telescopic rod (19) is slidably connected to the inner portion of the limiting rod (17), second springs (20) are fixedly connected to the left corner and the right corner of the inner lower surface of the buffering seat (16), a first connecting rod (21) is fixedly connected to one end of each second spring (20), and a second connecting rod (22) is hinged to one side surface of each first connecting rod (21).

4. The concrete early age coefficient of thermal expansion testing device of claim 1, wherein the heating wire (3) is electrically connected with an external controller, and the support rod (6) is movably penetrated through the sealing cover (2).

5. The concrete early age thermal expansion coefficient testing device as claimed in claim 2, wherein the marking plate (9) is fixedly connected to the upper surface of the sealing cover (2), the left end of the sliding block (11) is fixedly connected to the right side surface of the fixing plate (13), the lower end of the limit bolt (14) is attached to the surface of the marking pen (15), the lower surface of the left end of the marking pen (15) is attached to the upper surface of the supporting rod (6), and the right end of the marking pen (15) is attached to the marking paper (12).

6. The concrete early age thermal expansion coefficient testing device as claimed in claim 3, wherein the lower end of the telescopic rod (19) is fixedly connected to the upper surface of the first spring (18), the upper end of the telescopic rod (19) is fixedly connected to the lower surface of the testing box (1), the first connecting rod (21) is hinged to the inner lower surface of the buffer seat (16), and the upper end of the second connecting rod (22) is fixedly connected to the lower surface of the testing box (1).