Device for manufacturing prefabricated crack of asphalt concrete beam

Abstract

The utility model discloses a device for manufacturing a prefabricated crack of an asphalt concrete beam, and the device is composed of a cooling tank, a telescopic iron sheet, an axial telescopic nut, a longitudinal fixing nut, a condensation pipe, a bottom supporting plate, a long-axis supporting and protecting plate and a short-axis supporting and protecting plate. The heat dissipation problem in the crack forming process is solved, and the device has the advantages of being simple in structure, easy to operate and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of experimental testing, and in particular is a device for making prefabricated cracks in asphalt concrete beams. Background Art

[0002] Currently, prefabricated cracks are mainly made in the laboratory by inserting steel plates during the pouring process. However, this method has poor stability during the crack formation process, making it difficult to make ideal prefabricated cracks.

[0003] In patent CN219319905U, a stretchable multi-angle concrete crack making device is disclosed, which uses the cooperation of a first fixed rod, a first movable rod and a first crossbeam connecting the first fixed rod and the first movable rod, a second fixed rod, a second movable rod and a second crossbeam connecting the second fixed rod and the second movable rod, a telescopic rail, a fixed angle ruler and a steel sheet to make a stretchable multi-angle concrete crack. In patent CN219319905U, a test device for preparing cement specimens with cracks is disclosed, which is combined with a base, a baffle plate, a partition plate, a bracket, a baffle column, a top screw, a transverse retaining screw, a pin, a plug system, and a baffle block group to achieve one-time production of multiple cement specimens with cracks of completely consistent size, depth and position. In the above-mentioned prefabricated crack making device, the problems of crack heat dissipation, demoulding and size setting during the concrete molding process are not considered. Therefore, on the basis of considering the heat dissipation problem, it is necessary to design a device for making prefabricated cracks in asphalt concrete beams. Summary of the invention

[0004] The purpose of the present invention is to provide a device for making prefabricated cracks in asphalt concrete beams, by which the size and depth of the prefabricated cracks in asphalt beams can be controlled, and the heat dissipation problem in the crack forming process can be solved. The device has the advantages of simple structure and easy operation.

[0005] To achieve the above purpose, the device is implemented through the following scheme:

[0006] This device is composed of a cooling trough, a telescopic iron sheet, an axial telescopic nut, a longitudinal fixed nut, a condenser, a bottom support plate, a long axis support plate, and a short axis support plate. Among them, the cooling trough is detachable, and the cooling trough is composed of a bottom support plate, a long axis support plate, and a short axis support plate; the telescopic iron sheet is arranged at the bottom of the cooling trough, and the number of telescopic iron sheets can be set according to needs; each telescopic iron sheet is equipped with a corresponding axial telescopic nut; two longitudinal fixed nuts are respectively arranged on both sides of the telescopic iron sheet to fix the position of the telescopic iron sheet; four condensers are respectively arranged on both sides of the cooling trough and the telescopic iron sheet. Among the above components, the telescopic iron sheet, the axial telescopic nut, and the longitudinal fixed nut are made of stainless steel; the bottom support plate, the long axis support plate, and the short axis support plate are made of high temperature resistant materials; and the condenser is made of PVC material.

[0007] Compared with the prior art, this technology has the following beneficial effects:

[0008] Through the coordination among the telescopic iron sheet, the axial telescopic nut and the longitudinal fixed nut, the size and depth of the prefabricated cracks in the asphalt beam can be controlled, and the integrity of the cracks can be ensured during the disassembly process to avoid damage to the cracks; the cooling trough is detachable, and is composed of a bottom support plate, a long-axis support plate and a short-axis support plate. After the asphalt concrete beam is cooled, the bottom support plate, the long-axis support plate and the short-axis support plate are removed from around the asphalt concrete beam, and the demoulding efficiency is high, and the protection effect on the concrete asphalt beam is good; the condenser is arranged on the bottom support plate and the long-axis support plate, and is in contact with the telescopic iron sheet. During the cooling and molding process of the asphalt concrete, the cooling speed of the asphalt concrete can be controlled. When the asphalt passes around the telescopic iron sheet, the asphalt at the prefabricated cracks is evenly cooled to prevent the occurrence of microcracks; the device can improve the accuracy and reliability of indoor tests, and has the advantages of low cost, simple operation and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0010] The present invention will be further described below in conjunction with the accompanying drawings.

[0011] Figure 1 It is a schematic diagram of the main structure of the device of the present invention;

[0012] Figure 2 is a top view of the device of the present invention;

[0013] Figure 3 is a bottom schematic diagram of the device of the present invention;

[0014] Figure 4 is a schematic diagram of the mold assembly;

[0015] Figure 5 It is a schematic diagram of the combination of the bottom support plate, the telescopic iron sheet, the axial telescopic nut, and the longitudinal fixed nut.

[0016] Explanation of the numbers in the figure: 1-cooling trough, 2-telescopic iron sheet, 3-axial telescopic nut, 4-longitudinal fixing nut, 5-condenser, 6-bottom support plate, 7-long axis support plate, 8-short axis support plate. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] A device for controlling cracks in precast asphalt beams, such as Figure 1 to Figure 5 As shown, the device is composed of a cooling trough (1), a telescopic iron sheet (2), an axial telescopic nut (3), a longitudinal fixing nut (4), a condenser tube (5), a bottom support plate (6), a long axis support plate (7), and a short axis support plate (8).

[0019] The steps are as follows:

[0020] The first step is to assemble the bottom support plate (6) with the telescopic iron sheet, the axial telescopic nut and the longitudinal fixing nut according to Figure 5 Secondly, the long axis support plate (7) and the short axis support plate (8) are assembled with the bottom support plate (6) to form a cooling trough (1); then, the condenser tube (5) is assembled according to Figure 1 and Figure 3 The pattern is connected to the cooling trough (1).

[0021] The second step is, first, selecting the number of telescopic iron sheets (2) according to the crack size and depth required for the test; second, fixing the telescopic iron sheets (2) with longitudinal fixing nuts (4) to prevent the telescopic iron sheets (2) from shaking during the pouring process; and then, adjusting the axial telescopic nuts (3) according to the required depth of the prefabricated crack to control the depth of the telescopic iron sheets (2) embedded in the cooling groove (1).

[0022] The third step is to first pour the asphalt concrete into the cooling trough (1) and compact the asphalt concrete; secondly, open the condenser (5), which passes through the prefabricated cracks and the cooling trough (1) to control the overall cooling speed of the asphalt concrete; then, after the asphalt concrete is cooled and formed, close the condenser (5) and proceed to the next step of demoulding.

[0023] The fourth step is to first remove the condenser pipe (5) from the cooling trough (1); secondly, loosen the longitudinal fixing nut (4) and the axial telescopic nut (3), and separate the telescopic iron sheet (2) from the prefabricated crack; then, remove the long-axis support plate (7) and the short-axis support plate (8) from around the asphalt concrete, and separate the asphalt concrete from the bottom support plate (6), so as to obtain an asphalt concrete beam containing prefabricated cracks.

[0024] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0025] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for making prefabricated cracks in asphalt concrete beams, comprising a cooling trough (1), a telescopic iron sheet (2), an axial telescopic nut (3), a longitudinal fixing nut (4), a condenser tube (5), a bottom support plate (6), a long axis support plate (7), and a short axis support plate (8), characterized in that: The cooling trough (1) is detachable and consists of a bottom support plate (6), a long axis support plate (7), and a short axis support plate (8); a plurality of telescopic iron sheets (2) are provided, and a plurality of iron sheets can be provided as required, and are arranged at the bottom of the cooling trough (1); a plurality of axial telescopic nuts (3) are provided, and are combined with the telescopic iron sheet (2); two longitudinal fixing nuts (4) are respectively arranged on both sides of the telescopic iron sheet (2) to fix the position of the telescopic iron sheet (2); and four condensing pipes (5) are arranged on both sides of the cooling trough (1) and the telescopic iron sheet (2).

2. A device for making prefabricated cracks in asphalt concrete beams according to claim 1, characterized in that: The telescopic iron sheet (2), the axial telescopic nut (3), and the longitudinal fixing nut (4) are made of stainless steel; the bottom support plate (6), the long axis support plate (7), and the short axis support plate (8) are made of high temperature resistant material; and the condenser tube (5) is made of PVC material.

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