Device for maintaining temperature difference of inner surface of concrete model under experimental conditions
By setting heating components and temperature sensors in the concrete model and using a temperature control box to control the temperature, the difficulties and costs of large-volume concrete temperature difference experiments were solved, achieving high-precision temperature difference control and accurate test results.
Patent Information
- Application Number
- CN202520042047.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-08
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-01-08
AI Technical Summary
Directly testing the temperature difference of large-volume concrete under experimental conditions is difficult and costly, affecting the accuracy of the test results.
Two templates are set up side by side to form a gap for pouring concrete model, and heating components and temperature sensors are set inside. The temperature of the heating components is controlled by a temperature control box, and uniform heating is achieved through electric heating wires and metal wire mesh. With the help of multi-point temperature measurement, the temperature difference is precisely controlled.
This reduces the difficulty and cost of testing, while improving the precision of temperature difference control and the accuracy of test results.
Smart Images
Figure CN223955489U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to civil engineering concrete structure technical field, concretely is a device that maintains the temperature difference of concrete model under the experimental condition. BACKGROUND
[0002] The temperature inside the concrete is related to the thickness of the concrete and the variety and quantity of cement. The thicker the concrete is, the more cement is used, the higher the hydration heat of the cement is, the higher the internal temperature of the concrete is, the greater the temperature stress is, and the greater the possibility of crack is. For mass concrete, the temperature stress formed is related to the structure size, and within a certain size range, the greater the size of the concrete structure is, the greater the temperature stress is, and thus the greater the risk of causing cracks is, which is the main reason why mass concrete is prone to temperature cracks. Therefore, the most fundamental measure to prevent mass concrete from cracking is to control the temperature difference between the inside and the surface of the concrete.
[0003] It is a common way to determine the temperature difference of mass concrete cracks by using tests, and the basic method is to obtain the final data by testing the temperature difference between the inside and the surface of mass concrete. However, directly using mass concrete as the object of the test will increase the difficulty of the experiment and the cost of the test, and the practicability is poor. CONTENT OF THE UTILITY MODEL
[0004] The utility model aims at providing a device for maintaining the temperature difference between the inside and the surface of a concrete model under experimental conditions to solve the problems raised in the background art.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0006] A device for maintaining the temperature difference between the inside and the surface of a concrete model under experimental conditions, comprising:
[0007] Two forms, two said forms are arranged side by side, and a gap is left between them;
[0008] Concrete model, pouring and forming in the gap;
[0009] Heating assembly, arranged at the middle position inside the concrete model, for changing the temperature inside the concrete model;
[0010] Temperature sensor, arranged on the heating assembly, for detecting the temperature of the heating assembly; and
[0011] Temperature control box, electrically connected with the heating assembly and the temperature sensor.
[0012] Preferably, the heating assembly comprises an electric heating resistance wire, and the electric heating resistance wire is electrically connected with the temperature control box.
[0013] Preferably, the electric heating resistance wire is in a square wave shape.
[0014] Preferably, the heating assembly further comprises a metal wire mesh, and the electric heating resistance wire is arranged on the metal wire mesh.
[0015] Preferably, the distance between two adjacent vertical parts of the electric heating resistance wire in the square wave shape is 6 cm.
[0016] Preferably, the temperature sensor is provided with a plurality of temperature sensors, and each two temperature sensors are spaced apart by three vertical parts.
[0017] Compared with the prior art, the utility model has the beneficial effects that:
[0018] The utility model discloses a heating assembly to the heating action of concrete model, and then cooperate the temperature sensing effect of temperature sensor, and test, can reduce the difficulty of test and the cost of test through the mode of reducing the volume of concrete model, and simultaneously, can also carry out the high-precision control to the temperature difference of concrete model inside and outside, improves the accuracy of test result. BRIEF DESCRIPTION OF DRAWINGS
[0019] Fig. 1 It is the overall overhead structure schematic diagram of the utility model;
[0020] Fig. 2 It is the overhead sectional structure schematic diagram of the template and concrete model of the utility model;
[0021] Fig. 3 It is the side view structure schematic diagram of the heating assembly of the utility model.
[0022] In the drawing: 1, template;11, gap;2, concrete model;3, heating assembly;31, electric heating resistance wire;32, metal wire mesh;4, temperature sensor;5, temperature control box. DETAILED DESCRIPTION
[0023] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings of the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.
[0024] Please refer to Figs. 1-3 The utility model provides a technical scheme:
[0025] The device for maintaining the temperature difference of the inner surface of the concrete model under experimental conditions comprises a template 1, a concrete model 2, a heating assembly 3, a temperature sensor 4 and a temperature control box 5, which are described in detail below.
[0026] The template 1 is provided with two templates arranged side by side with a gap 11 between them; specifically, the gap 11 for pouring concrete to form the concrete model 2 is formed between the two side-by-side templates 1, and the width of the gap 11 (i.e. the distance between the two sides of the template 1) can be adjusted according to the actual situation, which is not specifically limited here. The thickness of the concrete model 2 required is adjusted to the width of the gap 11; the material of the template 1 is not limited here, and in some embodiments, the template 1 can be a wooden template.
[0027] The concrete model 2 is poured and formed in the gap 11; during the mixing of the concrete material, it should be moved slowly, and the experimenter should move and vibrate it according to the standard method, with the vibrator working deeply inside to avoid a large number of bubbles on the surface, affecting the construction effect of the concrete.
[0028] The heating assembly 3 is arranged at the middle position inside the concrete model 2 for changing the temperature inside the concrete model 2; specifically, the heating assembly 3 comprises an electric heating wire 31, which is electrically connected with the temperature control box 5; the temperature control box 5 changes the current size of the electric heating wire 31 according to the temperature inside the concrete model 2 detected by the temperature sensor 4, thereby controlling the heat generation of the electric heating wire 31; in this embodiment, the electric heating wire 31 is in a square wave shape; the heating assembly 3 further comprises a metal mesh 32, and the electric heating wire 31 is arranged on the metal mesh 32; on the one hand, the metal mesh 32 has the ability to conduct heat, which can relatively uniformly transmit the heat generated by the electric heating wire 31 to various positions inside the concrete model 2; on the other hand, the metal mesh 32 can also be used to define the position of the electric heating wire 31, so that it maintains the square wave shape, which is more conducive to improving the heating uniformity of the electric heating wire 31 to the concrete model 2; in some embodiments, the distance between two adjacent vertical parts of the above-mentioned square wave-shaped electric heating wire 31 is 6 cm.
[0029] The temperature sensor 4 is arranged on the heating assembly 3 for detecting the temperature of the heating assembly 3, or in other words, detecting the temperature inside the concrete model 2; the specific model of the temperature sensor 4 is not limited here, and for example, the model of the temperature sensor 4 can be WZPK-378S under the flag of Jinhu Simei Instrument Co., Ltd.
[0030] The temperature control box 5 is electrically connected with the heating assembly 3 and the temperature sensor 4, and the temperature control box 5 is a common temperature control device, which is not described here.
[0031] In the embodiment, the temperature sensor 4 is provided with several, and the interval between every two temperature sensors 4 is three vertical parts, and the vertical part here refers to the vertical part of the square wave-shaped electric heating resistance wire 31, and the purpose of the design is to measure the temperature inside the concrete model 2 at multiple points, and improve the accuracy of the measurement results.
[0032] In the experiment, after pouring the concrete, the concrete model 2 is formed after placing for a certain number of days, and then the formwork 1 is disassembled, the heating assembly 3 is controlled by the temperature control box 5 to heat the concrete model 2, and the temperature difference inside the concrete model under the experimental conditions is observed by observing the reading of the temperature sensor 4. The temperature difference is the main factor causing cracks in the hardening and shrinkage process of the concrete. Through the experiment, in order to reduce the influence of the temperature difference cracks, the concrete construction method should be optimized, the concrete temperature should be strictly controlled, the internal temperature of the concrete should be less than 65 DEG C, and the internal and external temperature difference should be controlled within 25 DEG C, and the adverse effects caused by the temperature should be reduced.
[0033] In the above scheme, the heating assembly 3 is used to heat the concrete model 2, and the temperature sensor 4 is used to measure the temperature, and through the experiment, the difficulty and cost of the experiment can be reduced by reducing the volume of the concrete model 2, and the temperature difference inside and outside the concrete model 2 can be controlled with high precision, and the accuracy of the test results can be improved.
[0034] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. An apparatus for maintaining a temperature difference between the inner and outer surfaces of a concrete model under experimental conditions, characterized by, The utility model relates to a concrete model forming device, which comprises: two templates, two said templates are arranged side by side, and a gap is left between the two templates; a concrete model is cast in the gap; a heating assembly is arranged in the middle of the interior of the concrete model to change the temperature inside the concrete model; a temperature sensor is arranged on the heating assembly to detect the temperature of the heating assembly; and a temperature control box is electrically connected to the heating assembly and the temperature sensor; the heating assembly comprises an electric heating resistance wire, and the electric heating resistance wire is electrically connected to the temperature control box; the electric heating resistance wire is in the shape of a square wave; the heating assembly further comprises a metal mesh, and the electric heating resistance wire is arranged on the metal mesh.
2. The apparatus for maintaining the temperature difference of the inner surface of the concrete model under experimental conditions according to claim 1, wherein The distance between two adjacent vertical parts of the electric heating resistance wire in the shape of a square wave is 6 cm.
3. A device for maintaining temperature difference in the inner surface of a concrete model under experimental conditions according to claim 2, characterized in that, The temperature sensor is provided with a plurality of temperature sensors, and each two temperature sensors are spaced apart by three vertical parts.