CN219162030U - A dual-control protective hot box device for detecting the heat transfer performance of the wall - Google Patents

Abstract

The utility model discloses a double-control protection hot box device for detecting heat transfer performance of a wall body, and belongs to the technical field of wall body detection; it comprises the following steps: a case; the calibration plate is arranged in the box body and divides the box body into a first cavity and a second cavity; the first thermocouple is arranged on one surface of the calibration plate, which is positioned on the first cavity, and the second thermocouple is arranged on the side surface in the second cavity; and a heating rod is arranged in the second cavity. The utility model adopts the box body to replace a building wall body and detect the heat transfer performance in the box body, has small required experimental space, and meets the requirement of detecting the heat transfer performance of the wall body in a laboratory.

Description

A dual-control protective hot box device for detecting the heat transfer performance of the wall

technical field

The utility model relates to the technical field of wall body detection, in particular to a dual-control protective thermal box device for detecting the heat transfer performance of a wall body.

Background technique

At present, effectively reducing heat loss is still an urgent problem to be solved in the field of building energy conservation. The heat in the building is mainly transferred to the outdoor environment through doors, windows, walls, etc., resulting in heat loss. Among them, the heat loss caused by the wall accounts for a large proportion of the overall heat loss of the building. The faster the heat transfer rate of the wall, the more serious the heat loss in the building, indicating that the thermal insulation effect of the wall is worse. Therefore, the heat transfer performance of the wall is an important factor in determining its thermal insulation performance. In order to effectively reduce heat loss and ensure the thermal insulation performance of the wall, it is necessary to test the heat transfer performance of the wall.

At this stage, the wall heat transfer performance testing devices used by various testing institutions are different. The patent (application publication number is CN207992099U) proposes a test frame and a wall insulation performance detection device, which reduces labor costs and improves detection accuracy. But its essence is to build the wall body test piece according to the size of the test piece frame, and to test the thermal insulation performance of the wall body test piece that has been built by masonry. The required experimental space is relatively large, and it is not suitable for popularization and use in the laboratory; No. CN110806425A) proposes a wall thermal insulation detection system, and the test piece is installed in the test piece frame to detect its thermal insulation performance, which improves the detection efficiency and ensures the safety in the detection process. But its installation and disassembly process is relatively complicated.

Therefore, there is an urgent need for a dual-control protective hot box device for detecting wall heat transfer performance that can be popularized and used in laboratories, is simple to operate, and can ensure detection accuracy.

Utility model content

In order to achieve the above object, the utility model adopts the following technical solutions:

A dual-control protective hot box device for detecting the heat transfer performance of a wall, comprising:

box;

a calibration plate, the calibration plate is arranged in the box, and divides the box into a first cavity and a second cavity;

A first thermocouple and a second thermocouple, the first thermocouple is arranged on the side of the calibration plate located in the first cavity, and the second thermocouple is arranged on the side of the second cavity;

A heating rod is arranged in the second cavity.

Further, it also includes a first wire, a second wire, a third wire, a temperature digital display and a digital temperature controller; the first thermocouple is connected to the temperature digital display through the first wire; the The second thermocouple is connected to the temperature digital display through the second wire; the heating rod is connected to the digital temperature controller through the third wire.

Further, the number of the first thermocouple and the number of the second thermocouple is multiple.

Further, a heating rod bracket is also arranged in the second cavity.

Further, wire holes are provided on the side plate of the box.

The utility model has the following beneficial effects:

1. The utility model adopts the box body instead of the building wall and detects its heat transfer performance in the box body, and the required experimental space is small, which meets the requirement of testing the heat transfer performance of the wall body in the laboratory;

2. The box material used in the utility model has good sealing performance and thermal insulation performance, which can reduce heat loss and improve the accuracy of the detection results of the device;

3. The structural design and operation method of the utility model are relatively simple, and can be popularized and used to provide a more direct and simple technical solution for the detection of the heat transfer performance of the wall.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of a dual-control protective heat box device for detecting the heat transfer performance of a wall provided by the utility model;

Fig. 2 is an enlarged cross-sectional view of a dual-control protective heat box device for detecting the heat transfer performance of a wall provided by the utility model;

Fig. 3 is a sectional view of the right part of the calibration plate of a dual-control protective thermal box device for detecting the heat transfer performance of the wall provided by the utility model;

Among them: 1. Temperature digital display instrument; 2. First wire; 3. Cover plate; 4. Wire hole; 5. Digital temperature controller; 6. Third wire; 7. Side plate; 8. Second wire; 9 10. Foam board; 11. Second thermocouple; 12. Heating rod; 13. Heating rod bracket; 14. Calibration plate; 15. First thermocouple.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

Example 1

Referring to Figure 1-3, a dual-control protective heat box device for detecting the heat transfer performance of the wall, including:

A box body, the box body includes a shell 9, a cover plate 3 and a foam board 10;

A calibration plate 14, the calibration plate 14 is arranged in the box, and divides the box into a first cavity and a second cavity;

The first thermocouple 15 and the second thermocouple 11, the first thermocouple 15 is arranged on the side of the calibration plate 14 located in the first cavity, and the second thermocouple 11 is arranged on the side in the second cavity;

A heating rod 12 is arranged in the second cavity; the number of the first thermocouple 15 and the second thermocouple 11 are multiple; a heating rod bracket 13 is also arranged in the second cavity.

In this embodiment, the box body is formed by pasting and compounding a 50 mm thick polystyrene foam board 10 and a 15 mm thick wooden shell 9 with epoxy resin glue, and aluminum foil tape is used to seal the box body and the cover plate 3 to ensure The thermal insulation effect of the device. Use aluminum foil tape to seal the joint between the test piece and the box to avoid heat transfer from the second cavity to the first cavity through the gap. The gap between the wire and the wire hole is filled with polystyrene foam, and sealed with aluminum foil tape to prevent heat leakage during the detection process. The heating rod bracket 13 is made of materials with good heat insulation performance and high temperature resistance, so as to prevent the heating rod 12 from being damaged by the high temperature of the box, and place it in the center of the second cavity of the test piece to heat the space uniform. The specific operation steps are as follows:

1. Use a polystyrene foam board 14 with a specification of 300mm×300mm×30mm as the calibration board. Five patch-type first thermocouples 15 are installed on the two diagonal quarters and the central point of the polystyrene calibration plate 14 sides in the first cavity, and the polystyrene calibration is performed in the second cavity. The center point of the side of the plate 14 and the center point of the other sides in the second cavity are each equipped with a patch-type second thermocouple 11; the heating rod 12 is placed on the heating rod bracket 13 on the right side of the calibration plate; finally, the device cover plate Cover it.

2. Before the test starts, start the heating rod 12 controlled by the digital temperature controller 5 to heat the right side of the test piece, and use the infrared thermal imager to monitor whether the device is sealed.

3. After confirming that the device is sealed, start the heating rod 12 to heat the space on the right side of the calibration plate to 49.5°C±0.5°C. Utilize the temperature digital display instrument 1 connected with the patch type second thermocouple 11 to detect the temperature of the space on the right side of the calibration plate, and by reducing the heating power of the heating rod 12 or stopping the heating, the temperature of the space on the right side of the calibration plate is always maintained at 49.5 °C±0.5°C.

4. Utilize the temperature digital display instrument 1 connected with the patch type first thermocouple 15 to detect the temperature on the left side of the calibration plate, and calculate the time length and heating rate to reach a stable temperature state by observing the temperature change on the left side of the calibration plate. Use this as a benchmark for heat transfer performance.

5. Replace the polystyrene calibration plate with the test piece to test its heat transfer performance according to the above steps, and compare it with the benchmark heat transfer performance of the polystyrene calibration plate to determine whether the heat transfer performance of the test piece is good or bad.

Example 2

This embodiment is a detailed setting based on Embodiment 1.

The dual-control protective heat box device for detecting the heat transfer performance of the wall body provided by this embodiment also includes a first wire 2, a second wire 8, a third wire 6, a temperature digital display instrument 1 and a digital temperature controller 5; The thermocouple 15 is connected to the temperature digital display instrument 1 through the first wire 2; the second thermocouple 11 is connected to the temperature digital display instrument 1 through the second wire 8; the heating rod 12 is connected to the digital temperature controller 5 through the third wire 6;

A wire hole 4 is provided on the side plate 7 of the box body.

The above-mentioned embodiment is only to describe the preferred mode of the present utility model, not to limit the scope of the present utility model. The various deformations and improvements mentioned above should all fall within the scope of protection determined by the claims of the present utility model.

Claims (5)

1. A dual-control protective heat box device for detecting wall heat transfer performance, characterized in that it comprises: box; a calibration plate, the calibration plate is arranged in the box, and divides the box into a first cavity and a second cavity; A first thermocouple and a second thermocouple, the first thermocouple is arranged on the side of the calibration plate located in the first cavity, and the second thermocouple is arranged on the side of the second cavity; A heating rod is arranged in the second cavity. 2. A dual-control protective heat box device for detecting the heat transfer performance of a wall according to claim 1, further comprising a first wire, a second wire, a third wire, a temperature digital display and a digital temperature controller; the first thermocouple is connected to the temperature digital display through the first wire; the second thermocouple is connected to the temperature digital display through the second wire; the heating rod is connected to the temperature digital display through the The third wire is connected with the digital temperature controller. 3 . The dual-control protective heat box device for detecting the heat transfer performance of a wall according to claim 1 , wherein the number of the first thermocouple and the number of the second thermocouple is multiple. 4 . 4 . The dual-control protective heat box device for detecting the heat transfer performance of a wall according to claim 1 , wherein a heating rod bracket is also arranged in the second cavity. 5 . The dual-control protective heat box device for detecting the heat transfer performance of a wall according to claim 1 , wherein a wire hole is provided on the side plate of the box body. 5 .

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