A device for detecting the thermal insulation performance of a house wall

Abstract

The utility model relates to the field of building thermal performance detection, especially a kind of house wall thermal insulation performance detection device, including cold box, hot box and test piece frame, the cold box and hot box are located respectively two sides of the test piece frame, the test piece frame includes top frame and bottom frame, the top frame and bottom frame are all U-shaped structure, two relatively set assembly connection, the horizontal portion of the bottom frame is provided with clamping device, the clamping device is clamped and fixed to wall body.The test piece frame in the utility model adopts split assembly type structure, is favorable to the disassembly of worker to wall body, improves the convenience of detection work.

Description

Technical Field

[0001] This utility model relates to the field of building thermal performance testing, and in particular to a device for testing the thermal insulation performance of building walls. Background Technology

[0002] The main methods for on-site testing of the heat transfer coefficient of building walls include the heat flow meter method, the hot box method, and the infrared detection method. The heat flow meter method, however, can only be used to test individual points on the wall specimen, thus its accuracy needs improvement. The infrared detection method is significantly affected by weather and temperature factors, thus limiting its application. Considering these factors, the hot box method is currently the most widely used method in testing the thermal insulation performance of walls. The hot box method primarily measures all the heat emitted by the electric heater inside the hot box that passes through the wall specimen, as well as the hot and cold surface temperatures of the wall specimen. The hot box method artificially creates a one-dimensional heat transfer environment. The inner side of the tested area uses a hot box to simulate indoor building conditions, maintaining a consistent temperature between the hot box and the indoor air. The other side uses a cold box to simulate outdoor natural conditions. In this way, the heat flow of the tested area is transferred between the indoor and outdoor environments. When the heating amount inside the hot box reaches equilibrium with the heat transferred through the tested area, the heat transfer amount of the tested area is obtained by measuring the heating amount in the hot box, and the heat transfer coefficient of the tested area is calculated.

[0003] The hot box method testing equipment mainly includes components such as cold box, hot box and specimen frame. The specimen frame is generally a closed frame structure, and the test wall needs to be fixed in the frame. Since the specimen frame is used repeatedly, the test wall is removed after the test is completed. It is quite troublesome for workers to fix and remove the wall. Utility Model Content

[0004] Based on the above problems, the purpose of this utility model is to provide a device for testing the thermal insulation performance of building walls. This utility model adopts the following technical solution:

[0005] This utility model provides a device for testing the thermal insulation performance of building walls, including a cold box, a hot box, and a test specimen frame. The cold box and the hot box are located on both sides of the test specimen frame. The test specimen frame includes a top frame and a bottom frame, both of which are U-shaped and are assembled and connected opposite each other. A clamping device is provided on the horizontal part of the bottom frame to clamp and fix the wall.

[0006] Preferably, the two assembly ends of the top frame and the bottom frame are connected and fixed by locking fasteners.

[0007] Preferably, the top frame assembly end is provided with a positioning protrusion, and the bottom frame assembly end is provided with a positioning groove, wherein the positioning protrusion and the positioning groove are embedded and engaged.

[0008] Preferably, the clamping device includes two fixed baffles, which are fixed at intervals on the horizontal part of the bottom frame; one of the fixed baffles is provided with two tightening bolts.

[0009] Preferably, the base frame is fixed on the mobile trolley, and the bottom of the mobile trolley is provided with omnidirectional rollers.

[0010] Preferably, the mobile trolley is provided with handles at both ends.

[0011] Preferably, both the cold box and the hot box are equipped with track wheels at their bottoms, and the track wheels roll along the tracks laid below.

[0012] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0013] The specimen frame in this invention adopts a split assembly structure, which facilitates the disassembly and assembly of the wall by workers and improves the convenience of the testing work. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the structure of the building wall thermal insulation performance testing device of this utility model;

[0016] Figure 2 This is a schematic diagram of the assembled specimen frame of this utility model;

[0017] Figure 3 This is a structural diagram of the specimen frame of this utility model in its disassembled state.

[0018] Explanation of reference numerals in the attached drawings: 1. Cold box; 2. Hot box; 3. Specimen frame; 301. Top frame; 302. Bottom frame; 303. Clamping device; 303-1. Fixed baffle; 303-2. Fixed baffle; 304. Locking fastener; 305. Positioning protrusion; 306. Positioning groove; 4. Moving trolley; 5. Universal caster; 6. Handle; 7. Track wheel; 8. Track. Detailed Implementation

[0019] To make the technical problems, technical solutions and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0020] like Figures 1 to 3As shown in the figure, this embodiment discloses a device for testing the thermal insulation performance of building walls, including a cold box 1, a hot box 2, and a specimen frame 3. The cold box 1 and the hot box 2 are located on opposite sides of the specimen frame 3, and are typically fixed to the specimen frame 3 by fasteners (i.e., snap-fit ​​structures). The cold box 1 requires a refrigeration device for connection, and the hot box 2 is equipped with a heater. Both the cold box 1 and the hot box 2 employ a sandwich insulation structure. Temperature sensors are also installed in the cold box 1 and the hot box 2 to test temperature changes. The cold box 1 and the hot box 2 are both existing technologies, which can be implemented by those skilled in the art, and will not be described in detail here.

[0021] The innovation of this utility model lies in that the specimen frame 3 is divided into a top frame 301 and a bottom frame 302, both of which are U-shaped and arranged opposite each other; the top frame 301 and the bottom frame 302 are connected by assembly. When the wall is fixed in the specimen frame 3, the top frame 301 is removed in advance, and the top frame 301 and the bottom frame 302 are assembled and fixed after the wall is fixed in the bottom frame 302.

[0022] It should be noted that the wall in this embodiment is a prefabricated component, and its dimensions must be the same as the inner opening dimensions of the specimen frame 3. The gap between the edge of the wall and the inner wall of the specimen frame 3 can be filled with expanding foam. Rubber sealing gaskets are provided at the assembly ends of the top frame 301 and the bottom frame 302 to ensure the overall sealing of the specimen frame 3.

[0023] In this embodiment, a clamping device 303 is provided on the horizontal part of the bottom frame 302 to clamp and fix the wall. Specifically, the clamping device 303 includes two fixing baffles 303-1, which are fixed at intervals on the horizontal part of the bottom frame 302; one of the fixing baffles 303-1 is provided with two tightening bolts 303-2. The wall is inserted between the two fixing baffles 303-1, and then the tightening bolts 303-2 are rotated to fix the wall.

[0024] In this embodiment, the top frame 301 and the bottom frame 302 are connected and fixed on both sides by fasteners 304. Fasteners 304, commonly known as latches (or buckles), are components used to fasten two items. They consist of a movable part and a fixed part, achieving opening and closing functions through engagement and disengagement. They are characterized by vibration resistance and reusability. Their working principle is based on the lever principle; pressing the lever towards the base generates a locking force, and the force is released when the lever is vertically reset, allowing for separation. Common types include drawer latches, seatbelt latches, bag latches, and military latches, with applications in industries such as vehicles, machinery, and cases.

[0025] In this embodiment, the top frame 301 is provided with a positioning protrusion 305 at the assembly end, and the bottom frame 302 is provided with a positioning groove 306 at the assembly end, with the positioning protrusion 305 and the positioning groove 306 being embedded and engaged.

[0026] In this embodiment, the base frame 302 is fixed to the mobile trolley 4, and the bottom of the mobile trolley 4 is equipped with universal casters 5. Handles 6 are provided at both ends of the mobile trolley 4. Track wheels 7 are installed at the bottom of both the cold box 1 and the hot box 2, and the track wheels 7 roll along the track 8 laid below. In use, the specimen frame 3 is pushed between the cold box 1 and the hot box 2 by the mobile trolley 4, and then the cold box 1 and the hot box 2 are pushed respectively to bring them closer to the specimen frame 3.

[0027] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A device for testing the thermal insulation performance of building walls, comprising a cold box (1), a hot box (2), and a specimen frame (3), wherein the cold box (1) and the hot box (2) are respectively located on both sides of the specimen frame (3), characterized in that: The specimen frame (3) includes a top frame (301) and a bottom frame (302). Both the top frame (301) and the bottom frame (302) are U-shaped and are assembled and connected relative to each other. A clamping device (303) is provided on the horizontal part of the bottom frame (302) to clamp and fix the wall.

2. The device for testing the thermal insulation performance of building walls according to claim 1, characterized in that: The top frame (301) and bottom frame (302) are connected and fixed on both sides by fasteners (304).

3. The device for testing the thermal insulation performance of building walls according to claim 1, characterized in that: The top frame (301) has a positioning protrusion (305) at its assembly end, and the bottom frame (302) has a positioning groove (306) at its assembly end. The positioning protrusion (305) and the positioning groove (306) are embedded and cooperate with each other.

4. The device for testing the thermal insulation performance of building walls according to claim 1, characterized in that: The clamping device (303) includes two fixed baffles (303-1), which are fixed at intervals on the horizontal part of the bottom frame (302); one of the fixed baffles (303-1) is provided with two tightening bolts (303-2).

5. The device for testing the thermal insulation performance of building walls according to claim 1, characterized in that: The bottom frame (302) is fixed on the mobile trolley (4), and the bottom of the mobile trolley (4) is provided with universal rollers (5).

6. The device for testing the thermal insulation performance of building walls according to claim 5, characterized in that: The mobile trolley (4) is equipped with handles (6) at both ends.

7. The device for testing the thermal insulation performance of building walls according to claim 1, characterized in that: Both the cold box (1) and the hot box (2) are equipped with track wheels (7) at their bottoms, and the track wheels (7) roll along the track (8) laid below.

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