Horizontal truss structure thermal insulation test platform

Abstract

The utility model provides a horizontal truss structure thermal insulation test platform, and belongs to the technical field of composite material thermal insulation test. The problems that a calculation result of an existing straight cylinder type resin matrix composite material heat preservation effect test has large deviation from actual performance, a heat source and a sensor cannot be arranged in a straight cylinder in a suspended mode through a traditional test means, and the heat preservation effect of a straight cylinder type resin matrix composite material product cannot be accurately reflected are solved. The device comprises a straight cylinder, a horizontal truss and two blanking caps, the straight cylinder sleeves the outer side of the horizontal truss at intervals, a plurality of patch type sensors are uniformly arranged on the inner wall and the outer wall of the straight cylinder, axial flow fans are arranged at two ends of the horizontal truss, a plurality of groups of heating mechanisms are uniformly arranged on the horizontal truss at intervals, and the two groups of heating mechanisms are arranged on the horizontal truss at intervals. And a plurality of rod type sensors are uniformly arranged on the two sides of the horizontal truss. The device is mainly used for testing the thermal insulation performance of a straight cylinder type resin-based composite material product.

Description

TECHNICAL FIELD

[0001] The utility model belongs to composite material heat preservation test technical field, especially, relate to a horizontal truss structure heat preservation test platform. BACKGROUND

[0002] With the rapid development of resin-based composite material technology, the application field is increasingly strict to the requirement of heat preservation performance, especially in the straight cylinder type resin-based composite material product, the accurate test of heat preservation effect becomes the key link of evaluating product performance. At present, the industry generally adopts the estimation method based on the thermal conductivity of each layer material, and the overall heat transfer coefficient is calculated by superimposing the thermal conductivity of each component. However, this method has significant defects: first, the interface thermal resistance between each layer of composite material, the heat flow distribution under actual working condition and the influence of environmental factors (such as air convection) are difficult to accurately simulate through theoretical model, which leads to large deviation between calculation results and actual performance; second, the closed nature and narrow space characteristics of straight cylinder type structure make it impossible to arrange heat source and sensor in the air in the cylinder by traditional test method, which leads to uneven distribution of heat source and insufficient coverage of monitoring points, further aggravating the test error. Therefore, the heat preservation effect of straight cylinder type resin-based composite material product cannot be accurately reflected. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the utility model aims at providing a horizontal truss structure heat preservation test platform to solve the problem that the calculation results of the existing straight cylinder type resin-based composite material heat preservation effect test have large deviation from actual performance, and the traditional test method cannot arrange heat source and sensor in the air in the cylinder, and cannot accurately reflect the heat preservation effect of straight cylinder type resin-based composite material product.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a horizontal truss structure heat preservation test platform, which comprises a straight cylinder, a horizontal truss and two plugs, the straight cylinder is sleeved on the outside of the horizontal truss at intervals, the two plugs are symmetrically arranged at the two ends of the straight cylinder and are connected with the straight cylinder, the two ends of the horizontal truss are connected with the inside of the two plugs respectively, a plurality of patch type sensors are uniformly arranged on the inner wall and the outer wall of the straight cylinder, axial flow fans are arranged at the two ends of the horizontal truss, a plurality of heating mechanisms are uniformly and intervally arranged on the horizontal truss, and a plurality of rod type sensors are uniformly arranged on the two sides of the horizontal truss.

[0005] Further, the horizontal truss is a cuboid frame structure, the horizontal truss comprises two square frames and four cross beams, and the four corners of the two square frames are connected through the four cross beams.

[0006] Further, the materials of the cross beam and the square frame are all angle steels, and the cross beam and the square frame are connected through welding.

[0007] Further, the heating mechanism comprises four heating plates which are symmetrically distributed at four corners of the horizontal truss cross section.

[0008] Further, the axial flow fan, the heating plate and the rod sensor are connected with the cross beam of the horizontal truss through the angle steel connector.

[0009] Further, a through hole is formed in the plug cover at one end of the straight cylinder.

[0010] Further, the material of the plug cover is polyurethane foam material.

[0011] Compared with the prior art, the utility model has the advantages of:

[0012] 1. The utility model provides a horizontal truss structure heat preservation test platform, horizontal trusses are arranged in straight cylinders, and a plurality of heating mechanisms are uniformly distributed on the horizontal trusses, each heating mechanism comprises four heating plates which are symmetrically arranged along the center of the horizontal truss cross section, heat sources are uniformly distributed in the straight cylinder, local overheating or heat accumulation is avoided, meanwhile, patch type sensors are fixed to the inner and outer walls of the straight cylinder, a plurality of rod type sensors are uniformly arranged on the horizontal trusses, and an inner and outer multi-point temperature monitoring network is formed, the layout mode breaks through the limitation of the long and narrow space of the straight cylinder, can simulate the heat transfer path under actual working conditions, provides accurate heat flow distribution data for heat transfer coefficient calculation, realizes the suspended accurate layout of heat sources and sensors, and optimizes the heat flow simulation environment.

[0013] 2. The utility model provides a horizontal truss structure heat preservation test platform, axial flow fans are arranged at both ends of the horizontal truss, can forcibly circulate the air in the cylinder after being electrified, effectively balance the temperature distribution in the closed space, avoid the local temperature difference amplification problem caused by static air, the sealing treatment of the butt joint surface and the hole is carried out in combination with polyurethane foam glue, further insulates external environment interference, ensures the dynamic stability of the temperature field in the test process, the design significantly reduces the error caused by uneven heat convection in the traditional test, and the reliability of experimental results is improved.

[0014] 3. The size of the angle steel of the horizontal truss can be adjusted according to actual needs in the utility model, the number and layout of the heating mechanism can be scaled according to the actual size of the straight cylinder product, the sensor wire is flexibly worn out through the through hole on the plug cover, all components are connected through standardized interfaces, the above design makes the platform can quickly adapt to different specifications of the composite material straight cylinder, does not need customized modification, greatly expands the coverage range of the test scene, and simultaneously reduces the repeated configuration cost of equipment.

[0015] 4, The utility model discloses a patch type sensor (monitoring cylinder wall temperature) and the collaborative work of stick type sensor (monitoring the air temperature in the cylinder), and the real -time acquisition and display temperature difference, heating power and other key parameters are combined with paperless recorder, and the system can automatically calculate the heat transfer coefficient when the temperature difference is stable, and the integrated scheme avoids the subjective error of manual record, shortens the test period, is especially suitable for continuous batch test scene, and significantly improves the test efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated herein in their entirety. The application illustratively described in the drawings is also illustrative in nature and is not intended to limit the scope of the application as it can include other similar structures and / or processes. Such embodiments of the application as shown in the drawings are presented as examples in nature and are not intended to limit the scope of the application. In the drawings:

[0017] Fig. 1 A structure schematic view of a horizontal truss structure heat preservation test platform according to the utility model;

[0018] Fig. 2 An isometric view of a horizontal truss in a horizontal truss structure heat preservation test platform according to the utility model.

[0019] 1 - straight cylinder, 2 - horizontal truss, 3 - plug cover, 4 - patch type sensor, 5 - axial flow fan, 6 - heating mechanism, 7 - stick type sensor, 8 - crossbeam, 9 - square frame, 10 - heating plate. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. It should be explained that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only a part of the embodiments of the utility model, not all the embodiments.

[0021] Referring to Figs. 1-2The embodiment is illustrated. A horizontal truss structure heat preservation test platform, which comprises a straight cylinder 1, a horizontal truss 2 and two plugs 3, the straight cylinder 1 is sleeved on the outside of the horizontal truss 2, the two plugs 3 are symmetrically arranged at the two ends of the straight cylinder 1 and are connected with the straight cylinder 1, the two ends of the horizontal truss 2 are connected with the inside of the two plugs 3 respectively, a plurality of patch type sensors 4 are uniformly arranged on the inner wall and the outer wall of the straight cylinder 1, the patch type sensors 4 are used for monitoring the cylinder wall temperature, axial flow fans 5 are arranged at the two ends of the horizontal truss 2, the axial flow fans 5 can forcibly circulate the air in the straight cylinder 1 after being powered on, effectively balancing the temperature distribution in the closed space, avoiding the problem of local temperature difference amplification caused by static air, combining the sealing treatment of the butt joint surface and the hole by polyurethane foam, further isolating the external environmental interference, ensuring the dynamic stability of the temperature field in the test process, which significantly reduces the error caused by uneven heat convection in the traditional test, improves the reliability of the experimental results, a plurality of heating mechanisms 6 are uniformly and intervaliy arranged on the horizontal truss 2, the heating mechanism 6 comprises four heating plates 10, the four heating plates 10 are symmetrically distributed at the four corners of the cross section of the horizontal truss 2, a plurality of rod type sensors 7 are uniformly arranged on the two sides of the horizontal truss 2, and the rod type sensors 7 are used for monitoring the air temperature in the cylinder.

[0022] The number of the heating mechanism 6 in the embodiment is three groups.

[0023] The embodiment is illustrated. A horizontal truss structure heat preservation test platform, which comprises a straight cylinder 1, a horizontal truss 2 and two plugs 3, the straight cylinder 1 is sleeved on the outside of the horizontal truss 2, the two plugs 3 are symmetrically arranged at the two ends of the straight cylinder 1 and are connected with the straight cylinder 1, the two ends of the horizontal truss 2 are connected with the inside of the two plugs 3 respectively, a plurality of patch type sensors 4 are uniformly arranged on the inner wall and the outer wall of the straight cylinder 1, the patch type sensors 4 are used for monitoring the cylinder wall temperature, axial flow fans 5 are arranged at the two ends of the horizontal truss 2, the axial flow fans 5 can forcibly circulate the air in the straight cylinder 1 after being powered on, effectively balancing the temperature distribution in the closed space, avoiding the problem of local temperature difference amplification caused by static air, combining the sealing treatment of the butt joint surface and the hole by polyurethane foam, further isolating the external environmental interference, ensuring the dynamic stability of the temperature field in the test process, which significantly reduces the error caused by uneven heat convection in the traditional test, improves the reliability of the experimental results, a plurality of heating mechanisms 6 are uniformly and intervaliy arranged on the horizontal truss 2, the heating mechanism 6 comprises four heating plates 10, the four heating plates 10 are symmetrically distributed at the four corners of the cross section of the horizontal truss 2, a plurality of rod type sensors 7 are uniformly arranged on the two sides of the horizontal truss 2, and the rod type sensors 7 are used for monitoring the air temperature in the cylinder.

[0024] The horizontal truss 2 in the embodiment is a cuboid frame structure, the horizontal truss 2 comprises two square frames 9 and four cross beams 8, and the four corners of the two square frames 9 are connected through the four cross beams 8.

[0025] The materials of the cross beams 8 and the square frames 9 are angle steels, and the cross beams 8 and the square frames 9 are connected by welding. The size of the angle steels of the cross beams 8 and the square frames 9 in the horizontal truss 2 can be adjusted according to actual needs. The number and layout of the heating mechanisms 6 can be scaled according to the actual size of the straight cylinder 1. The above design enables the platform to quickly adapt to different specifications of the composite straight cylinder 1 without the need for customized modification, greatly expands the coverage of the test scenarios, and reduces the cost of repeated configuration of the equipment.

[0026] The axial flow fan 5, the heating plate 10, and the rod sensor 7 are connected to the cross beams 8 of the horizontal truss 2 through angle steel connectors. The axial flow fan 5, the heating plate 10, and the rod sensor 7 are connected and fixed to the cross beams 8 of the horizontal truss 2 through angle steel connectors of different sizes and forms. The axial flow fan 5, the heating plate 10, and the rod sensor 7 are connected and fixed to the angle steel connectors through bolts.

[0027] The plug cover 3 at one end of the straight cylinder 1 is provided with a through hole. The cables of the patch sensor 4, the rod sensor 7, the heating plate 10, and the axial flow fan 5 in the straight cylinder 1 pass through the through hole of the plug cover 3. All the butt joints and through holes are sealed with polyurethane foam to ensure the dynamic stability of the temperature field inside the straight cylinder 1 and avoid test errors caused by air leakage or heat exchange.

[0028] The material of the plug cover 3 is polyurethane foam material. The thermal conductivity of polyurethane foam is low, which can significantly reduce the heat loss through the plug cover 3. During the test, this feature helps to maintain the uniformity of heat distribution inside the straight cylinder, avoiding the influence of the accuracy of heat transfer coefficient calculation caused by the high thermal conductivity of the plug cover material.

[0029] The straight cylinder 1 is horizontally fixed, and the patch type sensors 4 are arranged on the inner wall and the outer wall of the straight cylinder 1 uniformly, so that the sensors cover multiple monitoring points in the axial direction and the circumferential direction of the cylinder body. After the sensor wires are bundled, the sensor wires are led out from the through hole of the polyurethane foam plug 3 at one end of the straight cylinder 1 and connected to the paperless recorder. The rectangular frame structure formed by the angle steel welded to form the horizontal truss 2 includes two square frames 9 and four cross beams 8. The four corners of the square frame 9 are welded and fixed through the cross beams 8, and the cross beams 8 are pre-drilled for mounting the heating mechanism 6 and the sensors. Three groups of heating mechanisms 6, each group of four heating plates 10, are arranged at the four corners of the cross section of the horizontal truss 2 in a central symmetric manner, and are fastened to the preset hole positions of the cross beams 8 by screws. Axial flow fans 5 are installed at both ends of the horizontal truss 2, and the air outlet directions of the axial flow fans 5 are directed towards the inside of the straight cylinder 1. A plurality of rod type sensors 7 are uniformly arranged on the cross beams 8 at both sides of the horizontal truss 2, and are used for monitoring the air temperature in the cylinder in real time. The sensor wires are led out through the through hole of the plug 3 and connected to the paperless recorder. The assembled horizontal truss 2 is pushed into the inside of the straight cylinder 1, so that the two ends of the horizontal truss 2 are tightly matched with the inside of the polyurethane foam plug 3. After the plug 3 is embedded into both ends of the straight cylinder 1, the polyurethane foam adhesive is used to seal the joint surface and the wire through hole completely, and the connection between the heating plates 10, the axial flow fans 5 and the sensors and the power supply and the paperless recorder is confirmed to be reliable, so that the data error caused by poor contact is avoided. The axial flow fans 5 and the heating plates 10 are started, and the temperature data of the patch type sensors 4 and the rod type sensors 7 are collected in real time by the paperless recorder. When the temperature difference tends to be stable, the system reaches a thermal equilibrium state. The heating power, the temperature difference and the external surface area S of the cylinder body at this time are recorded, and the overall heat transfer coefficient of the straight cylinder type product is calculated according to the formula "heat transfer coefficient K = heating power / temperature difference x external surface area S of the cylinder body". The heat transfer coefficient K value is the heat transferred through 1 square meter area in 1 second under the condition that the temperature difference between the air on both sides of the surrounding furnace structure is 1 degree (K, ℃), and the unit is watt / (square meter·degree) (W / m2·K, here K can be replaced by ℃).

[0030] In the embodiment, the patch type sensors 4 and the rod type sensors 7 work cooperatively, the paperless recorder is used to collect and display key parameters such as the temperature difference and the heating power in real time, the system can automatically calculate the heat transfer coefficient when the temperature difference is stable, the integrated scheme avoids the subjective error of manual recording, shortens the test period, is especially suitable for continuous batch test scenes, and significantly improves the test efficiency.

[0031] The above disclosed embodiments of the utility model are only used for helping to set forth the utility model. The embodiments do not describe all the details exhaustively, and do not limit the utility model to the specific implementation mode. According to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model.

Claims

1. A horizontal truss structure thermal insulation test platform, characterized in that: It includes straight cylinder (1), horizontal truss (2) and two plugs (3), the straight cylinder (1) is intervally sleeved on the outside of horizontal truss (2), the two plugs (3) are symmetrically arranged at the two ends of straight cylinder (1) and are matched with straight cylinder (1) connection, the two ends of horizontal truss (2) are matched with the inside of two plugs (3) connection respectively, the inner wall and the outer wall of straight cylinder (1) are evenly arranged with multiple patch type sensors (4), the two ends of horizontal truss (2) are provided with axial flow fan (5), multiple groups of heating mechanisms (6) are evenly arranged on horizontal truss (2), the two sides of horizontal truss (2) are evenly arranged with multiple rod type sensors (7).

2. The horizontal truss structure heat preservation test platform according to claim 1, characterized in that: The horizontal truss (2) is a cuboid frame structure, the horizontal truss (2) includes two square frames (9) and four cross beams (8), the four corners of the two square frames (9) are connected by the four cross beams (8).

3. The horizontal truss structure heat preservation test platform according to claim 2, characterized in that: The material of the cross beam (8) and the square frame (9) is angle steel, the cross beam (8) and the square frame (9) are connected by welding.

4. The horizontal truss structure heat preservation test platform according to claim 3, characterized in that: The heating mechanism (6) includes four heating plates (10), the four heating plates (10) are symmetrically distributed at the four corners of the cross section of horizontal truss (2).

5. The horizontal truss structure heat preservation test platform according to claim 4, characterized in that: The axial flow fan (5), the heating plate (10) and the rod type sensor (7) are connected with the cross beam (8) of horizontal truss (2) through angle steel connecting piece.

6. The horizontal truss structure thermal insulation test platform according to claim 1, characterized in that: The plug (3) at one end of the straight cylinder (1) is provided with a through hole.

7. The horizontal truss structure heat preservation test platform according to claim 1, characterized in that: The material of the plug (3) is polyurethane foam material.

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