A hot gas circulation hydrostatic test device for composite panels

Abstract

The utility model belongs to the technical field of composite board performance test equipment, specifically disclose a kind of composite board hot gas circulation hydrostatic test device, specifically including hot-pressing box and the pressing assembly of being arranged in its inside;The inside wall of hot-pressing box is attached with heating pipe, the top center of hot-pressing box is equipped with frequency conversion fan, the output of frequency conversion fan is connected with the circulation air pipe that passes through hot-pressing box, the end of circulation air pipe is connected with two shunt covers by shunt hose, hot-pressing box inside is also embedded with the thermocouple temperature sensor of electric connection with heating pipe.One aspect is combined through hot gas circulation and accurate measurement and control, solves the core problem of traditional device temperature uneven, data inaccurate, provides reliable test condition for composite board performance detection;The other side is through the design of automatic opening and closing and heat insulation protection, both reduce the labor intensity of operator, and also prolong the service life of equipment, realize efficient, accurate, stable composite board hydrostatic test.

Description

Technical Field

[0001] This utility model relates to the technical field of composite board performance testing equipment, and in particular to a composite board hot air circulation hot pressing test device. Background Technology

[0002] The hot-pressing quality of composite boards (such as wood composite boards and composite laminate boards) directly determines their mechanical properties and service life. Therefore, hot-pressing tests have become a core part of material research and development and quality testing.

[0003] In the prior art, hot pressing test devices mostly use a single heating plate to conduct heat. Heat is conducted only through contact, and a temperature gradient is easily formed on the sample surface, causing the test data to deviate from the actual working conditions. Referring to the Chinese utility model patent with patent publication number CN222387154U, although it achieves cooling and transportation after hot pressing, it does not solve the problem of temperature uniformity during hot pressing.

[0004] To address the aforementioned technical shortcomings, a solution is proposed that integrates hot gas circulation and precise measurement and control testing. Utility Model Content

[0005] The purpose of this invention is to provide a composite board hot air circulation hot pressing test device to solve the problems mentioned above.

[0006] The purpose of this utility model can be achieved through the following technical solution: a composite plate hot air circulation hot pressing test device, including a hot pressing chamber and a pressing component disposed therein, a heating tube is fitted to the inner side wall of the hot pressing chamber, a variable frequency fan is installed at the top center of the hot pressing chamber, the output end of the variable frequency fan is connected to a circulation duct that runs through the hot pressing chamber, the end of the circulation duct is connected to two flow dividers through a flow divider hose, and a thermocouple temperature sensor electrically connected to the heating tube is also embedded inside the hot pressing chamber; The pressing assembly includes an upper pressing template and a lower pressing template. The upper pressing template and the lower pressing template are respectively fixedly installed on the inner walls of the two flow dividers. A lifting mechanism is provided between the upper pressing template and the lower pressing template. A pressure sensor is embedded in the lower surface of the upper pressing template.

[0007] Preferably, the hot press chamber includes a frame and a sealing door, an electric push rod is fixedly connected between the frame and the sealing door, and a high-temperature resistant silicone sealing strip is pasted on the inner side of the sealing door.

[0008] Preferably, a filter cartridge is installed in the middle of the circulating air duct, and a gas filter element is provided inside the filter cartridge.

[0009] Preferably, the circulating air duct is a copper spiral structure and is located below the variable frequency fan.

[0010] Preferably, the lifting mechanism includes a heat insulation frame, which is fixedly connected to the side wall of one of the diversion hoods. Multiple sprocket drive shafts are rotatably connected inside the heat insulation frame. The multiple sprocket drive shafts are connected to each other by chain drive. Each sprocket drive shaft is threaded with a screw cylinder. The multiple screw cylinders are respectively fixedly installed at each corner of the other diversion hood. One of the sprocket drive shafts is connected to a drive motor.

[0011] Preferably, the heat insulation frame is hollow inside and has two drainage pipes installed, which are connected to an external cooling box via a water pump.

[0012] The beneficial effects of this utility model are: This invention utilizes a hot air circulation system consisting of a heating tube, a spiral duct, and a distribution hood to achieve forced convection of heat inside the hot press chamber. Combined with real-time control by a thermocouple temperature sensor, it solves the temperature gradient problem caused by traditional contact heating, significantly improving the accuracy and reliability of test data.

[0013] This invention uses an electric push rod to control the opening and closing of the sealing door, combined with the gas purification function of the filter cartridge, which simplifies the operation process, shortens the test preparation time, and avoids contamination of the sample by impurity gases. At the same time, the water-cooling design of the heat insulation frame can prevent high temperature conduction from affecting the service life of the equipment, thus achieving efficient, accurate and stable hot-pressing tests. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings; Figure 1 This is a cross-sectional view of the overall structure of this utility model; Figure 2 This is a partial structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the connection structure of the pressing component of this utility model; Figure 4 This is a schematic diagram of the hot press box structure of this utility model; Figure 5 This is a cross-sectional schematic diagram of the lifting mechanism structure of this utility model.

[0015] Legend: 1. Hot press box; 2. Pressing assembly; 3. Heating tube; 4. Variable frequency fan; 5. Circulating air duct; 6. Diverter hood; 7. Upper pressure plate; 8. Lower pressure plate; 9. Lifting mechanism; 10. Diverter hose; 11. Box frame; 12. Sealing door; 13. Electric push rod; 51. Filter cartridge; 91. Heat insulation frame; 92. Sprocket drive shaft; 93. Screw barrel; 94. Drainage pipe. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those of ordinary skill in the art without creative effort are all within the scope of protection of the present utility model.

[0017] Example 1: The application background of this utility model is based on the performance testing and quality inspection scenarios before mass production of composite boards during the R&D stage. It is especially suitable for the testing of samples such as wood composite boards and composite laminates that have high requirements for hot pressing uniformity. The technical solution of this utility model is to address the problems of temperature gradient and insufficient accuracy of test data caused by uneven heat conduction in existing hot pressing test devices. Please see Figure 1 As shown in Figure 5, this embodiment is a composite board hot air circulation hot pressing test device, including: a hot pressing chamber 1 and a pressing component 2 disposed inside it; Heating tubes 3 are fitted to the inner wall of the hot press box 1. A variable frequency fan 4 is installed at the top center of the hot press box 1. The output end of the variable frequency fan 4 is connected to a circulation duct 5 that runs through the hot press box 1. The end of the circulation duct 5 is connected to two diversion hoods 6 through a diversion hose 10. A thermocouple temperature sensor that is electrically connected to the heating tubes 3 is also embedded inside the hot press box 1. The pressing assembly 2 includes an upper pressing template 7 and a lower pressing template 8. The upper pressing template 7 and the lower pressing template 8 are respectively fixedly installed on the inner walls of the two flow dividers 6. A lifting mechanism 9 is provided between the upper pressing template 7 and the lower pressing template 8. A pressure sensor is embedded in the lower surface of the upper pressing template 7. The lifting mechanism 9 includes a heat insulation frame 91, which is fixedly connected to the side wall of one of the diversion hoods 6. Multiple sprocket drive shafts 92 are rotatably connected inside the heat insulation frame 91. The multiple sprocket drive shafts 92 are connected to each other by chain drive. Each sprocket drive shaft 92 is threaded with a screw barrel 93. The multiple screw barrels 93 are respectively fixedly installed at each corner of the other diversion hood 6. One of the sprocket drive shafts 92 is connected to a drive motor. The heat insulation frame 91 is hollow inside and is equipped with two drainage pipes 94, which are connected to the external cooling box via a water pump.

[0018] Reference Figure 1As shown in Figure 5, during the hot pressing test, the composite plate sample is placed on the surface of the lower pressing template 8, the electric push rod 13 is activated to close the sealing door 12, and the high-temperature resistant silicone sealing strip achieves the sealing of the chamber; the heating tube 3 is powered on to raise the temperature, and the variable frequency fan 4 sends hot air into the spiral circulating air duct 5. After filtering impurities through the filter cartridge 51, the air is evenly blown onto the upper and lower surfaces of the sample through the diverter 6. The thermocouple temperature sensor monitors the temperature in real time and provides feedback to adjust the power of the heating tube 3; at the same time, the drive motor drives the sprocket drive shaft 92 to rotate, and the screw barrel 93 drives the upper pressing template 7 to descend and apply pressure. The pressure sensor displays the pressing pressure in real time and achieves precise control; during the hot pressing process, cooling water is introduced through the drain pipe 94, and the heat insulation frame 91 prevents the high temperature from being conducted to the outside of the equipment.

[0019] Example 2: Please refer to Figure 1 , Figure 2 and Figure 4 As shown, this embodiment is a composite board hot air cycle hot pressing test device, including: hot pressing chamber 1 including chamber frame 11 and sealing door 12, an electric push rod 13 is fixedly connected between chamber frame 11 and sealing door 12, and a high temperature resistant silicone sealing strip is pasted on the inner side of sealing door 12. A filter cartridge 51 is installed in the middle of the circulating air duct 5. The filter cartridge 51 contains a gas filter element. The circulating air duct 5 has a copper spiral structure and is located below the variable frequency fan 4. The copper spiral circulating air duct 5 increases the contact area with hot air, improving heat transfer efficiency. Combined with the wind speed adjustment function of the variable frequency fan 4, it can adapt to the hot pressing requirements of samples of different thicknesses. The opening and closing time of the sealing door 12 driven by the electric push rod 13 is less than 10 seconds, which improves the efficiency by 60% compared with the traditional manual sealing operation. The gas filter element of the filter cartridge 51 can intercept dust and impurities in the air, avoiding indentation defects on the sample surface, which is especially suitable for composite plate tests with high surface precision requirements.

[0020] As can be seen from Examples 1 and 2, on the one hand, by combining hot air circulation with precise measurement and control, the core problems of uneven temperature and inaccurate data in traditional devices are solved, providing reliable test conditions for composite board performance testing; on the other hand, through automated opening and closing and heat insulation protection design, the labor intensity of operators is reduced and the service life of equipment is extended, achieving efficient, accurate and stable composite board hot pressing test.

[0021] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A composite board hot air circulation hot pressing test device, comprising a hot pressing chamber (1) and a pressing assembly (2) disposed therein, characterized in that: Heating tubes (3) are fitted to the inner wall of the hot press box (1). A variable frequency fan (4) is installed at the top center of the hot press box (1). The output end of the variable frequency fan (4) is connected to a circulating air duct (5) that runs through the hot press box (1). The end of the circulating air duct (5) is connected to two flow dividers (6) through a flow divider hose (10). A thermocouple temperature sensor that is electrically connected to the heating tubes (3) is also embedded inside the hot press box (1). The pressing assembly (2) includes an upper pressing template (7) and a lower pressing template (8). The upper pressing template (7) and the lower pressing template (8) are respectively fixedly installed on the inner walls of the two flow dividers (6). A lifting mechanism (9) is provided between the upper pressing template (7) and the lower pressing template (8). A pressure sensor is embedded in the lower surface of the upper pressing template (7).

2. The composite plate hot air circulation hot pressing test device according to claim 1, characterized in that: The hot press box (1) includes a box frame (11) and a sealing door (12). An electric push rod (13) is fixedly connected between the box frame (11) and the sealing door (12), and a high-temperature resistant silicone sealing strip is pasted on the inner side of the sealing door (12).

3. The composite board hot air circulation hot pressing test device according to claim 1, characterized in that: A filter cartridge (51) is installed in the middle of the circulating air duct (5), and a gas filter element is provided inside the filter cartridge (51).

4. The composite board hot air circulation hot pressing test device according to claim 1, characterized in that: The circulating air duct (5) is a copper spiral structure and is located below the variable frequency fan (4).

5. The composite board hot air circulation hot pressing test device according to claim 1, characterized in that: The lifting mechanism (9) includes a heat insulation frame (91), which is fixedly connected to the side wall of one of the diversion hoods (6). Multiple sprocket drive shafts (92) are rotatably connected inside the heat insulation frame (91). The multiple sprocket drive shafts (92) are connected to each other by chain drive. Each sprocket drive shaft (92) is threaded with a screw barrel (93). The multiple screw barrels (93) are respectively fixedly installed at each corner of the other diversion hood (6). One of the sprocket drive shafts (92) is connected to a drive motor.

6. The composite plate hot air circulation hot pressing test device according to claim 5, characterized in that: The heat insulation frame (91) is hollow inside and is equipped with two drainage pipes (94). The two drainage pipes (94) are connected to the external cooling box through a water pump.

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