Drying oven device

Abstract

The utility model relates to the technical field of building material detection equipment, and particularly discloses a drying oven device which comprises a drying oven body, a containing cavity and a filtering air duct are formed in the drying oven body, and an air inlet and an air outlet of the filtering air duct are both formed in the inner circumferential wall of the drying oven body and communicate with the containing cavity; the filter is arranged in the filtering air duct; the negative pressure piece is arranged in the filtering air duct and used for forming negative pressure at the air inlet. The building material high-temperature aging test comprises a heating step and a performance detection step, the drying oven device is mainly used for the heating step, specifically, a material sample is placed in a containing cavity of a drying oven body to be heated, and for part of special material samples which can generate toxic gas in the heating process, the performance detection step is completed. The poisonous gas is sucked into the filtering air duct through the negative pressure piece and adsorbed through the filter, so that the content of the poisonous gas in the drying oven body is reduced, and the situation that a large amount of poisonous gas causes harm to an operator when the drying oven body is opened after temperature rise is finished is avoided.

Description

Technical Field

[0001] This application belongs to the technical field of building material testing equipment, and specifically relates to an oven device. Background Technology

[0002] High-temperature aging tests on building materials are an important means of evaluating the durability, changes in mechanical properties, and failure mechanisms of materials under high-temperature environments. They are widely used in building fire protection design, industrial high-temperature environment material selection, and other fields. The purpose is to determine the degradation law of the physical and chemical properties of materials under high temperatures, evaluate the fire resistance limit (such as the stability of load-bearing components in a fire), and optimize material formulations (such as fire-resistant concrete and fire-retardant coatings).

[0003] The oven is used for high-temperature aging tests on building materials. Specifically, material samples are placed inside the oven and heated, and the changes in their appearance and physical properties are observed after a preset temperature and time. During the test, some special material samples may produce toxic gases at high temperatures. For example, asphalt produces black toxic fumes at high temperatures. Opening the oven after the preset time will release a large amount of toxic gas, posing a health hazard to the operator. Utility Model Content

[0004] The purpose of this application is to provide an oven apparatus designed to reduce the amount of toxic gases emitted from samples of special materials after the test.

[0005] To achieve the above objectives, this application provides an oven apparatus, comprising:

[0006] The oven body has a receiving cavity and a filter air duct. The air inlet and air outlet of the filter air duct are both located on the inner peripheral wall of the oven body and are connected to the receiving cavity.

[0007] A filter is installed inside the filter duct;

[0008] A negative pressure component is disposed within the filter duct and is used to create negative pressure at the air inlet.

[0009] In some embodiments, the negative pressure element includes a first fan disposed at the air inlet.

[0010] In some embodiments, a second fan is provided at the air outlet.

[0011] In some embodiments, the inner peripheral wall of the oven body is provided with a filter cover for sealing the air inlet and the air outlet.

[0012] In some embodiments, the oven apparatus further includes a controller and a flue gas sensor disposed in the receiving cavity. The flue gas sensor is electrically connected to the controller, and the controller is electrically connected to the filter cover. The flue gas sensor can send an alarm signal to the controller, and the controller can open the filter cover according to the alarm signal.

[0013] In some embodiments, the filter cover is covered with a heat-insulating coating.

[0014] In some embodiments, the oven body is further provided with a first pressure relief channel that connects to the outside and the receiving cavity. The pressure relief inlet of the first pressure relief channel is located on the inner peripheral wall of the oven body, and the pressure relief outlet of the first pressure relief channel is located on the outer peripheral wall of the oven body. A first pressure relief valve is provided in the first pressure relief channel.

[0015] In some embodiments, a third fan is provided at the pressure relief inlet of the first pressure relief channel, and the first pressure relief valve is located at the pressure relief outlet.

[0016] In some embodiments, the oven apparatus further includes a controller and a pressure sensor disposed within the receiving cavity. The pressure sensor is electrically connected to the controller, and the controller is electrically connected to the first pressure relief valve. The pressure sensor is capable of sending an overpressure signal to the controller, and the controller is capable of opening the first pressure relief valve based on the overpressure signal.

[0017] In some embodiments, the oven body is further provided with an installation channel suitable for installing the filter, the installation channel is connected to the filter air duct and extends to the outer peripheral wall of the oven body, and the outer peripheral wall of the oven body is provided with an installation cover for closing the installation channel.

[0018] In some embodiments, the filter is detachably connected to the inner peripheral wall of the filter duct.

[0019] Through the above technical solution, the oven device of this application has the following beneficial technical effects:

[0020] The special test sample is placed in the cavity of the oven body, the preset temperature and preset time are set, and the heating function is started to begin the high-temperature aging test. During the high-temperature aging test, the negative pressure component draws the toxic gas generated by the special test sample from the air inlet of the filter duct and is adsorbed and filtered by the filter in the filter duct, so as to greatly reduce the content of toxic gas in the oven body, thereby reducing the amount of toxic gas generated by the special material sample after the test is completed, and thus avoiding harm to the operator's health.

[0021] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0023] Figure 1 This is a perspective view of the oven apparatus according to a specific embodiment of this application;

[0024] Figure 2 This is a front view of the oven apparatus according to a specific embodiment of this application;

[0025] Figure 3 This is a top view of the oven apparatus according to a specific embodiment of this application.

[0026] Explanation of reference numerals in the attached figures

[0027] 100. Oven assembly; 1. Oven body; 2. Air inlet; 3. Air outlet; 4. First fan; 5. Second fan; 6. Filter cover; 7. First pressure relief channel; 8. Third fan; 9. Second pressure relief channel. Detailed Implementation

[0028] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0029] The terminology of the oven apparatus 100 according to this application is described below with reference to the accompanying drawings.

[0030] like Figure 1 and Figure 2 As shown, a specific embodiment of this application provides an oven device 100, which includes an oven body 1, a filter, and a negative pressure component. The oven body 1 has a receiving cavity and a filter air duct. The air inlet 2 and air outlet 3 of the filter air duct are both disposed on the inner peripheral wall of the oven body 1 and communicate with the receiving cavity. The filter is disposed in the filter air duct. The negative pressure component is disposed in the filter air duct and is used to create negative pressure at the air inlet 2.

[0031] High-temperature aging tests on building materials include a heating step and performance testing. The oven device 100 is mainly used for the heating step, specifically by placing the material sample into the containment cavity of the oven body 1 for heating. For some special material samples that produce toxic gases during the heating process, the toxic gases are drawn into the filter duct through a negative pressure component and adsorbed by a filter to reduce the content of toxic gases in the oven body 1. This avoids the large amount of toxic gases that could harm the operator if the oven body 1 is opened after the heating is completed.

[0032] It should be noted that the oven device 100 is equipped with a heating module for heating, and the oven body 1 is used to open and close the door of the receiving cavity. These technical features are well known to those skilled in the art and are not part of the core improvement of this application, so they will not be described in detail here.

[0033] Optionally, the filter includes an activated carbon filter and a HEPA filter. The structure and principle of the activated carbon filter and the HEPA filter are well known to those skilled in the art and are not part of the core improvement of this application, so they will not be described in detail here. Furthermore, the corresponding filter can be selected according to the composition of the toxic gas to achieve the best absorption effect of the toxic gas.

[0034] In some embodiments, the negative pressure component includes a first fan 4 disposed at the air inlet 2 of the filter duct and a second fan 5 disposed at the air outlet 3 of the filter duct. The first fan 4 is used to draw air from the containment cavity with a high content of toxic gas into the filter duct, and the second fan 5 is used to discharge air with a low content of toxic gas after being treated by the filter to the outside of the containment cavity. In other words, the first fan 4 and the second fan 5 are used to accelerate the speed at which air passes through the filter duct, thereby improving the adsorption efficiency of the filter for toxic gases.

[0035] Optionally, the inner peripheral wall of the oven body 1 is provided with a filter cover 6 for sealing the air inlet 2 and the air outlet 3. The oven device 100 is a general-purpose device for high-temperature aging tests of building materials. It is not only used for heating special building materials that emit toxic gases, but also for ordinary building materials that do not emit toxic gases. Introducing the air from the containment cavity into the filter duct would affect the temperature inside the containment cavity and cause heat loss. Therefore, by setting a filter cover 6 that can seal the air inlet 2 and the air outlet 3, it is beneficial to maintain the heat during high-temperature aging tests of ordinary building materials, thereby ensuring the accuracy of the test results.

[0036] It should be noted that some special building materials need to reach a high temperature before they start to emit toxic gases. Before that, sealing the air inlet 2 and air outlet 3 by the filter cover 6 also helps the temperature inside the containment cavity to quickly reach the preset temperature. After reaching the preset temperature, the filter cover 6 is opened to allow the toxic gases to enter the filter duct for adsorption and filtration. As can be seen, the test efficiency is significantly improved.

[0037] Optionally, the oven device 100 also includes a controller and a flue gas sensor disposed in the receiving cavity. The flue gas sensor is electrically connected to the controller. The filter cover 6 is movable and engaged with the inner peripheral wall of the oven device 100. The oven device 100 also includes a driving component for driving the filter cover 6 to move. The controller is electrically connected to the driving component of the filter cover 6.

[0038] The flue gas sensor can send an alarm signal to the controller when the concentration of toxic gas reaches a preset level. The controller can then activate the drive mechanism based on the alarm signal to rotate the filter cover 6 to a position separated from the air inlet 2 and outlet 3 of the filter duct. The entire process is fully automatic and does not require opening the oven body 1, thus achieving a balance between toxic gas adsorption and filtration and heating rate, thereby improving the reliability of the oven device.

[0039] Preferably, the filter cover 6 is covered with a heat-insulating coating to further reduce the heat entering the filter duct during the heating process, thereby accelerating the heating speed.

[0040] It should be noted that the structure and principle of the driving component that enables the movement of the filter cover 6, the heat insulation coating that enables thermal insulation, and the flue gas sensor and controller that enable the filter start are all well known to those skilled in the art and are not part of the core inventive points of this application, and will not be described in detail here.

[0041] In some embodiments, the oven body 1 is further provided with an installation channel suitable for filter installation. The installation channel is connected to the filter air duct and extends to the outer peripheral wall of the oven body 1. The outer peripheral wall of the oven body 1 is provided with an installation cover for closing the installation channel.

[0042] Specifically, the filter is detachably connected to the inner wall of the filter duct. The filter gradually loses its filtering and adsorption effect after a period of use. The filter is built into the oven body 1, and an installation channel facilitates filter replacement. Different filters can be used depending on the type of toxic gas.

[0043] In some embodiments, the oven body 1 is further provided with a first pressure relief channel 7 that connects to the outside and the receiving cavity. The pressure relief inlet of the first pressure relief channel 7 is provided on the inner peripheral wall of the oven body 1, and the pressure relief outlet of the first pressure relief channel 7 is provided on the outer peripheral wall of the oven body 1. A first pressure relief valve is provided in the first pressure relief channel 7.

[0044] Specifically, when excessive gas expansion occurs inside the oven body 1, causing the air pressure to exceed the preset air pressure, the first pressure relief valve opens to quickly discharge the air in the containment cavity, thereby reducing the air pressure inside the oven body 1 and preventing the oven body 1 from exploding and causing a safety accident.

[0045] Furthermore, when the gas pressure inside the oven body 1 is lower than the preset gas pressure, the first pressure relief valve is closed to prevent the heat of the oven body 1 from being dissipated to the outside through the first pressure relief channel 7, thereby improving the heat preservation effect of the oven body 1 and preventing the heat from flowing out of the oven body 1 and baking the surrounding facilities.

[0046] Optionally, a third fan 8 is provided inside the oven body 1. During the heating process, the third fan 8 rotates to make the air temperature inside the oven body 1 uniform.

[0047] Preferably, the third fan 8 is located at the pressure relief inlet of the first pressure relief channel 7, and the first pressure relief valve is located at the pressure relief outlet. When the gas pressure inside the oven body 1 is lower than the preset pressure, the first pressure relief valve closes to keep the oven body 1 warm, and the third fan 8 rotates to make the temperature of the oven body 1 uniform; when the gas pressure inside the oven body 1 is higher than the preset pressure, the first pressure relief valve opens to allow the gas to be discharged outside the oven body 1 through the first pressure relief channel 7, and the third fan 8 rotates to accelerate the gas discharge speed.

[0048] Optionally, the oven device 100 also includes a controller and a pressure sensor disposed in the containment cavity. The pressure sensor is electrically connected to the controller, and the controller is electrically connected to the first pressure relief valve. The pressure sensor can send an overpressure signal to the controller when the air pressure in the containment cavity reaches a preset pressure, and the controller can open the first pressure relief valve according to the overpressure signal.

[0049] Furthermore, the controller is electrically connected to the heating module. The increase in air pressure may also be caused by excessively high temperature or rapid temperature rise inside the oven body 1. The controller can pause the heating module while opening the first pressure relief valve.

[0050] like Figure 1 and Figure 3 As shown, optionally, a first pressure relief channel 7 is formed on the back of the oven body 1, and a second pressure relief channel 9 is formed on the top of the oven body 1. A second pressure relief valve is provided in the second pressure relief channel 9, and the controller is electrically connected to the second pressure relief valve. The controller can open the second pressure relief valve according to the high pressure signal. Gas is discharged simultaneously through the first pressure relief valve and the second pressure relief valve, thereby quickly reducing the gas pressure inside the oven body 1.

[0051] It should be noted that the structure and working principle of the controller, pressure sensor and pressure relief valve that realize the pressure relief start are well known to those skilled in the art and are not the core inventive points of this application, so they will not be described in detail here.

[0052] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0055] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An oven device, characterized in that, include: The oven body (1) has a receiving cavity and a filter air duct inside. The air inlet (2) and air outlet (3) of the filter air duct are both located on the inner peripheral wall of the oven body (1) and communicate with the receiving cavity. A filter is installed inside the filter duct; A negative pressure component is provided inside the filter duct and is used to create negative pressure at the air inlet (2).

2. Oven device according to claim 1, characterized in that The negative pressure component includes a first fan (4) disposed at the air inlet (2); and / or, A second fan (5) is provided at the air outlet (3).

3. The drying oven apparatus according to claim 1, characterized in that, The inner peripheral wall of the oven body (1) is provided with a filter cover (6) for sealing the air inlet (2) and the air outlet (3).

4. The drying oven apparatus according to claim 3, characterized in that, The oven device (100) also includes a controller and a flue gas sensor disposed in the accommodating cavity. The flue gas sensor is electrically connected to the controller, and the controller is electrically connected to the filter cover (6). The flue gas sensor can send an alarm signal to the controller, and the controller can open the filter cover (6) according to the alarm signal.

5. The drying oven apparatus according to claim 3, characterized in that, The filter cover (6) is covered with a heat-insulating coating.

6. The drying oven apparatus according to claim 1, characterized in that, The oven body (1) also has a first pressure relief channel (7) that connects to the outside and the receiving cavity. The pressure relief inlet of the first pressure relief channel (7) is located on the inner peripheral wall of the oven body (1), and the pressure relief outlet of the first pressure relief channel (7) is located on the outer peripheral wall of the oven body (1). A first pressure relief valve is provided in the first pressure relief channel (7).

7. The drying oven apparatus according to claim 6, characterized in that, The first pressure relief channel (7) is provided with a third fan (8) at the pressure relief inlet, and the first pressure relief valve is provided at the pressure relief outlet.

8. The drying oven apparatus according to claim 6, characterized in that, The oven device (100) further includes a controller and a pressure sensor disposed in the receiving cavity. The pressure sensor is electrically connected to the controller, and the controller is electrically connected to the first pressure relief valve. The pressure sensor can send an overpressure signal to the controller, and the controller can open the first pressure relief valve according to the overpressure signal.

9. The drying oven apparatus according to claim 1, characterized in that, The oven body (1) also has an installation channel suitable for installing the filter. The installation channel is connected to the filter air duct and extends to the outer peripheral wall of the oven body (1). The outer peripheral wall of the oven body (1) is provided with an installation cover for closing the installation channel.

10. The drying oven apparatus according to claim 5, characterized in that, The filter is detachably connected to the inner peripheral wall of the filter duct.

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