Flammability testing device

Abstract

The utility model generally relates to the inspection and detection technology, in particular to a flammability testing device which comprises a sample fixing mechanism used for fixing a sample, a firing mechanism used for conducting flammability testing on the sample and a motion control mechanism used for driving the firing mechanism to move towards the sample so as to conduct the flammability testing. The motion control mechanism is configured to start or stop driving the firing mechanism to move based on the preset torque. Under the condition, the installation problem caused by using the sensor can be reduced, so that the complexity of equipment can be reduced, and the structure of the equipment can be optimized.

Description

Technical Field

[0001] The utility model generally relates to inspection and detection technology, and in particular to a flammability testing device. Background Art

[0002] Electronic and electrical products typically undergo a series of stability and safety tests before leaving the factory, one of which is the glow-wire test. This test involves using a fixed-gauge resistance wire loop (also known as a glow wire) electrically heated to a specified temperature. The tip of the wire is then placed in contact with the sample for a specified period of time, and its behavior is then observed and measured. The scope of the test depends on the specific test procedure.

[0003] In the prior art, in order to drive the tip of the glow wire to accurately contact the sample, a combination of a guide rail and a lead screw is usually used, and various sensors are used to determine whether the glow wire contacts the sample and perform timing operations.

[0004] However, due to the complexity and diversity of test conditions, the installation of various sensors in the prior art requires consideration of the installation location and various thermal insulation protections to ensure the normal operation of the sensors, which increases the complexity of the equipment. Summary of the Invention

[0005] In order to solve the problems in the above background technology, the present invention provides a flammability testing device.

[0006] The solution adopted by the utility model to solve its technical problems is:

[0007] A flammability testing device comprises: a sample fixing mechanism for fixing a sample, a burning mechanism for performing a flammability test on the sample, and a motion control mechanism for driving the burning mechanism to move toward the sample to perform the flammability test, wherein the motion control mechanism is configured to start or stop driving the burning mechanism to move based on a preset torque.

[0008] According to the flammability testing device involved in the present invention, optionally, the motion control mechanism includes a linear guide rail on which the burning mechanism can be mounted, a screw connected to the burning mechanism, and a motor that drives the screw to rotate so that the burning mechanism moves along the guide rail toward the sample, and the motor is configured to start or stop driving the screw to rotate based on the preset torque.

[0009] According to the flammability testing device involved in the present utility model, optionally, the preset torque includes a first preset value, a second preset value and a third preset value. When the preset torque is the first preset value, the motor drives the screw to rotate in the forward direction. When the preset torque is the second preset value, the motor stops driving the screw to rotate. When the preset torque is the third preset value, the motor drives the screw to rotate in the reverse direction.

[0010] According to the flammability testing device involved in the present invention, optionally, it also includes a control system, which is electrically connected to the motor and controls the motor to rotate forward, stop or rotate reversely based on the preset torque.

[0011] According to the flammability testing device involved in the present invention, optionally, the sample fixing mechanism fixes the sample by one of screw fixing, elastic compression fixing and adhesive fixing.

[0012] According to the flammability testing device involved in the present invention, optionally, the burning mechanism includes a burning component, a position adjustment component and a control circuit, the burning component is installed on the position adjustment component, the position adjustment component is configured to adjust the position of the burning component in the horizontal direction or the vertical direction to match the position of the sample, the burning component is electrically connected to the control circuit, and the control circuit is configured to control the burning component to generate a preset burning temperature.

[0013] According to the flammability testing device involved in the present utility model, optionally, the burning component is V-shaped, and the burning component is a nickel wire or a chromium wire.

[0014] According to the flammability testing device involved in the present invention, optionally, it further includes a control system, which is electrically connected to the control circuit and controls the burning component to generate the preset burning temperature based on preset test requirements.

[0015] According to the flammability testing device involved in the present invention, optionally, it further includes a box body, and the sample fixing mechanism, the burning mechanism and the motion control mechanism are located in the box body.

[0016] According to the flammability testing device involved in the present invention, optionally, it also includes an air filtering mechanism and a pneumatic mechanism arranged in the box body, the air filtering mechanism includes a filter screen and a filter disc, and the pneumatic mechanism includes a fan.

[0017] In summary, the beneficial effects of the present invention are as follows:

[0018] 1. Reduce the use of sensors to determine whether the glow wire is in contact with the sample, and instead use the torque of the drive motor itself to determine it. In this case, it is possible to reduce installation problems caused by the use of sensors, thereby reducing the complexity of the equipment and optimizing the equipment structure.

[0019] 2. The motor drives the screw rod, which in turn drives the glow wire to move. Simply increasing the screw rod length can reduce the problem of the sensor needing thermal insulation protection.

[0020] 3. The control system is connected to the control circuit of the motor and the glow wire, and can digitally control the operation of the motor and the work of the glow wire, thereby improving the accuracy of control.

[0021] 4. The box and air filtration mechanism can improve the safety and environmental protection requirements of the flammability test device.

[0022] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In addition, in order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the overall structure of the flammability testing device involved in this embodiment;

[0024] Figure 2 A top view of a portion of the structure of the flammability testing device involved in this embodiment;

[0025] Figure 3 Schematic diagram of a curve showing the change of motor torque over time in this embodiment.

[0026] In the figure: 1…flammability test device; 11…sample fixing mechanism; 12…burning mechanism; 13…motion control mechanism; 14…control system; 15…housing; 121…burning component; 122…position adjustment component; 123…control circuit; 131…guide rail; 132…screw rod; 133…motor; 16…air filtering mechanism; 17…pneumatic mechanism; 2…sample. DETAILED DESCRIPTION

[0027] In order to make the content of the present invention more clearly understood, the present invention will be further described below based on specific embodiments in conjunction with the accompanying drawings.

[0028] It should be noted that the terms "center," "upper," "lower," "front," "back," "left," "right," "inner," and "outer" used herein to indicate positions or locations are based on the positions or locations shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Unless otherwise specified, "plurality" means two or more.

[0029] Unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0030] like Figure 1 As shown, a flammability testing device 1 may include: a sample fixing mechanism 11, a burning mechanism 12, and a motion control mechanism 13. The sample fixing mechanism 11 may be used to fix a sample 2, the burning mechanism 12 may be used to perform a flammability test on the sample 2, and the motion control mechanism 13 may drive the burning mechanism 12 to move toward the sample 2 for the flammability test. The motion control mechanism 13 may be configured to start or stop driving the burning mechanism 12 based on a preset torque.

[0031] In some examples, such as Figure 1 As shown, the motion control mechanism 13 may include a linear guide rail 131 on which the burning mechanism 12 can be mounted, a screw rod 132 connected to the burning mechanism 12, and a motor 133 for driving the screw rod 132 to rotate so that the burning mechanism 12 moves along the guide rail 131 toward the sample 2. The motor 133 can be configured to start or stop driving the screw rod 132 to rotate based on a preset torque.

[0032] In some examples, the preset torque may include a first preset value, a second preset value, and a third preset value. When the preset torque is the first preset value, the motor 133 drives the screw rod 132 to rotate forward. When the preset torque is the second preset value, the motor 133 stops driving the screw rod 132 to rotate. When the preset torque is the third preset value, the motor 133 drives the screw rod 132 to rotate reversely.

[0033] The motor 133 starts or stops driving the screw 132 based on the torque. In other words, the motor 133 can change its operating state based on the torque. The principle of this can be based on existing technologies. For example, the motor 133 itself or the motor 133 is equipped with a torque sensor to continuously obtain the torque of the motor 133 and output the torque to the control system 14 (described later). The control system 14 can determine whether the burning mechanism 12 on the screw 132 contacts the sample 2 based on the torque, thereby controlling the motor 133 to change its operating state.

[0034] like Figure 3As shown, in some examples, the first preset value, the second preset value, and the third preset value may refer to numerical values ​​within a predetermined range. The horizontal axis indicates time (t, unit: seconds (s)), and the vertical axis indicates torque magnitude (since torque, like moment, is directly related to force, it can be indicated by force magnitude (f), unit: Newton (N)). When the preset torque is the first preset value, the motor 133 is started, and the screw 132 drives the burning mechanism 12 to move along the guide rail 131 toward the sample 2; when the movement is, for example, 5 seconds, the torque suddenly increases (due to contact with the sample 2), changing from the first preset value to the second preset value. At this time, the control system 14 can control the motor 133 to stop running and start timing based on this change; when the timing time reaches the preset time, for example, 30 seconds, the torque of the motor 133 is also reduced from the second preset value to the third preset value. At this time, the control system 14 can control the motor 133 to reverse so that the sample 2 is away from the burning mechanism 12, completing the flammability test.

[0035] In some examples, the first preset value is less than the second preset value. In some examples, the third preset value is less than the second preset value. In some examples, the first preset value and the third preset value may be the same.

[0036] In some examples, such as Figure 1 As shown, the flammability testing device 1 further includes a control system 14 , which is electrically connected to the motor 133 and controls the motor 133 to rotate forward, stop, or rotate reversely based on a preset torque.

[0037] In some examples, the sample fixing mechanism 11 can fix the sample 2 by one of screw fixing, elastic compression fixing, and adhesive fixing.

[0038] In some examples, such as Figure 1 As shown in Figure 2, the burning mechanism 12 includes a burning component 121, a position adjustment component 122 and a control circuit 123. The burning component 121 is installed on the position adjustment component 122. The position adjustment component 122 is configured to adjust the position of the burning component 121 in the horizontal direction or the vertical direction to match the position of the sample 2. The burning component 121 is electrically connected to the control circuit 123, and the control circuit 123 is configured to control the burning component 121 to generate a preset burning temperature.

[0039] In some examples, such as Figure 2 As shown, the burning component 121 is V-shaped and is made of nickel wire or chromium wire.

[0040] In some examples, such as Figure 1As shown, the flammability testing device 1 further includes a control system 14, which is electrically connected to the control circuit 123 and controls the burning component to generate a preset burning temperature based on preset test requirements. In some examples, the control system 14 may include a control panel, control buttons, and a display.

[0041] In some examples, such as Figure 1 As shown, the flammability testing device 1 further includes a box 15 , in which the sample fixing mechanism 11 , the burning mechanism 12 and the motion control mechanism 13 are located.

[0042] In some examples, such as Figure 1 As shown, the flammability testing device 1 further includes an air filter mechanism 16 and a pneumatic mechanism 17 disposed in the box 15 . The air filter mechanism 16 includes a filter screen and a filter disc, and the pneumatic mechanism 17 includes a fan.

[0043] In summary, the beneficial effects of the present invention are as follows:

[0044] First, the need to use sensors to determine whether the glow-wire is in contact with the sample 2 is reduced, and instead the torque of the drive motor 133 itself is used to determine the contact. In this case, the installation problems caused by the use of sensors can be reduced, thereby reducing the complexity of the equipment and optimizing the equipment structure. Secondly, the motor 133 drives the screw 132, which in turn drives the glow-wire to move. By simply increasing the length of the screw 132, the problem of the sensor requiring thermal insulation protection can be reduced. In addition, the control system 14 is connected to the motor 133 and the glow-wire control circuit 123, and can digitally control the operation of the motor 133 and the operation of the glow-wire, thereby improving the accuracy of the control. The box 15 and the air filter mechanism 16 can improve the safety and environmental protection requirements of the flammability test device 1.

[0045] The embodiments described above are only preferred implementation methods of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and modifications made by technicians in this field on the basis of the utility model shall fall within the scope of protection of the present invention.

Claims

1. A flammability testing device, characterized in that: include: A sample fixing mechanism for fixing a sample, a burning mechanism for performing a flammability test on the sample, and a motion control mechanism for driving the burning mechanism to move toward the sample for performing the flammability test, wherein the motion control mechanism is configured to start or stop driving the burning mechanism to move based on a preset torque.

2. The flammability testing device according to claim 1, characterized in that: The motion control mechanism includes a linear guide rail on which the burning mechanism can be mounted, a lead screw connected to the burning mechanism, and a motor that drives the lead screw to rotate so that the burning mechanism moves along the guide rail toward the sample. The motor is configured to start or stop driving the lead screw to rotate based on the preset torque.

3. The flammability testing device according to claim 2, characterized in that: The preset torque includes a first preset value, a second preset value and a third preset value. When the preset torque is the first preset value, the motor drives the screw rod to rotate in the forward direction. When the preset torque is the second preset value, the motor stops driving the screw rod to rotate. When the preset torque is the third preset value, the motor drives the screw rod to rotate in the reverse direction.

4. The flammability testing device according to claim 3, characterized in that: The system further includes a control system electrically connected to the motor and configured to control the motor to rotate forward, stop, or rotate reversely based on the preset torque.

5. The flammability testing device according to claim 1, characterized in that: The sample fixing mechanism fixes the sample by one of screw fixing, elastic compression fixing and adhesive fixing.

6. The flammability testing device according to claim 1, characterized in that: The burning mechanism includes a burning component, a position adjustment component and a control circuit. The burning component is installed on the position adjustment component. The position adjustment component is configured to adjust the position of the burning component in the horizontal direction or the vertical direction to match the position of the sample. The burning component is electrically connected to the control circuit, and the control circuit is configured to control the burning component to generate a preset burning temperature.

7. The flammability testing device according to claim 6, characterized in that: The burning component is V-shaped and is a nickel wire or a chromium wire.

8. The flammability testing device according to claim 6, characterized in that: The system further includes a control system electrically connected to the control circuit and configured to control the burning component to generate the preset burning temperature based on preset test requirements.

9. The flammability testing device according to claim 1, characterized in that: It also includes a box body, in which the sample fixing mechanism, the burning mechanism and the motion control mechanism are located.

10. The flammability testing device according to claim 9, characterized in that: It also includes an air filtering mechanism and a pneumatic mechanism arranged on the box body, the air filtering mechanism includes a filter screen and a filter sheet, and the pneumatic mechanism includes a fan.

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