Safe and intelligent drying oven for drying nitrocellulose samples and drying method for nitrocellulose samples

Abstract

This invention discloses a safe and intelligent drying oven for drying nitrocellulose samples. The oven includes a main body with a camera connected inside. Acid-base test strips are placed inside the oven, with the camera facing the test strips. The camera is connected to a processor, which in turn is connected to a PLC controller and an oven power switch. The PLC controller is connected to an electric cylinder, which is fixedly connected to the oven door. The oven power switch is also connected to the main body. The invention incorporates a cylinder, video monitoring and recognition, and remote temperature transmission. It also employs automated control with dual protection from video monitoring and thermocouples, achieving automated control of the nitrocellulose sample drying process. Operators only need to place and remove aluminum boxes containing samples from the oven tray. This method for drying nitrocellulose samples reduces the labor intensity of operators and lowers the safety risk of oven explosions.

Description

Technical Field

[0001] This invention belongs to the technical field of nitrocellulose drying equipment, specifically relating to a safe and intelligent drying oven for drying nitrocellulose samples, and also to a method for drying nitrocellulose samples. Background Technology

[0002] Currently, during the drying process of nitrocellulose samples, operators need to observe the oven temperature and the color of the test paper placed above the sample every 20 minutes. This process involves high frequency of operation and carries certain safety risks. If the dried nitrocellulose sample is unstable, and heating is not stopped promptly after the test paper changes color, the nitrocellulose sample may decompose and explode. If the oven temperature control system malfunctions, the oven temperature may continue to rise, causing the nitrocellulose sample to decompose and explode. Summary of the Invention

[0003] The first objective of this invention is to provide a safe and intelligent drying oven for drying nitrocellulose samples, which enables automated control of the drying process.

[0004] The second objective of this invention is to provide a method for drying nitrocellulose samples that can reduce the labor intensity of operators and decrease the safety risk of oven explosion.

[0005] The first technical solution adopted in this invention is a safe and intelligent drying oven for drying nitrocellulose samples, including an oven body, a camera connected inside the oven body, acid and alkali test paper placed inside the oven body, the camera facing the acid and alkali test paper, the camera connected to a processor, the processor connected to a PLC controller and an oven power switch, the PLC controller connected to an electric cylinder, the electric cylinder fixedly connected to the oven door of the oven body, and the oven power switch connected to the oven body.

[0006] The processor is used to identify the color image input from the camera. When the color image is red, the processor inputs a control command to disconnect the oven power supply switch and controls the electric cylinder to open the oven door via the PLC controller.

[0007] The oven body is also connected to a thermocouple, which is connected to the processor.

[0008] The processor receives temperature information from the thermocouple. When the temperature exceeds a certain set value, it inputs a control command to disconnect the oven power supply switch and controls the electric cylinder to open the oven door via the PLC controller.

[0009] The processor is connected to the monitor.

[0010] The acid-base test paper is blue litmus paper.

[0011] The second technical solution adopted in this invention is a method for drying nitrocellulose samples, using a safe and intelligent drying oven for drying nitrocellulose samples, specifically implemented according to the following steps:

[0012] Step 1: Place the nitrocellulose sample to be dried inside the oven, and place the acid-base test paper on top of the nitrocellulose sample. Capture the image information of the acid-base test paper using a camera and transmit the image information to the processor.

[0013] Step 2: Determine whether the image information has turned red within the processor. If it has turned red, input a control command to disconnect the oven power supply switch and control the electric cylinder to open the oven door via the PLC controller. Otherwise, continue to collect acid-base test paper image information.

[0014] The oven body is also connected to a thermocouple, which is connected to a processor. The drying method also includes: setting a temperature threshold, measuring temperature information through the thermocouple, transmitting the temperature information to the processor, and when the temperature is higher than the temperature threshold, inputting a control command to disconnect the oven power supply switch, and controlling the electric cylinder to open the oven door through the PLC controller.

[0015] The beneficial effects of this invention are:

[0016] This invention relates to a safe and intelligent drying oven for drying nitrocellulose samples. It adds cylinders, video monitoring and recognition, and remote temperature transmission. At the same time, it adopts automated control with the participation of video monitoring and thermocouples for dual protection, so as to realize the automated control of the drying process of nitrocellulose samples. Operators only need to place and remove aluminum boxes containing samples from the drying oven tray.

[0017] The present invention provides a method for drying nitrocellulose samples, which reduces the labor intensity of operators and reduces the safety risk of oven explosion. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of the safe intelligent drying oven for drying nitrocellulose samples according to the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the safe intelligent drying oven for drying nitrocellulose samples according to the present invention.

[0020] In the diagram, 1. Oven body, 2. Camera, 3. Acid-base test paper, 4. Processor, 5. PLC controller, 6. Electric cylinder, 7. Thermocouple, 8. Oven power switch. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0022] Example 1

[0023] This invention relates to a safe and intelligent drying oven for drying nitrocellulose samples. It redesigns existing ovens by adding cylinders, video monitoring and recognition, and remote temperature transmission. Simultaneously, it employs automated control with dual protection of video monitoring and thermocouples, achieving automated control of the nitrocellulose sample drying process. Operators only need to place and remove aluminum boxes containing samples from the oven tray, reducing operator workload and minimizing the risk of oven explosion. Figure 1 , Figure 2 As shown, the oven includes an oven body 1, a camera 2 connected inside the oven body 1, and acid-base test paper 3 (blue litmus paper that turns red upon contact with acid) placed inside the oven body 1. The camera 2 is positioned directly opposite the acid-base test paper 3. The camera 2 is connected to a processor 4, which in turn is connected to a PLC controller 5 and an oven power switch 8. The PLC controller 5 is connected to an electric cylinder 6, which is fixedly connected to the door of the oven body 1. The oven power switch 8 is connected to the oven body 1. A nitrocellulose sample is placed in an aluminum box on a tray, and the tray is placed inside the oven body 1. The acid-base test paper 3 is placed on the nitrocellulose sample. The camera 2 captures the image information of the acid-base test paper 3 and transmits the image information to the processor 4. The processor 4 identifies the color image input by the camera 2. When the color image is red, it inputs a control command to disconnect the oven power switch 8 and controls the electric cylinder 6 via the PLC controller 5 to open the oven door of the oven body 1, sending the aluminum box on the tray out of the oven and stopping the heating of the nitrocellulose sample.

[0024] Example 2

[0025] In this embodiment, a thermocouple 7 is also connected inside the oven body 1, and the thermocouple 7 is connected to the processor 4. The thermocouple 7 is used to measure the temperature information inside the oven body 1 and transmit the temperature information to the processor 4. When the temperature is higher than a certain set value, a control command is input to disconnect the oven power supply switch 8, and the electric cylinder 6 is controlled by the PLC controller 5 to open the oven door of the oven body 1, sending the aluminum box placed on the tray out of the oven body 1 and stopping the heating of the nitrocellulose sample.

[0026] Example 3

[0027] In this embodiment, the processor 4 is connected to the display 9 to display a real-time video of the color change of the blue litmus paper placed on the nitrocellulose sample, and the temperature display area is used to display the real-time temperature inside the oven.

[0028] Example 4

[0029] In this embodiment, the drying method for nitrocellulose samples uses a safe and intelligent drying oven for drying nitrocellulose samples, and is implemented according to the following steps:

[0030] Image recognition: Place the nitrocellulose sample in an aluminum box on a tray, place the tray inside the oven body 1, and place the acid-base test paper 3 on top of the nitrocellulose sample to be dried. The camera 2 captures the image information of the acid-base test paper 3 and transmits the image information to the processor 4. The processor 4 determines whether the image information has turned red. If it has turned red, the control command is input to disconnect the oven power switch 8, and the electric cylinder 6 is controlled by the PLC controller 5 to open the oven door of the oven body 1. Otherwise, the image information of the acid-base test paper 3 continues to be captured, the aluminum box placed on the tray is sent out of the oven, and the heating of the nitrocellulose sample is stopped.

[0031] Temperature control: The oven body 1 is also connected to a thermocouple 7, which is connected to a processor 4. The drying method also includes: setting a temperature threshold, measuring temperature information through the thermocouple 7, and transmitting the temperature information to the processor 4. When the temperature is higher than the temperature threshold, a control command is input to disconnect the oven power supply switch 8, and the electric cylinder 6 is controlled by the PLC controller 5 to open the oven door of the oven body 1, so that the aluminum box placed on the tray is sent out of the oven and the heating of the nitrocellulose sample is stopped.

[0032] The present invention provides a method for drying nitrocellulose samples, which automates the drying process. Operators only need to place and remove aluminum boxes containing samples from the oven tray, reducing the labor intensity of operators and the safety risk of oven explosion.

[0033] The working principle of the safe and intelligent drying oven for drying nitrocellulose samples of this invention is as follows:

[0034] Each drying oven is equipped with a camera to monitor the interior. When the test paper inside the oven turns red, a signal is sent. The PLC receives the signal and controls the electric cylinder to open the oven door. Afterward, the staff removes the nitrocellulose sample from the tray and presses the reset button to close the door.

[0035] The temperature measurement system uses thermocouples to monitor the internal temperature of the oven in real time. When the temperature inside the oven exceeds the limit, the PLC-controlled electric cylinder opens the oven door. Afterwards, the operator removes the nitrocellulose sample from the tray and presses the reset button to close the door.

[0036] Through the above methods, the safe and intelligent drying oven for drying nitrocellulose samples of this invention adds cylinders, video monitoring and recognition, and remote temperature transmission. Simultaneously, it employs automated control with dual protection of video monitoring and thermocouples, achieving automated control of the nitrocellulose sample drying process. Operators only need to place and remove aluminum boxes containing samples from the oven tray. This method of drying nitrocellulose samples reduces the labor intensity of operators and lowers the safety risk of oven explosion.

Claims

1. A safe and intelligent oven for drying samples of nitrocellulose, characterized in that, The application relates to a safe and intelligent oven for drying a nitrocellulose sample, which comprises an oven body (1), a camera (2) connected in the oven body (1), acid-base test paper (3) arranged in the oven body (1), the camera (2) facing the acid-base test paper (3), the camera (2) being connected with a processor (4), the processor (4) being connected with a PLC controller (5) and an oven power supply switch (8), the PLC controller (5) being connected with an electric cylinder (6), the electric cylinder (6) being fixedly connected with a door of the oven body (1), and the oven power supply switch (8) being connected with the oven body (1). The processor (4) is used for identifying color images input by the camera (2), when the color images are red, the oven power supply switch (8) is disconnected through input control instructions, and the electric cylinder (6) is controlled to open the door of the oven body (1) through the PLC controller (5). The oven body (1) is further connected with a thermocouple (7), and the thermocouple (7) is connected with the processor (4). The acid-base test paper (3) is blue litmus paper. The processor (4) is used for receiving temperature information measured by the thermocouple (7), when the temperature is higher than a certain set value, the oven power supply switch (8) is disconnected through input control instructions, and the electric cylinder (6) is controlled to open the door of the oven body (1) through the PLC controller (5).

2. The safety intelligent oven for drying nitrocellulose samples according to claim 1, characterized in that, The processor (4) is connected with a display (9).

3. A method of drying a sample of nitrocellulose, characterised in that, The safe and intelligent oven for drying a nitrocellulose sample is characterized in that the following steps are specifically implemented: Step 1: placing a nitrocellulose sample to be dried in the oven body (1), placing acid-base test paper (3) on the nitrocellulose sample to be dried, collecting image information of the acid-base test paper (3) through the camera (2), and transmitting the image information to the processor (4); Step 2: judging whether the image information is red in the processor (4), if the image information is red, disconnecting the oven power supply switch (8) through input control instructions, and opening the door of the oven body (1) through the PLC controller (5) and the electric cylinder (6), otherwise, continuously collecting image information of the acid-base test paper (3).

4. The method of drying nitrocellulose samples according to claim 3, wherein, The drying method further comprises the following steps: setting a temperature threshold, measuring temperature information through the thermocouple (7), and transmitting the temperature information to the processor (4), when the temperature is higher than the temperature threshold, disconnecting the oven power supply switch (8) through input control instructions, and opening the door of the oven body (1) through the PLC controller (5) and the electric cylinder (6).

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