Dangerous gas detection device

Abstract

The invention provides a hazardous gas detection device which comprises a sampling pipe arranged in the vertical direction, a heating device arranged in the sampling pipe and configured to heat gas at the lower part in the sampling pipe and enable hazardous gas below the sampling pipe to flow upwards along the sampling pipe by utilizing the chimney effect; the detection device is arranged on the inner wall of the sampling pipe and comprises a gas detection part, and the gas detection part is configured to detect flowing hazardous gas; and the processing device is arranged outside the sampling pipe and connected with the detection device, and the processing device is configured to calculate parameters of the hazardous gas based on a detection result of the gas detection part.

Description

Technical Field

[0001] The present invention relates to the technical field of gas detection, and in particular to a dangerous gas detection device. Background Art

[0002] Dangerous gases such as NMP (N-methyl-2-pyrrolidone) gas, ammonia gas, and methyl chloride gas have the characteristics of high boiling point, strong solubility, and good thermal stability. They are often used in the chemical, pharmaceutical, and plastic industries. For example, they are often used as solvents for extraction, dissolution, and polymerization reactions, as well as cleaning agents for electronic components. Since dangerous gases are flammable and explosive, it is of great significance to safe production to detect them through effective measures.

[0003] In order to meet the requirements of explosion-proof occasions, the hazardous gas detection device of the related art adopts the air intake sampling method and the pump suction sampling method. However, the air intake sampling method has the disadvantage of slow response speed, and the pump suction sampling method has the disadvantage of high cost and high maintenance cost. Summary of the invention

[0004] In view of this, the present invention provides a dangerous gas detection device, comprising: a sampling tube, arranged in a vertical direction, a heating device is arranged in the sampling tube, the heating device is configured to heat the gas in the lower part of the sampling tube, and utilizes the chimney effect to make the dangerous gas below the sampling tube flow upward along the sampling tube; a detection device, arranged on the inner wall of the sampling tube, the detection device includes a gas detection unit, and the gas detection unit is configured to detect the flowing dangerous gas; a processing device, arranged outside the sampling tube and connected to the detection device, the processing device is configured to calculate the parameters of the dangerous gas based on the detection result of the gas detection unit.

[0005] Optionally, the detection device further includes: a temperature detection unit configured to detect the temperature of the heating device, and the processing device controls the heating device to heat based on the temperature detected by the temperature detection unit.

[0006] Optionally, there is one heating device, which is arranged at the bottom end of the sampling tube.

[0007] Optionally, there are multiple heating devices, which are arranged at intervals along the axial direction of the sampling tube.

[0008] Optionally, the temperature of the heating device close to the air inlet is lower than the temperature of the heating device far from the air inlet.

[0009] Optionally, the heating device is configured in a ring shape.

[0010] Optionally, the heating device is disposed between the air inlet and the detection device and is close to the gas detection portion, and in response to heating by the heating device, a high temperature area is formed between the air inlet and the detection device.

[0011] Optionally, the sampling tube includes: a sampling tube body; an upper pressure cover, which is sleeved on the sampling tube body and has an air outlet; and a lower pressure cover, which is sleeved on a side of the sampling tube body away from the upper pressure cover and has an air inlet.

[0012] Optionally, an explosion-proof net is provided between the sampling tube body and the upper pressure cover, and an explosion-proof net is provided between the sampling tube body and the lower pressure cover.

[0013] Optionally, the hazardous gas detection device further includes: a transition section, the sampling tube is connected to the gas device through the transition section, and the transition section is configured to be funnel-shaped.

[0014] According to the embodiment of the present disclosure, by arranging a heating device in the sampling tube, a chimney effect can be formed in the sampling tube, so that the chimney effect can be utilized to make the dangerous gas below the sampling tube flow upward along the sampling tube, accelerate the air exchange of the sampling tube, and improve the sampling efficiency of the dangerous gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0016] Figure 1 A side view of a hazardous gas detection device according to an embodiment of the present invention is schematically shown.

[0017] Figure 2 A cross-sectional view of a sampling tube according to an embodiment of the present invention is schematically shown.

[0018] Figure 3 A cross-sectional view of a sampling tube according to another embodiment of the present invention is schematically shown.

[0019] Figure 4 A cross-sectional view of a sampling tube according to yet another embodiment of the present invention is schematically shown.

[0020] Figure 5 The working principle diagram of the core mainboard according to an embodiment of the present invention is schematically shown.

[0021] Reference numerals

[0022] 1. Sampling tube; 11. Sampling tube body; 12. Upper pressure cover; 13. Lower pressure cover; 2. Heating device; 3. Detection device; 31. Gas detection unit; 32. Temperature detection unit; 4. Processing device; 41. Main unit housing; 42. Sound and light alarm; 43. Infrared receiver; 44. Liquid crystal display; 45. Normal indicator light; 46. Fault indicator light; 47. Alarm indicator light; 48. Explosion-proof inlet pipe; 49. Explosion-proof outlet pipe; 50. Core motherboard; 501. Infrared receiving circuit; 502. Power conversion circuit; 503. Sound and light alarm circuit; 504. Heating device control circuit; 505. Temperature and humidity sensor circuit; 506. Liquid crystal display circuit; 507. Indicator light circuit; 508. Sensor processing circuit; 509. Relay control circuit; 510. Communication circuit; 511. Storage circuit; 512. CPU processing circuit; 5. Explosion-proof net; 6. Transition section; 7. Sampling tube connector. DETAILED DESCRIPTION

[0023] Below, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of embodiments of the present invention. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of concepts of the present invention.

[0024] The terms used herein are only for describing specific embodiments and are not intended to limit the present invention. The terms "comprise", "include", etc. used herein indicate the existence of features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0025] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0026] When using expressions such as "at least one of A, B, and C, etc.", they should generally be interpreted according to the meaning of the expression commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0027] In order to meet the requirements of explosion-proof occasions, the hazardous gas detection device of the related art adopts the air intake sampling method and the pump suction sampling method. However, the air intake sampling method has the disadvantage of slow response speed, and the pump suction sampling method has the disadvantage of high cost and high maintenance cost.

[0028] In response to the above problems, an embodiment of the present disclosure provides a hazardous gas detection device, comprising: a sampling tube, arranged in a vertical direction, a heating device being arranged in the sampling tube, the heating device being configured to heat the gas in the lower part of the sampling tube, and utilizing the chimney effect to make the hazardous gas below the sampling tube flow upward along the sampling tube; a detection device, arranged on the inner wall of the sampling tube, the detection device comprising a gas detection unit, the gas detection unit being configured to detect the flowing hazardous gas; a processing device, arranged outside the sampling tube and connected to the detection device, the processing device being configured to calculate the parameters of the hazardous gas based on the detection result of the gas detection unit.

[0029] Figure 1 A side view of a hazardous gas detection device according to an embodiment of the present invention is schematically shown. Figure 2 A cross-sectional view of a sampling tube according to an embodiment of the present invention is schematically shown.

[0030] like Figure 1 As shown, an embodiment of the present disclosure provides a dangerous gas detection device. The dangerous gas detection device may include a sampling tube 1, a detection device 3 and a processing device 4. The sampling tube 1 may be arranged in a vertical direction on a gas device for containing dangerous gases. The sampling tube 1 may be connected to the gas device. A heating device 2 may be arranged in the sampling tube 1. The heating device 2 may be used to heat the gas in the lower part of the sampling tube 1 so that the gas flows upward to form a chimney effect. Thus, the chimney effect may be used to make the dangerous gas below the sampling tube 1 flow upward along the sampling tube 1. The detection device 3 may be arranged on the inner wall of the sampling tube 1. The detection device 3 may include a gas detection unit 31. The gas detection unit 31 may be a gas sensor. A plurality of gas sensors may be arranged according to the type of dangerous gas to be detected. After the dangerous gas flows upward along the sampling tube 1 until the dangerous gas flows upward along the sampling tube 1, the gas detection unit 31 may be used to detect the flowing dangerous gas. The processing device 4 may be arranged outside the sampling tube 1 and connected to the detection device 3. The processing device 4 may be used to calculate the parameters of the dangerous gas based on the detection result of the gas detection unit 31.

[0031] According to the embodiment of the present disclosure, by arranging a heating device 2 in the sampling tube 1, a chimney effect can be formed in the sampling tube 1, so that the chimney effect can be utilized to make the dangerous gas below the sampling tube 1 flow upward along the sampling tube 1, thereby accelerating the air exchange of the sampling tube 1 and improving the sampling efficiency of the dangerous gas.

[0032] In some embodiments, the detection device 3 may further include a temperature detection unit 32. The temperature detection unit 32 may be used to detect the temperature of the heating device 2. The processing device 4 controls the heating of the heating device 2 based on the temperature detected by the temperature detection unit 32 to ensure that the chimney effect is continuously formed. The temperature detection unit 32 may be a temperature and humidity sensor, and the temperature detection unit 32 may also be used to detect the humidity of the dangerous gas to compensate for the parameters of the dangerous gas.

[0033] like Figure 2 As shown, in some embodiments, the heating device 2 can be set as one. The heating device 2 can be set at the bottom end of the sampling tube 1, that is, close to the position of the gas device, so that dangerous gas can be obtained more quickly.

[0034] Figure 3 A cross-sectional view of a sampling tube according to another embodiment of the present invention is schematically shown.

[0035] like Figure 3 As shown, in some embodiments, the heating device 2 can be provided in plurality. The plurality of heating devices 2 can be arranged at intervals along the axial direction of the sampling tube 1, so that the temperature in the sampling tube 1 can be higher than the temperature in the gas device, so that the dangerous gas can always maintain a high flow rate, accelerate the gas exchange rate, and improve the detection efficiency.

[0036] In some embodiments, the temperature of the heating device 2 near the air inlet is lower than the temperature of the heating device 2 far from the air inlet, thereby further maintaining a high flow rate of the hazardous gas, accelerating the gas exchange rate, and improving the detection efficiency.

[0037] In some embodiments, the heating device 2 can be constructed in a ring shape to make the temperature of the sampling tube 1 uniform in the circumferential direction, thereby ensuring that the hazardous gas can flow into the sampling tube 1 in a relatively stable manner.

[0038] Figure 4 A cross-sectional view of a sampling tube according to yet another embodiment of the present invention is schematically shown.

[0039] like Figure 4 As shown, in some embodiments, the heating device 2 can be arranged between the air inlet and the detection device 3 and close to the gas detection part 31. In response to the heating of the heating device 2, a high-temperature area can be formed between the air inlet and the detection device 3, thereby ensuring the speed at which the dangerous gas flows through the gas detection part 31 and improving the detection accuracy of the gas detection part 31.

[0040] like Figure 1As shown, in some embodiments, the sampling tube 1 may include a sampling tube body 11, an upper gland 12 and a lower gland 13. The upper gland 12 may be sleeved on the sampling tube body 11, and an air outlet may be formed on the upper gland 12, and the air outlet may be located at the upper end of the upper gland 12. The lower gland 13 may be sleeved on the side of the sampling tube body 11 away from the upper gland 12, that is, sleeved on the lower end of the sampling tube body 11, and an air inlet may be formed on the lower gland 13, and the air inlet may be located at the lower end of the lower gland 13.

[0041] Furthermore, a plurality of slots for installing the heating device 2 may be provided inside the sampling tube body 11 .

[0042] In some embodiments, an explosion-proof net 5 may be provided between the sampling tube body 11 and the upper gland 12. An explosion-proof net 5 may be provided between the sampling tube body 11 and the lower gland 13, that is, an explosion-proof net 5 may be provided near the air inlet and the air outlet, so as to isolate explosions and prevent mosquitoes, thereby meeting the installation requirements of an explosion-proof environment.

[0043] In some embodiments, the hazardous gas detection device may further include a transition section 6. The sampling tube 1 is connected to the gas device through the transition section 6. The transition section 6 may be configured to be funnel-shaped. The funnel-shaped transition section 6 may be used to store part of the hazardous gas to ensure that sufficient hazardous gas flows into the sampling tube 1, thereby increasing the speed at which the hazardous gas flows into the sampling tube 1.

[0044] In some embodiments, the processing device 4 can be connected to the sampling tube 1 through the sampling tube 1 connector. The processing device 4 may include a host housing 41, an audible and visual alarm 42, an infrared receiver 43, a liquid crystal display 44, a normal indicator light 45, a fault indicator light 46, an alarm indicator light 47, a core mainboard 50, an explosion-proof inlet pipe 48 and an explosion-proof outlet pipe 49. The core mainboard 50 can be installed inside the host housing 41, and the core mainboard 50 can be used to calculate the parameters of the hazardous gas based on the detection results of the gas detection unit 31. The parameters of the hazardous gas may include the type, concentration and humidity of the hazardous gas. The core mainboard 50 also has the functions of processing all signals, data recording, alarm judgment, data storage, alarm output, data communication and heating control. The signal may include an infrared remote control signal received by the infrared receiver 43. The core mainboard 50 may also be connected to a relay, and the core mainboard 50 may use the relay to control the opening or closing of equipment such as exhaust fans and valves according to the parameters of the hazardous gas. The working time recording function of the sensor can be used to realize the automatic reminder of the later maintenance, thereby improving the convenience and reliability of the maintenance of the hazardous gas detection device. By recording historical data, it is convenient for later data query to be used for tracking, and to help staff analyze the reasons for exceeding the limit. The sound and light alarm 42 can be connected to the core mainboard 50 and installed on the mainframe housing 41. When the concentration of the dangerous gas exceeds the preset concentration, the sound and light alarm 42 can make a sound and light alarm to remind the on-site staff to handle it. The liquid crystal display 44 can be connected to the core mainboard 50 and installed on the mainframe housing 41. The liquid crystal display 44 can be used to display the parameters of the dangerous gas, and facilitate the operator to interactively control the dangerous gas detection device, query historical data, etc. The infrared receiver 43 is connected to the core mainboard 50. The infrared receiver 43 can be used to receive signals from the infrared remote control, which is beneficial for the operator to remotely control the dangerous gas detection device. The normal indicator light 45, the fault indicator light 46 and the alarm indicator light 47 are respectively connected to the mainboard and installed on the mainframe housing 41 to intuitively display the working status of the dangerous gas detection device.

[0045] Figure 5 The working principle diagram of the core mainboard according to an embodiment of the present invention is schematically shown.

[0046] like Figure 5As shown, the core motherboard 50 includes an infrared receiving circuit 501, a power conversion circuit 502, an audible and visual alarm circuit 503, a heating device control circuit 504, a temperature and humidity sensor circuit 505, a liquid crystal display circuit 506, an indicator light circuit 507, a sensor processing circuit 508, a relay control circuit 509, a communication circuit 510, a storage circuit 511 and a CPU processing circuit 512. The infrared receiving circuit 501 can be used to provide a stable power supply for the infrared receiver 43, and transmit the received infrared signal to the CPU processing circuit 512 for decoding processing to obtain the corresponding key value. The power conversion circuit 502 can be used to convert the external power supply into the power supply required by each circuit to ensure the normal operation of the system. The audible and visual alarm circuit 503 can be used to receive the control signal of the CPU processing circuit 512 to drive the audible and visual alarm 42 to work, ensuring the normal operation of the alarm. The heating device control circuit 504 can be used to receive the control signal of the CPU processing circuit 512 to drive the heating device 2 to work, ensuring the stable operation of the heating device 2. The temperature and humidity sensor circuit 505 can be used to process the temperature and humidity sensor signal and transmit it to the CPU processing circuit 512 for processing. The liquid crystal display circuit 506 can be used to receive the display signal of the CPU processing circuit 512 and transmit it to the liquid crystal display 44 for display. The indicator light circuit 507 can be used to receive the control signal of the CPU processing circuit 512 and light up the corresponding status indicator light. The status indicator light can include a normal indicator light 45, a fault indicator light 46 and an alarm indicator light 47. The sensor processing circuit 508 can be used to amplify and filter the signal from the gas sensor and transmit it to the sensor signal that can be recognized by the CPU processing circuit 512, so as to facilitate CPU processing. The relay control circuit 509 can be used to receive the control signal of the CPU processing circuit 512 to control the alarm relay action and provide working signals for other linkage devices. The communication circuit 510 can be used to transmit the data of the CPU processing circuit 512 to other devices such as an alarm host or a computer, so as to facilitate the network control of the equipment. The storage circuit 511 can be used to record and save the data of the CPU processing circuit 512 for later viewing. The CPU processing circuit 512 can be used to process the signals of the infrared receiving circuit 501, the temperature and humidity sensor circuit 505 and the sensor processing circuit 508, and at the same time control the display of the liquid crystal display circuit 506, control the operation of the sound and light alarm circuit 503, the heating device control circuit 504, the indicator light circuit 507 and the relay control circuit 509, store the processed data through the storage circuit 511, and connect to other devices through the communication circuit 510.

[0047] According to an embodiment of the present disclosure, the working process of the hazardous gas detection device may be as follows.

[0048] Step 1: The hazardous gas detection device is initialized and various parameters of the hazardous gas detection device are set to predetermined parameters.

[0049] Step 2: Perform self-test of the hazardous gas detection device. The self-test content includes storage self-test, alarm self-test, sampling self-test and display self-test. If the self-test is abnormal, the fault indicator light 46 is turned on. If the self-test is normal, the temperature and humidity data are collected.

[0050] Step 3: When the temperature reaches the preset temperature, the gas detection unit 31 is used to collect dangerous gases.

[0051] Step 4: Record the parameters of the dangerous gas, start the sound and light alarm 42 when the concentration of the dangerous gas reaches the alarm setting value, and use the relay to control the exhaust fan to turn on.

[0052] According to the embodiment of the present disclosure, the core motherboard 50 can record the working time of the sensor. When the working time of the sensor reaches the service life of the sensor, the LCD display 44 shows that the sensor needs to be replaced. After the sensor is replaced, the working time of the sensor is reset.

[0053] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

[0054] The embodiments of the present invention are described above. However, these embodiments are only for the purpose of illustration, and are not intended to limit the scope of the present invention. Although each embodiment is described above, it does not mean that the measures in each embodiment cannot be used in combination. The scope of the present invention is defined by the attached claims and their equivalents. Without departing from the scope of the present invention, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present invention.

Claims

1. A dangerous gas detection device, characterized in that: include: A sampling tube is arranged in a vertical direction, wherein a heating device is arranged in the sampling tube, wherein the heating device is configured to heat the gas in the lower part of the sampling tube, and utilize the chimney effect to make the dangerous gas under the sampling tube flow upward along the sampling tube; A detection device, disposed on the inner wall of the sampling tube, the detection device comprising a gas detection unit, the gas detection unit being configured to detect the flowing dangerous gas; The processing device is arranged outside the sampling tube and connected to the detection device. The processing device is configured to calculate the parameters of the dangerous gas based on the detection result of the gas detection unit.

2. The hazardous gas detection device according to claim 1, characterized in that: The detection device also includes: The temperature detection unit is configured to detect the temperature of the heating device, and the processing device controls the heating device to heat based on the temperature detected by the temperature detection unit.

3. The hazardous gas detection device according to claim 1, characterized in that: There is one heating device, which is arranged at the bottom end of the sampling tube.

4. The hazardous gas detection device according to claim 1, characterized in that: There are multiple heating devices, which are arranged at intervals along the axial direction of the sampling tube.

5. The hazardous gas detection device according to claim 4, characterized in that: The temperature of the heating device close to the air inlet is lower than the temperature of the heating device far from the air inlet.

6. The hazardous gas detection device according to claim 1, characterized in that: The heating device is configured in a ring shape.

7. The hazardous gas detection device according to claim 6, characterized in that: The heating device is disposed between the air inlet and the detection device and is close to the gas detection portion. In response to heating by the heating device, a high temperature area is formed between the air inlet and the detection device.

8. The hazardous gas detection device according to claim 1, characterized in that: The sampling tube comprises: Sampling tube body; An upper gland is sleeved on the sampling tube body, and an air outlet is formed on the upper gland; The lower pressure cover is sleeved on a side of the sampling tube body away from the upper pressure cover, and an air inlet is formed on the lower pressure cover.

9. The hazardous gas detection device according to claim 8, characterized in that: An explosion-proof net is arranged between the sampling tube body and the upper pressure cover, and an explosion-proof net is arranged between the sampling tube body and the lower pressure cover.

10. The hazardous gas detection device according to claim 3, characterized in that: Also includes: A transition section, through which the sampling tube is connected to the gas device, and the transition section is configured in a funnel shape.

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