Toxic and harmful gas online leakage alarm device

Abstract

The invention discloses a toxic and harmful gas online leakage alarm device, which relates to the field of gas alarms, and is characterized in that the toxic and harmful gas online leakage alarm device comprises a gas inlet acquisition module which comprises a daily gas outlet and an accurate gas outlet; the processing analysis module is provided with a daily air inlet and a precise air inlet which correspond to the daily air outlet and the precise air outlet respectively, the air inlet collection module comprises a daily collection mode and a precise collection mode, and the airflow direction in the daily collection mode is from the daily air outlet to the daily air inlet; in the accurate collection mode, the air flow direction is from the accurate air outlet to the accurate air inlet, under the initial condition, the air inlet collection module keeps a daily collection mode, and once the processing analysis module detects that the air contains a trace amount of toxic and harmful gas, the air inlet collection module is converted into the accurate collection mode. When a dangerous symptom exists, a sampling gas path can be automatically adjusted, and the flow of sampled air can be ensured, so that the detection precision is ensured.

Description

Technical Field

[0001] The invention relates to the field of gas alarms, and more particularly to an online leakage alarm device for toxic and harmful gases. Background Art

[0002] The online leakage alarm device for toxic and harmful gases is a safety device specially used for real-time monitoring of toxic and harmful gas leakage in the environment. It continuously collects gas samples in the air and analyzes their composition and concentration to promptly detect potential harmful gas leakage problems, thereby triggering an alarm mechanism to ensure the safety of personnel and the environment.

[0003] However, the detection device often uses an air pump to pump gas into the device to provide samples. The pipeline for collecting the gas to be tested is easily blocked by dust and debris in the air. The dust and debris accumulated in the detection device will also affect the accuracy of the detection, which may easily lead to the problem of delayed alarm when a danger occurs.

[0004] Therefore, new solutions need to be proposed to solve this problem. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention aims to provide an online leakage alarm device for toxic and harmful gases.

[0006] The above technical purpose of the present invention is achieved through the following technical solutions: an online leakage alarm device for toxic and harmful gases comprises an air intake collection module, a processing and analysis module and an early warning prompt module, the air intake collection module can transmit air in the environment to the processing and analysis module, the air intake collection module comprises a daily air outlet and a precise air outlet, the processing and analysis module is provided with a daily air inlet and a precise air inlet corresponding to the daily air outlet and the precise air outlet respectively, the air intake collection module comprises a daily collection mode and a precise collection mode, in the daily collection mode the air flow direction is daily air outlet-daily air inlet; in the precise collection mode the air flow direction is precise air outlet-precise air inlet, the air intake collection module switches between the daily collection mode and the precise collection mode, under initial conditions, the air intake collection module maintains the daily collection mode, and once the processing and analysis module detects that the air contains a trace amount of toxic and harmful gases, the air intake collection module switches to the precise collection mode.

[0007] The present invention is further configured as follows: the air intake collection module includes a micro fan and a three-way solenoid valve, the three-way solenoid valve includes a solenoid valve air inlet, a normally closed air outlet, and a normally open air outlet, the solenoid valve air inlet is connected to the air outlet of the micro fan, the normally open air outlet is connected to the daily air outlet through a dust-proof air path, and the normally closed air outlet is connected to the precise air outlet through a pipe.

[0008] The present invention is further configured as follows: the micro fan is a centrifugal fan, and the air inlet of the micro fan is vertically downward.

[0009] The present invention is further configured as follows: the dust-proof air circuit includes an air splitter, which is used to divide the air flow of the normally open air outlet into two paths, namely a cooling air path and a monitoring air path, the cooling air path flows to the top of the micro fan and blows toward the motor part of the micro fan, and the monitoring air path flows to the daily air outlet.

[0010] The present invention is further configured such that: the processing and analysis module is electrically connected to a three-way solenoid valve, and when the processing and analysis module detects toxic and harmful gases, the three-way solenoid valve is energized.

[0011] The present invention is further configured such that: the threshold value for the processing and analysis module to control the three-way solenoid valve to be energized is 40%-70% of the upper limit of the safe concentration of toxic and harmful gases.

[0012] In summary, the present invention has the following beneficial effects: The present invention is divided into a daily collection mode and a precise collection mode. The device can automatically adjust the sampling gas path under different gas concentration levels. In daily detection, dust will only accumulate in the daily sampling gas path. When there are dangerous signs, the sampling gas path can be automatically adjusted to ensure the flow rate of the sampling air and thus ensure the accuracy of the detection.

[0013] The cooling air path of the device can blow to the micro fan to prevent the fan from overheating and ensure long-term stable operation.

[0014] In the daily collection mode, less gas is sampled, so that the sensor can only be exposed to a lower amount of the gas to be tested, reducing the occurrence of sensor poisoning and increasing the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention.

[0016] In the figure: 1. Daily air outlet; 2. Precision air outlet; 3. Micro fan; 4. Three-way solenoid valve; 5. Solenoid valve air inlet; 6. Normally closed air outlet; 7. Normally open air outlet; 8. Air distributor; 9. Cooling air circuit; 10. Monitoring air circuit. DETAILED DESCRIPTION

[0017] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0018] Embodiment: A poisonous and harmful gas online leakage alarm device, such as Figure 1As shown, in the initial state, the air intake collection module operates in the daily collection mode. In this mode, the airflow flows in from the daily air outlet and is sent to the processing and analysis module through the daily air inlet. In this mode, the concentration of toxic and harmful gases in the air is continuously monitored, and the system will perform routine air tests to ensure environmental safety. The micro fan provides airflow for the air intake collection module, and at the same time ensures the normal operation of the micro fan through the dust-proof air path and the cooling air path to prevent dust accumulation from causing the fan to overheat or performance degradation.

[0019] When the processing and analysis module detects that the concentration of toxic and harmful gases in the air exceeds the preset threshold (70% of the upper limit of the safe concentration), the three-way solenoid valve will receive a control command through an electrical signal and switch to the precise collection mode. During this process, the air intake collection module will adjust the airflow direction from the precise outlet to the precise inlet, thereby improving the accuracy and sensitivity of gas sampling and accurately monitoring the concentration of toxic and harmful gases.

[0020] In the precise collection mode, the air samples to be tested flow into the processing and analysis module efficiently, which is suitable for more accurate detection of harmful gases.

[0021] Once it is detected that the concentration of toxic and harmful gases reaches a dangerous level (exceeding the upper limit of safe concentration), the processing and analysis module will trigger the early warning prompt module.

[0022] The early warning module will notify relevant personnel through sound, light signals and remote alarms. The early warning module includes a wireless communication module that can access the industrial Internet and monitor air data in real time.

[0023] By dividing the collection mode into daily collection mode and precise collection mode, the device can automatically adjust the sampling gas path under different gas concentration levels. In daily detection, dust will only accumulate in the daily sampling gas path. When there are dangerous signs, the sampling gas path can be automatically adjusted to ensure the flow rate of the sampling air and thus ensure the accuracy of the detection.

[0024] It ensures energy saving and basic monitoring at low concentrations, while switching to precise mode at high concentrations, providing higher sensitivity and accuracy to ensure timely detection of potential dangers.

[0025] In the daily collection mode, the air flow and fan power are low, which effectively reduces the energy consumption of the device and prolongs the service life of the device. The precision mode is only enabled when dangerous gases are detected, which reduces the burden on the device, increases stability and service life. The cooling air path of the device can blow to the micro fan to avoid overheating of the fan and ensure long-term stable operation.

[0026] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An online toxic and harmful gas leakage alarm device, comprising an intake air collection module, a processing and analysis module and an early warning prompt module, characterized in that: The air intake collection module can transmit air in the environment to the processing and analysis module, the air intake collection module includes a daily air outlet and a precise air outlet, the processing and analysis module is provided with a daily air inlet and a precise air inlet corresponding to the daily air outlet and the precise air outlet respectively, the air intake collection module includes a daily collection mode and a precise collection mode, in the daily collection mode the air flow direction is daily air outlet-daily air inlet; in the precise collection mode the air flow direction is precise air outlet-precise air inlet, the air intake collection module switches between the daily collection mode and the precise collection mode, under initial conditions, the air intake collection module maintains the daily collection mode, and once the processing and analysis module detects that there are trace amounts of toxic and harmful gases in the air, the air intake collection module switches to the precise collection mode.

2. The toxic and harmful gas online leakage alarm device according to claim 1 is characterized in that: The air intake collection module includes a micro fan and a three-way solenoid valve. The three-way solenoid valve includes a solenoid valve air inlet, a normally closed air outlet, and a normally open air outlet. The solenoid valve air inlet is connected to the air outlet of the micro fan, the normally open air outlet is connected to the daily air outlet through a dust-proof air path, and the normally closed air outlet is connected to the precise air outlet through a pipeline.

3. The toxic and harmful gas online leakage alarm device according to claim 2 is characterized in that: The micro fan is a centrifugal fan, and the air inlet of the micro fan is vertically downward.

4. The toxic and harmful gas online leakage alarm device according to claim 3 is characterized in that: The dust-proof air path includes an air splitter, which is used to divide the air flow of the normally open air outlet into two paths, namely a cooling air path and a monitoring air path. The cooling air path flows to the top of the micro fan and blows toward the motor part of the micro fan, and the monitoring air path flows to the daily air outlet.

5. The online toxic and harmful gas leakage alarm device according to claim 2 is characterized in that: The processing and analysis module is electrically connected to the three-way solenoid valve, and the three-way solenoid valve is energized when the processing and analysis module detects toxic and harmful gases.

6. The online toxic and harmful gas leakage alarm device according to claim 5 is characterized in that: The processing and analysis module controls the three-way solenoid valve to be energized at a threshold value of 40%-70% of the upper limit of the safe concentration of toxic and harmful gases.

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