Device for demonstrating sealing isolation performance of gas mask

Abstract

The utility model provides a gas mask sealing isolation performance demonstration device, which comprises an aerosol generation module, an airflow test module, a breathing machine module, an aerosol concentration detection module and a control system module, the airflow testing module is used for simulating the flowing process of aerosol inside and outside the gas mask, the breathing machine module is used for simulating the artificial respiration process and can adjust the ventilation capacity and the breathing frequency, and the aerosol concentration detection module is used for detecting the aerosol concentration inside and outside a mask of the gas mask. According to the utility model, the technical problem that the protection state of a person wearing the gas mask cannot be directly observed in the traditional teaching and actual operation can be solved, and the visual demonstration of the sealing isolation performance of the gas mask can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of protection against toxic and harmful gases, and in particular relates to a gas mask sealing and isolation performance demonstration device. Background Art

[0002] Filter-type gas masks are an important part of respiratory protection equipment. They filter out toxic and harmful gases or aerosols through gas canisters to purify the air inside the mask, thereby protecting the lives of workers. Therefore, the sealing and isolation performance of gas masks, i.e., airtightness, is an important factor in evaluating protective performance. In order to facilitate researchers to observe the leakage of gas masks in different airtight states when wearing them, a device is urgently needed to simulate the sealing and isolation performance of gas masks, solve the problem that cannot be directly observed in traditional teaching and actual operation, and thus clearly and intuitively demonstrate the protective status of personnel when wearing gas masks. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] The utility model provides a gas mask sealing isolation performance demonstration device to solve the technical problem that the protective state of personnel wearing gas masks cannot be directly observed in traditional teaching and actual operation, and realizes a visual demonstration of the sealing isolation performance of the gas mask.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the utility model proposes a gas mask sealing isolation performance demonstration device, which includes an aerosol generating module, an airflow testing module, a respirator module, an aerosol concentration detection module and a control system module; wherein,

[0007] The aerosol generating module is used to generate aerosol, and includes a compression pump, a liquid storage bottle, a turbine fan, a mixing chamber and a flow meter; wherein, the compression pump generates a high-speed airflow to impact the aerosol generating medium in the liquid storage bottle, generates aerosol particles and passes them into the mixing chamber through a transparent pipeline; the turbine fan sends air into the mixing chamber to mix with the aerosol particles; a flow meter is arranged between the turbine fan and the mixing chamber, and the concentration of the mixed aerosol is adjusted by the flow meter to ensure that the flow meets the test requirements; the mixed aerosol passes into the airflow test module through a transparent pipeline;

[0008] The airflow test module is used to simulate and evaluate the sealing and isolation performance of gas masks against toxic and harmful gases;

[0009] The ventilator module is used to simulate the artificial respiration process and can adjust the ventilation volume and respiratory frequency, including an artificial lung and a motion mechanism; the artificial lung is driven by the motion mechanism and is connected to the test head model through a pipeline; when the artificial lung inhales, negative pressure is generated inside the mask of the gas mask through the oral and nasal cavities of the test head model, so that the airflow enters from the air inlet of the gas filter canister of the gas mask; when exhaling, the airflow inside the gas mask can be discharged into the sealed cabin through the exhalation valve;

[0010] The aerosol concentration detection module includes a particle counter for detecting the aerosol concentration inside and outside the mask of the gas mask;

[0011] The control system module is connected to other modules and pipelines through the control circuit, and the demonstration process parameters are designed through the built-in control software, so that the entire process is automatically feedback controlled and the gas mask sealing and isolation performance demonstration test is completed according to the set parameters.

[0012] Furthermore, the airflow test module includes a gas mask, a test head mold and a transparent sealing cover; wherein the test head mold is used to simulate the head and facial structure of a person, the gas mask is put on the test head mold and placed inside the transparent sealing cover, and the transparent sealing cover is used to seal and isolate the gas mask and the test head mold from the external environment.

[0013] Further, the gas mask has a large eye window lens.

[0014] Furthermore, the lenses of the gas mask are made of transparent polymer material.

[0015] Furthermore, a controllable fault point is provided on the gas mask.

[0016] Furthermore, the controllable fault points include air leaks and sealing gaskets.

[0017] (III) Beneficial effects

[0018] The utility model proposes a gas mask sealing isolation performance demonstration device, including an aerosol generation module, an airflow test module, a ventilator module, an aerosol concentration detection module and a control system module. The aerosol generation module is used to simulate the generation of aerosols, the airflow test module is used to simulate the flow process of aerosols inside and outside the gas mask, the ventilator module is used to simulate the artificial respiration process and can adjust the ventilation volume and breathing frequency, and the aerosol concentration detection module is used to detect the aerosol concentration inside and outside the mask of the gas mask. The utility model can solve the technical problem that it is impossible to directly observe the protective state of personnel when wearing a gas mask in traditional teaching and actual operation, and realize the visual demonstration of the sealing isolation performance of the gas mask. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a schematic diagram of the overall structure of a gas mask sealing and isolation performance demonstration device. DETAILED DESCRIPTION

[0020] In order to make the purpose, content and advantages of the utility model clearer, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments.

[0021] This embodiment provides a gas mask sealing isolation performance demonstration device, the overall structure of which is as follows: Figure 1 As shown, the device consists of an aerosol generating module, an airflow testing module, a ventilator module 10, an aerosol concentration detecting module and a control system module 11.

[0022] The aerosol generating module is used to generate aerosol, and includes a compression pump 3, a liquid storage bottle 2, a turbine fan 1, a mixing chamber 5 and a flow meter 4. The compression pump 3 generates a high-speed airflow to impact the aerosol generating medium in the liquid storage bottle 2, generating aerosol particles, which are passed into the mixing chamber 5 through a transparent pipeline. The turbine fan 3 sends air into the mixing chamber 5 at a certain wind speed to mix with the aerosol particles. A flow meter 4 is set between the turbine fan 3 and the mixing chamber 5, and the concentration of the mixed aerosol is adjusted by the flow meter 4 to ensure that the flow rate meets the test requirements. The mixed aerosol is passed into the airflow test module through a transparent pipeline.

[0023] The airflow test module is used to simulate and evaluate the sealing and isolation performance of the gas mask against toxic and harmful gases, and includes a gas mask 8, a test head mold 9 and a transparent sealing cover 6. The test head mold 9 is used to simulate the head and facial structure of a person, and the gas mask 8 is put on the test head mold 9 and placed inside the transparent sealing cover 6. The transparent sealing cover 6 is used to seal and isolate the gas mask 8 and the test head mold 9 from the external environment. The gas mask 8 has a large eye window lens, which is made of transparent polymer material, and the mask is provided with controllable fault points such as leak holes and sealing pads.

[0024] The ventilator module 10 is used to simulate the artificial respiration process and can adjust the ventilation volume and respiratory frequency. It includes an artificial lung and a motion mechanism. The artificial lung is driven by the motion mechanism and is connected to the test head model 9 through a pipeline. When the artificial lung inhales, a negative pressure is generated inside the mask of the gas mask 8 through the oral and nasal cavities of the test head model 9, so that the airflow enters from the air inlet of the gas filter canister of the gas mask 8; when exhaling, the airflow inside the gas mask 8 can be discharged into the transparent sealing cover 6 through the exhalation valve.

[0025] The aerosol concentration detection module 7 includes a particle counter for detecting the aerosol concentration inside and outside the mask of the gas mask 8 .

[0026] The control system module 11 is connected to other modules and pipelines through the control circuit, and the demonstration process parameters are designed through the built-in control software, so that the entire process is automatically feedback controlled, and the gas mask sealing and isolation performance demonstration test is completed according to the set parameters, realizing the automation and intelligent operation of the demonstration work.

[0027] During the entire demonstration process, in order to facilitate teaching and guidance of the experimental process, photoelectric flow indicator lights are set on each module and test gas path of the demonstration device, which can indicate the working status of each module and the movement direction of the test gas.

[0028] The method for demonstrating the sealing isolation performance demonstration device of the gas mask of the utility model is as follows: the aerosol generating medium is loaded into the liquid storage bottle 2, and the oil storage bottle 2 is installed on the aerosol generating module; the electric control switch of the compression pump 3 and the turbine fan 1 is started, and the compression pump 3 generates a high-speed airflow to impact the medium in the oil storage bottle 2 to be aerosolized, and aerosol particles are generated and passed into the mixing chamber 5; at the same time, the turbine fan 1 is operated to pass air into the mixing chamber 5 at a certain wind speed and mix it with the aerosol, and the air flow is adjusted by the flow meter 4; the mixed aerosol passes through the transparent tube The air in the transparent sealed cover 6 is filled with the air inlet of the gas mask 8, and the breathing machine module 10 is working to simulate the artificial respiration state. When inhaling, the mixed gas in the transparent sealed cover 6 flows into the mask through the gas filter canister air inlet of the gas mask 8, and then enters the breathing line of the test head mold 9; when exhaling, the internal gas of the gas mask 8 is exhaled through the exhalation valve and enters the transparent sealed cover 6; during the breathing process, the aerosol concentration detection module 7 can sample the transparent sealed cover 6 and the gas mask 8 through the pipeline, measure the concentration of the internal aerosol and display it on the panel. After the control system module sets the parameters, it connects other modules through the control circuit, so that the whole process is automatically feedback controlled.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A gas mask sealing and isolation performance demonstration device, characterized in that: The gas mask sealing and isolation performance demonstration device comprises an aerosol generating module, an airflow testing module, a ventilator module, an aerosol concentration detecting module and a control system module; wherein, The aerosol generating module is used to generate aerosol, and includes a compression pump, a liquid storage bottle, a turbine fan, a mixing chamber and a flow meter; wherein the compression pump generates a high-speed airflow to impact the aerosol generating medium in the liquid storage bottle, generates aerosol particles and passes into the mixing chamber through a transparent pipeline; the turbine fan sends air into the mixing chamber to mix with the aerosol particles; a flow meter is arranged between the turbine fan and the mixing chamber, and the concentration of the mixed aerosol is adjusted by the flow meter to ensure that the flow rate meets the test requirements; the mixed aerosol passes into the airflow test module through a transparent pipeline; The airflow test module is used to simulate and evaluate the sealing and isolation performance of the gas mask against toxic and harmful gases; The ventilator module is used to simulate the artificial respiration process and can adjust the ventilation volume and respiratory frequency, including an artificial lung and a motion mechanism; wherein the artificial lung is driven by the motion mechanism and is connected to the test head model through a pipeline; when the artificial lung inhales, a negative pressure is generated inside the mask of the gas mask through the oral and nasal cavities of the test head model, so that the airflow enters from the air inlet of the gas filter canister of the gas mask; when exhaling, the airflow inside the gas mask can be discharged into the sealed cabin through the exhalation valve; The aerosol concentration detection module includes a particle counter for detecting the aerosol concentration inside and outside the mask of the gas mask; The control system module is connected to other modules and pipelines through a control circuit, and the demonstration process parameters are designed through built-in control software, so that the entire process is automatically feedback controlled and the gas mask sealing and isolation performance demonstration test is completed according to the set parameters.

2. The gas mask sealing and isolation performance demonstration device according to claim 1, characterized in that: The airflow test module includes a gas mask, a test head mold and a transparent sealing cover; wherein the test head mold is used to simulate the head and facial structure of a person, the gas mask is put on the test head mold and placed inside the transparent sealing cover, and the transparent sealing cover is used to seal and isolate the gas mask and the test head mold from the external environment.

3. The gas mask sealing and isolation performance demonstration device according to claim 2, characterized in that: The gas mask has large eye-window lenses.

4. The gas mask sealing and isolation performance demonstration device according to claim 2, characterized in that: The lenses of the gas mask are made of transparent polymer material.

5. The gas mask sealing and isolation performance demonstration device according to claim 2, characterized in that: The gas mask is provided with a controllable fault point.

6. The gas mask sealing and isolation performance demonstration device according to claim 5, characterized in that: The controllable fault points include air leakage holes and sealing pads.

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