Protection factor test chamber for gas protective clothing

Abstract

The utility model discloses a gas protective clothing protection factor test chamber, and relates to the field of gas protective clothing testing. Comprising an outer cabin, an inner cabin and a control system, the control system comprises a control monitoring screen and an experiment table, the inner cabin is a test cabin main body, and the front side wall of the test cabin main body is provided with a closed cabin door and a plurality of sampling ports; a control monitoring screen is arranged in the middle of the right edge of the outer side of the front side wall and connected with the testing devices and the action devices through corresponding lines. A test chamber air inlet, two glove operation ports and a voice system are arranged on the right side wall, a purification system air outlet is formed in the left side wall of the test chamber main body, and a purification system air inlet and a plurality of sample injection ports are formed in the rear side wall of the test chamber main body; a test chamber air outlet is formed in the top; a purifying device, a circulating fan, a stirring fan, a movable sliding rail device, a running machine, a temperature and humidity sensor and a pressure difference sensor are arranged in the test cabin main body. According to the utility model, liquid chemical substances are uniformly distributed in the test cabin; the purpose of accurately adjusting temperature and humidity is achieved.

Description

Technical Field

[0001] The utility model relates to the field of gas defense clothing testing, in particular to a test chamber for the protection factor of gas defense clothing. Background Art

[0002] A gas defense suit is a skin protection device for military and civilian use. It is used in combination with gas masks, gas gloves, gas boots, etc., and can effectively defend against the harm of toxic gases and droplet-like chemical agents to the human body. Gas defense suits can be divided into breathable gas defense suits and isolated gas defense suits. Gas defense suits mainly protect against blister agents such as mustard gas. Due to the high toxicity of mustard gas, when measuring the protection factor of gas defense suits in the laboratory, low-toxic dipropyl sulfide with a chemical structure and properties similar to those of mustard gas (dichlorodiethyl sulfide) is used instead. During the test, the spraying personnel wear protective equipment and hold an electric sprayer, enter the gas fumigation chamber with a temperature of 15 - 30 °C, and spray dipropyl sulfide at a gas concentration of 1.3 mg / L. After spraying, the spraying personnel leave the gas fumigation chamber. The test personnel wear a chloramine-ester-Congo red indicating suit inside and the specified protective equipment (including a carbon-containing breathable gas defense suit, a gas mask, gas gloves, gas boot covers, etc.) outside, and perform specified actions in the closed gas fumigation chamber sprayed with dipropyl sulfide for 15 minutes. The actions include shaking the head, swinging the arms, squatting, running, and marching. After the test, the test personnel leave the gas fumigation chamber, take off their clothing in the upwind direction, and check the indicating suit to observe whether there are blue spots on the indicating suit. If there are blue spots on the indicating suit of the test personnel, it is evaluated that the protection factor of this set of carbon-containing breathable gas defense suit is not greater than 90 or 33. If there are no blue spots on the indicating suit, it is evaluated that the protection factor of this set of carbon-containing breathable gas defense suit is greater than 90 or 33.

[0003] However, the main technical disadvantages of the above scheme are as follows: ① The temperature and humidity in the closed gas fumigation chamber cannot be adjusted; ② The spraying personnel carry an electric sprayer in and out of the closed chamber gas fumigation chamber, which will affect the internal temperature and humidity; ③ The closed gas fumigation chamber has no circulating purification device, and it is not easy to timely remove harmful substances after the test, and the interaction between the inside and outside of the chamber is not smooth. Based on the above disadvantages, it is necessary to improve the existing closed test chamber. Summary of the Invention

[0004] The utility model provides a test chamber for the protection factor of gas defense clothing to solve the above problems existing in the existing test device.

[0005] The present utility model is realized through the following technical solutions: A test chamber for the protection factor of a gas protection suit, comprising an outer chamber, an inner chamber, and a control system. The control system includes a control and monitoring screen and an experimental bench. The experimental bench is located outside the outer chamber. The inner chamber is the main body of the test chamber, and various test devices are provided inside the main body of the test chamber. The main body of the test chamber is in the shape of a cuboid, and the bottom of the main body of the test chamber is a base. A sealed hatch and a plurality of sampling ports are provided on the front side wall of the main body of the test chamber. A manual tightening handwheel is configured on the outer frame of the sealed hatch, and a sealing gasket is provided at the joint between the sealed hatch and the cabin wall surface. The sealed hatch is used for staff to enter and exit for maintenance and replacement of working components, and the sampling ports are used to collect the air inside the chamber to detect the concentration of pollutants. A control and monitoring screen is provided in the middle of the right edge outside the front side wall of the main body of the test chamber, which is used to control all controllable components inside the test chamber, including various fans and purification and exhaust systems. Therefore, the control and monitoring screen is connected to each test device and action device through corresponding circuits. A test chamber air inlet, two glove operation ports, and a voice system are provided on the right side wall of the main body of the test chamber. Gloves that can extend into the chamber are connected to the glove operation ports, which are used to operate the purifier button inside the main body of the test chamber or to center the device to be tested. The gloves themselves are inert and do not react with chemical pollutants, and the connection with the test chamber wall surface has good sealing performance. The test chamber air inlet is linked with the exhaust machine to ensure the smooth discharge of the polluted gas inside the test chamber and maintain the balance of the pressure inside the chamber. A purification system air outlet is provided on the left side wall of the main body of the test chamber, and a purification system air inlet and a plurality of sample injection ports are provided on the rear side wall of the main body of the test chamber. The sample injection ports are mainly used to connect the gaseous pollutant generating device and the particulate matter generating device to realize the injection of pollutants into the chamber and achieve the background environment required for the test. A test chamber exhaust port is provided on the top of the main body of the test chamber, and the test chamber exhaust port is also linked with the exhaust fan. An exhaust fan is also installed inside the main body of the test chamber, and the position of the exhaust fan can be set arbitrarily inside the test chamber to meet the requirement of exhausting the gas inside the chamber after the test is completed.

[0006] Inside the main body of the test chamber, there are a purification device, a circulation fan, a stirring fan, a moving slide rail device, a treadmill, a temperature and humidity sensor, and a differential pressure sensor. The moving slide rail device is perpendicular to the right side wall and is close to the glove operation port on the right side wall. The prototype to be tested can be set on the moving slide rail device to realize the movement of the prototype to be tested inside the chamber, facilitating the movement of different purifier prototypes. The treadmill is located on the base at the intersection of the left side wall and the rear side wall. The temperature and humidity sensor and the differential pressure sensor are both located at the top of the main body of the test chamber, used to detect temperature, humidity, and differential pressure. The stirring fan is located at the center position at the top. When conducting general air purifier tests, just turn on or off the stirring fan. In some special test cases where the surface wind speed needs to be strictly controlled, it can be achieved by adjusting the frequency conversion device. After the pollutants to be injected are evenly mixed, turn off the stirring fan at the top of the chamber. The circulation fan is placed at any position inside the main body of the test chamber; the air inlet of the purification system is connected to the purification device through a purification air duct, and the purification device is then connected to the air outlet of the purification system through a purification air duct. The purification device is equipped with a filter module for thoroughly filtering the polluted gas in the environmental chamber. It is recommended that after the test is completed, turn on the purification system for 20 minutes before opening the chamber door to take out the test piece to ensure the safety of the test personnel.

[0007] Preferably, the main body of the test chamber is built with ultra-clear tempered glass, stainless steel square tubes, and stainless steel plates.

[0008] Preferably, there are 4 sampling ports. The sampling ports are led to the outer chamber through polytetrafluoroethylene hoses and are equipped with ball valves, and are connected to the gaseous pollutant generation device or the particulate matter generation device through Φ6 mm stainless steel ferrule joints. Further, the gaseous pollutant generation device and the particulate matter generation device are an atomizer and an atomizing cup. The atomizer is connected to the atomizing cup, and the atomizing cup is connected to the stainless steel ferrule joint.

[0009] Preferably, there are 4 sampling ports. The sampling ports are led to the outer chamber through polytetrafluoroethylene hoses and are equipped with ball valves, and are connected to the sampling equipment through Φ6 mm stainless steel ferrule joints.

[0010] Preferably, the purification device includes a purification fan. The purification fan is equipped with a filter module, and the filter module includes a primary and a high-efficiency two-stage particulate filter and two layers of activated carbon chemical filters.

[0011] Preferably, the air inlet of the test chamber is connected to a Φ150 mm round pipe, and there is an openable sealed door on the wall of the chamber body.

[0012] Preferably, high-vacuum butterfly valves are provided at the air inlet of the purification system, the air outlet of the purification system, and the exhaust outlet of the test chamber. The high-vacuum butterfly valves are equipped with proximity switches for judging their open or closed states. The proximity switches feed back information to the PLC control system, and the PLC control system is connected to the control and monitoring screen.

[0013] Preferably, the movable slide rail device includes a movable floor, slide rails, and an operating rod. There are two slide rails arranged in parallel. The movable floor is clamped on the slide rails and can move back and forth along the slide rails. The operating rod is connected to the movable floor to control the movement of the movable floor. The height of the operating rod matches the height of the glove operation port.

[0014] Preferably, the sealed hatch door is 1900 mm high and 1000 mm wide. The outer frame is made of stainless steel. The outer frame of the sealed hatch door is equipped with a manual tightening handwheel, and a sealing gasket is provided at the joint between the hatch door and the cabin wall surface.

[0015] Compared with the prior art, the present utility model has the following beneficial effects: The gas mask protection factor test chamber provided by the present utility model uses an atomizer to add a liquid substance into an atomization cup. The liquid substance is atomized into a gas by an internal atomization component and evenly released from the outlet, realizing the uniform spraying of the liquid chemical substance in the test chamber; through the design of the inner chamber and the outer chamber, the purpose of accurately adjusting the temperature and humidity is achieved; the voice system can realize real-time dialogue and communication inside and outside the chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the present utility model.

[0017] The marks in the figure are as follows: 1 - test chamber main body, 2 - control and monitoring screen, 301 - sampling port, 302 - sample injection port, 4 - sealed hatch door, 5 - purification system air outlet, 6 - purification device, 7 - purification system air inlet, 8 - circulation fan, 9 - stirring fan, 10 - test chamber exhaust outlet, 11 - test chamber air inlet, 12 - glove operation port, 13 - voice system, 14 - movable slide rail device, 15 - treadmill, 16 - temperature and humidity sensor, 17 - differential pressure sensor, 18 - base. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The specific embodiments of the present utility model will be described below with reference to the accompanying drawings.

[0019] A gas mask protection factor test chamber, as Figure 1As shown in the figure, it includes an outer cabin, an inner cabin and a control system. The control system includes a control and monitoring screen 2 and an experimental bench, and the experimental bench is located outside the outer cabin; the inner cabin is the main body 1 of the test cabin. The main body 1 of the test cabin is in the shape of a cuboid, and the bottom of the main body 1 of the test cabin is a base 18; on the front side wall of the main body 1 of the test cabin, there are a sealed cabin door 4 and a plurality of sampling ports 301. The outer frame of the sealed cabin door is equipped with a manual tightening handwheel, and a sealing gasket is provided at the joint of the sealed cabin door and the cabin wall surface; in the middle of the right edge of the outer side of the front side wall of the main body 1 of the test cabin, there is a control and monitoring screen 2, and the control and monitoring screen 2 is connected to each test device and action device through corresponding lines; on the right side wall of the main body 1 of the test cabin, there are an air inlet 11 for the test cabin, two glove operation ports 12 and a voice system 13, and gloves that can extend into the cabin are connected to the glove operation ports 12; on the left side wall of the main body 1 of the test cabin, there is an air outlet 5 for the purification system, and on the rear side wall of the main body 1 of the test cabin, there are an air inlet 7 for the purification system and a plurality of sample injection ports 302; on the top of the main body 1 of the test cabin, there is an air outlet 10 for the test cabin. Inside the main body 1 of the test cabin, there are a purification device 6, a circulation fan 8, a stirring fan 9, a moving slide rail device 14, a treadmill 15, a temperature and humidity sensor 16 and a differential pressure sensor 17. The moving slide rail device 14 is perpendicular to the right side wall and is close to the glove operation port 12 on the right side wall; the treadmill 15 is located on the base 18 at the intersection of the left side wall and the rear side wall; both the temperature and humidity sensor 16 and the differential pressure sensor 17 are located at the top of the main body 1 of the test cabin; the stirring fan 9 is located at the central position of the top, and the circulation fan 8 is placed at any position inside the main body 1 of the test cabin; the air inlet 7 for the purification system is connected to the purification device 6 through a purification air duct, and the purification device 6 is then connected to the air outlet 5 for the purification system through a purification air duct; the exhaust fan is connected to the air inlet 11 for the test cabin and the air outlet 10 for the test cabin respectively through exhaust air ducts.

[0020] The following preferred solutions are adopted in this embodiment: the main body 1 of the test chamber is built by ultra-clear tempered glass, stainless steel square tubes and stainless steel plates; there are 4 sampling inlets 302, and the sampling inlets 302 are led to the outer chamber through PTFE hoses and ball valves are added, and are connected to the gaseous pollutant generation device or particulate matter generation device through Φ6 mm stainless steel ferrule fittings; in this embodiment, the gaseous pollutant generation device and particulate matter generation device are an atomizer and an atomizing cup, the atomizer is connected to the atomizing cup, and the atomizing cup is connected to the stainless steel ferrule fitting; there are 4 sampling ports 301, and the sampling ports 301 are led to the outer chamber through PTFE hoses and ball valves are added, and are connected to the sampling equipment through Φ6 mm stainless steel ferrule fittings; the purification device 6 includes a purification fan, and a filtering module is arranged in the purification fan, and the filtering module includes a primary and a high-efficiency particulate filter and two layers of activated carbon chemical filters; the air inlet 11 of the test chamber is connected to a Φ150 mm round pipe, and an openable sealed door is arranged on the wall surface of the chamber body; high-vacuum butterfly valves are arranged at the air inlet 7 of the purification system, the air outlet 5 of the purification system and the exhaust port 10 of the test chamber, the high-vacuum butterfly valves are equipped with proximity switches for judging their opening or closing states, the proximity switches feed back information to the PLC control system, and the PLC control system is connected to the control and monitoring screen; the movable slide rail device 14 includes a movable floor, slide rails and an operating rod, there are two parallel slide rails, the movable floor is clamped on the slide rails and can move back and forth along the slide rails, the operating rod is connected to the movable floor to control the movement of the movable floor, and the height of the operating rod matches the height of the glove operation port 12; the sealed cabin door 4 is 1900 mm high and 1000 mm wide, the outer frame is made of stainless steel, a manual tightening handwheel is configured on the outer frame of the sealed cabin door 4, and a sealing gasket is arranged at the joint of the cabin door and the cabin wall surface.

[0021] In this embodiment, the control system is the control and monitoring screen 2 and the experimental table, which are respectively used to control the stirring fan, the purification system, the exhaust system and the PLC monitoring system. At the beginning of the test, the handwheel and the sealing gasket are tightened together to ensure the sealing performance at the joint of the cabin door and the cabin body. The specific test process steps are as follows:

[0022] (1) Before the test in the test chamber, first clean the inner wall of the test chamber;

[0023] (2) Before the test, start the purification fan for circulation, open the high-vacuum butterfly valve of the purification air duct, confirm that the valve is in the open state, start the purification fan, and then conduct the test after running for 10 minutes to ensure that the background concentration of the test meets the requirements;

[0024] (3) Before the test starts, close the high-vacuum butterfly valve of the purification air duct to isolate the purification system and the inner chamber;

[0025] (4)Conduct test preparation work in the test chamber according to the test requirements. After all preparations are completed, close the test chamber door tightly to ensure the airtightness of the chamber body;

[0026] (5)Collect temperature and humidity information through the temperature and humidity sensor 16, and adjust the temperature and humidity environment in the test chamber through the control system to reach the set value and be in a stable state;

[0027] (6)Use an atomizer to add liquid substances into the atomization cup. After atomizing the liquid substances into gas by the internal atomization component, they are evenly released from the sample inlet 302, realizing the uniform spraying of liquid chemical substances in the test chamber;

[0028] (7)After the pollutant concentration reaches the test requirements, the test personnel enter the test chamber. The operators outside the test chamber issue instructions through the voice system, and the test personnel inside the test chamber perform the specified test actions to start the test;

[0029] (8)After the test is completed, the test personnel record the test results;

[0030] (9)After the test is completed, conduct purification treatment on the test chamber again. First, open the high-vacuum butterfly valve of the purification air duct to make it in the open state, turn on the purification fan, run for 20 minutes (it can be appropriately extended or shortened according to the pollutant concentration), then turn off the fan, and then close the high-vacuum butterfly valve on the purification air duct to end the purification operation. After the purification fan stops running, use a concentration detection instrument to detect the concentration in the chamber. The exhaust system can be turned on only after the concentration drops to the permitted emission standard.

[0031] The scope of protection claimed by the present utility model is not limited to the above specific embodiments. Moreover, for those skilled in the art, the present utility model can have various deformations and modifications. Any modification, improvement, and equivalent replacement made within the concept and principle of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A test chamber for the protection factor of a gas-proof suit, characterized in that: It includes an outer cabin, an inner cabin and a control system. The control system includes a control and monitoring screen (2) and a test bench table, and the test bench table is located outside the outer cabin; the inner cabin is the main body of the test cabin (1), the main body of the test cabin (1) is in a cuboid shape, and the bottom of the main body of the test cabin (1) is a base (18); on the front side wall of the main body of the test cabin (1), there are a sealed cabin door (4) and a plurality of sampling ports (301). The outer frame of the sealed cabin door is equipped with a manual tightening handwheel, and a sealing gasket is arranged at the joint between the sealed cabin door and the cabin wall surface; in the middle of the right edge of the outer side of the front side wall of the main body of the test cabin (1), there is a control and monitoring screen (2), and the control and monitoring screen (2) is connected to each test device and action device through corresponding circuits; on the right side wall of the main body of the test cabin (1), there are a test cabin air inlet (11), two glove operation ports (12) and a voice system (13), and gloves that can extend into the cabin are connected to the glove operation ports (12); on the left side wall of the main body of the test cabin (1), there is a purification system air outlet (5), and on the rear side wall of the main body of the test cabin (1), there are a purification system air inlet (7) and a plurality of sample injection ports (302); on the top of the main body of the test cabin (1), there is a test cabin exhaust port (10). Inside the main body of the test cabin (1), there are a purification device (6), a circulation fan (8), a stirring fan (9), a moving slide rail device (14), a treadmill (15), a temperature and humidity sensor (16), a differential pressure sensor (17) and an exhaust fan. The moving slide rail device (14) is perpendicular to the right side wall and is close to the position of the glove operation port (12) on the right side wall; the treadmill (15) is located on the base (18) at the intersection of the left side wall and the rear side wall; both the temperature and humidity sensor (16) and the differential pressure sensor (17) are located at the top of the main body of the test cabin (1); the stirring fan (9) is located at the central position of the top, and the circulation fan (8) is placed at any position inside the main body of the test cabin (1); the purification system air inlet (7) is connected to the purification device (6) through a purification air duct, and the purification device (6) is then connected to the purification system air outlet (5) through a purification air duct. The exhaust fan is connected to the test cabin air inlet (11) and the test cabin exhaust port (10) respectively through exhaust air ducts.

2. The anti-gas suit protection factor test chamber according to claim 1, characterized in that: The main body of the test cabin (1) is built by ultra-clear tempered glass, stainless steel square tubes and stainless steel plates.

3. A gas-proof clothing protection factor test chamber according to claim 1, characterized in that: There are 4 sample injection ports (302). The sample injection ports (302) are led to the outer cabin through polytetrafluoroethylene hoses and ball valves are added, and are connected to a gaseous pollutant generating device or a particulate matter generating device through Φ6 mm stainless steel ferrule joints.

4. A gas-proof clothing protection factor test chamber according to claim 1, characterized in that: There are 4 sampling ports (301). The sampling ports (301) are led to the outer cabin through polytetrafluoroethylene hoses and ball valves are added, and are connected to sampling equipment through Φ6 mm stainless steel ferrule joints.

5. A gas-proof clothing protection factor test chamber according to claim 1, characterized in that: The purification device (6) includes a purification fan, and a filtration module is arranged inside the purification fan. The filtration module includes a primary and a high-efficiency two-stage particulate filter and two layers of activated carbon chemical filters.

6. The gas-proof clothing protection factor test chamber according to claim 1, characterized in that: The air inlet (11) of the test chamber is connected to a round pipe with a diameter of Φ150 mm, and an openable sealed door is provided on the wall of the chamber.

7. A gas-proof suit protection factor test chamber according to claim 1, characterized in that: High vacuum butterfly valves are provided at the air inlet (7) of the purification system, the air outlet (5) of the purification system, and the exhaust air outlet (10) of the test chamber. The high vacuum butterfly valve is equipped with a proximity switch for judging its open or closed state. The proximity switch feeds back information to the PLC control system, and the PLC control system is connected to the control and monitoring screen.

8. A gas-proof clothing protection factor test chamber according to claim 1, characterized in that: The movable slide rail device (14) includes a movable floor, slide rails, and an operating rod. There are two slide rails arranged in parallel. The movable floor is clamped on the slide rails and can move back and forth along the slide rails. The operating rod is connected to the movable floor to control the movement of the movable floor, and the height of the operating rod matches the height of the glove operation port (12).

9. A gas-proof clothing protection factor test chamber according to claim 1, characterized in that: The sealed hatch door (4) is 1900 mm high and 1000 mm wide. The outer frame is made of stainless steel. The outer frame of the sealed hatch door (4) is equipped with a manual tightening handwheel, and a sealing gasket is provided at the joint between the hatch door and the chamber wall.

10. A gas-proof clothing protection factor test chamber according to claim 3, characterized in that: The gaseous pollutant generating device and the particulate matter generating device are an atomizer and an atomizing cup. The atomizer is connected to the atomizing cup, and the atomizing cup is connected to a stainless steel ferrule joint.

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