CN101526450A - Fumigation simulation device for fumigation gas - Google Patents

Abstract

The invention relates to a fumigation gas simulation fumigation device, which includes a closed box with a sandwich structure with a sealed door, and a functional control box for controlling and operating system on the outside of the closed box, between the inner tank and the outer shell of the closed box The interlayer is filled with insulation materials, and the upper and lower walls and side walls of the inner tank are respectively opened with a sampler port that penetrates the insulation material and the outer shell, and there are sampling gas ports, sample return ports, and valves with sealing valves. Air inlet and exhaust air outlet, etc.; the front panel of the functional control box for accommodating control and operating system includes a color touch screen connected to the microcomputer control system, data interface and power switch, and all have pneumatic quick connectors The sampling gas port, sample return port and 3 sampler ports; the fumigant gas is injected into the closed box through the sample gas port, the fumigant gas is exported out of the closed box through the sampler port, and can be exported out of the closed box through the sample return port. The fumigant gas outside the body is reinjected into the airtight box for circulation.

Description

Fumigation gas simulation fumigation device

technical field

The invention belongs to the technical field of fumigation, in particular to a fumigation gas simulation fumigation device used for detecting and analyzing fumigation gas during experiments.

Background technique

Currently used fumigants mainly include methyl bromide, ethylene oxide, sulfuryl fluoride, and phosphine, which are used for insecticide, rodent control, and disinfection of grain, plants, containers, and vehicles. Fumigant dosage, concentration, action time, safe air release time after fumigation, etc. are the main factors that determine the fumigation effect and ensure the safety of workers. A large number of studies, simulated fumigation experiment is the most commonly used experimental method.

At present, there are two types of devices commonly used in simulated fumigation experiments: the one is a simple airtight box, such as the sulfuryl fluoride fumigation experimental research carried out by Xie Jianbo (China Frontier Health and Quarantine Journal, 1999, 22 (6): 337-340); It is a container, such as the fumigation research of wood packaging materials carried out by Wang Yuejin (Plant Quarantine, 2004, 18 (1): 1-4). Since the fumigants are all gases, they are poisonous to the human body, and their effects are greatly affected by the ambient temperature and humidity. Therefore, the above two methods have insurmountable defects, that is, they cannot control the influence of the external environment, and cannot guarantee the uniform distribution of the fumigant gas in the experimental space. , can not detect changes in fumigant gas concentration in real time, etc., so the reliability and repeatability of experimental data cannot be guaranteed, resulting in the lack of basic research data on existing fumigants, while the data obtained in previous experiments are reliable and practical. Sex is also greatly discounted.

Contents of the invention

The purpose of the present invention is to solve the problem of lack of experimental devices in the experimental research of fumigants, to provide a scientific and practical fumigation gas simulation fumigation device, which can automatically control temperature and humidity, and can be sampled at any time to detect fumigant gas simulation fumigation device Real-time concentration of fumigant gas.

The fumigation gas simulation fumigation device of the present invention comprises a closed box with a sandwich structure with a sealed door (the inner tank and the outer shell of the box can be made of stainless steel), and the control and operating system are accommodated on the outside of the closed box. Function control box;

A heat exchange component is arranged in the airtight box, and the interlayer between the inner tank and the outer shell of the airtight box is filled with thermal insulation materials; there are one penetrating heat insulation on the upper and lower walls and one side wall of the inner tank of the airtight box. The sampler port of the material and the shell; on the wall of the inner tank of the airtight box, there are respectively opened a sample gas port, a sample return port, an air inlet, an exhaust air outlet and a steam inlet that penetrate the insulation material and the outer shell;

The front panel of the functional control box for the containment control and operating system includes a color touch screen connected to the microcomputer control system, a data interface and a power switch; The sample return port of the pneumatic quick connector and the 3 sampler ports with the pneumatic quick connector; among them: the 3 sampler ports are independently connected to the upper and lower walls and side walls of the airtight box through their respective gas conduits. The device ports are connected one by one, the sample gas port is connected with the sample gas port on the inner wall of the closed box through the gas conduit, and the sample return port is connected with the sample return port on the inner wall of the airtight box through the gas conduit;

A water tank is arranged below the functional control box for accommodating control and an operating system, and a water tank outlet and a water inlet are opened on the wall of the water tank.

The sample inlet gas port and the sample return gas port opened on the wall of the inner tank of the airtight box are respectively opened on different walls of the inner tank of the airtight box.

The air inlet opened on the inner wall of the airtight box is opened on the upper wall of the inner liner of the airtight box, and communicates with the air inlet with a sealing valve located at the back of the airtight box through a pipeline.

The exhaust air outlet opened on the inner wall of the airtight box is opened in the middle of the side wall of the inner liner of the airtight box, and is connected with the exhaust air outlet with the sealing valve arranged at the back of the airtight box through the pipeline. The air outlets are connected.

The fumigation gas simulation fumigation device is further provided with a video line interface and a power line interface.

A camera is further installed in the airtight box, and the signal output data line of the camera can be connected with a computer monitor through a video cable interface, and the computer monitor can be used to monitor the running state of the fumigation object, operate and check the temperature and humidity running curve, real-time monitoring and storage Dynamic images of the experimental process, data transmission, data storage, data and curve printing, etc.

The sampling gas port with pneumatic quick connectors, the sample return gas port with pneumatic quick connectors, and the three sampler ports with pneumatic quick connectors can be connected to small gas circulation pumps respectively through their respective pneumatic quick connectors , to inject the fumigant gas into the airtight box or export the gas in the airtight box for sampling.

A circulating fan is further installed in the airtight stainless steel box.

The inner liner of the airtight box body is at a 90-degree right angle up and down, and the gas in the inner liner of the airtight box body can be mixed evenly within 10 minutes through the control of the circulating fan, and a non-reactive handle (cargo frame lock) is adopted , to ensure the airtightness of the airtight door. The gas in the inner tank of the airtight box polluted by fumigant gas will not leak out, but it can be taken away from the exhaust air outlet with a sealed valve; the air inlet with a sealed valve and the exhaust air outlet with a sealed valve are set Behind the airtight stainless steel box.

The connection between the inner liner and the outer shell of the airtight box is made of non-metallic high and low temperature resistant materials, which can effectively reduce temperature conduction; the sealing material of the airtight door is refined silicone rubber, which does not have aging and hardening under high and low temperature conditions Phenomenon, to ensure reliable sealing. The gas conduits inserted in the various openings on the airtight box body are in sealing connection with the airtight box body.

The microcomputer control system can automatically control the temperature change of the heat exchange components in the airtight box and the temperature of the heat exchange components entering the airtight box from the steam inlet according to the temperature and humidity parameters in the airtight box set by the color touch screen in advance, and according to the software program of the microcomputer. The steam volume is used to control the temperature and humidity in the airtight box, and the temperature and humidity data and the temperature and humidity operating curve in the airtight box are displayed in real time through the color touch screen.

In the fumigation gas simulation fumigation device, the temperature range in the airtight box controlled by the heat exchange component is: 5-55°C, and the control accuracy is: ±1°C; the amount of steam entering the airtight box from the steam inlet controls the relative temperature in the airtight box. Humidity range: 30% ~ 98%, control accuracy: ± 5%.

The heat exchange part in the airtight box is located on one side of the airtight box, and its surface is sealed and connected with the inner surface of the airtight box; the heat exchange part is composed of a heating pipe and a refrigeration evaporator, and the pipelines of the heating pipe and the refrigeration evaporator penetrate the insulation The material and shell are respectively connected with the heating and cooling control system outside the airtight box; among them, the heating tube is heated by a military-grade stainless steel finned heating tube, and the refrigeration evaporator is a compressor cooling method.

A steam pipe is installed at the steam inlet, and a valve is arranged on the steam pipe outside the airtight box, and the amount of steam entering the airtight box can be controlled through the switch of the valve; the relative humidity control adopts the steam humidification method from low to high .

The data interface is an RS-232 interface, which can be connected to a computer through a data cable to perform program setting and storage, view temperature and humidity operating curves, and print data and curves.

In the present invention, a small gas circulation pump is connected to the sampling gas port with a pneumatic quick connector, and the fumigant gas is injected into the airtight box, and the fumigant gas can be exported out of the airtight box by connecting three sampler ports with a pneumatic quick connector through a small gas circulation pump. Outside the body, the sample return port with a pneumatic quick connector can be connected through a small gas circulation pump, and the fumigant gas exported outside the closed box can be injected into the closed box for circulation, so as to sample and detect the fumigation in the closed box at any time The real-time concentration of the gas.

Description of drawings

Figure 1. Schematic diagram of the front structure of the fumigation gas simulation fumigation device of the present invention.

Fig. 2. Schematic diagram of the back structure of the fumigation gas simulation fumigation device of the present invention.

reference sign

1. Sealed door 2. Touch screen 3. Power switch 4. Data interface

5. Sampler port 6. Inlet gas port 7. Sample return port 8. Water tank

9. Air inlet 10. Exhaust air outlet 11. Water tank inlet 12. Water tank drain

Detailed ways

Please refer to Figure 1 and Figure 2. The fumigation gas simulation fumigation device consists of a closed stainless steel box with a sandwich structure made of stainless steel and a function control box for the control and operating system on the outside of the closed stainless steel box (the closed box and the function control The shell of the box can be an integral structure); wherein the inner tank of the airtight box is at a right angle of 90 degrees up and down, and a circulating fan is installed in the airtight stainless steel box.

The interlayer between the inner tank and the outer shell of the airtight stainless steel box is filled with thermal insulation materials; one sampler is respectively opened on the upper and lower walls of the inner tank of the airtight stainless steel box and the middle of one side wall to penetrate the thermal insulation material and the outer shell. Port 5; on the upper wall and the middle part of the side wall of the airtight stainless steel box inner tank, there are respectively opened a sample inlet port 6 and a sample return air port 7 that penetrate the insulation material and the outer shell; on the upper wall of the airtight stainless steel box inner tank There is an air inlet that penetrates the thermal insulation material and the outer casing, and an exhaust air outlet that penetrates the thermal insulation material and the outer casing is opened in the middle of the side wall of the inner tank of the airtight stainless steel box. The air inlet 9 with a sealing valve located at the back of the airtight stainless steel box communicates with the exhaust air outlet 10 with a sealing valve.

There is also a steam inlet penetrating through the insulation material and the shell on the wall of the inner tank of the airtight box, a steam pipe is installed at the steam inlet, and a valve is arranged on the steam pipe outside the airtight box.

A heat exchange component consisting of a heating tube and a refrigeration evaporator is arranged on one side of the closed box. The surface of the heat exchange component is sealed and connected with the inner surface of the closed box. The pipelines of the heating tube and the refrigeration evaporator penetrate the insulation material and the shell and The heating and cooling control systems outside the airtight box are connected separately; among them, the heating tube is heated by military-grade stainless steel finned heating tube, and the refrigeration evaporator is a compressor cooling method. The temperature range in the airtight box controlled by the heat exchange component is: 5-55°C, and the control accuracy is: ±1°C; the relative humidity in the airtight box is controlled by the amount of steam entering the airtight box from the steam inlet: 30%～ 98%, the control accuracy is: ±5%.

The front panel of the functional control box of the described accommodating control and operating system includes a color touch screen 2 connected to a microcomputer control system, an RS-232 data interface 4 and a power switch 3; Sampling gas port 6, sample return port 7 with pneumatic quick connector and 3 sampler ports 5 with pneumatic quick connector; among them: 3 sampler ports are independently connected to the inner tank of the airtight box through their respective gas conduits The sampler ports on the upper and lower walls and the side walls are connected one by one, the sample gas port is connected with the sample gas port on the inner wall of the airtight box through the gas conduit, and the sample return port is connected with the inner liner of the airtight box through the gas conduit. The sample return port on the wall is connected.

A water tank 8 (for humidity adjustment in the tank) is provided below the functional control box for accommodating control and the operating system, and a water tank outlet 12 and a water inlet are opened on the wall of the water tank, and the water supply switch 11 is used to control the water pump to supply water to the water tank .

A camera is also installed in the airtight stainless steel box, and the signal output data line of the camera is connected with the computer monitor through the video line interface set on the fumigation gas simulation device. Curve, real-time monitoring and storage of dynamic images of the experimental process, data transmission, data storage, data and curve printing, etc.

The sampling gas port with pneumatic quick connectors, the sample return gas port with pneumatic quick connectors, and the three sampler ports with pneumatic quick connectors can be connected to small gas circulation pumps respectively through their respective pneumatic quick connectors , to inject the fumigant gas into the airtight stainless steel box or export the gas in the airtight stainless steel box for sampling.

The microcomputer control system can automatically control the temperature change of the heat exchange components in the airtight box and the temperature of the heat exchange components entering the airtight box from the steam inlet according to the temperature and humidity parameters in the airtight box set by the color touch screen in advance, and according to the software program of the microcomputer. The steam volume is used to control the temperature and humidity in the airtight box, and the temperature and humidity data and the temperature and humidity operating curve in the airtight box are displayed in real time through the color touch screen.

The RS-232 data interface can be connected to a computer through a data cable to perform program setting and storage, view temperature and humidity operating curves, print data and curves, and the like.

Provide power to the fumigant gas simulation fumigation device through the power cord interface on the fumigant gas simulation fumigation device.

Utilize above-mentioned fumigation gas simulation fumigation device to carry out the process of fumigation experiment:

1. First close the air inlet 9 with a sealed valve and the exhaust air outlet 10 with a sealed valve, then turn on the water supply switch 11 and the power switch 3;

2. Open the airtight door 1, place the fumigation object in the airtight stainless steel box, and close the airtight door 1;

3. Set the fumigation conditions (temperature, humidity) through the color touch screen 2 and start the operation;

4. After the system is running stably, inject a certain amount of fumigant gas through the sampling gas port 6, and the circulation fan in the closed stainless steel box can automatically mix the gas in the closed stainless steel box evenly. During the experiment, the rubber tube and small gas circulation can be used at any time. The three sampler ports with pneumatic quick connectors connected to the pump lead the fumigant gas out of the airtight box, and can export the fumigant gas out of the airtight box through the sample return port with pneumatic quick connectors connected with rubber tubes and small gas circulation pumps. The fumigant gas outside the body is reinjected into the airtight box to form an internal gas circulation path to collect gas samples from the upper/middle/lower parts of the airtight stainless steel box for concentration detection and change analysis, etc.; the whole experimental process can be passed through the airtight stainless steel box The camera in the body is used for real-time monitoring;

5. After the experiment is over, turn off the air inlet 9 with the sealed valve and the exhaust air outlet 10 with the sealed valve, turn off the water supply switch 11, and turn on the air pump connected to the exhaust air outlet 10 to discharge the experimental air in the airtight stainless steel box. gas;

6. Turn off the power switch 3.

Claims (10)

1. a fumigation simulation device for fumigation gas comprises the airtight casing of the sandwich type structure that has hermatic door, and at the function control box of ccontaining control in airtight casing one outside and operating system; It is characterized in that:

In airtight casing, be provided with heat-exchanging part, in the inner bag of airtight casing and the interlayer between the shell, be filled with insulation material; A lower wall and a sidewall respectively have 1 sampler mouth that penetrates insulation material and shell on airtight box liner; On the wall of airtight box liner, also have the sample introduction gas port, counter sample gas port, air inlet, exhaust air outlet and the steam inlet that penetrate insulation material and shell;

Comprise on the front panel of the function control box of described ccontaining control and operating system and be provided with color touch screen, data-interface and the power switch that is connected with microcomputer control system; And be provided with Pneumatic quick connector the sample introduction gas port, have the counter sample gas port of Pneumatic quick connector and have 3 sampler mouths of Pneumatic quick connector; Wherein: 3 sampler mouths respectively the gas conduit by separately independently with the last lower wall of airtight box liner and the sampler mouth on the sidewall is corresponding one by one is connected, the sample introduction gas port is connected with sample introduction gas port on the airtight casing wall of inner container by gas conduit, and the counter sample gas port is connected with counter sample gas port on the airtight casing wall of inner container by gas conduit;

Below the function control box of ccontaining control and operating system, be provided with water tank, on the wall of water tank, have water tank outlet and water inlet.

2. fumigation simulation device for fumigation gas according to claim 1 is characterized in that: the sample introduction gas port that has on the wall of described airtight box liner is to open respectively on the different walls of airtight box liner with the counter sample gas port.

3. fumigation simulation device for fumigation gas according to claim 1, it is characterized in that: the air inlet of being opened on the described airtight casing wall of inner container is out the upper wall at airtight box liner, and is connected with the air inlet that has sealed valve that is located at airtight casing back by pipeline;

The exhaust air outlet of being opened on the described airtight casing wall of inner container is out at the middle part of a sidewall of airtight box liner, and is connected with the exhaust air outlet that has sealed valve that is located at airtight casing back by pipeline.

4. fumigation simulation device for fumigation gas according to claim 1, it is characterized in that: the described sample introduction gas port that has a Pneumatic quick connector, have the counter sample gas port of Pneumatic quick connector and have 3 sampler mouths of Pneumatic quick connector, the Pneumatic quick connector that passes through separately is connected with small-sized gas circulator respectively, injects airtight casing or the gas in the airtight casing is derived sampling to carry out fumigating gas.

5. fumigation simulation device for fumigation gas according to claim 1 is characterized in that: described fumigation simulation device for fumigation gas is provided with video line interface and electric source line interface;

In the described airtight casing camera is installed, the logarithmic output signal of camera links to each other with computer monitor by the video line interface according to line.

6. fumigation simulation device for fumigation gas according to claim 1, it is characterized in that: described microcomputer control system is according to the humiture parameter in the airtight casing that is provided with by color touch screen in advance, and according to the software program of micro computer automatically the heat-exchanging part in the airtight casing of control temperature variation and enter quantity of steam in the airtight casing by steam inlet, controlling the humiture in the airtight casing, and by humiture data and humiture operation curve in the airtight casing of color touch screen instant playback.

7. according to claim 1 or 6 described fumigation simulation device for fumigation gas, it is characterized in that: by the temperature range in the airtight casing of heat-exchanging part control be: 5～55 ℃, control accuracy is: ± 1 ℃; Entering the relative humidity scope that the quantity of steam in the airtight casing controls in the airtight casing by steam inlet is: 30%～98%, and control accuracy is: ± 5%.

8. fumigation simulation device for fumigation gas according to claim 7, it is characterized in that: the heat-exchanging part in the described airtight casing is made of heating tube and refrigerating evaporator, and heating tube and the pipeline of refrigerating evaporator penetrate insulation material and shell and closed box external heating and refrigeration control system and link to each other respectively; Wherein, heating tube is to adopt the finned heating tube heating of military products grade stainless steel, and refrigerating evaporator is the compressor cooling mode;

Described steam inlet place is equipped with steam pipe, is provided with valve on the external steam pipe of closed box.

9. according to claim 1,2,3,4,5,6 or 8 described fumigation simulation device for fumigation gas, it is characterized in that: in the described airtight casing circulating fan is installed.

10. fumigation simulation device for fumigation gas according to claim 9 is characterized in that: the inner bag of described airtight casing all is up and down 90 degree right angles.

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