阅读说明：本技术 一种杀虫及储藏养护气体调节装置及方法 (Device and method for regulating insecticidal and storage maintenance gas ) 是由 胡天明 于 2019-09-29 设计创作，主要内容包括：本发明公开了一种杀虫及储藏养护气体调节装置及方法,该装置包括空压机、空气净化装置、氮氧发生装置、流量控制器、杀虫室以及控氧PLC,所述空压机、空气净化装置、氮氧发生装置通过管路依次连接,氮氧发生装置包括第一出气口和第二出气口,第一出气口处安装有第一氧浓度传感器,第二出气口与流量控制器的进气口相连,流量控制器的出气口与杀虫室的进气口相连；杀虫室内安装有第二氧浓度传感器,控氧PLC与第一氧浓度传感器、流量控制器以及第二氧浓度传感器电连接。本发明调节装置可实现无极调节杀虫室内氧浓度,充氮置换时的浓度梯度不大,并可进行实时监控,快速将杀虫室内的氧浓度降至设定值,置换时间短,置换效率高。(The invention discloses a device and a method for regulating insecticidal and storage maintenance gas, wherein the device comprises an air compressor, an air purification device, a nitrogen-oxygen generation device, a flow controller, an insecticidal chamber and an oxygen control PLC (programmable logic controller), wherein the air compressor, the air purification device and the nitrogen-oxygen generation device are sequentially connected through a pipeline, the nitrogen-oxygen generation device comprises a first air outlet and a second air outlet, a first oxygen concentration sensor is installed at the first air outlet, the second air outlet is connected with an air inlet of the flow controller, and the air outlet of the flow controller is connected with an air inlet of the insecticidal chamber; and a second oxygen concentration sensor is arranged in the insect killing chamber, and the oxygen control PLC is electrically connected with the first oxygen concentration sensor, the flow controller and the second oxygen concentration sensor. The adjusting device can realize the stepless adjustment of the oxygen concentration in the insect killing room, has small concentration gradient during nitrogen charging and replacement, can carry out real-time monitoring, quickly reduces the oxygen concentration in the insect killing room to a set value, and has short replacement time and high replacement efficiency.)

1. An insect killing, storage and maintenance gas adjusting device is characterized by comprising an air compressor, an air purifying device, a nitrogen-oxygen generating device, a flow controller, an insect killing chamber and an oxygen control PLC (programmable logic controller), wherein the air compressor, the air purifying device and the nitrogen-oxygen generating device are sequentially connected through a pipeline; and a second oxygen concentration sensor is arranged in the insect killing chamber, and the oxygen control PLC is electrically connected with the first oxygen concentration sensor, the flow controller and the second oxygen concentration sensor.

2. The device as claimed in claim 1, wherein the air outlet of the flow controller is connected with the air inlet of a flow control proportional valve, the flow control proportional valve comprises a third air outlet and a fourth air outlet, the third air outlet is connected with the mixing tank in the insect killing chamber, the fourth air outlet is connected with the air inlet of a water bath humidifier, and the air outlet of the water bath humidifier is connected with the mixing tank in the insect killing chamber.

3. The apparatus of claim 2, wherein the mixing tank is provided with a tank humidity sensor, the valve of the flow control proportional valve is driven by a valve driving mechanism, and the humidity control PLC is electrically connected with the tank humidity sensor and the valve driving mechanism.

4. The device as claimed in claim 3, wherein a first pneumatic valve is arranged on a gas path connecting the third gas outlet of the flow control proportional valve and the mixing tank, a second pneumatic valve is arranged on a gas path connecting the water bath humidifier and the mixing tank, and the first pneumatic valve and the second pneumatic valve are electrically connected with the humidity control PLC.

5. The device of claim 1 wherein the insecticidal chamber has an exhaust pneumatic valve mounted thereon and a micro-pressure sensor mounted therein, the micro-pressure sensor being electrically connected to the exhaust pneumatic valve.

6. The device of claim 5, wherein a micro-pressure safety valve is further installed outside the insecticidal chamber.

7. The device of claim 2, wherein two ends of the mixing tank are respectively connected with a distribution pipe, and the distribution pipe is provided with a plurality of air outlets.

8. The device as claimed in claim 3 or 4, wherein an indoor humidity sensor is installed in the insect killing chamber, and the indoor humidity sensor is electrically connected with the humidity control PLC.

9. Method for insecticidal and stored curing gas conditioning using the device according to any of claims 1 to 8, characterized in that it comprises the following steps:

(1) when the nitrogen charging replacement is started, the nitrogen-oxygen generating device charges nitrogen at the maximum flow rate for replacement;

(2) in the nitrogen charging process, the oxygen control PLC compares the oxygen concentration values monitored by the first oxygen concentration sensor and the second oxygen concentration sensor in real time;

(3) when the oxygen concentration values monitored by the second oxygen concentration sensor and the first oxygen concentration sensor are consistent, the oxygen control PLC sends an instruction to the flow controller, and adjusts the flow controller to reduce the nitrogen flow at the outlet of the flow controller;

(4) and (4) repeating the steps (2) to (3) until the oxygen concentration value in the insect killing room reaches a preset value.

10. The method of claim 9, further comprising the steps of:

nitrogen at the air outlet of the flow controller passes through the air inlet of the flow control proportional valve, enters the mixing tank of the insect killing chamber from the third air outlet, enters the water bath humidifier from the fourth air outlet, and then enters the mixing tank;

the humidity control PLC controls a valve driving mechanism of the flow control proportional valve according to a humidity value detected by a tank humidity sensor in the mixing tank, so that the flow control proportional valve is adjusted to be in a valve state with appropriate dry and wet gases, and the humidity value in the mixing tank reaches a preset value;

an indoor humidity sensor in the insect killing room feeds back the humidity value in the insect killing room to a humidity control PLC, and the humidity control PLC finely adjusts the valve driving mechanism according to the feedback value;

if the dry gas or the wet gas is required to be independently opened or closed in a certain proportion, the humidity control PLC controls the flow control proportional valve to a proper opening position and then opens or closes the first pneumatic valve or the second pneumatic valve.

Technical Field

The invention relates to the technical field of disinsection and sterilization of files, in particular to a disinsection and storage maintenance gas adjusting device and method.

Background

The articles such as archives and cultural relics are easy to be damaged by insects and microorganisms after long-term storage, and the currently common insecticidal and bacteriostatic method is a nitrogen-filling and oxygen-reducing technology. Nitrogen is used for killing insects of files and books, and essentially nitrogen is filled to reduce oxygen for killing insects, because oxygen is an indispensable prerequisite for survival of all organisms, when the content of the oxygen is lower than a certain concentration, the physiological activities of pests for maintaining life cannot be normally carried out, the decomposition of substances in the bodies, metabolic activities and the activities of enzymes are seriously damaged, the physiological activities of the pests for maintaining life are stopped, and the pests die by suffocation due to lack of the oxygen.

However, the conventional nitrogen-filled displacement device generally directly uses nitrogen with target concentration, such as high-purity nitrogen with 0.1%, and at the moment, the nitrogen-producing flow of the nitrogen making machine is small, the displacement time is long, and the efficiency is the lowest. In addition, some nitrogen-filled replacement equipment adopts 3-section concentration control, the concentration gradient between the inside of the pest killing room and the nitrogen making machine is large, and the oxygen concentration condition in the pest killing room cannot be accurately judged. The mode can not carry out real-time concentration switching, easily causes the oxygen concentration in the insect killing room to be too high or too low, needs manual monitoring and carries out repeated adjustment, and the replacement time is longer.

In addition, traditional nitrogen replacement device that fills adopts single pass nitrogen gas usually, and the insecticidal room is gone into behind the nitrogen gas passing through the humidifier, and when the humidifier was not opened, nitrogen gas was too dry, and when the humidifier was opened, humidity was too big again, caused indoor humidity to fluctuate greatly easily, unable stable control humidity value. And when the air pressure in the insect killing chamber is 0-500Pa, the insect killing effect is best, the working pressure of the nitrogen-oxygen generating device is usually about 600Kpa, and the nitrogen-oxygen generating device is decompressed by the decompression valve and then filled into the insect killing chamber, but the situation that the pressure is too high due to too large flow or faults and the danger is generated is inevitable.

Disclosure of Invention

The invention aims to overcome the defects and shortcomings of the prior art and provides a device capable of infinitely adjusting the oxygen concentration in an insect killing room or a storage curing room.

Another object of the present invention is to provide a method for controlling the insecticidal and storage curing gases.

The purpose of the invention can be realized by the following technical scheme: a gas regulating device for disinsection, storage and maintenance comprises an air compressor, an air purification device, a nitrogen-oxygen generation device, a flow controller, a disinsection chamber and an oxygen control PLC (programmable logic controller), wherein the air compressor, the air purification device and the nitrogen-oxygen generation device are sequentially connected through a pipeline; and a second oxygen concentration sensor is arranged in the insect killing chamber, and the oxygen control PLC is electrically connected with the first oxygen concentration sensor, the flow controller and the second oxygen concentration sensor.

As a preferred technical scheme, an air outlet of the flow controller is connected with an air inlet of a flow control proportional valve, the flow control proportional valve comprises a third air outlet and a fourth air outlet, the third air outlet is connected with a mixing tank in the insect killing chamber, the fourth air outlet is connected with an air inlet of a water bath humidifier, and the air outlet of the water bath humidifier is connected with the mixing tank in the insect killing chamber.

As a preferred technical scheme, a tank interior humidity sensor is installed in the mixing tank, a valve of the flow control proportional valve is driven by a valve driving mechanism, and the humidity control PLC is electrically connected with the tank interior humidity sensor and the valve driving mechanism.

As a preferred technical scheme, a first pneumatic valve is installed on a gas path connecting a third gas outlet of the flow control proportional valve and the mixing tank, a second pneumatic valve is installed on a gas path connecting the water bath humidifier and the mixing tank, and the first pneumatic valve and the second pneumatic valve are electrically connected with the humidity control PLC.

As a preferable technical scheme, an exhaust pneumatic valve is installed outside the insect killing room, a micro-pressure sensor is installed in the insect killing room, and the micro-pressure sensor is electrically connected with the exhaust pneumatic valve. And a micro-pressure safety valve is also arranged outside the insecticidal chamber.

As the preferred technical scheme, both ends of the mixing tank are respectively connected with a distribution pipe, and a plurality of air outlets are arranged on the distribution pipes.

As a preferred technical scheme, an indoor humidity sensor is installed in the insect killing room and electrically connected with the humidity control PLC.

The other purpose of the invention can be realized by the following technical scheme: a method for regulating insecticidal and storage curing gas comprises the following steps: (1) when the nitrogen charging replacement is started, the nitrogen-oxygen generating device charges nitrogen at the maximum flow rate for replacement; (2) in the nitrogen charging process, the oxygen control PLC compares the oxygen concentration values monitored by the first oxygen concentration sensor and the second oxygen concentration sensor in real time; (3) when the oxygen concentration values monitored by the second oxygen concentration sensor and the first oxygen concentration sensor are consistent, the oxygen control PLC sends an instruction to the flow controller, and adjusts the flow controller to reduce the nitrogen flow at the outlet of the flow controller; (4) and (4) repeating the steps (2) to (3) until the oxygen concentration value in the insect killing room reaches a preset value.

As a preferred technical scheme, nitrogen at the air outlet of the flow controller passes through the air inlet of the flow control proportional valve, enters a mixing tank of the insect killing chamber from a third air outlet, enters the water bath humidifier from a fourth air outlet, and then enters the mixing tank; the humidity control PLC controls a valve driving mechanism of the flow control proportional valve according to a humidity value detected by a tank humidity sensor in the mixing tank, so that the flow control proportional valve is adjusted to be in a valve state with appropriate dry and wet gases, and the humidity value in the mixing tank reaches a preset value; an indoor humidity sensor in the insect killing room feeds back the humidity value in the insect killing room to a humidity control PLC, and the humidity control PLC finely adjusts the valve driving mechanism according to the feedback value; if the dry gas or the wet gas is required to be independently opened or closed in a certain proportion, the humidity control PLC controls the flow control proportional valve to a proper opening position and then opens or closes the first pneumatic valve or the second pneumatic valve.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. the adjusting device can realize the stepless adjustment of the oxygen concentration in the insect killing room or the storage and maintenance room, has small concentration gradient during nitrogen charging and replacement, can carry out real-time monitoring, quickly reduces the oxygen concentration in the insect killing room to a set value, and has short replacement time and high replacement efficiency.

2. The adjusting device divides the nitrogen into dry nitrogen and wet nitrogen, and achieves the aim of accurately adjusting the humidity in the insect killing room by adjusting the proportion of the dry nitrogen and the wet nitrogen, the humidity control is stable, and the fluctuation is avoided.

3. The adjusting device adopts double protection to the pressure in the insect killing room or the storage and maintenance room, namely the pressure can be adjusted by the joint control of the micro-pressure sensor and the air exhaust pneumatic valve, and the micro-pressure safety valve can be used for pressure relief when the pressure exceeds the maximum range. The whole pressure relief mode is simple and convenient, and the safety is high.

Drawings

FIG. 1 is a schematic view of a device for controlling an insecticidal and storage curing gas according to an embodiment of the present invention.

Wherein: 1: air compressor machine, 2: air cleaning device, 3: nitrogen-oxygen generating device, 4: flow controller, 5: an insect killing room, 6: oxygen control PLC, 7: flow control proportional valve, 8: water bath humidifier, 9: humidity control PLC, 10: valve drive mechanism, 11: first pneumatic valve, 12: second air-operated valve, 13: mixing tank, 14: distribution pipe, 15: indoor humidity sensor, 16: second oxygen concentration sensor, 17: micro-pressure sensor, 18: exhaust air-operated valve, 19: micro-pressure safety valve, 20: first oxygen concentration sensor, 21: a humidity sensor in the tank.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.

As shown in fig. 1, a gas conditioning device for disinsection, storage and maintenance comprises an air compressor, an air purification device, a nitrogen-oxygen generation device, a flow controller, a flow control proportional valve and a disinsection chamber. Air compressor machine, air purification device, nitrogen oxygen generating device connect gradually through the pipeline, and nitrogen oxygen generating device includes first gas outlet and second gas outlet, and first gas outlet department installs first oxygen concentration sensor, and the second gas outlet links to each other with flow controller's air inlet, and flow controller's air outlet links to each other with flow control proportional valve's air inlet. The flow control proportional valve comprises a third air outlet and a fourth air outlet, the third air outlet is connected with the mixing tank in the insect killing chamber, the fourth air outlet is connected with the air inlet of the water bath humidifier, and the air outlet of the water bath humidifier is connected with the mixing tank in the insect killing chamber.

A plurality of sensors are arranged in the insect killing room, and comprise an indoor humidity sensor, a second oxygen concentration sensor and a micro-pressure sensor. The two paths of nitrogen passing through the flow control proportional valve are mixed in a mixing tank of the insect killing chamber, an in-tank humidity sensor is installed in the mixing tank, two ends of the mixing tank are respectively connected with a distribution pipe, and a plurality of air outlets are formed in the distribution pipes. The distribution pipe can make the mixed nitrogen gas evenly fill in the disinsection room.

The oxygen control PLC is electrically connected with the first oxygen concentration sensor, the flow controller and the second oxygen concentration sensor. The humidity control PLC is electrically connected with the indoor humidity sensor, the in-tank humidity sensor and the valve driving mechanism. And a first pneumatic valve is arranged on a gas path connecting a third gas outlet of the flow control proportional valve and the mixing tank, a second pneumatic valve is arranged on a gas path connecting the water bath humidifier and the mixing tank, and the first pneumatic valve and the second pneumatic valve are electrically connected with the humidity control PLC.

An exhaust pneumatic valve is arranged outside the insect killing room, a micro-pressure sensor is arranged in the insect killing room, and the micro-pressure sensor is electrically connected with the exhaust pneumatic valve. A micro-pressure safety valve is also arranged outside the insecticidal chamber.

To the oxygen concentration control in the insecticidal chamber, this adjusting device is equipped with accuse oxygen PLC, and accuse oxygen PLC is connected with first oxygen concentration sensor, flow controller and second oxygen concentration sensor electricity. The oxygen concentration in the general insect killing room needs to be reduced from 21 percent to 0.1 percent. The first oxygen concentration sensor can monitor the oxygen concentration at the air outlet of the nitrogen-oxygen generating device, and the second oxygen concentration sensor can monitor the oxygen concentration in the insect killing room. When the nitrogen charging replacement is started, the flow rate of the flow controller is adjusted to the maximum value, and at the moment, the nitrogen oxygen generating device charges nitrogen at the maximum flow rate for replacement, the initial oxygen concentration of the generated nitrogen is 18 percent, and the nitrogen is used for replacing the air with the oxygen concentration of 21 percent in the insect killing room. In the nitrogen charging process, the oxygen control PLC compares the oxygen concentration value monitored by the second oxygen concentration sensor in the disinsection chamber with the oxygen concentration value monitored by the first oxygen concentration sensor in real time, when the oxygen concentration values monitored by the two sensors are consistent, the oxygen control PLC sends an instruction to the flow controller, and after receiving the instruction, the flow controller reduces the flow, namely the oxygen concentration of the nitrogen is reduced by one step. Then the above process is repeated, and the oxygen control PLC performs circulation control until the oxygen concentration in the insect killing room is reduced to the target value of 0.1%. The adjusting device of the invention has larger flow at the beginning of nitrogen charging replacement, the flow is gradually reduced along with the reduction of the concentration, the oxygen concentration is in direct proportion to the flow, and the replacement between different oxygen concentration gradients is realized by continuously adjusting the nitrogen flow, thereby achieving the purpose of quickly reducing the oxygen concentration value in the insect killing room to the set value. The regulation mode belongs to stepless regulation and has high nitrogen charging and replacing efficiency. The oxygen concentration is adjusted to be below 0.5 percent for killing insects, and the oxygen concentration is adjusted to be 2-5 percent for storing and maintaining cultural relics.

Aiming at the humidity control in the insect killing chamber, nitrogen at the air outlet of the flow controller passes through the air inlet of the flow control proportional valve, enters the mixing tank of the insect killing chamber from the third air outlet, enters the water bath humidifier from the fourth air outlet, and then enters the mixing tank. The flow control proportional valve divides the dry nitrogen into two paths, one path is the dry nitrogen, the other path is the saturated (100 RH%) wet nitrogen passing through the water bath humidifier, and the two paths of gases directly enter the mixing tank to be mixed. The humidity sensor is arranged in the mixing tank, detects the humidity value in the mixing tank and feeds back the humidity value to the humidity control PLC, the humidity control PLC compares the feedback value with a set value, if deviation exists, the humidity control PLC controls the valve driving mechanism of the flow control proportional valve, the proportion of dry nitrogen and wet nitrogen can be adjusted, and the humidity value in the mixing tank reaches the set value. Simultaneously, the indoor humidity sensor that sets up in the insecticidal chamber can feed back the wet PLC of accuse with the humidity value, and wet PLC of accuse control valve actuating mechanism finely tunes, makes the indoor humidity value of insecticidal more accurate. If the dry or wet nitrogen is required to be opened or closed independently under a certain proportion, the humidity control PLC controls the flow control proportional valve to a proper opening position and then opens or closes the first pneumatic valve or the second pneumatic valve.

Aiming at the control of the pressure in the disinsection chamber, a pressure sensor in the disinsection chamber is in linkage control with an exhaust pneumatic valve, and when the pressure in the disinsection chamber is higher, a valve of the exhaust pneumatic valve is opened, so that the pressure in the disinsection chamber is quickly reduced; when the pressure decreases, the valve of the exhaust pneumatic valve can be adjusted small. The exhaust pneumatic valve is always in an open state, and the opening of the valve is adjusted according to the pressure value in the insect killing room to maintain the pressure in the insect killing room in a reasonable range. In order to protect the inside of the insect killing chamber from overpressure doubly, a mechanical micro-pressure safety valve is further installed on the insect killing chamber, and when the pressure in the chamber exceeds the maximum value and the exhaust pneumatic valve cannot be adjusted, the micro-pressure safety valve can be opened to release pressure.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.