CN111397979B

CN111397979B - Plume sampling device and system

Info

Publication number: CN111397979B
Application number: CN202010230352.1A
Authority: CN
Inventors: 李金香; 粟京平; 程刚; 崔彤; 邹本东; 姜涛
Original assignee: Beijing Municipal Environmental Monitoring Center
Current assignee: Beijing Municipal Environmental Monitoring Center
Priority date: 2020-03-23
Filing date: 2020-03-23
Publication date: 2023-04-25
Anticipated expiration: 2040-03-23
Also published as: CN111397979A

Abstract

A plume sampling device and system, the device comprising: rotatable hoist and mount subassembly, electronic pod, vacuum box and lower seal assembly, rotatable hoist and mount subassembly sets up the top of electronic pod, be provided with the air pump in the electronic pod, the bottom of electronic pod with the top interconnect of vacuum box, the air pump be used for follow in the vacuum box bleed and to in the vacuum box exhaust, be provided with the gas sampling bag in the vacuum box, seal assembly sets up down the bottom of vacuum box and contains the air vent, the air vent with the air inlet of gas sampling bag is connected. The invention can realize the air, mobile tracking and sampling of smoke plumes.

Description

Plume sampling device and system

Technical Field

The invention relates to the field of environmental protection and emergency monitoring of emergency environmental events, in particular to a smoke plume sampling device and a smoke plume sampling system.

Background

The high-temperature harmful gas generated by fire and explosion can easily form a large amount of smoke plume when the exhaust gas discharged by the exhaust gas cylinder of the incinerator collides with the air. The smoke plume has potential harm to the ecological environment and human health. The existing atmospheric sampling and analyzing instrument generally collects or analyzes gas at a height of 1.2-1.5 meters from the ground. Because the smoke plumes are suspended in the air, the smoke plumes are often more than 10 meters away from the ground and move along with wind, and a suitable monitoring means is lacking at present.

Disclosure of Invention

First, the technical problem to be solved

Accordingly, an object of the present invention is to provide a smoke plume sampling device and system, which solve at least one of the above problems in the prior art.

(II) technical scheme

In one aspect, the present invention provides a plume sampling device comprising: rotatable hoist and mount subassembly, electronic pod, vacuum box and lower seal assembly, rotatable hoist and mount subassembly sets up the top of electronic pod, be provided with the air pump in the electronic pod, the bottom of electronic pod with the top interconnect of vacuum box, the air pump be used for follow in the vacuum box bleed and to in the vacuum box exhaust, be provided with the gas sampling bag in the vacuum box, seal assembly sets up down the bottom of vacuum box and contains the air vent, the air vent with the air inlet of gas sampling bag is connected.

In some embodiments, the electronic pod includes a wireless transmission module for receiving instructions from a terminal controller and transmitting to the control circuit for controlling operation of the air pump.

In some embodiments, the electronic pod includes one or both of a temperature sensor for detecting a plume ambient temperature, and a pressure sensor for detecting a pressure within the vacuum box.

In some embodiments, the electronic pod includes an automatic controller that automatically controls operation of the air pump based on a temperature detected by a temperature sensor and a pressure detected by the pressure sensor.

In some embodiments, the bottom of the electronic pod is provided with a ventilation interface connected to the air pump by a pipeline, preferably the air pump is a diaphragm pump.

In some embodiments, the pipeline is provided with a gas path switching valve, preferably, the gas path switching valve is a two-position five-way electromagnetic valve.

In some embodiments, the top of the vacuum box is provided with a vent interface, which is connected to a vent interface at the bottom of the electronic pod by a pipeline.

In some embodiments, the rotatable hoisting assembly comprises a hoisting ring, a connecting column and a clamping block, wherein two ends of the connecting column are respectively connected with the hoisting ring and the clamping block, and the clamping block is embedded into a clamping groove at the top of the electronic nacelle.

In some embodiments, the exterior of the vacuum box is covered with a rubber guard ring and the exterior of the lower seal assembly is covered with a rubber base sleeve.

In some embodiments, the materials of the electronic pod, the vacuum box, and the lower seal assembly are high temperature resistant resins, such as polyimide resins.

In some embodiments, the gas sampling bag is made of Polytetrafluoroethylene (PTFE) or polyvinylidene fluoride (PVDF).

In another aspect, the invention provides a plume sampling system comprising an aircraft and the plume sampling device, wherein a rotatable hoisting assembly of the plume sampling device is fixed on the aircraft, preferably the aircraft is an unmanned plane.

(III) beneficial effects

Through the technical scheme, the smoke plume sampling device and the smoke plume sampling system have the beneficial effects compared with the prior art that:

(1) The invention provides a novel sampling device and a sampling method, which fill the blank of smoke plume emergency sampling and monitoring in an emergency environment event;

(2) Realizing the air, mobile tracking and sampling of smoke plumes;

(3) Remote control and bidirectional communication of the sampler are realized;

(4) The gas sample directly enters the air bag, so that the interference of the sampling pump on the gas component is avoided;

(5) By means of the unmanned aerial vehicle flight platform, the smoke plume sampling device has the capability of being arranged rapidly.

Drawings

The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention. Wherein:

FIG. 1 is a schematic diagram of a plume sampling device in an embodiment of the invention;

FIG. 2 is a schematic view of a rotatable lifting assembly in accordance with an embodiment of the present invention;

FIG. 3 is a schematic view of an electronic pod in an embodiment of the invention;

FIG. 4 is a schematic diagram of the circuit connections of the electronic pod built-in components in an embodiment of the invention;

FIG. 5 is a schematic diagram of the piping connection of the plume sampling device in an embodiment of the present invention;

FIG. 6 is a schematic view of a vacuum box in an embodiment of the invention;

FIG. 7 is a schematic view of a lower seal assembly in an embodiment of the invention;

reference numerals illustrate:

1-a rotatable hoisting assembly;

11-hanging rings; 12-connecting columns; 13-clamping blocks;

2-an electronic pod;

21-a clamping groove; 22-cell; 23-diaphragm pump; 24-two-position five-way solenoid valve; 25-a pressure sensor; 26-relay; 27-a temperature sensor; 28-a wireless transmission module;

3-vacuum box;

31-a ventilation interface; 32-a gas sampling bag;

4-a lower seal assembly;

41-vent.

Detailed Description

The present invention will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or the like described in the embodiment is included in at least one embodiment according to the present invention. Thus, references to "one embodiment according to the present invention," "in an embodiment," and the like, in this specification are not intended to specify the presence of stated features but rather are intended to be included in particular embodiments, if they are used in the same sense. It will be appreciated by those of skill in the art that the specific features, structures, etc. disclosed in one or more of the embodiments of the invention may be combined in any suitable manner.

In the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.

As shown in fig. 1, the plume device in the embodiment of the present invention includes: rotatable hoist assembly 1, electronic pod 2, vacuum box 3 and lower seal assembly 4 are provided with the air vent on the lower seal assembly 4. The electronic pod 2, the vacuum box 3 and the lower sealing assembly 4 can be made of high-temperature resistant resin (such as polyimide resin), can bear the high temperature of 220 ℃ and have lighter weight.

The plume sampling device may also include a rubber guard ring and a rubber base. The rubber protection ring is sleeved outside the vacuum box and used for protecting the vacuum box and reducing vibration, and the rubber base is sleeved outside the lower sealing assembly 4 and used for protecting the lower sealing assembly 4 and reducing vibration caused by collision; the rubber protection ring and the rubber base can bear the high temperature of 200 ℃.

The rotatable hoisting assembly 1 is arranged at the top of the electronic nacelle 2, as shown in fig. 2, the rotatable hoisting assembly 1 comprises a hoisting ring 11, a connecting column 12 and a clamping block 13, the two ends of the connecting column 12 are respectively connected with the hoisting ring 11 and the clamping block 13, and the hoisting ring 11 can be fixed on an aircraft (such as an unmanned aerial vehicle) through ropes for high-altitude gas sampling. The clamping block 13 is embedded into a clamping groove 21 on the top of the electronic nacelle 2, and the electronic nacelle 2 and the rotatable hoisting assembly 1 can rotate relatively. Preferably, the suspension point of the rotatable hoisting assembly 1 is located on the axis of gravity of the plume sampling device, which is free to rotate in a direction perpendicular to the ground.

As shown in fig. 3, the outer shape of the electronic nacelle 2 is in a streamline design to reduce air resistance and avoid affecting flight stability. The electronic pod 2 is internally provided with a battery 22, a diaphragm pump 23, a two-position five-way electromagnetic valve 24, a pressure sensor 25, a relay 26, a temperature sensor 27, a wireless transmission module 28, a control circuit and other elements, and fig. 4 is a schematic circuit connection diagram of each element in the electronic pod 2.

The battery 22 may be a lithium battery that powers the various components in the electronic pod 2. The relay 26 may control the operation of the diaphragm pump 23 according to the control signal.

The temperature sensor 27 in the electronic pod 2 can measure the ambient temperature around the plume in real time. In one embodiment, the temperature sensor 27 may be a platinum resistor (PT 100).

The wireless transmission module 28 in the electronic pod 2 has a two-way communication function, can remotely receive instructions, and feeds back the working state. In one embodiment, the wireless transmission module 28 supports a 4G communication network, and can receive instructions from the terminal controller and feed back the instructions to the control circuit to remotely set the operation mode (e.g., pumping or exhausting) of the electronic pod 2, the operation flow rate, and the start-up time. At the same time, the wireless transmission module 28 feeds back the operating state of the electronic pod 2 to the terminal controller.

In one embodiment, the terminal controller may be a smart phone, APP software in which the plume sampling device is installed, or wireless communication with the electronic pod 2 is implemented through application software such as WeChat.

The bottom of the electronic nacelle 2 is provided with a ventilation interface for connecting to a vacuum box 3. As shown in fig. 5-7, the diaphragm pump 23 is connected with the two-position five-way electromagnetic valve 24 through a pipeline, the two-position five-way electromagnetic valve 24 is connected with a ventilation interface at the bottom of the electronic pod 2 through a pipeline, a pressure sensor 25 is arranged on the pipeline, a ventilation interface 31 is arranged at the top of the vacuum box 3, the connection with the ventilation interface at the bottom of the electronic pod 2 can be realized, and the bottom of the vacuum box 3 is sealed by using the lower sealing component 4. The diaphragm pump 23 and the two-position five-way electromagnetic valve 24 act to realize the switching of the air suction state and the air discharge state of the vacuum box 3, and the flow of the diaphragm pump 23 can be set according to actual requirements.

The pressure sensor 25 arranged in the electronic pod 2 can automatically monitor the pressure in the vacuum box 3, so that the pressure in the vacuum box 3 is controlled in a reasonable range, and the damage of the gas sampling bag 32 caused by excessive negative pressure is prevented.

In another embodiment, instead of the terminal controller, an automatic controller may be used in the electronic pod 2, and when the temperature detected by the temperature sensor 27 exceeds a predetermined temperature, the automatic controller may automatically start the diaphragm pump 23 to sample, and automatically adjust the pressure in the vacuum tank 3 according to the pressure detected by the pressure sensor 25.

A gas sampling bag 32 is arranged in the vacuum box 3, and the gas sampling bag 32 can be made of Polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF) and the like; the air inlet of the gas sampling bag 32 is connected to the vent 41 (shown in fig. 7) of the lower seal assembly 4, and the gas sampling bag 32 can be replaced by opening the lower seal assembly 4. The diaphragm pump 23 can realize the switching of the air suction and exhaust states, so that the internal pressure of the box body of the vacuum box 3 is changed, and the air sampling bag 32 in the vacuum box 3 is emptied and inflated. Thus, gas may enter the gas sampling bag 32 directly without passing through the sampling pump, and the gas sampling time period of the gas sampling bag 32 may be set.

The smoke plume sampling device provided by the invention can be conveniently hoisted on the unmanned aerial vehicle flight platform, and can quickly lift off and track smoke plumes.

In one embodiment, the smoke plume sampling device is fixed under the wing of the unmanned aerial vehicle through the rope, and the unmanned aerial vehicle flies above the smoke plume while tracking the smoke plume, so that the damage of the smoke plume to the unmanned aerial vehicle is avoided.

A PTFE gas sampling bag is arranged in a vacuum box of the smoke plume sampling device. Wherein the inlet of the gas sampling bag is connected with the vent hole of the lower sealing component at the bottom of the vacuum box and is connected with the atmosphere. By changing the pressure in the vacuum box, the positive pressure can be used for evacuating the gas sampling bag, and the negative pressure can be used for collecting gas samples in the gas sampling bag.

After receiving control software or a micro-communication instruction of the smoke sampling device, an electronic pod in the smoke sampling device controls a diaphragm pump and a two-position five-way electromagnetic valve to work, changes and monitors the pressure state of a vacuum box, and is used for realizing sampling and emptying of a gas sampling bag. And cleaning of the gas sampling bag can be completed through multiple sampling and emptying. The electronic pod feeds back information such as working state (sampling/emptying), gas temperature and the like to the plume sampling device control software, and the wireless transmission module is used for realizing two-way communication between the electronic pod and the plume sampling device control software.

Therefore, the invention can realize the aerial and mobile tracking sampling of the smoke plume, and is particularly suitable for the emergency sampling and monitoring of the smoke plume in the emergency environment event.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the invention thereto, but to limit the invention thereto, and any modifications, equivalents, improvements and equivalents thereof may be made without departing from the spirit and principles of the invention.

Claims

1. A plume sampling device suitable for moving tracking sampling of plumes, comprising: the electronic device comprises a rotatable hoisting assembly, an electronic nacelle, a vacuum box and a lower sealing assembly, wherein the rotatable hoisting assembly is arranged at the top of the electronic nacelle, an air pump is arranged in the electronic nacelle, the bottom of the electronic nacelle is connected with the top of the vacuum box, the air pump is used for exhausting air from and into the vacuum box, the air pump can realize the switching of the air exhausting and air exhausting states, a gas sampling bag is arranged in the vacuum box, the lower sealing assembly is arranged at the bottom of the vacuum box and comprises an air vent, and the air vent is connected with an air inlet of the gas sampling bag;

the rotatable hoisting assembly comprises a hoisting ring, a connecting column and a clamping block, wherein two ends of the connecting column are respectively connected with the hoisting ring and the clamping block, the clamping block is embedded into a clamping groove at the top of the electronic nacelle, a hanging point of the rotatable hoisting assembly is positioned on a concentric axis of the smoke plume sampling device, and the smoke plume sampling device freely rotates in a direction perpendicular to the ground;

the appearance of the electronic nacelle adopts streamline design, and the vacuum box is in a cylindrical shape;

a temperature sensor is arranged in the electronic hanging cabin and is suitable for measuring the temperature of the environment around the smoke plume, and the air pump is started to sample in response to the temperature detected by the temperature sensor exceeding a preset temperature;

the electronic pod comprises a wireless transmission module and a control circuit, wherein the control circuit is used for controlling the operation of the air pump, the wireless transmission module has a two-way communication function, the wireless transmission module can remotely accept instructions and feed back working states, and the control circuit responds to the received instructions to control the air suction or the air discharge of the electronic pod;

the electronic hanging cabin is internally provided with a two-position five-way electromagnetic valve, the air pump and the two-position five-way electromagnetic valve act to realize the switching of exhausting from the vacuum box to the vacuum box, so as to realize the emptying and inflation of the gas sampling bag, the setting of sampling duration and the completion of cleaning of the gas sampling bag.

2. The plume sampling device of claim 1, wherein the electronic pod further comprises a pressure sensor.

3. The plume sampling device of claim 2, wherein the electronic pod comprises an automatic controller that automatically controls operation of the air pump based on a temperature detected by a temperature sensor and a pressure detected by the pressure sensor.

4. The plume sampling device according to claim 1, wherein a bottom of the electronic pod is provided with a ventilation interface, which is connected with the air pump by a pipeline.

5. The plume sampling device of claim 4, wherein the air pump is a diaphragm pump.

6. The plume sampling device of claim 4, wherein a vent interface is provided at the top of the vacuum box, the vent interface being connected with a vent interface at the bottom of the electronic pod by a pipeline.

7. The plume sampling device of claim 1, wherein the exterior of the vacuum box is covered with a rubber guard ring and the exterior of the lower seal assembly is covered with a rubber base sleeve.

8. The plume sampling device of claim 1, wherein the materials of the electronic pod, the vacuum box and the lower seal assembly are high temperature resistant resins.

9. The plume sampling device of claim 8, wherein the high temperature resistant resin comprises a polyimide resin; the gas sampling bag is made of polytetrafluoroethylene or polyvinylidene fluoride.

10. A plume sampling system comprising an aircraft and the plume sampling device of any one of claims 1 to 9, wherein a rotatable hoisting assembly of the plume sampling device is fixed to the aircraft.

11. The plume sampling system of claim 10, wherein the aircraft is an unmanned aircraft.