A multifunctional fully automatic gas sampling system

Abstract

The present invention discloses a multifunctional fully automatic gas sampling system, including a Suma tank sampling device and an aldehyde-ketone tube sampling device; the Suma tank sampling device includes a filter, the inlet end of the filter is connected to the air inlet, and the outlet end of the filter is connected to a distribution valve and multiple groups of direct sampling devices; the direct sampling device includes a solenoid valve, a pressure gauge, a flow controller and a Suma tank connected in sequence; multiple groups of non-directly connected Suma tank sampling devices are connected to the outlet end of the distribution valve; the aldehyde-ketone tube sampling device includes an aldehyde-ketone tube, one end of the aldehyde-ketone tube is connected to the air inlet, the other end of the aldehyde-ketone tube is connected to one end of the flow controller, and the other end of the flow controller is connected to an air pump. The advantages of the present invention are: it can realize multi-channel sample collection, can collect up to 16 Suma tanks and 2 groups of aldehyde-ketone tubes at the same time, support serial sampling, parallel sampling and parallel sampling, and is widely used.

Description

Technical Field

[0001] The invention relates to the technical field of instruments and meters, in particular to a gas collection device. Background Art

[0002] In the field of gas detection technology, sampling is crucial. How to automatically and reliably collect samples in the field through instruments and equipment is one of the goals that scientists have been pursuing and improving. Existing collection devices have single functions and rarely can achieve multi-functional and multi-mode sampling. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a multifunctional fully automatic gas sampling system, including a housing, multiple groups of direct-connected and non-direct-connected Suma can sampling devices and aldehyde-ketone tube sampling devices;

[0004] The Suma tank sampling device is provided with a filter, the inlet end of the filter is connected to the air inlet, and the outlet end of the filter is connected to multiple groups of direct-connected and indirect-connected sampling devices;

[0005] The direct-connect sampling device includes a solenoid valve, a pressure gauge, a flow controller and a Suma tank connected in sequence;

[0006] The non-direct sampling device is connected to the outlet end of the filter through a distribution valve; the distribution valve includes a central shaft connected to the output shaft of the motor, the central shaft is a hollow shaft, and a connecting hole is arranged radially of the central shaft, the connecting hole is connected to the air inlet channel on the valve body of the distribution valve, and each air inlet channel is connected to a Suma tank; the central shaft is connected to the filter through a pipeline; the non-direct sampling device also includes a solenoid valve, a pressure gauge, a flow controller and a Suma tank connected in sequence;

[0007] The aldehyde-ketone tube sampling device comprises an aldehyde-ketone tube, one end of which is connected to an air inlet, the other end of which is connected to one end of a flow controller, and the other end of the flow controller is connected to an air pump.

[0008] There are multiple Suma tanks, which are symmetrically arranged on both sides of the shell.

[0009] A single chip microcomputer is arranged in the shell, a display screen is arranged in the middle of the square of the shell, and the solenoid valve, flow controller, motor and display screen are all connected to the single chip microcomputer.

[0010] It also includes a meteorological collection instrument, which is connected to the single-chip microcomputer.

[0011] The advantages of the present invention are: it can realize multi-channel gas sample collection, can collect up to 16 Summa cans and 2 groups of aldehyde and ketone tubes at the same time, supports serial sampling, parallel sampling and parallel sampling, can be connected with any Summa cans and aldehyde and ketone tubes, and is widely used in routine monitoring sampling of VOCs, non-methane total hydrocarbons, aldehydes and ketones, emergency monitoring sampling, and single-point or batch sampling of ambient air. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the appearance structure of the present invention;

[0013] Figure 2 It is the principle diagram of the Suma tank sampling device of the present invention;

[0014] Figure 3 This is a schematic diagram of the principle of the aldehyde and ketone tube sampling device of the present invention;

[0015] Figure 4 It is a schematic diagram of the valve disc of the distribution valve;

[0016] Figure 5 This is a schematic diagram of the connection between the central axis of the distribution valve and the motor. DETAILED DESCRIPTION

[0017] The present invention is described in detail below with reference to the accompanying drawings. As shown in the drawings, the present invention includes a housing 12, including a Suma can sampling device and an aldehyde-ketone tube sampling device;

[0018] The Suma tank sampling device comprises a filter 2, the inlet end of the filter is connected to the air inlet 1, and the outlet end of the filter is connected to the distribution valve 4 and multiple groups of direct-connected sampling devices 3;

[0019] The direct-connected sampling device comprises a solenoid valve 6, a pressure gauge 7, a flow controller 8 and a Suma tank 9 which are connected in sequence;

[0020] Multiple groups of non-directly connected Suma tank sampling devices are connected to the outlet end of the distribution valve; the distribution valve includes a valve disc 21, on which multiple groups of air inlet channels 23 are arranged, and also includes a central shaft 22 connected to the output shaft of the motor 30, the central shaft is a hollow shaft, and a gas channel 24 is arranged inside

[0021] A connecting hole 25 is provided in the radial direction of the central axis, and the depth of the connecting hole is enough to communicate with the gas channel 25;

[0022] When the motor drives the central shaft to rotate, the connection hole 25 is connected to the air inlet channel 23 on the valve body of the distribution valve, and each air inlet channel is connected to a Suma tank; the air inlet channel of the central shaft is connected to the filter 2 through a pipeline; the non-direct connection sampling device includes a solenoid valve 6, a pressure gauge 7, a flow controller 8 and a Suma tank 9 connected in sequence;

[0023] The aldehyde-ketone tube sampling device includes an aldehyde-ketone tube 10, one end of the aldehyde-ketone tube is connected to the filter 2, the other end of the filter 2 is connected to the air inlet 1, the other end of the aldehyde-ketone tube is connected to one end of the flow controller 8, and the other end of the flow controller is connected to the vacuum pump 1.

[0024] There are multiple Suma tanks, which are symmetrically arranged on both sides of the shell.

[0025] A single chip microcomputer is arranged in the shell, a display screen 14 is arranged in the middle of the square of the shell, and the solenoid valve, flow controller, motor and display are all connected to the single chip microcomputer.

[0026] It also includes a meteorological collection instrument 13, which is connected to the single chip microcomputer.

[0027] The innovative features of the present invention are as follows:

[0028] 1. Flow controller: The current flow rate is calculated by measuring the pressure and temperature at both ends of the flow controller, and the flow rate is changed by controlling the size of the opening inside the flow controller. Advantages: The pressure inside the Suma tank is not constant. As the amount of gas collected increases, the pressure inside the tank will get closer and closer to the atmospheric pressure. Real-time pressure measurement changes the size of the opening to allow the sampling process to proceed at a constant flow rate.

[0029] 2. Equipped with meteorological data collection instruments, it can collect five meteorological parameters: wind speed, wind direction, temperature, humidity and atmospheric pressure. During the sampling process, it is monitored and recorded in real time for subsequent experimental analysis.

[0030] 3 The entire pipeline is silanized, which can eliminate the active groups on the surface of the carrier (mainly silanol groups) in gas chromatography to prevent tailing during the analysis process.

[0031] 4Using a combination of parallel and serial connection, each channel can be controlled individually, which is convenient for users.

[0032] 5 Aldehyde and ketone tube: The surface of the material is coated with spherical silica gel containing 2,4-dinitrophenylhydrazine to increase the adsorption capacity for aldehyde and ketone compounds.

[0033] 6. Distribution valve: The central axis of the distribution valve is driven by the motor to rotate. Every time it rotates a certain angle, the air inlet connected to the air outlet will change. When one tank is full, the distribution valve will rotate to connect the air path to the next tank, meeting the needs of users who want to collect multiple Suma tanks continuously.

[0034] Usage: Set the sampling time, sampling duration and sampling flow rate of each channel. When the set time is reached, the sampler starts to collect gas. Each channel can set sampling information independently. During the sampling process, the five meteorological parameters are recorded in real time to analyze the gas sample.

Claims

1. A multifunctional fully automatic gas sampling system, characterized in that: It includes a shell, multiple sets of direct-connected and indirect-connected Summa can sampling devices, and aldehyde-ketone tube sampling devices; The Suma tank sampling device is provided with a filter, the inlet end of the filter is connected to the air inlet, and the outlet end of the filter is connected to multiple groups of direct-connected and indirect-connected sampling devices; The direct-connect sampling device includes a solenoid valve, a pressure gauge, a flow controller and a Suma tank connected in sequence; The non-direct sampling device is connected to the outlet end of the filter through a distribution valve; the distribution valve includes a central shaft connected to the output shaft of the motor, the central shaft is a hollow shaft, and a connecting hole is arranged radially of the central shaft, the connecting hole is connected to the air inlet channel on the valve body of the distribution valve, and each air inlet channel is connected to a Suma tank; the central shaft is connected to the filter through a pipeline; the non-direct sampling device also includes a solenoid valve, a pressure gauge, a flow controller and a Suma tank connected in sequence; The aldehyde-ketone tube sampling device comprises an aldehyde-ketone tube, one end of which is connected to an air inlet, the other end of which is connected to one end of a flow controller, and the other end of the flow controller is connected to an air pump.

2. The multifunctional fully automatic gas sampling system according to claim 1 is characterized in that: There are multiple Suma tanks, which are symmetrically arranged on both sides of the shell.

3. The multifunctional fully automatic gas sampling system according to claim 1 is characterized in that: A single chip microcomputer is arranged in the shell, a display screen is arranged in the middle of the square of the shell, and the solenoid valve, flow controller, motor and display screen are all connected to the single chip microcomputer.

4. The multifunctional fully automatic gas sampling system according to claim 1 is characterized in that: It also includes a meteorological collection instrument, which is connected to the single-chip microcomputer.

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