Gas chromatograph for gas detection

Abstract

The utility model relates to the field of gas detection equipment, in particular to a gas chromatograph for gas detection, which comprises a rack, a gas inlet tank, a filtering tank and a gas chromatograph body are arranged on the rack, a piston is arranged in the gas inlet tank in a sliding manner, the gas inlet tank is provided with a gas inlet pipe, the gas inlet pipe is connected with an induced draft fan, and a telescopic mechanism is arranged outside the gas inlet tank. The telescopic mechanism is connected with the piston, a gas outlet valve is arranged at one end, far away from the telescopic mechanism, of the gas inlet tank, the gas outlet valve is provided with a steel wire hose connected with the filtering tank, an air filter element is arranged in the filtering tank, the filtering tank is provided with a conveying pipe, and the conveying pipe is connected with the gas chromatograph body. The gas chromatograph has the function of filtering an air sample, and the damage to the gas chromatograph is reduced.

Description

Technical Field

[0001] The utility model relates to the field of gas detection equipment, in particular to a gas chromatograph for gas detection. Background Art

[0002] Gas chromatographs are often used to detect gas components. The gas to be detected is released into the gas chromatograph. The working principle of the gas chromatograph is: the gas enters the packed column or capillary column. Due to the difference in the distribution or adsorption coefficient between the mobile phase (gas phase) and the stationary phase (liquid phase or solid phase) in the chromatographic column, the components in the sample are repeatedly distributed between the two phases under the flushing of the gas so that the components are separated in the column. Then, the detector connected to the column detects the components in order according to the physical and chemical properties of the components. However, when collecting gas samples, the gas is generally not filtered. The gas contains dust. The dust enters the gas chromatograph with the gas, which will cause dust accumulation. Over time, it will affect the accuracy of the gas chromatograph. Therefore, it is particularly necessary to develop a gas chromatograph for gas detection that can filter gas samples and reduce damage to the gas chromatograph. Summary of the invention

[0003] The utility model aims to provide a gas chromatograph for gas detection, which has the advantages of being able to filter gas samples and reduce damage to the gas chromatograph.

[0004] The technical solutions adopted are as follows:

[0005] A gas chromatograph for gas detection comprises a frame, on which an air inlet tank, a filter tank and a gas chromatograph body are arranged, a piston is slidably arranged in the air inlet tank, the air inlet tank is provided with an air inlet pipe, the air inlet pipe is connected to an induced draft fan, a telescopic mechanism is arranged outside the air inlet tank, the telescopic mechanism is connected to the piston, an air outlet valve is arranged at one end of the air inlet tank away from the telescopic mechanism, the air outlet valve is provided with a steel wire hose connected to the filter tank, an air filter element is arranged in the filter tank, the filter tank is provided with a delivery pipe, and the delivery pipe is connected to the gas chromatograph body.

[0006] Preferably, the telescopic mechanism is a hydraulic telescopic rod.

[0007] Preferably, the induced draft fan comprises an exhaust duct, an air inlet box is provided at the end of the exhaust duct, and a filter cloth is provided in the air inlet box.

[0008] Preferably, the air intake box is provided with a quick connector.

[0009] Preferably, a one-way valve is provided on the air intake pipe.

[0010] Preferably, an electric valve is provided on the delivery pipe.

[0011] Compared with the prior art, the beneficial effects are:

[0012] 1. The utility model uses an induced draft fan to introduce a gas sample into an air inlet tank and then uses a piston to push the gas into a filter tank. After filtering the gas sample using an air filter element in the filter tank, the gas sample is transported to a gas chromatograph, thereby reducing dust from entering the gas chromatograph and thus reducing damage to the gas chromatograph.

[0013] 2. The induced draft fan of the utility model comprises an exhaust duct, an air inlet box is arranged at the end of the exhaust duct, a filter cloth is arranged in the air inlet box, and the filter cloth performs preliminary filtration on the gas sample to filter out larger dust and impurities in the gas sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a gas chromatograph for gas detection in the utility model.

[0015] Figure 2 yes Figure 1 The structural diagram at A in the middle,

[0016] In the figure: 1, frame, 2, air inlet tank, 3, filter tank, 4, gas chromatograph body, 5, piston, 6, air inlet pipe, 7, induced draft fan, 8, one-way valve, 9, exhaust pipe, 10, air inlet box, 11, delivery pipe, 12, quick connector, 13, telescopic mechanism, 14, air outlet valve, 15, steel wire hose, 16, electric valve. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with specific embodiments. Figure 1 to Figure 2 As shown:

[0018] Embodiment 1: A gas chromatograph for gas detection comprises a frame 1, on which an air inlet tank 2, a filter tank 3 and a gas chromatograph body 4 are arranged, a piston 5 is slidably arranged in the air inlet tank 2, the piston 5 is slidably and sealedly connected to the inner wall of the air inlet tank 2, the air inlet tank 2 is provided with an air inlet pipe 6, the air inlet pipe 6 is arranged on the side of the air inlet tank 2, the air inlet pipe 6 is connected to an induced draft fan 7, and the induced draft fan 7 introduces gas into the air inlet tank 2 through the air inlet pipe 6,

[0019] A telescopic mechanism 13 is provided outside the air inlet tank 2, and the telescopic mechanism 13 is connected to the piston 5. The telescopic mechanism 13 is fixedly arranged on the frame 1, and the telescopic mechanism 13 pushes the piston 5 to slide in the air inlet tank 2. An air outlet valve 14 is provided at one end of the air inlet tank 2 away from the telescopic mechanism 13, and the air outlet valve 14 is provided with a steel wire hose 15 connected to the filter tank 3. The air outlet valve 14 controls the on-off between the air inlet tank 2 and the filter tank 3. An air filter element is provided in the filter tank 3, and the filter tank 3 is provided with a delivery pipe 11, and the delivery pipe 11 is connected to the gas chromatograph body 4.

[0020] The induced draft fan 7 introduces the gas sample into the air inlet tank 2 and then pushes the gas into the filter tank 3 by the piston 5. The gas sample is filtered by the air filter element in the filter tank 3 and then transported to the gas chromatograph to reduce dust entering the gas chromatograph.

[0021] Embodiment 2: A gas chromatograph for gas detection comprises a frame 1, on which an air inlet tank 2, a filter tank 3 and a gas chromatograph body 4 are arranged, a piston 5 is slidably arranged in the air inlet tank 2, the piston 5 is slidably and sealedly connected to the inner wall of the air inlet tank 2, the air inlet tank 2 is provided with an air inlet pipe 6, the air inlet pipe 6 is arranged on the side of the air inlet tank 2, the air inlet pipe 6 is connected to an induced draft fan 7, the induced draft fan 7 introduces gas into the air inlet tank 2 through the air inlet pipe 6, a one-way valve 8 is arranged on the air inlet pipe 6, the one-way valve 8 allows the gas to flow only from the induced draft fan 7 to the air inlet tank 2, and prevents the gas in the air inlet tank 2 from escaping from the air inlet pipe 6,

[0022] The induced draft fan 7 includes an exhaust pipe 9, an air inlet box 10 is provided at the end of the exhaust pipe 9, and a filter cloth is provided in the air inlet box 10. The filter cloth performs preliminary filtering on the gas sample to filter out larger dust and impurities in the gas sample. The air inlet box 10 is provided with a quick connector 12, which is used to connect the gas sample storage bottle.

[0023] A telescopic mechanism 13 is arranged outside the air inlet tank 2, and the telescopic mechanism 13 is a hydraulic telescopic rod. The telescopic mechanism 13 is connected to the piston 5, and the telescopic mechanism 13 is fixedly arranged on the frame 1. The telescopic mechanism 13 pushes the piston 5 to slide in the air inlet tank 2. An air outlet valve 14 is arranged at one end of the air inlet tank 2 away from the telescopic mechanism 13. The air outlet valve 14 is provided with a steel wire hose 15 connected to the filter tank 3. The air outlet valve 14 controls the on-off between the air inlet tank 2 and the filter tank 3. An air filter element is arranged in the filter tank 3. The filter tank 3 is provided with a delivery pipe 11. The delivery pipe 11 is connected to the gas chromatograph body 4. An electric valve 16 is arranged on the delivery pipe 11. The electric valve 16 controls the on-off between the filter tank 3 and the gas chromatograph.

[0024] The specific working process is as follows: when it is necessary to collect gas samples on site, start the induced draft fan 7, and the induced draft fan 7 transports the external gas to the interior of the air inlet tank 2. In this process, the filter cloth is used to preliminarily filter the impurities and dust in the gas, and then the piston 5 is used to push the gas into the filter tank 3. After the gas sample is filtered by the air filter element in the filter tank 3, it is transported to the gas chromatograph to reduce the dust entering the gas chromatograph. When the collected gas samples need to be collected, the gas sample storage bottle is connected to the quick connector 12, and then the induced draft fan 7 is started according to the above steps to enter the gas detection.

[0025] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A gas chromatograph for gas detection, characterized in that: The invention comprises a frame (1), wherein an air inlet tank (2), a filter tank (3) and a gas chromatograph body (4) are arranged on the frame (1), a piston (5) is slidably arranged in the air inlet tank (2), the air inlet tank (2) is provided with an air inlet pipe (6), the air inlet pipe (6) is connected to an induced draft fan (7), a telescopic mechanism (13) is arranged outside the air inlet tank (2), the telescopic mechanism (13) is connected to the piston (5), an air outlet valve (14) is arranged at one end of the air inlet tank (2) away from the telescopic mechanism (13), the air outlet valve (14) is provided with a steel wire hose (15) connected to the filter tank (3), an air filter element is arranged in the filter tank (3), the filter tank (3) is provided with a delivery pipe (11), and the delivery pipe (11) is connected to the gas chromatograph body (4).

2. A gas chromatograph for gas detection as claimed in claim 1, characterized in that: The telescopic mechanism (13) is a hydraulic telescopic rod.

3. A gas chromatograph for gas detection as claimed in claim 1, characterized in that: The induced draft fan (7) comprises an exhaust pipe (9), an air intake box (10) is arranged at the end of the exhaust pipe (9), and a filter cloth is arranged inside the air intake box (10).

4. A gas chromatograph for gas detection as claimed in claim 3, characterized in that: The air intake box (10) is provided with a quick connector (12).

5. A gas chromatograph for gas detection as claimed in claim 1, characterized in that: The air inlet pipe (6) is provided with a one-way valve (8).

6. A gas chromatograph for gas detection as claimed in claim 1, characterized in that: The delivery pipe (11) is provided with an electric valve (16).

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