CN211927806U - Sample introduction pretreatment device of chromatographic analysis instrument - Google Patents
Sample introduction pretreatment device of chromatographic analysis instrument Download PDFInfo
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- CN211927806U CN211927806U CN201922229335.1U CN201922229335U CN211927806U CN 211927806 U CN211927806 U CN 211927806U CN 201922229335 U CN201922229335 U CN 201922229335U CN 211927806 U CN211927806 U CN 211927806U
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Abstract
The utility model discloses a sample introduction pretreatment device of a chromatographic analysis instrument, which comprises a filter, a sample drying pipeline, a constant temperature buffer cavity and a multi-channel flow velocity valve; the sample enters a filter in advance, impurities in the sample are washed and filtered through the filter and then removed, and the filtered sample enters a sample drying pipeline; detecting the humidity in the gas sample through a humidity sensor, controlling a heater through a control system to enable a heating circulating pipe to generate heat, and heating and drying the sample; the dried sample enters a constant temperature buffer cavity, the temperature of the sample gas is adjusted to the optimal state temperature through a heat exchange pipeline, the sample enters from an inlet with a small diameter and then slowly diffuses to the rear end of the constant temperature buffer cavity, the gas flow rate is adjusted, and the gas can slowly and uniformly enter a multi-channel flow rate valve; the electromagnetic control switch is used for controlling the outlet flow of the multi-channel flow rate valve, and the gas sample is slowly introduced into the chromatographic analyzer through the multi-channel flow rate valve.
Description
Technical Field
The utility model relates to a chromatographic analysis instrument technical field specifically is a chromatographic analysis instrument advances a kind preprocessing device.
Background
Chromatography, also known as chromatography, is a high-performance physical separation technique that is used in analytical chemistry in conjunction with appropriate detection means to produce chromatographic analysis. The chromatographic analyzer is an instrument for qualitatively and quantitatively analyzing substances by using chromatography and researching physical and chemical properties of the substances. Comprises a sample introduction system, a detection system, a recording and data processing system, a temperature control system, a mobile phase control system and the like. Modern chromatographs have the characteristics of high stability, sensitivity, versatility, high degree of automation and the like. The types include gas chromatography, liquid chromatography, gel chromatography, and the like. These chromatographs are widely used for analyzing the contents of chemical products and high molecular materials, and gel chromatography can also measure the molecular weight and distribution of the high molecular materials.
In gas chromatography, sample injection is one of the major sources of quantitative analysis error. The principle, structure, materials, sample temperature, sample volume, sample speed, and sample tool of the sample system can directly influence the qualitative and quantitative repeatability and accuracy of gas chromatography. In actual analysis, because the gas, liquid, solid and state of the sample are different, the analysis purpose is different, the requirement is different, and the instability of the sample injection system is also influenced, the sample needs to be pretreated before sample injection.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a kind preprocessing device is advanced to chromatographic analysis instrument to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a kind of chromatographic analysis instrument advances the sample preprocessing device, including filter, sample dry tube, thermostatical buffer chamber and multi-channel flow rate valve; the filter is provided with a sample inlet, the sample inlet is connected with a sample input pipeline, the tail end of the filter is provided with an output port, and the output port is connected to a sample drying pipeline; a heating circulating pipe is arranged in the sample drying pipeline, and the tail end of the heating circulating pipe is connected to the heater; the other end of the sample drying pipeline is connected to a constant-temperature buffer cavity, a constant-temperature heat exchange tube is arranged outside the constant-temperature buffer cavity, and heat exchange oil is filled in the constant-temperature heat exchange tube; the heat-insulating layer is arranged on the outer side of the constant-temperature heat exchange tube, and the tail end of the constant-temperature heat exchange tube is connected to the heat exchanger; the tail end of the constant-temperature buffer cavity is connected to a multi-channel flow velocity valve, an electromagnetic control switch is arranged in the multi-channel flow velocity valve, and the tail end of the multi-channel flow velocity valve is connected to a sample introduction pipeline.
Preferably, the filter adopts a gas filter, and a multi-element filter element and a back washing mechanism are arranged in the filter.
Preferably, the heating circulating pipe is S-shaped and horizontally distributed in the sample drying pipeline, a humidity sensor is arranged in the sample drying pipeline, the humidity sensor is connected to a control system, and the control system is connected to the heater.
Preferably, the constant-temperature buffer cavity is of a conical structure with a narrow inlet and a wide outlet, a temperature sensor is arranged in the constant-temperature buffer cavity, the temperature sensor is connected to a control system, and the control system is connected to the heat exchanger.
Preferably, the multichannel flow rate valve includes that mainstream leads to pipeline and multichannel and derives the pipeline, and mainstream leads to pipeline one end and is connected to constant temperature buffer chamber, and the pipeline is derived to the mainstream logical pipeline other end is provided with the multichannel, and electromagnetic control switch sets up in the pipeline is derived to the multichannel, and electromagnetic control switch is connected to control system.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model has simple structure, and can pre-process the sample, thereby ensuring the sample introduction uniformity of the gas chromatograph and meeting the standard; the sample enters a filter in advance, impurities in the sample are washed and filtered through the filter and then removed, and the filtered sample enters a sample drying pipeline; detecting the humidity in the gas sample through a humidity sensor, controlling a heater through a control system to enable a heating circulating pipe to generate heat, and heating and drying the sample; the dried sample enters a constant temperature buffer cavity, the temperature of the sample gas is adjusted to the optimal state temperature through a heat exchange pipeline, the sample enters from an inlet with a small diameter and then slowly diffuses to the rear end of the constant temperature buffer cavity, the gas flow rate is adjusted, and the gas can slowly and uniformly enter a multi-channel flow rate valve; the electromagnetic control switch is used for controlling the outlet flow of the multi-channel flow rate valve, and the gas sample is slowly introduced into the chromatographic analyzer through the multi-channel flow rate valve.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1. a filter; 2. a sample input conduit; 3. an output port; 4. a sample drying pipeline; 5. a heating circulation pipe; 6. a heater; 7. a constant temperature buffer chamber; 8. a constant temperature heat exchange pipe; 9. exchanging hot oil; 10. a heat-insulating layer; 11. a heat exchanger; 12. a multi-channel flow rate valve; 13. an electromagnetic control switch; 14. a sample introduction pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Referring to fig. 1, the present invention provides a technical solution: a kind of chromatographic analysis instrument advances the sample preprocessing device, including filter 1, sample dry tube 4, thermostatical buffer chamber 7 and multi-channel flow rate valve 12; the filter 1 is provided with a sample inlet, the sample inlet is connected with a sample input pipeline 2, the tail end of the filter 1 is provided with an output port 3, and the output port 3 is connected with a sample drying pipeline 4; a heating circulating pipe 5 is arranged in the sample drying pipeline 4, and the tail end of the heating circulating pipe 5 is connected to a heater 6; the other end of the sample drying pipeline 4 is connected to a constant-temperature buffer cavity 7, a constant-temperature heat exchange pipe 8 is arranged on the outer side of the constant-temperature buffer cavity 7, and heat exchange oil 9 is filled in the constant-temperature heat exchange pipe 8; the outer side of the constant-temperature heat exchange tube 8 is provided with a heat preservation layer 10, and the tail end of the constant-temperature heat exchange tube 8 is connected to a heat exchanger 11; the tail end of the constant temperature buffer cavity 7 is connected to a multi-channel flow velocity valve 12, an electromagnetic control switch 13 is arranged in the multi-channel flow velocity valve 12, and the tail end of the multi-channel flow velocity valve 12 is connected to a sample introduction pipeline 14.
Further, the filter 1 is a gas filter, and a multi-element filter element and a back washing mechanism are arranged in the filter 1.
Further, the heating circulation pipe 5 is horizontally distributed in the sample drying pipeline in an S shape, a humidity sensor is arranged in the sample drying pipeline 4 and connected to a control system, and the control system is connected to the heater 6.
Furthermore, the constant temperature buffer chamber 7 is a conical structure with a narrow inlet and a wide outlet, a temperature sensor is arranged in the constant temperature buffer chamber 7, the temperature sensor is connected to a control system, and the control system is connected to the heat exchanger 11.
Further, multichannel velocity of flow valve 12 includes that mainstream leads out the pipeline with the multichannel, and mainstream leads out pipeline one end and is connected to constant temperature buffer chamber, and the pipeline is derived to the mainstream through pipeline other end is provided with the multichannel, and solenoid electric switch 13 sets up in the pipeline is derived to the multichannel, and solenoid electric switch 13 is connected to control system.
The working principle is as follows: the filter 1 is provided with a sample inlet, the sample inlet is connected with a sample input pipeline 2, the tail end of the filter 1 is provided with an output port 3, the output port 3 is connected with a sample drying pipeline 4, the filter 1 adopts a gas filter, a multi-element filter element and a back washing mechanism are arranged in the filter 1, a sample enters the filter 1 in advance, impurities in the sample are washed and filtered through the filter 1, then the sample is removed, and the filtered sample enters a sample drying pipeline 4; a heating circulating pipe 5 is arranged in the sample drying pipeline 4, the tail end of the heating circulating pipe 5 is connected to a heater 6, the humidity in the gas sample is detected through a humidity sensor, the heater 6 is controlled through a control system to enable the heating circulating pipe 5 to generate heat, and the sample is heated and dried; the other end of the sample drying pipeline 4 is connected to a constant-temperature buffer cavity 7, a constant-temperature heat exchange pipe 8 is arranged on the outer side of the constant-temperature buffer cavity 7, and heat exchange oil 9 is filled in the constant-temperature heat exchange pipe 8; the outer side of the constant-temperature heat exchange tube 8 is provided with a heat preservation layer 10, the tail end of the constant-temperature heat exchange tube 8 is connected to a heat exchanger 11, a dried sample enters a constant-temperature buffer cavity 7, the temperature of sample gas is adjusted to the optimal state temperature through the heat exchange tube 8, meanwhile, the constant-temperature buffer cavity 7 is of a conical structure with a narrow inlet and a wide outlet, the sample slowly diffuses to the rear end of the constant-temperature buffer cavity 7 after entering from an inlet with a small diameter, the gas flow rate is adjusted, and the gas can slowly and uniformly enter a multi-channel flow rate valve 12; the tail end of the constant temperature buffer cavity 7 is connected to a multi-channel flow rate valve 12, an electromagnetic control switch 13 is arranged in the multi-channel flow rate valve 12, the tail end of the multi-channel flow rate valve 12 is connected to a sample introduction pipeline 14, the electromagnetic control switch 13 is used for controlling the outlet flow of the multi-channel flow rate valve, and a gas sample is slowly introduced into the chromatographic analyzer through the multi-channel flow rate valve 12.
It is worth noting that: the whole device is controlled by the master control button, and the equipment matched with the control button is common equipment, so that the device belongs to the existing well-known technology, and the electrical connection relation and the specific circuit structure of the device are not repeated.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a chromatographic analysis instrument advances a kind preprocessing device which characterized in that: comprises a filter (1), a sample drying pipeline (4), a constant temperature buffer cavity (7) and a multi-channel flow rate valve (12); a sample inlet is formed in the filter (1), a sample input pipeline (2) is connected to the sample inlet, an output port (3) is formed in the tail end of the filter (1), and the output port (3) is connected to a sample drying pipeline (4); a heating circulating pipe (5) is arranged in the sample drying pipeline (4), and the tail end of the heating circulating pipe (5) is connected to a heater (6); the other end of the sample drying pipeline (4) is connected to a constant-temperature buffer cavity (7), a constant-temperature heat exchange pipe (8) is arranged on the outer side of the constant-temperature buffer cavity (7), and heat exchange oil (9) is filled in the constant-temperature heat exchange pipe (8); the heat-insulating layer (10) is arranged on the outer side of the constant-temperature heat exchange tube (8), and the tail end of the constant-temperature heat exchange tube (8) is connected to the heat exchanger (11); the constant temperature buffer chamber (7) end is connected to multichannel velocity of flow valve (12), is provided with electromagnetic control switch (13) in multichannel velocity of flow valve (12), and multichannel velocity of flow valve (12) end is connected to sampling pipeline (14).
2. The sample introduction pretreatment device of the chromatographic analysis instrument according to claim 1, characterized in that: the filter (1) adopts a gas filter, and a multi-element filter element and a back washing mechanism are arranged in the filter (1).
3. The sample introduction pretreatment device of the chromatographic analysis instrument according to claim 1, characterized in that: the heating circulating pipe (5) is S-shaped and horizontally distributed in the sample drying pipeline, a humidity sensor is arranged in the sample drying pipeline (4), the humidity sensor is connected to a control system, and the control system is connected to the heater (6).
4. The sample introduction pretreatment device of the chromatographic analysis instrument according to claim 1, characterized in that: the constant-temperature buffer cavity (7) is of a conical structure with a narrow inlet and a wide outlet, a temperature sensor is arranged in the constant-temperature buffer cavity (7), the temperature sensor is connected to a control system, and the control system is connected to the heat exchanger (11).
5. The sample introduction pretreatment device of the chromatographic analysis instrument according to claim 1, characterized in that: multichannel velocity of flow valve (12) are including mainstream logical pipeline and multichannel derivation pipeline, and mainstream logical pipeline one end is connected to constant temperature buffer chamber, and the pipeline is derived to the mainstream logical pipeline other end is provided with the multichannel, and solenoid electric switch (13) set up in the pipeline is derived to the multichannel, and solenoid electric switch (13) are connected to control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922229335.1U CN211927806U (en) | 2019-12-10 | 2019-12-10 | Sample introduction pretreatment device of chromatographic analysis instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922229335.1U CN211927806U (en) | 2019-12-10 | 2019-12-10 | Sample introduction pretreatment device of chromatographic analysis instrument |
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| Publication Number | Publication Date |
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| CN211927806U true CN211927806U (en) | 2020-11-13 |
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| CN201922229335.1U Active CN211927806U (en) | 2019-12-10 | 2019-12-10 | Sample introduction pretreatment device of chromatographic analysis instrument |
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| CN (1) | CN211927806U (en) |
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