TWM560586U - Gas sampling device - Google Patents

Abstract

Gas sampling device can provide a negative pressure with pump. A sample fluid is imported into a sample inlet tubing, flowed through a analysis tubing and exported from a sample outlet tubing. Filters arranged in the inlet tubing or the outlet tubing is used for filtering impurities contained in a sample fluid. Thereby, the present invention can prevent the impurities contained in the sample fluid from polluting the related tubing or components in the fluid sampling device during the measurement process.

Description

Fluid sampling device

The present invention relates to the field of detection technology of volatile organic substances, in particular, to a fluid sampling device for a sample fluid.

With the advancement of the human industry, air pollution is gradually increasing. Therefore, all major industrial countries in the world have regulatory standards for the emission of volatile organic compounds (VOCs), and there is a growing trend that industrial gas environments are often required to be retrofitted. A measurement system that measures the composition of volatile organic compounds in a gas.

The above volatile organic substances generally refer to organic compounds which have a boiling point of less than 250 ° C under standard conditions (0 ° C and 760 mmHg), and even some people directly define volatile organic substances as all organically present in the atmosphere in a gaseous state. A compound comprising an organic compound such as total hydrocarbon (THC) or non-methane total hydrocarbon (NMHC).

The fluid sampling device is a device for detecting volatile organic substances in industrial waste gas. Due to the structural design, such as the material and the material is suitable for high temperature environment, not all areas of the volatile organic matter analysis device are suitable for setting. The temperature device (for example, an oven), therefore, the internal space of the volatile organic substance analyzer can be divided into a high temperature region and a low temperature region according to the temperature, wherein the temperature of the high temperature region is generally higher than the condensation temperature of the liquid and the particulate matter. (high temperature area Is close to the heating device), and the temperature of the low temperature region is equivalent to the normal room temperature, that is, lower than or equal to the condensation temperature of the liquid and the granular material, generally, the inlet pipe at the front end of the volatile organic matter analysis device or The outlet line of the rear end is usually in the so-called low temperature region described above.

Since industrial waste gas produced in industrial manufacturing is usually a high-temperature and high-humidity gas, and often contains a large amount of impurities such as liquids and particulate matter, such industrial waste gas passes through a low temperature region inside the volatile organic matter analyzer. At the time, impurities such as liquid or particulate matter carried in the industrial exhaust gas may condense on the relevant pipelines and components in the low temperature region due to the low temperature in the low temperature region, thereby causing contamination of the relevant pipeline and components. Abnormalities such as damage.

In view of this, how to provide a fluid sampling device to overcome the above-mentioned various drawbacks of the prior art, that is, the technical problem to be solved in this case.

In view of the above problems of the prior art, the main object of the present invention is to provide a fluid sampling device capable of filtering out impurities such as liquids and particulate matter in a sample fluid to avoid related pipelines and components in the volatile organic substance analysis device. Being polluted.

Another object of the present invention is to provide a fluid sampling device for introducing a sample fluid by a negative pressure method, which can prevent the pump body from being contaminated by the sample fluid and can prolong the service life of the pump body.

It is still another object of the present invention to provide a fluid sampling device for detecting the presence of a leak abnormality in a related line and component in a volatile organic substance analyzing device.

To achieve the above and other objects, the present invention provides a fluid sampling device for sampling a sample fluid, the fluid sampling device including a detection line for detecting a concentration or composition of the sample fluid; communicating the detection tube a path to introduce the sample fluid into the test tube Introducing a pipeline; connecting the detection pipeline to derive the sample fluid from the sample outlet pipeline of the detection pipeline; and filtering the filter disposed in the sample introduction pipeline or the sample outlet pipeline The sample introduction pipeline or the liquid in the sample fluid of the sample outlet pipeline, and the gas in the sample fluid of the pipeline is introduced into the pipeline or the sample body; the negative of the sample outlet pipeline is connected a pressure pump for supplying a sample fluid to the sample outlet line via the detection line and receiving the gas passing through the filter; the liquid communicating with the filter An ejector receiving the liquid filtered by the filter; and a control module for controlling the negative pressure pump and the liquid ejector to perform an operation.

Preferably, the fluid sampling device is a volatile organic matter analysis device, and the detection line detects the concentration or composition of volatile organic substances in the sample fluid.

Preferably, the filter also filters out particulate matter in the sample introduction line or the sample fluid of the sample delivery line.

Preferably, the method further comprises at least one flow measuring unit, wherein the flow measuring unit is disposed on at least one of the sample introduction line and the sample lead-out line to introduce the sample into the pipeline or The sample is exported to the negative pressure airflow in the pipeline for measurement.

Preferably, the fluid sampling device has at least one valve body, and the valve system is disposed on at least one of the sample introduction conduit, the detection conduit and the sample delivery conduit, and the fluid sampling device The utility model further comprises a pipeline checking module, wherein the pipeline checking module is configured to block the valve body to at least one of the sample introduction pipeline, the detection pipeline and the sample outlet pipeline, and the valve body When the flow measuring unit measures the negative pressure airflow, it is determined that the sample introduction pipeline, the detection pipeline or the sample outlet pipeline is abnormal.

Preferably, the utility model further comprises a flow measuring unit, wherein the negative pressure pump has an inhaling end and an exhaust end, and the inspirating end is connected to the sample lead-out line to provide the negative pressure to the sample lead-out line airflow, The exhaust end is connected to the flow measuring unit to provide a positive pressure air flow to the flow measuring unit, and the flow measuring unit measures the flow rate of the positive pressure air flow.

Preferably, the fluid sampling device has at least one valve body, and the valve system is disposed on at least one of the sample introduction pipeline, the detection pipeline, the negative pressure pump, and the sample outlet conduit. And the fluid sampling device further comprises a pipeline checking module, wherein the pipeline checking module is configured to close the sample introduction pipeline, the detecting pipeline, the negative pressure pump and the sample body exporting pipeline At least one of the following, when the valve body is in a closed state, and the flow measuring unit measures a positive pressure airflow, determining the sample introduction pipeline, the detection pipeline, the negative pressure pump or the sample body There is an abnormality in the export pipeline.

Preferably, the flow valve is disposed in the sample introduction pipeline or the sample outlet pipeline to control the negative pressure airflow in the sample introduction pipeline or the sample outlet pipeline. flow.

Preferably, the utility model further comprises a flow valve, wherein the negative pressure pump has an air suction end and an exhaust end, wherein the air suction end is connected to the sample body lead-out pipe to provide a negative pressure air flow to the sample body lead pipe, The exhaust end is connected to the flow valve to provide a positive pressure flow to the flow valve, and the flow valve controls the flow of the negative pressure air flow in the sample discharge line by controlling the flow of the positive pressure air flow.

Preferably, the method further includes a liquid amount sensor, and the filter has a liquid storage tank for storing the liquid filtered by the filter, and the liquid quantity sensor senses the liquid storage tank. The control module receives the sensing result of the liquid amount sensor, and when the liquid amount of the liquid storage tank reaches the warning value, the control module controls the liquid discharge device to perform the operation.

Preferably, the filter has a liquid storage tank for storing the liquid filtered by the filter, and the control module controls the liquid discharge device to perform the operation for a predetermined time.

In summary, the fluid sampling device of the present invention is provided with a filter through a sample introduction pipe or a sample discharge pipe to filter out impurities such as liquid and particulate matter carried in the sample fluid. When the sample-free fluid flows through the low temperature region inside the volatile organic matter analyzer, impurities such as liquid or particulate matter carried in the sample fluid condense on the relevant pipelines and components, thereby avoiding contamination of the relevant pipelines and components. Abnormality in component damage, etc. In addition, the fluid sampling device of the present invention introduces the negative pressure pump to introduce the sample fluid in a negative pressure manner, thereby preventing the negative pressure pump from being contaminated by the sample fluid to prolong its service life. Furthermore, the present invention provides a maintenance effect by setting a detection mechanism to detect whether there is a leak abnormality in a related pipeline or component inside the volatile organic substance analysis device.

1‧‧‧Fluid sampling device

11‧‧‧Test pipeline

12‧‧‧sample introduction pipeline

13‧‧‧sample export line

14‧‧‧Filter

141‧‧‧ liquid storage tank

15‧‧‧Negative pressure pump

151‧‧‧ Inhalation end

152‧‧‧Exhaust end

16‧‧‧Liquid ejector

161‧‧‧Connected pipeline

17‧‧‧Control Module

18, 18a, 18b, 18c, 18d‧‧‧ flow measurement unit

19‧‧‧Pipe check module

20‧‧‧Flow valve

21, 21a, 21b, 21c, 21d ‧ ‧ body

22‧‧‧Liquid sensor

1A, 1B, 2A, 2B, and 3 to 5 are block diagrams of various embodiments of a novel fluid sampling device; FIG. 6A is a simplified embodiment of a first embodiment of the fluid sampling device of the present invention; Figure 6B is a simplified schematic view of the arrangement of the second embodiment of the fluid sampling device of the present invention; and Figure 6C is a schematic view of an embodiment of the arrangement of the fluid sampling device of the present invention.

The following content will be described in conjunction with the drawings, and the technical contents of the present invention will be described by a specific embodiment. Those skilled in the art can easily understand other advantages and effects of the present invention by the contents disclosed in the present specification. The present invention may also be embodied or applied by other different embodiments. The details in this manual can also be based on different viewpoints and applications, without departing from the spirit of the present invention. Modifications and changes. In particular, the proportional relationship and relative positions of the various elements in the drawings are for exemplary purposes only and are not representative of actual implementation of the present invention.

The specific structure and function of the fluid sampling device of the present invention will be described in detail below with reference to the drawings of the present invention, wherein FIG. 1A, FIG. 1B, FIG. 2A, FIG. 2B, FIG. A block diagram of various embodiments; Fig. 6 is a schematic view showing an embodiment of an arrangement of internal piping and components of the fluid sampling device of the present invention.

The fluid sampling device 1 of the present invention is used for sampling a sample fluid to be detected. In the embodiment of the present invention, the sample flow system is, for example, an industrial exhaust gas, and the fluid sampling device 1 is a volatile organic substance analyzing device for detecting The concentration or composition of volatile organic substances in industrial exhaust gases. Referring to FIG. 1A and FIG. 1B , the fluid sampling device 1 of the present invention mainly comprises a detection pipeline 11 , a sample introduction pipeline 12 , a sample outlet conduit 13 , a filter 14 , a negative pressure pump 15 , and a liquid discharge device 16 . And the control module 17.

The detection line 11 is used to detect the concentration or composition in the sample fluid. In the present embodiment, the detecting line 11 is disposed between the sample introduction line 12 and the sample outlet line 13 (as shown in FIG. 6A) for detecting the concentration of volatile organic substances in the sample fluid or Component. Typically, the test line 11 is disposed around a heating element (e.g., an oven), i.e., in a high temperature region of the fluid sampling device 1. In one embodiment, associated detection elements for detecting the concentration or composition of volatile organic materials, such as sample reservoirs, sample separators, sample detectors, and injection valves, may be coupled to the detection line 11. Furthermore, a schematic diagram of the arrangement of the detection line 11 and the associated detecting element can be referred to the portion shown in the dashed box of FIG. 6C.

The sample introduction line 12 is connected to the detection line 11 for introducing the sample fluid to the detection line 11. Referring to FIG. 6A and FIG. 6C , in the embodiment, the sample introduction line 12 may include a pipeline from the inlet to the detection line 11 .

The sample lead-out line 13 is connected to the detection line 11 to conduct the sample fluid out of the detection line 11. Referring to FIG. 6A and FIG. 6C, in the present embodiment, the sample lead-out line 13 is also in the low temperature region of the fluid sampling device 1, and includes a line between the self-test line 11 and the negative pressure pump 15.

The filter 14 can be disposed on the sample introduction line 12 (as shown in FIG. 1B and FIG. 6A ), or can be disposed on the sample outlet line 13 (as shown in FIG. 1A or FIG. 6A and FIG. 6C ) for The liquid carried in the sample fluid of the sample introduction line 12 or the sample delivery line 13 is filtered out, and the gas in the sample fluid is introduced into the line 12 or the sample outlet line 13 through the sample body. Preferably, the filter 14 can also be used to filter particulate matter in the sample fluid of the sample introduction line 12 or the sample delivery line 13.

Specifically, the filter 14 can be used to filter impurities such as liquid or particulate matter carried in the sample fluid, as shown in FIG. 6A or FIG. 6C, in which the gas in the sample fluid passes through the filter 14, and the separated liquid Then, it is stored in the lower space of the filter 14 by gravity. As described in the foregoing background art, since the sample introduction line 12 or the sample outlet line 13 is usually in a low temperature region in the volatile organic substance analysis device, when the sample fluid is flowing through the sample introduction line 12 or the sample When the body is led out of the pipe 13, impurities such as liquid or particulate matter carried in the sample fluid are easily condensed on the pipe wall of the sample introduction pipe 12 or the sample discharge pipe 13, and the damage is set in the sample introduction pipe. 12 or the relevant element on the sample lead line 13. Therefore, the present invention provides a filter 14 by the sample introduction line 12 or the sample outlet line 13 to effectively prevent the sample fluid from flowing through the sample introduction line 12 or the sample outlet line 13, the sample fluid. Contaminants such as liquid or particulate matter carried are condensed on the pipe walls of the above-mentioned pipes 12, 13, causing problems of damage of related components.

The negative pressure pump 15 is connected to the sample discharge line 13 for supplying a negative pressure gas flow so that the sample fluid flows from the sample introduction line 12 to the sample outlet line 13 via the detection line 11 and is received through the filtration. The gas in the sample fluid separated by the device 14. Specifically, the negative pressure pump 15 is disposed in the sample guide The rear end of the outlet pipe 13, that is, the tail portion of the fluid sampling device 1, is used to supply a negative pressure air flow to the sample introduction line 12, the detection line 11 and the sample outlet line 13, and the sample fluid is pressurized by the negative pressure pump 15. The supplied negative pressure gas stream is drawn into the sample introduction line 12, and enters the detection line 11 for detection and analysis of volatile organic substances, and the detected sample fluid continues to flow through the detection line 11 to the sample body. Line 13. Further, the gas in the sample fluid can be discharged to the outer space of the fluid sampling device 1 through the filter 14 disposed in the sample introduction line 12 or the sample lead-out line 13, and then passed through the negative pressure pump 15. Thereby, since the present invention introduces the sample fluid by the negative pressure method, the negative pressure pump 15 can be disposed at the rear end of the sample discharge line 13, that is, the rear end of the filter 14, so that the negative pressure pump 15 is less susceptible to the sample. Contamination of impurities such as liquids or particulate matter in the fluid, causing damage.

The liquid ejector 16 is in communication with the filter 14 for receiving the liquid filtered by the filter 14. In the present embodiment, the liquid ejector 16 is a peristaltic pump and has a communication line 161 (shown in FIG. 5, FIG. 6A or FIG. 6C) that communicates with a low point inside the reservoir 141 for filtering. The liquid filtered from the sample fluid 14 is discharged to the outer space of the fluid sampling device 1 via the first drain port or the second drain port (as shown in FIG. 6A). Since the structural design of the peristaltic pump has better airtightness to prevent leakage, the present invention can avoid the backflow of the filtered liquid and ensure the normal operation of the internal components and pipelines of the fluid sampling device 1.

The control module 17 is used to control the operation of the negative pressure pump 15 and the liquid ejector 16. In this embodiment, the control module 17 is, for example, a control chip for controlling the operation of the negative pressure pump 15 to be a sample introduction tube. The road 12, the sample discharge line 13 and the detection line 11 provide a negative pressure air flow and are controlled for the negative pressure pump 15, for example, for controlling the start and stop of the negative pressure pump 15. In addition, the control module 17 is also used to control the liquid ejector 16 to discharge the liquid filtered by the filter 14 in time.

Referring to FIG. 2A and FIG. 2B , in another embodiment, the fluid sampling device 1 further includes at least one flow measuring unit 18 , wherein the flow measuring unit 18 can be disposed on the sample introduction line 12 ( eg 2A), or disposed on one of the sample body lead-out lines 13 (as shown in FIG. 2B), and may be separately disposed on the sample body introduction line 12 and the sample body lead-out line 13. A flow measuring unit 18 (shown in FIG. 6A or FIG. 6C) measures the negative pressure airflow in the sample introduction line 12 or the sample outlet line 13, thereby providing the control module 17 for negative The negative pressure air flow provided by the pressure pump 15 is controlled. The flow measurement unit 18 can be, for example, a float flow meter.

Referring to FIG. 2A and FIG. 2B , in another embodiment, the present invention can also detect whether there is a leak abnormality in the internal pipeline of the fluid sampling device 1 by the design of the flow measuring unit 18 . Specifically, the fluid sampling device 1 further has at least one valve body 21, and the valve body 21 is selectively disposed on at least one of the sample introduction conduit 12, the sample delivery conduit 13 and the detection conduit 11, A valve body 21 may be respectively disposed on the sample introduction line 12, the sample outlet line 13 and the detection line 11 (wherein, FIG. 2A and FIG. 2B only show that the valve body 21 is disposed in the sample introduction line). Implementation on 12). The fluid sampling device 1 further has a pipeline checking module 19, and the pipeline checking module 19 can be used to close the valve body 21 to at least one of the sample introduction conduit 12, the detection conduit 11 and the sample delivery conduit 13. When the valve body 21 is in the closed state, and the flow rate measuring unit 18 also measures the presence of the negative pressure airflow in the pipeline, it is determined that the sample introduction conduit 12, the detection conduit 11 or the sample outlet conduit 13 At least one of them has a leaking anomaly.

Referring to FIG. 6A , in an embodiment of the present application, the valve body 21 a is disposed at the inlet of the front end of the sample introduction line 12 and is provided with a valve body 21 a , and is disposed on the sample introduction line 12 . The flow rate measuring unit 18a is provided with a flow rate measuring unit 18b on the detecting line 11, and a flow rate measuring unit 18c is provided in the sample body leading line 13. When the pipeline check is performed, the pipeline checking module 19 closes the valve body 21a. Therefore, even if the negative pressure pump 15 is still operating, the flow measuring unit 18a, 18b or 18c should not measure. The negative pressure air flow is generated, that is, if the flow rate measuring unit 18a does not measure the negative pressure air flow in the closed state of the valve body 21a, it can be judged that the sample introduction line 12 has no leakage and is normal; When the flow measurement unit 18b does not measure the negative pressure airflow, it can be determined that the detection pipeline 11 and the sample introduction pipeline 12 are not leaking and is normal; when the flow measurement unit 18c does not measure the negative pressure airflow. It can be judged that the detection line 11, the sample introduction line 12, and the sample outlet line 13 are not leaking and are normal.

In other words, when neither the flow rate measuring unit 18a nor the flow rate measuring unit 18b measures the negative pressure air flow, and the flow rate measuring unit 18c measures the negative pressure air flow, it can be determined that the sample body lead-out line 13 has a leak abnormality. When the flow measuring units 18a and 18b measure the negative pressure airflow uniformly, the magnitudes of the negative pressure airflow values measured by the flow measuring units 18a and 18b are determined, and are measured by the flow measuring units 18a and 18b. When the values of the negative pressure airflows are substantially equal, there is a leak in the sample introduction line 12, and there is no abnormality in the detection pipeline 11, and the negative pressure airflow measured by the flow measurement unit 18b is larger than that of the flow measurement unit 18a. When the measured negative pressure air flow is performed, it represents that the sample introduction line 12 and the detection line 11 simultaneously have a leakage abnormality; and when the flow measurement units 18c and 18b measure the negative pressure air flow values substantially equal, then The representative detection pipeline 11 has a leak, and the sample outlet conduit 13 has no abnormality. When the negative pressure airflow measured by the flow measurement unit 18c is greater than the negative pressure airflow measured by the flow measurement unit 18b, it represents detection. The pipeline 11 and the sample lead-out detection pipeline 13 are simultaneously stored Leak exception. It should be noted that the arrangement of the valve body 21 and the flow rate measuring unit 18 is not limited to that shown in FIG. 6A, and other arrangements may be used. For example, in other embodiments, the valve body 21a is disposed at the inlet of the front end of the sample introduction line 12, and the valve body 21 may be disposed between the sample introduction line 12 and the detection line 11, respectively. A valve body is disposed between the detection line 11 and the sample outlet line 13, and the flow rate measuring unit 18c is provided only for the sample body lead line 13 to achieve the same effect of the line check.

Referring to FIG. 3, in another embodiment of the present invention, the negative pressure pump 15 further has an inhalation end 151 and an exhaust end 152, wherein the inhalation end 151 is connected to the sample lead-out line 13 to be sampled. The body lead-out line 13 provides a negative pressure air flow, and the exhaust end 152 is connected to the flow rate measuring unit 18 to provide a positive pressure air flow to the flow rate measuring unit 18, and the flow rate measuring unit 18 is used to provide positive pressure to the negative pressure pump 15. The flow rate of the pressurized gas stream is measured. Preferably, the fluid sampling device 1 further has at least one valve body 21 which is selectively disposed in the sample introduction line 12, the detection line 11, the negative pressure pump 15, and the sample outlet line 13 as needed. At least one of them (wherein FIG. 3 only shows an embodiment in which the valve body 21 is disposed on the sample introduction line 12), and the fluid sampling device 1 further includes a pipeline checking module 19, and a pipeline checking module. 19 is used for sealing the valve body 21 to at least one of the sample introduction line 12, the detection line 11, the negative pressure pump 15, and the sample outlet line 13, when the valve body 21 is in a closed state, and the flow rate is When the measuring unit 18 measures the positive pressure airflow, it is judged that there is a leakage abnormality in the sample introduction line 12, the detection line 11, the negative pressure pump 15, or the sample discharge line 13.

Referring to FIG. 6B, in the present embodiment, the suction end 151 means that the negative pressure pump 15 is used to communicate one end of the sample lead-out line 13, and the exhaust end 152 means that the negative pressure pump 15 is used to connect the second row. One end of the gas port. Wherein, the negative pressure pump 15 supplies a negative pressure air flow to the sample discharge line 13 at the front end thereof, and provides a line for the rear end (ie, the line between the second exhaust port and the negative pressure pump 15). The positive pressure air flow, the flow measuring unit 18d is disposed on the pipeline between the second exhaust port and the negative pressure pump 15 for measuring the flow rate of the positive pressure airflow provided by the negative pressure pump 15 for the section of the pipeline Measurement. Further, a valve body 21a is provided at the inlet of the front end of the sample introduction line 12; a valve body 21b is provided at the junction of the sample introduction line 12 and the detection line 11; and the detection line 11 and the sample are provided. A valve body 21c is disposed at a joint of the outlet line 13; a valve body 21d is disposed between the sample body lead line 13 and the negative pressure pump 15; in a specific operation, first, the line check module 19 causes the valve body 21d Closed, the passage between the sample body lead-out line 13 and the negative pressure pump 15 is cut off, and in this state, the flow rate measuring unit 18d can pass It is measured whether there is a positive pressure air flow, and it is judged whether or not the negative pressure pump 15 has a leak abnormality. Next, the pipeline checking module 19 closes the valve body 21c (the valve body 21d is in an open state), and the passage between the sample body discharge line 13 and the detecting line 11 is cut off, and in this state, the flow rate When the measuring unit 18d measures the positive pressure airflow and has previously determined that the negative pressure pump 15 has no abnormality in leakage, it can be determined that there is a leakage abnormality in the sample discharge line 13. By the way, the valve checking module 19 closes the valve body 21b and the valve body 21a, respectively, to gradually determine whether there is a leak abnormality in the detecting line 11 and the sample introduction line 12, and details are not described herein. It should be noted that the arrangement of the valve body 21 and the flow rate measuring unit 18 is not limited to the one shown in FIG. 6B, and other arrangement modes may also be used.

In other embodiments of the present application, the fluid sampling device 1 further includes a flow valve 20, wherein the flow valve 20 is disposed on the sample introduction line 12 or on the sample outlet line 13 to control the sample introduction tube. The flow rate of the negative pressure gas stream in the line 12 or the sample outlet line 13. Specifically, in practical applications, the flow valve 20 is used to regulate the flow rate of the negative pressure gas stream passing through the sample introduction line 12 or the sample outlet line 13. The flow valve 20 may be disposed in the sample introduction line 12 or may be disposed on the sample discharge line 13 or may be replaced by the flow rate measurement unit 18 instead of the flow rate measurement unit 18.

Referring to FIG. 4, in another embodiment of the present invention, the negative pressure pump 15 has an inhalation end 151 and an exhaust end 152, wherein the inhalation end 151 is connected to the sample lead-out line 13 to be sampled. The body lead-out line 13 provides a negative pressure air flow, the exhaust end 152 is connected to the flow valve 20 to provide a positive pressure flow to the flow valve 20, and the flow valve 20 controls the flow of the positive pressure air flow to control the sample discharge line. The flow of the negative pressure airflow in 13.

Specifically, referring to FIG. 6C, the suction end 151 means that the negative pressure pump 15 is used to communicate one end of the sample discharge line 13, and the exhaust end 152 is used to connect the negative pressure pump 15 to the second exhaust port. One end. Wherein, the negative pressure pump 15 provides a negative pressure air flow to the sample discharge line 13 at the front end thereof, and The pipeline at the rear end (ie, the pipeline between the second exhaust port and the negative pressure pump 15) provides a positive pressure air flow, and the flow valve 20 is disposed on the pipeline between the second exhaust port and the negative pressure pump 15 ( Not shown in the figure), in general, the vacuum pump 15 provides a negative pressure air flow to the sample discharge line 13 and the negative pressure pump 15 is provided for the pipeline between the second exhaust port and the negative pressure pump 15. The positive pressure airflow is equivalent. Therefore, the flow rate of the positive pressure airflow in the pipeline between the second exhaust port and the negative pressure pump 15 can be controlled by the flow valve 20 to indirectly control the negative pressure pump 15 for the sample discharge tube. The flow of the negative pressure air flow provided by the road 13.

Referring to FIG. 5, in the present embodiment, the fluid sampling device 1 further includes a liquid amount sensor 22, and the filter 14 has a liquid storage tank 141 for storing the filter 14 from the sample fluid. The liquid amount sensor 22 is used to sense the amount of liquid in the liquid storage tank 141, and the control module 17 is further configured to receive the sensing result of the liquid amount of the liquid amount sensor 22 when the liquid amount sensor 22 When the sensed liquid amount of the liquid storage tank 141 reaches the warning value, the control module 17 controls the liquid discharger 16 to perform the operation to discharge the liquid stored in the liquid storage tank 141.

In other embodiments, the liquid amount sensor 22 may not be provided, and the control module 17 may be timed to control the liquid discharger 16 to perform a work to discharge the liquid stored in the liquid storage tank 141 according to a predetermined time.

In summary, the fluid sampling device of the present invention can be provided with a negative pressure pump at the rear end of the fluid sampling device, and the negative pressure pump is used to introduce the sample fluid through the negative pressure mode, and the sample fluid is passed through the sample introduction pipeline or sample. The body extracts the filter of the pipeline to filter out impurities such as liquid and particulate matter carried in the sample fluid, thereby preventing impurities such as liquid and particulate matter carried in the sample fluid from condensing in the pipeline flowing through and The components such as the negative pressure pump cause damage to the relevant components, thereby protecting the relevant pipelines and components in the low temperature region from impurities such as liquid or particulate matter.

In addition, the present invention is further provided with a flow measuring unit, which measures the presence or absence of airflow in the relevant pipeline by closing the inlet, and determines the sample introduction pipeline, the detection pipeline, the negative pressure pump or the sample outlet pipeline. Is there a leak anomaly to ensure proper operation of the associated piping and components in the fluid sampling device.

The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify and change the above embodiments without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be as set forth in the scope of the patent application of the present invention.

Claims (11)

A fluid sampling device for sampling a sample fluid, the fluid sampling device comprising: a detection pipeline for detecting a concentration or a component of the sample fluid; and a sample introduction conduit connected to the detection pipeline to The sample fluid is introduced into the detection pipeline; the sample outlet conduit is connected to the detection pipeline to export the sample fluid to the detection pipeline; the filter is disposed in the sample introduction pipeline or the sample is exported The pipeline filters out the liquid in the sample fluid of the sample introduction pipeline or the sample outlet pipeline, and allows the gas in the sample fluid to pass through the sample introduction pipeline or the sample outlet pipeline; The pump is connected to the sample body exporting line, and provides a negative pressure air flow to make the sample fluid flow from the sample body introduction pipe to the sample body exporting pipe through the detecting pipe, and receives the filter passing through a liquid ejector that communicates with the filter and receives liquid filtered by the filter; and a control module that controls the vacuum pump to perform work with the liquid ejector. The fluid sampling device according to claim 1, wherein the fluid sampling device is a volatile organic substance analyzing device, and the detecting pipeline detects a concentration or a component of a volatile organic substance in the sample fluid. . The fluid sampling device of claim 1, wherein the filter further filters out particulate matter in the sample introduction line or the sample fluid of the sample delivery line. The fluid sampling device of claim 1, further comprising at least one flow measuring unit, wherein the flow measuring unit is disposed on at least one of the sample introduction line and the sample lead-out line To measure the negative pressure airflow in the sample introduction pipeline or the sample outlet pipeline. The fluid sampling device of claim 4, wherein the fluid sampling device has at least one valve body, the valve system is disposed on the sample introduction pipeline, the detection pipeline, and the sample outlet conduit And at least one of the fluid sampling devices further includes a pipeline checking module, wherein the pipeline checking module is configured to close the sample introduction pipeline, the detection pipeline, and the sample body At least one of the pipelines, when the valve body is in a closed state, and the flow measuring unit measures a negative pressure airflow, determining the sample introduction pipeline, the detection pipeline or the sample outlet pipeline There is an exception. The fluid sampling device according to claim 1, further comprising a flow measuring unit, wherein the negative pressure pump has an inhaling end and an exhaust end, wherein the inhaling end is connected to the sample lead-out line to The sample outlet line provides the negative pressure airflow, and the exhaust end is connected to the flow measurement unit to provide a positive pressure airflow to the flow measurement unit, and the flow measurement unit performs the flow of the positive pressure airflow Measure. The fluid sampling device of claim 6, wherein the fluid sampling device has at least one valve body, the valve system is disposed on the sample introduction line, the detection line, the negative pressure pump, and the At least one of the sample-extracting pipelines, and the fluid sampling device further comprises a pipeline checking module, wherein the pipeline checking module is configured to close the sample body introducing pipeline and the detecting pipeline At least one of the negative pressure pump and the sample lead-out line, when the valve body is in a closed state, and the flow measuring unit measures a positive pressure airflow, determining the sample introduction pipeline, the There is an abnormality in the test line, the negative pressure pump, or the sample discharge line. The fluid sampling device according to claim 1, further comprising a flow valve disposed in the sample introduction line or the sample outlet line to control the sample introduction line or the sample The volume of the negative pressure airflow in the pipeline is derived. The fluid sampling device according to claim 1, further comprising a flow valve, wherein the negative pressure pump has an inhalation end and an exhaust end, and the inhalation end is connected to the sample discharge line to the sample The body lead-out line provides a negative pressure air flow, and the exhaust end is connected to the flow valve to provide a positive pressure air flow to the flow valve, and the flow valve controls the sample discharge tube by controlling the flow of the positive pressure air flow The flow of negative pressure airflow in the road. The fluid sampling device according to claim 1, further comprising a liquid amount sensor, wherein the filter has a liquid storage tank, and the liquid storage tank stores the liquid filtered by the filter, and the liquid quantity sense The measuring device senses the liquid volume of the liquid storage tank, and the control module receives the sensing result of the liquid amount sensor, and when the liquid amount of the liquid storage tank reaches the warning value, the control module controls the liquid The ejector performs the job. The fluid sampling device of claim 1, wherein the filter has a liquid storage tank for storing the liquid filtered by the filter, and the control module controls the predetermined time. The liquid ejector performs the job.