Multi-channel acquisition and on-line monitoring system

Abstract

The utility model discloses a multichannel collection and online monitoring system, the system comprises a collection device, a sampling pipeline and a monitor, the sampling pipeline is arranged in a target area to collect gas in the target area, and the collection device is communicated between the sampling pipeline and the monitor; the sampling pipeline comprises a plurality of pipelines which are respectively arranged in each target area; all the pipelines are communicated with the collecting device. The valve body is rotated through the stepping motor, connection and disconnection of different pipelines are controlled, it is guaranteed that only one sample can enter the monitor to be detected, the samples between the different pipelines cannot be mixed in the multi-channel collecting device, and independence and accuracy of the samples are guaranteed.

Description

Technical Field

[0001] This application relates to the field of testing and monitoring systems, and in particular to a system for multi-channel data acquisition and online monitoring. Background Technology

[0002] Existing offline laboratory methods involve collecting samples from various locations and then analyzing them in the laboratory. However, many factors can affect the actual concentration of the samples during the collection, transportation, and pretreatment processes. These factors include, but are not limited to, the collection method, preservation method, transportation time, and pretreatment method. Online methods, on the other hand, usually monitor a single location or a few locations. This is limited by the detection speed and pipeline switching speed of online methods, and there is a lack of suitable pipeline switching devices. Utility Model Content

[0003] To address the problems existing in the prior art, this application provides a system for multi-channel data acquisition and online monitoring.

[0004] This application proposes to design a multi-channel acquisition device, combined with the flow path design of the entire system, to achieve online monitoring of pollutants at multiple points or flow paths using the same analysis and detection system.

[0005] A parallel is defined as the trajectory formed by a point on the surface of the valve body or housing as the valve body or housing rotates. A meridian is defined as the semicircular arc connecting the two ends of the axis of rotation of the valve body or housing.

[0006] The plane perpendicular to the axis of rotation of the valve body or housing and passing through the center of the sphere is defined as the equatorial plane. Latitude is defined as the angle between the normal to a point on the valve body or housing and the equatorial plane. The location of the valve body or housing in the main pipeline or main channel is defined as North Latitude, and vice versa.

[0007] The specific technical solution of this application is as follows:

[0008] 1. A multi-channel acquisition and online monitoring system, wherein the system includes an acquisition device, a sampling pipeline and a monitoring instrument, the sampling pipeline is installed in a target area to acquire gas in the target area, and the acquisition device is connected between the sampling pipeline and the monitoring instrument;

[0009] The sampling pipeline includes multiple pipelines respectively set in each target area; all pipelines are connected to the sampling device.

[0010] 2. The system according to item 1, wherein the acquisition device includes a housing, and a main pipe and a branch pipe are provided on the housing; the main pipe is connected to the monitoring instrument, and the branch pipe is connected to the pipeline.

[0011] 3. The system according to item 2, wherein the acquisition device includes a valve body disposed inside the housing, the valve body being capable of controlling the opening and closing of the branch pipe and the main pipe.

[0012] 4. The system according to item 3, wherein the valve body is rotatably connected to the housing, and the valve body is rotatable inside the housing.

[0013] 5. The system according to item 3 or 4, wherein the valve body is provided with a main channel and a branch channel, the branch channel being connected to the main channel; the main channel is connected to the main pipeline, and the branch channel is capable of being connected to the branch pipeline as the valve body rotates.

[0014] 6. The system according to item 3 or 4, wherein one or more branch channels are provided; and multiple branch channels are evenly provided on the housing;

[0015] Preferably, there are 4 to 12 branch pipes in the latitude direction of the shell, and more preferably 8.

[0016] More preferably, there are 2 to 8 branch pipes arranged in the meridian direction of the shell, and more preferably 4.

[0017] 7. The system according to item 3 or 4, wherein the housing includes an upper housing and a lower housing, the main pipe is disposed on the upper housing, a motor for driving the valve body to rotate is disposed on the lower housing, and a connection hole for connecting the valve body and the motor is provided on the lower housing; a housing sealing ring is disposed between the upper housing and the lower housing;

[0018] Preferably, the electrode is a stepper motor;

[0019] More preferably, the stepper motor rotates at an angle of 10 to 12 degrees each time;

[0020] More preferably, the stepper motor rotates by 11.5° each time.

[0021] 8. The system according to item 3 or 4, wherein the valve body includes an upper valve body and a lower valve body; a main channel is opened on the upper valve body, and a drive hole for connecting a motor is opened on the lower valve body; a valve body sealing ring is provided at the connection between the upper valve body and the lower valve body.

[0022] 9. The system according to item 1, wherein a three-way valve is provided on the pipeline, the three-way valve being located in a target area corresponding to the pipeline.

[0023] 10. The system according to item 1, wherein the acquisition pipeline includes a manifold and a sampling pump, the sampling pump is connected to the manifold, and all pipelines are connected to the manifold; a first flow controller is provided on each pipeline.

[0024] 11. The system according to item 10, wherein the flow rate in the pipeline is 5 to 20 L / min; preferably 10 L / min.

[0025] 12. The system according to item 1, wherein a detection three-way valve is provided between the acquisition device and the monitoring instrument; a detection pump is connected to the detection three-way valve, and a second flow controller is provided between the detection pump and the detection three-way valve.

[0026] 13. The system according to item 12, wherein the flow rate at the three-way valve is detected to be 0.5 to 5 L / min; preferably 1 L / min.

[0027] 14. A method for multi-channel acquisition and online monitoring using the system described in any one of items 1 to 13, comprising the following steps:

[0028] Gas circulation pipelines are placed in multiple target areas respectively;

[0029] The sampling end of the pipeline is located in the target area;

[0030] Each sampling end acquires a sample in its respective target area;

[0031] The control sampling device delivers samples from the desired target area to the monitoring instrument;

[0032] The data acquisition device is located near the monitoring instrument.

[0033] 15. The method according to item 14, wherein the flow rate of the pipeline during sampling is 5 to 20 L / min; preferably 10 L / min.

[0034] 16. The method according to item 14, wherein the flow rate when delivering the sample to the monitor is 0.5 to 5 L / min; preferably 1 L / min.

[0035] 17. The method according to item 14, wherein a three-way valve is provided at the sampling end of the pipeline; all pipelines are connected to a manifold.

[0036] Beneficial effects

[0037] The multi-channel acquisition device of this application controls the opening and closing of different pipelines by rotating the valve body with a stepper motor, ensuring that only one sample from one pipeline can enter the monitor for detection. Moreover, samples from different pipelines will not be mixed in the multi-channel acquisition device, ensuring the independence and accuracy of the samples. The detection pump continuously draws samples at the monitor end, ensuring that the samples in the pipeline between the monitor and the acquisition device can be quickly updated. The detection three-way valve at the front end of the monitor and the detection pump are as short as possible to reduce mutual interference during sample switching.

[0038] The multi-channel data acquisition device in this application is easy to disassemble, and the entire system is easy to perform leak detection, cleaning, and maintenance. The data acquisition device has high versatility and can be adapted to online monitoring equipment with rapid monitoring capabilities. The number of pipelines is highly expandable, and appropriate sizes can be selected according to actual needs. Attached Figure Description

[0039] Figure 1 This is an overall structural diagram of the testing system of this application;

[0040] Figure 2 This is an exploded view of the data acquisition device used in this application;

[0041] Figure 3 This is a cross-sectional view of the data acquisition device of this application;

[0042] Figure 4 This is an exploded view of the valve body structure of this application;

[0043] Figure 5 This is a cross-sectional view of the valve body structure of this application.

[0044] In the diagram, 1. Upper shell; 11. Main pipe; 12. Shell sealing ring; 13. Branch pipe; 2. Lower shell; 22. Motor; 3. Upper valve body; 31. Main channel; 32. Valve body sealing ring; 33. Branch channel; 4. Lower valve body; 5. Three-way valve; 51. First flow controller; 52. Manifold; 53. Sampling pump; 6. Monitor; 61. Detection three-way valve; 62. Second flow controller; 63. Detection pump. Detailed Implementation

[0045] The present application will now be described in detail. While specific embodiments of the present application are shown, it should be understood that the present application can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0046] It should be noted that certain terms are used in the specification and claims to refer to specific components. Those skilled in the art will understand that different terms may be used to refer to the same component. This specification and claims do not distinguish components based on differences in terminology, but rather on differences in function. The terms "comprising" or "including" used throughout the specification and claims are open-ended and should be interpreted as "comprising but not limited to." The following descriptions in the specification are preferred embodiments for carrying out this application; however, these descriptions are for the purpose of understanding the general principles of the specification and are not intended to limit the scope of this application. The scope of protection of this application shall be determined by the appended claims.

[0047] refer to Figure 1 and Figure 2 This application provides a multi-channel acquisition and online monitoring system. The system includes an acquisition device, a sampling pipeline, and a monitoring instrument 6. The sampling pipeline is installed in the target area to collect gas in the target area, and the acquisition device is connected between the sampling pipeline and the monitoring instrument 6.

[0048] The system is designed for real-time monitoring of a target area. The target area can be a single region or multiple regions.

[0049] When the target area includes a sampling area, the data acquisition management only needs to be deployed in one sampling area, and the data acquisition device and monitoring instrument 6 only need to monitor that sampling area in real time.

[0050] When the target area includes multiple independent sampling areas, the sampling pipeline needs to be laid in each sampling area. Then, the sampling device collects samples from the required sampling areas in each sampling area according to the needs; and then the collected samples are transported to the monitoring instrument 6 for real-time monitoring.

[0051] In this application, the target area includes multiple independent sampling areas.

[0052] By laying sampling pipelines in each sampling area, the pipelines can simultaneously collect samples from all sampling areas within the target area. These samples are then transferred to the monitoring instrument 6 for analysis using the collection device. This achieves real-time monitoring of the target area. Furthermore, laying sampling pipelines in the target area makes sampling more convenient and improves the efficiency of real-time monitoring.

[0053] The sampling pipeline includes multiple pipelines respectively set in various sampling areas of the target area; all pipelines are connected to the acquisition device.

[0054] Pipelines located in each sampling zone of the target area are able to take samples within the target area.

[0055] In one specific implementation, the sample taken from the target area is gas from the target area.

[0056] Using pipelines to collect samples from the target area offers several advantages. Firstly, pipeline installation in the target area is convenient, with a simple process and easy construction. This improves pipeline installation efficiency and reduces installation costs. Secondly, the pipelines have excellent sealing properties, which reduces gas leakage, allowing the sample to smoothly enter the monitor 6, and also prevents sample contamination within the pipeline, minimizing the possibility of external gases contaminating the sample.

[0057] refer to Figure 1 and Figure 2After the pipeline collects a sample from the target area, it is transported to the monitoring instrument 6 for monitoring via the acquisition device. Since the various areas within the target area are independent of each other, multiple pipelines are configured to reduce interference between pipelines corresponding to different target areas, with each pipeline corresponding one-to-one with a specific area within the target area. This ensures that each pipeline can sample only its corresponding area.

[0058] The sampling device collects samples from the target area through pipelines. The sampling device is connected to all pipelines, allowing it to sample each area. Furthermore, the integrated sampling device connects to all pipelines; when monitoring is required, only the sampling device needs to be controlled to collect samples from the desired sampling area. This facilitates sample collection and reduces the complexity between the sampling device and management, thereby improving the fault tolerance of both the sampling device and management during sampling.

[0059] refer to Figure 1 and Figure 2 On the other hand, after the sampling device is connected to all pipelines, its other end is connected to the monitoring instrument 6. Therefore, the sampling device is placed close to the monitoring instrument 6, reducing the path between the monitoring instrument 6 and the sampling device. After the sampling device collects a sample, it can be directly transported to the monitoring instrument 6. Furthermore, when collecting samples from multiple sampling areas, the extremely short path between the sampling device and the monitoring instrument 6 minimizes the amount of residual sample between them, further reducing the possibility of interference between samples from multiple sampling areas and improving the accuracy of the monitoring instrument 6 in monitoring the sample areas. This significantly improves the monitoring accuracy and efficiency of the monitoring instrument 6 in monitoring sample areas.

[0060] refer to Figure 2 and Figure 3 The acquisition device includes a housing and a valve body.

[0061] The housing is equipped with a main pipe 11 and a branch pipe 13; the main pipe 11 is connected to the monitoring instrument 6, and the branch pipe 13 is connected to the pipeline.

[0062] refer to Figure 2 and Figure 3 The valve body is located inside the housing and can control the opening and closing of the branch pipe 13 and the main pipe 11.

[0063] There is one main pipeline, which is connected to the monitoring device 6. There are multiple branch pipelines 13, and each branch pipeline 13 is connected to the main pipeline.

[0064] refer to Figure 2 and Figure 3When the valve body rotates inside the housing, it connects the main pipe 11 to one of the multiple branch pipes 13, while simultaneously blocking the remaining branch pipes 13. In other words, the rotation of the valve body inside the housing controls the connection between the main pipe 11 and one and only one branch pipe 13.

[0065] refer to Figure 2 and Figure 3 When sampling the sampling area, the valve body is controlled to rotate so that the pipeline and branch pipeline 13 corresponding to the sampling pipeline are connected to the main pipeline 11. Then the gas in the sampling area passes through the pipeline, branch pipeline 13, and main pipeline 11 in sequence, and then enters the monitor 6 for monitoring.

[0066] Specifically, the number of branch pipes 13 is greater than or equal to the number of sampling areas in the target area. This ensures that at least one pipe and branch pipe 13 correspond to each sampling area, allowing all gas in the sampling area to be sampled into the monitor 6.

[0067] refer to Figure 2 and Figure 3 The distance between the main pipeline 11 and the monitoring instrument 6 is set within a small range.

[0068] After the branch pipe 13 and the pipeline draw gas from the sampling area, the sample is transferred to the main pipe 11 at the housing and valve core. The main pipe 11 then delivers the sample to the monitor 6. When sampling is performed on another sampling area, residual sample gas from the previous sampling area will remain between the main pipe 11 and the monitor 6. Therefore, the gas sampled previously will affect the gas sampled later. To reduce the influence between sample gases from different sampling areas, the main pipe 11 and the monitor 6 are positioned close together, thereby reducing the drying between different gas samples and improving the accuracy of monitoring the target area.

[0069] refer to Figure 2 and Figure 3 The valve body is rotatably connected to the housing, and the valve body can rotate inside the housing.

[0070] The valve body is provided with a main channel 31 and a branch channel 33, and the branch channel 33 is connected to the main channel 31; the main channel 31 is connected to the main pipe 11, and the branch channel 33 can be connected to the branch pipe 13 as the valve body rotates.

[0071] The valve body can rotate inside the housing, and the housing can also block the branch passage 33 on the valve body.

[0072] refer to Figure 2 and Figure 3 In one specific embodiment, both the housing and the valve body are spherical structures.

[0073] refer to Figure 2 and Figure 4 Both the main channel 31 and the branch channel 33 are opened along the outer surface of the valve body towards the inside of the valve body. Furthermore, both branch channels 33 are connected to the outer surface of the valve body, so that the main channel 31 and the branch channel 33 can be connected to the branch pipe 13 and the main pipe 11 on the housing.

[0074] refer to Figure 2 and Figure 4 The main channel 31 coincides with the central axis of the valve body's rotation; therefore, when the valve body rotates, the main channel 31 will not change position. The branch channels 33 are all positioned away from the valve body's rotation axis; therefore, when the valve body rotates, the branch channels 33 will change position accordingly.

[0075] refer to Figure 3 and Figure 4 The main pipe 11 and the main channel 31 are coaxially arranged, and the main pipe 11 is also coaxially arranged with the rotation axis of the valve body. Therefore, when the valve core rotates, the main channel 31 is always connected to the main pipe 11.

[0076] refer to Figure 4 and Figure 5 In one specific embodiment, both the main channel 31 and the branch channels 33 are connected to the center of the valve body, so that the main channel 31 and all the branch channels 33 are connected near the center of the valve body.

[0077] In another specific embodiment, the branch channel 33 is connected to the main channel 31 at a position away from the center of the ball, that is, all branch channels 33 are connected to the main channel 31.

[0078] One end of the branch channel 33 on the outer surface of the valve body is an open end, and the other end connected to the main channel 31 is a connecting end.

[0079] refer to Figure 4 When branch channel 33 is opened on the valve body, the opening end of branch channel 33 coincides with the branch pipe 13 on the housing in the latitudinal direction; that is, when the valve body rotates, the branch pipe 13 is located on the latitude line where the opening end of branch channel 33 is located. This allows the branch channel 33 and branch pipe 13 to be coaxially aligned when the valve body rotates, thereby enabling the branch channel 33 and branch pipe 13 to communicate.

[0080] refer to Figure 2 and Figure 3In one specific embodiment, multiple branch channels 33 are provided. Specifically, the branch channels 33 are used to communicate with the branch pipes 13. Therefore, the number of latitude lines of the housing where all branch pipes 13 are located is the same as the number of branch pipes 13. For example, the branch pipes 13 are respectively located at latitudes of 30° and 45° south and latitudes of 30° and 45° north; that is, the branch pipes 13 are located at the four latitude lines of the housing. Therefore, four branch channels 33 are provided on the valve body, and the opening ends of the four branch channels 33 are respectively located at latitudes of 30° and 45° south and latitudes of 30° and 45° north of the valve body.

[0081] refer to Figure 2 and Figure 3 On the latitude line, multiple branch pipes 13 can also be set. Multiple branch pipes 13 set on the same latitude line will be connected to the same branch channel 33 when the valve body rotates.

[0082] When branch pipes 13 are installed on the shell, each branch pipe 13 is located on a different meridian. That is, all branch pipes 13 do not overlap in the meridian direction. Therefore, when a branch channel 33 is connected to a branch pipe 13, it can only be connected to one of the branch pipes 13, while the other branch channels 33 will not be connected to the branch pipes 13, and the other branch channels 33 will be blocked by the shell.

[0083] One or more branch channels 33 are provided; multiple branch pipes 13 are evenly provided on the shell;

[0084] Preferably, the branch pipes 13 are provided with 4 to 12 in the latitude direction of the shell, and more preferably 8;

[0085] Specifically, the number of branch pipes 13 arranged in the latitude direction of the shell is: 4, 5, 6, 7, 8, 9, 10, 11, 12.

[0086] More preferably, the branch pipes 13 are provided with 2 to 8 in the meridian direction of the shell, and more preferably 4.

[0087] Specifically, the number of branch pipes 13 in the meridian direction of the shell is: 2, 3, 4, 5, 6, 7, 8.

[0088] refer to Figure 4 and Figure 5 In one specific embodiment, the number of branch channels 33 is an even number; preferably, the number of branch channels 33 is 2, 4, 6, 8, 10, or 12, and more preferably, the number of branch channels 33 is 4.

[0089] refer to Figure 4 and Figure 5In one specific embodiment, the number of branch channels 33 is even, and these even-numbered branch channels 33 are evenly distributed at the south and north latitude positions of the valve body, with two branch channels 33 located at the north and south latitude positions respectively arranged coaxially. This results in two coaxially arranged branch channels 33 that penetrate the entire valve body. Furthermore, when manufacturing the branch channels 33 on the valve body, two branch channels 33 can be simultaneously fabricated by directly penetrating the valve body radially at the desired position along the valve body's diameter. This significantly increases the speed of manufacturing the branch channels 33 on the valve body, facilitating the preparation and processing of the valve body and reducing its processing costs. Moreover, the two branch channels 33 penetrating the valve body make maintenance of the valve body and branch channels 33 more convenient. When cleaning the branch channels 33, flushing agent can be directly added to one branch channel 33 and drained from the opposite branch channel 33. This makes cleaning and maintenance of the valve body and branch channels 33 much easier.

[0090] refer to Figure 4 and Figure 5 In this application, the branch pipes 13 on the housing are positioned to avoid opposing positions. Since the branch channels 33 on the valve body are through-type in opposing positions, to ensure that only one branch pipe 13 is connected to the other when they are connected, the branch pipes 13 are positioned symmetrically about the center of the housing. Simultaneously, the branch pipes 13 are positioned on different meridians. Specifically, the two branch pipes 13 on opposing meridians correspond to different latitudes. For example, the two branch pipes 13 on opposing meridians need to be positioned at 45°S and 30°N, or 30°S and 45°N, respectively. This ensures that the branch pipes 13 are not positioned symmetrically about the center of the valve body, thus ensuring that only one branch pipe 13 is connected to the other when they are connected.

[0091] refer to Figure 4 and Figure 5 In one specific embodiment, there are four branch channels 33, and the opening ends of the four branch channels 33 are located at latitudes of 30° and 45° south and 30° and 45° north respectively on the valve body.

[0092] refer to Figure 2 and Figure 3 The housing includes an upper housing 1 and a lower housing 2. The main pipe 11 is installed on the upper housing 1. A motor 22 for driving the valve body to rotate is installed on the lower housing 2. A connection hole for connecting the valve body and the motor 22 is provided on the lower housing 2. A housing sealing ring 12 is provided between the upper housing 1 and the lower housing 2.

[0093] refer to Figure 2 and Figure 3Both the upper housing 1 and the lower housing 2 are hemispherical structures, and are detachably and fixedly connected. Therefore, when processing and manufacturing the housing, the upper housing 1 and the lower housing 2 can be manufactured separately; then, the upper housing 1 and the lower housing 2 can be combined and installed into a spherical housing. This reduces the overall manufacturing difficulty of the spherical housing. Furthermore, the detachable connection between the upper housing 1 and the lower housing 2 makes it easier to install the valve body inside the housing.

[0094] refer to Figure 2 and Figure 3 The connection hole is used to connect the motor 22 to the valve body, so that the motor 22 can drive the valve body to rotate in the housing.

[0095] The housing sealing ring 12 is used to seal the inside of the housing, reducing the possibility of gas leakage from the housing.

[0096] refer to Figure 2 and Figure 3 Preferably, the electrode is a stepper motor 22;

[0097] The stepper motor 22 is driven to rotate by an electrical pulse signal. Therefore, the stepper motor 22 will rotate a certain angle under one electrical pulse signal, thereby driving the valve body to rotate in the housing. The rotation of the valve body in the housing is controlled by the stepper motor 22, and the rotation angle of the valve body is controlled by controlling the electrical pulse signal of the stepper motor 22, so that the branch channel 33 on the valve body can be connected to the preset branch pipe 13.

[0098] More preferably, the stepper motor 22 rotates by 10 to 12 degrees each time.

[0099] More preferably, the stepper motor 22 rotates at an angle of 11.5° each time.

[0100] Specifically, the stepper motor 22 rotates by the following angles each time: 10.1°, 10.2°, 10.3°, 10.4°, 10.5°, 10.6°, 10.7°, 10.8°, 10.9°, 11°, 11.1°, 11.2°, 11.3°, 11.4°, 11.5°, 11.6°, 11.7°, 11.8°, 11.9°, and 12°.

[0101] refer to Figure 2 and Figure 3 Eight branch pipes 13 are arranged along the latitude direction of the shell, and four branch pipes 13 are arranged along the longitude direction of the shell. Therefore, a total of 32 branch pipes 13 are evenly arranged on the shell, and the angle between the latitude lines of each branch pipe 13 is 11.5°. Furthermore, each rotation of the stepper motor 22 by 11.5° causes the branch channel 33 on the valve body to connect with the branch pipes 13 on the shell.

[0102] refer to Figure 2 and Figure 3 When the number of branch pipes 13 on the housing changes, the rotation angle of the stepper motor 22 needs to be controlled simultaneously so that the stepper motor 22 can drive the branch channel 33 on the valve body to connect with the branch pipe 13.

[0103] The valve body includes an upper valve body 3 and a lower valve body 4; a main channel 31 is opened on the upper valve body 3, and a drive hole for connecting the motor 22 is opened on the lower valve body 4; a valve body sealing ring 32 is provided at the connection between the upper valve body 3 and the lower valve body 4.

[0104] refer to Figure 2 and Figure 3 Both the upper valve body 3 and the lower valve body 4 are hemispherical. Due to the spherical structure of the valve body, there may be difficulties in fixing it during manufacturing and processing. Therefore, by setting the valve body into a hemispherical structure for the upper valve body 3 and the lower valve body 4, the processing difficulty of the branch channel 33 and the main channel 31 on the valve body is reduced. At the same time, the split structure of the upper valve body 3 and the lower valve body 4 reduces its own weight, making it easier to install the valve body into the housing. It is also easier for the operator to move the upper valve body 3 into the housing.

[0105] refer to Figure 3 and Figure 4 The valve body sealing ring 32 is used to connect the upper valve body 3 and the lower valve body 4, reducing the possibility of gas leakage inside the valve body.

[0106] refer to Figure 1 A three-way valve 5 is installed on the pipeline, and the three-way valve 5 is located in the target area corresponding to the pipeline.

[0107] refer to Figure 1 The collection pipeline includes a manifold 52 and a sampling pump 53. The sampling pump 53 is connected to the manifold 52, and all pipelines are connected to the manifold 52. A first flow controller 51 is provided on each pipeline.

[0108] refer to Figure 1 The three-way valve 5 is installed in the sampling area of ​​the target area. The gas in the sampling area is taken out through the three-way valve 5.

[0109] The two ends of the pipeline are connected to the sampling pump 53 and the manifold 52 respectively, while the three-way valve 5 is located between the pipelines.

[0110] refer to Figure 1 The pipeline includes a first pipeline disposed between the three-way valve 5 and the manifold 52 and a second pipeline disposed between the three-way valve 5 and the branch pipe 13.

[0111] refer to Figure 1During sampling, the sampling pump 53 will continue to operate, thereby drawing the gas in the sample area into the first pipeline, and the gas in the sample area will continue to circulate in the first pipeline.

[0112] refer to Figure 1 When it is necessary to monitor the sample area, the branch channel 33 corresponding to the sample area is connected to the branch pipe 13. The sample gas in the first pipe is drawn into the second pipe, and then enters the main channel 31 and the main pipe 11 through the second pipe and the branch pipe 13 and branch channel 33, and finally enters the monitor 6 for monitoring.

[0113] refer to Figure 1 The sampling pump 52 simultaneously pumps gas into all pipelines, drawing all the gas in the target area into the first pipeline; meanwhile, the sampling pump 53 continuously pumps, ensuring that the gas in the first pipeline is consistent with the gas in the sample area. This increases the accuracy of sample detection in the target area.

[0114] The flow rate on the pipeline is 5 to 20 L / min; preferably 10 L / min.

[0115] Specifically, the flow rates on the pipeline are 5L / min, 6L / min, 7L / min, 8L / min, 9L / min, 10L / min, 11L / min, 12L / min, 13L / min, 14L / min, 15L / min, 16L / min, 17L / min, 18L / min, 19L / min, and 20L / min.

[0116] refer to Figure 1 The first flow controller 51 is used to monitor the gas flow rate in the first pipeline, so that the gas in the first pipeline is in a circulating state, thereby making the gas in the first pipeline consistent with the gas in the sample area.

[0117] refer to Figure 1 A detection three-way valve 61 is provided between the data acquisition device and the monitoring instrument 6; a detection pump 63 is connected to the detection three-way valve 61, and a second flow controller 62 is provided between the detection pump 63 and the detection three-way valve 61.

[0118] The flow rate at the three-way valve 61 is detected to be 0.5–5 L / min; preferably 1 L / min.

[0119] Specifically, the flow rates detected at the three-way valve 61 are: 0.5L / min, 0.6L / min, 0.7L / min, 0.8L / min, 0.9L / min, 1L / min, 1.1L / min, 1.2L / min, 1.3L / min, 1.4L / min, 1.5L / min, 1.6L / min, 1.7L / min, 1.8L / min, 1.9L / min, 2L / min, 2.1L / min, 2.2L / min, 2.3L / min, 2.4L / min, 2.5L / min, and 2.6L / min. , 2.7L / min, 2.8L / min, 2.9L / min, 3L / min, 3.1L / min, 3.2L / min, 3.3L / min, 3.4L / min, 3.5L / min, 3.6L / min, 3.7L / min, 3.8L / mi n, 3.9L / min, 4L / min, 4.1L / min, 4.2L / min, 4.3L / min, 4.4L / min, 4.5L / min, 4.6L / min, 4.7L / min, 4.8L / min, 4.9L / min, 5L / min.

[0120] refer to Figure 1 The detection pump 63 is used to pump the sample gas from the first pipeline and the three-way valve 5. The detection pump 63 operates continuously, and the sample gas at the three-way valve 5 is diverted to the second pipeline and pumped by the detection pump 63. Then, the sample gas passes through the branch pipeline 13 and the main pipeline 11 and enters the detection pump 63. The three ports of the detection three-way valve 61 are connected to the main pipeline, the monitor 6 and the detection pump 63, respectively.

[0121] The sample gas enters the three-way valve 5 through the main pipeline 11, and then a small amount of sample gas is transported to the instrument for detection by the pump or differential pressure built into the monitor 6.

[0122] This application also provides a method for multi-channel data acquisition and online monitoring using the above-described system, comprising the following steps:

[0123] Gas circulation pipelines are placed in multiple target areas respectively;

[0124] The sampling end of the pipeline is located in the target area;

[0125] Each sampling end acquires a sample in its respective target area;

[0126] The control sampling device delivers samples from the desired target area to the monitoring instrument;

[0127] The data acquisition device is located near the monitoring instrument.

[0128] A sampling device is used to collect samples from the target area. The collected samples are then transported to the sampling device via tubing; the sampling device then transports the samples to the monitoring instrument. Because the sampling device is used to sample the target area, it is placed close to the monitoring instrument to reduce the distance between them. This reduces the amount of residual gas between the sampling device and the monitoring instrument, thus minimizing interference from residual gas and improving the monitoring accuracy of the target area.

[0129] The flow rate of the pipeline during sampling is 5 to 20 L / min; preferably 10 L / min.

[0130] Specifically, the flow rates of the sampling pipelines are 5L / min, 6L / min, 7L / min, 8L / min, 9L / min, 10L / min, 11L / min, 12L / min, 13L / min, 14L / min, 15L / min, 16L / min, 17L / min, 18L / min, 19L / min, and 20L / min.

[0131] The flow rate when transporting the sample to the monitor 6 is 0.5 to 5 L / min; preferably 1 L / min.

[0132] Specifically, the flow rates for the sample value monitoring instrument 6 are: 0.5L / min, 0.6L / min, 0.7L / min, 0.8L / min, 0.9L / min, 1L / min, 1.1L / min, 1.2L / min, 1.3L / min, 1.4L / min, 1.5L / min, 1.6L / min, 1.7L / min, 1.8L / min, 1.9L / min, 2L / min, 2.1L / min, 2.2L / min, 2.3L / min, 2.4L / min, 2.5L / min, and 2.6L / min. n, 2.7L / min, 2.8L / min, 2.9L / min, 3L / min, 3.1L / min, 3.2L / min, 3.3L / min, 3.4L / min, 3.5L / min, 3.6L / min, 3.7L / min, 3.8L / mi n, 3.9L / min, 4L / min, 4.1L / min, 4.2L / min, 4.3L / min, 4.4L / min, 4.5L / min, 4.6L / min, 4.7L / min, 4.8L / min, 4.9L / min, 5L / min.

[0133] A three-way valve 5 is installed at the sampling end of the pipeline; all pipelines are connected to the manifold 52.

[0134] Using manifolds to connect the pipelines allows for simultaneous circulation of gas within the target area, ensuring that the gas in the pipeline remains consistent with the gas in the target area. When a gas leak occurs in the target area, the leaking gas can be immediately drawn into the pipeline, and the sampling device can then collect a sample containing the leaked gas, resulting in more timely sample collection.

[0135] The three-way valve 5 is connected to the sampling pump 53 that supplies gas circulation, the target area, and the sampling device, respectively. This allows the pipeline to simultaneously circulate gas to the target area and allow the sampling device to sample the target area.

[0136] In summary, for reference Figure 1 This figure shows the overall structure of a multi-channel acquisition and online monitoring system. A three-way valve 5 is connected to the pipeline. The three-way valve 5 is set in the target area and used to take samples. Then, the sampled gas in the pipeline is transported to the monitor 6 for real-time detection through the acquisition device.

[0137] One end of the pipeline is connected to a manifold 52, and a sampling pump is connected to the manifold 52. The sampling pump draws gas from the target area into the pipeline, while the first flow controller 51 controls the flow rate in the pipeline at 10 L / min, ensuring equal flow rates in all pipelines and enabling rapid sample collection from the target area. All pipelines are connected via the manifold 52, allowing sampling from all pipelines to be performed using a single sampling pump.

[0138] refer to Figure 2 This figure shows the exploded structure of the data collection device. The shell is spherical or near-spherical and is composed of an upper shell 1 and a lower shell 2. The upper shell 1 and the lower shell 2 are connected by bolts, and a shell sealing ring 12 is used to seal between the upper shell 1 and the lower shell 2 to reduce the possibility of gas leakage inside the shell.

[0139] The housing has a hollow structure, and the valve body is located inside the housing. The inner surface of the housing is adapted to the outer surface of the valve body, so that the valve body can rotate inside the housing after it is placed inside the housing. At the same time, the main channel 31 and the branch channel 41 on the valve body can be connected to the main pipe 11 and the branch pipe 21 on the housing.

[0140] The valve body is composed of an upper valve body 3 and a lower valve body 4, which are connected by a valve body sealing ring 32 to maintain a seal between them.

[0141] The housing and valve body are designed as two separate structures, one above the other. This allows the housing and valve body to be disassembled for inspection in case of a malfunction, making the maintenance of the housing and valve body more convenient and the troubleshooting and repair of the malfunctions easier.

[0142] refer to Figure 3 This figure is a cross-sectional view of the data acquisition device. As can be seen from the figure, the valve body is located inside the housing, and the outer surface of the valve body is in contact with the inner surface of the housing, so that the valve body and the housing are sealed. The branch channel 41 in the valve body is a through hole that runs through the entire valve body. When the valve body rotates, the branch channel 41 can communicate with the corresponding branch pipes 21 on the upper housing 1 and the lower housing 2.

[0143] The output shaft of the motor 22 passes through the lower housing 2 and is connected to the connection hole of the lower valve body 4, thereby enabling the motor 22 to drive the valve body to rotate inside the housing.

[0144] When the motor 22 drives the valve body to rotate, the outlet end of the branch channel 41 will rotate within the same latitude range of the valve body, while the branch pipes 21 are set within different latitude ranges of the housing. Therefore, the number of branch channels 41 is equal to the number of branch pipes 21 in the longitudinal direction. This allows the main pipe 11 to connect with each branch pipe 21 when the valve body rotates inside the housing.

[0145] The two branch channels 41 opposite to the upper valve body 3 and the lower valve body 4 are coaxially arranged. Therefore, when manufacturing the branch channels 41, the two branch channels 41 can pass through the valve body. This facilitates the manufacturing of the branch channels 41 and makes the maintenance of the branch channels 41 more convenient.

[0146] refer to Figure 4 This image is an exploded view of the valve body, and also... Figure 3 A partially enlarged view of the valve body structure. The upper valve body 3 has a main channel 31 and a branch channel 33, while the lower valve body 4 has a branch channel 33. A connection hole for connecting to a stepper motor 22 is located at the end of the lower valve body 4. The drive shaft of the stepper motor 22 is fixedly connected to the valve body through the connection hole, and the stepper motor 22 drives the valve body to rotate. This allows the branch channel 33 on the valve body to communicate with the branch pipe 13 on the housing.

[0147] refer to Figure 5This figure shows a cross-sectional view of the internal structure of the valve body. As can be seen, the main channel 31 extends from the outer surface of the valve body to its center. Four branch channels 33 are provided, coaxially positioned on both the upper valve body 3 and the lower valve body 4, allowing two branch channels 33 to penetrate the valve body. All branch channels 33 are located at the center of the valve body and connect to the main pipe 11. Therefore, when gas passes through the branch pipe 13 and enters the branch channel 33, it can then enter the main channel 31. Afterward, it is sent to the monitor 6 for monitoring.

[0148] Throughout the monitoring process, both sampling pump 53 and detection pump 63 continuously extract sample gas. Most of the sample gas is discharged from the sample area after passing through three-way valve 5, first flow controller 51, manifold 52, and sampling pump 53. A portion of the sample gas is diverted from three-way valve 5 by detection pump 63 and enters branch pipe 13. Through valve switching, it enters main pipe 11 and detection three-way valve 61. Most of this portion of sample gas is discharged through second flow controller 62 and detection pump 63. A small portion of the sample gas is extracted into the monitor 6 for detection through the pressure differential or pump built into the monitor 6 (such as PTR-TOF).

[0149] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A system for multichannel acquisition and online monitoring, characterized in that, The system comprises a collecting device, a sampling pipeline and a monitor, the sampling pipeline is arranged in a target area to collect gas in the target area, and the collecting device is connected between the sampling pipeline and the monitor; The sampling pipeline comprises a plurality of pipelines arranged in respective target areas; All the pipelines are connected with the collecting device; The collecting device comprises a shell, a main pipeline and a branch pipeline are arranged on the shell, the main pipeline is connected with the monitor, and the branch pipeline is connected with the pipelines; The valve body is arranged in the shell, and the valve body can control the opening and closing of the branch pipeline and the main pipeline.

2. The system of claim 1, wherein, The valve body is rotationally connected with the shell, and the valve body can rotate in the shell.

3. The system of claim 1 or 2, wherein, A main channel and a branch channel are formed in the valve body, the branch channel is connected with the main channel, the main channel is connected with the main pipeline, and the branch channel can be connected with the branch pipeline by rotating the valve body.

4. The system of claim 3, wherein, The branch pipeline is uniformly provided with a plurality of branch pipelines on the shell.

5. The system of claim 4, wherein, The branch pipeline is provided with 4-12 branch pipelines in the weft direction of the shell.

6. The system of claim 5, wherein, The branch pipeline is provided with 8 branch pipelines in the weft direction of the shell.

7. The system of claim 6, wherein, The branch pipeline is provided with 2-8 branch pipelines in the warp direction of the shell.

8. The system of claim 4, wherein, The branch pipeline is provided with 4 branch pipelines in the warp direction of the shell.

9. The system of claim 1, wherein, The shell comprises an upper shell and a lower shell, the main pipeline is arranged on the upper shell, a motor for driving the valve body to rotate is arranged on the lower shell, a connecting hole for connecting the valve body and the motor is formed in the lower shell, and a shell sealing ring is arranged between the upper shell and the lower shell.

10. The system of claim 9, wherein, The motor is a stepping motor.

11. The system of claim 10, wherein, The rotation angle of the stepping motor is 10-12° each time.

12. The system of claim 10, wherein, The rotation angle of the stepping motor is 11.5° each time.

13. The system of claim 3, wherein, The valve body comprises an upper valve body and a lower valve body, a main channel is formed in the upper valve body, a driving hole for connecting the motor is formed in the lower valve body, and a valve body sealing ring is arranged at the connection between the upper valve body and the lower valve body.

14. The system of claim 1, wherein, A three-way valve is arranged on the pipeline, and the three-way valve is arranged in a target area corresponding to the pipeline.

15. The system of claim 1, wherein, A first flow controller is arranged on each pipeline.

16. The system of claim 15, wherein, The flow rate of the pipeline is 5-20 L / min.

17. The system of claim 15, wherein, The flow rate of the pipeline is 10 L / min.

18. The system of claim 1, wherein, A detection three-way valve is arranged between the collecting device and the monitor, a detection pump is connected with the detection three-way valve, and a second flow controller is arranged between the detection pump and the detection three-way valve.

19. The system of claim 18, wherein, The flow rate of the detection three-way valve is 0.5-5 L / min.

20. The system of claim 18, wherein, The flow rate of the detection three-way valve is 1 L / min.

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