Underway type automatic sampling and filtering device

Abstract

A sailing type automatic sampling and filtering device is provided with a first three-way valve, a sampling pump, a second three-way valve, at least two parallel filtering channels, a third three-way valve, a fourth three-way valve, a sampling cup and a backwashing barrel, the first three-way valve is controlled to switch the sampling pump to be communicated with the water sample cup or the waste liquid tank; the sampling pump is a forward and reverse reversible sampling pump and is controlled to switch the extraction direction of materials therein; the second three-way valve is respectively connected with one ends of at least two filtering channels connected in parallel, and the controlled switching sampling pump is communicated with one filtering channel; the third three-way valve is in flow path connection with the other ends of the at least two filtering channels connected in parallel, and the fourth three-way valve is controlled to be switched to be communicated with one filtering channel; the fourth three-way valve is in flow path connection with the sampling cup and the backwashing barrel, and the controlled switching sampling cup is communicated with the third three-way valve or the backwashing barrel; sampling filtering or backwashing is carried out by controlling the extraction direction of the sampling pump, and meanwhile, a filtering channel is switched so as to facilitate replacement and cleaning.

Description

Technical Field

[0001] This utility model relates to the field of water quality testing and filtration, and in particular to a mobile automatic sampling and filtration device. Background Technology

[0002] With the increasing frequency of marine pollution incidents and the deepening of marine water research, higher demands are being placed on the real-time nature, accuracy, and coverage of water quality monitoring. Marine monitoring vessels, due to their portability and the diverse range of instruments they can carry, have become an important channel for acquiring marine data.

[0003] Traditional sampling methods involve three stages: manual sampling, manual filtering, and transfer detection. The entire process relies on manual labor, making it susceptible to interference from factors such as operator skill level and environmental temperature and humidity, leading to difficulties in sample traceability and the risk of data mismatch. Meanwhile, mobile monitoring typically requires more than 10 sampling points per hour, which is difficult to match with manual efficiency.

[0004] With the development of mobile monitoring technology, automatic water sampling has been achieved. However, filtration units still have some drawbacks, such as lack of automation or the need for frequent intervention. Currently, the commonly used filtration method is column filtration. One water sampling and filtration device, mainly used for laboratory testing, integrates multiple small filter columns and switches the filtration mode by switching valves. However, it has low automation, complex structure, and cumbersome maintenance. Another mobile continuous treatment, sampling, and multi-parameter water quality monitoring device uses an overly simple filtration channel, resulting in a short filter column lifespan.

[0005] Therefore, developing a water sample pretreatment system for mobile monitoring that can automatically collect and filter water, requires minimal maintenance, and automatically interface with testing instruments is a key direction for overcoming the contradiction between monitoring efficiency and manual workload, and is of great significance. Utility Model Content

[0006] The purpose of this invention is to develop a mobile automatic water sampling and filtration device with high integration, low maintenance cost, and long service life.

[0007] To achieve the above objectives, this utility model discloses a mobile automatic sampling and filtration device, comprising a first three-way valve, a sampling pump, a second three-way valve, at least two parallel filtration channels, a third three-way valve, a fourth three-way valve, and a sampling cup, which are sequentially connected by a flow path.

[0008] The first three-way valve is also connected to the flow path of the water sample cup and the waste liquid tank, and the sampling pump is switched to be connected to the water sample cup or the waste liquid tank in a controlled manner;

[0009] The sampling pump is a reversible sampling pump that can switch the direction of material extraction in a controlled manner.

[0010] The second three-way valve is connected to one end of at least two parallel filter channels respectively, and the sampling pump is controlled to be connected to one of the filter channels; the third three-way valve is connected to the other end of at least two parallel filter channels respectively, and the fourth three-way valve is controlled to be connected to one of the filter channels.

[0011] The fourth three-way valve is also connected to the flow path of a backwash tank, and the third three-way valve is controlled to switch the connection between the sampling cup or the backwash tank.

[0012] The first three-way valve, the sampling pump, the second three-way valve, the third three-way valve, and the fourth three-way valve are controlled by a single controller.

[0013] The sampling pump is started and sequentially connected to the water sample cup, the first three-way valve, the sampling pump, the second three-way valve, at least two parallel filter channels, the third three-way valve, the fourth three-way valve, and the sampling cup to form a sampling and filtration channel. The flow path of at least two parallel filter channels is switched to operate.

[0014] Furthermore, the sampling pump is started in reverse and sequentially flows through the sampling cup, the fourth three-way valve, the third three-way valve, at least two parallel filter channels, the second three-way valve, the sampling pump, the first three-way valve, and the waste liquid tank to form the first backwash flow path. The flow path of at least two parallel filter channels is then switched to perform the rinsing operation.

[0015] Furthermore, the sampling pump is started in reverse and sequentially flows through the backwash tank, the fourth three-way valve, the third three-way valve, at least two parallel filter channels, the second three-way valve, the sampling pump, the first three-way valve, and the waste liquid tank to form a second backwash flow path. The flow path of at least two parallel filter channels is then switched to perform the rinsing operation.

[0016] Furthermore, at least one pressure sensor is installed in the flow path between the sampling pump and the second three-way valve to measure the pressure of the flowing material and to be controlled by the controller.

[0017] Furthermore, each of the at least two parallel filtration channels is composed of at least two filter columns connected in series.

[0018] Furthermore, an external analyzer is connected to collect water samples from the sampling cup for testing and analysis.

[0019] Furthermore, the upper end of the sampling cup wall is provided with an overflow port. After the filtered water sample flows out of the overflow port for a preset time, the sampling pump is turned off, and the analyzer performs sampling and analysis.

[0020] Furthermore, a device housing is provided, inside which are disposed the first three-way valve, sampling pump, second three-way valve, at least two parallel filter channels, third three-way valve, fourth three-way valve, and sampling cup; the water sample cup, waste liquid tank, and backwashing bucket are disposed outside the device housing; the device housing is also provided with a flow path window, the first three-way valve extends outward through a pipe to connect with the flow path of the water sample cup and waste liquid tank, and the fourth three-way valve extends outward through a pipe to connect with the flow path of the backwashing bucket.

[0021] This invention employs multi-stage filtration with two sets of filtration channels, serving as backups for each other. The system monitors the pressure in the filtration channels in real time. When the pressure exceeds a set threshold, an alarm is issued, and the controller automatically switches to the other backup filtration channel. After sampling and filtration are completed, the sampling pump reverses to backwash the filter column, effectively extending its service life and reducing maintenance workload during mobile testing. It is used for automatic water sample collection and filtration during mobile testing, featuring high automation and integration, and solving problems such as short filter column lifespan, low system automation and integration, and high maintenance workload inherent in conventional mobile water sampling and filtration processes. Attached Figure Description

[0022] The specific description given as a non-limiting example better explains what this utility model includes and how it can be implemented. Furthermore, this description refers to the accompanying drawings, in which:

[0023] Figure 1 This is a three-dimensional exploded view of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the connection relationship of this utility model;

[0025] Figure 3 This is a schematic diagram of the sampling and filtering process of this utility model;

[0026] Figure 4 This is a schematic diagram of the first backwashing flow path of this utility model;

[0027] Figure 5 This is a schematic diagram of the second backwashing flow path of this utility model.

[0028] Label Explanation:

[0029] 100 - Device housing; 101 - Flow path window; 102 - Viewing window; 103 - Circuit board; 11 - First three-way valve; 2 - Sampling pump; 3 - Second three-way valve; 41, 61 - Two parallel filter channels; 4, 5, 6, 7 - Filter columns; 8 - Third three-way valve; 12 - Fourth three-way valve; 9 - Sampling cup; 91 - Top cover; 92 - Base; 14 - Overflow port; 15 - Backwash tank; 17 - Water sample cup; 16 - Waste liquid tank; 10 - Pressure sensor; 13 - Analyzer. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0031] like Figures 1-5 As shown, a mobile automatic sampling and filtration device includes a housing 100. Inside the housing 100, a first three-way valve 11, a sampling pump 2, a second three-way valve 3, two parallel filtration channels 41 and 61, a third three-way valve 8, a fourth three-way valve 12, and a sampling cup 9 are sequentially arranged in a flow path connection. Outside the housing 100, a water sample cup 17, a waste liquid tank 16, and a backwashing tank 15 are provided. The housing 100 also includes a flow path window 101, a viewing window 102, and a control circuit board 103 (controller). The flow path window 101 is used to connect the internal and external flow paths, specifically... The first three-way valve 11 extends outward through a pipeline to the flow path window 101 and is connected to the flow path of the water sample cup 17 and the waste liquid tank 16. The fourth three-way valve 12 extends outward through a pipeline to the flow path window 101 and is connected to the flow path of the backwash tank 15. The viewing window 102 is used to observe the internal experimental conditions during the experiment. The control circuit board 103 is used to electrically connect each three-way valve, the sampling pump 2 and the pressure sensor to realize process control. The sampling cup 9 is provided with a corresponding upper cover 91 and a base 92. The upper cover 9 is provided with a sampling hole, which is convenient for the analyzer to extract water samples for testing. The upper side wall of the sampling cup 9 is provided with an overflow port 14.

[0032] like Figure 2 As shown, the first three-way valve 11 is simultaneously connected to the water sample cup 17, the waste liquid tank 16 and the sampling pump 2 flow path, and the sampling pump 2 is switched in a controlled manner to be connected to the water sample cup or the waste liquid tank 16.

[0033] The sampling pump 2 is a reversible sampling pump that can rotate in both directions. It is connected to the flow path of the first three-way valve 11 and the second three-way valve 3, and the extraction direction of the material is switched under control.

[0034] The second three-way valve 3 is also connected to one end of the two parallel filter channels 41 and 61 respectively, and the sampling pump 2 is switched to conduct with one of the filter channels under control; the third three-way valve 8 is connected to the other end of the two parallel filter channels 41 and 61 respectively, and is also connected to the flow path of the fourth three-way valve 12, and the fourth three-way valve 12 is switched to conduct with one of the filter channels under control.

[0035] The fourth three-way valve 12 is also connected to the flow path of the sampling cup 9 and the backwash tank 15, and can controllably switch the sampling cup 9 to be connected to the third three-way valve 8 or the backwash tank 15.

[0036] The sampling pump 2 is started, sequentially connecting the water sample cup, the first three-way valve 11, the sampling pump 2, the second three-way valve 3, the two parallel filter channels, the third three-way valve 8, the fourth three-way valve 12, and the sampling cup 9 to form a sampling and filtration channel. One of the two parallel filter channels 41 and 61 is then selected for operation. In this embodiment, filter channel 61 is used for demonstration. Figure 3 As shown.

[0037] The sampling pump 2 is started in reverse, sequentially connecting the sampling cup 9, the fourth three-way valve 12, the third three-way valve 8, the two parallel filter channels, the second three-way valve 3, the sampling pump 2, the first three-way valve 11, and the waste liquid tank 16 to form the first backwash flow path. The flow path is then switched between the two parallel filter channels 41 and 61 for backwashing. Figure 4 As shown.

[0038] The sampling pump 2 is started in reverse, sequentially connecting the backwash tank 15, the fourth three-way valve 12, the third three-way valve 8, the two parallel filter channels, the second three-way valve 3, the sampling pump 2, the first three-way valve 11, and the waste liquid tank 16 to form a second backwash flow path. The flow path is then switched between the two parallel filter channels 41 and 61 for rinsing. Figure 5 As shown.

[0039] At least one pressure sensor 10 is installed in the flow path between the sampling pump 2 and the second three-way valve 3 to measure the pressure of the flowing material and feed it back to the control circuit board 103.

[0040] The two parallel filtration channels 41 and 61 are each composed of at least two filter columns connected in series, such as Figures 2-5 As shown, one filter channel 41 is composed of filter columns 4 and 5 connected in series, and another filter channel 61 is composed of filter columns 6 and 7 connected in series. In other embodiments, the number of filter columns can be increased or decreased according to actual needs, and the number of parallel filter channels can also be increased according to actual needs.

[0041] An external analyzer 13 is connected to collect water samples from sampling cup 9 for testing and analysis.

[0042] During operation, the sampling and filtration channels are first activated. Three-way switching valves 3, 8, 11, and 12 are then activated to switch to the sampling and filtration channels connecting water sample cup 17, filter columns 6 and 7, and sampling cup 9. Next, sampling pump 2 is started. The water sample, after being filtered through filter columns 6 and 7, flows into sampling cup 9. The filtered water sample flows out from overflow port 14 of sampling cup 9. After a certain period, sampling pump 2 stops, completing the rinsing and sampling process. Analyzer 13 is then started to take samples from sampling cup 9 for measurement. Because this is a mobile, automated seawater sampling and detection system, it means that under normal circumstances, this sampling and detection is uninterrupted. The multiple parallel filtration channels can effectively overcome some unexpected situations. When one filtration channel is performing filtration, the filter columns in other filtration channels can be replaced or repaired / maintained.

[0043] After the analyzer 13 has finished collecting samples, as Figure 4 As shown, the first backwashing flow path is started, the three-way switching valve 11 is started to open the waste liquid tank 16 channel, the sampling pump 2 is started to reverse, the remaining water sample in the sampling cup 9 is back-drawn back, the filter columns 6 and 7 are backwashed, and the backwashed water sample is discharged into the waste liquid tank 16 without contaminating the water sample to be drawn.

[0044] Furthermore, to ensure the backwashing effect of the filter column, after the remaining water sample in the water sample cup has been back-extracted, as follows: Figure 5 As shown, start the three-way switching valve 12 to open the backwash tank 15, start the sampling pump 2, and use the flushing water in the backwash tank 15 to further backwash the filter columns 6 and 7 to extend the filter column life.

[0045] During filtration, the system monitors the pipeline pressure in real time through pressure sensor 10. When the pressure reaches the set value, it means that there are too many impurities in filter columns 6 and 7. An alarm is issued and the system automatically switches to another filtration channel (filter columns 4 and 5) through three-way switching valves 3 and 8 to operate.

[0046] The above embodiments and illustrations are not intended to limit the product form and style of this utility model. Any appropriate changes and modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A mobile automatic sampling and filtering device, characterized in that, It includes a first three-way valve, a sampling pump, a second three-way valve, at least two parallel filter channels, a third three-way valve, a fourth three-way valve, and a sampling cup, which are connected in sequence through the flow path. The first three-way valve is also connected to the flow path of the water sample cup and the waste liquid tank, and the sampling pump is switched to be connected to the water sample cup or the waste liquid tank in a controlled manner; The sampling pump is a reversible sampling pump that can switch the direction of material extraction in a controlled manner. The second three-way valve is connected to one end of at least two parallel filter channels respectively, and the sampling pump is controlled to be connected to one of the filter channels; the third three-way valve is connected to the other end of at least two parallel filter channels respectively, and the fourth three-way valve is controlled to be connected to one of the filter channels. The fourth three-way valve is also connected to the flow path of a backwash tank, and the third three-way valve is controlled to switch the connection between the sampling cup or the backwash tank. The first three-way valve, the sampling pump, the second three-way valve, the third three-way valve, and the fourth three-way valve are controlled by a single controller. The sampling pump is started and sequentially connected to the water sample cup, the first three-way valve, the sampling pump, the second three-way valve, at least two parallel filter channels, the third three-way valve, the fourth three-way valve, and the sampling cup to form a sampling and filtration channel. The flow path of at least two parallel filter channels is switched to operate.

2. The mobile automatic sampling and filtering device as described in claim 1, characterized in that: The sampling pump is started in reverse and sequentially flows through the sampling cup, the fourth three-way valve, the third three-way valve, at least two parallel filter channels, the second three-way valve, the sampling pump, the first three-way valve, and the waste liquid tank to form the first backwash flow path. The flow path of at least two parallel filter channels is then switched to perform the rinsing operation.

3. The mobile automatic sampling and filtering device as described in claim 1, characterized in that: The sampling pump is started in reverse and sequentially flows through the backwash tank, the fourth three-way valve, the third three-way valve, at least two parallel filter channels, the second three-way valve, the sampling pump, the first three-way valve, and the waste liquid tank to form a second backwash flow path. The flow path of at least two parallel filter channels is then switched to perform the rinsing operation.

4. The mobile automatic sampling and filtering device as described in claim 1, characterized in that: At least one pressure sensor is installed in the flow path between the sampling pump and the second three-way valve to measure the pressure of the flowing material and feed it back to the controller.

5. The mobile automatic sampling and filtering device as described in claim 1, characterized in that: The at least two parallel filtration channels are each composed of at least two filter columns connected in series.

6. The mobile automatic sampling and filtering device as described in claim 1, characterized in that: An external analyzer is connected to collect water samples from the sampling cup for testing and analysis.

7. The mobile automatic sampling and filtering device as described in claim 6, characterized in that: The sampling cup has an overflow port at the upper end of its wall. After the filtered water sample flows out of the overflow port for a preset time, the sampling pump is turned off, and the analyzer performs sampling and analysis.

8. The mobile automatic sampling and filtering device as described in claim 1, characterized in that: The device is provided with a housing, inside which are a first three-way valve, a sampling pump, a second three-way valve, at least two parallel filter channels, a third three-way valve, a fourth three-way valve, and a sampling cup; outside the housing are the water sample cup, the waste liquid tank, and the backwashing bucket; the housing is also provided with a flow path window, through which the first three-way valve extends outward via a pipe and connects to the flow path of the water sample cup and the waste liquid tank, and through which the fourth three-way valve extends outward via a pipe and connects to the flow path of the backwashing bucket.

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