Sampling and Storage Flow Path and Sampling and Storage Device

Abstract

This application discloses a sampling and storage flow path and a sampling and storage device. The sampling and storage device includes a distribution and diversion system, a sampling pipeline, and an emptying pipeline. The distribution and diversion system has a flow path combination of at least one common port and n distribution ports. The common port can selectively connect one of the distribution ports or not connect at all. The sampling pipeline is equipped with a first actuator and extends from the sampling inlet a to the connection point f. A valve / pump group is installed at the connection point d in the sampling pipeline. The first distribution port and the main port of the valve / pump group are respectively connected to the first actuator and the common port. The emptying pipeline extends from the second distribution port of the valve / pump group to the sample outlet k. A second actuator is installed in the sampling pipeline or the emptying pipeline between the connection point d and the connection point f. The connection point f is connected to the distribution and diversion system through a connecting pipeline. According to the technical solution of this application, the sampling and storage device can achieve water sampling, sample retention, and emptying with fewer components, reducing the space occupied by the flow path.

Description

Technical Field

[0001] This application relates to the field of environmental monitoring technology, and more specifically, to a sampling and storage flow path and a sampling and storage device. Background Technology

[0002] In online water quality monitoring systems, it is often necessary to use sampling and storage devices to collect and store water samples.

[0003] However, how to distribute and guide water samples in sampling and storage devices has become a major challenge. Existing sampling and storage devices mostly use stepper motors to drive the rotation of the distribution arm or the horizontal and vertical positioning movement of the distribution port, injecting different liquid samples into different sample bottles or guide plates (each outlet of the guide plate injects liquid samples into the sample bottles). Therefore, the automatic sampler needs to reserve space for the movement of the distribution arm or distribution port, resulting in a large size and limited application. On the other hand, existing sample distribution devices have many components, are expensive, inconvenient to maintain, and cannot be emptied.

[0004] Therefore, how to provide a solution that at least partially overcomes the above-mentioned defects has become a technical problem that needs to be solved in this field. Summary of the Invention

[0005] In view of this, this application proposes a sampling and storage device and a sampling and storage flow path. By guiding and controlling the flow direction of the liquid through a conduit, it can achieve water collection, sample supply, and emptying with fewer components, reducing the space occupied by the sampling and storage device. Moreover, through reverse control of the actuator, the liquid can flow in reverse, allowing the liquid in the sampling and storage device to be emptied. Furthermore, this device is rationally designed, compact in structure, and small in size.

[0006] According to one aspect of this application, a sampling and storage flow path is proposed, the sampling and storage flow path including a distribution and diversion system, a sampling pipeline and an emptying pipeline.

[0007] The distribution and diversion system has a flow path combination of at least one common port and n distribution ports. The common port can selectively connect one of the distribution ports or all of them can be deactivated. The distribution ports divert liquid to the sample bottle through diversion pipelines, where n is a natural number greater than or equal to 2. The sampling pipeline is equipped with a first actuator, extending from the sampling inlet a to the connection point f. The connection point d in the sampling pipeline is equipped with a first valve / pump group. The first distribution port and the main port of the first valve / pump group are respectively connected to the first actuator and the common port. The drain pipeline extends from the second distribution port of the first valve / pump group to the sample outlet k. The sampling pipeline or the drain pipeline between the connection point d and the connection point f is equipped with a second actuator. The connection point f is connected to the distribution and diversion system through a connecting pipeline.

[0008] Preferably, the sampling and storage flow path includes a liquid storage and mixing module, the liquid enters the liquid storage and mixing module from the connection point b, the lower part of the liquid storage and mixing module is connected to the connection point d, and the liquid storage and mixing module includes at least one mixing tank.

[0009] Preferably, the sampling and storage flow path includes two mixing tanks. The main port of the second valve / pump group is connected to the connection point b. Liquid enters mixing tank A from the first distribution port of the second valve / pump group. The lower part of mixing tank A is connected to the first distribution port of the third valve / pump group. Liquid enters mixing tank B from the second distribution port of the second valve / pump group. The lower part of mixing tank B is connected to the second distribution port of the third valve / pump group. The main port of the third valve / pump group is connected to the first distribution port of the first valve / pump group.

[0010] Preferably, the sampling and storage flow path includes a sample supply pipeline, and a fifth valve / pump group is provided at the connection point f. The main port and the first distribution port of the fifth valve / pump group are respectively connected to the sampling pipeline and the common port. The sample supply pipeline extends from the second distribution port of the fifth valve / pump group to the sample outlet m.

[0011] Preferably, the sampling and storage flow path includes a reflux pipeline, wherein the liquid in the sample supply pipeline flows from the sample supply outlet m through the analytical instrument for sampling to the instrument outlet n, one end of the reflux pipeline is connected to the instrument outlet n, and the other end is connected to the pipeline between the first driver and the valve / pump group.

[0012] Preferably, the sampling flow path includes an instantaneous sampling flow path, and a fourth valve / pump group is provided at the connection point i between the sampling pipelines. The main port and the first distribution port of the fourth valve / pump group are respectively connected to the sampling pipeline and the sampling pipeline. The instantaneous sampling flow path extends from the second distribution port of the fourth valve / pump group to the sample outlet m.

[0013] Preferably, the sampling and storage flow path includes a manual sampling pipeline, and a sixth valve / pump group is provided at the connection point e on the sampling pipeline. The main port and the first distribution port of the sixth valve / pump group are respectively connected to the sampling pipeline and the sampling pipeline. The manual sampling pipeline extends from the second distribution port of the fifth valve / pump group to the manual sampling container.

[0014] Preferably, the sampling and storage flow path includes a dosing pipeline, one end of which is connected to the pipeline between the common port and the connection point f, and the other end extends into the dosing reagent bottle.

[0015] Preferably, the valve / pump assembly is a multi-way valve, a pump assembly, a valve assembly, or a combination thereof; more preferably, the valve / pump assembly is a three-way valve.

[0016] According to another aspect of this application, a sampling and storage device is provided, which includes a cabinet and a flow path panel, wherein the flow path panel is movably flipped and connected to the front of the cabinet, and the flipping connection point is located at the lower part of the flow path panel, wherein the sampling and storage flow path is assembled on the flow path panel and / or disposed in the cabinet.

[0017] Preferably, the sampling and storage device includes at least one of the following: a control system, a display screen, a sampling and storage module, a liquid mixing module, an external interface, a power interface, and a power switch.

[0018] The control system is mounted on the flow surface plate.

[0019] The display screen is fixedly or flip-mounted in front of the flow path panel.

[0020] The sampling and storage module is either fixedly installed or slidably installed inside the cabinet via guide rails.

[0021] The liquid storage and mixing module is housed within the cabinet and located behind the flow path panel.

[0022] The cabinet door is flip-open or detachably connected to the front, back, or top of the cabinet body (30).

[0023] The external interface, power interface, and power switch are located on the upper part of the back or side of the cabinet.

[0024] According to the technical solution of this application, the flow direction of the liquid is controlled by a conduit, which enables water collection, sample supply, and emptying with fewer components, reducing the space occupied by the sampling and storage device. Moreover, through the reverse control of the actuator, the liquid can flow in reverse, allowing the liquid in the sampling and storage device to be emptied. In addition, this device is reasonably designed, compact in structure, and small in size.

[0025] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application, and the illustrative embodiments and descriptions thereof are used to explain this application. In the drawings:

[0027] Figure 1 This is a flow diagram of the first implementation method of the sampling and storage flow path;

[0028] Figure 2 This is a flow diagram of the second implementation method of the sampling and storage flow path;

[0029] Figure 3 This is a flow diagram of the third implementation method of the sampling and storage flow path;

[0030] Figure 4 This is an exterior view of the sampling and storage device.

[0031] Figure 5 This is an external view of the sampling and storage device in the open state. Detailed Implementation

[0032] The technical solution of this application will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] In this invention, unless otherwise stated, directional terms such as "up," "down," "left," "right," "front," and "back" are defined under normal operating conditions of the instruments and equipment of this invention.

[0034] like Figure 1 As shown, a sampling and storage device is proposed, which includes a distribution and diversion system, a sampling pipeline Laf, and an emptying pipeline Ldk.

[0035] The distribution and diversion system has a flow path combination of at least one common port g and n distribution ports (h1, h2, h3...hn), wherein the common port g may selectively conduct one of the distribution ports or none of them may be conducted. The distribution ports (h1, h2, h3...hn) are connected to liquid or air through diversion pipes Lhp, and n is a natural number greater than or equal to 2.

[0036] To further explain, the flow distribution system includes pump groups or valve groups or combinations thereof, to form a flow path combination of at least one common port g and n distribution ports (h1, h2, h3...hn). Examples include multi-channel rotary switching valves, valve groups consisting of n shut-off valves, three-way valves, pinch valves, etc., connected to the same common port g, and other valve groups composed of multiple shut-off valves and multiple multi-channel switching valves.

[0037] The sampling pipeline Laf is equipped with a first driver B1, which extends from the sampling inlet a to the connection point f.

[0038] A first valve / pump group Fd is provided at connection point d in the sampling pipeline Laf. The first distribution port 1 and the main port 0 of the first valve / pump group Fd are respectively connected to the first driver B1 and the common port g. The drain pipeline Ldk extends from the second distribution port 2 of the first valve / pump group Fd to the sample outlet k. A second driver B2 is provided in the sampling pipeline Ldf or the drain pipeline Ldk between connection point d and connection point f.

[0039] Among them, connection point f is connected to the distribution and diversion system 10 through connection pipeline Lfg.

[0040] To further explain, the valve / pump assembly is a multi-way valve, a pump assembly, a valve assembly, or a combination thereof. Preferably, the valve / pump assembly is a three-way valve whose main port 0 can be selectively connected to either the distribution port (1, 2).

[0041] To further explain, the actuator can be a peristaltic pump, which is a device or combination of devices that can drive liquids in both directions (sometimes only used for its function of driving in a certain direction) and can shut off the pipeline when stationary. Simple control of liquid flow direction via the actuator can significantly reduce the cost of sampling and storage devices.

[0042] The workflow when the flow path is in the sample retention state is as follows: the first driver B1 rotates counterclockwise, the second driver B2 rotates clockwise, the total port 0 of the first valve / pump group Fd is connected to the first distribution port 1, and the water sample enters the distribution and diversion system through the sampling pipeline Laf and the connecting pipeline Lfg in sequence, and finally enters the sample retention bottle.

[0043] When the flow path is in the emptied state, the first actuator B1 remains stationary, the second actuator B2 rotates counterclockwise, the main port 0 of the first valve / pump group Fd is connected to the second distribution port 2, the water sample retention bottle passes through the distribution and diversion system, the connecting pipeline Lfg and the sampling pipeline Ldf in sequence, and finally overflows from the emptied pipeline Ldk.

[0044] Existing sampling and storage devices mostly use stepper motors to drive the rotation of the flow distribution arm or its horizontal and vertical positioning motion to inject different liquid samples into different sample bottles or flow guide plates (and then inject liquid samples into the sample bottles through the outlets of the flow guide plate). Compared with existing methods, the "liquid distribution and flow guidance through flow path combination" proposed in this application guides and controls the flow direction of the liquid through conduits, which greatly saves the space occupied by the device. At the same time, the liquid flow direction is not easily affected by gravity or external forces, and can adapt to environments with shaking, bumping, and tilting.

[0045] exist Figure 2 In the sample collection and storage flow path shown, with Figure 1 Compared to the sample collection and storage flow path shown, the sample collection and storage flow path includes a liquid mixing module 20, a sample supply line Lfm, and a drug dosing line Fjy.

[0046] Liquid storage and mixing module 20: Liquid enters the liquid storage and mixing module 20 from connection point b. The lower part of the liquid storage and mixing module 20 is connected to connection point d. The liquid storage and mixing module 20 includes at least one mixing tank. Preferably, a ball valve is installed at the bottom of the mixing tank, which is connected to an air / waste liquid outlet. When the ball valve is open, the water sample is discharged from the air / waste liquid outlet, realizing automatic drainage and convenient use. An overflow port is provided at the top of the mixing tank. When the water level in the mixing tank is higher than the height of the overflow port, the water sample in the mixing tank will be discharged from the overflow port. A stirring unit is provided inside the mixing tank to prevent water sample sedimentation, which would affect the monitoring results.

[0047] Sample supply pipeline Lfm: A fifth valve / pump group Ff is installed at connection point f. The main port 0 and the first distribution port 1 of the fifth valve / pump group Ff are connected to the sampling pipeline Laf and the common port g, respectively. The sample supply pipeline Lfm extends from the second distribution port 2 of the fifth valve / pump group Ff to the sample outlet m.

[0048] Dosing line Fjy: One end of the dosing line Fjy is connected to the pipeline between the common port g and the connection point f, and the other end extends into the dosing reagent bottle. The dosing line 16 is equipped with a third actuator B3.

[0049] The workflow when the flow path is in the sample retention state is as follows: the first driver B1 rotates counterclockwise, the second driver B2 rotates clockwise, the total port 0 of the first valve / pump group Fd is connected to the first distribution port 1, the total port 0 of the fifth valve / pump group Ff is connected to the first distribution port 1, the water sample enters the distribution and diversion system through the sampling pipeline Laf and the connecting pipeline Lfg in sequence, and finally enters the sample retention bottle.

[0050] When the flow path is in the sampling state, the first driver B1 rotates counterclockwise, the second driver B2 rotates clockwise, the total port 0 of the first valve / pump group Fd is connected to the first distribution port 1, the total port 0 of the fifth valve / pump group Ff is connected to the first distribution port 2, the water sample passes through the sampling pipeline Laf and the sampling pipeline Lfm in sequence from the sampling inlet a, and finally the sample is taken out from the sampling outlet m.

[0051] When the flow path is in the dosing state, the third actuator B3 rotates clockwise, and the reagent from the dosing reagent bottle enters the jg section of the connecting pipe Lfg from the connection point j. After that, the third actuator B3 stops rotating, and the first actuator B1 and the second actuator B2 drive the liquid entering the connecting pipe Ljg to enter the dispensing port connected to the common port g in sequence through the common port g. Then, the reagent is guided to the sample bottle through the guide pipe Lhp.

[0052] When the flow path is in the emptied state, the first actuator B1 remains stationary, the second actuator B2 rotates counterclockwise, the total port 0 of the first valve / pump group Fd is connected to the second distribution port 2, the total port 0 of the fifth valve / pump group Ff is connected to the first distribution port 1, the water sample retention bottle passes through the distribution and diversion system, the connecting pipeline Lfg and the sampling pipeline Ldf in sequence, and finally overflows from the emptied pipeline Ldk.

[0053] exist Figure 3 In the sample collection and storage flow path shown, with Figure 2 Compared to the sampling and storage flow path shown, the sampling and storage flow path includes two mixing tanks, a reflux line, an instantaneous sampling flow path (Lim), and a manual sampling line (Les).

[0054] Two mixing tanks: The main port 0 of the second valve / pump group Fb is connected to connection point b. Liquid enters mixing tank A from the first distribution port 1 of the second valve / pump group Fb. The lower part of mixing tank A is connected to the first distribution port 1 of the third valve / pump group Fc. Liquid enters mixing tank B from the second distribution port 2 of the second valve / pump group Fb. The lower part of mixing tank B is connected to the second distribution port 2 of the third valve / pump group Fc. The main port 0 of the third valve / pump group Fc is connected to the first distribution port 1 of the first valve / pump group Fd. Water samples first enter mixing tank A. After mixing tank A reaches the liquid level and while waiting for analysis results, sampling is simultaneously performed in mixing tank B to achieve continuous and uninterrupted sampling.

[0055] Return line: Liquid in the sample supply line flows from the sample outlet m through the analyzer to the sample outlet n. One end of the return line is connected to the sample outlet n, and the other end is connected to the pipeline between the first actuator B1 and the first valve / pump group Fd. This returns the water sample to the mixing tank or the pipeline between the first actuator B1 and the first valve / pump group Fd, preventing water waste, reducing wastewater generation, and improving the user experience.

[0056] Instantaneous sampling flow path Lim: A fourth valve / pump group Fi is installed at the connection point i between sampling pipelines Lab. The main port 0 and the first distribution port 1 of the fourth valve / pump group Fi are connected to sampling pipelines Lai and Lib, respectively. The instantaneous sampling flow path Lim extends from the second distribution port 2 of the fourth valve / pump group Fi to the sample outlet m. The setting of the instantaneous sampling flow path Lim enables the sampling and storage device to collect instantaneous water samples, allowing for more real-time understanding of the water quality changes at the sampling point.

[0057] Manual sampling tubing Les: A sixth valve / pump assembly Fe is installed at connection point e on sampling tubing Ldf. The main port 0 and the first distribution port 1 of the sixth valve / pump assembly Fe are connected to sampling tubing Lae and sampling tubing Lef, respectively. Manual sampling tubing Les extends from the second distribution port 2 of the fifth valve / pump assembly Ff into the manual sampling container. The manual sampling tubing facilitates manual sample collection by users, improving the user experience.

[0058] The workflow when the flow path is in the sample retention state is as follows: the first actuator B1 rotates counterclockwise, the second actuator B2 rotates clockwise, the fourth valve / pump group Fi's main port 0 is connected to the first distribution port 1, the main ports 0 of the second valve / pump group Fb and the third valve / pump group Fc are both connected to the mixing tank A (or mixing tank B), the main port 0 of the first valve / pump group Fd is connected to the first distribution port 1, the main port 0 of the sixth valve / pump group Fe is connected to the first distribution port 1, and the main port 0 of the fifth valve / pump group Ff is connected to the first distribution port 1. The water sample enters the mixing tank A (or mixing tank B) through the sampling inlet a via the sampling pipeline, then flows out from the bottom of the mixing tank A (or mixing tank B), and then sequentially enters the distribution and diversion system through the sampling pipeline Lcf and the connecting pipeline Lfg, and finally enters the sample retention bottle.

[0059] The workflow when the flow path is in the sample supply state is as follows: the first driver B1 rotates counterclockwise, the second driver B2 rotates clockwise, the fourth valve / pump group Fi's total port 0 is connected to the first distribution port 1, the total ports 0 of the second valve / pump group Fb and the third valve / pump group Fc are both connected to the mixing tank A (or mixing tank B), the total port 0 of the first valve / pump group Fd is connected to the first distribution port 1, the total port 0 of the sixth valve / pump group Fe is connected to the first distribution port 1, the total port 0 of the fifth valve / pump group Ff is connected to the first distribution port 2, the water sample passes through the sampling pipeline Laf and the sample supply pipeline Lfm in sequence from the sampling inlet a, and finally the sample is taken out from the sample supply outlet m.

[0060] The workflow when the flow path is in the water sample reflux state is similar to that when the flow path is in the sample supply state, so it will not be described in detail here. The liquid in the sample supply pipeline Lfm flows from the sample supply outlet m through the analyzer to the instrument sample outlet n and finally enters the mixing tank or the pipeline between the first driver B1 and the first valve / pump group Fd.

[0061] The workflow when the flow path is in the water sample drain state is as follows: the first actuator B1 is stationary, the second actuator B2 rotates counterclockwise, the first valve / pump group Fd main port 0 is connected to the second distribution port 2, the sixth valve / pump group Fe main port 0 is connected to the first distribution port 1, the fifth valve / pump group Ff main port 0 is connected to the first distribution port 1, the water sample retention bottle passes through the distribution and diversion system, the connecting pipeline Lfg and the sampling pipeline Ldf in sequence, and finally overflows from the drain pipeline Ldk.

[0062] The workflow when the flow path is in manual sampling mode is as follows: the first actuator B1 rotates counterclockwise, the second actuator B2 rotates clockwise, the fourth valve / pump group Fi's main port 0 is connected to the first distribution port 1, the main ports 0 of the second valve / pump group Fb and the third valve / pump group Fc are both connected to the mixing tank A (or mixing tank B), the main port 0 of the first valve / pump group Fd is connected to the first distribution port 1, the main port 0 of the sixth valve / pump group Fe is connected to the first distribution port 2, and the water sample self-sampling inlet a passes through the sampling pipeline Lae and the connecting pipeline Lfg in sequence, and finally enters the manual sampling container.

[0063] The workflow when the flow path is in the instantaneous sampling state is as follows: the first driver B1 rotates counterclockwise, the fourth valve / pump group Fi total port 0 is connected to the first distribution port 2, the water sample passes through the sampling pipeline Lai and the instantaneous sampling pipeline Lim in sequence from the sampling inlet a, and finally the sample is taken out from the sample outlet m.

[0064] like Figure 4 and 5 As shown, this application proposes a sampling and storage device, which includes a cabinet 30 and a flow path panel 34. The flow path panel 34 is movably flipped and connected to the front of the cabinet 30, and the flip connection point is located at the lower part of the flow path panel 34. The sampling and storage flow path is assembled on the flow path panel 34 and / or disposed inside the cabinet 30.

[0065] On the one hand, the flow path panel 34 can organize the pipeline, making the interior of the sampling and storage device neat and aesthetically pleasing. On the other hand, when the sampling and storage device needs maintenance, rotating the flow path panel 34 to the flip position, that is, with the front side of the flow path panel 34 facing diagonally downward or downward, exposes the back side of the flow path panel 34. The operator can then maintain the components installed on the back of the flow path panel 34 from the front, taking into account both left-handed and right-handed operators, making maintenance convenient.

[0066] In addition, the sampling and storage device includes at least one of the following: control system 31, display screen 32, sampling and storage module 33, liquid mixing module 20, external interface, power interface, and power switch.

[0067] The control system is located on the flow path panel 34, adjacent to the flow path devices, saving circuit wiring.

[0068] The display screen 32 is fixedly or flipped to be mounted on the front of the flow path panel 34, making the sampling and storage device compact and small in size.

[0069] The sampling and storage module 33 is fixedly installed or slidably installed inside the cabinet 30 via guide rails, making it convenient for operators to take out or replace the sample bottles.

[0070] The liquid storage and mixing module 20 is located inside the cabinet 30 and behind the flow path panel 34.

[0071] The cabinet door is flip-connected or detachably connected to the front, back or top of the cabinet body (30).

[0072] External interfaces, power interfaces, and power switches are located on the upper part of the back or side of the cabinet 30. This arrangement facilitates the operator's plugging and unplugging of interfaces without adding extra wiring.

[0073] In summary, based on the technical solution of this application, the sampling and storage device and sampling flow path provided by this invention have the following advantages compared with the prior art:

[0074] 1. This sampling and storage device uses multiple conduits to guide and control the flow of liquid, enabling flexible liquid distribution and sample retention with fewer components, while also reducing the space occupied by the sampling and storage device.

[0075] 2. By controlling the reverse flow of the driver, the liquid can flow in reverse, allowing the liquid in the sampling and storage path to be emptied.

[0076] 3. This device is reasonably designed, with a compact structure and small size.

[0077] 4. The flow path panel 34 can organize the pipeline, making the interior of the sampling and storage device neat and beautiful.

[0078] The preferred embodiments of this application have been described in detail above. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.

[0079] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

[0080] Furthermore, various different embodiments of this application can be combined in any way, as long as they do not violate the spirit of this application, they should also be regarded as the content disclosed by this invention.

Claims

1. A sampling and storage flow path, characterized in that, The sampling and storage flow path includes: A flow distribution system (10) having at least one common port (g) and a flow path combination of n distribution ports (h1, h2, h3...hn), wherein the common port (g) may selectively open one of the distribution ports or not open all of them, the distribution ports being connected to liquid or air via flow guide pipes (Lhp), where n is a natural number greater than or equal to 2; Sampling line one (Laf), which is equipped with a first actuator (B1), extends from the sampling inlet a to the connection point f; and The drain pipe (Ldk) is provided with a first valve / pump group (Fd) at connection point d in the sampling pipe one (Laf). The first distribution port (1) and the main port (0) of the first valve / pump group (Fd) are respectively connected to the first driver (B1) and the common port (g). The drain pipe (Ldk) extends from the second distribution port (2) of the first valve / pump group (Fd) to the sample outlet k. The sampling pipe two (Ldf) or the drain pipe (Ldk) between connection point d and connection point f is provided with a second driver (B2). The connection point f is connected to the distribution and diversion system (10) via a connecting pipe (Lfg); The sampling and storage flow path includes a sample supply pipeline (Lfm), and a fifth valve / pump group (Ff) is provided at the connection point f. The main port (0) and the first distribution port (1) of the fifth valve / pump group (Ff) are respectively connected to the sampling pipeline (Laf) and the common port (g). The sample supply pipeline (Lfm) extends from the second distribution port (2) of the fifth valve / pump group (Ff) to the sample outlet m. The sampling and storage flow path includes a return pipeline. The liquid in the sample supply pipeline flows from the sample supply outlet m through the analyzer for sampling by the analyzer, and then flows to the sample outlet n of the analyzer. One end of the return pipeline is connected to the sample outlet n of the analyzer, and the other end is connected to the pipeline between the first driver (B1) and the first valve / pump group (Fd). The sampling and storage flow path includes an instantaneous sampling flow path. A fourth valve / pump group (Fi) is provided at the connection point i between sampling pipeline three (Lab). The main port (0) and the first distribution port (1) of the fourth valve / pump group (Fi) are connected to sampling pipeline four (Lai) and sampling pipeline five (Lib) respectively. The instantaneous sampling flow path (Lim) extends from the second distribution port (2) of the fourth valve / pump group (Fi) to the sample outlet m. The sampling and storage flow path includes a liquid mixing module (20). Liquid enters the liquid mixing module (20) from the connection point b. The lower part of the liquid mixing module (20) is connected to the connection point d. The liquid mixing module (20) includes two mixing tanks. The main port (0) of the second valve / pump group (Fb) is connected to the connection point b. Liquid enters the mixing tank A from the first distribution port (1) of the second valve / pump group (Fb). The lower part of the mixing tank A is connected to the first distribution port (1) of the third valve / pump group (Fc). 1) The liquid enters the mixing tank B from the second distribution port (2) of the second valve / pump group (Fb). The lower part of the mixing tank B is connected to the second distribution port (2) of the third valve / pump group (Fc). The total port (0) of the third valve / pump group (Fc) is connected to the first distribution port (1) of the first valve / pump group (Fd). The water sample first enters the mixing tank A or tank B. When the mixing tank A or tank B reaches the liquid level and the analysis results are waiting, the other tank is sampled simultaneously to achieve continuous and uninterrupted sampling.

2. The sampling and storage flow path according to claim 1, characterized in that, The sampling and storage flow path includes a manual sampling pipeline (Les). A sixth valve / pump assembly (Fe) is provided at connection point e on sampling pipeline two (Ldf). The main port (0) and the first distribution port (1) of the sixth valve / pump assembly (Fe) are connected to sampling pipeline six (Lae) and sampling pipeline seven (Lef) respectively. The manual sampling pipeline (Les) extends from the second distribution port (2) of the fifth valve / pump assembly (Ff) into the manual sampling container.

3. The sampling and storage flow path according to claim 1, characterized in that, The sampling and storage flow path includes a dosing line (Fjy), one end of which is connected to the pipeline between the common port (g) and the connection point f, and the other end extends into the dosing reagent bottle.

4. The sampling and storage flow path according to any one of claims 1 to 3, characterized in that, A valve / pump assembly is a multi-way valve, a pump assembly, a valve assembly, or a combination thereof.

5. The sampling and storage flow path according to claim 4, characterized in that, The valve / pump assembly is a three-way valve.

6. A sampling and storage device, characterized in that, The sampling and storage device includes a cabinet (30) and a flow path panel (34). The flow path panel (34) is movably flipped and connected to the front of the cabinet (30), and the flip connection point is located at the lower part of the flow path panel (34). The sampling and storage flow path is assembled on the flow path panel (34) and / or disposed inside the cabinet (30). The sampling and storage flow path is the sampling and storage flow path described in any one of claims 1-3 and claim 5.

7. The sampling and storage device according to claim 6, characterized in that, The sampling and storage device includes at least one of the following: a control system (31), a display screen (32), a sampling and storage module (33), a liquid mixing module (20), a cabinet door, an external interface, a power interface, and a power switch. The control system (31) is mounted on the flow path panel (34). The display screen (32) is fixedly or flip-mounted in front of or on top of the flow path panel (34). The sampling and storage module (33) is fixedly installed or slidably installed in the cabinet (30) via guide rails. The liquid storage mixing module (20) is located inside the cabinet (30) and behind the flow path panel (34). The cabinet door is flip-open or detachably connected to the front, back, or top of the cabinet body (30), and The external interface, power interface and power switch are located on the upper part of the back or side of the cabinet (30).

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