Multi-stage pretreatment device for analyzing water sample

Abstract

The utility model provides a multistage pretreatment device for analyzing a water sample, which belongs to the technical field of water sample pretreatment and comprises a water inlet pipe, a water outlet pipeline, at least two filter chambers and sample cups, and the at least two filter chambers are connected with the water inlet pipeline and the water outlet pipeline and can be switched in series-parallel connection. When the at least two filtering chambers are connected in parallel and work simultaneously, the treatment capacity of sample water can be increased; when the at least two filtering chambers are connected in parallel and only one filtering chamber is opened to work, the filtering chamber with the corresponding filtering precision can be selectively opened according to the actual requirement on the filtering precision; when the at least two filtering chambers are connected in series to work, multiple filtering can be realized, and the filtering precision is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to water sample pretreatment technical field, more specifically, relate to a kind of multistage pretreatment device for analyzing water sample. BACKGROUND

[0002] In the rapid development of industrialization and intelligentization in China, the monitoring data of water quality is crucial, and the widespread application of online monitoring instruments will be necessary to effectively remove floating objects, sand and sediments to ensure normal measurement of the entire online instrument.

[0003] The prior art front-end filtering device has the following disadvantages: (1) the device has only a single filtering system, which cannot be used alternately, has a short service life and needs regular maintenance, which cannot guarantee the continuity of the water output; (2) the device has a single function and cannot meet the filtering needs of different filtering levels; (3) the device is inconvenient to clean and has no aeration or other cleaning design. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a multistage pretreatment device for analyzing water sample, which solves the problem that the existing water sample pretreatment device cannot meet the filtering needs of different filtering levels.

[0005] To achieve the above-mentioned purpose, the utility model provides a multistage pretreatment device for analyzing water sample, which comprises:

[0006] a water inlet pipeline, which is provided with a sample pump;

[0007] a water outlet pipeline, which is provided with a water sample transfer pump;

[0008] at least two filtering chambers, which are connected to the water inlet pipeline and the water outlet pipeline and can be switched in series or in parallel;

[0009] a sample cup, which is connected to the water outlet pipeline.

[0010] Optionally, the filtering chamber is provided with a chamber water sample interface, at least one filtering component is arranged in the filtering chamber, the filtering component is provided with a filtering component water sample interface, the chamber water sample interface is connected to the water inlet pipeline, and the filtering component water sample interface is connected to the water outlet pipeline.

[0011] Optionally, the filtering component comprises a pair of filtering membranes, a sandwich space for containing water sample is formed between the pair of filtering membranes, and the top of the sandwich space is provided with the filtering component water sample interface.

[0012] Optionally, the filter chamber is provided with three, and the three chamber water sample interfaces are respectively connected to the water inlet pipeline, and the three filter component water sample interfaces are respectively connected to the water outlet pipeline.

[0013] Optionally, an aeration pipeline is further included.

[0014] The bottom of the interlayer space is provided with an aeration component, and the aeration component is provided with an aeration interface and a plurality of aeration cleaning holes, and the three aeration interfaces are respectively connected to the aeration pipeline through aeration valves.

[0015] Optionally, a chamber water sample valve is arranged between each of the chamber water sample interfaces and the water inlet pipeline.

[0016] A filter component water sample valve is arranged between each of the filter component interfaces and the water inlet pipeline.

[0017] Optionally, a first switching valve is arranged on the water inlet pipeline between the chamber water sample interface located upstream and the chamber water sample interface located in the middle reaches.

[0018] A second switching valve is arranged on the water outlet pipeline between the filter component interface located downstream and the filter component interface located in the middle reaches.

[0019] Optionally, two filter components are arranged in each of the filter chambers, the filter component water sample valve is a three-way water valve, and the two filter component water sample interfaces in each of the filter chambers are connected to the water outlet pipeline through the corresponding filter component water sample valve.

[0020] Optionally, the multi-stage pretreatment device for analyzing a water sample further includes:

[0021] A pressure sensor is arranged on the water outlet pipeline between the filter component interface located downstream and the sample cup.

[0022] A controller is electrically connected to the sample inlet pump, the water sample transfer pump, the pressure sensor, the three chamber water sample valves, the three filter component valves, the three aeration valves, the first switching valve, and the second switching valve.

[0023] Optionally, each of the filter chambers is provided with a chamber discharge port, and the sample cup is provided with a sample cup discharge port.

[0024] The chamber discharge port and the sample cup discharge port are connected to a discharge pipeline and are respectively provided with a discharge valve.

[0025] The utility model discloses beneficial effect lies in: provide a kind of multistage pretreatment device for analyzing water sample, comprising: water inlet pipe, road outlet water pipe, at least two filter chambers and sample cup, at least two filter chambers are connected with water inlet pipe and outlet water pipe and can be switched over in series and parallel connection. At least two filter chambers are connected in parallel and work simultaneously, can increase the processing capacity of sample water;At least two filter chambers are connected in parallel and only open one filter chamber work, can be selected according to the actual demand of filtering precision to open corresponding filtering precision filter chamber;At least two filter chambers are connected in series and work, can realize multiple filtration, improve filtering precision.

[0026] Other features and advantages of the utility model will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above and other objects, features and advantages of the utility model will become more apparent from the following detailed description of exemplary embodiments of the utility model, taken in conjunction with the accompanying drawings, in which like reference characters typically identify corresponding components throughout the typical embodiments of the utility model.

[0028] Fig. 1 A schematic structural diagram of multistage pretreatment device for analyzing water sample according to one embodiment of the utility model is shown.

[0029] Fig. 2 A schematic structural diagram of filter component according to one embodiment of the utility model is shown.

[0030] Fig. 3 A schematic structural diagram of filter component according to one embodiment of the utility model is shown.

[0031] BRIEF DESCRIPTION OF DRAWINGS

[0032] 1, water inlet pipe; 11, sample inlet pump; 12, first switch valve;

[0033] 2, outlet water pipe; 21, water sample transfer pump; 22, second switch valve; 23, pressure sensor;

[0034] 3, aeration pipe;

[0035] 4, sample cup; 41, sample cup discharge port; 42, fourth discharge valve;

[0036] 5, first filter chamber; 51, first chamber water sample interface; 52, first chamber water sample valve; 53, first chamber discharge port; 54, first discharge valve; 55, first filter component, 56, first filter component water sample interface; 57, first filter component water sample valve; 58, first aeration interface; 59, first aeration valve;

[0037] 6, second filter chamber; 61, second chamber water sample interface; 62, second chamber water sample valve; 63, second chamber drain; 64, second drain valve; 65, second filter component; 66, second filter component water sample interface; 67, second filter component water sample valve; 68, second aeration interface; 69, second aeration valve;

[0038] 7, third filter chamber; 71, third chamber water sample interface; 72, third chamber water sample valve; 73, third chamber drain; 74, third drain valve; 75, third filter component; 76, third filter component water sample interface; 77, third filter component water sample valve; 78, third aeration interface; 79, third aeration valve;

[0039] 8, controller;

[0040] 91, filter membrane; 92, interlayer space; 93, aeration component; 94, aeration interface; 95, filter component water sample interface;

[0041] 10, drain line. DETAILED DESCRIPTION

[0042] Preferred embodiments of the present application will be described in more detail below. Although the following describes preferred embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application is more thoroughly and completely conveyed to those skilled in the art, and so that the scope of the present application is fully conveyed to those skilled in the art.

[0043] As shown in FIG. 1, the present embodiment provides a multi-stage pretreatment device for analyzing a water sample, which includes: Figs. 1-3

[0044] Inlet water line 1, which is provided with a sample inlet pump 11;

[0045] Outlet water line 2, which is provided with a water sample transfer pump 21;

[0046] At least two filter chambers, each of which is connected to the inlet water line 1 and the outlet water line 2, and which can be switched between series and parallel connection;

[0047] Sample cup 4, which is connected to the downstream end of the outlet water line 2.

[0048] ​Specifically, the water inlet pipeline 1 is used to provide water sample to the filter chamber, the sample pump 11 provides power for the water sample in the water inlet pipeline 1, and the filter chamber can filter the water sample. When at least two filter chambers work in parallel and at the same time, the processing capacity of the sample water can be increased; when at least two filter chambers work in parallel and only one filter chamber is turned on, different filter chambers can be set to different filtering accuracies, and the filter chamber with the corresponding filtering accuracy can be selected according to the actual demand for filtering accuracy; when at least two filter chambers work in series, multiple filtering can be realized, and the filtering accuracy can be improved.

[0049] Optionally, the filter chamber is provided with a chamber water sample interface, at least one filter component is arranged in the filter chamber, the filter component is provided with a filter component water sample interface 95, the chamber water sample interface is connected with the water inlet pipeline 1, and the filter component water sample interface 95 is connected with the water outlet pipeline 2.

[0050] Specifically, the filter chamber can work in two directions. When working in the forward direction, the water sample flows into the filter chamber from the chamber water sample interface and flows out from the filter component water sample interface 95 after being filtered by the filter component. When working in the reverse direction, the water sample flows into the filter component from the filter component water sample interface 95, enters the filter chamber after being filtered by the filter component, and then flows out from the chamber water sample interface. Different filter components with different filtering accuracies can be arranged in different filter chambers, so that the filtering accuracy can be selected and controlled.

[0051] In this embodiment, the filter component includes a pair of filter membranes 91, and a sandwich space 92 for containing water sample is formed between the pair of filter membranes 91. The top of the sandwich space 92 is provided with a filter component water sample interface 95.

[0052] Specifically, the filter component can work in two directions. When working in the forward direction, the water sample to be filtered flows into the filter chamber from the chamber water sample interface, the water sample to be filtered in the filter chamber is filtered by penetrating into the sandwich space 92 through the filter membrane 91, and the water sample in the sandwich space 92 is discharged from the filter component water sample interface 95. When working in the reverse direction, the water sample to be filtered flows into the sandwich space 92 from the filter component water sample interface 95, the water sample to be filtered in the sandwich space 92 penetrates into the filter chamber through the filter membrane 91, and the water sample in the filter chamber flows out from the chamber water sample interface.

[0053] Optionally, three filter chambers are arranged, and the three chamber water sample interfaces are connected with the water inlet pipeline 1, and the three filter component water sample interfaces 95 are connected with the water outlet pipeline 2.

[0054] In this embodiment, the three filtering chambers are respectively a first filtering chamber 5, a second filtering chamber 6 and a third filtering chamber 7; the first filtering chamber 5 is provided with a first chamber water sample interface 51, the first filtering chamber 5 is internally provided with a first filtering component 55, and the first filtering component 55 is provided with a first filtering component water sample interface 56; the second filtering chamber 6 is provided with a second chamber water sample interface 61, the second filtering chamber 6 is internally provided with a second filtering component 65, and the second filtering component 65 is provided with a second filtering component water sample interface 66; the third filtering chamber 7 is provided with a third chamber water sample interface 71, the third filtering chamber 7 is internally provided with a third filtering component 75, and the third filtering component 75 is provided with a third filtering component water sample interface 76; the first chamber water sample interface 51, the second chamber water sample interface 61 and the third chamber water sample interface 71 are connected in parallel to the water inlet pipeline 1 from upstream to downstream of the water inlet pipeline 1; and the first filtering component water sample interface 56, the second filtering component water sample interface 66 and the third filtering component water sample interface 76 are connected in parallel to the water outlet pipeline 2 from upstream to downstream of the water outlet pipeline 2. In this way, the three filtering chambers are connected in parallel and can work simultaneously, so that the water sample processing capacity can be improved.

[0055] Optionally, the water inlet pipeline 1 is further connected with an aeration pipeline 3;

[0056] The bottom of the interlayer space 92 is provided with an aeration component 93, the aeration component 93 is provided with an aeration interface 94 and a plurality of aeration cleaning holes, and the three aeration interfaces 94 are respectively connected with the aeration pipeline 3 through aeration valves.

[0057] In this embodiment, the first filtering component 55 is provided with a first aeration interface 58; the second filtering component 65 is provided with a second aeration interface 68; the third filtering component 75 is provided with a third aeration interface 78; the first aeration interface 58, the second aeration interface 68 and the third aeration interface 78 are connected in parallel to the aeration pipeline 3; a first aeration valve 59 is arranged between the first aeration interface 58 and the aeration pipeline 3; a second aeration valve 69 is arranged between the second aeration interface 68 and the aeration pipeline 3; and a third aeration valve 79 is arranged between the third aeration interface 78 and the aeration pipeline 3.

[0058] Specifically, the aeration component 93 is used for cleaning the filtering component, the aeration pipeline 3 provides compressed air for the aeration component 93, the compressed air is sprayed into the filtering component through the aeration cleaning holes, and the filtering component is cleaned. The aeration valve is used for controlling the opening and closing of the aeration component 93.

[0059] Optionally, a chamber water sample valve is arranged between each chamber water sample interface and the water inlet pipeline 1;

[0060] A filtering component water sample valve is arranged between each filtering component interface and the water inlet pipeline 1.

[0061] In this embodiment, the first chamber water sample interface 51 and the water inlet pipeline 1 are provided with a first chamber water sample valve 52; the second chamber water sample interface 61 and the water inlet pipeline 1 are provided with a second chamber water sample valve 62; the third chamber water sample interface 71 and the water inlet pipeline 1 are provided with a third chamber water sample valve 72; the first filter component interface and the water inlet pipeline 1 are provided with a first filter component water sample valve 57; the second filter component interface 65 and the water inlet pipeline 1 are provided with a second filter component water sample valve 67; the third filter component interface 75 and the water inlet pipeline 1 are provided with a third filter component water sample valve 77.

[0062] Specifically, different filter chambers are arranged to have different filtering precision, and through the cooperation of the three chamber water sample valves and the three filter component water sample valves, the working filter chamber can be selected, and the filtering precision can be adjusted. For example, when the first filter chamber 5 is selected to work, the first chamber water sample valve 52 and the first filter component water sample valve 57 are opened, and the second chamber water sample valve 62, the second filter component water sample valve 67, the third chamber water sample valve 72 and the third filter component water sample valve 77 are closed.

[0063] Optionally, the water inlet pipeline 1 between the chamber water sample interface located upstream and the chamber water sample interface located in the middle stream is provided with a first switching valve 12.

[0064] The water outlet pipeline 2 between the filter component interface located downstream and the filter component interface located in the middle stream is provided with a second switching valve 22.

[0065] In this embodiment, the water inlet pipeline 1 between the first chamber water sample interface and the second chamber water sample interface is provided with a first switching valve 12.

[0066] The water outlet pipeline 2 between the second filter component interface 65 and the third filter component interface 75 is provided with a second switching valve 22.

[0067] Specifically, by controlling the opening and closing of the first switching valve 12 and the second switching valve 22, the series-parallel switching of the three filter chambers can be realized. When in parallel, the first switching valve 12 and the second switching valve 22 are opened. When in series, the first switching valve 12 and the second switching valve 22 are closed, the water sample enters the first filter chamber 5 from the first chamber water sample valve 52, flows out from the first filter component water sample valve 57, enters the second filter chamber 6 through the second filter component water sample valve 67, and then flows out from the second chamber water sample valve 62, enters the third filter chamber 7 through the third chamber water sample valve 72, and finally produces the filtered water sample through the third filter component water sample valve 77, thereby forming multi-stage filtration.

[0068] Optionally, two filter components are arranged in each filter chamber, the filter component water sample valve is a three-way water valve, and the two filter component water sample interfaces 95 in each filter chamber are connected to the water outlet pipeline 2 through the corresponding filter component water sample valve.

[0069] In this embodiment, the first filter chamber 5 is further provided with a fourth filter component, the fourth filter component is provided with a fourth filter component water sample interface and a fourth aeration interface, the first filter component water sample valve 57 is a three-way water valve, the fourth filter component water sample interface is connected to the first filter component water sample valve 57, the first aeration valve 59 is a three-way air valve, and the fourth aeration interface 94 is connected to the first aeration valve 59; the second filter chamber 6 is further provided with a fifth filter component, the fifth filter component is provided with a fifth filter component water sample interface and a fifth aeration interface, the second filter component water sample valve 67 is a three-way water valve, the fifth filter component water sample interface is connected to the second filter component water sample valve 67, the fifth aeration valve is a three-way air valve, and the fifth aeration interface is connected to the second aeration valve 69; the third filter chamber 7 is further provided with a sixth filter component, the sixth filter component is provided with a sixth filter component water sample interface and a sixth aeration interface, the third filter component water sample valve 77 is a three-way water valve, the sixth filter component water sample interface is connected to the third filter component water sample valve 77, the sixth aeration valve is a three-way air valve, and the sixth aeration interface is connected to the second aeration valve 69.

[0070] Specifically, the two filter components in each filter chamber can be controlled to work alternately and aerate and maintain by the three-way water valve and the three-way air valve, so as to prolong the service life of the filter components and reduce the maintenance workload.

[0071] Optionally, the multi-stage pretreatment device for analyzing water samples further comprises:

[0072] A pressure sensor 23 is arranged on the water outlet pipeline 2 between the downstream filter component interface and the sample cup 4;

[0073] A controller 8 is electrically connected with the sample injection pump 11, the water sample transfer pump 21, the pressure sensor 23, the three chamber water sample valves, the three filter component valves, the three aeration valves, the first switching valve 12, and the second switching valve 22.

[0074] In this embodiment, the pressure sensor 23 is arranged on the water outlet pipeline 2 between the third filter component 75 interface and the sample cup 4; and the controller 8 is electrically connected with the sample injection pump 11, the water sample transfer pump 21, the pressure sensor 23, the first chamber water sample valve, the second chamber water sample valve, the third chamber water sample valve, the first filter component 55 valve, the second filter component 65 valve, the third filter component 75 valve, the first aeration valve 59, the first aeration valve 59, and the first aeration valve 59.

[0075] Specifically, the pressure sensor 23 is used to detect the water pressure of the water outlet pipeline 2, and the controller 8 can determine the clogging state of the filter component according to the value of the pressure sensor 23 through a control algorithm, so as to realize intelligent aeration control. The controller 8 can also realize the switching of multiple working modes by controlling the opening and closing of the three chamber water sample valves, the three filter component valves, the first switching valve 12 and the second switching valve 22. When different filtering accuracy requirements are required for sample water treatment, the controller 8 controls the three filter chambers to work in parallel according to the control logic; when the sample water needs multiple filtering, the controller 8 controls the three filter chambers to work in series according to the control logic.

[0076] Optionally, each filter chamber is provided with a chamber discharge port, and the sample cup 4 is provided with a sample cup discharge port 41,

[0077] The three chamber discharge ports and the sample cup discharge port 41 are connected to the discharge pipeline 10 and are each provided with a discharge valve.

[0078] In this embodiment, the first filter chamber 5 is provided with a first chamber discharge port 53, the first chamber discharge port 53 is provided with a first discharge valve 54; the second filter chamber 6 is provided with a second chamber discharge port 63, the second chamber discharge port 63 is provided with a second discharge valve 64; the third filter chamber 7 is provided with a third chamber discharge port 73, the third chamber discharge port 73 is provided with a third discharge valve 74; the sample cup 4 is provided with a sample cup discharge port 41, the sample cup discharge port 41 is provided with a fourth discharge valve 42; the first chamber discharge port 53, the second chamber discharge port 63, the third chamber discharge port 73 and the sample cup discharge port 41 are connected in parallel to the discharge pipeline 10.

[0079] Specifically, after the water sample pretreatment is completed, the three chamber discharge ports and the sample cup discharge port 41 can be opened to drain the residual water.

[0080] The above has described various embodiments of the present application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A multi-stage pre-treatment device for analyzing a water sample, characterized by, It comprises: an inlet water pipeline provided with a sample pump; an outlet water pipeline provided with a water sample transfer pump; at least two filter chambers, each of which is connected to the inlet water pipeline and the outlet water pipeline, and can be switched in series or in parallel; a sample cup connected to the outlet water pipeline.

2. The multi-stage pretreatment device for analyzing water samples according to claim 1, wherein: the filter chamber is provided with a chamber water sample interface, and at least one filter component is arranged in the filter chamber, the filter component is provided with a filter component water sample interface, the chamber water sample interface is connected to the inlet water pipeline, and the filter component water sample interface is connected to the outlet water pipeline.

3. The multi-stage pretreatment device for analyzing water samples according to claim 2, wherein: the filter component comprises a pair of filter membranes, a sandwich space for containing water samples is formed between the pair of filter membranes, and the sandwich space is provided at the top with the filter component water sample interface.

4. The multi-stage pretreatment device for analyzing water samples according to claim 3, wherein: the filter chamber is provided with three chamber water sample interfaces, each of which is connected to the inlet water pipeline, and three filter component water sample interfaces, each of which is connected to the outlet water pipeline.

5. The multi-stage pretreatment device for analyzing water samples according to claim 4, further comprising an aeration pipeline, and wherein: the bottom of the sandwich space is provided with an aeration component, the aeration component is provided with an aeration interface and a plurality of aeration cleaning holes, and three aeration interfaces are connected to the aeration pipeline through aeration valves.

6. The multi-stage pretreatment device for analyzing water samples according to claim 5, wherein: each chamber water sample interface is provided with a chamber water sample valve between the chamber water sample interface and the inlet water pipeline; and each filter component interface is provided with a filter component water sample valve between the filter component interface and the inlet water pipeline.

7. The multi-stage pretreatment device for analyzing water samples according to claim 6, wherein: a first switching valve is arranged on the inlet water pipeline between the chamber water sample interface located upstream and the chamber water sample interface located in the middle stream; and a second switching valve is arranged on the outlet water pipeline between the filter component interface located downstream and the filter component interface located in the middle stream.

8. The multi-stage pretreatment device for analyzing water samples according to claim 7, wherein: each filter chamber is provided with two filter components, the filter component water sample valve is a three-way water valve, and the two filter component water sample interfaces in each filter chamber are connected to the outlet water pipeline through the corresponding filter component water sample valve. The device further comprises:

9. The multi-stage pre-treatment device for analyzing a water sample according to claim 8, wherein, a pressure sensor arranged on the outlet water pipeline between the filter component interface located downstream and the sample cup; and a controller electrically connected to the sample pump, the water sample transfer pump, the pressure sensor, the three chamber water sample valves, the three filter component valves, the three aeration valves, the first switching valve, and the second switching valve. ​ 10. The multi-stage pretreatment device for analyzing a water sample according to claim 3, wherein, each of the filter chambers is provided with a chamber drain, and the sample cup is provided with a sample cup drain; the chamber drains and the sample cup drain are connected to a drain line and are each provided with a drain valve.

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