Water quality analysis pretreatment device

Abstract

The utility model discloses a water quality analysis pretreatment device which comprises a plurality of sample introduction passages, a sampling cup and an emptying valve, the sampling cup is connected with the plurality of sample introduction passages, and the bottom of the sampling cup is connected with the emptying valve; a valve A and a valve B in the sample introduction passage are connected, the NO end and the NC end of the valve A are respectively connected with a standard solution and a sample, and the NO end and the NC end of the valve B are respectively connected with an air compressor and a peristaltic pump A; the other end of the air compressor is externally connected with air, the other end of the peristaltic pump A is connected with a sampling cup through a valve C, the valve C and the sampling cup are connected with a peristaltic pump B through a three-way joint, and the other end of the peristaltic pump B is externally connected with pure water; the plurality of sample introduction channels are used for alternately introducing samples. According to the utility model, different dilution ratios of samples can be met, the flexibility of analysis pretreatment is improved, continuous sample introduction is realized, and the test efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to water quality monitoring and analyzing technical field, concretely is a water quality analysis pretreatment device. BACKGROUND

[0002] In the water quality monitoring and analyzing technical field, in order to prevent the valve of analysis pretreatment device from being blocked, so the pretreatment device for online monitoring usually adopts intermittent sampling mode, can flush the external valve during non sampling time.But, the intermittent sampling mode can have time delay to actual data test, cannot quickly analyze and feed back the real-time situation of monitoring index.Meanwhile, for the sample of ultrahigh concentration far beyond the test range of instrument, diluting in the instrument interior can prolong the test time of single sample, and a large amount of pure water is consumed and a large amount of waste liquid is generated in the process, cannot satisfy the needs of low cost and environmental protection. UTILITY MODEL CONTENT

[0003] The utility model discloses a water quality analysis pretreatment device to dilute sample proportion flexibly, realizes continuous and uninterrupted sampling simultaneously.The utility model discloses the following technical scheme to realize the above-mentioned purpose:

[0004] The utility model discloses a water quality analysis pretreatment device, include: a plurality of sampling access and a sampling cup and emptying valve, sampling cup is connected with a plurality of sampling access, and the bottom of sampling cup is connected with emptying valve. The sampling access includes: three valves, two peristaltic pumps and a air compressor, the COM end of valve A and the COM end of valve B are connected, and the NO end and NC end of valve A are connected with standard solution and sample respectively, the NO end and NC end of valve B are connected with air compressor and peristaltic pump A respectively. The other end of air compressor is connected with air, the other end of peristaltic pump A is connected with sampling cup through valve C, and valve C is connected with peristaltic pump B through three -way joint, and the other end of peristaltic pump B is connected with pure water. The plurality of sampling access alternately samples.

[0005] Further, the other end of peristaltic pump A is connected with the COM end of valve C, the NC end of valve C is connected with peristaltic pump B and sampling cup through three -way joint, and waste liquid is discharged from NO end.

[0006] In other embodiments, the water quality analysis pretreatment device includes: two sampling access, divided into first sampling access and second sampling access, the second sampling access is connected with the first sampling access, shares air compressor A1, peristaltic pump A1, peristaltic pump B1 and valve C1 of the first sampling access.

[0007] Further, the COM end of the valve A2 and the COM end of the valve B2 in the second sample inlet path are connected, the NO end of the valve A2 is connected with air, the NC end is connected with sample, the NO end of the valve B2 is connected with the air compressor A1 of the first sample inlet path, and the NC end is connected with the path between the valve B1 and the peristaltic pump A1 of the first sample inlet path through a three-way joint.

[0008] Further, the COM end of the valve A1 and the COM end of the valve B1 in the first sample inlet path are connected, the NO end is connected with a standard solution, and the NC end is connected with sample; the NO end and the NC end of the valve B1 are connected with the peristaltic pump A1 and the air compressor A1 respectively.

[0009] Further, the other end of the peristaltic pump A1 of the first sample inlet path is connected with the COM end of the valve C1, the NC end of the valve C1 is connected with the peristaltic pump B1 and the sampling cup through a three-way joint, and waste liquid is discharged from the NO end.

[0010] Preferably, the valve is a two-position three-way valve.

[0011] After the above technical scheme is adopted, the utility model has the following effects:

[0012] 1. The utility model can meet different dilution ratios of sample, improve the flexibility of analysis pretreatment, set the first sample inlet path and the second sample inlet path, continuously sample through the alternate sampling and flushing of the first sample inlet path and the second sample inlet path, greatly improve the efficiency of testing, and reduce the consumption of pure water and the generation of waste liquid.

[0013] 2. The first sample inlet path and the second sample inlet path of the utility model are composed of a plurality of valves and peristaltic pumps, the number of devices is small, the overall structure is simple, the device is easy to maintain, and the device is convenient to transport and install, and meets the needs of analysis pretreatment in different environments. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the overall structure schematic view of the first embodiment of the utility model.

[0015] Figure 2 It is the overall structure schematic view of the second embodiment of the utility model.

[0016] Main component symbol:

[0017] 1: valve A, 11: valve A1, 12: valve A2, 2: valve B, 21: valve B1, 22: valve B2, 3: valve C, 31: valve C1, 4: peristaltic pump A, 41: peristaltic pump A1, 5: peristaltic pump B, 51: peristaltic pump B1, 6: air compressor, 61: air compressor A1, 7: sampling cup, 8: emptying valve. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] In the description of this utility model, it should be noted that the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] Example 1

[0021] like Figure 1 As shown, this utility model discloses a water quality analysis pretreatment device, including: several sample inlet channels, a sampling cup 7, and an empty valve 8. The sampling cup 7 is connected to several sample inlet channels, and the bottom of the sampling cup 7 is connected to the empty valve 8.

[0022] The sample injection pathway includes three valves, two peristaltic pumps, and an air compressor 6. The COM terminals of valve A1 and valve B2 are connected, and the NO and NC terminals of valve A1 are connected to the standard solution and the sample, respectively. The NO and NC terminals of valve B2 are connected to the air compressor 6 and the peristaltic pump A4, respectively.

[0023] The other end of the air compressor 6 is connected to air, and the other end of the peristaltic pump A 4 is connected to the sampling cup 7 through valve C 3. Valve C 3 and the sampling cup 7 are connected to the peristaltic pump B 5 through a three-way connector. The other end of the peristaltic pump B 5 is connected to pure water.

[0024] Several injection pathways are used for alternating injection.

[0025] The other end of the peristaltic pump A4 is connected to the COM end of valve C3. The NC end of valve C3 is connected to the peristaltic pump B5 and the sampling cup 7 via a tee connector, and the waste liquid is discharged from the NO end.

[0026] In this embodiment, the valve is a two-position three-way valve.

[0027] The dilution and injection procedure in this embodiment is as follows:

[0028] Dilution injection via the injection pathway: Valve A1 is open, peristaltic pump A4 runs, and the sample is extracted. When valve C3 is closed, the sample is discharged from the NO end of valve C3. When valve C3 is open, the sample can directly enter sampling cup 7. When dilution is required, peristaltic pump B5 draws pure water into sampling cup 7. The dilution ratio of the sample can be adjusted by intermittently opening valve C3 and controlling the rate at which pure water is introduced into peristaltic pump B5.

[0029] Wherein, the sampling of several sampling channels is taken in rotation, and the back flushing is performed on another sampling channel while sampling in a certain sampling channel. The flushing process is as follows:

[0030] Valve A1 and valve B2 are opened, and the air pump A6 pumps air to back flush the sampling channel to blow out the impurities blocked in the sampling channel.

[0031] In addition, the process of diluting the standard solution sample is as follows:

[0032] Valve A1 and valve B2 are opened, and the peristaltic pump A4 is operated to extract the standard solution. In the state that valve C3 is not opened, the standard solution is discharged from the NO end of valve C3, and when valve C3 is opened, the standard solution can directly enter the sampling cup 7. When dilution is needed, the peristaltic pump B5 extracts pure water into the sampling cup 7, and the dilution ratio of the sample can be adjusted by intermittently opening valve C3 and controlling the speed of the peristaltic pump B5 to introduce pure water.

[0033] At the same time, the mixing of the sample in the sampling cup 7 can be performed by opening the peristaltic pump A4 and valve C3 to mix the sample in the sampling cup 7 by air.

[0034] Example Two

[0035] The difference between this embodiment and example one is that the water quality analysis pretreatment device comprises two sampling channels, which are a first sampling channel and a second sampling channel.

[0036] As shown in Figure 2 In this embodiment, the second sampling channel is connected to the first sampling channel, and shares the air pump A161, the peristaltic pump A141, the peristaltic pump B151 and valve C131 of the first sampling channel.

[0037] The COM end of valve A212 and the COM end of valve B222 in the second sampling channel are connected, the NO end of valve A212 is connected with air outside, the NC end is connected with a sample outside, the NO end of valve B222 is connected with the air pump A161 of the first sampling channel, and the NC end is connected in the channel between valve B121 and peristaltic pump A141 of the first channel through a three-way joint.

[0038] The COM end of valve A111 and the COM end of valve B121 of the first sampling channel are connected, the NO end and the NC end are connected with a standard solution and a sample outside respectively; the NO end and the NC end of valve B121 are connected with peristaltic pump A141 and air pump A161 respectively.

[0039] In addition, in this embodiment, the other end of peristaltic pump A141 of the first sampling channel is connected with the COM end of valve C131, the NC end of valve C131 is connected with peristaltic pump B151 and sampling cup 7 through a three-way joint, and waste liquid is discharged from the NO end.

[0040] The dilution sampling process of the embodiment is as follows:

[0041] 1. Dilution sampling of the first sampling path: valve A111 is opened, and peristaltic pump A141 is operated to draw sample. When valve C131 is not opened, the sample is discharged from the NO end of valve C131, and when valve C131 is opened, the sample can directly enter sampling cup 7. When dilution is needed, peristaltic pump B151 draws pure water into sampling cup 7, and the dilution ratio of the sample can be adjusted by intermittently opening valve C131 and controlling the speed of pure water entering sampling cup 7.

[0042] 2. Dilution sampling of the second sampling path: valves A212 and B222 are opened, and peristaltic pump A141 is operated to draw sample. When valve C131 is not opened, the sample is discharged from the NO end of valve C131, and when valve C131 is opened, the sample can directly enter sampling cup 7. When dilution is needed, peristaltic pump B151 draws pure water into sampling cup 7, and the dilution ratio of the sample can be adjusted by intermittently opening valve C131 and controlling the speed of pure water entering sampling cup 7.

[0043] Among them, the sampling of the two sampling paths adopts a rotation system, and when the first sampling path is sampling, the second sampling path is backflushed; when the second sampling path is sampling, the first sampling path is backflushed. The flushing process is as follows:

[0044] 1. Backflushing of the first sampling path: valves A212 and B222 are opened, and valve A111 is opened, and air pump A161 pumps air to backflush the first sampling path to blow out impurities blocked in the first sampling path.

[0045] 2. Backflushing of the second sampling path: valve A111 is closed, and air pump A161 pumps air to backflush the second sampling path to blow out impurities blocked in the second sampling path.

[0046] In addition, the process of diluting the standard solution is as follows:

[0047] Valves A111 and B121 are opened, and peristaltic pump A141 is operated to draw the standard solution. When valve C131 is not opened, the standard solution is discharged from the NO end of valve C131, and when valve C131 is opened, the standard solution can directly enter sampling cup 7. When dilution is needed, peristaltic pump B151 draws pure water into sampling cup 7, and the dilution ratio of the sample can be adjusted by intermittently opening valve C131 and controlling the speed of pure water entering sampling cup 7.

[0048] At the same time, the mixing of the sample in sampling cup 7 can be achieved by opening peristaltic pump A141 and valve C131 to mix the sample in sampling cup 7 by air.

[0049] The above merely describes a preferred embodiment of the present application, and any changes or replacements within the technical scope of the present application conceived by any person skilled in the art should be encompassed in the protection scope of the present application.

Claims

1. A water quality analysis pretreatment device, characterized in that, It comprises: a plurality of sample inlet channels and a sampling cup (7) and a emptying valve (8), the sampling cup (7) is connected with a plurality of sample inlet channels, and the bottom of the sampling cup (7) is connected with the emptying valve (8); The sample inlet channel comprises: three valves, two peristaltic pumps and an air compressor (6), wherein the COM end of valve A (1) and the COM end of valve B (2) are connected, and the NO end and the NC end of valve A (1) are respectively connected with standard solution and sample, the NO end and the NC end of valve B (2) are respectively connected with air compressor (6) and peristaltic pump A (4); The other end of the air compressor (6) is connected with air, the other end of the peristaltic pump A (4) is connected with the sampling cup (7) through valve C (3), and the valve C (3) and the sampling cup (7) are connected with the peristaltic pump B (5) through a three-way joint, and the other end of the peristaltic pump B (5) is connected with pure water; The plurality of sample inlet channels are alternately sampled.

2. The water quality analysis pretreatment device according to claim 1, characterized by: The other end of the peristaltic pump A (4) is connected with the COM end of the valve C (3), the NC end of the valve C (3) is connected with the peristaltic pump B (5) and the sampling cup (7) through a three-way joint, and waste liquid is discharged from the NO end.

3. The water quality analysis pretreatment apparatus according to claim 1, wherein It comprises: two sample inlet channels, which are divided into a first sample inlet channel and a second sample inlet channel, the second sample inlet channel is connected with the first sample inlet channel, and shares the air compressor A1 (61), the peristaltic pump A1 (41), the peristaltic pump B1 (51) and the valve C1 (31) of the first sample inlet channel.

4. A water quality analysis pretreatment apparatus as claimed in claim 3, characterized in that: The COM end of valve A2 (12) and the COM end of valve B2 (22) in the second sample inlet channel are connected, and the NO end of valve A2 (12) is connected with air, and the NC end is connected with sample, the NO end of valve B2 (22) is connected with the air compressor A1 (61) of the first sample inlet channel, and the NC end is connected with the passage between valve B1 (21) and peristaltic pump A1 (41) of the first channel through a three-way joint.

5. A water quality analysis pretreatment apparatus as claimed in claim 4, characterized in that: The COM end of valve A1 (11) and the COM end of valve B1 (21) of the first sample inlet channel are connected, the NO end and the NC end are respectively connected with standard solution and sample; the NO end and the NC end of valve B1 (21) are respectively connected with the peristaltic pump A1 (41) and the air compressor A1 (61).

6. A water quality analysis pretreatment apparatus as claimed in claim 5, characterized in that: The other end of the peristaltic pump A1 (41) of the first sample inlet channel is connected with the COM end of the valve C1 (31), the NC end of the valve C1 (31) is connected with the peristaltic pump B1 (51) and the sampling cup (7) through a three-way joint, and waste liquid is discharged from the NO end.

7. A water quality analysis pre-treatment device according to any one of claims 1 to 6, characterized in that: The valve is a two-position three-way valve.

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