Water quality detection device based on batch processing technology

Abstract

The utility model provides a water quality detection device based on a batch processing technology, which comprises a conveyor belt, a sample disc, a reagent adding unit, a heating reflux unit and a titration detection unit, and a sample cup is arranged on the sample disc; the sample plate is characterized in that N sample cups are arranged on each sample plate, and the number N meets the condition that i * B / b < = N < = (T3 + (-1) n.T4) / (T5-T1-T2); i is a positive integer, T1 is the time of adding a catalyst into a single sample by using the heating reflux unit, T2 is the time of adding a cleaning agent into the single sample by using the heating reflux unit, T3 is the heating reflux time, T4 is the cooling time, T5 is the titration detection time of the single sample, B is the length of the sample disc in the transmission direction, b is the diameter of the sample cup, and c is the diameter of the sample cup. N is an even number when the heating reflux unit is used for cooling, and n is an odd number when the titration detection unit is used for cooling. The device has the advantages of high efficiency and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to water quality detection, especially water quality detection device based on batch processing technology. BACKGROUND

[0002] At present, manual method is mostly used for heating reflux pretreatment and titration detection, which has low automation degree, high work load, and cannot guarantee the determination precision and meet the increasing detection demand.

[0003] In order to realize automatic detection, the following solutions are adopted in the prior art:

[0004] 1. Rotary table type. Patent CN111239330A discloses that the condenser rotary table is lowered and connected with the sample cup rotary table, the rotatable titration arm is arranged on one side of the sample cup rotary table, and the titration detection is carried out on each sample by rotation. The deficiency is that:

[0005] The number of samples of the instrument is small, and when adding or replacing samples, manual operation is needed to put them into the instrument one by one, which cannot realize batch addition and rotation of samples.

[0006] 2. Mechanical arm carrying type. Patent CN115327151A discloses that the mechanical arm clamping jaw carries the sample cup between the sample disc, reagent adding and titration position, and digestion position. The deficiency is that:

[0007] The efficiency of mechanical arm carrying between modules is low, and the simultaneous operation of each functional module cannot be realized. CONTENT OF THE UTILITY MODEL

[0008] To solve the above-mentioned deficiencies in the prior art, the utility model provides a water quality detection device based on batch processing technology.

[0009] The purpose of the utility model is realized through the following technical solutions:

[0010] A water quality detection device based on batch processing technology, the water quality detection device comprises a conveying belt, a sample disc, a reagent adding unit, a heating reflux unit and a titration detection unit, and the sample disc is provided with a sample cup;

[0011] Each sample disc has N sample cups, and the number N satisfies i·B / b≤N≤(T3+(-1) n ·T4) / (T5-T1-T2);

[0012] i is a positive integer, T1 is a single sample catalyst adding time using a heating reflux unit, T2 is a single sample cleaning agent adding time using a heating reflux unit, T3 is a heating reflux time, T4 is a cooling time, T5 is a single sample titration detection time, B is a length of the sample disc in a transmission direction, b is a diameter of the sample cup, n is an even number when cooling using a heating reflux unit, and n is an odd number when cooling using a titration detection unit.

[0013] Compared with the prior art, the utility model has beneficial effects:

[0014] 1. No analysis quantity limit;

[0015] Batch samples sequentially enter the first processing position, the second processing position and the titration detection position by using the annular circulation of the conveying belt, and the detection mode is rotated infinitely, so that the sample quantity limit is broken;

[0016] 2. High detection efficiency;

[0017] By designing the number of sample cups on the sample disc, the waiting time (i.e. idle time) of the same sample disc in the processing position or the titration detection position is reduced, and the overall detection efficiency is improved;

[0018] Different samples are processed (adding reagent, heating reflux and titration detection) at the same time, and the detection efficiency is high;

[0019] 3. Simple structure;

[0020] The reagent adding, heating reflux and cooling are all realized by the heating reflux unit, and the titration and detection are performed synchronously, so that the unit structure is simple. BRIEF DESCRIPTION OF DRAWINGS

[0021] The disclosure of the utility model will become more easily understood with reference to the accompanying drawings. It is easy for those skilled in the art to understand that: these drawings are only used for illustrating the technical scheme of the utility model, and are not intended to limit the protection scope of the utility model. In the drawings:

[0022] Figure 1 It is a structure schematic view of a water quality analysis device based on batch processing technology according to an embodiment of the utility model;

[0023] Figure 2 It is a structure schematic view of a heating reflux unit according to an embodiment of the utility model;

[0024] Figure 3 It is a structure schematic view of a titration detection unit according to an embodiment of the utility model. DETAILED DESCRIPTION

[0025] Figures 1-3The optional specific embodiments described in the following description and illustrated in the accompanying drawings teach how to make and use the present application. Some of the features or steps described in the specification are directed to implementing the technology in different embodiments. The technology is not, however, defined by any particular embodiment described or illustrated. Rather, the technology is defined by the claims and their equivalents. The specification is to be construed as embodying all alternatives and equivalents whether or not specifically recited in the specification.

[0026] Embodiment 1

[0027] The water quality detection device based on batch processing technology according to an embodiment of the present application, as shown in the figure, comprises: Figure 1 A conveying belt, a sample disc, a reagent adding unit, a heating reflux unit and a titration detection unit, wherein the sample disc is provided with sample cups 21.

[0028] The conveying belt, the sample disc, the reagent adding unit, the heating reflux unit and the titration detection unit, wherein the sample disc is provided with sample cups 21.

[0029] Each sample disc is provided with N sample cups 21, and the number N satisfies:

[0030] i·B / b≤N≤(T3+(-1) n ·T4) / (T5-T1-T2);

[0031] i is a positive integer, T1 is the time for adding catalyst to a single sample by using the heating reflux unit, T2 is the time for adding cleaning agent to a single sample by using the heating reflux unit, T3 is the heating reflux time, T4 is the cooling time, T5 is the titration detection time of a single sample, B is the length of the sample disc in the conveying direction, b is the diameter of the sample cup 21, n is an even number when cooling by using the heating reflux unit, and n is an odd number when cooling by using the titration detection unit.

[0032] In order to integrate multiple functions on one unit, further, as shown in the figure, the heating reflux unit comprises: Figure 2 A condenser tube 41, a first channel 42, a first liquid adding module and a heating module 31.

[0033] The upper end and the lower end of the condenser tube 41 are both open.

[0034] The first channel 42 is arranged outside the condenser tube 41, and the first channel 42 is provided with a cooling medium.

[0035] The first liquid adding module is arranged to move along the arrangement direction of the sample cups 21 on the sample disc.

[0036] The heating module 31 is arranged to heat the sample cups 21.

[0037] In order to make the heating reflux unit provide cooling function, further,

[0038] The second channel 43 is arranged outside the first channel 42 and is communicated with a gas source and has an open lower end, so that the gas entering the second channel 43 is cooled by the cooling medium in the first channel 42 and then discharged and flows to the sample cup 21, and the temperature of the sample cup 21 is lowered.

[0039] In order to improve the sealing effect of the condenser tube 41 and the sample cup 21, further, the heating reflux unit further comprises:

[0040] A driving unit is arranged for driving the heating module 31 to move up and down, so that the heating module 31 is in contact with the sample cup 21 and lifts the sample cup 21 to move up and is in contact with and seals the condenser tube 41, or the driving unit drives the condenser tube 41 to move up and down respectively, so that the condenser tube 41 is in contact with and separated from the stationary sample cup 21, and the heating module 31 is moved up and down, so that the heating module 31 is in contact with and separated from the sample cup 21;

[0041] An elastic member is arranged between the condenser tube 41 and the condenser tube fixing position (when the sample cup 21 moves up and down) or between the sample cup 21 and the sample cup fixing position (when the condenser tube 41 moves up and down).

[0042] In order to make the titration and detection be synchronized to improve the detection efficiency, further, the titration and detection unit comprises:

[0043] A second liquid adding module and a detector 62 are arranged for moving synchronously along the arrangement direction of the sample cups 21 on the sample disc.

[0044] A magnetic stirrer 51 is arranged at the lower side of the sample cup 21.

[0045] In order to improve the reflux effect, further, the condenser tube 41 has a plurality of curved convex portions 411 with large inner diameters, and the adjacent curved convex portions 411 are connected by a connecting portion 412 with a small inner diameter.

[0046] Embodiment 2

[0047] The application example of the water quality detection device based on batch processing technology in the COD detection according to the embodiment 1 of the utility model.

[0048] In the present application example, at the second processing position 12, the single sample plus catalyst time T1 is 0.5 min, the single sample plus cleaning agent time T2 is 1 min, the heating reflux time T3 is 120 min, and the cooling time T4 is 10 min, i.e., the catalyst adding, heating reflux, cleaning agent adding, and cooling are all performed at the second processing position, and at this time, n is an even number; the single sample titration detection time T5 is 5 min, the sample disc length B is 600 mm, and the sample bottle diameter b is 100 mm. According to i·B / b≤N≤(T3+T4) / (T5-T1-T2), i×6≤N≤31 is obtained, i is a positive integer. Therefore, the optimal sample number of each sample disc is 6, 12, 18, 24, 30, or 36.

[0049] As shown in Figure 1 , the conveying belt is annular, and the first processing position 11, the second processing position 12, and the titration detection position 13 are sequentially arranged in the advancing direction of the conveying belt, and satisfy:

[0050] L1 / T 11 = L2 / T 22 = L3 / T 33 . L1, L2, and L3 are the lengths (in the advancing direction of the conveying belt) of the first processing position 11, the second processing position 12, and the titration detection position 13, respectively, T 11 , T 22 , and T 33 are the residence times of the sample cup at the first processing position 11, the second processing position 12, and the titration detection position 13, respectively.

[0051] As shown in Figure 2 , a plurality of condensing tubes 41 are arranged side by side, the number is consistent with the number of sample cups 21 on the sample disc perpendicular to the advancing direction of the conveying belt, each condensing tube 41 has three curved outer convex portions with a larger inner diameter, and a connecting portion 412 with a smaller inner diameter connecting adjacent curved outer convex portions 411. The outer side of the condensing tube 41 has a closed second passage 42 surrounding the condensing tube, and the condensing water enters the second passage from the upper end inlet and then is discharged from the lower end. The outer side of the second passage 42 has a third passage 43 surrounding the second passage 42, the upper side of the second passage is connected to the air source, and the lower end is open. The lower end opening of the condensing tube 41 has a ring-shaped or cylindrical sealing member.

[0052] The heating module 31 adopts a heating plate, which is arranged on the lower side of the second processing position 12 and moves up and down under the action of the driving unit to lift the sample cup 21 or separate it.

[0053] The first liquid adding module translates along a direction perpendicular to the advancing direction of the conveying belt and is located above each sample cup 21 and condensing tube 41, so that the liquid provided by the first liquid adding module enters each condensing tube 41.

[0054] AsFigure 3 As shown, in the titration detection unit, the liquid adding pipe 61 and the detector 62 of the second liquid adding module are synchronously translated along the direction perpendicular to the advancing direction of the conveying belt, so that the dropping of the reagent and the detection are synchronized.

[0055] The working mode of the water quality detection device based on batch processing technology is as follows:

[0056] A plurality of sample plates are placed on the conveying belt in sequence, each sample plate has N sample cups, and the number N is 6, 12, 18, 24, 30 or 36.

[0057] As shown in the figure, Figure 1 The sample plate moves forward with the conveying belt, and the sample plate is sequentially located at the first processing position 11, the second processing position 12 and the titration detection position 13.

[0058] At the first processing position 11, potassium dichromate and mercury sulfate reagent are added to each sample cup 21.

[0059] At the second processing position 12, the driving unit drives the heating module 31 to move upwards, so that the heating module 31 contacts and lifts the sample cup 21 upwards, the upper end opening of the sample cup 21 contacts the sealing element on the lower side of the condenser tube 41, so that the sealing element is extruded, ensuring the sealing between the condenser tube 41 and the sample cup 21, and at the same time, the spring outside the second channel 43 is extruded.

[0060] The first liquid adding module adds a catalyst (silver sulfate reagent) to each condenser tube 41, and the reagent enters each sample cup 21.

[0061] The heating module 31 works, and the liquid in the sample cup 21 is heated. After heating is completed, the first liquid adding module adds a cleaning agent (pure water) to each condenser tube 41, that is, pure water is added to the sample cup 21.

[0062] The driving unit moves downwards, so that the sample cup 21 and the heating module 31 move downwards, and then the sample cup 21 returns to the original position and is separated from the heating module 31.

[0063] The gas provided by the gas source enters each second channel 43, is cooled by the condensed water in the first channel 42, and then is discharged from the lower end opening. The cold air rapidly cools the sample cup 21, and the cooled sample cup 21 enters the titration detection position.

[0064] At the titration detection position 13, the second heating module adds a ferrous indicator and a ferrous ammonium sulfate titration agent to the sample cup 21, and at the same time, the detector 62 on the left side of the sample cup 21 detects the color of the liquid.

[0065] When the liquid color reaches the titration end point, the sample COD value is calculated according to the amount of ferrous ammonium sulfate.

[0066] Embodiment 3

[0067] According to the application example of the water quality detection device based on batch processing technology in the COD detection of the embodiment 1 of the utility model, different from the embodiment 2 is:

[0068] 1. The first channel 42 outside is not provided with the second channel 43, and the cooling is not carried out at the second processing position 12, but at the titration detection position 13, and the specific mode is as follows: the air flow is provided by the fan to blow the sample cup 21, and then the titration detection is carried out.

[0069] Since the cooling is completed at the titration detection position 13, n is an odd number, i·B / b≤N≤(T3-T4) / (T5-T1-T2), and i×6≤N≤31 is obtained. Therefore, the optimal sample cup number of each sample disc is 6, 12, 18, 24 or 30.

[0070] 2. The driving unit drives the heating module 31 to move up and down, so that the heating module 31 is only in contact with and separated from the sample cup 21, and does not lift the sample cup 21 to move up;

[0071] The driving unit also drives the condenser tube 41 to move up and down, so that the sealing element at the lower end of the condenser tube 41 is in contact with and separated from the upper end opening of the sample cup 21, and the sample cup 21 is stationary at the second processing position 12.

[0072] 3. The elastic member is a spring, which is arranged between the sample cup 21 and the sample cup fixing position, and when the descending condenser tube 41 pushes the sample cup 21 to move down, the elastic member is compressed.

[0073] In the detection method, the driving unit drives the heating module 31 to move up, but does not contact the sample cup 21, and then when the condenser tube 41 moves downward, the condenser tube 41 pushes the sample cup to move down, and then the sample cup 21 is in contact with the heating module 31. When the condenser tube 41 moves up, the sample cup 21 moves up to the original position under the action of the elastic force provided by the spring, and is separated from the heating module 3.

[0074] The above embodiment illustrates that the heating module 31 adopts a heating plate, and of course can also be provided with a heating hole and the like.

Claims

1. A water quality detection device based on batch processing technology, comprising a conveying belt, a sample disc, a reagent adding unit, a heating reflux unit and a titration detection unit, a plurality of sample discs are placed on the conveying belt in sequence, and a sample cup is arranged on the sample disc; characterized in that, Each sample disc has N sample cups, the number N satisfying, i · B / b≤N≤(T3+(-1) n ·T4) / (T5-T1-T2); i is a positive integer, T1 is the time of single sample with catalyst using the heating reflux unit, T2 is the time of single sample with cleaning agent using the heating reflux unit, T3 is the heating reflux time, T4 is the cooling time, T5 is the single sample titration detection time, B is the length of the sample disc in the transmission direction, b is the diameter of the sample cup, n is even when cooling using the heating reflux unit, n is odd when cooling using the titration detection unit; The sample disc is sequentially in the first processing position, the second processing position and the titration detection position as the conveying belt moves forward, the reagent adding unit is arranged in the first processing position, the heating reflux unit is arranged in the second processing position, and the titration detection unit is arranged in the titration detection position.

2. The water quality detection device based on batch processing technology according to claim 1, characterized in that, The heating reflux unit comprises: The upper end and the lower end of the condenser tube are both open; The first channel and the second channel are arranged in sequence outside the condenser tube, the lower end of the second channel is open, and the first channel has a cooling medium; The first liquid adding module moves along the arrangement direction of the sample cup of the sample disc; The heating module is used for heating the sample cup. 3.The water quality detection device based on batch processing technology according to claim 2, characterized in that, The heating reflux unit further comprises: The driving unit is used for driving the heating module to move up and down, or the driving unit is used for driving the condenser tube and the heating module to move up and down respectively; The elastic member is between the sample cup and the sample cup fixing position, or between the condenser tube and the condenser tube fixing position.

4. The water quality detection device based on batch processing technology according to claim 2, characterized in that, The condenser tube has a plurality of curved outer convex parts with a large inner diameter, and the adjacent curved outer convex parts are connected parts with a small inner diameter.

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