Dynamic quality control device for improving liquid preparation precision

Abstract

The utility model discloses a dynamic quality control device for improving the liquid preparation precision, which specifically comprises a labeling unit, a liquid preparation unit, a liquid preparation unit, a liquid preparation unit, a liquid preparation unit and a liquid preparation unit, the labeling pipeline comprises a quantitative loop, a first quantitative valve, a second quantitative valve and a liquid discharge pipe; one end of the first proportional valve is connected with the peristaltic pump through a pipeline, and the other two ends of the first proportional valve are respectively connected with the drain pipe and the first end of the quantitative ring; the common end of the second proportional valve is connected with the second end of the quantitative loop, and the other two ends of the second proportional valve are respectively connected with the liquid preparation tank and the labeling mother liquor bottle through pipelines; a liquid sensor is arranged between the peristaltic pump and the first proportional valve; a dropping liquid counter is arranged at a connecting pipeline of the liquid preparation tank and the second proportional valve; according to the labeling unit disclosed by the embodiment of the invention, the quantitative ring, the liquid sensor and the dropping liquid counter are matched with one another; therefore, intelligent dynamic configuration of the labeled water sample with variable concentration is realized, and the accuracy of a quality control evaluation analysis instrument can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of water quality monitoring quality control instruments, and in particular relates to a dynamic quality control device for improving liquid distribution accuracy. Background Art

[0002] In the process of water quality monitoring, it is inevitable to encounter situations where the measurement data results of analytical instruments fluctuate greatly. It is difficult for the superior management department to determine whether there is a problem with the analytical instrument itself or whether the water quality has changed. Therefore, the water quality monitoring quality control system came into being. The quality control system is a quality monitoring system that can check whether the online water quality analyzer is working properly and whether the analysis data is valid. It can set the required configuration standard solution concentration through the local or remote control platform and transmit it to the analytical instrument. By controlling the analytical instrument, the data obtained by its analysis is obtained, and the known concentration standard solution is used to verify and compare the measurement and analysis results to achieve the purpose of quality control of the analytical instrument. When doing the spike recovery rate, it is necessary to dynamically adjust the amount of added substance according to the concentration of the substance contained in the on-site water sample to ensure that the analytical measurement method of the analytical instrument is suitable for the monitoring of the on-site water quality conditions, improve the authenticity and effectiveness of the data, and truly reflect the on-site water quality conditions.

[0003] At present, part of the existing quality control system uses a high-precision plunger pump with a multi-channel switching valve or several three-way valves to perform quantitative addition of different liquids. In this way, different liquids will come into contact with the piston inside the plunger pump, and there will be liquid residue between the piston and the inner wall gap, resulting in cross contamination. There are also some dynamic standard addition quality control devices that introduce a liquid storage ring as an intermediate link on the basis of the above, and use a small section of air isolation. Although it avoids the standard liquid from directly entering the plunger pump cavity and avoids the cross contamination of different liquids, the cost of the entire system is high and the economy is poor, resulting in generally high prices for quality control equipment, which is not conducive to comprehensive market promotion and application.

[0004] The metering part of the other part of the dynamic spike quality control device uses an imported high-precision metering diaphragm pump, which is driven and controlled by a pulse signal. A single pulse can achieve a fixed 5μL liquid addition. The spike volume is calculated by the mother solution concentration, fixed volume, and concentration of the standard solution to be prepared, and then the number of pulses is calculated to achieve accurate quantitative addition. This method requires pulse number calculation, and the single-step addition amount is small, so it takes a long time to configure the standard solution by yourself, and the work efficiency is low. In addition, the procurement cycle of high-precision metering diaphragm pumps is long and the price is very high, which is not conducive to the long-term development of the product. Utility Model Content

[0005] In view of the above-mentioned problems existing in the prior art, an embodiment of the utility model provides a dynamic quality control device for improving the liquid preparation accuracy, which can not only intelligently and dynamically configure spiked water samples with variable concentrations to improve the accuracy of liquid preparation of spiked water samples; but also can effectively control the reliability of the analysis data output by the analytical instrument, thereby ensuring that the analytical measurement method of the analytical instrument is suitable for the monitoring of the water quality conditions on site.

[0006] According to a first aspect of an embodiment of the utility model, a dynamic quality control device for improving liquid preparation accuracy is provided, the dynamic quality control device comprising: a standard addition unit, comprising a liquid preparation tank, a peristaltic pump, a standard addition mother liquid bottle and a standard addition pipeline; the standard addition pipeline comprises a quantitative loop, a first quantitative valve, a second quantitative valve, and a liquid discharge pipe; one end of the first quantitative valve is connected to the peristaltic pump through a pipeline, and the other two ends of the first quantitative valve are respectively connected to the liquid discharge pipe and the first end of the quantitative loop; one end of the second quantitative valve is connected to the second end of the quantitative loop, and the other two ends of the second quantitative valve are respectively connected to the liquid preparation tank and the standard addition mother liquid bottle through a pipeline; a liquid sensor is arranged between the peristaltic pump and the first quantitative valve, and a drop counter is arranged at the connecting pipeline between the liquid preparation tank and the second quantitative valve;

[0007] The liquid dispensing tank and the second metering valve are connected via a connecting pipe; one end of the connecting pipe is connected to the second metering valve, and the other end extends into the liquid dispensing tank; wherein the other end of the connecting pipe is configured as a drip pot structure.

[0008] Optionally, the first quantitative valve and the second quantitative valve both include a normally open end, a normally closed end and a common end; the normally open end of the first quantitative valve is connected to the first end of the quantitative ring, and the normally closed end of the first quantitative valve is connected to the discharge pipe; the normally open end of the second quantitative valve is connected to the liquid preparation tank through a pipeline, and the normally closed end of the second quantitative valve is connected to the labeled mother liquid bottle through a pipeline.

[0009] Optionally, the device further includes: an air intake unit; the air intake unit includes an air pump and a one-way valve; one end of the one-way valve extends to the bottom of the liquid dispensing tank through a pipeline, and the other end of the one-way valve is connected to the air pump through a pipeline.

[0010] Optionally, the device also includes: a sampling unit; the sampling unit includes a sampling pump and a first solenoid valve; the common end of the first solenoid valve is connected to one end of the sampling pump; the normally open end of the first solenoid valve is connected to a water sample collection pipeline, and the normally closed end of the first solenoid valve is connected to a pure water collection pipeline; the other end of the sampling pump extends to the interior of the liquid preparation tank through a pipeline.

[0011] Optionally, the device also includes: a sample supply unit; the sample supply unit includes a second solenoid valve, a water sample cup, a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve, a span standard liquid bottle, and a zero point standard liquid bottle; the common end of the second solenoid valve extends to the bottom of the liquid preparation tank through a pipeline, and the normally open end of the second solenoid valve is connected to the normally closed end of the third solenoid valve through a pipeline; the normally open end of the third solenoid valve is connected to the water sample cup through a pipeline, the common end of the third solenoid valve is connected to the normally open end of the fourth solenoid valve through a pipeline, and the common end of the fourth solenoid valve is connected to an external analysis instrument through a sample supply port; the normally closed end of the fourth solenoid valve is connected to the common end of the fifth solenoid valve through a pipeline, the normally open end of the fifth solenoid valve is connected to the span standard liquid bottle through a pipeline, and the normally closed end of the fifth solenoid valve is connected to the zero point standard liquid bottle through a pipeline.

[0012] Optionally, the device also includes: an emptying and constant volume unit, which includes a sixth solenoid valve and the emptying pump; the normally closed end of the second solenoid valve is connected to the normally open end of the sixth solenoid valve through a pipeline, the normally closed end of the sixth solenoid valve extends to a preset height inside the liquid dispensing tank through a pipeline, and the common end of the sixth solenoid valve is connected to the emptying pump through a pipeline; an emptying port is provided at the bottom of the liquid dispensing tank, and an emptying valve is installed at the emptying port, one end of the emptying valve is connected to the emptying port through a pipeline, and the other end is connected to one end of the emptying pump through a pipeline; the other end of the emptying pump is connected to a liquid discharge port.

[0013] Optionally, a direct-mounted liquid level sensor facing the interior of the liquid preparation tank is installed on the cover of the liquid preparation tank; the direct-mounted liquid level sensor is used to control the amount of water sample or pure water added to the liquid preparation tank.

[0014] Optionally, an overflow port is provided on the side wall of the liquid dispensing tank, and a first distance between the overflow port and a cup cover of the liquid dispensing tank is greater than a height of the direct-mounted liquid level sensor.

[0015] Optionally, both the span standard liquid bottle and the zero point standard liquid bottle are installed with liquid level sensors.

[0016] Optionally, one end of the one-way valve is configured as a diverter air guide pot structure and extends to the bottom of the liquid preparation tank through a pipeline.

[0017] An embodiment of the utility model provides a dynamic quality control device for improving liquid preparation accuracy, the device comprising: a standard addition unit, comprising a liquid preparation tank, a peristaltic pump, a standard addition mother liquid bottle and a standard addition pipeline; the standard addition pipeline comprises a quantitative ring, a first quantitative valve, a second quantitative valve, and a discharge pipe; one end of the first quantitative valve is connected to the peristaltic pump through a pipeline, and the other two ends of the first quantitative valve are respectively connected to the discharge pipe and the first end of the quantitative ring; one end of the second quantitative valve is connected to the second end of the quantitative ring, and the other two ends of the second quantitative valve are respectively connected to the liquid preparation tank and the standard addition mother liquid bottle through a pipeline; a liquid sensor is arranged between the peristaltic pump and the first quantitative valve, and a drop counter is arranged at the connecting pipeline between the liquid preparation tank and the second quantitative valve. This embodiment improves the measurement accuracy of the mother liquor in the quantitative loop by setting a quantitative loop and discharging the excess mother liquor in the spiked pipeline based on the detection result of the liquid sensor when performing the liquid extraction operation; at the same time, when performing the mother liquor release operation, the residual mother liquor in the spiked pipeline is back-sucked based on the detection result of the drop counter, thereby improving the accuracy of mother liquor addition; thereby, not only the intelligent dynamic configuration of variable concentration spiked water samples is realized, but also the accuracy of quality control evaluation and analysis instruments can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0019] Figure 1 A schematic diagram of the structure of a dynamic quality control device provided in one embodiment of the utility model;

[0020] Among them, there are a first metering valve 10, a second metering valve 11, a first solenoid valve 13, a second solenoid valve 12, a third solenoid valve 14, a fourth solenoid valve 16, a fifth solenoid valve 17, a sixth solenoid valve 15, a peristaltic pump 20, a sampling pump 21, an air pump 22, an emptying pump 23, a liquid sensor 30, a drop counter 31, a direct-mounted liquid level sensor 32, a mother liquid bottle 40, a water sample cup 41, a span standard liquid bottle 42, a zero point standard liquid bottle 43, a liquid preparation tank 50, a one-way valve 60, a discharge pipe 70, an overflow port 71, an air inlet 72, a water sample collection pipeline 73, a pure water collection pipeline 74, a sample supply port 75, a discharge port 76, and a quantitative ring 80. DETAILED DESCRIPTION

[0021] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0022] like Figure 1 , which is a schematic diagram of the structure of a dynamic quality control device provided in one embodiment of the utility model.

[0023] A dynamic quality control device for improving liquid preparation accuracy, the device at least comprises: a standard addition unit, comprising a liquid preparation tank 50, a peristaltic pump 20, a standard addition mother liquid bottle 40 and a standard addition pipeline; the standard addition pipeline comprises a quantitative ring 80, a first quantitative valve 10, a first quantitative valve 11, and a discharge pipe; one end of the first quantitative valve 10 is connected to the peristaltic pump 20 through a pipeline, and the other two ends of the first quantitative valve 10 are respectively connected to the discharge pipe 70 and the first end of the quantitative ring 80; the common end of the first quantitative valve 11 is connected to the second end of the quantitative ring 80, and the other two ends of the first quantitative valve 11 are respectively connected to the liquid preparation tank 50 and the standard addition mother liquid bottle 40 through a pipeline; a liquid sensor 30 is arranged between the peristaltic pump 20 and the first quantitative valve 10, the A drop counter 31 is provided at the connecting pipeline between the liquid preparation tank 50 and the first quantitative valve 11; the labeling unit is used to control the peristaltic pump 20 to extract the mother liquid from the labeled mother liquid bottle 40 to the labeling pipeline based on the triggering of the labeled mother liquid extraction instruction; and after receiving the liquid signal detected by the liquid sensor 30, the peristaltic pump 20 is controlled to discharge the mother liquid at the common end pipeline of the first quantitative valve 10 through the discharge pipe; the labeling unit is also used to control the peristaltic pump 20 to transport the mother liquid in the quantitative ring 80 to the liquid preparation tank 50 according to the preset time based on the triggering of the labeled mother liquid release instruction; and when receiving the last drop of the preset number of drops detected by the drop counter 31, the peristaltic pump 20 is controlled to slow down and then back-suck the residual mother liquid in the labeling pipeline.

[0024] By setting a quantitative ring 80 and a liquid sensor 30, this embodiment can control the peristaltic pump 20 to extract mother liquid from the labeled mother liquid bottle 40 into the quantitative ring 80 based on the triggering of the labeled mother liquid extraction instruction, and control the peristaltic pump 20 to discharge the mother liquid at the common end pipeline of the first quantitative valve 10 through the discharge pipe after the liquid sensor 30 detects the liquid signal; thereby improving the accuracy of the volume of the mother liquid extracted in the quantitative ring 80; by setting a drop counter 31, the mother liquid in the quantitative ring 80 can be accurately transported to the liquid preparation tank 50 based on the detection result of the drop counter 31 based on the triggering of the labeled mother liquid release instruction; to this end, dynamic and intelligent configuration of quality control samples of any concentration is realized, which not only reduces the error caused by manual configuration of standard liquid on site; but also can quickly and accurately realize the specified addition of any volume of standard liquid, thereby improving the accuracy of the preparation of the labeled water sample.

[0025] In a preferred implementation manner of the present embodiment, the device further includes: the liquid dispensing tank 50 and the first metering valve 11 are connected via a connecting pipe; one end of the connecting pipe is connected to the first metering valve 11, and the other end extends into the liquid dispensing tank 50; wherein the other end of the connecting pipe is configured as a drip pot structure; the marking unit is used to adjust the rotation speed of the peristaltic pump 20 based on the triggering of the dripping instruction to reach a preset rotation speed so that the peristaltic pump 20 and the drip pot structure cooperate to control the volume of the droplets dripping into the liquid dispensing pipe to remain constant.

[0026] This embodiment controls the rotation speed of the peristaltic pump 20 to reach a preset rotation speed, so that the volume of the droplets dripped from the other end of the connecting tube can be controlled to remain constant; the other end of the connecting tube is configured as a drip pot structure, which can effectively isolate the droplets from the air, thereby reducing the impact of the external environment on the droplet volume, thereby improving the accuracy of the droplet volume.

[0027] In another preferred implementation manner of the present embodiment, the first quantitative valve 10 and the first quantitative valve 11 both include a normally open end, a normally closed end and a common end; the normally open end of the first quantitative valve 10 is connected to the first end of the quantitative ring 80, and the normally closed end of the first quantitative valve 10 is connected to the discharge pipe 70; the normally open end of the second quantitative valve 11 is connected to the liquid preparation tank 50 through a pipeline, and the normally closed end of the second quantitative valve 11 is connected to the standard addition mother liquid bottle 40 through a pipeline; the standard addition unit is used to switch the normally closed end of the first quantitative valve 11 to the normally open end based on the triggering of the standard addition mother liquid extraction instruction, and then control the peristaltic pump 20 to rotate clockwise to extract the mother liquid in the standard addition mother liquid bottle 40 to the mother liquid in the standard addition mother liquid bottle 40. The standard adding pipeline; and when receiving the liquid signal detected by the liquid sensor 30, the normally closed end of the first metering valve 10 is switched to the normally open end and the second metering valve 11 is reset, and then the peristaltic pump 20 is controlled to rotate counterclockwise to discharge the mother liquid at the common end pipeline of the first metering valve 10 through the discharge pipe; the standard adding unit is also used to control the peristaltic pump 20 to rotate counterclockwise at a preset speed based on the triggering of the standard adding mother liquid release instruction to transport the mother liquid in the metering ring 80 to the liquid mixing tank 50 according to the preset time; and when receiving the last drop of the preset number of drops detected by the drop counter 31, the peristaltic pump 20 is controlled to rotate clockwise to suck back the residual mother liquid in the standard adding pipeline.

[0028] Specifically, based on the triggering of the labeled mother liquid extraction instruction, the labeling unit switches the normally closed end of the first metering valve 11 to the normally open end, and then controls the peristaltic pump 20 to rotate clockwise at a preset speed so as to extract the mother liquid in the labeled mother liquid bottle 40 into the labeling pipeline; thereafter, the labeling unit switches the normally closed end of the first metering valve 10 to the normally open end when receiving the liquid signal detected by the liquid sensor 30 after the peristaltic pump 20 discharges the liquid, and then controls the peristaltic pump 20 to rotate counterclockwise at a preset speed so as to discharge the mother liquid at the common end pipeline of the first metering valve 10 through the discharge pipe; thereby, the accuracy of the mother liquid transported to the liquid preparation tank 50 by the quantitative ring 80 can be ensured.

[0029] Based on the triggering of the release instruction of the standard addition mother liquid, the standard addition unit controls the peristaltic pump 20 to rotate counterclockwise at a preset speed to deliver the mother liquid in the quantitative ring 80 to the liquid preparation tank 50 at a preset time; and then, when the standard addition unit receives the last drop of the preset number of drops detected by the drop counter 31, it controls the peristaltic pump 20 to rotate clockwise to suck back the residual mother liquid in the standard addition pipeline. In this way, the accuracy of the volume of the mother liquid added to the liquid preparation tank 50 can be ensured.

[0030] Here, since the rotation speed of the peristaltic pump 20 is a preset rotation speed, the time for conveying the mother liquid to the liquid preparation tank 50 is also constant.

[0031] In another preferred implementation manner of the present embodiment, the device further includes: an air intake unit; the air intake unit includes an air pump 22 and a one-way valve 60; one end of the one-way valve 60 is configured as a diversion air guide pot structure and extends to the bottom of the liquid preparation tank 50 through a pipeline, and the other end of the one-way valve 60 is connected to one end of the air pump 22 through a pipeline; an air inlet 72 is provided at the other end of the air pump 22; the air intake unit is used to control the air pump 22 to extract external air based on the triggering of the mixing instruction, and to transport the extracted air to the liquid preparation tank 50 through the one-way valve 60 to aerate and mix the quality control sample in the liquid preparation tank 50; wherein, the quality control sample is used to indicate a water sample or a spiked water sample.

[0032] When performing the detection of quality control samples of any concentration, this embodiment controls the air intake unit to stir the quality control sample in the liquid preparation tank 50, which is beneficial to the mixing of the water sample or pure water with the mother liquor, thereby improving the accuracy of the reliability detection of the data output by the analytical instrument.

[0033] In another preferred implementation manner of the present embodiment, the device further includes: a sampling unit; the sampling unit includes a sampling pump 21 and a first solenoid valve 13; the common end of the first solenoid valve 13 is connected to one end of the sampling pump 21; the normally open end of the first solenoid valve 13 is connected to a water sample collection pipeline 73, and the normally closed end of the first solenoid valve 13 is connected to a pure water collection pipeline 74; the other end of the sampling pump 21 extends to the interior of the liquid dispensing tank 50 through a pipeline; the sampling unit is used to extract water samples into the liquid dispensing tank 50 based on the triggering of the first sampling instruction; and based on the triggering of the second sampling instruction, the normally closed end of the first solenoid valve 13 is controlled to switch to the normally open end, and then the sampling pump 21 is controlled to extract pure water into the liquid dispensing tank 50.

[0034] In another preferred implementation of this embodiment, a direct-mounted liquid level sensor 32 facing the inside of the liquid dispensing tank 50 is installed on the cover of the liquid dispensing tank 50; the sampling unit is also used to control the sampling pump 21 to stop extracting water samples or pure water after receiving the liquid signal detected by the direct-mounted liquid level sensor 32. The direct-mounted liquid level sensor 32 is set at a preset height of the liquid dispensing tank 50.

[0035] Specifically, during the sampling process, the liquid level sensor detects the mother liquid in the liquid preparation tank 50, and after detecting the liquid signal, sends the liquid signal to the sampling unit, and the sampling unit controls the sampling pump 21 to stop working. In this way, it can ensure that the volume of the water sample or pure water pumped into the liquid preparation tank 50 remains constant.

[0036] In another preferred implementation manner of the present embodiment, the device further includes an alarm module; the alarm module is used to monitor the extraction time based on the triggering of the spiked mother liquor extraction instruction, and to issue an alarm message when the liquid signal of the liquid sensor 30 is not received after the extraction time reaches a preset time; the alarm module is also used to monitor the injection time based on the triggering of the first injection instruction or the triggering of the second injection instruction, and to issue an alarm message when the liquid signal of the direct-mounted liquid level sensor 32 is not received after the injection time reaches a preset time.

[0037] The span mark liquid bottle 42 and the zero mark liquid bottle 43 are both provided with liquid level sensors. The alarm module is also used to monitor the use time of the peristaltic pump 20, and issue an alarm prompt message after the monitoring time meets the preset time; the alarm module is also used to receive liquid signals detected by the liquid level sensors in the span mark liquid bottle 42 and the zero mark liquid bottle 43, and issue an alarm prompt message based on the liquid signals.

[0038] This embodiment monitors the pumping time through the alarm module, and sends out an alarm message when the liquid signal of the liquid sensor 30 is not received after the pumping time reaches the preset time; thereby, the sampling failure can be effectively monitored; the injection time is monitored through the alarm module, and an alarm message is sent out when the liquid signal of the direct-mounted liquid level sensor is not received after the injection time reaches the preset time; thereby, the injection failure can be effectively monitored; the use time of the peristaltic pump 20 is monitored through the alarm module, and an alarm prompt message is sent out after the monitoring result meets the preset time, thereby enabling the peristaltic pump 20 to be replaced in time, thereby improving the accuracy of the dynamic quality control device in detecting the analytical instrument.

[0039] In another preferred implementation manner of the present embodiment, the device further includes: a sample supply unit; the sample supply unit includes a second solenoid valve 12, a water sample cup 41, a third solenoid valve 14, a fourth solenoid valve 16, a fifth solenoid valve 17, a span standard liquid bottle 42, and a zero point standard liquid bottle 43; the common end of the second solenoid valve 12 extends to the bottom of the liquid dispensing tank 50 through a pipeline, and the normally open end of the second solenoid valve 12 is connected to the normally closed end of the third solenoid valve 14 through a pipeline; the normally open end of the third solenoid valve 14 is connected to the water sample cup 41 through a pipeline, and the common end of the third solenoid valve 14 is connected to the normally open end of the fourth solenoid valve 16 The common end of the fourth solenoid valve 16 is connected to an external analytical instrument through a sample supply port 75; the normally closed end of the sixth quantitative is connected to the common end of the fifth solenoid valve 17 through a pipeline, the normally open end of the fifth solenoid valve 17 is connected to the span standard liquid bottle 42 through a pipeline, and the normally closed end of the fifth solenoid valve 17 is connected to the zero point standard liquid bottle 43 through a pipeline; the sample supply unit is used to be linked with the emptying pump 23 after switching the normally closed end of the second solenoid valve 12, and after actively delivering the quality control sample of the liquid preparation tank 50 to the normally closed end of the second solenoid valve 12 at a preset time, the third solenoid valve is triggered based on the first sample supply instruction. The normally closed end of 14 is switched to a normally open end, and the external analysis instrument is controlled to extract the quality control sample to be detected from the liquid preparation tank 50 through the self-contained sampling pump, and the quality control sample to be detected flows out of the liquid preparation tank 50 through the second solenoid valve 12, the third solenoid valve 14 and the fourth solenoid valve 16 to reach the external analysis instrument; the sample supply unit is also used to control the external analysis instrument to extract the water sample to be detected from the water sample cup 41 through the self-contained sampling pump based on the triggering of the second sample supply instruction, and the water sample to be detected flows out of the water sample cup 41 through the third solenoid valve 14 and the fourth solenoid valve 16 to reach the external analysis instrument; the sample supply unit is also used to control the external analysis instrument to extract the water sample to be detected from the water sample cup 41 through the self-contained sampling pump based on the triggering of the third sample supply instruction After the triggering of the command, the normally closed end of the fourth solenoid valve (16) is switched to the normally open end, and then the external analysis instrument is controlled to extract the zero point standard liquid from the zero point standard liquid bottle 43 through the built-in sampling pump, and the zero point standard liquid flows out of the zero point standard liquid bottle 43 and is transported to the external analysis instrument via the fourth solenoid valve 16 and the fifth solenoid valve 17; and based on the triggering of the fourth sampling instruction, the normally open end of the fifth solenoid valve 17 is switched to the normally closed end, and then the external analysis instrument is controlled to extract the span standard liquid from the span standard liquid bottle 42 through the built-in sampling pump, and the span standard liquid flows out of the span standard liquid bottle 42 and is transported to the external analysis instrument via the fourth solenoid valve 16 and the fifth solenoid valve 17.

[0040] By setting up a sample supply unit, this embodiment can transport the water sample to be tested, the quality control sample to be tested, the span standard solution or the zero point standard solution to the external analytical instrument respectively; thereby, the zero point verification, span verification, multi-point linear verification, spiked recovery rate test, parallel sample test, actual water sample comparison or standard solution verification can be realized on the external analytical instrument; thereby, the external analytical instrument can be comprehensively quality controlled, thereby improving the accuracy of the quality control of the external analytical instrument.

[0041] In another preferred implementation manner of the present embodiment, the device further includes: an emptying and constant volume unit, the emptying and constant volume unit including a sixth solenoid valve 15 and the emptying pump 23; the normally closed end of the second solenoid valve 12 is connected to the normally open end of the sixth solenoid valve 15 through a pipeline, the normally closed end of the sixth solenoid valve 15 is extended to a preset height inside the liquid dispensing tank 50 through a pipeline, and the common end of the sixth solenoid valve 15 is connected to the emptying pump 23 through a pipeline; an emptying port is provided at the bottom of the liquid dispensing tank 50, and an emptying valve is installed at the emptying port, and one end of the emptying valve is connected to the The emptying port is connected by a pipeline, and the other end is connected to one end of the emptying pump 23 through a pipeline; the other end of the emptying pump is connected to a liquid discharge port 76; the emptying and constant volume unit is used to control the emptying pump 23 to extract the liquid in the liquid dispensing tank 50 after opening the emptying valve based on the triggering of the emptying instruction; the emptying and constant volume unit is also used to control the emptying pump 23 to extract the liquid in the liquid dispensing tank 50 after switching the normally closed end of the sixth solenoid valve 15 to the normally open end based on the triggering of the constant volume instruction until the liquid in the liquid dispensing tank 50 reaches a preset height and then the liquid extraction operation is terminated.

[0042] Specifically, this embodiment can effectively clean the liquid preparation tank 50 or the spiked unit by setting an emptying and constant volume unit, and discharge the cleaning liquid through the emptying valve, thereby improving the accuracy of the dynamic quality control device detection. In addition, this embodiment extends the normally closed end of the sixth solenoid valve 15 to a preset height inside the liquid preparation tank 50 through a pipeline, and then based on the triggering of the constant volume instruction, the emptying pump 23 can be used to empty the excess liquid in the liquid preparation tank 50, thereby accurately determining the volume of the liquid in the liquid preparation tank 50; thus, the spiked water sample with a variable concentration can be intelligently and dynamically configured to improve the accuracy of the spiked water sample preparation.

[0043] Here, the first metering valve 10 , the first metering valve 11 , the first solenoid valve 13 , the second solenoid valve 12 , the third solenoid valve 14 , the fourth solenoid valve 16 , the fifth solenoid valve 17 and the sixth solenoid valve 15 are all three-way valves.

[0044] It should be noted that the price of injection pumps or plunger pumps in the industry is more than 900 yuan, and the imported metering diaphragm pumps are around 3,000 yuan, while the peristaltic pump 20 of this solution can be controlled within 400 yuan; therefore, this embodiment can reduce the dependence on high-value injection pumps, plunger pumps, and high-precision metering diaphragm pumps, thereby reducing the cost of dynamic quality control devices by at least 60%, which is conducive to the comprehensive market promotion and application.

[0045] It should also be noted that functions such as zero-point verification, span verification, multi-point linear verification, parallel sample testing, actual water sample comparison, and standard solution verification can be integrated into external analytical instruments, but the spike recovery rate test still needs to be implemented based on a dynamic quality control device.

[0046] An overflow port 71 is disposed on the side wall of the liquid dispensing tank 50 . A first distance between the overflow port 71 and the cup cover of the liquid dispensing tank 50 is greater than the height of the direct-mounted liquid level sensor 32 .

[0047] A control method for a dynamic quality control device for improving liquid preparation accuracy, the method comprising at least the following steps:

[0048] S1, obtaining the volume of the mother solution to be added, and comparing the volume of the mother solution to be added with the maximum base volume of the mother solution that the quantitative loop can hold;

[0049] S2, if the comparison result indicates that the volume of the mother liquid to be added is smaller than the base volume, then based on the volume of the mother liquid to be added and the preset drop volume, determine a single addition process and a first preset drop quantity; based on the addition instruction trigger, control the peristaltic pump to perform the addition operation according to the single addition process and the first preset drop quantity; wherein the single addition process is used to indicate that one extraction operation and one discharge operation are completed for the quantitative loop;

[0050] S3. If the comparison result indicates that the volume of the mother liquid to be added is not less than the base volume, then based on the volume of the mother liquid to be added and the preset drip volume, determine the number of repetitions of the addition process and the second preset number of drops; based on the addition instruction trigger, control the peristaltic pump to perform the addition operation according to the number of repetitions of the addition process and the second preset number of drops.

[0051] Specifically, a liquid extraction operation includes: based on the triggering of the spiked mother liquid extraction instruction, controlling the peristaltic pump to extract the mother liquid from the spiked mother liquid bottle to the spiked pipeline; and after receiving the liquid signal detected by the liquid sensor, controlling the peristaltic pump to discharge the mother liquid at the common end pipeline of the first quantitative valve through the discharge pipe. A liquid discharge operation includes: based on the triggering of the spiked mother liquid release instruction, controlling the peristaltic pump to transfer the mother liquid in the quantitative loop to the liquid preparation tank in a titration manner; and controlling the peristaltic pump to slow down and reversely suck the residual mother liquid in the spiked pipeline after receiving the last drop of the first preset number of drops detected by the drop counter.

[0052] For example: the base volume of the quantitative loop is 1.2ml, and the volume of the mother liquid to be added is 1.5ml. Two addition processes are required to complete the addition. The first addition process adds a quantitative loop of mother liquid; the second addition process requires the remaining 0.3ml to be added to the liquid preparation tank by titration. The preset drop volume is 0.05ml, and quantitative addition is achieved through 6 drops.

[0053] Exemplarily, based on the triggering of the spike instruction, the peristaltic pump is controlled to perform the spike operation according to the single spike process and the first preset number of drops; including: based on the triggering of the spike mother liquid extraction instruction, the peristaltic pump is controlled to extract the mother liquid from the spike mother liquid bottle to the spike pipeline; and after receiving the liquid signal detected by the liquid sensor, the peristaltic pump is controlled to discharge the mother liquid at the common end pipeline of the first quantitative valve through the discharge pipe; based on the triggering of the spike mother liquid release instruction, the peristaltic pump is controlled to transport the mother liquid in the quantitative loop to the liquid preparation tank in a titration manner; and when the last drop of the first preset number of drops is detected by the drop counter, the peristaltic pump is controlled to slow down and then back-suck the residual mother liquid in the spike pipeline.

[0054] Exemplarily, based on the triggering of the spike instruction, the peristaltic pump is controlled to perform the spike operation according to the number of repetitions of the spike process and the second preset number of drops; including: based on the triggering of the spike mother liquid extraction instruction, the peristaltic pump is controlled to extract the mother liquid from the spike mother liquid bottle to the spike pipeline; and after receiving the liquid signal detected by the liquid sensor, the peristaltic pump is controlled to discharge the mother liquid at the common end pipeline of the first quantitative valve through the discharge pipe; based on the triggering of the spike mother liquid release instruction, the peristaltic pump is controlled to transport the mother liquid in the quantitative loop to the liquid preparation tank according to the preset time; if the current number of spike processes reaches the number of repetitions of the spike process, based on the triggering of the last spike mother liquid release instruction, the peristaltic pump is controlled to transport the mother liquid in the quantitative loop to the liquid preparation tank in a titration manner; and when the last drop of the second preset number of drops is detected by the drop counter, the peristaltic pump is controlled to slow down and then back-suck the residual mother liquid in the spike pipeline.

[0055] The control method of the dynamic quality control device provided in this embodiment is described in detail below in conjunction with specific applications.

[0056] Based on the triggering of the fourth sample supply instruction, the dynamic quality control device performs zero-point verification on the external analytical instrument.

[0057] Based on the triggering of the third sample supply instruction, the dynamic quality control device implements span verification on the external analytical instrument.

[0058] Based on various instructions such as triggering the first injection instruction, triggering the constant volume instruction, triggering the emptying instruction, triggering the spiked mother liquor extraction instruction, triggering the spiked mother liquor release instruction, triggering the stirring instruction and triggering the first sample supply instruction, the dynamic quality control device tests the external analytical instrument to achieve spiked recovery rate test.

[0059] Based on various instructions such as triggering of a first injection instruction, triggering of a first sample supply instruction, triggering of an emptying instruction, and triggering of a stirring instruction, the dynamic quality control device implements parallel sample testing on an external analytical instrument.

[0060] Based on the triggering of the second sample supply instruction, the dynamic quality control device realizes actual water sample comparison with the external analytical instrument.

[0061] Based on various instructions such as triggering the second injection instruction, triggering the spiked mother solution extraction instruction, triggering the spiked mother solution release instruction, triggering the constant volume instruction, triggering the emptying instruction, and triggering the mixing and stirring instruction, the dynamic quality control device realizes the verification of different standard solutions for the external analytical instrument.

[0062] The dynamic quality control device of this embodiment detects the output data of the external analysis instrument based on known data, thereby effectively monitoring the reliability of the data output by the external analysis instrument, and then determining whether the analysis method used by the external analysis instrument is suitable for the current on-site water quality detection, which is beneficial to improving the accuracy of the external analysis instrument in on-site water quality detection.

[0063] The dynamic quality control device of this embodiment can accurately detect the reliability of data output by an external analytical instrument using only a peristaltic pump, which not only reduces the cost of the dynamic quality control device but also realizes intelligent quality control.

[0064] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0065] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0066] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0067] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0068] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0070] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0071] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A dynamic quality control device for improving liquid preparation accuracy, characterized in that: include: The spike adding unit includes a liquid preparation tank, a peristaltic pump, a spike adding mother liquid bottle and a spike adding pipeline; The standard addition pipeline includes a quantitative ring, a first quantitative valve, a second quantitative valve, and a discharge pipe; one end of the first quantitative valve is connected to the peristaltic pump through a pipeline, and the other two ends of the first quantitative valve are respectively connected to the discharge pipe and the first end of the quantitative ring; one end of the second quantitative valve is connected to the second end of the quantitative ring, and the other two ends of the second quantitative valve are respectively connected to the liquid preparation tank and the standard addition mother liquid bottle through pipelines; a liquid sensor is arranged between the peristaltic pump and the first quantitative valve, and a drop counter is arranged at the connecting pipeline between the liquid preparation tank and the second quantitative valve; the liquid preparation tank and the second quantitative valve are connected through a connecting pipeline; one end of the connecting pipeline is connected to the second quantitative valve, and the other end extends into the liquid preparation tank; wherein the other end of the connecting pipe is configured as a drip pot structure.

2. The device according to claim 1, characterized in that The first quantitative valve and the second quantitative valve each include a normally open end, a normally closed end and a common end; The normally open end of the first quantitative valve is connected to the first end of the quantitative ring, and the normally closed end of the first quantitative valve is connected to the discharge pipe; the normally open end of the second quantitative valve is connected to the liquid preparation tank through a pipeline, and the normally closed end of the second quantitative valve is connected to the standard mother liquid bottle through a pipeline.

3. The device according to claim 1, characterized in that Also includes: Air intake unit; The air intake unit includes an air pump and a one-way valve; one end of the one-way valve extends to the bottom of the liquid distribution tank through a pipeline, and the other end of the one-way valve is connected to the air pump through a pipeline.

4. The device according to claim 1, characterized in that Also includes: The sampling unit comprises a sampling pump and a first solenoid valve; the common end of the first solenoid valve is connected to one end of the sampling pump; the normally open end of the first solenoid valve is connected to a water sample collection pipeline, and the normally closed end of the first solenoid valve is connected to a pure water collection pipeline; the other end of the sampling pump extends to the interior of the liquid preparation tank through a pipeline.

5. The device according to claim 1, characterized in that Also includes: Sample supply unit; The sample supply unit includes a second solenoid valve, a water sample cup, a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve, a span standard liquid bottle, and a zero point standard liquid bottle; the common end of the second solenoid valve extends to the bottom of the liquid preparation tank through a pipeline, and the normally open end of the second solenoid valve is connected to the normally closed end of the third solenoid valve through a pipeline; the normally open end of the third solenoid valve is connected to the water sample cup through a pipeline, the common end of the third solenoid valve is connected to the normally open end of the fourth solenoid valve through a pipeline, and the common end of the fourth solenoid valve is connected to an external analytical instrument through a sample supply port; the normally closed end of the fourth solenoid valve is connected to the common end of the fifth solenoid valve through a pipeline, the normally open end of the fifth solenoid valve is connected to the span standard liquid bottle through a pipeline, and the normally closed end of the fifth solenoid valve is connected to the zero point standard liquid bottle through a pipeline.

6. The device according to claim 5, characterized in that Also includes: An emptying and constant volume unit, the emptying and constant volume unit comprising a sixth solenoid valve and the emptying pump; The normally closed end of the second solenoid valve is connected to the normally open end of the sixth solenoid valve through a pipeline, the normally closed end of the sixth solenoid valve extends to a preset height inside the liquid dispensing tank through a pipeline, and the common end of the sixth solenoid valve is connected to the emptying pump through a pipeline; a drain port is provided at the bottom of the liquid dispensing tank, a drain valve is installed at the drain port, one end of the drain valve is connected to the drain port through a pipeline, and the other end is connected to one end of the drain pump through a pipeline; the other end of the drain pump (23) is connected to the drain port.

7. The device according to claim 1, characterized in that A direct-mounted liquid level sensor facing the interior of the liquid preparation tank is installed on the cover of the liquid preparation tank; the direct-mounted liquid level sensor is used to control the amount of water sample or pure water added to the liquid preparation tank.

8. The device according to claim 1, characterized in that An overflow port is arranged on the side wall of the liquid dispensing tank, and a first distance between the overflow port and the cup cover of the liquid dispensing tank is greater than a height of the direct-mounted liquid level sensor.

9. The device according to claim 5, characterized in that The span standard liquid bottle and the zero point standard liquid bottle are both equipped with liquid level sensors.

10. The device according to claim 3, characterized in that One end of the one-way valve is configured as a diverter air guide pot structure and extends to the bottom of the liquid preparation tank through a pipeline.

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