Pretreatment system for liquid detection

Abstract

The utility model belongs to the technical field of liquid detection, and provides a pretreatment system for liquid detection, which comprises a liquid pump with a pump liquid opening; the gas pump is provided with a gas pumping port; the gas channel is connected with the liquid pumping port and the gas pumping port; and the control device is in communication connection with the liquid pump and the gas pump, and the control device is suitable for controlling the gas channel to be communicated with the gas pumping opening and the liquid pumping opening so as to achieve gas washing of the liquid parameter detection channel. A gas cleaning link is added, so that the problem of cross contamination can be effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid detection, and in particular relates to a pre-processing system for liquid detection. Background Art

[0002] Liquid parameter measurement is an important criterion for evaluating liquid quality. Surface tension, viscosity, and density are all important physical parameters of liquids and are of great significance to industries such as medicine, chemical industry, metallurgy, and food.

[0003] In the related art, the main method for cleaning pipelines is liquid cleaning, which brings about the problems of long cleaning time, excessive consumption of cleaning liquid, incomplete cleaning and cross contamination. Utility Model Content

[0004] In view of this, the present invention provides a pre-processing system for liquid detection to solve the problems in the prior art of incomplete cleaning, excessive waste of cleaning liquid and / or excessively long cleaning time.

[0005] The utility model provides a pre-processing system for liquid detection, comprising: a liquid pump having a liquid pump port; a gas pump having a gas pump port; a gas channel connecting the liquid pump port and the gas pump port; a control device, which is communicatively connected to the liquid pump and the gas pump respectively, and the control device is suitable for controlling the gas channel to connect the gas pump port and the liquid pump port to achieve gas washing of the liquid parameter detection channel.

[0006] As an optional embodiment, the pre-processing system for liquid detection also includes a liquid mixing tank and a first liquid storage container, the first liquid storage container is suitable for storing samples to be tested, the first liquid storage container has a first liquid outlet, the liquid mixing tank is provided with a liquid adding port, and the control device includes: a valve group, having a first valve port and a second valve port connected to each other, the first valve port being connected to the liquid pump port; a controller, the controller being communicatively connected to the valve group, the controller being suitable for controlling the valve group so that the second valve port is connected to the first liquid outlet, or the controller being suitable for controlling the valve group so that the second valve port is connected to the liquid adding port.

[0007] As an optional embodiment, the valve group includes a multi-way valve or a valve assembly consisting of multiple valves.

[0008] As an optional embodiment, it includes a second liquid storage container, which is suitable for storing cleaning liquid, and the second liquid storage container has a second liquid outlet. The liquid parameter detection channel includes a liquid adding channel, and the liquid adding channel connects the liquid adding channel with the first liquid outlet; wherein, the controller is suitable for controlling the valve group so that the second valve port is connected to the second liquid outlet, so that the liquid pump extracts the cleaning liquid and transports the cleaning liquid to the liquid adding channel for cleaning through the heating channel.

[0009] As an optional embodiment, the liquid distribution tank is provided with a waste liquid port, and the pre-processing system of the liquid detection further includes a third liquid storage container, and the third liquid storage container has a liquid inlet; wherein, the controller is suitable for controlling the valve group so that the second valve port is connected to the waste liquid port, so that the liquid pump extracts the waste liquid in the liquid distribution tank and transports the waste liquid to the third liquid storage container.

[0010] As an optional embodiment, the pre-processing system for liquid detection further includes a drainage channel, one end of the drainage channel is connected to the drainage port, and the other end of the drainage channel is selectively connected to the second valve port.

[0011] As an optional embodiment, one end of the gas channel is connected to the pump liquid port, one end of the gas channel is connected to the first valve port, and the gas pump is provided on the gas channel.

[0012] As an optional implementation, a solenoid valve is provided on the gas channel, and the control device is communicatively connected to the solenoid valve.

[0013] As an optional implementation, the liquid pump is a plunger pump or a peristaltic pump.

[0014] As an optional embodiment, the first liquid outlet is connected to a liquid adding tube, and the liquid adding tube is a hard tube.

[0015] Beneficial effects:

[0016] 1. The utility model is connected to the gas pump through the control device and adds a gas cleaning link, which can effectively solve the problem of cross contamination.

[0017] 2. By setting up a second liquid storage container, a cleaning mode of gas cleaning + liquid cleaning is realized, which further shortens the cleaning time of liquid cleaning and reduces the amount of cleaning liquid used during liquid cleaning, thereby cleaning the pipeline more thoroughly.

[0018] 3. By setting up a third liquid storage container, the waste liquid in the matching pool after testing and cleaning can be recovered and stored, which is more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the principle structure of a pre-processing system for liquid detection according to an embodiment of the present invention;

[0021] Figure 2 This is a control block diagram of a pre-processing system for liquid detection according to an embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 110-liquid pump; 111-pump liquid port; 120-gas pump; 121-pump gas port; 130-gas channel; 140-first liquid storage container; 141, first liquid outlet; 142; liquid adding pipe; 150-liquid dispensing tank; 151-liquid adding port; 152-liquid discharge port; 160-liquid adding channel; 170-control device; 171-valve group; 1711-first valve port; 1712-second valve port; 172-controller; 180-second liquid storage container; 181-second liquid outlet; 182-cleaning pipe; 190-third liquid storage container; 191-liquid inlet; 192-waste liquid pipe; 200-solenoid valve; 300-liquid discharge channel. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0025] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element indicated must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element indicated must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0027] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0028] The cleaning of the pipeline for liquid detection adopts liquid cleaning, which is a relatively common way, and the following problems may exist:

[0029] Sample cross-contamination: when different water samples are transmitted in the pipeline, if the pipeline is not thoroughly cleaned, the residual previous sample may mix into the subsequent sample, resulting in incorrect analysis results. For example, when detecting industrial wastewater of different sources, the residual components of the previous wastewater pollute the detection sample of the subsequent wastewater.

[0030] Microbial contamination: warm and humid environment is easy to breed microorganisms, which attach and grow in the pipeline. This may consume certain components in the water sample, or produce new metabolites, interfering with the analysis results. For example, in a pipeline that has not been used for a long time and has not been properly preserved, microorganisms multiply in large numbers, affecting the detection of organic matter in water.

[0031] Chemical residue contamination: the previously treated water sample contains high concentrations of chemicals, such as strong acid, strong base or heavy metal ions, which remain in the pipeline and pollute the subsequent water sample. For example, after detecting a water sample containing high concentrations of copper ions, the residual copper ions in the pipeline will affect the detection results of copper ions in other low-concentration water samples.

[0032] Particle deposition pollution: Fine particles in the water gradually settle in pipes, reducing the pipe's internal diameter and affecting water flow. They can also release previously adsorbed pollutants, interfering with subsequent water sample analysis. For example, sediment in the water can settle at pipe elbows, interfering with the accurate measurement of turbidity in subsequent water samples.

[0033] Adsorption contamination from pipe linings: Certain components in water samples may be adsorbed by the pipe lining material, resulting in a reduction in concentration. These adsorbed substances may then be desorbed during subsequent passages, causing contamination. For example, organic pollutants are easily adsorbed by the lining of certain plastic pipes.

[0034] The following combination Figure 1 and Figure 2 , describing the embodiments of the present utility model.

[0035] like Figure 1 and Figure 2 As shown, according to an embodiment of the utility model, a pre-processing system for liquid detection is provided, and the parameter detection device includes a liquid pump 110, a gas pump 120, a gas channel 130 and a control device 170, the liquid pump 110 has a liquid pump port 111, the gas pump 120 has a gas pump port 121, the gas channel 130 connects the liquid pump port 111 and the gas pump port 121, the control device 170 is communicatively connected with the liquid pump 110 and the gas pump 120 respectively, and the control device 170 is suitable for controlling the gas channel 130 to connect the gas pump port 121 and the liquid pump port 111 to realize gas washing of the liquid parameter detection channel.

[0036] In this embodiment, it also includes a first liquid storage container 140, a liquid dispensing tank 150 and a liquid parameter detection channel. The liquid parameter detection channel includes a liquid adding channel 160, which connects the liquid adding port 151 and the first liquid outlet 141. The first liquid storage container 140 is suitable for storing samples to be tested, and the liquid storage container has a first liquid outlet 141. The liquid dispensing tank 150 is provided with a liquid adding port 151, and the liquid adding channel 160 connects the liquid adding port 151 and the first liquid outlet 141; the control device 170 is suitable for controlling the liquid adding channel 160 to connect the liquid adding port 151 and the first liquid outlet 141, so that the liquid pump 110 adds the sample to be tested to the liquid dispensing tank 150 through the liquid adding channel 160.

[0037] The first liquid storage container 140 can be a reagent bottle, in which the sample to be tested is stored, and the first liquid outlet 141 is the bottle mouth. The liquid adding channel 160 is arranged between the first liquid outlet 141 and the liquid adding port 151 of the liquid dispensing tank 150, and the pumping port 111 of the liquid pump 110 is connected to the liquid adding channel 160. If it is necessary to add the sample to be tested in the first liquid storage container 140 to the liquid dispensing tank 150, the control device 170 controls the liquid pump 110 to extract the sample to be tested from the first liquid storage container 140 and add the sample to be tested to the liquid dispensing tank 150 through the liquid adding channel 160 for dispensing. After the liquid preparation is completed, if the liquid addition channel 160 needs to be cleaned, considering that only the liquid addition channel 160 between the liquid pump 110 and the liquid preparation tank 150 needs to be cleaned, the control device 170 controls the gas channel 130 to connect the pump gas port 121 and the pump liquid port 111, and the gas pump 120 is started. The gas enters the liquid channel 130 through the pump gas port 121, and then enters the liquid pump 110 through the pump liquid port 111, and then enters the liquid addition channel 160. Therefore, the gas is input into the liquid addition channel 160 through the liquid pump 110 to complete the gas washing of the liquid addition channel 160. By gas washing the liquid addition channel 160, the flow of gas can carry away the sample to be tested attached to the inner wall of the liquid addition channel 160, and cross contamination can be avoided when another liquid is prepared. In addition, the gas washing process can be greatly shortened compared to the liquid washing process, thereby saving the cleaning time of the liquid addition channel 160.

[0038] In addition, before adding liquid, the liquid pump 110 can be air-washed first, so as to completely remove the residual liquid in the liquid pump 110, so that the sample to be tested added to the liquid preparation tank 150 can further reduce or avoid cross-contamination of different liquids, thereby improving the quality of liquid preparation.

[0039] The liquid pump 110 is a plunger pump or a peristaltic pump.

[0040] Optionally, the control device 170 includes: a valve group having a first valve port 1711 and a second valve port 1712 that are interconnected, the first valve port 1711 being connected to the pump liquid port 111; a controller that is communicatively connected to the valve group, the controller being suitable for controlling the valve group so that the second valve port 1712 is connected to the first liquid outlet 141, or the controller being suitable for controlling the valve group so that the second valve port 1712 is connected to the liquid filling port 151.

[0041] In this embodiment, the control device 170 includes a valve group and a controller. The valve group is disposed on the liquid adding channel 160. The first valve port 1711 of the valve group is connected to the liquid pump port 111, and the second valve port 1712 of the valve group can be selectively switched to the first liquid outlet 141, so that the liquid pump 110 can extract the sample to be tested from the first liquid storage container 140 through the first valve port 1711. The second valve port 1712 of the valve group can also be selectively switched to the liquid adding channel 160, so that the sample to be tested can enter the liquid dispensing tank 150 through the liquid adding channel 160 and the liquid adding port 151. Through the mutual cooperation between the valve group and the controller, the second valve port 1712 of the valve group is switched differently with the first liquid outlet 1711 and the liquid dispensing port 151, thereby improving the intelligent control level of the pre-processing system for liquid detection and improving the detection efficiency of parameters.

[0042] The first liquid outlet 141 is connected to a liquid adding tube 142, which is a hard tube. It is understood that the first liquid storage container 140 is provided with a liquid adding tube 142, one end of which is connected to the first liquid outlet 141, and the other end of which is switchably connected to the liquid adding channel 160 and the second valve port 1712.

[0043] Optionally, a solenoid valve 200 is provided on the gas passage 130. The control device 170 is in communication with the solenoid valve 200. Opening the solenoid valve 200 activates the gas pump 120 to complete gas purge of the liquid pump 110 and the liquid adding passage 160. Closing the solenoid valve 200 cuts off the passage between the liquid pump port 111 and the gas pump port 121.

[0044] In another embodiment, one end of the gas channel 130 is connected to the liquid pump port 111 , one end of the gas channel 130 is connected to the first valve port 1711 , and the gas pump 120 is disposed on the gas channel 130 .

[0045] The gas pump 120 is disposed between the first valve port 1711 and the pump liquid port 111 , and the electromagnetic valve 200 may not be disposed, thereby simplifying the structure.

[0046] Specifically, the valve group includes a multi-way valve or a valve assembly consisting of multiple valves. Among them, the multi-way valve is a valve structure that integrates various directional valves and auxiliary valves with different functions into a valve body, with the advantages of compact structure, light weight and low pressure loss.

[0047] Optionally, the pre-processing system for liquid detection also includes a second liquid storage container 180, which is suitable for storing cleaning liquid, and the second liquid storage container 180 has a second liquid outlet 181; wherein, the controller is suitable for controlling the valve group so that the second valve port 1712 is connected to the second liquid outlet 181, so that the liquid pump 110 extracts the cleaning liquid and transports the cleaning liquid to the liquid adding channel 160 to clean the liquid adding channel 160.

[0048] In this embodiment, after the liquid preparation is completed, the liquid adding channel 160 can be cleaned with the cleaning liquid in the second liquid storage container 180, thereby cleaning more thoroughly and avoiding the occurrence of cross contamination problems in the liquid adding channel 160. The second liquid storage container 180 is a cleaning bottle, the second liquid outlet 181 is the bottle mouth, and the second liquid storage container 180 is also provided with a cleaning pipe 182. One end of the cleaning pipe 182 is connected to the second liquid outlet 181, and the other end of the cleaning pipe 182 and the liquid adding channel 160 are respectively switched to the second valve port 1712. When the cleaning pipe 182 is connected to the second valve port 1712, the cleaning liquid in the second liquid storage container 180 passes through the second liquid outlet 181 and the cleaning pipe 182. , the second valve port 1712, the first valve port 1711 enters the liquid pump 110, and then the second valve port 1712 can be switched to connect with the liquid adding channel 160, so that the cleaning liquid in the liquid pump 110 can enter the liquid distribution tank 150 through the pump liquid port 111, the first valve port 1711, the second valve port 1712, the liquid adding channel 160, and the liquid adding port 151 to complete the liquid cleaning of the liquid adding channel 160, and the waste liquid after cleaning enters the liquid distribution tank 150 and is discharged.

[0049] Optionally, the liquid mixing tank 150 is provided with a liquid discharge port 152, and the pre-processing system for liquid detection also includes a third liquid storage container 190, and the third liquid storage container 190 has a liquid inlet 191; wherein, the controller is suitable for controlling the valve group so that the second valve port 1712 is connected to the liquid discharge port 152, so that the liquid pump 110 extracts the waste liquid in the liquid mixing tank 150 and transports the waste liquid to the third liquid storage container 190.

[0050] In this embodiment, the third liquid storage container 190 is a waste liquid bottle, and the liquid inlet 191 is the bottle mouth. The liquid pump 110 extracts the waste liquid after the liquid cleaning in the liquid preparation tank 150 and discharges the waste liquid into the third liquid storage container 190 for storage. This can prevent the waste liquid discharged from the liquid preparation tank 150 from polluting the external environment, thereby being more environmentally friendly.

[0051] Optionally, the pre-processing system for liquid detection further includes a liquid discharge channel 300 , one end of the liquid discharge channel 300 is connected to the liquid discharge port 152 , and the other end of the liquid discharge channel 300 is selectively connected to the second valve port 1712 .

[0052] In this embodiment, the third liquid storage container 190 is further provided with a waste liquid pipe 192, one end of which is connected to the liquid inlet 181. The drain port 152 is connected to the drain channel 300, and the other end of the waste liquid pipe 192 and the drain channel 160 are respectively switched to connect with the second valve port 1712. When it is necessary to discharge the waste liquid after liquid cleaning in the liquid distribution tank 150, the second valve port 1712 is connected to the drain channel 160, and the liquid pump 110 pumps the waste liquid in the liquid distribution tank 150 through the drain port 152, the drain channel 160, the second valve port 1712, and the first valve port 1711 to the liquid pump 110. Then, the second valve port 1712 is switched to connect with the other end of the waste liquid pipe 192, and the liquid pump 190 discharges the waste liquid into the waste liquid pipe 192 and the third liquid storage container 190.

[0053] In another embodiment, before dispensing the liquid, the liquid pump 110 may be gas-purged first, and after dispensing the liquid, the gas pump 120 may be started first to complete the gas purge, and then the liquid purge may be started.

[0054] Specifically, the control device 170 is connected to the gas pump 120, which first expels the gas within the pump via the liquid pump 110. The control device 170 is then connected to the first liquid storage container 140, where the liquid pump 110 draws liquid from the first liquid storage container 140 into the liquid pump 110. The control device 170 then switches to connect to the liquid adding channel 160, pumping the liquid in the liquid pump 110 into the liquid dispensing reservoir 150, thereby adding the sample to be tested to the liquid dispensing reservoir 150. After the liquid in the liquid dispensing reservoir 150 has been measured, the solenoid valve 200 opens, the gas pump 120 is activated, and gas flows through the liquid adding channel 160, completing the gas purge of the pipeline. The control device 170 then switches to the second liquid storage container 180, and then switches to the second liquid storage container 180. The liquid pump 110 extracts the liquid from the second liquid storage container 180. After the extraction is completed, the control device 170 switches to the liquid adding channel 160. The liquid pump 110 pushes and discharges the cleaning liquid from the second liquid storage container 180 into the liquid adding channel 160, completing the liquid cleaning of the liquid adding channel 160. The control device 170 switches to the liquid discharge channel 300 of the liquid distribution tank 150 and cooperates with the liquid pump 110 to extract the liquid from the liquid distribution tank 150 into the liquid pump 110. The control device 170 then switches to the third liquid storage container 190. The liquid pump 110 discharges the liquid into the third liquid storage container 190. The liquid is discharged, completing the overall cleaning of the measuring cell and pipeline.

[0055] Obviously, the above embodiments are merely examples for clear description and are not intended to limit the implementation methods.

[0056] Those skilled in the art will readily appreciate that other variations or modifications may be made based on the above description. It is not necessary and impossible to exhaustively list all possible implementations. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A pre-processing system for liquid detection, characterized in that: include: A liquid pump (110) having a liquid pump port (111); A gas pump (120) having a gas pump port (121); a gas channel (130) connecting the liquid pump port (111) and the gas pump port (121); A control device (170) is communicatively connected to the liquid pump (110) and the gas pump (120), respectively. The control device (170) is adapted to control the gas channel (130) to connect the pump gas port (121) and the pump liquid port (111) to achieve gas washing of the liquid parameter detection channel.

2. The pre-processing system for liquid detection according to claim 1, characterized in that: The device further comprises a liquid preparation tank (150) and a first liquid storage container (140), wherein the first liquid storage container (140) is suitable for storing a sample to be tested, and the first liquid storage container (140) has a first liquid outlet (141), and the liquid preparation tank (150) is provided with a liquid addition port (151). The control device (170) comprises: A valve group having a first valve port (1711) and a second valve port (1712) that are interconnected, wherein the first valve port (1711) is connected to the liquid pump port (111); A controller is communicatively connected to the valve group, and the controller is suitable for controlling the valve group so that the second valve port (1712) is connected to the first liquid outlet (141), or the controller is suitable for controlling the valve group so that the second valve port (1712) is connected to the liquid filling port (151).

3. The pre-processing system for liquid detection according to claim 2, characterized in that: The valve group includes a multi-way valve or a valve assembly consisting of multiple valves.

4. The pre-processing system for liquid detection according to claim 2, characterized in that: The invention also includes a second liquid storage container (180), wherein the second liquid storage container (180) is suitable for storing cleaning liquid, and the second liquid storage container (180) has a second liquid outlet (181); the liquid parameter detection channel includes a liquid adding channel (160), and the liquid adding channel (160) connects the liquid adding port (151) and the first liquid outlet (141); wherein the controller is suitable for controlling the valve group so that the second valve port (1712) is connected to the second liquid outlet (181), so that the liquid pump (110) extracts the cleaning liquid and transports the cleaning liquid to the liquid adding channel (160) to clean the liquid adding channel (160).

5. The liquid detection pre-processing system according to claim 4, characterized in that: The liquid dispensing tank (150) is provided with a liquid discharge port (152), and the pre-processing system for liquid detection further comprises a third liquid storage container (190), and the third liquid storage container (190) has a liquid inlet (191); wherein the controller is suitable for controlling the valve group so that the second valve port (1712) is connected to the liquid discharge port (152), so that the liquid pump (110) extracts the waste liquid in the liquid dispensing tank (150) and transports the waste liquid to the third liquid storage container (190).

6. The pre-processing system for liquid detection according to claim 5, characterized in that: The pre-processing system for liquid detection further comprises a liquid discharge channel (300), one end of which is connected to the liquid discharge port (152), and the other end of which is selectively connected to the second valve port (1712).

7. The pre-processing system for liquid detection according to any one of claims 2 to 6, characterized in that: One end of the gas channel (130) is connected to the pump liquid port (111), one end of the gas channel (130) is connected to the first valve port (1711), and the gas pump (120) is provided on the gas channel (130).

8. The pre-processing system for liquid detection according to any one of claims 1 to 6, characterized in that: A solenoid valve (200) is provided on the gas channel, and the control device (170) is communicatively connected to the solenoid valve (200).

9. The pre-processing system for liquid detection according to any one of claims 1 to 6, characterized in that: The liquid pump (110) is a plunger pump or a peristaltic pump.

10. The pre-processing system for liquid detection according to any one of claims 2 to 6, characterized in that: The first liquid outlet (141) is connected to a liquid adding pipe (142), and the liquid adding pipe (142) is a hard pipe.

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