Water sample analysis pretreatment device

Abstract

The utility model discloses a water sample analysis pretreatment device which comprises an ultrafiltration membrane box communicated with a water inlet pipe and a box body connected with the ultrafiltration membrane box, and the box body is communicated with a pure water box; a self-priming pump is arranged on the water inlet pipe; a quantifying cup communicated with the ultrafiltration membrane box through a first diaphragm pump is arranged in the box body; a water outlet pipe opening in the bottom of the quantifying cup faces an upper opening of the mixing cup; a mixing cup is arranged in the box body and is communicated with an external measuring instrument through a pipeline. A water inlet of the pure water tank is connected with a water purifier through a pipeline, an electric valve is arranged on the pipeline between the pure water tank and the water purifier, a water outlet of the pure water tank is communicated with a quantitative cup through a pipeline, a second diaphragm pump is arranged on the pipeline between the pure water tank and the quantitative cup, and the self-priming pump, the first diaphragm pump, the water purifier, the electric valve and the second diaphragm pump are all controlled by the PLC. According to the utility model, the automation and high precision of water sample pretreatment are realized, the real-time performance and effectiveness of water sample measurement are guaranteed, and the manual maintenance cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of water sample analysis equipment, specifically relating to a water sample analysis pretreatment device. Background Technology

[0002] In fields such as environmental monitoring, industrial production, and water quality analysis, water sample pretreatment is a crucial step in ensuring the accuracy of measurement results. When the concentration of a target substance in a water sample exceeds the range of the measuring instrument, dilution pretreatment is necessary to reduce the concentration to a measurable range.

[0003] Traditional water sample pretreatment devices generally suffer from the following problems:

[0004] Firstly, there is a problem of insufficient dilution accuracy. Existing devices mostly rely on manual adjustment of valves or pump running time, making it difficult to accurately control the ratio of water sample to dilution water, resulting in a large deviation in dilution ratio and affecting the reliability of measurement results.

[0005] Secondly, there is the problem of low automation. Water sample extraction, filtration, and mixing require manual intervention, which is cumbersome and inefficient. The cost of manual maintenance is high, and it cannot meet the needs of continuous monitoring or large-scale testing. Utility Model Content

[0006] The purpose of this invention is to provide a water sample analysis pretreatment device to solve the technical defects of existing water sample pretreatment devices, such as insufficient dilution accuracy, low degree of automation, and high manual maintenance costs.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A water sample analysis pretreatment device includes an ultrafiltration membrane chamber connected to an inlet pipe and a housing connected to the ultrafiltration membrane chamber, which is connected to a pure water tank. A self-priming pump is installed on the inlet pipe. Inside the housing is a metering cup connected to the ultrafiltration membrane chamber via a first diaphragm pump. The bottom outlet of the metering cup is open towards the top of a mixing cup, and a second vent valve is installed on the bottom outlet pipe of the metering cup. Inside the housing is a mixing cup, which is connected to an external measuring instrument via a pipe, and a peristaltic pump is installed on this pipe. The inlet of the pure water tank is connected to a pure water machine via a pipe. An electric valve is installed on the pipe between the pure water tank and the pure water machine. The outlet of the pure water tank is connected to the metering cup via a pipe, and a second diaphragm pump is installed on the pipe between the pure water tank and the metering cup. The self-priming pump, the first diaphragm pump, the pure water machine, the electric valve, and the second diaphragm pump are all controlled by a PLC controller.

[0009] As a further embodiment of this invention, the device also includes a drain pipe, which is connected to the ultrafiltration membrane box, the metering cup, and the mixing cup via pipes.

[0010] The system includes a first vent valve on the pipe between the drain pipe and the ultrafiltration membrane box, a third diaphragm pump on the pipe between the drain pipe and the metering cup, and a third vent valve on the pipe between the drain pipe and the mixing cup. The first vent valve, the third diaphragm pump, and the third vent valve are all controlled by a PLC controller.

[0011] As a further embodiment of this utility model, a self-priming pump controlled by a PLC controller is provided on the water inlet pipe, and a manual valve is also provided on the water inlet pipe.

[0012] As a further embodiment of this utility model, an air pump is provided inside the housing. The air pump is connected to the mixing cup through a pipe, and a homogenization valve and a check valve are provided on the pipe. The check valve is located between the air pump and the homogenization valve.

[0013] As a preferred embodiment of this utility model, both the ultrafiltration membrane box and the metering cup are provided with overflow ports on their upper sides, and the overflow ports are connected to the drain pipes through pipes.

[0014] As a preferred embodiment of this utility model, the first vent valve, the second vent valve, and the third vent valve are respectively connected to time-controlled switches, and the time-controlled switches are all controlled by a PLC controller.

[0015] Compared with existing technologies, the water sample pretreatment device of this invention has the following advantages:

[0016] 1. This utility model employs a PLC controller that works in conjunction with a metering cup and multiple pumps to precisely control the injection volume of water sample and pure water according to a preset dilution ratio, avoiding errors from manual adjustment and ensuring that the water sample concentration meets the instrument's range requirements. Furthermore, from water sample extraction, ultrafiltration membrane filtration, quantitative dilution to mixing cup cleaning, everything is uniformly controlled by the PLC without manual intervention, significantly improving continuous monitoring efficiency. This achieves automated and high-precision water sample pretreatment with low manual maintenance costs, providing reliable support for water sample analysis.

[0017] 2. This utility model, by adding drainage pipes that are connected to the ultrafiltration membrane box, the metering cup, and the mixing cup respectively, and in conjunction with the first drain valve, the third diaphragm pump, and the third drain valve, can promptly discharge impurities and wastewater from the ultrafiltration membrane box, excess water sample from the metering cup, and water sample or cleaning wastewater from the mixing cup after measurement, ensuring the orderly discharge of liquids in the system and the normal operation of the device. Moreover, these components are all controlled by a PLC controller, further improving the level of automation.

[0018] 3. This utility model uses an air pump inside the chamber to connect with a mixing cup via a homogenization valve and a check valve. The air pump injects air into the mixing cup, which, together with the homogenization valve, allows the water sample and dilution water to be mixed more evenly. The check valve prevents gas backflow, ensuring stable system operation and helping to improve the accuracy of water sample measurement. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the installation structure of an embodiment of the present utility model;

[0021] Figure 2 This is a flowchart of an embodiment of the present utility model.

[0022] Figure label:

[0023] 1. Ultrafiltration membrane box; 2. Inlet pipe; 3. Self-priming pump; 4. Metering cup; 5. First diaphragm pump; 6. Drain pipe; 7. First vent valve; 8. Mixing cup; 9. Second vent valve; 10. Third vent valve; 11. Pure water tank; 12. Pure water machine; 13. Electric valve; 14. Second diaphragm pump; 15. Air pump; 16. Homogenization valve; 17. Check valve; 18. Peristaltic pump; 19. Third diaphragm pump; 20. Box body; 21. Manual valve. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0025] In the description of the embodiments of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0026] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0027] See appendix Figures 1-2As shown, the water sample analysis pretreatment device of this utility model embodiment includes an ultrafiltration membrane box 1, a box body 20, a metering cup 4, and a mixing cup 8. The inlet of the ultrafiltration membrane box 1 is fixedly connected to a water inlet pipe 2, and a self-priming pump 3 is installed on the water inlet pipe 2. The metering cup 4 is located inside the box body 20 and is connected to the outlet of the ultrafiltration membrane box 1 through a pipe, and a first diaphragm pump 5 is installed on the pipe thereon. The mixing cup is located inside the box body 20, and the bottom outlet of the metering cup 4 is open to the upper part of the mixing cup 8, and a second drain valve 9 is installed on the bottom outlet pipe of the metering cup 4. A pure water tank 11 is located on one side of the box body 20. The inlet of the pure water tank 11 is connected to a pure water machine 12 through a pipe. An electric valve 13 is installed on the pipe between the pure water tank 11 and the pure water machine 12. The outlet of the pure water tank 11 is connected to the metering cup 4 through a pipe, and a second diaphragm pump 14 is installed on the pipe between the pure water tank 11 and the metering cup 4. The self-priming pump 3, the first diaphragm pump 5, the pure water machine 12, the electric valve 13, and the second diaphragm pump 14 are all controlled by a PLC controller; among them, the mixing cup 8 is connected to an external measuring instrument through a pipeline, and a peristaltic pump 18 is installed on the pipeline.

[0028] The above technical solution uses a self-priming pump 3 and an ultrafiltration membrane box 1 to extract and initially filter water samples. The first diaphragm pump 5 delivers the filtered water sample to the metering cup 4. The second diaphragm pump 14 draws pure water from the pure water tank 11 to the metering cup 4 to dilute the water sample. The PLC controller controls all components in a unified manner. The device has a high degree of automation and can accurately control the operation of each link. The mixing cup 8 is connected to the measuring instrument through a peristaltic pump 18 to ensure that the diluted water sample can be accurately delivered to the instrument for measurement.

[0029] The water sample analysis pretreatment device of this utility model embodiment also includes a drain pipe 6, which is connected to the ultrafiltration membrane box 1, the metering cup 4 and the mixing cup 8 through pipes; wherein, a first vent valve 7 is provided on the pipe between the drain pipe 6 and the ultrafiltration membrane box 1, a third diaphragm pump 19 is provided on the pipe between the drain pipe 6 and the metering cup 4, and a third vent valve 10 is provided on the pipe between the drain pipe 6 and the mixing cup 8; the first vent valve 7, the third diaphragm pump 19 and the third vent valve 10 are all controlled by a PLC controller.

[0030] The above technical solution connects the added drain pipe 6 to the ultrafiltration membrane tank 1, the metering cup 4, and the mixing cup 8 respectively. With the help of the first drain valve 7, the third diaphragm pump 19, and the third drain valve 10, the impurity wastewater in the ultrafiltration membrane tank 1, the excess water sample in the metering cup 4, and the measurement water sample or cleaning wastewater in the mixing cup 8 can be discharged in a timely manner, ensuring the orderly discharge of liquids in the device and the normal operation of the device. Moreover, all components are controlled by the PLC controller, further improving the level of automation.

[0031] The water inlet pipe 2 is equipped with a manual valve 21, which can be used to manually control the flow of water sample during equipment debugging, maintenance or when the automatic control system malfunctions, making maintenance easier and also helping to adjust the flow rate of water sample entering the device.

[0032] An air pump 15 is installed inside the housing 20. The air pump 15 is connected to the inside of the mixing cup 8 via a pipe, and a homogenization valve 16 and a check valve 17 are installed on the pipe. The check valve 17 is located between the air pump 15 and the homogenization valve 16. When the air pump 15 injects air into the mixing cup 8, it works with the homogenization valve 16 to make the water sample and dilution water mix better and more evenly. The check valve 17 prevents gas backflow, ensuring stable operation of the device and helping to improve the accuracy of water sample measurement.

[0033] Both the ultrafiltration membrane box 1 and the metering cup 4 are equipped with overflow ports on their upper sides, and the overflow ports are connected to the drain pipe 6 through pipes to ensure that excess water is discharged in time when there is too much water in the device, preventing liquid from overflowing and damaging the equipment, and ensuring the safe and stable operation of the device.

[0034] The first vent valve 7, the second vent valve 9, and the third vent valve 10 are each connected to a time control switch, and each time control switch is controlled by a PLC controller. When in use, the valves can be automatically opened or closed according to the set time to realize timed drainage or venting operations, reduce manual intervention, and improve the automation and intelligence of the device operation.

[0035] As is well known to those skilled in the art, the working principles and wiring methods of the self-priming pump 3, the first diaphragm pump 5, the first vent valve 7, the second vent valve 9, the third vent valve 10, the pure water machine 12, the electric valve 13, the second diaphragm pump 14, the air pump 15, the homogenizing valve 16, the check valve 17, the peristaltic pump 18, and the third diaphragm pump 19 are common knowledge and are all conventional methods or common common sense. They will not be described in detail here. Those skilled in the art can arbitrarily select and match their models according to their needs or convenience.

[0036] In this embodiment of the invention, an external water sample enters the device through the inlet pipe 2. The manual valve 21 can be manually adjusted or the water flow can be cut off. The self-priming pump 3 starts to draw the water sample into the ultrafiltration membrane tank 1. The water sample passes through the ultrafiltration membrane in the ultrafiltration membrane tank 1 to remove impurities. The cleaned water sample is then transported to the metering cup 4 by the first diaphragm pump 5. The PLC controller controls the number of times the first diaphragm pump 5 starts according to the set dilution ratio to inject the metering sample into the metering cup 4. The second diaphragm pump 14 draws a metering amount of pure water from the pure water tank 11 and injects it into the metering cup 4 to mix with the water sample, resulting in a mixed liquid. The second vent valve 9 at the bottom of the metering cup 4 is opened, and the mixed liquid flows into the mixing cup 8. The air pump 15 injects air into the mixing cup through the homogenization valve 16 to assist the water sample and pure water in mixing thoroughly. The check valve 17 prevents liquid backflow. The peristaltic pump 18 delivers the uniformly mixed water sample to the measuring instrument for detection to ensure that the concentration meets the instrument's range.

[0037] During automatic sludge discharge and cleaning, the PLC controller triggers a timer switch during mixing cup cleaning, draining residual liquid from mixing cup 8 through the third vent valve 10. Simultaneously, the second diaphragm pump 14 draws pure water from the pure water tank 11 to rinse the mixing cup, repeating this process multiple times until clean. During sludge discharge from the ultrafiltration membrane tank, the first vent valve 7 opens periodically to discharge impurities and wastewater from the bottom of the ultrafiltration membrane tank 1. During metering cup emptying, the third diaphragm pump 19 starts, draining the remaining liquid from metering cup 4 through drain pipe 6.

[0038] When the overflow outlets of the ultrafiltration membrane box 1 and the metering cup 4 are too high, the excess liquid will be automatically discharged into the drain pipe 6 to prevent overflow.

[0039] The foregoing has shown and described the basic principles of the present invention. The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Any modifications, equivalent substitutions, and improvements made within the scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A water sample analysis pre-treatment apparatus, characterised in that: The utility model provides a kind of water purification system, including the ultrafiltration membrane box (1) being communicated with inlet pipe (2) and the box (20) being connected with ultrafiltration membrane box (1), the box (20) is communicated with pure water tank (11);The inlet pipe (2) is equipped with self-priming pump (3);The box (20) inside is equipped with the dosing cup (4) being communicated with the ultrafiltration membrane box (1) by first diaphragm pump (5), dosing cup (4) bottom outlet pipe is directed to the upper part of mixed cup (8) and is open, dosing cup (4) bottom outlet pipeline is equipped with second emptying valve (9);The box (20) inside is equipped with mixed cup (8), and the mixed cup (8) is communicated with external measuring instrument by pipeline, and the pipeline is equipped with peristaltic pump (18) at this place; The water inlet of the pure water tank (11) is connected with a water purifier (12) by a pipeline, and an electric valve (13) is arranged on the pipeline between the pure water tank (11) and the water purifier (12). The water outlet of the pure water tank (11) is communicated with the dosing cup (4) by a pipeline, and a second diaphragm pump (14) is arranged on the pipeline between the pure water tank (11) and the dosing cup (4). The self-priming pump (3), the first diaphragm pump (5), the water purifier (12), the electric valve (13) and the second diaphragm pump (14) are controlled by a PLC controller.

2. The water sample analysis pre-treatment apparatus according to claim 1, characterized in that: The drainage pipe (6) is communicated with the ultrafiltration membrane box (1), the dosing cup (4) and the mixed cup (8) respectively by pipelines. The first emptying valve (7) is arranged on the pipeline between the drainage pipe (6) and the ultrafiltration membrane box (1), the third diaphragm pump (19) is arranged on the pipeline between the drainage pipe (6) and the dosing cup (4), and the third emptying valve (10) is arranged on the pipeline between the drainage pipe (6) and the mixed cup (8). The first emptying valve (7), the third diaphragm pump (19) and the third emptying valve (10) are controlled by a PLC controller.

3. The water sample analysis pre-treatment apparatus of claim 2, wherein: The inlet pipe (2) is provided with a self-priming pump (3) controlled by a PLC controller, and a manual valve (21) is arranged on the inlet pipe (2).

4. The water sample analysis pre-treatment apparatus according to claim 3, characterized in that: An air pump (15) is arranged in the box (20), and the air pump (15) is communicated with the mixed cup (8) by a pipeline. A homogenizing valve (16) and a check valve (17) are arranged on the pipeline at this position, and the check valve (17) is located between the air pump (15) and the homogenizing valve (16).

5. The water sample analysis pretreatment device of claim 2, wherein: Overflow outlets are arranged on the upper sides of the ultrafiltration membrane box (1) and the dosing cup (4), and the overflow outlets are communicated with the drainage pipe (6) by pipelines.

6. The water sample analysis pretreatment device of claim 2, wherein: The first emptying valve (7), the second emptying valve (9) and the third emptying valve (10) are respectively connected with time control switches, and the time control switches are controlled by a PLC controller.

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