A portable detection device for heavy metals in farmland irrigation water

Abstract

This utility model provides a portable heavy metal detection device for farmland irrigation water, relating to the technical field of water quality testing equipment. It includes a housing with a sample injection mechanism inside. The sample injection mechanism includes a detection chamber located inside the housing. A sample storage box is fixedly connected to the inner wall of the housing, and a sampling pump is installed inside the sample storage box. The outlet of the sampling pump is fixedly connected to a sample delivery tube, the right end of which passes through the sample storage box and extends into the housing. A quantitative tube is fixedly connected to the right end of the sample delivery tube. This portable heavy metal detection device for farmland irrigation water solves the problem that most existing portable heavy metal detection devices for farmland irrigation water rely on manual sampling. Since manual operation makes it difficult to guarantee the absolute accuracy of the sample volume each time, it easily leads to deviations in the test results. Furthermore, during manual sampling, the sample comes into contact with the external environment, increasing the risk of contamination. This device improves the reliability of the test results.

Description

Technical Field

[0001] This utility model relates to a portable heavy metal detection device, specifically a portable heavy metal detection device for farmland irrigation water, belonging to the technical field of water quality testing equipment. Background Technology

[0002] In agricultural production, the quality of farmland irrigation water is directly related to the growth, yield, and quality and safety of agricultural products. Heavy metal pollution is one of the key factors affecting the quality of farmland irrigation water.

[0003] Most existing portable heavy metal detection devices for farmland irrigation water rely on manual sampling, which greatly increases the workload of testing personnel. Because manual operation makes it difficult to guarantee the absolute accuracy of the sample volume for each sample, it easily leads to deviations in the test results. Furthermore, during manual sampling, the sample comes into contact with the external environment, increasing the risk of contamination and reducing the reliability of the test results. Therefore, this paper proposes a portable heavy metal detection device for farmland irrigation water. Utility Model Content

[0004] This invention proposes a portable heavy metal detection device for farmland irrigation water to solve the problem of relying on manual sampling in the prior art.

[0005] This utility model is achieved through the following technical solution: a portable heavy metal detection device for farmland irrigation water, including a device housing, and a sample injection mechanism is provided inside the device housing;

[0006] The sampling mechanism includes a detection chamber located inside the equipment housing. A sample storage box is fixedly connected to the inner wall of the equipment housing. A sampling pump is installed inside the sample storage box. A sample delivery tube is fixedly connected to the outlet of the sampling pump. The right end of the sample delivery tube passes through the sample storage box and extends into the equipment housing. A quantitative tube is fixedly connected to the right end of the sample delivery tube. The bottom end of the quantitative tube passes through the detection chamber and extends into the detection chamber. A flow sensor and a first solenoid valve are fixedly connected to the outer surface of the quantitative tube. A PLC controller is fixedly connected to the inner wall of the equipment housing. The PLC controller is electrically connected to the sampling pump, the flow sensor, and the first solenoid valve via wires.

[0007] The device housing contains a detection component.

[0008] The left side of the sample storage box is fixedly connected to a water inlet pipe, the right end of which penetrates the equipment housing and extends to the left side of the equipment housing, and a sealing cap is fitted on the outer surface of the water inlet pipe.

[0009] The upper surface of the sample storage box is hinged to a sealing cover, and the upper surface of the sealing cover is fixedly connected to an auxiliary handle.

[0010] A support block is fixedly connected to the outer surface of the sampling pump, and the right side of the support block is fixedly connected to the inner wall of the sample storage box.

[0011] A storage battery is fixedly connected to the inner wall of the equipment housing. The storage battery is electrically connected to the sampling pump, flow sensor, first solenoid valve and PLC controller through wires.

[0012] The detection assembly includes a reaction cell, which is fixedly connected to the inner wall of the detection chamber. A heavy metal ion selective electrode sensor is fixedly connected to the inner wall of the reaction cell. A drain pipe is fixedly connected to the bottom surface of the reaction cell. The right end of the drain pipe passes through the equipment housing and extends to the right side of the equipment housing. A second solenoid valve is fixedly connected to the outer surface of the drain pipe.

[0013] This utility model provides a portable device for detecting heavy metals in farmland irrigation water, which has the following beneficial effects:

[0014] This portable heavy metal detection device for farmland irrigation water comprises a housing, a detection chamber, a sample storage box, a sampling pump, a sample delivery tube, a quantitative tube, a flow sensor, a first solenoid valve, a PLC controller, and detection components. The sampling pump and sample delivery tube work together to deliver farmland irrigation water samples from the sample storage box to the quantitative tube. The flow sensor detects the amount of sample entering the quantitative tube. Once the appropriate amount is reached, the flow sensor sends a signal to the PLC controller via a wire. The PLC controller then shuts down the sampling pump and simultaneously opens the first solenoid valve, discharging the farmland irrigation water sample from the quantitative tube into the detection chamber for testing. This device solves the problem that most existing portable heavy metal detection devices for farmland irrigation water rely on manual sampling, which greatly increases the workload of testing personnel. Furthermore, manual operation makes it difficult to guarantee the absolute accuracy of the sample volume each time, easily leading to deviations in the test results. Moreover, during manual sampling, the sample comes into contact with the external environment, increasing the risk of contamination. This device improves the reliability of the test results. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the detection cavity structure of this utility model;

[0017] Figure 3 This is a cross-sectional view of the sample storage box of this utility model;

[0018] Figure 4 This is a cross-sectional view of the equipment housing of this utility model.

[0019] Explanation of reference numerals in the attached figures

[0020] 1. Equipment casing;

[0021] 2. Sample injection mechanism; 201. Detection chamber; 202. Sample storage box; 203. Sampling pump; 204. Sample delivery tube; 205. Quantitative tube; 206. Flow sensor; 207. First solenoid valve; 208. PLC controller;

[0022] 3. Detection components; 301. Reaction cell; 302. Heavy metal ion selective electrode sensor; 303. Drain pipe; 304. Second solenoid valve;

[0023] 4. Water inlet pipe; 5. Sealing cover; 6. Sealing cover; 7. Auxiliary handle; 8. Support block; 9. Battery. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0025] Please see Figures 1-4 This utility model provides a portable heavy metal detection device for farmland irrigation water, including a device housing 1, and a sample injection mechanism 2 is provided inside the device housing 1;

[0026] The sample introduction mechanism 2 includes a detection chamber 201, which is located inside the equipment housing 1. A sample storage box 202 is fixedly connected to the inner wall of the equipment housing 1. A water inlet pipe 4 is fixedly connected to the left side of the sample storage box 202. The right end of the water inlet pipe 4 passes through the equipment housing 1 and extends to the left side of the equipment housing 1. A sealing cover 5 is fitted on the outer surface of the water inlet pipe 4. The water inlet pipe 4 can provide an auxiliary function for the sample storage box 202, increasing the convenience of adding farmland irrigation water samples into the sample storage box 202. The sealing cover 5 can ensure the airtightness of the water inlet pipe 4 and prevent water from splashing out through the water inlet pipe 4.

[0027] The sample storage box 202 is equipped with a sampling pump 203. The outlet of the sampling pump 203 is fixedly connected to a sample delivery pipe 204. A sealing cover 6 is movably hinged to the upper surface of the sample storage box 202. An auxiliary handle 7 is fixedly connected to the upper surface of the sealing cover 6. The sealing cover 6 can close the sample storage box 202 and can also be opened by pulling the auxiliary handle 7 to facilitate the discharge of farmland irrigation water samples from the sample storage box 202.

[0028] The right end of the sample delivery tube 204 passes through the sample storage box 202 and extends into the interior of the equipment housing 1. The right end of the sample delivery tube 204 is fixedly connected to a quantitative tube 205. A support block 8 is fixedly connected to the outer surface of the sampling pump 203. The right side of the support block 8 is fixedly connected to the inner wall of the sample storage box 202. The support block 8 can fix the sampling pump 203, which can increase the connection between the sampling pump 203 and the sample storage box 202, improve the stability of the sampling pump 203 in use, and increase the stability of the device.

[0029] The bottom end of the quantitative tube 205 penetrates through the detection chamber 201 and extends into the interior of the detection chamber 201. A flow sensor 206 and a first solenoid valve 207 are fixedly connected to the outer surface of the quantitative tube 205. A PLC controller 208 is fixedly connected to the inner wall of the equipment housing 1. The PLC controller 208 is electrically connected to the sampling pump 203, the flow sensor 206, and the first solenoid valve 207 via wires. A storage battery 9 is fixedly connected to the inner wall of the equipment housing 1. The storage battery 9 is electrically connected to the sampling pump 203, the flow sensor 206, the first solenoid valve 207, and the PLC controller 208 via wires. The storage battery 9 can provide power to the sampling pump 203, the flow sensor 206, the first solenoid valve 207, and the PLC controller 208 respectively, and can also be quickly charged via a USB interface.

[0030] The equipment housing 1 is equipped with a detection component 3, which includes a reaction cell 301. The reaction cell 301 is fixedly connected to the inner wall of the detection chamber 201. A heavy metal ion selective electrode sensor 302 is fixedly connected to the inner wall of the reaction cell 301. A drain pipe 303 is fixedly connected to the bottom surface of the reaction cell 301. The right end of the drain pipe 303 passes through the equipment housing 1 and extends to the right side of the equipment housing 1. A second solenoid valve 304 is fixedly connected to the outer surface of the drain pipe 303. The farmland irrigation water sample is detected by the reaction cell 301 and the heavy metal ion selective electrode sensor 302. The farmland irrigation water sample is discharged after detection by the drain pipe 303 and the second solenoid valve 304. At the same time, the PLC controller 208 and the battery 9 are electrically connected to the heavy metal ion selective electrode sensor 302 and the second solenoid valve 304 through wires, respectively.

[0031] In use, the present invention is as follows: First, the storage battery 9 is fully charged and provides power to multiple electrical components. The sealing cover 6 is opened by the auxiliary handle 7, and the collected farmland irrigation water sample is poured into the sample storage box 202. Then, the sealing cover 6 is closed tightly. The PLC controller 208 sets parameters such as the injection speed and injection volume according to the detection requirements. When detection is required, the sampling pump 203 is started by the PLC controller 208. The sample in the sample storage box 202 is transported to the quantitative tube 205 through the sample delivery tube 204 at the preset speed. At this time, the flow sensor 206 at the inlet of the quantitative tube 205 starts to work, monitors the water sample flow rate in real time and feeds it back to the PLC controller 208. When the liquid level reaches the appropriate level, the PLC controller 208 sends a stop command to the sampling pump 203 and opens the first solenoid valve 207 at the outlet of the quantitative tube 205, thereby rapidly flowing the sample in the quantitative tube 205 into the reaction tank 301.

[0032] After the sample enters the reaction cell 301, the heavy metal ion selective electrode sensor 302 detects the heavy metal ions in the sample and converts the detected signal into an electrical signal, which is then transmitted to the PLC controller 208. The PLC controller 208 analyzes and processes the electrical signal to calculate the concentration of various heavy metal ions in the sample. After the detection is completed, the PLC controller 208 automatically controls the second solenoid valve 304 to open, allowing the post-detection water in the reaction cell 301 to flow out through the drain pipe 303. After the discharge is completed, the second solenoid valve 304 automatically closes, realizing the function of automatic sample introduction, preventing errors caused by manual sample introduction, and increasing the effectiveness of the portable heavy metal detection device for farmland irrigation water.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A portable device for detecting heavy metals in agricultural irrigation water, comprising a device housing (1), characterized in that: The device housing (1) is equipped with a sample injection mechanism (2); The sampling mechanism (2) includes a detection chamber (201), which is located inside the equipment housing (1). A sample storage box (202) is fixedly connected to the inner wall of the equipment housing (1). A sampling pump (203) is installed inside the sample storage box (202). A sample delivery pipe (204) is fixedly connected to the outlet end of the sampling pump (203). The right end of the sample delivery pipe (204) passes through the sample storage box (202) and extends into the equipment housing (1). The right end of the sample delivery pipe (204) is fixedly connected to the inner wall of the equipment housing (1). A quantitative tube (205) is connected to the device housing (1). The bottom end of the quantitative tube (205) passes through the detection chamber (201) and extends into the interior of the detection chamber (201). A flow sensor (206) and a first solenoid valve (207) are fixedly connected to the outer surface of the quantitative tube (205). A PLC controller (208) is fixedly connected to the inner wall of the device housing (1). The PLC controller (208) is electrically connected to the sampling pump (203), the flow sensor (206) and the first solenoid valve (207) through wires. The detection component (3) is installed inside the housing (1) of the device. 2.The portable device for detecting heavy metals in farmland irrigation water according to claim 1, characterized in that: The left side of the sample storage box (202) is fixedly connected to a water inlet pipe (4). The right end of the water inlet pipe (4) passes through the equipment housing (1) and extends to the left side of the equipment housing (1). A sealing cover (5) is fitted on the outer surface of the water inlet pipe (4). 3.The portable device for detecting heavy metal in farmland irrigation water according to claim 1, wherein: The upper surface of the sample storage box (202) is hinged to a sealing cover (6), and the upper surface of the sealing cover (6) is fixedly connected to an auxiliary handle (7).

4. The portable device for detecting heavy metals in farmland irrigation water according to claim 1, characterized in that: A support block (8) is fixedly connected to the outer surface of the sampling pump (203), and the right side of the support block (8) is fixedly connected to the inner wall of the sample storage box (202).

5. The portable device for detecting heavy metals in farmland irrigation water according to claim 1, characterized in that: A storage battery (9) is fixedly connected to the inner wall of the equipment housing (1). The storage battery (9) is electrically connected to the sampling pump (203), the flow sensor (206), the first solenoid valve (207) and the PLC controller (208) respectively through wires. 6.The portable device for detecting heavy metal in farmland irrigation water according to claim 1, wherein: The detection component (3) includes a reaction cell (301), which is fixedly connected to the inner wall of the detection chamber (201). A heavy metal ion selective electrode sensor (302) is fixedly connected to the inner wall of the reaction cell (301). A drain pipe (303) is fixedly connected to the bottom surface of the reaction cell (301). The right end of the drain pipe (303) penetrates the equipment housing (1) and extends to the right side of the equipment housing (1). A second solenoid valve (304) is fixedly connected to the outer surface of the drain pipe (303).

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