Quantitative sampling device for COD (Chemical Oxygen Demand) water quality detection

Abstract

The utility model provides a COD (Chemical Oxygen Demand) water quality detection quantitative sampling device, and relates to the technical field of water quality detection quantitative sampling devices, the COD water quality detection quantitative sampling device comprises a first fixing plate, a moving assembly is arranged in the first fixing plate, the moving assembly comprises a motor, the output end of the motor is fixedly connected with an output shaft, and the output shaft is fixedly connected with a water outlet; and one end of the output shaft is fixedly connected with a screw rod. According to the device, the sliding plate is placed in the corresponding scale sliding groove, the motor is started to drive the connecting rod to move, the connecting rod can drive the piston to move in the sampling pipe so as to suck water, when the connecting rod passes through the sliding plate, the inductor receives a signal at the moment, rotation of the motor is stopped, and the water is collected. The sampling scale is preset by a worker, and then the motor is started to extract quantitative water, so that personal errors are avoided, the accuracy of the sampling volume is ensured, and the accuracy of the COD value is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of quantitative sampling devices for water quality testing, and in particular to a quantitative sampling device for COD water quality testing. Background Technology

[0002] A COD water quality quantitative sampling device is a specialized device used in water quality testing to accurately measure a certain volume of water sample for COD analysis. It is mainly used to ensure the accuracy of the sample volume so as to determine the organic matter content in the water in subsequent tests.

[0003] In the existing technology, existing devices usually use pipettes for quantitative sampling of COD water quality. When using a pipette to draw water samples, the operator needs to have good eyesight and steady hand operation to ensure that the liquid level is accurately adjusted to the scale line. However, relying on the individual operation of the operator to judge whether the liquid level has reached the scale line will result in a certain degree of human error. Drawing too much or too little water sample will lead to inaccurate sampling volume, thus affecting the accuracy of COD value. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the existing technology that relies on individual operation by staff to judge whether the liquid level has reached the scale line, which may lead to certain human errors, resulting in inaccurate sampling volume and affecting the accuracy of COD value. Therefore, a quantitative sampling device for COD water quality detection is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a COD water quality quantitative sampling device, comprising a first fixed plate, a moving component disposed inside the first fixed plate, the moving component comprising a motor, an output shaft fixedly connected to the output end of the motor, a lead screw fixedly connected to one end of the output shaft, a connecting rod threadedly connected to the outer surface of the lead screw, and a graduated groove formed on the outer surface of the first fixed plate.

[0006] Preferably, the inner wall of the scale groove is slidably fitted with a sliding plate, and one end of the lead screw is movably embedded in the inner wall of the first fixed plate.

[0007] Preferably, a limiting shaft is fixedly embedded in the inner wall of the first fixing plate, and the outer surface of the limiting shaft slides against the inner wall of the connecting rod.

[0008] Preferably, the inner wall of the skateboard is provided with a sensor, and a shelf is fixedly connected to one side of the inner wall of the first fixed plate.

[0009] Preferably, the motor is disposed on the outer surface of the shelf, and a fixing rod is fixedly connected to the inner wall of the other side of the first fixing plate.

[0010] Preferably, a sampling tube is fixedly connected to the outer surface of the fixing rod, and a piston is fitted against the inner wall of the sampling tube.

[0011] Preferably, a movable shaft is fixedly connected to the outer surface of the piston, and the outer surface of the movable shaft is fixedly connected to the outer surface of the connecting rod.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, the device is equipped with graduated grooves. The slide plate is placed in the corresponding graduated groove, and the motor is started to rotate, which drives the connecting rod to move. The movement of the connecting rod drives the piston to move in the sampling tube to absorb water. When the connecting rod passes the slide plate, the sensor receives a signal and stops the motor. The sampling scale is preset by the staff, and then the motor is started to extract a quantitative amount of water, thereby avoiding human error, ensuring the accuracy of the sampling volume, and thus ensuring the accuracy of the COD value.

[0014] 2. In this utility model, the device is equipped with a piston, which moves inside the sampling tube to absorb water. The piston device can operate inside the closed sampling tube, thereby reducing the contact between the water sample and the outside air and impurities, and reducing external pollution. Attached Figure Description

[0015] Figure 1 A frontal perspective view of a COD water quality quantitative sampling device is provided for this utility model;

[0016] Figure 2 This utility model provides a frontal perspective view of the connecting rod of a quantitative sampling device for COD water quality detection.

[0017] Figure 3 This utility model provides a three-dimensional cross-sectional view of the sampling tube portion of a quantitative sampling device for COD water quality testing.

[0018] Figure 4 A frontal perspective perspective view of the scale slide groove of the COD water quality quantitative sampling device proposed in this utility model;

[0019] Figure 5 The present invention provides a frontal perspective perspective view of the sensor of a COD water quality quantitative sampling device.

[0020] Legend: 1. First fixed plate; 2. Scale groove; 3. Slide plate; 4. Sensor; 5. Moving component; 501. Motor; 502. Output shaft; 503. Lead screw; 504. Connecting rod; 505. Limiting shaft; 6. Placement plate; 7. Fixed rod; 8. Sampling tube; 9. Piston; 10. Moving shaft. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1: As Figures 1-5 As shown, this utility model provides a quantitative sampling device for COD water quality detection, including a first fixed plate 1, a moving component 5 inside the first fixed plate 1, the moving component 5 including a motor 501, an output shaft 502 fixedly connected to the output end of the motor 501, a lead screw 503 fixedly connected to one end of the output shaft 502, a connecting rod 504 threadedly connected to the outer surface of the lead screw 503, a scale groove 2 opened on the outer surface of the first fixed plate 1, a sliding plate 3 slidingly connected to the inner wall of the scale groove 2, one end of the lead screw 503 movably embedded in the inner wall of the first fixed plate 1, a limiting shaft 505 fixedly embedded in the inner wall of the first fixed plate 1, the outer surface of the limiting shaft 505 slidingly against the inner wall of the connecting rod 504, a sensor 4 provided on the inner wall of the sliding plate 3, a placement plate 6 fixedly connected to one side of the inner wall of the first fixed plate 1, the motor 501 being disposed on the outer surface of the placement plate 6, and a fixing rod 7 fixedly connected to the other side of the inner wall of the first fixed plate 1.

[0024] The overall effect of Embodiment 1 is as follows: When using a COD water quality quantitative sampling device, the operator first needs to slide the slide plate 3 along the inner wall of the graduated groove 2 to the graduation mark indicating the required water volume. Simultaneously, the slide plate 3 will move the sensor 4 until the slide plate 3 is in the appropriate position within the graduated groove 2. Then, water is placed directly below the sampling tube 8. The operator then starts the motor 501, which drives the output shaft 502 to rotate. The output shaft 502 then drives the lead screw 503 to rotate. When the screw rotates, it will cause the connecting rod 504 to move along the outer surface of the lead screw 503. As the connecting rod 504 moves, it will also move along the outer surface of the limiting shaft 505. Simultaneously, the connecting rod 504 will drive the moving shaft 10 to move. The moving shaft 10 will then drive the piston 9 to move. As the piston 9 moves, its outer surface will move along the inner wall of the sampling tube 8. This movement of the piston 9 along the inner wall of the sampling tube 8 will cause a change in the internal space, creating a pressure difference that draws liquid into the sampling tube 8. When the liquid in the sampling tube 8... As the water volume gradually increases, the connecting rod 504 will slowly move closer to the horizontal direction of the slide plate 3 until it is at the horizontal direction of the slide plate 3. At this point, the sensor 4 will detect the movement of the connecting rod 504 and stop the motor 501. At this time, the water volume in the sampling tube 8 is exactly the volume required for sampling. This device, by setting the moving component 5, allows the operator to move the slide plate 3 and the sensor 4 to the appropriate position in the scale groove 2. Then, the operator starts the motor 501, which moves the connecting rod 504. As the connecting rod 504 moves, it moves the piston 9 in the sampling tube 8. When the water sample volume reaches the required scale, the connecting rod 504 is exactly at the same level as the slide plate 3. After the sensor 4 detects the connecting rod 504, it will stop the rotation of the motor 501, and the piston 9 will no longer move. At this time, the water volume in the sampling tube 8 is just right. This solves the problem that relying on individual operation of the operator to judge whether the liquid level has reached the scale line will result in a certain degree of human error, which will lead to inaccurate sampling volume and affect the accuracy of COD value.

[0025] Example 2: As Figures 1-5 As shown, a sampling tube 8 is fixedly connected to the outer surface of the fixed rod 7, a piston 9 is attached to the inner wall of the sampling tube 8, a moving shaft 10 is fixedly connected to the outer surface of the piston 9, and the outer surface of the moving shaft 10 is fixedly connected to the outer surface of the connecting rod 504.

[0026] The effect achieved by the entire embodiment 2 is that when a COD water quality quantitative sampling device is used, the piston 9 moves inside the sampling tube 8, thereby drawing water into the sampling tube 8. When the piston 9 draws water into the sampling tube 8, the water will enter the closed area between the piston 9 and the sampling tube 8, thereby reducing the contact between the water and external air impurities and reducing the pollution of the water by the external environment.

[0027] Working Principle: When using a COD water quality quantitative sampling device, the operator first needs to place the slide plate 3 in the appropriate position in the graduated slide groove 2, then start the motor 501. The motor 501 will drive the lead screw 503 to rotate, the lead screw 503 will drive the connecting rod 504 to move, the connecting rod 504 will drive the moving shaft 10 to move, and the moving shaft 10 will drive the piston 9 to move. The outer surface of the piston 9 moves along the inner wall of the sampling tube 8. When the piston 9 draws water into the sampling tube 8, the water will enter the closed area between the piston 9 and the sampling tube 8, thereby reducing the contact between the water and external air impurities. The connecting rod 504 will slowly move closer to the horizontal direction of the slide plate 3 until the connecting rod 504 is at the horizontal direction of the slide plate 3. At this time, sensor 4 will detect the movement of connecting rod 504, thereby stopping motor 501. At this time, the water volume in sampling tube 8 is exactly the volume that needs to be sampled. This device is equipped with moving component 5. After the operator moves the slide plate 3 to the appropriate position in the scale groove 2, the motor 501 is started, which will drive the connecting rod 504 to move. When the connecting rod 504 moves, it will drive the piston 9 to move in the sampling tube 8. When the water sample volume reaches the required scale, the connecting rod 504 is exactly at the same level as the slide plate 3. After the sensor 4 detects the connecting rod 504, it will stop the rotation of motor 501, thereby avoiding human error, ensuring the accuracy of sampling volume, and thus ensuring the accuracy of COD value.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A quantitative sampling device for COD water quality detection, comprising a first fixed plate (1), characterized in that: The first fixed plate (1) is provided with a moving component (5), which includes a motor (501). The output end of the motor (501) is fixedly connected to an output shaft (502). One end of the output shaft (502) is fixedly connected to a lead screw (503). The outer surface of the lead screw (503) is threaded with a connecting rod (504). The outer surface of the first fixed plate (1) is provided with a scale groove (2).

2. The COD water quality quantitative sampling device according to claim 1, characterized in that: The inner wall of the scale groove (2) is slidably fitted with a slide plate (3), and one end of the lead screw (503) is movably embedded in the inner wall of the first fixed plate (1).

3. The COD water quality quantitative sampling device according to claim 1, characterized in that: The inner wall of the first fixing plate (1) is fixedly embedded with a limiting shaft (505), and the outer surface of the limiting shaft (505) slides against the inner wall of the connecting rod (504).

4. The COD water quality quantitative sampling device according to claim 2, characterized in that: The inner wall of the skateboard (3) is provided with a sensor (4), and a shelf (6) is fixedly connected to one side of the inner wall of the first fixed plate (1).

5. The COD water quality quantitative sampling device according to claim 1, characterized in that: The motor (501) is mounted on the outer surface of the shelf (6), and a fixing rod (7) is fixedly connected to the inner wall of the other side of the first fixing plate (1).

6. The COD water quality quantitative sampling device according to claim 5, characterized in that: A sampling tube (8) is fixedly connected to the outer surface of the fixed rod (7), and a piston (9) is attached to the inner wall of the sampling tube (8).

7. The COD water quality quantitative sampling device according to claim 6, characterized in that: The outer surface of the piston (9) is fixedly connected to a movable shaft (10), and the outer surface of the movable shaft (10) is fixedly connected to the outer surface of the connecting rod (504).

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