Sample pretreatment device for water environment monitoring

Abstract

The utility model relates to water sample processing technical field, concretely is a kind of sample pretreatment device for water environment monitoring, it includes: inner tube, its bottom surface is connected with water suction pipe, the top surface of the inner tube is equipped with round slot, valve is fixedly installed on the water suction pipe;Outer tube, sliding sleeve is connected in the outer wall of inner tube, the top surface of the outer tube is provided with drain and titration mouth, the inner top surface of the outer tube is provided with stirring mechanism, the conveying shaft transmission of the motor is connected with rotating shaft.The utility model in, by the inner tube, outer tube and tubular filter screen are set to similar needle cylinder structure, utilize the rapid extraction and filtration of sample of negative pressure principle, improve the convenience and efficiency of operation, the sliding connection of tubular filter screen and inner tube, the rapid separation of sample and impurity is realized, and this design scheme sets sampling, filtration, stirring, pH determination in one, simplifies sample pretreatment process, improves monitoring efficiency.

Description

Technical Field

[0001] This utility model relates to the field of water sample processing technology, specifically a sample pretreatment device for water environment monitoring. Background Technology

[0002] Water environment monitoring is a comprehensive analysis of pollutants and their components in a water environment using physical, chemical, and biological techniques. It aims to explore and study the changing patterns of water quality. The specific content monitored by water environment monitoring is extensive, covering a variety of water quality indicators. Among them, volatile phenols, total bacterial count, total coliforms, and fecal coliforms are common monitoring items. These indicators are of great significance for assessing the degree of pollution, sanitary conditions, and potential health risks of water bodies.

[0003] pH measurement is an indispensable part of sample pretreatment and subsequent analysis. However, traditional methods may require using pipettes, tubes, or pouring to transfer the water sample from the sampling point to a laboratory container, then filtering the sample with filtration equipment before pH measurement can be performed. This process involves multiple steps and equipment, increasing the complexity of the operation and resulting in low efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a sample pretreatment device for water environment monitoring to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A sample pretreatment device for water environment monitoring, comprising:

[0007] The inner cylinder has a water pumping pipe connected to its bottom surface, and a circular groove is opened on the top surface of the inner cylinder. A valve is installed and fixed on the water pumping pipe.

[0008] An outer cylinder is slidably fitted onto the outer wall of an inner cylinder. The top surface of the outer cylinder is provided with a drain outlet and a titration outlet. The inner top surface of the outer cylinder is provided with a stirring mechanism, which includes a motor. The motor's conveying shaft is drivenly connected to a rotating shaft. The bottom end of the rotating shaft is fixedly connected to a connecting frame. Several stirring rods are fixedly connected to the bottom surface of the connecting frame. A connecting rod is fixedly connected to the bottom surface of the connecting frame. A pH probe is installed on the inner wall of the outer cylinder.

[0009] A cylindrical filter screen is slidably connected to the inside of an inner cylinder. A top plate is fixedly connected to the top surface of the cylindrical filter screen, and the top surface of the top plate is rotatably connected to a connecting rod. A bottom ring is sleeved and fixed to the outer wall of the cylindrical filter screen near the bottom.

[0010] Furthermore, a limiting groove is formed on the outer wall of the inner cylinder, and the bottom of the outer cylinder contacts it.

[0011] Furthermore, the inner wall of the inner cylinder is fixedly connected with several limiting protrusions at equal angles.

[0012] Furthermore, the outer wall of the bottom ring is provided with several mating grooves at equal angles, and the mating grooves are mated with the limiting protrusions.

[0013] Furthermore, a rubber stopper is provided on the outer wall of the bottom ring.

[0014] Furthermore, the bottom surface of the inner cylinder has two pull rings that are symmetrically and fixedly connected to each other.

[0015] Furthermore, the outer wall of the outer cylinder is provided with an anti-slip sleeve.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] By setting the inner cylinder, outer cylinder, and cylindrical filter screen to a structure similar to a syringe, the negative pressure principle is used to achieve rapid sample extraction and filtration, improving the convenience and efficiency of operation. The sliding connection between the cylindrical filter screen and the inner cylinder enables rapid separation of samples and impurities. Furthermore, this design integrates sampling, filtration, stirring, and pH measurement, simplifying the sample pretreatment process and improving monitoring efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a sample pretreatment device for water environment monitoring according to this utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of a sample pretreatment device for water environment monitoring according to this utility model;

[0020] Figure 3 This is a schematic diagram of the inner cylinder structure in this utility model;

[0021] Figure 4 This is a schematic diagram of the cylindrical filter structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the internal structure of a sample pretreatment device for water environment monitoring according to this utility model.

[0023] In the diagram: 100, inner cylinder; 110, water pipe; 120, limiting protrusion; 130, limiting groove; 140, valve; 150, pull ring; 200, outer cylinder; 210, drain outlet; 220, titration port; 230, stirring mechanism; 231, rotating shaft; 232, connecting frame; 233, stirring rod; 234, motor; 235, connecting rod; 240, pH probe; 250, anti-slip sleeve; 300, cylindrical filter screen; 310, top plate; 320, bottom ring; 321, fitting groove. Detailed Implementation

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

[0025] Please see Figure 1-5 In this embodiment of the present invention, a sample pretreatment device for water environment monitoring includes an inner cylinder 100, an outer cylinder 200, and a cylindrical filter screen 300. Both the inner cylinder 100 and the outer cylinder 200 are made of transparent material for easy observation. A water suction pipe 110 is connected to the bottom surface of the inner cylinder 100 for drawing water samples. A circular groove is formed on the top surface of the inner cylinder 100, and a valve 140 is fixedly installed on the water suction pipe 110. A circular groove is formed on the bottom surface of the outer cylinder 200, and the position of the circular groove on the outer cylinder 200 is slidably sleeved with the outer wall of the inner cylinder 100. A drain outlet 210 and a titration port 220 are provided on the top surface of the outer cylinder 200, and both the drain outlet 210 and the titration port 220 are provided with removable caps. A stirring mechanism 230 is provided on the inner top surface of the outer cylinder 200, and the stirring mechanism 230 includes a motor 234, which is fixedly connected to the outer cylinder 200. On the top surface of the outer cylinder 200, the conveying shaft of the motor 234 is connected to a rotating shaft 231. The rotating shaft 231 is located inside the outer cylinder 200. A connecting frame 232 is fixedly connected to the bottom end of the rotating shaft 231. Several stirring rods 233 are fixedly connected at equal angles to the bottom surface of the connecting frame 232. A connecting rod 235 is fixedly connected to the bottom surface of the connecting frame 232. A pH probe 240 is installed on the inner wall of the outer cylinder 200. The cylindrical filter screen 300 is slidably inserted into the inner cylinder 100 from top to bottom. A top plate 310 is fixedly connected to the top surface of the cylindrical filter screen 300. A rubber strip is provided at the position where the bottom surface of the top plate 310 contacts the top surface of the inner cylinder 100. The top surface of the top plate 310 is rotatably connected to the connecting rod 235. A bottom ring 320 is sleeved and fixed to the outer wall of the cylindrical filter screen 300 near the bottom. The outer wall of the bottom ring 320 contacts the inner wall of the inner cylinder 100.

[0026] Specifically, in use, insert the bottom end of the suction pipe 110 into the water sample, keep the inner cylinder 100 stationary, and pull the outer cylinder 200 upward to create a negative pressure inside the inner cylinder 100, causing the water sample to enter the inner cylinder 100 through the suction pipe 110. Since the outer cylinder 200 is connected to the cylindrical filter screen 300 via the connecting rod 235, the cylindrical filter screen 300 will also move upward when the outer cylinder 200 moves upward. Then, close the valve 140 and reverse the device, allowing the water sample in the inner cylinder 100 to flow into the outer cylinder 200 after being filtered by the cylindrical filter screen 300. Then, open the valve 140 again to push the outer cylinder 200 back to its original position and close the valve 140 again to expel most of the air. The bottom surface of the top plate 310 will once again abut against the top surface of the inner cylinder 100, at which point impurities in the sample are effectively isolated. Inside the cylindrical filter 300, the filtered water sample remains inside the outer cylinder 200. The cap of the titration port 220 is opened, and an indicator is added to measure the pH. The motor 234 is started, causing the rotating shaft 231 to drive several stirring rods 233 to rotate, agitating the sample and ensuring thorough mixing of the indicator and sample. The pH value is then measured using the pH probe 240 located inside the outer cylinder 200. After the test, the cap of the drain port 210 is opened to drain the water sample. When cleaning the device is required, the outer cylinder 200 is stretched to move the cylindrical filter 300 upwards. The valve 140 is opened, and clean water is injected through the drain port 210 or the titration port 220 for rinsing. The clean water passes through the outside of the cylindrical filter 300 and enters its interior, cleaning the inner wall of any adhering substances before being discharged through the drain pipe 110.

[0027] like Figure 3-4 As shown, in this embodiment, the inner wall of the inner cylinder 100 is fixedly connected with several limiting protrusions 120 at equal angles, and the outer wall of the bottom ring 320 is provided with several mating grooves 321 at equal angles. The mating grooves 321 and the limiting protrusions 120 are mated, and the outer wall of the bottom ring 320 is provided with a rubber plug to enhance the sealing of the contact position between the two.

[0028] In this embodiment, since the top plate 310 and the connecting frame 232 are connected by the connecting rod 235, when the outer cylinder 200 moves upward, the cylindrical filter screen 300 will move upward accordingly. The bottom end of the connecting rod 235 is rotatably connected to the top surface of the top plate 310. In addition, the limiting formed by the fitting groove 321 and the limiting protrusion 120 allows the cylindrical filter screen 300 to move stably in the vertical direction and will not rotate when the stirring mechanism 230 rotates.

[0029] like Figure 2-3 As shown, in this embodiment, a limiting groove 130 is provided on the outer wall of the inner cylinder 100, and the inner wall of the bottom circular groove of the outer cylinder 200 is in contact with it. A leak-proof rubber plug is also provided at the bottom circular groove of the outer cylinder 200.

[0030] In practice, the outer wall of the inner cylinder 100 is provided with an inwardly recessed annular limiting groove 130, and the circular groove at the bottom of the outer cylinder 200 is slidably sleeved with the outer wall of the limiting groove 130 to restrict the movement of the outer cylinder 200.

[0031] like Figure 1 As shown, in this embodiment, two pull rings 150 are fixedly connected symmetrically to the bottom surface of the inner cylinder 100, and an anti-slip sleeve 250 is provided on the outer wall of the outer cylinder 200.

[0032] In practice, when drawing water samples, one hand can hold the bottom of the inner cylinder 100 firmly so that the pull ring 150 is against the finger, and the other hand can hold the anti-slip sleeve 250 on the outer wall of the outer cylinder 200. Then, pull the outer cylinder 200 upwards, which is more labor-saving.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sample pretreatment device for water environment monitoring, characterized by, The utility model relates to a pH value titration device, including: The bottom surface of inner tube (100) is connected with water pumping pipe (110), and the top surface of inner tube (100) is provided with circular slot, and valve (140) is fixedly installed on water pumping pipe (110); Outer tube (200) is sleeved on the outer wall of inner tube (100), and the top surface of outer tube (200) is provided with drain port (210) and titration port (220), and the inner top surface of outer tube (200) is provided with stirring mechanism (230), and stirring mechanism (230) includes motor (234), the transmission shaft of motor (234) is connected with rotating shaft (231), the bottom end of rotating shaft (231) is fixedly connected with connecting frame (232), the bottom surface of connecting frame (232) is fixedly connected with a plurality of stirring rods (233), the bottom surface of connecting frame (232) is fixedly connected with connecting rod (235), and the inner wall of outer tube (200) is provided with pH probe (240); Cylindrical filter screen (300) is connected with the inside of inner tube (100), and the top surface of cylindrical filter screen (300) is fixedly connected with top plate (310), and the top surface of top plate (310) is rotatably connected with connecting rod (235), and the outer wall of cylindrical filter screen (300) near the bottom is fixedly sleeved with bottom ring (320).

2. The sample pretreatment device for water environment monitoring according to claim 1, characterized by, The outer wall of inner tube (100) is provided with limiting groove (130), and the bottom of outer tube (200) is in contact with it.

3. The sample pretreatment device for water environment monitoring according to claim 1, characterized by, The inner wall of inner tube (100) is fixedly connected with a plurality of limiting convex strips (120) at equal angles.

4. The sample pretreatment device for water environment monitoring according to claim 1, characterized by, The outer wall of bottom ring (320) is provided with a plurality of fitting grooves (321) at equal angles, and the fitting grooves (321) are matched with limiting convex strips (120).

5. The sample pretreatment device for water environment monitoring according to claim 1 or 4, characterized by, The outer wall of bottom ring (320) is provided with rubber plug.

6. The sample pretreatment device for water environment monitoring according to claim 1, wherein The bottom surface of inner tube (100) is fixedly connected with two pull rings (150) symmetrically.

7. The sample pretreatment device for water environment monitoring according to claim 1, wherein The outer wall of outer tube (200) is provided with anti-skid sleeve (250).

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