Oxygen consumption testing screen capable of being provided with scales

Abstract

The utility model discloses an oxygen consumption test screen mesh with scales, which comprises a screen mesh main body, the screen mesh main body is positioned in a screening funnel, a fixed ring wall is fixedly arranged on the inner side wall of the screening funnel, the bottom of the fixed ring wall extends inwards to be provided with a limiting ring, the bottom surface of the screen mesh main body is fixedly connected with an extension ring wall, and the extension ring wall is fixedly connected with the screen mesh main body. A limiting structure is arranged on the extension ring wall in the circumferential direction, and the extension ring wall is located on the limiting ring. According to the oxygen consumption testing screen capable of being provided with the scales, the screen is transformed into a funnel shape, the screen is located at the middle-upper position, the bottom of the funnel is provided with the flow rate adjusting valve, and the lower side of the funnel of the screen is provided with the replaceable measuring cylinder with the scales of 100 mL, so that liquid collection and liquid measurement are achieved in one step, an experiment table top can be dried, experiment steps are reduced, and the experiment efficiency is improved. And meanwhile, the screen is conveniently fixed and replaced through a limiting structure.

Description

Technical Field

[0001] This utility model relates to the field of laboratory testing equipment technology, specifically to a graduated oxygen consumption test sieve. Background Technology

[0002] Chemical oxygen demand (COD) is a chemical method used to measure the amount of reducing substances in a water sample that need to be oxidized. Under certain conditions, the amount of oxidant consumed to oxidize the reducing substances in 1 liter of water sample is used as an indicator, and it is converted into the number of milligrams of oxygen required per liter of water sample to be completely oxidized, expressed in mg / L. It reflects the degree of pollution by reducing substances in the water. Currently, both standard and commercially available basic sieves only have a filtration function. Therefore, in the COD filtration process, on the one hand, an additional receiving device is needed to collect the filtrate; on the other hand, during liquid transfer, liquid continues to drip from the sieve, causing the experimental table to be covered with droplets. Furthermore, a graduated cylinder must be used to measure 100 ml of liquid, making the process numerous and time-consuming.

[0003] This case arose in order to resolve the aforementioned issues. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a graduated oxygen consumption test sieve, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a graduated oxygen consumption test sieve, comprising a sieve body, the sieve body being located inside a sieve funnel, a fixed ring wall being fixedly provided on the inner side wall of the sieve funnel, a limiting ring extending inward from the bottom of the fixed ring wall, an extension ring wall being fixedly connected to the bottom surface of the sieve body, the extension ring wall being provided with a limiting structure circumferentially, and the extension ring wall being located on the limiting ring.

[0008] Preferably, the limiting structure includes a fixed column, a vertical column, and a limiting groove, wherein the limiting groove is circumferentially formed on the extended ring wall, and the end of the fixed column is fixedly connected to the movable block.

[0009] Preferably, the movable block is located on the outer side of the outer wall of the sieve funnel, the fixed column passes through the side wall of the sieve funnel and is slidably connected to the side wall of the sieve funnel, and the other end of the fixed column is fixedly connected to the vertical column.

[0010] Preferably, the vertical column is the same size as the limiting groove and their positions correspond, and the width of the extending ring wall is the same as the width of the limiting ring.

[0011] Preferably, the bottom of the sieving funnel is fixedly connected to the bottom of the funnel.

[0012] (III) Beneficial Effects

[0013] After adopting the above technical solution, this utility model has the following advantages compared with the prior art: This utility model provides a graduated oxygen consumption test sieve, which transforms the sieve into a funnel shape. The sieve is located in the upper middle position, and the bottom of the funnel is equipped with a flow rate regulating valve. A replaceable 100mL graduated measuring cylinder is provided on the lower side of the sieve funnel, so as to collect and measure liquid in one step, keep the experimental table surface dry, reduce experimental steps, and at the same time, the limiting structure enables convenient fixing and replacement of the sieve. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the main body of the screen of this utility model;

[0016] Figure 3 This is a bottom view of the main body of the screen of this utility model;

[0017] Figure 4 This is a side view of the main body of the screen of this utility model.

[0018] In the diagram: 1. Screening funnel; 2. Screen body; 3. Fixed ring wall; 4. Moving block; 5. Fixed column; 6. Vertical column; 7. Limiting groove; 8. Lower bottom of the funnel; 9. Extending ring wall. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1-4 As shown: A graduated oxygen consumption test sieve includes a sieve body 2, which is located inside a sieve funnel 1. A fixed ring wall 3 is fixedly provided on the inner side wall of the sieve funnel 1. A limiting ring extends inward from the bottom of the fixed ring wall 3. An extension ring wall 9 is fixedly connected to the bottom surface of the sieve body 2. The extension ring wall 9 has a limiting structure in the circumferential direction and is located on the limiting ring. First, the moving block 4 is moved inward so that the moving block 4 is attached to the side wall of the sieve funnel 1. At this time, the fixed column 5 moves inward to the extreme point. Then, the sieve body 2 is placed on the limiting ring inside the sieve funnel 1. At this time, the moving block 4 is pulled outward so that the vertical column 6 is inserted into the limiting groove 7, thereby fixing and limiting the extension ring wall 9 and the sieve body 2.

[0021] The limiting structure includes a fixed column 5, a vertical column 6, and a limiting groove 7. The limiting groove 7 is circumferentially opened on the extension ring wall 9. The limiting ring is also provided with a groove at the position corresponding to the limiting groove 7 on the extension ring wall 9, so that the vertical column 6 can be locked in it to achieve fixed limiting. The end of the fixed column 5 is fixedly connected to the moving block 4.

[0022] The movable block 4 is located on the outer side of the outer wall of the sieve funnel 1. The fixed column 5 passes through the side wall of the sieve funnel 1 and is slidably connected to the side wall of the sieve funnel 1. By pulling the movable block 4 back and forth, the fixed column 5 is moved, thereby realizing the locking of the vertical column 6 with the limiting groove 7. The other end of the fixed column 5 is fixedly connected to the vertical column 6.

[0023] The vertical column 6 is the same size as the limiting groove 7 and is positioned accordingly. The width of the extension ring wall 9 is the same as the width of the limiting ring. When the extension ring wall 9 falls on the limiting ring, it can be supported and fixed.

[0024] The bottom of the sieving funnel 1 is fixedly connected to the funnel bottom 8, which is equipped with a flow rate regulating valve. A replaceable 100mL graduated cylinder is attached to the lower side of the funnel bottom 8, which can collect and measure liquid in one step and keep the experimental table surface dry.

[0025] The above-described embodiments are provided for illustrative purposes. Based on the above description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this utility model is not limited to the contents of the specification; its protection scope must be determined according to the claims.

Claims

1. A graduated oxygen consumption test sieve, comprising a sieve body (2), characterized in that: The screen body (2) is located inside the sieve funnel (1). A fixed ring wall (3) is fixedly provided on the inner side wall of the sieve funnel (1). A limiting ring is provided extending inward from the bottom of the fixed ring wall (3). An extension ring wall (9) is fixedly connected to the bottom surface of the screen body (2). A limiting structure is provided circumferentially on the extension ring wall (9). The extension ring wall (9) is located on the limiting ring.

2. The graduated oxygen consumption test sieve according to claim 1, characterized in that: The limiting structure includes a fixed column (5), a vertical column (6), and a limiting groove (7). The limiting groove (7) is circumferentially opened on the extended ring wall (9). The end of the fixed column (5) is fixedly connected to the moving block (4).

3. The graduated oxygen consumption test sieve according to claim 2, characterized in that: The movable block (4) is located on the outer side of the outer wall of the sieve funnel (1), the fixed column (5) passes through the side wall of the sieve funnel (1) and is slidably connected to the side wall of the sieve funnel (1), and the other end of the fixed column (5) is fixedly connected to the vertical column (6).

4. The graduated oxygen consumption test sieve according to claim 3, characterized in that: The vertical column (6) is the same size as the limiting groove (7) and is in the same position. The width of the extended ring wall (9) is the same as the width of the limiting ring.

5. The graduated oxygen consumption test sieve according to claim 1, characterized in that: The bottom of the sieving funnel (1) is fixedly connected to the bottom of the funnel bottom (8).

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