COD (Chemical Oxygen Demand) multi-station digestion device
The COD multi-position dissolution apparatus addresses rapid evaporation and temperature fluctuations in COD measurement devices by using a spring-loaded rotating lid and S-shaped heating element, ensuring consistent sample conditions for accurate COD detection.
Patent Information
- Application Number
- CN202422260215.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-14
AI Technical Summary
When used, the water in the digester evaporates too fast and the temperature fluctuates greatly, resulting in poor sample digestion effect and affecting the accuracy of COD detection.
A COD multi-station digestion device is designed, adopting a rotary cover assembly and support structure. The rotary cover covers the placement holes when the sample cup is not placed through a torsion spring to reduce water vapor evaporation; the heating components adopt an S-shaped layout to heat evenly, and a temperature and liquid level sensor is set to control the temperature and water level.
It effectively reduces water vapor evaporation, maintains the temperature in the digestion tank to stabilize, improves the uniformity and accuracy of sample digestion, and ensures the reliability of COD detection.
Smart Images
Figure CN223107798U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of experimental instruments, in particular to a COD multi-station digestion device. Background Art
[0002] In the field of environmental protection, chemical oxygen demand (abbreviated as COD) is one of the main control indicators of surface water and wastewater, and is an important comprehensive indicator of organic pollution of water. Special digestion instruments are required to measure COD. When the existing digesters are in use, the places where sample cups are placed in the digestion pool are all open structures. Such a structure may cause the water in the digestion pool to evaporate too fast, and water needs to be replenished into the digestion pool at any time. At the same time, the internal temperature also fluctuates to a certain extent due to the evaporation of water vapor, resulting in poor digestion effect of samples, causing changes in the measured values of COD and unable to truly reflect the water quality. Summary of the Utility Model
[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a COD multi-station digestion device.
[0004] The purpose of the utility model is realized by the following technical solutions: A COD multi-station digestion device includes:
[0005] A digestion pool, in which a heating component is arranged.
[0006] A digestion pool cover, which is arranged on the top of the digestion pool. A plurality of placement holes for placing sample cups are arranged on the digestion pool cover. A rotary cover assembly is arranged on one side of each placement hole at the bottom of the digestion pool cover.
[0007] The rotary cover assembly includes a rotary cover and a torsion spring. One end of the rotary cover is rotatably connected to one side of the placement hole on the digestion pool cover through a rotating shaft, and the torsion spring is sleeved on the rotating shaft.
[0008] One end of the torsion spring abuts against the bottom surface of the digestion pool cover, and the other end abuts against the bottom surface of the rotary cover. The torsion spring is used to abut against the rotary cover to cover the placement hole when no sample cup is placed in the placement hole.
[0009] By setting the rotary cover assembly, when no sample cup is placed in the placement hole, the elastic force of the torsion spring makes the rotary cover fit with the digestion pool cover and cover the placement hole, effectively reducing water vapor evaporation and at the same time reducing the temperature fluctuation inside the digestion pool caused by water vapor evaporation.
[0010] In some embodiments, several of the placement holes are arrayed on the digestion cell cover, and a rotating shaft is provided on one side of each column of the placement holes on the digestion cell cover. A plurality of the rotating covers corresponding to the placement holes in the same column are rotatably connected to the same rotating shaft. Using the same rotating shaft for the rotating covers corresponding to the placement holes in the same column simplifies the structure.
[0011] In some embodiments, a support structure is provided at the bottom of the digestion cell cover. The support structure includes several support columns and a support platform for supporting the sample cup. The top end of the support column is connected to the bottom of the digestion cell cover, and the bottom end of the support column is connected to the support platform. By providing the support structure, the sample cup is supported.
[0012] In some embodiments, the support platform includes a partition plate and a backing plate. The partition plate is located on top of the backing plate and is fixedly connected to the backing plate. The support column is fixedly connected to the partition plate. A plurality of positioning holes corresponding to the several placement holes on the digestion cell cover are provided on the partition plate, and the positioning holes are used to position the bottom of the sample cup. The backing plate supports the sample cup, and the partition plate limits the sample cup to separate the bottoms of multiple sample cups.
[0013] In some embodiments, the distance between the digestion cell cover and the backing plate is less than the height of the sample cup. When the sample cup is placed into the placement hole, the top of the sample cup protrudes from the digestion cell cover, facilitating the taking of the sample cup.
[0014] In some embodiments, the heating component includes a heating tube, and the heating tube is provided at the bottom of the digestion cell. The heating tube is in an S shape. The S-shaped heating tube enables the heating tube to be in full contact with the water in the digestion cell, making the water evenly heated.
[0015] In some embodiments, a temperature sensor is further provided at the inner bottom of the digestion cell. The temperature sensor is used to detect the water temperature in the digestion cell.
[0016] In some embodiments, a liquid level sensor is provided in the digestion cell. The liquid level sensor is used to detect the water level height in the digestion cell for timely water addition.
[0017] In some embodiments, a liquid addition port and a liquid discharge port are further provided on the side wall of the digestion cell. By providing the liquid addition port and the liquid discharge port, it is convenient to add water into the digestion cell or discharge the water in the digestion cell.
[0018] In some embodiments, an overflow port is further provided on the side wall of the digestion cell. Through the overflow port, when the sample cup is placed into the placement hole, the water level in the digestion cell will rise. By providing the overflow port, the water level is prevented from rising too high.
[0019] The present utility model has the following advantages:
[0020] The utility model reduces the evaporation of water vapor and avoids the rapid consumption of water in the digestion cell and the temperature fluctuation in the digestion cell caused by the evaporation of water vapor by setting a rotating cover assembly. When placing a sample cup, the rotating cover can be pushed open by the gravity of the sample cup itself or by pressing the sample cup, so that the sample cup can be placed into the placement hole. When the sample cup is not placed in the placement hole, the rotating cover fits with the digestion cell cover and covers the placement hole under the elastic force of the torsion spring. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 is a schematic internal structure diagram of the COD multi-station digestion device of the utility model;
[0022] Figure 2 is a schematic bottom structure diagram of the digestion cell cover of the utility model;
[0023] Figure 3 is a schematic overall structure diagram of the COD multi-station digestion device of the utility model;
[0024] Figure 4 is a schematic structure diagram of the digestion cell of the utility model;
[0025] In the figure: 1, digestion cell; 2, heating component; 3, digestion cell cover; 31, placement hole; 32, connecting plate; 41, rotating cover; 42, torsion spring; 43, rotating shaft; 5, sample cup; 6, support column; 71, backing plate; 72, partition plate; 721, positioning hole; 81, temperature sensor; 82, liquid level sensor; 83, liquid adding port; 84, liquid discharging port; 85, overflow port. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] In order to make the purpose, technical solutions and advantages of the utility model clearer, the following further describes the utility model in detail with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Usually, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0027] The following further describes the utility model with reference to the drawings, but the protection scope of the utility model is not limited to the following.
[0028] As Figures 1-4 shown, a COD multi-station digestion device includes:
[0029] a digestion cell 1, in which a heating component 2 is arranged;
[0030] A digestion tank cover 3, wherein the digestion tank cover 3 is arranged on the top of the digestion tank 1, and a plurality of placement holes 31 for placing the sample cups 5 are arranged on the digestion tank cover 3, and a rotating cover assembly is arranged on one side of each placement hole 31 at the bottom of the digestion tank cover 3;
[0031] The rotating cover assembly includes a rotating cover 41 and a torsion spring 42. One end of the rotating cover 41 is rotatably connected to one side of the placement hole 31 on the digestion tank cover 3 through a rotating shaft 43. The torsion spring 42 is sleeved on the rotating shaft 43.
[0032] One end of the torsion spring 42 abuts against the bottom surface of the digestion tank cover 3 , and the other end abuts against the bottom surface of the rotating cover 41 . The torsion spring 42 is used to abut against the rotating cover 41 when no sample cup 5 is placed in the placement hole 31 so that the rotating cover 41 covers the placement hole 31 .
[0033] Specifically, in this embodiment, the digestion tank cover 3 is arranged on the top of the digestion tank 1 and connected to the digestion tank 1 by bolts. In the process of using this device, when it is necessary to digest the sample, align the sample cup 5 with the placement hole 31 and put it down. Since the rotating cover assembly is arranged at the bottom of the digestion tank cover 3, the bottom of the sample cup 5 can be pushed open by the gravity of the sample cup 5 or by pressing the sample cup 5 to push the rotating cover 41 into the placement hole 31; when there is no sample cup 5 in the placement hole 31, since the rotating cover 41 is rotatably connected with the rotating shaft 43, the rotating shaft 43 is sleeved with a torsion spring 42, and the elastic force of the torsion spring 42 makes the rotating cover 41 fit with the digestion tank cover 3, and the rotating cover 41 covers the placement hole 31, which effectively reduces the evaporation of water vapor, avoids the excessive consumption of water in the digestion tank 1, and avoids the large fluctuation of temperature in the digestion tank 1 caused by the evaporation of water vapor, so that the water in the digestion tank 1 is kept in a slightly boiling state, providing a good environment for the digestion of the sample.
[0034] Preferably, the plurality of placement holes 31 are distributed in an array on the digestion tank cover 3 , and a rotating shaft 43 is provided on one side of each column of the placement holes 31 on the digestion tank cover 3 , and the plurality of rotating covers 41 corresponding to the placement holes 31 in the same column are rotatably connected to the same rotating shaft 43 .
[0035] Specifically, in this embodiment, a plurality of placement holes 31 are arranged in an array on the digestion tank cover 3, and two long strip-shaped connecting plates 32 are respectively arranged on both sides of each row of placement holes 31 at the bottom of the digestion tank cover 3;
[0036] A rotating shaft 43 is disposed on one side of each column of placement holes 31, and the rotating shaft 43 passes through the connecting plates 32 on both sides of the multiple rows of placement holes 31 and is fixedly connected to the connecting plates 32;
[0037] The rotating cover 41 is rotatably connected to the rotating shaft 43, and the rotating covers 41 corresponding to each row of placement holes 31 are rotatably connected to the same rotating shaft 43;
[0038] On one side of the rotary cover 41, there are two hinge ears. The rotary cover 41 is rotatably connected to the rotating shaft 43 through the two hinge ears. The two hinge ears on one side of the rotary cover 41 are located between two connecting plates 32 on both sides of the corresponding placement hole 31. The connecting plates 32 limit the rotary cover 41 in the length direction of the rotating shaft 43 while fixing the rotating shaft 43.
[0039] A torsion spring 42 is sleeved on the rotating shaft 43. One end of the torsion spring 42 abuts against the bottom of the digestion cell cover 3, and the other end abuts against the bottom of the rotary cover 41. Due to the elastic force of the torsion spring 42, the rotary cover 41 fits against the bottom of the digestion cell cover 3 to cover the placement hole 31. When the sample cup 5 is placed into the placement hole 31, the sample cup 5 pushes the rotary cover 41 downward. Since the rotary cover assembly is arranged at the bottom of the digestion cell cover 3, the sample cup 5 can push the rotary cover 41 open. When the sample cup 5 is taken out, due to the elastic force of the torsion spring 42, the rotary cover 41 is automatically closed again.
[0040] Preferably, a support structure is arranged at the bottom of the digestion cell cover 3. The support structure includes a plurality of support columns 6 and a support table for supporting the sample cup 5. The top ends of the support columns 6 are connected to the bottom of the digestion cell cover 3, and the bottom ends of the support columns 6 are connected to the support table. In this embodiment, the digestion cell cover 3 is rectangular, and support columns 6 are arranged at the four corners of the digestion cell cover 3. Correspondingly, the support table is also rectangular, and the four support columns 6 are respectively connected to the four corners of the support table. The support structure provides support for the sample cup 5.
[0041] Preferably, the support table includes a partition plate 72 and a cushion plate 71. The partition plate 72 is located on the top of the cushion plate 71 and is fixedly connected to the cushion plate 71. The support column 6 is fixedly connected to the partition plate 72. A plurality of positioning holes 721 corresponding to the plurality of placement holes 31 on the digestion cell cover 3 are arranged on the partition plate 72. The positioning holes 721 are used to position the bottom of the sample cup 5.
[0042] Specifically, in this embodiment, side plates are arranged at the edges of the cushion plate 71, and the tops of the side plates are connected to the edges of the partition plate 72. The cushion plate 71 and the partition plate 72 are fixedly connected through the side plates, so that there is a certain gap between the partition plate 72 and the cushion plate 71. A plurality of positioning holes 721 are arranged in an array on the partition plate 72, and the positioning holes 721 are vertically aligned with the placement holes 31. The positioning holes 721 are used to limit the position of the bottom of the sample cup 5. Since the side part of the sample cup 5 continuously receives the elastic force of the torsion spring 42 transmitted by the rotary cover 41 after the sample cup 5 is placed into the placement hole 31, by placing the bottom of the sample cup 5 into the positioning holes 721, the sample cup 5 is prevented from tilting. At the same time, the sample cup 5 is supported by the cushion plate 71 and the sample cup 5 is isolated from the heating component 2.
[0043] Preferably, the distance between the digestion cell cover 3 and the backing plate 71 is less than the height of the sample cup 5. The height of the sample cup 5 is higher than the distance between the backing plate 71 and the digestion cell cover 3, preventing the sample cup 5 from completely entering the interior of the digestion cell 1 and making the top of the sample cup 5 protrude from the digestion cell cover 3, facilitating the staff to pick up the sample cup 5.
[0044] Preferably, the heating component 2 includes a heating tube, which is arranged at the bottom of the digestion cell 1 and is in an S shape. The water in the digestion cell 1 is heated by the heating tube. By setting the heating tube in an S shape, the water in the digestion cell 1 is heated evenly, avoiding uneven water temperature in different regions of the digestion cell 1.
[0045] Preferably, a temperature sensor 81 is further arranged at the inner bottom of the digestion cell 1. The temperature sensor 81 is used to monitor the temperature of the water in the digestion cell 1 so as to adjust the water temperature in a timely manner.
[0046] Preferably, a liquid level sensor 82 is arranged inside the digestion cell 1. The liquid level sensor 82 is used to detect the liquid level height inside the digestion cell 1 so as to add water into the digestion cell 1 when the liquid level is too low.
[0047] Preferably, a liquid adding port 83 and a liquid discharging port 84 are further arranged on the side wall of the digestion cell 1. Through the liquid adding port 83 and the liquid discharging port 84 on the side wall of the digestion cell 1, it is convenient to add water into the digestion cell 1 or discharge the water in the digestion cell 1.
[0048] Preferably, an overflow port 85 is further arranged on the side wall of the digestion cell 1. When the water level in the digestion cell 1 is too high, for example, too much water is added through the liquid adding port 83, or the liquid level in the digestion cell 1 rises when the sample cup 5 is placed into the placing hole 31, the excess water is discharged through the overflow port 85, preventing the water from overflowing through the placing hole 31.
[0049] The above are only the preferred embodiments of the present utility model and do not impose any formal limitations on the present utility model. Any person skilled in the art can, without departing from the scope of the technical solution of the present utility model, make many possible changes and modifications to the technical solution of the present utility model by using the above-mentioned technical content, or modify it into an equivalent embodiment with equivalent changes. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments based on the technical solution of the present utility model without departing from the content of the technical solution of the present utility model all fall within the protection scope of this technical solution.
Claims
1. A COD multi-station digestion device, characterized in that, Comprising: A digestion tank (1) with a heating component (2) arranged therein; A digestion tank cover (3) provided on the top of the digestion tank (1). The digestion tank cover (3) is provided with a plurality of placement holes (31) for placing sample cups (5). One side of each placement hole (31) at the bottom of the digestion tank cover (3) is provided with a rotary cover assembly; The rotary cover assembly includes a rotary cover (41) and a torsion spring (42). One end of the rotary cover (41) is rotatably connected to one side of the placement hole (31) on the digestion tank cover (3) through a rotating shaft (43), and the torsion spring (42) is sleeved on the rotating shaft (43); One end of the torsion spring (42) abuts against the bottom surface of the digestion tank cover (3), and the other end abuts against the bottom surface of the rotary cover (41). The torsion spring (42) is used to abut against the rotary cover (41) when the sample cup (5) is not placed in the placement hole (31) so that the rotary cover (41) covers the placement hole (31).
2. The COD multi-station digestion device according to claim 1, wherein, The plurality of placement holes (31) are arranged in an array on the digestion tank cover (3). One rotating shaft (43) is provided on one side of each column of the placement holes (31) on the digestion tank cover (3). The plurality of rotary covers (41) corresponding to the placement holes (31) in the same column are rotatably connected to the same rotating shaft (43).
3. A COD multi-station digestion device according to claim 1, characterized in that, A support structure is provided at the bottom of the digestion tank cover (3). The support structure includes a plurality of support columns (6) and a support platform for supporting the sample cup (5). The top end of the support column (6) is connected to the bottom of the digestion tank cover (3), and the bottom end of the support column (6) is connected to the support platform.
4. The COD multi-station digestion device according to claim 3, characterized in that, The support platform includes a partition plate (72) and a backing plate (71). The partition plate (72) is located on the top of the backing plate (71) and is fixedly connected to the backing plate (71). The support column (6) is fixedly connected to the partition plate (72). A plurality of positioning holes (721) corresponding to the plurality of placement holes (31) on the digestion tank cover (3) are provided on the partition plate (72) for positioning the bottom of the sample cup (5).
5. The COD multi-station digestion device according to claim 4, wherein, The distance between the digestion tank cover (3) and the backing plate (71) is less than the height of the sample cup (5).
6. The COD multi-station digestion device according to claim 1, wherein, The heating component (2) includes a heating pipe provided at the bottom of the digestion tank (1), and the heating pipe is in an S shape.
7. A COD multi-station digestion device according to claim 1, characterized in that, A temperature sensor (81) is further provided at the inner bottom of the digestion tank (1).
8. The COD multi-station digestion device according to claim 1, wherein, A liquid level sensor (82) is provided inside the digestion tank (1).
9. A COD multi-station digestion device according to claim 1, characterized in that, A liquid adding port (83) and a liquid discharging port (84) are further provided on the side wall of the digestion tank (1).
10. A COD multi-station digestion device according to claim 1, characterized in that, An overflow port (85) is further provided on the side wall of the digestion tank (1).