Chemical oxygen demand digestion device

Abstract

The utility model discloses a digestion device for chemical oxygen demand, which relates to the technical field of water quality detection and analysis and comprises a bottom plate, a heat insulation plate and a support column are fixedly arranged at the upper end of the bottom plate, the support column is arranged on one side of the heat insulation plate, and a digestion box is fixedly arranged at the upper end of the heat insulation plate. The digestion box is internally provided with a plurality of mounting holes for placing digestion pipes, the digestion box is also internally provided with heating sheets, the heating sheets are arranged below the mounting holes, the device further comprises a heat dissipation mechanism and a quantitative injection mechanism, the heat dissipation mechanism is arranged on the outer side of the digestion box, and the quantitative injection mechanism is arranged above the digestion box. The quantitative injection mechanism is arranged, the liquid volume in the quantitative cylinder can be controlled, manual liquid adding and cleaning operation is not needed, repeated use is facilitated, and the labor degree and the safety risk probability of a user are greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of water quality testing and analysis technology, specifically a chemical oxygen demand (COD) digestion device. Background Technology

[0002] Chemical oxygen demand (COD) refers to the mass of oxygen consumed by the reducing agents in water when potassium dichromate is oxidized by the strong oxidant potassium dichromate under certain conditions, expressed in mg / L. There are many existing methods for measuring COD, but most employ rapid digestion spectrophotometry. For example, the automatic COD analysis device and method described in patent publication number CN114624200A use a rapid digestion spectrophotometric method. However, this method involves multiple aspiration and injection of chemical reagents via a solution quantitative transfer device. After each injection, the transfer device needs to be cleaned. Since many chemical reagents are toxic or harmful solutions, the cleaning process is cumbersome and unsafe. Furthermore, the device lacks a heat preservation or cooling structure for the digestion module, which hinders the reduction of digestion time.

[0003] Based on this, a chemical oxygen demand (COD) digestion device is now provided, which can eliminate the drawbacks of existing technical solutions. Utility Model Content

[0004] The purpose of this invention is to provide a chemical oxygen demand (COD) digestion device to solve the problems in the prior art where the transferor needs to be cleaned multiple times, leading to safety risks and the lack of insulation or cooling structures for the digestion module.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A chemical oxygen demand (COD) digestion device includes a base plate, an insulation plate and a support column fixedly disposed on the upper end of the base plate, the support column being disposed on one side of the insulation plate, a digestion box fixedly disposed on the upper end of the insulation plate, a plurality of mounting holes for placing digestion tubes being disposed inside the digestion box, and a heating element being disposed inside the digestion box, the heating element being disposed below the mounting holes.

[0007] It also includes a heat dissipation mechanism and a quantitative injection mechanism. The heat dissipation mechanism is located on the outside of the digestion chamber and is used to dissipate heat and insulate the digestion chamber. The quantitative injection mechanism is located above the digestion chamber and is connected to the support column through a moving component.

[0008] The movable component includes a groove formed on the surface of the support column, a screw is rotatably disposed inside the groove, and a sliding plate is threaded onto the screw, the sliding plate being slidably connected to the groove.

[0009] Preferably, the heat dissipation mechanism includes a plurality of sliding brackets, wherein heat dissipation fins and heat insulation fins are slidably disposed inside the sliding brackets, the heat insulation fins are disposed on the side of the heat dissipation fins close to the digestion chamber, and a plurality of heat dissipation fins are fixedly disposed on the side of the heat dissipation fins away from the digestion chamber.

[0010] Preferably, the quantitative injection mechanism includes a liquid storage tank fixedly connected to a slide plate. The liquid storage tank has a plurality of liquid storage holes evenly spaced inside. A plurality of metering cylinders are arranged below the liquid storage tank. The metering cylinders are connected to the liquid storage tank via a bracket. A push plate is slidably arranged inside the metering cylinder. An adjustment component for moving the push plate is arranged above the metering cylinder. An infusion tube is connected to the push plate. The other end of the infusion tube is connected to a liquid storage hole. A control valve is arranged on the infusion tube.

[0011] Preferably, the adjusting assembly includes several positioning blocks fixedly disposed on the lower surface of the liquid storage tank. Each positioning block has a gear rotatably disposed inside it. One end of the gear shaft extends to the outside of the positioning block and is connected to the output end of the rotary motor. A rack is meshed with one side of the gear. The lower end of the rack is fixedly connected to the upper surface of the push plate. A guide hole is opened on the positioning block, and the rack is slidably connected to the guide hole.

[0012] Preferably, a control panel is provided on one side of the base plate, and the control panel is electrically connected to the heating element and the rotary motor.

[0013] Preferably, the upper end of the digestion box is slidably provided with a cover plate for covering the digestion tube.

[0014] Preferably, the outer surface of the metering cylinder is provided with graduation lines.

[0015] Preferably, it also includes a placement groove on the upper surface of the digestion box, the placement groove is provided with a movable frame inside, the movable frame is provided with a plurality of limiting holes evenly distributed on it, the size and number of the limiting holes are adapted to the size and number of the digestion tube, and the movable frame is provided with high temperature resistant and heat-insulating handles on both sides.

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

[0017] 1. The present invention is equipped with a heat dissipation mechanism, which can play a certain auxiliary role in the heating and cooling operation of the digestion box, improve the heat preservation performance of the digestion box during the digestion process and the heat dissipation performance after digestion, avoid affecting the digestion results, and has a relatively simple structure and is easy to operate.

[0018] 2. The present invention is equipped with a quantitative injection mechanism, which can control the liquid volume inside the quantitative cylinder, thereby achieving the purpose of quantitative liquid addition. There is no need for manual liquid addition and cleaning operations, which is convenient for multiple uses, greatly reducing the labor intensity and safety risk probability of users. Moreover, the injection solution content of one quantitative cylinder can be set separately to ensure the effectiveness of the device. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of one side of the present invention.

[0020] Figure 2 This is a front view of the present invention.

[0021] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle.

[0022] Figure 4 It is a structural diagram of the present utility model.

[0023] Figure 5 For the present utility model Figure 4 Enlarged view of point B in the middle.

[0024] Figure 6 This is a schematic diagram of the groove and screw structure of this utility model.

[0025] Figure 7 This is a schematic diagram of the internal structure of this utility model.

[0026] Figure 8 For the present utility model Figure 7 Enlarged view of point C in the middle.

[0027] Figure reference numerals: base plate 101, heat insulation plate 102, support column 103, digestion box 104, mounting hole 105, heating element 106, groove 107, screw 108, sliding plate 109, cover plate 110, placement groove 111, moving frame 112, limiting hole 113, heat dissipation mechanism 200, sliding bracket 201, heat dissipation fin 202, heat insulation plate 203, heat dissipation fin 204, quantitative injection mechanism 300, liquid storage tank 301, liquid storage hole 302, quantitative cylinder 303, push plate 304, infusion tube 305, positioning block 306, gear 307, rack 308. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] Example 1

[0030] In this embodiment, if Figures 1-8As shown, a chemical oxygen demand (COD) digestion device includes a base plate 101. A heat insulation plate 102 and a support column 103 are fixedly installed on the upper end of the base plate 101. The support column 103 is located on one side of the heat insulation plate 102. A digestion box 104 is fixedly installed on the upper end of the heat insulation plate 102, which serves to isolate the base plate 101 from the digestion box 104. The digestion box 104 has several mounting holes 105 for placing digestion tubes. A heating element 106 is also installed inside the digestion box 104 to perform high-temperature heating on the digestion tubes. The heating element 106 is located below the mounting holes 105. The digestion box 104 can be made of high-density aluminum alloy material to ensure excellent thermal conductivity, thereby achieving the heating effect on the digestion tubes.

[0031] It also includes a heat dissipation mechanism 200 and a quantitative injection mechanism 300. The heat dissipation mechanism 200 is located on the outside of the digestion box 104 and is used to dissipate heat and insulate the digestion box 104. The quantitative injection mechanism 300 is located above the digestion box 104 and is used to realize the synchronous injection of different solvent liquids into the liquid storage hole 302. The quantitative injection mechanism 300 is connected to the support column 103 through a moving component, which facilitates the adjustment of the height of the quantitative injection mechanism 300 so that the quantitative cylinder 303 can correspond to the digestion tube.

[0032] The moving component includes a groove 107 formed on the surface of the support column 103, a screw 108 rotatably disposed inside the groove 107, a sliding plate 109 threaded on the screw 108, the sliding plate 109 slidably connected to the groove 107, and one end of the screw 108 extends to the outside of the support column 103 and is fixedly connected to the output end of the moving motor.

[0033] Among them, such as Figures 2-6 As shown, the heat dissipation mechanism 200 includes several sliding brackets 201. Heat sinks 202 and heat insulation plates 203 are slidably disposed inside the sliding brackets 201. Both the heat sinks 202 and the heat insulation plates 203 can be fixed to their positions relative to the sliding brackets 201 by bolts. The heat insulation plates 203 are disposed on the side of the heat sinks 202 closest to the digestion chamber 104, and are in contact with the surface of the digestion chamber 104. This effectively prevents heat loss during digestion, saving resources. Multiple heat dissipation fins 204 are fixedly disposed on the side of the heat sinks 202 away from the digestion chamber 104. When cooling is required, the heat insulation plates 203 are slid to the side of the digestion chamber 104, thereby improving heat dissipation efficiency.

[0034] Among them, such as Figures 2-8As shown, the quantitative injection mechanism 300 includes a liquid storage tank 301 fixedly connected to the slide plate 109. The liquid storage tank 301 has several liquid storage holes 302 evenly spaced inside, facilitating quantitative and synchronous injection operations and reducing the impact of time on the digestion results. Several metering cylinders 303 are arranged below the liquid storage tank 301. Each metering cylinder 303 includes a cylinder body and an injection head. The injection head is equipped with a solenoid valve for controlling its opening and closing. The metering cylinders 303 are connected to the liquid storage tank 301 via a bracket, facilitating the fixing of the metering cylinders 303. The metering cylinder 303 has a sliding push plate 304 inside. An adjustment component is provided above the metering cylinder 303 to drive the push plate 304 to move. The adjustment component enables the metered injection effect. An infusion tube 305 is connected to the push plate 304. The infusion tube 305 is made of a corrosion-resistant material with good elasticity. The other end of the infusion tube 305 is connected to the liquid storage hole 302. A control valve is provided on the infusion tube 305. The control valve is a solenoid valve-like structure for easy control. The opening and closing of the infusion tube 305 and the infusion efficiency are controlled by the control valve.

[0035] Among them, such as Figure 3 and Figure 8 As shown, the adjustment assembly includes several positioning blocks 306 fixedly installed on the lower surface of the storage tank 301. Gears 307 are rotatably installed inside each positioning block 306. One end of the shaft of each gear 307 extends to the outside of the positioning block 306 and is connected to the output end of a rotary motor. The rotary motor drives the gears 307 to rotate, which in turn drives the rack 308 to move up and down, thereby adjusting the position of the push plate 304. This ensures that the volume between the metering cylinder 303 and the push plate 304 is controllable, facilitating subsequent digestion operations. A rack 308 is meshed with one side of the gear 307. The lower end of the rack 308 is fixedly connected to the upper surface of the push plate 304. A guide hole is provided on the positioning block 306, and the rack 308 is slidably connected to the guide hole, serving as a guide and limiting element.

[0036] Among them, such as Figure 1 As shown, a control panel is provided on one side of the base plate 101. The control panel is electrically connected to the heating element 106 and the rotary motor. The control panel is also electrically connected to other electrical components for easy operation.

[0037] Among them, such as Figure 1 and Figure 4 As shown, a cover plate 110 for covering the digestion tube is slidably provided on the upper end of the digestion box 104. The cover plate 110 is fixedly connected to the digestion box 104 by bolts. Compared with the open digestion reaction, the reaction time can be greatly shortened, which is conducive to ensuring the consistency of the overall time of the device.

[0038] Among them, such as Figure 1As shown, the metering cylinder 303 has graduation lines on its outer surface. The metering cylinder 303 is made of transparent material to facilitate real-time observation of the content inside the metering cylinder 303. The number and position of the metering cylinders 303 are matched with the number and position of the liquid storage holes 302 to ensure the normal operation of the device.

[0039] Example 2

[0040] The difference from Example 1 is that, as in Example 1, Figures 4-6 As shown, it also includes a placement groove 111 on the upper surface of the digestion chamber 104. A movable frame 112 is provided inside the placement groove 111. Multiple limiting holes 113 are evenly opened on the movable frame 112. The size and number of the limiting holes 113 are adapted to the size and number of the digestion tubes. High-temperature resistant and heat-insulating carrying plates are provided on both sides of the movable frame 112. After digestion, the movable frame 112 along with all the digestion tubes containing the sample solution can be taken out by the carrying plates and placed into the dish position inside the photometer. The size of the digestion tube is adapted to the size of the photometer dish position, so that the detection results can be obtained by the photometer without titration.

[0041] In use, first place the corresponding volume of test sample solution inside the digestion tube, then place several digestion tubes inside the mounting hole 105. In the initial state, the push plate 304 is at the bottom of the metering cylinder 303. The control panel controls the rotary motor and valve body to execute corresponding commands. The rotary motor drives the gear 307 to rotate, which in turn drives the rack 308 to move upward, so that the metering cylinder 303 generates a corresponding suction force, thereby inputting the corresponding volume of solution into the metering cylinder 303. After the quantitative absorption operation is completed, the moving motor drives the screw 108 to rotate, so that the injection head on the metering cylinder 303 corresponds to the digestion tube. After the injection operation is completed, the heating plate 106 is activated to start the digestion operation.

[0042] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A chemical oxygen demand (COD) digestion device, comprising a base plate (101), wherein a heat insulation plate (102) and a support column (103) are fixedly disposed on the upper end of the base plate (101), the support column (103) is disposed on one side of the heat insulation plate (102), a digestion box (104) is fixedly disposed on the upper end of the heat insulation plate (102), the digestion box (104) is provided with a plurality of mounting holes (105) for placing digestion tubes, and a heating element (106) is also provided inside the digestion box (104), the heating element (106) being disposed below the mounting holes (105); It is characterized in that It also includes a heat dissipation mechanism (200), which is disposed on the outside of the digestion box (104) and is used to dissipate heat and insulate the digestion box (104); A quantitative injection mechanism (300) is disposed above the digestion chamber (104), and the quantitative injection mechanism (300) is connected to the support column (103) via a movable component; The movable component includes a groove (107) formed on the surface of the support column (103), a screw (108) is rotatably disposed inside the groove (107), a sliding plate (109) is threaded on the screw (108), and the sliding plate (109) is slidably connected to the groove (107).

2. The chemical oxygen demand (COD) digestion device according to claim 1, characterized in that, The heat dissipation mechanism (200) includes several sliding brackets (201). The sliding brackets (201) are slidably equipped with heat sinks (202) and heat insulation plates (203). The heat insulation plates (203) are arranged on the side of the heat sinks (202) close to the digestion box (104). Multiple heat dissipation fins (204) are fixedly arranged on the side of the heat sinks (202) away from the digestion box (104).

3. The chemical oxygen demand (COD) digestion device according to claim 1, characterized in that, The quantitative injection mechanism (300) includes a liquid storage tank (301) fixedly connected to a slide plate (109). The liquid storage tank (301) has a plurality of liquid storage holes (302) evenly spaced inside. The liquid storage tank (301) has a plurality of quantitative cylinders (303) below it. The quantitative cylinders (303) are connected to the liquid storage tank (301) through a bracket. The quantitative cylinders (303) have a push plate (304) slidably arranged inside them. The quantitative cylinders (303) have an adjustment component above them for moving the push plate (304). The push plate (304) is connected to an infusion tube (305). The other end of the infusion tube (305) is connected to the liquid storage hole (302). The infusion tube (305) is equipped with a control valve.

4. The chemical oxygen demand (COD) digestion device according to claim 3, characterized in that, The adjustment assembly includes several positioning blocks (306) fixedly disposed on the lower surface of the liquid storage tank (301). Each positioning block (306) has a gear (307) rotatably disposed inside it. One end of the shaft of the gear (307) extends to the outside of the positioning block (306) and is connected to the output end of the rotary motor. A rack (308) is meshed with one side of the gear (307). The lower end of the rack (308) is fixedly connected to the upper surface of the push plate (304). A guide hole is provided on the positioning block (306), and the rack (308) is slidably connected to the guide hole.

5. The chemical oxygen demand digestion device according to claim 1, characterized in that, A control panel is provided on one side of the base plate (101), and the control panel is electrically connected to the heating element (106) and the rotary motor.

6. The chemical oxygen demand digestion device according to claim 1, characterized in that, The digestion box (104) is slidably provided with a cover plate (110) for covering the digestion tube.

7. The chemical oxygen demand (COD) digestion device according to claim 3, characterized in that, The outer surface of the metering cylinder (303) is provided with graduation lines.

8. The chemical oxygen demand digestion device according to claim 1, characterized in that, It also includes a placement groove (111) on the upper surface of the digestion box (104), and a movable frame (112) is provided inside the placement groove (111). A plurality of limiting holes (113) are evenly opened on the movable frame (112). The size and number of the limiting holes (113) are adapted to the size and number of the digestion tube. High temperature resistant and heat-insulating handles are provided on both sides of the movable frame (112).

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