CN202939084U - COD (Chemical Oxygen Demand) digestion instrument - Google Patents
COD (Chemical Oxygen Demand) digestion instrument Download PDFInfo
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- CN202939084U CN202939084U CN 201220623658 CN201220623658U CN202939084U CN 202939084 U CN202939084 U CN 202939084U CN 201220623658 CN201220623658 CN 201220623658 CN 201220623658 U CN201220623658 U CN 201220623658U CN 202939084 U CN202939084 U CN 202939084U
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- heating plate
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Abstract
The utility model relates to the field of detection, in particular to a COD (Chemical Oxygen Demand) digestion instrument. The COD digestion instrument comprises a control circuit board, a heating wire, a heating box, a heating plate and a control system which is used for controlling the temperature of the heating plate, wherein the outer wall of the heating box is wrapped by the heating wire; the heating wire is connected with the control circuit board; the heating plate is arranged at the top of the heating box; a plurality of heating holes are formed in the heating plate; the control system is connected with the control circuit board; and the control system is used for controlling the temperature of the heating plate through connection and disconnection of the control circuit. According to the utility model, as the heating wire is wound on the outer wall of the heating box so that the whole heating box is placed in a heated environment, the temperature of the heating box in each position is more uniform. Therefore, during the use, a container filled with samples is placed in a heating groove after penetrating through the heating holes in the heating plate and the heating degrees of the samples in different positions are as same as each other, so that the consistency, accuracy and stability of detecting results are improved.
Description
Technical field
The utility model relates to detection field, is specifically related to a kind of COD counteract appearance.
Background technology
COD refers to chemical oxygen consumption (COC), is to utilize chemical oxidizing agent (as potassium permanganate etc.) with oxidizable substance in water (as organism, nitrite, ferrous salt, sulfide etc.) oxygenolysis, then to calculate the consumption of oxygen according to the amount of residual oxygenant.COD means the important indicator of water pollution degree, is mainly used to weigh organic matter content in water, and its value is less, illustrates that the water pollution degree is lighter.
In COD test at present, usually use the COD counteract appearance, be used for heating the reaction solution that contains sample and oxygenant, make both that redox reaction occur, accelerating clearing up of sample, thereby reach the complete oxidation to the organic substance in sample, and then the chemical oxygen demand (COD) of working sample.
Existing COD counteract appearance basic structure comprises shell, heating cabinet, heater wire, wherein, heater wire is placed in shell, heater wire is the bottom outer wall that (utilizing the resistance heating principle) is directly installed on heating cabinet, type of heating is: a plurality of containers that differential responses solution is housed are placed on heating cabinet, during the heater wire heating power, heat are passed to container by heating cabinet.The defective of this kind type of heating is that the zone line temperature bottom heating cabinet is high, other regional temperatures are low, cause the sample that is placed in the middle of heating cabinet different from heating-up temperature between the sample that is placed on the edge, typical temperature is poor at least more than 3 degree, thereby cause in same testing process, the degree varies that different sample oxidations is cleared up causes, thereby has affected consistance, the Stability and veracity of test result.
The utility model content
A kind of COD counteract appearance that the utility model provides, each regional heating-up temperature of the inside of its heating cabinet is more even.
To achieve these goals, the technical solution of the utility model is achieved in that
A kind of COD counteract appearance comprises:
The control system of the described heating plate temperature of control circuit board, heater wire, heating cabinet, heating plate and control;
The outer wall of the described heating cabinet of described heater wire parcel, described outer wall comprises bottom outer wall and sidepiece outer wall, and described heater wire is connected with described control circuit board;
Described heating plate is arranged on the top at described heating cabinet, and is provided with a plurality of bottoming holes on described heating plate;
Described control system is connected with described control circuit board, and described control system is by the path and the temperature that opens circuit to control described heating plate of control circuit.
Further, described heater wire equidistantly is wrapped on the outer wall of described heating cabinet.
Further, described heating plate comprises graphite linings.
Further, described heater wire comprises metallic conduction silk and silicone rubber insulation layer.
Further, described control system comprises temperature-sensing element and temperature controller;
Described temperature-sensing element is arranged on the outer wall of described heating cabinet; Described temperature controller comprises input structure, temperature storage organization, temperature comparative structure and export structure; Described input structure is connected with described temperature-sensing element; Described temperature comparative structure is connected with described input structure, described temperature preset structure, described temperature comparative structure respectively; Described export structure is connected with described control circuit board.
Further, described temperature controller is fuzzy proportional-integral-differential PID temperature controller.
Further, described temperature-sensing element comprises platinum Pt sensitive element.
Further, described temperature controller further comprises timer, time storage organization and time comparative structure; Described timer is connected with described temperature comparative structure; Described time comparative structure is connected with described timer, described time storage organization, described export structure respectively.
Further, further comprise alarm; Described alarm is connected with described temperature comparative structure and/or described time comparative structure connects.
Further, also comprise display screen and be used for input temp and the parameter input structure of time; Described display screen is connected with described temperature controller; Described parameter input structure is connected with described temperature controller.
Compared with prior art, a kind of COD counteract appearance that the utility model provides is wrapped in heater wire the outer wall of heating cabinet, has comprised bottom outer wall and sidepiece outer wall, thereby whole heating cabinet is placed in is subjected to thermal environment, thereby each regional heating-up temperature of heating cabinet is more even.So in use, the bottoming hole that the container that fills sample is passed on heating plate is placed in heating tank, and the sample heating degree of diverse location is more consistent, thereby improves consistance, the Stability and veracity of testing result.
In addition, the utility model provides a kind of COD counteract appearance can also reach following at least a beneficial effect:
Usually add some oxygenants, strong acid or highly basic material in sample when (1) measuring COD, spill the solution that spills in testing process and can corrode or the oxidation heating cabinet, adopt graphite to make heating plate, can avoid above problem.
(2) adopt silicon rubber heater wire high temperature resistant, long service life.
(3) heater wire is wrapped in the outer wall of heating cabinet equally spacedly, heating cabinet is heated more even.
(4) input structure of fuzzy proportional-integral-differential (PID) temperature controller receives the temperature of the heating cabinet of temperature sensor detection, the temperature that obtains detecting, the simultaneous temperature comparative structure compares the temperature of detection and pre-stored temperature (detecting the temperature that needs), and comparative result is passed to export structure, export structure is controlled the connection of control circuit board and opens circuit according to comparative result, when temperature that the temperature that detects equals to set, the control control circuit board opens circuit, namely stop heating cabinet being heated, when the temperature that detects during lower than the temperature set, the control control circuit board connects, namely heating cabinet is heated.This process passing ratio-integration-differential (PID) compute mode has realized the robotization of heating cabinet temperature is controlled.
(5) Pt temperature sensor thermometric precision is high, has improved temperature control precision.
(6) when the temperature that detects during higher than the temperature set, alarm can be reported to the police with forms such as photoelectricity, and the prompting experimenter guarantees safety.
(7) setup times predetermined structure, setting-up time as required, and when temperature that the temperature that detects equals to set, timer begins timing, when the time reaches the time of setting, the time comparative structure is passed to output device with result, and then controls control circuit board and open circuit, and namely stops heating cabinet being heated.This mode unites two into one temperature control and timing, has reduced experimenter's workload, the intellectuality of the instrument of raising.
(8) when reach the time of setting heat time heating time, when namely completing heating process, alarm is reminded the experimenter by forms such as acousto-optics, improves intelligent equipment.
(9) show the temperature of current temperature, setting, the time of setting, current time etc. by display screen, more directly perceived, but and experimenter's operating parameter input structure design temperature and time, obtain better service experience.
Description of drawings
In order to be illustrated more clearly in embodiment of the present utility model, the below will do simple the introduction to the accompanying drawing of required use in embodiment, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the heating cabinet structural representation of the utility model embodiment one.
Fig. 2 is the control system structural representation of the utility model embodiment two.
Fig. 3 is the structural representation of a kind of COD counteract appearance of the utility model embodiment two.
Reference numeral:
The 1-heating plate, 2-bottoming hole, 3-heater wire, 4-heating cabinet, 5-display screen, 6-parameter input structure.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer; the below will carry out clear, complete description to the technical solution of the utility model; based on the specific embodiment of the utility model; those of ordinary skills are resulting all other embodiment under the prerequisite of not making creative work, all belong to the scope that the utility model is protected.
This use novel embodiment one provide a kind of COD counteract appearance, comprises the control system of the described heating plate temperature of control circuit board, heater wire, heating cabinet, heating plate and control;
The described heating cabinet outer wall of described heater wire parcel, described outer wall comprises bottom outer wall and sidepiece outer wall, and described heater wire is connected with described control circuit board;
Described heating plate is arranged on the top of described heating cabinet, and is provided with a plurality of bottoming holes on described heating plate;
Described control system is connected with described control circuit board, and described control system is by the path and the temperature that opens circuit to control described heating plate of control circuit.
As shown in Figure 1, the outer wall of heater wire 3 parcel heating cabinets 4, outer wall comprises bottom outer wall and sidepiece outer wall, is subjected to thermal environment thereby whole heating cabinet is placed in, thereby each regional heating-up temperature of heating cabinet is more even.So in use, the bottoming hole 2 that the container that fills sample is passed on heating plate 1 is placed in heating tank, and heater wire 3 is switched on by control circuit board, to heating cabinet 4 heating, make the sample heating degree of diverse location more consistent, thereby improve consistance, the Stability and veracity of testing result.
In order further to improve function of the present utility model and robotization, embodiment two of the present utility model provides another kind of COD counteract appearance, the control system that comprises control circuit board, heater wire, heating cabinet, heating plate, alarm, the described heating plate temperature of control, as shown in Figure 3, also comprise display screen 5 and be used for input temp and the parameter input structure 6 of time;
As shown in Figure 1, described heater wire equidistantly is wrapped on the outer wall of described heating cabinet, and described outer wall comprises bottom outer wall and sidepiece outer wall, and described heater wire is connected with described control circuit board; Described heater wire comprises metallic conduction silk and silicone rubber insulation layer;
Described heating plate comprises graphite linings;
Described heating plate is arranged on the top of described heating cabinet, and is provided with a plurality of bottoming holes on described heating plate;
As shown in Figure 2, described control system is connected with described control circuit board, and described control system is by the path and the temperature that opens circuit to control described heating plate of control circuit; Described control system comprises temperature-sensing element and temperature controller; Described temperature-sensing element is arranged on the outer wall of described heating cabinet; Described temperature controller comprises input structure, temperature storage organization, temperature comparative structure, export structure, timer, time storage organization and time comparative structure; Described input structure is connected with described temperature-sensing element; Described temperature comparative structure is connected with described input structure, described temperature preset structure, described temperature comparative structure respectively; Described export structure is connected with described control circuit board; Described timer is connected with described temperature comparative structure; Described time comparative structure is connected with described timer, described time storage organization, described export structure respectively;
Described temperature controller is fuzzy proportional-integral-differential PID temperature controller; Described temperature-sensing element comprises platinum Pt sensitive element;
Described alarm is connected with described temperature comparison means and is connected time comparative structure connection;
Described display screen 5 is connected with described temperature controller; Described parameter input structure 6 is connected with described temperature controller.
The present embodiment also has following advantage except the advantage that possesses embodiment one:
(1) described heating plate 1 can be made with any materials, wherein preferably adopt graphite material, main cause is: measure COD and usually add some oxygenants, strong acid or highly basic material in sample, the solution that spills out in testing process can corrode or the oxidation heating cabinet, and adopt graphite to make heating plate 1, can avoid above problem.
(2) described heater wire 3 heater wire of material arbitrarily, wherein preferably adopt silicon rubber heater wire 3, and this heater wire is high temperature resistant, long service life.
(3) heater wire 3 is wrapped in the outer wall of heating cabinet equally spacedly, heating cabinet 4 is heated more even.
(4) input structure of fuzzy temperature controller receives the temperature of the heating cabinet 4 of temperature sensor detection, the temperature that obtains detecting, the simultaneous temperature comparative structure compares the temperature of detection and pre-stored temperature (detecting the temperature that needs), and comparative result is passed to export structure, export structure is controlled the connection of control circuit board and opens circuit according to comparative result, when temperature that the temperature that detects equals to set, the control control circuit board opens circuit, namely stop heating cabinet being heated, when the temperature that detects during lower than the temperature set, the control control circuit board connects, namely heating cabinet is heated.This process has realized the robotization of heating cabinet temperature is controlled by the PID compute mode.
(5) described temperature sensor can adopt the sensor of any type, wherein preferably adopts the Pt temperature sensor, and this sensor thermometric precision is high, can improve the temperature control precision.
(6) when the temperature that detects during higher than the temperature set, alarm can be reported to the police with forms such as photoelectricity, and the prompting experimenter guarantees safety.
(7) setup times storage organization, setting-up time as required, and when temperature that the temperature that detects equals to set, timer begins timing, when the time reaches the time of setting, the time comparative structure is passed to output device with result, and then controls control circuit board and open circuit, and namely stops heating cabinet being heated.This mode unites two into one temperature control and timing, has reduced experimenter's workload, the intellectuality of the instrument of raising.
(8) when reach the time of setting heat time heating time, when namely completing heating process, alarm is reminded the experimenter by forms such as acousto-optics, improves intelligent equipment.Described alarm can adopt the alarm of any type, wherein preferably adopts buzzer siren, and this alarm can reach better prompting effect by form of sound.
(9) show current temperature, the temperature of setting, the time of setting, current time etc. by display screen 5, more directly perceived.But and experimenter's operating parameter input structure 6 design temperatures and time, obtain better service experience.Wherein display screen can use any display screen, preferably uses LCD or LED display, and this display screen has the advantages such as resolution is high, energy-conservation.
It should be noted that at last: above specific embodiment only in order to the technical solution of the utility model to be described, is not intended to limit; Although with reference to aforementioned specific embodiment, the utility model is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme that aforementioned embodiments is put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make essence disengaging each embodiment of the utility model of appropriate technical solution and the spirit and scope of specific embodiment technical scheme.
Claims (10)
1. a COD counteract appearance, is characterized in that, comprising:
The control system of the described heating plate temperature of control circuit board, heater wire, heating cabinet, heating plate and control;
The outer wall of the described heating cabinet of described heater wire parcel, described outer wall comprises bottom outer wall and sidepiece outer wall, and described heater wire is connected with described control circuit board;
Described heating plate is arranged on the top of described heating cabinet, and is provided with a plurality of bottoming holes on described heating plate;
Described control system is connected with described control circuit board, and described control system is by the path and the temperature that opens circuit to control described heating plate of control circuit.
2. a kind of COD counteract appearance as claimed in claim 1, is characterized in that, described heater wire equidistantly is wrapped on the outer wall of described heating cabinet.
3. a kind of COD counteract appearance as claimed in claim 1, is characterized in that, described heating plate comprises graphite linings.
4. a kind of COD counteract appearance as claimed in claim 1, is characterized in that, described heater wire comprises metallic conduction silk and silicone rubber insulation layer.
5. a kind of COD counteract appearance as claimed in claim 1, is characterized in that, described control system comprises temperature-sensing element and temperature controller;
Described temperature-sensing element is arranged on the outer wall of described heating cabinet; Described temperature controller comprises input structure, temperature storage organization, temperature comparative structure and export structure; Described input structure is connected with described temperature-sensing element; Described temperature comparative structure is connected with described input structure, described temperature storage organization, described temperature comparative structure respectively; Described export structure is connected with described control circuit board.
6. a kind of COD counteract appearance as claimed in claim 5, is characterized in that, described temperature controller is fuzzy proportional-integral-differential PID temperature controller.
7. a kind of COD counteract appearance as claimed in claim 5, is characterized in that, described temperature-sensing element comprises platinum Pt sensitive element.
8. a kind of COD counteract appearance as claimed in claim 5, is characterized in that, described temperature controller further comprises timer, time storage organization and time comparative structure; Described timer is connected with described temperature comparative structure; Described time comparative structure is connected with described timer, described time storage organization, described export structure respectively.
9. a kind of COD counteract appearance as claimed in claim 8, is characterized in that, further comprises alarm; Described alarm is connected with described temperature comparative structure and/or described time comparative structure connects.
10. a kind of COD counteract appearance as claimed in claim 8, is characterized in that, also comprises display screen and be used for input temp and the parameter input structure of time; Described display screen is connected with described temperature controller; Described parameter input structure is connected with described temperature controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220623658 CN202939084U (en) | 2012-11-22 | 2012-11-22 | COD (Chemical Oxygen Demand) digestion instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220623658 CN202939084U (en) | 2012-11-22 | 2012-11-22 | COD (Chemical Oxygen Demand) digestion instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202939084U true CN202939084U (en) | 2013-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220623658 Expired - Lifetime CN202939084U (en) | 2012-11-22 | 2012-11-22 | COD (Chemical Oxygen Demand) digestion instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202939084U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944463A (en) * | 2012-11-22 | 2013-02-27 | 赵爱国 | Chemical oxygen demand (COD) digestion instrument and working method thereof |
| CN113588396A (en) * | 2021-07-08 | 2021-11-02 | 石家庄静天环保仪器仪表供应有限公司 | COD digestion system and use method thereof |
-
2012
- 2012-11-22 CN CN 201220623658 patent/CN202939084U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944463A (en) * | 2012-11-22 | 2013-02-27 | 赵爱国 | Chemical oxygen demand (COD) digestion instrument and working method thereof |
| CN113588396A (en) * | 2021-07-08 | 2021-11-02 | 石家庄静天环保仪器仪表供应有限公司 | COD digestion system and use method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130515 Effective date of abandoning: 20150401 |
|
| RGAV | Abandon patent right to avoid regrant |