Full-automatic biochemical oxygen demand analyzer

Abstract

The invention relates to the technical field of water sample analysis equipment, in particular to a full-automatic biochemical oxygen demand analyzer, which comprises two placing boxes with temperature control units, the placing plates are horizontally arranged and connected into the inner cavity of the placing box; the bottle body brackets are placed on the top wall of the placing plate; the sample processing control unit forms a parameter processing control area; the sample diluting unit forms a concentration diluting area; the bottle body capping unit forms a bottle cap taking and placing area; the oxygen demand detection unit forms an oxygen demand detection area; the two bottle support moving units are connected with the placing box, can be connected with the bottle body bracket and are used for enabling the bottle body bracket to move between the top wall of the placing plate and the parameter processing control area or the concentration dilution area or the bottle cap taking and placing area or the oxygen demand detection area; the method has the advantages that the workload of personnel in the biochemical oxygen demand detection process is reduced, and the accuracy of the detection result is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water sample analysis equipment, in particular to a full-automatic biochemical oxygen demand analyzer. BACKGROUND

[0002] Biochemical oxygen demand, also known as biochemical oxygen demand (Biochemical Oxygen Demand, BOD for short), is the amount of dissolved oxygen required in the oxidation process within a certain time when aerobic microorganisms in water decompose organic matter into inorganic matter at a certain temperature. It is a comprehensive index to indicate the content of oxygen-consuming pollutants such as organic matter in water. The most commonly used standard is five-day biochemical oxygen demand, that is, the water sample is cultured for 5 days under constant temperature conditions of (20±1) °C, and the concentrations of dissolved oxygen in the water sample before and after culture are measured respectively. The difference is the BOD5.

[0003] At present, the common ones are mainly daily detection of organic matter in surface water and detection of organic matter in water in and out of sewage treatment plants. Since this detection method is closely related to microorganisms, it is affected by many factors such as sample storage environment temperature, sample storage time, and some inorganic substances in the sample such as sulfide and ferrous iron consuming oxygen. The reproducibility of the measurement is poor, and the sample needs to be adjusted to a specific pH value and conductivity value before measurement, the residual chlorine effect is removed, and the sample is stirred evenly. According to the values of TOC, permanganate index or CODcr, the dilution multiple is determined. The whole pretreatment process needs to repeatedly measure various parameters of each sample, resulting in a huge workload. The sample needs to be cultured continuously for five days, the measurement period is too long, and some unexpected situations may interfere with or damage the continuity of sample culture. Therefore, in order to reduce the workload of personnel in the biochemical oxygen demand detection process and ensure the accuracy of the detection results, it is urgent to develop and design a device capable of detecting biochemical oxygen demand. SUMMARY

[0004] In order to reduce the workload of personnel in the biochemical oxygen demand detection process and ensure the accuracy of the detection results, the present application provides a full-automatic biochemical oxygen demand analyzer.

[0005] The full-automatic biochemical oxygen demand analyzer provided by the present application adopts the following technical scheme: A full-automatic biochemical oxygen demand analyzer comprises: Two hollow placement boxes, wherein a temperature control unit is arranged in the placement box; A plurality of placement plates, wherein the placement plates are arranged horizontally and connected to the inner cavity of the placement box, and the plurality of placement plates are distributed in the vertical direction; A plurality of bottle body brackets with containing areas, wherein the bottle body brackets are placed on the top wall of the placement plate, and a stretching gap is formed between the bottle body bracket and the placement plate; a sample processing control unit installed on the placing box and forming a parameter processing control area in the placing box; a sample dilution unit installed on the placing box for quantitatively extracting sample stock solution, diluent and injecting into culture bottles, and the sample dilution unit forms a concentration dilution area in the placing box; a bottle body capping unit installed on the placing box and forming a bottle cap taking and placing area in the placing box; an oxygen demand detection unit installed on the placing box and forming an oxygen demand detection area, and the oxygen demand detection area, the concentration dilution area and the bottle cap taking and placing area are located in the same cavity of the placing box; two bottle holder moving units connected with the placing box, and the bottle holder moving units can be connected with the bottle holder bracket for moving the bottle holder bracket between the top wall of the placing plate and the parameter processing control area or the concentration dilution area or the bottle cap taking and placing area or the oxygen demand detection area.

[0006] By adopting the technical scheme, the sewage sample is poured into the sample bottle, and then the sample bottle is placed on the accommodating area of the bottle holder bracket, the box door of the placing box is closed, the temperature in the cavity of the placing box is changed by the temperature control unit, the temperature of the sewage sample in the sample bottle is kept at a specified value, then the bottle holder moving unit applies force to the bottle holder bracket, the bottle holder bracket drives the sample bottle to move to the parameter processing control area, the PH value measurement and adjustment of the sewage sample in the sample bottle, the conductivity measurement, the stirring and aeration of the sewage sample are completed, then the COD value of the sewage sample is measured to determine the required dilution multiple of the sewage sample, at this time, the bottle holder moving unit applies force to the bottle holder bracket in another placing box, the bottle holder bracket drives the culture bottle to move to the concentration dilution area, then according to the measured required dilution multiple, a certain amount of sewage sample stock solution is extracted by the sample dilution unit after calculation, and a certain amount of diluent is extracted and injected into the culture bottle in the concentration dilution area, the dilution of the sewage sample is completed, after the sample dilution is completed, the bottle holder moving unit is used to reset the culture bottle, then the bottle opening of the culture bottle is sealed by the bottle sealing unit, after constant temperature culture for five days, the bottle holder moving unit is used to apply force to the bottle holder bracket, the culture bottle is first moved to the bottle cap taking and placing area to open the bottle opening of the culture bottle, and then moved to the oxygen demand detection area for biochemical oxygen demand detection; the designed full-automatic biochemical oxygen demand analyzer can form a relatively closed experimental environment through the placing box, reduce the influence of external sudden factors on the accuracy of the experimental results, and cooperate with the temperature control unit to provide a constant temperature environment for the pretreatment and later culture of the sewage sample, the placing plate and the bottle holder bracket can provide a stable accommodating area for the sample bottle or the culture bottle, the sample processing control unit can realize the pretreatment of the sewage sample, such as PH value detection and adjustment, conductivity measurement, stirring and aeration of the sewage sample, and then measurement of the COD value of the sewage sample to determine the required dilution multiple of the sewage sample, the sample dilution unit can realize accurate dilution of the sewage sample to obtain an ideal dilution multiple, the bottle sealing unit can realize opening or sealing of the bottle opening of the culture bottle, the oxygen demand detection unit can detect the biochemical oxygen demand, the bottle holder moving unit can move the bottle holder bracket between the top wall of the placing plate and the parameter processing control area or the concentration dilution area or the bottle cap taking and placing area or the oxygen demand detection area, and the movement of the bottle holder bracket realizes the movement of the sample bottle or the culture bottle, thereby realizing automatic processing of the whole process of the biochemical oxygen demand detection of the sewage sample, reducing the workload of personnel in the biochemical oxygen demand detection process, and ensuring the accuracy of the detection results.

[0007] In one specific implementation scheme, the sample processing control unit comprises: A rotating mounting disc is rotatably connected to the placing box, and the rotating axis of the rotating mounting disc is vertically arranged. A plurality of detection regulators are connected with the rotating installation disc, and the plurality of detection regulators are distributed circumferentially on the rotating installation disc, and a parameter processing control area is located below the rotating installation disc.

[0008] By adopting the technical scheme, the bottle body bracket is driven by the bottle bracket moving unit to move the sample bottle or the culture bottle to the parameter processing control area, the rotating installation disc is controlled to rotate, different detection regulators are in the state of facing the sample bottle, and then the pre-treatment of the sewage sample in the sample bottle is sequentially realized, such as PH value detection and adjustment, conductivity measurement, sewage sample stirring and aeration, and then COD value of the sewage sample is measured to determine the dilution multiple required by the sewage sample.

[0009] In a specific embodiment, a cleaning pipe is connected to the placing box, one end of the cleaning pipe is connected with a water supply end, and the detection regulator can be contacted with water flow sprayed by the cleaning pipe after the rotating installation disc rotates.

[0010] By adopting the technical scheme, the designed cleaning pipe can clean the detection regulator after the detection regulator completes the treatment of the sewage sample in the sample bottle, reduces the possibility of cross contamination between different samples, and improves the detection accuracy of the detection regulator.

[0011] In a specific embodiment, the sample dilution unit comprises: At least one stock solution injection pump is connected with the placing box, and a liquid suction area is formed at the liquid inlet end of the stock solution injection pump. At least one dilution solution injection pump is connected with the placing box, and the liquid outlet end of the dilution solution injection pump and the liquid outlet end of the stock solution injection pump are located in the same area and form a concentration dilution area.

[0012] By adopting the technical scheme, the designed sample dilution unit can realize the movement of the sewage sample from one placing box to another placing box, i.e. the movement of the sewage sample from the sample bottle to the culture bottle, without manual intervention, and can accurately extract the sewage sample and the dilution solution according to the dilution multiple, thereby improving the accuracy of the biochemical oxygen demand detection.

[0013] In a specific embodiment, the number of the stock solution injection pumps is multiple, and the effective volumes of the plurality of stock solution injection pumps are different.

[0014] By adopting the technical scheme, according to the COD value measured by the sewage sample, the dilution multiple required by the sewage sample is determined, when the dilution multiple is large, such as more than 25 times, the precision of quantitative extraction of the sewage sample greatly influences the result of the biochemical oxygen demand detection, therefore, by setting multiple original liquid injection pumps with different effective volumes, the small-volume original liquid injection pump can be used to extract the sewage sample when the dilution multiple is large, so as to guarantee the quantitative extraction precision of the sewage sample.

[0015] In one specific implementation, the bottle holder moving unit comprises: a moving bracket, and the moving bracket is capable of extending into the extension gap; a three-axis driving mechanism connected with the placing box and the moving bracket, for moving the moving bracket along three orthogonal axes.

[0016] By adopting the technical scheme, the bottle holder moving unit is designed, the moving bracket is convenient to extend into the extension gap between the placing plate and the bottle holder bracket, the three-axis driving mechanism can realize the three-dimensional movement of the moving bracket in space, and then the position movement of the bottle holder bracket between the top wall of the placing plate and the parameter processing control area, the concentration dilution area, the bottle cap taking and placing area and the oxygen demand detection area.

[0017] In one specific implementation, the three-axis driving mechanism comprises: a horizontal sliding block connected with the placing box in a sliding manner; a horizontal driving member for driving the horizontal sliding block to move horizontally, the horizontal driving member is connected with the placing box and the horizontal sliding block; a vertical driving member installed on the horizontal sliding block, and a vertical sliding block is connected with the vertical driving member, the vertical driving member is used for driving the vertical sliding block to move vertically; a reciprocating taking and placing member installed on the vertical sliding block and connected with the moving bracket, for driving the moving bracket to move in a direction perpendicular to the horizontal sliding block and the vertical sliding block.

[0018] By adopting the technical scheme, the three-axis driving mechanism is designed, the horizontal driving member can drive the horizontal sliding block to move horizontally, the vertical driving member can drive the vertical sliding block to move vertically, and the reciprocating taking and placing member can drive the moving bracket to move in a displacement plane perpendicular to the horizontal sliding block and the vertical sliding block.

[0019] In one specific implementation, the bottle body capping unit comprises: The opening and closing clamping jaws are located in the inner cavity of the placing box, and the rotation axis of the opening and closing clamping jaws is vertically arranged. The rotating mechanism for driving the opening and closing clamping jaws to rotate is connected with the placing box, and the rotating mechanism is connected with the opening and closing clamping jaws.

[0020] By adopting the technical scheme, the bottle body sealing unit can realize clamping and releasing of the water-tight sealing bottle cap on the culture bottle through the opening and closing clamping jaws, so as to realize connection or separation between the water-tight sealing cap and the culture bottle through the rotating mechanism.

[0021] In a specific embodiment, a liquid supplement pipe is connected to the bottom wall of the placing plate, a plurality of dripping openings are formed in the liquid supplement pipe, and the liquid supplement pipe is located in the same inner cavity of the placing box as the bottle cap taking and placing area.

[0022] By adopting the technical scheme, the liquid supplement pipe can supplement liquid to the water-tight sealing bottle cap at the bottle mouth of the culture bottle during the culture process, so as to guarantee the sealing effect of the culture bottle.

[0023] In summary, the present application has at least one of the following beneficial technical effects: 1. The designed full-automatic biochemical oxygen demand analyzer can form a relatively closed experimental environment through the placing box, reduce the influence of external sudden factors on the accuracy of experimental results, and provide a constant temperature environment for pre-treatment and later culture of the sewage sample through the temperature control unit. The placing plate and the bottle body bracket can provide a stable containing area for the sample bottle or the culture bottle. The sample treatment control unit can realize the pre-treatment of the sewage sample, such as PH value detection and adjustment, conductivity measurement, stirring and aeration of the sewage sample, and then measurement of the COD value of the sewage sample to determine the required dilution multiple of the sewage sample. The sample dilution unit can realize accurate dilution of the sewage sample to obtain an ideal dilution multiple. The bottle body sealing unit can realize opening or closing of the bottle mouth of the culture bottle. The oxygen demand detection unit can detect the biochemical oxygen demand. The bottle bracket moving unit can move the bottle body bracket between the top wall of the placing plate and the parameter processing control area or the concentration dilution area or the bottle cap taking and placing area or the oxygen demand detection area, and realize movement of the sample bottle or the culture bottle through movement of the bottle body bracket, thereby realizing automatic processing of the whole process of biochemical oxygen demand detection of the sewage sample, reducing the workload of personnel in the biochemical oxygen demand detection process, and guaranteeing the accuracy of the detection results.

[0024] 2. The designed full-automatic biochemical oxygen demand analyzer, after the bottle body bracket is moved to the parameter processing control area by the bottle body bracket moving unit, the different detection adjusters are in the state of being opposite to the sample bottle by rotating the installation disc, and then the pre-treatment of the sample bottle, such as PH value detection adjustment, conductivity measurement, sewage sample stirring and aeration, and then COD value measurement of the sewage sample are realized in sequence.

[0025] 3. The designed full-automatic biochemical oxygen demand analyzer, the sewage sample is moved from one placing box to another placing box by the cooperation of the stock solution injection pump and the dilution liquid injection pump, that is, the sewage sample is moved from the sample bottle to the culture bottle without manual intervention, according to the measured COD value of the sewage sample, the dilution multiple of the sewage sample is determined, when the dilution multiple is large, such as more than 25 times, the quantitative extraction precision of the sewage sample has a great influence on the biochemical oxygen demand detection result, therefore, by setting multiple stock solution injection pumps with different effective volumes, the small-volume stock solution injection pump is used for sewage sample extraction when the dilution multiple is large, so as to ensure the quantitative extraction precision of the sewage sample. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the full-automatic biochemical oxygen demand analyzer of the embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the first part structure in Figure 1

[0028] Figure 3 It is a bottom view after the horizontal plane of Figure 2

[0029] Figure 4 It is a side view after the second part of Figure 1

[0030] Figure 5 It is a vertical plane view of the second placing box in the embodiment of the present application.

[0031] Figure 6 It is a bottom view after the horizontal plane of the second placing box in the embodiment of the present application.

[0032] Figure 7 It is a vertical plane view of the placing box in the embodiment of the present application.

[0033] ​​​Explanation of reference signs: 1, placing box; 2, placing plate; 3, bottle body bracket; 4, sample processing control unit; 41, rotating installation disc; 42, detection regulator; 43, cleaning pipe; 5, sample dilution unit; 51, stock solution injection pump; 52, diluent injection pump; 6, bottle body sealing unit; 61, opening and closing clamping jaw; 62, rotating mechanism; 7, oxygen demand detection unit; 8, bottle moving unit; 81, moving bracket; 82, three-axis driving mechanism; 821, horizontal sliding block; 822, horizontal driving piece; 823, vertical driving piece; 824, vertical sliding block; 825, reciprocating taking and placing piece; 9, liquid supplementing pipe. DETAILED DESCRIPTION

[0034] The following will be described in detail below with reference to the accompanying drawings. Figures 1-7 The present application is further described in detail.

[0035] The embodiment of the present application discloses a full-automatic biochemical oxygen demand analyzer.

[0036] Referring to Figure 1 A full-automatic biochemical oxygen demand analyzer comprises two placing boxes 1, the placing box 1 is hollowly arranged, and a box door is rotationally connected to the placing box 1, so that the opening or closure of the inner cavity of the placing box 1 is realized, four universal wheels are bolted to the bottom wall of the placing box 1, so as to facilitate the position movement of the placing box 1, since the pretreatment and later culture of biochemical oxygen demand detection need to be carried out in a specific constant temperature environment, therefore, a temperature control unit is further arranged in the placing box 1, the temperature control unit can be an air conditioner or other temperature control equipment, as long as the temperature in the inner cavity of the placing box 1 can be kept constant, in the embodiment, the temperature control unit is an air conditioner, and one of the two placing boxes 1 is used for placing a sample bottle, and the other is used for placing a culture bottle, in order to facilitate the distinction, in the embodiment, the one used for placing the sample bottle is a first placing box 1, and the one used for placing the culture bottle is a second placing box 1.

[0037] Referring to Figure 2 Further, in order to fully utilize the space in the placing box 1 and improve the efficiency of biochemical oxygen demand detection, a plurality of placing plates 2 and a plurality of bottle body brackets 3 are further arranged, the placing plate 2 is horizontally arranged, and the placing plate 2 is bolted to the placing box 1, the placing plate 2 is located in the inner cavity of the placing box 1, and the plurality of placing plates 2 are distributed along the vertical direction, a plurality of accommodating areas are formed on the bottle body bracket 3, the shape of the accommodating area is matched with the size and shape of the sample bottle or the culture bottle, the bottle body bracket 3 is placed on the top wall of the placing plate 2, and a gap is formed between the bottle body bracket 3 and the placing plate 2, in order to facilitate the positioning of the bottle body bracket 3, so as to reduce the possibility of relative displacement between the bottle body bracket 3 and the placing plate 2 when the placing box 1 is moved, a plurality of limiting grooves matched with the column feet of the bottle body bracket 3 are formed in the placing plate 2.

[0038] Referring to Figure 3Further, after the sewage sample obtained by sampling is put into the sample bottle, the sewage sample needs to be pretreated in time, therefore, the sample processing control unit 4 is further included, the sample processing control unit 4 is installed on the first placing box 1, and the sample processing control unit 4 forms a parameter processing control position in the first placing box 1.

[0039] With reference to Figure 3 Specifically, the sample processing control unit 4 includes a rotating installation disc 41 and a plurality of detection adjusters 42, the rotating installation disc 41 is rotatably connected with the first placing box 1, and the rotating installation disc 41 is located in the inner cavity of the first placing box 1, and the rotating axis of the rotating installation disc 41 is vertically arranged, the detection adjusters 42 are detachably fixedly connected with the rotating installation disc 41, such as clamped or bolted, and the plurality of detection adjusters 42 are uniformly distributed on the rotating installation disc 41 in a circle, and the parameter processing control position is located below the rotating installation disc 41, in the present application, the number and type of the detection adjusters 42 can be determined according to the pretreatment process of the sewage sample, in the embodiment, after the sample bottle is moved to the parameter processing control position, the PH value measurement and adjustment of the sewage sample in the sample bottle, the conductivity measurement, the stirring and aeration of the sewage sample, and then the COD value measurement of the sewage sample are needed to be completed, so as to determine the required dilution multiple of the sewage sample, therefore, the number of the detection adjusters 42 is four, which are respectively used to complete the PH value measurement and adjustment of the sewage sample in the sample bottle, the conductivity measurement, the stirring and aeration of the sewage sample, and the COD value measurement of the sewage sample to determine the required dilution multiple of the sewage sample.

[0040] With reference to Figure 3 In order to reduce the possibility of cross contamination between two sewage samples, thereby affecting the final detection accuracy, the placing box 1 is further connected with a cleaning pipe 43, one end of the cleaning pipe 43 is connected with an external water supply end, so as to provide cleaning water to the cleaning pipe 43, and the detection adjuster 42 can be in the cleaning range of the cleaning pipe 43 after the rotating installation disc 41 rotates, that is, the water flow sprayed by the cleaning pipe 43 can contact the detection adjuster 42, so as to clean the detection adjuster 42 after the detection adjuster 42 completes the processing and detection of the current sewage sample.

[0041] With reference to Figure 4 Further, after the pretreatment of the sewage sample is completed, the dilution of the sewage sample needs to be completed according to the measured required dilution multiple, and the diluted sewage sample is transferred to the culture bottle for cultivation, therefore, the sample dilution unit 5 is further included, the sample dilution unit 5 is installed on the first placing box 1 or the second placing box 1, and is used to quantitatively extract the sample stock solution, the dilution liquid and inject into the culture bottle, and the sample dilution unit 5 forms a concentration dilution area in the second placing box 1.

[0042] With reference to Figure 4, specifically, the sample dilution unit 5 includes at least one stock solution injection pump 51 and at least one diluent injection pump 52. The stock solution injection pump 51 can be bolted to the first placement box 1 or the second placement box 1. The stock solution injection pump 51 only needs to form a liquid extraction area in the first placement box 1 and a liquid outlet area in the second placement box 1. The diluent injection pump 52 can be bolted to the first placement box 1 or the second placement box 1. The diluent injection pump 52 only needs to form a liquid outlet area in the second placement box 1, and the liquid outlet areas formed by the stock solution injection pump 51 and the diluent injection pump 52 in the second placement box 1 coincide.

[0043] Referring to Figure 4 , the number of stock solution injection pumps 51 and diluent injection pumps 52 is multiple, and the effective volumes of the multiple stock solution injection pumps 51 are different. In the embodiment, the number of stock solution injection pumps 51 is two, the effective volume of one stock solution injection pump 51 is 300ml, and the effective volume of the other stock solution injection pump 51 is 10ml. Further, when culturing a specific sample, inoculum or nitrate inhibitor and other auxiliary reagents need to be added, therefore, an auxiliary reagent injection pump is also bolted to the second placement box 1, which forms a liquid outlet area in the second placement box 1 that coincides with the stock solution injection pump 51. According to the COD value of the sewage sample, the dilution multiple required for the sewage sample is determined. When the dilution multiple is large, such as more than 25 times, the precision of the quantitative extraction of the sewage sample has a great influence on the biochemical oxygen demand detection result, therefore, by setting multiple stock solution injection pumps 51 with different effective volumes, small-capacity stock solution injection pumps 51 can be used for extracting the sewage sample when the dilution multiple is large, so as to ensure the quantitative extraction precision of the sewage sample.

[0044] Referring to Figure 5 , after the diluted sewage sample enters the culture bottle, it needs to be sealed and cultured, therefore, the bottle body capping unit 6 is also included, which is connected with the placement box 1 and forms a bottle cap taking and placing area in the inner cavity of the second placement box 1.

[0045] Referring to Figure 5 , specifically, the bottle body capping unit 6 includes an opening and closing clamp jaw 61 and a rotating mechanism 62. The opening and closing clamp jaw 61 is located in the inner cavity of the second placement box 1, and the rotation axis of the opening and closing clamp jaw 61 is vertically arranged. The opening and closing clamp jaw 61 can realize clamping or releasing of the water-tight bottle cap. The rotating mechanism 62 is bolted to the second placement box 1 and connected with the opening and closing clamp jaw 61, which is used to drive the opening and closing clamp jaw 61 to rotate. In the application, the rotating mechanism 62 can be a rotary air cylinder, a rotary motor, or other structures that can drive the opening and closing clamp jaw 61 to rotate.

[0046] Referring to Figure 5Further, the treated sewage sample needs to be detected for biochemical oxygen demand after being cultured in the culture bottle for a specified time, therefore, the biochemical oxygen demand detection unit 7 is further included, the biochemical oxygen demand detection unit 7 is installed on the second placing box 1, and the biochemical oxygen demand detection unit 7 forms a biochemical oxygen demand detection area in the second placing box 1, specifically, the biochemical oxygen demand detection unit 7 is preferably an oxygen demand detection probe.

[0047] With reference to Figure 6 Since the culture bottle adopts a water sealing bottle cap, in order to maintain the reliability of the water sealing during the culture process after the bottle opening is sealed by the opening and closing clamping jaw 61 and is placed back on the placing plate 2, an embedded groove is formed on the bottom wall of the placing plate 2, and a liquid supplement pipe 9 is connected in the embedded groove through buckling, the liquid supplement pipe 9 is connected with a water supply end outside, and the liquid supplement pipe 9 is provided with a plurality of dripping openings along the extension direction thereof, and the liquid supplement pipe 9 is located in the inner cavity of the second placing box 1.

[0048] With reference to Figure 5 And Figure 6 In order to realize the position movement of the bottle body bracket 3 between the placing plate 2 and the parameter processing control area, the concentration dilution area, the liquid extraction area / liquid discharge area, the bottle cap taking and placing area, and the biochemical oxygen demand detection area, two bottle bracket movement units 8 are further included, the two bottle bracket movement units 8 are respectively connected with the first placing box 1 and the second placing box 1, and the bottle bracket movement unit 8 is capable of being connected with the bottle body bracket 3.

[0049] With reference to Figure 6 Specifically, the bottle bracket movement unit 8 includes a movement bracket 81 and a three-axis driving mechanism 82, the movement bracket 81 is capable of extending into the extending gap between the placing plate 2 and the bottle body bracket 3, and the top wall of the movement bracket 81 is capable of abutting against the bottom wall of the bottle body bracket 3, the three-axis driving mechanism 82 is connected with the placing box 1, and the three-axis driving mechanism 82 is connected with the movement bracket 81, for moving the movement bracket 81 along three orthogonal axes in the placing box 1, so as to realize the position movement of the sample bottle or the culture bottle through the bottle body bracket 3.

[0050] With reference to Figure 6 And Figure 7Specifically, the three-axis driving mechanism 82 comprises a horizontal sliding block 821, a horizontal driving part 822, a vertical sliding block 824, a vertical driving part 823 and a reciprocating taking-and-placing part 825. A sliding rail is bolted to the inner wall of the placing box 1, the horizontal sliding block 821 is slidingly connected with the placing box 1 through the sliding rail, the horizontal driving part 822 is connected with the placing box 1, and the horizontal driving part 822 is connected with the horizontal sliding block 821, so as to drive the horizontal sliding block 821 to slide horizontally. In the application, the horizontal driving part 822 can be two horizontal driving air cylinders, or other driving structures, such as the horizontal driving part 822 comprising a horizontal driving motor, two transmission shafts and two transmission belts. The horizontal driving motor is bolted to the placing box 1, the axial directions of the two transmission shafts are vertically arranged, and the transmission shafts are rotationally connected with the placing box 1. One of the transmission shafts is coaxially keyed connected with the horizontal driving motor, and the axial ends of the transmission shaft are connected with pulleys. The two transmission belts are respectively sleeved on the two pulleys in the same horizontal region, and the upper and lower ends of the horizontal sliding block 821 are respectively connected with the two transmission belts.

[0051] With reference to Figure 7 The vertical driving part 823 is connected with the horizontal sliding block 821, and the vertical driving part 823 is connected with the vertical sliding block 824, so as to drive the vertical sliding block 824 to move in the vertical direction. In the application, the vertical driving part 823 can comprise a vertical driving air cylinder, or other driving structures. In the embodiment, the vertical driving part 823 comprises a vertical driving motor and a threaded rod. The vertical sliding block 824 is slidingly connected with the horizontal sliding block 821, the vertical driving motor is bolted to the horizontal sliding block 821, the threaded rod is coaxially keyed connected with the output shaft of the vertical driving motor, and the threaded rod penetrates through and is threadedly connected with the vertical sliding block 824.

[0052] With reference to Figure 7 The reciprocating taking-and-placing part 825 is installed on the vertical sliding block 824, and the reciprocating taking-and-placing part 825 is connected with the moving bracket 81, so as to drive the moving bracket 81 to reciprocate in a direction perpendicular to the horizontal sliding block 821 and the vertical sliding block 824. Specifically, in the application, the reciprocating taking-and-placing part 825 can comprise a reciprocating air cylinder, a reciprocating telescopic rod, or other structures, as long as it can realize the reciprocating movement of the moving bracket 81.

[0053] The implementation principle of the full-automatic biochemical oxygen demand analyzer according to an embodiment of the present application is as follows: the sampled sewage is poured into a sample bottle, then the sample bottle is placed on the accommodating area of the bottle holder 3, the door of the placing box 1 is closed, the temperature in the cavity of the placing box 1 is changed by the temperature control unit, so that the temperature of the sewage sample in the sample bottle is kept at a specified value, then the bottle holder 3 is forced to move to the parameter processing control area by the bottle holder moving unit 8, so that the PH value measurement and adjustment of the sewage sample in the sample bottle, the conductivity measurement, the stirring and aeration of the sewage sample, and then the COD value measurement of the sewage sample are completed, so as to determine the required dilution multiple of the sewage sample, at this time, the bottle holder 3 is forced to move to the concentration dilution area by the bottle holder moving unit 8, then a certain amount of sewage sample stock solution is extracted by the sample dilution unit 5 according to the calculated required dilution multiple, and a certain amount of diluent is extracted and injected into the culture bottle in the concentration dilution area, so that the dilution of the sewage sample is completed, after the sample dilution is completed, the culture bottle is reset by the bottle holder moving unit 8, then the bottle opening of the culture bottle is water-tightly sealed by the bottle sealing unit 6, after constant temperature culture for five days, the culture bottle is forced to move to the bottle cap taking and placing area to open the bottle opening of the culture bottle, and then to the oxygen demand detection area for biochemical oxygen demand detection by the bottle holder moving unit 8.

[0054] The placing box 1 can form a relatively closed experimental environment, reduce the influence of external sudden factors on the accuracy of the experimental results, and cooperate with the temperature control unit to provide a constant temperature environment for the preliminary treatment and later culture of the sewage sample, the placing plate 2 and the bottle holder 3 can provide a stable accommodating area for the sample bottle or the culture bottle, the sample processing control unit 4 can realize the preliminary treatment of the sewage sample, such as PH value detection and adjustment, conductivity measurement, stirring and aeration of the sewage sample, and then COD value measurement of the sewage sample to determine the required dilution multiple of the sewage sample, the sample dilution unit 5 can realize accurate dilution of the sewage sample to obtain an ideal dilution multiple, the bottle sealing unit 6 can realize opening or closing of the bottle opening of the culture bottle, the oxygen demand detection unit 7 can detect the biochemical oxygen demand, and the bottle holder moving unit 8 can move the bottle holder 3 between the top wall of the placing plate 2 and the parameter processing control area or the concentration dilution area or the bottle cap taking and placing area or the oxygen demand detection area, and the movement of the bottle holder 3 realizes the movement of the sample bottle or the culture bottle, thereby realizing automatic processing of the whole process of the biochemical oxygen demand detection of the sewage sample, reducing the workload of personnel in the biochemical oxygen demand detection process, and ensuring the accuracy of the detection results.

[0055] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A fully automatic biochemical oxygen demand analyzer, characterized in that: The application relates to a sample processing device, which comprises: ​ two hollow placement boxes (1) provided with temperature control units; a plurality of placement plates (2) horizontally arranged in the inner cavities of the placement boxes (1) and distributed along the vertical direction; a plurality of bottle body brackets (3) provided with accommodating areas and placed on the top walls of the placement plates (2), and the bottle body brackets (3) and the placement plates (2) are provided with an extending gap; a sample processing control unit (4) installed on the placement boxes (1) and forming a parameter processing control area in the placement boxes (1); a sample dilution unit (5) installed on the placement boxes (1) and used for quantitatively extracting sample stock solutions and dilution solutions and injecting the solutions into culture bottles, and the sample dilution unit (5) forms a concentration dilution area in the placement boxes (1); a bottle body sealing unit (6) installed on the placement boxes (1) and forming a bottle cap taking and placing area in the placement boxes (1); an oxygen demand detection unit (7) installed on the placement boxes (1) and forming an oxygen demand detection area, and the oxygen demand detection area, the concentration dilution area and the bottle cap taking and placing area are located in the same inner cavity of the placement boxes (1); two bottle support moving units (8) connected with the placement boxes (1) and capable of being connected with the bottle body brackets (3) and used for moving the bottle body brackets (3) between the top walls of the placement plates (2) and the parameter processing control area, the concentration dilution area, the bottle cap taking and placing area or the oxygen demand detection area.

2. The fully automatic biochemical COD analyzer according to claim 1, characterized in that: The sample processing control unit (4) comprises: a rotating mounting disc (41) rotatably connected to the placement boxes (1), and the rotating axis of the rotating mounting disc (41) is vertically arranged; a plurality of detection adjusters (42) connected with the rotating mounting disc (41) and circumferentially distributed on the rotating mounting disc (41), and the parameter processing control area is located below the rotating mounting disc (41).

3. The fully automatic biochemical COD analyzer according to claim 2, characterized in that: A cleaning pipe (43) is connected to the placement boxes (1), one end of the cleaning pipe (43) is connected with a water supply end, and the detection adjusters (42) can be contacted with water flow sprayed by the cleaning pipe (43) after the rotating mounting disc (41) is rotated.

4. The fully automatic biochemical COD analyzer according to claim 1, characterized in that: The sample dilution unit (5) comprises: at least one stock solution injection pump (51) connected with the placement boxes (1), and the liquid inlet end of the stock solution injection pump (51) forms a liquid extraction area; at least one dilution solution injection pump (52) connected with the placement boxes (1), and the liquid outlet end of the dilution solution injection pump (52) and the liquid outlet end of the stock solution injection pump (51) are located in the same area and form a concentration dilution area.

5. The fully automatic biochemical COD analyzer according to claim 4, characterized in that: The number of the stock solution injection pumps (51) is multiple, and the effective volumes of the multiple stock solution injection pumps (51) are different.

6. The fully automatic biochemical COD analyzer according to claim 1, characterized in that: The bottle holder moving unit (8) comprises: A moving bracket (81) capable of extending into an extension gap; A three-axis driving mechanism (82) connected with the placing box (1) and connected with the moving bracket (81) for moving the moving bracket (81) along three orthogonal axes.

7. The fully automatic biochemical COD analyzer according to claim 6, characterized in that: The three-axis driving mechanism (82) comprises: A lateral sliding block (821) slidingly connected with the placing box (1); A lateral driving member (822) for driving the lateral sliding block (821) to move horizontally, the lateral driving member (822) being connected with the placing box (1) and connected with the lateral sliding block (821); A vertical driving member (823) installed on the lateral sliding block (821) and connected with a vertical sliding block (824) for moving the vertical sliding block (824) in a vertical direction; A reciprocating taking and placing member (825) installed on the vertical sliding block (824) and connected with the moving bracket (81) for driving the moving bracket (81) to move in a direction perpendicular to the lateral sliding block (821) and the vertical sliding block (824).

8. The fully automatic biochemical COD analyzer according to claim 1, characterized in that: The bottle body sealing unit (6) comprises: An opening and closing clamp jaw (61) located in the inner cavity of the placing box (1), and the rotation axis of the opening and closing clamp jaw (61) is vertically arranged; A rotating mechanism (62) for driving the opening and closing clamp jaw (61) to rotate, the rotating mechanism (62) being connected with the placing box (1) and connected with the opening and closing clamp jaw (61).

9. The fully automatic biochemical COD analyzer according to claim 8, characterized in that: A liquid supplement pipe (9) is connected to the bottom wall of the placing plate (2), a plurality of dripping openings are formed in the liquid supplement pipe (9), and the liquid supplement pipe (9) and the bottle cap taking and placing area are located in the same inner cavity of the placing box (1).

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