CN212321583U

CN212321583U - Water bath type pressure difference BOD detector

Info

Publication number: CN212321583U
Application number: CN202020401958.2U
Authority: CN
Inventors: 刘峰; 刘丹; 李蒙
Original assignee: Shandong Yiwei Detection Co ltd
Current assignee: Shandong Yiwei Detection Co ltd
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2021-01-08
Anticipated expiration: 2030-03-26

Abstract

The utility model discloses a water bath formula pressure differential BOD detector, including detecting the box, the inside of detecting the box is equipped with constant temperature water tank, the inside bottom mounting of constant temperature water tank has the heating pipe, constant temperature water tank one side is equipped with the cavity, and the inside bottom mounting of cavity has the baffle, establishes to fixed chamber between baffle and the cavity, and 4 angle position departments in fixed chamber all are fixed with the fixing base, all are connected with the guide bar on the fixing base, and the equal slip cap is equipped with solid fixed splint between the guide bar, it all is fixed in between the solid fixed splint to detect the bottle. The utility model discloses can effectively heat the water through the inside heating pipe of constant temperature water tank, the hot water after will heating pours into the thermostatic chamber into again, has realized the thermostatic control to a plurality of inside water samples of detection bottle, has guaranteed the homogeneity that every detects the bottle heating, has avoided traditional mode to need the condition that a plurality of firing equipment used, has reduced electronic component's use, has practiced thrift device manufacturing cost and later maintenance cost, and the practicality is strong.

Description

Water bath type pressure difference BOD detector

Technical Field

The utility model relates to a water pollution monitoring field specifically is a water bath formula pressure differential BOD detector.

Background

The Biochemical oxygen demand (also called Biochemical oxygen demand, abbreviated as BOD) is a comprehensive index representing the content of aerobic pollutants such as organic matters in water, and is the dissolved oxygen required in the oxidation process within a specific time by aerobic microorganisms in water to decompose the organic matters in water into inorganic matters at a certain temperature. Biochemical oxygen demand is an important water pollution parameter. The oxygen amount required for the growth and reproduction of microorganisms by using organic matters in wastewater, effluent of wastewater treatment plants and polluted water is the oxygen equivalent of degradable (available for the microorganisms) organic matters.

One of the methods for measuring BOD index is to put the instrument into an incubator, to pour a water sample of a certain volume into a culture flask according to a preselected range, and to place the culture flask in the incubator to be continuously stirred. The temperature in the incubator is controlled at 20 ℃, and the water sample is cultured for five days after being kept at the constant temperature. Sufficient dissolved oxygen must be ensured in the culture flask. The organic substances in the sample are converted into oxides of nitrogen, carbon and sulfur through biological oxidation, and in the process, the only gas carbon dioxide which comes out of the water sample is absorbed by sodium hydroxide (or potassium hydroxide). Thus, the air pressure in the bottle is reduced by an amount corresponding to the amount of dissolved oxygen consumed by the microorganisms, so that the value of BOD5 of the sample is proportional to the degree of reduction in air pressure in the bottle, and the value of BOD5 can be obtained by measuring the change in air pressure. Increasing or decreasing the amount of sample taken may increase or decrease the pressure decrease value. This allows the operator to accurately measure a wide range of BOD5 values without the need for cumbersome dilution steps.

An intelligent pressure-sensitive BOD tester is disclosed in the patent with the publication number of CN 103528915B, and the tester adopts the pressure-sensitive principle, combines a pressure-sensitive integrated module, a DIP constant-temperature reaction bottle and a microwave transmission module together, and utilizes a microcomputer control and man-machine communication system to intelligently execute and prompt the completion of the process control flow. The DIP constant temperature reaction bottle fully stirs, quickly oxygenizes and adjusts the constant temperature of the water sample, and the pressure and temperature modules modify each other to enable the dissolved oxygen and the temperature of the water sample to reach balance and dynamic balance. The pressure sensing module continuously and accurately records the pressure value in each reaction bottle, the pressure values are transmitted to the determinator through microwave wireless transmission, the BOD values of each water sample are converted into through the determinator in a unified mode, and the BOD values are displayed, analyzed, printed, stored and transmitted synchronously. And meanwhile, the measurement result is reversely transmitted to the pressure sensing integrated module, and the B0D result of the measured water sample in each reaction bottle is independently displayed. The invention has the advantages of wide measurement range, high precision, simple and safe operation and the like, and is suitable for popularization and application. However, it has the following disadvantages: need set up a semiconductor refrigeration piece in every bottle drags in the above-mentioned application, manufacturing cost and later maintenance cost are higher, and this application is direct to place the reaction bottle in external environment, very easily because of ambient temperature influences the constant temperature of device, can't guarantee the degree of accuracy of detected data, and simultaneously, it is spacing that the living and sparse reaction bottle only carries out through spacing bolt, do not fix the bottle body, most of body all exposes in the environment, easily receive the collision and empty the damage and leak, influence the testing result of device.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a water bath formula pressure differential BOD detector to solve the problem of proposing among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a water bath type pressure difference BOD detector comprises a detection box body, wherein a box cover is hinged to the top of the detection box body, a control panel is fixed to one side, away from a hinged end, of the top of the box cover, opening and closing handles are fixed to the front side and the rear side of the top of the box cover, a gripping handle is fixed to the middle of the front section of the detection box body, a constant temperature box safety, a power line socket and a switch button are sequentially fixed to the detection box body below the gripping handle, semiconductor radiating holes are fixed to the side wall of the hinged end of the detection box body and the box cover, a constant temperature water tank is arranged inside the detection box body on one side of the semiconductor radiating holes, a semiconductor refrigerator is fixed to one side, close to the semiconductor radiating holes, a heating pipe is fixed to the bottom end inside the constant temperature water tank, a water pump is fixed to the inside of the detection box body, and the bottom inside the cavity is fixed with a clapboard which is arranged into a structure shaped like a Chinese character '+', a fixed cavity is arranged between the clapboard and the cavity, fixing seats are fixed at 4 corners of the fixed cavity, springs are uniformly fixed at the middle parts of the fixing seats, the fixing seats at the two ends of each spring are connected with guide rods, fixing clamping plates are slidably sleeved between the adjacent guide rods, grooves are arranged at one sides of the fixing clamping plates, one ends of the springs, far away from the fixing seats, extend into the grooves at the same horizontal plane at the same side and are fixedly connected with the fixing clamping plates, the detection bottles are fixed inside the fixed cavity between the adjacent 4 fixing clamping plates, a thermostatic chamber is arranged inside the detection box body below the cavity, the bottom of the thermostatic chamber is connected with a pipeline, the other end of the pipeline is communicated with the output end of the water pump, one side of the thermostatic chamber is communicated with a, and a one-way valve is fixed at the communication position of the thermostatic chamber and the thermostatic water tank, magnetic stirrers are uniformly fixed in the detection box body below the thermostatic chamber, and each magnetic stirrer is positioned under each fixed cavity.

Furthermore, the inside of thermostated water tank is equipped with temperature sensor, temperature sensor and control panel electric connection, and semiconductor cooler, heating pipe, water pump, magnetic stirrers, thermostated container insurance, power cord socket and shift knob all with control panel electric connection.

Further, the magnetic rotor has been placed to the inside of detecting the bottle, and the top of detecting the bottle is fixed with the bottle plug, and the bottom of bottle plug is connected with the medicine and accomodates the cover, the bottom of medicine accomodate the cover outside bottle plug is fixed with pressure sensor, and pressure sensor is for having the pressure-sensitive module of wireless receipts and dispatch function, and pressure sensor and control panel electric connection.

Further, the outer surface of the medicine storage sleeve is uniformly provided with holes, and an alkaline medicine is placed in the medicine storage sleeve and can be sodium hydroxide or potassium hydroxide.

Furthermore, a dust screen is fixed on the detection box body outside the semiconductor heat dissipation hole.

Furthermore, a water level inspection window is arranged on the detection box body at one end, close to the semiconductor heat dissipation hole, of the gripping handle.

Furthermore, the central authorities of solid fixed splint all are equipped with the guiding hole of mutually supporting with the guide bar, and solid fixed splint keep away from one side of recess and establish to the arc structure, be equipped with anti-skidding rubber pad on the arcwall face of solid fixed splint.

Compared with the prior art, the beneficial effects of the utility model are that: the water bath type pressure difference BOD detector adopts the detection box body, the constant temperature water tank, the constant temperature chamber, the cavity and the fixed clamp plate, can effectively heat the water body in the constant temperature water tank through the heating pipe in the constant temperature water tank, then inject the heated hot water into the constant temperature chamber for heat exchange, heat the bottom of the detection bottle, further realize the constant temperature control of water samples in a plurality of detection bottles, ensure the heating uniformity of each detection bottle, avoid the condition that a plurality of heating devices are needed to be used in the traditional mode, reduce the use of electronic elements, save the production cost and later maintenance cost of the device, completely wrap the detection bottle in the detection box body, effectively reduce the influence of the external environment on the constant temperature, ensure the detection accuracy, place the detection bottle in the fixed cavity between the cavity and the partition plate, and adopt the fixed clamp plate which can slide and stretch at the corner position of each fixed cavity, so that after detection bottles with different sizes are placed in the fixed cavity, the fixed clamping plates can extrude the spring and slide towards one end of the fixed seat on the guide rod until the outer side wall of the detection bottle in the fixed cavity is attached to the arc-shaped surface of each fixed clamping plate, the detection bottle can be stably placed for detection, the detection precision of the device is ensured, the magnetic rotor in the detection bottle can stir a water sample in the bottle under the action of the magnetic stirrer, so that the water sample can be fully stirred and quickly oxygenated, carbon dioxide running out of the water sample is absorbed by sodium hydroxide, the air pressure in the bottle is reduced, the pressure drop value measured by the pressure sensor is analyzed and calculated to obtain the BOD concentration value of the water sample in the corresponding detection bottle, the device can conveniently detect the BOD of the water sample, the whole device is simple in structure, the operation is convenient, the thermostatic water tank is small in size, is environment-friendly and silent, and has smaller temperature error than that, and can set up functions such as sample constant temperature culture time, data query, temperature parameter, stirring mode according to standard national standard, the suitability is good, powerful, simultaneously, after the experiment, the inside of constant temperature water tank is taken back to the inside water of constant temperature room to the accessible water pump, through the cooling of semiconductor refrigerator to the make full use of water reduces the waste of resource.

Drawings

FIG. 1 is a schematic view of the internal structure of the inspection box of the present invention;

FIG. 2 is a schematic view of the external structure of the inspection box of the present invention;

FIG. 3 is a schematic view of the assembled rear side sectional structure of the cavity and the detection bottle of the present invention;

FIG. 4 is a schematic view of the assembled cavity and detection bottle of the present invention;

fig. 5 is a schematic view of the bottle stopper structure of the present invention.

In the figure: 1. detecting the box body; 2. a constant temperature water tank; 3. a one-way valve; 4. a semiconductor refrigerator; 5. heating a tube; 6. a water pump; 7. a magnetic stirrer; 8. detecting the bottle; 9. a thermostatic chamber; 10. a cavity; 11. a bottle stopper; 12. a control panel; 13. the handle is opened and closed; 14. a water level inspection window; 15. a grip handle; 16. the safe of the constant temperature box; 17. a power line socket; 18. a switch button; 19. a semiconductor heat dissipation hole; 20. a pressure sensor; 21. a drug storage sleeve; 22. a magnetic rotor; 23. a partition plate; 24. fixing the clamping plate; 25. a spring; 26. a guide bar; 27. a groove; 28. a fixed seat.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides an embodiment: a water bath type pressure difference BOD detector comprises a detection box body 1, a box cover is hinged to the top of the detection box body 1, a control panel 12 is fixed to one side, away from a hinged end, of the top of the box cover, opening and closing handles 13 are fixed to the front side and the rear side of the top of the box cover, a gripping handle 15 is fixed to the middle of the front section of the detection box body 1, a constant temperature box safety 16, a power line socket 17 and a switch button 18 are sequentially fixed to the detection box body 1 below the gripping handle 15, a semiconductor heat dissipation hole 19 is fixed to the side wall of the hinged end of the detection box body 1 and the box cover, a constant temperature water tank 2 is arranged inside the detection box body 1 on one side of the semiconductor heat dissipation hole 19, a semiconductor refrigerator 4 is fixed to one side, close to the semiconductor heat dissipation hole 19, of the constant temperature water tank 2 is fixed to the bottom end inside the heating, the interior of the detection box body 1 at one side of the constant temperature water tank 2, which is far away from the semiconductor refrigerator 4, is provided with a cavity 10, the bottom end of the interior of the cavity 10 is fixed with a clapboard 23, the clapboard 23 is arranged into a structure shaped like a Chinese character '+', a fixed cavity is arranged between the clapboard 23 and the cavity 10, 4 corner positions of the fixed cavity are all fixed with fixed seats 28, the middle parts of the fixed seats 28 are all uniformly fixed with springs 25, the fixed seats 28 at two ends of each spring 25 are all connected with guide rods 26, the adjacent guide rods 26 are all slidably sleeved with fixed clamping plates 24, one side of each fixed clamping plate 24 is provided with a groove 27, one end of each spring 25, which is far away from the fixed seat 28, extends into the groove 27 at the same horizontal plane at the same side and is fixedly connected with the fixed clamping plates 24, the detection bottles 8 are all fixed in the fixed cavities between the adjacent, and the bottom of thermostatic chamber 9 is connected with the pipeline, and the other end of pipeline is linked together with the output of water pump 6, and one side of thermostatic chamber 9 is linked together with thermostatic water tank 2, and thermostatic chamber 9 is fixed with check valve 3 with thermostatic water tank 2 intercommunication department, and the inside of the detection box 1 below thermostatic chamber 9 evenly is fixed with magnetic stirrers 7, and every magnetic stirrers 7 all is located under every fixed chamber.

In this embodiment, a temperature sensor is disposed inside the thermostatic water tank 2, the temperature sensor is electrically connected to the control panel 12, and the semiconductor refrigerator 4, the heating pipe 5, the water pump 6, the magnetic stirrer 7, the thermostatic water tank fuse 16, the power line socket 17 and the switch button 18 are electrically connected to the control panel 12, so that the external power supply through the power line socket 17 supplies power to the device, the locking of the device is released through the thermostatic water tank fuse 16 and the switch button 18, the semiconductor refrigerator 4, the heating pipe 5, the water pump 6 and the magnetic stirrer 7 are controlled by the control panel 12, the starting device is used, the heating temperature of the thermostatic water tank 2 is set through the control panel 12, the temperature of the water inside the thermostatic water tank 2 is sensed by the temperature sensor, the heating temperature of the heating pipe 5 to the water is controlled, and the device can perform constant temperature detection at different temperatures, the applicability of the device is improved.

In this embodiment, the magnetic rotor 22 is placed inside the detection bottle 8, the bottle plug 11 is fixed on the top of the detection bottle 8, the bottom end of the bottle plug 11 is connected with the medicine storage sleeve 21, the pressure sensor 20 is fixed on the bottom of the bottle plug 11 outside the medicine storage sleeve 21, the pressure sensor 20 is a pressure sensing module with wireless transceiving function, and the pressure sensor 20 is electrically connected with the control panel 12, so that after the magnetic stirrer 7 is powered on to work, the magnetic rotor 22 rotates under the effect of the magnetic stirrer 7 on the detection bottle 8, the purpose of fully stirring and rapidly oxygenating the water sample in the bottle is realized, the pressure sensor 20 can effectively sense the negative pressure of the air pressure inside the detection bottle 8 on the bottle plug 11, the pressure change data of the bottle mouth and the bottle plug 11 is conveniently transmitted to the control panel 12 through the pressure sensor 20 with wireless transceiving function, so that the control panel 12 directly displays the detection data result after converting into the BOD value of each water sample, the phenomenon that the traditional detection mode adopts the conduit conduction pressure to generate pressure leakage to cause data deviation is avoided, and the detection precision of the device is ensured.

In this embodiment, the surface that cover 21 was accomodate to the medicine all evenly is equipped with the hole, and the medicine is accomodate the inside of cover 21 and has been placed alkaline medicine, and alkaline medicine is sodium hydroxide, so that the carbon dioxide that generates after 8 inside water samples dissolved oxygen of detection bottle can be absorbed by sodium hydroxide, and then make the inside air pressure of detection bottle 8 reduce, the negative pressure grow, thereby the pressure variation value that locates through pressure sensor 20 response bottleneck and bottle plug 11 reachs corresponding water sample BOD numerical value, the use of the device of being convenient for.

In this embodiment, a dust screen is fixed on the detection box 1 outside the semiconductor heat dissipation hole 19 so as to isolate environmental dust, reduce the influence of dust on the work of the semiconductor refrigerator 4, ensure the heat dissipation performance of the semiconductor refrigerator 4 and prolong the service life of the device.

In this embodiment, the water level inspection window 14 is arranged on the detection box body 1 with the gripping handle 15 close to one end of the semiconductor heat dissipation hole 19, so that the water level inspection window 14 can be used for observing the internal water quantity of the constant temperature water tank 2, the internal water quantity of the constant temperature water tank 2 can be supplemented timely when being insufficient, and the device can be used continuously.

In this embodiment, the central authorities of solid fixed splint 24 all are equipped with the guiding hole of mutually supporting with guide bar 26, and solid fixed splint 24 keeps away from one side of recess 27 and establishes to the arc structure, be equipped with anti-skidding rubber pad on the arcwall face of solid fixed splint 24, so that solid fixed splint 24 spacing slip on guide bar 26 under spring 25's effort, and then adjust the interval between the solid fixed splint 24 in every fixed chamber, be convenient for laminate through curved solid fixed

splint

24 and 8 surfaces of detection bottle, be convenient for through the not unidimensional detection bottle 8 of solid fixed splint 24 clamping, thereby improve the suitability of device, and anti-skidding rubber pad can effectively improve solid fixed splint 24 and detect elasticity and the antiskid nature between the bottle 8, it warp or skid to reduce detection bottle 8 damage, be convenient for detect bottle 8 and stably place and detect, the detection precision of device has been guaranteed.

The working principle is as follows: when the device is used, an external power supply is used for supplying power to the device through the power line socket 17, the device is unlocked through the constant temperature box safe 16 and the switch button 18, related condition settings such as sample culture time, culture temperature, stirring mode and the like are carried out through the control panel 12, the heating pipe 5 is electrified to generate heat, the water body in the constant temperature water tank 2 is heated until the water body in the constant temperature water tank 2 is heated to the set culture temperature and then is stopped, the box cover is opened, the detection bottle 8 filled with a water sample to be detected is placed into the fixed cavity in the cavity 10, the detection bottle 8 extrudes the fixed clamping plate 24 in the placing process, the fixed clamping plate 24 extrudes the spring 25 and slides towards one end of the fixed seat 28 on the guide rod 26 until the outer side wall of the detection bottle 8 in the fixed cavity is attached to the arc-shaped surfaces of the 4 fixed clamping plates 24, and the stable placement, then a magnetic rotor 22 is put in each detection bottle 8, a bottle plug 11 with sodium hydroxide is plugged in the bottle mouth of the detection bottle 8, the pressed surface of the pressure sensor 20 is tightly attached to the bottle mouth, then the control device is started, the water pump 6 injects hot water in the thermostatic water tank 2 into the thermostatic chamber 9 for heat exchange, the bottom of the detection bottle 8 is heated, so as to realize thermostatic control of water samples in a plurality of detection bottles 8, then each magnetic stirrer 7 is controlled to stir according to a set mode, so as to fully stir and rapidly oxygenate the water samples in the plurality of detection bottles 8, during stirring, the balance between oxygen in the air at the upper part of the detection bottle 8 and dissolved oxygen in the water sample is broken, oxygen in the air is diffused and dissolved into liquid, so that the partial pressure of oxygen in the air is reduced, meanwhile, microorganisms in the water sample can oxidize and decompose organic matters in the water sample, the dissolved oxygen in the water is consumed and the carbon dioxide is released, the carbon dioxide running out of the water sample rises and enters the medicine containing sleeve 21 through the hole to be absorbed by the sodium hydroxide, at the moment, the air pressure in the bottle is reduced, the pressure in the detection bottle 8 is changed, and the reduced air pressure is equivalent to the dissolved oxygen consumed by the microorganism, so the pressure change in the detection bottle 8 is the change of the oxygen partial pressure consumed by the microorganism, therefore, the pressure drop value measured by the pressure sensor 20 can be wirelessly transmitted to the main control system in the control panel 12 for analysis and calculation to obtain the BOD concentration value of the water sample in the corresponding detection bottle 8, and the corresponding value is displayed through the display screen on the control panel 12 to finish the detection of the water sample, and the detection bottle 8 is completely wrapped in the detection box body 1, thereby effectively reducing the influence of the external environment on the constant temperature and ensuring the accuracy of the detection, after the experiment, accessible water pump 6 takes out the inside water of thermostatic chamber 9 inside back thermostatic water tank 2's inside, through the cooling of semiconductor cooler 4 to the make full use of water reduces the waste of resource.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a water bath formula pressure differential BOD detector, is including detecting box (1) and detecting bottle (8), its characterized in that: the top of the detection box body (1) is hinged with a box cover, one side of the top of the box cover, which is far away from a hinged end, is fixed with a control panel (12), opening and closing handles (13) are fixed on the front side and the rear side of the top of the box cover, a gripping handle (15) is fixed in the middle of the front section of the detection box body (1), a constant temperature box safety (16), a power line socket (17) and a switch button (18) are sequentially fixed on the detection box body (1) below the gripping handle (15), semiconductor heat dissipation holes (19) are fixed on the side walls of the hinged end of the detection box body (1) and the box cover, a constant temperature water tank (2) is arranged inside the detection box body (1) on one side of each semiconductor heat dissipation hole (19), a semiconductor refrigerator (4) is fixed on one side of the constant temperature water tank (2) close to the, and the inside of the bottom detection box body (1) of the constant temperature water tank (2) is fixed with a water pump (6), the input end of the water pump (6) is communicated with the constant temperature water tank (2), the inside of the detection box body (1) far away from one side of the semiconductor refrigerator (4) of the constant temperature water tank (2) is provided with a cavity (10), the bottom of the inside of the cavity (10) is fixed with a clapboard (23), the clapboard (23) is arranged into a structure shaped like Chinese character 'ji', a fixed cavity is arranged between the clapboard (23) and the cavity (10), the 4 corner positions of the fixed cavity are all fixed with a fixed base (28), the middle parts of the fixed bases (28) are all uniformly fixed with springs (25), the fixed bases (28) at the two ends of the springs (25) are both connected with guide rods (26), and fixed clamping plates (24) are all slidably sleeved between the adjacent guide rods (26), one side of each fixed clamping, and spring (25) keep away from the one end of fixing base (28) all extend to with recess (27) inside of same one side same horizontal plane and with solid fixed splint (24) fixed connection, detect bottle (8) and all be fixed in the inside in fixed chamber between adjacent 4 solid fixed splint (24), and cavity (10) below detects the inside of box (1) and is equipped with thermostatic chamber (9), and the bottom of thermostatic chamber (9) is connected with the pipeline, and the other end of pipeline is linked together with the output of water pump (6), one side of thermostatic chamber (9) is linked together with thermostatic water tank (2), and thermostatic chamber (9) and thermostatic water tank (2) intercommunication department are fixed with check valve (3), the inside that thermostatic chamber (9) below detected box (1) evenly is fixed with magnetic stirrers (7), and every magnetic stirrers (7) all are located every fixed chamber under.

2. The water bath type differential pressure BOD detector as claimed in claim 1, wherein: the inside of thermostated water tank (2) is equipped with temperature sensor, temperature sensor and control panel (12) electric connection, and semiconductor cooler (4), heating pipe (5), water pump (6), magnetic stirrers (7), thermostated container insurance (16), power cord socket (17) and shift knob (18) all are connected with control panel (12) electricity.

3. The water bath type differential pressure BOD detector as claimed in claim 2, wherein: magnetic force rotor (22) have been placed to the inside of detecting bottle (8), and the top of detecting bottle (8) is fixed with bottle plug (11), and the bottom of bottle plug (11) is connected with medicine and accomodates cover (21), the bottom of medicine accomodate cover (21) outside bottle plug (11) is fixed with pressure sensor (20), and pressure sensor (20) are for having the pressure-sensitive module of wireless receiving and dispatching function, and pressure sensor (20) and control panel (12) electric connection.

4. The water bath type differential pressure BOD detector as claimed in claim 3, wherein: the surface of medicine storage sleeve (21) all evenly is equipped with the hole, and the inside of medicine storage sleeve (21) has placed alkaline medicine, and alkaline medicine can be sodium hydroxide or potassium hydroxide.

5. The water bath type differential pressure BOD detector as claimed in claim 1, wherein: and a dust screen is fixed on the detection box body (1) at the outer side of the semiconductor heat dissipation hole (19).

6. The water bath type differential pressure BOD detector as claimed in claim 5, wherein: a water level inspection window (14) is arranged on the detection box body (1) at one end of the gripping handle (15) close to the semiconductor heat dissipation hole (19).

7. The water bath type differential pressure BOD detector as claimed in claim 1, wherein: the central authorities of solid fixed splint (24) all are equipped with the guiding hole of mutually supporting with guide bar (26), and just one side that recess (27) were kept away from to solid fixed splint (24) is established to the arc structure, be equipped with anti-skidding rubber pad on the arcwall face of solid fixed splint (24).