Special dissolved oxygen instrument electrode for BOD (Biochemical Oxygen Demand)

Abstract

The utility model discloses a special dissolved oxygen instrument electrode for BOD (Biochemical Oxygen Demand) and relates to the technical field of water body detection. The device comprises an electrode assembly, the electrode assembly comprises a probe, a thermosensitive electrode, a waterproof breathable film head and a shielding signal line, a fixed disc is arranged on the probe, a conical rubber seat is fixedly arranged on the lower surface of the fixed disc, and a U-shaped frame is fixedly arranged on the lower surface of the conical rubber seat; by arranging the stirring assembly, the stirring assembly is assembled at the bottom of the waterproof breathable film head, when the electrode assembly and the stirring assembly enter the dissolved oxygen bottle, a stirring rod in the stirring assembly stirs a water sample, so that the water sample generates a flowing effect for detection of the waterproof breathable film head, the thermosensitive electrode and the probe, and the detection precision of the water sample is improved; the conical rubber seat is arranged and seals the bottle opening of the dissolved oxygen bottle, so that external air is prevented from entering the dissolved oxygen bottle, oxygen in the air is prevented from being blended into a water sample to cause deviation, and the detection precision of the water sample is further improved.

Description

Technical Field

[0001] This utility model relates to the field of water body detection technology, specifically to an electrode for a dissolved oxygen meter for BOD. Background Technology

[0002] A BOD dissolved oxygen meter is an instrument used to measure the biological oxygen demand (BOD) in water. BOD refers to the amount of oxygen required by microorganisms to decompose organic matter under anaerobic conditions. It is an important indicator for measuring the degree of organic pollution in water. The BOD meter calculates the BOD value of the water sample by measuring the change in dissolved oxygen content.

[0003] However, existing BOD dissolved oxygen meters still have some drawbacks:

[0004] The electrodes of existing BOD dissolved oxygen meters generally do not have agitation. However, BOD dissolved oxygen meters require a certain flow rate of water sample for detection, which makes detection inconvenient and affects the accuracy of water body detection. At the same time, because the electrode sizes of different BOD dissolved oxygen meters are different, the electrode cannot form a tight seal with the dissolved oxygen bottle after being placed in the dissolved oxygen bottle. This causes oxygen in the air to be introduced into the water during the detection process, resulting in detection deviation. Utility Model Content

[0005] In order to solve the above problems, the purpose of this utility model is to provide a BOD-specific dissolved oxygen meter electrode.

[0006] To solve the above technical problems, the present invention adopts the following technical solution: a BOD-specific dissolved oxygen meter electrode, comprising an electrode assembly, the electrode assembly comprising a probe, a thermistor, a waterproof and breathable membrane head and a shielded signal line, the probe being provided with a fixing plate, a conical rubber seat being fixedly disposed on the lower surface of the fixing plate, a U-shaped frame being fixedly disposed on the lower surface of the conical rubber seat, a stirring assembly being disposed at one end of the U-shaped frame, and a disassembly assembly being disposed between the fixing plate and the probe;

[0007] The stirring assembly includes a sealed box, which is fixedly mounted on one end of a U-shaped frame. A drive motor is fixedly mounted on the inner wall of the sealed box, and a stirring shaft is fixedly mounted on the drive output end of the drive motor. The stirring shaft is rotatably connected to the bottom of the sealed box. A device disk is fixedly mounted on one end of the stirring shaft, and several stirring rods arranged in a ring array are fixedly mounted on the lower surface of the device disk.

[0008] Preferably, a first sleeve hole is provided at the axial center of the fixed plate, and a second sleeve hole is provided at the axial center of the conical rubber seat. The first sleeve hole and the second sleeve hole are vertically corresponding, and the first sleeve hole and the second sleeve hole are in movable contact with the outer wall of the probe.

[0009] Preferably, an inspection door panel is detachably installed on one side of the sealed box.

[0010] Preferably, the top of the sealing box has a first threading hole, one side of the U-shaped frame has a second threading hole, one end of the first threading hole is connected to one end of the second threading hole, the conical rubber seat has a third threading hole, the other end of the second threading hole is connected to one end of the third threading hole, and the fixed plate has a fourth threading hole, the other end of the third threading hole is connected to one end of the fourth threading hole.

[0011] Preferably, the disassembly and assembly assembly includes two grooves, which are formed on the outer wall of the fixed plate. The inner walls of the two grooves are provided with threaded holes, and the inner walls of the two threaded holes are threadedly fitted with limit screws. The outer wall of the probe is provided with a plurality of evenly distributed limit holes, and one end of the limit screw is in contact with the inner wall of the limit hole.

[0012] Preferably, a rotating seat is fixedly provided at one end of each of the two limiting screws, and a hexagonal groove is provided on one side of each of the two rotating seats.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. In this utility model, the stirring component is installed at the bottom of the waterproof and breathable membrane head. When the electrode assembly and the stirring component enter the dissolved oxygen bottle, the stirring rod in the stirring component stirs the water sample, causing the water sample to flow, which is then used by the waterproof and breathable membrane head, the thermal electrode and the probe for detection, thereby improving the detection accuracy of the water sample.

[0015] 2. In this utility model, by setting a conical rubber seat, the conical rubber seat seals the mouth of the dissolved oxygen bottle to prevent external air from entering, thereby preventing oxygen in the air from merging into the water sample and causing deviation, and further improving the detection accuracy of the water sample.

[0016] 3. In this utility model, by setting a disassembly and assembly component, the limiting screw in the disassembly and assembly component can be inserted into or separated from the limiting hole, so that the fixing plate can be fixed on the electrode assembly or detached from the electrode assembly, thus facilitating the installation and disassembly of the stirring component and improving flexibility. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an electrode for a BOD-specific dissolved oxygen meter according to this utility model.

[0019] Figure 2 This is a schematic diagram of the separation structure of the fixed disk and conical rubber seat and the electrode assembly of this utility model.

[0020] Figure 3 This utility model Figure 2 Enlarged schematic diagram of part A in the diagram.

[0021] Figure 4 This is a cross-sectional structural diagram of the fixing plate, conical rubber seat, U-shaped frame and sealing box of this utility model.

[0022] Figure 5 This utility model Figure 4 Enlarged schematic diagram of part B in the diagram.

[0023] In the diagram: 1. Electrode assembly; 11. Probe; 12. Thermistor; 13. Waterproof and breathable membrane head; 14. Shielded signal cable; 2. Fixing plate; 21. Conical rubber seat; 22. U-shaped frame; 221. First socket; 222. Second socket; 3. Stirring assembly; 31. Sealing box; 32. Drive motor; 33. Inspection door panel; 34. Stirring shaft; 35. Equipment plate; 36. Stirring rod; 37. First wire hole; 38. Second wire hole; 39. Third wire hole; 391. Fourth wire hole; 4. Disassembly and assembly assembly; 41. Groove; 42. Threaded hole; 43. Limiting screw; 44. Limiting hole; 45. Rotating seat; 46. Hexagonal groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example: Figure 1-5As shown, this utility model provides a dedicated dissolved oxygen meter electrode for BOD, including an electrode assembly 1. The electrode assembly 1 includes a probe 11, a thermistor 12, a waterproof and breathable membrane head 13, and a shielded signal line 14. When the shielded signal line 14 is connected to the connector of the dissolved oxygen detector, the waterproof and breathable membrane head 13, the thermistor 12, and the probe 11 are inserted into the dissolved oxygen bottle to detect the water sample inside the bottle. This is existing technology and will not be described in detail here. The probe 11 is equipped with a fixing plate 2, and a conical rubber seat 21 is fixedly installed on the lower surface of the fixing plate 2. By setting the conical rubber seat 21, when the conical rubber seat 21 is inserted into the bottle mouth of the dissolved oxygen bottle, the bottle mouth of the dissolved oxygen bottle can be sealed to prevent external air from entering, thereby preventing oxygen in the air from merging into the water sample and causing deviation. A U-shaped frame 22 is fixedly installed on the lower surface of the conical rubber seat 21, and the fixing plate... A first sleeve hole 221 is provided at the axial position of the 2, and a second sleeve hole 222 is provided at the axial position of the conical rubber seat 21. The first sleeve hole 221 and the second sleeve hole 222 are vertically corresponding. The first sleeve hole 221 and the second sleeve hole 222 are in movable contact with the outer wall of the probe 11. By setting the first sleeve hole 221 and the second sleeve hole 222, the fixing plate 2 and the conical rubber seat 21 can be fitted onto the probe 11. One end of the U-shaped frame 22 is provided with a stirring component 3. By setting the stirring component 3, the stirring component 3 can stir the water sample in the dissolved oxygen bottle, so that the water sample produces a flow effect. A disassembly and assembly component 4 is provided between the fixing plate 2 and the probe 11. By setting the disassembly and assembly component 4, the disassembly and assembly component 4 can facilitate the operator to fix the fixing plate 2 onto the probe 11 or separate it from the probe 11, so that the stirring component 3 can be installed on the probe 11 or separated from the probe 11, improving flexibility.

[0026] The stirring assembly 3 includes a sealed box 31, which is fixedly mounted at one end of a U-shaped frame 22. A drive motor 32 is fixedly mounted on the inner wall of the sealed box 31, and a stirring shaft 34 is fixedly mounted on the drive output end of the drive motor 32. The stirring shaft 34 is rotatably connected to the bottom of the sealed box 31. An equipment disk 35 is fixedly mounted at one end of the stirring shaft 34, and several stirring rods 36 arranged in a ring array are fixedly mounted on the lower surface of the equipment disk 35. By starting the drive motor 32, the drive shaft of the drive motor 32 can rotate the stirring shaft 34, which in turn rotates the stirring rods 36 via the equipment disk 35. The stirring rods 36 can stir the water sample in the dissolved oxygen bottle. A maintenance door 33 is detachably installed on one side of the sealed box 31. The maintenance door 33 is detachably mounted on one side of the sealed box 31 by bolts. When the maintenance door 33 is opened, it facilitates the operation of personnel. For maintenance and repair of the drive motor 32, a first wire hole 37 is provided on the top of the sealed box 31, a second wire hole 38 is provided on one side of the U-shaped frame 22, one end of the first wire hole 37 is connected to one end of the second wire hole 38, a third wire hole 39 is provided on the conical rubber seat 21, the other end of the second wire hole 38 is connected to one end of the third wire hole 39, and a fourth wire hole 391 is provided on the fixed plate 2, the other end of the third wire hole 39 is connected to one end of the fourth wire hole 391. By setting the fourth wire hole 391, the third wire hole 39, the second wire hole 38 and the first wire hole 37, when the power cable required by the drive motor 32 passes through the fourth wire hole 391, the third wire hole 39, the second wire hole 38 and the first wire hole 37 in sequence, the power cable can enter the sealed box 31 and then connect to the drive motor 32, which can conveniently realize the power supply wiring of the drive motor 32.

[0027] The disassembly / assembly assembly 4 includes two grooves 41, which are formed on the outer wall of the fixed plate 2. Each groove 41 has a threaded hole 42 on its inner wall, and a limit screw 43 is threadedly mounted on the inner wall of each threaded hole 42. The outer wall of the probe 11 has several evenly distributed limit holes 44. One end of the limit screw 43 is in movable contact with the inner wall of the limit hole 44. By setting the limit screw 43 and the limit hole 44, when the limit screw 43 is threaded into the threaded hole 42 and then into the interior of the limit hole 44, the fixed plate 2 fitted onto the probe 11 can be disassembled / mounted. The device is fixed by setting multiple vertical limiting holes 44. The installation position of the fixing plate 2 can be adjusted according to different limiting holes 44, thereby adjusting the distance between the sealing box 31 and the bottom end of the waterproof and breathable membrane head 13. One end of each of the two limiting screws 43 is fixedly provided with a rotating seat 45. One side of each of the two rotating seats 45 is provided with a hexagonal groove 46. By setting the rotating seat 45 and the hexagonal groove 46, when a hexagonal wrench is inserted into the interior of the hexagonal groove 46, the interface is rotated by the hexagonal wrench, and the rotating seat 45 causes the limiting screws 43 to rotate.

[0028] Working principle: When it is necessary to test the water sample in the dissolved oxygen bottle, the operator first puts the fixing plate 2 and the conical rubber seat 21 on the probe 11, so that the two threaded holes 42 are horizontally aligned with the two limiting holes 44. Then, the limiting screw 43 is threaded into the threaded hole 42 and the end of the limiting screw 43 enters the limiting hole 44. Then, the hex wrench is inserted into the hexagonal groove 46 and rotated. The hex wrench rotates the limiting screw 43 through the rotating seat 45. When the end of the limiting screw 43 enters the interior of the limiting hole 44, the fixing plate 2 can be fixed. At this time, the stirring assembly 3 is located at the bottom of the waterproof and breathable membrane head 13.

[0029] Subsequently, the operator vertically inserts the electrode assembly 1 into the dissolved oxygen bottle, and the stirring rod 36, waterproof and breathable membrane head 13, thermistor 12 and probe 11 make horizontal contact with the inside of the dissolved oxygen bottle. The conical rubber seat 21 is inserted into the bottle mouth of the dissolved oxygen bottle to seal the bottle mouth and prevent external air from entering.

[0030] Subsequently, the operator starts the drive motor 32. The drive shaft of the drive motor 32 causes the stirring shaft 34 to rotate. The stirring shaft 34 causes multiple stirring rods 36 to rotate through the equipment disk 35. The multiple stirring rods 36 stir the water sample in the dissolved oxygen bottle, making the water sample flow, which is used for detection by the waterproof and breathable membrane head 13, the thermal electrode 12 and the probe 11.

[0031] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A BOD specific dissolved oxygen meter electrode comprising an electrode assembly (1) characterized by: The electrode assembly (1) includes a probe (11), a thermistor (12), a waterproof and breathable membrane head (13), and a shielded signal line (14). The probe (11) is provided with a fixed plate (2). A conical rubber seat (21) is fixedly provided on the lower surface of the fixed plate (2). A U-shaped frame (22) is fixedly provided on the lower surface of the conical rubber seat (21). A stirring assembly (3) is provided at one end of the U-shaped frame (22). A disassembly assembly (4) is provided between the fixed plate (2) and the probe (11). The stirring assembly (3) includes a sealing box (31), which is fixedly installed at one end of a U-shaped frame (22). A drive motor (32) is fixedly installed on the inner wall of the sealing box (31). A stirring shaft (34) is fixedly installed at the drive output end of the drive motor (32). The stirring shaft (34) and the bottom of the sealing box (31) are rotatably connected. A device disk (35) is fixedly installed at one end of the stirring shaft (34). A number of stirring rods (36) arranged in a ring array are fixedly installed on the lower surface of the device disk (35).

2. The BOD-specific dissolved oxygen meter electrode of claim 1, wherein, The fixed plate (2) has a first sleeve hole (221) at the axial position, and the tapered rubber seat (21) has a second sleeve hole (222) at the axial position. The first sleeve hole (221) and the second sleeve hole (222) are vertically corresponding, and the first sleeve hole (221) and the second sleeve hole (222) are in movable contact with the outer wall of the probe (11).

3. The BOD-specific dissolved oxygen meter electrode of claim 1, wherein, A maintenance door panel (33) is detachably installed on one side of the sealing box (31).

4. The BOD-specific dissolved oxygen meter electrode of claim 1, wherein, The top of the sealing box (31) is provided with a first threading hole (37), and the side of the U-shaped frame (22) is provided with a second threading hole (38). One end of the first threading hole (37) is connected to one end of the second threading hole (38). The conical rubber seat (21) is provided with a third threading hole (39). The other end of the second threading hole (38) is connected to one end of the third threading hole (39). The fixed plate (2) is provided with a fourth threading hole (391). The other end of the third threading hole (39) is connected to one end of the fourth threading hole (391).

5. The BOD-specific dissolved oxygen meter electrode of claim 1, wherein, The disassembly and assembly assembly (4) includes two grooves (41), which are formed on the outer wall of the fixed plate (2). The inner walls of the two grooves (41) are provided with threaded holes (42). The inner walls of the two threaded holes (42) are threaded and rotatably installed with limit screws (43). The outer wall of the probe (11) is provided with a plurality of evenly distributed limit holes (44). One end of the limit screw (43) is in contact with the inner wall of the limit hole (44).

6. The BOD-specific dissolved oxygen meter electrode of claim 5, wherein, One end of each of the two limiting screws (43) is fixedly provided with a rotating seat (45), and one side of each of the two rotating seats (45) is provided with a hexagonal groove (46).

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