A miniaturized fluorescence dissolved oxygen sensor

Abstract

The present invention discloses a miniaturized fluorescence dissolved oxygen sensor, comprising a filtering device, wherein the filtering device comprises a horizontal tube and a vertical tube, and the horizontal tube and the vertical tube form an L-shaped tube, an opening is provided on a side of the vertical tube away from the horizontal tube, a filter cartridge is provided inside the vertical tube, and a micro motor for driving the filter cartridge is installed on the upper surface of the vertical tube, a protruding cavity is provided on the side of the vertical tube away from the opening, a mounting plate is fixedly connected to the inner surface of the protruding cavity, a brush is installed on the side of the mounting plate close to the opening, and a sewage outlet pipe is provided below the protruding cavity. The present invention provides a rotatable filter cartridge, and different positions of the filter cartridge can play a filtering role when the filter cartridge rotates, and when the filter cartridge rotates, the brush can clean up the dirt residue remaining on the outer surface of the filter cartridge, which can avoid the sewage from contacting the fluorescent membrane head on the one hand and avoid the clogging of the filter screen on the other hand.

Description

Technical Field

[0001] The invention relates to the technical field of dissolved oxygen sensors, in particular to a miniaturized fluorescence dissolved oxygen sensor. Background Art

[0002] The fluorescence dissolved oxygen meter is based on the principle of fluorescence quenching. Blue light is irradiated on the fluorescent substance to excite the fluorescent substance and emit red light. Since oxygen molecules can take away energy (quenching effect), the time and intensity of the excited red light are inversely proportional to the concentration of oxygen molecules. By measuring the phase difference between the excited red light and the reference light and comparing it with the internal calibration value, the concentration of oxygen molecules can be calculated. Existing dissolved oxygen sensors are generally small and easy to carry;

[0003] Patent application number 201520743608.3 proposes an online fluorescent dissolved oxygen sensor, which is equipped with a filter to prevent the brush head from damaging the fluorescent membrane head. However, the filter will be clogged after long-term use. Summary of the invention

[0004] The object of the present invention is to provide a miniaturized fluorescence dissolved oxygen sensor to solve the problem in the prior art that a filter is provided to avoid damage to the fluorescent membrane head by a brush head, but the filter will be clogged after long-term use.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a miniaturized fluorescence dissolved oxygen sensor, comprising a filtering device, wherein the filtering device comprises a horizontal tube and a vertical tube, and the horizontal tube and the vertical tube form an L-shaped tube, an opening is provided on the side of the vertical tube away from the horizontal tube, a filter cartridge is provided inside the vertical tube, and a micro motor for driving the filter cartridge is installed on the upper surface of the vertical tube, a protruding cavity is provided on the side of the vertical tube away from the opening, a mounting plate is fixedly connected to the inner surface of the protruding cavity, a brush is installed on the side of the mounting plate close to the opening, and a sewage outlet pipe is provided below the protruding cavity.

[0006] Preferably, the sewage outlet pipe comprises an inclined pipe and an outlet pipe, the inclined pipe is fixed at the lower end of the protruding cavity, and the outlet pipe is installed on a side of the inclined pipe away from the opening.

[0007] Preferably, it also includes a fixing ring and an electrode rod, wherein a detection window is provided in the middle of one end of the electrode rod, and a temperature sensor is installed below one end of the electrode rod, one end of the fixing ring is fixed to the horizontal tube, and the other end of the fixing ring is fixed to the electrode rod.

[0008] Preferably, a fluorescent cap is installed at the junction of the fixing ring and the electrode rod, and a fluorescent film head is provided at one end of the fluorescent cap close to the horizontal tube.

[0009] Preferably, an electrode connector is installed at one end of the electrode rod away from the horizontal tube.

[0010] Preferably, the upper end of the filter cartridge is a sealed end, and the lower end of the filter cartridge is an open end.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention is provided with a rotatable filter cartridge, and different positions of the filter cartridge can play a filtering role when it rotates, and when the filter cartridge rotates, the brush can clean up the dirt remaining on the outer surface of the filter cartridge, and the dirt brushed off by the brush can be discharged through the inclined pipe and the outlet pipe, and then the clean water can enter the interior of the horizontal pipe through the lower end opening of the filter cartridge, which can avoid the sewage from contacting the fluorescent membrane head on the one hand, and avoid the filter screen from being blocked on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 An exploded view of the present invention;

[0014] Figure 2 The present invention as a whole;

[0015] Figure 3 is a three-dimensional diagram of the filtering device of the present invention;

[0016] Figure 4 is a longitudinal sectional view of the filter device of the present invention;

[0017] Figure 5 It is a cross-sectional view of the filter device of the present invention without the filter cartridge installed;

[0018] Figure 6 is a cross-sectional view of the filter device of the present invention;

[0019] Figure 7 It is a schematic diagram of the structure of the filter cartridge of the present invention.

[0020] In the figure: 1. fixing ring; 2. filtering device; 21. horizontal tube; 22. vertical tube; 221. opening; 23. filter cartridge; 24. protruding cavity; 25. sewage outlet pipe; 251. inclined tube; 252. outlet pipe; 26. micro motor; 27. brush; 28. mounting plate; 3. fluorescent membrane head; 4. fluorescent cap; 5. detection window; 6. electrode rod; 7. temperature sensor; 8. electrode connector. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] See also Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in an embodiment of the present invention, a miniaturized fluorescence dissolved oxygen sensor includes a filter device 2, the filter device 2 includes a horizontal tube 21 and a vertical tube 22, and the horizontal tube 21 and the vertical tube 22 form an L-shaped tube, the vertical tube 22 is provided with an opening 221 on a side away from the horizontal tube 21, and a filter cartridge 23 is arranged inside the vertical tube 22, the upper end of the filter cartridge 23 is a sealed end, and the lower end of the filter cartridge 23 is an open end, and a micro motor 26 for driving the filter cartridge 23 is installed on the upper surface of the vertical tube 22, and external water enters the interior of the vertical tube 22 from the opening 221, at which time the filter cartridge 23 can filter water, and the micro motor 26 can drive the filter cartridge 23 to rotate, and different positions of the filter cartridge 23 itself can play a filtering role;

[0023] Combination Figure 4 , Figure 5 and Figure 6 As shown, a protruding cavity 24 is provided on a side of the vertical pipe 22 away from the opening 221, a mounting plate 28 is fixedly connected to the inner surface of the protruding cavity 24, and a brush 27 is installed on a side of the mounting plate 28 close to the opening 221. When the filter cartridge 23 rotates, the brush 27 can clean the dirt residue on the outer surface of the filter cartridge 23;

[0024] Combination Figure 4 and Figure 5 As shown, a sewage discharge pipe 25 is provided below the protruding cavity 24, and the sewage discharge pipe 25 includes an inclined pipe 251 and an outlet pipe 252. The inclined pipe 251 is fixed at the lower end of the protruding cavity 24, and the outlet pipe 252 is installed on the side of the inclined pipe 251 away from the opening 221. The dirt brushed off by the brush 27 can be discharged through the inclined pipe 251 and the outlet pipe 252.

[0025] Combination Figure 1 and Figure 2As shown, it also includes a fixing ring 1 and an electrode rod 6. A detection window 5 is provided in the middle of one end of the electrode rod 6, and a temperature sensor 7 is installed below one end of the electrode rod 6. The temperature sensor 7 is used to detect the water temperature. A chip should also be installed at the end of the electrode rod 6 to control the operation of the device. One end of the fixing ring 1 is fixed to the transverse tube 21, and the other end of the fixing ring 1 is fixed to the electrode rod 6. A fluorescent cap 4 is installed at the junction of the fixing ring 1 and the electrode rod 6, and a fluorescent film head 3 is provided at one end of the fluorescent cap 4 close to the transverse tube 21. An electrode connector 8 is installed at one end of the electrode rod 6 away from the transverse tube 21. This is a prior art The commonly used techniques in the art will not be described in detail here; when using the present device, external water enters the interior of the vertical tube 22 from the opening 221, at which time the filter cartridge 23 can filter the water, and the micro motor 26 can drive the filter cartridge 23 to rotate, and different positions of the filter cartridge 23 itself can play a filtering role. When the filter cartridge 23 rotates, the brush 27 can clean up the dirt remaining on the outer surface of the filter cartridge 23, and the dirt brushed off by the brush 27 can be discharged through the inclined tube 251 and the outlet tube 252, and then the clean water can enter the interior of the horizontal tube 21 through the lower end opening of the filter cartridge 23, and then contact the fluorescent membrane head 3 for detection.

[0026] The working principle and use process of the present invention are as follows: when using the device, external water enters the interior of the vertical pipe 22 from the opening 221. At this time, the filter cartridge 23 can filter water, and the micro motor 26 can drive the filter cartridge 23 to rotate. Different positions of the filter cartridge 23 itself can play a filtering role. When the filter cartridge 23 rotates, the brush 27 can clean up the dirt remaining on the outer surface of the filter cartridge 23. The dirt brushed off by the brush 27 can be discharged through the inclined tube 251 and the outlet tube 252, and then the clean water can enter the interior of the horizontal tube 21 through the lower end opening of the filter cartridge 23, and then contact the fluorescent membrane head 3 for detection.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A miniaturized fluorescence dissolved oxygen sensor, comprising a filtering device (2), characterized in that: The filtering device (2) comprises a horizontal tube (21) and a vertical tube (22), wherein the horizontal tube (21) and the vertical tube (22) form an L-shaped tube, an opening (221) is provided on a side of the vertical tube (22) away from the horizontal tube (21), a filter cartridge (23) is provided inside the vertical tube (22), and a micro motor (26) for driving the filter cartridge (23) is installed on the upper surface of the vertical tube (22), a protruding cavity (24) is provided on a side of the vertical tube (22) away from the opening (221), a mounting plate (28) is fixedly connected to the inner surface of the protruding cavity (24), a brush (27) is installed on a side of the mounting plate (28) close to the opening (221), and a sewage outlet pipe (25) is provided below the protruding cavity (24); The sewage outlet pipe (25) comprises an inclined pipe (251) and an outlet pipe (252), wherein the inclined pipe (251) is fixed to the lower end of the protruding cavity (24), and the outlet pipe (252) is installed on a side of the inclined pipe (251) away from the opening (221); It also comprises a fixing ring (1) and an electrode rod (6), wherein a detection window (5) is provided in the middle of one end of the electrode rod (6), and a temperature sensor (7) is installed below one end of the electrode rod (6), one end of the fixing ring (1) is fixed to the transverse tube (21), and the other end of the fixing ring (1) is fixed to the electrode rod (6).

2. A miniaturized fluorescence dissolved oxygen sensor according to claim 1, characterized in that: A fluorescent cap (4) is installed at the junction of the fixing ring (1) and the electrode rod (6), and a fluorescent film head (3) is provided at one end of the fluorescent cap (4) close to the transverse tube (21).

3. A miniaturized fluorescence dissolved oxygen sensor according to claim 1, characterized in that: An electrode connector (8) is installed at one end of the electrode rod (6) away from the transverse tube (21).

4. A miniaturized fluorescence dissolved oxygen sensor according to claim 1, characterized in that: The upper end of the filter cartridge (23) is a sealed end, and the lower end of the filter cartridge (23) is an open end.

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