CN219552262U - Bubble-proof replaceable membrane cap structure for dissolved oxygen online analyzer - Google Patents
Bubble-proof replaceable membrane cap structure for dissolved oxygen online analyzer Download PDFInfo
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- CN219552262U CN219552262U CN202223473617.4U CN202223473617U CN219552262U CN 219552262 U CN219552262 U CN 219552262U CN 202223473617 U CN202223473617 U CN 202223473617U CN 219552262 U CN219552262 U CN 219552262U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
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Abstract
The utility model belongs to the technical field of dissolved oxygen online analyzers, and particularly relates to an anti-bubble replaceable membrane cap structure for a dissolved oxygen online analyzer. The film cap structure is arranged on the sensor body, a first thread is arranged on the front cover of the sensor body, the film cap structure comprises a protective cap, a second thread is formed on the inner wall of the protective cap, and the second thread is matched with the first thread to screw the protective cap on the front cover; the front cover is also connected with a diaphragm mounting structure, the diaphragm mounting structure is provided with a diaphragm fixing seat, a first groove is formed in the inclined mounting surface of the diaphragm fixing seat and used for placing a fluorescent diaphragm, and a first sealing piece is pressed on the fluorescent diaphragm. The utility model can quickly and conveniently replace the fluorescent film cap, and simultaneously prevent the air bubbles from adhering to the film sheet to influence the test effect when the fluorescent film cap is inserted into water for measurement.
Description
Technical Field
The utility model belongs to the technical field of dissolved oxygen online analyzers, and particularly relates to an anti-bubble replaceable membrane cap structure for a dissolved oxygen online analyzer.
Background
The dissolved oxygen on-line analyzer comprises a fluorescence method dissolved oxygen sensor, wherein the principle of the sensor is that a light source is arranged in a probe, blue light is emitted to irradiate a fluorescent layer, fluorescent substances are excited to emit red light, and because oxygen molecules can take away energy (quenching effect), the time and the intensity of the excited red light are inversely proportional to the concentration of the oxygen molecules. The concentration of oxygen molecules can be calculated by measuring the phase difference between the excitation red light and the reference light and comparing with an internal calibration value. Because the method does not consume oxygen during measurement, has stable data, reliable performance and no interference, the method is widely applied to the fields of industrial production, aquaculture, environmental monitoring, medical and health and scientific research.
The membrane caps in dissolved oxygen sensors are replaced once a year, but if the sensor is used to measure aggressive or abrasive samples, the frequency of replacement increases and the membrane caps need to be checked periodically: the transparent oxygen permeable membrane is arranged on the membrane cap, and is easy to damage; in addition, when the sensor is inserted into water for measurement, the test effect is often affected because bubbles adhere to the membrane.
Disclosure of Invention
The utility model aims to provide an anti-bubble replaceable membrane cap structure for a dissolved oxygen online analyzer, which enables a fluorescent membrane cap to be replaced quickly and conveniently, and prevents bubbles from adhering to a membrane to influence a test effect when the membrane is inserted into water for measurement.
The bubble-proof replaceable membrane cap structure comprises a protective cap, wherein a second thread is formed on the inner wall of the protective cap, and the second thread is matched with the first thread to screw the protective cap on the front cover; the front cover is also connected with a diaphragm mounting structure, the diaphragm mounting structure is provided with a diaphragm fixing seat, a first groove is formed in the inclined mounting surface of the diaphragm fixing seat and used for placing a fluorescent diaphragm, and the fluorescent diaphragm is fixed by a first sealing piece.
By adopting the technical scheme, when the dissolved oxygen online analyzer is used, the dissolved oxygen online analyzer is inserted into water, and the inclined mounting surface of the membrane fixing seat ensures that bubbles in water are not easy to adhere to the measuring membrane during measurement, so that the interference of the bubbles on the measured value of the dissolved oxygen can be effectively reduced, and the measured value is more stable; in addition, when the fluorescent membrane reaches the life, only need unscrew the protective cap, the whole diaphragm mounting structure that changes, diaphragm fixing base, fluorescent membrane, sealing member one also can change together, simultaneously owing to be provided with the locating pin, guaranteed that the fluorescent membrane is accurate with measuring the position of light path, no longer need extra too much debugging, just can resume normal measurement performance.
Preferably, there is the light path module between protecgulum and the diaphragm mounting structure, there is the locating pin on the light path module, the locating pin is used for sealing the diaphragm mounting structure with the light path module and assurance measurement accuracy.
Preferably, the first sealing member comprises a first sealing ring, the first sealing ring is fixed by a pressing ring, the first sealing ring and the pressing ring are used for sealing a gap between the fluorescent membrane and the first groove, and the gap is an annular groove.
Preferably, a circle of formed annular groove II is formed around the light path module, and a sealing ring II is arranged on the annular groove II.
By adopting the technical scheme, the sealing ring II is matched with the annular groove II, so that the tightness and the waterproofness of the device are ensured.
Preferably, a positioning hole is formed in the diaphragm mounting structure, and the positioning hole is used for inserting and fixing the positioning pin.
By adopting the technical scheme, the positioning holes are matched with the positioning pins, so that the tightness and the waterproofness of the device are ensured.
Preferably, a waterproof connector is mounted on the rear cover of the sensor body, the cable penetrates out of the sensor body and sequentially penetrates through the rear cover and the waterproof connector, and the waterproof connector is used for sealing the position where the cable penetrates.
By adopting the technical scheme, the waterproof joint prevents water from entering the position where the cable passes through, and the tightness and the waterproof property of the device are ensured.
Preferably, the cable is connected to an external signal processor.
The beneficial effects of the utility model are as follows:
firstly, the device of the utility model can quickly and conveniently replace the fluorescent film cap, is convenient to assemble, reduces parts as much as possible, reduces cost, and is specifically as follows: when the fluorescent diaphragm reaches the service life, only the protective cap is required to be unscrewed, the diaphragm mounting structure is integrally replaced, namely the diaphragm fixing seat, the fluorescent diaphragm and the sealing piece can be replaced together, and meanwhile, the positioning pin is arranged, so that the positions of the fluorescent diaphragm and the measuring light path are accurate, and normal measuring performance can be restored without excessive debugging;
secondly, the device of the utility model prevents the air bubble from adhering to the membrane to influence the test effect when being inserted into water for measurement, and specifically comprises the following steps: when the dissolved oxygen on-line analyzer is used, the dissolved oxygen on-line analyzer is inserted into water, and bubbles in water are not easy to adhere to a measuring membrane during measurement due to the inclined mounting surface of the membrane fixing seat, so that interference of the bubbles on a dissolved oxygen measuring value can be effectively reduced, and the measuring value is more stable;
thirdly, the device of the utility model has better tightness and waterproofness, does not use the traditional viscose sealing technology, greatly reduces the uncertainty of production, improves the sealing reliability of the sensor, and specifically comprises the following steps: the second sealing ring is matched with the second annular groove, the positioning hole is matched with the positioning pin, and the waterproof joint avoids water inflow at the position where the cable passes through, so that the tightness and the waterproof performance of the device are ensured;
in summary, the structure can quickly and conveniently replace the fluorescent film cap, and meanwhile, the air bubble adhesion membrane is prevented from affecting the test effect when the structure is inserted into water for measurement, and in addition, the sealing performance and the waterproof performance are good.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
FIG. 1 is a schematic view of the overall structure of the present utility model;
FIG. 2 is an exploded view of the present utility model;
FIG. 3 is a cross-sectional view of an intermediate section of the present utility model;
marked in the figure as: 1. a protective cap; 2. a fluorescent membrane; 3. a diaphragm fixing seat; 4. a positioning pin; 5. an optical path module; 6. a first sealing ring; 7. a compression ring; 8. a second sealing ring; 9. a sensor body; 10. a first thread; 11. a second thread; 12. a diaphragm mounting structure; 13. annular grooves II; 14. waterproof joint.
Detailed Description
Example 1
As shown in fig. 1 to 3, an anti-bubble replaceable membrane cap structure for a dissolved oxygen online analyzer includes a sensor body 9.
The sensor body 9 comprises a front cover, wherein the front cover is provided with an optical path module 5, threads I10 formed on the front cover are arranged around the optical path module 5, the optical path module 5 is provided with positioning pins 4, and the number of the positioning pins 4 is preferably two and the positioning pins are symmetrically arranged at two ends of the optical path module 5; the periphery of the optical path module 5 is provided with a circle of formed annular groove II 13, the height of the annular groove II 13 is higher than that of the first thread 10, the annular groove II 13 is arranged in the first thread 10, and the annular groove II 13 is also provided with a second sealing ring 8.
The sensor body 9 is provided with a membrane cap structure, the membrane cap structure comprises a membrane mounting structure 12, positioning holes are arranged in the membrane mounting structure 12, preferably, the number of the positioning holes is two, the positioning holes are used for fixing the positioning pins 4 in an inserted mode, and the matching of the positioning holes and the positioning pins 4 is used for sealing the membrane mounting structure 12 and the light path module 5, so that the tightness and the waterproofness of the device are guaranteed.
The diaphragm mounting structure 12 is provided with the diaphragm fixing seat 3, the inclined mounting surface of the diaphragm fixing seat 3 is provided with the groove I, the groove I is used for placing the fluorescent diaphragm 2, and the inclined angle of the inclined mounting surface is preferably 45 ℃, when the dissolved oxygen on-line analyzer is used, the device is inserted into water, and the inclined angle is set to be 45 ℃ so that bubbles in water are not easy to adhere to the measuring diaphragm during measurement, the interference of the bubbles on the dissolved oxygen measurement value can be effectively reduced, and the measurement value is more stable.
The fluorescent membrane 2 is fixed by a first sealing element, the first sealing element comprises a first sealing ring 6, the first sealing ring 6 is fixed by a pressing ring 7, the first sealing ring 6 and the pressing ring 7 are used for sealing a gap between the fluorescent membrane 2 and the first groove, and the gap is an annular groove I.
The membrane cap structure also comprises a protective cap 1, preferably the protective cap 1 is a hollow cylindrical shell, the inner wall of the protective cap 1 is provided with a second thread 11, the second thread 11 is matched with the first thread 10 to be used for screwing the protective cap 1 on the front cover, and the membrane mounting structure 12, the optical path module 5 and the membrane fixing seat 3 are all arranged in the protective cap 1; when the fluorescent membrane 2 reaches the service life, only the protective cap 1 is required to be unscrewed, the membrane mounting structure 12 is integrally replaced, namely, the membrane fixing seat 3, the fluorescent membrane 2 and the sealing piece can be replaced together, and meanwhile, the positioning pin 4 is arranged, so that the fluorescent membrane 2 and the measuring light path are accurately positioned, and normal measuring performance can be restored without excessive debugging.
The rear cover of the sensor body 9 is provided with a waterproof joint 14, a cable is arranged in the sensor body 9, the cable penetrates out of the sensor body 9 and sequentially penetrates through the rear cover and the waterproof joint 14, the waterproof joint 14 is used for sealing the penetrating position of the cable, and the cable is further connected with an external signal processor.
The utility model provides an anti-bubble replaceable membrane cap structure for a dissolved oxygen online analyzer, which comprises the following working processes:
firstly, the fluorescent membrane 2 is arranged in a groove I of the membrane fixing seat 3, then a sealing ring I6 is arranged in an annular groove I reserved between the fluorescent membrane 2 and the membrane fixing seat 3, and then the sealing ring I6 is tightly pressed into a pressing ring 7 for fixing, so that the annular groove I is filled with the sealing ring I to form a sealed structure, and the tightness and the waterproofness of the device are ensured.
After the diaphragm is fixed 3 and assembled, a second sealing ring 8 is placed on the second annular groove 13, then a positioning hole of the diaphragm mounting structure 12 is aligned with a positioning pin, the diaphragm mounting structure 12 and the optical path module 5 are tightly pressed, and the sealing ring 8 is deformed under stress to ensure tightness and waterproofness; finally, the protective cap 1 is screwed onto the front cover of the sensor body 9 by means of the first thread 10 and the second thread 11.
When the dissolved oxygen on-line analyzer is used, the device is inserted into water, the sensor body 9, the fluorescent light path module 5 and the fluorescent membrane 2 are matched with the concentration of oxygen molecules in the water to be measured, signals are obtained through measurement, the cable in the sensor body 9 transmits the signals to the connected external signal processor, and the signal processor processes the received signals and converts the signals into required data to be output.
When the fluorescent membrane 2 reaches the service life, only the protective cap 1 is required to be unscrewed, the membrane mounting structure 12 is integrally replaced, namely, the membrane fixing seat 3, the fluorescent membrane 2 and the sealing piece I can be replaced together, and meanwhile, the positioning pin 4 and the positioning hole are arranged, so that the accuracy of the positions of the fluorescent membrane 2, the measuring light path and the light path module 5 is ensured, and the normal measuring performance can be recovered without excessive debugging.
And the inclination angle of the installation surface where the groove I is arranged is 45 ℃, so that bubbles in water are not easy to adhere to the measurement membrane during measurement, the interference of the bubbles on the dissolved oxygen measurement value can be effectively reduced, and the measurement value is more stable.
The foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (7)
1. The bubble-proof replaceable membrane cap structure for the dissolved oxygen online analyzer is arranged on a sensor body (9), and is characterized in that a first thread (10) is arranged on a front cover of the sensor body (9), the membrane cap structure comprises a protective cap (1), a second thread (11) is formed on the inner wall of the protective cap (1), and the second thread (11) is matched with the first thread (10) and used for screwing the protective cap (1) on the front cover; the front cover is further connected with a diaphragm mounting structure (12), a diaphragm fixing seat (3) is arranged on the diaphragm mounting structure (12), a first groove is formed in the inclined mounting surface of the diaphragm fixing seat (3), the first groove is used for placing the fluorescent diaphragm (2), and the fluorescent diaphragm (2) is fixed by a first sealing piece.
2. The bubble-preventing replaceable membrane cap structure for the dissolved oxygen online analyzer according to claim 1, wherein an optical path module (5) is arranged between the front cover and the membrane mounting structure (12), a positioning pin (4) is arranged on the optical path module (5), and the positioning pin (4) is used for sealing the membrane mounting structure (12) and the optical path module (5) and guaranteeing measurement accuracy.
3. The bubble-preventing replaceable membrane cap structure for an online dissolved oxygen analyzer according to claim 1, wherein the first sealing member comprises a first sealing ring (6), the first sealing ring (6) is fixed by a pressing ring (7), and the first sealing ring (6) and the pressing ring (7) are used for sealing a gap between the fluorescent membrane (2) and the first groove, and the gap is an annular groove.
4. The bubble-preventing replaceable membrane cap structure for the dissolved oxygen online analyzer according to claim 2, wherein a circle of formed annular groove II (13) is formed around the optical path module (5), and a sealing ring II (8) is arranged on the annular groove II (13).
5. The bubble-preventing replaceable membrane cap structure for an online dissolved oxygen analyzer according to claim 2, wherein a positioning hole is formed in the membrane mounting structure (12), and the positioning hole is used for inserting and fixing the positioning pin (4).
6. The bubble-preventing replaceable membrane cap structure for an online dissolved oxygen analyzer according to claim 1, wherein a waterproof joint (14) is mounted on a rear cover of the sensor body (9), a cable is arranged in the sensor body (9), the cable penetrates out of the sensor body (9) and sequentially penetrates through the rear cover and the waterproof joint (14), and the waterproof joint (14) is used for sealing a position where the cable penetrates.
7. The bubble-preventing replaceable membrane cap structure for an online dissolved oxygen analyzer of claim 6, wherein the cable is connected to an external signal processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223473617.4U CN219552262U (en) | 2022-12-22 | 2022-12-22 | Bubble-proof replaceable membrane cap structure for dissolved oxygen online analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223473617.4U CN219552262U (en) | 2022-12-22 | 2022-12-22 | Bubble-proof replaceable membrane cap structure for dissolved oxygen online analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219552262U true CN219552262U (en) | 2023-08-18 |
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ID=87732274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223473617.4U Active CN219552262U (en) | 2022-12-22 | 2022-12-22 | Bubble-proof replaceable membrane cap structure for dissolved oxygen online analyzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219552262U (en) |
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2022
- 2022-12-22 CN CN202223473617.4U patent/CN219552262U/en active Active
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