In-situ zirconia humidity and oxygen measuring instrument

Abstract

The utility model discloses an in-situ zirconia humidity and oxygen measuring instrument which comprises an output module box body, a processing circuit board is arranged in the output module box body, a measuring probe rod is arranged on the back of the output module box body, and a measuring probe shell and an inner container connecting seat are arranged at the end, away from the output module box body, of the measuring probe rod. The inner container connecting seat is nested in the measuring probe shell, a detection cavity is formed in the inner container connecting seat, two ends of the detection cavity are an air inlet end and a measuring end respectively, a molecular film and a sintering sheet are sequentially arranged at the air inlet end, a pressing ring is arranged at the front end of the sintering sheet, and a zirconium oxide sensor is arranged at the measuring end; the zirconium oxide sensor is connected with the processing circuit board through a wire, and the problems that an existing zirconium oxide oxygen measuring instrument is low in measuring precision and troublesome to maintain and replace after being used for a long time are solved.

Description

Technical Field

[0001] This utility model relates to the field of flue gas emission monitoring equipment, specifically an in-situ zirconium oxide humidity and oxygen measuring instrument. Background Technology

[0002] Zirconia oxygen sensors are directly inserted into the furnace or flue, and can quickly and accurately reflect the real-time oxygen content during combustion in the furnace, and output an electrical signal that is proportional to the oxygen content.

[0003] In existing zirconia oxygen sensors, the probe and probe rod are directly connected by threads, and the sintered plate is a certain distance from the probe. Relying solely on sensor heating and sintered plate filtration, without a zero-adjustment calibration hole, the following drawbacks exist: 1. Difficult to maintain under harsh operating conditions. When flue gas corrodes the sensor and causes inaccurate data, cleaning or replacement of the sensor is required. With the probe and probe rod directly connected, rotating the probe can cause the internal sensor transmission lines to become tangled, increasing maintenance difficulty. 2. The sintered plate is too far from the probe, resulting in a large temperature difference that causes condensation and crystallization, clogging the sintered plate and leading to inaccurate measurement data. Frequent cleaning and replacement of the sintered plate are necessary. 3. The sensor heating alone is insufficient. The low probe temperature creates a temperature difference with the flue gas, causing condensation and clogging, resulting in inaccurate measurement data and requiring frequent maintenance. 4. Sintered plate filtration alone can only remove large particles, resulting in a short instrument lifespan. 5. Without a zero-adjustment hole, drift occurs after long-term operation, requiring the probe rod to be pulled out of the flue for ventilation and zero-adjustment calibration, making maintenance inconvenient.

[0004] To solve the above problems, it is necessary to design a new in-situ zirconia humidity and oxygen measuring instrument. Utility Model Content

[0005] The purpose of this invention is to provide an in-situ zirconia humidity and oxygen measuring instrument, which aims to solve the problems of decreased measurement accuracy and troublesome maintenance and replacement of existing zirconia oxygen measuring instruments after long-term use.

[0006] This utility model is implemented as follows: An in-situ zirconia humidity and oxygen measuring instrument includes an output module housing, a processing circuit board inside the output module housing, a measuring probe on the back of the output module housing, a measuring probe shell and an inner liner connecting seat at the end of the measuring probe away from the output module housing, the inner liner connecting seat nested inside the measuring probe shell, a detection cavity inside the inner liner connecting seat, an air inlet end and a measuring end at the two ends of the detection cavity, respectively, a molecular membrane and a sintered sheet are sequentially arranged on the air inlet end, a pressure ring is arranged at the front end of the sintered sheet, a zirconia sensor is arranged on the measuring end, and the zirconia sensor and the processing circuit board are connected by wires.

[0007] As one embodiment of this utility model, a zero-adjustment calibration channel is also provided in the detection chamber, and a fluorine tube is provided in the measuring probe. One end of the fluorine tube is connected to the zero-adjustment calibration channel through a pagoda connector, and the other end of the fluorine tube is located in the output module box.

[0008] As one embodiment of this utility model, a quick-connect connector is provided in the output module housing, and the quick-connect connector is connected to a fluorine pipe.

[0009] In one embodiment of this utility model, the inner liner connecting seat and the measuring probe housing are interference fit.

[0010] As one embodiment of this utility model, a sealing groove is provided on the inner liner connecting seat, and a sealing ring is fitted on the sealing groove.

[0011] In one embodiment of this utility model, both the inner liner connecting seat and the sintered sheet have circular cross-sections, and the sintered sheet abuts against the inner liner connecting seat.

[0012] In one embodiment of this utility model, the pressure ring is circular, with its end abutting against the sintered sheet, and the pressure ring and the measuring probe housing are threaded together.

[0013] As one embodiment of this utility model, a heating rod is also provided on the inner liner connecting seat, and the heating rod is located on one side of the zirconium oxide sensor.

[0014] In one embodiment of this utility model, the front end of the zirconia sensor and the inner liner are threaded together.

[0015] As one embodiment of this utility model, a mounting disc is provided on the measuring probe.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model adopts a connection method between the measuring probe shell and the inner liner connecting seat, and then connects the zirconia sensor in the inner liner connecting seat. Then, the sintered sheet and molecular film are pressed together with a pressure ring. When disassembling and maintaining, only the pressure ring needs to be removed, which avoids the zirconia sensor from rotating and causing the wires to rotate and become entangled during disassembly, thus affecting the measurement accuracy.

[0018] 2. The sintered sheet of this utility model directly abuts against the inner liner connecting seat, and a heating rod is set in the inner liner connecting seat to make the zirconium oxide sensor heat up more fully, reduce the generation of condensation and crystallization, reduce the maintenance frequency and extend the instrument life.

[0019] 3. This utility model adds a molecular membrane between the sintered sheet and the sensor to filter out smaller impurities and corrosive substances, protect the zirconium oxide sensor, and extend the service life of the instrument.

[0020] 4. This utility model adds a zero-adjustment calibration channel. The pagoda connector and the fluorine tube are connected to the quick-connect connector on the output module housing, so that the ventilation zero-adjustment calibration can be performed without pulling the entire probe out of the flue. Attached Figure Description

[0021] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model, making other features, objects, and characteristics of the utility model more apparent. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is an exploded view of the overall structure of this utility model;

[0024] Figure 3 yes Figure 2 Enlarged view of some of the structures in the image;

[0025] Figure 4 This is a cross-sectional view of the overall structure of this utility model;

[0026] Figure 5 yes Figure 4 Enlarged view of some of the structures in the image;

[0027] In the diagram: 1. Output module housing; 11. Processing circuit board; 12. Quick connector; 2. Measuring probe; 20. Fluorine tubing; 21. Pagoda connector; 3. Measuring probe housing; 31. Inner liner connector; 310. Sealing groove; 311. Sealing ring; 30. Detection chamber; 301. Air inlet; 302. Measuring end; 303. Zeroing and calibration channel; 4. Molecular membrane; 5. Sintered sheet; 6. Pressure ring; 7. Heating rod; 8. Zirconia sensor; 81. Wire; 9. Mounting disc. Detailed Implementation

[0028] 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.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] Example 1, such as Figure 1-5 As shown, in order to improve the overall lifespan of the measurement sensor, reduce the number of maintenance operations, and improve the accuracy of the measurement.

[0031] This utility model discloses an in-situ zirconia humidity and oxygen measuring instrument, including an output module housing 1, a processing circuit board 11 is provided inside the output module housing 1, a measuring probe 2 is provided on the back of the output module housing 1, and a measuring probe shell 3 and an inner liner connecting seat 31 are provided at the end of the measuring probe 2 away from the output module housing 1.

[0032] like Figures 1 to 3 As shown, a processing circuit board 11 is installed inside the output module housing 1 for signal processing and data analysis. A measuring probe 2 is fixedly connected to the back of the output module housing 1. The distal end of the measuring probe 2 is provided with a measuring probe housing 3 and an inner liner connecting seat 31. The inner liner connecting seat 31 is nested inside the measuring probe housing 3 by an interference fit to ensure a stable structure and good sealing.

[0033] like Figure 2-3 As shown, the inner liner connector 31 is nested inside the measuring probe housing 3. The inner end of the inner liner connector 31 is connected to the zirconium oxide sensor 8, and the outer end of the inner liner connector 31 is connected to the molecular membrane 4 and the sintered sheet 5 in sequence. The front end of the sintered sheet 5 is provided with a pressure ring 6.

[0034] To reduce condensation and crystallization, a heating rod 7 is also provided on the inner liner connecting seat 31. The heating rod 7 is located on one side of the zirconia sensor 8 and is used to maintain the sensor's operating temperature and improve measurement accuracy.

[0035] The sintered sheet 5 directly abuts against the inner liner connecting seat 31, and a heating rod 7 is installed inside the inner liner connecting seat 31 to make the zirconium oxide sensor 8 heat up more fully, reduce the generation of condensation and crystallization, reduce the maintenance frequency and extend the instrument life.

[0036] like Figures 4-5 As shown, a detection chamber 30 is provided inside the inner liner connecting seat 31. The two ends of the detection chamber 30 are an air inlet end 301 and a measuring end 302, respectively. A molecular membrane 4 and a sintered sheet 5 are arranged sequentially on the air inlet end 301. A pressure ring 6 is provided at the front end of the sintered sheet 5. A zirconia sensor 8 is provided on the measuring end 302. The zirconia sensor 8 and the processing circuit board 11 are connected by a wire 81.

[0037] Molecular membrane 4 is used to filter impurities, while sintered sheet 5 uniformly disperses the gas to be measured. Adding molecular membrane 4 between sintered sheet 5 and zirconium oxide sensor 8 filters out smaller impurities and corrosive substances, protecting zirconium oxide sensor 8 and extending instrument lifespan. The front end of sintered sheet 5 is fixed by pressure ring 6, which has a circular structure. Its end face presses against sintered sheet 5 and is connected to measuring probe housing 3 via threads, ensuring stable installation of sintered sheet 5. The measuring end 302 is equipped with zirconium oxide sensor 8, which is connected to processing circuit board 11 via wire 81 for detecting oxygen content in the gas.

[0038] The inner liner connecting seat 31 and the measuring probe housing 3 are interference fit. The measuring probe housing 3 is connected to the inner liner connecting seat 31. The zirconia sensor 8 is then connected inside the inner liner connecting seat 31. The front end of the zirconia sensor 8 is threaded to the inner liner connecting seat 31. The cross-section of both the inner liner connecting seat 31 and the sintered sheet 5 is circular. The sintered sheet 5 abuts against the inner liner connecting seat 31.

[0039] like Figure 3 and Figure 5 As shown, the molecular membrane 4 and the sintered sheet 5 are pressed together by a pressure ring 6. The pressure ring 6 is circular, and the end of the pressure ring 6 abuts against the sintered sheet 5. The pressure ring 6 is threadedly connected to the measuring probe housing 3.

[0040] During disassembly and maintenance, only the pressure ring 6 needs to be removed. This avoids the zirconia sensor 8 from rotating during disassembly, which could cause the wire 91 to rotate and become entangled, affecting the measurement accuracy.

[0041] To improve sealing, a sealing groove 310 is provided on the inner liner connecting seat 31, and a sealing ring 311 is fitted on the sealing groove 310.

[0042] A mounting disc 9 is provided on the measuring probe 2, which is used for mounting and fixing to the wall.

[0043] To facilitate zeroing and calibration, a zeroing and calibration channel 303 is provided within the detection chamber 30. Simultaneously, a fluorine tube 20 passes through the measuring probe 2. One end of the fluorine tube 20 is connected to the zeroing and calibration channel 303 via a pagoda connector 21, while the other end extends into the output module housing 1 and connects to a quick-connect connector 12, facilitating the input of external calibration gas. A quick-connect connector 12 is located within the output module housing 1, connecting to the fluorine tube 20. The quick-connect connector 12 within the output module housing 1 provides a quick connection interface for the fluorine tube 20, simplifying the calibration operation.

[0044] A zero-adjustment calibration channel 303 is added, which connects to the quick-connect connector 12 on the output module housing via a pagoda connector 21 and a fluorine tube 20. This allows for ventilation zero-adjustment calibration without having to pull the entire probe out of the flue, simplifying the zero-adjustment operation.

[0045] A mounting disc 9 is located in the middle of the measuring probe 2 to fix the entire measuring instrument to the device or pipeline under test. This embodiment achieves in-situ measurement through modular design, with a compact structure and reliable sealing, and is suitable for oxygen and humidity detection in high temperature, high humidity, or corrosive environments.

[0046] Operating instructions:

[0047] When the humidity and oxygen meter is working, the heating rod 7 is turned on simultaneously when the whole device is started to ensure that the probe of the zirconia sensor 8 is fully heated and to prevent the measured gas from condensing and crystallizing. The measured gas in the flue passes through the sintered sheet 5 for the first layer of filtration, and then through the molecular membrane 4 for the second layer of filtration. It enters the detection chamber 30 and diffuses to cover the entire zirconia sensor 8. The zirconia sensor 8 performs the measurement and transmits the data to the processing circuit board 11 through the wire 81. The processing circuit board 11 converts the signal into the communication signal required by the customer and then transmits it out.

[0048] When the instrument needs to be zeroed and calibrated after long-term operation, the zeroing or calibration gas can be connected through the quick-connect connector 12 on the output module housing. After the gas enters the probe of the zirconia sensor 8 through the fluorine tube 20, the pagoda connector 21, and the zeroing and calibration channel 303, it diffuses and surrounds the zirconia sensor, allowing the instrument to be zeroed or calibrated.

[0049] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0050] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A zirconium oxide in-situ humidity oxygen measuring instrument comprising an output module box (1), characterized in that, The output module housing (1) is equipped with a processing circuit board (11). A measuring probe (2) is provided on the back of the output module housing (1). A measuring probe shell (3) and an inner liner connecting seat (31) are provided at the end of the measuring probe (2) away from the output module housing (1). The inner liner connecting seat (31) is nested in the measuring probe shell (3). A detection cavity (30) is provided in the inner liner connecting seat (31). The two ends of the detection cavity (30) are an air inlet (301) and a measuring end (302), respectively. A molecular membrane (4) and a sintered sheet (5) are arranged in sequence on the air inlet (301). A pressure ring (6) is provided at the front end of the sintered sheet (5). A zirconia sensor (8) is provided on the measuring end (302). The zirconia sensor (8) and the processing circuit board (11) are connected by a wire (81).

2. The in-situ zirconium oxide humidity oxygen measurement instrument according to claim 1, characterized in that, A zero-adjustment calibration channel (303) is also provided in the detection chamber (30), and a fluorine tube (20) is provided in the measuring probe (2). One end of the fluorine tube (20) and the zero-adjustment calibration channel (303) are connected by a pagoda connector (21), and the other end of the fluorine tube (20) is located in the output module housing (1).

3. The in-situ zirconium oxide humidity oxygen measurement instrument according to claim 2, characterized in that, A quick-connector (12) is provided inside the output module housing (1), and the quick-connector (12) is connected to the fluorine tube (20).

4. The in-situ zirconium oxide humidity oxygen measurement instrument according to claim 1, characterized in that, The inner liner connector (31) and the measuring probe housing (3) are interference fit.

5. The in-situ zirconium oxide humidity oxygen measurement instrument according to claim 4, characterized in that, A sealing groove (310) is provided on the inner liner connecting seat (31), and a sealing ring (311) is fitted on the sealing groove (310).

6. The in-situ zirconium oxide humidity oxygen measurement instrument according to claim 5, characterized in that, The inner liner connecting seat (31) and the sintered sheet (5) both have circular cross sections, and the sintered sheet (5) abuts against the inner liner connecting seat (31).

7. An in-situ zirconium oxide humidity oxygen measurement instrument according to claim 6, wherein, The pressure ring (6) is circular, and the end of the pressure ring (6) abuts against the sintered sheet (5). The pressure ring (6) and the measuring probe housing (3) are threadedly connected.

8. The in-situ zirconium oxide humidity oxygen measurement instrument according to claim 6, characterized in that, A heating rod (7) is also provided on the inner liner connecting seat (31), and the heating rod (7) is located on one side of the zirconium oxide sensor (8).

9. The in-situ zirconium oxide humidity oxygen measurement instrument according to claim 8, characterized in that, The front end of the zirconium oxide sensor (8) is threadedly connected to the inner liner connector (31).

10. The in-situ zirconium oxide humidity oxygen measurement instrument of claim 1, wherein, An installation disc (9) is provided on the measuring probe (2).

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