A breathing port and zirconium oxide detector

Abstract

The utility model relates to a breathing port and a zirconium oxide detector. The utility model includes a gas connector, which is provided with a through hole along its axial direction, and the gas connector includes an air inlet end and a connecting end which are arranged oppositely; the connecting end has a connecting structure for connecting to a shell in the zirconium oxide detector, and an explosion-proof structure is provided on the side of the through hole close to the connecting end; a waterproof and breathable structure is installed on the side of the through hole close to the air inlet end, and the waterproof and breathable structure allows gas to pass through but prevents water from passing through. The breathing port of the utility model can effectively prevent rainwater from passing through, ensuring that the detector can work normally even in heavy rain, ensuring the stable operation of the zirconium tube in a high temperature environment, and avoiding damage to the zirconium core caused by temperature changes. The explosion-proof structure increases the safety of the equipment, so that even when it works in a humid or flammable gas environment, it can effectively prevent safety hazards caused by sudden changes in internal gas pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of zirconium oxide oxygen analyzers, in particular to a breathing port and a zirconium oxide detector. Background Art

[0002] The principle of the zirconia oxygen analyzer is based on the concentration potential phenomenon in electrochemistry. The device uses zirconia as a solid electrolyte and installs porous platinum electrodes on both sides. When zirconia works at high temperatures (800°C for Fuji zirconia detector), the oxygen concentration in the gas on both sides is different, and a potential will be generated between the platinum electrodes. This phenomenon is called concentration potential. This potential is related to the oxygen concentration on both sides, and the oxygen content in the measured gas can be determined by measuring this potential.

[0003] Specifically, when zirconia is heated to a temperature above 800°C, it forms a stable relationship between the potential and the operating temperature and the oxygen concentration on both sides. By measuring the potential difference on both sides of the zirconia tube, the oxygen concentration in the measured gas can be calculated. This method does not require direct measurement of oxygen molecules, but indirectly measures the potential changes caused by the migration and accumulation of oxygen ions in the electrolyte. In practical applications, it is very important to ensure that the pressure between the measured gas and the reference gas is equal to ensure that the ratio of oxygen partial pressures can accurately reflect the ratio of oxygen concentrations. In addition, the key to the normal measurement of the zirconia detector is to require a stable automatic heating temperature control loop to ensure constant temperature. The zirconia oxygen analyzer needs to control the temperature at 800±1°C to eliminate the influence of temperature on the measurement results.

[0004] The housing of the existing zirconia oxygen analyzer detector is provided with a breathing port with a flame arrester to connect to the reference side of the inner cavity of the zirconia tube. Usually, the detector is installed horizontally, and at this time, the three vents of the breathing port are located at the bottom, which prevents rainwater from entering the housing and ensures the normal use of the zirconia oxygen analyzer detector.

[0005] However, in some cases, the detector of the zirconia oxygen analyzer is installed vertically downward. This installation method causes the breathing port to be in a horizontal position, and the three vents are located above and on the side. In summer rainstorms, rainwater can easily enter the shell through the vents. The high temperature and sudden rainfall in summer cause the shell temperature to drop, and negative pressure is generated inside the shell, which further causes rainwater to be sucked into the shell. This will cause rainwater to enter and damage the zirconium core of the detector, because the shell not only has a terminal, but also connects the reference side of the inner cavity of the zirconium tube. The zirconium tube is heated to 800°C when in use. The entry of rainwater will cause the zirconium core to burst. The burst zirconium core cannot isolate the measured end from the reference end, resulting in gas circulation inside and outside, reducing or eliminating the oxygen concentration difference, causing the measured value to run to the maximum, causing the zirconia oxygen analyzer to be accidentally damaged, thereby destroying the normal operation of the detector. In addition, although installing a rain cover is a solution to avoid this situation, it will cause the detector temperature to be too high, thereby affecting the life of the detector. Summary of the invention

[0006] Therefore, the technical problem to be solved by the utility model is to overcome the technical problem in the prior art that when the zirconia oxygen analyzer detector is installed vertically downward, rainwater easily enters the shell and causes the zirconium core to burst, thus destroying the normal operation of the detector.

[0007] In order to solve the above technical problems, the utility model provides a breathing port, comprising:

[0008] A gas connector, having a through hole arranged along its axial direction, the gas connector comprising an air inlet end and a connecting end arranged oppositely;

[0009] The connecting end has a connecting structure for connecting to a housing in a zirconium oxide detector, and an explosion-proof structure is provided on a side of the through hole close to the connecting end;

[0010] A waterproof and breathable structure is installed on one side of the through hole close to the air inlet end, and the waterproof and breathable structure allows gas to pass through but prevents water from passing through.

[0011] In an embodiment of the present utility model, the waterproof breathable structure includes a waterproof breathable valve.

[0012] In an embodiment of the utility model, the waterproof breathable valve is a threaded waterproof breathable valve and has a connecting stud, and the connecting stud is threadedly connected to the end of the through hole and a sealing ring is arranged therebetween.

[0013] In one embodiment of the utility model, the explosion-proof structure includes a hole retaining ring clamped on the inner wall of the through hole.

[0014] In one embodiment of the present invention, the connection structure is constructed as a conical thread provided on the outer wall of the gas connector.

[0015] The utility model also provides a zirconium oxide detector, comprising the breathing port.

[0016] The above technical solution of the utility model has the following advantages compared with the prior art:

[0017] The breathing port and zirconium oxide detector described in the utility model can effectively prevent rainwater from passing through, ensure that the detector can work normally even in rainstorms, ensure the stable operation of the zirconium tube in a high temperature environment, and avoid damage to the zirconium core caused by temperature changes. The connection structure improves the convenience of maintenance and installation, reduces long-term maintenance and operating costs, and improves economic benefits.

[0018] The gas connector of the breathing port is provided with a through hole along its axial direction, including an air inlet end and a connecting end arranged opposite to each other, and has a connecting structure, which is a component connected to the shell of the zirconium oxide detector, can effectively prevent rainwater from entering, and maintain the free flow of gas.

[0019] The breathing port is provided with an explosion-proof structure, such as a hole retaining ring clamped on the inner wall of the through hole, which increases the safety of the equipment and effectively prevents safety hazards caused by sudden changes in internal gas pressure even when working in a humid or flammable gas environment.

[0020] The waterproof and breathable structure of the breathing port uses a breathable membrane material with waterproof properties, and uses the principle of the change in molecular size of water between gas and liquid to achieve the release of water vapor while preventing the penetration of liquid water, ensuring the dryness and safety of sensitive components inside the detector. In addition, the threaded waterproof and breathable valve simplifies the installation process and provides reliable leak-proof properties through the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0022] Figure 1 It is a structural schematic diagram of the breathing port of the utility model.

[0023] Figure 2 It is a schematic diagram of the structure of a zirconium oxide detector in one embodiment of the utility model.

[0024] Figure 3 It is a side view structural schematic diagram of a zirconium oxide detector in one embodiment of the utility model.

[0025] Figure 4 It is a schematic diagram of the internal structure of a zirconium oxide detector in one embodiment of the utility model.

[0026] Description of the Figures in the Specification:

[0027] 100, breathing port; 1, gas connector; 11, through hole;

[0028] 2. Connection structure;

[0029] 3. Explosion-proof structure;

[0030] 4. Waterproof and breathable structure; 41. Sealing ring;

[0031] 51. meter cover; 52. housing; 53. shield; 54. zirconia tube; 55. platinum electrode; 56. heater; 57. thermocouple; 110. cable gland; 120. calibration port. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0033] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0034] In the present utility model, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of the present utility model, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected or electrically connected or able to communicate with each other; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0036] Reference Figure 1 As shown, a breathing port in an embodiment of the utility model is used to be installed in a zirconium oxide detector, and the breathing port includes:

[0037] A gas connector 1 is provided with a through hole 11 along its axial direction, and the gas connector 1 includes an air inlet end and a connecting end which are arranged opposite to each other;

[0038] The connecting end has a connecting structure 2 for connecting to a housing 52 in a zirconium oxide detector, and an explosion-proof structure 3 is provided on one side of the through hole 11 close to the connecting end;

[0039] A waterproof and breathable structure 4 is installed on one side of the through hole 11 near the air inlet end, and the waterproof and breathable structure 4 allows gas to pass through but prevents water from passing through. This avoids the technical problem that when the existing zirconia oxygen analyzer detector is installed vertically downward, rainwater may enter the shell 52 in heavy rain weather and may cause the zirconium core to burst, thereby destroying the normal operation of the detector.

[0040] In some embodiments, the waterproof breathable structure 4 includes a waterproof breathable valve. A waterproof breathable membrane material is arranged inside the waterproof breathable valve. When water is in the state of water vapor, the water vapor molecules are very small, much smaller than the waterproof breathable membrane material, so that the water vapor molecules can be emitted. When the water vapor reaches the outside of the waterproof breathable membrane material, it will condense into large particles of water droplets. Due to the tension of the water droplets pulling each other, and the water droplets are much larger than the micropores of the waterproof breathable membrane material, the waterproof purpose is achieved under the dual effect.

[0041] In order to facilitate the installation of the waterproof breathable valve, the waterproof breathable valve is a threaded waterproof breathable valve and has a connecting stud, and the connecting stud is threadedly connected to the end of the through hole 11 and a sealing ring 41 is arranged therebetween.

[0042] In some embodiments, the explosion-proof structure 3 includes a hole retaining ring clamped on the inner wall of the through hole 11.

[0043] In order to facilitate the installation of the breathing port to the housing 52 of the zirconia detector, the connection structure 2 is constructed as a conical thread arranged on the outer wall of the gas connector 1.

[0044] In some embodiments, the structure of the zirconium oxide detector is as follows Figure 2 , Figure 3 As shown, the zirconia detector includes a cover 51, a housing 52 and a shield 53 connected in sequence, and a gland 110, a calibration port 120 and a breathing port 100 are installed on the housing 52; Figure 4As shown, at the innermost side of the middle of the shell 52 is a zirconia tube 54, which is equipped with a platinum electrode 55. The zirconia tube 54 is used to isolate the measured gas and the reference gas and generate a zirconium potential; the breathing port is connected to the reference side of the inner cavity of the zirconia tube 54, and a lotus-shaped heater 56 is wrapped outside, and a thermocouple 57 is set on the heater 56. The temperature of the detector zirconium tube is kept constant at 800°C by PID control of the heater 56. The outermost layer is a high-temperature resistant rock wool insulation tube to reduce heat exchange and maintain temperature stability. The zirconia detector can be directly unplugged after power failure without the zirconium tube being damaged by cold air. Based on the concentration potential phenomenon, the oxygen content is indirectly determined by inducing a potential difference on both sides of the zirconia solid electrolyte at high temperature by the platinum electrode 55. The design of the breathing port ensures that the pressure difference between the reference gas and the measured gas is equal to ensure accurate measurement. At the same time, the breathing port is equipped with a waterproof and breathable structure 4, which allows the gas to flow smoothly and prevents rainwater from entering, even when the detector is installed vertically downward.

[0045] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A breathing port, characterized in that: include: A gas connector (1) having a through hole (11) arranged along its axial direction, the gas connector (1) comprising an air inlet end and a connection end arranged opposite to each other; The connecting end has a connecting structure (2) for connecting to a housing (52) in a zirconium oxide detector, and an explosion-proof structure (3) is provided on a side of the through hole (11) close to the connecting end; A waterproof and breathable structure (4) is installed on one side of the through hole (11) close to the air inlet end, and the waterproof and breathable structure (4) allows gas to pass through but prevents water from passing through.

2. A breathing port according to claim 1, characterized in that: The waterproof and breathable structure (4) comprises a waterproof and breathable valve.

3. A breathing port according to claim 2, characterized in that: The waterproof breathable valve is a threaded waterproof breathable valve and has a connecting stud, the connecting stud is threadedly connected to the end of the through hole (11) and a sealing ring (41) is provided between the two.

4. A breathing port according to claim 1, characterized in that: The explosion-proof structure (3) comprises a hole retaining ring clamped on the inner wall of the through hole (11).

5. A breathing port according to claim 1, characterized in that: The connection structure (2) is constructed as a conical thread provided on the outer wall of the gas connector (1).

6. A zirconium oxide detector, characterized in that: Comprising the breathing port described in any one of claims 1-5.

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