A gas detection probe for septic tanks with corrosion resistance

Abstract

This utility model relates to a gas detection probe, specifically a septic tank gas detection probe with anti-corrosion function. It includes a detector and a probe fixedly installed at the bottom of the detector. An air inlet is provided at the bottom of the probe, and a cavity communicating with the air inlet is provided inside the probe. A miniature air pump is fixedly installed on the inner wall of the probe above the air inlet. A sensor for detecting the gas concentration in the septic tank is fixedly installed on the upper inner wall of the cavity. A rotating component is symmetrically rotatably installed on the lower outer wall of the probe. Rotating the rotating component opens and closes the air inlet. When the probe is not in use, a baffle completely blocks the air inlet, preventing external pollutants from entering the probe. The outer wall of the probe is coated with a protective coating, including an anti-rust primer, a chemical corrosion-resistant coating, and an anti-ultraviolet protective film. These three components work together to enhance the probe's corrosion resistance, extend its service life, and ensure stable operation of the detection work.

Description

Technical Field

[0001] This utility model relates to a gas detection probe, and more particularly to a septic tank gas detection probe with anti-corrosion function. Background Technology

[0002] Septic tanks are an important component of urban drainage systems. Their internal environment is complex, containing various harmful and flammable gases such as methane, hydrogen sulfide, and carbon monoxide. These gases are not only harmful to human health but can also cause explosions and other safety accidents. By installing corrosion-resistant gas detection probes in septic tanks, the gas conditions inside can be monitored in real time. Any abnormalities detected will trigger an immediate alarm, alerting management personnel to take timely action and prevent accidents.

[0003] Chinese patent CN104596973B, entitled "Gas Sensor and Method for Detecting Methane Gas Concentration in Septic Tank Using the Same," describes a sensor with a structure that has the advantages of strong explosion-proof performance and, in particular, the ability to reduce the T90, thereby increasing the response speed. The invention also discloses a method for detecting methane gas concentration in septic tanks using this gas sensor, which has an even better response speed.

[0004] Gas detection probes for septic tanks are prone to problems such as shell corrosion, decreased detection accuracy, and shortened equipment lifespan under harsh conditions such as corrosive gases and high humidity inside septic tanks. Utility Model Content

[0005] The main purpose of this invention is to provide a gas detection probe for septic tanks with anti-corrosion function, so as to solve the problems raised in related technologies.

[0006] To achieve the above objectives, according to one aspect of this utility model, a septic tank gas detection probe with anti-corrosion function is provided, including a detector and a probe fixedly installed at the bottom of the detector. The bottom of the probe has an air inlet, and a cavity communicating with the air inlet is opened inside the probe. A miniature air pump is fixedly installed on the inner wall of the probe above the air inlet. A sensor for detecting the gas concentration in the septic tank is fixedly installed on the inner wall of the upper end of the cavity. A rotating component is symmetrically rotated on the outer wall of the lower end of the probe. The air inlet is opened and closed by rotating the rotating component. The outer wall of the probe is coated with a protective coating.

[0007] Furthermore, a moisture-absorbing layer is fixedly provided on the inner wall of the cavity, and the moisture-absorbing layer is annular. A drain outlet is symmetrically provided through the side wall of the probe, and the drain outlet is connected to the cavity.

[0008] Furthermore, the sensor includes at least an electrochemical sensor and an infrared gas sensor, and the probe has symmetrically arranged gas outlets communicating with the cavity at the upper end of the cavity.

[0009] Furthermore, the rotating component includes a semi-circular baffle, a connecting rod fixedly connected to the top of the baffle, a connecting shaft fixedly connected to one end of the connecting rod, and an elastic protrusion fixedly connected to the outer wall of the connecting shaft.

[0010] Furthermore, a U-shaped fixing block is symmetrically fixed to the lower outer wall of the probe, one end of the connecting rod is rotatably disposed in the opening of the fixing block, the connecting shaft is rotatably disposed in the fixing block, and two slots are opened in the fixing block, with the elastic protrusion engaging in the slots.

[0011] Furthermore, the protective coating includes an anti-rust primer coated on the outer wall of the probe, an anti-rust primer coated with a chemical corrosion resistant coating, and a chemical corrosion resistant coating coated with a protective film.

[0012] Furthermore, the surfaces of the miniature air pump and the sensor are coated with a chemical corrosion resistant coating.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This septic tank gas detection probe with anti-corrosion function is equipped with a rotating component. When the probe is not in use, the baffle completely blocks the air inlet to prevent external pollutants from entering the probe. When detection is required, the rotating component is rotated to remove the baffle from blocking the air inlet. A certain force needs to be applied to release the elastic protrusion, ensuring stability under normal working conditions. This structure is simple and reliable, effectively protecting the probe from external pollutants when not in use, while also allowing for quick opening of the air inlet for detection when needed.

[0015] 2. This septic tank gas detection probe with anti-corrosion function is equipped with a protective coating, including an anti-rust primer, a chemical corrosion resistant coating, and an anti-ultraviolet protective film. The anti-rust primer can form a protective layer on the probe surface, and zinc preferentially corrodes and protects the substrate to prevent rusting; the chemical corrosion resistant coating can block corrosive gases and liquids in the septic tank and prevent the outer shell from being corroded; the anti-ultraviolet protective film can resist ultraviolet rays and prevent the coating from aging; the three work together to improve the probe's anti-corrosion ability, extend its service life, and ensure the stable operation of detection work. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the gas detection probe in a preferred embodiment of the present invention;

[0017] Figure 2 This is a cross-sectional view of the probe in a preferred embodiment of the present invention;

[0018] Figure 3 This is a preferred embodiment of the present invention. Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0019] Figure 4 This is a partial cross-sectional view of the probe structure in a preferred embodiment of the present invention;

[0020] Figure 5 This is a preferred embodiment of the present invention. Figure 4 Enlarged schematic diagram of the structure at point B.

[0021] Figure label:

[0022] 1. Detector; 2. Probe; 21. Air inlet; 22. Cavity; 23. Miniature air pump; 24. Moisture-absorbing layer; 25. Protective coating; 251. Anti-rust primer; 252. Chemical corrosion resistant coating; 253. Protective film; 26. Drain outlet; 27. Air outlet; 28. Fixing block; 281. Slot;

[0023] 5. Rotating component; 51. Baffle; 52. Connecting rod; 521. Connecting shaft; 522. Elastic protrusion;

[0024] 6. Sensors; 61. Electrochemical sensors; 62. Infrared gas sensors. Detailed Implementation

[0025] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0026] This embodiment provides a septic tank gas detection probe with anti-corrosion function, including a detector 1 and a probe 2 fixedly installed at the bottom of the detector 1. The probe 2 has an air inlet 21 at the bottom and a cavity 22 communicating with the air inlet 21 inside the probe 2. A miniature air pump 23 is fixedly installed on the inner wall of the probe 2 above the air inlet 21. A sensor 6 for detecting the gas concentration in the septic tank is fixedly installed on the inner wall of the upper end of the cavity 22. A rotating component 5 is symmetrically rotated on the outer wall of the lower end of the probe 2. The air inlet 21 is opened and closed by rotating the rotating component 5. The outer wall of the probe 2 is coated with a protective coating 25.

[0027] like Figure 1 As shown, detector 1 is used for signal processing and display, and probe 2 is used for gas sampling and detection.

[0028] like Figure 2As shown, the diameter of the air inlet 21 gradually decreases from bottom to top. This design can increase the effective sampling area of ​​the gas entering the probe 2, which is beneficial for capturing more gas samples, especially when the gas concentration is low or the flow rate is slow. The larger inlet also reduces the resistance when the gas enters, making it easier for the gas to enter the probe 2, which helps to improve the working efficiency of the micro air pump 23.

[0029] like Figure 2 and Figure 3 As shown, a moisture-absorbing layer 24 is fixedly installed on the inner wall of the cavity 22, and the moisture-absorbing layer 24 is annular. A drain outlet 26 is symmetrically opened through the side wall of the probe 2. The drain outlet 26 is connected to the cavity 22 and is inclined from the end near the cavity 22 to the lower outer end of the probe 2. The moisture-absorbing layer 24 contains a desiccant, such as silica gel desiccant or molecular sieve desiccant. The moisture-absorbing layer 24 is used to absorb the moisture of the gas entering the cavity 22. When the moisture-absorbing layer 24 continues to absorb the moisture in the gas, it will gradually reach a saturated state. As the moisture absorption process proceeds, the surface temperature of the moisture-absorbing layer 24 will change, creating a temperature difference with the surrounding environment, which will cause the absorbed moisture to condense into condensate. Under the action of gravity, the condensate is discharged from the probe 2 through the drain outlet 26, effectively preventing water accumulation and corrosion.

[0030] like Figure 2 As shown, sensor 6 includes at least an electrochemical sensor 61 and an infrared gas sensor 62. Electrochemical sensor 61 is mainly used to detect the concentration of toxic gases, such as carbon monoxide and hydrogen sulfide, while infrared gas sensor 62 is mainly used to detect the concentration of hydrocarbons such as carbon dioxide and methane. Sensor 6 converts the detected gas concentration information into analog electrical signals, such as voltage signals or current signals. These analog signals are directly transmitted to the signal processing circuit in detector 1 through wires.

[0031] like Figure 2 As shown, the probe 2 has symmetrically arranged air outlets 27 at the upper end of the cavity 22, which are connected to the cavity 22. When the micro air pump 23 draws the gas in the septic tank into the cavity 22, the gas is fully in contact with the sensor 6 in the cavity 22 for detection. As the detection process proceeds, the gas temperature may rise slightly due to the operation of the sensor 6 or environmental factors. Since the density of hot air is less than that of cold air, according to the principle of buoyancy, the hot air will rise naturally, so that the rising hot air is discharged from the cavity 22 through the air outlet 27. At the same time, it is ensured that the gas can contact the surface of the sensor 6 evenly.

[0032] like Figure 4 and Figure 5As shown, the rotating component 5 includes a semi-circular baffle 51. A connecting rod 52 is fixedly connected to the top of the baffle 51. A connecting shaft 521 is fixedly connected to one end of the connecting rod 52. An elastic protrusion 522 is fixedly connected to the outer wall of the connecting shaft 521. The elastic protrusion 522 is made of elastic materials such as rubber and silicone.

[0033] like Figure 1 , Figure 4 and Figure 5 As shown, a U-shaped fixing block 28 is symmetrically fixed to the lower outer wall of the probe 2. One end of the connecting rod 52 is rotatably disposed within the opening of the fixing block 28, and the connecting shaft 521 is rotatably disposed within the fixing block 28. Two slots 281 are formed within the fixing block 28, and the elastic protrusion 522 is engaged within the slots 281. The slots 281 cooperate with the elastic protrusion 522 to fix the rotating component 5 in different positions. When the elastic protrusion 522 is engaged within the slot 281, the rotating component 5 is fixed at the corresponding angle and will not rotate arbitrarily.

[0034] like Figure 4 and Figure 5 As shown, when probe 2 is not in use, the two baffles 51 are tightly fitted together on one side and set perpendicular to probe 2. At the same time, the elastic protrusion 522 on the connecting shaft 521 is engaged in one of the slots 281, so that the baffle 51 can be stably held in this position. At this time, the baffle 51 completely blocks the air inlet 21, preventing external dust, impurities, water vapor and other pollutants from entering the probe 2. When a septic tank gas test is required, the rotating component 5 is rotated to rotate the connecting shaft 521, and the elastic protrusion 522 is displaced from the slot 281. When the elastic protrusion 522 rotates to align with the other slot 281, it will return to its original shape under its own elasticity and lock into the slot 281. At this time, the baffle 51 no longer blocks the air inlet 21, and the gas in the septic tank can smoothly enter the probe 2 through the air inlet 21 for the sensor 6 to detect. The rotating part 5 needs to apply a certain force to release the elastic protrusion 522 from the slot 281 to ensure its stability under normal working conditions.

[0035] like Figure 2 and Figure 3As shown, the protective coating 25 includes an anti-rust primer 251 coated on the outer wall of the probe 2, which is an epoxy zinc-rich primer that can form a dense zinc-iron alloy layer on the stainless steel surface. When corrosive media penetrate, zinc is preferentially corroded as the anode, thereby protecting the stainless steel substrate. The anti-rust primer 251 is coated with a chemical corrosion resistant coating 252, which can effectively block the corrosion of the probe 2 housing by various corrosive gases and liquids volatilized from the septic tank. The chemical corrosion resistant coating 252 is coated with a protective film 253, which is a polyurethane-acrylate copolymer UV-resistant transparent coating that can effectively resist ultraviolet radiation and prevent coating aging, discoloration and chalking. The surfaces of the micro air pump 23 and the sensor 6 are also coated with the chemical corrosion resistant coating 252.

[0036] In practical use, when the probe 2 is not in use, the rotating component 5 is rotated until the two baffles 51 are tightly fitted together and perpendicular to the probe 2. At this time, the elastic protrusion 522 on the connecting shaft 521 is engaged in one of the slots 281, and the baffle 51 completely blocks the air inlet 21, preventing external pollutants from entering the probe 2. When septic tank gas detection is required, the rotating component 5 is rotated to rotate the connecting shaft 521, releasing the elastic protrusion 522 from the engaged slot 281. Rotation continues until the elastic protrusion 522 is aligned with the other slot 281, and the elastic protrusion 522 is engaged in that slot 281. Inside 1, the baffle 51 no longer blocks the air inlet 21, allowing the gas in the septic tank to smoothly enter the probe 2. The micro air pump 23 is activated, and the gas enters the cavity 22 from the air inlet 21, making full contact with the sensor 6. The electrochemical sensor 61 detects the concentration of toxic gas, and the infrared gas sensor 62 detects the concentration of hydrocarbons. As the detection process proceeds, the gas temperature may rise, and the hot air rises and is discharged from the cavity 22 through the air outlet 27. The moisture-absorbing layer 24 on the inner wall of the cavity 22 absorbs moisture from the gas. When it reaches saturation, the absorbed moisture condenses into condensate and is discharged from the probe 2 through the drain outlet 26 under the action of gravity.

[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A gas detection probe for septic tanks with anti-corrosion function, comprising a detector (1) and a probe (2) fixedly disposed at the bottom of the detector (1), wherein the bottom of the probe (2) is provided with an air inlet (21), and a cavity (22) communicating with the air inlet (21) is provided inside the probe (2), characterized in that, A micro air pump (23) is fixedly installed on the inner wall of the probe (2) at the upper end of the air inlet (21). A sensor (6) for detecting the gas concentration in the septic tank is fixedly installed on the inner wall of the upper end of the cavity (22). A rotating component (5) is symmetrically rotated on the outer wall of the lower end of the probe (2). The air inlet (21) is opened and closed by rotating the rotating component (5). The outer wall of the probe (2) is coated with a protective coating (25).

2. The septic tank gas detection probe with anti-corrosion function according to claim 1, characterized in that, The inner wall of the cavity (22) is fixedly provided with a moisture-absorbing layer (24), and the moisture-absorbing layer (24) is annular. The side wall of the probe (2) is symmetrically provided with a drain outlet (26), and the drain outlet (26) is connected to the cavity (22).

3. The septic tank gas detection probe with anti-corrosion function according to claim 1, characterized in that, The sensor (6) includes at least an electrochemical sensor (61) and an infrared gas sensor (62), and the probe (2) has symmetrically opened gas outlets (27) communicating with the cavity (22) at the upper end of the cavity (22).

4. The septic tank gas detection probe with anti-corrosion function according to claim 1, characterized in that, The rotating component (5) includes a semi-circular baffle (51), a connecting rod (52) is fixedly connected to the top of the baffle (51), a connecting shaft (521) is fixedly connected to one end of the connecting rod (52), and an elastic protrusion (522) is fixedly connected to the outer wall of the connecting shaft (521).

5. The septic tank gas detection probe with anti-corrosion function according to claim 4, characterized in that, The probe (2) has a U-shaped fixing block (28) symmetrically fixed to its lower outer wall. One end of the connecting rod (52) is rotatably set in the opening of the fixing block (28). The connecting shaft (521) is rotatably set in the fixing block (28). Two slots (281) are opened in the fixing block (28). The elastic protrusion (522) is snapped into the slot (281).

6. The septic tank gas detection probe with anti-corrosion function according to claim 1, characterized in that, The protective coating (25) includes an anti-rust primer (251) coated on the outer wall of the probe (2), the anti-rust primer (251) is coated with a chemical corrosion resistant coating (252) on the outside, and a protective film (253) is coated on the outside of the chemical corrosion resistant coating (252).

7. The septic tank gas detection probe with anti-corrosion function according to claim 6, characterized in that, The surfaces of the micro air pump (23) and the sensor (6) are both coated with a chemical corrosion resistant coating (252).

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