Portable gas dew point meter

Abstract

The utility model discloses a portable gas dew point appearance, including detection mechanism, cleaning mechanism and shell mechanism, the detection mechanism includes the air inlet, filter screen, first valve body, flowmeter, sensor and exhaust port that link up in proper order, the cleaning mechanism includes gas storage tank, pump body and second valve body, the gas storage tank has stored the protective gas in, the gas storage tank, pump body, second valve body and flowmeter link up in proper order, the shell mechanism is set in detection mechanism and the outside of cleaning mechanism, the utility model's beneficial effect is: the cleaning mechanism can effectively remove the residual moisture in the pipeline, has avoided the interference of residual moisture to next detection, has guaranteed that sensor can be with the full, accurate contact of the gas to be detected every time detection, thereby has improved the reliability and precision of measurement result.

Description

Technical Field

[0001] This utility model relates to the field of dew point meters, specifically to a portable gas dew point meter. Background Technology

[0002] Gas dew point is a key indicator for measuring the moisture content in a gas, and its measurement accuracy directly affects industrial production safety and product quality.

[0003] Chinese utility model patent CN218956464U discloses a portable precision dew point meter, which includes a detection body and a shell. The detection body is equipped with a filter, a dew point sensor and an electronic flow meter. An air inlet, a flow control valve and an air outlet are fixedly connected to the upper side of the detection body. The air inlet, filter, flow control valve, electronic flow meter, dew point sensor and air outlet are connected in sequence. The shell is fitted on the outside of the detection body and a shoulder strap is connected to the shell.

[0004] The aforementioned technologies have the following drawbacks: after detecting the moisture content in the gas, some moisture may remain in the pipeline, affecting the accuracy of subsequent measurements. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a portable gas dew point meter to solve the technical problem that residual moisture affects the measurement accuracy in the prior art.

[0006] To achieve the above technical objectives, the present invention provides a portable gas dew point meter, including a detection mechanism, wherein the detection mechanism includes an air inlet, a filter, a first valve body, a flow meter, a sensor, and an exhaust port connected in sequence. A cleaning mechanism, comprising a gas storage tank, a pump body, and a second valve body, wherein the gas storage tank stores protective gas, and the gas storage tank, pump body, second valve body, and flow meter are sequentially connected; and, The outer casing is fitted onto the outside of the detection mechanism and the cleaning mechanism.

[0007] In some embodiments, the pump body is a diaphragm pump.

[0008] In some embodiments, the second valve body is a flow valve.

[0009] In some embodiments, the cleaning mechanism further includes a cooling element, a guide pipe, and a valve. The cooling element is disposed inside the gas storage tank, the inlet of the guide pipe is located directly below the cooling element, the outlet of the guide pipe extends to the outside of the gas storage tank, and the valve is installed on the guide pipe.

[0010] In some embodiments, the cleaning mechanism further includes a backwash pipe, the second valve body is a three-way valve, the inlet of the backwash pipe is connected to one of the outlets of the second valve body, the outlet of the backwash pipe is connected to the outlet of the filter screen, and the inlet of the flow meter is connected to the other outlet of the second valve body.

[0011] In some embodiments, the cleaning mechanism further includes a brush connected to a drive assembly, the brush being rotatably connected to a filter screen and abutting against the inlet of the filter screen, the fixed end of the drive assembly being connected to the filter screen, and the movable end of the drive assembly being connected to the brush.

[0012] In some embodiments, the drive assembly includes an impeller that is coaxially fixedly connected to the brush.

[0013] In some embodiments, the housing mechanism includes a housing, a cover, a buckle, and a handle. The cover is rotatably connected to the housing, the buckle is fixedly connected to the housing, the buckle is detachably connected to the cover, and the handle is connected to the cover.

[0014] Compared with the prior art, the beneficial effects of this utility model include: the cleaning mechanism can effectively remove residual moisture in the pipeline, avoid the interference of residual moisture on the next test, and ensure that the sensor can fully and accurately contact the gas to be tested during each test, thereby improving the reliability and accuracy of the measurement results. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the outer shell mechanism provided by this utility model; Figure 2 This is a schematic diagram of the overall structure of the detection mechanism and cleaning mechanism provided by this utility model; Figure 3 This utility model provides Figure 2 Enlarged view of the local structure at point A in the middle.

[0016] Explanation of reference numerals in the attached figures: 1. Testing mechanism; 11. Air inlet; 12. Filter screen; 13. First valve body; 14. Flow meter; 15. Sensor; 16. Exhaust port; 2. Cleaning mechanism; 21. Air storage tank; 22. Pump body; 23. Second valve body; 24. Cooling element; 25. Backwash pipe; 26. Brush; 27. Impeller; 28. Guide pipe; 29. ​​Valve; 3. Outer shell mechanism; 31. Housing; 32. Cover; 33. Buckle; 34. Handle. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0018] This invention provides a portable gas dew point meter, the structure of which is as follows: Figure 1 - Figure 3 As shown, it includes a testing mechanism 1, a cleaning mechanism 2, and a housing mechanism 3.

[0019] The detection mechanism 1 includes an air inlet 11, a filter screen 12, a first valve body 13, a flow meter 14, a sensor 15, and an exhaust port 16 connected in sequence.

[0020] The cleaning mechanism 2 includes an air storage tank 21, a pump body 22, and a second valve body 23. The air storage tank 21 stores protective gas. The air storage tank 21, the pump body 22, the second valve body 23, and the flow meter 14 are connected in sequence.

[0021] The outer shell mechanism 3 is sleeved on the outside of the detection mechanism 1 and the cleaning mechanism 2.

[0022] During operation, when performing gas dew point detection, the gas to be tested enters through inlet 11, passes through filter screen 12 to remove impurities, then enters flow meter 14 through first valve body 13, subsequently flows through sensor 15 to complete dew point detection, and finally exits through exhaust port 16. After one test is completed, to prevent residual moisture in the pipeline from affecting the accuracy of the next measurement, cleaning mechanism 2 is activated. Protective gas stored in gas tank 21, such as dry nitrogen, is pumped by pump body 22, passing through second valve body 23 and flow meter 14 into the pipeline of detection mechanism 1. Due to the dry and clean characteristics of the protective gas, as it flows in the pipeline, it carries away any residual moisture in the pipeline, which is then discharged from exhaust port 16, thus cleaning the residual moisture in the pipeline.

[0023] In this invention, the cleaning mechanism 2 can effectively remove residual moisture in the pipeline, avoiding interference from residual moisture to the next test, and ensuring that the sensor 15 can fully and accurately contact the gas to be tested during each test, thereby improving the reliability and accuracy of the measurement results.

[0024] To prevent secondary pollution, please refer to Figure 2 In a preferred embodiment, the pump body 22 is a diaphragm pump.

[0025] During use, the diaphragm pump delivers gas through the reciprocating motion of the diaphragm. The fluid chamber inside the pump body 22 is completely isolated from the drive mechanism, which can prevent contaminants such as lubricating oil and metal shavings from mixing into the protective gas, ensuring that the protective gas entering the detection pipeline is always clean and dry, and preventing secondary contamination of the pipeline or sensor 15.

[0026] To prevent gas backflow and improve the cleanliness of gas storage tank 21, please refer to... Figure 2 In a preferred embodiment, the second valve body 23 is a flow valve.

[0027] When in use, it can adapt to the purging requirements of different detection scenarios. After detecting high humidity gas, a large flow of dry protective gas is required to purge the pipeline to prevent moisture residue from affecting the next detection. After detecting clean gas, only a small flow of protective gas is needed to purge the pipeline.

[0028] To improve the dryness of the protective gas, please refer to... Figure 2 In a preferred embodiment, the cleaning mechanism 2 further includes a cooling plate 24, a guide pipe 28, and a valve 29. The cooling plate 24 is disposed inside the gas storage tank 21. The inlet of the guide pipe 28 is located directly below the cooling plate 24, and the outlet of the guide pipe 28 extends to the outside of the gas storage tank 21. The valve 29 is installed on the guide pipe 28.

[0029] In use, the cooling element 24 is installed inside the air receiver 21, and its function is to reduce the temperature inside the air receiver 21 through cooling. When the cooling element 24 is working, it causes water vapor in the air inside the air receiver 21 to condense into liquid water droplets, thereby dehumidifying and drying the air inside the air receiver 21. The condensed liquid water will collect under the cooling element 24 due to gravity, and the inlet of the guide pipe 28 is located at this point, which can collect the condensed water and guide it to the outside of the air receiver 21 through the guide pipe 28. The valve 29 is installed on the guide pipe 28 to control the opening and closing of the guide pipe 28: when it is necessary to drain the condensate, the valve 29 is opened to allow the water to flow out along the guide pipe 28; when it is not necessary to drain, the valve 29 is closed to ensure the airtightness of the air receiver 21 and prevent external air from entering and affecting the internal environment.

[0030] To clean filter 12, please refer to... Figure 2 In a preferred embodiment, the cleaning mechanism 2 further includes a backwash pipe 25, the second valve body 23 is a three-way valve, the inlet of the backwash pipe 25 is connected to one of the outlets of the second valve body 23, the outlet of the backwash pipe 25 is connected to the outlet of the filter screen 12, and the inlet of the flow meter 14 is connected to the other outlet of the second valve body 23.

[0031] During use, filter 12 filters impurities from the gas being tested. Over time, impurities accumulate on filter 12, and some moisture may also remain. Backwash pipe 25 directs protective gas from the outlet of the second valve body 23 to the outlet of filter 12, allowing the protective gas to flow backward through filter 12. Under the action of the reverse airflow, impurities adhering to filter 12 are washed away, and residual moisture is carried away, preventing filter 12 from becoming a new source of contamination and ensuring its filtering effect. This, in turn, ensures the purity of the gas entering sensor 15 during subsequent testing.

[0032] To further clean filter 12, please refer to... Figure 3 In a preferred embodiment, the cleaning mechanism 2 further includes a brush 26 on a drive assembly. The brush 26 is rotatably connected to the filter screen 12 and abuts against the inlet of the filter screen 12. The fixed end of the drive assembly is connected to the filter screen 12, and the movable end of the drive assembly is connected to the brush 26.

[0033] During use, some impurities in the gas being tested may adhere tightly to the inlet surface of the filter screen 12 during the testing process, which cannot be completely removed by the airflow from the backwash pipe 25 alone. The brush 26, driven by the drive assembly, rotates, its bristles directly contacting the inlet of the filter screen 12. Through mechanical friction, it peels away the firmly attached impurities from the filter screen 12. Since the air pressure at the outlet side of the filter screen 12 is greater than that at the inlet side, this further accelerates the removal of impurities. This physical cleaning method complements the airflow cleaning of the backwash, significantly improving the cleanliness of the filter screen 12 and preventing residual impurities from affecting the filtration effect of subsequent gases.

[0034] To drive brush 26 to rotate, please refer to... Figure 3 In a preferred embodiment, the drive assembly includes an impeller 27, which is coaxially fixedly connected to the brush 26.

[0035] In use, when the cleaning mechanism 2 is activated, protective gas flows through the backwash pipe 25 or the detection pipe. The airflow impacts the impeller 27, causing it to rotate, which in turn drives the coaxial brush 26 to rotate synchronously. This design cleverly utilizes the gas flow that already exists during the cleaning process as power, eliminating the need for additional motors, batteries, or other drive devices. This not only simplifies the equipment structure and reduces the overall weight but also lowers energy consumption and extends the battery life of the portable dew point meter, better aligning with its portable and energy-saving design philosophy.

[0036] To protect cleaning mechanism 2 and testing mechanism 1, please refer to... Figure 1In a preferred embodiment, the outer casing mechanism 3 includes a housing 31, a cover 32, a buckle 33, and a handle 34. The cover 32 is rotatably connected to the housing 31, the handle 34 is connected to the cover 32, and the buckle 33 is fixedly connected to the housing 31. The buckle 33 and the cover 32 are detachably connected. The buckle 33 includes a fixed base, an elastic hook, and a locking groove. The fixed base is fixedly connected to the housing 31, the root of the elastic hook is hinged to the fixed base, the end of the elastic hook extends out of the fixed base, and the end of the elastic hook is bent inward to form a hook head. The locking groove is provided on the cover 32 and is adapted to the elastic hook.

[0037] During use, the housing 31, as the main structure, completely encloses core components such as the detection mechanism 1 and the cleaning mechanism 2, effectively isolating them from external contaminants such as dust, moisture, and oil, preventing them from entering the equipment and affecting the performance of precision components such as the sensor 15 and the valve body. The buckle 33 is fixedly connected to the housing 31 and detachably connected to the cover 32. When fastened, the hook of the elastic hook engages in the locking groove, and the elastic rebound force of the cantilever ensures a tight fit between the cover 32 and the housing 31, ensuring a seamless closure. When unlocking, pressing the operating part causes the elastic hook to open outward, disengaging the hook from the locking groove, allowing the cover 32 to flip open around its rotation axis. When the cover 32 is closed, it is firmly locked to the housing 31, preventing accidental opening of the cover 32 during equipment handling or vibration, which could expose or damage internal components. The handle 34 is attached to the cover 32, providing a comfortable grip for the equipment, facilitating one-handed carrying and significantly reducing physical exertion during movement.

[0038] To better understand this utility model, the following is combined with... Figure 1 - Figure 3 The working principle of a portable gas dew point meter according to this utility model is described in detail below: During gas dew point detection, the gas to be tested enters through the inlet 11, is filtered by the filter screen 12 to remove impurities, passes through the first valve body 13 into the flow meter 14, then flows through the sensor 15 to complete the dew point detection, and finally exits from the exhaust port 16. After one test is completed, to avoid residual moisture in the pipeline affecting the accuracy of the next measurement, the cleaning mechanism 2 is activated. The protective gas stored in the gas storage tank 21, such as dry nitrogen, is pumped by the pump body 22, passing sequentially through the second valve body 23 and the flow meter 14 into the pipeline of the detection mechanism 1. Because the protective gas has dry and clean characteristics, as it flows in the pipeline, it carries away any residual moisture in the pipeline, which is then finally discharged from the exhaust port 16, thus cleaning the residual moisture in the pipeline.

[0039] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A portable gas dew point meter, characterized in that, include: The testing mechanism includes an air inlet, a filter, a first valve body, a flow meter, a sensor, and an exhaust port that are connected in sequence. A cleaning mechanism, comprising a gas storage tank, a pump body, and a second valve body, wherein the gas storage tank stores protective gas, and the gas storage tank, pump body, second valve body, and flow meter are sequentially connected; and, The outer casing is fitted onto the outside of the detection mechanism and the cleaning mechanism.

2. A portable gas dew point meter according to claim 1, characterized in that, The pump body is a diaphragm pump.

3. A portable gas dew point meter according to claim 1, characterized in that, The second valve body is a flow valve.

4. A portable gas dew point meter according to claim 1, characterized in that, The cleaning mechanism also includes a cooling plate, a guide pipe, and a valve. The cooling plate is located inside the gas storage tank. The inlet of the guide pipe is located directly below the cooling plate. The outlet of the guide pipe extends to the outside of the gas storage tank. The valve is installed on the guide pipe.

5. A portable gas dew point meter according to claim 1, characterized in that, The cleaning mechanism also includes a backwash pipe, the second valve body is a three-way valve, the inlet of the backwash pipe is connected to one of the outlets of the second valve body, the outlet of the backwash pipe is connected to the outlet of the filter screen, and the inlet of the flow meter is connected to the other outlet of the second valve body.

6. A portable gas dew point meter according to claim 1, characterized in that, The cleaning mechanism also includes a brush and a drive assembly. The brush is rotatably connected to the filter screen and abuts against the inlet of the filter screen. The fixed end of the drive assembly is connected to the filter screen, and the movable end of the drive assembly is connected to the brush.

7. A portable gas dew point meter according to claim 6, characterized in that, The drive assembly includes an impeller, which is coaxially and fixedly connected to the brush.

8. A portable gas dew point meter according to claim 1, characterized in that, The outer casing mechanism includes a housing, a cover, a buckle, and a handle. The cover is rotatably connected to the housing, the buckle is fixedly connected to the housing, the buckle is detachably connected to the cover, and the handle is connected to the cover.

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