Low cost fuel gas dew point meter
Patent Information
- Application Number
- CN202521660318.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-06
- Publication Date
- 2026-08-18
- Estimated Expiration
- 2035-08-06
AI Technical Summary
在以往的实践中，确定管道内气体的露点或霜点需要依赖色谱分析方法进行检测，这种方法要求燃气场站配备相应的色谱仪，但由于现场工程水的情况是零散分布的，难以实现全面覆盖，同时检测成本高昂
1、电容式温湿度传感器、数据处理单元和可视化显示单元的配合设置，与色谱仪相比，可以大大降低设备成本，还能够突破传统色谱仪的固定式检测局限，实现现场快速、精准测量；
Smart Images
Figure CN224651266U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gas dew point meters, and specifically to a low-cost gas dew point meter. Background Technology
[0002] Natural gas is one of the safest types of fuel. With increasing urban development and environmental protection needs in northern China, natural gas, as a clean and efficient energy source, plays an increasingly important role in urban heating, industrial production, and residential life. However, the low winter temperatures in northern regions pose challenges to urban gas supply systems, particularly the problem of ice blockage in pressure regulating equipment. Pressure regulating equipment is an indispensable part of the urban gas transmission and distribution system, responsible for adjusting gas pressure to suitable levels for residential and commercial use. In the cold winters of the north, when temperatures drop sharply, ice may form inside the pressure regulating equipment, a phenomenon known as "ice blockage." This typically occurs when gas containing moisture (such as construction water used in pipeline construction) passes through the pressure regulator. The temperature drop causes the moisture to condense and freeze, usually at the regulator valve or signal pipe, leading to pressure regulating equipment malfunctions, overpressure, and supply interruptions.
[0003] To address the issue of ice blockage in pressure regulating equipment, common solutions include using heat tracing equipment and increasing maintenance frequency. However, it is crucial to identify which areas of pressure regulating equipment are at risk of ice blockage due to excessive humidity. The temperature at which water vapor begins to condense into dew is called the dew point temperature, while the temperature at which water vapor in the air directly sublimates into frost is called the frost point temperature. The specific values for both depend on the humidity and pressure conditions of the medium. In past practice, determining the dew point or frost point of gas in pipelines required chromatographic analysis. This method requires gas stations to be equipped with appropriate chromatographs, but due to the scattered distribution of water in on-site engineering, comprehensive coverage is difficult, and the testing cost is high. Therefore, designing portable, low-cost equipment that can achieve accurate measurements is essential. Utility Model Content
[0004] In view of the above-mentioned defects or deficiencies in the existing technology, it is desirable to provide a low-cost gas dew point meter that can greatly reduce equipment costs compared with a chromatograph, and can also overcome the limitations of fixed detection of traditional chromatographs, enabling rapid and accurate on-site measurement.
[0005] According to the technical solution provided by the present utility model embodiment, a low-cost gas dew point meter includes a housing, a housing cover is detachably installed on the front side of the housing, a transparent viewing window for observation is embedded on the housing cover, a receiving cavity is provided inside the housing, the housing cover and the housing are both made of aluminum alloy, and a power button is fixedly installed on the top of the housing. A battery compartment, which is fixedly installed inside the outer casing and located within the receiving cavity; a capacitive temperature and humidity sensor, which is connected to the outer casing via wires; A data processing unit is detachably mounted on the rear side of the housing cover. The data processing unit is a PCB board, on which an MCU module is fixedly mounted. A visualization display unit is detachably mounted on the front side of the data processing unit. The transparent window is located on the front side of the visualization display unit, which is an OLED display screen. A handle is fixedly connected to the right side of the housing. A limiting member is disposed between the handle and the capacitive temperature and humidity sensor. The limiting member includes a connecting block fixedly disposed outside the capacitive temperature and humidity sensor, a fixing block fixedly connected to the handle, an externally threaded rod fixedly connected to the fixing block, and a threaded sleeve screwed to the externally threaded rod. The connecting block is fixedly fitted with a connector, and the threaded sleeve is fixedly fitted with a sliding sleeve. The connecting block is located below the handle. The bottom of the handle has a through hole for the capacitive temperature and humidity sensor to pass through. The sliding sleeve is slidably connected to the outside of the connector. The left end of the externally threaded rod is flush with the left end of the threaded sleeve.
[0006] In summary, the beneficial effects of this utility model are as follows: 1. The combination of capacitive temperature and humidity sensor, data processing unit and visualization display unit can greatly reduce equipment cost compared with chromatograph, and can also break through the fixed detection limitation of traditional chromatograph to achieve rapid and accurate on-site measurement. 2. The handle design makes this product easy to carry. Furthermore, the combination of the limiting components, connectors, and sliding sleeve during transport helps to limit the capacitive temperature and humidity sensor, preventing it from colliding with other objects and causing damage during transport. Attached Figure Description
[0007] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram of the connection between the outer shell, battery compartment, and power button of this utility model. Figure 3 This is a rear view structural diagram of the connection between the shell cover and the data processing unit of this utility model; Figure 4 This is a structural schematic diagram of the handle, limiting component, capacitive temperature and humidity sensor, connector, and sliding sleeve connection of this utility model; Figure 5 This is a circuit diagram of the data processing unit of this utility model.
[0008] The following are the labels in the diagram: 1. Outer shell; 2. Shell cover; 3. Transparent window; 4. Battery compartment; 5. Capacitive temperature and humidity sensor; 6. Data processing unit; 7. Visual display unit; 8. Handle; 9. Connecting block; 10. Fixing block; 11. External threaded rod; 12. Threaded sleeve; 13. Connecting joint; 14. Sliding sleeve; 15. Power button. Detailed Implementation
[0009] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.
[0010] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.
[0011] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A low-cost gas dew point meter includes a housing 1, a cover 2 detachably mounted on the front side of the housing 1, and a transparent viewing window 3 embedded in the cover 2; a battery compartment 4 fixedly mounted inside the housing 1; a capacitive temperature and humidity sensor 5 connected to the housing 1 via wires; a data processing unit 6 detachably mounted on the rear side of the cover 2; and a visualization display unit 7 detachably mounted on the front side of the data processing unit 6. 6. The detachable installation method of the cover 2 is screw installation; handle 8, the handle 8 is fixedly connected to the right side of the outer shell 1; limiting member, the limiting member is disposed between the handle 8 and the capacitive temperature and humidity sensor 5, the limiting member includes a connecting block 9 fixedly disposed outside the capacitive temperature and humidity sensor 5, a fixing block 10 fixedly connected to the handle 8, an external threaded rod 11 fixedly connected to the fixing block 10, and a threaded sleeve 12 screwed to the external threaded rod 11, wherein the connecting block 9 is fixedly installed with a connector 13, and the threaded sleeve 12 is fixedly installed with a sliding sleeve 14.
[0012] like Figure 1 and Figure 2 As shown, the housing 1 has an internal cavity, and the battery compartment 4 is located within the cavity. An internally threaded ring is fixedly connected to the rear side of the cover 2, facilitating the installation of the data processing unit 6. The transparent window 3 is located in front of the visualization display unit 7, facilitating the observation of the values displayed on the visualization display unit 7. The visualization display unit 7 is an OLED display screen, which has the advantage of low power consumption.
[0013] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, both the cover 2 and the outer shell 1 are made of aluminum alloy, which has the advantage of being lightweight and easier to carry. A power button 15 is fixedly installed on the top of the outer shell 1. The battery compartment 4, the capacitive temperature and humidity sensor 5, the data processing unit 6, the visualization display unit 7, and the power button 15 are electrically connected. The data processing unit 6 is a PCB board, on which an MCU module is fixedly installed. The MCU module communicates with the capacitive temperature and humidity sensor 5 through an I2C interface to calculate the dew point temperature in real time. The MCU module is an STM32L431, and the dew point calculation algorithm formula of the MCU module is: Td = (B × ln(RH / 100) + (A × T) / (B + T)) / (A - ln(RH / 100) - (A × T) / (B + T)), where A and B are empirical constants, T is the real-time temperature, and RH is the humidity.
[0014] like Figure 1 and Figure 4 As shown, the connecting block 9 is located below the handle 8. The bottom of the handle 8 has a through hole for the capacitive temperature and humidity sensor 5 to pass through, and the through hole matches the size of the capacitive temperature and humidity sensor 5. The sliding sleeve 14 is slidably connected to the outside of the connector 13. The sliding sleeve 14 can slide along the axial direction of the connector 13 to limit or release the capacitive temperature and humidity sensor 5. The left end of the external threaded rod 11 is flush with the left end of the threaded sleeve 12.
[0015] In use: The handle 8 makes this product easy to carry. During transport, the limiting component, connector 13, and sliding sleeve 14 work together to limit the capacitive temperature and humidity sensor 5, preventing it from colliding with other objects and being damaged due to shaking. Once the product is in the field, remove the cover 2, insert the battery into the battery compartment 4, and then replace the cover 2. Turn the screw sleeve 12 of the limiting component counterclockwise to move the sliding sleeve 14 to the right, separating it from the connector 13 and releasing the limitation on the capacitive temperature and humidity sensor 5. Then, use the quick connector to connect the pressure regulating equipment pipeline to the inlet pipe, and then connect the inlet pipe... Seal the connection tee and seal the other ports of the tee to the capacitive temperature and humidity sensor 5 and the outlet pipe. The gas is then discharged outside the facility or to the vent pipe connector through the outlet pipe. Then, turn on the power button 15. The capacitive temperature and humidity sensor 5 collects temperature and humidity data in real time and transmits the temperature and humidity data to the data processing unit 6. The algorithm calculates the dew point temperature (Td) and frost point temperature (Tf) of the gas in real time. The visualization display unit 7 displays the temperature, relative humidity, dew point temperature (Td), and frost point temperature (Tf) in real time. The coordinated setup of the capacitive temperature and humidity sensor 5, the data processing unit 6, and the visualization display unit 7 can greatly reduce equipment costs compared to a chromatograph. It can also overcome the limitations of the fixed detection of traditional chromatographs and achieve rapid and accurate on-site measurement.
[0016] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles and solutions employed. Furthermore, the scope of this invention is not limited to the specific combinations of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this utility model.
Claims
1. A low cost fuel gas dew point meter characterized by: Includes an outer shell (1), on the front side of which a cover (2) is detachably mounted, and a transparent viewing window (3) for observation is embedded in the cover (2). Battery compartment (4), which is fixedly installed inside the outer shell (1); A capacitive temperature and humidity sensor (5) is connected to the housing (1) via a wire. Data processing unit (6), which is detachably mounted on the rear side of the housing (2); A visualization display unit (7) is detachably installed on the front side of the data processing unit (6); A handle (8) is fixedly connected to the right side of the outer casing (1); The limiting component is disposed between the handle (8) and the capacitive temperature and humidity sensor (5). The limiting component includes a connecting block (9) fixedly disposed outside the capacitive temperature and humidity sensor (5), a fixing block (10) fixedly connected to the handle (8), an external threaded rod (11) fixedly connected to the fixing block (10), and a threaded sleeve (12) threaded to the external threaded rod (11). The connecting block (9) is fixedly installed with a connector (13), and the threaded sleeve (12) is fixedly installed with a sliding sleeve (14).
2. A low cost fuel gas dew point meter according to claim 1, characterized in that: The outer shell (1) has a receiving cavity inside, and the battery compartment (4) is located inside the receiving cavity.
3. A low cost fuel gas dew point meter according to claim 1, characterized in that: The transparent window (3) is located on the front side of the visualization display unit (7), which is an OLED display screen.
4. The low cost fuel gas dew point meter of claim 1 wherein: Both the cover (2) and the outer shell (1) are made of aluminum alloy, and a power button (15) is fixedly installed on the top of the outer shell (1).
5. A low cost fuel gas dew point meter according to claim 1, characterized in that: The data processing unit (6) is a PCB board, on which an MCU module is fixedly mounted.
6. A low cost fuel gas dew point meter according to claim 1, characterized in that: The connecting block (9) is located below the handle (8), and the bottom of the handle (8) is provided with a through hole for the capacitive temperature and humidity sensor (5) to pass through.
7. A low cost fuel gas dew point meter according to claim 1, characterized in that: The sliding sleeve (14) is slidably connected to the outside of the connector (13), and the left end of the external thread rod (11) is flush with the left end of the threaded sleeve (12).