A portable gas mass flow meter

Abstract

This utility model discloses a portable gas mass flow meter, including a handheld gas mass flow meter body for detecting gas mass flow rate. The top of the handheld gas mass flow meter body is provided with an air inlet mechanism for receiving and discharging gas into the body. The air inlet mechanism is equipped with a dehumidification component for removing moisture from the gas. The dehumidification component includes a transparent box for filling with blue silica gel desiccant particles and an electric heating element for heating the blue silica gel desiccant particles. This utility model effectively avoids interference from moisture in the gas on the sensors (such as thermal sensors, differential pressure sensors, etc.) inside the handheld gas mass flow meter body, reduces problems such as changes in thermal conductivity and sensor corrosion caused by moisture, and significantly improves the accuracy and stability of gas mass flow rate measurement.

Description

Technical Field

[0001] This utility model relates to the field of gas mass flow meter technology, specifically a portable gas mass flow meter. Background Technology

[0002] Gas mass flow meters, as instruments used to accurately measure the mass flow rate of gases, are widely used in industrial production, environmental protection, scientific research experiments, medical equipment and other fields. Among them, handheld gas mass flow meters are widely used in scenarios such as rapid on-site detection, temporary pipeline monitoring and outdoor environmental monitoring due to their small size and portability. They can meet users' needs for real-time acquisition of gas flow parameters under different locations and operating conditions, and provide key data support for production control, safety early warning and environmental assessment.

[0003] A search revealed that patent publication number CN212110161U discloses a handheld thermal gas mass flow meter, including a flow meter housing. A display screen is fixedly connected to the upper front of the flow meter housing, and a detection interface is fixedly connected to the middle of the upper rear of the flow meter housing. A battery cover is fixedly fitted to the lower rear of the flow meter housing. Protrusions are integrally fixedly connected to the center of each of the four sides of the outer wall of the flow meter housing. This invention uses a pin to open the left and right protective sleeves, then mates the protrusions on the outside of the flow meter housing with the limiting grooves on the inner sides of the left and right protective sleeves. A long bolt is then rotated to clamp and fix the upper parts of the left and right protective sleeves through threaded holes, making later removal very convenient. Since the width of the left and right protective sleeves is greater than the width of the flow meter housing, it provides better protection for the flow meter housing. When carrying the flow meter, the operator can use a lanyard to carry it.

[0004] When existing portable gas mass flow meters are used to detect gases, the gases being measured often contain a certain amount of moisture. The presence of moisture directly affects the measurement accuracy of the sensors inside the flow meter. For example, the core sensor of a thermal gas mass flow meter calculates flow rate through gas heat exchange. Moisture will change the heat conduction characteristics of the gas, leading to measurement deviation. At the same time, condensed moisture may adhere to the sensor surface and even cause corrosion of components, shortening the service life of the instrument. Therefore, a portable gas mass flow meter is designed. Utility Model Content

[0005] In view of the defects or shortcomings of portable gas mass flow meters, the purpose of this utility model is to provide a portable gas mass flow meter that effectively avoids the interference caused by moisture in the gas to the internal sensors (such as thermal sensors, differential pressure sensors, etc.) of the handheld gas mass flow meter.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a portable gas mass flow meter, including a handheld gas mass flow meter body for detecting gas mass flow rate, and an air intake mechanism for receiving gas and discharging gas into the handheld gas mass flow meter body is provided on the top of the handheld gas mass flow meter body.

[0008] The air intake mechanism is equipped with a dehumidification component for removing moisture from the gas.

[0009] The dehumidification assembly is equipped with a transparent box for filling with blue silica gel desiccant particles and an electric heating element for heating the blue silica gel desiccant particles.

[0010] Preferably, an end cap is installed at the top of the transparent box, and an annular protrusion is provided at the bottom of the end cap. The other end of the annular protrusion is installed in an annular groove, and the annular groove is opened at the top of the transparent box. The annular protrusion on the end cap and the annular groove on the transparent box are connected by a threaded fit. Ventilation holes are provided on the surface of the end cap and the bottom of the transparent box.

[0011] Preferably, there are four electric heating elements, and the four electric heating elements are arranged in a ring array on the circumferential inner wall of the transparent box.

[0012] Preferably, the bottom of the transparent box is installed at the top of the heat-insulating air inlet pipe, and the outer circumferential wall of the transparent box and the inner circumferential wall of the heat-insulating air inlet pipe are connected by a threaded fit. The heat-insulating air inlet pipe is equipped with a solenoid valve and is located at the top of the handheld gas mass flow meter body.

[0013] Preferably, the top of the transparent box is installed at the bottom of the heat-insulating gas pipe connector, and the outer circumferential wall of the transparent box and the inner circumferential wall of the heat-insulating gas pipe connector are connected by a threaded fit.

[0014] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects:

[0015] 1. In this utility model, through a series of coordinated structural arrangements, when the device detects the gas mass flow rate of the gas being measured, the operator inserts the gas delivery pipe into the heat-insulated gas pipe connector on the air inlet mechanism. Before the gas being measured flows into the main body of the handheld gas mass flow meter, the pre-humidification component on the air inlet mechanism can remove moisture from the gas. Thus, this device effectively avoids interference from moisture in the gas on the internal sensors (such as thermal sensors, differential pressure sensors, etc.) of the handheld gas mass flow meter, reduces problems such as changes in thermal conductivity and sensor corrosion caused by moisture, and significantly improves the accuracy and stability of gas mass flow measurement.

[0016] 2. In this utility model, through a series of coordinated structural designs, operators can directly observe the color change of the blue silica gel desiccant particles through the transparent box. By observing the color change of the blue silica gel desiccant particles, operators can promptly determine whether the moisture absorption effect of the blue silica gel desiccant particles has reached saturation. This avoids the situation where the moisture absorption effect of the blue silica gel desiccant particles reaches saturation and affects the measurement structure. When the moisture absorption effect of the blue silica gel desiccant particles reaches saturation, operators can activate the electric heating element to heat the blue silica gel desiccant particles, causing them to dehydrate and allowing for reuse, thus improving the convenience of using this equipment. Attached Figure Description

[0017] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0019] Figure 2 This is a cross-sectional view of the air intake mechanism of this utility model.

[0020] Figure 3 This is an exploded structural diagram of the air intake mechanism of this utility model.

[0021] Figure 4 This is an exploded cross-sectional view of the dehumidification component of this utility model.

[0022] In the picture:

[0023] 100. Main body of handheld gas mass flow meter; 110. Gas inlet mechanism;

[0024] 111. Insulated air pipe connector; 112. Dehumidification assembly; 113. Insulated air inlet pipe;

[0025] 1121. End cap; 1122. Electric heating element; 1123. Transparent box body;

[0026] 1131. Solenoid valve. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0029] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0030] like Figure 1-4 As shown, a portable gas mass flow meter includes a handheld gas mass flow meter body 100 for detecting gas mass flow rate, and an air intake mechanism 110 is provided on the top of the handheld gas mass flow meter body 100 for receiving gas and discharging gas into the handheld gas mass flow meter body 100.

[0031] The air intake mechanism 110 is equipped with a dehumidification component 112 for removing moisture from the gas;

[0032] The dehumidification component 112 is equipped with a transparent box 1123 for filling with blue silica gel desiccant granules and an electric heating element 1122 for heating the blue silica gel desiccant granules. The blue silica gel desiccant granules can adsorb the moisture in the gas flowing into the transparent box 1123. After adsorbing moisture, the blue silica gel desiccant granules will change their color. When the blue silica gel desiccant granules are dry, they are blue. After absorbing water, they will turn into pink crystalline hydrates. Therefore, as the amount of moisture absorbed increases, the color of the desiccant granules will gradually change from blue to purple, and finally to light red. When the blue silica gel desiccant granules turn completely light red, it means that they have reached saturation in terms of moisture absorption. The staff can directly observe the color change of the blue silica gel desiccant granules through the transparent box 1123.

[0033] An end cap 1121 is installed on the top of the transparent box 1123. An annular protrusion is provided at the bottom of the end cap 1121. The other end of the annular protrusion is installed in an annular groove, which is located at the top of the transparent box 1123. The annular protrusion on the end cap 1121 and the annular groove on the transparent box 1123 are connected by a threaded engagement. Because the annular protrusion on the end cap 1121 and the annular groove on the transparent box 1123 are connected by a threaded engagement, it is convenient for staff to replace the blue silica gel desiccant particles inside the transparent box 1123. Ventilation holes are provided on the surface of the end cap 1121 and the bottom of the transparent box 1123.

[0034] There are four electric heating elements 1122, and the four electric heating elements 1122 are arranged in a ring array on the circumferential inner wall of the transparent box 1123. Because the four electric heating elements 1122 are arranged in a ring array on the circumferential inner wall of the transparent box 1123, the blue silica gel desiccant particles inside the transparent box 1123 can be effectively heated.

[0035] The bottom of the transparent box 1123 is installed at the top of the heat-insulating air inlet pipe 113, and the outer circumferential wall of the transparent box 1123 and the inner circumferential wall of the heat-insulating air inlet pipe 113 are connected by a threaded fit. The heat-insulating air inlet pipe 113 is equipped with a solenoid valve 1131. When the blue silica gel desiccant particles inside the transparent box 1123 are heated, the operator keeps the solenoid valve 1131 in the closed state to prevent the heated moisture from flowing into the handheld gas mass flow meter body 100. The heat-insulating air inlet pipe 113 is located at the top of the handheld gas mass flow meter body 100.

[0036] The top of the transparent box 1123 is installed at the bottom of the heat-insulating air pipe connector 111, and the outer circumferential wall of the transparent box 1123 and the inner circumferential wall of the heat-insulating air pipe connector 111 are connected by a thread. Because the outer circumferential wall of the transparent box 1123 and the inner circumferential wall of the heat-insulating air inlet pipe 113 are connected by a thread, and the outer circumferential wall of the transparent box 1123 and the inner circumferential wall of the heat-insulating air pipe connector 111 are connected by a thread, it is convenient to disassemble and assemble the dehumidification component 112.

[0037] Working Principle: During use, the operator connects the gas delivery tube to the insulated gas tube connector 111 on the air inlet mechanism 110. Before the gas to be measured flows into the handheld gas mass flow meter body 100, the pre-humidification component on the air inlet mechanism 110 removes moisture from the gas. This effectively prevents moisture in the gas from interfering with internal sensors of the handheld gas mass flow meter body 100, such as thermal sensors and differential pressure sensors. It also reduces problems such as changes in thermal conductivity and sensor corrosion caused by moisture, significantly improving the accuracy of gas mass flow measurement. For stability, staff can visually observe the color change of the blue silica gel desiccant particles through the transparent box 1123. By observing the color change of the blue silica gel desiccant particles, staff can promptly determine whether the moisture absorption effect of the blue silica gel desiccant particles has reached saturation. This avoids the situation where the moisture absorption effect of the blue silica gel desiccant particles reaches saturation and affects the measurement structure. When the moisture absorption effect of the blue silica gel desiccant particles reaches saturation, staff can activate the electric heating element 1122. The electric heating element 1122 heats the blue silica gel desiccant particles, causing them to dehydrate and allowing for reuse, thus improving the convenience of using this equipment.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the invention. For those skilled in the art, various modifications and variations can be made to this invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A portable gas mass flow meter, comprising a handheld gas mass flow meter body (100) for detecting gas mass flow rate, characterized in that: The top of the handheld gas mass flow meter body (100) is provided with an air intake mechanism (110) for receiving gas and discharging gas into the handheld gas mass flow meter body (100). The air intake mechanism (110) is provided with a dehumidification component (112) for removing moisture from the gas. The dehumidification assembly (112) is provided with a transparent box (1123) for filling with blue silica gel desiccant particles and an electric heating element (1122) for heating the blue silica gel desiccant particles.

2. The portable gas mass flow meter of claim 1, wherein: The top of the transparent box (1123) is fitted with an end cap (1121), and the bottom of the end cap (1121) is provided with an annular protrusion. The other end of the annular protrusion is installed in an annular groove, and the annular groove is opened at the top of the transparent box (1123). The annular protrusion on the end cap (1121) and the annular groove on the transparent box (1123) are connected by a threaded fit. Ventilation holes are opened on the surface of the end cap (1121) and the bottom of the transparent box (1123).

3. The portable gas mass flow meter of claim 1, wherein: There are four electric heating elements (1122), and the four electric heating elements (1122) are arranged in a ring array on the circumferential inner wall of the transparent box (1123).

4. The portable gas mass flow meter of claim 1, wherein: The bottom of the transparent box (1123) is installed at the top of the heat-insulating air inlet pipe (113), and the outer circumferential wall of the transparent box (1123) and the inner circumferential wall of the heat-insulating air inlet pipe (113) are connected by a threaded fit. The heat-insulating air inlet pipe (113) is equipped with a solenoid valve (1131), and the heat-insulating air inlet pipe (113) is located at the top of the handheld gas mass flow meter body (100).

5. The portable gas mass flow meter of claim 1, wherein: The top of the transparent box (1123) is installed at the bottom of the heat insulation pipe connector (111), and the outer circumferential wall of the transparent box (1123) and the inner circumferential wall of the heat insulation pipe connector (111) are connected by a threaded fit.

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