Flow meter for measuring 1000L gas mass per minute

Abstract

The utility model discloses a gas mass measurement flowmeter with 1000L per minute, which belongs to the technical field of flowmeters and comprises a flowmeter body, a test circuit board mounted on the flowmeter body through a connecting plastic part, a heating element and a temperature sensor electrically connected onto the test circuit board, a first PCB mounted on the connecting plastic part through an inner support, and a second PCB mounted on the connecting plastic part through an outer support. The first PCB is electrically connected with the test circuit board, the second PCB is electrically connected with the first PCB, the second PCB is provided with a contact pin, the contact pin is connected with a power source through a four-core wire, the shell covers the connecting plastic part and the inner support and is installed on the connecting plastic part, a penetrating through hole is formed in the flow meter body, and the two ends of the flow meter body are provided with a gas inlet and a gas outlet respectively. A through hole is formed in the position, making contact with gas, of the heating element on the end face of the flowmeter body, and the gas inlet and the gas outlet are each provided with a filter screen through a hole clamp spring and a sealing gasket. According to the device, the filter screens are arranged at the gas inlet and the gas outlet, so that the measurement accuracy is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of flow meter technology, specifically relating to a gas mass measurement flow meter with a flow rate of 1000L per minute. Background Technology

[0002] A 1000L / min gas mass flow meter is a precision instrument that measures gas mass flow rate using the principle of heat conduction. It typically consists of two reference-level resistance thermometers: a heater and a temperature sensor that measures changes in gas temperature. When the heater sensor is energized and heated to a set temperature and maintains a stable thermal equilibrium, the gas flowing through the heater carries away some heat, causing the sensor temperature to drop. The temperature sensor, located downstream of the heater sensor, measures the gas temperature change. The gas mass flow rate is determined by measuring the temperature difference between the heater and the temperature sensor; the temperature difference is proportional to the gas mass flow rate.

[0003] The 1000L / min gas mass flow meter operates on the principle of thermal diffusion or thermal conduction, calculating the mass flow rate of the gas by measuring the temperature change caused by the gas flowing through heating elements such as hot wires. This type of flow meter can directly display the standard volumetric flow rate without temperature or pressure compensation, providing high-precision flow measurement results under various operating conditions. It is widely used in industries such as petroleum, chemical, steel, metallurgy, power, light industry, pharmaceuticals, and environmental protection for detecting the flow rates of gases such as air, oxygen, nitrogen, hydrocarbon gases, natural gas, and coal gas.

[0004] Compared to ordinary thermal gas flow meters, the 1000L / min gas mass measurement flow meter uses an R12 internal thread connection. This connection method is more suitable for fixed installation, providing a more stable connection and applicable to a wider flow range.

[0005] However, in the use of existing flow meters, when gas enters the flow meter, it carries impurities such as liquid or foreign matter, which can affect the temperature change of the heater and thus affect the accuracy of the measurement. Utility Model Content

[0006] In view of the above-mentioned problems in the prior art, the purpose of this utility model is to provide a gas mass flow meter with a flow rate of 1000L per minute.

[0007] This utility model provides the following technical solution:

[0008] A gas mass flow meter with a capacity of 1000L / min includes a flow meter body, a test circuit board mounted on the flow meter body via a connecting plastic part, a heating element and a temperature sensor electrically connected to the test circuit board, PCB 1 mounted on the connecting plastic part via an inner support and electrically connected to the test circuit board, PCB 2 electrically connected to PCB 1 and having pins on it connected to a power supply via a four-core wire, an outer shell covering the connecting plastic part and the inner support and mounted on the connecting plastic part, a through hole inside the flow meter body with a gas inlet and a gas outlet at its two ends, and a through hole at the gas contact point of the heating element on the end face of the flow meter body, with filters installed at both the gas inlet and gas outlet through the holes using snap rings and sealing gaskets.

[0009] Specifically, a support component is installed at the bottom of the flow meter body.

[0010] Specifically, the connecting plastic part is installed on the flow meter body by screw one, the test circuit board is installed on the connecting plastic part by the circuit board pressure plate and screw two, and the outer shell is snapped into the connecting plastic part.

[0011] Specifically, the display PCB is electrically connected to PCB 2, and the display PCB is electrically connected to the up and down buttons, the menu button and the display panel. At the same time, the up and down buttons, the menu button and the display panel are installed on the housing, and the display PCB is located inside the housing.

[0012] Specifically, a circuit board sealing ring is provided between the test circuit board and the connecting plastic part, and a sealing ring is provided between the connecting plastic part and the flow meter body.

[0013] The beneficial effects of this utility model are:

[0014] 1. This device is equipped with filters at the gas inlet and gas outlet to ensure measurement accuracy;

[0015] 2. This device is designed with sealing gaskets and sealing rings to ensure the flow meter's sealing performance and prevent gas leakage;

[0016] 3. This device is equipped with a display panel, up and down keys, and a menu button, which can display the flow meter readings and facilitate user input to adjust the flow meter settings or view different measurement data, ensuring user convenience. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is an exploded view of this utility model;

[0019] The components in the diagram are labeled as follows: 1. Support component; 2. Hole retaining ring; 3. Filter screen; 4. Sealing gasket; 5. Flow meter body; 6. Sealing ring; 7. Connecting plastic part; 8. Circuit board sealing ring; 9. Screw 1; 10. Test circuit board; 11. Four-core wire; 12. Circuit board pressure plate; 13. Screw 2; 14. PCB 1; 15. Inner support; 16. PCB 2; 17. Pin; 18. Display PCB board; 19. Up and down buttons; 20. Menu button; 21. Outer casing; 22. Display panel. Detailed Implementation

[0020] like Figure 1 As shown, this utility model provides a gas mass flow meter with a flow rate of 1000L per minute, including a flow meter body 5, a test circuit board 10 mounted on the flow meter body 5 via a connecting plastic part 7, a heating element and a temperature sensor electrically connected to the test circuit board 10, a PCB-14 mounted on the connecting plastic part 7 via an inner support 15, and the PCB-14 is electrically connected to the test circuit board 10, a PCB-2 16 electrically connected to the PCB-14, and the PCB-2 16 is provided with a pin 17, which is connected to the power supply via a four-core wire 11, and a housing 21 covers the connecting plastic part 7 and the inner support 15, and the housing 21 is mounted on the connecting plastic part 7; the flow meter body 5 has a through hole inside, with a gas inlet and a gas outlet at its two ends, and a through hole is provided at the contact point between the heating element and the gas on the end face of the flow meter body, and a filter screen 3 is installed at both the gas inlet and the gas outlet through a retaining spring 2 and a sealing gasket 4.

[0021] When gas flows through the heating element, it carries away some heat, causing the element's temperature to drop. The flow meter uses a temperature sensor to measure this temperature change to estimate the gas flow rate. The higher the flow rate, the more heat is carried away, and the more significant the temperature drop. Furthermore, in this device, the gas is first filtered through filter 3 to ensure measurement accuracy.

[0022] Test circuit board 10 is used to test the electronic components of the flow meter to ensure that they are working properly; PCB 16 is used to connect to the power supply and provide power to various electronic components; PCB 14 is used to process the flow meter's signals and control logic.

[0023] Specifically, a support 1 is installed at the bottom of the flow meter body 5, which facilitates the subsequent fixing of the flow meter body 5 to other devices or locations.

[0024] Specifically, the connecting plastic part 7 is installed on the flow meter body 5 by screw 1 9, the test circuit board 10 is installed on the connecting plastic part 7 by the circuit board pressure plate 12 and screw 2 13, and the outer shell 21 is snapped onto the connecting plastic part 7.

[0025] Furthermore, to facilitate real-time monitoring and control of the flow meter by staff, the display PCB board 18 is electrically connected to PCB 16, and the display PCB board 18 is electrically connected to the up / down keys 19, the menu button 20, and the display panel 22. The up / down keys 19, the menu button 20, and the display panel 22 are mounted on the housing 21, and the display PCB board 18 is located inside the housing 21, thereby enabling the display of the flow meter reading and facilitating user input, adjustment of flow meter settings, or viewing of different measurement data.

[0026] Furthermore, in order to prevent the test circuit board 10 from being wetted by liquid carried by the gas or liquid from the external environment, and in order to prevent gas leakage, a circuit board sealing ring 8 is provided between the test circuit board 10 and the connecting plastic part 7, and a sealing ring 6 is provided between the connecting plastic part 7 and the flow meter body 5.

[0027] The working principle of this utility model is as follows:

[0028] The gas is first filtered through filter 3 to ensure measurement accuracy. Then, the gas enters the flow meter body 5, where the flow rate is measured by the built-in temperature sensor and heating element. During measurement, sealing gaskets 4 and 6 ensure the flow meter's airtightness, preventing gas leakage. All components of the flow meter are secured by screws 9 and 13, ensuring overall stability. Measurement data is initially processed by test circuit board 10 and then transmitted to PCBs 14 and 16, which further process the signals and control the flow meter's logic.

[0029] The processed data is sent to the display PCB board 18 and displayed to the user via the display panel 22. The user can interact with the flow meter using the up and down keys 19 and the menu button 20 to adjust settings or browse different measurement data. Throughout the process, the circuit board sealing ring 8 protects the electronic components from dust and moisture, while the circuit board clamping plate 12 ensures the stability of the circuit board during operation. The housing 21 protects all internal electronic components. The entire system is designed to provide accurate and reliable gas flow measurement while ensuring ease of operation for the user.

[0030] This device is equipped with filters 3 at the gas inlet and gas outlet to ensure measurement accuracy; it also features sealing gaskets 4 and 6 to ensure the flow meter's airtightness and prevent gas leakage; furthermore, the device has a display panel 22, up and down keys 19, and a menu button 20, which can display the flow meter readings and allow users to easily input and adjust the flow meter settings or view different measurement data, ensuring user convenience.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gas mass flow meter with a capacity of 1000L per minute, comprising a flow meter body, a test circuit board mounted on the flow meter body via connecting plastic parts, a heating element and a temperature sensor electrically connected to the test circuit board, PCB 1 mounted on the connecting plastic parts via an inner support and electrically connected to the test circuit board, PCB 2 electrically connected to PCB 1 and having pins on it connected to a power supply via a four-core wire, and a housing covering the connecting plastic parts and the inner support, with the housing mounted on the connecting plastic parts. Its features are, The flow meter body has a through hole inside, with a gas inlet and a gas outlet at its two ends. The heating element on the end face of the flow meter body has a through hole where it contacts the gas. Both the gas inlet and the gas outlet are fitted with filters through the holes using snap rings and sealing gaskets.

2. The gas mass flow meter with a flow rate of 1000L per minute according to claim 1, characterized in that, A support is installed at the bottom of the flow meter body.

3. The gas mass flow meter with a flow rate of 1000L per minute according to claim 1, characterized in that, The connecting plastic part is installed on the flow meter body by screw one, and the test circuit board is installed on the connecting plastic part by the circuit board clamping plate and screw two. The outer shell is snapped into the connecting plastic part.

4. The gas mass flow meter with a flow rate of 1000L per minute according to claim 1, characterized in that, The display PCB is electrically connected to PCB 2, and the display PCB is electrically connected to the up and down buttons, the menu button and the display panel. The up and down buttons, the menu button and the display panel are mounted on the housing, and the display PCB is inside the housing.

5. The gas mass flow meter with a flow rate of 1000 L / min according to any one of claims 1-4, characterized in that, A circuit board sealing ring is provided between the test circuit board and the connecting plastic part, and a sealing ring is provided between the connecting plastic part and the flow meter body.

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