Guide device of flow meter

Abstract

The utility model relates to the technical field of petroleum equipment, in particular to a guiding device of a flow meter, which is particularly suitable for solving the problem that gas-phase substances interfere with liquid-phase flow measurement. The impulse sensing type float flowmeter design is adopted, and a flow guide pipe double-channel structure is combined, so that efficient flow guide of gas-phase substances and stability of air pressure in a cavity are achieved; through the non-contact detection of the linear Hall sensor and the permanent magnet, the influence of mechanical wear on the measurement precision is eliminated. The inlet positions of the flow guide pipe A and the flow guide pipe B are designed in the liquid measuring cavity close to the accumulation position of gas-phase substances, and the gas-phase export efficiency is enhanced by utilizing the flow velocity inertia of the gas-phase substances. According to the guiding device of the flow meter, gas phase interference is effectively eliminated through the design method, the liquid phase flow metering precision is improved, and the guiding device is suitable for precise measurement of gas-liquid mixed media such as crude oil.

Description

Technical Field

[0001] This utility model relates to the field of petroleum equipment technology, specifically to a flow meter guiding device, which is particularly suitable for solving the problem of gaseous substances interfering with liquid flow measurement. Background Technology

[0002] Traditional float flowmeters, when measuring crude oil containing a gas-liquid mixture, suffer from measurement errors because the accumulation of gaseous substances in the liquid measuring chamber increases the internal pressure. This pressure causes the float to be lifted excessively, failing to accurately reflect the liquid flow rate. While existing technologies have attempted improvements through mechanical isolation or gas-liquid separators, these methods suffer from complex structures, low separation efficiency, and high maintenance costs. Therefore, there is an urgent need for a device capable of efficiently separating gaseous substances and stably measuring the liquid flow rate. Summary of the Invention

[0003] To address the aforementioned technical problems, a flow meter guiding device is provided. By optimizing the structure of the guide tube, the gaseous substance is rapidly guided from the liquid measuring chamber to the liquid outlet, avoiding pressure fluctuations within the chamber caused by gas accumulation, thereby improving the accuracy of liquid flow measurement. This utility model adopts the following technical solution:

[0004] A flow meter guiding device comprises an inlet, an outlet, a measuring chamber housing, a guide tube, a sealing flange, a protective housing, a digital display instrument, a measuring chamber, a measuring tube, a float, a float connecting rod, a permanent magnet, a Hall sensor protective housing, and a linear Hall sensor. The measuring chamber contains a float, a float connecting rod, a permanent magnet, a linear Hall sensor protective housing, and a linear Hall sensor. The float is connected to the permanent magnet via the float connecting rod. The guide tube system includes guide tube A and guide tube B, which are located on the side wall of the measuring chamber housing. Their inlets are located inside the measuring chamber near the accumulation of gaseous substances, and their outlets extend to a position near the outlet. Guide tube B and guide tube A form a pressure balance channel. The digital display instrument is located on top of the protective housing and calculates and displays the liquid flow rate based on Hall signals. The sealing flange adopts an explosion-proof sealing structure to ensure the safety of the device in flammable and explosive environments.

[0005] A flow meter guiding device is provided, wherein after crude oil enters the measuring chamber, the liquid phase substance pushes the float upward, and the gas phase substance adjusts the pressure difference inside and outside the measuring chamber through guide pipe A and guide pipe B and avoids the gas phase substance from stagnating in the chamber and is quickly discharged to the outlet; a linear Hall sensor generates an electrical signal through the position change of a permanent magnet, and a digital display instrument calculates the real-time flow rate and cumulative flow rate based on the linear relationship between the signal strength and the float displacement.

[0006] Preferably, the guide tube is located on the side wall of the liquid measuring chamber, with the inlet of the guide tube located inside the liquid measuring chamber near the accumulation of gaseous substances, and the outlet of the guide tube located near the liquid outlet.

[0007] Preferably, the float is fixed to the permanent magnet via a float connecting rod, and a linear Hall sensor is installed on the top of the liquid measuring chamber, forming a non-contact displacement detection system with the permanent magnet.

[0008] Preferably, the protective housing, sealing flange, and liquid measuring chamber housing are designed with corrosion-resistant and explosion-proof materials.

[0009] Preferably, the digital display instrument is a device that integrates data acquisition, processing, and data transmission functions.

[0010] The beneficial effects of this invention are as follows: It employs an impulse-type float flowmeter design, combined with a dual-channel structure of the guide tube, to achieve efficient flow guidance of gaseous substances and stable intracavity gas pressure; non-contact detection using a linear Hall sensor and permanent magnet eliminates the influence of mechanical wear on measurement accuracy; the inlet positions of guide tubes A and B are designed inside the liquid measuring chamber near the accumulation point of gaseous substances, utilizing the inertia of the gaseous substance flow velocity to enhance gas phase extraction efficiency. This flowmeter guidance device utilizes the above design method to effectively eliminate gaseous interference and improve the accuracy of liquid phase flow measurement, making it suitable for precise measurement of gas-liquid mixtures such as crude oil. Attached Figure Description

[0011] Figure 1 This is a top view schematic diagram of the guiding structure of a flow meter.

[0012] Figure 2 This is a three-dimensional structural diagram of a flow meter guide device.

[0013] Figure 3 This is a schematic cross-sectional view of the guide device for a flow meter in liquid and gas states.

[0014] Figure 4 This is another design structure diagram of the guide tube for a flow meter.

[0015] In the diagram: 101-Inlet, 102-Outlet, 201-Measuring chamber housing, 202-Guide tube A, 203-Guide tube B, 204-Sealing flange, 205-Protective housing, 206-Digital display instrument, 301-Measuring chamber, 302-Measuring tube, 303-Float, 304-Float connecting rod, 305-Permanent magnet, 306-Hall sensor protective housing, 307-Linear Hall sensor, 308-Guide tube inlet, 309-Guide tube outlet, 310-Liquid phase substance identification, 401-Guide tube. Detailed Implementation

[0016] This utility model embodiment provides a guiding device for a flow meter, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a flow meter guiding device includes an inlet 101, an outlet 102, a measuring chamber housing 201, a guide tube A 202, a guide tube B 203, a sealing flange 204, a protective housing 205, a digital display instrument 206, a measuring chamber 301, a measuring tube 302, a float 303, a float connecting rod 304, a permanent magnet 305, a Hall sensor protective housing 306, a linear Hall sensor 307, a guide tube inlet 308, a guide tube outlet 309, and a liquid phase substance identifier 310. The inlet 101 is the crude oil inlet, and the outlet 102 is the crude oil outlet. The measuring chamber 301 contains a float 303, a float connecting rod 304, a permanent magnet 305, a linear Hall sensor protective housing 306, and a linear Hall sensor 307. The float 303 is connected to the permanent magnet 305 via the float connecting rod 304. The guide pipe system includes guide pipe A202 and guide pipe B203, which are located on the side wall of the measuring chamber housing 201. Their inlets are located inside the measuring chamber 301 near the accumulation of gaseous substances, and their outlets extend to a position near the outlet 102. Guide pipe A202 and guide pipe B203 form a pressure balance channel. Figure 4 This is another design structure for the flow guide tube; the digital display instrument 206 is located on top of the protective housing 205, and the digital display instrument 206 calculates and displays the liquid flow rate based on the Hall signal; the sealing flange 204 adopts an explosion-proof sealing structure to ensure the safety of the device in flammable and explosive environments.

[0017] In an embodiment of this utility model, when the guiding device of a flow meter is in operation, crude oil flows through the inlet 101 and into the measuring chamber 301 via the measuring pipe 302. When the crude oil rushes into the measuring pipe 302, it will lift the float 303. The oil-in-oil gas contained in the crude oil will accumulate in the form of gaseous substances such as bubbles and gas clouds at the top of the internal space of the measuring chamber 301 after the crude oil rushes into the measuring chamber 301. At this time, the accumulated gaseous substances will be introduced into the guiding pipe A202 and the guiding pipe B203 respectively through the inlet 308 of the guiding pipe located near the accumulation of gaseous substances inside the measuring chamber 301, and then discharged into the outlet 102 through the outlet 309 of the guiding pipe located near the outlet 102, and then discharged from the metering pipeline. A flow meter guiding device uses a dual-channel design of a guide tube to guide gaseous substances from the liquid measuring chamber 301, and combines a linear Hall sensor 307 to detect the displacement of the float 303, effectively eliminating gaseous interference and improving the accuracy of liquid flow measurement.

[0018] The above description is a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A guiding device for a flow meter, characterized in that, The device comprises an inlet, an outlet, a liquid measuring chamber housing, a flow guide tube, a sealing flange, a protective housing, a digital display instrument, a liquid measuring chamber, a liquid measuring tube, a float, a float connecting rod, a permanent magnet, a Hall sensor protective housing, and a linear Hall sensor. The liquid measuring chamber contains a float, a float connecting rod, a permanent magnet, a linear Hall sensor protective housing, and a linear Hall sensor. The float is connected to the permanent magnet via the float connecting rod. The flow guide tube system includes flow guide tube A and flow guide tube B, which are located on the side wall of the liquid measuring chamber housing. Their inlets are located inside the liquid measuring chamber near the accumulation of gaseous substances, and their outlets extend to a position near the outlet. Flow guide tube B and flow guide tube A form a pressure balance channel. The digital display instrument is located on top of the protective housing and calculates and displays the liquid flow rate based on Hall signals. The sealing flange adopts an explosion-proof sealing structure to ensure the safety of the device in flammable and explosive environments.

2. The guiding device for a flow meter according to claim 1, characterized in that, The method involves the following steps: after crude oil enters the liquid measuring chamber, the liquid phase pushes the float upward, and the gas phase adjusts the pressure difference inside and outside the liquid measuring chamber through guide tube A and guide tube B, and avoids the gas phase from stagnating in the chamber and is quickly discharged to the outlet. The linear Hall sensor generates an electrical signal by changing the position of a permanent magnet. The digital display instrument calculates the real-time flow and cumulative flow based on the linear relationship between the signal strength and the float displacement.

3. The guiding device for a flow meter according to claim 1, characterized in that, The guide tube is located on the side wall of the liquid measuring chamber, with the inlet of the guide tube located inside the liquid measuring chamber near the accumulation of gaseous substances, and the outlet of the guide tube located near the liquid outlet.

4. The guiding device for a flow meter according to claim 1, characterized in that, The float is fixed to the permanent magnet via a float connecting rod, and a linear Hall sensor is installed on the top of the liquid measuring chamber, forming a non-contact displacement detection system with the permanent magnet.

5. The guiding device for a flow meter according to claim 1, characterized in that, The protective housing, sealing flange, and liquid measuring chamber housing are designed with corrosion-resistant and explosion-proof materials.

6. The guiding device for a flow meter according to claim 1, characterized in that, The digital display instrument is a device that integrates data acquisition, processing, and data transmission functions.

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