Dual magnetic steel vortex flowmeter

Abstract

This utility model provides a dual-magnet vortex flow meter, relating to the field of oil extraction water injection detection technology. The flow meter includes a housing, an electrode assembly, a magnet cap, a first magnet, and a second magnet. The housing includes an internal flow channel, a vertically arranged cylinder, and a lower receiving seat. The electrode assembly is installed inside the cylinder, and the magnet cap is threadedly connected to the receiving seat. The first magnet is encapsulated between the receiving seat and the magnet cap, with its magnetization direction perpendicular to the extension direction of the flow channel. The second magnet is fixed to the bottom of the electrode assembly, with its magnetization direction parallel to the magnetization direction of the first magnet. This flow meter, through its dual-magnet structure design, solves the problem of insufficient magnetic field strength caused by a single-magnet structure, avoids weak pulse voltage signals acquired by the electrodes, significantly enhances the pulse voltage signal strength acquired by the electrodes, and improves the measurement accuracy and reliability of the flow meter.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction water injection detection technology, and more specifically, to a dual-magnetic vortex flow meter. Background Technology

[0002] In the field of water injection for oil extraction, accurate measurement of fluid flow rate is crucial. Vortex flow meters are often chosen due to their structural characteristics. However, in practical applications, especially under certain operating conditions, the measurement accuracy and effective range of the flow meter may be limited.

[0003] Existing vortex flow meters generally use a single magnet structure to generate the constant magnetic field required for operation. This magnetic field is the basis for the electrode assembly to detect the pulse voltage signal generated by the fluid cutting magnetic lines of force. However, the magnetic field strength generated by a single magnet is limited, which results in a weak original pulse voltage signal acquired by the electrode assembly. A weak signal directly affects the accuracy of subsequent signal processing and measurement, and limits the effective flow range that the flow meter can measure.

[0004] In summary, the technical problem of insufficient magnetic field strength caused by the single-magnet structure, resulting in weak pulse voltage signals acquired by the electrodes, is an urgent issue that needs to be addressed. Utility Model Content

[0005] The main objective of this invention is to provide a dual-magnetic vortex flowmeter, which at least solves the technical problem of insufficient magnetic field strength caused by the single-magnetic structure, resulting in weak pulse voltage signal acquired by the electrode, and significantly enhances the pulse voltage signal strength acquired by the electrode.

[0006] To achieve the above objectives, this utility model provides a dual-magnet vortex flow meter, comprising: a housing, an electrode assembly, a magnet cap, a first magnet, and a second magnet. The housing includes an internally disposed flow channel, a vertically arranged cylindrical body, and a lower receiving seat. The magnet cap is threadedly connected to the receiving seat. The electrode assembly is installed inside the cylindrical body. The first magnet is encapsulated between the receiving seat and the magnet cap, and the magnetization direction of the first magnet is perpendicular to the extension direction of the flow channel. The second magnet is fixed to the bottom of the electrode assembly, and the magnetization direction of the second magnet is parallel to the magnetization direction of the first magnet.

[0007] Specifically, the electrode assembly includes an electrode bushing and the second magnet. The upper end of the electrode bushing is provided with an annular groove for disassembling the electrode assembly. The second magnet is glued into a blind hole at the bottom of the electrode bushing.

[0008] Specifically, the electrode assembly further includes an electrode bushing, an electrode, and an electrode cap; the electrode is embedded inside the electrode bushing; the electrode cap is threadedly connected to the electrode bushing to press the electrode and the electrode bushing together.

[0009] Specifically, the lower side of the electrode bushing is provided with a generating hole that communicates with the flow channel; a flow divider is provided inside the generating hole.

[0010] Specifically, the outer diameter of the electrode bushing is provided with multiple sealing rings; the sealing rings are in a sealing fit with the inner wall of the cylinder.

[0011] Specifically, the flow meter also includes a stop pin, which is installed on the upper outer wall of the electrode bushing and engaged in a groove in the inner wall of the cylinder to restrict the axial movement and circumferential rotation of the electrode assembly.

[0012] Specifically, the flow meter also includes a clamping flange; the clamping flange is connected to the housing by screws to clamp and fix the electrode assembly inside the cylinder.

[0013] Specifically, the flow meter further includes a signal repeater and a smart meter head; the input terminal of the signal repeater is connected to the output terminal of the electrode assembly; and the output terminal of the signal repeater is connected to the smart meter head.

[0014] Specifically, the flow meter also includes a meter head branch pipe, a cover, and a locking nut; the lower end of the meter head branch pipe is connected to a clamping flange, and the upper end is connected to a smart meter head; the cover is located at the lower end of the meter head branch pipe; the bottom of the signal repeater passes through the cover and is locked and fixed by the locking nut.

[0015] Specifically, the connector is a boss structure, and the inner wall of the connector is provided with threads that match the magnet pressure cap.

[0016] This invention provides a dual-magnet vortex flow meter, comprising a housing, a magnet cap, an electrode assembly, a first magnet, and a second magnet. The housing has an internal flow channel, a vertical cylinder, and a lower mounting base. The electrode assembly is installed within the cylinder. The magnet cap is threaded to the mounting base. The first magnet is encapsulated between the mounting base and the magnet cap, with its magnetization direction perpendicular to the flow channel's extension direction, providing a basic magnetic field for the flow meter. The second magnet is fixed to the bottom of the electrode assembly, with its magnetization direction parallel to the first magnet, forming a superimposed magnetic field. This design, through its dual-magnet structure, solves the problem of insufficient magnetic field strength caused by a single magnet, avoiding weak pulse voltage signals acquired by the electrodes. The synergistic effect of the dual magnets significantly enhances the pulse voltage signal strength acquired by the electrodes, improving the flow meter's measurement accuracy and stability, making it suitable for industrial fluid measurement applications. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1This is a schematic diagram of the structure of an optional dual-magnetic vortex flow meter according to an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the electrode assembly structure of an optional dual-magnetic vortex flowmeter according to an embodiment of the present utility model.

[0020] 10. Shell; 11. Flow passage; 12. Cylinder; 13. Connector; 30. Magnet cap; 20. Electrode assembly; 31. Magnet one; 22. Magnet two; 21. Electrode bushing; 23. Electrode bushing; 24. Electrode; 25. Electrode cap; 26. Generating hole; 28. Diverter column; 27. Sealing ring; 100. Stop pin; 40. Compression flange; 50. Signal repeater; 60. Smart meter head; 70. Meter head branch pipe; 80. Cover; 90. Locking nut. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] like Figure 1 and Figure 2 As shown, a dual-magnetic vortex flowmeter according to an embodiment of the present invention includes: a housing 10, an electrode assembly 20, a magnet cap 30, a first magnet 31, and a second magnet 22. The housing 10 includes an internally disposed flow channel 11, a vertically arranged cylindrical body 12, and a lower receiving seat 13. The magnet cap 30 is threadedly connected to the receiving seat 13. The electrode assembly 20 is installed inside the cylindrical body 12. The first magnet 31 is encapsulated between the receiving seat 13 and the magnet cap 30, and the magnetization direction of the first magnet 31 is perpendicular to the extension direction of the flow channel 11. The second magnet 22 is fixed to the bottom of the electrode assembly 20, and the magnetization direction of the second magnet 22 is parallel to the magnetization direction of the first magnet 31.

[0023] Specifically, the electrode assembly 20 includes an electrode bushing 21 and a second magnet 22. The upper end of the electrode bushing 21 is provided with an annular groove for disassembling the electrode assembly 20. The second magnet 22 is glued into a blind hole at the bottom of the electrode bushing 21.

[0024] Specifically, the electrode assembly 20 further includes an electrode bushing 23, an electrode 24, and an electrode cap 25; the electrode 24 is embedded inside the electrode bushing 23; the electrode cap 25 is threadedly connected to the electrode bushing 21, pressing the electrode 24 and the electrode bushing 23 together.

[0025] Specifically, the lower side of the electrode bushing 21 is provided with a generating hole 26 that communicates with the flow channel 11; a flow divider 28 is provided inside the generating hole 26.

[0026] Specifically, the outer diameter of the electrode bushing 21 is provided with multi-stage sealing rings 27; the sealing rings 27 are sealed to the inner wall of the cylinder 12.

[0027] Specifically, the flow meter also includes a stop pin 100, which is installed on the upper outer wall of the electrode bushing 21 and inserted into the groove of the inner wall of the cylinder 12 to restrict the axial movement and circumferential rotation of the electrode assembly 20.

[0028] Specifically, the flow meter also includes a clamping flange 40; the clamping flange 40 is connected to the housing 10 by screws to clamp and fix the electrode assembly 20 inside the cylinder 12.

[0029] Specifically, the flow meter further includes a signal repeater 50 and a smart meter head 60; the input terminal of the signal repeater 50 is connected to the output terminal of the electrode assembly 20; and the output terminal of the signal repeater 50 is connected to the smart meter head 60.

[0030] Specifically, the flow meter also includes a meter head branch pipe 70, a cover 80, and a locking nut 90; the lower end of the meter head branch pipe 70 is connected to a clamping flange 40, and the upper end is connected to a smart meter head 60; the cover 80 is located at the lower end of the meter head branch pipe 70; the bottom of the signal repeater 50 passes through the cover 80 and is locked and fixed by the locking nut 90.

[0031] Specifically, the connector 13 has a boss structure, and the inner wall of the connector 13 is provided with threads that match the magnet cap 30. Example

[0032] This embodiment provides a dual-magnet vortex flow meter, including a housing 10, an electrode assembly 20, a magnet cap 30, a first magnet 31, a second magnet 22, a clamping flange 40, a signal repeater 50, a smart meter head 60, a meter head branch pipe 70, a cover 80, a locking nut 90, a stop pin 100, and a flow divider column 28. The connection relationships and functions of each component are as follows:

[0033] 1. Shell structure

[0034] The housing 10 includes an internally disposed flow channel 11, a vertically welded cylindrical body 12, and a machined boss-shaped seat 13 on the lower side.

[0035] Function: The flow channel 11 guides the flow of fluid, the cylinder 12 provides the mounting cavity for the electrode assembly 20, and the connector 13 fixes the magnet 31.

[0036] The inner wall of the connector 13 is provided with an M30×1.5 fine thread, which matches the external thread of the magnet cap 30.

[0037] 2. Magnet System

[0038] Magnet 31 is a neodymium iron boron permanent magnet, which is encapsulated between the connector 13 and the magnet cap 30. Its magnetization direction (NS pole axis) is perpendicular to the extension direction of the current channel 11.

[0039] Function: Generates a basic magnetic field perpendicular to the fluid, enhancing the efficiency of conductive liquid cutting magnetic field lines.

[0040] Magnet 22 is a neodymium iron boron permanent magnet of the same material, which is glued to the bottom blind hole of electrode bushing 21 with epoxy resin adhesive, and its magnetization direction is parallel to the magnetization direction of magnet 31.

[0041] Function: Superimpose to enhance the magnetic field strength, enabling electrode 24 to detect a stronger pulse voltage signal.

[0042] 3. Electrode assembly structure

[0043] Electrode assembly 20 includes electrode bushing 21, magnet 22, electrode bushing 23, electrode 24, electrode cap 25, generating hole 26, sealing ring 27, and flow divider 28.

[0044] The lower end of the electrode bushing 21 is provided with a generating hole 26 with a diameter of 5mm, and the generating hole 26 is connected to the flow channel 11;

[0045] The outer diameter of the electrode bushing 21 is provided with three O-rings 27 made of nitrile rubber, which are press-fitted with the inner wall of the cylinder 12 to achieve a seal.

[0046] An annular groove (3mm wide and 2mm deep) is machined on the upper end of the electrode bushing 21 to facilitate disassembly with special tools.

[0047] Electrode 24 (made of platinum-iridium alloy) is embedded inside electrode bushing 23 made of alumina ceramic, with a gap between them ≤0.1mm;

[0048] The electrode cap 25 is connected to the electrode bushing 21 via an M10 thread, pressing the electrode 24 and the electrode bushing 23 together.

[0049] A flow divider 28 is provided in the generating hole 26 on the lower side of the electrode bushing 21.

[0050] Function: The electrode bushing 23 isolates the electrode 24 from external conductive components, ensuring the purity of signal detection.

[0051] 4. Anti-displacement structure

[0052] The stop pin 100 (a stainless steel pin with a diameter of 3mm) passes through the pin hole at the upper end of the electrode bushing 21 and is engaged in the rectangular groove (3.2mm wide and 2mm deep) on the inner wall of the cylinder 12.

[0053] Function: To limit the axial displacement and circumferential rotation of the electrode assembly 20, and to ensure that the concentricity error between the generating hole 26 and the flow channel 11 is ≤0.05mm.

[0054] 5. Signal Processing Link

[0055] The clamping flange 40 is connected to the housing 10 by four sets of M8 stainless steel screws, which clamp and fix the electrode assembly 20 inside the cylinder 12.

[0056] The input terminal of the signal repeater 50 (model AD620 instrumentation amplifier) ​​is connected to electrode 24 via a silver-plated copper wire;

[0057] Function: Amplify microvolt-level pulse voltage signals by 100 times.

[0058] The smart meter head 60 (microcontroller) receives the signal from the output of the signal repeater 50, calculates the vortex frequency using the FFT algorithm, and converts it into a flow rate value.

[0059] 6. Install the fixing structure

[0060] The lower end of the meter head branch pipe 70 is connected to the clamping flange 40 via flange bolts, and the upper end is connected to the smart meter head 60 via flange bolts.

[0061] The cover 80 is installed inside the lower side of the meter head branch pipe 70, and the cover 80 has a stepped hole for accommodating the signal repeater 50.

[0062] The bottom screw section of the signal repeater 50 passes through the center hole of the cover 80;

[0063] The locking nut 90 is threadedly connected to the bottom screw section of the signal repeater 50, so that the cover 80 is clamped between the signal repeater 50 and the locking nut 90, thereby achieving locking and fixing.

[0064] 7. Fluid Detection Process

[0065] The conductive liquid flows into the flow channel 11 from the inlet end of the housing 10;

[0066] When the flow passes through the diverter column 28 fixed in the generating hole 26, a periodic Karman vortex street is formed;

[0067] Under the perpendicular action of the superimposed magnetic fields of magnet 31 and magnet 22, vortex street disturbance causes electrode 24 to cut magnetic field lines and generate pulse voltage signal.

[0068] The pulse voltage signal is transmitted to the signal repeater 50 through a silver-plated copper wire;

[0069] The AD620 instrumentation amplifier in signal repeater 50 amplifies the microvolt-level signal by 100 times;

[0070] The amplified signal is transmitted to the smart meter 60 via the shielded cable inside the meter head branch pipe 70.

[0071] The microcontroller of the smart meter 60 performs a Fast Fourier Transform (FFT) algorithm on the signal to extract the vortex shedding characteristic frequency;

[0072] Real-time flow data is output based on the preset flow conversion formula (Q=K×f, where Q is flow rate, K is meter coefficient, and f is frequency).

[0073] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dual-magnetic vortex flow meter, characterized in that, The flow meter includes: The housing (10) includes an internally disposed flow channel (11), a vertically arranged cylinder (12), and a lower receiving seat (13). The magnet cap (30) is threadedly connected to the connector (13); Electrode assembly (20) is installed inside the cylinder (12); Magnet 1 (31) is encapsulated between the connector (13) and the magnet cap (30), and the magnetization direction of the magnet 1 (31) is perpendicular to the extension direction of the flow channel (11). Magnet 2 (22) is fixed to the bottom of the electrode assembly (20), and the magnetization direction of magnet 2 (22) is parallel to the magnetization direction of magnet 1 (31).

2. The dual-magnetic vortex flowmeter according to claim 1, characterized in that: The electrode assembly (20) includes an electrode bushing (21) and the second magnet (22). The upper end of the electrode bushing (21) is provided with an annular groove to disassemble the electrode assembly (20). The magnet 2 (22) is glued into the blind hole at the bottom of the electrode bushing (21).

3. The dual-magnetic vortex flowmeter according to claim 2, characterized in that: The electrode assembly (20) also includes an electrode bushing (23), an electrode (24), and an electrode cap (25); The electrode (24) is embedded inside the electrode bushing (23); The electrode cap (25) is threadedly connected to the electrode bushing (21) to press the electrode (24) and the electrode bushing (23).

4. The dual-magnetic vortex flowmeter according to claim 3, characterized in that: The electrode bushing (21) has a generating hole (26) on its lower side that communicates with the flow channel (11). The generating hole (26) is provided with a diversion column (28).

5. The dual-magnetic vortex flowmeter according to claim 2, characterized in that: The outer diameter of the electrode bushing (21) is provided with multi-stage sealing rings (27); The sealing ring (27) is sealed to the inner wall of the cylinder (12).

6. The dual-magnetic vortex flowmeter according to claim 2, characterized in that: The flow meter also includes a stop pin (100), which is installed on the upper outer wall of the electrode bushing (21) and inserted into the groove of the inner wall of the cylinder (12) to restrict the axial movement and circumferential rotation of the electrode assembly (20).

7. The dual-magnetic vortex flowmeter according to claim 1, characterized in that: The flow meter also includes a clamping flange (40); The clamping flange (40) is connected to the housing (10) by screws to clamp and fix the electrode assembly (20) inside the cylinder (12).

8. The dual-magnetic vortex flowmeter according to claim 1, characterized in that: The flow meter also includes a signal repeater (50) and a smart meter head (60). The input terminal of the signal repeater (50) is connected to the output terminal of the electrode assembly (20); The output of the signal repeater (50) is connected to the smart meter (60).

9. The dual-magnetic vortex flowmeter according to claim 8, characterized in that: The flow meter also includes a meter head branch pipe (70), a cover (80), and a locking nut (90). The lower end of the meter head branch pipe (70) is connected to the clamping flange (40), and the upper end is connected to the smart meter head (60). The cover (80) is located at the lower end of the meter head branch pipe (70); The bottom of the signal repeater (50) passes through the cover (80) and is locked in place by the locking nut (90).

10. The dual-magnetic vortex flowmeter according to claim 1, characterized in that: The connector (13) has a boss structure, and the inner wall of the connector (13) is provided with a thread that matches the magnetic steel cap (30).

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