Self-cleaning electromagnetic flowmeter

Abstract

The utility model discloses a self-cleaning electromagnetic flowmeter, and particularly relates to the technical field of electromagnetic flowmeters, the self-cleaning electromagnetic flowmeter comprises an electromagnetic flowmeter shell, an electromagnetic flowmeter display is mounted on the electromagnetic flowmeter shell, and a built-in electrode is arranged at the top end in the electromagnetic flowmeter shell; a compressed air cleaning pipe is arranged at the top end of the interior of the connecting pipe, and the other end of the compressed air cleaning pipe is connected with an electromagnetic valve. One end of the shell of the electromagnetic flowmeter is connected with the connecting pipe, the compressed air cleaning pipe and the electromagnetic valve are arranged in the connecting pipe, the electromagnetic valve is in a normally-closed state, when the electromagnetic flowmeter does not work, the electromagnetic valve is opened, and compressed air accurately purges the surface of an electrode through the compressed air cleaning pipe. The electromagnetic flowmeter is simple in structure and convenient to use, the condition that the electrode generates a calcified membrane is effectively avoided, manual disassembly and cleaning are not needed, the service life of the electromagnetic flowmeter is prolonged, and it can be ensured that the built-in electrode of the electromagnetic flowmeter is not polluted or blocked within 2-3 years.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic flowmeters, in particular to a self-cleaning electromagnetic flowmeter. Background Art

[0002] Electromagnetic flowmeter is a flowmeter that measures flow based on Faraday's law of electromagnetic induction. Electromagnetic flowmeter has extremely small pressure loss and can measure a wide range of flow. The ratio of large flow to small flow is generally above 20:1. The applicable industrial pipe diameter range is wide, up to 3m. The output signal is linear with the measured flow, with high accuracy. It can measure the flow of acid, alkali, salt solution, water, sewage, corrosive liquid, mud, ore pulp, pulp and other fluids with conductivity ≥5μs / cm. When a conductor cuts the magnetic lines of force in a magnetic field, an induced potential will be generated in the conductor. The magnitude of the induced potential is proportional to the effective length of the conductor in the magnetic field and the speed at which the conductor moves perpendicular to the magnetic field in the magnetic field. Similarly, when a conductive fluid flows perpendicularly in a magnetic field and cuts the magnetic induction lines of force, an induced potential will also be generated on the electrodes on both sides of the pipeline.

[0003] The sensor transmits the induced potential as a flow signal to the converter. After amplification, conversion filtering and other signal processing, the instantaneous flow and cumulative flow are displayed on a dot matrix LCD with backlight. In a uniform magnetic field with magnetic induction intensity, a non-magnetic pipe with an inner diameter of D is placed perpendicular to the direction of the magnetic field. When the conductive liquid flows in the pipe at a flow rate v, the conductive fluid cuts the magnetic lines of force. If a pair of electrodes are installed at both ends of the diameter perpendicular to the magnetic field on the pipe cross section, it can be proved that as long as the flow velocity distribution in the pipe is axisymmetric, an induced electromotive force is generated between the two electrodes. The above is the working principle of the electromagnetic flowmeter.

[0004] It can be seen that the electromagnetic flowmeter measurement conditions must meet:

[0005] ①The magnetic field is a uniformly distributed constant magnetic field;

[0006] ② The velocity of the measured fluid is axially symmetrically distributed;

[0007] ③The measured liquid is non-magnetic;

[0008] ④The conductivity of the measured liquid is uniform and isotropic.

[0009] Electromagnetic flowmeters on the market all use electrodes as sensors, and the sensors are fixed and built-in. During long-term use, due to the presence of easily structured ions such as calcium and magnesium in the fluid, a calcified film may form on the electrode surface, causing the electromagnetic flowmeter electrode to be unable to accurately sense and detect, or even unable to read data and lose its metering function. If the electrode surface needs to be cleaned, the entire electromagnetic flowmeter needs to be disassembled and cleaned manually, which has high cleaning and maintenance costs and also poses the risk of stopping production for maintenance. Utility Model Content

[0010] The purpose of the utility model is to provide a self-cleaning electromagnetic flowmeter to solve the above-mentioned shortcomings in the technology.

[0011] In order to achieve the above object, the utility model provides the following technical solution: a self-cleaning electromagnetic flowmeter, comprising:

[0012] An electromagnetic flowmeter housing, an electromagnetic flowmeter display is installed on the electromagnetic flowmeter housing, a built-in electrode is provided at the top of the electromagnetic flowmeter housing, and the built-in electrode is electrically connected to the electromagnetic flowmeter display;

[0013] A connecting pipe, wherein the connecting pipe is arranged at one end of the electromagnetic flowmeter housing, a compressed air cleaning pipe is arranged at the top of the inner part of the connecting pipe, one end of the compressed air cleaning pipe extends to the bottom end of the built-in electrode, the other end of the compressed air cleaning pipe passes through the outer end of the connecting pipe and extends to the top of the connecting pipe, the other end of the compressed air cleaning pipe is connected to a solenoid valve, and one end of the solenoid valve is connected to a compressed air connecting hose.

[0014] Preferably, a first connecting ring is fixedly provided at one end of the electromagnetic flowmeter housing, and a second connecting ring is fixedly provided at one end of the connecting pipe close to the electromagnetic flowmeter housing, and the second connecting ring is in contact with the first connecting ring to facilitate the connection between the electromagnetic flowmeter housing and the connecting pipe.

[0015] Preferably, a third connecting ring is fixedly provided at one end of the connecting pipe away from the electromagnetic flowmeter housing, a liquid inlet pipe is provided at one end of the connecting pipe away from the electromagnetic flowmeter housing, and a fourth connecting ring is fixedly provided at one end of the liquid inlet pipe close to the connecting pipe, and the third connecting ring and the fourth connecting ring are in contact with each other to facilitate the connection between the connecting pipe and the liquid inlet pipe.

[0016] Preferably, a plurality of connecting rods are fixedly provided on one side of the first connecting ring close to the connecting tube, a plurality of first connecting holes are provided on the second connecting ring, and the plurality of connecting rods respectively pass through the plurality of first connecting holes, a plurality of second connecting holes are provided on the third connecting ring, and a plurality of third connecting holes are provided on the fourth connecting ring, and the central axes of the third connecting holes, the second connecting holes and the connecting rods coincide with each other.

[0017] Preferably, a plurality of connecting bolts are provided on the side of the fourth connecting ring away from the third connecting ring, one end of the connecting bolts passes through the third connecting hole and the second connecting hole, a connecting threaded hole is provided at one end of the connecting rod, one end of the connecting bolts extends into the connecting threaded hole and is threadedly connected to the connecting threaded hole, so as to facilitate fixing the connecting pipe between the electromagnetic flowmeter housing and the liquid inlet pipe.

[0018] Preferably, a fifth connecting ring is fixedly provided at the other end of the electromagnetic flowmeter housing, and a plurality of fourth connecting holes are opened on the fifth connecting ring to facilitate connection with an external liquid outlet pipe.

[0019] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0020] 1. By connecting a connecting pipe at one end of the electromagnetic flowmeter housing and setting a compressed air cleaning pipe and a solenoid valve in the connecting pipe, the solenoid valve is in a normally closed state. When the electromagnetic flowmeter is not working, open the solenoid valve, and the compressed air accurately blows the electrode surface through the compressed air cleaning pipe, effectively avoiding the occurrence of calcified film on the electrode. There is no need for manual disassembly and cleaning, which extends the service life of the electromagnetic flowmeter and ensures that the built-in electrode of the electromagnetic flowmeter will not be blocked by dirt within 2-3 years.

[0021] 2. By fixing the connecting pipe between the liquid inlet pipe and the electromagnetic flowmeter housing, the installation and removal of the connecting pipe are simpler and more convenient, thereby making the maintenance of the compressed air cleaning pipe and the solenoid valve more convenient and more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 It is a schematic diagram of the overall explosion structure of the utility model;

[0025] Figure 3 It is a schematic diagram of the overall three-dimensional cross-sectional structure of the utility model;

[0026] Figure 4 For the utility model Figure 3 A is a schematic diagram of the enlarged structure;

[0027] Figure 5 It is a schematic diagram of a three-dimensional cross-sectional structure of a connecting pipe, a first connecting ring and a connecting rod of the utility model;

[0028] Figure 6 It is a schematic diagram of the connection structure of the connecting pipe, compressed air cleaning pipe, solenoid valve and compressed air connecting hose of the utility model.

[0029] Description of reference numerals:

[0030] 1. Electromagnetic flowmeter housing; 2. Electromagnetic flowmeter display; 3. Built-in electrode; 4. Connecting pipe; 5. Compressed air cleaning pipe; 6. Solenoid valve; 7. Compressed air connecting hose; 8. First connecting ring; 9. Second connecting ring; 10. Connecting rod; 11. First connecting hole; 12. Third connecting ring; 13. Second connecting hole; 14. Liquid inlet pipe; 15. Fourth connecting ring; 16. Third connecting hole; 17. Connecting bolt; 18. Connecting threaded hole; 19. Fifth connecting ring; 20. Fourth connecting hole. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0032] The utility model provides Figures 1 to 6 A self-cleaning electromagnetic flowmeter is shown, comprising:

[0033] An electromagnetic flowmeter housing 1, an electromagnetic flowmeter display 2 is installed on the electromagnetic flowmeter housing 1, a built-in electrode 3 is provided at the top of the electromagnetic flowmeter housing 1, and the built-in electrode 3 is electrically connected to the electromagnetic flowmeter display 2;

[0034] A connecting pipe 4 is provided at one end of the electromagnetic flowmeter housing 1, a compressed air cleaning pipe 5 is provided at the top of the inner part of the connecting pipe 4, one end of the compressed air cleaning pipe 5 extends to the bottom end of the built-in electrode 3, the other end of the compressed air cleaning pipe 5 passes through the outer end of the connecting pipe 4 and extends to the top of the connecting pipe 4, the other end of the compressed air cleaning pipe 5 is connected to a solenoid valve 6, and one end of the solenoid valve 6 is connected to a compressed air connecting hose 7.

[0035] A first connecting ring 8 is fixedly provided at one end of the electromagnetic flowmeter housing 1, a second connecting ring 9 is fixedly provided at the end of the connecting pipe 4 close to the electromagnetic flowmeter housing 1, the second connecting ring 9 is in contact with the first connecting ring 8, a third connecting ring 12 is fixedly provided at the end of the connecting pipe 4 away from the electromagnetic flowmeter housing 1, a liquid inlet pipe 14 is provided at the end of the connecting pipe 4 away from the electromagnetic flowmeter housing 1, a fourth connecting ring 15 is fixedly provided at the end of the liquid inlet pipe 14 close to the connecting pipe 4, and the third connecting ring 12 is in contact with the fourth connecting ring 15.

[0036] A plurality of connecting rods 10 are fixedly provided on the side of the first connecting ring 8 close to the connecting pipe 4, a plurality of first connecting holes 11 are provided on the second connecting ring 9, and the plurality of connecting rods 10 pass through the first connecting holes 11 respectively, a plurality of second connecting holes 13 are provided on the third connecting ring 12, and a plurality of third connecting holes 16 are provided on the fourth connecting ring 15, and the central axes of the third connecting holes 16, the second connecting holes 13 and the connecting rods 10 coincide with each other, and a plurality of connecting bolts 17 are provided on the side of the fourth connecting ring 15 away from the third connecting ring 12, and one end of the connecting bolts 17 pass through the third connecting holes 16 and the second connecting holes 13, and a connecting threaded hole 18 is provided at one end of the connecting rod 10, and one end of the connecting bolt 17 extends into the connecting threaded hole 18 and is threadedly connected with the connecting threaded hole 18.

[0037] A fifth connecting ring 19 is fixedly provided at the other end of the electromagnetic flowmeter housing 1 , and a plurality of fourth connecting holes 20 are formed on the fifth connecting ring 19 .

[0038] Insert one end of the compressed air cleaning pipe 5 inside the connecting pipe 4 from one end of the electromagnetic flowmeter housing 1 into the electromagnetic flowmeter housing 1, and then insert one end of the multiple connecting rods 10 into the multiple first connecting holes 11. When the first connecting ring 8 and the second connecting ring 9 fit together, fit the fourth connecting ring 15 and the second connecting hole 13 together, and then pass one end of the connecting bolt 17 through the third connecting hole 16 and the second connecting hole 13. When one end of the connecting bolt 17 moves to one end of the connecting rod 10, use an external wrench to rotate the connecting bolt 17, and one end of the connecting bolt 17 will be screwed into the connecting threaded hole 18, so that the connecting pipe 4 can be clamped and fixed between the electromagnetic flowmeter housing 1 and the liquid inlet pipe 14. The other end of the electromagnetic flowmeter housing 1 can be connected to the liquid outlet pipe through the fifth connecting ring 19, so that the liquid passes through the liquid inlet pipe 14, the connecting pipe 4 and the inside of the electromagnetic flowmeter housing 1, and then is discharged from the liquid outlet pipe. The fixed built-in electrode 3 inside the electromagnetic flowmeter housing 1 can measure the amount of liquid flowing through;

[0039] When the electromagnetic flowmeter is not working, such as during the shutdown and maintenance period, the time-shifted operation period, etc., the compressed air connecting hose 7 is connected to the external air compressor, and the air compressor will generate compressed air with a working pressure of 8-1.0 bar. The solenoid valve 6 is opened, and the compressed air enters the compressed air cleaning pipe 5 through the compressed air connecting hose 7, and then blows onto the built-in electrode 3 through one end of the compressed air cleaning pipe 5. The compressed air will clean up the liquid residual contaminants such as calcified film on the built-in electrode 3.

[0040] The utility model connects a connecting pipe 4 at one end of the electromagnetic flowmeter housing 1 and sets a compressed air cleaning pipe 5 and a solenoid valve 6 in the connecting pipe 4. The solenoid valve 6 is in a normally closed state. When the electromagnetic flowmeter is not working, the solenoid valve 6 is opened, and the compressed air is accurately purged on the electrode surface through the compressed air cleaning pipe 5, effectively avoiding the occurrence of a calcified film on the electrode. There is no need for manual disassembly and cleaning, which extends the service life of the electromagnetic flowmeter and ensures that the built-in electrode 3 of the electromagnetic flowmeter will not be blocked by dirt within 2-3 years. This embodiment specifically solves the problem in the prior art that during the long-term use of the electromagnetic flowmeter, due to the presence of easily structured ions such as calcium and magnesium in the fluid, a calcified film may be formed on the electrode surface, thereby causing the electromagnetic flowmeter electrode to be unable to accurately sense and detect, and even unable to read data and lose its metering function. If the electrode surface needs to be cleaned, the entire electromagnetic flowmeter needs to be disassembled and manually cleaned, which has high cleaning and maintenance costs and the risk of stopping production for maintenance.

[0041] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A self-cleaning electromagnetic flowmeter, characterized in that: include: An electromagnetic flowmeter housing (1), an electromagnetic flowmeter display (2) being mounted on the electromagnetic flowmeter housing (1), a built-in electrode (3) being provided at the top end of the interior of the electromagnetic flowmeter housing (1), and the built-in electrode (3) being electrically connected to the electromagnetic flowmeter display (2); A connecting pipe (4), the connecting pipe (4) is arranged at one end of the electromagnetic flowmeter housing (1), a compressed air cleaning pipe (5) is arranged at the top of the connecting pipe (4), one end of the compressed air cleaning pipe (5) extends to the bottom end of the built-in electrode (3), the other end of the compressed air cleaning pipe (5) passes through the outer end of the connecting pipe (4) and extends to the top of the connecting pipe (4), the other end of the compressed air cleaning pipe (5) is connected to an electromagnetic valve (6), and one end of the electromagnetic valve (6) is connected to a compressed air connecting hose (7).

2. A self-cleaning electromagnetic flowmeter according to claim 1, characterized in that: A first connecting ring (8) is fixedly provided at one end of the electromagnetic flowmeter housing (1), and a second connecting ring (9) is fixedly provided at one end of the connecting pipe (4) close to the electromagnetic flowmeter housing (1), wherein the second connecting ring (9) and the first connecting ring (8) are in contact with each other.

3. A self-cleaning electromagnetic flowmeter according to claim 2, characterized in that: A third connecting ring (12) is fixedly provided at one end of the connecting pipe (4) away from the electromagnetic flowmeter housing (1), a liquid inlet pipe (14) is provided at one end of the connecting pipe (4) away from the electromagnetic flowmeter housing (1), a fourth connecting ring (15) is fixedly provided at one end of the liquid inlet pipe (14) close to the connecting pipe (4), and the third connecting ring (12) and the fourth connecting ring (15) are in contact with each other.

4. A self-cleaning electromagnetic flowmeter according to claim 3, characterized in that: A plurality of connecting rods (10) are fixedly provided on one side of the first connecting ring (8) close to the connecting pipe (4); a plurality of first connecting holes (11) are provided on the second connecting ring (9); the plurality of connecting rods (10) respectively pass through the interior of the plurality of first connecting holes (11); a plurality of second connecting holes (13) are provided on the third connecting ring (12); a plurality of third connecting holes (16) are provided on the fourth connecting ring (15); and the central axes of the third connecting holes (16), the second connecting holes (13) and the connecting rods (10) coincide with each other.

5. A self-cleaning electromagnetic flowmeter according to claim 4, characterized in that: A plurality of connecting bolts (17) are provided on a side of the fourth connecting ring (15) away from the third connecting ring (12), one end of each connecting bolt (17) passes through the third connecting hole (16) and the second connecting hole (13), and a connecting threaded hole (18) is provided at one end of the connecting rod (10), one end of each connecting bolt (17) extends into the connecting threaded hole (18) and is threadedly connected to the connecting threaded hole (18).

6. A self-cleaning electromagnetic flowmeter according to claim 1, characterized in that: A fifth connecting ring (19) is fixedly provided at the other end of the electromagnetic flowmeter housing (1), and a plurality of fourth connecting holes (20) are provided on the fifth connecting ring (19).

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