CN113494942A - Low-power consumption and wide-range electromagnetic water meter sensor - Google Patents

Abstract

The invention provides a low-power-consumption wide-range electromagnetic water meter sensor which comprises a measuring tube, an iron core, a magnetic yoke, an excitation coil, a magnetic conduction sheet, an electrode, a pressure sensor and a screw, wherein the measuring tube is made of an insulating material; the two magnetic conductive sheets are symmetrically pre-injected to the outer wall of the measuring pipe, and the middle parts of the outer sides of the magnetic conductive sheets are exposed out of the outer wall of the measuring pipe; the two measuring electrodes are pre-symmetrically injection-molded to the inner wall of the measuring pipe; the two magnetic conductive sheets are octagonal, and the center of each magnetic conductive sheet is provided with an opening; the outer wall of the measuring tube is symmetrically provided with two iron cores, and the two iron cores are wound with excitation coils; the electromagnetic metering is more accurate and precise through the optimization of the structure, the power consumption is lower, and the range is wider.

Description

Low-power consumption and wide-range electromagnetic water meter sensor

Technical Field

The invention relates to the technical field of electromagnetic water meters and electromagnetic flow meters, in particular to a design of sensors of the electromagnetic water meters and the electromagnetic flow meters, namely a design and a structure of a measuring tube kit.

Background

The electromagnetic water meter is manufactured according to the Faraday electromagnetic induction principle, the electromagnetic water meter is determined to be less influenced by bubbles and structures according to the principle, and the water meter is high in metering accuracy, free of flow blocking parts, sanitary, environment-friendly and has great advantages in the application of industries such as tap water supply and the like.

For electromagnetic water meters and electromagnetic flow meters, on one hand, the design of a measuring pipe section requires the performance of products such as low power consumption, high measuring accuracy and wide measuring range, when higher accuracy and wider measuring range are required, larger excitation voltage and excitation current are often required, and the larger excitation voltage and excitation current mean that larger power consumption is required, and particularly in electromagnetic water meters powered by batteries, the requirement on the batteries is higher, and the large power consumption means that the service life of the batteries is shortened, which is contradictory.

On the other hand, the conventional electromagnetic flowmeter includes electrodes, magnetic conductive sheets, an iron core, an excitation coil, etc., and if the combination of the components is not good, the following problems may be caused: 1. electrodes and pressure sensors of a measuring pipe section flow channel can cause water flow turbulence and unstable water flow, and the error and the accuracy of a product are influenced; 2 the possibility of water leakage exists in the electrode; 3. the product process is complex. The above situation increases the product cost, reduces the product reliability, and also affects the error and accuracy of the product.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides the electromagnetic water meter sensor with low power consumption and wide range, and the electromagnetic metering is more accurate through the optimization of the structure.

In order to achieve the above object, the technical solution of the present invention is as follows:

the utility model provides an electromagnetism water gauge sensor of low-power consumption, wide range, contains survey buret, iron core, yoke, excitation coil, magnetic conduction piece, electrode, pressure sensor, screw, characterized by:

the measuring tube is made of an insulating material;

the two magnetic conductive sheets are symmetrically pre-injected to the outer wall of the measuring pipe, and the middle parts of the outer sides of the magnetic conductive sheets are exposed out of the outer wall of the measuring pipe;

the two measuring electrodes are pre-symmetrically injected to the inner wall of the measuring pipe; the grounding electrode is injected to the inner wall of the measuring pipe in advance;

the two magnetic conductive sheets are octagonal, and the center of each magnetic conductive sheet is provided with an opening;

the outer wall of the measuring tube is symmetrically provided with two iron cores, and the two iron cores are wound with excitation coils;

the shape of the magnetic yoke is octagonal; the magnet yoke is sleeved on the periphery of the measuring tube and is fixedly connected with the measuring tube through screws;

the inner wall of the measuring pipe is provided with a pressure or temperature sensor; the pressure sensor is sealed in the measuring tube by the pressure ring.

The invention has the beneficial effects that:

(1) according to the electromagnetic water meter sensor with low power consumption and wide measuring range, the magnetic conductive sheets are injected to the inner pipe wall of the measuring pipe in advance, so that the distance between the two magnetic conductive sheets is as short as possible, according to the magnetic field principle, the magnetic resistance is in inverse proportion to the distance, the closer the magnetic conductive sheets are, the higher the magnetic induction intensity is, the smaller the required power consumption is; the larger the magnetic induction intensity is, the higher the sensitivity is, the wider the range is and the higher the accuracy is. The middle part of the outer part of the magnetic conductive sheet is exposed, so that the coil is directly contacted with the magnetic conductive sheet, the height of the coil is increased, and under the same number of turns, the height is increased, so that the thickness of the coil is reduced, the winding radius is reduced, the total length of the wire is shortened, the resistance is reduced, and the power consumption is reduced; the magnetic conductive sheet is injected to the part of the measuring pipe section, so that the strength of the flow guide pipe is also improved.

(2) According to the electromagnetic water meter sensor with low power consumption and wide range, the area of the magnetic conductive sheet can be reduced by cutting the angle and the edge of the magnetic conductive sheet, the area is reduced because the magnetic flux is in direct proportion to the area, so that the required magnetic flux is reduced, the magnetic flux is smaller, the excitation time is reduced, the required power consumption is lower, the weight function of the cut part is smaller, the contribution of the generated potential to the electrode voltage is small, and the whole potential is not influenced after the angle is cut.

(3) According to the electromagnetic water meter sensor with low power consumption and wide range, the electrodes are pre-injected to the inner pipe walls of the measuring pipes, the electrodes and the pipe walls are integrated and smooth, water flow turbulence and turbulent flow in the pipes can be reduced, product errors are small, accuracy is high, and the problem of water leakage in the traditional process of installing the electrodes is solved. (the traditional installation mode is that after the electrode is installed manually, an O-shaped ring and a spring are sleeved and then locked by screws).

(4) The pressure sensor is embedded in the measuring pipe, so that the contact surface of the pressure sensor and the inner wall of the measuring pipe are smooth, turbulence is avoided, the accuracy is improved, the reliability is high, and the cost is low.

(5) The magnetic yoke of the electromagnetic water meter sensor with low power consumption and wide range is octagonal, the shape of the magnetic yoke is closest to a circle, and an annular effective space formed between the magnetic yoke and the outer wall of the measuring tube is as large as possible, so that the height of a coil is as high as possible, the radius of a winding is small, the length of the winding is short under the same number of turns, the resistance of a copper wire is small, and the power consumption is low under the same number of ampere turns and current. In addition, the upper and lower planes of the octagonal shape on the magnetic yoke can be effectively contacted with the iron core, the left and right planes can make the upper and lower magnetic yokes effectively contacted, the contact area is large, the magnetic conduction effect is good, and the magnetic field loss is small. The distance between the octagonal magnetic yoke and the sides of the two magnetic conductive sheets is ensured to be as long as possible, more bypass magnetic fields are avoided, the magnetic fields in the flow channel between the two magnetic conductive sheets are uniformly distributed, the weight function is uniform, and the metering precision is not influenced if turbulent flow exists.

(6) The four screws arranged on the upper part and the lower part of the electromagnetic water meter sensor with low power consumption and wide range compress the magnet yoke, the magnet exciting coil and the magnetic conducting sheet, the conduction loss of the magnetic field is small outside, and the water flow part in the pipe is measured in a centralized manner, so that the magnetic field efficiency is higher.

Drawings

Fig. 1 is a schematic structural diagram of a low-power consumption and wide-range electromagnetic water meter sensor according to the invention.

FIG. 2 is a cross-sectional view of an electromagnetic water meter sensor A-A of the present invention with low power consumption and wide range.

Fig. 3 is a schematic diagram showing the comparison of the structures of four magnetic conductive sheets of the electromagnetic water meter sensor with low power consumption and wide measuring range.

FIG. 4 is a diagram of a magnetic yoke structure of a low-power-consumption wide-range electromagnetic water meter sensor according to the present invention

FIG. 5 is a top view of an electromagnetic water meter sensor yoke assembly with low power consumption and wide range in accordance with the present invention

Detailed Description

The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

As shown in figure 1 in combination with figure 2: a low-power-consumption wide-range electromagnetic water meter sensor comprises a measuring tube (1), an iron core (7), a magnet yoke (6), a magnet exciting coil (8), a magnetic conductive sheet (9), an electrode, a pressure sensor (3) and a screw (5);

the measuring tube is made of an insulating material, in this embodiment, a plastic material.

As shown in fig. 2: the two magnetic conductive sheets are symmetrically pre-embedded in the measuring tube, the middle part of the two magnetic conductive sheets is exposed out of the outer wall of the measuring tube, as indicated by L in the attached figure 2, according to the magnetic field principle, the magnetic resistance is inversely proportional to the distance, the closer the magnetic conductive sheets are, the higher the magnetic induction intensity is, and the smaller the required power consumption is; the larger the magnetic induction intensity is, the higher the sensitivity is, the wider the range is and the higher the accuracy is. The middle part of the outer part of the magnetic conductive sheet is exposed, so that the coil is directly contacted with the magnetic conductive sheet, the height of the coil is increased, the winding radius is reduced and the resistance is reduced under the same number of turns; the magnetic conductive sheet is injected to the part of the measuring pipe section, so that the strength of the magnetic conductive sheet is increased, and the design is ingenious.

The two measuring electrodes (10) are pre-symmetrically injection-molded to the inner wall of the measuring pipe, the grounding electrode (2) is pre-injection-molded to the inner wall of the water inlet end of the measuring pipe, the electrodes and the pipe wall are integrated and smooth, water flow turbulence and turbulence can be reduced, product errors are small, accuracy is high, and the problem of water leakage in the traditional electrode installation process is solved. (the traditional installation mode is that after the electrode is installed manually, an O-shaped ring and a spring are sleeved and then locked by screws).

In general, the shape of the magnetic conductive sheet is close to a square, and as shown in the attached figure 3-A, the magnetic conductive sheet has no corner or edge cutting; the magnetic conductive sheet of the patent has three shapes, as shown in attached figures 3-B, 3-C and 3-D, the three shapes of the magnetic conductive sheet can reduce the area of the magnetic conductive sheet, because the magnetic flux is in direct proportion to the area, the magnetic flux is small, the excitation time is reduced, the power consumption is low, the magnetic potential is smaller as the magnetic flux is smaller, the required excitation current is smaller, the corner cutting mode of the attached figure 3-C is adopted to be suitable for an electromagnetic water meter and an electromagnetic flow meter with medium and small apertures, the corner cutting mode of the attached figure 3-B is adopted to be suitable for an electromagnetic water meter and an electromagnetic flow meter with large aperture, the power consumption is lower as the corner cutting mode of the attached figure 3-D is adopted, but the requirement on the front straight pipe section is longer, the weight function is the voltage contribution of each point cutting line to the two ends of the magnetic force line, the weight function of the electric potential generated by the electromagnetic field of the cutting part is small, the voltage contribution to the electrode is small, the reduced area portion does not affect the overall potential.

As shown in fig. 4: the shape of the magnetic yoke is octagonal, the shape of the magnetic yoke is closest to circular, and an annular effective space formed between the magnetic yoke and the outer wall of the measuring tube is as large as possible, so that the height of the coil is as high as possible, the radius of the winding is small, the length of the winding is short under the same number of turns, the resistance of the copper wire is small, and the power consumption is small under the same number of ampere turns and current. In addition, the upper part and the lower part of the octagon on the magnetic yoke are planes, and the upper part and the lower part of each of 4 screws can be tightly and completely pressed with the iron core, so that the magnetic yoke is in effective contact with the iron core, the contact area is large and tight, the magnetic conduction effect is good, and the magnetic field loss is small. The left and right planes of the octagonal magnet yoke are tightly combined with the upper and lower magnet yokes in a large area through the left and right screws, the contact area is large and tight, the magnetic conduction effect is good, and the magnetic field loss is small. The octagonal magnet yoke ensures that the distance between the magnet yoke and the two magnetic conductive sheets is as long as possible, more bypass magnetic fields are avoided, the magnetic fields between the two magnetic conductive sheets are uniformly distributed, the weight function is more uniform, and the metering precision is not influenced if turbulent flows exist.

The outer wall symmetry of surveying buret is equipped with two iron cores, all around being equipped with excitation coil on two iron cores to two excitation coils establish ties each other.

The magnet yoke is sleeved on the periphery of the measuring tube, an annular space is formed between the magnet yoke and the outer wall of the measuring tube, and the iron core and the excitation coil are uniformly distributed in the annular space; as shown in fig. 5: the magnet yoke cover is arranged in survey the periphery of buret, with survey buret is fixed through screwed connection, compresses tightly magnet yoke, excitation coil, magnetic conduction piece, and the magnetic field is outside loss little, and the rivers part in the buret is surveyed in whole concentration for magnetic field efficiency is higher.

As shown in figure 1: the inner wall of the measuring pipe is provided with the pressure sensor (3) which can measure the pressure of the pipeline; the pressure sensor is sealed in the measuring tube by the pressure ring (4).

Claims (1)

1. The utility model provides an electromagnetism water gauge sensor of low-power consumption, wide range, contains survey buret, iron core, yoke, excitation coil, magnetic conduction piece, electrode, pressure sensor, screw, characterized by:

the measuring tube is made of an insulating material;

the two magnetic conductive sheets are symmetrically pre-injected to the outer wall of the measuring pipe, and the middle parts of the outer sides of the magnetic conductive sheets are exposed out of the outer wall of the measuring pipe;

the two measuring electrodes are pre-symmetrically injection-molded to the inner wall of the measuring pipe;

the two magnetic conductive sheets are octagonal, and the center of each magnetic conductive sheet is provided with an opening;

the outer wall of the measuring tube is symmetrically provided with two iron cores, and the two iron cores are wound with excitation coils;

the shape of the magnetic yoke is octagonal; the magnet yoke is sleeved on the periphery of the measuring tube and is fixedly connected with the measuring tube through screws;

the inner wall of the measuring pipe is provided with a pressure or temperature sensor; the pressure sensor is sealed in the measuring tube by the pressure ring.

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