CN114577282A - Self-rectifying low-power-consumption electromagnetic water meter sensor - Google Patents
Self-rectifying low-power-consumption electromagnetic water meter sensor Download PDFInfo
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- CN114577282A CN114577282A CN202210279526.2A CN202210279526A CN114577282A CN 114577282 A CN114577282 A CN 114577282A CN 202210279526 A CN202210279526 A CN 202210279526A CN 114577282 A CN114577282 A CN 114577282A
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- 238000011144 upstream manufacturing Methods 0.000 claims description 50
- 238000010079 rubber tapping Methods 0.000 claims description 31
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 claims description 7
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- 230000007704 transition Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 abstract description 8
- 239000012530 fluid Substances 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 10
- 239000000956 alloy Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000004080 punching Methods 0.000 description 4
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- 230000006698 induction Effects 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000005674 electromagnetic induction Effects 0.000 description 1
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- 239000010935 stainless steel Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/18—Supports or connecting means for meters
- G01F15/185—Connecting means, e.g. bypass conduits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a self-rectifying low-power-consumption electromagnetic water meter sensor which comprises a shell, a self-rectifying flow tube and a pressure sensing unit, wherein the self-rectifying flow tube and the pressure sensing unit are arranged in the shell, a downstream connecting flange is arranged at the other end port of the downstream cylindrical section of the rectifying flow tube, a pressure taking hole is also processed in the downstream connecting flange and penetrates through the downstream connecting flange along the thickness direction of the flange, and the pressure taking hole is communicated with a pressure taking channel of the pressure sensing unit, so that the phenomenon that the pipeline is rotten due to the fact that an insulating layer is damaged when holes are punched in the flow tube is avoided, the service life of the flow tube is prolonged, and the detection precision of the flow tube is improved. The rectification type flow tube realizes the gradual rectification of the circular to rectangular section of the port of the rectification flow tube, so that the fluid flow field of the rectification flow tube in the electromagnetic water meter sensor arranged behind the valve, the bent tube and the branch tube tends to be stable, and the detection precision is improved. The rectangular section of the rectification flow tube is designed to enlarge the installation area of the excitation coil and the magnetic pole plate, and simultaneously, the distance between the two poles of the magnetic pole plate is shortened, so that the magnetic fields between the two poles of the magnetic pole plate tend to be the same.
Description
Technical Field
The invention relates to the field of water meter sensor structures, in particular to a self-rectifying low-power-consumption electromagnetic water meter sensor.
Background
The electromagnetic water meter is designed based on Faraday's law of electromagnetic induction, the measuring pipe of the electromagnetic water meter sensor is a non-magnetic conducting alloy pipe lined with insulating material, two electrodes penetrate through the pipe wall along the pipe diameter direction and are fixed on the measuring pipe, and when the excitation coil is excited by pulse, a working magnetic field is generated in the direction perpendicular to the measuring pipeline.
In an urban pipe network, an electromagnetic water meter sensor is often mounted on a valve, a bend and a pipeline branch working condition pipeline, and the detection precision of the electromagnetic water meter sensor is influenced by relatively disordered liquid flow fields flowing out of the valve, the bend and the pipeline branch working condition pipeline; in wisdom water utilities pipe network uses, the electromagnetism water gauge often need install on mountain area, inspection shaft, bridge pipeline, can't provide the commercial power, needs water gauge itself to take the battery continuation of the journey function, consequently for the continuation of the journey function of ensureing the electromagnetism water gauge, need reduce electromagnetic sensor's energy consumption under the condition of not losing magnetic field intensity and measurement accuracy when increasing electromagnetic water gauge sensor's electric quantity deposit.
Disclosure of Invention
The invention provides a self-rectifying low-power consumption electromagnetic water meter sensor with a self-rectifying flow tube, which has high measurement precision and aims to solve the problems that the electromagnetic water meter sensor in the prior art is greatly influenced by a liquid flow field and the energy consumption of the sensor needs to be reduced under the conditions of not losing the magnetic field intensity and the measurement precision.
In order to achieve the purpose, the invention adopts the following technical scheme:
a self-rectifying low-power-consumption electromagnetic water meter sensor comprises a shell, a self-rectifying flow tube and a pressure sensing unit, wherein the self-rectifying flow tube and the pressure sensing unit are arranged in the shell, the rectifying flow tube comprises an upstream cylindrical section, a downstream cylindrical section and a rectangular section, the upstream cylindrical section and the downstream cylindrical section are sequentially connected end to end, the rectangular section is arranged between one end of the upstream cylindrical section and one end of the downstream cylindrical section, a first rectangle of the radial section of the rectangular section is a quadrangle of which four corners are round chamfers, and a first horn section gradually indented from a circle to the first rectangle is arranged between one end of the upstream cylindrical section and the rectangular section; a second horn section which is gradually enlarged from a first rectangle to a circle is arranged between the rectangular section and one end of the downstream cylindrical section;
two measuring electrodes are oppositely arranged on two short sides of the rectangular section, magnetic circuit units are arranged on two opposite long sides of the rectangular section, and the direction of magnetic force lines generated by the magnetic circuit units in the rectifying flow pipe is perpendicular to the direction of the electrodes of the measuring electrodes;
the other end port department of the downstream cylinder section of the rectification flow tube is provided with a downstream connecting flange, a pressure taking hole is further processed on the downstream connecting flange, the pressure taking hole penetrates through the downstream connecting flange along the thickness direction of the flange, and the pressure taking hole is communicated with a pressure taking channel of the pressure sensing unit.
The width of the rectangular section, the width of the first horn section and the width of the second horn section in the electrode direction are the same as those of the upstream cylindrical section and the downstream cylindrical section, and the inner surfaces of the first horn section and the second horn section are in arc transition, so that the gradual rectification from the circular to the rectangular section of the port of the rectification flow pipe is realized, and the magnetic field and the electrode layout are realized. The inside insulating layer that is equipped with of flow tube, the pressure taking passageway communicates with each other with flow tube inside through the pressure taking hole of low reaches flange and gets the pressure, has avoided punching on the flow tube and has destroyed the insulating layer thereby cause the rotten pipe of pipeline. The radial section of the first cylindrical section is a first circular ring, the radial section of the second cylindrical section is a second circular ring, the maximum distance between two short sides of the first rectangle is smaller than the diameter of the first circular ring, and the maximum distance between two short sides of the first rectangle is smaller than the diameter of the second circular ring. The flow field of the fluid tends to be stable when the liquid in different flow fields passes through the rectangular section of the rectification flow tube, so that the flow field of the fluid in the rectification flow tube in the electromagnetic water meter sensor arranged behind the valve, the bent tube and the branch tube tends to be stable, and the detection precision is improved.
Preferably, the pressure tapping channel comprises a straight hole pressure tapping channel and an inclined hole pressure tapping channel, the straight hole pressure tapping channel is perpendicular to the axial central line of the rectification flow tube, one end of the inclined hole pressure tapping channel is connected with one end of the straight hole pressure tapping channel, the other end of the inclined hole pressure tapping channel is connected with a pressure tapping hole of the downstream connecting flange, and an included angle exists between the axial central line of the inclined hole pressure tapping channel and the axial central line of the straight hole pressure tapping channel. The inside insulating layer that is equipped with of flow tube, the pressure taking passageway communicates with each other with flow tube inside through the pressure taking hole of low reaches flange and gets the pressure, has avoided punching on the flow tube and has destroyed the insulating layer thereby cause the rotten pipe of pipeline.
Preferably, the pressure sensing unit further comprises a ball valve, the ball valve is connected with a connecting flange at the other end of the straight hole pressure tapping channel through a ball valve connecting seat arranged at the lower end of the ball valve, and a pressure sensor is arranged above the ball valve. And a pressure sensor is arranged at the lower end joint of the ball valve and the upper end of the connecting flange welded ball valve to realize pressure detection.
Preferably, the magnetic circuit unit comprises a polygonal rhombic magnetic yoke, magnetic cores are arranged on two opposite sides of the magnetic yoke, one end of each magnetic core is connected with the inner surface of the magnetic yoke, the other end of each magnetic core is connected with a magnetic pole plate, the magnetic cores are wound with excitation coils in the circumferential direction, and the other magnetic pole plates are oppositely arranged on the outer surfaces of the long sides of the rectangular sections of the rectifying flow tubes. The rectangular section of the rectification flow tube is designed to enlarge the installation area of the excitation coil and the magnetic pole plate, and simultaneously, the distance between the two poles of the magnetic pole plate is shortened, so that the magnetic fields between the two poles of the magnetic pole plate tend to be the same.
The magnetic yoke structure with the polygonal rhombus has a better magnetic field intensity enhancing effect than a circular magnetic yoke, and further realizes the effect of a low-current high-magnetic field.
Preferably, the long side surface of the rectangular section of the rectification flow tube is provided with a magnetic pole plate limiting groove and a wiring groove for mounting a magnetic circuit unit, the rectification transition surface in the magnetic field direction of the second horn section is provided with a reference electrode mounting hole, and a reference electrode is mounted in the reference electrode mounting hole. Electrode wires of the reference electrode and the measuring electrode are led out to be electrically connected with a connecting seat at the outer side of the plate wrapping section.
Preferably, the other end of the upstream cylindrical end is provided with an upstream connecting flange, the shell comprises a side plate section and a plate wrapping section, the side plate section is divided into an upstream side plate ring and a downstream side plate ring, the upstream side plate ring is sleeved outside the upstream cylindrical section and the first horn section in a penetrating manner, one end of the upstream side plate ring is fixedly welded with the upstream connecting flange, and the other end of the upstream side plate ring is fixedly welded with one end of the plate wrapping section; the downstream side plate ring is sleeved outside the downstream cylindrical section and the second horn section in a penetrating mode, one end of the downstream side plate ring is fixedly welded with the other end of the plate wrapping section, the other end of the downstream side plate ring is fixedly welded with the downstream flange, and a magnetic shielding layer is arranged on the inner side of the plate wrapping section. The package board section is worn to overlap in the yoke periphery, and the inboard magnetic screen layer of package board forms the magnetic screen circle, and the inside and outside magnetic field of separation shell prevents that the inside and outside magnetic field of shell from causing mutual interference.
Preferably, the outer side of the wrapper sheet section is provided with a connecting seat, and electrode wire leading-out of the reference electrode and the measuring electrode is electrically connected with the connecting seat. The height of the reference electrode from the axial center of the flow tube is smaller than the length of the radius of the upstream cylindrical section, and the height of the reference electrode from the axial center of the flow tube is smaller than the radius of the downstream cylindrical section, so that the reference electrode collects and draws out the reference potential of the medium in the flow tube.
Preferably, the upstream and downstream connecting flanges are grounded. The upstream connecting flange and the downstream connecting flange are in contact with the medium in the rectifying flow pipe, and the upstream connecting flange and the downstream connecting flange are grounded simultaneously, so that the medium in the rectifying flow pipe has a grounding effect.
Preferably, the magnetic pole plate, the magnetic core and the magnetic yoke are made of 1J50 iron-nickel alloy material. The 1J50 iron-nickel alloy material has higher saturation magnetic induction intensity and magnetic conductivity, realizes low current drive and high magnetic field output, reduces the energy consumption of the electromagnetic water meter sensor, and further prolongs the service life of the electromagnetic water meter sensor under the condition of the same electric quantity support. The iron-nickel alloy is subjected to a vacuum heat treatment process, wherein the vacuum heat treatment is carried out under the protection of inert gas, the heat treatment temperature is 650-800 ℃, the heat preservation time is 6-8 hours, and the heat treatment furnace is a continuous heat treatment furnace.
Therefore, the invention has the following beneficial effects: (1) the rectification type flow tube is adopted to realize the gradual rectification of the circular to rectangular section of the port of the rectification flow tube, so that the fluid flow field of the rectification flow tube in the electromagnetic water meter sensor arranged behind the valve, the bent tube and the branch tube tends to be stable, and the detection precision is improved. (2) The rectangular section of the rectification flow tube is designed to enlarge the installation area of the excitation coil and the magnetic pole plate, and simultaneously, the distance between the two poles of the magnetic pole plate is shortened, so that the magnetic fields between the two poles of the magnetic pole plate tend to be the same. (3) The pressure measuring channel is communicated with the interior of the flow tube through the pressure measuring hole of the downstream connecting flange to measure pressure, so that the phenomenon that the pipeline is rotten due to the fact that an insulating layer is damaged by punching on the flow tube is avoided, the service life of the flow tube is prolonged, and the detection precision of the flow tube is improved.
Drawings
Fig. 1 is a schematic structural view of a rectification flow tube of an electromagnetic water meter sensor according to an embodiment of the invention.
Fig. 2 is a top view of a flow tube of an electromagnetic water meter sensor rectifier according to an embodiment of the invention.
Fig. 3 is a left side view of a flow tube for rectifying a flow of an electromagnetic water meter sensor in accordance with an embodiment of the present invention.
Fig. 4 is a cross-sectional schematic view of a magnetic circuit unit of an electromagnetic water meter sensor according to an embodiment of the present invention.
Fig. 5 is a schematic view of the bottom of a magnetic pole plate of an electromagnetic water meter sensor in accordance with an embodiment of the present invention.
Fig. 6 is a cross-sectional view of a magnetic yoke of an electromagnetic water meter sensor in accordance with an embodiment of the present invention.
Fig. 7 is a structural sectional view of a pressure sensing unit of an electromagnetic water meter sensor according to an embodiment of the invention.
Fig. 8 is a schematic structural diagram of an electromagnetic water meter sensor according to an embodiment of the invention.
In the figure: 1. the flow tube comprises a shell 2, a rectification flow tube 3, an upstream cylindrical section 4, a downstream cylindrical section 5, a rectangular section 6, a first horn section 7, a second horn section 8, a straight hole pressure tapping channel 9, an inclined hole pressure tapping channel 10, a pressure sensing unit 11, a magnetic yoke 12, a magnetic core 13, an excitation coil 14, a magnetic pole plate 15, a reference electrode 16, a measuring electrode 17, a connecting seat 18, a ball valve 19, a connecting flange 20, an upstream connecting flange 21, an upstream side plate ring 22, a plate wrapping section 23 and a magnetic shielding layer.
Detailed Description
The invention is further described with reference to the following detailed description and accompanying drawings.
Example (b):
a self-rectifying low-power-consumption electromagnetic water meter sensor adopts a rectifying flow tube 2, as shown in figures 1, 2 and 3, the rectifying flow tube 2 comprises an upstream cylindrical section 3, a downstream cylindrical section 4 and a rectangular section 5 arranged between one end of the upstream cylindrical section 3 and one end of the downstream cylindrical section 4, which are sequentially connected end to end, an insulating layer is arranged in the flow tube, a first rectangle of the radial section of the rectangular section 5 is a quadrangle of which four corners are round chamfers, and a first horn section 6 gradually retracted from a circle to the first rectangle is arranged between one end of the upstream cylindrical section 3 and the rectangular section 5; a second horn section 7 which is gradually enlarged from a first rectangle to a circle is arranged between the rectangular section 5 and one end of the downstream cylindrical section 4;
two measuring electrodes 16 are oppositely arranged on two short sides of the rectangular section 5, the measuring electrodes 16 are positioned on the central axis of the two short sides of the rectangular section 5, two opposite long sides of the rectangular section 5 are provided with magnetic circuit units, and the direction of magnetic force lines generated by the magnetic circuit units in the rectifying flow tube 2 is vertical to the electrode direction of the measuring electrodes 16; the long side surface of the rectangular section 5 of the rectification flow tube 2 is provided with a magnetic pole plate 14 limiting groove and a wiring groove for mounting a magnetic circuit unit, a reference electrode 15 mounting hole is formed in the rectification transition surface of the second horn section 7 in the magnetic field direction, and a reference electrode 15 is mounted in the reference electrode 15 mounting hole.
The height of the reference electrode 15 from the axial center of the flow tube is less than the length of the radius of the upstream cylindrical section 3, and the height of the reference electrode 15 from the axial center of the flow tube is less than the radius of the downstream cylindrical section 4, so that the reference electrode 15 collects and leads out the reference potential of the medium in the flow tube.
The widths of the rectangular section 5, the first horn section 6 and the second horn section 7 in the electrode direction are the same as those of the upstream cylindrical section 3 and the downstream cylindrical section 4, the inner surfaces of the first horn section 6 and the second horn section 7 are in arc transition, gradual rectification from the circular to the rectangular section 5 of the port of the rectification flow tube 2 is achieved, and the magnetic field and the electrode layout are achieved. The radial section of the first cylindrical section is a first circular ring, the radial section of the second cylindrical section is a second circular ring, the maximum distance between two short sides of the first rectangle is smaller than the diameter of the first circular ring, and the maximum distance between two short sides of the first rectangle is smaller than the diameter of the second circular ring. The fluid flow field of the liquid in different flow fields tends to be stable when the liquid passes through the rectangular section 5 of the rectification flow tube 2, the fluid flow field of the rectification flow tube 2 in the electromagnetic water meter sensor arranged behind the valve, the bent tube and the branch tube tends to be stable, and the detection precision is improved.
The other end of the upstream cylindrical end of the rectifying flow tube 2 is provided with an upstream connecting flange 20, the other end port of the downstream cylindrical section 4 of the rectifying flow tube 2 is provided with a downstream connecting flange, the upstream connecting flange 20 and the downstream connecting flange are grounded, and a radial 0-shaped ring groove and an installation positioning groove are machined in the upstream flange and the downstream flange. The upstream connecting flange 20 and the downstream connecting flange are in contact with the medium in the rectifying flow pipe 2, and the upstream connecting flange 20 and the downstream connecting flange are grounded, so that the medium in the rectifying flow pipe 2 has a grounding effect.
And the downstream connecting flange is also provided with a pressure taking hole, the pressure taking hole penetrates through the downstream connecting flange along the thickness direction of the downstream connecting flange, and the pressure taking hole is communicated with a pressure taking channel of the pressure sensing unit 10. As shown in fig. 7, an inclined hole pressure tapping channel 9 and a straight hole pressure tapping channel 8 are processed on the downstream connecting flange, the straight hole pressure tapping channel 8 is perpendicular to the axial central line of the rectification flow pipe 2, one end of the inclined hole pressure tapping channel 9 is connected with one end of the straight hole pressure tapping channel 8, the other end of the inclined hole pressure tapping channel 9 is connected with a pressure tapping hole of the downstream connecting flange, and an included angle exists between the axial central line of the inclined hole pressure tapping channel 9 and the axial central line of the straight hole pressure tapping channel 8.
The other end of the straight hole pressure taking channel 8 is provided with a connecting flange 19, a ball valve 18 is welded with the connecting flange 19 of the straight hole pressure taking channel 8 through a ball valve 18 connecting seat 17 arranged at the lower end of the ball valve 18, and a pressure sensor is arranged above the ball valve 18.
The magnetic circuit unit comprises a polygonal rhombic magnetic yoke 11 as shown in fig. 6, magnetic cores 12 are arranged on two opposite sides of the magnetic yoke 11, one end of each magnetic core 12 is connected with the inner surface of the magnetic yoke 11, the other end of each magnetic core 12 is connected with a magnetic pole plate 14, an excitation coil 13 is wound on the periphery of each magnetic core 12 as shown in fig. 5, and the other magnetic pole plate 14 is oppositely arranged on the outer surface of the long side of the rectangular section 5 of the rectifying flowmeter 2. The magnetic pole plate 14, the magnetic core 12 and the magnetic yoke 11 are made of 1J50 iron-nickel alloy materials. The 1J50 iron-nickel alloy material has higher saturation magnetic induction intensity and magnetic conductivity, realizes low current drive and high magnetic field output, reduces the energy consumption of the electromagnetic water meter sensor, and further prolongs the service life of the electromagnetic water meter sensor under the condition of the same electric quantity support. The iron-nickel alloy is subjected to a vacuum heat treatment process, wherein the vacuum heat treatment is carried out under the protection of inert gas, the heat treatment temperature is 650-800 ℃, the heat preservation time is 6-8 hours, and the heat treatment furnace is a continuous heat treatment furnace.
As shown in fig. 8, the casing 1 is made of stainless steel, the casing 1 includes a side plate section and a plate-wrapping section 22, the side plate end is divided into an upstream side plate ring 21 and a downstream side plate ring, the upstream side plate ring 21 is sleeved outside the upstream cylindrical section 3 and the first horn section 6, one end of the upstream side plate ring 21 is fixedly welded to the upstream connecting flange 20, and the other end of the upstream side plate ring 21 is fixedly welded to one end of the plate-wrapping section 22; the downstream side plate ring is sleeved outside the downstream cylindrical section 4 and the second horn section 7 in a penetrating mode, one end of the downstream side plate ring is fixedly welded with the other end of the plate wrapping section 22, the other end of the downstream side plate ring is fixedly welded with the downstream connecting flange, and the inner side of the plate wrapping section 22 is provided with a magnetic shielding layer 23. And a connecting seat 17 is arranged on the outer side of the wrapper sheet section 22, a hole of the magnetic yoke 11 is arranged on the position of the magnetic yoke 11 opposite to the connecting seat 17, and electrode wires of the reference electrode 15 and the measuring electrode 16 penetrate through the hole of the magnetic yoke 11 and are led out along the outer wall of the magnetic yoke 11 to be electrically connected with the connecting seat 17. The wrapper sheet section 22 is sleeved on the periphery of the magnetic yoke 11 in a penetrating way, and the magnetic shielding layer 23 on the inner side of the wrapper sheet forms a magnetic shielding ring to block the internal and external magnetic fields of the shell 1 and prevent the internal and external magnetic fields of the shell 1 from causing mutual interference.
According to the self-rectifying low-power-consumption electromagnetic water meter sensor, the pressure taking channel is communicated with the inside of the flow tube through the pressure taking hole of the downstream connecting flange to take pressure, so that the phenomenon that the pipeline is rotten due to the fact that an insulating layer is damaged by punching on the flow tube is avoided. The rectangular section 5 of the rectifying flow tube 2 is designed to enlarge the installation area of the exciting coil 13 and the magnetic pole plate 14, and simultaneously, the distance between two poles of the magnetic pole plate 14 is shortened, so that the magnetic fields between the two poles of the magnetic pole plate 14 tend to be the same. The reinforcing effect of the polygonal rhombic magnet yoke 11 structure on the magnetic field intensity is better than that of the circular magnet yoke 11, and the effect of low current and high magnetic field is further realized.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although the terms flow tube, yoke, pressure tapping channel, reference electrode, measurement electrode, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (9)
1. A self-rectifying low-power-consumption electromagnetic water meter sensor is characterized by comprising a shell, a self-rectifying flow tube and a pressure sensing unit, wherein the self-rectifying flow tube and the pressure sensing unit are arranged in the shell, the rectifying flow tube comprises an upstream cylindrical section, a downstream cylindrical section and a rectangular section, the upstream cylindrical section and the downstream cylindrical section are sequentially connected end to end, the rectangular section is arranged between one end of the upstream cylindrical section and one end of the downstream cylindrical section, a first rectangle of the radial section of the rectangular section is a quadrangle of which four corners are round chamfers, and a first horn section gradually indented from a circle to the first rectangle is arranged between one end of the upstream cylindrical section and the rectangular section; a second horn section which is gradually enlarged from a first rectangle to a circle is arranged between the rectangular section and one end of the downstream cylindrical section;
two measuring electrodes are oppositely arranged on two short sides of the rectangular section, magnetic circuit units are arranged on two opposite long sides of the rectangular section, and the direction of magnetic force lines generated by the magnetic circuit units in the rectifying flow pipe is perpendicular to the direction of the electrodes of the measuring electrodes;
the other end port department of the downstream cylinder section of the rectification flow tube is provided with a downstream connecting flange, a pressure taking hole is further processed on the downstream connecting flange, the pressure taking hole penetrates through the downstream connecting flange along the thickness direction of the flange, and the pressure taking hole is communicated with a pressure taking channel of the pressure sensing unit.
2. The self-rectifying low-power consumption electromagnetic water meter sensor according to claim 1, wherein the straight hole pressure tapping channel is arranged perpendicular to an axial centerline of the rectifying flow tube, one end of the inclined hole pressure tapping channel is connected with one end of the straight hole pressure tapping channel, the other end of the inclined hole pressure tapping channel is connected with a pressure tapping hole of the downstream connecting flange, and an included angle is formed between the axial centerline of the inclined hole pressure tapping channel and the axial centerline of the straight hole pressure tapping channel.
3. The self-rectifying low-power consumption electromagnetic water meter sensor according to claim 2, wherein the pressure sensing unit further comprises a ball valve, the ball valve is connected with a connecting flange at the other end of the straight hole pressure tapping channel through a ball valve connecting seat arranged at the lower end of the ball valve, and a pressure sensor is arranged above the ball valve.
4. A self-rectifying low-power consumption electromagnetic water meter sensor according to claim 2 or 3, wherein said magnetic circuit unit comprises a polygonal diamond-shaped magnetic yoke, a magnetic core is arranged on each of two opposite sides of said magnetic yoke, one end of said magnetic core is connected with the inner surface of said magnetic yoke, the other end of said magnetic core is connected with a magnetic pole plate, said magnetic core is circumferentially wound with an excitation coil, and the other magnetic pole plate is oppositely arranged on the outer surface of the long side of the rectangular section of said rectifying flow tube.
5. The self-rectifying low-power consumption electromagnetic water meter sensor according to claim 4, wherein the long side surface of the rectangular section of the rectifying flow tube is provided with a magnetic plate limiting groove and a wiring groove for mounting a magnetic circuit unit, the rectifying transition surface in the magnetic field direction of the second horn section is provided with a reference electrode mounting hole, and a reference electrode is mounted in the reference electrode mounting hole.
6. The self-rectifying low-power consumption electromagnetic water meter sensor according to claim 5, wherein an upstream connecting flange is arranged at the other end of the upstream cylindrical end, the housing comprises a side plate section and a wrapper plate section, the side plate end is divided into an upstream side plate ring and a downstream side plate ring, the upstream side plate ring is sleeved outside the upstream cylindrical section and the first horn section in a penetrating manner, one end of the upstream side plate ring is fixedly welded with the upstream connecting flange, and the other end of the upstream side plate ring is fixedly welded with one end of the wrapper plate section; the downstream side plate ring is sleeved on the outer sides of the downstream cylindrical section and the second horn section in a penetrating mode, one end of the downstream side plate ring is fixedly welded with the other end of the plate wrapping section, the other end of the downstream side plate ring is fixedly welded with the downstream flange, and a magnetic shielding layer is arranged on the inner side of the plate wrapping section.
7. A self-rectifying low-power consumption electromagnetic water meter sensor according to claim 6, characterized in that a connecting seat is provided outside the wrapper sheet section, and electrode wire leads of the reference electrode and the measuring electrode are electrically connected with the connecting seat.
8. A self-rectifying low-power consumption electromagnetic water meter sensor according to claim 7, wherein said upstream and downstream attachment flanges are grounded.
9. The self-rectifying low-power consumption electromagnetic water meter sensor according to claim 8, wherein the magnetic pole plate, the magnetic core and the magnetic yoke are made of 1J50 iron-nickel alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210279526.2A CN114577282A (en) | 2022-03-21 | 2022-03-21 | Self-rectifying low-power-consumption electromagnetic water meter sensor |
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| CN209727178U (en) * | 2019-06-18 | 2019-12-03 | 浙江天信仪表科技有限公司 | A kind of undergauge type electromagnetism water meter |
| CN111024167A (en) * | 2019-12-20 | 2020-04-17 | 宁波东海集团有限公司 | Electromagnetic flow measuring device |
| CN210533420U (en) * | 2019-06-18 | 2020-05-15 | 浙江天信仪表科技有限公司 | Electromagnetic water meter with pressure taking function |
| CN114088147A (en) * | 2021-11-05 | 2022-02-25 | 浙江浙能技术研究院有限公司 | Double-perforated-plate balance type flowmeter |
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| CN87217220U (en) * | 1987-12-30 | 1988-09-21 | 四川石油管理局输气管理处 | Divided flange draw pressure throttling device |
| US5670724A (en) * | 1996-05-01 | 1997-09-23 | Amj Equipment Corporation | Apparatus for sensing liquid flow and pressure in a conduit and associated methods |
| CN101738229A (en) * | 2008-11-17 | 2010-06-16 | 克洛纳有限公司 | Electromagnetic flowmeter |
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| CN114088147A (en) * | 2021-11-05 | 2022-02-25 | 浙江浙能技术研究院有限公司 | Double-perforated-plate balance type flowmeter |
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Application publication date: 20220603 |