CN211954283U - Electromagnetic flow measuring device - Google Patents
Electromagnetic flow measuring device Download PDFInfo
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- CN211954283U CN211954283U CN201922320288.1U CN201922320288U CN211954283U CN 211954283 U CN211954283 U CN 211954283U CN 201922320288 U CN201922320288 U CN 201922320288U CN 211954283 U CN211954283 U CN 211954283U
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- 239000007788 liquid Substances 0.000 claims abstract description 27
- 230000005284 excitation Effects 0.000 claims abstract description 15
- 230000008878 coupling Effects 0.000 claims abstract 3
- 238000010168 coupling process Methods 0.000 claims abstract 3
- 238000005859 coupling reaction Methods 0.000 claims abstract 3
- 238000005259 measurement Methods 0.000 claims description 23
- 230000007704 transition Effects 0.000 claims description 13
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000002262 irrigation Effects 0.000 description 2
- 238000003973 irrigation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
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Abstract
The utility model relates to an electromagnetic flow measuring device, including hollow measuring section, set up respectively at measuring section both ends and be used for with the runner accordant connection's of conducting liquid medium linkage segment, transitional coupling between linkage segment and measuring section, set up two excitation coils on the measuring section outer wall relatively, set up magnetic core in every excitation coil, inlay two electrodes of establishing in the measuring section relatively, it is provided with the passageway that supplies the conducting liquid medium to flow to run through in measuring section, transitional coupling and the linkage segment, measuring section internal diameter on the horizontal direction is the same with the internal diameter of linkage segment, measuring section internal diameter on vertical direction is less than the internal diameter of linkage segment, and two excitation coils set up relatively in vertical direction, and two electrodes set up relatively in the horizontal direction. The electromagnetic flow measuring device has good connectability, can enhance the range ratio and the initial flow, and can reduce the power consumption, have high measuring accuracy and high small flow sensitivity.
Description
Technical Field
The utility model relates to a flow measurement technical field, the utility model particularly relates to an electromagnetic flow measurement device.
Background
The electromagnetic flowmeter is a flow meter utilizing Faraday's law of electromagnetic induction as principle, and is a speed type flow meter for measuring volume flow of conductive liquid. The inner cavity part of the measuring tube, which is contacted with the liquid medium, of the electromagnetic flowmeter is a cylindrical measuring straight tube. A group of excitation coils are symmetrically arranged on the measuring tube from top to bottom, a pair of measuring electrodes which are horizontally arranged are inlaid in the middle, and the two are symmetrically distributed in a cross shape. The amplitude of the electrode signal generated by the electromagnetic flowmeter is in direct proportion to the flow velocity of the fluid, so that the flow data is obtained after the electrode signal is processed by the circuit signal converter. The measuring tube has the advantages of no movable parts and no abrasion devices inside the measuring tube. The method is widely applied to the fields of metering, statistics, analysis and settlement of urban pipe networks, industrial sewage and agricultural irrigation. Electromagnetic flowmeter surveys buret mostly is circular survey buret on the market, if grant publication number CN209181846U (application number is 201920107065.4) Chinese utility model patent "a farmland irrigation type electromagnetic flowmeter", and grant publication number CN209069356U (application number is 201822192038.X) Chinese utility model patent "an electromagnetic flowmeter", the electromagnetic flowmeter who discloses in these patents, it surveys buret and is circular shape survey buret, electromagnetic flowmeter's initiative flow is not low enough in the in-service use, make electromagnetic flowmeter have the range than not wide enough problem, also there is the not high problem enough to liquid medium volume accuracy simultaneously.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that it is good to provide a connectability to above-mentioned prior art, can strengthen range ratio and pick up flow to can reduce the consumption, measure the high and high electromagnetism flow measuring device of little flow sensitivity of accuracy.
The utility model provides a technical scheme that above-mentioned problem adopted does: the utility model provides an electromagnetic flow measuring device, is including the main part that has the passageway that link up, the main part includes the measurement section, sets up respectively at the measurement section both ends and be used for with the runner accordant connection's of conductive liquid medium linkage segment, changeover portion between linkage segment and measurement section, is provided with the magnetic core in two relative excitation coils, every excitation coil on the measurement section outer wall, measures the embedded two relative electrodes that are equipped with of section, its characterized in that: the inner diameter of the measuring section in the horizontal direction is the same as that of the connecting section, the inner diameter of the measuring section in the vertical direction is smaller than that of the connecting section, the two excitation coils are arranged oppositely in the vertical direction, and the two electrodes are arranged oppositely in the horizontal direction.
In order to guarantee the stationarity that the electrically conductive liquid medium flows to improve the accuracy of testing result, the measuring section includes longitudinal symmetry and transversal curved arc portion of personally submitting to and connect between two arc portion both sides and be planar plane portion, the measuring section includes longitudinal symmetry and transversal curved arc portion of personally submitting, and connects between two arc portion both sides and be planar plane portion, the plane portion and the changeover portion of changeover portion, the inner wall level of linkage segment of measuring section meet.
Preferably, the electrode is embedded on the horizontal middle line of each plane part, an excitation coil is arranged on the outer side surface of each arc surface part, the magnetic core is arranged at the center of the excitation coil, and the two excitation coils and the magnetic core are respectively and correspondingly arranged.
In order to facilitate connection, the end part of the connecting section is sleeved with a flange.
In order to avoid influence on the detection result of the electrode, the inner wall of the channel and the connecting end face of the flange are coated with insulating layers made of wear-resistant and corrosion-resistant insulating materials.
In order to isolate interference signals of an external magnetic field, a shell connected between the flanges is sleeved outside the measuring section, and the exciting coil is positioned in the shell.
In order to conveniently realize the control and processing of signals, the shell is provided with a mounting box in a radially outward extending mode, a control circuit board is arranged in the mounting box, and the control circuit board is electrically connected with the exciting coil and the electrode respectively.
In order to display the measurement result in real time, a display screen electrically connected with the control circuit board is further arranged on the mounting box.
In order to fix the exciting coil and the magnetic core conveniently, the exciting coil and the magnetic core are fixed on the outer wall of the measuring section through an outer magnetic sheet, the outer magnetic sheet is wrapped outside the exciting coil and the magnetic core, a gap is formed between the outer wall of the measuring section and the outer magnetic sheet, the exciting coil and the magnetic core are clamped in the gap, and openings are formed in the positions, corresponding to the electrodes, of the outer magnetic sheet.
In order to further ensure the flowing stability of the conductive liquid medium and avoid the influence of fluctuation generated in the flowing process of the conductive liquid medium on the accuracy of the measuring result, the transition section is smoothly connected between the measuring section and the connecting end in a transition mode, and the measuring section, the transition section and the connecting section are integrally connected.
Compared with the prior art, the utility model has the advantages of: the utility model provides an electromagnetic flow measuring device because the internal diameter of measuring section non-uniform diameter sets up the mode, from the angle of velocity of flow for measure the section and improve the velocity of flow of conductive liquid medium on can guaranteeing that conductive liquid medium flows the basis that the bore is suitable, survey buret for the same bore circle runner of uniform diameter, the voltage signal that electrode detection acquireed has obvious improvement. From the perspective of a magnetic field, the relative distance between the two oppositely arranged excitation coils is shortened, so that the magnetic field in the measuring section with unequal diameter is enhanced, and further, the voltage signal obtained by electrode detection is obviously enhanced relative to the voltage signal obtained by the electrode on the measuring tube with the same diameter and the same diameter. Consequently under the condition of little flow, the utility model provides an electromagnetic flow measuring device can obtain much less stable signal, has strengthened this electromagnetic flow measuring device's range ratio and initial flow. From the perspective of exciting current power consumption, under the condition that the induced voltage obtained by the electromagnetic flow measuring device with the equal-diameter circular pipeline measuring pipe is equal, the correspondingly adopted exciting current is lower, and the power consumption of the electromagnetic flow measuring device is further reduced. And electrically conductive liquid medium is in the utility model provides an electromagnetic flow measuring device non-circular flow field in the measurement section is more even, and magnetic field distribution is also more even. The utility model provides an electromagnetic flow measuring device has characteristics such as simple structure, measurement accuracy, super high range ratio, little flow sensitivity height, low-power consumption, and the measurement is reliable and stable for a long time.
Drawings
Fig. 1 is a perspective view of an electromagnetic flow measuring device according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view of the electromagnetic flow measuring device in the embodiment of the present invention.
Fig. 3 is a perspective view of the main body in the embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 1 to 3, the electromagnetic flow measuring device in this embodiment includes a main body 1 having a through channel, where the main body 1 includes a measuring section 11, a connecting section 12 for matching and connecting with a flow channel of a conductive liquid medium, and a transition section 13 transitionally connected between the connecting section 12 and the measuring section 11, two opposite exciting coils 2 are disposed on an outer wall of the measuring section 11, a magnetic core 3 is disposed in each exciting coil 2, and two opposite electrodes 4 are embedded in the measuring section 11.
Wherein linkage segment 12 is circular shape tubular structure for the cross-section, and the tip overcoat of linkage segment 12 is established and is connected with flange 5, specifically can carry out fixed connection through the welded mode, and linkage segment 12 passes through flange 5 to be connected on the runner of awaiting measuring, because this linkage segment 12 cross-section is circular, has guaranteed that electrically conductive liquid medium can be steady in flowing into measuring section 11 in the runner. The connecting section 12 at one end of the measuring section 11 serves as an inflow section for the electrically conductive liquid medium, and the connecting section 12 at the other end of the measuring section 11 serves as an outflow section for the electrically conductive liquid medium.
In the embodiment, the transition section 13 is smoothly connected between the measuring section 11 and the connecting end in a transition manner, the measuring section 11, the transition section 13 and the connecting section 12 are integrally connected, and the measuring section 11, the transition section 13 and the connecting section 12 are connected in a through manner to form a channel for flowing the conductive liquid medium. In order to avoid influencing the detection result of the electrode 4, the inner wall of the channel and the connecting end face of the flange 5 are coated with an insulating layer 6 made of wear-resistant and corrosion-resistant insulating material.
The measurement section 11 in this embodiment includes the cambered surfaces 111 that are symmetrical from top to bottom and have an arc-shaped cross section, and the planar portions 112 that are connected between two sides of the cambered surfaces 111, the measurement section 11 includes the cambered surfaces 111 that are symmetrical from top to bottom and have an arc-shaped cross section, and the planar portions 112 that are connected between two sides of the cambered surfaces 111 and are planar, and the planar portions 112 of the measurement section 11 are horizontally connected with the inner walls of the transition section 13 and the connection section 12. So that the distance between the two flat surface portions 112 is equal to the inner diameter of the connecting section 12, and the maximum distance in the vertical direction between the two arc surface portions 111 is smaller than the inner diameter of the connecting section 12. The distance between the two plane portions 112 ensures the inflow aperture of the conductive liquid medium entering the measuring section 11, and the distance between the two arc surface portions 111 can accelerate the flow rate of the conductive liquid medium entering the measuring section 11, and can reduce the distance between the two exciting coils 2 described below, thereby enhancing the magnetic field. Therefore, the stability of the conductive liquid medium entering the measuring section 11 can be ensured on the basis that the flow rate of the measuring section 11 with the shape can be improved, the influence of unstable factors on the measuring result caused by the excessive change of the cross section shape of the measuring section 11 relative to the connecting section 12 of the conductive liquid medium is avoided, and the accuracy of the measuring result can be improved.
An electrode 4 is embedded on the horizontal middle line of each plane part 112, namely, a small hole is arranged on the plane part 112, the electrode 4 is embedded in the small hole in a sealing way, and the front end of the electrode 4 extends into the inside of the measuring section 11 to be contacted with the conductive liquid medium flowing through the electrode. The electrode 4 is arranged on the plane, so that the sealing performance of the electrode 4 can be ensured, and the working pressure of the liquid medium in the measuring section 11 can be correspondingly and better ensured.
An exciting coil 2 and a magnetic core 3 are arranged on the outer side surface of each arc surface part 111, and the two exciting coils 2 and the magnetic cores 3 are correspondingly and oppositely arranged respectively. The whole exciting coil 2 in this embodiment is annular, the exciting coil 2 is arranged on the outer wall of the measuring section 11 through the outer magnetic sheet 8, and the magnetic core 3 is arranged at the center of the exciting coil 2 and is connected with the exciting coil 2 into a whole, so that the whole exciting coil 2 and the magnetic core 3 are in a cake shape. The outer magnetic sheet 8 is wrapped outside the exciting coil 2 and the magnetic core 3, a gap is formed between the outer wall of the measuring section 11 and the outer magnetic sheet 8, the exciting coil 2 and the magnetic core 3 are clamped in the gap, and openings are formed in the positions, corresponding to the electrodes 4, of the outer magnetic sheet 8. Outer magnet piece 8 in this embodiment includes two arc that can involution each other, and the arc adopts magnetic conduction silicon steel sheet, and then concentrates involution from the both sides of measuring section 11 to utilize the nut to fix, and then form the outer magnet piece 8 of a complete annular, and then guarantee to exciting coil 2 and magnetic core 3 the fastness fixed between outer magnet piece 8 and measuring section 11, avoid exciting coil 2 to take place to slide and make two exciting coil 2 take place to misplace. The outer magnetic sheet 8 can be matched with the exciting coil 2 and the magnetic core 3, so that a complete magnetic loop is formed in the measuring section 11.
The measuring section 11 is also externally sleeved with a shell 7 connected between the two flanges 5, and the shell 7 can be made of metal materials so as to isolate interference signals of an external magnetic field.
In order to realize the control and processing of signals conveniently, the housing 7 is provided with a mounting box 71 extending radially outwards, that is, the space in the mounting box 71 is communicated with the space of the housing 7, and a control circuit board is arranged in the mounting box 71 and is respectively electrically connected with the exciting coil 2 and the electrode 4. The mounting box 71 is further provided with a display screen electrically connected with the control circuit board so as to conveniently display the measurement result in real time. The control circuit board is provided with a signal amplifying circuit electrically connected with the electrode 4, a signal conversion circuit electrically connected with the signal amplifying circuit and a controller electrically connected with the signal conversion circuit, so that the controller can calculate the induced voltage signal acquired by the electrode 4 conveniently. The display screen is electrically connected with the controller, and then the measurement result is displayed according to the display result of the controller. The exciting coil 2 can be electrically connected with the controller through the current regulating circuit, and then the current regulating circuit is controlled to output corresponding current to the exciting coil 2 under the control of the controller.
The utility model provides an electromagnetic flow measuring device, because the internal diameter of measuring section 11 non-uniform diameters sets up the mode, from the angle of velocity of flow for measuring section 11 improves the velocity of flow of conductive liquid medium on the basis that can guarantee conductive liquid medium flow bore, surveys buret for equal diameter with the aperture circle runner, and electrode 4 detects the voltage signal who acquires and has obvious improvement. From the perspective of magnetic field, the relative distance between the two oppositely arranged excitation coils 2 is shortened, so that the magnetic field in the non-equal-diameter measuring section 11 is enhanced, and further, the voltage signal detected and obtained by the electrode 4 is obviously enhanced relative to the voltage signal obtained by the electrode 4 on the equal-diameter circular flow channel measuring tube. Consequently under the condition of little flow, the utility model provides an electromagnetic flow measuring device can obtain much less stable signal, has strengthened this electromagnetic flow measuring device's range ratio and initial flow. From the perspective of exciting current power consumption, under the condition that the induced voltage obtained by the electromagnetic flow measuring device with the equal-diameter circular pipeline measuring pipe is equal, the correspondingly adopted exciting current is lower, and the power consumption of the electromagnetic flow measuring device is further reduced. And electrically conductive liquid medium is in the utility model provides an electromagnetic flow measuring device non-circular measuring section 11 in the flow field more even, magnetic field distribution is also more even. The utility model provides an electromagnetic flow measuring device has characteristics such as simple structure, measurement accuracy, super high range ratio, little flow sensitivity height, low-power consumption, and the measurement is reliable and stable for a long time.
Claims (10)
1. The utility model provides an electromagnetic flow measuring device, is including main part (1) that has the passageway that link up, main part (1) is including measuring section (11), set up respectively at measuring section (11) both ends and be used for with runner accordant connection's of conducting liquid medium linkage segment (12), changeover portion (13) of transitional coupling between linkage segment (12) and measuring section (11), be provided with two relative exciting coil (2) on measuring section (11) outer wall, be provided with magnetic core (3) in every exciting coil (2), it is equipped with two relative electrode (4) to measure section (11) embedded, its characterized in that: the inner diameter of the measuring section (11) in the horizontal direction is the same as that of the connecting section (12), the inner diameter of the measuring section (11) in the vertical direction is smaller than that of the connecting section (12), the two exciting coils (2) are arranged in the vertical direction relatively, and the two electrodes (4) are arranged in the horizontal direction relatively.
2. The electromagnetic flow measurement device of claim 1, wherein: the measuring section (11) comprises an arc-shaped arc surface part (111) which is symmetrical up and down and has an arc-shaped cross section, and a plane part (112) which is connected between two sides of the arc surface part (111) and is planar, wherein the plane part (112) of the measuring section (11) is horizontally connected with the inner walls of the transition section (13) and the connecting section (12).
3. The electromagnetic flow measurement device of claim 2, wherein: inlay on the horizontal midline of every plane portion (112) and establish one electrode (4), set up an excitation coil (2) on the lateral surface of every cambered surface portion (111), magnetic core (3) set up the center at excitation coil (2), two excitation coils (2), magnetic core (3) correspond respectively and set up relatively.
4. An electromagnetic flow measuring device according to any one of claims 1 to 3, characterized in that: the end part of the connecting section (12) is sleeved with a flange (5).
5. The electromagnetic flow measurement device of claim 4, wherein: and the inner wall of the channel and the connecting end surface of the flange (5) are coated with an insulating layer (6) by adopting a wear-resistant and corrosion-resistant insulating material.
6. The electromagnetic flow measurement device of claim 4, wherein: the measuring section (11) is also sleeved with a shell (7) connected between the flanges (5), and the exciting coil (2) is positioned in the shell (7).
7. The electromagnetic flow measurement device of claim 6, wherein: the outer shell (7) radially extends outwards to be provided with a mounting box (71), a control circuit board is arranged in the mounting box (71), and the control circuit board is electrically connected with the exciting coil (2) and the electrode (4) respectively.
8. The electromagnetic flow measurement device of claim 7, wherein: and a display screen electrically connected with the control circuit board is also arranged on the mounting box (71).
9. An electromagnetic flow measuring device according to any one of claims 1 to 3, characterized in that: exciting coil (2) and magnetic core (3) are fixed on the outer wall of measuring section (11) through outer magnetic sheet (8), outer magnetic sheet (8) parcel is outside exciting coil (2) and magnetic core (3), the outer wall of measuring section (11) and outer magnetic sheet (8) have the clearance between, exciting coil (2) and magnetic core (3) press from both sides and establish in the clearance, the position that corresponds to electrode (4) on outer magnetic sheet (8) all is provided with the opening.
10. An electromagnetic flow measuring device according to any one of claims 1 to 3, characterized in that: the transition section (13) is smoothly connected between the measuring section (11) and the connecting end in a transition manner, and the measuring section (11), the transition section (13) and the connecting section (12) are integrally connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922320288.1U CN211954283U (en) | 2019-12-20 | 2019-12-20 | Electromagnetic flow measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922320288.1U CN211954283U (en) | 2019-12-20 | 2019-12-20 | Electromagnetic flow measuring device |
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| CN211954283U true CN211954283U (en) | 2020-11-17 |
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| CN201922320288.1U Active CN211954283U (en) | 2019-12-20 | 2019-12-20 | Electromagnetic flow measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111024167A (en) * | 2019-12-20 | 2020-04-17 | 宁波东海集团有限公司 | An electromagnetic flow measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111024167A (en) * | 2019-12-20 | 2020-04-17 | 宁波东海集团有限公司 | An electromagnetic flow measuring device |
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Assignee: NINGBO DONGHAI INSTRUMENT WATERWAY Co.,Ltd. Assignor: NINGBO DONGHAI Group Corp. Contract record no.: X2021330000081 Denomination of utility model: An electromagnetic flow measuring device Granted publication date: 20201117 License type: Exclusive License Record date: 20210819 |