Electromagnetic water meter excitation structure
By designing an inverted V-shaped magnetic yoke and pole shoes, the problems of consistency and measurement repeatability in the excitation system of electromagnetic water meters were solved, achieving higher process consistency and measurement accuracy, simplifying the production process, and reducing costs.
Patent Information
- Application Number
- CN202520198447.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-08
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-02-08
AI Technical Summary
Existing electromagnetic water meters suffer from problems such as poor consistency, zero-point drift, and poor measurement repeatability in their excitation systems.
The pole shoes and magnetic yoke are made of inverted V-shaped magnetic yoke and stamped from soft magnetic material, which achieves a tight fit between the pole shoes and the conduit, and between the magnetic yoke and the pole shoes, eliminating air gaps and forming a stable magnetic field path.
It improves the consistency of instrument processes and measurement repeatability, simplifies production processes, reduces costs, and enhances production efficiency and instrument performance.
Smart Images
Figure CN223678557U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of electromagnetic water meter accessories, more specifically, the utility model relates to an electromagnetic water meter excitation structure. BACKGROUND
[0002] The existing electromagnetic water meter is mainly composed of a measuring sensor and a flow converter. The measuring sensor comprises a flow measuring pipe, a flow guide system and an excitation system, the excitation system is mainly composed of a coil, a pole shoe and a magnetic yoke, the coil generates a magnetic field through the magnetic effect of electric current, and the strength of the magnetic field directly affects the signal size generated by the cutting of the magnetic force lines of the conductive liquid, therefore, in order to enhance the magnetic field strength, the electromagnetic flow meter manufacturers adopt the method of shielding external magnetic interference by forming a magnetic yoke through the peripheral wrapping of the silicon steel cover of the iron core and the coil, this kind of structure makes the batch production of the electromagnetic flow meter operable, but introduces the interference that cannot be solved in the process, such as the consistency of the excitation system, zero drift and poor measurement repeatability.
[0003] Therefore, the utility model provides an electromagnetic water meter excitation structure. UTILITY MODEL CONTENTS
[0004] In order to overcome the problems in the prior art, the utility model provides an electromagnetic water meter excitation structure, which solves the problems of the consistency of the excitation system, zero drift and poor measurement repeatability of the existing excitation system.
[0005] According to one aspect of the utility model, an electromagnetic water meter excitation structure is provided, which comprises pole shoes, a magnetic yoke and a coil that are symmetrically installed on the outer circular surface of the guide pipe;
[0006] The pole shoe is a semicircular arc structure, and the inner diameter of the pole shoe circular arc is matched with the outer diameter of the guide pipe.
[0007] The magnetic yoke is a reverse U-shaped structure, and the magnetic yoke comprises a protrusion arranged at the middle position and vertical slot edges on both sides of the protrusion, the surface of the protrusion is matched with the surface of the pole shoe, bolt connection holes are arranged on the vertical slot edges, a semicircular electrode avoiding slot is arranged in the middle part of the bolt connection hole, and the gap between the protrusion and the bolt connection hole is filled with a coil.
[0008] As a preferred technical scheme of the utility model, the stud position welded with the guide pipe is matched with the hole position in the middle of the pole shoe, and the pole shoe is installed in close contact with the outer wall of the guide pipe.
[0009] As a preferred technical scheme of the utility model, the magnetic yokes symmetrically arranged upward and downward are connected and fixed to the upper position of the pole shoe through the studs and the nuts, the coil is arranged outside the protrusion, the two wings outside the magnetic yoke are butted, and the coil is compressed.
[0010] As a preferred technical scheme of the utility model, the two half-circle electrode avoidance grooves which are butted between the upper and lower symmetrical magnetic yokes form the electrode line outlet hole.
[0011] As a preferred technical scheme of the utility model, the pole shoe and the magnetic yoke are both integral structure metal stamping cores.
[0012] The technical effect and advantages of the electromagnetic water meter excitation structure of the utility model are as follows:
[0013] The utility model discloses a inverted U-shaped magnetic yoke and the pole shoe and the magnetic yoke of soft magnetic material stamping forming realize the close adhesion of pole shoe and guide pipe, magnetic yoke and pole shoe, eliminate the air gap, fully guarantee the magnetic field passage, thereby possess excellent process consistency, greatly improve the measurement repeatability of instrument. Its design is favorable to the modular production of product, improves production efficiency. Meanwhile, a magnetic yoke workpiece can replace traditional iron core and magnetic yoke, simplifies the structure, and the processing technology is simple, and the operability is strong, and the cost is low, and the stamping part product consistency is strong, effectively solve the consistency of the existing excitation system, zero drift, measurement repeatability is poor and other problems, make instrument performance improve significantly. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is the structure schematic view of the excitation structure in the utility model embodiment;
[0015] Figure 2 It is the explosion drawing of the excitation structure in the utility model embodiment;
[0016] Figure 3 It is the structure schematic view of the pole shoe in the utility model embodiment;
[0017] Figure 4 It is the structure schematic view of the magnetic yoke in the utility model embodiment.
[0018] Fig. 1, guide pipe;2, upper pole shoe;3, lower pole shoe;4, upper magnetic yoke;5, lower magnetic yoke;6, coil;7, bolt connection hole;8, protrusion;9, electrode avoidance groove. DETAILED DESCRIPTION
[0019] The technical scheme in the utility model embodiment will be clearly and completely described below in conjunction with the drawings in the utility model embodiment, and obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.
[0020] Embodiment 1
[0021] Please refer to Figures 1-4As shown, the excitation structure of the electromagnetic water meter comprises an upper pole shoe 2, a lower pole shoe 3, an upper magnetic yoke 4, a lower magnetic yoke 5 and two coils 6 fixed on a conduit 1, the upper pole shoe 2 and the lower pole shoe 3 are identical in shape and symmetrically arranged, the upper magnetic yoke 4 and the lower magnetic yoke 5 are identical in shape and symmetrically arranged;
[0022] The upper pole shoe 2 is in a semicircular arc structure and is tightly arranged on the outer circular surface of the conduit 1, the inner diameter of the circular arc of the upper pole shoe 2 is matched with the outer diameter of the conduit 1, the upper magnetic yoke 4 is in an inverted U-shaped structure, and the surface of the protrusion 8 arranged in the middle of the upper magnetic yoke 4 downward is matched with the surface of the upper pole shoe 2;
[0023] The two sides of the upper magnetic yoke 4 are respectively provided with bolt connecting holes 7, and the middle portions of the bolt connecting holes 7 on the two sides of the upper magnetic yoke 4 are provided with semicircular electrode avoiding grooves 9;
[0024] The gap between the downward protrusion 8 of the upper magnetic yoke 4 and the bolt connecting holes 7 on the two sides is arranged with one coil 6, the surface of the protrusion 8 arranged in the middle of the upper magnetic yoke 4 downward is fixedly connected with the surface of the upper pole shoe 2 through a screw column, the gap between the upward protrusion 8 of the lower magnetic yoke 5 and the bolt connecting holes 7 on the two sides is arranged with another coil 6, the surface of the protrusion 8 arranged in the middle of the lower magnetic yoke 5 upward is fixedly connected with the surface of the lower pole shoe 3 through a screw column, the upper magnetic yoke 4 and the lower magnetic yoke 5 are fixedly connected through a screw column and a nut, and the upper magnetic yoke 4 and the lower magnetic yoke 5 are in butt joint in the upper and lower directions to form an electrode wire outlet hole through the two semicircular electrode avoiding grooves 9.
[0025] The upper pole shoe 2, the lower pole shoe 3, the upper magnetic yoke 4 and the lower magnetic yoke 5 are all in an integral metal stamping core structure.
[0026] By adopting the above technical scheme, the working process of the utility model is as follows:
[0027] The bolt position welded on the conduit 1 matches the hole position in the middle of the upper pole shoe 2 and the lower pole shoe 3, the inner diameter of the circular arc of the upper pole shoe 2 and the lower pole shoe 3 is consistent with the outer diameter of the conduit 1, and the upper pole shoe 2 and the lower pole shoe 3 are installed in close contact with the outer wall of the conduit 1; the middle protrusion 8 of the upper magnetic yoke 4 and the lower magnetic yoke 5 acts as an iron core and plays a role in strengthening the magnetic field of the electromagnetic water meter; the middle protrusion 8 of the magnetic yoke 4 and 5 is fastened to the upper position of the pole shoe 2 and 3 through a bolt and a nut, the coil 6 is arranged outside the protrusion 8, the two wings on the outside of the upper magnetic yoke 4 and the lower magnetic yoke 5 are butted, and the coil 6 is pressed tightly; the inverted U-shaped magnetic yoke 4 and 5 are stamped and formed by using a soft magnetic material, the middle protrusion 8 in the middle of the magnetic yoke 4 and 6 is in close contact with the outer wall of the pole shoe 2 and 3, a vertical magnetic field inside the pipeline is provided, the protrusion is arranged in the coil 6, the two wings of the magnetic yoke 4 and 5 are bent downward to form a semicircle, the protrusion 8 part and the pole shoe 2 and 3 are fixed to the outer wall of the conduit 1 through a nut, the structural reliability is ensured, after one side assembly is completed, the opposite coil 6 is assembled, the threaded connection hole 7 is aligned, the bolt and the nut are pulled tightly, the coil 6 is pressed tightly at the bent part of the protrusion 6 of the magnetic yoke, the middle of the bolt connection hole 7 of the two sides of the magnetic yoke 4 and 5 is provided with a semicircular electrode avoiding groove 9, the upper magnetic yoke 4 and the lower magnetic yoke 5 form an electrode wire outlet hole after complete assembly, and the electrode wire outlet hole is convenient for the electrode wire to outlet; in this way, the protrusion 8 part in the inside of the coil 6 plays a role of an iron core, the butting part of the two wing bolt connection holes 7 plays a role of a magnetic yoke, and the external magnetic circuit is conducted and the external magnetic field is shielded; when the upper magnetic yoke 4 and the lower magnetic yoke 5 are assembled, the two semicircular electrode avoiding grooves 9 are concentric or have a sufficient distance outside, so that the electrode wire is not contacted with the magnetic yoke 4 and 5 after the electrode wire is installed.
[0028] In conclusion, the utility model provides a novel excitation structure of an electromagnetic water meter, adopts inverted U-shaped magnetic yoke 4 and 5 structure design, the pole shoe 2 and 3 are stamped and formed by using a soft magnetic material, and the inner circular arc surface of the pole shoe 2 and 3 is in close contact with the outer wall of the conduit 1; the magnetic yoke 4 and 5 are stamped and formed by using a soft magnetic material, the inner circular arc surface of the magnetic yoke 4 and 5 is in close contact with the pole shoe 2 and 3 to eliminate air gap, can fully ensure the magnetic field passage, the design has excellent process consistency, can greatly improve the measurement repeatability of the instrument, is favorable for the modular production of products, greatly improves the production efficiency of products, one magnetic yoke workpiece can simultaneously replace the traditional iron core and magnetic yoke, the processing technology is simple, the operability is strong, the cost is low, the stamping part product consistency is strong, finally can make the instrument have excellent measurement repeatability, and the consistency, zero drift and poor measurement repeatability of the existing excitation system are solved.
[0029] It should be noted that the coil 6 used in the utility model is a conventional technology, and the specific structure will not be described in detail.
[0030] The above merely describes specific implementation manners of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be included in the protection scope of the present application.
[0031] Finally, the above merely describes preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims
1. An electromagnetic water meter excitation structure, characterized by, The pole shoe, the yoke and the coil are symmetrically arranged on the outer surface of the catheter (1); The pole shoe is a semicircular arc structure, and the inner diameter of the pole shoe is matched with the outer diameter of the catheter (1); The yoke is a reverse U-shaped structure, and the yoke comprises a protrusion (8) arranged at the middle position and vertical slot sides on both sides of the protrusion (8), the surface of the protrusion (8) is matched with the surface of the pole shoe, bolt connection holes (7) are arranged on the vertical slot sides, a semicircular electrode avoiding slot (9) is arranged in the middle of the bolt connection hole, and a coil (6) is arranged in the gap between the protrusion (8) and the bolt connection hole (7).
2. The electromagnetic water meter excitation structure according to claim 1, characterized in that The bolt position of the catheter (1) is matched with the hole position in the middle of the pole shoe, and the pole shoe is arranged close to the outer wall of the catheter.
3. The electromagnetic water meter excitation structure according to claim 1, characterized in that, The upper and lower symmetrically arranged yokes are connected and fixed to the upper position of the pole shoe through bolts and nuts, the coil is arranged outside the protrusion (8), the two wings outside the yoke are butted, and the coil is pressed.
4. The electromagnetic water meter excitation structure of claim 1, wherein, The two semicircular electrode avoiding slots butted between the upper and lower symmetrically arranged yokes form an electrode wire outlet hole.
5. The electromagnetic water meter excitation structure of claim 1, wherein, The pole shoe and the yoke are metal stamping cores in an integrated structure.