Laminated iron core structure and electromagnetic water meter

Abstract

The utility model relates to the technical field of electromagnetic water meters, and discloses a laminated iron core structure and an electromagnetic water meter, the laminated iron core structure comprises a plurality of arc-shaped sheets, each arc-shaped sheet is provided with a grounding electrode accommodating hole, and all the grounding electrode accommodating holes form a grounding electrode channel. The plurality of arc-shaped sheets are overlapped, so that the overall assembly of the laminated iron core structure can be realized; and then the assembled laminated iron core structure is placed in the mounting hole of the coil, the laminated iron core structure and the coil are attached to the outer wall of a guide pipe in the electromagnetic water meter together, and the grounding electrode channel is arranged so that the grounding electrode body can penetrate through the whole laminated iron core structure. The laminated iron core structure is simple in structure and convenient to assemble, manpower and material resources are saved, and the processing cost is effectively reduced; in addition, because the laminated iron core structure is formed by stacking the plurality of arc-shaped sheets, the situation that air holes are generated due to the fact that residues are doped in the iron core is avoided, and the magnetic saturation stability of the laminated iron core structure can also be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic water meters, and particularly relates to a laminated iron core structure and an electromagnetic water meter. Background Art

[0002] An electromagnetic water meter is a high-precision and high-stability water flow measuring instrument, and the working principle of the electromagnetic water meter is based on the electromagnetic induction principle. As one of the important components of the magnetic system of the electromagnetic water meter sensor, the iron core functions to concentrate the magnetic field inside the coil, thereby enhancing the magnetic field intensity. The magnetic permeability of the iron core is thousands of times higher than that of air. Therefore, it can effectively absorb and conduct the magnetic field, making the magnetic field lines denser and the magnetic field intensity more uniform, and strengthening the signal ratio efficiency of the electromagnetic water meter.

[0003] An electromagnetic water meter usually has a coil, and an iron core is arranged in the middle of the coil. The two are jointly installed on the outer wall of the pipeline inside the electromagnetic water meter to form an internal magnetic field of the electromagnetic water meter; in the prior art, in order to cooperate with the assembly relationship of the coil, the forming method of the iron core is usually wire cutting processing, powder metallurgy forming, and low-pressure casting forming; however, the processing costs of wire cutting processing and powder metallurgy forming are too high, while low-pressure casting forming will affect the magnetic saturation stability of the iron core.

[0004] Therefore, how to design an iron core for an electromagnetic water meter that saves costs and can obtain a stable magnetic field has become an urgent technical problem in this field. Summary of the Utility Model

[0005] The purpose of the utility model is to at least solve the technical problem of how to design an iron core for an electromagnetic water meter that saves costs and can obtain a stable magnetic field. This purpose is achieved through the following technical solutions:

[0006] In a first aspect, the utility model provides a laminated iron core structure applicable to an electromagnetic water meter. The laminated iron core structure includes a plurality of arc-shaped sheets stacked along a first direction. Each arc-shaped sheet is provided with a grounding electrode accommodating hole, and all the grounding electrode accommodating holes are arranged along the first direction and form a grounding electrode channel; the arc-shaped sheet has a first arc surface and a second arc surface corresponding to the first arc surface, and the second arc surface is configured to be able to fit with the outer wall of the conduit in the electromagnetic water meter, and the first arc surface of the arc-shaped sheet fits with the second arc surface of the adjacent arc-shaped sheet.

[0007] This laminated iron core structure stacks up multiple arc-shaped sheets in sequence along a first direction, ensuring that the first arc-shaped surface of the arc-shaped sheet and the second arc-shaped surface of the arc-shaped sheet adjacent to the arc-shaped sheet are tightly fitted, so as to realize the assembly of the laminated iron core structure as a whole; then the assembled laminated iron core structure is placed in the installation hole of the coil, and the laminated iron core structure and the coil are fitted together to the outer wall of the conduit in the electromagnetic water meter, so as to form a stable magnetic field generating mechanism in the electromagnetic water meter; it is easy to understand that the purpose of setting the grounding electrode channel is to enable the grounding electrode body inside the electromagnetic water meter to pass through the entire laminated iron core structure when assembling the electromagnetic water meter. Therefore, this laminated iron core structure has a simple structure and is easy to assemble. It does not require the participation of large equipment and complex operations, saves manpower and material resources, and effectively reduces processing costs; in addition, since the laminated iron core structure is formed by stacking multiple arc-shaped sheets, there will be no pores generated in the iron core due to doping residues, and the magnetic saturation stability of the laminated iron core structure can also be guaranteed.

[0008] In some embodiments of the present invention, each arc-shaped piece is provided with a first lead wire accommodating hole and a second lead wire accommodating hole arranged at intervals from the first lead wire accommodating hole; all the first lead wire accommodating holes are arranged along the first direction and constitute a first lead wire channel, and the first lead wire channel is used to pass through a group of lead wires inside the electromagnetic water meter; all the second lead wire accommodating holes are arranged along the first direction and constitute a second lead wire channel, and the second lead wire channel is used to pass through another group of lead wires inside the electromagnetic water meter.

[0009] In some embodiments of the present invention, the plurality of arc-shaped sheets include a plurality of upper sheets and at least one lower sheet, the lower sheet being provided with a first lead wire accommodating groove and a second lead wire accommodating groove spaced apart from the first lead wire accommodating groove, and along the first direction, the first lead wire accommodating groove and the second lead wire accommodating groove both pass through the lower sheet; the first lead wire accommodating groove is connected to the first lead wire accommodating hole, the first lead wire accommodating groove extends to the end of the lower sheet, and the first lead wire accommodating groove is used to pass through a group of lead wires inside the electromagnetic water meter; the second lead wire accommodating groove is connected to the second lead wire accommodating hole, the second lead wire accommodating groove extends to the end of the lower sheet, and the second lead wire accommodating groove is used to pass through another group of lead wires inside the electromagnetic water meter.

[0010] In some embodiments of the present invention, the multiple arc-shaped sheets include two lower sheets, which are respectively the first sheet and the second sheet. Along the first direction, the first sheet is located on the side of the second sheet away from the multiple upper sheets, and the second arc-shaped surface of the first sheet is used to fit with the outer wall of the conduit in the electromagnetic water meter.

[0011] In some embodiments of the present invention, the lower layer extends along the second direction, the first lead wire accommodating groove and the second lead wire accommodating groove are spaced apart along the second direction, and both the first lead wire accommodating groove and the second lead wire accommodating groove extend along the second direction.

[0012] In some embodiments of the present utility model, each arc-shaped piece is provided with a first fixing stud accommodating hole, and all the first fixing stud accommodating holes are arranged along a first direction and form a first fixing stud channel.

[0013] In some embodiments of the present utility model, each arc-shaped piece further includes a second fixing stud accommodating hole which is arranged at an interval from the first fixing stud accommodating hole, and all the second fixing stud accommodating holes are arranged along the first direction and form a second fixing stud channel.

[0014] In some embodiments of the present utility model, in each arc-shaped piece, the first fixing stud accommodating hole is communicated with the second fixing stud accommodating hole through a grounding electrode accommodating hole.

[0015] In some embodiments of the present utility model, the arc-shaped piece is a carbon steel piece.

[0016] In a second aspect, the present utility model provides an electromagnetic water meter, which includes a coil, a conduit, and any one of the above-mentioned laminated iron core structures. The coil has a mounting hole, the laminated iron core structure is accommodated in the mounting hole, the coil is adhered to the outer wall of the conduit, and the second arc surface of an arc-shaped piece in the laminated iron core structure is adhered to the outer wall of the conduit.

[0017] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features, and advantages of the present application more obvious and understandable, the following specifically illustrates the specific implementation manners of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0019] Figure 1 It is a schematic structural diagram of the laminated iron core structure provided by the embodiment of the present utility model at an angle;

[0020] Figure 2 It is a schematic structural diagram of the laminated iron core structure provided by the embodiment of the present utility model at another angle;

[0021] Figure 3 It is a schematic structural diagram of the laminated iron core structure provided by the embodiment of the present utility model at another angle;

[0022] Figure 4 It is a schematic structural diagram of the upper iron core in the laminated iron core structure provided by the embodiment of the present utility model;

[0023] Figure 5 Schematic diagram of the lower iron core of the laminated iron core structure provided by the embodiment of the present utility model at an angle;

[0024] Figure 6 Schematic diagram of the lower iron core of the laminated iron core structure provided by the embodiment of the present utility model at another angle;

[0025] Figure 7 Schematic diagram of an electromagnetic water meter configured with the laminated iron core structure provided by the embodiment of the present utility model;

[0026] Figure 8 Schematic diagram of another electromagnetic water meter configured with the laminated iron core structure provided by the embodiment of the present utility model.

[0027] The reference numerals are as follows:

[0028] 10000, electromagnetic water meter;

[0029] 1000, laminated iron core structure; 100, arc-shaped sheet; 110, upper sheet; 120, lower sheet; 121, first sheet; 122, second sheet; 101, first arc surface; 102, second arc surface; 103, ground electrode accommodation hole; 104, first lead accommodation hole; 105, second lead accommodation hole; 106, first lead accommodation groove; 107, second lead accommodation groove; 108, first fixing stud accommodation hole; 109, second fixing stud accommodation hole;

[0030] 2000, ground electrode body; 2100, ground electrode lead;

[0031] 3000, measurement electrode body; 3100, shielding cover; 3200, measurement electrode lead;

[0032] 4000, conduit;

[0033] 5000, silicon steel sheet;

[0034] 6000, buried wire clamp;

[0035] 7000, stud body;

[0036] 8000, coil;

[0037] 9000, meter head. Detailed implementation manners

[0038] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0039] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless the order of performance is expressly stated. It should also be understood that additional or alternative steps may be used.

[0040] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first" and "second" and other numerical terms used herein do not imply an order or sequence. Thus, a first element, component, region, layer, or section discussed below may be referred to as a second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0041] For ease of description, spatial relative relationship terms may be used in the text to describe the relationship of one element or feature shown in the figure with respect to another element or feature. These relative relationship terms are, for example, "inner", "outer", "inner side", "outer side", "below", "beneath", "above", "upper", etc. Such spatial relative relationship terms are intended to include different orientations of the device during use or operation other than the orientations depicted in the figure. For example, if the device in the figure is flipped, an element described as "below" or "beneath" other elements or features will then be oriented as "above" or "upper" other elements or features. Therefore, the example term "below" can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in the text are accordingly interpreted.

[0042] The iron cores configured in existing electromagnetic water meters are usually processed in several ways such as wire cutting, powder metallurgy forming, and low-pressure casting forming to cooperate with the assembly relationship with the coil.

[0043] However, for the processing technology of wire cutting forming, after cutting the outer contour of the block-shaped iron core, the machine tool can be used to drill and mill the wire grooves; this processing method has cumbersome steps, a long iron core forming time, and requires large equipment, consuming a lot of manpower and material resources, resulting in too high processing costs. For the processing technology of powder metallurgy forming, the powder material needs to be placed in the mold cavity and pressed into shape with professional equipment; similarly, this method has cumbersome steps, and a separate mold needs to be designed, and the waiting time for the iron core to be pressed and formed is also long, consuming a lot of manpower and material resources, also resulting in relatively high processing costs. For the processing technology of low-pressure casting forming, the lost wax casting method is usually used to form the final iron core. However, the iron core formed by this process is prone to be doped with residues inside, resulting in the generation of pores, thus affecting the magnetic saturation stability of the iron core.

[0044] Based on the above considerations, in order to solve the technical problems of high processing cost and weak magnetic saturation stability of the iron core configured in the electromagnetic water meter, the present utility model designs a laminated iron core structure. This laminated iron core structure includes a plurality of arc-shaped sheets arranged in a laminated manner. Just by simply stacking and assembling the plurality of arc-shaped sheets, an iron core that can be installed on the outer wall of the conduit of the electromagnetic water meter can be formed, reducing the processing cost of the iron core while ensuring the magnetic saturation stability of the iron core.

[0045] Figure 1 It is a schematic structural diagram of the laminated iron core structure provided by an embodiment of the present utility model at an angle; Figure 2 It is a schematic structural diagram of the laminated iron core structure provided by an embodiment of the present utility model at another angle; Figure 3Schematic diagram of the laminated iron core structure provided by the embodiment of the present utility model from another angle; Figure 4 Schematic diagram of the upper iron core in the laminated iron core structure provided by the embodiment of the present utility model; Figure 5 Schematic diagram of the lower iron core in the laminated iron core structure provided by the embodiment of the present utility model from one angle; Figure 6 Schematic diagram of the lower iron core in the laminated iron core structure provided by the embodiment of the present utility model from another angle; Figure 7 Schematic diagram of an electromagnetic water meter configured with the laminated iron core structure provided by the embodiment of the present utility model; Figure 8 Schematic diagram of another electromagnetic water meter configured with the laminated iron core structure provided by the embodiment of the present utility model.

[0046] As Figures 1 to 8 Shown, specifically, the embodiment of the present utility model provides a laminated iron core structure 1000, which is applicable to an electromagnetic water meter 10000. The laminated iron core structure 1000 includes a plurality of arc-shaped sheets 100 stacked in a first direction. Each arc-shaped sheet 100 is provided with a grounding electrode accommodating hole 103. All the grounding electrode accommodating holes 103 are arranged in the first direction and form a grounding electrode channel; the arc-shaped sheet 100 has a first arc surface 101 and a second arc surface 102 correspondingly arranged with the first arc surface 101. The second arc surface 102 is configured to be able to fit with the outer wall of the conduit 4000 in the electromagnetic water meter 10000. The first arc surface 101 of the arc-shaped sheet 100 and the second arc surface 102 of the arc-shaped sheet 100 adjacent to this arc-shaped sheet 100 are in contact.

[0047] Among them, the material of the arc-shaped sheet 100 can be selected as carbon steel, such as DC04 high-quality steel. DC04 high-quality steel is a conventional material in the national standard, with a low cost, and the iron element composition is stable. After lamination treatment, the magnetic saturation phenomena of each layer of carbon steel sheets are close. Therefore, it can further ensure the magnetic saturation stability of the finally formed laminated iron core structure 1000.

[0048] In addition, since the DC04 high-quality steel is usually in the form of a 2-mm-thick sheet, when processing the laminated iron core structure 1000, a single sheet can be first formed by stamping, and then the single sheet can be bent and shaped to form the arc-shaped sheet 100. The length of the single sheet should be based on the size of the mounting hole of the corresponding coil 8000, and the radian of the arc-shaped sheet 100 should be based on the radian of the outer wall of the conduit 4000 in the corresponding electromagnetic water meter 10000, so that the final arc-shaped sheet 100 can be accommodated in the mounting hole of the coil 8000 of the electromagnetic water meter 10000, and the second arc surface 102 of the arc-shaped sheet 100 can be fitted to the outer wall of the conduit 4000. By analogy, multiple arc-shaped sheets 100 can be processed and formed; then, the final laminated iron core structure 1000 can be formed by spot welding, that is, along the first direction, adjacent two layers of arc-shaped sheets 100 are connected by spot welding to ensure the stability of the finally formed laminated iron core structure 1000.

[0049] Furthermore, it is easy to understand that the laminated iron core structure 1000 should be configured to be able to be accommodated in the mounting hole of the coil 8000 of the electromagnetic water meter 10000 so as to finally generate a magnetic field.

[0050] In this embodiment, when assembling this laminated iron core structure 1000, multiple arc-shaped sheets 100 are stacked in sequence along the first direction, ensuring that the first arc surface 101 of the arc-shaped sheet 100 and the second arc surface 102 of the arc-shaped sheet 100 adjacent to this arc-shaped sheet 100 are closely fitted, and thus the overall assembly of the laminated iron core structure 1000 can be achieved; then the assembled laminated iron core structure 1000 is placed in the mounting hole of the coil 8000, and the laminated iron core structure 1000 and the coil 8000 are jointly fitted to the outer wall of the conduit 4000 in the electromagnetic water meter 10000, and thus a stable magnetic field generating mechanism in the electromagnetic water meter 10000 can be formed; it is easy to understand that the purpose of setting the grounding electrode channel is that when assembling the electromagnetic water meter 10000, the grounding electrode body 2000 inside the electromagnetic water meter 10000 can pass through the entire laminated iron core structure 1000.

[0051] Therefore, this laminated iron core structure 1000 has a simple structure and is convenient to assemble, without the participation of large equipment and complex operations, saving manpower and material resources and effectively reducing the processing cost; in addition, since the laminated iron core structure 1000 is composed of multiple arc-shaped sheets 100 stacked together, there will be no situation where air holes are generated due to doping residues inside the iron core, and the magnetic saturation stability of the laminated iron core structure 1000 can also be ensured. [[ID=!!]]

[0052] Reference Figures 1 to 6, According to an optional embodiment of the present utility model, each arc-shaped piece 100 is provided with a first lead accommodating hole 104 and a second lead accommodating hole 105 arranged at an interval from the first lead accommodating hole 104; all the first lead accommodating holes 104 are arranged along a first direction and form a first lead channel for passing a set of leads inside the electromagnetic water meter 10000; all the second lead accommodating holes 105 are arranged along the first direction and form a second lead channel for passing another set of leads inside the electromagnetic water meter 10000.

[0053] Among them, since there are many internal structures in the electromagnetic water meter 10000 and the wiring form is relatively complicated, it should be noted that the first lead channel and the second lead channel are respectively used for passing different sets of leads; each set of leads may include only one lead or multiple (two or more) leads; and the type of the lead can be a measurement electrode lead 3200 or a grounding electrode lead; the specific number and type of the above leads can be determined according to the actual working conditions and are not limited.

[0054] For the convenience of description, hereinafter, taking the first lead channel for passing a measurement electrode lead 3200 and the second lead channel for passing another measurement electrode lead 3200 as an example, the assembly method of the leads will be described in detail.

[0055] Refer to Figure 7 and Figure 8 , it is easy to understand that when assembling the electromagnetic water meter 10000, silicon steel sheets 5000 are provided in the circumferential direction of the outer wall of the conduit 4000, and a closed space is formed by enclosing the outer wall of the conduit 4000 and the silicon steel sheets 5000. The coil 8000 and the laminated iron core structure 1000 assembled in this closed space form a magnetic field generating mechanism, and all the above components cooperate together to form a closed magnetic field. Also, since there are two measurement electrode bodies 3000 inside the electromagnetic water meter 10000, both of the two measurement electrode leads 3200 need to extend to the outside of the above closed magnetic field to meet the subsequent signal connection (that is, finally both of the two measurement electrode leads 3200 are signal-connected to the meter head 9000 of the electromagnetic water meter 10000).

[0056] Therefore, in this embodiment, in order to meet the routing paths of the two measurement electrode leads 3200 inside the electromagnetic water meter 10000, a first lead channel and a second lead channel are provided inside the laminated iron core structure 1000. The purpose is that when the laminated iron core structure 1000 is assembled on the outer wall of the conduit 4000 of the electromagnetic water meter 10000, the two measurement electrode leads 3200 inside the electromagnetic water meter 10000 can pass through the inside of the closed magnetic field, so as to meet the requirement that both of the two measurement electrode leads 3200 can extend to the outside of the above closed magnetic field, and further meet the subsequent signal connection.

[0057] Refer toFigures 1 to 7 Specifically, the routing of a measuring electrode lead 3200 is illustrated. After extending from a measuring electrode body 3000, the measuring electrode lead 3200 enters the first lead channel through the first lead-accommodating hole 104 in the bottommost curved piece 100 of the laminated iron core structure 1000 (i.e., the curved piece 100 closest to the conduit 4000 in the first direction). After passing through the first lead channel, the measuring electrode lead 3200 exits the enclosed magnetic field through the first lead-accommodating hole 104 in the topmost curved piece 100 of the laminated iron core structure 1000 (i.e., the curved piece 100 farthest from the conduit 4000 in the first direction) to facilitate subsequent signal connection. The routing of the other measuring electrode lead 3200 is similar to the above, being routed through the second lead channel and will not be further described here.

[0058] In addition, it is easy to understand that the above-mentioned method of the measuring electrode lead 3200 passing through the first lead channel / the second lead channel is the "inner routing" method of the measuring electrode lead 3200, that is, the measuring electrode lead 3200 passes through the inside of the closed magnetic field; and the measuring electrode lead 3200 can also choose the "external routing" method, that is, the measuring electrode lead 3200 extends from the outside of the closed magnetic field.

[0059] refer to Figures 1 to 6 ,as well as Figure 8 Specifically, the routing of a measuring electrode lead 3200 is also described. After being led out of a measuring electrode body 3000, the measuring electrode lead 3200 directly passes through the shielding cover 3100 of the measuring electrode body 3000, is led out to the outside of the closed magnetic field, and then extends around the outer wall of the conduit 4000 until it reaches the meter head 9000 of the electromagnetic water meter 10000, thereby establishing a signal connection between the measuring electrode lead 3200 and the meter head 9000. In addition, a buried wire clamp 6000 can be provided on the outer wall of the conduit 4000. The measuring electrode lead 3200 can be fixed to the outer wall of the conduit 4000 by the buried wire clamp 6000, thereby further improving the stability of the measuring electrode lead 3200. Similarly, the "external routing" method of the two measuring electrode leads 3200 is the same and will not be repeated here.

[0060] Therefore, the setting of the first lead wire accommodating hole 104 and the second lead wire accommodating hole 105 in this embodiment can enable the measuring electrode lead 3200 of the electromagnetic water meter 10000 equipped with this laminated iron core structure 1000 to have a variety of routing formations, effectively improving the overall compatibility of the laminated iron core structure 1000 and the electromagnetic water meter 10000, thereby effectively improving the usage scenarios of the laminated iron core structure 1000.

[0061] like Figure 8As shown, it should be noted that after the measurement electrode lead 3200 is led out of the closed magnetic field, its position is naturally close to the grounding electrode lead 2100 connected to the grounding electrode body 2000. The measurement electrode lead 3200 and the grounding electrode lead 2100 can be bundled together with a tie strap (not shown in the figure) to further improve the stability of the measurement electrode lead 3200 and the grounding electrode lead 2100.

[0062] As Figures 1 to 6 shown, according to an optional embodiment of the present invention, the plurality of arc-shaped sheets 100 include a plurality of upper sheets 110 and at least one lower sheet 120. The lower sheet 120 is provided with a first lead accommodating groove 106 and a second lead accommodating groove 107 spaced apart from the first lead accommodating groove 106. Along the first direction, both the first lead accommodating groove 106 and the second lead accommodating groove 107 penetrate through the lower sheet 120; the first lead accommodating groove 106 is communicated with the first lead accommodating hole 104, and the first lead accommodating groove 106 extends to the end of the lower sheet 120. The first lead accommodating groove 106 is used for threading a set of leads inside the electromagnetic water meter 10000; the second lead accommodating groove 107 is communicated with the second lead accommodating hole 105, and the second lead accommodating groove 107 extends to the end of the lower sheet 120. The second lead accommodating groove 107 is used for threading another set of leads inside the electromagnetic water meter 10000.

[0063] Among them, to show the relationship between the first lead accommodating groove 106 and the first lead accommodating hole 104, Figure 6 the original position of the first lead accommodating hole 104 is specifically indicated by a dotted line. It is easy to understand that when the first lead accommodating groove 106 is communicated with the first lead accommodating hole 104, the two can jointly form a longer groove for accommodating the measurement electrode lead 3200. Therefore, the first lead accommodating hole 104 does not have a separate contour, so Figure 6 the original position is indicated by a dotted line in. The relationship between the second lead accommodating groove 107 and the second lead accommodating hole 105 is the same as the relationship between the first lead accommodating groove 106 and the first lead accommodating hole 104 described above. Figure 6 The original position of the second lead accommodating hole 105 is also indicated by a dotted line in, and the specific reason will not be elaborated.

[0064] In this embodiment, the purpose of setting the lower sheet 120 is to make it more convenient for the electromagnetic water meter 10000 equipped with this laminated iron core structure 1000 to achieve the "internal wiring" form.

[0065] Similarly, according to the definition of each group of leads in the above text, for the convenience of description, in the following text, taking the first lead accommodating groove 106 for passing a measurement electrode lead 3200 inside the electromagnetic water meter 10000 and the second lead accommodating groove 107 for passing another measurement electrode lead 3200 inside the electromagnetic water meter 10000 as an example, the wiring method will be described in detail; continue to refer to Figures 1 to 7 Specifically, still taking the wiring method of a measurement electrode lead 3200 as an example, after the measurement electrode lead 3200 is led out from a measurement electrode body 3000, it is introduced into the first lead accommodating groove 106 in the arc-shaped piece 100 at the bottom of the laminated iron core structure 1000 (that is, the arc-shaped piece 100 closest to the conduit 4000 in the first direction), and then introduced into the first lead accommodating hole 104 communicating with the first lead accommodating groove 106, so that the measurement electrode lead 3200 can be introduced into the first lead channel from the first lead accommodating hole 104. After passing through the first lead channel, the measurement electrode lead 3200 passes through the first lead accommodating hole 104 in the arc-shaped piece 100 at the top of the laminated iron core structure 1000 (that is, the arc-shaped piece 100 farthest from the conduit 4000 in the first direction) to penetrate the closed magnetic field, so as to realize subsequent signal connection. The wiring method of the other measurement electrode lead 3200 is the same as the above, introduced through the second lead accommodating hole 105 and finally led out through the second lead channel, which will not be elaborated here.

[0066] Therefore, in this embodiment, the setting of the first lead accommodating groove 106 and the second lead accommodating groove 107 has a certain guiding effect on the part of the measurement electrode lead 3200 located in the lowest layer (that is, the side closest to the conduit 4000 in the first direction) inside the laminated iron core structure 1000 when the measurement electrode lead 3200 adopts the "inner wiring" method. That is, the measurement electrode lead 3200 just led out from the measurement electrode body 3000 is guided through the first lead accommodating groove 106 / the second lead accommodating groove 107. And because the first lead accommodating groove 106 / the second lead accommodating groove 107 extends to the end of the lower layer piece 120, that is, the slot opening area is relatively large, it can reduce the situation that the part of the measurement electrode lead 3200 located in the lowest layer inside the laminated iron core structure 1000 is squeezed to a certain extent, thereby reducing the risk of damage to the measurement electrode lead 3200 due to being squeezed, and ensuring the working efficiency of the service life of the measurement electrode lead 3200 to a certain extent.

[0067] Such as Figure 1 and Figure 7As shown, according to an optional embodiment of the present invention, the multiple curved sheets 100 include two lower sheets 120, and the two lower sheets 120 are respectively a first sheet 121 and a second sheet 122. Along the first direction, the first sheet 121 is located on the side of the second sheet 122 away from the multiple upper sheets 110, and the second curved surface 102 of the first sheet 121 is used to fit with the outer wall of the conduit 4000 in the electromagnetic water meter 10000.

[0068] Here, taking the example of using DC04 high-quality steel as the material for the curved sheet 100, which is a standard material that meets national standards, the final thickness of the curved sheet 100 is 2 mm. The outer diameter of the measuring electrode lead 3200 generally also has a certain range. Here, taking the outer diameter of the measuring electrode lead 3200 as 2.5 mm as an example, it is easy to understand that to further prevent the measuring electrode lead 3200 from being squeezed in the lowermost portion of the laminated core structure 1000, the thickness of the first lead-containing groove 106 (i.e., the dimension in the first direction) should be at least greater than 2.5 mm. Since the thickness of the curved sheet 100 is only 2 mm, it is obviously impossible to provide only a lower layer sheet 120. The analysis of the second lead-containing groove 107 is similar and will not be repeated here.

[0069] Therefore, this embodiment provides two lower layers 120, i.e., the thickness of the first lead accommodating groove 106 of the first layer 121 and the thickness of the first lead accommodating groove 106 of the second layer 122 is added up to 4 mm, which satisfies the condition of being greater than 2.5 mm, and can further prevent the measuring electrode lead 3200 from being squeezed at the bottom layer inside the laminated iron core structure 1000, thereby further reducing the risk of the measuring electrode lead 3200 being damaged due to squeezing, and further effectively ensuring the working efficiency of the measuring electrode lead 3200 during its service life.

[0070] In addition, the number of lower layer sheets 120 should not be too many; if the number of lower layer sheets 120 is too many, the measuring electrode lead 3200 will be "suspended" in the part located in the multiple first lead accommodating grooves 106 / second lead accommodating grooves 107, that is, the measuring electrode lead 3200 cannot be stably fixed inside the laminated iron core structure 1000, which is not conducive to the stability of the measuring electrode lead 3200.

[0071] Therefore, in this embodiment, two lower layers 120 are provided, which can further reduce the squeezing of the portion of the measuring electrode lead 3200 located at the bottom layer inside the laminated iron core structure 1000, and can also prevent the "floating" phenomenon of this portion of the measuring electrode lead 3200, thereby more effectively ensuring the working efficiency of the service life of the measuring electrode lead 3200.

[0072] like Figure 1 、 Figure 5 andFigure 6 As shown, according to an optional embodiment of the present utility model, the lower layer sheet 120 extends in the second direction, the first lead accommodating groove 106 and the second lead accommodating groove 107 are arranged at intervals in the second direction, and both the first lead accommodating groove 106 and the second lead accommodating groove 107 extend in the second direction.

[0073] In this embodiment, since the two measurement electrode bodies 3000 in the electromagnetic water meter 10000 are usually symmetrically arranged with respect to the conduit 4000, therefore, the first lead accommodating groove 106 and the second lead accommodating groove 107 are also arranged in a symmetrical manner, and at the same time, the extending directions of the two are the same as the extending direction of the lower layer sheet 120, so as to more conveniently play a guiding role for the measurement electrode leads 3200.

[0074] Reference Figures 1 to 6 , according to an optional embodiment of the present utility model, each arc-shaped sheet 100 is provided with a first fixing stud accommodating hole 108, and all the first fixing stud accommodating holes 108 are arranged in the first direction and form a first fixing stud channel.

[0075] Refer to together Figure 8 , in this embodiment, when assembling this laminated iron core structure 1000 to the outer wall of the conduit 4000 of the electromagnetic water meter 10000, it is necessary to fix the two to ensure the stability of the assembly. Therefore, a first fixing stud channel for passing through the stud body 7000 is provided in the laminated iron core structure 1000, and then the laminated iron core structure 1000 can be tightened to the outer wall of the conduit 4000 through the stud body 7000, as Figure 8 shown; it is easy to understand that, in order to ensure the formation of a closed magnetic field, the stud body 7000 should also pass through the silicon steel sheet 5000 together to realize the fixed connection of the silicon steel sheet 5000 relative to the conduit 4000, thereby ensuring the stability of the closed magnetic field.

[0076] Continue to refer to Figures 1 to 6 , specifically, according to an optional embodiment of the present utility model, each arc-shaped sheet 100 further includes a second fixing stud accommodating hole 109 which is arranged at intervals with the first fixing stud accommodating hole 108, and all the second fixing stud accommodating holes 109 are arranged in the first direction and form a second fixing stud channel.

[0077] In this embodiment, the function of the second fixing stud channel is the same as that of the above-mentioned first fixing stud channel, which will not be elaborated here. It is easy to understand that the laminated iron core structure 1000 and the silicon steel sheet 5000 can be fixed to the outer wall of the conduit 4000 through multiple stud bodies 7000. In this embodiment, only two stud bodies 7000 are used for illustration. Under actual working conditions, the number of stud bodies 7000 can be determined according to actual needs, as long as it is ensured that the laminated iron core structure 1000 and the silicon steel sheet 5000 can be stably assembled on the outer wall of the conduit 4000 to form a closed magnetic field. The specific number of stud bodies 7000 is not limited.

[0078] As Figures 1 to 6 shown, according to an optional embodiment of the present invention, in each arc-shaped piece 100, the first fixing stud accommodating hole 108 communicates with the second fixing stud accommodating hole 109 through the grounding electrode accommodating hole 103.

[0079] In this embodiment, the first fixing stud accommodating hole 108 communicates with the second fixing stud accommodating hole 109 through the grounding electrode accommodating hole 103, that is, the above three holes together form a large hole. In this way of setting, when processing the arc-shaped piece 100, there is no need to separately process each hole, thereby improving the forming efficiency of the arc-shaped piece 100.

[0080] Specifically, as Figure 1 and Figure 4 shown, for the upper layer piece 110, the first fixing stud accommodating hole 108 can be made to communicate with the second fixing stud accommodating hole 109 through the grounding electrode accommodating hole 103, and the first lead accommodating hole 104 can be made to communicate with the second lead accommodating hole 105 through the grounding electrode accommodating hole 103, that is, a large hole is formed with the grounding electrode accommodating hole 103 in the middle, and the first fixing stud accommodating hole 108, the second fixing stud accommodating hole 109, the first lead accommodating hole 104 and the second lead accommodating hole 105 are respectively communicated around the grounding electrode accommodating hole 103. In this way, the forming efficiency of the upper layer piece 110 can be further improved.

[0081] Referring to Figure 7 and Figure 8 , the embodiment of the present invention also provides an electromagnetic water meter 10000. The electromagnetic water meter 10000 includes a coil 8000, a conduit 4000, and any one of the above-mentioned laminated iron core structures 1000. The coil 8000 has a mounting hole, the laminated iron core structure 1000 is accommodated in the mounting hole, the coil 8000 is attached to the outer wall of the conduit 4000, and the second arc-shaped surface 102 of an arc-shaped piece 100 in the laminated iron core structure 1000 is attached to the outer wall of the conduit 4000.

[0082] Among them, it is easy to understand that the coil 8000 can be a saddle-shaped rectangular coil. The bottom surface of the saddle-shaped rectangular coil has a radian, which is convenient for the coil 8000 to fit the outer wall of the conduit 4000.

[0083] In this embodiment, when assembling the electromagnetic water meter 10000, the assembled laminated iron core structure 1000 is placed in the mounting hole of the coil 8000, and the laminated iron core structure 1000 and the coil 8000 are together fitted to the outer wall of the conduit 4000 in the electromagnetic water meter 10000, ensuring that the grounding electrode body 2000 of the electromagnetic water meter 10000 penetrates through the grounding electrode channel, and at the same time ensuring that the two measurement electrode leads 3200 can finally extend to the outside of the closed magnetic field (specifically, refer to the above description of the two methods of "internal wiring" or "external wiring", which will not be elaborated here). Then, the laminated iron core structure 1000 and the silicon steel sheet 5000 are both stably fixed to the outer wall of the conduit 4000 through the stud body 7000 to ensure the stability of the closed magnetic field. Finally, the two measurement electrode leads 3200 are signal-connected to the meter head 9000, and the assembly of the electromagnetic water meter 10000 is completed.

[0084] The beneficial effects of the electromagnetic water meter 10000 are the same as those of any one of the above-mentioned laminated iron core structures 1000, that is, while reducing the processing cost of the iron core, it can also ensure the magnetic saturation stability of the iron core. Specifically, refer to the analysis of the beneficial effects of any one of the above-mentioned laminated iron core structures 1000, which will not be elaborated here.

[0085] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any change or replacement that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A laminated iron core structure suitable for electromagnetic water meter, characterized in that: The laminated iron core structure includes a plurality of arcuate sheets stacked along a first direction, each of the arcuate sheets is provided with a grounding electrode accommodating hole, and all the grounding electrode accommodating holes are arranged along the first direction and constitute a grounding electrode channel; the arcuate sheet has a first arcuate surface and a second arcuate surface arranged corresponding to the first arcuate surface, and the second arcuate surface is configured to be able to fit with the outer wall of the conduit in the electromagnetic water meter, and the first arcuate surface of the arcuate sheet fits with the second arcuate surface of the arcuate sheet adjacent to the arcuate sheet.

2. The laminated core structure according to claim 1, wherein: Each of the arc-shaped pieces is provided with a first lead wire accommodating hole and a second lead wire accommodating hole spaced apart from the first lead wire accommodating hole; All the first lead wire accommodating holes are arranged along the first direction and form a first lead wire channel, and the first lead wire channel is used to pass a group of lead wires inside the electromagnetic water meter; All the second lead wire accommodating holes are arranged along the first direction and form a second lead wire channel, and the second lead wire channel is used to pass another group of lead wires inside the electromagnetic water meter.

3. The laminated core structure according to claim 2, wherein: The plurality of arc-shaped sheets include a plurality of upper sheets and at least one lower sheet, the lower sheet being provided with a first lead wire accommodating groove and a second lead wire accommodating groove spaced apart from the first lead wire accommodating groove, and along the first direction, the first lead wire accommodating groove and the second lead wire accommodating groove both pass through the lower sheet; The first lead wire accommodating groove is communicated with the first lead wire accommodating hole, and the first lead wire accommodating groove extends to the end of the lower layer. The first lead wire accommodating groove is used to pass a group of lead wires inside the electromagnetic water meter; The second lead wire accommodating groove is communicated with the second lead wire accommodating hole, and the second lead wire accommodating groove extends to the end of the lower layer. The second lead wire accommodating groove is used to pass another set of lead wires inside the electromagnetic water meter.

4. The laminated core structure according to claim 3, wherein: The multiple arc-shaped sheets include two lower-layer sheets, which are respectively a first sheet and a second sheet. Along the first direction, the first sheet is located on the side of the second sheet away from the multiple upper-layer sheets, and the second arc-shaped surface of the first sheet is used to fit with the outer wall of the conduit in the electromagnetic water meter.

5. The laminated core structure according to claim 3, wherein: The lower layer extends along the second direction, The first lead wire accommodating groove and the second lead wire accommodating groove are spaced apart along the second direction, and both the first lead wire accommodating groove and the second lead wire accommodating groove extend along the second direction.

6. The laminated core structure according to claim 1, wherein: Each of the arc-shaped pieces is provided with a first fixing stud accommodating hole, and all of the first fixing stud accommodating holes are arranged along the first direction and form a first fixing stud channel.

7. The laminated core structure according to claim 6, wherein: Each of the arc-shaped pieces includes a second fixing stud accommodating hole spaced apart from the first fixing stud accommodating hole, and all of the second fixing stud accommodating holes are arranged along the first direction and form a second fixing stud channel.

8. The laminated core structure according to claim 7, wherein: In each of the arc-shaped pieces, the first fixing stud accommodating hole is communicated with the second fixing stud accommodating hole through the ground electrode accommodating hole.

9. The laminated core structure according to any one of claims 1 to 8, characterized in that: The arc-shaped sheet is a carbon steel sheet.

10. An electromagnetic water meter, characterized in that: The invention comprises a coil, a conduit and a laminated iron core structure according to any one of claims 1 to 9, wherein the coil has a mounting hole, the laminated iron core structure is accommodated in the mounting hole, the coil is in contact with the outer wall of the conduit, and the second arcuate surface of one of the arcuate pieces in the laminated iron core structure is in contact with the outer wall of the conduit.

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