Static magnetic field shielding structure applied to electromagnetic water meter

Abstract

The utility model relates to a static magnetic field shielding structure applied to an electromagnetic water meter, and relates to the technical field of electromagnetic water meters. The flow measuring assembly comprises an outer shell and a static magnetic field shielding layer arranged on the outer shell, a cavity is formed in the outer shell, the flow measuring assembly is arranged in the cavity, and the static magnetic field shielding layer is arranged on the inner side of the outer shell. The influence of an external strong magnetic field on the measurement precision of the electromagnetic water meter is greatly reduced, so that the electromagnetic water meter can meet the measurement precision under the action of the external strong magnetic field.

Description

Technical Field

[0001] This application relates to the technical field of electromagnetic water meters, and in particular to a static magnetic field shielding structure applied to electromagnetic water meters. Background Art

[0002] The working principle of an electromagnetic water meter is based on Faraday's law of electromagnetic induction. When water flows through the pipe, a magnetic field is generated by the coil through the principle of electromagnetic induction. The water flow cuts the magnetic force lines, and an electromotive force is generated at both ends. The magnitude of the electromotive force is proportional to the magnitude of the water flow. Therefore, the magnitude of the water flow is calculated by measuring the magnitude of the electromotive force.

[0003] However, since the internal magnetic field of the electromagnetic water meter is easily interfered by the external magnetic field, which affects the measurement accuracy, it is usually necessary to add a magnetic field shielding layer to the electromagnetic water meter to reduce the interference of the external magnetic field. Utility Model Content

[0004] In order to minimize the interference of the external magnetic field on the electromagnetic water meter, this application provides a static magnetic field shielding structure applied to electromagnetic water meters.

[0005] A static magnetic field shielding structure applied to an electromagnetic water meter provided by this application adopts the following technical solutions:

[0006] A static magnetic field shielding structure applied to an electromagnetic water meter includes an outer shell and a static magnetic field shielding layer provided on the inner wall of the outer shell. There is a cavity inside the outer shell, and a flow measurement component is provided in the cavity. The static magnetic field shielding layer is placed on the inner wall of the outer shell.

[0007] By adopting the above technical solutions, the static magnetic field shielding layer can effectively shield the external static magnetic field interference, and improve the measurement accuracy of the electromagnetic water meter.

[0008] Preferably, the static magnetic field shielding layer is provided with multiple layers, and the multiple layers of the static magnetic field shielding layer are stacked on the inner wall of the outer shell.

[0009] By adopting the above technical solutions, the shielding ability can be further improved through the stacked structure of the multiple layers of the static magnetic field shielding layer.

[0010] Preferably, the static magnetic field shielding layer is composed of silicon steel sheets.

[0011] By adopting the above technical solutions, the silicon steel sheets have excellent magnetic properties such as high magnetic permeability, low magnetic hysteresis loss, and high magnetic saturation induction intensity, and can effectively shield the external static magnetic field interference.

[0012] Preferably, the static magnetic field shielding layer is composed of soft magnetic materials.

[0013] By adopting the above technical solution and utilizing soft magnetic materials, the flow measurement components inside the shell can be prevented from being affected by external electromagnetic interference as much as possible.

[0014] Preferably, an opening is provided on the outer shell, and the static magnetic field shielding layer is butted against two ends of the opening.

[0015] By adopting the above technical solution, the opening is set to facilitate the subsequent threading work of the electromagnetic water meter when it is put into use, and the static magnetic field shielding layer is butt-jointed with both ends of the opening to ensure the continuity of the magnetic shielding as much as possible and reduce the impact on the shielding effect.

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] 1. By setting a static magnetic field shielding layer on the inner wall of the shell, the external static magnetic field interference can be effectively shielded, thereby improving the measurement accuracy of the electromagnetic water meter;

[0018] 2. The static magnetic field shielding layer can be selected into one or more layers according to actual needs, and silicon steel sheets or other soft magnetic materials can be selected, so as to provide more diversified shielding solutions, which can be flexibly selected according to actual needs and cost considerations, further enhancing the flexibility and applicability of the shielding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application;

[0020] Figure 2 is a cross-sectional schematic diagram of Example 1 of the present application;

[0021] Figure 3 This is a partial cross-sectional schematic diagram of the static magnetic field shielding layer docking arrangement on opposite sides of the opening for demonstrating the present application embodiment 1;

[0022] Figure 4 It is a cross-sectional schematic diagram of Example 2 of the present application.

[0023] Reference numerals: 100, flow measurement component; 1, outer shell; 11, cavity; 12, opening; 2, static magnetic field shielding layer. DETAILED DESCRIPTION

[0024] The following is combined with Figures 1-4 This application is described in further detail.

[0025] Embodiment 1:

[0026] Embodiment 1 of the present application discloses a static magnetic field shielding structure applied to an electromagnetic water meter.

[0027] Reference Figure 1 and Figure 2, A static magnetic field shielding structure applied to an electromagnetic water meter includes a housing 1, a static magnetic field shielding layer 2 provided on the inner wall of the housing 1. There is a cavity 11 inside the housing 1, and a flow measurement component 100 is arranged in the cavity 11. The static magnetic field shielding layer is provided on the inner wall of the housing 1 and wraps the flow measurement component 100, so as to minimize the interference of the external magnetic field on the electromagnetic water meter.

[0028] The housing 1 is integrally in a circular tube shape, and in this embodiment, the housing 1 is processed from a circular tube, which has sufficient strength and corrosion resistance to protect the internal parts of the housing. Moreover, an opening 12 is also provided on the housing 1 for facilitating the wire threading work of the electromagnetic water meter.

[0029] Refer to Figure 2 and Figure 3 , The static magnetic field shielding layer 2 is provided with multiple layers. In this embodiment, three layers are taken as an example for illustration. The multiple layers of the static magnetic field shielding layer 2 are stacked on the inner wall of the housing 1, and the static magnetic field shielding layers 2 on both sides relative to the opening 12 are butt-jointed, thus forming a continuous shielding layer. In this embodiment, the static magnetic field shielding layer 2 is made of silicon steel sheets. The silicon steel sheets have excellent magnetic properties such as high magnetic permeability, low hysteresis loss, and high magnetic saturation induction intensity, and can effectively shield external static magnetic field interference and improve the measurement accuracy of the flow measurement component 100.

[0030] Flanges 3 are provided on opposite sides of the housing 1. In this embodiment, the connecting member 3 is set as a metal flange, and a plurality of mounting holes 4 are provided on the periphery of the connecting member 3 to facilitate the installation of the electromagnetic water meter to a designated position.

[0031] The implementation principle of the static magnetic field shielding structure applied to the electromagnetic water meter in Embodiment 1 of this application is: by setting the stacked structure of multiple layers of the static magnetic field shielding layer 2, an effective magnetic shield is formed to prevent the external static magnetic field from interfering with the flow measurement component 100 as much as possible, thereby ensuring the accuracy of the measurement of the electromagnetic water meter.

[0032] Embodiment 2:

[0033] Embodiment 2 of this application discloses a static magnetic field shielding structure applied to an electromagnetic water meter.

[0034] Refer to Figure 4 , which is basically the same as the structure of Embodiment 1, except that: the static magnetic field shielding layer 2 is replaced by one or more layers of soft magnetic materials instead of the stacked structure of multiple layers of silicon steel sheets. The soft magnetic materials can be, for example, iron-nickel alloys, nanocrystals, etc., and can also minimize the influence of external electromagnetic interference on the flow measurement component inside the housing.

[0035] The implementation principle of the static magnetic field shielding structure of Application Example 2 of this application for an electromagnetic water meter is as follows: By providing a static magnetic field shielding layer 2 made of one or more layers of soft magnetic materials, it is also possible to reduce the interference of the external static magnetic field on the flow measurement component 100, thereby ensuring the accuracy of the measurement of the electromagnetic water meter.

[0036] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A static magnetic field shielding structure applied to an electromagnetic water meter, characterized in that: The invention comprises an outer shell (1) and a static magnetic field shielding layer (2) arranged on the inner wall of the outer shell (1); the outer shell (1) has a cavity (11) inside, a flow measurement component (100) is arranged in the cavity (11), and the static magnetic field shielding layer (2) is arranged on the inner wall of the outer shell (1).

2. The static magnetic field shielding structure applied to an electromagnetic water meter according to claim 1, characterized in that: The static magnetic field shielding layer (2) is composed of multiple layers of soft magnetic material stacked together and is arranged on the inner wall of the outer shell (1).

3. A static magnetic field shielding structure for an electromagnetic water meter according to claim 1 or 2, characterized in that: The static magnetic field shielding layer (2) is made of silicon steel sheets.

4. A static magnetic field shielding structure for an electromagnetic water meter according to claim 1 or 2, characterized in that: The static magnetic field shielding layer (2) is made of soft magnetic material.

5. The static magnetic field shielding structure applied to an electromagnetic water meter according to claim 1, characterized in that: The outer shell (1) is provided with an opening (12), and the static magnetic field shielding layer (2) is butted against both ends of the opening (12).

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