Coil magnet fixing structure of flowmeter
By adopting a welded fixing structure of the magnet bracket and the coil bracket in the flow meter, the problem of the coil magnet being loosely fixed and the coaxiality being difficult to ensure is solved, higher concentricity and vibration stability are achieved, and processing costs and time are reduced.
Patent Information
- Application Number
- CN202423001473.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-12-06
AI Technical Summary
The existing coil magnet fixing method of the flow meter has problems such as inaccurate positioning, loose fixation, difficulty in ensuring coaxiality, low one-time pass rate, and difficulty in rework.
The magnet bracket and coil bracket are fixed to the outside of the measuring tube by welding, the magnetic conductor and the magnet collar are fixed by welding, the coil and the magnet are connected by a bolt and nut assembly, and the magnet collar is used to limit the radial displacement of the magnet to ensure concentricity and stability.
Improved coil magnet concentricity and vibration stability, reduced processing time and cost, enhanced customization and assembly convenience, and improved flow meter performance.
Smart Images
Figure CN223400436U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flow meters, in particular to a coil magnet fixing structure of a flow meter. Background Art
[0002] The Coriolis mass flowmeter (hereinafter referred to as the flowmeter) is a representative of the advanced technology in mass flow measurement instruments. It is a high-precision instrument that measures mass flow and density by generating a phase difference related to mass flow and a frequency related to density through the torsional vibration of the measuring mechanism.
[0003] A Coriolis mass flowmeter measures flow rate by utilizing the phase difference generated by the vibration of the measuring tube, which is proportional to the mass of the fluid flowing through it. The vibration system of a mass flowmeter primarily consists of the measuring tube, a vibrating plate, a coil assembly, and a magnet assembly. Both the coil assembly and the magnet assembly are divided into a drive section and a sampling section. The drive section provides the appropriate driving force to initiate the vibration of the measuring tube and maintain resonance at an appropriate amplitude. The sampling section generates a sampling signal, which is transmitted to the transmitter for calculating the phase difference and providing feedback to adjust the driving force of the drive section.
[0004] Coils and magnets are core components of flowmeters. Different flowmeters require different methods for securing the coils and magnets. Because the flowmeter's measuring tube requires regular vibration under the excitation of the coil and magnet assemblies, strict positioning requirements are imposed on the coil and magnet assemblies. Existing manufacturing processes often result in defects such as inaccurate positioning, loose fixings, difficulty ensuring coaxiality, low first-pass yields, and difficulty in repair. Utility Model Content
[0005] In order to solve the technical problems such as inaccurate positioning, loose fixation, difficulty in ensuring coaxiality, low one-time pass rate, and difficulty in rework that often occur in the existing processing technology production process, the utility model provides a coil magnet fixing structure for a flow meter.
[0006] The utility model is implemented by the following technical solution: a coil magnet fixing structure of a flow meter, comprising two measuring tubes, one outer side of one measuring tube is fixedly connected to a magnet holder, one side of the magnet holder is fixedly connected to a magnet assembly, the magnet assembly comprises a magnetic conductor, a magnet collar and a magnet, the inner side of the magnetic conductor is fixedly connected to the magnet collar, one end of the magnet is located inside the magnet collar, the outer side of the other measuring tube is fixedly connected to a coil holder, one side of the coil holder is fixedly connected to a coil, and the other end of the magnet is located inside the coil.
[0007] Preferably, the arc size of the tangent arc of the magnet bracket and the coil bracket is the same as the outer diameter of the measuring tube.
[0008] Preferably, the magnet bracket and the coil bracket are respectively fixed to the inner sides of the outer parts of the two measuring tubes by welding.
[0009] Preferably, the magnetic conductor is soft iron, and the magnetic conductor is fixed to one side of the magnet bracket by welding.
[0010] Preferably, the magnet ring is fixed to the inner side of the magnet conductor by spot welding.
[0011] Preferably, one end of the magnet is magnetically connected to the magnet conductor, and the magnet ring is used to limit the radial displacement of the magnet.
[0012] Preferably, two through holes are processed at both ends of the coil support and the coil, and bolt and nut assemblies are provided inside the through holes, and the coil support is fixedly connected to the coil through the bolt and nut assemblies.
[0013] Compared with the prior art, the beneficial effects of the present invention are:
[0014] When the utility model is in use, the coil bracket, the magnet bracket and the magnetic conductor can be directly obtained by bending the sheet metal after cutting, which is convenient to process and the size can be customized at will, which can greatly reduce the processing time and processing cost.
[0015] When the utility model is in use, the height dimensions of the coil bracket and the magnet bracket can be arbitrarily adjusted according to design requirements when bending, which facilitates adjustment of the center of gravity of the coil assembly and the magnet assembly as a whole, and makes it easier to achieve balancing of the coil magnet, thereby improving the vibration stability of the measuring tube and the performance of the flow meter.
[0016] When the utility model is in use, the arc size of the arc cutting part of the coil bracket and the magnet bracket is consistent with the outer diameter of the measuring tube. During assembly, they can fit tightly with the measuring tube, which is convenient for welding. The size of the arc cutting part can be adjusted according to measuring tubes with different outer diameters, and the utility model has strong customizability.
[0017] When the utility model is in use, a welding tool is used when welding the coil bracket and the magnet bracket, so that the relative position of the coil bracket and the magnet bracket can be determined, thereby determining the relative position of the coil and the magnet, and the concentricity of the coil and the magnet can be well guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0019] Figure 2 This is a schematic diagram of the installation of the magnet and coil of the utility model;
[0020] Figure 3 This is a schematic diagram of the connection structure of the magnet assembly of the present utility model;
[0021] Figure 4 This is a schematic diagram of the coil support and coil connection structure of the utility model.
[0022] In the figure: 1. Measuring tube; 2. Magnetic conductor; 3. Magnet collar; 4. Magnet; 5. Coil holder; 6. Coil; 7. Bolt and nut assembly; 8. Magnet holder. DETAILED DESCRIPTION
[0023] Below, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.
[0024] Example 1: Please refer to Figure 1 - Figure 4 The coil magnet fixing structure of a flowmeter of this embodiment includes two measuring tubes 1. A magnet holder 8 is fixedly connected to the outside of one measuring tube 1. A magnet assembly is fixedly connected to one side of the magnet holder 8. The magnet assembly includes a magnetic conductor 2, a magnet collar 3, and a magnet 4. The inner side of the magnetic conductor 2 is fixedly connected to the magnet collar 3. One end of the magnet 4 is located inside the magnet collar 3. A coil holder 5 is fixedly connected to the outside of the other measuring tube 1. A coil 6 is fixedly connected to one side of the coil holder 5. The other end of the magnet 4 is located inside the coil 6.
[0025] Furthermore, since the arc size of the tangent arc of the magnet holder 8 and the coil holder 5 is the same as the outer diameter of the measuring tube 1, the magnet holder 8 and the coil holder 5 are respectively fixed to the inner sides of the outer parts of the two measuring tubes 1 by welding. The magnetizer 2 is soft iron and is fixed to one side of the magnet holder 8 by welding. The magnet collar 3 is fixed to the inner side of the magnetizer 2 by spot welding.
[0026] Among them, first use the welding tool to spot weld the magnet holder 8 and the coil holder 5 to the measuring tube 1, then weld the magnet ring 3 to the magnetizer 2, and at the same time embed the magnet 4 inside the magnet ring 3 so that the bottom of the magnet 4 is closely fitted with the surface of the magnetizer 2, and the other end of the magnet 4 is located inside the coil 6, and then put the magnet assembly and the coil 6 into the gap between the magnet holder 8 and the coil holder 5, and then use the bolt and nut assembly 7 to fix the coil 6 to the coil holder 5, and finally fit the edge of the magnetizer 2 to the magnet holder 8, and spot weld the magnet holder 8 and the magnetizer 2, so that the relative position of the coil 6 and the magnet 4 can be adjusted by adjusting the height of the coil holder 5 and the magnet holder 8, so as to facilitate the adjustment of the center of gravity of the coil 6 and the magnet 4 as a whole;
[0027] Furthermore, one end of the magnet 4 is magnetically connected to the magnetic conductor 2, and the magnet collar 3 is used to limit the radial displacement of the magnet 4. The magnet 4 relies on its own magnetic force to be adsorbed on the magnetic conductor 2, and the radial displacement of the magnet 4 is limited by the magnet collar 3. Therefore, the magnet 4 can be fixed without using glue, which is simple and convenient.
[0028] Furthermore, two through holes are processed at both ends of the coil bracket 5 and the coil 6, and a bolt and nut assembly 7 is arranged inside the through hole. The coil bracket 5 is fixedly connected to the coil 6 through the bolt and nut assembly 7. When cutting, holes can be opened at any position of the coil bracket 5 according to design requirements, which plays a role in reducing the weight of components and adjusting the center of gravity.
[0029] Working principle: The coil bracket 5, the magnet bracket 8, and the magnetizer 2 can be directly obtained by bending the sheet metal after blanking, which is convenient for processing. The height dimensions of the coil bracket 5 and the magnet bracket 8 can be adjusted arbitrarily according to design requirements during bending, which is convenient for adjusting the center of gravity of the coil 6 and the magnet 4 as a whole. At the same time, the arc dimensions of the arc-cutting parts of the coil bracket 5 and the magnet bracket 8 are consistent with the outer diameter of the measuring tube 1, and can fit tightly with the measuring tube during assembly, which is convenient for welding. During welding, the positions of the coil bracket 5 and the magnet bracket 8 are determined by the welding positioning tool, thereby determining the relative positions of the coil 6 and the magnet 4, which can well ensure the concentricity of the coil 6 and the magnet 4.
[0030] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.
Claims
1. A coil magnet fixing structure for a flow meter, comprising two measuring tubes (1), characterized in that: One side of the outer portion of one measuring tube (1) is fixedly connected to a magnet holder (8), one side of the magnet holder (8) is fixedly connected to a magnet assembly, the magnet assembly comprising a magnet conductor (2), a magnet collar (3) and a magnet (4), the inner side of the magnet conductor (2) is fixedly connected to the magnet collar (3), one end of the magnet (4) is located inside the magnet collar (3), and one side of the outer portion of the other measuring tube (1) is fixedly connected to a coil holder (5), one side of the coil holder (5) is fixedly connected to a coil (6), and the other end of the magnet (4) is located inside the coil (6).
2. The coil magnet fixing structure of a flow meter according to claim 1, characterized in that: The arc dimensions of the tangent arcs of the magnet support (8) and the coil support (5) are the same as the outer diameter of the measuring tube (1).
3. The coil magnet fixing structure of a flow meter according to claim 1, characterized in that: The magnet bracket (8) and the coil bracket (5) are respectively fixed to the inner sides of the exteriors of the two measuring tubes (1) by welding.
4. The coil magnet fixing structure of a flow meter according to claim 1, characterized in that: The magnetic conductor (2) is soft iron, and the magnetic conductor (2) is fixed to one side of the magnet bracket (8) by welding.
5. The coil magnet fixing structure of a flow meter according to claim 1, characterized in that: The magnet collar (3) is fixed to the inner side of the magnet conductor (2) by spot welding.
6. The coil magnet fixing structure of a flow meter according to claim 1, characterized in that: One end of the magnet (4) is magnetically connected to the magnet conductor (2), and the magnet collar (3) is used to limit the radial displacement of the magnet (4).
7. The coil magnet fixing structure of a flow meter according to claim 1, characterized in that: Two through holes are machined at both ends of the coil support (5) and the coil (6), and a bolt and nut assembly (7) is provided inside the through hole. The coil support (5) is fixedly connected to the coil (6) via the bolt and nut assembly (7).