An electromagnetic flowmeter

Abstract

An electromagnetic flowmeter comprises a converter table body and a sensor, two pre-installation mechanisms symmetrically arranged in the sensor; the pre-installation mechanism comprises an insulating half-ring plate for surrounding the outside of a measuring tube, the inner wall of the insulating half-ring plate is provided with two groups of symmetric baffle assemblies for limiting the installation position of an electromagnetic coil and isolating the electromagnetic coil from the inner wall of the insulating half-ring plate; two docking half-rings for the electrodes outside the measuring tube to pass through are symmetrically arranged on the two sides of the insulating half-ring plate, one end of the docking half-ring is fixed to the inner wall of the insulating half-ring, and a half-arc notch in communication with the docking half-ring is formed in the insulating half-ring. The application is used to solve the problems that the vertical symmetry of the coil is difficult to guarantee during the assembly of the electromagnetic flowmeter and the insulating inner lining and the circuit are easily damaged by welding.

Description

Technical Field

[0001] This utility model belongs to the technical field of electromagnetic flowmeters, and specifically relates to an electromagnetic flowmeter. Background Technology

[0002] An electromagnetic flowmeter is a flow measurement instrument based on Faraday's law of electromagnetic induction, primarily used for monitoring the flow of conductive liquids. Its core consists of two parts: a sensor and a converter, which work together to convert flow rate into an electrical signal.

[0003] Existing electromagnetic coils are all assembled using modular parts. However, when assembling electromagnetic coils, the upper and lower coils need to be vertically symmetrical, so the position of the coils needs to be repeatedly adjusted during installation, which makes assembly troublesome. In addition, an insulating liner is usually required to be installed outside the electromagnetic coil. When connecting the wires, the wires are directly stuffed into the outer casing. Furthermore, the insulating liner and the wires are easily damaged when the outer casing is soldered. Utility Model Content

[0004] This invention provides an electromagnetic flowmeter to solve the problems in the prior art, such as the difficulty in ensuring the vertical symmetry of the coil during assembly and the susceptibility of the insulating lining and wiring to welding damage.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: An electromagnetic flowmeter, wherein two pre-installation mechanisms symmetrically arranged vertically are installed inside the sensor; The pre-installation mechanism includes an insulating semi-ring plate for surrounding the measuring tube. The inner wall of the insulating semi-ring plate is provided with two sets of symmetrical baffle assemblies. The baffle assemblies are used to limit the installation position of the electromagnetic coil and isolate the electromagnetic coil from the inner wall of the insulating semi-ring plate. Two docking half-rings are symmetrically arranged on both sides of the insulating half-ring plate for the external electrodes of the measuring tube to pass through. One end of the docking half-ring is fixed to the inner wall of the insulating half-ring, and a semi-arc notch communicating with the docking half-ring is provided on the insulating half-ring.

[0006] Furthermore, the baffle assembly includes a plurality of bent plates spaced apart circumferentially around the insulating semi-ring plate. The same number of bent plates in the two sets of baffle assemblies are symmetrically bent to fit against the inner wall of the insulating semi-ring plate, forming a groove area for accommodating the electromagnetic coil.

[0007] Furthermore, when the bent plate is bent to fit against the inner wall of the insulating semi-ring, one bent plate partially overlaps with the surface of the adjacent bent plate.

[0008] Furthermore, the area of ​​the bent plate near the inner wall of the insulating semi-ring plate is thinner than other areas.

[0009] Furthermore, one end of the docking half-ring is fixedly connected to the inner wall of the insulating half-ring plate, and the other end is used to fit against the outer wall of the measuring tube. The inner wall of the docking half-ring fits against the periphery of the electrode.

[0010] Furthermore, the measuring tube is fitted with side rings near both ends, and the insulating half-ring plate is provided with insulating side half-rings at both ends; after the sensor is installed, the insulating side half-rings and the side rings are attached to each other.

[0011] Furthermore, the end faces of the mating half-ring and the insulating half-ring plate are flush; the flat end face of the insulating side half-ring is serrated, and the serrated surfaces of the two pre-installation mechanisms can be joined together.

[0012] Furthermore, a plurality of wire-guiding semi-ring guide plates are provided between the two insulating side semi-rings. The inner wall of the wire-guiding semi-ring guide plate is fixed to the outer wall of the insulating semi-ring plate, and the area between the wire-guiding semi-ring guide plates is used for wire management.

[0013] Furthermore, the bottom of the insulating semi-ring plate is provided with a docking hole, the plane of which is set is perpendicular to the plane of which is set in the semi-arc notch, and the two wire-guiding semi-ring guide plates are set on both sides of the semi-arc notch and the docking hole.

[0014] Furthermore, the sensor also includes a top housing and a bottom housing surrounding the two pre-installed mechanisms, with a connecting tube disposed above the top housing, the connecting tube being aligned with the area between the two cable management semi-circular guide plates.

[0015] The present invention can achieve the following beneficial effects: 1. This utility model provides an installation foundation for the baffle assembly and docking half-ring by setting a pre-installation mechanism inside the sensor. The baffle assembly solves the problem of electromagnetic coil installation, and the docking half-ring solves the problem of electrode installation and positioning, thereby making the assembly accuracy of the electromagnetic flowmeter higher and the installation efficiency higher.

[0016] 2. This utility model utilizes the bendable characteristics of the bending plate to form a recessed area that adapts to the shape of the electromagnetic coil during assembly. This ensures the vertical symmetry of the upper and lower coils without repeated adjustments, significantly improving assembly efficiency and enabling rapid positioning and symmetrical installation of the electromagnetic coil. Meanwhile, the unbent bending plate can isolate the electromagnetic coil and the electrode, improving the accuracy of electrode sensing.

[0017] 3. The synergistic cooperation between the cable management half-ring guide plate and the insulating half-ring of this utility model guides the connecting wires to the protected area; at the same time, the sawtooth cross-section of the insulating half-ring enhances the sealing performance, effectively isolating heat from damaging the internal circuitry and insulating lining when welding the bottom and top shells. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a three-dimensional view of an electromagnetic flowmeter according to the present invention; Figure 2 This is an exploded structural diagram illustrating the internal structure of the sensor used in this invention. Figure 3 for Figure 2 Cross-sectional view of section AA after the electromagnetic flowmeter is installed; Figure 4 This is a partial structural diagram of the pre-installation mechanism of this utility model before installation; Figure 5 This is a partial structural diagram of the pre-installation mechanism of this utility model after installation.

[0019] The attached diagram lists the components represented by each number as follows: 1. Converter body; Sensor: 2. Measuring tube; 3. Flange; 4. Side ring; 5. Bottom housing; 6. Top housing; 7. Connecting tube; 8. Through hole; 9. Electromagnetic coil; 10. Electrode; Pre-installation mechanism: 11. Insulating half-ring plate; 12. Semi-arc notch; 13. Butt joint half-ring; 14. Insulating side half-ring; 15. Cable management half-ring guide plate; 16. Bending plate; 17. Butt joint hole. Detailed Implementation

[0020] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0021] like Figures 1 to 5 As shown, an electromagnetic flowmeter includes a converter body 1 and a sensor; the sensor includes a measuring tube 2, a flange 3, a side ring 4, a bottom housing 5, a top housing 6, a connecting tube 7, an electromagnetic coil 9, and an electrode 10, and two symmetrical pre-installation mechanisms are installed inside the sensor.

[0022] The pre-installation mechanism includes an insulating semi-ring plate 11, two mating semi-rings 13, two insulating side semi-rings 14, and two cable management semi-ring guide plates 15. The insulating semi-ring plate 11 is provided with two sets of symmetrical baffle assemblies. The baffle assembly includes four bent plates 16, which are fixedly connected to the inner wall of the insulating semi-ring plate 11.

[0023] The converter body 1 and the sensor constitute a modularly assembled electromagnetic flowmeter in the prior art; the pre-installation mechanism is made of an integrated insulating material and a high-temperature resistant material, and the pre-installation mechanism is modularly produced by molding.

[0024] In a further embodiment, the upper end of the insulating semi-ring plate 11 has two semi-circular notches 12, and the mating semi-ring 13 is fixed to the periphery of the semi-circular notches 12, with the inner wall of the mating semi-ring 13 being coplanar with the surface of the semi-circular notches 12. Two insulating side semi-rings 14 are fixedly connected to both ends of the insulating semi-ring plate 11.

[0025] In this embodiment, the planar cross-section and inner side of the insulating half-ring 14 in a single pre-installation mechanism are serrated, thereby increasing the contact surface when connected with the insulating half-ring 14 of another pre-installation mechanism by adhesive, and thus making the connection more secure.

[0026] In a further embodiment, one end of the docking half-ring 13 is fixedly connected to the inner side of the insulating half-ring plate 11, and the other end is attached to the outer periphery of the measuring tube 2. The inner wall of the docking half-ring 13 fits the outer periphery of the electrode 10.

[0027] In this embodiment, when a single pre-installed mechanism is connected to the periphery of the measuring tube 2, it can be positioned by the already installed electrode 10, so that the electrode 10 is located inside the semi-arc notch 12 and the docking semi-ring 13, thereby allowing the two pre-installed mechanisms to be vertically symmetrical, and thus allowing the electromagnetic coil 9 to be vertically symmetrical as well. At this time, there is a gap between the insulating side semi-ring 14 and the side ring 4, so when welding the side ring 4, the bottom shell 5 and the top shell 6, heat cannot be transferred to the inner side of the wire-reaming semi-ring guide plate 15.

[0028] In a further embodiment, the bottom of the insulating semi-ring plate 11 is provided with a docking hole 17, the docking hole 17 and the semi-arc notch 12 are on the same vertical plane, and two wire-guiding semi-ring guide plates 15 are fixedly connected to the periphery of the insulating semi-ring plate 11, and the two wire-guiding semi-ring guide plates 15 are located outside the semi-arc notch 12 and the docking hole 17.

[0029] In this embodiment, after the two pre-installation mechanisms are symmetrically bonded together, the wire-guiding semi-circular guide plate 15 forms a ring shape, and the area between two adjacent wire-guiding semi-circular guide plates 15 forms a wire-guiding groove. Typically, the electromagnetic flowmeter is equipped with a connecting wire for connecting the electrode 10 and the electromagnetic coil 9. After the connecting wire passes through the docking hole 17, it can be organized and stored around the wire-guiding groove, and finally passes through the pre-installation mechanism.

[0030] In a further embodiment, the bending plate 16 is bent at the fixed connection point with the insulating semi-ring plate 11 to position the electromagnetic coil 9. In this embodiment, the thickness at the fixed connection point between the bending plate 16 and the insulating semi-ring plate 11 is thinner, making the connection point easier to bend. Symmetrically bending the bending plate 16 in the left and right baffle assemblies can form a recessed area, which can fit the electromagnetic coil 9, thereby enabling rapid positioning.

[0031] In a further embodiment, flange 3 and side ring 4 are located at both ends of measuring tube 2 and are both welded, top shell 6 and bottom shell 5 are located on the upper and lower sides of measuring tube 2, and the ends of bottom shell 5 and top shell 6 are welded to the outer extension of side ring 4.

[0032] In a further embodiment, a connecting tube 7 is welded to the top of the top shell 6. A through hole 8 is provided in the middle of the connecting tube 7. The through hole 8 is aligned with the area between the two cable management semi-circular guide plates 15. The top end of the connecting tube 7 is connected to the converter body 1 by bolts. The connecting cable, after being arranged around the cable management groove, can pass through the through hole 8 into the converter body 1.

[0033] In this embodiment, the top outer shell 6 has one more hole than the bottom outer shell 5 for welding the connecting tube 7; the sensors are all produced by modular metal molding, and the two symmetrical electromagnetic coils 9 can generate a magnetic field after being powered on. The induced electromotive force generated when the conductive fluid passes through the measuring tube 2 can be captured by the electrode 10 and fed back to the converter body 1.

[0034] The working principle of this utility model is as follows: When assembling the modular electromagnetic flowmeter, side rings 4 and flanges 3 are welded to both ends of the measuring tube 2. Then, the electromagnetic coil 9 and electrode 10 are installed between the two side rings 4. The connecting wire is then passed through the through hole 8 to connect to the converter body 1. Finally, the bottom shell 5 and the top shell 6 are merged and welded to the side rings 4 at both ends, and the converter body 1 is installed.

[0035] When installing the electromagnetic coil 9 and the electrode 10, the electrode 10 can be installed first. Then, the bending plate 16 in the pre-installation mechanism is bent towards the center of the mating hole 17 at the center of the insulating semi-ring plate 11, according to the width of the electromagnetic coil 9. This causes the bending plate 16 to fit against the inner side of the insulating semi-ring plate 11, forming a stacked insulating liner. The bent and unbent bending plates 16 constitute a groove area for adapting to the electromagnetic coil 9. See details... Figure 3 and Figure 5 The effect shown is that two symmetrical electromagnetic coils 9 can be quickly installed within two pre-installed mechanisms, thus simplifying installation without the need for repeated adjustments.

[0036] The unbent portion can serve as an insulating strip, thereby reducing interference between the electromagnetic coil 9 and the electrode 10, allowing the electrode 10 to focus on processing the induced electromotive force generated when the conductive fluid flows inside the measuring tube 2, thus increasing accuracy.

[0037] After the two pre-installation mechanisms complete the positioning and installation of the electromagnetic coil 9, the connecting wire can be pulled out from the docking hole 17 to between the two wire-management semi-ring guide plates 15. Then, the two pre-installation mechanisms are symmetrically inserted into the outside of the measuring tube 2. When inserted, the docking semi-ring 13 will contact the outer periphery of the electrode 10. Finally, the joints of the two insulating side semi-rings 14 and the joints between the two insulating side semi-rings 14 and the measuring tube 2 are sealed with sealant. At this time, part of the connecting wire is between the two wire-management semi-ring guide plates 15, and part of the connecting wire passes through the through hole 8 and connects to the inside of the converter body 1. Therefore, when the bottom shell 5 and the top shell 6 are welded to the side ring 4, heat can be avoided from contacting the electromagnetic coil 9, the electrode 10, and the connecting wire. Thus, the electromagnetic coil 9, the electrode 10, and the connecting wire can be protected, and the connecting wire can be managed.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electromagnetic flowmeter, comprising a converter body (1) and a sensor, characterized in that, The sensor is equipped with two pre-installation mechanisms that are symmetrically positioned vertically. The pre-installation mechanism includes an insulating semi-ring plate (11) for surrounding the measuring tube (2). The inner wall of the insulating semi-ring plate (11) is provided with two sets of symmetrical baffle assemblies. The baffle assemblies are used to limit the installation position of the electromagnetic coil (9) and isolate the electromagnetic coil (9) from the inner wall of the insulating semi-ring plate (11). Two docking half-rings (13) are symmetrically arranged on both sides of the insulating half-ring plate (11) for the external electrode (10) of the measuring tube (2) to pass through. One end of the docking half-ring (13) is fixed to the inner wall of the insulating half-ring, and a semi-arc notch (12) communicating with the docking half-ring (13) is opened on the insulating half-ring.

2. The electromagnetic flowmeter according to claim 1, characterized in that: The baffle assembly includes a plurality of bent plates (16) spaced apart around the insulating semi-ring plate (11) in a circumferential manner. The same number of bent plates (16) in the two sets of baffle assemblies are symmetrically bent to fit against the inner wall of the insulating semi-ring plate (11) to form a groove area for accommodating the electromagnetic coil (9).

3. An electromagnetic flowmeter according to claim 1, characterized in that: When the bent plate (16) is bent to fit against the inner wall of the insulating half ring, one bent plate (16) partially overlaps the surface of the adjacent bent plate (16).

4. An electromagnetic flowmeter according to claim 2, characterized in that: The area of ​​the bent plate (16) near the inner wall of the insulating semi-ring plate (11) is thinner than other areas.

5. An electromagnetic flowmeter according to claim 1, characterized in that: One end of the docking half-ring (13) is fixedly connected to the inner wall of the insulating half-ring plate (11), and the other end is used to fit against the outer wall of the measuring tube (2). The inner wall of the docking half-ring (13) fits against the periphery of the electrode (10).

6. An electromagnetic flowmeter according to claim 1, characterized in that: The measuring tube (2) is fitted with side rings (4) near both ends, and the insulating half-ring plate (11) is provided with insulating side half-rings (14) at both ends; after the sensor is installed, the insulating side half-rings (14) and the side rings (4) are attached to each other.

7. An electromagnetic flowmeter according to claim 6, characterized in that: The end faces of the docking half-ring (13) and the insulating half-ring plate (11) are flush; The flat end face of the insulating side half ring (14) is serrated, and the serrated surfaces of the two pre-installed mechanisms can be joined together.

8. An electromagnetic flowmeter according to claim 7, characterized in that: A plurality of wire-guiding semi-ring guide plates (15) are also provided between the two insulating side semi-rings (14). The inner wall of the wire-guiding semi-ring guide plate (15) is fixed to the outer wall of the insulating semi-ring plate (11). The area between the wire-guiding semi-ring guide plates (15) is used for wire management.

9. An electromagnetic flowmeter according to claim 8, characterized in that: The bottom of the insulating semi-ring plate (11) is provided with a docking hole (17). The plane of the docking hole (17) is perpendicular to the plane of the semi-arc notch (12). Two wire-guiding semi-ring guide plates (15) are provided on both sides of the semi-arc notch (12) and the docking hole (17).

10. An electromagnetic flowmeter according to claim 8, characterized in that: The sensor also includes a top housing (6) and a bottom housing (5) surrounding the two pre-installed mechanisms, with a connecting tube (7) disposed above the top housing (6) and the connecting tube (7) aligned with the area between the two cable management semi-circular guide plates (15).

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