Electromagnetic flowmeter

Abstract

The utility model relates to the technical field of fluid mechanics measurement, and discloses an electromagnetic flowmeter which comprises a bent pipe, an octagonal lining is fixedly connected to the interior of the bent pipe, reserved holes are formed in the left side and the right side of the interior of the octagonal lining, and a shell is fixedly connected to the outer wall of the front side of the bent pipe. Flat-top electrodes are fixedly connected to the left side and the right side of the interior of the shell, the adjacent ends of the two flat-top electrodes penetrate through the left side and the right side of the bent pipe and are slidably connected with the interiors of the corresponding reserved holes, a plurality of coils are fixedly connected to the inner wall of the shell at equal intervals, and a connecting pipe is fixedly connected to the top of the shell; the top of the connecting pipe is fixedly connected with a converter. According to the electromagnetic flowmeter, the flow velocity fluctuation is reduced by the conductive fluid flowing through the elbow and the octagonal lining, the flat-top electrode is in contact with the fluid through the preformed hole, and the flow field fluctuation near the electrode is reduced, so that the measurement precision of the electromagnetic flowmeter is remarkably improved, and the measurement error is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of fluid mechanics measurement technology, and in particular to an electromagnetic flowmeter. Background Technology

[0002] Electromagnetism is a physical phenomenon generated by the movement of electric charges, involving the interaction of electric and magnetic fields. The presence of electric charges generates an electric field, and when electric charges move in a directional manner, forming an electric current, a magnetic field is generated around them. This phenomenon of the interrelation and interdependence of electric and magnetic fields is collectively called electromagnetism. An electromagnetic flowmeter is an instrument that measures the volumetric flow rate of conductive liquids based on the law of electromagnetic induction. By measuring the magnitude of the induced electromotive force, the flow rate of the liquid can be calculated.

[0003] A search revealed Chinese patent publication number CN218673759U, which discloses an electromagnetic flowmeter. The electromagnetic flowmeter includes a conduit, a bushing, electrodes, and a pre-tightening assembly. The bushing is disposed on the inner wall of the conduit. The electrodes include a flange and a column. The flange is located inside the bushing, and the column passes through the bushing and the conduit. The pre-tightening assembly includes a first pre-tightening component, a second pre-tightening component, and an elastic element. The first pre-tightening component, the second pre-tightening component, and the elastic element are sleeved on the outside of the column. The first pre-tightening component has a first recess, and the second pre-tightening component has a second recess. The two pre-tightening components are arranged oppositely to form a receiving space, and the elastic element is located in the receiving space. Along the axial direction of the column, the first pre-tightening component and the second pre-tightening component are arranged oppositely and have a gap between their two end faces that are close to each other. The electromagnetic flowmeter of this application can solve the problem that the installer needs to repeatedly observe the degree of indentation of the bushing to determine whether the electrode is installed reliably, which is cumbersome and affects work efficiency. However, in actual use, the bushing of this application is fixed to the inner wall of the conduit. The conduit is a straight pipe and cannot slow down the fluid when it flows through, which will cause the fluid velocity to be too fast and cause the detection result to be deviated. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an electromagnetic flowmeter, which aims to improve the problem in the prior art where the straight pipe cannot slow down the fluid when it flows through, resulting in excessively fast fluid velocity and deviations in the detection results.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an electromagnetic flowmeter, comprising a bend, an octagonal liner fixedly connected inside the bend, pre-drilled holes on both the left and right sides of the octagonal liner, a housing fixedly connected to the front outer wall of the bend, flat-top electrodes fixedly connected to both the left and right sides of the housing, adjacent ends of two flat-top electrodes respectively penetrating the left and right sides of the bend and slidably connected to the interior of the corresponding pre-drilled holes, multiple coils fixedly connected at equal intervals to the inner wall of the housing, a connecting pipe fixedly connected to the top of the housing, a converter fixedly connected to the top of the connecting pipe, a display screen fixedly connected to the front side of the converter, and connecting mechanisms provided at both ends of the bend.

[0006] Through the above technical solution: when the conductive fluid flows through the bend, the octagonal lining fixedly connected inside the bend significantly reduces the velocity fluctuation of the fluid in the measuring tube. Pre-drilled holes are provided on the left and right sides of the octagonal lining. Flat-top electrodes, fixedly connected to the left and right sides of the outer shell inside the front outer wall of the bend, have adjacent ends that penetrate the left and right sides of the bend and slide through the corresponding pre-drilled holes, reducing velocity fluctuations in the flow field near the electrodes and eliminating potential vortex generation, thereby improving measurement accuracy. Simultaneously, multiple coils equidistantly fixed on the inner wall of the outer shell generate a magnetic field when energized. The conductive fluid flowing in the magnetic field cuts the magnetic lines of force, thus generating an induced electromotive force between the two flat-top electrodes. The magnitude of this induced electromotive force is proportional to the fluid velocity. The generated induced electromotive force signal is transmitted to the converter at the top through the connecting pipe. The flow data processed by the converter is displayed intuitively on the screen, facilitating reading and recording by staff.

[0007] As a further description of the above technical solution:

[0008] The connecting mechanism includes two connecting rings, the interiors of which are fixedly connected to the outer walls of both ends of the bend. Multiple locking blocks are fixedly connected at equal intervals on one side of each of the two connecting rings. A connecting ring is provided on one side of each of the two connecting rings. Multiple slots are provided at equal intervals on one side of each of the two connecting rings. Multiple fixing bolts are rotatably connected at equal intervals on the outer walls of each of the two connecting rings. Fixing holes are provided on one side of each of the multiple locking blocks.

[0009] The above technical solution involves aligning the card block with the slot during installation. The card block is inserted into the slot, initially connecting the first connecting ring and the second connecting ring together, thus completing the initial positioning. After the card block is inserted into the slot, the fixing bolt is rotated to gradually screw it into the fixing hole on the card block. As the fixing bolt is continuously tightened, the connection between the first connecting ring and the second connecting ring is further tightened, thereby achieving a tight and stable connection.

[0010] As a further description of the above technical solution:

[0011] A fixing plate is fixedly connected to the right side of the outer casing, and an information board is fixedly connected to the front side of the fixing plate.

[0012] The above technical solution involves a fixed plate on the right side of the casing, which serves to install and support the information board. The information board displays important information about the electromagnetic flowmeter, allowing staff to quickly understand the basic information of the equipment.

[0013] As a further description of the above technical solution:

[0014] A protective cover is fixedly connected to the front outer wall of the converter, and a transparent plate is fixedly connected to the inner wall of the protective cover.

[0015] The above technical solution is mainly used to protect the converter and prevent external dust and moisture from damaging it and affecting its normal operation.

[0016] As a further description of the above technical solution:

[0017] Each of the fixing bolts has a washer slidably connected to its outer wall, and one side of each washer is respectively attached to the outer wall of the corresponding connecting ring.

[0018] Through the above technical solution: when the fixing bolt is tightened, one side of the washer fits against the outer wall of the connecting ring, which can increase the contact area between the fixing bolt and the connecting ring, disperse the pressure of the fixing bolt on the connecting ring, and avoid damage to the surface of the connecting ring due to pressure concentration.

[0019] As a further description of the above technical solution:

[0020] A sealing ring is fixedly connected to one side of each of the two connecting rings, and a sealing groove is provided on one side of each of the two connecting rings.

[0021] The above technical solution allows for the following: when connecting ring one and connecting ring two are connected, the sealing ring is embedded in the sealing groove to form a sealing structure, effectively preventing fluid leakage from the connection point.

[0022] As a further description of the above technical solution:

[0023] The converter is electrically connected to the flat-top electrodes, and the adjacent sides of the two flat-top electrodes are flush with the inner wall of the octagonal lining.

[0024] Through the above technical solution, the converter is electrically connected to the flat-top electrode, so that the induced electromotive force signal generated by the flat-top electrode can be transmitted to the converter for processing.

[0025] As a further description of the above technical solution:

[0026] One end of each of the multiple fixing bolts passes through the connecting ring and is rotatably connected inside the corresponding fixing hole, and the size of the fixing bolt and the fixing hole are matched.

[0027] The above technical solution can firmly connect connecting ring one and connecting ring two together, ensuring that the connection mechanism will not loosen during operation and guaranteeing the stable installation of the electromagnetic flowmeter in the pipeline system.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, the conductive fluid flows through the bend, the octagonal lining reduces the flow velocity fluctuation, the flat-top electrode contacts the fluid through the reserved hole and reduces the flow field fluctuation near the electrode, the coil is energized to generate a magnetic field, causing the fluid to cut the magnetic lines of force to generate an induced electromotive force, and the signal is transmitted to the converter for processing, which significantly improves the measurement accuracy of the electromagnetic flowmeter and effectively reduces the measurement error.

[0030] 2. In this utility model, by aligning the card block with the card slot and inserting it, the first connecting ring and the second connecting ring are initially connected and positioned. Then, the fixing bolt is rotated to screw it into the fixing hole on the card block. As the bolt is continuously tightened, the first connecting ring and the second connecting ring are further tightened, thus achieving a tight and stable connection of the connection mechanism. This effectively resists fluid impact and vibration, ensuring the stable installation of the electromagnetic flowmeter in the pipeline system. Attached Figure Description

[0031] Figure 1 This is a perspective view of an electromagnetic flowmeter proposed in this utility model;

[0032] Figure 2 This is a structural exploded view of an electromagnetic flowmeter proposed in this utility model;

[0033] Figure 3 This is an exploded view of the converter structure of an electromagnetic flowmeter proposed in this utility model;

[0034] Figure 4 This is a schematic diagram of the connecting ring structure of an electromagnetic flowmeter proposed in this utility model;

[0035] Figure 5 This is a schematic diagram of the connecting ring structure of an electromagnetic flowmeter proposed in this utility model.

[0036] Legend:

[0037] 1. Bend; 2. Connecting mechanism; 201. Connecting ring one; 202. Locking block; 203. Connecting ring two; 204. Locking groove; 205. Fixing bolt; 206. Fixing hole; 3. Octagonal lining; 4. Reserved hole; 5. Outer shell; 6. Flat top electrode; 7. Coil; 8. Connecting tube; 9. Converter; 10. Display screen; 11. Fixing plate; 12. Information board; 13. Protective cover; 14. Transparent plate; 15. Gasket; 16. Sealing ring; 17. Sealing groove. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Reference Figure 1 , Figure 2 and Figure 3 An embodiment of this utility model provides an electromagnetic flowmeter, including a bend 1, an octagonal liner 3 fixedly connected inside the bend 1, and reserved holes 4 on both the left and right sides of the octagonal liner 3. A shell 5 is fixedly connected to the front outer wall of the bend 1, and flat-top electrodes 6 are fixedly connected to both the left and right sides of the shell 5. The adjacent ends of the two flat-top electrodes 6 pass through the left and right sides of the bend 1 and are slidably connected to the interior of the corresponding reserved holes 4. Multiple coils 7 are fixedly connected at equal intervals to the inner wall of the shell 5. A connecting pipe 8 is fixedly connected to the top of the shell 5. A converter 9 is fixedly connected to the top of the connecting pipe 8. A display screen 10 is fixedly connected to the front side of the converter 9. A connecting mechanism 2 is provided at both ends of the bend 1. A fixing plate 11 is fixedly connected to the right side of the shell 5. An information plate 12 is fixedly connected to the front side of the fixing plate 11.

[0040] Specifically, when the conductive fluid flows through the bend 1, the octagonal lining 3 fixedly connected inside the bend 1 significantly reduces the velocity fluctuation of the fluid in the measuring tube. Pre-drilled holes 4 are provided on the left and right sides inside the octagonal lining 3. Flat-top electrodes 6, fixedly connected to the left and right sides inside the outer shell 5 fixedly connected to the front outer wall of the bend 1, have adjacent ends that penetrate the left and right sides of the bend 1 and slide through the corresponding pre-drilled holes 4, reducing velocity fluctuations in the flow field near the electrodes and eliminating potential vortex generation, thereby improving measurement accuracy. Simultaneously, multiple coils 7 equidistantly fixed on the inner wall of the outer shell 5 generate a magnetic field when energized. When a conductive fluid flows in a magnetic field, it cuts the magnetic lines of force, thereby generating an induced electromotive force between the two flat-top electrodes 6. The magnitude of this induced electromotive force is proportional to the fluid velocity. The generated induced electromotive force signal is transmitted to the converter 9 at the top through the connecting pipe 8. The flow data processed by the converter 9 is displayed intuitively on the display screen 10, making it convenient for staff to read and record. The fixing plate 11, which is fixedly connected to the right side of the outer casing 5, serves to install and support the information plate 12. The information plate 12 is marked with important information about the electromagnetic flowmeter, making it convenient for staff to quickly understand the basic situation of the equipment.

[0041] Reference Figure 4 and Figure 5 The connecting mechanism 2 includes two connecting rings 201. The interior of the two connecting rings 201 is fixedly connected to the outer walls of both ends of the bend 1. Multiple locking blocks 202 are fixedly connected at equal intervals on one side of the two connecting rings 201. A connecting ring 203 is provided on one side of each of the two connecting rings 201. Multiple slots 204 are provided at equal intervals on one side of each of the two connecting rings 203. Multiple fixing bolts 205 are rotatably connected at equal intervals on the outer wall of each of the two connecting rings 203. Fixing holes 206 are provided on one side of each of the multiple locking blocks 202. One end of each of the multiple fixing bolts 205 passes through the connecting ring 203 and is rotatably connected inside the corresponding fixing hole 206. The size of the fixing bolts 205 matches that of the fixing holes 206.

[0042] Specifically, during installation, the locking block 202 is aligned with the locking slot 204 and inserted. The locking block 202 is embedded in the locking slot 204, so that the connecting ring 1 201 and the connecting ring 203 are initially connected together, completing the initial positioning. After the locking block 202 is embedded in the locking slot 204, the fixing bolt 205 is rotated to gradually screw it into the fixing hole 206 on the locking block 202. As the fixing bolt 205 is continuously tightened, the connection between the connecting ring 1 201 and the connecting ring 203 is further tightened, thereby achieving a tight and stable connection. This ensures that the connecting ring 1 201 and the connecting ring 203 are firmly connected together, ensuring that the connecting mechanism 2 will not loosen during operation and guaranteeing the stable installation of the electromagnetic flowmeter in the pipeline system.

[0043] Reference Figure 1 , Figure 4 and Figure 5 A protective cover 13 is fixedly connected to the front outer wall of the converter 9. A transparent plate 14 is fixedly connected to the inner wall of the protective cover 13. A gasket 15 is slidably connected to the outer wall of multiple fixing bolts 205. One side of the multiple gaskets 15 is in contact with the outer wall of the connecting ring 1 201. A sealing ring 16 is fixedly connected to one side of the two connecting rings 1 201. A sealing groove 17 is opened on one side of each of the two connecting rings 203. The converter 9 is electrically connected to the flat-top electrode 6. The adjacent side of the two flat-top electrodes 6 is flush with the inner wall of the octagonal lining 3.

[0044] Specifically, it is mainly used to protect the converter 9 and prevent external dust and moisture from damaging the converter 9 and affecting its normal operation. When the fixing bolt 205 is tightened, one side of the gasket 15 is in contact with the outer wall of the connecting ring 201, which can increase the contact area between the fixing bolt 205 and the connecting ring 201, disperse the pressure of the fixing bolt 205 on the connecting ring 201, and avoid damage to the surface of the connecting ring 201 due to pressure concentration. When the connecting ring 201 and the connecting ring 203 are connected, the sealing ring 16 is embedded in the sealing groove 17 to form a sealing structure, which effectively prevents fluid from leaking from the connection part. The converter 9 is electrically connected to the flat-top electrode 6, so that the induced electromotive force signal generated by the flat-top electrode 6 can be transmitted to the converter 9 for processing.

[0045] Working principle: When the conductive fluid flows through the bend 1, the octagonal lining 3 fixedly connected inside the bend 1 significantly reduces the flow velocity fluctuation of the fluid in the measuring tube. The octagonal lining 3 has reserved holes 4 on the left and right sides. The flat-top electrodes 6 fixedly connected to the left and right sides of the outer shell 5 fixedly connected to the front outer wall of the bend 1 have their adjacent ends passing through the left and right sides of the bend 1 and slidingly connected to the corresponding reserved holes 4, which reduces the flow velocity fluctuation near the electrodes and eliminates the potential vortex generation, thereby improving the measurement accuracy. At the same time, multiple coils 7 fixed at equal intervals on the inner wall of the outer shell 5 will be energized to generate a magnetic field. The conductive fluid flows in the magnetic field and cuts the magnetic lines of force, thereby generating an induced electromotive force between the two flat-top electrodes 6. The magnitude of the induced electromotive force is proportional to the flow velocity of the fluid. The generated induced electromotive force signal is transmitted to the converter 9 at the top through the connecting pipe 8. The flow data processed by the converter 9 is displayed intuitively on the display screen 10, which is convenient for the staff to read and record.

[0046] During installation, the locking block 202 is aligned with the slot 204 and inserted. The locking block 202 is embedded in the slot 204, which initially connects the first connecting ring 201 and the second connecting ring 203, completing the initial positioning. After the locking block 202 is embedded in the slot 204, the fixing bolt 205 is rotated to gradually screw it into the fixing hole 206 on the locking block 202. As the fixing bolt 205 is continuously tightened, the connection between the first connecting ring 201 and the second connecting ring 203 is further tightened, thereby achieving a tight and stable connection.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 flow tube (1), characterised in that: The inside of the elbow pipe (1) is fixedly connected with an octagonal lining (3), the left and right sides of the inside of the octagonal lining (3) are provided with reserved holes (4), the front outer wall of the elbow pipe (1) is fixedly connected with a shell (5), the left and right sides of the inside of the shell (5) are fixedly connected with flat electrodes (6), the adjacent ends of the two flat electrodes (6) respectively penetrate the left and right sides of the elbow pipe (1) and are slidably connected with the inside of the corresponding reserved holes (4), the inner wall of the shell (5) is equidistantly fixedly connected with a plurality of coils (7), the top of the shell (5) is fixedly connected with a connecting pipe (8), the top of the connecting pipe (8) is fixedly connected with a converter (9), the front side of the converter (9) is fixedly connected with a display screen (10), and both ends of the elbow pipe (1) are provided with connecting mechanisms (2).

2. An electromagnetic flowmeter according to claim 1, characterised in that: The connecting mechanism (2) comprises two connecting rings one (201), the inner sides of the two connecting rings one (201) are fixedly connected to the outer walls of the two ends of the elbow pipe (1), a plurality of clamping blocks (202) are equidistantly fixedly connected to one side of each of the two connecting rings one (201), one side of each of the two connecting rings one (201) is provided with a connecting ring two (203), a plurality of clamping grooves (204) are equidistantly formed in one side of each of the two connecting ring two (203), a plurality of fixed bolts (205) are equidistantly rotatably connected to the outer walls of the two connecting ring two (203), and a fixed hole (206) is formed in one side of each of the plurality of clamping blocks (202).

3. An electromagnetic flowmeter according to claim 1, wherein: The right side of the shell (5) is fixedly connected with a fixed plate (11), and the front side of the fixed plate (11) is fixedly connected with an information board (12).

4. An electromagnetic flowmeter according to claim 1, wherein: The front outer wall of the converter (9) is fixedly connected with a protective cover (13), and the inner wall of the protective cover (13) is fixedly connected with a transparent plate (14).

5. An electromagnetic flowmeter according to claim 2, wherein: The outer walls of the plurality of fixed bolts (205) are slidably connected with gaskets (15), and one side of each of the plurality of gaskets (15) is attached to the outer wall of the corresponding connecting ring one (201).

6. An electromagnetic flowmeter according to claim 2, wherein: One side of each of the two connecting rings one (201) is fixedly connected with a sealing ring (16), and a sealing groove (17) is formed in one side of each of the two connecting ring two (203).

7. An electromagnetic flowmeter according to claim 1 wherein: The converter (9) is electrically connected with the flat electrodes (6), and the adjacent sides of the two flat electrodes (6) are flush with the inner wall of the octagonal lining (3).

8. An electromagnetic flowmeter according to claim 2, wherein: One end of each of the plurality of fixed bolts (205) penetrates the connecting ring two (203) and is rotatably connected in the corresponding fixed hole (206), and the size of the fixed bolt (205) matches the size of the fixed hole (206).

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