Electromagnetic flowmeter

Abstract

The utility model relates to the technical field of flow meters, in particular to an electromagnetic flow meter which comprises a sensor and a converter, the sensor comprises a measuring guide pipe and a lining embedded in the inner wall of the measuring guide pipe, and the two ends of the measuring guide pipe are respectively provided with a flange plate. The two ends of the lining extend to the end faces of the two flange plates along the inner wall of the measuring guide pipe, a flow channel is further formed in the lining, the measuring guide pipe comprises an upper pipe body and a lower pipe body which are symmetrical along the axis of the flow channel, and the upper pipe body and the lower pipe body are buckled to form a mounting channel allowing the lining to be embedded therein. The upper pipe body and the lower pipe body are buckled, the upper pipe body and the lower pipe body are detachably connected through at least two sets of connecting assemblies, and the two sets of connecting assemblies are arranged at the buckling positions of the two sides of the upper pipe body and the two sides of the lower pipe body respectively. And the lining is arranged between the upper pipe body and the lower pipe body, so that the lining is convenient to disassemble and independently replace, and the maintenance cost is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of flow meter technology, and in particular to an electromagnetic flow meter. Background Technology

[0002] Electromagnetic flow meters are a new type of flow measurement instrument that developed rapidly in the 1950s and 1960s with the advancement of electronic technology. An electromagnetic flow meter is an instrument that uses the principle of electromagnetic induction to measure the flow rate of a conductive fluid based on the electromotive force induced when the fluid passes through an external magnetic field.

[0003] The structure of an electromagnetic flowmeter mainly consists of a magnetic circuit system, a measuring conduit, electrodes, a housing, a lining, and a converter. To prevent corrosion of the measuring conduit, a complete electrically insulating lining is installed on the inner side of the measuring conduit and the flange sealing surface. Since the conductive fluid comes into direct contact with the lining, the lining is usually made of corrosion-resistant and high-temperature-resistant polytetrafluoroethylene (PTFE). The lining of existing electromagnetic flowmeters is usually manufactured using a casting process. After molding, the lining is embedded inside the measuring conduit to form a fixed connection. If the lining is damaged, it is not easy to disassemble or replace it individually, resulting in high maintenance costs.

[0004] The purpose of this invention is to propose corresponding solutions to the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide an electromagnetic flowmeter. The measuring guide tube of this invention adopts a split structure, with the upper tube body and the lower tube body fastened together and then detachably connected by a connecting component. The liner is set between the upper tube body and the lower tube body, which facilitates disassembly and individual replacement of the liner, greatly reducing maintenance costs.

[0006] The technical solution adopted by this utility model is as follows: an electromagnetic flowmeter, including a sensor and a converter, wherein the sensor includes a measuring conduit and a lining embedded in the inner wall of the measuring conduit, wherein a flange is provided at each end of the measuring conduit, and both ends of the lining extend along the inner wall of the measuring conduit to the end faces of the two flanges, and a flow channel is provided inside the lining; the measuring conduit includes an upper tube body and a lower tube body symmetrically arranged along the axis of the flow channel, wherein the upper tube body and the lower tube body are interlocked to form an installation channel for the lining to be embedded, and the upper tube body and the lower tube body are detachably connected by at least two sets of connecting components, wherein the two sets of connecting components are respectively provided at the interlocking points on both sides of the upper tube body and the lower tube body.

[0007] The upper tube body is provided with at least two first protrusions, and the lower tube body is provided with at least two second protrusions. The connecting assembly includes a rotating rod, the two ends of which are detachably connected to the upper tube body and the lower tube body, and the rotating rod passes through the first protrusion and the second protrusion simultaneously.

[0008] Both the first and second protrusions have U-shaped grooves for the center of the rotating rod to be embedded. The connecting assembly also includes a pin and a locking component. One end of the rotating rod is rotatably connected to the pin, and the other end is fixedly connected to the locking component.

[0009] When the pin is set on the lower tube, the locking member is connected to the upper tube; when the pin is set on the upper tube, the locking member is connected to the lower tube.

[0010] The lower tube is provided with a mounting seat, and the pin passes through the mounting seat and the rotating rod in sequence, with a nut threaded into each end of the pin.

[0011] The rotating rod is provided with a connecting ring for mounting a locking component. The connecting assembly also includes a sleeve, an elastic element, and a fixing ring that are sleeved on the rotating rod. The sleeve and the elastic element are slidably engaged with the rotating rod, and the fixing ring is threadedly engaged with the rotating rod. When the rotating rod is simultaneously embedded in the U-shaped grooves on the first protrusion and the second protrusion, the first protrusion and the second protrusion are simultaneously sandwiched between the sleeve and the fixing ring, and the elastic element is abutted between the connecting ring and the sleeve.

[0012] The sleeve has an annular groove for the elastic element to be inserted.

[0013] The sleeve extends with an extension section, which sequentially extends into the U-shaped grooves on the first protrusion and the second protrusion.

[0014] The beneficial effects of this utility model are as follows: This utility model designs the measuring conduit as an upper tube body and a lower tube body symmetrical along the flow channel axis, and achieves a detachable connection through a connecting component. When the connecting component is locked, the upper tube body and the lower tube body are relatively fixed. When the connecting component is unlocked, the upper tube body can be completely separated from the lower tube body. When the lining is damaged, the measuring conduit can be quickly disassembled, and the lining can be easily replaced individually. Because the lining extends to the sealing surface of the flange to ensure complete coverage, it cannot be directly removed. This avoids the problem of needing to replace the entire measuring conduit or complex maintenance in the prior art, significantly reducing maintenance costs and time. Furthermore, this detachable structure does not affect the fluid flow in the flow channel, ensuring the stability of the fluid flow. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0016] Figure 1 This is a schematic diagram of the structure of the electromagnetic flowmeter of this utility model;

[0017] Figure 2 This is a cross-sectional schematic diagram of the sensor in this utility model;

[0018] Figure 3 This is a cross-sectional view of the connecting component.

[0019] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle;

[0020] In the figure, 1-sensor, 2-converter, 3-measuring conduit, 4-lining, 5-flange, 6-flow channel, 7-upper tube body, 8-lower tube body, 9-installation channel, 10-first protrusion, 11-second protrusion, 12-rotating rod, 13-U-groove, 14-pin, 15-locking element, 16-mounting seat, 17-nut, 18-connecting ring, 19-sleeve, 20-elastic element, 21-fixing ring, 22-ring groove, 23-extension section. Detailed Implementation

[0021] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0022] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0023] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0024] like Figures 1 to 4As shown, this is an embodiment of the present invention. The electromagnetic flowmeter includes a sensor 1 and a converter 2. The sensor 1 includes a measuring conduit 3 and a liner 4 embedded in the inner wall of the measuring conduit 3. A flange 5 is provided at each end of the measuring conduit 3. The two ends of the liner 4 extend along the inner wall of the measuring conduit 3 to the end faces of the two flanges 5. The liner 4 also has a flow channel 6 inside. The measuring conduit 3 includes an upper tube body 7 and a lower tube body 8 symmetrically arranged along the axis of the flow channel 6. The upper tube body 7 and the lower tube body 8 are interlocked to form an installation channel 9 for the liner 4 to be embedded. The upper tube body 7 and the lower tube body 8 are detachably connected by at least two sets of connecting components. The two sets of connecting components are respectively provided at the interlocking points on both sides of the upper tube body 7 and the lower tube body 8.

[0025] The beneficial effects of this design are as follows: This utility model designs the measuring conduit as an upper and lower tube body symmetrical along the flow channel axis, and achieves a detachable connection through a connecting component. When the connecting component is locked, the upper and lower tube bodies are relatively fixed. When the connecting component is unlocked, the upper and lower tube bodies can be completely separated. When the lining is damaged, the measuring conduit can be quickly disassembled, and the lining can be easily replaced individually. Because the lining extends to the sealing surface of the flange to ensure complete coverage, it cannot be directly removed. This avoids the problem of needing to replace the entire measuring conduit or complex maintenance in the prior art, significantly reducing maintenance costs and time. Furthermore, this detachable structure does not affect the fluid flow in the flow channel, ensuring the stability of the fluid flow.

[0026] Further configuration: the upper tube 7 is provided with at least two first protrusions 10, the lower tube 8 is provided with at least two second protrusions 11, and the connecting assembly includes a rotating rod 12. The two ends of the rotating rod 12 are detachably connected to the upper tube 7 and the lower tube 8, respectively, and the rotating rod 12 passes through the first protrusions 10 and the second protrusions 11 simultaneously.

[0027] The beneficial effects of this design are as follows: it refines the structure of the connecting components, and the first protrusion of the upper tube and the second protrusion of the lower tube are fixed relative to each other by a lockable rotating rod, forming a simple and convenient quick connection and locking mechanism. The rotating rod is not only reliable in connection but also easy to disassemble and assemble. The upper tube and the lower tube can also be quickly aligned through the first and second protrusions, which significantly simplifies the disassembly and assembly process.

[0028] Furthermore, both the first protrusion 10 and the second protrusion 11 are provided with U-shaped grooves 13 for the middle of the rotating rod 12 to be embedded. The connecting assembly also includes a pin 14 and a locking member 15. One end of the rotating rod 12 is rotatably connected to the pin 14 and the other end is fixedly connected to the locking member 15.

[0029] The advantages of this design are as follows: by rotatably connecting one end of the rotating rod to the pin and fixing the other end with a locking component, a highly efficient and quick-locking mechanism is formed. When fastening and fixing the upper and lower tube bodies, installation can be completed simply by inserting the rotating rod into the U-shaped groove and tightening the locking component. Unlocking does not require completely removing the rotating rod; simply loosen the locking component and then rotate the rotating rod around the pin to disengage it from the first and second protrusions. This effectively prevents the rotating rod from being completely removed and lost or misplaced. It also avoids the tedious operation of aligning the rotating rod through a shaft in confined spaces, further improving the convenience and reliability of assembly. In this embodiment, the locking component is a bolt that is readily available in the prior art.

[0030] Further configuration: when the pin 14 is mounted on the lower tube 8, the locking member 15 is connected to the upper tube 7; when the pin 14 is mounted on the upper tube 7, the locking member 15 is connected to the lower tube 8.

[0031] The beneficial effects of this design are as follows: the rotating rod can be mounted on either the upper or lower tube body. Regardless of whether the pin is specifically installed on the upper or lower tube body, its cooperation with the opposite locking component can ensure that the locking force acts directly on the tube body's fastening surface.

[0032] Further, the lower tube body 8 is provided with a mounting base 16, and the pin 14 passes through the mounting base 16 and the rotating rod 12 in sequence, and a nut 17 is threaded into each end of the pin 14.

[0033] The beneficial effects of this design are as follows: Through the cooperation of the mounting base and the double-nut locking mechanism, the pin connection achieves ultimate stability and high reliability. The mounting base provides a robust support foundation for the pin, effectively distributing the stress at the connection point. This completely avoids the risk of axial movement or even detachment of the pin during long-term operation or severe vibration, greatly improving the safety and service life of the entire quick-connect mechanism. Furthermore, while ensuring extremely high reliability, this structure does not increase assembly complexity; maintenance only requires tightening or loosening the nuts with common tools, maintaining excellent maintainability.

[0034] Further, the rotating rod 12 is provided with a connecting ring 18 for mounting the locking member 15. The connecting assembly also includes a sleeve 19, an elastic member 20, and a fixing ring 21 that are sleeved on the rotating rod 12. The sleeve 19 and the elastic member 20 are slidably engaged with the rotating rod 12, and the fixing ring 21 is threadedly engaged with the rotating rod 12. When the rotating rod 12 is simultaneously embedded in the U-shaped groove 13 on the first protrusion 10 and the second protrusion 11, the first protrusion 10 and the second protrusion 11 are simultaneously sandwiched between the sleeve 19 and the fixing ring 21, and the elastic member 20 is abutted between the connecting ring 18 and the sleeve 19.

[0035] The beneficial effects of this design are as follows: the sleeve and retaining ring allow for a tighter and more secure clamping of the first and second protrusions. In this embodiment, the elastic element is a readily available spring, compressed between the connecting ring and the sleeve. Its elastic force continuously acts on the protrusion through the sleeve, providing an automatically adaptable and self-adjusting clamping force for the entire connection. This effectively compensates for minor gaps caused by temperature changes or wear, ensuring long-term stability and preventing loosening. The introduction of the elastic element transforms the connection structure from rigid to elastic support. When the piping system experiences vibration or pressure pulsation, this elastic structure effectively absorbs and buffers impact energy, significantly reducing the impact of vibration on the locking state and measurement accuracy, and improving the reliability of the equipment under harsh conditions. Both the sleeve and retaining ring can slide to accommodate protrusions of various thicknesses and can be easily loosened during disassembly without getting stuck on the protrusion.

[0036] Furthermore, the sleeve 19 is provided with an annular groove 22 for the elastic element 20 to be inserted.

[0037] The beneficial effects of this design are as follows: the annular groove effectively limits the spring, preventing it from slipping or becoming misaligned.

[0038] Furthermore, the sleeve 19 extends with an extension section 23, which sequentially extends into the U-shaped grooves 13 on the first protrusion 10 and the second protrusion 11.

[0039] The beneficial effects of this design are as follows: the extension section enables rapid alignment of the first and second protrusions, preventing slippage and misalignment during the installation of the upper and lower pipe bodies.

[0040] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An electromagnetic flowmeter, comprising a sensor (1) and a converter (2), wherein the sensor (1) comprises a measuring conduit (3) and a liner (4) embedded in the inner wall of the measuring conduit (3), wherein a flange (5) is provided at each end of the measuring conduit (3), and both ends of the liner (4) extend along the inner wall of the measuring conduit (3) to the end faces of the two flanges (5), and a flow channel (6) is provided inside the liner (4), characterized in that: The measuring conduit (3) includes an upper tube (7) and a lower tube (8) symmetrical along the axis of the flow channel (6). The upper tube (7) and the lower tube (8) are interlocked to form an installation channel (9) for the lining (4) to be embedded. The upper tube (7) and the lower tube (8) are also detachably connected by at least two sets of connecting components. The two sets of connecting components are respectively located at the interlocking points on both sides of the upper tube (7) and the lower tube (8).

2. The electromagnetic flowmeter according to claim 1, characterized in that: The upper tube (7) is provided with at least two first protrusions (10), and the lower tube (8) is provided with at least two second protrusions (11). The connecting assembly includes a rotating rod (12), the two ends of which are detachably connected to the upper tube (7) and the lower tube (8), and the rotating rod (12) passes through the first protrusion (10) and the second protrusion (11) at the same time.

3. The electromagnetic flowmeter according to claim 2, characterized in that: Both the first protrusion (10) and the second protrusion (11) are provided with U-shaped grooves (13) for the middle of the rotating rod (12) to be embedded. The connecting assembly also includes a pin (14) and a locking member (15). One end of the rotating rod (12) is rotatably connected to the pin (14) and the other end is fixedly connected to the locking member (15).

4. The electromagnetic flowmeter according to claim 3, characterized in that: When the pin (14) is set on the lower tube (8), the locking member (15) is connected to the upper tube (7). When the pin (14) is set on the upper tube (7), the locking member (15) is connected to the lower tube (8).

5. The electromagnetic flowmeter according to claim 3, characterized in that: The lower tube body (8) is provided with a mounting seat (16), and the pin (14) passes through the mounting seat (16) and the rotating rod (12) in sequence, and a nut (17) is threaded into each end of the pin (14).

6. The electromagnetic flowmeter according to claim 3, characterized in that: The rotating rod (12) is provided with a connecting ring (18) for mounting the locking member (15). The connecting assembly also includes a sleeve (19), an elastic member (20), and a fixing ring (21) that are sleeved on the rotating rod (12). The sleeve (19) and the elastic member (20) are slidably engaged with the rotating rod (12). The fixing ring (21) is threadedly engaged with the rotating rod (12). When the rotating rod (12) is simultaneously embedded in the U-shaped groove (13) on the first protrusion (10) and the second protrusion (11), the first protrusion (10) and the second protrusion (11) are simultaneously sandwiched between the sleeve (19) and the fixing ring (21). The elastic member (20) is abutted between the connecting ring (18) and the sleeve (19).

7. The electromagnetic flowmeter according to claim 6, characterized in that: The sleeve (19) has an annular groove (22) for the elastic element (20) to be inserted.

8. The electromagnetic flowmeter according to claim 6, characterized in that: The sleeve (19) extends with an extension section (23), which extends into the U-shaped groove (13) on the first protrusion (10) and the second protrusion (11) in sequence.

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