Electromagnetic liquid flowmeter

Abstract

The utility model discloses an electromagnetic fluid flowmeter, which belongs to the technical field of fluid flowmeters and comprises a converter and a sensor, a flange lining extending out of the sensor is fixedly mounted in the sensor, collecting pipes are arranged at two ends of the sensor, and each collecting pipe comprises a connecting pipe and a U-shaped pipe. According to the electromagnetic fluid flowmeter, the sensor connected into the pipeline through the flowmeter is communicated with the pipeline through the connecting pipe and the U-shaped pipe, and the ball valve is arranged to block the connecting pipe, so that fluid passes through the sensor after vertically climbing through the U-shaped pipe, and the fluid can be effectively continued when the flow is too small; the fluid passing through the sensor is enabled to fill the sensor without generating interference factors such as bubbles and the like, and meanwhile, the clamping and pressing part is arranged to perform clamping and pressing butt joint on the connecting pipe and the sensor, so that on one hand, the connecting pipe structure is convenient to disassemble, on the other hand, the sensor and the connecting pipe can be conveniently positioned and connected, and the practicability of the device is improved.

Description

Technical Field

[0001] This application relates to the field of liquid flow meters, and particularly to an electromagnetic liquid flow meter. Background Art

[0002] A liquid flow meter is a precision instrument used for measuring the flow rates of liquids, gases, and vapors in sealed pipelines. The principle of an electromagnetic liquid flow meter is that when a conductive liquid passes through the flange pipe of the liquid flow meter, an induced electromotive force is generated in the magnetic field within the flange pipe. Its magnitude is related to the flow velocity and conductivity of the liquid. According to the law of electromagnetic induction, it can be obtained that the induced electromotive force is proportional to the liquid flow velocity. By measuring the induced electromotive force, the liquid flow rate can be deduced.

[0003] An electromagnetic liquid flow meter mainly consists of the following parts: a measuring tube, usually a pipe made of non-magnetic material through which the liquid flows; electromagnetic coils installed outside the measuring tube to generate a constant magnetic field; electrodes installed on the inner wall of the measuring tube for measuring the induced voltage; and a signal processing unit that converts the measured voltage signal into flow data and performs display or output.

[0004] An electromagnetic liquid flow meter is connected to the pipeline through a flange for measuring the liquid flow rate. Due to the influence of fluid flow, the fluid may not be in a full-pipe state when passing through the flow meter, and there may be a situation where the fluid flow rate is too small. In this case, there are interference factors such as air bubbles in the pipeline, which will interfere with the normal measurement of the flow meter. For this reason, an electromagnetic liquid flow meter is proposed to solve the above-mentioned problems. Utility Model Content

[0005] Aiming at the deficiencies of the prior art, this application provides an electromagnetic liquid flow meter, which has the advantages of changing the liquid surface coverage rate of the fluid passing through the flow meter and avoiding the phenomenon of non-full pipes when the fluid passes through the pipeline of the flow meter.

[0006] To sum up, this application provides the following technical solution: an electromagnetic liquid flow meter, including a converter and a sensor. A flange lining extending outside the sensor is fixedly installed inside the sensor. Manifold pipes are provided at both ends of the sensor. The manifold pipes include connecting pipes and U-shaped pipes. A commutation structure is provided at the connection end of the connecting pipe and the sensor;

[0007] The commutation structure includes a cage fixedly installed in the connecting pipe and a ball valve rotatably installed in the cage. A pressing member for applying a force is provided outside the connecting pipe;

[0008] The pressing member includes a guide pipe fixedly installed on the outer wall of the connecting pipe, a hook fixedly connected to the guide pipe, and a pressing rod threadedly connected to the guide pipe.

[0009] By adopting the above technical solution, connecting pipes are connected to both ends of the sensor, and the fluid can cover the tube wall of the sensor by passing vertically through the U-shaped tube.

[0010] Further, the flange lining is composed of an outer flange plate and an inner tube, and the inner tube extends to the outside of the outer flange plate.

[0011] By adopting the above technical solution, the connection of the sensor can be facilitated.

[0012] Further, both ends of the U-shaped tube communicate with the lower side of the connecting pipe, one end of the connecting pipe is press-connected and communicated with the end of the sensor, the connecting pipe and the U-shaped tube are communicated to form a mouth-shaped tube, and a pressing groove for embedding the flange lining is recessed at the end of the connecting pipe.

[0013] By adopting the above technical solution, the connection and positioning between the connecting pipe and the U-shaped tube are facilitated.

[0014] Further, the cage is located at the communication position of the connecting pipe and the U-shaped tube, and the cage is a three-way part and communicates with both ends of the connecting pipe and the U-shaped tube.

[0015] By adopting the above technical solution, the ball valve located in the middle of the cage can communicate with both the connecting pipe and the U-shaped tube.

[0016] Further, three communicating holes communicating with each other are formed in the ball valve, and the communicating holes correspond to the communication positions of the connecting pipe and the U-shaped tube.

[0017] By adopting the above technical solution, rotating the ball valve can change the flow direction of the fluid so that the fluid does not flow through the connecting pipe and flows through the sensor.

[0018] Further, a handle plate is fixedly installed on the outer wall of the connecting pipe, a handle is rotatably installed on the handle plate, and a shaft core is fixedly connected between the handle and the ball valve.

[0019] By adopting the above technical solution, the orientation position of the ball valve can be conveniently changed from the outside.

[0020] Further, limiting rods protrude on the surface of the handle plate, and the limiting rods are arranged at ninety degrees to each other.

[0021] By adopting the above technical solution, the rotation of the ball valve is limited within a certain range.

[0022] Further, the hook is U-shaped, one end of which is welded to the guide pipe, the other end extends towards one end of the guide pipe, and the inner side of the extending end of the hook is a plane.

[0023] By adopting the above technical solution, the contact surface between the hook and the outer flange of the flange liner is increased to improve the clamping stability.

[0024] Furthermore, one end of the clamping rod expands outward in a conical shape toward the hook, and a hexagonal nut is fixedly mounted on the other end of the clamping rod.

[0025] By adopting the above technical solution, it is convenient to use a tool to pull the clamping rod to rotate.

[0026] The electromagnetic liquid flow meter is provided with a sensor in a pipeline in which the flow meter is connected to the pipeline and is connected to the pipeline through a connecting pipe and a U-shaped pipe. A ball valve is provided to seal the connecting pipe so that the fluid needs to climb vertically through the U-shaped pipe before passing through the sensor. When the flow rate is too small, the fluid can be effectively continued so that the fluid passing through the sensor fills the sensor without generating air bubbles or other interference factors in the empty space. At the same time, a clamping piece is provided to clamp and dock the connecting pipe and the sensor. On the one hand, it is convenient to dismantle the connecting pipe structure, and on the other hand, it is convenient to position and connect the sensor and the connecting pipe, thereby improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of this application;

[0028] Figure 2 This is a schematic diagram of the structure of the connecting pipe end of the present application;

[0029] Figure 3 It is a structural diagram of the connected pipe of this application;

[0030] Figure 4 It is a structural stereogram of the 4 ball valves of the present application;

[0031] Figure 5 It is a structural schematic diagram of the card pressing part of this application.

[0032] Description of reference numerals:

[0033] 1. Converter; 2. Sensor; 3. Flange lining; 4. External flange; 5. Connecting pipe; 6. U-shaped pipe; 7. Retaining frame; 8. Ball valve; 9. Connecting hole; 10. Shaft core; 11. Handle plate; 12. Handle; 13. Limit rod; 14. Pressing piece; 141. Guide tube; 142. Hook; 143. Pressing rod; 144. Hexagonal nut; 15. Pressing groove. DETAILED DESCRIPTION

[0034] See also Figure 1, An electromagnetic liquid flowmeter in this embodiment includes a converter 1 and a sensor 2. Specifically, both the converter 1 and the sensor 2 are conventional components in the prior art. The main function of the converter is to convert the signal generated by the sensor into readable flow data.

[0035] Its components include a signal processing unit that receives the electrode signals from the sensor and amplifies and filters them to improve the signal quality; an analog-to-digital converter (ADC) that converts the analog signal into a digital signal for subsequent processing; a flow calculation unit that calculates the flow value based on the conductivity of the fluid, the flow velocity, and the geometric parameters of the measuring tube; a display and output interface for displaying the flow data (such as an LCD display screen) and an output interface (such as 4-20mA current output, RS485 communication, etc.) to transmit the data to other devices or systems; and a power supply module that provides the required power for the entire flowmeter, usually a battery or an external power supply can be used.

[0036] A flange lining 3 extending outside the sensor 2 is fixedly installed inside the sensor 2. The flange lining 3 is a non-conductive pipe through which the liquid flows. The flange lining 3 is usually made of polymer or ceramic to ensure its insulation. Electrodes and excitation coils are provided inside the flange lining 3.

[0037] Furthermore, there are usually two or more electrodes on the inner wall of the sensor, usually made of stainless steel or other corrosion-resistant materials. The electrodes are used to detect the voltage signal of the fluid; outside the flange lining 3, there is usually one or more excitation coils for generating an alternating magnetic field perpendicular to the flow direction of the fluid.

[0038] Specifically, the flange lining 3 consists of an outer flange disc 4 and an inner pipe, and the inner pipe extends outside the outer flange disc 4.

[0039] To avoid insufficient flow in the horizontal pipe and the fluid not fully filling the pipe surface, flow collectors are provided at both ends of the sensor 2. The flow collector consists of a connecting pipe 5 and a U-shaped pipe 6 that are interconnected.

[0040] Furthermore, both ends of the U-shaped pipe 6 are interconnected with the lower side of the connecting pipe 5, and one end of the connecting pipe 5 is clamped and connected to the end of the sensor 2.

[0041] Please refer to Figure 2 , The connecting pipe 5 and the U-shaped pipe 6 are connected to form a mouth-shaped pipe, and a clamping groove 15 for embedding the flange lining 3 is recessed at the end of the connecting pipe 5.

[0042] By extending the inner pipe of the flange lining 3 into the clamping groove 15 and applying a force to the connecting pipe 5 and the outer flange disc 4 of the flange lining 3, the connection between the sensor 2 and the flow collector is completed.

[0043] It should be supplemented that flange plates are provided at both ends of the U-shaped tube 6 and are connected to the connecting pipe 5 through flanges.

[0044] With such a design, it is convenient to disassemble and separate the U-shaped tube 6 from the connecting pipe 5 for replacing or cleaning the U-shaped tube 6.

[0045] Please refer to Figure 1 and Figure 3 , in this embodiment, a commutation structure is provided at the connecting end of the connecting pipe 5 and the sensor 2 for changing the fluid flow path. The commutation structure includes a cage 7 fixedly installed in the connecting pipe 5 and a ball valve 8 rotatably installed in the cage 7.

[0046] Preferably, the cage 7 is located at the connection between the connecting pipe 5 and the U-shaped tube 6, and the cage 7 is a three-way part and is interconnected with both ends of the connecting pipe 5 and the U-shaped tube 6.

[0047] The cage 7 is mainly used to support and guide the movement of the ball valve 8, which plays a key role in the normal operation of the ball valve 8, ensuring that the ball valve 8 can move smoothly during the opening and closing processes and maintain the correct positioning. The cage 7 is usually made of wear-resistant and corrosion-resistant materials such as polytetrafluoroethylene (PTFE), polyamide (nylon), or metal materials.

[0048] Its structural features include: guiding groove: the cage 7 has a specially designed guiding groove for accommodating the ball valve 8 to ensure the stability of the ball valve 8 during opening and closing; supporting structure: the shape and design of the cage 7 can effectively support the ball valve 8 to prevent it from shifting under high pressure or high flow rate conditions.

[0049] Three communicating holes 9 are provided on the ball valve 8 and are interconnected. The communicating holes 9 correspond to the connection positions of the connecting pipe 5 and the connecting pipe 5 and the U-shaped tube 6. During use, by rotating the ball valve 8, the orientation of the communicating holes 9 can be changed to achieve the obstruction of the connection between both ends of the connecting pipe 5.

[0050] The working principle of the ball valve 8 is relatively simple. When the communicating holes 9 of the ball valve 8 are aligned with the flow direction of the pipeline, the fluid can pass through the ball valve 8; when the ball valve 8 rotates 90 degrees, the communicating holes 9 are perpendicular to the flow direction and the fluid is blocked.

[0051] With such a design, it can be ensured that the fluid only flows through the sensor 2 via the U-shaped tube 6. When the fluid vertically climbs the U-shaped tube 6, it can be accumulated and then pass through the sensor 2 to assist in measuring the flow rate of the fluid at low flow rates.

[0052] Please refer to Figure 1 , Figure 3 and Figure 4, in this embodiment, a handle plate 11 is fixedly installed on the outer wall of the connecting pipe 5, a handle 12 is rotatably installed on the handle plate 11, and a shaft core 10 is fixedly connected between the handle 12 and the ball valve 8. Through the connection of the shaft core 10, it is convenient to drive the rotation of the ball valve 8 by rotating the external handle 12.

[0053] In order to limit the rotation range of the ball valve 8, a limiting rod 13 protrudes from the surface of the handle plate 11, and the limiting rods 13 are arranged at ninety degrees, so that the ball valve 8 can only rotate within a range of ninety degrees clockwise or counterclockwise.

[0054] Please refer to Figure 5 , in this embodiment, a pressing member 14 for applying a force is arranged outside the connecting pipe 5, and the pressing member 14 is used to assist in the connection and positioning of the connecting pipe 5 and the sensor 2.

[0055] Specifically, the pressing member 14 includes a guiding pipe 141 fixedly installed on the outer wall of the connecting pipe 5, a hook 142 fixedly connected to the guiding pipe 141, and a pressing rod 143 threadedly connected to the guiding pipe 141.

[0056] Among them, the hook 142 is U-shaped, one end of which is welded to the guiding pipe 141, and the other end extends towards one end of the guiding pipe 141, and the inner side of the extending end of the hook 142 is a plane.

[0057] With such a design, the contact area between the hook 142 and the outer flange 4 of the flange lining 3 is increased to improve the pressing stability.

[0058] Furthermore, one end of the pressing rod 143 facing the hook 142 is outwardly expanded in a conical shape to increase the contact area of the pressing rod 143. A hexagonal nut 144 is also fixedly installed at the other end of the pressing rod 143, and the hexagonal nut 144 has a regular hexagonal counterbore, which can facilitate the use of tools to pull the pressing rod 143 to rotate.

[0059] The working principle of the above embodiment is:

[0060] Connect the connecting pipe 5 to the end of the sensor 2 of the flowmeter. Insert the inner pipe in the flange lining 3 extending from the sensor 2 into the clamping groove 15 inside the connecting pipe 5, so that the connecting pipe 5 and the flange lining 3 are connected to each other. Hook the hook 142 on the clamping member 14 outside the connecting pipe 5 onto the outer flange 4 of the flange lining 3. Rotate the clamping rod 143. The clamping rod 143 approaches the outer flange 4 of the flange lining 3 under the rotation and screw fit relative to the guide pipe 141, realizing the clamping and fixing of the connecting pipe 5 and the flange lining 3. Subsequently, flange-fix the side of the outer flange 4 of the flange lining 3 and the connecting pipe 5 to each other. When the fluid flow rate in the pipeline is too small, rotate the handle 12 outside the connecting pipe 5. After rotation, the handle 12 drives the ball valve 8 to rotate through the shaft core 10. The ball valve 8 changes the communication position of the communication hole 9 during rotation, so that the communication hole 9 closes both ends of the connecting pipe 5. At this time, the fluid only flows through the U-shaped pipe 6 and passes through the sensor 2, thereby ensuring that there are no interference factors such as air bubbles remaining in the free space when the fluid passes through the sensor 2.

Claims

1. An electromagnetic liquid flowmeter, comprising a converter (1) and a sensor (2), characterized in that: A flange lining (3) extending outside the sensor (2) is fixedly installed inside the sensor (2). Manifold pipes are arranged at both ends of the sensor (2). The manifold pipes include connecting pipes (5) and U-shaped pipes (6). A commutation structure is arranged at the connecting end of the connecting pipe (5) and the sensor (2). The commutation structure includes a cage (7) fixedly installed inside the connecting pipe (5) and a ball valve (8) rotatably installed inside the cage (7). A pressing member (14) for applying a force is arranged outside the connecting pipe (5). The pressing member (14) includes a guide pipe (141) fixedly installed on the outer wall of the connecting pipe (5), a hook (142) fixedly connected to the guide pipe (141), and a pressing rod (143) threadedly connected to the guide pipe (141).

2. An electromagnetic liquid flowmeter according to claim 1, characterized in that: The flange lining (3) is composed of an outer flange plate (4) and an inner pipe, and the inner pipe extends outside the outer flange plate (4).

3. An electromagnetic liquid flowmeter according to claim 2, characterized in that: Both ends of the U-shaped pipe (6) are communicated with the lower side surface of the connecting pipe (5). One end of the connecting pipe (5) is press-connected to the end of the sensor (2). The connecting pipe (5) and the U-shaped pipe (6) are communicated to form a mouth-shaped pipe, and a pressing groove (15) for the flange lining (3) to be embedded is recessed at the end of the connecting pipe (5).

4. An electromagnetic liquid flowmeter according to claim 3, characterized in that: The cage (7) is located at the communication position of the connecting pipe (5) and the U-shaped pipe (6), and the cage (7) is a three-way part and is communicated with both ends of the connecting pipe (5) and the U-shaped pipe (6).

5. An electromagnetic liquid flowmeter according to claim 1, characterized in that: Three communicating holes (9) communicating with each other are formed in the ball valve (8), and the communicating holes (9) correspond to the communicating positions of the connecting pipe (5) and the connecting pipe (5) and the U-shaped pipe (6).

6. An electromagnetic liquid flowmeter according to claim 1, characterized in that: A handle plate (11) is fixedly installed on the outer wall of the connecting pipe (5). A handle (12) is rotatably installed on the handle plate (11). A shaft core (10) is fixedly connected between the handle (12) and the ball valve (8).

7. An electromagnetic liquid flowmeter according to claim 6, characterized in that: Limiting rods (13) protrude on the surface of the handle plate (11), and the limiting rods (13) are arranged at ninety degrees to each other.

8. An electromagnetic liquid flowmeter according to claim 1, characterized in that: The hook (142) is U-shaped. One end of the hook (142) is welded to the guide pipe (141), and the other end extends towards one end of the guide pipe (141), and the inner side of the extending end of the hook (142) is a plane.

9. An electromagnetic liquid flowmeter according to claim 8, characterized in that: One end of the pressing rod (143) facing the hook (142) is conically expanded outwards, and a hexagonal nut (144) is fixedly installed on the other end of the pressing rod (143).

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