Low-power-consumption electromagnetic flowmeter

Abstract

The utility model discloses a low-power-consumption electromagnetic flowmeter which comprises a flowmeter body, a measuring element of the flowmeter body is arranged in a connector pipe, and flanges are arranged at the two ends of the connector pipe. A filter screen is arranged in the joint pipe, a scraper is arranged on the surface of the filter screen, and the scraper cleans the surface of the filter screen; when the filter screen is blocked, the scraping plate can automatically move in a reciprocating mode to clean the surface of the filter screen, the scraping plate is driven by flowing liquid, flocculates or precipitates in fluid are filtered through the filter screen, the flocculates or precipitates are prevented from being accumulated on the electrode for a long time, the conductivity of the electrode is not affected, the working performance of the electrode is improved, and energy consumption is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of flow meters, and in particular relates to a low-power electromagnetic flow meter. Background Art

[0002] Electromagnetic flowmeter is an inductive instrument manufactured according to Faraday's law of electromagnetic induction to measure the volume flow of conductive media in pipes. It can be used to measure the volume flow of conductive fluids in closed pipes and is widely used in flow measurement and control in industrial and agricultural production processes such as petrochemicals, steel metallurgy, water supply and drainage, and water conservancy irrigation. The working principle is based on Faraday's law of electromagnetic induction. When a conductor moves in a magnetic field, an induced electromotive force will be generated at both ends of the conductor in a direction perpendicular to the direction of the magnetic field and the direction of movement. The magnitude of the electromotive force is proportional to the speed of the conductor and the magnetic induction intensity of the magnetic field.

[0003] The measuring device of the electromagnetic flowmeter is the electrode. After the electrode is used for a long time, the flocculated sediment in the water will be deposited on its surface, causing the conductivity of the electrode to deteriorate, the working efficiency to decrease, the energy consumption to increase and other problems, affecting its normal use. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a low-power electromagnetic flowmeter, which at least solves one of the problems of the background technology.

[0005] The utility model provides the following technical solutions:

[0006] A low-power electromagnetic flowmeter comprises a flowmeter body, a measuring element of the flowmeter body is arranged in a joint pipe, and flanges are arranged at both ends of the joint pipe;

[0007] A filter screen is arranged inside the joint pipe, and a scraper is arranged on the surface of the filter screen to clean the surface of the filter screen;

[0008] When the filter is clogged, the scraper can automatically move back and forth to clean the filter surface, and the scraper is driven by the flowing liquid.

[0009] Preferably, the filter is arranged in the upstream direction of the measuring device, and the scraper is arranged on the upstream surface of the filter; an outer box is provided below the joint pipe, and a connecting pipe is provided inside the outer box, both ends of the connecting pipe are connected to the joint pipe, one end is connected to the upstream position of the filter, and the other end is connected to the downstream position of the filter.

[0010] Preferably, a blade is provided in the connecting tube, the rotating shaft of the blade extends to the outside of the connecting tube, and the rotating shaft of the blade is sealingly and rotatably connected to the connecting tube, the other end of the rotating shaft of the blade is connected to a turntable, the other side of the turntable is eccentrically connected to a connecting rod, the other end of the connecting rod is rotatably connected to a scraper, the scraper passes through the connecting tube, and the scraper is sealingly and slidably connected to the wall of the connecting tube.

[0011] Preferably, a baffle is provided at the position where the end of the connecting pipe close to the upstream is connected to the joint pipe; and a movable door is provided on the baffle, and the movable door can be closed and tightly connected with the baffle.

[0012] Preferably, a rotating column is provided on one side of the movable door, and is rotatably connected to the baffle via the rotating column.

[0013] Preferably, the movable door is connected to an arc tube on one side close to the inside of the connecting tube, and an arc rod is provided at the other end of the arc tube. The arc rod is slidably connected inside the arc tube, and the other end of the arc rod is connected to the inner wall of the connecting tube.

[0014] Preferably, a spring is provided in the arc tube, one end of the spring is connected to the arc rod, and the other end of the spring is connected to the inner wall of the arc tube.

[0015] In addition, when conducting flow detection, the joint pipe is connected to the pipe to be tested through the flange, and the flow meter body is used for measurement. When the fluid passes through the joint pipe, the flocculation or sediment in the fluid is filtered through the set filter to prevent it from accumulating on the electrode for a long time and affecting the conductivity of the electrode, which helps to improve its working performance and reduce energy consumption; when the flocculation sediment on the filter screen gradually increases, the filter screen will be blocked, which will affect the fluidity of the joint pipe and cause measurement errors. In order to solve this problem, when the filter screen is blocked with a low pass rate, the water pressure upstream increases, and the movable gate is opened after the water pressure increases. It opens under pressure, and at the same time, the spring in the arc tube contracts under pressure, the arc rod contracts into the arc tube, and the upstream fluid enters the connecting tube and flows to the downstream through the connecting tube. The fluid flow in the connecting tube drives the blades to rotate, the blades drive the turntable to rotate, the turntable drives the connecting rod to move back and forth, and the connecting rod drives the scraper to scrape back and forth to clean the flocculation and sediment on the filter screen, thereby achieving the purpose of automatically cleaning the filter screen and preventing the flocculation from precipitating and accumulating on the electrode; when the filter screen is cleaned, the water pressure upstream is reduced, the movable door is closed by the spring rebound force, and the scraper stops moving.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model discloses a low-power electromagnetic flowmeter, which filters flocculation or sediment in the fluid through a set filter screen to prevent the flocculation or sediment from accumulating on the electrode for a long time and affecting the conductivity of the electrode, thereby helping to improve its working performance and reduce energy consumption.

[0018] When the filter is clogged due to low pass rate, the water pressure upstream increases. After the water pressure increases, the movable door opens due to pressure and flows to the downstream through the connecting pipe. The fluid flow in the connecting pipe drives the blades to rotate, the blades drive the turntable to rotate, the turntable drives the connecting rod to move back and forth, and the connecting rod drives the scraper to scrape back and forth to clean up the flocculation and sediment on the filter, thereby achieving the purpose of automatically cleaning the filter and preventing the flocculation from precipitating and accumulating on the electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 It is a schematic diagram of the blade connection structure of the utility model.

[0022] Figure 3 It is a schematic diagram of the enlarged structure of the A part of the utility model. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the implementation mode of the utility model clearer, the technical solution in the implementation mode of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation mode of the utility model. Obviously, the described implementation mode is a part of the implementation mode of the utility model, not all the implementation modes. Based on the implementation mode in the utility model, all other implementation modes obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0025] Embodiment 1:

[0026] like Figure 1-3As shown, a low-power electromagnetic flowmeter includes a flowmeter body 1, a measuring element of the flowmeter body 1 is arranged in a joint pipe 2, and flanges 16 are arranged at both ends of the joint pipe 2; a filter screen 5 is arranged in the joint pipe 2, and a scraper 6 is arranged on the surface of the filter screen 5, and the scraper 6 cleans the surface of the filter screen 5; when the filter screen 5 is blocked, the scraper 6 can automatically reciprocate to clean the surface of the filter screen 5, and the scraper 6 is driven by the flowing liquid. The filter screen 5 is arranged in the upstream direction of the measuring device 3, and the scraper 6 is arranged on the upstream surface of the filter screen 5; an outer box 4 is arranged below the joint pipe 2, and a connecting pipe 8 is arranged in the outer box 4, and both ends of the connecting pipe 8 are connected to the joint pipe 2, one end is connected to the upstream position of the filter screen 5, and the other end is connected to the downstream position of the filter screen 5. A blade 9 is provided in the connecting tube 8, and the rotating shaft of the blade 9 extends to the outside of the connecting tube 8, and the rotating shaft of the blade 9 is sealed and rotatably connected to the connecting tube 8, and the other end of the rotating shaft of the blade 9 is connected to a turntable 10, and the other side of the turntable 10 is eccentrically rotatably connected to a connecting rod 7, and the other end of the connecting rod 7 is rotatably connected to a scraper 6, which passes through the connecting tube 8, and the scraper 6 is sealed and slidably connected to the wall of the connecting tube 8.

[0027] A baffle 11 is provided at the position where the end of the connecting pipe 8 near the upstream is connected to the joint pipe 2; a movable door 12 is provided on the baffle 11, and the movable door 12 can be closed and closely connected with the baffle 11. A rotating column is provided on one side of the movable door 12, and the movable door 12 is rotatably connected to the baffle 11 through the rotating column. An arc tube 13 is connected to the side of the movable door 12 near the inside of the connecting pipe 8, and an arc rod 14 is provided at the other end of the arc tube 13. The arc rod 14 is slidably connected inside the arc tube 13, and the other end of the arc rod 14 is connected to the inner wall of the connecting pipe 8. A spring 15 is provided in the arc tube 13, and one end of the spring 15 is connected to the arc rod 14, and the other end is connected to the inner wall of the arc tube 13.

[0028] When performing flow detection, the joint pipe 2 is connected to the pipeline to be tested through the flange 16, and the flow meter body 1 is used for measurement. When the fluid passes through the joint pipe 2, the flocculation or sediment in the fluid is filtered through the set filter screen 5 to prevent it from accumulating on the electrode for a long time and affecting the conductivity of the electrode, which helps to improve its working performance and reduce energy consumption; when the flocculation sediment on the filter screen 5 gradually increases, the filter screen 5 will be blocked, which will affect the fluidity of the joint pipe 2 and cause measurement errors. In order to solve this problem, when the filter screen 5 is blocked with a low pass rate, the water pressure upstream increases. After the water pressure increases, the movable door 12 is opened by pressure, and the arc The spring 15 in the curved tube 13 contracts under the pressure, and the curved rod 14 contracts into the curved tube 13. The upstream fluid enters the connecting tube 8 and flows to the downstream through the connecting tube 8. The fluid flow in the connecting tube 8 drives the blades 9 to rotate, and the blades 9 drive the turntable 10 to rotate. The turntable 10 drives the connecting rod 7 to move back and forth, and the connecting rod 7 drives the scraper 6 to scrape back and forth to clean the flocculation and sediment on the filter screen 5, thereby achieving the purpose of automatically cleaning the filter screen 5 and preventing the flocculation from precipitating and accumulating on the electrode; when the filter screen 5 is cleaned, the water pressure upstream is reduced, the movable door 12 is closed by the rebound force of the spring 15, and the scraper 6 stops hanging.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-power electromagnetic flowmeter, characterized in that: It comprises a flow meter body (1), wherein a measuring element of the flow meter body (1) is arranged in a joint pipe (2), and flanges (16) are arranged at both ends of the joint pipe (2); A filter screen (5) is provided inside the joint pipe (2), and a scraper (6) is provided on the surface of the filter screen (5), and the scraper (6) cleans the surface of the filter screen (5); When the filter screen (5) is clogged, the scraper (6) can automatically reciprocate to clean the surface of the filter screen (5), and the scraper (6) is driven by the flowing liquid.

2. A low-power electromagnetic flowmeter according to claim 1, characterized in that: The filter screen (5) is arranged in the upstream direction of the measuring device (3), and the scraper (6) is arranged on the upstream surface of the filter screen (5); an outer box (4) is arranged below the joint pipe (2), and a connecting pipe (8) is arranged inside the outer box (4); both ends of the connecting pipe (8) are connected to the joint pipe (2), one end is connected to the upstream position of the filter screen (5), and the other end is connected to the downstream position of the filter screen (5).

3. A low-power electromagnetic flowmeter according to claim 2, characterized in that: A blade (9) is provided in the connecting tube (8), the rotating shaft of the blade (9) extends to the outside of the connecting tube (8), and the rotating shaft of the blade (9) is connected to the connecting tube (8) in a sealed and rotatable manner. The other end of the rotating shaft of the blade (9) is connected to a rotating disk (10), and the other side of the rotating disk (10) is eccentrically rotatably connected to a connecting rod (7), and the other end of the connecting rod (7) is rotatably connected to a scraper (6), and the scraper (6) passes through the connecting tube (8), and the scraper (6) is connected to the wall of the connecting tube (8) in a sealed and slidable manner.

4. A low-power electromagnetic flowmeter according to claim 2, characterized in that: A baffle (11) is provided at a position where the end of the connecting pipe (8) close to the upstream is connected to the joint pipe (2); a movable door (12) is provided on the baffle (11), and the movable door (12) can be closed and tightly connected with the baffle (11).

5. A low-power electromagnetic flowmeter according to claim 4, characterized in that: A rotating column is provided on one side of the movable door (12), and is rotatably connected to the baffle plate (11) via the rotating column.

6. A low-power electromagnetic flowmeter according to claim 4, characterized in that: The movable door (12) is connected to an arc-shaped tube (13) on one side close to the interior of the connecting tube (8), and an arc-shaped rod (14) is provided at the other end of the arc-shaped tube (13). The arc-shaped rod (14) is slidably connected inside the arc-shaped tube (13), and the other end of the arc-shaped rod (14) is connected to the inner wall of the connecting tube (8).

7. A low-power electromagnetic flowmeter according to claim 6, characterized in that: A spring (15) is arranged inside the arc-shaped tube (13); one end of the spring (15) is connected to the arc-shaped rod (14), and the other end is connected to the inner wall of the arc-shaped tube (13).

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