Flow velocity measuring device based on magnetic suspension

Abstract

The invention discloses a flow velocity measuring device based on magnetic suspension, and belongs to the technical field of fluid flow velocity measurement, the flow velocity measuring device comprises a mounting cylinder, the side surface of the mounting cylinder is provided with a magnetic suspension flow velocity measuring instrument, the interior of the magnetic suspension flow velocity measuring instrument is rotatably connected with a rotating shaft, and the side inner wall of the mounting cylinder is fixedly connected with a guide plate. The interior of the guide plate is movably connected with a guide rod, and one end of the guide rod is fixedly connected with a mounting plate. A first blocking frame in the first mounting flange and a second blocking frame in the second mounting flange are matched with two filter screens symmetrically arranged in the mounting cylinder, impurities of fluid in a pipeline can be intercepted and filtered, and the situation that the impurities make direct contact with a rotating impeller and are wound around the rotating impeller can be avoided; and the dredging rod, the round rod and the round ball can dredge the first blocking frame and the filter screen, so that the fluid passes through the first blocking frame and the filter screen.

Description

Technical Field

[0001] The invention belongs to the technical field of fluid flow rate measurement, and in particular relates to a flow rate measurement device based on magnetic suspension. Background Art

[0002] A flow rate measuring device is an instrument used to measure the flow rate of a fluid (such as water, air, etc.) in a pipe or channel.

[0003] Common flow velocity measurement devices include Pitot tubes, propeller flow meters, ultrasonic flow meters, radar flow meters, hot wire anemometers and laser Doppler velocimeters, etc. They each have their own advantages and limitations in different application scenarios and requirements.

[0004] Existing flow meters for detecting the flow rate of fluid in a pipeline are usually installed directly on the pipeline. The flow rate is measured by the built-in impeller in cooperation with a velocity sensor under the action of fluid impact. However, due to the different materials in the pipeline, when installing and measuring, if the pipeline contains fluids with impurities such as exhaust flue gas and river water, some debris will be entangled on the impeller surface and the shaft when passing through the impeller, affecting the rotation of the shaft and causing inaccurate flow rate measurement. Excessive impurities will cause pipeline blockage, affecting the measurement accuracy of the flow meter. Summary of the invention

[0005] The technical problem to be solved by the invention is to overcome the shortcomings of the above-mentioned prior art and provide a flow velocity measuring device based on magnetic levitation, comprising a mounting cylinder, a magnetic levitation flow velocity measuring instrument is arranged on the side surface of the mounting cylinder, a rotating shaft is rotatably connected inside the magnetic levitation flow velocity measuring instrument, a guide plate is fixedly connected to the side inner wall of the mounting cylinder, a guide rod is movably connected inside the guide plate, one end of the guide rod is fixedly connected to the mounting plate, a dredging rod is fixedly connected to the side surface of the mounting plate, a round rod is fixedly connected to the side surface of the mounting plate, and a filter screen is symmetrically fixedly connected to both ends of the side inner wall of the mounting cylinder;

[0006] The end of the guide rod away from the mounting plate is fixedly connected to a circular plate, the side surface of the guide plate is provided with a mounting groove, the side inner wall of the mounting groove is fixedly connected to an electric telescopic rod, the output end of the electric telescopic rod is fixedly connected to an electromagnet, the inside of the circular rod is movably connected to a mounting shaft, and one end of the mounting shaft is fixedly connected to a round ball.

[0007] The technical solution adopted to solve the above technical problems is: when the device is installed on the pipeline for use, impurities in the fluid will be hung on the first baffle after long-term use, and some impurities will pass through the first baffle frame and be intercepted by the filter, which can effectively prevent impurities from passing through the device and avoiding contact with the rotating impeller, and avoiding entanglement on the rotating impeller and the rotating shaft to affect the use of the magnetic levitation flow meter. After using it for a period of time, the power supply can be turned on to energize the electric telescopic rod and the electromagnet, so that the electric telescopic rod pushes out the electromagnet to adsorb the circular plate. During the continuous extension and retraction, the dredging rod dredges the first gap to avoid blockage. During the continuous extension and retraction, the displacement of the round rod causes the ball to continuously hit the filter, causing the filter to vibrate slightly to cause the surface impurities to fall off.

[0008] Furthermore, one end of the mounting tube is fixedly connected to a first mounting flange, a side inner wall of the first mounting flange is fixedly connected to a first retaining frame, a side surface of the first mounting flange is movably connected to a bolt, and a side surface of the bolt is threadedly connected to a nut.

[0009] Through the above technical solution, one end of the mounting tube is connected to the pipeline through the first mounting flange, bolts and nuts.

[0010] Furthermore, one end of the mounting tube is fixedly connected to a second mounting flange, a side inner wall of the second mounting flange is fixedly connected to a second retaining frame, and a side surface of the bolt is movably connected to the second mounting flange.

[0011] Through the above technical solution, the other end of the mounting tube is connected to the pipeline through the second mounting flange, bolts and nuts.

[0012] Furthermore, the rotating shaft penetrates into the interior of the installation cylinder, one end of the rotating shaft located inside the installation cylinder is fixedly connected to the fixing cylinder, and the side surface of the fixing cylinder is fixedly connected to the rotating impeller.

[0013] Through the above technical solution, the rotating impeller rotates under the push of the fluid to rotate the rotating shaft, thereby enabling the magnetic suspension flow meter to measure the flow velocity of the fluid.

[0014] Furthermore, a first spring is fixedly connected to the side surface of the circular plate, and one end of the first spring away from the circular plate is fixedly connected to the guide plate.

[0015] Through the above technical solution, the first spring is reset when the electromagnet is powered off, driving the guide rod, the dredging rod and the round rod to reset to the initial point and preventing the guide rod from slipping.

[0016] Furthermore, the circular plate is made of iron sheet, and there are multiple dredging rods.

[0017] Through the above technical solution, the iron sheet can be adsorbed by the electromagnet and then drive the guide rod to move.

[0018] Furthermore, the side surface of the sphere contacts the filter screen, and the end of the mounting shaft away from the sphere is fixedly connected to a limit plate, and the side surface of the limit plate contacts the side inner wall of the round rod.

[0019] Through the above technical solution, the limit plate prevents the installation shaft from slipping during displacement, and the ball contacts the filter screen, knocks the filter screen to cause a slight vibration of the filter screen, thereby causing impurities on the surface of the filter screen to fall off.

[0020] Furthermore, a second spring is fixedly connected to the side surface of the limiting plate, and one end of the second spring away from the limiting plate is fixedly connected to the round rod.

[0021] Through the above technical solution, the second spring can shrink and reset, and when shrinking, it can prevent the ball from having a strong impact on the filter, which may cause deformation and damage to the filter.

[0022] Furthermore, the magnetic suspension flow meter is internally provided with a plurality of groups of inner magnetic rings and outer magnetic rings.

[0023] Through the above technical solution, multiple sets of inner magnetic rings can reduce the use of bearings on the rotating shaft and reduce mechanical wear.

[0024] The beneficial effects of the present invention are as follows:

[0025] (1) The first retaining frame in the first mounting flange, the second retaining frame in the second mounting flange and the two filter screens symmetrically arranged in the mounting tube cooperate to intercept and filter the impurities in the fluid in the pipeline, thereby preventing the impurities from directly contacting the rotating impeller and winding around the rotating impeller, thereby affecting the rotation of the rotating shaft and thus affecting the use of the magnetic suspension flow meter;

[0026] (2) The guide plate, guide rod, dredging rod, round rod, electric telescopic rod and electromagnet installed in the installation tube are coordinated to enable the dredging rod and the round rod to move, and during the displacement, the debris attached to and hung on the first and second blocking frames are pushed down to avoid being completely covered by the debris and affecting the fluid passing. During the displacement, the round rod and the round ball continuously knock the filter screen, so that the debris on the filter screen is vibrated and falls off, thereby allowing the fluid to pass and avoid blockage affecting the measurement accuracy;

[0027] (3) When the ball continuously strikes the filter, the second spring inside will be compressed and reset to different degrees, which can prevent the filter from being deformed and damaged due to excessive impact force when the ball contacts and strikes the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a first-view structural diagram of a flow velocity measurement device based on magnetic levitation according to the present invention;

[0029] Figure 2This is a second perspective structural diagram of a flow velocity measurement device based on magnetic levitation according to the present invention;

[0030] Figure 3 It is a partial structural cross-sectional view of a flow velocity measuring device based on magnetic suspension according to the present invention;

[0031] Figure 4 This Figure 3 The enlarged view of point A in the middle;

[0032] Figure 5 It is a partial structural exploded diagram of a flow velocity measuring device based on magnetic suspension according to the present invention;

[0033] Figure 6 It is a partial structural schematic diagram of a flow velocity measuring device based on magnetic levitation of the present invention.

[0034] Figure numerals: 1. mounting cylinder; 2. magnetic levitation flow meter; 3. first mounting flange; 4. first retaining frame; 5. second mounting flange; 6. second retaining frame; 7. rotating shaft; 8. fixing cylinder; 9. rotating impeller; 10. guide plate; 11. guide rod; 12. round plate; 13. first spring; 14. mounting plate; 15. dredging rod; 16. filter screen; 17. round rod; 18. mounting shaft; 19. round ball; 20. limit plate; 21. second spring; 22. bolt; 23. nut; 24. mounting groove; 25. electric telescopic rod; 26. electromagnet. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] like Figure 1-Figure 6As shown, a flow rate measuring device based on magnetic levitation of the present embodiment includes a mounting tube 1, one end of the mounting tube 1 is fixedly connected with a first mounting flange 3, the side inner wall of the first mounting flange 3 is fixedly connected with a first baffle 4, the side surface of the first mounting flange 3 is movably connected with a bolt 22, the side surface of the bolt 22 is threadedly connected with a nut 23, one end of the mounting tube 1 is fixedly connected with a second mounting flange 5, the side inner wall of the second mounting flange 5 is fixedly connected with a second baffle 6, the mounting tube 1 is installed on the pipeline through the first mounting flange 3 and the second mounting flange 5, when the mounting tube 1 is installed on the pipeline, the direction of the internal fluid is the direction from the first mounting flange 3 to the second mounting flange 5, the fluid first passes through the first baffle 4 in the first mounting flange 3, some longer impurities inside will be blocked by the first baffle 4, the fluid continues to flow through the filter screen 16 installed inside the mounting tube 1, the impurities are further blocked, and the fluid passes The side surface of the bolt 22 is movably connected to the second mounting flange 5, and a magnetic levitation flowmeter 2 is arranged on the side surface of the mounting tube 1. The magnetic levitation flowmeter 2 is internally rotatably connected with a rotating shaft 7, and the rotating shaft 7 penetrates into the interior of the mounting tube 1. One end of the rotating shaft 7 located inside the mounting tube 1 is fixedly connected with a fixed tube 8, and a rotating impeller 9 is fixedly connected to the side surface of the fixed tube 8. A guide plate 10 is fixedly connected to the side inner wall of the mounting tube 1, and a guide rod 11 is movably connected to the inside of the guide plate 10. One end of the guide rod 11 is fixedly connected to a mounting plate 14, and a dredging rod 15 is fixedly connected to the side surface of the mounting plate 14. A round rod 17 is fixedly connected to the side surface of the mounting plate 14, and a filter screen 16 is symmetrically fixedly connected to both ends of the side inner wall of the mounting tube 1. The filter screen 16 filters the fluid to prevent impurities from entering the interior and affecting the rotation of the rotating impeller 9 and the rotating shaft 7, thereby effectively improving the measurement accuracy of the magnetic levitation flowmeter 2.

[0037] The end of the guide rod 11 away from the mounting plate 14 is fixedly connected with a circular plate 12, and the side surface of the circular plate 12 is fixedly connected with a first spring 13, and the end of the first spring 13 away from the circular plate 12 is fixedly connected to the guide plate 10, and the circular plate 12 is made of iron sheet. There are multiple dredging rods 15, and the multiple dredging rods 15 can dredge the debris in the pores of the first baffle 4 to prevent the first baffle 4 from being completely blocked and affecting the passage of the fluid. The side surface of the guide plate 10 is provided with a mounting groove 24, and the side inner wall of the mounting groove 24 is fixedly connected with an electric telescopic rod 25, and the output end of the electric telescopic rod 25 is fixedly connected with an electromagnet 26. The electromagnet 26 generates magnetic force after being energized, and can be pushed out to generate displacement under the action of the electric telescopic rod 25 after being energized, so as to The circular plate 12 is adsorbed, driving the circular plate 12 to move. At this time, the guide rod 11 is displaced under the guidance of the guide plate 10, so that the dredging rod 15 and the round rod 17 installed on the mounting plate 14 are displaced. When the dredging rod 15 is displaced, the gap in the first retaining frame 4 is dredged. When the round rod 17 is displaced, the mounting shaft 18 installed in the round rod 17 drives the ball 19 to move. When the ball 19 is displaced, it continuously hits the filter screen 16, causing the filter screen 16 to vibrate slightly to cause some impurities attached to the top to fall off, so as to prevent the filter screen 16 from being blocked by debris and affecting the flow of the fluid. The internal movability of the round rod 17 is connected to the mounting shaft 18, and one end of the mounting shaft 18 is fixedly connected to the ball 19. The side surface of the ball 19 is close to the filter screen 16 contact, the end of the installation shaft 18 away from the ball 19 is fixedly connected to the limit plate 20, the limit plate 20 limits the displacement of the installation shaft 18 to prevent the installation shaft 18 from slipping, the side surface of the limit plate 20 is in contact with the side inner wall of the round rod 17, the side surface of the limit plate 20 is fixedly connected with a second spring 21, the second spring 21 is reset and compressed to make the ball 19 compressed when in contact with the filter screen 16 to avoid excessive impact force, resulting in deformation and damage of the filter screen 16, the end of the second spring 21 away from the limit plate 20 is fixedly connected to the round rod 17, the interior of the magnetic levitation flow meter 2 is provided with multiple groups of inner magnetic rings and outer magnetic rings, the multiple groups of inner magnetic rings cooperate with the outer magnetic rings to reduce the use of bearings and reduce the mechanical wear of the rotating shaft 7 during rotation, the inner magnetic rings and the outer magnetic rings The ring is the prior art of the magnetic levitation flow meter 2. Those skilled in the art know that the guide rod 11, guide plate 10, circular plate 12, first spring 13, mounting plate 14, dredging rod 15, circular rod 17, mounting shaft 18, ball 19, limit plate 20, second spring 21, electric telescopic rod 25 and electromagnet 26 symmetrically installed inside the mounting tube 1 can dredge both the first baffle 4 and the second baffle 6. The existence of the second baffle 6 is to prevent the backflow of fluid in the pipeline from bringing back impurities and affecting the rotating impeller 9, and the space formed between the two symmetrically installed filter screens 16 and the mounting tube 1 can effectively prevent impurities from entering this space, and the rotating impeller 9 is located in this space, and can avoid being entangled by impurities when the rotating impeller 9 rotates.

[0038] The working principle of this embodiment is as follows: the device is installed on the pipeline for measuring flow rate through the first mounting flange 3, the second mounting flange 5, the bolts 22 and the nuts 23. The medium in the pipeline flows, and passes through the pipeline, the first mounting flange 3, the first retaining frame 4, the filter screen 16 in turn, and impacts the rotating impeller 9, so that the rotating impeller 9 rotates and then drives the rotating shaft 7 to rotate, so that the magnetic suspension flow meter 2 measures the flow rate of the fluid. Impurities in the fluid in the pipeline will hang on the first retaining frame 4 or be blocked by the filter screen 16. After a period of use, the electric telescopic rod 25 and the electromagnet 26 can be energized to make the electric telescopic rod 25 The electromagnet 26 is pushed out, and the electromagnet 26 absorbs the circular plate 12, and the electric telescopic rod 25 is continuously started and retracted, so that the dredging rod 15 and the round rod 17 installed on the mounting plate 14 are displaced. When the dredging rod 15 is displaced, the impurities suspended on the first baffle frame 4 are pushed down to dredge the first baffle frame 4 to avoid complete blockage affecting the passage of fluid. The round rod 17 is displaced to make the ball 19 continuously hit the filter screen 16 to make the impurities on the filter screen 16 fall off to avoid blockage of the filter screen 16. When the ball 19 hits the filter screen 16, the second spring 21 installed inside is compressed to avoid excessive impact and deformation damage of the filter screen 16.

[0039] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A flow velocity measuring device based on magnetic levitation, comprising a mounting tube (1), characterized in that: The side surface of the installation cylinder (1) is provided with a magnetic suspension flow meter (2), the magnetic suspension flow meter (2) is rotatably connected to a rotating shaft (7) inside, the side inner wall of the installation cylinder (1) is fixedly connected to a guide plate (10), the guide plate (10) is movably connected to a guide rod (11) inside, one end of the guide rod (11) is fixedly connected to a mounting plate (14), the side surface of the mounting plate (14) is fixedly connected to a dredging rod (15), the side surface of the mounting plate (14) is fixedly connected to a round rod (17), and the two ends of the side inner wall of the installation cylinder (1) are symmetrically fixedly connected to filter screens (16); The end of the guide rod (11) away from the mounting plate (14) is fixedly connected to a circular plate (12); a mounting groove (24) is provided on the side surface of the guide plate (10); an electric telescopic rod (25) is fixedly connected to the inner side wall of the mounting groove (24); an electromagnet (26) is fixedly connected to the output end of the electric telescopic rod (25); a mounting shaft (18) is movably connected inside the circular rod (17); a round ball (19) is fixedly connected to one end of the mounting shaft (18).

2. A flow velocity measuring device based on magnetic levitation according to claim 1, characterized in that: One end of the mounting tube (1) is fixedly connected to a first mounting flange (3), a side inner wall of the first mounting flange (3) is fixedly connected to a first retaining frame (4), a side surface of the first mounting flange (3) is movably connected to a bolt (22), and a side surface of the bolt (22) is threadedly connected to a nut (23).

3. A flow velocity measuring device based on magnetic levitation according to claim 2, characterized in that: One end of the mounting tube (1) is fixedly connected to a second mounting flange (5), a side inner wall of the second mounting flange (5) is fixedly connected to a second retaining frame (6), and a side surface of the bolt (22) is movably connected to the second mounting flange (5).

4. The flow velocity measuring device based on magnetic levitation according to claim 1, characterized in that: The rotating shaft (7) penetrates into the interior of the mounting cylinder (1); one end of the rotating shaft (7) located inside the mounting cylinder (1) is fixedly connected to a fixing cylinder (8); and a rotating impeller (9) is fixedly connected to the side surface of the fixing cylinder (8).

5. The flow velocity measuring device based on magnetic levitation according to claim 1, characterized in that: A first spring (13) is fixedly connected to the side surface of the circular plate (12), and one end of the first spring (13) away from the circular plate (12) is fixedly connected to the guide plate (10).

6. The flow velocity measuring device based on magnetic levitation according to claim 1, characterized in that: The circular plate (12) is made of an iron sheet, and the number of the dredging rods (15) is multiple.

7. The flow velocity measuring device based on magnetic levitation according to claim 1, characterized in that: The side surface of the ball (19) contacts the filter screen (16), and the end of the mounting shaft (18) away from the ball (19) is fixedly connected to a limit plate (20), and the side surface of the limit plate (20) contacts the side inner wall of the round rod (17).

8. The flow velocity measuring device based on magnetic levitation according to claim 7, characterized in that: A second spring (21) is fixedly connected to the side surface of the limiting plate (20), and one end of the second spring (21) away from the limiting plate (20) is fixedly connected to the round rod (17).

9. The flow velocity measuring device based on magnetic levitation according to claim 1, characterized in that: The magnetic suspension flow rate measuring instrument (2) is internally provided with a plurality of groups of inner magnetic rings and outer magnetic rings.

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