CN115265681A

CN115265681A - Electromagnetic flowmeter with electrode cleaning function

Info

Publication number: CN115265681A
Application number: CN202210902429.4A
Authority: CN
Inventors: 李飞翔; 郭庆; 牛海军; 李凯
Original assignee: Shanxi Yuandaolihe Network Technology Co ltd
Current assignee: Shanxi Yuandaolihe Network Technology Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-11-01

Abstract

The invention discloses an electromagnetic flowmeter with an electrode cleaning function, which comprises a magnetic circuit conversion system, a shell, a lining, an automatic circulation cleaning mechanism and electrodes, wherein the magnetic circuit conversion system is arranged on the shell, the lining is internally tangent and concentrically arranged in the shell, the automatic circulation cleaning mechanism is arranged on the inner side of the lining in a sliding array mode, the electrodes symmetrically penetrate through the middle parts of two sides of the lining, the electromagnetic flowmeter belongs to the technical field of electromagnetic flowmeters, particularly, a scraper is driven by fluid to automatically clean the electrodes and the inner wall without external power and disassembly, meanwhile, the circulation motion of the scraper is consistent with water flow, and the influence of fluid disturbance can be reduced.

Description

Electromagnetic flowmeter with electrode cleaning function

Technical Field

The invention belongs to the technical field of electromagnetic flowmeters, and particularly relates to an electromagnetic flowmeter with an electrode cleaning function.

Background

Electromagnetic flow meters are inductive meters used to measure the volumetric flow of a conductive medium within a pipe. The flowmeter can adhere to dirt on the inner walls of the electrode and the lining in the long-term use process, the accuracy of measurement is influenced, so that the electrode and the lining need to be cleaned regularly, the flowmeter needs to be detached to clean the inner walls and the electrode under the common condition, the operation is complex, and the efficiency is low.

The electromagnetic flowmeter requires that the speed of the fluid in the pipeline is in axisymmetric distribution during use, the magnetic field is uniform, and when a cyclotron non-axisymmetric fluid appears, a cyclotron current can be generated, so that the electromagnetic flowmeter generates a large measurement error, therefore, when the electromagnetic flowmeter is actually installed and used, an upstream has enough straight pipe sections, and meanwhile, the pipe diameters of the upstream and the downstream are the same as that of the electromagnetic flowmeter, so that the speed of the current measured fluid is symmetrically distributed in a concentric circle.

CN111207800A discloses an adaptation is electromagnetic flowmeter for sewage treatment, including electromagnetic flowmeter body (1), electromagnetic flowmeter body (1) includes barrel (11) and is used for converter (12) that the signal of telecommunication was handled, its characterized in that: the inside of barrel (11) is provided with blowdown mechanism (2), converts the kinetic energy of fluid into rotatory mechanical energy, utilizes rotary mechanism to scrape off the dirt of electrode and lining inner wall, has solved the clearance of electrode and inner wall in this application, but rotary mechanism makes the fluid rotation of measurement department, produces great disturbance, forms asymmetric fluid, causes great measuring error.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the invention does not adopt external power and utilizes fluid to drive the scraper to automatically finish cleaning the electrode and the inner wall under the condition of not needing to be disassembled, and meanwhile, the circulating motion of the scraper is consistent with the water flow, thereby reducing the influence of fluid disturbance.

The technical scheme adopted by the invention is as follows: the invention provides an electromagnetic flowmeter with an electrode cleaning function, which comprises a magnetic circuit conversion system, a shell, a lining, an automatic circulation cleaning mechanism and electrodes, wherein the magnetic circuit conversion system is arranged on the shell, the lining is internally tangent and concentrically arranged in the shell, the automatic circulation cleaning mechanism is arranged on the inner side of the lining in a sliding array mode, and the electrodes symmetrically penetrate through the middle parts of two sides of the lining.

Further, the lining includes measuring aperture, insulation board and guide plate, the insulation board is located on the shell inner wall, the insulation board inner wall is located to the guide plate, the measuring aperture symmetry runs through and locates insulation board and guide plate middle part, the electrode is located in the measuring aperture, the hollow slide that runs through around insulation board and guide plate juncture array are equipped with, the array is equipped with the cableway of encircleing on the guide plate.

Furthermore, in order to enable the automatic circulating cleaning mechanism to move in the hollow slide way, the symmetry axis of the cableway is arranged on the symmetry plane of the hollow slide way, the upper part of the cableway is arranged on the lower wall of the hollow slide way, and the lower part of the cableway is arranged on the inner wall of the guide plate.

Further, in order to enable the automatic circulation cleaning mechanism to turn at the front end part and the rear end part of the guide plate, the lengths of the two ends of the insulation plate are larger than those of the two ends of the guide plate.

Further, the automatic circulation cleaning mechanism comprises a rope shaft, a sliding turning pin and a scraper component, wherein the rope shaft is arranged in the ropeway in a sliding mode, the sliding turning pin is fixedly arranged on the rope shaft, and the scraper component is hinged to the sliding turning pin.

Further, the sliding turning pin comprises a sliding spherical shell, a base, a supporting rod and a ball head, the sliding spherical shell is fixedly arranged on the rope shaft, the base is arranged below the sliding spherical shell, a through hole is formed in the middle of the base along the direction of the rope shaft, the supporting rod is arranged in the through hole, and the ball head is symmetrically arranged on two side walls of the base.

Further, in order to enable the sliding turning pin to slide in the cableway, the spherical diameter of the sliding spherical shell is the same as the diameter of the section of the cableway.

Further, in order to make the scraper blade subassembly can shrink in hollow slide and slide, the scraper blade subassembly includes left scraper blade, right scraper blade, second scraper blade, third scraper blade, universal connecting rod and pin, the articulated bracing piece middle part of locating of pin one end, the articulated below of locating the one end of bracing piece is kept away from to left side scraper blade, the articulated top of locating the one end of bracing piece is kept away from to right side scraper blade in the pin, the articulated left scraper blade of locating of second scraper blade, the articulated second scraper blade of locating on the second scraper blade of third scraper blade, the one end mirror image that left scraper blade was kept away from to right side scraper blade is equipped with second scraper blade and third scraper blade, universal connecting rod one end symmetry ball pivot is connected and is located on the bulb, universal connecting rod keeps away from bulb one end symmetry ball pivot and is connected and is located on left scraper blade and the right scraper blade, and wherein the outer wall of left scraper blade, right scraper blade, second scraper blade and third scraper blade all is equipped with the rubber layer, avoids inner wall and electrode to cause the damage.

Further, strike off guide plate inner wall foreign matter for making the scraper blade subassembly better, left side scraper blade is kept away from right scraper blade lateral wall lower part and is equipped with left spacing slope, right side scraper blade is kept away from left scraper blade lateral wall lower part and is equipped with right spacing slope, the second scraper blade is close to third scraper blade lateral wall lower part and is equipped with the spacing slope of second, when second scraper blade and third scraper blade reachd the limit point, the outer circular arc radius of scraper blade subassembly is the same with guide plate inner wall radius.

The invention adopting the structure has the following beneficial effects:

1. through the setting of scraper blade subassembly, when the fluid in the pipeline flows through the lining, a part of fluid flows into the guide plate hole, a part of fluid flows into in the hollow slide, the scraper blade subassembly atress of the interior expansion state of guide plate is greater than the scraper blade subassembly of the interior contraction state of hollow slide, so the scraper blade subassembly in the guide plate moves along the fluid direction, scraper blade subassembly in the hollow slide then receives the pulling force of cableway to flow against the fluid direction and removes, the scraper blade subassembly is hugged closely the lining inner wall and is scraped the foreign matter this moment, will inlay simultaneously and strike off at the electrode tip foreign matter of lining inner wall, realized under the condition that does not additionally increase output power, utilize hydrodynamic force both to clear up the electrode, the effect of lining inner wall has been cleared up again.

2. Through the arrangement of the hollow slide way and the cableway, the automatic circulating cleaning mechanism can realize circulating cleaning along the fluid direction by utilizing the retractable scraper component and the hinged and reversible sliding turning pin, asymmetric fluid cannot be generated, the rotation of the fluid cannot be caused, the rotation current cannot be generated, and the measuring precision of the electromagnetic flowmeter is slightly influenced by the change of water flow.

Drawings

Fig. 1 is a schematic structural diagram of an electromagnetic flowmeter with an electrode cleaning function according to the present invention;

FIG. 2 is a schematic view showing the arrangement of the scraper blade assembly of an electromagnetic flowmeter with an electrode cleaning function according to the present invention;

FIG. 3 is a front view of a liner of an electromagnetic flow meter with electrode cleaning in accordance with the present invention;

FIG. 4 isbase:Sub>A cross-sectional view A-A of FIG. 3;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;

FIG. 6 is an enlarged view of portion I of FIG. 5;

FIG. 7 is a schematic distribution diagram of an automatic circulation cleaning mechanism of an electromagnetic flowmeter with an electrode cleaning function according to the present invention;

FIG. 8 is a schematic structural diagram of an automatic circulation cleaning mechanism of an electromagnetic flowmeter with an electrode cleaning function according to the present invention;

FIG. 9 is an enlarged view of portion II of FIG. 8

FIG. 10 is a front view of a blade assembly of an electromagnetic flowmeter having an electrode cleaning function according to the present invention;

FIG. 11 is a rear view of a blade assembly of an electromagnetic flowmeter having an electrode cleaning function in accordance with the present invention;

FIG. 12 is a state diagram of a blade assembly of an electromagnetic flowmeter having an electrode cleaning function according to the present invention;

FIG. 13 is a schematic structural diagram of a sliding direction-changing pin of an electromagnetic flowmeter with an electrode cleaning function according to the present invention;

the device comprises a magnetic circuit conversion system 1, a magnetic circuit conversion system 2, a shell 3, a lining 4, an automatic circulation cleaning mechanism 5, electrodes 6, a hollow slideway 7, a cableway 8, a measuring hole 9, an insulating plate 10, a guide plate 11, a rope shaft 12, a scraper component 13, a left scraper 14, a right scraper 15, a second scraper 16, a third scraper 17, a right limit slope 18, a left limit slope 19, a second limit slope 20, a sliding direction-changing pin 21, a universal connecting rod 22, a pull rod 23, a sliding spherical shell 24, a base 25, a supporting rod 26, a ball head 27 and a through hole.

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

As shown in fig. 1, fig. 2 and fig. 7, the electromagnetic flowmeter with an electrode cleaning function according to the present invention includes a magnetic circuit switching system 1, a case 2, a liner 3, an automatic circulation cleaning mechanism 4 and electrodes 5, wherein the magnetic circuit switching system 1 is disposed on the case 2, the liner 3 is concentrically disposed inside the case 2, the automatic circulation cleaning mechanism 4 is slidably disposed inside the liner 3, and the electrodes 5 are symmetrically disposed through the middle portions of both sides of the liner 3.

As shown in fig. 2-6, the lining 3 includes a measuring hole 8, an insulating plate 9 and a guide plate 10, the insulating plate 9 is disposed on the inner wall of the shell 2, the guide plate 10 is disposed on the inner wall of the insulating plate 9, the measuring hole 8 is symmetrically penetrated through the middle of the insulating plate 9 and the guide plate 10, the electrode 5 is disposed in the measuring hole 8, the hollow slideway 6 which is penetrated through from front to back is disposed at the junction array of the insulating plate 9 and the guide plate 10, the cableway 7 which surrounds the upper array of the guide plate 10 is disposed on the front and back end portions of the guide plate 10, the length of the two ends of the insulating plate 9 is greater than that of the two ends of the guide plate 10, the cableway 7 is disposed in the hollow slideway 6 for moving the automatic circulation cleaning mechanism 4, the symmetry axis of the cableway 7 is disposed on the symmetry plane of the hollow slideway 6, the lower wall of the cableway 7 is disposed on the inner wall of the guide plate 10.

As shown in fig. 7, 8, 9 and 12, the automatic circulation cleaning mechanism 4 includes a rope shaft 11, a sliding direction-changing pin 20 and a scraper component 12, the rope shaft 11 is slidably disposed around the ropeway 7, the sliding direction-changing pin 20 is fixedly disposed on the rope shaft 11, and the scraper component 12 is hinged to the sliding direction-changing pin 20.

As shown in fig. 13, a sliding direction-changing pin 20 is fixedly arranged on the rope shaft 11, the sliding direction-changing pin 20 includes a sliding spherical shell 23, a base 24, a support rod 25 and a ball head 26, the sliding spherical shell 23 is fixedly arranged on the rope shaft 11, the base 24 is arranged under the sliding spherical shell 23, a through hole 27 is arranged in the middle of the base 24 along the direction of the rope shaft 11, the support rod 25 is arranged in the through hole 27, and the ball head 26 is symmetrically arranged on two side walls of the base 24.

As shown in fig. 6, in order to slide the slide direction changing pin 20 in the ropeway 7, the spherical diameter of the slide spherical shell 23 is the same as the cross-sectional diameter of the ropeway 7.

As shown in fig. 10, 11 and 12, in order to make the scraper component 12 slide in the hollow slideway 6 in a retractable manner, the scraper component 12 comprises a left scraper 13, a right scraper 14, a second scraper 15, a third scraper 16, a universal connecting rod 21 and a draw bar 22, one end of the draw bar 22 is hinged to the middle of the supporting rod 25, the left scraper 13 is hinged to the lower part of one end of the draw bar 22 far away from the supporting rod 25, the right scraper 14 is hinged to the upper part of one end of the draw bar 22 far away from the supporting rod 25, the second scraper 15 is hinged to the left scraper 13, the third scraper 16 is hinged to the second scraper 15, the second scraper 15 and the third scraper 16 are arranged on the mirror image of one end of the right scraper 14 far away from the left scraper 13, one end of the universal connecting rod 21 is symmetrically and spherically hinged to the ball head 26, the universal connecting rod 21 is connected with the left scraper 13 and the right scraper 14 in a symmetrical spherical hinge mode at one end far away from the ball head 26, in order to enable the scraper component 12 to better scrape foreign matters on the inner wall of the guide plate 10, the lower part of the side wall of the left scraper 13 far away from the right scraper 14 is provided with a left limit slope 18, the lower part of the side wall of the right scraper 14 far away from the left scraper 13 is provided with a right limit slope 17, the lower part of the side wall of the second scraper 15 close to the third scraper 16 is provided with a second limit slope 19, when the second scraper 15 and the third scraper 16 reach limit points, the outer circular arc radius of the scraper component 12 is the same as the radius of the inner wall of the guide plate 10, wherein the outer walls of the left scraper 13, the right scraper 14, the second scraper 15 and the third scraper 16 are all provided with soft rubber layers, and damage to the inner wall and the electrode 5 is avoided.

When the scraper component 12 is located on the inner wall of the guide plate 10 of the lining 3, the scraper component 12 is limited by the right limit slope 17, the left limit slope 18, the second limit slope 19 and the inner wall of the guide plate 10, the left scraper 13, the right scraper 14, the second scraper 15 and the third scraper 16 of the scraper component 12 are in a fully-unfolded state of a lower limit position, at this time, an opening of a base 24 of the sliding diversion pin 20 is downward, a ball head 26 is located on one side far away from the scraper component 12, the universal connecting rod 21 applies tension to two sides of the scraper component 12, the side walls of the left scraper 13 and the right scraper 14 of the scraper component 12 are parallel, an outer arc of the scraper component 12 is tightly attached to the inner wall of the guide plate 10, at this time, the unfolded area of the scraper component 12 is the maximum and is marked as S1;

when the scraper component 12 is located in the hollow slideway 6, the opening of the base 24 of the sliding diversion pin 20 is upward, the ball head 26 is located at one side close to the scraper component 12, the universal connecting rod 21 pushes the two sides of the scraper component 12, the left scraper 13 and the right scraper 14 of the scraper component 12 rotate and contract oppositely, the width of the left side and the right side of the scraper component 12 is smaller than the width of the hollow slideway 6, meanwhile, the radius of the arc at the lower side of the scraper component 12 is smaller than the radius of the lower wall of the hollow slideway 6, the second scraper 15 and the third scraper 16 are supported by the upward supporting force of the lower wall of the hollow slideway 6, the second scraper 15 is hinged and rotated upwards relative to the left scraper 13 and the right scraper 14, the third scraper 16 is hinged and rotated upwards relative to the second scraper 15, and the spreading area of the scraper component 12 is the minimum at this time and is marked as S2.

When fluid in a pipeline flows through the lining 3, a part of the fluid flows into an inner hole of the guide plate 10, a part of the fluid flows into the hollow slide way 6, the stress of the scraper component 12 in the guide plate 10 is recorded as F1, the stress of the scraper in the hollow slide way 6 is recorded as F2, and S1 is greater than S2, so that F1 is greater than F2, the scraper component 12 in the guide plate 10 moves along the fluid direction, in the moving process of the scraper component 12, the scraper component 12 scrapes foreign matters on the inner walls of the electrode 5 and the guide plate 10 clean, the scraper component 12 drives the sliding diversion pin 20 to slide along the cableway 7, the sliding diversion pin 20 drives the rope shaft 11 to slide along the cableway 7, and the cableway 7 drives the scraper component 12 in the hollow slide way 6 to move in the opposite direction of the fluid, so that the circulating cleaning movement of the scraper component 12 is realized.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An electromagnetic flowmeter with electrode cleaning function, includes shell (2), shell (2) lateral wall is equipped with magnetic circuit switching system (1), its characterized in that: the utility model discloses a clean environment protection device, including shell (2), shell (2) inner wall is equipped with lining (3), lining (3) are inscribe with shell (2) and set up with one heart, the inside array of lining (3) is equipped with self-loopa clean mechanism (4), lining (3) inside wall middle part symmetry runs through and is equipped with electrode (5).

2. An electromagnetic flow meter with an electrode cleaning function according to claim 1, characterized in that: liner (3) are including measuring hole (8), insulation board (9) and guide plate (10), insulation board (9) are located on shell (2) inner wall, insulation board (9) inner wall is located in guide plate (10), measuring hole (8) symmetry is run through and is located insulation board (9) and guide plate (10) middle part, electrode (5) are located in measuring hole (8), hollow slide (6) that run through around insulation board (9) and guide plate (10) juncture array are equipped with, the array is equipped with ropeway (7) of encircleing on guide plate (10).

3. An electromagnetic flow meter with an electrode cleaning function according to claim 2, characterized in that: the symmetry axis of the cableway (7) is arranged on the symmetry plane of the hollow slide way (6), the upper part of the cableway (7) is arranged on the lower wall of the hollow slide way (6), and the lower part of the cableway (7) is arranged on the inner wall of the guide plate (10).

4. An electromagnetic flow meter with an electrode cleaning function according to claim 3, characterized in that: the lengths of the two ends of the insulating plate (9) are greater than the lengths of the two ends of the guide plate (10).

5. An electromagnetic flow meter with an electrode cleaning function according to claim 4, characterized in that: automatic clean mechanism (4) of circulation includes rope shaft (11), slip diversion round pin (20) and scraper blade subassembly (12), rope shaft (11) slip ring is around locating in cableway (7), slip diversion round pin (20) are fixed to be located on rope shaft (11), scraper blade subassembly (12) are articulated to be located on slip diversion round pin (20).

6. An electromagnetic flow meter with an electrode cleaning function according to claim 5, characterized in that: slide diversion round pin (20) are including slip spherical shell (23), base (24), bracing piece (25) and bulb (26), slip spherical shell (23) are fixed to be located on rope shaft (11), slip spherical shell (23) are located down in base (24), base (24) middle part is equipped with through hole (27) along rope shaft (11) direction, bracing piece (25) are located in through hole (27), bulb (26) symmetry is located on base (24) both sides wall.

7. An electromagnetic flow meter with an electrode cleaning function according to claim 6, characterized in that: the sphere diameter of the sliding spherical shell (23) is the same as the diameter of the section of the cableway (7).

8. An electromagnetic flow meter with an electrode cleaning function according to claim 7, characterized in that: scraper blade subassembly (12) are including left scraper blade (13), right scraper blade (14), second scraper blade (15), third scraper blade (16), universal connecting rod (21) and pin (22), bracing piece (25) middle part is located in pin (22) one end is articulated, left side scraper blade (13) is articulated to be located pin (22) and is kept away from the below of the one end of bracing piece (25), right side scraper blade (14) is articulated to be located pin (22) and is kept away from the top of the one end of bracing piece (25), articulated on locating left scraper blade (13) of second scraper blade (15), articulated on locating second scraper blade (15) of third scraper blade (16), the one end mirror image that left scraper blade (13) was kept away from in right scraper blade (14) is equipped with second scraper blade (15) and third scraper blade (16), universal connecting rod (21) one end symmetry ball pivot is connected and is located on bulb (26), universal connecting rod (21) is kept away from bulb (26) one end symmetry ball pivot and is connected and is located on left scraper blade (13) and right scraper blade (14).

9. An electromagnetic flow meter with an electrode cleaning function according to claim 8, characterized in that: left side scraper blade (13) are kept away from right scraper blade (14) lateral wall lower part and are equipped with left spacing slope (18), left side scraper blade (13) lateral wall lower part is kept away from in right side scraper blade (14) and is equipped with right spacing slope (17), second scraper blade (15) are close to third scraper blade (16) lateral wall lower part and are equipped with second spacing slope (19), the outer circular arc radius of scraper blade subassembly (12) is the same with guide plate (10) inner wall radius.