CN114993393B - High-precision electromagnetic flowmeter - Google Patents
High-precision electromagnetic flowmeter Download PDFInfo
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- CN114993393B CN114993393B CN202210840980.0A CN202210840980A CN114993393B CN 114993393 B CN114993393 B CN 114993393B CN 202210840980 A CN202210840980 A CN 202210840980A CN 114993393 B CN114993393 B CN 114993393B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/04—Heating arrangements using electric heating
- F26B23/06—Heating arrangements using electric heating resistance heating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/18—Supports or connecting means for meters
- G01F15/185—Connecting means, e.g. bypass conduits
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- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
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Abstract
The invention relates to the technical field of flow meters, in particular to a high-precision electromagnetic flow meter, which comprises a metering pipeline and a converter connected with the metering pipeline, wherein an electrode rod is further arranged on the inner wall of the metering pipeline, the top of the metering pipeline is fixedly connected with the converter through a connector, a liquid inlet connector is arranged at one end of the metering pipeline, a liquid discharge connector is arranged at the other end of the metering pipeline, a first channel, a second channel and a third channel are further sequentially arranged on the inner wall of the metering pipeline from left to right, an adjusting assembly for adjusting the liquid level height of the second channel is further arranged at the top of the second channel, and a sealing structure is arranged at the joint of the electrode rod and the metering pipeline; when the metering pipeline is used for conveying liquid, the conveying amount of bubbles can be reduced, the detection precision is improved, in addition, the dryness of the environment at the joint of the converter and the metering pipeline can be ensured, and the sealing property between the electrode rod and the metering pipeline is improved.
Description
Technical Field
The invention relates to the technical field of flowmeters, in particular to a high-precision electromagnetic flowmeter.
Background
The electromagnetic flowmeter is born in the middle of the fifties of the last century, and quickly becomes one of the most practical detecting instruments in the industry by virtue of the advantages of convenience, accuracy and the like, and some highly new technologies such as microelectronic technology, computer technology and the like which are popular at the time are gradually added in the subsequent development, so that the development steps, the gradual aging and the systematization of the era are always followed, and the electromagnetic flowmeter is always ahead of other detecting instruments no matter whether the software technology or the hardware technology is adopted. The rapid development of the technology era is that the updating speed of the electromagnetic flowmeter is gradually unable to meet the detection requirements of the information technology era despite the continuous updating.
The structure of the electromagnetic flowmeter mainly comprises an electromagnetic coil, a measuring pipe section, a measuring electrode rod, a shell, a lining, a converter and the like, wherein when liquid is conveyed, a flow velocity measuring part is based on Faraday's law of electromagnetic induction, and when magnetic flux in a certain fixed area after electrification is changed, potential difference can be generated at an electrode at the moment, so that induced electromotive force is generated, and the flow velocity of the fluid is measured.
The conventional electromagnetic flow meter has not been able to meet the current detection requirements, mainly due to the following drawbacks of the conventional electromagnetic flow meter:
(1) Objects such as liquid, vapor and the like containing more bubbles cannot be accurately detected;
(2) Since the electromagnetic flow velocity has a direct influence on the accuracy of detection, a sufficiently long straight tube section must be ensured in order to ensure the electromagnetic flow velocity.
(3) In the working process of the electromagnetic flowmeter, because the electrode rod of the electromagnetic flowmeter is positioned in the measuring pipeline, the joint of the electrode rod and the measuring pipeline is not tight, a damp environment is easily formed in the cavity, the damp environment influences the measuring precision of the electromagnetic flowmeter, and the service life of the electromagnetic flowmeter is shortened.
In order to solve the technical problem, a high-precision electromagnetic flowmeter is introduced.
Disclosure of Invention
In view of the above, the present invention provides a high-precision electromagnetic flowmeter, which not only can improve the accuracy of measuring the liquid containing more bubbles, but also can ensure the dryness of the environment at the joint between the converter and the measuring pipeline, and improve the sealing property between the electrode rod and the measuring pipeline.
In order to solve the technical problems, the invention provides a high-precision electromagnetic flowmeter which comprises a metering pipeline and a converter connected with the metering pipeline, wherein an electrode rod is further arranged on the inner wall of the metering pipeline, the top of the metering pipeline is fixedly connected with the converter through a connector, a liquid inlet connector is arranged at one end of the metering pipeline, a liquid discharge connector is arranged at the other end of the metering pipeline, and a first channel, a second channel and a third channel are sequentially arranged on the inner wall of the metering pipeline from left to right;
the electrode rod comprises a first channel, a second channel, a third channel, an electrode rod and a liquid discharge joint, wherein the first channel is communicated with the liquid inlet joint, the third channel is communicated with the liquid discharge joint, one end, close to the liquid inlet joint, of the first channel is arranged obliquely upwards, the second channel is arranged in the vertical direction, the third channel is arranged in the horizontal direction, the electrode rod is arranged on the inner wall of the third channel, and the height of the top end of the second channel is larger than that of the third channel.
Furthermore, an adjusting component for adjusting the liquid level height of the second channel is further arranged at the top of the second channel;
the adjusting assembly comprises a sealing plate arranged on the inner wall of the second channel and an installation block fixedly arranged at the top of the second channel, a lead screw is arranged on the inner wall of the installation block in a penetrating manner, and the bottom end of the lead screw extends into the second channel and is rotatably connected with the sealing plate.
Furthermore, an arc-shaped groove is further formed in the inner wall of the second channel, the height of the bottommost part of the arc-shaped groove is flush with the top of the third channel, and an arc-shaped protrusion is further arranged on the outer wall of the sealing plate and matched with the arc-shaped groove.
Furthermore, the material of arc arch is rubber, and rubber can take place deformation when the extrusion, uses in a flexible way, installation piece bottom and measurement pipeline junction still are equipped with seal ring.
Furthermore, a first cavity for installing the electrode rod is further formed in the inner wall of the connector, and a drying assembly for enabling the first cavity and the converter to keep a dry environment is arranged in the first cavity;
the drying component comprises a fixing plate fixedly mounted on the inner wall of the first cavity, a drying agent is arranged above the fixing plate, and an electric heating rod is fixedly connected below the fixing plate.
Further, the junction of electrode pole and measurement pipeline is equipped with seal structure, the electrode pole is worn to establish at measurement pipeline inner wall, seal structure is including setting up first spacing groove, the second spacing groove at electrode pole and measurement pipeline junction, and first spacing groove is located the top of second spacing groove, the electrode pole outer wall is equipped with the stair structure who uses with first spacing groove, the cooperation of second spacing groove respectively, the length of second spacing groove is less than the length of first spacing groove, and the spacing inslot wall of second is equipped with the sealing washer.
Furthermore, the sealing structure further comprises a movable sleeve tightly connected with the outer wall of one end of the inner side of the electrode rod, a third cavity used for installing the movable sleeve is formed in the inner wall of the metering pipeline, a second cavity is reserved on the inner side of the movable sleeve and communicated with the outer wall of the electrode rod, and a sealing sleeve is installed on the inner wall of the second cavity.
Furthermore, the second cavity and the seal sleeve are the same in cross-sectional view and are both T-shaped, when the movable sleeve moves upwards, the top of the seal sleeve is tightly pressed with the metering pipeline and deforms to be in close contact with the outer wall of the electrode rod, and the sealing performance is guaranteed.
The technical scheme of the invention has the following beneficial effects:
1. according to the invention, the first channel, the second channel and the third channel are arranged on the inner wall of the metering pipeline, the first channel is obliquely arranged, the second channel is arranged along the vertical direction, the third channel is arranged along the horizontal direction, and the height of the top end of the second channel is larger than that of the third channel, so that when liquid with bubbles passes through the first channel, the bubbles can float upwards along the oblique direction, the bubbles are reduced from entering the second channel and the third channel, when the liquid with a small amount of bubbles enters the second channel, the bubbles can float upwards, the bubble transmission amount is further reduced, and under the condition that the second channel is fully loaded, the third channel can continuously keep a full-filling state, and the third channel plays a role in stable transmission.
2. According to the invention, the adjusting assembly is arranged at the top of the second channel, and when the conveyed liquid does not contain bubbles, the sealing plate can be adjusted to be at the same level with the third channel by rotating the screw rod, so that the transmission efficiency is ensured, and the use is flexible; through setting up arc wall and arc arch, can guarantee the leakproofness between second passageway and the closing plate.
3. According to the invention, by arranging the drying component, the dryness of the joint of the converter and the metering pipeline can be ensured in the use process of the electromagnetic flowmeter, the desiccant can absorb moisture in the air, and the electric heating rod is arranged, so that when the moisture is high, the first cavity can be kept dry by starting the electric heating rod for heating, and the service life of the electromagnetic flowmeter is prolonged.
4. According to the invention, by arranging the first limiting groove, the second limiting groove, the movable sleeve, the sealing ring and the sealing sleeve, when the metering pipeline is used for conveying liquid, the movable sleeve can move upwards under the action of water pressure, when the movable sleeve moves upwards, the top of the sealing sleeve is tightly pressed with the metering pipeline and deforms to be in tight contact with the outer wall of the electrode rod, so that the sealing property is ensured, in addition, in the process of pressing the sealing sleeve, as the electrode rod is fixedly connected with the movable sleeve and moves upwards synchronously with the sealing sleeve, the motor rod can be more tightly attached to the second limiting groove, the sealing ring can be gradually pressed, namely, when the pressure is higher, the sealing property is better, so that impurities or water can be prevented from entering the first cavity, and the detection precision is ensured.
Drawings
FIG. 1 is a schematic view of the axial measurement configuration of the present invention;
FIG. 2 is a schematic structural view of a front view of the present invention;
FIG. 3 is a schematic sectional view of a metering conduit according to the present invention;
FIG. 4 is a schematic view of the connection of the electrode rod to the metering tube according to the present invention;
FIG. 5 is an enlarged schematic view of the structure at A in FIG. 3;
fig. 6 is an enlarged schematic view of the structure at B in fig. 3.
In the figure: 1. a metering conduit; 2. a converter; 3. a liquid inlet joint; 4. a liquid discharge joint; 5. a first channel; 6. a second channel; 7. a third channel; 8. an electrode rod; 9. a first cavity; 10. a connector; 11. a movable sleeve; 12. a second cavity; 13. sealing sleeves; 14. a first limit groove; 15. a second limit groove; 16. a seal ring; 17. sealing plates; 18. an arc-shaped bulge; 19. an arc-shaped slot; 20. mounting blocks; 21. a screw rod; 22. a sealing gasket; 23. a fixing plate; 24. a desiccant; 25. an electrical heating rod; 26. a third cavity.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 6 of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the description of the embodiments of the invention given above, are within the scope of protection of the invention.
The conventional electromagnetic flow meter has not been able to meet the current detection requirements, mainly due to the following drawbacks of the conventional electromagnetic flow meter:
1. objects such as liquid, vapor and the like containing more bubbles cannot be accurately detected;
2. since the electromagnetic flow velocity has a direct influence on the accuracy of detection, a sufficiently long straight tube section must be ensured in order to ensure the electromagnetic flow velocity.
3. In the working process of the electromagnetic flowmeter, because the electrode rod of the electromagnetic flowmeter is positioned in the measuring pipeline, the joint of the electrode rod and the measuring pipeline is not sealed tightly, a damp environment is easily formed in the cavity, the damp environment influences the measuring precision of the electromagnetic flowmeter, and the service life of the electromagnetic flowmeter is shortened.
In order to solve the above problems, as shown in fig. 1 to 6: the high-precision electromagnetic flowmeter comprises a metering pipeline 1 and a converter 2 connected with the metering pipeline 1, wherein the top of the metering pipeline 1 is fixedly connected with the converter 2 through a connector 10, an electrode rod 8 is further arranged on the inner wall of the metering pipeline 1, a liquid inlet connector 3 is arranged at one end of the metering pipeline 1, a liquid discharge connector 4 is arranged at the other end of the metering pipeline 1, a first channel 5, a second channel 6 and a third channel 7 are further arranged on the inner wall of the metering pipeline 1 from left to right in sequence, the diameters of the first channel 5, the second channel 6 and the third channel 7 are the same, the first channel 5 is communicated with the liquid inlet connector 3, the third channel 7 is communicated with the liquid discharge connector 4, one end, close to the liquid inlet connector 3, of the first channel 5 is obliquely arranged upwards, the second channel 6 is arranged in the vertical direction, the third channel 7 is arranged in the horizontal direction, the electrode rod 8 is arranged on the inner wall of the third channel 7, the top end of the second channel 6 is larger than the height of the third channel 7, and preferably, the middle of the third channel 7 is communicated with the middle of the second channel 6.
In the embodiment, the first channel 5, the second channel 6 and the third channel 7 are arranged on the inner wall of the metering pipeline 1, the first channel 5 is obliquely arranged, the second channel 6 is arranged in the vertical direction, the third channel 7 is arranged in the horizontal direction, and the height of the top end of the second channel 6 is larger than that of the third channel 7, when liquid with bubbles passes through the first channel 5, the bubbles float upwards in the oblique direction under the action of buoyancy, so that the bubbles are prevented from entering the second channel 6 and the third channel 7, when the liquid with a small amount of bubbles enters the second channel 6, the bubbles float upwards under the action of the buoyancy, the transmission amount of the bubbles is further reduced, and under the condition that the second channel 6 is fully loaded, the third channel 7 can continuously keep a full-filling state, and the third channel 7 plays a role in stable transmission.
According to an embodiment of the present invention, as shown in fig. 3 and 5, an adjusting assembly for adjusting the liquid level of the second channel 6 is further disposed at the top of the second channel 6, the adjusting assembly includes a sealing plate 17 disposed on the inner wall of the second channel 6 and an installation block 20 fixedly installed at the top of the second channel 6, a sealing washer 22 is further disposed at a joint of the bottom of the installation block 20 and the metering pipeline 1, the sealing washer 22 is disposed to ensure the stability of connection between the installation block 20 and the metering channel, the sealing plate 17 is slidably connected to the second channel 6, a screw 21 is disposed through the inner wall of the installation block 20, the bottom end edge of the screw 21 extends into the second channel 6 and is rotatably connected to the sealing plate 17, when the screw 21 is rotated, the sealing plate 17 slides up and down along the inner wall of the second channel 6, and further, the height of the second channel 6 is controlled; arc groove 19 has still been seted up to 6 inner walls in second passageway, the height of arc groove 19 bottommost and third passageway 7 top parallel and level, closing plate 17 outer wall still is equipped with arc arch 18, arc arch 18 and arc groove 19 looks adaptation, the protruding material of arc 18 is rubber, when arc arch 18 installs when arc groove 19 inner walls, rotates lead screw 21, arc arch 18 can take place deformation this moment, arc arch 18 can with 6 in close contact with in second passageway this moment, guarantee good leakproofness.
In the embodiment, the adjusting assembly is arranged at the top of the second channel 6, and when the delivered liquid does not contain bubbles, the sealing plate 17 can be adjusted to be at the position flush with the third channel 7 by rotating the screw rod 21, so that the transmission efficiency is ensured, and the use is flexible; by providing the arc-shaped groove 19 and the arc-shaped projection 18, the sealing property between the second passage 6 and the sealing plate 17 can be ensured.
In addition, in the embodiment, by adjusting the liquid level height of the second channel 6, when the electromagnetic flowmeter is vertically arranged, the transmission effect of the first channel 5, the second channel 6 and the third channel 7 is not affected, and good circulation can be ensured.
According to another embodiment of the present invention, as shown in fig. 3 and fig. 6, the inner wall of the connecting head 10 is further provided with a first cavity 9 for installing the electrode rod 8, and a drying component for keeping the first cavity 9 and the converter 2 in a dry environment is arranged in the first cavity 9; the drying component comprises a fixing plate 23 fixedly mounted on the inner wall of the first cavity 9, a drying agent 24 is arranged above the fixing plate 23, an electric heating rod 25 is fixedly connected to the lower portion of the fixing plate 23, and the type of the electric heating rod 25 can be selected properly according to the diameter of the metering pipeline 1.
This embodiment, through setting up dry subassembly, at the in-process that electromagnetic flowmeter is using, can guarantee the degree of dryness of converter 2 and measurement pipeline 1 junction, moisture in the drier 24 can absorb the air, and the setting of electrical heating rod 25, when the humidity is higher, the accessible is opened electrical heating rod 25 and is heated, plays the stoving effect, makes first cavity 9 keep dry, extension electromagnetic flowmeter's life.
In an embodiment of the present invention, as shown in fig. 3 and 4, a sealing structure is provided at a connection portion of the electrode rod and the metering pipe 1, the electrode rod 8 penetrates through an inner wall of the metering pipe 1, the sealing structure includes a first limiting groove 14 and a second limiting groove 15 provided at the connection portion of the electrode rod 8 and the metering pipe 1, the first limiting groove 14 is located above the second limiting groove 15, a stepped structure is provided on an outer wall of the electrode rod 8 and is respectively used in cooperation with the first limiting groove 14 and the second limiting groove 15, a length of the second limiting groove 15 is smaller than a length of the first limiting groove 14, and a sealing ring 16 is provided on an inner wall of the second limiting groove 15, and by setting the length of the second limiting groove 15 to be smaller than the length of the first limiting groove 14, since the electrode rod 8 moves upward in a process of compressing the sealing sleeve 13, a movement margin of the electrode rod 8 is ensured.
In this embodiment, the first limit groove 14, the second limit groove 15, and the seal ring 16 are provided, so that the sealing property between the electrode rod 8 and the metering pipe 1 can be ensured.
In addition, in order to further improve the sealing performance, the outer wall of one end of the inner side of the electrode rod 8 is also closely connected with a movable sleeve 11, a third cavity 26 used for installing the movable sleeve 11 is formed in the inner wall of the metering pipeline 1, the movable sleeve 11 can slide on the inner wall of the third cavity 26, a second cavity 12 is reserved on the inner side of the movable sleeve 11, the second cavity 12 is communicated with the outer wall of the electrode rod 8, a sealing sleeve 13 is installed on the inner wall of the second cavity 12, and the section views of the second cavity 12 and the sealing sleeve 13 are the same and are both in a T shape.
The working principle of the invention is as follows:
when the electromagnetic flowmeter works, the electromagnetic flowmeter is arranged along the horizontal direction and is respectively communicated with a conveying pipeline through the liquid inlet joint 3 and the liquid discharge joint 4, and liquid flows through the first channel 5, the second channel 6 and the third channel 7 in sequence and is discharged from the liquid discharge joint 4 when flowing in the metering pipeline 1.
When liquid with bubbles passes through the first channel 5, the bubbles float upwards in the inclined direction, so that the bubbles are reduced to enter the second channel 6 and the third channel 7, when the liquid with a small number of bubbles enters the second channel 6, the bubbles float upwards, the transmission amount of the bubbles is further reduced, and under the condition that the second channel 6 is fully loaded, the third channel 7 can be continuously kept in a full-filling state, meanwhile, the effect of stable transmission is achieved for the third channel 7, and the length of the third channel 7 does not need to be prolonged.
When the liquid to be conveyed does not contain air bubbles, the sealing plate 17 can be adjusted to be at the position flush with the top of the third channel 7 by rotating the screw rod 21, so that the transmission efficiency is ensured, and the use is flexible.
Under the normal condition, the seal cover is contact state with measurement pipeline 1, electrode rod 8 also is contact state with sealing washer 16 simultaneously, at the in-process of carrying liquid, under hydraulic effect, movable sleeve 11 can the rebound, when movable sleeve 11 upwards removes, seal cover 13 top compresses tightly and takes place deformation and 8 outer wall in close contact with of electrode rod with measurement pipeline 1, guarantee the leakproofness, in addition at the in-process that seal cover 13 compresses tightly, because electrode rod 8 and 11 fixed connection of movable sleeve, electrode rod 8 follows the synchronous rebound of movable sleeve 11, this moment motor rod 8 can closely laminate with the 16 bottoms of sealing washer in the spacing groove 15 of second more, sealing washer 16 also can compress tightly gradually, namely, when pressure is big more, the leakproofness is better, can avoid impurity or water to enter into in the first cavity 9 better, guarantee to detect the precision.
In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly attached, detachably attached, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
While the foregoing is directed to the preferred embodiment of the present invention, it will be appreciated by those skilled in the art that various changes and modifications may be made therein without departing from the principles of the invention as set forth in the appended claims.
Claims (5)
1. The utility model provides a high accuracy electromagnetic flowmeter, includes measurement pipeline (1) and converter (2) be connected with measurement pipeline (1), measurement pipeline (1) inner wall still is equipped with electrode rod (8), its characterized in that: the top of the metering pipeline (1) is fixedly connected with the converter (2) through a connector (10), one end of the metering pipeline (1) is provided with a liquid inlet connector (3), the other end of the metering pipeline (1) is provided with a liquid discharge connector (4), and the inner wall of the metering pipeline (1) is sequentially provided with a first channel (5), a second channel (6) and a third channel (7) from left to right;
the liquid inlet connector (3) is communicated with the first channel (5), the third channel (7) is communicated with the liquid discharge connector (4), one end, close to the liquid inlet connector (3), of the first channel (5) is arranged obliquely upwards, the second channel (6) is arranged in the vertical direction, the third channel (7) is arranged in the horizontal direction, the electrode rod (8) is arranged on the inner wall of the third channel (7), and the height of the top end of the second channel (6) is larger than that of the third channel (7);
the top of the second channel (6) is also provided with an adjusting component for adjusting the liquid level of the second channel (6);
the adjusting assembly comprises a sealing plate (17) arranged on the inner wall of the second channel (6) and an installation block (20) fixedly installed at the top of the second channel (6), a screw rod (21) penetrates through the inner wall of the installation block (20), and the bottom end edge of the screw rod (21) extends into the second channel (6) and is rotatably connected with the sealing plate (17);
the electrode rod (8) is provided with a sealing structure at the joint of the electrode rod (8) and the metering pipeline (1), the electrode rod (8) penetrates through the inner wall of the metering pipeline (1), the sealing structure comprises a first limiting groove (14) and a second limiting groove (15) which are arranged at the joint of the electrode rod (8) and the metering pipeline (1), the first limiting groove (14) is positioned above the second limiting groove (15), the outer wall of the electrode rod (8) is provided with a stepped structure which is respectively matched with the first limiting groove (14) and the second limiting groove (15) for use, the length of the second limiting groove (15) is smaller than that of the first limiting groove (14), and a sealing ring (16) is arranged on the inner wall of the second limiting groove (15);
the sealing structure further comprises a movable sleeve (11) tightly connected with the outer wall of one end of the inner side of the electrode rod (8), a third cavity (26) used for installing the movable sleeve (11) is formed in the inner wall of the metering pipeline (1), a second cavity (12) is reserved in the inner side of the movable sleeve (11), the second cavity (12) is communicated with the outer wall of the electrode rod (8), and a sealing sleeve (13) is installed on the inner wall of the second cavity (12).
2. A high accuracy electromagnetic flowmeter as set forth in claim 1 wherein: the inner wall of the second channel (6) is further provided with an arc-shaped groove (19), the bottommost height of the arc-shaped groove (19) is flush with the top of the third channel (7), the outer wall of the sealing plate (17) is further provided with an arc-shaped protrusion (18), and the arc-shaped protrusion (18) is matched with the arc-shaped groove (19).
3. A high accuracy electromagnetic flowmeter as set forth in claim 2 wherein: the arc-shaped bulge (18) is made of rubber, and a sealing gasket (22) is further arranged at the joint of the bottom of the mounting block (20) and the metering pipeline (1).
4. A high accuracy electromagnetic flowmeter as set forth in claim 1 wherein: the inner wall of the connector (10) is also provided with a first cavity (9) for mounting the electrode rod (8), and a drying component for keeping the first cavity (9) and the converter (2) in a dry environment is arranged in the first cavity (9);
the drying component comprises a fixing plate (23) fixedly mounted on the inner wall of the first cavity (9), a drying agent (24) is arranged above the fixing plate (23), and an electric heating rod (25) is fixedly connected below the fixing plate (23).
5. A high accuracy electromagnetic flowmeter as set forth in claim 1 wherein: the section view of second cavity (12) and seal cover (13) is the same, all is the T type, and when movable sleeve (11) rebound, seal cover (13) top compressed tightly and takes place deformation and electrode rod (8) outer wall in close contact with measurement pipeline (1), guarantees the leakproofness.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210840980.0A CN114993393B (en) | 2022-07-18 | 2022-07-18 | High-precision electromagnetic flowmeter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210840980.0A CN114993393B (en) | 2022-07-18 | 2022-07-18 | High-precision electromagnetic flowmeter |
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| CN114993393A CN114993393A (en) | 2022-09-02 |
| CN114993393B true CN114993393B (en) | 2022-11-18 |
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