CN112229458A

CN112229458A - Electromagnetic flowmeter

Info

Publication number: CN112229458A
Application number: CN202011337751.4A
Authority: CN
Inventors: 林浩; 凤志龙
Original assignee: Shanghai Yinuo Instrument Co Ltd
Current assignee: Shanghai Yinuo Instrument Co Ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-01-15

Abstract

The invention relates to the technical field of measuring instruments and discloses an electromagnetic flowmeter. The electromagnetic flowmeter comprises a core assembly, a connector, an integrating instrument and a double-end flange, wherein the core assembly comprises a shell and a detection component, and the detection component is arranged in the shell; the connector is provided with a stepped hole, a stepped side wall is arranged on the outer side of the shell, the shell is inserted into the stepped hole, the stepped surface of the stepped side wall abuts against the stepped surface of the stepped hole, a small-diameter section of the stepped side wall is provided with a locking nut, and the locking nut is in threaded connection with the shell and abuts against the end part of the stepped hole; the integrating instrument is installed to double-end flange one end, and the other end is installed in the shoulder hole and is kept away from lock nut one end, and the determine module electric connection is in the integrating instrument. The electromagnetic flowmeter is reasonable in design, simple and novel in structure and reliable in work, and due to the adoption of the core body assembly plug-in structure, the electromagnetic flowmeter is convenient to process, manufacture, install and maintain, can obtain a good effect in the flow metering work of the conductive fluid, and is wide in application field.

Description

Electromagnetic flowmeter

Technical Field

The invention relates to the technical field of measuring instruments, in particular to an electromagnetic flowmeter.

Background

In the production and operation process of petroleum, chemical industry and other industries, a conductive fluid flow meter is required to measure the flow of a working medium in a closed pipeline. At present, the conductive fluid flow meter used on site has a complex structure, is high in manufacturing cost and difficult to machine, and is easy to block in the using and running process, so that the normal production and running of liquid flow metering and pipeline devices are influenced. In recent years, the inner cavity of an electromagnetic flowmeter which is researched and developed is provided with no rotating part, so that the problem of blocking is solved, but the electromagnetic flowmeter is difficult to assemble and disassemble structurally.

Based on this, there is a need for an electromagnetic flowmeter to solve the above existing problems.

Disclosure of Invention

Based on the above, the invention aims to provide an electromagnetic flowmeter which has the advantages of reasonable design, simple and novel structure, reliable work, convenient processing, manufacturing, installation and maintenance due to the adoption of a core assembly plug-in structure, good effect in the flow metering work of conductive fluid and wide application field.

In order to achieve the purpose, the invention adopts the following technical scheme:

an electromagnetic flow meter comprising:

the core assembly comprises a shell and a detection component, wherein the detection component is arranged in the shell;

the connector is provided with a stepped hole, a stepped side wall is arranged on the outer side of the shell, the shell is inserted into the stepped hole, the stepped surface of the stepped side wall abuts against the stepped surface of the stepped hole, a small-diameter section of the stepped side wall is provided with a locking nut, and the locking nut is in threaded connection with the shell and abuts against the end part of the stepped hole;

integrating instrument and double-end flange, the integrating instrument is installed to double-end flange one end, and the other end is fixed in the shoulder hole is kept away from lock nut one end, determine module electric connection in the integrating instrument.

As a preferable technical solution of the electromagnetic flowmeter, a first liquid flow hole is provided in the housing, a second liquid flow hole matched with the first liquid flow hole is provided in a side wall of the stepped hole, and the detection module can detect a liquid flow rate in the first liquid flow hole.

As a preferable technical solution of the electromagnetic flowmeter, an insulating lining is provided in the first liquid flow hole.

As a preferred technical solution of the electromagnetic flowmeter, the detection assembly includes an electrode, a bushing, and a fastening nut, a first mounting groove is provided in the housing, a through hole is provided at the bottom of the first mounting groove, the through hole communicates with the first liquid flow hole, the electrode is mounted in the first mounting groove, and a first end of the electrode is inserted into the through hole and is disposed in the first liquid flow hole;

the first mounting groove is provided with internal threads, the bushing is mounted at one end, far away from the first liquid circulation hole, of the electrode, and the fastening nut is in threaded connection with the first mounting groove and tightly abuts against the bushing.

As a preferred technical scheme of an electromagnetic flowmeter, the second end of the electrode is provided with a screw, and a wiring harness of the integrating instrument sequentially penetrates through the double-headed flange, the fastening nut and the middle hole of the lining and is fixed at the second end of the electrode through the screw.

As a preferred technical scheme of the electromagnetic flowmeter, the electrodes, the bushings and the fastening nuts are two groups and are symmetrically arranged on two sides of the first liquid circulation hole, a wiring hole is arranged in the side wall of the shell, and the electrode, which is far away from one side of the integrating instrument, of the first liquid circulation hole is electrically connected to the integrating instrument through the wiring hole.

As a preferred technical scheme of the electromagnetic flowmeter, the detection assembly further comprises two magnetic pole parts, two second mounting grooves are formed in the outer side wall of the casing, the two second mounting grooves are symmetrically formed in two sides of the first liquid circulation hole, the magnetic pole parts are mounted in the second mounting grooves, and the magnetic pole parts are electrically connected to the integrating instrument through the wiring holes.

As a preferred technical scheme of the electromagnetic flowmeter, a positioning pin is further arranged between the shell and the connecting body.

As a preferred technical scheme of the electromagnetic flowmeter, a first sealing ring is arranged between the shell and the connecting body;

a second sealing ring is arranged in the electrode and the first mounting groove;

and a third sealing ring is arranged between the magnetic pole part and the side wall of the second mounting groove.

As a preferred technical scheme of the electromagnetic flowmeter, both ends of the connecting body are provided with connecting flanges.

The invention has the beneficial effects that:

the invention provides an electromagnetic flowmeter which comprises a core body assembly, a connecting body, an integrating instrument and a double-head flange. During assembly, the core assembly can be independently assembled, and the detection assembly is directly arranged in the shell; then the core body assembly is inserted into the stepped hole of the connecting body and is locked by the locking nut, so that the core body assembly and the connecting body are fixed; and finally, fixing the integrating instrument and the connecting body by using a double-end flange to finish the integral installation of the electromagnetic flowmeter. The electromagnetic flowmeter is reasonable in design, simple and novel in structure and reliable in work, and due to the adoption of the core body assembly plug-in structure, the electromagnetic flowmeter is convenient to process, manufacture, install and maintain, can obtain a good effect in the flow metering work of the conductive fluid, and is wide in application field.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a cross-sectional view of an electromagnetic flow meter provided in accordance with an embodiment of the present invention;

FIG. 2 is a partial cross-sectional structural view from a first perspective of an electromagnetic flow meter provided in accordance with an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a housing provided in accordance with an embodiment of the present invention;

fig. 4 is a partial structural cross-sectional view of a second perspective of an electromagnetic flowmeter provided in accordance with an embodiment of the present invention.

The figures are labeled as follows:

1. a core assembly; 11. a housing; 111. a first liquid flow aperture; 1111. an insulating liner; 112. a first mounting groove; 12. a detection component; 121. an electrode; 122. a bushing; 123. fastening a nut; 124. a screw; 125. a magnetic pole member; 1251. a magnetic pole; 1252. a field coil; 13. locking the nut; 14. a core body plug;

2. a linker; 21. a second liquid flow aperture; 22. a connecting flange;

3. an integrating instrument; 4. a double-ended flange; 5. a first seal ring; 6. a second seal ring; 7. a third seal ring; 8. and a positioning pin.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 to 4, the present embodiment provides an electromagnetic flowmeter including a core assembly 1, a connecting body 2, an integrator 3, and a double-headed flange 4.

Specifically, as shown in fig. 1, the core assembly 1 includes a housing 11 and a detection assembly 12, the detection assembly 12 being mounted in the housing 11; connector 2 is provided with the shoulder hole, and the casing 11 outside is provided with the ladder lateral wall, and casing 11 pegs graft in the shoulder hole, and the ladder face butt of ladder lateral wall in the ladder face of shoulder hole, and the path section of ladder lateral wall is provided with lock nut 13, and lock nut 13 threaded connection is in casing 11 and butt in the tip of shoulder hole, realizes the fixed between core assembly 1 and connector 2. Integrating instrument 3 is installed to double-end flange 4 one end, and the other end is fixed in the shoulder hole and is kept away from 13 one end of lock nut to the shutoff shoulder hole, simultaneously, detecting component 12 electric connection makes detecting component 12 can measure liquid flow in integrating instrument 3. During assembly, the core assembly 1 can be independently assembled, and the detection component 12 is directly arranged in the shell 11; then the core body assembly 1 is inserted into the stepped hole of the connecting body 2 and is locked by the locking nut 13, so that the core body assembly 1 and the connecting body 2 are fixed; and finally, fixing the integrating instrument 3 and the connecting body 2 by using the double-end flange 4 to finish the integral installation of the electromagnetic flowmeter. This embodiment reasonable in design, simple structure is novel, and the reliable operation owing to adopted 1 bayonet structure of core assembly, is convenient for manufacturing and installation maintenance, utilizes this electromagnetic flowmeter can obtain good effect in the work of conducting fluid flow measurement, and the application is wider.

Preferably, a first sealing ring 5 is arranged between the outer side wall of the housing 11 and the inner wall of the stepped hole of the connecting body 2, so that the sealing between the housing 11 and the stepped hole is realized. In this embodiment, one of the stepped side wall or the stepped hole is preferably provided with a seal ring installation groove for assembling the seal ring. The number of the first sealing rings 5 is three, the large-diameter section of the stepped side wall is provided with two first sealing rings 5, and the small-diameter section of the stepped side wall is provided with one first sealing ring 5, so that the sealing performance of the shell 11 is improved. Wherein, the sealing ring mounting groove of the large diameter section is arranged on the shell body 11, and the sealing ring mounting groove of the small diameter section is arranged on the stepped hole.

Further, as shown in fig. 2 to 4, the detection assembly 12 includes an electrode 121, a bushing 122, and a fastening nut 123. A first mounting groove 112 and a first liquid circulation hole 111 are arranged in the housing 11, a through hole is arranged at the bottom of the first mounting groove 112, the through hole is arranged on the side wall of the first liquid circulation hole 111, and the through hole is communicated with the first liquid circulation hole 111. The side wall of the stepped hole of the connecting body 2 is provided with the second liquid flow hole 21 matching the first liquid flow hole 111, and liquid can flow in the electromagnetic flowmeter. The electrode 121 is mounted in the first mounting groove 112, and a first end of the electrode 121 penetrates the through hole and is disposed in the first liquid flowing hole 111. The first mounting groove 112 is provided with internal threads, the bushing 122 is mounted at one end of the electrode 121 far away from the first liquid circulation hole 111, the fastening nut 123 is in threaded connection with the first mounting groove 112 and abuts against the bushing 122, and the bushing 122 abuts against the electrode 121, so that the electrode 121 is fixed. The second end of the electrode 121 is provided with a screw 124, the wiring harness of the integrating instrument 3 sequentially penetrates through the middle holes of the double-headed flange 4, the fastening nut 123 and the bushing 122, and the wiring harness is fixed to the second end of the electrode 121 through the screw 124, so that the electrode 121 is electrically connected with the integrating instrument 3, and the electrode 121 can detect the liquid flow in the first liquid circulation hole 111. Preferably, the insulating lining 1111 is provided in the first liquid circulation hole 111, which fulfills the performance requirements of insulation of the first liquid circulation hole 111. The insulating lining 1111 in this embodiment is preferably a teflon lining.

After core assembly 1 is installed in connector 2, first liquid circulation hole 111 and second liquid circulation hole 21 intercommunication setting, preferably, still be provided with locating pin 8 between casing 11 and the connector 2, in this embodiment, the lateral wall of shoulder hole and the lateral wall of casing 11 all are provided with assorted semicircular groove, locating pin 8 is installed in two semicircular grooves, on the one hand, be convenient for the location equipment between the two, make first liquid circulation hole 111 and second liquid circulation hole 21 dock the intercommunication fast, on the other hand, prevent to produce relative rotation between casing 11 and the connector 2, cause liquid flow measurement data inaccurate. In this embodiment, the number of the positioning pins 8 is two, and the positioning pins are symmetrically arranged on two sides of the housing 11.

Furthermore, the electrodes 121, the bushing 122, the fastening nut 123 and the first mounting grooves 112 of the casing 11 are two sets and symmetrically disposed on two sides of the first liquid circulation hole 111, a wire hole is disposed in the sidewall of the casing 11, and the electrode 121 on the side of the first liquid circulation hole 111 far from the integrating instrument 3 is electrically connected to the integrating instrument 3 through the wire hole. Preferably, after the electrode 121, the bushing 122 and the fastening nut 123 are installed, the first liquid flowing hole 111 is far away from the first installation groove 112 on the side of the integrating instrument 3 and is blocked by using the core plug 14, so that the electrode 121, the bushing 122 and the fastening nut 123 are sealed. Preferably, a second sealing ring 6 is arranged between the motor and the side wall of the first mounting groove 112, so that the sealing between the motor and the first mounting groove 112 is realized.

The detecting assembly 12 further includes two magnetic pole members 125, the magnetic pole members 125 are used for generating magnetic lines of force, the outer side wall of the housing 11 is provided with two second mounting grooves, the two second mounting grooves are symmetrically disposed on two sides of the first liquid circulation hole 111, the magnetic pole members 125 are mounted in the second mounting grooves, and the magnetic pole members 125 are electrically connected to the integrating instrument 3 through wiring holes. In this embodiment, the magnetic pole member 125 includes a magnetic pole 1251 and an exciting coil 1252, the magnetic pole 1251 is provided with an annular groove, and the exciting coil 1252 is mounted in the annular groove. Preferably, a third sealing ring 7 is disposed between the magnetic pole 1251 and the sidewall of the second mounting groove, so as to realize sealing between the magnetic pole 1251 and the second mounting groove.

Preferably, the connecting body 2 is welded at both ends with connecting flanges 22. The coupling body 2 can be mounted on a pipeline by means of two coupling flanges 22.

Due to the arrangement of the first sealing ring 5, the second sealing ring 6 and the third sealing ring 7, the electromagnetic flowmeter can be suitable for high-pressure environments, and the universality of the electromagnetic flowmeter is improved.

It should be particularly noted that the present embodiment further provides a step of installing the electromagnetic flowmeter, which is as follows:

the method comprises the following steps: installing the insulating lining 1111 in the first liquid circulation hole 111, and installing the two first sealing rings 5 in the sealing ring installation grooves of the large-diameter section of the shell 11;

step two: the second sealing rings 6 are sleeved outside the two electrodes 121, the bushings 122 and the locking nuts 13 at the two ends are sequentially installed in the first installation groove 112 to fix the two electrodes 121, the two electrodes 121 are electrically connected to the integrating instrument 3 by using screws 124, and the first installation groove 112 of the small-diameter section of the shell 11 is blocked by using the core body plug 14;

step three: two third sealing rings 7 are arranged in the sealing ring mounting grooves on the side wall of the second mounting groove; then, the magnetic pole part 125 is installed in the second installation groove, and the lead wire of the magnetic pole part 125 is penetrated through the wiring hole and electrically connected to the integrating instrument 3, so that the core assembly 1 is assembled;

step four: installing a first sealing ring 5 in a sealing ring installation groove of a small-diameter section of a stepped hole, then inserting a core assembly 1 into the stepped hole of a connecting body 2, installing two positioning pins 8 between a shell 11 and the stepped hole to realize positioning assembly of the shell and the stepped hole, and then installing the core assembly 1 on the connecting body 2 by using a locking nut 13;

step five: the integrating instrument 3 is fixed on the connecting body 2 by using the double-headed flange 4 and matching with bolts, and the integral assembly of the electromagnetic flowmeter is completed;

step six: the electromagnetic flowmeter is fixed on a working medium pipeline through the connecting flanges 22 at the two ends of the connecting body 2 and is fixed through bolts, and then the electromagnetic flowmeter can be put into use.

The embodiment also provides the working principle of the electromagnetic flowmeter, which comprises the following specific steps:

when the conductor cuts magnetic lines of force in a magnetic field, an induced potential is generated in the conductor, and the magnitude of the induced potential is in direct proportion to the effective length of the conductor in the magnetic field and the speed of the conductor moving in the magnetic field in the direction perpendicular to the direction of the magnetic field. Similarly, when the magnetic pole component 125 works, a magnetic field is formed, the conductive fluid flows in the second liquid through hole 21 of the connecting body 2 and the first liquid through hole 111 of the core assembly 1, when the conductive fluid flows in the magnetic field in the vertical direction to cut the magnetic induction stress lines, induced potentials are generated on the electrodes 121 on both sides of the pipeline to form pulse signals, the pulse signals are processed by the sensor to become electric signals, and the electric signals are processed by the integrator 3 to display the instantaneous value and the accumulated value of the flow of the conductive fluid, so that the flow value is obtained.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An electromagnetic flow meter, comprising:

a core assembly (1) comprising a housing (11) and a detection assembly (12), the detection assembly (12) being mounted within the housing (11);

the connector (2), the connector (2) is provided with a stepped hole, a stepped side wall is arranged on the outer side of the shell (11), the shell (11) is inserted into the stepped hole, the stepped surface of the stepped side wall abuts against the stepped surface of the stepped hole, a small-diameter section of the stepped side wall is provided with a locking nut (13), and the locking nut (13) is in threaded connection with the shell (11) and abuts against the end of the stepped hole;

integrating instrument (3) and double-end flange (4), install double-end flange (4) one end integrating instrument (3), the other end are fixed in the shoulder hole is kept away from lock nut (13) one end, detecting component (12) electric connection in integrating instrument (3).

2. The electromagnetic flowmeter of claim 1, characterized in that a first liquid flow hole (111) is provided in the housing (11), the side wall of the stepped hole being provided with a second liquid flow hole (21) matching the first liquid flow hole (111), the detection assembly (12) being able to detect the liquid flow in the first liquid flow hole (111).

3. An electromagnetic flow meter according to claim 2, characterized in that an insulating lining (1111) is arranged in the first liquid flow hole (111).

4. The electromagnetic flowmeter of claim 2, wherein the detection assembly (12) comprises an electrode (121), a bushing (122) and a fastening nut (123), a first mounting groove (112) is arranged in the housing (11), a through hole is arranged at the bottom of the first mounting groove (112), the through hole is communicated with the first liquid flow hole (111), the electrode (121) is mounted in the first mounting groove (112), and a first end of the electrode (121) penetrates through the through hole and is arranged in the first liquid flow hole (111);

the first mounting groove (112) is provided with internal threads, the bushing (122) is mounted at one end, away from the first liquid circulation hole (111), of the electrode (121), and the fastening nut (123) is in threaded connection with the first mounting groove (112) and abuts against the bushing (122).

5. The electromagnetic flowmeter of claim 4, characterized in that the second end of the electrode (121) is provided with a screw (124), the wiring harness of the integrating instrument (3) is sequentially threaded through the double-ended flange (4), the fastening nut (123) and the central hole of the bushing (122), and the wiring harness is fixed to the second end of the electrode (121) by the screw (124).

6. The electromagnetic flowmeter of claim 4, wherein the electrodes (121), the bushings (122) and the fastening nuts (123) are arranged in two groups and symmetrically on two sides of the first liquid flow hole (111), a wire hole is arranged in a side wall of the housing (11), and the electrode (121) on the side of the first liquid flow hole (111) far away from the integrating instrument (3) is electrically connected to the integrating instrument (3) through the wire hole.

7. The electromagnetic flowmeter of claim 6, characterized in that said detecting assembly (12) further comprises two magnetic pole members (125), and two second mounting grooves are provided on the outer side wall of said housing (11), and are symmetrically disposed on both sides of said first liquid flowing hole (111), said magnetic pole members (125) are mounted in said second mounting grooves, and said magnetic pole members (125) are electrically connected to said integrating meter (3) through said wiring holes.

8. Electromagnetic flowmeter according to claim 1, characterized in that a positioning pin (8) is further arranged between said housing (11) and said connecting body (2).

9. The electromagnetic flowmeter of claim 7, wherein a first sealing ring (5) is arranged between the housing (11) and the connection body (2);

a second sealing ring (6) is arranged in the electrode (121) and the first mounting groove (112);

and a third sealing ring (7) is arranged between the magnetic pole part (125) and the side wall of the second mounting groove.

10. An electromagnetic flowmeter according to claim 1, characterized in that the connecting body (2) is provided with a connecting flange (22) at both ends.