CN212110152U

CN212110152U - Non-full pipe type electromagnetic flowmeter

Info

Publication number: CN212110152U
Application number: CN202020808731.XU
Authority: CN
Inventors: 张鸿泉; 张振川
Original assignee: Kaifeng Hongda Automation Instrument Co ltd
Current assignee: Kaifeng Hongda Automation Instrument Co ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2020-12-08
Anticipated expiration: 2030-05-15

Abstract

A non-full pipe electromagnetic flowmeter; the utility model discloses a still include to lead to the stopper device including converter, coil shell, flange, survey meter and lining, the utility model discloses still include, lead to the stopper device, the coil shell is installed at survey meter surface, is provided with the coil in the coil shell, and the coil encircles the suit outside the survey meter, and the flange mounting is at the both ends of survey meter, and the lining is installed on the side face inside pipe wall, leads to the stopper device and includes wall scraping system and recoil system; the utility model discloses the structure is ingenious, thinks about the novelty, can carry out the efficient clearance to the impurity of flowmeter pipeline inner wall adhesion through scraping wall system and recoil system, avoids the inside jam that causes because of the accumulation of impurity of flowmeter pipeline to can avoid the jam of pipeline to data measurement's accuracy, the practicality is stronger.

Description

Non-full pipe type electromagnetic flowmeter

Technical Field

The utility model relates to an electromagnetic flowmeter technical field, in particular to non-full tubular electromagnetic flowmeter.

Background

Electromagnetic flow meters have been used to measure full pipe flow since commercialization in the 50's of the 20 th century, and until the early 90's of the 20 th century, the non-full pipe electromagnetic flow meter (EMF) was first developed by Fischer & Porter corporation. The instrument consists of two parts, one is a sensor installed on the pipeline, and the other is a converter 1 controlled by a microprocessor, so that the instrument can indicate locally and can remotely display and control. From the appearance, the non-full pipe electromagnetic flowmeter is not different from a common non-full pipe electromagnetic flowmeter (EMF), has the advantages of no movable part, no flow blocking part, extremely small pressure loss, linear output, wide range and the like, and solves the problem that the flow is difficult to measure when a large number of large-diameter pipelines are not full of fluid. However, during use, limitations are also found, such as the possibility of measuring only flow rates in the pipe 4 at levels above 0.1D, which cannot be detected at levels below this level. In-process that uses at the electromagnetic flowmeter, because exist more or less impurity in being surveyed the electric conductivity liquid, after the electromagnetic flowmeter is in long-time use, impurity is through long-time accumulation in being surveyed the electric conductivity liquid, lead to the inner wall of electromagnetic flowmeter pipeline to adhere to a large amount of impurity, current electromagnetic flowmeter's inside is not provided with the washing unit to electromagnetic flowmeter pipeline inside, will cause the jam to the pipeline easily when the impurity accumulation of electromagnetic flowmeter pipeline inside to a certain amount, and can influence the data measurement of electromagnetic flowmeter.

A non-full pipe electromagnetic flowmeter is needed to address this problem.

SUMMERY OF THE UTILITY MODEL

To the above situation, in order to overcome the defects of the prior art, the present invention aims to provide a non-full pipe electromagnetic flowmeter, which effectively solves the above problems.

The technical scheme of its solution is, the utility model discloses a converter, coil shell, flange, survey buret and lining, the utility model discloses still including leading to the stopper device, the coil shell is installed at surveying buret surface, is provided with the coil in the coil shell, and the coil encircles the suit and outside measuring the pipe, and flange mounting is at the both ends of surveying buret, and the lining is installed on the side face inside pipe wall, leads to the stopper device including scraping wall system and recoil system.

The utility model has the advantages that: the utility model discloses the structure is ingenious, thinks about the novelty, can carry out the efficient clearance to the impurity of flowmeter pipeline inner wall adhesion through scraping wall system and recoil system, avoids the inside jam that causes because of the accumulation of impurity of flowmeter pipeline to can avoid the jam of pipeline to data measurement's accuracy, the practicality is stronger.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view of the retaining ring of the wall scraping system of the present invention.

Fig. 3 is a cross-sectional view of the first chute of the wall scraping system of the present invention.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.

Example (b):

by figure 1 to figure 3, the utility model discloses a converter 1, coil shell 2, flange 3, survey buret 4 and lining 5, the utility model discloses still including leading to the stopper device, coil shell 2 is installed at surveying buret 4 surface, is provided with the coil in the coil shell 2, and the coil encircles the suit and is installed outside surveying buret 4, and flange 3 installs at the both ends of surveying buret 4, and lining 5 is installed on the side face inside pipe wall, leads to the stopper device including scraping wall system and recoil system.

The wall scraping system comprises push rods 6 respectively arranged at the left end and the right end of a measuring pipe 4, a coil shell 2, straight through grooves are formed in the measuring pipe 4 and a lining 5, the push rods 6 are slidably arranged in the straight through grooves, first sliding grooves are formed in the left end and the right end of the lining 5 respectively, each first sliding groove comprises an arc sliding groove 7 arranged at the front end and the rear end of the lining 5, one end, extending into the lining 5, of each push rod 6 is provided with a horizontal rail 8, a first straight rod 9 and a second straight rod 10 in the left-right direction are slidably arranged in each rail 8, the front end of the first straight rod 9 and the rear end of the second straight rod 10 are respectively provided with a first spring 11 and a second spring 12, the front end of the first spring 11 and the rear end of the second spring 12 are respectively connected with a first sliding block slidably arranged in the arc sliding groove 7 at the front end of the lining 5 and a second sliding block arranged in the arc sliding groove 7 at the rear end of the lining 5, and the push rods 6 move downwards to drive the first straight The wall scraping system further comprises a fixing ring 13 arranged on the inner side wall of the lining 5, a first annular guide rail 14 is arranged on the fixing ring 13, a first scraper 15 and a second scraper 16 are installed in the first annular guide rail 14, the first scraper 15 and the second scraper 16 are respectively rotatably installed on the first straight rod 9 and the second straight rod 10, and therefore impurities attached to the inner wall of the lining 5 are scraped when the first scraper 15 and the second scraper 16 move along with the first straight rod 9 and the second straight rod 10.

The backflushing system comprises an inner cavity 17 arranged in the lining 5 and an annular groove 18 arranged on the left side of the inner cavity 17, the inner cavity 17 is communicated with the annular groove 18, a plurality of one-way valves 19 communicated with the inner side of the lining 5 are arranged in the inner cavity 17, when liquid to be measured flowing in on the left side is filled into the inner cavity 17 through the annular groove 18, the liquid in the inner cavity 17 can be flushed out to the inner side of the lining 5 through the one-way valves 19, an annular blocking plate 20 is arranged in the annular groove 18 in a sliding mode, the side of the annular blocking plate 20 is in a circular truncated cone shape, communicating grooves are further formed in the coil shell 2, the measuring tube 4 and the lining 5, a mandril 21 is further inserted in the communicating grooves, the lower hemispherical end of the mandril 21 abuts against the inclined side face of the annular blocking plate 20, a plurality of third springs 22 are further arranged in the annular groove 18, the left end of the third spring 22 is connected to the left side wall of the annular groove 18, the right end of, when the ejector rod 21 moves downwards to eject the annular blocking plate 20, the annular groove 18 is communicated with the inner cavity 17 again.

The fixing ring 13 is further provided with a second annular guide rail 23, a first guide rod 24 and a second guide rod 25 are slidably mounted in the second annular guide rail 23, and the first guide rod 24 and the second guide rod 25 are fixedly connected with the first scraper 15 and the second scraper 16 respectively to determine the positions of the first scraper 15 and the second scraper 16, so that the tool tips of the first scraper 15 and the second scraper 16 always point to the inner side wall of the lining 5.

The utility model discloses still include electrode coil and receiving coil, electrode coil includes: the electrode coil is positioned between the flange 3 and the lining 5, is clamped in the flange 3 and the lining 5, and is respectively provided with a sealing ring at the connecting position with the flange 3 and the lining 5; receiving coil encircles and installs on surveying the outer wall of buret 4, and receiving coil is the same with output coil, for the wire that a plurality of circles were encircleed, and receiving coil's both ends are connected to converter 1, and the receiving coil outside still is equipped with the shield cover of aluminium system for filter the influence that outside electromagnetic field produced to the electrode, improve the measurement accuracy.

The lining 5 is made of polytetrafluoroethylene, ceramic, polychloroprene rubber or PFAF, the lining 5 isolates media in the pipeline from the measuring pipe 4 so as to protect the measuring pipe 4 from being corroded, the lining 5 is positioned between the flanges 3 at two ends, and the flanges 3 fix the position of the lining 5.

The upper ends of the two push rods 6 are provided with a connecting frame 26 for conveniently driving the two push rods 6 to move up and down together.

The end of the ejector rod 21 extending out of the coil housing 2 is provided with a push plate 27 so that when the connecting frame 26 descends. The connecting frame 26 is pressed against the upper end of the push plate 27, and the connecting frame 26 can drive the mandril 21 to move downwards when continuing to descend.

The utility model discloses a theory of operation is: the coil is electrified to generate a magnetic field to form a magnetic induction line, the conductive medium flows through the lining 5 and makes a magnetic induction line cutting motion through the magnetic field, so that the medium carries an electromotive force (voltage) signal, the electromotive force signal is transmitted to the output coil through the input electrode and returns to the medium from the output electrode, a loop is formed in the output coil, a magnetic field is generated, the magnetic field is received by the receiving coil and generates an electric signal in the receiving coil, the electric signal is transmitted to the converter 1 to be amplified similarly to a wireless charging principle, and therefore the flow rate of the fluid can be calculated.

Use the utility model discloses when the clearance, the link 26 is moved to the pushing down, make link 26 drive push rod 6 downstream, first scraper 15 and second scraper 16 move down along the inside wall of lining 5 this moment, clear up the adhesion at the inside wall of lining 5, when first scraper 15 and second scraper 16 accomplish most clearance, link 26 drives the roof downstream, make ring channel 18 and inner chamber 17 intercommunication, make the inside check valve 19 of inner chamber 17 back flush the lateral wall after the scraper clearance under the condition of valve internal pressure, it is effectual to clear up.

The foregoing detailed description/examples are specific embodiments of the present invention, and are intended to be illustrative of the principles of the present invention, which are intended to be illustrative and exemplary, and should not be construed as limiting the scope of the present invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include those which make any obvious replacement or modification of the embodiments described herein, and all of which are within the scope of the present invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. The utility model provides a non-full tubular electromagnetic flowmeter, including converter (1), coil shell (2), flange (3), survey buret (4) and lining (5), a serial communication port, still including leading to the stopper device, install at surveying buret (4) surface coil shell (2), be provided with the coil in coil shell (2), the coil encircles the suit and surveys outside buret (4), the both ends of surveying buret (4) are installed in flange (3), install on the inside pipe wall of side face pipe lining (5), lead to the stopper device including scraping wall system and recoil system.

2. The non-full pipe electromagnetic flowmeter according to claim 1, wherein the wall scraping system comprises push rods (6) respectively mounted at the left and right ends of the measuring pipe (4), through slots are formed in the coil housing (2), the measuring pipe (4) and the lining (5), the push rods (6) are slidably mounted in the through slots, first sliding slots are respectively formed at the left and right ends of the lining (5), each first sliding slot comprises arc-shaped sliding slots (7) formed in the front end and the rear end of the lining (5), a horizontal rail (8) is mounted at one end of each push rod (6) extending into the lining (5), a first straight rod (9) and a second straight rod (10) in the left and right directions are slidably mounted in the rail (8), a first spring (11) and a second spring (12) are respectively arranged at the front end of the first straight rod (9) and the rear end of the second straight rod (10), and the front end of the first spring (11) and the rear end of the second spring (12) are respectively slidably mounted at the front end of the lining (5) (7) The inner first sliding block is connected with the second sliding block arranged in the arc-shaped sliding groove (7) at the rear end of the lining (5) to form a structure that the push rod (6) moves downwards to drive the first straight rod (9) and the second straight rod (10) to be always attached to the inner wall of the lining (5) in the downward movement process, the wall scraping system also comprises a fixing ring (13) arranged on the inner side wall of the lining (5), a first annular guide rail (14) is arranged on the fixing ring (13), a first scraper (15) and a second scraper (16) are arranged in the first annular guide rail (14), the first scraper (15) and the second scraper (16) are respectively and rotatably arranged on the first straight rod (9) and the second straight rod (10), the first scraper (15) and the second scraper (16) scrape off impurities attached to the inner wall of the lining (5) when moving along with the first straight rod (9) and the second straight rod (10).

3. The non-full pipe type electromagnetic flow meter according to claim 1, wherein the back flushing system comprises an inner cavity (17) of the lining (5) and an annular groove (18) arranged at the left side of the inner cavity (17), the inner cavity (17) is communicated with the annular groove (18), a plurality of one-way valves (19) communicated with the inner side of the lining (5) are arranged in the inner cavity (17), an annular blocking plate (20) is slidably arranged in the annular groove (18), the side of the annular blocking plate (20) is in a circular truncated cone shape, communicating grooves are further formed in the coil shell (2), the measuring pipe (4) and the lining (5), a push rod (21) is further inserted in the communicating grooves, the lower end of the push rod (21) in a hemispherical shape abuts against the inclined side face of the annular blocking plate (20), a plurality of third springs (22) are further arranged in the annular groove (18), and the left end of the third spring (22) is connected to the left side wall of the annular, the right end of the third spring (22) is connected with the left end of the annular blocking plate (20).

4. The non-full-pipe electromagnetic flowmeter according to claim 2, wherein the fixed ring (13) is further provided with a second annular guide rail (23), the second annular guide rail (23) is slidably provided with a first guide rod (24) and a second guide rod (25), and the first guide rod (24) and the second guide rod (25) are fixedly connected with the first scraper (15) and the second scraper (16), respectively.

5. The non-full pipe electromagnetic flowmeter of claim 1 wherein said liner (5) is made of teflon, ceramic, neoprene or PFAF.

6. A non-full pipe electromagnetic flowmeter according to claim 2 wherein the upper ends of the two pushrods (6) are fitted with attachment brackets (26).

7. A non-full-pipe electromagnetic flowmeter according to claim 3 wherein the end of the stem (21) extending beyond the coil housing (2) is provided with a push plate (27).