CN210741570U

CN210741570U - Bidirectional measurement turbine flowmeter

Info

Publication number: CN210741570U
Application number: CN201921701221.6U
Authority: CN
Inventors: 李琳; 李长江
Original assignee: Shanxi Aigrui Technology Co Ltd
Current assignee: Shanxi Aigrui Technology Co Ltd
Priority date: 2019-10-12
Filing date: 2019-10-12
Publication date: 2020-06-12
Anticipated expiration: 2029-10-12

Abstract

The utility model discloses a two-way measurement turbine flowmeter, including casing, measurement chamber, impeller, magnetoelectric induction converter, enlarged rectifier and display instrument, the impeller includes impeller main part, blade, first pivot and second pivot, and the impeller main part is the cylinder, and the center is equipped with the blind hole that holds the magnet steel, is equipped with sealed apron on the blind hole, and the blade is rectangular form, arranges perpendicularly with the impeller main part, and the blade is the multi-disc, and the symmetric distribution is on the impeller main part; the first rotating shaft is in threaded connection with the impeller main body, the second rotating shaft is in threaded connection with the sealing cover plate, and the impeller is vertically installed with the metering cavity. The utility model can realize bidirectional measurement, and simultaneously, the error of the bidirectional measurement is small because of the symmetrical distribution of the impellers; the link of casing is processed to the screw thread form, can be different according to the specification of the required ring flange of different pipe diameters, selects the ring flange of suitable specification to carry out threaded connection, and product suitability is strong, practices thrift the cost.

Description

Bidirectional measurement turbine flowmeter

Technical Field

The utility model relates to a flow test field, concretely relates to two-way measurement turbine flowmeter.

Background

In the well drilling and cementing construction operation, the turbine flowmeter has low requirements on the construction environment, and is very suitable for field operation. However, in production practice, it is found that the impeller of the existing turbine flowmeter is composed of spiral blades, the spiral blades can only rotate when the medium flows in opposite directions and impacts the blades, and the medium cannot rotate when flowing in opposite directions, so that only one-way measurement can be performed.

Chinese patent CN 105973317A discloses a bidirectional-metering vortex shedding flowmeter, which comprises a measuring meter body, a vortex generating body, a flow sensor A, a flow sensor B and a flow integrating instrument, wherein the vortex generating body is arranged in the middle of the inner cavity of the measuring meter body; the lateral surface is radially opened to the side of going up at surveying the buret table body has two through-holes, and flow sensor A and flow sensor B stretch into through-hole survey buret table body, and flow sensor A and flow sensor B probe stretch out and lie in the vortex respectively and take place the front and back side of body, are fixed with the support cylinder outside surveying the buret table body, the support cylinder cover flow sensor A and flow sensor B, the top at the support cylinder is installed to the flow totalizer, flow sensor A and flow sensor B all be connected with the flow totalizer. At present, a turbine flowmeter capable of bidirectional measurement is not available.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple structure's two-way measurement turbine flowmeter to the defect that prior art exists.

The technical scheme of the utility model is that:

the utility model provides a two-way measurement turbine flowmeter, includes casing, measurement chamber, impeller, magnetoelectric induction converter, enlargies rectifier and display instrument, casing center department is equipped with the through-hole, the measurement chamber is located casing center department, magnetoelectric induction converter comprises coil and magnet steel for convert the rotational speed of impeller into corresponding signal of telecommunication, the coil install on the casing and with the magnet steel centering, magnetoelectric induction converter with enlarge rectifier signal connection, it connects to enlarge the rectifier display instrument,

the impeller comprises an impeller main body, blades, a first rotating shaft and a second rotating shaft, wherein the impeller main body is a cylinder, a blind hole for accommodating the magnetic steel is formed in the center of the impeller main body, a sealing cover plate is arranged on the blind hole, the blades are in a long strip shape and are arranged perpendicular to the impeller main body, and the blades are multiple and symmetrically distributed on the impeller main body;

the first rotating shaft is in threaded connection with one side, away from the sealing cover plate, of the impeller main body, the second rotating shaft is in threaded connection with the sealing cover plate, and the impeller main body is vertically installed in the metering cavity through the first rotating shaft, the second rotating shaft, the bearing and the bearing seat.

Furthermore, two ends of the shell are respectively provided with a flange plate with a through hole.

Further preferably, the connecting end of the shell is provided with threads for adapting to flanges of different specifications.

Furthermore, a circular arch-shaped bearing protective cover is arranged above the bearing seat.

Further, the number of the blades is even.

Further, the edge of the blade is provided with a round transition angle.

Compared with the prior art, the utility model has the advantages of it is following: the utility model has simple structure, the flow direction of the medium is not limited by the impeller any more, the bidirectional measurement can be realized, and simultaneously, the error of the bidirectional measurement is small because of the symmetrical distribution of the impeller; additionally, the utility model discloses the link of casing is processed to the screw thread form, can be different according to the specification of the required ring flange of different pipe diameters, selects the ring flange of suitable specification to carry out threaded connection, that is to say, the main part of flowmeter is unchangeable, and the interface ring flange can be adjusted as required, and product suitability is strong, has practiced thrift the cost.

Drawings

FIG. 1 is a sectional view of the present invention;

FIG. 2 is a schematic view of the impeller structure of the present invention;

in the figure: 1. the device comprises a shell, 2, a metering cavity, 3, an impeller, 4, an amplifying rectifier, 5, a display instrument, 6, a coil, 7, magnetic steel, 31, an impeller main body, 32, blades, 33, a first rotating shaft, 34, a second rotating shaft, 35, a sealing cover plate, 36, a bearing, 37 and a circular arch-shaped bearing protective cover.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

It should be noted that all directional indications (such as up, down, left, right, front, and back … …) in the embodiments of the present invention are limited to relative positions on a given view, not absolute positions.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Example 1

Referring to fig. 1 and 2, a bidirectional measurement turbine flowmeter comprises a shell 1, a metering cavity 2, an impeller 3, a magnetoelectric induction converter, an amplifying rectifier 4 and a display instrument 5, wherein a through hole is formed in the center of the shell 1, flanges with through holes are respectively arranged at two ends of the shell 1 and are used for being connected with a pipeline to be detected, the metering cavity 2 is formed in the center of the shell and consists of a coil 6 and magnetic steel 7 and is used for converting the rotating speed of the impeller 3 into corresponding electric signals, the coil 6 is arranged on the shell 1 and is aligned with the magnetic steel 7, the magnetoelectric induction converter is in signal connection with the amplifying rectifier 4, and the amplifying rectifier 4 is connected with the display instrument 5;

the impeller 3 comprises an impeller main body 31, blades 32, a first rotating shaft 33 and a second rotating shaft 34, wherein the impeller main body 31 and the blades 32 are made of stainless steel materials with high magnetic permeability, the first rotating shaft 33 and the second rotating shaft 34 are made of non-magnetic stainless steel or hard aluminum materials, the impeller main body 31 is a cylinder, a blind hole for accommodating magnetic steel 7 (the N/S pole direction of the magnetic steel is perpendicular to the central axis of the impeller main body) is formed in the center of the impeller main body, a sealing cover plate 35 is arranged on the blind hole, the blades 32 are long-strip-shaped, and can be designed to be streamline or round transition angles are arranged at the edges of the blades in consideration of reducing resistance and are arranged perpendicular to the impeller main body 31, the blades 32 are multiple and are symmetrically distributed on the impeller main body 31, preferably; due to the symmetrical arrangement of the impellers, acting force is consistent for medium flows from opposite directions, and water flows (medium flows) can flow in and out from two directions, so that bidirectional measurement can be realized;

the first rotating shaft 33 is in threaded connection with one side of the impeller main body 31, which is far away from the sealing cover plate, the second rotating shaft 34 is in threaded connection with the sealing cover plate 35, and the impeller main body 31 is vertically installed with the metering cavity 2 through the first rotating shaft 33, the second rotating shaft 34, the bearing 36 and the bearing seat.

The working principle is as follows: when water flow (medium flow) flows through the metering cavity, the blade below the impeller main body has a certain angle with the flow direction, the impact force of the water flow (medium flow) makes the blade have a rotating moment, the blade rotates after overcoming the friction moment and the fluid resistance, the rotating speed is stable after the moment is balanced, the rotating speed is in direct proportion to the flow speed under a certain condition, the rotating blade is in a magnetic field consisting of magnetic steel and a coil due to the magnetic conductivity of the blade, the rotating blade cuts magnetic lines of force, the magnetic flux of the coil is periodically changed, so that electric pulse signals are induced at two ends of the coil, the signals are amplified and shaped by an amplifying rectifier to form continuous rectangular pulse waves with a certain amplitude, and the continuous rectangular pulse waves can be transmitted to a display instrument which performs signal processing and conversion to display the instantaneous flow and the accumulated amount of the fluid. The pulse frequency f is proportional to the instantaneous flow rate Q of the fluid flowing through the turbine meter over a range of flow rates.

Example 2

On the basis of the embodiment, in order to avoid the direct impact effect of the water flow (medium flow) on the bearing, a circular arch-shaped bearing protection cover 37 is arranged above the bearing seat and plays a role in guiding the water flow (medium flow).

Example 3

Different from embodiment 1, the link processing of casing 1 has internal thread or external screw thread for the ring flange of the different specifications of adaptation, can be different according to the required specification of ring flange of different pipe diameters, selects the ring flange of suitable specification to carry out threaded connection, that is to say, the main part of flowmeter is unchangeable, and the interface ring flange can be adjusted as required, and product suitability is strong. The general bore of turbine flowmeter is not big, just can hardly buy more than DN200, even can buy the price also not low, the utility model discloses the cost is practiced thrift.

The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge range of those skilled in the art without departing from the spirit of the present invention, and the changed contents still belong to the protection scope of the present invention.

Claims

1. The utility model provides a two-way measurement turbine flowmeter, includes casing, measurement chamber, impeller, magnetoelectric induction converter, enlargies rectifier and display instrument, casing center department is equipped with the through-hole, the measurement chamber is located casing center department, magnetoelectric induction converter comprises coil and magnet steel for convert the rotational speed of impeller to corresponding signal of telecommunication, the coil is installed on the casing and with the magnet steel centering, magnetoelectric induction converter with enlarge rectifier signal connection, it connects to enlarge the rectifier display instrument, its characterized in that:

2. The bidirectional measurement turbine flowmeter of claim 1, wherein: and two ends of the shell are respectively provided with a flange plate with a through hole.

3. The bidirectional measurement turbine flowmeter of claim 1, wherein: the connecting end of the shell is provided with threads for adapting to flange plates of different specifications.

4. The bidirectional measurement turbine flowmeter of claim 2, wherein: and a circular arch-shaped bearing protective cover is arranged above the bearing seat.

5. The bidirectional measurement turbine flowmeter of claim 3, wherein: and a circular arch-shaped bearing protective cover is arranged above the bearing seat.

6. The bidirectional measurement turbine flowmeter of claim 2, wherein: the number of the blades is even.

7. The bidirectional measurement turbine flowmeter of claim 3, wherein: the number of the blades is even.

8. The bidirectional measurement turbine flowmeter of claim 1, wherein: the edges of the blades are provided with round transition angles.