CN218955823U

CN218955823U - Impeller for turbine flowmeter

Info

Publication number: CN218955823U
Application number: CN202223551763.4U
Authority: CN
Inventors: 李祥
Original assignee: Cangzhou East China Automatic Control Instrument Co ltd
Current assignee: Cangzhou East China Automatic Control Instrument Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-05-02
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses an impeller for a turbine flowmeter, which relates to the technical field of liquid turbine flowmeters and comprises a front guide frame, a rear guide frame and an impeller, wherein the front guide frame is positioned in front of the impeller, the impeller is positioned in front of the rear guide frame, the front guide frame, the rear guide frame and the impeller are all arranged on a transmission shaft, the impeller comprises a hub, blades and a wheel cover, the hub is connected with the transmission shaft, the blades are connected with the hub, and the outer sides of the blades are connected with the wheel cover. The impeller for the turbine flowmeter, which is disclosed by the utility model, has the advantages that the turbine flowmeter can maintain the calibration characteristic for a long time, the damage of the impeller is reduced, the replacement is reduced, the stability of the impeller is improved, and the working efficiency is improved.

Description

Impeller for turbine flowmeter

Technical Field

The utility model relates to the technical field of liquid turbine flowmeters, in particular to an impeller for a turbine flowmeter.

Background

The turbine flowmeter is a speed type flow metering device with temperature and pressure compensation functions, belongs to one of speed type flowmeters, and has the following working principle: the power of the flowing fluid drives the turbine blades to rotate at a rotational speed approximately proportional to the volumetric flow rate, and the volumetric indication of the fluid through the meter is based on the number of turbine wheel revolutions. The turbine flowmeter has the characteristics of high measurement precision, good repeatability and stability, wide range, rapid flow change reaction, strong anti-interference capability, convenient signal transmission and the like, and is widely applied to the fields of petroleum, chemical industry, electric power, gas pipe networks, urban gas and the like.

The Chinese patent of the utility model with the publication number of CN214621308U discloses a turbine flowmeter convenient for replacing impellers, which comprises a turbine flowmeter body, wherein a flowmeter display screen is arranged on the upper side of the turbine flowmeter body, an impeller replacing mechanism is arranged on the lower side of the turbine flowmeter body, the impeller replacing mechanism is separated from the turbine flowmeter body by rotating a first screw rod, after the impeller replacing mechanism is taken down, a second screw rod can be separated from a thread groove and a fixing hole in a limit groove on a replacement groove by rotating the second screw rod, and a fixing rod can be separated from the limit groove. The impeller of the turbine flowmeter in the prior art has poor shock resistance, is easy to age and deform, is complex to replace, consumes time, is difficult to maintain the calibration characteristic in the use process, has influence on the flow characteristic, and is relatively improved aiming at the problems.

Disclosure of Invention

The utility model aims to provide an impeller for a turbine flowmeter, which can maintain the calibration characteristic for a long time, reduce the damage of the impeller, reduce replacement, improve the stability of the impeller and improve the working efficiency.

In order to achieve the above purpose, the utility model provides an impeller for a turbine flowmeter, which comprises a front guide frame, a rear guide frame and an impeller, wherein the front guide frame is positioned in front of the impeller, the impeller is positioned in front of the rear guide frame, the front guide frame, the rear guide frame and the impeller are all arranged on a transmission shaft, the impeller comprises a hub, blades and a wheel cover, the hub is connected with the transmission shaft, the blades are connected with the hub, and the outer sides of the blades are connected with the wheel cover.

Preferably, the diameters of the front guide frame and the rear guide frame are larger than the diameter of the impeller central transmission shaft.

Preferably, a through hole for the transmission shaft to pass through is formed in the center of the hub, a sealing sleeve is arranged at the through hole, fixing pieces are arranged on the hub, and the fixing pieces are symmetrically arranged.

Preferably, the blades are in a spiral structure, the blades are symmetrically distributed by taking the hub as a circle center, one end of each blade is connected with the hub, and the other end of each blade is connected with the wheel cover.

Preferably, the width of the shroud is the same as the width of the hub.

Preferably, the hub, the blades and the wheel cover are distributed in concentric circles.

Therefore, the impeller for the turbine flowmeter, which adopts the structure, solves the problem that the turbine flowmeter cannot maintain the calibration characteristic in the use process for a long time, strengthens the impeller arrangement, prolongs the service life of the impeller, and ensures the accuracy of the instrument.

The technical scheme of the utility model is further described in detail through the drawings and the embodiments.

Drawings

FIG. 1 is a schematic view of an embodiment of an impeller for a turbine flowmeter according to the present utility model;

FIG. 2 is a schematic view of an impeller structure of an embodiment of an impeller for a turbine flowmeter according to the present utility model;

drawings

1. A front guide frame; 2. a rear guide frame; 3. an impeller; 4. a hub; 5. a blade; 6. wheel cover; 7. and a fixing piece.

Detailed Description

The technical scheme of the utility model is further described below through the attached drawings and the embodiments.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

Examples

The utility model provides an impeller for a turbine flowmeter, which comprises a front guide frame 1, a rear guide frame 2 and an impeller 3, wherein the front guide frame 1 is positioned in front of the impeller 3, the impeller 3 is positioned in front of the rear guide frame 2, the front guide frame 1, the rear guide frame 2 and the impeller are arranged on a transmission shaft, the diameter of the front guide frame 1 gradually increases along the flowing direction of liquid, the diameter of the rear guide frame 3 gradually decreases along the advancing direction of liquid, the outermost diameter of the front guide frame 1 is larger than the diameter of a hub 4, the innermost diameter of the rear guide frame 2 is larger than the diameter of the hub 4, and the front guide frame 1 is provided with two functions, namely, the function of guiding the liquid flowing into the flowmeter is realized, the function of the front guide frame reduces the acting force born by the impeller, the damage to the impeller is reduced, and the rear guide frame 2 is arranged to guide the liquid so as to prevent backflow.

The impeller 3 includes wheel hub 4, blade 5 and wheel casing 6, be concentric circles and distribute between wheel hub 4, blade 5 and the wheel casing 6, the center department of wheel hub 4 is equipped with the through-hole, impeller 3 is connected with the transmission shaft through the through-hole, be equipped with the seal cover between transmission shaft and the through-hole, the setting of seal cover prevents the production of flowmeter error, prevent to pass through rivers in the through-hole in the use, be provided with four stationary blades 7 on the wheel hub 4, stationary blade 7 uses the through-hole as centre of a circle symmetric distribution, stationary blade 7's setting is for strengthening wheel hub 4's steadiness, improve impeller 3 holistic stability.

The blade 5 sets up to spiral structure, and blade 5 uses wheel hub 4 as centre of a circle symmetric distribution, passes through welded connection between blade 5 and the wheel hub 4, and spiral structure's blade overall accuracy is higher, and outer edge hardness is big, and the resistance is little, is favorable to guaranteeing the accuracy of flowmeter to less resistance effectively avoids the impeller to damage, and blade 5 adopts one shot forming technology, need not the welding in the preparation engineering, and the simple installation.

The outside of the blade 5 is connected with the wheel cover 6, the blade 5 is connected with the wheel cover 6 through welding, the width of the wheel cover 6 is the same as the width of the hub 4, the effect of increasing the wheel cover 6 on the outside of the blade 5 is to strengthen the service life of the blade 5, and the resistance of the blade 5 is enhanced.

After the flowmeter is put into use, liquid enters the impeller 3 through the guiding action of the front guide frame 1, the flowmeter starts to work, the diameter of the front guide frame 1 is larger than that of the hub 4, when the liquid passes through the impeller 3, acting force generated by the impeller 3 is smaller, the bearing capacity of the blades is enhanced by the hub 4 and the wheel cover 6, the liquid flows through the flowmeter shell, the blades 5 of the impeller 3 and the flowing direction of the fluid form a certain angle, the blades 5 generate rotating moment due to the impulsive force of the fluid, the blades 5 rotate after overcoming friction moment and fluid resistance, the rotating speed is stable after the moment is balanced, the rotating speed is in direct proportion to the flowing speed under a certain condition, so that corresponding flow is measured, the liquid flows through the impeller 3 and then reaches the rear guide frame 2 to be discharged through the rear guide frame 2.

Therefore, the impeller for the turbine flowmeter adopting the structure improves the structure of the impeller, increases the shroud, prolongs the service life of the impeller, and simultaneously ensures that the flowmeter can maintain the calibration characteristic for a long time.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting it, and although the present utility model has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the utility model can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the utility model.

Claims

1. An impeller for a turbine flowmeter, characterized by: including preceding leading truck, back leading truck, impeller, preceding leading truck is located the impeller the place ahead, the impeller is located the back leading truck the preceding leading truck the back leading truck with the impeller all sets up on the transmission shaft, the impeller includes wheel hub, blade and wheel casing, wheel hub with the transmission shaft is connected, the blade with wheel hub connects, the blade outside with the wheel casing is connected.

2. An impeller for a turbine flowmeter according to claim 1, wherein: the diameters of the front guide frame and the rear guide frame are larger than the diameter of the hub.

3. An impeller for a turbine flowmeter according to claim 2, wherein: the hub is characterized in that a through hole for the transmission shaft to pass through is formed in the center of the hub, a sealing sleeve is arranged at the through hole, fixing pieces are arranged on the hub, and the fixing pieces are symmetrically arranged.

4. A turbine flow meter impeller according to claim 3, wherein: the blade sets up to spiral structure, the blade with wheel hub is the centre of a circle symmetric distribution, the one end of blade with wheel hub is connected, the other end of blade with the wheel cap is connected.

5. An impeller for a turbine flowmeter according to claim 4, wherein: the width of the wheel cover is the same as the width of the wheel hub.

6. An impeller for a turbine flowmeter according to claim 5, wherein: the hub, the blades and the wheel cover are distributed in concentric circles.