CN209857979U

CN209857979U - Scraper flowmeter

Info

Publication number: CN209857979U
Application number: CN201920929460.0U
Authority: CN
Inventors: 卢强; 年亚东; 张�浩
Original assignee: Hefei Jingjie Instrument Co Ltd
Current assignee: Hefei Jingjie Instrument Co Ltd
Priority date: 2019-06-20
Filing date: 2019-06-20
Publication date: 2019-12-27
Anticipated expiration: 2029-06-20

Abstract

The utility model relates to a scraper flowmeter, include the flowmeter body and be located the inlet and the liquid outlet at flowmeter body both ends, this internal rotor that promotes the scraper blade through the fluid and drive together rotatory that is equipped with of flowmeter, the scraper blade with be equipped with the antifriction plate between the rotor, the scraper blade outer wall is installed and is arranged in interior casing on the flowmeter body inner wall realizes fixed connection through the bolt, the axial protrusion of rotor one end is connected with the measurement body through the cam, gear reduction mechanism on the measurement body is connected with the sealed shaft coupling that is located a sealing mechanism, sealed shaft coupling installs the counter through revolution output shaft and is located the counter below is arranged in precision correction ware on the flowmeter body outer wall. Has the advantages that: the utility model discloses avoided the pure motion between the machinery, guaranteed the change of good switching-over and drive ratio between the component, long service life.

Description

Scraper flowmeter

Technical Field

The utility model relates to a flowmeter technical field, concretely relates to scraper blade flowmeter.

Background

The scraper flowmeter is a high-precision positive displacement flowmeter and is suitable for fluid containing mechanical impurities. The flowmeter mainly comprises a rotatable rotor, a scraper, a fixed cam and a shell. The inner cavity of the shell is circular, the rotor is a hollow thin-wall cylinder which can rotate and has a certain width, four grooves which are mutually 900 are formed in the cylinder wall, the scraping plates can freely slide in the grooves in the radial direction, when the rotor leaves a metering area, the scraping plates are retracted into the grooves, fluid is discharged from an outlet, and meanwhile, the latter scraping plate and another adjacent scraping plate form a measuring chamber. The rotor rotates for one circle to discharge 4 parts of fluid with fixed volume, and the flow rate of the fluid to be measured can be obtained according to the rotation number of the rotor.

The scraper flowmeter of present day needs to realize the change of drive ratio and speed reduction regulation through gear drive mechanism and reduction gears in the course of the work to this accurate monitoring flow size, but gear drive mechanism is because pure mechanical part basically, and long-time use can influence the work of part and influence the measurement accuracy because of the friction, and transmission mechanism is good inadequately when switching over and fixity when operating simultaneously, also can influence flowmeter work.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a scraper blade flowmeter provides a safety and stability, frictional force little and convenient to use's scraper blade flowmeter.

In order to realize the above purpose, the utility model discloses a technical scheme be: a scraper flowmeter comprises a flowmeter body, a liquid inlet and a liquid outlet, wherein the liquid inlet and the liquid outlet are positioned at two ends of the flowmeter body, the scraper flowmeter is characterized in that a rotor which is driven to rotate together by a fluid pushing scraper is arranged in the flowmeter body, an abrasion-resistant plate is arranged between the scraper and the rotor, an inner shell arranged on the inner wall of the flowmeter body is arranged on the outer wall of the scraper and fixedly connected through a bolt, an axial protruding part at one end of the rotor is connected with a metering body through a cam, a gear reduction mechanism on the metering body is connected with a sealing coupler arranged in a shaft outlet sealing mechanism, and the sealing coupler is provided with a counter through a revolution output shaft and a precision corrector which is positioned below the counter and arranged;

the gear reduction mechanism comprises a rotor gear connected with a central shaft on the rotor, the rotor gear rotates along the length direction of the metering body through a top shaft pinion meshed with the rotor gear, and one end of the top shaft pinion is connected with a corrector driving gear connected with the precision corrector through an inert gear.

Furthermore, one end of the scraper is provided with a supporting plate which is arranged on the bottom end of the inner wall of the flowmeter body and is connected with the rotor.

Furthermore, a separation cavity between the rotor and the gear reduction mechanism is arranged at one end, close to the cam, of the metering body.

Furthermore, the top shaft gear and the top shaft pinion are fixedly connected through a sealing sleeve.

Furthermore, flowmeter body top both sides all are connected with and extend to flowmeter body is inside exhaust bolt.

The technical effects of the utility model reside in that: the rotor rotates under the action of differential pressure between the inlet and the outlet of the flowmeter, when two adjacent scrapers enter the metering area, the scrapers extend to the inner wall of the shell and only rotate along with the rotor without sliding to form a measuring chamber with fixed volume, when the scrapers leave the metering area, the scrapers retract into the groove, fluid is discharged from the outlet, meanwhile, the latter scraper and the other adjacent scraper form a measuring chamber, the number of times of the rotation of the rotor indicates the flow and is reflected to a counter through a revolution output shaft, the wear-resisting plate between the rotor and the scrapers can well reduce the friction force, the transmission between the top shaft gear and the top shaft pinion is matched with the inert gear to realize the change of the transmission ratio and change the rotation direction, so that the later-stage metering work is convenient, the service performance of the scraper flowmeter is greatly improved, the sealing effect is good, and the good reversing and transmission ratio change between structural members, the service life is long.

Drawings

FIG. 1 is a schematic structural diagram of a scraper flowmeter of the present invention;

fig. 2 is a schematic structural diagram of the gear reduction mechanism of the present invention.

Reference numerals: 1-a flow meter body; 2-liquid inlet; 3-a liquid outlet; 4-a scraper; 5-a rotor; 6-wear plate; 7-a cam; 8-a metering body; 9-a gear reduction mechanism; 10-an output shaft sealing mechanism; 11-sealing the coupling; 12-revolution output shaft; 13-a counter; 14-precision corrector; 15-rotor gear; 16-top shaft gear; 17-a top shaft pinion; 18-idler gear; 19-a corrector drive gear; 20-a supporting plate; 21-sealing sleeve; 22-exhaust bolt.

Detailed Description

Referring to the attached drawings 1-2, a scraper flowmeter comprises a flowmeter body 1, a liquid inlet 2 and a liquid outlet 3 which are positioned at two ends of the flowmeter body 1, a rotor 5 which is driven by a fluid pushing scraper 4 to rotate together is arranged in the flowmeter body 1, an abrasion-resistant plate 6 is arranged between the scraper 4 and the rotor 5, an inner shell arranged on the inner wall of the flowmeter body 1 is arranged on the outer wall of the scraper 4 and fixedly connected through bolts, the axial protruding part at one end of the rotor 5 is connected with a metering body 8 through a cam 7, a gear reduction mechanism 9 on the metering body 8 is connected with a sealing coupler 11 positioned in an output shaft sealing mechanism 10, the sealing coupling 11 is provided with a counter 13 and a precision corrector 14 which is positioned below the counter 13 and is arranged on the outer wall of the flowmeter body 1 through a revolution output shaft 12;

the gear reduction mechanism 9 includes a rotor gear 15 connected to the central axis of the rotor 5, the rotor gear 15 is rotated together with a top shaft pinion 17 along the longitudinal direction of the measuring body 8 by a top shaft gear 16 engaged with the rotor gear 15, and a corrector drive gear 19 connected to the accuracy corrector 14 is connected to one end of the top shaft pinion 17 by an idler gear 18.

As shown in fig. 1, the outer wall of the scraper 4 is provided with an inner shell arranged on the inner wall of the flowmeter body 1 and fixedly connected with the inner shell through bolts, when the rotor 5 rotates, the inner shell is fixed on the flowmeter body 1 through bolts to increase the stability of the rotor, the gear reduction mechanism 9 on the metering body 8 is connected with a sealing coupling 11 positioned in a shaft sealing mechanism 10, the sealing coupling 11 is arranged to enable the output power of the reduction mechanism to be effectively transmitted to a revolution output shaft 12, so that data is reflected through a counter 13, and when the revolution output shaft 12 deviates from the actual revolution, the deviation can be adjusted through a precision corrector 14, so that a corrector driving gear 19 connected with the precision corrector 14 is matched with a rotor gear 15 to be calibrated to the accurate revolution.

Preferably, one end of the scraper 4 is provided with a supporting plate 20 which is arranged at the bottom end of the inner wall of the flowmeter body 1 and connected with the rotor 5, one end of the metering body 8, which is close to the cam 7, is provided with a separation chamber between the rotor 5 and the gear reduction mechanism 9, and the separation chamber can work independently between the gear reduction mechanism 9 and the output shaft sealing mechanism 10, so that later maintenance and installation work is ensured.

Preferably, the top shaft gear 16 and the top shaft pinion 17 are fixedly connected through a sealing sleeve 21, exhaust bolts 22 extending to the inside of the flowmeter body 1 are connected to two sides of the top end of the flowmeter body 1, after the flowmeter is used for a long time, certain deviation occurs in a sealed cavity due to hydraulic pressure in the flowmeter body 1 and oil pressure of lubricating oil, and accordingly pressure is enabled to be within a reasonable range through the exhaust bolts 22.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a scraper flowmeter, includes flowmeter body (1) and is located inlet (2) and liquid outlet (3) at flowmeter body (1) both ends, a serial communication port, be equipped with in flowmeter body (1) and promote scraper blade (4) through the fluid and drive together rotatory rotor (5), scraper blade (4) with be equipped with antifriction plate (6) between rotor (5), scraper blade (4) outer wall is installed and is arranged in interior casing on flowmeter body (1) inner wall realizes fixed connection through the bolt, the axial protrusion of rotor (5) one end is connected with measurement body (8) through cam (7), gear reduction mechanism (9) on measurement body (8) are connected with sealed shaft coupling (11) that are located a sealing mechanism (10), sealed shaft coupling (11) are installed counter (13) and are located through revolution output shaft (12) counter (13) below is arranged in flowmeter (13) below A precision corrector (14) on the outer wall of the body (1);

the gear reduction mechanism (9) comprises a rotor gear (15) connected with the upper central shaft of the rotor (5), the rotor gear (15) rotates along the length direction of the metering body (8) through a top shaft gear (16) meshed with the rotor gear (15), and one end of the top shaft pinion (17) is connected with a corrector driving gear (19) connected with the precision corrector (14) through an idler gear (18).

2. A scraper flowmeter according to claim 1, characterized in that one end of the scraper (4) is provided with a carrier plate (20) which is arranged on the bottom end of the inner wall of the flowmeter body (1) and is connected to the rotor (5).

3. A scraper flowmeter according to claim 1, wherein a compartment is provided in said body (8) adjacent to said cam (7) between said rotor (5) and said gear reduction mechanism (9).

4. A scraper flowmeter according to claim 1, characterized in that said top shaft gear (16) and said top shaft pinion (17) are fixedly connected by means of a gland (21).

5. A scraper flowmeter according to claim 1, characterized in that exhaust bolts (22) extending to the inside of the flowmeter body (1) are connected to both sides of the top end of the flowmeter body (1).