CN216433101U

CN216433101U - Light spiral dual-rotor flowmeter

Info

Publication number: CN216433101U
Application number: CN202123284138.3U
Authority: CN
Inventors: 刘杰; 王国武; 曹玉柱; 唐勇志
Original assignee: Hefei Jingda Instrument Co ltd
Current assignee: Hefei Jingda Instrument Co ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-05-03
Anticipated expiration: 2031-12-24

Abstract

The utility model discloses a light-duty spiral birotor flowmeter, including the casing, it has medium import and medium export to open respectively to incline about the casing, is fixed with protecgulum and hou gai respectively at the front and back end of casing, installs two rotors through the bearing side by side in the casing is inside, and mutual driven synchronizing gear is installed to the rear end of two rotors, is fixed with gear one at the front end of the rotor that is close to the medium outlet side the protecgulum inboard install the magnetism shaft coupling, the rear end of magnetism shaft coupling be fixed with gear one mesh driven gear two, be equipped with in the protecgulum outside and have the counting mechanism with magnetism coupling joint. The utility model has the characteristics of light in weight, measurement accuracy height, flow range width, noise are low, operate steadily and long service life etc, can the wide application in the oil of trades such as on-vehicle, boats and ships, electric power, oil, the technological process of chemical industry liquid (to the noncorrosive medium of aluminium) detects and trade measurement.

Description

Light spiral dual-rotor flowmeter

Technical Field

The utility model relates to a flowmeter technical field especially relates to a light-duty spiral birotor flowmeter.

Background

A sealed cavity formed by a rotor and a cover plate is arranged in a metering chamber of the conventional flowmeter and is used as a metering unit of flow. The rotor is driven to rotate by the pressure difference at the inlet and outlet of the flowmeter, so that the liquid at the inlet is continuously metered by the sealed cavity and then is sent to the outlet. The liquid quantity flowing through each revolution is eight times of that of the sealed cavity in the figure, the total number of the rotation of the rotor and the speed of the rotation are transmitted to the counting mechanism by the sealed coupling, and the total quantity of the liquid passing through the pipeline can be known by pointer display and character wheel accumulation. A pulse transmitter can be arranged in the counting mechanism, namely, the flowmeter with the signal is formed, and the counting mechanism is matched with an electric display instrument, so that remote transmission (functions of quantification, accumulation, instantaneity and the like) automatic measurement and control can be realized. The casing, the front cover and the rear cover of the flowmeter are made of carbon steel or stainless steel, the double rotors are cast iron or stainless steel parts, and aluminum alloy cannot be selected.

The prior flow meter of the military fuelling vehicle was a waist wheel flow meter made of all aluminum alloy. The shell, the front cover and the rear cover are made of aluminum alloy, the pair of waist wheels are made of aluminum alloy, and the waist wheels are not meshed with each other and transmit rotation through the subsequent pair of synchronous gears. However, in the case of the waist wheel flowmeter, the rotation angular velocity is unstable due to the presence of the long and short axis of the waist wheel, the pulsation of the base meter is large, and the transmitted pulse and current signals are not uniform.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a light-duty spiral birotor flowmeter for remedying prior art's defect.

The utility model discloses a realize through following technical scheme:

the utility model provides a light-duty spiral birotor flowmeter, includes the casing, and it has medium import and medium export to open respectively in the side about the casing, is fixed with protecgulum and hou gai respectively at the front and back end of casing, installs two rotors through the bearing side by side in the casing is inside, and mutual driven synchronizing gear is installed to the rear end of two rotors, is fixed with gear one at the front end of the rotor that is close to the medium outlet side the protecgulum inboard install the magnetic coupling, the rear end of magnetic coupling be fixed with gear one mesh driven gear two, be equipped with in the protecgulum outside and be connected with counting mechanism with the magnetic coupling.

The rotor is an unloading type screw rotor.

The bearing is a deep groove ball bearing.

The shell, the front cover, the rear cover and the rotor are all made of aluminum alloy materials.

The counting mechanism is an intelligent electronic counter or a mechanical counter.

The utility model has the advantages that: the utility model prevents the double rotors from causing occlusion and strain when directly meshed by transmitting motion through the synchronous gear, and only by adopting the transmission of the synchronous gear, the material of the double rotors can be selected from the material of the aluminum alloy, so that the whole weight of the flowmeter is reduced; the dual rotors are adopted, the base meter rotates stably without pulsation, and sent pulse and current signals are uniform; the dual rotors are installed by adopting the deep groove ball bearing, so that the starting flow of the flowmeter can be reduced, and the error is reduced.

The utility model has the characteristics of light in weight, measurement accuracy height, flow range width, noise are low, operate steadily and long service life etc, can the wide application in the oil of trades such as on-vehicle, boats and ships, electric power, oil, the technological process of chemical industry liquid (to the noncorrosive medium of aluminium) detects and trade measurement.

Drawings

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

Fig. 2 is a schematic structural diagram of the unloading type screw rotor.

Fig. 3 is a schematic diagram of the engagement process of the helical dual rotors.

Detailed Description

As shown in fig. 1, the light spiral dual-rotor flowmeter comprises a casing 1, wherein a medium inlet 2 and a medium outlet 3 are respectively formed in the left side and the right side of the casing 1, a front cover 4 and a rear cover 5 are respectively fixed at the front end and the rear end of the casing 1, two rotors 7 are arranged in the casing 1 in parallel through a bearing 6, synchronizing gears 8 which are mutually driven are arranged at the rear ends of the two rotors 7, a first gear 9 is fixed at the front end of the rotor close to the side of the medium outlet 3, a magnetic coupling 10 is arranged on the inner side of the front cover 4, a second gear 11 which is meshed with the first gear 9 is fixed at the rear end of the magnetic coupling 10, and a counting mechanism connected with the magnetic coupling 10 is arranged on the outer side of the front cover 4.

As shown in fig. 2 and 3, the rotor 7 is an unloading screw rotor (200710191169. X), and the two unloading screw rotors are not directly meshed but are driven by a synchronous gear in the running process, so that the clamping stagnation phenomenon in the running process is reduced, and the occlusion and strain caused by the direct meshing of the double rotors are avoided.

The bearing 6 is a deep groove ball bearing.

The shell 1, the front cover 4, the rear cover 5 and the rotor 7 are all made of aluminum alloy materials.

By adopting an intelligent electronic counter, a high-performance microprocessor and a low-power consumption double-liquid-discharge display screen, instantaneous flow, single-shift cumulant and accumulated total amount can be displayed on site, a pulse signal and a 4-20mA analog quantity signal can be selectively output, HART communication and RS485 communication are realized, and the requirements of modern measurement and control are fully met.

A mechanical counter can be optionally matched to realize field display; the BGF signal generator is matched with the BGF signal generator for use, and a pulse signal is output to realize remote integration display and control; the device is matched with a BMF (BMF) sender for use, and outputs a 4-20mA analog quantity signal to realize remote instantaneous flow display or flow control.

Claims

1. The utility model provides a light-duty spiral birotor flowmeter which characterized in that: the counting device comprises a shell, wherein a medium inlet and a medium outlet are respectively formed in the left side and the right side of the shell, a front cover and a rear cover are respectively fixed at the front end and the rear end of the shell, two rotors are arranged in the shell in parallel through bearings, synchronous gears which are mutually driven are installed at the rear ends of the two rotors, a first gear is fixed at the front end of the rotor close to the medium outlet side, a magnetic coupler is installed on the inner side of the front cover, a second gear which is meshed with the first gear is fixed at the rear end of the magnetic coupler, and a counting mechanism which is connected with the magnetic coupler is arranged on the outer side of the front cover.

2. The lightweight helical dual rotor flowmeter of claim 1, wherein: the rotor is an unloading type screw rotor.

3. The lightweight helical dual rotor flowmeter of claim 1, wherein: the bearing is a deep groove ball bearing.

4. The lightweight helical dual rotor flowmeter of claim 1, wherein: the shell, the front cover, the rear cover and the rotor are all made of aluminum alloy materials.

5. The lightweight helical dual rotor flowmeter of claim 1, wherein: the counting mechanism is an intelligent electronic counter or a mechanical counter.