CN218916437U

CN218916437U - Gas ultrasonic flowmeter

Info

Publication number: CN218916437U
Application number: CN202122632924.1U
Authority: CN
Inventors: 杨国芬; 林念杰; 叶友传; 徐亦鹏; 黄兆伟; 董建念
Original assignee: Zhejiang Panbo Technology Co ltd
Current assignee: Zhejiang Panbo Technology Co ltd
Priority date: 2021-10-31
Filing date: 2021-10-31
Publication date: 2023-04-25
Anticipated expiration: 2031-10-31

Abstract

A gas ultrasonic flowmeter belongs to the technical field of gas flowmeters. The shell is connected with the volume corrector through a bracket, and is characterized in that a metering core assembly is arranged in the shell and is pressed by a gland, the metering core assembly is provided with a plurality of transducers and pressure balance holes, an external pressure taking port is further arranged on the shell, the surface of the metering core assembly is sealed through a plug in a pressure bearing manner, a junction box assembly is arranged on the surface of the metering core assembly, a temperature sensor, a pressure sensor and a transducer binding post are arranged in the bracket, and a cable arranged on the transducer binding post are converged and encapsulated in the junction box assembly. The structure is simple, the built-in metering core is easy to replace and clean, the transducer is damaged, the whole machine is not required to be replaced, and the problem that the transducer is damaged due to unequal internal and external pressure due to the arrangement of the pressure balance holes is solved.

Description

Gas ultrasonic flowmeter

Technical Field

The utility model belongs to the technical field of gas flow meters, and particularly relates to a gas ultrasonic flow meter.

Background

The gas ultrasonic flowmeter utilizes the sound velocity difference principle of ultrasonic wave propagation, namely, the flow velocity and flow of gas are calculated by measuring the sound velocity difference of forward and backward propagation of ultrasonic gas flow.

The transducer adopted by the existing gas ultrasonic flowmeter is directly assembled in the shell, is not easy to clean, is often damaged due to unequal pressure inside and outside the transducer, and is replaced by the whole machine once damaged, so that the cost is high.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide a technical scheme of a gas ultrasonic flowmeter.

A gas ultrasonic flowmeter, its casing passes through the support with the volume correction appearance and links to each other, its characterized in that casing inside sets up the measurement core subassembly to compress tightly through the gland, the measurement core subassembly be equipped with a plurality of transducers and pressure balance hole, still be equipped with external pressure-taking mouth on the casing, and through end cap pressure-bearing seal, measurement core subassembly surface is equipped with the terminal box subassembly, is equipped with temperature sensor, pressure sensor and transducer terminal in the support, the cable that sets up on the transducer and the cable that sets up on the transducer terminal are assembled and are made the embedment at the terminal box subassembly.

The gas ultrasonic flowmeter is characterized in that 2-8 pairs of transducers are arranged and fixed through pressing plates and screws.

The gas ultrasonic flowmeter is characterized in that two pressure taking ports are arranged on the shell and symmetrically arranged at the front center and the rear center of the shell.

The gas ultrasonic flowmeter is characterized in that a pressure taking screw is arranged in the pressure taking port, and the pressure taking screw is provided with a pressure taking channel.

The gas ultrasonic flowmeter is characterized in that the metering core assembly is provided with a cross rod for limiting the pressure taking screw.

The structure is simple, the built-in metering core is easy to replace and clean, the transducer is damaged, the whole machine is not required to be replaced, and the problem that the transducer is damaged due to unequal internal and external pressure due to the arrangement of the pressure balance holes is solved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a partial cross-sectional view of the structure of the present utility model;

FIG. 3 is a schematic diagram of a metering core structure;

FIG. 4 is another schematic structural view of a metering core;

FIG. 5 is a schematic view of the internal structure of the bracket;

in the figure: 1. a volume corrector; 2. a bracket; 3. a junction box assembly; 4. a gland; 5. a metering core assembly; 6. a housing; 7. taking a compression screw; 8. a plug; 9. a transducer; 10. a pressing plate; 11. a cross bar; 12. a pressure balance hole; 13. transducer binding post; 14. a temperature sensor; 15. a pressure sensor.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

A shell 6 of the gas ultrasonic flowmeter is connected with a volume corrector 1 through a bracket 2, a metering core assembly 5 is arranged in the shell 6 and is pressed by a pressing cover 4, the metering core assembly 5 is provided with a plurality of transducers 9 and pressure balance holes 12, 2-8 pairs of transducers 9 are generally arranged according to a flow channel, and the transducers 9 are fixed through a pressing plate 10 and screws. The shell 6 is also provided with an external pressure taking port, the external pressure taking port is sealed by a plug 8 in a pressure bearing manner, the external pressure taking ports are generally provided with two pressure taking ports, the external pressure taking ports are symmetrically arranged at the front and rear central positions of the shell 6, pressure taking screws 7 are arranged in the pressure taking ports, the pressure taking screws 7 are provided with pressure taking channels, and a cross rod 11 is arranged on the surface of the metering core assembly 5 and used for limiting the pressure taking screws 7. When the product is assembled and is to be detected, the balance between the flow channel and the external pressure can be adjusted by the pressure taking screw 7 arranged in the pressure taking port. The surface of the metering core component 5 is provided with a junction box component 3, a temperature sensor 14, a pressure sensor 15 and a transducer binding post 13 are arranged in the bracket 2, and the corrector reads the temperature of the digital temperature sensor 14, the pressure value of the pressure sensor 15 and the working condition flow detected by the ultrasonic base meter in a digital communication mode, performs volume conversion according to a gaseous equation and converts the working condition flow into the standard condition flow. The corrector is also provided with an Internet of things module, an RS485 communication interface, a pulse output interface and the like, and outputs various signals. The cables arranged on the transducer 9 and the cables arranged on the transducer binding post 13 are converged and encapsulated in the junction box assembly 3, so that the adaptability of the product medium is improved, and meanwhile, the transducer 9 can be conveniently cleaned, maintained and replaced.

The gas ultrasonic flowmeter is a novel flowmeter for measuring the flow velocity based on an ultrasonic time difference method, adopts a four-channel design, can effectively eliminate the influence of vortex and asymmetric flow, and improves the reliability of a system. The product integrates flow metering and volume correction, and can directly measure the volume flow, temperature, pressure and volume flow and total volume of gas under the measurement condition (short for "working condition") and the reference condition (short for "standard condition"). The system can also be added with the functions of communication of the Internet of things and prepayment settlement of a system platform according to the requirements, and is an ideal instrument for urban fuel gas trade metering and industrial gas measurement in industries such as petrochemical industry, metallurgy, electric power and the like.

The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims

1. The utility model provides a gaseous ultrasonic flowmeter, its casing (6) link to each other through support (2) with volume correction appearance (1), its characterized in that casing (6) inside set up measurement core subassembly (5) to compress tightly through gland (4), measurement core subassembly (5) be equipped with a plurality of transducers (9) and pressure balance hole (12), still be equipped with external pressure-taking mouth on casing (6) to pressure-bearing seal through end cap (8), measurement core subassembly (5) surface is equipped with terminal box subassembly (3), is equipped with temperature sensor (14), pressure sensor (15) and transducer terminal (13) in support (2), the cable that sets up on transducer (9) and the cable that sets up on transducer terminal (13) are assembled and are made the embedment at terminal box subassembly (3).

2. An ultrasonic gas flowmeter according to claim 1, wherein said transducers (9) are arranged in 2-8 pairs and are secured by means of pressure plates (10) and screws.

3. An ultrasonic gas flowmeter according to claim 1, wherein two pressure-taking ports are provided in the housing (6) and symmetrically provided in front and rear center positions of the housing (6).

4. A gas ultrasonic flowmeter according to claim 3, characterized in that a pressure tapping screw (7) is provided in the pressure tapping port, said pressure tapping screw (7) being provided with a pressure tapping channel.

5. A gas ultrasonic flow meter according to claim 3, characterised in that the metering core assembly (5) is provided with a cross bar (11) for limiting the pressure tapping screw (7).