CN209764327U - An integrated dual-differential pressure-taking device for gas-liquid two-phase flow measurement with a circular orifice plate - Google Patents

Abstract

The utility model discloses an integrated double differential pressure measuring device for measuring the gas-liquid two-phase flow rate of a circular orifice plate, which comprises an integrated double differential pressure transmitter and a circular orifice plate. The circular orifice plate is located at the measuring Inside the pipeline, and the round orifice plate is fixedly connected with the inner wall of the measuring pipeline. The measuring pipeline is provided with a first pressure taking place, a second pressure taking place and a third pressure taking place. The first pressure taking place, the second pressure taking place Both the pressure-taking place and the third pressure-taking place are provided with pressure-taking annular chambers, and the first pressure-taking place is located in the upstream pipeline of the circular orifice plate. The utility model can use the round orifice plate to throttle the gas and liquid by setting the round orifice plate, and take pressure respectively through the first pressure taking place, the second pressure taking place and the third pressure taking place, so as to realize two For the measurement of different differential pressure values, through these two different differential pressure values and using related algorithms, the relevant flow parameters of the gas phase and liquid phase in the gas-liquid two-phase flow can be calculated, and the measurement accuracy is high.

Description

An integrated dual-differential pressure-taking device for gas-liquid two-phase flow measurement with a circular orifice plate

technical field

The utility model relates to the technical field related to measurement, in particular to an integrated double-differential pressure-taking pressure measuring device for gas-liquid two-phase flow of a circular orifice plate.

Background technique

As a kind of multiphase flow, gas-liquid two-phase flow widely exists in natural gas, petroleum, chemical industry, nuclear energy, aerospace and other fields. Unlike single-phase flow, gas-liquid two-phase flow contains both gas and liquid. When measuring liquid two-phase flow, a special measuring device is required.

However, the existing gas-liquid two-phase flow measurement devices have the following disadvantages: due to the differences in physical properties such as density and viscosity between the phases; Under the influence, it is very difficult to detect the gas-liquid two-phase flow parameters, which easily affects the measurement results and needs to be improved.

Utility model content

The purpose of this utility model is to provide an integrated dual-differential pressure taking pressure measuring device for the gas-liquid two-phase flow rate of the circular orifice plate to solve the problem of physical properties such as density and viscosity between the phases mentioned in the above background technology. At the same time, under the influence of many working conditions such as gravity, temperature, pressure, and phase separation flow, it is very difficult to detect the gas-liquid two-phase flow parameters, which easily affects the measurement results.

In order to achieve the above purpose, the utility model provides the following technical solutions: an integrated dual-differential pressure measuring device for gas-liquid two-phase flow measurement with a circular orifice plate, including an integrated dual differential pressure transmitter and a circular orifice plate, The circular orifice plate is located inside the measuring pipeline, and the circular orifice plate is fixedly connected to the inner wall of the measuring pipeline. The measuring pipeline is provided with a first pressure taking place, a second pressure taking place and a third pressure taking place. The first pressure-taking place, the second pressure-taking place and the third pressure-taking place are all equipped with pressure-taking ring chambers, the first pressure-taking place is located in the upstream pipeline of the circular orifice plate, the second pressure-taking place and the third pressure-taking place The three pressure-taking places are sequentially arranged in the pipeline downstream of the round orifice plate, and the integrated dual differential pressure transmitter is provided with six valve groups, and one side of the integrated dual differential pressure transmitter is connected with a pressure introduction pipe.

Preferably, the throttling part of the circular orifice faces below the horizontal pipeline, the distance from the first pressure taking place to the upstream end face of the circular orifice plate is 0.5 to 1 times the inner diameter of the pipeline, and the distance from the second pressure taking place to the downstream end face of the circular orifice plate 0.5 to 2 times the inner diameter of the pipe, and the distance from the third pressure point to the downstream end face of the circular orifice plate is 5 to 9 times the inner diameter of the pipe.

Preferably, an integrated dual differential pressure transmitter is provided.

The utility model provides an integrated dual-differential pressure-taking device for measuring the gas-liquid two-phase flow of a round orifice plate, which has the following beneficial effects:

The utility model can use the semi-circular holes on the circular orifice plate to throttle the flow of gas and liquid by setting the circular orifice plate. The pressure-taking place and the third pressure-taking place can take pressure respectively through the first pressure-taking place, the second pressure-taking place and the third pressure-taking place to realize the measurement of two different differential pressure values. Through these two different The differential pressure value, using the relevant algorithm, can calculate the relevant flow parameters of the gas phase and liquid phase in the gas-liquid two-phase flow, which is easy to operate and easy to use.

Different from a traditional differential pressure transmitter that can only measure one differential pressure value, an integrated dual differential pressure transmitter can realize the measurement of two differential pressure values.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is the structural representation of the left view of the utility model;

Fig. 3 is a structural schematic diagram of a cross-sectional view of a round orifice plate of the present invention;

Fig. 4 is a schematic structural diagram of the front view of the round orifice plate of the present invention.

In the figure: 1. Integrated double differential pressure transmitter; 2. Six-valve group; 3. Pressure-taking ring chamber; 4. Pressure pipe; 5. Drainage pipe; 6. Drainage valve; , Take the pressure port.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

As shown in Figures 1-4, the utility model provides a technical solution: an integrated double differential pressure pressure measuring device for gas-liquid two-phase flow measurement device with a circular orifice, including an integrated double differential pressure transmitter 1 and A circular orifice 7, the circular orifice 7 is located inside the measuring pipeline, and the circular orifice 7 is fixedly connected to the inner wall of the measuring pipeline, the measuring pipeline is provided with a first pressure taking place, a second pressure taking place and The third pressure taking place, the first pressure taking place, the second pressure taking place and the third pressure taking place are all equipped with a pressure taking ring chamber 3, and the first pressure taking place is located in the upstream pipeline of the circular orifice plate 7 , the second pressure-taking place and the third pressure-taking place are sequentially arranged in the pipeline downstream of the circular orifice plate 7, the integrated double differential pressure transmitter 1 is provided with six valve groups 2, and the integrated double differential A pressure introduction pipe 4 is connected to one side of the pressure transmitter 1 .

The first pressure taking place, the second pressure taking place and the third pressure taking place are provided with four internal pressure taking ports 8 on the pipe wall on the same plane perpendicular to the axis. The pressure effect is good; a pressure introduction port is opened above the vertical axis of the pressure taking ring chamber 3, and the pressure introduction pipe 4 is fixedly connected with the pressure introduction port, and the pressure in the pressure taking ring chamber 3 can be drawn out through the pressure introduction pipe 4 and sent to the inside of the integrated double differential pressure transmitter 1; a sewage outlet is provided below the vertical axis of the pressure taking ring chamber 3, and a sewage discharge pipe 5 is connected to the sewage discharge outlet, and a sewage discharge pipe 5 is installed on the sewage discharge pipe 5. Valve 6 can perform sewage discharge work by opening the sewage valve 6 and using the sewage pipe 5; the throttle part of the circular orifice plate 7 faces below the horizontal pipeline, and the distance from the first pressure-taking place to the upstream end surface of the circular orifice plate 7 is 0.5 of the inner diameter of the pipeline. ~1 times, the distance from the second pressure-taking point to the downstream end face of the circular orifice plate 7 is 0.5-2 times the inner diameter of the pipeline, and the distance from the third pressure-taking point to the downstream end face of the circular orifice plate 7 is 5-9 times the internal diameter of the pipeline. The pressure is taken at the same time at the pressure taking place of the group, the pressure taking effect is good, and it is easy to use.

It should be noted that, an integrated double differential pressure measuring device for measuring gas-liquid two-phase flow with a round orifice plate, when working, the gas and liquid flow in the measuring pipeline, and when passing through the round orifice plate 7, the round and slotted orifice plate 7 can be used to The short orifice plate 7 throttles the gas and liquid, and at the same time, the upstream pipeline and the downstream pipeline where the round orifice plate 7 is located are respectively provided with a first pressure taking place, a second pressure taking place and a third pressure taking place. The pressure point, the second pressure point and the third pressure point are respectively used for pressure measurement, the pressure measurement accuracy is high, and the pressure measurement effect is good, then the six-valve group 2 is opened, and the pressure is sent to the integrated double differential through the pressure introduction pipe 4. In the pressure transmitter 1, the measurement of different differential pressure values is realized. Through different differential pressure values, the related algorithm can be used to calculate the relevant flow parameters of the gas phase and liquid phase in the gas-liquid two-phase flow. The measurement operation is simple and easy to use. .

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims (3)

1. An integrated double differential pressure measuring device for measuring gas-liquid two-phase flow with a circular orifice plate, characterized in that it includes an integrated dual differential pressure transmitter (1) and a circular orifice plate (7). The circular orifice plate (7) is located inside the measuring pipeline, and the circular orifice plate (7) is fixedly connected to the inner wall of the measuring pipeline. pressure, the first pressure taking place, the second pressure taking place and the third pressure taking place are all equipped with a pressure taking ring chamber (3), and the first pressure taking place is located in the upstream pipeline of the circular orifice plate (7) Inside, the second pressure taking place and the third pressure taking place are sequentially arranged in the pipeline downstream of the circular orifice plate (7), and the integrated double differential pressure transmitter (1) is provided with six valve groups (2 ), and one side of the integrated dual differential pressure transmitter (1) is connected with a pressure induction tube (4). 2. An integrated double differential pressure measuring device for gas-liquid two-phase flow with a circular orifice plate according to claim 1, characterized in that: the throttling part of the circular orifice plate (7) faces the horizontal pipeline Below, the first pressure-taking point is 0.5-1 times the inner diameter of the pipe from the upstream end face of the round orifice plate (7), and the second pressure-taking point is 0.5-2 times the inner diameter of the pipe from the downstream end face of the round orifice plate (7). The distance from the third pressure-taking place to the downstream end face of the circular orifice plate (7) is 5 to 9 times the inner diameter of the pipeline. 3. An integrated dual-differential pressure measuring device for gas-liquid two-phase flow with a circular orifice plate according to claim 1, characterized in that: the integrated dual-differential pressure transmitter (1) is used to measure two differential pressure.