CN204007745U - Pitot bar integrated mass flow meter - Google Patents

Abstract

The utility model discloses a kind of Pitot bar integrated mass flow meter, comprise Pitot bar sensor, differential pressure transmitter and flow integrator, described Pitot bar sensor has pressure head, connecting pipe and pipeline base is installed, described connecting pipe is installed base through pipeline, described connecting pipe and pipeline are installed between base and are formed with annulus, also comprise the densitometer of measuring fluid-mixing density, densitometric input end is installed base by stopple coupon and described pipeline and is connected, and its signal output part is connected with the signal input part of described flow integrator; Also comprise the drainage tube that can extend in pipeline, this drainage tube is installed base through described pipeline, on drainage tube, be connected with temperature transmitter and pressure unit, temperature transmitter and the signal output part of pressure unit and the signal input part of described flow integrator are connected.The utility model can Measurement accuracy pipeline in the mass rate of fluid-mixing.

Description

Bitoba integrated mass flow meter

technical field

The utility model relates to a Bitobar mass flowmeter for measuring the mass flow of a fluid in a pipeline, in particular to a Bitobar integrated mass flowmeter for measuring the mass flow of a mixed fluid in a pipeline.

Background technique

At present, the structure of the Bitobar mass flowmeter used to measure the mass flow rate of the fluid in the pipeline mainly includes a Bitobar flow sensor, a differential pressure transmitter and a flow totalizer. The Bitobar flow sensor has a pressure guide tube and a pressure head. , the pressure guide tube includes a total pressure tube and a static pressure tube, the upper part of the pressure head has a total pressure hole and a static pressure hole, the lower section of the pressure head is a cylindrical joint, and the total pressure hole is connected to the full pressure hole through a total pressure channel. The pressure pipe is connected, the static pressure hole is connected with the static pressure pipe through the static pressure channel, the total pressure pipe and the static pressure pipe are connected with the input end of the differential pressure transmitter, and the signal output of the differential pressure transmitter end is connected with the signal input end of the flow totalizer, and the Bitobar mass flowmeter with the above structure is only suitable for measuring the mass flow rate of the fluid in the pipeline when there is only one kind of fluid in the pipeline and the fluid is at normal temperature and pressure. When the structure of the Bitoba mass flowmeter is in use, the Bitoba flow sensor is inserted into the pipeline vertically from the side wall of the pipeline, so that the center point of the total pressure hole and the static pressure hole is on the axis of the pipeline, and the total pressure hole Facing the incoming flow direction of the fluid, the static pressure hole faces the outgoing flow direction of the fluid. When the fluid flows in the pipeline, the total pressure port and the static pressure port on the upper end of the pressure guiding tube respectively output the total pressure of the fluid flowing in the pipe. And static pressure, using the total pressure and static pressure of the fluid flowing in the pipeline, the flow rate of the fluid in the pipeline can be calculated according to the principle of fluid mechanics, and then according to the density of the fluid in the pipeline at normal temperature and pressure, it can be calculated in the flow totalizer Calculate the mass flow rate of the fluid in the pipeline and display it on the calculator. However, when various mixed fluids flow in the pipeline and are in a state of very high temperature and normal pressure, the Bitobar mass flowmeter with the above structure cannot accurately measure the mass flow rate of the mixed fluid in the pipeline.

Utility model content

The technical problem to be solved by the utility model is to provide a Bitoba integrated mass flow meter that can accurately measure the mass flow of various mixed fluids flowing through the pipeline under the condition of very temperature and normal pressure.

In order to solve the above-mentioned technical problems, the utility model Bitobar integrated mass flowmeter includes a Bitobar sensor, a differential pressure transmitter and a flow totalizer, and the Bitobar sensor has a pressure head, a pressure guide tube and Pipe installation socket, the pressure guiding tube passes through the pipeline installation socket, an annular gap is formed between the pressure guiding pipe and the pipeline installation socket, and a density meter for measuring the density of the mixed fluid is also included, and the input end of the density meter passes through The sampling tube is connected with the pipe mounting socket, and its signal output end is connected with the signal input end of the flow totalizer; it also includes a drainage tube that can extend into the pipeline, and the drainage tube is installed through the pipeline. The tube base and the drainage tube are connected with a temperature transmitter and a pressure transmitter, and the signal output terminals of the temperature transmitter and the pressure transmitter are connected with the signal input terminal of the flow totalizer.

The Bitobar integrated mass flowmeter with the above structure needs to be installed with a circular installation hole on the pipe wall first, and the radial size of the installation hole should be slightly larger than the transverse direction of the pressure guide tube and drainage tube of the Bitobar flow sensor. The sum of the dimensions, the Bitoba flow sensor is installed on the pipeline through the pipeline installation socket, so that the pressure guiding tube and the drainage tube extend into the pipeline, because the pressure guiding tube in the utility model and the pipeline installation socket An annular gap is formed between them, and a density meter for measuring the density of the mixed fluid is also included. The input end of the density meter is connected to the pipe installation socket through a sampling tube, and its signal output end is connected to the signal input end of the flow totalizer. , the mixed fluid in the pipeline will enter the sampling tube through the annular gap between the pressure guiding tube and the pipeline installation socket by adopting the above technical characteristics, and then the density meter can measure the density of the mixed fluid in the pipeline at normal temperature and pressure and The measurement result is input to the flow totalizer; and because it also includes a drainage tube that can be inserted into the pipeline, the drainage tube passes through the pipeline installation socket, and the temperature transmitter and pressure transmitter are connected on the drainage tube. The signal output terminals of the temperature transmitter and pressure transmitter are connected to the signal input terminal of the flow totalizer. After adopting the above technical features, the accurate temperature and pressure of the warm fluid in the pipeline can be measured, and the measured The structure is input to the flow totalizer, and finally combined with the flow rate of the mixed fluid in the pipeline and the density of the mixed fluid at normal temperature and pressure, and the actual temperature and pressure in the pipeline as compensation, the mixed fluid in the pipeline can be calculated in the flow totalizer The mass flow rate of the fluid. To sum up, the Bitoba integrated mass flowmeter of the utility model can accurately measure the mass flow rate of the mixed fluid in the pipeline.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Fig. 1 is a partial cross-sectional structural schematic diagram of the utility model when the integrated mass flow meter of Bituoba is installed on the pipeline.

FIG. 2 is a schematic diagram of an enlarged structure at I in FIG. 1 .

FIG. 3 is a schematic diagram of the enlarged structure at II in FIG. 1 .

Detailed ways

Referring to Fig. 1-Fig. 3, the utility model discloses a Bitoba integrated mass flowmeter. Fig. 1 shows a partial cross-sectional structure diagram of the utility model when it is installed on a pipeline. Open a circular hole 20, the radial size of the circular hole 20 is slightly larger than the sum of the lateral dimensions of the pressure guiding tube 5 and the drainage tube 8 of the Bitoba flow sensor, so as to ensure that the mixed fluid in the pipeline enters the pipeline installation smoothly Inside the socket. The structure of the utility model mainly includes a Bitobar sensor 1, a differential pressure transmitter 2 and a flow totalizer 3. The Bitobar sensor 1 has a pressure taking head 4, a pressure guiding tube 5 and a pipe installation socket 6, The pressure guide tube 5 passes through the pipe installation socket 6, and an annular gap 7 is formed between the pressure guide pipe 5 and the pipeline installation socket 6, and also includes a density meter 11 for measuring the density of the mixed fluid, and the input of the density meter 11 end is communicated with the pipe installation socket 6 through the sampling pipe 12, and its signal output end is connected with the signal input end of the flow totalizer 3; it also includes a drainage pipe 8 that can be stretched into the pipeline, and the drainage pipe 8 Pass through the pipeline to install the tube socket 6, the temperature transmitter 9 and the pressure transmitter 10 are connected on the drainage tube 8, the signal output ends of the temperature transmitter 9 and the pressure transmitter 10 are integrated with the flow rate Connected to the signal input terminal of instrument 3.

Claims (1)

1. A bitobar integrated mass flowmeter, comprising a bitobar sensor (1), a differential pressure transmitter (2) and a flow totalizer (3), the bitobar sensor (1) has The pressure head (4), the pressure guide tube (5) and the pipe installation socket (6), the pressure guide tube (5) passes through the pipe installation socket (6), and it is characterized in that: the pressure guide tube (5 ) and the pipe mounting socket (6) to form an annular gap (7), and also includes a density meter (11) for measuring the density of the mixed fluid, the input end of the density meter (11) passes through the sampling pipe (12) and the pipe The installation tube base (6) is connected, and its signal output terminal is connected with the signal input terminal of the flow totalizer (3); it also includes a drainage tube (8) that can extend into the pipeline, and the drainage tube (8) The pipe socket (6) is installed through the pipe, the temperature transmitter (9) and the pressure transmitter (10) are connected to the drainage pipe (8), and the temperature transmitter (9) and the pressure transmitter (10 ) is connected to the signal input end of the flow totalizer (3).