CN104568027A - Pitotbar gas flow measuring device - Google Patents

Abstract

The invention discloses a Pitotbar gas flow measuring device. The device comprises a measuring pipe and Pitotbar flow meters, the internal pipeline space of the measuring pipe is uniformly divided into a plurality of spaced measuring channels, each measuring channel is provided with the Pitotbar flow meter; the section of the measuring pipe can be rectangle or circular. When the Pitotbar gas flow measuring device disclosed by the invention is used, two ends of the measuring pipe can be welded on a measured pipe, the size of the measuring pipe is required to be consistent with the size of the measured pipeline, since the internal pipeline space of the measuring pipe is uniformly divided into the plurality of spaced measuring channels, the Pitotbar flow meter is arranged in each measuring channel, the gas flow field flowing through each measuring channel is relatively stable, the gas flow flowing through all measuring channels can be accumulated so that the gas flow flowing through the whole pipeline can be relatively and accurately measured.

Description

A Bitobar gas flow measuring device

technical field

The invention relates to a Bitobar gas flow measuring device for measuring the gas flow in a pipeline.

Background technique

The primary air volume of the power plant is regulated by hot and cold air, and enters the coal mill. In order to save space and reduce energy consumption, the diameter of the pipe is usually large, mostly more than 4m, and it is a round pipe or square pipe. Due to the short laying distance of the pipe, the corresponding The straight pipe section of the pipeline is also very short, which causes the gas flow field inside the straight pipe section to be unstable, and ultimately leads to a large error in measuring the gas flow in the pipeline.

Contents of the invention

The technical problem to be solved by the present invention is to provide a Bitobar gas flow measuring device that can accurately measure the gas flow in the pipeline even when the measured pipeline has a large diameter, a short straight pipe section and the gas flow field in the pipeline is unstable.

In order to solve the above-mentioned technical problems, a kind of Bitobar gas flow measuring device of the present invention comprises measuring tube and Bitobar flowmeter, the internal pipeline space of described measuring tube is divided into a plurality of mutually spaced measuring passages, each measuring The channel is equipped with the described Bitobar flowmeter.

The cross-section of the measuring tube can be rectangular, and the longitudinal middle position of the front and rear tube walls in the rectangular measuring tube is connected with a transverse partition along the length direction of the rectangular measuring tube, and the front and rear tube walls in the rectangular measuring tube are evenly distributed A plurality of longitudinal partitions are connected, and a plurality of longitudinal partitions are respectively arranged between the top wall and the bottom wall of the said transverse partition and the rectangular measuring tube and arranged along the length direction of the rectangular measuring tube, said transverse partition, The plurality of measuring passages are formed between a plurality of longitudinal partitions and the front and rear pipe walls, the top wall and the bottom wall of the rectangular measuring pipe.

The cross-section of the measuring tube can also be circular, and a mounting shaft is arranged along the axis of the circular measuring tube, and a plurality of radial partitions are evenly distributed between the mounting shaft and the inner wall of the pipeline, and adjacent radial partitions The plurality of measuring passages are formed between the pipe inner wall of the circular measuring pipe and the circular measuring pipe.

Adopt the Bitoba gas flow measuring device of above-mentioned structure, when using, the two ends of the measuring tube in the present invention can be installed on the pipeline to be measured by welding, and the size of the measuring tube in the present invention needs to be consistent with the size of the pipeline to be measured Consistently, since the internal pipeline space of the measuring tube is divided into a plurality of mutually spaced measuring channels, and each measuring channel is equipped with the Bitobar flowmeter, the gas flow field flowing through each measuring channel is relatively stable Yes, the gas flow through all the measuring channels can be added together to measure the gas flow through the entire pipeline relatively accurately. Since the pipe to be measured is usually a square pipe or a circular pipe, the present invention specifically provides two specific structures of the measuring device in which the section of the measuring pipe is circular and rectangular.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Fig. 1 is a schematic front view of a Bitobar gas flow measuring device proposed according to the technical solution of the present invention.

FIG. 2 is a schematic side view of FIG. 1 .

FIG. 3 is a schematic top view of FIG. 1 .

Fig. 4 is a schematic front view of another Bitobar gas flow measuring device proposed according to the technical solution of the present invention.

FIG. 5 is a schematic side view of FIG. 4 .

Detailed ways

Referring to Fig. 1-Fig. 5, referring to Fig. 1-Fig. 3 first, a Bitobar gas flow measurement device of the present invention comprises a measuring tube 1 and a Bitobar flowmeter 2, and the internal pipeline space of the measuring tube 1 is uniformly It is divided into a plurality of measuring channels 3 spaced apart from each other, and each measuring channel 3 is equipped with the Bitobar flowmeter 2 described above. Bitobar flowmeters are usually composed of a Bitobar sensor, a differential pressure transmitter and a flow totalizer. The Bitobar sensor has a pressure guide tube and a pressure head. The sensor is installed on the pipeline to be measured, and the pressure guide tube extends into the pipeline to be measured, and the pressure head is used to transmit the total pressure and static pressure signals of the fluid in the pipeline, and finally the flow of the fluid flowing through the pipeline is calculated by the flow totalizer. The cross-section of the measuring tube 1 can be rectangular, and the front and rear tube walls 4 and 5 in the rectangular measuring tube are connected with a transverse partition 6 along the longitudinal direction of the rectangular measuring tube, and the front and rear tubes in the rectangular measuring tube Between the walls 4 and 5, a plurality of longitudinal partitions 7 are evenly distributed, and the plurality of longitudinal partitions 7 are respectively arranged between the transverse partition 6 and the top wall 8 and the bottom wall 9 of the rectangular measuring tube and along the rectangular measuring tube. The length direction of the measuring tube 6 is arranged, and the plurality of horizontal partitions 6, the plurality of longitudinal partitions 7 and the front and rear tube walls 4, 5, top wall 8 and bottom wall 9 of the rectangular measuring tube are formed between Measure channel 3.

Referring to Fig. 4 and Fig. 5 again, the section of the measuring tube 1 described in the present invention can also be circular, and the axis of the circular measuring tube 1 is provided with an installation shaft 10, and the installation shaft 10 and the inner wall 11 of the pipeline are evenly spaced. A plurality of radial partitions 12 are connected, and the plurality of measuring passages 3 are formed between adjacent radial partitions 12 and the inner wall 11 of the circular measuring tube 1 .

Claims (3)

1. a Pitot bar gas flow surveying instrument, it is characterized in that: comprise measuring tube (1) and bi toba flow meter (2), the internal pipeline space of described measuring tube (1) is divided into multiple spaced Measurement channel (3), and each Measurement channel (3) is equipped with described bi toba flow meter (2).

2. Pitot bar gas flow surveying instrument as claimed in claim 1, it is characterized in that: described measuring tube (1) cross section is rectangle, before in rectangle measuring tube, rear tube wall (4, 5) lateral partitions (6) is connected with along the length direction of rectangle measuring tube between longitudinal centre position, before in rectangle measuring tube, rear tube wall (4, 5) uniformly between polylith longitudinal baffle (7) is connected with, polylith longitudinal baffle (7) is separately positioned between the roof (8) of described lateral partitions (6) and rectangle measuring tube and diapire (9) and length direction along this rectangle measuring tube (6) is arranged, described lateral partitions (6), before polylith longitudinal baffle (7) and rectangle measuring tube, rear tube wall (4, 5), described multiple Measurement channel (3) are formed between roof (8) and diapire (9).

3. Pitot bar gas flow surveying instrument as claimed in claim 1, it is characterized in that: described measuring tube (1) cross section is for circular, axis along this circular measuring tube (1) is provided with installation shaft (10), uniformly between installation shaft (10) and inner-walls of duct (11) be connected with the radial dividing plate (12) of polylith, between the inner-walls of duct (11) of adjacent radial dividing plate (12) and circular measuring tube (1), form described multiple Measurement channel (3).