CN86209431U

CN86209431U - Tuyere speed measuring pipe

Info

Publication number: CN86209431U
Application number: CN 86209431
Authority: CN
Inventors: 郭茂先
Original assignee: Yan Wengong Feng Sufan
Current assignee: Yan Wengong Feng Sufan
Priority date: 1986-11-18
Filing date: 1986-11-18
Publication date: 1987-09-16

Abstract

The utility model discloses a tuyere speed measuring pipe, which is used for measuring flow velocity of the tuyere at industrial furnaces. The utility model mainly comprises a probe, a connecting pipe and a pipe joint. The tuyere speed measuring pipe is characterized in that the probe part comprises a plurality of different diametric metal pipes which are sheathed and combined together; the metal pipe is designed to a plurality of thin air channels and air holes, the connecting pipe is formed by two different diametric metal pipes which are sheathed together, and the inner pipe and the outer pipe are formed. The outer pipe is drilled with a plurality of small holes which can transmit the static pressure. The inner pipe transmits the total pressure. The utility model can measure the full pressure and the static pressure of the tuyere at industrial furnaces, and can measure the resistance loss of airflow at tuyere in use.

Description

Tuyere speed measuring pipe

The utility model relates to a kind of air port air blast flow velocity and flow measurement of thermal measurement instrument, particularly used for industrial furnace, and the static pressure of air blast and drag losses measurement.

Some industrial furnaces are provided with the air port both at home and abroad at present, and air-supplied or oxygen-enriched air blast is as blast furnace, change iron cupola furnace, copper converter.These industrial furnaces are surveyed wind difficulty especially.Common pipeline gas flow velocity can be measured with pitot tube at present, and this measuring method can not be inserted the stove air port because pitot tube is an elbow, can not be used for measuring the flow velocity of gas in the air port.

The purpose of the invention provides a kind of simple and easy inexpensive and can accurately measure the measuring tube of stove air port gas flow rate, and can be used for measuring flow, static pressure and the drag losses of place, air port gas.

The main points of the invention are: adopt similar pitot tube measuring principle, two groups of gaging holes are set on the direct rod shape measuring tube of metal pipe box system, measure the total head and the static pressure of measuring point place gas respectively, both differences promptly equal the dynamic pressure of gas, according to dynamic pressure and static pressure, calculate flow velocity.This measuring tube mainly is made of probe, connecting pipe, pipe adapter three parts.Probe segment is combined into by the metal tube suit of several different-diameters, be provided with a plurality of tiny air channels or wind hole on the metal tube again, communicate with the interior pipe of connecting pipe, the air channel opening meets to air-flow, the total head, the pilot tube portion that are used for experiencing tested air-flow have constituted interior pipe, outer tube by the metal tube suit of two different-diameters.Be drilled with a plurality of wind hole on the outer tube, in order to experience the static pressure of air-flow.Interior pipe transmits total head, outer tube transmits static pressure.The inner and outer pipe tail end is respectively equipped with joint, when measuring gases at high pressure, connects two tensimeters respectively, respectively connects the U-shaped pressure gauge when measuring low-pressure gas.

The advantage of this measuring tube is, it be a kind of metal straight pipe, firm in structure, manufacture simple, can insert in the air port as drill rod, directly accurately measure the gas flow rate in the industrial furnace air port, can accurately measure the static pressure of gas and total head and gas drag losses simultaneously through the air port.

Below in conjunction with accompanying drawing the present invention is described in further details.

Accompanying drawing 1 is a structure cut-open view of the present utility model.

Accompanying drawing 2 is the utility model probe position cross-section cutaway views.

Accompanying drawing 3 is connecting pipe of the present utility model position cross-section cutaway views.

With reference to accompanying drawing 1,2,3, it is a measuring tube that is combined by the metal tube of four different-diameters.Its structure is, at first has the metal tube (7) of two different-diameters to be outer tube, diameter phi 14mm, and (8) are interior pipe, diameter phi 10mm.The afterbody joint (12) of inner and outer pipe is located outer tube seal weld dead, and interior pipe is unimpeded.The connecting pipe afterbody is provided with a static tube joint (11) and communicates with outer tube (7) by wind hole (9).The wind bore dia is φ 3～4mm, and with a reinforcement (10) outer tube (7) and static tube joint (11) is welded to each other.The front end of connecting pipe (7), (8) (probe position (T)) again cover load onto two short metal tubes, be about 30～40mm, a probe cap (5), a guide duct (2), promptly whole probe (T position) are that the metal tube suit of four different-diameters forms.Guide duct (2) in the probe is done the rectangle elongated slot (4) of four symmetrical distributions, and is logical as air channel and outer gas phase.Pipe (8) is longer than outer tube (7) is drilled with four symmetrical distributions at the position that grows wind hole (3) in the connecting pipe in the probe, and the aperture is φ 1mm, and outer tube (7) is welded on the wall of interior pipe (8).To manage (8), (5), (2) left front end weldering extremely, and be circular-arc weld bond (1).Four the wind holes (6), the aperture that also are drilled with symmetrical distribution on outer tube (7) are φ 1mm, and the position in hole is apart from the about 60～70mm of probe front end.During work: air-flow is from elongated slot (4) pipe (8) feed pressure table in wind hole (3) pass through connecting pipe at probe position, the total head of reading air-flow.Read air-flow static pressure through static tube joint (10) by tensimeter by hole (9) through outer tube (7) by aperture (6) again.Obtain thus: dynamic pressure=total head-static pressure has also obtained measuring flow velocity and air port gas-flow resistance loss in the air port simultaneously.

Claims

1, a kind of air port pitot tube, mainly constituted by probe, connecting pipe, pipe adapter, it is characterized in that: probe segment is combined by the metal tube suit of several different-diameters, be provided with a plurality of tiny air channels or wind hole on the metal tube again, communicate with the interior pipe [8] of connecting pipe, connecting pipe constitutes interior pipe, outer tube by the metal tube suit of two different-diameters, and a plurality of wind hole is gone up and be drilled with to outer tube [7].

2, by the described pitot tube of claim 1, it is characterized in that: the guide duct (2) in the probe is done the rectangle elongated slot of four symmetrical distributions, pipe (8) is longer than outer tube (7) in the connecting pipe in the probe position, is drilled with the wind hole (3) of four symmetrical distributions at the position that grows.

3, by the described pitot tube of claim 2, it is characterized in that: be drilled with the wind hole (6) of four symmetrical distributions on the outer tube (7) of connecting pipe, the connecting pipe afterbody is provided with a static tube joint (11) and communicates with outer tube by wind hole (9).