CN2473596Y

CN2473596Y - Standard multiple probe blowing rate measuring sensor

Info

Publication number: CN2473596Y
Application number: CN 01218163
Authority: CN
Inventors: 张庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-04-01
Filing date: 2001-04-01
Publication date: 2002-01-23
Anticipated expiration: 2011-04-01

Abstract

Provided is a standard multi probe air volume measurement sensor, the structure is that the sensor is installed with two parallel equalers at the direction perpendicular to the flange, the equalers are installed with a plurality of probes, the sensor is fixedly and accurately installed in the duct by the flange and the guide rail, the high precision automatic monitoring can be completed by the probe measurement and the equalers averaging and the signal conversion of the pressure difference transmission and the flow totalizer, the sensor can realize grid method measurement, and is high in precision, the flow coefficient K and the measured working medium flow are provided with a linear relationship, the structure is simple, the performance is reliable, the sensor can be installed and maintained when the blower is running, and is provided with wide extension application value.

Description

The standard air measuring sensor of popping one's head in more

The utility model relates to a kind of air measuring sensor, especially a kind of standard air measuring sensor of popping one's head in more.

At present, the air measuring sensor is broadly divided into two big classes: a class is a throttle type, as venturi, wing etc., another kind of is non-throttle type, as backing tube, bourdon's tube, in above-mentioned two class devices, the former generally is applied in the lower air channel of wind speed, by throttling the dynamic pressure signal is amplified to improve measuring accuracy, but its shortcoming is: throttling increases the energy loss of duct resistance and gas flow, causes exert oneself reductions, power consumption of blower fan to increase, in the time of seriously even influence ordinary production, though bourdon's tube, backing tube are simple in structure, measuring accuracy is lower.These devices are non-standard measurement mechanism, and flow coefficient k is a nonlinear relationship with the gas flow rate of surveying.Just because of traditional measurement mechanism exists various deficiencies, so the speed measuring device that disposes on air channel, blower fan or other equipment mostly is removed or stops using a few years ago.

The utility model proposes a kind of standard air measuring sensor of popping one's head in, it is low that it can solve precision effectively more, makes the installation cost height, and flow coefficient k is a nonlinear relationship with the working medium flow of surveying, and can't realize the difficult problem that industrial automation is monitored.

The purpose of this utility model is achieved in that inner flange (1) is connected with outside flange (2) by bolt, on inner flange (1) face, fixture splice (3) is perpendicular to inner flange (1) parallel installation metal static pressure balance pipe (4) and the even pressure pipe (5) of total head, on static pressure balance pipe (4) and total head balance pipe (5), a plurality of pipe nipples (8) are installed, pipe nipple (8) one ends are fixedlyed connected with static pressure balance pipe (4) and the even pressure pipe (5) of total head, the other end is connected with probe (6) by screw thread with movable joint (7), probe (6) head is a hemisphere, there is the total head gaging hole (6-2) of a circle at the center, be drilled with several circular static openings (6-1) along circumference one circle in the middle of the probe, the interval of static pressure balance pipe (4) and total head balance pipe (5) is by location-plate (9) positioning and fixing.

Owing to adopted such scheme, need not working medium is carried out throttling, can design measuring point quantity according to actual needs, the realization gridding method is measured, sensor measurement precision height, flow coefficient k is stable, and pressure sensing hole is difficult for stopping up, system architecture is simple in addition, cost is low, be easy to advantages such as installation and maintenance, is highly suitable for on-line automaticization of the air quantity monitoring in large and medium-sized air channel.

Below in conjunction with drawings and Examples the utility model is further described:

Figure-1 is structural representation of the present utility model (side view);

Figure-2 is that the utility model C-C is to figure;

Among the figure, 1 inner flange, 2 outside flanges, 3 fixture splices, 4 static pressure balance pipes, 5 total head balance pipes, 6 probe 6-1 static opening 6-2 total head gaging hole 7 and joint 8 pipe nipples 9 location-plate 9-1 pilot hole B airflow directions

In the drawings, outside flange (2) can steadily be fixed on this sensor in the air channel with air channel welding one.The total head gaging hole (6-2) of the head center of probe (improvement forms according to standard Pitot tube measuring principle), it is the pressure sensing hole that is used for measuring the working medium total head, baroport (6-1) around in the middle of the probe is the pressure sensing hole that is used for measuring the working medium static pressure, the pressure signal that two holes are surveyed, pass through two signal efferent ducts of probe respectively, import static pressure balance pipe (4) and total head balance pipe (5) into, after mixing, on the one hand that each probe is the measured pressure signal of balance pipe obtains mean pressure, on the other hand the pressure signal after average is transferred to differential pressure transmitter, convert pressure signal to electric signal, the calculating by flow totalizer can realize high-precision air quantity on-line monitoring.Its flow coefficient k is stable, can carry out automatically-monitored.There is a pilot hole (9-1) at location-plate (9) center, after in the air channel guide rail being fixed, guide rail is penetrated pilot hole, just this sensor can be installed and fixed smoothly, and can guarantee setting angle comparatively accurately.Static opening in the sensor (6-1) and total head gaging hole (6-2) are though diameter is less, and its position all is located at windward side, so be difficult for stopping up.

Claims

1, a kind of standard air measuring sensor of popping one's head in more, form by balance pipe and probe, it is characterized in that: inner flange (1) is connected with outside flange (2) by bolt, on inner flange (1) face, perpendicular to inner flange (1) a metal static pressure balance pipe (4) and a total head balance pipe (5) are installed abreast by fixture splice (3), on static pressure balance pipe (4) and total head balance pipe (5), a plurality of pipe nipples (8) are installed, pipe nipple (8) one ends are fixedlyed connected with static pressure balance pipe (4) and total head balance pipe (5), the other end is connected with probe (6) by screw thread with movable joint (7), probe (6) head is a hemisphere, there is the total head gaging hole (6-2) of a circle at the center, evenly be drilled with several circular static openings (6-1) along circumference one circle in the middle of the probe, the interval  of static pressure balance pipe (4) and total head balance pipe (5) positions fixing by location-plate (9).

2, standard probe measurement sensor according to claim 1 is characterized in that: the direct and air channel welding of the outer rim of outside flange (2).

3, standard probe measurement sensor according to claim 1 is characterized in that: in the centre of location-plate (9) pilot hole (9-1) is arranged.