JPS5970912A - Apparatus for measuring air flow amount of draft chamber - Google Patents

Abstract

PURPOSE:To achieve longtime continuous use and accurate measurement, by providing an air flow velocity sensor for detecting the bypass air flow velocity Vs of the air sucked into an exhaust dust in a bypass part provided to the exhaust duct so as to be communicated with the air. CONSTITUTION:The gas generated in a draft chamber main body 1 is exhausted from an exhaust duct 3 through an exhaust port 17 and a bypass air duct 19 the air flowed into said draft chamber main body 1 at appropriate inflow wind velocity from a front opening part 9. At this time, gas with low specific gravity is flowed into the exhaust duct 3 through the exhaust port 17 while gas with high specific gravity is flowed into the exhaust duct 3 through the bypass air duct 19. By the exhausion from the exhaust duct, 3 the air is sucked into the exhaust duct 3 from a bypass part 5 and the bypass wind velocity V3 of the air when the air is sucked into the bypass part 5 is detected by an air flow velocity sensor 7. The bypass flow velocity Vs is converted to the exhaust amount Q of the exhaust duct 3 by an operation apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wind measurement device for troughs 1 to 1 and 2.

The purpose of the tray chamber 11 is to protect the experimenter from harmful gases generated during experiments, and its important function is to exhaust harmful gases generated inside the chamber body. It is the exhaust capacity.

Normally, the exhaust capacity of the draft chamber is expressed as the rate of inflow of outside air from the front opening.

On the other hand, Jlfm discharged per minute (m3/mi
+1) - Area of front opening (m2) x inflow wind speed (m/
sec) x60.

The inflow wind speed is set, for example, by the content of the experiment conducted within the trough 1-17 chamber body, ie, the type of gas a3 generated by the experiment, the suspension, etc.

Therefore, the safety of trough 1~deyanbar (IT "
In order to maintain this condition, it is necessary to check the operating condition, whether the wind speed is appropriate, and whether the wind speed is appropriate.
This can be done by measuring the amount of air discharged from the 111 air ducts (-) of the drums 71 to 111.

Therefore, in order to measure the amount of exhaust air being discharged, a wind speed sensor similar to the hot wire wind speed side was installed in the exhaust duct.
One possible method is to convert the exhaust air volume from the Jl air duct into a wind speed value and directly measure it.

However, the gas generated inside the main body of the draft chamber is often extremely corrosive, and in addition to the gas, there are also cases where mistakes 1~ occur.

Therefore, if the wind speed sensor is installed directly in the tact, there is a problem that the measuring part will be attacked by corrosive forces and cannot withstand long-term use. There is a problem in that the measuring section malfunctions and accurate measurements cannot be made because the mist (=J) reaches the measuring section.

This invention was devised in view of the above-mentioned problems, and is capable of withstanding continuous use for long periods of time.
The purpose of this invention is to provide a wind can measuring device that can measure the temperature of the drums 71 to Bouyanbar.

In order to achieve this object, the present invention eliminates the gas generated inside the main body 1 of the drive unit 71 to the jamba unit 1,
In the draft distiller which discharges air through the JJI air tank 1-3, a bypass section 5 through which outside air passes through the exhaust gas tank 1-3 is located on the suction side of the shellfish removal machine.
, a speed sensor 7 for detecting the bypass wind speed Vs of the outside air taken into the exhaust duct 3 through the bar path section 5 is provided in the bypass section 5, and the detected value of the wind speed sensor 7 is According to the IJI Q 1 < 3, there is a C of trying to measure the FAI Q.

Hereinafter, one embodiment of the present invention will be explained in detail using the drawings.

Fig. 1 and Fig. 2 show one pilaf 1-chi 1 non-ba (the front view and side sectional view of A1 are not shown).
A glass door 11 is installed at the top, and an exhaust duct 3 is installed at the top. The hanging tool 13 is hoisted up and lowered via a pulley 15 so that it can be moved up and down.Then, by moving the crow 11 up and down, the front space 1] section 9 is moved up and down. The frontage area can be adjusted.

The inside of the trough 1 hedge I7 is the above-mentioned J and II.
A 1-1 river hole 17 communicating with the air duct 1-3 and a bypass air passage are provided. Said JJI ff+l 7
L17 is connected to the upper wall 21, and the bypass air passage 19 is formed by the rear wall 23 of the main body 1 and a baffle plate 1-25 hanging from the rear end of the upper wall 21. .

The exhaust ducts 1 to 3 are provided with an IJI fan (not shown), and are also provided with a bypass section 5 located on the suction side of the fan and communicating with outside air.

As shown in FIGS. 3 and 4, the bypass section 5 includes a suction section 27 that sucks in outside air, and an insertion section 33 that is inserted into a through hole 31 formed in the cylindrical wall 29 of the exhaust duct 3. What does it consist of?
The cylinder diameter of the suction part 27 is formed to be larger than the cylinder diameter d of the insertion part 33, so that the wind speed of the outside air sucked into the suction part 27 is reduced.

The suction section 27 of the bypass section 5 has a hot wire method fl for detecting the bypass wind speed Vs of the outside air sucked into the suction section 27.
A first-class wind speed sensor 7 is mounted on the J3, and the bypass wind speed Vs of the bypass section 5 detected by the wind speed sensor 7 is sent to a not-shown ohm device to output the 4 Jl pressure of 3 to the exhaust duct 1. It is configured to convert into 1fitQ, install it on the operation panel 35, and display it on a digital display 37.

Next, I will explain the effect.

The generated gas inside the trough 1 and the main body 1 is transferred to the exhaust duct 1 through the exhaust hole 17 and one bypass air path by outside air flowing in from the front opening 9 at an appropriate inflow wind speed. 1 no 1 is issued from. At this time, the gas with low specific gravity flows into the exhaust duct 3 through the exhaust hole 17, and the gas with high specific gravity flows into the exhaust ducts 1 to 3 through the bypass air path 19.

The bypass section 5 is discharged from JJI air ducts 1 to 3.
Outside air is drawn into the exhaust gases 1-3.

The bypass wind speed Vs of the outside air when it is sucked into the bypass section 5 is Jll speed-ranged, and J, y-(J is detected at -7.

Since the bypass wind speed Vs has a certain correlation with the exhaust IQ of the exhaust tact 3,
The bypass wind speed Vs detected as ζ is converted into the wind speed Q of the exhaust ducts 1 to 3 by the oil cylinder device, and is displayed on the digital display 37.

Therefore, by detecting the bypass wind speed VS of the bypass section 5, the exhaust air mQ of the exhaust duct 3 can be measured.

As is clear from the above, according to the configuration of the present invention, the measuring section of the tumbler is not exposed to corrosive gas or mist generated inside the main body of the drum 71 to the chamber for a long period of time. This makes it possible to withstand continuous use and to make accurate measurements. In addition, if the bypass section is installed in a suitable manner, the cylinder diameter of the intake section of the bypass section can be set to any size and used interchangeably, so it can be set to the optimum measurement range of the wind speed sensor. , it can correspond to a wide range of measurement ranges of exhaust air volume.

It should be noted that this invention is not limited to the above-mentioned embodiment, and it is possible to carry out the invention in modes other than the above-mentioned embodiment.
! i! It can be widely applied to I velocity measurement.

In order to make it easier to refer to the drawings in the section 17. Scope of Request for Revised Items, the reference numerals are not written, but the reference numerals do not limit the technical scope of this invention. do not have.

[Brief explanation of the drawing]

The fourth page shows one embodiment of the present invention, and the first
2 are a front view and a side sectional view of a drum 71 to a chamber equipped with a wind 11 measuring device according to the present invention, and FIG.
FIG. 4 is a plan view and a partially cutaway side view of the main part. (Explanation of symbols that represent the main parts of the drawing) 1...
Pilaf 1 ~ Chimba one by one 3... Exhaust duct 5... Bypass section 7...
・Wind speed sensor Vs...Bypass wind speed Q...
Exhaust air volume Fig. 1-5: Fig. 2 Fig. 4 1,000 Uji net tlj, +i [= bow (method) March 1981/Doguchi Patent Office Commissioner Kazuo Wakasugi 1, matter 1 '1 Indication Patent Application No. 181774 of 1981 2, Title of the Invention Trough 1-Ch 17-imper J-m Measuring Device 3;
What is the relationship between the Oriruishi Incident? Patent 5'1 Applicant I 1 (Residence) 2-9-5 Nihonbashi Ho-cho, Chuo-ku, Tokyo Name (Name): AI Ma': Ministry of Representative Affairs, Mori Tatsumi Kawa 4, Agent I”1 Address 1-1 Toranomon, Minato-ku, Tokyo 105
No. 18 New Toranomon Building 8th Floor Telephone: Tsukou (504) 3075, 3076, 3077
Number 5.7 + Li Positive Order Day I” February 2, 1982
Day 6, Subject of amendment (1) Application form (2) January office door 7 (3) Commission handling 7, Contents of amendment (1) Single page yen tD'';'j (2) Engraving I3 in the details 4L Tomoe 8, 4L Inventory (1) Request RL: 1 letter

Claims (1)

[Claims] A draught 7 for discharging the gas generated inside the draft aluminum chamber 1 through the exhaust duct 3 using an air blower.
A bypass section 5 that communicates with outside air is provided in the exhaust duct 3 on the suction side of the exhaust fan, and the exhaust duct 3 is connected to the exhaust duct 3 in the bypass section 5 through the bypass section 5. The draft is characterized in that a wind speed sensor 7 is installed to detect the bypass wind speed VS of the outside air taken in by the air flow system. Chamber air flow measurement facility.