CN2509497Y

CN2509497Y - Air exhausting apparatus for chemical education equipment

Info

Publication number: CN2509497Y
Application number: CN 01251109
Authority: CN
Inventors: 毛正清
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-10-23
Filing date: 2001-10-23
Publication date: 2002-09-04
Anticipated expiration: 2011-10-23

Abstract

The utility model provides an air exhausting apparatus for chemical education device, mainly comprising an underground air exhausting main pipeline and an air intake which is arranged on the air exhausting main pipeline and can be communicated with the air exhausting branch pipeline on the experimental bench. A muffler is arranged on the air exhausting main pipeline and is corresponding with the air intake. The section of the air exhausting main pipeline takes a square shaper, with a caliber changing smaller from front to back. One side of the lower air intake appears an inclined opening. The utility model can effectively ensure even air speed at the front and the back of the cover opening of the air cover on the experimental bench so as to reduce resistance and provide convenience for the floor pavement and the connection with the air inlet and the air outlet of the air fan, moreover, the utility model greatly decreases the noise due to an additional muffler.

Description

Chemistry teaching equipment air exhausting device

Technical field:

The utility model relates to a kind of air exhausting device, specifically a kind of chemistry teaching equipment air exhausting device.

Background technology:

Its underground air draft trunk line of air exhausting device that is used for chemistry teaching equipment is at present mostly used the UPVC pipe, and caliber size in front and back is consistent.Cause back space to strengthen, resistance strengthens, and causes that fan housing cover mouth front and back wind speed is inhomogeneous on the experimental bench; The underground air draft person in charge is connected with the air draft arm is vertical, and no angle increases flowing resistance, produces noise; There is not silencing apparatus in the import department that is responsible in air draft, and the influence of noise education experiment that produces is responsible in underground air draft; The advancing of blower fan, exhaust outlet are square opening and are connected with pipe, can strengthen the friction of air and air during the air intake air draft, strengthen noise, resistance.

Summary of the invention:

At the deficiency that above-mentioned prior art exists, the purpose of this utility model provides the chemistry teaching equipment air exhausting device that a kind of wind speed is even, noise is low, easy for installation.

The purpose of this utility model is to realize like this, it comprises underground air draft trunk line and is located at the ventilating opening that can be communicated with air draft branch pipe(tube) on the experimental bench on this air draft trunk line, it is characterized in that: the cross section of air draft trunk line is square, the bore of this pipe from large to small from front to back, ventilating opening lower end one side that is communicated with the air draft branch pipe(tube) is angle, on the air draft trunk line downside that should ventilating opening is provided with silencer.

The utility model since the bore of air draft trunk line from large to small from front to back, and section is square, and can guarantee effectively on the experimental bench that wind speed is even before and after the fan housing cover mouth, reduces resistance, and is convenient to ground and lays and link to each other with the advancing of blower fan, exhaust outlet.Particularly set up silencer, noise is reduced greatly.

Description of drawings:

Fig. 1 is the utility model structural representation.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the A-A profile among Fig. 1.

Fig. 4 is the B-B profile among Fig. 1.

Fig. 5 is the ventilating opening structure schematic diagram.

The specific embodiment:

By accompanying drawing as can be known, the utility model mainly comprises underground air draft trunk line 1 and is located at and can be communicated with the ventilating opening 2 of air draft branch pipe(tube) on the experimental bench on this air draft trunk line and the set silencer 3 of corresponding ventilating opening 2 on air draft trunk line 1.The cross section of air draft trunk line 1 (see figure 3) that is square, the bore of air draft trunk line 1 be (see figure 1) from large to small from front to back.Ventilating opening 2 lower ends one side is the angle (see figure 5).Silencer 3 comprise a sealed outer pipe 3-1 and one place the interior pipe 3-2 that has porous in the sealing outer tube and place sealed outer pipe 3-1 and porous inner tube 3-2 between the cotton 3-3 (see figure 4) of noise elimination.

Claims

1, a kind of chemistry teaching equipment air exhausting device, it comprises underground air draft trunk line and is located at the ventilating opening that can be communicated with air draft branch pipe(tube) on the experimental bench on this air draft trunk line, it is characterized in that: the cross section of air draft trunk line is square, the bore of this pipe from large to small from front to back, ventilating opening lower end one side that is communicated with the air draft branch pipe(tube) is angle, on the air draft trunk line downside that should ventilating opening is provided with silencer.

2, chemistry teaching equipment air exhausting device as claimed in claim 1 is characterized in that: described silencer comprise a sealed outer pipe and one place the interior pipe that has porous in the sealing outer tube and place sealed outer pipe and porous inner tube between the noise elimination cotton.