CN200959003Y

CN200959003Y - Inflammable air determiner

Info

Publication number: CN200959003Y
Application number: CN 200620046923
Authority: CN
Inventors: 张小沁; 刘刚; 田俊荣
Original assignee: Shanghai Research Institute of Chemical Industry SRICI
Current assignee: Shanghai Research Institute of Chemical Industry SRICI
Priority date: 2006-10-19
Filing date: 2006-10-19
Publication date: 2007-10-10
Anticipated expiration: 2016-10-19

Abstract

A flammable gas measuring equipment is provided, which includes a gas generating device and an eudiometer which are connected by a pipeline, also includes a leveling bottle which is connected with the bottom of the eudiometer. A vent port on the top of the eudiometer is connected with a chamber head which extends to the middle place at the bottom of a flame hood which is positioned above the chamber head, a tube wall of the flame hood is provided with a pair of electrodes which are positioned above the chamber head. The equipment can solve the problem of that the same test can continuously detect the gassing speed and test the gas flammability, which has a value under the conditions of comparatively expensive samples or less samples.

Description

A kind of flammable gas determinator

Technical field

The utility model relates to a kind of flammable gas determinator, or rather, relates to a kind of flammable gas determinator that water is emitted the inflammable gas material of meeting.

Prior art

The N.5 middle regulation of the Section33.4.1.4 Test of the United Nations's " about recommendation of Dangerous Goods Transport " test and manual of standards, the detection method that chance water is emitted the inflammable gas material is as follows: water is injected tap funnel, (solid matter is if frangible or diameter accounts for the material total amount more than 1% less than 500 microns particle being enough to produce 100 milliliters of materials to 250 milliliters of gases, before test, should clay into power whole samples) weigh up and place a conical flask, the tap funnel discharge orifice opened allow water flow into conical flask, and start stopwatch.With the volume of any suitable gas that Instrument measuring discharged, write down and discharge the required time of all gas, and reading in the middle of under possible condition, writing down.Calculate lasting 7 hours gas release rate, calculated once every 1 hour.If release rate is unstable or increased after 7 hours, should prolong minute, the longest is 5.If it is stable or constantly reduce, and obtained sufficient data and material can be delimited a packing classification that release rate becomes, or determine that this material should not put 4.3 under, this test of 5 days can stop.

If it is unknown generating the chemical characteristic of gas, reply gas carries out inflammability test.

But the test method that test and manual of standards Test provide in N.5 after the mensuration gas generating rate, can not be measured the inflammability of unknown gas easily, particularly generates gas and only has under tens milliliters the situation, can't measure especially.

Chinese patent CN 2490569Y discloses a kind of dangerous material and has met the experiment instrument that water is emitted the inflammable gas material, this experiment instrument utilizes measured matter to meet water and discharges water in the gas extruding gas bottle, make it to enter a beaker that places on the balance, calculate the burst size of gas by the quality of weighing water, whether measure this gas as needs inflammable, then need to open the another one gas vent of conical flask, light the gas of outlet, determine whether this gas is inflammable.But this method does not have igniter head safety insulating device, if mixed gas has tempering to cause the possibility of bottle interior gas burst in explosion limits in the conical flask when then gas is lighted.Secondly, light for combustion flames such as hydrogen, the gaseous combustion that naked eyes are difficult for observation causes erroneous judgement easily.

Summary of the invention

The purpose of this utility model provides a kind of flammable gas determinator that water is emitted the inflammable gas material of meeting.

The utility model is to realize like this.

Flammable gas determinator of the present utility model comprises gas generating unit and

eudiometer tube

9,12 of the air intake openings of gas generating unit and eudiometer tube 9 have pipeline 7 to be connected, this device also comprises leveling bottle 11, the bottom of leveling bottle 11 and eudiometer tube 9 has pipeline 10 to be connected, exhausr port 13 at eudiometer tube 9 tops is connected with combustion head 14, the top of combustion head 14 is provided with burning cover 2, be stamped paper cap 1 at the top of burning cover 2, be beneficial to the gathering of gas, and when burning, tear the effect that breach plays decompression easily.Combustion head 14 extend in the burning cover 2, is positioned at the centre position of its underpart, is mounted with pair of electrodes 4 on burning cover 2 tube walls, and electrode 4 is positioned at the top of combustion head 14, lights a fire with High Level AC Voltage moment generation electric arc.

Determinator described in the utility model is provided with a temperature thermopair 3 above burning cover electrode 4, the temperature that temperature thermopair 3 is measured can be shown by DIGITAL TEMPERATURE DEMONSTRATOR 6, can make sensitive reaction to the combustion phenomena that naked eyes are difficult for observing.For example: hydrogen flame when burning is normally colourless, can judge by the temperature variation on the temperature indicator.

Determinator described in the utility model, described combustion head 14 is directly installed on the exhausr port 13 of eudiometer tube 9, comprise combustion head outer wall 16, inner chamber 17 and taper port 15, be filled with copper wire 18 in the combustion head inner chamber 17, in case the non-return fire causes air and the blast of tested gaseous mixture in the eudiometer tube.

Determinator described in the utility model, described gas generating unit is made of separating funnel 5 and conical flask 8.

Flammable gas determinator of the present utility model compared with prior art can solve same test and carry out continuously that gas generating rate is measured and gas flammability is tested, and relatively has meaning especially under the fewer situation of costliness or sample size at sample.In addition, also can measure a small amount of gas (about about 30 milliliters), fewer or sample produces gas itself with regard under the fewer situation after meeting water in sample size, has solved the mensuration problem of gas flammability.

Description of drawings

Fig. 1 is the structural representation of determinator one specific embodiment of the present utility model.

Fig. 2 is the structural representation of determinator combustion head of the present utility model.

Shown in the number in the figure:

The 1-paper cap, 2-burning cover, 3-thermopair, the 4-electrode, 5-separating funnel, 6-DIGITAL TEMPERATURE DEMONSTRATOR, the 7-pipeline, 8-conical flask, 9-eudiometer tube, the 10-pipeline, 11-leveling bottle, 12-eudiometer tube air intake opening, 13-eudiometer tube exhausr port, 14-combustion head, 15-taper port, 16-combustion head outer wall, 17-combustion head inner chamber, 18-copper wire.

Embodiment

Further specify the utility model below by the detailed description to a specific embodiment of the present utility model, still, the utility model is not limited to these embodiment.

As depicted in figs. 1 and 2, flammable gas determinator of the present utility model comprises separating funnel 5, conical flask 8, eudiometer tube 9 and

leveling bottle

11,12 of conical flask 8 and eudiometer tube air intake openings have pipeline 7 to be connected, and the bottom of leveling bottle 11 and eudiometer tube 9 has pipeline 10 to be connected.Exhausr port 13 at the eudiometer tube top is connected with combustion head 14, and the top of combustion head 14 is provided with burning cover 2 cylindraceous, is stamped paper cap 1 at the top of burning cover 2.Combustion head 14 extend in the burning cover 2, is positioned at the centre position of its underpart, and described combustion head 14 is directly installed on the eudiometer tube exhausr port 13, comprises combustion head outer wall 16, inner chamber 17 and taper port 15, is filled with copper wire 18 in the combustion head inner chamber 17.Be mounted with pair of electrodes 4 on burning cover 2 tube walls, electrode 4 is positioned at the top of combustion head 14.One temperature thermopair 3 is set above burning cover electrode 4, and the temperature that temperature thermopair 3 is measured is shown by DIGITAL TEMPERATURE DEMONSTRATOR 6.

The course of work of flammable gas determinator of the present utility model is: at first collect reactive material and meet the gas that water generates, question response 7 hours is when liquid level keeps constant substantially in the eudiometer tube later, the vent hole of opening tracheae, promote leveling bottle, make the gas of generation constantly enter cross glass burning cover, constantly click the ignition switch of high-field electrode simultaneously, rise above 20 ℃, think that then this gas is flammable if obviously see combustion flame or digital temperature display instrument displays temperature.If test findings is a "No", topped up with water in separating funnel then, open knob then and flow into conical flask by water, gas in the conical flask is arranged to eudiometer tube, repeat the operating process of front then, rise above 20 ℃ if obviously see combustion flame or thermopair displays temperature, think that then this gas is flammable.

Be that example is described further the operating position of installing below with the lithium metal.

In separating funnel 5, add 20mL water,, place conical flask 8, water in the separating funnel 5 is injected conical flask 8, and start the stopwatch record gas required time of release with the accurate weighing 0.04g of balance lithium metal.Mobile leveling bottle 11 is consistent its liquid level and eudiometer tube 9 interior liquid levels, and gas discharges and finishes behind the 1min, and the gas volume readings are 75mL in the eudiometer tube 9.

Opening tracheae exhausr port 13, promote leveling bottle 11, make the gas of generation constantly enter glass burning cover 2, simultaneously, constantly click the ignition switch of high-field electrode 4, (flame was close to colourless when hydrogen burnt in air to can't see tangible flame combustion during igniting, naked eyes are not easy to identify), but DIGITAL TEMPERATURE DEMONSTRATOR 6 displays temperatures have risen 56 ℃, so, think that the gas that discharges is flammable in the reaction.

Flammable gas determinator of the present utility model is applicable to the mensuration of emitting the gas inflammability of inflammable gas material behind any chance water.These materials comprise materials such as metal simple-substances such as lithium metal, sodium, potassium, calcium, magnesium, aluminium, zinc, metal powder, metal alloy, metal hydride, metal carbide, metal silicide, metal phosphide, hydroborate.

Claims

1, a kind of flammable gas determinator, comprise gas generating unit and eudiometer tube (9), there is pipeline (7) to be connected between the air intake opening (12) of gas generating unit and eudiometer tube (9), it is characterized in that: this device also comprises leveling bottle (11), the bottom of leveling bottle (11) and eudiometer tube (9) has pipeline (10) to be connected, exhausr port (13) at eudiometer tube (9) top is connected with combustion head (14), the top of combustion head (14) is provided with burning cover (2), combustion head (14) extend in the burning cover (2), be positioned at the centre position of its underpart, be mounted with pair of electrodes (4) on burning cover (2) tube wall, electrode (4) is positioned at the top of combustion head (14).

2, determinator according to claim 1 is characterized in that: a temperature thermopair (3) is set in the top of burning cover electrode (4), and the temperature that temperature thermopair (3) is measured is shown by temperature indicator (6).

3, determinator according to claim 1 is characterized in that: be stamped paper cap (1) at the top of burning cover (2).

4, determinator according to claim 1 is characterized in that: described combustion head (14) comprises combustion head outer wall (16), inner chamber (17) and taper port (15), is filled with copper wire (18) in the combustion head inner chamber (17).

5, determinator according to claim 1 is characterized in that: described gas generating unit is made of separating funnel (5) and conical flask (8).