阅读说明：本技术 一种用于燃烧反应的试验装置及试验方法 (Test device and test method for combustion reaction ) 是由 薛娜 马平 于 2019-11-15 设计创作，主要内容包括：本发明提供的一种用于燃烧反应的试验装置及试验方法,将燃烧材料放置在试管中,然后将注氧管密封在试管上,通过给试管升温,并通过充气装置给试管中注入氧气,即可完成燃烧试样的整个过程,在试验过程中,通过充气装置控制充气量,可明显观察到氧气对燃烧气道的助燃作用,同时燃烧产生的烟雾经过管道进入管路进入烟气囊中,避免烟雾扩散污染试验时的环境,因此,采用该试验装置解决了在没有通风设备进行燃烧试样的问题。(The invention provides a test device and a test method for combustion reaction, wherein a combustion material is placed in a test tube, an oxygen injection tube is sealed on the test tube, the test tube is heated, and oxygen is injected into the test tube through an inflating device, so that the whole process of burning a sample can be completed.)

1. A test device for combustion reaction is characterized by comprising a test tube (2), an oxygen injection tube (1), a smoke bag (5) and an air charging device (7);

the test tube (2) is communicated with the smoke bag (5), and the oxygen injection tube (1) is connected with the air charging device (7);

during the combustion test, annotate oxygen pipe (1) and seal the setting in test tube (2), aerating device (7) are annotated oxygen for test tube (2) through annotating oxygen pipe (1), and smoke gasbag (5) are used for collecting the smog that the burning produced.

2. The test device for the combustion reaction according to claim 1, characterized in that the oxygen injection tube (1) is sleeved with a sealing plug, and the oxygen injection tube (1) is detachably arranged on the test tube (2) through the sealing plug.

3. A test device for combustion reactions according to claim 2, characterized in that the oxygen injection tube (1) is movably arranged in a sealing plug and can slide up and down in the axial direction of the test tube (2).

4. A test unit for a combustion reaction according to claim 1, characterized in that the aerating means (7) is connected to the oxygen injection tube (1) by means of a first hose.

5. A test device for combustion reactions according to claim 4, characterized in that the upper part of the test tube (2) is provided with a by-pass tube, which is connected to the smoke cell (5) by a second hose.

6. The test rig for a combustion reaction of claim 5, further comprising a vacuum pump;

when the test tube is vacuumized, the second hose is connected with a vacuum pump;

when a burning test is performed, the second hose is connected to the smoke bag (5).

7. A test unit for a combustion reaction, according to claim 5, characterized in that said first hose is further provided with a first clamp (8) and said second hose is further provided with a second clamp (9).

8. Test device for combustion reactions according to claim 1, characterized in that the inflation device (7) is located in the sphygmomanometer balloon.

9. A method of testing a test rig for a combustion reaction according to any of claims 1-8, comprising the steps of:

1) the test tube (2) is filled with autoignition substances, and the oxygen injection tube (1) is hermetically connected with the test tube (2);

2) vacuumizing the test tube (2) to enable the test tube to be in a vacuum state;

3) heating the test tube (2) in a vacuum state until the temperature exceeds the ignition point of the spontaneous combustion substances, and observing the reaction of the natural substances under the vacuum condition;

4) injecting oxygen into the test tube (2), heating the test tube (2) until the temperature of the test tube exceeds the ignition point of the spontaneous combustion substances, carrying out combustion reaction on the spontaneous combustion substances, introducing smoke generated by combustion into the smoke bag, and observing the combustion process of the spontaneous combustion substances through the test tube.

Technical Field

The invention relates to a teaching tool, in particular to a test device and a test method for combustion reaction.

Background

The seventh unit topic 1 of the nine-year-old chemical registration of human education, the requirement of the research experiment on the combustion condition is such a rule that the teacher demonstrates the experiment because a large amount of smoke is generated during the combustion process, and therefore the combustion experiment should be performed under the experimental condition of installing a fume hood or an air draft device. However, many laboratories, especially those in the northwest region, do not have fume hoods or ventilation equipment, and after the experiment is finished, the laboratory may be caused to be smoky and turn around, so that the environment pollution of the laboratory is caused, and the health of teachers and students is seriously affected; meanwhile, the common white phosphorus combustion test is carried out underwater, so that the combustion test phenomenon is not obvious, and the observation of the combustion process by students is influenced.

Disclosure of Invention

Aiming at the problem that the diffusion of smoke pollutes the air of a laboratory in a combustion test, the invention provides a test device and a test method for combustion reaction.

The invention is realized by the following technical scheme:

a test device for combustion reaction comprises a test tube, an oxygen injection tube, a smoke air bag and an air charging device;

the test tube is communicated with the smoke bag, and the oxygen injection tube is connected with the inflation device;

during combustion test, the oxygen injection tube is sealed and arranged in the test tube, the air charging device injects oxygen into the test tube through the oxygen injection tube, and the smoke bag is used for collecting smoke generated by combustion.

Preferably, the oxygen injection pipe is sleeved with a sealing plug, and the oxygen injection pipe is detachably arranged on the test tube through the sealing plug.

Preferably, the oxygen injection tube is movably arranged in the sealing plug and can slide up and down along the axial direction of the test tube.

Preferably, the inflator is connected to the oxygen injection tube through a first hose.

Preferably, the upper portion of test tube is provided with the branch road pipe, and the branch road pipe passes through the second hose and is connected with the flue gas bag.

Preferably, the device further comprises a vacuum pump;

when the test tube is vacuumized, the second hose is connected with a vacuum pump;

when a burn test is performed, a second hose is connected to the smoke bag.

Preferably, the first hose is further provided with a first clamp, and the second hose is further provided with a second clamp.

Preferably, the inflation device is located in a sphygmomanometer balloon.

The invention also provides a test method of the test device for the combustion reaction, which comprises the following steps:

1) filling a test tube with a spontaneous combustion substance, and hermetically connecting an oxygen injection tube with the test tube;

2) vacuumizing the test tube to enable the test tube to be in a vacuum state;

3) heating the test tube in a vacuum state until the temperature exceeds the ignition point of a spontaneous combustion substance, and observing the reaction of the natural substance under the vacuum condition;

4) injecting oxygen into the test tube, heating the test tube until the temperature of the test tube exceeds the ignition point of the spontaneous combustion substances, carrying out combustion reaction on the spontaneous combustion substances, introducing smoke generated by combustion into the smoke bag, and observing the combustion process of the spontaneous combustion substances through the test tube.

Compared with the prior art, the invention has the following beneficial technical effects:

according to the test device for the combustion reaction, provided by the invention, the combustion material is placed in the test tube, then the oxygen injection tube is sealed on the test tube, the test tube is heated, and oxygen is injected into the test tube through the inflating device, so that the whole process of combusting the sample can be completed.

Further, through annotating oxygen pipe through sealing plug and test tube sealing connection, the simple operation is convenient for annotate the dismouting of oxygen pipe and test tube.

Furthermore, the oxygen injection tube moves on the sealing plug and can submit the distance between the oxygen outlet end of the oxygen injection tube and the combustion object.

Furthermore, the test tube is vacuumized by a vacuum pump, so that the spontaneous combustion state in a vacuum state is facilitated.

The test method based on the sample device provided by the invention can realize the reaction process of the spontaneous combustion substances in a vacuum state, a normal state and an oxygenation state, and further can observe the state of the spontaneous combustion substances in each state.

Drawings

FIG. 1 is a schematic diagram of a test apparatus of the present invention

FIG. 2 is a schematic view of the mounting of the clamp body of the present invention in a test apparatus.

In the figure: 1. an oxygen injection pipe; 2. a test tube; 3. a smoke pipe; 4. a joint; 5. a smoke cell; 6. a hose; 7. an inflator; 8. a first clamp body; 9. a second clamp body.

Detailed Description

The present invention will now be described in further detail with reference to the attached drawings, which are illustrative, but not limiting, of the present invention.

Referring to fig. 1, a test device for combustion reaction includes a test tube 2, an oxygen injection tube 1, a smoke bag 5 and an inflator 7.

The test tube 2 is communicated with the smoke bag 5, and the oxygen injection tube 1 is connected with the air charging device 7.

During the test, annotate the sealed setting of oxygen pipe 1 in test tube 2, aerating device 7 injects oxygen into test tube 2 through annotating oxygen pipe 1, and gas bag 5 is used for collecting the smog that the burning produced.

According to the test device for the combustion reaction, provided by the invention, the combustion material is placed in the test tube 2, then the oxygen injection tube 1 is sealed on the test tube 2, the test tube is heated, and oxygen is injected into the test tube through the inflating device 7, so that the whole process of burning the sample can be completed.

Test tube 2 is the transparent glass pipe, and the sample personnel of being convenient for observe the combustion process, annotate the cover on the oxygen pipe 1 and be equipped with the sealing plug, during the experiment, install on test tube 2 through the sealing plug on annotating oxygen pipe 1, the lower extreme of annotating the oxygen pipe passes the sealing plug and stretches into to test tube 2 in, the sealing plug adopts the rubber materials preparation, has realized annotating the connection of dismantling of oxygen pipe and test tube 2, has guaranteed the leakproofness when connecting simultaneously.

Simultaneously, annotate oxygen pipe 1 and can also slide on the sealing plug, be convenient for adjust the distance of annotating oxygen pipe 1 lower extreme to test tube 2 bottoms, also be exactly to the distance of comburent, can control the reaction degree of burning.

Be provided with the branch road pipe on the upper portion of test tube 2, the branch road pipe passes through the second hose to be connected with flue gas bag 5, adopts hose connection test tube 2 and flue gas bag 5, reduces the volume of whole device.

The air bag is made of rubber materials, the temperature resistance of the rubber is 150 degrees, the requirement of the test is completely met, and the problem that the air bag is damaged due to the temperature of smoke cannot occur.

Aerating device 7 is the sphygmomanometer sacculus, and the sphygmomanometer sacculus is connected through first hose and the one end of annotating oxygen pipe 1, gives through the sphygmomanometer sacculus and fills oxygen in the test tube, and the simple operation has also simplified test device's structure than professional aeration equipment simultaneously.

Referring to fig. 1, in order to observe the temperature rise of the test tube and the reaction state of the comburent under the vacuum condition, the test device further comprises a first clamp body 8 and a second clamp body 9, wherein the first clamp body 8 is arranged on a first hose connected with the test tube and the inflating device 7, and the second clamp body 9 is arranged on a second hose connected with the smoke air bag and the test tube.

In the test tube was put into to burning material, torn open smoke gasbag 5 to open the second clamp, with second hose and vacuum pump connection, adopt the vacuum pump to carry out the evacuation to the test tube, the evacuation back closes second clamp 9, makes the test tube be in vacuum state, then heats up the test tube, and the burning thing can not take place to burn, can react out, under the environment of oxygen deficiency, can not take place the combustion reaction, can know that oxygen is the prerequisite of burning.

And heating the test tube by adopting hot water when the test tube is heated.

The comburent is white phosphorus or red phosphorus.