CN210925153U

CN210925153U - Hydrogen and air mixed gas explosion experiment teaching device

Info

Publication number: CN210925153U
Application number: CN201922213183.6U
Authority: CN
Inventors: 马仲海; 马兰
Original assignee: Individual
Current assignee: Ma Zhonghai
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-07-03
Anticipated expiration: 2029-12-11

Abstract

The utility model discloses a mist explosion experiment teaching device of hydrogen and air, the device include transparent bottle and ignition mechanism, the bottle end of transparent bottle is provided with the jack, ignition mechanism's ignition end passes through inside the jack inserts transparent bottle, set up hydrogen air feed subassembly in the bottleneck of transparent bottle. The utility model discloses during can solving the mist explosion experiment of present hydrogen and air, because only ignite after letting in hydrogen in the test tube, come to the student show the mist of explanation hydrogen and air, can the phenomenon of exploding after the ignition for the experimental phenomenon is not obvious or produces less explosion sound, gives student's the not deep problem of classroom teaching impression.

Description

Hydrogen and air mixed gas explosion experiment teaching device

Technical Field

The utility model relates to an experiment teaching aid technical field, in particular to mist explosion experiment teaching device of hydrogen and air.

Background

In the experiment for testing impure hydrogen, which is carried out by introducing hydrogen into a test tube and then igniting the test tube, 79 pages (upper) of ' figure 4-23 ' of ' teaching edition of people of ' chemistry ' in nine grades show that the mixed gas of hydrogen and air can be demonstrated to students, and the phenomenon of explosion can occur after ignition, so that the experimental phenomenon is not obvious or a small detonation sound is generated, the impression of teaching in class of students is not profound, and the sufficient attention of the students on the purity of hydrogen testing and the safety of experiments is not brought.

SUMMERY OF THE UTILITY MODEL

To the technical problem, the utility model provides a mist explosion experiment teaching device of hydrogen and air can effectively solve during the mist explosion experiment of present hydrogen and air, owing to only ignite after letting in hydrogen in the test tube, comes to demonstrate the mist of hydrogen and air to the student, can the phenomenon that explodes after the ignition for the experiment phenomenon is not obvious or produces less detonation, gives student's classroom teaching impression not deep problem.

In order to achieve the above object, the technical solution of the present invention is specifically as follows:

the mixed gas explosion experiment teaching device of hydrogen and air comprises a transparent bottle body and an ignition mechanism, wherein a jack is arranged at the bottom of the transparent bottle body, the ignition end of the ignition mechanism passes through the jack and is inserted into the transparent bottle body, and a hydrogen gas supply assembly is arranged in the bottle mouth of the transparent bottle body.

The ignition mechanism is an electronic igniter, a lead is connected to the discharge end of the electronic igniter, and the tail end of the lead is inserted into the jack and used for igniting the mixed gas of hydrogen and air in the transparent bottle body.

And a sealing ring is arranged on the jack, and an ignition end of an ignition mechanism is inserted into a central hole of the sealing ring.

The utility model has the advantages that: the utility model inserts the ignition end of the ignition mechanism into the bottom of the transparent bottle body through the jack, and the hydrogen is introduced into the transparent bottle body through the hydrogen supply component, so that the mixed gas of the hydrogen and the air is formed in the transparent bottle body, when the ignition end of the ignition mechanism emits electric spark, the mixed gas of the hydrogen and the air in the transparent bottle body is ignited, the detonation occurs, students can obviously feel the detonation phenomenon from the senses such as vision and hearing, the problem of unobvious phenomenon when testing the combustion of the impure hydrogen in a chemical textbook is solved, the classroom teaching interest is increased, the experimental safety consciousness of the students is also improved, the utility model discloses collect the impure hydrogen, ignite the mixed gas of the hydrogen and the air to generate huge explosion sound, the explosion can be generated when not only verifying to ignite the impure hydrogen, but also give the students a deep classroom teaching impression, arouse the attention to the use of combustible gases such as hydrogen, the security of dust, also increased the student to chemical study interest simultaneously, activated classroom teaching atmosphere. Wherein, in order to improve the experimental security, and the simplicity and the practicality of operation, make the utility model discloses easily realize, ignition mechanism is electronic ignition ware, electronic ignition ware's discharge end passes through the wire, in introducing the transparent bottle with the electric spark, make the internal mixed gas that gets hydrogen and air of transparent bottle can be lighted, use the alcohol burner to light gas in having stopped traditional experimental means, the potential safety hazard brought, make the operation more simple and convenient simultaneously, and the energy saving, in order to prevent that the internal mixed gas that gets hydrogen and air of transparent bottle is excessive, influence experimental safety, be provided with the sealing washer on the jack of transparent bottle, the downthehole ignition end that inserts ignition mechanism in the centre bore of sealing washer.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic structural view of embodiment 1.

FIG. 3 is a schematic structural view of embodiment 2.

Detailed Description

Example 1

As shown in fig. 1 and 2, the teaching device for the mixed gas explosion experiment of hydrogen and air comprises a transparent bottle body 1 and an ignition mechanism, wherein a jack is arranged at the bottom of the transparent bottle body 1, an ignition end of the ignition mechanism is inserted into the transparent bottle body 1 through the jack, a hydrogen gas supply assembly is arranged in a bottle mouth of the transparent bottle body 1, the ignition mechanism is an electronic igniter 3, a discharge end of the electronic igniter 3 is connected with a lead 2, the tail end of the lead 2 is inserted into the jack and used for igniting the mixed gas of hydrogen and air in the transparent bottle body 1, a sealing ring is arranged on the jack, and the ignition end of the ignition mechanism is inserted into a central hole of the sealing ring.

The utility model discloses at first carry out the preparation of device, in order to make the operator can easily take up transparent bottle 1, and in the experimentation, can not go on because the weight influence experiment of transparent bottle 1, consider the safety factor simultaneously, transparent bottle 1 adopts the plastic bottle, the volume of plastic bottle is 110 ml's plastic bottle without lid (the body is cylinder or cuboid all can, the too big plastic bottle explosive power of volume is too big, the use is not advised), a common lighter (no fuel), two length is 50-70 centimetres wire 2, a length is less than the infusion hose of wire 2, double faced adhesive tape, transparent adhesive tape, paraffin or 502 glue, vaseline, prick the jack that two wires can pass at the plastic bottle bottom, take off electronic igniter 3 from the lighter, empty dozen times, whether inspection electronic igniter 3 can produce the electric spark, stripping 1 cm of an insulating layer at the foremost end of a positive wire of an electronic igniter 3, stripping 1 cm of an insulating layer at one end of a prepared wire 2, connecting exposed metal wires of the two wires, and tightly wrapping an interface by using a colloid of a double-sided adhesive tape to prevent electric leakage; taking another prepared wire 2, peeling off an insulating layer of 3 cm at one end, winding the exposed metal wire on a metal cap at the lower end of an electronic igniter 3, tightly winding and wrapping the metal cap by using a colloid part of a double-sided adhesive tape, putting the electronic igniter 3 connected with the wire 2 in the original position (in an igniter box) of the lighter, idle striking for several times to ensure that the electronic igniter 3 can be freely pressed and bounced, reassembling all parts of the lighter, finally leading the two wires 2 out of a round hole of a metal fan cover, shearing the other ends of the two wires 2 (preferably polishing the other ends by using abrasive paper to straighten the exposed metal wire), peeling off the insulating layer of 0.5 cm long at the same time, winding the two wires 2 together, keeping the distance of the metal wires and preventing the wires from being wound and leaking electricity by using a prepared infusion hose to sleeve the two wires 2, the conducting wire is 3 cm longer than the infusion hose, so that the longer part can not be sheathed, a proper amount of vaseline is smeared on the exposed metal wire of the conducting wire 2 to prevent water drops from being stuck on the metal wire and generating no spark when the metal wire is ignited, the conducting wire 2 which is not sheathed on the infusion hose is extended into the bottle through the jack at the bottom of the plastic bottle, the distance between the two metal wires of the conducting wire 2 is adjusted by tweezers at the bottle opening, the igniter is pressed to normally ignite the conducting wire (whether the spark is generated at the front end of the thin conducting wire in the bottle in a dark place is observed), the jack at the bottom of the bottle is sealed by paraffin liquid or 502 glue, or a sealing ring is directly arranged on the jack to ensure that the air is not leaked, and then the two ends of the conducting wire 2 which is sheathed with the infusion hose are respectively fixed on the plastic bottle body and the shell of the igniter by using transparent adhesive.

Before the experiment is started, firstly, the mouth of a plastic bottle is downward, the plastic bottle is held by hand or placed on an iron clamp of an iron stand, one end of a gas transmission pipe 4 is inserted into the mouth of the plastic bottle, the other end of the gas transmission pipe 4 is connected with a hydrogen source, the hydrogen source transmits hydrogen into the plastic bottle through the gas transmission pipe 4, the density of the hydrogen is only 1/14 of air, therefore, the hydrogen is continuously gathered at the bottom of the bottle after entering the plastic bottle, meanwhile, the air at the bottom of the bottle is pushed downward, the method is that the hydrogen is collected by a downward air exhaust method, the capacity of the plastic bottle is known, the amount of hydrogen output by the hydrogen source is also known, therefore, the amount of the hydrogen transmitted into the plastic bottle can be known through a detection instrument carried by the hydrogen source, in order to realize obvious effect and safe experiment, the input hydrogen is less than 50 percent and more than 4 percent, because the hydrogen is less than 4 percent and can not reach the explosion limit of the hydrogen, the explosion phenomenon can not occur, the sound generated by more than 50 percent is too strong, the discomfort is caused to people, the plastic bottle mouth is far away from the guide pipe mouth for collecting the hydrogen before ignition, the bottle mouth is not blocked by tens of thousands of people, and the bottle cap can not be covered, finally, the key of the lighter is pressed, so that the electronic igniter 3 is excited, the tail end of the lead 2 emits electric spark, the mixed gas of the hydrogen and the air in the plastic bottle is ignited, and the detonation occurs.

The utility model discloses utilize plastic bottle, lighter, infusion hose, paraffin etc. in the life can assemble one set of the device, no cost of manufacture, durable, safety, effect are obvious.

Example 2

As shown in figure 3, still using the experimental apparatus in example 1, fill half bottle or less water into the plastic bottle, stand the plastic bottle upside down in the bottom of the water tank 7 filled with water, hold the plastic bottle all the time with one hand, prevent turning over, insert one end of the conduit 6 into the plastic bottle from the bottleneck through the water surface, the other end of the conduit 6 is connected with hydrogen source, the hydrogen source conveys hydrogen into the plastic bottle through the conduit 6, the water in the plastic bottle begins to drain from the bottle to the water tank 7, namely collect hydrogen by drainage method, when the water in the bottle is drained off, stop collecting immediately, remove the water surface of the plastic bottle filled with hydrogen and air mixed gas, the bottleneck is downward, observe whether water drops are adhered to two metal wires in the bottle, if so, the bottle is flicked several times with fingers, make it fall, there will not usually be sand paper because the metal wire is smeared with vaseline, and then use the smooth and flat sand paper, The metal wire is straightened, the plastic bottle is prevented from being stained with water, the plastic bottle is held by the last hand, the igniter of the lighter is pressed by the other hand, a very large explosion sound is heard along with the pressing of fingers, and a flame can be seen to emerge from the bottle mouth when the light is dark.

The embodiment can enable students to really see that the explosion is the mixed gas of hydrogen and air, and solves the problem that the students do not understand which gas components exist in the gas collected in the test tube in the textbook, namely the experiment students in the textbook do not understand that the explosion is the mixed gas of hydrogen and air.

Above-mentioned embodiment utilizes one set of simple structure, easy operation, phenomenon obvious, utilize the self-made hydrogen of discarded object and the mist explosion teaching device of air to accomplish the experiment, arouses student's interest in learning, cultivates student's experiment and explores consciousness, also lets the student realize that the experiment teaching aid derives from the theory and the thought of discarded object reuse of life.

Claims

1. Hydrogen and the mist explosion experiment teaching device of air, its characterized in that: the ignition device comprises a transparent bottle body (1) and an ignition mechanism, wherein an insertion hole is formed in the bottom of the transparent bottle body (1), an ignition end of the ignition mechanism passes through the insertion hole and is inserted into the transparent bottle body (1), and a hydrogen gas supply assembly is arranged in the opening of the transparent bottle body (1).

2. The teaching device for the experiment of the mixed gas explosion of hydrogen and air as claimed in claim 1, wherein: the ignition mechanism is an electronic igniter (3), a lead (2) is connected to the discharging end of the electronic igniter (3), and the tail end of the lead (2) is inserted into the jack and used for igniting the mixed gas of hydrogen and air in the transparent bottle body (1).

3. The teaching device for the experiment of the explosion of the mixed gas of hydrogen and air as claimed in claim 1 or 2, wherein: and a sealing ring is arranged on the jack, and an ignition end of an ignition mechanism is inserted into a central hole of the sealing ring.