CN203013072U

CN203013072U - Air buoyancy demonstrator

Info

Publication number: CN203013072U
Application number: CN 201220615426
Authority: CN
Inventors: 昝满
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-11-20
Filing date: 2012-11-20
Publication date: 2013-06-19
Anticipated expiration: 2022-11-20

Abstract

The utility model discloses an air buoyancy demonstrator. The air buoyancy demonstrator is characterized in that a transparent closed container which is fixed on a base is arranged; an air inlet and outlet conduit is arranged at the lower end of the closed container; a seal plug is added at the air inlet and outlet conduit; a fixed pulley is arranged in the closed container; a small ball and an iron weight are fixedly hung on the fixed pulley through light connecting lines; the closed container is sealed through an upper end cover; and the lower end of the closed container is sealed through a corresponding lower end cover. According to the utility model, the air buoyancy demonstrator is improved and provided; when air inflating is carried out through the air inlet and outlet conduit, the pressure of the air in the closed container increases, and the density becomes large; the buoyancy acting on the small ball increases until the buoyancy difference between the buoyancy acting on the small ball and the iron counterweight exceeds the gravity of the small ball and the resistance of a balance system, and the small ball begins to float upward; when air extracting is carried out, the pressure of the air in the closed container reduces, and the density becomes small; the buoyancy reduces, and the small ball begins to sink; by using the device, a teacher can conveniently carry out demonstration in a gas buoyancy teaching process; and the air buoyancy demonstrator has a good popularization value.

Description

The aerostatic buoyancy demonstration device

Technical field

The utility model relates to a kind of teaching demonstration equipment, is specifically a kind of aerostatic buoyancy demonstration device.

Background technology

As everyone knows, no matter for junior middle school or senior middle school, physics lesson is all a very important subject, yet in physical teaching course, discovery is at the device that buoyancy when demonstration explanation is not had at present can demonstrate buoyant gas, and the student understands this and more or less has certain difficulty, and therefore teaching gets up to exist certain difficulty, therefore the utility model provides a kind of aerostatic buoyancy demonstration device, be used for addressing this problem.

The utility model content

The purpose of this utility model is to provide a kind of aerostatic buoyancy demonstration device simple in structure at this, and auxiliary teacher is to demonstrating buoyant gas in teaching process.

The utility model is achieved in that a kind of aerostatic buoyancy demonstration device of structure, it is characterized in that: be provided with a transparent closed container that is fixed on base, closed container is connected to the turnover airway, turnover airway place also has additional sealing-plug, be provided with a fixed pulley in closed container, fixedly be hung with bead and irony weight by the lightweight line on fixed pulley, seal by upper end cover on closed container, the closed container lower end is by corresponding bottom end cover sealing.Object is placed in a closed container, and atmospheric density changes, and object just can move up and down, and proves aerostatic buoyancy with this.

According to a kind of aerostatic buoyancy demonstration device described in the utility model, it is characterized in that: described closed container is the transparent organic glass pipe of high 1 meter, described upper end cover is fixed on the upper end sealing of closed container upper end formation closed container by fastening bolt, and also be provided with O-ring seal in closed container upper end sealing place, described turnover airway is round tube or square turnover tracheae.

According to a kind of aerostatic buoyancy demonstration device described in the utility model, it is characterized in that: the turnover airway is from closed container lower end side access, and has additional sealing-plug at turnover airway place.

The utility model has the advantage of: the utility model provides a kind of aerostatic buoyancy demonstration device by improvement, when inflating by the turnover airway, air pressure in closed container increases, it is large that density becomes, the buoyancy that bead is subject to increases, when being enough to overcome the resistance of bead gravity and balanced system with the buoyancy of irony counterweight is poor, bead begins to float when large; When bleeding, the air pressure in closed container reduces, and density diminishes, and buoyancy reduces, and bead begins to sink, and therefore utilizes this dress can be convenient to teacher in the buoyant gas teaching process, it being demonstrated, and has good promotional value.

Description of drawings

Fig. 1 is that the utility model is implemented structural representation;

Wherein: 101, bead, 102, the irony weight, 103, upper end cover, 104, pulley, 105, the lightweight line, 106, closed container, 107, base, 108, sponge, 109, sealing-plug, 110, turnover airway, 111, fastening bolt, 112, O-ring seal, 113, bottom end cover.

Embodiment

Be elaborated below in conjunction with 1 pair of the utility model of accompanying drawing, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.

The utility model provides a kind of aerostatic buoyancy demonstration device, be provided with a transparent closed container 106 that is fixed on base 107, closed container 106 is connected to turnover airway 110, turnover airway 110 places also have additional sealing-plug 109, be provided with a fixed pulley 104 in closed container 106, fixedly be hung with bead 101 and irony weight 102 by lightweight line 105 on fixed pulley 104, on closed container 106, by upper end cover 103 sealing, closed container 106 lower ends are by 113 sealings of corresponding bottom end cover.Can adopt the transparent organic glass pipe to make the closed container 106 of high 1 meter in the utility model, it is high 1 meter to be that closed container 106 is made, highly reasonable, be fit to the demonstration operation, described upper end cover 103 is fixed on the upper end sealing of closed container 106 upper ends formation closed containers 106 by fastening bolt 111, and also be provided with O-ring seal 112 in closed container 106 upper end sealings place, described turnover airway 110 is round tube or square turnover tracheae.Turnover airway 110 is from closed container 106 lower end side accesses, and has additional sealing-plug 109 at turnover airway 110 places.When inflating, the air pressure in closed container 106 increases by turnover airway 110, and it is large that density becomes, and the buoyancy that bead 101 is subject to increases, and when being enough to overcome the resistance of bead gravity and balanced system with the buoyancy of irony counterweight 102 is poor, bead begins to float when large.When bleeding, the air pressure in closed container reduces, and density diminishes, and buoyancy reduces, and bead begins to sink.When bead is in atmospheric pressure state, affect the irony mass with magnet, bead can be parked in any height, can be considered as suspending.

Above-mentioned explanation makes this area professional and technical personnel can realize or use the utility model.Therefore, the utility model will can not be restricted to shown in this article these and implement, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims

1. aerostatic buoyancy demonstration device, it is characterized in that: be provided with a transparent closed container (106) that is fixed on base (107), closed container (106) is connected to turnover airway (110), be provided with a fixed pulley (104) in described closed container (106), described fixed pulley (104) is upper fixedly is hung with bead (101) and irony weight (102) by lightweight line (105), described closed container (106) upper end is by upper end cover (103) sealing, and closed container (106) lower end is by corresponding bottom end cover (113) sealing.

2. a kind of aerostatic buoyancy demonstration device according to claim 1, it is characterized in that: described closed container (106) is the transparent organic glass pipe of high 1 meter, described upper end cover (103) is fixed on the upper end sealing of closed container (106) upper end formation closed container (106) by fastening bolt (111), and also be provided with O-ring seal (112) in closed container (106) upper end sealing place, described turnover airway (110) is round tube or square turnover tracheae.

3. a kind of aerostatic buoyancy demonstration device according to claim 1, is characterized in that: pass in and out airway (110) from the access of closed container (106) lower end side, and locate to have additional sealing-plug (109) at turnover airway (110).