CN208985479U - A kind of Middle School Physics buoyancy study experimental facilities - Google Patents

Abstract

A kind of Middle School Physics buoyancy study experimental facilities, design a kind of experimental provision, opening is equipped on the cylinder lateral wall, several plugboards with the opening two inner sidewalls interference fit are equipped in the opening on the cylinder lateral wall, dismountable closed-entry is equipped on the outside of several plugboards to let slip a remark, and is equipped with bottom accommodating groove in the cylinder lower part, the cylinder top is equipped with bracket, weight beam has been hung up on the bracket, is equipped with tightening noose in the weight beam lower part；Pass through the utility model, buoyancy rule in a manner of Multicarity comparative experiments under the displaying different situations of image, with very strong comparative and intuitive, it can deepen understanding of the student to buoyancy knowledge by comparative experiments, improve student's operating ability and students ' interest of study, compared to traditional buoyancy experiment equipment, the utility model improves the accuracy of experimental data measurement and the convenience of operation using wooden cask type container.

Description

A kind of Middle School Physics buoyancy study experimental facilities

Technical field

The utility model relates to a kind of experimental facilities, learn experimental facilities more particularly, to a kind of Middle School Physics buoyancy.

Background technique

Physics is a theoretical property and the very strong subject of practicality, for most of students, learns physics well very not Be easy, but for the psychological characteristics of student and cognitive law, their learning activities is easiest to from interest, be easiest to by Interest or so.Studies have shown that people are when facing oneself interested things, memory effect is obviously improved.In Physics Learning, very More laws all be unable to do without experimental demonstration, in experimental demonstration, student are allowed to do it yourself to complete experiment, verified each in Physics Learning Law, during starting experiment, the interest with Physics Learning peomotes student and learns object positively Reason, and then teaching efficiency is promoted, so that physics teaching achievees the effect that get twice the result with half the effort.

The law of buoyancy of object, also known as Archimedes' principle are a very important laws physically.Physics In habit, the reason of buoyancy phenomenon is the key content in Physics Course, and solution generates buoyancy and the factor of buoyancy is influenced always It is the difficult point of teaching.According to the formula of the law of buoyancy, the buoyancy size of object can be obtained by formula It is related with the volume that the density of solution and object arrange solution, and with the quality of object, volume, gravity, shape, the depth of submergence Deng unrelated.Although theoretical knowledge is simple, but usually make student dizzy based on the related topic that this theoretical basis is derived Head turns to, such as common some buoyancy topics: the identical three bead baton rounds of volume, iron ball, wooden shot immerse in water, to After they are static, who is big for buoyancy that they are subject to, and the identical iron ball of two volumes is individually positioned in water and mercury, and what is be subject to is floating Who is big for power, and copper identical in quality, three blocks of iron, aluminium metals, the buoyancy size relation being subject to after putting into mercury is what, etc. etc. Deng, buoyancy knowledge just seems ever-changing, hard to understand at this time, and teacher gives lectures, student also understand it is laborious, for each feelings The most intuitive learning method of buoyancy phenomenon under shape is exactly experimental verification, however there are no will be specifically real in present physical teaching Border example, which is placed on, deepens the instructional device that student understands buoyancy phenomenon on classroom, first is that without respective needle to various buoyancy situations Buoyancy experiment device, second is that teacher or student because cumbersome abandon Experimental Research, cause buoyancy study that can only rest on On textbook, can not concrete operations, cause efficiency of teaching low or even some students be by the way of memorize mechanicalling, student for The understanding of the law of buoyancy is not deep enough, will result in thinking mistake of solving a problem, causes the phenomenon that losing scores, and student can not get a real idea of floating Theory can not be applied to and actually solve a problem with experimental design, very big influence is caused to Physics Learning effect by force phenomenon.

The experimental provision for studying buoyancy phenomenon in physics at present is fairly simple, operates more troublesome, visual bad, experiment Device can only demonstrate a kind of buoyancy effect of object, demonstrate other buoyancy of object states if necessary, then need to carry out anti- Multiple operation carries out by several times, wastes experimental period, and not intuitive obvious enough for the demonstrating effect of physics floating force phenomenon, for The teaching efficiency for promoting physics floating force experimental phenomena is unobvious, demonstrates result to the impressionable quarter of student, for improving physics Learning effect helps little.Currently, there is also some problems in the experiment of physics floating force phenomenon demonstration, it is as follows:

1, apparatus used in the experimentation of traditional physics floating force phenomenon specifically includes that various mass, spring are surveyed Power meter, beaker, balance etc., experimental apparatus is more trifling, and the scattered placement of experimental apparatus, no integral type, integration are put The buoyancy experiment device set, experimental demonstration equipment are looked for, manage and carry very inconvenient；

2, traditional physics floating force experiment experiment equipment used is relatively simple, is unable to satisfy buoyancy experiment under various situations Demonstration, such as judgement and demonstration of the quality different objects floating state by buoyancy size, isometric different objects floating state By buoyancy size judgement and demonstration, etc. quality different objects sink to liquid condition by the judgement of buoyancy size and demonstration with And isometric different objects sink to judgement and demonstration of the liquid condition by buoyancy size, student can not float downward for different situations Force phenomenon is learnt comprehensively, and experiment method is relatively simple, the understanding buoyancy knowledge that student can not be comprehensive, deep.

3, the apparatus for demonstrating of the current buoyancy of object phenomenon used can only realize independent a type of weight in solution In buoyancy demonstration, for demonstration different objects, the demonstration of buoyancy size and same object suffered by floating body be not in solution In buoyancy experiment under same volume, need constantly to replace weight type, it is troublesome in poeration, it cannot carry out simultaneously, it cannot be flexible Different types of buoyancy phenomenon synchronization, comparative experiments demonstration are carried out, therefore experiment cannot be contrasted, student can not pass through comparison Visual learning buoyancy knowledge is tested, causes student that flexibly deep understanding and Archimedes' principle cannot be grasped, physics is caused to be taught It is poor to learn effect.

4, the experiment appliances such as currently used graduated cylinder or beaker are very inconvenient for the measurement for arranging liquid volume, universal at present There are two types of by the way of:

(1) first is that on observation graduated cylinder or beaker liquid level position scale variation calculate the volume for arranging liquid, but buoyancy In presentation process, the bad control of liquid level of solution consistent level needs that liquid surface static is waited more could accurately to measure, so that experiment Process slows down, and wastes time, and fluid change amplitude be easy it is smaller be unfavorable for reading, fluid change amplitude is excessive to be easy to spill Leakage, and be also easy to generate larger experimental bias because experimenter reads posture problem when reading, it is easy to cause experimental data not Accurately, and then the experimental result that experimental result even demonstration obtains the mistake of mistake is influenced, brings misleading to student, is unfavorable for floating Power knowledge learning；And amplitude of variation is unfavorable for the progress of floating power experimental demonstration；

(2) second is that beaker bottom side pad is put an object block, so that beaker tilts, keg is placed below beaker mouth, Mass falls into the solution overflowed in solution processes and flows into keg when to realize buoyancy demonstration, however this experiment method is deposited In inconvenience: first, need to guarantee that liquid level maintains an equal level just at at beaker mouth when beaker slant setting, solution cannot be below At beaker mouth, this just has strict requirements to the height of cushion block, placement location, so that experimental implementation is more difficult, student is not Good control；Second, beaker slant setting, bottom cushion block is unstable, easily shakes, and causes beaker to slide so that experiment can not It carries out；Third, graduated cylinder should be attached to beaker side wall, the unstable easy dislocation of beaker stress and sliding, cause in solution overflow process Leakage is easily spilt, leads to experiment measurement inaccuracy, influences to test accuracy；

5, when using weight beam, usually teacher or student hold weight beam, in measurement process, spring Dynamometer is not capable of fixing, the height that can not accurately control the mass of weight beam lower part hanging by lifting weight beam Position, hand long-time, which lifts, is easy fatigue, and hand-held weight beam will also result in reading inconvenience, is easy to produce reading and misses Difference influences to test accuracy；

6, in carrying out buoyancy phenomenon when buoyancy suffered by object experimental verification related with the volume that object arranges solution, The solution needs of buoyancy discharge are specially held into individual container, such operation is very inconvenient, is easy to spill solution When leaking, and needing to carry out buoyancy experiment again, due to spilling leakage, make-up solution again is generally required, experimental procedure and reality are increased Duration is tested, efficiency of teaching is reduced；

It 7, is all to be resuspended mass binding below weight beam using filament in traditional buoyancy experimental apparatus, so And use filament binding mass comparatively laborious, if filament binding wound around coil is very few, mass is easy to fall, and filament bundled Multioperation is cumbersome and wastes experimental period, and is easy to produce fast knot using filament binding, and it is very inconvenient to operate.

To sum up, currently, in the teaching demonstration of physics floating force phenomenon, the teaching efficiency of the lecture experiment of physics floating force phenomenon Bad, and experimental apparatus is relatively simple, effect is bad, and student can not get a real idea of buoyancy phenomenon, there is also problems with To be solved, therefore, a kind of integration in short supply, integral type physics floating force experimental demonstration device such as realize at the floating of quality different objects State by the judgement and demonstration of buoyancy size, isometric different objects floating state by buoyancy size judgement and demonstration, Etc. quality different objects sink to judgement and demonstration and isometric different objects of the liquid condition by buoyancy size and sink to liquid The buoyant state that comprehensive object is subject under the different situations such as judgement and demonstration of the state by buoyancy size compares apparatus for demonstrating, Therefore, it is necessary to propose a kind of experimental provision of physics floating force phenomenon, solve the above problems, there is great teaching significance and makes With value.

Summary of the invention

In order to overcome the shortcomings in the background art, the utility model discloses a kind of study experiments of Middle School Physics buoyancy to set Standby, the buoyancy rule in a manner of Multicarity comparative experiments under the displaying different situations of image has very strong comparative and straight The property seen can deepen understanding of the student to buoyancy knowledge by comparative experiments, improve student's operating ability and student's study Interest, compared to traditional buoyancy experiment equipment, the utility model improves the standard of experimental data measurement using wooden cask type container The convenience of true property and operation can simply and effectively carry out the religion of demonstration in all directions of physics floating force experiment by the utility model It learns, the teaching of only teacher is not provided convenience, and improves quality of instruction, and learn buoyancy for student and carry out clearly directly Teaching demonstration, for improve physics student learning interest and student start experimental ability and quality of instruction raising have it is very big Positive benefit.

The technical scheme for implementing the utility model is as follows:

A kind of Middle School Physics buoyancy study experimental facilities, including cylinder, bracket and weight beam, on the outside of the cylinder Wall two sides are respectively equipped with corresponding opening, and several and described two inside of opening is equipped in the opening on the cylinder lateral wall The plugboard of wall interference fit, is equipped with dismountable closed-entry on the outside of several plugboards and lets slip a remark, under the cylinder Portion is equipped with bottom accommodating groove, and the cylinder top is equipped with bracket, weight beam has been hung up on the bracket, in the spring Dynamometer lower part is equipped with tightening noose.

The Middle School Physics buoyancy learns experimental facilities, and the partition of two right-angled intersections is equipped in the cylinder, described The inner barrel is divided into several solution cavities by the partition of two right-angled intersections, on the intracorporal several solution cavity outer walls of the cylinder It is equipped with opening, the plugboard of several piece and the opening interference fit is equipped with over said opening, in two right-angled intersection Be equipped with jack in the middle part of partition, be plugged with hanging rack in the jack, the hanging rack lower part hung up with it is described several molten The corresponding weight beam of sap cavity.

The Middle School Physics buoyancy learns experimental facilities, is equipped with protrusion on two inner walls of the opening on the cylinder Rib is equipped with internal concave hopper chute compatible with the raised rib on two inner walls of the opening on several plugboard two sidewalls, The raised rib on two inner walls of internal concave hopper chute and opening that the plugboard passes through two sides carries out clearance fit.

The beneficial effects of the utility model are: a kind of Middle School Physics buoyancy described in the utility model learns experimental facilities, Buoyancy rule in a manner of Multicarity comparative experiments under the displaying different situations of image, has very strong comparative and intuitive Property, understanding of the student to buoyancy knowledge can be deepened by comparative experiments, student's operating ability is improved and student's study is emerging Interest, compared to traditional buoyancy experiment equipment, the utility model improves the accurate of experimental data measurement using wooden cask type container The convenience of property and operation, the utility model show physical theory knowledge hard to understand in a manner of full-scale investigation, Deepen student memory and understanding significantly, for improving physics student learning interest and student starts experimental ability and quality of instruction Raising there is great positive benefit.

By setting cross bar, pull interior bar, strut and bottom plate, it can be achieved that the fixed support of weight beam, spring magnetic force The support of meter, during making the buoyancy suffered by object weight itself and object, the reading of weight beam is more accurate, avoids hand Mention weight beam survey can because caused by the reasons such as hand shake weight beam reading there is error；

Plugboard and raised rib are set by the barrel outer surface in experiment, are plugged on raised rib by changing plugboard Matching makes a part of cylinder short slab described in notch, that is, Bucket Principle occur, goes out to overflow from plugboard convenient for liquid It also ensures that remaining liq is in more stable state in cylinder, is read convenient for weight beam while out, reduces Influence of the error in reading to the experimental demonstration of physics floating force law, when tradition is tested using beaker, it is also necessary in bottom of the beaker Other objects are padded in portion, and in order to the spilling of solution in beaker, this operation format is excessively cumbersome, and bad operation is unfavorable for physics The progress of buoyancy experiment, while student can also be allowed to learn and understand Bucket Principle, increase the interest of experiment, helps In the teaching efficiency for promoting physics floating force.

By putting slot, it can be achieved that the fixing card of cylinder is put in the upper surface of bottom plate setting card, makes entirely to test and carry out, cylinder Body and the liquid of inner barrel remain more stable state, are conducive to the progress of buoyancy experiment and the survey of experimental data It is fixed, avoid testing in traditional buoyancy beaker bottom needed to place cushion block, make during liquid overflows in beaker, beaker be easy because Cushion block is unstable, causes beaker to topple over, solution is spilt so that testing the case where can not continuing.

By setting inserted link and expanding card slot, it can be achieved that fixation between cylinder and bottom accommodating groove, convenient for picking up object Solution is arranged, prevents liquid from spilling；It is let slip a remark by setting arcuate slot and the closed-entry matched with it, can be convenient for carrying out When buoyancy experiment, when object is immersed cylinder, closed-entry is let slip a remark convenient for the spilling of solution in cylinder, is avoided solution from spilling leakage, is caused Experimental error, while when testing again, addition solution is not needed, the demonstration of buoyancy experiment phenomenon can be quickly carried out, increases religion Learn efficiency；

Scale and dark handle are weighed by setting storage box and the setting of storage box surface, can will be let slip a remark by closed-entry excessive Solution out is stored, while can record the volume for arranging solution, and the effect of dark handle is then easy for teacher or student takes Fetching accepting box；

The knot that can be undone by a pull that mass is loaded by tightening noose, collar extension, bungee and noose composition " net bag type ", is adapted to not The mass of same volume size loads and fastening, and mass is directly put by " net bag type " bearing mode simultaneously also avoids tradition floating The inconvenience that power experiment will bundle again when being caused by mass binding using filament and replace mass every time is experimental implementation band It facilitates, improves conventional efficient.

By setting linear type or the partition of " Y " font or " cross " or " * " shape, so that realizing will be in cylinder Part is divided into two chambers, three chambers, four chambers, six chambers, and on partition top, the hanging rack of setting can be with the shape Synchronization Design of cylinder Linear type or " Y " font or " cross " or " * " shape can be realized corresponding with each solution cavity by setting hanging rack The suspension of each weight beam can carry out the buoyancy size measurement of different objects in the same solution simultaneously, and then study object Body the law of buoyancy can carry out multiple experiments simultaneously, comparative obvious, keep student more intuitive to the understanding of buoyancy, be conducive to The teaching efficiency for promoting physics floating force phenomenon avoids individually operated in batches cumbersome of traditional experimental provision.

A kind of Middle School Physics buoyancy of the utility model learns experimental facilities, in the presentation process of physics floating force phenomenon, Can verify: etc. the different objects of quality swim in that buoyancy suffered when same solution is equal, with the volume of object itself with Density is unrelated；Isometric different objects when being floated in same solution suffered buoyancy differ in size, and buoyancy size and object Density it is directly proportional；Etc. the different objects of quality when being immersed in same solution the suffered buoyancy of object differ in size, and buoyancy with The density of object is inversely proportional；It is equal in magnitude that isometric different objects are immersed in buoyancy suffered when same solution, at this time buoyancy Size equal buoyancy rule unrelated with density with the quality of object itself, the buoyancy situation for the abstract that student is encountered in exercise It is shown with physical form, student is allowed to start to test, buoyancy rule is probed into a manner of practice, not only improved student and start to grasp Make ability, and increase the interest of study, students ' interest of study is improved, by theoretical knowledge hard to understand with full-scale investigation Mode is shown, significantly intensification student memory and understanding, starts to test energy for improving physics student learning interest and student The raising of power and quality of instruction has great positive benefit.

Detailed description of the invention

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 is the structural schematic diagram of the utility model.

Fig. 2 is the tube structure schematic diagram of the utility model.

Fig. 3 is the stirring superstructure schematic diagram of the utility model.

Fig. 4 is the plugboard structural schematic diagram of the utility model.

Fig. 5 is the bottom storage slot structure schematic diagram of the utility model.

Fig. 6 is the tightening sleeve rope structure schematic diagram of the utility model.

Fig. 7 is the multi-cavity tube structure schematic diagram of the utility model.

Fig. 8 is the hanging rack structural schematic diagram of the utility model.

Fig. 9 is the supporting structure schematic diagram of the utility model.

In figure: 1. cross bars, 2. hooks, 3. weight beams, 4. pull interior bars, 5. tightening nooses, 6. push type card beads, 7. Strut, 8. cylinders, 9. scales, 10. openings, 11. plugboards, 12. bottom accommodating grooves, 13. bottom plates, 14. raised ribs, 15. neckings Formula is let slip a remark, 16. arcuate slots, 17. grooves, 18. storage boxes, 19. mass experimental groups, and 20. weigh scale, 21. arc grafting Head, 22. internal concave hopper chutes, 23. expanding card slots, 24. perforation, 25. dark handles, 26. expanding baffles, 27. inserted links, 28. lanyards, 29. Bungee, 30. nooses, 31. hanging racks, 32. hang up bar, 33. support rods, 34. partitions, 35. solution cavities, 36. jacks, and 37. turns Axis, 38. straight-bars, 39. card interfaces, 40. limit holes, 41. cards put slot, 42. connection-pegs.

Specific embodiment

The utility model is described in further detail presently in connection with attached drawing.These attached drawings are simplified schematic diagram, Only illustrate the basic structure of the utility model in a schematic way, therefore it only shows composition related with the utility model.

The Middle School Physics buoyancy in conjunction with given by attached drawing 1~9 learns experimental facilities, is equipped on 8 lateral wall of cylinder Opening 10 is equipped with inserting for 10 liang of inner sidewalls interference fits of the several and described opening in the opening 10 on 8 lateral wall of cylinder Fishplate bar 11 is equipped with raised rib 14 on two inner walls of the opening 10 on the cylinder 8, in several 11 two sidewalls of plugboard On be equipped with and pass through two sides with the compatible internal concave hopper chute 22 of raised rib 14 on 10 liang of inner walls of the opening, the plugboard 11 Internal concave hopper chute 22 and opening 10 liang of inner walls on raised rib 14 carry out clearance fit, be all provided on the outside of several plugboards 11 There is dismountable closed-entry to let slip a remark 15, arcuate slot 16 is equipped on several 11 outer surface tops of plugboard, in the contracting Mouthful formula lets slip a remark 15 tail portions equipped with arc connection-peg 21 compatible with the arcuate slot 16, and the closed-entry, which is let slip a remark, 15 passes through tail The arc connection-peg 21 in portion carried out with the arcuate slot 16 on 11 outer surface of plugboard it is mating, further, described each A closed-entry let slip a remark 15 outsides 8 outer wall of cylinder on be equipped with graduation mark, to carry out the label of liquor capacity in cylinder 8, 8 lower part of cylinder is equipped with bottom accommodating groove 12, inserted link 27 is equipped in 8 lower part of cylinder, in the bottom accommodating groove 12 Portion is equipped with perforation 24 compatible with the inserted link 27 of 8 lower part of cylinder, 24 bottom of perforation on the bottom accommodating groove 12 Equipped with expanding card slot 23, the bottom accommodating groove 12 is plugged on 27 top of inserted link of 8 lower part of cylinder by perforation 24, inserts described 27 lower part of bar is equipped with expanding baffle 26 compatible with the expanding card slot 23 of 24 bottoms of perforating on the bottom accommodating groove 12, described Bottom accommodating groove 12 passes through 26 block of expanding baffle of 27 bottom of inserted link on inserted link 27, in 12 lateral surface of bottom accommodating groove Several grooves 17 are equipped with, storage box 18 is equipped in several grooves 17, is set respectively in appearance in the storage box 18 There is dark handle 25 and weigh scale 20, dress is placed with mass experimental group 19, the mass experiment in the storage box 18 Group 19 includes the wooden unit and wax stone, the wooden unit of same volume and wax stone, the iron block of phase homogenous quantities and copper billet and identical of phase homogenous quantities The iron block and copper billet of volume, 8 top of cylinder are equipped with bracket, weight beam 3 have been hung up on the bracket, in the bullet 3 lower part of spring dynamometer is equipped with tightening noose 5, and the tightening noose 5 is made of bungee 29 and several nooses 30, in the pine One end of tight rope 29 is equipped with collar extension 28, and the collar extension 28 that the other end of the bungee 29 passes through 29 one end of bungee forms annular pine Tight mouth, the other end that the bungee 29 is pierced by collar extension 28 are articulated on weight beam 3, in the annular elastic opening of the formation 29 lower part of bungee is equipped with several nooses 30, the both ends of several nooses 30 bungee 29 with the annular elastic opening respectively Two sides are fixed, and several nooses 30 " cross " intersection or " * " shape can intersect respectively as needed, and the bracket is by cross Bar 1, pull interior bar 4, strut 7 and bottom plate 13 form, and are equipped in 13 upper surface middle part of bottom plate compatible with the cylinder 8 Card puts slot 42, and the card on 13 upper surface of bottom plate puts 17 two sides of slot and is respectively equipped with connection-peg 43, and the strut 7 passes through grafting First 43 grafting card is put on base 13, the pull interior bar 4 with 7 clearance fit of strut is equipped in two strut 7, in institute Pull interior bar 4 is stated equipped with push type card bead 6, several push type cards in the pull interior bar 4 are equipped on the strut 7 The compatible limit hole 40 of pearl 6 is equipped with cross bar 1 on two pulls interior bar, 4 top, hook 2 is equipped on the cross bar 1, Weight beam 3 has been hung up on the hook 2；

Further, it is shown for the ease of carrying out the comparison of buoyancy experiment, partition 34 is equipped in the cylinder 8, it is described Partition 34 may be designed as linear type or " Y " font or " cross " or " * " font, to realize 8 inner part of cylinder Two chambers, three chambers, four chambers, six chambers are divided into, Fig. 7 gives the embodiment of " cross " partition 34, can design according to actual needs Different 34 patterns of partition, so that the cylinder 8 for obtaining different cavity number compares experiment, it should be noted that each solution cavity 35 Be equipped with opening 10 on outer wall, the number according to setting solution cavity 35 is different, design different opening numbers so that opening 10 with it is molten The number of sap cavity 35 is corresponding, the plugboard 11 of 10 interference fit of several piece and the opening is equipped in the opening 10, in institute It states and is equipped with jack 36 in the middle part of partition 30, hanging rack 31 is plugged in the jack 36, the hanging rack 31 is by several straight-bars 38, shaft 37 and support rod 33 form, and several straight-bars 38 are put to be formed according to solution cavity 35 number superpositions in cylinder 8 Linear type or " Y " font or " cross " or " * " shape, several 38 middle parts of straight-bar are flexibly connected by shaft 37, in institute It states several 38 both ends of straight-bar and is equipped with and hang up bar 32, the weight beam 3 is hung up by hanging up bar 32 at 38 liang of several straight-bars End is equipped with card interface 39 in 37 lower part of shaft, and the support rod 33 carries out several straight-bars 38 by card interface 39 Fixed support has hung up weight beam 3 corresponding with the several solution cavities 35 in 31 lower part of hanging rack；Further , for the ease of carrying, storage carrying can be carried out to the utility model by hand basket, box body.

Implement Middle School Physics buoyancy study experimental facilities described in the utility model is when carrying out physics floating force study The understanding buoyancy of object relevant knowledge that enables student deep, teacher can be carried out the relevant experiment of buoyancy by the present apparatus and drilled Teaching, student can start to demonstrate the buoyant state under different situations by the present apparatus, when carrying out physics floating force Preparatory work of experiment, Teacher will first contain in cylinder 8 into clear water, then the card that the cylinder 8 for filling clear water card is placed on bracket inner bottom plating 13 is put in slot 42, and The connection-peg 43 of two struts, 7 tail end grafting on base 13 is fixed, before carrying out physics floating force experiment, in order to cylinder Clear water in 8 is quantified, and teacher can extract the storage box 18 on 8 lower base accommodating groove 12 of cylinder out, and is turned to and cylinder The corresponding position of opening 10 on body 8, by closed-entry let slip a remark 15 be plugged on opening 10 on second piece of plugboard 11 outside, pull out First piece of plugboard 11 in opening 10 out, using Bucket Principle, the clear water in cylinder 8 can be from first piece for extracting on 10 that be open It is flowed out at plugboard 11, and is let slip a remark using the closed-entry on second piece of 11 mountain of plugboard and 15 the clear water of outflow is flowed into lower container box 18 are collected, when in cylinder 8 horizontal plane of clear water with opening 10 at second piece of plugboard 11 on along it is parallel when, clear water stop Flow out and carry out quantitative holding, the scale on second piece of plugboard 11 on the cylinder 8 of side, which can understand, directly reads cylinder 8 The volume of interior clear water, to realize the control to clear water volume in cylinder 8；

In order to which the apparent direct comparative experiments for carrying out mass experimental group 19 shows that teacher is inserted into cylinder 8 "-" type partition 34, realization are separated to form two cavitys to cylinder 8, facilitate the comparative experiments for carrying out mass experimental group 19,

When carrying out buoyancy of object measurement, teacher can be by mass via the ring that be formed of bungee 29 on tightening noose 5 Shape elastic opening is put into, and can realize that carrying out set to each side of mass puts, and matches by several nooses 30 of 29 lower part of bungee Weight passes through the outer end of lifting bungee 29 after being put into, bungee 29 is slided via collar extension 28 and received to annular elastic opening Contracting, to be limited using bungee 29 and several nooses 30 to the binding of mass, mass surrounding is firmly covered by noose 30 Tightly, it avoids mass occurs skidding off and fall, and bungee used, noose are that material is lighter, thinner rope, the weight of rope It is negligible, the tightening noose 5 equipped with mass is hung up in 3 lower part of weight beam, then weight beam 3 is hung up At the hook 2 at 1 middle part of cross bar on bracket, mass is dropped by gravity, can be understood by weight beam 3 and easily be read The gravity of mass out, after the gravity for having recorded mass, press down on cross bar 1 simultaneously limit using push type card bead 6 it is solid Fixed, so that mass moves on the liquid into cylinder 8, and then carries out the demonstration of buoyancy experiment, the utility model experiment is divided into It is several below:

Experiment one:

1, verify content: etc. the different objects of quality to swim in buoyancy suffered when same solution equal, with object sheet The volume of body is unrelated with density.

2, experimental procedure:

Step 1: preparing two wooden units and paraffin mass identical in quality in mass experimental group, uses lanyard, noose and pine respectively Wooden unit or paraffin mass are suspended on weight beam by tight rope, measure G_WoodAnd G_Wax；

Step 2: being pressed down on cross bar 1 and fixed using push type card bead 6, when wooden unit and paraffin mass float On liquid level, after liquid level stabilizing, the reading for observing weight beam is respectively F₁And F₂, F₁And F₂It is 0, according to measurement The gravity G of wooden unit and paraffin mass_WoodAnd G_WaxAnd paraffin mass and wooden unit be when swimming on solution, the reading F of weight beam₁With F₂, solution buoyancy F suffered by wooden unit can be calculated_WoodWith buoyancy F suffered by paraffin mass_Wax, F_Wood=F_Wax=G_Wood=G_Wax；

Step 3: with moving down for mass, as mass contacts solution and submerges in the solution, according to wooden barrel original Reason, solution water level rise and from second piece of plugboard 11 in 8 upper opening 10 of cylinder along outflow, solution after outflow again via Closed-entry is let slip a remark and is collected in 15 inflow storage boxes 18, the volume of the spillage solution of measurement storage box storage and known molten Liquid density leads to buoyancy formula, solution buoyancy F suffered by wooden unit can be calculated_WoodWith buoyancy suffered by paraffin mass F_Wax, calculated result is consistent with step 2 acquired results.

3, experiment conclusion: can be obtained by the verifying of experiment one: etc. the different objects of quality swim in same solution when institute The buoyancy being subject to is equal, unrelated with density with the volume of object itself.

Experiment two:

1, verify content: isometric different objects when being floated in same solution suffered buoyancy differ in size, and buoyancy Size is directly proportional to the density of object.

2, experimental procedure:

Step 1: prepare mass experimental group in the identical wooden unit of two volumes and paraffin mass, respectively with lanyard, noose and Wooden unit or paraffin mass are suspended on weight beam by bungee, measure G_WoodAnd G_Wax, due to ρ_Wood<ρ_Wood, so G_Wood<G_Wax；

Step 2: being pressed down on cross bar 1 and fixed using push type card bead 6, when wooden unit and paraffin mass float On liquid level, after liquid level stabilizing, the reading for observing weight beam is respectively F₁And F₂, F₁And F₂It is 0, according to measurement The gravity G of wooden unit and paraffin mass_WoodAnd G_WaxAnd the reading F of paraffin mass and wooden unit weight beam when swimming on solution₁With F₂, solution buoyancy F suffered by wooden unit can be calculated_WoodWith buoyancy F suffered by paraffin mass_Wax, F_Wood=G_Wood, F_Wax=G_Wax, but F_Wood<F_Wax；

Step 3: according to the volume and known solution density, wooden unit and stone of the spillage solution of measurement storage box storage Wax stone arranges liquor capacity etc., leads to buoyancy formula, solution buoyancy F suffered by wooden unit can be calculated_Wood With buoyancy F suffered by paraffin mass_Wax, calculated result is consistent with step 2 acquired results.

3, experiment conclusion: can verify that through the above steps, and isometric different objects are suffered when floating in same solution Buoyancy differs in size, and buoyancy size is directly proportional to the density of object.

Experiment three:

1, verify content: etc. the different objects of quality when being immersed in same solution the suffered buoyancy of object differ in size, and The density of buoyancy and object is inversely proportional.

2, experimental procedure:

Step 1: preparing two copper billets and iron block identical in quality in mass experimental group, respectively with lanyard, noose and elastic Copper billet and iron block are suspended on weight beam by rope, measure G_IronAnd G_Copper, and G_Iron=G_Copper；

Step 2: it presses down on cross bar 1 and is simultaneously fixed using push type card bead 6, when being suspended in spring dynamometry Copper billet and iron block be immersed in the intracorporal solution of cylinder, after liquid level stabilizing, the reading for observing weight beam is respectively F₁With F₂, according to the gravity G of the copper billet of measurement and iron block_CopperAnd G_IronAnd copper billet and iron block be when being immersed in solution, the reading of weight beam Number F₁And F₂, solution buoyancy F suffered by copper billet can be calculated_Copper=G_Copper-F₁, buoyancy F suffered by iron block_Iron=G_Iron-F₂, but due to ρ_Iron<ρ_Copper, In situation identical in quality, V_Copper<V_Iron, so F_Iron>F_Copper；

Step 3: according to the volume and known solution density, iron block and copper of the spillage solution of measurement storage box storage Block arranges liquor capacity etc., leads to buoyancy formula, solution buoyancy F suffered by copper billet can be calculated_CopperWith Buoyancy F suffered by iron block block_Iron, calculated result is consistent with step 2 acquired results.

3, experiment conclusion: can verify that through the above steps, etc. the different objects of quality object when being immersed in same solution Suffered buoyancy differs in size, and the density of buoyancy and object is inversely proportional.

Experiment four:

1, verify content: it is equal in magnitude that isometric different objects are immersed in buoyancy suffered when same solution, floats at this time Power size and the quality of object itself are unrelated with density.

2, experimental procedure:

Step 1: preparing the identical copper billet of two volumes and iron block in mass experimental group, respectively with lanyard, noose and elastic Copper billet and iron block are suspended on weight beam by rope, measure G_CopperAnd G_Iron, and G_Copper>G_Iron；

Step 2: the copper billet being suspended in spring dynamometry and iron block are immersed in the intracorporal solution of cylinder respectively, to liquid level After stabilization, the reading for observing weight beam is respectively F₁And F₂, according to the gravity G of the copper billet of measurement and iron block_CopperAnd G_IronAnd copper When block and iron block are immersed in solution, the reading F of weight beam₁And F₂, solution buoyancy F suffered by copper billet can be calculated_Copper=G_Copper-F₁, Buoyancy F suffered by iron block_Iron=G_Iron-F₂, but due to V_Iron=V_Copper, so F_Iron=F_Copper；

Step 3: according to the volume and known solution density, iron block and copper of the spillage solution of measurement storage box storage Equal, the i.e. V that arranges liquor capacity of block_Iron=V_Copper, pass through buoyancy formula, can calculate molten suffered by copper billet Liquid buoyancy F_CopperWith buoyancy F suffered by iron block block_IronEqual, calculated result is consistent with step 2 acquired results.

4, experiment conclusion: can verify that through the above steps, and isometric different objects are immersed in suffered when same solution Buoyancy is equal in magnitude, and buoyancy size and the quality of object itself are unrelated with density at this time.

A kind of Middle School Physics buoyancy of the utility model learns experimental facilities, in the presentation process of physics floating force phenomenon, Can verify: etc. the different objects of quality swim in that buoyancy suffered when same solution is equal, with the volume of object itself with Density is unrelated；Isometric different objects when being floated in same solution suffered buoyancy differ in size, and buoyancy size and object Density it is directly proportional；Etc. the different objects of quality when being immersed in same solution the suffered buoyancy of object differ in size, and buoyancy with The density of object is inversely proportional；It is equal in magnitude that isometric different objects are immersed in buoyancy suffered when same solution, at this time buoyancy Size equal buoyancy rule unrelated with density with the quality of object itself, the displaying of image is different in a manner of Multicarity comparative experiments Buoyancy rule under situation, has very strong comparative and intuitive, can deepen student to buoyancy knowledge by comparative experiments Understanding, student's operating ability and students ' interest of study are improved, compared to traditional buoyancy experiment equipment, the utility model The accuracy of experimental data measurement and the convenience of operation, the pumping that student is encountered in exercise are improved using wooden cask type container As the buoyancy situation of change is shown with physical form, student is allowed to start to test, buoyancy rule is probed into a manner of practice, not only Student's operating ability is improved, and increases the interest of study, students ' interest of study is improved, theory hard to understand is known Knowledge is shown in a manner of full-scale investigation, significantly intensification student memory and understanding, for improve physics student learning interest and The start raising of experimental ability and quality of instruction of student has great positive benefit.

It is enlightenment, through the above description, art technology with the above-mentioned desirable embodiment according to the utility model Personnel can carry out various changes and amendments without departing from the scope of the technological thought of the present invention' completely.This invention Technical scope be not limited to the contents of the specification, it is necessary to its technical model is determined according to scope of the claims It encloses.

Claims (3)

1. a kind of Middle School Physics buoyancy learns experimental facilities, including cylinder (8), bracket and weight beam (3), it is characterized in that: It is respectively equipped with corresponding opening (10) in the cylinder (8) lateral wall two sides, the opening on the cylinder (8) lateral wall (10) equipped with several plugboards (11) with the opening (10) two inner sidewalls interference fit in, in several plugboards (11) Outside is equipped with dismountable closed-entry and lets slip a remark (15), is equipped with bottom accommodating groove (12) in the cylinder (8) lower part, the cylinder (8) top is equipped with bracket, has hung up weight beam (3) on the bracket, is equipped with and receives in the weight beam (3) lower part Fixed rope (5).

2. Middle School Physics buoyancy according to claim 1 learns experimental facilities, it is characterized in that: being set in the cylinder (8) Have partition (34), the partition (34) may be designed as linear type or " Y " font or " cross " or " * " shape, thus real Now two chambers, three chambers, four chambers, six chambers will be divided into inside cylinder (8), each solution cavity (35) outer wall in the cylinder (8) On be equipped with opening (10), it is described opening (10) on be equipped with several piece and it is described opening (10) interference fit plugboard (11), Jack (36) are equipped in the middle part of the partition (34), are plugged with hanging rack (31), the hanging rack in the jack (36) (31) linear type or " Y " font or " cross " or " * " shape, the shape and partition of the hanging rack (31) be may be designed as (34) the corresponding Synchronization Design of shape has hung up spring corresponding with each solution cavity (35) in the hanging rack (31) lower part Dynamometer (3).

3. Middle School Physics buoyancy according to claim 1 or 2 learns experimental facilities, it is characterized in that: on the cylinder (8) Opening (10) two inner walls on be equipped with raised rib (14), be equipped on several plugboard (11) two sidewalls with it is described The compatible internal concave hopper chute (22) of raised rib (14) being open on (10) two inner walls, the indent that the plugboard (11) passes through two sides Raised rib (14) on (10) two inner walls of sliding slot (22) and opening carries out clearance fit.