CN210142435U

CN210142435U - Portable buoyancy experiment demonstration device for physical teaching

Info

Publication number: CN210142435U
Application number: CN201920924446.1U
Authority: CN
Inventors: 谭军
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-19
Filing date: 2019-06-19
Publication date: 2020-03-13
Anticipated expiration: 2029-06-19

Abstract

The utility model discloses a physics teaching is with portable buoyancy experiment presentation device, including detecting the box that the cavity is the cuboid structure in with, the relative both sides inner wall of box is close to the top and all is provided with a pair of fixed plate, and all rotates between two fixed plates and be connected with the fixed pulley, the top inner wall of box is close to the fixed pulley department of both sides and all is provided with wire wheel, two equal joint has the fine rule, two in the race of wire wheel the bottom of fine rule is first pouring weight of fixedly connected with and showy thing piece respectively, the upper surface of box is close to both sides edge and all is provided with locking device, and locking device includes the fixed block, set up at the perpendicular through-hole of fixed block upper surface, set up the rubber stopper slide that link up with it in the fixed block side. The utility model discloses guaranteed that the detection liquid in the box is in the horizontality at the during operation to ensure that the reading on the scale mark is correct, avoided the pouring weight to only receive the ascending power of vertical direction.

Description

Portable buoyancy experiment demonstration device for physical teaching

Technical Field

The utility model relates to a teaching technical field especially relates to a physics teaching is with portable buoyancy experiment presentation device.

Background

In high school physics teaching, various experiments are often needed, in a physical experiment for measuring the buoyancy of an object in liquid, the object immersed in the liquid discharges a certain volume of liquid, and the gravity of the part of the volume of the liquid is equal to the buoyancy of the object.

In general experimental apparatus, the overflow mouth is direct to level with the liquid level, and in experimental operation, the liquid level easily receives the influence of object and arouses undulant, because the liquid level has leveled with the minimum of overflow mouth, the head-up then can be discharged, undulant liquid level causes the discharge of excessive liquid easily, influences the experimental result, general discharge liquid's volume is got by the graduated flask reading, the mode is single, can not direct vivid understanding the meaning of buoyancy, consequently just need one kind can conveniently understand and avoid producing the buoyancy presentation device of reading error.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a portable buoyancy experiment demonstration device for physical teaching.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a portable buoyancy experiment demonstration device for physical teaching comprises a box body which is of a cuboid structure and is used for detecting liquid and internally provided with a cavity, wherein a pair of fixing plates are arranged on the inner walls of two opposite sides of the box body close to the top end, a fixed pulley is rotatably connected between the two fixing plates, guide wheels are arranged on the inner wall of the top end of the box body close to the fixed pulleys on the two sides, thin wires are clamped in grooves of the guide wheels, the bottom ends of the two thin wires are fixedly connected with a first weight block and a floating object block respectively, locking devices are arranged on the upper surface of the box body close to the edges of the two sides, each locking device comprises a fixing block, a vertical through hole arranged on the upper surface of the fixing block, a rubber plug slide which is communicated with the side surface of the fixing block and a rubber plug which is slidably connected in the rubber plug slide, and an observation, transparent glass is clamped in the observation window, and the front face of the box body close to the observation window is marked with scale marks.

Preferably, the first weight has a density greater than the density of the test liquid and the buoyant mass has a density less than the density of the test liquid, the weight of the buoyant mass being known.

Preferably, the middle part of the top end of the box body is provided with a sinking groove, and a level gauge is embedded in the sinking groove.

Preferably, the lower surface of box is close to four corners and all is provided with the flexible pipe of spiral, and the flexible low side of pipe of spiral all is equipped with anti-skidding gasket, and the side of box is close to the bottom and reserves the drain valve.

Preferably, the middle part of the vertical through hole is provided with a stepped counter bore, and the axial lead of the stepped counter bore is superposed with the rubber plug slide way.

Preferably, the bottom of the stepped counter bore is provided with an extension spring, one end of the extension spring, which is far away from the bottom of the stepped counter bore, is fixed with a baffle plate, two support rods are fixed on the side face of the baffle plate, and the other ends of the support rods are fixed on the outer wall of the rubber plug.

Preferably, one side of the rubber plug, which is far away from the extension spring, is inserted with a pull rod, and the top end of the pull rod is fixed with a pull ring.

The utility model has the advantages that:

1. through the box that sets up and the detection liquid in the box, avoided traditional needs to extrude liquid into the box, spill over the in-process at liquid moreover and can avoid the waste to appear, influence measurement accuracy, and detect as for the box is inside then avoided sloshing of liquid to liquid can not spill over and volatilize and improved measurement accuracy.

2. Through the level gauge and the spiral extension tubes at the four corners of the bottom of the box body, the detection liquid in the box body is ensured to be in a horizontal state during working, so that the reading on the scale marks is ensured to be correct, and the weight block is prevented from being only stressed in the vertical direction.

3. Through the set floating object block, the special condition in the buoyancy can be researched, namely the calculation mode of the buoyancy of the object in the floating state, and the law that the buoyancy is equal to the gravity can be obviously and easily obtained.

Drawings

Fig. 1 is a schematic view of a cross-sectional structure of a portable buoyancy experiment demonstration device for physical teaching according to the present invention;

fig. 2 is a schematic view of a cross-sectional structure of a portable buoyancy experiment demonstration device locking device for physical teaching according to the present invention;

fig. 3 is the utility model provides a portable buoyancy experiment presentation device's for physical teaching owner looks the structure sketch map.

In the figure: the device comprises a box body 1, a first weight block 2, a pull ring 3, a vertical through hole 4, a stepped counter bore 5, a locking device 6, an extension spring 7, a thin wire 8, a level gauge 9, a wire guide wheel 10, a fixed pulley 11, a fixed plate 12, a floating object block 13, a drain valve 14, a spiral extension tube 15, a detection liquid 16, a rubber plug 17, a rubber plug slide way 18, an observation window 19 and scale marks 20.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, a portable buoyancy experiment demonstration device for physics teaching comprises a liquid detection body 16 and a box body 1 with a cuboid structure in the cavity, a pair of fixing plates 12 are arranged on the inner walls of two opposite sides of the box body 1 near the top end, a fixed pulley 11 is rotatably connected between the two fixing plates 12, guide wheels 10 are arranged on the inner wall of the top end of the box body 1 near the fixed pulleys 11 on the two sides, thin wires 8 are clamped in the grooves of the two guide wheels 10, the bottom ends of the two thin wires 8 are fixedly connected with a first weight block 2 and a floating object block 13 respectively, locking devices 6 are arranged on the upper surface of the box body 1 near the edges of the two sides, each locking device 6 comprises a fixing block, a vertical through hole 4 arranged on the upper surface of the fixing block, a rubber plug slide 18 arranged on the side surface of the fixing block and communicated with the fixing block, and a, an observation window 19 is reserved on the front surface of the box body 1 close to the middle part, transparent glass is clamped in the observation window 19, and scale marks 20 are marked on the front surface of the box body 1 close to the observation window 19.

In the utility model, the density of the first weight block 2 is greater than the density of the detection liquid 16, and the density of the floating object block 13 is less than the density of the detection liquid 16, the weight of the floating object block 13 is known, the middle part of the top end of the box body 1 is provided with a sinking groove, and a level meter 9 is embedded in the sinking groove, the lower surface of the box body 1 is provided with spiral extension tubes 15 near four corners, the lower ends of the spiral extension tubes 15 are provided with anti-slip gaskets, the side surface of the box body 1 is reserved with a drain valve 14 near the bottom end, the middle part of the vertical through hole 4 is provided with a step counter bore 5, the axial lead of the step counter bore 5 coincides with a rubber plug slide way 18, the bottom of the step counter bore 5 is provided with an extension spring 7, the end of the extension spring 7 far away from the bottom of the step counter bore 5 is fixed with a baffle, the side surface of the baffle is fixed with two support, and a pull ring 3 is fixed on the top end of the pull rod.

The working principle is as follows: when the device is used, the device is placed on a test bed, then the deflection indication direction of the level gauge 9 at the top end of the box body 1 is observed, and then the spiral extension tubes 15 at four corners of the bottom of the box body 1 are adjusted until the level gauge 9 at the top end of the box body 1 is horizontal; then, pulling out the oak plug at one end of the thin line 8, which is far away from the heavy block, pulling the pull ring 3, wherein the rubber plug slides along the rubber plug slide way 18 and leaves the vertical through hole 4, the thin line 8 can move downwards under the action of the tension of the heavy block 2, when the first heavy block 2 completely enters the detection liquid 16, the liquid level of the liquid rises, and the buoyancy can be calculated according to the rising scale; if the buoyancy calculation formula in a special state needs to be demonstrated, the oak plug in the other locking device 6 is pulled out, the floating object block 13 descends, the rising liquid level indicating number represents the V row, and the calculated value is equal to the gravity of the floating object block 13.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a physics teaching is with portable buoyancy experiment presentation device, is box (1) that the cavity is the cuboid structure in detecting liquid (16) and establishing, its characterized in that, the relative both sides inner wall of box (1) is close to the top and all is provided with a pair of fixed plate (12), and all rotates between two fixed plate (12) and be connected with fixed pulley (11), fixed pulley (11) department that the top inner wall of box (1) is close to both sides all is provided with wire wheel (10), two equal joint has fine rule (8), two in the wheel groove of wire wheel (10) the bottom of fine rule (8) is first pouring weight (2) of fixedly connected with and floats thing piece (13) respectively, the upper surface of box (1) is close to both sides edge and all is provided with locking device (6), and locking device (6) including the fixed block, set up perpendicular through-hole (4) at the fixed block upper surface, Set up rubber stopper slide (18) and rubber stopper (17) of sliding connection in rubber stopper slide (18) that the fixed block side link up with it, the front of box (1) is close to the middle part and has been reserved observation window (19), and has spliced in observation window (19) transparent glass, the front of box (1) is close to observation window (19) department and is marked scale mark (20).

2. A portable buoyancy test demonstration device for physical education as claimed in claim 1 wherein the density of the first weight (2) is greater than the density of the test liquid (16) and the density of the float mass (13) is less than the density of the test liquid (16).

3. The portable buoyancy experiment demonstration device for physics teaching of claim 1 characterized in that the top middle of box (1) is equipped with a sink, and level (9) is embedded in the sink.

4. The portable buoyancy experiment demonstration device for physics teaching of claim 3 characterized in that the lower surface of box (1) near four corners all is provided with spiral telescopic pipe (15), and the low end of spiral telescopic pipe (15) all is equipped with anti-skidding gasket, and the side of box (1) near the bottom reserves drain valve (14).

5. The portable buoyancy experiment demonstration device for physics teaching of claim 1 characterized in that the middle of the vertical through hole (4) is opened with a stepped counterbore (5) and the axial lead of the stepped counterbore (5) coincides with the rubber stopper slide way (18).

6. The portable buoyancy experiment demonstration device for physics teaching of claim 5, characterized in that extension spring (7) is arranged at the bottom of the stepped counterbore (5), and a baffle is fixed at one end of the extension spring (7) far away from the bottom of the stepped counterbore (5), two support rods are fixed at the side of the baffle, and the other ends of the support rods are fixed on the outer wall of the rubber stopper (17).

7. The portable buoyancy experiment demonstration device for physics teaching of claim 6 is characterized in that the rubber stopper (17) is inserted with a pull rod at the side far away from the extension spring (7), and the pull ring (3) is fixed at the top end of the pull rod.