CN111871480A

CN111871480A - Physical teaching is with safe type experimental apparatus

Info

Publication number: CN111871480A
Application number: CN202010955089.2A
Authority: CN
Inventors: 高犇
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2020-11-03
Anticipated expiration: 2040-09-11
Also published as: CN111871480B

Abstract

The invention discloses a safety experimental device for physics teaching, which comprises an experiment table, a beaker, a heating unit, a bottle, a transparent water tank and a transfer unit for transferring the bottle into the transparent water tank, wherein the heating unit comprises a first mounting plate for mounting the beaker, a driving mechanism for driving the first mounting plate to move, a clamping assembly for fixing the beaker and a heating assembly for heating the beaker; after accomplishing the experiment, open the valve and let the water in the transparent basin drain through the outlet, degree of automation is high, has improved the experimental efficiency, does not need manual operation, and the security is high.

Description

Physical teaching is with safe type experimental apparatus

Technical Field

The invention relates to the technical field of physical teaching experiments, in particular to a safety type experimental device for physical teaching.

Background

The existing experimental device for physical teaching has the defects of unsafety and inconvenience in experiments, so that a safe and convenient safe experimental device for physical teaching needs to be researched urgently.

The Chinese invention patent CN107731059B discloses an experimental device for physical teaching, in particular to a safe experimental device for physical teaching. The invention aims to provide a safe and convenient physical teaching safety experimental device. In order to solve the technical problems, the invention provides a safety experimental device for physics teaching, which comprises a glass cylinder, a bottom plate, a lamp holder, an alcohol lamp, a beaker, a bottle, a heating mechanism, a lifting mechanism, a rotating mechanism, a fourth supporting rod, a fourth bearing seat and the like; the water outlet pipe is fixedly connected below the side part of the glass cylinder, the valve is arranged on the water outlet pipe, and the lamp holder is fixedly connected to the other end part of the bottom plate; the alcohol lamp is fixedly connected to the top of the lamp holder; the heating mechanism is pivoted with the bottom plate and is tightly attached to the lamp holder; the beaker is placed on the heating mechanism. The volcanic explosion physical experiment is carried out under the mutual cooperation of the heating mechanism, the lifting mechanism and the rotating mechanism, so that the effect of convenient and safe experiment is achieved;

however, the water in the beaker of the device is transferred into the bottle, which cannot be accurately operated and is easy to spill and scald.

Disclosure of Invention

The invention aims to provide a safety experimental device for physics teaching, which aims to solve the problems.

In order to achieve the purpose, the invention provides the following technical scheme:

a safety experimental device for physics teaching comprises an experimental table, beakers, a heating unit, bottles, a transparent water tank and a transfer unit for transferring the bottles into the transparent water tank, wherein a water outlet is formed in the bottom of the transparent water tank, a valve is installed on the water outlet, the heating unit comprises a first mounting plate for mounting the beakers, a driving mechanism for driving the first mounting plate to move, a clamping assembly for fixing the beakers and a heating assembly for heating the beakers, a clamping hole for mounting the beakers is formed in the first mounting plate, the heating assembly is installed on the experimental table and located right below the clamping hole, an auxiliary assembly for assisting in pouring out water in the beakers is installed on the first mounting plate and comprises a supporting plate, a first motor, a rotary plate, a connecting rod, a movable plate and a funnel, the supporting plate is fixedly installed on the first mounting plate, the funnel is characterized in that a first motor is fixedly mounted on the support plate, a rotary table is fixedly mounted on an output shaft of the first motor, a connecting rod is hinged to the outer ring of the end face of the rotary table, the other end of the connecting rod is hinged to the movable plate, the movable plate is slidably mounted on the support plate, the funnel is fixedly mounted on the movable plate, the large opening of the funnel faces towards the beaker, an opening and closing assembly is arranged at the end portion of the small opening of the funnel and comprises a semicircular sealing plate, a linkage rod and a second spring, the two semicircular sealing plates surround to form a circular small opening for sealing the funnel, the semicircular sealing plate is mounted at the edge of the small opening of the funnel through the rotation of the linkage rod, the second spring is connected.

On the basis of the technical scheme, the invention also provides the following optional technical scheme:

in one alternative: the transfer unit includes the second pivot, is used for driving second pivot pivoted fourth motor, lifter plate, is used for driving the elevating system of lifter plate motion and is used for installing the second mounting panel of bottle, the vertical rotation of second pivot is installed on the laboratory bench, and the fourth motor is fixed in on the laboratory bench and the drive connection second pivot, elevating system includes fifth motor and lead screw, and the vertical rotation of lead screw is installed in second pivot one side, and fifth motor fixed mounting is in the second pivot, and lead screw is connected in the drive of fifth motor, lifter plate and lead screw threaded connection, lifter plate one end and second pivot sliding connection, rotate on the lifter plate and install the installation axle, and installation axle top is articulated with the second mounting panel, and the second mounting panel is the Z type, and demountable installation has the bottle bottom the second mounting panel.

In one alternative: the bottle shaking device is characterized in that a shaking mechanism used for driving the mounting plate and enabling bottles to move on the mounting plate is installed on the lifting plate, the shaking mechanism comprises a sixth motor, a disc and an elastic pull rope, the sixth motor is fixedly installed on the lifting plate, the disc is fixedly installed on an output shaft of the sixth motor, a pin shaft is installed on the outer ring of the end face of the disc in a rotating mode, the elastic pull rope is tied to the pin shaft, and the other end of the elastic pull rope is tied to the top end of the second mounting plate.

In one alternative: the heating assembly comprises an alcohol lamp, a lamp holder and a telescopic piece, the lamp holder is used for placing the alcohol lamp, the bottom of the lamp holder is fixedly connected with the experiment table through the telescopic piece, the telescopic piece comprises a threaded rod vertically fixed on the experiment table and an internal thread sleeve sleeved on the threaded rod, and the top of the internal thread sleeve is fixedly connected with the bottom of the lamp holder.

In one alternative: clamping unit mount is on first mounting panel, and the clamping subassembly includes adjusting pin, cam and setting element, the adjusting pin with locate clamping hole one side and rotate with first mounting panel and be connected, the adjusting pin extends to in the first mounting panel and is fixed with the cam, the outside cover of cam is equipped with the sponge cover, be equipped with the setting element that is used for fixed adjusting pin between adjusting pin and the first mounting panel, the setting element includes mounting disc, pin and spacing arch, mounting disc fixed mounting wears to be equipped with the pin on the adjusting pin, on the first mounting panel hoop fixed have with pin complex a plurality of spacing archs, be connected with first spring between mounting disc and the pin, the elasticity of first spring makes the pin support spacing arch all the time.

In one alternative: the driving mechanism comprises a second motor, a first rotating shaft, a support shaft and a power assembly used for driving the support shaft to rotate, the first rotating shaft is rotatably installed on the experiment table and located on one side of the heating assembly, the second motor is fixedly installed on the experiment table and is in driving connection with the first rotating shaft, the support shaft is horizontally arranged on the first rotating shaft in a penetrating mode and is installed in a rotating mode, one end of the support shaft is fixedly connected with the first installation plate, the power assembly comprises a third motor and a gear pair, the third motor is fixedly installed on the first rotating shaft, and the third motor is in driving connection with the support shaft through the gear pair.

In one alternative: the improved bottle opener is characterized in that an electric push rod is fixedly mounted on one side of a bottle on the second mounting plate and provided with a waterproof sealing ring, a seventh motor is fixedly mounted at the top of a telescopic rod of the electric push rod, a bottle cap is mounted on an output shaft of the seventh motor through a fixing rod, an ink cavity is formed in the bottle cap through a partition plate, a sealing strip is embedded in the peripheral wall of the partition plate, the partition plate is rotatably mounted in the bottle cap, a torsion spring is further connected between the partition plate and the bottle cap, and a thimble used for jacking the partition plate to rotate is fixedly.

In one alternative: the top of the bottle cap is provided with a cap adding port convenient for adding ink.

In one alternative: the bottom of the inner cavity of the bottle cap is adhered with a rubber strip, and the cross section of the rubber strip is trapezoidal.

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

the device is provided with a test table, a beaker, a heating unit, a bottle, a transparent water tank and a transfer unit for transferring the bottle into the transparent water tank, when water in the beaker is heated to boiling, a first motor drives a rotary table to rotate, the rotary table drives a movable plate to move through a connecting rod, the movable plate drives a funnel to cover on the beaker, a first rotating shaft is rotated to enable the beaker to be positioned above the bottle, a power assembly drives a mounting plate to rotate, so that the water in the beaker is poured into the bottle through the funnel, specifically, the lifting mechanism can drive the bottle to ascend, so that a thin opening of the funnel is inserted into the bottle, in the process that the thin opening of the funnel is inserted into the bottle, the inner wall of the bottle extrudes the connecting rod, the connecting rod drives a semicircular sealing plate to rotate, the thin opening of the funnel is opened, the water in the beaker flows into the bottle along the thin opening of the funnel, the water, the fixing rod is driven to rotate by a seventh motor, so that the bottle cap is rotated to be right above the bottle opening of the bottle, the bottle cap is shortened by an electric push rod to be covered on the bottle opening in a downward movement mode, the ejector pin enables the partition plate to rotate, ink in the ink cavity automatically enters the bottle, manual ink adding and bottle cap operation are not needed, scalding is avoided, working efficiency is improved, after the bottle cap is covered, the lifting mechanism is controlled to ascend, the bottle is driven to ascend, then the second rotating shaft drives the bottle to rotate to be right above the transparent water tank, then the lifting mechanism is controlled to descend, the bottle is driven to descend to enter the transparent water tank, then the bottle cap is unscrewed, reaction is observed through the transparent water tank, and a volcanic eruption experiment is rapidly completed under the mutual matching of the; after accomplishing the experiment, open the valve and let the water in the transparent basin drain through the outlet, degree of automation is high, has improved the experimental efficiency, does not need manual operation, and the security is high.

Drawings

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

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is an enlarged view of fig. 1 at B.

Fig. 4 is a schematic structural diagram of a second embodiment of the present invention.

Fig. 5 is an enlarged view of fig. 4 at C.

Notations for reference numerals: the device comprises a test bench, a 2-telescopic part, a 3-lamp holder, a 4-positioning part, a 5-first mounting plate, a 6-cam, a 7-clamping hole, an 8-adjusting pin, a 9-funnel, a 10-movable plate, an 11-opening and closing assembly, a 12-connecting rod, a 13-rotating disc, a 14-first motor, a 15-first rotating shaft, a 16-power assembly, a 17-bottle, a 18-second mounting plate, a 19-mounting shaft, a 20-elastic pull rope, a 21-disc, a 22-lifting mechanism, a 23-lifting plate, a 24-second rotating shaft, a 25-transparent water tank, a 26-bottle cap, a 27-seventh motor, a 28-electric push rod, a 29-partition plate and a 30-thimble.

Detailed Description

The present invention will be described in detail with reference to the following embodiments, wherein like or similar elements are designated by like reference numerals throughout the several views, and wherein the shape, thickness or height of the various elements may be expanded or reduced in practice. The examples are given solely for the purpose of illustration and are not intended to limit the scope of the invention. Any obvious modifications or variations can be made to the present invention without departing from the spirit or scope of the present invention.

Example 1

Referring to fig. 1 to 3, in the embodiment of the invention, a safety experimental device for physical teaching comprises an experimental table 1, a beaker, a heating unit, a bottle 17, a transparent water tank 25 and a transfer unit for transferring the bottle 17 into the transparent water tank 25, wherein a water outlet is formed in the bottom of the transparent water tank 25, a valve is mounted on the water outlet, the heating unit comprises a first mounting plate 5 for mounting the beaker, a driving mechanism for driving the first mounting plate 5 to move, a clamping assembly for fixing the beaker and a heating assembly for heating the beaker, a clamping hole 7 for mounting the beaker is formed in the first mounting plate 5, the heating assembly is mounted on the experimental table 1 and located right below the clamping hole 7, the heating assembly comprises an alcohol lamp, a lamp holder 3 for placing the alcohol lamp and a telescopic piece 2, the bottom of the lamp holder 3 is fixedly connected with the experimental table 1 through the telescopic piece 2, the telescopic part 2 comprises a threaded rod vertically fixed on the experiment table 1 and an internal thread sleeve sleeved on the threaded rod, the top of the internal thread sleeve is fixedly connected with the bottom of the lamp holder 3, the distance between an alcohol lamp on the lamp holder 3 and the bottom of a beaker can be adjusted, the heating efficiency is ensured, the clamping assembly is installed on the first installation plate 5 and comprises an adjusting pin 8, a cam 6 and a positioning part 4, the adjusting pin 8 is rotatably connected with the first installation plate 5 and arranged on one side of a clamping hole 7, the adjusting pin 8 extends into the first installation plate 5 and is fixed with the cam 6, further, the cam 6 is sleeved with a sponge sleeve, the positioning part 4 for fixing the adjusting pin 8 is arranged between the adjusting pin 8 and the first installation plate 5, the positioning part 4 can select a fastening bolt, in the embodiment, the positioning part 4 comprises an installation disc, a pin and a limiting bulge, the mounting disc is fixedly arranged on the adjusting pin 8, a pin is arranged on the mounting disc in a penetrating manner, a plurality of limiting bulges matched with the pin are axially fixed on the first mounting plate 5, a first spring is connected between the mounting disc and the pin, the pin always supports the limiting bulges due to the elasticity of the first spring, the adjusting pin 8 is rotated to drive the cam 6 to rotate, the cam 6 is clamped in the clamping hole 7 when rotated, beakers with different sizes can be clamped, then the position of the adjusting pin 8 is fixed through the positioning part 4 to maintain the clamping force, the driving mechanism comprises a second motor, a first rotating shaft 15, a supporting shaft and a power component 16 for driving the supporting shaft to rotate, the first rotating shaft 15 is rotatably arranged on the experiment table 1 and positioned on one side of the heating component, the second motor is fixedly arranged on the experiment table 1 and is in driving connection with the first rotating shaft 15, in the embodiment, the output shaft of the second motor is preferably fixedly connected with the first rotating shaft 15 through a coupler, the first rotating shaft 15 is horizontally penetrated, rotated and provided with a support shaft, one end of the support shaft is fixedly connected with the first mounting plate 5, the power assembly 16 comprises a third motor and a gear pair, the third motor is fixedly mounted on the first rotating shaft 15 and is in driving connection with the support shaft through the gear pair, furthermore, the first mounting plate 5 is provided with an auxiliary assembly for assisting in pouring out water in the beaker, the auxiliary assembly comprises a support plate, a first motor 14, a rotary plate 13, a connecting rod 12, a movable plate 10 and a funnel 9, the support plate is fixedly mounted on the first mounting plate 5, the support plate is fixedly provided with the first motor 14, the output shaft of the first motor 14 is fixedly provided with the rotary plate 13, the outer ring of the end face of the rotary plate 13 is hinged with the connecting rod 12, and the other end of the connecting rod, the movable plate 10 is slidably mounted on the support plate, the funnel 9 is fixedly mounted on the movable plate 10, the large opening of the funnel 9 faces the beaker, the end part of the small opening of the funnel 9 is provided with an opening and closing assembly 11, the opening and closing assembly 11 comprises a semicircular sealing plate, a linkage rod and a second spring, the two semicircular sealing plates surround to form a circle to seal the small opening of the funnel 9, the semicircular sealing plate is rotatably mounted at the edge of the small opening of the funnel 9 through the linkage rod, the second spring is connected between the linkage rod and the outer wall of the funnel 9, the rotary disc 13 is driven to rotate through the first motor 14, the rotary disc 13 drives the movable plate 10 to move through the connecting rod 12, the movable plate 10 drives the funnel 9 to cover the beaker, and water in the beaker;

further, the transfer unit is located between the heating unit and the transparent water tank 25, the transfer unit includes a second rotating shaft 24, a fourth motor for driving the second rotating shaft 24 to rotate, a lifting plate 23, a lifting mechanism 22 for driving the lifting plate 23 to move, and a second mounting plate 18 for mounting the bottle 17, the second rotating shaft 24 is vertically rotatably mounted on the experiment table 1, the fourth motor is fixed on the experiment table 1 and is in driving connection with the second rotating shaft 24, the lifting mechanism 22 includes a fifth motor and a lead screw, the lead screw is vertically rotatably mounted on one side of the second rotating shaft 24, the fifth motor is fixedly mounted on the second rotating shaft 24, the fifth motor is in driving connection with the lead screw, the lifting plate 23 is in threaded connection with the lead screw, one end of the lifting plate 23 is in sliding connection with the second rotating shaft 24, a mounting shaft 19 is rotatably mounted on the lifting plate 23, and the top of the mounting shaft 19 is hinged to the second mounting, the second mounting plate 18 is Z-shaped, the bottom of the second mounting plate 18 is detachably provided with a bottle 17, the lifting plate 23 is provided with a shaking mechanism for driving the mounting plate and the bottle 17 to move thereon, the shaking mechanism comprises a sixth motor, a disc 21 and an elastic pull rope 20, the sixth motor is fixedly arranged on the lifting plate 23, the disc 21 is fixedly arranged on an output shaft of the sixth motor, a pin shaft is rotatably arranged on the outer ring of the end surface of the disc 21, the pin shaft is tied with the elastic pull rope 20, the other end of the elastic pull rope 20 is tied with the top end of the second mounting plate 18, the disc 21 is driven to rotate by the sixth motor, the disc 21 drives the second mounting plate 18 to shake in multiple directions by the elastic pull rope 20, so that the mixing of ink and water inside the bottle 17 is facilitated, when the device is used for experiments, students pour the water into a beaker and a transparent water tank 25, then place the beaker, the water in the beaker is heated to boiling, the rotating disc 13 is driven to rotate through the first motor 14, the rotating disc 13 drives the movable plate 10 to move through the connecting rod 12, the movable plate 10 drives the funnel 9 to cover the beaker, the first rotating shaft 15 is rotated to enable the beaker to be positioned above the bottle 17, the mounting plate is driven to rotate through the power assembly 16, so that the water in the beaker is poured into the bottle 17 through the funnel 9, specifically, the bottle 17 can be driven to ascend through the lifting mechanism 22, so that the narrow opening of the funnel 9 is inserted into the bottle 17, the narrow opening of the funnel 9 is inserted into the bottle 17 in the process of inserting the narrow opening of the bottle 17, the connecting rod is extruded by the inner wall of the bottle 17 and drives the semicircular sealing plate to rotate, so that the narrow opening of the funnel 9 is opened, the water in the beaker flows into the bottle 17 along the narrow opening of the funnel 9, and the water is prevented from being spilled, then the lifting mechanism 22 drives the bottle 17 to descend to be separated from the funnel 9, then ink is dripped into the bottle 17, the bottle cap 26 is covered, the lifting mechanism 22 is controlled to ascend to drive the bottle 17 to ascend, then the second rotating shaft 24 drives the bottle 17 to rotate to be right above the transparent water tank 25, then the lifting mechanism 22 is controlled to descend to drive the bottle 17 to descend to enter the transparent water tank 25, then the bottle cap 26 is unscrewed, the reaction is observed through the transparent water tank 25, and the volcanic eruption experiment is rapidly completed under the mutual matching of the heating unit and the transfer unit; after the experiment is completed, the valve is opened to drain the water in the transparent water tank 25 through the water outlet.

Example 2

Referring to fig. 4 to 5, the embodiment of the present invention is different from embodiment 1 in that, in order to facilitate opening and closing of the bottle cap 26 and the bottle cap 17 by dropping ink into the bottle 26, an electric push rod 28 is fixedly installed on one side of the bottle 17 on the second mounting plate 18, the electric push rod 28 is provided with a waterproof sealing ring, a seventh motor 27 is fixedly installed at the top of a telescopic rod of the electric push rod 28, the bottle cap 26 is installed on an output shaft of the seventh motor 27 through a fixing rod, an ink chamber is provided in the bottle cap 26 through a partition 29, a cap adding port for adding ink is provided at the top of the bottle cap 26, a sealing strip is embedded in a peripheral wall of the partition 29, the partition 29 is rotatably installed in the bottle cap 26, a torsion spring is further connected between the partition 29 and the bottle cap 26, so that the partition 29 is kept in a horizontally closed state, a rubber, the rubber strip is used for avoiding leaking ink between bottle lid 26 and the bottleneck, bottleneck top fixed mounting of bottle 17 has and is used for pushing up 29 pivoted thimbles 30 of baffle, drives the dead lever through seventh motor 27 and rotates for bottle lid 26 rotates directly over the bottleneck of bottle 17, shortens through electric putter 28, makes bottle lid 26 downstream cover on the bottleneck, thimbles 30 make baffle 29 rotate, and the automatic bottle 17 that gets into of ink intracavity's ink does not need manual interpolation ink and operation bottle lid 26, avoids scalding and has improved work efficiency.

The working principle of the invention is as follows: when the water in the beaker is heated to boiling, the first motor 14 drives the rotary table 13 to rotate, the rotary table 13 drives the movable plate 10 to move through the connecting rod 12, the movable plate 10 drives the funnel 9 to cover the beaker, the first rotating shaft 15 is rotated to enable the beaker to be positioned above the bottle 17, the power assembly 16 drives the mounting plate to rotate, so that the water in the beaker is poured into the bottle 17 through the funnel 9, specifically, the lifting mechanism 22 can drive the bottle 17 to ascend, so that the narrow opening of the funnel 9 is inserted into the bottle 17, in the process that the narrow opening of the funnel 9 is inserted into the bottle 17, the inner wall of the bottle 17 extrudes the connecting rod, the connecting rod drives the semicircular sealing plate to rotate, so that the narrow opening of the funnel 9 is opened, the water in the beaker flows into the bottle 17 along the narrow opening of the funnel 9 to avoid the water from spilling out, then the lifting mechanism 22 drives the bottle 17 to descend to be separated from the, the bottle cap 26 is rotated to be right above the bottle opening of the bottle 17, the electric push rod 28 is shortened, the bottle cap 26 moves downwards to cover the bottle opening, the ejector pin 30 enables the partition plate 29 to rotate, ink in an ink cavity automatically enters the bottle 17, manual ink adding and bottle cap 26 operation are not needed, scalding is avoided, and working efficiency is improved; after the experiment is completed, the valve is opened to drain water in the transparent water tank 25 through the water outlet, the automation degree is high, the experiment efficiency is improved, manual operation is not needed, and the safety is high.

The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A safety experimental device for physics teaching comprises an experimental table (1), beakers, a heating unit, bottles (17), a transparent water tank (25) and a transfer unit for transferring the bottles (17) into the transparent water tank (25), wherein a water outlet is formed in the bottom of the transparent water tank (25), and valves are mounted on the water outlet, the safety experimental device is characterized in that the heating unit comprises a first mounting plate (5) for mounting the beakers, a driving mechanism for driving the first mounting plate (5) to move, a clamping assembly for fixing the beakers and a heating assembly for heating the beakers, a clamping hole (7) for mounting the beakers is formed in the first mounting plate (5), the heating assembly is mounted under the clamping hole (7) on the experimental table (1), and an auxiliary assembly for assisting in pouring out water in the beakers is mounted on the first mounting plate (5), the auxiliary assembly comprises a support plate, a first motor (14), a rotary table (13), a connecting rod (12), a movable plate (10) and a funnel (9), the support plate is fixedly arranged on a first mounting plate (5), the first motor (14) is fixedly arranged on the support plate, the rotary table (13) is fixedly arranged on an output shaft of the first motor (14), the connecting rod (12) is hinged to the outer ring of the end face of the rotary table (13), the other end of the connecting rod (12) is hinged to the movable plate (10), the movable plate (10) is slidably arranged on the support plate, the funnel (9) is fixedly arranged on the movable plate (10), the large opening of the funnel (9) faces towards the beaker, an opening and closing assembly (11) is arranged at the end part of the small opening of the funnel (9), the opening and closing assembly (11) comprises a semicircular sealing plate, a linkage rod and a second spring, the two semicircular sealing plates surround the circular small opening for sealing the funnel (9), and the, a second spring is connected between the linkage rod and the outer wall of the funnel (9), and the transfer unit is positioned between the heating unit and the transparent water tank (25).

2. The physical teaching safety experiment device according to claim 1, wherein the transfer unit comprises a second rotating shaft (24), a fourth motor for driving the second rotating shaft (24) to rotate, a lifting plate (23), a lifting mechanism (22) for driving the lifting plate (23) to move, and a second mounting plate (18) for mounting the bottle (17), the second rotating shaft (24) is vertically and rotatably mounted on the experiment table (1), the fourth motor is fixed on the experiment table (1) and is in driving connection with the second rotating shaft (24), the lifting mechanism (22) comprises a fifth motor and a screw rod, the screw rod is vertically and rotatably mounted on one side of the second rotating shaft (24), the fifth motor is fixedly mounted on the second rotating shaft (24), the fifth motor is in driving connection with the screw rod, the lifting plate (23) is in threaded connection with the screw rod, one end of the lifting plate (23) is in sliding connection with the second rotating shaft (24), the mounting shaft (19) is installed in the last rotation of lifter plate (23), and mounting shaft (19) top is articulated with second mounting panel (18), and second mounting panel (18) are the Z type, and second mounting panel (18) bottom demountable installation has bottle (17).

3. The safety type experiment device for physics teaching according to claim 2, characterized in that the lifting plate (23) is provided with a shaking mechanism for driving the mounting plate and the bottle (17) thereon to move, the shaking mechanism comprises a sixth motor, a disc (21) and an elastic pull rope (20), the sixth motor is fixedly mounted on the lifting plate (23), the disc (21) is fixedly mounted on an output shaft of the sixth motor, a pin shaft is rotatably mounted on an outer ring of an end face of the disc (21), the pin shaft is tied with the elastic pull rope (20), and the other end of the elastic pull rope (20) is tied with the top end of the second mounting plate (18).

4. The physical teaching safety experimental device as claimed in claim 1, wherein the heating assembly comprises an alcohol lamp, a lamp holder (3) for placing the alcohol lamp, and a telescopic piece (2), the bottom of the lamp holder (3) is fixedly connected with the experiment table (1) through the telescopic piece (2), the telescopic piece (2) comprises a threaded rod vertically fixed on the experiment table (1) and an internal threaded sleeve sleeved on the threaded rod, and the top of the internal threaded sleeve is fixedly connected with the bottom of the lamp holder (3).

5. The safety experimental device for physical teaching according to any one of claims 1 to 4, wherein the clamping assembly is mounted on a first mounting plate (5) and comprises an adjusting pin (8), a cam (6) and a positioning member (4), the adjusting pin (8) is rotatably connected with the first mounting plate (5) and is arranged on one side of a clamping hole (7), the adjusting pin (8) extends into the first mounting plate (5) and is fixed with the cam (6), a sponge sleeve is sleeved outside the cam (6), the positioning member (4) for fixing the adjusting pin (8) is arranged between the adjusting pin (8) and the first mounting plate (5), the positioning member (4) comprises a mounting disc, a pin and a limiting protrusion, the mounting disc is fixedly mounted on the adjusting pin (8), a pin is arranged on the mounting disc in a penetrating manner, a plurality of limiting protrusions matched with the pin are axially fixed on the first mounting plate (5), be connected with first spring between mounting disc and the pin, the elasticity of first spring makes the pin support spacing arch all the time.

6. The physical teaching safety type experimental device according to claim 5, wherein the driving mechanism comprises a second motor, a first rotating shaft (15), a fulcrum shaft and a power assembly (16) for driving the fulcrum shaft to rotate, the first rotating shaft (15) is rotatably installed on the experiment table (1) and located on one side of the heating assembly, the second motor is fixedly installed on the experiment table (1) and is in driving connection with the first rotating shaft (15), the fulcrum shaft is horizontally arranged on the first rotating shaft (15) in a penetrating and rotating mode, one end of the fulcrum shaft is fixedly connected with the first installation plate (5), the power assembly (16) comprises a third motor and a gear pair, the third motor is fixedly installed on the first rotating shaft (15), and the third motor is in driving connection with the fulcrum shaft through the gear pair.

7. The safety experimental device for physics teaching according to claim 2, characterized in that an electric push rod (28) is fixedly installed on one side of the bottle (17) on the second mounting plate (18), the electric push rod (28) is provided with a waterproof sealing ring, a seventh motor (27) is fixedly installed on the top of a telescopic rod of the electric push rod (28), a bottle cap (26) is installed on an output shaft of the seventh motor (27) through a fixing rod, an ink cavity is formed in the bottle cap (26) through a partition plate (29), a sealing strip is embedded in the peripheral wall of the partition plate (29), the partition plate (29) is rotatably installed in the bottle cap (26), a torsion spring is further connected between the partition plate (29) and the bottle cap (26), and a thimble (30) for pushing the partition plate (29) to rotate is fixedly installed on the top of the bottle (17).

8. The physical teaching safety experimental device according to claim 7, wherein a cap adding port for facilitating adding ink is arranged at the top of the bottle cap (26).

9. The safety experimental device for physics teaching as claimed in claim 7, wherein the rubber strip is adhered to the bottom of the inner cavity of the bottle cap (26), and the cross section of the rubber strip is trapezoidal.