Multifunctional physical experiment demonstration frame

Abstract

The utility model relates to a multifunctional physical experiment demonstration frame, which ingeniously utilizes containers with different diameters and matched parts such as a connecting mechanism, a lifting mechanism and a water pump, realizes the exploration of the relationship between hydraulic pressure and mass, density and depth, and demonstrates a waterway analogy circuit experiment. Teachers can conveniently and visually display the physical principle, and the teaching effect is improved. The physical experiment teaching aid has the advantages of being simple in structure, low in cost, diversified in function and the like, can meet the requirements of different teaching scenes, enriches physical experiment teaching means, and is helpful for students to deeply understand abstract concepts and cultivate scientific thinking.

Description

Technical Field

[0001] This utility model relates to the field of teaching aids technology, and in particular to a multifunctional physics experiment demonstration stand. Background Technology

[0002] In the field of secondary school physics experimental teaching, experimental demonstration devices for understanding the concepts of liquid pressure and voltage have the following significant technical shortcomings: First, the integration of functions is poor. Under current technological conditions, liquid pressure demonstration devices and water circuit analogy experimental devices related to understanding voltage concepts are independent devices, which present many problems: for example, there is a lack of compatibility design between different experimental modules, making it difficult to achieve functional integration and synergy; when switching experimental functions, the entire device must be replaced, which not only increases teaching costs but also consumes a lot of preparation time. Second, they occupy a large area. When two devices are placed simultaneously, they greatly occupy classroom space, which is not conducive to optimizing the teaching environment. In addition, in experiments such as Pascal's cracked barrel experiment, the water container needs to be lifted to a high place, which requires teachers to have climbing equipment, which not only increases the difficulty of operation but also brings safety hazards. Finally, the process of switching between different experimental devices affects the continuity of teaching, causing students to become distracted during the learning process and reducing the efficiency of knowledge absorption; it is not conducive to students understanding related physical concepts through experimental demonstrations, thus affecting the improvement of teaching quality. Utility Model Content

[0003] Therefore, it is necessary to provide a multifunctional physical experiment demonstration stand.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A multi-functional physical experiment demonstration rack, comprising: a multi-purpose rack: having a base and a mounting plate vertically fixed to the upper surface of the base; the upper part of the front end face of the mounting plate is provided with a first fixing part, a second fixing part and a third fixing part in sequence, and the rear side wall is provided with a plurality of buckles arranged in a vertical direction;

[0005] Container assembly: includes a first container disposed on the first fixing part, a second container disposed on the second fixing part, and a third container disposed on the third fixing part;

[0006] Pumping component: installed inside the third container;

[0007] Connection mechanism: Composed of a first connecting pipe and a second connecting pipe; the two ends of the first connecting pipe are respectively connected to the bottom of the first container and the bottom of the second container; the two ends of the second connecting pipe are respectively connected to the bottom of the first container and the outlet of the pumping component.

[0008] Lifting mechanism: connected to the buckle and fixed to the rear side wall of the mounting plate.

[0009] In one embodiment, the mounting plate side wall bottom is provided with a plurality of reinforcing ribs; the mounting plate front end face is provided with a plurality of horizontal reference lines which are parallel to each other and equally spaced.

[0010] In one embodiment, the water pumping component is a water pump which is fixedly installed inside the third container.

[0011] In one embodiment, the second fixing part is provided with a through hole, and the upper end of the second fixing part is provided with a bracket; a plurality of clamping grooves are symmetrically arranged on the two sides of the bracket, and a fixing plate is arranged inside the bracket and clamped at the two ends of the fixing plate and the corresponding clamping grooves on the two sides of the bracket; a connecting rope is arranged at the bottom of the fixing plate, and the bottom of the connecting rope is connected with the upper end of the second container through the through hole.

[0012] In one embodiment, the inner diameter of the third container is greater than the inner diameter of the first container, and the inner diameter of the first container is greater than the inner diameter of the second container.

[0013] In one embodiment, one end of the first connecting pipe is connected with the bottom of the first container through a quick release joint, and the other end is fixedly connected with the bottom of the second container; the two ends of the first connecting pipe are both provided with a first valve.

[0014] In one embodiment, the second connecting pipe includes an upper guide pipe and a lower guide pipe; one end of the upper guide pipe is connected with the water outlet of the water pumping component, and the other end extends into the first container; one end of the lower guide pipe is connected with the bottom of the third container, and the other end is connected with the bottom of the first container; a second valve is arranged at the end of the lower guide pipe close to the water pumping component, and a water flow indicator is arranged at the middle of the lower guide pipe.

[0015] In one embodiment, the front end face of the mounting plate is provided with a fan, and the fan is arranged above the water flow indicator.

[0016] In one embodiment, the lifting mechanism is a telescopic rod which is composed of a plurality of rod bodies with diameters decreasing in sequence; the outermost rod body is fixed to the rear side wall of the mounting plate through the buckle.

[0017] In one embodiment, the top of the telescopic rod is provided with a hook; a winding and unwinding rope is arranged along the length direction of the telescopic rod, and a fourth container is connected with the upper end of the winding and unwinding rope through the hook; one end of a long guide pipe is connected with the bottom of the fourth container, and the other end of the long guide pipe is connected with a syringe fixed to the upper end of the base.

[0018] The utility model discloses a beneficial effect is: the utility model discloses a kind of multifunctional physical experiment demonstration frame, by being set on the mounting plate of multipurpose frame first fixed part, second fixed part and third fixed part, respectively for fixing first container, second container and third container, second fixed part upper is equipped with support, support both sides are equipped with slot, fixed plate is connected by with the slot of different height clamping, the bottom of fixed plate is connected with second container by connecting rope, by adjusting fixed plate and the slot of different height connection, to adjust the height of second container. First connecting pipe is connected first container and second container, and water flow is controlled by first valve, to carry out communicating vessel experiment;The upper guide pipe in second connecting pipe is connected first container and water pump, and third container and first container are connected by lower guide pipe, form complete reflux, to carry out water circuit analogy circuit experiment, convenient to demonstrate circuit principle. The height of hook is improved by telescopic link, and pulling release rope can control the lifting of fourth container, to add liquid in fourth container in the experiment of exploring hydraulic pressure and depth related can be convenient;The utility model integrates multiple experiment functions in one, with the advantages of simple structure, ingenious design, can simplify operation process, improve teaching effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, it should be understood that the following drawings only show some embodiments of the present application, therefore should not be regarded as the limitation to the scope, for ordinary skilled person in the art, on the premise of not paying creative labor, can also obtain other related drawings according to these drawings.

[0020] Figure 1 It is a front view of the multifunctional physical experiment demonstration frame of an embodiment;

[0021] Figure 2 It is another state of the front view of the multifunctional physical experiment demonstration frame of an embodiment;

[0022] Figure 3 It is the rear view of the multifunctional physical experiment demonstration frame of an embodiment.

[0023] In the drawings, 10, multi-functional physical experiment demonstration rack; 100, multi-purpose rack; 110, base; 120, mounting plate; 121, first fixed part; 122, second fixed part; 1221, support; 1222, clamping groove; 1223, fixed plate; 123, third fixed part; 124, first container; 125, second container; 126, third container; 127, buckle; 128, reinforcing rib; 129, reference line; 200, pumping component; 300, connecting mechanism; 310, first connecting pipe; 320, first valve; 330, second connecting pipe; 331, upper guide pipe; 332, lower guide pipe; 333, second valve; 334, water flow indicator; 400, lifting mechanism; 410, telescopic rod; 420, hook; 430, fourth container; 440, long guide pipe; 450, syringe; 500, fan. DETAILED DESCRIPTION

[0024] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The technical solutions of the present application will be further described below with reference to the drawings of the embodiments of the present application. The present application is not limited to the following specific embodiments.

[0025] It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components. In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "top" and "bottom" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation of the present application, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0026] In one embodiment, as Figure 1 , Figure 2 and Figure 3As shown, a multifunctional physical experiment demonstration rack 10 comprises: a multifunctional rack 100, which has a base 110 and a mounting plate 120 vertically fixed to the upper end surface of the base 110; a first fixing part 121, a second fixing part 122 and a third fixing part 123 are sequentially arranged on the upper part of the front end surface of the mounting plate 120, and a plurality of buckles 127 are arranged on the rear side wall in the vertical direction; a container assembly, which comprises a first container 124 arranged on the first fixing part 121, a second container 125 arranged on the second fixing part 122 and a third container 126 arranged on the third fixing part 123; a water pumping part 200, which is installed inside the third container 126; a connecting mechanism 300, which comprises a first connecting pipe 310 and a second connecting pipe 330; the two ends of the first connecting pipe 310 are respectively connected with the bottom of the first container 124 and the bottom of the second container 125; the two ends of the second connecting pipe 330 are respectively connected with the bottom of the first container 124 and the water outlet of the water pumping part 200; a lifting mechanism 400, which is connected with the buckles 127 and fixed to the rear side wall of the mounting plate 120.

[0027] In the embodiment, the upper end surface of the base 110 in the multi-purpose rack 100 is fixedly connected with the bottom of the mounting plate 120, the first fixing part 121, the second fixing part 122 and the third fixing part 123 are sequentially fixed on the upper part of the front end surface of the mounting plate 120 from left to right, and the height of the second fixing part 122 is higher than the height of the first fixing part 121, the first container 124 in the container assembly is fixed on the first fixing part 121, and the bottom of the first container 124 extends below the first fixing part 121, the second container 125 is arranged below the second fixing part 122, the first container 124 and the second container 125 are connected through the first connecting pipe 310 in the connecting mechanism 300, so as to form a communicating vessel, and experiments are carried out by using the communicating vessel to explore the relationship between hydraulic pressure and the mass and density of liquid; a plurality of buckles 127 are arranged on the back surface of the mounting plate 120, the plurality of buckles 127 are arranged in a vertical line, the buckles 127 are matched with the lifting mechanism 400, so as to fix the lifting mechanism 400 on the back surface of the mounting plate 120, and experiments, such as Pascal barrel experiment, which need to be carried out at a high place, are facilitated to be completed through the lifting mechanism 400, so as to explore the relationship between hydraulic pressure and liquid depth; the third container 126 is fixed on the third fixing part 123, the water pumping part 200 is arranged in the third container 126, the first container 124 and the third container 126 are connected through the second connecting pipe 330, and the water outlet end of the water pumping part 200 is also connected with the first container 124 through the second connecting pipe 330, so as to form a complete loop, so that the water circuit is used to learn the circuit, and students can conveniently understand the circuit principle; wherein the first container 124, the second container 125 and the third container are all made of transparent material, so that the liquid level height in the containers can be observed, different experimental modules are integrated on one multi-purpose rack 100, the convenient demonstration of various physical experiments is realized, the teaching effect is improved, the complexity and cost of experimental equipment are reduced, and the space occupied by the demonstration device is reduced.

[0028] In one embodiment, a plurality of reinforcing ribs 128 are arranged on the bottom of the side wall of the mounting plate 120; and a plurality of horizontal reference lines 129 are arranged on the front end surface of the mounting plate 120. Specifically, in order to improve the stability of the multi-purpose rack 100, a plurality of reinforcing ribs 128 are arranged on the bottom of the mounting plate 120 to enhance the structural rigidity of the multi-purpose rack; a plurality of horizontal reference lines 129 are arranged on the front end surface of the mounting plate 120, and the reference lines 129 are arranged at equal intervals, so that the bottoms of the first container and the second container can be aligned by taking the reference lines 129 as reference lines; in addition, the reference lines are arranged to assist in observing the liquid level during the experiment, so that the experimental results can be observed conveniently.

[0029] In one embodiment, the water pumping component 200 is a water pump, which is fixedly installed inside the third container 126. Specifically, the water pumping component 200 is a water pump, which is in communication with an external power source, and is arranged inside the third container 126 to pump water in the third container 126 and deliver the water to the first container 124 through the second connecting pipe 330, so as to form a circulating water flow under the action of the water pump, simulate the current flow in the circuit, enable students to intuitively understand the working principle of the circuit, and enhance the experimental demonstration effect.

[0030] In one embodiment, the second fixing portion 122 is provided with a through hole, and the upper end of the second fixing portion 122 is provided with a support 1221. A plurality of clamping grooves 1222 are symmetrically arranged on both sides of the support 1221, and a fixing plate 1223 is arranged inside the support 1221. The fixing plate 1223 is clamped to the clamping grooves 1222 on both sides of the support 1221. The bottom of the fixing plate 1223 is provided with a connecting rope, and the bottom of the connecting rope passes through the through hole and is connected to the upper end of the second container 125. Specifically, a plurality of clamping grooves 1222 are arranged on both sides of the support 1221 fixed above the second fixing portion 122. The clamping grooves 1222 are arranged at equal intervals, and the clamping grooves 1222 on both sides are symmetrically arranged. The shapes of the two ends of the fixing plate 1223 correspond to the shapes of the clamping grooves 1222, so that the fixing plate 1223 is connected to the clamping grooves 1222. The bottom of the fixing plate 1223 is connected to the connecting rope, and the connection position is located directly above the through hole on the second fixing plate 1223. The connecting rope passes through the through hole and is firmly connected to the upper end of the second container 125. By connecting the fixing plate 1223 in the clamping grooves 1222 at different heights, the height of the second container 125 is adjusted, so that the height of the second container 125 can be adjusted in the experiment of exploring the relationship between hydraulic pressure and liquid mass, and whether the liquid levels in the first container and the second container remain consistent can be observed.

[0031] In one embodiment, the inner diameter of the third container 126 is greater than the inner diameter of the first container 124, and the inner diameter of the first container 124 is greater than the inner diameter of the second container 125. Specifically, the diameters of the third container 126, the first container 124, and the second container 125 decrease in turn. The diameter of the third container 126 is designed to be the largest to ensure that it can contain more water and meet the needs of water circulation. The second container 125 is smaller than the first container 124 to form an experimental system with different inner diameters, which facilitates the expansion of the same liquid, the experiment of the internal pressure of the liquid being irrelevant to the mass of the liquid, and the experiment of the internal pressure of the liquid being related to the density of the liquid.

[0032] In one embodiment, one end of the first connecting pipe 310 is connected to the bottom of the first container 124 through a quick release joint, and the other end is fixedly connected to the bottom of the second container 125; both ends of the first connecting pipe 310 are provided with a first valve 320. Specifically, the first connecting pipe 310 is a silica gel pipe, a quick release joint is arranged at the first end of the first connecting pipe 310 to realize quick connection and disconnection with the first container 124, the second end of the first connecting pipe 310 is fixedly connected to the bottom of the second container 125, and a first valve 320 is arranged at the position close to the end of the first connecting pipe 310 to control the flow of liquid in the first connecting pipe 310.

[0033] In one embodiment, the second connecting pipe 330 includes an upper pipe 331 and a lower pipe 332; one end of the upper pipe 331 is connected to the water outlet of the water pumping component 200, and the other end extends into the first container 124; one end of the lower pipe 332 is connected to the bottom of the third container 126, and the other end is connected to the bottom of the first container 124; a second valve 333 is arranged at the end of the lower pipe 332 close to the water pumping component 200, and a water flow indicator 334 is arranged in the middle of the lower pipe 332. Specifically, the second connecting pipe 330 is also a silica gel pipe, the first end of the upper pipe 331 is connected to the water outlet of the water pump arranged in the third container 126, the other end of the upper pipe 331 extends into the first container 124, water is pumped out of the third container 126 by the water pump and injected into the first container 124 through the upper pipe 331, the first end of the lower pipe 332 is fixedly connected to the bottom of the third container 126, and the other end is connected to the bottom of the first container 124, so that the water in the first container 124 flows back to the third container 126 through the lower pipe 332, forming a closed circulation system. A second valve 333 is arranged at the end of the lower pipe 332 close to the water pump to control the flow of liquid between the lower pipe and the third container; a water flow indicator 334 is arranged in the middle of the lower pipe 332 to directly display the flow of liquid in the lower pipe, facilitating observation of the direction and speed of water flow and improving the visibility of water circulation during the experiment.

[0034] In one embodiment, a fan 500 is arranged on the front end face of the mounting plate 120, and the fan 500 is arranged above the water flow indicator 334. Specifically, a fan 500 is arranged on the front end face of the mounting plate 120, the fan 500 is connected to an external circuit, and is used to assist in observing the display of the water flow indicator 334. In the water circuit analogy circuit experiment, the fan 500 simulates the electric appliance in the circuit, and by observing the speed of the fan 500, the relationship between the power supply and the electric appliance in the closed circuit is learned.

[0035] In one embodiment, the lifting mechanism 400 is a telescopic rod 410, which is composed of a plurality of rod bodies with gradually decreasing diameters; the outermost rod body is fixed to the rear wall of the mounting plate 120 through the buckle 127. Specifically, the lifting mechanism 400 is a telescopic rod 410, which is composed of a plurality of rod bodies with different diameters and is sequentially sleeved to realize the telescopic function; the outermost rod body is connected with the buckle 127 on the back of the mounting plate 120, so that the telescopic rod 410 is fixed to the back of the mounting plate 120; by adjusting the length of the telescopic rod 410, the height of the experimental device can be flexibly adjusted, and the height requirement of the Pascal bucket experiment can be conveniently realized. It is worth noting that the telescopic rod 410 is a general telescopic rod sold on the market, which is prior art and will not be described in detail here.

[0036] In one embodiment, the telescopic rod 410 is provided with a hook 420 at the top; a retractable rope is arranged along the length direction of the telescopic rod 410, and the upper end of the retractable rope is connected with a fourth container 430 through the hook 420; the bottom of the fourth container 430 is connected with one end of a long guide pipe 440, and the other end of the long guide pipe 440 is connected with a syringe 450 fixed to the upper end of the base 110. Specifically, the length of the retractable rope is greater than twice the length of the telescopic rod 410 when it is fully stretched, the retractable rope is arranged along the length direction of the telescopic rod 410, the upper end is fixedly connected with the fourth container 430 through the hook 420 arranged at the upper end of the telescopic rod 410, the bottom of the fourth container 430 is connected with the long guide pipe 440, and the other end of the long guide pipe 440 is connected with the injection port of the syringe 450 fixed to the upper end of the base 110; by pulling the retractable rope, the height of the fourth container 430 can be adjusted, and the operation of adding liquid to the fourth container 430 can be facilitated; a weight is placed at the push rod end of the syringe 450, liquid is added to the fourth container 430 and pulled up, the liquid flows into the syringe 450 and pushes the weight to move, and it is verified that the liquid internal pressure is related to the depth; the syringe 450 can also be replaced by a balloon or a mineral water bottle connected with the bottom of the long guide pipe 440 to reproduce the Pascal bucket experiment.

[0037] The general working process of the utility model is as follows: after the experimental device is assembled, the telescopic rod 410 is stretched, liquid is added to the fourth container 430, the container is raised by adjusting the retractable rope, a weight is placed at the push rod end of the syringe 450, and as the liquid flows into the syringe 450, the weight can be obviously pushed, which verifies the conclusion that the liquid internal pressure is related to the depth; the experimental phenomenon is intuitive, and students can easily understand and master it.

[0038] The diameter of the first container is larger than that of the second container, the first container 124 and the second container 125 are connected through the first connecting pipe 310 to form a communicating vessel, water is added into the first container 124 and the second container 125 respectively, and it is observed that the liquid levels are consistent, the fixed plate is fixed in the clamping groove at different heights to change the height of the second container 125, and it is observed that the liquid levels in the first container 124 and the second container 125 always remain consistent, so that the conclusion that the internal pressure of the liquid is irrelevant to the mass is obtained. The height in the second container 125 is adjusted, the bottoms of the first container 124 and the second container 125 are aligned with the reference line, that is, the heights of the bottoms of the two containers are the same, water is added into the first container 124 and concentrated brine is added into the second container 125, and the liquid levels in the two containers are observed, so that the conclusion that the internal pressure of the liquid is relevant to the density of the liquid at the same depth is obtained.

[0039] The first connecting pipe 310 is disconnected from the first container 124, the first container 124 and the third container 126 are connected through the lower guide pipe 332 in the second connecting pipe 330, and the water pump and the first container 124 are connected through the upper guide pipe 331, water is added into the third container 126, a pressure difference is formed in the first container and the third container, the second valve 333 is opened, and the water flow moving into the first container 124 through the lower guide pipe 332 is observed, and it is analogized that the formation of the electric current needs voltage, and the directional movement of the electric charge forms the electric current; the water circulates between the first container 124 and the third container 126 by opening the water pump, and the fan 500 is opened, and it is analogized that the power supply is a device for providing voltage in the circuit, and the necessary elements for the composition of the circuit include the power supply, the wire, the switch, and the electric appliance; and it can be analogized that the power supply is a device for converting other forms of energy into electric energy from the energy angle, and the power supply is a device for providing non-electrostatic force from the force angle, and the ability of the non-electrostatic force to do work is represented by the electromotive force. The rotation speed of the water flow indicator 334 is obviously accelerated by increasing the power of the water pump, and it is analogized that the electromotive force of different power supplies is different, and it is understood that the size of the electromotive force is irrelevant to the external circuit, but is determined by the material and structure of the power supply itself.

[0040] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A multifunctional physics experiment demonstration stand, characterized in that, include: Multi-purpose rack: It has a base and a mounting plate that is vertically fixed to the upper surface of the base; the upper part of the front end face of the mounting plate is provided with a first fixing part, a second fixing part and a third fixing part in sequence, and the rear side wall is provided with a plurality of buckles arranged in a vertical direction; Container assembly: includes a first container disposed on the first fixing part, a second container disposed on the second fixing part, and a third container disposed on the third fixing part; Pumping component: installed inside the third container; Connection mechanism: includes a first connecting pipe and a second connecting pipe; the two ends of the first connecting pipe are respectively connected to the bottom of the first container and the bottom of the second container; the two ends of the second connecting pipe are respectively connected to the bottom of the first container and the outlet of the pumping component. Lifting mechanism: connected to the buckle and fixed to the rear side wall of the mounting plate.

2. The multifunctional physics experiment demonstration stand according to claim 1, characterized in that, The bottom of the side wall of the mounting plate is provided with multiple reinforcing ribs; the front end face of the mounting plate is provided with multiple horizontal reference lines that are parallel to each other and equally spaced.

3. The multifunctional physics experiment demonstration stand according to claim 1, characterized in that, The pumping component is a water pump, which is fixedly installed inside the third container.

4. The multifunctional physics experiment demonstration stand according to claim 1, characterized in that, The second fixing part has a through hole, and the upper end of the second fixing part has a bracket; the bracket has multiple slots symmetrically arranged on both sides, and a fixing plate is provided inside the bracket. The two ends of the fixing plate are respectively engaged with the corresponding slots on both sides of the bracket; a connecting rope is provided at the bottom of the fixing plate, and the bottom of the connecting rope passes through the through hole and is connected to the upper end of the second container.

5. A multifunctional physics experiment demonstration stand according to claim 1, characterized in that, The inner diameter of the third container is larger than the inner diameter of the first container, and the inner diameter of the first container is larger than the inner diameter of the second container.

6. The multifunctional physics experiment demonstration stand according to claim 1, characterized in that, One end of the first connecting pipe is connected to the bottom of the first container via a quick-release connector, and the other end is fixedly connected to the bottom of the second container; both ends of the first connecting pipe are equipped with a first valve.

7. The multifunctional physics experiment demonstration stand according to claim 1, characterized in that, The second connecting pipe includes an upper conduit and a lower conduit; one end of the upper conduit is connected to the outlet of the pumping component, and the other end extends into the inside of the first container; one end of the lower conduit is connected to the bottom of the third container, and the other end is connected to the bottom of the first container; a second valve is provided at the end of the lower conduit near the pumping component, and a water flow indicator is provided in the middle of the lower conduit.

8. A multifunctional physics experiment demonstration stand according to claim 7, characterized in that, The front end of the mounting plate is equipped with a fan, which is positioned above the water flow indicator.

9. A multifunctional physics experiment demonstration stand according to claim 1, characterized in that, The lifting mechanism is a telescopic rod, which is composed of multiple rods with successively decreasing diameters connected together; the outermost rod is fixed to the rear side wall of the mounting plate by the buckle.

10. A multifunctional physics experiment demonstration stand according to claim 9, characterized in that, The telescopic rod is provided with a hook at the top; a retractable rope is provided along the length of the telescopic rod, and the upper end of the retractable rope is connected to a fourth container after passing around the hook; one end of a long tube is connected to the bottom of the fourth container, and the other end of the long tube is connected to a syringe fixed to the upper end of the base.

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