Safety experiment device for physics teaching

Abstract

The invention discloses a safety experiment device for physics teaching, and particularly relates to the technical field of teaching equipment.The safety experiment device comprises a storage cylinder and a U-shaped frame located in the storage cylinder, a telescopic mechanism is arranged between the U-shaped frame and the storage cylinder, a rotating wheel is rotationally installed in the middle of the top of the U-shaped frame through a bearing, and a stud is fixedly arranged at the bottom of the rotating wheel; a lifting frame sleeves the peripheral surface of the stud in a threaded mode, an article processing mechanism is arranged at the end, away from the stud, of the lifting frame, a clamping mechanism is arranged at the position, corresponding to the article processing mechanism, of the bottom end face of the inner side of the U-shaped frame, an alcohol lamp is clamped to the clamping mechanism, and two connecting rods which are vertically arranged in parallel are fixedly connected to the top end face of the inner side of the U-shaped frame; and a fixed plate is fixedly arranged between the bottom end surfaces of the two connecting rods. According to the experimental device, experimental articles can be prevented from bursting after being heated, waste gas generated in the heating process is collected and treated, and the experimental device can be stored in the storage barrel for protection when not used.

Description

Technical Field

[0001] This invention relates to the field of teaching equipment technology, and more specifically, to a safe experimental device for physics teaching. Background Technology

[0002] Physics is the discipline that studies the most general laws of motion and the fundamental structure of matter. As a leading discipline in natural science, physics studies the most basic forms and laws of motion of all matter, from the universe to elementary particles, thus becoming the foundation for research in other natural sciences. Its theoretical structure fully utilizes mathematics as its working language and uses experiments as the sole criterion for verifying the correctness of theories; it is the most precise natural science discipline today.

[0003] Experimentation is one of the fundamental methods of scientific research. Based on the purpose of scientific research, it involves minimizing external influences, highlighting key factors, and utilizing specialized instruments and equipment to artificially alter, control, or simulate the research object, causing certain things (or processes) to occur or be reproduced, thereby gaining an understanding of natural phenomena, natural properties, and natural laws.

[0004] Currently, experiments are frequently used in physics teaching to deepen students' understanding and memory of classroom content and improve learning outcomes. However, in existing technologies, during the process of heating different experimental objects to observe their physical changes, some objects may burst due to heat, potentially producing toxic gases, which could pose health risks to experimenters. Furthermore, the experimental apparatus cannot be properly stored and protected when not in use.

[0005] The information disclosed in the background section is only intended to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] To overcome the aforementioned deficiencies of the prior art, embodiments of the present invention provide a safe experimental device for physics teaching. By utilizing a telescopic mechanism, the experimental device is stored inside a storage cylinder when not in use. When in use, an item handling mechanism drives the experimental items for rolling heating and waste gas collection and treatment. A fixed plate is used to prevent waste gas leakage and the experimental items from bursting due to heat, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a safe experimental device for physics teaching, comprising a storage cylinder and a U-shaped frame located inside the storage cylinder. A telescopic mechanism is provided between the U-shaped frame and the storage cylinder. A rotating wheel is rotatably mounted on the top center of the U-shaped frame via a bearing. A stud is fixedly provided at the bottom of the rotating wheel, and the bottom end of the stud is rotatably mounted to the inner bottom surface of the U-shaped frame via a bearing. A lifting frame is threaded onto the outer circumference of the stud. An item handling mechanism is provided at the end of the lifting frame away from the stud. A locking mechanism is provided on the inner bottom surface of the U-shaped frame at the position corresponding to the item handling mechanism. An alcohol lamp is locked onto the locking mechanism. Two vertically parallel connecting rods are fixedly connected on the inner top surface of the U-shaped frame at the position corresponding to the item handling mechanism, and a fixed plate is fixed between the bottom surfaces of the two connecting rods.

[0008] The advantage of adopting the above-mentioned further scheme is that it can form a highly safe experimental device.

[0009] In a preferred embodiment, a slider is fixedly provided at one end of the lifting frame facing the middle of the inner side of the U-shaped frame, and a groove is provided in the middle of the inner side of the lifting frame, with the slider slidably connected to the inside of the groove.

[0010] The beneficial effect of adopting the above-mentioned further solution is that it can ensure that the lifting frame moves up and down stably.

[0011] In a preferred embodiment, the article handling mechanism comprises an article shaking component and a gas handling component. The article shaking component includes a drive motor fixedly installed on the outside of the lifting frame and a support frame disposed on the inside of the lifting frame. On one opposite side of the inner cavity of the lifting frame, rotating rods are rotatably mounted via bearings, and on the other opposite side, arc-shaped guide grooves are opened. An inclined connecting block is fixedly connected to one end of each of the two rotating rods. A round rod is rotatably mounted between the inner side of one end of each of the two connecting blocks and the outer surface of the support frame. Straight plates are fixedly provided on the outer periphery of the support frame at positions corresponding to the two guide grooves. A sphere is fixedly connected to one opposite end of each of the two straight plates, and the sphere is slidably connected inside the corresponding guide groove. The gas handling component includes a component opened in the inner cavity of the lifting frame near... Two grooves on one side of the stud, each groove has a sealing plate fixedly installed at its opening end and a piston inside. A metal shaped hose is movably inserted through the center of each of the two sealing plates, and a sealing ring is fixedly installed on the inner circumference of the perforation through which the metal shaped hose passes on the sealing plate. Both ends of the metal shaped hose are fixedly fitted with a rolling piston and a sphere on the opposite side surface of the straight plate. An air inlet pipe is fixedly inserted through the edge of each of the two sealing plates, and a one-way valve is installed on each of the two air inlet pipes. A slot is inserted through the top of each of the two grooves near the opening end. An exhaust gas treatment box with an open bottom is fixedly installed at the top of the lifting frame corresponding to the two slots. A baffle is hinged to the top of the lifting frame corresponding to the two slots. An exhaust pipe is connected to the top of each of the two exhaust gas treatment boxes.

[0012] The beneficial effects of adopting the above-mentioned further scheme are: it can realize the rolling heating of experimental items and the collection and treatment of waste gas.

[0013] In a preferred embodiment, a clamping member is also provided on the peripheral side of the support frame. The clamping member includes four screws that are threaded through the support frame. A turntable is fixed at one end of each screw away from the center point of the support frame, and a clamping plate is rotatably installed at the other end of each screw near the center point of the support frame via a bearing.

[0014] The advantage of adopting the above-mentioned further solution is that it can be applied to clamping heated vessels of different specifications.

[0015] In a preferred embodiment, the positioning mechanism includes a sinking groove located in the middle of the inner bottom of the U-shaped frame. A plurality of brackets evenly distributed in a ring are fixedly provided at the bottom of the inner cavity of the sinking groove. Each bracket has an L-shaped swing plate rotatably mounted on its top end and is inclined. A spring is fixedly connected between the bottom of the end of each L-shaped swing plate near the center of the sinking groove and the bottom end face of the inner cavity of the sinking groove at that location.

[0016] The beneficial effect of adopting the above-mentioned further solution is that the position of the alcohol lamp can be clamped and limited.

[0017] In a preferred embodiment, the telescopic mechanism includes slots located in the middle of one opposite side of the inner cavity of the storage tube. A cover is movably inserted into each slot. The cover consists of a hinged vertical section and a swing section. Multiple vertically collinear toothed blocks are fixedly arranged at both ends of the vertical and swing sections of one of the covers. Through slots are provided on the inner wall of the storage tube corresponding to the positions of the two sets of toothed blocks. Multiple vertically collinear toothed blocks are fixedly arranged at the positions of the toothed blocks on the cover corresponding to the middle of the outer side of the U-shaped frame. A gear is rotatably mounted on the inner side of the storage tube between the opposing toothed blocks and the toothed blocks. The gear meshes with both the toothed blocks and the toothed blocks.

[0018] The advantage of adopting the above-mentioned further solution is that the experimental device can be stored inside the storage tube when it is not in use.

[0019] In a preferred embodiment, the ends of the two caps' swaying sections away from the vertical sections are both inclined, and magnetic strips are fixedly embedded on their inclined end faces. The magnetic properties of the two magnetic strips are opposite. A handle is fixedly provided at the middle of the outer side of the ends of the two caps' swaying sections away from the vertical sections. A guide block is fixedly provided at the center of both ends of the two vertical sections. A limiting groove is opened at both ends of the inner cavity of the two slots, and the guide block is slidably connected to the limiting groove at the corresponding position.

[0020] The beneficial effect of adopting the above-mentioned further solution is that it can make the cap fastened and facilitate the lifting and fastening of the cap.

[0021] In a preferred embodiment, the side of the fixed plate facing the lifting frame is fixedly covered with a sealing gasket.

[0022] The beneficial effect of adopting the above-mentioned further solution is that it can improve the sealing performance after the fixed plate and the lifting frame come into contact.

[0023] The technical effects and advantages of this invention are as follows:

[0024] 1. This invention, by setting up an article processing mechanism composed of an article shaking component and a gas processing component, can use a working drive motor to drive the experimental article to perform rolling heating and waste gas collection and treatment, and is supplemented by a fixed plate to prevent waste gas leakage and the experimental article from bursting due to heat, which greatly improves the safety of experimental operation, and the structure is ingeniously designed.

[0025] 2. By setting up a telescopic mechanism, the present invention can lift the cover upward along the slot after the experiment is completed, and drive the gear to rotate in the forward direction. The gear rotating in the forward direction will drive the U-shaped frame to sink into the storage tube for non-use protection.

[0026] 3. By setting up a locking mechanism, the present invention can use the gravity of the alcohol lamp itself to press the bottom of the L-shaped pendulum downwards, while compressing the spring. Meanwhile, the top of the L-shaped pendulum moves closer to the alcohol lamp and fits against its surface, which can prevent the alcohol lamp from shifting during the experiment and causing uneven heating. Attached Figure Description

[0027] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the present invention. The embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 This is a partial top sectional view of the present invention.

[0030] Figure 3 This is a partial side sectional view of the present invention.

[0031] Figure 4 This is a schematic diagram of the positioning mechanism of the present invention.

[0032] Figure 5 This is a schematic diagram of the storage tube structure of the present invention.

[0033] Figure 6 This is a schematic diagram of the U-shaped frame structure of the present invention.

[0034] Figure 7 This is a schematic diagram of the sealing structure of the present invention.

[0035] The attached diagram is labeled as follows: 1. Storage tube, 2. U-shaped frame, 3. Telescopic mechanism, 31. Slot, 32. Cover, 33. Tooth block one, 34. Tooth block two, 35. Through slot, 36. Gear, 4. Alcohol lamp, 5. Locking mechanism, 51. Sinking groove, 52. Bracket, 53. L-shaped swing plate, 54. Spring, 6. Rotary wheel, 7. Stud, 8. Lifting frame, 9. Item handling mechanism, 91. Drive motor, 92. Bearing frame, 93. Connecting block, 94. Rotating rod, 95. Guide groove, 96. Straight plate, 97. Sphere one, 98. Groove, 99. Sealing plate, 910. Piston, 911. Metal shaping hose, 912. Sphere two, 913. Air inlet pipe, 914. Clamping piece, 915. Slot, 916. Exhaust gas treatment box, 917. Baffle, 918. Air outlet pipe, 10. Connecting rod, 11. Fixed plate, 12. Sealing gasket, 13. Handle, 14. Magnetic strip, 15. Guide block. Detailed Implementation

[0036] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this disclosure will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art. The drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0037] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more exemplary embodiments. Numerous specific details are provided in the following description to give a full understanding of exemplary embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced with one or more of the specific details omitted, or other methods, components, steps, etc., can be employed. In other instances, well-known structures, methods, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0038] Example 1

[0039] Refer to the instruction manual appendix Figure 1 An embodiment of the present invention provides a safe experimental device for physics teaching, comprising a storage cylinder 1 and a U-shaped frame 2 located inside the storage cylinder 1. A telescopic mechanism 3 is provided between the U-shaped frame 2 and the storage cylinder 1. A rotating wheel 6 is rotatably mounted on the top center of the U-shaped frame 2 via a bearing. A stud 7 is fixedly provided at the bottom of the rotating wheel 6, and the bottom end of the stud 7 is rotatably mounted to the inner bottom surface of the U-shaped frame via a bearing. A lifting frame 8 is threaded onto the outer circumference of the stud 7. An item handling mechanism 9 is provided at the end of the lifting frame 8 away from the stud 7. The inner bottom surface of the U-shaped frame 2 is aligned with... A locking mechanism 5 is provided at the position of the item handling mechanism 9, and an alcohol lamp 4 is locked onto the locking mechanism 5. Two vertically parallel connecting rods 10 are fixedly connected to the top inner side of the U-shaped frame 2 at the position corresponding to the item handling mechanism 9, and a fixed plate 11 is fixed between the bottom ends of the two connecting rods 10. A slider is fixedly provided at the end of the lifting frame 8 facing the middle of the inner side of the U-shaped frame 2. A sliding groove is opened in the middle of the inner side of the lifting frame 8, and the slider slides into the groove. A sealing gasket 12 is fixedly covered on the side of the fixed plate 11 facing the lifting frame 8.

[0040] It should be noted that during the heating process of the experimental sample, the container containing the experimental sample is first placed in the heating zone. Then, the rotating wheel 6 is rotated to drive the stud 7 to rotate, thereby raising the lifting frame 8 to contact the fixed plate 11, and making the sealing gasket 12 and the upper surface of the lifting frame 8 in a pressing contact setting. Next, the alcohol lamp 4 is placed directly below the container containing the experimental sample through the locking mechanism 5. Then, the alcohol lamp is lit, and the item handling mechanism 9 is activated to drive the experimental item to undergo rolling heating and waste gas collection and treatment. The fixed plate 11 is used to prevent waste gas leakage and the experimental sample from bursting due to heat, which can greatly improve the safety of the experimental operation. The structure is ingeniously designed. After the experiment is completed, the telescopic mechanism 3 can be used to control the experimental device to be stored inside the storage cylinder 1 for protection when not in use.

[0041] Example 2

[0042] Refer to the instruction manual appendix Figure 1-3 According to an embodiment of the present invention, a safe experimental device for physics teaching includes an item handling mechanism 9 composed of an item shaking component and a gas handling component. The item shaking component includes a drive motor 91 fixedly installed on the outside of a lifting frame 8 and a support frame 92 disposed on the inside of the lifting frame 8. Two rotating rods 94 are rotatably mounted on opposite sides of the inner cavity of the lifting frame 8 via bearings, and two guide grooves 95 with arc-shaped structures are opened on the other opposite side. Two connecting blocks 93 are fixedly connected to opposite ends of the two rotating rods 94, and round rods are rotatably mounted between the inner sides of opposite ends of the two connecting blocks 93 and the outer surface of the support frame 92. Straight plates 96 are fixedly provided on the outer periphery of the support frame 92 at positions corresponding to the two guide grooves 95. Two spheres 97 are fixedly connected to opposite ends of the two straight plates 96, and the spheres 97 are slidably connected inside the corresponding guide grooves 95. The gas handling component includes two grooves 98 opened in the inner cavity of the lifting frame 8 near the stud 7. The opening ends of the two grooves 98 are fixed... The device includes a sealing plate 99 and a piston 910 inside. A metal flexible tube 911 is movably inserted through the center of each sealing plate 99, allowing for bending at a certain angle. This ensures unimpeded movement of the piston 910 and the swinging motion of the straight plate 96. A sealing ring is fixed to the inner circumference of the perforation through which the metal flexible tube 911 passes on the sealing plate 99. Both ends of the metal flexible tube 911 are fixed with spherical balls that are rolled and embedded on the opposite side surfaces of the piston 910 and the straight plate 96. 12. An air inlet pipe 913 is fixedly installed through the edge of each of the two sealing plates 99. A one-way valve is installed on each of the two air inlet pipes 913. A slot 915 is installed through the top of each of the two grooves 98 near the opening end. An exhaust gas treatment box 916 with an open bottom is fixedly installed at the top of the lifting frame 8 corresponding to the position of the two slots 915. A baffle 917 is hinged at the top of the lifting frame 8 corresponding to the position of the two slots 915. An exhaust pipe 918 is connected to the top of each of the two exhaust gas treatment boxes 916.

[0043] Furthermore, a clamping element 914 is provided on the peripheral side of the support frame 92. The clamping element 914 includes four screws that are threaded through and sleeved on the peripheral side of the support frame 92. A turntable is fixed at one end of each screw away from the center point of the support frame 92, and a clamping plate is rotatably installed at the other end of each screw near the center point of the support frame 92 via a bearing. After placing the container containing the experimental items inside the support frame 92, the turntable is turned to drive the screws to rotate, so that the clamping plate gradually approaches the container until it is fully clamped. This is suitable for clamping heated containers of different sizes.

[0044] It should be noted that the output shaft end of the drive motor 91 is fixedly connected to the rotating rod 94 at its location. During the heating of the experimental object, rotating rods 94 are rotatably mounted on both opposite sides of one of the inner cavities of the lifting frame 8 via bearings. Each of the two rotating rods 94 has an inclined connecting block 93 fixedly connected to one opposite end. A round rod is rotatably mounted between the inner side of one opposite end of the two connecting blocks 93 and the outer surface of the support frame 92. Therefore, when the drive motor 91 is started to drive the rotating rod 94 at its location to rotate, it will drive the connecting block at that location. 93 makes a circular motion, which causes the supporting frame 92 to shake, and in turn causes the container containing the experimental items to shake synchronously. This allows the container holding the experimental items to be heated quickly and evenly, and also allows the experimental items to roll continuously inside the container to achieve all-round heating. During this process, as the supporting frame 92 shakes, it drives the spheres 97 at opposite ends of the two straight plates 96 to slide back and forth in the guide grooves 95 at corresponding positions. Since the centers of the two sealing plates 99 are both movably connected to metal shaping hoses 911, and both ends of the metal shaping hoses 911... Both are fixedly equipped with a rolling piston 910 and a ball 912 on the opposite side surface of the straight plate 96. When the straight plate 96 swings, it will alternately drive the two pistons 910 to reciprocate inside the groove 98 at their respective positions. When the piston 910 moves away from the sealing plate 99 at its respective position, it will create a negative pressure in the cavity of the groove 98 at its respective position, thereby tightly sucking the baffle 99 to the top surface of the lifting frame 8. At the same time, the toxic gas generated during the heating of the experimental items will enter the groove 98 through the air inlet pipe 913 at its respective position. Inside the groove 98, when the piston 910 moves toward the end of the sealing plate 99, the one-way valve on the air inlet pipe 913 prevents the toxic gas sucked into the groove 98 from being discharged from the air inlet pipe 913 again. This causes the moving piston 910 to compress the space inside the groove 98, so that the baffle 917 is pushed open by the air pressure. The toxic gas inside the groove 98 is then discharged through the slot 915 to the corresponding exhaust gas treatment box 916 for treatment, and then discharged into the external environment through the exhaust pipe 918.

[0045] Example 3

[0046] Refer to the instruction manual appendix Figure 1 and Figure 4 According to an embodiment of the present invention, a safe experimental device for physics teaching is provided. The positioning mechanism 5 includes a sink 51 located in the middle of the bottom of the inner side of the U-shaped frame 2. A plurality of brackets 52 are fixedly arranged in a ring at the bottom of the inner cavity of the sink 51. An L-shaped swing plate 53 is rotatably installed at the top of each bracket 52. A spring 54 is fixedly connected between the bottom of the end of each L-shaped swing plate 53 near the center of the sink 51 and the bottom surface of the inner cavity of the sink 51 at the location.

[0047] It should be noted that when the spring 54 is in its natural state, the L-shaped pendulum 53 is tilted. During the clamping and limiting of the alcohol lamp 4, the alcohol lamp 4 is directly placed into the sink 51, and its own weight is used to press the bottom of the L-shaped pendulum 53 downward, while compressing the spring 54. The top of the L-shaped pendulum 53 moves closer to the alcohol lamp 4 and fits against its surface, which can effectively prevent the alcohol lamp 4 from shifting during the experiment and causing uneven heating.

[0048] Example 4

[0049] Refer to the instruction manual appendix Figure 1 and Figure 5-7 According to an embodiment of the present invention, a safe experimental device for physics teaching is provided. The telescopic mechanism 3 includes a slot 31 located in the middle of one opposite side of the inner cavity of the storage cylinder 1. A cover 32 is movably inserted into both slots 31. The cover 32 is composed of a vertical section and a swing section that are hinged together. Multiple teeth blocks 33 are fixedly arranged vertically and collinearly at both ends of the inner side of the vertical section and the swing section of one of the cover 32. A through groove 35 is provided on the inner wall of the storage cylinder 1 at the position corresponding to the two sets of teeth blocks 33. Multiple teeth blocks 34 are fixedly arranged vertically and collinearly at the position of the teeth blocks 33 on the cover 32 at the middle of the outer side of the U-shaped frame 2. A gear 36 is rotatably installed on the inner side of the storage cylinder 1 at the position between the opposite teeth blocks 33 and teeth blocks 34. The gear 36 is meshed with both the teeth blocks 33 and the teeth blocks 34.

[0050] It should be noted that after the experiment is completed, the cover 32 can be lifted upward along the slot 31. Since the gear 36 is meshed with the first gear block 33 and the second gear block 34, the gear 36 will be driven to rotate in the forward direction during the upward lifting of the cover 32. The forward rotating gear 36 will drive the U-shaped frame 2 to sink into the storage tube 1 for non-use protection. Conversely, when in use, simply flip the sway section of the cover 32 to be collinear with the vertical section, and then sink the cover 32 into the slot 31 to push out the U-shaped frame. The operation is convenient and quick.

[0051] In this embodiment, the ends of the two caps 32 that are swaying away from the vertical segments are both inclined, and magnetic strips 14 are fixedly embedded on their inclined end faces. The magnetic properties of the two magnetic strips 14 are opposite. A handle 13 is fixedly provided at the middle of the outer side of the ends of the two caps 32 that are swaying away from the vertical segments. Guide blocks 15 are fixedly provided at the center of both ends of the two vertical segments. Restriction grooves are opened at both ends of the inner cavities of the two slots 31, and the guide blocks 15 are slidably connected to the corresponding restriction grooves. When the experimental device is submerged inside the storage tube 1 for protection, the two caps 32 are fastened together by two magnetic strips of opposite polarity, which improves the stability of the caps 32. The handle 13 allows the caps 32 to be lifted easily after they are submerged in the slot 31. In addition, the guide block 15 on the vertical section of the caps 32 and the limiting groove inside the slot 31 limit the removal of the caps 32, preventing the caps 32 from being completely removed from the slot 31.

[0052] In the above technical solutions, the circuits, electronic components and control modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated. The content to be protected by this invention does not involve any improvement to the software and methods.

[0053] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

[0054] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0055] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0056] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A safe experimental device for physics teaching, characterized in that: The device includes a storage tube (1) and a U-shaped frame (2) located inside the storage tube (1). A telescopic mechanism (3) is provided between the U-shaped frame (2) and the storage tube (1). A rotating wheel (6) is rotatably mounted on the top center of the U-shaped frame (2) via a bearing. A stud (7) is fixedly provided at the bottom of the rotating wheel (6), and the bottom end of the stud (7) is rotatably mounted to the inner bottom surface of the U-shaped frame via a bearing. A lifting frame (8) is threaded onto the outer circumference of the stud (7). The lifting frame (8) is located at a distance from the storage tube (1). An item handling mechanism (9) is provided at one end away from the stud (7). A locking mechanism (5) is provided on the inner bottom surface of the U-shaped frame (2) at the position corresponding to the item handling mechanism (9). An alcohol lamp (4) is locked on the locking mechanism (5). Two vertically parallel connecting rods (10) are fixedly connected on the inner top surface of the U-shaped frame (2) at the position corresponding to the item handling mechanism (9), and a fixed plate (11) is fixed between the bottom surfaces of the two connecting rods (10).

2. The safe experimental device for physics teaching according to claim 1, characterized in that: The lifting frame (8) has a slider fixed at one end facing the middle of the inner side of the U-shaped frame (2). The lifting frame (8) has a groove in the middle of the inner side, and the slider slides into the groove.

3. The safe experimental device for physics teaching according to claim 1, characterized in that: The article handling mechanism (9) consists of an article shaking component and a gas handling component. The article shaking component includes a drive motor (91) fixedly installed on the outside of the lifting frame (8) and a bearing frame (92) set inside the lifting frame (8). On one opposite side of the inner cavity of the lifting frame (8), rotating rods (94) are rotatably mounted via bearings, and on the other opposite side, there are arc-shaped guide grooves (95). Each of the two rotating rods (94) has an inclined connecting block (93) fixedly connected to one end of each opposite rod. A round rod is rotatably mounted between the inner side of one end of the connecting block (93) and the outer surface of the bearing frame (92). Straight plates (96) are fixedly provided at positions corresponding to the two guide grooves (95) on the outer periphery of the bearing frame (92). A sphere (97) is fixedly connected to one of the opposite ends of the two straight plates (96), and the sphere (97) is slidably connected inside the corresponding guide groove (95). The gas treatment assembly includes two grooves (98) opened in the inner cavity of the lifting frame (8) near the stud (7). The two grooves (98)... Both openings are fixedly equipped with sealing plates (99) and pistons (910) inside. Metal shaped hoses (911) are movably inserted through the center of each of the two sealing plates (99). Sealing rings are fixedly installed on the inner circumferential surface of the perforations of the metal shaped hoses (911) on the sealing plates (99). Both ends of the metal shaped hoses (911) are fixedly fitted with spherical balls (912) on the opposite side surfaces of the pistons (910) and the straight plate (96). The edges of both sealing plates (99) are fixedly connected... An air inlet pipe (913) is provided, and a one-way valve is installed on each of the two air inlet pipes (913). The top of the two grooves (98) near the opening end is provided with a slot (915). The top of the lifting frame (8) is fixed with an exhaust gas treatment box (916) with an open bottom at the position corresponding to the two slots (915). The top of the lifting frame (8) is hinged with a baffle (917) at the position corresponding to the two slots (915). The top of the two exhaust gas treatment boxes (916) is connected with an exhaust pipe (918).

4. A safe experimental device for physics teaching according to claim 3, characterized in that: The bearing frame (92) is also provided with a clamping member (914). The clamping member (914) includes four screws that are threaded through and sleeved on the peripheral side of the bearing frame (92). The end of each screw away from the center point of the bearing frame (92) is fixed with a turntable, and the end near the center point of the bearing frame (92) is rotatably mounted with a clamping plate through a bearing.

5. A safe experimental device for physics teaching according to claim 1, characterized in that: The positioning mechanism (5) includes a sinkhole (51) located in the middle of the bottom of the inner side of the U-shaped frame (2). Multiple brackets (52) are fixedly arranged in a ring at the bottom of the inner cavity of the sinkhole (51). Each bracket (52) has an L-shaped swing plate (53) rotatably installed at its top. A spring (54) is fixedly connected between the bottom of the end of each L-shaped swing plate (53) near the center of the sinkhole (51) and the bottom surface of the inner cavity of the sinkhole (51) at that location.

6. A safe experimental device for physics teaching according to claim 1, characterized in that: The telescopic mechanism (3) includes a slot (31) located in the middle of one opposite side of the inner cavity of the storage tube (1). A cover (32) is movably inserted into each of the two slots (31). The cover (32) consists of a hinged vertical section and a swing section. Multiple vertically collinear toothed blocks (33) are fixedly arranged at both ends of the vertical and swing sections of one of the cover (32). The positions of the two sets of toothed blocks (33) on the inner wall of the storage tube (1) correspond to the positions of the inner walls of the storage tube (1). Each part is provided with a through groove (35). At the position of the toothed block one (33) on the cover (32) at the middle of the outer side of the U-shaped frame (2), a number of toothed blocks two (34) are fixedly arranged vertically and collinearly. A gear (36) is rotatably installed on the inner side of the storage tube (1) at the position between the toothed blocks one (33) and toothed blocks two (34) arranged opposite to each other. The gear (36) is meshed with both the toothed blocks one (33) and the toothed blocks two (34).

7. A safe experimental device for physics teaching according to claim 6, characterized in that: The two caps (32) are inclined at the end of the vertical section away from their respective positions, and magnetic strips (14) are fixedly embedded on their inclined end faces. The magnetic properties of the two magnetic strips (14) are opposite. A handle (13) is fixedly provided at the middle of the outer side of the end of the vertical section away from its respective position of the two caps (32). A guide block (15) is fixedly provided at the center of both ends of the two vertical sections. A limiting groove is opened at both ends of the inner cavity of the two slots (31), and the guide block (15) is slidably connected to the limiting groove at the corresponding position.

8. A safe experimental device for physics teaching according to claim 1, characterized in that: The side of the fixed plate (11) facing the lifting frame (8) is fixedly covered with a sealing gasket (12).

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