Biological experiment protection device for biological teaching

Abstract

The application relates to the technical field of biological experimental equipment, in particular to a biological experimental protection device for biological teaching, which comprises a base, a workbench fixedly installed on the base, and an installation assembly fixedly installed on the base and used for installing equipment to be disinfected; through the setting of the placing plate and the special-shaped clamping piece, the alcohol lamp is supported and released through the contraction movement of the electric push rod; the special-shaped clamping piece continuously applies clamping force to the alcohol lamp bottle body under the action of the first spring, so that the alcohol lamp is prevented from moving along with the placing plate, and after the placing plate is pushed back to the original position by the electric push rod, an shielding area is formed above the burning alcohol lamp, so that the burning alcohol lamp is intercepted, and damage of the alcohol lamp to other surrounding articles during splashing is effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of biological experimental equipment technology, and in particular to a biological experimental protective device for biological teaching. Background Technology

[0002] Alcohol lamps are one of the commonly used experimental instruments in biology teaching. They are mainly used to heat, sterilize, or ignite other items. Since they do not produce smoke during combustion, they can also be used to sterilize instruments by burning them. In addition, the heat generated during the combustion of alcohol lamps can be used to heat other experimental materials.

[0003] Alcohol lamps are commonly used sterilization tools on workbenches in biological laboratories, but their use poses a high fire risk. First, alcohol lamps are prone to wick splashing, especially when the wick is too short or burns incompletely. Workbenches typically contain a large amount of flammable experimental equipment and reagents, and splashed alcohol or flames can easily ignite a fire. Second, both too much and too little alcohol in the lamp can be dangerous. Too much alcohol can cause the vapors to expand rapidly and overflow after ignition, potentially leading to an explosion; too little alcohol can cause a mixture of alcohol vapor and air to accumulate inside the lamp, which can also result in a deflagration upon ignition. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a biological experimental protection device for biological teaching.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a biological experimental protective device for biological teaching, comprising a base, a workbench fixedly installed on the base, an installation component fixedly installed on the base, the installation component being used to install the equipment to be disinfected, a plurality of top rods fixedly installed on the base, the ends of all the top rods being fixedly connected to a baffle box, the baffle box containing a shielding and placing component and a clamping component, the shielding and placing component providing a support point for an alcohol lamp, the clamping component limiting the alcohol lamp, and a receiving component at the bottom of the baffle box. During the process of the shielding and placing component releasing its support for the alcohol lamp, the clamping component will release its limiting effect on the alcohol lamp, causing the alcohol lamp to fall into the receiving component when it ignites.

[0006] Preferably, the shielding placement assembly includes an electric push rod, the fixed part of which is fixedly installed on the outer wall of the shield box, and the telescopic end of which passes through the shield box and is fixedly connected to a placement plate, the placement plate being slidably connected to the inside of the shield box.

[0007] Preferably, the clamping assembly includes a push column and a slide rod. The push column is fixedly connected to the placement plate, the slide rod is slidably connected to the side wall of the baffle, and an irregularly shaped clamping member is fixedly connected to the end of the slide rod. A first spring is fixedly connected between the irregularly shaped clamping member and the baffle, the first spring is sleeved on the outer wall of the slide rod, and a hanging column is fixedly connected to the side wall of the irregularly shaped clamping member.

[0008] Preferably, the receiving assembly includes an L-shaped frame and a receiving box. The L-shaped frame is fixedly connected to the outer wall of the slide rod. A baffle is fixedly connected to the side wall of the receiving box. The receiving box is located below the baffle. A telescopic rod is fixedly connected to the bottom of the baffle. The telescopic rod is fixedly connected to the baffle. The L-shaped frame cooperates with the baffle.

[0009] Preferably, the base has a storage slot, the receiving box has a buffer component inside, a circular plate is provided above the buffer component, a through rod is fixedly connected to the side of the circular plate away from the buffer component, one end of the through rod passes through the receiving box and is fixedly connected to a receiving seat, the receiving seat is fixedly connected to the inner wall of the receiving box, the top of the receiving seat has a receiving groove, and a protective pad is fixedly connected inside the receiving groove.

[0010] Preferably, the mitigation assembly includes an elastic telescopic rod, the telescopic end of which is fixedly connected to a mitigation disc, and the circular plate is located on the mitigation disc.

[0011] Preferably, a dry powder bag is fixedly installed at the bottom of the placement plate, and a trigger switch is fixedly installed on the slowing plate.

[0012] Preferably, a support rod is fixedly connected inside the storage slot, and a circular box is fixedly connected to the end of the support rod after passing through the circular plate. The circular box is slidably connected to the through rod, and a fan is fixedly connected to the bottom of the circular box. A sliding groove is opened at the bottom of the receiving box, and the circular box is located at the bottom of the sliding groove. Multiple suction pipes are fixedly connected to the top of the circular box, and the receiving seat and protective pad have through holes equal in number to the number of suction pipes.

[0013] Preferably, a sliding rod is fixedly connected to the protective pad, and a baffle is fixedly connected to the end of the sliding rod away from the protective pad. The baffle is located directly above the through hole, and an air suction groove is formed on the outer wall of the air suction pipe.

[0014] Preferably, a cutter is slidably connected to the receiving box, the cutter has a slot, a connecting plate is fixedly connected to the cutter, a second spring is fixedly connected between the connecting plate and the receiving box, and a shield is fixedly connected to the baffle box, the shield cooperating with the connecting plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] I. This invention, through the arrangement of a placement plate and a shaped clamping component, uses the retraction movement of an electric push rod to release the alcohol lamp from its support. As the placement plates move away from each other, the shaped clamping component, under the action of a first spring, continuously applies clamping force to the alcohol lamp bottle, thus preventing the alcohol lamp from moving with the placement plate. After the alcohol lamp falls into the receiving box and continues to move downwards with it, the electric push rod is activated again, quickly pushing the placement plate back to its original position. After both placement plates return to their original positions, a shielding area is formed above the burning alcohol lamp. At this time, the returned placement plates can intercept the burning alcohol lamp, effectively preventing damage to surrounding items when the alcohol lamp splashes.

[0017] Second, this invention uses a dry powder bag. After the alcohol lamp enters the receiving box, a trigger switch will automatically release the dry powder bag. The trigger switch can be a pressure sensor. When the pressure reaches a specified range, the dry powder bag will be released, thereby extinguishing the burning alcohol lamp.

[0018] Third, the present invention, through the setting of the suction pipe, draws air at the bottom of the receiving seat, thereby creating a negative pressure space, which allows the sprayed dry powder to flow through the through hole, thereby making the dry powder evenly distributed and helping to prevent the occurrence of processing dead corners. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the protective device of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the present invention along the cross-section of the baffle box.

[0021] Figure 3 This is a schematic diagram of the connection between the baffle box and the receiving box of the present invention.

[0022] Figure 4 This is a structural schematic diagram of the present invention along the cross-section of the base and the baffle box.

[0023] Figure 5 For the present invention Figure 4 A magnified structural diagram at point A in the diagram.

[0024] Figure 6 This is a schematic diagram of the structure of the base of the present invention.

[0025] Figure 7 This is a schematic diagram of the structure at the connection between the baffle box and the receiving box of the present invention.

[0026] Figure 8 For the present invention Figure 7 A magnified structural diagram at point B in the diagram.

[0027] Figure 9 This is a schematic diagram of the structure of the present invention after cross-section of the baffle box and the receiving box.

[0028] In the diagram: 1. Base; 2. Workbench; 3. Top rod; 4. Baffle box; 5. Electric push rod; 6. Placement plate; 7. Push column; 8. Slide rod; 9. Irregular clamping component; 10. First spring; 11. Hanging column; 12. L-shaped frame; 13. Receiving box; 14. Baffle; 15. Telescopic rod; 16. Storage slot; 17. Round plate; 18. Through rod; 19. Receiving seat; 20. Receiving slot; 21. Protective pad; 22. Elastic telescopic rod; 23. Slowing disc; 24. Dry powder bag; 25. Installation component; 26. Support rod; 27. Round box; 28. Fan; 29. ​​Slide groove; 30. Suction pipe; 31. Through hole; 32. Slide rod; 33. Baffle; 34. Suction slot; 35. Cutter; 36. Groove; 37. Connecting plate; 38. Second spring; 39. Cover plate. Detailed Implementation

[0029] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0030] Application Scenarios: Alcohol lamps are commonly used disinfection tools on workbenches in biological laboratories, but their use poses a high fire risk. First, alcohol lamps are prone to wick splashing, especially when the wick is too short or burns incompletely. Workbenches typically contain a large amount of flammable experimental equipment and reagents, and splashed alcohol or flames can easily ignite a fire. Second, both too much and too little alcohol in the lamp can be dangerous. Too much alcohol can cause the vapors to expand rapidly and overflow after ignition, potentially leading to an explosion; too little alcohol can cause a mixture of alcohol vapor and air to accumulate inside the lamp, which can also result in a deflagration upon ignition.

[0031] like Figures 1 to 9The biological experimental protective device shown includes a base 1, a workbench 2 fixedly mounted on the base 1, an installation component 25 fixedly mounted on the base 1 for mounting the equipment to be sterilized, several top rods 3 fixedly mounted on the base 1, and a baffle box 4 fixedly connected to the ends of all the top rods 3. The baffle box 4 is equipped with a shielding and placing component and a clamping component. The shielding and placing component is used to provide a support point for the alcohol lamp, and the clamping component is used to limit the alcohol lamp. A receiving component is provided at the bottom of the baffle box 4. When the shielding and placing component releases its support for the alcohol lamp, it will release the clamping component to release the limitation on the alcohol lamp, so that when the alcohol lamp is ejected and ignited, it falls into the receiving component.

[0032] As a further embodiment of the present invention, the shielding placement assembly includes an electric push rod 5. The fixed part of the electric push rod 5 is fixedly installed on the outer wall of the baffle box 4. The telescopic end of the electric push rod 5 passes through the baffle box 4 and is fixedly connected to a placement plate 6. The placement plate 6 is slidably connected to the inside of the baffle box 4.

[0033] As a further embodiment of the present invention, the clamping assembly includes a push post 7 and a slide rod 8. The push post 7 is fixedly connected to the placement plate 6, the slide rod 8 is slidably connected to the side wall of the baffle box 4, and a shaped clamping member 9 is fixedly connected to the end of the slide rod 8. A first spring 10 is fixedly connected between the shaped clamping member 9 and the baffle box 4. The first spring 10 is sleeved on the outer wall of the slide rod 8, and a hanging post 11 is fixedly connected to the side wall of the shaped clamping member 9.

[0034] As a further embodiment of the present invention, the receiving assembly includes an L-shaped frame 12 and a receiving box 13. The L-shaped frame 12 is fixedly connected to the outer wall of the slide bar 8. The receiving box 13 is located below the baffle box 4. A baffle 14 is fixedly connected to the side wall of the receiving box 13. A telescopic rod 15 is fixedly connected to the bottom of the baffle box 4. The telescopic rod 15 is fixedly connected to the baffle 14. The L-shaped frame 12 cooperates with the baffle 14.

[0035] Example 1: It should be understood that the target part that needs to be heated or disinfected is placed on the mounting assembly 25 and adjusted to a suitable position. Then, the alcohol lamp is placed on the two shielding placement plates 6 inside the baffle box 4. After placement, the alcohol lamp is clamped by two irregularly shaped clamping parts 9 to maintain the stability of the alcohol lamp.

[0036] After the alcohol lamp is clamped, the target part is heated by igniting the alcohol lamp wick. If the alcohol lamp ignites during the heating process, the electric push rod 5 is activated first. The retraction of the electric push rod 5 releases the alcohol lamp from the clamp. As the placement plates 6 move away from each other, the irregular clamp 9 will continuously apply clamping force to the alcohol lamp bottle under the action of the first spring 10, which helps to prevent the alcohol lamp from moving with the placement plate 6. During the movement of the placement plate 6, the push column 7 will move synchronously. After the push column 7 contacts the hanging column 11 during the movement, it will push the hanging column 11 to move. The hanging column 11 will drive the irregular clamp 9 to move. The irregular clamp 9 will release the clamp on the alcohol lamp bottle. After the clamp is released, the alcohol lamp will fall into the receiving box 13.

[0037] Furthermore, as the irregularly shaped clamping parts 9 move away from each other, they will cause the sliding rod 8 to move. The movement of the sliding rod 8 will cause the L-shaped frame 12 to move, and the L-shaped frame 12 will gradually detach from the baffle 14. At this time, the baffle 14, which has lost its support, moves downward under the action of gravity, while prolonging the time for the L-shaped frame 12 to detach from the baffle 14, ensuring that the alcohol lamp falls into the receiving box 13 before the L-shaped frame 12 and the baffle 14 completely detach. After the alcohol lamp falls into the receiving box 13, the receiving box 13, having lost its limit, continues to move downward under the action of gravity, eventually causing the alcohol lamp to move away from the placement plate 6.

[0038] Furthermore, after the alcohol lamp falls into the receiving box 13 and continues to move downwards with it, the electric push rod 5 is activated again. The electric push rod 5 pushes the placement plate 6 back to its original position. After the two placement plates 6 return to their original positions, a shielding area is formed above the burning alcohol lamp. At this time, the returned placement plate 6 can intercept the burning alcohol lamp, thereby effectively preventing the alcohol lamp from damaging other items around it when it splashes.

[0039] The mounting assembly 25 includes two adjustable rods, with a connecting rod between the two adjustable rods. Two movable seats are slidably connected to the connecting rod, and an adjustment plate is fixedly connected between the two movable seats. Two adjustable clamping blocks are symmetrically fixedly connected to the bottom of the adjustment plate for clamping the equipment to be disinfected. The above is prior art and will not be disclosed in detail here.

[0040] As a further embodiment of the present invention, a storage groove 16 is provided on the base 1, a buffering component is provided inside the receiving box 13, a circular plate 17 is provided above the buffering component, a through rod 18 is fixedly connected to the side of the circular plate 17 away from the buffering component, one end of the through rod 18 passes through the receiving box 13 and is fixedly connected to the receiving seat 19, the receiving seat 19 is fixedly connected to the inner wall of the receiving box 13, a receiving groove 20 is provided on the top of the receiving seat 19, and a protective pad 21 is fixedly connected inside the receiving groove 20.

[0041] As a further embodiment of the present invention, the mitigation component includes an elastic telescopic rod 22, the telescopic end of which is fixedly connected to a mitigation disc 23, and a circular plate 17 is located on the mitigation disc 23.

[0042] In Example 2, after the receiving box 13 is released from its limit, it falls under the action of gravity. Since the alcohol lamp has already fallen into the receiving box 13, the receiving box 13 will move synchronously with the protective pad 21. Firstly, in order to prevent the alcohol lamp itself from being damaged due to collision and further increasing the risk of fire, the protective pad 21 is set inside the receiving box 13 for protection, so that the alcohol lamp falls onto the protective pad 21. The protective pad 21 is made of soft material to protect the alcohol lamp and reduce the impact. After the alcohol lamp falls onto the protective pad 21, the protective pad 21 will apply a downward pressure to the through rod 18, the through rod 18 will apply a downward pressure to the receiving seat 19, and the receiving seat 19 will apply a downward pressure to the damping plate 23. Thus, under the action of the elastic telescopic rod 22, part of the force is absorbed, which helps to protect the alcohol lamp and prevent the alcohol lamp from being damaged by a large impact. Secondly, during the process of applying pressure to the damping plate 23, the relative position between the receiving box 13 and the alcohol lamp remains stable. Therefore, this design can help prevent the liquid in the burning alcohol lamp from breaking through the receiving box 13 and splashing to other parts due to the relative displacement between the two.

[0043] As a further embodiment of the present invention, a dry powder bag 24 is fixedly installed on the bottom of the placement plate 6, and a trigger switch is fixedly installed on the slowing plate 23.

[0044] Example 3: After the alcohol lamp enters the receiving box 13, the trigger switch will cause the dry powder bag 24 to be automatically sprayed. The trigger switch can be a pressure sensor. When the pressure reaches a specified range, the dry powder bag 24 will be sprayed, thereby extinguishing the burning alcohol lamp.

[0045] As a further embodiment of the present invention, a support rod 26 is fixedly connected inside the storage slot 16. The end of the support rod 26 passes through the circular plate 17 and is fixedly connected to a circular box 27. The circular box 27 is slidably connected to the through rod 18. A fan 28 is fixedly connected to the bottom of the circular box 27. A sliding groove 29 is opened at the bottom of the receiving box 13. The circular box 27 is located at the bottom of the sliding groove 29. Multiple suction pipes 30 are fixedly connected to the top of the circular box 27. The receiving seat 19 and the protective pad 21 are provided with a number of through holes 31 equal to the number of suction pipes 30.

[0046] As a further embodiment of the present invention, a sliding rod 32 is fixedly connected to the protective pad 21, and a baffle 33 is fixedly connected to the end of the sliding rod 32 away from the protective pad 21. The baffle 33 is located directly above the through hole 31, and a suction groove 34 is provided on the outer wall of the suction pipe 30.

[0047] Example 4: After the dry powder is sprayed, in order to ensure that the dry powder can fully act on the inside of the receiving box 13 and treat the splashed alcohol, the blower 28 is also started at the same time as the dry powder is sprayed. The blower 28 will draw air through the suction pipe 30 at the bottom of the receiving seat 19, thereby creating a negative pressure space, so that the sprayed dry powder can flow through the through hole 31. The flow through the through hole 31 can make the dry powder evenly distributed, thereby helping to prevent the occurrence of processing dead corners.

[0048] In the second embodiment, as the receiving seat 19 moves downward, a relative displacement occurs between the round box 27 and the sliding groove 29 on the receiving box 13. This causes the suction pipe 30 to be inserted into the through hole 31 and come into contact with the baffle 33. The baffle 33 then blocks the end of the suction pipe 30, causing the suction to concentrate on the suction groove 34. By setting the suction direction of the suction groove 34 to be non-uniform, the flow of gas becomes irregular, which helps to evenly disperse the dry powder to different parts, thus facilitating the treatment of splashed liquid.

[0049] As a further embodiment of the present invention, a cutter 35 is slidably connected to the receiving box 13, a slot 36 is provided on the cutter 35, a connecting plate 37 is fixedly connected to the cutter 35, a second spring 38 is fixedly connected between the connecting plate 37 and the receiving box 13, and a baffle 39 is fixedly connected to the baffle box 4, the baffle 39 cooperating with the connecting plate 37.

[0050] In Example 5, when the receiving box 13 moves downward under the action of gravity, the relative displacement between the shield 39 and the connecting plate 37 will occur. The shield 39 will release the restriction on the connecting plate 37. Under the action of the second spring 38, the connecting plate 37 will push the cutter 35 to move. As the two cutters 35 approach each other, they will cut the wick of the alcohol lamp, which will help to extinguish the combustion source. In addition, the cutter 35 has a slot 36, which will not affect the dispersion of dry powder.

[0051] Working principle of this invention:

[0052] Place the target part that needs to be heated or sterilized on the mounting assembly 25 and adjust it to a suitable position. Then, place the alcohol lamp on the two shielding plates 6 inside the baffle box 4. After placement, apply clamping force to the alcohol lamp through the two irregular clamping parts 9 to maintain the stability of the alcohol lamp.

[0053] After the alcohol lamp is clamped, the target part is heated by igniting the alcohol lamp wick. If the alcohol lamp ignites during the heating process, the electric push rod 5 is activated first. The retraction of the electric push rod 5 releases the alcohol lamp from the clamp. As the placement plates 6 move away from each other, the irregular clamp 9 will continuously apply clamping force to the alcohol lamp bottle under the action of the first spring 10, which helps to prevent the alcohol lamp from moving with the placement plate 6. During the movement of the placement plate 6, the push column 7 will move synchronously. After the push column 7 contacts the hanging column 11 during the movement, it will push the hanging column 11 to move. The hanging column 11 will drive the irregular clamp 9 to move. The irregular clamp 9 will release the clamp on the alcohol lamp bottle. After the clamp is released, the alcohol lamp will fall into the receiving box 13.

[0054] Furthermore, as the irregularly shaped clamping parts 9 move away from each other, they will cause the sliding rod 8 to move. The movement of the sliding rod 8 will cause the L-shaped frame 12 to move, and the L-shaped frame 12 will gradually detach from the baffle 14. At this time, the baffle 14, which has lost its support, moves downward under the action of gravity, while prolonging the time for the L-shaped frame 12 to detach from the baffle 14, ensuring that the alcohol lamp falls into the receiving box 13 before the L-shaped frame 12 and the baffle 14 completely detach. After the alcohol lamp falls into the receiving box 13, the receiving box 13, having lost its limit, continues to move downward under the action of gravity, eventually causing the alcohol lamp to move away from the placement plate 6.

[0055] Furthermore, after the alcohol lamp falls into the receiving box 13 and continues to move downwards with it, the electric push rod 5 is activated again. The electric push rod 5 pushes the placement plate 6 back to its original position. After the two placement plates 6 return to their original positions, a shielding area is formed above the burning alcohol lamp. At this time, the returned placement plate 6 can intercept the burning alcohol lamp, thereby effectively preventing the alcohol lamp from damaging other items around it when it splashes.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A biological experiment protection device for biological teaching, comprising a base (1), a workbench (2) is fixedly installed on the base (1), an installation assembly (25) is fixedly installed on the base (1), and the installation assembly (25) is used for installing equipment to be disinfected, characterized in that: The base (1) is fixedly installed with a plurality of top rods (3), the ends of all the top rods (3) are fixedly connected with a blocking box (4), the inside of the blocking box (4) is provided with a shielding placing assembly and a clamping assembly, the shielding placing assembly is used for providing a support point for the alcohol lamp, the clamping assembly is used for limiting the alcohol lamp, the bottom of the blocking box (4) is provided with a receiving assembly, the shielding placing assembly is removed from the support of the alcohol lamp in the process, and the clamping assembly is removed from the limiting of the alcohol lamp, so that the alcohol lamp falls into the inside of the receiving assembly when the alcohol lamp is sprayed and burned; ​ The shielding placing assembly comprises an electric push rod (5), the fixed portion of the electric push rod (5) is fixedly installed on the outer wall of the blocking box (4), the telescopic end of the electric push rod (5) is fixedly connected with a placing plate (6) after penetrating through the blocking box (4), and the placing plate (6) is slidingly connected in the inside of the blocking box (4); The clamping assembly comprises a pushing column (7) and a sliding rod (8), the pushing column (7) is fixedly connected to the placing plate (6), the sliding rod (8) is slidingly connected to the side wall of the blocking box (4), the end of the sliding rod (8) is fixedly connected with a special-shaped clamping piece (9), the special-shaped clamping piece (9) and the blocking box (4) are fixedly connected with a first spring (10), the first spring (10) is sleeved on the outer wall of the sliding rod (8), and the side wall of the special-shaped clamping piece (9) is fixedly connected with a hanging column (11); The receiving assembly comprises an L-shaped frame (12) and a receiving box (13), the L-shaped frame (12) is fixedly connected to the outer wall of the sliding rod (8), the receiving box (13) is located below the blocking box (4), the side wall of the receiving box (13) is fixedly connected with a baffle (14), the bottom of the blocking box (4) is fixedly connected with a telescopic rod (15), the telescopic rod (15) is fixedly connected with the baffle (14), and the L-shaped frame (12) cooperates with the baffle (14).

2. The biological experiment protection device for biological teaching according to claim 1, characterized in that: The bottom of the base (1) is provided with a receiving groove (16), the inside of the receiving box (13) is provided with a slowing-down assembly, the upper side of the slowing-down assembly is provided with a circular plate (17), the side, away from the slowing-down assembly, of the circular plate (17) is fixedly connected with a penetrating rod (18), one end of the penetrating rod (18) penetrates through the receiving box (13) and is fixedly connected with a receiving seat (19), the receiving seat (19) is fixedly connected with the inner wall of the receiving box (13), the top of the receiving seat (19) is provided with a receiving groove (20), and the inside of the receiving groove (20) is fixedly connected with a protection pad (21).

3. The biological experiment protection device for biological teaching according to claim 2, characterized in that: The slowing-down assembly comprises an elastic telescopic rod (22), and the telescopic end of the elastic telescopic rod (22) is fixedly connected with a slowing-down disc (23).

4. The biological experiment protection device for biological teaching according to claim 3, characterized in that: The bottom of the placing plate (6) is fixedly installed with a dry powder bag (24), and the slowing-down disc (23) is fixedly installed with a trigger switch. The bottom of the placing plate (6) is fixedly installed with a dry powder bag (24), and the slowing-down disc (23) is fixedly installed with a trigger switch.

5. The biological experimental protective device for biological teaching according to claim 4, characterized in that: The inside of the accommodation groove (16) is fixedly connected with a supporting rod (26), the end of the supporting rod (26) is fixedly connected with a circular box (27) after penetrating through the circular plate (17), the circular box (27) is slidably connected with a penetrating rod (18), the bottom of the circular box (27) is fixedly communicated with a fan (28), the bottom of the receiving box (13) is provided with a sliding groove (29), the circular box (27) is located at the bottom of the sliding groove (29), the top of the circular box (27) is fixedly communicated with a plurality of air suction pipes (30), the receiving seat (19) and the protection pad (21) are provided with through holes (31) equal in number to the air suction pipes (30).

6. The biological experimental protective device for biological teaching according to claim 5, characterized in that: The protection pad (21) is fixedly connected with a sliding rod (32), one end of the sliding rod (32) away from the protection pad (21) is fixedly connected with a baffle (33), the baffle (33) is located directly above the through hole (31), and the outer wall of the air suction pipe (30) is provided with an air suction groove (34).

7. The biological experimental protective device for biological teaching according to claim 6, characterized in that: The receiving box (13) is slidably connected with a cutter (35), the cutter (35) is provided with a notch (36), the cutter (35) is fixedly connected with a connecting plate (37), the connecting plate (37) and the receiving box (13) are fixedly connected with a second spring (38), the baffle box (4) is fixedly connected with a shielding piece (39), and the shielding piece (39) is matched with the connecting plate (37).

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