Safety protection device for access behaviors of dangerous chemicals in laboratory

Abstract

The invention relates to the technical field of dangerous chemical storage and taking, in particular to a safety protection device for laboratory dangerous chemical storage and taking behaviors. The safety protection device comprises a storage cabinet and two door plates rotationally connected to the storage cabinet, a plurality of moving plates are connected into the storage cabinet in a sliding mode, a rotating storage rack is arranged on the moving plate on the lowest layer, and trays are arranged on the other moving plates except the moving plate on the lowest layer. The multiple layers of partition plates are triggered to be unfolded synchronously in a stepped mode by opening the door plate, and manual steps are reduced through a magnetic control linkage mechanism; the rotary storage rack adopts a radial storage barrel and a three-point clamping system, so that the overturning resistance of the arc-bottom container is greatly improved, the storage and taking standardization, safety and efficiency of hazardous chemicals are remarkably improved, and the rotary storage rack is suitable for intensive safety management of highly corrosive and volatile reagents.

Description

Technical Field

[0001] The present invention relates to the technical field of access to hazardous chemicals, and particularly to a safety protection device for the access behavior of hazardous chemicals in a laboratory. Background Art

[0002] In a laboratory environment, the access operation of hazardous chemicals (such as strong acids, strong bases, flammable and explosive substances, highly toxic reagents, etc.) is a key link in experimental safety management. Due to the toxic, corrosive, volatile, flammable, and explosive characteristics of hazardous chemicals, if leakage, dumping, or operation errors occur during the access process, it is extremely easy to trigger major safety accidents such as fires, explosions, and poisoning, posing a serious threat to the health of experimental personnel, experimental equipment, and the environment.

[0003] Currently, the commonly used hazardous chemical storage devices in laboratories are mainly traditional cabinet-type storage systems. Most storage cabinets adopt a static layered design. First, when accessing the internal chemicals, it is necessary to manually move the external containers. During this process, the containers are prone to collision, dumping, or slipping, resulting in label wear, bottle mouth loosening, or liquid leakage. For example, if a strongly corrosive liquid (such as concentrated sulfuric acid) leaks due to dumping, it may directly burn the operator or corrode the equipment. Second, generally, the cabinet body is relatively deep (usually ≥60 cm) and lacks a transparent observation window, making it difficult for experimental personnel to visually locate the position of the target reagent. To find a specific container, it is often necessary to repeatedly move the outer layer of items, further increasing the operation complexity and the probability of errors. Finally, large reagent bottles and small containers are stored mixedly, resulting in a complex access path and easy misoperation during the operation process, further exacerbating the safety hazards.

[0004] Based on the above situation, there is an urgent need for a safety protection device for the access behavior of hazardous chemicals in a laboratory. Summary of the Invention

[0005] In order to overcome the disadvantages of the existing laboratory hazardous chemical storage devices, such as complex access paths and poor container adaptability, the technical problem to be solved is: to provide a safety protection device for the access behavior of hazardous chemicals in a laboratory.

[0006] Technical Solution: A safety protection device for the access behavior of hazardous chemicals in a laboratory, including a storage cabinet and two doors rotatably connected thereto. A plurality of moving plates are slidably connected in the storage cabinet. A rotary storage rack is provided on the lowermost moving plate, and trays are provided on the other moving plates except the lowermost one.

[0007] In one embodiment, fixing members are symmetrically fixed on the lowermost moving plate. Connecting plates are symmetrically fixed to the bottom of the second-lowermost moving plate, and the connecting plates are sleeved on the adjacent fixing members to form a physical connection between the upper and lower layers. Connecting frames are symmetrically fixed to all trays except the uppermost one. Fixing plates are symmetrically fixed to the bottoms of all moving plates except the lowermost two layers, and the fixing plates are sleeved on the adjacent connecting frames to ensure the linkage between the middle layer and the top layer. The aim is to pull the lowermost moving plate, which can drive the synchronous pulling out of the moving plates of other layers.

[0008] In one embodiment, a connecting column is fixed to the bottom of the lowermost moving plate. A rotating frame is rotatably connected to the inner side of the bottom wall of the storage cabinet, and a sliding groove is formed thereon. The connecting column is embedded in the sliding groove. An arc-shaped connecting member is fixed to the rotating frame, and a convex knot is provided in the middle thereof. The connecting member passes through the side wall of the storage cabinet. A second magnet is fixed to the end of the connecting member, and a first magnet is fixed to the door panel close to the connecting member. The door panel and the moving plate are linked.

[0009] In one embodiment, a plurality of storage cylinders are annularly arranged on the upper surface of the rotary storage rack with the center of the circle as the midpoint. A buffer member that slides axially is provided in each storage cylinder, and a buffer spring is connected between the buffer member and the adjacent storage cylinder. A fixing frame is fixed to each buffer member. Rotating limiting rods are evenly distributed along the circumferential direction on the inner wall of each storage cylinder, and a limiting torsion spring is connected between the limiting rod and the adjacent storage cylinder. Each limiting torsion spring is wound around the adjacent limiting rod. The aim is to enable the vessel containing chemicals to be stably clamped when inserted into the storage cylinder.

[0010] In one embodiment, an air storage cylinder is fixed to the outer wall of the storage cabinet, and an air outlet pipe is provided thereon. The connecting member passes through the air storage cylinder. A piston member is fixed to the end of the connecting member close to the second magnet, and the piston member slides in the air storage cylinder. The aim is to achieve speed control by using gas damping buffering and indirectly control the speed of the inward and outward movement of the moving plate.

[0011] In one embodiment, a fixing block is fixed to the end of the piston member, and an insertion hole is formed therein. A fixing screw rod is fixed to the adjacent door panel, and a limiting member is threadedly connected to the fixing screw rod. The limiting member is in clamping fit with the fixing block. The aim is to ensure that the connecting member cannot move when the door panel is in the closed state and avoid the wrong outward movement of the moving plate caused by accidental touch.

[0012] In one embodiment, a transmission wheel is provided on the door panel close to the connecting member, a transmission gear is provided on the other door panel, and a synchronous wheel is rotatably provided on the side of the storage cabinet close to the transmission gear. A connecting gear is fixed to the synchronous wheel, and a conveyor belt is wound around the transmission wheel and the synchronous wheel. The connecting gear and the transmission gear are meshed with each other. The aim is to enable the linkage of the two door panels by operating any one of the door panels with one hand.

[0013] In one embodiment, a shielding rack is provided at the top of the storage cabinet, aiming to protect the connecting gears, transmission gears and conveyor belt from accidental contact by external objects.

[0014] Advantages of the present invention: By opening the door panel, the multi-layer partition is triggered to expand synchronously in a stepped manner, and the magneto-controlled linkage mechanism reduces manual steps; the rotating storage rack adopts a radially arranged storage cylinder and a three-point clamping system, greatly improving the anti-overturning force of the arc-bottom container, and significantly enhancing the standardization, safety and efficiency of the access of hazardous chemicals, which is suitable for the intensive safety management of strongly corrosive and volatile reagents.

[0015] The present invention constitutes a pneumatic damping system through an air storage cylinder and a piston member, limiting the linear velocity of the moving plate, reducing the mechanical vibration energy, effectively preventing liquid splashing and glass bottle collision, and the fixed screw rod and the limiting member automatically lock the connecting member through the opening and closing of the door panel, eliminating the risk of accidental external touch and enhancing the safety and reliability.

[0016] The present invention realizes the linkage operation of two door panels through a synchronous opening and closing mechanical structure, using gear meshing and belt drive, significantly enhancing the convenience and safety of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic three-dimensional structure diagram of a safety protection device for the access behavior of laboratory hazardous chemicals of the present invention.

[0018] Figure 2 It is a schematic cross-sectional view of the three-dimensional structure of components such as the storage cabinet, door panel and moving plate of the present invention.

[0019] Figure 3 It is a schematic cross-sectional view of the three-dimensional structure of components such as the fixing member, connecting plate and rotating frame of the present invention.

[0020] Figure 4 It is a schematic cross-sectional view of the three-dimensional structure of the speed reduction mechanism of the present invention.

[0021] Figure 5 It is a schematic cross-sectional view of the three-dimensional structure of the limiting member and the fixing block of the present invention.

[0022] Figure 6 It is a schematic cross-sectional view of the three-dimensional structure of the storage mechanism of the present invention.

[0023] Names of the reference numerals in the figure: 1: storage cabinet, 11: door panel, 12: movable plate, 15: first magnet, 16: second magnet, 17: connecting piece, 18: rotating storage rack, 19: tray, 110: connecting rack, 111: fixing plate, 1101: shielding rack, 112: fixing piece, 113: connecting plate, 114: rotating rack, 115: connecting column, 116: storage cylinder, 2: air storage cylinder, 21: piston part, 22: fixing block, 23: fixing lead screw, 24: limiting part, 3: buffer part, 31: buffer spring, 32: limiting rod, 33: limiting torsion spring, 34: fixing rack, 4: driving wheel, 41: conveyor belt, 42: connecting gear, 43: driving gear, 44: synchronous wheel. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the present invention clearer and more explicit, the present invention will be further described in detail below in conjunction with the specific implementation manners and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following descriptions, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0025] Example 1: Refer to the attached Figures 1-3 , a safety protection device for the access behavior of laboratory hazardous chemicals, including a storage cabinet 1 and two door panels 11 rotatably connected thereto. A plurality of movable plates 12 are slidably connected in the storage cabinet 1 for dividing the interior of the storage cabinet 1 into several independent spaces to facilitate the classified storage of chemicals. A rotating storage rack 18 is provided on the lowermost movable plate 12 for storing the opened chemicals to facilitate unified management and observation. Trays 19 are provided on the other movable plates 12 except the lowermost one for storing the unopened chemicals. Labels are provided on each compartment to indicate information such as the name, hazard, storage date, etc. of the chemicals, facilitating quick identification and management.

[0026] When accessing the unopened chemicals, the door panel 11 can be opened first, and the corresponding compartment can be found according to the type of chemicals. The corresponding movable plate 12 is pulled out a certain distance, and the movable plate 12 will drive the tray 19 to move out together. Then the reagent bottle is placed in the corresponding position or the target reagent bottle is taken out. When accessing the opened chemicals, the opened reagent bottle is placed on the rotating storage rack 18 at the lowermost layer. When taking out, the rotating storage rack 18 can be directly rotated to facilitate observing the chemical label and quickly finding the target chemical. After the access is completed, the door panel 11 can be closed.

[0027] When accessing multiple chemicals, if each movable plate 12 needs to be pulled out separately every time, the operation is cumbersome and the efficiency is low. Therefore, to solve this problem, a linkage mechanism needs to be designed to enable only the lowermost movable plate 12 to be pulled to drive the movable plates 12 of other layers to be pulled out synchronously.

[0028] Reference appendix Figure 3 Specifically, symmetrically distributed fixing members 112 are fixedly connected to the bottom movable plate 12 of the lowermost layer. Symmetrically distributed connecting plates 113 are fixedly connected to the bottom of the movable plate 12 of the second-lowermost layer, and the connecting plates 113 are sleeved on the adjacent fixing members 112 to form a physical connection between the upper and lower layers. Connection frames 110 are symmetrically distributed and fixedly connected to all trays 19 except the uppermost layer. Symmetrically distributed fixing plates 111 are fixedly connected to the bottom of the movable plates 12 except the lowermost two layers, and the fixing plates 111 are sleeved on the adjacent connection frames 110 to ensure the linkage between the middle layer and the top layer.

[0029] When storing different types of chemicals, the synchronous operation of the compartments can be achieved through the linkage structure. The specific steps are as follows: Pull the movable plate 12 of the lowermost layer outwards. The fixing member 112 moves accordingly, and drives the movable plate 12 and the tray 19 of the second-lowermost layer outwards through the connecting plate 113. The tray 19 of the second-lowermost layer drives the movable plates 12 and the trays 19 of other layers to be pulled out synchronously through the connection frame 110 and the fixing plate 111, so that each compartment is in a slightly staggered state in a stepped shape. After the movable plate 12 is pulled out, the operator can place the chemicals on the corresponding compartments in sequence, and at the same time clearly observe the labels on each tray 19 to ensure accurate picking and placing of the target chemicals.

[0030] After the placement is completed, push the movable plate 12 of the lowermost layer inwards back to its original position. The fixing member 112, the connecting plate 113, the connection frame 110, and the fixing plate 111 will drive the movable plates 12 of other layers to be retracted synchronously to restore their original positions, realizing the synchronous operation of the compartments, and significantly improving the efficiency and convenience of chemical storage.

[0031] When storing chemicals, it is necessary to first open the door panel 11 and then manually pull out the movable plate 12. These two actions are rather cumbersome and affect the efficiency. Therefore, a design can be made on how to open the door panel 11 through a single action to achieve the automatic synchronous movement of all movable plates 12 and automatically reset when the door panel 11 is closed, thereby simplifying the operation process.

[0032] Specifically, a connecting column 115 is fixedly connected to the bottom of the lowermost movable plate 12 for transmitting power. The inner side of the bottom wall of the storage cabinet 1 is rotatably connected with a rotating frame 114, on which a chute is opened. The connecting column 115 is embedded in the chute for converting rotational motion into linear motion. An arc-shaped connecting member 17 is fixedly connected to the rotating frame 114, and a convex knot is provided in the middle for limiting and transmitting force. The connecting member 17 passes through the side wall of the storage cabinet 1. A second magnet 16 is fixedly connected to the end of the connecting member 17, and a first magnet 15 is fixedly connected to the door panel 11 close to the connecting member 17 to cooperate with the second magnet 16 to realize linkage triggering.

[0033] When the operator opens the door panel 11, the first magnet 15 attracts and combines with the second magnet 16, and transmits the acting force to the rotating frame 114 through the connecting member 17. At this time, the rotational movement of the rotating frame 114 is converted into the linear displacement of the lowermost partition moving plate 12 through the chute and the connecting column 115. This process is similar to a wheel and axle mechanism (the rotating frame 114 is the axle, and the connecting member 17 is the wheel arm), which amplifies the operating force through the lever principle and reduces the manpower requirement. After the lowermost moving plate 12 moves outwards, through the above linkage mechanism, the moving plates 12 of other layers are tractioned synchronously layer by layer to form a stepped expansion.

[0034] When the door panel 11 is closed, the first magnet 15 pulls the connecting member 17 in the reverse direction, and the rotating frame 114 rotates in the reverse direction, driving all the moving plates 12 to reset. At this time, the convex section in the middle of the connecting member 17 contacts the side wall of the storage cabinet 1, and physical limit is used to prevent over-travel and avoid structural jamming.

[0035] Reference appendix Figure 6 In the scenario of temporarily storing hazardous chemicals in the laboratory, the opened chemical reagents (such as volatile and corrosive liquids) are often stored in test tubes or wide-mouth reagent bottles with a circular arc bottom. The geometric characteristics and packaging defects of such containers lead to the following safety risks: the contact area between the test tube with a circular arc bottom and the flat rotating storage rack 18 is too small, and it is prone to tipping due to external force disturbance. For non-hermetic glass bottles (such as ground glass bottles), there is a risk of leakage due to the sealing gap, and independent space isolation is required to prevent cross-contamination.

[0036] Specifically, a plurality of storage cylinders 116 are annularly arranged on the upper surface of the rotating storage rack 18 with the center of the circle as the midpoint to form a radial positioning structure for carrying the opened chemical utensils. A buffer member 3 that slides axially is arranged in each storage cylinder 116. A buffer spring 31 is connected between each buffer member 3 and the adjacent storage cylinder 116 to balance the impact load when the utensil is inserted. A fixing frame 34 is fixedly connected to each buffer member 3. The inner wall of each storage cylinder 116 is evenly distributed with rotating limiting rods 32 in the circumferential direction. A limiting torsion spring 33 is connected between each limiting rod 32 and the adjacent storage cylinder 116. Each limiting torsion spring 33 is wound around the adjacent limiting rod 32 to form a self-adaptive clamping system.

[0037] Initially, the limiting rod 32 is kept in the retracted state under the action of the limiting torsion spring 33, and the diameter of the clamping channel is the smallest. When the utensil containing chemicals is inserted into the storage cylinder 116, the bottle wall squeezes the limiting rod 32 to rotate outwards, and the limiting torsion spring 33 stores energy. When the utensil is completely inserted, the limiting torsion spring 33 drives the limiting rod 32 to rebound, generating a radial clamping force to achieve three-point dynamic clamping. When external vibration is transmitted to the utensil, the buffer member 3 moves axially, and energy is dissipated and shock is absorbed through the buffer spring 31. The limiting rod 32 and the limiting torsion spring 33 form a damping system, greatly reducing the amplitude of lateral vibration.

[0038] Reference appendix Figures 4-5, during the rapid movement of each layer of the moving plate 12 with the rotating frame 114 and the connecting piece 17, mechanical vibration causes the liquid inside the vessel to slosh through rigid transmission, which may cause splashing of strong acids (such as concentrated sulfuric acid) or strong alkalis (such as sodium hydroxide solution) in the test tube, resulting in skin burns or environmental pollution; it may accelerate the volatilization of volatile organic compounds (such as ether, acetone), increasing the air pollution and the risk of fire and explosion in the laboratory; it may cause the glass bottles on its layer to collide and break. Therefore, in this embodiment, the speed needs to be controlled during the inward and outward movement of the moving plate 12.

[0039] Specifically, an air storage cylinder 2 is fixedly connected to the outer wall of the storage cabinet 1, and an air outlet pipe is provided thereon. The connecting piece 17 passes through the air storage cylinder 2, and a piston member 21 is fixedly connected to the end of the connecting piece 17 close to the second magnet 16. The piston member 21 slides inside the air storage cylinder 2.

[0040] As described above, when the door panel 11 acts on the connecting piece 17 through the first magnet 15 and the second magnet 16, the inward and outward movement of the connecting piece 17 drives the piston member 21 to move inward and outward. When the piston member 21 moves inward, the gas in the air storage cylinder 2 is compressed, and the gas slowly discharges through the air outlet pipe, slowing down the movement speed of the connecting piece 17. When the piston member 21 moves outward, the external gas enters the air storage cylinder 2 through the air outlet pipe, also controlling the movement speed of the connecting piece 17, thereby indirectly controlling the inward and outward movement speed of the moving plate 12, avoiding the above risks caused by mechanical vibration due to rapid movement, and ensuring the safety of the laboratory.

[0041] Since a part of the connecting piece 17 is located outside the storage cabinet 1, a trolley or other objects in the laboratory may accidentally touch the end of the connecting piece 17, causing the moving plate 12 to move outward incorrectly, leading to potential safety hazards. Therefore, in order to prevent the connecting piece 17 from moving due to accidental touch, protective measures need to be taken for it.

[0042] Specifically, a fixed block 22 is fixedly connected to the end of the piston member 21, and a jack is opened therein. A fixed screw rod 23 is fixedly connected to the adjacent door panel 11, and a restricting member 24 is threadedly connected to the fixed screw rod 23. The restricting member 24 is in snap-fit with the fixed block 22.

[0043] When the door panel 11 is opened, the door panel 11 drives the fixed screw rod 23 to rotate, driving the restricting member 24 to move downward and withdraw from the fixed block 22 to achieve unlocking. When the door panel 11 is closed, the door panel 11 drives the fixed screw rod 23 to rotate in the reverse direction, driving the restricting member 24 to move upward and insert into the fixed block 22 to achieve locking. Through the snap-fit of the restricting member 24 and the fixed block 22, it is ensured that the connecting piece 17 cannot move when the door panel 11 is in the closed state, avoiding the incorrect outward movement of the moving plate 12 due to accidental touch. The opening and closing actions of the door panel 11 can achieve the locking and unlocking of the connecting piece 17, with convenient and reliable operation.

[0044] Embodiment 2: Refer to the appendixFigures 1-2 In a laboratory scenario, an operator often needs to operate two door panels 11 with one hand because the other hand is occupied (such as holding chemical vessels). If the two door panels 11 need to be opened and closed separately in two times, the efficiency is low and there are safety hazards. Therefore, it is necessary to design a synchronous opening and closing mechanical structure, so that the two door panels 11 can be linked by operating any one of the door panels 11 with one hand, improving the operation convenience and safety.

[0045] Specifically, a transmission wheel 4 is provided on the door panel 11 on the side close to the connecting member 17, a transmission gear 43 is provided on the other door panel 11, a rotating synchronous wheel 44 is provided on the storage cabinet 1 on the side close to the transmission gear 43, a connecting gear 42 is fixedly connected to the synchronous wheel 44, a conveyor belt 41 is wound around the transmission wheel 4 and the synchronous wheel 44, and the connecting gear 42 and the transmission gear 43 are engaged with each other to transmit power.

[0046] When the operator opens and closes the left door panel 11, the transmission wheel 4 drives the synchronous wheel 44 to rotate through the conveyor belt 41. The connecting gear 42 on the synchronous wheel 44 is engaged with the transmission gear 43 on the right door panel 11, and the power is transmitted to the right door panel 11. Driven by the transmission gear 43, the right door panel 11 opens and closes synchronously with the left door panel 11, realizing the linkage of the two door panels 11; conversely, if the operator opens and closes the right door panel 11, the transmission gear 43 will drive the connecting gear 42 through meshing, drive the synchronous wheel 44 to rotate, and then drive the left door panel 11 to move synchronously through the conveyor belt 41.

[0047] A shielding frame 1101 is provided on the top of the storage cabinet 1 to shield and protect the mechanical structure in the synchronous opening and closing mechanism. The specific effects are as follows: avoiding accidental collision or damage of external objects (such as experimental equipment and tools) to the connecting gear 42, transmission gear 43, conveyor belt 41, etc.; preventing the operator or others from accidentally touching the moving parts such as gears and belts, reducing the risk of pinching or entanglement; hiding mechanical parts such as gears and winding wires, making the appearance of the equipment more concise and beautiful, etc.

[0048] In this embodiment, through gear meshing and belt transmission, it is ensured that the opening and closing angles and speeds of the two door panels 11 are exactly the same. By opening and closing any one of the door panels 11, the linkage of the two door panels 11 can be realized, improving the operation convenience.

[0049] The technical principles of the embodiments of the present invention are described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the embodiments of the present invention and cannot be interpreted in any way as a limitation on the protection scope of the embodiments of the present invention. Based on the explanations herein, those skilled in the art can think of other specific embodiments of the embodiments of the present invention without creative labor, and these embodiments will fall within the protection scope of the embodiments of the present invention.

Claims

1. A safety protection device for the access behavior of laboratory hazardous chemicals, comprising a storage cabinet (1) and two door panels (11) rotatably connected thereto, characterized in that, A plurality of moving plates (12) are slidably connected inside the storage cabinet (1). A rotary storage rack (18) is provided on the lowermost moving plate (12), and trays (19) are provided on the other moving plates (12) except the lowermost one.

2. The safety protection device for the access behavior of laboratory hazardous chemicals according to claim 1, characterized in that, Symmetrically distributed fixing members (112) are fixedly connected to the lowermost moving plate (12). Symmetrically distributed connecting plates (113) are fixedly connected to the bottom of the second-lowermost moving plate (12), and the connecting plates (113) are sleeved on the adjacent fixing members (112) to form a physical connection between the upper and lower layers. Symmetrically distributed connecting frames (110) are fixedly connected to all the trays (19) except the uppermost one. Symmetrically distributed fixing plates (111) are fixedly connected to the bottoms of the other moving plates (12) except the lowermost two layers, and the fixing plates (111) are sleeved on the adjacent connecting frames (110) to ensure the linkage between the middle layer and the top layer.

3. The safety protection device for the access behavior of laboratory hazardous chemicals according to claim 2, characterized in that, A connecting column (115) is fixedly connected to the bottom of the lowermost moving plate (12). A rotating frame (114) is rotatably connected to the inner side of the bottom wall of the storage cabinet (1). A chute is formed thereon, and the connecting column (115) is embedded in the chute. An arc-shaped connecting member (17) is fixedly connected to the rotating frame (114), and a convex knot is provided in the middle thereof. The connecting member (17) passes through the side wall of the storage cabinet (1). A second magnet (16) is fixedly connected to the end of the connecting member (17), and a first magnet (15) is fixedly connected to the door panel (11) close to the connecting member (17).

4. The safety protection device for the access behavior of laboratory hazardous chemicals according to claim 3, characterized in that, A plurality of storage cylinders (116) are annularly arranged on the upper surface of the rotary storage rack (18) with the center as the midpoint. An axially sliding buffer member (3) is arranged in each storage cylinder (116). A buffer spring (31) is connected between the buffer member (3) and the adjacent storage cylinder (116). A fixing frame (34) is fixedly connected to each buffer member (3). Rotating limiting rods (32) are evenly distributed along the circumferential direction on the inner wall of each storage cylinder (116). A limiting torsion spring (33) is connected between the limiting rod (32) and the adjacent storage cylinder (116), and each limiting torsion spring (33) is wound around the adjacent limiting rod (32).

5. The safety protection device for the access behavior of laboratory hazardous chemicals according to claim 4, characterized in that, An air storage cylinder (2) is fixedly connected to the outer wall of the storage cabinet (1), and an air outlet pipe is provided thereon. The connecting member (17) passes through the air storage cylinder (2). A piston member (21) is fixedly connected to the end of the connecting member (17) close to the second magnet (16), and the piston member (21) slides in the air storage cylinder (2).

6. The safety protection device for the access behavior of laboratory hazardous chemicals according to claim 5, characterized in that, A fixing block (22) is fixedly connected to the end of the piston member (21), and a jack is formed therein. A fixing screw rod (23) is fixedly connected to the adjacent door panel (11). A limiting member (24) is threadedly connected to the fixing screw rod (23), and the limiting member (24) is in clamping fit with the fixing block (22).

7. The safety protection device for the access behavior of laboratory hazardous chemicals according to claim 6, characterized in that, A transmission wheel (4) is provided on the door panel (11) on one side close to the connecting member (17), a transmission gear (43) is provided on the other door panel (11), a rotating synchronous wheel (44) is provided on the storage cabinet (1) on the side close to the transmission gear (43), a connecting gear (42) is fixedly connected to the synchronous wheel (44), a conveyor belt (41) is wound around the transmission wheel (4) and the synchronous wheel (44), and the connecting gear (42) and the transmission gear (43) are meshed with each other.

8. The safety protection device for the access behavior of laboratory hazardous chemicals according to claim 7, wherein, A shielding rack (1101) is provided on the top of the storage cabinet (1).

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