Explosion-proof temporary storage cabinet for laboratory hazardous waste
By introducing catalytic modules and airflow management systems into laboratory waste temporary storage cabinets, the air pollution and explosion risks caused by VOCs gas are solved, and efficient gas purification and environmental protection are achieved.
Patent Information
- Application Number
- CN202411861202.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-03-04
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing laboratory waste temporary storage cabinets are prone to VOCs gas when storing hazardous chemicals, resulting in air pollution and explosion risks.
An explosion-proof temporary storage cabinet is designed, including a catalytic module, a communication pipe, an exhaust pipe and a suction pipe. The VOCs gas is purified through the catalytic module, and the secondary purification of the gas is achieved through the coordination of the exhaust and suction pipes to prevent gas from entering the air.
Effectively remove VOCs gas generated by experimental waste, reduce the risk of explosion, and ensure that the gas does not pollute the environment through secondary purification.
Smart Images
Figure CN119548982A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of temporary storage cabinets, and in particular to an explosion-proof temporary storage cabinet for laboratory hazardous waste. Background Art
[0002] Laboratory waste is generally flammable, explosive and toxic, so its storage before destruction or recycling is very important. If flammable and hazardous chemicals lack a safe storage environment, they are very likely to cause explosions, fires or leakage of toxic chemicals, endangering people's lives and property.
[0003] Existing laboratory waste will produce VOCs gas (volatile organic compounds) when stored in temporary storage cabinets. VOCs gas is one of the main pollutants in the atmosphere. On the one hand, the generated VOCs gas can easily cause air pollution after leaking from the temporary storage cabinet. On the other hand, when a large amount of VOCs gas is stored in the temporary storage cabinet, the concentration of VOCs gas will increase, and there will be a risk of explosion inside the cabinet, which in turn threatens the life and property safety of laboratory staff. Summary of the invention
[0004] The purpose of the present invention is to solve the above problems existing in the prior art and to propose an explosion-proof temporary storage cabinet for laboratory hazardous waste.
[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an explosion-proof temporary storage cabinet for laboratory hazardous waste, comprising a cabinet, a controller is fixedly installed on one side of the cabinet, a catalytic module is fixedly installed at the lower part of the cabinet, the rack is connected to a connecting pipe through a slot opened thereon, the output end of the catalytic module is connected to the connecting pipe, a fixed pipe is fixedly installed at the front end of the rack, the lower end of the fixed pipe is connected to the connecting pipe, one side of the upper part of the fixed pipe is connected to an exhaust pipe, the lower end of the exhaust pipe is connected to an exhaust port, a concentration measuring mechanism is arranged above the exhaust pipe, and an adjusting mechanism is arranged above the fixed pipe; A PID sensor is installed inside the exhaust pipe, and suction pipes connected to the inside of the exhaust pipe are arranged on both the left and right sides below the exhaust pipe, a blocking mechanism is arranged between the suction pipe and the exhaust pipe, and an electric push rod is fixedly installed at one end of the suction pipe away from the exhaust pipe, and the telescopic end of the electric push rod is located inside the suction pipe and is installed with a squeezing mechanism; One end of the air suction pipe away from the exhaust pipe is connected with a connecting pipe, and one end of the connecting pipe away from the air suction pipe is connected with the connecting pipe.
[0006] Preferably, the concentration measuring mechanism, regulating mechanism, blocking mechanism and extruding mechanism are all electrically connected to the controller.
[0007] Preferably, the concentration measuring mechanism comprises a rotating shaft rotatably mounted on the upper part of the exhaust pipe, a rotation speed sensor is mounted on the rotating shaft, and a plurality of blades are fixedly mounted at equal angles on the outer side wall of the rotating shaft.
[0008] Preferably, the adjustment mechanism includes a hydraulic pump fixedly installed on the other side above the fixed pipe, the working end of the hydraulic pump is connected to a hydraulic pipe, a movable block is slidably installed on the upper part of the fixed pipe, a mounting block is fixedly installed on the inner wall of the fixed pipe, the lower end of the mounting block is inserted into the movable block and slidably connected to the movable block, a hydraulic groove is opened on the inner side of the mounting block, a connecting column is sealingly and slidably installed inside the hydraulic groove, and one end of the hydraulic pipe away from the hydraulic pump is connected to the upper part of the hydraulic groove.
[0009] Preferably, the lower surface of the movable block is inclined.
[0010] Preferably, the blocking mechanism includes a slide rail fixedly mounted on one end of the suction duct close to the exhaust duct, an electric slider is slidably mounted on the slide rail, a sealing plate is mounted on the electric slider, a sliding groove is provided at the connection between the suction duct and the exhaust duct, and the sealing plate is slidably connected to the sliding groove.
[0011] Preferably, the extrusion mechanism includes an extrusion plate fixedly mounted on the telescopic end of the electric push rod, the extrusion plate is sealingly and slidingly connected to the inner wall of the suction pipe, the telescopic end of the electric push rod is located at a section between the extrusion plate and the inner wall of the suction pipe and a connecting plate is fixedly mounted thereon, and a sliding sealing assembly is arranged between the connecting plate and the extrusion plate.
[0012] Preferably, the sliding sealing assembly includes a sliding column sliding through the left and right sides of the connecting plate, a spring is sleeved on the outer side of the sliding column, the spring is fixedly connected to the connecting plate, a sealing ball is fixedly connected to one end of the sliding column close to the extrusion plate, a groove corresponding to the position of the sealing ball is opened on the extrusion plate, and the sealing ball is sealingly and slidingly connected to the groove.
[0013] Preferably, the sealing ball is made of soft material.
[0014] Preferably, a one-way valve is installed on the connecting pipe.
[0015] Compared with the prior art, the advantages of the present invention are: 1. The catalytic module in the present application can be used to catalyze the titanium dioxide nanowires stored therein. The titanium dioxide nanowires produce free carboxyl groups under the photocatalytic effect. The output end of the catalytic module is connected to the connecting pipe, so that the free carboxyl groups enter the connecting pipe through the pipeline and come into contact with the VOCs gas, thereby purifying the VOCs gas generated by the experimental waste in the cabinet.
[0016] 2. In the present application, by setting blades, speed sensors, hydraulic pumps and movable blocks, the movable blocks can adjust the flow rate of gas discharged from the fixed pipe, so that the VOCs gas can be purified by titanium dioxide nanowires at the most appropriate flow rate, thereby improving the purification efficiency of the VOCs gas and preventing the explosion inside the cabinet due to excessive VOCs gas concentration.
[0017] 3. In the present application, by setting up the exhaust duct, PID sensor, electric push rod and extrusion plate, when the VOCs in the gas are not completely purified due to high concentration, a negative pressure will be generated inside the suction duct, so that the air that has not been completely purified enters the interior of the suction duct. At this time, the gas inside the suction duct cannot be discharged to the exhaust port, but will enter the connecting pipe under compression, and then pass through the one-way valve on the connecting pipe and re-enter the connecting pipe, so that the gas that has not been completely purified can be purified for a second time, thereby preventing the unpurified gas from entering the air and polluting the environment.
[0018] To sum up, through the setting of the above-mentioned structure, the present application can, on the one hand, purify the VOCs gas generated by experimental waste to prevent it from exploding inside the cabinet, and on the other hand, it can also enable the gas that has not been completely purified to be secondary purified to prevent the unpurified gas from entering the air and polluting the environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the overall structure of an explosion-proof temporary storage cabinet for laboratory hazardous waste proposed by the present invention; Figure 2 This is a schematic diagram of a half-section axonometric structure of an explosion-proof temporary storage cabinet for laboratory hazardous waste proposed by the present invention; Figure 3 This is a schematic diagram of the cross-sectional isometric structure of a connecting pipe of an explosion-proof temporary storage cabinet for laboratory hazardous waste proposed by the present invention; Figure 4 This is a structural schematic diagram of a hydraulic pump and a fixed pipe part of an explosion-proof temporary storage cabinet for laboratory hazardous waste proposed by the present invention; Figure 5 This is a schematic diagram of a half-section axonometric structure of a fixed pipe of an explosion-proof temporary storage cabinet for laboratory hazardous waste proposed by the present invention; Figure 6 A schematic diagram of the movable blocks and hydraulic structure of an explosion-proof temporary storage cabinet for laboratory hazardous waste proposed by the present invention; Figure 7 This is a schematic structural diagram of the rotating shaft and blade parts of an explosion-proof temporary storage cabinet for laboratory hazardous waste proposed by the present invention; Figure 8 This is a schematic structural diagram of the exhaust pipe and suction pipe parts of an explosion-proof temporary storage cabinet for laboratory hazardous waste proposed by the present invention; Fig. 9 This is a schematic diagram of the half-section axonometric structure of an exhaust duct and an air suction duct of an explosion-proof temporary storage cabinet for laboratory hazardous waste proposed by the present invention; Fig.10 This is a schematic diagram of a half-section axonometric structure of an air suction pipe of an explosion-proof temporary storage cabinet for laboratory hazardous wastes proposed by the present invention; Fig.11 This is a schematic diagram of a half-section axonometric structure of an extrusion block of an explosion-proof temporary storage cabinet for laboratory hazardous wastes proposed by the present invention; Fig.12 This is a schematic diagram of the semi-sectioned axonometric structure of an extrusion block and an air suction pipe of an explosion-proof temporary storage cabinet for laboratory hazardous waste proposed by the present invention.
[0020] In the figure: 1 cabinet, 11 controller, 12 catalytic module, 13 rack, 14 connecting pipe, 15 exhaust port, 2 fixed pipe, 21 hydraulic pump, 211 hydraulic pipe, 22 mounting block, 23 movable block, 24 hydraulic groove, 25 connecting column, 3 rotating shaft, 31 blade, 32 speed sensor, 4 exhaust pipe, 41 PID sensor, 42 suction pipe, 43 slide rail, 44 electric slide block, 45 sealing plate, 46 connecting pipe, 47 one-way valve, 5 electric push rod, 51 extrusion plate, 52 connecting plate, 53 sealing ball, 54 slide column, 55 spring. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0022] Reference Figures 1 to 12 , an explosion-proof temporary storage cabinet for laboratory hazardous waste, including a cabinet 1, a controller 11 is fixedly installed on one side of the cabinet 1, the controller 11 is a prior art and is used to control the operation of the entire device, a catalytic module 12 is fixedly installed at the lower part of the cabinet 1, the catalytic module 12 is a prior art, and its specific structural design is no longer repeated here, the catalytic module 12 is used to catalyze the titanium dioxide nanowires stored therein, and the titanium dioxide nanowires produce free carboxyl groups under the photocatalytic effect, and the rack 13 is connected to the connecting pipe 14 through the groove opened thereon, and the connecting pipe 14 is located on the inner side of the cabinet 1, and the output end of the catalytic module 12 is connected to the connecting pipe 14, so that the free carboxyl groups enter the connecting pipe 14 through the pipeline, and contact with the VOCs gas, thereby purifying the VOCs gas generated by the experimental waste in the cabinet 1.
[0023] A fixed pipe 2 is fixedly installed at the front end of the storage rack 13, the lower end of the fixed pipe 2 is connected to the connecting pipe 14, the upper side of the fixed pipe 2 is connected to the exhaust pipe 4, and a rotating shaft 3 is rotatably installed on the upper part of the exhaust pipe 4. A speed sensor 32 is installed on the rotating shaft 3. The speed sensor 32 is a prior art and is used to monitor the speed of the rotating shaft 3. The speed sensor 32 is electrically connected to the controller 11, and a plurality of blades 31 are fixedly installed at equal angles on the outer wall of the rotating shaft 3.
[0024] A hydraulic pump 21 is fixedly installed on the other side above the fixed pipe 2, and the hydraulic pump 21 is electrically connected to the controller 11. A hydraulic pipe 211 is connected to the working end of the hydraulic pump 21. A movable block 23 is slidably installed on the upper part of the fixed pipe 2. A mounting block 22 is fixedly installed on the inner wall of the fixed pipe 2. The lower end of the mounting block 22 is inserted into the movable block 23 and is slidably connected to the movable block 23. A hydraulic groove 24 is opened on the inner side of the mounting block 22, and a connecting column 25 is sealed and slidably installed inside the hydraulic groove 24. The end of the hydraulic pipe 211 away from the hydraulic pump 21 is connected to the upper part of the hydraulic groove 24, so that the hydraulic pump 21 injects hydraulic oil into the hydraulic groove 24 to drive the connecting column 25 to move up and down inside the hydraulic groove 24, thereby driving the movable block 23 to move up and down inside the fixed pipe 2.
[0025] A PID sensor 41 is installed inside the exhaust pipe 4 . The PID sensor 41 is a prior art and is used to monitor the content of VOCs in the gas. The PID sensor 41 is electrically connected to the controller 11 .
[0026] Suction ducts 42 connected to the interior of the exhaust duct 4 are provided on both left and right sides below the exhaust duct 4. A slide rail 43 is fixedly installed at one end of the suction duct 42 close to the exhaust duct 4. An electric slider 44 is slidably installed on the slide rail 43. A sealing plate 45 is installed on the electric slider 44. A sliding groove is provided at the connection between the suction duct 42 and the exhaust duct 4. The sealing plate 45 is slidably connected to the sliding groove, so that when the sealing plate 45 slides into the sliding groove, the sealing plate 45 can disconnect the suction duct 42 and the exhaust duct 4, so that the gas inside the exhaust duct 4 can no longer enter the suction duct 42.
[0027] An electric push rod 5 is fixedly installed on one end of the suction pipe 42 away from the exhaust pipe 4, and the electric push rod 5 is electrically connected to the controller 11. The telescopic end of the electric push rod 5 is located inside the suction pipe 42 and is fixedly connected to an extrusion plate 51. The extrusion plate 51 is sealingly and slidably connected to the inner wall of the suction pipe 42. The telescopic end of the electric push rod 5 is located on a section of the extrusion plate 51 and the inner wall of the suction pipe 42, and a connecting plate 52 is fixedly installed. Sliding columns 54 are slidably installed on both sides of the connecting plate 52. A spring 55 is sleeved on the outer side of the sliding column 54, and the spring 55 is fixedly connected to the connecting plate 52. A sealing ball 53 is fixedly connected to the end of the sliding column 54 close to the extrusion plate 51. A groove corresponding to the position of the sealing ball 53 is opened on the extrusion plate 51, and the sealing ball 53 is sealingly and slidably connected to the groove. The sealing ball 53 is made of soft materials such as rubber and is easy to deform.
[0028] The end of the suction pipe 42 away from the exhaust pipe 4 is connected to a connecting pipe 46, on which a one-way valve 47 is installed, and the end of the connecting pipe 46 away from the suction pipe 42 is connected to the connecting pipe 14. Thus, the gas that has not been completely purified can enter the connecting pipe 14 again for secondary purification, thereby preventing the gas that has not been purified from entering the air and polluting the environment. The lower end of the exhaust pipe 4 is connected to an exhaust port 15.
[0029] The specific working principle of the present invention is as follows. When it is necessary to treat hazardous waste in the laboratory, the experimental waste is placed in the rack 13 in the cabinet 1, and then the cabinet door is closed. Since the experimental waste will produce VOCs gas, the VOCs gas will enter the connecting pipe 14 through the slots on the rack 13. At this time, the controller 11 is turned on, so that the controller 11 starts the catalytic module 12 to catalyze the titanium dioxide nanowires. The titanium dioxide nanowires are photocatalytically affected to produce free carboxyl groups, and then the free carboxyl groups enter the connecting pipe 14 through the pipeline, and contact with the VOCs gas to purify the VOCs gas generated by the experimental waste in the cabinet 1. The purified gas will then enter the exhaust port 15 along the fixed pipe 2 and the exhaust pipe 4, and then be discharged into the atmosphere through the exhaust port 15.
[0030] Since VOCs gas needs to maintain a certain flow rate to achieve maximum efficiency when being purified by titanium dioxide nanowires, and the amount of experimental waste will affect the concentration of VOCs gas, the flow rate of VOCs will be affected by the concentration, so the flow rate of VOCs gas needs to be controlled. When VOCs gas enters the fixed tube 2 through the connecting tube 14, it will generate thrust on the blades 31. The blades 31 will be driven by the thrust to rotate along the inner wall of the fixed tube 2. The rotation of the shaft 3 will cause the speed sensor 32 to generate an electrical signal. The speed sensor 32 will generate an electrical signal and send it to the controller 11. When the concentration of the gas is low, the frequency of the blades 31 driving the shaft 3 to rotate will increase. At this time, the speed sensor 32 will send an electrical signal to the controller 11. At this time, the controller 11 will start the hydraulic pump 21. The hydraulic pump 21 will transport the hydraulic oil through the hydraulic pipe 211 to the hydraulic tank 24 opened inside the mounting block 22. At this time, the internal pressure of the hydraulic tank 24 will increase, which will cause The hydraulic oil inside the hydraulic groove 24 generates a thrust on the connecting column 25, so that the connecting column 25 drives the movable block 23 to slide along the outer wall of the mounting block 22. When the movable block 23 slides, the flow rate of the gas discharged from the fixed pipe 2 will be reduced. At this time, the flow rate of the gas will be limited. When the concentration of the gas is high, it is only necessary to increase the space of the gas discharged from the fixed pipe 2 by the movable block 23 to maintain a suitable flow rate, so that the flow rate of the gas discharged from the fixed pipe 2 can be adjusted through the movable block 23, so that the VOCs gas can be purified by the titanium dioxide nanowires at the most suitable flow rate, thereby improving the purification efficiency of the VOCs gas and preventing the explosion inside the cabinet 1 caused by the excessive concentration of the VOCs gas.
[0031] When the purified gas is discharged through the fixed pipe 2, it will enter the exhaust pipe 4. When the gas is discharged to the exhaust port 15 through the exhaust pipe 4, the PID sensor 41 installed inside the exhaust pipe 4 will detect the content of VOCs in the gas. When the VOCs in the gas are not completely purified due to the high concentration, the PID sensor 41 will send an electrical signal to the controller 11. At this time, the controller 11 will start the electric push rod 5, so that the electric push rod 5 drives the squeezing plate 51 to contract. The squeezing plate 51 contracts and slides along the inner wall of the suction pipe 42. At this time, negative pressure will be generated inside the suction pipe 42, so that the air that is not completely purified will enter the interior of the suction pipe 42. At this time, the controller 11 will start the electric slider 44 to slide along the inner wall of the slide rail 43, so that the electric slider 44 drives the sealing plate 45 to seal the suction pipe 42. At this time, the gas inside the suction pipe 42 cannot be discharged to the exhaust port 15. When the sealing plate 45 seals the suction pipe 42, the electric push rod 5 is started. The electric push rod 5 drives the squeezing plate 51 to reset. When the squeezing plate 51 is pushed by the electric push rod 5, the gas that has not been completely purified inside the suction pipe 42 will be squeezed, and the squeezing of the gas will generate a thrust on the sealing ball 53, so that the sealing ball 53 generates a thrust on the sliding column 54. The sliding column 54 is pushed and squeezes the spring 55 and slides along the inner wall of the connecting plate 52. At this time, the sealing ball 53 will release the restriction on the groove provided on the squeezing plate 51, so that the gas can enter the end of the squeezing plate 51 away from the sealing plate 45 through the groove. At this time, the electric push rod 5 is continued to be started until the squeezing plate 51 is fitted with the sealing plate 45, and then the electric push rod 5 is started to contract, so that the electric push rod 5 drives the squeezing plate 51 to squeeze the air. At this time, the air is squeezed to enter the connecting pipe 46, and then passes through the one-way valve 47 on the connecting pipe 46 and re-enters the connecting pipe 14, so that the gas that has not been completely purified can be purified for a second time, thereby preventing the unpurified gas from entering the air and polluting the environment.
[0032] 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 principle of the present invention should be included in the protection scope of the present invention.
Claims
1. An explosion-proof temporary storage cabinet for laboratory hazardous waste, comprising a cabinet body (1), a controller (11) fixedly mounted on one side of the cabinet body (1), and a catalytic module (12) fixedly mounted at the lower part of the cabinet body (1), characterized in that: The storage rack (13) is connected to a connecting pipe (14) through a slot provided thereon, the output end of the catalytic module (12) is connected to the connecting pipe (14), a fixed pipe (2) is fixedly installed at the front end of the storage rack (13), the lower end of the fixed pipe (2) is connected to the connecting pipe (14), the upper side of the fixed pipe (2) is connected to an exhaust pipe (4), the lower end of the exhaust pipe (4) is connected to an exhaust port (15), a concentration measuring mechanism is provided above the exhaust pipe (4), and an adjustment mechanism is provided above the fixed pipe (2); A PID sensor (41) is installed inside the exhaust pipe (4); suction pipes (42) are provided on both left and right sides below the exhaust pipe (4) and are connected to the inside of the exhaust pipe (4); a blocking mechanism is provided between the suction pipe (42) and the exhaust pipe (4); an electric push rod (5) is fixedly installed at one end of the suction pipe (42) away from the exhaust pipe (4); the telescopic end of the electric push rod (5) is located inside the suction pipe (42) and is provided with a squeezing mechanism; An end of the air suction pipe (42) away from the air exhaust pipe (4) is connected to a connecting pipe (46), and an end of the connecting pipe (46) away from the air suction pipe (42) is connected to the connecting pipe (14).
2. The explosion-proof temporary storage cabinet for laboratory hazardous waste according to claim 1, characterized in that: The concentration measuring mechanism, regulating mechanism, blocking mechanism and extrusion mechanism are all electrically connected to the controller (11).
3. The explosion-proof temporary storage cabinet for laboratory hazardous waste according to claim 1, characterized in that: The concentration measuring mechanism comprises a rotating shaft (3) rotatably mounted on the upper part of the exhaust pipe (4), a rotation speed sensor (32) being mounted on the rotating shaft (3), and a plurality of blades (31) being fixedly mounted at equal angles on the outer wall of the rotating shaft (3).
4. The explosion-proof temporary storage cabinet for laboratory hazardous waste according to claim 1, characterized in that: The adjustment mechanism comprises a hydraulic pump (21) fixedly mounted on the other side above the fixed pipe (2); the working end of the hydraulic pump (21) is connected to a hydraulic pipe (211); a movable block (23) is slidably mounted on the upper part of the fixed pipe (2); a mounting block (22) is fixedly mounted on the inner wall of the fixed pipe (2); the lower end of the mounting block (22) is inserted into the movable block (23) and is slidably connected to the movable block (23); a hydraulic groove (24) is provided on the inner side of the mounting block (22); a connecting column (25) is sealingly slidably mounted inside the hydraulic groove (24); and one end of the hydraulic pipe (211) away from the hydraulic pump (21) is connected to the upper part of the inner part of the hydraulic groove (24).
5. The explosion-proof temporary storage cabinet for laboratory hazardous waste according to claim 4, characterized in that: The lower surface of the movable block (23) is arranged in an inclined manner.
6. The explosion-proof temporary storage cabinet for laboratory hazardous waste according to claim 1, characterized in that: The blocking mechanism comprises a slide rail (43) fixedly mounted on one end of the air suction pipe (42) close to the air exhaust pipe (4), an electric slider (44) being slidably mounted on the slide rail (43), a sealing plate (45) being mounted on the electric slider (44), a sliding groove being provided at the connection between the air suction pipe (42) and the air exhaust pipe (4), and the sealing plate (45) being slidably connected to the sliding groove.
7. The explosion-proof temporary storage cabinet for laboratory hazardous waste according to claim 1, characterized in that: The squeezing mechanism comprises a squeezing plate (51) fixedly mounted on the telescopic end of the electric push rod (5), the squeezing plate (51) being sealingly and slidably connected to the inner wall of the air suction pipe (42), a connecting plate (52) being fixedly mounted on a section of the inner wall of the squeezing plate (51) and the air suction pipe (42) at the telescopic end of the electric push rod (5), and a sliding sealing assembly being arranged between the connecting plate (52) and the squeezing plate (51).
8. The explosion-proof temporary storage cabinet for laboratory hazardous waste according to claim 7, characterized in that: The sliding seal assembly comprises a sliding column (54) slidingly penetrating the left and right sides of the connecting plate (52); a spring (55) is sleeved on the outer side of the sliding column (54); the spring (55) is fixedly connected to the connecting plate (52); a sealing ball (53) is fixedly connected to one end of the sliding column (54) close to the extrusion plate (51); a groove corresponding to the position of the sealing ball (53) is formed on the extrusion plate (51); and the sealing ball (53) is sealingly and slidingly connected to the groove.
9. The explosion-proof temporary storage cabinet for laboratory hazardous waste according to claim 8, characterized in that: The sealing ball (53) is made of soft material.
10. The explosion-proof temporary storage cabinet for laboratory hazardous waste according to claim 1, characterized in that: A one-way valve (47) is installed on the connecting pipe (46).