Explosion-proof workbench for hazardous waste laboratory

Abstract

The utility model provides an explosion-proof workbench for a hazardous waste laboratory, and relates to the field of laboratory workbenches. The hazardous waste laboratory anti-explosion workbench comprises a workbench body, a protective door and supporting legs, the protective door and the supporting legs are installed on the workbench body, a pipeline is rotatably installed in the workbench body, one end of the pipeline is arranged in a sealed mode, the outer surface of the pipeline is communicated with a plurality of fixing cylinders A and a plurality of fixing cylinders B, and the fixing cylinders A and the fixing cylinders B are distributed in a staggered mode; according to the explosion-proof working table for the hazardous waste laboratory, the output power of the water pump can be automatically controlled according to the state in the working table body, when the interior of the working table body is in a safe state, the atomization spray head can spray mist, dust fall can be achieved, the probability of static electricity generation can be reduced, and when flames or smoke appears in the working table body, the atomization spray head can spray mist. And when the output power of the water pump is increased, the water spraying head is opened to cool the dangerous waste, so that the probability of explosion is reduced.

Description

Technical Field

[0001] The utility model relates to the field of laboratory workbenches, in particular to an explosion-proof workbench for hazardous waste laboratories. Background Art

[0002] In hazardous waste laboratories, various hazardous wastes are often handled, which may contain flammable and explosive chemicals. These substances are very likely to explode under certain conditions, such as when encountering fire, high temperature, electrostatic discharge, etc. For example, some organic solvents, flammable gases, explosive dust, etc., once an explosion occurs, will produce huge destructive power and cause serious harm to laboratory personnel, equipment and the surrounding environment; and experimental operations in hazardous waste laboratories often involve heating, stirring, distillation, extraction and other processes. These processes may generate sparks, static electricity or high temperature. The dangerous factors generated by these operations may cause explosions, so the workbench needs to use a workbench with explosion-proof function.

[0003] Traditional explosion-proof workbenches usually use high-strength metal materials, such as thickened steel plates, to construct the workbench frame and cabinet structure to enhance impact resistance. In order to ensure that the workbench can withstand the impact force generated by the explosion and prevent the workbench from breaking and fragments from flying, thereby protecting the operator and the surrounding environment, the metal materials used are prone to generate static electricity during mutual friction and collision. When moving experimental equipment on the workbench or opening or closing cabinet doors, these actions may cause friction and collision between metal parts, thereby generating static electricity. There are usually various flammable substances in the test workbench of the hazardous waste laboratory. When static discharge generates sparks, its energy is enough to ignite the flammable gas, flammable liquid vapor or combustible dust in the workbench, and increase the probability of explosion. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides an explosion-proof workbench for hazardous waste laboratories, which can automatically control the output power of the water pump according to the state inside the workbench body. When the workbench body is in a relatively safe state, the atomizing nozzle can spray, which not only reduces dust but also reduces the probability of static electricity generation. When flames or smoke appear in the workbench body, when the output power of the water pump increases, the sprinkler head opens to cool the hazardous waste and reduce the probability of explosion.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a hazardous waste laboratory explosion-proof workbench, comprising a workbench body and a protective door and legs installed on the workbench body, a pipe rotatably installed in the workbench body, one end of the pipe is sealed, and the outer surface of the pipe is connected with a plurality of fixed cylinders A and a plurality of fixed cylinders B, which are staggered, and an atomizing nozzle for spraying and a water spraying head for spraying are respectively installed at one end of the fixed cylinder A and the fixed cylinder B, and a sealing component for opening is installed inside the fixed cylinder B.

[0006] The workbench also includes a water hole, a cavity, a water collecting trough, a slag discharge trough and a slag discharge pipe which are connected in sequence. A valve is installed at one end of the slag discharge pipe. A water supply mechanism for supplying water to the pipeline is installed on one side of the workbench body. A control component for controlling the water spraying of the sprinkler head is fixedly installed inside the workbench.

[0007] Preferably, a one-way valve is installed inside each of the fixed cylinders A and is used to open in a direction close to the water spray head.

[0008] Preferably, the sealing assembly includes two semicircular sealing plates and two L-shaped elastic parts, one end of the spring part is fixedly connected to the fixed tube B, and the other end is fixedly embedded in the sealing plate. The sealing plate is in close contact with one of the water outlet ends of the fixed tube B, and the two sealing plates are in close contact with one side thereof.

[0009] Preferably, a motor for controlling the swing of the water spray head and the atomizing nozzle is fixedly mounted on one side of the workbench body through a bracket, and the output end of the motor is fixedly connected to one end of the pipeline.

[0010] Preferably, the water delivery mechanism includes a water pump, a water outlet pipe and a water inlet pipe. The water outlet pipe and the pipe are rotatably installed at one end close to each other, and the intersection of the two is sealed. The other end of the water outlet pipe is connected to the drainage end of the water pump, and one end of the water inlet pipe is connected to the water inlet end of the water pump, and the other end is connected to the water collection tank.

[0011] Preferably, the control component includes a dual-spectrum detector, a central control unit and a relay. The dual-spectrum detector and the central control unit are connected by a multi-core cable. The digital output pin of the central control unit is connected to the control end of the relay, and the relay is used to control the power supply line of the water pump.

[0012] Preferably, a grounding wire is installed between the workbench body and the ground.

[0013] Preferably, a water baffle is fixedly installed at the edge of the upper surface of the workbench body.

[0014] Compared with the prior art, the utility model has the following beneficial effects: through the setting of the control component, the output power of the water pump can be automatically controlled according to the state inside the workbench body. When the workbench body is in a relatively safe state, the atomizing nozzle can spray, which not only reduces dust but also reduces the probability of static electricity generation. When flames or smoke appear in the workbench body, the detector detects the flames or smoke, and generates a corresponding electrical signal and transmits it to the central control unit. The signal output by the microcontroller is used to control the state of the relay, and then the output power of the water pump is controlled by the state of the relay. When the output power of the water pump is low, the atomizing nozzle is opened and the water spray head is closed. When the output power of the water pump increases, the water spray head is opened to cool the hazardous waste and reduce the probability of explosion. Moreover, the water pump can be circulated and practical, saving water resources, and the atomizing nozzle and the water spray head can swing to increase the water coverage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the workbench body of the utility model when the protective door is closed;

[0017] Figure 3 This is a side view of the water delivery mechanism of the utility model;

[0018] Figure 4 It is a cross-sectional view of the workbench body and the front view of the pipeline of the utility model;

[0019] Figure 5 It is a cross-sectional view of the workbench body and the side view of the pipeline of the utility model;

[0020] Figure 6 A sectional view of a side view of the sealing assembly of the present invention;

[0021] Figure 7 This is a top view of the sealing component of the present invention.

[0022] Among them: 1. Workbench body; 21. Water hole; 22. Cavity; 23. Water collecting trough; 24. Slag discharge trough; 25. Slag discharge pipe; 2. Pipeline; 3. Fixed cylinder A; 4. Fixed cylinder B; 5. Atomizing nozzle; 6. Water spray head; 7. Sealing assembly; 701. Sealing plate; 702. Elastic part; 8. Water delivery mechanism; 801. Water pump; 802. Water outlet pipe; 803. Water inlet pipe; 9. One-way valve; 10. Motor; 11. Dual-spectrum detector; 12. Central control unit; 13. Relay; 14. Grounding wire; 15. Water baffle. DETAILED DESCRIPTION

[0023] like Figure 1-Figure 7As shown, a hazardous waste laboratory explosion-proof workbench includes a workbench body 1 and a protective door and legs installed at the workbench body 1. A pipe 2 is rotatably installed in the workbench body 1, one end of the pipe 2 is sealed, and the outer surface of the pipe 2 is connected to several fixed cylinders A3 and several fixed cylinders B4. A one-way valve 9 is installed inside each fixed cylinder A3 and is used to open in the direction close to the water spray head 6. When the water pressure in the pipe 2 increases, the several one-way valves 9 can be opened at the same time, which is conducive to several atomizing nozzles 5 to spray water mist evenly. The fixed cylinders A3 and the fixed cylinders B4 are staggered. One end of the fixed cylinder A3 and the fixed cylinder B4 are respectively equipped with an atomizing nozzle 5 for spraying and a water spray head 6 for spraying water. When the atomizing nozzle 5 sprays, it can increase the humidity in the working area of ​​the workbench body 1. On the one hand, it is used to reduce the probability of static electricity generation, and on the other hand, it can achieve the purpose of dust reduction. When the water spray head 6 sprays water, it can extinguish smoke and fire, and the work A motor 10 for controlling the swing of the water spray head 6 and the atomizing nozzle 5 is fixedly installed on one side of the workbench body 1 through a bracket. The output end of the motor 10 is fixedly connected to one end of the pipe 2. A sealing assembly 7 for opening is installed inside the fixed cylinder B4. The sealing assembly 7 includes two semicircular sealing plates 701 and two L-shaped elastic members 702. One end of the spring member is fixedly connected to the fixed cylinder B4, and the other end is fixedly embedded in the sealing plate 701. The sealing plate 701 is in close contact with one of the water outlet ends of the fixed cylinder B4, and the side surfaces of the two sealing plates 701 are in close contact and are rounded. When the water pressure in the pipe 2 is lower than a predetermined value, the elastic force of the elastic member 702 causes the sealing plate 701 to seal the water outlet end of the fixed cylinder B4. When the water pressure in the pipe 2 exceeds the predetermined value, the water pressure inside the fixed cylinder B4 is relatively large, which can overcome the elastic force of the elastic member 702 and cause the two sealing plates 701 to open, thereby helping the water spray head 6 to spray water.

[0024] The workbench also includes a water hole 21, a cavity 22, a water collecting trough 23, a slag discharge trough 24 and a slag discharge pipe 25 connected in sequence. There are several water holes 21, and a valve is installed at one end of the slag discharge pipe 25. A water supply mechanism 8 for supplying water to the pipeline 2 is installed on one side of the workbench body 1. The water supply mechanism 8 includes a water pump 801, an outlet pipe 802 and an inlet pipe 803. The outlet pipe 802 is rotatably installed at one end close to the pipeline 2, and the intersection of the two is sealed. The other end of the outlet pipe 802 is connected to the drainage end of the water pump 801, and the inlet pipe 803 is connected to the drainage end of the water pump 801. One end is connected to the water inlet end of the water pump 801, and the other end is connected to the water collection tank 23. The water collection tank 23 is filled with water to realize water circulation. A control component for controlling the water spraying of the sprinkler head 6 is fixedly installed inside the workbench. The control component includes a dual-spectrum detector 11, a central control unit 12 and a relay 13. The dual-spectrum detector 11 and the central control unit 12 are connected by a multi-core cable. The digital output pin of the central control unit 12 is connected to the control end of the relay 13. The relay 13 is used to control the power supply line of the water pump 801. The spectrum detector 11, the central control unit 12 and the relay 13 are all energized. The dual-spectrum detector 11 is used to detect flames and smoke in the workbench. When the detector detects flames or smoke, it generates a corresponding electrical signal and transmits it to the central control unit 12. The central control unit 12 is a microcontroller. When the microcontroller detects the fire or smoke signal from the dual-spectrum detector 11 and determines through an internal program that the water pump 801 needs to be started to increase the water pressure, the digital output pin of the microcontroller will output a high level, such as 5V, or a low level, such as 0V. This signal is used to control the state of the relay 13, and then the output power of the water pump 801 is controlled by the state of the relay 13. When the output power of the water pump 801 is low, the atomizing nozzle 5 is turned on and the water spray head 6 is turned off. When the output power of the water pump 801 increases, the water spray head 6 is turned on. A grounding wire 14 is installed between the workbench body 1 and the ground to further eliminate static electricity. A water baffle 15 is fixedly installed on the edge of the upper surface of the workbench body 1 to prevent water from flowing out of the upper surface of the workbench body 1 during the water spraying process.

[0025] Working principle:

[0026] First, the hazardous waste required for the flammability and explosion test is placed in the working area of ​​the workbench body 1, that is, above the water hole 21. Figure 2As shown, the protective door at the workbench body 1 can be closed to avoid the situation where fragments splash when hazardous waste explodes and cause harm to people; during the test, it is necessary to start the water pump 801 and the motor 10. The water pump 801 draws the water in the water collection tank 23 from the water inlet pipe 803 to the water outlet pipe 802, and transports it to the pipeline 2. Part of the water in the pipeline 2 enters the fixed cylinder A3, and the other part of the water enters the fixed cylinder B4. The water in the fixed cylinder A3 forces the one-way valve 9 to open under the action of water pressure, and then enters the atomizing nozzle 5. The atomizing nozzle 5 sprays water mist, which increases the air humidity in the working area of ​​the workbench body 1. Water molecules can be adsorbed on the surface of the object, so that the conductivity of the surface of the object is enhanced. In this way, electrostatic charge is not easy to accumulate, but will be conducted and dissipated through water molecules. Generally speaking, when the relative humidity reaches 65%-70%, static electricity is generated. The possibility of electrostatic discharge generating sparks is greatly reduced, thereby reducing the probability of explosion due to static electricity; when the motor 10 is started, it drives the pipe 2 to rotate, and the pipe 2 drives the fixed cylinder A3 and the fixed cylinder B4 to swing continuously, thereby causing the atomizing nozzle 5 to swing, so as to increase the spray range and make the spray work more uniform, which helps to eliminate static electricity, and the purpose of dust reduction can be achieved by spraying, preventing dust and smoke from being emitted when the protective door is opened, and avoiding dust and smoke from polluting the environment. It should be noted that when hazardous waste does not explode or a large amount of smoke appears, the output power of the water pump 801 should be low. At this time, the water pressure in the fixed cylinder B4 is low. Under the support of the elastic member 702, the sealing plate 701 will not open and is in a state of sealing the fixed cylinder B4, so that the water head 6 does not work.

[0027] Next, when the hazardous waste in the workbench body 1 explodes or a large amount of smoke appears, the dual-spectrum detector 11 is set to detect the flame and smoke in the workbench. The dual-spectrum detector 11 combines infrared and ultraviolet detection technology. The infrared sensor is sensitive to the infrared rays of a specific wavelength generated by the flame and can detect the thermal radiation of the flame. The ultraviolet sensor is sensitive to the ultraviolet rays of a specific wavelength generated in the flame and can detect the ultraviolet radiation emitted when the flame burns. By monitoring these two spectra at the same time, smoke and flames can be effectively detected. When the dual-spectrum detector 11 detects flame or smoke, it will generate a corresponding electrical signal and transmit it to the central control unit 12. The central control unit 12 is a microcontroller. When the microcontroller detects the fire or smoke signal from the dual-spectrum detector 11 and determines through the internal program that the water pump 801 needs to be started to increase the water pressure, the microcontroller The digital output pin of the controller will output a high level, such as 5V or a low level, such as a 0V signal. This signal is used to control the state of the relay 13, and then control the output power of the water pump 801 through the state of the relay 13. At this time, the output power of the water pump 801 increases, and the water pressure in the pipe 2 increases, and then the water pressure in the fixed cylinder B4 increases, and overcomes the resistance of the elastic member 702, so that the sealing plate 701 opens, and the sprinkler head 6 starts to spray water. The sprayed water can extinguish the flame and cool the hazardous waste to reduce the probability of explosion of the hazardous waste. When the fixed cylinder B4 swings, it can drive the sprinkler head 6 to swing, thereby increasing the water spray range to improve the fire extinguishing efficiency. As the water pressure in the pipe 2 increases, the spray intensity of the atomizing nozzle 5 increases. The cooperation between the atomizing nozzle 5 and the sprinkler head 6 can quickly reduce dust and quickly eliminate smoke to prevent smoke from spreading outside the workbench body 1.

[0028] Finally, it should be noted that since the water hole 21, cavity 22, water collecting trough 23, slag discharge trough 24 and slag discharge pipe 25 are connected in sequence, the sprayed water can enter the cavity 22, water collecting trough 23, slag discharge trough 24 and slag discharge pipe 25 in sequence through several water holes 21, and dust and foreign matter will settle in the slag discharge trough 24, and the foreign matter will be discharged by opening the valve; moreover, since the water inlet pipe 803 is connected to the water collecting trough 23, the water in the water inlet trough can pass through the water inlet pipe 803, water pump 801, water outlet pipe 802 and pipeline 2 in sequence under the action of the water pump 801, and be sprayed out from the water nozzle 6 and the atomizing nozzle 5. The sprayed water can enter the cavity 22 through the water hole 21 and then enter the water inlet trough, thereby realizing water circulation and saving water resources.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hazardous waste laboratory explosion-proof workbench, comprising a workbench body (1) and a protective door and legs installed at the workbench body (1), characterized in that: A pipe (2) is rotatably mounted in the workbench body (1), one end of the pipe (2) is sealed, and the outer surface of the pipe (2) is connected to a plurality of fixed cylinders A (3) and a plurality of fixed cylinders B (4), the fixed cylinders A (3) and the fixed cylinders B (4) are staggered, and an atomizing nozzle (5) for spraying and a water spraying head (6) for spraying water are respectively mounted on one end of the fixed cylinder A (3) and the fixed cylinder B (4), and a sealing assembly (7) for opening is mounted inside the fixed cylinder B (4); The workbench further comprises a water hole (21), a cavity (22), a water collecting trough (23), a slag discharge trough (24) and a slag discharge pipe (25) which are connected in sequence. A valve is installed at one end of the slag discharge pipe (25). A water supply mechanism (8) for supplying water to the pipeline (2) is installed on one side of the workbench body (1). A regulating assembly for controlling the water spraying of the water spray head (6) is fixedly installed inside the workbench.

2. The explosion-proof workbench for hazardous waste laboratory according to claim 1, characterized in that: A one-way valve (9) is installed inside each fixed cylinder A (3) and is used to open in a direction close to the water spray head (6).

3. The explosion-proof workbench for hazardous waste laboratory according to claim 1, characterized in that: The sealing assembly (7) comprises two semicircular sealing plates (701) and two L-shaped elastic members (702), one end of the spring member being fixedly connected to the fixed cylinder B (4), and the other end being fixedly embedded in the sealing plate (701), the sealing plate (701) being in close contact with one of the water outlet ends of the fixed cylinder B (4), and the adjacent side surfaces of the two sealing plates (701) being in close contact.

4. The explosion-proof workbench for hazardous waste laboratory according to claim 1, characterized in that: A motor (10) for controlling the swing of the water spray head (6) and the atomizing spray head (5) is fixedly mounted on one side of the workbench body (1) via a bracket, and an output end of the motor (10) is fixedly connected to one end of the pipe (2).

5. The explosion-proof workbench for hazardous waste laboratory according to claim 1, characterized in that: The water delivery mechanism (8) comprises a water pump (801), a water outlet pipe (802) and a water inlet pipe (803). The water outlet pipe (802) and the pipe (2) are rotatably mounted at one end close to each other, and the intersection of the two is sealed. The other end of the water outlet pipe (802) is connected to the drainage end of the water pump (801). One end of the water inlet pipe (803) is connected to the water inlet end of the water pump (801), and the other end is connected to the water collecting tank (23).

6. The explosion-proof workbench for hazardous waste laboratory according to claim 1, characterized in that: The control component includes a dual-spectrum detector (11), a central control unit (12) and a relay (13). The dual-spectrum detector (11) and the central control unit (12) are connected via a multi-core cable. The digital output pin of the central control unit (12) is connected to the control end of the relay (13). The relay (13) is used to control the power supply line of the water pump (801).

7. The explosion-proof workbench for hazardous waste laboratory according to claim 1, characterized in that: A grounding wire (14) is installed between the workbench body (1) and the ground.

8. The explosion-proof workbench for hazardous waste laboratory according to claim 1, characterized in that: A water baffle (15) is fixedly installed at the edge of the upper surface of the workbench body (1).

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