A laboratory safety ventilation device

Abstract

The utility model relates to experimental safety protection technical field, concretely discloses a laboratory safety ventilation device, including mounting panel and with four corners fixed connection's fixed block, the side wall of mounting panel is fixedly connected with the casing, the side wall of casing is installed with the gas collecting hood, and the opening end outer wall of gas collecting hood is fixedly connected with the exhaust fan through the bolt, the inside and the outer wall of casing are installed with filter mechanism and fixed mechanism respectively. Can start the exhaust fan, make the exhaust fan inhale the laboratory internal gas into the gas collecting hood, and the gas enters through the opening of left side of casing again, and filters in turn through first filter layer and second filter layer, so this can effectively treat the harmful substance in the gas, then discharges the gas of completing the filtration treatment through the filter screen plate, thereby has reduced the pollution to the environment and the threat to human health to the maximum extent.

Description

Technical Field

[0001] This utility model relates to the field of experimental safety protection technology, specifically a laboratory safety ventilation device. Background Technology

[0002] A laboratory is a place where experiments are conducted. Laboratories can be divided into three categories according to their affiliation: the first category is laboratories that belong to or are managed by universities; the second category is laboratories that belong to national institutions, and some are even international institutions; the third category is laboratories that belong directly to industrial enterprises and serve the development and research of industrial technologies. Some laboratories generate waste gas when conducting experiments, so it is necessary to exhaust these waste gases through ventilation devices.

[0003] For example, a laboratory purification ventilation device with application number CN202222411626.4 includes an exhaust duct. After the motor works, it drives the screw to rotate, so that the traction block can close the semi-circular blocking plate on the outside of the ring-shaped fixing plate through the traction of the traction rod and the movable seat. The ring-shaped fixing plate is kept sealed by contact with the rubber sealing ring, so as to prevent residual harmful gases far from the position of the exhaust duct away from the mounting plate and the ring-shaped fixing plate from flowing back into the laboratory after the fan stops working. This laboratory ventilation system uses a series of components, such as rubber sealing rings and ring-shaped fixing plates, inside the exhaust duct to open and close the pipes for ventilation. However, because there is no filtration and cleaning structure inside the exhaust duct, some harmful substances contained in the laboratory exhaust gas are directly discharged into the external environment, which not only easily pollutes the surrounding environment but may also threaten human health. Furthermore, with continuous use of the device, dust, particles, and other impurities carried in the exhaust gas will gradually adhere to and deposit on various structures inside the exhaust duct, seriously affecting the ventilation effect. Therefore, its actual performance is not good. Utility Model Content

[0004] The purpose of this invention is to provide a laboratory safety ventilation device to solve the problems mentioned in the background art, where the lack of a filtration and cleaning structure in the exhaust duct allows harmful substances in laboratory exhaust gas to be directly discharged into the external environment, which not only easily pollutes the surrounding environment but may also threaten human health. Furthermore, with continuous use of the device, dust, particles, and other impurities carried in the exhaust gas will gradually adhere to and deposit on various structures inside the exhaust duct, seriously affecting the ventilation effect.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a laboratory safety ventilation device, comprising a mounting plate and fixing blocks fixedly connected to its four corners, a housing fixedly connected to the side wall of the mounting plate, an air collecting hood installed on the side wall of the housing, and an exhaust fan fixedly connected to the outer wall of the opening end of the air collecting hood by bolts, and a filter mechanism and a fixing mechanism respectively installed inside and outside the housing; The filtration mechanism includes a first filter layer and a second filter layer inserted into the housing slot and the opening, with the first filter layer and the second filter layer in contact. A filter screen plate is fixedly connected to the middle of the mounting plate. A pair of sliding plates are slidably connected to the through slot of the housing. A cleaning brush plate is fixedly connected to the side wall of the sliding plate, with the bristles of the cleaning brush plate in contact with the holes of the filter screen plate. A moving component and a driving component are installed on the sliding plate.

[0006] Preferably, the moving component includes two pairs of first horizontal plates fixedly connected to the outer walls of the front and rear ends of the housing, and a bidirectional threaded rod is rotatably connected between the pair of first horizontal plates on the same side, and the outer wall of the bidirectional threaded rod is connected to the internal thread of the slide plate.

[0007] Preferably, the drive assembly includes a support plate fixedly connected to the front of the bottom end of the housing. A motor is fixedly connected inside the support plate. The output shaft of the motor is connected to a bidirectional threaded rod at the front end via a coupling. A synchronous pulley is fixedly connected to the outer wall of the bottom end of a pair of bidirectional threaded rods. The front and rear synchronous pulleys are rotatably connected by a synchronous belt, and the outer wall of the synchronous belt is clearance-fitted with the groove of the support plate.

[0008] Preferably, the fixing mechanism includes a pair of second horizontal plates and two pairs of arc-shaped blocks fixed to the side wall of the housing. The second horizontal plates are internally threaded with one-way threaded rods. Adjacent arc-shaped blocks are hinged with L-shaped baffles by pins. One end of the outer wall of the L-shaped baffle is in contact with the one-way threaded rod, and the other end of the outer wall of the L-shaped baffle is adapted to the slot of the gas collection hood.

[0009] Preferably, a handle is fixed to the end of the one-way threaded rod away from the L-shaped baffle.

[0010] Preferably, a cover plate is bolted to the outer wall of the opening of the housing.

[0011] This utility model has at least the following beneficial effects: The exhaust fan can be turned on to draw the gas inside the laboratory into the gas collection hood. The gas then enters through the opening on the left side of the shell and is filtered through the first and second filter layers in sequence. This effectively treats harmful substances in the gas. After that, the filtered gas is discharged through the filter screen, thereby minimizing environmental pollution and threats to human health. After the device has been used for a period of time, the motor can be started, which, together with the synchronous pulley and synchronous belt, drives a pair of double-threaded rods to rotate synchronously. The double-threaded rods, in turn, work with the through grooves in the housing to drive the sliding plate in a regular reciprocating motion, which in turn moves the cleaning brush plate. In this way, the brush bristles of the cleaning brush plate can clean the dust accumulated in the holes of the filter screen. When the exhaust fan is blowing air, the flowing air can blow out the cleaned dust. At the same time, the air collection hood and cover can be disassembled periodically to clean the dust trapped in the first filter layer inside the air collection hood. The first and second filter layers can be replaced periodically, thus ensuring the ventilation effect and thus improving the actual performance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model Figure 1 Sectional view in; Figure 3 This utility model Figure 1 The planar sectional view in the middle; Figure 4 This is a partial three-dimensional structural schematic diagram of the present invention. Figure 5 This utility model Figure 3 A schematic diagram of a local structure in the image; Figure 6 This utility model Figure 4 A schematic diagram of a local structure in the image; Figure 7 This utility model Figure 3 A schematic diagram of a local structure.

[0013] In the diagram: 1. Mounting plate; 2. Fixing block; 3. Housing; 4. Air collection hood; 5. Exhaust fan; 6. Filter screen; 7. First filter layer; 8. Second filter layer; 9. Slide plate; 10. Cleaning brush plate; 11. First horizontal plate; 12. Two-way threaded rod; 13. Support plate; 14. Motor; 15. Synchronous pulley; 16. Synchronous belt; 17. Second horizontal plate; 18. Arc-shaped block; 19. One-way threaded rod; 20. L-shaped baffle; 21. Handle; 22. Cover plate. Detailed Implementation

[0014] Please see Figures 1-7 A laboratory safety ventilation device includes a mounting plate 1 and fixing blocks 2 fixed to its four corners. A housing 3 is fixed to the side wall of the mounting plate 1. A gas collection hood 4 is installed on the side wall of the housing 3, and an exhaust fan 5 is fixed to the outer wall of the opening end of the gas collection hood 4 by bolts. A filter mechanism and a fixing mechanism are respectively installed inside and outside the housing 3. The filtration mechanism includes a first filter layer 7 and a second filter layer 8 inserted into the slot and opening of the housing 3, with the first filter layer 7 and the second filter layer 8 in contact. A filter screen plate 6 is fixedly connected to the middle of the mounting plate 1. A pair of sliding plates 9 are slidably connected to the through groove of the housing 3. A cleaning brush plate 10 is fixedly connected to the side wall of the sliding plate 9, with the bristles of the cleaning brush plate 10 in contact with the holes of the filter screen plate 6. A moving component and a driving component are installed on the sliding plate 9.

[0015] Openings can be machined on the lower left side of the housing 3, and slots can be machined on the inner wall of its top, so that the first filter layer 7 and the second filter layer 8 can be inserted. Gas can enter the interior through the left opening. Through grooves are machined on the front and rear ends of the housing 3, so that the slide plate 9 can be limited, so that the slide plate 9 can drive the cleaning brush plate 10 to move stably. The first filter layer 7 is made of waterproof activated carbon material, and the second filter layer 8 is made of biological active filler material, so as to better filter laboratory gases. Specifically, the exhaust fan 5 is activated to draw the gas inside the laboratory into the gas collection hood 4. The gas then enters through the opening on the left side of the housing 3 and is filtered sequentially through the first filter layer 7 and the second filter layer 8. This effectively treats harmful substances in the gas. After that, the filtered gas is discharged through the filter screen 6, thereby minimizing environmental pollution and threats to human health.

[0016] The moving component includes two pairs of first horizontal plates 11 fixedly connected to the outer walls of the front and rear ends of the housing 3. A bidirectional threaded rod 12 is rotatably connected between the pair of first horizontal plates 11 on the same side, and the outer wall of the bidirectional threaded rod 12 is connected to the internal thread of the slide plate 9. Specifically, when the bidirectional threaded rod 12 rotates, the cleaning brush plate 10 can be driven to move by the bidirectional threaded rod 12 in conjunction with the sliding plate 9.

[0017] The drive assembly includes a support plate 13 fixedly connected to the front of the bottom end of the housing 3. A motor 14 is fixedly connected inside the support plate 13. The output shaft of the motor 14 is connected to the front end of the bidirectional threaded rod 12 through a coupling. A pair of bidirectional threaded rods 12 are fixedly connected to the outer wall of their bottom ends. The front and rear synchronous pulleys 15 are rotatably connected by a synchronous belt 16, and the outer wall of the synchronous belt 16 is clearance-fitted with the groove of the support plate 13. Specifically, a groove is machined at the top of the support plate 12 to avoid the timing belt 16. A timing pulley 15 is installed on the bottom outer wall of the bidirectional threaded rod 12, and the two timing pulleys 15 are connected by the timing belt 16. This allows the pair of bidirectional threaded rods 12 to rotate synchronously. The front bidirectional threaded rod 12 is driven by a motor 14, which is connected to an external power controller for control. The thread grooves of the bidirectional threaded rod 12 are cleaned regularly to avoid jamming. The timing pulleys 15 and timing belt 16 are inspected regularly to ensure synchronous transmission.

[0018] The fixing mechanism includes a pair of second horizontal plates 17 and two pairs of arc-shaped blocks 18 fixed to the side wall of the housing 3. The inner thread of the second horizontal plate 17 is connected to a one-way threaded rod 19. An L-shaped baffle 20 is hinged between adjacent arc-shaped blocks 18 by a pin. The outer wall of one end of the L-shaped baffle 20 fits against the one-way threaded rod 19, and the outer wall of the other end of the L-shaped baffle 20 is adapted to the slot of the gas collection hood 4. Specifically, slots are machined on the upper and lower outer walls of the gas collection hood 4, so that the L-shaped baffle 20 can be inserted into the slots to block the gas collection hood 4.

[0019] A handle 21 is fixedly connected to the end of the one-way threaded rod 19 away from the L-shaped baffle 20.

[0020] The outer wall of the opening of the housing 3 is connected to a cover plate 22 by bolts and threads; Specifically, several small-diameter through holes are machined inside the cover plate 22.

[0021] It is worth noting that the electrical structure involved in this application can be selected according to the user's needs, and the corresponding circuit connection and control are all existing technologies that can be fully implemented by those skilled in the art, so they will not be described in detail here.

[0022] The working principle of this application is illustrated below with a preferred embodiment: When this device is needed, the first filter layer 7 and the second filter layer 8 can be inserted into the slots inside the housing 3 through the opening at the bottom of the housing 3. Then, the cover plate 22 is fixed to the opening at the bottom of the housing 3 with bolts to support and block the first filter layer 7 and the second filter layer 8. After that, the gas collection hood 4 is installed at the opening on the left side of the housing 3. Then, the L-shaped baffle 20 is rotated so that the end of the L-shaped baffle 20 near the gas collection hood 4 is inserted into its slot. Then, the handle 21 is rotated so that the one-way threaded rod 19 is rotated through the handle 21. The one-way threaded rod 19 can move towards the L-shaped baffle 20 through the second horizontal plate 17 until the L-shaped baffle 20 is pressed against it. In this way, the gas collection hood 4 can be fixed to the left side of the housing 3 through the one-way threaded rod 19 and the L-shaped baffle 20. Then, the device is moved to the exhaust opening position on the laboratory wall and fixed to the wall with the bolts on the fixing block 2. Turn on the exhaust fan 5 to draw the gas inside the laboratory into the gas collection hood 4. The gas then enters through the opening on the left side of the shell 3 and passes through the first filter layer 7 and the second filter layer 8 in sequence for filtration. This can effectively treat harmful substances in the gas. After that, the filtered gas is discharged through the filter screen 6, thereby minimizing environmental pollution and threats to human health. After the device has been used for a period of time, the motor 14 can be started, so that the motor 14, together with the synchronous pulley 15 and the synchronous belt 16, drives a pair of bidirectional threaded rods 12 to rotate synchronously. The bidirectional threaded rods 12, together with the through groove of the housing 3, drive the slide plate 9 to move back and forth in a regular manner, so that the slide plate 9 drives the cleaning brush plate 10 to move. In this way, the dust accumulated in the holes of the filter screen plate 6 can be cleaned by the brush bristles of the cleaning brush plate 10. When the exhaust fan 5 draws air, the flowing air can blow out the cleaned dust. At the same time, the air collection hood 4 and the cover plate 22 can be disassembled periodically to clean the dust intercepted by the first filter layer 7 in the air collection hood 4. The first filter layer 7 and the second filter layer 8 can be replaced periodically, thus ensuring the ventilation effect and thus improving the actual performance.

Claims

1. A laboratory safety ventilation device, comprising a mounting plate (1) and fixing blocks (2) fixedly connected to its four corners, characterized in that: The mounting plate (1) has a housing (3) fixed to its side wall. The housing (3) has a gas collection hood (4) installed on its side wall. The outer wall of the opening end of the gas collection hood (4) is fixed with an exhaust fan (5) by bolts. The housing (3) has a filter mechanism and a fixing mechanism installed inside and outside its side wall, respectively. The filtration mechanism includes a first filter layer (7) and a second filter layer (8) inserted into the slot and opening of the housing (3), and the first filter layer (7) and the second filter layer (8) are in contact with each other. A filter screen plate (6) is fixedly connected in the middle of the mounting plate (1). A pair of sliding plates (9) are slidably connected to the through groove of the housing (3). A cleaning brush plate (10) is fixedly connected to the side wall of the sliding plate (9), and the bristles of the cleaning brush plate (10) are in contact with the holes of the filter screen plate (6). A moving component and a driving component are installed on the sliding plate (9).

2. The laboratory safety ventilation device according to claim 1, characterized in that: The moving component includes two pairs of first horizontal plates (11) fixed to the outer walls of the front and rear ends of the housing (3). A bidirectional threaded rod (12) is rotatably connected between the pair of first horizontal plates (11) on the same side, and the outer wall of the bidirectional threaded rod (12) is connected to the internal thread of the slide plate (9).

3. A laboratory safety ventilation device according to claim 1, characterized in that: The drive assembly includes a support plate (13) fixedly connected to the front of the bottom end of the housing (3). A motor (14) is fixedly connected inside the support plate (13). The output shaft of the motor (14) is connected to the front end of the bidirectional threaded rod (12) through a coupling. A pair of bidirectional threaded rods (12) are fixedly connected to the outer wall of the bottom end of the bottom end of the pair of bidirectional threaded rods (12). The front and rear synchronous pulleys (15) are rotatably connected by a synchronous belt (16), and the outer wall of the synchronous belt (16) is clearance-fitted with the groove of the support plate (13).

4. A laboratory safety ventilation device according to claim 1, characterized in that: The fixing mechanism includes a pair of second horizontal plates (17) and two pairs of arc blocks (18) fixed to the side wall of the housing (3). The second horizontal plate (17) is internally threaded with a one-way threaded rod (19). An L-shaped baffle (20) is hinged between adjacent arc blocks (18) by a pin. One end of the outer wall of the L-shaped baffle (20) is in contact with the one-way threaded rod (19), and the other end of the outer wall of the L-shaped baffle (20) is adapted to the slot of the gas collection hood (4).

5. A laboratory safety ventilation device according to claim 4, characterized in that: The one-way threaded rod (19) has a handle (21) fixed to the end away from the L-shaped baffle (20).

6. A laboratory safety ventilation device according to claim 1, characterized in that: The outer wall of the opening of the housing (3) is connected to a cover plate (22) by bolt thread.

Images