Laboratory ventilation and purification device

Abstract

The invention relates to the technical field of ventilation and purification devices, and particularly discloses a laboratory ventilation and purification device which comprises a box body, multiple groups of filtering mechanisms and a material changing mechanism, the multiple groups of filtering mechanisms are arranged in the box body in the horizontal direction and the vertical direction, and each group of filtering mechanism comprises a first filtering plate and a second filtering plate; the first filter plate and the second filter plate are both of a V-shaped structure, containing cavities are formed in the first filter plate and the second filter plate, the material changing mechanism comprises a material supply part and a material changing assembly, the discharging end of the material supply part is communicated with the containing cavities in the first filter plate, the material changing assembly comprises a material conveying part and two sets of discharging parts, and the two sets of discharging parts are arranged in the first filter plate and the second filter plate correspondingly. The material conveying piece is arranged between the filter plate I and the filter plate II; the device is provided with the two independent activated carbon filter layers, the purification effect is ensured, activated carbon can be replaced in the operation process of the device, shutdown disassembly is not needed, and the problems that in an existing device, activated carbon is inconvenient to replace, and the efficiency is affected are solved.

Description

Technical Field

[0001] The invention relates to the technical field of ventilation and purification devices, and in particular to a laboratory ventilation and purification device. Background Art

[0002] Laboratory ventilation is an indispensable part of laboratory design. In order to prevent laboratory personnel from inhaling or swallowing some toxic, pathogenic or unknown toxic chemicals, the laboratory should have good ventilation. Therefore, the laboratory needs to use a ventilation system to exhaust toxic gases in the room during use to ensure the safety of researchers. When the air in the laboratory is discharged, most of the air is purified by activated carbon to remove pollutants in the air, ensure that the air in the laboratory meets the requirements, and at the same time make the discharged air meet environmental protection standards.

[0003] The patent document with announcement number CN221526789U discloses a ventilation and purification device for a clean laboratory, including a frame and a cleaning device. Two activated carbon filter plates are symmetrically installed on one side of the frame. The cleaning device includes a motor. A threaded rod is connected to the output end of the motor. A slider is connected to the threaded rod. A cleaning wiper is connected to one side of the slider. When in use, the threaded rod is driven to rotate by the motor in the cleaning device. The rotation of the threaded rod drives the slider to reciprocate. The slider drives the cleaning wiper to reciprocate and cleans the side of the activated carbon filter plate that filters the air, thereby ensuring the air purification effect.

[0004] When using a ventilation purification device to purify the air, if the activated carbon filter plate is an integral design, that is, the activated carbon is tightly combined with the filter plate, then when the activated carbon fails, the entire filter plate needs to be replaced, which is costly and easily generates more waste. Therefore, most of the activated carbon filter plates in the related art are detachable designs, that is, the activated carbon can be removed and replaced separately. However, this design still has some problems. That is, after the activated carbon fails, the device needs to be shut down, and then the relevant personnel disassemble the device and take out and replace the activated carbon inside. The operation is inconvenient, reduces work efficiency, and is prone to secondary pollution, affecting the normal operation of the laboratory. Summary of the invention

[0005] The present invention provides a laboratory ventilation and purification device, aiming to solve the problem that when the activated carbon filter plate in the ventilation and purification device in the related art is designed to be detachable, the device needs to be shut down for later replacement, and the activated carbon in the device needs to be manually disassembled and replaced, which is inconvenient to operate, reduces work efficiency, and is likely to cause secondary pollution, thereby affecting the normal operation of the laboratory.

[0006] A laboratory ventilation and purification device of the present invention comprises a box body, on which an air inlet and an air outlet are arranged, and further comprises a filtering mechanism and a material changing mechanism; The filter mechanism is provided in multiple groups, and the multiple groups of filter mechanisms are arranged in the box body in the horizontal direction and the vertical direction. Each group of filter mechanisms includes filter plate 1 and filter plate 2. The filter plate 1 and the filter plate 2 are both V-shaped structures, and the filter plate 2 is nested and installed inside the opening of the filter plate 1. The filter plate 1 and the filter plate 2 are both provided with a material cavity for accommodating activated carbon. After the gas enters the box body from the air inlet, it will be filtered by the filter plate 2 and the filter plate 1 in turn, and then discharged from the air outlet; The material changing mechanism includes a feeding piece and a material changing assembly. The discharge end of the feeding piece is communicated with the material containing cavity in the filter plate one, and is used for conveying new activated carbon into the filter plate one. The material changing assembly includes a feeding piece and two groups of unloading pieces. The two groups of unloading pieces are respectively arranged in the filter plate one and the filter plate two, and are used for discharging the activated carbon in the corresponding material containing cavity to the outside. The feeding piece is arranged between the filter plate one and the filter plate two, and is used for conveying the activated carbon discharged from the filter plate one to the filter plate two.

[0007] When in use, the gas to be filtered enters the interior of the box from the air inlet, and then is filtered twice through the activated carbon in filter plate two and filter plate one, and finally is discharged outward from the air outlet to improve the purification effect; and the use of a double-layer independent activated carbon filter layer can ensure that at least one layer is always in working condition, thereby ensuring the continuity and stability of the filtering effect; when the activated carbon in filter plate two is about to fail, the activated carbon in filter plate one and filter plate two is discharged outward through the unloading piece, and the activated carbon discharged from filter plate one is transported to filter plate one through the feeding piece, so that it continues to perform preliminary filtration on the air in the box, and at the same time, new activated carbon is added to filter plate one through the feeding piece to ensure the secondary filtration effect; the material replacement operation is adopted, so that the replacement of activated carbon can be carried out during the operation of the device without stopping for disassembly, which solves the problem of inconvenient replacement of activated carbon and affecting efficiency in existing devices.

[0008] Preferably, the feeding parts are provided in multiple groups and are respectively arranged corresponding to the multiple columns of filtering mechanisms, each group of feeding parts includes a hopper, a feeding pipe and multiple branch pipes, the hopper is connected to the feeding pipe, the multiple branch pipes are connected to the feeding pipe, and respectively correspond to the multiple filter plates one located in the same column, the filter plate one has two material containing cavities, the two material containing cavities are respectively located in the two branches of the filter plate one, a feeding cavity is provided at the tip of the filter plate one, the feeding cavity is connected to the corresponding branch pipe, an inclined surface one is provided between the feed cavity and the two material containing cavities, and each inclined surface one is inclined from top to bottom toward the direction close to the material containing cavity.

[0009] Preferably, the unloading parts are provided in multiple groups and are correspondingly arranged in multiple material holding chambers, each group of unloading parts includes a rotating shaft and multiple baffle plates, the lower ends of filter plate 1 and filter plate 2 are provided with a discharge chamber communicated with the material holding chamber, the rotating shaft is horizontally rotated and arranged between the material holding chamber and the discharge chamber, and multiple baffle plates are installed on the rotating shaft at intervals along the circumference of the rotating shaft, the baffle plates can block the activated carbon in the material holding chamber, and when the rotating shaft rotates, the activated carbon in the material holding chamber is moved to the discharge chamber below.

[0010] Preferably, each material blocking plate is an elastic telescopic structure.

[0011] Preferably, the feeding member includes a feeding barrel, an auger shaft and an auger blade. The feeding barrel is longitudinally installed at the tip of the filter plate. The lower end of the feeding barrel is communicated with the discharge cavity provided at the lower end of the filter plate. The upper end of the feeding barrel is communicated with the two material containing cavities provided in the filter plate. The auger shaft is longitudinally rotatably installed in the feeding barrel. The auger blade is installed on the auger shaft. When the auger shaft rotates, the activated carbon in the feeding barrel can be transported from bottom to top.

[0012] Preferably, a discharge cavity at a lower end of the filter plate is provided with a slope 2, which is inclined from top to bottom toward the direction close to the lower end of the feed cylinder, and a discharge port is provided at the upper end of the feed cylinder. Two feed cavities are provided at the upper end of the filter plate 2, and the two material containing cavities in the filter plate 2 are respectively connected to the discharge port through the corresponding material containing cavities, and each feed cavity is provided with a slope 3, which is inclined from top to bottom toward the direction close to the material containing cavity.

[0013] Preferably, an ultraviolet lamp is installed in the feeding tube.

[0014] The effect is that the activated carbon can be irradiated during transportation, which can restore the adsorption capacity of the activated carbon to a certain extent and increase its service life.

[0015] Preferably, a cloth piece is provided at the upper end of each material containing cavity, and the cloth piece includes auger shaft 2 and auger blade 2. The auger shaft 2 is horizontally rotatably arranged in the material containing cavity, and the auger blade 2 is installed on the auger shaft 2.

[0016] The effect is that when the auger shaft 2 rotates, the spiral structure of the auger blade 2 can be used to push the activated carbon entering the material chamber to be evenly distributed in the material chamber, thereby reducing the poor local filtering effect caused by uneven distribution of activated carbon.

[0017] Preferably, each rotating shaft and auger shaft are provided with a driving structure, the driving structure comprising a driving rod, a rack and a gear, the driving rod slides radially along the feed barrel and penetrates the side wall of the feed barrel, and an elastic member for driving the driving rod to reset is provided between the driving rod and the filter plate 2, and an inclined surface 4 is provided at the end of the driving rod facing the feed barrel, and the inclined surface 4 is inclined from top to bottom in a direction away from the axis of the feed barrel. When the auger shaft 1 rotates, the outer peripheral side of the auger blade 1 can contact the inclined surface 4 provided on the driving rod, and the rack is provided at the end of the driving rod away from the feed barrel, the gear is connected to the end of the rotating shaft or the auger shaft 2, and the rack is meshed with the gear for transmission.

[0018] The effect is that it can utilize the rotation of the existing auger shaft one and, through the design of inclined plane four, convert the rotational motion of the auger shaft one into the reciprocating motion of the drive rod, and through the design of gears and racks, convert it into the rotational motion of the rotating shaft and the auger shaft two, thereby realizing the operation of the unloading parts and the fabric parts, without the need for an additional drive source, simplifying the device structure and reducing costs.

[0019] Preferably, a material collection piece is also provided in the box body, and the material collection piece includes a material collection box and a material collection pipe. There are multiple material collection boxes, and they are respectively arranged corresponding to the multiple rows of filtering mechanisms. Two adjacent material collection boxes are connected through multiple material collection pipes. The material collection box located at the bottom layer is provided with a material taking port for taking materials. The discharge cavity provided at the lower end of the second filter plate is communicated with the corresponding material collection box, and a slope five is provided in the discharge cavity, and the slope five is inclined from top to bottom toward the direction close to the material collection box.

[0020] The effect is that the activated carbon discharged from the second filter plate can be automatically collected without stopping or disassembling the equipment, thereby improving work efficiency. In addition, during the entire aggregation process, manual operations are reduced, effectively reducing the risk of operators being exposed to harmful substances.

[0021] The beneficial effects of the present invention are: 1. The present invention is provided with a filtering mechanism. The air entering the box body will first be filtered by the activated carbon in the second filter plate, and then filtered again by the activated carbon in the first filter plate, which can more effectively remove pollutants in the air and improve the purification effect. The double-layer independent activated carbon filter layer design can ensure that at least one layer is always in working condition. Even if the outer layer of activated carbon fails due to adsorption saturation, the inner layer of activated carbon can continue to play a role, thereby ensuring the continuity and stability of the filtering effect.

[0022] 2. The present invention is provided with a material changing mechanism. When the activated carbon in the filter plate 2 is about to become ineffective, the activated carbon in the filter plates 1 and 2 is discharged through the unloading member, and the activated carbon discharged from the filter plate 1 is transported to the filter plate 2 through the feeding member. At the same time, new activated carbon is added to the filter plate 1 through the feeding member, so that the replacement of the activated carbon can be carried out during the operation of the device without stopping the device for disassembly, thereby solving the problem of inconvenient replacement of activated carbon and affecting work efficiency in traditional devices. In addition, during the material changing process, it can avoid the pollution of the environment due to leakage of activated carbon or the influence of the filtering effect due to lack of activated carbon, thereby ensuring the purification effect.

[0023] 3. The present invention is provided with a collecting piece, which can automatically collect the activated carbon discharged from the second filter plate without stopping or disassembling the equipment, reducing manual operation, improving work efficiency, and reducing the risk of operators being exposed to harmful substances. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the assembly structure of multiple groups of filtering mechanisms of the present invention.

[0026] Figure 3 It is a structural schematic diagram of the filtering mechanism of the present invention.

[0027] Figure 4 It is a schematic structural diagram of the filtering mechanism of the present invention cut along the transverse direction.

[0028] Figure 5 It is a schematic diagram of the assembly structure of the feeding member and the filter plate 1 of the present invention.

[0029] Figure 6 It is a structural schematic diagram of the blanking piece and the cloth piece of the present invention.

[0030] Figure 7 It is a structural schematic diagram of the blanking part of the present invention.

[0031] Figure 8 It is a structural schematic diagram of the material feeding member of the present invention.

[0032] Fig. 9 It is a structural schematic diagram of the driving structure of the present invention.

[0033] Fig.10 The present invention Fig. 9 Schematic diagram of the enlarged structure at point A in the middle.

[0034] Reference numerals: 1. Box body; 11. Air inlet; 12. Air outlet; 2. Filter mechanism; 201. Material holding chamber; 202. Material discharging chamber; 21. Filter plate 1; 211. Material feeding chamber; 22. Filter plate 2; 221. Material conveying chamber; 3. Material supply member; 31. Material hopper; 32. Material feeding pipe; 33. Branch pipe; 4. Material discharge member; 41. Rotating shaft; 42. Material baffle plate; 5. Material conveying member; 51. Material conveying barrel; 511. Material discharging port; 52. Auger shaft 1; 53. Auger blade 1; 6. Material distribution member; 61. Auger shaft 2; 62. Auger blade 2; 7. Driving structure; 71. Driving rod; 72. Rack; 73. Gear; 74. Elastic member; 8. Material collecting member; 81. Material collecting box; 82. Material collecting pipe. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0036] like Figures 1 to 10As shown, a laboratory ventilation and purification device of the present invention includes a box body 1, a filtering mechanism 2, a material changing mechanism, a cloth member 6 and a collecting member 8.

[0037] The box 1 is provided with an air inlet 11 and an air outlet 12, and the filter mechanism 2 is arranged in the box 1. After the gas passes into the box 1 from the air inlet 11, it will be purified by the filter mechanism 2 to remove pollutants in the air, and then discharged from the air outlet 12 to provide clean air for the laboratory, ensure that the air quality in the laboratory meets the safety and health standards, protect the health of the experimenters, and ensure that the gas discharged from the laboratory meets the environmental protection standards to reduce pollution to the environment. In the prior art, the filter mechanism 2 mostly uses activated carbon to adsorb some substances in the air, and the material replacement mechanism is used to replace the activated carbon after the activated carbon fails.

[0038] Among them, a primary filtering device is provided at the air inlet 11 for preliminary filtering of the air entering the box 1. The primary filtering device can adopt a primary filter to intercept large particle pollutants in the air, effectively reducing the burden of the subsequent filtering mechanism 2, extending its service life, and improving purification efficiency.

[0039] like Figures 2 to 5 As shown, the filter mechanism 2 is arranged in multiple groups, and the multiple groups of filter mechanisms 2 are arranged in the box body 1 along the horizontal direction and the vertical direction to form a grid layout. Each group of filter mechanisms 2 includes a filter plate 1 21 and a filter plate 2 22, and the filter plate 1 21 and the filter plate 2 22 are both V-shaped structures, and the filter plate 2 22 is nested and installed inside the opening of the filter plate 1 21, so that the V-shaped structure of the filter plate 2 22 is completely located in the V-shaped opening of the filter plate 1 21. The two branches of the filter plate 1 21 are provided with a material cavity 201 for accommodating activated carbon, and the two branches of the filter plate 2 22 are provided with a material cavity 201 for accommodating activated carbon. The design of the V-shaped structure can effectively increase the filtration area and improve the filtration efficiency. In addition, a primary filter can be set at the open end of the filter plate 2 22 to intercept pollutants in the air again and improve the filtration effect.

[0040] The working process of the filter mechanism 2 of the present invention is as follows: after the gas enters the interior of the box 1 from the air inlet 11, it will first flow to the opening of the second filter plate 22, and then be filtered by the activated carbon in the second filter plate 22, and then be filtered again by the activated carbon in the first filter plate 21, and finally be discharged from the air outlet 12. When in use, the activated carbon in the second filter plate 22 first contacts the pollutants in the incoming air. At this time, the activated carbon in the second filter plate 22 will preferentially adsorb most of the pollutants, reducing the adsorption burden of the activated carbon in the first filter plate 21. As the use time increases, the adsorption capacity of the activated carbon in the second filter plate 22 will be saturated faster, while the activated carbon in the first filter plate 21 will be relatively less in contact with pollutants, so its adsorption capacity decreases more slowly. By setting two independent activated carbon filter layers, it can be ensured that at least one layer is always in working condition. Even if the outer layer of activated carbon fails due to adsorption saturation, the inner layer of activated carbon can continue to play a role, thereby ensuring the continuity and stability of the filtering effect. In addition, the design of the double-layer activated carbon filter layer can more effectively remove pollutants in the air and improve the purification effect.

[0041] like Figures 2 to 6 As shown, the material changing mechanism includes a feeding member 3 and a material changing assembly. The feeding end of the feeding member 3 is connected to an external feeding device, and the discharging end of the feeding member 3 is communicated with the material containing cavity 201 provided in the filter plate 1 21, and is used to convey new activated carbon into the filter plate 1 21. The material changing assembly includes a feeding member 5 and two groups of unloading members 4. The two groups of unloading members 4 are respectively provided in the filter plate 1 21 and the filter plate 2 22, and are used to discharge the activated carbon in the corresponding material containing cavity 201 to the outside. The feeding member 5 is provided between the filter plate 1 21 and the filter plate 2 22, and is used to convey the activated carbon discharged from the filter plate 1 21 to the filter plate 2 22.

[0042] like Figures 2 to 6 As shown, the feed members 3 are provided in multiple groups, and are respectively arranged corresponding to the multiple columns of the filter mechanisms 2. Each group of feed members 3 includes a hopper 31, a feed pipe 32 and multiple branch pipes 33. The hopper 31 can receive the activated carbon provided by the external feeding equipment. The lower end of the hopper 31 is connected to the feed pipe 32. The multiple branch pipes 33 are all connected to the feed pipe 32, and the multiple branch pipes 33 correspond to the multiple filter plates 1 21 located in the same column. A feed cavity 211 is provided at the tip of the filter plate 1 21. The feed cavity 211 is connected to the corresponding branch pipe 33. A feed channel is provided between the feed cavity 211 and the two material containing cavities 201, and a slope 1 is provided in each feed channel. The slope 1 is inclined from top to bottom toward the direction close to the corresponding material containing cavity 201. When in use, new activated carbon is transported to the hopper 31 through an external feeding device, then transported to multiple branch pipes 33 through a feeding pipe 32, and enters the corresponding feed chamber 211, and then slides along the inclined surface in the feed channel to the material chamber 201, thereby feeding the filter plate 21.

[0043] like Figure 6 and Figure 7 As shown, the unloading parts 4 are provided in multiple groups and are correspondingly arranged in multiple material holding chambers 201, each group of unloading parts 4 includes a rotating shaft 41 and multiple baffle plates 42, the lower ends of filter plates 1 21 and 22 are provided with discharge chambers 202 communicated with the material holding chamber 201, the rotating shaft 41 is horizontally rotated and arranged between the material holding chamber 201 and the discharge chamber 202, and multiple baffle plates 42 are installed on the rotating shaft 41 at intervals along the circumference of the rotating shaft 41, the baffle plates 42 can block the activated carbon in the material holding chamber 201, and when the rotating shaft 41 rotates, the activated carbon in the material holding chamber 201 is moved to the discharge chamber 202 below, and the activated carbon is prevented from being discharged all at once, thereby ensuring the orderly replacement of the activated carbon.

[0044] Among them, the number of baffle plates 42 in each group of unloading parts 4 is preferably four, and each baffle plate 42 is an elastic telescopic structure, which can effectively block and move the activated carbon, and avoid stagnation and blockage caused by the rigid structure, thereby ensuring the continuity and stability of unloading.

[0045] like Figures 4 to 9 As shown, the feeding member 5 includes a feeding barrel 51, an auger shaft 1 52 and an auger blade 1 53. The feeding barrel 51 is longitudinally mounted at the tip of the filter plate 22. The lower end of the feeding barrel 51 is in communication with the discharge cavity 202 provided at the lower end of the filter plate 21, and can receive the activated carbon discharged from the inside of the filter plate 21. The upper end of the feeding barrel 51 is in communication with the two material containing cavities 201 provided in the filter plate 22, and can transport the activated carbon to the filter plate 22. The auger shaft 1 52 is longitudinally rotatably mounted in the feeding barrel 51, and the auger blade 1 53 is mounted on the auger shaft 1 52. When the auger shaft 1 52 rotates, the auger blade 1 53 can transport the activated carbon in the feeding barrel 51 from bottom to top. By conveying the activated carbon through the feeding member 5, the activated carbon discharged from the filter plate 1 21 can be automatically conveyed to the filter plate 2 22, which reduces the need for manual operation, improves the material replacement efficiency, and prevents the activated carbon from leaking or polluting the environment during the transportation process.

[0046] like Figures 4 to 8As shown, in order to ensure the smooth progress of the material replacement process, the discharge cavity 202 at the lower end of the filter plate 1 21 is provided with a second slope, which is inclined from top to bottom toward the lower end of the feeding barrel 51, so that the activated carbon can flow smoothly from the discharge cavity 202 at the lower end of the filter plate 1 21 to the lower end of the feeding barrel 51, thereby preventing the activated carbon from accumulating in the discharge cavity 202. The upper end of the feeding barrel 51 is provided with a discharge port 511, and the upper end of the filter plate 22 is provided with two feeding cavities 221. The two material containing cavities 201 provided in the filter plate 22 are respectively communicated with the discharge port 511 through the corresponding feeding cavities 221, thereby ensuring that the activated carbon in the feeding barrel 51 can respectively enter the two material containing cavities 201 of the filter plate 22. Each feed cavity 221 is provided with a slope three, which is inclined from top to bottom toward the direction close to the material receiving cavity 201, and can guide the activated carbon from the feed cavity 221 to flow smoothly into the corresponding material receiving cavity 201, thereby avoiding the accumulation of activated carbon in the feed cavity 221.

[0047] Among them, an ultraviolet lamp can be installed in the feeding barrel 51 to irradiate the activated carbon during the transportation process, so as to decompose the organic matter adsorbed on the surface of the activated carbon through photocatalysis, thereby restoring the adsorption capacity of the activated carbon to a certain extent and improving its service life. Specifically, the ultraviolet lamp can adopt a ring design and be evenly installed on the inner wall of the feeding barrel 51, which can ensure that the activated carbon is exposed to all-round ultraviolet rays during the transportation process, thereby improving the disinfection effect.

[0048] The working process of the material changing mechanism of the present invention is as follows: as the use time increases, when it is detected that the activated carbon in the filter plate 22 is about to fail, the material unloading member 4 at the lower end of the filter plate 21 is started, and the activated carbon in the filter plate 21 is moved to the discharge cavity 202 provided at the lower end of the filter plate 21 through the rotation of the rotating shaft 41 and the material baffle plate 42, so as to prepare for the subsequent material change. At the same time, the material unloading member 4 at the lower end of the filter plate 22 is started, and the activated carbon in the filter plate 22 is moved to the discharge cavity 202 provided at the lower end of the filter plate 22 through the rotation of the rotating shaft 41 and the material baffle plate 42, so as to be taken out or collected later.

[0049] During the process of unloading the activated carbon in the filter plate 21, the feeding part 3 is started, so that the new activated carbon in the hopper 31 is transported along the feeding pipe 32 to the multiple branch pipes 33, and enters into the feeding cavity 211 provided on the corresponding filter plate 21, and then slides along the inclined surface 1 in the feeding channel to the containing cavity 201 provided on the filter plate 21, so as to replenish the activated carbon in the filter plate 21.

[0050] During the unloading process of the activated carbon in the filter plate 22, the feeding piece 5 is started to rotate the auger shaft 52. At this time, the activated carbon discharged from the filter plate 21 will slide along the inclined surface 2 in the discharge cavity 202 to the feeding barrel 51, and after entering the inside of the feeding barrel 51, it will be transported upward by the spiral structure of the auger blade 53. When this part of the activated carbon is transported to the upper end of the feeding barrel 51, it will be discharged outward through the discharge port 511, and then enter the feeding cavity 221 set at the upper end of the filter plate 22, and slide along the inclined surface 3 in the feeding cavity 221 to the containing cavity 201 set on the filter plate 22, so as to replenish the activated carbon in the filter plate 22.

[0051] Through the above-mentioned material replacement operation, the replacement of activated carbon can be carried out during the operation of the device without stopping the device for disassembly, which solves the problem of inconvenient replacement of activated carbon and affecting work efficiency in traditional devices. In addition, during the replacement process, the activated carbon in filter plate 1 21 and filter plate 2 22 can always be in a full state, avoiding the situation where the filtration effect is affected by the lack of activated carbon during the material replacement process. In addition, since the activated carbon in filter plate 1 21 is less exposed to pollutants, its adsorption capacity is relatively strong. After transferring it to filter plate 2 22, it can continue to exert its high adsorption efficiency. After replacing the activated carbon in filter plate 1 21 with a new part, filter plate 1 21 can better process the air filtered by filter plate 2 22 again, thereby improving the purification effect.

[0052] like Figures 4 to 6 As shown, in order to solve the problem of uneven distribution of activated carbon in the material chamber 201, a cloth member 6 is provided at the upper end of each material chamber 201, and the cloth member 6 includes an auger shaft 2 61 and an auger blade 2 62. The auger shaft 2 61 is horizontally rotatable and arranged in the material chamber 201, and the auger blade 2 62 is installed on the auger shaft 2 61. When the auger shaft 2 61 rotates, the activated carbon can be pushed to be evenly distributed in the lateral range of the material chamber 201 through the spiral structure of the auger blade 2 62, so as to avoid the activated carbon from accumulating on one side of the material chamber 201 close to the feed chamber 211 or the feed chamber 221, thereby achieving uniform distribution of the activated carbon and reducing the situation of poor local filtering effect caused by uneven distribution of the activated carbon.

[0053] like Figure 2 and Figure 8 As shown, in order to realize the operation of the material feeding member 5, a driving source for driving the auger shaft 52 to rotate is installed on the filter plate 21. In order to simplify the device, the material feeding members 5 in the same column of the filter mechanism 2 can use the same auger shaft 52, that is, multiple material feeding members 5 in the same column only need one driving source to realize the driving, and at this time, the material feeding cylinder 51 in each filter plate 21 can still be independent of each other, ensuring the material replacement effect of the filter mechanism 2.

[0054] like Figures 6 to 10As shown, in order to realize the operation of the unloading member 4 and the fabric member 6, each rotating shaft 41 and the second auger shaft 61 are provided with a driving structure 7 for driving them to rotate. The driving structure 7 includes a driving rod 71, a rack 72 and a gear 73. The driving rod 71 is arranged in the second filter plate 22 and can slide along the radial direction of the feeding cylinder 51 to penetrate the side wall of the feeding cylinder 51. An elastic member 74 for driving the driving rod 71 to reset is provided between the driving rod 71 and the second filter plate 22. The elastic force direction of the elastic member 74 is the same as the sliding direction of the driving rod 71. The elastic member 74 can be a spring. The end of the driving rod 71 facing the feeding barrel 51 is provided with a bevel 4, which is inclined from top to bottom in a direction away from the axis of the feeding barrel 51. When the auger shaft 1 52 rotates, the outer peripheral side of the auger blade 1 53 can contact the bevel 4 provided on the driving rod 71, and push the driving rod 71 to move in a direction away from the axis of the feeding barrel 51, so as to convert the rotational motion of the auger shaft 1 52 into the reciprocating motion of the driving rod 71. The rack 72 is provided at the end of the driving rod 71 away from the feeding barrel 51, and the gear 73 is connected to the end of the rotating shaft 41 or the auger shaft 2 61, and the rack 72 and the gear 73 are meshed for transmission, which is used to convert the reciprocating motion of the driving rod 71 into the rotational motion of the rotating shaft 41 or the auger shaft 2 61, so as to realize the automatic driving of the unloading member 4 and the cloth member 6, and no additional power source is required, which simplifies the device structure and reduces the cost.

[0055] like Figure 2 and Figure 8 As shown, in order to process the activated carbon discharged from the filter plate 22, a collection piece 8 is also provided in the box body 1. The collection piece 8 includes a collection box 81 and a collection pipe 82. The collection boxes 81 are provided in multiple numbers and are respectively provided corresponding to the multi-row filter mechanism 2. The discharge cavity 202 provided at the lower end of the filter plate 22 is communicated with the corresponding collection box 81, and is used to collect the activated carbon discharged from the filter plate 22. Two adjacent collection boxes 81 are connected through multiple collection pipes 82. The collection box 81 at the bottom layer is provided with a material taking port so that the activated carbon can be collected in the collection box 81 at the bottom layer for taking out. The discharge cavity 202 provided at the lower end of the filter plate 22 is provided with an inclined surface 5, which is inclined from top to bottom in the direction close to the collection box 81, which helps the activated carbon to slide smoothly into the collection box 81 and reduce blockage. Through the design of the collecting member 8, the activated carbon in the filter plate 22 is automatically collected without stopping or disassembling the equipment, thereby improving efficiency, reducing manual operations throughout the process, and effectively reducing the risk of operators being exposed to harmful substances.

[0056] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A laboratory ventilation and purification device, comprising a housing (1), the housing (1) being provided with an air inlet (11) and an air outlet (12), characterized in that: It also includes a filtering mechanism (2) and a material changing mechanism; The filter mechanism (2) is arranged in a plurality of groups, and the plurality of groups of filter mechanisms (2) are arranged in the box body (1) along the horizontal direction and the vertical direction. Each group of filter mechanisms (2) comprises a filter plate 1 (21) and a filter plate 2 (22). The filter plate 1 (21) and the filter plate 2 (22) are both V-shaped structures, and the filter plate 2 (22) is nested and installed inside the opening of the filter plate 1 (21). The filter plate 1 (21) and the filter plate 2 (22) are both provided with a material holding cavity (201) for holding activated carbon. After the gas enters the box body (1) from the air inlet (11), it is filtered by the filter plate 2 (22) and the filter plate 1 (21) in turn, and then discharged from the air outlet (12); The material changing mechanism comprises a feeding member (3) and a material changing assembly. The discharge end of the feeding member (3) is in communication with a material containing cavity (201) in the first filter plate (21) and is used to convey new activated carbon into the first filter plate (21). The material changing assembly comprises a feeding member (5) and two groups of discharge members (4). The two groups of discharge members (4) are respectively arranged in the first filter plate (21) and the second filter plate (22) and are used to discharge the activated carbon in the corresponding material containing cavity (201) to the outside. The feeding member (5) is arranged between the first filter plate (21) and the second filter plate (22) and is used to convey the activated carbon discharged from the first filter plate (21) to the second filter plate (22).

2. A laboratory ventilation and purification device according to claim 1, characterized in that: The feeding members (3) are provided in a plurality of groups and are respectively arranged corresponding to the plurality of columns of the filtering mechanisms (2). Each group of the feeding members (3) comprises a hopper (31), a feeding pipe (32) and a plurality of branch pipes (33). The hopper (31) is connected to the feeding pipe (32). The plurality of branch pipes (33) are connected to the feeding pipe (32) and respectively correspond to a plurality of filter plates (21) located in the same column. The number of material containing cavities (201) in the filter plate (21) is provided in two groups. The two material containing cavities (201) are respectively located in two branches of the filter plate (21). A feeding cavity (211) is provided at the tip of the filter plate (21). The feeding cavity (211) is connected to the corresponding branch pipe (33). An inclined surface (1) is provided between the feeding cavity (211) and the two material containing cavities (201), and each inclined surface (1) is inclined from top to bottom in a direction close to the material containing cavity (201).

3. A laboratory ventilation and purification device according to claim 1, characterized in that: The material discharge members (4) are provided in a plurality of groups and are correspondingly arranged in a plurality of material containing chambers (201). Each group of material discharge members (4) comprises a rotating shaft (41) and a plurality of material blocking plates (42). The lower ends of the filter plates 1 (21) and 2 (22) are provided with a material discharge chamber (202) communicating with the material containing chamber (201). The rotating shaft (41) is arranged between the material containing chamber (201) and the material discharge chamber (202) for horizontal rotation. The plurality of material blocking plates (42) are installed on the rotating shaft (41) at intervals along the circumference of the rotating shaft (41). The material blocking plates (42) can block the activated carbon in the material containing chamber (201) and move the activated carbon in the material containing chamber (201) to the lower material discharge chamber (202) when the rotating shaft (41) rotates.

4. A laboratory ventilation and purification device according to claim 3, characterized in that: Each material blocking plate (42) is an elastic telescopic structure.

5. A laboratory ventilation and purification device according to claim 3, characterized in that: The material feeding member (5) comprises a feeding barrel (51), an auger shaft (52) and an auger blade (53). The feeding barrel (51) is longitudinally mounted at the tip of the second filter plate (22). The lower end of the feeding barrel (51) communicates with a discharge cavity (202) provided at the lower end of the first filter plate (21). The upper end of the feeding barrel (51) communicates with two material containing cavities (201) provided in the second filter plate (22). The auger shaft (52) is longitudinally rotatably mounted in the feeding barrel (51). The auger blade (53) is mounted on the auger shaft (52). When the auger shaft (52) rotates, the activated carbon in the feeding barrel (51) can be transported from bottom to top.

6. A laboratory ventilation and purification device according to claim 5, characterized in that: A second inclined surface is provided in the discharge cavity (202) at the lower end of the first filter plate (21), and the second inclined surface is inclined from top to bottom in a direction close to the lower end of the feed cylinder (51). A discharge port (511) is provided at the upper end of the feed cylinder (51). Two feed cavities (221) are provided at the upper end of the second filter plate (22). The two material containing cavities (201) provided in the second filter plate (22) are communicated with the discharge port (511) through corresponding material containing cavities (221), and each material containing cavity (221) is provided with a third inclined surface, and the third inclined surface is inclined from top to bottom in a direction close to the material containing cavity (201).

7. A laboratory ventilation and purification device according to claim 5, characterized in that: An ultraviolet lamp is installed in the feeding tube (51).

8. A laboratory ventilation and purification device according to claim 5, characterized in that: A material distribution member (6) is provided at the upper end of each material containing cavity (201), the material distribution member (6) comprising a second auger shaft (61) and a second auger blade (62), the second auger shaft (61) being rotatably arranged in the material containing cavity (201) horizontally, and the second auger blade (62) being mounted on the second auger shaft (61).

9. A laboratory ventilation and purification device according to claim 8, characterized in that: A driving structure (7) is provided at each rotating shaft (41) and the second auger shaft (61). The driving structure (7) comprises a driving rod (71), a rack (72) and a gear (73). The driving rod (71) slides along the radial direction of the feeding barrel (51) and penetrates the side wall of the feeding barrel (51). An elastic member (74) for driving the driving rod (71) to reset is provided between the driving rod (71) and the second filter plate (22). The driving rod (71) is directed toward the feeding barrel (51). An inclined surface 4 is provided at one end of the auger shaft (52), and the inclined surface 4 is inclined from top to bottom in a direction away from the axis of the feed barrel (51). When the auger shaft (52) rotates, the outer peripheral side of the auger blade (53) can contact the inclined surface 4 provided on the drive rod (71). The rack (72) is provided at the end of the drive rod (71) away from the feed barrel (51). The gear (73) is connected to the end of the rotating shaft (41) or the auger shaft (61), and the rack (72) and the gear (73) are meshed for transmission.

10. A laboratory ventilation and purification device according to claim 3, characterized in that: A material collecting member (8) is also provided in the box body (1), and the material collecting member (8) includes a material collecting box (81) and a material collecting pipe (82). A plurality of material collecting boxes (81) are provided, and are respectively provided corresponding to the plurality of rows of filtering mechanisms (2). Two adjacent material collecting boxes (81) are connected via the plurality of material collecting pipes (82). A material taking port for taking materials is provided on the material collecting box (81) at the bottom layer. A material discharge cavity (202) provided at the lower end of the second filter plate (22) is connected to the corresponding material collecting box (81), and a slope five is provided in the material discharge cavity (202), and the slope five is inclined from top to bottom in a direction close to the material collecting box (81).

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