An intelligent ventilation duct for laboratories

Abstract

The invention discloses an intelligent ventilation pipe for a laboratory, comprising a Y-shaped shunt pipe, two shunt plates, two first servo motors, two filter installation pipes, two high-efficiency filters, two groups of filter collection assemblies, two filter mounting seats, two groups of lifting assemblies and a Y-shaped confluence pipe, wherein the two filter installation pipes are respectively arranged at the two outlet ends of the Y-shaped shunt pipe, and the free ends of the two filter installation pipes are respectively connected to the two inlet ends of the Y-shaped confluence pipe, the two shunt plates are respectively rotatably arranged in the Y-shaped shunt pipe and the Y-shaped confluence pipe, the two high-efficiency filters are respectively arranged on the two filter mounting seats, the filter collection assemblies are respectively arranged on the filter mounting seats, the two groups of lifting assemblies are respectively arranged at the upper ends of the filter installation pipes, and the two filter mounting seats are respectively connected to the two groups of lifting assemblies; the invention can keep the ventilation pipe in the laboratory working when the high-efficiency filters are replaced.

Description

Technical Field

[0001] The invention relates to the field of laboratory ventilation, and in particular to an intelligent ventilation pipe used in a laboratory. Background Art

[0002] At present, ventilation equipment is an indispensable equipment in the laboratory. Some laboratories have high requirements for the quality of air entering the laboratory, so they need to use high-efficiency filters to filter the air entering the laboratory. After a period of use, dust and stains will accumulate inside the high-efficiency filter, which needs to be disassembled and replaced. At present, when replacing the high-efficiency filter, the general laboratory ventilation device needs to disconnect the ventilation system to prevent unfiltered air from entering the laboratory, which makes it impossible to maintain a ventilated environment in the laboratory. In addition, when the staff removes and replaces the high-efficiency filter, the high-efficiency filter is full of dust and toxic substances filtered from the air. Dust and toxic substances are easily stirred and diffused when the high-efficiency filter is removed and replaced, causing damage to the staff. Summary of the invention

[0003] The technical problem to be solved by the present invention is to propose an intelligent ventilation duct for a laboratory in view of the shortcomings of the above-mentioned prior art. The present invention has a simple structure, is easy to operate, safe and reliable, and is easy to disassemble. When the staff replaces the high-efficiency filter, the ventilation in the laboratory can still be maintained. At the same time, during the process of removing and replacing the high-green filter, the high-efficiency filter can be put into a collection bag to avoid the diffusion of dust and toxic substances in the high-efficiency filter.

[0004] In order to solve the above technical problems, the technical solution of the present invention is realized in the following manner: an intelligent ventilation pipe for a laboratory, comprising a Y-shaped flow dividing pipe, two flow dividing plates, two first servo motors, two filter installation pipes, two high-efficiency filters, two sets of filter collection assemblies, two filter mounting seats, two sets of lifting assemblies, a Y-shaped converging pipe and a set of circuit control components;

[0005] The two filter installation pipes are respectively arranged at the two outlet ends of the Y-shaped diversion pipe, and the two filter installation pipes are also respectively connected to the two inlet ends of the Y-shaped confluence pipe;

[0006] Two high-efficiency filters are respectively arranged on two sets of filter collection assemblies, and the two sets of filter collection assemblies are respectively arranged on two filter mounting seats, and the two filter mounting seats are slidably arranged in the filter mounting pipe, and the filter mounting seats slide up and down along the vertical plane in the filter mounting pipe, and the two sets of lifting assemblies are respectively arranged at the upper end of the outside of the filter mounting pipe, and the two filter mounting seats are respectively connected to the two sets of lifting assemblies;

[0007] The filter collection assembly includes a collection sleeve bottom plate, a flexible sleeve bag, a bag mouth frame, a base bracket, two buffer rods, two buffer springs, four support blocks and four thrust springs; the lower end of the collection sleeve bottom plate is connected to a first flange plate through a support pipe, the first flange plate is connected to the upper end of the base bracket, the lower end of the flexible sleeve bag is connected to the edge of the collection sleeve bottom plate, and the upper end of the flexible sleeve bag is connected to the edge of the bag mouth frame; a second flange plate is provided at the lower end of the base bracket, and two buffer rods are symmetrically arranged at the upper end of the second flange plate along the length direction of the second flange plate; the lower end of the high-efficiency filter is connected to the upper end of the collection sleeve bottom plate;

[0008] The filter mounting seat is a rectangular frame with a closed upper end and an open lower end. Two track holes are formed downwardly at the upper end of the filter mounting seat. The track holes extend downwardly to the side wall of the filter mounting seat. The bottom end of each track hole is formed downwardly with a sliding hole that penetrates the side wall of the filter mounting seat. Four T-shaped slide grooves that match the support block are formed downwardly at the upper end of the filter mounting seat and near the four top corners. The T-shaped slide grooves extend downwardly to the side wall of the filter mounting seat. A guide rod is provided in each T-shaped slide groove, and a second limiting nut is provided at the upper end of the guide rod; a filter mounting sleeve is sleeved in the filter mounting seat. The filter The upper end of the mounting sleeve is fixedly connected to the upper end of the filter mounting seat, and a sliding gap is provided between the outer wall of the filter mounting sleeve and the inner wall of the filter mounting seat. Four limit plate through holes are provided at the upper end of the filter mounting seat and close to the four vertex corners and corresponding to the sliding gap, and the T-shaped slide groove is connected to the sliding gap; the lower end of the filter mounting seat is provided with a rectangular groove matched with the second flange plate, and the filter mounting seat and the filter mounting sleeve are provided with ventilation gaps on both side ends along the thickness direction, and elastic sealing pads are attached to the edges of the ventilation gaps on both side walls in the thickness direction of the inner side of the filter mounting sleeve;

[0009] A limit plate is provided in the filter installation pipeline at a position corresponding to the limit plate through hole;

[0010] The high-efficiency filter is sleeved in the filter installation sleeve, and the two side end edges of the high-efficiency filter along the thickness direction are against the elastic sealing gasket. The first flange plate is slidably matched with the inner wall of the filter mounting seat. The two buffer rods respectively pass through the sliding holes at the bottom ends of the two track holes and extend into the track holes. The two buffer springs are respectively sleeved on the two buffer rods. The upper end of the buffer rod is provided with a first limiting nut. The lower end of the buffer spring is against the bottom end of the track hole, and the upper end of the buffer spring is against the first limiting nut. The second flange plate is embedded in the rectangular groove and is connected to the lower end of the filter mounting seat by bolts. The first flange plate is abutted against the lower end of the filter installation sleeve, the support tube is abutted against the elastic sealing gasket, the bag mouth frame is slidably arranged in the sliding gap, the four support blocks are sleeved on the guide rods in the four T-shaped slide grooves, and the support blocks are slidably matched with the T-shaped slide grooves, one end of the support block extends into the sliding gap, and the lower end of the bag mouth frame is abutted against the upper ends of the four support blocks; the four thrust springs are respectively sleeved on the guide rods in the four T-shaped slide grooves, the lower end of the thrust spring is abutted against the lower end of the T-shaped slide groove, the upper end of the thrust spring is abutted against the support block, and the limit plate passes through the limit plate through hole and abuts against the bag mouth frame;

[0011] The first servo motor 3 is electrically connected to the circuit control component, and the lifting component is electrically connected to the circuit control component.

[0012] The present invention provides two high-efficiency filtering channels for the ventilation equipment of the laboratory by providing a Y-shaped shunt pipe, a Y-shaped confluence pipe and two filter installation pipes. When the ventilation equipment supplies air, the air sent into the Y-shaped shunt pipe is sent to one high-efficiency filter for filtering through a shunt plate, and the channel where the other high-efficiency filter is located is closed. When it is necessary to replace the used high-efficiency filter, the air sent into the Y-shaped shunt pipe is sent to the other high-efficiency filter for filtering through the shunt plate, thereby facilitating the disassembly and replacement of the used high-efficiency filter and maintaining ventilation in the laboratory. By cooperating with the provided lifting component and the circuit control component, The high-efficiency filter can be slowly dropped from the laboratory roof, which is convenient for operators to replace the high-efficiency filter; through the cooperation of the set support block, thrust spring and limit plate, when the filter mounting seat slides into the filter mounting pipe, the bag mouth frame is supported to keep the flexible bag in a contracted state, thereby preventing the flexible bag from affecting the ventilation equipment to transport air to the high-efficiency filter; and when the filter mounting seat descends, the thrust spring pushes the support block to make the bag mouth frame gradually slide upwards, and the flexible bag gradually enters the sliding gap, so that the high-efficiency filter is placed in the flexible bag as a whole, thereby preventing the dust and harmful substances accumulated in the high-efficiency filter from spreading.

[0013] The technical solution further defined in the present invention is:

[0014] The Y-shaped flow-dividing pipe is composed of an air inlet pipe and two flow-dividing pipes. The two flow-dividing pipes are arranged at the same end of the air inlet pipe. The two flow-dividing pipes and the air inlet pipe form a Y shape. A first servo motor is arranged outside the Y-shaped flow-dividing pipe and corresponds to the connection between the two flow-dividing pipes. The output shaft of the first servo motor extends into the Y-shaped flow-dividing pipe. A flow-dividing plate is sleeved on the output shaft of the first servo motor. The flow-dividing plate is slidably matched with the inner wall of the Y-shaped flow-dividing pipe. One end of the two flow-dividing pipes away from the air inlet pipe is respectively connected to the two filter installation pipes. The ends are connected; a first wind blocking plate is provided on the inner wall of each shunt pipe and at one end close to the Y-shaped shunt pipe, the first wind blocking plate is in a rectangular ring shape, a first sealing ring is provided on the end of the first wind blocking plate close to the Y-shaped shunt pipe, and the shunt plate arranged in the Y-shaped shunt pipe is symmetrically provided with two first wind blocking grooves at both ends along the thickness direction, and the side walls of the first wind blocking groove are slidably matched with the first sealing ring, and the thickness of the first sealing ring is greater than the depth of the first wind blocking groove; the structure is simple, and the flow direction of the wind sent into the Y-shaped shunt pipe by the ventilation equipment can be controlled according to demand.

[0015] The Y-shaped confluence duct is composed of an exhaust duct and two confluence ducts, the two confluence ducts are both arranged at the same end of the exhaust duct, and a Y shape is formed between the two confluence ducts and the exhaust duct. Another first servo motor is arranged outside the Y-shaped confluence duct and corresponds to the connection between the two confluence ducts. The output shaft of the first servo motor extends into the Y-shaped confluence duct, and another diverter plate is sleeved on the output shaft of the first servo motor, and the diverter plate is slidably matched with the inner wall of the Y-shaped confluence duct; one end of the two confluence ducts away from the exhaust duct is respectively connected to the other end of the two filter installation ducts; a second wind blocking plate is provided on the inner wall of each confluence duct and at one end close to the Y-shaped confluence duct, the second wind blocking plate is in a rectangular ring shape, and a second sealing ring is provided on the end of the second wind blocking plate close to the Y-shaped confluence duct, and two second wind blocking grooves are symmetrically provided at both ends of the diverter plate arranged in the Y-shaped confluence duct in the thickness direction, and the side wall of the second wind blocking groove is slidably matched with the second sealing ring, and the thickness of the second sealing ring is greater than the depth of the second wind blocking groove; the structure is simple and can avoid backflow of filtered air.

[0016] The circuit control component comprises a PLC controller and a control panel, the PLC controller is electrically connected to the control panel; the first servo motor is electrically connected to the PLC controller; the circuit is controlled to be on and off by the PLC controller, the structure is simple, and the cost is saved.

[0017] Two rectangular ring-shaped sealing plates are symmetrically arranged at both ends of the filter mounting seat; two U-shaped baffles are arranged inside the filter mounting pipe, and the two U-shaped baffles are symmetrically arranged along the length direction of the filter mounting pipe. The gap between one end of the filter mounting pipe along the length direction and a nearby U-shaped baffle forms a slot, the sealing plate is slidably arranged in the slot, and the filter mounting seat and the U-shaped baffle are slidably matched. A first sealing airbag is arranged on the inner wall of the filter mounting pipe and between the U-shaped baffles. The first sealing airbag is U-shaped and attached to the inner wall of the filter mounting pipe. The first sealing airbag avoids the limit plate setting The upper end and two side walls of the filter mounting seat are covered with a layer of silicone pad, and a through hole is provided on the silicone pad corresponding to the through hole of the limit plate, and the silicone pad and the first sealing airbag are abutted against each other; the lower end of the sealing plate is connected to a bottom plate, and a sealing ring is provided on the bottom plate around the filter mounting seat, and the lower end of the filter mounting pipe is abutted against the sealing ring; the provided sealing plate cooperates with the U-shaped baffle to preliminarily reduce the gap between the filter mounting seat and the filter mounting pipe, and the gap between the filter mounting seat and the filter mounting pipe is further reduced through the cooperation of the first sealing airbag and the silicone pad, thereby preventing the wind sent in by the ventilation equipment from flowing into the laboratory without passing through the high-efficiency filter.

[0018] The inflation port of the first sealed airbag is provided with a first solenoid valve, one end of the first solenoid valve is connected to an electric air pump through an air guide tube, the electric air pump is fixedly arranged on the outer wall of the filter mounting pipe, and the exhaust port of the first sealed airbag is provided with a second solenoid valve; the first solenoid valve, the electric air pump and the second solenoid valve are all electrically connected to the PLC controller; the structure is simple and the operation is convenient.

[0019] Each lifting assembly includes two second servo motors, two motor seats, two track mounting plates, two bidirectional lead screws, two bearing seats, two track rods, four lead screw sliders and two groups of cross-shear telescopic frames; the two second servo motors are respectively arranged on the two motor seats, the two motor seats are respectively fixedly arranged on one end of the two track mounting plates, the two bidirectional lead screws are respectively connected to the output shafts of the two second servo motors through connecting sleeves, the two bearing seats are respectively arranged on the other end of the two track mounting plates, the end of the bidirectional lead screw away from the second servo motor is sleeved on the bearing seat, a track rod is provided between each bearing seat and the corresponding motor seat, two lead screw sliders are provided on the sliding sleeve of each bidirectional lead screw, the two lead screw sliders are symmetrically arranged on the bidirectional lead screw, and the lead screw sliders and the track rods are slidably matched, the two lead screw sliders on each bidirectional lead screw are respectively hinged to the two telescopic rods at one end of a group of cross-shear telescopic frames, and the two telescopic rods at the other end of the group of cross-shear telescopic frames are hinged to the bottom plate; through the cross-shear telescopic frame, the extension and retraction of the cross-shear telescopic frame drives the filter mounting seat to rise and fall, thereby facilitating the staff to replace the high-efficiency filter.

[0020] The bag mouth frame is composed of two transverse rods and four longitudinal rods. The four longitudinal rods are arranged in groups of two, and each group of two longitudinal rods is hinged. The two transverse rods are arranged side by side, and the two ends of the two transverse rods are hinged through two groups of longitudinal rods. The bag mouth frame can be folded and deformed after leaving the sliding gap, thereby reducing the upper end diameter of the flexible bag.

[0021] A first neodymium magnet is provided on one side end of each transverse rod close to another transverse rod, and the magnetic pole of each first neodymium magnet is different from that of the other first neodymium magnet. The upper end of the flexible bag can be tightened by the cooperation of the first neodymium magnet to prevent the dust and harmful substances accumulated in the high-efficiency filter from spreading.

[0022] The beneficial effects of the present invention are as follows: through the technical solution of the present invention, a laboratory ventilation device is provided, which provides two high-efficiency filtering channels for the laboratory's ventilation equipment through the Y-shaped shunt pipe, the Y-shaped confluence pipe and the two filter installation pipes. When the ventilation equipment supplies air, the wind sent into the Y-shaped shunt pipe is sent to a high-efficiency filter for filtering through the shunt plate, and the channel where the other high-efficiency filter is located is closed. When the used high-efficiency filter needs to be replaced, the wind sent into the Y-shaped shunt pipe is sent to the other high-efficiency filter for filtering through the shunt plate, thereby facilitating the disassembly and replacement of the used high-efficiency filter and maintaining ventilation in the laboratory; by cooperating with the provided lifting component and the circuit control component, the high-efficiency filter can be easily replaced. The filter slowly falls from the laboratory roof, making it easy for operators to replace the high-efficiency filter; through the cooperation of the support block, thrust spring and limit plate, when the filter mounting seat slides into the filter mounting pipe, the bag mouth frame is supported to keep the flexible bag in a contracted state, preventing the flexible bag from affecting the ventilation equipment to transport air to the high-efficiency filter, and when the filter mounting seat descends, the thrust spring pushes the support block to make the bag mouth frame gradually slide upward, and the flexible bag gradually fits into the sliding gap, so that the high-efficiency filter is placed in the flexible bag as a whole, avoiding the diffusion of dust and harmful substances accumulated in the high-efficiency filter; through the cooperation of the first neodymium magnet, the upper end of the flexible bag can be tightened to avoid the diffusion of dust and harmful substances accumulated in the high-efficiency filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 An axial view of the present invention as a whole;

[0024] Figure 2 for Figure 1 A partial enlarged view in the middle;

[0025] Figure 3 It is a rear view of the present invention;

[0026] Figure 4 for Figure 3 Sectional view at the middle BB;

[0027] Figure 5 for Figure 4 The partial enlarged view at D in the middle;

[0028] Figure 6 for Figure 4 The local enlarged view at E in the middle;

[0029] Figure 7 for Figure 6 A partial enlarged view of the G in the middle

[0030] Figure 8 for Figure 4 The partial enlarged view at F in the middle;

[0031] Fig. 9 for Figure 3 Sectional view at CC;

[0032] Fig.10 for Fig. 9 The local enlarged view at H in the middle;

[0033] Fig.11 This is an upper axial structural view of the filter mounting seat 6 of the present invention after it is disassembled separately;

[0034] Fig.12 This is the lower axial structural view of the filter mounting seat 6 after it is disassembled separately in the present invention

[0035] Fig.13 This is a separate disassembled axial structural view of the bag opening frame 34 of the present invention;

[0036] Fig.14 This is a separate disassembled axial structural view of the base bracket 35 of the present invention;

[0037] Fig.15 This is an axial structural view of the high efficiency filter 5 and a set of filter collection components after being assembled in the present invention;

[0038] Fig.16 for Fig.15 Right view of;

[0039] Fig.17 for Fig.16 Sectional view at JJ in the middle;

[0040] Fig.18 for Fig.17 A partial magnified view of the K in the middle;

[0041] Among them: 1-Y-shaped diversion pipeline, 1a-air inlet pipe, 1b-diversion pipe, 2-diversion plate, 2a-first air blocking slot, 2b-second air blocking slot, 3-first servo motor, 3a-Velcro, 4-filter installation pipeline, 4a-limiting plate, 5-high efficiency filter, 6-filter mounting seat, 6a-sealing plate, 6b-limiting plate through hole, 7-Y-shaped confluence pipeline, 7a-exhaust pipe, 7b-confluence pipe, 8-PLC controller, 9-control panel, 9a-fixing card, 10-U-shaped baffle, 11-sealing airbag, 12-silicone pad, 13-bottom plate, 15-sealing ring, 16-first solenoid valve, 17-air guide pipe, 18-electric air pump, 19-second solenoid valve, 20-second servo motor, 21-motor seat, 22-mounting plate, 23-bidirectional screw, 24 -bearing seat, 25-track rod, 26-screw slider, 27-cross-shear telescopic frame, 27a-telescopic rod, 28-first wind baffle, 29-first sealing ring, 30-second wind baffle, 31-second sealing ring, 32-collection sleeve bottom plate, 33-flexible sleeve bag, 34-bag mouth frame, 34a-transverse rod, 34b-longitudinal rod, 35-base bracket, 35a-second flange plate, 36-support block, 37-support tube, 38-first flange plate, 39-track hole, 39a-sliding through hole, 40-filter mounting sleeve, 41-second limiting nut, 42-elastic sealing pad, 43-T-shaped slide groove, 44-sliding gap, 45-buffer rod, 45a-first limiting nut, 46-buffer spring, 47-thrust spring, 48-guide rod, 49-first neodymium magnet. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0043] Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Example 1

[0045] like Figure 1 As shown, an intelligent ventilation pipe for a laboratory comprises a Y-shaped flow dividing pipe 1, two flow dividing plates 2, two first servo motors 3, two filter installation pipes 4, two high efficiency filters 5, two filter installation seats 6, two lifting components, a Y-shaped converging pipe 7 and a group of circuit control components;

[0046] Two filter installation pipes 4 are respectively arranged at two outlet ends of the Y-shaped flow dividing pipe 1, and the two filter installation pipes 4 are also respectively connected to two inlet ends of the Y-shaped flow converging pipe 7;

[0047] like Figure 6 As shown, two high-efficiency filters 5 are respectively arranged on two groups of filter collection assemblies, and the two groups of filter collection assemblies are respectively arranged on two filter mounting seats 6, and the two filter mounting seats 6 are slidably arranged in the filter mounting pipe 4, and the filter mounting seats 6 slide up and down along the vertical plane in the filter mounting pipe 4, and two groups of lifting assemblies are respectively arranged at the upper end of the outside of the filter mounting pipe 4, and the two filter mounting seats 6 are respectively connected to the two groups of lifting assemblies; the lifting and lowering of the filter mounting seat 6 is controlled by the lifting assembly, so that the high-efficiency filter 5 is lowered from the top of the laboratory.

[0048] The filter collection assembly includes a collecting sleeve bottom plate 32, a flexible sleeve bag 33, a bag mouth frame 34, a base bracket 35, two buffer rods 45, two buffer springs 46, four support blocks 36 and four thrust springs 47; the lower end of the collecting sleeve bottom plate 32 is connected to a first flange plate 38 through a support tube 37, the first flange plate 38 is connected to the upper end of the base bracket 35, the lower end of the flexible sleeve bag 33 is connected to the edge of the collecting sleeve bottom plate 32, and the upper end of the flexible sleeve bag 33 is connected to the edge of the bag mouth frame 34; the lower end of the base bracket 35 is provided with a second flange plate 35a, and two buffer rods 45 are symmetrically arranged at the upper end of the second flange plate 35a along the length direction of the second flange plate 35a; the lower end of the high efficiency filter 5 is connected to the upper end of the collecting sleeve bottom plate 32;

[0049] The filter mounting seat 6 is a rectangular frame with a closed upper end and an open lower end. Two track holes 39 are formed downwardly at the upper end of the filter mounting seat 6. The track holes 39 extend downwardly to the side wall of the filter mounting seat 6. The bottom end of each track hole 39 is formed downwardly with a sliding hole 39a that penetrates the side wall of the filter mounting seat 6. Four T-shaped slide grooves 43 that match the bracket 36 are formed downwardly at the upper end of the filter mounting seat 6 and near the four top corners. The T-shaped slide grooves 43 extend downwardly to the side wall of the filter mounting seat 6. A guide rod 48 is provided in each T-shaped slide groove 43, and a second limiting nut 41 is provided at the upper end of the guide rod 48; a filter mounting sleeve 40 is sleeved in the filter mounting seat 6. The upper end of the filter mounting sleeve 40 is fixedly connected to the upper end of the filter mounting seat 6, and a sliding gap 44 is provided between the outer wall of the filter mounting sleeve 40 and the inner wall of the filter mounting seat 6. Four limit plate through holes 6b are provided at the upper end of the filter mounting seat 6 and close to the four vertex corners and corresponding to the sliding gap 44, and the T-shaped slide groove 43 is connected to the sliding gap 44; the lower end of the filter mounting seat 6 is provided with a rectangular groove 40a that matches the second flange plate 35a, and the filter mounting seat 6 and the filter mounting sleeve 40 are provided with ventilation gaps on both sides along the thickness direction, and elastic sealing pads 42 are attached to the edges of the ventilation gaps on both side walls of the filter mounting sleeve 40 in the thickness direction;

[0050] A limit plate 4a is provided in the filter installation pipe 4 at a position corresponding to the limit plate through hole 6b;

[0051] The high-efficiency filter 5 is sleeved in the filter mounting sleeve 40, and the two side end edges of the high-efficiency filter 5 along the thickness direction are against the elastic sealing gasket 42, so as to seal the two side end edges of the high-efficiency filter 5 along the thickness direction and the filter mounting sleeve 40 to prevent air from leaking from the gap between the high-efficiency filter 5 and the filter mounting sleeve 40; the first flange plate 38 is slidably matched with the inner wall of the filter mounting seat 6, and the two buffer rods 45 respectively pass through the sliding holes 39a at the bottom ends of the two track holes 39 and extend into the track holes 39, and the two buffer springs 46 are respectively sleeved on the two buffer rods 45, and the upper end of the buffer rod 45 is provided with a first limiting nut 45a, and the lower end of the buffer spring 46 is connected to the bottom end of the track hole 39 The upper end of the buffer spring 46 is against the first limiting nut 45a, the second flange plate 35a is embedded in the rectangular groove 40a, and is connected to the lower end of the filter mounting seat 6 by bolts. After the bolts connecting the second flange plate 35a and the filter mounting seat 6 are removed, the high-efficiency filter 5 slides down under the influence of gravity. When the high-efficiency filter 5 slides down, the two buffer rods 45 slide down synchronously, and the first limiting nut 45a at the upper end thereof applies pressure to the buffer spring 46, and the buffer spring 46 applies reverse thrust to the first limiting nut 45a, slowing down the speed of the high-efficiency filter 5, so that the high-efficiency filter 5 slides down slowly, preventing the high-efficiency filter 5 from sliding down too fast, and its inertia force causing damage to the entire device;

[0052] The first flange plate 38 abuts against the lower end of the filter mounting sleeve 40, the support tube 37 abuts against the elastic sealing pad 42, the bag mouth frame 34 is slidably arranged in the sliding gap 44, the four support blocks 36 are sleeved on the guide rods 48 in the four T-shaped slide grooves 43, and the support blocks 36 slide and cooperate with the T-shaped slide grooves 43, one end of the support block 36 extends into the sliding gap 44, and the lower end of the bag mouth frame 34 abuts against the upper ends of the four support blocks 36; the four thrust springs 47 are respectively sleeved on the guide rods 48 in the four T-shaped slide grooves 43, the lower ends of the thrust springs 47 abut against the lower ends of the T-shaped slide grooves 43, the upper ends of the thrust springs 47 abut against the support blocks 36, the limit plate 4a passes through the limit plate through hole 6b and abuts against the bag mouth frame 34; during the sliding of the filter mounting seat 6, the limit plate 4a gradually disengages from the sliding gap 44 , the limiting plate 4a gradually moves away from the bag opening frame 34, and the thrust of the limiting plate 4a imposed by the thrust spring 47 gradually decreases, and the thrust spring 47 gradually pushes the support block 36 to slide up, thereby driving the bag opening frame 34 to slide upward, and the bag opening frame 34 drives the bag opening of the flexible sleeve 33 to slide up, and the flexible sleeve 33 slides to the top of the sliding gap 44, thereby gradually covering the entire high-efficiency filter 5; in the process of the filter mounting seat 6 sliding up, the limiting plate 4a passes through the limiting plate through hole 6b and gradually slides to the bottom of the sliding gap 44. In this process, the limiting plate 4a pushes the bag opening frame 34 to slide downward in the sliding gap 44, and the thrust spring 47 is compressed by force, so that the bag opening of the flexible sleeve 33 is located at the lower end of the high-efficiency filter 5, so as to prevent the flexible sleeve 33 from blocking the fresh air from being delivered to the high-efficiency filter 5 during the use of the high-efficiency filter 5.

[0053] The first servo motor 3 is electrically connected to the circuit control component, and the lifting component is electrically connected to the circuit control component;

[0054] like Figure 5 As shown, the Y-shaped flow-dividing pipe 1 is composed of an air inlet pipe 1a and two flow-dividing pipes 1b. The two flow-dividing pipes 1b are arranged at the same end of the air inlet pipe 1a. The two flow-dividing pipes 1b and the air inlet pipe 1a form a Y shape. The ventilation equipment collects the outside air and sends it into the air inlet pipe 1a. A first servo motor 3 is arranged outside the Y-shaped flow-dividing pipe 1 and corresponds to the connection between the two flow-dividing pipes 1b. The output shaft of the first servo motor 3 extends into the Y-shaped flow-dividing pipe 1. A flow-dividing plate 2 is sleeved on the first servo motor 3. The first servo motor 3 is on the output shaft, and the diverter plate 2 is slidably matched with the inner wall of the Y-shaped diverter pipe 1. The first servo motor 3 is started, and its output shaft rotates, driving the diverter plate 2 to rotate, thereby adjusting the position of the diverter plate 2. According to the needs of the staff, the diverter plate 2 is used to block different diverter pipes 1b; the diverter plate 2 blocks the end of one diverter pipe 1b, so that the wind sent into the air inlet pipe 1a flows into the other diverter pipe 1b, and the wind is introduced into the filter installation pipe 4 connected thereto through the diverter pipe 1b for filtration;

[0055] A first air blocking plate 28 is provided on the inner wall of each shunt pipe 1b and at one end close to the Y-shaped shunt pipe 1. The first air blocking plate 28 is in a rectangular ring shape. A first sealing ring 29 is provided on the end of the first air blocking plate 28 close to the Y-shaped shunt pipe 1. The shunt plate 2 arranged in the Y-shaped shunt pipe 1 is symmetrically provided with two first air blocking grooves 2a at both ends along the thickness direction, and the side wall of the first air blocking groove 2a is slidably matched with the first sealing ring 29, and the thickness of the first sealing ring 29 is greater than the depth of the first air blocking groove 2a; the first sealing ring 29 is embedded in the first air blocking groove 2, and the shunt plate 2 is pressed against the first sealing ring 29, so as to block the port of one shunt pipe 1b, so as to prevent the air sent in by the ventilation equipment from entering the unactivated high-efficiency filter 5

[0056] One end of the two shunt pipes 1b away from the air inlet pipe 1a is connected to one end of the two filter installation pipes 4 respectively, and preferably welding is used to fix the shunt pipes 1b and the filter installation pipes 4;

[0057] like Figure 7 As shown, the Y-shaped confluence duct 7 is composed of an exhaust duct 7a and two confluence ducts 7b. The two confluence ducts 7b are both arranged at the same end of the exhaust duct 7a. The two confluence ducts 7b and the exhaust duct 7a form a Y shape. The air filtered in the filter installation duct 4 flows into the confluence duct 7b connected to the filter installation duct 4. At the same time, another diverter plate 2 blocks the end of the other confluence duct 7b to prevent the filtered air from flowing back into the other confluence duct 7b, so that the filtered air is discharged from the exhaust duct 7a. The other second diverter plate 2 blocks the end of the other confluence duct 7b to prevent the filtered air from flowing back into the other confluence duct 7b, so that the filtered air is discharged from the exhaust duct 7a. A servo motor 3 is arranged outside the Y-shaped confluence pipe 7 and corresponds to the connection between the two confluence pipes 7b. The output shaft of the first servo motor 3 extends into the Y-shaped confluence pipe 7. Another diverter plate 2 is sleeved on the output shaft of the first servo motor 3. The diverter plate 2 is slidably matched with the inner wall of the Y-shaped confluence pipe 7. When the first servo motor 3 is started, its output shaft rotates, driving the diverter plate 2 to rotate, thereby adjusting the position of the diverter plate 2. Based on the needs of the staff, the diverter plate 2 is used to cover different confluence pipes 7b;

[0058] A second air blocking plate 30 is provided on the inner wall of each confluence pipe 7b and at one end close to the Y-shaped confluence pipe 7. The second air blocking plate 30 is in a rectangular ring shape. A second sealing ring 31 is provided on the second air blocking plate 30 at one end close to the Y-shaped confluence pipe 7. The splitter plate 2 arranged in the Y-shaped confluence pipe 7 is symmetrically provided with two second air blocking grooves 2b at both ends along the thickness direction, and the side walls of the second air blocking grooves 2b are slidably matched with the second sealing ring 31, and the thickness of the second sealing ring 31 is greater than the depth of the second air blocking groove 2b; the second sealing ring 31 is embedded in the second air blocking groove 2b, and the second sealing ring 31 of the splitter plate 2 is pressed tightly, thereby blocking the port of a confluence pipe 7b to prevent the filtered air from entering the unactivated high-efficiency filter 5

[0059] like Figure 1 As shown, the circuit control component includes a PLC controller 8 and a control panel 9. The control panel 9 is fixed on the wall of the laboratory. The PLC controller 8 and the control panel 9 are electrically connected to the power supply in the laboratory. The PLC controller 8 and the control panel 9 are electrically connected. The staff inputs instructions to the PLC controller 8 through the control panel 9, thereby controlling the on and off of the lifting component circuit through the PLC controller 8; the first servo motor 3 is electrically connected to the PLC controller 8, and the start and stop of the first servo motor 3 are controlled by the PLC controller 8.

[0060] like Figure 6 As shown, two rectangular annular sealing plates 6a are symmetrically arranged at both ends of the filter mounting seat 6; two U-shaped baffles 10 are arranged inside the filter mounting pipe 4, and the two U-shaped baffles 10 are symmetrically arranged along the length direction of the filter mounting pipe 4. The gap between one end of the filter mounting pipe 4 along the length direction and a nearby U-shaped baffle 10 constitutes a slot, and the sealing plate 6a is slidably arranged in the slot, and the filter mounting seat 6 and the U-shaped baffle 10 are slidably matched, and the sealing plate 6a and the U-shaped baffle 10 are matched, which can preliminarily block the airflow sent by part of the ventilation equipment from entering the gap between the filter mounting seat 6 and the filter mounting pipe 4;

[0061] A first sealing airbag 11 is provided on the inner wall of the filter mounting pipe 4 and at a position between the U-shaped baffles 10. The first sealing airbag 11 is U-shaped and attached to the inner wall of the filter mounting pipe 4. The first sealing airbag 11 is arranged to avoid the limiting plate 4a. The upper end and two side walls of the filter mounting seat 6 are covered with a layer of silicone pad 12. The silicone pad 12 is provided with a through hole corresponding to the limiting plate through hole 6b, and the silicone pad 12 and the first sealing airbag 11 are abutted against each other; the lower end of the sealing plate 6a is connected to a bottom plate 13, and a sealing ring 15 is provided on the bottom plate 13 around the filter mounting seat 6. The lower end of the filter mounting pipe 4 is abutted against the sealing ring 15. The first sealing airbag 11 expands after being inflated, thereby pressing against the silicone pad 12, preventing the airflow sent by the ventilation equipment from entering the gap between the filter mounting seat 6 and the filter mounting pipe 4, and enhancing the air tightness between the filter mounting seat 6 and the filter mounting pipe 4.

[0062] The inflation port of the first sealed airbag 11 is provided with a first solenoid valve 16, one end of the first solenoid valve 16 is connected to an electric air pump 18 through an air guide tube 17, the electric air pump 18 is fixedly arranged on the outer wall of the filter installation pipe 4, and the exhaust port of the first sealed airbag 11 is provided with a second solenoid valve 19; the first solenoid valve 16, the electric air pump 18 and the second solenoid valve 19 are all electrically connected to the PLC controller 8; the staff can control the first solenoid valve 16 and the electric air pump 18 to connect the circuit through the control panel 9, the first solenoid valve 16 is opened, and the electric air pump 18 pumps air into the first sealed airbag 11 to expand the first sealed airbag 11, and after a certain period of time, the first solenoid valve 16 is closed, and the electric air pump 18 stops working, so that the first sealed airbag 11 remains inflated;

[0063] When the high efficiency filter 5 needs to be replaced, the staff can control the second solenoid valve 19 to be connected through the control panel 9, the second solenoid valve 19 opens, discharges the air in the first sealing airbag 11, and then lowers the filter installation pipe 4.

[0064] like Figure 2 As shown, each lifting assembly includes two second servo motors 20, two motor seats 21, two track mounting plates 22, two bidirectional screw rods 23, two bearing seats 24, two track rods 25, four screw sliders 26 and two sets of cross-scissor telescopic frames 27; the two second servo motors 20 are respectively arranged on the two motor seats 21, the two motor seats 21 are respectively fixedly arranged on one end of the two track mounting plates 22, the two bidirectional screw rods 23 are respectively connected to the output shafts of the two second servo motors 20 through the connecting sleeves 16, and the two bearing seats 24 are respectively arranged on the other end of the two track mounting plates 22. One end of the bidirectional screw rod 23 away from the second servo motor 20 is sleeved on the bearing seat 24, and a track rod 25 is provided between each bearing seat 24 and the corresponding motor seat 21. Two screw sliders 26 are slidably sleeved on each bidirectional screw rod 23. The two screw sliders 26 are symmetrically arranged on the bidirectional screw rod 23, and the screw sliders 26 and the track rod 25 are slidably matched. The two screw sliders 26 on each bidirectional screw rod 23 are respectively hinged to two telescopic rods 27a at one end of a group of cross-scissor type telescopic frames 27, and the two telescopic rods 27a at the other end of the group of cross-scissor type telescopic frames 27 are hinged to the bottom plate 13;

[0065] The working process of the lifting assembly is as follows: the staff can input instructions to the PLC controller 8 through the control panel 9, and the PLC controller 8 controls two second servo motors 20 in a group of lifting assemblies to start at the same time, and the output shafts of the two second servo motors 20 rotate synchronously. When the output shafts of the second servo motors 20 rotate, the bidirectional screw rod 23 is driven to rotate in situ. When the bidirectional screw rod 23 rotates, the two screw sliders 26 arranged thereon slide synchronously in opposite directions, thereby driving the hinged cross-scissor-type telescopic frame 27 thereon to extend and unfold. When the cross-scissor-type telescopic frame 27 is extended and unfolded, it drives the filter mounting seat 6 to slide up and down.

[0066] The bag mouth frame 34 is composed of two transverse rods 34a and four longitudinal rods 34b. The four longitudinal rods 34b are grouped in pairs, and each group of two longitudinal rods 34b are hinged. The two transverse rods 34a are arranged side by side, and the two ends of the two transverse rods 34a are hinged through two groups of longitudinal rods 34b. After the base bracket 35 is slid to the lowermost end, the bag mouth frame 34 is disengaged from the sliding gap 44 and is still on the support block 36. After the bolts connecting the first flange plate 38 and the base bracket 35 are removed, the high-efficiency filter 5, the flexible bag 33, the bag mouth frame 34 and the collecting sleeve bottom plate 32 are removed from the base bracket 35 together, and the bag mouth frame 34 is folded, and the bag mouth of the flexible bag 33 is tightened by the attraction of the two first neodymium magnets 49.

[0067] A first neodymium magnet 49 is disposed on one side end of each transverse rod 34 a adjacent to another transverse rod 34 a , and the magnetic poles of each first neodymium magnet 49 adjacent to another first neodymium magnet 49 are different.

[0068] The use process of this embodiment is as follows: when the laboratory needs ventilation, the staff inputs instructions to the PLC controller 8 through the control panel 9, the two first servo motors 3 are started, and the two diverter plates 2 block the diverter pipe 1b and the converging pipe 7b located at both ends of the same filter installation pipeline 4, and the wind sent in by the ventilation equipment passes through a high-efficiency filter 5 for filtering;

[0069] When it is necessary to replace the used high-efficiency filter 5, the staff inputs instructions to the PLC controller 8 through the control panel 9, the two first servo motors 3 are started, and the two diverter plates 2 block the diverter pipe 1b and the confluence pipe 7b at both ends of the filter installation pipeline 4 where the high-efficiency filter 5 is located, so that the wind sent in by the ventilation equipment is filtered through another high-efficiency filter 5, and then inputs instructions to the PLC controller 8 through the control panel 9, and the PLC controller 8 first controls the second electromagnetic valve 19 circuit to be connected, and the second electromagnetic valve 19 is opened to discharge the air in the first sealing airbag 11, so that the first sealing airbag 11 is disconnected from the silicone pad 12, and then P The LC controller 8 then controls the two second servo motors 20 in the lifting assembly corresponding to the high-efficiency filter 5 to be replaced to start at the same time, and the output shafts of the two second servo motors 20 rotate synchronously. When the output shafts of the second servo motors 20 rotate, the bidirectional screw rod 23 is driven to rotate in situ. When the bidirectional screw rod 23 rotates, the two screw sliders 26 arranged thereon slide synchronously in opposite directions, thereby driving the cross-scissor-type telescopic frame 27 hinged thereon to unfold. When the cross-scissor-type telescopic frame 27 unfolds, the filter mounting seat 6 is driven to descend, thereby driving the high-efficiency filter 5 to be replaced to descend. After reaching a suitable height, the two second servo motors 20 are synchronously stopped to suspend the high-efficiency filter 5.

[0070] During the sliding movement of the filter mounting seat 6, the limiting plate 4a gradually disengages from the sliding gap 44, the limiting plate 4a gradually moves away from the bag opening frame 34, the thrust of the limiting plate 4a exerted by the thrust spring 47 gradually decreases, the thrust spring 47 gradually pushes the support block 36 to slide upward, thereby driving the bag opening frame 34 to slide upward, the bag opening frame 34 drives the bag opening of the flexible sleeve 33 to slide upward, and the flexible sleeve 33 slides to the top of the sliding gap 44, thereby gradually covering the entire high-efficiency filter 5;

[0071] After the staff removes the bolts connecting the second flange plate 35a and the filter mounting seat 6, the high-efficiency filter 5 slides down due to the influence of gravity. When the high-efficiency filter 5 slides down, the two buffer rods 45 slide down synchronously, and the first limiting nut 45a at the upper end thereof applies pressure to the buffer spring 46, and the buffer spring 46 applies a reverse thrust to the first limiting nut 45a, slowing down the speed of the high-efficiency filter 5 sliding down, so that the high-efficiency filter 5 slowly slides down to the lowest position, and the connection between the first flange plate 38 and the base bracket 35 is closed. After the bolts are removed, the high-efficiency filter 5, the flexible bag 33, the bag opening frame 34 and the collecting sleeve bottom plate 32 are removed from the base bracket 35, and the bag opening frame 34 is folded, and the bag opening of the flexible bag 33 is tightened by the two first neodymium magnets 49. After the new high-efficiency filter 5, the bag opening frame 34, the flexible bag 33 and the collecting sleeve bottom plate 32 are assembled, the collecting sleeve bottom plate 32 is connected to the base bracket 35 by bolts, and then the bag opening frame 34 is placed on the four support blocks 36 corresponding to the sliding gap 44;

[0072] The staff inputs instructions to the PLC controller 8 through the control panel 9, and the PLC controller 8 controls the output shafts of the two second servo motors 20 to rotate synchronously. When the output shaft of the second servo motor 20 rotates, it drives the bidirectional screw rod 23 to rotate in situ. When the bidirectional screw rod 23 rotates, the two screw rod sliders 26 arranged thereon slide synchronously in opposite directions, thereby driving the cross-shear type telescopic frame 27 hinged thereon to contract. When the cross-shear type telescopic frame 27 contracts, it drives the filter mounting seat 6 to rise, thereby driving the replaced filter mounting seat 6 to rise, and the second After the output shaft of the servo motor 20 rotates a certain number of times, the lower end of the filter installation pipe 4 is pressed against the sealing ring 15. During the upward sliding process of the filter installation seat 6, the limit plate 4a passes through the limit plate through hole 6b and gradually slides to the bottom of the sliding gap 44. In this process, the limit plate 4a pushes the bag opening frame 34 to slide downward in the sliding gap 44, and the thrust spring 47 is compressed, so that the bag opening of the flexible bag 33 is finally located at the lower end of the high-efficiency filter 5, so as to avoid the flexible bag 33 blocking the fresh air from entering the high-efficiency filter 5 during the use of the high-efficiency filter 5.

[0073] The PLC controller 8 then controls the first solenoid valve 16 and the electric air pump 18 to connect the circuits. The first solenoid valve 16 opens, and the electric air pump 18 pumps air into the first sealed airbag 11 to expand the first sealed airbag 11. After a certain period of time, the first solenoid valve 16 is closed, and the electric air pump 18 stops working, so that the first sealed airbag 11 remains inflated, thereby pressing the first sealed airbag 11 against the silicone pad 12.

[0074] The above embodiments are only for illustrating the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the present invention.

Claims

1. An intelligent ventilation duct for a laboratory, characterized in that: It includes a Y-shaped flow dividing pipe, two flow dividing plates, two first servo motors, two filter installation pipes, two high-efficiency filters, two sets of filter collection assemblies, two filter installation seats, two sets of lifting assemblies, a Y-shaped converging pipe and a set of circuit control components; The two filter installation pipes are respectively arranged at the two outlet ends of the Y-shaped diversion pipe, and the two filter installation pipes are also respectively connected to the two inlet ends of the Y-shaped confluence pipe; Two high-efficiency filters are respectively arranged on two sets of filter collection assemblies, and the two sets of filter collection assemblies are respectively arranged on two filter mounting seats, and the two filter mounting seats are slidably arranged in the filter mounting pipe, and the filter mounting seats slide up and down along the vertical plane in the filter mounting pipe, and the two sets of lifting assemblies are respectively arranged at the upper end of the outside of the filter mounting pipe, and the two filter mounting seats are respectively connected to the two sets of lifting assemblies; The filter collection assembly includes a collecting sleeve bottom plate, a flexible sleeve bag, a bag mouth frame, a base bracket, two buffer rods, two buffer springs, four support blocks and four thrust springs; the lower end of the collecting sleeve bottom plate is connected to a first flange plate through a support tube, the first flange plate is connected to the upper end of the base bracket, the lower end of the flexible sleeve bag is connected to the edge of the collecting sleeve bottom plate, and the upper end of the flexible sleeve bag is connected to the edge of the bag mouth frame; a second flange plate is provided at the lower end of the base bracket, and two buffer rods are symmetrically arranged at the upper end of the second flange plate along the length direction of the second flange plate; the lower end of the high-efficiency filter is connected to the upper end of the collecting sleeve bottom plate; The filter mounting seat is a rectangular frame with a closed upper end and an open lower end. The upper end of the filter mounting seat is formed with two track holes downwardly, and the track holes extend downwardly to the side wall of the filter mounting seat. The bottom end of each track hole is formed downwardly with a sliding hole that penetrates the side wall of the filter mounting seat. Four T-shaped slide grooves that match the support block are formed downwardly at the upper end of the filter mounting seat and near the four top corners. The T-shaped slide grooves extend downwardly to the side wall of the filter mounting seat. A guide rod is provided in each T-shaped slide groove, and a second limiting nut is provided at the upper end of the guide rod; a filter mounting sleeve is sleeved in the filter mounting seat ... The upper end of the filter mounting sleeve is fixedly connected to the upper end of the filter mounting seat, and a sliding gap is provided between the outer wall of the filter mounting sleeve and the inner wall of the filter mounting seat. Four limit plate through holes are provided at the upper end of the filter mounting seat and close to the four vertex corners and corresponding to the sliding gap, and the T-shaped slide groove is connected to the sliding gap; the lower end of the filter mounting seat is provided with a rectangular groove matched with the second flange plate, and the filter mounting seat and the filter mounting sleeve are provided with ventilation gaps on both side ends along the thickness direction, and elastic sealing pads are attached to the edges of the ventilation gaps on both side walls in the thickness direction of the inner side of the filter mounting sleeve; A limit plate is provided in the filter installation pipeline at a position corresponding to the limit plate through hole; The high-efficiency filter is sleeved in the filter mounting sleeve, and the two side end edges of the high-efficiency filter along the thickness direction are against the elastic sealing gasket. The first flange plate is slidably matched with the inner wall of the filter mounting seat. The two buffer rods respectively pass through the sliding holes at the bottom ends of the two track holes and extend into the track holes. The two buffer springs are respectively sleeved on the two buffer rods. The upper end of the buffer rod is provided with a first limiting nut. The lower end of the buffer spring is against the bottom end of the track hole, and the upper end of the buffer spring is against the first limiting nut. The second flange plate is embedded in the rectangular groove and is connected to the lower end of the filter mounting seat by bolts. The first flange plate is abutted against the lower end of the filter installation sleeve, the support tube is abutted against the elastic sealing gasket, the bag mouth frame is slidably arranged in the sliding gap, the four support blocks are sleeved on the guide rods in the four T-shaped slide grooves, and the support blocks are slidably matched with the T-shaped slide grooves, one end of the support block extends into the sliding gap, and the lower end of the bag mouth frame is abutted against the upper ends of the four support blocks; the four thrust springs are respectively sleeved on the guide rods in the four T-shaped slide grooves, the lower end of the thrust spring is abutted against the lower end of the T-shaped slide groove, the upper end of the thrust spring is abutted against the support block, and the limit plate passes through the limit plate through hole and abuts against the bag mouth frame; The first servo motor is electrically connected to the circuit control component, and the lifting component is electrically connected to the circuit control component.

2. The intelligent ventilation duct for a laboratory according to claim 1, characterized in that: The Y-shaped diversion duct is composed of an air inlet duct and two diversion tubes, the two diversion tubes are both arranged at the same end of the air inlet duct, and a Y shape is formed between the two diversion tubes and the air inlet duct. A first servo motor is arranged on the outside of the Y-shaped diversion duct and corresponds to the connection between the two diversion tubes. The output shaft of the first servo motor extends into the Y-shaped diversion duct, and a diversion plate is sleeved on the output shaft of the first servo motor, and the diversion plate is slidably matched with the inner wall of the Y-shaped diversion duct; one end of the two diversion tubes away from the air inlet duct is respectively connected to one end of the two filter installation ducts; a first wind blocking plate is provided on the inner wall of each diversion tube and at one end close to the Y-shaped diversion duct, the first wind blocking plate is in a rectangular ring shape, and a first sealing ring is provided on one end of the first wind blocking plate close to the Y-shaped diversion duct, and two first wind blocking grooves are symmetrically provided at both ends of the diversion plate arranged in the Y-shaped diversion duct along the thickness direction, and the side wall of the first wind blocking groove is slidably matched with the first sealing ring, and the thickness of the first sealing ring is greater than the depth of the first wind blocking groove.

3. The intelligent ventilation duct for a laboratory according to claim 1, characterized in that: The Y-shaped confluence duct is composed of an exhaust duct and two confluence ducts, the two confluence ducts are both arranged at the same end of the exhaust duct, and a Y shape is formed between the two confluence ducts and the exhaust duct. Another first servo motor is arranged outside the Y-shaped confluence duct and corresponds to the connection between the two confluence ducts. The output shaft of the first servo motor extends into the Y-shaped confluence duct, and another diverter plate is sleeved on the output shaft of the first servo motor, and the diverter plate is slidably matched with the inner wall of the Y-shaped confluence duct; one end of the two confluence ducts away from the exhaust duct is respectively connected to the other end of the two filter installation ducts; a second wind blocking plate is provided on the inner wall of each confluence duct and at one end close to the Y-shaped confluence duct, the second wind blocking plate is in a rectangular ring shape, and a second sealing ring is provided on the end of the second wind blocking plate close to the Y-shaped confluence duct, and two second wind blocking grooves are symmetrically provided at both ends of the diverter plate arranged in the Y-shaped confluence duct in the thickness direction, and the side wall of the second wind blocking groove is slidably matched with the second sealing ring, and the thickness of the second sealing ring is greater than the depth of the second wind blocking groove.

4. The intelligent ventilation duct for a laboratory according to claim 1, characterized in that: The circuit control component includes a PLC controller and a control panel, and the PLC controller is electrically connected to the control panel; the first servo motor is electrically connected to the PLC controller.

5. The intelligent ventilation duct for a laboratory according to claim 1, characterized in that: Two rectangular annular sealing plates are symmetrically provided at both ends of the filter mounting seat; two U-shaped baffles are provided inside the filter mounting pipe, and the two U-shaped baffles are symmetrically arranged along the length direction of the filter mounting pipe. The gap between one end of the filter mounting pipe along the length direction and a nearby U-shaped baffle forms a slot, the sealing plate is slidably arranged in the slot, and the filter mounting seat and the U-shaped baffle are slidably matched, a first sealing airbag is provided on the inner wall of the filter mounting pipe and at a position between the U-shaped baffles, the first sealing airbag is U-shaped and attached to the inner wall of the filter mounting pipe, the first sealing airbag is arranged to avoid the limit plate, the upper end and two side walls of the filter mounting seat are covered with a layer of silicone pad, and the silicone pad is provided with through holes corresponding to the through holes of the limit plate, and the silicone pad and the first sealing airbag are abutted against each other; the lower end of the sealing plate is connected to a bottom plate, and a sealing ring is provided on the bottom plate around the filter mounting seat, and the lower end of the filter mounting pipe is abutted against the sealing ring.

6. The intelligent ventilation duct for a laboratory according to claim 5, characterized in that: A first solenoid valve is provided at the inflation port of the first sealed airbag, one end of the first solenoid valve is connected to an electric air pump through an air guide tube, the electric air pump is fixedly arranged on the outer wall of the filter mounting pipe, and a second solenoid valve is provided at the exhaust port of the first sealed airbag; the first solenoid valve, the electric air pump and the second solenoid valve are all electrically connected to the PLC controller.

7. The intelligent ventilation duct for a laboratory according to claim 4, characterized in that: Each group of the lifting components includes two second servo motors, two motor seats, two track mounting plates, two bidirectional lead screws, two bearing seats, two track rods, four lead screw sliders and two groups of cross-scissor type telescopic frames; the two second servo motors are respectively arranged on the two motor seats, and the two motor seats are respectively fixedly arranged on one end of the two track mounting plates, and the two bidirectional lead screws are respectively connected to the output shafts of the two second servo motors through connecting sleeves, and the two bearing seats are respectively arranged on the other end of the two track mounting plates, and the end of the bidirectional lead screw away from the second servo motor is sleeved on the bearing seat, and a track rod is provided between each bearing seat and the corresponding motor seat, and two lead screw sliders are provided on each bidirectional lead screw sliding sleeve, and the two lead screw sliders are symmetrically arranged on the bidirectional lead screw, and the lead screw slider and the track rod are slidably matched, and the two lead screw sliders on each bidirectional lead screw are respectively hinged to the two telescopic rods at one end of a group of cross-scissor type telescopic frames, and the two telescopic rods at the other end of the group of cross-scissor type telescopic frames are hinged to the bottom plate.

8. The intelligent ventilation duct for a laboratory according to claim 1, characterized in that: The bag opening frame is composed of two transverse rods and four longitudinal rods. The four longitudinal rods are arranged in groups of two, and each group of two longitudinal rods is hinged. The two transverse rods are arranged side by side, and the two ends of the two transverse rods are hinged through the two groups of longitudinal rods.

9. The intelligent ventilation duct for a laboratory according to claim 8, characterized in that: A first neodymium magnet is disposed on a side end of each transverse rod close to another transverse rod, and a magnetic pole of each first neodymium magnet is different from a side end of each first neodymium magnet close to another first neodymium magnet.

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