CN114832877A - Full-automatic variable air volume adjusting device for biosafety cabinet - Google Patents
Full-automatic variable air volume adjusting device for biosafety cabinet Download PDFInfo
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- CN114832877A CN114832877A CN202210637882.7A CN202210637882A CN114832877A CN 114832877 A CN114832877 A CN 114832877A CN 202210637882 A CN202210637882 A CN 202210637882A CN 114832877 A CN114832877 A CN 114832877A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L7/00—Heating or cooling apparatus; Heat insulating devices
- B01L7/02—Water baths; Sand baths; Air baths
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L1/00—Enclosures; Chambers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
本发明公开了一种全自动生物安全柜用变风量调节装置，包括安全柜，其中，所述安全柜为可开合密闭的箱体，所述安全柜上方中心设有贯穿其内部的送风腔，所述送风腔内设有导流风扇；所述送风腔上方为储气腔，所述储气腔内设有多个储气组件，每个所述储气组件通过多路阀连接到外部的空压机中所述送风腔内设有圆锥形的进风锥，所述进风锥下固定有倒圆台形的导流柱，所述导流柱与安全柜固定连接，且所述导流柱的上方的外壁套设有风量调节组件，且所述风量调节组件与安全柜顶部连接。与现有技术相比，本发明安全柜内能够恒温，气流平顺缓和，调整安全柜内的进风量时压差变化小，压力波动小，防止气流温差和压差影响安全柜内的生物环境。
The invention discloses a variable air volume adjusting device for an automatic biological safety cabinet, comprising a safety cabinet, wherein the safety cabinet is an openable, closed and airtight box body, and an air supply penetrating through the inside of the safety cabinet is arranged in the center above the safety cabinet. The air supply cavity is provided with a guide fan; above the air supply cavity is an air storage cavity, and a plurality of air storage components are arranged in the air storage cavity, and each of the air storage components passes through a multi-way valve In the air compressor connected to the outside, a conical air inlet cone is arranged in the air supply cavity, and an inverted truncated truncated guide column is fixed under the air inlet cone, and the guide column is fixedly connected with the safety cabinet. And the outer wall above the guide column is sleeved with an air volume adjustment component, and the air volume adjustment component is connected with the top of the safety cabinet. Compared with the prior art, the safety cabinet of the present invention can maintain a constant temperature, the air flow is smooth and gentle, the pressure difference changes little when the air intake volume in the safety cabinet is adjusted, the pressure fluctuation is small, and the airflow temperature difference and pressure difference can be prevented from affecting the biological environment in the safety cabinet.
Description
Technical Field
The invention relates to the technical field of biological experimental equipment, in particular to a variable air volume adjusting device for a full-automatic biosafety cabinet.
Background
The biological safety cabinet is a box-shaped air purification negative pressure safety device which can prevent aerosol from dissipating when some dangerous or unknown biological particles are contained in the experimental operation and treatment process. The protective screen is widely applied to scientific research, teaching, clinical examination and production in the fields of microbiology, biomedicine, genetic engineering, biological products and the like, and is the most basic safety protective equipment in the primary protective screen in the biological safety of laboratories.
The working principle of the biological safety cabinet is mainly that air in the cabinet is sucked outwards, so that the interior of the cabinet is kept in a negative pressure state, and workers are protected by vertical air flow; the outside air is filtered by the high-efficiency air filter and then enters the safety cabinet to avoid the pollution of the processed sample; the air in the cabinet is also filtered by the HEPA filter and then discharged to the atmosphere to protect the environment. However, the laboratory needs to be ventilated and then discharged, the pressure fluctuation in the biological safety laboratory is large in the process of opening and closing the air intake device, the air volume adjustment is complex, the room pressure difference gradient is difficult to control, the biological environment in the safety cabinet is influenced, and the biological safety risk exists. Furthermore, the air drawn from the outside may have a temperature different from the constant temperature inside the safety cabinet, requiring further constant temperature inside the safety cabinet, and may also affect the biological environment inside the safety cabinet.
Therefore, there is a need to provide a variable air volume adjusting device for a fully automatic biosafety cabinet, so as to solve the problems in the background art.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: the variable air volume adjusting device for the full-automatic biological safety cabinet comprises a safety cabinet, wherein the safety cabinet is an openable and closable closed box body, an air supply cavity penetrating through the safety cabinet is arranged in the center above the safety cabinet, and a flow guide fan is arranged in the air supply cavity;
a gas storage cavity is arranged above the air supply cavity, a plurality of gas storage components are arranged in the gas storage cavity, and each gas storage component is connected to an external air compressor through a multi-way valve;
the air supply cavity is internally provided with a conical air inlet cone, an inverted truncated cone-shaped flow guide column is fixed below the air inlet cone, the flow guide column is fixedly connected with the safety cabinet, an air volume adjusting assembly is sleeved on the outer wall of the upper portion of the flow guide column, and the air volume adjusting assembly is connected with the top of the safety cabinet.
Further, as preferred, the safety cabinet bottom is erected with a bottom plate in an overhead manner, the edge of the bottom plate and the inner wall of the safety cabinet are separated by an air outlet seam, and an air outlet penetrating through the outside of the safety cabinet is connected in the space between the bottom plate and the bottom of the safety cabinet.
Further, as preferred, the gas storage subassembly includes the gas holder, gas holder circumference evenly distributed is in the gas storage intracavity, the gas storage chamber top is the top cap, the gas storage chamber below is the bottom, the gas holder top has the admission valve that runs through the top cap to the one-way air inlet above that, and flexible admission valve passes through the multiple unit valve and is connected to in the outside air compressor machine, the gas holder below has the solenoid valve that runs through the bottom to the one-way air outlet of its air supply intracavity.
Further, as a preferred option, a water inlet is formed in the side wall below the gas storage cavity, a water outlet is formed in the side wall above the gas storage cavity in the opposite direction of the water inlet, and the water inlet and the water outlet are connected to an external constant temperature water tank through a circulating pump.
Preferably, the air storage cavity is an annular cylinder with a central hole, a rotating shaft penetrating from the top cover to the bottom cover is rotatably arranged in the central hole, the upper end of the rotating shaft is connected to an output shaft of a motor fixed on the top cover, and the lower end of the rotating shaft is connected to a flow guide fan in the air supply cavity.
Further, preferably, the air volume adjusting assembly comprises a fixing ring, the fixing ring is fixedly connected to the inner wall of the top of the safety cabinet, the fixing ring and the air supply cavity are concentric and mutually sealed, and the inner diameter of the fixing ring is larger than the maximum outer diameters of the air inlet cone and the flow guide column;
a plurality of vertically arranged fixed separation blades are uniformly distributed on the periphery below the fixed ring, adjacent fixed separation blades are mutually attached and sealed, and a certain gap is formed between each fixed separation blade and the outer wall of the flow guide column at interval;
every the edge of fixed separation blade below articulates there is the activity separation blade, and laminates each other between adjacent activity separation blade sealed, just the activity separation blade can rotate the outer wall of laminating the water conservancy diversion post.
Further, preferably, a rotating ring is rotatably sleeved on the outer wall of the fixing ring, and a plurality of first universal rods are uniformly distributed on the circumference of the rotating ring;
every rotationally be connected with the right angle connecting rod on the surface of fixed separation blade, the right angle department of right angle connecting rod rotationally is connected with fixed separation blade, the one end of right angle connecting rod is connected to the one end that the swivel was kept away from to universal rod one, the other end of right angle connecting rod is connected with universal rod two, the other end of universal rod two is connected to in the surface of activity separation blade.
Further, as preferred, solid fixed ring passes through servo cylinder and is connected with the change, servo cylinder's cylinder body is articulated with solid fixed ring, servo cylinder's cylinder piston rod articulates there is a slice commentaries on classics tongue, the other end and the change of commentaries on classics tongue are articulated.
Further, as preferred, the change is established the flange of solid fixed ring bottom through the cover and is connected rather than rotationally, just be equipped with rotatory packing ring between change inner wall and the flange outer wall.
Preferably, a plurality of guide wheels which are rotatably connected with the fixing ring are distributed on the circumference of the bottom of the fixing ring, the wheel surfaces of the guide wheels are attached to the outer wall of the rotating ring, and the wheel rims of the guide wheels are pressed in the bottom surface of the rotating ring. Compared with the prior art, the invention has the beneficial effects that:
according to the invention, an external air compressor is used for sequentially storing air for the air storage tank, and circulating constant-temperature water flow is introduced into an air storage cavity through a circulating pump so as to carry out heat exchange on air in the air storage tank; air in the air storage tank is sequentially discharged into the air supply cavity from long to short according to the water bath time of the gas in the air storage tank through the electromagnetic valve, so that constant-temperature air flow is continuously provided for the air supply cavity, the temperature in the safety cabinet can be kept constant, and the biological environment in the safety cabinet is prevented from being influenced by the temperature difference of the air flow.
According to the invention, the air quantity flowing into the safety cabinet from the air supply cavity can be controlled by controlling the size of the annular gap between the annular shape enclosed by each movable baffle and the flow guide column, and the air flow is smoothly and moderately flowed into the safety cabinet by attaching to the outer wall of the flow guide column, so that the pressure difference change is small when the air inlet quantity in the safety cabinet is adjusted, the pressure fluctuation is small, and the biological environment in the safety cabinet is prevented from being influenced.
Drawings
FIG. 1 is a schematic structural diagram of an air volume adjusting device for a full-automatic biosafety cabinet;
FIG. 2 is a schematic diagram of a gas storage module of an air volume adjusting device for a fully automatic biosafety cabinet;
FIG. 3 is a schematic view of an air volume adjusting assembly of the variable air volume adjusting device for the full-automatic biosafety cabinet;
FIG. 4 is a schematic view of a swivel structure of an air volume adjusting device for a fully automatic biosafety cabinet;
in the figure: 1. a safety cabinet; 2. an air supply cavity; 21. a flow guiding fan; 3. a gas storage cavity; 4. a gas storage component; 5. a flow guide column; 6. an air volume adjusting component; 7. an air inlet cone; 8. a base plate; 81. gas outlet seam; 9. an air outlet; 411. a water inlet; 412. a water outlet; 42. a top cover; 43. a bottom cover; 44. a gas storage tank; 441. an intake valve; 442. an electromagnetic valve; 45. a motor; 46. a rotating shaft; 61. a fixing ring; 62. fixing a baffle plate; 63. a movable baffle plate; 64. rotating the ring; 641. a guide wheel; 65. a first universal rod; 66. a right-angle connecting rod; 67. a second universal rod; 68. a servo cylinder; 681. a cylinder piston rod; 69. turning the tongue; 610. a rotation washer; 611. a flange.
Detailed Description
Referring to fig. 1, in an embodiment of the present invention, an air volume adjusting device for a full-automatic biological safety cabinet includes a safety cabinet 1, wherein the safety cabinet 1 is an openable and closable box, an air supply cavity 2 penetrating through the safety cabinet 1 is disposed at the center above the safety cabinet, and a flow guiding fan 21 is disposed in the air supply cavity 2;
a gas storage cavity 3 is arranged above the air supply cavity 2, a plurality of gas storage components 4 are arranged in the gas storage cavity 3, and each gas storage component 4 is connected to an external air compressor through a multi-way valve;
the air supply cavity 2 is internally provided with a conical air inlet cone 7, the air inlet cone 7 is fixedly provided with a reverse circular truncated cone-shaped flow guide column 5, the flow guide column 5 is fixedly connected with the safety cabinet 1, the outer wall of the upper part of the flow guide column 5 is sleeved with an air volume adjusting assembly 6, and the air volume adjusting assembly 6 is connected with the top of the safety cabinet 1.
In this embodiment, a bottom plate 8 is erected on the overhead ground at the bottom of the safety cabinet 1, an air outlet gap 81 is formed between the edge of the bottom plate 8 and the inner wall of the safety cabinet 1, and an air outlet 9 penetrating outside the safety cabinet 1 is connected in a space between the bottom plate 8 and the bottom of the safety cabinet 1;
an exhaust fan and a purification device are connected outside the air outlet.
Referring to fig. 2, in the present embodiment, the air storage assembly 4 includes an air storage tank 44, the air storage tank 44 is uniformly distributed in the air storage cavity 3, a top cover 42 is disposed above the air storage cavity 3, a bottom cover 43 is disposed below the air storage cavity 3, an air inlet valve 441 for one-way air inlet is disposed above the air storage tank 44 and penetrates through the top cover 42, the telescopic air inlet valve 441 is connected to an external air compressor through a multi-way valve, and an electromagnetic valve 442 for one-way air outlet is disposed below the air storage tank 44 and penetrates through the bottom cover 43 into the air supply cavity 2.
In this embodiment, a water inlet 411 is formed in a side wall below the gas storage cavity 3, a water outlet 412 is formed in a side wall above the gas storage cavity 3, opposite to the water inlet 411, and the water inlet 411 and the water outlet 412 are connected to an external constant temperature water tank through a circulating pump;
that is, the circulating constant temperature water flow is introduced into the air storage cavity 3 from the water inlet 411 to the water outlet 412, so that the air in the air storage tank 44 can be subjected to water bath temperature control, and the air in the air storage tank 44 is kept uniform;
moreover, the air is sequentially introduced into and discharged from the plurality of air storage tanks 44, so that the air in each air storage tank 44 has enough water bath temperature control time, can perform sufficient heat exchange with the water in the air storage cavity 3, and is continuously supplied to the air supply cavity 2.
In this embodiment, the air storage cavity 3 is an annular cylinder with a central hole, a rotating shaft 46 penetrating from the top cover 42 to the bottom cover 43 is rotatably arranged in the central hole, the upper end of the rotating shaft 46 is connected to an output shaft of a motor 45 fixed on the top cover 42, and the lower end of the rotating shaft 46 is connected to a guide fan 21 in the air supply cavity 2;
the motor 45 drives the diversion fan 21 to rotate, so that the air discharged from the electromagnetic valve 442 can uniformly flow downwards and can uniformly flow on the surface of the air inlet cone 7, and the air flows into the safety cabinet 1 through the air quantity adjusting assembly 6 and attached to the outer wall of the diversion column 5.
Referring to fig. 3, in the present embodiment, the air volume adjusting assembly 6 includes a fixing ring 61, the fixing ring 61 is fixedly connected to an inner wall of the top of the safety cabinet 1, the fixing ring 61 and the blowing cavity 2 are concentric and sealed with each other, and an inner diameter of the fixing ring 61 is greater than a maximum outer diameter of the air inlet cone 7 and the diversion column 5;
a plurality of vertically arranged fixing blocking pieces 62 are uniformly distributed on the periphery below the fixing ring 61, adjacent fixing blocking pieces 62 are mutually attached and sealed, and a certain gap is formed between each fixing blocking piece 62 and the outer wall of the guide column 5;
every the edge below fixed separation blade 62 articulates there is movable separation blade 63, and the laminating is sealed each other between adjacent movable separation blade 63, just movable separation blade 63 can rotate to the outer wall of laminating guide post 5.
In this embodiment, the outer wall of the fixed ring 61 is rotatably sleeved with a rotating ring 64, and a plurality of first universal rods 65 are uniformly distributed on the circumference of the rotating ring 64;
a right-angle connecting rod 66 is rotatably connected to the outer surface of each fixed blocking piece 62, the right angle of the right-angle connecting rod 66 is rotatably connected with the fixed blocking piece 62, one end of the right-angle connecting rod 66 is connected to one end, away from the rotating ring 64, of a first universal rod 65, the other end of the right-angle connecting rod 66 is connected with a second universal rod 67, and the other end of the second universal rod 67 is connected into the outer surface of the movable blocking piece 63;
that is, the rotating swivel 64 can push the right angle link 66 to rotate through the first universal rod 65, so that the distance from the other end of the right angle link 66 to the hinge line between the fixed stop 62 and the movable stop 63 changes, and the second universal rod 67 pushes the movable stop 63 to rotate, so that the movable stop is far away from or attached to the diversion column 5;
therefore, the air quantity flowing into the safety cabinet 1 from the air supply cavity 2 can be controlled by controlling the size of the annular gap between the annular shape surrounded by each movable baffle plate 63 and the flow guide column 5, and because the air flow is attached to the outer wall of the flow guide column 5 and flows into the safety cabinet 1, the air flow is smooth and mild, the pressure difference change is small when the air inlet quantity in the safety cabinet 1 is adjusted, the pressure fluctuation is small, and the biological environment in the safety cabinet 1 is prevented from being influenced.
In this embodiment, the fixed ring 61 is connected with the rotating ring 64 through a servo cylinder 68, a cylinder body of the servo cylinder 68 is hinged with the fixed ring 61, a cylinder piston rod 681 of the servo cylinder 68 is hinged with a rotating tongue 69, and the other end of the rotating tongue 69 is hinged with the rotating ring 64;
the servo cylinder 68 is driven to extend and contract, thereby driving the swivel 64 to rotate, and the swivel tongue 69 prevents the cylinder piston rod 681 from colliding with the swivel 64 during extension and contraction.
Referring to fig. 4, in the present embodiment, the rotating ring 64 is rotatably connected to the flange 611 sleeved at the bottom of the fixed ring 61, a rotating washer 610 is disposed between an inner wall of the rotating ring 64 and an outer wall of the flange 611, and the rotating washer 610 is made of a polytetrafluoroethylene material, which can generate a self-lubricating material during a friction process, thereby reducing a friction force between the rotating ring 64 and the flange 611.
In this embodiment, a plurality of guide wheels 641 rotatably connected to the fixing ring 61 are distributed on the bottom circumference of the fixing ring 61, a wheel surface of the guide wheel 641 is attached to the outer wall of the rotating ring 64, and a rim of the guide wheel 641 is pressed in the bottom surface of the rotating ring 64;
it should be noted that the guide wheels 641 are not disposed in the movable range of the rotation tongue 69 to prevent them from colliding with each other.
When the method is specifically implemented, firstly, an external air compressor is used for sequentially storing air for the air storage tank 44, and circulating constant-temperature water flow is introduced into the air storage cavity 3 through a circulating pump so as to carry out heat exchange on the air in the air storage tank 44;
the air in the air storage tank 44 is sequentially discharged into the air supply cavity 2 from long to short according to the water bath time of the gas in the air storage tank 44 through the electromagnetic valve 442, and the air compressor continuously supplies air to the empty air storage tank 44, so that constant-temperature air flow is continuously supplied into the air supply cavity 2, the temperature in the safety cabinet 1 can be constant, and the biological environment in the safety cabinet 1 is prevented from being influenced by the air flow temperature difference;
the diversion fan 21 is driven to rotate by the motor 45, so that air discharged from the electromagnetic valve 442 uniformly flows downwards and can uniformly flow on the surface of the air inlet cone 7, and the air quantity is regulated by the air quantity regulating component 6 and flows into the safety cabinet 1 by adhering to the outer wall of the diversion column 5;
the specific flow of the air quantity adjusting assembly 6 for adjusting the air quantity is as follows: the rotating ring 64 is driven to rotate through the telescopic servo cylinder 68, at the moment, the first universal rod 65 pushes the right-angle connecting rod 66 to rotate, the distance from the other end of the right-angle connecting rod 66 to the hinge line of the fixed blocking piece 62 and the movable blocking piece 63 is changed, and the second universal rod 67 pushes the movable blocking piece 63 to rotate so as to enable the movable blocking piece to be far away from or attached to the flow guide column 5;
the air quantity flowing into the safety cabinet 1 from the air supply cavity 2 can be controlled by controlling the size of an annular gap between the annular space formed by the surrounding of each movable baffle piece 63 and the flow guide column 5, and the air flow is smoothly and moderately attached to the outer wall of the flow guide column 5 and flows into the safety cabinet 1, so that the pressure difference change is small when the air inlet quantity in the safety cabinet 1 is adjusted, the pressure fluctuation is small, and the biological environment in the safety cabinet 1 is prevented from being influenced;
the air flow in the safety cabinet 1 is discharged out of the air outlet 9 connected with the exhaust fan and the purification device through the air outlet gap 81.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (10)
1. The variable air volume adjusting device for the full-automatic biological safety cabinet comprises a safety cabinet (1) and is characterized in that the safety cabinet (1) is an openable and closable closed box body, an air supply cavity (2) penetrating through the safety cabinet (1) is arranged in the center above the safety cabinet, and a flow guide fan (21) is arranged in the air supply cavity (2);
a gas storage cavity (3) is arranged above the air supply cavity (2), a plurality of gas storage components (4) are arranged in the gas storage cavity (3), and each gas storage component (4) is connected to an external air compressor through a multi-way valve;
be equipped with conical inlet cone (7) in air supply chamber (2), be fixed with inverted frustum shape's guide post (5) under inlet cone (7), guide post (5) and safety cabinet (1) fixed connection, just the outer wall cover of the top of guide post (5) is equipped with air regulation subassembly (6), just air regulation subassembly (6) are connected with safety cabinet (1) top.
2. The variable air volume adjusting device for the full-automatic biological safety cabinet according to claim 1, wherein a bottom plate (8) is erected on the bottom of the safety cabinet (1) in an overhead manner, an air outlet seam (81) is arranged between the edge of the bottom plate (8) and the inner wall of the safety cabinet (1) at an interval, and an air outlet (9) penetrating through the outside of the safety cabinet (1) is connected in a space between the bottom plate (8) and the bottom of the safety cabinet (1).
3. The variable air volume adjusting device for the fully automatic biosafety cabinet according to claim 1, wherein the air storage module (4) comprises air storage tanks (44), the air storage tanks (44) are circumferentially and uniformly distributed in the air storage cavity (3), a top cover (42) is arranged above the air storage cavity (3), a bottom cover (43) is arranged below the air storage cavity (3), one-way air inlet valves (441) penetrating through the top cover (42) to the top cover are arranged above the air storage tanks (44), the telescopic air inlet valves (441) are connected to an external air compressor through a multi-way valve, and one-way air outlet solenoid valves (442) penetrating through the bottom cover (43) to the air supply cavity (2) of the air storage tanks (44).
4. The variable air volume adjusting device for the full-automatic biosafety cabinet according to claim 3, wherein a water inlet (411) is formed in a side wall below the gas storage cavity (3), a water outlet (412) is formed in a side wall above the gas storage cavity (3) and opposite to the water inlet (411), and the water inlet (411) and the water outlet (412) are connected to an external constant temperature water tank through a circulating pump.
5. The variable air volume adjusting device for the full-automatic biosafety cabinet according to claim 3, wherein the air storage chamber (3) is a ring-shaped cylinder with a central hole, a rotating shaft (46) penetrating from the top cover (42) to the bottom cover (43) is rotatably arranged in the central hole, the upper end of the rotating shaft (46) is connected to an output shaft of a motor (45) fixed on the top cover (42), and the lower end of the rotating shaft (46) is connected to a guide fan (21) positioned in the air supply chamber (2).
6. The variable air volume adjusting device for the full-automatic biosafety cabinet according to claim 1, characterized in that the air volume adjusting assembly (6) comprises a fixing ring (61), the fixing ring (61) is fixedly connected to the inner wall of the top of the safety cabinet (1), the fixing ring (61) is concentric with the air supply cavity (2) and is sealed with each other, and the inner diameter of the fixing ring (61) is larger than the maximum outer diameters of the air inlet cone (7) and the flow guide column (5);
a plurality of vertically arranged fixing blocking pieces (62) are uniformly distributed on the periphery below the fixing ring (61), adjacent fixing blocking pieces (62) are mutually attached and sealed, and a certain gap is formed between each fixing blocking piece (62) and the outer wall of the flow guide column (5);
every the edge of fixed separation blade (62) below articulates there is movable separation blade (63), and laminates each other between adjacent movable separation blade (63) sealed, just movable separation blade (63) can rotate the outer wall of laminating water conservancy diversion post (5).
7. The variable air volume adjusting device for the full-automatic biosafety cabinet according to claim 6, characterized in that a rotating ring (64) is rotatably sleeved on the outer wall of the fixed ring (61), and a plurality of first universal rods (65) are uniformly distributed in the rotating ring (64) in the circumferential direction;
every rotationally be connected with right angle connecting rod (66) on the surface of fixed separation blade (62), the right angle department of right angle connecting rod (66) rotationally is connected with fixed separation blade (62), the one end of right angle connecting rod (66) is connected to the one end that swivel (64) was kept away from in universal rod one (65), the other end of right angle connecting rod (66) is connected with universal rod two (67), the other end of universal rod two (67) is connected to in the surface of activity separation blade (63).
8. The variable air volume adjusting device for the full-automatic biosafety cabinet according to claim 7, wherein the fixing ring (61) is connected with the rotating ring (64) through a servo cylinder (68), the cylinder body of the servo cylinder (68) is hinged with the fixing ring (61), a cylinder piston rod (681) of the servo cylinder (68) is hinged with a piece of rotating tongue (69), and the other end of the rotating tongue (69) is hinged with the rotating ring (64).
9. The full-automatic variable air volume adjusting device for the biosafety cabinet as claimed in claim 7, wherein the rotating ring (64) is rotatably connected with the fixed ring (61) through a flange (611) sleeved at the bottom of the fixed ring, and a rotating gasket (610) is arranged between the inner wall of the rotating ring (64) and the outer wall of the flange (611).
10. The variable air volume regulating device for the full-automatic biosafety cabinet according to claim 9, wherein a plurality of guide wheels (641) rotatably connected with the fixed ring (61) are distributed on the circumference of the bottom of the fixed ring, the wheel surfaces of the guide wheels (641) are attached to the outer wall of the rotating ring (64), and the rims of the guide wheels (641) are pressed in the bottom surface of the rotating ring (64).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210637882.7A CN114832877B (en) | 2022-06-07 | 2022-06-07 | Variable air volume adjusting device for full-automatic biological safety cabinet |
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| CN202210637882.7A CN114832877B (en) | 2022-06-07 | 2022-06-07 | Variable air volume adjusting device for full-automatic biological safety cabinet |
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| CN114832877B CN114832877B (en) | 2023-05-05 |
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| CN114832877B (en) | 2023-05-05 |
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