A nuclear medicine fume hood

Abstract

The present application relates to the technical field of clean fume hoods, and specifically discloses a nuclear medicine fume hood, including a cabinet body, a storage cabinet is arranged at the bottom of the cabinet body, a faucet is arranged in the inner cavity of the cabinet body, a first glass door is fixedly connected to the upper end of the cabinet body, a second glass door is slidably connected to the inner cavity of the upper end of the cabinet body, and a cleaning component is arranged in the inner cavity of the cabinet body. The present invention can clean the operation panel of the fume hood through the cleaning component, and can spray detergent on the operation panel at a fixed point when there are impurities on the operation panel, so as to facilitate the cleaning of the operation panel without wasting detergent. The ventilation component can reduce the noise generated by the exhaust fan, improve a good working environment, and can timely discover when the exhaust fan produces a large amplitude of shaking, so as to facilitate timely maintenance. While increasing the exhaust capacity, it can prevent gas backflow, and can more effectively discharge harmful substances to the outdoors, thereby reducing pollution to the laboratory environment.

Description

Technical Field

[0001] The present application relates to the technical field of clean fume hoods, and in particular to a nuclear medicine fume hood. Background Art

[0002] In nuclear medicine laboratories, nuclear medicine fume hoods, as an important protective equipment, play a key role in protecting experimenters from radioactive contamination and radiation damage. Although the existing nuclear medicine fume hoods can provide protection functions to a certain extent, there are still some limitations. With the continuous development of nuclear medicine technology, the requirements for the performance and degree of automation of fume hoods will continue to increase to meet the higher demands of medical research and clinical applications.

[0003] The existing technology still has the following problems:

[0004] 1. The noise of the existing fume hood exhaust fan is too loud, which will interfere with the concentration of the experimenters, making it difficult for them to concentrate on experimental operations and data analysis, thereby affecting work efficiency. At the same time, when the exhaust fan generates noise, there is a certain friction between the exhaust fan and the equipment, which causes the exhaust fan to shake, resulting in unstable exhaust fan speed and turbulent airflow in the fume hood, which may cause toxic and harmful substances to escape. At the same time, it is difficult to quickly capture the degree of shaking of the exhaust fan, resulting in the inability to perform timely maintenance when the exhaust fan shakes significantly. In addition, the existing fume hood is prone to backflow, which may cause harmful gases to leak into the laboratory, posing a threat to the health and safety of the experimenters. The exhaust equipment with anti-backflow has poor exhaust effect and is difficult to perform high-efficiency exhaust.

[0005] 2. During the experimental operation in the existing fume hood, reagents will inevitably drip onto the operating panel, leaving pollutants or impurities on the operating panel. When the experimenter finishes the experiment and wipes the experimental panel, the reciprocating wiping method is likely to cause secondary contamination to the experimental panel. The use of a large amount of detergent is likely to cause a waste of resources, and it is difficult to clean without detergent. Summary of the invention

[0006] In order to overcome the excessive noise of the exhaust fan of the fume hood, the noise will interfere with the concentration of the experimenters, making it difficult for them to concentrate on experimental operations and data analysis, thereby affecting work efficiency. At the same time, when the exhaust fan generates noise, there is a certain friction between the exhaust fan and the equipment, which causes the exhaust fan to shake, and it is impossible to perform timely maintenance when the exhaust fan shakes greatly. In addition, the existing fume hoods are prone to backflow, which may cause harmful gases to leak into the laboratory, posing a threat to the health and safety of the experimenters. There are pollutants or impurities remaining on the operation panel. When the experimenters complete the experiment and wipe and clean the experimental panel, their reciprocating wiping and cleaning method is likely to cause secondary pollution to the experimental panel. The use of a large amount of detergent is likely to cause waste of resources, and it is difficult to clean without a detergent. The purpose of the present invention is to provide a nuclear medicine fume hood to solve the above-mentioned shortcomings.

[0007] The present application provides a nuclear medicine fume hood, comprising a cabinet body, a storage cabinet is arranged at the bottom end of the cabinet body, a faucet is arranged in the inner cavity of the cabinet body, a first glass door is fixedly connected to the upper end of the cabinet body, a second glass door is slidably connected to the inner cavity of the upper end of the cabinet body, a cleaning component is arranged in the inner cavity of the cabinet body, a ventilation component is arranged at the top end of the cabinet body, a water reservoir is arranged on the outer surface of the cabinet body, a connecting groove is arranged on the outer surface of the cabinet body, the connecting groove and the water reservoir are connected, the second glass door and the first glass door are tightly fitted, a control panel and a socket are arranged on the outer surface of the cabinet body, the ventilation component comprises a ventilation frame, the ventilation frame is fixedly installed in the inner cavity of the top end of the cabinet body, a grille bar is fixedly installed at the bottom end of the ventilation frame, a noise reduction mechanism is arranged in the inner cavity at both ends of the ventilation frame, an alarm mechanism is arranged on the upper surface of the ventilation frame, a second motor is fixedly connected to the middle part of the noise reduction mechanism, an exhaust fan is sleeved on the output end of the second motor, an anti-backflow mechanism is fixedly connected to the inner wall of the top end of the cabinet body, a duct is fixedly sleeved on the inner cavity of the top end of the cabinet body, the top of the anti-backflow mechanism and the duct are fixedly connected, and the anti-backflow mechanism is located in the middle part of the ventilation frame.

[0008] Furthermore, the noise reduction mechanism includes a connecting plate, sliding rods are fixedly installed on the outer surfaces of both sides of the connecting plate, a second spring is sleeved on the outer surface of the sliding rod, a buffer mechanism is arranged at both ends of the connecting plate, the sliding rod and the ventilation frame are slidably connected, the second spring is located between the connecting plate and the ventilation frame, and the second motor is fixedly connected to the middle part of the connecting plate.

[0009] Furthermore, the buffer mechanism includes an elastic frame, a fixed rod is fixedly installed on the outer surface of the elastic frame, the outer surface of the fixed rod is slidably connected to a first slide seat, and there are two first slide seats on one fixed rod, a third spring is sleeved on the middle part of the fixed rod, the inner cavity of the first slide seat is rotatably connected to a connecting strip, the end of the connecting strip away from the first slide seat is rotatably connected to a buffer plate, the third spring is located between the two first slide seats, the elastic frame is fixedly connected to the inner wall of the ventilation frame, and the buffer plate is fixedly connected to the connecting plate.

[0010] Furthermore, the alarm mechanism includes a fixed frame, a speaker is fixedly mounted on the upper surface of the fixed frame, an extrusion rod is fixedly mounted on the lower surface of the fixed frame, an adjusting disk is rotatably connected to the upper surface of the connecting plate, a driving groove is provided in the inner cavity of the adjusting disk, and there are four driving grooves on one adjusting disk, a driving rod is slidably connected to the inner cavity of the driving groove, a second slide is fixedly mounted on the upper surface of the driving rod, and a button is provided on the outer surface of the second slide.

[0011] Furthermore, the fixed frame and the ventilation frame are fixedly connected, the extrusion rod is located in the middle part above the adjusting disk, the upper surface of the connecting plate is provided with a slide groove, the slide groove is cross-distributed, the driving rod and the slide groove are slidably connected, the speaker and the button are electrically connected, and pressing the button controls the speaker to sound an alarm.

[0012] Furthermore, the anti-backflow mechanism includes a ventilation pipe, the inner cavity of the ventilation pipe is provided with a connecting disk, a push rod is fixedly installed on the upper surface of the connecting disk, the inner cavity of the ventilation pipe is provided with a fourth spring, a connecting hole is opened at the bottom end of the connecting disk, the inner cavity of the connecting disk is slidably connected with the ventilation disk, a second fixing strip is fixedly installed on the upper surface of the ventilation disk, the inner cavity of the ventilation disk is fixedly connected with a connecting ring, the middle part of the connecting ring is fixedly connected with a second connecting rod, and a connecting block is fixedly installed on the end of the second connecting rod away from the second connecting rod.

[0013] Furthermore, the top end of the second fixing strip is fixedly connected to the inner wall of the ventilation pipe, the push rod is slidably connected to the inner cavity of the ventilation pipe, the fourth spring is located between the push rod and the inner wall of the ventilation pipe, the bottom end of the connecting plate is fitted with the inner wall of the ventilation pipe, the middle part of the ventilation pipe protrudes outward, the connecting hole and the connecting block are slidably connected, and the connecting hole and the connecting block are fitted when the connecting plate and the ventilation pipe are fitted.

[0014] Furthermore, the cleaning component includes a threaded rod, which is rotatably connected to the inner wall of the cabinet, a first motor is provided in the inner cavity of the cabinet, an output end of the first motor is sleeved on the threaded rod, a movable frame is accommodated in the inner cavity of the cabinet, the movable frame and the threaded rod are threadedly connected, the movable frame and the inner wall of the cabinet are slidably connected, the inner cavity of the movable frame is fixedly connected to a connecting frame, a connecting sleeve is fixedly installed in the inner cavity of the connecting frame, a cleaning rod is movably connected to the inner cavity of the connecting sleeve, the cleaning rod is in close contact with the operating panel of the cabinet, and a spraying mechanism is provided in the inner cavity of the connecting sleeve.

[0015] Furthermore, the spraying mechanism includes an elastic block, which is slidably connected to the connecting sleeve, a first spring is provided on the upper surface of the elastic block, a first connecting rod is fixedly installed on the upper surface of the elastic block, a rack is fixedly installed on the upper surface of the first connecting rod, a first fixed bar is fixedly installed on the upper surface of the movable frame, a gear is rotatably connected to the top of the first fixed bar, a gear rack is slidably connected to the outer surface of the first fixed bar, a pressure rod is fixedly installed on the top bottom wall of the gear rack, and a detergent bottle is fixedly connected to the upper surface of the movable frame.

[0016] Furthermore, the first spring is located between the inner wall of the connecting sleeve and the elastic block, the cleaning rod and the first spring are rotatably connected, the rack and the gear are meshed, the rack and the gear are meshed, the pressure rod and the top of the detergent bottle are in close contact, the first connecting rod and the connecting sleeve are slidably connected, and the first connecting rod is slidably connected to the movable frame and the connecting frame respectively, there is a gap between the top of the rack and the bottom wall of the top of the rack, the detergent bottle stores detergent in the inner cavity, and the detergent is sprayed out when pressed.

[0017] The technical solution provided by this application has at least the following technical effects or advantages:

[0018] 1. The use of a cleaning component effectively solves the problem that during the experimental operation of the existing fume hood, reagents will inevitably drip onto the operating panel, leaving pollutants or impurities on the operating panel. When the experimenter finishes the experiment and wipes the experimental panel, the reciprocating wiping and cleaning method is likely to cause secondary pollution to the experimental panel. The use of a large amount of detergent is likely to cause a waste of resources, and it is difficult to clean without a detergent. The present invention can clean the operating panel of the fume hood through the cleaning component, and when there are impurities on the operating panel, the detergent can be sprayed on a fixed point, which is convenient for cleaning the operating panel without wasting detergent.

[0019] 2. The use of ventilation components effectively solves the problem of excessive noise of the existing fume hood exhaust fan. The noise will interfere with the concentration of the experimenters, making it difficult for them to concentrate on experimental operations and data analysis, thereby affecting work efficiency. At the same time, when the exhaust fan generates noise, there is a certain friction between the exhaust fan and the equipment, which causes the exhaust fan to shake, resulting in unstable exhaust fan speed and turbulent airflow in the fume hood, which may cause toxic and harmful substances to escape. At the same time, it is difficult to quickly capture the degree of shaking of the exhaust fan, resulting in the inability to perform timely maintenance when the exhaust fan produces a large shake. In addition, the existing fume hood is prone to backflow, which may cause harmful gases to leak into the laboratory, posing a threat to the health and safety of the experimenters. The exhaust equipment with anti-backflow has poor exhaust effect and is difficult to perform high-efficiency exhaust. The present invention can reduce the noise generated by the exhaust fan through the ventilation component, improve a good working environment, and can promptly detect when the exhaust fan produces a large amplitude of shaking, which is convenient for timely maintenance. While increasing the exhaust capacity, it can prevent gas backflow, and can more effectively discharge harmful substances to the outdoors, thereby reducing pollution to the laboratory environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure in the embodiment of the present application;

[0021] Figure 2 It is a schematic cross-sectional diagram of the cabinet structure in the embodiment of the present application;

[0022] Figure 3This is a schematic diagram of the cleaning component structure in an embodiment of the present application;

[0023] Figure 4 This is a schematic cross-sectional view of the connecting frame structure in an embodiment of the present application;

[0024] Figure 5 This is a schematic cross-sectional view of the connecting sleeve structure in an embodiment of the present application;

[0025] Figure 6 is a schematic cross-sectional view of the ventilation assembly structure in an embodiment of the present application;

[0026] Figure 7 Schematic diagram of the noise reduction mechanism in the embodiment of the present application;

[0027] Figure 8 Schematic diagram of the structure of the buffer mechanism in the embodiment of the present application;

[0028] Fig. 9 This is a schematic diagram of the structure of the alarm mechanism in the embodiment of the present application;

[0029] Fig.10 Schematic diagram of the driving rod structure in the embodiment of the present application;

[0030] Fig.11 Schematic diagram of the cross-section of the ventilation pipe structure in the embodiment of the present application;

[0031] Fig.12 This is a schematic cross-sectional view of the connection disk structure in an embodiment of the present application;

[0032] Fig.13 Schematic diagram of the connecting hole structure in the embodiment of the present application;

[0033] Fig.14 This is a schematic diagram of the connected block structure in an embodiment of the present application.

[0034] In the figure: 1, cabinet; 2, storage cabinet; 3, faucet; 4, first glass door; 5, second glass door; 6, cleaning assembly; 61, threaded rod; 62, first motor; 63, moving frame; 64, connecting frame; 65, connecting sleeve; 66, cleaning rod; 67, spraying mechanism; 671, elastic block; 672, first spring; 673, first connecting rod; 674, rack; 675, first fixing bar; 676, gear; 677, rack; 678, pressure rod; 679, detergent bottle; 7, ventilation assembly; 71, ventilation frame; 72, grille bar; 73, noise reduction mechanism; 731, connecting plate; 732, sliding rod; 733, second spring; 734, buffer mechanism; 7341, elastic frame; 73 42. fixing rod; 7343. first slide; 7344. third spring; 7345. connecting strip; 7346. buffer plate; 74. alarm mechanism; 741. fixing frame; 742. speaker; 743. extrusion rod; 744. adjustment plate; 745. driving groove; 746. driving rod; 747. second slide; 748. button; 75. second motor; 76. exhaust fan; 77. anti-backflow mechanism; 771. ventilation pipe; 772. connecting plate; 773. push rod; 774. fourth spring; 775. connecting hole; 776. ventilation plate; 777. second fixing strip; 778. connecting ring; 779. second connecting rod; 7710. connecting block; 78. conduit; 8. water reservoir; 9. connecting groove. DETAILED DESCRIPTION

[0035] If there are pollutants or impurities remaining on the operation panel, the present invention can clean the operation panel of the fume hood through a cleaning component; if the exhaust fan shakes and increases noise, the present invention can reduce the noise generated by the exhaust fan through a ventilation component, thereby providing a good working environment.

[0036] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] See also Figure 1 and Figure 2As shown, a nuclear medicine fume hood comprises a cabinet 1, a storage cabinet 2 is arranged at the bottom end of the cabinet 1, a faucet 3 is arranged in the inner cavity of the cabinet 1, a first glass door 4 is fixedly connected to the upper end of the cabinet 1, a second glass door 5 is slidably connected to the inner cavity of the upper end of the cabinet 1, a cleaning component 6 is arranged in the inner cavity of the cabinet 1, and the cleaning component 6 can be stored in the inner cavity of the cabinet 1 when not in use, a ventilation component 7 is arranged at the top of the cabinet 1, a water reservoir 8 is arranged on the outer surface of the cabinet 1, a connecting groove 9 is arranged on the outer surface of the cabinet 1, the connecting groove 9 is connected with the water reservoir 8, when there is liquid in the connecting groove 9, it will flow into the inner cavity of the water reservoir 8 for centralized collection, the second glass door 5 and the first glass door 4 are closely fitted, and a control surface is arranged on the outer surface of the cabinet 1 The cabinet 2 is provided with a plurality of panels and sockets, the storage cabinet 2 is used for storing items, the faucet 3 is used for connecting to an external water source for easy water extraction, the first glass door 4 is used for shielding irritating gases, the second glass door 5 is used for pulling, and when conducting an experiment, the second glass door 5 is pulled to shield the face of the experimenter, that is, the nose, and the bottom end of the second glass door 5 is moved below the nose to prevent the experimenter from smelling the gas generated during the experiment. The cleaning component 6 is used to clean the working panel of the cabinet 1 and is stored in the inner cavity of the cabinet 1 when not in use. The ventilation component 7 is used to discharge the gas generated by the experiment for fixed-point treatment. The water reservoir 8 is used to store water for use during the experiment, and the connecting groove 9 is used to prevent the leakage of the experimental liquid.

[0038] See also Figure 3 and Figure 4As shown, the cleaning assembly 6 includes a threaded rod 61, which is rotatably connected to the inner wall of the cabinet 1, and a first motor 62 is provided in the inner cavity of the cabinet 1. The first motor 62 adopts a stepping motor, and the output end of the first motor 62 is sleeved with the threaded rod 61. The inner cavity of the cabinet 1 accommodates a moving frame 63, and the moving frame 63 and the threaded rod 61 are connected by threads. The moving frame 63 is slidably connected to the inner wall of the cabinet 1, and the inner cavity of the moving frame 63 is fixedly connected to a connecting frame 64, and a connecting sleeve 65 is fixedly installed in the inner cavity of the connecting frame 64. The inner cavity of the connecting sleeve 65 is movably connected to a cleaning rod 66, and the cleaning rod 66 is in close contact with the operation panel of the cabinet 1. The inner cavity of the connecting sleeve 65 is provided with a spraying mechanism 67, which is driven by the operation of the first motor 62 during cleaning. The threaded rod 61 rotates on the inner wall of the cabinet 1, and the rotation of the threaded rod 61 drives the movable frame 63 to slide back and forth on the inner cavity of the threaded rod 61. The movement of the movable frame 63 drives the connecting frame 64 to move, and the movement of the connecting frame 64 drives the connecting sleeve 65 to move. The movement of the connecting sleeve 65 drives the cleaning rod 66 to rotate in the inner cavity of the connecting sleeve 65. The rotation of the cleaning rod 66 can clean the operation panel of the cabinet 1. When encountering impurities or contaminants, the cleaning rod 66 will be driven to lift. At this time, the spraying mechanism 67 will spray detergent at a fixed point. This fixed point refers to the vicinity of the impurities and stains, that is, after the cleaning rod 66 passes by, it causes the spraying mechanism 67 to spray detergent near the impurities on the operation panel, which is convenient for cleaning the operation panel of the cabinet 1, while avoiding waste caused by using detergent over a large area.

[0039] See also Figure 4 and Figure 5As shown, the spraying mechanism 67 includes an elastic block 671, the elastic block 671 and the connecting sleeve 65 are slidably connected, a first spring 672 is provided on the upper surface of the elastic block 671, a first connecting rod 673 is fixedly installed on the upper surface of the elastic block 671, a rack 674 is fixedly installed on the upper surface of the first connecting rod 673, a first fixing bar 675 is fixedly installed on the upper surface of the moving frame 63, a gear 676 is rotatably connected to the top of the first fixing bar 675, a gear rack 677 is slidably connected to the outer surface of the first fixing bar 675, a pressure rod 678 is fixedly installed on the top bottom wall of the gear rack 677, and the upper surface of the moving frame 63 The surface is fixedly connected with a detergent bottle 679, the first spring 672 is located between the inner wall of the connecting sleeve 65 and the elastic block 671, the cleaning rod 66 and the first spring 672 are rotatably connected, the rack 674 and the gear 676 are meshed, the rack 677 and the gear 676 are meshed, the pressure rod 678 and the top of the detergent bottle 679 are in close contact, the first connecting rod 673 and the connecting sleeve 65 are slidably connected, and the first connecting rod 673 is slidably connected to the moving frame 63 and the connecting frame 64 respectively, there is a gap between the top of the rack 674 and the bottom wall of the top of the rack 677, the inner cavity of the detergent bottle 679 stores detergent, and when pressed, detergent is sprayed out. When the cleaning rod 66 encounters impurities that are difficult to clean during rotation, the cleaning rod 66 will be lifted, and the lifting of the cleaning rod 66 drives the elastic block 671, and the lifting of the elastic block 671 drives the first spring 672 to be compressed. At this time, the cleaning rod 66 moves upward in the inner cavity of the connecting sleeve 65 in an instant, and the lifting of the elastic block 671 drives the first connecting rod 673 to move upward in the inner cavity of the connecting sleeve 65. The movement of the first connecting rod 673 drives the rack 674 to move upward, and the movement of the rack 674 drives the gear 676 to rotate in the inner cavity of the first fixing bar 675. The rotation of the first fixing bar 675 drives the rack 677 to rotate in the first fixing bar 675. 75 inner cavity slides downward, the first fixing bar 675 moves downward to drive the pressure rod 678 to move downward, the pressure rod 678 moves downward to press the detergent bottle 679, and the detergent is sprayed out. When the cleaning rod 66 passes through the impurity area on the operation panel of the cabinet 1, the elastic force of the first spring 672 makes the cleaning rod 66 return to its original position to continue cleaning. Therefore, when cleaning the operation panel of the cabinet 1, the detergent is sprayed at a fixed point, that is, when the operation panel has impurities that are difficult to clean and causes the cleaning rod 66 to move upward, the detergent is sprayed, which saves detergent and can also use detergent to clean a place that is difficult to clean.

[0040] See also Figure 2 and Figure 6As shown, the ventilation assembly 7 includes a ventilation frame 71, which is fixedly installed in the top inner cavity of the cabinet 1, and a grille bar 72 is fixedly installed at the bottom end of the ventilation frame 71. The inner cavities at both ends of the ventilation frame 71 are provided with noise reduction mechanisms 73, and the upper surface of the ventilation frame 71 is provided with an alarm mechanism 74. The middle part of the noise reduction mechanism 73 is fixedly connected with a second motor 75, and the second motor 75 adopts a shaded pole motor. The output end of the second motor 75 is sleeved with an exhaust fan 76, and the top inner wall of the cabinet 1 is fixedly connected with an anti-backflow mechanism 77. The top inner cavity of the cabinet 1 is fixedly sleeved with a duct 78, and the top of the anti-backflow mechanism 77 is fixedly connected to the duct 78. The anti-backflow mechanism 77 is located in the middle part of the ventilation frame 71. The exhaust fan 76 is driven to rotate by the second motor 75, so that negative pressure is generated in the ventilation frame 71 area, that is, negative pressure is generated at the top of the cabinet 1, so that the gas generated during the experiment is discharged into the inner cavity of the duct 78. The duct 78 can be connected to an external pipeline so that the generated gas can be concentrated and discharged to a fixed position for treatment. The grille bar 72 is used to guide and distribute the flow of air to ensure that the air flows along a predetermined path and speed, thereby achieving effective ventilation. The noise reduction mechanism 73 is used to reduce the noise generated by the exhaust fan 76 when exhausting air. The alarm mechanism 74 is used to timely detect and maintain when the exhaust fan 76 produces a large amplitude of shaking. The anti-backflow mechanism 77 is used to prevent gas backflow to prevent damage to the experimenter.

[0041] See also Figure 6 , Figure 7 and Figure 8As shown, the noise reduction mechanism 73 includes a connecting plate 731, and sliding rods 732 are fixedly installed on the outer surfaces of both sides of the connecting plate 731. The outer surface of the sliding rod 732 is sleeved with a second spring 733. Buffer mechanisms 734 are provided at both ends of the connecting plate 731. The sliding rod 732 is slidably connected to the ventilation frame 71. The second spring 733 is located between the connecting plate 731 and the ventilation frame 71. The second motor 75 is fixedly connected to the middle part of the connecting plate 731. The buffer mechanism 734 includes an elastic frame 7341. A fixed rod 7342 is fixedly installed on the outer surface of the elastic frame 7341. The outer surface of the fixed rod 7342 is slidably connected There is a first slide seat 7343, and two first slide seats 7343 are on a fixed rod 7342, a third spring 7344 is sleeved on the middle part of the fixed rod 7342, the inner cavity of the first slide seat 7343 is rotatably connected with a connecting strip 7345, and the end of the connecting strip 7345 away from the first slide seat 7343 is rotatably connected with a buffer plate 7346, the third spring 7344 is located between the two first slide seats 7343, the elastic frame 7341 is fixedly connected to the inner wall of the ventilation frame 71, the buffer plate 7346 is fixedly connected to the connecting plate 731, and the noise reduction mechanism 73 and the ventilation frame 71 are connected in a flexible fixed manner. In this way, when the second motor 75 and the exhaust fan 76 generate shaking, the noise is reduced. When the second motor 75 works and drives the connecting plate 731 to shake, the shaking of the connecting plate 731 drives the sliding bar 732 to slide in the inner cavity of the ventilation frame 71. At this time, the elastic force of the second spring 733 restores the connecting plate 731 to its original position, reducing the shaking amplitude. At the same time, in the direction perpendicular to the sliding bar 732, the elastic force of the buffer mechanism 734 reduces the shaking amplitude of the connecting plate 731. Reducing the shaking amplitude can reduce the probability of the occurrence of this resonance phenomenon, thereby reducing the generation of noise. When the connecting plate 731 moves toward one of the buffer mechanisms 734, the vibration of the connecting plate 731 is reduced. When the lever 7342 moves in the opposite direction, the buffer plate 7346 at one end is squeezed to drive the connecting bar 7345 to rotate. The rotation of the connecting bar 7345 drives the first slide 7343 to slide on the fixed rod 7342. The sliding of the first slide 7343 drives the first slide 7343 to squeeze the third spring 7344. The elastic force of the third spring 7344 makes the first slide 7343 return to its original position. The pulling force of the buffer plate 7346 at the other end reduces the shaking amplitude of the connecting plate 731, thereby reducing the noise of the exhaust fan 76 during exhaust, allowing the experimenters to maintain a good working environment and facilitating improving work efficiency.

[0042] See also Figure 6 , Fig. 9 and Fig.10As shown, the alarm mechanism 74 includes a fixing frame 741, a speaker 742 is fixedly installed on the upper surface of the fixing frame 741, a pressing rod 743 is fixedly installed on the lower surface of the fixing frame 741, an adjusting disk 744 is rotatably connected to the upper surface of the connecting plate 731, a driving groove 745 is opened in the inner cavity of the adjusting disk 744, and there are four driving grooves 745 on one adjusting disk 744, a driving rod 746 is slidably connected to the inner cavity of the driving groove 745, and a second slide seat 747 is fixedly installed on the upper surface of the driving rod 746 The outer surface of the second slide 747 is provided with a button 748, the fixing frame 741 and the ventilation frame 71 are fixedly connected, the extrusion rod 743 is located in the middle part above the adjustment disk 744, the upper surface of the connecting plate 731 is provided with a slide groove, the slide groove is cross-distributed, the driving rod 746 is slidably connected to the slide groove, the speaker 742 and the button 748 are electrically connected, the pressing of the button 748 controls the speaker 742 to sound an alarm, and when the connecting plate 731 shakes, the adjustment disk 744 is driven to shake, and the shaking of the adjustment disk 744 drives When the button 748 and the extrusion rod 743 are in contact, the button 748 controls the speaker 742 to sound an alarm, reminding the staff that the button 748 and the extrusion rod 743 are in contact and timely maintenance is required. In actual use, the alarm distance is set by adjusting the distance between the button 748 and the extrusion rod 743, and the driving groove 745 is driven to rotate by rotating the adjustment disk 744. The driving groove 745 drives the driving rod 746 to slide in the inner cavity of the driving groove 745, so that the driving rod 746 slides in the sliding groove on the connecting plate 731. At this time, the distance between the second slide seat 747 changes, thereby driving the distance between the button 748 and the extrusion rod 743 to change. When the shaking amplitude of the connecting plate 731 reaches the set distance, the extrusion rod 743 contacts the button 748 and sounds an alarm, so that when the exhaust fan 76 is used for a long time, it can be quickly discovered when a large shaking occurs, so as to carry out timely maintenance.

[0043] See also Fig.11 , Fig.12 , Fig.13 and Fig.14As shown, the backflow prevention mechanism 77 includes a ventilation pipe 771, the inner cavity of the ventilation pipe 771 is provided with a connecting disk 772, the upper surface of the connecting disk 772 is fixedly mounted with a push rod 773, the inner cavity of the ventilation pipe 771 is provided with a fourth spring 774, the bottom end of the connecting disk 772 is provided with a connecting hole 775, the inner cavity of the connecting disk 772 is slidably connected with a ventilation disk 776, the upper surface of the ventilation disk 776 is fixedly mounted with a second fixing strip 777, the inner cavity of the ventilation disk 776 is fixedly connected with a connecting ring 778, the middle part of the connecting ring 778 is fixedly connected with a second connecting rod 779, and the second connecting rod 779 is away from one end of the second connecting rod 779. A connecting block 7710 is fixedly installed, the top of the second fixing strip 777 is fixedly connected to the inner wall of the ventilation pipe 771, the push rod 773 is slidably connected to the inner cavity of the ventilation pipe 771, the fourth spring 774 is located between the push rod 773 and the inner wall of the ventilation pipe 771, the bottom end of the connecting plate 772 is fitted with the inner wall of the ventilation pipe 771, the middle part of the ventilation pipe 771 bulges outward, the connecting hole 775 is slidably connected to the connecting block 7710, and when the connecting plate 772 is fitted with the ventilation pipe 771, the connecting hole 775 is fitted with the connecting block 7710. When the inner cavity at the top of the cabinet 1 generates negative pressure, the connecting plate 772 is driven to move upward. At this time, the push rod 773 is in the ventilation pipe 7 The inner cavity of the cabinet 771 slides, and the connecting plate 772 slides on the ventilation plate 776, so that a gap is generated between the ventilation pipe 771 and the connecting plate 772 to facilitate the exhaust of wind. The middle part of the ventilation pipe 771 bulges outward to facilitate smooth ventilation. At the same time, when the connecting plate 772 moves upward, the connecting hole 775 and the connecting block 7710 are separated from each other, and the wind can pass through the connecting ring 778 from the inner cavity of the connecting hole 775, thereby increasing the overall exhaust channel and enhancing the exhaust capacity of the cabinet 1. In particular, when a large amount of harmful gases and particulate matter is processed, by increasing the exhaust path, the cabinet 1 can more effectively exhaust harmful substances outdoors, thereby reducing the impact on the laboratory environment. Pollution, improve exhaust efficiency, make the airflow generated by the cabinet 1 during the experiment flow stably and orderly, so as to effectively exhaust and control harmful gases, avoid the spread of harmful gases in the cabinet 1, and reduce the risk of contamination in the laboratory. When the exhaust is stopped, the elastic force of the fourth spring 774 makes the connecting plate 772 closely contact with the inner wall of the ventilation pipe 771 again, and at the same time, the connecting hole 775 and the connecting block 7710 fit closely, so that the lower surface of the connecting plate 772 and the lower surface of the connecting block 7710 form a whole, preventing the gas backflow of the duct 78, while increasing the exhaust capacity, it can prevent the gas backflow, and prevent the exhaust gas from backflowing and causing harm to the experimenter.

[0044] In summary, the storage cabinet 2 is used to store items, the faucet 3 is used to connect to an external water source for easy water extraction, the first glass door 4 is used to block irritating gases, and the second glass door 5 is used for pulling. When conducting an experiment, the second glass door 5 is pulled to block the face of the experimenter, that is, the nose, and the bottom end of the second glass door 5 is moved below the nose to prevent the experimenter from smelling the gas generated during the experiment. The cleaning component 6 is used to clean the working panel of the cabinet 1 and is stored in the inner cavity of the cabinet 1 when not in use. The ventilation component 7 is used to discharge the gas generated by the experiment for fixed-point treatment. The water reservoir 8 is used to store water for use during experiments. The connecting groove 9 is used to prevent the experimental liquid from leaking. When cleaning, the first motor 62 drives the threaded rod 61 to rotate on the inner wall of the cabinet 1. The rotation of the threaded rod 61 drives the moving frame 63 to slide back and forth on the inner cavity of the threaded rod 61. At this time, the cleaning rod 66 rotates in the inner cavity of the connecting sleeve 65. The cleaning rod 66 The rotation of the cabinet 1 can clean the operation panel of the cabinet 1. When encountering impurities or contaminants, the cleaning rod 66 will be driven to lift. At this time, the spraying mechanism 67 will spray detergent at a fixed point, which is convenient for cleaning the operation panel of the cabinet 1, while avoiding the waste caused by the use of detergent over a large area. The exhaust fan 76 is driven to rotate by the operation of the second motor 75, so that a negative pressure is generated in the ventilation frame 71 area, that is, a negative pressure is generated at the top of the cabinet 1, which is convenient for discharging the gas generated during the experiment into the inner cavity of the duct 78. The duct 78 can be connected to an external pipeline so that the generated gas is concentrated and discharged to a fixed position for treatment. The grille bars 72 are used to guide and distribute the flow of air to ensure that the air flows along a predetermined path and speed, thereby achieving effective ventilation. The noise reduction mechanism 73 is used to reduce the noise generated by the exhaust fan 76 when exhausting air. The alarm mechanism 74 is used to timely detect and maintain when the exhaust fan 76 shakes significantly. The anti-backflow mechanism 77 is used to prevent gas backflow to prevent damage to the experimenter.

[0045] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0046] What has been described above is only a preferred specific implementation manner of the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A nuclear medicine fume hood, comprising a hood body (1), characterized in that: The cabinet (1) has a storage cabinet (2) at the bottom end thereof, a faucet (3) in the inner cavity of the cabinet (1), a first glass door (4) fixedly connected to the upper end of the cabinet (1), a second glass door (5) slidably connected to the inner cavity of the upper end of the cabinet (1), a cleaning assembly (6) in the inner cavity of the cabinet (1), a ventilation assembly (7) at the top end of the cabinet (1), a water reservoir (8) on the outer surface of the cabinet (1), a connecting groove (9) in communication with the water reservoir (8), the second glass door (5) and the first glass door (4) tightly fitted, and a control panel and a socket on the outer surface of the cabinet (1); The ventilation assembly (7) comprises a ventilation rack (71), the ventilation rack (71) being fixedly mounted on the top inner cavity of the cabinet (1), a grille bar (72) being fixedly mounted on the bottom end of the ventilation rack (71), noise reduction mechanisms (73) being arranged at the inner cavities at both ends of the ventilation rack (71), an alarm mechanism (74) being arranged on the upper surface of the ventilation rack (71), a second motor (75) being fixedly connected to the middle portion of the noise reduction mechanism (73), an exhaust fan (76) being sleeved at the output end of the second motor (75), a backflow prevention mechanism (77) being fixedly connected to the top inner wall of the cabinet (1), a duct (78) being fixedly sleeved to the top inner cavity of the cabinet (1), a top end of the backflow prevention mechanism (77) being fixedly connected to the duct (78), and the backflow prevention mechanism (77) being located at the middle portion of the ventilation rack (71); The noise reduction mechanism (73) comprises a connecting plate (731), sliding rods (732) are fixedly mounted on the outer surfaces of both sides of the connecting plate (731), the outer surfaces of the sliding rods (732) are sleeved with second springs (733), buffer mechanisms (734) are arranged at both ends of the connecting plate (731), the sliding rods (732) and the ventilation frame (71) are slidably connected, the second spring (733) is located between the connecting plate (731) and the ventilation frame (71), and the second motor (75) is fixedly connected to the middle part of the connecting plate (731); The buffer mechanism (734) comprises an elastic frame (7341), a fixed rod (7342) is fixedly mounted on the outer surface of the elastic frame (7341), a first slide seat (7343) is slidably connected to the outer surface of the fixed rod (7342), and two first slide seats (7343) are arranged on one fixed rod (7342), a third spring (7344) is sleeved on the middle part of the fixed rod (7342), a connecting strip (7345) is rotatably connected to the inner cavity of the first slide seat (7343), an end of the connecting strip (7345) away from the first slide seat (7343) is rotatably connected to a buffer plate (7346), the third spring (7344) is located between the two first slide seats (7343), the elastic frame (7341) is fixedly connected to the inner wall of the ventilation frame (71), and the buffer plate (7346) is fixedly connected to the connecting plate (731); The alarm mechanism (74) comprises a fixing frame (741), a speaker (742) is fixedly mounted on the upper surface of the fixing frame (741), an extrusion rod (743) is fixedly mounted on the lower surface of the fixing frame (741), an adjustment disk (744) is rotatably connected to the upper surface of the connecting plate (731), a driving groove (745) is provided in the inner cavity of the adjustment disk (744), and one adjustment disk (744) has four driving grooves (745), a driving rod (746) is slidably connected to the inner cavity of the driving groove (745), a second slide seat (747) is fixedly mounted on the upper surface of the driving rod (746), and a button (748) is provided on the outer surface of the second slide seat (747); The fixing frame (741) and the ventilation frame (71) are fixedly connected, the squeezing rod (743) is located in the middle part above the adjusting plate (744), the upper surface of the connecting plate (731) is provided with a slide groove, the slide groove is arranged in a cross shape, the driving rod (746) and the slide groove are slidably connected, the speaker (742) and the button (748) are electrically connected, and pressing the button (748) controls the speaker (742) to sound an alarm.

2. A nuclear medicine fume hood according to claim 1, characterized in that: The anti-backflow mechanism (77) includes a ventilation pipe (771), the inner cavity of the ventilation pipe (771) is provided with a connecting disk (772), the upper surface of the connecting disk (772) is fixedly mounted with a push rod (773), the inner cavity of the ventilation pipe (771) is provided with a fourth spring (774), the bottom end of the connecting disk (772) is provided with a connecting hole (775), the inner cavity of the connecting disk (772) is slidably connected with a ventilation disk (776), the upper surface of the ventilation disk (776) is fixedly mounted with a second fixing strip (777), the inner cavity of the ventilation disk (776) is fixedly connected with a connecting ring (778), the middle portion of the connecting ring (778) is fixedly connected with a second connecting rod (779), and a connecting block (7710) is fixedly mounted on one end of the second connecting rod (779) away from the second connecting rod (779).

3. A nuclear medicine fume hood as claimed in claim 2, characterized in that: The top end of the second fixing strip (777) is fixedly connected to the inner wall of the ventilation pipe (771), the push rod (773) is slidably connected to the inner cavity of the ventilation pipe (771), the fourth spring (774) is located between the push rod (773) and the inner wall of the ventilation pipe (771), the bottom end of the connecting plate (772) is in contact with the inner wall of the ventilation pipe (771), the middle part of the ventilation pipe (771) protrudes outward, the connecting hole (775) and the connecting block (7710) are slidably connected, and when the connecting plate (772) and the ventilation pipe (771) are in contact, the connecting hole (775) and the connecting block (7710) are in contact.

4. A nuclear medicine fume hood according to claim 1, characterized in that: The cleaning assembly (6) comprises a threaded rod (61), the threaded rod (61) being rotatably connected to the inner wall of the cabinet (1), the inner cavity of the cabinet (1) being provided with a first motor (62), the output end of the first motor (62) being sleeved with the threaded rod (61), the inner cavity of the cabinet (1) housing a moving frame (63), the moving frame (63) being threadably connected to the threaded rod (61), the moving frame (63) being slidably connected to the inner wall of the cabinet (1), the inner cavity of the moving frame (63) being fixedly connected to a connecting frame (64), the inner cavity of the connecting frame (64) being fixedly mounted with a connecting sleeve (65), the inner cavity of the connecting sleeve (65) being movably connected with a cleaning rod (66), the cleaning rod (66) being in close contact with an operation panel of the cabinet (1), and the inner cavity of the connecting sleeve (65) being provided with a spraying mechanism (67).

5. A nuclear medicine fume hood as claimed in claim 4, characterized in that: The spraying mechanism (67) comprises an elastic block (671), wherein the elastic block (671) and the connecting sleeve (65) are slidably connected, a first spring (672) is arranged on the upper surface of the elastic block (671), a first connecting rod (673) is fixedly mounted on the upper surface of the elastic block (671), a rack (674) is fixedly mounted on the upper surface of the first connecting rod (673), a first fixing bar (675) is fixedly mounted on the upper surface of the movable frame (63), a gear (676) is rotatably connected to the top end of the first fixing bar (675), a gear rack (677) is slidably connected to the outer surface of the first fixing bar (675), a pressure rod (678) is fixedly mounted on the top and bottom wall of the gear rack (677), and a detergent bottle (679) is fixedly mounted on the upper surface of the movable frame (63).

6. A nuclear medicine fume hood as claimed in claim 5, characterized in that: The first spring (672) is located between the inner wall of the connecting sleeve (65) and the elastic block (671), the cleaning rod (66) and the first spring (672) are rotatably connected, the rack (674) and the gear (676) are meshed, the rack (677) and the gear (676) are meshed, the pressure rod (678) and the top end of the detergent bottle (679) are in close contact, the first connecting rod (673) and the connecting sleeve (65) are slidably connected, and the first connecting rod (673) is slidably connected to the movable frame (63) and the connecting frame (64), respectively, there is a gap between the top end of the rack (674) and the bottom wall of the top end of the rack (677), the inner cavity of the detergent bottle (679) stores detergent, and the detergent is sprayed out when pressed.

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