Novel nuclear medicine nuclide split charging ventilation cabinet

Abstract

The invention relates to a novel nuclear medicine nuclide split charging ventilation cabinet which comprises a rectangular rack, a mounting platform is fixedly connected to the upper end of the rack, a protective ventilation cabinet is fixedly connected to the mounting platform, a window is formed in the front side of the protective ventilation cabinet, a window frame is fixedly connected to the window, an anti-radiation observation screen is arranged in the window frame, and two operation openings are formed in the anti-radiation observation screen. A protective glove assembly is fixed in the operation opening, an exhaust hole and a material taking hole are formed in the cabinet wall of the right side of the protective ventilation cabinet, and an exhaust fan assembly opposite to the exhaust hole and a taking and placing assembly opposite to the material taking hole are fixedly connected to the ventilation cabinet. The taking and placing assembly comprises a guide pipe fixedly inserted into the material taking hole, a conical flow collecting cover is formed at the left end of the guide pipe, a cylindrical extending cover is formed at the left end of the flow collecting cover, and a material taking pipe is inserted into the guide pipe. According to the ventilation cabinet, a side door opening structure is omitted, a material taking and discharging channel is additionally arranged, and radionuclides can be effectively prevented from flowing into air in a laboratory.

Description

Technical field:

[0001] The invention relates to the technical field of nuclide fume hoods, and more particularly to a novel nuclear medicine nuclide dispensing fume hood. Background technology:

[0002] Nuclide fume hoods are key equipment for handling radionuclides in nuclear medicine. They are mainly used for operations such as packaging, elution and labeling of radioactive drugs to protect operators and the environment from radioactive contamination. Current nuclide fume hoods are mainly used to handle volatile radionuclide drugs, such as Tc-99m, F-18, I-131, etc. These drugs may evaporate when stored in liquid form and enter the human body through the respiratory tract or digestive tract, causing internal radiation hazards. Fume hoods can effectively prevent the leakage and volatilization of radioactive materials through their negative pressure ventilation system, protecting the safety of operators and the surrounding environment. However, the operating space of the existing radionuclide fume hood is relatively large. Although the fan and high-efficiency filter can absorb and filter most of the radionuclide drugs in the air, there will be some dead corners in the fume hood, resulting in a very small amount of radionuclide drugs being retained in the fume hood. The existing fume hood generally adopts an open door structure, that is, a side door is provided. The packaged drugs can be taken out by opening the side door, but a very small amount of radionuclide drugs in the fume hood will enter the laboratory air with the open door, which poses certain hazards. Therefore, in view of the above problems, the radionuclide fume hood needs to be designed to reduce the outflow of radionuclides. Summary of the invention:

[0003] The purpose of the present invention is to address the deficiencies of the prior art and provide a new type of nuclear medicine nuclide packaging fume hood, the fume hood cancels the side door structure, and adds a material taking and discharging channel, the material taking and discharging channel can effectively prevent radioactive nuclides from flowing into the air of the laboratory.

[0004] A novel nuclear medicine nuclide dispensing fume hood comprises a rectangular frame, an upper end of the frame is fixedly connected to a mounting platform, a protective fume hood is fixedly connected to the mounting platform, a window is arranged on the front side of the protective fume hood, a window frame is fixedly connected to the window, a radiation-proof observation screen is arranged in the window frame, two operation ports are formed on the radiation-proof observation screen, a protective glove assembly is fixed in the operation port, an exhaust hole and a material taking hole are respectively formed on the cabinet wall on the right side of the protective fume hood, and an exhaust fan assembly opposite to the exhaust hole and a pick-and-place assembly opposite to the material taking hole are respectively fixedly connected to the fume hood;

[0005] A control filter box is fixedly connected in the frame, and a high-efficiency filter and an ozone generator are arranged in the control filter box. The exhaust fan assembly comprises an air guide tube fixedly connected to the protective fume hood, an axial flow fan is inserted in the left side of the air guide tube, and an exhaust duct is fixedly connected to the right side. One end of the exhaust duct passes through the air guide tube and is fixedly connected to the conical air guide cover, and the air guide cover is plugged and fixed in the air guide tube. The other end of the air duct passes through the control filter box and is fixedly connected to the inlet of the high-efficiency filter. A return pipe is fixedly connected to the outlet of the high-efficiency filter. The end of the return pipe extends out of the control filter box and is fixedly connected to a longitudinal flow divider. The flow divider is plugged and fixed on the mounting platform. The upper part of the flow divider is inserted on the left side of the protective fume hood and is formed with a plurality of longitudinal side ventilation holes, and a plurality of upper ventilation holes are formed on the upper end surface of the flow divider between the side ventilation holes; a discharge pipe is fixedly connected to the return pipe, and a fresh air inlet pipe is fixedly connected to the flow divider;

[0006] The fetching and placing assembly comprises a guide tube inserted and fixed in the material fetching hole, a conical collecting cover is formed at the left end of the guide tube, a cylindrical extension cover is formed at the left end of the collecting cover, a fetching pipe is inserted in the guide tube, the left end of the fetching pipe extends out of the extension cover and is fixed with a conical left protective sealing plate, a material discharge inlet is formed above the left part of the fetching pipe, a plurality of connecting holes are formed on the wall of the fetching pipe at the material discharge inlet, a right protective sealing plate is inserted and fixed in the fetching pipe on the right side of the connecting hole, and the right protective sealing plate is located on the right side of the collecting cover, A longitudinal drainage flat tube is fixedly connected to the rear side of the collecting cover, the front end of the drainage flat tube is connected to the inner cavity of the collecting cover, and the rear end is close to the exhaust hole of the fume hood; a cover plate is fixedly connected to the right end of the material taking pipe, the cover plate is against the right end surface of the guide tube and has a magnetic handle, the front end of the magnetic handle extends out of the cover plate and is formed with a positioning block; a magnetic positioning seat is fixedly connected to the right end surface of the protective fume hood, a positioning socket is formed on the right side of the magnetic positioning seat, the positioning block is inserted into the positioning socket of the magnetic positioning seat and is sucked against the magnetic positioning seat.

[0007] Preferably, electromagnetic butterfly valves are fixedly connected to the return pipe, the discharge pipe and the fresh air inlet pipe, and the outlets of the fresh air inlet pipe and the discharge pipe are both facing backwards.

[0008] Preferably, the protective glove assembly includes a cylindrical seat cover, which is inserted and fixed in the operating port of the radiation protection observation screen, the rear end of the seat cover is located in the protective fume hood and is fixed with lead protective gloves, the front end of the seat cover is buckled with a protective cover, the front end of the protective cover is fixed with a strip-shaped rubber handle, the lower end of the rubber handle is molded with an extension belt, and the end of the extension belt is fixed to the seat cover.

[0009] Preferably, a plurality of horizontal lighting lamps are fixedly connected to the upper bottom surface of the inner side of the protective fume hood; the high efficiency filter adopts a HEPA filter, and the cabinet wall, bottom plate and top plate of the protective fume hood are all made of mm thick lead plates;

[0010] The right end of the air guide tube is screwed with a screw cap, and the screw cap, air guide tube, exhaust pipe, diverter, guide pipe, material taking pipe, left protective sealing plate and right protective sealing plate are all made of lead-containing alloy.

[0011] Preferably, the inner diameter of the guide tube is equal to the outer diameter of the feeding tube, the diameter of the outer ring of the left protective sealing plate is larger than the outer diameter of the feeding tube, and the length of the discharge inlet on the feeding tube is larger than the length of the guide tube.

[0012] Preferably, the communicating holes are evenly distributed in a ring shape around the central axis of the feeding pipe.

[0013] Preferably, the upper ventilation holes and the side ventilation holes on the diverter are linearly and evenly distributed on the diverter, the aperture of the upper ventilation holes is smaller than the aperture of the side ventilation holes, and the number of the side ventilation holes is greater than the number of the upper ventilation holes.

[0014] The beneficial effects of the present invention are:

[0015] The fume hood has eliminated the side door structure and added a material taking and discharging channel. The material taking and discharging channel is based on a fan and a filter, which can effectively purify the air in the material taking and discharging channel. At the same time, the inside and outside of the fume hood can be separated during the material taking and discharging process, which can effectively prevent radioactive nuclides from flowing into the air of the laboratory. Description of the drawings:

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2 It is a partial cross-sectional schematic diagram of the present invention;

[0018] Figure 3 It is a schematic structural diagram of the side view of the present invention;

[0019] Figure 4 It is a front view schematic diagram of the part without radiation protection observation screen of the present invention;

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the part without radiation protection observation screen of the present invention.

[0021] In the figure: 1. Rack; 2. Installation platform; 3. Protective fume hood; 4. Window frame; 5. Protective glove assembly; 6. Exhaust fan assembly; 7. Control filter box; 8. Pick-up and drop assembly; 9. Diverter; 10. Return pipe; 11. Discharge pipe; 12. Fresh air inlet pipe. Specific implementation method:

[0022] Example: See Figures 1 to 5As shown, a novel nuclear medicine nuclide dispensing fume hood comprises a rectangular frame 1, a mounting platform 2 is fixedly connected to the upper end of the frame 1, a protective fume hood 3 is fixedly connected to the mounting platform 2, a window is provided on the front side of the protective fume hood 3, a window frame 4 is fixedly connected to the window, a radiation-proof observation screen 41 is provided in the window frame 4, two operation ports are formed on the radiation-proof observation screen 41, a protective glove assembly 5 is fixed in the operation port, an exhaust hole and a material taking hole are respectively formed on the cabinet wall on the right side of the protective fume hood 3, and an exhaust fan assembly 6 opposite to the exhaust hole and a pick-and-place assembly 8 opposite to the material taking hole are respectively fixedly connected to the fume hood 3;

[0023] The frame 1 is fixedly connected with a control filter box 7, in which a high-efficiency filter and an ozone generator are arranged. The exhaust fan assembly 6 comprises an air guide tube 61 fixedly connected to the protective fume hood 3, an axial flow fan is inserted on the left side of the air guide tube 61, and an exhaust duct 63 is fixedly connected on the right side. One end of the exhaust duct 63 passes through the air guide tube 61 and is fixedly connected to a conical air guide cover, which is plugged and fixed in the air guide tube 61. The other end of the air duct 63 passes through the control filter box 7 and is fixedly connected to the inlet of the high-efficiency filter. The outlet of the high-efficiency filter is fixedly connected with a return pipe 10, the end of the return pipe 10 extends out of the control filter box 7 and is fixedly connected with a longitudinal diverter 9, the diverter 9 is plugged and fixed on the mounting platform 2, the upper part of the diverter 9 is inserted on the left side of the protective fume hood 3 and is formed with a plurality of longitudinal side ventilation holes 91, and a plurality of upper ventilation holes 92 are formed on the upper end surface of the diverter 9 between the side ventilation holes 91; the return pipe 10 is fixedly connected with a discharge pipe 11, and the diverter 9 is fixedly connected with a fresh air inlet pipe 12;

[0024] The pick-up and placement assembly 8 includes a guide tube 81 which is inserted and fixed in the material collection hole, a conical collecting cover 811 is formed at the left end of the guide tube 81, and a cylindrical extension cover 812 is formed at the left end of the collecting cover 811. A material collection tube 82 is inserted in the guide tube 81, and the left end of the material collection tube 82 extends out of the extension cover 812 and is fixedly connected with a conical left protective sealing plate 83. A material discharge inlet 821 is formed on the upper left part of the material collection tube 82, and a plurality of connecting holes 822 are formed on the tube wall of the material collection tube 82 at the material discharge inlet 821. A right protective sealing plate 84 is inserted and fixed in the material collection tube 82 on the right side of the connecting hole 822, and the right protective sealing plate 84 is located on the right side of the collecting cover 811. On the side, a longitudinal drainage flat tube 88 is fixedly connected to the rear side of the collecting cover 811, the front end of the drainage flat tube 88 is connected to the inner cavity of the collecting cover 811, and the rear end is close to the exhaust hole of the fume hood 3; the right end of the material taking pipe 82 is fixedly connected to a cover plate 85, the cover plate 85 is against the right end surface of the guide tube 81 and has a magnetic handle 86, the front end of the magnetic handle 86 extends out of the cover plate 85 and is formed with a positioning plug 861; a magnetic positioning seat 87 is fixedly connected to the right end surface of the protective fume hood 3, and a positioning socket 871 is formed on the right side of the magnetic positioning seat 87, and the positioning plug 861 is inserted into the positioning socket 871 of the magnetic positioning seat 87 and sucked against the magnetic positioning seat 87.

[0025] The return pipe 10, the discharge pipe 11 and the fresh air inlet pipe 12 are fixedly connected with electromagnetic butterfly valves. The outlet of the fresh air inlet pipe 12 and the outlet of the discharge pipe 11 are both facing backwards. The outlet of the fresh air inlet pipe 12 and the outlet of the discharge pipe 11 are facing backwards, which is convenient for installing and connecting ventilation pipelines, and the gas is discharged to the outside of the laboratory and air is taken in from outside the laboratory through the ventilation pipelines.

[0026] The protective glove assembly 5 includes a cylindrical seat cover 51, which is inserted and fixed in the operating port of the radiation protection observation screen 41. The rear end of the seat cover 51 is located in the protective fume hood 3 and is fixed with lead protective gloves. The front end of the seat cover 51 is buckled with a protective cover 52, and the front end of the protective cover 52 is fixed with a strip-shaped rubber handle 53. The lower end of the rubber handle 53 is formed with an extension belt 531, and the end of the extension belt 531 is fixed to the seat cover 51. The seat cover 51 and the protective cover 52 are both made of lead-containing alloy. When the lead protective gloves are not used for operation, the protective cover 52 can be closed to improve the protection effect.

[0027] A plurality of horizontal lighting lamps are fixedly connected to the upper bottom surface of the inner side of the protective fume hood 3; the high efficiency filter adopts a HEPA filter, which is a high efficiency air filter and is a device that can efficiently filter tiny particles in the air. The cabinet wall, bottom plate and top plate of the protective fume hood 3 are all made of 50mm thick lead plate;

[0028] The right end of the air guide tube 61 is screwed with a screw cover 62. The screw cover 62, air guide tube 61, exhaust pipe 63, diverter 9, guide pipe 81, material taking pipe 82, left protective sealing plate 83 and right protective sealing plate 84 are all made of lead-containing alloy. The screw cover 62 is easy to open and close, which is convenient for maintenance and repair of the fan.

[0029] The inner tube diameter of the guide tube 81 is equal to the outer tube diameter of the feeding tube 82, and the diameter of the outer circle of the left protective sealing plate 83 is larger than the outer tube diameter of the feeding tube 82. The left protective sealing plate 83 can prevent the feeding tube 82 from separating from the guide tube 81, and at the same time, the left protective sealing plate 83 can achieve the function of protective isolation; the length of the discharge inlet 821 on the feeding tube 82 is larger than the length of the guide tube 81, so that the discharge inlet 821 on the feeding tube 82 can be moved to the right side of the guide tube 81 to facilitate material collection.

[0030] The connecting holes 822 are evenly distributed in a ring shape around the central axis of the material taking pipe 82 .

[0031] The upper ventilation holes 92 and the side ventilation holes 91 on the diverter 9 are linearly and evenly distributed on the diverter 9, the aperture of the upper ventilation holes 92 is smaller than the aperture of the side ventilation holes 91, and the number of the side ventilation holes 91 is greater than the number of the upper ventilation holes 92; and then the airflow passing through the diverter 9 is mainly output through the side ventilation holes 91, and the side ventilation holes 91 are directed to the bottom of the protective fume hood 3, that is, an operating table is provided in the protective fume hood 3, and the airflow output from the side ventilation holes 91 is directed to the upper surface of the operating platform to achieve effective purification.

[0032] Working principle: This structure is a new type of nuclear medicine nuclide dispensing fume hood. The main technical point of the new type of nuclear medicine nuclide dispensing fume hood is that the side door structure is cancelled and the pick-and-place component 8 is used to replace the side door for dispensing and picking. Secondly, the ventilation and purification system in the fume hood is improved.

[0033] The ventilation purification system process in the fume hood is as follows: first close the exhaust pipe 11 and the fresh air inlet pipe 12, start the axial flow fan in the air guide tube 61, the axial flow fan sucks air from the protective fume hood 3, and the airflow flows from the exhaust pipe 63 into the control filter box 7, and the high-efficiency filter in the control filter box 7 is filtered and adsorbed to the radioactive elements in the air, and at the same time, the ozone generator in the control filter box 7 is turned on, the ozone generator generates ozone, and the ozone enters the return pipe 10 and enters the protective fume hood 3 through the diverter 9. The ozone sterilizes and disinfects the protective fume hood 3, and realizes the internal circulation of the airflow; and the vent setting of the diverter 9 can effectively remove the radioactive elements attached to the operating platform in the fume hood; then after a period of internal circulation, close the return pipe 10, open the exhaust pipe 11 and the fresh air inlet pipe 12, the protective fume hood 3 takes in air from the fresh air inlet pipe 12, and then removes it from the exhaust pipe 11 after filtering, to realize external circulation, which can effectively avoid the presence of radioactive elements in the airflow discharged by the ventilation system;

[0034] In the process of realizing internal circulation and external circulation purification, the packaged medicines are placed in the material taking pipe 2 of the taking and placing assembly 8, and the structure of the material taking pipe 2 can utilize the drainage flat tube 88 to realize the formation of air flow in the material taking pipe 2, and utilize the air flow to purify the material taking pipe 2 and the outer packaging of the packaged medicines, so that when the material taking pipe 2 is moved out of the protective fume hood 3, it will not carry radioactive elements.

[0035] The embodiments are used to illustrate the present invention, but not to limit the present invention. Any person skilled in the art may modify the embodiments without violating the spirit and scope of the present invention, and therefore, the scope of protection of the present invention shall be as set forth in the claims of the present invention.

Claims

1. A novel nuclear medicine nuclide dispensing fume hood, comprising a rectangular frame (1), a mounting platform (2) fixedly connected to the upper end of the frame (1), a protective fume hood (3) fixedly connected to the mounting platform (2), a window provided at the front side of the protective fume hood (3), a window frame (4) fixedly connected to the window, a radiation protection observation screen (41) provided in the window frame (4), two operation ports formed on the radiation protection observation screen (41), a protective glove assembly (5) fixed in the operation port, characterized in that: An exhaust hole and a material taking hole are respectively formed on the cabinet wall on the right side of the protective fume hood (3); an exhaust fan assembly (6) opposite to the exhaust hole and a taking and placing assembly (8) opposite to the material taking hole are respectively fixed to the fume hood (3); The frame (1) is fixedly connected with a control filter box (7), and a high-efficiency filter and an ozone generator are arranged in the control filter box (7). The exhaust fan assembly (6) comprises an air guide tube (61) fixedly connected to the protective fume hood (3), an axial flow fan is inserted on the left side of the air guide tube (61), and an exhaust pipe (63) is fixedly connected on the right side. One end of the exhaust pipe (63) passes through the air guide tube (61) and is fixedly connected to a conical air guide cover, and the air guide cover is inserted and fixed in the air guide tube (61). The other end of the air pipe (63) passes through the control filter box (7) and is fixedly connected to the inlet of the high-efficiency filter. The outlet of the filter is fixedly connected with a return pipe (10), the end of the return pipe (10) extends out of the control filter box (7) and is fixedly connected with a longitudinal diverter (9), the diverter (9) is plugged and fixed on the mounting platform (2), the upper part of the diverter (9) is inserted on the left side of the protective fume hood (3) and is formed with a plurality of longitudinal side ventilation holes (91), and a plurality of upper ventilation holes (92) are formed on the upper end surface of the diverter (9) between the side ventilation holes (91); the return pipe (10) is fixedly connected with a discharge pipe (11), and the diverter (9) is fixedly connected with a fresh air inlet pipe (12); The pick-up and placement assembly (8) comprises a guide tube (81) inserted and fixed in the material picking hole, a conical collecting cover (811) is formed at the left end of the guide tube (81), a cylindrical extension cover (812) is formed at the left end of the collecting cover (811), a material picking tube (82) is inserted in the guide tube (81), the left end of the material picking tube (82) extends out of the extension cover (812) and is fixedly connected with a conical left protective sealing plate (83), a material discharge inlet (821) is formed at the upper left part of the material picking tube (82), a plurality of connecting holes (822) are formed on the tube wall of the material picking tube (82) at the material discharge inlet (821), a right protective sealing plate (84) is inserted and fixed in the material picking tube (82) on the right side of the connecting hole (822), and the right protective sealing plate (84) is located on the right side of the collecting cover (811). On the side, a longitudinal drainage flat tube (88) is fixedly connected to the rear side of the collecting cover (811), the front end of the drainage flat tube (88) is connected to the inner cavity of the collecting cover (811), and the rear end is close to the exhaust hole of the fume hood (3); the right end of the material taking pipe (82) is fixedly connected to a cover plate (85), the cover plate (85) is against the right end surface of the guide tube (81) and has a magnetic handle (86), the front end of the magnetic handle (86) extends out of the cover plate (85) and is formed with a positioning plug (861); the right end surface of the protective fume hood (3) is fixedly connected to a magnetic positioning seat (87), the right side of the magnetic positioning seat (87) is formed with a positioning socket (871), the positioning plug (861) is inserted into the positioning socket (871) of the magnetic positioning seat (87) and is sucked against the magnetic positioning seat (87).

2. A novel nuclear medicine nuclide dispensing fume hood according to claim 1, characterized in that: The return pipe (10), the discharge pipe (11) and the fresh air inlet pipe (12) are fixedly connected with electromagnetic butterfly valves, and the outlet of the fresh air inlet pipe (12) and the outlet of the discharge pipe (11) are both facing backwards.

3. A novel nuclear medicine nuclide dispensing fume hood according to claim 1, characterized in that: The protective glove assembly (5) comprises a cylindrical seat cover (51), the seat cover (51) is inserted and fixed in the operating port of the radiation protection observation screen (41), the rear end of the seat cover (51) is located in the protective fume hood (3) and is fixedly connected to the lead protective gloves, the front end of the seat cover (51) is buckled with a protective cover (52), the front end of the protective cover (52) is fixedly connected to a belt-shaped rubber handle (53), the lower end of the rubber handle (53) is formed with an extension belt (531), and the end of the extension belt (531) is fixedly connected to the seat cover (51).

4. A novel nuclear medicine nuclide dispensing fume hood according to claim 1, characterized in that: A plurality of transverse lighting lamps are fixedly connected to the upper bottom surface of the inner side of the protective fume hood (3); the high efficiency filter is a HEPA filter, and the cabinet wall, bottom plate and top plate of the protective fume hood (3) are all made of 50 mm thick lead plates; The right end of the air guide tube (61) is screwed with a rotary cover (62), and the rotary cover (62), the air guide tube (61), the exhaust pipe (63), the diverter (9), the guide pipe (81), the material taking pipe (82), the left protective sealing plate (83) and the right protective sealing plate (84) are all made of lead-containing alloy.

5. A novel nuclear medicine nuclide dispensing fume hood according to claim 1, characterized in that: The inner diameter of the guide tube (81) is equal to the outer diameter of the feed tube (82), the outer diameter of the left protective sealing plate (83) is larger than the outer diameter of the feed tube (82), and the length of the discharge inlet (821) on the feed tube (82) is larger than the length of the guide tube (81).

6. A novel nuclear medicine nuclide dispensing fume hood according to claim 5, characterized in that: The communicating holes (822) are evenly distributed in a ring shape around the central axis of the material taking pipe (82).

7. A novel nuclear medicine nuclide dispensing fume hood according to claim 1, characterized in that: The upper ventilation holes (92) and the side ventilation holes (91) on the diverter (9) are linearly and evenly distributed on the diverter (9); the aperture of the upper ventilation holes (92) is smaller than the aperture of the side ventilation holes (91); and the number of the side ventilation holes (91) is greater than the number of the upper ventilation holes (92).

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