A marine grade fume hood

Abstract

The application provides a marine-grade fume hood, and relates to the technical field of marine experimental equipment, which comprises a cabinet body, the cabinet body comprises side plates, a table plate, a back plate and a top plate, a suction hood is installed on the top plate, a glass window is connected between the table plate and the top plate, a stand is arranged on one side of the two side plates, the glass window is vertically and slidingly installed on the stand, a lifting shaft is connected between the two side plates and is arranged perpendicularly and horizontally, a winch is installed at the two ends of the lifting shaft, a steel wire rope is connected to the upper end of the two sides of the glass window, one end of the steel wire rope away from the glass window is wound on the corresponding winch, one end of the lifting shaft is connected with a lifting motor, a manual switch and a foot switch for controlling the opening and closing of the lifting motor are installed on the stand, a first fixing part for fixing the glass window is installed on the top plate, a second fixing part for fixing the bottom of the glass window is installed on the table plate, and a fixing assembly for fixing experimental instruments is further installed on the table plate. The application can keep the stability of the experimental instruments and the glass window under the condition of ship pitching.

Description

Technical Field

[0001] This invention relates to the field of marine experimental equipment technology, and in particular to a marine-grade fume hood. Background Technology

[0002] Fume hoods are commonly used ventilation equipment in laboratories, primarily to prevent the leakage of harmful gases generated during experiments from harming laboratory personnel. A liftable glass window is installed on the front of the fume hood. During experiments, the glass window remains closed to maintain the fume hood's seal. Currently, the glass window of fume hoods is typically controlled by a counterweight connected to a synchronous belt.

[0003] However, when fume hoods are used on ships, the constant rolling and pitching of the vessel due to sea conditions can cause the glass window or counterweight to move automatically, affecting the fume hood's performance and lifespan. Furthermore, laboratory equipment placed directly inside the fume hood can also move or tip over due to the ship's movement, disrupting experiments. Therefore, a marine-grade fume hood needs to be designed to meet the experimental requirements on board ships, maintaining the stability of laboratory equipment and the glass window even under rough seas, preventing leaks during experiments, and avoiding the movement or tipping of equipment that could disrupt the experiment. Summary of the Invention

[0004] The purpose of this invention is to provide a marine-grade fume hood that can maintain the stability of experimental instruments and glass windows under ship turbulence, prevent leakage of the fume hood during experiments, and prevent the movement or tipping of experimental instruments from affecting the experiment, thus meeting the experimental needs on ships.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0006] A marine-grade fume hood includes a cabinet body, the cabinet body including two vertically arranged side panels, and a horizontally arranged platform connecting the two side panels. The platform and the two side panels form an H-shaped structure, and the bottom of the two side panels are fixedly installed on the ship. A vertically arranged back panel and a top panel parallel to the platform are connected between the two side panels. The top panel is located above the platform, and its side near the back panel is connected to the upper end of the back panel. An air suction hood is installed on the top panel.

[0007] The side of the platform near the back panel is connected to the lower end of the back panel. A glass window located on the opposite side of the back panel is connected between the platform and the top panel. The height of the glass window is greater than the vertical distance between the platform and the top panel. The two side panels are provided with vertically arranged columns on both sides of the glass window on the side away from the back panel. The glass window is vertically slidably mounted on the columns.

[0008] A lifting shaft, perpendicular and horizontally arranged, is connected between the two side panels. The lifting shaft is located above the top panel and is rotatably mounted on the side panels around its axis. Winches are installed at both ends of the lifting shaft and are coaxially arranged with it. Steel wire ropes are connected to the upper ends of both sides of the glass window, and the ends of the steel wire ropes away from the glass window are wound around the corresponding winches. A lifting motor that drives the lifting shaft to rotate is connected to one end of the lifting shaft. A manual switch and a foot switch for controlling the opening and closing of the lifting motor are installed on one of the columns. The manual switch is located above the platform, and the foot switch is located at the bottom of the column.

[0009] The top plate is equipped with a first fixing component for fixing the glass window, the platform is equipped with a second fixing component for fixing the bottom of the glass window, and the platform is also equipped with a fixing component for fixing experimental instruments.

[0010] By adopting the above technical solution, the experimental instruments are fixed to the platform using a fixing component. When the fume hood is working, the bottom of the viewing window is fixed using a second fixing component, and harmful gases are sucked away through the suction hood. When it is necessary to move the glass viewing window to open the fume hood, the lifting motor is activated by a manual switch or foot switch. The lifting motor drives the lifting shaft to rotate the winch and wind up the steel wire rope, pulling the glass viewing window upwards to its position. Then, the lifting motor is turned off by a manual switch or foot switch, and the position of the glass viewing window is fixed using the first fixing component.

[0011] In this application, the bottom of the side plate is fixed to the ship, and the glass window is driven to rise and fall using a lifting motor, lifting shaft, winch, and steel wire rope. The glass window is fixed using a first and second fixing component, and the experimental instruments are fixed using a fixing assembly. In this way, when the ship is tossed and turned by wind and waves, the fume hood as a whole will not move or even tip over, the glass window will not move up and down on its own, and the experimental instruments will not move, tip over, or even collide with the fume hood inside the fume hood. That is, the fume hood, experimental instruments, and glass window are kept stable under the condition of ship turbulence, avoiding leakage of the fume hood during the experiment, and preventing the experimental instruments from moving or tipping over and affecting the experiment, thus meeting the experimental use requirements on the ship.

[0012] Furthermore, since the fume hood eliminates the need for a counterweight, it also avoids the possibility of the counterweight damaging the fume hood due to the turbulence and movement of waves. In addition, the two side panels are a single, integral structure, and are supported and fixed together by a back panel, top panel, and platform, forming an H-shaped structure with the bottom of the side panels fixed to the ship. Compared to the segmented structure of existing technologies, the fume hood has higher overall stability.

[0013] Furthermore, the first fixing component includes a suction cup with its axis perpendicular to the back plate and horizontally arranged, the opening of the suction cup facing the side of the glass window near the back plate; the suction cup is connected to a vacuum machine mounted on the top plate through an adsorption tube, and a sliding rod arranged along its axis is also connected to the side of the suction cup away from the glass window, the sliding rod is slidably mounted on the top plate along its length, and the adsorption switch of the vacuum machine is set on the column; a linkage mechanism is provided between the sliding rod and the lifting shaft, and when the lifting shaft rotates to wind up the steel wire rope, the linkage mechanism drives the sliding rod to slide towards the glass window.

[0014] By adopting the above technical solution, when the lifting shaft rotates and rewinds the steel wire rope, causing the glass window to rise and open, the linkage mechanism drives the sliding rod to move closer to the glass window, causing the suction cup to adhere to the glass window. Once the glass window is fully open, the lifting shaft stops rotating, and the vacuum machine is activated via the suction switch. The vacuum machine creates a vacuum on the suction cup through the suction tube, causing the suction cup to adhere and fix to the surface of the glass window, thus fixing the position of the glass window. This prevents the glass window from repeatedly moving upwards and resetting when the ship is rocking, ensuring the stability of the glass window and extending its service life.

[0015] Furthermore, the linkage mechanism includes a linkage seat disposed on the top plate and located between the lifting shaft and the glass window. A linkage plate is vertically slidably mounted on the linkage seat. An inclined support rod is provided on the side of the linkage seat near the lifting shaft. The support rod is located on the side of the linkage plate near the linkage seat, with its upper end away from the linkage plate. The lower end of the support rod is connected to a vertically mounted support seat. The connection between the support rod and the support seat is rotatably mounted on the linkage seat, with its rotation axis parallel to the axis of the lifting shaft and located on the side of the support rod away from the linkage plate. A support block is provided on the bottom side of the support seat away from its rotation axis. A linkage protrusion that cooperates with the support block is provided at the bottom of the linkage plate near the support block. The upper end face of the linkage protrusion is provided with a first wedge surface that is inclined downwards, and the lower end face of the support block is provided with a second wedge surface that cooperates with the first wedge surface.

[0016] The top plate is provided with a sliding groove along the length of the sliding rod. The sliding rod is slidably installed in the sliding groove. The bottom of the linkage plate and the end of the sliding rod away from the suction cup are provided with mutually cooperating linkage wedge surfaces. In normal condition, the bottom of the linkage protrusion rests on the upper surface of the support block, the linkage plate is located above the sliding groove, and the linkage wedge surface at the bottom of the linkage plate is located directly above the linkage wedge surface at the end of the sliding rod.

[0017] A linkage disc coaxial with the lifting shaft is installed on the lifting shaft. A linkage rod is provided on the outer wall of the linkage disc along its radial direction. A linkage support rod is hinged to the end of the linkage rod away from the linkage disc. The hinge axis of the linkage support rod is located at the end closest to the linkage rod and is parallel to the lifting shaft. Under normal conditions, the linkage support rod is always collinear with the linkage rod, and the hinge axis of the linkage support rod is always located on the outer side of the support rod away from the linkage plate. When the lifting shaft rotates to wind up the wire rope, the linkage rod drives the linkage support rod to push the support rod from below to the top, so that the support rod drives the support block to rotate and disengage from the linkage protrusion. When the lifting shaft rotates to release the wire rope, the linkage support rod is pushed by the support rod from above the support rod to rotate around its hinge axis.

[0018] By adopting the above technical solution, under normal conditions, the bottom of the linkage plate is located above the sliding rod, and the bottom of the linkage protrusion rests on the upper surface of the support block. When the lifting shaft rotates and drives the winch to wind up the wire rope, the lifting shaft drives the linkage plate to rotate synchronously. During the rotation of the linkage plate, the linkage rod and linkage support rod rotate. The linkage support rod pushes the support rod from below, and the support rod drives the support block to rotate through the support seat, causing the support block to detach from below the linkage protrusion. After the linkage protrusion loses the support of the support block, the linkage plate automatically falls downward under its own gravity. With the cooperation of the linkage wedge surface at the bottom of the linkage plate and the linkage wedge surface at the end of the sliding rod, the sliding rod drives the suction cup to slide towards the glass window during the downward sliding of the linkage plate, so that the suction cup fits against the glass window. Under the limiting effect of the linkage plate, the sliding rod prevents the suction cup from automatically sliding away from the glass window. When the lifting shaft stops rotating, the vacuum machine is started by the suction switch, so that the suction cup is attached to the glass window and fixed, thus fixing the position of the glass window and preventing the glass window from shaking up and down when the ship is rocking.

[0019] When the lifting shaft rotates to release the wire rope, the linkage rod contacts the support rod from above, causing the support rod to tend to rotate downwards. This means the support seat tends to rotate closer to the side wall of the linkage plate. However, due to the limiting effect of the linkage plate on the support seat, the support rod cannot rotate. Then, under the reaction force of the support rod, the linkage rod is pushed by the support rod to rotate upwards around its axis until the linkage rod drives the linkage rod to pass around the support rod. The linkage rod then automatically resets. This process repeats to avoid interference between the linkage rod and the support rod when the lifting shaft rotates to release the wire rope, which would affect the normal rotation of the lifting shaft.

[0020] Furthermore, a transmission gear coaxial with the lifting shaft is installed on the lifting shaft, and a reset wheel with its axis parallel to the lifting shaft and located above the lifting shaft is rotatably mounted on the top plate. A reset gear coaxial with the reset wheel and meshing with the transmission gear is installed on the reset wheel. A reset rod arranged radially along the outer wall of the reset wheel and located on one side of the reset gear is installed. The reset rod and the linkage rod are offset. A reset support rod with its rotation axis parallel to the axis of the reset wheel is hinged to the end of the reset rod away from the reset wheel. The rotation axis of the reset support rod is located at its end near the reset rod, and the reset support rod and the reset rod are always collinear in normal operation. A reset protrusion located on the same side as the linkage protrusion is provided on the upper end of the linkage plate near the lifting shaft. The reset support rod cooperates with the reset protrusion.

[0021] When the lifting shaft rotates to wind up the wire rope, the reset rod drives the reset support rod to rotate downward from above the reset protrusion, and the reset support rod is pushed by the reset protrusion from above the reset protrusion to rotate around its hinge axis.

[0022] The reset rod near the reset support rod is also provided with a limiting block that cooperates with the reset support rod and is perpendicular to the rotation axis of the reset support rod. When the lifting shaft rotates to release the wire rope, the reset rod drives the reset support rod to rotate upward from below the reset protrusion. Under the action of the limiting block, the reset support rod cannot rotate and lifts the linkage plate upward as a whole through the reset protrusion. Under the cooperation of the first wedge surface and the second wedge surface, the linkage protrusion drives the support rod to rotate through the support block until the linkage protrusion moves up to above the support block and rests on the support block.

[0023] By adopting the above technical solution, the meshing action of the transmission gear and the reset gear enables the reset wheel to rotate synchronously with the lifting shaft, and the rotation direction of the reset wheel is opposite to that of the lifting shaft. When the lifting shaft rotates, driving the winch to rotate and wind up the wire rope, the reset wheel drives the reset rod and reset support rod to rotate downwards from above the reset protrusion. The reset support rod is pushed by the reset protrusion from above the reset protrusion to rotate around its hinge axis until the reset support rod and reset rod pass over the reset protrusion, at which point the reset support rod returns to its original position, thus avoiding interference between the reset support rod and the reset protrusion. When the lifting shaft rotates, driving the winch to loosen the wire rope, the reset wheel drives the reset rod and reset support rod to rotate upward from below the reset protrusion. Under the limiting action of the limit block, the reset support rod cannot rotate downward, thus allowing the reset support rod to push the reset protrusion upward from below, lifting the linkage plate vertically upward. During the upward movement of the linkage plate, the cooperation between the first wedge surface above the linkage protrusion and the second wedge surface below the support block causes the support block to rotate away from the linkage plate to make way for the linkage protrusion. Until the linkage protrusion moves above the support block, the support rod drives the support block to automatically rotate and reset. The bottom of the linkage protrusion rests on the upper surface of the support block, and the reset support rod disengages from the reset protrusion, realizing the upward reset of the linkage plate and releasing the limiting action on the sliding rod, so that the sliding rod can drive the suction cup to reset.

[0024] Furthermore, a first magnetic block is embedded at the bottom of the linkage plate, and a second magnetic block is embedded in the sliding groove, located directly below the linkage plate and cooperating with the first magnetic block; the side wall of the sliding groove is provided with a reset groove that is arranged along its length and communicates with it, and the side wall of the sliding rod is provided with a sliding block that is slidably installed in the reset groove. A reset spring is connected between the side of the sliding block away from the glass window and the end of the reset groove that is close to it, and the reset spring is located in the reset groove and arranged along the length of the reset groove.

[0025] By adopting the above technical solution, when the linkage plate moves vertically downwards and drives the sliding rod to move closer to the glass window, the linkage plate is fixed by the attraction of the first and second magnetic blocks, preventing the linkage plate from automatically jumping upwards when the ship is rocked and swayed by wind and waves. When the linkage plate moves vertically upwards to reset, the sliding rod automatically slides away from the glass window and resets under the action of the reset spring, facilitating the next movement of the sliding rod by the linkage mechanism.

[0026] Furthermore, the bottom of the glass window is provided with a horizontally arranged U-shaped handle with its opening facing the glass window. The second fixing member includes a fixing rod vertically arranged on the platform. The upper end of the fixing rod is connected to an insertion rod that is horizontally perpendicular to the U-shaped handle. The platform is provided with a sliding groove arranged along the length of the insertion rod. The lower end of the fixing rod is slidably installed in the sliding groove, and an insertion spring is connected between the side of its lower end away from the insertion rod and the sliding groove and the end of the fixed rod that is close to it.

[0027] The bottom of the U-shaped handle is provided with a fixing groove that cooperates with the fixing rod and the insertion rod. The top of the fixing groove is provided with an insertion groove that is perpendicular to the fixing groove and cooperates with the insertion rod. The upper part of the insertion rod away from the fixing rod is provided with a third wedge surface. The bottom side wall of the fixing groove is provided with a fourth wedge surface that cooperates with the third wedge surface.

[0028] The insertion slot is provided with an unlocking slot at the end away from the fixed slot, which is arranged along its length and communicates with it. The unlocking slot at the end away from the insertion slot passes through the side wall of the U-shaped handle. An unlocking rod is horizontally slidably installed in the unlocking slot. A tension spring is connected between the side wall of the unlocking rod and the end wall of the unlocking slot near the insertion slot, which is arranged along the length of the unlocking rod.

[0029] When the glass window is fully closed, the fixing rod is located in the fixing groove, the insertion rod is located in the insertion groove, and the unlocking rod is located in the unlocking groove with its end away from the insertion rod extending out of the unlocking groove and located outside the U-shaped handle under the action of the tension spring.

[0030] By adopting the above technical solution, when the fume hood is closed in the glass window, the fixing rod is located in the fixing groove, the insertion rod is located in the insertion groove, and the end of the unlocking rod away from the insertion rod extends out of the unlocking groove and is located outside the U-shaped handle. In this way, the insertion groove limits the insertion rod, thereby fixing the U-shaped handle, that is, fixing the position of the glass window, thus preventing the glass window from moving up and down on its own when the ship is rocked and turbulent by wind and waves, and ensuring the stability of the glass window.

[0031] When it is necessary to move the glass window upward, press the unlocking lever to compress the tension spring. The end of the unlocking lever near the insertion lever slides from the unlocking slot into the insertion slot, driving the insertion lever to slide and compress the insertion spring until the insertion lever is completely disengaged from the insertion slot and moves into the fixed slot. This releases the insertion slot's restriction on the insertion lever. Then, start the lifting motor to move the glass window upward. After the insertion lever and the fixed lever are completely disengaged from the fixed slot, under the action of the insertion spring, the fixed lever and the insertion lever slide back to their original positions away from the insertion spring. The unlocking lever automatically resets under the action of the tension spring.

[0032] When the glass window slides down to reset, after the bottom of the U-shaped handle contacts the insertion rod, the third wedge surface at the end of the insertion rod and the fourth wedge surface at the bottom of the fixing groove work together to drive the insertion rod and the fixing rod to slide along the length of the insertion rod towards the insertion spring and compress the insertion spring until the insertion rod and the fixing rod are completely aligned with the fixing groove. The insertion rod and the sliding rod then enter the fixing groove from bottom to top. When the insertion rod moves to align with the insertion groove, the insertion rod loses the restriction of the side wall of the fixing groove. Under the action of the insertion spring, the fixing rod drives the insertion rod to slide until the sliding rod enters the insertion groove. Under the restriction of the insertion groove on the insertion rod, the position of the glass window continues to be fixed.

[0033] Furthermore, the fixing assembly includes two parallel and symmetrically arranged locking strips, which are slidably mounted on the platform along a direction perpendicular to their length. Two corner brackets are respectively provided along the length of the two locking strips on their adjacent sides. These corner brackets are slidably mounted on the corresponding locking strips along their length, and each corner bracket has a locking hole on its two right-angled sides with an axis perpendicular to the side it occupies. A locking groove is provided along the length of the two locking strips on their adjacent sides. One right-angled side of the corner bracket is parallel and fitted to the corresponding locking strip, and its position on the locking strip is fixed by a locking screw that mates with the corresponding locking hole and locking groove. Two corner brackets located on the same locking strip are close to each other perpendicular to the right-angled side of the locking strip and are fixedly connected to the experimental instrument by locking screws that mate with the corresponding locking holes.

[0034] By adopting the above technical solution, the distance between the two locking strips is adjusted according to the size of the experimental instrument, and the distance between the two corner brackets on each locking strip is also adjusted. After adjusting the position of the corner brackets, the corner brackets are locked by the locking screws through the cooperation of the corresponding locking holes and locking insertion slots, thus fixing the position of the corner brackets on the locking strips. The experimental instrument is placed between the two locking strips, and the locking screws and locking holes on the corner brackets are used to fix the experimental instrument to the corner brackets, thereby fixing the experimental instrument to the platform. This can prevent the experimental instrument from moving or tipping over inside the fume hood when the ship is rocking and swaying in wind and waves, ensuring the smooth and safe conduct of the experiment, and also preventing the experimental instrument from impacting the fume hood, which would affect the service life of the experimental instrument and the fume hood.

[0035] Furthermore, a rotating disk with its axis vertically aligned and passing through the center of the platform is rotatably mounted on the platform. Two locking strips are synchronously and oppositely slidably mounted on the rotating disk along a direction perpendicular to their length, and the length of the locking strips is less than the distance between the glass window and the back panel. The rotating disk is provided with an adjustment groove along the length of the locking strips, and the locking strips are provided with adjustment blocks slidably mounted in the adjustment grooves. An adjustment screw with an adjustment motor connected to one end is also rotatably mounted in the adjustment grooves along its length. The adjustment screw is threadedly connected to two adjustment blocks, and the threads of the two adjustment blocks rotate in opposite directions.

[0036] By adopting the above technical solution, the adjusting motor drives the adjusting screw to rotate. Under the threaded connection between the adjusting screw and the two adjusting blocks with opposite thread directions, and under the limiting and guiding effect of the adjusting groove on the adjusting blocks, the two locking strips are driven to slide synchronously and in opposite directions along the adjusting groove, thereby adjusting the distance between the two locking strips to match the size of the experimental instrument. First, the experimental instrument is fixed to the two corner brackets near the glass window using locking screws. Then, the rotating disk is driven to rotate 180°, and the other two corner brackets are rotated closer to the glass window before being fixed to the experimental instrument. In this way, the rotating disk can drive the locking strips to rotate, thereby bringing the corner brackets closer to the glass window, facilitating the connection between the corner brackets and the experimental instrument without having to reach into the fume hood for operation. In addition, the cooperation between the adjusting motor and the adjusting screw and adjusting blocks not only facilitates the adjustment of the distance between the two locking strips, but also fixes the position of the locking strips, eliminating the need for an additional structure to fix the locking strips, effectively simplifying the structure of the fixing components.

[0037] Furthermore, the bottom of the two side plates is provided with inserts arranged along their width direction. A mounting plate is fixed on the ship, located below the platform and with its upper surface horizontal. The mounting plate is provided with slots that mate with the corresponding inserts. Between the two slots are two locking bars that are parallel to and perpendicular to the mounting plate. The locking bars are close to the corresponding slots. The locking bars and the side plates are provided with locking holes that mate with each other. The locking holes are arranged horizontally perpendicular to the side plates, and there are several sets of locking holes along the length direction of the locking bars.

[0038] By employing the above technical solution, the side plate bottom and mounting plate are inserted into each other through the cooperation of the insert strip and slot. Then, screws are passed through the locking strip and the locking holes on the side plate to lock the side plate onto the locking strip, thus fixing the entire fume hood to the mounting plate, which in turn fixes the fume hood to the ship. This ensures that the fume hood will not move or tip over when the ship is tossed and turned by wind and waves, guaranteeing the smooth and safe conduct of the experiment. The use of the horizontal mounting plate at the top as a transfer point ensures the fume hood is fixed to the ship, guaranteeing its horizontal and stable installation.

[0039] Furthermore, an inner lining plate is installed on the side of the two side panels that are close to each other, on the side of the back panel that is close to the glass window, and on the side of the top panel that is close to the table. The inner lining plate is made of 316L stainless steel.

[0040] By adopting the above technical solution, 316L stainless steel inner lining plates are installed on the side plates, back plates, and top plates, which improves the corrosion resistance and impact resistance of the entire fume hood, making the fume hood less prone to damage and extending its service life.

[0041] In summary, the present invention has the following beneficial effects:

[0042] 1. In this invention, the overall stability of the fume hood is improved by setting the entire fume hood to an H-shaped structure and fixing the bottom of the side plate to the ship. A lifting motor, lifting shaft, winch, and steel wire rope drive the glass window to rise and fall. First and second fixing components are used to fix the position of the glass window, and fixing components are used to secure the experimental instruments. This ensures that when the ship is tossed and turned by wind and waves, the fume hood will not move or even tip over, the glass window will not move up and down, and the experimental instruments will not move, tip over, or even collide with the fume hood inside, thus preventing leaks during experiments, ensuring the smooth conduct of experiments, and meeting the experimental needs on board ships. Furthermore, by eliminating the counterweight, the possibility of the counterweight shaking and damaging the fume hood is also avoided, increasing the overall service life of the fume hood.

[0043] 2. In this invention, a first fixing component including a suction cup, a vacuum machine, and a sliding rod is used to fix the position of the glass window after it rises. A linkage mechanism including a linkage seat, a linkage plate, a support rod, a support block, a linkage protrusion, a linkage wedge, a linkage disc, a linkage rod, a linkage support rod, a transmission gear, a reset wheel, a reset gear, a reset rod, a reset support rod, a reset protrusion, a limit block, and a reset spring is set up so that when the lifting shaft rotates to wind up the steel wire rope, the linkage mechanism drives the sliding rod to move the suction cup closer to the glass window so that the suction cup can adhere to and fix the glass window. When the lifting shaft rotates to release the steel wire rope, the linkage mechanism drives the sliding rod to move the suction cup away from the glass window so that the glass window can fall and reset.

[0044] 3. In this invention, by setting a second fixing component including a U-shaped handle, a fixing rod, an insertion rod, a sliding groove, an insertion spring, a fixing groove, an insertion groove, a third wedge surface, a fourth wedge surface, an unlocking groove, an unlocking rod, a tension spring, etc., the position of the glass window when it is completely closed can be fixed, and it can be quickly unlocked when the glass window needs to be raised.

[0045] 4. In this invention, by setting a fixing component including locking strips, corner codes, rotating disks, adjusting grooves, adjusting screws, etc., experimental instruments of different sizes can be fixed, and there is no need to put one's body into the fume hood when fixing the experimental instruments, which is convenient for operation. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the overall structure of a marine-grade fume hood;

[0047] Figure 2 This is a schematic diagram of the exploded structure of a marine-grade fume hood;

[0048] Figure 3 This is a partial structural diagram of a marine-grade fume hood;

[0049] Figure 4This is a structural schematic diagram of the first fixing component and linkage mechanism in a marine-grade fume hood.

[0050] Figure 5 This is a structural schematic diagram of the second fixing component in a marine-grade fume hood;

[0051] Figure 6 This is a structural diagram of a fixed component in a marine-grade fume hood.

[0052] In the diagram, 1. Side panel; 11. Platform; 12. Back panel; 13. Top panel; 14. Exhaust hood; 15. Glass window; 16. Column; 17. Insert strip; 18. Lining panel; 2. Mounting plate; 21. Slot; 22. Locking strip; 23. Locking hole; 3. Lifting shaft; 31. Winch; 32. Steel wire rope; 33. Lifting motor; 331. Manual switch; 332. Foot switch; 4. First fixing component; 41. Suction cup; 411. Elastic suction port; 42. Adsorption tube; 43. Vacuum machine; 431. Adsorption switch; 44. Sliding rod; 45. Sliding groove; 46. Second magnetic block; 47. Reset groove; 48. Sliding block; 49. Reset spring; 5. Linkage mechanism; 51. Linkage seat; 52. Linkage plate; 521. Linkage wedge surface; 522. First magnetic block; 53. Support rod; 54. Support seat; 55. Support block; 551. Second wedge surface; 56. Linkage protrusion; 561. First wedge surface; 57. Linkage disc; 58. Linkage rod; 581. Linkage support rod; 59. Transmission gear; 6. Reset wheel; 61. Reset gear; 62. Reset rod; 63. Reset support rod; 64. Limiting block; 65. Reset protrusion; 7. Second fixing member; 71. Fixing rod; 72. Insertion rod; 721. Third wedge surface; 73 74. Sliding groove; 8. Insertion spring; 9. U-shaped handle; 10. Fixing groove; 11. Fourth wedge surface; 12. Insertion groove; 13. Unlocking groove; 14. Unlocking rod; 15. Tension spring; 16. Fixing assembly; 17. Locking bar; 18. Locking groove; 19. Adjusting block; 10. Angle code; 11. Locking hole; 12. Rotary disk; 13. Adjusting groove; 14. Adjusting screw; 15. Adjusting motor. Detailed Implementation

[0053] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0054] A type of marine-grade fume hood, such as Figure 1 and Figure 2 As shown, the device includes a cabinet, which comprises two vertically arranged side panels 1. A horizontally arranged platform 11 connects the two side panels 1, forming an H-shaped structure. The bottoms of the two side panels 1 are fixedly installed on the ship. Figure 2 and Figure 3As shown, a vertically arranged back plate 12 and a top plate 13 parallel to the platform 11 are connected between the two side plates 1. The upper end of the back plate 12 is lower than the upper end of the side plate 1. The top plate 13 is located above the platform 11 and its side near the back plate 12 is connected to the upper end of the back plate 12. An air suction hood 14 is installed on the top plate 13, and a guide plate that cooperates with the air suction hood 14 is installed inside the fume hood.

[0055] like Figure 3 As shown, the side of the platform 11 closest to the back panel 12 is connected to the lower end of the back panel 12. A glass window 15 located on the opposite side of the back panel 12 connects the platform 11 and the top panel 13. The height of the glass window 15 is greater than the vertical distance between the platform 11 and the top panel 13. Figure 2 and Figure 3 As shown, vertically arranged columns 16 are provided on the side of each side panel 1 away from the back panel 12, located on both sides of the glass window 15. The glass window 15 is vertically slidably mounted on the columns 16, and the columns 16 integrate the electrical control structures of the fume hood, such as sockets and control panels. The basic structure and working principle of the fume hood are the same as those of existing technology and will not be described in detail. The baffle is not shown in the figure, while the sockets and control panels are simply shown in the figure.

[0056] like Figure 1 As shown, the fume hood has an overall H-shaped structure, with the bottom of the side panel 1 fixed to the ship to prevent it from moving or even tipping over during rough seas. The back panel 12 and the platform 11 support the side panel 1, ensuring the stability of the overall structure. To improve the fume hood's corrosion resistance, such as... Figures 1 to 3 As shown, 316L stainless steel lining plates 18 are installed on the side where the two side panels 1 are close to each other, on the side of the back panel 12 near the glass window 15, and on the side of the top panel 13 near the platform 11 to ensure the fume hood's corrosion resistance and impact resistance. Of course, in other embodiments, the lining plates 18 can also be made of other materials with good corrosion resistance and impact resistance.

[0057] like Figure 1 and Figure 2As shown, to secure the bottom of the side plate 1, insert strips 17 are provided at the bottom of both side plates 1 along their width direction. A mounting plate 2, located below the platform 11 and with its upper surface horizontal, is fixed to the ship. The mounting plate 2 has slots 21 that mate with the corresponding insert strips 17. Two locking strips 22, parallel to and perpendicular to the mounting plate 2, are provided between the two slots 21. The locking strips 22 are close to their corresponding slots 21. Locking holes 23, which mate with each other, are provided on the locking strips 22 and the side plate 1. These locking holes 23 are horizontally positioned perpendicular to the side plate 1, and several groups of locking holes 23 are arranged along the length of the locking strips 22. Each group of locking holes 23 contains a locking screw. This secures the side plate 1 to the horizontally positioned mounting plate 2, allowing the fume hood to be horizontally installed on the ship, ensuring the stability of the fume hood installation. The mounting plate 2 can be fixed to the ship using screws or welding, depending on the specific application.

[0058] like Figure 1 and Figure 3 As shown, to achieve automatic lifting and lowering of the glass window 15, a lifting shaft 3, perpendicular and horizontally arranged, is connected between the two side plates 1. The lifting shaft 3 is located above the top plate 13 and is rotatably mounted on the side plate 1 around its axis, with one end connected to a lifting motor 33 that drives its rotation. Winches 31, coaxially arranged with the lifting shaft 3, are installed at both ends of the lifting shaft 3. Steel wire ropes 32 are connected to the upper ends of both sides of the glass window 15, with the ends of the steel wire ropes 32 away from the glass window 15 wound around the corresponding winches 31. The lifting motor 33 drives the lifting shaft 3 to rotate forward or reverse, causing the lifting shaft 3 to rotate and rotate the winches 31 to wind up or unwind the steel wire ropes 32. Winding up the steel wire ropes 32 pulls the glass window 15 upward, while unwinding the steel wire ropes 32 causes the glass window 15 to descend and reset under its own weight.

[0059] like Figure 1 and Figure 3 As shown, this electronically controlled structure enables the automatic raising and lowering of the glass door. The lifting motor 33 stops and starts instantly. Compared to a counterweight-driven system, this avoids the counterweight swaying during ship rocking, preventing the glass window 15 from moving up and down on its own, thus ensuring the stability of the glass window 15. Furthermore, it prevents the counterweight from swaying and impacting the fume hood, extending the fume hood's lifespan. For example... Figure 3 As shown, a manual switch 331 and a foot switch 332 for controlling the opening and closing of the lifting motor 33 are installed on one of the columns 16. The manual switch 331 is located above the platform 11, and the foot switch 332 is located at the bottom of the column 16. The manual switch 331 or the foot switch 332 can be used to open and close the lifting motor 33 according to the actual situation.

[0060] like Figure 3As shown, although the glass window 15 will not descend vertically as long as the lifting shaft 3 does not rotate, the ship's rocking and swaying may cause the steel cable 32 to loosen, resulting in the glass window 15 moving upwards and causing it to sway up and down. Therefore, a first fixing member 4 is provided on the top plate 13 to fix the glass window 15 in the open position, and a second fixing member 7 is provided on the platform 11 to fix the glass window 15 in the closed position. The second fixing member 7 is marked as follows: Figure 5 and Figure 6 middle.

[0061] Specifically, such as Figure 3 and Figure 4 As shown, the first fixing member 4 includes a suction cup 41 with its axis perpendicular to the back plate 12 and horizontally arranged with the glass window 15. The opening of the suction cup 41 faces the side of the glass window 15 near the back plate 12. The suction cup 41 is connected to a vacuum machine 43 mounted on the top plate 13 via an adsorption tube 42, and the adsorption switch 431 of the vacuum machine 43 is mounted on the column 16. A sliding rod 44 is also connected to the side of the suction cup 41 away from the glass window 15, and the sliding rod 44 is slidably mounted on the top plate 13 along its length.

[0062] like Figure 3 and Figure 4 As shown, after the glass window 15 moves into position, the suction cup 41 is driven by the sliding rod 44 to slide close to the glass window 15. Then, the vacuum machine 43 is activated by the adsorption switch 431. The vacuum machine 43 uses the adsorption tube 42 to create a vacuum on the suction cup 41, thereby adsorbing and fixing the suction cup 41 and the glass window 15. This fixes the glass window 15 in its open position and prevents it from moving up and down due to the vibration and loosening of the steel wire rope 32. A rectangular array of elastic suction ports 411 is provided on the side of the suction cup 41 near the glass window 15, increasing the adsorption points between the suction cup 41 and the glass window 15 and improving the stability of fixing the glass window 15.

[0063] like Figure 3 and Figure 4 As shown, in order to achieve the linkage between the movement of the suction cup 41 and the lifting of the glass window 15, a linkage mechanism 5 is provided between the sliding rod 44 and the lifting shaft 3. When the lifting shaft 3 rotates and drives the winch 31 to wind up the steel wire rope 32, causing the glass window 15 to rise, the linkage mechanism 5 drives the sliding rod 44 to drive the suction cup 41 to slide closer to the glass window 15. When the lifting shaft 3 rotates and drives the winch 31 to release the steel wire rope 32, causing the glass window 15 to fall, the linkage mechanism 5 drives the sliding rod 44 to drive the suction cup 41 to slide away from the glass window 15.

[0064] Specifically, such as Figure 3 and Figure 4As shown, the linkage mechanism 5 includes a linkage seat 51 mounted on the top plate 13 and located between the lifting shaft 3 and the glass window 15. A linkage plate 52 is vertically slidably mounted on the linkage seat 51. An inclined support rod 53 is provided on the side of the linkage seat 51 near the lifting shaft 3. The support rod 53 is located on the side of the linkage plate 52 near the linkage seat 51, with its upper end away from the linkage plate 52. A vertically mounted support seat 54 is connected to the lower end of the support rod 53. The connection between the support rod 53 and the support seat 54 is rotatably mounted on the linkage seat 51, with its rotation axis parallel to the axis of the lifting shaft 3 and located on the side of the support rod 53 away from the linkage plate 52. A support block 55 is provided on the bottom of the support seat 54 away from its rotation axis. The support rod 53, support seat 54, and support block 55 are integrally formed. The support rod 53 and support block 55 are located on two different vertical planes. Normally, the support block 55 is in a horizontal state and its side wall near the linkage plate 52 abuts against the side wall of the linkage plate 52.

[0065] like Figure 4 As shown, a linkage protrusion 56 that mates with the support block 55 is provided at the bottom of the linkage plate 52 near the support block 55. A first wedge surface 561 that slopes downwards is provided on the upper end surface of the linkage protrusion 56, and a second wedge surface 551 that mates with the first wedge surface 561 is provided on the lower end surface of the support block 55. A sliding groove 45 is provided on the top plate 13 along the length of the sliding rod 44. The sliding rod 44 is slidably installed in the sliding groove 45. A linkage wedge surface 521 that mates with each other is provided at the bottom of the linkage plate 52 and at the end of the sliding rod 44 away from the suction cup 41.

[0066] like Figure 4 As shown, a reset groove 47 is provided on the side wall of the sliding groove 45, which is arranged along its length and communicates with it. A sliding block 48 is provided on the side wall of the sliding rod 44, which is slidably installed in the reset groove 47. A reset spring 49 is connected between the side of the sliding block 48 away from the glass window 15 and the end of the reset groove 47 that is close to it. The reset spring 49 is located in the reset groove 47 and is arranged along the length of the reset groove 47. In normal condition, the bottom of the linkage protrusion 56 rests on the upper surface of the support block 55, the linkage plate 52 is located above the sliding groove 45, and the sliding rod 44 keeps the suction cup 41 away from the glass window 15 under the action of the reset spring 49. The linkage wedge surface 521 at the bottom of the linkage plate 52 is located directly above the linkage wedge surface 521 at the end of the sliding rod 44.

[0067] like Figure 4As shown, a linkage disc 57 coaxial with the lifting shaft 3 is installed on the lifting shaft 3. A linkage rod 58 is provided on the outer wall of the linkage disc 57 along its radial direction. A linkage support rod 581 is hinged to the end of the linkage rod 58 away from the linkage disc 57. The hinge axis of the linkage support rod 581 is located at its end near the linkage rod 58 and parallel to the lifting shaft 3. Under normal conditions, the linkage support rod 581 is always collinear with the linkage rod 58, and the hinge axis of the linkage support rod 581 is always located on the outer side of the support rod 53 away from the linkage plate 52. The linkage support rod 581 can maintain its collinearity with the linkage rod 58 under normal conditions by installing a torsion spring on its hinge axis or other existing technologies, which will not be elaborated further and is not shown in the figure.

[0068] like Figure 4 As shown, a transmission gear 59 coaxial with the lifting shaft 3 is mounted on the lifting shaft 3. A reset wheel 6, with its axis parallel to the lifting shaft 3 and located above the lifting shaft 3, is rotatably mounted on the top plate 13. A reset gear 61, coaxial with the reset wheel 6 and meshing with the transmission gear 59, is mounted on the reset wheel 6. Under the meshing action of the transmission gear 59 and the reset gear 61, the reset wheel 6 is driven to rotate synchronously with the lifting shaft 3, and the rotation direction of the reset wheel 6 is opposite to the rotation direction of the lifting shaft 3.

[0069] like Figure 4 As shown, a reset rod 62 is installed on the outer wall of the reset wheel 6, arranged radially and located on one side of the reset gear 61. The reset rod 62 and the linkage rod 58 are offset. A reset support rod 63 with its rotation axis parallel to the axis of the reset wheel 6 is hinged to the end of the reset rod 62 away from the reset wheel 6. The rotation axis of the reset support rod 63 is located at its end near the reset rod 62, and the reset support rod 63 and the reset rod 62 are always collinear under normal conditions. A reset protrusion 65 is provided on the upper end of the linkage plate 52 near the lifting shaft 3, on the same side as the linkage protrusion 56. The reset support rod 63 cooperates with the reset protrusion 65.

[0070] like Figure 4 As shown, a limiting block 64 is provided at the end of the reset rod 62 near the reset support rod 63, which cooperates with the reset support rod 63 and is perpendicular to the rotation axis of the reset support rod 63. The limiting block 64 ensures that when the reset support rod 63 moves downward from above the reset protrusion 65, the reset support rod 63 is pushed upward by the reset protrusion 65 and rotates around its axis. When the reset support rod 63 moves upward from below the reset protrusion 65, the reset support rod 63 cannot rotate around its axis. Alternatively, the reset support rod 63 can be kept collinear with the reset rod 62 under normal conditions by installing a torsion spring on its hinge shaft, etc., which will not be elaborated further and is not shown in the figure.

[0071] like Figure 4As shown, when the lifting shaft 3 rotates, driving the winch 31 to wind the wire rope 32, the lifting shaft 3 drives the linkage disc 57 to rotate synchronously. During the rotation of the linkage disc 57, the linkage rod 58 and the linkage support rod 581 rotate. The linkage support rod 581 pushes the support rod 53 upward from below. The support rod 53 drives the support block 55 to rotate through the support seat 54, causing the support block 55 to disengage from below the linkage protrusion 56. After the linkage protrusion 56 loses the support of the support block 55, the linkage plate 52 automatically falls downward under its own gravity. Under the cooperation of the linkage wedge surface 521 at the bottom of the linkage plate 52 and the linkage wedge surface 521 at the end of the sliding rod 44, during the downward sliding of the linkage plate 52, the sliding rod 44 drives the suction cup 41 to slide towards the glass window 15, so that the suction cup 41 adheres to the glass window 15. Under the limiting effect of the linkage plate 52, the sliding rod 44 is prevented from automatically sliding away from the glass window 15.

[0072] like Figure 4 As shown, simultaneously, the lifting shaft 3, through the meshing of the transmission gear 59 and the reset gear 61, drives the reset wheel 6 to rotate synchronously in the opposite direction. The reset wheel 6 drives the reset rod 62 and the reset support rod 63 to rotate downward from above the reset protrusion 65. The reset support rod 63, from above the reset protrusion 65, is pushed by the reset protrusion 65 to rotate around its hinge axis until the reset support rod 63 and the reset rod 62 pass over the reset protrusion 65, at which point the reset support rod 63 returns to its original position, thus avoiding interference between the reset support rod 63 and the reset protrusion 65. When the lifting shaft 3 stops rotating, the vacuum machine 43 is activated by the adsorption switch 431, causing the suction cup 41 to adsorb and fix with the glass window 15, thereby fixing the position of the glass window 15 and preventing the glass window 15 from shaking up and down on its own when the ship is rocking.

[0073] Among them, such as Figure 4 As shown, to prevent the linkage plate 52 from moving up and down on its own when bumping, a first magnetic block 522 is embedded at the bottom of the linkage plate 52, and a second magnetic block 46 located directly below the linkage plate 52 and cooperating with the first magnetic block 522 is embedded in the sliding groove 45. When the linkage plate 52 slides down and drives the sliding rod 44 to move the suction cup 41 closer to the glass window 15, the position of the linkage plate 52 is fixed by the cooperation of the first magnetic block 522 and the second magnetic block 46.

[0074] like Figure 4As shown, when the lifting shaft 3 rotates, driving the winch 31 to rotate and release the wire rope 32, the lifting shaft 3, through the meshing of the transmission gear 59 and the reset gear 61, drives the reset wheel 6 to rotate synchronously in the opposite direction. The reset wheel 6 drives the reset rod 62 and the reset support rod 63 to rotate upward from below the reset protrusion 65. Under the limiting action of the limit block 64, the reset support rod 63 cannot rotate downward, thus allowing the reset support rod 63 to push the reset protrusion 65 from below, lifting the linkage plate 52 vertically upward. During the upward movement of the linkage plate 52, the first wedge surface 561 above the linkage protrusion 56 and the second wedge surface 551 below the support block cooperate to make way for the linkage protrusion 56 by rotating the support block 55 away from the linkage plate 52 until the linkage protrusion 56 moves above the support block 55. The support rod 53 drives the support block 55 to rotate and reset automatically. The bottom of the linkage protrusion 56 rests on the upper surface of the support block 55, and the reset support rod 63 disengages from the reset protrusion 65, thereby realizing the upward reset of the linkage plate 52 and releasing the limiting effect on the sliding rod 44 so that the sliding rod 44 can drive the suction cup 41 to reset.

[0075] like Figure 4 As shown, simultaneously, the lifting shaft 3 drives the linkage disc 57 to rotate, and the linkage support rod 581 contacts the support rod 53 from above, causing the support rod 53 to tend to rotate downwards, that is, the support seat 54 tends to rotate closer to the side wall of the linkage plate 52. However, due to the limiting effect of the linkage plate 52 on the support seat 54, the support rod 53 cannot rotate. Then, under the reaction force of the support rod 53, the linkage support rod 581 is pushed by the support rod 53 to rotate upwards around its axis until the linkage rod 58 drives the linkage support rod 581 to pass around the support rod 53, and the linkage support rod 581 automatically resets. This process is repeated to avoid interference between the linkage support rod 581 and the support rod 53 when the lifting shaft 3 rotates to release the wire rope 32, which would affect the normal rotation of the lifting shaft 3.

[0076] like Figure 3 and Figure 5 As shown, in this embodiment, a U-shaped handle 8 is horizontally arranged at the bottom of the glass window 15 with its opening facing the glass window 15. The second fixing member 7 includes a fixing rod 71 vertically arranged on the platform 11, and an insertion rod 72 that is horizontally perpendicular to the U-shaped handle 8 is connected to the upper end of the fixing rod 71. Figure 5 and Figure 6 As shown, a sliding groove 73 is provided on the platform 11 along the length of the insertion rod 72. The lower end of the fixing rod 71 is slidably installed in the sliding groove 73, and an insertion spring 74 is connected between the side of its lower end away from the insertion rod 72 and the sliding groove 73 and its adjacent end.

[0077] like Figure 5As shown, a fixing groove 81 is provided at the bottom of the U-shaped handle 8 to cooperate with the fixing rod 71 and the insertion rod 72. An insertion groove 82 is provided at the top of the fixing groove 81, which is perpendicular to the fixing groove 81 and cooperates with the insertion rod 72. When the fume hood is closed, the fixing rod 71 is located in the fixing groove 81 and the insertion rod 72 is located in the insertion groove 82. Under the limiting effect of the insertion groove 82 on the insertion rod 72, the U-shaped handle 8 is fixed, that is, the position of the glass window 15 in the closed state is fixed.

[0078] like Figure 5 As shown, to facilitate unlocking and automatic locking of the second fixing member 7, an unlocking groove 83 is provided at the end of the insertion groove 82 away from the fixing groove 81, extending along its length and communicating with it. The end of the unlocking groove 83 away from the insertion groove 82 passes through the upper end of the U-shaped handle 8. An unlocking rod 84, sliding along its length, is provided within the unlocking groove 83. A tension spring 85 is connected between the side wall of the unlocking rod 84 and the end wall of the unlocking groove 83 near the insertion groove 82. Figure 3 and Figure 5 As shown, when the glass window 15 is fully closed, the unlocking lever 84 extends out of the unlocking slot 83 at the end away from the insertion lever 72 under the action of the tension spring 85. Additionally, as... Figure 5 and Figure 6 As shown, a third wedge surface 721 is provided above the end of the insertion rod 72 away from the fixing rod 71, and a fourth wedge surface 811 that cooperates with the third wedge surface 721 is provided on the bottom side wall of the fixing groove 81.

[0079] like Figure 5 As shown, when the glass window 15 needs to be moved upward, pressing the unlocking lever 84 compresses the tension spring 85. The end of the unlocking lever 84 near the insertion lever 72 slides from the unlocking slot 83 into the insertion slot 82, driving the insertion lever 72 to slide and compress the insertion spring 74, until the insertion lever 72 completely disengages from the insertion slot 82 and moves into the fixed slot 81, releasing the limitation of the insertion slot 82 on the insertion lever 72. Then, the lifting motor 33 is started to move the glass window 15 upward. After the glass window 15 continues to move upward and the insertion lever 72 and the fixed lever 71 completely disengage from the fixed slot 81, under the action of the insertion spring 74, the fixed lever 71 and the insertion lever 72 slide back to their original positions away from the insertion spring 74, and the unlocking lever 84 automatically resets under the action of the tension spring 85.

[0080] like Figure 5As shown, when the glass window 15 slides down to reset, after the bottom of the U-shaped handle 8 contacts the insertion rod 72, the insertion rod 72 is driven to slide along the length of the insertion rod 72 towards the insertion spring 74 under the combined action of the third wedge surface 721 at the end of the insertion rod 72 and the fourth wedge surface 811 at the bottom of the fixing groove 81, thus compressing the insertion spring 74 until the insertion rod 72 and the fixing rod 71 are completely aligned with the fixing groove 81. During the continuous descent of the glass window 15, the insertion rod 72 and the sliding rod 44 enter the fixing groove 81 from bottom to top. When the insertion rod 72 moves to align with the insertion groove 82, the insertion rod 72 loses the restriction of the side wall of the fixing groove 81. Under the action of the insertion spring 74, the fixing rod 71 drives the insertion rod 72 to slide until the sliding rod 44 enters the insertion groove 82. Under the restriction of the insertion groove 82 on the insertion rod 72, the position of the glass window 15 is still fixed.

[0081] like Figure 2 and Figure 6 As shown, to prevent the experimental instruments on the platform 11 from moving, tipping over, or even hitting the fume hood due to the rocking and swaying of the ship in wind and waves, a fixing component 9 for securing the experimental instruments is also installed on the platform 11. Specifically, the fixing component 9 includes two parallel and symmetrically arranged locking strips 91. The two locking strips 91 are slidably installed on the platform 11 along a direction perpendicular to their length, and are connected to a drive structure that drives them to slide and fixes their position after sliding. On the side of the two locking strips 91 that are close to each other, two corner brackets 92 are respectively provided along their length. The corner brackets 92 are slidably installed on the locking strips 91 along the length direction of the corresponding locking strips 91, and each of the two right-angled sides of the corner bracket 92 has a locking hole 921 with its axis perpendicular to the horizontal direction of the side it is on.

[0082] like Figure 6 As shown, a locking groove 911 is provided along the length of the two locking bars 91 on one side where they are close to each other. One right-angled side of the corner bracket 92 is parallel and fitted to the corresponding locking bar 91, and its position on the locking bar 91 is fixed by a locking screw that mates with the corresponding locking hole 921 and locking groove 911. Two corner brackets 92 located on the same locking bar 91 are perpendicular to the right-angled side of the locking bar 91 and are close to each other, and are fixedly connected to the experimental instrument by a locking screw that mates with the corresponding locking hole 921.

[0083] like Figure 6As shown, adjust the distance between the two locking strips 91 according to the size of the experimental instrument, and adjust the distance between the two corner brackets 92 on each locking strip 91. After adjusting the position of the corner brackets 92, use the locking screws and the corresponding locking holes 921 and locking insertion slots 82 to lock the corner brackets 92, thus fixing their position on the locking strips 91. Place the experimental instrument between the two locking strips 91, and use the locking screws and the locking holes 23 on the corner brackets 92 to fix the experimental instrument to the corner brackets 92, thus fixing the experimental instrument on the platform 11.

[0084] In this embodiment, as Figure 2 and Figure 6 As shown, a rotating disk 93 with its axis vertically aligned and passing through the center of the platform 11 is rotatably mounted on the platform 11. A motor driving the rotation of the rotating disk 93 is connected to its bottom. Two locking bars 91 are synchronously and oppositely slidably mounted on the rotating disk 93 along a direction perpendicular to their length, and the length of the locking bars 91 is less than the distance between the glass window 15 and the back panel 12. An adjustment groove 94 is provided on the rotating disk along the length of the locking bars 91. The driving structure includes an adjustment screw 95, which is rotatably mounted in the adjustment groove 94 along its length and about its axis. One end of the adjustment screw 95 is connected to an adjustment motor 96 that drives its rotation. Adjustment blocks 912 are slidably mounted on the locking bars 91 within the adjustment grooves 94. The adjustment screw 95 is threadedly connected to two adjustment blocks 912, and the threads of the two adjustment blocks 912 rotate in opposite directions.

[0085] like Figure 6 As shown, the adjusting motor 96 drives the adjusting screw 95 to rotate. Under the threaded connection between the adjusting screw 95 and the two adjusting blocks 912 with opposite thread directions, and under the limiting and guiding effect of the adjusting groove 94 on the adjusting blocks 912, the two locking strips 91 are driven to slide synchronously and in opposite directions along the adjusting groove 94, thereby adjusting the distance between the two locking strips 91 to match the size of the experimental instrument. After the adjusting motor 96 stops rotating, the position of the locking strips 91 is fixed. First, the experimental instrument is fixed to the two corner brackets 92 near the glass window 15 using locking screws. Then, the rotating disk 93 is driven to rotate 180°, and the other two corner brackets 92 are rotated closer to the glass window 15 before being fixed to the experimental instrument. In this way, the rotating disk 93 can drive the locking strips 91 to rotate, thereby bringing the corner brackets 92 closer to the glass window 15, which facilitates the connection of the corner brackets 92 to the experimental instrument without having to reach into the fume hood for operation.

[0086] Working principle and usage of this invention:

[0087] Under normal conditions, the fume hood is fixed to the ship by the connection between the bottom of the side plate 1 and the mounting plate 2. The experimental instruments are fixed to the platform 11 by the connection with the four corner brackets 92 in the fixing component 9. The bottom of the glass window 15 is fixed in the closed state by the cooperation of the insertion rod 72 and the insertion slot 82 in the second fixing component 9. This prevents the entire fume hood from moving or even tipping over when the ship is rocked by wind and waves, prevents the glass window 15 from moving up and down automatically due to the loosening of the steel wire rope 32, and prevents the experimental instruments from moving or even tipping over or the fume hood from being installed. This ensures the sealing and safety of the experiment and avoids the interruption of the experiment.

[0088] When the glass window 15 needs to be opened, the locking lever 84 in the second fixing component 9 is pressed to release the limiting engagement between the insertion lever 72 and the insertion slot 82. Then, the lifting motor 33 is started by the manual switch 331 or the foot switch 332, which drives the lifting shaft 3 to rotate the winch 31 and wind up the steel wire rope 32, pulling the glass window 15 upward. When the lifting shaft 3 rotates, it drives the sliding rod 44 through the linkage mechanism 5 to move the suction cup 41 closer to the glass window 15. After the glass window 15 is opened to the correct position, the lifting motor 33 is turned off, and the vacuum machine 43 is started by the suction switch 431. The vacuum machine 43 uses the suction tube 42 to create a vacuum on the suction cup 41, thereby adsorbing and fixing the suction cup 41 and the glass window 15, thus fixing the position of the glass window 15 after it is opened and preventing the glass window 15 from moving up and down due to the vibration and loosening of the steel wire rope 32.

[0089] When it is necessary to close the glass window 15, turn off the vacuum machine 43, start the lifting motor 33 to drive the lifting shaft 3 to rotate the winch 31 to release the steel wire rope 32. The lifting shaft 3 drives the sliding rod 44 through the linkage mechanism 5 to move the suction cup 41 away from the glass window 15. The glass window 15 automatically descends under the action of gravity. When the bottom of the U-shaped handle 8 is released from the insertion rod 72, under the action of the cooperation between the third wedge surface 721 at the end of the insertion rod 72 and the fourth wedge surface 811 at the bottom of the fixing groove 81, and the action of the insertion spring 74, the glass window 15 is reset and the insertion rod 72 automatically enters the insertion groove 82 to fix the glass window 15.

[0090] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A marine-grade fume hood, characterized in that: The cabinet includes two vertically arranged side panels (1), and a horizontally arranged platform (11) is connected between the two side panels (1). The platform (11) and the two side panels (1) form an H-shaped structure, and the bottom of the two side panels (1) is fixedly installed on the ship. A vertically arranged back panel (12) and a top panel (13) parallel to the platform (11) are connected between the two side panels (1). The top panel (13) is located above the platform (11) and its side near the back panel (12) is connected to the upper end of the back panel (12). A suction hood (14) is installed on the top panel (13). The platform (11) is connected to the lower end of the back plate (12) on the side closest to the back plate (12). A glass window (15) located on the opposite side of the back plate (12) is connected between the platform (11) and the top plate (13). The height of the glass window (15) is greater than the vertical distance between the platform (11) and the top plate (13). The two side plates (1) are provided with vertical columns (16) on the side away from the back plate (12), respectively located on both sides of the glass window (15). The glass window (15) is vertically slidably mounted on the column (16). A lifting shaft (3) is connected between the two side plates (1) and is arranged vertically and horizontally thereto. The lifting shaft (3) is located above the top plate (13) and is mounted on the side plate (1) around its axis. A winch (31) is installed at both ends of the lifting shaft (3) and is arranged coaxially thereto. A steel wire rope (32) is connected to the upper ends of both sides of the glass window (15). The end of the steel wire rope (32) away from the glass window (15) is wound on the corresponding winch (31). A lifting motor (33) that drives the lifting shaft (3) to rotate is connected to one end of the lifting shaft (3). A manual switch (331) and a foot switch (332) for controlling the opening and closing of the lifting motor (33) are installed on one of the columns (16). The manual switch (331) is located above the platform (11), and the foot switch (332) is located at the bottom of the column (16). The top plate (13) is equipped with a first fixing member (4) for fixing the glass window (15), the platform (11) is equipped with a second fixing member (7) for fixing the bottom of the glass window (15), and the platform (11) is also equipped with a fixing component (9) for fixing the experimental instruments. The first fixing member (4) includes a suction cup (41) with its axis perpendicular to the back plate (12) and its opening facing the side of the glass window (15) near the back plate (12). The suction cup (41) is connected to a vacuum machine (43) mounted on the top plate (13) via an adsorption tube (42). The side of the suction cup (41) away from the glass window (15) is also connected to a sliding rod (44) along its axis. The sliding rod (44) is slidably mounted on the top plate (13) along its length direction. The adsorption switch (431) of the vacuum machine (43) is mounted on the column (16). A linkage mechanism (5) is provided between the sliding rod (44) and the lifting shaft (3). When the lifting shaft (3) rotates to wind up the steel wire rope (32), the linkage mechanism (5) drives the sliding rod (44) to slide towards the glass window (15).

2. The marine-grade fume hood according to claim 1, characterized in that: The linkage mechanism (5) includes a linkage seat (51) disposed on the top plate (13) and located between the lifting shaft (3) and the glass window (15). A linkage plate (52) is vertically slidably mounted on the linkage seat (51). An inclined support rod (53) is provided on the side of the linkage seat (51) near the lifting shaft (3). The support rod (53) is located on the side of the linkage plate (52) near the linkage seat (51) and its upper end is away from the linkage plate (52). The lower end of the support rod (53) is connected to a vertically arranged support seat (54). The support rod (53) and the support seat (54) are connected to each other. The connection is rotatably mounted on the linkage seat (51), and its rotation axis is parallel to the axis of the lifting shaft (3) and located on the side of the support rod (53) away from the linkage plate (52); the bottom of the support seat (54) is provided with a support block (55) on the side away from its rotation axis, and the bottom of the linkage plate (52) near the support block (55) is provided with a linkage protrusion (56) that cooperates with the support block (55). The upper end surface of the linkage protrusion (56) is provided with a first wedge surface (561) that is inclined downward, and the lower end surface of the support block (55) is provided with a second wedge surface (551) that cooperates with the first wedge surface (561). The top plate (13) is provided with a sliding groove (45) along the length of the sliding rod (44). The sliding rod (44) is slidably installed in the sliding groove (45). The bottom of the linkage plate (52) and the end of the sliding rod (44) away from the suction cup (41) are provided with a linkage wedge surface (521) that cooperates with each other. In normal condition, the bottom of the linkage protrusion (56) rests on the upper surface of the support block (55), the linkage plate (52) is located above the sliding groove (45), and the linkage wedge surface (521) at the bottom of the linkage plate (52) is located directly above the linkage wedge surface (521) at the end of the sliding rod (44). A linkage disc (57) coaxial with the lifting shaft (3) is installed on the lifting shaft (3). A linkage rod (58) is provided on the outer wall of the linkage disc (57) along its radial direction. A linkage support rod (581) is hinged to the end of the linkage rod (58) away from the linkage disc (57). The hinge axis of the linkage support rod (581) is located at the end of the linkage rod (58) and is parallel to the lifting shaft (3). Normally, the linkage support rod (581) is always collinear with the linkage rod (58), and the hinge axis of the linkage support rod (581) is always located at the end of the lifting shaft (3). The support rod (53) is located on the outer side away from the linkage plate (52). When the lifting shaft (3) rotates to wind up the wire rope (32), the linkage rod (58) drives the linkage support rod (581) to push the support rod (53) upward from below, so that the support rod (53) drives the support block (55) to rotate and disengage from the linkage protrusion (56). When the lifting shaft (3) rotates to release the wire rope (32), the linkage support rod (581) is pushed by the support rod (53) from above the support rod (53) and rotates around its hinge axis.

3. A marine-grade fume hood according to claim 2, characterized in that: A transmission gear (59) coaxial with the lifting shaft (3) is installed on the lifting shaft (3). A reset wheel (6) with its axis parallel to the lifting shaft (3) and located above the lifting shaft (3) is rotatably mounted on the top plate (13). A reset gear (61) coaxial with the reset wheel (6) and meshing with the transmission gear (59) is installed on the reset wheel (6). A reset rod (62) is installed on the outer wall of the reset wheel (6) along its radial direction and located on one side of the reset gear (61). The reset rod (62) and the linkage rod (58) are misaligned. The reset rod (62) is hinged to a reset support rod (63) with its rotation axis parallel to the axis of the reset wheel (6) at the end away from the reset wheel (6). The rotation axis of the reset support rod (63) is located at the end of the reset rod (62), and the reset support rod (63) and the reset rod (62) are always collinear in normal operation. The upper end of the linkage plate (52) is provided with a reset protrusion (65) on the side near the lifting shaft (3) and is located on the same side as the linkage protrusion (56). The reset support rod (63) cooperates with the reset protrusion (65). When the lifting shaft (3) rotates to wind up the wire rope (32), the reset rod (62) drives the reset support rod (63) to rotate downward from above the reset protrusion (65). The reset support rod (63) is pushed by the reset protrusion (65) from above the reset protrusion (65) to rotate around its hinge axis. The reset rod (62) is also provided with a limiting block (64) at one end near the reset support rod (63) that cooperates with the reset support rod (63) and is perpendicular to the rotation axis of the reset support rod (63). When the lifting shaft (3) rotates to release the wire rope (32), the reset rod (62) drives the reset support rod (63) to rotate upward from below the reset protrusion (65). Under the action of the limiting block (64), the reset support rod (63) cannot rotate and lifts the linkage plate (52) upward as a whole through the reset protrusion (65). Under the cooperation of the first wedge surface (561) and the second wedge surface (551), the linkage protrusion (56) drives the support rod (53) to rotate through the support block until the linkage protrusion (56) moves up to the top of the support block and rests on the support block.

4. A marine-grade fume hood according to claim 2 or 3, characterized in that: The bottom of the linkage plate (52) is fitted with a first magnetic block (522), and the sliding groove (45) is fitted with a second magnetic block (46) located directly below the linkage plate (52) and cooperating with the first magnetic block (522); the side wall of the sliding groove (45) is provided with a reset groove (47) arranged along its length and communicating with it; the side wall of the sliding rod (44) is provided with a sliding block (48) slidably installed in the reset groove (47); a reset spring (49) is connected between the side of the sliding block (48) away from the glass window (15) and the end of the reset groove (47) that is close to it; the reset spring (49) is located in the reset groove (47) and arranged along the length of the reset groove (47).

5. A marine-grade fume hood according to claim 1, characterized in that: The bottom of the glass window (15) is provided with a horizontally arranged U-shaped handle (8) with the opening facing the glass window (15). The second fixing member (7) includes a fixing rod (71) vertically arranged on the platform (11). The upper end of the fixing rod (71) is connected to an insertion rod (72) that is horizontally perpendicular to the U-shaped handle (8). The platform (11) is provided with a sliding groove (73) arranged along the length direction of the insertion rod (72). The lower end of the fixing rod (71) is slidably installed in the sliding groove (73), and an insertion spring (74) is connected between the side of its lower end away from the insertion rod (72) and the sliding groove (73) and its adjacent end. The bottom of the U-shaped handle (8) is provided with a fixing groove (81) that cooperates with the fixing rod (71) and the insertion rod (72). The top of the fixing groove (81) is provided with an insertion groove (82) that is perpendicularly connected to the fixing groove (81) and cooperates with the insertion rod (72). The upper part of the insertion rod (72) away from the fixing rod (71) is provided with a third wedge surface (721). The bottom side wall of the fixing groove (81) is provided with a fourth wedge surface (811) that cooperates with the third wedge surface (721). The insertion slot (82) is provided with an unlocking slot (83) at the end away from the fixing slot (81) along its length and communicating with it. The end of the unlocking slot (83) away from the insertion slot (82) passes through the side wall of the U-shaped handle (8). An unlocking rod (84) is horizontally slidably installed in the unlocking slot (83). A tension spring (85) is connected between the side wall of the unlocking rod (84) and the end wall of the unlocking slot (83) near the insertion slot (82) along the length of the unlocking rod (84). When the glass window (15) is completely closed, the fixing rod (71) is located in the fixing groove (81), the insertion rod (72) is located in the insertion groove (82), and the unlocking rod (84) is located in the unlocking groove (83), with its end away from the insertion rod (72) extending out of the unlocking groove (83) under the action of the tension spring (85) and located outside the U-shaped handle (8).

6. A marine-grade fume hood according to claim 1, characterized in that: The fixing component (9) includes two parallel and symmetrically arranged locking strips (91), which are slidably mounted on the platform (11) along a direction perpendicular to their length. Two corner brackets (92) are respectively provided on the side of the two locking strips (91) that are close to each other along their length. The corner brackets (92) are slidably mounted on the corresponding locking strips (91) along their length, and each of the two right-angled sides of the corner brackets (92) has a locking hole (921) with its axis perpendicular to the side it is on. (91) A locking groove (911) is provided on one side that is close to each other along its length. One right angle side of the corner bracket (92) is parallel to and fits against the corresponding locking strip (91), and its position on the locking strip (91) is fixed by a locking screw that cooperates with the corresponding locking hole (921) and locking groove (911). Two corner brackets (92) located on the same locking strip (91) are perpendicular to the right angle side of the locking strip (91) and close to each other, and are fixedly connected to the experimental instrument by a locking screw that cooperates with the corresponding locking hole (921).

7. A marine-grade fume hood according to claim 6, characterized in that: A rotating disk (93) with its axis vertically set and passing through the center of the platform (11) is rotatably mounted on the platform (11). Two locking strips (91) are synchronously and oppositely slidably mounted on the rotating disk (93) along a direction perpendicular to their length. The length of the locking strip (91) is less than the distance between the glass window (15) and the back plate (12). The rotating disk is provided with an adjustment groove (94) set along the length of the locking strip (91). The locking strip (91) is provided with an adjustment block (912) slidably mounted in the adjustment groove (94). An adjustment screw (95) set along its length and connected to an adjustment motor (96) at one end is also rotatably mounted in the adjustment groove (94). The adjustment screw (95) is threadedly connected to the two adjustment blocks (912), and the threads of the two adjustment blocks (912) are opposite in direction.

8. A marine-grade fume hood according to claim 1, characterized in that: The bottom of the two side plates (1) is provided with inserts (17) arranged along their width direction. The ship is fixed with a mounting plate (2) located below the platform (11) and with its upper surface horizontal. The mounting plate (2) is provided with slots (21) that cooperate with the corresponding inserts (17). There are two locking strips (22) that are parallel to and perpendicular to the mounting plate (2) between the two slots (21). The locking strips (22) are close to the corresponding slots (21). The locking strips (22) and the side plates (1) are provided with locking holes (23) that cooperate with each other. The locking holes (23) are arranged horizontally perpendicular to the side plates (1), and there are several sets of locking holes (23) along the length direction of the locking strips (22).

9. A marine-grade fume hood according to claim 1, characterized in that: The two side panels (1) are fitted with inner lining plates (18) on the side close to each other, the back panel (12) is fitted with inner lining plates (15) on the side close to the glass window (15), and the top panel (13) is fitted with inner lining plates (18) on the side close to the table (11). The inner lining plates (18) are made of 316L stainless steel.

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