Free falling type lifeboat frame spraying system

Abstract

The invention relates to the technical field of fire safety of ship lifesaving systems, and discloses a free-falling type lifeboat frame spraying system which solves the problem that people cannot escape due to the fact that an existing lifeboat and an existing lifeboat frame are prone to being damaged by fire disasters, the free-falling type lifeboat frame spraying system comprises a lifeboat frame, a spraying mechanism is arranged on the lifeboat frame, and a water conveying mechanism is arranged on the spraying mechanism. The spraying mechanism comprises a U-shaped frame fixed above the boat frame, and two rotating shafts are symmetrically and rotationally connected to the outer side of the U-shaped frame; according to the device, through cooperation between a motor and a driving shaft and cooperation between a driving gear and a driven gear, a driven shaft can conveniently drive a rotating disc to rotate, and through cooperation between a second movable rod and a sliding block and cooperation between a first L-shaped round rod and a first movable rod, an L-shaped plate can conveniently slide back and forth along the second L-shaped round rod; and through cooperation of a toothed plate, an outer gear, a rotating shaft and a support, the hard pipe can rotate in a reciprocating mode conveniently to spray the lifeboat and the boat frame in all directions, and therefore the lifeboat and the boat frame are prevented from being damaged due to fire disasters.

Description

Technical Field

[0001] The invention belongs to the technical field of fire safety of ship lifesaving systems, and in particular relates to a free-falling lifeboat davit spray system. Background Art

[0002] As the last guarantee for the safety of crew members or passengers at sea, all seagoing vessels are required to install life-saving equipment (including lifeboats and lifeboat racks) that meet the needs of the crew. The role of the lifeboat is to escape from the wrecked mother ship, search and rescue people who fall into the water, and assemble life rafts, etc., all of which are to save the lives of people in distress at sea. The implementation of the launch (escape) and recovery (rescue) of the lifeboat must be completed by the corresponding lifeboat rack. Therefore, the reliability of the performance of the life-saving system (including lifeboats and lifeboat racks) is directly related to the life safety of people in distress.

[0003] However, the lifeboat and lifeboat davit themselves lack a fire-fighting system. When a fire occurs, personnel cannot get close to the lifeboat davit, making the lifeboat and davit easily damaged by the fire, thus preventing personnel from escaping. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a free-falling lifeboat davit spray system, which effectively solves the problem that the lifeboat and davit are easily damaged by fire, resulting in the inability of people to escape.

[0005] To achieve the above object, the present invention provides the following technical solutions: A free-fall lifeboat davit spray system, comprising a davit, a spray mechanism is provided on the davit, and a water delivery mechanism is provided on the spray mechanism;

[0006] The spray mechanism includes a U-shaped frame fixed above the cradle, the outer side of the U-shaped frame is symmetrically connected to two rotating shafts, the outer sides of the two rotating shafts are fixedly sleeved with brackets, the outer sides of the two brackets are fixedly installed with hard pipes, and multiple nozzles are evenly spaced on the sides of the two hard pipes close to each other. Two fixed blocks are symmetrically fixedly connected to the cradle, and the ends of the two rotating shafts away from the U-shaped frame are respectively rotatably connected to the two fixed blocks, the outer sides of the two hard pipes are fixedly connected with hoses, and a water pipe is fixedly connected between the two hoses.

[0007] Preferably, two L-shaped round rods 2 are symmetrically fixedly connected to the inner side of the U-shaped frame, and L-shaped plates are movably sleeved on the outer sides of the two L-shaped round rods 2. Abutment wheels that fit the U-shaped frame are installed on the two L-shaped plates, and toothed plates are fixedly installed on the outer sides of the two L-shaped plates. External gears are fixedly installed on the outer sides of the two rotating shafts, and the two external gears are respectively meshed with the two toothed plates.

[0008] Preferably, an inner plate is fixedly installed on the inner side of the U-shaped frame, and two bottom blocks are symmetrically fixedly connected to the bottom of the inner plate, an L-shaped round rod is fixedly connected between the sides of the two bottom blocks close to each other and the bottom of the inner plate, sliders are movably sleeved on the outer sides of the two L-shaped round rods, and the bottoms of the two sliders are rotatably connected to movable rods, and the bottom ends of the two movable rods are rotatably connected to the two L-shaped plates respectively.

[0009] Preferably, two driven shafts are symmetrically rotatably connected to the inner top wall of the U-shaped frame, the bottom ends of the two driven shafts are fixedly connected to a rotating disk, and the two driven shafts pass through the inner plate and are rotatably connected to the inner plate, the bottoms of the two rotating disks are rotatably connected to two movable rods, and the ends of the two movable rods that are away from each other are rotatably connected to two sliders respectively.

[0010] Preferably, a motor is fixedly mounted on the inner top wall of the U-shaped frame, a driving shaft located between the two driven shafts is fixedly connected to the motor, the bottom end of the driving shaft is rotatably connected to the top of the inner plate, a driving gear is fixedly mounted on the outer side of the driving shaft, and driven gears are fixedly mounted on the outer sides of the two driven shafts, and the two driven gears are meshed and connected with the driving gear.

[0011] Preferably, the water delivery mechanism includes a filter frame fixed to one end of the water delivery pipe, a side of the filter frame away from the water delivery pipe is fixedly connected to a pumping pipe, a fixing component is provided at the bottom of the filter frame, a V-shaped plate is fixedly installed inside the filter frame, a plurality of filter holes are evenly arranged on the V-shaped plate, an opening is provided at the bottom of the filter frame, an inclined plate is fixedly installed on the inner bottom wall of the filter frame, and the opening is located between the inclined plate and the V-shaped plate.

[0012] Preferably, two inner rods are symmetrically fixedly connected between the side of the V-shaped plate away from the water suction pipe and the filter frame, a slide plate is movably sleeved between the two inner rods, a plurality of dredging rods are evenly and fixedly connected to the side of the slide plate close to the V-shaped plate, the outer diameter of the dredging rods is equal to the inner diameter of the filter holes, and the dredging rods correspond to the filter holes one by one, and two springs are symmetrically fixedly connected between the side of the slide plate away from the V-shaped plate and the filter frame, and the two springs are respectively sleeved on the outsides of the two inner rods.

[0013] Preferably, the filter frame is rotatably connected to a drive shaft inside, one end of the drive shaft extends to the outside of the filter frame and is fixedly connected to a handwheel, a sealed bearing is provided on the outside of the filter frame, the sealed bearing is sleeved on the outside of the drive shaft, an eccentric block is fixedly sleeved on the outside of the drive shaft, the eccentric block is located inside the filter frame, and the eccentric block is located on the side of the slide away from the dredging rod.

[0014] Preferably, the fixing assembly includes a bottom plate located at the bottom of the filter frame, a rubber ring and a sealing plate are fixedly connected to the top of the bottom plate, the rubber ring is sleeved on the outside of the sealing plate and fits with the bottom of the filter frame, the sealing plate is inserted into the opening, and the bottom of the filter frame is symmetrically fixedly connected with two screws, the bottom plate is sleeved on the outside of the two screws, and two nuts are symmetrically provided at the bottom of the bottom plate, and the two nuts are respectively threadedly sleeved on the outside of the two screws.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The present invention facilitates the water to be sprayed out from each nozzle through the cooperation between the water pipe, the hose and the hard pipe, and then can spray the lifeboat and the cradle to achieve the fire-fighting and cooling effects. The cooperation between the motor and the driving shaft and the driving gear and the driven gear facilitates the driven shaft to drive the rotating disk to rotate. The cooperation between the movable rod 2 and the slider and the L-shaped round rod 1 and the movable rod 1 facilitates the L-shaped plate to slide back and forth along the L-shaped round rod 2. The cooperation between the tooth plate and the external gear and the rotating shaft and the bracket facilitates the reciprocating rotation of the hard pipe to spray the lifeboat and the cradle in all directions, thereby preventing the lifeboat and the cradle from being damaged by fire.

[0017] (2) The invention facilitates the filtering of spray water through the cooperation between the water pipe and the filter frame, and between the V-shaped plate and the filter hole. The cooperation between the hand wheel, the drive shaft and the eccentric block facilitates the sliding of the slide plate along the two inner rods, so that the clearing rod can move horizontally to clear the filter hole, thereby avoiding blockage of the filter hole.

[0018] (3) The invention facilitates the disassembly and assembly of the sealing plate through the cooperation between the bottom plate, the screw rod and the nut, and then enables the filtered impurities to be discharged from the opening, thereby facilitating the collection and treatment of the impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0020] In the attached picture:

[0021] Figure 1 It is a schematic diagram of the spray structure of the free-fall lifeboat davit of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the spray mechanism of the present invention;

[0023] Figure 3 This is a schematic diagram of the U-shaped frame structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the water delivery mechanism of the present invention;

[0025] Figure 5 It is a partial cross-sectional structural schematic diagram of the filter frame of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the skateboard of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the fixing component of the present invention.

[0028] In the figure: 1, davit; 2, spray mechanism; 201, U-shaped frame; 202, water pipe; 203, hose; 204, bracket; 205, rotating shaft; 206, fixed block; 207, hard pipe; 208, nozzle; 209, L-shaped plate; 2010, movable rod 1; 2011, movable rod 2; 2012, driving shaft; 2013, rotating disk; 2014, inner plate; 2015, slider; 2016, driven shaft; 2017, motor; 2018, driving gear; 2019, driven gear; 2020, L-shaped round rod 1; 2021, bottom block; 2022, L-shaped round Rod 2; 2023, abutment wheel; 2024, external gear; 2025, tooth plate; 3, water delivery mechanism; 301, filter frame; 302, fixing assembly; 3021, bottom plate; 3022, screw; 3023, nut; 3024, rubber ring; 3025, sealing plate; 303, suction pipe; 304, filter hole; 305, inclined plate; 306, opening; 307, V-shaped plate; 308, slide plate; 309, inner rod; 3010, dredging rod; 3011, hand wheel; 3012, sealed bearing; 3013, drive shaft; 3014, eccentric block; 3015, spring. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Embodiment 1, by Figure 1-Figure 7 It is given that the present invention comprises a cradle 1, on which a spray mechanism 2 is provided, and on which a water delivery mechanism 3 is provided.

[0031] Embodiment 2, on the basis of embodiment 1, the spray mechanism 2 includes a U-shaped frame 201 fixed on the top of the scaffold 1, the outer side of the U-shaped frame 201 is symmetrically connected to two rotating shafts 205, the outer sides of the two rotating shafts 205 are fixedly sleeved with brackets 204, the outer sides of the two brackets 204 are fixedly installed with hard pipes 207, and the sides of the two hard pipes 207 close to each other are evenly spaced and provided with a plurality of spray heads 208, the scaffold 1 is symmetrically fixedly connected to two fixed blocks 206, the ends of the two rotating shafts 205 away from the U-shaped frame 201 are respectively rotatably connected to the two fixed blocks 206, the outer sides of the two hard pipes 207 are fixedly connected with hoses 203, and the two hoses 20 3 is fixedly connected with a water pipe 202, two L-shaped round rods 2022 are symmetrically fixedly connected to the inner side of the U-shaped frame 201, and the outer sides of the two L-shaped round rods 2022 are movably sleeved with L-shaped plates 209, and the two L-shaped plates 209 are installed with abutment wheels 2023 that fit with the U-shaped frame 201, and the outer sides of the two L-shaped plates 209 are fixedly installed with toothed plates 2025, and the outer sides of the two rotating shafts 205 are fixedly installed with external gears 2024, and the two external gears 2024 are respectively meshed with the two toothed plates 2025. An inner plate 214 is fixedly installed on the inner side of the U-shaped frame 201, and the bottom of the inner plate 214 is symmetrically fixedly connected with two bottom blocks 2 021, an L-shaped round rod 2020 is fixedly connected between the side of the two bottom blocks 2021 close to each other and the bottom of the inner plate 2014, and the outer sides of the two L-shaped round rods 2020 are movably sleeved with sliders 2015, and the bottoms of the two sliders 2015 are rotatably connected with movable rods 2010, and the bottom ends of the two movable rods 2010 are rotatably connected with the two L-shaped plates 209 respectively. Two driven shafts 2016 are symmetrically rotatably connected on the inner top wall of the U-shaped frame 201, and the bottom ends of the two driven shafts 2016 are fixedly connected with a rotating disk 2013, and the two driven shafts 2016 pass through the inner plate 2014 and are rotatably connected to the inner plate 2014. The bottom of each rotating disk 2013 is rotatably connected with a movable rod 2011, and the ends of the two movable rods 2011 that are away from each other are rotatably connected with two sliders 2015 respectively. A motor 2017 is fixedly installed on the inner top wall of the U-shaped frame 201, and a driving shaft 2012 located between two driven shafts 2016 is fixedly connected to the motor 2017. The bottom end of the driving shaft 2012 is rotatably connected to the top of the inner plate 2014, and a driving gear 2018 is fixedly installed on the outer side of the driving shaft 2012. Driven gears 2019 are fixedly installed on the outer sides of the two driven shafts 2016, and the two driven gears 2019 are meshed and connected with the driving gear 2018.

[0032] First, water is introduced into the water pipe 202, and then the water is sprayed out from each nozzle 208 through the hose 203 and the hard pipe 207 to spray the lifeboat and the cradle 1 to achieve fire fighting and cooling. Then the motor 2017 is started to drive the driving shaft 2012 to rotate, and the driving gear 2018 to rotate. Since the driving gear 2018 is meshed and connected with the driven gear 2019, the driven shaft 2016 is driven to rotate, and the rotating disk 2013 rotates at the same time, and then the slider 2015 is driven along the movable rod 2011. The L-shaped round rod 1 2020 slides back and forth, and then the movable rod 1 2010 drives the L-shaped plate 209 to slide back and forth along the L-shaped round rod 2022. At the same time, the abutment wheel 2023 rolls on the U-shaped frame 201 to ensure the stability of the L-shaped plate 209 when moving. Since the tooth plate 2025 is meshed and connected with the external gear 2024, the rotating shaft 205 is driven to rotate, and the hard pipe 207 is driven to reciprocate through the bracket 204 to spray the lifeboat and the cradle 1 in all directions, finally preventing the lifeboat and the cradle 1 from being damaged by fire.

[0033] Embodiment 3, on the basis of embodiment 1, the water delivery mechanism 3 includes a filter frame 301 fixed to one end of the water delivery pipe 202, the side of the filter frame 301 away from the water delivery pipe 202 is fixedly connected to the water pumping pipe 303, the bottom of the filter frame 301 is provided with a fixing assembly 302, the inside of the filter frame 301 is fixedly installed with a V-shaped plate 307, the V-shaped plate 307 is evenly provided with a plurality of filter holes 304, the bottom of the filter frame 301 is provided with an opening 306, an inclined plate 305 is fixedly installed on the inner bottom wall of the filter frame 301, the opening 306 is located between the inclined plate 305 and the V-shaped plate 307, the side of the V-shaped plate 307 away from the water pumping pipe 303 is symmetrically fixedly connected to the filter frame 301 with two inner rods 309, a slide plate 308 is movably sleeved between the two inner rods 309, and the side of the slide plate 308 close to the V-shaped plate 307 is evenly fixedly connected with a plurality of dredging rods 3 010, the outer diameter of the dredging rod 3010 is equal to the inner diameter of the filter hole 304, and the dredging rod 3010 corresponds to the filter hole 304 one by one, and two springs 3015 are symmetrically fixedly connected between the side of the slide plate 308 away from the V-shaped plate 307 and the filter frame 301, and the two springs 3015 are respectively sleeved on the outside of the two inner rods 309, and the inside of the filter frame 301 is rotatably connected with a drive shaft 3013, one end of the drive shaft 3013 extends to the outside of the filter frame 301 and is fixedly connected with a handwheel 3011, and a sealed bearing 3012 is provided on the outside of the filter frame 301, and the sealed bearing 3012 is sleeved on the outside of the drive shaft 3013, and an eccentric block 3014 is fixedly sleeved on the outside of the drive shaft 3013, and the eccentric block 3014 is located inside the filter frame 301, and the eccentric block 3014 is located on the side of the slide plate 308 away from the dredging rod 3010;

[0034] First, connect the end of the water pumping pipe 303 away from the filter frame 301 to the fire-fighting equipment, so that water passes through the water pumping pipe 303 and the filter frame 301 into the water delivery pipe 202. When the water flows through the filter frame 301, impurities in the water are filtered through the filter hole 304. When the hand wheel 3011 is rotated, the driving shaft 3013 is driven to rotate, and the eccentric block 3014 is driven to rotate so that the slide plate 308 slides along the two inner rods 309. At this time, the two springs 3015 are stretched, and the dredging rod 3010 is horizontally moved and inserted into the filter hole 304 to dredge the filter hole 304 to prevent it from being blocked. Then, the hand wheel 3011 is rotated in the opposite direction to drive the eccentric block 3014 to rotate in the opposite direction and separate from the slide plate 308. At the same time, the slide plate 308 slides along the two inner rods 309 and away from the V-shaped plate 307 under the action of the elastic force of the two springs 3015. At the same time, the dredging rod 3010 is removed from the filter hole 304, and finally the subsequent water flow is realized.

[0035] Embodiment 4, on the basis of embodiment 1, the fixing assembly 302 comprises a bottom plate 3021 located at the bottom of the filter frame 301, a rubber ring 3024 and a sealing plate 3025 are fixedly connected to the top of the bottom plate 3021, the rubber ring 3024 is sleeved on the outside of the sealing plate 3025 and fits with the bottom of the filter frame 301, the sealing plate 3025 is inserted into the opening 306, the bottom of the filter frame 301 is symmetrically fixedly connected with two screw rods 3022, the bottom plate 3021 is sleeved on the outside of the two screw rods 3022, and two nuts 3023 are symmetrically arranged at the bottom of the bottom plate 3021, and the two nuts 3023 are respectively threadedly sleeved on the outside of the two screw rods 3022;

[0036] First, loosen the two nuts 3023 to release the fixation between the bottom plate 3021 and the filter frame 301, then remove the bottom plate 3021 from the bottom of the filter frame 301, and take out the sealing plate 3025 from the opening 306. At this time, the impurities filtered out of the filter frame 301 are discharged from the opening 306 through the guidance of the V-shaped plate 307 and the inclined plate 305, and finally the collection and processing of the impurities are completed.

Claims

1. A free-fall lifeboat davit spray system, comprising a davit (1), characterized in that: The cradle (1) is provided with a spray mechanism (2), and the spray mechanism (2) is provided with a water delivery mechanism (3); The spray mechanism (2) comprises a U-shaped frame (201) fixed on the top of the cradle (1); two rotating shafts (205) are symmetrically rotatably connected on the outer side of the U-shaped frame (201); brackets (204) are fixedly sleeved on the outer sides of the two rotating shafts (205); hard pipes (207) are fixedly installed on the outer sides of the two brackets (204); a plurality of spray heads (208) are evenly spaced and arranged on the sides of the two hard pipes (207) close to each other; two fixed blocks (206) are symmetrically fixedly connected on the cradle (1); the ends of the two rotating shafts (205) away from the U-shaped frame (201) are respectively rotatably connected to the two fixed blocks (206); the outer sides of the two hard pipes (207) are fixedly connected to hoses (203); and a water pipe (202) is fixedly connected between the two hoses (203).

2. A free-fall lifeboat davit spray system according to claim 1, characterized in that: Two L-shaped round rods (2022) are symmetrically fixedly connected to the inner side of the U-shaped frame (201); L-shaped plates (209) are movably sleeved on the outer sides of the two L-shaped round rods (2022); abutment wheels (2023) that fit the U-shaped frame (201) are installed on the two L-shaped plates (209); tooth plates (2025) are fixedly installed on the outer sides of the two L-shaped plates (209); external gears (2024) are fixedly installed on the outer sides of the two rotating shafts (205); and the two external gears (2024) are meshedly connected with the two tooth plates (2025) respectively.

3. A free-fall lifeboat davit spray system according to claim 1, characterized in that: An inner plate (2014) is fixedly installed on the inner side of the U-shaped frame (201); two bottom blocks (2021) are symmetrically fixedly connected to the bottom of the inner plate (2014); an L-shaped round rod (2020) is fixedly connected between the sides of the two bottom blocks (2021) close to each other and the bottom of the inner plate (2014); sliders (215) are movably sleeved on the outer sides of the two L-shaped round rods (2020); the bottoms of the two sliders (2015) are rotatably connected to movable rods (210); and the bottom ends of the two movable rods (210) are rotatably connected to the two L-shaped plates (209), respectively.

4. A free-fall lifeboat davit spray system according to claim 1, characterized in that: Two driven shafts (2016) are symmetrically rotatably connected to the inner top wall of the U-shaped frame (201), the bottom ends of the two driven shafts (2016) are fixedly connected to a rotating disk (2013), and the two driven shafts (2016) pass through the inner plate (2014) and are rotatably connected to the inner plate (2014), and the bottoms of the two rotating disks (2013) are rotatably connected to movable rods (2011), and the ends of the two movable rods (2011) that are away from each other are rotatably connected to two sliders (2015) respectively.

5. A free-fall lifeboat davit spray system according to claim 1, characterized in that: A motor (2017) is fixedly mounted on the inner top wall of the U-shaped frame (201), a driving shaft (2012) located between the two driven shafts (2016) is fixedly connected to the motor (2017), the bottom end of the driving shaft (2012) is rotatably connected to the top of the inner plate (2014), a driving gear (2018) is fixedly mounted on the outer side of the driving shaft (2012), and driven gears (2019) are fixedly mounted on the outer sides of the two driven shafts (2016), and the two driven gears (2019) are meshingly connected to the driving gear (2018).

6. A free-fall lifeboat davit spray system according to claim 1, characterized in that: The water delivery mechanism (3) comprises a filter frame (301) fixed to one end of a water delivery pipe (202); a side of the filter frame (301) away from the water delivery pipe (202) is fixedly connected to a water pumping pipe (303); a fixing assembly (302) is provided at the bottom of the filter frame (301); a V-shaped plate (307) is fixedly installed inside the filter frame (301); a plurality of filter holes (304) are evenly arranged on the V-shaped plate (307); an opening (306) is provided at the bottom of the filter frame (301); an inclined plate (305) is fixedly installed on the inner bottom wall of the filter frame (301); and the opening (306) is located between the inclined plate (305) and the V-shaped plate (307).

7. A free-fall lifeboat davit spray system according to claim 6, characterized in that: Two inner rods (309) are symmetrically fixedly connected between the side of the V-shaped plate (307) away from the water suction pipe (303) and the filter frame (301), a slide plate (308) is movably sleeved between the two inner rods (309), a plurality of dredging rods (3010) are evenly fixedly connected to the side of the slide plate (308) close to the V-shaped plate (307), the outer diameter of the dredging rods (3010) is equal to the inner diameter of the filter hole (304), and the dredging rods (3010) correspond to the filter hole (304) one by one, and two springs (3015) are symmetrically fixedly connected between the side of the slide plate (308) away from the V-shaped plate (307) and the filter frame (301), and the two springs (3015) are respectively sleeved on the outer sides of the two inner rods (309).

8. A free-fall lifeboat davit spray system according to claim 6, characterized in that: The filter frame (301) is rotatably connected to a drive shaft (3013) inside, one end of the drive shaft (3013) extends to the outside of the filter frame (301) and is fixedly connected to a hand wheel (3011), a sealed bearing (3012) is provided on the outside of the filter frame (301), the sealed bearing (3012) is sleeved on the outside of the drive shaft (3013), an eccentric block (3014) is fixedly sleeved on the outside of the drive shaft (3013), the eccentric block (3014) is located inside the filter frame (301), and the eccentric block (3014) is located on a side of the slide plate (308) away from the dredging rod (3010).

9. A free-fall lifeboat davit spray system according to claim 6, characterized in that: The fixing assembly (302) comprises a bottom plate (3021) located at the bottom of the filter frame (301); a rubber ring (3024) and a sealing plate (3025) are fixedly connected to the top of the bottom plate (3021); the rubber ring (3024) is sleeved on the outside of the sealing plate (3025) and fits with the bottom of the filter frame (301); the sealing plate (3025) is inserted into the opening (306); two screw rods (3022) are symmetrically fixedly connected to the bottom of the filter frame (301); the bottom plate (3021) is sleeved on the outside of the two screw rods (3022); two nuts (3023) are symmetrically arranged at the bottom of the bottom plate (3021); the two nuts (3023) are respectively threadedly sleeved on the outside of the two screw rods (3022).

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