Multi-sealing leakproof structure of ultra-clean HDPE (high-density polyethylene) barrel

Abstract

The invention relates to the technical field of ultra-clean HDPE (high-density polyethylene) barrels, and particularly discloses a multi-sealing anti-leakage structure of an ultra-clean HDPE barrel. The upper surface of the barrel body is communicated with a connecting pipe, and the tail end of the connecting pipe is provided with a pressure balancing assembly used for balancing the pressure in the barrel. By means of the arranged pressure balancing assembly, high-pressure gas can push a sealing block to move vertically through a fixing plate on an exhaust part, the gas is exhausted through a gap between the sealing block and the exhaust part and is exhausted to the outside through a through hole in the exhaust part, the automatic pressure relief effect is achieved, and when an adjusting screw is screwed, under the cooperation of a fixing bearing, the sealing block is not prone to falling off. The adjusting part can be driven to move in the vertical direction, the distance between the guide sleeve and the sealing block can be adjusted, then the tension of the compression spring is adjusted, when the pressure of the barrel body is small, the pressure cannot be exhausted through the exhaust part, the sealing block can only be pushed through large pressure, and then automatic pressure relief of different materials can be conveniently achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of super-clean HDPE barrels, in particular to a multi-sealing anti-leakage structure of a super-clean HDPE barrel. BACKGROUND

[0002] The sealing of a super-clean HDPE barrel is a professional sealing system designed for the storage / transport of high-purity liquids such as medical liquids, electronic-grade solvents, and biological reagents in the super-clean field of medicine, semiconductors, and electronic chemicals. It not only realizes the basic function of "leakage prevention" of ordinary HDPE barrels, but also, through the synergistic design of materials, structure, and process, additionally meets the stringent requirements of "low pollution and high cleanliness", avoiding liquid leakage, external impurity intrusion, or ion and particle precipitation from the barrel body / sealing element itself, which damages the purity of the contents.

[0003] The patent with publication number CN120553265A discloses an HDPE super-clean barrel and its sealing structure, which includes a water outlet on the sealed barrel body, a conical barrel cover is arranged inside the water outlet, and the water outlet and the conical barrel cover are in mutual contact. It also includes at least two connecting rods supporting the conical barrel cover, which are fixedly connected between the connecting rods and the conical barrel cover. An elastic pulling mechanism is sleeved outside the connecting rod and is used to pull the connecting rod downward to make the conical barrel cover tightly fit the water outlet. A liquid collecting mechanism is also included. Through the structural design of the elastic pulling mechanism and the conical barrel cover, the elastic pulling mechanism continuously applies a downward pulling force to drive the connecting rod to move the conical barrel cover towards the water outlet. When the initial contact surface is compressed due to aging, the elastic pulling mechanism drives the conical barrel cover to move downward as a whole, and the unattached area synchronously replaces the aging interface to ensure that the barrel cover and the water outlet are always in close contact, effectively avoiding the sealing gap and significantly improving the sealing performance of liquid storage.

[0004] The patent with publication number CN209634895U discloses an industrial waste salt landfill packaging barrel and sealing structure. The packaging barrel structure includes a barrel body, a barrel cover, a clamp, and a cap. The sealing structure includes a sealing skeleton layer, a sealing filler layer, and a barrel cover sealing layer. It uses an open barrel, which has high work efficiency. The packaging barrel uses a skeleton filling, asphalt filler sealing, and clamp to tightly seal the barrel cover, which has good sealing effect. The HDPE cap of the clamp is welded and sealed to prevent corrosion and ensure service life.

[0005] The patent with the publication number CN208994212U discloses an HDPE material plastic bucket, which comprises a bucket body and a handle, the bottom of the bucket body is fixedly connected with a bottom plate, the bucket body is sleeved with a protective sleeve, a plurality of buffer springs are fixedly connected between the protective sleeve and the bucket body, a circular ring is fixedly connected to the top of the inner wall of the bucket body, a bucket cover is installed on the top of the bucket body, the handle is horizontally located above the bucket cover, an annular insertion slot matched with the bucket body is formed in the bucket cover, a sealing washer is installed on the top of the inner wall of the annular insertion slot, and insertion rods are fixedly connected to the bottom of the handle on both sides.

[0006] Although the existing patent discloses a sealing structure through the structural design of the elastic pulling mechanism and the conical bucket cover or the clamping of the bucket cover by the clamp, in the process of storing and transporting the ultrapure chemicals in the ultraclean HDPE bucket, the pressure in the bucket is prone to fluctuate obviously due to the influence of factors such as the temperature difference between day and night, the temperature fluctuation in the transportation process or the volatilization of the chemicals themselves. When a large pressure difference is generated between the inside and outside of the bucket, the positive pressure is easy to force the sealing structure to deform or even break, thereby causing the leakage of the ultrapure chemicals, and the negative pressure is easy to cause the separation of the sealing surface, so it is difficult to guarantee the safety and purity requirements of the ultrapure chemicals in storage and transportation. SUMMARY

[0007] The purpose of the present application is to provide a multiple sealing and anti-leakage structure of an ultraclean HDPE bucket. When the gas with a higher pressure pushes the sealing block vertically through the fixed plate on the exhaust member, the gas is discharged through the gap between the sealing block and the exhaust member and then discharged to the outside through the through hole on the exhaust member, so as to realize the automatic pressure relief function. When the adjusting screw is twisted, the adjusting member can be driven to move vertically under the cooperation of the fixed bearing, the distance between the guide sleeve and the sealing block can be adjusted, and then the tension of the compression spring can be adjusted, so that the pressure in the bucket body cannot be discharged through the exhaust member, but only the sealing block can be pushed by a larger pressure, thereby facilitating the automatic pressure relief of different materials, so as to solve the problems in the above background art.

[0008] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a multiple sealing and anti-leakage structure of an ultraclean HDPE bucket, comprising a bucket body, a connecting pipe is communicated with the upper surface of the bucket body, a pressure balance assembly for balancing the pressure in the bucket is arranged at the end of the connecting pipe, a filter assembly for filtering air is arranged in the pressure balance assembly, and a sealing assembly for sealing is arranged at the upper end of the bucket body. The pressure balance assembly comprises a pressure balance piece which is communicated at the end of the connecting pipe and fixedly connected with the barrel body, an air inlet piece is communicated at the upper end of the pressure balance piece, an air outlet piece is arranged at the right side of the air inlet piece and communicated with the pressure balance piece, fixed plates are fixed on the inner walls of the air outlet piece and the air inlet piece, two guide rods are fixed on one side of the fixed plates, sealing blocks are slidably connected on the outer surfaces of the two guide rods, and compression springs are abutted against the side walls of the sealing blocks.

[0009] Preferably, the ends of one of the compression springs are abutted against an adjusting piece, a fixed bearing is inlaid on the inner wall of the adjusting piece, and an adjusting screw is fixed in the fixed bearing and the adjusting screw.

[0010] Preferably, two guide sleeves are integrally fixed on the outer surface of the adjusting piece and sleeved on the guide rods, and two through holes are formed at one end of the air outlet piece.

[0011] Preferably, the filter assembly comprises a first filter screen which is horizontally arranged in the pressure balance piece, and an activated carbon plate which is arranged above the first filter screen.

[0012] Preferably, a second filter screen is arranged above the activated carbon plate, and connecting plates are fixed at the two ends of the second filter screen, the activated carbon plate and the first filter screen.

[0013] Preferably, a fixed block which is integrally fixed with the inner wall of the pressure balance piece is slidably connected on one side of the connecting plate, and a movable plate which is detachably connected with the pressure balance piece is fixed at the front end of the connecting plate.

[0014] Preferably, the sealing assembly comprises an outer barrel opening which is communicated at the upper end of the barrel body, an inner barrel opening which is integrally fixed on the inner wall of the outer barrel opening, a barrel cover which is movably connected at the upper end of the inner barrel opening, and four limiting pieces which are fixed on the lower surface of the barrel cover in a symmetrical manner.

[0015] Preferably, limiting grooves which are formed on the outer barrel opening are insertedly connected at the lower ends of the four limiting pieces, mounting holes are formed in the inner walls of the four limiting pieces, limiting blocks are inserted in the mounting holes, and movable rods which are telescopically connected with the outer barrel opening are fixed on the upper surfaces of the limiting blocks.

[0016] Preferably, limiting springs which are abutted and connected with the outer barrel opening are sleeved on the outer surfaces of the movable rods, fixed pieces which are slidably connected with the outer barrel opening are fixed on the upper surfaces of the movable rods, and mounting sleeves which are sleeved on the outer barrel opening are fixed at the ends of the fixed pieces.

[0017] Preferably, the lower end of the bucket cover is provided with a sealing groove matched with the inner bucket opening, a rubber gasket is arranged in the sealing groove, and an air bag is connected to the upper surface of the rubber gasket, and the upper end of the air bag is communicated with a flow cavity formed in the inner wall of the bucket cover.

[0018] Compared with the prior art, the present application has the following advantages: 1. The higher pressure gas pushes the sealing block vertically through the fixed plate on the exhaust member, and the gas is discharged through the gap between the sealing block and the exhaust member and then through the through hole on the exhaust member to the outside, thereby achieving the automatic pressure relief function. When the adjusting screw is twisted, the adjusting member is vertically moved under the cooperation of the fixed bearing, the distance between the guide sleeve and the sealing block is adjusted, the tension of the compression spring is adjusted, the barrel pressure is too small to be discharged through the exhaust member, and only the higher pressure can push the sealing block, thereby facilitating the automatic pressure relief of different materials. 2. The gas enters the pressure balancing member through the connecting pipe, and then passes through the first filter screen, the activated carbon plate and the second filter screen to filter the impurities in the gas. The connecting plate on the filter assembly is used to detach the movable plate from the pressure balancing member under the cooperation of the fixed block, so that the filter assembly can be disassembled and replaced. 3. The sealing assembly is provided. During the self-elongation and reset of the limiting spring, the limiting block is reset, the limiting block is inserted into the mounting hole on the limiting member, the limiting block is compressed, the sealing groove in the bucket cover is in contact with the upper surface of the inner bucket opening, the rubber gasket is used to realize the sealing function, and the elasticity of the limiting spring tightly pushes the limiting member, the rubber gasket is extruded by the bucket cover, the auxiliary sealing is realized, the material in the barrel generates positive pressure in the internal transportation, the pressure enters the air bag through the flow cavity at the bottom of the bucket cover, the air bag is deformed, the rubber gasket is extruded, and the sealing effect is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the following specific embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 It is the overall structure view of the present application. Figure 2 It is the semi-partial structure schematic view of the pressure balancing member of the present application. Figure 3 It is the semi-partial structure schematic view of the exhaust member of the present application. Figure 4 It is the schematic diagram of the three-dimensional structure of the first filter screen of the application; Figure 5 It is the schematic diagram of the three-dimensional structure of the outer barrel mouth of the application; Figure 6 It is the schematic diagram of the three-dimensional structure of the mounting sleeve of the application; Figure 7 It is the schematic diagram of the half-section structure of the outer barrel mouth of the application; Figure 8 It is the schematic diagram of the half-section structure of the barrel cover of the application.

[0021] Explanation of reference signs: 1, barrel body; 2, connecting pipe; 3, pressure balancing component; 31, air inlet component; 32, air outlet component; 33, fixing plate; 34, guide rod; 35, sealing block; 36, compression spring; 37, adjusting component; 38, fixed bearing; 39, adjusting screw; 310, guide sleeve; 311, through hole; 4, first filter screen; 41, activated carbon plate; 42, second filter screen; 43, connecting plate; 44, fixing block; 45, movable plate; 5, outer barrel mouth; 51, inner barrel mouth; 52, barrel cover; 53, limiting component; 54, limiting groove; 55, mounting hole; 56, limiting block; 57, movable rod; 58, limiting spring; 59, fixing component; 510, mounting sleeve; 511, sealing groove; 512, rubber gasket; 513, air bag; 514, flow cavity. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0023] The application provides a technical solution: Please refer to Figures 1 to 4 A multiple-sealing anti-leakage structure of an ultra-clean HDPE barrel, comprising a barrel body 1, the upper surface of the barrel body 1 being communicated with a connecting pipe 2, the end of the connecting pipe 2 being provided with a pressure balancing assembly for balancing the pressure in the barrel, the inside of the pressure balancing assembly being provided with a filtering assembly for filtering air, and the upper end of the barrel body 1 being provided with a sealing assembly for sealing. The pressure balance assembly comprises a pressure balance piece 3 which is communicated at the end of the connecting pipe 2 and fixedly connected with the barrel 1, the upper end of the pressure balance piece 3 is communicated with an air inlet piece 31, the right side of the air inlet piece 31 is provided with an air outlet piece 32 which is communicated with the pressure balance piece 3, the inner walls of the air outlet piece 32 and the air inlet piece 31 are fixedly provided with fixed plates 33, one side of the fixed plate 33 is fixedly provided with two guide rods 34, the outer surfaces of the two guide rods 34 are slidably connected with sealing blocks 35, the side walls of the sealing blocks 35 abut against pressing springs 36, the end of one pressing spring 36 abuts against an adjusting piece 37, the inner wall of the adjusting piece 37 is inlaid with a fixed bearing 38, the inside of the fixed bearing 38 and an adjusting screw 39 is fixedly provided with the adjusting screw 39 which is screwed with the air outlet piece 32, the outer surface of the adjusting piece 37 is integrally fixedly provided with two guide sleeves 310 which are sleeved on the guide rods 34, one end of the air outlet piece 32 is provided with two through holes 311.

[0024] By adopting the above technical scheme, the filtered gas enters the air inlet piece 31 and the air outlet piece 32, due to the opposite structure in the air inlet piece 31 and the air outlet piece 32, the gas cannot be discharged through the air inlet piece 31, and the higher pressure gas pushes the sealing block 35 to move vertically through the fixed plate 33 on the air outlet piece 32, the guide rod 34 can play a guiding and limiting role, the gas is discharged through the gap between the sealing block 35 and the air outlet piece 32, and then discharged to the outside through the through hole 311 on the air outlet piece 32, so as to realize the automatic pressure relief function, and when the adjusting screw 39 is screwed, the adjusting piece 37 can be driven to move vertically under the cooperation of the fixed bearing 38, the guide sleeve 310 can guide the adjusting piece 37, the distance between the guide sleeve 310 and the sealing block 35 can be adjusted, and then the tension of the pressing spring 36 can be adjusted, so that the barrel 1 cannot be discharged through the air outlet piece 32 when the pressure is small, and only the sealing block 35 can be pushed by the larger pressure, so as to facilitate the automatic pressure relief of different materials, and when the negative pressure is generated in the barrel 1, the air outside can enter the pressure balance piece 3 through the reverse assembly in the air inlet piece 31 for filtration, and then enter the barrel 1 through the connecting pipe 2, so as to facilitate use.

[0025] Specifically, as shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the filtering assembly comprises a first filter screen 4 which is horizontally installed in the inside of the pressure balance piece 3, an activated carbon plate 41 is installed above the first filter screen 4, a second filter screen 42 is installed above the activated carbon plate 41, two connecting plates 43 are fixedly connected at the two ends of the second filter screen 42, the activated carbon plate 41 and the first filter screen 4, one side of the connecting plate 43 is slidably connected with a fixed block 44 which is integrally fixed with the inner wall of the pressure balance piece 3, the front end of the connecting plate 43 is fixedly connected with a movable plate 45 which is detachably connected with the pressure balance piece 3.

[0026] By adopting the above technical scheme, when the pressure in the barrel body 1 is too large, the gas will enter the pressure balancing piece 3 through the connecting pipe 2, then pass through the first filter screen 4, the activated carbon plate 41 and the second filter screen 42 to filter the impurities in the gas, and through the connecting plate 43 provided on the filter assembly, the movable plate 45 is dismounted from the pressure balancing piece 3 under the cooperation of the fixing block 44, so that the filter assembly can be dismounted and replaced.

[0027] Specifically, as shown in Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8 , the sealing assembly comprises an outer barrel mouth 5 which is communicated at the upper end of the barrel body 1, the inner wall of the outer barrel mouth 5 is integrally fixed with an inner barrel mouth 51, the upper end of the inner barrel mouth 51 is movably connected with a barrel cover 52, the lower surface of the barrel cover 52 is symmetrically fixed with four limiting pieces 53, the lower end of each of the four limiting pieces 53 is insertedly connected with a limiting groove 54 provided on the outer barrel mouth 5, the inner wall of each of the four limiting pieces 53 is provided with a mounting hole 55, the inside of the mounting hole 55 is inserted with a limiting block 56, the upper surface of the limiting block 56 is fixed with a movable rod 57 which is telescopically connected with the outer barrel mouth 5, the outer surface of the movable rod 57 is sleeved with a limiting spring 58 which is abuttingly connected with the outer barrel mouth 5, the upper surface of the movable rod 57 is fixed with a fixing piece 59 which is slidingly connected with the outer barrel mouth 5, the distal end of the fixing piece 59 is fixed with a mounting sleeve 510 which is sleeved outside the outer barrel mouth 5, the lower end inside the barrel cover 52 is provided with a sealing groove 511 which is matched with the inner barrel mouth 51, the inside of the sealing groove 511 is mounted with a rubber gasket 512, the upper surface of the rubber gasket 512 is connected with an air bag 513, the upper end of the air bag 513 is communicated with a flow cavity 514 provided in the inner wall of the barrel cover 52.

[0028] By adopting the above technical scheme, the barrel body 1 is placed in a suitable position, the barrel body 1 is filled with the material to be stored through the outer barrel opening 5 and the inner barrel opening 51 arranged on the barrel body 1, after the filling is completed, the sealing groove 511 on the barrel cover 52 is aligned with the inner barrel opening 51, at the same time, the limiting piece 53 on the barrel cover 52 is aligned with the limiting groove 54 on the outer barrel opening 5, then the barrel cover 52 is placed in the vertical direction, the limiting piece 53 on the barrel cover 52 is inserted into the limiting groove 54, the mounting sleeve 510 is manually pulled in the vertical direction, and then the fixed piece 59 is driven to move, so that the movable rod 57 synchronously drives the limiting block 56 at the bottom to move upward, at this time, the barrel cover 52 is rotated, the end of the limiting piece 53 is clamped into the limiting groove 54, then the mounting sleeve 510 is manually loosened, in the process of self-lengthening reset of the limiting spring 58, the limiting block 56 is pushed to reset, so that the limiting block 56 is inserted into the mounting hole 55 on the limiting piece 53, and then the limiting block 56 is compressed, so that the sealing groove 511 in the barrel cover 52 is in complete contact with the upper surface of the inner barrel opening 51, under the cooperation of the rubber gasket 512, the sealing effect can be realized, and the elasticity of the limiting spring 58 itself tightly pushes the limiting piece 53, so that the barrel cover 52 extrudes the rubber gasket 512, the auxiliary sealing is realized, when the material transportation inside the barrel body 1 generates a positive pressure, the pressure enters the air bag 513 through the flow cavity 514 at the bottom of the barrel cover 52, so that the air bag 513 is deformed, and then the rubber gasket 512 is extruded, and the sealing effect is further improved, so that when the internal pressure increases, the good sealing effect is still realized.

[0029] Working principle: through the barrel body 1 set up the outer barrel mouth 5 and the inner barrel mouth 51, to the barrel body 1 fills the material that needs to store, fills the completion, the sealing groove 511 on the barrel cover 52 is aligned with the inner barrel mouth 51, while the limiting piece 53 on the barrel cover 52 is aligned with the limiting groove 54 on the outer barrel mouth 5, then vertically direction puts down the barrel cover 52, the limiting piece 53 on the barrel cover 52 inserts into the limiting groove 54, vertically direction pulls the mounting sleeve 510, and then drives the fixed part 59 movement, so that the movable rod 57 synchronously drives the bottom limiting block 56 to move upward, at this time, the barrel cover 52 is rotated, so that the end of the limiting piece 53 is clamped into the limiting groove 54, then manually loosen the mounting sleeve 510, in the process of the limiting spring 58 self-stretching reset, it will push the limiting block 56 to reset, so that the limiting block 56 is inserted into the mounting hole 55 on the limiting piece 53, and then the limiting block 56 is pressed tightly, so that the sealing groove 511 in the barrel cover 52 is in contact with the upper surface of the inner barrel mouth 51, and under the cooperation of the rubber gasket 512, the sealing effect can be realized, and the elasticity of the limiting spring 58 itself will tightly push the limiting piece 53, so that the barrel cover 52 extrudes the rubber gasket 512, when the internal transportation of the material in the barrel body 1 generates positive pressure, the pressure will enter the air bag 513 through the flow cavity 514 at the bottom of the barrel cover 52, so that the air bag 513 is deformed, and then extrudes the rubber gasket 512, further improves the sealing effect, realizes the good sealing effect when the internal pressure increases, when the pressure in the barrel body 1 is too large, the gas will enter the pressure balancing part 3 through the connecting pipe 2, then pass through the first filter screen 4, the activated carbon plate 41 and the second filter screen 42, and filter the impurities in the gas, through the connecting plate 43 provided on the filter assembly, under the cooperation of the fixed block 44, the movable plate 45 is removed from the pressure balancing part 3, so that the filter assembly can be disassembled and replaced, the filtered gas will enter the air inlet part 31 and the air outlet part 32, because the structure of the air inlet part 31 and the air outlet part 32 is opposite, the gas cannot be discharged through the air inlet part 31, and the gas with high pressure will push the sealing block 35 vertically through the fixed plate 33 on the air outlet part 32, so that the gas is discharged through the gap between the sealing block 35 and the air outlet part 32, and then discharged outside through the through hole 311 on the air outlet part 32, realizing the automatic pressure relief effect, and by rotating the adjusting screw 39, under the cooperation of the fixed bearing 38, the adjusting part 37 can be moved vertically, the guide sleeve 310 can guide the adjusting part 37, the distance between the guide sleeve 310 and the sealing block 35 can be adjusted, the tension of the compression spring 36 can be adjusted, so that the barrel body 1 cannot be discharged through the air outlet part 32 when the pressure is small, only the high pressure can push the sealing block 35, and then the automatic pressure relief of different materials can be realized, when the negative pressure is generated in the barrel body 1, the external air will enter the pressure balancing part 3 through the reverse assembly in the air inlet part 31 for filtering, and then enter the barrel body 1 through the connecting pipe 2.

[0030] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A multi-layered sealing and leak-proof structure for an ultra-clean HDPE drum, comprising: The barrel (1) is characterized in that: the upper surface of the barrel (1) is connected to a connecting pipe (2), the end of the connecting pipe (2) is provided with a pressure balancing component for balancing the pressure inside the barrel, the interior of the pressure balancing component is provided with a filter component for filtering air, and the upper end of the barrel (1) is provided with a sealing component for sealing. The pressure balancing assembly includes a pressure balancing component (3), which is connected to the end of the connecting pipe (2) and fixedly connected to the barrel body (1). The upper end of the pressure balancing component (3) is connected to an air inlet (31). The right side of the air inlet (31) is provided with an exhaust component (32) that is connected to the pressure balancing component (3). The inner walls of the exhaust component (32) and the air inlet (31) are both fixed with a fixing plate (33). Two guide rods (34) are fixed on one side of the fixing plate (33). The outer surfaces of the two guide rods (34) are slidably connected with sealing blocks (35). The side wall of the sealing block (35) abuts against a compression spring (36).

2. The multi-seal leak-proof structure of an ultra-clean HDPE bucket according to claim 1, characterized in that: An adjusting member (37) is abutted at the end of one of the compression springs (36). A fixed bearing (38) is embedded in the inner wall of the adjusting member (37). An adjusting screw (39) that is threadedly connected to the exhaust member (32) is fixed inside the fixed bearing (38) and the adjusting screw (39).

3. The multi-seal leak-proof structure of an ultra-clean HDPE bucket according to claim 2, characterized in that: The outer surface of the adjusting component (37) is integrally fixed with two guide sleeves (310) sleeved on the guide rod (34), and one end of the exhaust component (32) has two through holes (311).

4. The multi-seal leak-proof structure of an ultra-clean HDPE bucket according to claim 3, characterized in that: The filter assembly includes a first filter screen (4), which is horizontally installed inside the pressure balancer (3), and an activated carbon plate (41) is installed above the first filter screen (4).

5. The multi-seal leak-proof structure of an ultra-clean HDPE bucket according to claim 4, characterized in that: A second filter screen (42) is installed above the activated carbon plate (41), and connecting plates (43) are fixed at both ends of the second filter screen (42), the activated carbon plate (41) and the first filter screen (4).

6. The multi-seal leak-proof structure of an ultra-clean HDPE bucket according to claim 5, characterized in that: A fixing block (44) is slidably connected to one side of the connecting plate (43) and is integrally fixed to the inner wall of the pressure balancer (3). A movable plate (45) is fixed to the front end of the connecting plate (43) and is detachably connected to the pressure balancer (3).

7. The multi-seal leak-proof structure of an ultra-clean HDPE bucket according to claim 6, characterized in that: The sealing assembly includes an outer barrel opening (5), which is connected to the upper end of the barrel body (1). An inner barrel opening (51) is integrally fixed to the inner wall of the outer barrel opening (5). A barrel lid (52) is movably connected to the upper end of the inner barrel opening (51). Four limiting members (53) are symmetrically fixed to the lower surface of the barrel lid (52).

8. The multi-seal leak-proof structure of an ultra-clean HDPE bucket according to claim 7, characterized in that: The lower ends of the four limiting members (53) are all connected to limiting grooves (54) opened on the outer barrel opening (5). The inner walls of the four limiting members (53) are all provided with mounting holes (55). A limiting block (56) is inserted into the inside of the mounting hole (55). A movable rod (57) that is telescopically connected to the outer barrel opening (5) is fixed on the upper surface of the limiting block (56).

9. The multi-seal leak-proof structure of an ultra-clean HDPE bucket according to claim 8, characterized in that: The outer surface of the movable rod (57) is fitted with a limiting spring (58) that abuts against the outer barrel opening (5). The upper surface of the movable rod (57) is fixed with a fixing member (59) that slides against the outer barrel opening (5). The end of the fixing member (59) is fixed with an installation sleeve (510) that is fitted outside the outer barrel opening (5).

10. The multi-seal leak-proof structure of an ultra-clean HDPE bucket according to claim 9, characterized in that: The lower end of the inside of the bucket lid (52) is provided with a sealing groove (511) that matches the inner bucket opening (51). A rubber gasket (512) is installed inside the sealing groove (511). An airbag (513) is connected to the upper surface of the rubber gasket (512). The upper end of the airbag (513) is connected to a flow cavity (514) opened on the inner wall of the bucket lid (52).

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