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CN-224211552-U - Sealing structure of large-caliber plastic bucket

CN224211552UCN 224211552 UCN224211552 UCN 224211552UCN-224211552-U

Abstract

The utility model discloses a sealing structure of a large-caliber plastic barrel, which comprises a barrel body and a barrel cover which are matched, wherein the barrel body is in threaded connection with the barrel cover, a convex rib is arranged on the barrel cover, a sealing groove matched with the upper edge of the barrel body is formed, a first sealing line is arranged on the inner side of the sealing groove, a second sealing line is arranged at the top of the sealing groove, a third sealing line is arranged on the outer side of the sealing groove, a fixing buckle is arranged on the periphery of the barrel cover, a convex block is arranged on the periphery of the barrel body, and a buckling groove matched with the convex block is formed in the fixing buckle. The novel barrel cover is simple and reasonable in structure, low in manufacturing cost and capable of being recycled, downward pulling force can be generated when the fixing buckle is fastened with the protruding blocks on the periphery of the barrel body, the upper edge of the barrel body enters the sealing groove, three sealing lines are arranged, at least one sealing line is guaranteed to play a role, high sealing requirements are met, and tightness of the barrel cover after the barrel cover is covered with the barrel body is guaranteed.

Inventors

  • LI AOQI
  • LI CHAOHUI
  • GUAN JUNWEN

Assignees

  • 宁波昌祺氟塑料制品有限公司

Dates

Publication Date
20260508
Application Date
20250530

Claims (8)

  1. 1. The utility model provides a seal structure of heavy-calibre plastic drum, includes staving (1) and bung (2) of looks adaptation, characterized by staving (1) and bung (2) threaded connection, bung (2) on set up protruding muscle (21), and form with upper edge looks adaptation's of staving (1) seal groove (22), the inboard of seal groove (22) be provided with first seal line (22 a), the top of seal groove (22) be provided with second seal line (22 b), the outside of seal groove (22) be provided with third seal line (22 c), the periphery of bung (2) be provided with fixed knot (3), the periphery of staving (1) be provided with lug (11), fixed knot (3) be provided with lug (11) looks adaptation's catching groove (3 a).
  2. 2. The sealing structure of a large-caliber plastic bucket as set forth in claim 1, wherein the outer side of the convex rib (21) is an inclined surface (21 a) with the lower end inclined outwards.
  3. 3. The sealing structure of a large-caliber plastic bucket as set forth in claim 2, wherein the lower end of the convex rib (21) is provided with a guiding surface (21 b).
  4. 4. A sealing structure of a large caliber plastic bucket according to claim 3 is characterized in that a handle part (31) is arranged below the buckling groove (3 a) on the fixing buckle (3).
  5. 5. The sealing structure of a large caliber plastic bucket according to claim 4, wherein a protrusion (23) with a circular arc structure is arranged on the outer side of the sealing groove (22), and a third sealing line (22 c) is formed on the top end of the circular arc structure.
  6. 6. The sealing structure of a large-caliber plastic bucket as set forth in claim 5, wherein the number of the fixing buckles (3) is 4-6.
  7. 7. The sealing structure of a large-caliber plastic bucket as set forth in claim 6, characterized in that a bending part (32) is arranged between the fixing buckle (3) and the bucket cover (2).
  8. 8. The sealing structure of a large caliber plastic bucket as set forth in claim 7, wherein a chamfer (11 a) is provided on the outer side of the lower end of the projection (11).

Description

Sealing structure of large-caliber plastic bucket Technical Field The utility model relates to the technical field of plastic bucket sealing, in particular to a sealing structure of a large-caliber plastic bucket. Background The large-caliber (the diameter is more than or equal to 250 mm) plastic barrels are generally used for storing chemical raw materials, other objects can be stored, and as a lot of chemical raw materials have high purity requirements, if sealing rings (made of rubber) are adopted for sealing, rubber particles possibly enter the chemical raw materials to cause pollution and scrapping of the raw materials due to friction in the opening and closing process of the barrel cover, and therefore the large-caliber plastic barrels mostly adopt sealing structures without sealing rings. The sealing structure adopted by the high-sealing large-caliber plastic barrel in the market at present mainly comprises a first mode of tightening and a second mode of compacting. The disadvantage of the tightening is that an additional plastic hoop (initially a metal hoop is adopted and then modified into a plastic hoop) is required, the plastic hoop not only increases the manufacturing cost, but also has an outer diameter larger than that of the plastic barrel, the arrangement of the plastic hoop increases the occupied space and the transportation cost, and in addition, the tightening and opening of the plastic hoop increases the opening and closing steps of the plastic barrel. The compression type sealing mode is completed by compression equipment when the plastic barrel is compressed, the complexity of the covering effect is increased, when the plastic barrel is opened, the plastic barrel is firstly cut by a blade, the operation is very inconvenient, and more importantly, the plastic barrel is difficult to seal secondarily after being opened, and the recycling rate is poor. Therefore, the sealing structure of the existing large-caliber plastic bucket needs to be further improved. Disclosure of utility model The utility model aims to overcome the defects, and discloses a sealing structure of a large-caliber plastic barrel which is simple and reasonable in structure, low in manufacturing cost and good in sealing performance to society. The technical scheme of the utility model is realized as follows: The utility model provides a seal structure of heavy-calibre plastic drum, including staving and the bung of looks adaptation, staving and bung threaded connection, the bung on set up protruding muscle, and form with the upper edge looks adaptation's of staving seal groove, the inboard of seal groove be provided with first seal line, the top of seal groove be provided with the second seal line, the outside of seal groove be provided with the third seal line, the periphery of bung be provided with fixed knot, the periphery of staving be provided with the lug, fixed knot be provided with the catching groove of lug looks adaptation. The measures for further optimizing the technical scheme are as follows: as an improvement, the outer side of the convex rib is an inclined plane with the lower end inclined outwards. The outside adopts the inclined plane setting, can make the contact of protruding muscle and staving be line contact to improve the leakproofness. As an improvement, the lower end of the convex rib is provided with a guide surface. The arrangement of the guide surface can enable the upper edge of the barrel body to enter the sealing groove more easily. As an improvement, the fixing buckle is provided with a handle part below the buckle groove. The handle part is arranged, so that downward force is conveniently applied, and the downward buckling of the barrel cover is conveniently realized. As an improvement, a protrusion with a circular arc-shaped surface is arranged on the outer side of the sealing groove, and a third sealing line is formed at the top end of the circular arc-shaped structure. Through the convex arrangement of the arc-shaped structure on the surface, line contact is guaranteed, and sealing performance is improved. As an improvement, the number of the fixing buckles is 4-6. The fixing buckles are uniformly distributed on the circumferential surface. As an improvement, a bending part is arranged between the fixing buckle and the barrel cover. As an improvement, the outer side of the lower end of the lug is provided with a chamfer surface. The chamfer surface is arranged, so that the convex blocks can conveniently enter the buckling grooves of the fixing buckles. Compared with the prior art, the utility model has the advantages that: The sealing structure of the large-caliber plastic bucket is simple and reasonable in structure and low in manufacturing cost, the bucket cover is provided with the sealing groove, the inner side, the top and the outer side of the sealing groove are correspondingly provided with the first sealing line, the second sealing line and the third sealing line, the periphery