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CN-224229232-U - Sectional groove type special-shaped sealing structure suitable for offshore platform explosion-proof box

CN224229232UCN 224229232 UCN224229232 UCN 224229232UCN-224229232-U

Abstract

The utility model discloses a sectional groove type special-shaped sealing structure suitable for an explosion-proof box of an offshore platform, which comprises a primary sealing structure, a secondary sealing structure and a tertiary sealing structure which are sequentially arranged from the center to the periphery, wherein the primary sealing structure comprises a lower annular groove formed on the top surface of the explosion-proof box body, an upper annular groove formed on the bottom surface of the explosion-proof box cover and self-tightening gaskets of which the two ends are respectively arranged in the lower annular groove and the upper annular groove, the secondary sealing structure comprises a lower groove formed on the top surface of the explosion-proof box body and an I-shaped sealing ring arranged in the lower groove, and the tertiary sealing structure comprises an upper groove formed on the bottom surface of the explosion-proof box cover, a convex ring formed on the top surface of the explosion-proof box body and an II-shaped sealing ring arranged in the upper groove. The utility model realizes the comprehensive adaptation of the explosion-proof scene through the multi-layer sealing structure, fully ensures the air tightness of the explosion-proof box, remarkably improves the sealing performance and the environment adaptability, and prolongs the service life of the explosion-proof box.

Inventors

  • MENG XUE
  • YIN HONG
  • LI YANLI
  • LIU HAO
  • AN PENGHUI
  • NING SHUZHI
  • MA ZIHAN
  • LI ZIHE
  • WANG YIFEI

Assignees

  • 中海油天津化工研究设计院有限公司
  • 中国海洋石油集团有限公司

Dates

Publication Date
20260512
Application Date
20250519

Claims (10)

  1. 1. The sectional groove type special-shaped sealing structure suitable for the offshore platform explosion-proof box is characterized by comprising a primary sealing structure, a secondary sealing structure and a tertiary sealing structure which are sequentially arranged from the center to the periphery; The primary sealing structure comprises a lower annular groove (11) formed on the top surface of the explosion-proof box body (1), an upper annular groove (21) formed on the bottom surface of the explosion-proof box cover (2) and a self-tightening gasket (4) with two ends respectively arranged in the lower annular groove (11) and the upper annular groove (21); The secondary sealing structure comprises a lower groove formed on the top surface of the explosion-proof box body (1) and an I-shaped sealing ring (5) arranged in the lower groove; The three-stage sealing structure comprises an upper groove formed on the bottom surface of the explosion-proof box cover (2), a convex ring (13) formed on the top surface of the explosion-proof box body (1) and a II-shaped sealing ring (6) arranged in the upper groove.
  2. 2. The sectional groove type special-shaped sealing structure suitable for the offshore platform explosion-proof box, which is disclosed in claim 1, is characterized in that the groove sections of the lower annular groove (11) and the upper annular groove (21) are isosceles trapezoids with wide inner sides and narrow outer sides, and the lower annular groove and the upper annular groove are arranged in a mirror symmetry mode.
  3. 3. The sectional groove type special-shaped sealing structure suitable for the offshore platform explosion-proof tank according to claim 1, wherein the included angle between the groove walls of the lower annular groove (11) and the upper annular groove (21) and the groove bottom is 113 degrees.
  4. 4. The sectional groove type special-shaped sealing structure suitable for the offshore platform explosion-proof box, which is disclosed in claim 1, is characterized in that dynamic sealing layers are arranged on the outer side groove walls of the lower annular groove (11) and the upper annular groove (21), and the dynamic sealing layers are reinforced graphite materials.
  5. 5. The sectional groove type special-shaped sealing structure for the offshore platform explosion-proof tank of claim 1, wherein the groove section of the lower groove is rectangular.
  6. 6. The sectional groove type special-shaped sealing structure suitable for the offshore platform explosion-proof box is characterized in that the I-shaped sealing ring (5) is a flexible telescopic sealing ring, the I-shaped sealing ring (5) comprises a sealing shell and a spring arranged in the sealing shell, the sealing shell is made of a high polymer composite material, and the spring is a fatigue-resistant metal spring.
  7. 7. The sectional groove type special-shaped sealing structure suitable for the offshore platform explosion-proof box, which is disclosed in claim 1, is characterized in that the longitudinal section of the II-type sealing ring (6) is U-shaped, an opening faces the explosion-proof box body (1), and the convex ring (13) is inserted into the U-shaped cavity of the II-type sealing ring (6).
  8. 8. The sectional groove type special-shaped sealing structure suitable for the offshore platform explosion-proof box, as claimed in claim 1, is characterized by further comprising a four-stage sealing structure, wherein the four-stage sealing structure comprises a convex edge (12) formed on the edge of the top surface of the explosion-proof box body (1) and seepage-proof sealant (7) filled between the convex edge (12) and the outer wall of the explosion-proof box cover (2).
  9. 9. The sectional groove type special-shaped sealing structure for the offshore platform explosion-proof box, which is disclosed in claim 1, is characterized in that the explosion-proof box body (1) and the explosion-proof box cover (2) are connected and fixed through precisely aligned fastening holes and high-strength bolts (3).
  10. 10. The sectional groove type special-shaped sealing structure for the offshore platform explosion-proof box, which is disclosed in claim 1, is characterized in that nitrogen is filled in the explosion-proof box consisting of the explosion-proof box body (1) and the explosion-proof box cover (2).

Description

Sectional groove type special-shaped sealing structure suitable for offshore platform explosion-proof box Technical Field The utility model belongs to the field of explosion-proof equipment, and particularly relates to a sectional groove type special-shaped sealing structure suitable for an explosion-proof box of an offshore platform. Background The sealing structure of the existing explosion-proof box is designed to be heavy-duty by adopting a traditional rubber gasket or a metal sealing ring, and can provide basic air tightness and pressure resistance, but the sealing structure is used for a long time in the severe environment of an offshore platform, and has the following problems that (1) the sealing layer is insufficient, especially under the severe environment condition, a single sealing layer cannot effectively resist high temperature, high humidity, corrosive gas and other challenges, the risk of degrading the sealing performance exists, the sealing effect is required to be upgraded, and (2) the contact surface of the box body and the box cover is lack of effective positioning design, and although the rubber gasket can temporarily provide a certain sealing effect, the box cover is easy to deviate or deform in the disassembly, transportation or use process of high frequency, so that the sealing failure is caused, thereby affecting the air tightness and the safety of the explosion-proof box, (3) the offshore platform is complex and severe in environment, the conventional sealing material is lower in tolerance, easy to age and damage, and cannot provide stable sealing protection for a long time under the conditions of high temperature, high humidity, corrosive gas, marine salt fog and the like. Therefore, a novel multiple sealing structure of the explosion-proof box suitable for the offshore platform is needed to be designed. Disclosure of utility model The utility model provides a sectional groove type special-shaped sealing structure suitable for an explosion-proof box of an offshore platform, which aims to solve the problems of sealing failure and positioning offset of the explosion-proof box in the prior art. The utility model is realized by the following technical scheme: The sectional groove type special-shaped sealing structure suitable for the explosion-proof box of the offshore platform comprises a primary sealing structure, a secondary sealing structure and a tertiary sealing structure which are sequentially arranged from the center to the periphery, wherein the primary sealing structure comprises a lower annular groove formed on the top surface of the explosion-proof box body, an upper annular groove formed on the bottom surface of the explosion-proof box cover and self-tightening gaskets of which the two ends are respectively arranged in the lower annular groove and the upper annular groove, the secondary sealing structure comprises a lower groove formed on the top surface of the explosion-proof box body and an I-shaped sealing ring arranged in the lower groove, and the tertiary sealing structure comprises an upper groove formed on the bottom surface of the explosion-proof box body, a convex ring formed on the top surface of the explosion-proof box body and an II-shaped sealing ring arranged in the upper groove. In the above technical scheme, the cross sections of the lower ring groove and the upper ring groove are isosceles trapezoids with wide inner side and narrow outer side, and the two are arranged in mirror symmetry. In the technical scheme, the included angle between the groove walls of the lower annular groove and the upper annular groove and the groove bottom is 113 degrees. In the technical scheme, dynamic sealing layers are arranged on the outer side groove walls of the lower annular groove and the upper annular groove, and the dynamic sealing layers are made of reinforced graphite materials. In the above technical solution, the cross section of the lower groove is rectangular; In the technical scheme, the I-shaped sealing ring is a flexible and telescopic sealing ring and comprises a sealing shell and a spring arranged in the sealing shell, wherein the sealing shell is made of a polymer composite material, and the spring is a fatigue-resistant metal spring. In the above technical scheme, the longitudinal section of the II sealing ring is U-shaped, and the opening faces the explosion-proof box body, and the convex ring is inserted into the U-shaped cavity of the II sealing ring. In the technical scheme, the anti-seepage sealing device further comprises a four-stage sealing structure, wherein the four-stage sealing structure comprises a convex edge formed on the edge of the top surface of the anti-explosion box body and anti-seepage sealing glue filled between the convex edge and the outer wall of the anti-explosion box cover. In the technical scheme, the explosion-proof box body and the explosion-proof box cover are connected and fixed through the precisely aligned fastening hole