High-pressure-resistant oil tank pad

Abstract

The utility model belongs to the technical field of oil tank spare parts, and disclose a kind of high-pressure-resistant oil tank pad, to solve the problem of traditional oil tank pad easy to appear super-yield limit fracture under pressure, the oil tank pad includes the first pad piece of hole round sheet, second pad piece and movable piece, first pad piece and second pad piece are respectively provided with circumferentially symmetrical and staggered support strip, and the reserved gap between support strip is used as deformation space, to avoid material damage under high pressure super-yield limit;Both are provided with flange let hole and alignment convenient mouth, convenient for installation positioning, movable piece is arranged between two pad pieces, one side is provided with annular support strip and pressure self-sealing structure, pressure self-sealing structure is made of annular round convex extrusion each other, form the self-reinforcing effect of "the higher the pressure, the tighter the sealing", the oil tank pad is made of oil-resistant and anti-aging flexible material, can dynamically adapt flange deformation, give consideration to sealing performance and pressure resistance, applicable to oil tank oil injection, oil outlet pipeline and the flange sealing of measuring hole junction.

Description

Technical Field

[0001] This utility model relates to the technical field of spare parts for oil tanks, specifically a high-pressure resistant oil tank gasket. Background Technology

[0002] In the petroleum, chemical, and shipping industries, oil tanks are core equipment for oil storage and transfer. The sealing reliability of their piping systems directly affects production safety, environmental protection, and operational efficiency. The oil injection connection pipes, oil outlet connection pipes, and test hole connections serve as critical interfaces between the oil tank and external equipment, commonly employing flange connections. The oil tank gasket is the core component for achieving flange sealing. Its main function is to fill the microscopic gaps between the flange faces, blocking oil seepage paths and preventing oil leakage from the flange joints. This prevents resource waste, environmental pollution, and safety hazards such as fires and explosions, thus playing an irreplaceable role in oil tank piping systems.

[0003] Most oil tank gaskets currently on the market are single, integral structures, primarily made of rubber, polymer composites, or metal-coated gaskets. While they can meet basic sealing requirements under normal operating conditions, their sealing performance and structural stability face significant challenges due to the characteristics of the oil and the operating environment. Specifically, oil generally has a low specific heat capacity, meaning that the oil temperature inside the oil tank pipeline is prone to drastic changes with fluctuations in the external ambient temperature or the internal oil circulation state. Simultaneously, dynamic changes in the oil volume within the tank can cause periodic pressure fluctuations within the pipeline, leading to unstable stress loads on the flange components.

[0004] Under the combined effects of temperature and pressure, flanges are prone to thermal expansion and contraction or structural deformation, which is directly transmitted to the oil tank gasket they are in contact with. If the flange bolts are tightened too much to ensure an initial seal, the oil tank gasket will be excessively compressed. When the flange deforms further due to temperature or pressure changes, the compressive force on the oil tank gasket will quickly exceed its material yield strength limit, leading to damage such as cracks and breakage. This not only results in loss of sealing function but may also cause secondary failures such as pipeline blockage due to gasket fragments falling off and contaminating the oil. Conversely, if the flange bolts are initially tightened too loosely to avoid excessive gasket compression, although this allows for some deformation space for the gasket, it will prevent the formation of an effective sealing pressure between the flange face and the oil tank gasket. Oil will easily leak from the flange gaps, especially when the oil pressure in the pipeline increases, the leakage will increase significantly, causing oil loss and potentially triggering the spread of flammable and explosive oil mist, posing a serious threat to the surrounding environment and personnel safety.

[0005] Furthermore, with the increasing demands for operating pressure and temperature ranges in the petrochemical industry, and the increasingly stringent environmental regulations on leakage control standards, traditional single-structure oil tank gaskets are no longer sufficient to meet the sealing requirements under complex operating conditions. How to resolve the contradiction between "initial sealing and deformation adaptation," ensuring reliable sealing performance after flange deformation while preventing gasket fracture due to exceeding the yield limit, has become a critical issue that urgently needs to be addressed in the field of oil tank pipeline sealing technology. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a high-pressure resistant oil tank gasket to solve the problems mentioned in the background art, such as the oil tank gasket's susceptibility to stress caused by deformation leading to over-yield limit fracture.

[0007] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a high-pressure resistant oil tank gasket, comprising:

[0008] The first pad is a perforated circular sheet structure. Multiple sets of first support strips are provided on one side of the first pad. The first support strips are symmetrically distributed in a circle, and the distance between the inner side of the first support strip and the center of the first pad is greater than the diameter of the hole in the middle of the first pad.

[0009] The second pad is a perforated circular plate structure. The second pad is disposed on the side of the first pad adjacent to the first support strip. The second pad is provided with multiple sets of second support strips similar to the first support strip, and the second support strips are offset from the first support strips. The first pad and the second pad are provided with multiple sets of through flange holes, and the flange holes are offset from the second support strips and the first support strips.

[0010] The movable component is disposed between the first pad and the second pad. The movable component is a perforated small circular piece structure. An annular support strip is provided on the side of the movable component adjacent to the first pad. A pressure self-sealing structure is provided inside the annular support strip.

[0011] Preferably, the first pad has a large central convexity at its center, and the second pad has a small central convexity at its center. The large central convexity abuts against the small central convexity, and the inner side of the movable member abuts against the outer ring of the small central convexity.

[0012] Preferably, the width of the large convex ridge is greater than the width of the small convex ridge.

[0013] Preferably, the pressure self-sealing structure includes a first annular protrusion and a second annular protrusion. The first annular protrusion is fixedly disposed on the movable member, and the second annular protrusion is fixedly disposed on the first pad. The distance between the first annular protrusion and the center of the first pad is less than the distance between the second annular protrusion and the center of the first pad. The first annular protrusion is engaged on the outer side of the large and medium protrusion, and the second annular protrusion is engaged on the inner side of the annular support strip. The first annular protrusion and the second annular protrusion are in compressive contact.

[0014] Preferably, the cross-sections of the first annular convex and the second annular convex are semi-circular, and the diameters of the first annular convex and the second annular convex are equal.

[0015] Preferably, the first pad and the second pad have alignment openings.

[0016] Compared with the prior art, this utility model provides a high-pressure resistant oil tank gasket, which has the following beneficial effects:

[0017] This high-pressure resistant oil tank gasket is equipped with a first gasket, a first support strip, a movable part, and a pressure self-sealing structure. The single gasket is divided into two gaskets, and a gap is left at the joint of the two gaskets, which can serve as a space for pressure deformation. This can prevent the material from breaking due to excessive pressure exceeding the yield limit. Under pressure, the movable part can deform inward relative to the gasket, which can enhance the sealing effect. It can meet the needs of oil tank use, has good sealing performance, strong pressure resistance, is not easy to be damaged, and is highly practical. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is an exploded view of the overall structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the movable part of this utility model;

[0021] Figure 4 This is a side cross-sectional view of the overall structure of this utility model.

[0022] In the diagram: 1. First gasket; 2. First support bar; 3. Second gasket; 4. Second support bar; 5. Flange opening; 6. Movable part; 7. Annular support bar; 8. Pressure self-sealing structure; 9. Large convex part; 10. Small convex part; 11. First annular convex part; 12. Second annular convex part; 13. Alignment port. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 This utility model provides a technical solution:

[0025] A high-pressure resistant oil tank pad, comprising:

[0026] The first pad 1 is a perforated circular plate structure. Multiple sets of first support strips 2 are provided on one side of the first pad 1. The first support strips 2 are symmetrically distributed in a circle, and the distance between the inner side of the first support strip 2 and the center of the first pad 1 is greater than the diameter of the hole in the middle of the first pad 1.

[0027] The second pad 3 is a perforated circular plate structure. The second pad 3 is disposed on the side of the first pad 1 adjacent to the first support strip 2. The second pad 3 is provided with multiple sets of second support strips 4 similar to the first support strip 2, and the second support strips 4 are staggered from the first support strip 2. Multiple sets of through flange holes 5 are provided on the first pad 1 and the second pad 3, and the flange holes 5 are staggered from the second support strips 4 and the first support strip 2.

[0028] Movable component 6 is positioned between the first pad 1 and the second pad 3. Movable component 6 is a perforated small circular plate structure. An annular support strip 7 is located on the side of movable component 6 adjacent to the first pad 1, and a pressure self-sealing structure 8 is installed inside the annular support strip 7. It is recommended that EPDM rubber or butyl rubber (with good oil resistance and aging resistance) be used for the first pad 1, the second pad 3, and movable component 6. Other flexible materials commonly used by those skilled in the art can also be used, but rigid metal materials should not be used. The first pad 1 and the second pad 3 are supported by the first support strip 2 and the second support strip 4, and there is a certain gap between the first support strip 2 and the second support strip 4. These gaps serve as space for material deformation, preventing shear failure due to high pressure exceeding the yield limit. Furthermore, movable component 6 and the pressure self-sealing structure 8 ensure that the pads maintain a seal even after parting, meeting the requirements for use in oil tanks.

[0029] Furthermore, the center of the first pad 1 is provided with a large central protrusion 9, and the center of the second pad 3 is provided with a small central protrusion 10. The large central protrusion 9 abuts against the small central protrusion 10, and the inner side of the movable part 6 abuts against the outer ring of the small central protrusion 10.

[0030] Furthermore, the width of the large central convex 9 is greater than the width of the small central convex 10. The width of the small central convex 10 is smaller than that of the large central convex 9, which can prevent the moving part 6 from loosening and squeezing the large central convex 9.

[0031] Furthermore, the pressure self-sealing structure 8 includes a first annular protrusion 11 and a second annular protrusion 12. The first annular protrusion 11 is fixedly disposed on the movable member 6, and the second annular protrusion 12 is fixedly disposed on the first pad member 1. The distance between the first annular protrusion 11 and the center of the first pad member 1 is less than the distance between the second annular protrusion 12 and the center of the first pad member 1. The first annular protrusion 11 is engaged on the outside of the large protrusion 9, and the second annular protrusion 12 is engaged on the inside of the annular support bar 7. The first annular protrusion 11 and the second annular protrusion 12 are in compressive contact.

[0032] Furthermore, the cross-sections of the first annular protrusion 11 and the second annular protrusion 12 are semi-circular, and the diameters of the first annular protrusion 11 and the second annular protrusion 12 are equal.

[0033] Furthermore, the first gasket 1 and the second gasket 3 are provided with alignment openings 13. When using this utility model, it is necessary to align the first gasket 1 and the second gasket 3 to align the flange clearance holes 5 on the first gasket 1 and the second gasket 3, so as to facilitate the installation of flange fixing bolts. The alignment openings 13 can assist in aligning the first gasket 1 and the second gasket 3.

[0034] Structural Description:

[0035] First pad 1: It has a perforated circular plate structure, with multiple sets of first support bars 2 on one side, a large and medium protrusion 9 in the center, and a flange opening 5 and an alignment convenience opening 13. It is one of the main components of the oil tank pad.

[0036] First support bar 2: It is set on one side of the first pad 1, and is symmetrically distributed in a circle. The distance between the inner side and the center of the first pad 1 is greater than the diameter of the middle hole of the first pad 1. It is staggered with the second support bar 4 to form an interlaced support structure and reserves deformation gaps.

[0037] The second pad 3 is a perforated circular plate structure located on the side of the first pad 1 near the first support bar 2. It has multiple sets of second support bars 4 that are similar to and staggered from the first support bar 2. It has flange holes 5 and alignment openings 13. It has a small central protrusion 10 in the center. It is another major component of the oil tank pad.

[0038] Second support bar 4: It is set on the second pad 3, similar to the first support bar 2 but staggered from it, and cooperates with the first support bar 2 to form a support structure. The gap between the two can serve as a material deformation space.

[0039] Flange relief hole 5: A through hole opened on the first gasket 1 and the second gasket 3, staggered from the first support bar 2 and the second support bar 4, used for flange fixing bolt installation to realize the positioning and installation of oil tank gasket and flange;

[0040] Movable component 6: It has a perforated small circular plate structure and is located between the first pad 1 and the second pad 3. A ring-shaped support strip 7 is provided on the side near the first pad 1. The inner side abuts against the outer ring of the small central protrusion 10. Under pressure, it can deform inward relative to the pad to enhance the seal.

[0041] Annular support bar 7: It is set on the side of the movable part 6 near the first pad 1, and has a pressure self-sealing structure 8 inside, which can drive the pressure self-sealing structure 8 to play its role when the movable part 6 is deformed.

[0042] Pressure self-sealing structure 8: Located inside the annular support strip 7, it includes a first annular protrusion 11 and a second annular protrusion 12. The two are pressed together and can form a self-reinforcing effect of "the higher the pressure, the tighter the seal", thus ensuring sealing performance.

[0043] Large central protrusion 9: Located at the center of the first pad 1, its width is greater than that of the small central protrusion 10. It abuts against the small central protrusion 10, which can restrict the radial displacement of the movable part 6 and also allow the first annular circular protrusion 11 to be stuck on its outer side.

[0044] Small protrusion 10: Located in the center of the second pad 3, its width is smaller than that of the large protrusion 9, and it is held in place by the large protrusion 9. Its outer side abuts against the inner side of the movable part 6, which can prevent the movable part 6 from loosening and squeezing the large protrusion 9.

[0045] The first annular convex 11 is fixed on the movable part 6. Its cross-section is semi-circular. The distance from the center of the first pad 1 is smaller than that of the second annular convex 12. It is stuck on the outside of the large and medium convex 9 and forms a seal by pressing and contacting the second annular convex 12.

[0046] The second annular protrusion 12 is fixed on the first pad 1. It has a semi-circular cross section and a diameter equal to that of the first annular protrusion 11. It is stuck inside the annular support strip 7 and is pressed into contact with the first annular protrusion 11 to achieve a seal.

[0047] Alignment port 13: Opened on the first gasket 1 and the second gasket 3 to assist in the alignment of the first gasket 1 and the second gasket 3, ensuring that the flange holes 5 on both are aligned for the installation of flange fixing bolts.

[0048] Working Principle: This high-pressure resistant oil tank gasket achieves reliable sealing and deformation resistance under high-pressure conditions through a split-structure design and dynamic sealing mechanism. Its working principle is based on multi-layered synergistic action: When the flange bolts are tightened, the first gasket 1 and the second gasket 3 are positioned and installed through the flange relief hole 5, aligning with the convenience opening 13 to ensure precise fit. At this time, the first support bar 2 and the second support bar 4 form an interlaced support structure, with their gaps providing initial deformation buffer space for the whole. Meanwhile, the movable part 6 is sandwiched between the two gaskets, and the annular support bar 7 and the pressure self-sealing structure 8 form a pre-sealed state. The first annular convex 11 and the second annular convex 12 are pressed against each other with semi-circular cross-sections, forming the first sealing line through the elastic deformation of EPDM or butyl rubber. Simultaneously, the nested fit of the large medium convex 9 and the small medium convex 10 (the width of the large medium convex 9 is greater than that of the small medium convex 10) restricts the radial displacement of the movable part 6, preventing it from shifting due to compression.

[0049] When the flange of the oil tank pipeline deforms due to temperature fluctuations or changes in oil volume, this structure exhibits dynamic adaptive characteristics: if the flange contracts inward and generates additional pressure, the first gasket 1 and the second gasket 3 undergo slight deformation through the gap of the support strip to prevent the overall stress from exceeding the material yield limit; at the same time, the pressure is transmitted to the movable part 6, causing it to squeeze inward, which drives the annular support strip 7 to compress the pressure self-sealing structure 8. The semi-circular contact surfaces of the first annular convex 11 and the second annular convex 12 undergo greater elastic deformation due to the increased pressure, and the contact area expands accordingly, forming a self-reinforcing effect of "the higher the pressure, the tighter the seal". In addition, the design of the inner side of the movable part 6 abutting against the outer ring of the small and medium convex 10 ensures that the pressure self-sealing structure 8 is always in the stress center area, preventing seal failure caused by off-center loading.

[0050] If the flange expands due to increased temperature or decreased pressure, the gap in the support strip provides space for the gasket to extend outward, preventing tearing caused by rigid tension. At this time, the pressure self-sealing structure 8 still maintains the basic pre-tightening force, and the elastic restoring force of the first annular convex 11 and the second annular convex 12 maintains the sealing surface fit. Combined with the limiting effect of the large and medium convex 9 and the small and medium convex 10, it prevents the sealing gap caused by the loosening of the moving part 6. This design not only solves the contradiction of traditional integral gaskets being "too tight and prone to breakage, too loose and prone to leakage", but also, through the combination of split structure and self-sealing mechanism, ensures that the oil tank gasket maintains reliable sealing performance within a large temperature fluctuation and a certain pressure change range. It can meet the high-pressure sealing requirements of key parts such as oil injection pipelines, oil outlet pipelines and test hole connections, and the oil tank gasket is not prone to damage beyond its yield limit.

[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-pressure resistant oil tank pad, comprising: The first pad (1) is a perforated circular plate structure. Multiple sets of first support strips (2) are provided on one side of the first pad (1). The first support strips (2) are symmetrically distributed around the circumference, and the distance between the inner side of the first support strip (2) and the center of the first pad (1) is greater than the diameter of the hole in the middle of the first pad (1). The second pad (3) is a perforated circular plate structure. The second pad (3) is disposed on the side of the first pad (1) near the first support strip (2). The second pad (3) is provided with multiple sets of second support strips (4) similar to the first support strip (2), and the second support strips (4) are offset from the first support strip (2). The first pad (1) and the second pad (3) are provided with multiple sets of through flange holes (5), and the flange holes (5) are offset from the second support strip (4) and the first support strip (2). The movable part (6) is disposed between the first pad (1) and the second pad (3). The movable part (6) is a perforated small circular piece structure. An annular support strip (7) is provided on the side of the movable part (6) adjacent to the first pad (1). A pressure self-sealing structure (8) is provided inside the annular support strip (7).

2. The high-pressure resistant oil tank gasket according to claim 1, characterized in that, The first pad (1) has a large central protrusion (9) at its center, and the second pad (3) has a small central protrusion (10) at its center. The large central protrusion (9) abuts against the small central protrusion (10), and the inner side of the movable part (6) abuts against the outer ring of the small central protrusion (10).

3. The high-pressure resistant oil tank gasket according to claim 2, characterized in that, The width of the large convex (9) is greater than the width of the small convex (10).

4. The high-pressure resistant oil tank gasket according to claim 3, characterized in that, The pressure self-sealing structure (8) includes a first annular protrusion (11) and a second annular protrusion (12). The first annular protrusion (11) is fixedly disposed on the movable part (6), and the second annular protrusion (12) is fixedly disposed on the first pad (1). The distance between the first annular protrusion (11) and the center of the first pad (1) is less than the distance between the second annular protrusion (12) and the center of the first pad (1). The first annular protrusion (11) is locked on the outside of the large and medium protrusion (9), and the second annular protrusion (12) is locked on the inside of the annular support strip (7). The first annular protrusion (11) and the second annular protrusion (12) are in pressure contact.

5. A high-pressure resistant oil tank gasket according to claim 4, characterized in that, The cross-sections of the first annular convex (11) and the second annular convex (12) are semi-circular, and the diameters of the first annular convex (11) and the second annular convex (12) are equal.

6. The high-pressure resistant oil tank gasket according to claim 1, characterized in that, Alignment openings (13) are provided on the first pad (1) and the second pad (3).

Images