CN206257274U - Inclusion seal structure - Google Patents

Abstract

The utility model discloses a kind of inclusion seal structure, belong to sealing device technical field, including body, screw plug and sealing gasket, screw plug is metal material with sealing gasket, one is set on the inner circle faying face of screw plug seal face and/or sealing gasket and encloses vulcanized rubber, vulcanized rubber is bonded with screw plug and/or sealing gasket using vulcanization, adhesion strength ＞ 3MPa；It is polymorphic structure to be arranged on the vulcanized rubber set on the inner circle faying face of sealing gasket, the part III of the part ii and part ii connection of the part I being connected including the inner circle with sealing gasket and the connection of part I and the part VII of the part V of the connection of part III and the part VI of the connection of part V and the connection of part VI, which part I, part III, part VI are rectangle, and part ii, part V, part VII are trapezoidal.The utility model eliminates composition surface gap, prevents composition surface seepage, reduces the requirement of the precision and surface roughness at sealing engagement face.

Description

Inclusion seal structure

Technical field

The utility model is related to a kind of inclusion seal structure, belongs to sealing device technical field.

Background technology

Leakage is one of failure that plant equipment is often produced.The reason for causing leakage mainly has two aspects：One is due to machine The result of tool processing, the surface of engineering goods certainly exists various defects and shape and dimensional discrepancy, therefore, in machine components connection The place of connecing inevitably results from gap；Two is that sealing both sides have pressure differential, and working media will be revealed by gap.

There is different degrees of Seepage in the cooling system of engine, gas handling system and lubricating system etc..Solution is started The leakage problems of machine, can not only improve the product quality of engine, moreover it is possible to reduce the seepage of fuel and machine oil, the wave of energy saving Take.

It is the main path for preventing leakage that gap is reduced or eliminated.The effect of sealing is exactly by the gap envelope between composition surface Firmly, isolate or cut off leakage channel, increase the resistance in leakage channel, or add small-sized acting element in the channel, to letting out Dew thing build-up of pressure, offsets or complete equipilibrium, with the voltage difference part of leakage is caused to prevent leakage.Wherein static seal is to adopt extensively A kind of measure for taking.

Static seal mainly has dot encapsulation, glue sealing and contact sealing three major types.According to operating pressure, during static seal can be divided into Low pressure static seal and high pressure static seal.Mesolow static seal often uses soft material, pad pad sealing wider；High pressure static seal is then It is harder with material, the very narrow metallic gasket of contact width.

Pad sealing is widely used in pipeline, in the static seal of the faying face of pressure vessel and various housings.Pad is sealed with Nonmetallic sealing gasket, nonmetallic and metallic combination sealing gasket and metallic gasket three major types.

The leakage for padding sealing has three kinds of forms：Interface is revealed, and infiltration leakage and destructiveness are revealed.

In general, in Room-temperature low-pressure, from nonmetallic soft seal pad；During middle super pressure-high temperature, from metal with it is nonmetallic Combination sealing pad or metallic gasket；In temperature, when pressure has larger fluctuation, from elastic good or self-energized seal pad； In low temperature, under Korrosionsmedium or vacuum condition, the sealing gasket with property is considered as.

Shaped packing seal refers to the ring-type being molded through molding or turnery processing with rubber, plastics, leather and metal material Sealing ring.

Shaping filler is divided into extrusion pressing type sealing ring and the class of lip-type packing two by working characteristics；Can be divided into rubber by material Class, Plastic, leather-like and metal class.Rubber extruded type sealing ring is most widely used in the extrusion pressing type sealing ring of various materials, its Middle O-ring is with the longest history, most typically.

Many using " stifled-pad-body " sealing structure, i.e. screw plug in engine pipelines system, sealing gasket and body are constituted.But At present in the seal approach that uses, in sealing gasket when using, both pressure and temperatures are mutually restrictions, with the liter of temperature Height, equipment operation for a period of time after, gasket material occur softenings, creep, stress relaxation phenomenon, mechanical strength also understand under Drop, the pressure reduction of sealing, easily causes leakage.

Utility model content

The utility model technical issues that need to address are to provide a kind of inclusion seal structure, eliminate composition surface gap, Composition surface seepage is prevented, the requirement of the precision and surface roughness at sealing engagement face is reduced.

In order to solve the above technical problems, the technical scheme that the utility model is used is：

A kind of inclusion seal structure, including the screw plug being arranged on body, the sealing that is arranged between body and screw plug Pad, screw plug is metal material with sealing gasket, one is set on the inner circle faying face of screw plug seal face and/or sealing gasket and encloses sulphur Change rubber, vulcanized rubber is bonded with screw plug and/or sealing gasket using vulcanization, adhesion strength ＞ 3MPa.

Technical solutions of the utility model further improvement is that：The vulcanized rubber that screw plug surface pastes is higher by screw plug sealing 0.2~0.3mm of end face.

Technical solutions of the utility model further improvement is that：The vulcanized rubber set on the inner circle faying face of sealing gasket Section is polymorphic structure, and polymorphic structure includes part ii and the portion of the part I being connected with the inner circle of sealing gasket and the connection of part I Divide the part of the part VI and the connection of part VI of the part III of II connection and the part V of the connection of part III and the connection of part V VII, which part I, part III, part VI are rectangle, and part ii, part V, part VII are trapezoidal.

Technical solutions of the utility model further improvement is that：Part ii, part V, part VII are isosceles trapezoid, And part V is symmetrical relative to the axis of part VI with part VII, upper bottom equal length, the part ii of part ii and part V Bottom be shorter than the bottom of part V.

Technical solutions of the utility model further improvement is that：The extended line of part ii waist is 30 with horizontal angle ~60 °, extended line and the horizontal angle of the waist of part V are 30~60 °.

Technical solutions of the utility model further improvement is that：Screw plug is low-carbon steel material, sealing gasket be aluminium material or Copper material.

Technical solutions of the utility model further improvement is that：Screw plug is No. 20 steel, screw-down torque 180Nm.

By adopting the above-described technical solution, the technological progress that the utility model is obtained is：

The present invention is applied in combination by screw plug and rubber and sealing gasket and rubber, and elimination composition surface gap prevents to connect Conjunction face seepage, reduces the requirement of the precision and surface roughness at sealing engagement face, and rubber uses sulphur with screw plug and sealing gasket Change and bond, adhesion strength is more than 3MPa.

A circle rubber is pasted on screw plug surface, this screw plug is not compared with surface pastes rubber, and pretension reduces than pressure, close Sealing property is improved, and can effectively solve the leakage problems of faying face.

Metallic gasket needs larger Bolt Tightening Force.A circle rubber is pasted in screw plug sealing surface, in less pretension Sealing effectiveness can be just played under power.When seal is aluminum casting, threaded connection intensity is relatively low, when plug screw screw-down torque is smaller, Using the sealing means, antiseep effect can be effectively acted as.

Rubber is softer, and coating performance is good, and sealing effectiveness can be just played under less pretightning force.Soft seal is to flange face Roughness requirements it is much lower because it is easily deformed, processing knife mark can be blocked, so as to prevent seepage.

A circle rubber is pasted in sealing gasket inner ring, pretension is reduced than pressure, sealing property is improved.Utilize rubber simultaneously Softer, coating performance is good, and sealing effectiveness can be just played under less pretightning force.

Brief description of the drawings

Fig. 1 is the structural representation of the utility model embodiment 1；

Fig. 2 is the partial enlarged drawing of Fig. 1；

Fig. 3 is the structural representation of the utility model embodiment 2；

Fig. 4 is the partial enlarged drawing of Fig. 3；

Wherein, 2, screw plug, 3, sealing gasket, 4, vulcanized rubber, 41, part I, 42, part ii, 43, part III, 44, part V, 45, part VI, 46, part VII.

Specific embodiment

The utility model is described in further details with reference to embodiment：

Embodiment 1

As depicted in figs. 1 and 2, a kind of inclusion seal structure, including be arranged on body screw plug 2, be arranged on body With the sealing gasket 3 between screw plug 2, screw plug 2 and sealing gasket 3 are metal material, and screw plug 2 is low-carbon steel material, such as screw plug 2 is No. 20 steel, screw-down torque 180Nm.One is set on the seal face of screw plug 2 and encloses vulcanized rubber 4, vulcanized rubber 4 is adopted with screw plug 2 Bonded with vulcanization, adhesion strength ＞ 3MPa.The vulcanized rubber that the surface of screw plug 2 pastes is higher by the 0.2~0.3mm of seal face of screw plug 2, Such as can be 0.2mm, 0.25mm or 0.3mm.

Embodiment 2

The present embodiment is distinguished as with embodiment 1：As shown in Figure 3 and Figure 4, only set on the inner circle faying face of sealing gasket 3 A circle vulcanized rubber 4 is put, sealing gasket 3 is aluminium material or copper material, the vulcanized rubber 4 set on the inner circle faying face of sealing gasket 3 Section is polymorphic structure, and polymorphic structure includes the part ii of the part I 41 being connected with the inner circle of sealing gasket 3 and the connection of part I 41 42 and part ii 42 connection part III 43 and part III 43 connection part V 44 and part V 44 connection part VI 45 and part VI 45 connection part VII 46, which part I 41, part III 43, part VI 45 are rectangle, part ii 42, portion V 44, part VII 46 is divided to be trapezoidal.

Part ii 42, part V 44, part VII 46 are isosceles trapezoid, and part V 44 and part VII 46 relative to part VI 45 axis is symmetrical, and the upper bottom equal length of part ii 42 and part V 44, the bottom of part ii 42 are shorter than part V 44 Bottom.

The extended line of the waist of part ii 42 is 30~60 °, the extended line and level of the waist of part V 44 with horizontal angle R1 The angle R2 of line is 30~60 °, and R1, R2 are 60 ° in the present embodiment, it is also possible to which R1 is 45 °, R2 is 30 °.

Embodiment 3

The present embodiment is distinguished as with embodiment 1：It is all provided with the inner circle faying face of the seal face of screw plug 2 and sealing gasket 3 A circle vulcanized rubber 4 is put, the section of vulcanized rubber 4 is polymorphic structure, structure and the phase of embodiment 2 of the vulcanized rubber 4 of polymorphic structure Together, the vulcanized rubber 4 of screw plug 2 is same as Example 1, will not be repeated here.

Claims (7)

1. a kind of inclusion seal structure, including it is arranged on the screw plug on body（2）, be arranged on body and screw plug（2）Between Sealing gasket（3）, screw plug（2）With sealing gasket（3）It is metal material, it is characterised in that：In screw plug（2）Seal face and/or close Packing（3）Inner circle faying face on set one enclose vulcanized rubber（4）, vulcanized rubber（4）With screw plug（2）And/or sealing gasket（3）Adopt Bonded with vulcanization, adhesion strength ＞ 3MPa.

2. inclusion seal structure according to claim 1, it is characterised in that：Screw plug（2）The vulcanized rubber that surface pastes It is higher by screw plug（2）0.2~0.3mm of seal face.

3. inclusion seal structure according to claim 1, it is characterised in that：Sealing gasket（3）Inner circle faying face on set The vulcanized rubber put（4）Section is polymorphic structure, and polymorphic structure includes and sealing gasket（3）Inner circle connection part I（41）With Part I（41）The part ii of connection（42）With part ii（42）The part III of connection（43）With part III（43）The part of connection Ⅴ（44）With part V（44）The part VI of connection（45）With part VI（45）The part VII of connection（46）, which part I （41）, part III（43）, part VI（45）It is rectangle, part ii（42）, part V（44）, part VII（46）It is trapezoidal.

4. inclusion seal structure according to claim 3, it is characterised in that：Part ii（42）, part V（44）, part Ⅶ（46）It is isosceles trapezoid, and part V（44）With part VII（46）Relative to part VI（45）Axis it is symmetrical, part Ⅱ（42）With part V（44）Upper bottom equal length, part ii（42）Bottom be shorter than part V（44）Bottom.

5. inclusion seal structure according to claim 4, it is characterised in that：Part ii（42）The extended line and level of waist The angle of line is 30~60 °, part V（44）The extended line of waist is 30~60 ° with horizontal angle.

6. inclusion seal structure according to claim 5, it is characterised in that：Screw plug（2）It is low-carbon steel material, sealing gasket （3）It is aluminium material or copper material.

7. inclusion seal structure according to claim 6, it is characterised in that：Screw plug（2）It is No. 20 steel, screw-down torque 180N·m。