CN212509499U

CN212509499U - Compound elasticity rubber seal structure

Info

Publication number: CN212509499U
Application number: CN202021089029.9U
Authority: CN
Inventors: 刘红波; 张英杰; 温锁林; 潘伟强; 陈志华
Original assignee: Tianjin University; Shanghai Tunnel Engineering Co Ltd
Current assignee: Tianjin University; Shanghai Tunnel Engineering Co Ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-02-09
Anticipated expiration: 2030-06-12

Abstract

The utility model discloses a compound elasticity rubber seal structure, including middle part owner circle, outside circle and inboard circle, the middle part owner circle is made by non-inflation rubber, and the section adopts M shape structure, is equipped with outside seal groove and inboard seal groove, controls both wings middle part and is equipped with along the annular ring of circumference extension, the outside circle with the inboard circle all is made by meeting water inflation rubber, the inboard of outside circle coincide in the outside seal groove of middle part owner circle, the two forms sealing connection, the outside of inboard circle coincide in the inboard seal groove of middle part owner circle, the two forms sealing connection, the equipment back, the excircle of outside circle with the excircle of middle part owner circle is the same, the interior circle of inboard circle with the interior circle of middle part owner circle is the same. The utility model can effectively increase the contact effect when being pressed, after meeting water, the outer ring and the inner ring expand to make the contact surface more tightly attached, and the waterproof performance is good; and the assembly force can be reduced, and the assembly is convenient.

Description

Compound elasticity rubber seal structure

Technical Field

The utility model relates to a sealing washer structure, especially a compound elasticity rubber seal structure.

Background

With the development of urban rail transit, the construction technology of underground tunnels is continuously improved, and trenchless technologies such as a pipe jacking method and the like are rapidly developed and applied. The pipe-jacking method is a construction technology for carrying out rock-soil drilling and excavation under the condition of no excavation of the earth surface without environmental pollution, and utilizes a hydraulic oil cylinder to jack a pipe section into a drilling hole formed by a cutting cutter head or excavation to form a lining, thereby forming a pipe-jacking structure. The pipe jacking structure is formed by splicing prefabricated pipe pieces, the joint is complex in structure and is a weak part of the structure, the joint is very sensitive to deformation, and the reliability of the joint is related to the reliability of the pipe jacking structure.

The pipe jacking structure is used as an underground structure, and the reliability of the joint is mainly reflected in the aspect of waterproof performance. The section of jurisdiction connects generally to adopt rubber packing pad as main waterproof measure, in case leak, will lead to rubber packing pad ageing absolutely, and the condition such as the corruption of crack and damage and push pipe structure internal plant appears in joint department concrete, will reduce push pipe structure's life. Therefore, the research on the waterproof mechanical property of the rubber sealing gasket for the seam of the pipe jacking structure has important significance for guaranteeing the safety and the durability of the pipe jacking structure. On the other hand, the joint can meet the waterproof sealing performance and the economical efficiency and the practicability of engineering site construction, namely, the assembling force required in the assembling process is also considered, and the closing pressure of the segment joint is required to be as small as possible.

The key of the design of the joint of the pipe jacking structure is that the material type and the section form of the rubber sealing gasket are reasonably selected, the waterproof sealing technical level of the pipe jacking structure is improved, the requirements of good economy and the like are met as far as possible. At present, the elastic sealing gasket material mostly adopts single expanded rubber or non-expanded rubber, and the advantages of the two cannot be fully utilized. The section form of the elastic sealing gasket mostly adopts simple rectangles, trapezoids, olecranon shapes and the like, the upper surface and the lower surface of the elastic sealing gasket are planes, the surface stress distribution is not uniform, the section utilization rate is low, when the pipe joint has rotary deviation, the contact area between the rubber sealing gasket and the steel plate is reduced, and the waterproof effect is remarkably reduced. Therefore, the development of a novel composite elastic rubber sealing ring structure has important theoretical and engineering significance.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the technical problem that exists among the well-known art and provide a compound elasticity rubber seal structure, this structural seal is effectual, the assembly of being convenient for.

The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be: the utility model provides a compound elasticity rubber seal structure, includes middle part owner circle, outside circle and inboard circle, the middle part owner circle is made by non-inflation rubber, and the section adopts M shape structure, is equipped with outside seal groove and inboard seal groove, controls both wings middle part and is equipped with along the annular ring of circumference extension, the outside circle with the inboard circle is all made by meeting water inflation rubber, the inboard of outside circle coincide in the outside seal groove of middle part owner circle, the two forms sealing connection, the outside of inboard circle coincide in the inboard seal groove of middle part owner circle, the two forms sealing connection, the equipment back, the excircle of outside circle with the excircle of middle part owner circle is the same, the interior circle of inboard circle with the interior circle of middle part owner circle is the same.

The section of the inner side sealing groove of the middle main ring is larger than that of the outer side sealing groove of the middle main ring, and the section of the inner side ring is larger than that of the outer side ring.

The two sides of the outer circle and the two sides of the inner circle of the middle main ring as well as the outer side sealing groove and the inner side sealing groove all adopt arc structures.

The cross sections of the outer side ring and the inner side ring are oval, and the long axis of the oval extends along the length direction of the cross section of the sealing ring.

The middle main ring is made of chloroprene rubber.

The utility model has the advantages and positive effects that: the inner and outer boundaries are three arc-shaped curved surfaces, the contact effect can be effectively increased when the curved surfaces are pressed, after the curved surfaces meet water, the outer side ring and the inner side ring expand to enable the contact surface to be attached more tightly, the waterproof effect is obvious, and the waterproof performance is better. In addition, the section of the rubber sealing ring is not a solid section, the middle parts of the left wing and the right wing are provided with annular holes extending along the circumferential direction, the effective area of the section is reduced due to the arrangement of the annular holes, the assembling force in the construction process can be greatly reduced, and the construction cost is reduced. The sealing structure has excellent section form, improves the section utilization rate and can save the material consumption. Through numerical simulation and checking calculation, the contact stress of the inner boundary and the outer boundary tends to be uniform due to the cross section form, and the waterproof effect of the sealing structure in the process of generating rotary deviation can be improved.

Drawings

FIG. 1 is a schematic sectional view of the present invention;

fig. 2 is a schematic view of a cross-sectional structure applied by the present invention.

In the figure: 1. a middle main ring; 1-1, annular holes; 2. an outer ring; 3. an inner ring; 4. a type a pipe section; 5. trapezoidal neoprene rubber; 6. b-type pipe joints; 7. high-strength bolt.

Detailed Description

For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified in conjunction with the accompanying drawings as follows:

referring to fig. 1 and 2, a composite elastic rubber seal ring structure includes a middle main ring 1, an outer ring 2, and an inner ring 3.

The middle main ring 1 is made of non-expansion rubber, the section of the middle main ring is of an M-shaped structure and is provided with an outer side sealing groove and an inner side sealing groove, and annular holes 1-1 extending along the circumferential direction are formed in the middle parts of the left wing and the right wing.

The outside circle 2 with the inboard circle 3 all is made by water-swelling rubber, the inboard of outside circle 2 coincide in the outside seal groove of middle part owner circle 1, the two forms sealing connection, the outside of inboard circle 3 coincide in the inboard seal groove of middle part owner circle 1, the two forms sealing connection, the equipment back, the excircle of outside circle 2 with the excircle of middle part owner circle 1 is the same, the interior circle of inboard circle 3 with the interior circle of middle part owner circle 1 is the same.

In this embodiment, the section of the inner side sealing groove of the middle main ring 1 is larger than the section of the outer side sealing groove of the middle main ring 1, and the section of the inner side ring is larger than the section of the outer side ring, so that the sealing performance of the sealing ring can be improved. The two sides of the outer circle and the two sides of the inner circle of the middle main ring 1 as well as the outer side sealing groove and the inner side sealing groove are of arc structures, and arc boundaries are superior to linear boundaries, so that the cross section utilization rate can be improved, the assembling force in the construction process is reduced, and the assembly is facilitated. The cross section of the outer side ring 2 and the cross section of the inner side ring 3 are oval, the long axis of the oval extends along the length direction of the cross section of the sealing ring, and the sealing effect is good. The middle main ring 1 is recommended to be made of chloroprene rubber.

Please refer to fig. 2, the utility model discloses a when being used for between push pipe festival sealed, advance a type pipe festival 4 and fixed, in proper order with inboard circle 3, middle part owner circle 1 and outside circle 2 and trapezoidal chloroprene rubber 5 arrange in the seal groove of the spigot end of B type pipe festival 6, advance B type pipe festival 6 then, all can receive certain compression at the in-process rubber that advances. After the B-shaped pipe joint 6 is in place, a high-strength bolt 7 is installed, and the A-shaped pipe joint 4 and the B-shaped pipe joint 6 are reliably connected.

Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is within the scope of the present invention.

Claims

1. A composite elastic rubber sealing ring structure is characterized by comprising a middle main ring, an outer side ring and an inner side ring,

the middle main ring is made of non-expansion rubber, the section of the middle main ring adopts an M-shaped structure and is provided with an outer side sealing groove and an inner side sealing groove, the middle parts of the left wing and the right wing are provided with annular holes extending along the circumferential direction,

the outer ring and the inner ring are both made of water-swellable rubber,

the inner side of the outer side ring is inosculated in the outer side sealing groove of the middle main ring, the two are in sealing connection,

the outer side of the inner side ring is inosculated in the inner side sealing groove of the middle main ring, the inner side ring and the middle main ring form sealing connection,

after the assembly, the excircle of the outer side ring is the same as the excircle of the middle main ring, and the inner circle of the inner side ring is the same as the inner circle of the middle main ring.

2. The structure of claim 1, wherein the cross section of the inner seal groove of the middle main ring is larger than the cross section of the outer seal groove of the middle main ring, and the cross section of the inner ring is larger than the cross section of the outer ring.

3. The structure of claim 1, wherein the two sides of the outer circle and the two sides of the inner circle of the middle main ring and the outer sealing groove and the inner sealing groove are arc structures.

4. The structure of a composite elastic rubber seal ring according to claim 1, wherein the cross-sections of the outer ring and the inner ring are elliptical, and the major axis of the ellipse extends along the length direction of the cross-section of the seal ring.

5. The composite elastomeric seal ring structure of claim 1, wherein said middle main ring is made of neoprene.