CN201953991U

CN201953991U - C-shaped sealing ring

Info

Publication number: CN201953991U
Application number: CN201020648032XU
Authority: CN
Inventors: 郑安力
Original assignee: TERRENCE TRUBILITY GAS EQUIPMENT CO Ltd
Current assignee: Terrence Energy Co., Ltd.
Priority date: 2011-04-27
Filing date: 2011-04-27
Publication date: 2011-08-31
Anticipated expiration: 2021-04-27

Abstract

The utility model relates to a sealing ring, in particular to a C-shaped sealing ring. The C-shaped sealing ring comprises an elastic sealing ring main body (1) on which an inner sunken slot (2) is formed; the cross section of the elastic sealing ring main body (1) is C-shaped; and a limiting spring (3) is arranged in the elastic sealing ring main body (1). The structural design of the C-shaped sealing ring is ingenious; as the inner sunken slot is formed on the elastic sealing ring main body, a hollow cavity formed in the inner sunken slot faces a pressure source during use of the C-shaped sealing ring; the inner sunken slot stressed by air pressure swells and deforms to attach to a sealing surface; the pressure is higher, the attachment is more compact, and the sealing effect is better; moreover, the limiting spring is arranged in the elastic sealing ring main body, so the elastic sealing ring main body can be prevented from being over-deformed under stress and falling off from the sealing slot, and the sealing can work still. The C-shaped sealing ring has pressurizing, self-locking and sealing functions, simple structure, reliable sealing, high safety, good sealing quality, long service life and high cost performance.

Description

C shape seal ring

Technical field

The utility model relates to a kind of seal ring, particularly a kind of C shape seal ring.The utility model is applicable to corollary equipment technical fields such as pressurized container, pressure piping, is particularly useful for fast-opening blind or similar sealing occasion.

Background technique

In corollary equipments such as pressurized container, pressure piping, particularly fast-opening blind or similar sealing occasion, seal ring must reach very strictness and higher requirement as the important Sealing that generally uses, and the quality of seal ring airtight quality is directly connected to the reliability and the Security of corollary equipments such as pressurized container, pressure piping.The seal ring that uses all is traditional seal rings at present, and what generally adopt is O shape circle, belongs to the forced seal category, and existing seal ring exists following defective: working life is short, and can't reuse.Particularly for the more special occasion of conditions such as fast-opening blind, O shape circle is subjected to the outside pressure of interior media on the one hand, simultaneously for guaranteeing enough sealings, also to be subjected to the pretightening force of sealing configuration effect on the other hand, and require pretightening force necessity greater than pressure medium, can guarantee sealing effect.Yet, because this sealing configuration is had relatively high expectations to seal groove machining accuracy and surface roughness that seal ring is installed, but in fact the seal groove quality is difficult to guarantee, often occur taking place owing to the seal groove machining accuracy causes the hypodynamic problem of pretension inadequately, particularly bigger for bore, the use occasion that pressure is higher, O-ring seals is under the effect of the internal pressure of being everlasting, break away from easily seal groove and be extruded above plastic deformation, finally cause seal failure, situation about leaking air descends the reliability of sealing and Security.

Along with corollary equipments such as pressurized container, pressure piping gradually to the development of heavy caliber, high pressure direction, also more and more higher to the requirement of sealing, common O shape circle can not satisfy the needs of actual use far away.Under this situation, be badly in need of a kind of seal ring that can meet the demands.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of simple in structure, cost performance is high, long service life, C shape seal ring that airtight quality is good.

Realize that the above-mentioned purpose technological scheme is: a kind of C shape seal ring, include the elastic seal ring body, have inner groovy on the described elastic seal ring body, the shape of cross section of elastic seal ring body is a C shape.

Further, be provided with limit spring in the described elastic seal ring body.

Further, the outer contour of the C shape cross section of described elastic seal ring body is connected in sequence mutually by a line, No. two lines, No. three lines, the indent line of rabbet joint and No. four lines, a line is a vertical line, No. two line is the middle horizontal line that has the indent circular arc line, No. three lines are the oblique line of abduction, No. four lines are the assemble line that horizontal line and abduction oblique line are formed, and the indent line of rabbet joint is between No. three lines and No. four lines, and the indent line of rabbet joint be the assemble line of the rectilinear(-al) at the circular arc line of centre and two ends.

Further, the material of described elastic seal ring body is a rubber.

Further, the angle α between described No. two lines and No. three lines is 100 °, and the angle β in No. four lines between horizontal line and the abduction oblique line is 145 °.

Further, the indent depth H 1 of the indent circular arc line in the middle of described No. two lines is 0.5mm, and the straight length H2 at indent line of rabbet joint two ends is 0.5mm.

After adopting technique scheme, have a lot of benefits: simple in structure, cost performance is high, long service life, airtight quality are good.The design of the utility model C shape ring structure is ingenious, has inner groovy on the elastic seal ring body, when the utility model uses, the cavity that inner groovy forms is towards pressure source, and inner groovy is subjected to the effect of gas pressure, the meeting dilatancy, applying sealing surface, pressure are high more, and it is tight more to fit, sealing effect is just good more, the utlity model has supercharging self-tightening sealing function, the utility model is simple in structure, seals reliable and secure property height, airtight quality is good, long service life; Simultaneously structure of the present utility model is convenient to the elastic seal ring body and is made full use of elastic characteristic and carry out self deformation and resilience, has realized repeated use, and this has not only reduced user cost, has improved cost performance, has also prolonged working life greatly.The limit spring that is provided with in the utility model elastic seal ring body in addition, can guarantee that under high pressure the utility model bulk strength is better, effectively prevent transition distortion under the pressurized situation and break away from seal groove, can not cause seal failure, prolong long service life of the present utility model, improve the reliability and the Security of sealing.The utility model is simple in structure, and fabricating cost is low, and long service life seals reliable and secure property height, and airtight quality is good, and cost performance is very high.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A sectional drawing of Fig. 1;

Fig. 3 is state and the stressing conditions schematic representation installed and used of the present utility model.

Embodiment

Below in conjunction with drawings and Examples the utility model is described in further detail.

Embodiment

To shown in Figure 2, a kind of C shape seal ring includes elastic seal ring body 1 as Fig. 1, and the material of elastic seal ring body 1 is a rubber.Be embedded with limit spring 3 in the elastic seal ring body 1.Have inner groovy 2 on the elastic seal ring body 1, the shape of cross section of elastic seal ring body 1 is a C shape.The outer contour of the C shape cross section of elastic seal ring body 1 is connected in sequence mutually by line 1-1, No. two line 1-2, No. three line 1-3, indent line of rabbet joint 1-5 and No. four line 1-4.A line 1-1 is a vertical line; No. two line 1-2 are the middle horizontal line that has the indent circular arc line, and the indent depth H 1 of the indent circular arc line of No. two line 1-2 centres is 0.5mm; No. three line 1-3 are the oblique line of abduction; No. four line 1-4 are the assemble line that horizontal line and abduction oblique line are formed; Indent line of rabbet joint 1-5 is between No. three line 1-3 and No. four line 1-4, and indent line of rabbet joint 1-5 is the assemble line of the rectilinear(-al) at middle circular arc line and two ends, and the straight length H2 at indent line of rabbet joint 1-5 two ends is 0.5mm.Angle α between described No. two line 1-2 and No. three line 1-3 is 100 °, and the angle β among No. four line 1-4 between horizontal line and the abduction oblique line is 145 °.A line 1-1 and No. two line 1-2 connecting parts are round-corner transition, and No. two line 1-2 and No. three line 1-3 connecting parts are round-corner transition.Elastic seal ring body 1 forms vertical surface with a line 1-1; Form the middle horizontal plane that has interior concaved circular cambered surface with No. two line 1-2; Inclined-plane with No. three line 1-3 formation abductions; Form level with No. four line 1-4 and face the combinating face that adds the formation of abduction inclined-plane directly; Form the middle circle cambered surface with indent line of rabbet joint 1-5 and add the combinating face that two ends are faced directly.Limit spring 3 is inlaid in the intersection of vertical surface that line 1-1 forms and the straight horizontal face portion that forms with No. four line 1-4.

In addition to the implementation, the material of elastic seal ring body 1 of the present utility model can also be selected other elastic materials such as silica gel for use.

When the utility model uses (referring to Fig. 3, arrow among Fig. 3 is represented airflow direction), the width of seal groove 4 is advisable than the little 0.2mm～0.5mm of width W of the present utility model, after in the utility model is installed to seal groove 4, the abduction inclined-plane that the utility model forms with No. three line 1-3 will be subjected to the side squeezing action of seal groove 4 and shrink, it tightly is pressed on the side of seal groove 4 on the abduction inclined-plane that under the elastic reaction of rubber No. three line 1-3 is formed, and forms self-tightening sealing.Little 0.5 mm of the aspect ratio of seal groove 4 height H of the present utility model～0.7mm is advisable, after end cover 5 covers, the abduction chamfered portion that the utility model forms with No. four line 1-4 is subjected to the extruding of end cover 5 and shrinks, it will tightly being pressed on the sealing surface of end cover 5 with the abduction chamfered portion that No. four line 1-4 form under the elastic reaction of rubber, forms self-tightening sealing equally; When the internal tank pressurising, partial pressure enters in the cavity of the utility model inner groovy 2 by the gap of 5 of seal groove 4 and end covers, and make its expansion equably, the abduction chamfered portion that the utility model is formed with No. four line 1-4 is to the extruding of end cover 5 sides, and the abduction inclined-plane that No. three line 1-3 are formed pushes to seal groove 4 inboards (being a side).Internal pressure is high more, and squeezing action is just strong more, and it is tight more to fit, and the sealing effect that reaches is just better; When internal pressure is higher, the utility model will move to seal groove 4 outsides (being the b side) under the effect of pressure, limit spring 3 will be close to the outside of seal groove 4 this moment, prevent that the utility model from continuing to move, guarantee the utility model can not break away from seal groove 4 and be extruded above plastic deformation, prevent seal failure, guarantee the bulk strength of high pressure lower seal; When the utility model internal pressure disappears, end cover 5 is opened, and after from seal groove 4, taking out the utility model, owing to have cavity in the utility model inner groovy 2, also having No. two line 1-2 is the interior concaved circular cambered surface that middle concave circular arc line forms, and makes the utility model have the surplus capacity of deformation, can not produce plastic deformation owing to being subjected to excessive compression, can make the utility model return to original state fully, therefore can reuse.

The utility model is not limited to the foregoing description, and the technological scheme that all employings are equal to replacement or equivalence replacement formation all belongs to the claimed scope of the utility model.

Claims

1. a C shape seal ring includes elastic seal ring body (1), it is characterized in that: have inner groovy (2) on the described elastic seal ring body (1), the shape of cross section of elastic seal ring body (1) is a C shape.

2. C shape seal ring according to claim 1 is characterized in that: be provided with limit spring (3) in the described elastic seal ring body (1).

3. C shape seal ring according to claim 1, it is characterized in that: the outer contour of the C shape cross section of described elastic seal ring body (1) is by a line (1-1), No. two lines (1-2), No. three lines (1-3), the indent line of rabbet joint (1-5) and No. four lines (1-4) are connected in sequence mutually, a line (1-1) is a vertical line, No. two lines (1-2) are the middle horizontal line that has the indent circular arc line, No. three lines (1-3) are the oblique line of abduction, No. four lines (1-4) are the assemble line that horizontal line and abduction oblique line are formed, the indent line of rabbet joint (1-5) is positioned between No. three lines (1-3) and No. four lines (1-4), and the indent line of rabbet joint (1-5) is the assemble line of the rectilinear(-al) at middle circular arc line and two ends.

4. C shape seal ring according to claim 1 is characterized in that: the material of described elastic seal ring body (1) is a rubber.

5. C shape seal ring according to claim 3 is characterized in that: the angle α between described No. two lines (1-2) and No. three lines (1-3) is 100 °, and the angle β in No. four lines (1-4) between horizontal line and the abduction oblique line is 145 °.

6. C shape seal ring according to claim 3 is characterized in that: the indent depth H 1 of the indent circular arc line in the middle of described No. two lines (1-2) is 0.5mm, and the straight length H2 at the indent line of rabbet joint (1-5) two ends is 0.5mm.