CN214579444U - Sealing element of safety joint for channel steel pipe - Google Patents
Sealing element of safety joint for channel steel pipe Download PDFInfo
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- CN214579444U CN214579444U CN202023208923.6U CN202023208923U CN214579444U CN 214579444 U CN214579444 U CN 214579444U CN 202023208923 U CN202023208923 U CN 202023208923U CN 214579444 U CN214579444 U CN 214579444U
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Abstract
The sealing element of the safety joint for the channel steel pipe comprises a sealing rubber ring, wherein the sealing rubber ring comprises an outer sealing structure and an inner sealing structure; the outer sealing structure consists of an opening oblique end surface of an outer lip edge of the sealing rubber ring, an outer ring opening oblique edge, an outer convex circular ring, an outer ring and a bottom; the inner sealing structure is composed of an inner lip edge of the sealing rubber ring and an inner convex circular table. The utility model discloses an inside and outside seal of sealing rubber ring, at low high-pressure state, no matter be more flat region and open-air environment, can both be effective good seal ability, low pressure state twice is sealed, especially can still have better seal ability under the environment of open-air height unevenness.
Description
Technical Field
The utility model belongs to the technical field of the tube coupling of open-air steel pipeline, concretely relates to sealing member that safe joint is used to channel-section steel pipe.
Background
The lip-shaped sealing ring is an axial sealing ring made of pure rubber, namely an oil seal. The lip-shaped sealing ring is fixed on the shaft neck of the rotating shaft by using the holding tension of the lip-shaped sealing ring to the shaft neck, and meanwhile, a sealing pair is formed by utilizing the winding performance of the lip part and the pressing force of the lip part to the sealing, so that water and impurities are prevented from entering the rotary lubricating sealing body in the operation process of equipment, and the requirement of protecting the normal operation of the rotary shaft lubricating sealing device is met. The sealing principle is as follows: the sealing lip is mounted in the groove without external pressure, and the sealing lip is compressed by the piston rod or the cylinder wall to generate an initial contact pressure. Under the action of external pressure, the sealing lip of the lip seal is pressed to the surface to be sealed, the pressure is transmitted to the contact point through the gasket, and the pressure of the lip contact point is always greater than the liquid pressure, so that the leakage of the fluid is prevented. The lip seal has high sealing efficiency under high pressure and low pressure, has certain compensation effect on abrasion, and cannot cause quick leakage.
For the large-batch frequent connection and disassembly of pipelines at the replacement and conveying place, the frequent connection and disassembly operation is carried out between the pipelines and the connectors. The distance between oil pipelines is longer and longer, so that more and more connectors are needed to be connected, and the maintenance and replacement frequency is increased. With the complexity of military battles, oil pipelines are required to adapt to a flat environment and also to adapt to the environment of wild mountains and hills, namely low-pressure liquid conveying and high-pressure liquid conveying.
The sealing rubber ring on the existing connecting joint plays a sealing role by the elastic action of rubber, when a certain amount of relative angular displacement and corresponding axial deflection occur on the groove steel pipe, the possibility of leakage is possible, the adaptive pressure range is not wide, when the low pressure does not leak, the high pressure is unstable, and after the high pressure is stable and does not leak, the low pressure slightly leaks.
Disclosure of Invention
The utility model aims at overcoming the above-mentioned not enough of prior art, and provide a trench steel is safety joint's for pipe sealing member, improve the ability that groove steel is safety joint for pipe bearing pressure, can satisfy the low pressure and do not have the seepage, can realize bearing the ability of higher pressure again, low pressure and high pressure also can adapt to.
The technical scheme of the utility model is that: the sealing rubber ring comprises an outer sealing structure and an inner sealing structure; the outer sealing structure consists of an opening oblique end surface of an outer lip edge of the sealing rubber ring, an outer ring opening oblique edge, an outer convex circular ring, an outer ring and a bottom; the inner sealing structure is composed of an inner lip edge of the sealing rubber ring and an inner convex circular table.
The outer lip edge of the sealing rubber ring, the bottom of the sealing rubber ring and the inner end straight groove are in interference fit to form outer sealing; the bottom of the sealing rubber ring and the outer end of the inner straight groove, the opening inclined end surface and the inner end of the inner straight groove form a sealing pair, the bottom of the sealing rubber ring is tightly attached to the outer end of the inner straight groove, and after the opening inclined end surface and the inner end of the inner straight groove are in interference fit, the opening inclined end surface naturally becomes a straight surface, and the opening inclined edge of the outer ring is tightly attached to the inner diameter of the inner straight groove;
the inner lip of the inner lip edge of the sealing rubber ring is in contact with the outer diameter of the pipeline groove connecting steel pipe, and the inner convex circular truncated cone is in contact with the outer circular inclined surface of the groove pipe joint clamping ring to form inner sealing.
The root of the outer lip edge of the sealing rubber ring is intersected with the root of the inner lip edge of the sealing rubber ring, the front part of the outer lip edge and the front part of the inner lip edge are opened to form an opening, the outer ring root of the outer lip edge is provided with an outer convex circular ring, and the inner ring root of the inner lip edge is provided with an inner convex circular table; the cross section of the sealing rubber ring is of a polygonal structure, the bottom of the sealing rubber ring is a plane, the front part of the outer ring of the outer lip edge of the sealing rubber ring is an outer ring opening bevel edge, and the front part of the outer lip edge of the sealing rubber ring is an opening bevel end face.
Bearing high pressure ability when considering to use, the utility model discloses sealed rubber ring establishes interior convex round platform, plays root supporting role when bearing high-pressure state. The arrangement of the two seals of the inner seal structure and the outer seal structure of the seal rubber ring can effectively achieve good sealing capability in a low-pressure state, no matter in a flat region or in a field environment, and particularly can still achieve good sealing capability in a rugged environment in the field. The utility model discloses the setting of protruding round platform in the sealed rubber ring can realize still having better centering nature's insertability when a certain amount of relative angular displacement and corresponding axial are scratched to the slot steel pipe present.
Drawings
FIG. 1 is a diagram illustrating the usage of the present invention;
FIG. 2 is an enlarged view of M in FIG. 1;
FIG. 3 is a partial schematic view of the connector body;
FIG. 4 is a schematic structural view of a seal rubber ring;
FIG. 5 is an enlarged view of the portion N of FIG. 4;
fig. 6 is a schematic view of the grooved steel pipe and the connector body 1 in a folded state.
Detailed Description
In fig. 1-5, the safety joint for grooved steel pipes comprises a connector body 1, a grooved pipe joint snap ring 3, a steel locking ring 2, and a sealing rubber ring 4. The connector body 1 and the grooved pipe joint retainer ring should be manufactured by 35Cr or thick-walled pipes with the same strength. The steel locking ring should be made of 65Mn cold drawn spring steel wire. The seal rubber ring 4 is made of butyronitrile oil-resistant rubber or synthetic oil-resistant rubber. The hardness of the outer surface of the connector body 1 is not lower than HRC28, and the hardness of the surface of the inner R3 circular arc is not lower than HRC 32. The surface hardness of the groove pipe joint clamping ring 3 is not lower than HRC28, and the surface hardness of the steel locking ring 2 is not lower than HRC 32. The steel locking ring 2 is in a ring shape with a notch, and the inner diameter of the steel locking ring is slightly smaller than the outer diameter of the groove pipe joint at the end part of the groove connecting steel pipe in a free state.
The middle part of the inner wall of the connector body 1 is provided with a shoulder 206, the inner cavities of the connector body 1 at two sides of the shoulder 206 are mounting holes for mounting a pipeline groove connecting steel pipe 5, the mounting holes comprise a second stepped hole 205 positioned at the inner side and a first main stepped hole 204 positioned at the outer side, the outer end of the first main stepped hole 204 is chamfered to form an inner hole bevel 208, the inner end of the first main stepped hole 204 is connected with the second stepped hole 205 through a transition arc-shaped inclined plane 207, the aperture of the first main stepped hole 204 is larger than that of the second stepped hole 205, the hole wall of the first main stepped hole 204 is sequentially provided with an inner arc-shaped groove 203, an outer end straight groove 201 and an inner end straight groove 202 from outside to inside, and the inner arc-shaped groove 203 is connected to the outer side of the notch of the outer end straight groove 201. The connector body 1 has a peripheral bevel 209. The sealing rubber ring 4 is arranged in the inner end straight groove 202, and the steel locking ring 2 is arranged in the outer end straight groove 201.
When the pipeline groove connecting steel pipe 5 is connected with the connector body 1 to form a pipeline for liquid conveying, under the condition that the pipeline groove connecting steel pipe bears tension and liquid pressure, the force acts on the connector body 1 after passing through the outer arc-shaped groove 403, the steel locking ring 2 and the inner arc-shaped groove 203 of the groove pipe joint clamping ring 3 along the pipeline groove connecting steel pipe, and the force F acts on the outer end of the connector body 1 in the direction of about 45 degrees. The cambered surface fine adjustment mechanism is composed of an outer cambered groove 403 of the groove pipe joint clamping ring 3, a steel locking ring 2 and an inner cambered groove 203 of the connector body, and the steel locking ring 2 is matched with the inner/outer cambered grooves to form a matching pair. The section of the steel locking ring is circular.
The sealing rubber ring 4 adopts lip-shaped sealing, the sealing rubber ring 4 is unidirectional sealing, and the pressure direction is a concave surface unidirectional direction (as shown in the arrow direction of fig. 5). The sealing rubber ring 4 is a Y-shaped annular sealing rubber ring with an inner convex circular table at the root, has a Y-shaped annular section and is made of rubber and can bear high pressure. The lip limit is the hypotenuse in traditional Y shape seal rubber ring, considers improving and bears the high pressure ability, and seal rubber ring 4 establishes interior convex round platform 301, plays root supporting role when bearing high pressure state.
The sealing rubber ring 4 is mounted at the inner end straight groove 202 in the connector body 1: the outer lip 306 is matched with the inner end straight groove 202, the outer ring 308, the outer convex ring 307 and the outer ring opening bevel edge 305 are matched with the inner diameter of the inner end straight groove 202, and the bottom 309 and the opening bevel end face 304 are tightly matched with the two ends of the inner end straight groove 202 to play a role of outer sealing; the inner lip edge 303 is tightly pressed on the outer diameter cylindrical surface of the grooved pipe joint at the end part of the pipeline groove connection steel pipe 5, the inner lip edge 302 is linearly matched with the outer diameter cylindrical surface of the grooved pipe joint at the end part of the pipeline groove connection steel pipe 5, and the inner lip edge 302 is matched with the outer diameter cylindrical surface of the grooved pipe joint at the end part of the pipeline groove connection steel pipe, namely, the line is in contact fit with the cylindrical surface to play an inner sealing role. The outer diameter of the sealing rubber ring 4 is slightly larger than the inner diameter of the inner end straight groove 202, and the inner diameter of the inner lip 302 is slightly smaller than the outer diameter of the pipeline groove connecting steel pipe 5.
The sealing function of the sealing rubber ring 4 comprises: inner seal and outer seal.
Firstly, the outer seal is formed by an opening inclined end face 304 of an outer lip edge 306, an outer ring opening inclined edge 305, an outer convex ring 307, an outer ring 308, a bottom 309 and the inner diameter and two ends of an inner end straight groove 202, the bottom 309 of a seal rubber ring 4 is tightly attached to one end of the inner end straight groove 202, after the opening inclined end face 304 and the other end of the inner end straight groove 202 are in interference fit, the opening inclined end face 304 naturally becomes a straight face, and the outer ring opening inclined edge 305 becomes an approximate straight edge and is tightly attached to the inner diameter of the inner end straight groove 202;
in a low-pressure state, the outer diameter of the sealing rubber ring 4 is slightly larger than the inner diameter of the inner end straight groove 202, the rubber elastic force of the inclined edge 305 of the opening of the outer ring and the convex circular ring 307 tightly cling to the inner diameter of the inner end straight groove 202 to perform two sealing operations, so that the sealing operation is achieved by overcoming the low-pressure leakage, and in a high-pressure state, the inner diameter of the inner end straight groove 202 is filled with the rubber elastic body under the action of liquid pressure to perform a self-sealing function.
And secondly, the inner seal is respectively contacted with the outer diameter of the pipeline groove connecting steel pipe 5 and the outer circular inclined surface 405 of the groove pipe joint snap ring 3 through an inner lip 302 and an inner convex circular truncated cone 301 of an inner lip 303.
In a low-pressure state, the line of the inner lip 302 of the inner lip edge 303 and the outer diameter cylindrical surface of the grooved pipe joint at the end part of the pipeline grooved connection steel pipe 5 are matched with two seals, so that low-pressure leakage is overcome to achieve sealing, in a high-pressure state, the inner lip edge 303 and the inner convex circular truncated cone 301 at the root part of the inner lip edge are tightly attached to the outer diameter cylindrical surface of the grooved pipe joint under the action of liquid pressure, a self-sealing effect is achieved, at the moment, the inner lip edge is in a theoretical correct matching state (namely, a centering state), and the high-pressure sealing also achieves the best sealing effect.
In fig. 6, three safety joints 501 and two pipeline grooves are used for connecting the steel pipe 5 to form a test pipeline, two ends of the test pipeline are lifted to a height h away from the ground through a lifting rope I509 and a lifting rope II 5010, the bending angle state of the test pipeline is simulated, the heights of the two ends of the test pipeline to the ground are h1 and h2, and the distances between the middle safety joint 501 and the safety joints on the two sides are L1 and L2. When the pipeline groove connecting steel pipe 5 in the pipeline and the safety joint 501 are in a certain inclination (the using state is a field rugged environment, the groove steel pipe has a certain amount of relative angular displacement and corresponding axial deflection), the inner lip edge 303 and the inner convex truncated cone 301 at the root part thereof play a role in mainly bearing large deformation and sealing.
The inner and outer sealing of the sealing rubber ring 4 can effectively achieve good sealing capacity in a low-pressure state and a high-pressure state no matter in a flat region or in a field environment, and the sealing rubber ring can achieve good sealing capacity in a low-pressure state and two sealing modes, particularly in a field rugged environment.
Claims (3)
1. The utility model provides a sealing member that safe joint is used to trench steel pipe which characterized in that: the sealing structure comprises a sealing rubber ring (4), wherein the sealing rubber ring (4) comprises an outer sealing structure and an inner sealing structure; the outer sealing structure consists of an opening inclined end face (304) of an outer lip edge (306) of the sealing rubber ring (4), an outer ring opening inclined edge (305), an outer convex circular ring (307), an outer ring (308) and a bottom (309); the inner sealing structure is composed of an inner lip (302) of an inner lip edge (303) of the sealing rubber ring (4) and an inner convex circular table (301).
2. The seal of a safety joint for a grooved steel pipe according to claim 1, characterized in that: the outer lip edge (306) of the sealing rubber ring (4), the bottom (309) of the sealing rubber ring (4) and the inner end straight groove (202) are in interference fit to form outer sealing; the bottom (309) of the sealing rubber ring (4) and the outer end of the inner end straight groove (202) as well as the opening inclined end surface (304) and the inner end of the inner end straight groove (202) form a sealing pair, the bottom (309) of the sealing rubber ring (4) is tightly attached to the outer end of the inner end straight groove (202), after the opening inclined end surface (304) and the inner end of the inner end straight groove (202) are in interference fit, the opening inclined end surface (304) naturally becomes a straight surface, and the outer ring opening inclined edge (305) is tightly attached to the inner diameter of the inner end straight groove (202);
an inner lip (302) of an inner lip edge (303) of the sealing rubber ring (4) is in contact with the outer diameter of the pipeline groove connecting steel pipe (5), and an inner convex circular table (301) is in contact with an outer circular inclined surface (405) of the groove pipe joint clamping ring (3) to form inner sealing.
3. The seal of a safety joint for a grooved steel pipe according to claim 1, characterized in that: the root of an outer lip edge (306) of the sealing rubber ring (4) is intersected with the root of an inner lip edge (303) of the sealing rubber ring (4), the front part of the outer lip edge (306) and the front part of the inner lip edge (303) are opened to form an opening, an outer convex circular ring (307) is arranged at the root of an outer ring (308) of the outer lip edge (306), and an inner convex circular table (301) is arranged at the root of an inner ring of the inner lip edge (303); the cross section of the sealing rubber ring (4) is of a polygonal structure, the bottom (309) of the sealing rubber ring (4) is a plane, the front part of an outer ring (308) of an outer lip edge (306) of the sealing rubber ring (4) is an outer ring opening bevel edge (305), and the front part of the outer lip edge (306) of the sealing rubber ring (4) is an opening bevel end surface (304).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023208923.6U CN214579444U (en) | 2020-12-28 | 2020-12-28 | Sealing element of safety joint for channel steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023208923.6U CN214579444U (en) | 2020-12-28 | 2020-12-28 | Sealing element of safety joint for channel steel pipe |
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| Publication Number | Publication Date |
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| CN214579444U true CN214579444U (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023208923.6U Active CN214579444U (en) | 2020-12-28 | 2020-12-28 | Sealing element of safety joint for channel steel pipe |
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| CN (1) | CN214579444U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704695A (en) * | 2022-02-28 | 2022-07-05 | 芜湖骏航机电科技有限公司 | Rolling connection type lip-shaped sealing joint |
-
2020
- 2020-12-28 CN CN202023208923.6U patent/CN214579444U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704695A (en) * | 2022-02-28 | 2022-07-05 | 芜湖骏航机电科技有限公司 | Rolling connection type lip-shaped sealing joint |
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