CN212338541U - Expansion joint for full vacuum system - Google Patents
Expansion joint for full vacuum system Download PDFInfo
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- CN212338541U CN212338541U CN202020365441.2U CN202020365441U CN212338541U CN 212338541 U CN212338541 U CN 212338541U CN 202020365441 U CN202020365441 U CN 202020365441U CN 212338541 U CN212338541 U CN 212338541U
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- expansion joint
- flange
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- resistant
- resistant sleeve
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Abstract
The utility model discloses an expansion joint for a full vacuum system, which is characterized in that the left end of an expansion joint body is provided with a left flange, and the right end is provided with a right flange; the outer circumferences of the left flange and the right flange are respectively provided with a limiting lug plate with a limiting screw hole, the limiting pull rod penetrates through the limiting screw holes, and both sides of the limiting lug plate are respectively provided with a spherical gasket, a spherical nut and a locking nut; a compression-resistant sleeve is arranged in a through hole between the left flange and the right flange, one end of the compression-resistant sleeve is flush with the outer side of the left flange or the right flange, and the other end of the compression-resistant sleeve extends to the outside of the end face of the flange; the middle section of the expansion joint main body is provided with an inwards concave annular body, one side of the expansion joint main body, which is in contact with the medium, is provided with an inner rubber layer, and the other side of the expansion joint main body is provided with an outer rubber layer; the inner concave ring body of the expansion joint body and the corners of the horizontal sections at the two sides are provided with compression-resistant reinforcing rings. The device has the advantages of compact structure, good stability, safety, reliability and long service life; effectively prevent the rubber expansion joint from generating abnormal deformation, and has good use effect.
Description
Technical Field
The utility model relates to an expansion joint's field especially relates to an expansion joint for full vacuum system.
Background
The traditional rubber expansion joint adopts a convex hollow spherical groove structure as a pipeline, equipment and a connecting compensation element among the pipelines and the equipment, and is the most important system compensation element for ensuring the safe and reliable operation of the pipeline and the equipment system so as to ensure the safety and the high reliability of the operation of the system. The damping device is mainly applied to medium pipelines such as liquid, gas, powder and the like, and has the functions of reducing or buffering the axial, transverse and angle changes generated by external force action on related equipment such as a pump, a fan, a pipeline and the like; absorb the deformation or stress deformation of the piping caused by temperature change, elastic action, axial displacement, load stress, abrasion or foundation settlement; damping or absorbing vibration or noise of the piping system.
When the rubber expansion joint in the prior art is applied to a full-vacuum use environment, the convex hollow spherical groove can cause local or total shriveling and sinking of the spherical weak part due to the fact that the external pressure is greater than the internal pressure of a system, repeated shriveling or rebounding is performed in the process of alternating pressure change, the root of the hollow spherical is bent, rubbed and heated to generate fatigue fracture, and finally the rubber expansion joint is broken and damaged; as the improvement of the anti negative pressure structure of a traditional rubber expansion joint, increase anti negative pressure strengthening ring in the hollow spherical structure of evagination, it brings two harm: firstly, the reinforcing ring can corrode and pollute media, and secondly, the media corrode the reinforcing ring to generate sharp notches to damage the rubber acceleration expansion joint; therefore, it is necessary to design an expansion joint suitable for a full vacuum environment.
Disclosure of Invention
The utility model aims at providing an expansion joint for a full vacuum system, which has simple structure, good stability, long service life, safety and reliability; the technical problem is solved.
In order to realize the technical purpose, reach foretell technical requirement, the utility model discloses the technical scheme who adopts is: an expansion joint for a full vacuum system comprises an expansion joint body; the method is characterized in that: the left end of the expansion joint body is provided with a left flange, and the right end of the expansion joint body is provided with a right flange; the outer circumferences of the left flange and the right flange are respectively provided with a limiting lug plate with a limiting screw hole, the limiting pull rod penetrates through the limiting screw holes, and both sides of the limiting lug plate are respectively provided with a spherical gasket, a spherical nut and a locking nut; a compression-resistant sleeve is arranged in a through hole between the left flange and the right flange, one end of the compression-resistant sleeve is flush with the outer side of the left flange or the right flange, and the other end of the compression-resistant sleeve extends to the outside of the end face of the flange; the middle section of the expansion joint main body is provided with an inwards concave annular body, one side of the expansion joint main body, which is in contact with the medium, is provided with an inner rubber layer, and the other side of the expansion joint main body is provided with an outer rubber layer; and the compression-resistant reinforcing rings are arranged at the corners of the concave annular body of the expansion joint body and the horizontal sections at the two sides.
Preferably: the compression-resistant sleeve and the left flange and the compression-resistant sleeve and the right flange are connected by welding.
Preferably: the pressure-resistant sleeve and the left flange and the pressure-resistant sleeve and the right flange are integrally formed.
Preferably: the left flange, the right flange, the compression-resistant sleeve and the compression-resistant reinforcing ring are all arranged on the inner rubber layer.
Preferably: the inner rubber layer comprises inner anti-corrosion and wear-resistant rubber 2-1 and an inner reinforcing fabric reinforcing cloth layer 2-2; the outer rubber layer comprises an outer weather-proof anti-aging rubber layer and an outer reinforcing fabric layer.
Preferably: the compression-resistant reinforcing rings are arranged in one or more than one mode.
Preferably: the concave ring bodies are arranged into one or more than one, one side of the concave surface of each concave ring body is provided with a V-shaped opening, and one side of the convex surface of each concave ring body is provided with a hemisphere.
The utility model has the advantages that; an expansion joint for a full vacuum system is characterized in that an inward concave ring body is arranged at the middle section of a main body of the expansion joint, so that the expansion joint is effectively prevented from exceeding the elastic deformation and exceeding the range for use, the vibration transmission and the noise transmission of the system are weakened, and the deformation, the deflection and the additional stress of the system are absorbed; an inner rubber layer is arranged on one side of the expansion joint body, which is in contact with the medium, and an outer rubber layer is arranged on the other side of the expansion joint body; the corrosion resistance and the wear resistance are greatly improved; the anti-aging performance is also improved, and the structural stability is enhanced; the compression-resistant reinforcing rings are arranged at the corners of the concave annular body of the expansion joint body and the horizontal sections at the two sides; the inner holes of the left flange and the right flange are provided with pressure-resistant sleeves; the compression-resistant reinforcing ring and the compression-resistant casing pipe effectively improve the vacuum-resistant grade and the operation stability of the expansion joint; the utility model has compact structure, good stability, safety, reliability and long service life; effectively prevent the rubber expansion joint from generating abnormal deformation, and has good use effect.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a partial enlarged view of the expansion joint body of the present invention;
in the figure: 1. a compression-resistant reinforcing ring; 2. an inner rubber layer; 2-1, an inner layer anti-corrosion wear-resistant rubber layer; 2-2, inner layer reinforcing fabric layer; 3. an outer protective rubber layer; 3-1, outer weather-proof anti-aging rubber layer; 3-2, reinforcing fabric layer of outer layer reinforcing fabric; 4. a limiting pull rod; 5. locking the nut; 6. a ball nut; 7. a spherical spacer; 8. a limiting lug plate; 9. a limiting screw hole; 10. an expansion joint body; 10-1. a concave ring body; 10-2, horizontal section; 11. a left flange; 12. a right flange; 13. a pressure resistant bushing.
Detailed Description
In order to make the object, technical solution and beneficial technical effects of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments;
in the drawings: an expansion joint for a total vacuum system comprises an expansion joint body 10; the method is characterized in that: the left end of the expansion joint body 10 is provided with a left flange 11, and the right end of the expansion joint body is provided with a right flange 12; the outer circumferences of the left flange 11 and the right flange 12 are respectively provided with a limiting lug plate 8 with a limiting screw hole 9, the limiting pull rod 4 penetrates through the limiting screw hole 9, and the two sides of the limiting lug plate 8 are respectively provided with a spherical gasket 7, a spherical nut 6 and a locking nut 5; a pressure-resistant sleeve 13 is arranged in a through hole between the left flange 11 and the right flange 12, one end of the pressure-resistant sleeve 13 is flush with the outer side of the left flange 11 or the right flange 12, and the other end of the pressure-resistant sleeve extends to the outside of the end face of the flange; the middle section of the expansion joint main body 10 is provided with a concave annular body 10-1, one side of the expansion joint main body 10, which is contacted with a medium, is provided with an inner rubber layer 2, and the other side is provided with an outer rubber layer 3; the compression-resistant reinforced ring 1 is arranged at the corner of the concave ring body 10-1 of the expansion joint body 10 and the horizontal sections 10-2 at the two sides.
The compression-resistant sleeve 13 and the left flange 11 and the compression-resistant sleeve 13 and the right flange 12 are connected by welding; the compression sleeve 13 and the left flange 11, and the compression sleeve 13 and the right flange 12 are integrally formed; the left flange 11, the right flange 12, the compression-resistant sleeve 13 and the compression-resistant reinforcing ring 1 are all arranged on the inner rubber layer; the inner rubber layer 2 comprises inner anti-corrosion wear-resistant rubber 2-1 and an inner reinforcing fabric reinforcing cloth layer 2-2; the outer rubber layer 3 comprises an outer weather-resistant anti-aging rubber layer 3-1 and an outer reinforcing fabric cloth layer 3-2; the compression-resistant reinforced rings 1 are arranged into one or more than one ring; the concave ring body 10-1 is provided with one or more concave openings, one side of the concave surface of the concave ring body 10-1 is provided with a V-shaped opening, and one side of the convex surface is provided with a hemisphere shape.
The utility model discloses a concrete implementation: limiting action principle of operation: set up spacing screw 9 on the spacing otic placode, spacing otic placode has two kinds of connected modes: the first is that the limit lug plate and the expansion joint flange adopt a welding integral connection mode; the other is that the limit lug plate is provided with a limit screw hole and a bolt hole which is matched with the installation mating flange, and a split connection mode that the installation mating flange is fixed on the installation mating flange by a connecting bolt is adopted; the limiting pull rod 4 penetrates through the limiting screw hole 9 to be matched and fixed with the limiting lug plate, and spherical gaskets, spherical nuts and locking nuts are arranged on two sides of the limiting lug plate so as to ensure that the expansion joint cannot excessively deform and does not interfere with the movement in all directions under any condition; thereby ensuring that the service performance of the expansion joint does not fail in advance to influence the service life
Deformation displacement action working principle: the concave annular body of the expansion joint body mainly meets the design requirements of axial displacement, radial displacement and angular displacement, prevents the expansion joint from exceeding the elastic deformation and exceeding the range, weakens the vibration transmission and noise transmission of a system, and absorbs the deformation, deflection and additional stress of the system.
Working principle of anticorrosion and compression resistance: the inner layer rubber of the expansion joint contacted with the working medium adopts corrosion-resistant and wear-resistant rubber to resist the long-term chemical corrosion action and the wear action of the working medium so as to keep chemical stability, the inner layer reinforced fabric reinforcing cloth 2-2 and the outer layer reinforced fabric reinforcing cloth 3-2 act together to resist the system pressure impact so as to achieve the corresponding vacuum degree resistance level, and the whole vulcanization bonding is adopted between the rubber and the rubber, between the rubber and the metal, between the reinforced fabric reinforcing cloth and the rubber, between the reinforced fabric reinforcing cloth and the metal, and the like to form the whole body so as to further improve the compression strength level; the compression-resistant reinforcing ring 1 and the compression-resistant sleeve 13, and the compression-resistant sleeve 13 and the flange are connected by welding or integral forging; has auxiliary and reinforcing effects on further improving the vacuum degree resistance grade of the expansion joint
The working principle of the flexible bending anti-fatigue action is as follows: the flexible bending function of the expansion joint is realized by utilizing the effective stretching and displacement of the concave ring body of the expansion joint body, the elastic deformation and deformation resilience of the rubber, and the rubber connection between the compression-resistant reinforcing ring and the compression-resistant sleeve, and meanwhile, the fatigue heat generation of the expansion joint is reduced in the repeated bending fatigue process, the performance reduction caused by the heat generation is reduced, the service life of the expansion joint is prolonged, and the service life of the expansion joint is prolonged
The utility model discloses the expansion joint structure mainly improves the anti vacuum level of expansion joint and operating stability through setting up resistance to compression reinforcing ring and resistance to compression sleeve pipe, the flexible coupling through resistance to compression reinforcing ring and resistance to compression sheathed tube rubber and reinforcing fabric reinforcement cloth makes its flexibility and the intensity that has increased the expansion joint under the condition that the resistance to compression grade does not descend, the anti fatigue motion number of times of expansion joint has been improved, the life of expansion joint has been prolonged, limit structure's use can prevent that excessive deformation under the various operating modes from making its performance descend, thereby the fail safe nature has been guaranteed.
The utility model discloses realize that the proof test: the EPDM rubber with excellent weather resistance, ultraviolet resistance, ozone resistance and flexural fatigue resistance is used for replacing the natural rubber NR of the rubber expansion joint and the inner reinforcing cord fabric in the prior art to carry out frictioning adhesion and a two-stage low-temperature long-time vulcanization process of a peroxide bridging agent and an insoluble sulfur compound vulcanizing agent, so that the aging service life is fully ensured; in order to improve the bending fatigue performance and improve the compressive strength grade, a compressive reinforcement ring 1 is arranged at the corner of the concave ring body 10-1 and the horizontal sections 10-2 at the two sides of the rubber expansion joint body 10 of the full vacuum system; the compression resistant ring, the fixing ring and the inner embedded layer adopt a separation structure, and the inner rubber, the outer rubber and the inner reinforcing cloth are integrally vulcanized and are bonded with the metal fixing ring, the inner embedded layer and the compression resistant ring into a whole, so that the flexural fatigue aging performance is improved; the product is verified by a laboratory vacuum pumping test of-0.095 to-0.1 MPa, a matching project of a large vacuum pump unit system and an actual project of a steam extraction pipeline (running of a vacuum-full vacuum system) of a steam turbine of a large power plant that the rubber expansion joint for the full vacuum system does not generate abnormal deformation, the use effect is good, and the service life of the rubber expansion joint is more than 5 times that of the traditional rubber expansion joint.
The foregoing examples are given for the purpose of illustrating the present invention in a clear and non-restrictive manner, and it will be apparent to those skilled in the art that variations and modifications of the present invention may be made in other variations and modifications based on the foregoing description, and it is not necessary or necessary to exhaustively enumerate all embodiments, and all such variations and modifications as are obvious and desirable in the art are within the scope of the present invention.
Claims (7)
1. An expansion joint for a total vacuum system includes an expansion joint body (10); the method is characterized in that: the left end of the expansion joint body (10) is provided with a left flange (11), and the right end of the expansion joint body is provided with a right flange (12); the outer circumferences of the left flange (11) and the right flange (12) are respectively provided with a limiting lug plate (8) with a limiting screw hole (9), the limiting pull rod (4) penetrates through the limiting screw hole (9), and both sides of the limiting lug plate (8) are respectively provided with a spherical gasket (7), a spherical nut (6) and a locking nut (5); a pressure-resistant sleeve (13) is arranged in a through hole in the middle of the left flange (11) and the right flange (12), one end of the pressure-resistant sleeve (13) is flush with the outer side of the left flange (11) or the right flange (12), and the other end of the pressure-resistant sleeve extends to the outside of the end face of the flange; the middle section of the expansion joint body (10) is provided with an inwards concave annular body (10-1), one side of the expansion joint body (10) contacting with the medium is provided with an inner rubber layer (2), and the other side is provided with an outer rubber layer (3); the compression-resistant reinforced ring (1) is arranged at the corner of the concave ring body (10-1) of the expansion joint body (10) and the horizontal sections (10-2) at the two sides.
2. The expansion joint for an all-vacuum system according to claim 1, wherein: the compression-resistant sleeve (13) and the left flange (11) and the compression-resistant sleeve (13) and the right flange (12) are connected by welding.
3. The expansion joint for an all-vacuum system according to claim 1, wherein: the pressure-resistant sleeve (13) and the left flange (11) and the pressure-resistant sleeve (13) and the right flange (12) are integrally formed.
4. The expansion joint for an all-vacuum system according to claim 1, wherein: the left flange (11), the right flange (12), the compression-resistant sleeve (13) and the compression-resistant reinforcing ring (1) are all arranged on the inner rubber layer.
5. The expansion joint for an all-vacuum system according to claim 4, wherein: the inner rubber layer (2) comprises inner anti-corrosion wear-resistant rubber (2-1) and an inner reinforcing fabric reinforcing cloth layer (2-2); the outer rubber layer (3) comprises an outer weather-resistant anti-aging rubber layer (3-1) and an outer reinforcing fabric cloth layer (3-2).
6. The expansion joint for an all-vacuum system according to claim 1, wherein: the compression-resistant reinforced ring (1) is arranged into one or more than one.
7. The expansion joint for an all-vacuum system according to claim 1, wherein: the concave ring bodies (10-1) are arranged into one or more than one, one side of the concave surface of each concave ring body (10-1) is provided with a V-shaped opening, and one side of the convex surface is provided with a hemisphere shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020365441.2U CN212338541U (en) | 2020-03-21 | 2020-03-21 | Expansion joint for full vacuum system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020365441.2U CN212338541U (en) | 2020-03-21 | 2020-03-21 | Expansion joint for full vacuum system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212338541U true CN212338541U (en) | 2021-01-12 |
Family
ID=74085886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020365441.2U Expired - Fee Related CN212338541U (en) | 2020-03-21 | 2020-03-21 | Expansion joint for full vacuum system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212338541U (en) |
-
2020
- 2020-03-21 CN CN202020365441.2U patent/CN212338541U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210112 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |