CN113202990A - Self-compensating high-temperature high-pressure joint, connecting device and operation method - Google Patents
Self-compensating high-temperature high-pressure joint, connecting device and operation method Download PDFInfo
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- CN113202990A CN113202990A CN202110483111.2A CN202110483111A CN113202990A CN 113202990 A CN113202990 A CN 113202990A CN 202110483111 A CN202110483111 A CN 202110483111A CN 113202990 A CN113202990 A CN 113202990A
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 210000004907 gland Anatomy 0.000 claims description 18
- 238000011017 operating method Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 12
- 239000007789 gas Substances 0.000 description 8
- 239000011324 bead Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/0206—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the collar not being integral with the pipe
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints With Pressure Members (AREA)
Abstract
The invention provides a self-compensating high-temperature and high-pressure joint, a connecting device and an operation method, wherein the self-compensating high-temperature and high-pressure joint comprises the following components: the high-temperature high-pressure connector, the interface pressing cap, the two disc spring connectors and the high-temperature high-pressure connector pressing cover are arranged on the high-temperature high-pressure connector; the high-temperature high-pressure joint is inserted into the interface pressing cap, the two disc springs are oppositely arranged in the interface pressing cap, the high-temperature high-pressure joint pressing cap is arranged in the interface pressing cap, and the high-temperature high-pressure joint is connected with the high-temperature high-pressure joint pressing cap through threads; the pretightening force of the two disc springs ensures that the threads of the self-compensation high-temperature and high-pressure joint device can still keep the tight connection of the air pipe joint even if the threads expand under the high-temperature environment (650 ℃) or deform under the high-pressure environment (40MPa), and the self-compensation high-temperature and high-pressure joint device is used for sealing and connecting the air pipes under the high-temperature and high-pressure environment.
Description
Technical Field
The invention relates to the field of air pipe joints, in particular to a self-compensation high-temperature and high-pressure joint, a connecting device and an operation method, and particularly relates to a self-compensation high-temperature and high-pressure joint with a function of automatically compensating thread deformation defects in a high-temperature and high-pressure environment and an operation method.
Background
The connection airtightness at the gas pipe joint has a crucial influence on the safety and economy of gas transportation. In a common air pipe joint, under a high-temperature environment, threads at the joint of an air passage expand due to heating; under a high-pressure environment, the threads can deform due to high pressure; similar problems occur when high temperature, high pressure gases are transported in the trachea. When the temperature and the pressure at the joint exceed certain limits, the joint thread deforms, and the sealing effect becomes poor. Gas leaks from the gaps between the threads of the connector, resulting in gas loss during transportation. If the transported gas is toxic, inflammable, corrosive and other harmful gas, it will threaten the surrounding facilities and personnel. Therefore, it is necessary to design a joint that can maintain good airtightness under high-temperature and high-pressure environments.
Patent document CN202689965U introduces an airtight oil pipe screwed joint suitable for high-temperature and high-pressure gas well, including male screwed joint and female screwed joint, the external screw thread includes first order external screw thread and second level external screw thread, the root of first order external screw thread is equipped with the antitorque circular bead of outer vice, and the internal thread includes first order internal thread and second level internal thread, and the tip of first order internal thread is equipped with the antitorque circular bead of interior vice, be equipped with the outer conical surface sealing surface of second level between antitorque circular bead of outer vice and the second level external screw thread, be equipped with the sealing surface of the inner conical surface of second level between the antitorque circular bead of second level internal thread and the interior vice antitorque circular bead of second level, be metal interference fit between the sealing surface of outer conical surface of second level and the sealing surface of the inner conical surface of second level, constitute the sealing structure of second level. This patent design has multistage screw thread, and the design of every grade screw thread all has detailed requirement, and actual processing is comparatively complicated, mainly used oil development field moreover.
Patent document CN108506606A provides a high temperature and pressure resistant sealing joint, which includes a joint body; the two ends of the connector body are coaxially arranged in an equal diameter mode, the two ends of the connector body are coaxially arranged with the two locking nuts, the two compression cones are hermetically connected between the connector body and the locking nuts, and the compression cones are coaxially arranged with the connector body and the locking nuts. For liquid sealing applications, such joints are liquid tight at 200 ℃, but tests above 200 ℃ are in the field of cables. For fluid lines, the sealing performance of the joint above 200 ℃ is not recorded in detail.
Disclosure of Invention
In view of the drawbacks of the prior art, an object of the present invention is to provide a self-compensating high-temperature and high-pressure joint, a connecting device and an operating method.
According to the present invention, there is provided a self-compensating high temperature and high pressure joint, comprising: high temperature high pressure joint 1, interface pressure cap 2, dish spring 3 and high temperature high pressure joint gland 4, wherein:
the disc spring 3 and the high-temperature high-pressure joint gland 4 are arranged in the interface pressure cap 2;
the high-temperature high-pressure joint 1 is inserted into the interface pressing cap 2 and penetrates through the disc spring 3 to be connected with the high-temperature high-pressure joint pressing cover 4 through threads.
Preferably, the disc spring 3 is provided in plurality, and the plurality of disc springs 3 are oppositely plugged in the interface pressing cap 2.
Preferably, the plurality of disc springs 3 are identical.
Preferably, the bottom of the interface pressing cap 2 is provided with a receiving cavity 7, and the receiving cavity 7 is communicated with the top of the interface pressing cap 2 through a through hole.
Preferably, the high-temperature and high-pressure joint 1 enters the accommodating cavity 7 through the through hole and is in threaded connection with the high-temperature and high-pressure joint gland 4 arranged in the accommodating cavity 7.
Preferably, the high-temperature high-pressure connector 1 and the interface pressing cap 2 are both provided with external threads, and the high-temperature high-pressure connector pressing cap 4 is provided with internal threads matched with the high-temperature high-pressure connector 1.
The invention also provides a self-compensating high-temperature and high-pressure joint connecting device, which comprises a joint body 5 and the self-compensating high-temperature and high-pressure joint, wherein:
the joint body 5 is in threaded connection with the self-compensation high-temperature high-pressure joint and abuts against one end of the high-temperature high-pressure joint 1.
Preferably, the bottom of the joint body 5 is provided with an air inlet conical surface 6, and one end of the high-temperature and high-pressure joint 1 abuts against the air inlet conical surface 6.
The invention also provides an operation method of the self-compensation high-temperature and high-pressure joint, which is characterized by comprising the following steps of:
step S1: inserting the high-temperature high-pressure joint 1 into the interface pressing cap 2;
step S2: the tops of the two disc springs 3 are attached and oppositely arranged, penetrate through the high-temperature high-pressure joint 1 and are placed in the interface pressing cap 2;
step S3: the high-temperature high-pressure joint gland 4 is connected with the high-temperature high-pressure joint 1 through threads and is placed in the joint gland 2, and the top of the high-temperature high-pressure joint gland 4 is attached to the bottom of one disc spring 3;
step S4: the self-compensating high-temperature high-pressure joint is connected with the joint body 5.
Preferably, the step S4 includes: and screwing the interface pressing cap 2 of the self-compensation high-temperature and high-pressure joint with the joint body 5 through threads, so that the high-temperature and high-pressure joint 1 of the self-compensation high-temperature and high-pressure joint is tightly attached to the air inlet conical surface 6 of the joint body 5.
Compared with the prior art, the invention has the following beneficial effects:
1. the self-compensation high-temperature and high-pressure joint and the joint body complete installation and connection work under normal temperature and normal pressure, the high-temperature and high-pressure joint and the joint body are screwed tightly, the disc spring arranged in the interface pressing cap can provide pre-tightening force for the high-temperature and high-pressure joint pressing cover, when the self-compensation high-temperature and high-pressure joint is in high temperature and high pressure, although threads can deform due to thermal expansion or high pressure, the high-temperature and high-pressure joint of the self-compensation high-temperature and high-pressure joint can still be tightly attached to the air inlet conical surface of the joint body to form a sealing effect due to the pre-tightening force of the disc spring.
2. The self-compensating high-temperature and high-pressure joint is easy to disassemble, and high-temperature and high-pressure joints, interface pressure caps, disc springs and high-temperature and high-pressure joint pressure covers of different sizes or different materials can be replaced at any time according to actual requirements.
3. The number of disc springs of the self-compensating high-temperature and high-pressure joint can be increased according to actual requirements.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is an exploded view of a self-compensating high temperature, high pressure joint;
FIG. 2 is a schematic perspective view of a self-compensating high-temperature high-pressure joint;
FIG. 3 is a cross-sectional view of a three-dimensional structure of a self-compensating high-temperature high-pressure joint;
fig. 4 is a cross-sectional view of the self-compensating high temperature and high pressure fitting as it is connected to the fitting body.
The figures show that:
high temperature high pressure joint 1
High-temperature high-pressure joint gland 4
Air inlet conical surface 6
Receiving cavity 7
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
As shown in fig. 1, the present invention provides a self-compensating high-temperature and high-pressure joint explosion diagram, which includes: the high-temperature high-pressure connector comprises a high-temperature high-pressure connector 1, a connector pressing cap 2, a disc spring 3 and a high-temperature high-pressure connector pressing cover 4.
As shown in fig. 2 and 3, the high-temperature and high-pressure connector 1 is inserted into the interface pressing cap 2, the tops of the two disc springs 3 are attached to each other and oppositely arranged in the interface pressing cap 2, the high-temperature and high-pressure connector pressing cover 4 is connected with the high-temperature and high-pressure connector 1 through threads and arranged in the interface pressing cap 2, and the top of the high-temperature and high-pressure connector pressing cover 4 is attached to the bottom of one disc spring 3.
Further, the components of the self-compensating high temperature and high pressure joint are: the high-temperature high-pressure connector, the interface pressing cap, the disc spring and the high-temperature high-pressure connector pressing cover are detachable; the high-temperature high-pressure joint, the interface pressing cap, the disc spring and the high-temperature high-pressure joint pressing cover can be changed in materials and sizes according to actual requirements. The two disc springs are consistent, under the working condition that larger pretightening force is needed, the number of the disc springs can be increased according to the actual requirement, but the minimum number is not less than two; when the number of the disc springs is increased, the disc springs can be placed in an opposite mode or in an overlapped mode.
As shown in fig. 4, the self-compensating high-temperature and high-pressure joint is connected with the joint body, the high-temperature and high-pressure joint 1 is tightly attached to the air inlet conical surface 6, and the joint pressure cap 2 is connected with the joint body 5 through threads.
Screwing the high-temperature high-pressure connector 1 and the high-temperature high-pressure connector gland 4 under normal temperature and normal pressure, simultaneously screwing the interface pressure cap 2 and the connector body 5, placing the disc spring 3 inside the interface pressure cap 2 to provide pretightening force for the high-temperature high-pressure connector gland 4, and when the self-compensation high-temperature high-pressure connector is in high temperature and high pressure, although the connecting thread can be deformed due to thermal expansion or high pressure, the high-temperature high-pressure connector 1 still can be tightly attached to the air inlet conical surface 6 to form a sealing effect due to the pretightening force of the disc spring 3.
The invention also provides an operation method of the self-compensation high-temperature and high-pressure joint, which comprises the following steps:
step S1, inserting the high-temperature high-pressure joint 1 into the interface pressure cap 2;
step S2, the tops of the two disc springs 3 are jointed and oppositely arranged, penetrate through the high-temperature high-pressure joint 1 and are placed in the joint pressure cap 2;
step S3, the high-temperature and high-pressure joint gland 4 is connected with the high-temperature and high-pressure joint 1 through threads and is placed into the joint gland 2, and the top of the high-temperature and high-pressure joint gland 4 is attached to the bottom of one disc spring 3;
step S4, connecting the self-compensating high-temperature and high-pressure joint to the joint body 5, specifically, screwing the interface pressure cap 2 of the self-compensating high-temperature and high-pressure joint to the joint body 5 through a screw thread, so that the high-temperature and high-pressure joint 1 of the self-compensating high-temperature and high-pressure joint is tightly attached to the air inlet conical surface 6 of the joint body 5, and can work in a high-temperature (650 ℃) and high-pressure environment (40 MPa).
Example 2
The high-temperature high-pressure joint 1, the interface pressing cap 2, the disc spring 3 and the high-temperature high-pressure joint pressing cover 4 of the self-compensation high-temperature high-pressure joint can be detached and replaced according to actual requirements, or processing materials and sizes can be changed according to actual requirements.
The dish springs 3 that self-compensating high temperature high pressure connects are unanimous, and the quantity can increase according to actual demand, and the form of putting also can be adjusted according to actual demand, but theoretically can not be less than 2, otherwise can not provide sufficient pretightning force.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A self-compensating high temperature and high pressure joint, comprising: high temperature high pressure connects (1), interface pressure cap (2), dish spring (3) and high temperature high pressure to connect gland (4), wherein:
the disc spring (3) and the high-temperature and high-pressure joint gland (4) are arranged in the interface pressure cap (2);
the high-temperature and high-pressure joint (1) is inserted into the interface pressing cap (2) and penetrates through the disc spring (3) to be connected with the high-temperature and high-pressure joint pressing cap (4) through threads.
2. Self-compensating high-temperature high-pressure joint according to claim 1, characterized in that the disc spring (3) is provided in plurality, and a plurality of disc springs (3) are oppositely plugged in the interface pressure cap (2).
3. Self-compensating high-temperature high-pressure joint according to claim 2, characterized in that the plurality of disc springs (3) are identical.
4. Self-compensating high-temperature high-pressure joint according to claim 1, characterized in that the bottom of the interface pressure cap (2) is provided with a receiving cavity (7), and the receiving cavity (7) is communicated with the top of the interface pressure cap (2) through a through hole.
5. Self-compensating high-temperature and high-pressure joint according to claim 4, characterized in that the high-temperature and high-pressure joint (1) enters the receiving cavity (7) through the through hole and is in threaded connection with a high-temperature and high-pressure joint gland (4) arranged in the receiving cavity (7).
6. Self-compensating high-temperature and high-pressure joint according to claim 1, characterized in that the high-temperature and high-pressure joint (1) and the joint pressure cap (2) are provided with external threads, and the high-temperature and high-pressure joint pressure cap (4) is provided with internal threads which are matched with the high-temperature and high-pressure joint (1).
7. A self-compensating high temperature and high pressure joint connection, comprising a joint body (5) and a self-compensating high temperature and high pressure joint according to any one of claims 1 to 6, wherein:
the joint body (5) is in threaded connection with the self-compensation high-temperature and high-pressure joint and abuts against one end of the high-temperature and high-pressure joint (1).
8. The self-compensating high-temperature high-pressure joint connection device according to claim 7, wherein the bottom of the joint body (5) is provided with an air inlet conical surface (6), and one end of the high-temperature high-pressure joint (1) abuts against the air inlet conical surface (6).
9. A method of operating a self-compensating high temperature and high pressure joint based on any one of claims 1 to 6, comprising the steps of:
step S1: inserting the high-temperature and high-pressure joint (1) into the interface pressing cap (2);
step S2: the tops of the two disc springs (3) are attached and oppositely arranged, penetrate through the high-temperature high-pressure joint (1) and are placed in the interface pressing cap (2);
step S3: the high-temperature and high-pressure joint gland (4) is connected with the high-temperature and high-pressure joint (1) through threads and is placed in the joint gland (2), and the top of the high-temperature and high-pressure joint gland (4) is attached to the bottom of one disc spring (3);
step S4: the self-compensating high-temperature and high-pressure joint is connected with the joint body (5).
10. The operating method according to claim 9, wherein the step S4 includes: and (2) the interface pressing cap (2) of the self-compensation high-temperature and high-pressure joint is screwed up and connected with the joint body (5) through threads, so that the high-temperature and high-pressure joint (1) of the self-compensation high-temperature and high-pressure joint is tightly attached to the air inlet conical surface (6) of the joint body (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110483111.2A CN113202990B (en) | 2021-04-30 | 2021-04-30 | Self-compensating high-temperature high-pressure joint, connecting device and operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110483111.2A CN113202990B (en) | 2021-04-30 | 2021-04-30 | Self-compensating high-temperature high-pressure joint, connecting device and operation method |
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| Publication Number | Publication Date |
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| CN113202990A true CN113202990A (en) | 2021-08-03 |
| CN113202990B CN113202990B (en) | 2022-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110483111.2A Active CN113202990B (en) | 2021-04-30 | 2021-04-30 | Self-compensating high-temperature high-pressure joint, connecting device and operation method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB697495A (en) * | 1951-04-30 | 1953-09-23 | James Clarence Hobbs | Improvements in or relating to pipe couplings, joints or similar devices |
| GB1105399A (en) * | 1965-11-22 | 1968-03-06 | Autoclave Eng Inc | High pressure fittings for tubing |
| CN106461138A (en) * | 2013-12-18 | 2017-02-22 | 稻场久二男 | High-pressure pipe fittings and high-endurance fittings |
| CN108006340A (en) * | 2017-11-30 | 2018-05-08 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of preparation method of the pipe seal part used under high temperature |
| CN108474334A (en) * | 2016-01-08 | 2018-08-31 | 瓦锡兰芬兰有限公司 | Pipe assembly and method for connecting pipe assemblies |
| WO2020205690A1 (en) * | 2019-04-01 | 2020-10-08 | Swagelok Company | Push to connect conduit fitting assemblies and arrangements |
-
2021
- 2021-04-30 CN CN202110483111.2A patent/CN113202990B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB697495A (en) * | 1951-04-30 | 1953-09-23 | James Clarence Hobbs | Improvements in or relating to pipe couplings, joints or similar devices |
| GB1105399A (en) * | 1965-11-22 | 1968-03-06 | Autoclave Eng Inc | High pressure fittings for tubing |
| CN106461138A (en) * | 2013-12-18 | 2017-02-22 | 稻场久二男 | High-pressure pipe fittings and high-endurance fittings |
| CN108474334A (en) * | 2016-01-08 | 2018-08-31 | 瓦锡兰芬兰有限公司 | Pipe assembly and method for connecting pipe assemblies |
| CN108006340A (en) * | 2017-11-30 | 2018-05-08 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of preparation method of the pipe seal part used under high temperature |
| WO2020205690A1 (en) * | 2019-04-01 | 2020-10-08 | Swagelok Company | Push to connect conduit fitting assemblies and arrangements |
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| Publication number | Publication date |
|---|---|
| CN113202990B (en) | 2022-07-15 |
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