CN116608337A - Novel high-pressure sealing structure and sealing method - Google Patents
Novel high-pressure sealing structure and sealing method Download PDFInfo
- Publication number
- CN116608337A CN116608337A CN202310667838.5A CN202310667838A CN116608337A CN 116608337 A CN116608337 A CN 116608337A CN 202310667838 A CN202310667838 A CN 202310667838A CN 116608337 A CN116608337 A CN 116608337A
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- China
- Prior art keywords
- sealing
- thread
- head
- sealing ring
- shaped sealing
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- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 3
- 239000000945 filler Substances 0.000 description 7
- 238000012856 packing Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/04—Screw-threaded joints; Forms of screw-threads for such joints with additional sealings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a novel high-pressure sealing structure, which belongs to the technical field of pipe fitting processing and comprises a non-sealing thread outer spinneret (1) and a non-sealing thread inner spinneret (2) matched with the non-sealing thread outer spinneret (1), wherein a groove (3) is formed in the non-sealing thread outer spinneret (1), an O-shaped sealing ring (4) is arranged in the groove (3), and the outer diameter of the groove (3) is larger than the inner diameter of the O-shaped sealing ring (4); by adopting the high-pressure sealing connection structure and the method, the operation efficiency is improved by 500 percent; the comprehensive cost is reduced by 70%; the pressure endurance is improved to 30MPa.
Description
Technical Field
The invention relates to the technical field of pipe fitting processing, in particular to a novel high-pressure sealing structure and a sealing method.
Background
In order to achieve connection and sealing of pipes, the prior art generally processes threads into an inner pipe sealing thread 5 and an outer pipe sealing thread 6 (fig. 1), winds or smears fillers on the contact surfaces of the threads, and the threads are screwed in and out to achieve connection and sealing of the pipes (fig. 2).
There are at least several problems with this approach: (1) The thread must be a sealing pipe thread, and other non-sealing pipe threads cannot realize the sealing effect, however, the process requirement of the sealing pipe thread is higher, and the cost is increased intangibly; (2) The thread and the packing of the sealing pipe can only be used for medium-low pressure pipes (the pressure is less than or equal to 10 MPa), the sealing capability is limited, and the sealing of high-pressure pipes (the bearing pressure of the high-pressure pipes is more than 10MPa and up to 100 MPa) cannot be realized; (3) When the filler is wound or smeared, the filler is easy to remain in the pipeline, and the use situation is limited, so that the working condition requirement can not be well met; (4) The operation is complicated, and fillers are wound or smeared before connection, so that the workload is increased; the packing operation is relatively important, the packing winding or smearing operation is incorrect, and the probability of poor sealing exists; (5) Because the filler is difficult to disassemble, only strong disassembly or auxiliary disassembly by heating through baking can be used, the influence on other parts is large, and unpredictable damage is caused.
Disclosure of Invention
One of the objectives of the present invention is to provide a novel high-pressure sealing structure to solve the above-mentioned problems.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the utility model provides a novel high-pressure seal structure, includes the outer silk head of non-seal screw thread and with the outer silk head complex non-seal screw thread internal thread silk head of non-seal screw thread is provided with the recess on the outer silk head of non-seal screw thread, be provided with O shape sealing washer in the recess, the external diameter of recess is greater than the internal diameter of O shape sealing washer, the sealing washer external diameter of the outer silk head of non-seal screw thread is greater than the internal diameter of the inner silk head of non-seal screw thread, the external diameter of O sealing washer is greater than the internal diameter of the inner silk head of non-seal screw thread.
The invention relates to a non-sealing thread external thread head and a non-sealing thread internal thread head, namely common external threads and internal threads such as metric system.
As a preferable technical scheme: and the end part of the non-sealing thread outer thread head is chamfered or inverted circular arc. The arrangement can play a guiding role when the sealing thread outer thread head is screwed in, so that the protection and the pressing-in of the O-shaped sealing ring are facilitated; by screwing the outer wire head and the inner wire head, the O-shaped sealing ring is radially compressed, and meanwhile, the outer wire head provides an axial friction thrust force for the O-shaped sealing ring, so that the O-shaped sealing ring is finally in close contact with the step end surface of the inner wire head.
As a preferable technical scheme: the contact surface of the non-sealing thread outer thread head and the O-shaped sealing ring is smooth; the contact surface of the non-sealing thread inner thread head and the O-shaped sealing ring is smooth. The smoother the contact surface, the higher the sealing capability.
The second object of the present invention is to provide a method for sealing by using the high-pressure sealing structure, which adopts the following technical scheme:
(1) The O-shaped sealing ring is arranged in a groove of the non-sealing thread outer thread head, and the outer diameter of the groove is slightly larger than the inner diameter of the O-shaped sealing ring, so that the O-shaped sealing ring is in an expanded state after being arranged;
(2) Connecting the unsealed threaded outer thread head and the unsealed threaded inner thread head which are provided with the O-shaped sealing rings in the step (1);
(3) And (3) completing connection, and introducing a gas or liquid medium (such as water) from the pipeline inlet to the hollow communication part in the middle of the thread, wherein the medium permeates into the O-shaped sealing ring through the thread surface to realize high-pressure sealing.
Compared with the prior art, the invention has the advantages that: compared with the prior art, the novel high-pressure sealing connection structure and method have the advantages that the operation convenience is improved, and the operation efficiency is improved by 500%; the labor cost and the packing cost of processing are saved, and the comprehensive cost is reduced by 70%; the risk of residual filler in the pipeline is eliminated, and the pipeline is screwed, assembled and disassembled according to common threads without any filler, so that the problems of troublesome disassembly and adverse effect on other parts in the prior art are solved; and the pressure resistance is improved to 30MPa.
Drawings
FIG. 1 is a schematic illustration of a prior art seal tube prior to sealing connection;
FIG. 2 is a schematic illustration of a prior art tube seal connection;
FIG. 3 is a perspective view of an unsealed threaded outer nipple and an O-ring seal according to an embodiment of the invention
FIG. 4 is a block diagram of the O-ring seal of FIG. 3 installed in a non-sealing threaded outer spinneret;
FIG. 5 is a block diagram of an embodiment of the present invention prior to connection;
FIG. 6 is a block diagram of an embodiment of the present invention after connection;
fig. 7 is a perspective view of an embodiment of the present invention after connection.
In the figure: 1. a non-sealing threaded outer spinneret; 2. a non-sealing threaded inner wire head; 3. a groove; 4. an O-ring seal; 5. an inner tube sealing thread; 6. the outer tube seals the threads.
Description of the embodiments
The invention will be further described with reference to the accompanying drawings.
Examples
Referring to fig. 3 and 4, a novel high-pressure sealing structure comprises a non-sealing thread outer spinneret 1 and a non-sealing thread inner spinneret 2 matched with the non-sealing thread outer spinneret 1, wherein a groove 3 is formed in the non-sealing thread outer spinneret 1, an O-shaped sealing ring 4 is arranged in the groove 3, the outer diameter of the groove 3 is larger than the inner diameter of the O-shaped sealing ring 4, and the outer diameter D of the O-shaped sealing ring 4 is larger than the inner diameter D (fig. 5) of the non-sealing thread inner spinneret 2;
in this embodiment: the end part of the non-sealing thread outer thread head 1 is chamfered or inverted circular arc;
in this embodiment: the contact surface of the non-sealing thread outer thread head 1 and the O-shaped sealing ring 4 is smooth; the contact surface of the non-sealing thread inner thread head 2 and the O-shaped sealing ring 4 is also smooth;
the method for high-pressure sealing by adopting the sealing structure comprises the following steps:
(1) The O-shaped sealing ring 4 is arranged in the groove 3 of the unsealed threaded outer thread head 1, and the O-shaped sealing ring 4 is in an expanded state after being arranged because the outer diameter of the groove 3 is slightly larger than the inner diameter of the O-shaped sealing ring 4;
(2) Connecting the unsealed thread outer thread head 1 provided with the O-shaped sealing ring 4 in the step 1 with the unsealed thread inner thread head 2;
(3) The connection is completed, gas or liquid medium (such as water) is introduced into the hollow communication part in the middle of the thread from the pipeline inlet, the medium permeates into the O-shaped sealing ring 4,O through the thread surface, the O-shaped sealing ring 4 is already sealed towards the direction of the unsealed thread outer thread head 1, and the O-shaped sealing ring 4 is pushed more tightly under the action of pushing force, so that high-pressure sealing is realized, as shown in fig. 6 and 7;
by adopting the structure and the method, the pressure resistance of the sealing connection of the pipe fitting is improved to 30MPa;
the pressure resistance test method is a hydraulic test and comprises the following specific steps:
one end of a pipeline connected with the sealing structure of the embodiment is plugged, and a wire matched with the hydraulic pressure testing machine is welded on one end of the pipeline; the test pipeline is filled with water and is connected with a hydraulic pressure tester through a wire; the leakage condition of the sealing connection mode of the embodiment is observed by pressurizing the hydraulic pressure testing machine and combining the pressure value, and no leakage occurs up to 30MPa.
In addition, by adopting the sealing connection of the embodiment, the pipeline is generally 30-60s according to the size, and by adopting the scheme of the prior art, 5-10min is generally required, so that the efficiency is improved by at least 5 times;
from a cost perspective: by adopting the scheme of the embodiment, the labor time cost is reduced, the filling cost is reduced, and the comprehensive cost is reduced to about 30% of the prior art.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (4)
1. The utility model provides a novel high pressure seal structure which characterized in that: including non-sealed screw thread outer silk head (1) and with non-sealed screw thread inner silk head (2) of non-sealed screw thread outer silk head (1) be provided with recess (3) on the non-sealed screw thread outer silk head (1), be provided with O shape sealing washer (4) in recess (3), the external diameter of recess (3) is greater than the internal diameter of O shape sealing washer (4), the external diameter of O sealing washer (4) is greater than the internal diameter of non-sealed screw thread inner silk head (2).
2. The novel high pressure seal structure of claim 1, wherein: and the end part of the non-sealing threaded outer thread head (1) is chamfered or inverted circular arc.
3. The novel high pressure seal structure of claim 1, wherein: the contact surface of the non-sealing thread external thread head (1) and the O-shaped sealing ring (4) is smooth; the contact surface of the non-sealing thread inner thread head (2) and the O-shaped sealing ring (4) is smooth.
4. A method of sealing with a high pressure sealing structure according to any one of claims 1 to 3, comprising the steps of:
(1) The O-shaped sealing ring (4) is arranged in a groove (3) of the unsealed thread outer thread head (1), and the O-shaped sealing ring (4) is in an expanded state after being arranged;
(2) Connecting the unsealed threaded outer thread head (1) provided with the O-shaped sealing ring (4) in the step (1) with the unsealed threaded inner thread head (2);
(3) And (3) completing connection, introducing a medium in the middle, and penetrating the medium to an O-shaped sealing ring (4) through a thread surface to complete high-pressure sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310667838.5A CN116608337A (en) | 2023-06-07 | 2023-06-07 | Novel high-pressure sealing structure and sealing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310667838.5A CN116608337A (en) | 2023-06-07 | 2023-06-07 | Novel high-pressure sealing structure and sealing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116608337A true CN116608337A (en) | 2023-08-18 |
Family
ID=87679965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310667838.5A Pending CN116608337A (en) | 2023-06-07 | 2023-06-07 | Novel high-pressure sealing structure and sealing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116608337A (en) |
-
2023
- 2023-06-07 CN CN202310667838.5A patent/CN116608337A/en active Pending
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