CN117249314A - Bimetal composite pipe connecting structure - Google Patents
Bimetal composite pipe connecting structure Download PDFInfo
- Publication number
- CN117249314A CN117249314A CN202210648660.5A CN202210648660A CN117249314A CN 117249314 A CN117249314 A CN 117249314A CN 202210648660 A CN202210648660 A CN 202210648660A CN 117249314 A CN117249314 A CN 117249314A
- Authority
- CN
- China
- Prior art keywords
- pipe
- corrosion
- bimetal composite
- resistant
- limiting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 122
- 238000005260 corrosion Methods 0.000 claims abstract description 132
- 230000007797 corrosion Effects 0.000 claims abstract description 127
- 230000000670 limiting effect Effects 0.000 claims abstract description 73
- 238000007789 sealing Methods 0.000 claims abstract description 43
- 230000002093 peripheral effect Effects 0.000 claims abstract description 41
- 239000012790 adhesive layer Substances 0.000 claims description 15
- 239000002905 metal composite material Substances 0.000 claims 5
- 239000000463 material Substances 0.000 description 10
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 239000000956 alloy Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding 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
- F16L15/001—Screw-threaded joints; Forms of screw-threads for such joints with conical threads
- F16L15/003—Screw-threaded joints; Forms of screw-threads for such joints with conical threads with sealing rings
-
- 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
-
- 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
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/18—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
-
- 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
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/18—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
- F16L58/182—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings for screw-threaded joints
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
The application provides a bimetal composite pipe connecting structure, relates to the technical field of bimetal composite pipes, and is used for solving the technical problem that a connecting part is corroded when the bimetal composite pipes are connected; the corrosion-resistant connecting pipe comprises a first end and a second end which are oppositely arranged, the first bimetal composite pipe fitting is embedded into the first end, and the second bimetal composite pipe fitting is embedded into the second end; the limiting pipe section in the corrosion-resistant connecting pipe is positioned between the first end and the second end, the central axis of the limiting pipe section is the same as that of the corrosion-resistant connecting pipe, and the outer peripheral wall of the limiting pipe section is overlapped with the inner peripheral wall of the corrosion-resistant connecting pipe; the sealing piece is arranged in the preset gap; the sealing element is arranged at the connecting part so as to achieve the purpose of preventing the connecting part from being corroded.
Description
Technical Field
The application relates to the technical field of bimetal composite pipes, in particular to a bimetal composite pipe connecting structure.
Background
The bimetal composite pipe is a novel composite pipe obtained by forcefully embedding two metal pipes together, is widely applied to the field of energy exploration and development of petroleum, natural gas, coalbed methane and the like, and comprises an outer pipe and an inner pipe, wherein the outer pipe is sleeved on the inner pipe, the outer pipe comprises a carbon steel pipe, has the functions of bearing pressure and rigid support, and the inner pipe is made of corrosion-resistant alloy and has the functions of corrosion resistance and wear resistance.
In the related art, two sections of bimetal composite pipes are connected together through a connecting pipe, wherein the connecting pipe is provided with internal threads, and the end parts of the two sections of bimetal composite pipes are respectively provided with external threads matched with the internal threads.
However, the flowing medium flowing through the bimetal composite pipe may corrode the end face of the outer pipe which is disposed inside the connecting pipe, and may also corrode the threaded connection portion of the connecting pipe and the bimetal composite pipe.
Disclosure of Invention
In view of the above problems, embodiments of the present application provide a bimetal composite pipe connection structure, which is configured to prevent corrosion at a connection portion by providing a sealing member at the connection portion between a bimetal composite pipe and a corrosion-resistant connection pipe.
In order to achieve the above object, the embodiments of the present application provide the following technical solutions:
a first aspect of embodiments of the present application provides a bimetal composite pipe connection structure, which includes a corrosion resistant connection pipe, a first bimetal composite pipe, a second bimetal composite pipe, and a seal; the corrosion-resistant connecting pipe comprises a first end and a second end which are oppositely arranged, wherein the end part of the first bimetal composite pipe fitting is embedded into the first end, and the end part of the second bimetal composite pipe fitting is embedded into the second end; the corrosion-resistant connecting pipe further comprises a limiting pipe section arranged in the corrosion-resistant connecting pipe, the limiting pipe section is positioned between the first end and the second end, the central axis of the limiting pipe section is the same as the central axis of the corrosion-resistant connecting pipe, and the outer peripheral wall of the limiting pipe section is overlapped with the inner peripheral wall of the corrosion-resistant connecting pipe; the sealing piece is arranged in the preset gap.
In one possible implementation manner, the first bimetal composite pipe comprises a first outer pipe and a first corrosion-resistant inner pipe, the first outer pipe is sleeved on the first corrosion-resistant inner pipe, the first outer pipe comprises a first end face, the first end face is close to the limit pipe section, and an extension pipe section extending away from the first end face is arranged on the first end face; the inner peripheral wall of the extension pipe section is overlapped with the outer peripheral wall of the first corrosion-resistant inner pipe, and the outer diameter of the extension pipe section is smaller than the outer diameter of the first outer pipe; the anti-corrosion connecting pipe is characterized in that a first preset gap is formed between the extension pipe section and the limiting pipe section, a second preset gap is formed between the extension pipe section and the inner peripheral wall of the anti-corrosion connecting pipe, and sealing elements are arranged in the first preset gap and the second preset gap.
In one possible implementation, the seal includes a seal body and a limit seal vertically connected to the seal body; the seal body is arranged in the first preset gap, and the limiting seal is arranged in the second preset gap.
In one possible implementation, an adhesive layer is provided between the limit seal and the extension pipe section.
In one possible implementation, an adhesive layer is provided between the limiting seal and the inner peripheral wall of the corrosion-resistant connecting pipe, and between the seal body and the inner peripheral wall of the corrosion-resistant connecting pipe.
In one possible implementation, an adhesive layer is provided between the seal body and the extension pipe section.
In one possible implementation, the end of the first outer tube has a first external thread and the first end has a first internal thread that mates with the first external thread.
In one possible implementation, the first external thread comprises a tapered external thread.
In one possible implementation, the extension pipe section has an outer diameter less than the minor diameter of the first external thread.
In one possible implementation, the seal comprises a rubber ring.
According to the bimetal composite pipe connecting structure, the first bimetal composite pipe fitting and the second bimetal composite pipe fitting are connected through the corrosion-resistant connecting pipe, the corrosion-resistant connecting pipe comprises a first end and a second end which are oppositely arranged, the end part of the first bimetal composite pipe fitting is embedded into the first end, and the end part of the second bimetal composite pipe fitting is embedded into the second end; the corrosion-resistant connecting pipe further comprises a limiting pipe section arranged in the corrosion-resistant connecting pipe, the limiting pipe section is positioned between the first end and the second end, the central axis of the limiting pipe section is identical to the central axis of the corrosion-resistant connecting pipe, and the outer peripheral wall of the limiting pipe section is overlapped with the inner peripheral wall of the corrosion-resistant connecting pipe; the end part of the first bimetal composite pipe fitting and the limiting pipe section, and the end part of the second bimetal composite pipe fitting and the limiting pipe section are respectively provided with a preset gap, and a sealing element is arranged in the preset gap. The sealing piece can prevent the end surfaces of the first bimetal composite pipe fitting and the second bimetal composite pipe fitting from being contacted with the medium in the pipe so as to achieve the purpose of preventing the medium in the pipe from being corroded; meanwhile, the corrosion-resistant connecting pipe is made of a corrosion-resistant material, so that potential difference corrosion of the connecting parts of the first bimetal composite pipe fitting and the second bimetal composite pipe fitting and the corrosion-resistant connecting pipe can be avoided, and meanwhile, corrosion of medium in the pipe to the corrosion-resistant connecting pipe can also be avoided.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the examples or the prior art descriptions, it being obvious that the drawings in the following description are some examples of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of a bimetallic composite tube connection structure provided in an embodiment of the present application;
FIG. 2 is an enlarged view of portion A of FIG. 1;
fig. 3 is a schematic structural view of a seal provided in an embodiment of the present application.
Reference numerals illustrate:
100: a corrosion-resistant connecting pipe;
101: a first end; 102: a second end; 103: limiting pipe sections; 104: an inner peripheral wall of the corrosion-resistant connecting pipe;
1011: a first internal thread; 1031: the first limiting end face; 1032: the second limiting end face;
200: a first bimetallic composite tube;
201: a first outer tube; 202: a first corrosion-resistant inner tube;
2011: a first end face; 2012: extending the pipe section; 2013: a first external thread; 2021: the outer peripheral wall of the corrosion-resistant inner tube;
300: a second bimetallic composite tube;
301: a second outer tube; 302: a second corrosion-resistant inner tube;
400: a seal;
401: a seal body; 402: a limit seal;
4011: a central through hole.
Detailed Description
As described in the background art, in the related art, when two sections of bimetal composite pipes are connected by using a connecting pipe, the end face of the outer pipe arranged inside the connecting pipe and the threaded connection part of the connecting pipe and the bimetal composite pipe have problems of corrosion, and the technical researches find that the problems occur because the outer pipe and the inner pipe of the bimetal composite pipe are made of different metal materials, and potential difference corrosion exists between the outer pipe and the inner pipe, and the potential difference corrosion exists when the connecting pipe is connected with the bimetal composite pipe; meanwhile, the flowing medium flowing through the bimetal composite pipe can corrode the end surface of the outer pipe which is arranged inside the connecting pipe and the threaded connection part of the connecting pipe and the bimetal composite pipe.
Aiming at the technical problems, the corrosion-resistant method proposed by the related art is to build up welding of the same corrosion-resistant alloy material on the end face of the bimetal composite pipe and the surface of the connecting pipe, so that the connecting part of the bimetal composite pipe and the connecting pipe uses the corrosion-resistant alloy of the same material to achieve the purpose of preventing potential difference corrosion and medium corrosion; however, the anti-corrosion method not only increases the connection cost of the bimetal composite pipe, but also increases the manufacturing procedures during the connection of the bimetal composite pipe, and reduces the production efficiency.
Aiming at the technical problems, the embodiment of the application provides a bimetal composite pipe connecting structure, which is characterized in that a first bimetal composite pipe fitting and a second bimetal composite pipe fitting are connected through a corrosion-resistant connecting pipe, the end parts of the first bimetal composite pipe fitting and the second bimetal composite pipe fitting are respectively embedded into the two ends of the corrosion-resistant connecting pipe, a limiting pipe section is arranged in the corrosion-resistant connecting pipe, sealing pieces are arranged between the end part of the first bimetal composite pipe fitting and the limiting pipe section and between the end part of the second bimetal composite pipe fitting and the limiting pipe section, and the sealing pieces can prevent the outer pipes of the first bimetal composite pipe fitting and the second bimetal composite pipe fitting from being contacted with medium in the pipe so as to achieve the purpose of preventing the medium in the pipe from being corroded; meanwhile, the corrosion-resistant connecting pipe is made of corrosion-resistant materials, so that potential difference corrosion of the connecting parts of the first bimetal composite pipe fitting and the second bimetal composite pipe fitting and the corrosion-resistant connecting pipe is avoided, and meanwhile corrosion of medium in the pipe to the connecting pipe is avoided.
In order to make the above objects, features and advantages of the embodiments of the present application more comprehensible, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, based on the embodiments herein, which are within the scope of the protection of the present application, will be within the purview of one of ordinary skill in the art without the exercise of inventive faculty.
Referring to fig. 1, fig. 1 is a schematic cross-sectional view of a bimetal composite pipe connection structure; the bimetal composite pipe connecting structure comprises a corrosion-resistant connecting pipe 100, a first bimetal composite pipe 200 and a second bimetal composite pipe 300, wherein the corrosion-resistant connecting pipe 100 is positioned between the first bimetal composite pipe 200 and the second bimetal composite pipe 300, the corrosion-resistant connecting pipe 100 comprises a first end 101 and a second end 102, the first end 101 and the second end 102 are oppositely arranged on the central axis of the corrosion-resistant connecting pipe 100, the end part of the first bimetal composite pipe 200 is embedded into the first end 101, and the end part of the second bimetal composite pipe 300 is embedded into the second end 102, so that the first bimetal composite pipe 200 and the second bimetal composite pipe 300 are mutually communicated when being connected.
The corrosion-resistant connecting pipe 100 further comprises a limiting pipe section 103, the limiting pipe section 103 is arranged in the corrosion-resistant connecting pipe 100, the limiting pipe section 103 is positioned between the first end 101 and the second end 102, the central axis of the limiting pipe section 103 is identical to the central axis of the corrosion-resistant connecting pipe 100, and the outer peripheral wall of the limiting pipe section 103 is overlapped with the inner peripheral wall of the corrosion-resistant connecting pipe; that is, the corrosion-resistant connecting pipe 100 is sleeved on the limiting pipe section 103, and on the central axes of the corrosion-resistant connecting pipe 100 and the limiting pipe section 103, the length of the corrosion-resistant connecting pipe 100 is greater than that of the limiting pipe section 103, and both end surfaces of the limiting pipe section 103 are located in the corrosion-resistant connecting pipe 100.
The limiting pipe section 103 comprises a first limiting end surface 1031 and a second limiting end surface 1032 which are oppositely arranged, the end part of the first bimetal composite pipe fitting 200 is embedded into the first end 101 and is close to the first limiting end surface 1031, and the first limiting end surface 1031 can limit the end part of the first bimetal composite pipe fitting 200; meanwhile, the end of the second bimetal composite pipe 300 is embedded in the second end 102 and is close to the second limiting end face 1032, and the second limiting end face 1032 can limit the end of the second bimetal composite pipe 300.
On the basis of the above-mentioned spacing pipe section 103, the bimetal composite pipe connecting structure further comprises a sealing member 400, a preset gap is formed between the end of the first bimetal composite pipe 200 and the first spacing end surface 1031, the sealing member 400 is arranged in the preset gap, and the sealing member 400 is abutted against both the end of the first bimetal composite pipe 200 and the first spacing end surface 1031; a preset gap is also formed between the end of the second bimetal composite pipe 300 and the limiting pipe section 103, the sealing element 400 is arranged in the preset gap, and the sealing element 400 is abutted against both the end of the second bimetal composite pipe 300 and the limiting pipe section 103.
Therefore, in the bimetal composite pipe connecting structure provided by the embodiment of the application, the first bimetal composite pipe fitting 200 and the second bimetal composite pipe fitting 300 are connected through the corrosion-resistant connecting pipe 100, the corrosion-resistant connecting pipe 100 comprises a first end 101 and a second end 102 which are oppositely arranged, the end part of the first bimetal composite pipe fitting 200 is embedded into the first end 101, and the end part of the second bimetal composite pipe fitting 300 is embedded into the second end 102; the corrosion-resistant connecting pipe 100 further comprises a limiting pipe section 103 arranged in the corrosion-resistant connecting pipe 100, wherein the limiting pipe section 103 is positioned between the first end 101 and the second end 102, the central axis of the limiting pipe section 103 is the same as the central axis of the corrosion-resistant connecting pipe 100, and the outer peripheral wall of the limiting pipe section 103 is overlapped with the inner peripheral wall of the corrosion-resistant connecting pipe 100; the end of the first bimetal composite pipe fitting 200 and the limiting pipe section 103, and the end of the second bimetal composite pipe fitting 300 and the limiting pipe section 103 are respectively provided with a preset gap, and a sealing piece 400 is arranged in the preset gap. The sealing member 400 can prevent the end surfaces of the first bimetal composite pipe fitting 200 and the second bimetal composite pipe fitting 300 from contacting with the medium in the pipe, so as to achieve the purpose of preventing the medium in the pipe from being corroded; meanwhile, the corrosion-resistant connecting pipe 100 is made of a corrosion-resistant material, so that potential difference corrosion of the connecting parts of the first bimetal composite pipe fitting 200 and the second bimetal composite pipe fitting 300 and the corrosion-resistant connecting pipe 100 can be avoided, and meanwhile, corrosion of medium in the pipe to the corrosion-resistant connecting pipe 100 can also be avoided.
In this embodiment, the first bimetal composite pipe fitting 200 includes a first outer pipe 201 and a first corrosion-resistant inner pipe 202, the first outer pipe 201 is sleeved on the first corrosion-resistant inner pipe 202, the first outer pipe 201 may include a carbon steel pipe, and has functions of pressure bearing and rigid support; the first corrosion-resistant inner tube 202 is made of a corrosion-resistant alloy and has the functions of corrosion resistance and wear resistance.
The thickness of the first corrosion-resistant inner tube 202 is 0.5mm or more, and may be 1mm.
Referring to fig. 1 and 2, fig. 2 is an enlarged view of a portion a in fig. 1; wherein the first outer tube 201 includes a first end surface 2011, when the end of the first bimetal composite tube 200 is embedded into the first end 101, the first end surface 2011 is close to a first limiting end surface 1031 of the limiting tube section 103, an extension tube section 2012 extending away from the first end surface 2011 is disposed on the first end surface 2011, at this time, the first corrosion-resistant inner tube 202 also extends toward the first limiting end surface 1031, and on the central axis of the first bimetal composite tube 200, the length of the first corrosion-resistant inner tube 202 extends is the same as the length of the extension tube section 2012, the inner peripheral wall of the extension tube section 2012 coincides with the outer peripheral wall 2021 of the corrosion-resistant inner tube of the first corrosion-resistant inner tube 202, and the outer diameter of the extension tube section 2012 is smaller than the outer diameter of the first outer tube 201; that is, the extension pipe section 2012 is sleeved on the extended first corrosion-resistant inner pipe 202, and the outer peripheral wall of the extension pipe section 2012 is lower than the outer peripheral wall of the first outer pipe 201 in the radial direction (vertical direction shown in fig. 1 and 2) of the first bimetal composite pipe member 200.
A first preset gap is provided between the extension pipe segment 2012 and the first limit end surface 1031 of the limit pipe segment 103, and a second preset gap is provided between the extension pipe segment 2012 and the corrosion-resistant connecting pipe inner peripheral wall 104 of the corrosion-resistant connecting pipe 100. Wherein the extension pipe segment 2012 includes an outer peripheral wall and an end surface, the outer peripheral wall of the extension pipe segment 2012 is disposed opposite to the corrosion-resistant connecting pipe inner peripheral wall 104, such that a second preset gap is formed between the extension pipe segment 2012 and the corrosion-resistant connecting pipe inner peripheral wall 104; the end surface of the extension pipe segment 2012 is disposed opposite the first limit end surface 1031 of the limit pipe segment 103 such that a first predetermined gap is formed between the extension pipe segment 2012 and the first limit end surface 1031.
The first preset gap and the second preset gap are communicated with each other, and sealing elements 400 are arranged in the first preset gap and the second preset gap; at this time, the sealing member 400 is abutted against the first limiting end face 1031, the inner peripheral wall 104 of the corrosion-resistant connecting pipe, the first end face 2011 of the first outer tube 201, the end of the first corrosion-resistant inner tube 202, the end face of the extension tube section 2012, and the outer peripheral wall of the extension tube section 2012, so as to prevent the medium in the tube from contacting the first end face 2011 of the first outer tube 201, and the sealing member 400 abutted against the outer peripheral wall of the extension tube section 2012 has a limiting effect, so that the sealing member 400 is prevented from moving in the preset gap.
Wherein the length of the extension pipe segment 2012 in the axial direction of the first bimetallic composite pipe element 200 (horizontal direction shown in fig. 1 and 2) is 2.5-3.0mm, which may be 2.8mm; the length of the spacing tube section 103 is 3.0-3.5mm, which may be 3.4mm. In the radial direction (vertical direction shown in fig. 1 and 2) of the first bimetal composite pipe fitting 200, the outer diameter of the extension pipe section 2012 is smaller than the outer diameter of the first outer pipe 201, and the smaller value is greater than 4.5mm, and the outer diameter of the extension pipe section 2012 may be smaller than the outer diameter of the first outer pipe 201 by 4.8mm; the outer diameter of the stopper pipe segment 103 is 4.0-4.5mm greater than the outer diameter of the extension pipe segment 2012, and the outer diameter of the stopper pipe segment 103 may be 4.3mm greater than the outer diameter of the extension pipe segment 2012.
The second bimetal composite pipe fitting 300 is the same as the first bimetal composite pipe fitting 200, the second bimetal composite pipe fitting 300 comprises a second outer pipe 301 and a second corrosion-resistant inner pipe 302, and the second outer pipe 301 is sleeved on the second corrosion-resistant inner pipe 302; the connection structure between the second outer tube 301 and the second end 102 of the corrosion-resistant connection tube 100 is not described herein.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a seal, in the above embodiment of the present application, the seal 400 includes a seal body 401 and a limiting seal 402, the seal body 401 has a central through hole 4011, and a diameter of the central through hole 4011 is the same as an inner diameter of the first corrosion resistant inner tube 202; the limit seal 402 is vertically connected to the seal body 401 and disposed around the central through hole 4011; the seal body 401 is disposed in a first predetermined gap, the limit seal 402 is disposed in a second predetermined gap, and the limit seal 402 can prevent the seal 400 from moving within the predetermined gap.
It should be noted that, the sealing member 400 may include a rubber ring made of an oil-resistant material, and the thickness of the rubber ring may be 2.0-2.2mm, and may be 2.1mm.
In the above-described embodiments of the present application, an adhesive layer is provided between the limit seal 402 and the extension pipe segment 2012, wherein the adhesive layer is provided between the limit seal 402 and the outer peripheral wall of the extension pipe segment 2012, such that the seal 400 is firmly fixed in the preset gap.
The adhesive layer may be disposed between the limiting seal 402 and the first end surface 2011 of the first outer tube 201.
In the above embodiment of the present application, an adhesive layer is provided between the limiting seal 402 and the inner peripheral wall 104 of the corrosion-resistant connecting pipe, and an adhesive layer is also provided between the seal body 401 and the inner peripheral wall 104 of the corrosion-resistant connecting pipe, so that the installation of the seal 400 is further fixed.
In the above embodiment of the present application, an adhesive layer is provided between the seal body 401 and the extension pipe section 2012, wherein the adhesive layer is provided between the seal body 401 and the end face of the extension pipe section 2012, and further fixes the installation of the seal 400.
It should be noted that an adhesive layer may be disposed between the seal body 401 and the first limiting end surface 1031 of the limiting pipe segment 103.
The adhesive layer may be an adhesive.
In this embodiment, the end of the first outer tube 201 has a first external thread 2013, and the first end 101 has a first internal thread 1011 that mates with the first external thread 2013, that is, the first outer tube 201 is threaded into the first end 101 of the corrosion resistant connection tube 100. The second bimetal composite pipe 300 is identical to the first bimetal composite pipe 200, and will not be described again.
In the above embodiment of the present application, after the end portion of the first outer tube 201 is screwed with the first end 101, the sealing pressure between the sealing member 400 and the limiting tube section 103 is not less than 50MPa (sealing pressure under clean water medium), so that the contact pressure between the sealing member 400 and the limiting tube section 103 is formed, and the end portion of the first outer tube 201 is screwed with the first end 101 to have good sealing performance.
Wherein the clear water seal pressure between the seal 400 and the stopper tube section 103 may be 68MPa.
In the above embodiment of the present application, the first external thread 2013 includes a taper external thread, and when the end portion of the first outer tube 201 is screwed with the first end 101, the taper external thread is screwed more tightly, so that a better sealing effect is achieved.
In the above embodiments of the present application, the outer diameter of the extension pipe segment 2012 is smaller than the minor diameter of the first external thread 2013, i.e., the tooth bottom of the first external thread 2013.
The first external thread 2013 may be a API (AmericanPetroleum Institute) long round thread, and the API long round thread has the characteristics of compensating the diameter error of the connecting portion by axial displacement, and has high interchangeability, tight combination and easy assembly and disassembly.
The invention provides a bimetal composite pipe fitting threaded connection structure for preventing potential difference corrosion, which comprises a bimetal composite pipe body, a coupling, a U-shaped rubber sealing element and an adhesive. The end part of the pipe body is provided with an external thread, the front end of the external thread is provided with a nose shoulder, the nose shoulder is sleeved with a rubber sealing piece, and the rubber sealing piece is fixed at the end part of the pipe body under the action of an adhesive. The two ends of the coupling are provided with internal threads matched with the external threads of the pipe body, and the end parts of the internal threads are provided with extrusion shoulders. The rubber sealing piece sleeved on the nose shoulder can effectively avoid potential difference corrosion of the metal material at the inner layer and the outer layer of the bimetallic tube in a corrosion environment. Meanwhile, when the external thread of the pipe body is in threaded connection with the coupling, the U-shaped rubber sealing piece is arranged between the coupling material and the pipe body material, so that corrosion between the pipe body material and the coupling material due to potential difference is effectively prevented, and in addition, the rubber sealing piece is extruded by the extrusion shoulder of the pipe body end part and the coupling, so that threaded connection has a good sealing function.
In summary, the embodiment of the present application provides a bimetal composite pipe connecting structure, wherein a first bimetal composite pipe 200 and a second bimetal composite pipe 300 are connected by a corrosion-resistant connecting pipe 100, the corrosion-resistant connecting pipe 100 includes a first end 101 and a second end 102 which are oppositely arranged, the end of the first bimetal composite pipe 200 is embedded into the first end 101, and the end of the second bimetal composite pipe 300 is embedded into the second end 102; the corrosion-resistant connecting pipe 100 further comprises a limiting pipe section 103 arranged in the corrosion-resistant connecting pipe 100, wherein the limiting pipe section 103 is positioned between the first end 101 and the second end 102, the central axis of the limiting pipe section 103 is the same as the central axis of the corrosion-resistant connecting pipe 100, and the outer peripheral wall of the limiting pipe section 103 is overlapped with the inner peripheral wall of the corrosion-resistant connecting pipe 100; the end of the first bimetal composite pipe fitting 200 and the limiting pipe section 103, and the end of the second bimetal composite pipe fitting 300 and the limiting pipe section 103 are respectively provided with a preset gap, and a sealing piece 400 is arranged in the preset gap. The sealing member 400 can prevent the end surfaces of the first bimetal composite pipe fitting 200 and the second bimetal composite pipe fitting 300 from contacting with the medium in the pipe, so as to achieve the purpose of preventing the medium in the pipe from being corroded; meanwhile, the corrosion-resistant connecting pipe 100 is made of a corrosion-resistant material, so that potential difference corrosion of the connecting parts of the first bimetal composite pipe fitting 200 and the second bimetal composite pipe fitting 300 and the corrosion-resistant connecting pipe 100 can be avoided, and meanwhile, corrosion of medium in the pipe to the corrosion-resistant connecting pipe 100 can also be avoided.
In this specification, each embodiment or implementation is described in a progressive manner, and each embodiment focuses on a difference from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
Generally, terms should be understood at least in part by use in the context. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, at least in part depending on the context. Similarly, terms such as "a" or "an" may also be understood to convey a singular usage or a plural usage, depending at least in part on the context.
It should be readily understood that the terms "on … …", "above … …" and "above … …" in this disclosure should be interpreted in the broadest sense such that "on … …" means not only "directly on something", but also includes "on something" with intermediate features or layers therebetween, and "above … …" or "above … …" includes not only the meaning "on something" or "above" but also the meaning "above something" or "above" without intermediate features or layers therebetween (i.e., directly on something).
Further, spatially relative terms, such as "below," "beneath," "above," "over," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein interpreted accordingly.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. The bimetal composite pipe connecting structure is characterized by comprising a corrosion-resistant connecting pipe, a first bimetal composite pipe, a second bimetal composite pipe and a sealing piece;
the corrosion-resistant connecting pipe comprises a first end and a second end which are oppositely arranged, wherein the end part of the first bimetal composite pipe fitting is embedded into the first end, and the end part of the second bimetal composite pipe fitting is embedded into the second end;
the corrosion-resistant connecting pipe further comprises a limiting pipe section arranged in the corrosion-resistant connecting pipe, the limiting pipe section is positioned between the first end and the second end, the central axis of the limiting pipe section is the same as the central axis of the corrosion-resistant connecting pipe, and the outer peripheral wall of the limiting pipe section is overlapped with the inner peripheral wall of the corrosion-resistant connecting pipe;
the sealing piece is arranged in the preset gap.
2. The bi-metal composite pipe connection structure of claim 1, wherein the first bi-metal composite pipe comprises a first outer pipe and a first corrosion-resistant inner pipe, the first outer pipe is sleeved on the first corrosion-resistant inner pipe, the first outer pipe comprises a first end face, the first end face is close to the limit pipe section, and an extension pipe section extending away from the first end face is arranged on the first end face;
the inner peripheral wall of the extension pipe section is overlapped with the outer peripheral wall of the first corrosion-resistant inner pipe, and the outer diameter of the extension pipe section is smaller than the outer diameter of the first outer pipe;
the anti-corrosion connecting pipe is characterized in that a first preset gap is formed between the extension pipe section and the limiting pipe section, a second preset gap is formed between the extension pipe section and the inner peripheral wall of the anti-corrosion connecting pipe, and sealing elements are arranged in the first preset gap and the second preset gap.
3. The bimetal composite pipe connecting structure of claim 2 wherein the seal comprises a seal body and a limit seal, the limit seal being vertically connected to the seal body;
the seal body is arranged in the first preset gap, and the limiting seal is arranged in the second preset gap.
4. A bimetal composite pipe connecting structure as claimed in claim 3 wherein,
and an adhesive layer is arranged between the limiting sealing piece and the extension pipe section.
5. A bimetal composite pipe connecting structure as claimed in claim 3 wherein,
and adhesive layers are arranged between the limiting sealing piece and the inner peripheral wall of the corrosion-resistant connecting pipe and between the sealing piece body and the inner peripheral wall of the corrosion-resistant connecting pipe.
6. A bimetal composite pipe connecting structure as claimed in claim 3 wherein,
an adhesive layer is provided between the seal body and the extension tube section.
7. The bimetal composite pipe connecting structure of claim 2 wherein,
the end of the first outer tube has a first external thread and the first end has a first internal thread that mates with the first external thread.
8. The bi-metal composite pipe connection of claim 7, wherein the first external thread comprises a tapered external thread.
9. The bi-metal composite pipe connection of claim 7, wherein an outer diameter of the extension pipe section is smaller than a minor diameter of the first external thread.
10. The bi-metal composite pipe connection according to claim 1, wherein the sealing member comprises a rubber ring.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210648660.5A CN117249314A (en) | 2022-06-09 | 2022-06-09 | Bimetal composite pipe connecting structure |
| PCT/CN2022/137692 WO2023236474A1 (en) | 2022-06-09 | 2022-12-08 | Bimetal composite pipe connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210648660.5A CN117249314A (en) | 2022-06-09 | 2022-06-09 | Bimetal composite pipe connecting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117249314A true CN117249314A (en) | 2023-12-19 |
Family
ID=89117488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210648660.5A Pending CN117249314A (en) | 2022-06-09 | 2022-06-09 | Bimetal composite pipe connecting structure |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN117249314A (en) |
| WO (1) | WO2023236474A1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6375232B1 (en) * | 2000-04-27 | 2002-04-23 | The Boeing Company | Bi-metallic union fitting for use in threaded ports |
| US7429064B2 (en) * | 2005-05-04 | 2008-09-30 | Mm Plastic (Mfg.) Company, Inc. | Liquid tight fitting for conduit |
| DE102010028262A1 (en) * | 2010-04-27 | 2011-10-27 | Carl Zeiss Smt Gmbh | Device i.e. metallic pipe joint, for detachably and sealably connecting two components, has sealing element including non-adhesive coating with thickness of specified range on one of functional and/or sealing surfaces |
| CN201835756U (en) * | 2010-09-14 | 2011-05-18 | 衡阳华菱钢管有限公司 | Bimetal composited tube |
| CN206904387U (en) * | 2017-06-29 | 2018-01-19 | 浙江义腾特种钢管有限公司 | The corrosion-resistant multiple tube of pipeline engineering |
| CN211423671U (en) * | 2019-12-02 | 2020-09-04 | 中国石油天然气集团有限公司 | High-sealing corrosion-resistant RTP joint |
| CN112082014A (en) * | 2020-09-30 | 2020-12-15 | 西安德信成科技有限责任公司 | Corrosion-resistant connecting joint for oil-gas conveying non-metal pipeline and connecting method |
-
2022
- 2022-06-09 CN CN202210648660.5A patent/CN117249314A/en active Pending
- 2022-12-08 WO PCT/CN2022/137692 patent/WO2023236474A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023236474A1 (en) | 2023-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2008530470A (en) | Pipe threaded fittings with seals | |
| US4345785A (en) | Dielectric pipe coupling for use in high temperature, corrosive environments | |
| CN201100498Y (en) | Feeding flexing node | |
| CN101529145B (en) | Coupling assembly and protective ring therefor | |
| CN101915064B (en) | Bimetal compound pipe | |
| CN117249314A (en) | Bimetal composite pipe connecting structure | |
| CN207961909U (en) | A kind of enhanced stainless steel tube | |
| US5333913A (en) | Galvanic isolation device | |
| CN210318857U (en) | Bimetal corrosion-resistant oil casing and connecting device thereof | |
| CN205781550U (en) | A kind of anti-corrosion pipeline attachment structure | |
| CN202580332U (en) | Bimetal composite pipe fitting with instrument joint | |
| CN102506248A (en) | Coupling assembly and protective ring therefor | |
| CN115654235A (en) | Method and kit for steel pipeline insulation | |
| CN114087459A (en) | End-to-end connection method for pipelines with inner corrosion-resistant layers | |
| CN208487342U (en) | A kind of nonmetal pipeline end-fitting | |
| CN204459506U (en) | A kind of sun-proof reinforcing PE manages | |
| CN205078953U (en) | Pipeline connector | |
| CN104455431B (en) | A kind of alloy seal circle | |
| CN108591679A (en) | A kind of nonmetal pipeline end-fitting | |
| CN108930852A (en) | A kind of non-metal composite pipe connection component and operating method | |
| CN216110579U (en) | Composite oil pipe or casing pipe and coupling connecting structure | |
| CN211649393U (en) | Turbulence-proof pipeline | |
| CN206439510U (en) | A kind of composite bimetal pipe | |
| CN219734496U (en) | Titanium alloy composite pipe | |
| CN210462011U (en) | High pressure resistant three way connection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |