CN105909900A - Rapid connector and connecting method of rapid connector and nonmetallic composite pipe - Google Patents
Rapid connector and connecting method of rapid connector and nonmetallic composite pipe Download PDFInfo
- Publication number
- CN105909900A CN105909900A CN201610503808.0A CN201610503808A CN105909900A CN 105909900 A CN105909900 A CN 105909900A CN 201610503808 A CN201610503808 A CN 201610503808A CN 105909900 A CN105909900 A CN 105909900A
- Authority
- CN
- China
- Prior art keywords
- composite pipe
- inner bushing
- nonmetal
- pipe
- outer hoop
- 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 76
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 229910052755 nonmetal Inorganic materials 0.000 claims description 86
- 239000002905 metal composite material Substances 0.000 claims description 26
- 230000001050 lubricating effect Effects 0.000 claims description 11
- 239000004519 grease Substances 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000001680 brushing effect Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000012824 chemical production Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229920006334 epoxy coating Polymers 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002787 reinforcement Effects 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
- F16L37/00—Couplings of the quick-acting type
- F16L37/02—Couplings of the quick-acting type in which the connection is maintained only by friction of the parts being joined
-
- 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
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a rapid connector and a connecting method of the rapid connector and a nonmetallic composite pipe. The rapid connector comprises an inner bushing and two outer hoop sleeves, wherein the outer diameter of the inner bushing gradually becomes larger from the two ends to the middle part; the left and right ends of the inner bushing are inserted in the nonmetallic composite pipe; the inner bushing slightly stretches the inner diameter of the nonmetallic composite pipe in contact with the inner bushing; the outer loop sleeves are tubular; the inner diameters of the outer loop sleeves gradually become larger from one ends to the other ends; the outer loop sleeves sleeve the nonmetallic composite pipe in which the inner bushing is inserted, and tightly press the nonmetallic composite pipe and the inner bushing; and the ends, with larger inner diameters, of the outer loop sleeves are close to the middle part of the inner bushing. According to the rapid connector and the connecting method, the rapid connector can be directly and easily connected with a nonmetallic composite pipe body, and a good sealing effect can be achieved.
Description
Technical Field
The invention belongs to the technical field of oil and gas field, mine and chemical production, relates to a technical scheme of a quick connector for connecting a non-metal composite pipe, and particularly relates to a quick connector and a connecting method of the quick connector and the non-metal composite pipe.
Background
In oil and gas fields, mining and chemical production, in order to solve the problems of corrosion, abrasion and the like of a steel pipe caused by a medium, non-metal composite pipes are increasingly selected. The connection of the conventional nonmetal composite pipe adopts a flange head form, and the structure for connecting the flange head with the nonmetal composite pipe body is complex and has higher cost. The length that the producer can provide nonmetal compound pipe is limited, to some longer distance's pipeline, needs many sections nonmetal compound union couplings to form, and every section of such nonmetal compound pipe all needs the flange head, and pipeline construction is inconvenient.
Disclosure of Invention
The invention provides a quick joint for connecting non-metal composite pipes, which is convenient for the pipeline construction of the non-metal composite pipes, realizes the direct and simple connection of the pipe bodies of the non-metal composite pipes,
the technical solution of the invention is as follows:
a quick coupling for connecting non-metal composite pipes is characterized in that: comprises an inner lining
And an outer cuff;
the outer diameter of the inner bushing is gradually increased from two ends to the middle, the left end and the right end of the inner bushing are respectively used for inserting and pressing the nonmetal composite pipe, and the inner diameter of the nonmetal composite pipe in contact with the inner bushing is slightly increased by the inner bushing;
the outer hoop sleeves are tubular, the number of the outer hoop sleeves is two, and the inner diameter of each outer hoop sleeve is gradually increased from one end to the other end;
the outer hoop sleeve is used for being sleeved on the nonmetal composite pipe inserted with the inner bushing, the nonmetal composite pipe and the inner bushing are tightly pressed, and the end with the large inner diameter of the outer hoop sleeve is close to the middle of the inner bushing.
The inner bushing is divided into a first inserting section and a second inserting section in the length direction, a circular step is arranged on the outer wall of the first inserting section or the outer wall of the second inserting section, the circular step is coaxial with the central axis of the inner bushing, and the table surface of the step faces to the center of the inner bushing.
The circular steps are multiple and distributed on the first inserting section and the second inserting section.
The first inserting section and the second inserting section are provided with at least two circular steps.
The length of the inner bushing is 109.53mm-133.35mm, and the inner diameter of the inner bushing is 35.5mm-56.16 mm; the thickness of the pipe wall of the inner bushing is gradually reduced from the center to the two ends;
the length of the outer hoop sleeve is 73.02mm-88.9mm, and the minimum inner diameter of the outer hoop sleeve is 75.02mm-90.9 mm.
The length of the inner bushing is equal to 1.5 times of the outer diameter of the nonmetal composite pipe, and the inner diameter of the inner bushing is equal to the inner diameter of the nonmetal composite pipe minus 2/3 mm; the thickness of the pipe wall of the inner bushing is gradually reduced from the center to the two ends;
the length of the outer hoop sleeve is equal to the outer diameter of the nonmetal composite pipe, and the minimum inner diameter of the outer hoop sleeve is equal to the outer diameter of the nonmetal composite pipe plus 2 mm.
The method for connecting the quick connector with the non-metal composite pipe is characterized by comprising the following steps of:
1) inserting one end of the inner bushing from the pipe orifice of the nonmetal composite pipe to ensure that the contact section of the nonmetal composite pipe and the inner bushing is tapered;
2) under the condition of keeping the relative position of the inner bushing and the nonmetal composite pipe still, the outer hoop sleeve is axially pressed to move towards the orifice of the nonmetal composite pipe and stops moving after moving to the position meeting the design load;
3) and (3) repeating the steps 1) to 2) to finish the connection of the other end of the inner bushing, the other outer hoop and the other nonmetal composite pipe.
Wherein,
in the step 1), before one end of the inner bushing is inserted from a pipe orifice of the nonmetal composite pipe, respectively coating lubricating sealing grease on a part to be connected on the inner surface of the nonmetal composite pipe and a part to be connected on the outer surface of the inner bushing;
in the step 2), before the outer hoop sleeve is sleeved on the nonmetal composite pipe, the part to be connected on the outer surface of the nonmetal composite pipe and the inner surface of the outer hoop sleeve are respectively coated with lubricating and sealing grease.
Before the step 1), a step a) of cutting and leveling the orifice of the non-metal composite pipe to be connected to ensure that the plane of the orifice of the non-metal composite pipe is vertical to the central axis of the non-metal composite pipe.
And 4) coating anticorrosive paint on the exposed part of the inner bushing and the outer hoop.
The invention has the advantages of
The connecting device mainly comprises an inner bushing and an outer hoop sleeve, realizes direct and simple connection of the nonmetal composite pipe bodies, and can realize a good sealing effect;
when the joint is connected, the lubricating sealing grease coated on the contact surface passes through, and the inner bushing and the outer hoop sleeve are pressurized to complete sealing when matched; meanwhile, the pressure generated when the inner bushing and the outer hoop are matched with each other and the deformation friction of the nonmetal composite pipe can ensure a certain axial load resistance of the joint;
the invention can only reserve the two ends of the pipeline to be connected with other equipment parts in the form of flange heads, and the middle non-metal composite pipes are connected by adopting quick joints, thereby having simple structural form, reducing the connection cost and also providing the working efficiency.
Drawings
FIG. 1 is a schematic view of the connection state of the inner and outer ferrules and the non-metallic composite pipe;
FIG. 2 is a partially enlarged view of the connection between the inner and outer ferrules and the non-metallic composite pipe;
FIG. 3 is a schematic structural view of the inner liner, the outer ferrule and the non-metallic composite tube after the installation is completed;
description of reference numerals:
1-inner lining, 2-nonmetal composite pipe, 3-outer hoop sleeve and 4-round step.
Detailed Description
The invention designs a technical scheme of a quick joint for connecting non-metal composite pipes, and the quick joint mainly comprises an inner bushing 1 and an outer hoop 3. When the joint is connected, the lubricating sealing grease coated on the contact surface passes through, and the inner bushing and the outer hoop sleeve are pressurized to complete sealing when matched; meanwhile, the pressure generated when the inner bushing and the outer hoop are matched with each other and the deformation friction of the nonmetal composite pipe can ensure the certain axial load resistance of the joint.
(1) Inner lining
The inner liner can be made of a material which is resistant to media damage (corrosion/abrasion) and has considerable strength.
Length 1.5 times of external diameter of non-metal composite pipe
Inner diameter of the nonmetal composite pipe is-2/3 mm
The thickness is calculated according to the pressure bearing capacity of the pipeline
The tube heads at the two ends of the inner bushing are designed into shapes convenient to be inserted into the nonmetal composite tube, according to the outer diameter of the connected nonmetal composite tube, the outer surface of the inner bushing is designed into a circular step 4 with at least 2 rings at each end, or the outer surface of the inner bushing is designed into a variable wall thickness shape with at least 2 rings of outer ridges at each end (the wall thickness at the two ends is small, and the wall thickness in the middle is large in the overall view): the ridge is designed into a shape that the inner bushing is easy to insert and pull out, and simultaneously, the back edge of the ridge forms high contact pressure to realize sealing when being matched with the outer hoop.
(2) Outer hoop cover
The outer hoop is a section of steel pipe with variable inner diameter (wall thickness). The length (width) of the steel pipe is 1.0 time of the outer diameter of the nonmetal composite pipe; the minimum inner diameter is +2mm of the outer diameter of the non-metal composite pipe, so that the outer hoop can smoothly penetrate through the non-metal composite pipe, and the inner diameter of the rest part is designed and determined according to the size (outer diameter) of the inner bushing and the wall thickness of the non-metal composite pipe; the outer diameter of the outer hoop sleeve is determined by the minimum thickness of the outer hoop sleeve, so that the outer hoop sleeve is matched with the inner sleeve to generate contact pressure at the non-metal composite pipe to form sealing, and meanwhile, the friction force generated by the contact pressure ensures that the joint bears the axial load capacity.
(3) Connecting-quick joint application of non-metal composite pipe
A, cutting and leveling the pipe orifice of a nonmetal composite pipe to be connected, and ensuring good verticality between the plane of the pipe orifice and the axis of the pipe; meanwhile, the reinforcing layer in the composite pipe is protected by adopting proper measures, for example, for the non-metal composite pipe reinforced by the steel wire rope, after the pipe orifices are cut to be even, the steel wire rope part can be sealed by adopting epoxy coating to prevent the corrosion damage of the part;
b, sleeving the thin-wall end of the outer hoop on the nonmetal composite pipe towards the orifice of the nonmetal composite pipe;
c, performing proper (brushing/grinding) treatment on the inner surface of the nonmetal composite pipe to be connected, and performing proper (brushing/grinding) treatment on the outer surface of the inner bushing;
d, respectively coating proper lubricating sealing grease on the to-be-connected part of the inner surface of the pipe end of the nonmetal composite pipe and the to-be-connected part of the outer surface of the inner bushing;
e, molding the nonmetal composite pipe, and strongly inserting the treated end of the inner bushing into one end of the treated nonmetal composite pipe by using a proper tool to form a certain taper at the pipe end of the nonmetal composite pipe, wherein the lubricating and sealing grease has the functions of: the lubricating function is realized in the insertion and pressing process, and the reinforcing and sealing function can be realized after the insertion and pressing process is finished;
f, carrying out proper (brushing/grinding) treatment on the outer surface of the nonmetal composite pipe, and carrying out proper (brushing/grinding) treatment on the inner surface of the outer hoop sleeve;
respectively coating proper lubricating sealing grease on the to-be-connected part of the outer surface of the end of the nonmetal composite pipe and the to-be-connected part of the inner surface of the outer ferrule;
h, under the condition that the relative position of the inner bushing and the nonmetal composite pipe is kept still, the outer hoop sleeve is axially pressed to the end of the nonmetal composite pipe to move by using a proper tool and stops after a design load is reached, and the lubricating and sealing grease has the functions of: the sleeve pressing process plays a role in lubrication, and the sleeve pressing process can play a role in reinforcement and sealing after the sleeve pressing process is finished;
i, completing connection with the other end according to a-h;
j, adopting proper corrosion protection measures for the exposed part of the inner lining and the outer hoop sleeve to complete the connection of the nonmetal composite pipe.
Claims (10)
1. The utility model provides a connect quick-operation joint of non-metal composite pipe which characterized in that: comprises an inner bushing and an outer hoop;
the outer diameter of the inner bushing is gradually increased from two ends to the middle, the left end and the right end of the inner bushing are respectively used for inserting and pressing the nonmetal composite pipe, and the inner diameter of the nonmetal composite pipe in contact with the inner bushing is slightly increased by the inner bushing;
the outer hoop sleeves are tubular, the number of the outer hoop sleeves is two, and the inner diameter of each outer hoop sleeve is gradually increased from one end to the other end;
the outer hoop sleeve is used for being sleeved on the nonmetal composite pipe inserted with the inner bushing, the nonmetal composite pipe and the inner bushing are tightly pressed, and the end with the large inner diameter of the outer hoop sleeve is close to the middle of the inner bushing.
2. The quick connector for connecting non-metallic composite pipes according to claim 1, wherein: the inner bushing is divided into a first inserting section and a second inserting section in the length direction, a circular step is arranged on the outer wall of the first inserting section or the outer wall of the second inserting section, the circular step is coaxial with the central axis of the inner bushing, and the table surface of the step faces to the center of the inner bushing.
3. The quick connector for connecting non-metallic composite pipes according to claim 2, wherein: the circular steps are multiple and distributed on the first inserting section and the second inserting section.
4. The quick connector for connecting non-metallic composite pipes according to claim 3, wherein: the first inserting section and the second inserting section are provided with at least two circular steps.
5. The quick connector for connecting non-metallic composite pipes according to claim 1 or 2 or 3 or 4, wherein:
the length of the inner bushing is 109.53mm-133.35mm, and the inner diameter of the inner bushing is 35.5mm-56.16 mm; the thickness of the pipe wall of the inner bushing is gradually reduced from the center to the two ends;
the length of the outer hoop sleeve is 73.02mm-88.9mm, and the minimum inner diameter of the outer hoop sleeve is 75.02mm-90.9 mm.
6. The quick connector for connecting non-metallic composite pipes according to claim 1 or 2 or 3 or 4, wherein:
the length of the inner bushing is equal to 1.5 times of the outer diameter of the nonmetal composite pipe, and the inner diameter of the inner bushing is equal to the inner diameter of the nonmetal composite pipe minus 2/3 mm; the thickness of the pipe wall of the inner bushing is gradually reduced from the center to the two ends;
the length of the outer hoop sleeve is equal to the outer diameter of the nonmetal composite pipe, and the minimum inner diameter of the outer hoop sleeve is equal to the outer diameter of the nonmetal composite pipe plus 2 mm.
7. Method for connecting a quick coupling according to any one of claims 1 to 6 to a non-metallic composite pipe, characterized in that it comprises the following steps:
1) inserting one end of the inner bushing from the pipe orifice of the nonmetal composite pipe to ensure that the contact section of the nonmetal composite pipe and the inner bushing is tapered;
2) under the condition of keeping the relative position of the inner bushing and the nonmetal composite pipe still, the outer hoop sleeve is axially pressed to move towards the orifice of the nonmetal composite pipe and stops moving after moving to the position meeting the design load;
3) and (3) repeating the steps 1) to 2) to finish the connection of the other end of the inner bushing, the other outer hoop and the other nonmetal composite pipe.
8. The method of connecting a quick connector to a non-metallic composite pipe of claim 7,
in the step 1), before one end of the inner bushing is inserted from a pipe orifice of the nonmetal composite pipe, respectively coating lubricating sealing grease on a part to be connected on the inner surface of the nonmetal composite pipe and a part to be connected on the outer surface of the inner bushing;
in the step 2), before the outer hoop sleeve is sleeved on the nonmetal composite pipe, the part to be connected on the outer surface of the nonmetal composite pipe and the inner surface of the outer hoop sleeve are respectively coated with lubricating and sealing grease.
9. The method for connecting a quick connector to a non-metal composite pipe according to claim 7 or 8, wherein the step 1) is preceded by a) cutting the orifice of the non-metal composite pipe to be connected to be flush so that the plane of the orifice of the non-metal composite pipe is perpendicular to the central axis of the non-metal composite pipe.
10. The method of connecting a quick connector to a non-metallic composite pipe of claim 9, further comprising step 4) applying an anti-corrosive paint to the exposed portion of the inner liner and the outer ferrule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610503808.0A CN105909900A (en) | 2016-06-29 | 2016-06-29 | Rapid connector and connecting method of rapid connector and nonmetallic composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610503808.0A CN105909900A (en) | 2016-06-29 | 2016-06-29 | Rapid connector and connecting method of rapid connector and nonmetallic composite pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105909900A true CN105909900A (en) | 2016-08-31 |
Family
ID=56754295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610503808.0A Pending CN105909900A (en) | 2016-06-29 | 2016-06-29 | Rapid connector and connecting method of rapid connector and nonmetallic composite pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105909900A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5470113A (en) * | 1993-05-13 | 1995-11-28 | Vulkan Lokring Gmbh | Connector for plastic tubes |
| CN2516801Y (en) * | 2001-11-13 | 2002-10-16 | 李志雄 | Metal plastic composite pipe fitting |
| CN2596166Y (en) * | 2001-12-05 | 2003-12-31 | 李志雄 | Metal-plastic composite pipe |
| CN102322554A (en) * | 2011-08-25 | 2012-01-18 | 张家港联冠新材料有限公司 | Medium-pressure steel wire reinforced plastic pipeline and pipe fitting connecting method |
| CN103162027A (en) * | 2013-03-31 | 2013-06-19 | 徐志超 | Pipeline sealing connector |
| CN205877526U (en) * | 2016-06-29 | 2017-01-11 | 中国石油天然气集团公司管材研究所 | Quick -operation joint who connects non - metal composite pipe |
-
2016
- 2016-06-29 CN CN201610503808.0A patent/CN105909900A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5470113A (en) * | 1993-05-13 | 1995-11-28 | Vulkan Lokring Gmbh | Connector for plastic tubes |
| CN2516801Y (en) * | 2001-11-13 | 2002-10-16 | 李志雄 | Metal plastic composite pipe fitting |
| CN2596166Y (en) * | 2001-12-05 | 2003-12-31 | 李志雄 | Metal-plastic composite pipe |
| CN102322554A (en) * | 2011-08-25 | 2012-01-18 | 张家港联冠新材料有限公司 | Medium-pressure steel wire reinforced plastic pipeline and pipe fitting connecting method |
| CN103162027A (en) * | 2013-03-31 | 2013-06-19 | 徐志超 | Pipeline sealing connector |
| CN205877526U (en) * | 2016-06-29 | 2017-01-11 | 中国石油天然气集团公司管材研究所 | Quick -operation joint who connects non - metal composite pipe |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160831 |
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| WD01 | Invention patent application deemed withdrawn after publication |