CN211203244U - Composite metal joint - Google Patents
Composite metal joint Download PDFInfo
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- CN211203244U CN211203244U CN201922165372.0U CN201922165372U CN211203244U CN 211203244 U CN211203244 U CN 211203244U CN 201922165372 U CN201922165372 U CN 201922165372U CN 211203244 U CN211203244 U CN 211203244U
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Abstract
The utility model relates to a composite metal joint, which comprises a screw head core tube assembly and a flat head core tube assembly, wherein the ends of the screw head core tube assembly and the flat head core tube assembly are fixedly connected through nuts; the stainless steel layer is arranged outside the screw head core tube assembly and the flat head core tube assembly, the carbon steel layer is arranged outside the stainless steel layer of the screw head core tube assembly/the flat head core tube assembly outside the sleeve, the structure is simple, the damage to the anticorrosive coating can be effectively prevented in the buckling process, the service efficiency of the metal joint is improved, the use cost is reduced, the defects of the original buckling process are overcome, the reliability of the application of the composite metal joint is improved, and the flow resistance of the metal joint is reduced.
Description
Technical Field
The utility model relates to a flexible high pressure feed pipe butt joint technical field, concretely relates to composite metal connects and withholds method.
Background
The flexible composite high-pressure delivery pipe is mainly used for land oil and gas delivery pipelines, is corrosion-resistant, simple in operation and the like, reduces the delivery cost, improves the production efficiency, and lays a foundation for the popularization of non-metal pipelines in the field. The method can be said to be a new development branch of future oil field pipelines and has wide application prospect.
However, it is known that problems and deficiencies are also found in the application process, mainly manifested as pipe bursts and leaks. Causes of pipe failure include pipe quality problems, joint problems, job specification problems, etc., with the problems due to joint technology being a significant share. Therefore, there is a need for improvements and optimizations to the joint related art.
The existing pipeline joint does not have corrosion resistance, and the surface of the inner pipe and the outer pipe is subjected to corrosion prevention treatment for improving the corrosion resistance, such as plastic spraying, epoxy coating, chemical plating and the like. However, when the new buckling mode is adopted, the anticorrosion layer is damaged, especially the inner inserting pipe contacted with the conveyed fluid loses the anticorrosion effect, the service life of the pipe is seriously shortened, and the use cost of the pipe joint is increased.
SUMMERY OF THE UTILITY MODEL
In order to overcome the disadvantages of the prior art, the present invention provides a composite metal joint which has a simple structure, does not damage the pipe when the pipe joint is fastened, and improves the fastening efficiency of the pipe joint when manufacturing.
In order to achieve the purpose, the utility model adopts the following technical scheme that a composite metal joint comprises a screw head core tube assembly and a flat head core tube assembly, the end parts of the screw head core tube assembly and the flat head core tube assembly are fixedly connected through a nut, sleeves are respectively sleeved outside the end parts of the screw head core tube assembly and the flat head core tube assembly, which are far away from the nut, the inner wall of each sleeve and the outer wall of the screw head core tube assembly/the flat head core tube assembly form an annular cavity, a composite tube is inserted into the annular cavity, and the screw head core tube assembly/the flat head core tube assembly, the composite tube and the sleeves which are sleeved together from inside to outside are mutually extruded into a whole;
and a stainless steel layer is arranged outside the screw head core tube assembly and the flat head core tube assembly, and a carbon steel layer is arranged outside the stainless steel layer of the screw head core tube assembly/the flat head core tube assembly outside the sleeve.
The outer wall of the screw head core tube assembly/the flat head core tube assembly and the composite tube are buckled and pressed is provided with a plurality of buckling and pressing teeth, and the inner wall of the sleeve and the composite tube are buckled and pressed is provided with a plurality of buckling and pressing grooves.
The end part of the screw head core tube assembly/flat head core tube assembly connected with the sleeve is provided with an annular groove, and the end part of the sleeve is inserted into the annular groove to be connected with the screw head core tube assembly/flat head core tube assembly.
The composite pipe comprises an inner PE pipe layer, a nylon layer and an outer PE pipe layer from inside to outside in sequence.
The end parts of the screw head core tube assembly and the flat head core tube assembly which are connected are respectively provided with a sealing groove, and a sealing ring is arranged in each sealing groove.
The utility model has the advantages that: the structure is simple, the damage to the anticorrosive coating in the buckling process can be effectively prevented, the use efficiency of the metal joint is improved, the effective drift diameter is relatively enlarged, the flow resistance of the metal joint is reduced, and the cost is reduced; when the device is used, the outer shrinkage female die can be quickly replaced according to requirements, and the working efficiency is improved.
Drawings
FIG. 1 is a schematic structural view of a metal joint according to the present invention;
FIG. 2 is a schematic structural view of the nipple-core tube assembly of the present invention;
FIG. 3 is a schematic structural view of the sleeve of the present invention;
FIG. 4 is a schematic structural view of a crimping apparatus employed in the embodiment;
fig. 5 is a side view of the crimping device in use.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
Example 1
As shown in fig. 1, a composite metal joint comprises a screw head core tube assembly 1 and a flat head core tube assembly 4, wherein the ends of the screw head core tube assembly 1 and the flat head core tube assembly 4 are fixedly connected through a nut 3, the ends of the screw head core tube assembly 1 and the flat head core tube assembly 4, which are far away from the nut 3, are respectively sleeved with a sleeve 2, the inner wall of the sleeve 2 and the outer wall of the screw head core tube assembly 1/the flat head core tube assembly 4 form an annular cavity, a composite tube 5 is inserted into the annular cavity, and the screw head core tube assembly 1/the flat head core tube assembly 4, the composite tube 5 and the sleeve 2 which are sleeved together from inside to outside are mutually extruded into a whole;
the outer circumferential surface of the end part connected with the screw head core tube assembly 1 and the flat head core tube assembly 4 is provided with external threads in the same direction, when in connection, the connecting ends of the screw head core tube assembly 1 and the flat head core tube assembly 4 are butted and then fixedly connected by adopting the nut 3, when in fixed connection by adopting the nut, the positioning pin is firstly used for positioning, and then the nut is in threaded connection with the external threads in the same direction on the outer circumferential surface of the end part connected with the screw head core tube assembly 1 and the flat head core tube assembly 4, so that the purpose of fixed connection is realized;
the composite pipe 3 inserted into the annular cavity formed by the inner wall of the sleeve 2 and the outer wall of the screw head core pipe assembly 1/flat head core pipe assembly 4 can be tightly contacted with the inner wall of the sleeve 2 and the outer wall of the screw head core pipe assembly 1/flat head core pipe assembly 4, so that the sealing property of the manufactured composite metal joint is ensured, and the composite metal joint can be mutually compressed and attached into a whole after internal expansion and external contraction are carried out; in order to ensure that the joint is more reliable in the process of internal expansion and external contraction and to improve the reliability of the whole composite metal joint, as shown in fig. 2 and 3, a plurality of buckling teeth 103 are arranged on the buckled outer wall of the screw head core tube assembly 1/flat head core tube assembly 4 and the composite tube 5, a plurality of buckling grooves 201 are arranged on the buckled inner wall of the sleeve 2 and the composite tube 5, when the internal expansion and the external contraction are carried out, the screw head core tube assembly 1/flat head core tube assembly 4 is expanded internally, the tube body of the screw head core tube assembly 1/flat head core tube assembly 4 is propped outwards, a plurality of buckling teeth 103 are arranged on the buckled outer wall of the screw head core tube assembly 1/flat head core tube assembly 4 and the composite tube 5 and enter the composite tube 5, the screw head core tube assembly 1/flat head core tube assembly 4 and the composite tube are tightly pressed together, and the sleeve 2 is compressed outwards, inwards pressing is carried out, so that the part of the composite pipe 5, which is contacted with the buckling groove 201 on the inner wall of the sleeve 2, enters the buckling groove 201, the sleeve 2 and the composite pipe are tightly pressed together, and the purpose that the screw head core pipe assembly 1/the flat head core pipe assembly 4, the composite pipe and the sleeve are buckled and pressed together is realized;
when the composite pipe is expanded and contracted outwards, in order to ensure that the composite pipe can enter the sleeve 2 and the screw head core pipe assembly 1/the flat head core pipe assembly 4 mutually, the depth of the composite pipe does not influence the performance of the composite pipe, the composite pipe sequentially comprises an inner PE pipe layer, a nylon layer and an outer PE pipe layer from inside to outside, and the structure of the composite pipe cannot be influenced when the composite pipe is expanded and contracted outwards.
In order to prevent the anticorrosive coating of the metal joint from being damaged when the metal joint is expanded and contracted, the screw head core tube assembly 1 and the plain end core tube assembly 4 consist of a stainless steel body 101 and a carbon steel layer 102 coated outside the stainless steel body 101, and the carbon steel layer 102 is positioned on the stainless steel body 101 of the screw head core tube assembly 1/the plain end core tube assembly 4 outside the sleeve 2;
specifically, the screw head core tube assembly and the plain end core tube assembly are formed by cold die pressing, blank materials of workpieces are saved, the screw head core tube assembly and the plain end core tube assembly are made of stainless steel materials, carbon steel layers are arranged on the parts, outside the sleeve, of the screw head core tube assembly 1 and the plain end core tube assembly 4, the stainless steel and carbon steel assemblies are adopted, stability during threaded connection can be guaranteed, and meanwhile the corrosion resistance of the whole composite metal joint is effectively improved.
Furthermore, in order to facilitate the sealing performance of the whole metal composite pipe joint after the sleeve and the wire head core pipe assembly 1 and the flat head core pipe assembly 4 are connected, sealing grooves 105 are respectively arranged at the connecting ends of the wire head core pipe assembly 1 and the flat head core pipe assembly 4, and sealing rings are arranged in the sealing grooves 105, so that the sealing performance of the connected wire head core pipe assembly 1 and the flat head core pipe assembly 4 can be effectively ensured.
Example 2
When internal expansion and external contraction buckling is specifically performed, the buckling and pressing device adopted in this embodiment includes, as shown in fig. 4 and 5, a bracket 601, a front support plate 602 and a rear support plate 603 which are fixedly connected to two sides of the upper end of the bracket 601 and are parallel to each other, a connecting rod 605 is arranged between the front support plate 602 and the rear support plate 603, one end of the connecting rod 605 penetrates through the front support plate 602 to be fixedly connected with a hydraulic telescopic cylinder 604 on the outer end face of the front support plate 602, the hydraulic telescopic cylinder 604 drives the connecting rod 605 to perform transverse movement, and the other end of the connecting rod 605 is fixedly connected with an internal expansion head 606;
the bracket 601 is used as the basis of the whole crimping device, the specific structure of the bracket is determined according to the stability of the bracket in the design process, the front support plate 602 and the rear support plate 603 are fixedly connected to the front end and the rear end of the bracket 601 through screws and are symmetrically arranged with each other, and the inner sides of the front support plate and the rear support plate 603 are in a space formed by the front support plate and the rear support plate; through holes 616 are formed in the middle of the front support plate 602 and the rear support plate 603, and the center lines of the through holes 616 formed in the front support plate and the rear support plate are coaxial, so that the connecting rod 605 can move transversely in the through holes 616.
The hydraulic telescopic cylinder 604 is communicated with a hydraulic station 608, the hydraulic station 608 provides hydraulic power for the hydraulic telescopic cylinder, and in the using process, the hydraulic station 608 provides relative hydraulic pressure for the hydraulic telescopic cylinder, so that the hydraulic telescopic cylinder drives the connecting rod and the inner expansion head to move transversely;
the inner end surface of the front support plate 602 is movably connected with a chuck connection plate 610, and the clamping connection plate 610 moves relative to the front support plate 602, in order to ensure that the chuck connection plate 610 can move stably relative to the front support plate 602, the upper and lower ends of the front and rear support plates 602 and 603 are fixedly connected by guide posts 614, respectively, the latch connection plate 610 is movably connected to the guide posts 614, and moves along the guide post 614, both ends of the guide post 614 respectively pass through the front support plate and the rear support plate and are fixedly connected with the front support plate and the rear support plate through bolts, guide sleeves are embedded at the upper end and the lower end of the clamping connection plate 610, the guide posts 614 are arranged in the guide cylinders in a penetrating way to movably connect the clamping connection plate 610 with the guide posts 614, and when joint connecting plate 610 moves on the guide pillar, reduce frictional force, improve joint connecting plate 610's removal effect.
The inner expansion head 606 is close to the central line position of the inner expansion head 606 of the extension part at the end part of the front support plate 603 and smoothly contracts, the diameter of the inner expansion head 606 is slightly larger than that of the filament head core tube assembly 1, and the diameter of the inner expansion head is larger than that of the filament head core tube assembly 1, so that when the inner expansion head enters the filament head core tube assembly 1, the filament head core tube assembly 1 can be expanded from inside to outside, and the filament head core tube assembly 1, the composite tube 5 and the sleeve 2 are extruded and extruded into a whole; the inner expansion head is used for carrying out inner expansion, so that the effective drift diameter of the pipe joint is ensured to be relatively enlarged, the flow resistance of the metal joint is reduced, and the cost is reduced.
And an outer shrinkage cavity die 607 which is used for performing outer shrinkage after the inner expansion of the screw head core tube assembly 1, the composite tube 5 and the sleeve 2 is fixedly arranged on the inner end surface of the rear supporting plate 603, and the central line of the outer shrinkage cavity die 607 and the central lines of the connecting rod 605 and the through hole 616 in the middle of the rear supporting plate 603 are positioned on the same horizontal line. The external shrinkage female die 607 is mainly used for externally shrinking the pipe subjected to internal expansion and further fixing and extruding the filament core pipe assembly, the composite pipe 5 and the sleeve 2 into a whole, in order to ensure that the filament core pipe assembly 1, the composite pipe 5 and the sleeve 2 subjected to internal expansion can be pushed into the external shrinkage groove 607 to be stably shrunk when the hydraulic telescopic cylinder drives the connecting rod to push the rear supporting plate end, the front end of a female die hole in the external shrinkage female die 607 is provided with a guide hole, the diameter of the guide hole is larger than that of the sleeve 603, the diameter of the female die hole of the external shrinkage female die 607 is slightly smaller than that of the sleeve 603, the guide hole can ensure that the connecting rod drives the internally expanded pipe assembly to enter the hole of the external shrinkage female die, the diameter of the female die hole is smaller than that of the sleeve 2, and the sleeve shrinks outwards under the pushing of the connecting rod, and is connected with the filament core pipe assembly 1, the composite pipe 5 and the sleeve 2, The composite pipe 5 is extruded in an outward shrinkage mode, and the reliability of the pipe after buckling is guaranteed.
When the tool is used, in order to ensure that the different types of sleeves are conveniently and efficiently replaced when the different types of sleeves are shrunk outwards through the different types of shrinking female dies, as shown in fig. 5, the inner end surface of the rear supporting plate 603 is fixedly connected with a fixing plate 613, the upper end and the lower end of the fixing plate 613 are respectively and fixedly provided with an upper positioning oil cylinder 615 and a lower positioning oil cylinder 612, the telescopic ends of the upper positioning oil cylinder 615 and the lower positioning oil cylinder 612 are arranged oppositely, the telescopic ends of the upper positioning oil cylinder 615 and the lower positioning oil cylinder 612 are respectively and fixedly connected with push plates 611 which are mutually symmetrical up and down, and the shrinking female die 7 is clamped between the push plates 611 connected with the upper positioning oil cylinder 615 and the lower positioning oil cylinder 612.
When the telescopic positioning device is used, the outer concave die is quickly positioned and fixed under the combined action of the upper positioning oil cylinder 615 and the lower positioning oil cylinder 612, the end face of the push plate 611 is matched with the end face of the outer concave die, the outer concave die can be stably clamped, pushed and positioned, the outer concave die matched with the sleeve is placed on the push plate 611 of the lower positioning oil cylinder 612 when the telescopic positioning device is used, the upper positioning oil cylinder pushes the push plate 611 connected with the upper positioning oil cylinder to be downwards buckled, the outer concave die is fixed, the telescopic amount of the upper positioning oil cylinder 615 and the telescopic amount of the lower positioning oil cylinder 612 are synchronously adjusted according to positioning requirements, the outer concave die is positioned, after the outer concave die is fixedly clamped, when the telescopic amount of the upper positioning oil cylinder and the telescopic amount of the lower positioning oil cylinder are adjusted, the telescopic amounts are the same, and the telescopic modes of the upper positioning oil cylinder and the lower positioning oil cylinder are opposite.
When the whole composite metal joint is buckled and pressed; the method comprises the following steps:
the method comprises the following steps: respectively sleeving the screw head core tube assembly 1 and the flat head core tube assembly 4 with the sleeve 2, and then respectively inserting the composite tubes 5 into annular cavities formed by the screw head core tube assembly 1, the sleeve 2/the flat head core tube assembly 4 and the sleeve 2 for standby;
step two: detaching an inner expansion head 606 in the buckling device from the connecting rod 605, sleeving a sleeving body formed by the screw head core tube assembly 1, the composite tube 5 and the sleeve 2 on the connecting rod 605, clamping the end part of the screw head core tube assembly 1 on the chuck 9, and finally connecting the detached inner expansion head 606 to the connecting rod 605;
step three: performing internal expansion operation, namely opening the hydraulic telescopic cylinder 604, pulling the connecting rod 605 and an internal expansion head 606 fixed on the connecting rod 605 to enter the screw head core tube assembly 1, and extruding the screw head core tube assembly 1 outwards in the process that the internal expansion head 606 enters the screw head core tube assembly 1, so that the screw head core tube assembly 1, the composite tube 5 and the sleeve 2 are subjected to internal expansion extrusion;
step four: outward shrinkage operation, wherein when the inner expansion head 606 enters the inner expansion position of the filament head core tube assembly 1, the hydraulic telescopic cylinder 604 pushes the connecting rod 606 to move towards the end part of the outward shrinkage concave die 607, the end part of the sleeve 2 enters the outward shrinkage concave die 607 and moves towards the inward shrinkage concave die 607, and the outward shrinkage concave die 607 performs outward shrinkage extrusion on the sleeve 2;
step five: the screw head core tube assembly 1, the composite tube 5 and the sleeve 2 which are subjected to the internal expansion operation and the external contraction operation are dismounted from the buckling device;
step six: performing internal expansion and external contraction operation on a sleeve joint body formed by the flat-head core tube assembly 4, the composite tube 5 and the sleeve 2 according to the sequence from the second step to the fifth step;
step seven: and butting and positioning the ends of the screw head core tube assembly 1 and the plain head core tube assembly 4 which are subjected to the internal expansion and external contraction operation, and fixedly connecting the ends through the nut 3 to finish the buckling and pressing installation of the whole composite metal joint.
By adopting the method, the pipe joint is effectively buckled and pressed by adopting an internal expansion and external contraction mode, so that the problem of damaging the reinforcing fiber caused by inconsistent buckling and pressing grip strength (uneven axial and radial grip strength) is solved, and the application reliability of the composite metal joint is improved.
The above embodiments are merely examples of the present invention, and do not limit the protection scope of the present invention, and all designs the same as or similar to the present invention belong to the protection scope of the present invention.
Claims (5)
1. The composite metal joint is characterized by comprising a screw head core tube assembly (1) and a flat head core tube assembly (4), wherein the ends of the screw head core tube assembly (1) and the flat head core tube assembly (4) are fixedly connected through a nut (3), a sleeve (2) is respectively sleeved outside the end, far away from the nut (3), of the screw head core tube assembly (1) and the flat head core tube assembly (4), the inner wall of the sleeve (2) and the outer wall of the screw head core tube assembly (1)/the flat head core tube assembly (4) form an annular cavity, a composite tube (5) is inserted into the annular cavity, and the screw head core tube assembly (1)/the flat head core tube assembly (4), the composite tube (5) and the sleeve (2) which are sleeved together from inside to outside are mutually extruded into a whole;
the wire head core tube assembly (1) and the flat head core tube assembly (4) are composed of a stainless steel body (101) and a carbon steel layer (102) coated outside the stainless steel body (101), and the carbon steel layer (102) is located on the stainless steel body (101) of the wire head core tube assembly (1)/the flat head core tube assembly (4) outside the sleeve (2).
2. The composite metal joint as claimed in claim 1, wherein the screw head core tube assembly (1)/the flat head core tube assembly (4) is provided with a plurality of buckling teeth (103) on the outer wall buckled with the composite tube (5), and the sleeve (2) is provided with a plurality of buckling grooves (201) on the inner wall buckled with the composite tube (5).
3. The composite metal joint as claimed in claim 1, wherein the end of the screw head core tube assembly (1)/flat head core tube assembly (4) connected with the sleeve (2) is provided with an annular groove (104), and the end of the sleeve (2) is inserted into the annular groove (104) to be connected with the screw head core tube assembly (1)/flat head core tube assembly (4).
4. The composite metal joint as claimed in claim 1, wherein the composite pipe (5) comprises an inner PE pipe layer, a nylon layer and an outer PE pipe layer.
5. The composite metal joint as claimed in claim 1, wherein the ends of the filament core-tube assembly (1) and the flat core-tube assembly (4) are respectively provided with a sealing groove (105), and a sealing ring is arranged in the sealing groove (105).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922165372.0U CN211203244U (en) | 2019-12-05 | 2019-12-05 | Composite metal joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922165372.0U CN211203244U (en) | 2019-12-05 | 2019-12-05 | Composite metal joint |
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| Publication Number | Publication Date |
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| CN211203244U true CN211203244U (en) | 2020-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922165372.0U Active CN211203244U (en) | 2019-12-05 | 2019-12-05 | Composite metal joint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110805768A (en) * | 2019-12-05 | 2020-02-18 | 陕西欣欣智能管业有限公司 | Composite metal joint and manufacturing method |
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2019
- 2019-12-05 CN CN201922165372.0U patent/CN211203244U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110805768A (en) * | 2019-12-05 | 2020-02-18 | 陕西欣欣智能管业有限公司 | Composite metal joint and manufacturing method |
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