CN219453155U - Carbon fiber reinforced flexible oil delivery pipe and connecting structure thereof - Google Patents
Carbon fiber reinforced flexible oil delivery pipe and connecting structure thereof Download PDFInfo
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- CN219453155U CN219453155U CN202320685896.6U CN202320685896U CN219453155U CN 219453155 U CN219453155 U CN 219453155U CN 202320685896 U CN202320685896 U CN 202320685896U CN 219453155 U CN219453155 U CN 219453155U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model provides a carbon fiber reinforced flexible oil delivery pipe and a connecting structure thereof, wherein the carbon fiber reinforced flexible oil delivery pipe comprises an inner liner layer, an outer protective layer and at least three carbon fiber unidirectional cloth layers positioned between the inner liner layer and the outer protective layer, and the at least three carbon fiber unidirectional cloth layers comprise a first carbon fiber unidirectional cloth layer, a second carbon fiber unidirectional cloth layer and a third carbon fiber unidirectional cloth layer; the first carbon fiber unidirectional cloth layer is coated outside the lining layer, and the strength direction of the first carbon fiber unidirectional cloth layer is consistent with the length extension direction of the lining layer; the second carbon fiber unidirectional cloth layer and the third carbon fiber unidirectional cloth layer are respectively spirally wound outside the lining layer, and the spiral direction of the winding of the second carbon fiber unidirectional cloth layer is opposite to the spiral direction of the winding of the third carbon fiber unidirectional cloth layer, and the strength directions of the second carbon fiber unidirectional cloth layer and the third carbon fiber unidirectional cloth layer respectively extend along the corresponding spiral directions. The scheme has the advantages of high strength, light weight and good flexibility.
Description
Technical Field
The utility model relates to the field of petroleum conveying pipelines, in particular to a carbon fiber reinforced flexible petroleum conveying pipe and a connecting structure thereof.
Background
The existing oil pipeline can be divided into a steel pipeline and a flexible pipeline according to characteristics, and compared with the steel pipeline, the flexible pipeline has the advantages of light weight, corrosion resistance, convenience in installation, capability of bending and the like, so that the flexible pipeline gradually replaces the steel pipeline in places with complex conveying environments.
The main structure of the existing flexible pipeline comprises: the steel belt pressure armor layer comprises a framework layer of a metal coil structure positioned at the innermost layer, a liquid-containing layer of a high polymer material, a spiral self-locking opposite steel belt pressure armor layer, two opposite spiral steel belt stretching layers and an outer protective layer. Such a pipe has the following disadvantages: the metal structure functional layer has great tension, is easily corroded by substances such as hydrogen sulfide gas, carbon dioxide gas and the like contained in oil gas, and has short service life; the fatigue resistance of the metal structure is poor, and the metal structure is easy to fatigue failure; secondly, the skeleton layer of the metal coil structure generates vortex-induced vibration in the fluid flowing process, and the friction coefficient of the structure is large, so that the fluid flow velocity is reduced, and the blockage is easily caused by wax precipitation and scaling.
Disclosure of Invention
In view of the foregoing drawbacks or shortcomings in the prior art, it is desirable to provide a carbon fiber reinforced flexible oil delivery pipe and a connection structure thereof that have the advantages of high strength, light weight, good flexibility, and the like.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
in a first aspect, the utility model provides a carbon fiber reinforced flexible oil delivery pipe, which comprises an inner liner layer, an outer protective layer and at least three carbon fiber unidirectional cloth layers positioned between the inner liner layer and the outer protective layer, wherein the at least three carbon fiber unidirectional cloth layers comprise a first carbon fiber unidirectional cloth layer, a second carbon fiber unidirectional cloth layer and a third carbon fiber unidirectional cloth layer;
the first carbon fiber unidirectional cloth layer is coated outside the lining layer, and the strength direction of the first carbon fiber unidirectional cloth layer is consistent with the length extension direction of the lining layer;
the second carbon fiber unidirectional cloth layer and the third carbon fiber unidirectional cloth layer are respectively spirally wound outside the lining layer, the spiral direction of the winding of the second carbon fiber unidirectional cloth layer is opposite to the spiral direction of the winding of the third carbon fiber unidirectional cloth layer, the strength directions of the second carbon fiber unidirectional cloth layer and the third carbon fiber unidirectional cloth layer respectively extend along the corresponding spiral directions, and gaps are formed between adjacent turns of the second carbon fiber unidirectional cloth layer and/or the third carbon fiber unidirectional cloth layer.
As an achievable mode, the third carbon fiber unidirectional cloth layer, the second carbon fiber unidirectional cloth layer and the first carbon fiber unidirectional cloth layer are sequentially arranged from the inner liner layer to the outer protective layer.
As an achievable mode, at least any one of the first carbon fiber unidirectional cloth layer, the second carbon fiber unidirectional cloth layer and the third carbon fiber unidirectional cloth layer is provided with a thermosetting resin layer.
As an achievable way, the inner liner is an oil-resistant fluororubber liner.
As an implementation manner, the outer protective layer is a vulcanized rubber layer.
As an realizable mode, an anti-adhesion layer is arranged between the adjacent carbon fiber unidirectional cloth layers, and the anti-adhesion layer is a nylon fiber layer.
As an achievable mode, the angles between the spiral tangent lines of the second carbon fiber unidirectional cloth layer and the third carbon fiber unidirectional cloth layer and the extending direction of the length of the inner liner layer are 30-75 degrees.
The utility model provides a connecting structure of a carbon fiber reinforced flexible oil delivery pipe, which comprises a pipe joint and oil pipes connected to two ends of the pipe joint, wherein the oil pipes are the carbon fiber reinforced flexible oil delivery pipe, the pipe joint comprises a joint main body and two compression nuts, an axial through hole for fluid to pass through is formed in the joint main body, a flange is arranged in the middle of the joint main body, the joint main body is bilaterally symmetrical with respect to the flange, steps are arranged on the left side and the right side close to the flange, external threads are arranged on the steps, and annular inclined planes are arranged on the left end and the right end of the joint main body; the compression nut is close to one end of the flange and is provided with an internal thread matched with the external thread, the other end of the compression nut is provided with an annular edge protruding inwards in the radial direction, and the annular edge is used for tightly crimping the pipe wall of the carbon fiber reinforced flexible oil pipeline and the joint main body together.
As an implementation mode, the aperture of the axial through hole in the joint main body is smaller than or equal to the inner diameter of the carbon fiber reinforced flexible oil delivery pipe, and the outer diameters of the left end and the right end of the joint main body are larger than the inner diameter of the carbon fiber reinforced flexible oil delivery pipe.
As an realizable mode, an annular groove is arranged between the annular inclined plane and the step on the joint main body, and one end of the carbon fiber reinforced flexible oil delivery pipe is positioned in the annular groove; and a compression thread is arranged at the innermost side of the annular edge at one end of the compression nut.
Above-mentioned scheme is through setting up the one-way cloth layer of at least three-layer carbon fiber that intensity direction is different, compares in the hose oil pipe that adopts metal coil structure framework layer, and the flexible defeated oil pipe of carbon fiber reinforcement of this scheme has intensity height, light in weight, advantage that the pliability is good.
Drawings
Fig. 1 is a schematic structural diagram of a carbon fiber reinforced flexible oil delivery pipe provided by the utility model.
Fig. 2 is a cross-sectional view of a connection structure of a carbon fiber reinforced flexible oil delivery pipe provided by the utility model.
Fig. 3 is a schematic structural view of a pipe joint according to the present utility model.
Reference numerals illustrate:
the flexible oil delivery pipe comprises a 1-carbon fiber reinforced flexible oil delivery pipe, an 11-end part, a 101-inner liner layer, a 102-third carbon fiber unidirectional cloth layer, a 103-first anti-bonding layer, a 104-second carbon fiber unidirectional cloth layer, a 105-second anti-bonding layer, a 106-first carbon fiber unidirectional cloth layer, a 107-outer protective layer and 108-gaps;
2-compression nut, 21-annular edge, 22-internal thread, 23-compression thread;
3-joint body, 31-annular chamfer, 32-annular groove, 33-external thread, 34-step, 35-flange, 36-axial through hole.
Detailed Description
The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the utility model are shown in the drawings.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
In a first aspect, referring to fig. 1, the carbon fiber reinforced flexible oil delivery pipe 1 provided by the present utility model includes an inner liner 101 (also referred to as an inner liner), an outer protective layer 107, and at least three carbon fiber unidirectional cloth layers located between the inner liner 101 and the outer protective layer 107. In this example, three carbon fiber unidirectional cloth layers are provided, although in other examples, more numbers of three carbon fiber unidirectional cloth layers may be provided.
The carbon fiber unidirectional cloth referred to herein is a carbon fiber cloth having a large number of carbon fiber filaments in one direction (typically the warp direction of the warp and weft structure), that is, a large number of carbon fiber filaments extending in the warp direction, and having only a small number of and typically thin, short carbon fiber filaments in the other direction (e.g., the weft direction), so that the overall strength of the cloth is mainly one carbon fiber cloth in the same direction, then that direction is the strength direction of the carbon fiber unidirectional cloth, which is also consistent with the continuation direction of the large number of carbon fiber filaments as described above.
The three carbon fiber unidirectional cloth layers may be referred to as a first carbon fiber unidirectional cloth layer 106, a second carbon fiber unidirectional cloth layer 104, and a third carbon fiber unidirectional cloth layer 102, respectively.
The first carbon fiber unidirectional cloth layer 106, the second carbon fiber unidirectional cloth layer 104, and the third carbon fiber unidirectional cloth layer 102 are stacked on each other, and the stacking order thereof may be determined according to actual conditions, and in this example, the third carbon fiber unidirectional cloth layer 102, the second carbon fiber unidirectional cloth layer 104, and the first carbon fiber unidirectional cloth layer 107 are sequentially disposed from the inner liner layer 101 to the outer protective layer 107.
The first carbon fiber unidirectional cloth layer 106 is wrapped outside the inner liner layer 101, and the strength direction of the first carbon fiber unidirectional cloth layer 106 is consistent with the length extension direction of the inner liner layer 101. That is, a piece of carbon fiber unidirectional cloth may be adopted, so that the strength direction of the carbon fiber unidirectional cloth is consistent with the length extending direction of the inner liner 101, and the carbon fiber unidirectional cloth is wrapped outside the inner liner at least around 360 degrees, so that the outer side of the inner liner 101 is integrally wrapped, and the tensile strength of the carbon fiber reinforced flexible oil delivery pipe 1 is improved to the greatest extent.
The second carbon fiber unidirectional cloth layer 104 and the third carbon fiber unidirectional cloth layer 102 are respectively spirally wound outside the inner liner layer 101, and the spiral direction of winding the second carbon fiber unidirectional cloth layer 104 is opposite to the spiral direction of winding the third carbon fiber unidirectional cloth layer 102, namely one of the two is left-handed and the other is right-handed; the strength directions of the second carbon fiber unidirectional cloth layer 104 and the third carbon fiber unidirectional cloth layer 102 extend along the corresponding spiral directions, and gaps 108 are formed between adjacent turns of the second carbon fiber unidirectional cloth layer 104 and/or the third carbon fiber unidirectional cloth layer 102.
In this example, the second carbon fiber unidirectional cloth layer 104 has voids 108 between adjacent turns; and, the third carbon fiber unidirectional cloth layer 102 has a gap 108 between adjacent turns. Of course, in other examples, there may be a gap 108 between any adjacent turns of the second carbon fiber unidirectional cloth layer 104 and the third carbon fiber unidirectional cloth layer 102.
When the second carbon fiber unidirectional cloth layer 104 and/or the third carbon fiber unidirectional cloth layer 102 are wound, gaps are reserved between adjacent turns, so that the second carbon fiber unidirectional cloth layer 104 and/or the third carbon fiber unidirectional cloth layer 102 form a spring-like structure, and the flexibility of the carbon fiber reinforced flexible oil delivery pipe 1 is much better than that of a structure without gaps. The second carbon fiber unidirectional cloth layer 104 and the third carbon fiber unidirectional cloth layer 102 are wound in opposite directions, so that the anti-torsion capability of the carbon fiber reinforced flexible oil delivery pipe 1 can be enhanced.
Further, in order to form the carbon fiber unidirectional fabric layers, at least one of the first carbon fiber unidirectional fabric layer 106, the second carbon fiber unidirectional fabric layer 104, and the third carbon fiber unidirectional fabric layer 102 is provided with a thermosetting resin layer.
As one preferable mode, thermosetting resin layers are disposed on the outer sides of the first carbon fiber unidirectional cloth layer 106, the second carbon fiber unidirectional cloth layer 104, and the third carbon fiber unidirectional cloth layer 102.
For example, before winding, thermosetting resin layers may be provided on the outer sides of the first carbon fiber unidirectional cloth layer 106, the second carbon fiber unidirectional cloth layer 104, and the third carbon fiber unidirectional cloth layer 102, and after winding, heating may be performed to maintain the first carbon fiber unidirectional cloth layer 106, the second carbon fiber unidirectional cloth layer 104, and the third carbon fiber unidirectional cloth layer 102 in the wound shape.
Further, the inner liner 101 is made of oil-resistant fluororubber, the surface of the oil-resistant fluororubber is smooth, scaling can be prevented, and the overall service life of the carbon fiber reinforced flexible oil delivery pipe 1 can be prolonged due to the excellent oil resistance.
Further, the outer protective layer 7 is made of vulcanized rubber, which has high elasticity, heat resistance, tensile strength and excellent property of being insoluble in organic solvents.
Further, an anti-adhesion layer is respectively arranged between the adjacent carbon fiber unidirectional cloth layers, in this example, a first anti-adhesion layer 103 and a second anti-adhesion layer 105 are arranged, and the anti-adhesion layer is made of nylon fibers. The anti-sticking layers are arranged between the carbon fiber unidirectional cloth layers, so that the adhesion between the carbon fiber unidirectional cloth layers can be avoided, the friction between the carbon fiber unidirectional cloth layers is reduced, and the flexibility of the carbon fiber reinforced flexible oil delivery pipe 1 is further ensured.
Further, the angle α between the spiral tangent line of the second carbon fiber unidirectional cloth layer 104 and the third carbon fiber unidirectional cloth layer 102 and the extending direction of the length of the inner liner layer 101 is 30 ° to 75 °. The magnitude of the angle is related to the stretchability of the carbon fiber reinforced flexible oil pipe 1, and the larger the angle α is, the better the stretchability of the carbon fiber reinforced flexible oil pipe 1 is.
Referring to fig. 2 and 3, an embodiment of the present utility model provides a connection structure of a carbon fiber reinforced flexible oil delivery pipe, including a pipe joint and oil pipes connected to two ends of the pipe joint, where the oil pipes are the carbon fiber reinforced flexible oil delivery pipe 1 of each example, the pipe joint includes a joint body 3 and two compression nuts 2, an axial through hole 36 for fluid to pass through is provided in the joint body 3, a flange 35 is provided in the middle of the joint body 3, the flange 35 can be used for clamping by a wrench during assembly, the joint body 3 is bilaterally symmetrical with respect to the flange 35, steps 34 are respectively provided on left and right sides near the flange 35, external threads 33 are provided on the steps 34, and annular inclined planes 31 are provided on left and right ends of the joint body 3, so that the carbon fiber reinforced flexible oil delivery pipe 1 can be conveniently threaded onto the joint body 3 by providing the annular inclined planes 31; one end of the compression nut 2, which is close to the flange 35, is provided with an internal thread 22 matched with an external thread 33 on the joint main body 3, and the other end of the compression nut is provided with a radial inward protruding annular edge 21, and the annular edge 21 is used for tightly crimping the pipe wall of the carbon fiber reinforced flexible oil delivery pipe 1 with the joint main body 3.
Further, the diameter of the axial through hole 36 in the joint main body 3 is smaller than or equal to the inner diameter of the carbon fiber reinforced flexible oil delivery pipe 1, the outer diameters of the left end and the right end of the joint main body 3 are larger than the inner diameter of the carbon fiber reinforced flexible oil delivery pipe 1, and the smaller the diameter of the axial through hole 36 in the joint main body 3 is, the larger the resistance to the flow of the fluid in the carbon fiber reinforced flexible oil delivery pipe 1 is. Generally, the outer diameter of the two ends of the joint main body 3 is slightly larger than the inner diameter of the carbon fiber reinforced flexible oil delivery pipe 1, so that the tight fit between the carbon fiber reinforced flexible oil delivery pipe 1 and the joint main body 3 is ensured, and the situation that the carbon fiber reinforced flexible oil delivery pipe 1 and the joint main body 3 are loosened before the compression nut 2 is screwed in the installation process is avoided.
Further, an annular groove 32 is provided between the annular inclined surface 31 and the step 34 on the joint body 3, and one end of the carbon fiber reinforced flexible oil delivery pipe 1 is located in the annular groove 32. When the carbon fiber reinforced flexible oil delivery pipe 1 is sleeved at two ends of the joint main body 3, the annular groove 32 can enable the end 11 of the carbon fiber reinforced flexible oil delivery pipe 1 to be sunk in, so that the carbon fiber reinforced flexible oil delivery pipe 1 and the joint main body 3 are prevented from loosening when the compression nut 2 is screwed in.
Further, the innermost side of the annular edge 21 at one end of the compression nut 2 is provided with a compression thread 23, and the sharp point of the compression thread 23 can puncture the outer protective layer 107 of the carbon fiber reinforced flexible oil delivery pipe 1, so as to increase the biting force of the compression nut 2 and the carbon fiber reinforced flexible oil delivery pipe 1, wherein the internal thread 22 and the compression thread 23 have the same rotation direction, i.e. are both left-handed threads or both right-handed threads, and when in assembly, the compression nut 2 can drive the carbon fiber reinforced flexible oil delivery pipe 1 to feed, and meanwhile, the binding force of the pipe joint and the carbon fiber reinforced flexible oil delivery pipe 1 can be improved.
It is to be understood that the above references to the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are for convenience in describing the present utility model and simplifying the description only, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
Finally, it should be noted that: although the present utility model and its advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims. Furthermore, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, means, method and steps described in the specification. Those of ordinary skill in the art will readily appreciate from the disclosure of the present utility model, processes, machines, means, or steps, presently existing or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the present utility model. Accordingly, the appended claims are intended to include within their scope such processes, apparatuses, means, methods, or steps.
Claims (10)
1. The carbon fiber reinforced flexible oil delivery pipe is characterized by comprising an inner liner layer, an outer protective layer and at least three carbon fiber unidirectional cloth layers positioned between the inner liner layer and the outer protective layer, wherein the at least three carbon fiber unidirectional cloth layers comprise a first carbon fiber unidirectional cloth layer, a second carbon fiber unidirectional cloth layer and a third carbon fiber unidirectional cloth layer;
the first carbon fiber unidirectional cloth layer is coated outside the lining layer, and the strength direction of the first carbon fiber unidirectional cloth layer is consistent with the length extension direction of the lining layer;
the second carbon fiber unidirectional cloth layer and the third carbon fiber unidirectional cloth layer are respectively spirally wound outside the lining layer, the spiral direction of the winding of the second carbon fiber unidirectional cloth layer is opposite to the spiral direction of the winding of the third carbon fiber unidirectional cloth layer, the strength directions of the second carbon fiber unidirectional cloth layer and the third carbon fiber unidirectional cloth layer respectively extend along the corresponding spiral directions, and gaps are formed between adjacent turns of the second carbon fiber unidirectional cloth layer and/or the third carbon fiber unidirectional cloth layer.
2. The carbon fiber reinforced flexible oil delivery pipe of claim 1, wherein the third carbon fiber unidirectional cloth layer, the second carbon fiber unidirectional cloth layer, and the first carbon fiber unidirectional cloth layer are sequentially disposed from the inner liner layer to the outer protective layer.
3. The carbon fiber reinforced flexible oil delivery pipe according to claim 1 or 2, wherein at least any one of the first carbon fiber unidirectional cloth layer, the second carbon fiber unidirectional cloth layer, and the third carbon fiber unidirectional cloth layer is provided with a thermosetting resin layer on the outside.
4. A carbon fibre reinforced flexible oil delivery pipe as claimed in claim 1 or claim 2 wherein the inner liner is an oil resistant fluororubber liner.
5. A carbon fibre reinforced flexible oil delivery pipe as claimed in claim 1 or claim 2 wherein the outer protective layer is a vulcanized rubber layer.
6. A carbon fiber reinforced flexible oil delivery pipe as claimed in claim 1 or 2, wherein an anti-sticking layer is arranged between adjacent carbon fiber unidirectional cloth layers, and the anti-sticking layer is a nylon fiber layer.
7. The carbon fiber reinforced flexible oil delivery pipe according to claim 1 or 2, wherein the angle between the spiral tangent line of the second carbon fiber unidirectional cloth layer and the third carbon fiber unidirectional cloth layer and the extending direction of the length of the inner liner layer is 30-75 °.
8. The connecting structure of the carbon fiber reinforced flexible oil delivery pipe is characterized by comprising a pipe joint and oil pipes connected to two ends of the pipe joint, wherein the oil pipes are the carbon fiber reinforced flexible oil delivery pipe according to any one of claims 1-7, the pipe joint comprises a joint main body and two compression nuts, an axial through hole for fluid to pass through is formed in the joint main body, a flange is arranged in the middle of the joint main body, the joint main body is bilaterally symmetrical relative to the flange, steps are arranged on the left side and the right side close to the flange, external threads are arranged on the steps, and annular inclined planes are arranged on the left end and the right end of the joint main body; the compression nut is close to one end of the flange and is provided with an internal thread matched with the external thread, the other end of the compression nut is provided with an annular edge protruding inwards in the radial direction, and the annular edge is used for tightly crimping the pipe wall of the carbon fiber reinforced flexible oil pipeline and the joint main body together.
9. The connection structure of a carbon fiber reinforced flexible oil pipe according to claim 8, wherein the diameter of the axial through hole in the joint body is smaller than or equal to the inner diameter of the carbon fiber reinforced flexible oil pipe, and the outer diameters of the left and right ends of the joint body are larger than the inner diameter of the carbon fiber reinforced flexible oil pipe.
10. The connection structure of a carbon fiber reinforced flexible oil delivery pipe according to claim 8 or 9, wherein an annular groove is arranged between the annular inclined surface and the step on the joint main body, and one end of the carbon fiber reinforced flexible oil delivery pipe is positioned in the annular groove; and a compression thread is arranged at the innermost side of the annular edge at one end of the compression nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320685896.6U CN219453155U (en) | 2023-03-31 | 2023-03-31 | Carbon fiber reinforced flexible oil delivery pipe and connecting structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320685896.6U CN219453155U (en) | 2023-03-31 | 2023-03-31 | Carbon fiber reinforced flexible oil delivery pipe and connecting structure thereof |
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| Publication Number | Publication Date |
|---|---|
| CN219453155U true CN219453155U (en) | 2023-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320685896.6U Active CN219453155U (en) | 2023-03-31 | 2023-03-31 | Carbon fiber reinforced flexible oil delivery pipe and connecting structure thereof |
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| Country | Link |
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| CN (1) | CN219453155U (en) |
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- 2023-03-31 CN CN202320685896.6U patent/CN219453155U/en active Active
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