CN121383108A - Optical fiber protection device, butt joint structure and butt joint method of hydrogen-transporting flexible pipeline - Google Patents

Abstract

The application provides an optical fiber protection device, a butt joint structure and a butt joint method of a hydrogen transmission flexible pipeline, wherein the optical fiber protection device comprises an annular shell, the shell is detachably sleeved on the periphery of the end part of the hydrogen transmission flexible pipeline, a plurality of optical fiber jumper connectors are circumferentially distributed on the shell, a filling protection cavity is arranged in the shell, a penetrating groove for penetrating an optical fiber is formed in the side wall of the filling protection cavity, an elastic buffer member is filled in the filling protection cavity, a plurality of threading channels connected between the optical fiber jumper connectors and the penetrating groove are formed in the elastic buffer member, and the optical fiber jumper connectors are used for being connected with the end parts of the optical fibers. The application provides protection for the optical fibers led out by the health monitoring in the hydrogen-conveying flexible pipeline through the optical fiber protection device, and the optical fiber jumper connector on the protection device can simply, conveniently and efficiently connect the detection optical fibers of different hydrogen-conveying flexible pipeline sections, thereby playing a great protection role when improving the connection of the health monitoring optical fibers of the hydrogen-conveying flexible pipeline.

Description

Optical fiber protection device, butt joint structure and butt joint method of hydrogen-transporting flexible pipeline

Technical Field

The invention relates to the technical field of detection of hydrogen-conveying flexible pipelines, in particular to an optical fiber protection device, a butt joint structure and a butt joint method of a hydrogen-conveying flexible pipeline.

Background

The flexible hydrogen transmission pipeline has the advantages of high flexibility, convenient installation, adaptation to complex terrains and the like, is widely applied to the fields of long-distance transportation of hydrogen energy, hydrogenation station pipe networks and the like, is a key tie for connecting hydrogen production, storage and application, and the safe operation of the flexible hydrogen transmission pipeline is directly related to the sustainable development of the hydrogen energy industry.

At present, a multi-layer composite structure (such as a polyolefin lining layer, a carbon fiber winding reinforcing layer and a weather-resistant outer sheath) is adopted for the flexible hydrogen transmission pipeline, the flexible hydrogen transmission pipeline needs to bear a high-pressure hydrogen environment of more than 35MPa for a long time, and the flexible hydrogen transmission pipeline faces multiple tests such as hydrogen embrittlement corrosion, cold-hot cycle fatigue (-40 ℃ to 80 ℃) and vibration impact, and has outstanding risks such as pipeline cracking and hydrogen leakage. Therefore, the method is particularly important for the full life cycle health monitoring of the hydrogen transmission flexible pipeline (400), and the optical fiber sensing technology becomes a mainstream scheme for realizing the full life cycle safety monitoring of the hydrogen transmission flexible pipeline due to the characteristics of electromagnetic interference resistance, corrosion resistance, distributable sensing of temperature, strain, hydrogen leakage and the like.

In the prior art, optical fibers are generally buried in a reinforcing layer of a pipeline, and the leading-out ends are fixed by bonding or are directly exposed outside, so that the problem that the existing rigid shell cannot adapt to the flexibility of the optical fibers due to the fact that the dynamic deformation (such as bending and stretching) of a hydrogen-transmitting flexible pipeline is far larger than that of a rigid pipeline is caused by the fact that the leading-out ends of the optical fibers lack of effective support and protection and are easy to break due to friction and pulling, and the damage of the optical fibers is possibly aggravated by the curling stress of the optical fibers.

Disclosure of Invention

The invention aims to provide an optical fiber protection device, a butt joint structure and a butt joint method of a hydrogen transmission flexible pipeline, which are used for solving one or more technical problems in the prior art and at least providing a beneficial choice or creation condition.

The technical scheme adopted for solving the technical problems is as follows:

The invention provides an optical fiber protection device for a hydrogen-conveying flexible pipeline, which comprises a ring-shaped shell, wherein the shell is used for being detachably sleeved on the periphery of the end part of the hydrogen-conveying flexible pipeline, a plurality of optical fiber jumper connectors are circumferentially distributed on the shell, a filling protection cavity is arranged in the shell, a penetrating groove for penetrating an optical fiber is formed in the side wall of the filling protection cavity, an elastic buffer member is filled in the filling protection cavity, a plurality of threading channels connected between the optical fiber jumper connectors and the penetrating groove are formed in the elastic buffer member, and a plurality of optical fiber jumper connectors are used for being connected with the end parts of a plurality of optical fibers.

The beneficial effects of the invention are as follows:

The optical fiber protection device provides protection for the optical fibers led out from the health monitoring in the hydrogen-conveying flexible pipeline, the optical fiber jumper connector on the protection device can simply, conveniently and efficiently connect the detection optical fibers of different hydrogen-conveying flexible pipeline sections, and the optical fibers led out from the health monitoring can be connected to equipment such as a demodulator, so that the connection of the optical fibers for health monitoring of the hydrogen-conveying flexible pipeline is improved, and meanwhile, the optical fiber protection device plays a great protection role.

As a further improvement of the above technical solution, the elastic buffer member includes a buffer foam.

As a further improvement of the above technical solution, the housing includes a plurality of protective cases, and the plurality of protective cases are detachably connected in the circumferential direction.

As a further improvement of the above technical solution, the end portions of the two adjacent protective cases are clamped by the clamping structure.

As a further improvement of the technical scheme, the clamping structure comprises a first clamping part and a second clamping part which are matched and clamped, and the first clamping part and the second clamping part are respectively arranged at two ends of the protective shell.

As a further improvement of the above technical solution, the housing includes a main body and a mounting cover, the main body is provided with a filling protection slot, and the mounting cover is clamped in a notch of the filling protection slot.

As a further improvement of the technical scheme, one end of the shell, which is in the same direction as the end of the hydrogen transmission flexible pipeline, is provided with a connecting flange.

As a further improvement of the technical scheme, the contact surface of the shell and the hydrogen transmission flexible pipeline is provided with viscose.

The invention also provides a hydrogen-conveying flexible pipeline butt joint structure, which adopts the optical fiber protection device according to any one of the above, and comprises the following components:

the end parts of the two hydrogen-conveying flexible pipelines are respectively provided with an optical fiber protection device, and the two optical fiber protection devices are in butt joint and fixed;

and the two ends of the connecting optical fibers are respectively connected with the optical fiber jumper connectors of the two optical fiber protection devices.

The invention also provides a butt joint method of the hydrogen transmission flexible pipeline, which adopts the butt joint structure of the hydrogen transmission flexible pipeline, and comprises the following steps:

fixing an optical fiber protection device at the end part of the hydrogen transmission flexible pipeline;

coaxially connecting and fixing the optical fiber protection devices of the two hydrogen transmission flexible pipelines;

and connecting the two ends of the connecting optical fiber with optical fiber jumper connectors of optical fiber protection devices of two hydrogen-transmitting flexible pipelines to form a complete optical fiber passage.

Drawings

The invention is further described below with reference to the drawings and examples;

FIG. 1 is a schematic diagram of a fiber optic protector and tubing for a hydrogen delivery flexible tubing;

FIG. 2 is a schematic view of the overall structure of an optical fiber protection device for a hydrogen delivery flexible pipeline;

FIG. 3 is a schematic view of a butt joint structure of a hydrogen-transporting flexible pipeline;

fig. 4 is a flow chart of a method of interfacing hydrogen delivery flexible tubing.

Reference numerals:

The optical fiber connector comprises a housing 100, a main body 110, a penetrating groove 111, a connecting boss 112, a connecting groove 113, a mounting cover 120, an optical fiber jumper connector 200, an elastic buffer member 300, a hydrogen-transporting flexible pipe 400, a connecting flange 500 and a connecting optical fiber 600.

Detailed Description

Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present invention, but not to limit the scope of the present invention.

In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, 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 should not be construed as limiting the present invention.

In the description of the present invention, if there is a word description such as "a plurality" or the like, the meaning of a plurality is one or more, and the meaning of a plurality is two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number.

In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

The hydrogen-transporting flexible pipeline 400 is a core tie for hydrogen energy storage and transportation, and is subjected to high-pressure hydrogen, hydrogen embrittlement and dynamic deformation for a long time, and the risks of cracks and leakage are prominent. The optical fiber monitoring can accurately early warn structural failure by virtue of the advantages of distributed sensing, electromagnetic interference resistance and real-time capture of temperature/strain/hydrogen concentration, makes up for a monitoring blind area of the traditional method in a dynamic and high-pressure environment, and is a key technical support for guaranteeing safe and efficient operation of a hydrogen energy industrial chain. However, the fiber lead-out end of the conventional flexible hydrogen-transporting pipe 400 has no good fixing device, and is easy to be lost in dynamic deformation of the flexible hydrogen-transporting pipe 400, such as bending, stretching and photo-aging, so that the fiber is worn and the detection is invalid.

The hydrogen-transporting flexible pipeline 400 is a core tie for hydrogen energy storage and transportation, and is subjected to high-pressure hydrogen, hydrogen embrittlement and dynamic deformation for a long time, and the risks of cracks and leakage are prominent. The optical fiber monitoring can accurately early warn structural failure by virtue of the advantages of distributed sensing, electromagnetic interference resistance and real-time capture of temperature/strain/hydrogen concentration, makes up for a monitoring blind area of the traditional method in a dynamic and high-pressure environment, and is a key technical support for guaranteeing safe and efficient operation of a hydrogen energy industrial chain. However, the fiber lead-out end of the conventional flexible hydrogen-transporting pipe 400 has no good fixing device, and is easy to be lost in dynamic deformation of the flexible hydrogen-transporting pipe 400, such as bending, stretching and photo-aging, so that the fiber is worn and the detection is invalid. Accordingly, referring to fig. 1 to 4, the present invention provides a hydrogen delivery flexible pipe optical fiber protection device and an installation method thereof, and makes the following embodiments:

The utility model provides a flexible pipeline optical fiber protection device of hydrogen transfer, includes casing 100, and casing 100 includes two protective housing, and every protective housing is the crooked extension setting of arc, and two protective housing can assemble into the ring to form the parcel to flexible pipeline 400 of hydrogen transfer, annular structure detachably cover is established at the tip of flexible pipeline 400 of hydrogen transfer, and its inside wall is direct with the periphery contact of flexible pipeline 400 of hydrogen transfer. The casing 100 has a plurality of optical fiber jumper connectors 200 circumferentially distributed, and the casing 100 is inside to be equipped with and fills the protection chamber, and the lateral wall that fills the protection chamber is equipped with the groove 111 that penetrates that supplies optic fibre to penetrate, fills the protection chamber and fills has elastic buffer member 300, and elastic buffer member 300 is equipped with a plurality of threading passageways of connecting between optical fiber jumper connector 200 and penetrating groove 111, and a plurality of optical fiber jumper connectors 200 are used for being connected with the tip of a plurality of optic fibres. The shell 100 comprises a main body 110 and a mounting cover 120, wherein a filling protection groove is formed in the main body 110, the mounting cover 120 is clamped to a notch of the filling protection groove, and the mounting cover 120 covers the notch of the filling protection groove to form a filling protection cavity. The split structure is arranged to facilitate the optical fiber connection.

During installation, all outgoing optical fibers in the hydrogen transmission flexible pipeline 400 are connected with the optical fiber jumper connector 200 through the penetrating groove 111 and the threading channel, the two protective shells are spliced into a circular ring shape, meanwhile, the clamping sleeve is fixed at the end part of the hydrogen transmission flexible pipeline 400, finally, the optical fibers of the hydrogen transmission flexible pipeline 400 are adjusted to be embedded into the groove, the opening of the main body 110 is covered by the cover plate to form a closed whole, the optical fiber jumper connector 200 on the optical fiber protection device of the hydrogen transmission flexible pipeline 400 can be directly connected with a demodulator to demodulate optical fiber information in the hydrogen transmission flexible pipeline 400, and at the connecting part of the pipeline, the optical fibers in different hydrogen transmission flexible pipelines 400 can be connected through the optical fibers, so that a path is formed by detecting optical fibers on the same hydrogen transmission flexible pipeline 400, and the monitoring efficiency of the circuit of the hydrogen transmission flexible pipeline 400 is greatly improved while the cost is reduced. The present application can protect the optical fiber and improve the optical fiber connection efficiency, wherein the optical fiber can be directly connected to the demodulator through the optical fiber jumper connector 200 to demodulate the optical fiber information in the hydrogen-transmitting flexible pipe 400.

In this embodiment, the housing 100 is composed of two protective cases, which are included at the end of the hydrogen delivery flexible pipe 400, and can play a role in fixation. For fixing more firmly, the inside wall of the protective housing is provided with adhesive, the inside wall of the protective housing and the peripheral wall of the hydrogen delivery flexible pipeline 400 are further fixed through the adhesive, and the protective housing and the hydrogen delivery flexible pipeline 400 are prevented from rotating along. In other embodiments, the housing 100 is also formed of multiple protective shells that are sequentially connected in a ring-shaped structure, or is integrally formed with one protective shell.

Specifically, the ends of two adjacent protective shells are clamped through a clamping structure. The clamping structure comprises a first clamping part and a second clamping part which are matched and clamped, and the first clamping part and the second clamping part are respectively arranged at two ends of the protective shell. The first joint portion is the connection recess 113, and the connection recess 113 link up the protective housing along the axial, and the second joint portion is connection boss 112, and when the installation, two protective housing axial dislocation, connection recess 113 and connection boss 112 aim at pressing the coincidence, realize connecting fixedly, form annular structure.

Since the cross section of the flexible hydrogen transfer conduit 400 is generally circular, the housing 100 is also circular, and in other embodiments, the cross section of the flexible hydrogen transfer conduit 400 may vary accordingly, e.g., the cross section of the flexible hydrogen transfer conduit 400 is elliptical, and the housing 100 is also elliptical. Meanwhile, the diameter of the inner wall of the shell 100 is required to be consistent with the outer diameter of the hydrogen-conveying flexible pipeline 400, so that the shells 100 on two sides can tightly wrap the hydrogen-conveying flexible pipeline 400, the thickness of the shell 100 is determined according to application scenes, the size of the application pipeline and the cost, and the thickness of the optical fiber protection device of the hydrogen-conveying flexible pipeline 400 is about 5% of the diameter of the application pipeline.

Further, materials for fabricating the optical fiber protection device of the hydrogen transfer flexible pipe 400 need to have good mechanical properties, wear resistance and weather resistance, including, but not limited to, polypropylene (PP), high Density Polyethylene (HDPE), polytetrafluoroethylene (PTFE), nylon (PA), polyvinyl chloride (PVC), polyetheretherketone (PEEK), acrylonitrile-butadiene-styrene copolymer (ABS), polyester (PET and PBT), and fibers and other reinforced composites thereof;

The elastic cushioning member 300 comprises a cushioning foam having superior elasticity and high and low temperature resistance, including, but not limited to, polyurethane foam PU, ethylene-vinyl acetate copolymer foam EVA, polystyrene foam PS, polyvinyl chloride foam PVC, polyethylene foam PE and polypropylene foam PP, modified polyolefin foam POE, and the like. The elastic buffer member 300 may have various structures, for example, the elastic buffer member 300 includes a first foam body and a second foam body, the first foam body and the second foam body are both annular and can be just plugged into the housing 100, the first foam body and the second foam body are overlapped, and the first foam body is provided with a plurality of grooves to provide routing guidance and buffer protection for the optical fibers of the hydrogen delivery flexible pipeline 400. The optical fiber can pass through the groove, the wire arrangement groove can be further arranged, the optical fiber with surplus fixing columns is arranged in the wire arrangement groove, the optical fiber can be wound in the fixing groove, the second foam body can be stacked on the first foam body and is plugged into the main body 110 after wiring and fixing wiring are completed, and finally the optical fiber is covered by the cover plate. In other embodiments, the elastic buffer member 300 includes a third foam body and a plurality of foam pellets, the third foam body is provided with a plurality of grooves, the optical fibers can pass through the grooves, a wire arrangement groove can be further provided, the optical fibers with surplus fixing columns are arranged in the wire arrangement groove, the optical fibers can be wound in the fixing groove, the foam pellets can be plugged into the main body 110 after the wiring and the fixing wiring are completed, and finally the cover plate is used for covering.

Further, the end face of the annular structure is provided with a connecting flange 500, and both protecting shells are connected with the connecting flange 500. The assembled annular structure is fixedly connected with the connecting flange 500, and can be in threaded connection, or glue connection, or clamping connection, or the combination of glue and clamping connection is used for connecting the two protective shells, so that the effect of further fixing the two protective shells can be achieved. The flanges of the two hydrogen delivery flexible pipe optical fiber protection devices may be connected to each other by screws, and then the two hydrogen delivery flexible pipes 400 optical fibers are connected by the optical fiber jumper connector 200 to form a complete optical fiber path.

It should be noted that, the number, positions and sizes of the penetrating grooves 111 on the inner wall of the housing 100 may be designed according to the optical fiber leading-out position of the actual hydrogen-transporting flexible pipeline 400, and the strength and the optical fiber routing of the optical fiber protecting device of the hydrogen-transporting flexible pipeline 400 are comprehensively considered, the number of penetrating grooves 111 should not be more than three, the penetrating grooves 111 should not be disposed at the connecting grooves 113 and the connecting bosses 112, and the length of the penetrating grooves 111 should be less than 10% of the inner wall of the protecting device. The type of optical fiber and the number of gratings protected by the optical fiber protection device of the hydrogen delivery flexible pipe 400 are not limited, and the type of optical fiber may be a temperature sensor, a strain sensor, a hydrogen concentration sensor, and any combination thereof.

Referring to fig. 3, the present invention further provides a docking structure of a hydrogen-transporting flexible pipeline, which adopts the optical fiber protection device according to any one of the above-mentioned aspects, and the docking structure of the hydrogen-transporting flexible pipeline comprises two hydrogen-transporting flexible pipelines 400, wherein the end parts of the two hydrogen-transporting flexible pipelines are respectively provided with the optical fiber protection devices, the two optical fiber protection devices are fixedly docked with each other in the axial direction, in this embodiment, the optical fiber protection devices are provided with connecting flanges 500, the two connecting flanges 500 are connected through bolts/studs, and a plurality of connecting optical fibers 600, and two ends of the connecting optical fibers 600 are respectively connected with the optical fiber jumper connectors 200 of the two optical fiber protection devices to form a complete optical fiber path. In other embodiments, the end of the housing 100, which is in the same direction as the end of the hydrogen-transporting flexible pipe, is provided with a guide groove and a guide block that are axially arranged, and the guide grooves and the guide blocks of the two housings 100 can be mutually inserted and fixed, so that the two housings 100 are prevented from rotating axially, and the fixation is firmer.

Referring to fig. 4, the present invention further provides an embodiment of a method for installing a hydrogen delivery flexible pipe optical fiber protection device, where the installation method is applied to any one of the foregoing hydrogen delivery flexible pipe optical fiber protection devices, and the method includes:

Step S100, fixing an optical fiber protection device at the end part of the hydrogen transmission flexible pipeline 400;

Step 200, coaxially connecting and fixing the optical fiber protection devices of the two hydrogen transmission flexible pipelines 400;

and step 300, connecting two ends of the connecting optical fiber 600 with optical fiber jumper connectors of optical fiber protection devices of the two hydrogen-transmitting flexible pipelines 400 to form a complete optical fiber path.

In step S100, the optical fiber is first inserted into the main body 110 through the insertion slot 111 and then connected to the optical fiber jumper connector 200 disposed on the main body 110, the housing 100 is fixed at the end of the hydrogen delivery flexible pipe 400 according to the structural form of the housing 100, for example, when the housing 100 is in a ring shape, the housing is directly sleeved at the end of the hydrogen delivery flexible pipe 400, when the housing is composed of two protective shells, the two protective shells are assembled and fastened at the end of the hydrogen delivery flexible pipe 400 at the same time, for the purpose of fixing more firmly, the adhesive is disposed on the inner side wall of the protective shell, for the purpose of connecting the optical fiber 600, the length of the optical fiber cannot be straightened, the optical fiber part which is not straightened can be adjusted to be embedded into the groove, and the cover plate is covered on the opening of the main body 110 to complete the closed whole, so as to achieve the purpose of protecting the optical fiber of the hydrogen delivery flexible pipe 400.

In step S200, two connection flanges 500 of two optical fiber protection devices are fixed by bolt/stud connection, so as to realize two hydrogen-transporting flexible pipelines 400.

The installation method can connect the optical fibers of the two hydrogen-conveying flexible pipelines 400 quickly to form a complete optical fiber passage, and the optical fiber protection device strengthens and fixes the connection part, so that the connection and the fixation are firmer and are not easy to break.

While the preferred embodiments of the present application have been illustrated and described, the present application is not limited to the examples, and various equivalent modifications and substitutions can be made by one skilled in the art without departing from the spirit of the present application, and these equivalent modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.

Claims (10)

1. The utility model provides an optical fiber protection device suitable for flexible pipeline of hydrogen transfer, its characterized in that, including being annular casing, the casing be used for detachably suit in the periphery of the tip of flexible pipeline of hydrogen transfer, the casing distributes along circumference has a plurality of optical fiber jumper wire to connect, the inside protection chamber that fills that is equipped with of casing, the lateral wall that fills the protection chamber is equipped with the groove of penetrating that supplies the optic fibre to penetrate, it has elastic buffer member to fill the protection chamber, elastic buffer member be equipped with connect in optical fiber jumper wire connect with penetrate a plurality of threading passageways between the groove, a plurality of optical fiber jumper wire connect be used for with the end connection of a plurality of optic fibers.

2. The optical fiber protection device according to claim 1, wherein:

the resilient cushioning member includes a cushioning foam.

3. The optical fiber protection device according to claim 1, wherein:

the shell comprises a plurality of protective shells, and the plurality of protective shells are detachably connected along the circumferential direction.

4. The optical fiber protection device according to claim 2, wherein:

the ends of the two adjacent protective shells are clamped by the clamping structures.

5. The optical fiber protection device according to claim 4, wherein:

The clamping structure comprises a first clamping part and a second clamping part which are matched and clamped, and the first clamping part and the second clamping part are respectively arranged at two ends of the protective shell.

6. The optical fiber protection device according to claim 1, wherein:

The shell comprises a main body and a mounting cover, wherein a filling protection groove is formed in the main body, and the mounting cover is clamped to the notch of the filling protection groove.

7. A fiber optic protection device according to claim 3, wherein:

And a connecting flange is arranged at one end of the shell, which is in the same direction as the end of the hydrogen transmission flexible pipeline.

8. The optical fiber protection device according to claim 1, wherein:

and the contact surface of the shell and the hydrogen transmission flexible pipeline is provided with adhesive.

9. A hydrogen transfer flexible pipe butt joint structure, characterized in that an optical fiber protection device according to any one of claims 1 to 8 is employed, comprising:

the end parts of the two hydrogen-conveying flexible pipelines are respectively provided with an optical fiber protection device, and the two optical fiber protection devices are in butt joint and fixed;

and the two ends of the connecting optical fibers are respectively connected with the optical fiber jumper connectors of the two optical fiber protection devices.

10. A method for butt-jointing hydrogen-conveying flexible pipelines, which is characterized in that the butt-jointing structure of the hydrogen-conveying flexible pipelines according to claim 9 is adopted, and the butt-jointing method comprises the following steps:

fixing an optical fiber protection device at the end part of the hydrogen transmission flexible pipeline;

coaxially connecting and fixing the optical fiber protection devices of the two hydrogen transmission flexible pipelines;

and connecting the two ends of the connecting optical fiber with optical fiber jumper connectors of optical fiber protection devices of two hydrogen-transmitting flexible pipelines to form a complete optical fiber passage.