CN213177131U

CN213177131U - Material conveying pipeline

Info

Publication number: CN213177131U
Application number: CN202021914886.8U
Authority: CN
Inventors: 付玲; 刘延斌; 郭伦文; 李飞; 蒋凯歌; 文杰
Original assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Current assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date: 2020-09-04
Filing date: 2020-09-04
Publication date: 2021-05-11
Anticipated expiration: 2030-09-04

Abstract

An embodiment of the utility model provides a material conveying pipeline belongs to engineering technical field. The material conveying pipeline comprises: the optical fiber sensor comprises an inner tube, an optical fiber with a grating sensor and a first material layer, wherein the optical fiber is wound between the outer surface of the inner tube and the first material layer at a preset winding angle, and the number of the grating sensors on a single optical fiber and the distance between the adjacent grating sensors are obtained according to the outer diameter of the inner tube, the preset winding angle of the optical fiber and the length of the inner tube. The material conveying pipeline can guarantee long service life and high stability of stress detection.

Description

Material conveying pipeline

Technical Field

The utility model relates to an engineering technical field specifically relates to a material conveying pipeline.

Background

The material conveying pipeline, such as a concrete conveying pipeline, is a key part of a concrete pumping machine such as a pump truck, a trailer pump and a vehicle-mounted pump, and in the using process, the fluid state in the pumping pipeline and the state of the pipeline are very critical to the efficient and safe use of pumping equipment. At present, the stress detection of the material conveying pipeline mostly uses the resistance strain gauge attached to the surface of the pipeline, and the service life and the stability are insufficient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a material conveying pipeline, this material conveying pipeline can guarantee that the longe-lived and the stability of detecting stress is high.

In order to achieve the above object, an embodiment of the present invention provides a material conveying pipeline, which includes: the optical fiber sensor comprises an inner tube, an optical fiber with a grating sensor and a first material layer, wherein the optical fiber is wound between the outer surface of the inner tube and the first material layer at a preset winding angle, and the number of the grating sensors on a single optical fiber and the distance between the adjacent grating sensors are obtained according to the outer diameter of the inner tube, the preset winding angle of the optical fiber and the length of the inner tube.

Preferably, the winding angle of the optical fiber is 63.4 °.

Preferably, the inner tube is made of metal, ceramic or polymer material.

Preferably, the first material layer is made of a single layer of composite material or of multiple layers of different composite materials.

Preferably, the material conveying line further comprises: and the flange is sleeved on a part of the outer surface of the first material layer.

Preferably, the flange has a flange at one end, and serrations or grooves are formed on inner and outer surfaces of the other end, with a predetermined interval between adjacent serrations or adjacent grooves.

Preferably, the serrations or the grooves are closed-loop or thread-like.

Preferably, the material conveying line further comprises: and the second material layer covers the outer surface of the flange and the outer surface of the first material layer.

Preferably, the second material layer is made of glass fibers.

Preferably, any interface of the optical fiber is connected with a modem, and the modem is used for reading the circumferential stress of the position to be calculated of the inner tube detected by the optical fiber sensor.

Through above-mentioned technical scheme, this material conveying line includes: the optical fiber sensor comprises an inner tube, an optical fiber with a grating sensor and a first material layer, wherein the optical fiber is wound between the outer surface of the inner tube and the first material layer at a preset winding angle, and the number of the grating sensors on a single optical fiber and the distance between the adjacent grating sensors are obtained according to the outer diameter of the inner tube, the preset winding angle of the optical fiber and the length of the inner tube. According to the material conveying pipeline, the optical fiber is wound and embedded between the first material layer and the inner pipe, the optical fiber is not easy to loosen and fall off, the service life of stress detection is long, and the stability is high.

Other features and advantages of embodiments of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention, but do not constitute a limitation of the embodiments of the invention. In the drawings:

fig. 1 is a schematic view of a material conveying pipeline according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the relationship between wall stress and damage depth provided by an embodiment of the present invention;

fig. 3 is a schematic view of a material conveying pipeline according to another embodiment of the present invention;

fig. 4 is a schematic view of a flange according to an embodiment of the present invention.

Description of the reference numerals

1 inner tube 2 optical fiber

3 first material layer 4 second material layer

5 flange 6 wear-resisting sleeve

Detailed Description

The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It is to be understood that the description herein is only intended to illustrate and explain embodiments of the present invention, and is not intended to limit embodiments of the present invention.

Fig. 1 is a schematic view of a material conveying pipeline according to an embodiment of the present invention. As shown in fig. 1, the material conveying line includes: the optical fiber grating sensor comprises an inner tube 1, an optical fiber 2 with a grating sensor and a first material layer 3, wherein the optical fiber 2 is wound between the outer surface of the inner tube 1 and the first material layer 3 at a preset winding angle, and the number of the grating sensors on a single optical fiber 2 and the distance between the adjacent grating sensors are obtained according to the outer diameter of the inner tube 1, the preset winding angle of the optical fiber 2 and the length of the inner tube 1.

Specifically, the utility model discloses the material conveying line is preferred to be used for carrying the concrete. The inner tube 1 may be made of metal, ceramic or polymer material. For example, the alloy may be prepared by quenching a wear-resistant low alloy steel, sand blasting the outer surface, and then cleaning with acetone or other organic cleaning agents. The optical fiber 2 having the grating sensor is wound around the outer surface of the inner tube 1 by, for example, fixing the inner tube 1 to a rotating shaft of a winding machine and winding the optical fiber 2 by rotation of the winding shaft. In which the optical fiber 2 is wound at a specific angle that can measure stress variation in the reaction hoop direction and the axial direction, preferably, the preset winding angle of the optical fiber 2 is 63.4 ° (as shown in fig. 1, the optical fiber 2 indicated by a dotted line is the optical fiber 2 at the back of the inner tube 1, and the winding angle is an angle between the optical fiber 2 indicated by a solid line and the optical fiber 2 indicated by a dotted line). After the optical fiber 2 is wound, the interfaces of the optical fiber 2 are fixed at two ends of the inner tube 1, and either end can be connected with a reading device of a sensor, such as a modem. The modem can be used to read the hoop stress of the inner pipe 1 at the position to be calculated, as detected by the fiber optic sensor. Optical fiber 2 is pre-buried in combined material, compares in the resistance foil gage of attached in surface, long service life, and stability is high to, to the atress characteristics of pipeline, optical fiber 2 adopts the predetermined winding angle that can react axial, hoop stress, adopts the stress of two directions of 1 grating sensor simultaneous analysis axial and hoop.

The inner tube 1 is preferably wound with an optical fiber 2, on which optical fiber 2 the number of grating sensors and the distance between them are also required. Wherein the content of the first and second substances,

the distance between adjacent grating sensors can be obtained by the following formula:

wherein D is the distance between the adjacent grating sensors, D is the outer diameter of the inner tube 1, and α is the preset winding angle of the optical fiber 2.

The number of grating sensors on a single fiber 2 can be obtained by the following formula:

wherein n is the number of grating sensors on the single optical fiber 2, D is the outer diameter of the inner tube 1, α is the preset winding angle of the optical fiber 2, and L is the length of the inner tube 1.

The first material layer 3 may be made of a single-layer composite material (e.g., a carbon fiber composite material) or a plurality of layers of different composite materials, and preferably, the first material layer 3 is prepared by winding a carbon fiber composite material with high strength, for example, a carbon fiber impregnated with glue is wound around the outer surface of the inner tube 1 in a circumferential direction, a certain pre-stress is applied during the winding process, and the carbon fiber composite material layer is set to a specific thickness, which can share enough stress to ensure the safety of the lining when the lining is worn, and the cost factor is considered and controlled within a proper range.

Because the stress state of the pipe wall of the inner pipe 1 is related to factors such as pumping internal pressure, lining thickness, fiber type, fiber thickness, abrasion depth and the like, the stress level of the pipe wall of the inner pipe 1 is obviously reduced due to the stress sharing effect of the fiber layer in the composite pipeline made by reinforcing the fiber composite material by hoop winding, and the results before and after the reinforcement are shown in fig. 2.

Fig. 3 is a schematic view of a material conveying pipeline according to another embodiment of the present invention. As shown in fig. 3, the material conveying pipeline further includes: the material comprises a second material layer 4 and a flange 5, wherein the flange 5 is sleeved on one part of the outer surface of the first material layer 3, and the second material layer 4 covers the outer surface of the flange 5 and the outer surface of the first material layer 3.

Specifically, the flange 5 is sleeved on the outer surface of the first material layer 3, the first material layer 3 is tightly bonded with the inner surface of the flange 5, the bonding length needs to meet the requirement of axial load, and the wear-resistant sleeve 6 is arranged at the other end of the flange 5. The second material layer 4 may be an explosion-proof fiber composite layer, preferably made of a glass fiber layer, and the impregnated glass fiber is annularly wound on the outer surfaces of the inner pipe 1 and the flange 5, so as to supplement the inner layer fiber and provide impact and knock protection from the outside. Compared with the second steel material layer 4, the second material layer is made of light high-strength fiber materials, so that the weight can be effectively reduced by 20-40%.

Preferably, the flange 5 is formed by turning or integral casting, and has a flange at one end and a serration or groove formed by turning or casting on the inner and outer surfaces at the other end, and the serration or groove is formed in a closed ring shape or in a screw thread shape with a certain interval therebetween, as shown in fig. 4. The inner surface and the outer surface of the flange 5 are bonded with the fiber layer (the first material layer 3 or the second material layer 4), and grooves or saw teeth are formed in the surfaces, so that the connection strength of the flange 5 is improved.

When the first material layer 3 adopts carbon fibers for applying prestress, and the second material layer 4 adopts glass fibers, the carbon fibers bear main circumferential stress, the high-strength high-modulus characteristics of the carbon fibers are fully exerted, and the glass fibers bear partial internal pressure and all external impact on the second material layer 4, so that the structural rigidity is improved. The characteristics of the two materials are fully utilized, and the material cost can be reduced.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A material transfer line, comprising:

an inner tube, an optical fiber with a grating sensor, and a first material layer, wherein,

the optical fibers are wound between the outer surface of the inner tube and the first material layer at a preset winding angle, and the number of grating sensors on a single optical fiber and the distance between adjacent grating sensors are obtained according to the outer diameter of the inner tube, the preset winding angle of the optical fibers and the length of the inner tube.

2. The material conveying pipeline according to claim 1, wherein the winding angle of the optical fiber is 63.4 °.

3. The material transfer pipeline of claim 1, wherein the inner pipe is made of metal, ceramic, or polymer material.

4. The material transfer pipeline of claim 1, wherein the first material layer is made of a single layer of composite material or multiple layers of different composite materials.

5. The material transfer line of claim 1, further comprising:

and the flange is sleeved on a part of the outer surface of the first material layer.

6. The material conveying pipeline according to claim 5, wherein the flange has a flange at one end, and serrations or grooves are formed on inner and outer surfaces of the other end, and a predetermined interval is formed between adjacent serrations or adjacent grooves.

7. The material conveying pipe according to claim 6, characterized in that the serrations or the grooves are closed-loop or threaded.

8. The material transfer line of claim 5, further comprising:

and the second material layer covers the outer surface of the flange and the outer surface of the first material layer.

9. The material transfer line of claim 8, wherein the second layer of material is made of fiberglass.

10. The material conveying pipeline according to claim 1, characterized in that any interface of the optical fiber is connected with a modem, and the modem is used for reading the circumferential stress of the position to be calculated of the inner pipe detected by the optical fiber sensor.