CN-121999672-A - Fixed non-contact counterweight system and submarine pipeline experimental model

CN121999672ACN 121999672 ACN121999672 ACN 121999672ACN-121999672-A

Abstract

The invention relates to the field of submarine pipeline simulation experiments, in particular to a fixed non-contact type counterweight system and a submarine pipeline experiment model, and aims to solve the technical problem that a related counterweight mode is not applicable to submarine pipeline model experiments. The fixed non-contact counterweight system comprises a supporting piece, wherein the supporting piece is in a strip shape and is used for being arranged in a model pipeline to be connected between two ends of the model pipeline, and a plurality of counterweights are uniformly arranged on the supporting piece at intervals along the length direction of the supporting piece and have a gap with the inner wall of the model pipeline under the counterweight working condition. The fixed non-contact type counterweight system ensures that the gravity of the unit length of the model pipeline is similar to that of the prototype pipeline, in addition, the counterweight mode is stable in structure, the counterweight block cannot deviate and rotate in work and cannot contact with the pipe wall, and meanwhile, the counterweight block is uniformly distributed in the pipe, so that the stress concentration on the pipeline can be effectively avoided, and the bending rigidity of the model pipeline is ensured to be similar to that of the prototype pipeline.

Inventors

YAN SHUMING
YANG CHUANCHUAN
Peng Qihao
JIN HUI
LIANG KAI
ZHAO YUNHE
DU WEINA
LIU TIAN
Dong Juncan
LI QINAN
KANG YOUWEI

Assignees

中国石油天然气管道工程有限公司
中国石油天然气集团有限公司
中国石油管道局工程有限公司

Dates

Publication Date: 20260508
Application Date: 20241108

Claims (10)

1.A fixed non-contact counterweight system, comprising: The support piece (1) is long and is used for being arranged in the model pipeline (2) so as to be connected between two ends of the model pipeline (2); the balancing weights (3) are arranged along the length direction of the supporting piece (1), the balancing weights (3) are evenly arranged on the supporting piece (1) at intervals, and the balancing weights (3) and the inner wall of the model pipeline (2) are provided with gaps under the working condition of balancing weights.
2. The fixed non-contact counterweight system of claim 1, wherein the fixed non-contact counterweight system is configured to move, The fixed non-contact counterweight system further comprises a limiting piece (4), wherein the limiting piece (4) is fixed on the supporting piece (1) so as to limit the counterweight (3) to move in the length direction of the supporting piece (1); The limiting piece (4) has a gap with the inner wall of the model pipeline (2) under the working condition of counterweight.
3. The fixed non-contact counterweight system of claim 2, wherein the fixed non-contact counterweight system is configured to move, The balancing weight (3) is spherical and provided with a through hole penetrating through the balancing weight and passing through the center of the balancing weight, and the balancing weight (3) is sleeved on the supporting piece (1) through the through hole.
4. A fixed non-contact counterweight system according to claim 3, wherein, The limiting piece (4) comprises a steel slice which is clamped on the supporting piece (1); each balancing weight (3) is clamped between two steel slices.
5. The fixed non-contact counterweight system of claim 4, wherein the fixed non-contact counterweight system is configured to move, The gravity center of the steel slice is higher than that of the balancing weight (3).
6. The fixed non-contact counterweight system of claim 1, wherein the fixed non-contact counterweight system is configured to move, The supporting piece (1) adopts a steel wire rope.
7. The fixed non-contact counterweight system of claim 6, wherein the fixed non-contact counterweight system is configured to move, The fixed non-contact counterweight system further comprises a rigging for placement at a port of the model conduit (2); the end of the steel wire rope is connected with the rigging.
8. The fixed non-contact counterweight system of claim 7, wherein the fixed non-contact counterweight system is configured to move, The rigging comprises a wedge joint (5), the wedge joint (5) comprises a wedge sleeve (51) and a wedge block (52), and the steel wire rope is clamped between the wedge sleeve (51) and the wedge block (52).
9. Submarine pipeline experimental model, characterized by comprising a model pipeline (2) and a fixed non-contact counterweight system according to any of claims 1 to 8; The fixed non-contact counterweight system is arranged in the model pipeline (2).
10. The submarine pipeline according to claim 9, wherein, The submarine pipeline experimental model further comprises a baffle (6), wherein the baffle (6) is connected with the model pipeline (2) and seals the port of the model pipeline (2); the rigging of the fixed non-contact counterweight system is connected to the baffle (6).

Description

Fixed non-contact counterweight system and submarine pipeline experimental model Technical Field The invention relates to the field of submarine pipeline simulation experiments, in particular to a fixed non-contact counterweight system and a submarine pipeline experimental model. Background Submarine pipeline is a pipeline for continuously conveying a large amount of oil and gas on the seabed in a closed mode, and is a main component of an offshore oil and gas field development and production system. For offshore oil and gas transportation, pipeline transportation is the fastest, safest and economically reliable mode, but due to the limitation of the working environment of submarine pipelines, the research of the pipeline transportation is often carried out by a model experiment mode. In submarine pipeline model experiments, the model pipeline is similar to a prototype in shape, and more importantly, the model pipeline can embody the physical essence of the original phenomenon. However, compared with the solid pipeline, the external dimension of the model pipeline is similar to the external dimension of the model pipeline in proportion, but the weight of the model pipeline cannot be reduced according to the proportion, and free adjustment is difficult to realize. In order to make the model pipe and the prototype pipe satisfy gravity similarity per unit length, a weight structure is generally installed on the model pipe. At present, common weight balancing modes of the model pipeline mainly comprise balance pressing bags, weight balancing layers, weight box filling, liquid filling and the like. The balance bag pressing method generally takes a prefabricated balance bag as a carrier, fills materials with smaller particles into the balance bag, and then hangs the balance bag on a model pipeline. The method is mainly installed on the pipe wall, is connected into a carrier through hoops, stirrups and stress bars, and is used for pouring concrete or other filling materials into the carrier to form a counterweight layer structure. The method for filling the weight box mainly realizes the weight of the model pipeline by installing the weight box with adjustable weight and mass center, has complex design and large whole volume, is mainly used for mechanical model experiments, and is difficult for related systems to meet the requirements of hydraulic experiments. The liquid filling method mainly performs weight balancing by injecting liquid into a pipeline, the method achieves the expected weight balancing by adjusting the density and the volume of the injected liquid, the operability is low, and the weight balancing liquid can deposit on the bottom of the pipeline due to the gravity effect to cause uneven weight balancing and stress concentration, so that the influence on the pipeline wall, particularly the bottom wall of the pipeline is not negligible. Disclosure of Invention The invention aims to provide a fixed non-contact type counterweight system and a submarine pipeline experimental model, so as to solve the technical problem that a related counterweight mode is not applicable to submarine pipeline model experiments. In order to solve the technical problems, the technical scheme provided by the invention is as follows: In a first aspect, the invention provides a fixed non-contact counterweight system, comprising a support member, a counterweight device and a counterweight device, wherein the support member is in a strip shape and is used for being arranged in a model pipeline so as to be connected between two ends of the model pipeline; The balancing weights are arranged in the supporting piece at intervals in a uniform manner along the length direction of the supporting piece, and have gaps with the inner wall of the model pipeline under the working condition of balancing weights. Further, the fixed non-contact counterweight system further comprises a limiting piece, wherein the limiting piece is fixed on the supporting piece so as to limit the counterweight to move in the length direction of the supporting piece; and the limiting piece has a gap with the inner wall of the model pipeline under the working condition of counterweight. Further, the balancing weight is spherical and provided with a through hole penetrating through the balancing weight and passing through the center of the balancing weight, and the balancing weight is sleeved on the supporting piece through the through hole. Further, the limiting piece comprises a steel slice, and the steel slice is clamped on the supporting piece; Each balancing weight is clamped between two steel slices. Further, the gravity center of the steel slice is higher than that of the balancing weight. Further, the supporting piece adopts a steel wire rope. Further, the fixed non-contact counterweight system further comprises a rigging for placement at a port of the model conduit; the end of the steel wire rope is connected with the rigging. Further, the rigging include