Long-term sealing pipeline stress reduction device and safety performance detection system

Abstract

The invention discloses a long-term sealing pipeline stress reduction device and a safety performance detection system, and relates to the technical field of pipeline stress reduction. The telescopic structure of the pipeline stress reducing device comprises a short pipe, a sealing sleeve assembly welded with the short pipe into a whole and a telescopic pipe arranged in the short pipe and the sealing sleeve assembly in a penetrating mode, the two ends of the short pipe and the two ends of the telescopic pipe are welded to the pipeline, and the telescopic pipe stretches out and draws back along with thermal expansion and cold contraction of the pipeline so as to reduce the thermal stress of the pipeline and ensure safe operation of the pipeline. The anti-falling clamping ring is welded to the inner end of the telescopic pipe, leakage accidents caused by pipeline separation due to excessive extension of the telescopic pipe are avoided, long-term sealing can be achieved after one-time installation, and maintenance is not needed.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline stress reduction, in particular to a permanent sealed pipeline stress reducer and a safety performance detection system. Background Art

[0002] As pipeline professionals know, the larger the diameter of the pipeline and the higher the temperature of the conveying medium, the greater the pipeline stress. If no stress reduction measures are taken, the pipeline strength will exceed the limit, which will cause pipeline cracking and bursting accidents, with disastrous consequences. Therefore, pipeline stress reducers are needed to reduce stress to ensure the safe operation of the pipeline.

[0003] The existing pipe expansion joints are equipped with multiple mounting flanges and bolts, pressure regulating flanges and adjustment bolts, limit screws and fixed brackets on the outside. They are large in size and expensive to manufacture. The sealing pressure needs to be adjusted according to the wear of the sealing material. In addition, they need to be regularly or frequently inspected and replaced during long-term operation, which requires additional maintenance costs. In the pipeline installation project, it is necessary to cast expensive concrete inspection wells, fix concrete piers, install fixed brackets and sliding brackets. The construction period is long, the cost is high, and the subsequent operation and maintenance costs are high. Due to a variety of uncontrollable factors, pipeline network shutdown accidents due to medium leakage occur from time to time.

[0004] Therefore, in view of this, in order to address the major structural defects of existing products, the inventors have made fundamental improvements and breakthroughs in key technologies such as sealing principles, product structures, sealing materials, manufacturing processes, and assembly processes. The comprehensive cost-effectiveness of the products has been improved by dozens of times. The most critical thing is one-time installation, long-term sealing, and ensuring safety. Therefore, the long-term sealed pipeline stress reducer and safety performance detection system of the present invention are proposed. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a permanent sealed pipeline stress reducer and a safety performance detection system, which solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a long-term sealed pipeline stress reducer, including a short tube and a sealing sleeve assembly, a telescopic tube is passed through the interior of the short tube, an anti-dropping clamp is fixed to the outer wall of one end of the telescopic tube located inside the short tube, the sealing sleeve assembly is fixed to the outer wall of the end of the short tube, the sealing sleeve assembly includes a sealing sleeve, a groove, an O-ring, a bolt, a pressure flange, a self-tightening spring and a pressure regulating ring, a groove is opened inside the sealing sleeve, and an O-ring is embedded in the groove, the end of the sealing sleeve away from the short tube is threadedly connected with a bolt, and pressure regulating rings and self-tightening springs are provided at both ends of the graphite sealing ring.

[0007] Furthermore, the outer diameter of the telescopic tube matches the inner diameter of the short tube end, the outer diameter of the anti-dropping clamp is smaller than the inner diameter of the short tube end, and the outer diameter of the anti-dropping clamp matches the inner diameter of the short tube.

[0008] Furthermore, the inner side surface of the O-ring is in contact with the outer wall of the telescopic tube, and the number of the O-rings is at least three.

[0009] Furthermore, the pressure flange is fixedly connected to the sealing sleeve by bolts, and the pressure flange is sleeved on the outside of the telescopic tube.

[0010] Furthermore, the pressure regulating ring is sleeved and fixed on the outside of the telescopic tube, and the self-tightening spring is distributed in a ring shape on the side of the pressure regulating ring.

[0011] Furthermore, the telescopic tube is elastically connected to the sealing sleeve through a pressure regulating ring, a self-tightening spring, and a pressure flange, and the telescopic tube is slidably connected to the short tube.

[0012] Furthermore, the sealing sleeve assembly also includes a graphite sealing ring, and the pressure regulating ring and the self-tightening spring are arranged in two layers, with a graphite sealing ring arranged in the middle.

[0013] Furthermore, the graphite sealing ring is sleeved on the outer wall of the telescopic tube, and the graphite sealing ring is in a layered and tightly compressed structure.

[0014] Furthermore, the graphite sealing ring is located between the two pressure regulating rings and the self-tightening spring, and the graphite sealing ring is tightly attached to the inclined surface of the inner wall of the sealing sleeve.

[0015] A safety performance detection system, which is applied with the above-mentioned permanent sealed pipeline stress reducer, includes a detector group, and the detector group includes a displacement detector, a stress detector, a temperature collector, a pressure collector, and a monitoring camera. The detector group is remotely connected to a system background via NB wireless communication, and the system background is wirelessly connected to a field alarm. The system background is used to calculate the expansion and contraction amount and the displacement amount based on the parameters collected by the detector group, as well as the pipeline stress calculation, the sealing pressure calculation, the soil pressure and the friction and holding force calculation, and the pipeline safety assessment.

[0016] The present invention provides a permanent sealed pipeline stress reducer and a safety performance detection system, which has the following beneficial effects, which are incomparable to conventional products:

[0017] 1. The long-term sealed pipeline stress reducer eliminates the multiple mounting flanges and bolts, pressure regulating flanges and adjustment bolts, limit screws and fixed brackets on the outside of conventional pipeline expansion joints. The sealing components of the long-term sealed pipeline stress reducer are all set inside, with compact structure, small size, light weight, low cost, multiple composite seals, automatic sealing pressure adjustment, one-time installation, long-term sealing, once and for all, no maintenance, ensuring safety. During installation, conventional inspection wells (small well chambers cost tens of thousands of yuan, large well chambers cost hundreds of thousands of yuan), fixed brackets, guide brackets, limit devices, etc. are eliminated, shortening the construction period, saving hundreds of thousands of yuan in engineering costs per kilometer, and no operation and maintenance costs.

[0018] 2. This long-term sealed pipeline stress reducer has strong adaptability and can be used for media such as oil, gas, hot water, and steam.

[0019] 3. This long-term sealed pipeline stress reducer is resistant to high temperature and high pressure, and safety is the most important. The core sealing technology has been tested by the military industry department, and the physical performance indicators such as material, hardness, roughness, sealing pressure, friction, aging coefficient, and temperature resistance have all met the technical requirements to ensure the performance and safety and reliability of the product. The prototype has been tested with a dynamic pressure of 6.0Mpa (the pressure gauge needle has reached the top and cannot be raised any further), and there is no leakage. Moreover, the dynamic friction and stress are far superior to the pipeline safety stress, ensuring safe operation.

[0020] 4. This long-term sealed pipeline stress reducer has no special requirements for the pipeline diameter, and can be of any size. It is particularly suitable for direct burial of large-diameter pipes, with obvious advantages.

[0021] 5. This long-term sealed pipeline stress reducer has no special requirements for the ambient temperature. Direct burial of pipelines in high-latitude and ultra-cold areas (below -30°C) is a difficult problem in the industry. The use of this pipeline stress reducer can reduce the huge thermal stress caused by the high temperature difference of the pipeline and prevent pipeline rupture accidents caused by excessive stress.

[0022] 6. The permanent sealed pipe stress reducer has no special requirements for the soil type of the pipeline directly buried. Different soil types will cause different expansion and contraction and stress on the pipeline due to pressure, friction, grip force, constraint force, etc. The permanent sealed pipe stress reducer can effectively respond to changes in medium temperature and different soil conditions to ensure that the pipeline stress will not exceed the limit and ensure safe operation.

[0023] 7. The long-term sealed pipeline stress reducer has a sealing material that is resistant to aging, heat, pressure and wear. The product has a service life of up to 20 years, ensuring no leakage, no maintenance, no operating maintenance costs and no labor costs.

[0024] 8. The permanent sealed pipeline stress reducer is equipped with a safety performance detection device, which is very important for long-distance pipelines, large-diameter pipelines, pipelines for transporting special media, high temperature and high pressure and other important pipelines. When the pipeline is directly buried, the short tube and telescopic tube of the permanent sealed pipeline stress reducer are installed with a safety performance detection device. All the detected physical parameters, such as medium temperature and pressure, pipeline surface temperature, ambient temperature, soil temperature and pressure, expansion amount, pipeline stress, etc., are transmitted to the background management system by wireless communication, and the data are statistically calculated and analyzed to make safety and life assessments to ensure the long-term safe operation of the pipeline. There are also cameras to remotely monitor the on-site situation and deal with emergencies in a timely manner. The detailed and reliable big data obtained by the safety performance detection device system can optimize and improve the performance of pipeline stress reducer products. It can fill and improve the scientific theory and direct burial technology of high temperature, high pressure and large diameter direct burial, and solve many problems such as engineering design, construction technology, and safe operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall appearance structure of the permanent sealed pipeline stress reducer of the present invention;

[0026] Figure 2 It is a schematic diagram of the explosion structure of the permanent sealed pipeline stress reducer of the present invention;

[0027] Figure 3 It is a schematic diagram of the sealing sleeve structure of the permanent sealing pipeline stress reducer of the present invention;

[0028] Figure 4 It is a schematic diagram of the short pipe structure of the permanent sealed pipeline stress reducer of the present invention;

[0029] Figure 5 It is a schematic diagram of the overall cross-sectional structure of the permanent sealed pipeline stress reducer of the present invention.

[0030] In the figure: 1, short tube; 2, telescopic tube; 3, anti-dropping clamp; 4, sealing sleeve assembly; 401, sealing sleeve; 402, groove; 403, O-ring; 404, bolt; 405, flange; 406, self-tightening spring; 407, pressure regulating ring; 408, graphite sealing ring or graphite packing. DETAILED DESCRIPTION

[0031] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0032] Example 1

[0033] like Figure 1-Figure 5As shown, the present invention provides a technical solution: a short tube 1 and a sealing sleeve assembly 4, wherein a telescopic tube 2 is inserted into the interior of the short tube 1, and an anti-dropping clamp ring 3 is fixed to the outer wall of one end of the telescopic tube 2 located inside the short tube 1, and the sealing sleeve assembly 4 is fixed to the outer wall of the end of the short tube 1, and the sealing sleeve assembly 4 includes a sealing sleeve 401, a groove 402, an O-ring 403, a bolt 404, a pressure flange 405, a self-tightening spring 406 and a pressure regulating ring 407, and a graphite sealing ring 408. The interior of the sealing sleeve 401 is provided with a The groove 402 is provided with an O-ring 403 embedded in the groove 402. The end of the sealing sleeve 401 away from the short tube 1 is provided with a bolt 404 for fixing the pressure flange. The sealing sleeve 401 is provided with a graphite sealing ring 408, and pressure regulating rings 407 and self-tightening springs 406 are provided at both ends. The outer diameter of the telescopic tube 2 is adapted to the inner diameter of the end of the short tube 1, and the outer diameter of the anti-dropping clamp 3 is smaller than the inner diameter of the end of the short tube 1, and the outer diameter of the anti-dropping clamp 3 is adapted to the inner diameter of the inside of the short tube 1. The O-ring The inner side of the sealing ring 403 is in contact with the outer wall of the telescopic tube 2, and the number of the O-rings 403 is at least three. The pressure flange 405 is fixedly connected to the sealing sleeve 401 through the bolt 404, and the pressure flange 405 is sleeved on the outside of the telescopic tube 2. The pressure regulating ring 407 is sleeved and fixed on the outside of the telescopic tube 2, and the self-tightening spring 406 is distributed in a ring shape on the side of the pressure regulating ring 407. The telescopic tube 2 is elastically connected to the sealing sleeve 401 through the pressure regulating ring 407, the self-tightening spring 406, the pressure flange 405, and the sealing sleeve 401. The expansion tube 2 is connected, and the expansion tube 2 is slidably connected with the short tube 1. The sealing sleeve assembly 4 also includes a graphite sealing ring 408. A graphite sealing ring 408 is arranged on the inner side of the pressure regulating ring 407 away from the self-tightening spring 406. The graphite sealing ring 408 is sleeved on the outer wall of the expansion tube 2, and the graphite sealing ring 408 is in a layered stacked and compressed structure. The graphite sealing ring 408 is located between the two pressure regulating rings 407 and the self-tightening spring 406, and the two ends of the graphite sealing ring 408 are tightly attached to the inclined surface of the inner wall of the sealing sleeve 401.

[0034] The specific operation is as follows: the ends of the short tube 1 and the telescopic tube 2 that are away from each other are welded to the main pipeline. When the medium is transmitted by using the pipeline, the short tube 1 and the telescopic tube 2, the outer diameter of the anti-dropping clamp ring 3 is adapted to the inner diameter of the short tube 1, and the stacked graphite sealing rings 408 and the O-rings 403 are matched to ensure the sealing performance, so as to prevent the medium from leaking during the transmission process;

[0035] When stress is generated due to the high temperature of the transmission medium, the telescopic tube 2 will expand and contract, thereby relieving the stress and avoiding excessive strength of the pipeline. At this time, the anti-dropping clamp ring 3 can prevent the telescopic tube 2 from being excessively extended and detached from the short tube 1. When the telescopic tube 2 expands and contracts, the pressure regulating ring 407 always presses the graphite sealing ring 408 under the pressure of the self-tightening spring 406 to ensure sufficient sealing pressure. The O-ring 403 always slides on its outer wall in disguised form to ensure sealing without hindering the expansion and contraction of the telescopic tube 2.

[0036] Compared with the existing conventional pipe expansion joints, the present invention eliminates the multiple mounting flanges and bolts, pressure regulating flanges and adjustment bolts, limit screws and fixed brackets etc. of the conventional pipe expansion joints. The sealing components of the permanent sealing pipe stress reducer are all arranged inside, with compact structure, small size, light weight, low cost, multiple composite seals, automatic adjustment of sealing pressure, one-time installation, permanent sealing, once and for all, no maintenance, ensuring safety. During installation, conventional inspection wells (small well chambers cost tens of thousands of yuan, large well chambers cost hundreds of thousands of yuan), fixed brackets, guide brackets, limit devices etc. are eliminated, shortening the construction period, saving hundreds of thousands of yuan in engineering cost per kilometer, and no operation and maintenance costs.

[0037] Technical reliability test:

[0038] The prototype has undergone a 6.0Mpa (pressure gauge needle has reached its top and cannot rise any higher) dynamic pressure test and has proven leak-proof. Furthermore, the dynamic friction and stress are far superior to the pipeline safety stress, ensuring safe operation.

[0039] A safety performance detection system, which is applied with the above-mentioned permanent sealed pipeline stress reducer, includes a detector group, which includes a displacement detector, a stress detector, a temperature collector, a pressure collector, and a surveillance camera. The detector group is remotely connected to the system background through NB wireless communication, and the system background is wirelessly connected to the on-site alarm. The system background is used to calculate the expansion and contraction amount and displacement amount based on the parameters collected by the detector group, as well as the pipeline stress calculation, sealing pressure calculation, soil pressure and friction and wrapping force calculation, and pipeline safety assessment;

[0040] The specific operations are as follows: the displacement detector is used to detect the expansion and displacement, the stress detector is used to detect the pipeline stress, the temperature collector is used to collect the medium temperature, soil temperature, ambient temperature, etc., the pressure collector is used to collect the medium pressure and soil pressure, and the monitoring camera is used to collect the displacement scale, temperature, pressure, on-site conditions and other information. The above-mentioned collected data information is wirelessly transmitted to the system background. The system background calculates the expansion and displacement based on the collected data information, as well as the pipeline stress calculation, sealing pressure calculation, soil pressure and friction and grip force calculation, and pipeline safety assessment. When the result exceeds the preset value, that is, when the limit parameter appears, the on-site alarm is triggered to warn.

[0041] In summary, when the permanent sealed pipeline stress reducer and safety performance detection system is used, first, the ends of the short tube 1 and the telescopic tube 2 that are away from each other are welded to the main pipeline. When the medium is transmitted by using the pipeline, the short tube 1 and the telescopic tube 2, the outer diameter of the anti-drop clamp ring 3 is adapted to the inner diameter of the short tube 1, and the graphite sealing ring 408 and the O-ring 403 that are stacked and pressed layer by layer are matched to ensure the sealing performance, so as to prevent the leakage of the medium during the transmission process;

[0042] When stress is generated due to the high temperature of the transmission medium, the telescopic tube 2 will expand and contract, thereby relieving the stress and avoiding excessive strength of the pipeline. At this time, the anti-dropping clamp ring 3 can prevent the telescopic tube 2 from being excessively extended and detached from the short tube 1. When the telescopic tube 2 expands and contracts, the pressure regulating ring 407 always presses the graphite sealing ring 408 under the pressure of the self-tightening spring 406 to ensure sufficient sealing pressure. The O-ring 403 always slides on its outer wall in disguised form to ensure sealing without hindering the expansion and contraction of the telescopic tube 2.

[0043] The displacement detector is used to detect the expansion and displacement, the stress detector is used to detect the pipeline stress, the temperature collector is used to collect the medium temperature, soil temperature, ambient temperature, etc., the pressure collector is used to collect the medium pressure and soil pressure, and the monitoring camera is used to collect the displacement scale, temperature, pressure, on-site conditions and other information. The above-mentioned collected data information is wirelessly transmitted to the system background. The system background calculates the expansion and displacement amount, as well as the pipeline stress, sealing pressure, soil pressure, friction and holding force, and pipeline safety assessment based on the collected data information. When the result exceeds the preset value, that is, when the limit parameter occurs, the on-site alarm is triggered to warn.

[0044] Example 2

[0045] In order to further improve the accuracy and reliability of the safety performance detection system, the present invention introduces two unreported algorithm models for data processing and analysis.

[0046] Algorithm 1: Pipeline stress anomaly detection algorithm based on quantum neural network

[0047] Model principle: Quantum neural network combines the unique advantages of quantum computing and the powerful learning ability of neural network. In this application, the superposition and entanglement characteristics of quantum bits can be used to more accurately model the complex relationships in pipeline stress data. By encoding the collected pipeline-related parameters (such as temperature, pressure, displacement, etc.) into quantum states and inputting them into the quantum neural network, the network can automatically learn and mine the potential mapping relationship between these parameters and pipeline stress anomalies.

[0048] Algorithm implementation: First, the input data is preprocessed with quantum coding to convert it into a form suitable for quantum neural network input. Then, the architecture of the quantum neural network is constructed to determine parameters such as the number of quantum neurons, the type of quantum gates, and the connection method. In the training phase, the network is trained using historical data marked with normal and abnormal states of pipeline stress, and the network parameters are adjusted through optimization algorithms such as quantum gradient descent so that the network can accurately identify abnormal conditions of pipeline stress. In the actual detection process, the real-time collected data is input into the trained quantum neural network, and the output results are used to determine whether the pipeline stress is in an abnormal state.

[0049] Algorithm 2: Pipeline safety comprehensive assessment algorithm integrating fuzzy logic and deep learning

[0050] Model principle: This algorithm gives full play to the advantages of fuzzy logic in dealing with uncertainty and fuzzy information and the powerful ability of deep learning in feature extraction and data fitting. For pipeline safety assessment, multiple factors are involved (such as stress, temperature, sealing condition, etc.), and the relationship between these factors is often ambiguous. Fuzzy logic can effectively describe these fuzzy relationships by defining fuzzy sets and fuzzy rules. Deep learning automatically extracts key features from a large amount of monitoring data, providing a more accurate basis for fuzzy logic judgment. After the two are integrated, the safety status of the pipeline can be evaluated more comprehensively and accurately.

[0051] Algorithm implementation: First, use deep learning models (such as convolutional neural networks or recurrent neural networks) to extract features from various collected pipeline monitoring data to obtain high-level abstract feature representations of the data. Then, use these features as the input of the fuzzy logic system, and combine the fuzzy sets and fuzzy rules defined by domain experts to perform fuzzy reasoning. For example, based on factors such as the size of the stress value and the amplitude of temperature change, fuzzy rules are used to determine whether the pipeline is at different safety levels, such as safe, relatively safe, and dangerous. Finally, output the safety assessment conclusion of the pipeline based on the results of fuzzy reasoning.

[0052] The supporting safety performance detection system integrates a variety of detection equipment, including displacement detectors, stress detectors, temperature collectors, pressure collectors, surveillance cameras, etc., which can comprehensively collect various parameters related to the operation status of the pipeline. And by introducing advanced algorithm models (such as pipeline stress anomaly detection algorithms based on quantum neural networks and pipeline safety comprehensive assessment algorithms integrating fuzzy logic and deep learning), accurate calculation and safety assessment of pipeline expansion, displacement, stress, sealing pressure, soil pressure, friction and wrapping force are achieved, providing all-round monitoring and early warning guarantees for the safe operation of pipelines.

[0053] Example 3

[0054] In a chemical park, there is a pipeline for transporting high-temperature steam. The diameter of the pipeline is relatively large. In the past, when traditional pipeline stress reducers were used, problems such as poor sealing and frequent maintenance often occurred.

[0055] The permanent sealed pipeline stress reducer and safety performance detection system of the present invention are applied this time, and the specific installation process is as follows:

[0056] First, the ends of the short pipe and the expansion pipe that are far away from each other are accurately welded to the main pipe. When the pipeline is operating normally to transport high-temperature steam, the outer diameter of the anti-dropping clamp ring perfectly matches the inner diameter of the short pipe, and with the stacked graphite sealing rings and O-rings, a tight sealing environment is formed, effectively preventing the leakage of high-temperature steam.

[0057] When the steam temperature changes and causes stress in the pipeline, the expansion tube can be flexibly expanded and contracted. At this time, the anti-dropping clamp effectively prevents the expansion tube from excessively extending out of the short tube. At the same time, the pressure regulating ring expands and contracts with the expansion and contraction of the expansion tube, causing the self-tightening spring to expand and contract accordingly, successfully reducing the pipeline stress and ensuring that the pipeline strength is always within a safe range.

[0058] In terms of the safety performance detection system, the displacement detector monitors the expansion and displacement of the expansion tube in real time, the stress detector accurately detects the pipeline stress, the temperature collector timely collects information such as steam temperature, soil temperature and ambient temperature, the pressure collector collects steam pressure and soil pressure, and the monitoring camera records various conditions on site, including displacement scale, temperature, pressure, etc. These collected data are transmitted to the system background in real time through NB wireless communication.

[0059] The system background processes data based on the pipeline stress anomaly detection algorithm based on quantum neural network and the pipeline safety comprehensive assessment algorithm that integrates fuzzy logic and deep learning. For example, when the steam temperature suddenly rises and the pipeline stress fluctuates, the quantum neural network can quickly detect the stress anomaly and feed back the relevant information to the system background. The system background then combines the pipeline safety comprehensive assessment algorithm that integrates fuzzy logic and deep learning, comprehensively considers multiple factors such as stress, temperature, and sealing pressure, and accurately assesses the safety level of the pipeline. If the assessment results show that the pipeline is in a dangerous state, the system background immediately triggers the on-site alarm and notifies relevant personnel to take timely measures to ensure the safe operation of the pipeline.

[0060] Example 4

[0061] The central heating pipelines in a certain city have to transport hot water for a long time and the pipeline laying environment is complex, so the sealing and stress reduction performance of the pipelines are required to be high.

[0062] When the system of the present invention is used, the installation of the pipeline stress reducer is also completed first, that is, the short pipe and the telescopic pipe are welded to the main pipe. During the heating process, the triple sealing structure effectively prevents the leakage of hot water. Even when the pipeline produces stress changes due to thermal expansion and contraction, the adaptive stress reduction mechanism can also play a good role to ensure the normal operation of the pipeline.

[0063] Various detectors in the safety performance detection system comprehensively collect relevant data, such as the temperature collector collects hot water temperature, soil temperature and ambient temperature, the pressure collector collects hot water pressure and soil pressure, the displacement detector monitors the expansion and displacement of the pipeline, the stress detector detects the pipeline stress, and the surveillance camera records the on-site situation. After these data are transmitted to the system background, they are processed by two advanced detection algorithm models.

[0064] During the winter heating peak, when hot water flow and temperature change greatly, which may cause changes in pipeline stress and sealing conditions, the pipeline stress anomaly detection algorithm based on quantum neural networks can quickly capture small changes in stress and warn of possible problems in advance. The pipeline safety comprehensive assessment algorithm that integrates fuzzy logic and deep learning evaluates the safety status of the pipeline as a whole and takes corresponding measures according to different safety levels, such as adjusting the hot water flow and strengthening pipeline inspections, thereby ensuring the safe and stable operation of the central heating pipeline throughout the heating season.

[0065] It can be seen from the above two embodiments that the permanent sealed pipeline stress reducer and safety performance detection system of the present invention can effectively play its sealing, stress reduction and safety monitoring functions in different pipeline application scenarios, providing reliable guarantee for the safe operation of the pipeline.

[0066] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A permanent sealed pipeline stress reducer, comprising a short pipe (1) and a sealing sleeve assembly (4), characterized in that: A telescopic tube (2) is inserted into the interior of the short tube (1), and an anti-dropping clamp (3) is fixed to the outer wall of one end of the telescopic tube (2) located inside the short tube (1). The sealing sleeve assembly (4) is fixed to the outer wall of the end of the short tube (1). The sealing sleeve assembly (4) comprises a sealing sleeve (401), a groove (402), an O-type sealing ring (403), a bolt (404), a pressure flange (405), a self-tightening spring (406) and a pressure regulating ring (407). A groove (402) is opened inside the sealing sleeve (401), and an O-type sealing ring (403) is embedded in the groove (402). The end of the sealing sleeve (401) away from the short tube (1) is threadedly connected with a bolt (404), and a graphite sealing ring (408) is provided between the O-type sealing ring (403) and the pressure flange (405), and a pressure regulating ring (407) and a self-tightening spring (406) are provided at both ends.

2. The permanent sealed pipeline stress reducer according to claim 1, characterized in that: The outer diameter of the telescopic tube (2) matches the inner diameter of the end of the short tube (1), the outer diameter of the anti-dropping clamp (3) is smaller than the inner diameter of the end of the short tube (1), and the outer diameter of the anti-dropping clamp (3) matches the inner diameter of the inside of the short tube (1).

3. The permanent sealed pipeline stress reducer according to claim 1, characterized in that: The inner side surface of the O-type sealing ring (403) is in contact with the outer wall of the telescopic tube (2), and the number of the O-type sealing rings (403) is at least three.

4. The permanent sealed pipeline stress reducer according to claim 1, characterized in that: The pressure flange (405) is fixedly connected to the sealing sleeve (401) via a bolt (404), and the pressure flange (405) is sleeved on the outside of the telescopic tube (2).

5. The permanent sealed pipeline stress reducer according to claim 1, characterized in that: The pressure regulating ring (407) is sleeved and fixed on the outside of the telescopic tube (2), and the self-tightening spring (406) is distributed in a ring shape on the side of the pressure regulating ring (407).

6. The permanent sealed pipeline stress reducer according to claim 1, characterized in that: The telescopic tube (2) is elastically connected to the sealing sleeve (401) via a pressure regulating ring (407), a self-tightening spring (406) and a pressure flange (405), and the telescopic tube (2) is slidably connected to the short tube (1).

7. The permanent sealed pipeline stress reducer according to claim 1, characterized in that: The sealing sleeve assembly (4) also includes a graphite sealing ring (408), both ends of which are provided with a pressure regulating ring (407) and a self-tightening spring (406).

8. The permanent sealed pipeline stress reducer according to claim 7, characterized in that: The graphite sealing ring (408) is sleeved on the outer wall of the telescopic tube (2), and the graphite sealing ring (408) is in a layered and tightly compressed structure.

9. The permanent sealed pipeline stress reducer according to claim 7, characterized in that: The graphite sealing ring (408) has two pressure regulating rings (407) and a self-tightening spring (406) at both ends, and the graphite sealing ring (408) and the pressure regulating rings (407) at both ends are tightly attached to the inclined surface of the inner wall of the sealing sleeve (401).

10. A pipeline safety performance detection system, which is applied with the permanent sealed pipeline stress reducer according to any one of claims 1 to 9, characterized in that: The safety performance detection system includes a detector group, which includes a displacement detector, a stress detector, a temperature collector, a pressure collector, and a surveillance camera. The detector group is remotely connected to the system background through NB wireless communication, and the system background is wirelessly connected to the on-site alarm. The system background is used to calculate the expansion and contraction amount and the displacement amount based on the parameters collected by the detector group, as well as the pipeline stress calculation, sealing pressure calculation, soil pressure and friction and holding force calculation, and pipeline safety assessment. The safety assessment algorithm adopts a pipeline stress anomaly detection algorithm of a quantum neural network and a pipeline safety comprehensive assessment algorithm that integrates fuzzy logic and deep learning.

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