Continuous laying and water-saving pressure test construction method for long-distance water delivery pipeline

Abstract

The invention relates to a long-distance water delivery pipeline continuous laying and water-saving pressure test construction method, which relates to the technical field of hydraulic engineering construction, and comprises the following steps: S1, carrying out continuous laying of a long-distance water delivery pipeline by using mobile laying equipment; s2, pressure testing is conducted after pipeline laying is completed, and a closed circulation system is used in the pressure testing process; s3, once the test pressure reaches the preset standard, the closed circulation system recycles and treats the water for reutilization, the method is suitable for continuous laying construction of the long-distance water conveying pipeline and the following water-saving pressure test process, especially for the scene where efficient and continuous laying of the pipeline is needed and water resource waste in the pressure test process is reduced, and the method is suitable for popularization and application. While the construction efficiency is improved, the resource consumption is reduced, the safety and environmental friendliness of the construction process are enhanced, and the laying and pressure testing process of the long-distance water conveying pipeline is more efficient and environmentally friendly.

Description

Technical Field

[0001] This application relates to the field of water conservancy engineering construction technology, and in particular to a method for continuous laying and water-saving pressure testing of long-distance water transmission pipelines. Background Technology

[0002] In water conservancy project construction, the laying and pressure testing of long-distance water transmission pipelines are crucial construction stages. Currently, these construction processes generally face certain technical challenges, especially in improving laying efficiency and conserving water resources.

[0003] Existing technology (CN105570533A) discloses a method for continuous laying and water-saving pressure testing of long-distance water transmission pipelines, including the design and fabrication of prefabricated pipeline pressure testing devices, trench excavation, water transmission pipeline installation, installation of prefabricated pipeline pressure testing devices, construction of a water filling system, pipeline filling, pipeline pressure testing, drainage, and pipeline connection. However, research has revealed the following technical problems: the above-mentioned pipeline construction typically adopts a segmented laying method, that is, pressure testing is carried out after each segment of pipeline is laid. Although this method ensures the stability of construction to a certain extent, it increases the laying steps overall, making the construction process cumbersome and inefficient. In addition, the pipeline connection construction time is long, and it is impossible to monitor the pressure testing process and water quality in real time.

[0004] In response to the aforementioned technologies, a solution is proposed. Summary of the Invention

[0005] The purpose of this application is to provide a method for continuous laying and water-saving pressure testing of long-distance water transmission pipelines to solve the technical problems of relatively low construction efficiency and serious water waste in the pressure testing process in the existing technology.

[0006] This application provides a method for continuous laying and water-saving pressure testing of long-distance water transmission pipelines, which adopts the following technical solution: A method for continuous laying and water-saving pressure testing of long-distance water transmission pipelines includes the following steps: S1. Use mobile laying equipment for continuous laying of long-distance water pipelines; S2: Pressure testing is carried out immediately after the pipeline is laid, and a closed-loop system is used during the pressure testing process; S3: Once the test pressure reaches the predetermined standard, the closed-loop system will recycle and treat the water for reuse.

[0007] By adopting the above technical solution, mobile laying equipment is used for the continuous laying of long-distance water pipelines. This equipment can efficiently lay pipelines in different sections, improving construction efficiency. Secondly, pressure testing is conducted immediately after pipeline laying, utilizing a closed-loop system. This system includes a high-pressure water pump used to deliver water into the laid pipeline for pressure testing. Once the test pressure reaches the predetermined standard, the closed-loop system recovers and treats the water for reuse, achieving the goal of conserving water resources.

[0008] Preferably, in step S1, the mobile laying equipment is equipped with an automated control system, the operation steps of which are as follows: Step 1: After receiving the start command, the device starts each component sequentially according to the preset control logic sequence. Step 2: Monitor operating parameters in real time using sensors, including but not limited to temperature, pressure, flow rate, and speed, and compare them with target values; Step 3: Based on the deviation, the control system adjusts the operating state of the actuator using a PID controller algorithm to ensure that the system parameters remain stable within the set range. The formula for the PID controller algorithm is: Where u(t) is the controller output; e(t) is the error signal; K p It is the proportional gain; K i It is the integral gain; K d It is the differential gain.

[0009] By adopting the above scheme, the system can sense the laying speed of the pipeline in real time and automatically adjust the working status of the laying machinery, such as the digging speed and the pipeline installation speed, according to the speed change, thereby ensuring continuous and efficient laying. Among them, the PID controller is a commonly used feedback controller, which adjusts the control variables according to the difference between the set point and the actual process variables.

[0010] Preferably, in step S1, the pipe connection uses a quick coupling, which includes a male connector and a female connector, and the two parts are quickly locked together by a snap-fit ​​structure.

[0011] By adopting the above solution, the design allows for the completion of pipeline connections in a very short time, greatly shortening the construction time. The quick coupling consists of two parts: a male connector and a female connector. The two parts are quickly locked together by a snap-fit ​​structure to ensure the sealing and stability of the connection.

[0012] Preferably, in step S2, the closed-loop system first starts the high-pressure water pump to send the cooling medium into the laid pipeline and begins the pressure test. By adjusting the water seal valves on both sides of the high-pressure water pump, the discharge rate of the packing seal water is controlled to be 3-6 drops / second to ensure the normal operation of the system. At the same time, a pressure sensor is used to monitor the pressure in the pipeline in real time to ensure that the test pressure reaches the predetermined standard. When the test pressure reaches the standard, the closed-loop system will automatically record and release the pressure through the safety valve.

[0013] By adopting the above scheme, the closed-loop system can recover water during the pressure test, treat it, and reuse it, greatly reducing water consumption. At the same time, pressure sensors are used to monitor the pressure in the pipeline in real time, ensuring that the test pressure reaches the predetermined standard, improving the accuracy of the test. Furthermore, the closed-loop system can automatically record key data during the test, such as pressure value and time, which facilitates subsequent data analysis and quality traceability. By analyzing the collected data, the performance of the pipeline can be evaluated, providing a basis for subsequent maintenance and repair.

[0014] Preferably, in step S2, a water quality monitoring device is provided on one side of the pressure sensor, and the water quality monitoring device monitors the quality of the water used in the closed loop system in real time.

[0015] By adopting the above solution, a pressure sensor and a water quality monitoring device are added to the water-saving pressure testing system. The pressure sensor can monitor pressure changes in the pipeline in real time to ensure the safety of the pressure test; the water quality monitoring device is used to detect the quality of the circulating water to ensure that its cleanliness meets the requirements of the pressure test and use.

[0016] Preferably, in step S2, a staged pressure increase method is implemented during the pressure test phase. The staged pressure increase method first conducts an initial test at a low pressure, increases the pressure to 50% of the test pressure, and holds it for 3 minutes for inspection. Then, the pressure is gradually increased. If there are no abnormalities, the pressure is increased layer by layer at 10% of the test pressure. After each pressure increase, the pressure is stabilized for 3 minutes. After reaching the test pressure, the pressure is maintained for 4 hours for long-term pressure stabilization observation. During this period, the pipeline system is continuously monitored.

[0017] By adopting the above scheme, this method first conducts preliminary testing at low pressure, and then gradually increases the pressure to protect and inspect the pipeline. It can more effectively identify possible leaks during the high-pressure stage. By gradually increasing the pressure in stages, it can gradually adapt to pressure changes in the pipeline system, avoiding pipeline rupture or other safety accidents caused by sudden pressure changes. Maintaining stable pressure for a certain period of time at each pressure stage helps to observe the pipeline's performance under stable pressure, ensuring system safety. At the same time, the staged pressure increase method can simulate various pressure conditions that the pipeline may encounter in actual operation, thereby ensuring the stability and reliability of the pipeline in long-term use.

[0018] Preferably, in step S3, the predetermined standard for the test pressure is 1.5 times the design pressure of the pipeline system, and then the recovered water is filtered and purified to ensure that the water quality meets the standards for reuse.

[0019] By adopting the above scheme and setting the test pressure to 1.5 times the design pressure of the pipeline system, the pressure-bearing capacity of the pipeline under extreme working conditions can be effectively tested, ensuring its safety and reliability under normal working pressure. Through high-pressure testing, the sealing, strength, and pressure resistance of the pipeline system can be comprehensively checked, and potential defects can be identified and repaired in a timely manner. Filtering and purifying the recycled water can remove impurities and pollutants from the water, ensuring that the water quality meets the standards for reuse. The treated water can be reused for pressure testing or other construction processes, reducing the demand for fresh water resources and improving the efficiency of water resource utilization.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. To address the problem of low laying efficiency during the construction of long-distance water pipelines, mobile laying equipment and automated control systems can be used to achieve continuous pipeline laying and improve construction efficiency. 2. Traditional pressure testing methods consume a lot of water and waste water resources. Using a closed-loop system for water-saving pressure testing reduces water waste. 3. To address the issue of long construction time for pipe connections, quick couplings can be used to reduce connection time and improve construction efficiency. 4. To address the issue of the inability to monitor the pressure test process and water quality in real time, pressure sensors and water quality monitoring equipment were installed to ensure the safety of the pressure test process and the cleanliness of the water. Attached Figure Description

[0021] Figure 1 This is a process flow diagram of a method for continuous laying and water-saving pressure testing of a long-distance water transmission pipeline according to this application; Figure 2 This is a three-dimensional structural diagram of a quick connector for a method of continuous laying and water-saving pressure testing of long-distance water transmission pipelines according to this application.

[0022] Figure Labels 1. Male connector; 2. Female connector. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1 This application will be described in further detail below.

[0024] This application discloses a method for continuous laying and water-saving pressure testing of long-distance water transmission pipelines.

[0025] Reference Figure 1 A method for continuous laying and water-saving pressure testing of long-distance water transmission pipelines includes the following steps: S1. Use mobile laying equipment for continuous laying of long-distance water pipelines; S2. Pressure testing shall be carried out immediately after the pipeline is laid, and a closed circulation system shall be used during the pressure testing process; S3. Once the test pressure reaches the predetermined standard, the closed-loop system will recycle and treat the water for reuse.

[0026] Specifically, the mobile laying equipment in step S1 is a WINCOO 20-ton tracked pipelaying machine, which is used for the construction of long-distance transportation pipelines and has high operating efficiency. Before laying the water pipeline, the division of the pressure test section is determined with relevant personnel such as designers and supervisors. The construction of the water pipeline is strictly carried out in accordance with the construction specifications, including procedures such as section installation, backfilling and compaction, to ensure that the soil cover thickness on the top of the pipe meets the design requirements. Pressure testing is carried out immediately after the pipeline is laid, using a closed-loop system. Once the test pressure reaches the predetermined standard, the system will automatically recover and treat the water for reuse. By recovering and reusing water resources, the demand for fresh water resources is reduced, the efficiency of water resource utilization is improved, and environmental protection requirements are met.

[0027] Reference Figure 1 In step S1, the mobile laying equipment is equipped with an automated control system, and the operation steps of the automated control system are as follows: Step 1: After receiving the start command, the device starts each part one by one according to the preset control logic sequence; Step 2: Monitor operating parameters in real time using sensors. These parameters include, but are not limited to, temperature, pressure, flow rate, and speed, and compare them with target values. Step 3: Based on the deviation, the control system adjusts the operating state of the actuator using a PID controller algorithm to ensure that the system parameters remain stable within the set range. The formula for the PID controller algorithm is: Where u(t) is the controller output; e(t) is the error signal; K p It is the proportional gain; K i It is the integral gain; K d It is the differential gain.

[0028] Specifically, after receiving the start command, the equipment starts each component sequentially according to the preset control logic sequence. This includes the control system responsible for receiving the start command, the sensor system for real-time monitoring of operating parameters, the high-pressure water pump responsible for sending water into the laid pipeline for pressure testing, and the water treatment system responsible for filtering and purifying the recycled water. This ensures the smooth start-up of the equipment and the coordinated operation of each component. Operating parameters, including but not limited to temperature, pressure, flow rate, and speed, are monitored in real time by sensors. These parameters are compared with target values ​​to assess whether the actual operating state of the system meets expectations. Based on the deviation between the monitored parameters and the target values, the control system adjusts the operating state of the actuators using a PID (Proportional-Integral-Derivative) controller algorithm. The PID controller is a widely used feedback control algorithm; in the formula, K... p Adjust the system's response speed and control precision. Increase K. p It can speed up the system's response and reduce steady-state error, but an excessively large K... p This can lead to system overshoot or even instability; K i This helps eliminate the steady-state error of the system and improves its steady-state accuracy. Increasing K... i It can reduce or eliminate long-term accumulated errors, but an excessively large K... i This could lead to slower system response or even oscillations, K i This is the portion of the controller output that is proportional to the accumulation of past errors; it is responsible for handling the cumulative effect of historical errors. K d Improve the system's dynamic performance, such as reducing overshoot and increasing system stability. Increase K. d It is possible to predict future error trends and make adjustments in advance, but an excessively large K... d This could cause the system to be overly sensitive to noise, K d This is the portion of the controller output that is proportional to the future rate of error change. It adjusts the control action based on the trend of error change, and the formula is obtained by appropriately adjusting K. p K i and K d PID controllers can reduce or eliminate steady-state errors while ensuring fast response, and improve system stability and anti-interference ability.

[0029] Reference Figure 1 and Figure 2 In step S1, the pipe connection adopts a quick coupling, which includes two parts: male coupling 1 and female coupling 2. The two parts of male coupling 1 and female coupling 2 are quickly locked together by a snap-fit ​​structure.

[0030] Specifically, a quick coupling consists of two parts: a male connector 1 and a female connector 2. Male connector 1 is typically the insertion part, while female connector 2 is the receiving part. These two parts are quickly locked together by a snap-fit ​​mechanism. The snap-fit ​​mechanism is designed to quickly and securely connect the two parts and typically includes one or more locking mechanisms, such as spring clips or rotary locks. During connection, the user simply aligns male connector 1 with female connector 2 and activates the snap-fit ​​mechanism through a simple push or rotation action, achieving rapid locking. The snap-fit ​​mechanism utilizes mechanical advantages, making the connection process both fast and eliminating the need for additional tools such as wrenches or screwdrivers. The self-locking characteristic of the snap-fit ​​design ensures that once the two parts are correctly connected, they remain firmly locked until intentionally unlocked. The use of quick couplings significantly reduces the time required for pipe connections, thereby improving overall construction efficiency.

[0031] Reference Figure 1 In step S2, the closed-loop system first starts the high-pressure water pump to send the cooling medium into the laid pipeline and begins the pressure test. By adjusting the water seal valves on both sides of the high-pressure water pump, the discharge rate of the packing seal water is controlled to be 3-6 drops / second to ensure the normal operation of the system. At the same time, the pressure sensor is used to monitor the pressure in the pipeline in real time to ensure that the test pressure reaches the predetermined standard. When the test pressure reaches the standard, the closed-loop system will automatically record and release the pressure through the safety valve.

[0032] Specifically, the closed-loop system first starts the high-pressure water pump, delivering the cooling medium (usually water) into the laid pipeline. This step is crucial for initiating the pressure test. By adjusting the water seal valves on both sides of the high-pressure water pump, the discharge rate of the packing seal water is controlled at 3-6 drops / second. This adjustment ensures the normal operation of the system while preventing excessive water consumption and leakage. A pressure sensor is used to monitor the pressure inside the pipeline in real time, ensuring that the test pressure reaches the predetermined standard. This real-time monitoring is essential for ensuring the safety and functionality of the pipeline. The pressure sensor is a Honeywell 24PCGFA6G. By precisely controlling the water pump output and adjusting the water seal valves, the system can maintain the required test pressure and ensure that the pressure is within a safe range. The closed-loop system design reduces water consumption, especially during high-pressure testing, by controlling the discharge rate to avoid water waste.

[0033] Reference Figure 1 In step S2, a water quality monitoring device is installed on one side of the pressure sensor to monitor the quality of the water used in the closed loop system in real time.

[0034] Specifically, the water quality monitoring equipment collects water quality data in real time, such as pH value, turbidity, and chemical composition, to ensure that the water quality meets the standards for reuse. The model of the water quality monitoring equipment is Hach SC200, which is a smart sensor widely used in industrial and municipal water treatment. It can monitor multiple key water quality parameters. The water quality monitoring equipment uses a variety of sensor technologies, including electrochemical sensors and optical sensors, to detect various chemical substances and physical parameters in the water. By ensuring that the water quality meets the standards, water resources can be reused to the maximum extent and waste can be reduced. At the same time, good water quality can reduce corrosion and scaling of pipes and equipment, and extend the service life of the system.

[0035] Reference Figure 1 In step S2, a staged pressure increase method is implemented during the pressure test phase. The staged pressure increase method first conducts an initial test with a low pressure, increases the pressure to 50% of the test pressure, and holds it for 3 minutes for inspection. Then, the pressure is gradually increased. If there are no abnormalities, the pressure is increased layer by layer by 10% of the test pressure. After each pressure increase, the pressure is stabilized for 3 minutes. After reaching the test pressure, the pressure is maintained for 4 hours for long-term pressure stabilization observation. During this period, the pipeline system is continuously monitored.

[0036] Specifically, an initial test is conducted at a low pressure, gradually increasing the pressure to 50% of the test pressure. The purpose of this stage is to ensure all connections and equipment operate correctly and without leaks at the lower pressure. After the initial test shows no abnormalities, the pressure is gradually increased in increments of 10% of the test pressure. After each pressure increase, the pressure is held steady for 3 minutes to verify the pipeline's performance and safety under gradually increasing pressure. Once the final test pressure is reached, this pressure is maintained for 4 hours for prolonged observation. This step is crucial, simulating the pipeline's durability and stability under actual operating conditions. Throughout the pressure test, the system's performance is continuously monitored, including pressure stability, potential leaks, and any abnormal system responses. By gradually increasing the pressure, the performance of the pipeline system at different pressure levels can be more comprehensively tested, ensuring the system's safe operation at the design pressure. Staged pressure increases effectively prevent system failures or hazards caused by excessively rapid pressure increases, such as pipeline ruptures or interface leaks.

[0037] Reference Figure 1 In step S3, the predetermined standard for the test pressure is 1.5 times the design pressure of the pipeline system. Then, the recycled water is filtered and purified to ensure that the water quality meets the standards for reuse.

[0038] Specifically, the test pressure is set to 1.5 times the design pressure of the pipeline system. This is to ensure that the pipeline maintains its structural and functional integrity even under extreme conditions during actual use. Increasing the test pressure to 1.5 times the design pressure is to verify the pipeline's ability to withstand maximum load. This is a safety margin test designed to ensure the absolute safety and reliability of the pipeline system. Under the condition of reaching 1.5 times the design pressure, the pipeline system is pressure tested to check for leaks or other structural problems. After the test, the recycled water is filtered and purified to remove possible impurities and contaminants. The filtration and purification of the recycled water not only reduces water waste but also reduces environmental pollution, which is in line with the principles of sustainable development. Ensuring that the quality of the treated water meets reuse standards is crucial for protecting the environmental quality and safety of the receiving water body.

[0039] The implementation principle of this application embodiment is as follows: First, a mobile laying equipment is used for the continuous laying of long-distance water transmission pipelines. This equipment can efficiently lay pipelines in different sections, improving construction efficiency. Second, after the pipeline is laid, a pressure test is conducted. During the pressure test, a closed-loop system is used. This system includes a high-pressure water pump to send water into the laid pipeline for pressure testing. Once the test pressure reaches the predetermined standard, the closed-loop system recovers and treats the water for reuse, thereby achieving the goal of saving water resources.

[0040] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be included within the scope of protection of this application.

Claims

1. A method for continuous laying and water-saving pressure testing of long-distance water transmission pipelines, characterized in that, Includes the following steps: S1. Use mobile laying equipment for continuous laying of long-distance water pipelines; S2: Pressure testing is carried out immediately after the pipeline is laid, and a closed-loop system is used during the pressure testing process; S3: Once the test pressure reaches the predetermined standard, the closed-loop system will recycle and treat the water for reuse.

2. The method for continuous laying and water-saving pressure testing of long-distance water transmission pipelines according to claim 1, characterized in that, In step S1, the mobile laying equipment is equipped with an automated control system, and the operation steps of the automated control system are as follows: Step 1: After receiving the start command, the device starts each component sequentially according to the preset control logic sequence. Step 2: Monitor operating parameters in real time using sensors, including but not limited to temperature, pressure, flow rate, and speed, and compare them with target values; Step 3: Based on the deviation, the control system adjusts the operating state of the actuator using a PID controller algorithm to ensure that the system parameters remain stable within the set range. The formula for the PID controller algorithm is: Where u(t) is the controller output; e(t) is the error signal; K p It is the proportional gain; K i It is the integral gain; K d It is the differential gain.

3. The method for continuous laying and water-saving pressure testing of a long-distance water transmission pipeline according to claim 1, characterized in that, In step S1, the pipe is connected using a quick connector, which includes a male connector (1) and a female connector (2). The male connector (1) and the female connector (2) are quickly locked together by a snap-fit ​​structure.

4. The method for continuous laying and water-saving pressure testing of long-distance water transmission pipelines according to claim 1, characterized in that, In step S2, the closed-loop system first starts the high-pressure water pump to send the cooling medium into the laid pipeline and begins the pressure test. By adjusting the water seal valves on both sides of the high-pressure water pump, the discharge rate of the packing seal water is controlled to be 3-6 drops / second to ensure the normal operation of the system. At the same time, a pressure sensor is used to monitor the pressure in the pipeline in real time to ensure that the test pressure reaches the predetermined standard. When the test pressure reaches the standard, the closed-loop system will automatically record the pressure and release the pressure through the safety valve.

5. The method for continuous laying and water-saving pressure testing of long-distance water transmission pipelines according to claim 1, characterized in that, In step S2, a water quality monitoring device is provided on one side of the pressure sensor, and the water quality monitoring device monitors the quality of the water used in the closed loop system in real time.

6. The method for continuous laying and water-saving pressure testing of a long-distance water transmission pipeline according to claim 1, characterized in that, In step S2, a staged pressure increase method is implemented during the pressure test phase. The staged pressure increase method first conducts an initial test at a low pressure, increases the pressure to 50% of the test pressure, and holds it for 3 minutes for inspection. Then, the pressure is gradually increased. If there are no abnormalities, the pressure is increased layer by layer by 10% of the test pressure. After each pressure increase, the pressure is stabilized for 3 minutes. After reaching the test pressure, the pressure is maintained for 4 hours for long-term pressure stabilization observation. During this period, the pipeline system is continuously monitored.

7. The method for continuous laying and water-saving pressure testing of a long-distance water transmission pipeline according to claim 1, characterized in that, In step S3, the predetermined standard for the test pressure is 1.5 times the design pressure of the pipeline system. Then, the recovered water is filtered and purified to ensure that the water quality meets the standards for reuse.

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