A method for controlling the degree of crosslinking in crosslinked polyethylene pipes and a method for evaluating the degree of crosslinking.

Abstract

This invention provides a method for controlling and evaluating the degree of crosslinking in crosslinked polyethylene (CPE) pipes. The method includes: acquiring CPE pipe data at different CPE temperatures and times; determining the relationship between the CPE degree and CPE time at different CPE temperatures; determining the CPE time required for the CPE pipe to reach a CPE threshold at different CPE temperatures; further determining the relationship between CPE temperature and CPE time when the CPE pipe reaches the CPE threshold; acquiring the CPE temperature of a target CPE pipe; and using the target CPE temperature, combined with the relationship between CPE temperature and CPE time when the CPE pipe reaches the CPE threshold, determining a suitable CPE time for controlling the CPE degree of the target CPE pipe.

Description

Technical Field

[0001] This invention relates to a method for controlling the degree of crosslinking of crosslinked polyethylene pipes and a method for evaluating the degree of crosslinking of crosslinked polyethylene pipes. Background Technology

[0002] In recent years, frequent incidents of surface carbon steel pipeline failures due to internal corrosion during oilfield development have posed a severe challenge to on-site safety management, making corrosion control an urgent priority. To address these issues, various composite pipe structures with thermoplastic linings have been developed and widely applied in oilfields. As oilfield operating conditions become increasingly complex, with more demanding operating temperatures and media, higher requirements are placed on the long-term safe operation of flexible composite pipes to meet production needs. Using cross-linked polyethylene (PEX) instead of ordinary polyethylene (PE) as the lining material for flexible composite pipes can significantly improve the temperature resistance and oil / gas swelling resistance of the lining while keeping raw material costs under control, and this technology has been widely adopted in oilfields. During the cross-linking process of PE, linear or slightly branched polymers are transformed into a network molecular structure through chemical substances or high-energy radiation, establishing chemical bonds between molecules. Cross-linked PE not only improves heat resistance, wear resistance, and mechanical strength but also enhances resistance to environmental stress cracking and creep resistance, thus increasing service life.

[0003] Currently, the main raw material for producing PEX pipes is silane-crosslinked polyethylene (PEX-B), and the main production equipment is a pipe extrusion system. PEX-B raw materials are divided into component A and component B. Component A is silane-grafted PE, accounting for 95%, while component B is a catalyst masterbatch, accounting for 5%. During pipe extrusion, components A and B are mixed and then extruded. After extrusion, the PEX pipes undergo water boiling for crosslinking. The temperature and time of boiling determine the degree of crosslinking in the PEX pipes, and the degree of crosslinking is a key factor in improving their performance. In summary, regulating and evaluating the degree of crosslinking in PEX pipes is of great significance for the widespread application of PEX pipes in oilfields. Summary of the Invention

[0004] The purpose of this invention is to provide a technical solution that can quickly and effectively control and evaluate the degree of crosslinking in crosslinked polyethylene pipes. To achieve the above objective, this invention provides the following ten technical solutions;

[0005] In a first aspect, the present invention provides a method for controlling the degree of crosslinking of crosslinked polyethylene pipes, wherein the method includes:

[0006] Obtain crosslinking degree data of crosslinked polyethylene pipes at different crosslinking temperatures and times;

[0007] Based on the crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times, the relationship between the crosslinking degree and crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures was determined.

[0008] Based on the relationship between the degree of crosslinking and the crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures, the crosslinking time required for crosslinked polyethylene pipes to reach the crosslinking degree threshold at different crosslinking temperatures was determined.

[0009] Based on the crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures to reach the crosslinking degree threshold, the relationship between crosslinking temperature and crosslinking time when crosslinked polyethylene pipes reach the crosslinking degree threshold is determined.

[0010] Obtain the crosslinking temperature of the target crosslinked polyethylene pipe;

[0011] By utilizing the crosslinking temperature of the target crosslinked polyethylene pipe and combining the relationship between the crosslinking temperature and crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold, a suitable crosslinking time for the target crosslinked polyethylene pipe is determined to regulate the crosslinking degree of the target crosslinked polyethylene pipe.

[0012] According to the preferred embodiment of the first aspect, the degree of crosslinking data of the crosslinked polyethylene pipes obtained at different crosslinking temperatures and different crosslinking times are determined in the following manner:

[0013] Pipe sections are extruded using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe material.

[0014] Multiple samples were taken from the product of the pipe section extrusion molding and cross-linked at different temperatures and times under the same cross-linking medium conditions as the target cross-linked polyethylene pipe.

[0015] The degree of crosslinking of each crosslinked product was tested to obtain crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times.

[0016] More preferably, the different crosslinking temperatures include at least three temperature points selected within the range of 60-100°C;

[0017] More preferably, the different crosslinking times include at least four time periods within the range of 6-24 hours;

[0018] More preferably, the crosslinking medium is pure water.

[0019] According to the preferred embodiment of the first aspect, the relationship between the degree of crosslinking and the crosslinking time of the crosslinked polyethylene pipe at a certain crosslinking temperature is as follows:

[0020] Y=a i X+b i

[0021] In the formula, Y represents the degree of crosslinking (%), X represents the crosslinking time (h), and a i b i is the coefficient at the i-th crosslinking temperature.

[0022] According to the preferred embodiment of the first aspect, the crosslinking threshold is 65-80% (e.g., 70%).

[0023] According to the preferred embodiment of the first aspect, the relationship between crosslinking temperature and crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold is as follows:

[0024] ln(1 / t) = -A·(1 / T) + B

[0025] In the formula: T is the crosslinking temperature, in K; t is the crosslinking time when the degree of crosslinking reaches the crosslinking threshold, in h.

[0026] According to the preferred embodiment of the first aspect, by utilizing the crosslinking temperature of the target crosslinked polyethylene pipe and combining the relationship between the crosslinking temperature and crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold, the appropriate crosslinking time for the target crosslinked polyethylene pipe is determined, and the crosslinking degree of the target crosslinked polyethylene pipe is controlled, including:

[0027] By utilizing the crosslinking temperature of the target crosslinked polyethylene pipe and combining the relationship between crosslinking temperature and crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold, the crosslinking time corresponding to the crosslinking degree threshold under the crosslinking temperature of the target crosslinked polyethylene pipe is determined as the predicted crosslinking time. Based on the predicted crosslinking time, a suitable crosslinking time for the target crosslinked polyethylene pipe is determined to regulate the crosslinking degree of the target crosslinked polyethylene pipe.

[0028] Preferably, the appropriate crosslinking time for the target crosslinked polyethylene pipe is 0.9-1.1 times the predicted crosslinking time.

[0029] Secondly, the present invention provides a crosslinking degree control system for crosslinked polyethylene pipes, wherein the system comprises:

[0030] First data acquisition module: used to acquire cross-linking degree data of cross-linked polyethylene pipes obtained at different cross-linking temperatures and times;

[0031] The first fitting module is used to determine the relationship between the degree of crosslinking and the crosslinking time of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times.

[0032] The second data acquisition module is used to determine the crosslinking time for crosslinked polyethylene pipes to reach the crosslinking degree threshold at different crosslinking temperatures, based on the relationship between the degree of crosslinking and the crosslinking time at different crosslinking temperatures.

[0033] The second fitting module is used to determine the relationship between crosslinking temperature and crosslinking time when crosslinked polyethylene pipes reach the crosslinking degree threshold based on the crosslinking time at different crosslinking temperatures.

[0034] The third data acquisition module is used to acquire the crosslinking temperature of the target crosslinked polyethylene pipe.

[0035] Crosslinking time determination module: This module is used to determine the appropriate crosslinking time for the target crosslinked polyethylene pipe by utilizing the crosslinking temperature of the target crosslinked polyethylene pipe and combining the relationship between the crosslinking temperature and crosslinking time when the crosslinking degree threshold is reached. This allows for the control of the crosslinking degree of the target crosslinked polyethylene pipe.

[0036] According to the preferred embodiment of the second aspect, the degree of crosslinking of the crosslinked polyethylene pipes obtained at different crosslinking temperatures and different crosslinking times is determined in the following manner:

[0037] Pipe sections are extruded using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe material.

[0038] Multiple samples were taken from the product of the pipe section extrusion molding and cross-linked at different temperatures and times under the same cross-linking medium conditions as the target cross-linked polyethylene pipe.

[0039] The degree of crosslinking of each crosslinked product was tested to obtain crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times.

[0040] More preferably, the different crosslinking temperatures include at least three temperature points selected within the range of 60-100°C;

[0041] More preferably, the different crosslinking times include at least four time periods within the range of 6-24 hours;

[0042] More preferably, the crosslinking medium is pure water.

[0043] According to the preferred embodiment of the second aspect, the relationship between the degree of crosslinking and the crosslinking time of the crosslinked polyethylene pipe at a certain crosslinking temperature is as follows:

[0044] Y=a i X+b i

[0045] In the formula, Y represents the degree of crosslinking (%), X represents the crosslinking time (h), and ai b i is the coefficient at the i-th crosslinking temperature.

[0046] According to the preferred embodiment of the second aspect, the crosslinking threshold is 65-80% (e.g., 70%).

[0047] According to the preferred embodiment of the second aspect, the relationship between crosslinking temperature and crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold is as follows:

[0048] ln(1 / t) = -A·(1 / T) + B

[0049] In the formula: T is the crosslinking temperature, in K; t is the crosslinking time when the degree of crosslinking reaches the crosslinking threshold, in h.

[0050] According to the preferred embodiment of the second aspect, the crosslinking time determination module includes:

[0051] The predicted crosslinking time determination submodule is used to determine the predicted crosslinking time by using the crosslinking temperature of the target crosslinked polyethylene pipe and the relationship between the crosslinking temperature and the crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold. The predicted crosslinking time is the crosslinking time when the crosslinking degree reaches the crosslinking degree threshold under the crosslinking temperature condition of the target crosslinked polyethylene pipe.

[0052] Crosslinking time determination submodule: used to determine the appropriate crosslinking time for the target crosslinked polyethylene pipe based on the predicted crosslinking time, and to control the degree of crosslinking of the target crosslinked polyethylene pipe; preferably, the appropriate crosslinking time for the target crosslinked polyethylene pipe is 0.9-1.1 times the predicted crosslinking time.

[0053] Thirdly, the present invention provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the crosslinking degree control method for crosslinked polyethylene pipes provided in the first aspect.

[0054] Fourthly, the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the crosslinking degree control method for crosslinked polyethylene pipes provided in the first aspect.

[0055] Fifthly, the present invention provides a computer program product, the computer program product comprising a computer program, which, when executed by a processor, implements the crosslinking degree control method for crosslinked polyethylene pipes provided in the first aspect.

[0056] Sixthly, the present invention provides a method for evaluating the degree of crosslinking of crosslinked polyethylene pipes, wherein the method includes:

[0057] Obtain crosslinking degree data of crosslinked polyethylene pipes at different crosslinking temperatures and times;

[0058] Based on the crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times, the relationship between the crosslinking degree and crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures was determined.

[0059] Based on the relationship between the degree of crosslinking and the crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures, the crosslinking time required for crosslinked polyethylene pipes to reach the crosslinking degree threshold at different crosslinking temperatures was determined.

[0060] Based on the crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures to reach the crosslinking degree threshold, the relationship between crosslinking temperature and crosslinking time when crosslinked polyethylene pipes reach the crosslinking degree threshold is determined.

[0061] Obtain the crosslinking temperature and crosslinking time of the target crosslinked polyethylene pipe;

[0062] The crosslinking degree of the target crosslinked polyethylene pipe is evaluated by using the crosslinking temperature and crosslinking time of the target crosslinked polyethylene pipe, combined with the relationship between crosslinking temperature and crosslinking time when the crosslinking degree of the crosslinked polyethylene pipe reaches the crosslinking degree threshold.

[0063] According to the preferred embodiment of the sixth aspect, the degree of crosslinking data of the crosslinked polyethylene pipes obtained at different crosslinking temperatures and different crosslinking times are determined in the following manner:

[0064] Pipe sections are extruded using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe material.

[0065] Multiple samples were taken from the product of the pipe section extrusion molding and cross-linked at different temperatures and times under the same cross-linking medium conditions as the target cross-linked polyethylene pipe.

[0066] The degree of crosslinking of each crosslinked product was tested to obtain crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times.

[0067] More preferably, the different crosslinking temperatures include at least three temperature points selected within the range of 60-100°C;

[0068] More preferably, the different crosslinking times include at least four time periods within the range of 6-24 hours;

[0069] More preferably, the crosslinking medium is pure water.

[0070] According to the preferred embodiment of the sixth aspect, the relationship between the degree of crosslinking and the crosslinking time of the crosslinked polyethylene pipe at a certain crosslinking temperature is as follows:

[0071] Y=a i X+b i

[0072] In the formula, Y represents the degree of crosslinking (%), X represents the crosslinking time (h), and a i b i is the coefficient at the i-th crosslinking temperature.

[0073] According to the preferred embodiment of the sixth aspect, the crosslinking threshold is 65-80% (e.g., 70%).

[0074] According to the preferred embodiment of the sixth aspect, the relationship between crosslinking temperature and crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold is as follows:

[0075] ln(1 / t) = -A·(1 / T) + B

[0076] In the formula: T is the crosslinking temperature, in K; t is the crosslinking time when the degree of crosslinking reaches the crosslinking threshold, in h.

[0077] According to the preferred embodiment of the sixth aspect, the crosslinking degree of the target crosslinked polyethylene pipe is evaluated by utilizing the crosslinking temperature and crosslinking time of the target crosslinked polyethylene pipe, combined with the relationship between crosslinking temperature and crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold, including:

[0078] By utilizing the crosslinking temperature of the target crosslinked polyethylene pipe and combining the relationship between crosslinking temperature and crosslinking time when the crosslinking degree threshold is reached, the crosslinking time corresponding to the crosslinking degree threshold under the crosslinking temperature condition of the target crosslinked polyethylene pipe is determined as the predicted crosslinking time. Based on the predicted crosslinking time and the crosslinking time of the target crosslinked polyethylene pipe, the crosslinking degree of the target crosslinked polyethylene pipe is evaluated to determine whether it is qualified.

[0079] Preferably, the crosslinking degree of the target crosslinked polyethylene pipe is qualified when the predicted crosslinking time is 0.9-1.1 times the crosslinking time of the target crosslinked polyethylene pipe; otherwise, the crosslinking degree of the target crosslinked polyethylene pipe is unqualified.

[0080] In a seventh aspect, the present invention provides a crosslinking degree evaluation system for crosslinked polyethylene pipes, wherein the system comprises:

[0081] First data acquisition unit: used to acquire cross-linking degree data of cross-linked polyethylene pipes obtained at different cross-linking temperatures and times;

[0082] The first fitting unit is used to determine the relationship between the degree of crosslinking and the crosslinking time of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times.

[0083] The second data acquisition unit is used to determine the crosslinking time for crosslinked polyethylene pipes to reach the crosslinking degree threshold at different crosslinking temperatures, based on the relationship between the degree of crosslinking and the crosslinking time at different crosslinking temperatures.

[0084] The second fitting unit is used to determine the relationship between crosslinking temperature and crosslinking time when crosslinked polyethylene pipes reach the crosslinking degree threshold based on the crosslinking time at different crosslinking temperatures.

[0085] The third data acquisition unit is used to acquire the crosslinking temperature and crosslinking time of the target crosslinked polyethylene pipe.

[0086] Crosslinking degree evaluation unit: Used to evaluate the crosslinking degree of the target crosslinked polyethylene pipe by combining the crosslinking temperature and crosslinking time of the target crosslinked polyethylene pipe with the relationship between crosslinking temperature and crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold.

[0087] According to the preferred embodiment of the seventh aspect, the degree of crosslinking data of the crosslinked polyethylene pipes obtained at different crosslinking temperatures and different crosslinking times are determined in the following manner:

[0088] Pipe sections are extruded using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe material.

[0089] Multiple samples were taken from the product of the pipe section extrusion molding and cross-linked at different temperatures and times under the same cross-linking medium conditions as the target cross-linked polyethylene pipe.

[0090] The degree of crosslinking of each crosslinked product was tested to obtain crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times.

[0091] More preferably, the different crosslinking temperatures include at least three temperature points selected within the range of 60-100°C;

[0092] More preferably, the different crosslinking times include at least four time periods within the range of 6-24 hours;

[0093] More preferably, the crosslinking medium is pure water.

[0094] According to the preferred embodiment of aspect seven, the relationship between the degree of crosslinking and the crosslinking time of crosslinked polyethylene pipe at a certain crosslinking temperature is as follows:

[0095] Y=a i X+b i

[0096] In the formula, Y represents the degree of crosslinking (%), X represents the crosslinking time (h), and a i b i is the coefficient at the i-th crosslinking temperature.

[0097] According to the preferred embodiment of the seventh aspect, the crosslinking threshold is 65-80% (e.g., 70%).

[0098] According to the preferred embodiment of the seventh aspect, the relationship between crosslinking temperature and crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold is as follows:

[0099] ln(1 / t) = -A·(1 / T) + B

[0100] In the formula: T is the crosslinking temperature, in K; t is the crosslinking time when the degree of crosslinking reaches the crosslinking threshold, in h.

[0101] According to the preferred embodiment of aspect seven, the crosslinking degree evaluation unit includes:

[0102] The predicted crosslinking time determination subunit is used to determine the predicted crosslinking time by using the crosslinking temperature of the target crosslinked polyethylene pipe and combining the relationship between the crosslinking temperature and the crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold. The predicted crosslinking time is the crosslinking time when the crosslinking degree reaches the crosslinking degree threshold under the crosslinking temperature condition of the target crosslinked polyethylene pipe.

[0103] Crosslinking degree evaluation subunit: used to evaluate whether the crosslinking degree of the target crosslinked polyethylene pipe is qualified based on the predicted crosslinking time and the crosslinking time of the target crosslinked polyethylene pipe; preferably, the crosslinking degree of the target crosslinked polyethylene pipe is qualified when the predicted crosslinking time is 0.9-1.1 times the crosslinking time of the target crosslinked polyethylene pipe, otherwise the crosslinking degree of the target crosslinked polyethylene pipe is unqualified.

[0104] Eighthly, the present invention provides a computer device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the crosslinking degree evaluation method for crosslinked polyethylene pipes provided in the sixth aspect.

[0105] In a ninth aspect, the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method for evaluating the degree of crosslinking of crosslinked polyethylene pipes provided in the sixth aspect.

[0106] In a tenth aspect, the present invention provides a computer program product comprising a computer program that, when executed by a processor, implements the method for evaluating the degree of crosslinking of crosslinked polyethylene pipes provided in the sixth aspect.

[0107] Compared with existing technologies, it has the following advantages:

[0108] 1. The technical solution provided by this invention determines the appropriate crosslinking time for the target crosslinked polyethylene pipe based on the temperature-time relationship under the crosslinking degree threshold condition, thereby regulating the crosslinking of the target crosslinked polyethylene pipe. Using the technical solution provided by this invention, the appropriate crosslinking time at different crosslinking temperatures can be quickly determined without repeatedly conducting crosslinking degree tests. This guides the crosslinking of the target crosslinked polyethylene pipe, effectively ensuring the crosslinking degree and thus guaranteeing the performance of the target crosslinked polyethylene pipe. It also helps to rationally arrange production, improve production efficiency, and achieve energy conservation and emission reduction.

[0109] 2. The technical solution provided by this invention evaluates the crosslinking degree of target crosslinked polyethylene pipes based on the temperature-time correlation under the crosslinking degree threshold condition. This overcomes the traditional xylene extraction method and enables rapid evaluation of pipe crosslinking degree, reducing the risk of handling toxic and harmful substances and environmental pollution. Attached Figure Description

[0110] Figure 1 This is a flowchart of a method for controlling the degree of crosslinking of crosslinked polyethylene pipes in a specific implementation.

[0111] Figure 2 This is a flowchart of a method for evaluating the degree of crosslinking of crosslinked polyethylene pipes in a specific implementation.

[0112] Figure 3 This is a graph showing the relationship between the degree of crosslinking and the crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures in Example 1.

[0113] Figure 4 This is a graph showing the relationship between crosslinking temperature and crosslinking time when the crosslinked polyethylene pipe in Example 1 reaches the crosslinking degree threshold. Detailed Implementation

[0114] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0115] In the description of this specification, the terms "comprising," "including," "having," and "containing" are open-ended terms, meaning that they include but are not limited to. The terms "an embodiment," "a specific embodiment," "some embodiments," and "for example," etc., refer to specific features, structures, or characteristics described in connection with that embodiment or example that are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. The order of steps involved in the various embodiments is used to illustrate the implementation of this application, and the order of steps is not limited and can be adjusted appropriately as needed.

[0116] This invention provides a method for controlling the degree of crosslinking in crosslinked polyethylene pipes, the process of which is as follows: Figure 1 As shown, the method includes the following steps:

[0117] Step 101: Obtain crosslinking degree data of crosslinked polyethylene pipes at different crosslinking temperatures and times;

[0118] Step 102: Based on the crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and different crosslinking times, determine the relationship between the crosslinking degree and crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures;

[0119] Step 103: Based on the relationship between the degree of crosslinking and the crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures, determine the crosslinking time required for crosslinked polyethylene pipes to reach the crosslinking degree threshold at different crosslinking temperatures;

[0120] Step 104: Based on the crosslinking time of crosslinked polyethylene pipes reaching the crosslinking degree threshold at different crosslinking temperatures, determine the relationship between crosslinking temperature and crosslinking time when crosslinked polyethylene pipes reach the crosslinking degree threshold.

[0121] Step 105: Obtain the crosslinking temperature of the target crosslinked polyethylene pipe;

[0122] Step 106: Using the crosslinking temperature of the target crosslinked polyethylene pipe, and combining the relationship between the crosslinking temperature and crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold, determine the appropriate crosslinking time for the target crosslinked polyethylene pipe and adjust the crosslinking degree of the target crosslinked polyethylene pipe.

[0123] In one embodiment, the degree of crosslinking of the crosslinked polyethylene pipes obtained at different crosslinking temperatures and times in step 101 can be determined in the following manner:

[0124] Pipe sections are extruded using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe material.

[0125] Multiple samples were taken from the product of the pipe section extrusion molding and cross-linked at different temperatures and times under the same cross-linking medium conditions as the target cross-linked polyethylene pipe.

[0126] The degree of crosslinking of each crosslinked product was tested to obtain crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times.

[0127] Furthermore, the different crosslinking temperatures include at least three temperature points selected within the range of 60-100°C;

[0128] Furthermore, the different crosslinking times include at least four time periods within the range of 6-24 hours;

[0129] Furthermore, the crosslinking medium is pure water.

[0130] In one embodiment, in step 102, the relationship between the degree of crosslinking and the crosslinking time of the crosslinked polyethylene pipe at a certain crosslinking temperature is as follows:

[0131] Y=a i X+b i

[0132] In the formula, Y represents the degree of crosslinking (%), X represents the crosslinking time (h), and a i b i is the coefficient at the i-th crosslinking temperature.

[0133] In one embodiment, step 103, the connectivity threshold is 65-80% (e.g., 70%).

[0134] In one embodiment, in step 104, the relationship between crosslinking temperature and crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold is as follows:

[0135] ln(1 / t) = -A·(1 / T) + B

[0136] In the formula: T is the crosslinking temperature, in K; t is the crosslinking time when the degree of crosslinking reaches the crosslinking threshold, in h.

[0137] In one embodiment, step 106 includes:

[0138] By utilizing the crosslinking temperature of the target crosslinked polyethylene pipe and combining the relationship between the crosslinking temperature and the crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold, the crosslinking time corresponding to the crosslinking degree threshold under the crosslinking temperature condition of the target crosslinked polyethylene pipe is determined as the predicted crosslinking time. Based on the predicted crosslinking time, the appropriate crosslinking time for the target crosslinked polyethylene pipe is determined.

[0139] Furthermore, the appropriate crosslinking time for the target crosslinked polyethylene pipe is 0.9-1.1 times the predicted crosslinking time.

[0140] This invention provides a method for evaluating the degree of crosslinking of crosslinked polyethylene pipes, the process of which is as follows: Figure 2 As shown, the method includes the following steps:

[0141] Step 201: Obtain crosslinking degree data of crosslinked polyethylene pipes at different crosslinking temperatures and times;

[0142] Step 202: Based on the crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and different crosslinking times, determine the relationship between the crosslinking degree and crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures;

[0143] Step 203: Based on the relationship between the degree of crosslinking and the crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures, determine the crosslinking time required for crosslinked polyethylene pipes to reach the crosslinking degree threshold at different crosslinking temperatures;

[0144] Step 204: Based on the crosslinking time of crosslinked polyethylene pipes reaching the crosslinking degree threshold at different crosslinking temperatures, determine the relationship between crosslinking temperature and crosslinking time when crosslinked polyethylene pipes reach the crosslinking degree threshold.

[0145] Step 205: Obtain the crosslinking temperature and crosslinking time of the target crosslinked polyethylene pipe;

[0146] Step 206: Using the crosslinking temperature and crosslinking time of the target crosslinked polyethylene pipe, and combining the relationship between crosslinking temperature and crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold, the crosslinking degree of the target crosslinked polyethylene pipe is evaluated.

[0147] In one embodiment, the degree of crosslinking of the crosslinked polyethylene pipes obtained at different crosslinking temperatures and times in step 201 can be determined in the following manner:

[0148] Pipe sections are extruded using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe material.

[0149] Multiple samples were taken from the product of the pipe section extrusion molding and cross-linked at different temperatures and times under the same cross-linking medium conditions as the target cross-linked polyethylene pipe.

[0150] The degree of crosslinking of each crosslinked product was tested to obtain crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times.

[0151] Furthermore, the different crosslinking temperatures include at least three temperature points selected within the range of 60-100°C;

[0152] Furthermore, the different crosslinking times include at least four time periods within the range of 6-24 hours;

[0153] Furthermore, the crosslinking medium is pure water.

[0154] In one embodiment, in step 202, the relationship between the degree of crosslinking and the crosslinking time of the crosslinked polyethylene pipe at a certain crosslinking temperature is as follows:

[0155] Y=a i X+b i

[0156] In the formula, Y represents the degree of crosslinking (%), X represents the crosslinking time (h), and a i b i is the coefficient at the i-th crosslinking temperature.

[0157] In one embodiment, step 203, the connectivity threshold is 65-80% (e.g., 70%).

[0158] In one embodiment, in step 204, the relationship between crosslinking temperature and crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold is as follows:

[0159] ln(1 / t) = -A·(1 / T) + B

[0160] In the formula: T is the crosslinking temperature, in K; t is the crosslinking time when the degree of crosslinking reaches the crosslinking threshold, in h.

[0161] In one embodiment, step 206 includes:

[0162] By utilizing the crosslinking temperature of the target crosslinked polyethylene pipe and combining the relationship between crosslinking temperature and crosslinking time when the crosslinking degree threshold is reached, the crosslinking time corresponding to the crosslinking degree threshold under the crosslinking temperature condition of the target crosslinked polyethylene pipe is determined as the predicted crosslinking time. Based on the predicted crosslinking time and the crosslinking time of the target crosslinked polyethylene pipe, the crosslinking degree of the target crosslinked polyethylene pipe is evaluated to determine whether it is qualified.

[0163] Furthermore, if the predicted crosslinking time is 0.9-1.1 times that of the target crosslinked polyethylene pipe, the crosslinking degree of the target crosslinked polyethylene pipe is qualified; otherwise, the crosslinking degree of the target crosslinked polyethylene pipe is unqualified.

[0164] This invention also provides a crosslinking degree control system for crosslinked polyethylene pipes, as described in the following embodiments. Since the principle by which this device solves the problem is similar to the crosslinking degree control method for crosslinked polyethylene pipes, the implementation of this device can refer to the implementation of the crosslinking degree control method for crosslinked polyethylene pipes, and repeated details will not be elaborated further. The crosslinking degree control system for crosslinked polyethylene pipes provided in this invention includes:

[0165] First data acquisition module 301: used to acquire cross-linking degree data of cross-linked polyethylene pipes obtained at different cross-linking temperatures and different cross-linking times;

[0166] First fitting module 302: used to determine the relationship between the degree of crosslinking and the crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures and times based on the crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times;

[0167] The second data acquisition module 303 is used to determine the crosslinking time for crosslinked polyethylene pipes to reach the crosslinking degree threshold at different crosslinking temperatures based on the relationship between the degree of crosslinking and the crosslinking time at different crosslinking temperatures.

[0168] The second fitting module 304 is used to determine the relationship between crosslinking temperature and crosslinking time when crosslinked polyethylene pipes reach the crosslinking degree threshold based on the crosslinking time when crosslinked polyethylene pipes reach the crosslinking degree threshold at different crosslinking temperatures.

[0169] The third data acquisition module 305 is used to acquire the crosslinking temperature of the target crosslinked polyethylene pipe.

[0170] Crosslinking time determination module 306: Used to determine the appropriate crosslinking time for the target crosslinked polyethylene pipe by utilizing the crosslinking temperature of the target crosslinked polyethylene pipe and combining the relationship between the crosslinking temperature and crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold, so as to regulate the crosslinking degree of the target crosslinked polyethylene pipe.

[0171] In one embodiment, the degree of crosslinking data of the crosslinked polyethylene pipe obtained at different crosslinking temperatures and different crosslinking times in the first data acquisition module 301 can be determined in the following manner:

[0172] Pipe sections are extruded using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe material.

[0173] Multiple samples were taken from the product of the pipe section extrusion molding and cross-linked at different temperatures and times under the same cross-linking medium conditions as the target cross-linked polyethylene pipe.

[0174] The degree of crosslinking of each crosslinked product was tested to obtain crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times.

[0175] Furthermore, the different crosslinking temperatures include at least three temperature points selected within the range of 60-100°C;

[0176] Furthermore, the different crosslinking times include at least four time periods within the range of 6-24 hours;

[0177] Furthermore, the crosslinking medium is pure water.

[0178] In one embodiment, the first fitting module 302 defines the relationship between the degree of crosslinking and the crosslinking time of the crosslinked polyethylene pipe at a certain crosslinking temperature as follows:

[0179] Y=a i X+b i

[0180] In the formula, Y represents the degree of crosslinking (%), X represents the crosslinking time (h), and a i b i is the coefficient at the i-th crosslinking temperature.

[0181] In one embodiment, the second data acquisition module 303 has a connectivity threshold of 65-80% (e.g., 70%).

[0182] In one embodiment, the second fitting module 304 defines the relationship between crosslinking temperature and crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold as follows:

[0183] ln(1 / t) = -A·(1 / T) + B

[0184] In the formula: T is the crosslinking temperature, in K; t is the crosslinking time when the degree of crosslinking reaches the crosslinking threshold, in h.

[0185] In one embodiment, the crosslinking time determination module 306 includes:

[0186] The predicted crosslinking time determination submodule 3061 is used to determine the predicted crosslinking time by using the crosslinking temperature of the target crosslinked polyethylene pipe and combining the relationship between the crosslinking temperature and the crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold. The predicted crosslinking time is the crosslinking time when the crosslinking degree reaches the crosslinking degree threshold under the crosslinking temperature condition of the target crosslinked polyethylene pipe.

[0187] Crosslinking time determination submodule 3062: used to determine the appropriate crosslinking time for the target crosslinked polyethylene pipe based on the predicted crosslinking time; further, the appropriate crosslinking time for the target crosslinked polyethylene pipe is 0.9-1.1 times the predicted crosslinking time.

[0188] This invention also provides a crosslinking degree evaluation system for crosslinked polyethylene pipes, as described in the following embodiments. Since the principle by which this device solves the problem is similar to the crosslinking degree evaluation method for crosslinked polyethylene pipes, the implementation of this device can refer to the implementation of the crosslinking degree evaluation method for crosslinked polyethylene pipes, and repeated details will not be elaborated further. The crosslinking degree evaluation system for crosslinked polyethylene pipes provided in this invention includes:

[0189] First data acquisition unit 401: used to acquire cross-linking degree data of cross-linked polyethylene pipes obtained at different cross-linking temperatures and different cross-linking times;

[0190] First fitting unit 402: used to determine the relationship between the degree of crosslinking and the crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures and times based on the crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times;

[0191] Second data acquisition unit 403: used to determine the crosslinking time for crosslinked polyethylene pipes to reach the crosslinking degree threshold at different crosslinking temperatures based on the relationship between the degree of crosslinking and the crosslinking time at different crosslinking temperatures;

[0192] The second fitting unit 404 is used to determine the relationship between crosslinking temperature and crosslinking time when crosslinked polyethylene pipes reach the crosslinking degree threshold based on the crosslinking time when crosslinked polyethylene pipes reach the crosslinking degree threshold at different crosslinking temperatures.

[0193] The third data acquisition unit 405 is used to acquire the crosslinking temperature and crosslinking time of the target crosslinked polyethylene pipe.

[0194] Crosslinking degree evaluation unit 406: Used to evaluate the crosslinking degree of the target crosslinked polyethylene pipe by combining the crosslinking temperature of the target crosslinked polyethylene pipe with the relationship between the crosslinking temperature and the crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold.

[0195] In one embodiment, the degree of crosslinking data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and different crosslinking times in the first data acquisition unit 401 can be determined in the following manner:

[0196] Pipe sections are extruded using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe material.

[0197] Multiple samples were taken from the product of the pipe section extrusion molding and cross-linked at different temperatures and times under the same cross-linking medium conditions as the target cross-linked polyethylene pipe.

[0198] The degree of crosslinking of each crosslinked product was tested to obtain crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times.

[0199] Furthermore, the different crosslinking temperatures include at least three temperature points selected within the range of 60-100°C;

[0200] Furthermore, the different crosslinking times include at least four time periods within the range of 6-24 hours;

[0201] Furthermore, the crosslinking medium is pure water.

[0202] In one embodiment, the first fitting unit 402 defines the relationship between the degree of crosslinking and the crosslinking time of the crosslinked polyethylene pipe at a certain crosslinking temperature as follows:

[0203] Y=a i X+b i

[0204] In the formula, Y represents the degree of crosslinking (%), X represents the crosslinking time (h), and a i b i is the coefficient at the i-th crosslinking temperature.

[0205] In one embodiment, the second data acquisition unit 403 has a connectivity threshold of 65-80% (e.g., 70%).

[0206] In one embodiment, the relationship between crosslinking temperature and crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold is as follows, according to the second fitting unit 404:

[0207] ln(1 / t) = -A·(1 / T) + B

[0208] In the formula: T is the crosslinking temperature, in K; t is the crosslinking time when the degree of crosslinking reaches the crosslinking threshold, in h.

[0209] In one embodiment, the crosslinking degree evaluation unit 406 includes:

[0210] The predicted crosslinking time determination subunit 4061 is used to determine the predicted crosslinking time by using the crosslinking temperature of the target crosslinked polyethylene pipe and combining the relationship between the crosslinking temperature and the crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold. The predicted crosslinking time is the crosslinking time when the crosslinking degree reaches the crosslinking degree threshold under the crosslinking temperature condition of the target crosslinked polyethylene pipe.

[0211] Crosslinking degree evaluation subunit 4062: used to evaluate whether the crosslinking degree of the target crosslinked polyethylene pipe is qualified based on the predicted crosslinking time and the crosslinking time of the target crosslinked polyethylene pipe; further, the crosslinking degree of the target crosslinked polyethylene pipe is qualified when the predicted crosslinking time is 0.9-1.1 times the crosslinking time of the target crosslinked polyethylene pipe, otherwise the crosslinking degree of the target crosslinked polyethylene pipe is unqualified.

[0212] This invention also provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-described method for controlling the crosslinking degree of crosslinked polyethylene pipes.

[0213] This invention also provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-described method for evaluating the crosslinking degree of crosslinked polyethylene pipes.

[0214] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for controlling the degree of crosslinking of crosslinked polyethylene pipes.

[0215] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for evaluating the degree of crosslinking of crosslinked polyethylene pipes.

[0216] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described method for controlling the degree of crosslinking of crosslinked polyethylene pipes.

[0217] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described method for evaluating the degree of crosslinking of crosslinked polyethylene pipes.

[0218] Example 1:

[0219] This embodiment provides a method for controlling the degree of crosslinking of crosslinked polyethylene pipes, specifically including:

[0220] 1. Obtain crosslinking degree data for crosslinked polyethylene pipes at different crosslinking temperatures and times; specifically including:

[0221] Pipe sections are extruded using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe material.

[0222] Multiple samples were taken from the product of the pipe section extrusion molding and crosslinked at different temperatures and for different times under the same crosslinking medium conditions as the target crosslinked polyethylene pipe. The crosslinking medium was pure water, and the different crosslinking temperatures included 60℃, 70℃, 80℃, 90℃, and 100℃. The different crosslinking times included 6h, 8h, 10h, 12h, 14h, 16h, 18h, 20h, 22h, and 21h. The density of crosslinked polyethylene is lower than that of water, and the crosslinking process ensures that the water and the pipe are in full contact.

[0223] The degree of crosslinking of each crosslinked product was tested to obtain crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times. The results are shown in Table 1.

[0224] Table 1. Crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times.

[0225]

[0226] 2. Based on the crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times, determine the relationship between the crosslinking degree and crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures (e.g., Figure 3 (As shown), the results are as follows:

[0227] 60℃: Y = 0.77736X + 45.12381

[0228] 70℃: Y = 0.86232X + 48.66809

[0229] 80℃: Y = 0.68086X + 63.98818

[0230] 90℃: Y = 1.16198X + 63.66026

[0231] 100℃: Y = 1.13692X + 64.21729

[0232] In the formula, Y represents the degree of crosslinking (%), X represents the crosslinking time (h), and a i b i is the coefficient at the i-th crosslinking temperature.

[0233] 3. Based on the relationship between the degree of crosslinking and the crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures, the crosslinking time required for crosslinked polyethylene pipes to reach the crosslinking degree threshold of 70% at different crosslinking temperatures was determined, and the results are shown in Table 2.

[0234] Table 2 Time-temperature parameters at different temperatures

[0235]

[0236] 4. Based on the crosslinking time required for crosslinked polyethylene pipes to reach the crosslinking degree threshold at different crosslinking temperatures, determine the relationship between crosslinking temperature and crosslinking time when crosslinked polyethylene pipes reach the crosslinking degree threshold (e.g., Figure 4 (As shown), the results are as follows:

[0237] ln(1 / t)= -6970.30547·(1 / T)+17.34259

[0238] In the formula: T is the crosslinking temperature, in K; t is the crosslinking time when the degree of crosslinking reaches the crosslinking threshold, in h.

[0239] 5. Obtain the crosslinking temperature of the target crosslinked polyethylene pipe; the crosslinking temperature is 75℃.

[0240] 6. Using the crosslinking temperature of the target crosslinked polyethylene pipe and the relationship between crosslinking temperature and crosslinking time when the crosslinking degree threshold is reached, the crosslinking temperature is determined to be the crosslinking time t=14.69 h when the crosslinking degree reaches the crosslinking degree threshold under the crosslinking temperature condition of the target crosslinked polyethylene pipe. Based on the predicted crosslinking time, the appropriate crosslinking time of 14.69 h for the target crosslinked polyethylene pipe is determined. The target crosslinked polyethylene pipe is then crosslinked at a crosslinking temperature of 75℃ and a crosslinking time of 14.69 h.

[0241] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0242] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0243] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0244] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0245] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for controlling the degree of crosslinking in crosslinked polyethylene pipes, wherein, The method includes: Obtain crosslinking degree data of crosslinked polyethylene pipes at different crosslinking temperatures and times; Based on the crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times, the relationship between the crosslinking degree and crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures was determined. Based on the relationship between the degree of crosslinking and the crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures, the crosslinking time required for crosslinked polyethylene pipes to reach the crosslinking degree threshold at different crosslinking temperatures was determined. Based on the crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures to reach the crosslinking degree threshold, the relationship between crosslinking temperature and crosslinking time when crosslinked polyethylene pipes reach the crosslinking degree threshold is determined. Obtain the crosslinking temperature of the target crosslinked polyethylene pipe; By utilizing the crosslinking temperature of the target crosslinked polyethylene pipe and combining the relationship between the crosslinking temperature and crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold, a suitable crosslinking time for the target crosslinked polyethylene pipe is determined to regulate the crosslinking degree of the target crosslinked polyethylene pipe. Among these methods, the crosslinking temperature of the target crosslinked polyethylene pipe, combined with the relationship between the crosslinking temperature and crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold, is used to determine the appropriate crosslinking time for the target crosslinked polyethylene pipe, thereby controlling the crosslinking degree of the target crosslinked polyethylene pipe. By utilizing the crosslinking temperature of the target crosslinked polyethylene pipe and combining the relationship between crosslinking temperature and crosslinking time when the crosslinking degree threshold is reached, the crosslinking time corresponding to the crosslinking degree threshold under the crosslinking temperature condition of the target crosslinked polyethylene pipe is determined as the predicted crosslinking time. Based on the predicted crosslinking time, a suitable crosslinking time for the target crosslinked polyethylene pipe is determined to regulate the crosslinking degree of the target crosslinked polyethylene pipe.

2. The method according to claim 1, wherein, The appropriate crosslinking time for the target crosslinked polyethylene pipe is 0.9-1.1 times the predicted crosslinking time.

3. The method according to claim 1 or 2, wherein, The degree of crosslinking of the crosslinked polyethylene pipes obtained at different crosslinking temperatures and times was determined in the following manner: Pipe sections are extruded using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe material. Multiple samples were taken from the product of the pipe section extrusion molding and crosslinked at different temperatures and for different times under the same crosslinking medium as the target crosslinked polyethylene pipe. The crosslinking medium was pure water, the different crosslinking temperatures included at least 3 temperature points in the range of 60-100℃, and the different crosslinking times included at least 4 time periods in the range of 6-24h. The degree of crosslinking of each crosslinked product was tested to obtain crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times.

4. The method according to claim 3, wherein, The relationship between the degree of crosslinking and the crosslinking time of crosslinked polyethylene pipe at a certain crosslinking temperature is as follows: Y=a i X+b i In the formula, Y represents the degree of crosslinking (%), X represents the crosslinking time (h), and a i b i is the coefficient at the i-th crosslinking temperature.

5. The method according to claim 1 or 2, wherein, The cross-linking degree threshold is 65-80%.

6. The method according to claim 1 or 2, wherein, The relationship between crosslinking temperature and crosslinking time when crosslinked polyethylene pipes reach the crosslinking degree threshold is as follows: ln(1 / t) = -A·(1 / T) + B In the formula: T is the crosslinking temperature, in K; t is the crosslinking time when the degree of crosslinking reaches the crosslinking threshold, in h.

7. A method for evaluating the degree of crosslinking of crosslinked polyethylene pipes, wherein, The method includes: Obtain crosslinking degree data of crosslinked polyethylene pipes at different crosslinking temperatures and times; Based on the crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times, the relationship between the crosslinking degree and crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures was determined. Based on the relationship between the degree of crosslinking and the crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures, the crosslinking time required for crosslinked polyethylene pipes to reach the crosslinking degree threshold at different crosslinking temperatures was determined. Based on the crosslinking time of crosslinked polyethylene pipes at different crosslinking temperatures to reach the crosslinking degree threshold, the relationship between crosslinking temperature and crosslinking time when crosslinked polyethylene pipes reach the crosslinking degree threshold is determined. Obtain the crosslinking temperature and crosslinking time of the target crosslinked polyethylene pipe; The crosslinking degree of the target crosslinked polyethylene pipe is evaluated by using the crosslinking temperature and crosslinking time of the target crosslinked polyethylene pipe, combined with the relationship between crosslinking temperature and crosslinking time when the crosslinking degree threshold is reached. The evaluation of the crosslinking degree of the target crosslinked polyethylene pipe material includes utilizing the crosslinking temperature and crosslinking time, combined with the relationship between crosslinking temperature and crosslinking time when the crosslinking degree threshold is reached. By utilizing the crosslinking temperature of the target crosslinked polyethylene pipe and combining the relationship between crosslinking temperature and crosslinking time when the crosslinking degree threshold is reached, the crosslinking time corresponding to the crosslinking degree threshold under the crosslinking temperature condition of the target crosslinked polyethylene pipe is determined as the predicted crosslinking time. Based on the predicted crosslinking time and the crosslinking time of the target crosslinked polyethylene pipe, the crosslinking degree of the target crosslinked polyethylene pipe is evaluated to determine whether it is qualified.

8. The method according to claim 7, wherein, When the predicted crosslinking time is 0.9-1.1 times that of the target crosslinked polyethylene pipe, the crosslinking degree of the target crosslinked polyethylene pipe is qualified; otherwise, the crosslinking degree of the target crosslinked polyethylene pipe is unqualified.

9. The method according to claim 7 or 8, wherein, The degree of crosslinking of the crosslinked polyethylene pipes obtained at different crosslinking temperatures and times was determined in the following manner: Pipe sections are extruded using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe material. Multiple samples were taken from the product of the pipe section extrusion molding and cross-linked at different temperatures and times under the same cross-linking medium conditions as the target cross-linked polyethylene pipe. The degree of crosslinking of each crosslinked product was tested to obtain crosslinking degree data of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times. The different crosslinking temperatures include at least three temperature points selected within the range of 60-100℃; The different crosslinking times include at least four time periods within the range of 6-24 hours; The crosslinking medium is pure water.

10. The method according to claim 9, wherein, The relationship between the degree of crosslinking and the crosslinking time of crosslinked polyethylene pipe at a certain crosslinking temperature is as follows: Y=a i X+b i In the formula, Y represents the degree of crosslinking (%), X represents the crosslinking time (h), and a i b i is the coefficient at the i-th crosslinking temperature.

11. The method according to claim 7 or 8, wherein, The cross-linking degree threshold is 65-80%.

12. The method according to claim 7 or 8, wherein, The relationship between crosslinking temperature and crosslinking time when crosslinked polyethylene pipes reach the crosslinking degree threshold is as follows: ln(1 / t) = -A·(1 / T) + B In the formula: T is the crosslinking temperature, in K; t is the crosslinking time when the degree of crosslinking reaches the crosslinking threshold, in h.

13. A crosslinking degree control system for crosslinked polyethylene pipes, wherein, The system includes: First data acquisition module: used to acquire cross-linking degree data of cross-linked polyethylene pipes obtained at different cross-linking temperatures and times; The first fitting module is used to determine the relationship between the degree of crosslinking and the crosslinking time of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times. The second data acquisition module is used to determine the crosslinking time for crosslinked polyethylene pipes to reach the crosslinking degree threshold at different crosslinking temperatures, based on the relationship between the degree of crosslinking and the crosslinking time at different crosslinking temperatures. The second fitting module is used to determine the relationship between crosslinking temperature and crosslinking time when crosslinked polyethylene pipes reach the crosslinking degree threshold based on the crosslinking time at different crosslinking temperatures. The third data acquisition module is used to acquire the crosslinking temperature of the target crosslinked polyethylene pipe. Crosslinking time determination module: This module is used to determine the appropriate crosslinking time for the target crosslinked polyethylene pipe by utilizing the crosslinking temperature of the target crosslinked polyethylene pipe and combining the relationship between the crosslinking temperature and crosslinking time when the crosslinking degree threshold is reached. This allows for the control of the crosslinking degree of the target crosslinked polyethylene pipe. The crosslinking time determination module includes: The predicted crosslinking time determination submodule is used to determine the predicted crosslinking time by using the crosslinking temperature of the target crosslinked polyethylene pipe and the relationship between the crosslinking temperature and the crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold. The predicted crosslinking time is the crosslinking time when the crosslinking degree reaches the crosslinking degree threshold under the crosslinking temperature condition of the target crosslinked polyethylene pipe. Crosslinking time determination submodule: used to determine the appropriate crosslinking time for the target crosslinked polyethylene pipe based on the predicted crosslinking time, and to control the degree of crosslinking of the target crosslinked polyethylene pipe.

14. The system according to claim 13, wherein, The appropriate crosslinking time for the target crosslinked polyethylene pipe is 0.9-1.1 times the predicted crosslinking time.

15. The system according to claim 13 or 14, wherein, The relationship between the degree of crosslinking and the crosslinking time of crosslinked polyethylene pipe at a certain crosslinking temperature is as follows: Y=a i X+b i In the formula, Y represents the degree of crosslinking (%), X represents the crosslinking time (h), and a i b i is the coefficient at the i-th crosslinking temperature.

16. The system according to claim 13 or 14, wherein, The relationship between crosslinking temperature and crosslinking time when crosslinked polyethylene pipes reach the crosslinking degree threshold is as follows: ln(1 / t) = -A·(1 / T) + B In the formula: T is the crosslinking temperature, in K; t is the crosslinking time when the degree of crosslinking reaches the crosslinking threshold, in h.

17. A cross-linking degree evaluation system for cross-linked polyethylene pipes, wherein, The system includes: First data acquisition unit: used to acquire cross-linking degree data of cross-linked polyethylene pipes obtained at different cross-linking temperatures and times; The first fitting unit is used to determine the relationship between the degree of crosslinking and the crosslinking time of crosslinked polyethylene pipes obtained at different crosslinking temperatures and times. The second data acquisition unit is used to determine the crosslinking time for crosslinked polyethylene pipes to reach the crosslinking degree threshold at different crosslinking temperatures, based on the relationship between the degree of crosslinking and the crosslinking time at different crosslinking temperatures. The second fitting unit is used to determine the relationship between crosslinking temperature and crosslinking time when crosslinked polyethylene pipes reach the crosslinking degree threshold based on the crosslinking time at different crosslinking temperatures. The third data acquisition unit is used to acquire the crosslinking temperature and crosslinking time of the target crosslinked polyethylene pipe. Crosslinking degree evaluation unit: Used to evaluate the crosslinking degree of the target crosslinked polyethylene pipe by combining the crosslinking temperature and crosslinking time of the target crosslinked polyethylene pipe with the relationship between crosslinking temperature and crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold; The crosslinking degree evaluation unit includes: The predicted crosslinking time determination subunit is used to determine the predicted crosslinking time by using the crosslinking temperature of the target crosslinked polyethylene pipe and combining the relationship between the crosslinking temperature and the crosslinking time when the crosslinked polyethylene pipe reaches the crosslinking degree threshold. The predicted crosslinking time is the crosslinking time when the crosslinking degree reaches the crosslinking degree threshold under the crosslinking temperature condition of the target crosslinked polyethylene pipe. Crosslinking degree evaluation subunit: Used to evaluate whether the crosslinking degree of the target crosslinked polyethylene pipe is qualified based on the predicted crosslinking time and the crosslinking time of the target crosslinked polyethylene pipe.

18. The system according to claim 17, wherein, When the predicted crosslinking time is 0.9-1.1 times that of the target crosslinked polyethylene pipe, the crosslinking degree of the target crosslinked polyethylene pipe is qualified; otherwise, the crosslinking degree of the target crosslinked polyethylene pipe is unqualified.

19. The system according to claim 17 or 18, wherein, The relationship between the degree of crosslinking and the crosslinking time of crosslinked polyethylene pipe at a certain crosslinking temperature is as follows: Y=a i X+b i In the formula, Y represents the degree of crosslinking (%), X represents the crosslinking time (h), and a i b i is the coefficient at the i-th crosslinking temperature.

20. The system according to claim 17 or 18, wherein, The relationship between crosslinking temperature and crosslinking time when crosslinked polyethylene pipes reach the crosslinking degree threshold is as follows: ln(1 / t) = -A·(1 / T) + B In the formula: T is the crosslinking temperature, in K; t is the crosslinking time when the degree of crosslinking reaches the crosslinking threshold, in h.

21. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method for controlling the crosslinking degree of crosslinked polyethylene pipes according to any one of claims 1-6.

22. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method for evaluating the degree of crosslinking of crosslinked polyethylene pipes according to any one of claims 7-12.

23. A computer-readable storage medium storing a computer program that, when executed by a processor, implements the method for controlling the degree of crosslinking of crosslinked polyethylene pipes according to any one of claims 1-6.

24. A computer-readable storage medium storing a computer program that, when executed by a processor, implements the method for evaluating the degree of crosslinking of crosslinked polyethylene pipes according to any one of claims 7-12.

25. A computer program product comprising a computer program that, when executed by a processor, implements the method for controlling the degree of crosslinking of crosslinked polyethylene pipes according to any one of claims 1-6.

26. A computer program product comprising a computer program that, when executed by a processor, implements the method for evaluating the degree of crosslinking of crosslinked polyethylene pipes according to any one of claims 7-12.

Images