Method for regulating and controlling crosslinking degree of crosslinked polyethylene pipe and method for evaluating crosslinking degree

Abstract

The invention provides a cross-linking degree regulation and control method and a cross-linking degree evaluation method for a cross-linked polyethylene pipe. The cross-linking degree regulation and control method comprises the following steps: acquiring cross-linking degree data of a cross-linked polyethylene pipe at different cross-linking temperatures and different cross-linking times, determining a relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures, and further determining the cross-linking time when the cross-linked polyethylene pipe reaches a cross-linking degree threshold value at different cross-linking temperatures, determining the relationship between the crosslinking temperature and the crosslinking time when the crosslinking polyethylene pipe reaches the crosslinking degree threshold value; obtaining the cross-linking temperature of the target cross-linked polyethylene pipe; and determining the appropriate crosslinking time 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 the crosslinking time when the crosslinked polyethylene pipe reaches a crosslinking degree threshold value, and regulating the crosslinking degree of the target crosslinked polyethylene pipe.

Description

Technical Field

[0001] The invention relates to a method for regulating the cross-linking degree of a cross-linked polyethylene pipe and a method for evaluating the cross-linking degree of a cross-linked polyethylene pipe. Background Art

[0002] In recent years, the failure of ground carbon steel pipelines due to internal corrosion has occurred frequently during the development of oil fields, which has posed a severe challenge to the safety management of oil field sites, and corrosion control is urgent. In order to solve the above problems, a variety of composite structural pipes with thermoplastic linings have been developed and promoted in oil fields. With the increasingly complex service conditions of oil fields, more stringent service temperatures and media, in order to meet the production needs of oil fields, higher requirements are put forward for the long-term safe service of flexible composite pipes. The use of cross-linked polyethylene (PEX) instead of ordinary polyethylene (PE) as the lining material of flexible composite pipes can significantly improve the temperature resistance and oil and gas swelling resistance of the composite pipe lining under the premise of controllable raw material costs, and has been promoted in oil fields. In the cross-linking process of PE, linear or slightly branched polymers are converted into a network molecular structure through chemical substances or high-energy rays, and chemical bonds are established between molecules. The cross-linked PE not only improves heat resistance, wear resistance, and mechanical strength, but also improves environmental stress cracking resistance and creep resistance, and increases service life.

[0003] At present, the raw materials for producing PEX pipes are mainly silane cross-linked polyethylene (PEX-B), and the production equipment is mainly the pipe extrusion system. The raw materials of silane cross-linked polyethylene (PEX-B) are divided into A material and B material. A material is silane grafted PE, accounting for 95%, and B material is catalytic masterbatch, accounting for 5%. During the extrusion production, A and B materials are mixed and then extruded. After extrusion, PEX pipes are boiled and cross-linked. The temperature and time of boiling determine the cross-linking degree of PEX pipes. The cross-linking degree of PEX pipes is the key factor in improving their performance. In summary, regulating and evaluating the cross-linking degree of cross-linked polyethylene pipes is of great significance to the promotion and application of PEX pipes in oil fields. Summary of the invention

[0004] The purpose of the present invention is to provide a technical solution that can quickly and effectively achieve the cross-linking degree control and evaluation of cross-linked polyethylene pipes. In order to achieve the above purpose, the present invention provides the following ten technical solutions:

[0005] In a first aspect, the present invention provides a method for controlling the crosslinking degree of a cross-linked polyethylene pipe, wherein the method comprises:

[0006] Obtain the cross-linking degree data of cross-linked polyethylene pipes obtained at different cross-linking temperatures and different cross-linking times;

[0007] Based on the cross-linking degree data of cross-linked polyethylene pipes obtained at different cross-linking temperatures and different cross-linking times, the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipes at different cross-linking temperatures is determined;

[0008] Based on the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures, the cross-linking time for the cross-linked polyethylene pipe to reach the cross-linking degree threshold at different cross-linking temperatures is determined;

[0009] Based on the cross-linking time of cross-linked polyethylene pipes reaching the cross-linking degree threshold at different cross-linking temperatures, the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipes reach the cross-linking degree threshold is determined;

[0010] Obtaining the cross-linking temperature of the target cross-linked polyethylene pipe;

[0011] By using the cross-linking temperature of the target cross-linked polyethylene pipe and the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, the appropriate cross-linking time of the target cross-linked polyethylene pipe is determined to regulate the cross-linking degree of the target cross-linked polyethylene pipe.

[0012] According to a preferred embodiment of the first aspect, the crosslinking degree data of the crosslinked polyethylene pipe obtained at different crosslinking temperatures and different crosslinking times are determined by the following method:

[0013] Extrusion molding of the pipe segment is performed using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe;

[0014] A plurality of samples are taken from the product formed by extrusion of the pipe segment, and cross-linked at different cross-linking temperatures and different cross-linking times under the same cross-linking medium conditions as the target cross-linked polyethylene pipe;

[0015] The crosslinking degree of each crosslinked product is tested respectively, so as to obtain the crosslinking degree data of the crosslinked polyethylene pipes obtained at different crosslinking temperatures and different crosslinking times;

[0016] More preferably, the different cross-linking temperatures include at least 3 selected temperature points within the range of 60-100°C;

[0017] More preferably, the different cross-linking times include at least 4 time periods selected within the range of 6-24 hours;

[0018] More preferably, the cross-linking medium is pure water.

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

[0020] Y=a i X+b i

[0021] Wherein, Y is the degree of crosslinking, unit is %; X is the crosslinking time, unit is h; a i , b i is the coefficient at the i-th cross-linking temperature.

[0022] According to a preferred embodiment of the first aspect, the threshold cross-linking degree is 65-80% (eg 70%).

[0023] According to a preferred embodiment of the first aspect, the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold is:

[0024] ln(1 / t)=-A·(1 / T)+B

[0025] Wherein: T is the crosslinking temperature, unit K; t is the crosslinking time corresponding to when the crosslinking degree reaches the crosslinking degree threshold, unit h.

[0026] According to a preferred embodiment of the first aspect, using the cross-linking temperature of the target cross-linked polyethylene pipe, combined with the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, determining the appropriate cross-linking time of the target cross-linked polyethylene pipe to control the cross-linking degree of the target cross-linked polyethylene pipe includes:

[0027] By using the cross-linking temperature of the target cross-linked polyethylene pipe and the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, it is determined that the cross-linking time corresponding to the cross-linking degree reaching the cross-linking degree threshold under the condition that the cross-linking temperature is the cross-linking temperature of the target cross-linked polyethylene pipe is the predicted cross-linking time, and based on the predicted cross-linking time, the appropriate cross-linking time of the target cross-linked polyethylene pipe is determined to regulate the cross-linking degree of the target cross-linked polyethylene pipe;

[0028] Preferably, the appropriate cross-linking time of the target cross-linked polyethylene pipe is 0.9-1.1 times the predicted cross-linking time.

[0029] In a second aspect, the present invention provides a cross-linking degree control system for a cross-linked polyethylene pipe, wherein the system comprises:

[0030] The first data acquisition module is used to obtain the cross-linking degree data of the cross-linked polyethylene pipe obtained at different cross-linking temperatures and different cross-linking times;

[0031] The first fitting module is used to determine the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures based on the cross-linking degree data of the cross-linked polyethylene pipe obtained at different cross-linking temperatures and different cross-linking times;

[0032] The second data acquisition module is used to determine the cross-linking time for the cross-linked polyethylene pipe to reach the cross-linking degree threshold at different cross-linking temperatures based on the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures;

[0033] The second fitting module is used to determine the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold based on the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold at different cross-linking temperatures;

[0034] The third data acquisition module is used to obtain the cross-linking temperature of the target cross-linked polyethylene pipe;

[0035] Cross-linking time determination module: used to use the cross-linking temperature of the target cross-linked polyethylene pipe, combined with the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, to determine the appropriate cross-linking time of the target cross-linked polyethylene pipe to regulate the cross-linking degree of the target cross-linked polyethylene pipe.

[0036] According to a preferred embodiment of the second aspect, the crosslinking degree data of the crosslinked polyethylene pipe obtained at different crosslinking temperatures and different crosslinking times are determined by the following method:

[0037] Extrusion molding of the pipe segment is performed using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe;

[0038] A plurality of samples are taken from the product formed by extrusion of the pipe segment, and cross-linked at different cross-linking temperatures and different cross-linking times under the same cross-linking medium conditions as the target cross-linked polyethylene pipe;

[0039] The crosslinking degree of each crosslinked product is tested respectively, so as to obtain the crosslinking degree data of the crosslinked polyethylene pipes obtained at different crosslinking temperatures and different crosslinking times;

[0040] More preferably, the different cross-linking temperatures include at least 3 selected temperature points within the range of 60-100°C;

[0041] More preferably, the different cross-linking times include at least 4 time periods selected within the range of 6-24 hours;

[0042] More preferably, the cross-linking medium is pure water.

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

[0044] Y=a i X+b i

[0045] Wherein, Y is the degree of crosslinking, unit is %; X is the crosslinking time, unit is h; ai , b i is the coefficient at the i-th cross-linking temperature.

[0046] According to a preferred embodiment of the second aspect, the threshold cross-linking degree is 65-80% (eg 70%).

[0047] According to a preferred embodiment of the second aspect, the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold is:

[0048] ln(1 / t)=-A·(1 / T)+B

[0049] Wherein: T is the crosslinking temperature, unit K; t is the crosslinking time corresponding to when the crosslinking degree reaches the crosslinking degree threshold, unit h.

[0050] According to a preferred embodiment of the second aspect, the cross-linking time determination module comprises:

[0051] Predicted cross-linking time determination submodule: used to use the cross-linking temperature of the target cross-linked polyethylene pipe, combined with the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, to determine that the cross-linking time corresponding to the cross-linking degree reaching the cross-linking degree threshold under the condition that the cross-linking temperature is the cross-linking temperature of the target cross-linked polyethylene pipe is the predicted cross-linking time;

[0052] Cross-linking time determination submodule: used to determine the appropriate cross-linking time of the target cross-linked polyethylene pipe based on the predicted cross-linking time to regulate the cross-linking degree of the target cross-linked polyethylene pipe; preferably, the appropriate cross-linking time of the target cross-linked polyethylene pipe is 0.9-1.1 times the predicted cross-linking time.

[0053] In a third aspect, the present invention provides a computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method for controlling the degree of cross-linking of a cross-linked polyethylene pipe provided in the first aspect when executing the computer program.

[0054] In a fourth aspect, the present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the method for controlling the cross-linking degree of a cross-linked polyethylene pipe provided in the first aspect.

[0055] In a fifth aspect, the present invention provides a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the method for controlling the cross-linking degree of a cross-linked polyethylene pipe provided in the first aspect.

[0056] In a sixth aspect, the present invention provides a method for evaluating the degree of crosslinking of a crosslinked polyethylene pipe, wherein the method comprises:

[0057] Obtain the cross-linking degree data of cross-linked polyethylene pipes obtained at different cross-linking temperatures and different cross-linking times;

[0058] Based on the cross-linking degree data of cross-linked polyethylene pipes obtained at different cross-linking temperatures and different cross-linking times, the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipes at different cross-linking temperatures is determined;

[0059] Based on the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures, the cross-linking time for the cross-linked polyethylene pipe to reach the cross-linking degree threshold at different cross-linking temperatures is determined;

[0060] Based on the cross-linking time of cross-linked polyethylene pipes reaching the cross-linking degree threshold at different cross-linking temperatures, the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipes reach the cross-linking degree threshold is determined;

[0061] Obtaining the cross-linking temperature and cross-linking time of the target cross-linked polyethylene pipe;

[0062] The cross-linking degree of the target cross-linked polyethylene pipe is evaluated by using the cross-linking temperature and cross-linking time of the target cross-linked polyethylene pipe and combining the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold.

[0063] According to a preferred embodiment of the sixth aspect, the crosslinking degree data of the crosslinked polyethylene pipe obtained at different crosslinking temperatures and different crosslinking times are determined by the following method:

[0064] Extrusion molding of the pipe segment is performed using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe;

[0065] A plurality of samples are taken from the product formed by extrusion of the pipe segment, and cross-linked at different cross-linking temperatures and different cross-linking times under the same cross-linking medium conditions as the target cross-linked polyethylene pipe;

[0066] The crosslinking degree of each crosslinked product is tested respectively, so as to obtain the crosslinking degree data of the crosslinked polyethylene pipes obtained at different crosslinking temperatures and different crosslinking times;

[0067] More preferably, the different cross-linking temperatures include at least 3 selected temperature points within the range of 60-100°C;

[0068] More preferably, the different cross-linking times include at least 4 time periods selected within the range of 6-24 hours;

[0069] More preferably, the cross-linking medium is pure water.

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

[0071] Y=a i X+b i

[0072] Wherein, Y is the degree of crosslinking, unit is %; X is the crosslinking time, unit is h; a i 、b i is the coefficient at the i-th cross-linking temperature.

[0073] According to a preferred embodiment of the sixth aspect, the threshold cross-linking degree is 65-80% (eg 70%).

[0074] According to a preferred embodiment of the sixth aspect, the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold is:

[0075] ln(1 / t)=-A·(1 / T)+B

[0076] Wherein: T is the crosslinking temperature, unit K; t is the crosslinking time corresponding to when the crosslinking degree reaches the crosslinking degree threshold, unit h.

[0077] According to a preferred embodiment of the sixth aspect, using the crosslinking temperature and crosslinking time of the target crosslinked polyethylene pipe, combined with the relationship between the crosslinking temperature and the crosslinking time when the crosslinked polyethylene pipe reaches a crosslinking degree threshold, evaluating the crosslinking degree of the target crosslinked polyethylene pipe includes:

[0078] By using the cross-linking temperature of the target cross-linked polyethylene pipe and the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, it is determined that the cross-linking time corresponding to the cross-linking degree reaching the cross-linking degree threshold under the condition that the cross-linking temperature is the cross-linking temperature of the target cross-linked polyethylene pipe is the predicted cross-linking time. Based on the predicted cross-linking time and the cross-linking time of the target cross-linked polyethylene pipe, it is evaluated whether the cross-linking degree of the target cross-linked polyethylene pipe is qualified.

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

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

[0081] The first data acquisition unit is used to acquire the cross-linking degree data of the cross-linked polyethylene pipe obtained at different cross-linking temperatures and different cross-linking times;

[0082] The first fitting unit is used to determine the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures based on the cross-linking degree data of the cross-linked polyethylene pipe obtained at different cross-linking temperatures and different cross-linking times;

[0083] The second data acquisition unit is used to determine the cross-linking time for the cross-linked polyethylene pipe to reach a cross-linking degree threshold at different cross-linking temperatures based on the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures;

[0084] The second fitting unit is used to determine the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold value based on the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold value at different cross-linking temperatures;

[0085] The third data acquisition unit is used to obtain the cross-linking temperature and cross-linking time of the target cross-linked polyethylene pipe;

[0086] Crosslinking degree evaluation unit: used to evaluate the crosslinking degree of the target crosslinked polyethylene pipe by using the crosslinking temperature and crosslinking time 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.

[0087] According to a preferred embodiment of the seventh aspect, the crosslinking degree data of the crosslinked polyethylene pipe obtained at different crosslinking temperatures and different crosslinking times are determined by the following method:

[0088] Extrusion molding of the pipe segment is performed using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe;

[0089] A plurality of samples are taken from the product formed by extrusion of the pipe segment, and cross-linked at different cross-linking temperatures and different cross-linking times under the same cross-linking medium conditions as the target cross-linked polyethylene pipe;

[0090] The crosslinking degree of each crosslinked product is tested respectively, so as to obtain the crosslinking degree data of the crosslinked polyethylene pipes obtained at different crosslinking temperatures and different crosslinking times;

[0091] More preferably, the different cross-linking temperatures include at least 3 selected temperature points within the range of 60-100°C;

[0092] More preferably, the different cross-linking times include at least 4 time periods selected within the range of 6-24 hours;

[0093] More preferably, the cross-linking medium is pure water.

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

[0095] Y=a i X+b i

[0096] Wherein, Y is the degree of crosslinking, unit is %; X is the crosslinking time, unit is h; a i , b i is the coefficient at the i-th cross-linking temperature.

[0097] According to a preferred embodiment of the seventh aspect, the threshold cross-linking degree is 65-80% (eg 70%).

[0098] According to a preferred embodiment of the seventh aspect, the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold is:

[0099] ln(1 / t)=-A·(1 / T)+B

[0100] Wherein: T is the crosslinking temperature, unit K; t is the crosslinking time corresponding to when the crosslinking degree reaches the crosslinking degree threshold, unit h.

[0101] According to a preferred embodiment of the seventh aspect, the cross-linking degree evaluation module comprises:

[0102] Predicted cross-linking time determination subunit: used to use the cross-linking temperature of the target cross-linked polyethylene pipe, combined with the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, to determine that the cross-linking time corresponding to the cross-linking degree reaching the cross-linking degree threshold under the condition that the cross-linking temperature is the cross-linking temperature of the target cross-linked polyethylene pipe is the predicted cross-linking time;

[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, when the predicted crosslinking time is 0.9-1.1 times the crosslinking time 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.

[0104] In an eighth aspect, the present invention provides a computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method for evaluating the degree of cross-linking of a cross-linked polyethylene pipe provided in the sixth aspect when executing the computer program.

[0105] In a ninth aspect, the present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the method for evaluating the degree of cross-linking of a cross-linked polyethylene pipe provided in the sixth aspect.

[0106] In a tenth aspect, the present invention provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, it implements the method for evaluating the cross-linking degree of a cross-linked polyethylene pipe provided in the sixth aspect.

[0107] Compared with the prior art, the present invention has the following beneficial effects:

[0108] 1. The technical solution provided by the present invention determines the appropriate cross-linking time of the target cross-linked polyethylene pipe based on the correlation between temperature and time corresponding to the cross-linking degree threshold condition, thereby regulating the cross-linking of the target cross-linked polyethylene pipe. Utilizing the technical solution provided by the present invention, the determination of the appropriate cross-linking time at different cross-linking temperatures can be quickly achieved without repeatedly conducting cross-linking degree tests, thereby guiding the cross-linking of the target cross-linked polyethylene pipe to effectively ensure the cross-linking degree and thus the performance of the target cross-linked polyethylene pipe, which helps to reasonably arrange production, improve production efficiency, and achieve energy conservation and emission reduction.

[0109] 2. The technical solution provided by the present invention evaluates the cross-linking degree of the target cross-linked polyethylene pipe based on the correlation between temperature and time corresponding to the cross-linking degree threshold conditions, overcomes the traditional xylene extraction test method, can realize rapid evaluation of the cross-linking degree of the pipe, and reduce the risk of toxic and harmful substance operation and environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0110] Figure 1 The present invention is a flow chart of a method for controlling the cross-linking degree of a cross-linked polyethylene pipe in a specific implementation manner.

[0111] Figure 2 The present invention is a flow chart of a method for evaluating the degree of cross-linking of a cross-linked polyethylene pipe in a specific implementation manner.

[0112] Figure 3 1 is a relationship diagram between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures in Example 1.

[0113] Figure 4 This is a relationship diagram between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe in Example 1 reaches the cross-linking degree threshold. DETAILED DESCRIPTION

[0114] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Here, the exemplary 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 "include", "including", "have", "contain", etc. are all open terms, which mean including but not limited to. The descriptions with reference to the terms "one embodiment", "a specific embodiment", "some embodiments", "for example", etc. mean that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The order of steps involved in each embodiment is used to schematically illustrate the implementation of the present application, and the order of steps is not limited and can be appropriately adjusted as needed.

[0116] The embodiment of the present invention provides a method for controlling the crosslinking degree of a crosslinked polyethylene pipe, the process is as follows: Figure 1 As shown, the method comprises the following steps:

[0117] Step 101, obtaining cross-linking degree data of cross-linked polyethylene pipes obtained at different cross-linking temperatures and different cross-linking times;

[0118] Step 102, based on the cross-linking degree data of the cross-linked polyethylene pipe obtained at different cross-linking temperatures and different cross-linking times, determining the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures;

[0119] Step 103, based on the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures, determining the cross-linking time for the cross-linked polyethylene pipe at different cross-linking temperatures to reach a cross-linking degree threshold;

[0120] Step 104, determining the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold value based on the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold value at different cross-linking temperatures;

[0121] Step 105, obtaining the cross-linking temperature of the target cross-linked polyethylene pipe;

[0122] Step 106, 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 a crosslinking degree threshold, determine the appropriate crosslinking time for the target crosslinked polyethylene pipe to control the crosslinking degree of the target crosslinked polyethylene pipe.

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

[0124] Extrusion molding of the pipe segment is performed using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe;

[0125] A plurality of samples are taken from the product formed by extrusion of the pipe segment, and cross-linked at different cross-linking temperatures and different cross-linking times under the same cross-linking medium conditions as the target cross-linked polyethylene pipe;

[0126] The crosslinking degree of each crosslinked product is tested respectively, so as to obtain the crosslinking degree data of the crosslinked polyethylene pipes obtained at different crosslinking temperatures and different crosslinking times;

[0127] Further, the different cross-linking temperatures include at least 3 temperature points selected within the range of 60-100°C;

[0128] Further, the different cross-linking times include at least 4 time periods selected within the range of 6-24 hours;

[0129] Furthermore, the cross-linking medium is pure water.

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

[0131] Y=a i X+b i

[0132] Wherein, Y is the degree of crosslinking, unit is %; X is the crosslinking time, unit is h; a i , b i is the coefficient at the i-th cross-linking temperature.

[0133] In one embodiment, in step 103, the connection degree threshold is 65-80% (eg, 70%).

[0134] In one embodiment, in step 104, when the cross-linked polyethylene pipe reaches a cross-linking degree threshold, the relationship between the cross-linking temperature and the cross-linking time is:

[0135] ln(1 / t)=-A·(1 / T)+B

[0136] Wherein: T is the crosslinking temperature, unit K; t is the crosslinking time corresponding to when the crosslinking degree reaches the crosslinking degree threshold, unit h.

[0137] In one embodiment, step 106 includes:

[0138] By using the cross-linking temperature of the target cross-linked polyethylene pipe and the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, it is determined that the cross-linking time corresponding to the cross-linking degree reaching the cross-linking degree threshold under the condition that the cross-linking temperature is the cross-linking temperature of the target cross-linked polyethylene pipe is the predicted cross-linking time, and the appropriate cross-linking time of the target cross-linked polyethylene pipe is determined based on the predicted cross-linking time;

[0139] Furthermore, the appropriate cross-linking time of the target cross-linked polyethylene pipe is 0.9-1.1 times the predicted cross-linking time.

[0140] The embodiment of the present invention provides a method for evaluating the crosslinking degree of a crosslinked polyethylene pipe, the process is as follows: Figure 2 As shown, the method comprises the following steps:

[0141] Step 201, obtaining cross-linking degree data of cross-linked polyethylene pipes obtained at different cross-linking temperatures and different cross-linking times;

[0142] Step 202, based on the cross-linking degree data of the cross-linked polyethylene pipe obtained at different cross-linking temperatures and different cross-linking times, determining the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures;

[0143] Step 203, based on the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures, determining the cross-linking time for the cross-linked polyethylene pipe at different cross-linking temperatures to reach a cross-linking degree threshold;

[0144] Step 204, determining the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold value based on the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold value at different cross-linking temperatures;

[0145] Step 205, obtaining the cross-linking temperature and cross-linking time of the target cross-linked polyethylene pipe;

[0146] Step 206 , using the crosslinking temperature and crosslinking time of the target crosslinked polyethylene pipe and combining the relationship between the crosslinking temperature and the crosslinking time when the crosslinked polyethylene pipe reaches a crosslinking degree threshold, evaluate the crosslinking degree of the target crosslinked polyethylene pipe.

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

[0148] Extrusion molding of the pipe segment is performed using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe;

[0149] A plurality of samples are taken from the product formed by extrusion of the pipe segment, and cross-linked at different cross-linking temperatures and different cross-linking times under the same cross-linking medium conditions as the target cross-linked polyethylene pipe;

[0150] The crosslinking degree of each crosslinked product is tested respectively, so as to obtain the crosslinking degree data of the crosslinked polyethylene pipes obtained at different crosslinking temperatures and different crosslinking times;

[0151] Further, the different cross-linking temperatures include at least 3 temperature points selected within the range of 60-100°C;

[0152] Further, the different cross-linking times include at least 4 time periods selected within the range of 6-24 hours;

[0153] Furthermore, the cross-linking medium is pure water.

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

[0155] Y=a i X+b i

[0156] Wherein, Y is the degree of crosslinking, unit is %; X is the crosslinking time, unit is h; a i 、b i is the coefficient at the i-th cross-linking temperature.

[0157] In one embodiment, in step 203, the connection degree threshold is 65-80% (eg, 70%).

[0158] In one embodiment, in step 204, when the cross-linked polyethylene pipe reaches a cross-linking degree threshold, the relationship between the cross-linking temperature and the cross-linking time is:

[0159] ln(1 / t)=-A·(1 / T)+B

[0160] Wherein: T is the crosslinking temperature, unit K; t is the crosslinking time corresponding to when the crosslinking degree reaches the crosslinking degree threshold, unit h.

[0161] In one embodiment, step 206 includes:

[0162] By using the cross-linking temperature of the target cross-linked polyethylene pipe and the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, it is determined that the cross-linking time corresponding to the cross-linking degree reaching the cross-linking degree threshold under the condition that the cross-linking temperature is the cross-linking temperature of the target cross-linked polyethylene pipe is the predicted cross-linking time. Based on the predicted cross-linking time and the cross-linking time of the target cross-linked polyethylene pipe, it is evaluated whether the cross-linking degree of the target cross-linked polyethylene pipe is qualified.

[0163] Further, when the predicted cross-linking time is 0.9-1.1 times the cross-linking time of the target cross-linked polyethylene pipe, the cross-linking degree of the target cross-linked polyethylene pipe is qualified; otherwise, the cross-linking degree of the target cross-linked polyethylene pipe is unqualified.

[0164] The embodiment of the present invention also provides a cross-linking degree control system for cross-linked polyethylene pipes, as described in the following embodiments. Since the principle of solving the problem by the device is similar to the cross-linking degree control method for cross-linked polyethylene pipes, the implementation of the device can refer to the implementation of the cross-linking degree control method for cross-linked polyethylene pipes, and the repeated parts will not be repeated. The cross-linking degree control system for cross-linked polyethylene pipes provided by the embodiment of the present invention includes:

[0165] The first data acquisition module 301 is used to acquire the cross-linking degree data of the cross-linked polyethylene pipe obtained at different cross-linking temperatures and different cross-linking times;

[0166] The first fitting module 302 is used to determine the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures based on the cross-linking degree data of the cross-linked polyethylene pipe obtained at different cross-linking temperatures and different cross-linking times;

[0167] The second data acquisition module 303 is used to determine the cross-linking time for the cross-linked polyethylene pipe to reach the cross-linking degree threshold at different cross-linking temperatures based on the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures;

[0168] The second fitting module 304 is used to determine the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold value based on the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold value at different cross-linking temperatures;

[0169] The third data acquisition module 305 is used to obtain the cross-linking temperature of the target cross-linked polyethylene pipe;

[0170] The cross-linking time determination module 306 is used to determine the appropriate cross-linking time of the target cross-linked polyethylene pipe by using the cross-linking temperature of the target cross-linked polyethylene pipe and the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, so as to control the cross-linking degree of the target cross-linked polyethylene pipe.

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

[0172] Extrusion molding of the pipe segment is performed using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe;

[0173] A plurality of samples are taken from the product formed by extrusion of the pipe segment, and cross-linked at different cross-linking temperatures and different cross-linking times under the same cross-linking medium conditions as the target cross-linked polyethylene pipe;

[0174] The crosslinking degree of each crosslinked product is tested respectively, so as to obtain the crosslinking degree data of the crosslinked polyethylene pipes obtained at different crosslinking temperatures and different crosslinking times;

[0175] Further, the different cross-linking temperatures include at least 3 temperature points selected within the range of 60-100°C;

[0176] Further, the different cross-linking times include at least 4 time periods selected within the range of 6-24 hours;

[0177] Furthermore, the cross-linking medium is pure water.

[0178] In one embodiment, in the first fitting module 302, the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at a certain cross-linking temperature is:

[0179] Y=a i X+b i

[0180] Wherein, Y is the degree of crosslinking, unit is %; X is the crosslinking time, unit is h; a i 、b i is the coefficient at the i-th cross-linking temperature.

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

[0182] In one embodiment, in the second fitting module 304, the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold is:

[0183] ln(1 / t)=-A·(1 / T)+B

[0184] Wherein: T is the crosslinking temperature, unit K; t is the crosslinking time corresponding to when the crosslinking degree reaches the crosslinking degree threshold, unit h.

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

[0186] Predicted cross-linking time determination submodule 3061: used to use the cross-linking temperature of the target cross-linked polyethylene pipe and the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, and determine that the cross-linking time corresponding to the cross-linking degree reaching the cross-linking degree threshold under the condition that the cross-linking temperature is the cross-linking temperature of the target cross-linked polyethylene pipe is the predicted cross-linking time;

[0187] The cross-linking time determination submodule 3062 is used to determine the appropriate cross-linking time of the target cross-linked polyethylene pipe based on the predicted cross-linking time; further, the appropriate cross-linking time of the target cross-linked polyethylene pipe is 0.9-1.1 times of the predicted cross-linking time.

[0188] The embodiment of the present invention also provides a cross-linking degree evaluation system for cross-linked polyethylene pipes, as described in the following embodiment. Since the principle of solving the problem by the device is similar to the cross-linking degree evaluation method for cross-linked polyethylene pipes, the implementation of the device can refer to the implementation of the cross-linking degree evaluation method for cross-linked polyethylene pipes, and the repeated parts will not be repeated. The cross-linking degree evaluation system for cross-linked polyethylene pipes provided by the embodiment of the present invention includes:

[0189] The first data acquisition unit 401 is used to acquire the cross-linking degree data of the cross-linked polyethylene pipe obtained at different cross-linking temperatures and different cross-linking times;

[0190] The first fitting unit 402 is used to determine the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures based on the cross-linking degree data of the cross-linked polyethylene pipe obtained at different cross-linking temperatures and different cross-linking times;

[0191] The second data acquisition unit 403 is used to determine the cross-linking time for the cross-linked polyethylene pipe to reach a cross-linking degree threshold at different cross-linking temperatures based on the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures;

[0192] The second fitting unit 404 is used to determine the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold value based on the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold value at different cross-linking temperatures;

[0193] The third data acquisition unit 405 is used to acquire the cross-linking temperature and cross-linking time of the target cross-linked polyethylene pipe;

[0194] The crosslinking degree evaluation unit 406 is used to evaluate the crosslinking degree of the target crosslinked polyethylene pipe 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.

[0195] In one embodiment, the cross-linking degree data of the cross-linked polyethylene pipe obtained at different cross-linking temperatures and different cross-linking times in the first data acquisition unit 401 can be determined in the following manner:

[0196] Extrusion molding of the pipe segment is performed using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe;

[0197] A plurality of samples are taken from the product formed by extrusion of the pipe segment, and cross-linked at different cross-linking temperatures and different cross-linking times under the same cross-linking medium conditions as the target cross-linked polyethylene pipe;

[0198] The crosslinking degree of each crosslinked product is tested respectively, so as to obtain the crosslinking degree data of the crosslinked polyethylene pipes obtained at different crosslinking temperatures and different crosslinking times;

[0199] Further, the different cross-linking temperatures include at least 3 temperature points selected within the range of 60-100°C;

[0200] Further, the different cross-linking times include at least 4 time periods selected within the range of 6-24 hours;

[0201] Furthermore, the cross-linking medium is pure water.

[0202] In one embodiment, in the first fitting unit 402, the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at a certain cross-linking temperature is:

[0203] Y=a i X+b i

[0204] Wherein, Y is the degree of crosslinking, unit is %; X is the crosslinking time, unit is h; a i , b i is the coefficient at the i-th cross-linking temperature.

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

[0206] In one embodiment, in the second fitting unit 404, the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold is:

[0207] ln(1 / t)=-A·(1 / T)+B

[0208] Wherein: T is the crosslinking temperature, unit K; t is the crosslinking time corresponding to when the crosslinking degree reaches the crosslinking degree threshold, unit h.

[0209] In one embodiment, the crosslinking time determination unit 406 includes:

[0210] Predicted cross-linking time determination subunit 4061: used to use the cross-linking temperature of the target cross-linked polyethylene pipe and the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, and determine that the cross-linking time corresponding to the cross-linking degree reaching the cross-linking degree threshold under the condition that the cross-linking temperature is the cross-linking temperature of the target cross-linked polyethylene pipe is the predicted cross-linking time;

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

[0212] An embodiment of the present invention further 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, the above-mentioned method for controlling the cross-linking degree of a cross-linked polyethylene pipe is implemented.

[0213] An embodiment of the present invention further 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, the above-mentioned method for evaluating the cross-linking degree of cross-linked polyethylene pipe is implemented.

[0214] An embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for controlling the cross-linking degree of a cross-linked polyethylene pipe is implemented.

[0215] An embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for evaluating the cross-linking degree of a cross-linked polyethylene pipe is implemented.

[0216] An embodiment of the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the method for controlling the cross-linking degree of a cross-linked polyethylene pipe is implemented.

[0217] An embodiment of the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the method for evaluating the cross-linking degree of a cross-linked polyethylene pipe is implemented.

[0218] Embodiment 1:

[0219] This embodiment provides a method for controlling the crosslinking degree of a cross-linked polyethylene pipe, which specifically includes:

[0220] 1. Obtain the cross-linking degree data of cross-linked polyethylene pipes obtained at different cross-linking temperatures and different cross-linking times; specifically including:

[0221] Extrusion molding of the pipe segment is performed using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe;

[0222] A plurality of samples are taken from the product formed by extrusion of the pipe segment, and cross-linked at different cross-linking temperatures and different cross-linking times are respectively performed under the same cross-linking medium conditions as the target cross-linked polyethylene pipe; wherein the cross-linking medium is pure water, the different cross-linking temperatures include 60°C, 70°C, 80°C, 90°C, and 100°C, and the different cross-linking times include 6h, 8h, 10h, 12h, 14h, 16h, 18h, 20h, 22h, and 21h, and the density of the cross-linked polyethylene is lower than that of water, and the water is ensured to be in full contact with the pipe during the cross-linking process;

[0223] The crosslinking degrees of the products obtained after each crosslinking were tested respectively, so as to obtain the crosslinking degree data of the crosslinked polyethylene pipes obtained at different crosslinking temperatures and different crosslinking times. The results are shown in Table 1.

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

[0225]

[0226]

[0227] 2. Based on the cross-linking degree data of cross-linked polyethylene pipes obtained at different cross-linking temperatures and different cross-linking times, determine the relationship between the cross-linking degree and cross-linking time of cross-linked polyethylene pipes at different cross-linking temperatures (e.g. Figure 3 The result is as follows:

[0228] 60°C: Y = 0.77736X + 45.12381

[0229] 70℃: Y=0.86232X+48.66809

[0230] 80℃: Y=0.68086X+63.98818

[0231] 90℃: Y=1.16198X+63.66026

[0232] 100℃:Y=1.13692X+64.21729

[0233] Wherein, Y is the degree of crosslinking, unit is %; X is the crosslinking time, unit is h; a i 、b i is the coefficient at the i-th cross-linking temperature.

[0234] 3. Based on the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures, the cross-linking time for the cross-linked polyethylene pipe to reach a cross-linking degree threshold of 70% at different cross-linking temperatures was determined. The results are shown in Table 2.

[0235] Table 2 Time-temperature parameters at different temperatures

[0236]

[0237] 4. Based on the cross-linking time of cross-linked polyethylene pipes reaching the cross-linking degree threshold at different cross-linking temperatures, determine the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold (such as Figure 4 The result is as follows:

[0238] ln(1 / t)=-6970.30547·(1 / T)+17.34259

[0239] Wherein: T is the crosslinking temperature, unit K; t is the crosslinking time corresponding to when the crosslinking degree reaches the crosslinking degree threshold, unit h.

[0240] 5. Obtain the cross-linking temperature of the target cross-linked polyethylene pipe; the cross-linking temperature is 75°C.

[0241] 6. Using the cross-linking temperature of the target cross-linked polyethylene pipe and the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, determine that the cross-linking temperature is the cross-linking temperature of the target cross-linked polyethylene pipe and the corresponding cross-linking time t = 14.69h when the cross-linking degree reaches the cross-linking degree threshold, which is the predicted cross-linking time. Based on the predicted cross-linking time, determine the appropriate cross-linking time of 14.69h for the target cross-linked polyethylene pipe, and cross-link the target cross-linked polyethylene pipe at a cross-linking temperature of 75°C and a cross-linking time of 14.69h.

[0242] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented 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.

[0243] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1A device that provides the functions specified in a block or multiple blocks.

[0244] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0245] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0246] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is 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 in the scope of protection of the present invention.

Claims

1. A method for controlling the crosslinking degree of a crosslinked polyethylene pipe, wherein: The method includes: Obtain the cross-linking degree data of cross-linked polyethylene pipes obtained at different cross-linking temperatures and different cross-linking times; Based on the cross-linking degree data of cross-linked polyethylene pipes obtained at different cross-linking temperatures and different cross-linking times, the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipes at different cross-linking temperatures is determined; Based on the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures, the cross-linking time for the cross-linked polyethylene pipe to reach the cross-linking degree threshold at different cross-linking temperatures is determined; Based on the cross-linking time of cross-linked polyethylene pipes reaching the cross-linking degree threshold at different cross-linking temperatures, the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipes reach the cross-linking degree threshold is determined; Obtaining the cross-linking temperature of the target cross-linked polyethylene pipe; By using the cross-linking temperature of the target cross-linked polyethylene pipe and the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, the appropriate cross-linking time of the target cross-linked polyethylene pipe is determined to regulate the cross-linking degree of the target cross-linked polyethylene pipe.

2. The method according to claim 1, wherein: By using the cross-linking temperature of the target cross-linked polyethylene pipe and combining the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, the appropriate cross-linking time of the target cross-linked polyethylene pipe is determined to control the cross-linking degree of the target cross-linked polyethylene pipe, including: By using the cross-linking temperature of the target cross-linked polyethylene pipe and the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, it is determined that the cross-linking time corresponding to the cross-linking degree reaching the cross-linking degree threshold under the condition that the cross-linking temperature is the cross-linking temperature of the target cross-linked polyethylene pipe is the predicted cross-linking time, and based on the predicted cross-linking time, the appropriate cross-linking time of the target cross-linked polyethylene pipe is determined to regulate the cross-linking degree of the target cross-linked polyethylene pipe; Preferably, the appropriate cross-linking time of the target cross-linked polyethylene pipe is 0.9-1.1 times the predicted cross-linking time.

3. A method for evaluating the crosslinking degree of a crosslinked polyethylene pipe, wherein: The method includes: Obtain the cross-linking degree data of cross-linked polyethylene pipes obtained at different cross-linking temperatures and different cross-linking times; Based on the cross-linking degree data of cross-linked polyethylene pipes obtained at different cross-linking temperatures and different cross-linking times, the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipes at different cross-linking temperatures is determined; Based on the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures, the cross-linking time for the cross-linked polyethylene pipe to reach the cross-linking degree threshold at different cross-linking temperatures is determined; Based on the cross-linking time of cross-linked polyethylene pipes reaching the cross-linking degree threshold at different cross-linking temperatures, the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipes reach the cross-linking degree threshold is determined; Obtaining the cross-linking temperature and cross-linking time of the target cross-linked polyethylene pipe; The cross-linking degree of the target cross-linked polyethylene pipe is evaluated by using the cross-linking temperature and cross-linking time of the target cross-linked polyethylene pipe and combining the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold.

4. The method according to claim 3, wherein: Using the cross-linking temperature and cross-linking time of the target cross-linked polyethylene pipe, combined with the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, the cross-linking degree evaluation of the target cross-linked polyethylene pipe includes: By using the cross-linking temperature of the target cross-linked polyethylene pipe and the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, it is determined that the cross-linking time corresponding to the cross-linking degree reaching the cross-linking degree threshold under the condition that the cross-linking temperature is the cross-linking temperature of the target cross-linked polyethylene pipe is the predicted cross-linking time. Based on the predicted cross-linking time and the cross-linking time of the target cross-linked polyethylene pipe, it is evaluated whether the cross-linking degree of the target cross-linked polyethylene pipe is qualified. Preferably, when the predicted cross-linking time is 0.9-1.1 times the cross-linking time of the target cross-linked polyethylene pipe, the cross-linking degree of the target cross-linked polyethylene pipe is qualified; otherwise, the cross-linking degree of the target cross-linked polyethylene pipe is unqualified.

5. The method according to any one of claims 1 to 4, wherein: The crosslinking degree data of the crosslinked polyethylene pipes obtained at different crosslinking temperatures and different crosslinking times are determined by the following method: Extrusion molding of the pipe segment is performed using the same silane cross-linked polyethylene raw material as the target cross-linked polyethylene pipe; A plurality of samples are taken from the product formed by extrusion of the pipe segment, and cross-linked at different cross-linking temperatures and different cross-linking times under the same cross-linking medium conditions as the target cross-linked polyethylene pipe; The crosslinking degree of each crosslinked product is tested respectively, so as to obtain the crosslinking degree data of the crosslinked polyethylene pipes obtained at different crosslinking temperatures and different crosslinking times; Preferably, the different cross-linking temperatures include at least 3 temperature points selected within the range of 60-100°C; Preferably, the different cross-linking times include at least 4 time periods selected within the range of 6-24 hours; Preferably, the cross-linking medium is pure water.

6. The method according to any one of claims 1 to 4, wherein: The relationship between the cross-linking degree and cross-linking time of cross-linked polyethylene pipe at a certain cross-linking temperature is: Y=a i X+b i Wherein, Y is the degree of crosslinking, unit is %; X is the crosslinking time, unit is h; a i , b i is the coefficient at the i-th cross-linking temperature.

7. The method according to any one of claims 1 to 4, wherein: The cross-linking threshold is 65-80%.

8. The method according to any one of claims 1 to 4, wherein: When the cross-linked polyethylene pipe reaches the cross-linking degree threshold, the relationship between the cross-linking temperature and the cross-linking time is: ln(1 / t)=-A·(1 / T)+B Wherein: T is the crosslinking temperature, unit K; t is the crosslinking time corresponding to when the crosslinking degree reaches the crosslinking degree threshold, unit h.

9. A cross-linking degree control system for cross-linked polyethylene pipes, wherein: The system includes: The first data acquisition module is used to obtain the cross-linking degree data of the cross-linked polyethylene pipe obtained at different cross-linking temperatures and different cross-linking times; The first fitting module is used to determine the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures based on the cross-linking degree data of the cross-linked polyethylene pipe obtained at different cross-linking temperatures and different cross-linking times; The second data acquisition module is used to determine the cross-linking time for the cross-linked polyethylene pipe to reach the cross-linking degree threshold at different cross-linking temperatures based on the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures; The second fitting module is used to determine the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold based on the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold at different cross-linking temperatures; The third data acquisition module is used to obtain the cross-linking temperature of the target cross-linked polyethylene pipe; Cross-linking time determination module: used to use the cross-linking temperature of the target cross-linked polyethylene pipe, combined with the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, to determine the appropriate cross-linking time of the target cross-linked polyethylene pipe to regulate the cross-linking degree of the target cross-linked polyethylene pipe.

10. The system according to claim 9, wherein: The cross-linking time determination module includes: Predicted cross-linking time determination submodule: used to use the cross-linking temperature of the target cross-linked polyethylene pipe, combined with the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, to determine that the cross-linking time corresponding to the cross-linking degree reaching the cross-linking degree threshold under the condition that the cross-linking temperature is the cross-linking temperature of the target cross-linked polyethylene pipe is the predicted cross-linking time; Cross-linking time determination submodule: used to determine the appropriate cross-linking time of the target cross-linked polyethylene pipe based on the predicted cross-linking time to regulate the cross-linking degree of the target cross-linked polyethylene pipe; preferably, the appropriate cross-linking time of the target cross-linked polyethylene pipe is 0.9-1.1 times the predicted cross-linking time.

11. A system for evaluating the crosslinking degree of crosslinked polyethylene pipes, wherein: The system includes: The first data acquisition unit is used to acquire the cross-linking degree data of the cross-linked polyethylene pipe obtained at different cross-linking temperatures and different cross-linking times; The first fitting unit is used to determine the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures based on the cross-linking degree data of the cross-linked polyethylene pipe obtained at different cross-linking temperatures and different cross-linking times; The second data acquisition unit is used to determine the cross-linking time for the cross-linked polyethylene pipe to reach a cross-linking degree threshold at different cross-linking temperatures based on the relationship between the cross-linking degree and the cross-linking time of the cross-linked polyethylene pipe at different cross-linking temperatures; The second fitting unit is used to determine the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold value based on the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold value at different cross-linking temperatures; The third data acquisition unit is used to obtain the cross-linking temperature and cross-linking time of the target cross-linked polyethylene pipe; Crosslinking degree evaluation unit: used to evaluate the crosslinking degree of the target crosslinked polyethylene pipe by using the crosslinking temperature and crosslinking time 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.

12. The system according to claim 11, wherein: The cross-linking evaluation module includes: Predicted cross-linking time determination subunit: used to use the cross-linking temperature of the target cross-linked polyethylene pipe, combined with the relationship between the cross-linking temperature and the cross-linking time when the cross-linked polyethylene pipe reaches the cross-linking degree threshold, to determine that the cross-linking time corresponding to the cross-linking degree reaching the cross-linking degree threshold under the condition that the cross-linking temperature is the cross-linking temperature of the target cross-linked polyethylene pipe is the predicted cross-linking time; 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, when the predicted crosslinking time is 0.9-1.1 times the crosslinking time 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.

13. The system according to any one of claims 9 to 12, wherein: The relationship between the cross-linking degree and cross-linking time of cross-linked polyethylene pipe at a certain cross-linking temperature is: Y=a i X+b i Wherein, Y is the degree of crosslinking, unit is %; X is the crosslinking time, unit is h; a i , b i is the coefficient at the i-th cross-linking temperature.

14. The system according to any one of claims 9 to 12, wherein: When the cross-linked polyethylene pipe reaches the cross-linking degree threshold, the relationship between the cross-linking temperature and the cross-linking time is: ln(1 / t)=-A·(1 / T)+B Wherein: T is the crosslinking temperature, unit K; t is the crosslinking time corresponding to when the crosslinking degree reaches the crosslinking degree threshold, unit h.

15. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method for controlling the cross-linking degree of a cross-linked polyethylene pipe or the method for evaluating the cross-linking degree of a cross-linked polyethylene pipe according to any one of claims 1 to 8 is implemented.

16. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the method for controlling the cross-linking degree of a cross-linked polyethylene pipe or the method for evaluating the cross-linking degree of a cross-linked polyethylene pipe according to any one of claims 1 to 8.

17. A computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the method for controlling the crosslinking degree of a crosslinked polyethylene pipe or the method for evaluating the crosslinking degree of a crosslinked polyethylene pipe according to any one of claims 1 to 8 is implemented.

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