Manufacturing process and manufacturing device of steel-plastic composite pipe with steel connecting piece

Abstract

The invention relates to the technical field of composite pipe manufacturing, and particularly discloses a manufacturing process and device of a steel-plastic composite pipe with a steel connecting piece, the steel-plastic composite pipe comprises a bottom composite material layer, a middle steel belt layer and an outer composite material layer, and the process comprises the steps that physical parameters of the steel connecting piece are obtained; performing surface stripping treatment on the steel-plastic composite pipe based on the physical parameters to obtain a stripped composite pipe; configuring a cooling support device; a cooling supporting device is embedded into the stripped composite pipe, the outer diameter of the cooling supporting device is matched with the inner diameter of the stripped composite pipe, and the embedded position of the cooling supporting device corresponds to the welding position of the steel connecting piece; welding a steel connecting piece to the end part of the stripped composite pipe to obtain a welded composite pipe; and performing sealing treatment on the welded composite pipe to generate a new steel-plastic composite pipe. According to the actual physical characteristics and use requirements of an existing steel-plastic composite pipe, the connecting technology is improved, and therefore the actual use requirements are met.

Description

Technical Field

[0001] The invention relates to the technical field of composite pipe manufacturing, and in particular to a manufacturing process of a steel-plastic composite pipe with a steel connector and a manufacturing device of a steel-plastic composite pipe with a steel connector. Background Art

[0002] During underground operations, the corrosive environment often exists, which causes great corrosion to metal pipes, greatly reducing their service life and greatly increasing their damage rate. Although plastic pipes have good corrosion resistance, when the operating depth reaches a certain level, the plastic pipes will be abnormally stretched or even broken because their own weight is greater than their bearing capacity, and therefore cannot meet actual needs.

[0003] Based on this, technicians proposed the use of steel-plastic composite pipes to overcome the above two technical problems at the same time. In the use of existing plastic-steel composite pipes, when the underground drilling depth is greater than the length of a section of plastic-steel composite pipe, it is necessary to connect multiple sections of plastic-steel composite pipes on site into a longer pipe to meet actual use needs. Specifically, the two sections of steel-plastic composite pipes are connected at the end, and the composite materials are fused together by heating to form a longer pipe; or after cutting off a section of steel-plastic composite pipe (which will destroy the sealing layer of the pipe mouth), its end is bolted to the steel flange, and another steel-plastic composite pipe is bolted to the other end of the steel flange to assemble into a longer pipe, and then the pipe mouth is sealed again.

[0004] However, in actual application, since the steel belt and the composite material in the steel-plastic composite pipe are not the same material, when the drilling depth reaches a certain level, the tensile deformation of the composite material due to its own weight will be much greater than that of the steel belt, and may even cause tearing, thereby affecting the airtightness of the steel-plastic composite pipe and causing damage. After the underground liquid enters the inner layer of the steel-plastic composite pipe, it will corrode the steel belt, reducing its service life and making it unable to meet actual needs. Summary of the invention

[0005] In order to overcome the above-mentioned technical problems existing in the prior art, an embodiment of the present invention provides a manufacturing process and a manufacturing device for a steel-plastic composite pipe with a steel connector, by improving the connection process of the existing steel-plastic composite pipe according to its actual physical characteristics and usage requirements, thereby meeting the actual usage requirements.

[0006] In order to achieve the above-mentioned purpose, an embodiment of the present invention provides a manufacturing process for a steel-plastic composite pipe with a steel connector, wherein the steel-plastic composite pipe includes a bottom composite material layer, an intermediate steel belt layer and an outer composite material layer, and the manufacturing process includes: obtaining physical parameters of the steel connector; performing surface stripping treatment on the steel-plastic composite pipe based on the physical parameters to obtain a stripped composite pipe; configuring a cooling support device; embedding the cooling support device into the stripped composite pipe, the outer diameter of the cooling support device is matched with the inner diameter of the stripped composite pipe, and the embedding position of the cooling support device is corresponding to the welding position of the steel connector; welding the steel connector to the end of the stripped composite pipe to obtain a welded composite pipe; performing sealing treatment on the welded composite pipe to generate a new steel-plastic composite pipe.

[0007] Preferably, the steel connector includes a connecting portion, the physical parameters include the thickness of the steel connector and the spacing between the inner side of the steel connector and the connecting portion, and the surface stripping treatment of the steel-plastic composite pipe based on the physical parameters to obtain the stripped composite pipe includes: determining a first stripping length for the outer composite material layer based on the thickness; determining a second stripping length for the middle steel strip layer based on the spacing, the first stripping length being greater than the second stripping length; performing a stripping operation on the end of the steel-plastic composite pipe based on the first stripping length to obtain a preliminary stripped composite pipe; performing a steel strip cutting operation on the end of the preliminary stripped composite pipe based on the second stripping length to obtain a stripped composite pipe.

[0008] Preferably, the cooling support device includes a metal structural frame and a cooling liquid circuit fixedly arranged on the inner surface of the metal structural frame, and the configuration of the cooling support device includes: obtaining the inner diameter of the steel-plastic composite pipe, and configuring the outer diameter of the metal structural frame based on the inner diameter; determining the welding method between the steel connecting part and the intermediate steel belt layer; determining the heat receiving amount and the heating range of the intermediate steel belt layer based on the welding method; configuring the frame length of the metal structural frame based on the heating range, and the frame length is greater than the axial length of the heating range on the intermediate steel belt layer; determining the flow rate and heat absorption amount of the liquid in the cooling liquid circuit; configuring the setting density of the cooling liquid circuit based on the flow rate, heat absorption and heat receiving amount; and spirally arranging the cooling liquid circuit on the inner surface of the metal structural frame according to the setting density.

[0009] Preferably, the manufacturing process also includes: obtaining the radial force applied by the sealing treatment to the welded composite pipe; obtaining the thermal conductivity rate and force deformation data of the metal structural frame; configuring the metal type of the metal structural frame based on the thermal conductivity rate; and configuring the thickness of the metal structural frame based on the force deformation data and the radial force.

[0010] Preferably, the sealing treatment is performed on the welded composite pipe to generate a new steel-plastic composite pipe, including: performing a folding operation on the exposed bottom composite material layer of the welded composite pipe along the top layer of the steel connector to obtain a folded layer; performing a heating treatment on the folded layer to make the folded layer adhere to and partially cover the top of the steel connector; determining a length to be sealed based on the first peeling length, the length to be sealed being greater than the first peeling length; and performing a sealing operation on the exposed middle steel belt layer on the welded composite pipe based on the length to be sealed to generate a new steel-plastic composite pipe.

[0011] Preferably, the surface stripping treatment of the steel-plastic composite pipe based on the physical parameters to obtain the stripped composite pipe also includes: performing a stripping operation on the end of the steel-plastic composite pipe based on the first stripping length to obtain the stripped composite pipe; the sealing treatment of the welded composite pipe to generate a new steel-plastic composite pipe includes: determining the radial width of the sealing ring based on the spacing, the radial width is less than or equal to the spacing, the inner diameter of the sealing ring is smaller than the inner diameter of the steel-plastic composite pipe, the material of the sealing ring is consistent with that of the underlying composite material layer, and the thickness of the sealing ring is consistent with the thickness of the underlying composite material layer; heating the sealing ring, attaching the heated sealing ring to the top of the welded composite pipe and fusing it with the underlying composite material layer to generate a new steel-plastic composite pipe.

[0012] Preferably, the step of attaching the heated sealing ring to the top of the welded composite pipe and fusing it with the underlying composite material layer comprises: performing surface groove treatment on the side of the sealing ring close to the top of the welded composite pipe to generate a grooved sealing ring, the groove on the grooved sealing ring being arranged corresponding to the underlying composite material layer; heating the grooved sealing ring, attaching it to the top of the welded composite pipe, and fusing it with the underlying composite material layer.

[0013] Correspondingly, the present invention also provides a manufacturing device for a steel-plastic composite pipe with a steel connector, which is applied to the manufacturing process described in an embodiment of the present invention, wherein the steel-plastic composite pipe includes a bottom composite material layer, an intermediate steel belt layer and an outer composite material layer, and the manufacturing device includes: a parameter acquisition unit, used to acquire the physical parameters of the steel connector; a stripping unit, used to perform surface stripping treatment on the steel-plastic composite pipe based on the physical parameters to obtain a stripped composite pipe; a configuration unit, used to configure a cooling support device; an embedding unit, used to embed the cooling support device into the stripped composite pipe, the outer diameter of the cooling support device is matched with the inner diameter of the stripped composite pipe, and the embedding position of the cooling support device is set corresponding to the welding position of the steel connector; a welding unit, used to weld the steel connector to the end of the stripped composite pipe to obtain a welded composite pipe; a sealing unit, used to perform sealing treatment on the welded composite pipe to generate a new steel-plastic composite pipe.

[0014] Preferably, the steel connector includes a connecting portion, the physical parameters include the thickness of the steel connector and the spacing between the inner side of the steel connector and the connecting portion, and the stripping unit is specifically used to: determine a first stripping length for the outer composite material layer based on the thickness; determine a second stripping length for the middle steel strip layer based on the spacing, the first stripping length being greater than the second stripping length; perform a stripping operation on the end of the steel-plastic composite pipe based on the first stripping length to obtain a preliminary stripped composite pipe; perform a steel strip cutting operation on the end of the preliminary stripped composite pipe based on the second stripping length to obtain a stripped composite pipe.

[0015] Preferably, the cooling support device includes a metal structural frame and a cooling liquid circuit fixedly arranged on the inner surface of the metal structural frame, and the configuration unit is specifically used to: obtain the inner diameter of the steel-plastic composite pipe, and configure the outer diameter of the metal structural frame based on the inner diameter; determine the welding method between the steel connecting part and the intermediate steel belt layer; determine the heat amount and heating range of the intermediate steel belt layer based on the welding method; configure the frame length of the metal structural frame based on the heating range, and the frame length is greater than the axial length of the heating range on the intermediate steel belt layer; determine the flow rate and heat absorption of the liquid in the cooling liquid circuit; configure the setting density of the cooling liquid circuit based on the flow rate, heat absorption and heat absorption; and spirally arrange the cooling liquid circuit on the inner surface of the metal structural frame according to the setting density.

[0016] Through the technical solution provided by the present invention, the present invention has at least the following technical effects: By improving the existing connection process of steel-plastic composite pipes and directly connecting the steel connecting parts to the middle steel belt layer, the use strength of the steel-plastic composite pipes after multi-section connection can be greatly improved, the separation of the composite material layer and the middle steel belt layer can be avoided, and the corrosion of the steel belt caused by the tearing of the composite material layer can be avoided, thereby increasing the service life of the product and meeting the actual needs of users.

[0017] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a structural schematic diagram of a steel-plastic composite pipe provided by an embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of a steel-plastic composite pipe after peeling provided by an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of embedding a cooling support device in a composite pipe after stripping provided by an embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of a welded composite pipe provided by an embodiment of the present invention;

[0023] Figure 5 It is a structural schematic diagram of a manufacturing device for a steel-plastic composite pipe with a steel connector provided in an embodiment of the present invention.

[0024] Description of Reference Numerals 10 bottom composite material layer 20 middle steel belt layer 30 Outer composite material layer 40 Steel connector 50 Cooling support device 51 Metal structure frame 52 Cooling fluid circuit DETAILED DESCRIPTION

[0025] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0026] The terms "system" and "network" in the embodiments of the present invention can be used interchangeably. "Multiple" means two or more than two. In view of this, "multiple" can also be understood as "at least two" in the embodiments of the present invention. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / ", unless otherwise specified, generally indicates that the previous and subsequent associated objects are in an "or" relationship. In addition, it should be understood that in the description of the embodiments of the present invention, the words "first", "second", etc. are only used to distinguish the purpose of description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.

[0027] The background technology of the present invention is first introduced below.

[0028] In the prior art, the manufacturer of the steel-plastic composite pipe manufactures the steel-plastic composite pipe according to the specified length, diameter and other specifications, and then sends it to the site for use. During on-site use, since the required depth of the exploration operation is different, a large number of scenarios require that the steel-plastic composite pipe be cut into a suitable length and then spliced ​​with the previous steel-plastic composite pipe for use. In the existing splicing method, the composite material layers of the two sections of the steel-plastic composite pipe are brought into contact and heated to fuse them into one. However, in actual application, due to the different physical properties of the steel belt layer and the composite material layer, when the connection length is long, it will cause abnormal stretching of the steel-plastic composite pipe, resulting in tearing or even breaking of the composite material layer, and further cause underground liquid to penetrate into the steel belt layer, causing corrosion to it, greatly reducing the service life of the steel-plastic composite pipe.

[0029] To solve the above technical problems, please see Figure 1 The embodiment of the present invention provides a manufacturing process of a steel-plastic composite pipe with a steel connector, wherein the steel-plastic composite pipe includes a bottom composite material layer 10, an intermediate steel belt layer 20 and an outer composite material layer 30, and the manufacturing process includes: obtaining physical parameters of a steel connector 40; performing surface stripping treatment on the steel-plastic composite pipe based on the physical parameters to obtain a stripped composite pipe; configuring a cooling support device 50; embedding the cooling support device 50 into the steel-plastic composite pipe, wherein the outer diameter of the cooling support device 50 is matched with the inner diameter of the steel-plastic composite pipe, and the embedding position of the cooling support device 50 is corresponding to the welding position of the steel connector; welding the steel connector 40 to the end of the stripped composite pipe to obtain a welded composite pipe; performing sealing treatment on the welded composite pipe to generate a new steel-plastic composite pipe.

[0030] In one possible implementation, the steel-plastic composite pipe is quickly processed to have better connection and sealing properties. Specifically, on the first aspect, the steel connector 40 is directly welded to the middle steel belt layer 20, so that the steel belt with the best tensile performance can withstand the vertical force, so that the steel-plastic composite pipe has better tensile performance. On the second aspect, it is better sealed to maintain excellent sealing performance and increase the service life of the steel-plastic composite pipe.

[0031] Before welding, a series of pre-treatments are required. First, the physical parameters of the steel connector 40 are obtained, and the surface stripping treatment is performed on the steel-plastic composite pipe according to the physical parameters to obtain the composite pipe after stripping. In an embodiment of the present invention, the steel connector 40 includes but is not limited to connectors such as steel flanges and steel external threads, which are used to be fixedly connected to the middle steel belt layer 20 to meet the needs of higher strength connection performance. The physical parameters include but are not limited to the thickness of the steel connector 40 and the distance between the inner side edge of the steel connector 40 and the connecting part. For example, in the first embodiment, the steel connector 40 is a steel flange, and its connecting part is a threaded through hole set thereon; in the second embodiment, the steel connector 40 is a steel external thread, and its connecting part is an external thread set thereon.

[0032] After obtaining the above-mentioned physical parameters, the steel-plastic composite pipe is first subjected to surface stripping treatment. In an embodiment of the present invention, the surface stripping treatment is performed on the steel-plastic composite pipe based on the physical parameters to obtain a composite pipe after stripping, including: determining a first stripping length for the outer composite material layer 30 based on the thickness; determining a second stripping length for the middle steel belt layer 20 based on the spacing, the first stripping length being greater than the second stripping length; performing a stripping operation on the end of the steel-plastic composite pipe based on the first stripping length to obtain a preliminary stripped composite pipe; performing a steel belt cutting operation on the end of the preliminary stripped composite pipe based on the second stripping length to obtain a composite pipe after stripping.

[0033] In one possible implementation, in order to expose the middle steel belt layer 20, the first peeling thickness of the outer composite material layer 30 is first determined based on the thickness of the steel connector 40. In this embodiment, in order to reduce the difficulty in the subsequent welding process and ensure welding reliability, the first peeling thickness should be greater than the thickness of the steel connector 40 to provide sufficient operating space for the welding operation. After performing the peeling operation on the end of the steel-plastic composite pipe, a preliminary peeling composite pipe is obtained. Then, the second peeling thickness for the middle steel belt layer 20 is determined based on the spacing between the inner side of the steel connector 40 and the connection part. In order to ensure sufficient welding length of the middle steel belt layer 20 and avoid the situation where the length of the exposed bottom composite material layer 10 is too long and blocks the connection part, the second peeling thickness should be less than the first peeling thickness, and the second peeling thickness should be slightly less than the above spacing. After the steel belt is cut off at the end of the preliminary stripped composite pipe according to the second peeling thickness, a stripped composite pipe is obtained, for example, see Figure 2 .

[0034] After processing and obtaining the stripped composite pipe, the steel structure 40 is prepared to be welded to the stripped composite pipe. However, in actual application, welding will generate a large amount of heat. After the heat is conducted to the underlying composite material layer 10 through the middle steel belt layer 20, the underlying composite material layer 10 will become soft due to the heat, and further cause the shape to change and even material to fall off, causing damage to the inner wall of the steel-plastic composite pipe, so direct welding cannot be performed.

[0035] To resolve this technical issue, see Figure 3 In an embodiment of the present invention, before welding, it is necessary to first configure a cooling support device 50. In an embodiment of the present invention, the cooling support device 50 includes a metal structure frame 51 and a cooling liquid path 52 fixedly arranged on the inner surface of the metal structure frame 51. The configuration of the cooling support device 50 includes: obtaining the inner diameter of the steel-plastic composite pipe, and configuring the outer diameter of the metal structure frame 51 based on the inner diameter; determining the welding method of the steel connecting piece 40 and the intermediate steel belt layer 20; determining the heat receiving amount and the heating range of the intermediate steel belt layer 20 based on the welding method; configuring the frame length of the metal structure frame 51 based on the heating range, and the frame length is greater than the axial length of the heating range on the intermediate steel belt layer 20; determining the flow rate and heat absorption amount of the liquid in the cooling liquid path 52; configuring the setting density of the cooling liquid path 52 based on the flow rate, heat absorption and heat receiving amount; and spirally arranging the cooling liquid path 52 on the inner surface of the metal structure frame 51 according to the setting density.

[0036] In one possible implementation, since there are multiple specifications of steel-plastic composite pipes, each specification corresponds to a different inner diameter, and in order to ensure the structural strength of the metal structure frame 51, a metal frame must be used, which makes it impossible to flexibly adapt to steel-plastic composite pipes with different inner diameters. Therefore, in the process of configuring the cooling support device 50, the outer diameter of the metal structure frame 51 is first determined according to the inner diameter of the steel-plastic composite pipe. In an embodiment of the present invention, in order to ensure sufficient support for the inner wall of the steel-plastic composite pipe, the outer diameter of the metal structure frame 51 is equal to the inner diameter of the steel-plastic composite pipe, so that they can be configured to fit each other for use.

[0037] Then determine the welding method of the steel connector 40 and the middle steel belt layer 20. In the embodiment of the present invention, the welding method includes but is not limited to arc welding, laser welding, double welding, etc. After determining the specific welding method, determine the heat and heating range of the middle steel belt layer 20. Specifically, for the steel-plastic composite pipe with a larger inner diameter, the larger the welding amount, the greater the heat transferred to the middle steel belt layer 20 and the bottom composite material layer 10, and the wider the heat transfer range. Therefore, according to the welding method and the inner diameter of the steel-plastic composite pipe, the heat and heating range of the middle steel belt layer can be determined. The frame length of the metal structure frame 51 is configured according to the heating range. For example, in one embodiment, the bottom welding position of the steel connecting piece 40 and the middle steel belt layer 20 is located 20 mm away from the end of the steel-plastic composite pipe. During the welding process, the heat generated will soften the underlying composite material layer 10 of 3 mm nearby. Therefore, after the metal structure frame 51 is extended into the steel-plastic composite pipe, its extension range should be greater than 23 mm, for example 24 mm, to ensure the protection of all inner walls of the steel-plastic composite pipe.

[0038] At this time, the flow rate and heat absorption of the liquid in the cooling liquid circuit 52 are further determined. For example, in an embodiment of the present invention, the liquid in the cooling liquid circuit 52 is water. According to the maximum heat transferred to the metal structure frame 51 during the welding process and the heat absorption of water, a reasonable flow rate that satisfies the requirement of taking away a large amount of heat through water can be determined. Furthermore, the setting density of the cooling liquid circuit 52 is further configured according to the above flow rate, heat absorption and heat received to ensure that the heat in the underlying composite material layer 10 can be fully taken away, so that its temperature is maintained in a reasonable range, and the softening due to excessive heat is avoided, which leads to damage to the inner wall of the steel-plastic composite pipe.

[0039] In an embodiment of the present invention, during the welding process of the steel-plastic composite pipe, a cooling support device 50 is provided on the inner wall thereof, which can take away a large amount of heat and has a certain supporting effect. This can effectively reduce the temperature of the underlying composite material layer 10 and reduce its deformation. At the same time, it is supported by the bonding, further ensuring that its appearance is not affected, maintaining the actual sealing performance and inner wall smoothness of the steel-plastic composite pipe, and meeting the actual needs of users.

[0040] Furthermore, after welding is completed, when the exposed intermediate steel belt layer 20 is sealed, the composite material is heated to a fluid state and then pressed into the corresponding area of ​​the exposed intermediate steel belt layer 20 at high pressure so that it is covered on the surface of the exposed intermediate steel belt layer 20. During the pressing process, the high-pressure force acts on the welded composite pipe, which may cause deformation of the welded composite pipe, thereby affecting the subsequent use effect.

[0041] In order to solve the above technical problems, in an embodiment of the present invention, the manufacturing process also includes: obtaining the radial force applied by the sealing treatment to the welded composite pipe; obtaining the heat absorption rate and force deformation data of the metal structural frame 51; configuring the metal type of the metal structural frame 51 based on the heat absorption rate; and configuring the thickness of the metal structural frame 51 based on the force deformation data and the radial force.

[0042] In one possible implementation, the radial force applied by the sealing process to the composite pipe after welding is obtained, and then the heat conduction rate and force deformation data of the metal structural frame 51 are obtained. Since different metals have different heat conduction rates and force bearing capacities, in order to take into account sufficient force bearing capacity and heat conduction capacity, it is necessary to configure the metal type and set thickness of the metal structural frame 51 to ensure that the metal structural frame 51 has sufficient force bearing capacity on the basis of sufficient heat conduction capacity, so as to ensure that during the execution of subsequent sealing operations, sufficient supporting force can be provided for the inner wall of the steel-plastic composite pipe, so that the steel-plastic composite pipe after the sealing operation can maintain a good cylindrical shape to meet actual use requirements.

[0043] After the cooling support device 50 is configured, it is inserted into the stripped composite pipe. Specifically, the embedded position of the cooling support device 50 is set corresponding to the welding position of the steel connector 40. At this time, the steel structure 40 is welded. Specifically, the steel connector 40 is welded to the exposed position of the middle steel belt layer 20 at the end of the stripped composite pipe, so that the steel connector 40 and the middle steel belt layer 20 are reliably welded. In the embodiment of the present invention, the top circle and the bottom circle connected thereto are welded respectively to ensure sufficient fixing strength and obtain the welded composite pipe, for example, see Figure 4 Finally, since the top and bottom of the steel connector 40 and part of the middle steel belt layer 20 are still exposed, they need to be sealed to form a new steel-plastic composite pipe.

[0044] In an embodiment of the present invention, the sealing treatment is performed on the welded composite pipe to generate a new steel-plastic composite pipe, including: performing a folding operation on the exposed bottom composite material layer 10 of the welded composite pipe along the top layer of the steel connector 40 to obtain a folded layer; performing a heating treatment on the folded layer so that the folded layer adheres to and partially covers the top of the steel connector; determining a length to be sealed based on the first peeling length, the length to be sealed being greater than the first peeling length; and performing a sealing operation on the exposed middle steel belt layer 20 on the welded composite pipe based on the length to be sealed to generate a new steel-plastic composite pipe.

[0045] In a possible implementation, the peeled bottom composite material layer 10 is first folded along the top layer of the steel connector 40 to obtain a folded layer, which should be arranged to fit the top of the steel connector 40. The folded layer is then heated so that the folded layer is softened and completely fits and partially covers the top of the steel connector 40. It is then left to cool naturally. The cooled folded layer is completely fitted to the top. In subsequent use, after the ends of the two sections of the steel-plastic composite pipe are pressed and connected, the folded layer forms a seal for the steel connector 40 and the middle steel belt layer 20, so that they will not be corroded by the underground liquid flowing through the steel-plastic composite pipe. At the same time, since the folded layer and the bottom composite material layer 10 are arranged as one body, there will be no gap between the folded layer and the bottom composite material layer 10, thereby ensuring sufficient sealing and anti-corrosion effects.

[0046] At this time, further, the length to be sealed at the bottom of the steel connector 40 is determined according to the first stripping length. In order to ensure a sufficient sealing effect on the middle steel belt layer 20 below the steel connector 40, the first stripping length should be greater than the first stripping length, so that the added sealing material, for example, a composite material consistent with the outer composite material layer 30, can be fully integrated with the outer composite material layer 30 after heating, and completely cover the middle steel belt layer 20 exposed by the previous stripping, so as to achieve a reliable sealing and protection effect. After completing the above welding and sealing operations, take out the cooling support device 50 to obtain a new steel-plastic composite pipe.

[0047] In the embodiment of the present invention, the existing steel-plastic composite pipe is improved, the surface is stripped according to actual needs and the steel connector 40 is directly connected to the middle steel belt layer 20, thereby not only ensuring the connectability between different steel-plastic composite pipes, but also ensuring through reliable technical means that the improved steel-plastic composite pipe has an effective sealing effect and anti-corrosion ability, thereby meeting the actual needs of users.

[0048] However, in actual application, since the outer composite material layer 30 and the middle steel belt layer 20 are made of different materials, effective adhesion is often not achieved. Therefore, when peeling off the outer composite material layer 30, it can be carried out well, but in the process of peeling off the middle steel belt layer 20, on the one hand, the metal peeling is more difficult than the material peeling; on the other hand, the thickness of the middle steel belt layer 20 is small, and the bottom composite material layer 10 is easily damaged during the peeling process, which causes trouble to the technicians.

[0049] In order to solve this technical problem, in an embodiment of the present invention, the surface stripping treatment is performed on the steel-plastic composite pipe based on the physical parameters to obtain the stripped composite pipe, and also includes: performing a stripping operation on the end of the steel-plastic composite pipe based on the first stripping length to obtain the stripped composite pipe; the sealing treatment is performed on the welded composite pipe to generate a new steel-plastic composite pipe, including: determining the radial width of the sealing ring based on the spacing, the radial width is less than or equal to the spacing, the inner diameter of the sealing ring is smaller than the inner diameter of the steel-plastic composite pipe, the material of the sealing ring is consistent with that of the underlying composite material layer 10, and the thickness of the sealing ring is consistent with the thickness of the underlying composite material layer 10; the sealing ring is heated, the heated sealing ring is attached to the top of the welded composite pipe and fused and connected with the underlying composite material layer to generate a new steel-plastic composite pipe.

[0050] In a possible implementation, after the end of the steel-plastic composite pipe is stripped according to the first stripping length and the stripped composite pipe is obtained, the intermediate steel belt layer 20 is not further stripped, but a sealing ring is arranged on the top of the stripped composite pipe to achieve the same sealing effect. Specifically, the radial width of the sealing ring is first determined according to the spacing between the inner side of the steel connector and the connecting portion, and the radial width is less than or equal to the spacing. In the embodiment of the present invention, the radial width is equal to the spacing, and the inner diameter of the sealing ring is slightly smaller than the inner diameter of the steel-plastic composite pipe. At the same time, the thickness of the sealing ring is consistent with the thickness of the underlying composite material layer 10, thereby completing the configuration of the sealing ring.

[0051] In the embodiment of the present invention, an additionally configured sealing ring is directly bonded and fused to the underlying composite material layer 10, and the sealing effect of the intermediate steel belt layer 20 can be achieved without the need to peel off the intermediate steel belt layer 20. This can effectively reduce the difficulty of processing, and the above process can be relatively easily implemented on site in the construction scene, thereby effectively expanding the feasibility and scope of implementation of the above process.

[0052] After the sealing ring is configured, the sealing ring is heated, and then the heated sealing ring is attached to the top of the welded composite pipe and fused with the bottom composite material layer 10 to generate a new steel-plastic composite pipe.

[0053] In actual application, when cutting the sealing layer of the steel-plastic composite pipe, there is non-standard cutting, resulting in uneven ends of the steel-plastic composite pipe. As a result, after welding it and obtaining the welded composite pipe, when using a sealing ring to seal the end of the welded composite pipe, there may be a situation where the seal is not in place.

[0054] In order to solve the above technical problems, the heated sealing ring is attached to the top of the welded composite pipe and fused with the underlying composite material layer, including: performing surface groove treatment on the side of the sealing ring close to the top of the welded composite pipe to generate a grooved sealing ring, the groove on the grooved sealing ring is set corresponding to the underlying composite material layer 10; after heating the grooved sealing ring, it is attached to the top of the welded composite pipe and fused with the underlying composite material layer.

[0055] In a possible implementation, before the sealing ring is fitted, a surface groove treatment is performed on the side of the sealing ring close to the welded composite pipe to generate a grooved sealing ring. In an embodiment of the present invention, in order to ensure that the groove is fully fitted with the underlying composite material layer 10, the cross-section of the groove is trapezoidal. During the fitting, the sealing ring is heated and the trapezoidal groove is aligned with the underlying composite material layer 10 and fitted to the top of the welded composite pipe, so that the grooved sealing ring can be fully integrated and connected with the underlying composite material layer 10, achieving a sealing effect on the middle steel belt layer 20, and at the same time achieving partial coverage of the steel connecting piece 40. In the subsequent use process, the sealing effect of the steel connecting piece 40 can be achieved, effectively protecting the steel connecting piece 40 and the middle steel belt layer 20, meeting actual needs.

[0056] See also Figure 5 The embodiment of the present invention provides a manufacturing device for a steel-plastic composite pipe with a steel connector, which is applied to the manufacturing process according to the embodiment of the present invention. The steel-plastic composite pipe includes a bottom composite material layer, an intermediate steel belt layer and an outer composite material layer. The manufacturing device includes: a parameter acquisition unit, which is used to acquire the physical parameters of the steel connector; a stripping unit, which is used to perform surface stripping treatment on the steel-plastic composite pipe based on the physical parameters to obtain a stripped composite pipe; a configuration unit, which is used to configure a cooling support device; an embedding unit, which is used to embed the cooling support device into the stripped composite pipe, the outer diameter of the cooling support device is matched with the inner diameter of the stripped composite pipe, and the embedding position of the cooling support device is set corresponding to the welding position of the steel connector; a welding unit, which is used to weld the steel connector to the end of the stripped composite pipe to obtain a welded composite pipe; a sealing unit, which is used to perform sealing treatment on the welded composite pipe to generate a new steel-plastic composite pipe.

[0057] In an embodiment of the present invention, the steel connector includes a connecting portion, the physical parameters include the thickness of the steel connector and the spacing between the inner side of the steel connector and the connecting portion, and the stripping unit is specifically used to: determine a first stripping length for the outer composite material layer based on the thickness; determine a second stripping length for the middle steel strip layer based on the spacing, the first stripping length being greater than the second stripping length; perform a stripping operation on the end of the steel-plastic composite pipe based on the first stripping length to obtain a preliminary stripped composite pipe; perform a steel strip cutting operation on the end of the preliminary stripped composite pipe based on the second stripping length to obtain a stripped composite pipe.

[0058] In an embodiment of the present invention, the cooling support device includes a metal structure frame and a cooling liquid circuit fixedly arranged on the inner surface of the metal structure frame, and the configuration unit is specifically used to: obtain the inner diameter of the steel-plastic composite pipe, and configure the outer diameter of the metal structure frame based on the inner diameter; determine the welding method between the steel connecting part and the intermediate steel belt layer; determine the heat receiving and heating range of the intermediate steel belt layer based on the welding method; configure the frame length of the metal structure frame based on the heating range, and the frame length is greater than the axial length of the heating range on the intermediate steel belt layer; determine the flow rate and heat absorption of the liquid in the cooling liquid circuit; configure the setting density of the cooling liquid circuit based on the flow rate, heat absorption and heat receiving; and spirally arrange the cooling liquid circuit on the inner surface of the metal structure frame according to the setting density.

[0059] The optional implementation modes of the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical scheme of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

[0060] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0061] In addition, various implementation modes of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed by the embodiments of the present invention.

Claims

1. A manufacturing process for a steel-plastic composite pipe with a steel connector, the steel-plastic composite pipe comprising a bottom composite material layer, an intermediate steel belt layer and an outer composite material layer, characterized in that: The manufacturing process comprises: Obtain physical parameters of steel connectors; Performing surface peeling treatment on the steel-plastic composite pipe based on the physical parameters to obtain a stripped composite pipe; Configure cooling support device; The cooling support device is embedded in the stripped composite pipe, the outer diameter of the cooling support device is matched with the inner diameter of the stripped composite pipe, and the embedding position of the cooling support device is corresponding to the welding position of the steel connector; Welding the steel connector to the end of the stripped composite pipe to obtain a welded composite pipe; The welded composite pipe is sealed to generate a new steel-plastic composite pipe.

2. The manufacturing process according to claim 1, characterized in that: The steel connector includes a connecting portion, the physical parameters include the thickness of the steel connector and the distance between the inner side of the steel connector and the connecting portion, and the surface peeling treatment is performed on the steel-plastic composite pipe based on the physical parameters to obtain the stripped composite pipe, including: determining a first peel length for the outer composite material layer based on the thickness; Determining a second stripping length for the middle steel strip layer based on the spacing, wherein the first stripping length is greater than the second stripping length; Based on the first stripping length, a stripping operation is performed on the end of the steel-plastic composite pipe to obtain a preliminary stripped composite pipe; A steel strip cutting operation is performed on the end of the preliminary stripped composite pipe based on the second stripping length to obtain a stripped composite pipe.

3. The manufacturing process according to claim 1, characterized in that: The cooling support device comprises a metal structure frame and a cooling liquid path fixedly arranged on the inner surface of the metal structure frame. The cooling support device comprises: Obtaining the inner diameter of the steel-plastic composite pipe, and configuring the outer diameter of the metal structural frame based on the inner diameter; Determining the welding method between the steel connecting piece and the middle steel strip layer; Determining the amount of heat and the range of heat received by the middle steel strip layer based on the welding method; Configuring a frame length of the metal structure frame based on the heating range, wherein the frame length is greater than an axial length of the heating range on the middle steel strip layer; Determining the flow rate and heat absorption of the liquid in the cooling liquid circuit; Configuring the setting density of the cooling liquid circuit based on the flow rate, the amount of heat absorbed and the amount of heat received; The cooling liquid path is spirally arranged on the inner surface of the metal structure frame according to the setting density.

4. The manufacturing process according to claim 3, characterized in that: The manufacturing process also includes: Obtaining the radial force applied by the sealing process to the welded composite pipe; Obtaining heat conduction rate and stress deformation data of the metal structural frame; configuring a metal type of the metal structural frame based on the heat transfer rate; The thickness of the metal structural frame is configured based on the force deformation data and the radial force.

5. The manufacturing process according to claim 2, characterized in that: The step of performing sealing treatment on the welded composite pipe to generate a new steel-plastic composite pipe comprises: Performing a folding operation on the exposed bottom composite material layer of the welded composite pipe along the top layer of the steel connector to obtain a folded layer; Performing a heating treatment on the folded layer so that the folded layer adheres to and partially covers the top of the steel connector; Determine a length to be sealed based on the first peeling length, wherein the length to be sealed is greater than the first peeling length; A sealing operation is performed on the exposed middle steel strip layer on the welded composite pipe based on the length to be sealed to generate a new steel-plastic composite pipe.

6. The manufacturing process according to claim 2, characterized in that: The performing of surface peeling treatment on the steel-plastic composite pipe based on the physical parameters to obtain the stripped composite pipe also includes: Based on the first stripping length, a stripping operation is performed on the end of the steel-plastic composite pipe to obtain a stripped composite pipe; The step of performing sealing treatment on the welded composite pipe to generate a new steel-plastic composite pipe comprises: The radial width of the sealing ring is determined based on the spacing, the radial width is less than or equal to the spacing, the inner diameter of the sealing ring is smaller than the inner diameter of the steel-plastic composite pipe, the sealing ring is made of the same material as the underlying composite material layer, and the thickness of the sealing ring is consistent with the thickness of the underlying composite material layer; The sealing ring is subjected to a heating treatment, and the heated sealing ring is attached to the top of the welded composite pipe and fused and connected with the bottom composite material layer to generate a new steel-plastic composite pipe.

7. The manufacturing process according to claim 6, characterized in that: The step of attaching the heated sealing ring to the top of the welded composite pipe and fusing it with the bottom composite material layer comprises: Performing surface groove processing on the side of the sealing ring close to the top of the welded composite pipe to generate a sealing ring with a groove, wherein the groove on the sealing ring with a groove is arranged corresponding to the bottom composite material layer; The grooved sealing ring is heated and attached to the top of the welded composite pipe and fused with the bottom composite material layer.

8. A manufacturing device for a steel-plastic composite pipe with a steel connector, applied to the manufacturing process according to any one of claims 1 to 7, wherein the steel-plastic composite pipe comprises a bottom composite material layer, an intermediate steel belt layer and an outer composite material layer, characterized in that: The manufacturing device comprises: A parameter acquisition unit, used to acquire physical parameters of the steel connector; A stripping unit, used for performing a surface stripping process on the steel-plastic composite pipe based on the physical parameters to obtain a stripped composite pipe; A configuration unit, used for configuring a cooling support device; An embedding unit, used for embedding the cooling support device into the interior of the stripped composite pipe, wherein the outer diameter of the cooling support device is matched with the inner diameter of the stripped composite pipe, and the embedding position of the cooling support device is corresponding to the welding position of the steel connector; A welding unit, used for welding the steel connector to the end of the stripped composite pipe to obtain a welded composite pipe; The sealing unit is used to perform sealing treatment on the welded composite pipe to generate a new steel-plastic composite pipe.

9. The manufacturing device according to claim 8, characterized in that: The steel connector includes a connecting portion, the physical parameters include a thickness of the steel connector and a distance between an inner side of the steel connector and the connecting portion, and the stripping unit is specifically used for: determining a first peel length for the outer composite material layer based on the thickness; Determining a second stripping length for the middle steel strip layer based on the spacing, wherein the first stripping length is greater than the second stripping length; Based on the first stripping length, a stripping operation is performed on the end of the steel-plastic composite pipe to obtain a preliminary stripped composite pipe; A steel strip cutting operation is performed on the end of the preliminary stripped composite pipe based on the second stripping length to obtain a stripped composite pipe.

10. The manufacturing device according to claim 8, characterized in that: The cooling support device includes a metal structure frame and a cooling liquid path fixedly arranged on the inner surface of the metal structure frame, and the configuration unit is specifically used for: Obtaining the inner diameter of the steel-plastic composite pipe, and configuring the outer diameter of the metal structural frame based on the inner diameter; Determining the welding method between the steel connecting piece and the middle steel strip layer; Determining the amount of heat and the range of heat received by the middle steel strip layer based on the welding method; Configuring a frame length of the metal structure frame based on the heating range, wherein the frame length is greater than an axial length of the heating range on the middle steel strip layer; Determining the flow rate and heat absorption of the liquid in the cooling liquid circuit; Configuring the setting density of the cooling liquid circuit based on the flow rate, the amount of heat absorbed and the amount of heat received; The cooling liquid path is spirally arranged on the inner surface of the metal structure frame according to the setting density.

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