Reinforced polyethylene electrofusion pipe fitting and method of manufacture

Abstract

The application discloses a reinforced polyethylene electric melting pipe fitting and a processing method. The processing method is used for forming the reinforced polyethylene electric melting pipe fitting by embedding resistance wires into a reinforced polyethylene pipe section. The reinforced polyethylene electric melting pipe fitting is used for connecting a plurality of steel wire winding pipes, can effectively improve the pressure bearing capacity of the connection part, and can make the pressure bearing capacity consistent with that of the steel wire winding pipe. The reinforced polyethylene electric melting pipe fitting comprises a polyethylene pipe section, a resistance wire joint, a steel wire layer and resistance wires. The polyethylene pipe section is a double-layer structure. The steel wire layer is arranged between an inner layer pipe and an outer layer pipe. The steel wire layer is formed by spirally winding steel wires on the inner layer pipe. The outer layer pipe completely covers the steel wire layer. The polyethylene pipe section and the steel wire layer jointly form a reinforced polyethylene pipe section. The resistance wires are embedded on the inner wall of the reinforced polyethylene pipe section. The resistance wires are spirally arranged on the inner wall of the reinforced polyethylene pipe section. The inner wall of the reinforced polyethylene pipe section is provided with a spiral groove.

Description

TECHNICAL FIELD

[0001] The present application relates to a reinforced polyethylene electrofusion pipe fitting and a processing method thereof, and belongs to the technical field of water supply and drainage, in particular to a processing method for forming a reinforced polyethylene electrofusion pipe fitting by embedding a resistance wire into a reinforced polyethylene pipe segment, and connecting multiple steel wire winding pipes through the reinforced polyethylene electrofusion pipe fitting, so as to effectively improve the pressure bearing capacity of the connection part and make the pressure bearing capacity of the connection part consistent with that of the steel wire winding pipe. BACKGROUND

[0002] The pipe is usually made of PE material, which has the advantage of strong corrosion resistance, but the rigidity and strength are always important problems faced by researchers. At present, the common solution to the pipe material is to start from material research and development, which has a long development cycle and high comprehensive cost.

[0003] In order to improve the above problems, the applicant proposes a Chinese utility model patent application for steel wire winding pipe with the patent name CN210153353U. The winding pipe improves the structure of the pipe on the physical level, which includes an inner layer pipe first hot-melt extruded, an outer layer pipe second hot-melt extruded, and a steel wire layer sandwiched between the inner layer pipe and the outer layer pipe. The rigidity and strength of the pipe body are enhanced by the internal reinforcing rib, so that the pipe body is not easy to deform along the axial direction, greatly reduces the deflection of the pipe body along the axial direction, and has better shear resistance.

[0004] In actual use, multiple steel wire winding pipes need to be connected end to end and laid in a trench to meet the drainage distance requirement. However, the steel wire winding pipe cannot be directly hot-melt butt welded due to the steel wire wound in the pipe wall, so it needs to be connected end to end by polyethylene flaring hot-melt connection, polyethylene electrofusion pipe fitting connection or rubber sealing ring connection. However, the connection part is only made of polyethylene material, and the pressure bearing capacity is low. The pressure bearing capacity of the connected steel wire winding pipe is lower than that of the steel wire winding pipe itself. If the steel wire winding pipe itself is used for drainage, the connection part is easily broken under excessive pressure. If the pressure bearing capacity of the connection part is used for drainage, it will cause waste of the drainage capacity of the long steel wire winding pipe. SUMMARY

[0005] In order to improve the above situation, the present application provides a processing method for forming a reinforced polyethylene electrofusion pipe fitting by embedding a resistance wire into a reinforced polyethylene pipe segment, and connecting multiple steel wire winding pipes through the reinforced polyethylene electrofusion pipe fitting, so as to effectively improve the pressure bearing capacity of the connection part and make it consistent with that of the steel wire winding pipe.

[0006] The application is characterized in that the polyethylene pipe section is a double-layer structure, a steel wire layer is arranged between the inner layer pipe and the outer layer pipe, the steel wire layer is formed by spirally winding steel wires on the inner layer pipe, the outer layer pipe completely covers the steel wire layer, the polyethylene pipe section and the steel wire layer jointly constitute a reinforced polyethylene pipe section, the resistance wire is embedded on the inner wall of the reinforced polyethylene pipe section, and the resistance wire is spirally arranged on the inner wall of the reinforced polyethylene pipe section.

[0007] Preferably, the inner wall of the reinforced polyethylene pipe section is provided with a spiral groove, and the resistance wire is embedded in the spiral groove.

[0008] Preferably, the inner layer pipe and the outer layer pipe are formed by hot melting and extrusion, the steel wires are embedded on the inner layer pipe, and the inner layer pipe and the outer layer pipe are adhered to each other.

[0009] Preferably, the distance from the steel wire layer to the inner wall of the polyethylene pipe section is greater than the distance from the steel wire layer to the outer wall of the polyethylene pipe section.

[0010] Preferably, the inner layer pipe and the outer layer pipe are formed by hot melting and extrusion, the steel wires are embedded on the inner layer pipe, and the inner layer pipe and the outer layer pipe are adhered to each other.

[0011] Preferably, the distance from the steel wire layer to the inner wall of the polyethylene pipe section is greater than the distance from the steel wire layer to the outer wall of the polyethylene pipe section.

[0012] The pipe wall at the two ends of the reinforced polyethylene pipe section is respectively provided with a joint mounting hole corresponding to the joint mounting hole, and the resistance wire joint is arranged in the joint mounting hole.

[0013] The pipe wall at the two ends of the reinforced polyethylene pipe section is respectively provided with a joint mounting hole corresponding to the joint mounting hole, and the resistance wire joint is arranged in the joint mounting hole.

[0014] The application also relates to a processing method of the reinforced polyethylene electric melting pipe joint, and the application is characterized by the following steps:

[0015] (1) producing the reinforced polyethylene pipe section through a hot melting and extrusion production line;

[0016] (2) opening a joint mounting hole at the pipe wall at the two ends of the reinforced polyethylene pipe section and opening a resistance wire perforation at a position corresponding to the joint mounting hole;

[0017] (3) clamping the reinforced polyethylene pipe section on a numerical control machine tool so that the reinforced polyethylene pipe section and the main shaft of the machine tool rotate together;

[0018] (4) turning the inner circle of the reinforced polyethylene pipe section through the numerical control machine tool to ensure the roundness of the inner diameter of the pipe section and prepare for uniformly embedding the resistance wire;

[0019] (5) Install the wire embedding tool on the feed axis of the CNC machine tool, open a spiral groove on the inner wall of the reinforced polyethylene pipe section by the cutter, embed the resistance wire into the groove, and cover the resistance wire by extrusion to form a reinforced polyethylene electrofusion pipe fitting.

[0020] (6) Remove the reinforced polyethylene electrofusion fitting from the CNC machine tool, pass the end of the resistance wire through the resistance wire through hole into the joint mounting hole, and install the resistance wire connector into the joint mounting hole and connect it with the resistance wire.

[0021] The present invention also relates to an embedded wire cutting tool, which includes a heating assembly, a grooving assembly, and an extrusion assembly. The grooving assembly is placed on the heating assembly, the extrusion assembly is placed on the heating assembly, and the heating assembly is mounted on a CNC machine tool.

[0022] The invention is characterized in that the grooving assembly performs spiral grooving on the reinforced polyethylene pipe section and simultaneously embeds the resistance wire into the groove; the extrusion assembly extrudes the grooving to embed the resistance wire; and the heating assembly heats the grooving assembly, so that when the grooving assembly performs spiral grooving, the polyethylene pipe walls on both sides of the grooving soften, making it easier for the resistance wire to be embedded into the grooving. At the same time, the extrusion assembly presses the softened polyethylene pipe walls on both sides of the grooving to make them more tightly fused together to embed the resistance wire, preventing the resistance wire from falling out of the grooving and improving the stability of the embedding of the resistance wire.

[0023] The heating assembly consists of a hollow heating column, a hollow support column, a cutter mounting groove, a first guide wire roller, a second guide wire roller, a heating coil, and a heat-conducting rod.

[0024] One end of the hollow support column is placed at one end of the hollow heating column, and the hollow support column and the hollow heating column are connected.

[0025] Preferably, the surface of the hollow heating column is covered with heat-insulating material, and the wall thickness at one end of the hollow heating column is smaller than the wall thickness at the other end.

[0026] Preferably, the surface of the hollow support column is covered with heat-insulating material, and the hollow support column extends horizontally from one end to the other for a certain distance, then bends and extends obliquely to the other end.

[0027] The hollow support column has a cutter mounting groove at its other end, and the cutter mounting groove is connected to the hollow support column.

[0028] The heating coil is placed inside the hollow heating column and connected to the inner wall of the hollow heating column. The heat-conducting rod is placed inside the hollow heating column.

[0029] Preferably, the heat-conducting rod is located in the heating coil, one end of the heat-conducting rod is arranged on the inner wall of the other end of the hollow heating column, and the other end of the heat-conducting rod extends along the center lines of the hollow heating column and the hollow supporting column to the other end of the hollow supporting column,

[0030] The first wire guide roller is rotatably arranged on the side wall of the other end of the hollow supporting column, and the second wire guide roller is rotatably arranged on the side wall of the one end of the hollow heating column,

[0031] A connecting groove is formed in the other end of the hollow heating column, a key groove is formed in the groove wall of the connecting groove, and the hollow heating column is connected with the machine tool spindle by matching the connecting groove with the key groove,

[0032] The cutting groove assembly is composed of a cutting knife, a resistance wire pressing hole and a resistance wire clamping groove,

[0033] The cutting knife is detachably arranged in the cutting knife mounting groove, the resistance wire pressing hole is formed in the cutting surface of the cutting knife, and the resistance wire clamping groove is formed in the side surface of the cutting knife,

[0034] Preferably, the cutting knife and the heat-conducting rod are in contact,

[0035] The extrusion assembly is composed of an extrusion roller and a roller support,

[0036] The extrusion roller is rotatably arranged at the other end of the hollow supporting column through the roller support,

[0037] Preferably, the extrusion roller is located on one side of the cutting knife, and the lowest point of the extrusion roller is higher than the height of the cutting edge of the cutting knife. Beneficial effects

[0038] I. By embedding resistance wires into the reinforced polyethylene pipe section to form a reinforced polyethylene electric melting pipe fitting, multiple steel wire winding pipes can be connected, which can effectively improve the pressure bearing capacity of the connection, make it consistent with the steel wire winding pipe, and avoid the rupture of the connection due to excessive pressure bearing.

[0039] II. The cutting knife is heated by the heating coil and the heat-conducting rod, the hot knife cuts the groove, and the polyethylene pipe walls on both sides of the groove are softened, so that the resistance wires are more easily embedded in the cutting groove.

[0040] III. After the cutting knife is heated, the polyethylene pipe walls are cut, and the softened polyethylene pipe walls on both sides of the cutting groove can be more tightly fused together under the action of the extrusion assembly to embed and cover the resistance wires, prevent the resistance wires from falling off from the cutting groove, and improve the stability of the embedded resistance wires.

[0041] IV. Simple structure and convenient use. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 It is a perspective view of a reinforced polyethylene electric melting pipe fitting of the present application;

[0043] Figure 2 It is a structure schematic view of a reinforced polyethylene electrofusion pipe fitting of the present application;

[0044] Figure 3 It is a structure schematic view of a reinforced polyethylene electrofusion pipe fitting of the present application, which only shows the structure of the resistance wire joint;

[0045] Figure 4 It is a perspective view of a wire-embedded cutter of the present application;

[0046] Figure 5 It is a structure schematic view of a wire-embedded cutter of the present application;

[0047] Figure 6 It is a structure schematic view of a wire-embedded cutter of the present application, which only shows the structure of the cutter.

[0048] DRAWINGS

[0049] Among them are: polyethylene pipe section (1), joint mounting hole (2), resistance wire joint (3), steel wire layer (4), resistance wire (5), resistance wire perforation (6), hollow heating column (7), hollow support column (8), cutter mounting groove (9), cutter (10), resistance wire pressing hole (11), extrusion roller (12), roller support (13), first wire guide roller (14), second wire guide roller (15), machine tool input shaft (16), connecting groove (17), heating coil (18), heat conducting rod (19), resistance wire slot (20) DETAILED DESCRIPTION

[0050] The reinforced polyethylene electrofusion pipe fitting of the present application comprises a polyethylene pipe section (1), a resistance wire joint (3), a steel wire layer (4) and a resistance wire (5),

[0051] characterized in that the polyethylene pipe section (1) is a double-layer structure, a steel wire layer (4) is arranged between the inner layer pipe and the outer layer pipe, the steel wire layer (4) is formed by spirally winding steel wires on the inner layer pipe, the outer layer pipe completely covers the steel wire layer (4), the polyethylene pipe section (1) and the steel wire layer (4) together constitute a reinforced polyethylene pipe section (1), the resistance wire (5) is embedded on the inner wall of the reinforced polyethylene pipe section (1), and the resistance wire (5) is spirally arranged on the inner wall of the reinforced polyethylene pipe section (1),

[0052] Preferably, the inner wall of the reinforced polyethylene pipe section (1) is provided with a spiral groove, and the resistance wire (5) is embedded in the spiral groove,

[0053] Preferably, the spirally arranged resistance wire (5) has two sections, the two sections of the resistance wire (5) are respectively located at two ends of the reinforced polyethylene pipe section (1), and the two sections of the resistance wire (5) are connected,

[0054] Preferably, the inner layer pipe and the outer layer pipe are formed by hot melt extrusion, the steel wire is embedded on the inner layer pipe, and the inner layer pipe and the outer layer pipe are adhered to each other,

[0055] Preferably, the distance from the steel wire layer (4) to the inner wall of the polyethylene pipe section (1) is greater than the distance from the steel wire layer (4) to the outer wall of the polyethylene pipe section (1),

[0056] The pipe wall of the reinforced polyethylene pipe section (1) at both ends is respectively provided with a joint mounting hole (2), and the resistance wire joint (3) is arranged in the joint mounting hole (2),

[0057] The reinforced polyethylene pipe section (1) is provided with a resistance wire perforation (6) at a position corresponding to the joint mounting hole (2) at each end, and the resistance wire (5) is connected by penetrating the resistance wire perforation (6) and the resistance wire joint (3),

[0058] In use, after the end of the two steel wire winding pipes is cleaned, the two ends are respectively inserted into the reinforced polyethylene electrofusion pipe fittings at both ends, power is supplied, the resistance wire joint (3) is connected to the power supply, the resistance wire (5) generates heat to melt the polyethylene material on the inner wall of the reinforced polyethylene pipe section (1) and the outer wall of the steel wire winding pipe, the melted polyethylene material is fused with each other, then power is cut off, the melted polyethylene material is gradually cooled and solidified, so that the two steel wire winding pipes are firmly connected;

[0059] The processing method of the reinforced polyethylene electrofusion pipe fitting is characterized by the following steps:

[0060] (1) The reinforced polyethylene pipe section (1) is produced by a hot melt extrusion production line;

[0061] Preferably, the reinforced polyethylene pipe section (1) is directly cut from the steel wire winding pipe,

[0062] Preferably, the length of the reinforced polyethylene pipe section (1) is between 10 mm and 1000 mm;

[0063] (2) The joint mounting hole (2) is formed on the pipe wall at both ends of the reinforced polyethylene pipe section (1), and the resistance wire perforation (6) is formed at a position corresponding to the joint mounting hole (2);

[0064] (3) The reinforced polyethylene pipe section (1) is clamped on the numerical control machine tool, so that the reinforced polyethylene pipe section (1) rotates together with the main shaft of the machine tool;

[0065] (4) The numerical control machine tool is used to turn the inner circle of the reinforced polyethylene pipe section (1), so as to ensure the roundness of the inner diameter of the pipe section and prepare for the subsequent uniform embedding of the resistance wire (5);

[0066] (5) install the embedded wire tool to the spindle (16) of the numerical control machine tool, open the spiral cutting groove in the inner wall of the reinforced polyethylene pipe section (1) through the cutting tool (10), embed the resistance wire (5) into the groove, and embed and cover the resistance wire (5) through extrusion to form the reinforced polyethylene electrofusion pipe fitting;

[0067] (6) remove the reinforced polyethylene electrofusion pipe fitting from the numerical control machine tool, pass the end of the resistance wire (5) into the joint mounting hole (2) through the resistance wire perforation (6), and install the resistance wire joint (3) into the joint mounting hole (2) and connect it with the resistance wire (5);

[0068] Preferably, after the resistance wire joint (3) is installed into the joint mounting hole (2) and connected with the resistance wire (5), whether there is a poor contact condition is detected through power supply;

[0069] The embedded wire tool comprises a heating assembly, a cutting groove assembly and an extrusion assembly, the cutting groove assembly is arranged on the heating assembly, the extrusion assembly is arranged on the heating assembly, and the heating assembly is installed on the numerical control machine tool,

[0070] The cutting groove assembly performs spiral cutting on the reinforced polyethylene pipe section (1) and embeds the resistance wire (5) into the groove, the extrusion assembly extrudes the cutting groove to embed and cover the resistance wire (5), and the heating assembly heats the cutting groove assembly, so that when the cutting groove assembly performs spiral cutting, the polyethylene pipe walls on both sides of the cutting groove are softened, the resistance wire (5) is more easily embedded into the cutting groove, and the extrusion assembly compresses the softened polyethylene pipe walls on both sides of the cutting groove, so that they can be more tightly fused together to embed and cover the resistance wire (5), prevent the resistance wire (5) from falling off from the cutting groove, and improve the stability of embedding the resistance wire (5);

[0071] The heating assembly comprises a hollow heating column (7), a hollow supporting column (8), a cutting tool mounting groove (9), a first wire guide roller (14), a second wire guide roller (15), a heating coil (18) and a heat conducting rod (19),

[0072] One end of the hollow supporting column (8) is arranged at one end of the hollow heating column (7), and the hollow supporting column (8) and the hollow heating column (7) are connected in communication,

[0073] Preferably, the surface of the hollow heating column (7) is coated with a heat insulation material, and the wall thickness of one end of the hollow heating column (7) is smaller than that of the other end,

[0074] Preferably, the surface of the hollow supporting column (8) is coated with a heat insulation material, and the hollow supporting column (8) extends horizontally for a distance from one end to the other end, and then bends and extends obliquely to the other end,

[0075] The hollow support column (8) has a cutting tool installation slot (9) at the other end, which is connected with the hollow support column (8),

[0076] The heating coil (18) is arranged in the hollow heating column (7) and connected with the inner wall of the hollow heating column (7), and the heat conduction rod (19) is arranged in the hollow heating column (7),

[0077] Preferably, the heat conduction rod (19) is located in the heating coil (18), one end of the heat conduction rod (19) is arranged on the inner wall of the other end of the hollow heating column (7), and the other end of the heat conduction rod (19) extends along the center line of the hollow heating column (7) and the hollow support column (8) to the other end of the hollow support column (8),

[0078] The first wire guide roller (14) is rotatably arranged on the side wall of the other end of the hollow support column (8), and the second wire guide roller (15) is rotatably arranged on the side wall of the one end of the hollow heating column (7),

[0079] The other end of the hollow heating column (8) has a connecting slot (17), the slot wall of the connecting slot (17) has a key groove, and the hollow heating column (7) is connected with the machine tool spindle (16) through the connecting slot (17) and the key groove,

[0080] The cutting slot assembly is composed of a cutting tool (10), a resistance wire pressing hole (11) and a resistance wire clamping groove (20),

[0081] The cutting tool (10) is detachably arranged in the cutting tool installation slot (9), the cutting tool (10) has the resistance wire pressing hole (11) on the tool face, and the cutting tool (10) has the resistance wire clamping groove (20) on the side face,

[0082] Preferably, the cutting tool (10) is in contact with the heat conduction rod (19),

[0083] The extrusion assembly is composed of an extrusion roller (12) and a roller support (13),

[0084] The extrusion roller (12) is rotatably arranged at the other end of the hollow support column (8) through the roller support (13),

[0085] Preferably, the extrusion roller (12) is located on one side of the cutting tool (10), and the lowest point of the extrusion roller (12) is higher than the height of the cutting tool tip (10);

[0086] In use, the heating coil (18) and the power supply are connected to be powered on, the heating coil (18) heats the heat-conducting rod (19), and the heat of the heat-conducting rod (19) is transmitted to the cutting knife (10), so that the cutting knife (10) is heated. At the same time, the resistance wire (5) passes through the first guide roller (14) and the second guide roller (15), passes through the resistance wire pressing hole (11) on the cutting knife (10), and is then placed in the resistance wire clamping groove (20), so that the resistance wire (5) is located below the cutting knife (10). The heated cutting knife (10) is driven by the numerical control machine tool to perform spiral slotting on the reinforced polyethylene pipe section (1), and the resistance wire (5) is embedded in the slot. In the process of embedding the resistance wire (5) in the slot, the extrusion roller (12) rotates to press the softened polyethylene pipe wall on both sides of the slot, so that the resistance wire (5) is embedded in the slot.

[0087] The distance from the steel wire layer (4) to the inner wall of the polyethylene pipe section (1) is greater than the distance from the steel wire layer (4) to the outer wall of the polyethylene pipe section (1), which provides space for the opening of the joint mounting hole (2) and avoids damage to the steel wire layer (4) during drilling, thereby reducing the pressure strength of the electric melting pipe fitting.

[0088] The joint mounting hole (2) cooperates with the resistance wire perforation (6) to connect the resistance wire joint (3) at both ends of the polyethylene pipe section (1) and the resistance wire (5), the resistance wire joint (3) is parallel to the polyethylene pipe section (1), occupies small space, reduces the risk of falling caused by collision or extrusion, improves the stability of the connection, and does not damage the steel wire layer (4) during drilling, thereby reducing the pressure strength of the pipe section.

[0089] The hollow heating column (7) is coated with a heat insulating material, and the hollow support column (8) is coated with a heat insulating material, which can play a heat preservation role, prevent the heat of the heating coil (18) from being lost to the external environment after heating the heat-conducting rod (19), and reduce the heating effect of the cutting knife (10), thereby affecting the quality of the hot knife cutting slot.

[0090] The wall thickness of one end of the hollow heating column (7) is less than that of the other end, which can isolate the heat transfer between the machine tool spindle (18) and the heat-conducting rod (19), protect the machine tool spindle (16) from high temperature, and ensure the accuracy and stability of the machine tool.

[0091] The first guide roller (14) and the second guide roller (15) cooperate to guide the resistance wire (5), which can reduce the moving resistance of the resistance wire (5) and prevent the resistance wire (5) from being pulled out of the slot during embedding, thereby affecting the embedding quality.

[0092] The resistance wire pressing hole (11) matches the resistance wire clamping groove (20) to limit the resistance wire (5), so that the resistance wire (5) is placed below the cutter (10) after winding around the cutter (10), the risk of falling or deviation of the resistance wire (5) is reduced, and the stability of embedding the resistance wire (5) is improved.

[0093] The resistance wire (5) is embedded in the reinforced polyethylene pipe section (1) to form a reinforced polyethylene electric melting pipe fitting, a plurality of steel wire winding pipes are connected through the reinforced polyethylene electric melting pipe fitting, the pressure bearing capacity of the connection part is effectively improved, and the connection part is consistent with the steel wire winding pipe.

[0094] It should be noted that unless otherwise explicitly specified and limited, the terms "placed", "connected", and "linked" should be understood broadly, for example, can be a fixed connection mode such as flange connection, rivet connection, pin connection, adhesive connection and welding connection, can also be a detachable connection mode such as threaded connection, buckle connection and hinge connection, or integral connection, can also be electrical connection, or direct connection, or indirect connection through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0095] It should be further pointed out that in the description of the above specific embodiments, only the differences with other embodiments are described for simplicity and clarity, but those skilled in the art should know that the above specific embodiments themselves are also independent technical solutions.

Claims

1. A method of processing a reinforced polyethylene electrofusion pipe fitting, characterized in that: The reinforced polyethylene electric melting pipe fitting is formed by embedding resistance wires (5) in the inner wall of the reinforced polyethylene pipe, and specifically comprises the following steps: (1) producing a reinforced polyethylene pipe section (1) through a hot melting extrusion production line; (2) opening joint installation holes (2) in the pipe wall at both ends of the reinforced polyethylene pipe section (1), and opening resistance wire through holes (6) at positions corresponding to the joint installation holes (2); (3) clamping the reinforced polyethylene pipe section (1) on a numerical control machine tool so that the reinforced polyethylene pipe section (1) rotates together with the main shaft of the machine tool; (4) turning the inner circle of the reinforced polyethylene pipe section (1) through the numerical control machine tool to ensure the roundness of the inner diameter of the pipe section and prepare for the subsequent uniform embedding of the resistance wires (5); (5) installing a wire embedding tool on the spindle (16) of the numerical control machine tool, opening spiral cutting grooves in the inner wall of the reinforced polyethylene pipe section (1) through a cutting tool (10), embedding resistance wires (5) in the grooves, and embedding the resistance wires (5) through extrusion, heating the cutting tool through a heating assembly so that the polyethylene pipe wall on both sides of the cutting groove softens when the cutting tool performs spiral cutting, the resistance wires (5) are more easily embedded in the cutting groove, and the extrusion assembly compresses the softened polyethylene pipe wall on both sides of the cutting groove so that they can be more tightly fused together to embed the resistance wires (5), thereby forming the reinforced polyethylene electric melting pipe fitting; (6) dismounting the reinforced polyethylene electric melting pipe fitting from the numerical control machine tool, passing the ends of the resistance wires (5) into the joint installation holes (2) through the resistance wire through holes (6), and installing resistance wire joints (3) in the joint installation holes (2) and connecting with the resistance wires (5); the wire embedding tool comprises a heating assembly, a cutting groove assembly, and an extrusion assembly, the cutting groove assembly is arranged on the heating assembly, the extrusion assembly is arranged on the heating assembly, the heating assembly is installed on the numerical control machine tool, the cutting groove assembly performs spiral cutting on the reinforced polyethylene pipe section (1) and embeds the resistance wires (5) in the grooves at the same time, the extrusion assembly extrudes the cutting groove to embed the resistance wires (5), the heating assembly heats the cutting groove assembly so that the polyethylene pipe wall on both sides of the cutting groove softens when the cutting groove assembly performs spiral cutting, the resistance wires (5) are more easily embedded in the cutting groove, and the extrusion assembly compresses the softened polyethylene pipe wall on both sides of the cutting groove so that they can be more tightly fused together to embed the resistance wires (5), thereby preventing the resistance wires (5) from falling off from the cutting groove and improving the stability of the embedded resistance wires (5).The heating assembly is composed of a hollow heating column (7), a hollow support column (8), a cutter installation slot (9), a first wire guide roller (14), a second wire guide roller (15), a heating coil (18) and a heat conducting rod (19). One end of the hollow support column (8) is arranged at one end of the hollow heating column (7), the hollow support column (8) and the hollow heating column (7) are connected in communication, the other end of the hollow support column (8) is provided with the cutter installation slot (9), the cutter installation slot (9) and the hollow support column (8) are connected in communication, the heating coil (18) is arranged in the hollow heating column (7) and connected with the inner wall of the hollow heating column (7), the heat conducting rod (19) is arranged in the hollow heating column (7), the first wire guide roller (14) is rotatably arranged on the side wall of the other end of the hollow support column (8), the second wire guide roller (15) is rotatably arranged on the side wall of one end of the hollow heating column (7), the other end of the hollow heating column (7) is provided with a connecting slot (17), the slot wall of the connecting slot (17) is provided with a key groove, the hollow heating column (7) is connected with the machine tool spindle (16) through the connecting slot (17) and the key groove, the cutting slot assembly is composed of a cutter (10), a resistance wire pressing hole (11) and a resistance wire clamping groove (20), the cutter (10) is detachably arranged in the cutter installation slot (9), the cutter (10) is provided with the resistance wire pressing hole (11) on the cutter face, the cutter (10) is provided with the resistance wire clamping groove (20) on the side face, the extrusion assembly is composed of an extrusion roller (12) and a roller support (13), the extrusion roller (12) is rotatably arranged at the other end of the hollow support column (8) through the roller support (13).

2. A method of processing a reinforced polyethylene electrofusion pipe fitting according to claim 1, characterized in that The reinforced polyethylene electrofusion pipe fitting comprises a reinforced polyethylene pipe section (1), a resistance wire joint (3), a steel wire layer (4) and a resistance wire (5), the reinforced polyethylene pipe section (1) has a double-layer structure, the steel wire layer (4) is arranged between the inner layer pipe and the outer layer pipe, the steel wire layer (4) is formed by spirally winding steel wires on the inner layer pipe, the outer layer pipe completely covers the steel wire layer (4), the reinforced polyethylene pipe section (1) and the steel wire layer (4) jointly constitute the reinforced polyethylene pipe section (1), the resistance wire (5) is embedded on the inner wall of the reinforced polyethylene pipe section (1), the resistance wire (5) is spirally arranged on the inner wall of the reinforced polyethylene pipe section (1), the inner wall of the reinforced polyethylene pipe section (1) is provided with a spiral cutting groove, the resistance wire (5) is embedded in the spiral cutting groove, the spirally arranged resistance wire (5) has two sections, the two sections of the resistance wire (5) are respectively located at two ends of the reinforced polyethylene pipe section (1), the two sections of the resistance wire (5) are connected, the inner layer pipe and the outer layer pipe are formed by hot melting and extrusion, the steel wires are embedded on the inner layer pipe, the inner layer pipe and the outer layer pipe are adhered to each other, the distance from the steel wire layer (4) to the inner wall of the reinforced polyethylene pipe section (1) is greater than the distance from the steel wire layer (4) to the outer wall of the reinforced polyethylene pipe section (1), the pipe wall at each end of the reinforced polyethylene pipe section (1) is respectively provided with a joint mounting hole (2), the resistance wire joint (3) is arranged in the joint mounting hole (2), the reinforced polyethylene pipe section (1) is provided with a resistance wire perforation (6) at a position corresponding to the joint mounting hole (2) at each end, and the resistance wire (5) passes through the resistance wire perforation (6) and is connected with the resistance wire joint (3).

3. A method of processing a reinforced polyethylene electrofusion pipe fitting according to claim 1, characterized in that The hollow heating column (7) is coated with a heat insulation material, and the wall thickness of one end of the hollow heating column (7) is smaller than that of the other end.

4. A method of processing a reinforced polyethylene electrofusion pipe fitting according to claim 1, characterized in that The hollow supporting column (8) is coated with a heat insulation material, and the hollow supporting column (8) extends horizontally for a distance from one end to the other end and then extends obliquely to the other end after being bent.

5. A method of processing a reinforced polyethylene electrofusion pipe fitting according to claim 1, characterized in that The heat conduction rod (19) is located in the heating coil (18), one end of the heat conduction rod (19) is arranged on the inner wall of the other end of the hollow heating column (7), and the other end of the heat conduction rod (19) extends to the other end of the hollow supporting column (8) along the center line of the hollow heating column (7) and the hollow supporting column (8).

6. A method of processing a reinforced polyethylene electrofusion pipe fitting according to claim 1, characterized in that The cutting knife (10) and the heat conduction rod (19) are in contact.

7. A method of processing a reinforced polyethylene electrofusion pipe fitting according to claim 1, characterized in that The extrusion roller (12) is located on one side of the cutting knife (10), and the lowest point of the extrusion roller (12) is higher than the height of the cutting edge of the cutting knife (10).

8. A method of processing a reinforced polyethylene electrofusion pipe fitting according to claim 1, characterized in that The first guide wire roller (14) and the second guide wire roller (15) are matched to guide the resistance wire (5), which can reduce the moving resistance of the resistance wire (5) and prevent the resistance wire (5) from being pulled out of the cutting groove during embedding in the cutting groove, thereby affecting the embedding quality.

9. A method of processing a reinforced polyethylene electrofusion pipe fitting according to claim 1, characterized in that The resistance wire pressing hole (11) is matched with the resistance wire clamping groove (20) to limit the resistance wire (5), which can make the resistance wire (5) pass through the cutting knife (10) and be arranged below the cutting knife (10), thereby reducing the risk of falling or deviation of the resistance wire (5) and improving the stability of the embedding of the resistance wire (5).

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