Steel wire plastic coating equipment for polyethylene composite pipe processing

Abstract

The utility model provides steel wire plastic coating equipment for polyethylene composite pipe processing, which comprises an unreeling machine connected with one end of a steel wire and a reeling machine used for driving the other end of the steel wire to move, a steel wire plastic coating machine is arranged between the unreeling machine and the reeling machine, and the steel wire penetrates through the steel wire plastic coating machine. The heating device and the cooling device are arranged on the front side and the rear side of the steel wire plastic coating machine respectively; the cooling device comprises an inner cylinder and an outer cylinder arranged on the outer side of the inner cylinder, and a plurality of semiconductor chilling plates are arranged on the side portion of the inner cylinder in an annular array mode. According to the steel wire plastic-coated equipment for processing the polyethylene composite pipe, the plastic-coated steel wire in the inner cylinder is cooled through the cold end of the semiconductor chilling plate, heat at the hot end of the semiconductor chilling plate is taken away through the heat exchange cavity by heat exchange gas, the cooling efficiency is higher after the steel wire is plastic-coated, the occupied space of the cooling device is smaller, and the service life of the steel wire is prolonged. And the cooling effect of the cooling device is better, and the applicability of the steel wire plastic coating equipment is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of steel wire mesh skeleton plastic composite pipe production, in particular to a steel wire plastic coating device for processing polyethylene composite pipes. Background Art

[0002] The steel wire mesh skeleton plastic composite pipe is a new type of improved steel skeleton plastic composite pipe. This pipe is also called SRTP pipe. This new type of pipeline is made of high-strength plasticized steel wire mesh skeleton and thermoplastic polyethylene as raw materials. The steel wire winding net is used as the skeleton reinforcement of the polyethylene plastic pipe. It uses high-density polyethylene (HDPE) as the matrix and uses high-performance HDPE modified adhesive resin to tightly connect the steel wire skeleton with the inner and outer layers of high-density polyethylene, so that it has an excellent composite effect. Because the high-strength steel wire reinforcement is coated in continuous thermoplastic plastic, this composite pipe overcomes the shortcomings of steel pipes and plastic pipes. Before forming the steel wire winding net, the steel wire often needs to be coated with plastic first. The steel wire after plastic coating is processed into the steel wire winding net, so as to ensure the firm combination between polyethylene and the steel wire winding net.

[0003] Plastic coating of steel wire often requires preheating the steel wire first, then passing it through a steel wire plastic coating machine for plastic coating, then passing the plastic coated steel wire through a water tank for cooling, and then winding it up by a winder. However, the existing method of cooling the plastic coated steel wire not only takes up a large space, but also has low cooling efficiency. This solution solves this technical problem. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a steel wire plastic coating device for processing polyethylene composite pipes.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a steel wire plastic coating equipment for polyethylene composite pipe processing, comprising an unwinder connected to one end of the steel wire, a reel for driving the other end of the steel wire to move, a steel wire plastic coating machine is arranged between the unwinder and the reel, the steel wire passes through the steel wire plastic coating machine, and also includes a heating device and a cooling device respectively arranged on the front and rear sides of the steel wire plastic coating machine;

[0006] The cooling device includes an inner cylinder and an outer cylinder arranged outside the inner cylinder, a plurality of semiconductor refrigeration plates are arranged in a circular array on the side of the inner cylinder, the cold end of the semiconductor refrigeration plate is arranged toward the inside of the inner cylinder, and the hot end of the semiconductor refrigeration plate is arranged toward the outside of the inner cylinder, and a heat exchange cavity is formed between the outer cylinder and the inner cylinder, an air inlet is arranged at one end of the heat exchange cavity away from the steel wire plastic coating machine, and an exhaust port is arranged at a side of the heat exchange cavity close to the steel wire plastic coating machine, and heat exchange gas is transported in the heat exchange cavity.

[0007] The heat exchange gas is nitrogen, the heating device includes a heating coil and a quartz tube inserted into the heating coil, the steel wire is arranged through the inner side of the quartz tube, an air inlet 2 is arranged on the side of the quartz tube, and exhaust ports 2 are arranged at both ends of the quartz tube, and the exhaust port 1 is connected to the air inlet 2.

[0008] The heating coil is an electromagnetic induction heating coil.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] (1) The plastic-coated steel wire in the inner cylinder is cooled by the cold end of the semiconductor refrigeration sheet, and the heat of the hot end of the semiconductor refrigeration sheet is taken away through the heat exchange cavity by the heat exchange gas. The cooling efficiency of the steel wire after plastic coating is higher, and the cooling device occupies less space. The cooling temperature of the cooling device can be quickly adjusted by adjusting the power of the semiconductor refrigeration sheet. The cooling effect of the cooling device is better, and the applicability of the steel wire plastic coating equipment is stronger;

[0011] (2) The heat exchange gas is nitrogen, which is passed into the air inlet 2 of the quartz tube through the exhaust port 1 to protect the heated steel wire in the quartz tube, thereby preventing the steel wire from being oxidized in the air, thereby achieving a better plastic coating effect for the steel wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a process flow diagram of the utility model.

[0013] Among them, in the figure: 1, unwinding machine; 2, winding machine; 3, steel wire; 4, steel wire plastic coating machine; 5, inner cylinder; 6, outer cylinder; 7, semiconductor refrigeration plate; 8, heat exchange cavity; 9, quartz tube; 10, heating coil. DETAILED DESCRIPTION

[0014] In order to more clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0015] See also Figure 1 , a steel wire plastic coating equipment for polyethylene composite pipe processing, comprising an unwinding machine 1 connected to one end of a steel wire 3, a winding machine 2 for driving the other end of the steel wire 3 to move, a steel wire plastic coating machine 4 is arranged between the unwinding machine 1 and the winding machine 2, the steel wire 3 passes through the steel wire plastic coating machine 4, and also includes a heating device and a cooling device respectively arranged on the front and rear sides of the steel wire plastic coating machine 4;

[0016] The cooling device includes an inner cylinder 5 and an outer cylinder 6 arranged outside the inner cylinder 5. A plurality of semiconductor refrigeration plates 7 are arranged in a circular array on the side of the inner cylinder 5. The cold end of the semiconductor refrigeration plate 7 is arranged toward the inside of the inner cylinder 5, and the hot end of the semiconductor refrigeration plate 7 is arranged toward the outside of the inner cylinder 5. A heat exchange chamber 8 is formed between the outer cylinder 6 and the inner cylinder 5. An air inlet is arranged at one end of the heat exchange chamber 8 away from the steel wire coating machine 4, and an exhaust port is arranged on the side of the heat exchange chamber 8 close to the steel wire coating machine 4. Heat exchange gas is transported in the heat exchange chamber 8.

[0017] The heat exchange gas is nitrogen. The heating device includes a heating coil 10 and a quartz tube 9 inserted into the heating coil 10. The steel wire 3 is inserted into the inner side of the quartz tube 9. An air inlet 2 is provided on the side of the quartz tube 9. Exhaust ports 2 are provided at both ends of the quartz tube 9. Exhaust port 1 is connected to air inlet port 2.

[0018] The heating coil 10 is an electromagnetic induction heating coil.

[0019] The specific working process of this utility model:

[0020] When in use, the unwinder 1 and the rewinder 2 cooperate to complete the transportation of the steel wire 3. The steel wire 3 is first preheated by heating the heating coil 10, so that the steel wire 3 and the plastic coating material are more closely combined. After the steel wire 3 is plastic coated in the steel wire plastic coating machine 4, it passes through the inner cylinder 5 and is cooled by the cold end of the semiconductor refrigeration plate 7 on the side of the inner cylinder 5. The heat generated by the hot end of the semiconductor refrigeration plate 7 is transported to the quartz tube 9 through the second air inlet by the nitrogen flowing in the heat exchange chamber 8. The steel wire 3 is protected in the quartz tube 9 to prevent the steel wire 3 from being oxidized in the air. Finally, it is discharged to the atmosphere through the second exhaust port, wherein the second exhaust port close to the side of the steel wire plastic coating machine 4 can ensure that the steel wire 3 does not contact with the air before plastic coating, and the protection effect of the steel wire 3 is better.

[0021] After cooling, the plastic coated steel wire 3 can be wound up by the winder 2 . There is no moisture on the outside of the plastic coated steel wire 3 , thus avoiding the drying operation of the plastic coated steel wire 3 .

[0022] The plastic coated steel wire 3 in the inner tube 5 is cooled by the cold end of the semiconductor refrigeration sheet 7, and the heat of the hot end of the semiconductor refrigeration sheet 7 is taken away through the heat exchange cavity 8 by the heat exchange gas. The cooling efficiency of the steel wire 3 after plastic coating is higher, and the cooling device occupies less space. The cooling temperature of the cooling device can be quickly adjusted by adjusting the power of the semiconductor refrigeration sheet 7, the cooling effect of the cooling device is better, and the applicability of the steel wire plastic coating equipment is stronger.

[0023] The heat exchange gas is nitrogen, which is passed into the air inlet 2 of the quartz tube 9 through the exhaust port 1 to protect the heated steel wire 3 in the quartz tube 9 and avoid oxidation of the steel wire 3 in the air. The nitrogen also transfers the heat from the hot end of the semiconductor refrigeration plate 7 to the quartz tube 9 to have a thermal insulation effect, thereby making the plastic coating effect of the steel wire 3 better.

[0024] The semiconductor cooling sheet 7, also called a thermoelectric cooling sheet, is a heat pump. It has the advantages of no sliding parts and is used in some places where space is limited, reliability is high, and there is no refrigerant pollution. By using the Peltier effect of semiconductor materials, when direct current passes through a couple formed by two different semiconductor materials in series, heat can be absorbed and released at both ends of the couple, respectively, to achieve the purpose of refrigeration. It is a refrigeration technology that produces negative thermal resistance, which is characterized by no moving parts and relatively high reliability. The steel wire coating machine 4 and the semiconductor cooling sheet 7 are both prior arts and will not be described in detail here.

[0025] Technical features not described in the present invention can be achieved through or by adopting existing technologies, and will not be elaborated here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A steel wire plastic coating device for processing polyethylene composite pipes, comprising an unwinder (1) connected to one end of a steel wire (3), a reel (2) for driving the other end of the steel wire (3) to move, a steel wire plastic coating machine (4) being arranged between the unwinder (1) and the reel (2), the steel wire (3) passing through the steel wire plastic coating machine (4), characterized in that: It also includes a heating device and a cooling device respectively arranged on the front and rear sides of the steel wire plastic coating machine (4); The cooling device comprises an inner cylinder (5) and an outer cylinder (6) arranged outside the inner cylinder (5); a plurality of semiconductor refrigeration plates (7) are arranged in a circular array on the side of the inner cylinder (5); the cold end of the semiconductor refrigeration plate (7) is arranged toward the inside of the inner cylinder (5); the hot end of the semiconductor refrigeration plate (7) is arranged toward the outside of the inner cylinder (5); a heat exchange chamber (8) is formed between the outer cylinder (6) and the inner cylinder (5); an air inlet is arranged at one end of the heat exchange chamber (8) away from the steel wire plastic coating machine (4); an exhaust port is arranged at one side of the heat exchange chamber (8) close to the steel wire plastic coating machine (4); and heat exchange gas is transported in the heat exchange chamber (8).

2. The steel wire plastic coating equipment for polyethylene composite pipe processing according to claim 1, characterized in that: The heat exchange gas is nitrogen. The heating device comprises a heating coil (10) and a quartz tube (9) inserted into the heating coil (10). The steel wire (3) is inserted into the inner side of the quartz tube (9). A second air inlet is provided on the side of the quartz tube (9). Two exhaust ports are provided at both ends of the quartz tube (9). The first exhaust port is connected to the second air inlet.

3. The steel wire plastic coating equipment for polyethylene composite pipe processing according to claim 2, characterized in that: The heating coil (10) is an electromagnetic induction heating coil.

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