A direct current cooling system for wire drawing machine

Abstract

The application provides a direct current cooling system for a wire drawing machine, which is used for cooling the wire drawing machine and an electric control cabinet. The wire drawing machine comprises a plurality of die boxes, a motor and a winding drum. The direct current cooling system has an independent cooling system and a circulating cooling system. The independent cooling system comprises a cooling water inlet pipe group, a cooling water return pipe group and a heat exchanger. The heat exchanger is connected to the cooling water inlet pipe group. The cooling water inlet pipe group is used for connecting to cooling water and conveying the cooling water to water inlets of the die boxes and the winding drum. The cooling water return pipe group is connected to water outlets of the die boxes and the winding drum and is used for conveying the heated cooling water in the die boxes and the winding drum to outside. The circulating cooling system comprises a circulating water inlet pipe group and a circulating water return pipe group. The circulating water inlet pipe group is used for conveying the cold water in the heat exchanger to water inlets of the motor and the electric control cabinet. The circulating water return pipe group is used for connecting water outlets of the motor and the electric control cabinet and conveying the hot water to the heat exchanger to obtain cold water. The application can reduce energy consumption and space occupation.

Description

Technical Field

[0001] This invention relates to the field of drawing material cooling technology, and in particular to a DC cooling system for wire drawing machines. Background Technology

[0002] Steel cord is a fine-gauge steel wire strand or rope made of high-quality high-carbon steel with a brass-plated surface and special purpose. It is mainly used as a skeleton material for passenger car tires, light truck tires, heavy truck tires, construction machinery tires, aircraft tires, and other rubber products.

[0003] The raw material for steel cord needs to be drawn into fine steel wires of the required specifications by a wire drawing machine. Most wire drawing machines currently use permanent magnet direct drive wire drawing machines, which require a cooling system to maintain the normal operation of the equipment. The current cooling system uses multiple independent circulation pipelines, making the overall pipeline system complex, energy-intensive, and space-consuming, which has its shortcomings. Summary of the Invention

[0004] To avoid the shortcomings of existing technologies, this invention provides a DC cooling system for wire drawing machines that can significantly reduce energy consumption and space requirements.

[0005] The present invention solves the technical problem by adopting the following technical solution: a DC cooling system for a wire drawing machine, used to cool the wire drawing machine and the electrical control cabinet, wherein the wire drawing machine includes multiple mold boxes, a motor and a drum, and the DC cooling system has an independent cooling system and a circulating cooling system;

[0006] The independent cooling system includes a cooling water inlet pipe assembly, a cooling water return pipe assembly, and a heat exchanger. The heat exchanger is connected to the cooling water inlet pipe assembly, which is used to receive cooling water and deliver the cooling water to the inlets of the mold box and the drum. The cooling water return pipe assembly is connected to the outlets of the mold box and the drum and allows the heated cooling water inside both to flow out.

[0007] The circulating cooling system includes a circulating water inlet pipe group and a circulating water return pipe group. Both the circulating water inlet pipe group and the circulating water return pipe group are connected to a heat exchanger. The circulating water inlet pipe group is used to transport cold water in the heat exchanger to the water inlet of the motor and the electrical control cabinet. The circulating water return pipe group is used to connect the water outlet of the motor and the electrical control cabinet and transport hot water to the heat exchanger for cooling to obtain cold water.

[0008] In several embodiments, the cooling water inlet pipe assembly includes a main pipe and two branch pipes, the branch pipes being connected to the main pipe and respectively connected to the mold box and the drum, and the main pipe being connected to the heat exchanger.

[0009] In several embodiments, an expansion pipe and a pressure relief valve are provided at the tail end of the circulating return water pipe assembly connected to the heat exchanger.

[0010] In several embodiments, a water purifier, a pressure water supply valve, and a centrifugal pump are provided at the beginning of the circulating water inlet pipe assembly connected to the heat exchanger.

[0011] In several embodiments, the circulating water inlet pipe assembly includes a water intake section, a drainage section, and a water passage section;

[0012] The water intake section includes a first water intake pipe and a second water intake pipe. One end of the first water intake pipe is connected to the inlet of the centrifugal pump, and the other end of the first water intake pipe is connected to the cooling water inlet pipe group. The second water intake pipe is connected between the first water intake pipe and the outlet of the heat exchanger.

[0013] One end of the water passage is connected to the outlet of the centrifugal pump, and the other end of the water passage extends to the water inlet of the electrical control cabinet and each motor.

[0014] The drainage section is connected to the water passage section and extends to the cooling return water pipe assembly. A drain valve is provided on the drainage section.

[0015] The present invention has the following beneficial effects:

[0016] This invention combines an independent cooling system with a circulating cooling system, which can cool the mold box and the roll, as well as the motor and the electrical control cabinet, respectively. The two cooling systems are combined, and the independent cooling system cools the circulating cooling system to achieve the recycling of the cooling water in the circulating cooling system. This can reduce the energy consumption of cooling water circulation by about 40%, and can achieve automatic water replenishment, pressure protection, and maintenance-free operation. Attached Figure Description

[0017] The accompanying drawings described herein are for illustrative purposes only and do not represent all possible implementations, nor should they be considered as limiting the scope of the invention.

[0018] Figure 1 The structure of the DC cooling system for the wire drawing machine in Embodiment 1 is illustrated schematically;

[0019] Figure 2 Schematic illustration Figure 1 The structure of the independent cooling system in the middle;

[0020] Figure 3 Schematic illustration Figure 1 Structure of a central circulation cooling system;

[0021] Figure 4 Schematic illustration Figure 3 Enlarged structure of the central water intake section

[0022] Figure 5 The structure of the DC cooling system for the wire drawing machine in Embodiment 2 is illustrated schematically;

[0023] Figure 6 Schematic illustration Figure 5 A planar structure. Detailed Implementation

[0024] The embodiments of the present invention will be described in detail below. In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0025] Therefore, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] The terminology used herein is intended to explain the embodiments and is not intended to limit and / or restrict the invention.

[0027] Example 1

[0028] like Figure 1 As shown, the DC cooling system in this embodiment is used to cool the wire drawing machine and the electrical control cabinet 14. The main cooling parts of the wire drawing machine are the mold box 11, the motor 12 and the drum 13. A drawing module is composed of a single mold box 11, motor 12 and drum 13. Here, four drawing modules are arranged in a straight line to achieve the drawing of steel wire.

[0029] Specifically, the DC cooling system consists of a combined independent cooling system and a circulating cooling system.

[0030] like Figure 2 As shown, the independent cooling system includes a cooling water inlet pipe group 21, a cooling water return pipe group 22, and a heat exchanger 23. The heat exchanger adopts a spiral shell-and-tube heat exchanger structure. For ease of understanding, the cooling water inlet pipe group 21 is represented by a solid line, and the cooling water return pipe group 22 is represented by a dashed line. Both are water pipe structures.

[0031] The heat exchanger 23 is connected to the cooling water inlet pipe group 21, which is used to connect to the cooling water and deliver the cooling water to the water inlet of the mold box 11 and the drum 13. The cooling water return pipe group 22 is connected to the water outlet of the mold box 11 and the drum 13 and allows the heated cooling water inside both to flow out.

[0032] That is, the first end of the cooling water inlet pipe assembly 21 is connected to an external cooling water source, while the end of the cooling water return pipe assembly 22 is connected to an external recovery container to discharge the heated cooling water.

[0033] The cooling water inlet pipe group 21 mainly consists of a main pipe 211 and two branch pipes 212. The main pipe 211 is connected to the heat exchanger 23. The two branch pipes 212 are connected to the main pipe 211 and respectively connected to the water inlet positions of the mold box 11 and the drum 13. Thus, cooling water can be delivered to the mold box 11 and the drum 13 for cooling. The two branch pipes 212 are arranged in parallel.

[0034] like Figures 3-4 As shown, the circulating cooling system includes a circulating water inlet pipe group 31 and a circulating water return pipe group 32. Both the circulating water inlet pipe group 31 and the circulating water return pipe group 32 are connected to the heat exchanger 23. The circulating water inlet pipe group 31 is used to transport the cold water in the heat exchanger 23 to the water inlet of the motor 12 and the electrical control cabinet 14. The circulating water return pipe group 32 is used to connect the water outlet of the motor 12 and the electrical control cabinet 14 and transport the hot water to the heat exchanger 23 for cooling to obtain cold water.

[0035] Similarly, for ease of understanding, the circulating water inlet pipe group 31 is represented by a solid line, and the circulating water return pipe group 32 is represented by a dashed line; both are water pipe structures.

[0036] Specifically, the circulating water inlet pipe assembly 31 includes a water intake section 31a, a drainage section 31b, and a water passage section 31c.

[0037] The water intake section 31a includes a first water intake pipe 311 and a second water intake pipe 312. One end of the first water intake pipe 311 is connected to the inlet of the centrifugal pump 37, and the other end of the first water intake pipe 311 is connected to the cooling water inlet pipe group 21. The second water intake pipe 312 is connected between the first water intake pipe 311 and the outlet of the heat exchanger 23. During normal circulation, the centrifugal pump 37 draws the cooled circulating water from the heat exchanger 23 through the second water intake pipe 312. At the same time, a water purifier 35 and a pressure water supply valve 36 are configured on the first water intake pipe 311 and between the second water intake pipe 312 and the cooling water inlet pipe group 21. When the circulating water volume is insufficient, the pressure water supply valve 36 opens to directly supplement the water source from the cooling water inlet pipe group 21, and the water purifier 25 filters the supplemented water to ensure cleanliness.

[0038] Furthermore, one end of the water-passing section 31c is connected to the outlet of the centrifugal pump, and the other end of the water-passing section 31c extends to the water inlet of the electrical control cabinet 14 and each motor 12, that is, cooling water is delivered to the electrical control cabinet 14 and each motor 12 for cooling through the water-passing section 31c.

[0039] In addition, the drainage section 31b is connected to the water passage section 31c and extends to the cooling water return pipe group 22, and the drainage section 31b is provided with a drain valve 313.

[0040] The end of the circulating return water pipe group 32 connected to the heat exchanger 23 is equipped with an expansion pipe 33 and a pressure relief valve 34. The circulating return water pipe group 32 is connected to the drainage section 31b through the pressure relief valve 34. That is, when the water pressure in the circulating return water pipe group 32 is too high, some water can be discharged through the pressure relief valve 34 to maintain the water pressure.

[0041] In use, external cooling water is first introduced, and the cooling water enters both the independent cooling system and the circulating cooling system. The independent cooling system cools the mold box 11 and the roll 13. After cooling the mold box 11 and the roll 13, the cooling water in the independent cooling system is discharged directly. At the same time, the circulating cooling system cools the electrical control cabinet 14 and the motor 12. After a complete cooling and heating process, the cooling water in the circulating cooling system flows back to the heat exchanger 23 in the independent cooling system to exchange heat with the continuously entering external cooling water and cool down. The cooled circulating cooling water continues to cool the electrical control cabinet 14 and the motor 12. The temperature of the external cooling water will rise to a certain extent after heat exchange, but it is still sufficient to meet the cooling conditions of the mold box 11 and the roll 13.

[0042] Example 2

[0043] like Figure 5-6 As shown, the difference from Embodiment 1 is that the number of drawing modules has been increased. As the number of drawing modules increases, the overall length of the cooling system increases synchronously. Here, nine drawing modules are set. Of course, there can be fewer or more. The pipes in the cooling system can be lengthened accordingly.

[0044] The examples, embodiments, and particular forms of the invention illustrated have been shown and described in detail in the accompanying drawings and foregoing description, and should also be considered illustrative rather than restrictive. The description of a particular feature in one embodiment does not imply that those particular features must be limited to that one embodiment. Features of one embodiment can be used in combination with features of other embodiments, as will be understood by those skilled in the art, whether or not explicitly stated. Exemplary embodiments have been shown and described, and all variations and modifications fall within the spirit of the invention and are intended to be protected.

Claims

1. A direct cooling system for wire drawing machine, which is used to cool the wire drawing machine and the electric control cabinet, the wire drawing machine comprising a plurality of die boxes, motors and winding drums, characterized in that, the direct cooling system comprises an independent cooling system and a circulating cooling system; the independent cooling system comprises a cooling water inlet pipe group, a cooling water outlet pipe group and a heat exchanger, the heat exchanger is connected to the cooling water inlet pipe group, the cooling water inlet pipe group is used to connect to cooling water and deliver the cooling water to the water inlets of the die boxes and the winding drums, the cooling water outlet pipe group is connected to the water outlets of the die boxes and the winding drums and is used to deliver the heated cooling water in the die boxes and the winding drums to the outside; the circulating cooling system comprises a circulating water inlet pipe group and a circulating water outlet pipe group, both of which are connected to the heat exchanger, the circulating water inlet pipe group is used to deliver the cold water in the heat exchanger to the water inlets of the motors and the electric control cabinet, and the circulating water outlet pipe group is used to connect the water outlets of the motors and the electric control cabinet and deliver the hot water to the heat exchanger to be cooled to obtain cold water; in use, the external cooling water is first introduced, the cooling water enters the independent cooling system and the circulating cooling system respectively, the die boxes and the winding drums are cooled by the independent cooling system, the cooling water in the independent cooling system is directly discharged after cooling the die boxes and the winding drums, at the same time, the electric control cabinet and the motors are cooled by the circulating cooling system, the cooling water in the circulating cooling system is returned to the heat exchanger in the independent cooling system and is cooled by the continuously introduced external cooling water, and the cooled circulating cooling water continues to cool the electric control cabinet and the motors.

2. The direct cooling system for wire drawing machine according to claim 1, characterized in that, the cooling water inlet pipe group comprises a main pipe and two branch pipes, the branch pipes are connected to the main pipe and are connected to the die boxes and the winding drums respectively, and the main pipe is connected to the heat exchanger.

3. The direct cooling system for wire drawing machine according to claim 2, characterized in that, the tail end of the circulating water outlet pipe group connected to the heat exchanger is provided with an expansion pipe and a pressure relief valve.

4. The direct cooling system for wire drawing machine according to claim 3, characterized in that, the head end of the circulating water inlet pipe group connected to the heat exchanger is provided with a water purifier, a pressure make-up valve and a centrifugal pump.

5. The direct cooling system for wire drawing machine according to claim 4, characterized in that, the circulating water inlet pipe group comprises a water taking part, a water discharging part and a water passing part; the water taking part comprises a first water taking pipe and a second water taking pipe, one end of the first water taking pipe is connected to the inlet of the centrifugal pump, the other end of the first water taking pipe is connected to the cooling water inlet pipe group, and the second water taking pipe is connected between the first water taking pipe and the water outlet of the heat exchanger; one end of the water passing part is connected to the outlet of the centrifugal pump, and the other end of the water passing part extends to the water inlets of the electric control cabinet and the motors; the water discharging part is connected to the water passing part and extends to the cooling water outlet pipe group, and a water discharging valve is arranged on the water discharging part.

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