Process lubricating oil temperature accurate control device

Abstract

The utility model discloses a process lubricating oil temperature accurate control device which comprises an oil return pipe, an oil supply header pipe, a plurality of coolers and oil supply branch pipes, the oil return pipe is arranged on the upper portion of the side surface of the first cooler, the oil supply header pipe is arranged on the lower portion of the side surface of the last cooler, and a connecting pipe is arranged between every two adjacent coolers. One end of the connecting pipe is connected with the lower part of the side surface of the previous cooler, and the other end is connected with the upper part of the side surface of the next cooler. Each cooler controls the flow of cooling liquid entering the cooler through an electric proportional valve, so that the cooling efficiency of the cooler is controlled, the temperature of lubricating oil passing through an outlet of the cooler is accurately controlled, and the temperature in each cooler can be adjusted and controlled more accurately by adopting the multiple coolers; and the requirements of different non-ferrous metal rolling temperatures can be met, and the quality of final products is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of nonferrous metal rolling, in particular to a device for accurately controlling the temperature of process lubricating oil. Background Art

[0002] The selection of rolling temperature for nonferrous metals will affect the hardness, ductility and cold working properties of the metal materials. Different temperatures will lead to different properties of the materials. Therefore, the temperature control of the rolled material is particularly important in the nonferrous metal rolling process. The temperature control of the rolled material is mainly carried out through the temperature of the rolling oil in the process lubrication system. Most of the existing process lubricating oil temperature control devices are not easy to control accurately, resulting in the lubricating oil temperature not being able to meet the needs of nonferrous metal rolling well, affecting the quality of the final product. To this end, we propose a process lubricating oil temperature precision control device. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a device for accurately controlling the temperature of process lubricating oil. Using multiple coolers can make the temperature regulation and control in each cooler more precise, can meet the requirements of different non-ferrous metal rolling temperatures, ensure the quality of the final product, and can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a precise control device for process lubricating oil temperature, comprising an oil return pipe, an oil supply main pipe, a plurality of coolers and an oil supply branch pipe, the oil return pipe is arranged on the upper part of the side surface of the first cooler, the oil supply main pipe is arranged on the lower part of the side surface of the last cooler, and connecting pipes are arranged between adjacent coolers, one end of the connecting pipe is connected to the lower part of the side surface of the previous cooler, and the other end is connected to the upper part of the side surface of the next cooler, and a serpentine pipe for connecting the oil return pipe and the connecting pipe or for connecting the connecting pipe and the oil supply main pipe is arranged inside the cooler; a three-way valve is arranged on the connecting pipe, and three interfaces of the three-way valve are respectively connected to the oil supply branch pipe and the connecting pipes on both sides; a liquid inlet pipe and a liquid return pipe are respectively arranged on the side surfaces of the coolers, and an electrical proportional valve is arranged on the liquid inlet pipe.

[0005] As a preferred technical solution of the utility model, the oil return pipe and the upper part of the connecting pipe are both provided with oil return temperature sensors, and the lower parts of the oil supply main pipe and the connecting pipe are both provided with oil supply temperature sensors.

[0006] As a preferred technical solution of the utility model, the outer side of the connecting pipe, the outer side of the oil supply branch pipe and the outer side of the oil supply main pipe are all provided with insulation sleeves.

[0007] As a preferred technical solution of the utility model, the outer shell of the cooler includes an outer wall layer and an inner wall layer, and a thermal insulation layer is arranged between the outer wall layer and the inner wall layer.

[0008] As a preferred technical solution of the utility model, the thermal insulation layer is a vacuum layer or a mineral wool layer or a glass wool layer.

[0009] Compared with the prior art, the beneficial effects of the utility model are as follows: by setting up multiple coolers, the lubricating oil is cooled multiple times, and the cooling temperatures of the multiple coolers are gradually reduced. The lubricating oil enters the serpentine pipe in the cooler from the return oil pipe for cooling. After cooling, it enters the next cooler through the connecting pipe or is discharged from the oil supply pipe and transported to the rolling equipment. According to the temperature requirements of the rolled non-ferrous metals, the lubricating oil is cooled by a corresponding number of coolers. Each cooler controls the flow rate of the coolant entering the cooler through an electrical proportional valve, thereby controlling the cooling efficiency of the cooler, and then accurately controlling the temperature of the lubricating oil passing through the cooler outlet. The use of multiple coolers can make the temperature regulation and control in each cooler more precise, which can meet the requirements of different non-ferrous metal rolling temperatures and ensure the quality of the final product. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 It is a side view structural schematic diagram of the utility model;

[0012] Figure 3 It is a schematic diagram of the internal structure of the cooler of the utility model.

[0013] In the figure: 1 cooler, 2 oil return pipe, 3 connecting pipe, 4 oil supply branch pipe, 5 three-way valve, 6 oil return temperature sensor, 7 oil supply temperature sensor, 8 liquid inlet pipe, 9 electric proportional valve, 10 oil supply main pipe, 11 liquid return pipe, 12 insulation sleeve, 13 serpentine pipe, 14 outer wall layer, 15 inner wall layer, 16 thermal insulation layer. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] See also Figure 1-3The utility model provides a technical solution: a precise control device for process lubricating oil temperature, comprising an oil return pipe 2, an oil supply main pipe 10, a plurality of coolers 1 and an oil supply branch pipe 4, the number of coolers 1 is one more than the number of oil supply branch pipes 4, the oil return pipe 2 is arranged at the upper part of the side surface of the first cooler 1, and is used to send the rolling oil back for cooling; the oil supply branch pipe 4 and the oil supply main pipe 10 are both connected to the corresponding oil inlet pipe ports on the rolling equipment, and the oil supply main pipe 10 is arranged at the lower part of the side surface of the last cooler 1. When the lubricating oil needs to be cooled to a lower temperature, the lubricating oil passes through all coolers 1 and is discharged from the oil supply main pipe 10 and transported to the rolling equipment.

[0016] A connecting pipe 3 is provided between adjacent coolers 1, one end of the connecting pipe 3 is connected to the lower side surface of the previous cooler 1, and the other end is connected to the upper side surface of the next cooler 1. It is used to connect adjacent coolers 1 and plays a role when the lubricating oil needs to be cooled multiple times.

[0017] A serpentine tube 13 is provided inside the cooler 1 for connecting the return oil pipe 2 and the connecting pipe 3 or for connecting the connecting pipe 3 and the oil supply main pipe 10. The serpentine tube 13 is generally in the shape of a plurality of "S"s connected end to end, which prolongs the flow time of the lubricating oil in the cooler 1, thereby improving its cooling effect.

[0018] A three-way valve 5 is provided on the connecting pipe 3, and the three-way valve 5 is preferably an electric three-way valve. The three interfaces of the three-way valve 5 are respectively connected to the oil supply branch pipe 4 and the connecting pipes 3 on both sides. For example, when the cooler 1 is provided with three, and the oil supply branch pipe 4 and the three-way valve 5 are both provided with two, the temperature adjustment is divided into high, medium and low. When the temperature is adjusted to high, the first three-way valve 5 is adjusted to make the connecting pipe 3 connected to the oil supply branch pipe 4 and closed to the connecting pipe 3 on the other side, and the lubricating oil enters the serpentine pipe 13 in the first cooler 1 from the return oil pipe 2 for cooling, and then enters the oil supply branch pipe 4 from the connecting pipe 3, and then is transported to the rolling equipment; when the temperature is adjusted to medium, the first three-way valve 5 is adjusted to make the first oil supply branch pipe 4 closed, and the connecting pipes 3 on both sides are connected. At the same time, the second three-way valve 5 is adjusted to make the connecting pipe 3 connected to the corresponding oil supply branch pipe 4 and closed to the connecting pipe 3 on the other side, and the lubricating oil enters the serpentine pipe 13 in the first cooler 1 from the return oil pipe 2 After being cooled in the serpentine tube 13, the lubricating oil enters the serpentine tube 13 in the second cooler 1 through the first connecting pipe 3 for secondary cooling, and then enters the second oil supply branch pipe 4 through the second connecting pipe 3 to transport the medium-temperature lubricating oil to the rolling equipment; when the temperature is adjusted to a low gear, the first three-way valve 5 and the second three-way valve 5 are adjusted to close the corresponding oil supply branch pipe 4, and all connecting pipes 3 are connected. The lubricating oil enters the serpentine tube 13 in the first cooler 1 from the return oil pipe 2 and is cooled, and then enters the serpentine tube 13 in the second cooler 1 through the first connecting pipe 3 for secondary cooling, and then enters the serpentine tube in the third cooler 1 through the second connecting pipe 3 for tertiary cooling. Finally, the low-temperature lubricating oil that has been cooled thrice is transported from the oil supply main pipe 10 to the rolling equipment to cool the non-ferrous metals.

[0019] The side surfaces of the cooler 1 are respectively provided with a liquid inlet pipe 8 and a liquid return pipe 11. The liquid inlet pipe 8 is provided with an electrical proportional valve 9, whose input signal is an analog quantity of 4~20mA. The flow rate of the coolant entering the cooler 1 is controlled by controlling the opening degree, and the cooling efficiency of the cooler is controlled. The lubricating oil is cooled multiple times by setting multiple coolers 1, and the cooling temperatures of the multiple coolers 1 are gradually reduced. The lubricating oil enters the serpentine pipe 13 in the cooler 1 from the return pipe 2 for cooling. After cooling, it enters the next cooler 1 through the connecting pipe 3 or is discharged from the oil supply branch pipe 4 and transported to the rolling equipment. According to the temperature requirements of the rolled non-ferrous metals, the lubricating oil is cooled by a corresponding number of coolers 1. Each cooler 1 controls the flow rate of the coolant entering the cooler 1 through the electrical proportional valve 9, thereby controlling the cooling efficiency of the cooler 1, and then accurately controlling the temperature of the lubricating oil passing through the outlet of the cooler 1. The use of multiple coolers 1 can make the temperature regulation and control in each cooler 1 more accurate, which can meet the requirements of different non-ferrous metal rolling temperatures and ensure the quality of the final product.

[0020] According to the preferred technical solution, the return oil pipe 2 and the upper part of the connecting pipe 3 are both provided with a return oil temperature sensor 6, and the lower part of the oil supply main pipe 10 and the connecting pipe 3 are both provided with an oil supply temperature sensor 7, which are respectively used to detect the temperature of the lubricating oil when entering and leaving the cooler 1, and the return oil temperature sensor 6 and the electric proportional valve 9 form a closed-loop control. Specifically, the three-way valve 5, the electric proportional valve 9, the return oil temperature sensor 6, the oil supply temperature sensor 7, etc. used in the present application are all electrically connected to the external control system, and the external control system controls the opening degree of the electric proportional valve 9 on the corresponding cooler 1 according to the temperature values ​​detected by each return oil temperature sensor 6 and the oil supply temperature sensor 7, and accurately controls the flow rate of cooling water to control the temperature of the rolling oil in the process lubrication system, thereby achieving accurate temperature control of the rolled material.

[0021] The three-way valve 5, electric proportional valve 9, return oil temperature sensor 6, supply oil temperature sensor 7, etc. used in this application are all electronic components commonly used in the prior art. Their specific structures, working principles, circuit connections, etc. are all well-known technologies and will not be described in detail here.

[0022] After the target temperature is set in the control system, when the actual temperature of the return oil temperature sensor 6 is higher than the target temperature, the electric control system will perform PID adjustment on the electric proportional valve 9. When the initial temperature is too high, the PID adjustment electric proportional valve increases the opening of the proportional valve, increases the flow of the plate cooler, and thus reduces the outlet temperature of the plate cooler. When the outlet temperature of the cooler approaches the set target temperature of the system, the electric control system reduces the opening of the electric proportional valve to control the flow of cooling water on the cold side of the cooler, and accurately controls the temperature of the hot side fluid to approach the set temperature of the system.

[0023] According to the preferred technical solution, the outer side of the connecting pipe 3, the outer side of the oil supply branch pipe 4 and the outer side of the oil supply main pipe 10 are all provided with an insulation sleeve 12, which is used to reduce the heat exchange between the cooled lubricating oil and the outside, thereby avoiding the temperature rise caused by the external high temperature during the transportation process, and further ensuring the temperature control accuracy of the lubricating oil; while the insulation sleeve 12 is not provided on the outer side of the return oil pipe 2 and the serpentine pipe 13, wherein the return oil pipe 2 is not provided with an insulation sleeve so that it can achieve a certain cooling effect through natural heat dissipation in the process of returning to the cooler 1, and the serpentine pipe 13 is used to increase the heat exchange between the internal and the coolant in the cooler 1, so as to facilitate rapid cooling.

[0024] According to a preferred technical solution, the outer shell of the cooler 1 includes an outer wall layer 14 and an inner wall layer 15, and a thermal insulation layer 16 is provided between the outer wall layer 14 and the inner wall layer 15. The thermal insulation layer 16 improves the thermal insulation effect of the cooler 1 and reduces the heat exchange between the internal coolant and the outside, thereby improving the cooling effect and saving electricity resources.

[0025] According to a further preferred technical solution, the thermal insulation layer 16 is a vacuum layer or a mineral wool layer or a glass wool layer, and other commonly used thermal insulation materials can also be used, all of which can achieve effective thermal insulation effects.

[0026] The undisclosed parts in the present utility model are all prior art, and their specific structures, materials and working principles are not described in detail. Although the embodiments of the present utility model have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the attached claims and their equivalents.

Claims

1. A device for accurately controlling the temperature of process lubricating oil, characterized in that: The invention comprises an oil return pipe (2), an oil supply main pipe (10), a plurality of coolers (1) and an oil supply branch pipe (4), wherein the oil return pipe (2) is arranged at the upper part of the side surface of the first cooler (1), the oil supply main pipe (10) is arranged at the lower part of the side surface of the last cooler (1), and a connecting pipe (3) is arranged between adjacent coolers (1), one end of the connecting pipe (3) is connected to the lower part of the side surface of the previous cooler (1), and the other end is connected to the upper part of the side surface of the next cooler (1). The cooler (1) is provided with a serpentine pipe (13) for connecting the oil return pipe (2) and the connecting pipe (3) or for connecting the connecting pipe (3) and the oil supply main pipe (10); the connecting pipe (3) is provided with a three-way valve (5), and the three interfaces of the three-way valve (5) are respectively connected to the oil supply branch pipe (4) and the connecting pipes (3) on both sides; the side surfaces of the cooler (1) are respectively provided with a liquid inlet pipe (8) and a liquid return pipe (11), and the liquid inlet pipe (8) is provided with an electric proportional valve (9).

2. The device for accurately controlling the temperature of process lubricating oil according to claim 1, characterized in that: The oil return pipe (2) and the upper part of the connecting pipe (3) are both provided with an oil return temperature sensor (6), and the lower part of the oil supply main pipe (10) and the connecting pipe (3) are both provided with an oil supply temperature sensor (7).

3. The device for accurately controlling the temperature of process lubricating oil according to claim 1, characterized in that: The outer side of the connecting pipe (3), the outer side of the oil supply branch pipe (4) and the outer side of the oil supply main pipe (10) are all provided with a heat-insulating sleeve (12).

4. The device for accurately controlling the temperature of process lubricating oil according to claim 1 is characterized in that: The outer shell of the cooler (1) comprises an outer wall layer (14) and an inner wall layer (15), and a heat-insulating layer (16) is provided between the outer wall layer (14) and the inner wall layer (15).

5. The device for accurately controlling the temperature of process lubricating oil according to claim 4 is characterized in that: The thermal insulation layer (16) is a vacuum layer or a mineral wool layer or a glass wool layer.

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