Low-energy-consumption cooling circulation system

Abstract

The low-energy-consumption cooling circulation system comprises a bottom frame, and a water tank is fixedly mounted on the bottom frame; a first water pump, a second water pump and a heat exchanger are further fixedly installed on the bottom frame, an input port of the first water pump is connected with the water tank, an output port of the first water pump is connected with a normal-temperature pipeline, and the normal-temperature pipeline extends to the high-temperature area and sprays and cools semi-finished tires in the high-temperature area through a spraying head connected to the normal-temperature pipeline; the normal-temperature pipeline is further connected to a first input port of a first electromagnetic valve, an output port of the first electromagnetic valve is connected with a cooling pipeline arranged in the low-temperature area, and the cooling pipeline conducts spraying cooling in the low-temperature area through a correspondingly-connected spraying head. A second input port of the first electromagnetic valve is connected with an output port of the heat exchanger; an input port of the heat exchanger is connected with the water tank through a second water pump; the first electromagnetic valve is used for controlling the heat exchanger output water or the first water pump output water connected into the cooling pipeline; therefore, heat exchangers are reduced or even stopped, and energy consumption is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial cooling circulation, in particular to a low-energy-consumption cooling circulation system. BACKGROUND

[0002] In the tire manufacturing process, especially in the production line of tire semi-finished products (such as tread, sidewall and other extruded parts), the high-temperature extruded semi-finished products need to go through a cooling process. At present, the commonly used cooling method is to use cooling water to directly spray and cool the running tire semi-finished products through a spraying device. The traditional cooling system often uses a single continuous cooling method, in which the cooling water is provided by a cold water unit in the factory and then the cooling water used for cooling the tire semi-finished products is obtained through a heat exchanger. Although this method can meet the cooling demand, the energy consumption is extremely high. The refrigeration unit needs to be continuously operated to maintain the supply of low-temperature cooling water. However, not all process sections require such low temperature, especially in the high-temperature zone of the front section where the semi-finished product temperature is high. Using deep cooling water will result in waste of energy.

[0003] In addition, the fouling of the heat exchange wall surface inside the heat exchanger leads to the formation of fouling thermal resistance and the reduction of the flow passage, thereby affecting the heat exchange performance and the flow efficiency of the water. At the same time, the temperature of the cooling water will rise during the circulation process, and the refrigeration unit needs to work continuously to provide cooling water for the heat exchanger to cool it to the set low temperature. The entire system is always in a high-load operation state, resulting in huge power consumption and high operating cost.

[0004] Therefore, it is necessary to provide a cooling circulation system which can intelligently adjust according to the actual cooling demand and effectively reduce energy consumption. SUMMARY

[0005] The present application aims to provide a low-energy-consumption cooling circulation system to solve the problems raised in the background.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A low-energy-consumption cooling circulation system, characterized in that: the system comprises a high-temperature zone, a low-temperature zone and a complete set of pipelines for providing cooling spraying water to the high-temperature zone and the low-temperature zone at the same time, wherein a valve is connected in the middle of the pipeline, which is used to control the combination of the complete set of pipelines into a single spraying water path or the separation of the complete set of pipelines into two independent spraying water paths; the two spraying water paths are connected to a water source through two water pumps for water supply.

[0008] Further, the single spray water path directly outputs normal temperature water to the high temperature area and the low temperature area without passing through the heat exchanger; one of the two spray water paths directly outputs normal temperature water to the high temperature area without passing through the heat exchanger, and the other one outputs chilled water to the low temperature area by passing through the heat exchanger.

[0009] Further, the valve is a first electromagnetic valve, and the two water pumps are a first water pump and a second water pump respectively; the system further comprises a chassis, and a water tank for water storage is fixedly installed on the chassis; the first water pump, the second water pump and the heat exchanger are also fixedly installed on the chassis, the input port of the first water pump is connected to the water tank, and the output port of the first water pump is connected to a normal temperature pipeline, which extends to the high temperature area and sprays and cools the tire semi-finished product in the high temperature area through a spray head connected to the normal temperature pipeline; the normal temperature pipeline is also connected to a first input port of the first electromagnetic valve, and the output port of the first electromagnetic valve is connected to a cooling pipeline arranged in the low temperature area, which sprays and cools in the low temperature area through a corresponding spray head; the second input port of the first electromagnetic valve is connected to the output port of the heat exchanger, and the input port of the heat exchanger is connected to the water tank through the second water pump; the first electromagnetic valve is used to control whether the cooling pipeline accesses the water output by the heat exchanger or the water output by the first water pump.

[0010] Further, the first electromagnetic valve is a two-position three-way electromagnetic valve.

[0011] Further, a temperature sensor is arranged at the tail end of the low temperature area, and the temperature sensor is used to detect the temperature of the tire semi-finished product output after cooling; after detecting the product temperature through the temperature sensor at the tail end outlet, the two-position three-way electromagnetic valve controls whether the cooling pipeline accesses the water output by the heat exchanger (i.e. chilled water) or the water output by the first water pump (i.e. normal temperature water).

[0012] Further, the temperature sensor is an infrared temperature detector.

[0013] Further, the heat exchange water channel of the heat exchanger is circularly connected to a water chilling unit in the factory, and the water chilling unit is used to provide heat exchange water for the heat exchanger.

[0014] Compared with the prior art, the present application has the following advantages:

[0015] The low-energy consumption cooling circulation system of the application sets up a cooling mode of double water supply intelligent switching by reasonably setting the first water pump, the second water pump, the heat exchanger and the cooling water circuit controlled by the first electromagnetic valve, so as to reduce the use or non-use of the heat exchanger (especially the low-temperature environment in winter can not use the heat exchanger), reduce the energy consumption and maintenance. The core is that the system sets a temperature sensor at the outlet of the low-temperature area to monitor the temperature of the cooled tire semi-finished product in real time, and feeds back the control of the action of the first electromagnetic valve. When the detected temperature reaches the process requirement, the first electromagnetic valve is switched to make the low-temperature area spray head use the normal temperature water provided by the first water pump for cooling, so as to reduce or even stop the use of the heat exchanger. This control strategy based on actual demand avoids the invalid operation of the water chiller when deep cooling is not needed, greatly reduces the power consumption of the whole cooling system, and realizes the remarkable effect of energy saving and consumption reduction.

[0016] At the same time, this segmented cooling mode (dividing high and low temperature areas for independent control cooling) is also beneficial to ensure the uniformity of the tire semi-finished product cooling process and the product quality. The high-temperature area is cooled by normal temperature water, which reduces the risk of product defects caused by too much shrinkage due to too large temperature difference between water temperature and tire semi-finished product. The whole system structure is reasonable, the automation degree is high, the energy saving effect is remarkable, and it is suitable for large-scale industrial production. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the specific connection structure of part of the components of the application;

[0018] Figure 2 is a schematic diagram of the principle of the application.

[0019] In the figure: 1-bottom frame; 2-water tank; 3-first water pump; 4-second water pump; 5-heat exchanger; 6-first electromagnetic valve; 7-first filter; 8-first on-off valve; 9-second filter; 10-second on-off valve; 11-recovery water tank; 12-temperature sensor; 13-water chiller. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0021] The application provides a low-energy consumption cooling circulation system, which is designed innovatively to reasonably use normal temperature water or cooling water for cooling to save energy. Figure 1The diagram shown is a schematic of the system of the present invention. The system includes a high-temperature zone, a low-temperature zone, and a complete set of pipelines for simultaneously supplying cooling spray water to the high-temperature zone and the low-temperature zone. A valve is connected in the middle of the pipelines to control whether the entire pipeline is combined into a single spray water path or separated into two independent spray water paths. The two spray water paths are respectively connected to a water source via two water pumps. The single spray water path directly outputs room temperature water to both the high-temperature zone and the low-temperature zone without passing through a heat exchanger. Of the two spray water paths, one outputs room temperature water directly to the high-temperature zone without passing through a heat exchanger, while the other outputs chilled water to the low-temperature zone through a heat exchanger.

[0022] More specifically, as shown in the appendix Figure 1 and Figure 2 As shown, the cooling circulation system includes a robust base frame 1, which serves as the fundamental support structure for the entire system. Further, a water tank 2 for storing cooling water is fixedly installed on the base frame 1. A first water pump 3, a second water pump 4, and a heat exchanger 5 are also fixedly installed on the base frame 1. More specifically, the inlet of the first water pump 3 is connected to the bottom of the water tank 2 or its outlet via a pipe, while its outlet is connected to a normal-temperature water supply pipe leading to the high-temperature zone. This normal-temperature pipe extends to the high-temperature cooling section of the tire semi-finished product production line, and uses multiple spray nozzles evenly distributed along the pipe to initially cool the tire semi-finished products at high temperatures. Specifically, the normal-temperature water supply pipe also branches off to the first inlet of a first solenoid valve 6. The outlet of the first solenoid valve 6 is connected to a cooling pipe located in the low-temperature zone, which also uses spray nozzles to provide a second stage of spray cooling to the initially cooled tire semi-finished products. Furthermore, the second input port of the first solenoid valve 6 is connected to the cold water output port of the heat exchanger 5, while the cold water input port of the heat exchanger 5 is connected to the water tank 2 via the second water pump 4. Thus, the first solenoid valve 6 constitutes a crucial switching device, used to control whether the cooling water leading to the low-temperature cooling pipe comes from the room-temperature water of the first water pump 3, or from the low-temperature cooling water pumped by the second water pump 4 and cooled by the heat exchanger 5. Preferably, the first solenoid valve 6 is a two-position three-way solenoid valve, which has a fast response speed, precise control, and facilitates automatic switching.

[0023] A key improvement of this invention is that a temperature sensor 12 is installed at the end of the low-temperature zone, where the semi-finished tire is about to leave the cooling system. This temperature sensor 12 is used to detect the final temperature of the semi-finished tire after two stages of cooling in real time. Preferably, the temperature sensor 12 is a non-contact infrared thermometer, which has a fast response speed, high measurement accuracy, and does not affect the conveying of the semi-finished tire. The signal output terminal of the temperature sensor 12 is electrically connected to the control unit that controls the entire system (the structure of the control unit is not shown in the figure).

[0024] In a preferred embodiment, to ensure the normal operation of the water pump and prevent nozzle clogging, a first filter 7 is installed in series on the connecting pipe between the inlet of the first water pump 3 and the water tank 2 to filter impurities in the circulating water. Furthermore, a first switching valve 8 can be installed between the first filter 7 and the water tank 2 to facilitate the isolation and maintenance of the first filter 7. Similarly, a second filter 9 can also be connected to the connecting pipe between the inlet of the second water pump 4 and the water tank 2. Preferably, a second switching valve 10 is connected between the second filter 9 and the water tank 2, serving a similar function to the first switching valve 8, facilitating the inspection and replacement of the second filter 9.

[0025] Furthermore, to achieve water resource recycling and reduce water consumption, a water recovery tank 11 is installed directly below the high-temperature and low-temperature spray zones. The sprayed water falls into the water recovery tank 11, which is connected to the return water tank 2 via a return water pipe, thus forming a complete circulation loop. The semi-finished tires, driven by a conveyor device, continuously pass between the water recovery tank 11 and the spray heads above, receiving spray cooling.

[0026] Specifically, on the other side of the heat exchanger 5, namely the hot water exchange channel, it is circulated and connected to the existing central chiller unit 13 in the factory. The chiller unit 13 is used to circulate chilled water to the heat exchanger 5, thereby removing the heat from the circulating water from the second water pump 4 through the heat exchanger 5, cooling it to the required low-temperature cooling water.

[0027] The working principle and energy-saving process of this invention are as follows: After the system starts, the first water pump 3 works continuously, pumping water (room temperature water) from the water tank 2 to the high-temperature zone to spray and cool the high-temperature tire semi-finished product. This stage mainly utilizes the temperature difference between the water and the tire for heat exchange. After the water temperature rises, it falls into the recovery water tank 11 and returns to the water tank. Simultaneously, the system's control unit continuously reads the final temperature of the tire semi-finished product detected by the temperature sensor 12. If the final temperature is higher than the target value set by the process, the control unit issues a command to switch the first solenoid valve 6 to a state where its second input port and output port are open. At this time, the second water pump 4 starts, drawing water from the water tank 2 and sending it to the heat exchanger 5 for heat exchange with the chiller water of the chiller unit 13. The cooled low-temperature water is then transported through the first solenoid valve 6 to the spray head in the low-temperature zone for enhanced cooling of the tire semi-finished product. If the temperature sensor 12 detects that the final temperature has reached or fallen below the target value, the control unit controls the first solenoid valve 6 to switch to a state where its first input port and output port are open, and can stop the second water pump 4 from operating. At this point, the water source for the spray heads in the low-temperature zone switches to room-temperature water supplied by the first water pump 3. Since the temperature of the semi-finished tire is already low, room-temperature water is sufficient to complete the final cooling task, thus eliminating the need to start the heat exchanger 5 and chiller unit 13 (or reducing their operating load), achieving energy savings. This process is dynamic, intelligently selecting the most energy-efficient operating mode based on actual cooling needs.

[0028] In summary, this invention utilizes ambient temperature water for cooling by intelligently controlling the switching of dual water sources through temperature feedback. The refrigeration system (including the heat exchanger) is only activated when necessary, effectively avoiding energy waste and significantly reducing cooling energy consumption in the tire production process. It has high economic value and environmental benefits.

[0029] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A low energy cooling circulation system characterized by: The system comprises a high-temperature zone, a low-temperature zone and a complete set of pipelines for providing cooling spray water to the high-temperature zone and the low-temperature zone simultaneously, wherein a valve is connected in the middle of the pipelines, and the valve is used for controlling the complete set of pipelines to be combined into a single spray water pipeline or to be separated into two independent spray water pipelines; the two spray water pipelines are connected to a water source through two water pumps respectively to supply water.

2. The cooling circulation system of claim 1, wherein: The single spray water pipeline directly outputs normal-temperature water to the high-temperature zone and the low-temperature zone without a heat exchanger; one of the two spray water pipelines directly outputs normal-temperature water to the high-temperature zone without a heat exchanger, and the other outputs chilled water to the low-temperature zone through a heat exchanger.

3. The cooling circulation system of claim 2, wherein: The valve is a first electromagnetic valve (6), and the two water pumps are a first water pump (3) and a second water pump (4) respectively; the system further comprises a chassis (1), and a water tank (2) for storing water is fixedly installed on the chassis (1); the first water pump (3), the second water pump (4) and a heat exchanger (5) are also fixedly installed on the chassis (1), the input port of the first water pump (3) is connected to the water tank (2), the output port of the first water pump (3) is connected to a normal-temperature pipeline, the normal-temperature pipeline extends to the high-temperature zone and sprays and cools the tire semi-finished product in the high-temperature zone through a spray head connected to the normal-temperature pipeline; the normal-temperature pipeline is also connected to a first input port of the first electromagnetic valve (6), the output port of the first electromagnetic valve (6) is connected to a cooling pipeline arranged in the low-temperature zone, the cooling pipeline sprays and cools in the low-temperature zone through a corresponding spray head; the second input port of the first electromagnetic valve (6) is connected to the output port of the heat exchanger (5), and the input port of the heat exchanger (5) is connected to the water tank (2) through the second water pump (4); the first electromagnetic valve (6) is used for controlling the cooling pipeline to access the water output by the heat exchanger (5) or the water output by the first water pump (3).

4. The cooling circulation system of claim 3, wherein: The first electromagnetic valve (6) is a two-position three-way electromagnetic valve.

5. The cooling circulation system of claim 3, wherein: A temperature sensor (12) is arranged at the tail end of the low-temperature zone, and the temperature sensor (12) is used for detecting the temperature of the tire semi-finished product output after cooling; after the product temperature is detected by the temperature sensor (12) at the tail end outlet, the first electromagnetic valve (6) controls the cooling pipeline to access the water output by the heat exchanger (5) (i.e. chilled water) or the water output by the first water pump (3) (i.e. normal-temperature water).

6. The cooling circulation system of claim 5, wherein: The temperature sensor (12) is an infrared temperature detector.

7. The cooling circulation system of claim 3, wherein: The heat exchange water passage of the heat exchanger (5) is connected to a cold water unit (13) in a factory, and the cold water unit is used for providing heat exchange water for the heat exchanger (5).

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